Anaerobic vertical plug-flow reactor

Abstract

The invention relates to an anaerobic vertical plug-flow reactor. The anaerobic vertical plug-flow reactor is characterized by comprising a reaction main body, a charging system, a discharging system, a returning system, a gas collecting device and a heat preservation device, wherein a conical flow guide plate is arranged on the bottom surface in the reaction main body; a cylindrical partition plate is arranged right above the flow guide plate on the top surface of the reaction main body; a plurality of holes are formed in the side surface of the lower end of the partition plate; the partition plate is used for dividing the inner space of the reaction main body into a first space and a second space; a charging hole and a first gas discharging hole are formed in the top surface of the first space; a second gas discharging hole is formed in the top surface of the second space; a discharging hole is formed in the upper end of the side wall of the reaction main body; the charging system is connected with the charging hole; the discharging system is connected with the discharging hole; the discharging system is connected with a charging plug-flow system by virtue of the returning system; the gas collecting device is connected with the first gas discharging hole and the second gas discharging hole; the heat preservation device is used for measuring and controlling the temperature in the reaction main body in real time. The anaerobic vertical plug-flow reactor is widely applied to anaerobic fermentation of small-density materials.

Description

technical field [0001] The invention relates to a biogas fermentation equipment, in particular to an anaerobic vertical plug-flow reactor. Background technique [0002] The plug flow reactor (Plug Flow Reactor, PFR) is also called the plug flow reactor, the material enters from one end and flows out from the other end, presenting a piston-like moving state. The material exhibits strong hydrolysis and acidification in the feeding section, and the generation of methane is enhanced as the material flows to the discharging direction. Reflux was performed due to the lack of inoculum in the feed. No stirring device is needed, the structure is simple, and it is suitable for the treatment of high suspended solids. However, when dealing with wet fermentation of materials with low density such as straw, due to the low density of materials, it is easy to form scum floating on the upper part of the anaerobic reactor, resulting in separation. layer, which affects the contact between mi...

AI Technical Summary

Problems solved by technology

No stirring device is needed, the structure is simple, and it is suitable for the treatment of high suspended solids. However, when dealing with wet fermentation of materials with low density such as straw, due to the low density of materials, it is easy to form scum floating on the upper part of the anaerobic reactor, resulting in separation. layer, which affects the contact between microorganisms and materials, and the operating efficiency is low

And due to stratification, the concentration of TS in the discharge is unstable, and it is difficult to control the hydraulic retention time and organic load rate during continuous operation

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