Coal mill explosion-proof detection system and method for coal-fired boiler of generator set

Abstract

The invention discloses a coal mill explosion-proof detection system and method for a coal-fired boiler of a generator set, and belongs to the technical field of coal mills. The system comprises a coal mill body, an inert gas pipe and a control center, the coal mill body is provided with an inlet hot air pipe, a pulverized coal outlet pipe and a raw coal inlet pipe, and a pulverized coal concentration detector and an oxygen analyzer are arranged in the coal mill body; and the inert gas pipe is connected with the inlet hot air pipe, and the pulverized coal concentration detector and the oxygenanalyzer are correspondingly connected with the control center. The method comprises the steps that the pulverized coal concentration and the oxygen volume content which are detected in real time aretransmitted to the control center, and if the pulverized coal concentration and / or the oxygen volume content are / is abnormal values, the control center controls the inert gas pipe to input inert gas into the coal mill body. The system and method overcomes the defect that in the prior art, the explosion mode of the coal mill is poor in effect by detecting the concentration of CO, the concentrationof pulverized coal and the volume content of oxygen can be detected, and therefore safe and stable operation of the coal mill is guaranteed.

Description

technical field [0001] The invention relates to the technical field of coal pulverizers, and more specifically, relates to a coal pulverizer explosion-proof detection system and method for a coal-fired boiler of a generating set. Background technique [0002] The coal pulverizer of the coal-fired boiler of the generator set is a typical fuel pulverization system, and its function is to pulverize the coal and increase the contact area between the coal and the air. After the lump coal, which is chemically stable in the natural state, is ground and mixed with air, it forms a mixture of oxidizing agent (oxygen in the air) and reducing agent (char in coal powder) - pulverized coal flow. In order to improve the efficiency of fuel use, technicians are always trying to grind coal powder as fine as possible. This is because the finer the coal powder, the larger the surface area in contact with the air, and the more intensified the oxidation reaction with oxygen in the air, but at th...

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the disadvantages of the prior art that avoiding the coal mill explosion by detecting the CO concentration is ineffective, and the invention provides a coal mill explosion-proof detection system and method for a coal-fired boiler of a generating set, which can Detect the concentration and oxygen volume content of pulverized coal, so as to effectively prevent the spontaneous combustion and explosion of the coal mill, and then ensure the safe and stable operation of the coal mill

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