Municipal sludge and garden waste synergistic resource treatment method and system

Abstract

The invention discloses a municipal sludge and garden waste synergistic resource treatment system which comprises a material mixing unit, a biomass gasification unit and a drying and destructive distillation unit; and the material mixing unit comprises a garden waste crusher, a municipal sludge filter press and a mixing bin connected with the crusher and the filter press respectively; the biomassgasification unit comprises a gasification furnace, a combustion chamber and a boiler which are connected in sequence, the gasification furnace is connected with the garden waste crusher, and a steamoutlet is formed in the boiler; the drying and destructive distillation unit comprises a steam dryer, a destructive distillation unit and a discharge bin which are connected in sequence, a feed port,a steam inlet and a discharge port are formed in the steam dryer, the feed port is connected with the mixing bin, the steam inlet is connected with a steam outlet of the boiler, and the discharge portis connected with the destructive distillation unit. According to the system, the biomass gasification unit and the drying and destructive distillation unit are organically combined, municipal sludgeand garden waste are cooperatively resourcefully treated, internal energy circulation is achieved in the system operation process, and energy consumption is remarkably reduced.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment, in particular to a method and system for collaborative resource disposal of municipal sludge and garden waste. Background technique [0002] With the construction of a large number of sewage treatment plants in my country and the implementation of standard upgrading and renovation projects, the output of municipal sludge has continued to increase. The sludge contains a large number of microorganisms, parasite eggs, harmful heavy metals and refractory substances, as well as a large number of trace elements. , organic matter, etc., so the resource utilization of municipal sludge has always been concerned. The preparation of biochar by sludge dry distillation is one of its resource disposal technologies. It can kill microorganisms through high-temperature pyrolysis under anaerobic conditions, solidify heavy metals, form biochar and serve as a soil conditioner. For example, "a method of...

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Problems solved by technology

[0004] The present invention aims to overcome the problems in the prior art that a large amount of external energy supply is required in the resource utilization process of municipal sludge, and the disposal cost is high; while the garden waste treatment process easily causes secondary pollution and waste of biological resources, and provides A method and system for collaborative resource disposal of municipal sludge and garden waste, which organically combines biomass gasification of garden waste with drying and distillation of municipal sludge, and collaborative resource disposal of municipal sludge and garden waste, thereby Realize the comprehensive disposal of urban organic waste, realize the internal energy cycle during the operation of the system, and significantly reduce energy consumption; and the biochar produced by the system has high added value, which can be used for soil improvement and restoration, preparation of adsorbents, and substrate raw materials for nursery cultivation, etc.

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