CN103816776A - Recycling equipment for tail gas generated during glyphosate technical production process and recycling method - Google Patents
Recycling equipment for tail gas generated during glyphosate technical production process and recycling method Download PDFInfo
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- CN103816776A CN103816776A CN201410050781.5A CN201410050781A CN103816776A CN 103816776 A CN103816776 A CN 103816776A CN 201410050781 A CN201410050781 A CN 201410050781A CN 103816776 A CN103816776 A CN 103816776A
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- tail gas
- triethylamine
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Abstract
The invention relates to recycling equipment for tail gas generated during the glyphosate technical production process. A triethylamine tail gas conveying pipeline is connected to a buffer tank, the buffer tank is connected to an absorbing tower, the absorbing tower is connected to a big mother liquid groove and then connected to the buffer tank so as to form a circulation circuit; the absorbing tower is connected to a centrifugal pump and then connected to a hydrogen chloride suction groove, then the hydrogen chloride suction groove is connected to the absorbing tower so as to form a circulation circuit; and a variable frequency wind turbine is arranged between the buffer tank and the absorbing tower. The variable frequency wind turbine can control the system pressure of the equipment in a range of -0.8 to -0.3 mmhg. The equipment and method can reduce the consumption amount of triethylamine by 0.1% during the production process, generate a great social benefit, radically solves the problems of direct discharging of triethylamine tail gas into the atmosphere and dilute hydrochloric acid waste, and relieve the environmental pressure.
Description
Technical field
The present invention relates to a kind of glyphosate in process of production, reclaimer and the method for recovering tail gas of former medicine triethylamine 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 has the phenomenon of emptying, caused certain environmental pollution.In the production process of glyphosate technicals, eliminate triethylamine tail gas completely, at present a main difficult problem that has following three aspects:: 1, tail gas is difficult to collection, 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, the suitable absorption liquid of How to choose, the introducing of absorption liquid can absorb tail gas fast, thus assurance tail gas is not overflowed.3, how the Produced Liquid that has absorbed tail gas is processed and is not caused secondary pollution.
Summary of the invention
For the problems referred to above, the invention provides equipment and recovery method that a kind of triethylamine tail gas recycle is utilized.Adopt aerodynamic principle, increase by 1 frequency conversion fan, strengthen draft, make to form micro-negative pressure 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 the former medicine tail gas of triethylamine and the former medicine tail gas of hydrogen chloride, 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; Top, absorption tower is connected with hydrogen chloride suction strainer bottom land end after being connected with centrifugal pump again, and hydrogen chloride suction strainer groove top is connected with bottom, absorption tower, forms closed circuit.
Between described surge tank and absorption tower, be also provided with frequency conversion fan, pneumatic control valve is housed before and after blower fan.
Described triethylamine tail gas conveying pipeline is also connected with multistage crystallization still in parallel.
Described multistage crystallization still in parallel is at least 2 crystallization kettles.
Utilize the rubber stopper of suitable dimension, guarantee crystallization kettle sealing.
Described triethylamine tail gas conveying pipeline is arranged with bypass line, before each equipment, is provided with switch.
Adopt a method for tail gas recovery device recovery tail gas in glyphosate technicals production process, open the switch of frequency conversion fan front and back, steady pressure; Open again triethylamine tail gas conveying pipeline to the switch between surge tank and gas buffer tank to the switch between mother liquor vat, triethylamine tail gas is delivered to surge tank and stablizes after source of the gas, be evacuated to absorption tower through frequency conversion fan, stablize triethylamine tail gas conveying pipeline to the pressure between absorption tower; Further open successively mother liquor vat to the switch between centrifugal pump, centrifugal pump is to the switch between 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, synthetic triethylamine hydrochloride.
The described switch of opening frequency conversion fan front and back, the pressure of systems stabilisation is to-0.8 ~-0.3mmhg; Further open triethylamine tail gas conveying pipeline to the switch of surge tank, absorption tower to the switch between centrifugal pump, systems stabilisation internal pressure is to-0.8 ~-0.3mmhg.
Further open the switch of frequency conversion fan front and back, the pressure of systems stabilisation is to-0.7 ~-0.5mmhg; Further open triethylamine tail gas conveying pipeline to the switch of surge tank, absorption tower to the switch between centrifugal pump, systems stabilisation internal pressure is to-0.6 ~-0.5mmhg.
