CN110624348B - Environment-friendly circulating dust removal device for coal-fired power plant and dust removal process thereof - Google Patents
Environment-friendly circulating dust removal device for coal-fired power plant and dust removal process thereof Download PDFInfo
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- CN110624348B CN110624348B CN201910798021.5A CN201910798021A CN110624348B CN 110624348 B CN110624348 B CN 110624348B CN 201910798021 A CN201910798021 A CN 201910798021A CN 110624348 B CN110624348 B CN 110624348B
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- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
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- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
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- B01D53/34—Chemical or biological purification of waste gases
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- B01D53/48—Sulfur compounds
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Abstract
The invention discloses an environment-friendly circulating dust removal device for a coal-fired power plant, which comprises a device shell, a flue gas filtering component, a gas washing component and a desulfurization component, wherein the flue gas filtering component is arranged on the device shell; the device comprises a device shell, a flue gas filtering component, a filter plate, a cleaning component, a desulfurizing component and a desulfurizing component, wherein the device shell is internally provided with an induced draft fan and an exhaust fan, the device shell is provided with an air inlet, an air outlet and a water outlet, the flue gas filtering component comprises a filter box, the filter plate and the cleaning component, the filter box is connected with the air inlet and the exhaust fan, the filter plate and the cleaning component are arranged in the filter box, the cleaning component comprises a clean water tank, a sprinkler head and a gas distribution plate, the clean water tank is arranged on the device shell, the sprinkler head and the gas distribution plate are arranged in the device shell, the desulfurizing component comprises an adsorption; the invention has reasonable structural design, high smoke dust purification efficiency and market popularization value.
Description
Technical Field
The invention relates to the technical field of power plants, in particular to an environment-friendly circulating dust removal device for a coal-fired power plant and a dust removal process thereof.
Background
At present, 90% of electric energy in China comes from thermal power generation, a large amount of coal is required to be combusted in thermal power generation and industrial production, a large amount of dust particles are generated in coal combustion, if the impurities are not treated, the environment and the health of operators are seriously threatened, and coal-fired flue gas pollutants generated by coal-fired power plants and industrial boilers become main sources of air pollution. With increasing attention paid to emission of composite coal-fired flue gas pollutants such as fine particulate matters, heavy metal mercury and volatile organic compounds of fire coal-fired power plants and industrial boilers, treatment of the composite pollutants also becomes a focus of wide attention of the international society, and developed countries have strictly limited emission of PM2.5 fine particulate matter mercury.
When the existing dust removal device for the coal-fired power plant is used, the coal dust particles are not thoroughly filtered, so that the device is easy to block, and the subsequent treatment is influenced; lack the subassembly of clearing up in the device, the device needs carry out artifical clearance to the device after operation a period, has influenced dust collector's work efficiency greatly.
Disclosure of Invention
Aiming at the technical problems, the invention provides the environment-friendly circulating dust removal device for the coal-fired power plant and the dust removal process thereof, wherein the environment-friendly circulating dust removal device is reasonable in structural design and high in dust removal efficiency.
The technical scheme of the invention is as follows: an environment-friendly circulating dust removal device for a coal-fired power plant comprises a device shell, a flue gas filtering component, a gas washing component and a desulfurization component; a desulfurization cavity, a cleaning cavity and a filter cavity are arranged in the device shell from top to bottom, a gas passage is arranged between the desulfurization cavity and the cleaning cavity, an induced draft fan is arranged in the desulfurization cavity, a gas inlet of the induced draft fan is connected with the gas passage, a gas outlet of the induced draft fan is communicated with the desulfurization cavity, an exhaust fan is arranged in the filter cavity, an air inlet, an air outlet and a water outlet are arranged on the device shell, an air outlet pipe of the exhaust fan is communicated with the cleaning cavity, the air inlet is communicated with the filter cavity, the air outlet is communicated with the desulfurization cavity, and the water outlet is communicated; the smoke filtering component comprises a filtering box, a filtering plate and a cleaning component, the filtering box is arranged in the filtering cavity, the lower end of the filtering box is connected with the air inlet, the upper end of the filtering box is connected with the air inlet pipe of the exhaust fan, the filtering plate is horizontally arranged in the filtering box, the cleaning component is arranged in the filtering box and is positioned at the lower end of the filtering plate, and the cleaning component is used for washing dust particles attached to the filtering plate; the gas washing component comprises a clean water tank, a sprinkler head and a gas distribution plate, the clean water tank is arranged on the side wall of the device shell, the sprinkler head is arranged at the top end of the inner part of the cleaning cavity, the sprinkler head is communicated with the clean water tank, and the gas distribution plate is fixedly arranged in the cleaning cavity and is positioned at the lower end of the sprinkler head; the desulfurization subassembly includes the adsorption plate, the desulfurizer storage tank, the desulfurizer sprays the board, the adsorption plate sets up at the desulfurization intracavity portion, and be located the gas channel right side, the desulfurizer sprays the board setting in the desulfurization intracavity portion, and be located the adsorption plate right side, be provided with the baffle between desulfurizer sprays board and the adsorption plate, the clearance has between baffle and the desulfurization chamber, the desulfurizer storage tank sets up on the lateral wall of device shell, the desulfurizer storage tank sprays the version in the desulfurizer and connects, draught fan and air exhauster are supplied power by external power source.
