Integrated system of using garbage power plant smoke residual heat to dry sludge and sludge power generation

A flue gas waste heat and sludge drying technology, which is applied in oxidation treatment of sludge, dehydration/drying/thickened sludge treatment, incinerator, etc., can solve the problems of high cost, achieve emission reduction, and significant social and environmental benefits Effect

Inactive Publication Date: 2006-03-29
ZHEJIANG UNIV
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Problems solved by technology

[0014] However, the sludge produced from sewage treatment plants and river dredging sludge, through mechanical dehydration, generally has a water content between 75% and 85%. If the sludge is to be combusted, the solid content of the sludge must first reach 100%, which means that a large amount of additional energy is required. According to experiments and calculations, the energy required to completely burn the sludge with a moisture content of 75%-85%, and to dry the sludge to the ignition point is greater than that required for sludge combustion. The energy produced, which is why sludge incineration requires high costs

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  • Integrated system of using garbage power plant smoke residual heat to dry sludge and sludge power generation

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Embodiment Construction

[0019] As shown in the attached figure, the integrated system for drying sludge and sludge power generation by using the waste heat of flue gas in waste-to-energy plants includes a sludge pretreatment system, a feed system, a heat source system, a sludge drying system, a dedusting and degassing system, and a waste Sludge incineration power generation system; the sludge pretreatment system has a trough-type sludge dump (22), and a mixer 23 and a soil biological filter bed 24 are arranged in the trough-type sludge dump; the feeding system has extruded strips connected in sequence machine 1, the first bucket elevator 2 and the first feed port 3; the heating system has a garbage sludge incineration power generation device 11, a composite dust removal device 12, a flue 13, a first induced draft fan 14, The first ventilation pipe 15, the damper 16, and the damper 16 are respectively connected with the first rotary drying kiln 4 and the second rotary drying kiln 9; the sludge drying s...

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Abstract

A system for drying the sludge by the fume afterheat of electric power plant using garbage as its fuel and using the dried sludge to generate electric energy is composed of a sludge pre-treating system, a feeding system consisting of strip extruding unit, bucket belt type conveyer and feeding inlet, a heat source unit, a sludge drying system consisting of the first rotary baking kiln, cooling belt conveyer, pulverizing, the second bucket belt type conveyer, feeding inlet and the second rotary baking kiln, a dust and gas removing system, and a garbage and sludge burning and electric generating system.

Description

technical field [0001] The invention relates to an integrated system for drying sludge and sludge power generation by utilizing the residual heat of flue gas in a garbage power plant. Background technique [0002] Urban domestic sewage and industrial wastewater are treated by sewage treatment plants and discharged after reaching the standard, which is an indispensable environmental engineering measure for the protection of water resources and the construction of urban ecological environment. [0003] The urban sewage treatment system includes two parts: sewage treatment and sludge treatment. In recent years, through the introduction of foreign advanced technology and technological transformation, my country's water treatment technology level has been greatly improved, and various types of sewage can be effectively controlled. However, the sludge treatment technology produced in the process of sewage treatment , is far behind the development of urban sewage treatment technolo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/12C02F11/06F23G5/00
CPCY02E20/12Y02W10/40
Inventor 翁焕新苏闽华
Owner ZHEJIANG UNIV
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