A closed-loop dust removal integrated treatment device suitable for high-temperature strong acid atmosphere

Abstract

The application relates to the technical field of environmental protection equipment, and particularly discloses a closed-loop dust removal integrated treatment device suitable for a high-temperature strong-acid gas atmosphere, which comprises a dust removal shell, a dust hopper connected to the lower end of the dust removal shell, a negative pressure assembly connected to the upper end of the dust removal shell, a circular partition plate rotationally arranged in the dust removal shell, a rotary driving device connected to the upper end of the circular partition plate, a plurality of downwardly-extending sintering filter cartridges arranged in an annular array on the circular partition plate, a feeding assembly arranged at the center of the lower end of the dust removal shell, and a double-gas-flow cleaning mechanism arranged in the dust removal shell and used for cleaning the sintering filter cartridges; the double-gas-flow cleaning mechanism with a special design can clean the sintering filter cartridges on line, does not cause airflow turbulence in the dust removal equipment, and can clean the sintering filter cartridges more thoroughly compared with a traditional backflushing airflow cleaning mode, so that the filtering and retaining effect of the sintering filter cartridges on dust airflow is effectively ensured.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of environmental protection equipment, and particularly discloses a closed-loop dust removal integrated treatment device suitable for a high-temperature strong-acid atmosphere. BACKGROUND

[0002] High-temperature strong-acid gas is generated in the metallurgy, chemical industry, heavy metal smelting and recycling and other industries, and some dust particles are mixed in the gas. Before the gas is utilized, the dust particles need to be removed. When the traditional bag filter is used for filtering the high-temperature strong-acid gas, the bag is prone to damage, thereby reducing the service life. Therefore, more metal or ceramic sintered filter cartridges are used in the industry to filter and remove the dust in the high-temperature strong-acid gas. However, compared with the traditional bag filter cartridge, the metal or ceramic sintered filter cartridge has a relatively dense structure, small and uniform pores, so that the dust blocking the filter cartridge often penetrates into the inside of the filter cartridge, and it is difficult for compressed air to completely blow out the dust in the pores during air blowing cleaning.

[0003] A high-temperature dust collector is disclosed in the utility model patent with the application number 202123254863.6, which comprises a box body, a discharge hopper arranged at the bottom of the box body, a flue gas inlet and a flue gas outlet arranged on the box body, a horizontal flower plate arranged in the box body, the flower plate being located between the flue gas outlet and the flue gas inlet, a fixed support fixedly connected to the bottom of the filter cartridge, the fixed support being fixedly connected to the flower plate through a plurality of pull rods, a pulse backwashing device arranged on the box body, the pulse backwashing device comprising a blowing pipe fixed to the box body and a gas pocket fixed to the outer wall of the box body, the gas pocket being connected to the blowing pipe, a pulse valve being arranged between the gas pocket and the blowing pipe, a plurality of gas nozzles with downward outlets being arranged on the blowing pipe, the gas nozzles being located directly above the filter cartridge and corresponding to the filter cartridge. The high-temperature dust collector disclosed in the patent uses pulse airflow to backwash and clean the filter cartridge. Due to the special properties of the metal or ceramic sintered filter cartridge, the filter cartridge cannot be completely cleaned by using only the reverse pulse airflow, and the reverse pulse airflow can stir the dust originally deposited in the filter area, thereby causing airflow turbulence in the dust collector. In addition, some related patents disclose a cleaning mechanism that moves up and down outside the filter cartridge, so that the cleaning mechanism can brush the outer surface of the filter cartridge during the up-and-down movement. However, such a cleaning mechanism can only clean the dust and impurities on the outer surface of the sintered filter cartridge, and the dust and impurities penetrating into the inside of the filter cartridge cannot be effectively cleaned. Based on this, the application provides a closed-loop dust removal integrated treatment device suitable for a high-temperature strong-acid atmosphere, which can effectively solve the above technical problems. SUMMARY

[0004] The application aims to provide a closed-loop dust removal integrated treatment device suitable for high-temperature strong-acid atmosphere, so as to solve the problems that the existing metal or ceramic sintering filter element is difficult to be effectively and comprehensively cleaned when used for filtering dust in high-temperature strong-acid gas, and that the airflow in the dust removal area is easily disturbed during cleaning, which is not conducive to dust settlement.

