Pulverized coal preparation safety pre-alarm system

Abstract

The invention relates to a pulverized coal preparation safety pre-alarm system which comprises a pulverized coal preparation system composed of a pulverizer, a pulverized coal pipe and a stored pulverized coal cleaning system which are sequentially connected, the tail end of the stored pulverized coal cleaning system being connected with an air door of the pulverizer. The pulverized coal preparation safety pre-alarm system is characterized in that a flame-retardant protection pipe is connected between a feeding port of the pulverizer and the tail end of the pulverized coal pipe, to form a gas protection system, and flame-retardant protection gas is filled into the gas protection system or the pulverized coal preparation system through the flame-retardant protection pipe to conduct flame-retardant protection on the gas protection system or the pulverized coal preparation system. The flame-retardant protection pipes are installed at the two ends of the pulverizer and the two ends of the pulverized coal pipe, the pulverized coal preparation system or the gas protection system which is in a a whole closed loop can be formed through intelligent control of electromagnetic valves; the protection gas is introduced into the two systems, and the two systems are used in cooperation with sensors, so that flame-retardant and explosion-proof protection can be conducted on the two systems, and the amount of pulverized coal stored and sealing or not of the air door can also be detected; and the whole safety pre-alarm system is simple in structure, high in safety strength and rapid in early warning.

Description

technical field [0001] The invention belongs to the technical field of coal powder production, and in particular relates to a coal powder preparation safety pre-alarm system. Background technique [0002] Coal powder preparation is raw coal, which is transported to the raw coal bunker through the coal yard, fed into the coal mill equipment, and after being ground, it passes through the coal dust collector and is finally collected into the coal powder bin, which is used as the rotary kiln calcination fuel. reserve. Due to the inherent characteristics of coal, spontaneous combustion and explosion will occur during the preparation of coal powder, and the direct causes of spontaneous combustion and explosion are: [0003] 1. There is powder stored inside the coal mill. When the coal mill is shut down normally, if the powder stored in the mill and the powder pipe is not blown out in time, spontaneous combustion or explosion will occur when it is restarted or shut down; [0004]...

AI Technical Summary

Problems solved by technology

[0003] 1. There is powder stored inside the coal mill. When the coal mill is shut down normally, if the powder stored in the mill and the powder pipe is not blown out in time, spontaneous combustion or explosion will occur when it is restarted or shut down;

[0004] 2. The air door of the coal mill is not closed tightly, etc.

[0005] For this kind of powder storage detection and damper detection, there is no pre-alarm system that can test it at the same time, nor can it directly prevent spontaneous combustion and explosion

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