Operational method for preventing mill of coal mill from being blocked
An operation method and technology of a coal mill, which are applied in the field of coal-fired boilers, can solve the problems of low efficiency of anti-blocking and wear of coal mills, etc.
Active Publication Date: 2015-11-18
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Problems solved by technology
[0003] Based on this, it is necessary to provide a coal mill anti-blocking and grinding operation method for the technical problem of low anti-blocking and grinding efficiency of the coal mill in the existing technology
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[0013] The specific implementation of the coal mill anti-clogging operation method of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0014] refer to figure 1 , figure 1 Shown is a flowchart of an embodiment of a coal mill anti-clogging grinding operation method, including the following steps:
[0015] S10, setting the inlet air volume of the coal mill according to the model of the coal mill and the historical inlet air volume data of the coal mill;
[0016] In the above step S10, the coal pulverizers generally have different models, and different models have different inlet air volumes.
[0017] In one embodiment, the inlet air volume of the above coal mill can be set to 18500m 3 / h (cubic meter per hour).
[0018] The inlet air volume of the coal mill can include the sum of the recirculation air volume in the DCS (coal pulverizer control system) and the primary air volume after mixing. Taking the coal mill in the b...
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The invention relates to an operational method for preventing a mill of a coal mill from being blocked. The operational method comprises the following steps: setting inlet air quantity of the coal mill according to the type of the coal mill and the historical inlet air quantity data of the coal mill of the type; detecting whether all coal powder manufactured by the coal mill can be blown out by inlet air set according to the inlet air quantity or not through starting the coal mill; if yes, detecting whether a wood scrap separator on a powder discharging pipeline of the coal mill drops or is opened or not; if yes, detecting whether an air-lift lock on a powder returning pipeline returns to a seat after the powder dropping of the coal mill or not; and if yes, operating the coal mill. According to the operational method for preventing the mill of the coal mill from being blocked disclosed by the invention, mill blocking resistant operation can be performed on the coal mill without operation stop and checking for a whole coal-fired boiler system specially, and the efficiency of the mill blocking resistant operation of the coal mill can be improved.
Description
technical field [0001] The invention relates to the technical field of coal-fired boilers, in particular to an anti-clogging and grinding operation method of a coal pulverizer. Background technique [0002] Whether the coal mill can work normally plays a decisive role in the normal operation of the coal-fired boiler system. During the working process of the coal mill, the air-powder mixture of the coal mill generally needs to pass through the coarse powder separator, the fine powder separator and the powder discharge fan, and the exhaust gas is injected into the furnace through the exhaust air. In the actual operation process, coal mill jamming accidents have occurred many times, and the above coal mill jamming accidents will affect the normal operation of the coal-fired boiler system. The existing coal mill anti-blocking and grinding methods generally require a more detailed investigation of the entire system on the premise that the entire coal-fired boiler system is stopp...
Claims
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Inventor 李德波许凯钟俊陈磊余岳溪刘亚明温智勇
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID