CN101811093A - Phosphoric acid tail gas electric demister - Google Patents
Phosphoric acid tail gas electric demister Download PDFInfo
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- CN101811093A CN101811093A CN 201010127141 CN201010127141A CN101811093A CN 101811093 A CN101811093 A CN 101811093A CN 201010127141 CN201010127141 CN 201010127141 CN 201010127141 A CN201010127141 A CN 201010127141A CN 101811093 A CN101811093 A CN 101811093A
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Abstract
The invention discloses a phosphoric acid tail gas electric demister which adopts a constant current high-voltage DC power 30-70 kV to produce a high-voltage electrostatic field. An anode static electricity sediment tube adopts a honeycombed, triangle or square structure so as to ensure that the arrangement structure of equipment is compact, the area of the electrostatic field is enlarged, and the phosphoric acid tail gas handling capacity is improved; a high-voltage electrostatic field is provided with a cooling system; phosphoric acid tail gas enters the anode static electricity sediment tube from a distribution chamber to be further cooled to reduce the flow velocity of the phosphoric acid tail gas, enhance ionization effect and improve phosphoric acid deposition rate, thereby purifying the phosphoric acid tail gas. After the phosphoric acid tail gas is electrically demisted and purified, the phosphoric acid tail gas which contains a small quantity of steam is discharged, and no smoke exists visually. The content of phosphoric acid in the phosphoric acid tail gas is lowered to be less than or equal to 1 PPM from the content which is more than or equal to 50 PPM after the phosphoric acid tail gas is electrically demisted, and the phosphoric acid yield is improved by above 0.5%.The invention solves the problem of environment pollution caused by phosphoric acid production, effectively protects factories and peripheral environment and improves economic and social benefits.
Description
Technical field:
The invention belongs to phosphorous chemical industry technology and environmental protection technical field, relate to a kind of phosphoric acid tail gas electric demister.
Technical background:
Tail gas contains phosphorus pentoxide, diphosphorus trioxide and foreign gas such as elemental phosphorous in the phosphoric acid production, and the discharging of this type of tail gas will cause serious air pollution.Existing exhaust gas treating method is generally WATER-WASHING METHOD, Li Yun, Zhou Junhong is at " thermal phosphoric acid produce exhaust emissions phosphorus pentoxide exceed standard the analysis of causes and countermeasure ", design of sulphur phosphorus and powder technology, 2006 the 5th phases, in mention phosphorus pentoxide content severe overweight in the thermal phosphoric acid production discharge tail gas, propose the countermeasure of two aspects: first aspect is that production process equipment is transformed and optimized operating condition, reduces discharge of harmful gases; Calculating two aspects is that the acid spray that will change the offgas duct the superiors is the water spray, reduces exhaust temperature to reduce the phosphoric acid vapor partial pressure, improves hydration rate simultaneously, reduces the phosphorus pentoxide in the gas phase; The method of tradition phosphoric acid production tail gas demist also has and uses the demist of secondary retaining, wire packing demist, and its effect is very not undesirable.
The method of a kind of load type active carbon catalyzing, oxidizing and purifying thermal phosphoric acid tail gas of Chinese patent CN200910094120.1, be to be carrier with the active carbon, the blue or green cobalt of load sulfonation phthalein, copper ion, cerium ion active component promptly get the modified load-type active carbon after the drying roasting again.This active carbon is carried out the catalyzing, oxidizing and purifying reaction as fixed bed to the tail gas of thermal phosphoric acid production, purify the phosphorus pentoxide that removes in the tail gas, diphosphorus trioxide and foreign gas such as elemental phosphorous.Have advantage purification efficiency height, alleviate the renewable recycling of pollution, active carbon environment.But, because the preparation of modified activated carbon and carried active carbon regeneration have strengthened the cost of handling tail gas.
