Straw Biogas High Concentration Vertical Fermentation Tank

Abstract

The invention discloses a high-concentration vertical fermentation tank for straw methane, comprising a methane pot, a feeding port, a discharging port, a gas guide pipe, an exhaust pipe and a horizontal mixer; a U-shaped feeding pipe is installed at the top of the methane tank; one port is upwards set in the top middle of the methane tank and the other end passes through the tank from the side wall of the methane tank; a spiral feeder is installed in the feeding end of the U-shaped feeding pipe; a scaffold plate is set between the U-shaped feeding pipe and the horizontal mixer; a biogas slurry pool is set beside the methane tank; one end of the U-shaped connection pipe is connected with the bottom of the methane tank and the other end is connected with the bottom of the biogas slurry pool. With high volume utilization ratio, the device can improve the fermentation concentration and reduce the operation cost, construction cost and mechanical energy consumption; the intermittent drying fermentation is changed to continuous drying fermentation to ensure that the straw can be quickly and completely decomposed at the upper part of the methane pool, and the output quantity of biogas residue is greatly reduced.

Description

technical field [0001] The invention relates to a straw biogas fermentation device. technical background [0002] At present, several biogas fermentation devices commonly used are CSTR, UASB, USR, HCPF, vertical cylindrical tank horizontal stirring biogas fermentation device and garage door type. CSTR is a cylindrical vertical upflow high-concentration biogas fermentation process, and the cost is relatively cheap. , but the concentration of this process should not be too high, because it relies on the sewage pump to feed, and there is no large agitator, which limits the increase of its concentration, and the highest can only reach 8%; UASB and USR two processes are also Vertical cylinder, although the cost is cheap, but the concentration is lower, so that the operating costs of these three types are relatively high; The process cost is relatively cheap, it is more suitable for straw biogas, the feed concentration is high, the operating cost is low, and the tank capacity can...

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Problems solved by technology

[0002] At present, several biogas fermentation devices commonly used are CSTR, UASB, USR, HCPF, vertical cylindrical tank horizontal stirring biogas fermentation device and garage door type. CSTR is a cylindrical vertical upflow high-concentration biogas fermentation process, and the cost is relatively cheap. , but the concentration of this process should not be too high, because it relies on the sewage pump to feed, and there is no large agitator, which limits the increase of its concentration, and the highest can only reach 8%; UASB and USR two processes are also Vertical cylinder, although the cost is cheap, but the concentration is lower, so that the operating costs of these three types are relatively high; The process cost is relatively cheap, it is more suitable for straw biogas, the feed concentration is high, the operating cost is low, and the tank capacity can be built relatively large, but this process requires large mixing machinery, and the mechanical energy consumption is relatively large; the construction of garage door fermentation tanks Low cost, high fermentation concentration, and low operating cost, but this process fermentation is intermittent and cannot be continuously fermented, and the work efficiency is low

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