CN110841467A - Method for removing SO in flue gas of coal-fired boiler by using white mud and red mud3Apparatus and method of - Google Patents
Method for removing SO in flue gas of coal-fired boiler by using white mud and red mud3Apparatus and method of Download PDFInfo
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- CN110841467A CN110841467A CN201911090464.5A CN201911090464A CN110841467A CN 110841467 A CN110841467 A CN 110841467A CN 201911090464 A CN201911090464 A CN 201911090464A CN 110841467 A CN110841467 A CN 110841467A
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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
- B01D53/81—Solid phase processes
- B01D53/83—Solid phase processes with moving reactants
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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
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
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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
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/10—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/183—Feeding or discharging devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention discloses a method for removing SO from flue gas of a coal-fired boiler by using white mud and red mud3The device comprises a pulverizer, wherein a discharge port of the pulverizer is fixedly connected with a hoister, a discharge port at the top end of the hoister passes through a feed inlet of a first pipeline fixedly connected with a feed bin, and a discharge port at the bottom end of the feed bin passes through a feed inlet of a second pipeline fixedly connected with a spiral feederThe discharge port of the spiral feeder is fixedly connected with the feed inlet of the ball mill through a pipeline III, the discharge port of the ball mill is fixedly connected with the feed inlet of the classifier through a pipeline IV, the bottom end of the classifier is fixedly connected with the feed inlet of the spiral material recycling machine through a pipeline V, and the discharge port of the spiral material recycling machine is fixedly connected with the feed inlet of the ball mill through a pipeline VI. The invention has scientific and reasonable structure, can prepare the white mud and the red mud into superfine powder, and can lead the white mud fine powder, the red mud fine powder and SO in the flue gas3Fully react to SO in the flue gas3Good removing effect, changes the white mud and the red mud into valuable, and greatly reduces the flue gas SO of the coal-fired boiler3The cost is removed, and the method is suitable for popularization and application.
Description
Technical Field
The invention relates to a method for removing SO from flue gas of a coal-fired boiler3In particular to a device for removing SO in flue gas of a coal-fired boiler by using white mud and red mud3The apparatus of (1).
Background
SO is contained in flue gas of coal-fired boiler of power plant3Need to be removed, and currently, the SO in the flue gas of coal burning boilers3The cost of removal is high, mainly more alkaline materials are consumed. The white mud is solid waste residue generated in the alkali recovery process of pulping and papermaking enterprises, and the main component of the white mud is CaCO3At present, most of white mud generated by pulping and papermaking enterprises in China is buried, on one hand, land resources are occupied, and on the other hand, the cost of the buried disposal is high; the red mud is the polluting waste residue discharged when the aluminum oxide is extracted in the aluminum production industry, generally 1 ton of aluminum oxide is produced on average, 1.0-2.0 tons of red mud are additionally produced, China is used as the 4 th alumina producing country in the world, the red mud discharged every year is up to millions of tons, a large amount of red mud is piled up and occupies the land, the ecological environment is damaged, the alkalinity of the red mud is high, and the attached alkali of the red mud and CaO and Al in the red mud are utilized2O3，Na2O and the like can effectively remove SO in the flue gas3White mud and red mud can be used as SO in coal-fired flue gas3The material can be removed, thereby changing waste into valuable and greatly reducing SO in the coal-fired flue gas3The invention provides a method for removing SO from flue gas of a coal-fired boiler by using white mud and red mud3The apparatus and method of (1).
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a method for removing SO from flue gas of a coal-fired boiler by using white mud and red mud3The device and the method solve the problem of SO in the existing coal-fired flue gas3The removal needs more alkaline materials and has higher cost.
