Low-energy-consumption sludge thermal drying method

• Main Authors: DENG WENYI, CHEN GUANG, ZHOU PIREN, JIANG RUI, JI HONGXIAN, PAN WEI, SU YAXIN
• Format: Patent
• Language: Chinese; English
• Published: 23.11.2021
• Subjects: BLASTING; CHEMISTRY; HEAT EXCHANGE IN GENERAL; HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS,IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT; HEATING; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE; WEAPONS

The invention discloses a low-energy-consumption sludge thermal drying method which is mainly composed of a thermal drying machine, a vacuum pre-drying machine, a primary sludge preheater, a secondary sludge preheater, a primary drying tail gas heat exchanger, a secondary drying tail gas heat exchanger, a vacuum pump and a circulating water system. The vacuum pre-drying machine, the primary/secondary sludge preheater and the tail gas heat exchanger can fully utilize the waste heat of the drying system, and the water content of the sludge is reduced by more than 50% through the vacuum pre-drying machine, so that the energy-saving rate of the thermal drying of the sludge reaches more than 50%. The method can be used for energy-saving transformation or new system construction of an existing thermal drying machine, the energy consumption of the thermal drying machine is greatly reduced, and the method has a wide application prospect. 本发明公开了一种低能耗污泥热力干化方法，该方法主要由热力干化机、真空预干化机、一级和二级污泥预热器、一级和二级干化尾气换热器、真空泵、和循环水系统所组成，其中真