CN111468510A - Device and method for treating alkaline hazardous waste by using clean flue gas of coal-fired power plant - Google Patents
Device and method for treating alkaline hazardous waste by using clean flue gas of coal-fired power plant Download PDFInfo
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- CN111468510A CN111468510A CN202010310159.9A CN202010310159A CN111468510A CN 111468510 A CN111468510 A CN 111468510A CN 202010310159 A CN202010310159 A CN 202010310159A CN 111468510 A CN111468510 A CN 111468510A
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- flue gas
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 239000003546 flue gas Substances 0.000 title claims abstract description 53
- 239000002920 hazardous waste Substances 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000007921 spray Substances 0.000 claims abstract description 110
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 65
- 239000003518 caustics Substances 0.000 claims abstract description 31
- 239000010802 sludge Substances 0.000 claims abstract description 31
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000000227 grinding Methods 0.000 claims abstract description 13
- 239000002002 slurry Substances 0.000 claims description 41
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 22
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 22
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 11
- 239000001569 carbon dioxide Substances 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 11
- 239000002893 slag Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 238000006386 neutralization reaction Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 239000003245 coal Substances 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims 6
- 239000008187 granular material Substances 0.000 claims 1
- 230000003472 neutralizing effect Effects 0.000 claims 1
- 238000011017 operating method Methods 0.000 claims 1
- 239000013049 sediment Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000003513 alkali Substances 0.000 description 9
- 239000000126 substance Substances 0.000 description 6
- 238000006477 desulfuration reaction Methods 0.000 description 5
- 230000023556 desulfurization Effects 0.000 description 5
- 239000003595 mist Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
Abstract
The invention discloses a device and a method for treating alkaline hazardous waste by using clean flue gas of a coal-fired power plant, which comprises a spray tower, a centrifugal dehydrator, an alkaline material grinding device, a spiral feeding device, a desulfurizing tower and a chimney, wherein the spray tower is connected with the centrifugal dehydrator; the bottom of spray tower is the toper structure, and the bottom middle part fixedly connected with pipeline one of spray tower, fixedly connected with solenoid valve on the pipeline one, the bottom fixedly connected with centrifugal dehydrator of pipeline one, centrifugal dehydrator passes through pipeline two and the left side outer wall bottom fixed connection of spray tower, fixedly connected with water pump one on the pipeline two, the left side outer wall lower extreme fixedly connected with motor of spray tower, the power take off end fixedly connected with pivot of motor, the pivot runs through the inside of spray tower, and the pivot rotates with the inside right side wall of spray tower to be connected, it has the blade to fix on the outer wall of pivot. The invention has scientific and reasonable structure, good treatment effect on the caustic sludge, low manufacturing cost and suitability for popularization and use.
Description
Technical Field
The invention relates to an alkali residue treatment device, in particular to a device for treating alkaline hazardous waste by using clean flue gas of a coal-fired power plant.
Background
The clean flue gas discharged after desulfurization of the coal-fired power plant contains 10-15% of carbon dioxide and a small amount of sulfur dioxide acid gas by volume fraction. A certain amount of caustic sludge is generated in the process of industrially producing lime milk or other chemical products, the caustic sludge is a high-corrosivity substance, the pH value of a leaching solution of the substance is more than or equal to 12.5, the substance belongs to dangerous waste, the substance needs to be treated, and the substance can be discharged after being treated. At present, the alkali residue is generally treated by adding acid for neutralization, so that the cost is high, and a large amount of manpower and material resources are wasted. Carbon dioxide and sulfur dioxide in clean flue gas of a coal-fired power plant can neutralize alkaline residues, and the pH value of the alkaline residues is reduced to be away from the standard of hazardous wastes, so that a device for treating alkaline hazardous wastes by using the clean flue gas of the coal-fired power plant is provided.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a device and a method for treating alkaline hazardous waste by using clean flue gas of a coal-fired power plant, which can combine the treatment of carbon dioxide and sulfur dioxide in the flue gas of the coal-fired power plant with the treatment of alkaline residue, thereby solving the problem of alkaline residue treatment.
