Separation of solid particles from gas flow

FIELD: process engineering.

SUBSTANCE: invention is intended for separation of solid particles from gases. Proposed process comprises the steps that follow. Catalyst is recovered in regenerator and solid particles are separated in the first and second stage cyclones. Gas flow is forced from second stage separator into third stage external separator. Gas flow is directed from said external separator into cyclone recycling unit to get a clean gas flow. Solid particles are charged to cause their agglomeration in said recycling unit. In implementation of this process, extra flow is fed from cyclone recycling unit into third stage external separator. Another flow is fed therefrom into the filter. Separate gas flow derived from the filter is fed into offgas heat recovery system and, then, into chimney. Additional flow from cyclone recycling unit is fed into the filter. DC electric field is created in said cyclone recycling unit.

EFFECT: higher quality of gas cleaning.

10 cl, 2 dwg, 2 tbl, 1 ex

 

This application claims priority of patent application U.S. No. 13/018510, the filing date is 01.02.2011.

The technical field to which the invention relates

The invention relates to a method for separating small solid particles from a gas stream.

The level of technology

Industry standards reduce installed them the amount of particulate matter emitted into the environment. Often the flow of the discharged gas, such as gaseous products of combustion (flue gases) contain solid particles. These standards require reducing the amount of particulate matter emitted in streams to improve the quality of the environment.

Often to reduce the harmful emissions of particulate matter using the systems with cyclones. In systems with efficiency cyclones for particulate control can be a function of particle velocity and distribution of solid particle size (which here in abbreviated form may be written as "PSD"). The more the average particle size of the solid phase contained in the exhaust gas stream, the greater the efficiency of collection systems cyclone. Typically, the exhaust gas stream may contain solid particles with size in the range from 30 to 40 microns with an average particle size less than 10 microns. In General, the solid particles of smaller size may be more difficult when one uses�the stripes of the existing technological equipment, such as the external third stage separator, which is often used together with one or more cyclone stages. Therefore, these systems can not meet new environmental standards and technical regulatory requirements, which require lower emissions of particulate matter. In this regard, it is desirable to improve the existing system to ensure gas emissions, characterized by lower content of solid particles, especially smaller particles that are more difficult to separate from the gases.

Disclosure of the invention

One example embodiment of the invention may be a method for separating solid particles from a gas stream. This method may include the regeneration of the catalyst in the regenerator, the separation of the solid particles in the cyclone first and second stages, the direction of gas flow from the separator of the second stage in the external third stage separator and direction of the gas stream from the external third stage separator to a cyclone recirculator to obtain a purified gas stream.

Another example embodiment may be a method for separating solid particles from a gas stream. This method may include the regeneration of the catalyst in the regenerator, the separation of the solid particles in cyclones the first and/or second stage, and the direction of gas flow from the cyclone of the first and/�whether the second stage external to the separator stage. The specified external separator stage may include a housing, in turn, contains an inlet for receiving a gas stream, a first outlet for cleaned gas stream and a second outlet for separated solid particles. Usually, in case there is an electric field between said inlet and at least one cyclone.

Another example embodiment may be a method for separating solid particles from a gas stream. The method may include the regeneration of the catalyst in the regenerator, the separation of the solid particles in cyclones the first and/or second stage, the direction of gas flow from the cyclone of the first and/or second stage of the separator of the external degree and the direction of gas flow from the separator external stage in cyclone recirculator. Specified cyclone recirculator can create an electric current density of less than 0.1 mA/m2to obtain a purified gas stream and a gas stream containing solid particles. This additional gas stream can be routed to the external separator stage.

Disclosed here, embodiments may provide for the removal from the stream of solid particles of a smaller size, it can be difficult to remove from the gas stream in traditional systems division third St�interest. In particular, in the here described embodiments of the invention may be used a device that electrostatically charges the particulate matter and at the same time uses centrifugal force to separate solid particles and directions to the place of their accumulation. In particular, the device can aggregate the solid particles and separating them in the same tank for increasing the efficiency of collecting particles and reduce system cost. Generally, such a device is especially effective for trapping particulates smaller than 10 microns.

In one example embodiment of a cyclone recirculator using a combination of electrostatic and centrifugal forces, can agglomerate and collect solid particles contained in the gas stream. Taken together the solid particles can then be directed into the external third stage separator. In this case, from the cyclone recirculator can be obtained purified exhaust gas and directed to the heat recovery system exhaust gas, for example in a heat exchanger for utilization of their thermal energy and discharging into the chimney.

