Overview of the development trend of slurry pump products
The pipeline hydraulic transportation technology of solid materials has a long history, while the long-distance pipeline transportation technology developed rapidly in the 1950s. Due to the advantages of high efficiency, less land occupation, low cost and no pollution, this conveying method has been paid more and more attention by people. The United States, Brazil, Japan, the former Soviet Union, South Africa, Canada and other countries have successively built a number of solid material hydraulic transmission pipelines. According to the introduction of Reference 92, from the 1950s to the early 1980s, there were 28 slurry transportation pipelines that were put into operation, with a maximum length of 440km. According to reports, the Wyoming-Arkansas coal pipeline planned to be put into operation in the United States in 1979 is 1670km long, with an annual coal transportation capacity of 25 million tons. It is also reported that the coal transportation pipeline of ETST Energy Systems in the United States is 2,500km long, with an annual coal transportation capacity of 3.7 million t. It was originally planned to be completed in 1985. In 1980, the Soviet Union conducted a feasibility analysis on the Kuzbass coal pipeline.
The slurry delivery concentration has developed from Cw = 40% to 60% in the 1950s to Cw = 60% to 70% in the early 1980s.
Due to the development of pipeline transportation technology, the demand for various types of solid-liquid pumps, which is an indispensable key equipment for the hydraulic transportation of solid materials in pipelines, is increasing.
According to incomplete statistics, there are more than 300 foreign companies specializing in the production of solid-liquid pumps. Many of these manufacturers are Australian Warman (Warman) International Equipment Company, American Goulds (Goulds) Pump Company, Worthngton (Worthngton) Pump Company, Holthus (Holland) Company, Germany Wirth (Wirth) Company All kinds of solid-liquid pumps produced by KSB and other manufacturers have advanced design, reasonable structure, high efficiency and long life. They are widely used in conveying projects of various materials and enjoy a high reputation in the world.
At present, various industries and other departments mainly use four types of solid-liquid pump products - centrifugal pump, reciprocating pump, diaphragm pump and screw pump. Among these four categories of solid-liquid pump products, centrifugal pumps account for the vast majority (about 80% of the pump used). The total investment cost and manufacturing cost are low, the disassembly and assembly are convenient, and there is a blocking pad applied to long-distance pipelines. In recent years, Shiji plunger mud pump, Mars pump, piston diaphragm pump, oil or water isolation mud pump, etc. have been developed, causing people's attention. The total investment cost of this type of pump is 2 to 5 times that of a centrifugal pump, but the maintenance and operation costs are low, and it is suitable for transporting high-concentration abrasive slurries such as concentrates and tailings in long-distance pipelines.
With the development of the national economy, the demand for solid-liquid pumps is increasing, and the requirements for the range of specifications and performance are also increasingly extensive. At the same time, great progress and great development have been made in the theoretical research, product development, manufacturing and product quality level of slurry pump. As far as the centrifugal slurry pump product itself is concerned, the positive ones are developed in terms of high quality, large flow, high efficiency, long life, many varieties, wide performance, high degree of sanitation and rational use.