The technical scheme adopted by the invention for solving the problems is as follows: the utility model provides an utilize useless device of coal fired power plant clean flue gas processing basicity danger which characterized in that: comprises a spray tower, a centrifugal dehydrator, an alkaline material grinding device, a spiral feeding device, a desulfurizing tower and a chimney; the bottom of the spray tower is of a conical structure, the middle part of the bottom end of the spray tower is fixedly connected with a first pipeline, the first pipeline is fixedly connected with an electromagnetic valve, the bottom end of the first pipeline is fixedly connected with a centrifugal dehydrator, the centrifugal dehydrator is fixedly connected with the bottom end of the outer wall of the left side of the spray tower through a second pipeline, the second pipeline is fixedly connected with a first water pump, the lower end of the outer wall of the left side of the spray tower is fixedly connected with a motor, the power output end of the motor is fixedly connected with a rotating shaft, the rotating shaft penetrates through the interior of the spray tower and is rotatably connected with the right side wall of the interior of the spray tower, the outer wall of the rotating shaft is fixedly connected with a blade, the outer wall of the left side of the spray tower is positioned above the motor and is fixedly connected with a third pipeline, the, the upper end of the pipeline III is fixedly connected with a water outlet pipe, the bottom end of the water outlet pipe is fixedly connected with a spray head, and the top end inside the spray tower is fixedly connected with a demister; alkaline material grinder's bottom is through pipeline four and spiral material feeding unit's feed inlet fixed connection, spiral material feeding unit's discharge gate is through pipeline five and spray column fixed connection, desulfurizing tower and chimney pass through pipeline six intercommunication, fixedly connected with pipeline seven on the pipeline six, pipeline seven keeps away from pipeline six one end and spray column's middle part fixed connection, pipeline seven goes up fixedly connected with fan, the left side fixedly connected with pipeline eight of desulfurizing tower, the one end that desulfurizing tower was kept away from to pipeline eight and spray column's top middle part fixed connection.
Furthermore, the blades are provided with a plurality of blades which are uniformly and fixedly connected to the rotating shaft.
Furthermore, the spray headers are provided with a plurality of spray headers which are uniformly and fixedly connected at the bottom end of the water outlet pipe.
Furthermore, the seventh pipeline penetrates through the spray tower and enters the interior of the spray tower, and one end of the seventh pipeline in the spray tower is positioned below the spray header.
Furthermore, the middle part of the outer wall of the right side of the spray tower is fixedly connected with a water injection pipe, and the water injection pipe is fixedly connected with a valve.
Further, the bottom end of the outer wall of the right side of the spray tower is fixedly connected with a pH value detector.
Furthermore, the right side of the centrifugal dehydrator is fixedly connected with a slag discharge pipe.
The working method of the device for treating alkaline hazardous waste by using clean flue gas of the coal-fired power plant is characterized in that: the process is as follows: when in use, firstly, the caustic sludge is put into an alkaline material grinding device for grinding, then the caustic sludge enters a spiral feeding device through a pipeline four, the spiral feeding device conveys ground caustic sludge particles into a spray tower through a pipeline five, a valve on a water injection pipe is opened, water is injected into the spray tower, after the caustic sludge particles and the water are injected into the spray tower, a motor is started, the motor drives a rotating shaft to rotate, the rotating shaft drives a blade to rotate, the rotating blade stirs the caustic sludge particles and the water to form caustic sludge slurry, then a water pump two is started, the caustic sludge slurry is conveyed into a water outlet pipe and then is sprayed out from a spray head, the caustic sludge slurry finally falls to the bottom of the spray tower, then the mixture is continuously stirred and extracted to form circulation, a fan is started, the fan extracts flue gas from a pipeline six through a pipeline seven, the flue gas enters the spray tower from the pipeline seven, and the flue gas enters the spray tower, fully contacts with alkaline residue slurry sprayed by a spray header above, carbon dioxide and sulfur dioxide in flue gas neutralize alkaline residue in the alkaline residue slurry, the pH value of the alkaline residue is reduced, the flue gas passes through a demister after neutralization reaction with the alkaline residue slurry, the fog drop amount carried by the flue gas is reduced, the flue gas is discharged from a spray tower through a pipeline eight and then enters a desulfurization tower, the circulation is carried out, the alkaline residue slurry sprayed by the spray header is continuously neutralized with the carbon dioxide and the sulfur dioxide in the flue gas, the pH value of the alkaline residue in the alkaline residue slurry is continuously reduced, the pH value of the alkaline residue slurry is detected through a pH value detector, when the pH value of the alkaline residue slurry is reduced to a standard value, the work of a motor, a water pump two and a fan is stopped, an electromagnetic valve is opened, the alkaline residue slurry enters a centrifugal dehydrator through the pipeline one, the centrifugal dehydrator separates the alkaline residue from the alkaline residue slurry, and water is pumped into the spray tower through the pipeline two by the water pump one, and (4) continuously using, discharging the alkali residue with qualified pH value to a specified place through a residue discharge pipe, then continuously injecting water into the spray tower and inputting alkali residue particles, and then carrying out the next round of alkali residue treatment operation.
