CN103816776B - The reclaimer of tail gas and recovery method in a kind of glyphosate technicals production process - Google Patents
The reclaimer of tail gas and recovery method in a kind of glyphosate technicals production process Download PDFInfo
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- CN103816776B CN103816776B CN201410050781.5A CN201410050781A CN103816776B CN 103816776 B CN103816776 B CN 103816776B CN 201410050781 A CN201410050781 A CN 201410050781A CN 103816776 B CN103816776 B CN 103816776B
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- tail gas
- absorption tower
- triethylamine
- surge tank
- switch
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Abstract
The present invention relates to the reclaimer of tail gas in a kind of glyphosate technicals production process, triethylamine tail gas conveying pipeline is connected with surge tank, and surge tank is connected with absorption tower, and absorption tower is connected with surge tank after being connected with mother liquor vat again, forms closed circuit; Be connected with hydrogen chloride suction strainer groove after absorption tower is connected with centrifugal pump, hydrogen chloride suction strainer groove is connected with absorption tower again, forms closed circuit, is wherein also provided with frequency conversion fan between surge tank and absorption tower.Adopt the said equipment, utilize frequency conversion fan control system pressure to-0.8 ~-0.3mmhg.Utilize this Apparatus and method for reduce triethylamine unit consumption 0.1% in production process, bring larger social benefit simultaneously, thoroughly solve the emptying of triethylamine tail gas and watery hydrochloric acid waste problem, alleviate environmental protection pressure.
Description
Technical field
The present invention relates to a kind of glyphosate in process of production, the reclaimer of former medicine triethylamine tail gas and method for recovering tail gas, belong to chemical industry equipment and chemical technology field.
Background technology
In glyphosate technicals production process, triethylamine and hydrogen chloride are as raw material, poisonous.Existing triethylamine and hydrogen chloride tail gas poor processing effect, absorb not exclusively, often have the phenomenon of emptying, cause certain environmental pollution.In the production process of glyphosate technicals, triethylamine tail gas to be eliminated completely, at present the main difficult problem that there are following three aspects: 1, tail gas is difficult to collect, and is mainly manifested in 1) triethylamine has very strong permeability.2) exhaust pipe is longer, and gas is difficult to directly import absorption tower.2, how to select suitable absorbing liquid, the introducing of absorbing liquid can absorb tail gas fast, thus ensures that tail gas is not overflowed.3, how the Produced Liquid absorbing tail gas processes and not to cause secondary pollution.
Summary of the invention
For the problems referred to above, the invention provides equipment and the recovery method of a kind of triethylamine tail gas recycle utilization.Adopt aerodynamic principle, increase by 1 frequency conversion fan, strengthen draft, make to form tiny structure in triethylamine exhaust pipe, be more conducive to the collection of Triethylamine gas.
Be specially: the reclaimer of a kind of glyphosate production process Central Plains medicine tail gas, described tail gas comprises triethylamine tail gas and hydrochloric acid tail gas, triethylamine tail gas conveying pipeline is connected with surge tank, surge tank top is connected with bottom absorption tower, top, absorption tower is connected with surge tank bottom after being connected with mother liquor vat again, forms closed circuit; Be connected with hydrogen chloride suction strainer bottom land end again after top, absorption tower is connected with centrifugal pump, hydrogen chloride suction strainer groove top is connected with bottom, absorption tower, form closed circuit, also be provided with frequency conversion fan between described surge tank and absorption tower, described triethylamine tail gas conveying pipeline is also connected with the multistage crystallization still of parallel connection.
Also be provided with frequency conversion fan between described surge tank and absorption tower, before and after blower fan, pneumatic control valve be housed.
Described triethylamine tail gas conveying pipeline is also connected with the multistage crystallization still of parallel connection.
The multistage crystallization still of described parallel connection is at least 2 crystallization kettles.
Utilize the rubber stopper of suitable dimension, ensure crystallization kettle sealing.
Described triethylamine tail gas conveying pipeline is arranged with bypass line, is provided with switch before each equipment.
