A nitrogen-filled dust collector device for rotary kiln tail gas treatment

Abstract

The application relates to the technical field of dust removal equipment, in particular to a nitrogen-filling dust remover device for rotary kiln tail gas treatment, which comprises a device base, a primary dust removal tank fixed on the device base, a tail gas inlet arranged at one end of the primary dust removal tank, a secondary dust removal tank connected to the other end of the primary dust removal tank through a corrugated pipe, a tail gas outlet arranged at the top of the secondary dust removal tank, a sprayer installed at the top of the primary dust removal tank and connected with a main nitrogen pipe, a processing cavity formed in the secondary dust removal tank by a partition plate, an accelerating seat arranged on the partition plate, a gas inlet and a side inlet connected with a vice nitrogen pipe arranged on the part of the accelerating seat located in the corrugated pipe, a main shaft driven by a driver eccentrically arranged in the accelerating seat, eccentric blades arranged in a ring shape on the main shaft, and an air outlet pipe arranged on the side of the accelerating seat far from the gas inlet; the air outlet pipe is connected with a separation seat, and a through hole with a filter screen is arranged in the middle of the separation seat; the safety and efficiency of tail gas treatment can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dust removal equipment, in particular to a nitrogen-filled dust remover for rotary kiln tail gas treatment. BACKGROUND

[0002] In the recycling and processing of battery materials, rotary kiln is widely used as a key calcination equipment. The tail gas generated by this process is complex, containing not only a large amount of metal oxide dust, but also submicron particulate matter condensed from volatile components, and trace combustible gases generated by material decomposition or residual electrolyte combustion. This kind of tail gas has the characteristics of high temperature, wide particle size distribution, strong adhesion and certain explosion risk, which poses a serious challenge to the subsequent dust removal and purification system.

[0003] Currently, the pretreatment of such tail gas usually adopts conventional technologies such as cyclone dust removal and spray cooling. However, these existing technologies have obvious defects: first, although ordinary spray quenching can achieve cooling, it easily leads to water vapor saturation in the tail gas, and part of the metal salt dust deliquesces when meeting water, which aggravates the adhesion of the dust and easily causes the caking of the inner wall of the subsequent pipeline and equipment, resulting in the rise of system resistance or even blockage. Second, the traditional dry pretreatment has limited separation efficiency for fine and low-density battery material dust, resulting in a large amount of fine dust entering the downstream bag filter, greatly increasing the filtration load and shortening the service life of the filter bag. More importantly, when combustible dust and gas exist in the tail gas, the existing pretreatment system lacks effective safety protection mechanism, and under certain concentration and temperature conditions, there is a potential risk of dust explosion, while the conventional water spraying humidification method will cause the above-mentioned bag sticking and corrosion problems while suppressing the explosion. SUMMARY

[0004] The present application aims to provide a nitrogen-filled dust remover for rotary kiln tail gas treatment to improve the safety and efficiency of tail gas treatment and solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: a nitrogen-filled dust remover for rotary kiln tail gas treatment, comprising a device base, a primary dust removal tank is fixedly arranged on the device base, the primary dust removal tank is provided with a tail gas inlet at one end and is connected with a secondary dust removal tank through a corrugated pipe at the other end, and the secondary dust removal tank is provided with a tail gas outlet at the top;

[0006] A sprayer is installed at the top of the primary dust removal tank, and a main nitrogen gas pipe is connected to the side surface; a treatment cavity is formed in the secondary dust removal tank by a partition plate, and an acceleration seat is arranged on the partition plate, the part of the acceleration seat located in the corrugated pipe is provided with an air inlet and a side inlet connected with a secondary nitrogen gas pipe;

[0007] The eccentricity in the acceleration seat is provided with a main shaft driven by a driver, the main shaft is provided with eccentric blades distributed in a ring shape, and the acceleration seat is provided with an air outlet pipe on the side away from the air inlet; the air outlet pipe is connected with a separation seat, the separation seat is provided with a through hole with a filter screen in the middle, the through hole is connected with a diffusion pipe, and the bottom of the separation seat is provided with an inclined guide seat connected with an ash outlet pipe;

[0008] The bottom of the main shaft extends to form a tail shaft, the knock rod is rotatably installed on the outer wall of the separation seat, the tail shaft is provided with a rotating rod capable of intermittently knocking the knock rod, and the bottom end of the knock rod acts on the outer wall of the separation seat; the separation seat and the guide seat are provided with a scraping mechanism, which can clean the inner wall of the guide seat during the process of separating the guide seat and the separation seat.