Compared with the prior art, the invention has the following advantages and effects: the novel method is adopted, carbon dioxide and sulfur dioxide in the flue gas of the coal-fired power plant are utilized to treat the alkali slag, so that the carbon dioxide and the sulfur dioxide in the flue gas of the coal-fired power plant are purified, the alkali slag is treated, and the cost for treating the alkali slag is greatly saved. The invention has scientific and reasonable structure, good treatment effect on the caustic sludge, low manufacturing cost and suitability for popularization and use.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for treating alkaline hazardous waste by using clean flue gas of a coal-fired power plant in the embodiment of the invention.
In the figure: the device comprises a spray tower 1, a first pipeline 2, a centrifugal dehydrator 3, an electromagnetic valve 4, a second pipeline 5, a first water pump 6, a motor 7, a rotating shaft 8, a blade 9, a third pipeline 10, a second water pump 11, a water outlet pipe 12, a spray header 13, a demister 14, an alkaline material grinding device 15, a fourth pipeline 16, a spiral feeding device 17, a fifth pipeline 18, a desulfurizing tower 19, a chimney 20, a sixth pipeline 21, a seventh pipeline 22, a fan 23, an eighth pipeline 24, a water injection pipe 25, a pH value detector 26 and a slag discharge pipe 27.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Referring to fig. 1, in the embodiment, a device for treating alkaline hazardous waste by using clean flue gas of a coal-fired power plant includes a spray tower 1, a centrifugal dehydrator 3, an alkaline material grinding device 15, a spiral feeding device 17, a desulfurizing tower 19 and a chimney 20; the bottom of the spray tower 1 is of a conical structure, a pipeline I2 is fixedly connected to the middle of the bottom end of the spray tower 1, an electromagnetic valve 4 is fixedly connected to the pipeline I2, the electromagnetic valve 4 is convenient for controlling caustic sludge slurry with the pH value concentration reaching the standard to be discharged into a centrifugal dehydrator 3, the centrifugal dehydrator 3 is fixedly connected to the bottom end of the pipeline I2, the caustic sludge slurry can be subjected to slag-water separation by the centrifugal dehydrator 3, the centrifugal dehydrator 3 is fixedly connected to the bottom end of the outer wall of the left side of the spray tower 1 through a pipeline II 5, a water pump I6 is fixedly connected to the pipeline II 5, the water pump I6 can convey the separated water into the spray tower 1 for continuous use, a motor 7 is fixedly connected to the lower end of the outer wall of the left side of the spray tower 1, a rotating shaft 8 is fixedly connected to the power output end of the motor 7, the rotating shaft 8 penetrates through, a sealing gasket is arranged between the left side of the rotating shaft 8 and the outer wall of the spray tower 1, the left side of the rotating shaft 8 is in dynamic sealing fit with the outer wall of the spray tower 1 to prevent liquid leakage, the right end of the rotating shaft 8 is rotatably connected with the inner wall of the right side of the spray tower 1 through a bearing, so that the rotating shaft 8 can stably run, a blade 9 is fixedly connected to the outer wall of the rotating shaft 8, the motor 7 drives the rotating shaft 8 and the blade 9 to rotate to stir the alkaline residue slurry, a pipeline III 10 is fixedly connected to the outer wall of the left side of the spray tower 1 above the motor 7, a water pump II 11 is fixedly connected to the pipeline III 10, the upper end of the pipeline III 10 penetrates into the spray tower 1, a water outlet pipe 12 is fixedly connected to the upper end of the pipeline III 10, a spray head 13 is fixedly connected to the bottom end of the water outlet pipe 12, the spray head 13, the demister 14 can remove water mist in the flue gas; the bottom end of the alkaline material grinding device 15 is fixedly connected with the feed inlet of the spiral feeding device 17 through a pipeline four 16, the discharge outlet of the spiral feeding device 17 is fixedly connected with the spray tower 1 through a pipeline five 18, the alkaline material grinding device 15 can grind alkaline residues into fine particles and convey the fine particles into the spray tower 1 through the spiral feeding device 17, the desulfurization tower 19 is communicated with the chimney 20 through a pipeline six 21, a pipeline seven 22 is fixedly connected onto the pipeline six 21, one end, away from the pipeline six 21, of the pipeline seven 22 is fixedly connected with the middle of the spray tower 1, a fan 23 is fixedly connected onto the pipeline seven 22, the pipeline seven 22 can convey flue gas into the spray tower 1, a pipeline eight 24 is fixedly connected onto the left side of the desulfurization tower 19, one end, away from the desulfurization tower 19, of the pipeline eight 24 is fixedly connected with the middle of the top end of the spray tower 1, and the pipeline eight 24 can.
