燃煤机组掺烧烟气干化污泥能耗特性试验研究

李源; 马仑; 周海远; 马帅; 陈科峰; 王留锋; 陈青

doi:10.19666/j.rlfd.202503040

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燃煤机组掺烧烟气干化污泥能耗特性试验研究

更新时间：2026-03-18

- 燃煤机组掺烧烟气干化污泥能耗特性试验研究
- Thermal Power Generation Vol. 55, Issue 1, Pages: 169-176(2026)
- 作者机构：
  
  1. 润电能源科学技术有限公司
  2. 武汉理工大学安全科学与应急管理学院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202503040
  CLC： X703;TM62
- Published：2026
- 稿件说明：
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[1]李源,马仑,周海远,等.燃煤机组掺烧烟气干化污泥能耗特性试验研究[J].热力发电,2026,55(01):169-176.
[1]李源,马仑,周海远,等.燃煤机组掺烧烟气干化污泥能耗特性试验研究[J].热力发电,2026,55(01):169-176. DOI： 10.19666/j.rlfd.202503040.

DOI：10.19666/j.rlfd.202503040.

摘要

污泥掺烧是破解污泥围城难题的重要方法之一。针对某350 MW超临界燃煤机组，开展烟气干化污泥掺烧现场试验，分析污泥掺烧量、机组负荷对系统运行和能耗的影响，利用抽取的锅炉尾部烟气干化湿污泥，干化后污泥被烟气携带入炉协同焚烧。结果表明：湿污泥处理量与干化所需的烟气温度、流量呈正相关，干化11 t/h湿污泥需要消耗597℃锅炉烟气71 t/h；随着污泥掺烧比例的增加，锅炉效率有所下降，机组厂用电率则有所上升；污泥掺烧时，锅炉效率下降主要由排烟热损失增加导致，机械不完全燃烧热损失和灰渣物理显热损失增加为次要因素；机组厂用电率上升的主要原因是污泥干化系统电耗偏大，并且机组厂用电率上升量中污泥掺烧系统分摊了大部分；锅炉效率下降和机组厂用电率上升共同导致机组供电燃煤耗率上升，其中机组厂用电率上升的影响更加明显；在机组负荷262 MW和污泥掺混质量比8.76%（污泥含水率83%）工况下，锅炉效率下降0.260%，机组厂用电率增加0.466%，机组供电燃煤耗率增加2.38 g/(kW·h)。该结论可为燃煤机组耦合烟气干化污泥发电系统能耗评估与优化提供参考。

Abstract

Co-firing sludge is one of the important approaches to address the challenges of urban sludge accumulation. The field test of co-firing sludge dried by flue gas was conducted in a 350 MW supercritical coalfired power unit to investigate the effects of blending amount and unit load on system operation and energy consumption. Wet sludge was dried using extracted boiler tail flue gas

with the dried sludge subsequently carried into the furnace for co-combustion. The results show that a positive correlation exists between the wet sludge amount and the temperature/flow rate of drying flue gas. Drying 11 t/h wet sludge required 71 t/h flue gas at 597 ℃. As the sludge blending ratio rose

the boiler thermal efficiency decreased

while the auxiliary power consumption ratio increased. The rise in sensible heat loss in exhaust gas mainly led to the decline in boiler thermal efficiency

and the rises in both unburned carbon heat loss in residue and sensible heat loss in residue were secondary factors. The rise in auxiliary power consumption ratio was primarily attributed to the high power consumption of the sludge drying system

with sludge co-combustion system dominating the rise in auxiliary power consumption ratio. The rise in net coal consumption rate was caused by the decline in boiler thermal efficiency and the rise in auxiliary power consumption ratio

and the rise in auxiliary power consumption ratio contributed more significantly. At 262 MW and with a sludge blending mass ratio of 8.76%(sludge moisture fraction: 83%)

the boiler thermal efficiency decreased by 0.260%

the auxiliary power consumption ratio increased by 0.466%

and the net coal consumption rate increased by 2.38 g/(kW·h). The study provides a reference foundation for the energy consumption evaluation and optimization of co-firing sludge dried by flue gas in a coal-fired power unit.

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