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Environment-friendly device for recycling and treating solvents in tail gas

An environmental protection device and tail gas technology, which is applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve the problem that the recovery speed and recovery rate of effective components cannot be balanced, and achieve ideal solvent recovery rate, waste prevention, and operation control Various and flexible effects

Active Publication Date: 2011-12-07
NANTONG CELLULOSE FIBERS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: To overcome the traditional disadvantages that the recovery speed and recovery rate of effective components in the tail gas cannot be balanced, the present invention provides an environmental protection device for solvent recovery and treatment in the tail gas that adopts secondary adsorption and can improve the processing speed and recovery rate

Method used

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  • Environment-friendly device for recycling and treating solvents in tail gas
  • Environment-friendly device for recycling and treating solvents in tail gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Parallel connection is adopted: valve 1 7, valve 2 8, valve 3 9, valve 4 10 are normally closed, and the rest of the valves need to be opened and closed according to the processing flow.

[0040] The tail gas is a mixture of solvent and air, and the solvent is hexane. The adsorption materials in the adsorption tower A5 and the adsorption tower B6 are activated carbon particles.

[0041] The valves mentioned above are all self-control type, connected to the self-control system, and the self-control system can control the switching action and switching time of each valve. The steam enters the steam pipeline from the steam inlet 12, and the steam pipeline is connected with a steam valve 13.

[0042] The tail gas enters from the upper end of the adsorption tower A5 or the adsorption tower B6, and the purified gas is discharged from the lower end of the adsorption tower A5 or the adsorption tower B6. The steam enters from the lower part of the adsorption tower A5 or the ad...

Embodiment 2

[0045] Adopt series connection form: valve 1 7, valve 4 10 normally open, valve 2 8, valve 3 9 normally closed; or, valve 2 8, valve 3 9 normally open, valve 1 7, valve 4 10 normally closed; other valves Normal switching is required by processing flow.

[0046] The tail gas is a mixture of solvent and air, and the solvent is a mixture of ordinary gasoline and 120# gasoline. The exhaust gas inlet 1 is connected with an exhaust pipeline and an exhaust valve 21 for use during device maintenance. An air cooler 3 is connected behind the fan 2 and in front of the adsorption tower A5. The adsorption materials in the adsorption tower A5 and the adsorption tower B6 are activated carbon fibers arranged in 3 layers.

[0047] Said valve is of self-control and manual double-acting type. During automatic control, the valve has a switch state feedback function, connected to the automatic control system, the automatic control system can control the switching action and switching time of ea...

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Abstract

The invention provides an environment-friendly device for recycling and treating solvents in a tail gas. The environment-friendly device comprises a self-control system, a tail gas inlet, a fan, an absorption tower A, an absorption tower B, a steam inlet, a desorption condenser, a chromatographic slot and a purified gas outlet as well as corresponding pipelines and corresponding valves, wherein opening / closing states of four valves correspond to two connection modes, namely a parallel connection mode and a serial connection mode; an absorption material adopts active carbon particles or activecarbon fibers; and the absorption tower A and the absorption tower B are connected with fire protection pipelines. During tail gas treatment, the device correspondingly has two different process flows; during serial connection, the tail gas is subjected to first absorption and second absorption, so that the absorption rate is high, the desorption speed is high, the solvent recycling rate is high,environment friendliness is realized, waste of the solvents is prevented, and alarm and fire protection parts guarantee secure running of the whole device. The environment-friendly device is applicable to treatment of various solvent-containing tail gases.

Description

technical field [0001] The invention relates to a device for treating tail gas discharged by chemical enterprises and recycling beneficial components, in particular to an environmental protection device for recovering and treating solvents in tail gas containing secondary adsorption. Background technique [0002] The process of using an adsorption tower to first adsorb and then desorb chemical tail gas is a conventional tail gas treatment method for chemical companies. The commonly used adsorption materials are activated carbon, perlite, etc., and the commonly used desorption media are steam, hot air, etc. The adsorption towers can be single or multiple in parallel. Such a treatment process is too simple, the components to be recovered in the exhaust gas are not absorbed very cleanly, and the treatment effect is not ideal. [0003] The patent application No. 200510037985.6 discloses a method and device for recovering solvent in coating tail gas by desorption method. After ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/04
Inventor 陆书明姚正飞
Owner NANTONG CELLULOSE FIBERS CO LTD
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