Pulverized coal bag type filter

Abstract

The invention discloses a pulverized coal bag type filter, and relates to the technical field of filters, the pulverized coal bag type filter comprises a box body, the top of the box body is connected with a gas purification chamber, the bottom of the box body is connected with a main ash hopper, the bottom of the main ash hopper is connected with symmetrically arranged branch ash hoppers, and the top of the main ash hopper is connected with an annular air bellow; the annular air bellow is communicated with the interior of the main ash hopper, air deflectors which are arranged at equal intervals are connected to the inner wall of the main ash hopper, an air inlet pipe is connected to the side wall of the annular air bellow, and first splitter plates which are arranged at equal intervals are connected to the interior of the air inlet pipe. According to the pulverized coal bag type filter, the multiple branch ash hoppers are arranged at the bottom of the main ash hopper, the overall height of the filter can be reduced, the annular air bellow on the main ash hopper is matched, the size of equipment can be reduced, the occupied area of the equipment can be reduced, and meanwhile the filter bag can be cleaned.

Description

Technical Field

[0001] The invention relates to the technical field of filters, and more particularly to a pulverized coal bag filter. Background Art

[0002] Pulverized coal bag filter is a device used to separate and collect dust particles from air flow, and is widely used in thermal power plants, cement plants, metallurgical industries and other industrial fields. It is mainly used to treat exhaust gas containing fine particles (such as coal powder) to reduce pollution to the environment and recover valuable materials.

[0003] The Chinese patent application number 202410259378.7 discloses a uniform filtering bag dust collector, which includes two dust boxes arranged symmetrically on the left and right, with a ash hopper at the lower end of the dust box, and a horizontal partition at the upper end of each dust box. The horizontal partition is provided with a filter element assembly cylinder rotating in a rectangular array, and a cage-type bag filter element is fixedly provided in the filter element assembly cylinder. The dust box is provided with a driving mechanism for driving all filter element assembly cylinders to rotate; each dust box is provided with an air outlet channel at the upper end, and an air inlet pipe is provided below the two dust boxes, and the upper end of the air inlet pipe is connected to a diverter extending between the lower ends of the two dust boxes. The application is provided with two dust boxes, which can switch the air duct so that one side can be filtered while the other side is cleaned, thereby improving the cleaning efficiency.

[0004] The Chinese patent application number 201810713726.8 discloses a bag dust collector, which includes a shell, a hopper, a cover plate, a partition installed on the inner side of the shell, and a plurality of filter bags installed on the partition. The partition divides the inner side of the shell into a mixed flow chamber below and a collecting chamber above. One side of the hopper has an air inlet connected to the mixed flow chamber, and one side of the shell has an air outlet connected to the collecting chamber. The hopper is equipped with a guide plate placed inside the mixed flow chamber; multiple filter bags are placed in the mixed flow chamber, and the upper end of the filter bag passes through the partition and is installed on the partition. This application has the ability to clean without stopping the machine.

[0005] The current pulverized coal bag filters still have the following problems when in use: 1. Due to the large air output of large gasification furnaces, the air volume entering the filter is also large. Although there is a dust shield inside the filter bag, a large amount of dust will still move toward the filter bag, which will cause greater filtering pressure on the top filter bag.

[0006] 2. The filter bag needs to be cleaned after use. Stopping the machine for cleaning will reduce the filtering efficiency of the equipment. Although there will be a structure for non-stop cleaning, the dust particles cleaned will be adsorbed on the filter bag again with the rising airflow, causing secondary contamination of the filter bag.

[0007] 3. A dust baffle will be set at the entrance of the filter to intercept large particles that have just entered the airflow. The large dust particles separated from the airflow will move downward, but the falling dust will come into contact with the rising airflow below, and thus be carried by the airflow to the filter bag.

[0008] Therefore, it is necessary to propose a pulverized coal bag filter to solve the above problems. Summary of the invention

[0009] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a pulverized coal bag filter to solve the problems raised in the above background technology.

[0010] The technical solution is as follows: the present invention comprises a box body, the top of the box body is connected to a clean air chamber, the bottom of the box body is connected to a total ash hopper, the bottom of the total ash hopper is connected to a symmetrically arranged ash distribution hopper, the top of the total ash hopper is connected to an annular bellows, the annular bellows and the interior of the total ash hopper are connected, the inner wall of the total ash hopper is connected to air guide plates arranged at equal intervals, the side wall of the annular bellows is connected to an air inlet pipe, the interior of the air inlet pipe is connected to a first flow divider plate arranged at equal intervals, the interior of the annular bellows is connected to a second flow divider plate for flow distribution, the top of the box body is connected to a top bracket, the bottom of the top bracket is connected to filter bags arranged in an equal interval array, the interior of the filter bags is connected to the clean air chamber, and the filter bags are elliptical; The main ash hopper is internally rotatably connected to a center rod extending into the clean air chamber, the center rod is externally connected to a driving device, and the outer wall of the center rod is connected to a centrifugal blade; An inner airflow bracket coaxially arranged with the centrifugal blades is arranged in the box body, an ash falling cavity is opened inside the inner airflow bracket, and the top opening of the ash falling cavity is arranged toward the centrifugal blades. Dust guide hoppers are connected to the top four corners of the total ash hopper.

[0011] Furthermore, the interior of the box body is connected to an outer airflow bracket located outside the inner airflow bracket, and a variable diameter flow channel with a narrow entrance and a wide exit is formed between the inner airflow bracket and the outer airflow bracket, the top of the inner airflow bracket is connected to a fan blade baffle located above the centrifugal blade, a dust baffle is provided at the widening part of the variable diameter flow channel, the ash falling chamber and the widening part of the variable diameter flow channel are connected with an ash guide pipe, the outer edge of the centrifugal blade is connected to a first ash pushing plate located in the ash falling chamber, and the variable diameter flow channel is rotatably connected to a second ash pushing plate in contact with the dust baffle.

