CN109012114B - Method for purifying coal-fired tail gas of power plant - Google Patents
Method for purifying coal-fired tail gas of power plant Download PDFInfo
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- CN109012114B CN109012114B CN201810872344.XA CN201810872344A CN109012114B CN 109012114 B CN109012114 B CN 109012114B CN 201810872344 A CN201810872344 A CN 201810872344A CN 109012114 B CN109012114 B CN 109012114B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
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Abstract
The invention belongs to the field of coal-fired tail gas treatment, and particularly relates to a method for purifying coal-fired tail gas of a power plant, wherein a purifying device used in the method comprises a gas inlet pipe, a box body and a gas outlet pipe, wherein the gas inlet pipe is arranged on one side of the bottom of the box body; the top of the box body is provided with an air outlet pipe; an output shaft of the motor is connected with one end of the rotating shaft through a universal coupling, the other end of the rotating shaft is connected with an elliptical wheel, and the elliptical wheel is fixedly connected to the rotating shaft; the elliptical wheel can rotate along with the rotating shaft in the circumferential direction; and the side wall of the box body is provided with a rubber elastic sheet. The invention provides a method for purifying coal-fired tail gas of a power plant, which uses a purifying device, and squeezes a rubber elastic sheet on the side wall of a box body through circumferential rotation of an elliptical wheel in the box body, so that a cleaning solution in the rubber elastic sheet is squeezed and sprayed out, the cleaning solution and waste gas are fully reacted, and high-efficiency denitration is realized.
Description
Technical Field
The invention belongs to the field of coal-fired tail gas treatment, and particularly relates to a method for purifying coal-fired tail gas of a power plant.
Background
China has abundant coal resources and is one of main energy sources, but with the use of coal, environmental problems are obvious, tail gas is discharged outwards during the combustion of the coal, and the tail gas contains a large amount of SOx, SO2, N2O and other pollution gases. According to statistics, 90% of SOx, 71% of CO, 85% of CO2, 70% of NOx and 70% of smoke dust in the atmospheric pollutants are all from direct combustion of raw coal, so that the coal-fired tail gas is the main cause of air pollution in China. In order to further improve the air quality of urban environment and strengthen the pollution control of coal-fired steam boilers, a coal-fired flue gas denitration and desulfurization method is urgently needed to be found. The invention provides a method for purifying coal-fired tail gas of a power plant.
The technical scheme of the flue gas desulfurization, denitrification and dust removal device also appears in the prior art, and as disclosed in a Chinese patent with application number 201720526904.7, the flue gas desulfurization, denitrification and dust removal device comprises a base, wherein a barrel body is arranged at the upper end of the base, an air inlet pipe is arranged on one side wall of the barrel body, an water outlet pipe is arranged on the other side wall of the barrel body, a driving motor is arranged at the upper end of the barrel body, a first rotating shaft is arranged at the tail end of an output shaft of the driving motor and penetrates through the barrel body and extends into the barrel body, a fixed block is arranged at one end, away from the driving motor, of the first rotating shaft, a locking device is arranged at the lower end of the fixed block, the locking device comprises an annular disc, a plurality of sliding cavities are arranged on the inner side wall of the annular disc, movable plates are arranged in the sliding cavities, the movable plates are, the fixing piece is far away from the movable plate and is provided with a fixing piece. The technical scheme has the advantages of simple structure and convenient use, and effectively realizes desulfurization and denitrification; however, the solution is not sufficiently stirred, and the flue gas cannot be sufficiently contacted with the solution, so that the flue gas cannot be sufficiently desulfurized and denitrated, and the purification efficiency of the flue gas is influenced.
The invention provides a method for purifying coal-fired tail gas of a power plant, which uses a purification device for denitration treatment, and the device enables washing liquid in a box body to fully react with waste gas by arranging an elliptical wheel in the box body, thereby realizing high-efficiency denitration.
