Control method for inhibiting deflagration of high volatile coal

Abstract

The invention discloses a control method for inhibiting deflagration of high-volatile coal, which comprises the following steps of: 1, judging and automatically processing a deflagration accident of a coal mill: monitoring the pressure of an inlet and an outlet of the coal mill and the temperature of an outlet of the coal mill, and when the differential pressure change of the inlet and the outlet of the coal mill and the temperature rise condition of the outlet of the coal mill are met, controlling the deflagration accident of the coal mill; the coal mill deflagration accident alarm system is triggered while the coal mill automatic fire extinguishing steam device is automatically started; 2, automatic purging of the coal mills and the pulverized coal pipes: monitoring the air speed of the pulverized coal pipe at the outlet of any one coal mill, and when the air speed is lower than a set value, triggering an automatic purging device of the coal pulverizing system to start to purge the pulverized coal pipe at the outlet of the coal mill; and 3, monitoring the wind speed of the pulverized coal pipeline: increasing wind speed measuring points on the pulverized coal pipeline. By arranging a series of structures, the running reliability of power plant equipment is improved, the blending combustion amount of imported economic coal types is increased, the fuel cost of a power plant is reduced, and huge benefits can be created for the power plant.

Description

technical field [0001] The invention relates to the technical field of deflagration control of coal pulverizers, in particular to a control method for suppressing deflagration of coal with high volatile content. Background technique [0002] In recent years, major domestic power plants have been affected by factors such as the national coal industry's capacity reduction policy, and coal prices have risen too fast, resulting in the purchase of large quantities of high-volatile imported coal by power plants. , seriously affecting the safe operation of the unit. A coal mill is a machine that breaks coal and grinds it into coal powder. It is an important auxiliary equipment for pulverized coal furnaces. The coal grinding process is the process in which coal is broken and its surface area is continuously increased. To add new surface area, the bonding forces between solid molecules must be overcome, thus expending energy. Coal is ground into pulverized coal in a coal mill, mai...

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Problems solved by technology

[0003] At present, the volatile content of imported coal types is relatively high, and the power plants using medium-speed direct-blown coal mills have a high probability of deflagration when burning high-volatility coal types, which cannot fully adapt to the blending of new coal types, posing a greater threat to safety production. The cost of fuel procurement increases, so the present invention provides a control method for suppressing the deflagration of high-volatile coals to solve the above problems

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