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Absorption treatment method and system for VOC organic exhaust gas

A technology of organic waste gas and treatment method, which is applied in the field of purification of VOC organic waste gas and absorption treatment of VOC organic waste gas, which can solve the problems of single use of absorbent, low absorption rate, secondary pollution, etc., and achieve continuous treatment , low cost, efficient absorption and removal effect

Inactive Publication Date: 2018-01-12
北京化工大学苏州(相城)研究院 +2
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Problems solved by technology

Taking the absorption method as an example, it mainly uses the principle of similar solubility of organic substances to absorb VOC with low-volatility or non-volatile solvents, and then separates VOC molecules and the difference in physical properties of the absorbent, but its absorption rate is relatively low. Low, and usually requires a large amount of absorbent, high cost, and the absorbent can only be used once, so it is easy to cause secondary pollution

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  • Absorption treatment method and system for VOC organic exhaust gas

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Embodiment Construction

[0022] In view of the deficiencies in the prior art, the inventor of this case has been able to propose the technical solution of the present invention after long-term research and extensive practice, which is mainly a VOC organic waste gas absorption treatment method and its system. The technical solution, its implementation process and principle will be further explained as follows.

[0023] An aspect of the embodiment of the present invention provides a VOC organic waste gas absorption treatment method comprising:

[0024] (1) Fully contact the VOC organic waste gas with the absorbent in the absorption device, so that at least part of the organic matter in the organic waste gas is absorbed by the absorbent to form an absorbent-rich liquid (hereinafter referred to as rich liquid). If the purified waste gas reaches the standard then discharge outward;

[0025] (2) Make the absorbent-rich liquid enter the desorption device, vacuum extract or separate by heating or reversely c...

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Abstract

The invention discloses an absorption treatment method and system for VOC organic exhaust gas. The method comprises the following steps that a part of organic matters are separated from the VOC organic exhaust gas by using a condensation unit, then the VOC organic exhaust gas is allowed to fully contact with an absorbent in an absorbing device, organic matters in the exhaust gas are absorbed and purified by the absorbent, then the exhaust gas is discharged, and the absorbent is converted into an absorbent rich solution; and the absorbent rich solution may undergo vacuum extracting or heating in a desorption device or carry out counter-current contact with purge gas in the desorption device to allow organic matters in the absorbent rich solution to be desorbed so as to obtain a regeneratedabsorbent lean solution, the regenerated absorbent lean solution is conveyed to the absorbing device for recycling, and desorption gas with enriched organic matters is subjected to condensation or burning or oxidation treatment. With the treatment method provided by the invention, organic components with high value in the VOC organic exhaust gas can be recovered and efficiently removed; and sincethe absorbent is cyclically used, operation cost and environmental pollution are reduced.

Description

technical field [0001] The invention relates to a method for purifying VOC organic waste gas, in particular to a method and system for absorbing and treating VOC organic waste gas, and belongs to the technical field of waste gas treatment. Background technique [0002] Volatile Organic Compounds (Volatile Organic Compounds, referred to as VOCs) refer to volatile hydrocarbons and their derivatives, including hydrocarbons, aromatic hydrocarbons, alcohols, aldehydes, ketones, lipids, amines, organic acids wait. VOCs are air pollutants that have been widely concerned after sulfur dioxide, nitrogen compounds and freons, and their industrial sources are synthetic material production, petroleum refining and petrochemical industry, architectural decoration, machinery and equipment manufacturing and other industries. [0003] The main hazard of VOCs is that it reacts with nitrogen oxides in the atmosphere to generate photochemical smog, which is harmful to human health, and it also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14B01D53/18
CPCY02A50/20
Inventor 赵宏高立东陈建峰
Owner 北京化工大学苏州(相城)研究院
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