What is the difference between stream stripping and air stripping?

Stream stripping is a method of separating pollutants from wastewater by allowing the wastewater to come into direct contact with water vapor, so that the volatile toxic and hazardous substances in the wastewater can diffuse into the gas phase in a certain proportion.

The basic principle of the vapor extraction method is the same as the blowing off method, but the medium used is different, the vapor extraction is realized with the help of water vapor medium. Blowing off the law is to let the compressed air and wastewater full contact, so that the wastewater dissolved gas and volatile solutes through the gas-liquid interface, to the gas phase diffusion, so as to achieve the removal of pollutants in the method.

The process of separating pollutants by vapor extraction varies depending on the nature of the pollutant, and can generally be summarized as follows:

1 Simple distillation For volatile substances that are soluble in water, the use of gas - liquid equilibrium conditions, the concentration in the gas phase is greater than in the liquid phase of the concentration of this characteristic. By direct heating with steam, it is enriched in the gas phase in a certain proportion at the boiling point (a temperature between the two boiling points of water and volatile substances).

2 Steam distillation For volatile pollutants that are immiscible or nearly immiscible with water. The use of the boiling point of the mixture is lower than the boiling point of the two components of this characteristic, the high boiling point volatiles can be separated at a lower temperature to remove.

Basic principle of blowing off method

Let the compressed air and wastewater in full contact with the dissolved gases in the wastewater and volatile solutes through the gas-liquid interface, to the gas diffusion, so as to achieve the removal of pollutants in the method.

The main equipment of blowing off method - blowing off tower