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Method used for treating VOCs exhaust gas at low cost

A low-cost, exhaust-gas technology, applied in the direction of combustion methods, separation methods, chemical instruments and methods, etc., can solve the problems of low concentration and difficult to meet, and achieve the effect of large adsorption capacity, high tap density and excellent performance

Inactive Publication Date: 2018-01-16
DONGGUAN LIANZHOU INTPROP OPERATION MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of volatile organic compounds (VOCs) with large gas volume, low concentration, and unstable gas volume, the above-mentioned technologies have various defects, and it is difficult to meet GB31570 "Petroleum Refining Industry Pollutant Discharge Standard", GB31571 "Petrochemical Industry Industrial Pollutant Emission Standards requires the removal efficiency of non-methane total hydrocarbons to be ≥97%, and especially requires that the benzene emission index is ≤4mg / m 3

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A low-cost method for treating VOCs waste gas, comprising the following steps:

[0026] (1) Soluble manganese salt, soluble copper salt and deionized water are mixed and stirred until the solid dissolves to obtain a mixed solution; wherein, the soluble manganese salt is manganese chloride, and the soluble copper salt is copper nitrate; the molar amount of copper salt and manganese salt The ratio is 0.1:1;

[0027] (2) Sodium hydroxide and deionized water are mixed and stirred until the solid dissolves to obtain a sodium hydroxide solution; the mixed solution and the sodium hydroxide solution are simultaneously added to the reactor, stirred and precipitated to obtain a suspension; wherein, mixing The rate of addition of the solution is 1mL / min, and the rate of addition of the sodium hydroxide solution is 1.2mL / min;

[0028] (3) Add an oxidizing agent to the suspension prepared above, stir and oxidize at 10-60° C. for 10 h; after the reaction is completed, centrifuge, an...

Embodiment 2

[0034] A low-cost method for treating VOCs waste gas, comprising the following steps:

[0035] (1) Mix and stir soluble manganese salt, soluble copper salt and deionized water until the solid dissolves to obtain a mixed solution; wherein, the soluble manganese salt is manganese acetate, and the soluble copper salt is copper nitrate; the molar ratio of copper salt and manganese salt 0.3:1;

[0036] (2) Sodium hydroxide and deionized water are mixed and stirred until the solid dissolves to obtain a sodium hydroxide solution; the mixed solution and the sodium hydroxide solution are simultaneously added to the reactor, stirred and precipitated to obtain a suspension; wherein, mixing The rate of addition of the solution is 3mL / min, and the rate of addition of the sodium hydroxide solution is 2.2mL / min;

[0037] (3) Add an oxidizing agent to the suspension prepared above, stir and oxidize at 10-60° C. for 60 h; after the reaction is completed, centrifuge, and the obtained solid is ...

Embodiment 3

[0043] A low-cost method for treating VOCs waste gas, comprising the following steps:

[0044] (1) Soluble manganese salt, soluble copper salt and deionized water are mixed and stirred until the solid is dissolved to obtain a mixed solution; wherein, the soluble manganese salt is manganese nitrate, and the soluble copper salt is copper nitrate; the molar ratio of copper salt and manganese salt is 0.15:1;

[0045] (2) Sodium hydroxide and deionized water are mixed and stirred until the solid dissolves to obtain a sodium hydroxide solution; the mixed solution and the sodium hydroxide solution are simultaneously added to the reactor, stirred and precipitated to obtain a suspension; wherein, mixing The rate of addition of the solution is 1.5mL / min, and the rate of addition of the sodium hydroxide solution is 1.4mL / min;

[0046] (3) Add an oxidizing agent to the suspension prepared above, stir and oxidize at 10-60° C. for 20 h; after the reaction is completed, centrifuge, and the ...

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PUM

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Abstract

The invention discloses a method used for treating VOCs exhaust gas at low cost. According to the method, a soluble manganese salt and a soluble copper salt are taken as raw materials; coprecipitationis adopted to prepare a catalyst; a cloth bag-type dust collector is used for dedusting of VOCs exhaust gas; after dedusting, the VOCs exhaust gas is delivered into a reactor containing an adsorbent;after adsorption saturation, heating and desorption are carried out; after desorption, the obtained gas is delivered into a reactor containing the catalyst, and the reactor is heated so as to realizecatalytic combustion of the gas; after combustion, purified gas is obtained and discharged. The method is capable of removing VOCs gas in exhaust gas effectively; no secondary air pollution is caused; and cost is low.

Description

Technical field: [0001] The invention relates to a method for treating VOCs waste gas, in particular to a low-cost method for treating VOCs waste gas. Background technique: [0002] The current treatment technologies for volatile organic compounds (VOCs) mainly include the following methods: condensation recovery technology, absorption recovery technology, membrane recovery technology, adsorption recovery technology, and catalytic combustion technology. However, in the case of volatile organic compounds (VOCs) with large gas volume, low concentration, and unstable gas volume, the above-mentioned technologies have various defects, and it is difficult to meet GB31570 "Petroleum Refining Industry Pollutant Discharge Standard", GB31571 "Petrochemical Industry Industrial Pollutant Emission Standards requires the removal efficiency of non-methane total hydrocarbons to be ≥97%, and especially requires that the benzene emission index is ≤4mg / m 3 . If the recycling technology wants...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/44B01D46/02B01J20/20B01J20/30B01J23/889F23G7/07
CPCY02A50/20Y02A50/2351
Inventor 陈东进
Owner DONGGUAN LIANZHOU INTPROP OPERATION MANAGEMENT CO LTD
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