（一）The two main methods
1.By using velocity difference of different gas through the membrane,through the fast part gathered at the sides of the membrane, through the slow part gathered at the side of inlet.
2.Using gas react with some kind of absorption solution for recycling process,when the waste gas enter into the gas separation membrane,the gas to be treated through the membrane wall hole to react with some absorption liquid on the other side of the membrane to achieve the purpose of recycling.

Structure diagram
（二）Design parameters

Name	Model	Rated volume（KG/D）	Design volume（KG/D）	Operation mode	Size （inch）
					Effective length	Diameter
Gas separation membrane	KJ-NH-M4.5S	50	12~25	Blower blowing	20	4.5
	KJ-NH-M4.8	120	30~60		40	4.8
	KJ-NH-M7	300	75~150		40	7.0

2800KG/D-(LED) Ammonia recovery project with ammonia containing waste gas treatment

Blower section

Exhaust gas filtering and cooling section

Gas separation membrane