VOCs recovery technology and system

A recovery system and process technology, applied in the field of VOCs recovery process and system, can solve the problems of low purification efficiency, difficulty in meeting the requirements of VOCs ultra-clean emission, waste of resources, etc.

Active Publication Date: 2018-05-18
SHANGHAI LANKE PETROCHEM ENG & TECH
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Problems solved by technology

Among them, condensation, absorption, and adsorption are used to purify VOCs waste gas through resource recovery, but the purification efficiency is not high, and it is difficult to meet the national or local requirements for VOCs ultra-clean emissions
Combustion and catalytic oxidation convert organic matter into harmless carbon dioxide and water by reacting with oxygen. It is a destructive VOCs purification technology. Although it has high efficiency, it will lead to waste of resources

Method used

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  • VOCs recovery technology and system
  • VOCs recovery technology and system

Examples

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Embodiment 1

[0063] In embodiment one, a kind of VOCs recycling process comprises steps:

[0064] S100, Condensation recovery: recover part of the VOCs waste gas by condensing the VOCs waste gas;

[0065] S200, heat exchange-adsorption: sequentially perform multi-stage adsorption treatment on the non-condensable gas generated in step S100; and perform heat exchange treatment on at least one pair of adjacent non-condensable gas adsorbed in two stages, so that it enters the previous stage The adsorbed non-condensable gas can exchange heat with the non-condensable gas adsorbed in the next stage.

[0066] In this embodiment, since the adsorption process is an exothermic process, and the high temperature will often affect the adsorption efficiency, this process conducts heat transfer treatment on the non-condensable gas in two adjacent adsorption stages arranged along the flow direction of VOCs waste gas, so that The non-condensable gas adsorbed in the previous stage is cooled to the temperatu...

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Abstract

The invention discloses a VOCs recovery technology and system. The VOCs recovery system includes a condensation device and an adsorption device; the condensation device is in serial connection with the adsorption device, so that VOCs waste gas is discharged after being treated by the condensation device and the adsorption device in sequence; the adsorption device includes an adsorption structure which includes at least two adsorption tanks which are in serial connection in sequence; a heat exchanger is arranged between at least one pair of adjacent adsorption tanks, so that non-condensable gasentering the former adsorption tank exchanges heat with non-condensable gas entering the latter adsorption tank in the heat exchanger. The VOCs recovery technology and system are good in environmental protection performance and high in resource utilization rate and treating efficiency, wherein the cold energy recovering during heat exchanging is a positive response to the environment protection national policy of China; at the same time, discharged tail gas reaches national discharging standards and even local VOCs discharging standards.

Description

technical field [0001] The invention relates to the technical field of environmental protection treatment, in particular to a VOCs recovery process and system. Background technique [0002] Volatile Organic Compounds (Volatile Organic Compounds, VOCs) is a general term for a series of volatile, flammable and toxic organic compounds, including alkanes, alkenes, aromatic hydrocarbons, alcohols, aldehydes, ketones, halogenated hydrocarbons, etc. VOCs are VOCs is a general term for organic compounds released into the air by volatilization of high vapor pressure materials during storage and loading and unloading of oil products and chemical materials. VOCs not only cause a great waste of resources but also cause serious air pollution. [0003] The technical principles of VOCs purification treatment include condensation, absorption, adsorption, combustion, and catalytic oxidation. Among them, condensation, absorption, and adsorption are used to purify VOCs waste gas through resou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D5/00B01D53/00B01D53/02
CPCB01D5/0036B01D5/0057B01D53/002B01D53/02B01D2259/40086B01D2257/708Y02P70/10
Inventor 杜先马洪玺何双荣张文军
Owner SHANGHAI LANKE PETROCHEM ENG & TECH
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