CN102671501A - Method for solving ammonia desulphurization tail gas smoke zone - Google Patents
Method for solving ammonia desulphurization tail gas smoke zone Download PDFInfo
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- CN102671501A CN102671501A CN2012101473855A CN201210147385A CN102671501A CN 102671501 A CN102671501 A CN 102671501A CN 2012101473855 A CN2012101473855 A CN 2012101473855A CN 201210147385 A CN201210147385 A CN 201210147385A CN 102671501 A CN102671501 A CN 102671501A
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Abstract
The invention relates to an industrial environment protection processing technology and discloses a method for solving an ammonia desulphurization tail gas smoke zone. The method for solving the ammonia desulphurization tail gas smoke zone is characterized by comprising the steps of: specially preparing a multilayer compound type desulphurization tower, wherein the desulphurization tower comprises a set of electric demister; a cylinder body which is internally provided with an upper atomization spraying layer, a lower atomization spraying layer and 3-5 layers of porous tower plates is mounted below the electric demister; a smoke inlet pipe is arranged below the lower atomization spraying layer on the sidewall of the cylinder body; the upper atomization spraying layer and the lower atomization spraying layer are externally connected with an ammonia water supplying device; the bottom of the cylinder body is provided with a discharge pipe which is connected with an ammonium sulfate pool; industrial tail gas enters into the multilayer compound type desulphurization tower from the smoke inlet pipe; and the tail gas sequentially passes through the lower atomization spraying layer, the porous tower plates and the upper atomization spraying layer from downside to upside and then passes through the electric demister to be desulphurized, purified and discharged. The method for solving the ammonia desulphurization tail gas smoke zone, disclosed by the invention, has the advantages of solving the problems low desulphurization efficiency, no capability for solving ammonia escaping and the like of the conventional air tower ammonia flue gas desulfurization technology and is widely applied to tail gas desulfurization processing in chemical engineering and metallurgical industries.
Description
(1) technical field: the present invention relates to metallurgy, chemical engineering industry environmental protection treatment technology, especially a kind of method that solves ammonia process of desulfurization tail gas cigarette band.
The (2) prior art: the main void tower ammonia type flue gas desulfurizing technology that adopts of present domestic wet ammonia method for flue gas desulfurizing technology, this technology mainly come from the two kinds of turriforms and the sulfur method of simple and easy ammonia process technology of TS/PS and similar limestone-gypsum law technology.The technology that comes from TS/PS is main with venturi combination void tower mostly, supporting recovery system, but insufficient because of the gas-liquid contact, the operation recovering effect is not good.The ammonia-process desulfurization technique of similar limestone-gypsum method void tower prolongs internal structure and the flow process of having used limestone-gypsum basically, and some has done also adjustment such as stream, adverse current, but fails the characteristics of ammonia process are carried out substantial change, and operational effect is undesirable.Desulfuration efficiency is 70～80%, and this technology is simple and easy ammonia process, is not absorption method.Down evaporation and form the sulfuric acid mist aerosol and be difficult to remove of hot blast effect, thus discharge tail gas has obvious cigarette band, can't solve the escaping of ammonia problem, causes second environmental pollution.
The (3) summary of the invention: it is undesirable that the object of the invention will solve existing void tower ammonia type flue gas desulfurizing technical operation effect exactly; Desulfuration efficiency is lower; The sulfuric acid mist aerosol that evaporates under the hot blast effect and form is difficult to remove; Thereby make processing back discharge tail gas still have obvious cigarette band, can't solve problems such as the escaping of ammonia, a kind of method that solves ammonia process of desulfurization tail gas cigarette band is provided.