The technical scheme adopted by the invention for solving the problems is as follows: method for removing SO in flue gas of coal-fired boiler by using white mud and red mud3The device comprises a pulverizer and is characterized in that a discharge port of the pulverizer is fixedly connected with an elevator, a discharge port at the top end of the elevator is fixedly connected with a feed inlet of a bin through a first pipeline, a discharge port at the bottom end of the bin is fixedly connected with a feed inlet of a spiral feeder through a second pipeline, a discharge port of the spiral feeder is fixedly connected with a feed inlet of a ball mill through a third pipeline, a discharge port of the ball mill is fixedly connected with a feed inlet of a classifier through a fourth pipeline, a bottom end of the classifier is fixedly connected with a feed inlet of a spiral material returning machine through a fifth pipeline, a discharge port of the spiral material returning machine is fixedly connected with a feed inlet of the ball mill through a sixth pipeline, a discharge port of the classifier is fixedly connected with a feed inlet of a cyclone collector through a seventh pipeline, and a discharge port, pulse collector's discharge gate department fixedly connected with fan, cyclone collector and pulse collector's bottom difference fixedly connected with pipeline nine and pipeline ten, the bottom difference fixedly connected with storage tank of pipeline nine and pipeline ten, the gas outlet of pipeline eleven fixed connection air pumps is passed through to one side of storage tank, the total pipeline of discharging pipe fixedly connected with is passed through to the bottom of storage tank, the bottom fixedly connected with branch pipeline of total pipeline, divide a plurality of spray tube of the even fixedly connected with in bottom of pipeline, it is a plurality of spray tube's a plurality of shower nozzles of bottom difference fixedly connected with of spray tube.
Further, the ball mill is an ultra-fine ball mill.
Furthermore, electromagnetic valves are respectively and fixedly installed on the fifth pipeline, the ninth pipeline and the tenth pipeline.
Further, the air pump is a high-pressure air pump.
Further, the branch pipeline is of an inverted T-shaped structure, and a plurality of branch pipelines are arranged.
Furthermore, a plurality of material spraying pipes at the bottom end of the branch pipeline are distributed in a step shape according to length.
The method for removing SO from the flue gas of the coal-fired boiler by using white mud and red mud3The working method of the device is characterized by comprising the following steps: the coal-fired boiler in the power plant is characterized in that a coal economizer, an SCR reactor, an air preheater, an electric dust remover, a desulfurizing tower and a chimney are sequentially arranged on a flue of a coal-fired boiler in a power plant, a material spraying pipe is respectively and fixedly arranged in the flue between the coal economizer and the SCR reactor, the flue between the SCR reactor and the air preheater, the flue between the air preheater and the electric dust remover and the flue between the electric dust remover and the desulfurizing tower, when in work, large white mud or red mud blocks are put into a crusher to be crushed, then white mud or red mud fragments are lifted by a lifter, the white mud or red mud enters a material bin through a first pipeline, the white mud or red mud fragments in the material bin enter a spiral feeding machine through a second pipeline, then enter a ball mill through a third pipeline, the ball mill grinds the white mud or red mud fragments into powder to form alkaline absorbent particles, and then the alkaline absorbent particles enter a classifier through a fourth pipeline, the grader grades the alkaline absorbent particles, the alkaline absorbent particles with the diameter larger than 10 mu m enter a pipeline five, enter a spiral material returning machine through an electromagnetic valve, return to the ball mill through a spiral material returning machine and a pipeline six, then continuously grinding the powder, feeding the alkaline absorbent particles with the diameter less than 10 μm in the classifier into a cyclone collector through a pipeline seven, drying and collecting the alkaline absorbent particles by the cyclone collector, then conveying the alkaline absorbent particles into a storage box through a pipeline nine by passing through an electromagnetic valve, in the cyclone collector, some ultra-fine alkaline absorbent particles can be absorbed by the pulse dust collector, the pulse dust collector collects the ultra-fine alkaline absorbent particles and then conveys the ultra-fine alkaline absorbent particles into the storage box through the electromagnetic valve by a pipeline, the fan provides power for collecting the alkaline absorbent particles for the device, and the alkaline absorbent particles in the storage box are arranged on the air pump.Under the action of the alkaline absorbent particles, the alkaline absorbent particles pass through the discharge pipe, the main pipeline, the branch pipelines and the spray pipe and are sprayed out of the spray head, and the alkaline absorbent particles sprayed out of the spray head are uniformly distributed in the flue and fully mixed with SO in flue gas in the flue3Reaction is carried out, and the reaction product is removed.
