A safety system and method for ensuring the process of pulverized coal preparation

Abstract

The invention discloses a safety system and method for ensuring the preparation process of coal powder, including a coal powder preparation system and a safety system including a limestone silo, a weighing screw conveyor, a limestone unloading valve, a limestone Roots blower, and a pneumatic two-way valve and limestone tank car joint, the safety system can transport limestone powder to coal mill, cloth bag collector and coal powder bin, the main component of limestone is calcium carbonate, covering the surface of coal powder can isolate air and coal The contact with the powder plays the role of isolating oxygen, and the safety system is the key to ensure the safety of the coal powder preparation process. Compared with the prior art, the present invention has the advantages of being able to ensure the safety of the pulverized coal preparation system when the amount of oxygen is high during the start-up and stop process, to ensure the safety of the pulverized coal preparation process, and to ensure that the pulverized coal remains in the pulverized coal bin. Safe storage can eliminate spontaneous combustion caused by powder storage in dead corners in the pulverized coal preparation system.

Description

technical field [0001] The invention relates to the technical field of safety systems and methods thereof, in particular to a safety system and method for ensuring the preparation process of pulverized coal. Background technique [0002] Safety has always been a key issue in the coal powder preparation process. Especially after the pulverized coal is in contact with the air, the oxidation reaction of the pulverized coal is accelerated, which causes the pulverized coal to spontaneously ignite. The method for ensuring safety in the pulverized coal preparation process of the prior art is to use a carbon dioxide fire extinguishing device. When there is danger in the system, spray carbon dioxide to inert the fire. However, when the pulverizing preparation system is just started or stopped, the oxygen content in the system is high, the risk factor is the greatest, and the carbon dioxide fire extinguishing system has no effect. Moreover, there will be powder accumulation in the ...

AI Technical Summary

Problems solved by technology

However, when the pulverizing preparation system is just started or stopped, the oxygen content in the system is high, the risk factor is the largest, and the carbon dioxide fire extinguishing system has no effect

Moreover, there will be powder accumulation in the pulverized coal preparation system, it is difficult to clean the system pipeline, and spontaneous combustion will occur for a long time

[0003] The deficiencies in the original technology are as follows: (1) The safety of the pulverized coal preparation system in the process of starting and stopping the high oxygen content cannot be guaranteed

(2) Failure to eliminate the spontaneous combustion caused by the dead corner powder storage in the pulverized coal preparation system

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