Disclosure of Invention
In order to make up for the defects of the prior art, the method for purifying the coal-fired tail gas of the power plant, provided by the invention, has the advantages that the elliptical wheel is arranged in the box body, when the elliptical wheel is driven by the output shaft of the motor to rotate along with the circumferential direction, the rubber elastic sheet arranged on the side wall of the box body is extruded, the cleaning solution in the inner cavity of the rubber elastic sheet is extruded along with the contraction of the rubber elastic sheet, the flowability of the cleaning solution is increased, the full reaction of the cleaning solution and waste gas is finally realized, and the.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a method for purifying coal-fired tail gas of a power plant, which comprises the following steps:
the method comprises the following steps: spraying and washing the coal-fired tail gas containing nitrogen oxides and sulfides;
step two: introducing the coal-fired tail gas washed in the step one into a dust removal device for dust removal;
step three: introducing the coal-fired tail gas subjected to dust removal in the step two into a purification device for denitration treatment;
step four: detecting the denitrated coal-fired tail gas in the third step to be qualified and then discharging;
the purifying device comprises an air inlet pipe, a box body and an air outlet pipe, wherein the air inlet pipe is arranged on one side of the bottom of the box body; the top of the box body is provided with an air outlet pipe; the output shaft of the motor is connected with one end of a rotating shaft through a universal coupling, and the other end of the rotating shaft is connected with an elliptical wheel; the elliptical wheel is fixedly connected to the rotating shaft; the elliptical wheel can rotate along with the rotating shaft in the circumferential direction; the side wall of the box body is provided with a rubber elastic sheet which is used for extruding the washing liquid. During operation, inside waste gas passed through the intake pipe entering box, starter motor simultaneously, motor output shaft drove elliptical wheel circumferential direction, extrudees the rubber shrapnel that sets up on the box lateral wall, simultaneously along with rubber shrapnel is the internal contraction, the washing liquid of rubber shrapnel inner chamber receives the extrusion to increase the mobility of washing liquid, make washing liquid and waste gas fully react, and then improve the denitration efficiency of device.
As a preferred scheme of the present invention, the rubber elastic sheet is provided with an inclined hole, and a compression rod is arranged in the inclined hole and connected with the rubber elastic sheet through a spring. During the use, the elliptical wheel rotates extrusion rubber shell fragment and can produce great impact force, and the last downthehole compression pole of chute of rubber shell fragment can cushion impact force on the one hand, and on the other hand can make the washing liquid blowout in the chute, increases the mobility of washing liquid, and then improves the denitration efficiency of device.
As a preferred scheme of the invention, a steel ball is arranged in the cavity of the rubber elastic sheet and is connected with one end of the rubber elastic sheet through a first spring. During the use, the elliptical wheel rotates extrusion rubber shell fragment, and the steel ball in the rubber shell fragment moves to one side along with the extrusion of elliptical wheel, when rotating away from this rubber shell fragment along with the elliptical wheel, the steel ball restores the primary importance under the effect of first spring, makes the rubber shell fragment kick-back under the extrusion of steel ball, and then improves the response speed of device.
In a preferred embodiment of the present invention, the steel ball is disposed in an elliptical shape. When the device is used, the steel ball arranged in the rubber elastic sheet in an oval shape rotates away from the rubber elastic sheet along with the oval wheel, and when the oval steel ball returns to the original position, the resistance to movement in the washing liquid is reduced, the moving speed is increased, and the response speed of the device is further increased.
As a preferable scheme of the invention, the bottom of the elliptical wheel is provided with an annular groove; an included angle between the plane of the annular groove and the plane of the elliptical wheel is 5-10 degrees; the bottom of the box body is provided with a connecting rod, and the end of the connecting rod is provided with a ball which is slidably mounted in the annular groove. During the use, the elliptical aperture rotates, and the ball of slidable mounting in the ring channel that the connecting rod end set up slides in the ring channel, sets up nonparallel through the plane that sets up ring channel and elliptical wheel the two, makes pivoted elliptical wheel swing on under the effect of connecting rod, extrudees the different positions of rubber shell fragment, makes the mobile increase of washing liquid, and then increases the denitration efficiency of device.