Adopt tail gas recovery device in glyphosate technicals production process to reclaim a method for tail gas, open the switch before and after frequency conversion fan, steady pressure; Open the switch between switch between triethylamine tail gas conveying pipeline to surge tank and gas buffer tank to mother liquor vat again, triethylamine tail gas is delivered to surge tank and after stablizing source of the gas, be evacuated to absorption tower through frequency conversion fan, stablize the pressure between triethylamine tail gas conveying pipeline to absorption tower; Open the switch between mother liquor vat to centrifugal pump further successively, switch between centrifugal pump to hydrogen chloride suction strainer groove, hydrogen chloride is evacuated to hydrogen chloride suction strainer groove from mother liquor vat, then hydrogen chloride is passed into absorption tower through hydrogen chloride suction strainer groove, synthesis triethylamine hydrochloride.
The described switch opened before and after frequency conversion fan, the pressure of systems stabilisation is to-0.8 ~-0.3mmhg; Open the switch between triethylamine tail gas conveying pipeline to the switch, absorption tower to centrifugal pump of surge tank further, in systems stabilisation, pressure is to-0.8 ~-0.3mmhg.
Open the switch before and after frequency conversion fan further, the pressure of systems stabilisation is to-0.7 ~-0.5mmhg; Open the switch between triethylamine tail gas conveying pipeline to the switch, absorption tower to centrifugal pump of surge tank further, in systems stabilisation, pressure is to-0.6 ~-0.5mmhg.
For the ease of gas collection in the present invention, before absorption tower, after surge tank, set up a small-sized variable-frequency blower fan, to ensure system tiny structure, guarantee that Triethylamine gas reclaims completely.Then the feature of acid-base neutralization is utilized, adopt the useless rare hydrogen chloride produced in production process to absorb process fast, form the triethylamine hydrogen chloride salt that stability is stronger, finally enter triethylamine recovery system and reclaim triethylamine, used for synthesis, form an endless-chain.Triethylamine unit consumption can not only be reduced like this, and can well eliminate triethylamine tail gas and hydrogen chloride tail gas, significantly reduce the environmental pollution because tail gas absorption not exclusively brings.
Consider that tail gas is alkaline gas, absorbing liquid adopts the lower feed liquid of hydrogen chloride absorption tower to carry out cyclic absorption, can ensure the Appropriate application of resource like this.After liquid to be absorbed reaches capacity, after absorbing liquid extraction being entered mother liquor vat, carry out triethylamine recovery.
Adopt technical scheme of the present invention can reduce triethylamine unit consumption 0.1% in production process, the social benefit simultaneously brought, thoroughly solve triethylamine tail gas emptying and watery hydrochloric acid waste, alleviate environmental protection pressure.
Accompanying drawing explanation
Fig. 1 is the reclaimer figure of glyphosate production process Central Plains medicine tail gas, wherein, and 1. triethylamine tail gas conveying pipeline, 2. surge tank, 3. absorption tower, 4. mother liquor vat, 5. centrifugal pump, 6. hydrogen chloride suction strainer groove, 7. crystallization kettle, 8. frequency conversion fan.
1, gas buffer tank to ensure stablizing of source of the gas, and partial condensation liquid can directly enter mother liquor vat, guarantees that the low-lying place of pipeline does not produce fluid-tight.
2, increasing frequency conversion fan is to ensure that system has stable tiny structure, guarantees that gas introduces absorption tower completely.
3, absorption tower is packed absorber, can prevent triethylamine hydrochloride from separating out stifled tower.
4, do absorbing liquid with diluted acid, the Produced Liquid entering mother liquor vat can be made in acid, liquid caustic soda may be consumed at recovery stage.But amount is few, and liquid caustic soda consumption can not be made to have larger fluctuation.
5, all tail gas sources pipeline need add branch road, prevents recovery system fault, causes production system to build the pressure.