[0012] Furthermore, a flow equalizing plate located above the fan blade baffle is connected to the outer wall of the center rod, and an array of guide plates with equal spacing is arranged on the flow equalizing plate, and the guide plates on the flow equalizing plate are gradually arranged downward toward the axis of the flow equalizing plate, and a rotating ring rotatably connected to the dust baffle is connected to the bottom of the flow equalizing plate, and the second dust pushing plate is connected to the rotating ring at equal spacing; The top of the ash guide pipe is rotatably connected to an ash discharge baffle, the top of the ash discharge baffle is connected to a boss, one side of the first ash pushing plate and the second ash pushing plate are both connected to an extrusion plate that matches the boss, the bottom of the ash guide pipe extends into the dust guide hopper, and an air outlet is provided on the side wall of the ash falling chamber.

[0013] Furthermore, a symmetrical cleaning frame is provided on the outside of the filter bag, the cleaning frame is symmetrically in contact with the surface of the filter bag, a strip groove is provided on the top of the cleaning frame, a cleaning brush corresponding to the surface of the filter bag is connected to the top of the strip groove, the interior of the cleaning frame is hollow, the interior of the cleaning frame is connected to an external negative pressure device through a pipeline, and a suction hole connected to the interior of the cleaning frame is provided on the side wall of the strip groove; The air outlet pipe of the negative pressure device is located in the main ash hopper.

[0014] Furthermore, the four inner corners of the box are connected with inclined plane frames, the top of the inclined plane frames is rotatably connected with a reciprocating screw rod, the outer wall of the reciprocating screw rod is threadedly connected with a lifting frame, a sleeve rod is connected between two adjacent lifting frames, the outer wall of the sleeve rod is connected with a sliding frame, two symmetrical cleaning frames are slidably connected to the sliding frame, and the symmetrical cleaning frames are connected by springs; The sleeve rod is internally rotatably connected with an adjusting rod, and the outer wall of the adjusting rod is connected with an extrusion frame that matches the cleaning frame. Two adjacent adjusting rods are connected by a gear transmission structure, one of the adjusting rods is externally connected to a driving device, and multiple adjusting rods are connected by a chain transmission structure.

[0015] Furthermore, a protective frame is connected to one side of the lifting frame, one end of one of the adjusting rods is connected to a reversing gear located in the protective frame, a rack combined with the reversing gear is slidably connected to the protective frame up and down, cavities are provided at the upper and lower ends of the rack, an extrusion block is slidably connected to the cavity up and down, the extrusion block and the cavity are connected by a spring, one side of the lifting frame is connected to a bracket plate located in the protective frame, the bracket plate is provided with a fixing groove arranged up and down on the side facing the rack, a positioning block is slidably connected in the fixing groove, an oblique slide groove is provided on one side of the extrusion block, a side of the positioning block close to the extrusion block is slidably connected to the oblique slide groove, and a trigger rod corresponding to the rack is connected to the top bracket and the inclined frame on the side facing the lifting frame; A ball positioning column is arranged on one side of the bracket plate facing the rack, and a positioning hole corresponding to the ball positioning column is opened on one side of the rack.

[0016] Furthermore, a sealed telescopic tube is sleeved on the outer walls of the reciprocating screw rod and the sliding frame, and the top of the central rod and the reciprocating screw rod are connected through a chain transmission structure.

[0017] Furthermore, a fixed plate is connected to the top of the total ash hopper, the top of the air guide plate is rotatably connected to the fixed plate, an ash discharge pipe penetrating the air guide plate is slidably connected to the fixed plate, ash discharge holes are arranged on both sides of the ash discharge pipe, a guide strip is connected to the top of the air guide plate, the bottom of the guide strip is arranged toward the ash discharge hole, and a protrusion supporting the air guide plate is connected to the ash discharge pipe; The bottom of the dust guide hopper is connected with a side ash pipe, and the insides of the ash discharge pipe and the side ash pipe are connected with staggered wind shields.

[0018] Furthermore, the fixed plate at the top is connected with a support platform, the support platform and the ash discharge pipe are connected by a return spring, the outer sleeve of the return spring is provided with a sealed telescopic tube, the bottom of the dust guide bucket is connected with a connecting pipe, and the side ash pipe is sleeved in the connecting pipe; The bottom of the ash discharge pipe is connected to a knocking frame, the bottom of the knocking frame is inclined, one side of the knocking frame is connected to a support bar in contact with the bottom edge of the side ash pipe, the bottom of the center rod is connected to a lower scraper, and the top of the lower scraper is rotatably connected to a roller in contact with the knocking frame.

[0019] Compared with the existing known technologies, the technical solution provided by the present invention has the following significant effects: 1. This device can reduce the overall height of the filter by arranging multiple ash hoppers at the bottom of the total ash hopper. At the same time, it can reduce the volume of the equipment and the occupied area of ​​the equipment by cooperating with the annular bellows on the total ash hopper.

[0020] 2. This device forms a variable-diameter flow channel with a narrow inlet and a wide outlet through the coordination of the outer airflow bracket and the inner airflow bracket. It can filter the passing airflow to intercept larger dust particles in the gas and reduce the filtering amount of the top filter bag. At the same time, a structure for cleaning the dust pile is provided inside to avoid excessive accumulation of dust.

