Chamber for heat and mass exchange between dispersed particles and gaseous medium

FIELD: heating.

SUBSTANCE: in a chamber for heat and mass exchange between dispersed particles and a gaseous medium, comprising a body with a cover, a vessel with porous walls installed inside the body concentrically to it, nozzles installed inside the vessel and a device for bleeding of the spent coolant with the porous working surface, equipped with a drive, and inside the vessel there are lattices fixed, between which there is a layer of an inert carrier filled, which increases efficiency of heat and mass exchange. To increase efficiency of operation of the inert carrier, at least two rods are connected to the rotary hollow porous cylinder, and their axes are parallel to the axis of the cylinder, and are at identical distance from its axis, and to each of rods at the angle of 45…90° there are additional rods attached, making it possible to intensify heat and mass exchange between coolant and dispersed material, according to the invention, the body of the nozzle is made with a channel for liquid supply and comprises a coaxial rigidly connected bushing, with a nozzle fixed in its lower part made in the form of a cylindrical double-staged bushing, the upper cylindrical stage of which is connected by means of a threaded joint with a central core, made of a cylindrical part and a coaxial conical socket installed with a circular gap relative to the inner surface of the cylindrical bushing, and the circular gap is connected at least with three radial channels made in the double-staged bushing, connecting it with the circular cavity, formed by the inner surface of the bushing and the outer surface of the upper cylindrical stage, besides, the circular cavity is connected with the channel of the body for liquid supply, at the same time to the conical socket, in its lower part, there is a receptacle rigidly fixed in the form of an end round plate with at least seven radial tabs, which are bent towards the circular gap between the nozzle and the socket, on the side surface of the socket there are at least two rows of cylindrical throttling holes, with axes lying in planes perpendicular to the socket axis, and in each row there are at least three holes, besides, in the end round plate there are at least three conical throttling holes with an angle near the top of the cone lying in the range of 45° - 90°.

EFFECT: higher efficiency of drying and tempering processes.

2 dwg

 

The invention relates to devices for heat and mass transfer processes mainly drying in suspension.

Closest to the claimed object to the technical essence is the camera on the patent of Russian Federation №2334181, F26B 3/12 intended for carrying out heat exchange between the liquid or solid particles and gaseous agent, executed in the form of a closed cylindrical vessel of variable volume with porous walls, and nozzles (prototype).

However, the use of a cylindrical receptacle of variable volume means of known construction to conduct heat and mass transfer of drops with continuous removal from the chamber of the heat carrier, which severely limits its performance and, accordingly, eliminates the possibility of use for the implementation of heat and mass transfer in industrial conditions in the spray drying.

The technical result is increased productivity by continuous withdrawal of spent coolant.

This is achieved in that in the chamber for conducting heat exchange between dispergirovannykh particles and the gaseous medium, comprising a housing with a lid, placed inside the housing concentric with him a vessel with porous walls located inside the vessel nozzle and a device for selection of spent coolant sporitel working surface, equipped with the actuator, and the inside of the vessel is fixed grille between which is filled with the inert carrier, which increases the efficiency of heat transfer, thus to improve the efficiency of inert carrier to the rotating hollow porous cylinder attached at least two pivot axes are parallel to the axis of the cylinder, and are at the same distance from its axis, and to each of the rods at an angle of 45...90° attached additional rods, allowing to intensify heat exchange between the heating medium and the dispersed material according to the invention, the nozzle is made with a channel for supplying a liquid and contains coaxially rigidly associated sleeve mounted in the lower part of the nozzle, made in the form of two-stage cylindrical sleeve, the upper cylindrical stage which are connected by threaded connection with a Central core consisting of a cylindrical part and coaxially with her conical socket set with an annular gap relative to the inner surface of the cylindrical sleeve, and the annular gap is connected, at least three radial channels made in the two-stage sleeve, connecting it with the ring cavity formed by the inner surface of the sleeve and the outer surface of the upper cylinder is nticeship stage, moreover, the annular cavity is connected with the channel of the housing for supplying liquid to the conical socket in its lower portion rigidly attached to the outlet end of a round plate with at least seven radial petals that are angled in the direction of the annular gap between the nozzle and the socket, on the side of the socket is made of at least two rows of cylindrical throttle openings with the axes lying in planes perpendicular to the axis of the socket, and each row is made at least three holes, and in the end a circular plate made, at least three conical throttle openings with the angle at the vertex of the cone lying in the range from 45° to 90°.

