Reasons for poor absorption in the absorption tower
Thread Content
The bubble absorption tower is shown in the figure. The desalinated water at the top of the tower is controlled to flow downward at a constant rate, pressurized nitrous gas is introduced at the bottom of the tower, and each tray in the bubble column is cooled using chilled water. If the exhaust gas after absorption at the top of the tower turns yellow, it indicates that the gas has not been absorbed properly. (At this point, the pressure difference across the tower increases.) The solution is to reduce the amount of desalinated water added to the top of the tower or to stop supplying desalinated water; by doing so, the amount of gas entering the bottom of the tower is reduced. After some time, the amount of desalinated water supplied to the top of the tower can be gradually increased back to normal, and the color of the exhaust gas will return to its normal level. May I ask why handling it in this way restores the absorption effect to normal?
If the tower pressure difference is high, does it mean that the volume of rising gas is large, and the desalinated water cannot absorb it all?
This post was last edited by mm280054599 on 2020-9-19 22:41: 1. Excess air velocity reduces absorption efficiency and also increases the pressure difference； 2. The tower returned to normal primarily due to the reduction in gas velocity; decreasing the flow rate of deionized water was done to save energy ；
Would increasing the amount of water to be desalinated also lead to an increase in pressure difference, thereby affecting absorption?
Circulating fluid mass? Traffic? Operating temperature? Pressure? Analyze the data!
Without a circulating fluid, the flow rate of demineralized water supplied is less than one cubic meter. Operating temperature of the absorption tower: 15°C; pressure: 4 kilograms
Similar to tray flooding, reduce the liquid level on the tray so that the bubble caps reach an open rate
Can plain water be used instead of sprays like urea to treat nitrogen oxides?
Are the gases and liquids evenly distributed?
Does an increased volume of fluid administration lead to poor absorption?
When normal absorption is poor, it’s necessary to reduce gas and add liquid. But the fact that you’re reducing both gas and liquid here is some strange approach. Isn’t the amount of gas produced determined by the upstream process? When absorption is poor, where does the amount of gas that’s reduced go? Can it be contained? Is environmental regulation lax in this area? Normally, a reducing agent is needed to treat nitrogen oxides