Centrifugal apparatus or machines for carrying-out physical or chemical processes (B04)
B04 Centrifugal apparatus or machines for carrying-out physical or chemical processes(4537)
FIELD: machine building.SUBSTANCE: invention relates to agricultural machine building and can be used in liquid manure preparation technology for use as organic fertilizer, in which provided is separation into fractions process. Centrifuge comprises shell, perforated filtrating rotor with drive mechanism, on rotor outer surface blades are fixed, residue removal knife, feeder to feed liquid manure, solid fraction discharge device, wringer roll – roller. Wringer roller shaft extends beyond front panel and connected to separate drive shaft. At that, drive is mounted with possibility of roller approaching or removal from rotor filtering surface.EFFECT: technical result is reduction in solid fraction moisture content and higher operational reliability.1 cl, 4 dwg
FIELD: chemistry.SUBSTANCE: group of inventions relates to a cyclone separator, which separates particles, liquid droplets and or condensing mists from gases without use of a filter element, as well as separator apparatus comprising such separators, and a method for separation of material containing a gas and at least solid particles and/or liquid in such apparatus. Separator for use with gas or liquid comprises at least one housing, having at least one inlet and at least one outlet, at least one spiral mechanism, comprising at least one spiral tube and configured to cause gas or liquid to spiral within said housing. At least one separator is located adjacent to at least one spiral mechanism and is made for further separation of particles from gas or liquid. Separator is made to separate components at a rate of up to 20 l/h for liquid flow or to 2,000 Nl/h for gas flow. Separation apparatus includes a first separator and a second separator, wherein second separator is connected via pipeline with first separator. Method of separating material containing gas and at least solid particles and/or liquid includes following steps: introduction of materia, to be separated into separator, passing material to be separated in at least one spiral mechanism to create vortex motion, passing material to be separated through a separator, comprising multiple ribs, which are configured to create effect of collision for condensation of particles of separated material in non-gaseous form, passing said material after step inside housing, to separate material separated in non-gaseous form, from separator. Further, method comprises removal of at least part of said material, separated in non-gaseous form from at least some part of residual gas, removal of at least some part of separated non-gaseous material from separator through a first outlet. Step for removal of at least some part of said separated gaseous material through second outlet is carried out in separator, configured to separate particles in a condensate with size of up to 10 microns.EFFECT: high efficiency of separation of particles and/or liquid droplets and condensate from gas without using a filter element, as well as enabling operation of separator with low rate of gas flow.22 cl, 5 dwg
FIELD: energy.SUBSTANCE: invention relates to power engineering. Separation device comprises swirler (1, 20, 30) from sheet material, containing plurality of bent blades (4) with edge (6) on flow inlet side, forming inlet angle (α), and edge (8) on flow outlet side, forming outlet angle (β), wherein flow inlet side edge and flow outlet side edge extend from central section (3) to peripheral edge (9), wherein peripheral edge passes between edge endpoints on flow inlet side and edge on flow outlet side, and inlet angle is more than outlet angle, wherein bent blades peripheral edge is made circular on top view. Inlet angle (α) is at least 70°. Outlet angle (β) is in range 20–60°.EFFECT: invention allows to increase fluids separation efficiency, reduce pressure losses.15 cl, 9 dwg
FIELD: gas industry.SUBSTANCE: invention relates to equipment for cleaning gas from impurities in form of solid particles, liquid droplets. Device for extraction of impurities from gas comprises scroll case, rotor with channels, formed by plates inclined to radial direction, axial pipe with flow straightener blades for discharging cleaned gas. Rotor shaft is hollow and perforated, perforated cylinder is fixed on shaft. Scroll case is connected to curved channel, on inner wall of which behind section for inlet of contaminated gas there is a spring-loaded blade and there is a window for discharging part of gas from scroll case into curvilinear channel. On periphery of curvilinear channel before scroll case for discharge of separated impurities there is a pipe with hydraulic gate. Curvilinear channel, scroll case, rotor, cleaned gas discharge pipe, pipe with hydraulic gate are fixed in a high-pressure shell with pipes for inlet of gas and outlet of impurities in form of a suspension. Inside of axial pipe with flow straightener blades for discharge of cleaned gas from rotor in bearing housing, there is a stuffing box with a pipe for inlet of liquid into hollow perforated shaft.EFFECT: high efficiency of cleaning gas at variable operating conditions and carrying out purification process in conditions of high pressure gas.1 cl, 3 dwg
FIELD: technological processes.SUBSTANCE: invention relates to devices intended for separation of liquid inhomogeneous systems using centrifugal forces and can be used to clean from mechanical impurities and water, for example, fuels, oils, hydraulic and washing liquids in their recovery at enterprises, as well as directly at mobile units. Centrifuge for cleaning technical oils comprises a housing, an installed in it on bearings rotor with jet nozzles including a drum, a column with a base containing radial inlet channels and a vertical channel made along its axis. In the cover of the drum and in the base of the column there are concentric grooves of identical radius R, in them there are two distributing discs with radial slots forming annular cavities around the column connected via the radial channels in the upper part of the column with a vertical inlet channel and symmetrically arranged holes of inlet into the jet hydraulic drive nozzles in its lower part. Grooves are also deflectors to change the liquid flow at the inlet into the rotor at the top from the radial direction into the axial one and at the bottom from the axial into the radial ones. On the distributive discs there is a cylindrical jar with radius r separating the inner non-flow cavity of the rotor from its peripheral flow section.EFFECT: technical result is improved quality of the liquid cleaning by providing its movement inside the rotor parallel to the axis of rotation with uniform distribution along the circular cross section of the flow.5 cl, 1 dwg
FIELD: ventilation.SUBSTANCE: invention relates to an air filtering system, intended for blocking particles in a dryer, in particular, plant grains. Filtering system comprises rotating cylinder (1) of filtering member (3) driven by gearmotor (2), through which whole exhaust air flow (8) passes from the dryer for plant grains, containing solid particles (particle size is more than the size of mesh cells). Air, exhausting from the dryer, is discharged into the environment, freed from such particles. In the lower part of the filtering system there is funnel (7) for collection of material with higher specific weight, from which the air with collected particles passes through system (10) of pipes connected to fan (5), into an auxiliary system for filtering solid wastes. In the inner part of the rotating cylinder there is enclosure (4), in which the air flow is generated for cleaning the filtering member, from which the air with particles is discharged through system (10') of pipes, connected to fan (5'), into an auxiliary system for filtering solid wastes. Outside the mesh filter there is system (6) for injection of compressed air, the position of which coincides with the position of enclosure (4). Its function is removal of particles stuck in filtering member (3), by means of intermittent air jets.EFFECT: technical result is efficient filter cleaning.6 cl, 5 dwg