In the present invention, for the ease of gas collection, before absorption tower, after surge tank, set up a small-sized variable-frequency blower fan, with the micro-negative pressure of assurance system, guarantee that Triethylamine gas reclaims completely.Then utilize the feature of acid-base neutralization, adopt the useless rare hydrogen chloride producing in production process to carry out absorbing and processing fast, form the stronger triethylamine hydrogen chloride salt of stability, finally enter triethylamine recovery system and reclaim triethylamine, used for synthesis, form an endless-chain.Can not only reduce like this triethylamine unit consumption, and can well eliminate triethylamine tail gas and hydrogen chloride tail gas, greatly alleviate the environmental pollution not exclusively bringing because of tail gas absorption.
Consider that tail gas is alkaline gas, absorption liquid adopts the absorption that circulates of the lower feed liquid of hydrogen chloride absorption tower, can guarantee so the reasonable utilization of resource.After liquid to be absorbed reaches capacity, after being entered to mother liquor vat, absorption liquid extraction carries out triethylamine recovery.
Adopt technical scheme of the present invention can reduce triethylamine unit consumption 0.1% in production process, the social benefit of simultaneously bringing, thoroughly solves the emptying of triethylamine tail gas and watery hydrochloric acid waste, has alleviated 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 is can guarantee source of the gas stable, 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 guarantee that system has stable micro-negative pressure, guarantees that gas introduces absorption tower completely.
3, absorption tower is packed absorber, can prevent that triethylamine hydrochloride from separating out stifled tower.
4, do absorption liquid with diluted acid, can make the Produced Liquid that enters mother liquor vat be acid, may consume liquid caustic soda at recovery stage.But amount is few, can not make liquid caustic soda consumption have larger fluctuation.
5, all tail gas source pipeline need add branch road, prevents recovery system fault, causes production system to build the pressure.
The specific embodiment
The reclaimer of a kind of glyphosate production process Central Plains medicine tail gas, described former medicine tail gas comprises the former medicine tail gas of triethylamine and the former medicine tail gas of hydrogen chloride, triethylamine tail gas conveying pipeline 1 is connected with surge tank 2, surge tank 2 tops are connected with 3 bottoms, absorption tower, 3 tops, absorption tower are connected with surge tank 2 bottoms after being connected with mother liquor vat 4 again, form closed circuit; 3 tops, absorption tower are connected with hydrogen chloride suction strainer groove 6 bottoms after being connected with centrifugal pump 5 again, and hydrogen chloride suction strainer groove 6 tops are connected with 3 bottoms, absorption tower, form closed circuit.
Between described surge tank 2 and absorption tower 4, be also provided with frequency conversion fan 8, pneumatic control valve is housed before and after blower fan.
Described triethylamine tail gas conveying pipeline 1 is also connected with multistage crystallization still 7 in parallel.
Described multistage crystallization still 7 in parallel is at least 2 crystallization kettle 7 parallel connections.
Described triethylamine tail gas conveying pipeline 1 is arranged with bypass line, before each equipment, is provided with switch.
Open the switch of frequency conversion fan 8 front and back, steady pressure; Open again triethylamine tail gas conveying pipeline 1 to the switch between surge tank 2 and gas buffer tank 2 to the switch between mother liquor vat 4, triethylamine tail gas is delivered to surge tank 2 and stablizes after source of the gas, be evacuated to absorption tower 3 through frequency conversion fan 8, stablize triethylamine tail gas conveying pipeline 1 to the pressure between absorption tower 3; Further open successively the switch of mother liquor vat 4 to 5 of centrifugal pumps, centrifugal pump 5 is to the switch between 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, synthetic triethylamine hydrochloride.
The described switch of opening frequency conversion fan 7 front and back, the pressure of systems stabilisation is to-0.8 ~-0.3mmhg; Further open triethylamine tail gas conveying pipeline 1 to the switch of surge tank 2, absorption tower 3 to the switch between centrifugal pump 5, systems stabilisation internal pressure is to-0.8 ~-0.3mmhg.
Further open the switch of frequency conversion fan 7 front and back, the pressure of systems stabilisation is to-0.7 ~-0.5mmhg; Further open triethylamine tail gas conveying pipeline 1 to the switch of surge tank 2, absorption tower 3 to the switch between centrifugal pump 5, systems stabilisation internal pressure is to-0.6 ~-0.5mmhg.
