A double-inlet and double-outlet coal mill output measurement optimization method, system and medium

Abstract

The invention discloses a method, system and medium for output metering optimization of a double-inlet and double-outlet coal pulverizer. Based on the state analysis of the flame radiation intensity, the invention obtains the correction coefficient C of the metering value of the coal amount entering the furnace of the current powder pipe, and then compares it with the measurement value C of the coal amount of the current powder pipe. The measurement value R of the coal amount into the furnace obtained by the measurement method 0 Multiply as the first candidate value of the current powder pipe, and select R according to the operation of the coal feeder 0 Or 0 is used as the second candidate value, and the third candidate value is designed to be 0; according to the first selection rule, one of the first candidate value, the second candidate value, and the third candidate value is selected as the measurement value of the coal amount of the current powder pipe. Q i , and then calculate the sum of the measured values ​​of coal into the furnace for all the powder pipes of the coal mill to obtain the total measured value of coal into the furnace Q of the coal mill. The invention can judge the actual output of the coal mill according to the diagnosis result of the flame radiation intensity, and based on this, the measurement of the coal input into the furnace can be corrected, so that the automatic adjustment quality of the unit and the economical level of operation can be effectively improved.

Description

technical field [0001] The invention relates to the control and measurement engineering technology of a thermal power generation unit, in particular to a method, system and medium for output measurement optimization of a double-inlet and double-outlet coal mill. Background technique [0002] Confined to my country's energy structure, many power plant boilers are faced with the dilemma of being unable to use the designed coal, unstable sources of coal, and variable coal quality. With the ever-increasing grid-connected operation of new energy generating units, it has become normal for coal-fired power plant boilers to participate in deep peak regulation and maintain low-load operation for a long time, which puts forward higher requirements for the stable combustion capability of boilers. The double-inlet and double-outlet coal mill has excellent ignition and combustion stability because it can maintain high coal fineness, suitable primary air-to-powder ratio, high primary air-...

AI Technical Summary

Problems solved by technology

However, in the initial stage of starting and stopping of the coal mill, due to the large storage space of the coal mill, it cannot immediately output power when starting and stop output immediately when it is stopped, resulting in inaccurate coal measurement during this period. Disturb the combustion control in the furnace, reducing the economy and safety of unit operation

[0004] At present, there is no relevant information to provide an effective solution for the coal quantity measurement during the start-up and stop process of the double-inlet and double-outlet coal mill

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