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楊文文1，阮燕霞1，魏宏斌2，唐秀華，劉立文，黃健
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（1.上海中耀環保實業有限公司，上海 200092；2.同濟大學環境科學與工程學院，上海 200092） |
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摘 要：結合當前直接使用低溫干化設備進行污泥減量干化能耗高、占地面積大等缺點，高壓帶式TJSD連續污泥深度脫水設備能耗低，占地面積小等特點，開發了“高壓帶式TJSD連續污泥深度脫水+低溫干化”聯用工藝。通過現場實驗對比研究污泥進泥性狀、含水率以及污泥出泥含水率對低溫干化設備單位時間去水量的影響，并在此基礎上對比研究了聯用工藝和直接低溫干化（進泥含水率為80%左右）的運行費用、單位功率去水量（SMER）、設備初投資和污泥處理量。實驗結果表明，聯用工藝因為使干化設備使其進泥含水率降低和污泥性狀改良，低溫干化設備單位時間去水量和SMER分別提高了7.2%和5.0%以上。技術經濟分析結果表明，相比于直接采用低溫干化工藝，聯用工藝最多可節約運行費用33.4%以上，設備投資最高可降低30.3%以上，且隨著低溫干化設備出泥含水率的提高，節約效用更加顯著。另外對于現有直接低溫干化項目，通過增設高壓帶式連續污泥深度脫水設備最高可提升200%的污泥處理量。故“高壓帶式TJSD連續污泥深度脫水+低溫干化”聯用工藝從設備運行效率、運行費用、設備初投資和污泥處理量四個方面相比于直接低溫干化均有較大優勢，具備明顯推廣價值。 關鍵詞：高壓帶式TJSD連續污泥深度脫水，低溫干化，聯用工藝，污泥，去水量 中圖分類號：TU992 |
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Research and Application of the Combination of High-pressure Belt Filter for Continuous Deep Dewatering and Low-temperature Sludge Dryer System in sludge deep dewatering。 |
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(1. Shanghai Zhongyao Environment Protection Industry Co. Ltd, Shanghai 200092，China；2. College of Environmental Science and Engineering, Tongji University, Shanghai 200092，China) |
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Abstract：the combination of high-pressure belt filter for continuous deep dewatering and low-temperature sludge dryer system has been developed since the high energy consumption and large area occupation of low-temperature sludge dryer and low energy consumption and high space utilization efficiency of the high-pressure belt filter for continuous deep dewatering technology in sludge dewatering. Influences of sludge structure, moisture content of inlet sludge and moisture content of outlet sludge on the specific moisture extraction have been experimentally studied. The specific moisture extraction, the specific moisture rate (SMER), operating costs, initial investment and sludge processing capacity were discussed on the basis of the experiments. The experiments showed that the specific moisture extraction and SMER increased above 7.2% and 5.0% respectively of the low-temperature sludge dryer when the combination system was applied. On the other hand, a 33.4% and 30.3% of the operating costs and initial investment could be saved while using the combination system, respectively. The effect could be more significant with the increase of the outlet sludge moisture content. The sludge processing capacity of the excited project could be doubled while the combination system was applied. In summary, the combination of high-pressure belt filter for continuous deep dewatering and low-temperature sludge dryer system has notably advantages on operating efficiency, operating costs, initial investment and sludge processing capacity compared with using low-temperature sludge dryer technology separately. Therefore, the collaboration system is significant valuable in dewatering applications. Keywords：high-pressure belt filter for continuous deep dewatering; low-temperature sludge dryer; combination system; sludge; quantity of dewatering |
1引言
目前，污泥的最終處置方式對污泥的含水率和pH值等指標均有嚴格的要求[1]。國內污泥處置要求一般含水率在40~60%之間，且要求pH值在5~10之間[2-5]。高壓帶式TJSD連續污泥深度脫水采用最經濟的機械脫水技術，基本不增加污泥的絕干量[6]，滿足污泥pH值達到處置的中性要求，可將含水率95%~99%污泥（新建項目）或80%左右（改造項目）的污泥降低至70%以下；低溫干化技術可在不使用任何化學藥劑的前提下，將污泥含水率一次性降低到20%以下，但是其能源消耗高、烘干時間長、占地面積大[7]。為克服直接使用低溫干化技術時的上述缺點，本文通過項目現場實驗和運營數據分析探究“高壓帶式TJSD連續污泥深度脫水+低溫干化”聯用工藝的技術和經濟優勢，為污泥減量處理提供一條新型可推廣的低碳工藝路線。
