Ground slurry preparing system for preventing and extinguishing fire of coal mine

Abstract

The invention relates to a ground slurry preparing system for preventing and extinguishing fire of a coal mine. Through the system, clay or fly ash and other slurry making raw materials and water are fully mixed, and the concentration of slurry is controllable. The system sequentially comprises a quantitive feeder, a belt conveyor, a slurry preparing machine and a slurry filter end to end, wherein the slurry preparing machine is provided with a cage type roller which partly immerses into a slurry box and a drive device thereof; the outer circumference of the cage type roller is provided with a filter screen and two longitudinal slurry discharging plates; the inner circumference of the cage type roller is provided with a plurality of longitudinal slurry stirring plates; the longitudinal slurry discharging plates and the longitudinal slurry stirring plates are symmetrically distributed along the circumference of the cage type roller; the lateral surface of the slurry box is provided with a slurry overflow opening; a slurry discharging pipe is connected with the slurry overflow opening; a slurry discharging pipe body is provided with a suspending agent quantitive adding device; a drop guide funnel is arranged at one end of the cage type roller; and a sludge discharge opening is arranged on the lateral surface of the other end part of the cage type roller.

Description

technical field [0001] The invention relates to the technical field of fire prevention and extinguishment of coal mine spontaneous combustion fire, in particular to a ground pulping system for coal mine fire prevention and extinguishment. Background technique [0002] Grouting is one of the commonly used methods in coal mine fire extinguishing at present. It is to inject the prepared mud or fly ash into the coal seam fire area, and realize fire extinguishing by cooling down and oxygen barrier. The preparation of mud is to mix loess or fly ash and other pulping raw materials with water, and then enter the grouting pipeline after filtering. At present, the grouting method of the ground grouting station is: use a high-pressure water gun to wash down the mud on the mound, make it flow into the concentrated grout ditch, filter through the filter screen, and then flow into the mud mixing tank after removing debris, and then enter the grout after being stirred by the mixer. Slurry...

AI Technical Summary

Problems solved by technology

In this method, the concentration of the mud cannot be controlled because the amount of water cannot be controlled.

Due to the limited contact time between pulping raw materials and water, the fusion of the two is uneven, and there is still a large amount of undissolved soil in the filtered dross. Not only the pulping effect is not very ideal, but also the utilization rate of pulping raw materials is low and cannot be continued. pulping

In addition, during the construction, the soil field and the slurry storage tank occupy a large area and require a large investment, and the artificial slag removal of the filter screen is labor-intensive and low-efficiency

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