CN102671528A - Device for reducing escape of tail gas ammonia by ammonia method - Google Patents
Device for reducing escape of tail gas ammonia by ammonia method Download PDFInfo
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- CN102671528A CN102671528A CN2011101346925A CN201110134692A CN102671528A CN 102671528 A CN102671528 A CN 102671528A CN 2011101346925 A CN2011101346925 A CN 2011101346925A CN 201110134692 A CN201110134692 A CN 201110134692A CN 102671528 A CN102671528 A CN 102671528A
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Abstract
The invention provides a device for reducing the escape of tail gas ammonia by an ammonia method, wherein a venturi ammonia purifier is additionally arranged between a demister on the top of a desulfurizing tower and a spraying layer, on the surface of the ammonia purifier, a gas film is continuously peeled by a liquid, and a liquid film is continuously peeled by gas, so that the absorption of aerosol can be guaranteed; the aerosol enters into a venturi turbulent flow region to have a drastic mass transfer reaction-ammonia and ammonium sulfite in smoke can be quickly absorbed by clean water, so that low-concentration ammonia water and an ammonium sulfite solution can be formed, and can be continuously fed to the venturi ammonia purifier so as to update the liquid film; and the desulfurizing tail gas can be purified.
Description
Affiliated technical field
The present invention relates to environmental technology field, is the device that the ammonia process of desulfurization reduces the escaping of ammonia, and especially newly-built coal desulfurization or transform at original desulfurizer makes the desulfidation tail gas ammonia content be reduced to 10mg/Nm
3Below, thereby desulfidation tail gas is thoroughly purified, the real cleaning that realizes is carried out production strictly in line with rules and regulations.
Background technology
The escaping of ammonia is the technical barrier of the puzzlement ammonia process of desulfurization always; At present, the ammonia process of desulfurization does not have special clean ammonia device, but through improve the sulfite oxidation rate, move down the ammonification point, measures such as control doctor solution pH value and spray reduce the desulfidation tail gas ammonia of carrying under one's arms; These measures can only be held back part tail gas band ammonia; But can not fundamentally eliminate tail gas band ammonia; More can not absorb the ammonia and the ammonium sulfite of aerosol state, cause the ammonia process of desulfurization produce in the escaping of ammonia problem serious, even make the ammonia process of desulfurization receive part insider's query.
Summary of the invention
In order to solve this technical barrier of the escaping of ammonia in the ammonia process of desulfurization; The present invention provides a kind of device; Can remove most of ammonia and the ammonium sulfite (ammonia and the ammonium sulfite that comprise aerosol state) carried under one's arms in the flue gas effectively, thereby realize the wonderful dream of the ammonia process of desulfurization for the cleaning service of carrying out production strictly in line with rules and regulations.
The technical solution adopted for the present invention to solve the technical problems is:
A newly-increased cover venturi ammonia purifier between the demister on desulfurizing tower top and spraying layer; Venturi ammonia purifier material is stainless steel, fiberglass or engineering plastics; Above ammonia purifier, establish a cover fresh water (FW) spraying layer; Being the source of ammonia purifier clean water, is again the isorrheic moisturizing point of desulphurization system.
On ammonia purifier gas-liquid fully mix, mass-and heat-transfer, fully absorb desulfidation tail gas hold under the arm into ammonia:
Because the unique texture of venturi ammonia purifier is fully cut apart former flue gas, form multiply shunting flue gas and contact with liquid; Increased the turbulent fluctuation of air-flow; Make the wall liquid film that attaches that forms on the ammonia purifier surface bring in constant renewal in, peel off ammonia and the aerocolloidal air film of ammonium sulfite, thoroughly break aerocolloidal " self-enclosed " state, broken original two-phase mass transfer interface; Guaranteed that clean water to ammonia and the aerocolloidal absorption of ammonium sulfite, has strengthened mass transfer effect.
Simultaneously,, when flue gas contacts with high speed in opposite directions, form one " carrying liquid layer on the back " because the wall attachment effect of slurries has adhered to shower water on the venturi rod---also do not reach liquid flooding, but a liquid phase turbulent area.
According to long-term test and practical operating experiences; About 0.45 meter high of turbulent area above the venturi ammonia purifier; In this turbulent area, form the uptake zone that surrounds gas with liquid, the mass transfer reaction of gas-liquid is very violent; Compare with the spray district of routine, improved the assimilation effect of ammonia and ammonium sulfite greatly; Relend and help the efficient demist layer of two-stage that the desulfurizing tower top is provided with, remove the droplet in the flue gas and further capture the ammonia and the ammonium sulfite of escaping, reduced the escape of gaseous ammonia and ammonium sulfite with flue gas; Thereby reach thorough flue, the real purpose that realizes that cleaning is carried out production strictly in line with rules and regulations.