[0009] The tail gas inlet at one end of the primary dust removal tank is connected with the tail gas discharge pipe of the rotary kiln, the other end is connected with the corrugated pipe, and a step is arranged between the primary dust removal tank and the corrugated pipe to prevent waste water from flowing into the corrugated pipe.

[0010] The spray device is composed of a conveying pipeline and a spray head, a drainage pipe for discharging dust-containing waste water is arranged at the bottom of the primary dust removal tank, and a main nitrogen pipe in communication with the nitrogen storage tank is connected to the side of the primary dust removal tank.

[0011] The secondary dust removal tank is in a horizontal structure and is movably installed on the device base, and the tail gas outlet on the secondary dust removal tank is in communication with an independent treatment cavity formed by the partition plate in the secondary dust removal tank.

[0012] The eccentricity in the acceleration seat is provided with a main shaft driven by a driver, the main shaft is provided with eccentric blades distributed in a ring shape, and the acceleration seat is provided with an air outlet pipe on the side away from the air inlet; the air outlet pipe is connected with a separation seat, the separation seat is provided with a through hole with a filter screen in the middle, the through hole is connected with a diffusion pipe, and the bottom of the separation seat is provided with an inclined guide seat connected with an ash outlet pipe;

[0013] The top of the acceleration seat is provided with a driver for driving the rotation of the main shaft, the driver is a speed reducer motor, and the side of the acceleration seat away from the air inlet is provided with an air outlet pipe.

[0014] The bottom of the acceleration seat is provided with a separation seat in a rectangular hollow structure, and the air outlet pipe is connected to one side of the separation seat.

[0015] The diffusion pipe is obliquely arranged, and the diffusion pipe is in communication with the tail gas outlet.

[0016] The guide seat is provided with an inclined cavity, the bottom of the guide seat is connected with a vertical ash outlet pipe, and the inclined cavity is used to prolong the gas flow path and guide the settlement and aggregation of particulate matter.

[0017] The bottom end of the main shaft is provided with a tail shaft penetrating through the bottom surface of the acceleration seat, and a horizontal rotating rod is installed on the tail shaft.

[0018] The top end and the bottom end of the knock rod are both provided with end heads, the top end is located on the rotating path of the rotating rod, and the bottom end is attached to the side of the separation seat.

[0019] The inner wall of the bottom of the separation seat is provided with a horizontal guide rail, a sliding seat is slidably arranged on the guide rail, an inclined plane plate is fixedly arranged on the top of the sliding seat and faces the air outlet pipe, a folding curtain is connected to the bottom surface of the sliding seat, and the other end of the curtain is connected to the inner wall of the separation seat.

[0020] The outer part of the separation seat is provided with an electric push rod for driving the sliding seat.

[0021] A scraper is arranged on the bottom of the sliding seat through a sleeve type movable boom, the scraper can be attached to the inclined inner wall of the guide seat, spring telescopic heads are arranged at the two ends of the scraper, and a brush that can be attached to the through-hole filter screen is arranged on the top of the inclined plane plate.

[0022] Compared with the prior art, the dust collector device has the following beneficial effects:

[0023] 1. The dust collector device of the present application is used as a front pretreatment unit of a bag filter, which integrates spray quenching and nitrogen charging inerting functions in a primary dust removal tank, realizes rapid cooling of high-temperature tail gas and preliminary reduction of oxygen content, protects the subsequent bag filter from high-temperature damage, and significantly improves the intrinsic explosion-proof safety level of the system from the source. In the secondary dust removal tank, the eccentric blade compression acceleration structure is used to give the gas-solid mixed flow high-speed kinetic energy, and the inertial separation seat is used to realize the secondary efficient physical capture of particulate matter, especially fine particles, thereby effectively reducing the dust load of the main bag filter.

[0024] 2. In the secondary dust removal tank of the present application, the knocking dust removal and the scraper curtain linkage type scraping mechanism are used in cooperation, which can effectively prevent the wet sticky particulate matter from being hardened and blocked in the separation cavity, and ensure the stability and reliability of the long-term operation of the pretreatment device.

