CN102008884A - Side-entry agitating ammonia desulphurization system using oxidation spray gun for addition of ammonia - Google Patents
Side-entry agitating ammonia desulphurization system using oxidation spray gun for addition of ammonia Download PDFInfo
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- CN102008884A CN102008884A CN 201010611491 CN201010611491A CN102008884A CN 102008884 A CN102008884 A CN 102008884A CN 201010611491 CN201010611491 CN 201010611491 CN 201010611491 A CN201010611491 A CN 201010611491A CN 102008884 A CN102008884 A CN 102008884A
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- ammonia
- oxidation
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Abstract
The invention discloses a side-entry agitating ammonia desulphurization system using an oxidation spray gun for addition of ammonia and the system comprises an absorption tower. A flue gas inlet and a flue gas outlet are arranged on the absorption tower, the lower section of the inside of the absorption tower is a slurry chest zone and the upper section of the inside of the absorption tower is a spraying zone, and a circulation line is arranged between the slurry chest and the spraying pipe. A circulation pump is connected on the circulation line, the oxidation spray gun is inserted into the slurry chest, and the oxidation spray is connected with an oxidation blower through an oxidation air pipe. An ammonia adding point is arranged on the oxidation air pipe for adding the oxidation air and ammonia into the slurry chest simultaneously; and the rapid diffusion and the uniform distribution of the oxidation air and ammonia are realized to perform the combination and oxidation reactions with the SO2 dissolving in the slurry and generate stable (NH4)2SO4 through a side-entry agitator which is arranged beside the oxidation spray gun. The invention solves the technical problem of the generation of aerosol in the application of ammonia desulphurization, and can reduce the generation of aerosol greatly from the source, thereby avoiding the loss of ammonia and the generation of secondary pollution. The system can be widely used for the ammonia desulphurization of flue gas.
Description
Technical field
The present invention relates to a kind of ammonia method desulfurizing system.
Background technology
Use ammonia as the SO in the absorbent removal flue gas
2Be a kind of novel desulfur technology, use liquefied ammonia or ammoniacal liquor usually as the absorbent form.The process of the ammonia process of desulfurization is mainly carried out in desulfurizing tower, and Ta Nei can be divided into spray zone and stock tank zone.In the spray district, by circulating pump the slurries in the stock tank are delivered to spraying layer, contact the SO in the flue gas with flue gas adverse current
2Be absorbed and fall into the tower bottom stock tank; In the stock tank zone, by being arranged in oxidation spray gun, the side-feeding mixer of tower side wall, with the SO in the slurries
3 2-Be oxidized to SO
4 2-Thereby, form stable ammonium sulfate solution, reach the purpose of final desulfurization.
In existing engineering was used, the adding point of ammonia mainly contained: stock tank etc. is distinguished, directly added to pump entry (similar limestone-gypsum method dosing technology), tower wall spray.In absorption system, the NH of gaseous state
3Can with flue gas in SO
2Gas-phase reaction takes place, thereby generate aerosol, key component has (NH
4)
2SO
4, (NH
4)
2SO
3, NH
4HSO
3Deng, particle diameter concentrates between 0.07～0.70 μ m, and desulphurization system is difficult to effectively remove to it.Ammonia loss and secondary pollution that aerosol causes are the technical barriers in ammonia process of desulfurization field always, are not effectively solved for a long time.For reducing aerocolloidal generation, methods such as multistage washing, wet electrical dust precipitator collection are arranged in the prior art.But said method all is to handle at the ammonia mist after forming, and can not fundamentally solve aerocolloidal having problems, but also has increased the cost of equipment operation.
Summary of the invention
The invention provides the ammonification of a kind of oxidation spray gun, side is advanced the stirring-type ammonia method desulfurizing system, solve ammonia skewness in the ammonia process of desulfurization and generate the technical problem that aerosol causes ammonia loss and secondary pollution.
The technical solution adopted for the present invention to solve the technical problems is:
The ammonification of this oxidation spray gun, side is advanced the stirring-type ammonia method desulfurizing system, comprise the absorption tower, the absorption tower is connected with smoke inlet and exhanst gas outlet respectively, the inner hypomere in absorption tower is the stock tank district, epimere is the spray district, spray is provided with shower in the district, the circulation line that described shower connects outward is connected with the stock tank district, be connected with circulating pump on the circulation line, insert the aerobic spray gun in the described stock tank district, the oxidation spray gun connects the oxidation air pipe that is connected with oxidation fan outward, and the sidewall of described oxidation spray gun has ammonia to add inlet, and add to manage with ammonia at this place and to be connected, described stock tank district is inserted with the side-feeding type mixer with respect to the outlet adjacent of oxidation spray gun.
Inside, described absorption tower is provided with one deck demist grid at least above the spray district.
Described smoke inlet is positioned at the stage casing, absorption tower of top, stock tank district, and exhanst gas outlet is positioned at the top, absorption tower.