In another example embodiment of a third stage separator may be provided with a number of small electrical wires located around the reservoir for generating electrostatic charges sintering TVE�the gut particles. With the passage of the charged solid particles down these particles can glomerulitis with enlargement to the formation of lumps of solid particles of larger size, and then they can be collected and removed.

Definition

As used herein, the term "stream" can include various hydrocarbon molecules and/or other substances, such as gases, e.g., hydrogen, carbon dioxide, carbon monoxide and oxygen or impurities such as heavy metals, sulphur compounds and nitrogen. In addition, the flow may include one or more phases, for example disperse system. One example of a stream may include a stream containing gas and solid phase, such as aerosol.

Used here, the term "milligrams per normal cubic meter" can be abbreviated listed as "mg/Nm3".

The line shown in the flowchart presented in the figures, can interchangeably be described as, for example, lines, pipelines, raw materials, products, effluent, fractions, parts or streams.

As used herein, terms such as "particle", "solid particles", "particles of the solid phase" may be used interchangeably.

Brief description of the drawings

Fig.1 is a schematic representation of an example embodiment of the installation for carrying out catalytic cracking with pseudouridine� layer with an external third stage separator and cyclone recirculator.

Fig.2 is a schematic cross-sectional view of the exemplary embodiment of the external third stage separator, which created the field of electrostatic charges to improve the efficiency of collecting particulate matter.

The implementation of the invention

Setting 100 for carrying out the cracking process in the fluidized bed of the catalyst (hereinafter, the process can be named as "FCC") may contain the reactor 120, the regenerator 200, the outer separator 400 of the third step, the cyclone recirculator 500 and the filter 550. Typically, the reactor 120, the regenerator 200 and the separator 400 of the third step can be any suitable apparatus, such as described, for example, in patent document US 7048782 B1.

In the present example embodiment, the reactor 120 may include a lift-reactor 130, the cyclone reactor 140, and a zone 150 of steaming. Typically, the reactor 120 contains an internal chamber 160. In addition, the regenerator 200 is connected to the discharge riser 180 that serves for supplying spent catalyst to the regenerator 200 and the regenerated catalyst from the regenerator 200 is transported in the lower part of the Elevator-reactor 130 via a lead riser 190 for the regenerated catalyst.

The regenerator 200 may contain a cyclone separator 210 first-stage cyclone separator 220 of the second stage, the outlet tube 230 and the dispenser 250 air. Usually regen�operator 200 includes an internal chamber 240. Although the figure shows the cyclone separator 210 of the first stage and the cyclone separator second stage 220 may be used any suitable number of stages of cyclones. Usually cyclone separator 210 of the first stage and the cyclone separator second stage 220 is placed inside the housing of the regenerator 200. Cyclone separator 210 of the first stage and the cyclone separator 220 of the second stage are used for separating the gases of combustion away from them flow of the catalyst. Although the separator 210 of the first stage are often used sequentially connected to the separator 220 of the second stage, can be used only one separator 210 or 220.

External separator 400 of the third step may include a reservoir 410, enclosing one or more cyclones 420, and can be named as the separator 400 of the external degree, unless the degree is 210 or 220 performs the separation. Usually the gases are fed into the external separator 400 of the third step, and the result of the action of centrifugal force, a large portion of solid particles out of the bottom of the tank 410, while the gases can be removed from the side of the tank 410. Usually from the reservoir 410 overlook two threads, while the bottom stream contains keen on them solid particles of larger size, and the flow coming from the side of the tank 410, contains keen on them solid particles less�size.

Cyclone recirculator 500 may represent a uniflow cyclone, acting as a hub, electrically charged with the electric power source of direct current of high voltage. Usually cyclone recirculator 500 comprises a source 504 electric energy of direct current and a number of electrical wires 506, wherein at least some or part of the wires 506 may be arranged in parallel and to generate the electric field are, at least along part of the length or height of the cyclone recirculator 500. The example of cyclone recirculator 500 is described for example in patent document WO 2008/147233 A2. The voltage can be applied to the corona electrode, the diameter of the corona electrode and its distance from the wall of the hub can be selected to generate an electric field to obtain a current density of less than 0.1 mA/m2. Characteristics of this cyclone recirculator 500 are shown below in table. 1.

