Dust removal device and method for thermal power plant

Abstract

The invention relates to the technical field of power plant dedusting, in particular to a thermal power plant dedusting device and method. The thermal power plant dedusting device comprises a dedusting box, a filter plate, a liquid inlet pipe, a flow guide ring, a rotating sleeve, blades, a filter cartridge and the like; a filter plate used for filtering large dust particles is arranged in the dust removal box, a water supply channel is formed in the filter plate, a liquid inlet pipe is fixedly connected to the dust removal box and communicates with the water supply channel, a flow guide ring is fixedly connected to the other end of the liquid inlet pipe in a communicating mode, a filter cylinder used for filtering small dust particles is rotationally connected to the flow guide ring, and a rotating sleeve is rotationally connected to an air outlet of the dust removal box. A plurality of blades distributed circumferentially are fixedly connected to the rotating sleeve and located in a flow guide groove formed in the flow guide ring, and water in the water supply channel can flow into the flow guide groove so as to push the rotating sleeve to rotate through the blades. In the shaking process of the filter plate, water can be automatically conveyed into the water supply channel by utilizing structures such as a piston rod and a pressurizing pipe, so that the filter plate and waste gas can be primarily cooled, and the filter cartridge can be pushed to rotate through water.

Description

Technical Field

[0001] The invention relates to the technical field of dust removal in power plants, and in particular to a dust removal device and method for a thermal power plant. Background Art

[0002] In thermal power plants, pulverized coal boilers provide a large amount of heat energy for power generation by feeding pulverized coal into the furnace for efficient combustion. However, during the combustion process, a large amount of exhaust gas containing large dust particles is generated due to incomplete combustion of the pulverized coal and the production of coal ash.

[0003] The dust removal equipment commonly used in power plants mainly includes electrostatic precipitators, bag dust collectors and wet dust collectors. Bag dust collectors filter dust-containing gases through filter bags, but the filter bags of traditional bag dust collectors are usually fixedly installed, resulting in the exhaust gas only fully contacting with local areas of the filter bags during use, causing uneven wear of the filter bags. The filtering performance of the filter bags cannot be fully utilized, and large dust particles directly hit the filter bags, which will accelerate the wear of the filter bags and shorten the service life of the filter bags. Summary of the invention

[0004] In order to overcome the shortcomings in the prior art that the exhaust gas is only fully in contact with a local area of ​​the filter bag, resulting in uneven wear of the filter bag, the filtering performance of the filter bag cannot be fully utilized, and large dust particles directly hit the filter bag, which will accelerate the wear of the filter bag and shorten the service life of the filter bag, the present invention provides a dust removal device and method for a thermal power plant.

[0005] The technical solution is: a dust removal device for a thermal power plant, including a dust removal box, a filter plate, a liquid inlet pipe, a guide ring, a rotating sleeve, blades, a filter cartridge and a liquid outlet pipe. A filter plate for filtering large dust particles is arranged in the dust removal box, and a water supply channel is opened in the filter plate. A liquid inlet pipe is fixedly connected to the dust removal box, and the liquid inlet pipe and the water supply channel are connected. The other end of the liquid inlet pipe is connected and fixedly connected with a guide ring. A filter cartridge for filtering small dust particles is rotatably connected to the guide ring. The air outlet position of the dust removal box is rotatably connected to a rotating sleeve. A plurality of circumferentially distributed blades are fixedly connected to the rotating sleeve, and the blades are located in a guide groove opened on the guide ring. Water in the water supply channel can flow into the guide groove to drive the rotating sleeve to rotate through the blades. When the rotating sleeve rotates, it will drive the filter cartridge to rotate synchronously. The guide ring is connected with a liquid outlet pipe for water supply discharge.

[0006] Furthermore, it also includes a shaking mechanism for achieving self-cleaning of the filter plate, the shaking mechanism includes a top plate, the top plate is slidably connected in the dust removal box, a small bracket for guiding the top plate is fixedly connected to the dust removal box, and a No. 1 spring for pushing it to reset is sleeved on the top plate, a slideway is opened on the top plate, a convex rod is fixedly connected to the filter plate, the convex rod is located in the slideway, and when the top plate moves, the filter plate will be driven to shake through the convex rod.

[0007] Furthermore, it also includes a water supply mechanism for delivering water to the water supply channel, the water supply mechanism includes a water tank, the water tank is fixedly connected to the dust removal box, a pressure pipe and a water pipe are fixedly connected in the water tank, a piston rod is slidably connected to the pressure pipe, the piston rod passes through the dust removal box and is fixedly connected to the filter plate, an opening for absorbing water is opened on the pressure pipe, one end of the pressure pipe is connected to the water pipe, and a one-way valve is installed in the pressure pipe and the water pipe, so that the piston rod can push the water in the water tank into the water pipe when pulling and pulling, and the other end of the water pipe is connected to the water supply channel.

