Comprehensive treatment process and system for preparing gas fertilizer by cooperation of biological drying and gasification of sludge
A biological drying and comprehensive treatment technology, applied in the field of sludge energy treatment, can solve problems such as groundwater pollution, land use disputes, and impact on public environmental sanitation, and achieve the effect of improving the quality of gas
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[0049] The present invention will be further described below in conjunction with the accompanying drawings.
[0050] refer to figure 1 and figure 2 , a comprehensive treatment process for sludge biological drying and gasification to produce gas fertilizer. Firstly, mechanical pressure filtration is used to dehydrate the remaining sludge with a moisture content of about 80%, and the moisture content is reduced to 55-65%. Inexpensive and easy-to-obtain biomass powder conditioning the wet sludge after press filtration for further dehydration treatment by biological drying, and the moisture content is reduced to 30-40%; the addition of biomass powder takes into account the characteristics of the sludge and the improvement of the calorific value of the sludge itself, etc. Advantages, after secondary dehydration, the sludge is sent to the low-temperature gasifier to obtain carbon fertilizer, and the high-temperature tar gas generated during the treatment process is purified by pho...
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