Compared with the prior art, the invention has the following advantages and effects:
1. dry method for removing SO by using white mud and red mud3The white mud and the red mud are used as consumed alkaline materials, so that waste is treated by waste, and the cost is greatly reduced.
2. Adopt superfine ball mill and grader to make the alkaline absorbent granule that white mud and red mud were prepared be less than 10 mu m, alkaline absorbent granule particle diameter is the smaller moreover, and is higher with sulfur trioxide's degree of contact to the reaction effect is better, and whole device can be opened promptly simultaneously, convenient operation.
3. Compared with the existing wet spraying technology, the preparation method does not increase the water content in the flue gas, so that the temperature of the flue gas is not reduced, and the corrosion of the tail part of the flue is avoided.
4. The grid type injection system can fully mix the fine white mud powder and the fine red mud powder with the flue gas in the flue SO as to treat SO in the flue gas3The removal is carried out very well.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an apparatus according to an embodiment of the present invention;
FIG. 2 is a partial structure diagram of a storage box according to an embodiment of the invention;
FIG. 3 is a schematic view of the structure of an apparatus according to an embodiment of the present invention applied to a flue system of a coal-fired boiler.
In the figure: 1-pulverizer, 2-elevator, 3-pipeline one, 4-bunker, 5-spiral feeder, 6-ball mill, 7-pipeline two, 8-pipeline three, 9-pipeline four, 10-classifier, 11-pipeline five, 12-spiral material-returning machine, 13-pipeline six, 14-electromagnetic valve, 15-pipeline seven, 16-cyclone collector, 17-pipeline eight, 18-pulse dust remover, 19-blower, 20-pipeline nine, 21-pipeline ten, 22-material storage box, 23-pipeline eleven, 24-air pump, 25-discharge pipe, 26-main pipeline, 27-branch pipeline, 28-spray pipe, 29-spray head, 30-coal-fired boiler, 31-flue, 32-economizer, 33-SCR reactor, 34-air preheater, 35-electric dust removal, 36-desulfurizing tower and 37-chimney.
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 to 3, it can be known that: in the embodiment, the white mud and the red mud are utilized to remove the SO in the flue gas of the coal-fired boiler3The device comprises a pulverizer 1, the pulverizer 1 can pulverize massive white mud and red mud, a discharge port of the pulverizer 1 is fixedly connected with an elevator 2, the elevator 2 can convey materials into a bin 4, a discharge port at the top end of the elevator 2 is fixedly connected with a feed port of the bin 4 through a first pipeline 3, a discharge port at the bottom end of the bin 4 is fixedly connected with a feed port of a spiral feeder 5 through a second pipeline 7, the spiral feeder 5 can convey materials into a ball mill 6, a discharge port of the spiral feeder 5 is fixedly connected with a feed port of the ball mill 6 through a third pipeline 8, the ball mill 6 can grind the materials into powder, a discharge port of the ball mill 6 is fixedly connected with a feed port of a classifier 10 through a fourth pipeline 9, the classifier 10 can classify the powder of the white mud and the powder of the red mud in a coarse and fine manner, a feed port of a spiral material returning machine 12 is fixedly connected with the bottom end of the classifier 10 through a fifth pipeline 11, the spiral, the discharge port of the spiral material returning machine 12 is fixedly connected with the feed port of the ball mill 6 through a pipeline six 13, and the discharge port of the grader 10 is fixedly connected with the cyclone collector 16 through a pipeline seven 15The cyclone collector 16 can dry and primarily collect ultrafine powder of white mud and red mud, a discharge hole of the cyclone collector 16 is fixedly connected with a feed hole of the pulse dust collector 18 through a pipeline eight 17, the pulse dust collector 18 can completely collect ultrafine powder of white mud and red mud, a discharge hole of the pulse dust collector 