Chemical process pumps are the general term for various pumps in the chemical production process. There are many types of chemical process pumps, and they can be divided into vane pumps, positive displacement pumps, and rotary pumps according to their principle of action. According to the production process or product characteristics can be divided into high-pressure methylamine pumps, cryogenic pumps, phosphoric acid slurry pumps.
In recent years, with the development of economy, the variety of chemical products has been increasing, and new requirements have been put forward for the performance and quality of pump products. In the pump industry, Harbin Water Pump Factory first introduced the Japanese company Ebara's liquefied petroleum pump production technology, followed by Haibogeman Mechanical Sealing Company and Shenyang Pi-Pool Sealing Company, etc. They have also successively introduced advanced technologies from Germany, the United States, and Australia. Process and product production technology has solved the problem of "run, run, leak" of chemical equipment and has been welcomed by a large number of users.
Phosphoric acid slurry pump basically achieves localization
Phosphorus fertilizer production process requires the transmission of the medium are mainly phosphate slurry, phosphoric acid slurry, various filtrates, concentrated phosphoric acid dilute phosphoric acid, concentrated sulfuric acid, dilute sulfuric acid and fluorosilicic acid, etc., the pump is susceptible to corrosion or erosion of the media and erosion wear. Phosphoric acid slurry pump is a general term for various pumps in the production of phosphate fertilizers, and it is a representative type of pump that is resistant to corrosion and wear. In the early stages of the development of the phosphate fertilizer industry, some commonly used chemical corrosion-resistant pumps had a life of only one week. Therefore, experts at home and abroad pump industry have done a lot of research and development in the aspects of structural design, material testing, and seal research of phosphate slurry pumps. .
In the design of a phosphoric acid slurry pump, the first problem to be solved is corrosion resistance or corrosion and erosion. Therefore, special consideration should be given to the structural design and the matching between the pump casing and the impeller. The foreign metal materials used in the phosphoric acid slurry pump are based on different media conditions. Domestic manufacturers and research institutes also conducted research on corrosion resistance and wear resistance of various materials to create their own ferritic stainless steel, dual phase steels, and austenitic stainless steels. There are many professional manufacturers of phosphoric acid slurry pumps in China, as well as Chinese Academy of Sciences, universities, design institutes, and research institutes that are involved in scientific research and development. The localization of phosphate slurry pumps has now been basically solved.
In the large, medium and small-sized phosphorus compound fertilizer production projects that have been completed in China, there are about 30 to 40 slurry pumps for large and medium-sized plants, and about 20 to 30 slurry pumps for medium and small-sized plants. With an average life of six months per pump, the market space is relatively large. In addition, there are still some large-scale phosphate fertilizer production companies have just completed or infrastructure is still in progress, coupled with a number of small and medium-sized ammonium phosphate expansion and expansion projects for the domestic phosphate fertilizer pump provides a broad market space. High-pressure methylamine pumps mainly rely on imports
High-pressure methylamine pumps and high-pressure liquid ammonia pumps are the types of pumps that are subject to strong corrosion and technical difficulties in urea plants. In the medium and small urea plants, reciprocating plunger structures are often used. In large urea plants, multi-stage centrifugal and high-speed partial flow systems are often used. In recent years, there have been reciprocating structural pumps. The reciprocating pump unit is bulky, complex in structure, inconvenient to maintain, and the pump body is prone to fatigue cracking, but the operation is more reliable and the efficiency is higher. The high-speed partial flow pump adopts a two-stage radial impeller, and the rotational speed is as high as more than 14,000 revolutions per minute. The structure is compact and the operation is relatively stable. However, the problems of sealing and wear are relatively prominent and difficult to be solved. The multi-stage centrifugal pump is between the two, and its manufacturing difficulty is relatively low, the sealing structure is better, and it is more reliable. The development of these three types of high-pressure methylamine pumps has been carried out in China. There are no major problems in the manufacture and use of the high-pressure methylamine pumps, but the products are still mainly imported.
Domestic products have a competitive advantage
It is understood that China's chemical industry currently uses pumps, fans, valves three major categories of products, more than 85% are domestic equipment, a small part is imported equipment. One of the main reasons for imports is that domestic products can not meet the process requirements, as long as the domestic products can meet the requirements, the user is still the preferred domestic product; the second is the lack of bulk, mostly stand-alone, domestic re-development, no profit. There are also some users who do not understand or have prejudice on domestic equipment and do not specifically analyze it. Subjectively, they believe that foreign equipment is advanced, reliable, and blindly introduced. This is an irreplaceable obstacle in the localization of equipment.
In addition to these special reasons, chemical companies are mainly based in China when purchasing products. Because domestic equipment is very competitive in terms of price, especially in the price of spare parts and the timeliness of service, it has a more competitive advantage with foreign companies, and the ratio of quality and price becomes the basis for users to choose to introduce, or domestically produced. The price of general domestic pump equipment is only 50% of that of imported equipment of the same type, and the price difference of spare parts is greater. The biggest drawback of imported products is that it is difficult to change parts, the price is higher, and the product is not bad, as long as a bad one will cause the entire company to stop production.
Users prefer high quality and low price products
The equipment selected by Guangdong Jiantao Chemical Co., Ltd. and Guangdong Haotai Group, two major chemical companies, covers all the varieties of the entire corrosion-resistant pump, and is very representative in the chemical industry. For this reason, the author did a survey on the factors that they chose to consider when choosing a pump. According to investigations, at present, chemical companies do not adopt the form of open tendering when purchasing pump products. Instead, they use comparative methods. They even ask designers and manufacturers to directly conduct face-to-face technical exchanges. Finally, the user decides to purchase their own products. . In addition, the chemical industry first considers quality factors when purchasing products, followed by price factors, and finally considers after-sales services.
