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Acid-base waste gas treatment process

Views:8     Author:Xicheng Ep Ltd     Publish Time: 2021-09-27      Origin:Xicheng Ep Ltd

1. Overview of acid and alkali waste gas


Industrial acid and alkali waste gas mainly comes from the acid and alkaline waste gas emitted during the production process of the chemical, electronics, metallurgy, electroplating, textile (chemical fiber), food, machinery manufacturing and other industries. The discharge indoors is harmful to human health and is discharged outdoors. It is harmful to the atmosphere, soil, plants, buildings, etc., and creates a good living space for humans and the environment. The reasonable treatment of acid and alkaline gases in exhaust gas is a necessary measure to control air pollution. Acid-base waste gas treatment usually uses wet scrubbers, which are collectively referred to herein as acid-base scrubbers.


2. Working principle of acid-base scrubber


The main operation mode of the acid-base scrubber is to continuously introduce the acid mist exhaust gas into the purification tower through the air duct, and pass through the packing layer. The exhaust gas and the sodium hydroxide absorption liquid undergo gas-liquid two-phase full contact absorption and neutralization reaction. After being dehydrated and defogged by a defogging plate, the fan is discharged into the atmosphere. The absorption liquid at the bottom of the tower is pressurized by a water pump and sprayed down at the top of the tower, and then returned to the bottom of the tower for recycling. The purified acid mist exhaust gas meets the emission requirements of local emission standards, which is lower than the national emission standards.


3. Structural composition of acid-base scrubber


The acid-base waste gas treatment tower is divided into a single tower body and a double tower body. It adopts a circular tower body and is connected in sections by flanges. Specifically, it consists of a liquid storage tank, a tower body, an air inlet section, a spray layer, a packing layer, a swirling defogging layer, an air outlet cone cap, and an inspection hole.

4. Features of acid-base scrubber


The process is simple, and the management, operation and maintenance are quite convenient and concise, and will not cause any impact on the production of the workshop.

The pressure drop is low, the operation flexibility is large, and it has a good defogging performance.

The purification treatment effect is good, and the removal rate can be as high as 95% or more.


5. Acid-base waste gas treatment process


The specific process of acid and alkali waste gas treatment: the removed acid mist waste gas → enters the air duct → passes through the acid and alkali scrubber purification treatment → fan → air duct → discharges up to standard.


6. Scope of application of acid-base scrubber


Acid-base scrubbers are widely used in the purification treatment of acid and alkaline waste gas discharged in the production process of chemical, electronics, metallurgy, electroplating, textile (chemical fiber), food, machinery manufacturing and other industries.

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