Dosing system is a complete set of equipment integrating dosing, mixing, liquid transportation and automatic control. It is widely used in raw water, boiler feed water, oil field surface gathering and dehydration treatment system, various dosing systems and wastewater treatment systems in petrochemical industry. Such as adding coagulant, phosphate, ammonia solution, lime water, corrosion inhibitor, scale inhibitor, bactericide and algicide, etc.