Fire preventing and extinguishing pulping device

Abstract

The invention relates to a fire preventing and extinguishing pulping device. The device comprises a mixing barrel, a stirring and conveying mechanism, a driving mechanism, a feeding mechanism and a spraying device. The mixing barrel is obliquely arranged so that the end provided with the feeding port is lower than the other end provided with the slurry outlet, each of the three double-helical-ribbon stirring shafts comprises a rotating shaft rotationally assembled at the two ends of the mixing barrel and a double-helical-ribbon structure arranged around the rotating shaft, each double-helical-ribbon structure comprises two helical ribbons, the outer diameters of the two helical ribbons are different, the first double-helical-ribbon stirring shaft is located on the lower layer and close to the inner wall of the lower portion of the mixing barrel, the second double-helical-ribbon stirring shaft and the third double-helical-ribbon stirring shaft are located on the upper layer to form an inverted-delta-shaped arrangement structure, the rotating directions of the first double-helical-ribbon stirring shaft and the second double-helical-ribbon stirring shaft are opposite, and the rotating directions of the second double-helical-ribbon stirring shaft and the third double-helical-ribbon stirring shaft are the same, and materials on the upper layer and the lower layer are driven to flow in different directions; the spraying device is arranged at the upper part of the mixing barrel along the length direction of the mixing barrel. The device has the advantages of high pulping efficiency, uniform mixing during pulping and high pulp quality.

Description

technical field [0001] The invention relates to a fire-proof pulping device. Background technique [0002] Spontaneous combustion of pulverized coal in coal mines is one of the causes of coal mine fires. One of the solutions is to inject grout into the gobs of coal mines to isolate the pulverized coal from the air and solve the safety hazard of spontaneous combustion of pulverized coal. Coal mine grouting fire protection technology is to mix loess or fly ash, tailings, etc. with water in a certain proportion to make a uniform slurry, which is transported to the fire treatment area for grouting fire prevention. The pulping effect directly affects the reliability of fire protection, so the prerequisite for reliable fire protection in coal mines is that water and materials are fully and evenly mixed. [0003] The traditional pulping method is to use a high-pressure water gun to wash down the mud from the mound, flow into the mud ditch, remove the sundries, and then enter the m...

AI Technical Summary

Problems solved by technology

[0003] The traditional pulping method is to use a high-pressure water gun to wash down the mud from the mound, flow into the mud ditch, remove the sundries, and then enter the mud mixing tank. After being stirred by the mixer, the slurry is formed and injected into the slurry delivery pipeline. This method cannot control the amount of water, so the concentration of the slurry cannot be controlled. Control, due to the short contact time of the pulping material with water, there is still a large amount of unmelted soil in the filtered slurry, the pulping effect is not ideal and the utilization rate of the pulping material is low, and in the cold area of ​​the north, it cannot be done outdoors. Scouring operation, and the external soil field and mixing tank occupy a large area, and the labor intensity of the workers is high

[0004] For this reason, some stirring and mixing equipment also appear on the market, for example, by arranging a stirring paddle in the container, the stirring paddle includes a stirring shaft and a stirring rod radially arranged on the stirring shaft, after adding water and materials, the stirring paddle It stirs to mix water and materials. Due to the single structure of the stirring paddle, only those near the stirring rod can be stirred, and because the stirring rod only rotates on one cross section, the mixing between materials of different layers is slow. , and it is prone to dead angles, which makes the mixing of materials uneven, and there are still many undissolved materials that form "pimples", which affects the use of slurry; in addition, due to the large demand for slurry on site, the mixing of such equipment The efficiency is low. If feeding continuously, it will cause the material to mix more unevenly. If feeding intermittently, the pulping efficiency will be lower

Images