VOCs recovery system using air copious cooling

A technology of recovery system and air purification system, applied in the field of high-efficiency, low-cost separation and recovery of volatile organic gases, to achieve the effects of reducing operating costs, wide adaptability and improving stability

Active Publication Date: 2018-08-28
NANJING TECH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And the microchannel heat exchangers used in this patent (CN201510068202.4 a high-efficiency and low-cost VOC recovery system and method) are all plate-type modular installations

Method used

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  • VOCs recovery system using air copious cooling
  • VOCs recovery system using air copious cooling

Examples

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Embodiment 1

[0020] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0021] like figure 1 As shown, the VOCs recovery system includes a gaseous air purification system, an air liquefaction system and a VOCs recovery cold box. The gaseous air purification system includes an air filter 1, a cold dryer 4, and an air purifier 5; the air liquefaction system includes an air compressor 2, an air storage tank 3, a turbo expander 6, and an air precooler 8; the VOCs recovery cold box includes VOCs condenser 7, VOCs precooler 9 and gas-liquid separator 10.

[0022] When the system is working, th...

Embodiment 2

[0026] In addition to the process used in Example 1, the present invention can also further process the gas separated by the gas-liquid separator to reduce the VOCs content therein. Such as image 3 As shown, the gas flowing out of the gas-liquid separator 10 enters the microchannel mixer 11 to be directly mixed with the liquid air, the separated liquid components enter the storage tank for storage, and the low-temperature gas enters the next process. In this embodiment, the structures of the VOCs precooler and the air precooler may be the same or different, but the functions realized are different. Other equipment is the same as that in Embodiment 1, so it will not be described in detail.

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Abstract

The invention relates to an efficient and low-cost VOCs recovery system using air copious cooling. The recovery system comprises a gaseous air purification system, an air liquefaction system, a VOCs recovery cold box and the like, wherein the gaseous air purification system comprises an air filter, a freezing dryer and an air purifier; the air liquefaction system comprises an air compressor, an air storage tank, a turbo expander and an air precooler; and the VOCs recovery cold box comprises a VOCs precooler, a VOCs condenser and a gas-liquid separator. According to the recovery system providedby the invention, air is used as a cooling medium in a VOCs recovery process, so that VOCs are condensed and separated. The treated VOCs gas meets national emission standards and can be directly discharged into the atmosphere. Compared with a traditional condensation method, this method can greatly improve the recovery rate of organic gases, effectively shorten the recovery process and simplify the recovery process. At the same time, the use of the method is not limited by the concentration and composition of a source gas, and the application range is wider.

Description

technical field [0001] The invention belongs to the field of purification and separation of volatile organic gases, and in particular relates to a system and method for separating and recovering volatile organic gases with high efficiency and low cost. Background technique [0002] VOCs is the abbreviation of Volatile Organic Compounds, which is an important cause of smog and PM2.5. In order to reduce the harm caused by heavily polluted weather to people's lives, my country has introduced various VOCs response mechanisms. The most important point is to reduce the emission of VOCs gas in industrial production and strengthen the recovery and management of VOCs. [0003] At present, the VOCs recovery technologies used in my country mainly include condensation method, adsorption method, absorption method, catalytic combustion and membrane separation method. For example, the recently published patent CN201710160578.7 is a high-concentration VOC gas purification and recovery dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/00B01D5/00
CPCB01D5/0003B01D53/002B01D2257/708B01D2258/06F25J3/061F25J3/064F25J3/0635F25J2210/40F25J2215/04F25J2220/40F25J2270/14F25J2270/904B01D53/261B01D53/265
Inventor 凌祥刘冬稔
Owner NANJING TECH UNIV
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