Chemical process pump is the general name of various pumps in the process of chemical production. Many chemical process pump variety, according to its principle can be divided into vane pump, such as centrifugal pump, axial flow pump, mixed flow pump, flow pump, vortex pump; volume pump, such as reciprocating pump (including plunger pump, piston pump, diaphragm pump); rotary pumps (including the pump, liquid ring pump gear pump, vane pump, roots pump, radial plunger pump, etc.); other types of pumps, such as jet pump, electromagnetic pump, water hammer pump etc.. According to the production process or product characteristics, it can be divided into high pressure Methylamine Pump, low temperature pump, phosphoric acid slurry pump and so on.
In the chemical or petrochemical production, pumping at high temperature, low temperature (or low temperature), high pressure, flammable, explosive, toxic, highly corrosive media to work, some still in high entrance pressure, high lift, high viscosity, small flow, working under conditions of high cavitation performance of the chemical pump quitedemanding requirements, especially for corrosion resistance, does not allow leakage (for poisonous medium) and high abrasion resistance requirements. In order to meet the special requirements of chemical production, special chemical pumps are specially produced in chemical industry, such as plastic pumps, glass pumps, ceramic pumps, Shi Mobeng, canned pumps, magnetic pumps, impurity pumps and so on.
During the production of phosphate fertilizer, there are mainly media such as phosphate pulp, phosphoric acid slurry, various filtrate, concentrated phosphoric acid dilute phosphoric acid, concentrated sulfuric acid, dilute sulfuric acid and fluosilicon acid. Phosphate slurry pump is a pump all kinds of phosphate fertilizer production process, generally referred to, is a very strong representation of corrosion and abrasion of pump. In the early stage of the development of phosphate fertilizer industry, some chemical corrosion pumps have been used for only a week. Therefore, experts from domestic and foreign pump industry have made a lot of research on the structure design, material test and sealing research of phosphate slurry pump. In the design of the phosphoric acid slurry pump, the problem of corrosion resistance or corrosion and erosion is the first thing to be solved. Therefore, the matching between the structure design and the pump shell and the impeller should be taken into consideration. The metal materials used in foreign phosphoric acid slurry pump use different series according to the condition of medium. Domestic manufacturers and research institutes also studied the corrosion and anti wear properties of various materials, and created their own ferritic stainless steel, dual phase steel, austenitic stainless steel and other materials. There are many professional manufacturers of phosphate slurry pumps in China. At the same time, there are Chinese Academy of Sciences, universities, design institutes, research institutes and other research institutes involved. The localization of phosphate slurry pumps has been basically solved. Sanitary pump
China has built a large, medium and small compound fertilizer production projects, large and medium sized device about a variety of slurry pump 30~40, medium and small device about all kinds of slurry pump 20~30 units, according to each pump life expectancy 6 months total, the market space is relatively large. In addition, the domestic fertilizer production enterprises are still some large infrastructure projects recently completed or are ongoing, with a number of small and medium-sized revamping and expansion project for the domestic fertilizer pumps provide a broad market space.
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