As a preferable scheme of the invention, the bottom of the annular groove is provided with a conical surface, and the end cap of the connecting rod is sleeved with a conical rubber cushion; the connecting rod is in clearance fit with the conical rubber pad; the conical rubber pad can eccentrically rotate around the connecting rod in the same direction. When the connecting rod is used, the elliptical wheel deflects under the action of the connecting rod, and the conical rubber pad sleeved at the end of the connecting rod can buffer the lateral pressure of the connecting rod when the elliptical wheel deflects, so that the service life of the connecting rod is prolonged.
In a preferred embodiment of the present invention, the bottom surface of the conical rubber pad is provided with an annular V-shaped groove. During the use, the elliptical wheel deflects under the effect of connecting rod, and the cyclic annular V-arrangement groove that elliptical wheel toper cushion bottom set up can be to the elliptical wheel shock attenuation on the one hand, and on the other hand can outwards extrude the interior washing liquid of V-arrangement groove, increases the mobility of washing liquid to improve device's denitration efficiency.
The invention has the following beneficial effects:
1. according to the method for purifying the coal-fired tail gas of the power plant, the elliptical wheel is arranged in the box body, when the elliptical wheel is driven by the output shaft of the motor to rotate along with the circumferential direction, the rubber elastic sheet arranged on the side wall of the box body is extruded, and the cleaning solution in the inner cavity of the rubber elastic sheet is extruded along with the contraction of the rubber elastic sheet, so that the flowability of the cleaning solution is increased, the full reaction of the cleaning solution and the waste gas is finally realized, and the high-efficiency denitration is realized.
2. According to the method for purifying the coal-fired tail gas of the power plant, the inclined holes are formed in the rubber elastic sheet, the compression rods connected through the springs are arranged in the inclined holes, when the elliptical wheel rotates to extrude the rubber elastic sheet, large impact force can be generated, the compression rods in the inclined holes in the rubber elastic sheet can buffer the impact force on one hand, and on the other hand, cleaning solution in the inclined holes can be sprayed out, so that the flowability of the cleaning solution is increased, and the denitration efficiency of the device is improved.
3. According to the method for purifying the tail gas of the coal fired in the power plant, the steel ball connected through the first spring is arranged in the cavity of the rubber elastic sheet, when the rubber elastic sheet is extruded by the rotation of the elliptical wheel, the steel ball in the rubber elastic sheet moves to one side along with the extrusion of the elliptical wheel, and when the elliptical wheel rotates away from the rubber elastic sheet, the steel ball returns to the original position under the action of the first spring, so that the rubber elastic sheet rebounds under the extrusion of the steel ball, and the response speed of the device is further improved; meanwhile, the steel ball is set to be oval, so that when the steel ball returns to the original position, the resistance to movement in the cleaning solution is reduced, the movement speed is increased, and the response speed of the device is further increased.
