燃煤机组污泥掺烧粉尘特性表征及气动振打电除尘改造试验研究

赵海宝; 唐志昌; 王少权; 谢洁; 徐建立

doi:10.13205/j.hjgc.202606019

燃煤机组污泥掺烧粉尘特性表征及气动振打电除尘改造试验研究

doi: 10.13205/j.hjgc.202606019

1. 浙江菲达环保科技股份有限公司, 浙江诸暨 311800;
2. 浙江省燃煤烟气净化装备研究重点实验室, 浙江诸暨 311800;
3. 浙江浙能嘉华发电有限公司, 浙江嘉兴 314000

基金项目:

国家重点研发计划“烟气常规/非常规污染物高效耦合脱除关键技术”（2022YFC3701501）

详细信息

作者简介:
赵海宝(1987-),男,高级工程师,主要研究方向为电除尘及燃煤电站污染物控制。zhaohaibaozj@163.com

通讯作者:
赵海宝(1987-),男,高级工程师,主要研究方向为电除尘及燃煤电站污染物控制。zhaohaibaozj@163.com

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出版历程
- 收稿日期: 2025-06-16
- 录用日期: 2025-07-10
- 修回日期: 2025-06-29
- 网络出版日期: 2026-07-06

Characterization of dust characteristics from sludge co-combustion in coal-fired units and experimental study on retrofit of pneumatically rapped ESP

1. Zhejiang Feida Environmental Science & Technology Co., Ltd., Zhuji 311800, China;
2. Key Laboratory of Coal-fired Flue Gas Purification Equipment Research of Zhejiang Province, Zhuji 311800, China;
3. Zhejiang Zheneng Jiahua Power Generation Co., Ltd., Jiaxing 314000, China

摘要

摘要: 燃煤机组污泥掺烧的烟气粉尘黏性大，导致炉后环保设备积灰问题严重。在此背景下分析了电除尘器积灰原理，对积灰粉尘层特性进行表征，发现燃煤机组污泥掺烧后导致烟气含水量增加，颗粒形态改变和粉尘黏性增加等问题。为此，开发出阳极气动振打电除尘技术以提高电除尘阳极板清灰性能。对浙江嘉华电厂某1000 MW机组电除尘器进行了气动振打电除尘器改造，并进行了工程应用试验，2025年2月，在掺烧污泥工况下对电除尘器性能进行对比测试。试验结果显示：在比集尘面积为118 m²·s/m³和负荷为987 MW运行的情况下，电除尘器出口粉尘浓度从改造前的25.32 mg/m³降低到改造后的7.95 mg/m³。分析得出：污泥掺烧后电除尘器第一电场阳极板积灰严重，产生反电晕现象，高压电源闪络，二次电压和二次电流运行参数低。增设阳极气动振打，消除了振打加速度小的区域，阳极板得到有效清灰，高压电源的二次电压和二次电流得到有效抬升，电除尘提效显著。气动振打电除尘技术可为燃煤机组生物质（污泥）掺烧和低负荷运行的电除尘改造提供参考。
- 燃煤机组 /
- 生物质掺烧 /
- 污泥掺烧 /
- 节能减排 /
- 气动振打 /
- 电除尘改造
Abstract: The flue gas and dust generated by sludge co-combustion in coal-fired power plants exhibit high viscosity， leading to severe dust deposition on downstream environmental protection equipment. In this context， the dust deposition mechanism inside electrostatic precipitator （ESP） was analyzed， and the characteristics of dust layers were characterized. The results indicated that sludge co-combustion in coal-fired units increased flue gas moisture content， changed particle morphology， and elevated dust viscosity. To address this issue， an anode pneumatically rapped ESP technology was developed to improve the dust cleaning efficiency of the anode plates. This technology was applied to the retrofit of a 1000 MW coal-fired unit at Zhejiang Jiahua Power Plant， and corresponding engineering verification tests were carried out. ESP performance tests under sludge co-combustion conditions were completed in February 2025. The test results showed that， at a specific dust collection area of 118 m²·s/m³ and a unit load of 987 MW， the dust concentration at the outlet of the ESP decreased from 25.32 mg/m³ before the retrofit to 7.95 mg/m³ after the retrofit. Analysis revealed that sludge co-combustion caused excessive dust deposition on the anode plates of the first electric field， which induced back corona， high-voltage power supply flashover， and low operating parameters of secondary voltage and current. After the retrofit with the pneumatically rapped ESP， regions with low rapping acceleration on the plates were eliminated， achieving effective dust cleaning of anode plates. Meanwhile， the secondary voltage and current of the high-voltage power supply were significantly improved， and the overall dust collection efficiency of the ESP was remarkably enhanced. The proposed pneumatically rapped ESP technology can provide a reference for ESP retrofitting of coal-fired units under biomass （sludge） co-combustion and low-load operating conditions.
- coal-fired units /
- biomass co-combustion /
- sludge co-combustion /
- energy saving and emissions reduction /
- pneumatic rapping /
- ESP retrofitting

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