Concrete scheme of the present invention is: a kind of method that solves ammonia process of desulfurization tail gas cigarette band; It is characterized in that: special have a MULTILAYER COMPOSITE type desulfurizing tower; This desulfurizing tower includes a cover electrostatic precipitator; One cylindrical shell is housed below electrostatic precipitator, is respectively arranged with upper and lower atomizing spray layer, between the atomizing spray layer 3-5 layer porous plate is being installed up and down in the top and the bottom of cylindrical shell; Be positioned on the sidewall of cylindrical shell misting spraying layer below be provided with smoke-intake pipe; Said atomizing spray layer up and down is circumscribed with the ammoniacal liquor feedway, and the bottom of cylindrical shell is equipped with delivery pipe and is connected the ammonium sulfate pond; Industrial tail gas gets into MULTILAYER COMPOSITE type desulfurizing tower from smoke-intake pipe, tail gas from bottom to top successively through atomizing spraying layer, porous plate down, go up the atomizing spray layer, obtain the desulfurizing and purifying discharging through electrostatic precipitator again.
Upper and lower atomizing spray layer has ammonia water pipe described in the present invention, offers a plurality of hole for water sprayings on the ammonia water pipe downwards, on each hole for water spraying atomizer is installed.
Atomizer described in the present invention in the upper and lower atomizing spray layer has the shower nozzle of being with conical cavity, and the Front-end Design spherical cavity of conical cavity is designed with a plurality of atomizing sprays hole on the wall of spherical cavity, a particle diameter≤2mm in atomizing spray hole.
Be distributed with on the porous plate described in the present invention that a plurality of the aperture is 8-15mm by 60 ° of staggered circular holes of angle, the perforated area on the porous plate is 35-55%.
Smoke-intake pipe described in the present invention and cylinder body outer wall are 45 in vertical direction and are in tilted layout.
Operation principle of the present invention is: in industrial tail gas got into tower from smoke-intake pipe, the water curtain that the flue dust of greater particle size is planted by the atomizing spray layer converged, and discharged at the bottom of flowing to tower.Flue gas continues in tower body, to rise, earlier through lower floor's atomizing spray layer washing, absorb and remove parts of fine particle flue dust and SO
2Flue gas rises again through 3-5 layer porous plate, and the porous plate bubbling that is covered with absorption liquid is formed with the froth bed of huge liquid film surface area, has the aerosol of very big liquid film surface area simultaneously on the column plate; Diffusion also takes place in this stage in flue dust, thereby further removes the fine grained flue dust and take off SO
2After this optimal design gas flow rate is provided, has formed bubble level, froth bed and mist layer, thereby made the gas-liquid two-phase contact closer, it is also better to interact, and the efficient of desulfurization is provided, and gas flow rate is fast and gas liquid ratio is little, has saved system energy consumption.
Also adopted electrostatic precipitator among the present invention, utilized corona, the electric charge mode; Make large quantity of moisture flow to the tubular type wallboard; Make hydrone moment lose electric charge through special electric charge delivery system, can flow discharge, solved problems such as the escaping of ammonia, ammonia recovery utilization rate, aerosol at gravity; Discharging tail gas smokelessly is with, and has greatly solved the secondary pollution of exhaust emissions.
The invention has the beneficial effects as follows: change two kinds of turriforms of traditional lime stone-gypsum law technology and the technology of TS/PS, the method that single employing hollow-spraying-tower and trunnion rapids dash is in conjunction with the characteristics of ammonia type flue gas desulfurizing; Hollow cone atomizing spray layer and perforated plate column layer have been increased; Simple in structure, be difficult for stopping up, reduce investment outlay; Smoke desulfurization efficiency is brought up to more than 95% by original 70-80%, and desulfuration efficiency is high.Added electrostatic precipitator; Make hydrone moment lose electric charge through special electric charge delivery system; Under the gravity effect, can flow discharge voluntarily, solve problems such as the escaping of ammonia, ammonia recovery utilization rate, aerosol, discharging tail gas smokelessly is with; Greatly solved the secondary pollution of exhaust emissions, the escaping of ammonia index is lower than 1mg/Nm
3, ammonia (recovery) utilization rate is no less than 98%.
(4)Description of drawings:
Fig. 1 is the structural representation of MULTILAYER COMPOSITE type desulfurizing tower of the present invention;
Fig. 2 is the structure amplification view of atomizer;
Fig. 3 is a fundamental diagram of the present invention.
