Exhaust gas scrubber is a kind of waste gas treatment equipment widely used in chemical, metallurgy, electric power, medicine and other fields. It can convert the harmful substances in the exhaust gas into harmless substances through absorption, adsorption, chemical reaction and other ways to achieve the purpose of purifying the exhaust gas. This article will introduce the working principle, selection and design points of the exhaust gas scrubber to provide valuable information for readers.
First, the working principle of the exhaust gas scrubber
The main working principle of the exhaust gas scrubber is to convert the harmful substances in the exhaust gas into harmless substances by fully contacting the exhaust gas with the scrubbing liquid, using dissolution, adsorption, chemical reaction and other methods. Specifically, the exhaust gas enters the tower body through the air intake pipeline, contacts with the washing liquid in the tower body, and converts the harmful substances in the exhaust gas into harmless substances through physical adsorption, chemical reaction, etc. After washing, the exhaust gas is discharged through the exhaust pipe, while the washing liquid continues to be recycled, forming a closed circulation system.
The working principle of the exhaust gas scrubber can be described by the following aspects.
1.The harmful substances in the physical adsorption exhaust gas can be adsorbed by the washing liquid by physical adsorption, so as to achieve the purpose of purifying the exhaust gas. This method is mainly suitable for low concentrations of harmful substances in the exhaust gas.
2.Chemical absorption of acid, alkali and other harmful substances in the exhaust gas can be absorbed by the washing liquid by chemical absorption, so as to achieve the purpose of purifying the exhaust gas. This method is mainly suitable for high concentrations of harmful substances in exhaust gases.
3.The harmful substances in the exhaust gas of the chemical reaction can react with the washing liquid by chemical reaction, thus being converted into harmless substances. This method is mainly suitable for high concentrations of harmful substances in exhaust gases.
Second, the selection and design points of the exhaust gas scrubber
The selection and design of the exhaust gas scrubber is the key to ensure the normal operation of the equipment and the purification effect. The following are the key points for the selection and design of exhaust gas scrubbers.
1.Selection points.
1) Exhaust gas treatment capacity: Select the appropriate exhaust gas scrubbing tower according to the exhaust gas treatment capacity to ensure that the treatment capacity of the equipment matches the exhaust gas emissions.
2) Composition of exhaust gas: Select the appropriate washing liquid according to the composition of the exhaust gas to ensure the washing effect.
3) The utilization of washing liquid considers the utilization of washing liquid to reduce operating costs.
4) Operating environment: Choose appropriate materials according to the operating environment to ensure the stable operation and durability of the equipment.
2.Design Essentials.
1) The equipment structure is reasonably designed to ensure that the exhaust gas is in full contact with the washing liquid.
2) The washing liquid circulation system is reasonably designed to ensure the full utilization and improvement of the washing liquid.
3) The detergent formula is designed according to the composition of the exhaust gas and the treatment requirements to ensure the washing effect.
4) Emission standards: According to the relevant standards and requirements, determine the exhaust emission standards to ensure that the operation of the equipment meets the environmental protection requirements.
Exhaust gas scrubber is an important waste gas treatment equipment, which can convert harmful substances in waste gas into harmless substances to achieve the purpose of purifying waste gas. In the selection and design, it is necessary to consider the exhaust gas treatment capacity, waste gas composition, washing liquid utilization, operating environment and other factors to ensure the normal operation and purification effect of the equipment.