The exhaust gas purification tower is the equipment to realize the absorption operation. It is divided into three types according to the contact form of gas and liquid phase. The first is the gas dispersion in liquid phase plate tower, bubble absorption tower, bubble absorption tower to form bubbles; the second is the liquid dispersion in the injector, venturi tube, spraying tower gas phase to liquid droplet; third kinds of liquid film in motion and gas phase contact filler the absorption tower and the falling film absorption tower. According to the practice, Hongfeng waste gas purification tower has been developed, and the biological purification column developed by biological purification is a new equipment in the waste gas purification tower.

The gas - liquid two - phase flow in the structure tower of the exhaust gas purification tower can be countercurrent and can flow. Usually, counter current operation is usually adopted. The absorber is added to the top of the tower to move upstream and downstream, contacting with the gas moving downward, absorbing the liquid from the bottom of the tower and discharging the purified gas from the top of the tower.

The Hongfeng exhaust gas purification tower indicates that the exhaust gas purification tower should have the following basic requirements:

After the tower of gas and liquid in sufficient contact area and contact time.

It has strong disturbance of gas-liquid two, reduce the mass transfer resistance, improve the absorption efficiency.

This wide operating range, stable operation.

This equipment, small resistance, low energy consumption.

We have sufficient mechanical strength and corrosion resistance.

It has the advantages of simple structure, convenient manufacture and maintenance.