CN102302890A - Hydrogen chloride gas circulating recovery system - Google Patents
Hydrogen chloride gas circulating recovery system Download PDFInfo
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- CN102302890A CN102302890A CN201110110248A CN201110110248A CN102302890A CN 102302890 A CN102302890 A CN 102302890A CN 201110110248 A CN201110110248 A CN 201110110248A CN 201110110248 A CN201110110248 A CN 201110110248A CN 102302890 A CN102302890 A CN 102302890A
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Abstract
The invention relates to a hydrogen chloride gas circulating recovery system, which is characterized in that: a main body comprises a hydrogen chloride tail gas tank, a first-stage falling film tower, a second-stage falling film tower and a third-stage packing tower which are parallelly arranged, and a vacuum buffer tank which participates in forming a circulating system, wherein a gas outlet of the vacuum buffer tank is connected with a gas inlet of a water ring vacuum unit; a discharge hole of the water ring vacuum unit is connected to feeding holes of a circulating tank 1, a circulating tank 2 and a circulating tank 3 respectively; and a discharge hole on the left side of the circulating tank 3 is connected with a circulating finished product tank. Hydrogen chloride tail gas generated in the process of producing industrial sulfanilamide is subjected to circulating absorption through the structure, and the obtained hydrochloric acid can be recycled, so that the resource utilization rate is fully improved, pollution-free production is promoted, production cost is reduced, and the zero emission index of hydrogen chloride gas is met.
Description
Technical field
The present invention relates to the hydrogen chloride gas that produces in a kind of manufacture sulfanilamide (SN), to its hydrogen chloride gas recirculation system that reclaims.
Background technology
At present; Be applied to chemical industry; In the industry workshop of manufacture sulfanilamide (SN); Handle for the hydrogen chloride tail gas that produces; Adopt frame mode shown in Figure 2 to absorb processing; This structure comprises hydrogen chloride tail gas pipe 1, film-falling absorption tower 10, condenser 11 and the finished product recycling can 9 that the order installation connects; This structural manufacturing process is simple; The hydrogen chloride gas that absorbs can only carry out the immersion method absorption on absorption tower and two simple parts of condenser; For the concentration of hydrochloric acid content that reclaims less than, the hydrochloric acid of absorption utilizes and does not also reach specified value.So the gas of getting rid of in the tail gas also contains a large amount of hydrogen chloride gas, do not reach and carry out the industrialization accepted standard, utilization rate is not high.For not being absorbed, the hydrogen chloride gas that gives off carries out the treatment cost that vent gas treatment also needs high amount.
Summary of the invention
Technical problem to be solved by this invention provides a kind of hydrogen chloride gas recirculation system that tail gas is all absorbed, reaches hydrogen chloride gas zero-emission index.
The present invention solves the technical scheme that its technical problem takes: a kind of hydrogen chloride gas recirculation system; Main body comprises hydrogen chloride tail gas jar, one-level falling-film tower, secondary falling-film tower and three grades of packed towers of installation arranged side by side, and the gas outlet of said hydrogen chloride tail gas jar is connected with the air inlet on one-level falling-film tower top; The discharging opening of one-level falling-film tower lower end connects circulating tank three, and the gas outlet of one-level falling-film tower bottom connects the air inlet on secondary falling-film tower top; The discharging opening of secondary falling-film tower lower end connects circulating tank two, and the gas outlet of secondary falling-film tower bottom connects the air inlet of three grades of packed tower bottoms; The gas outlet that the discharging opening of three grades of packed tower lower ends connects one, three grade of packed tower upper end of circulating tank connects the vacuum buffer tank air inlet; The gas outlet of vacuum buffer tank connects the air inlet of water ring vacuum unit; One side of water ring vacuum unit air inlet offers water inlet, and the discharging opening of water ring vacuum unit connects the charging aperture of the charging aperture of circulating tank one, circulating tank two and the charging aperture of circulating tank three respectively; The discharging opening in circulating tank three left sides connects circulation finished product jar.
For absorption that the hydrogen chloride gas that concentration is not high in the last tail gas is circulated, said circulating tank one right-hand member gas outlet is connected with pump one; The air inlet that pump one connects three grades of packed tower upper right.
For the secondary falling-film tower being absorbed the absorption that circulates of incomplete hydrogen chloride gas, said circulating tank two right-hand member gas outlets are connected with pump two; The air inlet that pump two connects secondary falling-film tower upper right.
For absorption that the incomplete hydrogen chloride gas of absorption in the one-level falling-film tower is circulated, said circulating tank three right-hand member gas outlets are connected with pump three; The air inlet that pump three connects one-level falling-film tower upper right.