Furthermore, the top end of the device shell is movably clamped with a top cover, a handle is arranged on the top cover, and the internal components of the device shell are convenient to clean and maintain by arranging the top cover.
Further, the filter is provided with two, and two filters are all horizontal to be set up, and the filtration pore diameter of the filter that is located the inside upper end of filter chamber is less than the filtration pore diameter of the filter that is located the inside lower extreme of filter chamber, and through setting up two filters, furthest filters the large granule smoke and dust in the gas of discharging fume that coal fired power plant, avoids the large granule smoke and dust in the flue gas to cause the jam to the device, influences subsequent processing effect.
Furthermore, the cleaning assembly comprises a cleaning frame and a pushing motor, sliding blocks are arranged at two ends of the cleaning frame, the cleaning frame is movably clamped on the inner wall of the filter box through the sliding blocks, cleaning bristles are arranged at the upper end of the cleaning frame, a dust collecting box is arranged at the lower end of the cleaning frame, the pushing motor is fixedly arranged on the outer wall of the filter box, a threaded rod is arranged on an output shaft of the pushing motor, and the threaded rod penetrates through the filter box and then is in threaded connection with the sliding blocks; when the dust collecting box is used, the threaded rod is driven to rotate by the pushing motor, so that the cleaning frame moves together with the cleaning bristles to wash the attached smoke dust at the bottom of the filter plate, and the washed smoke dust particles fall into the dust collecting box, so that the dust collecting box is convenient to clean.
Further, the gas distribution plate is the back taper structure, be provided with 3 gas distribution grooves from inside to outside on the gas distribution plate, the inboard of 3 gas distribution grooves all is provided with the water catch bowl, the water catch bowl switches on with the gas distribution groove, be provided with the hole of permeating water on the water catch bowl, through setting up 3 gas distribution grooves, do benefit to smoke and dust evenly distributed in wasing the chamber, make to wash more thoroughly, the inboard of every gas distribution groove all is provided with the water catch bowl, avoid wasing the gas distribution groove that water inflow lower department and influence the gas distribution effect.
Further, the desulfurizer spraying plate is including spraying the plate frame, spray rod and rotation motor, it is rectangular frame to spray the plate frame, spray rod is provided with 4, 4 spray rod are along vertical direction evenly distributed on spraying the plate frame, all be provided with the shower nozzle on 4 spray rods, the one end and the spray plate frame of spray rod rotate to be connected, spray rod's the other end runs through and sprays the plate frame and is provided with the swing pinion, swing pinion meshes on two adjacent spray rods mutually, it sets up on spraying the plate frame to rotate the motor is fixed, be provided with the link gear on the output shaft of rotation motor, the link gear meshes with arbitrary swing pinion mutually, evenly spray the desulfurizer in to the flue gas through spray rod, flue gas desulfurization effect is improved.
Furthermore, the spray heads on the two adjacent spray rods are arranged in a staggered manner, and the staggered spray heads are beneficial to full contact of a desulfurizer and flue gas, so that the flue gas desulfurization effect is improved.
