Dust separator

FIELD: mechanics filtration.

SUBSTANCE: invention is designed to separate suspended particles from gases. The dust separator incorporates a countercurrent flow concentrator connected to the vortex chamber outlet axial branch pipe, the concentrator allowing an axial purified gas out coming and a removal of concentrated dust. The vortex chamber is provided with a slot and gas duct with a gate arranged on the chamber curvilinear wall on the flow inlet side, the gas duct communicating with the duct removing the concentrated dust from the countercurrent flow concentrator into the extension countercurrent flow cyclone. The vortex chamber opposite side has a slot and gas duct communicating with the extension countercurrent flow cyclone. The extension countercurrent flow cyclones are equipped with the transit-receiving vessels connected to the gates incorporating the gates with vertical dust standpipes, while the receiving vessel is provided with a dust duct with gate. The proposed invention increases the efficiency of operation.

EFFECT: increase in dust separator efficiency.

2 cl, 2 dwg, 3 tbl, 5 ex

 

The invention relates to the field of separating suspended particles from gases, namely, devices for cleaning of gases from dispersed impurities using inertial forces, and can be used in thermal power, chemical, construction and other industries.

Famous cyclone separator comprising snail enclosure with socket input stream, a peripheral outlet for the withdrawal of filecontent in the external cyclone and the Central channel to output the cleaned gas /Carboholic DT Snail dust collectors // water Supply and sanitary technique. 1972, No. 7, pp.28-31/.

A disadvantage of this device is unstable external cyclone fluctuations in the dispersion and concentration of particles in the flow, which leads to a decrease in the efficiency of its work. In addition, in this device there is no second stage separation process, which could be used to twist thread.

Famous cyclone separator vortex-type (A.S. No. 1611405, IPC 01D, 45/12, BI No. 45-90, Prototype). The cyclone separator includes a curved vortex chamber, the receiver in its lower part, the connection of the input interconnected through the cracks, and the axial pipe of the purified gas output. In the wall of the chamber is a window that communicates with a pipe input, with cracks and window equipped with adjustable dampers, and the angles between the radii is, passing through the centers of the Windows and cracks are 100°-140°. The swirl chamber is equipped posted on its end wall opposite the nozzle output and coaxial him a ring with a diameter larger than a diameter of the nozzle output, and a width of 0.15 to 0.25 the width of the camera. The axial connection of the output of the purified gas embedded in a vortex chamber at a distance of 0.3-0.4 of the width of the camera. The receiver is made of two sections arranged one under the other and connected to a dust shutter. The cyclone separator is supplied attached to axial pipe o-expanding hub with axial withdrawal of the purified gas and tangential conclusion of dust and gas concentrate. This conclusion is connected with the lower section of the receiver, attached to the end wall coaxially to the pipe output additional pipe connected with the lower section of the receiver. The top section of the receiver is provided with a curved plate fairing attached to the lower generatrix of the vortex chamber from the entrance of dust and gas flow and located with the increasing backlash to it. It is also equipped with visors, located under the cowl on the wall of the receiver from the entrance and exit of dust and gas flow. The lower section of the receiver is made in the form of a counter-flow cyclone with dust chute axis, and is fixed to the reflector of the vortex.

The disadvantage of paliotta the indicator by A.S. No. 1611405 is the imperfection of aerodynamic separation process of expanding hub of the second stage and the design of the second lower section of the receiver, intended for the final deposition and emission of dust from the gas stream, which reduces the efficiency of dust collection.

Tasked to improve the design of cyclone separator to improve the effectiveness of its work.

