Internal power pneumatic automatic intermittent circulator

Abstract

The invention discloses a device which achieves pneumatic automatically-intermittent circulation by adopting gas generated in an anaerobic digester as internal power. The device is characterized in that a circulation loop is formed by feeding a gas collecting tank 11, a water level control gas valve 6, a gas collecting hood 12, a gas (water) inlet pipe 3, a reflux pipe 5 and a check valve 14 to the bottom of a digestion area 13 together. When the water level control gas valve 6 is closed, biogas continuously enters the gas collecting tank 11 by virtue of a gas seal 4, the gas collecting hood 12 and the gas (water) inlet pipe 3 to ensure that pressure in the gas collecting tank 11 is continuously increased, and a material liquid in the gas collecting tank 11 is forced to enter the bottom of the digestion area 13 by virtue of the reflux pipe 5 and the check valve 14. When the water level of the gas collecting tank 11 is lowered to the set water level, the water level control gas valve 6 is automatically opened, and the gas in the gas collecting tank is continuously exhausted; when the water level in the gas collecting tank 11 reaches the set low water level, the water level control gas valve 6 is automatically opened, the pressure in the gas collecting tank 11 is reduced, water in the upper part of the digestion area is absorbed into the gas collecting tank by virtue of the gas (water) inlet pipe 3, and when the water level in the gas collecting tank 11 reaches the set high water level, the water level control gas valve 6 is automatically closed. The gas collecting tank enters the next round of water discharge, gas exhaust and water absorption circulation so as to achieve internal power automatically-intermittent circulation.

Description

[0001] Technical field [0002] The invention relates to an anaerobic digester, which is the core equipment in the anaerobic digestion process, in particular to provide an internal dynamic air pressure type automatic intermittent circulation device for the anaerobic digester. Background technique [0003] At present, anaerobic digesters are used in many aspects such as bioenergy production, municipal garbage, sewage treatment, and aquaculture manure treatment. During the anaerobic digestion process, it is necessary to properly circulate and stir the feed liquid. An effective way to improve the efficiency of anaerobic digesters. The existing anaerobic digesters can be divided into two types: those with external power circulation and stirring and those without external power circulation and stirring. The ones without external power circulation and stirring digesters Disadvantages: The reactor is bulky, high in capital investment, covers a large area, long production cycle, low e...

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Problems solved by technology

[0003] At present, anaerobic digesters are used in many aspects such as bioenergy production, municipal garbage, sewage treatment, and aquaculture manure treatment. During the anaerobic digestion process, it is necessary to properly circulate and stir the feed liquid. An effective way to improve the efficiency of anaerobic digesters. The existing anaerobic digesters can be divided into two types: those with external power circulation and stirring and those without external power circulation and stirring. The ones without external power circulation and stirring digesters Disadvantages: The reactor is bulky, high in capital investment, covers a large area, long production cycle, low efficiency, and the disadvantages of the IC internal circulation reactor: it is not suitable for feed liquid with high suspended solids content, which is not conducive to heat preservation, and is not applicable small business

There are disadvantages of external power circulation and stirring reactor: large investment in motors and water pumps, high production electricity and maintenance costs, and poor comprehensive benefits. Taking the most efficient fluidized bed and expanded bed as an example, because the production process needs to be driven by a motor The water pump circulates the material and liquid, which makes the production energy consumption too high to be used in actual production

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