[0008] Furthermore, it also includes a main push block and an auxiliary push block for facilitating the rotating sleeve to drive the filter cartridge to rotate. The main push block is fixedly connected to the rotating sleeve, and the auxiliary push block is fixedly connected to the filter cartridge. The main push block and the auxiliary push block are at the same height.

[0009] Furthermore, it also includes a cleaning mechanism for cleaning the surface of the filter plate, the cleaning mechanism includes a reciprocating screw, a reciprocating screw is rotatably connected in the dust removal box, a slider is threadedly connected to the reciprocating screw, a slag cleaning guide rod for guiding the slider is fixed to the dust removal box, a scraper shell is slidably connected to the slider, a No. 2 spring is sleeved on the guide rod slidably connecting the scraper shell and the slider, a small support rod is fixed to the slider, and a slag pushing plate is fixed to the small support rod, and when the slider moves downward relative to the scraper shell, the slag pushing plate will push out the dust particles on the inner wall of the scraper shell.

[0010] Furthermore, it also includes a top block for pushing the top plate to move, the top block is fixedly connected to the scraper shell, one end of the top plate facing the top block is wavy, and the top block and the top plate are squeezed and matched.

[0011] Furthermore, it also includes a material receiving mechanism for collecting the cleaned dust particles, the material receiving mechanism includes a slag collecting box, a slag collecting box is arranged below the dust removal box, a through hole connected to the slag collecting box is opened on the dust removal box, a sliding frame is slidably connected to the through hole through a material receiving guide rod, a partition plate for isolating the connection between the slag collecting box and the dust removal box is fixedly connected to the sliding frame, and a No. 3 spring for pushing the partition plate to reset upward is provided on the material receiving guide rod.

[0012] Furthermore, it also includes a safety mechanism for automatically disassembling the filter cartridge, the safety mechanism includes a clamping block, the filter cartridge is slidably connected with the clamping block, a pull plate is fixedly connected to the guide rod to which the clamping block and the filter cartridge are slidably connected, the pull plate is located in a ventilation groove opened on the inner wall of the filter cartridge, when the suction force inside the filter cartridge is large, the clamping block will retract by attracting the pull plate, an annular clamping groove for the clamping block to be engaged is opened on the inner wall of the guide ring, so as to realize the rotational connection between the filter cartridge and the guide ring, and a No. 4 spring is sleeved on the guide rod to which the clamping block and the filter cartridge are slidably connected.

[0013] Furthermore, it also includes a smoke shield plate for preventing smoke from drifting, and the smoke shield plate is rotatably connected in the dust removal box.

[0014] A dust removal method for a dust removal device in a thermal power plant, specifically comprising the following steps:

[0015] In the first step, use the filter plate to filter the large dust particles in the exhaust gas;

[0016] The second step is to use a filter cartridge to filter small dust particles in the exhaust gas;

[0017] The third step is to control the rotation of the filter cartridge to fully utilize its filtering performance;

[0018] The fourth step is to discharge the filtered exhaust gas.

[0019] The beneficial effects are as follows: 1. During the shaking process of the filter plate, water can be automatically delivered to the water supply channel by means of structures such as the piston rod and the pressure pipe, which can not only play a preliminary cooling effect on the filter plate and the exhaust gas, but also can drive the filter cartridge to rotate through the water, so that the exhaust gas can fully contact the filter surface of the filter cartridge, making full use of the filtering performance of the filter cartridge, and part of the water can be sprayed out from the atomizing nozzle to humidify and cool down the exhaust gas after dust removal, thereby improving the desulfurization efficiency of the exhaust gas in the wet desulfurization process;

[0020] 2. Use the filter plate to filter large dust particles in the exhaust gas to prevent large dust particles from directly hitting the filter cartridge and causing wear. The shaking of the filter plate helps the large dust particles on the surface and stuck on the edge of the filter hole to loosen and fall off, maintaining the air permeability and interception efficiency of the filter plate and realizing the self-cleaning function of the filter plate.

[0021] 3. When the scraper shell moves down, it can clean the dust particles on the surface of the filter plate to prevent dust particles from accumulating on the surface of the filter plate and causing blockage. In addition, through the cooperation of the slag pushing plate and the partition plate, it can not only push the cleaned dust into the slag collecting box, but also always block the connection between the slag collecting box and the dust removal box to prevent the dust particles in the slag collecting box from drifting into the dust removal box. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the cross-sectional structure of the dust removal box of the present invention.