4. According to the method for purifying the coal-fired tail gas of the power plant, the ball which is slidably arranged in the annular groove is arranged at the end of the connecting rod, the planes of the annular groove and the elliptical wheel are not parallel, so that the rotating elliptical wheel swings upwards under the action of the connecting rod to extrude different positions of the rubber elastic sheet, the flowability of the washing liquid is increased, and the denitration efficiency of the device is further increased; the end of the connecting rod is sleeved with the conical rubber pad, so that the elliptical wheel deflects under the action of the connecting rod, and the conical rubber pad can buffer the lateral pressure of the connecting rod when the elliptical wheel deflects, thereby prolonging the service life of the connecting rod; and the toper cushion bottom surface is equipped with annular V-arrangement groove, deflects under the effect of connecting rod when the elliptical wheel, and the annular V-arrangement groove that elliptical wheel toper cushion bottom set up can be to the elliptical wheel shock attenuation on the one hand, and on the other hand can outwards extrude the interior washing liquid of V-arrangement groove, increases the mobility of washing liquid to improve the denitration efficiency of device.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a schematic view showing the overall structure of a purification apparatus used in the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at B;
FIG. 4 is a cross-sectional view A-A of FIG. 2;
in the figure: the air inlet pipe comprises an air inlet pipe 1, a box body 2, an air outlet pipe 3, a universal coupling 4, a motor output shaft 5, a rotating shaft 6, an elliptical wheel 71, a rubber elastic sheet 72, a compression rod 8, a steel ball 9, a first spring 91, an annular groove 10, a connecting rod 11, a ball 12, a conical rubber pad 13, a conical surface 14 and a V-shaped groove 15.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 4, the method for purifying coal-fired tail gas of a power plant according to the present invention comprises the following steps:
the method comprises the following steps: spraying and washing the coal-fired tail gas containing nitrogen oxides and sulfides;
step two: introducing the coal-fired tail gas washed in the step one into a dust removal device for dust removal;
step three: introducing the coal-fired tail gas subjected to dust removal in the step two into a purification device for denitration treatment;
step four: detecting the denitrated coal-fired tail gas in the third step to be qualified and then discharging;
the purifying device comprises an air inlet pipe 1, a box body 2 and an air outlet pipe 3, wherein the air inlet pipe 1 is arranged on one side of the bottom of the box body 2; the top of the box body 2 is provided with an air outlet pipe 3; the motor output shaft 5 is connected with one end of a rotating shaft 6 through a universal coupling 4, the other end of the rotating shaft 6 is connected with an elliptical wheel 71, and the elliptical wheel 71 is fixedly connected on the rotating shaft 6; the elliptical wheel 71 can rotate along with the rotating shaft 6 in the circumferential direction; the side wall of the box body 2 is provided with a rubber elastic sheet 72, and the rubber elastic sheet 72 is used for extruding the washing liquid. During operation, inside waste gas got into box 2 through intake pipe 1, starter motor simultaneously, motor output shaft 5 drove elliptical wheel 71 circumferential direction, extrudees the rubber shell fragment 72 that sets up on the 2 lateral walls of box, simultaneously along with rubber shell fragment 72 is to the internal contraction, the washing liquid of rubber shell fragment 72 inner chamber receives the extrusion to increase the mobility of washing liquid, make washing liquid and waste gas fully react, and then improve the denitration efficiency of device.
As an embodiment of the present invention, the rubber elastic sheet 72 is provided with an inclined hole, a compression rod 8 is disposed in the inclined hole, and the compression rod 8 is connected to the rubber elastic sheet 72 through a spring. During the use, the elliptical wheel 71 rotates extrusion rubber shell fragment 72 and can produce great impact force, and the compression pole 8 in the inclined hole on the rubber shell fragment 72 can cushion impact force on the one hand, and on the other hand can make the washing liquid blowout in the inclined hole, increases the mobility of washing liquid, and then improves the denitration efficiency of device.
As an embodiment of the present invention, a steel ball 9 is disposed in the cavity of the rubber elastic sheet 72, and the steel ball 9 is connected to one end of the rubber elastic sheet 72 through a first spring 91. During the use, oval wheel 71 rotates extrusion rubber shell fragment 72, and steel ball 9 in the rubber shell fragment 72 moves to one side along with oval wheel 71's extrusion, and when leaving this rubber shell fragment 72 along with oval wheel 71 rotates, steel ball 9 restores the primary importance under the effect of first spring 91, makes rubber shell fragment 72 kick-back under the extrusion of steel ball 9, and then improves the response speed of device.
As an embodiment of the present invention, the steel ball 9 is provided in an elliptical shape. When the device is used, the steel ball 9 arranged in the rubber elastic sheet 72 in an oval shape leaves the rubber elastic sheet 72 along with the rotation of the oval wheel 71, and when the oval steel ball 9 returns to the original position, the resistance to movement in the cleaning solution is reduced, the movement speed is increased, and the response speed of the device is further increased.
