Energy-saving system applied to sludge treatment and disposal
An energy-saving system and sludge treatment technology, applied in sludge treatment, water/sludge/sewage treatment, dehydration/drying/thickened sludge treatment, etc., can solve low heat utilization efficiency, heat waste, waste liquid discharge Major problems, to achieve the effect of improving the utilization rate of waste heat, reducing energy consumption and ensuring quality
Inactive Publication Date: 2012-06-27
BEIJING LONDIAN HONGTAI ENVIRONMENTAL TECH
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The waste heat steam from the sludge heat drying machine is condensed by the cooling water in the direct contact condenser, and the non-condensable gas is drawn out by the process fan into the deodorization system, and the condensed waste liquid is discharged to the Sewage treatment plants, the waste heat in the condensed waste liquid is also taken away with the discharge of the condensed waste liquid. Due to the large amount of waste liquid discharge and the waste of heat, the overall heat utilization efficiency of the system is low
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[0019] Below in conjunction with case the specific embodiment of the present invention is further described:
[0020] A sewage treatment plant has a daily sludge treatment volume of 75tDS / d, and the moisture content of the sludge at the inlet of the drying machine is 75%±3%, that is, the solid content rate is 25%±3%. It is required to increase the solid content of the sludge at the outlet of the drying machine to 90%, set up two production lines, and each production line can handle 150tWS / d of wet sludge. The sludge dryer adopts an indirect contact double-blade dryer. The drying heat medium uses hot steam, and a gas or biogas boiler is used to provide high-temperature steam.
[0021] Using the patent of the present invention to process the sludge drying waste steam in this case, the specific implementation method is as follows:
[0022] The temperature of the waste heat steam from the sludge thermal drying machine is about 95°C~100°C. Under the action of the process fan (2), ...
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The invention relates to the field of energy-saving environment protection, in particular to an energy-saving system applied to sludge treatment and disposal. According to the invention, aiming at solving problems of large waste water discharge, large heat waste, lower system integral heat utilization efficiency and the like in the traditional sludge heat drying waste vapor treatment system, low temperature waste heat in a waste condensed fluid is recycled by using a lithium bromide absorbing type heat pump unit, medium temperature heat source which can be used by sludge digestion tank is output, and the heating vapor or heat conducting oil of a sludge heat drying machine is used as a driving heat source of the lithium bromide absorbing type heat pump unit; meanwhile, a circulating cooling water pump is arranged to reduce the waste water discharge. According to the invention, in the whole sludge heat drying treatment process, a large quantity of low temperature heat discharged with the waste condensed fluid are recycled by using a small quantity of high temperature heat sources so that the waste heat utilization efficiency of the system is increased and the energy consumption and waste water discharge in the whole sludge treatment and disposal process are reduced; therefore, the whole operation cost is saved.
Description
technical field [0001] The invention relates to the field of energy saving and environmental protection, in particular to an energy saving system applied to thermal drying treatment and disposal of sludge. Background technique [0002] According to the "Guidelines for Best Available Technologies for Pollution Prevention and Control of Sludge Treatment and Disposal in Urban Sewage Treatment Plants (Trial)", "The process of sludge volume reduction, volume reduction, stabilization and harmlessness in urban sewage treatment plants is called sludge treatment", Such as sludge anaerobic digestion. "The final disposal method in which the treated sludge or sludge products achieve long-term stability in the environment or in the process of utilization and does not have harmful effects on human health and the ecological environment is called sludge disposal", such as sludge incineration, Sludge land use, sanitary landfill, comprehensive utilization, etc. At present, the calorific val...
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IPC IPC(8): C02F11/12C02F11/00F25B15/06
CPCY02B30/52Y02B30/62Y02A30/27
Inventor 徐杰英刘惠勇赵江翔李圣良项光明
Owner BEIJING LONDIAN HONGTAI ENVIRONMENTAL TECH
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