[0005] The application is realized by the following technical scheme:

[0006] The application discloses a closed-loop dust removal integrated treatment device suitable for high-temperature strong-acid atmosphere, which comprises a dust removal shell, a dust collecting hopper connected to the lower end of the dust removal shell, and a negative pressure assembly connected to the upper end of the dust removal shell.

[0007] The double-gas-flow cleaning mechanism comprises a radial groove plate fixedly arranged directly below the annular moving track of the sintering filter element, a first half-cylinder clamping cylinder and a second half-cylinder clamping cylinder symmetrically arranged in the radial groove plate in a sliding manner, a plurality of half-cylinder gas flow grooves aligned with each other are formed in the inner walls of the first half-cylinder clamping cylinder and the second half-cylinder clamping cylinder, a plurality of air inlet channels and air outlet channels are formed in the first half-cylinder clamping cylinder and are connected with the half-cylinder gas flow grooves in a tangential direction, a compressed gas source is connected to the air inlet channels through a compressed gas inlet pipe, a filter box is connected to the air outlet channels through a compressed gas outlet pipe, and a gas suction pump is connected to the other end of the filter box, a gas conveying pipe extending to the upper end of the dust removal shell is connected to the compressed gas source, and a gas jet nozzle aligned with the sintering filter element is connected to the end of the gas conveying pipe, and a transmission mechanism is arranged to drive the first half-cylinder clamping cylinder and the second half-cylinder clamping cylinder to move close to or away from each other.

[0008] The closed-loop dust removal integrated treatment device disclosed by the application uses the sintering filter element to filter and retain dust impurities in high-temperature strong-acid gas, so that the sintering filter element has better high-temperature resistance and acid and alkali resistance compared with a bag filter element, and the service life of the whole device can be prolonged.

[0009] The high-temperature strong-acid gas containing dust is introduced by the feeding assembly, flows out at the center of the dust removal shell and flows to the surrounding, and then is sucked into the sintering filter element under the action of the continuous negative pressure in the sintering filter element during the flowing process in the dust removal shell, and the dust impurities contained in the gas are filtered and retained by the sintering filter element, and the purified gas is discharged from the upper end of the dust removal shell and is directly conveyed to the downstream equipment.

[0010] The closed-loop dust removal integrated treatment device in the application can rotate the circular partition plate by a certain angle by starting the rotary drive device after a period of operation, so that the sintered filter cartridges connected to the lower end of the circular partition plate are sent into the double airflow cleaning mechanism one by one for cleaning.

[0011] In the specific cleaning process, when the sintered filter cartridge moves to the middle position of the connecting line of the first semicircular cylinder and the second semicircular cylinder, the two are synchronously moved close to each other by the transmission mechanism to be closed, so that the sintered filter cartridge is in the cylinder formed by the two.

[0012] Then, high-pressure gas paths are provided by the compressed gas source, so that the high-pressure airflow acts on the sintered filter cartridges from two paths. One path of compressed gas is discharged from the air jet nozzle and enters the sintered filter cartridge, thereby performing backflushing cleaning on the sintered filter; another path of compressed gas enters the air inlet channel through the compressed gas inlet pipe, and then flows rapidly along the airflow ring groove formed by the two semicircular airflow grooves to form a high-speed rotational flow, so that the outer surface of the sintered filter cartridge in the inner circle of the high-speed rotational flow forms a larger negative pressure, and the high-pressure backflushing airflow in the sintered filter cartridge is combined to sharply increase the air pressure difference between the two sides of the sintered filter cartridge, thereby quickly and fully blowing off all the dust originally attached to the sintered filter cartridge, and the dust mixed airflow after being blown off enters the compressed gas outlet pipe along the air outlet channel, and finally the dust is filtered and retained by the filter box.

[0013] After the sintered filter cartridge is cleaned, it is synchronously moved out during the opening of the first semicircular cylinder and the second semicircular cylinder, and is put into dust removal and filtration of high-temperature strong acid gas, while the other sintered filter cartridge repeats the above-mentioned action for cleaning treatment, so that all the filter cartridges can be cleaned completely one by one, ensuring good dust removal and filtration effect.

[0014] As a further arrangement of the above-mentioned scheme, a plurality of mounting holes are arranged in an annular array on the circular partition plate, a through pipe is connected to the mounting holes through a sealing bearing, the lower end of the through pipe is connected to the sintered filter cartridge, and a pinion is arranged at the upper end of the through pipe, and an inner ring gear is fixedly arranged in the dust removal shell and engaged with all the pinions.