[0025] 3. The dust collector device of the present application provides a low-temperature, low-oxygen and low-dust-concentration ideal inlet working condition for the downstream bag filter through the synergistic combination of quenching and inerting and inertial separation, thereby greatly improving the safety, dust removal efficiency and system continuous stable operation capability of the rotary kiln tail gas treatment process as a whole. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the first schematic diagram of the overall structure of the dust collector of the present application.

[0027] Figure 2 It is the second schematic diagram of the overall structure of the dust collector of the present application.

[0028] Figure 3 It is the first schematic diagram of the structure of the secondary dust removal tank of the present application.

[0029] Figure 4 It is the second schematic diagram of the structure of the secondary dust removal tank of the present application.

[0030] Figure 5The schematic diagram of the partition plate and the accelerating seat structure of the application.

[0031] Figure 6 The schematic diagram of the internal structure of the accelerating seat of the application.

[0032] Figure 7 The schematic diagram of the connection of the separating seat, the guiding seat and the ash discharge pipe structure of the application.

[0033] Figure 8 The schematic diagram of the separating seat and the guiding seat structure of the application.

[0034] Figure 9 The schematic diagram of the internal structure of the separating seat of the application.

[0035] Figure 10 The schematic diagram of the folding curtain structure of the application.

[0036] In the figure: 1, device base; 2, primary dust removal tank; 3, corrugated pipe; 4, secondary dust removal tank; 5, tail gas inlet; 6, sprayer; 7, main nitrogen pipe; 8, partition plate; 9, accelerating seat; 10, side inlet; 11, auxiliary nitrogen pipe; 12, air inlet; 13, main shaft; 14, blade; 15, driver; 16, air outlet pipe; 17, separating seat; 18, guiding seat; 19, ash discharge pipe; 20, through hole; 21, escape pipe; 22, tail shaft; 23, rotating rod; 24, knocking rod; 25, end head; 26, guide rail; 27, sliding seat; 28, inclined plane plate; 29, electric push rod; 30, curtain; 31, movable boom; 32, scraper; 33, telescopic head; 34, brush; 35, tail gas outlet. DETAILED DESCRIPTION

[0037] Hereinafter, the application will be further described in conjunction with the drawings and the specific embodiments, and it should be noted that, under the premise of no conflict, the following described embodiments or technical features can be combined in any manner to form new embodiments, and it is known that the described embodiments are only a part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the application.

[0038] Please refer to Figures 1 to 10 The application provides a technical solution: a nitrogen-filled dust remover device for rotary kiln tail gas treatment, which is a pre-device of a bag-type dust remover, and can preliminarily treat the tail gas generated by the rotary kiln and preliminarily remove the particulate matters in the tail gas.

[0039] As Figure 1 , Figure 2As shown, the nitrogen-filled dust remover device of the present application is fixed on the ground of the dust removal workshop through the device base 1, a horizontal primary dust removal tank 2 is fixed and installed on the device base 1 in a welded manner, one end of the primary dust removal tank 2 is provided with a tail gas inlet 5 which is connected with the tail gas discharge pipe of the rotary kiln, and the other end is connected with a corrugated pipe 3 through a flange, a secondary dust removal tank 4 is welded and fixed on the corrugated pipe 3, the secondary dust removal tank 4 is also of a horizontal structure, and the secondary dust removal tank 4 is installed on the device base 1 in a limited sliding manner, so that the vibration of the secondary dust removal tank 4 does not affect the primary dust removal tank 2, and the top of the secondary dust removal tank 4 is welded and provided with an upward tail gas outlet 35 for the tail gas preliminarily treated by the primary dust removal tank 2 and the secondary dust removal tank 4 to escape into the bag-type dust remover for further treatment.

[0040] As shown, Figure 1 a conventional sprayer 6 is installed on the top of the primary dust removal tank 2 in a screw-fixed manner, the sprayer 6 is composed of a conveying pipeline and a spray head, can form a cooling water mist in the primary dust removal tank 2, directly contacts with the tail gas, and directly settles the particulate matters in the tail gas, at the same time, the bottom of the primary dust removal tank 2 is provided with a drain pipe in a welded manner to discharge the wastewater containing dust particles, continuously completes the quenching and dust removal work of the tail gas, and the side of the primary dust removal tank 2 is also connected with a main nitrogen gas pipe 7 which is connected with a nitrogen gas storage tank, can add nitrogen gas into the atmosphere during the tail gas treatment process, reduces the oxygen content in the tail gas, and increases the safety of the tail gas treatment.