[0021] 3. This device is equipped with a cleaning rack on the outside of the filter bag, which can clean the filter bag while filtering, thereby improving the filtering efficiency. At the same time, it can collect the cleaned dust to avoid the dust from adhering to the filter bag for the second time.

[0022] 4. This device has the function of guiding the dust falling on the air guide plate by arranging an ash discharge pipe on the air guide plate to prevent it from being carried away by the rising air flow at the bottom during its downward movement. At the same time, the bottom knocking frame will come into contact with the lower scraper, which has the function of driving the ash discharge pipe to move up and down, thereby increasing the movement speed of the dust in the pipeline and avoiding dust accumulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the total ash hopper and the annular wind box in the present invention; Figure 2 It is a top view of the annular wind box and the main ash hopper structure in the present invention; Figure 3 Schematic diagram of the airflow direction in the present invention; Figure 4 It is a schematic diagram of the structure of the outer airflow bracket and the inner airflow bracket in the present invention; Figure 5 It is a schematic diagram of the first ash pushing plate in the present invention being located in the ash dropping chamber; Figure 6 It is a schematic diagram of the first splitter plate and the ash guide pipe structure in the present invention; Figure 7 It is a schematic diagram of the filter bag and lifting frame structure in the present invention; Figure 8 It is a schematic diagram of the cleaning frame and the cleaning brush structure of the present invention; Fig. 9 It is a schematic diagram of the filter bag and cleaning frame structure in the present invention; Fig.10 It is a schematic diagram of the reversing gear and rack structure in the present invention; Fig.11 It is a schematic diagram of the air guide plate and ash discharge pipe structure in the present invention.

[0024] Reference numerals: 101, box body; 102, clean air chamber; 103, total ash hopper; 104, ash hopper; 105, annular bellows; 106, air guide plate; 107, air inlet pipe; 108, first splitter plate; 109, second splitter plate; 110, top bracket; 111, filter bag; 112, outer airflow bracket; 113, inner airflow bracket; 114, variable diameter flow channel; 115, fan blade baffle; 116, center rod; 117 , centrifugal blades; 118, dust chamber; 119, dust baffle; 120, dust guide bucket; 121, dust guide pipe; 122, first dust push plate; 123, second dust push plate; 201, flow equalizing plate; 202, guide plate; 203, rotating ring; 204, dust discharge baffle; 205, boss; 206, extrusion plate; 207, air outlet; 208, cleaning rack; 209, strip groove; 210, cleaning brush; 2 11. Air suction hole; 301. Inclined frame; 302. Reciprocating screw rod; 303. Lifting frame; 304. Sleeve rod; 305. Sliding frame; 306. Adjusting rod; 307. Extrusion frame; 308. Driving motor; 309. Protective frame; 310. Reversing gear; 311. Rack; 312. Cavity; 313. Extrusion block; 314. Bracket plate; 315. Fixed groove; 316. Positioning block; 317. Oblique slide groove ; 318, trigger rod; 319, ball positioning column; 320, positioning hole; 321, sealed telescopic tube; 322, chain transmission structure; 401, fixed plate; 402, ash discharge pipe; 403, ash discharge hole; 404, guide strip; 405, bump; 406, side ash pipe; 407, wind shield; 408, support platform; 409, connecting pipe; 410, knock frame; 411, support strip; 412, lower scraper. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0026] Depend on Figures 1 to 11The invention provides a box body 101, wherein the top of the box body 101 is connected to a clean air chamber 102, one side of the clean air chamber 102 is connected to an air outlet pipe for discharging the filtered gas, the bottom of the box body 101 is connected to a total ash hopper 103, the bottom of the total ash hopper 103 is connected to a symmetrically arranged ash hopper 104, and the ash hopper 104 can be arranged in multiple numbers, such as four, six, or eight, and the top of the total ash hopper 103 is connected to an annular wind box 105, and the width of the annular wind box 105 on the side close to the air inlet pipe 107 is greater than that on the side away from the air inlet pipe 107, and most of the The divided airflow will enter the main ash hopper 103 from the side close to the air inlet pipe 107. At the same time, compared with the traditional annular wind box 105 installed on the box body 101, it can reduce the overall volume and the occupied area. The annular wind box 105 is connected to the inside of the main ash hopper 103. The inner wall of the main ash hopper 103 is connected with air guide plates 106 arranged at equal intervals. The air guide plates 106 are used to change the flow direction of the airflow, so that the larger solid particles in the airflow hit the surface of the air guide plates 106 under the action of inertia, and then separate from the airflow, and then fall down. The side wall of the annular wind box 105 is connected with an air inlet pipe 107. The dust-containing gas will first enter the annular wind box 105 through the air inlet pipe 107, and enter the inside of the ash hopper 104 from all sides, which plays a role in uniform air intake and improves the flow speed of the air flow inside. The inside of the air inlet pipe 107 is connected with a first splitter plate 108 arranged at equal intervals, and the inside of the annular wind box 105 is connected with a second splitter plate 109 for splitting. The first splitter plate 108 has a splitting effect, making the air flow more uniform. The second diverter plate 109 has a guiding function, which can make part of the air flow move toward the two sides of the main ash hopper 103, thereby reducing the pressure on the side of the main ash hopper 103 close to the air inlet pipe 107. The top of the box body 101 is connected to a top bracket 110, and the bottom of the top bracket 110 is connected to an array of filter bags 111 with equal spacing. The interior of the filter bag 111 is connected to the clean air chamber 102. The filter bag 111 is elliptical, and the elliptical filter bag 111 can better adapt to the rectangular box body 101 to increase the number of filter bags 111; During use, large dust particles will still be adsorbed on the filter bag 111 along with the airflow. Since large dust particles are large in size, they will cause the filter bag 111 to be dirty prematurely. The following provides a structure that can intercept large particles in advance: Figure 4 and Figure 5The bottom of the box 101 is connected to an outer airflow bracket 112, and an inner airflow bracket 113 is provided inside the outer airflow bracket 112. A variable diameter flow channel 114 with a narrow entrance and a wide exit is formed between the inner airflow bracket 113 and the outer airflow bracket 112. The airflow will pass through the variable diameter flow channel 114. Since the entrance of the variable diameter flow channel 114 is narrow and the exit is wide, according to the Venturi effect, when the airflow moves to the wide area, the flow velocity slows down, so that the airflow's carrying capacity for dust particles is reduced, so some large dust particles will fall into the variable diameter flow channel. The top of the inner airflow bracket 113 is connected to the wide part of the channel 114, and the top of the inner airflow bracket 113 is connected to the blade baffle 115. The interior of the total ash hopper 103 is rotatably connected to a center rod 116 extending into the clean air chamber 102. The center rod 116 is externally connected to a driving device. The outer wall of the center rod 116 is connected to a centrifugal blade 117 located below the blade baffle 115. The centrifugal blade 117 promotes the airflow. Under the action of centrifugal force, the solid and gas are separated. The separated solid dust will fall on the side of the inner airflow bracket 113 close to the centrifugal blade 117; Dust particles are attached to the side of the inner airflow support 113 close to the centrifugal blades 117. As the dust accumulates, the weight increases and eventually falls into the variable diameter flow channel 114 at the bottom, and is adsorbed on the filter bag 111 again as the airflow moves. The following provides a structure that can clean the dust: Figure 4 and Figure 5 The inner airflow support 113 is provided with an ash falling chamber 118 inside. As the dust accumulates, it will slide into the ash falling chamber 118 at the bottom. The top opening of the ash falling chamber 118 is set toward the centrifugal blades 117 to facilitate the entry of dust particles. The widened part of the variable diameter flow channel 114 is provided with a dust baffle 119. The dust baffle 119 is provided with filter holes to intercept the dust particles in the variable diameter flow channel 114 again. The top four corners of the total ash hopper 103 are connected with dust guide buckets 120. The widened part of the ash falling chamber 118 and the variable diameter flow channel 114 is connected with an ash guide pipe 121. One end of the ash guide pipe 121 extends to the dust guide bucket 1 20, the captured dust particles will first be transported to the dust guide bucket 120, and then transported to the bottom of the main ash hopper 103 through the dust guide bucket 120. The outer edge of the centrifugal blade 117 is connected to the first ash pushing plate 122 located in the ash falling chamber 118. When the centrifugal blade 117 rotates, it will drive the first ash pushing plate 122 to rotate, thereby pushing the dust pile collected in the ash falling chamber 118 into the ash guide pipe 121. The variable diameter flow channel 114 is rotatably connected to the second ash pushing plate 123 in contact with the dust baffle 119. The rotating second ash pushing plate 123 can clean the dust baffle 119, so as to push the collected dust pile to the ash guide pipe 121.