FIELD: mining.SUBSTANCE: invention relates to mining, processing and concentration of minerals and can be used in coal, mining and chemical industries for dehydration of fine products. Installation for dehydration of ore or coal flotation concentrates consists of two horizontal filtration centrifuges with elastic rotors, frame, electric motor, two squeeze rollers with automatic drives, initial pulp feed and centrate discharge pipelines, v-belt drive. Centrifuge means are mounted towards each other and have a common hopper, common initial pulp feed pipeline equipped with a distribution valve, operating in switching automatic mode in compliance with the cycles time of dehydration in centrifuges. Rotors rotation is performed by an electric motor with two shaft outputs via v-belt drive.EFFECT: technical result is efficiency increase of dehydration, as well as reduction of solid particles ash with centrate.1 cl, 2 dwg
FIELD: oil and gas industry.SUBSTANCE: invention relates to oil and gas industry and can be used for separation of gas, oil and water. Centrifugal separator for separation of gas and immiscible liquids with different density using kinetic energy of pumped product includes an inlet pipe, fixed housing, liquid mixture flow swirling device, mechanical flow divider and unloading device with continuous unloading. Inlet pipe is connected to separator at a tangent to housing of flow swirling device, in form of a flat Archimedean spiral. Flow divider is made in form of a fixed partition, equipped with a rotary blade which can be turned by a servo drive connected with a control system. Rotary blade is equipped with two sensors of electroconductivity of separated liquids, arranged on opposite sides of blade, sensors are connected to an electrical circuit controlling servo drive for turning blades, and electrical circuit includes a logic element for increasing resolution of flow divider.EFFECT: high quality of separation of mixtures of liquids.1 cl, 4 dwg
FIELD: treatment plants.SUBSTANCE: group of inventions relates to separator for separation of contaminants in the form of solid particles, aerosol and fluid from fluid flow, as well as to a system of crankcase ventilation of internal combustion engine containing such separator. Separator for separation of contaminants from fluid flow comprises first input designed for inlet of the first fluid medium flow, containing carried by them contaminants, first and second controlled inertial separators, which are connected to each other in series, and a pump, connected to the second controlled inertial separator and designed to create low pressure zone for suction of the first fluid medium flow through the first and second controlled inertial separators. First controlled inertial separator is connected to the first input of the first inlet of fluid medium flow with the first input. Each of the controlled inertial separators is intended for separation of contaminants from the first fluid medium flow. First chamber designed for inlet of the first fluid medium flow, the second chamber connected with the first chamber at least one opening, made so that the first fluid flow is accelerated when passing through the hole and facing surface of baffle so that contaminants are separated from the first fluid medium flow, and drive to adjust the cross-section of at least one hole in accordance with the pressure difference between fluid pressure in the first chamber and the reference fluid in the third chamber. Crankcase ventilation system has a channel for case gases to feed crankcase gases from the case, and separator, in which the first input is connected with channel for case gases. Internal combustion engine comprises crankcase ventilation system, where pump includes the fourth chamber having the second input of the second inlet of fluid in the fourth chamber, note here that in the second inlet nozzle is located in the form of a convergent nozzle for acceleration of the second fluid medium flow, and the third input of the first inlet of fluid medium flow, the third input is located relative to the second inlet so that the second fluid flow can engage and accelerate the first flow of fluid medium, and where the second input is designed for gas flow under pressure from the turbocharger, and the separator is intended for separation of carter oil of crankcase gases.EFFECT: high efficiency of crankcase ventilation of internal combustion engine as well as prevention of increase of pressure at the inlet of fluid medium to unacceptable values.15 cl, 16 dwg
FIELD: biochemistry.SUBSTANCE: group of inventions relates to biochemistry. Disclosed is a device for centrifugal filtration for separation of living cells and a cells separation system. Device includes a spindle, a rotary lever, a filter with a microporous hydrophilic membrane mounted on the rotary lever. Filter comprises a front cavity with an inlet hole and a rear cavity with an outlet hole, a microporous hydrophilic membrane between the front and the rear cavities. Each filter pore diameter is smaller than the one of a living cell required for separation. During centrifugation water, biological particles and biomolecules in the cell suspension can pass through the microporous hydrophilic membrane of the filter, and the cells can be blocked by the microporous hydrophilic membrane of the filter and reflected from the filter membrane with deposition inside the front cavity. System comprises a sealed pipe system and a measuring system, the sealed pipe system comprises the above said device, a primary filter, a rotating joint, a disposable syringe, a container for Ringer's solution with lactic acid, a tank for the cell suspension, a tank for enzyme solution and a pipe assembly.EFFECT: invention provides fast separation of cells, as well as reduced cell damage during the separation.11 cl, 5 dwg
FIELD: data processing.SUBSTANCE: invention is intended for classification of rocks, construction and other materials. Mesh pneumatic classifier comprises cylindrical housing (10), fan (1), loading (4) and unloading devices. Housing is divided into working chambers (11, 14, 17) classifying meshes (13, 16, 17). Classifying meshes are located perpendicular to the air mixture flow. Size of the meshes cells decreases along the air mixture flow direction. Housing is equipped with diffuser (9) with ejector (8). Loading device in the form of a hollow cylinder consists of boosting (3) and mixing (6) parts. Boosting part on the side of the air flow inlet is provided with converging-diverging nozzle (2). Mixing part is located after the boosting one along the air flow direction. Mixing part on the inner surface has swirler (7) of the air mixture. Each of the working chambers in the lower part has slotted hole (26, 24, 22). Under each of the slotted holes there are unloading devices. Unloading devices are made as separate bins (27, 25, 23) with locking mechanisms in the lower parts.EFFECT: invention provides higher efficiency and productivity of separation.1 cl, 3 dwg