Figure 1 presents the scheme of the proposed camera, figure 2 - diagram of the injector.

In the housing 1 coaxially located vessel 2 with porous walls, forming a free space for uniform passage of fluid into the vessel 2. The housing 1 and the vessel 2 is cylindrical. Supply and discharge of coolant through the pipes 3 and 4. Feed particles or the dispersion liquid in the volume of the vessel 2 is carried out by means of the nozzle 5. Depending on the performance of the camera in an industrial environment, the flow of solid particles or liquid atomization can be performed multiple nozzles (nozzles) 5, R is Vomero spaced around the diameter of the vessel 2. Remove the dry product is carried out by opening a porous bottom 6, mounted in the lower part of the vessel 2 by means of a cover 7. The day of removal of the coolant from the volume of the vessel 2 is provided a rotating hollow porous cylinder 8 with a perforated (porous) bars 19 on the bottom. The cylinder 8 is connected via a shaft 9 driven 10. The cylinder 8 is half the length of its working surface displayed outside of the housing 1, i.e. his part inside of the vessel 2 and the cavity 11 between the top wall of the housing 1 and the top cover 12, are equal. This reduces hydraulic losses at the outlet of the coolant. Remove the finished product from the hopper 13 connected to the discharge pipe 14. Inside the vessel 2 is fixed grating 15 and 16, between which is filled with the layer of inert carrier 20, which increases the efficiency of heat exchange. To improve the efficiency of inert carrier 20 to the rotating hollow porous cylinder 8 is attached, at least two of the rod 17, the axis of which is parallel to the axis of the cylinder 8, and are at the same distance from its axis. Each of the rods 17 at an angle of 45...90° attached additional rods 18, allowing to intensify heat exchange between the heating medium and the dispersed material.

The nozzle (figure 2) comprises a cylindrical hollow body 21 to the cash 23 for supplying a fluid and coaxially, rigidly connected with the housing sleeve 22 mounted in the lower part of the nozzle, made in the form of two-stage cylindrical sleeve 24, the upper cylindrical notch 26 which are connected by threaded connection with a Central core consisting of a cylindrical part 27 and coaxial with her tapered socket 28 that is installed with the annular gap 29 relative to the inner surface of the cylindrical sleeve 24. The annular gap 29 is connected at least with three radial channels 25, made in a two-stage sleeve 24 that connects the annular cavity 34 formed by the inner surface of the sleeve 22 and the outer surface of the upper cylindrical stage 26, and the annular cavity 34 is connected with the channel 23 of the housing 21 for supplying a fluid.

To the conical socket 28 in its lower portion rigidly attached to the outlet end of a round plate 31 with at least seven radial petals 32, which are bent in the direction of the annular gap 29 between the nozzle and the socket. On the side of the socket is made of at least two rows of cylindrical throttle holes 30, with axes lying in planes perpendicular to the axis of the socket 28, and each row is made at least three holes 30. At the end of the round plate 31 is made of at least three konicek the x throttle openings 33 with the angle at the vertex of the cone, lying in the range from 45° to 90°.

The camera operates as follows.

The heat carrier with a predetermined temperature and humidity is supplied through the pipe 3 into the free space between the walls of the body 1 and the vessel 2, and also between the cover 7 and the porous bottom 6. Under the action of the pressure generated, for example a fan, coolant penetrates through the pores of the walls of the vessel 2 inside this vessel. There is heat exchange between the heating medium and the droplets or particles are continuously fed by means of spray nozzles 5. The settling of droplets or particles occurs on an inert carrier 20, and on the walls of the vessel 2 is prevented by organised ottowa them from the walls of the coolant flowing through the pores. Under the action of the above-mentioned pressure fluid also passes through a layer of inert carrier 20 that is located between the grids 15 and 16, as well as pores rotating hollow porous cylinder 8, and then enters into the internal volume and forth through the cavity 11 to the nozzle 4. Removing dry particles resulting from the evaporation is carried out when removing the cover 7, and accordingly, the porous bottom 6. In industrial conditions, the finished product is removed through the discharge pipe 14 connected to the hopper 13.

This camera can be used in a production environment for Bezu Osney drying in suspension, to avoid loss of the finished product. This camera will allow you to prevent pollution of the atmosphere.