[0024] Figure 3 It is a schematic diagram of the position relationship of the pressurized pipe of the present invention.

[0025] Figure 4 It is a schematic diagram of the cross-sectional structure of the filter plate of the present invention.

[0026] Figure 5 It is a schematic diagram of the top plate structure of the present invention.

[0027] Figure 6 It is a schematic diagram of the cross-sectional structure of the guide ring of the present invention.

[0028] Figure 7 It is a schematic diagram of the cross-sectional structure of the filter cartridge of the present invention.

[0029] Figure 8 It is a schematic diagram of the internal structure of the slag collecting shell of the present invention.

[0030] Fig. 9 It is a schematic diagram of the position relationship of the partition board of the present invention.

[0031] Parts names and serial numbers in the figure: 1. Dust removal box; 101. Filter plate; 102. Water supply channel; 103. Liquid inlet pipe; 104. Guide ring; 105. Rotating sleeve; 106. Blade; 107. Filter cartridge; 108. Liquid outlet pipe; 109. Guide groove; 2. Small bracket; 201. Top plate; 202. No. 1 spring; 203. Slideway; 204. Protruding rod; 3. Water tank; 301. Pressurized pipe; 302. Piston rod; 303. Water pipe; 304. Main push block; 305. Auxiliary push block; 4. Reciprocating screw; 401. Sliding block; 402. Slag scraper Shell; 403, No. 2 spring; 404, small support rod; 405, slag pushing plate; 406, top block; 407, slag cleaning guide rod; 5, slag collecting box; 501, material collecting guide rod; 502, sliding frame; 503, partition plate; 504, No. 3 spring; 6, ventilation slot; 601, pull plate; 602, No. 4 spring; 603, clamping block; 604, clamping slot; 7, smoke baffle; 8, servo motor; 801, main transmission rod; 802, auxiliary transmission rod; 803, gear set; 804, blowing pipe; 805, impeller; 9, humidification hole; 901, atomizing nozzle. DETAILED DESCRIPTION

[0032] The preferred technical solutions of the present invention are described in detail below with reference to the accompanying drawings.

[0033] Embodiment 1: A dust removal device for a thermal power plant, such as Figure 1 , Figure 2 , Figure 4 and Figure 6As shown, it includes a dust removal box 1, a filter plate 101, a water supply channel 102, a liquid inlet pipe 103, a guide ring 104, a rotating sleeve 105, blades 106, a filter cartridge 107, a liquid outlet pipe 108, a blowing pipe 804 and an impeller 805. The right end of the dust removal box 1 is provided with an air inlet, the upper end of the dust removal box 1 is provided with an air outlet, and the air outlet of the dust removal box 1 is rotatably connected with an impeller 805 for exhausting air to the outside. The dust removal box 1 is vertically provided with a filter plate 101, and the filter plate 101 is located between the air outlet and the air inlet of the dust removal box 1, so that the large dust particles in the exhaust gas can be filtered through the filter plate 101 first, and the filter plate A water supply channel 102 is provided in 101, a liquid inlet pipe 103 is fixedly connected to the dust removal box 1, one end of the liquid inlet pipe 103 is connected to the upper end of the water supply channel 102, and the other end of the liquid inlet pipe 103 is connected to a guide ring 104, and a filter cartridge 107 for filtering small dust particles is rotatably connected to the guide ring 104. A rotating sleeve 105 is rotatably connected to the air outlet of the dust removal box 1, and the lower end of the rotating sleeve 105 is in contact with the upper end of the filter cartridge 107, and the guide ring 104 is sleeved on the lower side of the rotating sleeve 105. Sixteen circumferentially distributed blades 106 are fixedly connected to the rotating sleeve 105, from Figure 6 It can be seen that an annular guide groove 109 is provided on the inner wall of the guide ring 104, and the blade 106 is located in the guide groove 109 on the guide ring 104. The water in the water supply channel 102 can flow into the guide groove 109 through the liquid inlet pipe 103, so as to push the rotating sleeve 105 and the filter cartridge 107 to rotate through the blade 106. The side of the guide ring 104 away from the liquid inlet pipe 103 is connected and fixedly connected with a liquid outlet pipe 108 for water discharge. The liquid outlet pipe 108 passes through the side wall of the dust removal box 1 and extends outward. The air outlet position of the dust removal box 1 is fixedly connected with a blow pipe 804, which is located above the filter cartridge 107. The blow pipe 804 is a pipe commonly used in bag dust collectors in the prior art. The compressed air ejected by the pulse valve is guided to the inside of the filter cartridge 107 to remove dust particles on the filter cartridge 107. The specific blowing principle can refer to the prior art and will not be repeated here.

