The exhaust gas purification tower is divided into three kinds according to gas-liquid contact morphology. 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, the biological purification tower developed has adopted the principle of biological purification and has been filtered, absorbed and purified at different levels. It is another kind of original equipment in the exhaust gas purification tower.
The gas-liquid two-phase flow in the tower of exhaust gas purification tower can flow upstream or simultaneously. Countercurrent operation is usually used, the absorber is added to the top of the tower to flow from top to bottom, and the gas flowing from down to up is absorbed. The absorption liquid is discharged from the bottom of the tower, and the purified gas is discharged from the top.
The exhaust gas purification tower should have the following basic requirements:
1. the gas and liquid in the tower should have sufficient contact area and contact time.
2. gas-liquid two has a strong disturbance, which reduces the mass transfer resistance and improves the absorption efficiency.
3., wide operating range, stable operation.
4. equipment resistance, low energy consumption.
5. 、 sufficient mechanical strength and corrosion resistance.
6., simple structure, easy to manufacture and overhaul.
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