[0015] The above is a further optimized design of the application, which enables the sintered filter cartridges to rotate and adjust through the design of the sealing bearing and the through pipe, and enables all the sintered filter cartridges to perform planetary rotation during the rotation of the circular partition plate through the engagement design between the pinions and the inner ring gear, so that the outer circular surface of the sintered filter cartridges can be directly directed to the feed assembly one after another, and the sintered filter cartridges can uniformly and comprehensively filter the dust impurities in the high-temperature strong acid gas.

[0016] As a further arrangement of the above-mentioned scheme, the transmission mechanism comprises a guide cam concentrically connected to the lower end of the circular partition plate and a pressing wheel connected to the upper end of the back of the second semicircular cartridge, the outer circular surface of the guide cam is provided with a protruding part radially aligned with each sintering filter element and acting on the pressing wheel, a spring is connected between the second semicircular cartridge and the end of the radial slot plate, the lower end of the first semicircular cartridge and the lower end of the second semicircular cartridge are both connected with a guide column arranged in a central rotational symmetry, the lower surface of the radial slot plate is rotationally connected with a rotating strip, and the two ends of the rotating strip are both provided with a strip-shaped opening, and the two guide columns both pass through the straight opening on the radial slot plate and act on the corresponding strip-shaped opening.

[0017] As a further arrangement of the above-mentioned scheme, the back of the first semicircular cartridge and the back of the second semicircular cartridge are both connected with a guide rod, and the guide rod cooperates with the guide hole on the end of the radial slot plate or the dust removal shell.

[0018] The above is one of the specific design schemes of the transmission mechanism, so that when the sintering filter element is rotated to the first semicircular cartridge and the second semicircular cartridge to the middle position of the connecting line of the circular partition plate, the second semicircular cartridge will be pushed to move towards the sintering filter element due to the action between the protruding part on the guide cam and the pressing wheel; at the same time, under the action of the rotating strip, the strip-shaped opening and the guide column, the first semicircular cartridge will also move towards the sintering filter element, so that the first semicircular cartridge and the second semicircular cartridge can move towards each other to completely close and seal, and the sintering filter element can be concentrically sleeved at the center of the two, and then subsequent high-pressure airflow cleaning can be performed.

[0019] As a further arrangement of the above-mentioned scheme, the fan-shaped included angle between the gas inlet channel, the gas outlet channel and the circle center line is not more than 30°, and the inner circle diameter of the first semicircular cartridge and the second semicircular cartridge after being closed is greater than the outer diameter of the sintering filter element by 4-6 cm. The above is the limitation of some important parameters of the double airflow cleaning mechanism in the application, wherein the smaller the fan-shaped included angle between the gas inlet channel, the gas outlet channel and the circle center line, the larger the coverage area of the high-speed rotational flow formed inside, so that the dust attached to the sintering filter element can be cleaned in all directions; and the spacing between the inner circle of the first semicircular cartridge and the second semicircular cartridge after being closed and the outer surface of the sintering filter element should be reasonably set, so that the sintering filter element can be completely in the center of the high-speed rotational flow, thereby forming a strong negative pressure on the outer surface of the sintering filter element.

[0020] As a further arrangement of the above-mentioned scheme, the compressed gas source is connected with a three-way pipe, one end of the three-way pipe is connected with the compressed gas inlet pipe through an electromagnetic valve, and the other end of the three-way pipe is connected with the gas conveying pipe through an electromagnetic valve. The above is one of the specific design schemes of the gas circuit in the double airflow cleaning mechanism, and the on-off of the electromagnetic valve is used to control the on-off of the compressed gas.

[0021] As a further arrangement of the above-mentioned scheme, the feeding assembly comprises a gas inlet cylinder concentrically arranged at the lower end of the inner cavity of the dust removal shell, and the gas inlet cylinder is composed of a cylindrical body at the upper end and an inverted conical cylinder at the lower end, and an inlet pipe is connected to the outer circumferential surface of the lower end of the cylindrical body and arranged along the tangent direction of the cylindrical body.

[0022] The above is one of the design schemes of the feeding assembly, which can make the high-temperature strong acid gas enter the gas inlet cylinder and spiral upward along the inner wall of the gas inlet cylinder, and separate and sink the large particle impurities in the gas by centrifugal force, thereby achieving preliminary separation and dust removal.

[0023] As a further arrangement of the above-mentioned scheme, the sintered filter core is any one of a ceramic sintered filter core or a stainless steel sintered felt filter core.