The problem is solved as follows. In accordance with the prototype of the cyclone separator includes a vortex chamber, located underneath the receiver, port of entry with a movable gate, the axial connection of the purified gas output, buried in a vortex chamber at a distance of 0.3-0.4 of the width of the chamber, a ring with a diameter larger than a diameter of the nozzle output, and a width of 0.15 to 0.25 the width of the camera, placed on the end wall of the chamber opposite the outlet of the purified gas output and coaxial him lower generatrix of the vortex chamber. According to the invention, equipped with a cyclone separator connected to the axial outlet of the purified gas output of the vortex chamber counterflow cylindrical hub with an axial withdrawal of the purified gas and outlet filecontent, in the vortex chamber from the input stream on its curved wall made a crack and the flue with a gate which is connected with the flue exhaust filecontent from FR the East cylindrical hub extension countercurrent cyclone, and on the opposite curved wall of the vortex chamber is made a slit and a flue communicating with external counter-flow cyclone, and external counter-flow cyclones are equipped with transit-receivers shutters with vertical dust risers, and the receiver of the vortex chamber is provided with a pipe-line with the bolt. The length of the transit of receivers equal to 5-10 their diameters, length counterflow cylindrical hub is 1-3 its diameter, the diameter of the transit-receiver cyclone equal to 1.1-1.5 diameter paliwanag holes of the cyclone, and the angle of inclination of the external-flow cyclone transit receivers is in the range of 0°-45° from the vertical.

Further, the invention is illustrated by drawings and tables that show:

- figure 1 - the design of the cyclone separator (view from the side outlet nozzle swirl chamber);

- figure 2 - design cyclone separator (view from the side of the introduction pipe of the vortex chamber);

in table 1 the efficiency of deposition of dust depending on the length of the transit-receiver cyclone;

in table 2 the efficiency of deposition of dust depending on the length of the counterflow cylindrical hub;

in table 3 the efficiency of deposition of dust depending on the angle of the counter-flow cyclone with transit receiver.

The cyclone separator includes a vortex chambers is 1 with inlet pipe 2, the bottom forming 3 and receiver 4. Camera 1 and the receiver 4 are communicated with each other by means of slots 5, 6. The camera is fixed axial connection of the output of the purified gas 7, sides 8, sides 9 and plate 10. Induction pipe 2 is equipped with a movable gate 11, intended to control the twist of dust flow. On the curved wall of the chamber 1 from the gas inlet made a slit 12 for removal of the source of dust in the flue gas duct 13 with the gate 14. Plate 10 and the curved surface of the camera 1 form a slit 15 for removal of filecontent, is attached to the flue 16.

To the bottom of the receiver 4 of the attachment of the coal pipe 17 equipped with a dust shutter 18.

The slit 15 of the exhaust filecontent of the vortex chamber is communicated through duct 16 with external counter-flow conical cyclone 19, puliyogare hole which is attached transit-receiver 20, equipped with a dust shutter 21.

For axial connection of the purified gas output 7 of the vortex chamber attached counterflow cylindrical hub 22, provided with an axial socket 23 of the purified gas output from counterflow cylindrical hub 22, outlet 24 filecontent and flue 25.

The ducts 13 and 25 are interconnected and bypass-flow conical cyclone 26 to puliyogare hole which is attached transit-receiver 27, where the config dust shutter 28.

The swirl chamber 1 and the external-flow conical cyclones 19 and 26 is in communication with a dust hopper 29.

The device operates as follows.

Dusty stream with a concentration of particles in a flow of less than 100 g/m3enters the vortex chamber 1 through the pipe 2 I, where due to inertial forces dust is concentrated at the periphery and with a part of the flow in the amount of 2-10% with a high content of particles through the gap 5 is supplied to the receiver 4, which is released from the particle stream, the speed of wool which is higher than the transporting speed of the flow. Pipe 2 input is equipped with a movable gate 11, designed to regulate the twist flow in the separating elements. Part of the flow in the amount of 2-5% through the gap 12 removal of the source of dust is given in the flue gas duct 13 with the gate 14.

Separated from the gas in the receiver of the particles arrive in the coal pipe 17 equipped with a dust shutter 18. Neodiprion in the receiver 4 dust through the gap 6 enters the vortex chamber 1, where it joins the stream flowing through the induction pipe 2.

