Low-pressure centrifugal coal slurry pump

Abstract

A low-pressure centrifugal coal slurry pump comprises a pump base, a water inlet elbow and a pump body. The pump body is arranged on the pump base, a pump cover is built in the pump body, a water outlet volute and a water outlet pipe are sequentially arranged at the left end of the pump cover, and the water inlet elbow, a water inlet short pipe and a water inlet pipe are sequentially arranged at the lower end of the pump cover. A pump shaft penetrates through a pump bracket and the pump body, one end of the pump shaft is connected with an impeller of the pump cover in a linkage mode, and the other end of the pump shaft is supported by two sets of bearings. Mechanical seals are arranged on the pump bracket, on the pump shaft in the pump body and between quench guide vanes and the bearings. The low-pressure centrifugal coal slurry pump meets the ISO28258 international standard and the API610 standard and is used for conveying media of which the solid content can be up to 65%, and the medium temperature is lower than or equal to 150 DEG C. New material, new technologies and high-quality accessories are adopted for a whole set of system to ensure stability and reliability of working of the system. The low-pressure centrifugal coal slurry pump has the advantages of being low in price, reasonable in structure, wide in range of flow regulation, easy to operate, convenient to assemble and disassemble and the like and can meet requirements for conveying coal slurry in the coal chemical industry and be used in the working condition of high solid content in the chemical industry.

Description

technical field [0001] The invention relates to a pump, in particular to a low-pressure centrifugal coal slurry pump. Background technique [0002] With the rapid development of "coal to oil" in the world, my country took the lead in developing the "coal to oil" direct liquefaction industrialization device, of which the coal slurry pump is one of the key equipment. Traditional coal slurry pumps are suitable for transporting solid-liquid mixtures with strong abrasiveness and solid solid particles, such as ore pulp, ash, cement slurry, mortar, gravel, etc. The above-mentioned impurities usually contain 3-5%, in In the desulfurization process of power plants, the carbon residue content can reach 30%. However, the operating environment of "coal-to-oil" is very harsh, and the solid content of pulverized coal is as high as 48.3%. In order to adapt to the use in this harsh environment, a new type of coal slurry pump must be developed to solve the problem of solid deposition and bl...

AI Technical Summary

Problems solved by technology

However, the operating environment of "coal-to-oil" is very harsh, and the solid content of pulverized coal is as high as 48.3%. In order to adapt to the use in this harsh environment, a new type of coal slurry pump must be developed to solve the problem of solid deposition in a certain area and to ensure reliable sealing. It is possible to carry out normal work only if there are no permanent problems, and the traditional coal slurry pump must be improved

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