CN109351168B - Flue gas desulfurization device - Google Patents
Flue gas desulfurization device Download PDFInfo
- Publication number
- CN109351168B CN109351168B CN201811597067.2A CN201811597067A CN109351168B CN 109351168 B CN109351168 B CN 109351168B CN 201811597067 A CN201811597067 A CN 201811597067A CN 109351168 B CN109351168 B CN 109351168B
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- flow
- screen plate
- alkali
- tower body
- nozzle
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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
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention provides a flue gas desulfurization device, in particular to the field of desulfurization devices, which comprises a tower body, wherein the lower end and the upper end of the tower body are respectively provided with an exhaust gas inlet and an exhaust gas outlet, and a demister cleaning spray device, a demister, a first nozzle distributor, a first flow-through sieve plate and a second flow-through sieve plate are sequentially arranged in the tower body from top to bottom; the first nozzle distributor comprises an alkali inlet pipeline, the alkali inlet pipeline penetrates through the side wall of the tower body, an alkali outlet pipeline is arranged in the alkali inlet pipeline positioned in the tower, and two ends of the alkali outlet pipeline are closed; the middle part of the alkali outlet pipeline is connected with the alkali inlet pipeline; the side wall of the alkali outlet pipeline is provided with a plurality of alkali outlet nozzles; the first flow-through screen plate is formed by arranging a plurality of through holes on a circular plate, and the first flow-through screen plate and the second flow-through screen plate have the same structure. The invention has the advantages of good desulfurization effect and high efficiency.
Description
Technical Field
The invention belongs to the field of desulfurization devices, and particularly relates to a flue gas desulfurization device.
Background
The traditional wet desulfurization process adopts a tower spraying process in the tower body, namely, alkali liquor is conveyed into the tower body through a high-pressure water pump, liquid drops are contacted with sulfur dioxide in flue gas through spraying to achieve the purpose of desulfurization, and the flue gas discharged from the tower top is a general demister, so that the coverage degree of the alkali liquor is very high and no spraying dead zone is needed in order to ensure the desulfurization effect and the full contact of the alkali liquor and sulfur dioxide gas, the requirement on a nozzle is high, and if the nozzle is damaged, the desulfurization effect is greatly reduced and the maintenance is inconvenient;
In addition, the flow rate of the existing desulfurization device is controlled by the pressure through the nozzle, so that large-flow liquid phase cannot be realized, droplets with the pressure exceeding a certain range can be atomized and discharged out of the device along with flue gas, and alkali liquor is greatly wasted; for small flue gas treatment, large flow is also required, so that the pressure of a nozzle is ensured, and the energy consumption is high; due to the adoption of spray absorption, the drop of liquid in the tower falls down by gravity for a very short residence time, and the desulfurization efficiency is low; the tower top fog removing device is simple and is easy to block.
In order to overcome the above disadvantages, a flue gas desulfurization device is needed, which has good desulfurization effect and high efficiency.
Disclosure of Invention
The invention aims to provide a flue gas desulfurization device which has good desulfurization effect and high efficiency.
The invention provides the following technical scheme:
The flue gas desulfurization device comprises a tower body, wherein the lower end and the upper end of the tower body are respectively provided with an exhaust gas inlet and an exhaust gas outlet, and a demister cleaning spray device, a demister, a first nozzle distributor, a first flow-through sieve plate and a second flow-through sieve plate are sequentially arranged in the tower body from top to bottom;
The first nozzle distributor comprises an alkali inlet pipeline, the alkali inlet pipeline penetrates through the side wall of the tower body, an alkali outlet pipeline is arranged in the alkali inlet pipeline positioned in the tower, and two ends of the alkali outlet pipeline are closed; the middle part of the alkali outlet pipeline is connected with the alkali inlet pipeline; a plurality of alkali outlet nozzles are arranged on the side wall of the alkali outlet pipeline; the alkali outlet nozzle adopts a solid cone nozzle;
The first flow-through screen plate is formed by arranging a plurality of through holes on a circular plate, and the first flow-through screen plate and the second flow-through screen plate have the same structure.
Preferentially, a second nozzle distributor, a third flow-through screen plate and a fourth flow-through screen plate are sequentially arranged below the second flow-through screen plate; the second nozzle distributor has the same structure as the first nozzle distributor; the third flow-through screen plate and the fourth flow-through screen plate have the same structure as the first flow-through screen plate.
