Study on influence of biomass co-firing on a 660 MW pulverized coal-fired boiler

TAN Houzhang; YANG Fuxin; RUAN Renhui; WANG Xuebin; YANG Zuwang; ZHENG Haiguo

doi:10.19666/j.rlfd.202108161

English

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Study on influence of biomass co-firing on a 660 MW pulverized coal-fired boiler

Thermal Power Generation Vol. 51, Issue 4, Pages: 23-29(2022)

更新时间：2025-09-28

- Study on influence of biomass co-firing on a 660 MW pulverized coal-fired boiler
- 作者机构：
  
  1. 西安交通大学热流科学与工程教育部重点实验室
  2. 西安格瑞电力科技有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202108161
  CLC： TM621.2
- Published：2022
- 稿件说明：
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TAN Houzhang, YANG Fuxin, RUAN Renhui, et al. Study on influence of biomass co-firing on a 660 MW pulverized coal-fired boiler[J]. Thermal Power Generation, 2022, 51(4): 23-29.
DOI：

TAN Houzhang, YANG Fuxin, RUAN Renhui, et al. Study on influence of biomass co-firing on a 660 MW pulverized coal-fired boiler[J]. Thermal Power Generation, 2022, 51(4): 23-29. DOI： 10.19666/j.rlfd.202108161.

摘要

生物质能源是零碳燃料，在我国能源转型以及“碳中和”战略中处于极其重要的地位，基于某660 MW机组直流摆动式四角切圆超临界燃煤锅炉，开展秸秆生物质掺烧试验，研究掺烧量对燃烧特性、飞灰可燃物、锅炉效率以及水泥特性的影响。结果表明：在不新增加设备情况下，利用原有F层制粉系统可将生物质压型块粉碎、磨制后送入顶层燃烧器区域；在600 MW和500 MW负荷，掺烧生物质30、40、50 t/h（掺烧质量比为11.8%～19.7%），炉内保持正常着火和稳定燃烧，未见着火提前现象，炉膛出口烟气温度变化未超过30℃，锅炉效率始终保持在93.9%～94.1%，且掺烧生物质对NO_x、SO_2影响甚微；掺烧生物质后的粉煤灰28天强度活性指数在75%以上，且安定性、需水量、比表面积、安定性、抗折强度符合建筑用材标准。

Abstract

As a zero-carbon fuel

biomass energy plays an important role in China's energy transition and “carbon neutrality” strategy. Experimental investigation was conducted on straw co-firing based on a supercritical 660 MW unit once through swing tangentially-fired boiler

and the effects of biomass mixing ratio on combustion characteristics

unburned carbon in fly ash

boiler efficiency and cement characteristics were studied. The results showed that

without adding new device

the biomass could be grinded well with the original F-layer pulverizing system and then sent to the burners at the top layer. At 600 MW and 500 MW

when the biomass mixing mass ratio was 11.8%～19.7%(quantity of 30

50 t/h)

normal ignition and stable combustion were observed in the furnace

and no advance ignition was detected. The temperature change of flue gas at outlet of the furnace did not exceed 30 ℃. The boiler efficiency maintained at 93.9%～94.1%

and the influence of biomass co-firing on NO_x and SO_2 can be ignored. After biomass co-firing

the 28-day strength activity index of the fly ash was higher than 75%

and other indicators like stability

water demand

specific surface area

stability and bending strength met the standards of building materials.

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