锅炉入炉煤质检测数据正态性分析
第47卷 第7期 热 力 发 电 V ol.47 No.7
收稿日期：2017-10-25
第一作者简介：刘福国(1969-)，男，高级工程师，主要研究方向为电厂锅炉运行检测与优化技术，lephico@https://www.wendangku.net/doc/1218472621.html, 。
锅炉入炉煤质检测数据正态性分析
刘福国1，王守恩1，崔福兴1，牛卓伦2
（1.国网山东省电力公司电力科学研究院，山东 济南 250002；
2.西安交通大学能源与动力工程学院，陕西 西安 710049）
[摘 要]锅炉掺烧不同品种的煤使炉前煤质检测数据不能准确表征原始掺配煤种的变化，并引起炉
前采样样品收到基低位发热量波动增大，给运行调整和常规煤耗检测带来困难。本文对
6个电厂17台锅炉入炉煤发热量的日常检测数据进行了正态性检验，发现在掺配煤的种类
和数量稳定，且掺配方案不变的情况下，炉前煤质混合样品发热量数据呈正态分布，发热
量数据从正态分布向非正态分布的转变通常意味着掺配方案或原始煤种的变化，据此可实
现对原始掺配煤种或掺配方案变化的识别。此外，炉前混煤样品发热量均值和标准差是机
组供电煤耗不确定度分析的基础，据此可定量分析发热量分散性对供电煤耗的影响。
[关 键 词]锅炉；掺烧；供电煤耗；不确定度；发热量；标准差；正态性检验
[中图分类号]TK16 [文献标识码]A [DOI 编号]10.19666/j.rlfd.201710150
[引用本文格式]刘福国, 王守恩, 崔福兴, 等. 锅炉入炉煤质检测数据正态性分析[J]. 热力发电, 2018, 47(7): 34-39. LIU Fuguo, WANG Shouen, CUI Fuxing, et al. Normal analysis of coal quality test data for boilers[J]. Thermal Power Generation, 2018, 47(7): 34-39.
Normal analysis of coal quality test data for boilers
LIU Fuguo 1, WANG Shouen 1, CUI Fuxing 1, NIU Zhuolun 2
(1. State Grid Shandong Electric Power Research Institute, Jinan 250002, China;
2. School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China)
Abstract: Blending with different types of coal makes the coal quality test data inaccurately characterize the changes of the original blended coal type. It causes the increase in fluctuations of net calorific value as received basis, which makes it difficult for the operation adjustment and routine coal consumption rate test. In this study, the normal test of the daily test data of the coal calorific value of 17 boilers in 6 power plants is carried out. The results show that, the calorific value of the blended coal shows a normal distribution under the condition that the type and quantity of blended coal are stable and the blending scheme remains unchange. The change of the calorific value data from normal distribution to non-normal distribution usually implies the change of the blending scheme or the original coal type, whereby the change of original blended coal type or blending scheme can be distinguished. In addition, the mean value and standard deviation of the calorific value of the blended coal are the basis of the uncertainty analysis of the coal consumption rate of the unit. In the light of this, the influence of the calorific value dispersion on the coal consumption rate of power supply can be quantitatively analyzed.
Key words: boiler, blending combustion, coal consumption rate of power supply, uncertainty, calorific value, standard deviation, normal test
为降低发电成本，优化煤炭资源利用，电厂发
电用煤通常由2种或2种以上的煤按一定比例掺配
而成[1-2]，炉前煤质成分和发热量的检测数据不能准
确表征原始掺配煤种的变化，而原始煤种常常对燃
尽度有较大影响[3-4]；原始煤种变化还影响锅炉低负荷稳燃能力[5-6]，实际运行中，因掺配煤种改变或掺配不当引起锅炉灭火事故也时有发生[7-8]：因此，对于多煤种掺烧锅炉，原始煤种及掺配方案的监测和识别，对锅炉异常运行分析和优化有较为重要的意义。但有时因入厂煤本身就是混煤，原始煤种变化万方数据