A stream with a lower content of particles around a lower generatrix 3 of the vortex chamber 1, the contained particles due to forces of inertia are shown in the parietal area of the snail chamber and flow in the amount of 10% through the gap 15 through the duct 16 is disposed in a bypass-flow conical cyclone 19,puliyogare hole which is attached transit-receiver 20, equipped with dust shutter 21.

Cleaned in the cyclone stream joins the main stream exiting the axial tube 23 conclusion purified gas counterflow cylindrical hub 22.

In the circuit camera 1 - slot 5 - pulariani 4 - slot 6 - camera 1 can be unloaded to the flow, the circulation flow is formed particles, as available "vortex castle" contributes to the return of large particles made from pilipienka, and also contributes to the outflow of gas from the separated dust at 10% in the slit 15 of the exhaust filecontent. The magnitude of the circulation flow is regulated by the position of a movable gate 11 and depending on the gas flow rate is selected such that it was sufficient for removal of the separated dust particles from the vortex chamber 1 to the receiver 4 through the slit 5 and the external cyclone 19 through the slit 15.

The flow in the amount of 85-88% of flows in counterflow cylindrical hub 22 through the axial pipe of the purified gas output 7 of the vortex chamber. In counterflow cylindrical hub 22 due to inertial forces dust is concentrated at the periphery and with a part of the gas in the amount of 5-10% goes to the outlet 24 filecontent and flue 25.

Flows from the ducts 13 and 25 are received in the external-flow conical cyclone 26. The purified stream from the cyclone 26 is attached to the core by the CMO, emerging from the axial tube 23 conclusion purified gas counterflow cylindrical hub 22.

The gate 14 into the flue 13 allows you to adjust the particle size distribution of dust at the entrance to the cyclone 26. This prevents the formation of deposits in the cyclone 26 and freezing the material in the dust shutter 28.

Thus, in counterflow cylindrical hub 22 is the purification of gas from dust particles, not useprivacy in the vortex chamber 1.

Cleaned from dust particles gas in the number of 75-83% return from the dust collector through the axial tube 23 conclusion purified gas counterflow cylindrical hub 22, where it is joined by the stream in the amount of 10% of the flow conical cyclone 19 and the flow of 7-15% of the counterflow conical cyclone 26.

The use of counterflow cylindrical hub 22 increases the overall efficiency deduster, as the area of separation of particles in a counterflow cylindrical hub compared to once-through hub used in the invention, AS the USSR №1611405. This is confirmed by research /Kirpichev, E.F., Tsar'kova A.A. Comparative tests of various cyclones on the stand) / / thermal engineering, 1957. No. 10/.

In transit-the receivers 20 and 27 counterflow conical cyclone 19 and 26 p is oshodi reducing twist and attenuation of flow, solace formed in cyclones harnesses dust. When this arrived in the transit receivers dust particles separated from gas and form a Packed layer of particles /Vasilevsky M.V., Zykov EVGENIY Methods to improve the efficiency dedusting systems gases group with cyclone devices in low power // Industrial power engineering, 2004. No. 9. - P.54-57/.

The most effective attenuation of the twist of the thread, depending on the concentration of particles is in transit-receivers cyclones in length from 5 to 10 diameters transit receiver, and the diameter of the transit-receiver cyclone is in the range of 1.1-1.5 diameter paliwanag holes conical cyclone. When such ratios movement of dust occurs before the end of the transit receiver.

Caught in the vortex chamber 1 and the external-flow conical cyclone 19 and 26 dust enters the total dust hopper 29.

In the invention, AS the USSR №1611405 the final selection of particles from a stream at the bottom section of the receiver, representing a counter-flow cyclone with dust chute axis and mounted on it with a reflector of the vortex. The experience of operating the dust collector showed that the collection efficiency of particles in the cyclone apparatus of this construction is not high enough. To increase the overall efficiency of the proposed final capture particles to hold you in ecoeffectiveness-flow conical cyclone type IC-CN-34 or TSN-11 /Cyclones NIIGAS. Guidelines for the design, fabrication, installation and operation. - Yaroslavl, 1970. - 95 S./.

