CN201214026Y - Tail-gas recovery device - Google Patents

Tail-gas recovery device Download PDF

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Publication number
CN201214026Y
CN201214026Y CNU2008201050027U CN200820105002U CN201214026Y CN 201214026 Y CN201214026 Y CN 201214026Y CN U2008201050027 U CNU2008201050027 U CN U2008201050027U CN 200820105002 U CN200820105002 U CN 200820105002U CN 201214026 Y CN201214026 Y CN 201214026Y
Authority
CN
China
Prior art keywords
tail gas
condenser
heat exchanger
vacuum pump
storage tank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CNU2008201050027U
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Chinese (zh)
Inventor
王士玉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HUAIAN JIACHENG HI-TECH CHEMICAL INDUSTRY Co Ltd
Original Assignee
HUAIAN JIACHENG HI-TECH CHEMICAL INDUSTRY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HUAIAN JIACHENG HI-TECH CHEMICAL INDUSTRY Co Ltd filed Critical HUAIAN JIACHENG HI-TECH CHEMICAL INDUSTRY Co Ltd
Priority to CNU2008201050027U priority Critical patent/CN201214026Y/en
Application granted granted Critical
Publication of CN201214026Y publication Critical patent/CN201214026Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a tail gas reclaiming device which comprises a hydraulic ring type vacuum pump (7), a heat exchanger (6), a storage tank (5), a filling tower (4), a liquid distributor (3), a condenser (2) and a circulating pump (1), wherein the upper part of the storage tank (5) is provided with the filling tower (4); the upper part of the filling tower (4) is provided with the condenser (2) through the liquid distributor (3); the storage tank (5) and the hydraulic ring type vacuum pump (7) are communicated with the heat exchanger (6) through pipelines; and the circulating pump (1) is communicated with the storage tank (5) and the condenser (2) through the pipelines. When the tail gas reclaiming device is adopted, firstly, tail gas after vacuum rectification is preliminarily absorbed through the hydraulic ring type vacuum pump; secondly, the tail gas passes through the heat exchanger, the filling tower and the condenser sequentially under the normal atmosphere; and finally, the tail gas reaches the standard and is discharged. Therefore, the tail gas reclaiming device improves the product yield, reduces production cost, improves the competitiveness of products in enterprises, greatly reduces the emission amount of hazardous substances in the tail gas, and has obvious economic and social benefits.

Description

Device for recovering tail gas
Technical field
The utility model relates to a kind of device for recovering tail gas, is applicable to reclaim the tail gas that produces in the rectification under vacuum process.
Background technology
Rectification under vacuum is used for high boiling substance or the separation of heat-sensitive substance is purified.But in whole system, often contain a small amount of low-boiling point material, these materials are again the primary raw material produced or useful product, byproduct.Its common feature is that boiling point is low, and its partial vapour pressure is higher relatively under the temperature of rectifying, be difficult to get off by the whole condensations of overhead condenser, but these materials solubility in the high boiling substance in system is bigger.Such as with toluene (or chlorobenzene) nitrated production nitrotoleune (or nitro-chlorobenzene), always contain a small amount of unreacted toluene (or chlorobenzene) completely in the reactant liquor.These unreacted matters rate of recovery in the rectification under vacuum process is lower, and this not only wastes valuable raw material, simultaneously environment is polluted.
Summary of the invention
The utility model purpose is: a kind of device for recovering tail gas is provided, and this retracting device can reclaim the low-boiling point material in the rectification under vacuum tail gas more fully, improves product yield, cuts down the consumption of raw materials.
Technical solution principle of the present utility model is: add a tail gas absorber at vacuum pump outlet, under lower temperature, utilize the eutectic oil of boiling point high product to absorb low-boiling point material, reduce discharging by the dividing potential drop that reduces low-boiling point material, at last add a condenser at the top on absorption tower again, utilize chilled brine further to reclaim low-boiling point material in the tail gas.
Technical solution of the present utility model is: this retracting device comprises liquid-ring vacuum pump, heat exchanger, basin, packed tower, liquid distribution trough, condenser and circulating pump, packed tower is installed above basin, condenser is installed by liquid distribution trough in the top of packed tower, basin is communicated with heat exchanger by pipeline, liquid-ring vacuum pump is communicated with heat exchanger by pipeline, and circulating pump is communicated with basin and condenser by pipeline.
During installation, liquid-ring vacuum pump and circulating pump are communicated with rectification under vacuum two coolers by pipeline respectively; During use, tail gas from rectification under vacuum two coolers is tentatively delivered to heat exchanger after the absorption by liquid-ring vacuum pump, circulation fluid (eutectic oil) to liquid-ring vacuum pump in heat exchanger cools off, and simultaneously the low-boiling point material in the tail gas is carried out preliminary condensation; The eutectic oil counter current contacting that the gas that comes out from heat exchanger gets off through basin distributor bottom-up and from packed tower at the bottom of the packed tower, low-boiling point material in the gas is absorbed by high boiling eutectic oil, the gas that comes out from packed tower after condenser by emptying after the further condensation of chilled brine, eutectic oil circulates by circulating pump, controls the wherein content of low-boiling point material simultaneously; The method of its control is such, and the inlet amount of the fresh eutectic oil by regulating basin and the produced quantity of circulating-pump outlet eutectic oil realize, returns the rectification under vacuum systemic circulation from the eutectic oil of circulating-pump outlet extraction.
The utility model at first tentatively absorbs through liquid-ring vacuum pump the tail gas of rectification under vacuum, then under normal pressure successively through over-heat-exchanger, packed tower, condenser, last qualified discharge, so not only improved product yield, reduce production costs, improve the competitiveness of enterprise product, significantly reduced emission of harmful substances amount in the tail gas simultaneously, have tangible economic and social benefit, the professional need not performing creative labour according to technical solutions of the utility model and changes a little and can be widely used in rectification under vacuum, multiple fields such as the extractant recovery in solvent recovery and the extraction process.
Description of drawings
Fig. 1 is a structural principle flow chart of the present utility model.
Among the figure: 1 is that circulating pump, 2 is that condenser, 3 is that liquid distribution trough, 4 is that packed tower, 5 is that basin, 6 heat exchangers, 7 are that liquid-ring vacuum pump, 8 is rectification under vacuum two coolers.
The specific embodiment
As shown in Figure 1, this retracting device comprises liquid-ring vacuum pump 7, heat exchanger 6, basin 5, packed tower 4, liquid distribution trough 3, condenser 2 and circulating pump 1, packed tower 4 is installed above basin 5, condenser 2 is installed by liquid distribution trough 3 in the top of packed tower 4, basin 5 is communicated with heat exchanger 6 by pipeline, and liquid-ring vacuum pump 7 is communicated with heat exchanger 6 by pipeline, and circulating pump 1 is communicated with basin 5 and condenser 2 by pipeline.
During installation, liquid-ring vacuum pump 7 and circulating pump 1 are communicated with rectification under vacuum two coolers 8 by pipeline respectively; Tail gas from rectification under vacuum two coolers 8 is tentatively delivered to heat exchanger 6 after the absorption by liquid-ring vacuum pump 7, circulation fluid (eutectic oil) to liquid-ring vacuum pump 7 in heat exchanger 6 cools off, and simultaneously the low-boiling point material in the tail gas is carried out preliminary condensation; The eutectic oil counter current contacting that the gas distributor 3 bottom-up from 4 ends of packed tower through basin 5 and from packed tower 4 that comes out from heat exchanger 6 gets off, low-boiling point material in the gas is absorbed by high boiling eutectic oil, the gas that comes out from packed tower after condenser 2 by emptying after the further condensation of chilled brine, eutectic oil circulates by circulating pump 1, controls the wherein content of low-boiling point material simultaneously; The method of its control is such, and the inlet amount of the fresh eutectic oil by regulating basin 5 and the produced quantity of circulating pump 1 outlet eutectic oil realize, returns the rectification under vacuum systemic circulation from the eutectic oil of circulating pump 1 outlet extraction.

