CN109806754B - Desulfurizing absorption tower device - Google Patents
Desulfurizing absorption tower device Download PDFInfo
- Publication number
- CN109806754B CN109806754B CN201711165378.7A CN201711165378A CN109806754B CN 109806754 B CN109806754 B CN 109806754B CN 201711165378 A CN201711165378 A CN 201711165378A CN 109806754 B CN109806754 B CN 109806754B
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- Prior art keywords
- absorption tower
- desulfurization absorption
- demister
- water
- desulfurization
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 102
- 230000003009 desulfurizing effect Effects 0.000 title description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 133
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 116
- 230000023556 desulfurization Effects 0.000 claims abstract description 116
- 238000011010 flushing procedure Methods 0.000 claims abstract description 57
- 239000002002 slurry Substances 0.000 claims abstract description 34
- 238000005406 washing Methods 0.000 claims abstract description 33
- 239000007921 spray Substances 0.000 claims abstract description 28
- 239000000779 smoke Substances 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000004064 recycling Methods 0.000 claims description 15
- 239000002351 wastewater Substances 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 11
- 239000003546 flue gas Substances 0.000 abstract description 11
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000006096 absorbing agent Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
The invention provides a desulfurization absorption tower device, which comprises a desulfurization absorption tower, a demister flushing spray layer and a slurry spray layer, wherein the demister flushing spray layer and the slurry spray layer are arranged in the desulfurization absorption tower; the demister washing water collecting device is arranged in the desulfurization absorption tower and located between the demister washing spray layer and the slurry spray layer, and is provided with smoke through holes for flue gas to pass through. According to the invention, the demister flushing water in the desulfurization absorption tower is collected through the demister flushing water collecting device, so that the problem that the liquid level of slurry in the desulfurization absorption tower is raised due to the demister flushing water is solved, the slurry discharge times of the desulfurization absorption tower are reduced, and the desulfurization efficiency is further improved.
Description
Technical Field
The invention relates to the technical field of wet desulfurization of flue gas of coal-fired power plants, in particular to a desulfurization absorption tower device.
Background
Most of ChinaThe flue gas desulfurization of the coal-fired power plant adopts a wet desulfurization process, the wet desulfurization process needs to wash a demister, the demister wash water occupies 40% of the whole process water, and part of water enters a desulfurization absorption tower and can cause that SO in the flue gas is oxidized in the desulfurization absorption tower 2 The level of the limestone slurry rises. Especially, the country encourages coal-fired power plants to carry out ultralow emission reconstruction, and partial areas adopt double towers and double circulation in wet desulfurization due to higher sulfur content in the coal, so that the condition that the liquid level of slurry in the tower rises after the demister is washed by the secondary absorption tower is more likely to occur.
At present, a stack wet smoke plume is being treated in an individual power plant, wherein the main process is that the smoke is cooled when entering a desulfurization absorption tower, and is heated after exiting the desulfurization absorption tower, the process leads to the reduction of the evaporation carrying water of the smoke of the desulfurization absorption tower, and the liquid level of the slurry in the desulfurization tower is also increased after a demister is washed, so that frequent slurry discharge is brought.
In summary, how to reduce the number of times of slurry discharge in the desulfurization absorption tower is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a desulfurization absorber device for reducing the number of times of slurry discharge from the desulfurization absorber.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a desulfurization absorption tower device comprises a desulfurization absorption tower, a demister flushing spray layer and a slurry spray layer, wherein the demister flushing spray layer and the slurry spray layer are arranged in the desulfurization absorption tower; further comprises:
the demister washing water collecting device is used for collecting demister washing water sprayed by the demister washing spray layer, is arranged in the desulfurization absorption tower and is located between the demister washing spray layer and the slurry spray layer, and is provided with smoke through holes for flue gas to pass through.
Preferably, in the desulfurization absorbing tower apparatus, the demister washing water collecting apparatus includes:
a flushing water collecting tank which is connected with the inner wall of the desulfurization absorption tower in a sealing way, wherein a drainage hole communicated with the flushing water collecting tank is arranged on the side wall of the desulfurization absorption tower;
the plurality of hollow convex columns are arranged on the bottom surface of the flushing water collecting tank, and the smoke through holes are arranged on the side surfaces of the hollow convex columns.
Preferably, in the desulfurization absorption tower device, the hollow protruding columns are uniformly distributed on the bottom surface of the flushing water collecting tank and are square columns, and the smoke through holes are formed in the top of the side surfaces of the square columns.
Preferably, in the desulfurization absorption tower apparatus, the bottom surface of the flushing water collecting tank has an inclination angle of 3 ° to 8 ° with respect to the horizontal plane, and the drain hole is provided on a side of the desulfurization absorption tower near the lower end of the bottom surface.
