A kind of municipal sludge treatment method
A technology of municipal sludge and treatment method, applied in the field of environmental engineering, can solve problems such as increasing treatment costs, and achieve the effect of improving utilization rate
Active Publication Date: 2019-11-29
ZHE JIANG ECO ENVIRONMENTAL TECH CO LTD
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Problems solved by technology
And doing so will greatly increase the treatment cost, so how to make reasonable use of the heat generated during the sludge heating process is of great significance
Method used
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Embodiment 1
[0025] according to figure 1 As shown, a municipal sludge treatment method uses a drying furnace 1 and a pyrolytic carbonization furnace 2 to perform dehydration and pyrolytic carbonization treatment on municipal sludge, and finally obtain sludge carbides;
[0026] Both the drying furnace 1 and the pyrolysis carbonization furnace 2 adopt a jacketed rotary furnace, that is, both the drying furnace 1 and the pyrolysis carbonization furnace 2 include a rotary furnace chamber and a heating jacket outside the furnace chamber, and the drying furnace 1 Both the pyrolysis and carbonization furnace 2 heat the material in the furnace chamber through the flue gas in the heating jacket, and the heating temperature in the pyrolysis and carbonization furnace 2 is higher than that in the drying furnace 1;
[0027] The drying furnace 1 supplies heat through the auxiliary heating flue gas 3a produced by the drying auxiliary combustion furnace 3 and the pyrolysis furnace jacket flue gas 2a deri...
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The invention relates to the technical field of environment engineering, in particular to a municipal sludge treatment method. A drying furnace and a pyrolysis carbonization furnace are used for carrying out dehydration treatment and pyrolysis carbonization treatment on municipal sludge; jacket type rotary furnaces are adopted as the drying furnace and the pyrolysis carbonization furnace; the drying furnace is supplied with heat by means of auxiliary heating flue gas produced by a drying auxiliary combustion furnace and pyrolysis furnace jacket flue gas led out from a heating jacket of the pyrolysis carbonization furnace; the pyrolysis carbonization furnace is supplied with heat by means of high temperature heating flue gas generated by a mixed combustion furnace. The pyrolysis carbonization furnace is provided with a pyrolysis gas discharge hole, and the pyrolysis gas discharge hole is used for sending pyrolysis gas, produced in a furnace chamber of the pyrolysis carbonization furnace, to the mixed combustion furnace for burning, so that the high temperature heating flue gas can be generated. The municipal sludge treatment method utilizes the pyrolysis gas generated in a sludge carbonization process and recycles the three components, i.e., solid, liquid and gas in a classified way. Furthermore, the temperature difference of the carbonization furnace and the drying furnace is also utilized, and the flue gas in the jacket of the carbonization furnace is used for heating the drying furnace, so that the utilization rate of energy is further increased.
Description
technical field [0001] The invention relates to the technical field of environmental engineering, in particular to a municipal sludge treatment method. Background technique [0002] The sludge treatment process mainly includes sludge heating and treatment of heating products. The traditional sludge heating method is mainly dry heating, and its purpose is to remove the moisture in the sludge. This kind of heating method often adopts a treatment process in which flue gas and sludge are directly contacted and heated. For example, a sludge treatment method disclosed in CN106830619A Use the drying device to dry the sludge by passing the heated gas through the high-temperature gas pipe. However, this heating method will cause the heated gas to be contaminated with impurities in the sludge after the sludge is heated, resulting in an increase in the exhaust pollutants. The exhaust gas must be subsequently treated. Moreover, simply drying and heating the sludge cannot completely an...
Claims
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IPC IPC(8): C02F11/13C02F11/10C10B53/00C10B57/10
CPCC02F11/10C02F11/12C10B53/00C10B57/10Y02W10/40
Inventor 赵维维董博超田汪洋
Owner ZHE JIANG ECO ENVIRONMENTAL TECH CO LTD