Table 1
The distance between electrodes (mm)The average value of electric field intensity (V/m)Current density (mA/m2) Migration velocity of particles with a diameter of from 0.1 to 10 microns (m/s)
from 450 to 600<20,000<0.1from 0.01 to 0.05

Cyclone recirculator 500 can be oriented essentially horizontally or vertically. In the present example embodiment, the orientation of the cyclone recirculator is essentially vertical. The capture of solid particles in the cyclone recirculator 500 can be minimized or preferably completely absent. Flow in the electrostatic field helps to remove particles from the surface of the outlet, located on the vertical axis of the cyclone recirculator 500, and as a result of the action of this field of solid particles close to the walls of the cyclone recirculator 500, but do not build up on the walls. Therefore, the solid particles can glomerulitis immediately after the release and can be returned to the external separator 400 of the third degree. The efficiency of the recycling process can be enhanced by creating in the cyclone recirculator 500 electric field of direct current sintering of solid particles, provided that the discharge and accumulation of particulate matter calculated so that the cyclone recirculator 500 could not act as e�chromaticism precipitator. The difference between the cyclone recirculator 500 and an electrostatic precipitator is shown, for example, in patent document WO 2008/147233 A2.

The filter 550, which may be a filter with a lower exhaust flow, can communicate with an external separator 400 of the third degree. Usually the 570 piping transports the stream containing the solid particles and the tubing 560 conveys a separate thread 560 gas containing one or more different gases. Typically, specified a separate thread 560 gas has a sufficiently low content of particulate matter, less than 10 mg/Nm3, preferably less than 5 mg/Nm3and may be referred to a system of heat recovery of exhaust gas and then into the chimney.

Setting 100 for carrying out catalytic cracking fluidized bed may contain one or more constriction the Venturi 310, 450 and 540. The first narrowing of the Venturi 310 can provide recycling disperse system in the pipeline 520. In particular, the narrowing of the Venturi 310 may act as an ejector that uses the fluid within the pipeline 300 as the driving environment. The second Venturi constriction 450 and used at the discretion of the narrowing of the Venturi 540 can be used to control mass flows coming from the outside of the separator 400 of the third stage and cycloneuralia 500 respectively.

Usually narrowing Venturi 450 and 540 regulate the mass flow rate in the pipes 440 and 530, respectively, in the range from 3 to 5 wt.%, based on the total flow emerging from the external of the separator 400 of the third stage and cyclone recirculator 500 respectively. Usually flows in pipelines 440 530 and already minimized sufficiently to allow the passage of solid particles. In the alternative, for contractions Venturi 450 and/or 540 may be used one or more control valves.

During operation of the reactor 120 can typically do a hydrocarbon feedstock 110 containing one or more hydrocarbons supplied to the Elevator-reactor 130. The bottom of the Elevator-reactor 130 can be summed up siaosi gas 114 to permit movement of the catalyst from the riser 190 for the regenerated catalyst up in the Elevator-reactor 130. One or more hydrocarbons and catalyst can be mixed with hydrocarbons, reacting in the Elevator-reactor 130. In General, the reaction products can be separated from the catalyst at the exit of the Elevator-reactor 130 within the housing 120 of the reactor. Typically, the catalyst falls down in the direction of the zone 150 of steaming, while the reaction products entrained with the catalyst, can come into the cyclone reactor 140. As a rule, the reaction products can record�ü in the chamber 160 and to leave it in the form of one or more Krekorian light hydrocarbons, contained in the flow of 170.

The catalyst in zone 150 steam can pass through the discharge riser 180 for spent catalyst in the regenerator 200. Gas burning, usually air, may be directed into the dispenser 250 to burn off coke deposits on the catalyst surface. At the discretion of the regenerator 200 via the conduit 260 may be inserted fresh catalyst. Gases and the catalyst can be used up, and the regenerated catalyst may fall down and enter the riser 190 for the regenerated catalyst. The exhaust gases mixed with solid particles can enrol in a first step 210 of the cyclone. A portion of the catalyst may fall into the riser 190 for the regenerated catalyst, while the gases can be transported through the channel 214 in the second step 220 of the cyclone. In addition, the regenerated catalyst may pass through the lower part of the regenerator and to fall towards the bottom of the regenerator 200, while the gases may pass upward through the outlet 230, usually through the exhaust pipe, into the inner chamber 240. Although most of the catalyst and other solid particles separated from the exhaust gas in the regenerator 200, some of the particles may still be entrained in the stream of exhaust gases. Generally, the exhaust gas with the solid phase may have a concentration�th solid phase in the range from 80 to 1000 mg/Nm 3and more preferably from 300 to 500 mg/Nm3. Typically, the solid particles in the exhaust gas can have a distribution given below in table. 2.