Preferably, the desulfurization absorption tower device further comprises a water purifying device for purifying the collected demister washing water, and the water purifying device is located outside the desulfurization absorption tower and connected with the drain hole.
Preferably, in the desulfurization absorbing tower apparatus, the water purifying apparatus includes:
the waste water storage tank is connected with the water discharge hole through a collecting pipeline;
a clean water tank;
and the water treatment mechanism is connected between the wastewater storage tank and the clean water tank.
Preferably, in the desulfurization absorption tower device, the wastewater storage tank is provided with a first liquid level meter, a first electromagnetic flowmeter is arranged in the collecting pipeline, and a second liquid level meter is arranged in the clean water tank.
Preferably, in the desulfurization absorption tower device, the desulfurization absorption tower device further comprises a recycling device for re-inputting purified demister flushing water into the demister flushing water pipe, wherein the input end of the recycling device is connected with the output end of the water purifying device, and the output end of the recycling device is connected with the input end of the demister flushing water pipe through the recycling water pipe.
Preferably, in the desulfurization absorption tower device, a second electromagnetic flowmeter is disposed in the demister flushing water pipe.
Preferably, in the desulfurization absorption tower device, the desulfurization absorption tower comprises a first-stage desulfurization absorption tower and a second-stage desulfurization absorption tower, the demister washing water collecting device is arranged in the first-stage desulfurization absorption tower, and a slurry outlet of the second-stage desulfurization absorption tower is connected with a slurry inlet of the first-stage desulfurization absorption tower through a slurry recycling pipe.
According to the technical scheme, the desulfurization absorption tower device comprises a desulfurization absorption tower, and a demister flushing spray layer and a slurry spray layer which are arranged in the desulfurization absorption tower; the demister washing water collecting device is arranged in the desulfurization absorption tower and located between the demister washing spray layer and the slurry spray layer, and is provided with smoke through holes for flue gas to pass through.
The demister flushing water collecting device is used for collecting demister flushing water in the desulfurization absorption tower, so that the problem that the liquid level of slurry in the desulfurization absorption tower is raised due to the demister flushing water is solved, and the slurry discharge times of the desulfurization absorption tower are reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a desulfurizing absorption tower apparatus according to an embodiment of the present invention;
fig. 2 is a top view of a demister wash water collecting device provided by an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a desulfurization absorption tower device, which reduces the pulp discharge times of the desulfurization absorption tower.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-2, a desulfurization absorption tower device provided by an embodiment of the present invention includes a desulfurization absorption tower 1, a demister flushing spray layer 4 and a slurry spray layer 2 disposed in the desulfurization absorption tower 1; still including being used for collecting the defroster wash water collection device that the defroster washed down that the layer 4 was sprayed is washed to the defroster, defroster wash water collection device sets up in desulfurization absorption tower 1 and is located the defroster and wash between spray layer 4 and thick liquid spray layer 2, and defroster wash water collection device is provided with the logical smoke vent 31 that supplies the flue gas to pass through.
The demister flushing water collecting device is used for collecting demister flushing water in the desulfurization absorption tower 1, so that the problem that the demister flushing water brings about rising of the slurry liquid level in the desulfurization absorption tower 1 is solved, and the slurry discharge times of the desulfurization absorption tower 1 are reduced.
In a specific embodiment of the invention, the demister flushing water collecting device comprises a flushing water collecting tank 5 which is hermetically connected with the inner wall of the desulfurization absorption tower 1, and a drainage hole 11 which is communicated with the flushing water collecting tank 5 is arranged on the side wall of the desulfurization absorption tower 1; a plurality of hollow bosses 3 provided on the bottom surface of the washing water collecting tank 5, and smoke passing holes 31 provided on the side surfaces of the hollow bosses 3. Specifically, the above-mentioned wash water collecting tank 5 is welded with the inner wall of the desulfurization absorption tower 1 to achieve sealing connection, thereby ensuring that the demister wash water is completely collected.
In the embodiment, the demister flushing water sprayed by the demister flushing spray layer 4 is collected by the flushing water collecting tank 5 and discharged from the side wall of the desulfurization absorption tower 1 through the water discharge holes 11, and meanwhile, the flue gas passes through the flue gas through holes 31 on the hollow convex columns 3; the structure is simple, and the demister flushing water can be well prevented from entering the smoke vent 31, so that the working reliability is improved. The present invention may be configured so that the demister washing water collected in the washing water collecting tank 5 is re-fed to the demister washing spray layer 4 by a recovery pump without providing the drain hole 11.