Detailed description of the invention
Embodiment 1
The reclaimer of a kind of glyphosate production process Central Plains medicine tail gas, described former medicine tail gas comprises triethylamine former medicine tail gas and the former medicine tail gas of hydrogen chloride, triethylamine tail gas conveying pipeline 1 is connected with surge tank 2, surge tank 2 top is connected with bottom absorption tower 3, be connected with surge tank 2 bottom again after top, absorption tower 3 is connected with mother liquor vat 4, form closed circuit; Be connected with hydrogen chloride suction strainer groove 6 bottom after top, absorption tower 3 is connected with centrifugal pump 5, hydrogen chloride suction strainer groove 6 top is connected with bottom, absorption tower 3 again, forms closed circuit.
Also be provided with frequency conversion fan 8 between described surge tank 2 and absorption tower 4, before and after blower fan, pneumatic control valve be housed.
Described triethylamine tail gas conveying pipeline 1 is also connected with the multistage crystallization still 7 of parallel connection.
The multistage crystallization still 7 of described parallel connection is at least 2 crystallization kettles 7 parallel connections.
Described triethylamine tail gas conveying pipeline 1 is arranged with bypass line, is provided with switch before each equipment.
Open the switch before and after frequency conversion fan 8, steady pressure; Open the switch between switch between triethylamine tail gas conveying pipeline 1 to surge tank 2 and gas buffer tank 2 to mother liquor vat 4 again, triethylamine tail gas is delivered to surge tank 2 and after stablizing source of the gas, be evacuated to absorption tower 3 through frequency conversion fan 8, stablize the pressure between triethylamine tail gas conveying pipeline 1 to absorption tower 3; Open the switch between mother liquor vat 4 to centrifugal pump 5 further successively, switch between centrifugal pump 5 to hydrogen chloride suction strainer groove 6, hydrogen chloride is evacuated to hydrogen chloride suction strainer groove 6 from mother liquor vat 5, then hydrogen chloride is passed into absorption tower 3 through hydrogen chloride suction strainer groove 6, synthesis triethylamine hydrochloride.
The described switch opened before and after frequency conversion fan 8, the pressure of systems stabilisation is to-0.8 ~-0.3mmhg; Open the switch between the switch of triethylamine tail gas conveying pipeline 1 to surge tank 2, absorption tower 3 to centrifugal pump 5 further, in systems stabilisation, pressure is to-0.8 ~-0.3mmhg.
Open the switch before and after frequency conversion fan 8 further, the pressure of systems stabilisation is to-0.7 ~-0.5mmhg; Open the switch between the switch of triethylamine tail gas conveying pipeline 1 to surge tank 2, absorption tower 3 to centrifugal pump 5 further, in systems stabilisation, pressure is to-0.6 ~-0.5mmhg.
Claims (5)
1. adopt tail gas recovery device in glyphosate technicals production process to reclaim a method for tail gas, it is characterized in that: open the switch before and after frequency conversion fan (8), steady pressure; Open the switch between switch between triethylamine tail gas conveying pipeline (1) to surge tank (2) and gas buffer tank (2) to mother liquor vat (4) again, triethylamine tail gas is delivered to surge tank (2) and after stablizing source of the gas, be evacuated to absorption tower (3) through frequency conversion fan (8), stablize the pressure between triethylamine tail gas conveying pipeline (1) to absorption tower (3); Open the switch between mother liquor vat (4) to centrifugal pump (5) further successively, switch between centrifugal pump (5) to hydrogen chloride suction strainer groove (6), hydrogen chloride is evacuated to hydrogen chloride suction strainer groove (6) from mother liquor vat (5), again hydrogen chloride is passed into absorption tower (3) through hydrogen chloride suction strainer groove (6), synthesis triethylamine hydrochloride;
The reclaimer of tail gas in described glyphosate technicals production process, tail gas comprises triethylamine tail gas and hydrochloric acid tail gas, triethylamine tail gas conveying pipeline (1) is connected with surge tank (2), surge tank (2) top is connected with absorption tower (3) bottom, absorption tower (3) top is connected with surge tank (2) bottom after being connected with mother liquor vat (4) again, forms closed circuit; Absorption tower (3) top is connected with hydrogen chloride suction strainer groove (6) bottom after being connected with centrifugal pump (5) again, hydrogen chloride suction strainer groove (6) top is connected with absorption tower (3) bottom, form closed circuit, also be provided with frequency conversion fan (8) between described surge tank (2) and absorption tower (3), described triethylamine tail gas conveying pipeline (1) is also connected with the multistage crystallization still (7) of parallel connection.