The invention has the beneficial effects as follows: adopt this structure; Improved the rate of recovery of hydrogen chloride gas; Can reach hundred-percent recycling for the hydrogen chloride gas in the tail gas; And the quality and the content of hydrochloric acid have been improved; Concentration of hydrochloric acid can arrive 30%, and the hydrochloric acid of recovery can be as the acid-base titration agent raw material of products such as the raw material of producing the hydroxylamine hydrochloride product and sulfadimidine.Reduced the pollution of hydrogen chloride, need not add the treating apparatus of hydrogen chloride in the vent gas treatment, better promoted cleaner production, reduced the pollution treatment cost air.
Description of drawings:
Fig. 1 is a connection sketch map of the present invention;
Fig. 2 is the sketch map of original absorption plant.
Among the figure: 1, hydrogen chloride tail gas jar 2, one-level falling-film tower 3, secondary falling-film tower 4, three grades of packed towers 5, vacuum buffer tank 6, water ring vacuum unit 6-1, water inlet 7-1, pump one 7-2, pump two 7-3, pump three 8-1, circulating tank one 8-2, circulating tank two 8-3, circulating tank 39, finished product recycling can 10, film-falling absorption tower 11, condenser.
The specific embodiment
A kind of hydrogen chloride gas recirculation system shown in Figure 1; Main body comprises hydrogen chloride tail gas jar 1, one-level falling-film tower 2, secondary falling-film tower 3 and three grades of packed towers 4 of installation arranged side by side, and the gas outlet of said hydrogen chloride tail gas jar 1 is connected with the air inlet on one-level falling-film tower 2 tops; The discharging opening of one-level falling-film tower 2 lower ends connects circulating tank three 8-3, and the gas outlet of one-level falling-film tower 2 bottoms connects the air inlet on secondary falling-film tower 3 tops; The discharging opening of secondary falling-film tower 3 lower ends connects circulating tank two 8-2, and the gas outlet of secondary falling-film tower 3 bottoms connects the air inlet of three grades of packed tower 4 bottoms; The discharging opening of three grades of packed tower 4 lower ends connects circulating tank one 8-1, and the gas outlet of three grades of packed tower 4 upper ends connects vacuum buffer tank 5 air inlets; The gas outlet of vacuum buffer tank 5 connects the air inlet of water ring vacuum unit 6; One side of water ring vacuum unit 6 air inlets offers water inlet 6-1, and the discharging opening of water ring vacuum unit 6 connects the charging aperture of the charging aperture of circulating tank one 8-1, circulating tank two 8-2 and the charging aperture of circulating tank three 8-3 respectively; The discharging opening in circulating tank three 8-3 left side connects circulation finished product jar 9.
Said circulating tank one 8-1 right-hand member gas outlet is connected with pump one 7-1; Pump one 7-1 connects the air inlet of three grades of packed tower 4 upper right.
Said circulating tank two 8-2 right-hand member gas outlets are connected with pump two 7-2; Pump two 7-2 connect the air inlet of secondary falling-film tower 3 upper right.
Said circulating tank three 8-3 right-hand member gas outlets are connected with pump three 7-3; Pump three 7-3 connect the one-level falling-film tower (air inlet of upper right.
The hydrogen chloride gas that comes out from hydrogen chloride tail gas pipe 1; Entering into one-level falling-film tower 2 absorbs; The hydrochloric acid that absorbs is flow among circulating tank three 8-3 by discharging opening; Through pump three 7-3 the hydrochloric acid solution that absorbs among circulating tank three 8-3 is extracted back in the one-level falling-film tower 2; Carry out absorbing hydrogen chloride gas once more, the concentration of hydrochloric acid that enters into circulating tank three 8-3 after circulating with this will reach 30%; Entering into secondary falling-film tower 3 through one-level falling-film tower 2 unabsorbed hydrogen chloride gas along tracheae absorbs; Hydrochloric acid after the absorption enters into circulating pump 8-2 along discharging opening; Through pump two 7-2 the hydrochloric acid solution among circulating tank two 8-2 is withdrawn in the secondary falling-film tower 3 and absorbs once more, the concentration of hydrochloric acid solution among last circulating tank two 8-2 can reach 10%～30%; Entering into three grades of packed towers 4 through the residual hydrogen chloride gas in secondary falling-film tower 3 backs absorbs; The hydrochloric acid that makes after the absorption gets among circulating tank one 8-1 along discharging opening; Through pump one 7-1 the solution among circulating tank one 8-1 is drawn back in three grades of packed towers 4; The absorption that repeatedly circulates, the concentration of hydrochloric acid in last circulating tank one 8-1 can reach 5%～10%; The last a small amount of hydrogen chloride gas that comes out by three grades of packed tower 4 tops; Be drawn in the water ring vacuum unit 6 via vacuum buffer tank 5; By water inlet 6-1 water inlet absorbing hydrogen chloride gas; The hydrochloric acid that makes is returned respectively in circulating tank one 8-1, circulating tank two 8-2 and the circulating tank 8-3 again, enters into the absorption that circulates of corresponding falling-film tower and absorption tower.
