MENGXin,CHENWei,CHENBai-xiao.Practice of Xiaoshan 4 000 t/d Centralized Sludge Incineration Project[J].China Water & Wastewater,2022,38(8):127-132.
蕭山4 000 t/d污泥集中焚燒處理項目實踐
- Title:
- Practice of Xiaoshan 4 000 t/d Centralized Sludge Incineration Project
- 關(guān)鍵詞:
- 污泥焚燒; 深度脫水; 循環(huán)流化床鍋爐
摘要:- 蕭山4 000 t/d污泥集中焚燒處理項目針對污水廠污泥處理難題，通過深度脫水與焚燒發(fā)電相結(jié)合的方式處理污泥。深度脫水工藝采用化學調(diào)理和機械壓濾的脫水方式，不同含水率的污泥通過一次壓濾脫水就能達到焚燒要求。脫水干化后的污泥含水率降至45%~50%，與質(zhì)量比為10%的煤混合后，送入循環(huán)流化床鍋爐進行焚燒。與普通燃煤電廠摻燒污泥相比，本項目泥煤配比有重大突破，污泥焚燒量有很大的提高，入爐焚燒處理污泥達1 800 t/d（含水率45%）。污泥燃燒的余熱用于發(fā)電，實現(xiàn)了污泥能量轉(zhuǎn)化和凈能量輸出。煙氣處理系統(tǒng)配置石灰石-石膏濕法脫硫、靜電除塵、布袋除塵、低氮燃燒等技術(shù)措施，煙氣排放指標長期穩(wěn)定優(yōu)于歐盟2010排放標準。
Abstract:- In view of the difficult issues of sludge treatment in a wastewater treatment plant, Xiaoshan 4 000 t/d centralized sludge was treated by the combination of deep dewatering, incineration and power generation. Chemical conditioning and mechanical pressure filtration are adopted in the process of deep dewatering, and the sludge with various moistures can be dewatered to meet the requirement of incineration by the single dewatering process. After dewatering, the sludge moisture was reduced to 45%-50%. After mixing with coal of 10% weight, the sludge was sent to the circulating fluidized bed boiler for incineration. Compared with common coal-fueled power plants, the sludge-to-coal ratio is much higher, thus the sludge incineration capacity has been greatly improved as high as 1 800 t of sludge (moisture 45%) every day. The waste heat of sludge combustion is used for power generation, thus realizing energy conversion and net energy output. The flue gas treatment system is equipped with limestone-gypsum wet desulfurization, electrostatic dust removal, baghouse dust removal, low nitrogen combustion, and other technical measures, thus the gas emission stably outperforms the Directive of EU2010/75/EC in a long run.
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