The process for environment-friendly dedusting by using the device comprises the following steps:
the method comprises the following steps: connecting the device with an external power supply, connecting the air inlet with production equipment of a coal-fired power plant, and connecting the air outlet with smoke exhaust equipment of the coal-fired power plant;
step two: flue gas generated by a coal-fired power plant enters the lower part of the filter box under the action of the exhaust fan, enters the cleaning cavity under the action of the exhaust fan after entering the filter box and sequentially passing through the two filter plates, the motor is pushed to drive the threaded rod to rotate, the sliding block is pushed to move, then cleaning bristles on the cleaning frame wash the bottoms of the filter plates, and the washed smoke particles fall into the dust collecting box to be collected;
step three: after entering the cleaning cavity, the flue gas discharged by the air outlet pipe of the exhaust fan is uniformly distributed in the cleaning cavity through the gas distribution grooves on the gas distribution plate, and then is washed by clean water sprayed by the spray head, and the cleaned flue gas enters the desulfurization cavity through the gas passage under the action of the induced draft fan; the cleaning wastewater is discharged from the device through the water outlet;
step four: the flue gas that gets into the desulfurization chamber loops through adsorption plate, baffle and desulfurizer spray plate under the effect of draught fan and then discharges from the air exit, and when the flue gas got into the desulfurizer spray plate, the rotation motor drove each spray bar rotatory, carries out desulfurization treatment through shower nozzle spun desulfurizer to the flue gas.
Compared with the prior art, the invention has the beneficial effects that: the invention has reasonable structural design and simple operation, and in the running process of the device, the filter plate is cleaned by the cleaning assembly, and meanwhile, the cleaned smoke particles are collected and treated, thereby greatly improving the filtering effect of the smoke; by arranging the gas distribution plate, the diffusion of the smoke dust is more uniform, the smoke dust is more fully contacted with the cleaning liquid, and the smoke dust cleaning effect is improved; heavy metal pollutants such as mercury in coal-fired smoke and dust are adsorbed through setting up magnetic activity charcoal adsorbent and are handled, place the smoke and dust and discharge and cause heavy metal pollution, through setting up pivoted spray arm for sulphide in the smoke and dust is by the abundant desorption in calcium oxide desulfurization street.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the connection of the filter plate to the cleaning assembly of the present invention;
FIG. 3 is a schematic view of the connection of the cleaning assembly of the present invention to a filter box;
FIG. 4 is a top view of the gas distribution plate of the present invention;
FIG. 5 is a longitudinal cross-sectional view of the gas distribution plate of the present invention;
FIG. 6 is a schematic structural view of a desulfurizing agent sprinkling plate of the present invention;
FIG. 7 is a left side view of a desulfurizing agent sprinkling plate of the present invention;
wherein, 1-device shell, 10-desulfurization cavity, 11-cleaning cavity, 110-gas passage, 12-filter cavity, 13-induced draft fan, 14-induced draft fan, 140-gas outlet pipe, 141-gas inlet pipe, 15-air inlet, 16-air outlet, 17-water outlet, 18-top cover, 180-handle, 2-smoke filter component, 20-filter box, 21-filter plate, 22-cleaning component, 220-cleaning frame, 2200-slide block, 221-pushing motor, 222-cleaning brush hair, 223-dust collecting box, 224-threaded rod, 3-gas cleaning component, 30-clean water tank, 31-spray head, 32-gas distribution plate, 320-gas distribution groove, 321-water collecting groove, 3210-water permeable hole, water outlet, etc, 4-desulfurization component, 40-adsorption plate, 41-desulfurizer storage tank, 42-desulfurizer spray plate, 420-spray plate frame, 421-spray rod, 4210-rotary gear, 422-rotating motor, 4220 linkage gear and 43-clapboard.
