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Industrial waste gas treatment system design

Views: 4     Author: Xicheng EP LTD     Publish Time: 2022-08-01      Origin: Xicheng EP LTD

How much do you know about the design of industrial waste gas treatment systems?


Nowadays, most industrial manufacturing enterprises install environmental protection equipment, and they are more concerned about whether they can meet the standard after installation. There are three points to meet the standard. First, whether the manufacturer has this technical strength, second, whether the product selection is correct, and third, there is No experience in waste gas treatment engineering, or no understanding of industrial waste gas treatment system design.


Industrial waste gas treatment system treatment process

Exhaust gas collection ---> Exhaust gas treatment ---> Fan discharge


exhaust gas collection


Collect waste gas, and install a cover on the place where waste gas is generated in the workshop, which is generally made of galvanized sheet or stainless steel. Because it is used to collect exhaust gas, it is called a gas collecting hood. However, in some workshops, there are many waste gas generation points, which cannot be effectively collected. In this case, all the gas in the entire workshop can only be extracted for treatment.


Selection of waste gas treatment equipment


After the exhaust gas is collected, it is transported to the exhaust gas treatment equipment through the ductwork for effective filtration treatment. The most important thing is the selection of waste gas treatment equipment. For different waste gases, and the desired effects are different, the selected equipment is different. Most of the industrial waste gas treatment uses the waste gas washing tower system for pretreatment.

Why use an exhaust gas wet scrubber? Because the general exhaust gas has a little dust, or the temperature is a little high, after pretreatment by the exhaust gas wet scrubber, it can better improve the purification efficiency of the subsequent equipment. Of course, if there is a lot of dust, a filter cartridge dust collector or a bag filter should be used for dust removal. The exhaust gas scrubber is only suitable for a small amount of dust.

nitric acid scrubber

The main use scenario of the waste gas wet scrubber is to treat acid and alkali waste gas. Wet scrubbers neutralize the acid and alkali components of the gas through the fusion of gas and liquid. The diameter of the scrubber needs to be designed by calculating the exhaust air volume. The scrubbing efficiency can be improved by adding multiple wet scrubbers, and the highest treatment effect can reach 95%.


After the purification equipment, the last is the fan. The function of the fan is to provide power for the purification system, so that the exhaust gas is discharged through the exhaust pipe after being treated by the purification equipment.


Determination of air volume for waste gas treatment


The air volume of waste gas treatment is determined, for example, the air volume of the gas collecting hood is calculated according to the air volume of 2000 per square meter. If it is unorganized, the waste gas cannot be collected, and the gas in the entire workshop can only be extracted. According to the exhaust gas concentration and treatment effect, choose different ventilation times, some choose 6-8 times, some choose 20-30 times, and some choose 100-150 times, for example, the workshop volume is 1,000 cubic meters, Note that it is a cube instead of a square, that is, the length*width*height of the workshop, and the number of air changes is 8, so the processing capacity per hour is 8,000 air volumes.


Of course, some have already installed a ventilation system, and a purification device needs to be installed on the ventilation system, so that it can be selected according to the air volume of the fan, to ensure that the air volume of the purification equipment is greater than the air volume of the fan.


After the air volume is determined, different purification equipment should be selected according to different waste gases, so that the entire industrial waste gas treatment system is designed and completed.

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