It can be understood that the above-mentioned demister washing water collecting device may also have other structures, such as a collecting tray with an opening, and a blocking plate is disposed above the opening, so that a gap is formed between the blocking plate and the collecting tray at the opening as the smoke through hole 31, so as to achieve the same effect of collecting the demister washing water and passing the smoke.
As shown in fig. 1-2, the hollow protruding columns 3 are uniformly distributed on the bottom surface of the flushing water collecting tank 5, so that the intervals between the adjacent hollow protruding columns 3 are the same, the flue gas flows in the desulfurization absorption tower 1 relatively uniformly, and the consistency of desulfurization effect is ensured. Of course, the hollow lugs 3 may also be unevenly distributed over the bottom surface of the flushing water collection tank 5.
In this embodiment, the hollow protruding columns 3 are square columns, that is, the cross section of the hollow protruding columns 3 is square, and the smoke through holes 31 are formed at the top of the side surfaces of the square columns. Specifically, the height of the hollow convex column 3 is 800mm, the side length is 300mm, the smoke through holes 31 are formed in four sides of the square column and have the width of 200mm, so that smoke can pass through the smoke through holes, and the distance between the adjacent hollow convex columns 3 is 400mm. Alternatively, the hollow boss 3 may have other shapes, such as a cylindrical shape.
Preferably, the bottom surface of the washing water collecting tank 5 has an inclination angle of 3 to 8 with respect to the horizontal plane, and the drain hole 11 is provided at a side of the desulfurization absorbing tower 1 near the lower end of the bottom surface. Specifically, the bottom surface of the flushing water collecting tank 5 is inclined at an angle of 5 ° relative to the horizontal plane, and the demister flushing water convenient to collect is discharged from the water drain hole 11 to the outside of the desulfurization absorption tower 1 under the action of gravity. Of course, the bottom surface of the washing water collecting tank 5 may be horizontally disposed so that the drain hole 11 is flush with the bottom surface of the washing water collecting tank 5.
In a further technical scheme, the desulfurization absorption tower device further comprises a water purifying device 7 for purifying the collected demister washing water, and the water purifying device 7 is positioned outside the desulfurization absorption tower 1 and connected with the drain hole 11. The collected demister flushing water is purified through the water purifying device 7, so that the demister flushing water can be conveniently recycled. The present invention may not include the water purifying device 7.
In one embodiment of the invention, the water purifying device 7 comprises a waste water storage tank connected with the drain hole 11 through the collecting pipeline 6; a clean water tank; and the water treatment mechanism is connected between the wastewater storage tank and the clean water tank. The demister flushing water collected by the flushing water collecting tank 5 flows through the collecting pipeline 6 outside the desulfurization absorption tower 1 through the drain hole 11, is stored into a wastewater storage tank, is treated by a water treatment mechanism, enters into a clean water tank, and can be recycled. The water purifying device 7 may include only a water treatment mechanism and a clean water tank.
In order to be convenient for know the flow and the collection volume of defroster sparge water, it is preferable that the waste water storage tank is provided with first level gauge, is provided with first electromagnetic flowmeter in the collection pipeline 6, is provided with the second level gauge in the clean water tank.
The desulfurization absorption tower device further comprises a recycling device 8 for inputting purified demister flushing water to the demister flushing water pipe again, wherein the input end of the recycling device 8 is connected with the output end of the water purifying device 7, and the output end of the recycling device 8 is connected with the input end of the demister flushing water pipe through the recycling water pipe. The purified demister flushing water is re-input into the demister flushing water pipe through the recycling device 8, the demister flushing wastewater in the desulfurization absorption tower device is collected and treated for recycling, the multiplexing rate of the water is improved, and the water supplement entering the desulfurization absorption tower 1 is reduced, so that the water consumption and water supplement balance of a desulfurization system are realized, the water consumption is saved, the stable and reliable operation of the system is ensured, the excessive high liquid level in the desulfurization absorption tower 1 can be avoided, and the implementation of ultralow emission of flue gas and subsequent wet smoke plume treatment and transformation is facilitated. Alternatively, the invention can also be applied to other occasions by other waste water recycling devices.
In order to obtain the water supplementing amount of the demister air-filled water pipe conveniently, preferably, a second electromagnetic flowmeter is arranged in the demister flushing water pipe. Of course, the demister flushing water pipe is not required to be provided with a second electromagnetic flowmeter.