Detailed Description
Example (b): as shown in fig. 1, the environment-friendly circulating dust removal device for the coal-fired power plant comprises a device shell 1, a flue gas filtering component 2, a gas washing component 3 and a desulfurization component 4; a desulfurization cavity 10, a cleaning cavity 11 and a filtering cavity 12 are arranged in the shell 1 from top to bottom, a gas passing channel 110 is arranged between the desulfurization cavity 10 and the cleaning cavity 11, an induced draft fan 13 is arranged in the desulfurization cavity 10, a gas inlet of the induced draft fan 13 is connected with the induced draft fan 13, a gas outlet of the induced draft fan 13 is communicated with the desulfurization cavity 10, an exhaust fan 14 is arranged in the filtering cavity 12, an air inlet 15, an air outlet 16 and a water outlet 17 are arranged on the shell 1 of the device, an air outlet pipe 140 of the exhaust fan 14 is communicated with the cleaning cavity 11, the air inlet 15 is communicated with the filtering cavity 12, the air outlet 16 is communicated with the desulfurization cavity 10, and the; the top end of the device shell 1 is movably clamped with a top cover 18, a handle 180 is arranged on the top cover 18, and the top cover 18 is arranged, so that the internal components of the device shell 1 can be cleaned and maintained conveniently;
as shown in fig. 1, 2 and 3, the flue gas filtering component 2 comprises a filtering box 20, a filtering plate 21 and a cleaning component 22, the filtering box 20 is arranged inside the filtering chamber 12, the lower end of the filtering box 20 is connected with the air inlet 15, the upper end of the filtering box 20 is connected with the air inlet pipe 141 of the exhaust fan 14, the filtering plate 21 is horizontally arranged inside the filtering box 20, the cleaning component 22 is arranged inside the filtering box 20 and is positioned at the lower end of the filtering plate 21, and the cleaning component 22 is used for washing the attached soot particles on the filtering plate 21; two filter plates 21 are arranged, the two filter plates 21 are horizontally arranged, the aperture of the filter hole of the filter plate 21 at the upper end inside the filter chamber 12 is smaller than that of the filter plate 21 at the lower end inside the filter chamber 12, and by arranging the two filter plates 21, large-particle smoke in smoke discharged by a coal-fired power plant is filtered to the maximum extent, so that the large-particle smoke in the smoke is prevented from blocking the device and affecting the subsequent treatment effect; the cleaning assembly 22 comprises a cleaning frame 220 and a pushing motor 221, sliding blocks 2200 are arranged at two ends of the cleaning frame 220, the cleaning frame 220 is movably clamped on the inner wall of the filter box 20 through the sliding blocks 2200, cleaning bristles 222 are arranged at the upper end of the cleaning frame 220, a dust collecting box 223 is arranged at the lower end of the cleaning frame 220, the pushing motor 221 is fixedly arranged on the outer wall of the filter box 20, a threaded rod 224 is arranged on an output shaft of the pushing motor 221, and the threaded rod 224 penetrates through the filter box 20 and then is in threaded connection with the sliding blocks 2200; when the dust collector is used, the threaded rod 224 is driven to rotate by the pushing motor 221, so that the cleaning frame 220 and the cleaning bristles 222 move together, the dust attached to the bottom of the filter plate 21 is cleaned, and the cleaned dust particles fall into the dust collecting box 223, so that the cleaning is facilitated;
as shown in fig. 1, 4 and 5, the scrubbing assembly 3 comprises a clean water tank 30, a sprinkler 31 and an air distribution plate 32, the clean water tank 30 is arranged on the side wall of the device shell 1, the sprinkler 31 is arranged at the top end inside the cleaning cavity 11, the sprinkler 31 is communicated with the clean water tank 30, and the air distribution plate 32 is fixedly arranged inside the cleaning cavity 11 and is positioned at the lower end of the sprinkler 31; the gas distribution plate 32 is of an inverted cone structure, 3 gas distribution grooves 320 are formed in the gas distribution plate 32 from inside to outside, water collecting grooves 321 are formed in the inner sides of the 3 gas distribution grooves 320, the water collecting grooves 321 are communicated with the gas distribution grooves 320, water permeable holes 3210 are formed in the water collecting grooves 321, smoke and dust are favorably and uniformly distributed in the cleaning cavity 11 through the arrangement of the 3 gas distribution grooves 320, cleaning is more thorough, the water collecting grooves 321 are formed in the inner sides of all the gas distribution grooves, and the phenomenon that cleaning water flows into the gas distribution grooves 320 at the lower positions to influence the gas distribution effect is avoided;