2. in employing glyphosate technicals production process according to claim 1, tail gas recovery device reclaims the method for tail gas, it is characterized in that: open the switch before and after frequency conversion fan (8), and the pressure of systems stabilisation is to-0.8 ~-0.3mmhg; Open the switch between triethylamine tail gas conveying pipeline (1) to the switch, absorption tower (3) to centrifugal pump (5) of surge tank (2) further, in systems stabilisation, pressure is to-0.8 ~-0.3mmhg.
3. in employing glyphosate technicals production process according to claim 2, tail gas recovery device reclaims the method for tail gas, it is characterized in that: open the switch before and after frequency conversion fan (8), and the pressure of systems stabilisation is to-0.7 ~-0.5mmhg; Open the switch between triethylamine tail gas conveying pipeline (1) to the switch, absorption tower (3) to centrifugal pump (5) of surge tank (2) further, in systems stabilisation, pressure is to-0.6 ~-0.5mmhg.
4. in employing glyphosate technicals production process according to claim 1, tail gas recovery device reclaims the method for tail gas, it is characterized in that: the multistage crystallization still (7) of described parallel connection is at least 2 crystallization kettles (7) parallel connections.
5. in employing glyphosate technicals production process according to claim 1, tail gas recovery device reclaims the method for tail gas, it is characterized in that: triethylamine tail gas conveying pipeline (1) is arranged with bypass line, is provided with switch before each equipment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410050781.5A CN103816776B (en) | 2014-02-14 | 2014-02-14 | The reclaimer of tail gas and recovery method in a kind of glyphosate technicals production process |
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| CN201410050781.5A CN103816776B (en) | 2014-02-14 | 2014-02-14 | The reclaimer of tail gas and recovery method in a kind of glyphosate technicals production process |
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| CN103816776A CN103816776A (en) | 2014-05-28 |
| CN103816776B true CN103816776B (en) | 2015-12-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105013279B (en) * | 2015-07-13 | 2017-01-18 | 湖北泰盛化工有限公司 | Triethylamine tail gas and hydrochloric acid mist comprehensive treatment device |
| CN115025608A (en) * | 2022-05-12 | 2022-09-09 | 湖北泰盛化工有限公司 | Device and process for controlling tail gas odor in production of glyphosate isopropylamine salt water aqua |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201949783U (en) * | 2010-12-30 | 2011-08-31 | 荆州市江汉精细化工有限公司 | Chlorine hydride tail gas absorber |
| CN202129011U (en) * | 2011-05-24 | 2012-02-01 | 江苏托球农化有限公司 | Tail gas absorbing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1199921C (en) * | 2002-07-23 | 2005-05-04 | 浙江新安化工集团股份有限公司 | Technique for cleanly recovering byproduct methyl chloride of glyphosate acid |
| CN101337861B (en) * | 2007-12-26 | 2011-10-05 | 浙江新安化工集团股份有限公司 | Method for purifying and recovering methyl chloride of glyphosate byproduct |
| KR100966481B1 (en) * | 2008-01-29 | 2010-06-29 | 한국에너지기술연구원 | Continuous concentrating system and method of volatile organic compounds using moving-bed reactor |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201949783U (en) * | 2010-12-30 | 2011-08-31 | 荆州市江汉精细化工有限公司 | Chlorine hydride tail gas absorber |
| CN202129011U (en) * | 2011-05-24 | 2012-02-01 | 江苏托球农化有限公司 | Tail gas absorbing device |
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