FIELD: food industry.SUBSTANCE: invention relates to separation of a suspension with washing of heavy component and can be used in food, chemical and other industries. Multi-cyclone apparatus consists of multi-cyclones with pipes for discharging liquid and condensed products, forming separation stage for initial product - suspension into condensed product, containing mainly a heavy component, and liquid product, mainly containing a light component - impurities, pumps, connecting pipelines, forming with multi-cyclones and pumps a single structure, pipe for feeding clean water required for washing heavy component. Each separation stage consists of three multi-cyclones with cross circuit for separating product into liquid and dense products. Upper product of third stage at counterflow circuit is supplied to input of second stage. Upper product of second stage is supplied to input of first stage, and upper product of first stage is output product containing light impurities and soluble substances. Dense product of third stage is output product containing heavy component - washed starch.EFFECT: high quality of heavy component.1 cl, 3 dwg
FIELD: food industry.SUBSTANCE: invention relates to starch production and is intended, mainly, for extraction of starch suspension from potatoes and can also be used for separation of raw materials of vegetable origin. Filtering centrifuge with an attrition unit, mainly for extraction of starch from potato raw material, comprises a stationary body with devices of material feed and discharge of separated phases, a drive and a rotary driven fitted on a shaft rotor with a filtering conical screen fixed on a disc with grinding elements of the attrition unit. Herewith the attrition unit is equipped on the feed device side with the disc with grinding elements, which shaft with own rotation speed from the drive is installed in the shaft of the disc with the screen, and between opposed grinding elements of the discs there is a narrowing to the screen slot, and the disc located on the side of the feed device also has on its side grinding elements, between which there are holes in the disc for channels to inlet the attrited material into the slot.EFFECT: technical result is higher efficiency of destruction of potato raw material cell structures and increased intensity of starch extraction from the potato raw material.1 cl, 4 dwg
FIELD: machine building.SUBSTANCE: series of inventions relates to centrifugal separator for separation of a mixture of liquids containing a dividing plate made of metal with possibility of compression in the package of separation plates and to a method of making the separating plate. Separation plate for centrifugal separator for separation of mixture liquids is shaped to truncated cone with inner and outer surface and multiple spacers protruding at certain height above at least one of the inner surface and outer surface, to ensure the gaps between the mutually adjacent separating plates in the packet. At least some of the spacer elements have such size that each spacer has a width that is less than 2 mm along the surface of the separating plate. Wherein the surface of the separating plate is made with distribution of spacers, which is made in form of clusters of spacers on certain areas of the surface of the separating plates, in order to provide equally spaced gaps in compressed pack of plates. Thickness of the separating plate is less than than 0.6 mm, and the spacer elements are integrated in the form of one part with material separation plates. According to the method of separating plates making separating plate is formed by rolling a metal sheet with roller and mandrel, wherein roller forms separating plate at mandrel, which has support surface in the form of truncated cone with grooves corresponding with spacer elements. Wherein the mandrel has such a scheme for distribution of these recesses in order to make spacers in form of one part with a separating plate, in order to provide equally spaced gaps in compressed pack separating plates. Centrifugal separator for separation of mixture of liquids comprises a pack of separation plates inside the centrifugal rotor for separation of mixture of fluids.EFFECT: technical result is enabling equidistant gaps between separating plates in compressed packet.12 cl, 7 dwg
FIELD: machine building.
SUBSTANCE: group of inventions relates to a rotary machine, in particular to decanter centrifuge, and to the liquid phase outlet hole assembly. Rotary machine comprises a drum installed with the ability of rotation around the axis to create cylindrical bath for the loaded pulp, herewith the drum has a heavy phase outlet hole, a support plate arranged onto one of the longitudinal ends of the drum, at least one outlet hole made in the support plate, and the liquid phase outlet hole assembly. Liquid phase outlet hole assembly is configured with the ability of been mounted above the outlet hole of the rotary machine and has a flange and an inlet hole made in the flange. Liquid phase outlet hole assembly contains at least one open straight channel with longitudinal axis. Herewith the longitudinal axis of the said channel passes at an acute angle to the flange and the said channel is extended along the longitudinal axis.
EFFECT: improved efficiency of power consumption.
15 cl, 12 dwg
FIELD: treatment plants.
SUBSTANCE: invention is intended for treatment of detergent solutions and waste water. Device includes housing with device for supply of cleaned detergent solution (waste water) and discharge of separated phases, and separation unit. Separation unit is composed as cylinder-cone with mesh ends accommodating receiver for cleaned detergent solution (water) with mesh input, and with wood chips therein. Inlet branch pipe is arranged tangentially to housing.
EFFECT: technical result is improved efficiency of treatment.
1 cl, 1 dwg
FIELD: oil and gas industry.
SUBSTANCE: invention can be used, for example, for the separation of oil in the oil fields, on marine separators for oil refining. Installation for separation of oil contains oil heater and a separator. Separator comprises a housing, the drive and mounted in bearings of rotor conductive, non-magnetic material configured as a drum separator. Drive consists of an electric motor having a stator having an axial portion with a core and a winding, in which the end parts of compound has rendered monolithic tube for cooling the stator and heating oil. Stator further includes a cylindrical portion, wherein the two stator windings are connected in series.
EFFECT: technical result of the claimed invention is to increase the energy efficiency of the installation for the separation of oil, reduction in weight and size, increasing reliability.
1 cl, 1 dwg
FIELD: machine building.
SUBSTANCE: invention relates to magnetic supports vertical rotors rotating devices, for example, rotors of gas centrifuges, energy accumulators, generators, gyros and similar devices. Vertical rotor magnetic support, located in device in form of hollow thin-wall vertical rotor installed in housing and resting on thrust bearing, comprises system of permanent magnets arranged coaxially with rotor. System of magnets comprises magnets fixed on fixed part of device, between which there is one or more magnets fixed on rotating part of device, and one or more ferromagnetic elements mounted on rotating part of device.
EFFECT: providing required load on lower support, which value does not depend on vertical movements of rotating part relative to fixed part with dynamic changes of rotor axial position, ensuring operating capacity of fast-rotating rotors during acceleration and operation, higher reliability and durability of rotors.
7 cl, 2 dwg
FIELD: gas purifying devices.
SUBSTANCE: air cleaner comprises air filters arranged in housing, in lower part of which there is window with bypass valve containing pivoted cover, characterised by that bypass valve is equipped with shock-absorber, articulated by one end on bypass valve cover, and other end is on frame attached to house and sealed by arranged below bypass valve, wherein protective screen is located on frame.
EFFECT: air supply process stabilisation.
1 cl, 3 dwg
FIELD: technological processes.