In the embodiment, a plurality of blades 9 are arranged, the blades 9 are uniformly and fixedly connected to the rotating shaft 8, and the blades 9 are convenient for stirring the alkaline residue slurry; a plurality of spray heads 13 are arranged, and the spray heads 13 are uniformly and fixedly connected to the bottom end of the water outlet pipe 12, so that the alkaline residue slurry can be uniformly sprayed out conveniently and can be fully contacted with the flue gas; a seventh pipeline 22 penetrates through the spray tower 1 and enters the spray tower 1, and one end of the seventh pipeline 22 in the spray tower 1 is positioned below the spray header 13, so that the alkali residue slurry sprayed downwards can be fully contacted with the flue gas; the middle part of the outer wall of the right side of the spray tower 1 is fixedly connected with a water injection pipe 25, and the water injection pipe 25 is fixedly connected with a valve, so that the entering of an external water source is conveniently controlled; the bottom end of the outer wall of the right side of the spray tower 1 is fixedly connected with a pH value detector 26, so that the pH value concentration of the alkaline residue slurry can be conveniently detected; the right side of the centrifugal dehydrator 3 is fixedly connected with a slag discharge pipe 27, which is convenient for discharging the caustic sludge.
The electrical components in this embodiment are all electrically connected to an external master controller and 220V mains, and the master controller may be a conventional known device such as a computer for controlling.
The working method comprises the following steps: when in use, firstly, the caustic sludge is put into an alkaline material grinding device 15 for grinding, then enters a spiral feeding device 17 through a pipeline four 16, the spiral feeding device 17 conveys ground caustic sludge particles into a spray tower 1 through a pipeline five 18, a valve on a water injection pipe 25 is opened, water is injected into the spray tower 1, after the caustic sludge particles and the water are injected into the spray tower 1, a motor 7 is started, the motor 7 drives a rotating shaft 8 to rotate, the rotating shaft 8 drives a blade 9 to rotate, the rotating blade 9 stirs the caustic sludge particles and the water to form caustic sludge slurry, then a water pump two 11 is started, the caustic sludge slurry is conveyed into a water outlet pipe 12 by the water pump two 11 and then is sprayed out from a spray head 13, the caustic sludge slurry finally falls to the bottom of the spray tower 1 and then continues to be stirred and extracted to form circulation, a fan 23 is started, the fan 23 extracts flue gas from a pipeline six 21 through a pipeline seven 22, (it should be noted here that the coal-fired power plant needs to perform special treatment on the flue gas, the flue gas treatment has a set of special system, the treatment system includes other treatment equipment, a desulfurizing tower 19 and a chimney 20, the flue gas enters the desulfurizing tower 19 from other equipment and then enters the chimney 20 from the desulfurizing tower 19 through a pipeline six 21, the whole treatment system is the prior art known to those skilled in the art, the flue gas required in the present invention is extracted from the pipeline six 21 between the desulfurizing tower 19 and the chimney 20), the flue gas enters the spray tower 1 through a pipeline seven 22, after entering the spray tower 1, the flue gas is fully contacted with the alkaline residue slurry sprayed by the spray header 13 above, the carbon dioxide and the sulfur dioxide in the flue gas neutralize the alkaline residue slurry, the pH value of the alkaline residue is reduced, after the flue gas is neutralized and reacted with the alkaline residue slurry, the mist carrying amount of the flue gas is reduced through the mist eliminator 14, then the alkaline residue slurry sprayed out of the spray tower 1 through a pipeline eight 24 is discharged into a desulfurizing tower 19, the circulation is carried out, the alkaline residue slurry sprayed out of the spray head 13 continuously generates a neutralization reaction with carbon dioxide and sulfur dioxide in flue gas, the pH value of the alkaline residue in the alkaline residue slurry is continuously reduced, the alkaline residue slurry is detected