[0024] As a further arrangement of the above-mentioned scheme, the dust removal shell is fixed to the top of the rack in a cylindrical shape, the lower end opening of the dust removal shell is connected to the dust collecting hopper, and the lower end of the dust collecting hopper is connected to a dust discharge pipe with a gate valve.

[0025] As a further arrangement of the above-mentioned scheme, the negative pressure assembly comprises a negative pressure fan, and the gas suction end of the negative pressure fan is connected to a gas suction pipe, which is in communication with the inner cavity of the dust removal shell above the circular partition plate.

[0026] Compared with the prior art, the application has the following beneficial effects:

[0027] The closed-loop dust removal integrated treatment device disclosed by the application uses a sintered filter core to remove dust from high-temperature strong acid gas, which can effectively prolong the service life of the filter core, and the special designed double airflow cleaning mechanism can clean the sintered filter core online without causing airflow turbulence in the dust removal equipment, and compared with the traditional backflushing airflow cleaning method, the double airflow cleaning mechanism can clean the sintered filter core more thoroughly, thereby effectively ensuring the filtering and retaining effect of the sintered filter core on dust gas.

[0028] When the double airflow cleaning mechanism cleans the sintered filter core, on the one hand, a vertical downward backflushing airflow is introduced from the top of the sintered filter core, and on the other hand, the sintered filter core is sleeved in the cylindrical body enclosed by the first semicircular clamping cylinder and the second semicircular clamping cylinder, and the high-speed rotational flow formed by the airflow ring groove on the inner wall of the cylindrical body can form a large negative pressure on the outer surface of the sintered filter core, and then under the action of the large pressure difference between the inside and outside of the sintered filter core, the dust originally attached to the sintered filter core can be quickly and fully blown down, thereby effectively ensuring the cleaning effect of the sintered filter core.

[0029] The double airflow cleaning mechanism in the application combines the opening and closing action with the rotating action of the sintering filter core, when the sintering filter core rotates and moves to the connecting line of the first semicircular cartridge and the second semicircular cartridge, the first semicircular cartridge and the second semicircular cartridge can realize automatic closing, and when the sintering filter core moves out from between the two, the first semicircular cartridge and the second semicircular cartridge can also automatically open; the transmission mechanism is designed ingeniously and novel, and effectively realizes the automatic opening and closing process of the sintering filter core during cleaning.

[0030] The application further improves the connection mode between the sintering filter core and the circular partition plate, and through the meshing design between the pinion and the inner ring gear, all the sintering filter cores can make planetary rotation during the rotation of the circular partition plate, so that the outer circular surface of the sintering filter core can be directly arranged towards the feeding assembly in turn, so that the sintering filter core can uniformly and comprehensively filter the dust impurities in the high-temperature strong acid gas. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0032] Figure 1 It is a first angle perspective structural schematic diagram of the application;

[0033] Figure 2 It is a second angle perspective structural schematic diagram of the application;

[0034] Figure 3 It is a perspective structural schematic diagram of the inside of the dust removal shell in the application;

[0035] Figure 4 It is a perspective structural schematic diagram of the circular partition plate, sintering filter core and the like in the application;

[0036] Figure 5 It is a first angle perspective structural schematic diagram of the double airflow cleaning mechanism in the application;

[0037] Figure 6 It is a second angle perspective structural schematic diagram of the double airflow cleaning mechanism in the application;

[0038] Figure 7 It is a top view structural schematic diagram in the lower dust removal area in the application;

[0039] Figure 8 It is a planar structural schematic diagram of the sintering filter core in the double airflow cleaning mechanism in the application;

[0040] Figure 9 For the present invention Figure 3 Enlarged structural diagram at point A;

[0041] Figure 10 For the present invention Figure 3 A magnified structural diagram at point B in the middle. Detailed Implementation

[0042] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The following will refer to the appendix... Figures 1-10 This application will be described in detail with reference to the embodiments. Example 1

[0044] Example 1 discloses a closed-loop integrated dust removal and treatment device suitable for high-temperature and strong acid atmospheres, as shown in the attached figure. Figure 1 and attached Figure 2 The main components include a frame 1, a control box 2, a dust collector housing 3, a negative pressure assembly 4, and a compressed air source 5. The dust collector housing 3 is cylindrical and fixed to the top of the frame 1. A dust collection hopper 6 is connected to the lower end of the dust collector housing 3. A dust discharge pipe 601 is connected to the bottom of the dust collection hopper 6, and a corresponding gate valve (not shown in the figure) is installed on the dust discharge pipe 601. The settled dust in the dust collection hopper 6 can be discharged by opening the gate valve. The negative pressure assembly 4 includes a high-temperature resistant and acid and alkali resistant negative pressure fan 401. An exhaust pipe 402 is connected to the exhaust end of the negative pressure fan 401, and the end of the exhaust pipe 402 extends to the upper end of the dust collector housing 3. The exhaust end of the negative pressure fan 401 can directionally transport the filtered gas to the downstream process.