Claims (8)
1. the reclaimer of tail gas in a glyphosate technicals production process, described tail gas comprises triethylamine tail gas and hydrochloric acid tail gas, it is characterized in that: triethylamine tail gas conveying pipeline (1) is connected with surge tank (2), surge tank (2) top is connected with absorption tower (3) bottom, top, absorption tower (3) is connected with surge tank (2) bottom after being connected with mother liquor vat (4) again, forms closed circuit; Top, absorption tower (3) is connected with hydrogen chloride suction strainer groove (6) bottom after being connected with centrifugal pump (5) again, and hydrogen chloride suction strainer groove (6) top is connected with bottom, absorption tower (3), forms closed circuit.
2. the reclaimer of tail gas in glyphosate technicals production process according to claim 1, is characterized in that: between described surge tank (2) and absorption tower (4), be also provided with frequency conversion fan (8).
3. the reclaimer of tail gas in glyphosate technicals production process according to claim 1, is characterized in that: described triethylamine tail gas conveying pipeline (1) is also connected with multistage crystallization still (7) in parallel.
4. the reclaimer of tail gas in glyphosate technicals production process according to claim 3, is characterized in that: described multistage crystallization still (7) in parallel is at least 2 crystallization kettles (7) parallel connection.
5. the reclaimer of tail gas in glyphosate technicals production process according to claim 1, is characterized in that: triethylamine tail gas conveying pipeline (1) is arranged with bypass line, before each equipment, is provided with switch.
6. a method that adopts tail gas recovery device recovery tail gas in glyphosate technicals production process, is characterized in that: open the switch of frequency conversion fan (8) front and back, steady pressure; Open again triethylamine tail gas conveying pipeline (1) to the switch between surge tank (2) and gas buffer tank (2) to the switch between mother liquor vat (4), triethylamine tail gas is delivered to surge tank (2) and stablizes after source of the gas, be evacuated to absorption tower (3) through frequency conversion fan (8), stablize triethylamine tail gas conveying pipeline (1) to the pressure between absorption tower (3); Further open successively mother liquor vat (4) to the switch between centrifugal pump (5), centrifugal pump (5) is to the switch between 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 to absorption tower (3) through hydrogen chloride suction strainer groove (6), synthetic triethylamine hydrochloride.
7. the method for tail gas recovery device recovery tail gas in employing glyphosate technicals production process according to claim 6, is characterized in that: open the switch of frequency conversion fan (7) front and back, the pressure of systems stabilisation is to-0.8 ~-0.3mmhg; Further open triethylamine tail gas conveying pipeline (1) to the switch of surge tank (2), absorption tower (3) to the switch between centrifugal pump (5), systems stabilisation internal pressure is to-0.8 ~-0.3mmhg.
8. the method for tail gas recovery device recovery tail gas in employing glyphosate technicals production process according to claim 7, is characterized in that: open the switch of frequency conversion fan (7) front and back, the pressure of systems stabilisation is to-0.7 ~-0.5mmhg; Further open triethylamine tail gas conveying pipeline (1) to the switch of surge tank (2), absorption tower (3) to the switch between centrifugal pump (5), systems stabilisation internal pressure is to-0.6 ~-0.5mmhg.
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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 true CN103816776A (en) | 2014-05-28 |
| CN103816776B CN103816776B (en) | 2015-12-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105013279A (en) * | 2015-07-13 | 2015-11-04 | 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 (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1446782A (en) * | 2002-07-23 | 2003-10-08 | 浙江新安化工集团股份有限公司 | Technique for cleanly recovering byproduct methyl chloride of glyphosate acid |
| CN101337861A (en) * | 2007-12-26 | 2009-01-07 | 浙江新安化工集团股份有限公司 | Method for purifying and recovering methyl chloride of glyphosate byproduct |
| US20090188387A1 (en) * | 2008-01-29 | 2009-07-30 | Korea Institute Of Energy Research | Continuous concentration system and method for volatile organic compounds using moving-bed reactor |
| 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 |
-
2014
- 2014-02-14 CN CN201410050781.5A patent/CN103816776B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1446782A (en) * | 2002-07-23 | 2003-10-08 | 浙江新安化工集团股份有限公司 | Technique for cleanly recovering byproduct methyl chloride of glyphosate acid |
| CN101337861A (en) * | 2007-12-26 | 2009-01-07 | 浙江新安化工集团股份有限公司 | Method for purifying and recovering methyl chloride of glyphosate byproduct |
| US20090188387A1 (en) * | 2008-01-29 | 2009-07-30 | Korea Institute Of Energy Research | Continuous concentration system and method for volatile organic compounds using moving-bed reactor |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105013279A (en) * | 2015-07-13 | 2015-11-04 | 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 |
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| CN103816776B (en) | 2015-12-02 |
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