Sludge drying and incinerating integrated zero-discharge treatment system and treatment process
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A sludge drying and sludge incineration technology, applied in dewatering/drying/concentrating sludge treatment, incinerators, indirect carbon dioxide emission reduction, etc. The effect of mature equipment structure and reasonable and compact system
Inactive Publication Date: 2012-07-04
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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[0009] The high water content in municipal sewage sludge is a key issue that makes the treatment of this type of waste expensive and difficult
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[0028] The invention provides a zero-emission treatment system and treatment process integrating sludge drying and incineration. Be described below in conjunction with accompanying drawing.
[0029] figure 1 Shown is a schematic diagram of the structure and process flow of an integrated sludge treatment process with zero discharge of flue gas pollutants. In the figure, the waste-sludge drying and incineration integrated zero-emission treatment system shown in the figure is connected as a waste storage pit 1, a waste-sludge incinerator 3, a cyclone separator 4, a waste heat boiler 5 and a steam turbine generator set 7 The air separation unit 2 is connected to the garbage-sludge incinerator 3; the waste heat boiler 5 is connected to the bag filter 6, and the bag filter 6 has two flue gas outlets, which are respectively connected to the garbage-sludge incinerator 3 and sludge The first-stage dryer 10 is connected; the sludge first-stage dryer 10 is followed by a fine powder sep...
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Abstract
The invention discloses a sludge drying and incinerating integrated zero-discharge treatment system and treatment process, belonging to the technical field of harmless treatment of sludge. The treatment system is composed of a garbage storage pit, an air separation device, a garbage-sludge incinerator, a cyclone separator, a waste heat boiler, a bag-type dust remover, a turbo-generator set, a two-stage drier, a dried sludge storage bin, a fine powder separator, a condenser, a steam-water separator, and a carbon dioxide purifying and catching system. According to the invention, the dried sludge burns sufficiently in oxygen-rich atmosphere, the auxiliary fuel is saved, the incinerating waste heat is efficiently recovered and utilized, CO2 in discharged flue gas is cooled, purified, compressed and liquefied to ultimately obtain high-purity CO2 which can be used for industrial application, other impurities are recovered, dioxin and other extremely toxic substances are collected separately and conveyed to qualified divisions for unitized treatment, the purposes of treating a waste with another waste and promoting harmless treatment with resource treatment are realized, the waste treatment cost is lowered and the energy utilization rate is improved.
Description
technical field [0001] The invention belongs to the technical field of harmless treatment of garbage, and in particular relates to a zero-emission treatment system integrating sludge drying and incineration for drying, incineration, waste heat utilization of incineration and discharge of pollutants such as flue gas with high water content and Processing technology. Background technique [0002] With the rapid development of my country's economy, the acceleration of urbanization process, the popularization of sewage treatment plants and the rapid development of sewage treatment technology, the sludge production in my country is increasing day by day, causing great pressure on the environment. Existing sludge disposal methods include sludge landfill, sludge agricultural use, sludge drying and heat treatment, and sludge incineration. [0003] Sludge landfill has its own disadvantages. The pollutants in the sludge still exist, which is easy to cause secondary pollution; a certa...
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