Among the figure, 1-electrostatic precipitator, the last atomizing spray layer of 2-, 3-cylindrical shell, 4-porous plate; 5-is the atomizing spraying layer down, 6-smoke-intake pipe, 7-atomizer, 8-conical cavity, 9-spherical cavity; 10-atomizing spray hole, 11-MULTILAYER COMPOSITE type desulfurizing tower, 12-ammonium sulfate pond, 13-ammoniacal liquor feedway.
The (5) specific embodiment:
Referring to Fig. 1,2,3; The present invention is at first special to have a MULTILAYER COMPOSITE type desulfurizing tower 11; This desulfurizing tower includes a cover electrostatic precipitator 1; One cylindrical shell 3 is housed below electrostatic precipitator 1, is respectively arranged with upper and lower atomizing spray layer 2,5, at atomizing spray layer 2 up and down, 3-5 layer porous plate 4 is installed between 5 in the top and the bottom of cylindrical shell 3; Be positioned on the sidewall of cylindrical shell 3 misting spraying layer 5 below be provided with smoke-intake pipe 6; Said atomizing spray layer 2,5 up and down is circumscribed with ammoniacal liquor feedway 13, and the bottom of cylindrical shell 3 is equipped with delivery pipe and is connected ammonium sulfate pond 12; Industrial tail gas gets into MULTILAYER COMPOSITE type desulfurizing towers 11 from smoke-intake pipe 6, tail gas from bottom to top successively through atomizing spraying layer 5, porous plate 4 down, go up atomizing spray layer 2, obtain the desulfurizing and purifying discharging through electrostatic precipitator 1 again.
Upper and lower atomizing spray layer 2,5 has ammonia water pipe described in the present embodiment, offers a plurality of hole for water sprayings on the ammonia water pipe downwards, and atomizer 7 is installed on each hole for water spraying; Said atomizer 7 is referring to Fig. 2, and it has the shower nozzle of band conical cavity 8, and the Front-end Design spherical cavity 9 of conical cavity 8 is designed with a plurality of atomizing sprays hole 10 on the wall of spherical cavity 9, atomizing spray hole 10 drip particle diameter≤2mm; Concrete optional particle diameter is 1mm.
Be distributed with on the porous plate described in the present embodiment 4 and a plurality ofly (promptly offer the equally spaced circular hole of plurality of rows by 60 ° of staggered circular holes of angle; Adjacent two row's circular holes dislocation are arranged, and between every row's circular hole apart from equaling among every row distance between adjacent two circular holes, can constitute 60 ° of angles and arrange); The aperture is 8-15mm; Concrete optional 10mm, the perforated area on the porous plate 4 are 35-55%, concrete optional 40%.
Smoke-intake pipe described in the present embodiment 6 is 45 in vertical direction with cylindrical shell 3 outer walls and is in tilted layout.Promptly constitute preferred version of the present invention.
Claims (5)
1. method that solves ammonia process of desulfurization tail gas cigarette band; It is characterized in that: special have a MULTILAYER COMPOSITE type desulfurizing tower; This desulfurizing tower includes a cover electrostatic precipitator; One cylindrical shell is housed below electrostatic precipitator, is respectively arranged with upper and lower atomizing spray layer, between the atomizing spray layer 3-5 layer porous plate is being installed up and down in the top and the bottom of cylindrical shell; Be positioned on the sidewall of cylindrical shell misting spraying layer below be provided with smoke-intake pipe; Said atomizing spray layer up and down is circumscribed with the ammoniacal liquor feedway, and the bottom of cylindrical shell is equipped with delivery pipe and is connected the ammonium sulfate pond; Industrial tail gas gets into MULTILAYER COMPOSITE type desulfurizing tower from smoke-intake pipe, tail gas from bottom to top successively through atomizing spraying layer, porous plate down, go up the atomizing spray layer, obtain the desulfurizing and purifying discharging through electrostatic precipitator again.
2. a kind of method that solves ammonia process of desulfurization tail gas cigarette band according to claim 1 is characterized in that: said upper and lower atomizing spray layer has ammonia water pipe, offers a plurality of hole for water sprayings on the ammonia water pipe downwards, on each hole for water spraying atomizer is installed.