Claims (1)

1. device for recovering tail gas, it is characterized in that: this retracting device comprises liquid-ring vacuum pump (7), heat exchanger (6), basin (5), packed tower (4), liquid distribution trough (3), condenser (2) and circulating pump (1), packed tower (4) is installed in top at basin (5), condenser (2) is installed by liquid distribution trough (3) in the top of packed tower (4), basin (5) is communicated with heat exchanger (6) by pipeline, liquid-ring vacuum pump (7) is communicated with heat exchanger (6) by pipeline, and circulating pump (1) is communicated with basin (5) and condenser (2) by pipeline.
CNU2008201050027U 2008-04-03 2008-04-03 Tail-gas recovery device Expired - Fee Related CN201214026Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2008201050027U CN201214026Y (en) 2008-04-03 2008-04-03 Tail-gas recovery device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2008201050027U CN201214026Y (en) 2008-04-03 2008-04-03 Tail-gas recovery device

Publications (1)

Publication Number Publication Date
CN201214026Y true CN201214026Y (en) 2009-04-01

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2008201050027U Expired - Fee Related CN201214026Y (en) 2008-04-03 2008-04-03 Tail-gas recovery device

Country Status (1)

Country Link
CN (1) CN201214026Y (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102836618A (en) * 2012-08-15 2012-12-26 清华大学 Treating device for tail gas
CN103550940A (en) * 2013-11-08 2014-02-05 福建中科宏业化工科技有限公司 Crude product light component removal and catalyst separation device for propylene carbonate (PC)
CN105333722A (en) * 2015-12-10 2016-02-17 无锡爱德旺斯科技有限公司 High temperature waste gas heat and coating material recovery device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102836618A (en) * 2012-08-15 2012-12-26 清华大学 Treating device for tail gas
CN103550940A (en) * 2013-11-08 2014-02-05 福建中科宏业化工科技有限公司 Crude product light component removal and catalyst separation device for propylene carbonate (PC)
CN105333722A (en) * 2015-12-10 2016-02-17 无锡爱德旺斯科技有限公司 High temperature waste gas heat and coating material recovery device
CN105333722B (en) * 2015-12-10 2017-06-16 无锡爱德旺斯科技有限公司 High-temp waste gas waste heat and coating material retracting device

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C14 Grant of patent or utility model
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DD01 Delivery of document by public notice

Addressee: Huaian Jiacheng Hi-Tech Chemical Industry Co., Ltd.

Document name: Notification to Pay the Fees

DD01 Delivery of document by public notice

Addressee: Huaian Jiacheng Hi-Tech Chemical Industry Co., Ltd.

Document name: Notification of Termination of Patent Right

CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20090401

Termination date: 20160403

CF01 Termination of patent right due to non-payment of annual fee