The operating experience of the proposed collector showed that due to the small median size of dust coming in the external tapered cylindrical cyclone concentrator, hang material in the dust shutter. To prevent clogging of the transit-receiver cyclone and freezing of the material in the dust shutter, it was decided to perform the bypass canal at the entrance of the cyclone through the flue with the gate was additionally given the source material taken from the vortex chamber through a slit made on its curved wall from the input stream. After this event, the material is unloaded from dust shutter remote countercurrent cyclone cylindrical hub began to be carried out consistently.

Thus, the invention increases the efficiency due to use as a second stage more efficient counterflow cylindrical hub and stabilizing external-flow conical cyclones, as variable load, fluctuations in the particle size distribution and concentration of dust, working conditions remote-flow conical cyclones remain unchanged, and the installation of these cyclones and tra the zit receivers inclined enable you to combine all streams separated dust in a common bag. The invention allows to reduce the particle content in the purified gas 2-3 times.

Examples of carrying out the invention

Example 1

In the laboratory test was conducted single-flow conical cyclone SK-CN-34 with a diameter of 90 mm diameter paliwanag holes equal to 20 mm When the test was used dust of cement grade 400 M. As pilipienka used muted transit-receiver in the form of a strut diameter of 25 mm and pulariani, made of transparent, rigid and impermeable material. Cleaned in the cyclone stream received in the bag filter. The definition of effectiveness was conducted by measuring the amount of dust, the number caught by the cyclone dust and gain filter bag. The efficiency of deposition of dust depending on the length of the transit receiver in comparison with pilipienka shown in table 1.

The efficiency of separation of particles in the cyclone using as a dust hopper receiver, made of transparent, rigid and impermeable material has shown 90%efficiency. Analysis of the obtained data showed that the length of the transit receiver should be greater than 5 diameters, if the caliber to take the diameter of the transit receiver. However, when the length of the transit receiver more than 10 diameters observed the hang of material in the bottom portion of the transit-receiver, due to the decrease in twist flow and reduced carrying capacity dust harness.

Thus, the length of the transit-receiver cyclone should be 5-10 diameters, if the caliber to take the diameter of the transit receiver.

Example 2

In the laboratory test was conducted counterflow cylindrical hub and a straight cylindrical hub with a diameter of 200 mm When the test was used dust cement M400. A cylindrical hub were a set of coupling between the rings, allowing you to change the length from 100 mm to 600 mm with step of 100 mm In external flow conical cyclone SK-CN-34 with a diameter of 90 mm was given 20% of the gas flow with filecontentresult. Determination of gas flow through the bypass cyclone was determined by known hydraulic resistance coefficient. Cleared in the cylindrical hub stream received in the bag filter. The definition of effectiveness was conducted by measuring the amount of dust trapped dust and gain the bag filter.

In the work carried out to compare the efficiency of deposition of flow and flow concentrators depending on the length of the cylindrical part.

The results of the tests are given in table 2.

When the length of the hub less than 1 diameter PR is coming fast rearrangement of the flow at the entrance to the hub, that leads to increased entrainment of material. When the length of the hub more than 3 diameters decreasing twist flow in the apparatus, resulting in freezing of the material in the body of the device.

Thus, the efficiency of counterflow hub is higher compared to once-through hub, and the length of the counterflow cylindrical hub must be from 1 to 3 diameters, if the caliber to take the diameter of the cylindrical hub.