18 is fixedly connected with a fan 19, the fan 19 can provide power for collecting powder for the pulse dust collector 18, the bottom ends of the cyclone collector 16 and the pulse dust collector 18 are respectively fixedly connected with a pipeline nine 20 and a pipeline ten 21, the bottom ends of the pipeline nine 20 and the pipeline ten 21 are respectively fixedly connected with a storage box 22, the storage box 22 can store ultrafine powder of white mud and red mud, one side of the storage box 22 is fixedly connected with an air outlet of a pipeline eleven 23, the air pump 24 can provide power for spraying, the bottom end of the storage box 22 is fixedly connected with a main pipeline 26 through a discharge pipe 25, the bottom end of the main pipeline 26 is fixedly connected with a branch pipeline 27, the bottom end of the branch pipeline 27 is uniformly and fixedly connected with a plurality of spraying pipes 28, the bottom ends of the spraying pipes 28 are respectively fixedly connected with a plurality of spray heads 29, and the spray heads 29 are convenient for spraying materials.
The ball mill 6 is an ultrafine ball mill, which is convenient for grinding the white mud and red mud powder into particles with the diameter less than 10 mu m; the pipeline five 11, the pipeline nine 20 and the pipeline ten 21 are respectively and fixedly provided with an electromagnetic valve 14, so that the discharging is conveniently controlled; the air pump 24 is a high-pressure air pump, so that the powder injection effect is good; the branch pipelines 27 are of an inverted T-shaped structure, and are provided with a plurality of pipelines, so that the material can be conveniently divided into a plurality of groups for spraying; the plurality of material spraying pipes 28 at the bottom end of the branch pipe 27 are distributed in a step shape according to the length, so that the white mud and the red mud powder can be uniformly sprayed into the flue 31.
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 principle and the advantages of the invention are as follows: an economizer 32, an SCR reactor 33, an air preheater 34, an electric dust collector 35, a desulfurizing tower 36 and a chimney 37 are sequentially arranged on a flue 31 of a coal-fired boiler 30 in a power plant, and a material injection pipe 28 is respectively and fixedly arranged in the flue 31 between the economizer 32 and the SCR reactor 33, the flue 31 between the SCR reactor 33 and the air preheater 34, the air preheater 34 and an electric heaterIn the flue 31 between the dust removal 35 and the flue 31 between the electric dust removal 35 and the desulfurizing tower 36, during operation, large white mud or red mud is put into the pulverizer 1 for pulverization, then fragments of the white mud or red mud are lifted by the lifter 2, the white mud or red mud enters the bin 4 through the pipeline I3, the fragments of the white mud or red mud in the bin 4 enter the screw feeder 5 through the pipeline II 7, then enter the ball mill 6 through the pipeline III 8, the fragments of the white mud or red mud are ground into powder by the ball mill 6 to become alkaline absorbent particles, then the alkaline absorbent particles enter the classifier 10 through the pipeline IV 9, the classifier 10 classifies the alkaline absorbent particles, the alkaline absorbent particles with the diameter larger than 10 μm enter the pipeline V11, enter the screw material returning machine 12 through the electromagnetic valve 14, and then return to the ball mill 6 through the screw material returning machine 12 and the pipeline VI 13, then the alkaline absorbent particles with the diameter less than 10 microns in the classifier 10 enter a cyclone collector 16 through a pipeline seven 15, the cyclone collector 16 carries out drying collection on the alkaline absorbent particles, then the alkaline absorbent particles are conveyed into a storage box 22 through a pipeline nine 20 and a solenoid valve 14, in the cyclone collector 16, some extra-fine alkaline absorbent particles are absorbed by a pulse dust collector 18, the pulse dust collector 