Thermal energy cascade utilization technology of coordinated waste heat and regenerative systems

WEI Shaoqing; HAO Jiangping; HU Hemin; JIANG ping; GAO Shiqiu

doi:10.19666/j.rlfd.201709106

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Thermal energy cascade utilization technology of coordinated waste heat and regenerative systems

更新时间：2025-09-28

- Thermal energy cascade utilization technology of coordinated waste heat and regenerative systems
- Thermal Power Generation Vol. 47, Issue 6, Pages: 111-115(2018)
- 作者机构：
  
  1. 晋能电力集团有限公司
  2. 中国科学院过程工程研究所
  3. 中国科学院工程热物理研究所
  4. 山西赵庄鑫光发电有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201709106
  CLC： TM621
- Published Online：06 June 2018，
  
  Published：2018
- 稿件说明：
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WEI Shaoqing, HAO Jiangping, HU Hemin, et al. Thermal energy cascade utilization technology of coordinated waste heat and regenerative systems[J]. Thermal power generation, 2018, 47(6): 111-115.
DOI：

WEI Shaoqing, HAO Jiangping, HU Hemin, et al. Thermal energy cascade utilization technology of coordinated waste heat and regenerative systems[J]. Thermal power generation, 2018, 47(6): 111-115. DOI： 10.19666/j.rlfd.201709106.

摘要

针对目前常用余热利用技术的不足

开发了协调余热与回热系统的新型热能梯级利用系统。该系统将锅炉和汽轮机的余热利用与回热循环有机结合起来

可智能分配热流向

具有更好的参数调控性能和工况适应性

不仅动态优化了热能的梯级利用

也改善了空气预热器的性能。以某660 MW空冷机组为例

设置传统低温省煤器回收烟气余热可使供电标准煤耗率在额定功率工况和热耗率验收工况分别降低1.70、1.08 g/(k W·h)

采用协调余热与回热系统改造后分别降低3.19、3.74 g/(k W·h)

平均多节能约150%

热经济性显著提高。

Abstract

In view of the deficiencies of currently used waste heat utilization technologies

a new thermal energy cascade utilization system for coordinated waste heat and regenerative systems is developed. The system organically combines the regenerative cycle and the waste heat utilization from the boiler and turbine

which has intelligent allocation ability of heat flux direction

better parameter regulation performance and working condition adaptability. This system can optimize dynamically the thermal energy cascade utilization and improve the air preheater performance. Taking an air-cooled 660 MW unit as an example

adopting the traditional low-temperature economizer to recover the waste heat from flue gas can reduce the standard coal consumption rate of the power supply by 1.70 g/(k W·h) at the rated power condition and heat consumption rate by 1.08 g/(k W·h) at the acceptance conditions. After reconstruction of the coordinated waste heat and regenerative systems

the standard coal consumption reductions and heat consumption rate reduced by 3.19 g/(k W·h) and 3.74 g/(k W·h)

respectively. It save 150% energy more than that by the traditional scheme. The thermal economy can be greatly improved.

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