Chemical industry process pump series and current development
Chemical process pump is the chemical production process of the general term for a variety of pumps. Chemical Process Pumps are many varieties, according to their action principle can be divided into vane pump, such as centrifugal pump, axial flow, mixed-flow pump, part of the flow pump, vortex pump, etc.; displacement pump, such as reciprocating pumps (including piston, piston pumps, diaphragm pumps, etc.); rotary pumps (including pumps, liquid ring pumps gear pumps, vane pumps, Roots pumps, radial piston pump, etc.); other types of pumps, such as the jet pump, electromagnetic pump, water hammer pumps. According to the production process or product characteristics, can be divided into high-pressure methylamine pump, cryogenic pumps, phosphate slurry pump and so on.
Chemical process pump in the chemical or petrochemical production, pump in high-temperature, low temperature (or ultra-low temperature), high pressure, flammable, explosive, toxic, corrosive media, strong work, and some are still high inlet pressure, high lift, high-viscosity , small flow, high-cavitations under the conditions of work, the performance of chemical pumps made quite demanding, especially for corrosion resistance, does not allow leakage (for poisonous medium) and resistance to wear a tall order. Chemical production to meet the special requirements of machine industry in the production of chemicals specially dedicated pumps, such as plastic pump, pump the glass, ceramic pumps, graphite pumps, canned motor pump, magnetic pump, pump and other impurities.
Chemical process pump in the application of phosphate fertilizer production process that need to transport the media are mainly phosphate rock slurry, phosphoric acid slurry, all kinds of filtrate, concentrated phosphoric acid dilute phosphoric acid, concentrated sulfuric acid, sulfuric acid, and fluoride acid, etc., pumps vulnerable to media corrosion and erosion corrosion or wear and tear. Phosphate slurry pump is a phosphate fertilizer production process of various pump pan that is a very strong representation of corrosion and wear-resistant pumps kinds. In the initial development of phosphate fertilizer industry, common chemical corrosion resistant pumps, some life span of only a week, so the experts at home and abroad in the phosphate pump slurry pump structural design, material testing, sealing a great deal of research in areas such as research and development. In phosphoric acid slurry pump design, we must first solve the problem of corrosion and erosion wear or corrosion problems. Therefore, structural design and pump casing and impeller match each other should be special consideration.
Foreign phosphate slurry pump used in metallic materials, is based on a series of different media conditions. Domestic manufacturing facilities and research institutes were also a variety of materials corrosion and wear resistance of the research, to create their own ferritic stainless steel, duplex steel, austenitic stainless steel and other materials series. Nations, there are professional manufacturer phosphate slurry pump, but also have Chinese Academy of Sciences, universities, design institutes, research institutes will take part in research and development, the localization of phosphate slurry pump has been basically solved the problem.
China has built a large, medium and small-scale phosphate and compound fertilizer production projects, large and medium-sized unit of about a variety of slurry pump 30 to 40 units, medium and small device about all kinds of slurry pump 20 to 30 units, according to The average life expectancy for each pump for 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 still in progress, together with a number of small and medium ammonium phosphate renovation and expansion project, for domestic phosphate fertilizer pumps provide a broad market space.