SUBSTANCE: invention relates to a method of producing gypsum with the help of smoke gas desulphation plant. According to a method of extracting gypsum by means of installation for flue gas desulphation gypsum suspension, which also contains fine-grain materials such as, for example, activated carbon particles or particles of residual carbonates, occurring in wet flue gas cleaner, is thickened with the help of at least one hydraulic cyclone and thickened plaster suspension is discharged via lower hydraulic cyclone drain. Note here that water is fed into hydraulic cyclone along the feeding line in addition to a gypsum suspension, thereby leading to impoverishment along with fine-grain material relative to suspension volume in the lower outlet, and the water inlet flow area is added to the hydrocyclone as barrier water flow to form a barrier layer of water. Barrier water flow and gypsum suspension are separated in hydraulic cyclone using a plate until barrier water flow and flow of the gypsum suspension are sufficiently stable.
EFFECT: reduced content of fine material fraction in the lower hydraulic cyclone outlet.
7 cl, 4 dwg
FIELD: mining industry.
SUBSTANCE: group of inventions relates to the dynamic separation of particles such as those resulting from crushing and grinding extracted minerals or recycled materials. According to a method a fluid with dispersed particles is subjected to a centrifugal action in at least two successive stages in order to separate particles having a different terminal velocity. For this purpose, there is a regulation step carried out in an intermediate position between the stages. Fluid coming from the first stage enters the second one axially. Regulation step comprises the introduction of a fluid between said stages. Introduced regulation fluid is provided by a rotational velocity component. Apparatus comprises at least two stages wherein a fluid with the particles dispersed therein is subjected to a centrifugal action in order to separate particles having a different terminal velocity. It comprises operating regulation means in an intermediate position between the stages. Said means comprise a channel for introducing a regulation fluid at an intermediate location between the separation stages and an intermediate mixing header. Said mixing header is located between the separation stages. Channel for introducing a regulation fluid is arranged tangentially with respect to intermediate mixing header.
EFFECT: technical result is higher separation efficiency and reliability.
8 cl, 13 dwg
SUBSTANCE: invention relates to hydraulic transport of loose materials, sludge, particularly for pumping of liquids with considerable content of suspension, having abrasive capacity. Device for hydraulic transport of loose materials comprises loading device (1) and unloading, housing (3), inside which there is vertical drive shaft (4) with cone nozzle (5), nozzle (6) output of cleaned phase and branch pipe (8) for outlet of condensed phases. Branch pipe (6) is connected with rotary pump (7), and branch pipe (8) is connected with mixing chamber ((9). On surface of nozzle (5) there are holes (10) arranged in circular rows. Size of holes (10) decreases from lower row to upper row. Mixing chamber (9) is made in form of hollow toroid in upper part of which there is a window (11). Unloading device represents a branch pipe arranged at an acute angle to plane of mixing chamber (10).
EFFECT: invention is aimed at creation of simple and reliable device for hydraulic transportation, which provides low wear of working elements in operation.
1 cl, 3 dwg
FIELD: gas industry.SUBSTANCE: invention relates to gas producing industry and is intended for cleaning natural gas from mechanical impurities, evacuated to hydrocarbon production from wells of operating stock. Device for cleaning natural gas comprises cylindrical housing with coaxially installed filtering element, a swirler installed at angle to axis of filtering element. Housing upper part is equipped with two inlet nozzles for uniform gas entry. Flush union is installed in lower part of housing. Swirler is made in form of steel plate located throughout length of filter element.EFFECT: higher reliability and fail-safe operation of gas cleaning system.1 cl, 2 dwg
FIELD: machine building.SUBSTANCE: invention relates to separation of mixtures. Hydrocyclone includes inflow area (2) with tangential inlet hole (4) for fed pulp (6), separation area (3), which is adjacent to inflow area (2) and which comprises nozzle (8) of lower drain to discharge coarse materials or coarse fraction. In tangential inlet hole (4) area there is at least one extra inlet to feed barrier fluid flow. Said barrier fluid flow and flow fed pulp separated from each other by means of plate (10), at least in upper area of hydraulic cyclone (1). Invention also relates to method of hydraulic cyclone (1) operation according to invention.EFFECT: technical result: improvement of separation.13 cl, 6 dwg
FIELD: technological processes.SUBSTANCE: group of inventions relates to centrifugal separator for separation of fluid mixture of components on, at least, first and second components, as well as to separation of components in the liquid mixture. Centrifugal separator includes rotor made with possibility of rotation around the axis of rotation, an inlet chamber made in the rotor, inlet pipe extending into the rotor, having a hole in intake chamber for supply of liquid mixture of components, intake device in intake chamber, containing multiple circular discs aligned with rotor to make fluid passages between disks, or spiral element, coaxial with rotor to make fluid passages between turns of helical element. Whereupon separator comprises vanes arranged upstream of inlet device for induction of preliminary rotation and preliminary acceleration of the liquid mixture. Method for separation of components in the liquid mixture includes steps providing said centrifugal separator and liquid mixture to be separated, and separate at least one component from a liquid mixture using separator.EFFECT: minimising the risk of internal overflow in separator rotor.19 cl, 3 dwg
FIELD: machine building.SUBSTANCE: group of inventions relates to centrifuge of periodic action and to a method of making cover of centrifuge for periodic action. Cover of centrifuge of periodic action with drum has fluid discharge holes, obtained during centrifugation, wherein holes have a cross section in form of ellipse. Cross section of holes is continuous from inner side to outer side of cover. Diameter (a2) of cross sections of holes in direction parallel to axis of drum, on inner side of cover is equal or approximately equal to diameter of (a1) of cross sections of holes in direction parallel to axis of drum, on outer side holes. Diameter of (l2) of cross sections of holes in peripheral direction on inner side of cover is less than diameter (l1) of cross sections of holes in peripheral direction on outer surface of cover, resulting in cross-sections holes expanded outside. Method of producing cover of centrifuge of periodic action with drum according to first version consists comprises making elliptical holes in metal sheet of cover to its curvature by cutting with water jet, from which after rounding sheet holes are formed with elliptical cross section. Method of producing cover of centrifuge of periodic action in another version consists in that cover after rounding sheet metal jacket holes are made with cross section in form of ellipse by water jet. Walls of openings are made with continuous configuration from inner side to outer side and in peripheral direction, diameter (l2) of cross sections of holes in peripheral direction on inner side of cover is less than diameter (l1) of cross section of holes in peripheral direction on outer side of cover, resulting in cross-sections of holes expanded outside.EFFECT: optimising cover of centrifuge due to reduction of stresses in it in area of holes, which provides durability and stability of centrifuge drum.15 cl, 7 dwg