[0045] Reference Appendix Figure 3 Appendix Figure 4 and attached Figure 7In the lower end of the inner cavity of the dust removal shell 3, a gas inlet cylinder 7 is concentrically arranged, which is composed of a cylindrical body 701 at the upper end and an inverted cone cylinder 702 at the lower end, thereby forming a shell structure similar to a cyclone dust collector, and the lower end of the inverted cone cylinder 702 extends into the dust hopper 6, and a feeding pipe 703 is connected to the outer circular surface of the lower end of the cylindrical body 701, and the feeding pipe 703 is arranged along the tangent direction of the cylindrical body 701. When the high-temperature strong acid gas enters the feeding cylinder 7 through the feeding pipe 703, an upward spiral gas flow can be formed, and the large-particle dust impurities in the gas can be removed by centrifugal force, then sink into the inverted cone cylinder 702, and be discharged into the dust hopper 6 by the inverted cone cylinder 702, while the spiral gas flow is thrown out from the upper end opening of the cylindrical body 701.

[0046] A circular partition plate 8 is arranged in the dust removal shell 3 above the feeding cylinder 7, and the circular partition plate 8 is sealingly and rotatably connected to the inner wall of the dust removal shell 3, which divides the upper and lower ends of the dust removal shell 3 into a lower dust removal area and an upper clean gas area through the circular partition plate 8. The end of the suction pipe 402 extends into the upper clean gas area, and a rotary drive device 9 for driving the circular partition plate 8 to rotate at a set angle is arranged at the top of the dust removal shell 3, which is composed of a servo motor + speed reducer, and the output shaft of the speed reducer is fixedly connected to the center of the circular partition plate 8.

[0047] Six to twenty mounting holes are arranged in an annular array on the circular partition plate 8, eight mounting holes are arranged in the figure, and a sintered filter element 10 is arranged in each mounting hole, which is connected to the upper clean gas area at the upper end and extends into the lower dust removal area at the lower end, and the material of the sintered filter element 10 can be a ceramic sintered filter element or a stainless steel sintered felt filter element. Finally, a double airflow cleaning mechanism 11 for cleaning the sintered filter elements 10 one by one is arranged at one end of the dust removal shell 3.

[0048] Referring to the drawings Figure 3 and the drawings Figures 5-9 , including a radial groove plate 110 fixedly connected between the feeding cylinder 7 and the inner wall of the dust removal shell 3, a first half-cylinder clamping cylinder 111 and a second half-cylinder clamping cylinder 112 are limitingly and slidingly arranged on the upper surface of the radial groove plate 110, the first half-cylinder clamping cylinder 111 and the second half-cylinder clamping cylinder 112 are mirror-symmetrically arranged, and after being closed, they form a cylindrical body with an inner diameter of 4-6 cm larger than the outer diameter of the sintered filter element 10. A plurality of semicircular airflow grooves 113 are equidistantly arranged on the inner walls of the first half-cylinder clamping cylinder 111 and the second half-cylinder clamping cylinder 112 along the height direction, and the semicircular airflow grooves 113 on the first half-cylinder clamping cylinder 111 and the second half-cylinder clamping cylinder 112 are aligned one by one, and after the first half-cylinder clamping cylinder 111 and the second half-cylinder clamping cylinder 112 are closed, the two aligned semicircular airflow grooves 113 form a complete airflow ring groove.