through a pH value detector 26, when the pH value of the alkaline residue slurry is reduced to a standard value, the work of a motor 7, a water pump two 11 and a fan 23 is stopped, an electromagnetic valve 4 is opened, the alkaline residue slurry enters a centrifugal dehydrator 3 from a pipeline one 2, the centrifugal dehydrator 3 carries out residue-water separation on the alkaline residue slurry, water is pumped into the spray tower 1 through a pipeline two 5 by a water pump one 6 for continuous use, the alkaline residue with qualified pH value is discharged to a designated place through a residue discharge pipe 27, then water injection and alkaline residue particle input into the spray tower 1 are continuously carried out, and then the next round of alkaline residue treatment operation is carried out, the invention has scientific and reasonable structure, good effect of reducing the pH value of the caustic sludge, greatly reduces the cost of caustic sludge treatment and is suitable for popularization and use.
Those not described in detail in this specification are well within the skill of the art.
Although the present invention has been described with reference to the above embodiments, it should be understood that the scope of the present invention is not limited thereto, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention.
Claims (8)
1. The utility model provides an utilize useless device of coal fired power plant clean flue gas processing basicity danger which characterized in that: comprises a spray tower (1), a centrifugal dehydrator (3), an alkaline material grinding device (15), a spiral feeding device (17), a desulfurizing tower (19) and a chimney (20); the bottom of the spray tower (1) is of a conical structure, the middle part of the bottom of the spray tower (1) is fixedly connected with a first pipeline (2), the first pipeline (2) is fixedly connected with an electromagnetic valve (4), the bottom of the first pipeline (2) is fixedly connected with a centrifugal dehydrator (3), the centrifugal dehydrator (3) is fixedly connected with the bottom end of the outer wall of the left side of the spray tower (1) through a second pipeline (5), the second pipeline (5) is fixedly connected with a first water pump (6), the lower end of the outer wall of the left side of the spray tower (1) is fixedly connected with a motor (7), a power output end of the motor (7) is fixedly connected with a rotating shaft (8), the rotating shaft (8) penetrates through the inside of the spray tower (1), the rotating shaft (8) is rotatably connected with the right side wall of the inside of the spray tower (1), and blades (9) are fixedly connected with the, a third pipeline (10) is fixedly connected to the outer wall of the left side of the spray tower (1) and located above the motor (7), a second water pump (11) is fixedly connected to the third pipeline (10), the upper end of the third pipeline (10) penetrates into the spray tower (1), a water outlet pipe (12) is fixedly connected to the upper end of the third pipeline (10), a spray header (13) is fixedly connected to the bottom end of the water outlet pipe (12), and a demister (14) is fixedly connected to the top end of the interior of the spray tower (1); the bottom of alkaline material grinder (15) passes through pipeline four (16) and the feed inlet fixed connection of spiral material feeding unit (17), the discharge gate of spiral material feeding unit (17) passes through pipeline five (18) and spray column (1) fixed connection, desulfurizing tower (19) and chimney (20) pass through pipeline six (21) intercommunication, fixedly connected with pipeline seven (22) on pipeline six (21), the middle part fixed connection of pipeline one end and spray column (1) of pipeline six (21) are kept away from to pipeline seven (22), fixedly connected with fan (23) on pipeline seven (22), the left side fixedly connected with pipeline eight (24) of desulfurizing tower (19), the one end that desulfurizing tower (19) were kept away from to pipeline eight (24) and the top middle part fixed connection of spray column (1).
2. The device for treating alkaline hazardous waste by using clean flue gas of a coal-fired power plant according to claim 1, characterized in that: the blades (9) are arranged in a plurality, and the blades (9) are uniformly and fixedly connected to the rotating shaft (8).