as shown in fig. 1, 6 and 7, the desulfurization module 4 includes an adsorption plate 40, a desulfurizer storage tank 41 and a desulfurizer spray plate 42, the adsorption plate 40 is disposed inside the desulfurization chamber 10 and located on the right side of the gas passage 110, a magnetic activated carbon adsorbent is disposed on the adsorption plate 40, the desulfurizer spray plate 42 is disposed inside the desulfurization chamber 10 and located on the right side of the adsorption plate 40, a partition plate 43 is disposed between the desulfurizer spray plate 42 and the adsorption plate 40, a gap is formed between the partition plate 43 and the desulfurization chamber 10, the desulfurizer storage tank 41 is disposed on the sidewall of the device housing 1, the desulfurizer storage tank 41 is connected with the desulfurizer spray plate 42, a calcium oxide solution desulfurizer is stored inside the desulfurizer storage tank 41, the desulfurizer spray plate 42 includes a spray plate frame 420, spray rods 421 and a rotating motor 422, the spray plate frame 420 is a rectangular frame, the spray rods 421 are 4, 4 spray rods 421 are uniformly distributed on the spray plate frame 420 along the vertical direction, all the 4 spraying rods 421 are provided with spray heads, one end of each spraying rod 421 is rotatably connected with the spraying plate frame 420, the other end of each spraying rod 421 penetrates through the spraying plate frame 420 and is provided with a rotary gear 4210, the rotary gears 4210 on two adjacent spraying rods 421 are meshed with each other, the rotary motor 422 is fixedly arranged on the spraying plate frame 420, an output shaft of the rotary motor 422 is provided with a linkage gear 4220, the linkage gear 4220 is meshed with any one rotary gear 4210, a desulfurizer is uniformly sprayed into flue gas through the spraying rods, the flue gas desulfurization effect is improved, the spray heads on two adjacent spraying rods 421 are arranged in a staggered mode, the staggered spray heads are beneficial to full contact of the desulfurizer and the flue gas, and the flue gas desulfurization effect is improved; the pushing motor 221, the rotating motor 422, the induced draft fan 13 and the induced draft fan 14 are all powered by an external power supply.
The process for environment-friendly dedusting by using the device comprises the following steps:
the method comprises the following steps: connecting the device with an external power supply, connecting the air inlet 15 with production equipment of a coal-fired power plant, and connecting the air outlet 16 with smoke discharging equipment of the coal-fired power plant;
step two: flue gas generated by a coal-fired power plant enters the lower part of the filter box 20 under the action of the exhaust fan 14, enters the filter box 20 and then sequentially passes through the two filter plates 21, enters the cleaning cavity 11 under the action of the exhaust fan 14, the motor 221 is pushed to drive the threaded rod 224 to rotate, the sliding block 2200 is pushed to move, then the cleaning bristles 222 on the cleaning frame 220 brush the bottoms of the filter plates 21, and the washed smoke particles fall into the dust collecting box 223 to be collected;
step three: after entering the cleaning cavity 11, the flue gas discharged through the gas outlet pipe 140 of the exhaust fan 14 is uniformly distributed in the cleaning cavity 11 through the gas distribution grooves 320 on the gas distribution plate 32, and then is washed by clean water sprayed by the spray head 31, and the cleaned flue gas enters the desulfurization cavity 10 through the gas passing channel 110 under the action of the induced draft fan 13; the cleaning wastewater is discharged out of the device through the water outlet 17;
step four: the flue gas that gets into desulfurization chamber 10 loops through adsorption plate 40, baffle 43 and desulfurizer spray plate 42 under the effect of draught fan 13 after discharging from air exit 16, and when the flue gas got into desulfurizer spray plate 42, rotation motor 422 drove each spray bar 421 rotatory, carries out desulfurization treatment through the desulfurizer of shower nozzle spun to the flue gas.
Application example:
randomly selecting 6 coal-fired power plants in a certain province in the north of China, grouping the 6 coal-fired power plants pairwise at random, and respectively marking the groups as an experimental group, a control group and a blank group; the experiment group adopts the environment-friendly dust removal device to treat the smoke dust of the coal-fired power plant, the comparison group adopts the electric dust removal device in the prior art to treat the smoke dust, and the blank group is not suitable for any device to treat the smoke dust and directly discharges the smoke dust; and respectively collecting the smoke indexes of the treated smoke.
