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Method and its device for burning mixed mud in circulating fluidized bed boiler

A technology of circulating fluidized bed and sludge, which is applied in the direction of fluidized bed combustion equipment, combustion method, combustion equipment, etc., can solve the problem of occupying a large space and so on.

Inactive Publication Date: 2005-05-18
WUXI HUAGUANG BOILER
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Problems solved by technology

As a result, when the sludge is disposed of by landfill, it takes a lot of space (it will collapse after being piled up), so ordinary landfill plants are unwilling to accept this sludge, and a sewage treatment plant with a daily processing capacity of 100,000 tons 100 tons of such high-moisture sludge are produced every day

Method used

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  • Method and its device for burning mixed mud in circulating fluidized bed boiler

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Embodiment Construction

[0007] The application of this technology is to use the circulating fluidized bed boilers of thermal power plants in various regions. Through partial transformation, a sludge feed port 4 is arranged on the upper end of the circulating fluidized bed boiler 3, and the conveying pipeline 2 is connected to the sludge feed port 4. The other end of the delivery pipe 2 is connected to the output port of the sludge plunger pump 1 . While the boiler is burning coal, the sludge generated in the sewage treatment process does not need to be processed in advance, and is pumped directly to the circulating fluidized bed boiler in the upper negative pressure area of ​​the furnace. In the upper part of the furnace, the sludge falls into the dense-phase area of ​​the lower part of the furnace by its own weight, and is immediately surrounded by a large number of hot bed materials. The heat and mass transfer is very strong. The circulating fluidized bed boiler itself has high combustion heat inten...

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Abstract

The present invention relates to environment protecting technology, and is especially method and apparatus for burning mixed mud in circulating fluidized bed boiler. According to the design scheme, the circulating fluidized bed boiler has mud feeding port in the upper part and connected to conveying pipeline and mud plunger pump. The mixed mud burning method includes feeding mud with water content of 78-82 % and in the amount of below 50 % of fuel weight into the circulating fluidized bed boiler via the negative pressure area in the upper part of the hearth; and stoving and burning mud to kill harmful microbes including pathogenic bacteria and eliminate bad smell at 850-950 deg.c. The present invention provides a way of reducing amount of mud and harmlessly treating mud for sewage treating yard.

Description

technical field [0001] The invention relates to environmental protection technology, in particular to a method for mixing and burning sludge in a circulating fluidized bed boiler. Background technique [0002] With the continuous deepening of the country's treatment of sewage, sewage treatment plants in cities and towns have been built and put into operation. What follows is that the sludge produced by the sewage treatment plant in the process of sewage treatment has begun to become a new source of pollution. After the coagulant is added in the process of sewage treatment, the sludge will settle down to form sludge, which has a high internal water content. After passing through the bag press, the water content of the sludge still reaches about 80%, and it is difficult to use conventional methods to dispose of these sludge. Intrinsic moisture removal from sludge. As a result, when the sludge is disposed of by landfill, it takes a lot of space (it will collapse after being p...

Claims

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Application Information

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IPC IPC(8): F23C10/00F23G5/30F23G5/44
Inventor 苏小平吴文伟沈解忠李俊
Owner WUXI HUAGUANG BOILER
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