Automatic coal dredging device for raw coal conveying system in thermal power plant

Abstract

The invention discloses an automatic coal dredging device for a raw coal conveying system in a thermal power plant. The automatic coal dredging device comprises a plurality of air jet holes and an air supply system, the air jet holes are formed in the inner wall of a raw coal conveying system device, the air supply system is communicated with the air jet holes through air pipelines, and the operating state of the air supply system is changed by a control system. The automatic coal dredging device is simple in structure, convenient to operate, low in cost, high in economic performance and safe and reliable in operation, less vibration is generated, and normal operation of other devices cannot be affected. By the aid of the automatic coal dredging device, the problem of coal blockage failure due to various reasons is fundamentally and thoroughly solved, and normal coal supply of a coal feeder and normal operation of a subsequent device are ensured.

Description

technical field [0001] The invention relates to the field of coal transportation in thermal power plants, in particular to a dredging device for dredging coal materials. Background technique [0002] The normal operation of the pulverizing equipment in the boiler system of a thermal power plant is the key to the normal combustion of the boiler. Whether the coal feeding is normal or not directly affects the treatment of the pulverizing system and the stable combustion of the boiler. Therefore, during the normal operation of the boiler, the normal operation of the conveying system is sufficient. Quantity of coal supply is crucial. The raw coal conveying system 1 includes a raw coal hopper 11 for storing raw coal, a coal feeder 15 which is connected to the coal outlet of the raw coal scuttle through a variable diameter pipe 12 and a coal falling pipe 14 in turn, and a feeder is arranged between the variable diameter pipe 12 and the coal falling pipe 14. Coal machine inlet gate...

AI Technical Summary

Problems solved by technology

The raw coal conveying system 1 includes a raw coal hopper 11 for storing raw coal, a coal feeder 15 which is connected to the coal outlet of the raw coal scuttle through a variable diameter pipe 12 and a coal falling pipe 14 in turn, and a feeder is arranged between the variable diameter pipe 12 and the coal falling pipe 14. Coal machine inlet gate valve 13, under the lower coal inlet of coal feeder 15, there is a conveyor belt 16 for conveying raw coal to the coal mill, and the raw coal in the raw coal bucket falls from the coal outlet of the raw coal bucket to The coal feeder is then conveyed to the coal mill through the conveyor belt under the coal feeder. During the raw coal transmission process, the raw coal in the raw coal hopper is often caused by high ash content and high viscosity, especially in the rainy season. There is a backlog of raw coal on the upper part of the coal feeder, which causes the blockage of the raw coal hopper and cannot ensure sufficient coal feeding, resulting in a reduction in the amount of coal entering the coal mill, affecting the operation of the coal mill and subsequent equipment, and further causing unstable combustion of the boiler. The load reduction of the unit reduces the safe and economical operation efficiency of the boiler

[0003] At present, during the normal operation of the coal feeder, the following three methods are often used to deal with coal blocking phenomenon: 1) The method of beating with a vibrator has the disadvantage of large vibration, which easily affects the operation of other equipment, and the work efficiency is not good. High, sometimes there is a defect that the vibration becomes more solid, and even the anti-blocking coal liner on the coal hopper wall is loosened, causing more serious consequences

2) Using the method of manual beating with a sledgehammer, the sledgehammer is easy to damage the equipment, and the labor intensity is high. Even the more vibrated, the stronger the coal block, which not only reduces the operation efficiency, but may even pose a threat to the safety of the staff.

3) The disadvantage of using air cannon or dredging machine is that the efficiency is not high and the workload of operation and maintenance is heavy

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