正平衡供电煤耗升高原因分析及煤耗修正计算

摘要/Abstract

摘要：

对某燃煤电厂正平衡供电煤耗统计值同比异常升高的问题进行原因分析和修正计算。研究主要通过查验日耗煤量、日发电量、机组指标统计表等相关历史数据，基于机组能耗小指标数据对供电煤耗影响进行耗差分析。同时对机组月均供电煤耗进行采样、化验、计量及统计过程进行修正，得到了供电煤耗修正值的区间。对相近工况的2台机组月均能耗小指标同期数据进行耗差分析得出，炉侧影响供电煤耗约6.26g/(kW·h)，机侧影响供电煤耗约1.83g/(kW·h)；采样、化验、计量及统计过程影响供电煤耗约4.10~4.80g/(kW·h)。正平衡月均供电煤耗同比异常升高的原因为炉侧及机侧小指标耗差、入炉煤热值计量及统计过程中的误差。对入炉煤采制化设备存在的问题提出了相关建议，确保入炉煤采制化的精度。

关键词:

">">供电煤耗, 煤耗修正, 入炉煤采制化, 小指标数据, 正平衡

Abstract:

In view of the abnormal increase of the coal consumption for electricity supply in a coalfired 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 6.26g/(kW·h) and 1.83g/(kW·h) roughly, and influence on coal consumption brought by sampling, testing, measurement and statistics is 4.10~4.80g/(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.

Key words:

coal consumption for power supply, correction calculation of the coal consumption；sampling, sample preparing and testing of the coal as fire；small index data；positive balance

苏攀，沈阳，于鹏峰，韩静. 正平衡供电煤耗升高原因分析及煤耗修正计算[J]. 华电技术, 2019, 41(6): 38-41.

SU Pan，SHEN Yang，YU Pengfeng，HAN Jing.

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

[J]. Huadian Technology, 2019, 41(6): 38-41.

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