Table 2
Size (µm)Mass percent, was obtained based on the weight of solids
TotalExample
0-4from 1 to 9040
4-8from 1 to 908
8-15from 1 to 9023
15-30from 1 to 9025
>30from 1 to 904

The size distribution can vary greatly depending on the scheme of the installation is higher in the direction of flow, operating parameters, catalyst, or other additives.

The pipeline 300 may communicate or to connect the regenerator 200 with an external separator 400 of the third degree. In the example embodiment of�walking gas can pass from the regenerator 200 to the external separator 400 of the third degree. The exhaust gas can be supplied into the outer separator 400 of the third stage through the inlet 414 and pass through the cyclones 420. Solid particles of larger size can be separated from the waste gas and go from the outside of the separator 400 of the third stage in the form of another thread 440. The pipeline 430 may inform the external separator 400 of the third stage with cyclone recirculator 500. Generally in this pipeline is the exhaust gas having a large portion of particulate matter smaller than 10 microns. The intensity of removal of solid particles from the outside of the separator 400 of the third step may be a function of particle size.

In most cases, the most difficult to remove from the stream of solid particles of a size less than 10 microns. Usually all solid particles sized 10 microns or more can be separated by using an external separator 400 of the third stage and then adsorbed by the filter 550. Typically, the solid particles of smaller size, which were not separated in the external third stage separator may be directed to a cyclone recirculator 500 for further processing. Generally in the cyclone recirculator 500 can be obtained purified gas stream discharged through conduit 510, and the additional flow in the pipe 520, which contains solid particles. The purified gas stream 510 before being exhausted through the flue Tr�control unit can be sent to the system heat recovery of waste gas for removal from it of warmth. Usually an additional stream 520 contains solid particles larger than 10 µm, since the solid particles smaller glomerida in the cyclone recirculator 500. In the cyclone recirculator 500 can be obtained purified gas stream 510, having a concentration of solid particles not more than 50 mg/Nm3preferably not more than 10 mg/Nm3. Added into the diagram of the apparatus 100 FCC cyclone recirculator 500 total efficiency gross may increase from 60% to 95%. Additional stream 520 may be supplied to the first Venturi constriction 310 and may then be returned to the external separator 400 of the third degree. Alternatively, the incremental flow 530, or instead of, or in addition to the additional flow 520 may pass through the Venturi constriction 540 and then can be routed directly to the filter 550. In another case, another thread 440 extending from external of the separator 400 of the third step, can be transported through the second Venturi constriction 450, and/or an additional stream 530 may be sent to the filter 550. Generally the filter 550 can catch most of the solid particles flowing in the external separator 400 of the third step, by concentrating the solids in the conduit 570 for their removal and disposal. Upper gas stream 560 coming out of the filter 550 may be directed to the system of waste heat from�tamago gas and then into the chimney.

Fig.2 shows another variant of the external separator 600 third stage in another example embodiment of the invention. In this example embodiment, the external separator 600 third stage can replace the external separator 400 of the third stage and the cyclone recirculator 500 shown in Fig.1.

Generally external separator 600 third stage may include a housing 610, covering the dispenser 624 and at least one cyclone, as a rule, a number of cyclones 642, 644, 646 and 648. In this example embodiment, the orientation of the separator is essentially vertical 670, and the gas stream from the regenerator 300 200 can be routed directly to the inlet 620 of the outer separator 600 third stage. The gas may be distributed over the whole body 610 with the valve 624. The 634 source of electric current, generating, for example, DC may be connected to one or more electrical wires 630 to generate an electric field within the housing 610. The electric field can be created by using the number of electric wires stretched across the housing 610 through which an electric current flows. Electric current can create a field that charges the solid particles, leading to their agglomeration. For agglomerating solid particles can be selected to be any suitable current density.