[0027] The airflow flowing out of the variable diameter flow channel 114 is annular. During the upward movement, the filtering pressure of some filter bags 111 will be too large, and the filtering efficiency of the filter bags 111 near the center is low. The following provides a structure for making the airflow move evenly toward the filter bags 111: Specifically, refer to Figure 4 and Figure 5 , the outer wall of the center rod 116 is connected to a flow equalizing plate 201 located above the fan blade baffle 115, and the flow equalizing plate 201 is provided with an evenly spaced array of guide plates 202. The flow equalizing plate 201 will rotate with the center rod 116, and the airflow will gradually come into contact with the guide plates 202 at different heights during the flow, so that the airflow can be divided into multiple streams, which plays a role of diversion. The guide plates 202 on the flow equalizing plate 201 are gradually arranged downward toward the axis, and the bottom of the flow equalizing plate 201 is connected to a rotating ring 203 rotatably connected to the dust baffle 119, and the second dust pushing plate 123 is connected to the rotating ring 203 at equal intervals. Since the second dust pushing plate 123 connecting frame is fixed to the top flow equalizing plate 201, the rotating ring 203 blocks the gap between the dust baffle 119 and the outer airflow bracket 112 to prevent air from flowing out of the gap; The ash guide pipe 121 is used to discharge dust. There will be a situation where airflow enters the ash guide pipe 121. The airflow entering the ash guide pipe 121 will flow back into the main ash hopper 103, causing the bottom dust to be swirled again. The following provides a structure that opens the inlet only when the first diverter plate 108 or the second diverter plate 109 is close: Figure 5 and Figure 6 The top of the ash guide pipe 121 is rotatably connected with an ash discharge baffle 204, and a torsion spring is provided at the hinge of the ash discharge baffle 204 and the ash guide pipe 121, so that the ash discharge baffle 204 can cover the top of the ash guide pipe 121, and the top of the ash discharge baffle 204 is connected with a boss 205, and one side of the first ash pushing plate 122 and the second ash pushing plate 123 are both connected with an extrusion plate 206 that can contact the boss 205. When the first ash pushing plate 122 or the second ash pushing plate 123 pushes the dust to move , one side extrusion plate 206 will first come into contact with the boss 205, thereby opening the ash discharge baffle 204, and the dust pile at the top of the ash discharge baffle 204 will fall into the inlet ash guide pipe 121. The bottom of the ash guide pipe 121 extends to the dust guide bucket 120. The side wall of the ash falling chamber 118 is provided with an air outlet 207. The airflow entering the ash falling chamber 118 cannot be discharged, which will affect the accumulation of internal dust and the flow of subsequent airflow. The air outlet 207 can discharge the incoming airflow.