Example 3

In the laboratory test was conducted single-flow conical cyclone SK-CN-34 with a diameter of 90 mm diameter paliwanag holes equal to 20 mm When the test was used dust of cement grade 400 M. As pilipienka used muted transit-receiver in the form of a strut with a diameter of 20 mm Visual observation of the operation of the cyclone showed that when the diameter of the transit-receiver equal to the diameter paliwanag holes of the cyclone, the removal of collected dust is unstable - hung material in the upper part of the transit-receiver, which leads to blockage paliwanag holes. When using the transit-receiver with a diameter of 22 to 30 mm removal of collected dust is stable, hovering material in the riser is not observed, the driving paliwanag holes cyclone no is no. When using the transit-receiver with a diameter of over 30 mm, the decrease of the twist of the flow in the riser, resulting in a slight decrease in the efficiency of dust collection.

Thus, the efficiency and stability of the cyclone increases if the diameter of the transit-receiver cyclone equal to 1.1-1.5 diameter paliwanag holes cyclone.

Example 4

In the laboratory test was conducted single-flow conical cyclone SK-CN-34 with a diameter of 90 mm diameter paliwanag holes equal to 20 mm When the test was used dust of cement grade 400 M. As pilipienka used muted transit-receiver in the form of a strut diameter of 25 mm, a length of 300 mm. Cleaned in a cyclone stream received in the bag filter. The definition of effectiveness was conducted by measuring the amount of dust, the number caught by the cyclone dust and gain the bag filter.

The efficiency of deposition of dust depending on the angle of the cyclone with the transit receiver to the vertical slope are given in table 3.

Thus, the angle of the cyclone with the transit receiver in the range of 0° to 45° from the vertical negligible effect on the collection efficiency of the particles. When installing a cyclone with an angle of 45° to 90° (horizontally) observed reduction is their efficiency of trapping. This is due to the lack of conditions for removal of collected dust from the discharge zone of the stream, forming a bulk layer of particles), which leads to the secondary entrainment of collected dust.

Example 5

In a production environment Topki cement plant was cleaned air in the installation aspiration dosing unit using the proposed device. The plant capacity is 10000 m3/h, the hydraulic resistance of 2000 PA.

Visual observation of the operation showed that the allocation of collected dust through the dust the gates of the vortex chamber and the external-flow conical cyclone vortex chamber is stable. In the dust shutter remote-flow conical cyclone cylindrical hub is the hanging material. Microscopic analysis of collected material showed that the median size of the dust that is captured in the swirl chamber, is 80 μm; caught in the external conical cyclone vortex chamber 25 microns; caught in the external conical cyclone counterflow cylindrical hub 5 μm. Thus, the hanging material in the dust shutter remote conical cyclone cylindrical hub is because of the small median size of dust. The dust has increased ADH is Ziya, stick to the walls, hang in transit to the target cyclone, scored Pelevine hole of the cyclone. To improve the stability of the cyclone, eliminating hang of material diversion channel, by which the entrance of the cyclone was additionally given the source material taken from the vortex chamber. After this event, the material is unloaded from dust shutter remote countercurrent cyclone cylindrical hub began to be carried out consistently.

The technical result of the invention is to increase the efficiency of the cyclone separator.

Table 1
Length, mm100150300
Efficiency, %879596

Table 2
The length of the hub, mm100200300400500600
The efficiency of counterflow hub %909496979695
The effectiveness of once-through hub %858791 929088

Table 3
Angle, °45°90°
Efficiency, %969589

1. Cyclone separator comprising a vortex chamber, located underneath the receiver, port of entry with a movable gate, the axial connection of the purified gas output, buried in a vortex chamber at a distance of 0.3-0.4 of the width of the chamber, a ring with a diameter large diameter pipe output and a width of 0.15 to 0.25 the width of the camera, placed on the end wall of the chamber opposite the outlet of the purified gas output and coaxial him lower generatrix of the vortex chamber, wherein the cyclone separator is supplied attached to the axial outlet of the purified gas output of the vortex chamber counterflow cylindrical hub with an axial withdrawal of the purified gas and outlet filecontent, in the vortex chamber with side of the input stream on its curved wall made a crack and the flue with a gate which is connected with the flue exhaust filecontent from counterflow cylindrical hub extension countercurrent cyclone, and on the opposite curved wall of the vortex chamber is made a slit and gasko is, communicating with external counter-flow cyclone, and external counter-flow cyclones are equipped with transit-receivers shutters with vertical dust risers, and the receiver of the vortex chamber is provided with a pipe-line with the bolt.