Through detection, the emission amount of smoke dust before the treatment of the experimental group is 3900mg/Nm3The discharge amount of smoke dust after treatment is 923mg/Nm3The dust removal rate reaches 76.3 percent, and the sulfide content in the smoke dust before treatment is 429mg/Nm3The sulfide content in the treated smoke dust is 56mg/Nm3The desulfurization rate reaches 86.9 percent;
the smoke emission before the control group treatment was 3850mg/Nm3The discharge amount of the treated smoke dust is 1800mg/Nm3The dust removal rate reaches 53.2 percent, and the sulfide content in the smoke dust before treatment is 502mg/Nm3The sulfide content in the treated smoke dust is 238mg/Nm3The desulfurization rate reaches 52.6 percent;
the emission amount of smoke dust before blank group treatment is 4020mg/Nm3The discharge amount of the treated smoke dust is 3150mg/Nm3The dust removal rate is only 21.6 percent, and the sulfide content in the smoke dust before treatment is 398mg/Nm3The sulfide content in the treated smoke dust is 302mg/Nm3The desulfurization rate was only 24.1%.
In conclusion, the environment-friendly dust removal device provided by the invention can be used for treating the smoke dust of the coal-fired power plant, so that the concentration of the smoke dust and the concentration of sulfide in the smoke dust can be greatly reduced, and the smoke dust of the coal-fired power plant can reach the standard and be discharged.
Claims (5)
1. An environment-friendly circulating dust removal device for a coal-fired power plant is characterized by comprising a device shell (1), a flue gas filtering component (2), a gas washing component (3) and a desulfurization component (4); the device shell (1) is internally provided with a desulfurization cavity (10), a cleaning cavity (11) and a filtering cavity (12) from top to bottom, a gas passage (110) is arranged between the desulfurization cavity (10) and the cleaning cavity (11), a draught fan (13) is arranged in the desulfurization cavity (10), the air inlet of the draught fan (13) is connected with the overflowing channel, the air outlet of the draught fan (13) is communicated with the desulfurization cavity (10), an exhaust fan (14) is arranged in the filter cavity (12), an air inlet (15), an air outlet (16) and a water outlet (17) are arranged on the device shell (1), an air outlet pipe (140) of the exhaust fan (14) is communicated with the cleaning cavity (11), the air inlet (15) is communicated with the filter cavity (12), the air outlet (16) is communicated with the desulfurization cavity (10), and the water outlet (17) is communicated with the cleaning cavity (11); the flue gas filtering component (2) comprises a filtering box (20), a filtering plate (21) and a cleaning component (22), the filtering box (20) is arranged inside the filtering cavity (12), the lower end of the filtering box (20) is connected with the air inlet (15), the upper end of the filtering box (20) is connected with an air inlet pipe (141) of the exhaust fan (14), the filtering plate (21) is horizontally arranged inside the filtering box (20), the cleaning component (22) is arranged inside the filtering box (20) and is positioned at the lower end of the filtering plate (21), and the cleaning component (22) is used for washing attached smoke and dust particles on the filtering plate (21); the washing component (3) comprises a clean water tank (30), a spraying head (31) and an air distribution plate (32), the clean water tank (30) is arranged on the side wall of the device shell (1), the spraying head (31) is arranged at the top end inside the washing cavity (11), the spraying head (31) is communicated with the clean water tank (30), and the air distribution plate (32) is fixedly arranged inside the washing cavity (11) and is positioned at the lower end of the spraying head (31); the desulfurization component (4) comprises an adsorption plate (40), a desulfurizer storage tank (41) and a desulfurizer spray plate (42), wherein the adsorption plate (40) is arranged inside a desulfurization cavity (10) and is positioned on the right side of a gas passage (110), the desulfurizer spray plate (42) is arranged inside the desulfurization cavity (10) and is positioned on the right side of the adsorption plate (40), a partition plate (43) is arranged between the desulfurizer spray plate (42) and the adsorption plate (40), a gap is formed between the partition plate (43) and the desulfurization cavity (10), the desulfurizer storage tank (41) is arranged on the side wall of the device shell (1), the desulfurizer storage tank (41) is connected with the desulfurizer spray plate (42), and an induced draft fan (13) and an exhaust fan (14) are powered by an external power supply;