Preferentially, the lower end of the through hole of the first flow-through sieve plate is provided with a nozzle, the nozzle is in a leak shape, and the upper end of the nozzle is communicated with the through hole of the first flow-through sieve plate.
Preferentially, two ends of the alkali outlet pipeline are provided with a plurality of connecting lugs on the inner wall of the tower body, and the connecting lugs are connected with two ends of the alkali outlet pipeline.
Preferentially, the peripheries of the first flow-through screen plate, the second flow-through screen plate, the third flow-through screen plate and the fourth flow-through screen plate are positioned on the inner wall of the tower body in a circular array, and a plurality of connecting lugs are connected with the edges of the first flow-through screen plate, the second flow-through screen plate, the third flow-through screen plate and the fourth flow-through screen plate; the lower sides of the first flow-through screen plate, the second flow-through screen plate, the third flow-through screen plate and the fourth flow-through screen plate are respectively provided with a bracket, and two ends of the bracket are connected with the inner wall of the tower body.
Preferentially, a plurality of view holes are further formed in the outer side wall of the tower body, and glass is arranged in each view hole.
The invention has the beneficial effects that:
The nozzle distributor is a large-flow solid cone nozzle, so that droplets are not atomized, and alkali liquor is greatly saved; the alkali liquor is distributed again after passing through the flow-through tower plate, and the flow-through tower plate is flat and has a liquid level height of 3-20 mm during operation, so that the consistency of the liquid phase flowing down each hole of the flow-through sieve plate is ensured, and the uniformity of spraying is also ensured; after the uniformly-distributed flow-through tower plates are adopted, each layer of tower plates is stopped, so that liquid drops are converged into liquid level, the removal speed of the liquid drops which are reduced again is 0, the contact time is greatly increased compared with that of the prior art, the retention time is doubled almost without adding one layer, the gas-liquid contact is more complete after the retention time is increased, and the absorption effect is greatly increased; the wire mesh of the foam remover is not easy to be blocked after the self-flushing foam remover.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a partial view of the present invention;
Fig. 3 is a top view of a first flow-through screen.
Marked in the figure as: 1. cleaning a spray device by a foam remover; 2. a first nozzle distributor; 3. a first flow-through screen plate; 4. a second flow-through screen plate; 5. a third flow-through screen plate; 6. a fourth flow-through screen plate; 7. a second nozzle distributor; 8. a demister; 9. and (5) a visual hole.
Detailed Description
As shown in fig. 1 to 3, a flue gas desulfurization device comprises a tower body, wherein the lower end and the upper end of the tower body are respectively provided with an exhaust gas inlet and an exhaust gas outlet, a demister cleaning spray device 1 and a demister 8 are sequentially arranged in the tower body from top to bottom, a first nozzle distributor 2, a first flow-through screen plate 3 and a second flow-through screen plate 4 are sequentially arranged in the tower body, and the demister 8 comprises a wire mesh demister and a baffle plate demister which are sequentially arranged from top to bottom; the first nozzle distributor 2 comprises an alkali inlet pipeline, the alkali inlet pipeline penetrates through the side wall of the tower body, an alkali outlet pipeline is arranged in the alkali inlet pipeline positioned in the tower, and two ends of the alkali outlet pipeline are closed; in order to ensure uniform alkali discharge, an alkali discharge pipeline can also be arranged in a ring shape, and the middle part of the alkali discharge pipeline is connected with the alkali inlet pipeline; the side wall of the alkali outlet pipeline is provided with a plurality of alkali outlet nozzles, and the alkali outlet nozzles adopt solid cone nozzles; the first flow-through screen plate 3 is formed by arranging a plurality of through holes on a circular plate, and the first flow-through screen plate 3 and the second flow-through screen plate 4 have the same structure; the flow rate of the traditional alkali liquor nozzle is controlled by pressure, and for a large-flow liquid phase, droplets with the pressure exceeding a certain range can not be atomized, and the first nozzle distributor 2 of the device adopts a large-flow alkali outlet nozzle, so that the droplets are not atomized, and the alkali liquor is greatly saved; the large-flow alkali outlet nozzle is selected to treat small flue gas, so that small flow is required to be used, the initial distribution of the alkali outlet nozzle is not even, liquid drops fall on the lower first flow-through screen plate 3 and then are distributed again, and the flow-through screen plate is flat and has a liquid level height of 3-20 mm during operation, so that the consistency of liquid phases flowing down each hole of the flow-through screen plate is ensured, and the uniformity of spraying is also ensured; through the alkali outlet nozzles of the first nozzle distributor 2 and the second nozzle distributor 7, alkali liquor is preliminarily distributed after passing through the alkali outlet nozzles, and then uniformly distributed on the first flow-through screen plate 3 of each section of liquid, and sequentially passes through the following second flow-through screen plates 4, because the flow-through screen plates are very flat and have a liquid level height of 3-20 mm during operation, the liquid phase flowing down each hole of the flow-through screen plates is ensured to be consistent, the spray uniformity is ensured, the liquid phase passes through the following screen plates section by section and finally falls into a tower body, the flue gas after tower top desulfurization is pre-separated through a baffle plate demister, large-particle liquid drops and impurities are removed, and the liquid drops with the diameter smaller than 5-10 mu m are removed again by arranging a high-efficiency screen demister above the baffle plate demister.