FIELD: technological processes.SUBSTANCE: invention relates to cleaning gases from dust in heat engineering, ferrous and nonferrous metallurgy. Method of gas freeing from dust includes input of gas subjected to cleaning into the cyclone with top axial exhaust branch pipe, gas cleaning from dust by centrifugal forces at progressive motion of the rotating flow downwards with turned upward, collecting the stream of the collected dust in dust collector with dust exhaust hole with B diameter, spraying in a dust collector secondary coagulating liquid with density of ρl in the form of jets, oriented on the collected dust flow to obtain the collected dust and liquid, briquetting mixture caught dust and fluid on roller press to produce briquettes with density ρb and sizes L. Roller press consists of two rolls with diameter D installed with gap h in between in the dust collector lower part. Note here that additionally measured is dust content of gas subjected to cleaning C0 and cleaned flow C1, volume flow rate of subjected to cleaning Vg and secondary coagulating liquid Vl. After that, optimal roll rotation frequency is set for the roller press, determined by formula: n=[Vg(C0-C1)+Vl·ρl]/π·D·B·L·ρb.EFFECT: higher degree of gas freeing from dust and stability of briquetting the mixture of caught dust and fluid.1 cl, 1 tbl, 1 ex, 2 dwg
FIELD: technological processes.SUBSTANCE: invention relates to equipment for separation of solid particles from fluid, in particular, to batch centrifuges separation of crystalline sugar from suspensions crystalline sugar. Device for separation of a syrup from sugar fillmass containing centrifuge comprises batch centrifuge with wall and base (12), as well as a cylindrical drum arranged in casing. In casing of centrifuge there are outlet holes (41, 42). First receiving container (61) for syrup leaving outlet holes, is used, in particular, to receive green effluent. Second receiving container (62) for syrup leaving outlet hole (42), is used, in particular, to receive white effluent. Control device (81) and valve or shut-off units (71, 72), which are controlled by control device (81) are located at outlet holes (41, 42) or in them, or in connecting lines (51, 52) leading from outlet hole (42) to receiving containers (61, 62), for purpose of green effluent separation and white effluent. There is at least one detector (80) in channel between point of incidence syrup syrup movement on wall of casing centrifuge and controlled valve or shut-off units (71, 72). Detector (80) has a measuring device for measuring physical quantity, which displays difference between green and white effluent. Method for separation of a syrup of sugar production fillmass by means of proposed device is characterised by that measured physical value, representing difference between green effluent and white effluent, on path between point of incidence syrup syrup out of wall of casing of centrifuge and controlled valve or shut-off units (71 and 72). Each valve is controlled or shutoff unit (71, 72) depending on measured values of physical quantity so that components syrup, detected as green effluent or white effluent, flow to receiving containers (61 and 62), intended for their reception.EFFECT: reliable separation.16 cl, 7 dwg
FIELD: machine building.SUBSTANCE: invention relates to magnetic supports of vertical rotors of fast-running instruments: gyroscopes, energy accumulators, generators of turbo-molecular pumps, centrifuges and similar devices. Vertical rotor magnetic support, located in device in form of hollow thin-wall vertical rotor installed in housing and resting on thrust bearing, comprises system of permanent magnets arranged coaxially with rotor. System of magnets comprises magnets fixed on nonmobile elements of the device, between which there is one or more magnets fixed on the rotating elements of the device.EFFECT: creation of a magnetic support with reinforced radial rigid connection with preservation of allowable load on the lower support ensuring operability of fast-running rotors during acceleration and operation, as well as higher reliability and durability of rotors.6 cl, 3 dwg
FIELD: machine building.SUBSTANCE: invention relates to supports of high-speed rotors with vertical rotation axis, for example, rotors of gas centrifuges, energy accumulators, gyros and similar devices. Vertical rotor magnetic support comprises aligned vertical rotor ring axially magnetized magnet with pole tip located on cover of sealed housing, and located opposite lower end of magnet ferromagnetic bushing installed on top cover of thin-wall vertical rotor. In lower end of ferromagnetic bushing has radial collar, above which there is conical generatrix surface in form of reverse truncated cone.EFFECT: efficient design of top magnetic support, providing its radial rigidity and strength, as well as high reliability of centrifuge.5 cl, 4 dwg
FIELD: instrument making.SUBSTANCE: invention relates to devices for continuous treatment and separation of substances according to specific weights containing in industrial, household and other exhaust gases, and can be used in chemical, food and other industries, as well as in municipal services when processing air media of treatment facilities. Device for degassing air environments containing small solid fractions comprises a tapered cylinder housing with tangential feed, drain and sand pipes. In feed pipe, drain pipe, as well as along central axis of housing there are discharge units electrical ozonising devices, wherein cross-sectional areas of tapered cylinder housing, feed, and drain pipes and discharge units are in ratio of 1/(0.5÷0.7), which creates resistance to air flow, which at corresponding air supply pressure, enables creation of stable turbulence.EFFECT: high quality, as well as more intense processing due to application of high-efficiency continuous technology, allowing to let air flow in device at a rate of 1 5/10 to 3 5/10 m/s depending on structural-technological features.1 cl, 1 dwg
FIELD: instrument making.SUBSTANCE: invention relates to devices for continuous treatment and separation of substances according to specific weights containing in industrial, household and other exhaust gases, and can be used in chemical, food and other industries, as well as in municipal services when processing air media of treatment facilities. Degasser for air environments containing a coarse solid fraction, consisting of a tapered cylinder housing with tangential feed, drain and sand pipes. At inlet of drain pipe there is a discharge unit of an electrical ozonising device. Cross-sectional areas of tapered cylinder housing, feed, drain pipes and discharge units are in ratio of 1/(0.5÷0.7), which creates resistance to air flow, which at corresponding air supply pressure, enables creation of stable turbulence.EFFECT: high quality, as well as more intense processing due to application of high-efficiency continuous technology, allowing to let air flow in device at a rate of 1 5/10 to 3 5/10 m/s depending on structural-technological features.1 cl, 1 dwg
FIELD: food industry.SUBSTANCE: invention relates to devices for producing stable dispersion systems with the liquid phase and can be used in food, chemical, pharmaceutical and other industries. Rotor-pulsation apparatus comprises housing with inlet 8 and outlet 9 nozzles, motor 1 with controlled frequency of rotation, drive-multiplier 2, including horizontal shaft 3 and vertical shaft 4 coupled by screw gear. In housing there is rotor 11 and stator 13 with working elements in form of concentric teeth. Rotor 11 is rigidly secured on vertical shaft 4. Vertical shaft of drive multiplier 2 is installed in flexible supports with possibility of vertical and horizontal displacements.EFFECT: higher intensity of dispersion, emulsification and homogenisation in disperse systems with liquid phase containing food fibres, due to imposition of vertical and horizontal vibrations, applied to rotor.1 cl, 1 dwg