[0028] As the filter bag 111 is used, a large amount of dust particles will accumulate on the surface of the filter bag 111, which requires regular shutdown and cleaning. The cleaned dust will fall to the bottom of the box 101 and will be adsorbed on the filter bag 111 again as the airflow moves. The following provides a structure that can collect the cleaned dust: Figures 7 to 9 Specifically, a symmetrical cleaning rack 208 is provided on the outside of the filter bag 111. The cleaning rack 208 is symmetrically in contact with the surface of the filter bag 111. The cleaning rack 208 is located on the outside of the filter bag 111. A strip groove 209 is provided on the top of the cleaning rack 208. A cleaning brush 210 corresponding to the surface of the filter bag 111 is connected to the top of the strip groove 209. When the cleaning rack 208 moves up and down, the cleaning brush 210 on the top can clean the filter bag 111. The interior is hollow, and the cleaning rack 208 is connected to a negative pressure device through a pipeline. The cleaned dust particles are sucked away by the negative pressure device and then transported back to the dust pile at the bottom. The negative pressure device is an existing device, which extracts the gas in the space by exhausting air. The side wall of the strip groove 209 is provided with a suction hole 211 connected to the interior of the cleaning rack 208. The dust particles cleaned by the cleaning brush 210 will enter the negative pressure device through the suction hole 211 and then be transported back to the main ash hopper 103. The air outlet pipe of the negative pressure device is located in the main ash hopper 103. In another embodiment, the dust particles entering the negative pressure device are collected and stored separately.

[0029] When the cleaning rack 208 moves upward, it can clean the filter bag 111. When it moves downward, it opens to avoid contact between the bottom and the filter bag 111, thereby reducing the impact on the filter bag 111. The following provides a structure that can drive the cleaning rack 208 to move: Figures 7 to 9 Specifically, the four inner corners of the box body 101 are connected with an inclined frame 301, and the top of the inclined frame 301 is rotatably connected with a reciprocating screw rod 302, and the outer wall of the reciprocating screw rod 302 is transmission-connected with a lifting frame 303, and the cleaning frame 208 located outside the filter bag 111 is arranged on the lifting frame 303, and the filter bag 111 is cleaned by the up and down movement of the lifting frame 303. A sleeve rod 304 is connected between two adjacent lifting frames 303, and a sliding frame 305 is connected to the outer wall of the sleeve rod 304. The symmetrical cleaning frames 208 are slidably connected to the sliding frame 305, and the symmetrical cleaning frames 208 are connected by springs. When the symmetrical cleaning frames 208 are not subjected to force, the springs will push the cleaning frames 208 to both sides so that the cleaning frames 208 do not contact the filter bag 111; refer to Figure 8The inner part of the sleeve rod 304 is rotatably connected with an adjustment rod 306, and the outer wall of the adjustment rod 306 is connected with an extrusion frame 307 that can contact the cleaning frame 208. The extrusion frame 307 is sleeved in the sleeve rod 304, but the bottom of the sleeve rod 304 is provided with an opening, which does not affect the rotation of the extrusion frame 307. When the two extrusion frames 307 rotate toward the filter bag 111, the cleaning frame 208 will be pushed to be clamped on the outer wall of the filter bag 111. The adjustment rod 306 can drive the two extrusion frames 307 to rotate, thereby controlling multiple cleaning frames 208. When the symmetrical extrusion frames 307 rotate toward the middle, the cleaning frame 208 will be pushed toward the filter bag. 111 moves, thereby clamping the filter bag 111, two adjacent adjustment rods 306 are connected by a gear transmission structure, one of the adjustment rods 306 is externally connected to a driving device, and the adjustment rod 306 is rotated by the external driving device, and the driving device drives one adjustment rod 306 to rotate, and the other end of the adjustment rod 306 drives the other adjustment rod 306 to rotate in the opposite direction through the meshing of gears, thereby squeezing the symmetrical cleaning frame 208 toward the middle, and multiple adjustment rods 306 are connected by a chain transmission structure 322 to drive multiple adjustment rods 306 to rotate.

[0030] In the process of the lifting frame 303 moving up and down, the rotation direction of the adjustment rod 306 needs to be changed to control the movement of the cleaning frame 208. The following provides a structure that can automatically drive the adjustment rod 306 to rotate: Specifically, refer to Fig.10A protective frame 309 is connected to one side of the lifting frame 303, and the protective frame 309 protects the internal reversing gear 310 and the rack 311. One end of one of the adjustment rods 306 is connected to the reversing gear 310 located in the protective frame 309. A rack 311 combined with the reversing gear 310 is connected to the protective frame 309 to slide up and down. When the rack 311 moves up and down, it can drive the adjustment rod 306 to rotate through the reversing gear 310. The up and down movement of the rack 311 A cavity 312 is provided at both ends, and an extrusion block 313 is slidably connected to the cavity 312 up and down. The extrusion block 313 and the cavity 312 are connected by a spring, and the spring pushes the cavity 312 out of the cavity 312. A blocking structure is provided on the cavity 312 to prevent the extrusion block 313 from completely running out of the cavity 312. A support plate 314 located in the protective frame 309 is connected to one side of the lifting frame 303. The support plate 314 is provided with a fixed structure arranged up and down on the side facing the rack 311. The fixing groove 315 is provided with a positioning block 316 in a sliding connection therein. One side of the extrusion block 313 is provided with an oblique groove 317. When the extrusion block 313 is pressed back into the cavity 312, the positioning block 316 can be pulled into the cavity 312 through the oblique groove 317. At this time, the positioning block 316 is also pulled out of the fixing groove 315, thereby losing the fixing ability to the rack 311. One side of the positioning block 316 is slidably connected to the oblique groove 317. The top bracket 110 and the oblique groove 317 are A trigger rod 318 corresponding to the rack 311 is connected to the side of the face frame 301 facing the lifting frame 303. The trigger rod 318 is provided at both the upper and lower ends of the box body 101. When the lifting frame 303 moves to the upper end or the lower end, the extrusion block 313 in the rack 311 will first contact the trigger rod 318, thereby first releasing the restriction of the rack 311 from the bracket plate 314. As the lifting frame 303 continues to move, the rack 311 will be squeezed, thereby driving the reversing gear 310 to rotate. When the rack 311 moves up and down, the movement may be unstable, or the rack 311 may move as soon as it is unlocked. The following provides a structure for pre-fixing the rack 311: Fig.10 A ball positioning column 319 is provided on one side of the bracket plate 314 facing the rack 311, and a positioning hole 320 corresponding to the ball positioning column 319 is opened on one side of the rack 311. The positioning hole 320 is located on both sides of the upper and lower sides of the rack 311. When the rack 311 moves to the top, the ball positioning column 319 will be inserted into the positioning hole 320 at the bottom. When the rack 311 is unlocked and moved to the bottom, the ball positioning column 319 will be inserted into the positioning hole 320 at the top.