In recent years, with the development of economy, the variety of chemical products has been increasing, and new requirements have been put forward for the performance and quality of pump products. In the pump industry, Harbin Water Pump Factory first introduced the Japanese company Ebara's liquefied petroleum pump production technology, followed by Haibogeman Mechanical Sealing Company and Shenyang Pi-Pool Sealing Company, etc. They have also successively introduced advanced technologies from Germany, the United States, and Australia. Process and product production technology has solved the problem of "run, run, leak" of chemical equipment and has been welcomed by a large number of users.
Phosphoric acid slurry pump basically achieves localization
Phosphorus fertilizer production process requires the transmission of the medium are mainly phosphate slurry, phosphoric acid slurry, various filtrates, concentrated phosphoric acid dilute phosphoric acid, concentrated sulfuric acid, dilute sulfuric acid and fluorosilicic acid, etc., the pump is susceptible to corrosion or erosion of the media and erosion wear. Phosphoric acid slurry pump is a general term for various pumps in the production of phosphate fertilizers, and it is a representative type of pump that is resistant to corrosion and wear. In the early stages of the development of the phosphate fertilizer industry, some commonly used chemical corrosion-resistant pumps had a life of only one week. Therefore, experts at home and abroad pump industry have done a lot of research and development in the aspects of structural design, material testing, and seal research of phosphate slurry pumps. .
In the design of a phosphoric acid slurry pump, the first problem to be solved is corrosion resistance or corrosion and erosion. Therefore, special consideration should be given to the structural design and the matching between the pump casing and the impeller. The foreign metal materials used in the phosphoric acid slurry pump are based on different media conditions. Domestic manufacturers and research institutes also conducted research on corrosion resistance and wear resistance of various materials to create their own ferritic stainless steel, dual phase steels, and austenitic stainless steels. There are many professional manufacturers of phosphoric acid slurry pumps in China, as well as Chinese Academy of Sciences, universities, design institutes, and research institutes that are involved in scientific research and development. The localization of phosphate slurry pumps has now been basically solved.
In the large, medium and small-sized phosphorus compound fertilizer production projects that have been completed in China, there are about 30 to 40 slurry pumps for large and medium-sized plants, and about 20 to 30 slurry pumps for medium and small-sized plants. With an average life of six months per pump, the market space is relatively large. In addition, there are still some large-scale phosphate fertilizer production companies have just completed or infrastructure is still in progress, coupled with a number of small and medium-sized ammonium phosphate expansion and expansion projects for the domestic phosphate fertilizer pump provides a broad market space. High-pressure methylamine pumps mainly rely on imports
High-pressure methylamine pumps and high-pressure liquid ammonia pumps are the types of pumps that are subject to strong corrosion and technical difficulties in urea plants. In the medium and small urea plants, reciprocating plunger structures are often used. In large urea plants, multi-stage centrifugal and high-speed partial flow systems are often used. In recent years, there have been reciprocating structural pumps. The reciprocating pump unit is bulky, complex in structure, inconvenient to maintain, and the pump body is prone to fatigue cracking, but the operation is more reliable and the efficiency is higher. The high-speed partial flow pump adopts a two-stage radial impeller, and the rotational speed is as high as more than 14,000 revolutions per minute. The structure is compact and the operation is relatively stable. However, the problems of sealing and wear are relatively prominent and difficult to be solved. The multi-stage centrifugal pump is between the two, and its manufacturing difficulty is relatively low, the sealing structure is better, and it is more reliable. The development of these three types of high-pressure methylamine pumps has been carried out in China. There are no major problems in the manufacture and use of the high-pressure methylamine pumps, but the products are still mainly imported.
Domestic products have a competitive advantage
It is understood that China's chemical industry currently uses pumps, fans, valves three major categories of products, more than 85% are domestic equipment, a small part is imported equipment. One of the main reasons for imports is that domestic products can not meet the process requirements, as long as the domestic products can meet the requirements, the user is still the preferred domestic product; the second is the lack of bulk, mostly stand-alone, domestic re-development, no profit. There are also some users who do not understand or have prejudice on domestic equipment and do not specifically analyze it. Subjectively, they believe that foreign equipment is advanced, reliable, and blindly introduced. This is an irreplaceable obstacle in the localization of equipment.
In addition to these special reasons, chemical companies are mainly based in China when purchasing products. Because domestic equipment is very competitive in terms of price, especially in the price of spare parts and the timeliness of service, it has a more competitive advantage with foreign companies, and the ratio of quality and price becomes the basis for users to choose to introduce, or domestically produced. The price of general domestic pump equipment is only 50% of that of imported equipment of the same type, and the price difference of spare parts is greater. The biggest drawback of imported products is that it is difficult to change parts, the price is higher, and the product is not bad, as long as a bad one will cause the entire company to stop production.
Users prefer high quality and low price products
The equipment selected by Guangdong Jiantao Chemical Co., Ltd. and Guangdong Haotai Group, two major chemical companies, covers all the varieties of the entire corrosion-resistant pump, and is very representative in the chemical industry. For this reason, the author did a survey on the factors that they chose to consider when choosing a pump. According to investigations, at present, chemical companies do not adopt the form of open tendering when purchasing pump products. Instead, they use comparative methods. They even ask designers and manufacturers to directly conduct face-to-face technical exchanges. Finally, the user decides to purchase their own products. . In addition, the chemical industry first considers quality factors when purchasing products, followed by price factors, and finally considers after-sales services.
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