At present, be used for industrial aerosol purified treatment such as coal gas, titanium white, sulfuric acid, smelting, the purification apparatus of use has plumbous electrostatic precipitator, PVC-U electrostatic precipitator, fiberglass electrostatic precipitator, fiberglass PP composite material electrostatic precipitator etc.The precipitation pole plate form of electrostatic precipitator mainly contains tubular type, board-like.As the fiberglass PP composite material electrostatic precipitator of Chinese patent CN02159086.9, be a kind of device that is used for titanium white, sulfuric acid, the purification of metallurgical off-gas acid-making production acid mist efficiently; The condensing electrostatic precipitator of Chinese patent ZL97233678.8 is the improvement that the sulfuric acid chemical industry is not equipped with, and it is simple in structure, and a device is dual-purpose, and not only removal of impurities but also cool off reaches the technological requirement of system sulfuric acid industry; The high flow rate electrostatic precipitator of Chinese patent ZL94238778.3, feature is to use pure lead, lead-antimony alloy and the steel alloy of anti-sulfuric acid, is reversed into the banded zigzag corona discharge electrode of spiral helicine water chestnut, can make electric-field intensity more even, improves the efficient of removing acid mist or mist of oil; The square tube type electrostatic precipitator of Chinese patent ZL200420080164.1, it is improvement to electrostatic precipitator receiving electrode structure, mainly comprise precipitation electrodes and sparking electrode, the receiving electrode pipe is square rhs-structure, sparking electrode hangs on the center of every receiving electrode pipe, realize compact equipment, reduce the cost of equipment, and guarantee the operating efficiency of electrostatic precipitator; The wide polar distance electric demisting device with conductive fiberglass reinforced plastic of Chinese patent ZL200620098242.X is diameter and the length that strengthens electrode tube, and electrode tube is round, positive square, positive hexangle type, and improves inferior rate to the 100～200KW that attacks, and improves demist efficient; The distribution device in gas-fluid of a kind of electrostatic precipitator of Chinese patent ZL200720187450.1 is the improvement of the distribution device of electrostatic precipitator during a kind of sulfuric acid industry is produced.It is characterized in that this distribution device in gas-fluid is the distribution grid of four " umbrella " shapes being made up of four inclined-planes, can guarantee that gas evenly distributes on the electrostatic precipitator cross-sectional area, thereby improved the fog effect that removes of electric mist, simultaneously also reduced to have prolonged the service life of electric mist polar curve because of of the damage of gas concentration of local to electric mist polar curve.
We are according to being used for electrostatic precipitator electricity demist principle and the phosphoric acid production vent gas treatment technology that aerosol purified treatment such as coal gas, titanium white, sulfuric acid, smelting are used to existing for many years, set out in conjunction with phosphoric acid production is actual, this phosphoric acid tail gas electric demister has been invented in research.Through looking into all the other documents, phosphoric acid tail gas is handled all the purifier that makes the electricity consumption demist.In above-described phosphoric acid tail gas purified treatment, adopt the processing of WATER-WASHING METHOD absorption liquid, can be faced with and cause secondary pollution problem.Use the demist of secondary retaining, wire packing demist, its effect is very not undesirable.Working load activated carbon catalysis oxidation, purification has then strengthened the cost of handling tail gas, and it is also relatively poor to handle tail-gas quality stability.As adopt electric demister of the present invention to handle the tail gas of phosphoric acid, and it is stable to reach depuration quality, and can avoid the secondary pollution problem, and processing cost is also lower.
Summary of the invention:
Purpose of the present invention: be the problems of the prior art of handling phosphoric acid tail gas in order to solve, aim to provide a kind of economical and practical, depuration quality is stable, and the phosphoric acid tail gas electric demister of non-secondary pollution solves the environmental pollution of phosphoric acid production and the problem of raising economical, societal benefits.
Technical scheme of the present invention is:
According to high-pressure electrostatic deposition principle, utilize the high voltage and constant current dc source to produce the high-voltage electrostatic field ionization takes place, produce free electron and cation, electronics near the negative electrode high pressure is effectively quickened by highfield, charged ion and form electron avalanche, the phosphoric acid molecules of these electronics and phosphoric acid tail gas is adsorbed onto the anode tube electrostatic precipitation rapidly after forming anion, form neutral molecule phosphoric acid drop, flow to the phosphoric acid,diluted groove downwards along anode tube, regularly add hot water injection's anode tube from the electric demister top, obtain tail gas recycle phosphoric acid, the gas of purification is discharged from the gas outlet, top.