The outlet of described oxidation spray gun is an angle, and angle is towards the stock tank district center, and the side-feeding type mixer is positioned at the angle back upper place.
Ammonia adds inlet and is arranged on the oxidation airduct, does not directly contact slurries; Ammonia and air directly add in the slurries, do not contact flue gas.Oxidation air amount in the oxidation spray gun is much larger than ammonia residual, and ammonia adds some ammonification manifold pressure greater than oxidation air pipe internal pressure.
Beneficial effect of the present invention is as follows:
The present invention adds the oxidation air pipeline with ammonia, by the oxidation spray gun, oxidation air and ammonia is added stock tank simultaneously, simultaneously by being contained in the other side-feeding mixer of oxidation spray gun, realizes the rapid diffusion of air and ammonia and evenly distribution, with the SO that is dissolved in the slurries
2Chemical combination, the stable (NH of oxidation reaction generation take place
4)
2SO
4
Oxidation fan is the essential equipment of ammonia method desulfurizing system and operation continuously, and the adding point of oxidation air is in stock tank and have the agitator effect to realize that the quick, even of gas distributes.Therefore, the present invention adds ammonia in the oxidation air pipeline, no matter from reducing the angle of aerocolloidal generation, all is useful from the angle that improves reaction effect still.
The present invention adds point with pump entry and compares, and the ammonia of adding can react rapidly in the stock tank district, reduces the NH in the slurries
3Thereby concentration reduces the NH in spray district
3Gaseous phase partial pressure reduces aerocolloidal formation; Compare direct the adding with tower wall spray district, avoided the direct mutually and SO of ammonia
2Contact, and more help even distribution; Compare with direct adding stock tank, be more evenly distributed, react rapider, cut the siphonage (ammonia is very easily water-soluble) when having avoided stopping for ammonia.
The invention solves in the application of ammonia process of desulfurization method and produce aerocolloidal technical barrier, can from the source, reduce aerocolloidal formation in a large number, thereby avoid the formation of ammonia loss and secondary pollution, can be widely used in the ammonia process of desulfurization of flue gas.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a structural representation of the present invention.
Reference numeral: 1-absorption tower, 2-stock tank district, 3-spray district, 4-circulating pump, 5-circulation line, 6-demist grid, 7-oxidation spray gun, 8-ammonia adding pipe, 9-side-feeding type mixer, 10-smoke inlet, 11-exhanst gas outlet, 12-oxidation air pipe, 13-ammonia add inlet, 14-shower.
The specific embodiment
Embodiment is referring to shown in Figure 1, the ammonification of this oxidation spray gun, side are advanced the stirring-type ammonia method desulfurizing system, comprise absorption tower 1, and absorption tower 1 is connected with smoke inlet 10 and exhanst gas outlet 11 respectively, smoke inlet 10 is positioned at 1 stage casing, absorption tower of 2 tops, stock tank district, and exhanst gas outlet 11 is positioned at 1 top, absorption tower.Absorption tower 1 inner hypomere is stock tank district 2, and epimere is provided with one deck demist grid 6 at least for spray district 3,1 inside, absorption tower above spray district 3; Be provided with shower 14 in the spray district 3, the described shower 14 outer circulation lines 5 that connect are connected with stock tank district 2, be connected with circulating pump 4 on the circulation line, insert aerobic spray gun 7 in the described stock tank district 2, the oxidation spray gun connects the oxidation air pipe 12 that is connected with oxidation fan outward, the sidewall of described oxidation spray gun 7 has ammonia to add inlet 13, and is connected with ammonia adding pipe 8 at this place, and described stock tank district 2 is inserted with side-feeding type mixer 9 with respect to the outlet adjacent of oxidation spray gun 7.The outlet of oxidation spray gun 7 is an angle, and angle is towards 2 centers, stock tank district, and side-feeding type mixer 9 is positioned at the angle back upper place.
In force, unit load is with 300MW, and 600MW is main, and exhaust gas volumn is from 1200000Nm
3/ h is to 2400000Nm
3/ h changes, SO
2Concentration is from 2000mg/Nm
3To 8000mg/Nm
3Change the corresponding about 1000kg/h to 5000kg/h of ammonia residual scope, the about 6000kg/h to 250000kg/h of oxidation air amount.With the Suqian ammonia process of desulfurization is example, this project exhaust gas volumn 1010000Nm
3/ h, SO
2Concentration 3000mg/Nm
3, actual ammonia residual 1466kg/h, oxidation air amount 7300kg/h.
Ammonia adds inlet and is arranged on the oxidation airduct, does not directly contact slurries; Ammonia and air directly add in the slurries, do not contact flue gas.Oxidation air amount in the oxidation spray gun is much larger than ammonia residual, and ammonia adds some ammonification manifold pressure greater than oxidation air pipe internal pressure.