In order to economize on water, ammonia purifier is installed between the demister and spraying layer on desulfurizing tower top, and optimum before the technology shower water not only made full use of no ammonia supplementing water, and reduced the solid-liquid entrainment of flue gas, the load of subduction day with fog.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Figure SYX11-02 is the device flow chart that the ammonia process of desulfurization of the present invention reduces the tail gas the escaping of ammonia.
1. ammonia-containing exhausts among the figure, 2. venturi ammonia purifier, 3. turbulent area, 4. spray header, 5. demister, 6. cleaning of off-gas outlet (going old flue or directly discharging), 7. each groove jar contains ammonia and drops a hint.
The specific embodiment
In figure SYX11-02, the ammonia-containing exhaust that is processed (1) and each groove jar contain ammonia drop a hint (7) at first be divided into the multiply air-flow through the venturi passage, with clean ammonia shower water (4) contact mass transfer on venturi ammonia purifier (2); Because the unique texture of venturi ammonia purifier has determined gas-liquid on the ammonia purifier surface, air film is constantly peeled off by liquid, and liquid film has guaranteed aerocolloidal absorption constantly by gas stripping; Get into 0.45 meter high turbulent area (3) then and carry out violent mass transfer reaction---ammonia and ammonium sulfite in the clean water fast Absorption flue gas; Form the ammoniacal liquor and the ammonium sulfite solution of low concentration; Venturi ammonia purifier without interruption upgrades liquid film; Liquid (low concentration ammoniacal liquor) spreads the uptake zone to desulfurizing tower by gravity, absorbs SO jointly with the spray circulation fluid
2, accomplish system water supplement, the clean ammonia mission of tail gas.
The tail gas that contains droplet continues the demister (5) on up arrival desulfurizing tower top, and droplet is removed, and the ammonia and the ammonium sulfite of escaping with flue gas are further captured, and return desulfurizing tower; Cleaning of off-gas (6) returns old flue or directly discharges from cat head.
Claims (2)
1. the ammonia process of desulfurization reduces the device of tail gas the escaping of ammonia; A newly-increased cover venturi ammonia purifier between the demister on desulfurizing tower top and spraying layer; Venturi ammonia purifier material is stainless steel, fiberglass or engineering plastics; Above ammonia purifier, establishing a fresh water (FW) spraying layer, is the source of ammonia purifier clean water, is again the isorrheic moisturizing point of desulphurization system.
2. the ammonia process of desulfurization according to claim 1 reduces the device of the escaping of ammonia, and ammonia purifier is installed between the demister and spraying layer at desulfurizing tower top, and the position before getting into desulphurization system supplementing water spraying layer is optimum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101346925A CN102671528A (en) | 2011-05-24 | 2011-05-24 | Device for reducing escape of tail gas ammonia by ammonia method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101346925A CN102671528A (en) | 2011-05-24 | 2011-05-24 | Device for reducing escape of tail gas ammonia by ammonia method |
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| Publication Number | Publication Date |
|---|---|
| CN102671528A true CN102671528A (en) | 2012-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011101346925A Pending CN102671528A (en) | 2011-05-24 | 2011-05-24 | Device for reducing escape of tail gas ammonia by ammonia method |
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| CN (1) | CN102671528A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105817131A (en) * | 2016-05-11 | 2016-08-03 | 西安热工研究院有限公司 | System and method for inhibiting ammonia escape in ammonia desulphurization |
| WO2021128446A1 (en) * | 2019-12-26 | 2021-07-01 | 南京工大环境科技有限公司 | Integrated catalytic conversion system for reducing exhaust-gas ammonia emission and method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101844037A (en) * | 2010-06-12 | 2010-09-29 | 上海电力学院 | Tower for flue gas desulfurization in homogeneous air-humidifying method |
-
2011
- 2011-05-24 CN CN2011101346925A patent/CN102671528A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101844037A (en) * | 2010-06-12 | 2010-09-29 | 上海电力学院 | Tower for flue gas desulfurization in homogeneous air-humidifying method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105817131A (en) * | 2016-05-11 | 2016-08-03 | 西安热工研究院有限公司 | System and method for inhibiting ammonia escape in ammonia desulphurization |
| WO2021128446A1 (en) * | 2019-12-26 | 2021-07-01 | 南京工大环境科技有限公司 | Integrated catalytic conversion system for reducing exhaust-gas ammonia emission and method thereof |
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Address after: 100101 Beijing city Chaoyang District Datun Road Theo center A block 12 layer Applicant after: Beijing Haotian Baineng Environmental Protection Engineering Co., Ltd. Address before: 100096, Beijing, Haidian District, Xisanqi building materials East Road, No. 18, three floor, Bai Hui building Applicant before: Beijing Haotian Baineng Environmental Protection Engineering Co., Ltd. |
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Application publication date: 20120919 |