CN212597855U

CN212597855U - Utilize useless device of coal fired power plant clean flue gas processing basicity danger

Info

Publication number: CN212597855U
Application number: CN202020587597.5U
Authority: CN
Inventors: 薛方明
Original assignee: Huadian Electric Power Research Institute Co Ltd
Current assignee: Huadian Electric Power Research Institute Co Ltd
Priority date: 2020-04-20
Filing date: 2020-04-20
Publication date: 2021-02-26
Anticipated expiration: 2030-04-20

Abstract

The utility model discloses a device 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; 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 utility model has the advantages of being scientific and reasonable in structure, good to the treatment effect of alkali dregs, the cost of manufacture is low, is fit for using widely.

Description

Utilize useless device of coal fired power plant clean flue gas processing basicity danger

Technical Field

The utility model relates to an alkali slag processing apparatus specifically relates to an utilize clean flue gas of coal fired power plant to handle useless device of basicity danger.

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.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide an utilize coal fired power plant clean flue gas to handle useless device of basicity danger, can combine together carbon dioxide and sulfur dioxide's processing in the coal fired power plant flue gas and the processing of alkali sediment, solved the problem that the alkali sediment was handled.

The utility model provides a technical scheme that above-mentioned problem adopted is: 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.

Compared with the prior art, the utility model, have following advantage and effect: 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 utility model has the advantages of being scientific and reasonable in structure, good to the treatment effect of alkali dregs, the cost of manufacture is low, is fit for using widely.

Drawings

FIG. 1 is the embodiment of the utility model provides an utilize clean flue gas of coal fired power plant to handle useless device's of alkaline danger structure sketch map.

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 by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description of the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not 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 can enter the desulfurizing tower 19 from other equipment, and then enter 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 from 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 head 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 flue gas passes through the demister 14, reducing the fog drop amount carried by the flue gas, then discharging the flue gas out of the spray tower 1 through a pipeline eight 24, then entering the desulfurizing tower 19, circulating in this way, enabling the caustic sludge slurry sprayed out of the spray header 13 to continuously react with carbon dioxide and sulfur dioxide in the flue gas in a neutralization way, continuously reducing the pH value of the caustic sludge in the caustic sludge slurry, detecting the caustic sludge slurry through a pH value detector 26, stopping the work of the motor 7, the water pump two 11 and the fan 23 when the pH value of the caustic sludge slurry is reduced to a standard value, opening the electromagnetic valve 4, enabling the caustic sludge slurry to enter the centrifugal dehydrator 3 from the pipeline one 2, enabling the centrifugal dehydrator 3 to separate the caustic sludge slurry from water, pumping the water into the spray tower 1 through the pipeline two 5 by the water pump one 6 for continuous use, discharging the caustic sludge with qualified pH value to a designated place through a slag discharge pipe 27, then continuing injecting water and inputting caustic sludge particles into the spray tower 1, and then carrying out the next round of caustic sludge treatment, the utility model has the advantages of being scientific and reasonable in structure, effectual to the reduction of alkaline residue pH value, greatly reduced the cost that alkaline residue was handled, be fit for using widely.

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 not be construed as being limited to the scope of the present invention, and any modifications and alterations made by those skilled in the art without departing from the spirit and scope of the present invention should fall within the scope of the present invention.

Claims

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).