High-moisture solid waste drying and efficient blending combustion treatment system and method
A high-moisture, drying technology, applied in dehydration/drying/concentrated sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems affecting combustion stability, furnace corrosion damage, etc., to achieve Reduce the carbon content of fly ash, increase the average heat transfer temperature difference, and facilitate erection
Active Publication Date: 2020-07-14
XI AN JIAOTONG UNIV
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Problems solved by technology
However, as a fuel with high water content, sludge will inevitably affect the combustion stability and cause certain corrosion damage to the furnace if it is directly sent to the combustion equipment for combustion.
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[0028] The present invention is described in further detail below in conjunction with accompanying drawing:
[0029] see figure 1, a system for high-moisture solid waste drying and high-efficiency co-firing treatment provided by the present invention includes an extrusion dehydration part composed of a sludge inlet 1, an eccentric extrusion dehydration device outlet 2, and an eccentric extrusion dehydration device 3; metal Chain conveyor belt 4, solar preheating drying part composed of Fresnel lens 5; gas dryer inlet 6, gas dryer 7, serrated scraper 8, motor 9, drive shaft 10, dryer gas inlet 11 , dry exhaust gas outlet 12, flue gas dryer sludge outlet 16, flue gas convection heat exchange drying part composed of boiler tail flue exhaust port 24, the exhaust part is selected between the high temperature economizer 25 and the low temperature economizer 26 area; circulating water inlet 13, condensing water return device 14, recycled water and circulating water outlet 15, water ...
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The invention discloses a high-moisture solid waste drying and efficient blending combustion treatment system and method. Aiming at the characteristics that the moisture content in high-moisture solidwaste such as sludge generally exceeds 80% and the high-moisture solid waste has a certain heat value, the invention provides a three-stage solid waste drying system consisting of extrusion dehydration, solar focusing preheating drying and flue gas strong convection drying, so that gradient utilization of energy in a sludge drying process is realized. The dried sludge is fed into the power station boiler for efficient blending combustion, and the combustion working condition is optimized and adjusted by reasonably arranging the combustion area, so that the heat of the sludge is fully utilized, and meanwhile, the sufficient degradation of harmful substances in the sludge is ensured. According to the system, moisture in the sludge is recycled while the sludge is treated, and harmless treatment of the sludge and full utilization of energy are achieved.
Description
technical field [0001] The invention belongs to the technical field of thermal power generation, and in particular relates to a system and method for drying high-moisture solid waste and high-efficiency co-firing treatment. Background technique [0002] With the development of urbanization in our country, the population of cities and towns has increased sharply, and the amount of urban sewage generated is increasing day by day. Even if the city is equipped with corresponding sewage treatment plants, the huge amount of sludge produced after sewage treatment will pose a huge challenge to environmental protection. Directly dumping or landfilling sludge in sewage treatment plants will cause serious secondary pollution. At the same time, sludge is not only a pollutant, but also a fuel with a certain calorific value. However, as a high-moisture fuel, sludge will inevitably affect the combustion stability and cause certain corrosion damage to the furnace if it is directly sent to...
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IPC IPC(8): C02F11/121C02F11/13B02C18/00B02C18/12
CPCB02C18/0084B02C18/12C02F11/121C02F11/13
Inventor 王长安毛崎森王超伟冯芹芹杜勇博车得福
Owner XI AN JIAOTONG UNIV