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What methods can be used for laboratory waste gas treatment?

Views: 1     Author: Xicheng EP LTD     Publish Time: 2022-10-09      Origin: Xicheng EP LTD

The laboratory is the cradle of science, the base of scientific research, the source of scientific and technological development, and plays a very important role in the development of science and technology. The world-renowned famous laboratory is also known as the Mecca in the field of scientific research, and it is the place where scientific and technological workers look forward to and follow. These laboratories often represent the highest level of cutting-edge basic research in the world, and have produced a large number of Nobel Prize winners and epoch-making scientific and technological innovations. They are important occasions for high-level academic exchanges.

The experimental exhaust gas treatment should be based on the composition and concentration of the exhaust gas. If the main component of the exhaust gas is acidic exhaust gas, it can be treated by lye absorption method. If the exhaust gas composition is volatile organic compounds, the exhaust gas treatment can be treated by activated carbon adsorption and spray washing!

PPs air ducting

The experimental waste gas treatment is mainly to purify and treat other acid-base mixed waste gas and water-soluble waste gas such as high concentration nitrogen oxides (NOx), nitric acid (HNO3), etc. It has the advantages of high purification efficiency, compact structure, small footprint, corrosion resistance, Anti-ultraviolet and anti-aging treatment, light weight, easy transportation and installation, convenient maintenance and so on.

Acid-base waste gas will be generated in the production process such as pharmaceutical factory laboratories, and most of them are fugitive emissions.

Common laboratory waste gas treatment solutions:

(1) The combustion method includes high-temperature combustion and catalytic combustion. The former requires additional fuel combustion. Therefore, the recycling of heat energy should be considered when using this method; the energy consumption of catalytic combustion is low, but in the early stage of operation, the exhaust gas needs to be heated by electric heating Therefore, it is not suitable for occasions with frequent driving and parking. Considering that the heat recovered by the high temperature combustion method exceeds the heat energy required for production, it is not suitable. The direct use of catalytic combustion investment is too large.

(2) The absorption method is to use wet scrubber (such as diesel, kerosene, water and other media) to absorb in the absorption tower, and after absorbing to a certain concentration, the solvent and the absorption liquid are separated, the solvent is recovered, and the absorption liquid is reused or otherwise The key to using this method is the choice of absorbent. Because the separation of solvent and absorbent is difficult, its application is limited.


(3) Activated carbon adsorption method uses porous activated carbon or activated carbon fiber to adsorb organic waste gas, and then regenerates it with low-pressure steam after saturation. During regeneration, the solvent waste gas is condensed and water separated to recover the solvent. It is suitable for discontinuous treatment processes, especially for low-concentration organic waste gas. The solvent recovery in the waste gas has a very good effect.

(4) Condensation method Mainly use cold medium to treat high-temperature organic waste gas steam, which can effectively recover solvent. The quality of the treatment effect is related to the temperature of the refrigerant, and the treatment efficiency is relatively lower than other methods, and it is suitable for the treatment of high-concentration exhaust gas.

Here's the recommended solution:

In the workshop, the unorganized exhaust gas is first collected by the collection hood, and the exhaust gas is introduced into the acid (alkali)-containing scrubbing tower under the action of the induced draft fan for absorption and neutralization, so that the acid (alkali)-containing waste gas is neutralized and discharged up to the standard.


After the acid (alkali) waste gas is drawn out from the air duct, it enters the waste gas purification tower (counter-flow washing tower) for purification treatment. The purification tower is filled with certain fillers, so that the waste gas and the absorption liquid can be fully contacted, and the water flowing down from the tower It is then lifted to the top of the tower by a water pump and continuously recycled. After the circulating liquid reaches a certain concentration, it is discharged to the sewage treatment system for unified discharge.

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