Sludge Comprehensive Disposal System and Method

Abstract

The invention discloses a sludge comprehensive disposal system and method. The sludge comprehensive disposal system includes: a drying device; a gas-liquid separation device, which has a dry cold flue gas inlet, a first mixed gas inlet, a separated gas outlet, a water outlet, and an exhaust gas outlet; a first dry distillation device, which has a first sludge Inlet, the first dry distillation hot flue gas inlet, the first sludge outlet, the first dry distillation cold flue gas outlet and the second mixed gas outlet; the second dry distillation device has a second sludge inlet, a second dry distillation hot flue gas inlet 1. The second dry distillation cold flue gas outlet and the pyrolysis charcoal outlet; the mixed gas recycling device has a second mixed gas inlet, a water vapor outlet and a pyrolysis gas outlet. The sludge comprehensive disposal system can perform two-stage dry distillation treatment after the sludge to be treated is dried, so as to obtain high-quality dry distillation products. At the same time, the high-temperature medium generated in the system can be reasonably distributed, thereby improving the thermal efficiency of the system and reducing energy consumption.

Description

technical field [0001] The invention relates to the technical field of harmless treatment and resource utilization of sludge, in particular, the invention relates to a comprehensive sludge disposal system and method. Background technique [0002] Sludge pyrolysis is a process of decomposing organic matter in sludge to produce pyrolytic carbon, pyrolysis gas and trace tar in an anaerobic atmosphere. It has the advantages of harmlessness and thorough reduction, environmental friendliness and high degree of resource utilization. . The pyrolytic carbon (or biochar) obtained by sludge pyrolysis has more micropores and specific surface area, and contains high fixed carbon content and rich N, P, K and other nutrients, and has good water retention and slowing down. The effect of releasing and increasing soil fertility, the potential of soil resource utilization is huge. However, the high water content in sludge leads to high energy consumption in the sludge pyrolysis process, and ...

AI Technical Summary

Problems solved by technology

However, the high water content in the sludge leads to high energy consumption in the sludge pyrolysis process, and the process of sludge pyrolysis biochar for soil remediation needs further improvement

[0003] At the same time, the separation of tar and water produced by sludge pyrolysis is difficult, and the recovery cost is high. If it is directly discharged into the sewage pipeline, it will have a great impact on the subsequent sewage treatment, especially in the membrane sewage treatment process, which is easy to cause damage to the membrane. damage

Therefore, the existing sludge treatment methods still need to be improved

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