An automatic dust suppression system and method at the coal unloading point of the lifting shaft

Abstract

An automatic dust reduction system and method at a coal unloading point in a lift shaft. The system: two dust collection mechanisms are respectively arranged on the left and right sides of the lift shaft; Dust concentration sensor and gas concentration sensor; the axial flow fan is connected with two dust collection mechanisms through the dry dust collector; the feeding end of the screw conveyor is set under the dry dust collector; method: the dust concentration sensor monitors the wellhead of the lifting well in real time The dust concentration in the vicinity is sent to the controller; the average dust concentration on both sides is determined, and the axial flow fan is started according to the situation; the working state of the axial flow wind speed is controlled according to the actual situation, and the opening and closing of the damper is controlled and adjusted according to the gas concentration; according to the dust accumulation The state controls the action of the pulse valve. The system can eliminate the dust at the shaft tower during the process of coal lifting and unloading, and can control the dust overflow, which is beneficial to protect the atmospheric environment in the surrounding area and the health of personnel; the method has high dust removal efficiency and good dust reduction effect.

Description

technical field [0001] The invention belongs to the technical field of dust suppression at the head of a hoisting well, in particular to an automatic dust suppression system and method at a coal unloading point of a hoisting well. Background technique [0002] Coal mine shaft hoisting system is responsible for the hoisting task of mine raw coal, and a large amount of dust will be generated during the process of coal hoisting and dumping. The dust diffuses in the surrounding environment of the lifting shaft coal unloading point. On the one hand, it brings the safety hazard of dust explosion, on the other hand, it poses a serious threat to the health of surrounding workers and pollutes the surrounding air environment. At present, combined with the actual situation of the vertical shaft and tower, coal mining enterprises mostly use spraying and watering dust removal technology. After on-site practice, it was found that this dust removal method has the following deficiencies: (...

AI Technical Summary

Problems solved by technology

After on-site practice, it was found that this dust removal method has the following deficiencies: (1) the dust removal rate is low, especially for respirable dust purification efficiency is extremely low (<50%), and it is difficult to meet occupational health requirements; (2) the dust removal The method consumes a lot of water, which is easy to deteriorate the quality of coal, and it is easy to cause corrosion of the hoisting device of the main shaft, which increases the potential safety hazards of the system; (3) In winter, the spraying water pipe is easy to freeze, and the sprayed and leaked accumulated water is easy to cause the ground to freeze. Restricted; (4) The dust emission concentration at the shaft tower cannot meet the national requirements for dust control in coal enterprises

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