The dosing device is based on the metering pump as the main dosing equipment. The monitoring system, power control system, etc. are assembled on a public platform according to the requirements of the process flow to form a module, the so-called skid-mounted combined unit (referred to as "skid body"). The quantitative agent is put into the mixing as required The solution box is mixed and dissolved, and after the dissolution is completed, it is sent to the dosing point by the metering pump.

The dosing device is also called the dosing system and the dosing device. The dosing device is a complete set of equipment that injects chemical liquid into various systems according to the process flow. The equipment can be divided into three categories according to the application.

1. Oilfield dosing device. It is mainly used to inject flocculant, scale inhibitor, corrosion inhibitor, demulsifier and other liquid chemicals into the wellhead and other systems on the platform in oil exploration.

2. Boiler dosing device. It can be used for adding ammonia and hydrazine to boiler feed water, adding ammonia and hydrazine to condensate water, adding ammonia and hydrazine for shutdown maintenance, and adding phosphate to steam boilers, mainly used in power plants and power station.

3. Water treatment dosing device. Dosing to tap water, waste water and sewage during the water treatment process. Mainly used for water supply and drainage treatment, environmental protection and other technological processes. Such as water plants, hotels, restaurants, swimming pools, sewage treatment plants, etc. .

Its main working principle is that the motor drives the worm through the coupling and decelerates the worm gear to make the main shaft and the eccentric rotate, and the eccentric drives the tappet to reciprocate in the guide cylinder. Together with the diaphragm, the effect of the one-way valve makes the A vacuum is gradually formed in the pump chamber, the suction valve is opened, and the liquid is sucked in;

When the diaphragm moves to the front dead center, the suction valve is closed, the discharge valve is opened, and the liquid is discharged under the push of the diaphragm. After the pump is adjusted to a certain stroke, the reciprocating smooth operation also forms a continuous pressure and quantitative discharge of the liquid.

Flow adjustment characteristics The flow adjustment of the pump depends on rotating the adjustment handwheel to drive the adjustment screw to rotate, then change the distance between the tappets, and change the movement stroke of the diaphragm in the pump cavity to determine the flow rate. The scale of the adjustment handwheel determines the diaphragm. Itinerary with 95 percent accuracy.