Adopt this invention structure; Improved the rate of recovery of hydrogen chloride gas; Can reach hundred-percent recycling for the hydrogen chloride gas in the tail gas; And the quality and the content of hydrochloric acid have been improved; Concentration of hydrochloric acid can arrive 30%, and the hydrochloric acid of recovery can be as the acid-base titration agent raw material of products such as the raw material of producing the hydroxylamine hydrochloride product and sulfadimidine.Reduced the pollution of hydrogen chloride, need not add the treating apparatus of hydrogen chloride in the vent gas treatment, better promoted cleaner production, reduced the pollution treatment cost air.
Claims (4)
1. hydrogen chloride gas recirculation system; It is characterized in that: main body comprises hydrogen chloride tail gas jar (1), one-level falling-film tower (2), secondary falling-film tower (3) and three grades of packed towers (4) of installation arranged side by side, and the gas outlet of said hydrogen chloride tail gas jar (1) is connected with the air inlet on one-level falling-film tower (2) top; The discharging opening of one-level falling-film tower (2) lower end connects circulating tank three (8-3), and the gas outlet of one-level falling-film tower (2) bottom connects the air inlet on secondary falling-film tower (3) top; The discharging opening of secondary falling-film tower (3) lower end connects circulating tank two (8-2), and the gas outlet of secondary falling-film tower (3) bottom connects the air inlet of three grades of packed towers (4) bottom; The discharging opening of three grades of packed towers (4) lower end connects circulating tank one (8-1), and the gas outlet of three grades of packed towers (4) upper end connects vacuum buffer tank (5) air inlet; The gas outlet of vacuum buffer tank (5) connects the air inlet of water ring vacuum unit (6); One side of water ring vacuum unit (6) air inlet offers water inlet (6-1), and the discharging opening of water ring vacuum unit (6) connects the charging aperture of the charging aperture of circulating tank one (8-1), circulating tank two (8-2) and the charging aperture of circulating tank three (8-3) respectively; The discharging opening in circulating tank three (8-3) left side connects circulation finished product jar (9).
2. hydrogen chloride gas recirculation system according to claim 1 is characterized in that: said circulating tank one (8-1) right-hand member gas outlet is connected with pump one (7-1); Pump one (7-1) connects the air inlet of three grades of packed towers (4) upper right.
3. hydrogen chloride gas recirculation system according to claim 1 is characterized in that: said circulating tank two (8-2) right-hand member gas outlet is connected with pump two (7-2); Pump two (7-2) connects the air inlet of secondary falling-film tower (3) upper right.
4. hydrogen chloride gas recirculation system according to claim 1 is characterized in that: said circulating tank three (8-3) right-hand member gas outlet is connected with pump three (7-3); Pump three (7-3) connects the air inlet of one-level falling-film tower (2) upper right.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110110248A CN102302890A (en) | 2011-04-29 | 2011-04-29 | Hydrogen chloride gas circulating recovery system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110110248A CN102302890A (en) | 2011-04-29 | 2011-04-29 | Hydrogen chloride gas circulating recovery system |
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| CN102302890A true CN102302890A (en) | 2012-01-04 |
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| CN201110110248A Pending CN102302890A (en) | 2011-04-29 | 2011-04-29 | Hydrogen chloride gas circulating recovery system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104383789A (en) * | 2014-09-26 | 2015-03-04 | 大同市宇林德炭材料科技有限公司 | Industrial tail gas treatment complete equipment of carbon fiber reinforced graphite |
| CN105363321A (en) * | 2015-11-20 | 2016-03-02 | 太仓市振锋化工设备有限公司 | Hydrogen chloride gas absorption device |
| CN105435589A (en) * | 2015-11-12 | 2016-03-30 | 中国石油化工股份有限公司 | Hydrochloric acid recovery system and method for ship-loading operation |
| CN106621427A (en) * | 2016-12-08 | 2017-05-10 | 张贵 | Cold evaporation purifying system for by-product hydrochloric acid |
