配煤掺烧电站的热经济性分析

doi:10.11930/j.issn.1004-9649.201805172

中国电力 ›› 2018, Vol. 51 ›› Issue (9): 8-14.DOI: 10.11930/j.issn.1004-9649.201805172

配煤掺烧电站的热经济性分析

闫小坤¹, 焦开明², 许诚³

1. 河北大唐国际张家口热电有限责任公司, 河北张家口 075000;
2. 内蒙古大唐国际托克托发电有限责任公司, 内蒙古托克托 010206;
3. 华北电力大学国家火力发电工程技术研究中心, 北京 102206

收稿日期:2018-05-25 出版日期:2018-09-05 发布日期:2018-09-20
作者简介:闫小坤(1983-),男,工程师,从事燃煤电厂集控运行、配煤掺烧问题研究,E-mail:yxk983117@sina.com;焦开明(1979-),男,高级工程师,从事燃煤电厂燃烧优化调整、配煤掺烧问题研究,E-mail:clever_ni@163.com;许诚(1987-),男,博士,讲师,从事燃煤电站系统节能优化研究,E-mail:xucheng@ncepu.edu.cn
基金资助:
国家重点研发计划项目（2017YFB0603300）；国家自然科学基金资助项目（51706065）。

Thermo-economic Analysis of a Blending Coal-fired Power Plant

YAN Xiaokun¹, JIAO Kaiming², XU Cheng³

1. Datang International Zhangjiakou Thermal and Power Generation Co., Ltd., Zhangjiakou 075000, China;
2. Inner Mongolia Datang International Togtoh Power Generation Co., Ltd., Tuoketuo 010206, China;
3. National Thermal Power Engineering Technology Research Center, North China Electric Power University, Beijing 102206, China

Received:2018-05-25 Online:2018-09-05 Published:2018-09-20
Supported by:
This work is supported by the National Key R&D Program of China (No.2017YFB0603300) and Natural Science Foundation of China (No.51706065).

摘要/Abstract

摘要： 为提高案例机组热经济性，以单位燃煤成本为目标函数，入炉煤质特性为约束条件，建立了配煤后电站整体热力性能的变化模型，求得最佳配煤比；对配煤后煤质变化对锅炉效率及主要辅机电耗的影响进行分析计算；最终获得了配煤掺烧的供电燃料成本。结果表明：案例机组配煤掺烧各单煤的最佳配比为0：2：5：3，单位质量配煤价格较设计煤种低43元/t；燃用配煤后，锅炉效率下降了0.5个百分点，辅机设备电耗增加了1 123.8 kW，厂用电率增加了0.2个百分点，最终机组供电标煤煤耗率增加了2.4 g/（kW·h）；综合来看，配煤掺烧电站单位供电燃料成本降低了约3%，每年可节约燃料成本约1 800万元。提出的建模方法可为配煤掺烧电站热经济性综合评估提供参考。

关键词: 掺烧, 锅炉效率, 厂用电率, 煤耗率, 热经济性

Abstract: To improve the thermo-economic performance of the blending coal-fired power plants, this study adopted the unit coal cost as the objective and the coal characteristics as the constraint conditions, developed the models for evaluating the variations of the unit performance, and finally achieved the optimal blend coal ratio. Then the influence of the blending ratio on the boiler efficiency and the main auxiliary equipment power consumption were also analysed. Finally, the cost of using the blending coal was obtained. The results showed that, when the power plant operated with the optimal blending ratio of 0:2:5:3, the price of the blending coal can be reduced by 43 CNY/ton compared to the designed coal. The electricity consumption of the auxiliary equipment is increased by 1123.8 kW, which led to a 0.2% increase in the auxiliary power consumption rate. Also, the boiler efficiency is decreased by 0.5%. These two aspects increased the standard coal consumption rate by 2.4 g/(kW·h). Overall, the fuel cost of unit electricity of the blending coal decreased by 3%, which brought coal cost savings of 18.0 million CNY. This study will provide a reference for evaluation of the integrated performance of the power plants using the blend coals.

Key words: blending combustion, boiler efficiency, auxiliary power rate, coal consumption rate, thermal-economic analysis

中图分类号:

TK16

闫小坤, 焦开明, 许诚. 配煤掺烧电站的热经济性分析[J]. 中国电力, 2018, 51(9): 8-14.

YAN Xiaokun, JIAO Kaiming, XU Cheng. Thermo-economic Analysis of a Blending Coal-fired Power Plant[J]. Electric Power, 2018, 51(9): 8-14.

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配煤掺烧电站的热经济性分析

Thermo-economic Analysis of a Blending Coal-fired Power Plant

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配煤掺烧电站的热经济性分析

Thermo-economic Analysis of a Blending Coal-fired Power Plant

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