Fluid under pressure is supplied into the cavity of the nozzle 21, and then flows in two directions: first, in the annular cavity 34 through the radial channels 25 in the annular gap 29 between the nozzle and the Central core. When the pressure at the input of more than 0.2 MPa, the liquid is dispersed on the outer conical surface of the socket 28 with the formation of the liquid film, which is not detached from the outer surface of the socket 28. The acceleration of the liquid in the conical surface is accompanied by a decrease in her static pressure and vaporization and release of soluble gases. This phenomenon is additionally prepares the liquid to fragment into small drops. When reaching the liquid flow counter currents flowing from the cylindrical throttle openings 30, multiple fragmentation of film formation of fine-dispersed phase.

The second direction, which supplies the fluid through the channel 23 for supplying a fluid into the cavity of the Central core, and then tapered socket 28 from which part of the liquid to expire at the end of the radial hole 30 and the conical part through the throttle hole 33. When this happens multiple crushing drip on the shackles of the fluid, flowing from the throttle hole.

The presence of gas inclusions in the liquid additionally resent its surface, which leads to volnoobrazovaniye and volumetric crushing of the liquid film. Loss of mechanical energy when external clocking (external conical surface) decrease compared with the same acceleration in a closed channel.

Luggage for carrying out heat exchange between dispergirovannykh particles and the gaseous medium, comprising a housing with a lid, placed inside the housing concentric with him a vessel with porous walls located inside the vessel nozzle and a device for sampling the exhaust of fluid from a porous work surface with the actuator, and the inside of the vessel is fixed grille between which is filled with the inert carrier, which increases the efficiency of heat transfer, thus to improve the efficiency of inert carrier to the rotating hollow porous cylinder attached at least two pivot axes are parallel to the axis of the cylinder, and are at the same distance from its axis, and each of the rods at an angle of 45...90° attached additional rods, allowing to intensify heat exchange between the heating medium and the dispersed material, characterized in that the nozzle is made with a channel for the supply of the LM the bone and contains coaxially rigidly associated sleeve mounted in the lower part of the nozzle, made in the form of two-stage cylindrical sleeve, the upper cylindrical stage which are connected by threaded connection with a Central core consisting of a cylindrical part and coaxially with her conical socket set with an annular gap relative to the inner surface of the cylindrical sleeve, and the annular gap is connected, at least three radial channels made in the two-stage sleeve, connecting it with the ring cavity formed by the inner surface of the sleeve and the outer surface of the upper cylindrical stage, and the annular cavity is connected with the channel of the housing for supplying liquid to the conical socket in its lower portion rigidly attached socket at the end of a round plate with at least seven radial petals that are angled in the direction of the annular gap between the nozzle and the socket, on the side of the socket is made of at least two rows of cylindrical throttle bores with axes lying in planes perpendicular to the axis of the socket, and each row is made at least three holes, and in the end a circular plate made of at least three conical throttle openings with the angle at the vertex of the cone lying in the range from 45° to 90°.



 

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Spraying drier // 2473853

FIELD: instrument making.

SUBSTANCE: spraying drier includes cylinder-conical drying chamber, cylindrical housing, conical cover plate and bottom, heat carrier supply air pipeline enclosing the drier housing on the outer side. Drag-type device with drive shaft is arranged at the bottom; outer side of the housing is provided with a duct with cyclones, the output of which is connected via air pipeline to the inlet of fans installed on the cover plate of drying chamber, and pressure lines of fans are connected by means of connection pipes to scrubber, in the upper part of which a header with atomisers is located and connected to supply pipeline and pressure pump; heat carrier is supplied from air heater via the line to the air duct to be further supplied to drying chamber. Drag-type device represents a lever with the centre connected to drive shaft and shoulders which are inclined and parallel to generatrixes of conical surface of the bottom. Drags made from the material that is inert in relation to the initial solution - suspension are rigidly attached to the lever arms, and the drying chamber bottom has an attached conical duct, in the lower part of which an additional drag-type device made in the form of a lever the centre of which is connected to drive shaft, is located; besides, its arms are horizontal and parallel to horizontal surface of conical duct bottom, in which finished product collecting bin is located, and vibrator is installed in lower part. Atomiser consists of cylindrical part with external thread for connection to the nozzle of distributing pipeline supplying the solution, suspension, conical transient part and cylindrical part with large size of diametrical section, and with internal threaded surface. A nozzle is fixed in lower part of housing coaxially to it; the nozzle is formed with cylindrical surface with external thread interacting with cylindrical part of housing. Besides, cylindrical surface of nozzle passes to conical surface and ends with an end blind partition perpendicular to the housing axis, with an orifice made in its centre, which is asymmetrical to the nozzle and consists of cylindrical and conical orifice holes connected in series. Larger diameter of conical hole is located on blind partition wall of the nozzle. Housing and nozzle form three internal cylindrical chambers that are coaxial to each other, and the nozzle, on the side that is opposite to the suspension solution supply, is provided with an additional row of orifices which are formed at least with three pairs of mutually perpendicular vertical channels for solution, suspension passage and horizontal channels, which cross on conical side surface of the nozzle and form outlet holes of each orifice; at that, pair channels are located at right angle to each other in longitudinal planes of the housing, and conical side surface of the nozzle is provided at an angle at the apex, which is equal to 90°.