As an embodiment of the present invention, the bottom of the elliptical wheel 71 is provided with an annular groove 10; an included angle between the plane of the annular groove 10 and the plane of the elliptical wheel 71 is 5-10 degrees; the bottom of the box body 2 is provided with a connecting rod 11, and the end of the connecting rod 11 is provided with a ball 12 which is slidably arranged in the annular groove 10. During the use, the elliptical aperture rotates, and the ball 12 of slidable mounting in ring channel 10 that connecting rod 11 end set up slides in ring channel 10, sets up nonparallel through the plane that ring channel 10 and elliptical wheel 71 are the two, makes pivoted elliptical wheel 71 swing on under connecting rod 11's effect, extrudees the different positions of rubber shell fragment 72, makes the mobile increase of washing liquid, and then increases the denitration efficiency of device.
As an embodiment of the invention, the bottom of the annular groove 10 is provided with a conical surface 14, and the end of the connecting rod 11 is sleeved with a conical rubber cushion 13; the connecting rod 11 is in clearance fit with the conical rubber pad 13; the conical rubber pad 13 can eccentrically rotate around the connecting rod 11 in the same direction. When the device is used, the elliptical wheel 71 deflects under the action of the connecting rod 11, and the conical rubber pad 13 sleeved at the end of the connecting rod 11 can buffer the lateral pressure of the elliptical wheel 71 on the connecting rod 11 during deflection, so that the service life of the connecting rod 11 is prolonged.
In one embodiment of the present invention, the conical rubber pad 13 is provided with an annular V-shaped groove 15 on the bottom surface. During the use, oval wheel 71 deflects under the effect of connecting rod 11, and the cyclic annular V-arrangement groove 15 that oval wheel 71 toper cushion 13 bottom set up can be to oval wheel 71 shock attenuation on the one hand, and on the other hand can outwards extrude the washing liquid in the V-arrangement groove 15, increases the mobility of washing liquid to improve the denitration efficiency of device.
When the device is used, when waste gas enters the box body 2 through the gas inlet pipe 1, the motor is started at the same time, the motor output shaft 5 drives the elliptical wheel 71 to rotate circumferentially to extrude the rubber elastic sheet 72 arranged on the side wall of the box body 2, and along with inward contraction of the rubber elastic sheet 72, washing liquid in the inner cavity of the rubber elastic sheet 72 is extruded, so that the flowability of the washing liquid is increased, the washing liquid and the waste gas are fully reacted, and the denitration efficiency of the device is improved; the rubber elastic sheet 72 is provided with the inclined hole, the compression rod 8 connected through the spring is arranged in the inclined hole, when the elliptical wheel 71 rotates to extrude the rubber elastic sheet 72, large impact force can be generated, on one hand, the compression rod 8 in the inclined hole in the rubber elastic sheet 72 can buffer the impact force, on the other hand, cleaning solution in the inclined hole can be sprayed out, the flowability of the cleaning solution is increased, and the denitration efficiency of the device is further improved; the steel ball 9 connected through the first spring 91 is arranged in the cavity of the rubber elastic sheet 72, when the elliptical wheel 71 rotates to extrude the rubber elastic sheet 72, the steel ball 9 in the rubber elastic sheet 72 moves to one side along with the extrusion of the elliptical wheel 71, and when the elliptical wheel 71 rotates to leave the rubber elastic sheet 72, the steel ball 9 returns to the original position under the action of the first spring 91, so that the rubber elastic sheet 72 rebounds under the extrusion of the steel ball 9, and the response speed of the device is further improved; meanwhile, the steel ball 9 is designed to be oval, so that when the steel ball 9 returns to the original position, the resistance to movement in the cleaning solution is reduced, the movement speed is increased, and the response speed of the device is further increased; along with the rotation of the elliptical hole, the ball 12 arranged at the end of the connecting rod 11 and slidably arranged in the annular groove 10 slides in the annular groove 10, and the planes of the annular groove 10 and the elliptical wheel 71 are not parallel, so that the rotating elliptical wheel 71 swings upwards under the action of the connecting rod 11 to extrude different positions of the rubber elastic