Took�an increase in size of the solid particles can improve the collection efficiency of the external separator 600 third stage. Such electric fields can be created upstream from the cyclone, described for example in patent document US 4718923. Agglomerated solid particles can enter the cyclones 642, 644, 646, and 648, and can be concentrated in the second the outlet port 660. From the second outlet 660 concentrated in the particles can be directed into the filter 550, as shown in Fig.1. From the first outlet port 650 may extend the purified gas stream, which, essentially, may not contain solid particles, in particular less than 10 μm. The purified gas stream can be routed to a recovery system waste heat and then into the chimney.

The example of the incarnation

The following example is a further illustration of the discussed embodiments. This illustrative example of an embodiment of the invention is not intended to limit the claims to the specific details of this example. The example is based on engineering calculations and experience of carrying out similar processes.

If the gas flow 300 (Fig.1) has a loading of solids 400 mg/Nm3and a typical distribution of particle sizes shown in table. 2, the concentration of particulate matter in the cleaned gas stream 510, abstracted from the cyclone recirculator 500 can be as low as 20 mg/Nm3. At the same time in the stream 430 is processed only in the external separator 400 of the third step, the concentration of particulate matter can reach 160 mg/Nm3. Some rules of stack emissions require for the protection of the environment, the concentration of solid particles in the flow was less than 50 mg/Nm3.

It is considered that the person skilled in the technical field without conducting an additional study and research, using the above description of the invention, may use the invention in its greatest fulness. The preceding preferred specific embodiments it should be understood, therefore, only as illustrative, not limiting in any way the rest of the description.

In the above description, all temperatures are given in degrees Celsius, and all shares and percentages by weight, unless otherwise indicated.

From the above description, the specialist in the art can easily set the essential features of the invention, without going beyond the scope and essence of the invention can make various changes and modifications of the invention to adapt it to different conditions and applications.

1. Method for separating solid particles from a gas stream, in which
(A) regenerated catalyst in the regenerator;
(B) separating the solid particles in the cyclone first and second stage,
(C) direct the gas stream from the second separator speed� in the external third stage separator;
(D) direct the gas stream from the external third stage separator to a cyclone recirculator to obtain a purified gas stream; and
(G) charging the solid particles and cause their agglomeration in the specified recirculator.

2. A method according to claim 1, wherein optionally send additional stream from the cyclone recirculator to the external third stage separator.

3. A method according to claim 1 or 2, which additionally serves another stream from the external third stage separator to the filter.

4. A method according to claim 3, which additionally provide a separate gas stream withdrawn from the filter, to the waste heat recovery system waste gas and then into the chimney.

5. A method according to claim 4, which further directs the solid particles from the filter to remove them.

6. A method according to claim 1 or 2, which additionally send an incremental stream from the cyclone recirculator to the filter.

7. A method according to claim 2, which further pass the additional flow, abstracted from the cyclone recirculator, through the Venturi constriction before it is input into the external third stage separator.

8. A method according to claim 6, which additionally missing the extra flow, abstracted from the cyclone recirculator, through the Venturi constriction before it is fed to the filter.

9. A method according to claim 3, which additionally missing the specified other�Oh the thread abstracted from the external third stage separator, through the Venturi constriction before it is fed to the filter.

10. A method according to claim 1 or 2, wherein in the cyclone recirculator create an electric field of direct current.



 

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EFFECT: the invention ensures increased efficiency and reliability of the dust catching process and also decreased metal consumption and vibroacoustic activity of the cyclone separator as a whole.

14 cl, 2 dwg

Cyclone // 2257959

FIELD: chemical industry; textile industry; food industry; light and other industries; equipment to cleanout of dusty gases.

SUBSTANCE: the invention is pertaining to equipment of dust separation and can be applied in chemical, textile, food, light and other industries to cleanout of dusty gases. The cyclone contains a body consisting of cylindrical and conical parts, a peripheral inlet of a gas stream and made in the form of an inlet branch pipe and an exhaust device containing an outlet pipe for withdrawal of the purified gas, the upper and the lower bodies with a placed in them internal barrel and a water header and a grain pipe. At that in an exhaust pipe there are a splitter and a filtering element consisting of parts, which are formed by the exhaust pipe and the splitter disposed. The technical result is increased efficiency and reliability of the dust trapping process and also decreased metal consumption and vibration activity of the apparatus as a whole.