[0034] When the blades 106 rotate, the air in the dust box 1 is drawn out, so that the exhaust gas enters from the air inlet on the right side of the dust box 1 and then passes through the filter plate 101. The filter plate 101 will filter the large dust particles in the exhaust gas to prevent the large dust particles from hitting the filter cartridge 107, thereby reducing the wear rate of the filter cartridge 107. Then the exhaust gas passes through the filter cartridge 107 and is discharged outward through the air outlet of the dust box 1. The filter cartridge 107 will filter the small dust particles in the exhaust gas, thereby achieving dust removal of the exhaust gas; the water in the water supply channel 102 enters through the liquid inlet pipe 103 When water enters the guide groove 109 of the guide ring 104, the water will push the rotating sleeve 105 to rotate through the blades 106. When the rotating sleeve 105 rotates, it will drive the filter cartridge 107 to rotate synchronously, so that the exhaust gas can fully contact the filtering surface of the filter cartridge 107 during the long-term operation of the equipment, avoiding the situation that only a local area of ​​the filter cartridge 107 is fully in contact with the exhaust gas, making full use of the filtering performance of the filter cartridge 107, and the flow of water in the water supply channel 102 can have a preliminary cooling effect on the exhaust gas and the filter plate 101.

[0035] like Figure 1-Figure 5 As shown, it also includes a shaking mechanism for realizing self-cleaning of the filter plate 101, the shaking mechanism is connected to the filter plate 101, and the shaking mechanism includes a small bracket 2, a top plate 201, a first spring 202, a slide 203 and a protruding rod 204, Figure 2 It can be seen that there are two top plates 201 symmetrically connected in a sliding manner in the dust removal box 1. The top plate 201 is located on the right side of the filter plate 101, and the two top plates 201 slide in the front-to-back direction. Figure 1 and Figure 3 It can be seen that four small brackets 2 are fixedly connected to the outer side walls of the front and rear sides of the dust removal box 1, and the guide rods of the top plate 201 pass through the side walls of the dust removal box 1 and are slidably connected to the adjacent small brackets 2. Figure 5 It can be seen that a No. 1 spring 202 is sleeved on the guide rod of the top plate 201, and a limit ring is provided on the guide rod of the top plate 201 for preventing the No. 1 spring 202 from sliding, and the No. 1 spring 202 is located between the limit ring and the small bracket 2, and seven slideways 203 are evenly spaced at one end of the top plate 201 close to the filter plate 101, and the slideways 203 are inclined. Figure 4 It can be seen that a plurality of protruding rods 204 are fixedly connected at equal distances to one end of the filter plate 101 close to the top plate 201, and each protruding rod 204 is located in a slideway 203. When the two top plates 201 move in opposite directions, the filter plate 101 is driven to move upward through the protruding rods 204. Since the filter plate 101 will shake up and down, when producing this equipment, technicians need to use elastic sealing materials to seal the upper and lower ends of the filter plate 101 to prevent large particles from flowing through the gap between the filter plate 101 and the dust removal box 1.

[0036] like Figure 2-Figure 4As shown, it also includes a water supply mechanism for delivering water to the water supply channel 102, the water supply mechanism is connected to the filter plate 101, the water supply mechanism includes a water tank 3, a pressure pipe 301, a piston rod 302 and a water delivery pipe 303, the lower end of the dust removal box 1 is fixedly connected to the water tank 3, and the end of the liquid outlet pipe 108 away from the guide ring 104 is connected to the water tank 3, and the combination Figure 3 and Figure 4 The vent pipe 303 is connected to the filter housing 101 and the filter housing 102 is connected to the filter housing 101. The vent pipe 303 is connected to the filter housing 101 and the filter housing 102 is connected to the filter housing 101. The vent pipe 303 is connected to the filter housing 101 and the filter housing 102 is connected to the filter housing 101.