3. a kind of method that solves ammonia process of desulfurization tail gas cigarette band according to claim 2; It is characterized in that: the atomizer in the said upper and lower atomizing spray layer; Shower nozzle with band conical cavity; The Front-end Design spherical cavity of conical cavity is designed with a plurality of atomizing sprays hole on the wall of spherical cavity, a particle diameter≤2mm in atomizing spray hole.
4. a kind of method that solves ammonia process of desulfurization tail gas cigarette band according to claim 1 is characterized in that: be distributed with on the said porous plate that a plurality of the aperture is 8-15mm by 60 ° of staggered circular holes of angle, the perforated area on the porous plate is 35-55%.
5. a kind of method that solves ammonia process of desulfurization tail gas cigarette band according to claim 1, it is characterized in that: said smoke-intake pipe and cylinder body outer wall are 45 in vertical direction and are in tilted layout.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101473855A CN102671501A (en) | 2012-05-14 | 2012-05-14 | Method for solving ammonia desulphurization tail gas smoke zone |
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| CN2012101473855A CN102671501A (en) | 2012-05-14 | 2012-05-14 | Method for solving ammonia desulphurization tail gas smoke zone |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103041687A (en) * | 2012-12-18 | 2013-04-17 | 北京威肯众合环保科技有限公司 | Oil furnace flue gas purification compound tower integrating dust removal, smoke abatement and desulphurization |
| CN103920371A (en) * | 2014-04-29 | 2014-07-16 | 青岛哈纳斯环保设备有限公司 | Absorption tower and flue gas treatment process thereof |
| CN104096458A (en) * | 2014-07-25 | 2014-10-15 | 桐乡市中辰化纤有限公司 | Vacuum furnace water chimney filtration and recovery device |
| CN111186927A (en) * | 2018-11-15 | 2020-05-22 | 魏县聚银环保科技有限公司 | Zero release industrial waste water handles combination equipment |
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| JPH06126123A (en) * | 1992-10-15 | 1994-05-10 | Toshiba Eng & Constr Co Ltd | Exhaut gas absorbing apparatus |
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| CN201384920Y (en) * | 2009-03-25 | 2010-01-20 | 泰州百力化学有限公司 | Ammonia-contained tail gas absorbing device |
| CN201744294U (en) * | 2010-06-25 | 2011-02-16 | 北京紫光威肯环保工程技术有限公司 | Desulfurizing tower for absorbing escaped ammonia from boiler flue by utilizing circulating water |
| CN201823468U (en) * | 2010-10-29 | 2011-05-11 | 殷兴华 | Twin tower ammonia desulfurization device |
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2012
- 2012-05-14 CN CN2012101473855A patent/CN102671501A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH06126123A (en) * | 1992-10-15 | 1994-05-10 | Toshiba Eng & Constr Co Ltd | Exhaut gas absorbing apparatus |
| CN1221307C (en) * | 2003-11-28 | 2005-10-05 | 北京兰颐特能源环境技术有限公司 | Integrative desulfurizing and dedusting tower of ammonia process |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103041687A (en) * | 2012-12-18 | 2013-04-17 | 北京威肯众合环保科技有限公司 | Oil furnace flue gas purification compound tower integrating dust removal, smoke abatement and desulphurization |
| CN103920371A (en) * | 2014-04-29 | 2014-07-16 | 青岛哈纳斯环保设备有限公司 | Absorption tower and flue gas treatment process thereof |
| CN103920371B (en) * | 2014-04-29 | 2016-09-07 | 青岛哈纳斯环保设备有限公司 | A kind of absorption tower and flue gas treating process thereof |
| CN104096458A (en) * | 2014-07-25 | 2014-10-15 | 桐乡市中辰化纤有限公司 | Vacuum furnace water chimney filtration and recovery device |
| CN111186927A (en) * | 2018-11-15 | 2020-05-22 | 魏县聚银环保科技有限公司 | Zero release industrial waste water handles combination equipment |
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Application publication date: 20120919 |