3. The device for treating alkaline hazardous waste by using clean flue gas of a coal-fired power plant according to claim 1, characterized in that: the spray headers (13) are arranged in a plurality, and the spray headers (13) are uniformly and fixedly connected to the bottom ends of the water outlet pipes (12).
4. The device for treating alkaline hazardous waste by using clean flue gas of a coal-fired power plant according to claim 1, characterized in that: the seventh pipeline (22) penetrates through the spray tower (1) and enters the spray tower (1), and one end of the seventh pipeline (22) in the spray tower (1) is positioned below the spray header (13).
5. The device for treating alkaline hazardous waste by using clean flue gas of a coal-fired power plant according to claim 1, characterized in that: the water injection device is characterized in that a water injection pipe (25) is fixedly connected to the middle of the outer wall of the right side of the spray tower (1), and a valve is fixedly connected to the water injection pipe (25).
6. The device for treating alkaline hazardous waste by using clean flue gas of a coal-fired power plant according to claim 1, characterized in that: and the bottom end of the outer wall of the right side of the spray tower (1) is fixedly connected with a pH value detector (26).
7. The device for treating alkaline hazardous waste by using clean flue gas of a coal-fired power plant according to claim 1, characterized in that: the right side of the centrifugal dehydrator (3) is fixedly connected with a slag discharge pipe (27).
8. An operating method of the device for treating the alkaline hazardous waste by using the clean flue gas of the coal-fired power plant according to any one of claims 1 to 7, is characterized in that: the process is as follows: when the alkaline residue spraying device is used, firstly, alkaline residue is put into an alkaline material grinding device (15) for grinding, then the alkaline residue enters a spiral feeding device (17) through a pipeline four (16), the spiral feeding device (17) conveys ground alkaline residue particles into a spraying tower (1) through a pipeline five (18), a valve on a water injection pipe (25) is opened, water is injected into the spraying tower (1), after the alkaline residue particles and the water are injected into the spraying tower (1), a motor (7) is turned on, the motor (7) drives a rotating shaft (8) to rotate, the rotating shaft (8) drives a blade (9) to rotate, the rotating blade (9) stirs the alkaline residue particles and the water to form alkaline residue slurry, then a water pump two (11) is turned on, the alkaline residue slurry is conveyed into a water outlet pipe (12) by the water pump two (11), then the alkaline residue slurry is sprayed out from a spraying head (13), and finally the alkaline residue slurry is conveyed to the bottom of the spraying tower (1, then continuously stirring and extracting to form a circulation, opening a fan (23), extracting flue gas from a pipeline six (21) by the fan (23) through a pipeline seven (22), enabling the flue gas to enter a spray tower (1) from the pipeline seven (22), enabling the flue gas to fully contact with alkaline residue slurry sprayed by a spray header (13) above after entering the spray tower (1), neutralizing alkaline residue in the alkaline residue slurry by carbon dioxide and sulfur dioxide in the flue gas, reducing the pH value of the alkaline residue, enabling the flue gas to pass through a demister (14) after being subjected to neutralization reaction with the alkaline residue slurry, discharging the flue gas from a pipeline eight (24) out of the spray tower (1), and then entering a desulfurizing tower (19), wherein in the circulation, the alkaline residue slurry sprayed by the spray header (13) continuously performs neutralization reaction with the carbon dioxide and the sulfur dioxide in the flue gas, and continuously reduces the pH value of the alkaline residue in the alkaline residue slurry, detect the caustic sludge thick liquid through pH value detector (26), when the pH value of caustic sludge thick liquid reduces to the standard value, stop motor (7), the work of second (11) of water pump and fan (23), open solenoid valve (4), the caustic sludge thick liquid enters into in centrifugal dehydrator (3) from pipeline one (2), centrifugal dehydrator (3) carries out the sediment water separation with the caustic sludge thick liquid, water is taken out in spray column (1) through pipeline two (5) by water pump one (6), continue to use, qualified caustic sludge of pH value passes through slag discharge pipe (27) and discharges to appointed place, then continue to annotate water and input caustic sludge granule in spray column (1), then carry out the operation that next round of caustic sludge was handled.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113413754A (en) * | 2021-07-30 | 2021-09-21 | 浙江杭钻机械制造股份有限公司 | Carbon-fixing alkali-reducing reaction device and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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