Wherein a second nozzle distributor 7, a third flow-through screen plate 5 and a fourth flow-through screen plate 6 are sequentially arranged below the second flow-through screen plate 4; the second nozzle distributor 7 has the same structure as the first nozzle distributor 2; the third flow-through screen plate 5 and the fourth flow-through screen plate 6 have the same structure as the first flow-through screen plate 3, and the distribution times of alkali liquor can be improved through the structure, so that the alkali liquor can be distributed more uniformly; the lower end of the through hole of the first flow-through screen plate 3 is provided with a nozzle, the nozzle is in a leak shape, the upper end of the nozzle is communicated with the through hole of the first flow-through screen plate 3, alkali liquor can flow back through the nozzle, and the alkali liquor is convenient to uniformly distribute; the two ends of the alkali outlet pipeline are provided with a plurality of connecting lugs on the inner wall of the tower body, the connecting lugs are connected with the two ends of the alkali outlet pipeline, the alkali outlet pipeline can be fixed through the connecting lugs, and the connecting lugs can be connected through bolts; the peripheries of the first flow-through screen plate 3, the second flow-through screen plate 4, the third flow-through screen plate 5 and the fourth flow-through screen plate 6 are positioned on the inner wall of the tower body, a plurality of connecting lugs are annularly arranged on the inner wall of the tower body, and the connecting lugs are connected with the edges of the first flow-through screen plate 3, the second flow-through screen plate 4, the third flow-through screen plate 5 and the fourth flow-through screen plate 6; the lower sides of the first flow-through screen plate 3, the second flow-through screen plate 4, the third flow-through screen plate 5 and the fourth flow-through screen plate 6 are respectively provided with a bracket, and two ends of the bracket are connected with the inner wall of the tower body; the device can be fixed through the connecting lugs and can be connected by bolts; the automatic-flushing type foam remover is adopted as the foam remover, the foam remover 8 is flushed by the foam remover cleaning spraying device 1, so that a wire mesh is not easy to block, the foam remover cleaning spraying device can also adopt the same spraying structure of the first nozzle distributor 2, in addition, even if the wire mesh foam remover is blocked a little after a longer operation period, a flushing system can be started, so that the wire mesh foam remover is revived again; the outer side wall of the tower body is also provided with a plurality of sight holes, glass is arranged in the sight holes, and the inner condition of the tower body can be conveniently observed through the sight holes
The working mode of the invention is as follows:
As shown in fig. 1 to 3, the waste gas enters from the lower part of the tower body and goes out from the upper part, alkali liquid is preliminarily distributed after passing through the alkali outlet nozzles of the first nozzle distributor 2 and the second nozzle distributor 7, then uniformly distributed on the first flow-through screen plate 3 of each section of liquid sequentially passes through the second flow-through screen plate 4 below, and the flow-through screen plates are very flat, so that the liquid phase flowing down from each hole of the flow-through screen plates is uniform in operation, the spray uniformity is ensured, the waste gas passes through the following screen plates section by section and finally falls into the tower body, the waste gas after desulfurization at the tower top is pre-separated through a baffle plate demister to remove large-particle liquid drops and impurities, a high-efficiency screen demister is arranged above the baffle plate demister to remove the liquid drops with the diameter smaller than 5-10um, and the screen is difficult to be blocked by flushing the demister 8 by flushing the demister cleaning device 1.