EFFECT: the invention ensures an increased efficiency and reliability of the dust trapping process, decreased metal consumption and vibration activity of the apparatus.

9 cl, 3 dwg

FIELD: agriculture, in particular, processing of cereal products.

SUBSTANCE: method involves inertial settlement of heavy particles followed by process of inertial settlement of light particles; before settlement of light particles, spraying water in dust-and-air flow and introducing finely-dispersed bone flour particles, said bone flour adhering onto moistened outer surface of light particles to thereby increase weight of said particles and separate the latter from said flow for further utilization in feed production. Apparatus has two inertial dust catchers arranged in succession. Bins with closures are located in lower part of each of said dust catchers. Ejector with water spraying head and bone flour spraying bin with closure are located in air duct, in front of second dust catcher.

EFFECT: increased efficiency in purifying of dust-and-air flow and provision for obtaining of crude material for producing of combined feeds.

3 cl, 1 dwg

Acoustic cyclone // 2268090

FIELD: chemical industry; textile industry; food industry; light and other industries; dust trapping equipment for purification of dusty gases.

SUBSTANCE: the invention is pertaining to dust trapping equipment, in particular, to the acoustic cyclones and may be used in chemical, textile, food, light and other industries for purification of the dusty gases. The acoustic cyclone contains; a body consisting of a cylindrical and a conical parts; located in its upper part a peripheral inlet of a gas stream and an axial outlet branch pipe of the purified gas, a an acoustic column. The lower part of the acoustic column is connected to the axial outlet branch pipe of the purified gas and contains a conical deflecting washer mounted with its great base on the lower base of the acoustic column. The vacuity formed by the surfaces of the deflecting washer and the column is linked through a bypass tap to the peripheral inlet of a gas stream. At that in the upper art of the acoustic column there is the outlet branch pipe of the purified gas and the acoustic oscillations generator coupled to a control unit. The technical result is an increased effectiveness of dust trapping.

EFFECT: the invention ensures an increased effectiveness of dust trapping.

2 cl, 2 dwg

FIELD: chemical industry; textile industry; food industry; light industry; other industries; dust trapping equipment.

SUBSTANCE: the invention is pertaining to the dust trapping equipment, in particular, to the vibroacoustic cyclone and may be used in chemical, textile, food, light and other industries for purification of the dusty gases. The cyclone contains the body consisting of the cylindrical and conical parts, the peripheral inlet of a gas stream allocated in upper part of the body, the axial outlet branch-pipe of the purified gas, the generator of the acoustic vibrations, the vibration exciter, the acoustic column. The lower part of the acoustic column is connected to the axial outlet branch-pipe of the purified gas and contains the conical deflecting washer installed by its greater base on the lower base of the column. The vacuity formed by the surfaces of the deflecting washer and the column is linked by a bypass piping to the circumferential inlet of the gas stream. In the upper part of the acoustic column there are the purified gas outlet branch-pipe and the generator of vibrations connected to the control unit. Fixation of the body conical section to the cylindrical part is realized by means of a resilient flange, and in the lower part of the body there is a fixed ring spring-loaded in respect to the base or the foundation by a resilient component, above which the generator of vibrations is fixed. The technical result of the invention is the increased effectiveness of the dust trapping by the vibroacoustic cyclone.

EFFECT: the invention ensures the increased effectiveness of the dust trapping by the vibroacoustic cyclone.

2 cl, 2 dwg

FIELD: agricultural reclamation; installations for water purification used in drip irrigation.

SUBSTANCE: the invention is pertaining to the field of agricultural reclamation, in particular, to installations for water purification used in the systems of drip irrigation and may be used for water purification at irrigation of the vegetable crops, vineyards, gardens, forest nurseries, fruit- berries and vegetable crops and other plantings. The installation for water purification used mainly in the systems of drip irrigation contains: a horizontally mounted filled with the filtration material tight container; the upper and the lower distribution systems for water delivery from a reservoir and for withdrawal of the purified water accordingly; a network for withdrawal of the pollution products; the two-position dispenser of the water streams, which body is hydraulically connected by the branch-pipes with the upper and the lower water distribution systems; a network for withdrawal of the pollution products; the in series mounted at the inlet and the outlet of the hydraulic network cyclones, in the cavities of which there are self-clearing screen filters. The bottom parts of the bodies of the cyclones are connected to the pollution collectors. The technical result of the invention is reduction of the products cost price, an increase of the installation operational reliability and reduction of labor input for maintenance of the installation.