[0041] As shown, Figure 3 a step is arranged between the primary dust removal tank 2 and the corrugated pipe 3, which can prevent the wastewater from flowing into the corrugated pipe 3, only the sprayed tail gas can enter the secondary dust removal tank 4 through the corrugated pipe 3, a partition plate 8 is installed in the secondary dust removal tank 4 in a welded manner, the partition plate 8 is vertically installed, can divide an independent treatment cavity at the tail end of the secondary dust removal tank 4, avoids that the sprayed tail gas directly escapes into the treatment cavity, and the tail gas outlet 35 is communicated with the treatment cavity.

[0042] As shown, Figure 4 an acceleration seat 9 is installed in the middle of the partition plate 8 in a welded manner, the acceleration seat 9 is horizontally arranged and embeddedly installed on the partition plate 8, the main body part of the acceleration seat 9 is located in the treatment cavity, and the part in the corrugated pipe 3 is provided with a side inlet 10, the side inlet 10 is connected with a secondary nitrogen gas pipe 11 in a welded manner, the secondary nitrogen gas pipe 11 is connected with the nitrogen gas storage tank or the nitrogen gas recovery pipeline of the bag-type dust remover, can supply nitrogen gas into the acceleration seat 9 through the secondary nitrogen gas pipe 11, and further reduces the oxygen content in the tail gas.

[0043] As shown, Figure 5As shown in the figure, the acceleration seat 9 is a circular structure as a whole, and the part of the acceleration seat 9 in the corrugated pipe 3 is also provided with an air inlet 12, so that the exhaust gas in the corrugated pipe 3 can enter the acceleration seat 9 from the air inlet 12. The auxiliary nitrogen pipe 11 is arranged in the tangential direction of the acceleration seat 9, and the mixed gas can enter the acceleration seat 9 along the tangential direction of the acceleration seat 9 through the mixing of nitrogen and exhaust gas.

[0044] As shown in the figure, Figure 6 The main shaft 13 is eccentrically installed in the acceleration seat 9 through a bearing, and the main shaft 13 is eccentrically installed away from the air inlet 12. The main shaft 13 is provided with a plurality of blades 14 arranged in an annular array. The blades 14 are also eccentrically arranged in the acceleration seat 9. The space in the acceleration seat 9 is unevenly cut through the blades 14. The space near the air inlet 12 is larger, while the space away from the air inlet 12 is smaller. The top of the acceleration seat 9 is provided with a driver 15 installed through a screw. The driver 15 usually adopts a speed reducer motor, which can drive the main shaft 13 and the blades 14. During the eccentric rotation of the blades 14, the mixed gas located at the air inlet 12 position can be gradually compressed. The acceleration seat 9 is provided with an air outlet pipe 16 on the side away from the air inlet 12. The compressed gas is finally discharged from the air outlet pipe 16. The mixed gas after compression has a certain initial speed when entering the air outlet pipe 16.

[0045] As shown in the figure, Figures 7-9 The bottom of the acceleration seat 9 is hung with a separation seat 17 through a hanger. The separation seat 17 is a hollow rectangular seat. The air outlet pipe 16 is connected to one side of the separation seat 17, so that the compressed mixed exhaust gas can be sent into the separation seat 17. The gas and solid-liquid particles in the exhaust gas have the same initial speed when entering the separation seat 17. However, the solid particles and liquid particles have larger mass, so they can move along the direction of the separation seat 17 under the action of inertia, while the gas moves a relatively short distance. A through hole 20 with a filter screen is arranged in the middle of the separation seat 17. An upward inclined escape pipe 21 is arranged on the through hole 20. The gas can be discharged from the escape pipe 21 to the separation seat 17, and finally enters the bag-type dust collector from the exhaust gas outlet 35. The particles are finally dropped under the action of gravity, further separated from the exhaust gas, so as to avoid the dust particles containing water vapor from entering the bag-type dust collector and affecting the service life thereof.

