Efficient and energy-saving sludge heat-drying dehydration device
A high-efficiency, energy-saving, dewatering device technology, applied in the direction of dewatering/drying/concentrating sludge treatment, can solve the problems of high heat source temperature and high energy consumption, and achieve the effect of large heat exchange area, high efficiency and low quality
Inactive Publication Date: 2020-04-21
海南捷信环境工程有限公司
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[0003] Sludge thermal drying technology is currently the most important modern sludge drying technology. Its main working principle is to use the heat energy of flue gas, water vapor or industrial waste heat through an external heat source to exchange heat through the shell of the heat exchanger. Evaporating the moisture in the sludge to dry it currently mainly has the disadvantages of high heat source temperature and high energy consumption. The problem of energy saving and consumption reduction in sludge thermal drying needs to be solved urgently
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[0022] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0023] A high-efficiency and energy-saving sludge thermal drying and dehydration device, such as figure 1 , and its working process is as follows: the dewatered sludge enters the sludge bin 2 from the dewatered sludge inlet 1, after settling, it enters the heat exchange tank 15 after being depressurized by the throttle valve 3, and absorbs the hot dry sludge water at the bottom of the heat exchange tank 15 After steaming, the temperature rises to realize the preheating process, and then enters the vacuum drying tank 8, which is continuously heated by the hollow paddle 7 inside the vacuum drying tank 8, and a large amount of water vapor is evaporated in a vacuum state to realize the dehydration process, and the dry dirt after dehydration The sludge enters the bottom of the absorption heat exchange tank 15,...
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The invention discloses an efficient and energy-saving sludge heat-drying dehydration device. The working process is as follows: dewatered sludge enters a sludge bin from a dewatered sludge inlet; after sedimentation, pressure is reduced through a throttle valve and the dewatered sludge enters a heat exchange tank; the temperature rises after absorbing hot dry sludge steam at the bottom of the heat exchange tank to realize the preheating process; then the sludge enters a vacuum drying tank and is continuously heated by internal hollow blades, and a large amount of water vapor is evaporated ina vacuum state to realize the dehydration process; the dehydrated dry sludge enters the bottom of an absorption heat exchange tank, is driven by a sludge pump after heat exchange and cooling, enters acooling tank for cooling and then enters a storage bin for later use, so that the sludge heat-drying work flow is completed. The hot water end of the heat pump system is of a vacuum superconducting structure, steam produced by the heat pump heats wet sludge, cold water produced by the heat pump serves as cooling water of a condenser, the hot end and the cold end are both fully utilized to achievecomprehensive utilization of energy, and high efficiency and energy conservation are achieved. The device disclosed by the invention operates in a vacuum low-temperature environment and can be drivenonly by a small amount of 40-DEG C heat source.
Description
technical field [0001] The invention relates to the field of sewage treatment, in particular to a high-efficiency and energy-saving sludge thermal drying and dehydration device. Background technique [0002] The moisture content of the sludge after mechanical dehydration is still above 78%. The thermal drying of the sludge can further remove the moisture in the dewatered sludge and reduce the volume of the sludge through the heat transfer between the sludge and the heat medium. After drying, the odor, pathogens, viscosity, and instability of the sludge are significantly improved, and can be used as fertilizers, soil improvers, building materials, landfills, alternative energy sources, or converted into oil and gas before further refining chemical products Wait. Sludge thermal drying technology has been widely used in developed countries such as Europe and the United States. The sludge thermal drying process can effectively separate solid-liquid and sterilize sludge through ...
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IPC IPC(8): C02F11/13
CPCC02F11/13
Inventor 吴向仪
Owner 海南捷信环境工程有限公司