[0031] Since there is a lot of dust in the box 101, it is easy to adhere to the reciprocating screw rod 302, the sliding frame 305 and other structures. The following provides a structure for protecting it: Figure 8 and Fig. 9 Specifically, a sealed telescopic tube 321 is sleeved on the outer wall of the reciprocating screw rod 302 and the sliding frame 305. The sealed telescopic tube 321 is an existing folding telescopic tube structure, which will not be described in detail here. The top of the center rod 116 and the reciprocating screw rod 302 are connected by a chain transmission structure 322. When the center rod 116 rotates, it can drive the reciprocating screw rod 302 to rotate, thereby driving the lifting frame 303 to move up and down.

[0032] After the newly entered airflow hits the air guide plate 106, it will be separated from the airflow and fall on the air guide plate 106 below. The dust falling on the air guide plate 106 will come into contact with the airflow flowing upward from below during the downward sliding process, and will move again with the airflow. The following provides a structure to prevent dust from coming into contact with the bottom airflow during the movement process: Fig.11 Specifically, a fixed plate 401 is connected to the top of the total ash hopper 103, the top of the air guide plate 106 is rotatably connected to the fixed plate 401, and the higher end of the air guide plate 106 is hinged to the fixed plate 401, so that the air guide plate 106 can swing up and down, and an ash discharge pipe 402 that passes through the air guide plate 106 is slidably connected to the fixed plate 401, and ash discharge holes 403 are arranged on both sides of the ash discharge pipe 402. A guide strip 404 is connected to the top of the air guide plate 106, and the bottom of the guide strip 404 is arranged toward the ash discharge hole 403. The dust falling on the air guide plate 106 will be guided to the ash discharge pipe 402 by the guide strip 404, and enter the ash discharge pipe 402 through the ash discharge hole 403. The ash discharge pipe 402 directly passes through multiple air guide plates 106, and thus falls on the dust pile at the bottom. The ash discharge pipe 402 is connected with a protrusion 405 for supporting the air guide plate 106. The protrusion 405 is located on the upper and lower sides of the air guide plate 106. When the ash discharge pipe 402 moves up and down, it will drive the air guide plate 106 to swing up and down, thereby accelerating the movement speed of the dust on the air guide plate 106; The ash guide pipe 121 is constantly opened and closed, and part of the airflow still enters the ash guide pipe 121, and then moves to the dust pile at the bottom through the dust guide bucket 120, causing the dust at the bottom to sway. The following provides a structure to slow down the flow of airflow: Fig.11 The bottom of the dust guide bucket 120 is connected with a side ash pipe 406, and the side ash pipe 406 is used to discharge the dust in the dust guide bucket 120. The ash discharge pipe 402 and the side ash pipe 406 are internally connected with staggered wind shields 407. When the airflow flows in the ash discharge pipe 402, it will hit the wind shield 407 to reduce the mobility of the airflow. The wind shields 407 are staggered and do not completely block the inside of the pipe, so that the internal dust can slide from the wind shield 407 on one side to the other wind shield 407, and finally fall on the dust pile at the bottom.