[0046] As shown in the figure, Figure 7 The bottom of the separation seat 17 is provided with a guide seat 18 with an inclined cavity by welding. The bottom of the guide seat 18 is connected to a vertical ash discharge pipe 19 through a flange. The guide seat 18 is arranged in an inclined structure, so that the dust particles can quickly fall and contact, settle and gather on the inclined plane, and the flow path length of the gas is increased, so as to avoid the exhaust gas from entering the ash discharge pipe 19 and avoid the particles always in a floating state.

[0047] Further, asFigure 7 As shown, the bottom end of the main shaft 13 is integrally formed with a tail shaft 22, the tail shaft 22 penetrates through the bottom surface of the acceleration seat 9, a horizontal rotating rod 23 is fixedly installed on the tail shaft 22 through screws, and the two sides of the separation seat 17 are rotatably installed with a knocking rod 24 through shaft seats. The knocking rod 24 is in a vertical state in a normal state, and the top end and the bottom end of the knocking rod 24 are both provided with end heads 25. The top end of the knocking rod 24 is in the rotating path of the rotating rod 23, and the bottom end of the knocking rod 24 is on the side surface of the separation seat 17. In the process of the rotating rod 23 rotating with the tail shaft 22, the rotating rod 23 can intermittently push the top end of the knocking rod 24, so that the knocking rod 24 rotates, and the bottom end of the knocking rod 24 intermittently hits the outer wall of the separation seat 17, so that the outer wall of the separation seat 17 vibrates, and the particles adhered to the inner wall of the separation seat 17 enter the guide seat 18.

[0048] As shown in Figure 9 , Figure 10 , the particles accumulated on the inclined surface of the guide seat 18 can generally slide into the ash outlet pipe 19 under the action of their own gravity, but considering that the tail gas after spraying usually contains water mist, which can easily cause dust adhesion. Therefore, a scraping mechanism is also provided in the separation seat 17 and the guide seat 18 to promote the dust in the guide seat 18 to enter the ash outlet pipe 19.

[0049] As shown in Figure 9 , Figure 10 , the scraping mechanism includes a guide rail 26 installed on the inner wall of the bottom of the separation seat 17 through screws. The guide rail 26 is horizontally arranged, and a sliding seat 27 is limitingly and slidably installed on the guide rail 26. The top of the sliding seat 27 is fixedly installed with an inclined panel 28, which is arranged towards the direction of the air outlet pipe 16. When the particles hit the inclined panel 28, they can fall along the inclined surface. The bottom surface of the sliding seat 27 is connected with a folding curtain 30, the other end of the curtain 30 is connected to the inner wall of the separation seat 17, and an electric push rod 29 is installed outside the separation seat 17 through screws. The electric push rod 29 can push the sliding seat 27. When the electric push rod 29 retracts, the sliding seat 27 is located on one side of the guide rail 26 away from the air outlet pipe 16, the curtain 30 is in a folded state, the separation seat 17 and the guide seat 18 are in communication, and the particles can fall from the separation seat 17 into the guide seat 18. When the electric push rod 29 extends and moves the sliding seat 27 to the side close to the air outlet pipe 16, the curtain 30 can be pulled open to isolate the guide seat 18 and the separation seat 17, so that the particles in the guide seat 18 are prevented from flowing back into the separation seat 17.

[0050] As shown in Figure 9 , Figure 10As shown, the scraping mechanism further comprises a movable boom 31 vertically mounted at the bottom of the sliding seat 27, the movable boom 31 is a sleeve structure and can be telescopic, a scraper 32 is mounted at the bottom of the sliding seat 27 through the movable boom 31, when the sliding seat 27 moves towards the air outlet pipe 16, the scraper 32 can be adaptively telescopic along the inclined bottom surface of the guide seat 18, push the particles downward, help them enter the ash pipe 19, and in the process, the curtain 30 is gradually closed at the bottom of the separation seat 17, which can effectively reduce the backflow of particles, further, telescopic heads 33 with springs are mounted at both ends of the scraper 32, so that the length of the scraper 32 can be changed to adapt to the width change of both sides of the guide seat 18, and the particle scraping effect is improved.

[0051] As shown in Figure 9 , Figure 10 As shown, a brush 34 is further arranged at the top of the inclined panel 28, the brush 34 is arranged in close contact with the inner wall of the through hole 20 of the separation seat 17, the brush 34 can move with the inclined panel 28 and the sliding seat 27 to clean the filter screen on the through hole 20, prevent dust particles from blocking the through hole 20 and affect the exhaust gas from being discharged from the escape pipe 21.

