Pulping system for preventing coal autoignition

Abstract

The invention discloses a slurry preparation system for preventing the spontaneous combustion of coal, which is applicable to mines having serious spontaneous combustion disasters of the coal and needing to inject and spray fire prevention and extinguishment slurry to the underground for producing various mixed slurries taking clay and cement as main compositions. The clay is conveyed into a slurry preparation machine (4) by a belt conveyor (3), a coarse slurry pond (14) and a fine slurry pond (16) which are provided with stirring machines (5, 8) and submersible sewage pumps (6, 9) are arranged after the slurry preparation machine (4), a sand removing machine (7) is arranged between the coarse slurry pond (14) and the fine slurry pond (16), and clay slurry output by the fine slurry pond (16) is matched with cement and is sent into a stirring slurry-suction pond (17) for stirring to finish the whole slurry preparation process. In the slurry preparation system, the operation of a plurality of devices is controlled by a computer control system; and the slurry preparation system produces the clay slurry through processes such as the crushing to the clay, secondary stirring, sand removal and so on, can produce the clay slurry into mixed slurries by adding the cement and various additives, and is simple to control, convenient to operate, safe and reliable.

Description

technical field [0001] The invention relates to a pulping system for preventing and controlling coal spontaneous combustion, which is suitable for mines where the coal spontaneous combustion disaster is serious and needs to inject and spray anti-fire extinguishing slurry underground to produce various mixed slurry mainly composed of clay and cement. Background technique [0002] Mine spontaneous combustion fire is one of the main disasters in coal mine production. In order to prevent the occurrence of mine spontaneous combustion and extinguish spontaneous combustion fire, grouting into the goaf and spraying the roadway wall are one of the commonly used measures. Pulping plays an important role in grouting work. The speed of slurrying and whether the slurry can be prepared according to the designed ratio determine the effect of downhole spraying and grouting. At present, mine pulping systems mainly include underground mobile pulping systems and ground fixed pulping systems. ...

AI Technical Summary

Problems solved by technology

The underground mobile pulping system has a small amount of pulping, a large amount of material transportation, low work efficiency, and the operation is limited by the underground space; most of the ground fixed pulping systems have only one mixing tank, and the materials required for pulping are manually fed into the pulping machine. A certain amount of water is injected into the slurry tank and then stirred by a mixer to make slurry. This kind of pulping system has slow pulping speed, low work efficiency, high labor intensity, and the material cannot be accurately measured. Design ratio to make the required slurry

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