FIELD: machine building.SUBSTANCE: invention relates to a discontinuous centrifuge and can be used, in particular, for separation of crystalline sugar from suspensions of crystalline sugar. Discontinuous centrifuge comprises a rotatable centrifuge drum incorporating a drive spindle, a casing and a base, suspended in swinging manner, a hub of centrifuge drum, a scraper for scraping a product off inner wall of casing of drum, comprising scrape-off element capable of rotation around axis parallel with drum rotational axis. Scraper is installed irrespective of swinging suspension of drum and has no possibility of vertical movement. Drum hub comprises several supports for direct or indirect connection of drum casing with drum drive spindle. Consoles of hub have upper surfaces, which are located below drum base.EFFECT: high efficiency due to reduced time of use, higher reliability of scraper, which can withstand heavy loads during operation.9 cl, 5 dwg
FIELD: processes.SUBSTANCE: invention relates to a centrifugal separator for cleaning of gas containing oil primarily for cleaning crankcase gases from an internal combustion engine such as a diesel engine. Centrifugal separator comprises a stationary casing defining a separation space and having a first end and an opposite second end portion, wherein the stationary housing has an inner wall surface facing towards the separation space, an inlet passage extending to the separation space and forming the inlet for gas to be cleaned, the centrifugal rotor, which is provided in the separation space and extends from the first end to the second end portion, wherein the centrifugal rotor includes a spindle and a plurality of separating discs held by the spindle. Separator also includes a drive element provided for rotation of the centrifugal rotor in a rotational direction about a rotational axis to create rotary gas volume, whereby the oil is separated from the gas by centrifugal force, a gas outlet duct for discharging purified gas from the separation space, the oil outlet for release oil from the separation space and the oil supply device. Oil supply device adapted to supply an amount of oil in the separation space that current oil film produced at the surface of the inner wall during operation of the centrifugal separator.EFFECT: technical result is a reduction in the accumulation of viscous separation space of the centrifugal separator, particularly at the inner wall surface of the housing of the centrifugal separator.17 cl, 3 dwg
FIELD: machine building.SUBSTANCE: vibration centrifuge contains a separation sieve, connected with a drive shaft, the vibrator able to generate vibrations in the separation sieve, one or more limiting elements, mainly able to limit the vibration generated by the vibrator to a single degree of freedom in the direction parallel to the axis of the drive shaft, and a displacing element engaged with the vibrator to set the vibration frequency.EFFECT: increased efficiency of dampening of the vibration centrifuge.20 cl, 3 dwg
FIELD: technological processes.SUBSTANCE: group of inventions relates to a method of treating freely flowing product by means of at least one centrifuge and to said centrifuge, operating in continuous mode. Method of processing freely flowing product by means of at least one centrifuge, operating in continuous mode, includes following stages: a) feeding freely flowing product into a centrifuge drum, b) separating a solid phase from freely flowing product and/or separating said product into two or more liquid phases, c) extracting one or more liquid phases and/or solid phase from centrifuge drum, d) feeding product to be processed in a continuously or discontinuously pulsating volume flow. Treated product is fed at constant pulsation frequency with duration of period depending on one or more of following parameters: inner radius (ri) of a plate of a set of plates, outer radius (ra) of plate, value of inlet flow (QT) in intermediate space between plate and adjacent plate, angle (α) of plate and/or distance (h) from plate to adjacent plate. Centrifuge, in particular separator, has a revolving centrifuge drum, in particular a separator drum with a vertical rotation axis, in which there is a set of plates. Separator drum also has at least one inlet for feeding product to be treated and at least one outlet for discharge of at least one liquid phase and at least one outlet for discharge of at least one other phase, in particular, liquid phase or solid phase. Centrifuge also comprises means to ensure continuous or intermittent pulsation of product volume flow forced into centrifuge drum, treated product supply is carried out with constant pulsation frequency, having duration depending on one or more of said parameters.EFFECT: high efficiency of treating liquid.17 cl, 4 dwg
FIELD: technological processes.SUBSTANCE: group of inventions relates to screw centrifuge control torque at input of screw centrifuge geared shaft. Auger centrifuge with solid rotor for processing of drilling mud with rotating drum and with rotary screw has driving device to drive drum and screw with drive motor and reduction gear unit for creation of gear ratio between drum rotation speeds and screw during centrifuge operation. At that, reduction gear unit inlet reducing shaft is rigidly fixed without possibility of rotation by means of reloading lever made with possibility of changing shape in case of overload torque. Reloading lever, one end of radially remote from axis of rotation of reduction gear input shaft is detachably connected directly to inlet gear shaft or with part rigidly connected without possibility of rotation with inlet gear shaft. Method for control of torque at screw centrifuge input gear shaft with solid rotor during treatment of drilling mud has following stages: a) cleaning of drilling mud, if torque screw centrifuge with solid rotor lower than first limit value, b) at least one working parameter of screw centrifuge with solid rotor, if torque reaches first limit value or exceeds it, c) disconnection of screw centrifuge with solid rotor if torque reaches second limit value or exceeds it, and d) automatic or controlled actuation of protection against overload torque, if change of torque moment in time exceeds limit value dM/dt.EFFECT: providing protection against overload torque on fixed shaft, as well as stops centrifuge only in case of emergency failure.15 cl, 6 dwg
FIELD: oil and gas industry; environmental protection.SUBSTANCE: invention can be used for land reclamation, contaminated by petroleum products, as well as in other industries where there is a need to separate the oil or the oil itself from the ground and water. Hydrocyclone oil trap is a cylindrical-hydrocyclone with a drain, sand supply pipes, the latter is coaxially mounted pipe. Oil separator has an additional drain oil-discharge tube and pipe, coaxially mounted in the sand pipe is provided with confuser covering the lower part of the additional oil-discharge pipe the top of the internal fluid flow. Thus between confuser and additional drain pipe located crossing window for air or steam.EFFECT: technical result is to intensify work hydrocyclone oil separators and increase the efficiency of separation of oil from the soil and water.1 cl, 3 dwg
