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Clean production process in field of chemical production

A technology for chemical production and clean production, which is applied in chemical instruments and methods, separation methods, and separation of dispersed particles, etc. It can solve the problems of difficult wastewater treatment and low recovery efficiency of volatile gases, and achieve the effect of pollutant emission reduction

Pending Publication Date: 2022-04-12
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of low volatile gas recovery efficiency and difficult wastewater treatment in the existing chemical production field, the present invention provides a clean production process in the chemical production field

Method used

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  • Clean production process in field of chemical production
  • Clean production process in field of chemical production
  • Clean production process in field of chemical production

Examples

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Effect test

Embodiment 1

[0069] The invention relates to a process for recovering and treating volatile organic compounds in clean production. The process method of the present invention is used to process the waste gas of epichlorohydrin produced in the production process of epoxy resin. Resin consumption per tank 3m 3 , the adsorption time is 5 hours, and the desorption temperature is 120-140°C.

[0070] The waste gas includes vacuum non-condensable gas and breathing waste gas, and the gas concentration of epichlorohydrin in the waste gas is 2481mg / m 3 , also contains a small amount of organic gas soluble in water (the volume percentage of oxychloropropane in the waste gas is greater than 95%), and the temperature of the waste gas is 20-50°C. The waste gas is first washed and absorbed by the absorption tower, and the washed waste gas is absorbed by the first adsorption resin tank group and then exhausted. The concentration of epichlorohydrin in the exhaust gas is 6.169mg / m 3 , achieve up-to-standa...

Embodiment 2

[0077] The invention relates to a process for recovering and treating volatile organic compounds in clean production, using the process method of the present invention to process waste gas whose main component is butanol. The concentration of butanol in the exhaust gas is 1936mg / m 3 , The exhaust gas temperature is 20-50°C; it also contains a small amount (less than 5% by volume) of water-soluble components and high-boiling components.

[0078] The desorption temperature of the first and second resin adsorption tanks is 120-140°C, and the desorption time is 1h; the concentration of butanol in the gas discharged up to the standard is 1mg / m3 3 ; The waste water COD of the waste water in the high concentration waste water tank: 113273mg / L, the liquid COD of the tower kettle: 36831mg / L. The recovery of butanol was 99.2%.

Embodiment 3

[0080] A recovery and treatment process for volatile organic compounds in clean production uses the process method of the present invention to process waste gas whose main component is dichloromethane. The concentration of dichloromethane in the exhaust gas is 3421mg / m 3 , the exhaust gas temperature is 20-50°C; it also contains a small amount of water-soluble components such as hydrogen chloride (content is less than 5%).

[0081] The desorption temperature of the first and second resin adsorption tank groups is 120-140°C, and the desorption time is 1h; the concentration of dichloromethane in the gas discharged up to the standard is 1mg / m3 3 ; The waste water COD of the waste water in the high-concentration waste water tank: 163821 mg / L, and the liquid COD of the tower kettle: 46239 mg / L. The recovery of dichloromethane was 99%.

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Abstract

The invention provides a clean production process in the field of chemical production, which comprises the following steps: absorbing water-soluble components, high-boiling-point components and the like in waste gas by using an absorption liquid to form medium-low-concentration waste water, adsorbing the washed volatile organic waste gas by using an adsorption resin I, and discharging the tail gas in a high-altitude up-to-standard manner; the adsorption resin I is regenerated regularly, desorption and recovery of the solvent are achieved, after condensation and phase separation, a solvent layer is recovered to a solvent tank for production, and a water phase serves as high-concentration wastewater and is subjected to steam stripping or rectification to further recover the solvent; the waste liquid obtained after steam stripping or rectification and the medium-low concentration wastewater are adsorbed through adsorption resin II, and the wastewater obtained after adsorption reaches the biochemical treatment standard; the adsorption resin II is regenerated regularly, desorption and recovery of the solvent are achieved, after condensation and phase separation, a solvent layer is recovered to a solvent tank for production, and a water phase serves as high-concentration wastewater and is subjected to steam stripping or rectification to further recover the solvent. The recovery rate of the organic volatile gas reaches 99% or above.

Description

technical field [0001] The invention belongs to the field of chemical production, and relates to a clean production process in the field of chemical production, in particular to a cleaning method for the comprehensive recovery and purification of waste gas and waste water in the field of chemical production to realize resource recycling, pollutant emission reduction, and standard discharge Production Process. Background technique [0002] In the field of chemical production, especially the fine chemical industry (medicine, pesticide, synthetic dyes and other intermediates), the production process involves solvent storage, chemical synthesis, refining, solvent recovery, drying and other processes, resulting in a large amount of organic solvents (alkanes, triphenyls, etc.) , ketones, esters, halogenated hydrocarbons, etc.) waste water, waste gas, etc., the cost of pollution control is very high or there is no good pollution control process at present, and environmental protect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/04B01D53/14
Inventor 徐传伟刘海棚
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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