[0033] The ash discharge pipe 402 needs to move up and down to drive the air guide plate 106 to shake. The following provides a structure that allows the ash discharge pipe 402 to shake up and down repeatedly: Figure 3 and Fig.11 Specifically, a support platform 408 is connected to the fixed plate 401 at the top, and the support platform 408 and the ash discharge pipe 402 are connected by a return spring. When the ash discharge pipe 402 moves up and down, it will be pulled back by the return spring. Through the expansion and contraction of the return spring, the ash discharge pipe 402 is shaken up and down to speed up the movement of internal dust. The outer sleeve of the return spring is provided with a sealing expansion tube 321 to protect the return spring. The bottom of the dust guide bucket 120 is connected to a connecting pipe 409, and the side ash pipe 406 is sleeved in the connecting pipe 409. The side ash pipe 406 can slide up and down in the connecting pipe 409, thereby speeding up the movement of internal dust. When the ash discharge pipe 402 shakes up and down, a driving source is required to make it move. The following provides a structure for driving the ash discharge pipe 402 to move up and down: Figure 3 and Fig.11 The bottom of the ash discharge pipe 402 is connected to a knocking frame 410, and the bottom of the knocking frame 410 is inclined, and the direction of inclination is opposite to the rotation direction of the center rod 116. For example, when the center rod 116 rotates clockwise, the inclined surface of the bottom of the knocking frame 410 is set counterclockwise. When the lower scraper 412 rotates to the bottom of the knocking frame 410, the knocking frame 410 will move upward through the inclined surface. When the lower scraper 412 is separated from the knocking frame 410, the knocking frame 410 will fall back to its original position due to gravity, thereby driving the knocking frame 410 to move up and down. One side of the knocking frame 410 is connected to a support bar 411 that contacts the bottom edge of the side ash pipe 406. When the knocking frame 410 moves up and down, the side ash pipe 406 will be driven upward through the support bar 411 The lower scraper 412 is connected to the bottom of the center rod 116, and the lower scraper 412 rotates with the center rod 116. Because the dust will slide downward along the inner wall of the main ash hopper 103, dust will accumulate on the inner wall, thereby affecting the downward flow of the dust. The rotating lower scraper 412 can level the accumulated dust. The top of the lower scraper 412 is rotatably connected to a roller in contact with the knocking frame 410. Since the bottom of the lower scraper 412 is provided with an inclined surface, when it rotates to the side of the knocking frame 410, the knocking frame 410 will be pushed upward for a distance through the inclined surface. When the lower scraper 412 is separated from the knocking frame 410, the knocking frame 410 will fall and reset. The movement of the internal dust is accelerated by the up and down movement.

[0034] Specifically, refer to Figure 3A driving motor 308 is connected to the top of the clean air chamber 102. The output end of the driving motor 308 and the center rod 116 are connected via a chain transmission structure 322, and the center rod 116 is driven to rotate via the chain transmission structure 322.

[0035] When the present invention is in use, a main ash hopper 103 is provided at the bottom of the box body 101, etc., and a plurality of ash hoppers 104 are provided at the bottom of the main ash hopper 103, which has the effect of reducing the overall height of the equipment. The annular bellows 105 is provided on the top of the main ash hopper 103, rather than on the box body 101, which has the effect of reducing the overall size of the equipment.

[0036] The gas to be filtered will enter the annular bellows 105 through the air inlet pipe 107, and through the annular setting of the annular bellows 105, it can enter the main ash hopper 103 from all sides. Some large particles of dust will hit the air guide plate 106, and then enter the ash discharge pipe 402, and then move to the fly ash pile at the bottom. The airflow passing through the air guide plate 106 will be thrown to the inner airflow support 113 by the centrifugal blades 117, and then pass through the variable diameter flow channel 114, so as to intercept large particles of dust in the airflow and reduce the dust content in the airflow. The airflow that continues to move upward will be filtered by the filter bag 111, and then discharged from the air outlet pipe on one side of the clean air chamber 102. When the driving motor 308 drives the central rod 116 to rotate, it will drive the cleaning frame 208 on the outer wall of the filter bag 111 to clean, which has the effect of filtering and cleaning.

[0037] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A pulverized coal bag filter, comprising a box (101), wherein the top of the box (101) is connected to a clean air chamber (102), characterized in that: The bottom of the box body (101) is connected to a main ash hopper (103), the bottom of the main ash hopper (103) is connected to a symmetrically arranged ash distribution hopper (104), the top of the main ash hopper (103) is connected to an annular wind box (105), the annular wind box (105) and the interior of the main ash hopper (103) are connected, the inner wall of the main ash hopper (103) is connected to air guide plates (106) arranged at equal intervals, and the side wall of the annular wind box (105) is connected to an air inlet pipe (106). 7), the interior of the air inlet pipe (107) is connected to a first flow divider plate (108) arranged at equal intervals, the interior of the annular wind box (105) is connected to a second flow divider plate (109) for flow diversion, the top of the box body (101) is connected to a top bracket (110), the bottom of the top bracket (110) is connected to an array of filter bags (111) arranged at equal intervals, the interior of the filter bag (111) is connected to the clean air chamber (102), and the filter bag (111) is elliptical; The main ash hopper (103) is rotatably connected to a center rod (116) extending into the clean air chamber (102); the center rod (116) is externally connected to a driving device; and the outer wall of the center rod (116) is connected to a centrifugal blade (117); An inner airflow support (113) is arranged coaxially with the centrifugal blade (117) in the box body (101); an ash falling chamber (118) is provided inside the inner airflow support (113); the top opening of the ash falling chamber (118) is arranged toward the centrifugal blade (117); and dust guide hoppers (120) are connected to the four corners of the top of the main ash hopper (103).

2. A pulverized coal bag filter according to claim 1, characterized in that: The interior of the box body (101) is connected to an outer airflow support (112) located outside the inner airflow support (113); a variable diameter flow channel (114) having a narrow entrance and a wide exit is formed between the inner airflow support (113) and the outer airflow support (112); a fan blade baffle (115) located above the centrifugal blade (117) is connected to the top of the inner airflow support (113); a dust baffle (119) is provided at the widening portion of the variable diameter flow channel (114); an ash guide pipe (121) is connected to the widening portion of the ash falling chamber (118) and the variable diameter flow channel (114); an outer edge of the centrifugal blade (117) is connected to a first ash pushing plate (122) located in the ash falling chamber (118); and a second ash pushing plate (123) rotatably connected to the variable diameter flow channel (114) and in contact with the dust baffle (119).