[0037] When the two top plates 201 move away from each other, the No. 1 spring 202 will be compressed, and the top plate 201 will drive the filter plate 101 to move upward through the slide 203 and the protruding rod 204, and the filter plate 101 will drive the piston rod 302 to move upward, and the piston rod 302 will suck the water in the water tank 3 into the pressurized pipe 301. When the top plates 201 move relatively, the filter plate 101 will drive the piston rod 302 to reset downward. At this time, the piston rod 302 will push the water in the pressurized pipe 301 to the water supply channel 102 through the water pipe 303, thereby realizing the function of automatic water replenishment, so as to continuously drive the filter cartridge 107 to rotate through the water flow, and shaking the filter plate 101 helps to loosen and fall off large dust particles on the surface and stuck at the edge of the filter hole, thereby maintaining the air permeability and interception efficiency of the filter plate 101.

[0038] like Figure 6 and Figure 7 As shown, it also includes a main push block 304 and an auxiliary push block 305 for facilitating the rotating sleeve 105 to drive the filter cartridge 107 to rotate. Three main push blocks 304 distributed in a circle are fixedly connected to the inner wall of the rotating sleeve 105. The lower end of the main push block 304 is in close contact with the top end of the filter cartridge 107. Three auxiliary push blocks 305 distributed in a circle are fixedly connected to the top end of the filter cartridge 107. The main push block 304 and the auxiliary push block 305 are at the same height.

[0039] Since the main push block 304 and the auxiliary push block 305 are at the same height, the filter cartridge 107 can be pushed to rotate by the main push block 304 and the auxiliary push block 305 when the rotating sleeve 105 rotates.

[0040] like Figure 6As shown, an atomizing nozzle 901 is also included. The rotating sleeve 105 is provided with 16 humidifying holes 9 penetrating the side wall thereof. The atomizing nozzle 901 is fixedly connected to one end of the humidifying hole 9 away from the guide groove 109 .

[0041] Each time the piston rod 302 pushes water into the water supply channel 102, most of the water flow in the guide groove 109 will push the rotating sleeve 105 to rotate through the blades 106, and then be discharged into the water tank 3 through the liquid outlet pipe 108. A small part of the water flow will enter the humidification hole 9 and be sprayed out from the atomizing nozzle 901, thereby further cooling the exhaust gas. In addition, the dry exhaust gas can be humidified by spraying water mist. Appropriate humidification can improve the desulfurization efficiency of the exhaust gas in the wet desulfurization process.

[0042] Embodiment 2: Based on embodiment 1, Figure 2 , Figure 3 and Figure 8 As shown, a cleaning mechanism for cleaning the surface of the filter plate 101 is also included. The cleaning mechanism is located on the right side of the filter plate 101. The cleaning mechanism includes a reciprocating screw 4, a slider 401, a scraper shell 402, a second spring 403, a small support rod 404, a slag pusher plate 405 and a slag cleaning guide rod 407. Figure 2 It can be seen that the dust removal box 1 is rotatably connected to a reciprocating screw 4, a slag cleaning guide rod 407 is fixedly connected to the side of the dust removal box 1 away from the reciprocating screw 4, a slider 401 is threadedly connected to the reciprocating screw 4, and a slider 401 is slidably connected to the slag cleaning guide rod 407. Figure 3 and Figure 8 It can be seen that the two sliders 401 are slidably connected with a scraper shell 402, and the scraper shell 402 is a shell structure that runs through from top to bottom. A No. 2 spring 403 is sleeved on the guide rod slidably connected to the slider 401 and the scraper shell 402, and the No. 2 spring 403 is located on the lower side of the slider 401. A small support rod 404 is fixedly connected to one side of the slider 401 extending into the interior of the scraper shell 402, and a slag pushing plate 405 is fixedly connected to the top of the small support rod 404. The slag pushing plate 405 is in contact with the inner wall of the scraper shell 402, and the slag pushing plate 405 and the top of the scraper shell 402 are both inclined surfaces with the left side higher and the right side lower. When the scraper shell 402 cannot move downward, the slider 401 will drive the slag pushing plate 405 to continue to move downward through the small support rod 404, so as to push out the dust particles on the inner wall of the scraper shell 402.

[0043] like Figure 5 and Figure 8 As shown, it also includes a top block 406 for pushing the top plate 201 to move. Two top blocks 406 are symmetrically fixed to the scraper shell 402. The scraper shell 402 and the top block 406 are located between the two top plates 201. The opposite ends of the two top plates 201 are wavy, so that the top block 406 can drive the two top plates 201 to move back and forth intermittently during the downward movement.