| CN108310912A (en) * | 2017-01-18 | 2018-07-24 | 湖北星火化工有限公司 | A kind of processing unit of hydrochloric acid tank tail gas |
| CN109295323A (en) * | 2018-11-07 | 2019-02-01 | 云南驰宏国际锗业有限公司 | A kind of method that closed circuit circulatory system Ti recovery distills germanium and hydrogen chloride in tail gas |
| CN109758874A (en) * | 2019-03-11 | 2019-05-17 | 崔立军 | A kind of environment-protective process purifying potassium sulfate production tail gas |
| CN110294458A (en) * | 2019-06-04 | 2019-10-01 | 利尔化学股份有限公司 | A kind of method and apparatus that alkyl dichloride phosphine synthesis by-product hydrogen chloride purifies online |
| CN110436721A (en) * | 2019-08-12 | 2019-11-12 | 江苏荣信环保科技有限公司 | A kind of metal surface pickling sludge and spent acid comprehensive processing technique |
| CN110642347A (en) * | 2019-09-27 | 2020-01-03 | 江苏荣信环保科技有限公司 | Method for preparing industrial flocculant from acid solution containing high iron, lead and zinc |
| CN111003917A (en) * | 2019-12-26 | 2020-04-14 | 江苏荣信环保科技有限公司 | Steel wire rope sludge and waste acid modular utilization device and process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201324588Y (en) * | 2008-12-08 | 2009-10-14 | 江阴苏利化学有限公司 | Hydrogen chloride gas absorption system |
| CN101648104A (en) * | 2008-08-13 | 2010-02-17 | 北京格瑞华阳科技发展有限公司 | Technology for reclaiming hydrogen chloride tail gas in chemical production |
| CN201711074U (en) * | 2010-06-12 | 2011-01-19 | 江苏大明科技有限公司 | Recovery system for tail gas produced by water treatment agent HEDP |
| CN202105563U (en) * | 2011-04-29 | 2012-01-11 | 苏州市吴赣药业有限公司 | Hydrogen chloride gas circulatory recovery system |
-
2011
- 2011-04-29 CN CN201110110248A patent/CN102302890A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101648104A (en) * | 2008-08-13 | 2010-02-17 | 北京格瑞华阳科技发展有限公司 | Technology for reclaiming hydrogen chloride tail gas in chemical production |
| CN201324588Y (en) * | 2008-12-08 | 2009-10-14 | 江阴苏利化学有限公司 | Hydrogen chloride gas absorption system |
| CN201711074U (en) * | 2010-06-12 | 2011-01-19 | 江苏大明科技有限公司 | Recovery system for tail gas produced by water treatment agent HEDP |
| CN202105563U (en) * | 2011-04-29 | 2012-01-11 | 苏州市吴赣药业有限公司 | Hydrogen chloride gas circulatory recovery system |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104383789A (en) * | 2014-09-26 | 2015-03-04 | 大同市宇林德炭材料科技有限公司 | Industrial tail gas treatment complete equipment of carbon fiber reinforced graphite |
| CN104383789B (en) * | 2014-09-26 | 2017-02-01 | 大同宇林德石墨设备股份有限公司 | Industrial tail gas treatment complete equipment of carbon fiber reinforced graphite |
| CN105435589A (en) * | 2015-11-12 | 2016-03-30 | 中国石油化工股份有限公司 | Hydrochloric acid recovery system and method for ship-loading operation |
| CN105363321A (en) * | 2015-11-20 | 2016-03-02 | 太仓市振锋化工设备有限公司 | Hydrogen chloride gas absorption device |
| CN106621427A (en) * | 2016-12-08 | 2017-05-10 | 张贵 | Cold evaporation purifying system for by-product hydrochloric acid |
| CN108310912A (en) * | 2017-01-18 | 2018-07-24 | 湖北星火化工有限公司 | A kind of processing unit of hydrochloric acid tank tail gas |
| CN109295323A (en) * | 2018-11-07 | 2019-02-01 | 云南驰宏国际锗业有限公司 | A kind of method that closed circuit circulatory system Ti recovery distills germanium and hydrogen chloride in tail gas |
| CN109758874A (en) * | 2019-03-11 | 2019-05-17 | 崔立军 | A kind of environment-protective process purifying potassium sulfate production tail gas |
| CN109758874B (en) * | 2019-03-11 | 2021-05-28 | 崔立军 | Environment-friendly process for purifying tail gas in potassium sulfate production |
| CN110294458A (en) * | 2019-06-04 | 2019-10-01 | 利尔化学股份有限公司 | A kind of method and apparatus that alkyl dichloride phosphine synthesis by-product hydrogen chloride purifies online |
| CN110436721A (en) * | 2019-08-12 | 2019-11-12 | 江苏荣信环保科技有限公司 | A kind of metal surface pickling sludge and spent acid comprehensive processing technique |
| CN110642347A (en) * | 2019-09-27 | 2020-01-03 | 江苏荣信环保科技有限公司 | Method for preparing industrial flocculant from acid solution containing high iron, lead and zinc |
| CN111003917A (en) * | 2019-12-26 | 2020-04-14 | 江苏荣信环保科技有限公司 | Steel wire rope sludge and waste acid modular utilization device and process |
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Application publication date: 20120104 |