Solid alkali adsorbent and integrated device for synchronously treating acid gas and organic waste gas

A technology of adsorbent and solid alkali, which is applied in the field of comprehensive waste gas treatment, can solve problems such as complex treatment devices, many equipment failures, and complex waste gas components, and achieve the effects of simple use, reduced toxicity, and elimination of high toxicity

Active Publication Date: 2019-02-01
张少强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a solid alkali adsorbent and an integrated device for synchronously treating acid gas and organic waste gas in view of the current defects in electroplating industry, such as complex components of waste gas, including various acid gases and VOCs gases, complex treatment devices, and many equipment failures. , the device uses solid base as the adsorbent of acidic gas. In order to cope with the absorption and transformation of different acidic gases, chemical agents are added to the solid base to convert highly toxic gases into low-toxic or non-toxic components.

Method used

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  • Solid alkali adsorbent and integrated device for synchronously treating acid gas and organic waste gas

Examples

Experimental program
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Effect test

Embodiment 1

[0038] The porous material of the solid base is activated carbon, and the activated carbon is cylindrical particles with a diameter of 4 mm. The reducing agent is sodium pyrosulfite, which is formulated into a 20% solution, and then activated carbon is soaked in the sodium pyrosulfite solution. The solution needs to be soaked in activated carbon, and the soaking time is preferably controlled at 0.5-10 hours. After impregnation, the impregnated activated carbon is dried, and the drying temperature is preferably controlled at 80°C. After drying, the activated carbon is re-impregnated in alkaline solution for secondary impregnation. The alkaline solution is sodium hydroxide. The immersion concentration is 10%, and the immersion time is 0.2-3 hours. Drying or natural drying after impregnation is completed, which is a solid alkali adsorbent with reducing ability, and the loading amount of reducing agent is 10%; the loading amount of alkaline agent is 10%.

[0039] An integrated ...

Embodiment 2

[0044] A one-step method was used to prepare the solid alkali adsorbent. Make a 10% solution of sodium metabisulfite and sodium sulfite according to the ratio of 1:2. After dissolving, gradually add solid sodium hydroxide, stir to dissolve, and the amount added is 10% of the solution concentration. After the dissolution is completed, add spherical alumina particles, the specific surface area of ​​alumina is required to be 300m 2 / g or more. The alumina particles are immersed in the above mixed solution for 2 hours, and the liquid level of the immersion solution is required to completely submerge the alumina pellets. After the impregnation is completed, dry the alumina pellets at about 80°C, which is a solid alkali adsorbent with reducing function. The loading of reducing agents is 9%; the loading of alkaline agents is 9%.

[0045] The solid alkali adsorbent prepared in this example was used as a filler, filled in the electroplating acid gas and organic waste gas integrated t...

Embodiment 3

[0049] A one-step method was used to prepare the solid alkali adsorbent. Compared with Example 2, the impregnated alkali is changed to calcium hydroxide with lower cost, and other components are unchanged. Make a 10% solution of sodium metabisulfite and sodium sulfite according to the ratio of 1:2. After dissolving, gradually add solid calcium hydroxide, stir to dissolve, and the amount added is 10% of the solution concentration. After the dissolution is completed, add spherical alumina particles, the specific surface area of ​​alumina is required to be 300m 2 / g or more. The alumina particles are immersed in the above mixed solution for 2 hours, and the liquid level of the immersion solution is required to completely submerge the alumina pellets. After the impregnation is completed, dry the alumina pellets at about 80°C, which is a solid alkali adsorbent with reducing function. The loading of reducing agents is 6%; the loading of alkaline agents is 7%.

[0050] The solid a...

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Abstract

The invention provides a solid alkali adsorbent and an integrated device for synchronously treating acid gas and organic waste gas, wherein the solid alkali adsorbent comprises a multi-hole type material, a reducing agent and an alkaline agent, wherein the reducing agent and alkali are loaded in the multi-hole type material; the loading amount of the reducing agent is 1-10 %; the loading amount ofthe alkaline agent is 0.5-10 %. By adding chemical agents to the solid alkali, high-toxic gases are converted into low-toxic or non-toxic components; the solid alkali adsorbent and VOCs adsorbent areassembled together in the same tower to form the integrated device capable of synchronously treating the acid gas and the organic waste gas to cope with the absorption and conversion of the differentacid gases. The device is simple and can realize the purpose of synchronously treating complex gases.

Description

technical field [0001] The invention relates to a solid alkali adsorbent and an integrated device for synchronously treating acid gas and organic waste gas, in particular to an integrated treatment device for the removal of acid gas commonly present in the electroplating industry and the VOCs gas generated during the electroplating process. The dry treatment method does not require liquid absorbents and circulation systems, and the device is extremely simple. It can be used for acid gas treatment or the coexistence of acid gas and VOCs gas, especially suitable for comprehensive waste gas treatment of electroplating enterprises. Background technique [0002] There is a large amount of acid gas in electroplating enterprises. In the electroplating production process, acidic gases of different components are usually discharged due to the use of acidic substances such as hydrochloric acid and sulfuric acid for pickling, light extraction and chemical polishing. Such as: hydrogen ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J20/30B01D53/02
CPCB01D53/02B01D2253/102B01D2257/708B01J20/041B01J20/08
Inventor 张少强
Owner 张少强
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