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Municipal sludge incinerating system using rubbish landfill gas as auxiliary fuel

A technology of landfill gas and municipal sludge, applied in the direction of combustion method, combustion type, dehydration/drying/concentrated sludge treatment, etc., can solve the problems of high cost of sludge incineration, multiple auxiliary fuels, etc., and reduce incineration treatment The cost and economic benefits are obvious, and the effect of improving incineration efficiency

Active Publication Date: 2009-09-23
南京碳环生物质科技有限公司
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Problems solved by technology

The single combustion technology uses special sludge incinerators, such as multi-layer incinerators, fluidized bed incinerators, and multi-layer fluidized bed incinerators. In order to improve incineration efficiency, more auxiliary fuel is required, resulting in lower sludge incineration costs high

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  • Municipal sludge incinerating system using rubbish landfill gas as auxiliary fuel

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with accompanying drawing:

[0012] Such as figure 1 As shown, the municipal sludge with a water content lower than 90% after dehydration in the sewage treatment plant is stored in the sludge storage bin before being dried. Moisture content changes after rain. Municipal sludge is first dried. The thermal energy of the sludge drying equipment comes from landfill gas. The high-temperature steam generated by the steam boiler burning landfill gas can be used to dry the sludge. The steam pressure is 3-10 It can also use gas furnaces to burn landfill gas to generate high-temperature flue gas with a temperature between 220-300 ° C and use it to dry sludge. The exhaust gas produced in the steam drying furnace or flue gas drying furnace is extracted by a fan as the secondary air of the sludge incinerator to reduce the odor generated during the drying process. The moisture content of the dried sludge after dr...

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Abstract

The invention provides a municipal sludge incinerating system using rubbish landfill gas as auxiliary fuel. Dehydrated municipal sludge is incinerated after being dried and smashed, an incinerator used for incineration adopts a bubbling fluidized bed incinerator, primary air combusted and heated by the rubbish landfill gas is blown into and the rubbish landfill gas is led into to be used as the auxiliary fuel so as to maintain the temperature of a fluidized bed in the sludge incinerator. The invention greatly improves the incineration efficiency of the municipal sludge, fully utilizes the heat energy of the rubbish landfill gas, lowers the incineration treating cost of the municipal sludge, and achieves the purposes of treatment of a waste by another waste, energy saving and environment protection and remarkable economic benefit.

Description

technical field [0001] The invention relates to an urban sludge incineration treatment technology. Background technique [0002] At present, there are two main types of municipal sludge incineration treatment technologies: mixed combustion and single combustion. Mixed combustion technology is to send dehydrated sludge to waste incineration plants and coal-fired thermal power plants as a blended fuel for combustion. This method has strict requirements on the water content and addition ratio of sludge, and is not suitable for large-scale disposal. of sludge. The single combustion technology uses special sludge incinerators, such as multi-layer incinerators, fluidized bed incinerators, and multi-layer fluidized bed incinerators. In order to improve incineration efficiency, more auxiliary fuel is required, resulting in lower sludge incineration costs high. Contents of the invention [0003] The purpose of the present invention is to reduce the cost of incineration treatment...

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Application Information

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IPC IPC(8): F23G7/00C02F11/12
Inventor 陈泽智龚惠娟
Owner 南京碳环生物质科技有限公司
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