Gas replacement ammonia removal technology is a new ammonia-nitrogen treatment technology with a new concept. Wastewater containing inorganic ammonia-nitrogen treated by this technology can meet the national first-class discharge standard (ammonia-nitrogen less than 15mg/L) in a single treatment. This technology is the only one in the world that can achieve the effluent ammonia-nitrogen less than 15mg/L through a single treatment.

Process base principle

Gaseous ammonia solubility in water and the partial pressure in the gas phase is always change with the change with the condition such as pressure, temperature, reduce the partial pressure of gas phase ammonia is the key to the ammonia in the water to the gas phase transfer conditions, and reduce the partial pressure of gas phase ammonia method, one is improve the vacuum degree of the gas phase space, 2 it is to increase the non-condensable gas partial pressure. Therefore, a large amount of air displacement is used to transfer the ammonia in the escaping effluent phase rapidly, so that the equilibrium of ammonia in the liquid and gas phases is always in favor of the direction of resolution, so that all ammonia can escape from the water. In addition, the solubility of air in water is a fixed value under certain conditions, increasing the solubility of air is conducive to the escape of other gases from water. Through high pressure dissolved air pump pressure, the air will be a large number of highly dispersed in water, squeeze, placeholder effect on the ammonia nitrogen in the water, forming a "explosive" trend, again by a special nozzle atomization, the liquid phase surrounded by ammonia nitrogen gas through the liquid, and liquid separation, through a large number of high pressure air to the ammonia nitrogen in the water displacement.

This technique is to use special high pressure dissolved air equipment, will be compressed air and waste water, and by using the principle of maximum saturation, the air in the dissolving in the waste water after mixing of air water mixture in particular container high-speed expansion, to reduce the partial pressure of ammonia, and speed up the separation of ammonia, in order to completely remove.

Gas displacement of NH3

Technical characteristics

1, high removal efficiency, can achieve a high concentration of ammonia nitrogen wastewater treatment standard discharge (ammonia nitrogen from 6000mg/L to a blowoff below 15mg/L)

2, can be used for the pretreatment of wastewater containing phenol and cyanide (low concentration phenol cyanide removal efficiency up to 90%)

3, low processing cost, high concentration, large amount of ammonia can be recycled

4, continuous water inlet, continuous water outlet, simple process, simple operation, stable operation.

Scope of application

1, chemical, metallurgy, coking, chemical fertilizer, pharmaceutical and other industries of high concentration of ammonia nitrogen wastewater treatment

2, all kinds of phenol, cyanide wastewater pretreatment.