Huadian Technology ›› 2019, Vol. 41 ›› Issue (6): 38-41.

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Cause analysis and correction calculation on the positive balance coal consumption for electricity supply

  

  1. Huadian Electric Power Research Institute Company Limited,  Hangzhou 310030,China
  • Published:2019-06-25

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Abstract:

In view of the abnormal increase of the coal consumption for electricity supply in a coalfired power plant, the causes and modification calculation for coal consumption are analyzed. Based on the historical data such as daily coal consumption, daily electric energy production, statistical tables of the unit and small index data of energy consumption of the unit, influence on power supply coal consumption is analyzed. At the same time, sampling, assay, measurement and statistical process correction are made for the monthly average coal consumption for power supply, and the interval range of the coal consumption correction is obtained. Comparing the monthly average energy consumption small index of 2 units with similiar working condition for the same period, influence on coal consumption brought by furnace and machine side are 6.26g/(kW·h) and 1.83g/(kW·h) roughly, and influence on coal consumption brought by sampling, testing, measurement and statistics is 4.10~4.80g/(kW·h). The reason for the abnormal increase of positive balance monthly average coal consumption for power supply is due to the small index data on machine side, errors in the calorific value measurement and statistical process of coal as fire. Related suggestions for the existing problems in the coal as fire are put forward, which ensures the accuracy of the coal sampling，sample preparing and testing.

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