The present invention is achieved in that
Phosphoric acid tail gas electric demister, be provided with discharge chamber, cooling chamber, gas distributing chamber, inlet plenum, its parts comprise: high voltage and constant current dc source lead wire insulation case, no lead wire insulation case, top cover, housing, discharge chamber manhole, corona electrode device, card one, anode electrostatic precipitation pipe, water inlet, card two, gas distributing chamber's manhole, gas distribution grid, inlet plenum manhole, inclined bottom plate, sewage draining exit, air inlet, delivery port, gas outlet and flusher are formed.
The connection of above-described electric demister parts comprises: high voltage and constant current dc source lead wire insulation case is fixed on the top cover, and be connected with the corona electrode device, no lead wire insulation case is fixedly connected on the top cover, top cover is connected with flange with housing, card one, card two welds with anode electrostatic precipitation pipe and housing respectively, gas distribution grid welds with housing between gas distributing chamber's manhole and inlet plenum manhole, inclined bottom plate is positioned at housing bottom and housing welding, flusher is fixed on the top cover, delivery port, water inlet lays respectively at card one bottom and is connected with housing with card two tops, air inlet is positioned at inlet plenum middle part and housing welding, sewage draining exit is positioned at inlet plenum and inclined bottom plate low level and housing welding, flusher and top cover welding.
The top cover of the above purifier, housing, corona electrode device, anode electrostatic precipitation pipe, card, gas distribution grid, inclined bottom plate, flange etc. are made of stainless steel material, except that the corona electrode device, or adopt lead plating to reply condensation material and/or PYC composite and/or fiberglass and/or the making of fiberglass PP composite material by cable.
The electric demist of the above purifier is the high voltage and constant current dc source that adopts 30～70KV.
The conveying equipment of the phosphoric acid tail gas of the above purifier adopts positive pressure fan or negative-pressure air fan, just adopts malleation or negative-pressure operation.
Every cathode line of the corona electrode device of the above purifier is passed from anode electrostatic precipitation tube hub.
The anode electrostatic precipitation pipe of the above purifier is honeycomb type or triangular form or square or round.
Advantage of the present invention and good effect:
The phosphoric acid tail gas electric demister is to adopt high voltage and constant current dc source 30～70KV to produce the high-voltage electrostatic field; Anode electrostatic precipitation pipe adopts the structure of honeycombed, triangular form, square, can make the arrangement architecture compactness of equipment, increase the area of electrostatic field, improve the treating capacity of phosphoric acid tail gas, the high-voltage electrostatic field is sent out cooling system is set, and phosphoric acid tail gas enters anode electrostatic precipitation pipe by gas distributing chamber and further lowered the temperature, reduce its flowing velocity, increase the ionization effect, improve the phosphoric acid precipitates rate, thereby reach the purification of phosphoric acid tail gas.After the phosphoric acid tail gas electric demist purified treatment, give off and only contain a spot of steam, visually insentience has flue gas fully.The phosphorus acid content of phosphoric acid tail gas is reduced to after electric demist≤1PPM by 〉=50PPM, and the phosphoric acid yield improves more than 0.5%, solves the environmental pollution problems of phosphoric acid production, protects factory and surrounding enviroment effectively, has improved economic and social benefit.
Description of drawings:
Accompanying drawing 1: be apparatus of the present invention structural representation.
Identify among the figure: 1, high voltage and constant current dc source lead wire insulation case; 2, no lead wire insulation case; 3, top cover; 4, flange; 5, housing; 6 discharge chamber manholes; 7, corona electrode device; 8, card one; 9, delivery port; 10, anode electrostatic precipitation pipe; 11, card two; 12, gas distributing chamber's manhole; 13, gas distribution grid; 14, inlet plenum manhole; 15, inclined bottom plate; 16, sewage draining exit; 17, air inlet; 18, water inlet; 19, gas outlet; 20, flusher.
The specific embodiment:
Below in conjunction with drawings and Examples apparatus of the present invention are described in detail.