EFFECT: improving the plant productivity by reducing the dried material sticking to drying chamber walls.

2 dwg

FIELD: power engineering.

SUBSTANCE: counterflow spray dryer comprises a cylindrical drying chamber with nozzles arranged on the upper level of the drying chamber, covering the lower level of the drying chamber from the outside, a gas duct in the form of a box with permanent cross section, separated into two compartments by a helical partition, the pitch of which is equal to the height of the box, a divider of a coolant flow arriving into the box into two flows sent into compartments into mutually opposite directions, gas-distribution grids at the coolant inlet into compartments, nozzles to supply coolant from compartments into a drying chamber arranged evenly on the upper and lower surfaces of the box. The helical partition comprises gas permeable parts that separate compartment sections that are initial and final along the coolant flow, every of which comprises at least one nozzle. Nozzles arranged on the upper surface of the box are displaced relative to the nozzles arranged on the lower surface of the box by half of the distance between neighbouring nozzles, and a part of the surface of the divider entering the box is perforated. Nozzles are arranged in plan at the angle of not more than 12° to conventional radii stretching in the drying chamber.

EFFECT: invention shall intensify drying process as a result of higher evenness of coolant distribution in a drying chamber and elimination of chamber walls overheating at coolant entry level.

3 cl, 4 dwg

Spray dryer // 2451256

FIELD: machine building.

SUBSTANCE: spray dryer includes solution loading device, drying agent supply and gas-distributing system, unloading device and drying chamber. According to the invention, solution loading device, drying agent supply and gas-distributing system is made in the form of hollow cylinder with cover and bottom, which is installed on shaft with drive, the inner cavity of which is divided into sectors alternating in circumferential direction; some of the above sectors are connected to drying agent supply system, and the other ones are connected to solution loading device; each sector is equipped with openings made on side surface of cylinder. Openings made in sectors related to drying agent gas-distributing system have rectangular shape, and vertical row of holes is provided in sectors interconnected with solution loading device.

EFFECT: higher drying efficiency of suspensions.

2 dwg

FIELD: heating.

SUBSTANCE: devices provide for drying with the help of a chamber in the form of two truncated cones that are electrically connected by bases. In the upper part of the chamber, which is heat insulated and negatively charged with the help of an electrostatic generator, on a plugged site, there is an attachment installed with a nozzle to spray the electrostatically negatively charged product, which simultaneously excludes the possibility of product particles sticking on the chamber wall, where hot air is supplied with the help of the attachment installed tangentially. In the lower part of the chamber, which is non-insulated, positively charged and unplugged, there is an attachment installed tangentially to supply the positively charged mixture of hot air with the product that flows oppositely to the upper one. As a result of contact of mixed particles of different poles there are granules produced, and condensate appearing on the wall of the lower part from evaporated moisture leaks under the space between the wall and the funnel and leaks outside along the funnel flap. The used coolant with dry product is sent along the inner space of the funnel into the cyclone, where their separation is carried out.

EFFECT: production of a monodisperse product.

1 dwg

Spray drier // 2435118

FIELD: heating.

SUBSTANCE: spray drier includes loading and unloading devices, heat carrier supply connection pipes, vertical housing, perforated deflector located in its inner volume, drive hollow shaft with disc and a cone nozzle, which are installed on it. Perforated deflector is made in the form of hollow cylinder connected to housing, on side surface of which holes are arranged in rows; at that, surface areas of the holes in rows increase as per normal law from disc plane upwards and downwards; to lower part of perforated deflector there attached is cone liquid receiver, and in inner volume of cone liquid receiver there arranged is cone nozzle connected to radial disc channels.

