为积极响应双碳目标，推动可再生能源-燃煤互补发电技术的发展，提出了一种燃煤发电与垃圾发电耦合供热系统。通过抽引器利用燃煤机组部分供热抽汽抽引垃圾发电机组的全部排汽，混合后对热网水进行一次加热；随后通过尖峰加热器，再次利用燃煤机组供热抽汽对热网水进行二次加热，使其达到规定热网供水温度。通过系统集成，可有效减少燃煤机组供热抽汽和垃圾发电机组的冷端损失，从而提高系统整体效率。选择某660 MW燃煤机组与某垃圾处理量20.8 t/h的垃圾发电机组为研究对象，通过EBSILON软件进行模拟计算，进行了详细的热力学分析和经济性分析。结果表明，燃煤机组与垃圾发电机组电功率分别为495.00 MW（75% THA）和9.52.00 MW(100% THA)时，耦合系统垃圾发电机组的排汽损失降低，供热效率提高0.16%，发电效率提高0.52%，系统煤耗量降低1.65 t/h（以标煤计），节能效果显著。热网尖峰加热器（火用）损失减少6.06 MW，垃圾发电机组（火用）损失减少2.04 MW，耦合供热系统效率提高主要是由于热网加热器（火用）损失降低。供热改造后新增设备投资495.70万元，年运行维护费用达19.83万元，同时系统节能收益542.92万元，最终年化新增净收益可达423.95万元，经济收益较好。

To actively respond to the dual carbon target and promote the development of renewable energy and coal complementary power generation technology, a coupled heating system of coal power generation and garbage power generation was proposed. Part of the heating exhaust steam of the coal-fired power unit is used to draw all the exhaust steam of the waste power unit through the extractor. After mixing, the water in the heat network is heated once. Through the spike heater, the heating extraction steam of the coal-fired unit is used to heat the heat network water again, so that it reaches the prescribed water supply temperature of the heat network. Through the system integration, the cold end loss of the heating extraction steam of the coal-fired unit and the waste generator unit can be effectively reduced, thus improving the overall efficiency of the system. A 660 MW coal-fired unit and a waste generating unit with a waste disposal capacity of 20.8 t/h were selected as the research objects, the simulation calculation was carried out through the EBSILON software and the detailed thermodynamic and economic analysis were carried out. The results show that when the electric power of the coal-fired unit is 495.00 MW (75% THA) and the garbage generator is 9.52 MW(100% THA), the exhaust steam loss of the garbage generator in the coupled system is reduced, the heating efficiency is increased by 0.16%, the power generation efficiency is increased by 0.52%, and the system coal consumption is reduced by 1.65 t/h (measured by standard coal). The energy-saving effect is significant. The exergy loss of the peak heater in the thermal grid is reduced by 6.06 MW and that of the waste generator is reduced by 2.04 MW. The reason for the efficiency improvement of the coupled heating system is the reduction of exergy loss of the heater in the thermal grid. After the heating renovation, the new equipment investment is 4.957 million yuan, the annual operation and maintenance cost is 198 300 yuan, and the system energy saving benefit is 5.429 2 million yuan. The final annualized new net income is 4.239 5 million yuan, which has a good economic benefit.

0 引言

1 系统介绍

   1.1 案例机组

   1.2 耦合供热系统

2 分析方法

   2.1 能量分析

   2.2 （火用）分析

   2.3 经济性分析

3 系统模拟

   3.1 系统建模

   3.2 模拟分析

4 结果分析

   4.1 能量分析

   4.2 （火用）分析

   4.3 经济性分析

5 结论