Integrated apparatus and method integrated in anaerobic digester to implement high-fiber material slurrying and scum shell breaking

Abstract

The invention discloses an integrated apparatus and method integrated in an anaerobic digester to implement high-fiber material slurrying and scum shell breaking, the apparatus is composed of a material conveying unit, a chamber unit mounted in the anaerobic digester and a slurry breaking unit, the slurry breaking unit is combined with the chamber unit that has special structural design, inner slurry is circulated during operation, multiple breaking treatments are carried out on high-fiber material, the size of the material discharged out of a material breaking chamber is limited through slurry breaking outlets distributed on the outer wall of the chamber, larger specific surface area for the material is provided, better contact of anaerobic microorganisms with the material is provided, and gas producing efficiency is improved; the integrated treatment implementing high-fiber material slurrying and scum shell breaking in the anaerobic digester enables reduced investment cost, simplified operation steps, lower energy consumption and promising market prospect.

Description

Technical field: [0001] The invention relates to the technical field of anaerobic digestion, in particular to an integrated device integrated in an anaerobic digestion reactor to realize pulping of high-fiber raw materials and removal of scum crusts and a method thereof. Background technique: [0002] Biomass such as straw, plant crops, and cow dung have high fiber content, and they are used as raw materials for anaerobic digestion. They generally need to be pretreated before entering the reactor. For straw, dry cow dung, etc. It also needs to be soaked for a long time, and the current mechanical pretreatment process and equipment have high energy consumption and poor effect. Biochemical pretreatment has problems such as long time and difficult control effect. It presents the characteristics of different sizes and lengths, heterogeneous phase, easy agglomeration, poor fluidity, and floating, which lead to problems such as uneven mixing with anaerobic sludge, long biochemical...

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Problems solved by technology

[0002] Biomass such as straw, plant crops, and cow dung have high fiber content, and they are used as raw materials for anaerobic digestion. They generally need to be pretreated before entering the reactor. For straw, dry cow dung, etc. It also needs to be soaked for a long time, and the current mechanical pretreatment process and equipment have high energy consumption and poor effect. Biochemical pretreatment has problems such as long time and difficult control effect. It presents the characteristics of different sizes and lengths, heterogeneous phase, easy agglomeration, poor fluidity, and floating, which lead to problems such as uneven mixing with anaerobic sludge, long biochemical reaction time, and the interaction between microorganisms and fiber substances in the digested feed liquid , form a biofilm on the surface of the raw material and gradually grow, and the biogas generated in the reactor adheres to the biofilm, which further promotes the floating of the raw material mass, accumulates on the upper layer of the reactor feed liquid, dehydrates and dries to form crusts and feed liquid stratification

[0003] The formation of raw material scum and crust layer has a great impact on the gas production efficiency and operation stability of the anaerobic digestion reactor: First, the floating crust of a large amount of high-fiber raw materials directly leads to the gas produced in the anaerobic digestion reactor Biogas cannot enter the gas sto

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