[0049] A plurality of air inlet channels 114 and air outlet channels 115 are formed on the first semicircular cartridge 111 and communicate with each semicircular airflow groove 113 in a tangential direction, then the outer ends of all air inlet channels 114 are commonly connected with a compressed air inlet pipe 116, the outer ends of all air outlet channels 115 are commonly connected with a compressed air outlet pipe 117, and the fan-shaped angle between the air inlet channel 114, the air outlet channel 115 and the center line is as small as possible, preferably controlled to be not more than 30°. A three-way pipe 501 is connected to the compressed air source 5, one end of the three-way pipe 501 is connected to the compressed air inlet pipe 116 through an electromagnetic valve 502, the other end of the three-way pipe 501 is also connected to a gas delivery pipe 503 through an electromagnetic valve 502, the gas delivery pipe 503 extends upward and enters the upper clean air area, then a gas nozzle 504 vertically downward and aligned with the sintering filter element 10 in the first semicircular cartridge 111 and the second semicircular cartridge 112 is connected to the end of the gas delivery pipe 503. The end of the compressed air outlet pipe 117 is connected to a filter box 12 fixed on the rack 1, the inside of the filter box 12 is provided with a corresponding filter layer, and the other end of the filter box 12 is also connected to a gas suction pump 13.

[0050] The upper and lower ends of the back of the second semicircular cartridge 112 are respectively connected with a squeeze wheel 118 and a guide rod 119, the guide rod 119 cooperates with the guide hole on the end face of the radial groove plate 110, and a spring 120 is connected between the end face of the radial groove plate 110 and the second semicircular cartridge 112. Similarly, the back of the second semicircular cartridge 112 is also provided with a guide rod 119, which cooperates with the guide hole on the dust removal shell 3. A guide cam 14 acting with the squeeze wheel 118 is fixedly connected to the lower surface of the circular partition plate 8 concentrically, and a protruding part 141 radially aligned with each sintering filter element 10 is arranged on the outer circular surface of the guide cam 14. In addition, guide columns 121 passing through corresponding straight-line ports 1101 on the radial groove plate 110 are connected to the lower ends of the first semicircular cartridge 111 and the second semicircular cartridge 112, and the two guide columns 121 are rotationally symmetrically arranged with the center of the closed cylindrical body as the center, then a rotating bar 122 is rotatably connected to the lower surface of the radial groove plate 110 at the rotationally symmetric center position of the two guide columns 121, and strip-shaped ports 123 acting with the corresponding guide columns 121 are formed at both ends of the rotating bar 122. When the sintering filter element 10 rotates and moves to the middle of the first semicircular cartridge 111 and the second semicircular cartridge 112, the protruding part 141 on the guide cam 14 acts with the squeeze wheel 118, thereby pushing the second semicircular cartridge 112 to move towards the sintering filter element 10. At the same time, under the action of the rotating bar 122, the strip-shaped port 123 and the guide column 121, the first semicircular cartridge 111 also moves towards the sintering filter element 10, until the first semicircular cartridge 111 and the second semicircular cartridge 112 are closed and sealed, thereby concentrically sleeving the sintering filter element 10 at the center of the two.

[0051] The closed loop dust removal integrated treatment device disclosed in the embodiment 1 is suitable for high temperature strong acid atmosphere. In the operation process, the negative pressure assembly 4 continuously draws air to form negative pressure in the dust removal shell 3, and the negative pressure difference of the upper clean gas area is larger. The high temperature strong acid gas is introduced into the feeding cylinder 7 through the feeding pipe 703 and enters the feeding cylinder 7 in the tangential direction, so as to form a spiral upward moving gas flow. At this time, the large particle dust impurities in the gas fall from the bottom of the feeding cylinder 7 and settle in the dust collecting hopper 6 under the action of centrifugal force. The spiral gas flow is thrown out from the top opening of the feeding cylinder 7 to the surrounding, and the gas flow after being thrown out is affected by the surrounding sintered filter element 10, so that the small particle dust impurities therein are filtered and retained. The purified gas flow after dust removal enters the upper clean gas area, and is finally sent out of the whole device by the negative pressure assembly 4.

[0052] In the operation process of the closed loop dust removal integrated treatment device, the circular partition plate 8 is rotated by a certain angle through the driving device 9 every certain period of time, so that the plurality of sintered filter elements 10 connected below are sequentially cleaned by the double gas flow cleaning mechanism 11 at the cleaning station. In the cleaning process, when the sintered filter element 10 rotates and moves to the middle of the connecting line of the first half circular clamp cylinder 111 and the second half circular clamp cylinder 112, the protruding part 141 on the guide cam 14 acts on the extrusion wheel 118, so as to push the second half circular clamp cylinder 112 to move towards the sintered filter element 10. At the same time, under the action of the rotating strip 122, the strip-shaped port 123 and the guide column 121, the first half circular clamp cylinder 111 also moves towards the sintered filter element 10, until the first half circular clamp cylinder 111 and the second half circular clamp cylinder 112 are closed and sealed, so as to concentrically sleeve the sintered filter element 10 at the center of the two.

