Two-stage drying and incineration method for sludge

A two-stage, sludge technology, applied in combustion methods, dehydration/drying/thickened sludge treatment, incinerators, etc., can solve high operating costs, limited sludge treatment volume, high energy consumption of sludge incineration technology, etc. problems, to achieve the effects of avoiding secondary pollution, excellent air permeability, and low investment and operation costs

Inactive Publication Date: 2013-05-08
上海金自天正信息技术有限公司
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Problems solved by technology

[0011] The technical problem to be solved by the present invention is: In order to overcome the problems of high energy consumption, high operating cost, and limited sludge treatment capacity in the existing sludge incineration technology, a two-stage dry incineration method for sludge is provided

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  • Two-stage drying and incineration method for sludge
  • Two-stage drying and incineration method for sludge
  • Two-stage drying and incineration method for sludge

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Embodiment Construction

[0026] The present invention will now be described in further detail with reference to the drawings and specific embodiments. These drawings are all simplified schematic diagrams, which merely illustrate the basic structure of the present invention in a schematic manner, so they only show the structures related to the present invention.

[0027] Such as figure 1 As shown, the "two-stage" dry incineration process of sludge is as follows. Wet sludge with a moisture content of more than 80% is chemically modified and dried to make the moisture content 45% to 60%, and then dried with steam The technology performs two-stage drying to reduce the moisture content of the sludge to 35%; dry sludge with a moisture content of 35% enters the sludge incinerator for incineration, and the waste heat generated is enough to reduce the moisture content of the sludge from 60% to 35%. Add any auxiliary fuel; the high-temperature flue gas produced by incineration enters the waste heat boiler to produ...

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Abstract

The invention discloses a two-stage drying and incineration method for sludge. The method comprises the following steps of: modifying and drying, namely adding a prepared modifier into a stirrer through an adding device, mixing the sludge and the modifier uniformly, then delivering the sludge into a modification mechanism, performing modification conditioning, delivering the sludge to a filter pressing system, performing deep dehydration, and reducing the water content of the modified and dried sludge to be 45 to 60 percent; drying with steam, namely reducing the water content of the dried sludge to be 35 percent; and incinerating the sludge and purifying flue gas. By adopting 'two-stage' drying and incineration, any auxiliary fuel is not required; the technology is advanced, the land occupation is low, and the investment cost and the operating cost are low; the volume of the sludge is minimized by incineration, and the reduction degree is highest; pathogens are killed at the high temperature of more than 850 DEG C, and the harmless degree is highest; the sludge incineration speed is high, and secondary pollution when the sludge is stored is avoided; and excellent environment-friendly performance is realized, and the incinerated ash can be recycled.

Description

Technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a two-stage sludge drying and incineration method, which is suitable for urban sludge, printing and dyeing sludge, papermaking sludge, pharmaceutical sludge, chemical sludge and biochemical sludge Sludge treatment in other fields. Background technique [0002] The sludge produced by the sewage treatment plant has high water content, complex composition, unstable, perishable, foul smell, and contains a large amount of organic matter and heavy metals, pathogenic bacteria and parasites (eggs), salts and PCBs, etc. ingredient. Untreated or improperly treated sludge can easily cause serious secondary pollution and environmental damage, contaminate soil, water sources and even the food chain, and to a certain extent even offset some of the results of "pollution reduction". Therefore, how to treat and dispose of sludge from sewage treatment plants reasonably and effectively has be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G7/00C02F11/14
Inventor 王倩李放唐子烨林锋王磊周谦干沈立刚李洋
Owner 上海金自天正信息技术有限公司
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