Embodiment:
Phosphoric acid tail gas electric demist cleaning equipment device, high voltage and constant current dc source lead wire insulation case 1 is fixed on the top cover 3, and is connected with corona electrode device 7; No lead wire insulation case 2 is fixedly connected on the top cover 3; Top cover 3 is connected with housing 5 usefulness flanges 4; Card 1, card 2 11 weld with anode electrostatic precipitation pipe 10 and housing 5 respectively; Gas distribution grid 13 welds with housing 4 between gas distributing chamber's manhole 12 and inlet plenum manhole 14; Inclined bottom plate 15 is positioned at housing 5 bottoms and housing 5 welding; Flusher 20 is fixed on the top cover 3; Delivery port 9, water inlet 18 lay respectively at card one 8 bottoms and card 2 11 tops and 5 outer connections of housing; Air inlet 17 is positioned at inlet plenum and housing 5 welding; Sewage draining exit 16 is positioned at inclined bottom plate 15 low levels and housing 5 welding; Gas outlet 19 is located at top cover 3 centre positions; Flusher 20 and top cover 3 welding; Every cathode line of corona electrode device 7 is passed from anode electrostatic precipitation pipe 10 centers.
Technological operation step of the present invention is: electric demist purifier coolant intake 18 and delivery port 9 water valves are opened control delivery port 9 temperature≤40 ℃; Close then high voltage and constant current dc source lead wire insulation case 2 power supplys of electric defogging equipment, control high voltage and constant current dc source 30-70KV; Phosphoric acid tail gas adopts malleation or negative-pressure operation, when phosphoric acid tail gas be cooled to≤50 ℃ after, be transported to electric defogging equipment bottom air inlet 17 and enter inlet plenum, enter equal air chamber through entering card 2 11; Enter anode electrostatic precipitation pipe 10 then, high voltage and constant current dc source through 30～70KV produces high-voltage electrostatic field generation ionization, produce free electron and cation, electronics near the negative electrode high pressure is effectively quickened by highfield, charged ion and form electron avalanche, these electronics and phosphoric acid molecules are adsorbed onto 9 electrostatic precipitations of anode electrostatic precipitation pipe rapidly after forming anion, form neutral molecule phosphoric acid drop, flow to inlet plenum bottom inclined bottom plate 15 downwards along anode electrostatic precipitation pipe 10, enter the phosphoric acid,diluted groove through sewage draining exit 16.Regularly add hot water injection's anode electrostatic precipitation pipe 10 from electric defogging equipment top flusher 20, obtain tail gas recycle phosphoric acid, the gas of purification is 19 discharges from the gas outlet, top.The phosphorus acid content of phosphoric acid production tail gas is reduced to after electric demist≤1PPM by 〉=50PPM, and the phosphoric acid yield improves more than 0.5%.
Claims (6)
1. phosphoric acid tail gas electric demister, be provided with discharge chamber, cooling chamber, gas distributing chamber, inlet plenum, it is characterized in that: high voltage and constant current dc source lead wire insulation case (1) is fixed on the top cover (3), and be connected with corona electrode device (7), no lead wire insulation case (2) is fixed on the top cover (3), top cover (3) is connected with flange (4) with housing (5), card one (8), card two (11) welds with anode electrostatic precipitation pipe (10) and housing (5) respectively, gas distribution grid (13) is positioned between gas distributing chamber's manhole (12) and the inlet plenum manhole (14) and welds with housing (5), inclined bottom plate (15) is positioned at housing (5) bottom and housing (5) welding, flusher (20) is fixed on the top cover (3), delivery port (9), water inlet (18) lays respectively at card one (8) bottom and is connected with housing (5) with card two (11) tops, air inlet (17) is positioned at inlet plenum middle part and housing (5) welding, sewage draining exit (16) is positioned at inlet plenum inclined bottom plate (15) low level and housing (5) welding, flusher (20) and top cover (3) welding.
2. electric demister according to claim 1, it is characterized in that: top cover (3), housing (5), corona electrode device (7), anode electrostatic precipitation pipe (10), card (8), (11), gas distribution grid (13), inclined bottom plate (15), flange (4) are made of stainless steel material, except that corona electrode device (7), or adopt the lead plating composite or/and the PYC composite or/and fiberglass or/and the fiberglass PP composite material make.