[0053] Then, the two electromagnetic valves 502 at both ends of the three-way pipe 501 are opened, so that the compressed gas acts on the sintered filter element 10 from two paths. One path of compressed gas is vertically discharged from the jet nozzle 504 and enters the sintered filter element 10, so as to perform backflushing cleaning on the sintered filter element 10. Another path of compressed gas enters the gas inlet channel 114 through the compressed gas inlet pipe 116, and then flows along the complete gas flow ring groove to form a high-speed rotational flow, so that the outer surface of the sintered filter element 10 in the inner circle of the high-speed rotational flow forms a larger negative pressure. In combination with the high pressure backflushing gas flow in the sintered filter element 10, the gas pressure difference between the inner and outer sides of the sintered filter element 10 is sharply increased, so that the dust attached to the sintered filter element 10 can be quickly and fully blown off. The dust mixed gas flow after being blown off enters the gas outlet channel 115 through the compressed gas outlet pipe 117, and finally the dust is filtered and retained in the filter box 12.

[0054] After cleaning, the circular partition plate 8 is controlled to rotate by a certain angle again, and the next sintered filter element 10 is cleaned, and the cleaned sintered filter element 10 is immediately put into dust removal and filtration of the high-temperature strong-acid gas stream. Finally, when the dust and impurities settled in the dust hopper 6 reach a certain amount, the gate valve is opened to discharge them. Example 2

[0055] Example 2 discloses a closed-loop dust removal integrated treatment device suitable for high-temperature strong-acid atmosphere, which is an optimized and improved design based on the technical solution in Example 1. The same parts as in Example 1 are not described again.

[0056] Referring to the accompanying drawings Figure 3 , the accompanying drawings Figure 4 , and the accompanying drawings Figure 10 , the sealing bearing 15 is arranged in each mounting hole of the circular partition plate 8, and the through pipe 16 is arranged in the sealing bearing 15. The lower end of the through pipe 16 is connected with the sintered filter element 10 through the flange 161, and the upper end of the through pipe 16 is fixedly provided with the pinion 162. In addition, the inner ring gear 17 is fixedly arranged on the ring wall of the upper clean gas area, and the inner ring gear 17 is engaged with the pinions 162 at the upper ends of all the through pipes 16.

[0057] Through the above improved design, in the rotating process of the circular partition plate 8, the sintered filter element 10 connected with the lower end of the through pipe 16 is synchronously rotated around its central axis through the engagement between the pinion 162 and the inner ring gear 17, so that different regions of the circumferential surface of the sintered filter element 10 are directed to the central axis of the entire dust removal shell 3 in turn, and then the gas thrown out of the top opening of the feeding cylinder 7 can be contacted and filtered in the first time, so that the circumferential surface of all the sintered filter elements 10 can uniformly and effectively filter and remove the dust and impurities in the high-temperature strong-acid gas, and the dust removal and filtration effect of the sintered filter element 10 is improved.

[0058] The above are only preferred embodiments of the present application, and are not used to limit the present application, and any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A closed-loop dust removal integrated treatment device suitable for high-temperature strong acid atmosphere, comprising a dust removal shell, a dust hopper is connected to the lower end of the dust removal shell, and a negative pressure assembly is connected to the upper end, characterized in that, The interior of the dust removal shell is provided with a circular partition plate in a sealing and rotating mode, and the upper end of the circular partition plate is connected with a rotating driving device, a plurality of downward extending sintering filter cartridges are connected on the circular partition plate in an annular array mode, the lower end center of the dust removal shell is provided with a feeding assembly, and a double airflow cleaning mechanism for cleaning the sintering filter cartridges is arranged in the dust removal shell. The double airflow cleaning mechanism comprises a radial groove plate fixedly arranged below the annular moving track of the sintering filter cartridges, the radial groove plate is limited to slide with a first half-cylinder clamping cylinder and a second half-cylinder clamping cylinder arranged in a symmetrical mode, a plurality of half-cylinder airflow grooves aligned with each other are formed in the inner walls of the first half-cylinder clamping cylinder and the second half-cylinder clamping cylinder, a plurality of air inlet channels and air outlet channels connected with the half-cylinder airflow grooves in a tangential direction are formed in the first half-cylinder clamping cylinder, the air inlet channels are connected with a compressed air source through a compressed air inlet pipe, the air outlet channels are connected with a filter box through a compressed air outlet pipe, and the other end of the filter box is connected with a gas suction pump, the compressed air source is connected with a gas conveying pipe extending to the upper end of the dust removal shell, and the end of the gas conveying pipe is connected with a gas nozzle arranged in alignment with the sintering filter cartridges, and the double airflow cleaning mechanism further comprises a transmission mechanism for driving the first half-cylinder clamping cylinder and the second half-cylinder clamping cylinder to move close to or away from each other. When the sintering filter cartridge moves to the middle position of the line connecting the first half-cylinder clamping cylinder and the second half-cylinder clamping cylinder, the transmission mechanism is used to make the two move close to each other to be closed, so that the sintering filter cartridge is arranged in the cylinder formed by the first half-cylinder clamping cylinder and the second half-cylinder clamping cylinder.

