Anti-deposition device and method for inlet manifold in slurry high-pressure reciprocating pump

Abstract

The invention discloses an anti-deposition device for an inlet manifold in a slurry high-pressure reciprocating pump. The anti-deposition device comprises a scraper connecting rod, the scraper connecting rod is arranged in an inner cavity of the inlet manifold, a plurality of scraper blades are connected along the length direction of the scraper connecting rod, each scraper blade is of a strip plate structure, and each scraper blade is obliquely arranged. The inclined directions of the adjacent scraper blades are opposite, and the included angles between the adjacent scraper blades and the same side in the horizontal direction are complementary; the scraper connecting rod is connected with a connecting rod, the connecting rod is perpendicular to the scraper connecting rod, the connecting rod is further connected with a center shaft, the center shaft is parallel to the scraper connecting rod, one end of the center shaft is connected with a sealing shaft, and the sealing shaft penetrates through the wall face of the inlet manifold to be connected with a power mechanism; and the other end of the central shaft is rotationally connected with the inner wall of the inlet manifold. Solid particles are effectively prevented from staying and depositing in a single-point position in the inlet manifold for a long time without influencing the overall operation of the inlet manifold.

Description

technical field [0001] The invention belongs to the technical field of petrochemical and coal chemical production, in particular to an anti-sedimentation device and method for an inlet manifold in a slurry high-pressure reciprocating pump. Background technique [0002] With the continuous development of heavy crude oil processing technology and the breakthrough of direct coal liquefaction technology. The use of slurry high-pressure reciprocating pumps in chemical enterprises is increasing. Moreover, the high-pressure slurry reciprocating pump mainly adopts the bottom feeding method, mainly because the working principle and design requirements of the reciprocating pump determine that the feeding of the reciprocating pump must adopt the bottom suction feeding method. The sealing and disconnection of the medium suction and discharge of the reciprocating pump cylinder need to be realized by the gravity settlement of the valve ball. When inhaling, the pressure on the suction si...

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Problems solved by technology

[0009] However, the difficulty in solving the anti-sedimentation of the inlet pipeline of the high-pressure slurry reciprocating pump with the current technology lies in: (1) It is difficult to measure the viscosity, solid content, temperature, and medium flow rate of the solid-containing medium, although the index of high-viscosity medium can effectively improve the However, there is no equipment that can effectively detect the above-mentioned media indicators online

② The properties of the feed solvent are unstable, the components are complex, and the properties of the solid-containing medium cannot be stabilized. Usually, a lot of oil products of different properties such as heavy oil, dirty oil, and flushing oil will enter the feed medium during the production process of the device, and Phenomena such as the adjustment of the proportion of solid medium in the solid-containing medium lead to the fact that the material properties of the fed solid-containing medium cannot be stabilized at all.

The reason for evacuation is that the pressure head at the suction port of the piston is low. Although there is a dynamic pressure difference in the feed pipeline of the feed pump, due to the excessive return flow of the forced circulation, the fluid circulates inertially with the flow direction, and the pressure head at the piston suction port of the fluid vertical line The small size causes the medium to fail to fill the cylinder due to insufficient medium head at the suction port of the piston during the suction process of the feed pump, resulting in the phenomenon of piston liquid column cut-off

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