Taizhou Power Plant of Zhejiang Zheneng Power Co., Ltd.
Zhejiang EnergyGroup R & D
Institute of Energy Engineering,China Jiliang University

针对我国含油污泥产生量大、成分复杂、处置困难等问题,提出了在大型燃煤锅炉中掺烧含油污泥的技术路线。首先,对掺烧含油污泥的技术方案进行数值模拟,发现掺烧后锅炉内温度场分布变化不大,主燃区温度轻微升高;当部分燃料由煤粉替换为含油污泥时,由于后者着火快、燃尽高,可以提高主燃区燃烧温度,进而促进NOx被还原,因此减少了NOx排放;掺烧含油污泥后,飞灰含碳量降低,锅炉效率提高。随后,该技术在330MW机组上进行了工程应用,实测结果表明,在120MW负荷下,含油污泥掺烧后NOx排放值由425mg/Nm3降低至376mg/Nm3,锅炉效率由原来的91.90%提高到92.13%,因此,该掺烧技术具有较好经济性和环保性,且具有较好的推广应用前景。

In response to the issues of large production volume, complex composition, and difficultiesin the disposal of oily sludge in China, this paper presents a novel technical approach that involvesblending and burning oily sludge in large coal-fired boilers. First, a numerical simulation was conductedto evaluate the co-burning scheme of oily sludge. The results showed that blending did not significantlyalter the temperature field distribution within the boiler, except for a slight increase observed in themain combustion zone. When a portion of the fuel was replaced with oily sludge instead of pulverizedcoal, the combustion temperature in the main zone rose due to the fast ignition and high combustioncompleteness of oily sludge, resulting in a reduction of nitrogen oxides (NO) emissions. Additionally,burning oily sludge led to a decrease in the carbon content of the fly ash, thereby improving boilerEnergy Environmental Protectionefficiency. Secondly, this technical approach was implemented in practice on a 330 MW boiler. Themeasurement results demonstrated that under a 120 MW load, the blending and burning of sludgereduced the NO emission value from 425 mg/Nm to 376 mg/Nm and increased boiler efficiency from91.90% to 92.13%. Therefore, the blending approach offers significant economic and environmentalbenefits and promising prospects for widespread applications.

浙江省火力发电高效节能与污染物控制技术研究重点实验室开放课题(JSYJY-KJFW-2022-015)

顾永平,吴剑波,张凡志,等.大型燃煤锅炉掺烧含油污泥的数值模拟及工程应用[J].能源环境保护,2024,38(6):132−138.

GU Yongping, WU Jianbo, ZHANG Fanzhi, et al. Numerical simulation of oily sludge blending in large coal-fired boilers and its engineering application[J]. Energy Environmental Protection, 2024, 38(6): 132−138.