Relay pressurizing method and device for long distance pipeline transport solid/liquid mixture

Abstract

The present invention discloses one kind of relay pressurizing method and apparatus for long distance pipeline transport of solid / liquid mixture, and solves the technologic problem of continuous, stable, economic and safe transport. On the transport pipeline, one solid / liquid mixture fluid passage is connected serially, pressurizing pump is used to pressurize separated liquid, and the pressurized liquid is then jetted to the solid / liquid mixture in several points. The relay pressurizing apparatus has less resistance to solid / liquid mixture and high kinetic energy transfer effect. The present invention is suitable for pipeline transportation in different topographic conditions, may be used in transporting solid / liquid mixture with high concentration and large grain size solid component in great flow rate and for long distance, and has the features of high system stability, high safety, low power consumption, etc.

Description

Technical field [0001] The present invention relates to pipeline transportation of solid-liquid mixture, more specifically relates to a method and a device for relaying pressurization of remote pipeline transportation of solid-liquid mixture by using a high-lift water pump as a power source. Background technique [0002] When the solid-liquid mixture is transported by pipeline, the liquid is only used as a carrier because of its good fluidity. The main purpose is to transport solids. It has the advantages of low transportation cost, no pollution, low failure rate of continuous transportation, relatively small equipment and engineering investment, etc. , widely used in some fields such as power plant slag discharge, beach backfilling of river beaches, etc. [0003] However, the existing pipelines transport solid-liquid mixtures, especially for transporting large-flow, high-concentration, and large-particle-size solid-liquid mixtures. The flow rate is large, the solid content ...

AI Technical Summary

Problems solved by technology

[0003] However, the existing pipelines transport solid-liquid mixtures, especially for transporting large-flow, high-concentration, and large-particle-size solid-liquid mixtures. The flow rate is large, the solid content is high, and the solid particle size is uneven. There are the following difficulties in remote transportation: First of all, in the entire pipeline, it is necessary to ensure that the fluid velocity at any point must be greater than the sedimentation velocity of the solid, otherwise the solid will settle in the pipeline, especially in the rising section of the pipeline, the difference in solid density and particle size Under the action of gravity, the solids will generate a downward acceleration of gravity, resulting in a change in the linear velocity between the solids, which will easily cause the local solid content to increase and block the pipeline

Secondly, the transportation pipelines are distributed in a staggered manner according to the terrain level, rising and falling, and the transportation requirements on the way are higher. The solid-liquid mixture is at the turning point. The centrifugal force generated by the solid will cause the solid to hit the wall and rub, and the solid-liquid ratio is relatively uneven. Resistance or even pipe blockage; in the ascending section and descending section, especially when the drop is large, the pressure drop and pressure rise increase sharply, and the pressure at the lowest part is too high, which puts forward higher requirements for the pressure resistance and cost of the pipeline

Furthermore, the biggest difficulty is that the pressurized water pump cannot be connected in series in the pipeline like pure liquid, because large particle size solids or high concentrations of fine solids will block the pump cavity and impeller

Therefore, the existing technology still cannot completely solve the continuous and stable transportation, and more importantly, it cannot completely solve the contradiction between the economy and safety of transportation.

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