18 collects the extra-fine alkaline absorbent particles and conveys the extra-fine alkaline absorbent particles into the storage box 22 through a pipeline ten 21 and the solenoid valve 14, a fan 19 provides power for collecting the alkaline absorbent particles for the device, the alkaline absorbent particles in the storage box 22 pass through a discharge pipe 25, a main pipeline 26, a branch pipeline 27 and a spray pipe 28 under the action of an air pump 24 and then are sprayed out from a spray nozzle 29, the alkaline absorbent particles sprayed out of the spray nozzle 29 are uniformly distributed in a flue 31, and fully contacts with SO in flue gas in the flue 313Reaction is carried out, and the reaction product is removed. The invention has scientific and reasonable structure, can prepare the white mud and the red mud into superfine powder, and can lead the white mud fine powder, the red mud fine powder and SO in the flue gas3Fully react to SO in the flue gas3Good removing effect, changes the white mud and the red mud into valuable, and greatly reduces the flue gas SO of the coal-fired boiler 303The cost is removed, and the method is suitable for popularization and application.
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 (7)
1. Method for removing SO in flue gas of coal-fired boiler by using white mud and red mud3The device comprises a pulverizer (1) and is characterized in that a discharge port of the pulverizer (1) is fixedly connected with an elevator (2), a discharge port at the top end of the elevator (2) passes through a feed inlet of a first pipeline (3) fixedly connected with a bin (4), a discharge port at the bottom end of the bin (4) passes through a feed inlet of a second pipeline (7) fixedly connected with a spiral feeder (5), a discharge port of the spiral feeder (5) passes through a feed inlet of a third pipeline (8) fixedly connected with a ball mill (6), a discharge port of the ball mill (6) passes through a feed inlet of a fourth pipeline (9) fixedly connected with a classifier (10), a bottom end of the classifier (10) passes through a feed inlet of a fifth pipeline (11) fixedly connected with a spiral material returning machine (12), and a discharge port of the spiral material returning machine (12) passes through a feed inlet of a sixth pipeline (13) fixedly connected with a ball mill (6), the discharge port of the classifier (10) is fixedly connected with the feed inlet of a cyclone collector (16) through a seventh pipeline (15), the discharge port of the cyclone collector (16) is fixedly connected with the feed inlet of a pulse dust collector (18) through an eighth pipeline (17), the discharge port of the pulse dust collector (18) is fixedly connected with a fan (19), the bottom ends of the cyclone collector (16) and the pulse dust collector (18) are respectively fixedly connected with a ninth pipeline (20) and a tenth pipeline (21), the bottom ends of the ninth pipeline (20) and the tenth pipeline (21) are respectively fixedly connected with a storage box (22), one side of the storage box (22) is fixedly connected with the gas outlet of a gas pump (24) through an eleventh pipeline (23), the bottom end of the storage box (22) is fixedly connected with a main pipeline (26) through a discharge pipe (25), and the bottom end of the main pipeline (26) is fixedly connected with a branch pipeline (27), the above-mentionedThe bottom end of the branch pipeline (27) is uniformly and fixedly connected with a plurality of spraying pipes (28), and the bottom ends of the spraying pipes (28) are respectively and fixedly connected with a plurality of spray heads (29).
2. The method for removing SO from flue gas of coal-fired boiler by using white mud and red mud according to claim 13The device is characterized in that the ball mill (6) is an ultra-fine ball mill.
3. The method for removing SO from flue gas of coal-fired boiler by using white mud and red mud according to claim 13The device is characterized in that the pipeline five (11), the pipeline nine (20) and the pipeline ten (21) are respectively and fixedly provided with an electromagnetic valve (14).