3. electric demister according to claim 1 is characterized in that: the high voltage and constant current dc source that adopts 30～70KV.
4. electric demister according to claim 1 is characterized in that: the conveying equipment of phosphoric acid tail gas, adopt positive pressure fan or negative-pressure air fan.
5. electric demister according to claim 1 is characterized in that: every cathode line of corona electrode device (7) is passed from anode electrostatic precipitation pipe (10) center.
6. electric demister according to claim 1 is characterized in that: anode electrostatic precipitation pipe (10) is honeycomb type or triangular form or square or round.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010127141 CN101811093A (en) | 2010-03-18 | 2010-03-18 | Phosphoric acid tail gas electric demister |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010127141 CN101811093A (en) | 2010-03-18 | 2010-03-18 | Phosphoric acid tail gas electric demister |
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| CN101811093A true CN101811093A (en) | 2010-08-25 |
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| CN 201010127141 Pending CN101811093A (en) | 2010-03-18 | 2010-03-18 | Phosphoric acid tail gas electric demister |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102294302A (en) * | 2011-06-28 | 2011-12-28 | 广东佳德环保科技有限公司 | Upper inlet type electrical demister for smoke desulphurization |
| CN102962134A (en) * | 2012-11-13 | 2013-03-13 | 青岛通力机械制造有限公司 | Mixed acid removing method based on polyvinyl chloride carbon composite precipitating pole |
| CN102964718A (en) * | 2012-11-13 | 2013-03-13 | 青岛通力机械制造有限公司 | Polyvinyl chloride carbon mixed-acid-resistant sediment pole and preparation method thereof |
| CN102974462A (en) * | 2012-11-13 | 2013-03-20 | 青岛通力机械制造有限公司 | Corrosion-resisting high-efficiency electro-filtration acid mist removing device |
| CN103553084A (en) * | 2013-10-24 | 2014-02-05 | 石家庄凤山化工有限公司 | Method and device for treating converted gas in production of sodium nitrate |
| CN103771368A (en) * | 2013-12-30 | 2014-05-07 | 广西明利化工有限公司 | Device for producing electronic grade phosphoric acid employing clapboard crystallization |
| CN103771370A (en) * | 2013-12-30 | 2014-05-07 | 广西明利化工有限公司 | Device for producing electronic grade phosphoric acid through U-shaped tube crystallization |
| CN103962239A (en) * | 2014-04-09 | 2014-08-06 | 湖北荣呈环保科技有限公司 | Electrostatic salt fog removal device |
| CN104226479A (en) * | 2014-08-27 | 2014-12-24 | 中国环境科学研究院 | Efficient wet type electric dedusting and purifying device and method for smoke obtained after wet desulphurization |
| CN105080711A (en) * | 2015-09-07 | 2015-11-25 | 李爱云 | Electrostatic dust collector |
| CN105478234A (en) * | 2015-05-07 | 2016-04-13 | P&P工业技术有限责任公司 | Tubular filter |
| CN105536990A (en) * | 2015-12-18 | 2016-05-04 | 河北宁泊环保有限公司 | Wet fog electrostatic precipitator |
| WO2016086826A1 (en) * | 2014-12-01 | 2016-06-09 | 四川玖长科技有限公司 | Improved device for preparing phosphoric acid from kiln egression flue gas of phosphoric acid process of kiln method, and phosphoric acid preparing process |
| CN105772224A (en) * | 2016-05-12 | 2016-07-20 | 海宁国能中电节能环保设备技术有限公司 | Anode module structure of wet type tubular electric precipitator |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102294302A (en) * | 2011-06-28 | 2011-12-28 | 广东佳德环保科技有限公司 | Upper inlet type electrical demister for smoke desulphurization |
| CN102962134A (en) * | 2012-11-13 | 2013-03-13 | 青岛通力机械制造有限公司 | Mixed acid removing method based on polyvinyl chloride carbon composite precipitating pole |