FIELD: treatment.SUBSTANCE: invention relates to devices for continuous treatment and separation of substances according to specific weights containing in industrial, household and other exhaust gases, and can be used in chemical, food and other industries, as well as in municipal services when processing air media of treatment facilities. Air cyclone for air media, containing fine solid fractions, includes tapered cylinder casing with tangential feed, drain and sand-containing branch pipes. Inside the body along the central axis there is a discharge unit of electrical-ozonizing device. Cross section area of air cyclone housing and discharge unit are made in the ratio of 1/(0.5÷0.7), providing resistance to air flow, which at appropriate pressure of air supply ensures the possibility of creation of stable turbulence.EFFECT: high quality, as well as more intense processing due to application of high-efficiency continuous technology allowing to let air flow in the device at the rate of 1 5/10-3 5/10 m/s depending on structural-technological features.1 cl, 1 dwg
FIELD: mining.SUBSTANCE: invention relates to mineral processing and can be used to separate solids by density, for example processing gold ore and fine sands. Centrifugal concentrator has a bowl with grooves. Bottom of bowl is connected to one end of shaft. Bowl drive is fixed on frame and connected to other end of shaft. Drive includes at least one permanent magnet with alternating poles and interacting with it round ferromagnetic soft magnetic element, axis of which coincides with axis of bowl and which provides non-uniform, with respect to poles of permanent magnet, magnetic resistance turning on permanent magnet poles. Device has a unit for periodic reverse flow direction and drive movement is provided to periodically change alternating bowl rotation speed, so that there is a shift to border wall of pulp layer with respect to its upper layers and shift of pulp relative to grooves of bowl.EFFECT: technical result is higher reliability.1 cl, 3 dwg
FIELD: machine building.SUBSTANCE: system of cleaning without disassemblage connected to the centrifugal separator contains the centrifugal separator comprising a rotor installed to rotate around the axis of rotation and to create inside it a separation space, a separator input for fluid, continuing inside the separating space, a first separator output for fluid continuing from the separating space. Wherein the said first separator output contains an outlet pump made with possibility to ensure fluid flow from the first separator output. The system of cleaning without disassemblage contains a tank for cleaning fluid, cleaning fluid pump to deliver the cleaning fluid from tank to the separator input. The system of cleaning without disassemblage is made with possibility of fluid flow reception from the first separator output. Wherein the cleaning fluid pump is made with possibility of the cleaning fluid transfer from the tank to the separator input by the received fluid flow. The method of cleaning of the centrifugal separator contains stages, when the system of cleaning without disassemblage is connected to the centrifugal separator, the rotor is rotated with work speed, the rotor separating space is filled with fluid, fluid flow from the separating space is arranged through the first separator output by means of the outlet pump, the fluid flow is received to the cleaning fluid pump, the cleaned fluid is discharged from the tank to the separator input by means of the received fluid flow, and cleaning fluid is injected inside the separating space, for example, for cleaning of at least parts of the separating space.EFFECT: assurance of possibility of work of the system of cleaning without disassemblage regardless of the external pressure sources by means of the cleaning fluid injection by means of the fluid flow from the outlet pump of the centrifugal separator.10 cl, 1 dwg
FIELD: oil and gas industry.SUBSTANCE: method of fuel processing to produce combustion gases in a single controlled flow, creating four successive areas, in the first area fuel pyrolysis is ensured, and the start of the solid residues gasification begins; in the second area gasification is completed by increasing of the process intensity, and the vortex flow of the gas suspension passes to the area of conditioning, where by time holding and correcting air supply the necessary properties of the gas suspension are ensured, then the gas suspension by a special method passes to the stabilisation area, which ensures the stability of parameters of the gas suspension by the mutual compensation of pulsations of the gas suspension in the third and forth areas, by time holding and correcting the supply of air and/or steam to the first and forth areas of the vortex flow. Wherein ash circulation is performed through the entire vortex flow from the stabilisation area to the first area of pyrolysis and further through all areas of the vortex flow. The reactor for fuel processing forming the vortex flow in the first chamber and transforming in three successive chambers, and implementing in full scope the suggested method together with the use of heat of the reactor walls for heating of air feed to the reactor equipped with devices for ash transportation from the forth chamber to the special prechamber of the first chamber with a possibility of removal of these chambers ash partially or completely via gathering in a special accumulating tank.EFFECT: invention controls fuel pyrolysis and gasification, and its combustion, and facilitates more complete recycling of the process heat and burning-out of the ash combustion substances, as well stabilisation of the necessary parameters of the produced gas and ash of the fuel at the reactor output.5 cl, 8 dwg
FIELD: machine building.SUBSTANCE: centrifugal separator contains a carrying structure, a rotor made with a possibility of rotation in the carrying structure around the axis of rotation, and forming within its limits a separating space, in which multiple separating plates are installed, they pass from a radial external area to a radial internal area of the separating space. The centrifugal separator contains an inlet, made with a possibility of product feed in the form of a fluid to be separated in the separating space. Wherein the separator is configured such that the separating space is connected with the inlet by pressure during the normal operation of the centrifugal separator. The separator includes the first inlet passing from the radial internal area of the separating space to release the first phase of the product, having lower density, the second inlet passing from the radial external area of the separating space, for the periodic release of the second phase of the product, having larger density, and a release control system, made with a possibility to initiate opening of the second release if initiation is provided. The release control system contains a transmitter, made with a possibility of determination of an input pressure and/or input flowrate of the product in the form of a fluid. The initiation condition is linked with the input flow decreasing due to the input pressure, indicating flow resistance increasing downstream the inlet. The method of the periodic release control of the centrifugal separator contains stages of pressure registration at the inlet of the centrifugal separator, flowrate determination of the product in the form of the fluid supplied to the centrifugal separator, initiation of the second release opening to release the second product phase, during the registration of the initiation condition linked with the reduced flowrate of the product in the form of the fluid linked with the input pressure.EFFECT: improved indication of a sludge level to ensure timely sludge release from the separating space with minimum breaching of the separation process due to the termination of the release process.14 cl, 5 dwg