Claims (6)
1. oxidation spray gun ammonification, side is advanced the stirring-type ammonia method desulfurizing system, comprise absorption tower (1), absorption tower (1) is connected with smoke inlet (10) and exhanst gas outlet (11) respectively, the inner hypomere in absorption tower (1) is stock tank district (2), epimere is spray district (3), be provided with shower (14) in the spray district (3), the outer circulation line (5) that connects of described shower (14) is connected with stock tank district (2), be connected with circulating pump (4) on the circulation line, it is characterized in that: insert aerobic spray gun (7) in the described stock tank district (2), the oxidation spray gun connects the oxidation air pipe (12) that is connected with oxidation fan outward, the sidewall of described oxidation spray gun (7) has ammonia to add inlet (13), and add to manage (8) at this place with ammonia and be connected, described stock tank district (2) is inserted with side-feeding type mixer (9) with respect to the outlet adjacent of oxidation spray gun (7).
2. oxidation spray gun according to claim 1 ammonification, side are advanced the stirring-type ammonia method desulfurizing system, it is characterized in that: described absorption tower (1) is inner to be provided with one deck demist grid (6) at least in top, spray district (3).
3. oxidation spray gun according to claim 2 ammonification, side are advanced the stirring-type ammonia method desulfurizing system, it is characterized in that: described smoke inlet (10) is positioned at the stage casing, absorption tower (1) of top, stock tank district (2), and exhanst gas outlet (11) is positioned at top, absorption tower (1).
4. advance the stirring-type ammonia method desulfurizing system according to claim 2 or 3 described oxidation spray gun ammonifications, side, it is characterized in that: the outlet of described oxidation spray gun (7) is an angle, angle is towards center, stock tank district (2), and side-feeding type mixer (9) is positioned at the angle back upper place.
5. oxidation spray gun according to claim 4 ammonification, side are advanced the stirring-type ammonia method desulfurizing system, it is characterized in that: described ammonia adds inlet (13) and is arranged on the oxidation airduct, does not directly contact slurries, and ammonia and air directly add in the slurries, do not contact flue gas.
6. oxidation spray gun according to claim 4 ammonification, side are advanced the stirring-type ammonia method desulfurizing system, it is characterized in that: the oxidation air amount in the described oxidation spray gun (7) is much larger than ammonia residual, and ammonia adds some ammonification manifold pressure greater than oxidation air pipe internal pressure.
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| CN 201010611491 CN102008884B (en) | 2010-12-29 | 2010-12-29 | Side-entry agitating ammonia desulphurization system using oxidation spray gun for addition of ammonia |
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| CN 201010611491 CN102008884B (en) | 2010-12-29 | 2010-12-29 | Side-entry agitating ammonia desulphurization system using oxidation spray gun for addition of ammonia |
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| CN102008884B CN102008884B (en) | 2013-01-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109991047A (en) * | 2019-04-28 | 2019-07-09 | 北京国电龙源环保工程有限公司 | Have uniformly mixing and patrols the measuring system and detection method for surveying synchronized sampling with subregion |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101306313A (en) * | 2008-02-01 | 2008-11-19 | 国电环境保护研究院 | Flue gas wet desulfurization absorption oxidation device |
| CN101549053A (en) * | 2008-04-03 | 2009-10-07 | 北京中科仁和科技有限公司 | Medicine for treating Parkinson's disease and production method thereof |
| CN201978660U (en) * | 2010-12-29 | 2011-09-21 | 北京国电龙源环保工程有限公司 | Side-feed agitating desulfurizing system by ammonia method and utilizing oxidation spray gun to feed ammonia |
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2010
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101306313A (en) * | 2008-02-01 | 2008-11-19 | 国电环境保护研究院 | Flue gas wet desulfurization absorption oxidation device |
| CN101549053A (en) * | 2008-04-03 | 2009-10-07 | 北京中科仁和科技有限公司 | Medicine for treating Parkinson's disease and production method thereof |
| CN201978660U (en) * | 2010-12-29 | 2011-09-21 | 北京国电龙源环保工程有限公司 | Side-feed agitating desulfurizing system by ammonia method and utilizing oxidation spray gun to feed ammonia |
Non-Patent Citations (1)
| Title |
|---|
| 《火电厂烟气脱硫及脱硝实用技术》 20090131 王文宗等 第二篇 选择性催化还原脱硝（SCR）技术 第134页 1-6 , * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109991047A (en) * | 2019-04-28 | 2019-07-09 | 北京国电龙源环保工程有限公司 | Have uniformly mixing and patrols the measuring system and detection method for surveying synchronized sampling with subregion |
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Address after: 100039 room 901, 9 / F, building 1, yard 16, West Fourth Ring Middle Road, Haidian District, Beijing Patentee after: Guoneng Longyuan environmental protection Co.,Ltd. Address before: 100039 10th floor, building 1, yard 16, West Fourth Ring Middle Road, Haidian District, Beijing Patentee before: BEIJING GUODIAN LONGYUAN ENVIRONMENTAL ENGINEERING Co.,Ltd. |