2. The closed loop dust removal integrated treatment device suitable for high temperature strong acid atmosphere according to claim 1, characterized in that, A plurality of mounting holes are formed in the circular partition plate in an annular array mode, a through pipe is connected in the mounting hole through a sealing bearing, the lower end of the through pipe is connected with the sintering filter cartridge, the upper end of the through pipe is provided with a pinion, and an inner ring gear is fixedly arranged in the dust removal shell and engaged with all the pinions.

3. The closed loop dust removal integrated treatment device suitable for high temperature strong acid atmosphere according to claim 1, characterized in that, The transmission mechanism comprises a guide cam concentrically connected with the lower end of the circular partition plate and a pressing wheel connected with the upper end of the back of the second half-cylinder clamping cylinder, the outer circular surface of the guide cam is provided with a protruding part radially aligned with each sintering filter cartridge and acting with the pressing wheel, a spring is connected between the second half-cylinder clamping cylinder and the end of the radial groove plate, the lower end of the first half-cylinder clamping cylinder and the second half-cylinder clamping cylinder are both connected with a guide column arranged in a central rotational symmetry, the lower surface of the radial groove plate is rotatably connected with a rotating strip, and the two ends of the rotating strip are both provided with a strip-shaped port, and the two guide columns both pass through the straight port on the radial groove plate and act with the corresponding strip-shaped port.

4. The closed loop dust removal integrated treatment device suitable for high temperature strong acid atmosphere according to claim 3, characterized in that, The back of the first half-cylinder clamping cylinder and the second half-cylinder clamping cylinder is connected with a guide rod matched with the guide hole on the end of the radial groove plate or the dust removal shell.

5. The closed loop dust removal integrated treatment device suitable for high temperature strong acid atmosphere according to claim 1, characterized in that, The fan-shaped included angle between the air inlet channel, the air outlet channel and the line connecting the center is not more than 30°, and the inner circle diameter of the first half-cylinder clamping cylinder and the second half-cylinder clamping cylinder after being closed is greater than the outer diameter of the sintering filter cartridge by 4-6 cm.

6. The closed loop dust removal integrated treatment device suitable for high temperature strong acid atmosphere according to claim 1, characterized in that, A three-way pipe is connected with the compressed air source, one end of the three-way pipe is connected with the compressed air inlet pipe through an electromagnetic valve, and the other end of the three-way pipe is connected with the gas conveying pipe through an electromagnetic valve.

7. The closed loop dust removal integrated treatment device suitable for high temperature strong acid atmosphere according to claim 1, characterized in that, The feeding assembly comprises an air inlet cylinder arranged concentrically at the lower end of the inner cavity of the dust removal shell, and the cylinder is composed of a cylindrical body at the upper end and an inverted conical cylinder at the lower end.

8. The closed loop dust removal integrated treatment device suitable for high temperature strong acid atmosphere according to claim 1, characterized in that, The sintered filter element is any one of a ceramic sintered filter element or a stainless steel sintered felt filter element.

9. The closed loop dust removal integrated treatment device suitable for high temperature strong acid atmosphere according to claim 1, characterized in that, The dust removal shell is fixed in a cylindrical shape at the top of the frame, the lower end opening of the dust removal shell is connected with the dust hopper, and the lower end of the dust hopper is connected with the dust discharge pipe with a gate valve.

10. The closed loop dust removal integrated treatment device suitable for high temperature strong acid atmosphere according to claim 1, characterized in that, The negative pressure assembly comprises a negative pressure fan, and the air suction end of the negative pressure fan is connected with an air suction pipe in communication with the inner cavity of the dust removal shell above the circular partition plate.

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