FIELD: machine building.SUBSTANCE: gas separator of vortex type contains a vertical cylindrical casing, divided by the horizontal partition to top and bottom chambers, top and bottom heads, separation elements, input, output and drainage ducts, deflector, gas sampling element and confusor. In the top chamber the separation element is located horizontally, and in bottom - vertically. Each separation element is made in form of a spiral with winding pitch reducing from periphery to centre out of thin flat plate with fins, located through the plate width outside the spiral, wherein width and shoulder of the fin are similar in terms of size from 3 to 5 mm, and distance between the adjacent fins is higher by order, wherein the first fin is located at distance at least 10 mm from the plate edge, and after each fin though the plate width a row of elongated holes is made, the holes made separation channels. The end face of the vertical separation element is welded to the horizontal partition, on it in the top chamber the confusor is installed, it is made in form of the hollow truncated cone, top base of the cone coincides and is welded to the external surface of the horizontal separation element, its axis is perpendicular to axis of the output duct. In the confusor a gas sampling element is installed, in the partition under the confusor a central holes and holes with inserted pipes for gas flow are made, outside the confusor in the partition the holes are made with inserted drain tubes, their length is beyond the vertical separation element, the same tube is inserted in the central hole under the confusor. The input duct is located eccentrically to the casing centre, the eccentricity is 1/3 of internal diameter of the input duct. In the input duct the confusor in form of the truncated cone is installed, and to the separation element the deflector is welded against the input duct. On end faces of the horizontal element the deflectors are welded, opposite to the input duct on the casing the level gauge is installed. The drainage duct has valve.EFFECT: effective separation of suspended moisture droplets and fines of the mechanical admixtures from gas/liquid flow.2 cl, 1 dwg
FIELD: machine building.SUBSTANCE: system includes gas supply pipelines, first and second vortex dust arresters with opposite vortex flows, two exhaust fans to remove cleaned gas from each dust arrester separately, separators-concentrators for cleaned gas supply to dust arresters by two flows: with higher dust concentration - to top tangential input of secondary flow; with lower dust concentration - to bottom axial entry of primary flow. The dust arresters in the cleaning system are arranged in series, at that the second dust arrester has lesser dimensions and capacity. In the axial output branch of the cleaned gas of the first dust arrester an axial cylindrical separating branch is installed, it ensures separation of removed cleaned gas to axial dedusted part 0.75-0.80 of total flow, removed by additionally installed exhaust fan of the first dust arrester to atmosphere, and peripheral with maximum concentration of fine dust particle 0.25-0.20 of total flow, supplied for cleaning to the second dust arrester. The separators-concentrators are installed upstream the both dust arresters.EFFECT: reduced power consumption for dust catching, and increased efficiency of dust cleaning of removed gases.1 dwg
FIELD: process engineering.SUBSTANCE: invention relates to product processing by phase separation. Continuous processing of vegetable or animal oil or fat by separation into two liquid phases, preferably, with extra removal of solid particles comprises the steps that follow. a) The product is processed in the centrifuge composed of the separator including the revolving drum accommodating the stack of troughs with lifting channels and provided with the product feed means and at least two gripping members for discharge of more dense and less dense liquid phase from the drum. Besides, there are solid phase discharge holes designed to form the area of separation between the leas dense and more dense phases (HP, LP). Note here that b) when the viscosity of denser liquid phase exceeds at least one threshold magnitude, more dense liquid phase discharge radius being adjusted.EFFECT: continuous discharge of denser phase when the content of denser phase is smaller than that of solid phase which allows the increase in its viscosity in time moment which cannot be defined with sufficient validity.7 cl, 2 dwg
FIELD: process engineering.SUBSTANCE: invention relates to product processing by phase separation. Claimed process of phase separation in at least two phases with additional removal from solid phase includes the steps that follow. The product is processed in continuously operated centrifuge composed of the separator including the revolving drum with vertical shaft, the stack of separation troughs with vertical channels, product feed tube and at least two separation elements for diversion of easier liquid phase and heavier phase from the drum, and the solid phase discharge holes. Note here that the separation zone is formed between the easier and heavier liquid phases (HP, LP) in the centrifuge. Said LP is discharged continuously from the drum while HP is discharged intermittently. Note here that for intermittent discharge of HP said separation element is displaced through different radii.EFFECT: continuous discharge of heavier phase.9 cl, 2 dwg
FIELD: machine building.SUBSTANCE: invention relates to centrifugal separator. Centrifugal separator contains frame with spindle and centrifugal rotor enclosing the separating space, at that the rotating part is supported by the frame with possibility of rotation around the axis of rotation, drive element made with possibility to rotate the rotating part, inlet channel and at least one outlet channel. Inlet channel is made with possibility to ensure connection by fluid in separating space, and contains rotating part of the channel, secured to the centrifugal rotor, frame part of channel secured to frame, and seals ensured at border between the rotating part of the inlet channel and frame part of inlet channel. Outlet channel is made with possibility to ensure connection by fluid from separating space, and contains rotating part of the channel, secured to the centrifugal rotor, frame part of channel secured to frame, and seals ensured at border between the rotating part of the inlet channel and frame part of outlet channel. At that the inlet channel and outlet channel are located near and concentrically to each other, and forced methods for leak flow generation through some seals in first direction from the outlet channel to inlet channel are provided, such excluding leak in opposite direction from inlet channel to outlet channel.EFFECT: increased efficiency of separation, and leaks prevention of product supplied to the separating space, to separated product exiting the separating space, thus ensuring low content of admixtures in separated product.15 cl, 9 dwg
FIELD: process engineering.SUBSTANCE: invention can be used in ferrous and nonferrous metallurgy, chemical industry, food industry, production of construction materials, etc, where cleaning of gases or air from dust is required. This method comprises feed of contaminated gas or air into cyclone-type bag filter, into its top part. Note here that flow fed to filter case top part is swirled downward for coarse cleaning at case bottom. Then, said flow is fed to filter bags for fine cleaning of gas or air. Thereafter, cleaned gas or air is withdrawn from bag filter for filter bags to be cleaned in turns. Contaminated gas or air is fed into said case, in between screen flexile membrane outer surface and case top part wall inner surface. Note here that gas flows are swirled. Larger volume of gas or air is fed to filter bags via membrane screen meshes for further fine cleaning with the help of filter bags. Filter bags are flushed either all at a time or only their parts are flushed, Dust is removed from screen membrane by exciting it to oscillations by gas or air flow. Dust is removed from filter case top part inside by gas or air flow.EFFECT: longer life of filter bag cloth, power saving for flushing.2 cl, 3 dwg