A method for preparing sludge charcoal by mechanical dehydration coupled with drying and pyrolysis
A technology of sludge charcoal and sludge, applied in dehydration/drying/thickening sludge treatment, pyrolysis treatment of sludge, chemical instruments and methods, etc., can solve the risk of dioxin emissions, power plant boilers are not equipped with dioxins and other issues to achieve important social and environmental benefits, complete reduction and cost reduction
Active Publication Date: 2020-06-16
SHANDONG JINFU ENVIRONMENTAL ENG CO LTD
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Problems solved by technology
However, the incineration method is prone to produce dioxins, and dioxins will be produced when the sludge is blended in the existing boilers. Almost all power plant boilers are not equipped with dioxin treatment facilities, and there is a risk of dioxin emissions
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[0017] The following are specific examples of the present invention, further describing the technical solutions of the present invention, but the protection scope of the present invention is not limited to these examples. All changes or equivalent substitutions that do not depart from the concept of the present invention are included in the protection scope of the present invention.
[0018] Such as figure 1 As shown, a method for preparing sludge charcoal by mechanical dehydration coupled with dry pyrolysis, including sludge receiving and storage, mechanical extrusion dehydration, thermal dispersion and drying, medium temperature pyrolysis carbonization, heavy metal solidification, and carbon material cooling packaging, Specific steps are as follows:
[0019] (1) The wet sludge with a moisture content of about 80% transported by the sewage plant truck is sent to the sludge receiving storage bin 2 after being weighed and measured by the truck scale 1 for receiving and tempora...
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The invention relates to a method for preparing sludge carbon by mechanically dehydrating coupling drying pyrolysis. The method comprises the following steps: sludge receiving storage, mechanical extrusion dehydration, thermal scattering drying, intermediate temperature pyrolysis carbonization, heavy metal curing, and carbon material cooling package; the high-moisture (80%-90%) wet sludge is prepared into a carbon material through deep mechanical extrusion dehydration, thermal drying, pyrolysis carbonization, and heavy metal curing and like process. The sewage treatment cost can be reduced, and the sewage can be thoroughly reduced, no dioxin is produced in the process, the heavy metal in the sludge is cured, the nitrogen, phosphorous, potassium and like nutrient elements in the sludge areretained, the product sludge carbon can be safely applied to the landscaping nutrient soil or fuel, a new outlet is searched for the resource utilization of the sludge, and important social benefit and environment benefit are provided.
Description
technical field [0001] The invention relates to the field of sludge treatment, in particular to a method for preparing sludge charcoal by coupling mechanical dehydration with dry pyrolysis. Background technique [0002] With the rapid development of my country's social economy and urbanization process, the scale of urban sewage treatment plants has continued to expand, and the amount of sludge produced has also increased significantly. At present, sludge disposal methods mainly include aerobic composting, landfill, and incineration. [0003] Sludge aerobic composting can utilize the organic components in the sludge, but since the heavy metals in the sludge cannot be solidified during the composting process, there is a risk of being released into the environment. The Ministry of Agriculture strictly prohibits the sludge fertilizer from entering the farmland. A large amount of base material needs to be added, which not only does not reduce the amount, but also causes an incre...
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IPC IPC(8): C02F11/00C02F11/121C02F11/13C02F11/10C10B53/00
CPCC02F11/00C02F11/008C02F11/10C02F11/12C02F11/121C02F2101/20C02F2303/06C10B53/00Y02W10/40
Inventor 孟辉景元琢周学坤肖培蒙强宁
Owner SHANDONG JINFU ENVIRONMENTAL ENG CO LTD