[1]孟春霖,颜莹莹,梁远,等.关于污泥火电厂协同焚烧的控制性指标的思考和建议[J].中国给水排水,2021,37(14):46-55.
MENG Chun-lin,YAN Ying-ying,LIANG Yuan,et al.Thinking and Suggestion on the Control Index of Sludge Co-incineration in Thermal Power Plant[J].China Water & Wastewater,2021,37(14):46-55.
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MENG Chun-lin,YAN Ying-ying,LIANG Yuan,et al.Thinking and Suggestion on the Control Index of Sludge Co-incineration in Thermal Power Plant[J].China Water & Wastewater,2021,37(14):46-55.
关于污泥火电厂协同焚烧的控制性指标的思考和建议
中国给水排水[ISSN:1000-4062/CN:12-1073/TU]
卷:
第37卷
期数:
2021年第14期
页码:
46-55
栏目:
出版日期:
2021-07-17
- Title:
- Thinking and Suggestion on the Control Index of Sludge Co-incineration in Thermal Power Plant
- Keywords:
- thermal power plant; sludge co-incineration in thermal power plant; sludge quality; sludge disposal
- 摘要:
- 近年来利用火电厂协同处置污泥的项目逐渐增多，污泥火电厂协同焚烧已经成为国内污泥处置的重要方式。但与之矛盾的是，污泥电厂协同焚烧却仍未有行业规范出台。为了促进行业的可持续和规范化发展，需对污泥火电厂掺烧的泥质要求、掺烧比，以及可能产生的二次污染等关键的控制性指标进行系统性的思考。关于入炉污泥泥质的污染物指标，建议可依据《城镇污水处理厂污泥泥质》（GB 24188—2009）的项目和限值进行要求。由于汞的毒性和挥发性，对总汞的限值要求适当严格，应满足总汞<15 mg/kg干污泥的要求。关于污泥含水率和掺烧比，建议在煤粉炉掺烧的污泥基本以干化污泥为主，当污泥含水率≤40%且掺烧比≤5%时，对锅炉运行以及污染物排放影响不大。在流化床中可以掺烧脱水污泥，当污泥含水率≤80%且掺烧比≤10%时，对锅炉运行以及污染物排放影响不大。关于烟气排放标准，需综合考虑污泥火电厂掺烧可能产生大气污染物排放风险，并结合《火电厂大气污染物排放标准》（GB 13223—2011）、《生活垃圾焚烧污染控制标准》（GB 18485—2014）、欧盟垃圾焚烧标准2000/76/EC、《恶臭污染物排放标准》（GB 14554—2018）的指标要求。此外，污泥火电厂掺烧后不应影响火电厂炉渣和粉煤灰的原处置或综合利用路径。原则上，污泥火电厂掺烧后产生的粉煤灰，应按《危险废物鉴别标准 通则》（GB 5085.7—2019）进行鉴定，属于危险废物的，按危险废物处置；不属于危险废物的，可按原路径处理和综合利用。
- Abstract:
- In recent years, projects using thermal power plants for incineration of sludge have gradually increased, and sludge co-incineration in thermal power plants has already become an important domestic sludge disposal method. However, sludge co-incineration in thermal power plants has not yet been regulated by corresponding specifications. To promote the sustainable and standardized development of the industry, it is necessary to systematically consider the key control indicators such as sludge quality requirements, blending ratio, and possible secondary pollution of sludge co-incineration in thermal power plants. Regarding the pollutant index of the sludge entering the boiler, it is recommended that the requirements can be referred to the standards of Quality of Sludge from Municipal Wastewater Treatment Plant (GB 24188-2009). The limit for total mercury should be strict and meet the requirement of total mercury（<15 mg/kg dry solid）due to its toxicity and volatility. Regarding the water content and blending ratio for sludge, it is suggested that the sludge co-incineration in the pulverized coal boiler should be dry sludge. When the sludge water content is ≤40% and the blending ratio is ≤5%, it has few effects on the operation of the boiler and the discharge of pollutants. Dewatered sludge can be co-incineration in the fluidized bed boiler. When the sludge water content is ≤80% and the blending ratio is ≤10%, it has few effects on the operation of the boiler and the discharge of pollutants. Regarding gas emission standards, it is necessary to comprehensively evaluate the risk of air pollutant emission from the sludge co-incineration in thermal power plants, and to synthetically consider the requirements of Emission Standard of Air Pollutants for Thermal Power Plants (GB 13223-2011), Standard for Pollution Control on the Municipal Solid Waste Incineration (GB 18485-2014), EU 2000/76/EC, and Emission Standards for Odor Pollutants(GB 14554-2018). In addition, the sludge coincineration in the thermal power plant should not affect the original disposal or comprehensive utilization path of the slag and fly ash in thermal power plant. In principle, the fly ash produced should be identified in accordance with the Identification Standards for Hazardous Waste—General Rules（GB 5085.7-2019）. If it is not hazardous, it can be treated and comprehensively used in the original way. Otherwise, it should be disposed according to the hazardous waste treatment and disposal regulations.
更新日期/Last Update:
2021-07-19