Method for judging proper blending proportion and proper sludge water content of sludge blending combustion
A technology of moisture content and sludge, applied in the field of mixed combustion of waste, can solve the problems of high economic cost, soil and groundwater pollution, chronic poisoning of humans, animals and plants, etc., to ensure safety, ensure safe and normal operation, and save experimental costs. and the effect of time
Pending Publication Date: 2022-07-22
SUZHOU XIRE ENERGY SAVING ENVIRONMENTAL PROTECTION TECH CO LTD +2
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Problems solved by technology
Because sludge contains metal poisons and a large number of pathogenic bacteria, it may cause chronic poisoning to people, animals and plants when used for land use; landfill is a treatment method with low cost, but due to the gradual increase of land price, the economic cost of landfill is too high High, and the landfilled sludge may cause soil and groundwater pollution
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[0066] The coal type used in this embodiment is the coal type designed by a power plant, and the sludge is selected from sludge with different moisture contents from a municipal sludge treatment plant.
[0067] In the following table, M ar For the application base moisture content, A ad is the ash content on an air-dried basis, FC ad Fixed carbon content for air drying basis, V daf For dry ashless base volatile content.
[0068] The results of industrial and elemental analysis of coal and fully dried sludge are shown in Table 1 below:
[0069] Table 1 Industrial analysis and elemental analysis of coal and sludge
[0070]
[0071] The urban sludge was dried to a moisture content of 20% and 40%, and the mixing ratio with coal was 1:20, 1:10, and 1:6. The names of the samples were: 20% moisture content sludge was named as The sludge with 20WN and 40% moisture content was named 40WN; the sludge with 20% moisture content was named as 20-20WN, 10-20WN, 6-20WN; in the same w...
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The invention discloses a method for discriminating a proper blending ratio and a proper sludge water content for sludge blending combustion, which comprises the following steps: respectively configuring sludge with different water contents with raw coal according to different blending ratios to obtain sludge blending combustion analysis samples with different specifications; carrying out thermogravimetric analysis on the sludge blending combustion analysis sample; performing stable combustion characteristic analysis by adopting the stable combustion discriminant index; the contamination and slagging performance is analyzed and predicted through the ash component contamination comprehensive index Ru and the ash component slagging comprehensive index R; and judging whether the thermogravimetric analysis result, the stable combustion characteristic analysis result and the slagging judgment analysis result of the sludge-coal mixture all meet the conditions or not so as to judge whether the mixing proportion of the sludge-coal mixture with the corresponding specification and the water content of the sludge are appropriate or not. According to the method, the proper blending combustion proportion and the sludge moisture content can be judged from the two aspects of the combustion characteristic and the slagging characteristic, so that safe and normal operation of the boiler is ensured.
Description
technical field [0001] The invention relates to the technical field of waste blending and burning, in particular to a method for judging the suitable blending ratio and the suitable sludge moisture content for sludge blending and burning. Background technique [0002] With the acceleration of urbanization, the amount of urban sewage treatment has increased year by year, and the sludge production has also increased sharply. Sludge is a heterogeneous body composed of organic debris and inorganic particles, bacteria and colloids. It contains metal poisons and a large number of pathogenic bacteria. Some pollutants dissolve in water and cause water pollution. serious pollution to the environment. In 2016, the "National Urban Sewage Treatment and Recycling Facilities Construction Plan" proposed to vigorously promote the disposal of sludge harmless, stabilized and reduced. %. [0003] At present, sludge disposal methods mainly include land use, landfill and incineration. Becaus...
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IPC IPC(8): G01N5/04G01N25/04G01N23/223G01N31/12
CPCG01N5/045G01N25/04G01N23/223G01N31/12
Inventor 卿梦磊王乐乐雷嗣远鲍强唐荣富孔凡海杨晓宁陈飞云姚燕马云龙王凯
Owner SUZHOU XIRE ENERGY SAVING ENVIRONMENTAL PROTECTION TECH CO LTD