3. A pulverized coal bag filter according to claim 2, characterized in that: The outer wall of the center rod (116) is connected to a flow balancing plate (201) located above the fan blade baffle (115); an array of guide plates (202) with equal spacing is arranged on the flow balancing plate (201); the guide plates (202) on the flow balancing plate (201) are arranged gradually downward toward the axis of the flow balancing plate (201); the bottom of the flow balancing plate (201) is connected to a rotating ring (203) rotatably connected to the dust baffle (119); and the second dust pushing plates (123) are connected to the rotating ring (203) at equal spacings; The top of the ash guide pipe (121) is rotatably connected to an ash discharge baffle (204), the top of the ash discharge baffle (204) is connected to a boss (205), one side of each of the first ash pushing plate (122) and the second ash pushing plate (123) is connected to an extrusion plate (206) that matches the boss (205), the bottom of the ash guide pipe (121) extends into the dust guide hopper (120), and an air outlet hole (207) is provided on the side wall of the ash falling chamber (118).

4. A pulverized coal bag filter according to claim 3, characterized in that: A symmetrical cleaning frame (208) is provided on the outside of the filter bag (111), the cleaning frame (208) is symmetrically in contact with the surface of the filter bag (111), a strip groove (209) is provided on the top of the cleaning frame (208), a cleaning brush (210) corresponding to the surface of the filter bag (111) is connected to the top of the strip groove (209), the interior of the cleaning frame (208) is hollow, the interior of the cleaning frame (208) is externally connected to a negative pressure device through a pipeline, and a suction hole (211) connected to the interior of the cleaning frame (208) is provided on the side wall of the strip groove (209); The air outlet pipe of the negative pressure device is located in the main ash hopper (103).

5. A pulverized coal bag filter according to claim 4, characterized in that: The four inner corners of the box body (101) are all connected to an inclined frame (301), the top of the inclined frame (301) is rotatably connected to a reciprocating screw rod (302), a lifting frame (303) is threadedly connected to the outer wall of the reciprocating screw rod (302), a sleeve rod (304) is connected between two adjacent lifting frames (303), a sliding frame (305) is connected to the outer wall of the sleeve rod (304), two symmetrical cleaning frames (208) are slidably connected to the sliding frame (305), and the symmetrical cleaning frames (208) are connected to each other via a spring; The sleeve rod (304) is internally rotatably connected to an adjustment rod (306); an outer wall of the adjustment rod (306) is connected to an extrusion frame (307) that matches the cleaning frame (208); two adjacent adjustment rods (306) are connected via a gear transmission structure; one of the adjustment rods (306) is externally connected to a driving device; and a plurality of the adjustment rods (306) are connected via a chain transmission structure (322).

6. A pulverized coal bag filter according to claim 5, characterized in that: One side of the lifting frame (303) is connected to a protective frame (309), one end of one of the adjustment rods (306) is connected to a reversing gear (310) located in the protective frame (309), a rack (311) coupled to the reversing gear (310) is slidably connected in the protective frame (309) up and down, cavities (312) are provided at the upper and lower ends of the rack (311), an extrusion block (313) is slidably connected in the cavity (312), the extrusion block (313) and the cavity (312) are connected via a spring, and one side of the lifting frame (303) is connected to a reversing gear (310) located in the protective frame (309). A support plate (314) in the protective frame (309), wherein a fixing groove (315) arranged up and down is provided on a side of the support plate (314) facing the rack (311), a positioning block (316) is slidably connected in the fixing groove (315), an oblique sliding groove (317) is provided on one side of the extrusion block (313), a side of the positioning block (316) close to the extrusion block (313) is slidably connected to the oblique sliding groove (317), and a trigger rod (318) corresponding to the rack (311) is connected to the top support (110) and the inclined frame (301) on a side facing the lifting frame (303); A ball positioning column (319) is provided on one side of the bracket plate (314) facing the rack (311), and a positioning hole (320) corresponding to the ball positioning column (319) is opened on one side of the rack (311).

7. A pulverized coal bag filter according to claim 6, characterized in that: A sealed telescopic tube (321) is sleeved on the outer walls of the reciprocating screw rod (302) and the sliding frame (305), and the top of the central rod (116) and the reciprocating screw rod (302) are connected via a chain transmission structure (322).

8. A pulverized coal bag filter according to claim 7, characterized in that: The top of the main ash hopper (103) is connected to a fixed plate (401), the top of the air guide plate (106) is rotatably connected to the fixed plate (401), an ash discharge pipe (402) penetrating the air guide plate (106) is slidably connected to the fixed plate (401), ash discharge holes (403) are arranged on both sides of the ash discharge pipe (402), the top of the air guide plate (106) is connected to a guide bar (404), the bottom of the guide bar (404) is arranged toward the ash discharge hole (403), and the ash discharge pipe (402) is connected to a protrusion (405) supporting the air guide plate (106); The bottom of the dust guide hopper (120) is connected to a side ash pipe (406), and the insides of the ash discharge pipe (402) and the side ash pipe (406) are connected to staggered windshields (407).

9. A pulverized coal bag filter according to claim 8, characterized in that: The fixing plate (401) at the top is connected to a support platform (408), the support platform (408) and the ash discharge pipe (402) are connected via a return spring, the outer sleeve of the return spring is provided with a sealing telescopic tube (321), the bottom of the dust guide bucket (120) is connected to a connecting tube (409), and the side ash pipe (406) is sleeved in the connecting tube (409); The bottom of the ash discharge pipe (402) is connected to a knocking frame (410), the bottom of the knocking frame (410) is inclined, one side of the knocking frame (410) is connected to a support bar (411) in contact with the bottom edge of the side ash pipe (406), the bottom of the center rod (116) is connected to a lower scraper (412), and the top of the lower scraper (412) is rotatably connected to a roller in contact with the knocking frame (410).

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