sheet 72, so that the flowability of the washing liquid is increased, and the denitration efficiency of the device is further increased; the end of the connecting rod 11 is sleeved with the conical rubber pad 13, so that the elliptical wheel 71 deflects under the action of the connecting rod 11, and the conical rubber pad 13 can buffer the lateral pressure of the elliptical wheel 71 on the connecting rod 11 during deflection, thereby prolonging the service life of the connecting rod 11; and the annular V-shaped groove 15 is arranged on the bottom surface of the conical rubber pad 13, when the elliptical wheel 71 deflects under the action of the connecting rod 11, the annular V-shaped groove 15 arranged at the bottom of the conical rubber pad 13 of the elliptical wheel 71 can absorb shock to the elliptical wheel 71 on one hand, and on the other hand, can extrude the cleaning solution in the V-shaped groove 15 outwards to increase the flowability of the cleaning solution, so that the denitration efficiency of the device is improved.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. A method for purifying coal-fired tail gas of a power plant is characterized by comprising the following steps:
the method comprises the following steps: spraying and washing the coal-fired tail gas containing nitrogen oxides and sulfides;
step two: introducing the coal-fired tail gas washed in the step one into a dust removal device for dust removal;
step three: introducing the coal-fired tail gas subjected to dust removal in the step two into a purification device for denitration treatment;
step four: detecting the denitrated coal-fired tail gas in the third step to be qualified and then discharging;
the purification device comprises an air inlet pipe (1), a box body (2) and an air outlet pipe (3), wherein the air inlet pipe (1) is arranged on one side of the bottom of the box body (2); the top of the box body (2) is provided with an air outlet pipe (3); the motor output shaft (5) is connected with one end of a rotating shaft (6) through a universal coupling (4), the other end of the rotating shaft (6) is connected with an elliptical wheel (71), and the elliptical wheel (71) is fixedly connected to the rotating shaft (6); the elliptic wheel (71) can rotate along with the rotating shaft (6) in the circumferential direction; the side wall of the box body (2) is provided with a rubber elastic sheet (72); the rubber elastic sheet (72) is used for extruding the washing liquid; the rubber elastic sheet (72) is provided with an inclined hole, a compression rod (8) is arranged in the inclined hole, and the compression rod (8) is connected with the rubber elastic sheet (72) through a spring; a steel ball (9) is arranged in a cavity of the rubber elastic sheet (72), and the steel ball (9) is connected with one end of the rubber elastic sheet (72) through a first spring (91); the steel ball (9) is arranged in an oval shape; the bottom of the elliptical wheel (71) is provided with an annular groove (10); an included angle between the plane of the annular groove (10) and the plane of the elliptical wheel (71) is 5-10 degrees; the bottom of the box body (2) is provided with a connecting rod (11), the end of the connecting rod (11) is provided with a ball (12) which is slidably mounted in the annular groove (10), when the motor output shaft (5) drives the elliptical wheel (71) to rotate along with the circumferential direction, the rubber elastic sheet (72) arranged on the side wall of the box body (2) is extruded, and along with the contraction of the rubber elastic sheet (72), the washing liquid in the inner cavity of the rubber elastic sheet (72) is extruded.
2. The method for purifying the tail gas of the coal fired in the power plant according to the claim 1, which is characterized in that: the bottom of the annular groove (10) is provided with a conical surface (14), and the end of the connecting rod (11) is sleeved with a conical rubber cushion (13); the connecting rod (11) is in clearance fit with the conical rubber pad (13); the conical rubber pad (13) can eccentrically rotate around the connecting rod (11) in the same direction.
3. The method for purifying the tail gas of the coal fired in the power plant according to the claim 2, characterized in that: the bottom surface of the conical rubber mat (13) is provided with an annular V-shaped groove (15).
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| CN104492147A (en) * | 2014-12-25 | 2015-04-08 | 常州商瑞服饰有限公司 | Spraying filtering device |
| CN205627637U (en) * | 2016-05-23 | 2016-10-12 | 湖北陆盛环保工程有限公司 | Low temperature deNOx systems |
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