EFFECT: the invention ensures reduction of the products cost price and labor input for maintenance of the installation, increased operational reliability of the installation.

5 dwg

FIELD: apparatus using free vortex flow.

SUBSTANCE: recuperator comprises housing made of cylindrical and conical members, fan motor, fan, air duct, and hopper. The motor of the fan is mounted in the top part of the housing above the fan, and output shaft of the fan faces the motor to define the connection with the fan. The inlet branch pipe of the fan faces the air duct to define connection. The air duct has inlet port which is the outlet port of the chamber. The housing of the fan motor and hopper are detachable and can be made of aluminum.

EFFECT: simplified cleaning.

1 cl, 2 dwg

FIELD: grain cleaning equipment, in particular, stone separating machines with recirculation of main air flow, may be used in milling and groats producing industry for cleaning of grain from mineral mixture.

SUBSTANCE: stone separating machine has housing incorporating working deck, sucking collector located in upper part of housing and pressure collector located in lower part of housing, feeding and distributing apparatus, motor-vibrators for imparting vibrations to housing, and air recirculation system. Recirculation system consists of settling device for carried-away material, radial fan, and sluice gate for discharging of carried-away material, and is connected to housing upper and lower parts through air ducts. Settling device for carried-away material is made in the form of spiral settler with inlet and outlet branch pipes, settler horizontal branch pipe and cylindrical baffle-type grid, with horizontal branch pipe and baffle-type grid being arranged within settler. Inlet branch pipe of settler is connected to sucking collector of housing of stone separating machine. External branch pipe of settler is connected to sucking opening of radial fan, in axially aligned relation to baffle-type grid. Horizontal cyclone is connected to spiral settler via single horizontal slit. Horizontal cyclone consists of external housing and internal branch pipe. Cyclone internal branch pipe is connected via air duct to horizontal branch pipe of settler. External housing of cyclone is choked at the side adjoining air duct and is equipped with spiral arranged at opposite side and connected through gravity-flow pipeline with slice gate. Throttling device arranged within spiral of horizontal cyclone is made in the form of cone movable axially of horizontal cyclone for allowing slot between cone and internal branch pipe of cyclone to be adjusted. Pressure collector is equipped with air distributing rotating gates.

EFFECT: stabilized operation of stone separating machine with recirculation air flow owing to increased efficiency in catching of light admixtures within settling device for carried-away materials to thereby increase efficiency in separating of mineral admixtures.

3 cl, 2 dwg

FIELD: mechanical engineering; metallurgy; power industry; other industries; production of the devices for the air purification.

SUBSTANCE: the invention is intended for the air purification and may be used in mechanical engineering, metallurgy, power industry and other industries. The device contains the final fine filter, the fan and the dust-catcher. The final fine filter has the cylindrical body with the inlet tangential branch-pipe, the dust collector with the dust discharge mean, the filtering element is mounted inside the jacket with the outlet branch-pipe. The fan is rigidly fixed on the cover of the dust catcher, and its outlet branch-pipe and the inlet tangential branch-pipe of the cylindrical body of the final fine filter are rigidly linked among themselves for the short way of the passage from the fan into the body of the final fine filter of the solid impurities accumulated on the contour of the external boundary of the airflow under action of the centrifugal forces in the spiral of the fan and washing by this air flow contour of the internal wall of the cylindrical body of the final fine filter. The dust catcher has the cylindrical body with the inlet tangential branch-pipe connected with the dust collector, the cone with the relief valve, the covers with the hole and the conical nozzle located inside the cylindrical body. At that the cone of the nozzle passes through the hole in the cover of the dust catcher and enters the fan forming the fan inlet branch-pipe by the cone of the nozzle above the cover, and under the cover inside the cylindrical body of the dust catcher the nozzle forms the inertial chamber and settling chamber and the annular slit for passage of the thin layer of the polluted air flow between the external wall of the nozzle and the internal wall of the cylindrical body of the dust catcher. The device allows to separate multiply the solid impurities from the air flow and to trap them increasing the level of the air purification efficiency.

EFFECT: invention allows to multiply separate the solid impurities from the air flow and to trap them increasing the level of the air purification efficiency.

2 dwg

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