2. The cyclone separator according to claim 1, characterized in that the length of the transit-receiver cyclone equal to 5-10 diameters transit-receiver cyclone.

3. The cyclone separator according to claim 1, characterized in that the length of the counterflow cylindrical hub is 1-3 its diameter.

4. The cyclone separator according to claim 1, characterized in that the diameter of the transit-receiver cyclone equal to 1.1 to 1.5 diameters paliwanag holes cyclone.

5. The cyclone separator according to claim 1, characterized in that the angle of the bypass-flow cyclone transit receivers is within 0-45° from the vertical.



 

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3 dwg

FIELD: technological processes, filters.

SUBSTANCE: invention concerns gas treatment systems. Dust collection system includes source of gas to be cleaned, fan, pipes, four dust collectors at oncoming swirl gas flows, each collector made in the form of cylindrical case with conical tank, tangential top inlet pipe, inlet swirler in bottom inlet pipe, with axial outlet pipe for cleaned gas and dust discharge pipe in which floodgate is mounted, and dampers in pipes. Conical tank of first dust collector has dust and gas mix discharge pipe. Source of gas to be cleaned is connected to tangential inlet pipe and inlet swirler of first dust collector, axial outlet pipe of which is connected to tangential inlet pipe and inlet swirler of second dust collector. Axial outlet pipe of second collector is connected to inlet swirler of fourth dust collector. Dust and gas mix discharge pipe of conical tank of first dust collector is connected to tangential inlet pipe and inlet swirler of third dust collector, axial outlet pipe of which is connected to tangential inlet pipe of fourth dust collector, and axial outlet pipe of fourth collector is connected to the fan inlet.

EFFECT: enhanced efficiency of dusted gas treatment, especially for fine-dispersed particles.

2 cl, 1 dwg

Cyclone separator // 2358811

FIELD: engines and pumps.

SUBSTANCE: cyclone separator comprises a primary cyclone with the fist outside air intake and the first air discharge outlet. Note that the latter comprises a flow passage part with a perforated section, that makes its lateral wall, and a closed part on its bottom, a secondary cyclone communicating with the primary cyclone. It incorporates also a flow guide arranged above the fist discharge outlet to prevent abrupt change of the direction of airflow forced out from the first discharge outlet and to direct air blown out from the perforated part to the secondary cyclone.

EFFECT: higher efficiency of separation, lower noise.

11 cl, 5 dwg

Battery cyclone // 2366516

FIELD: engines and pumps.

SUBSTANCE: proposed battery cyclone comprises distributing chamber, counter-current cyclone elements arranged in parallel and communicating with external dust separator and purified gas accumulating chamber. Aforesaid distributing chamber is furnished with inlet swinging-gave valve branch pipe attached thereto and settling chamber. The latter communicates with distributing chamber via slots. Counter-current cyclone elements represent cylindrical cyclone counter-current dust concentrators with individual tangential gas inlets that communicate with aforesaid distributing chamber. Proposed device incorporates also purified gas discharge pipes and dust withdrawal sections provided with tangential dust concentrate outlets that communicate with sectionalised dust collector that allows withdrawing dust-gas mix in external dust collectors. The latter represent separate counter-current cyclones. Dust concentrator exhaust pipes are furnished with scroll-type swirlers and communicate with purified gas collecting chamber that incorporates a swinging gate valve. Counter-current cyclones have through collectors with gate valves that comprise dust risers, while settling chamber is furnished with dust duct with gate valve.

EFFECT: higher efficiency.

4 cl, 4 dwg, 3 tbl, 5 ex

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