The above is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that the present invention is described in detail with reference to the foregoing embodiments, and modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a flue gas desulfurization device, includes the tower body, tower body lower extreme and upper end are equipped with waste gas import and waste gas outlet respectively, its characterized in that: a demister cleaning spray device, a demister, a first nozzle distributor, a first flow-through screen plate and a second flow-through screen plate are sequentially arranged in the tower body from top to bottom;
The first nozzle distributor comprises an alkali inlet pipeline, the alkali inlet pipeline penetrates through the side wall of the tower body, an alkali outlet pipeline is arranged in the alkali inlet pipeline positioned in the tower body, and two ends of the alkali outlet pipeline are closed; the alkali outlet pipeline is arranged in an annular shape, and the middle part of the alkali outlet pipeline is connected with the alkali inlet pipeline; a plurality of alkali outlet nozzles are arranged on the side wall of the alkali outlet pipeline; the alkali outlet nozzle adopts a solid cone nozzle;
The first flow-through screen plate is formed by arranging a plurality of through holes on a circular plate, and the first flow-through screen plate and the second flow-through screen plate have the same structure;
a second nozzle distributor, a third flow-through screen plate and a fourth flow-through screen plate are sequentially arranged below the second flow-through screen plate; the second nozzle distributor has the same structure as the first nozzle distributor; the third flow-through screen plate and the fourth flow-through screen plate have the same structure as the first flow-through screen plate;
The demister comprises a silk screen demister and a baffle plate demister which are sequentially arranged up and down.
2. A flue gas desulfurization device according to claim 1, wherein: the through-hole lower extreme of first cross flow sieve is equipped with out the mouth, it is the leak form to go out the mouth, go out the upper end of mouth with the through-hole intercommunication of first cross flow sieve.
3. A flue gas desulfurization device according to claim 1, wherein: the two ends of the alkali outlet pipeline are provided with a plurality of connecting lugs on the inner wall of the tower body, and the connecting lugs are connected with the two ends of the alkali outlet pipeline.
4. A flue gas desulfurization device according to claim 1, wherein: the periphery of the first flow-through screen plate, the second flow-through screen plate, the third flow-through screen plate and the fourth flow-through screen plate is provided with a plurality of connecting lugs in a circular array on the inner wall of the tower body, and the connecting lugs are connected with the edges of the first flow-through screen plate, the second flow-through screen plate, the third flow-through screen plate and the fourth flow-through screen plate; the lower sides of the first flow-through screen plate, the second flow-through screen plate, the third flow-through screen plate and the fourth flow-through screen plate are respectively provided with a bracket, and two ends of the bracket are connected with the inner wall of the tower body.
5. A flue gas desulfurization device according to claim 1, wherein: the outer side wall of the tower body is also provided with a plurality of view holes, and glass is arranged in each view hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811597067.2A CN109351168B (en) | 2018-12-26 | 2018-12-26 | Flue gas desulfurization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811597067.2A CN109351168B (en) | 2018-12-26 | 2018-12-26 | Flue gas desulfurization device |
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| Publication Number | Publication Date |
|---|---|
| CN109351168A CN109351168A (en) | 2019-02-19 |
| CN109351168B true CN109351168B (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811597067.2A Active CN109351168B (en) | 2018-12-26 | 2018-12-26 | Flue gas desulfurization device |
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| CN209501330U (en) * | 2018-12-26 | 2019-10-18 | 南京泰斯普化工工程技术有限公司 | A kind of flue gas desulfurization device |
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| CN201094894Y (en) * | 2007-04-27 | 2008-08-06 | 吴金泉 | High-efficiency empty tower spraying flue-gas desulfurizing device |
| CN201710990U (en) * | 2010-06-25 | 2011-01-19 | 唐山三友化工股份有限公司 | Variable aperture dual-flow sieve-plate tower |
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| CN109351168A (en) | 2019-02-19 |
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