Types of centrifugal pumps used in chemical production

Clear water pump is the most widely used pump. All of the transport of water and physical properties and water close, non corrosive and impurities of a small liquid pump is called the pump. The structure is simple and easy to operate. 

Transport of acid and alkali and ammonia and other corrosive liquids, must use the corrosion pump. The main characteristics of manufacturing corrosion resistant materials with liquid contact parts. It has the advantages of simple structure, easy maintenance and convenient replacement parts. Reliable sealing. For small pump. Used for corrosion resistant pump materials are: high silicon cast iron, stainless steel, all kinds of alloy steel, plastic, ceramics, glass, etc.. 

Pump for conveying petroleum products is called oil pump. Flammable and explosive oil products, and therefore the important requirements of the oil pump is sealed. When the stuffing box is used for sealing, the sealing ring of the stuffing box is continuously filled with cold sealing oil from the outside of the pump, and the pressure of the sealing oil is slightly higher than that of the inner side of the stuffing box to prevent the oil from leaking from the stuffing box. The seal oil is drawn from the other hole of the sealing ring. 

Hot oil pump for conveying high temperature oil products should have a good cooling system. The seal, bearings, bearings and other means are equipped with a water jacket, a cooling water cooling to prevent thermal expansion. The pump intake and outlet are upward, gas to separate out from the liquid not stored in the pump. The main parts of the heat pump are made of alloy steel, and the cooling oil pump can be used to cast iron. 

Liquid pumps in the chemical production process as a pump or pump is widely used. The liquid pump often installed in the liquid storage tank, the seal device requirements are not very high, so it can transport all kinds of corrosive liquid. This saves space and improve the operating environment. However, the efficiency of the liquid pump is relatively low. 

Transport with suspension, thick body particle slurry pump called the impurity pump. It is subdivided into sewage pump, pump, mud pump etc.. The requirements for this kind of pump are not easy to plug, easy to disassemble, wear resistant. The structure is characterized in that the impeller flow channel is wide, and the number of blades is small, and the inner lining of the pump casing is wear-resistant and can be replaced. 

The pump for non leakage pump, the impeller and motor as a whole and seal in the same pump shell, no seal, which is also called non seal pumps. Canned motor pumps are often used to transport flammable, explosive, toxic or radioactive substances, but its efficiency is relatively low.