[0052] In use, first, the high-temperature tail gas generated by the rotary kiln enters the primary dust removal tank 2 through the tail gas inlet 5. At the same time, the sprayer 6 is started to spray water mist into the tank to directly contact and rapidly cool the high-temperature tail gas. This process not only effectively protects the subsequent equipment, but also causes part of the coarse particles to settle due to sudden temperature drop and moisture absorption. At the same time, the main nitrogen pipe 7 fills nitrogen into the primary dust removal tank 2 to preliminarily inert the tail gas atmosphere and reduce the overall oxygen content, thereby improving the system explosion safety from the source. After the spray rapid cooling and preliminary dust removal, the tail gas enters the secondary dust removal tank 4 through the corrugated pipe 3. The tail gas is mixed with nitrogen supplemented through the auxiliary nitrogen pipe 11 at the gas inlet 12 of the acceleration seat 9 to form a mixed gas. The mixed gas enters the inside of the acceleration seat 9 under the guidance of the auxiliary nitrogen pipe 11 tangent direction. At this time, the driver 15 is started to drive the main shaft 13 and the eccentric blade 14 thereon to rotate. Due to the eccentric design of the blade 14, the mixed gas is compressed from a large volume space to a small volume space in the acceleration seat 9, and the pressure and flow rate are increased, and finally shot out from the gas outlet pipe 16 at a high speed. Subsequently, this high-speed gas-solid mixed flow enters the separation seat 17. The solid particles with large mass continue to move in the original direction due to large inertia and hit the inner wall or inclined panel 28 of the separation seat 17; while the gas with small mass is easy to change direction and is discharged through the central through hole 20 and the escape pipe 21, and finally enters the downstream bag dust collector for fine treatment through the tail gas outlet 35. The particles after impact fall into the guide seat 18 under the action of gravity and finally slide into the ash discharge pipe 19 to realize the secondary separation of gas and solid. In the running process, the tail shaft 22 at the bottom of the main shaft 13 drives the rotating rod 23 to rotate synchronously. The rotating rod 23 periodically drives the top end of the knocking rod 24 to repeatedly knock the bottom end of the knocking rod 24, and the high-frequency vibration generated effectively shakes off the sticky particles adhering to the inner wall to prevent clogging. In order to further treat the particles that may be adhered to the inclined bottom surface of the guide seat 18, the system periodically starts the scraping mechanism, the electric push rod 29 is retracted to drive the sliding seat 27 and the inclined panel 28 to move away from the gas outlet pipe 16, at this time the folded curtain 30 is retracted, the separation seat 17 and the guide seat 18 are kept in communication, and the particles can normally fall. Subsequently, the electric push rod 29 is extended to push the sliding seat 27 to move towards the gas outlet pipe 16. In this process, the curtain 30 is gradually unfolded to finally isolate the separation seat 17 and the guide seat 18 to prevent the particles from flowing back during cleaning. At the same time, the scraper 32 fixed to the bottom of the sliding seat 27 moves to completely scrape the particles accumulated on the inclined bottom surface of the guide seat 18 to the ash discharge pipe 19. The brush 34 installed at the top of the inclined panel 28 moves synchronously to clean the filter screen of the through hole 20 to prevent clogging and ensure smooth airflow. The whole device efficiently removes most of the particles in the tail gas and significantly reduces the oxygen concentration in the atmosphere, providing a low-temperature, low-oxygen, and low-dust load safe working environment for the subsequent bag dust collector, thereby fundamentally improving the safety and reliability of the rotary kiln tail gas treatment system.