EFFECT: obtaining air-free flow with uniform volume density and uniform drying of material throughout the drier volume.

1 dwg

FIELD: machine building.

SUBSTANCE: drying unit consists of drying chamber with side surface out of plates with gaps between them for inlet of air into chamber, of sprinklers of sea water in middle part of internal cavity of chamber and of branch for outlet of gas-suspension. The branch is connected to a cyclone. According to the invention the drying chamber of the unit is positioned vertically; in an upper part the case of the chamber it is equipped with a branch for outlet of water steams in air. The branch has a horizontal section, inside of which there is installed a heat exchanger-condenser for water steams. A collector of condensate is arranged under the heat exchanger-condenser. The air outlet of the branch is equipped with an air flow regulator. Also, as a source of drying agent (air) there is used a Rank-Hilsh vortex pipe. Outlet of warm flow of air from this pipe is connected to a tangential branch for supply of drying agent into the case of the drying chamber, while outlet of cold flow of air from the pipe is connected to the heat exchanger-condenser.

EFFECT: production of powder of salt from sea water and production of drinking water.

7 cl, 4 dwg

FIELD: chemistry.

SUBSTANCE: swirl chamber for processing poultry processing plants wastes has a helical collector and guide apparatus for supplying hot air or furnace gases; a loading device; hyperbolically shaped end walls (or approximately hyperbolical - for simplifying manufacturing, e.g. conical); axial connecting pipes, as well as tangential connecting pipes on the perimetre of the chamber on its diametrically opposite sides; a high-speed rotating disc on the axis of the chamber. On the disc along its radius there are vertical blades for crushing the processed material. After deep drying, the wastes can be stored for a long time and for a limited time after predrying. The wastes can then be used manure.

EFFECT: prevention of wastes from falling in water bodies and contamination of water bodies.

2 dwg

FIELD: heating.

SUBSTANCE: in the device consisting of drying chamber, spraying device, drying agent supply and discharge devices, device for accumulation of dry product the new feature is that as the spraying device there used is brush sprayer, drying chamber consists of two symmetrical semi-chambers located on both sides relative to brush sprayer, the cross section of which represents the profile of flame; supply of drying agent is performed from two and more devices separated between each other with walls, located from below in walls of semi-chambers symmetrically relative to brush sprayer, equipped with supply channels and louvres; at that, supply of drying agent from the appropriate devices is performed with various velocity and temperature, and final drying of product is performed during its being deposited with flows of drying agent of various temperature; device for accumulation of dry product represents the chamber the walls of which are equipped with drying agent supply devices and louvres through which there additionally supplied is drying agent.

EFFECT: improving solutions drying quality.

1 dwg

Spraying drier // 2377485

FIELD: heating systems, drying.

SUBSTANCE: invention refers to chemical and food industries and can be used when obtaining dry disperse materials. Spraying drier includes drying chamber, gas distribution grid, and supply hydraulic atomisers. Cavity of drying chamber has structural elongation made in the form of hollow cylinder in which there installed is gas duct for supplying drying agent, and to upper part of drying chamber there additionally introduced is tubular annular feeder connected to cylinder and equipped in a circumferential direction with hydraulic atomisers directed to drying chamber walls.

EFFECT: improving drying intensity.

1 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to dust separation equipment. Scrubber comprises case with dusty and cleaned gas branch pipes, sprinkler made up of manifold with nozzles, bottom distributing plate and top limiting plate with filler material arranged there between, liquid trap and slime discharge device. Sprayer nozzle is composed of a swirler its casing being made up of feed pipe and cylindrical cartridge aligned therewith. Centrifugal swirler composed of blind cylindrical insert is connected to case lower section and aligned therewith. Radial-flow swirler has communicated and aligned axial, taper and cylindrical throttling bores. Radial-flow swirler is arranged in case cylindrical chamber to form annular cylindrical chamber to feed fluid to radial-flow swirler tangential fluid inlets and communicated with three chambers: conical, cylindrical and diffuser discharge chamber. Chambers are arranged so that outlet of one chamber makes an inlet of another chambers while tangential inlets represent channels arranged tangentially to insert inner surface.

EFFECT: higher efficiency and reliability of dust separation.

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