| CN102964718A (en) * | 2012-11-13 | 2013-03-13 | 青岛通力机械制造有限公司 | Polyvinyl chloride carbon mixed-acid-resistant sediment pole and preparation method thereof |
| CN102974462A (en) * | 2012-11-13 | 2013-03-20 | 青岛通力机械制造有限公司 | Corrosion-resisting high-efficiency electro-filtration acid mist removing device |
| CN103553084B (en) * | 2013-10-24 | 2016-01-06 | 石家庄凤山化工有限公司 | SODIUMNITRATE transforms the method and apparatus of gas disposal in producing |
| CN103553084A (en) * | 2013-10-24 | 2014-02-05 | 石家庄凤山化工有限公司 | Method and device for treating converted gas in production of sodium nitrate |
| CN103771368B (en) * | 2013-12-30 | 2016-03-02 | 广西明利化工有限公司 | A kind of baffle crystallization produces the device of electron-level phosphoric acid |
| CN103771370A (en) * | 2013-12-30 | 2014-05-07 | 广西明利化工有限公司 | Device for producing electronic grade phosphoric acid through U-shaped tube crystallization |
| CN103771370B (en) * | 2013-12-30 | 2016-03-02 | 广西明利化工有限公司 | The device of electron-level phosphoric acid is produced in a kind of U-tube crystallization |
| CN103771368A (en) * | 2013-12-30 | 2014-05-07 | 广西明利化工有限公司 | Device for producing electronic grade phosphoric acid employing clapboard crystallization |
| CN103962239A (en) * | 2014-04-09 | 2014-08-06 | 湖北荣呈环保科技有限公司 | Electrostatic salt fog removal device |
| CN104226479A (en) * | 2014-08-27 | 2014-12-24 | 中国环境科学研究院 | Efficient wet type electric dedusting and purifying device and method for smoke obtained after wet desulphurization |
| CN104226479B (en) * | 2014-08-27 | 2017-06-06 | 中国环境科学研究院 | The high-efficient wet-type electric precipitation purifier and method of a kind of wet-method desulfurized fume |
| WO2016086826A1 (en) * | 2014-12-01 | 2016-06-09 | 四川玖长科技有限公司 | Improved device for preparing phosphoric acid from kiln egression flue gas of phosphoric acid process of kiln method, and phosphoric acid preparing process |
| CN105478234A (en) * | 2015-05-07 | 2016-04-13 | P&P工业技术有限责任公司 | Tubular filter |
| CN105080711A (en) * | 2015-09-07 | 2015-11-25 | 李爱云 | Electrostatic dust collector |
| CN105536990A (en) * | 2015-12-18 | 2016-05-04 | 河北宁泊环保有限公司 | Wet fog electrostatic precipitator |
| CN105772224A (en) * | 2016-05-12 | 2016-07-20 | 海宁国能中电节能环保设备技术有限公司 | Anode module structure of wet type tubular electric precipitator |
| CN105772224B (en) * | 2016-05-12 | 2017-08-01 | 海宁国能中电节能环保设备技术有限公司 | A kind of tubular type wet electrical dust precipitator anode module structure |
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| ASS | Succession or assignment of patent right |
Owner name: GUANGXI QINZHOU GUIJINNUO PHOSPHOR CHEMICAL CO., L Free format text: FORMER OWNER: GUANGXI MINGLI GROUP CO., LTD. Effective date: 20110128 |
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Free format text: CORRECT: ADDRESS; FROM: 535000 INDUSTRIAL PARK, QINZHOU PORT ECONOMIC DEVELOPMENT ZONE, QINZHOU CITY, GUANGXI ZHUANG AUTONOMOUS REGION TO: 535000 DATIAN INDUSTRIAL AREA, SHABU TOWN, QINZHOU CITY, GUANGXI ZHUANG AUTONOMOUS REGION |
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Effective date of registration: 20110128 Address after: 535000 Datian Industrial Zone, Sha Bu Town, the Guangxi Zhuang Autonomous Region, Qinzhou Applicant after: Guangxi Qinzhou Guijinnuo Phosph-chemicals Co., Ltd. Address before: 535000 Industrial Zone, Qinzhou Port Economic Development Zone, Qinzhou, the Guangxi Zhuang Autonomous Region Applicant before: Guangxi Mingli Group Co., Ltd. |
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Application publication date: 20100825 |