Cooperative treatment method and device for household garbage, municipal sludge and kitchen garbage

Abstract

The invention discloses a household garbage, municipal sludge and kitchen garbage co-processing method and device. The household garbage is fed into a pyrolysis gasification furnace to be combusted and decomposed; municipal sludge and kitchen waste are mixed to form sludge waste, the sludge waste is transferred into an anaerobic fermentation tank for fermentation after being subjected to thermal hydrolysis treatment, and biogas generated in the anaerobic fermentation tank is used as external fuel; and the biogas slurry in the anaerobic fermentation tank is precipitated and filtered, then is introduced into a quench tower in the flue gas purification system in a spray form and is used as desuperheating water, and the flue gas is primarily deacidified in the quench tower through the alkalescence of the desuperheating water. The method not only solves the problem of solid waste garbage treatment and purifies the environment, but also can realize resource waste heat utilization and heat supply, heat supply or power generation, does not discharge waste water such as biogas slurry, and realizes energy cyclic utilization.

Description

technical field [0001] The invention relates to the field of waste treatment and reuse equipment, in particular to a method and device for co-processing domestic waste, municipal sludge and kitchen waste. Background technique [0002] The treatment of domestic waste, municipal sludge and kitchen waste is an important part of the current urban municipal infrastructure construction. It is an important task at all levels to realize the "reduction, harmless and resourceful" disposal of domestic waste, municipal sludge and kitchen waste. It is an important starting point for the government to build a "beautiful city", and it is also an important way to turn waste into wealth, save energy and reduce emissions. However, building factories separately for disposal not only requires high investment and occupies a large area, but also consumes a lot of energy and wastes a lot. [0003] Household waste is generally treated by incineration, and pyrolysis gasification treatment is a bene...

AI Technical Summary

Problems solved by technology

To solve this problem, a large amount of supplementary fuel is generally required to support combustion, otherwise a large amount of dioxin emissions will be generated, which will significantly increase the cost of waste disposal, and will not achieve the purpose of pollution prevention and control

However, there are certain difficulties in the resource utilization of biogas slurry in rural areas. Due to the limitations of seasons, transportation, and environmental conditions, especially the high cost of transportation links, it is not conducive to the reuse of biogas slurry.

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