[0044] like Figure 2 and Fig. 9 As shown, it also includes a collecting mechanism for collecting the cleaned dust particles, which is located at the bottom of the dust removal box 1. The collecting mechanism includes a slag collecting box 5, a collecting guide rod 501, a sliding frame 502, a partition plate 503 and a third spring 504. The slag collecting box 5 is arranged below the dust removal box 1. A square through hole connected to the slag collecting box 5 is opened on the lower side of the dust removal box 1. The scraper shell 402 can just enter the through hole. Fig. 9 It can be seen that grooves are provided on the front and rear sides of the square through hole, and a material collecting guide rod 501 is fixed in the grooves. The material collecting guide rod 501 is slidably connected to a sliding frame 502 in the vertical direction. A partition plate 503 is fixed to the two sliding frames 502. The upper end of the partition plate 503 is an inclined surface. The partition plate 503 is located in the square through hole on the lower side of the dust removal box 1, and the partition plate 503 is used to cut off the connection between the slag collection box 5 and the dust removal box 1. A No. 3 spring 504 is sleeved on the material collecting guide rod 501, and the No. 3 spring 504 is located on the lower side of the sliding frame 502.

[0045] When the reciprocating screw 4 rotates, it will drive the scraper shell 402 to move up and down through the slider 401, and the scraper shell 402 will squeeze the top plate 201 through the top block 406, so that the filter plate 101 can shake back and forth; during the downward movement of the scraper shell 402, the dust particles on the right end surface of the filter plate 101 will be scraped, and then the scraper shell 402 begins to enter the square through hole opened at the lower side of the dust removal box 1, and when the scraper shell 402 continues to move downward, it will first press the partition plate 503 downward, and the No. 3 spring 504 will be compressed, so that the slag box 5 and the scraper shell 402 are connected, and the scraper shell 402 and the inner wall of the square through hole fit together, so at this time the dust removal box 1 and the slag box 5 and the scraper shell 402 are not connected, preventing the dust particles in the slag box 5 from drifting into the dust removal box 1 under the suction force, and then the partition plate 503 cannot continue to move downward, and the scraper shell 402 The third spring 504 will push the partition plate 503 to reset upwards. Since the slag pushing plate 405 and the top of the slag scraping shell 402 are inclined surfaces, dust particles can be prevented from accumulating on the top of the slag pushing plate 405 and the top of the slag scraping shell 402 during the upward reset process.

[0046] Embodiment 3: Based on embodiment 2, Figure 1and Figure 2 As shown, it also includes a driving mechanism for driving the reciprocating screw 4 and the impeller 805 to rotate, the driving mechanism includes a servo motor 8, a main transmission rod 801, an auxiliary transmission rod 802 and a gear set 803. The servo motor 8 is fixedly connected to the top of the dust removal box 1, and the main transmission rod 801 and the auxiliary transmission rod 802 are rotatably connected to the top of the dust removal box 1. The main transmission rod 801 and the auxiliary transmission rod 802 are vertical, and the auxiliary transmission rod 802 is fixedly connected to the output shaft of the servo motor 8. The upper end of the reciprocating screw 4 extends upward from the dust removal box 1, and the part of the reciprocating screw 4 extending upward from the dust removal box 1 is not provided with threads. The upper end of the reciprocating screw 4 and the auxiliary transmission rod 802 are connected by the gear set 803, the main transmission rod 801 and the auxiliary transmission rod 802 are connected by another gear set 803, and the end of the main transmission rod 801 away from the auxiliary transmission rod 802 is connected to the impeller 805 by another group of gear sets 803.

[0047] like Figure 6 and Figure 7 As shown, it also includes a safety mechanism for automatically removing the filter cartridge 107, which is installed on the filter cartridge 107. The safety mechanism includes a pull plate 601, a No. 4 spring 602 and a clamping block 603. An annular ventilation groove 6 is provided on the inner wall of the filter cartridge 107. Two symmetrical clamping blocks 603 are radially slidably connected on the side wall of the filter cartridge 107. The top of the clamping block 603 is an inclined surface, and the outer end of the clamping block 603 extends out of the filter cartridge 107. The clamping block 603 slides with the filter cartridge 107. A pull plate 601 is fixedly connected to the guide rod of the dynamic connection, and the pull plate 601 is located in the ventilation groove 6. A No. 4 spring 602 is sleeved on the guide rod to which the clamping block 603 is slidably connected with the filter cartridge 107. When the suction force inside the filter cartridge 107 is large, the clamping block 603 will retract by attracting the pull plate 601. An annular clamping groove 604 is provided on the inner wall of the guide ring 104. The filter cartridge 107 and the guide ring 104 are rotatably connected by clamping the clamping block 603 in the clamping groove 604.

[0048] like Figure 2 As shown, a smoke baffle 7 is also included to prevent smoke from scattering. The smoke baffle 7 is rotatably connected inside the dust removal box 1. When the smoke baffle 7 is rotated to a vertical state, it can fit with the left end surface of the filter plate 101.