4. The method for removing SO from flue gas of coal-fired boiler by using white mud and red mud according to claim 13The device is characterized in that the air pump (24) is a high-pressure air pump.
5. The method for removing SO from flue gas of coal-fired boiler by using white mud and red mud according to claim 13The device is characterized in that the branch pipeline (27) is of an inverted T-shaped structure, and a plurality of branch pipelines (27) are arranged.
6. The method for removing SO from flue gas of coal-fired boiler by using white mud and red mud according to claim 13The device is characterized in that a plurality of material spraying pipes (28) at the bottom ends of the branch pipes (27) are distributed in a step shape according to the length.
7. The method for removing SO from flue gas of coal-fired boiler by using white mud and red mud according to any one of claims 1 to 63The working method of the device is characterized by comprising the following steps: an economizer (32), an SCR reactor (33), an air preheater (34), an electric dust remover (35), a desulfurizing tower (36) and a chimney (37) are sequentially arranged on a flue (31) of a coal fired boiler (30) in a power plant, and a material injection pipe (28) is respectively and fixedly installed on the economizer (32) and the SCR reactor(33) In the flue (31) between, in the flue (31) between the SCR reactor (33) and the air preheater (34), in the flue (31) between the air preheater (34) and the electric dust remover (35), and in the flue (31) between the electric dust remover (35) and the desulfurizing tower (36), when in work, large white mud or red mud is put into the pulverizer (1) for pulverization, then white mud or red mud fragments are lifted by the lifter (2), the white mud or red mud enters into the bin (4) through the pipeline I (3), white mud or red mud fragments in the bin (4) enter into the screw feeder (5) through the pipeline II (7), then enter into the ball mill (6) through the pipeline III (8), the ball mill (6) grinds the white mud or red mud fragments into powder to become alkaline absorbent particles, and then the alkaline absorbent particles enter into the classifier (10) through the pipeline IV (9), the classifier (10) classifies alkaline absorbent particles, the alkaline absorbent particles with the diameter larger than 10 mu m enter a pipeline five (11), enter a spiral material returning machine (12) through an electromagnetic valve (14), return to a ball mill (6) through the spiral material returning machine (12) and a pipeline six (13), and are continuously ground into powder, the alkaline absorbent particles with the diameter smaller than 10 mu m in the classifier (10) enter a cyclone collector (16) through a pipeline seven (15), the cyclone collector (16) dries and collects the alkaline absorbent particles, then the alkaline absorbent particles pass through the electromagnetic valve (14) through a pipeline nine (20) and are conveyed into a storage box (22), some ultrafine alkaline absorbent particles are absorbed by a pulse dust collector (18) in the cyclone collector (16), and the pulse dust collector (18) conveys the ultrafine alkaline absorbent particles into the storage box (22) through the electromagnetic valve (14) through a pipeline ten (21) after collecting the ultrafine alkaline absorbent particles The fan (19) provides power for collecting alkaline absorbent particles for the device, the alkaline absorbent particles in the storage box (22) pass through the discharge pipe (25), the main pipeline (26), the branch pipelines (27) and the spraying pipe (28) under the action of the air pump (24) and are then sprayed out of the spray head (29), the alkaline absorbent particles sprayed out of the spray head (29) are uniformly distributed in the flue (31) and fully matched with SO in flue gas in the flue (31)3Reaction is carried out, and the reaction product is removed.
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| CN111468510A (en) * | 2020-04-20 | 2020-07-31 | 华电电力科学研究院有限公司 | Device and method for treating alkaline hazardous waste by using clean flue gas of coal-fired power plant |
| CN113230875A (en) * | 2021-03-04 | 2021-08-10 | 昆明理工大学 | Bayer process red mud dry method for removing SO in copper smelting high-temperature flue gas3Method and apparatus |
| CN113368673A (en) * | 2021-05-14 | 2021-09-10 | 华电电力科学研究院有限公司 | System and method for removing sulfur trioxide in flue gas by dry method |
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