In a specific embodiment of the invention, the desulfurization absorption tower 1 comprises a primary desulfurization absorption tower and a secondary desulfurization absorption tower, wherein a demister flushing water collecting device is arranged in the primary desulfurization absorption tower, and a slurry outlet of the secondary desulfurization absorption tower is connected with a slurry inlet of the primary desulfurization absorption tower through a slurry recycling pipe. In the embodiment, the desulfurization system adopts double towers and double circulation, and demister washing water in the primary desulfurization absorption tower is collected through a demister washing water collecting device; and meanwhile, the two absorption towers of the desulfurization double-tower double-circulation are connected by the slurry recycling pipe, so that the evaporation capacity of the first-stage desulfurization absorption tower is large, more water is needed to be supplemented, and excessive slurry in the second-stage desulfurization absorption tower is conveyed to the first-stage desulfurization absorption tower, thereby achieving the balance of water and drainage of a desulfurization system, reducing the water supplementing capacity and saving water. Of course, the demister flushing water collecting device can be arranged in the secondary desulfurization absorption tower, or the demister flushing water collecting device is arranged in both the primary desulfurization absorption tower and the secondary desulfurization absorption tower.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A desulfurization absorption tower device comprises a desulfurization absorption tower (1), a demister flushing spray layer (4) and a slurry spray layer (2) which are arranged in the desulfurization absorption tower (1); characterized by further comprising:
the demister washing water collecting device is used for collecting demister washing water sprayed by the demister washing spray layer (4), is arranged in the desulfurization absorption tower (1) and is positioned between the demister washing spray layer (4) and the slurry spray layer (2), and is provided with smoke through holes (31) for passing smoke;
the demister washing water collecting device includes:
a flushing water collecting tank (5) which is connected with the inner wall of the desulfurization absorption tower (1) in a sealing way, and a drainage hole (11) which is communicated with the flushing water collecting tank (5) is arranged on the side wall of the desulfurization absorption tower (1);
a plurality of hollow bosses (3) arranged on the bottom surface of the flushing water collecting tank (5), wherein the smoke through holes (31) are arranged on the side surfaces of the hollow bosses (3);
the hollow convex columns (3) are uniformly distributed on the bottom surface of the flushing water collecting tank (5) and are square columns, and the smoke through holes (31) are formed in the tops of the side surfaces of the square columns.
2. The desulfurization absorbing tower apparatus according to claim 1, characterized in that the bottom surface of the flushing water collecting tank (5) has an inclination angle of 3 ° -8 ° with respect to the horizontal plane, and the drain hole (11) is provided on the side of the desulfurization absorbing tower (1) near the lower end of the bottom surface.
3. The desulfurization absorption tower apparatus according to claim 1, further comprising a water purifying device (7) for purifying the collected demister washing water, wherein the water purifying device (7) is located outside the desulfurization absorption tower (1) and connected to the drain hole (11).
4. A desulfurization absorption tower apparatus according to claim 3, wherein said water purifying apparatus (7) comprises:
a waste water storage tank connected with the drain hole (11) through a collecting pipeline (6);
a clean water tank;
and the water treatment mechanism is connected between the wastewater storage tank and the clean water tank.
5. The desulfurization absorption tower device according to claim 4, wherein the wastewater storage tank is provided with a first liquid level meter, a first electromagnetic flowmeter is arranged in the collection pipeline (6), and a second liquid level meter is arranged in the clean water tank.
6. A desulfurization absorption tower apparatus according to claim 3, further comprising a reusing device (8) for re-inputting the purified demister washing water to a demister washing water pipe, wherein an input end of the reusing device (8) is connected to an output end of the water purifying device (7), and an output end of the reusing device (8) is connected to an input end of the demister washing water pipe through a reusing water pipe.
7. The desulfurization absorption tower apparatus according to claim 6, wherein a second electromagnetic flowmeter is provided in the demister flushing water pipe.
8. The desulfurization absorption tower apparatus according to any one of claims 1 to 7, wherein the desulfurization absorption tower (1) comprises a primary desulfurization absorption tower and a secondary desulfurization absorption tower, the demister washing water collecting device is provided in the primary desulfurization absorption tower, and a slurry outlet of the secondary desulfurization absorption tower is connected with a slurry inlet of the primary desulfurization absorption tower through a slurry recycling pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711165378.7A CN109806754B (en) | 2017-11-21 | 2017-11-21 | Desulfurizing absorption tower device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711165378.7A CN109806754B (en) | 2017-11-21 | 2017-11-21 | Desulfurizing absorption tower device |
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| CN109806754A CN109806754A (en) | 2019-05-28 |
| CN109806754B true CN109806754B (en) | 2024-02-09 |
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| CN201711165378.7A Active CN109806754B (en) | 2017-11-21 | 2017-11-21 | Desulfurizing absorption tower device |
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| CN114870609A (en) * | 2022-04-21 | 2022-08-09 | 新疆大学 | Device for removing SO2 in flue gas by using aeration method |
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| WO2014156985A1 (en) * | 2013-03-26 | 2014-10-02 | バブコック日立株式会社 | Seawater flue-gas desulfurization device and method for operating same |
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