[0049] After the servo motor 8 is started, it will drive the reciprocating screw 4 and the impeller 805 to rotate. During the rotation of the impeller 805, the smoke baffle 7 will swing outward and open under the action of suction, so that the exhaust gas can enter the filter cartridge 107. When the filter cartridge 107 is seriously blocked, the internal negative pressure will increase. After the negative pressure increases, it will attract the two pull plates 601 in the ventilation slot 6 to move relative to each other. The pull plate 601 drives the card block 603 to disengage from the card slot 604, so that the filter cartridge 107 automatically falls off. When using this equipment, the technician needs to connect the filter cartridge 107 and the servo motor 8 electrically or by signal. When the filter cartridge 107 falls off, the servo motor 8 can automatically stop, and the impeller 805 will stop rotating. Then the technician will clean the filter cartridge. 107 is replaced to prevent the servo motor 8 from burning out due to long-term load operation when the filter cartridge 107 is seriously clogged. After the impeller 805 stops, the smoke baffle 7 will rotate to a vertical state under the action of gravity to prevent the smoke from continuing to drift to the left space inside the dust removal box 1; when replacing a new filter cartridge 107, align the filter cartridge 107 with the rotating sleeve 105 and push it upward. Since the top of the block 603 will be inclined, the block 603 will first shrink into the filter cartridge 107 under the squeezing of the guide ring 104, and when the block 603 moves to the height of the clamping groove 604, it will pop out under the action of the No. 4 spring 602, and the block 603 moves to the clamping groove 604 to realize the rapid installation of the filter cartridge 107.

[0050] A dust removal method for a dust removal device in a thermal power plant, specifically comprising the following steps:

[0051] In the first step, the filter plate 101 is used to filter large dust particles in the exhaust gas;

[0052] In the second step, the filter cartridge 107 is used to filter small dust particles in the exhaust gas;

[0053] The third step is to control the rotation of the filter cartridge 107 to fully utilize its filtering performance;

[0054] The fourth step is to discharge the filtered exhaust gas.

[0055] It should be understood that the above description is only for exemplary purposes and is not meant to limit the present invention. Those skilled in the art will appreciate that variations of the present invention will be included within the scope of the claims herein.

Claims

1. A dust removal device for a thermal power plant, comprising a dust removal box (1), characterized in that: The dust removal box (1) also comprises a filter plate (101), a liquid inlet pipe (103), a guide ring (104), a rotating sleeve (105), blades (106), a filter cartridge (107) and a liquid outlet pipe (108). The dust removal box (1) is provided with a filter plate (101) for filtering large dust particles. The filter plate (101) is provided with a water supply channel (102). The dust removal box (1) is fixedly connected with a liquid inlet pipe (103). The liquid inlet pipe (103) and the water supply channel (102) are in communication. The other end of the liquid inlet pipe (103) is fixedly connected with a guide ring (104). The guide ring (104) is rotatably connected with a filter for filtering. The dust removal box (1) is provided with a filter cartridge (107) for filtering small dust particles. The air outlet of the dust removal box (1) is rotatably connected to a rotating sleeve (105). The rotating sleeve (105) is fixedly connected to a plurality of circumferentially distributed blades (106). The blades (106) are located in guide grooves (109) on a guide ring (104). Water in a water supply channel (102) can flow into the guide grooves (109) to drive the rotating sleeve (105) to rotate through the blades (106). When the rotating sleeve (105) rotates, it drives the filter cartridge (107) to rotate synchronously. The guide ring (104) is connected to a liquid outlet pipe (108) for discharging water.

2. A dust removal device for a thermal power plant according to claim 1, characterized in that: The invention also comprises a shaking mechanism for realizing self-cleaning of the filter plate (101), the shaking mechanism comprising a top plate (201), the top plate (201) being slidably connected in the dust removal box (1), a small bracket (2) for guiding the top plate (201) being fixedly connected to the dust removal box (1), and a spring (202) for pushing the top plate (201) to return to its original position is sleeved on the top plate (201), a slideway (203) is provided on the top plate (201), a convex rod (204) is fixedly connected to the filter plate (101), the convex rod (204) is located in the slideway (203), and when the top plate (201) moves, the convex rod (204) drives the filter plate (101) to shake.