[0053] In the description of the present disclosure, it should be noted that unless specifically stated and limited otherwise, the terms "mounting", "connection", "connecting" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances. Although embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A nitrogen-filled dust collector device for treating rotary kiln tail gas, comprising a device base, characterized in that: A primary dust collector is fixedly installed on the base of the device. One end of the primary dust collector is provided with an exhaust gas inlet, and the other end is connected to a secondary dust collector via a corrugated pipe. The top of the secondary dust collector is provided with an exhaust gas outlet. The primary dust collector is equipped with a sprayer on the top and connected to the main nitrogen pipe on the side; the secondary dust collector is divided into a processing chamber by a partition, and an acceleration seat is provided on the partition. The part of the acceleration seat located inside the corrugated pipe has an air inlet and a side inlet connected to the auxiliary nitrogen pipe. The accelerator seat has an eccentrically mounted main shaft driven by a driver. The main shaft has eccentrically distributed blades in a ring. The accelerator seat has an exhaust pipe on the side away from the air inlet. The exhaust pipe is connected to the separator. The separator has a through hole with a filter screen in the middle. The through hole is connected to the evacuation pipe. The bottom of the separator has an inclined guide seat. The bottom of the guide seat is connected to the ash discharge pipe. The bottom of the main shaft extends to form a tail shaft. A striking rod is rotatably mounted on the outer wall of the separator. The tail shaft is equipped with a rotating rod that can intermittently actuate the striking rod. The bottom end of the striking rod acts on the outer wall of the separator. A scraping mechanism is provided inside the separator and the guide seat. This scraping mechanism can clean the inner wall of the guide seat during the process of separating the guide seat and the separator.

2. The nitrogen-filled dust collector device for rotary kiln tail gas treatment according to claim 1, characterized in that: The primary dust collector is fixedly installed on the device base. The exhaust gas inlet at one end of the primary dust collector is connected to the exhaust gas discharge pipe of the rotary kiln, and the other end is connected to the corrugated pipe. A step is provided between the primary dust collector and the corrugated pipe to prevent wastewater from flowing into the corrugated pipe.

3. The nitrogen-filled dust collector device for treating rotary kiln tail gas according to claim 1, characterized in that: The sprayer consists of a conveying pipe and a nozzle. The bottom of the primary dust collector is equipped with a drain pipe for discharging dust-containing wastewater, and the side of the primary dust collector is connected to a main nitrogen pipe that is connected to a nitrogen storage tank.

4. The nitrogen-filled dust collector device for rotary kiln tail gas treatment according to claim 1, characterized in that: The secondary dust collector is a horizontal structure, movably installed on the device base, and the exhaust gas outlet on the secondary dust collector is connected to the independent treatment chamber formed by the partition inside the secondary dust collector.

5. The nitrogen-filled dust collector device for treating rotary kiln tail gas according to claim 1, characterized in that: The accelerator seat is equipped with a main shaft and blades eccentrically, so that the space near the air inlet is larger than the space away from the air inlet. The top of the accelerator is equipped with a driver for driving the spindle to rotate. The driver is a geared motor, and the accelerator has an exhaust pipe on the side away from the air inlet.

6. The nitrogen-filled dust collector device for treating rotary kiln tail gas according to claim 1, characterized in that: The bottom of the accelerator seat is provided with a rectangular hollow separation seat, and the air outlet pipe is connected to one side of the separation seat. The vent pipe is installed at an upward angle and is connected to the exhaust gas outlet.

7. The nitrogen-filled dust collector device for rotary kiln tail gas treatment according to claim 1, characterized in that: The guide seat is provided with an inclined cavity, and the bottom of the guide seat is connected to a vertically arranged ash outlet pipe. The inclined cavity is used to extend the gas flow path and guide the sedimentation and aggregation of particulate matter.

8. The nitrogen-filled dust collector device for rotary kiln tail gas treatment according to claim 1, characterized in that: The bottom end of the main shaft is provided with a tail shaft that penetrates the bottom surface of the accelerator seat, and a horizontal rotating rod is installed on the tail shaft; The striking rod has ends at both the top and bottom. The top end is located on the rotation path of the rotating rod, and the bottom end is attached to the side of the separation seat.

9. The nitrogen-filled dust collector device for treating rotary kiln tail gas according to claim 1, characterized in that: A horizontal guide rail is installed on the inner wall of the bottom of the separation seat. A slide block is slidably installed on the guide rail. An inclined panel facing the air outlet pipe is fixedly installed on the top of the slide block. A folding curtain is connected to the bottom surface of the slide block, and the other end of the curtain is connected to the inner wall of the separation seat.

10. A nitrogen-filled dust collector device for treating rotary kiln tail gas according to claim 9, characterized in that: The separator is externally equipped with an electric push rod for driving the slide. The bottom of the slide is equipped with a scraper via a sleeve-type movable hanger. The scraper can conform to the inclined inner wall of the guide seat. Both ends of the scraper are equipped with spring-loaded telescopic heads. The top of the inclined panel is equipped with a brush that can conform to the through-hole filter screen.

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