the cleaning assembly (22) comprises a cleaning frame (220) and a pushing motor (221), sliding blocks (2200) are arranged at two ends of the cleaning frame (220), the cleaning frame (220) is movably clamped on the inner wall of the filter box (20) through the sliding blocks (2200), cleaning bristles (222) are arranged at the upper end of the cleaning frame (220), a dust collecting box (223) is arranged at the lower end of the cleaning frame (220), the pushing motor (221) is fixedly arranged on the outer wall of the filter box (20), a threaded rod (224) is arranged on an output shaft of the pushing motor (221), and the threaded rod (224) penetrates through the filter box (20) and then is in threaded connection with the sliding blocks (2200);
the desulfurizer spray plate (42) comprises a spray plate frame (420), a spray rod (421) and a rotating motor (422), the spraying plate frame (420) is a rectangular frame, 3-6 spraying rods (421) are arranged, the 3-6 spraying rods (421) are uniformly distributed on the spraying plate frame (420) along the vertical direction, spray heads are arranged on the 3-6 spraying rods (421), one end of each spraying rod (421) is rotatably connected with the spraying plate frame (420), the other end of each spraying rod (421) penetrates through the spraying plate frame (420) and is provided with a rotating gear (4210), the rotating gears (4210) on two adjacent spraying rods (421) are meshed with each other, the rotating motor (422) is fixedly arranged on the spraying plate frame (420), an output shaft of the rotating motor (422) is provided with a linkage gear (4220), the linkage gear (4220) is meshed with any one rotary gear (4210);
the gas distribution plate (32) is an inverted cone structure, 3 gas distribution grooves (320) are formed in the gas distribution plate (32) from inside to outside, water collecting grooves (321) are formed in the inner sides of the 3 gas distribution grooves (320), the water collecting grooves (321) are communicated with the gas distribution grooves (320), and water permeable holes (3210) are formed in the water collecting grooves (321).
2. The environment-friendly circulating dust removal device for the coal-fired power plant as recited in claim 1, wherein a top cover (18) is movably clamped at the top end of the device shell (1), and a handle (180) is arranged on the top cover (18).
3. The environmental-friendly circulating dust removal device for coal-fired power plants according to claim 1, wherein the number of the filter plates (21) is two, and the two filter plates (21) are horizontally arranged, and the aperture of the filter holes of the filter plate (21) at the upper end inside the filter chamber (12) is smaller than that of the filter plate (21) at the lower end inside the filter chamber (12).
4. The environmental protection circulation dust removing device of coal-fired power plant as claimed in claim 1, wherein the spray heads of two adjacent spray bars (421) are arranged alternately.
5. The process for environmental dust removal by using the device of any one of claims 1 to 4, which is characterized by comprising the following steps:
the method comprises the following steps: the device is connected with an external power supply, an air inlet (15) is connected with production equipment of a coal-fired power plant, and an air outlet (16) is connected with smoke discharging equipment of the coal-fired power plant;
step two: flue gas generated by a coal-fired power plant enters the lower part of a filter box (20) under the action of an exhaust fan (14), the flue gas enters the filter box (20) and then sequentially passes through two filter plates (21), then enters a cleaning cavity (11) under the action of the exhaust fan (14), a motor (221) is pushed to drive a threaded rod (224) to rotate, a sliding block (2200) is pushed to move, so that cleaning bristles (222) on a cleaning frame (220) brush the bottoms of the filter plates (21), and the washed smoke particles fall into a dust collection box (223) to be collected;
step three: after entering the cleaning cavity (11), the flue gas discharged by the gas outlet pipe (140) of the exhaust fan (14) is uniformly distributed in the cleaning cavity (11) through the gas distribution grooves (320) on the gas distribution plate (32), and then is washed by clean water sprayed by the spray heads (31), and the cleaned flue gas enters the desulfurization cavity (10) through the gas passing channel (110) under the action of the induced draft fan (13); the cleaning wastewater is discharged out of the device through a water outlet (17);
step four: the flue gas that gets into desulfurization chamber (10) loops through adsorption plate (40), baffle (43) and desulfurizer spray plate (42) under the effect of draught fan (13) and then discharges from air exit (16), and when the flue gas got into desulfurizer spray plate (42), rotation motor (422) drove each spray bar (421) rotatory, carries out desulfurization treatment through the desulfurizer of shower nozzle spun to the flue gas.
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