3. A dust removal device for a thermal power plant according to claim 2, characterized in that: The invention also comprises a water supply mechanism for delivering water to the water supply channel (102), the water supply mechanism comprising a water tank (3), the water tank (3) being fixedly connected to the dust removal box (1), a pressurizing pipe (301) and a water delivery pipe (303) being fixedly connected in the water tank (3), a piston rod (302) being slidably connected to the pressurizing pipe (301), the piston rod (302) passing through the dust removal box (1) and being fixedly connected to the filter plate (101), an opening for absorbing water being provided in the pressurizing pipe (301), one end of the pressurizing pipe (301) being connected to the water delivery pipe (303), a one-way valve being installed in both the pressurizing pipe (301) and the water delivery pipe (303), so that the piston rod (302) can push the water in the water tank (3) into the water delivery pipe (303) when performing a pulling and pulling movement, and the other end of the water delivery pipe (303) being connected to the water supply channel (102).

4. A dust removal device for a thermal power plant according to claim 1, characterized in that: It also includes a main push block (304) and an auxiliary push block (305) for facilitating the rotating sleeve (105) to drive the filter cartridge (107) to rotate. The main push block (304) is fixedly connected to the rotating sleeve (105), and the auxiliary push block (305) is fixedly connected to the filter cartridge (107). The main push block (304) and the auxiliary push block (305) are at the same height.

5. A dust removal device for a thermal power plant according to claim 2, characterized in that: The cleaning mechanism is also provided for cleaning the surface of the filter plate (101), the cleaning mechanism comprising a reciprocating screw (4), the reciprocating screw (4) being rotatably connected in the dust removal box (1), the reciprocating screw (4) being threadedly connected to a slider (401), a slag cleaning guide rod (407) for guiding the slider (401) being fixedly connected to the dust removal box (1), a slag scraping shell (402) being slidably connected to the slider (401), a No. 2 spring (403) being sleeved on the guide rod slidably connected between the slag scraping shell (402) and the slider (401), a small support rod (404) being fixedly connected to the slider (401), a slag pushing plate (405) being fixedly connected to the small support rod (404), and when the slider (401) moves downward relative to the slag scraping shell (402), the slag pushing plate (405) will push out dust particles on the inner wall of the slag scraping shell (402).

6. A dust removal device for a thermal power plant according to claim 5, characterized in that: It also includes a top block (406) for pushing the top plate (201) to move. The top block (406) is fixedly connected to the scraper shell (402). One end of the top plate (201) facing the top block (406) is wavy. The top block (406) and the top plate (201) are pressed and matched.

7. A dust removal device for a thermal power plant according to claim 5, characterized in that: The invention also comprises a material collecting mechanism for collecting the cleaned dust particles, the material collecting mechanism comprising a slag collecting box (5), the slag collecting box (5) being arranged below the dust removal box (1), the dust removal box (1) being provided with a through hole connected to the slag collecting box (5), the through hole being slidably connected to a sliding frame (502) via a material collecting guide rod (501), a partition plate (503) for isolating the connection between the slag collecting box (5) and the dust removal box (1) being fixedly connected to the sliding frame (502), and a No. 3 spring (504) for pushing the partition plate (503) to return upward is sleeved on the material collecting guide rod (501).

8. A dust removal device for a thermal power plant according to claim 1, characterized in that: It also includes a safety mechanism for automatically removing the filter cartridge (107), the safety mechanism including a clamping block (603), the filter cartridge (107) being slidably connected with the clamping block (603), a pull plate (601) being fixedly connected to a guide rod to which the clamping block (603) and the filter cartridge (107) are slidably connected, the pull plate (601) being located in a ventilation groove (6) provided on the inner wall of the filter cartridge (107), when the suction force inside the filter cartridge (107) is large, the clamping block (603) will be retracted by attracting the pull plate (601), an annular clamping groove (604) for clamping the clamping block (603) is provided on the inner wall of the guide ring (104), so as to realize the rotational connection between the filter cartridge (107) and the guide ring (104), and a No. 4 spring (602) is sleeved on the guide rod to which the clamping block (603) and the filter cartridge (107) are slidably connected.

9. A dust removal device for a thermal power plant according to claim 1, characterized in that: It also includes a smoke baffle (7) for preventing smoke from drifting, and the smoke baffle (7) is rotatably connected in the dust removal box (1).

10. A dust removal method for a dust removal device in a thermal power plant according to any one of claims 1 to 9, characterized in that: The Method The following steps are involved: In the first step, a filter plate (101) is used to filter large dust particles in the exhaust gas; In the second step, a filter cartridge (107) is used to filter small dust particles in the exhaust gas; The third step is to control the rotation of the filter cartridge (107) to fully utilize its filtering performance; The fourth step is to discharge the filtered exhaust gas.

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