Double-chamber anaerobic methane secondary fermentation device

Abstract

The invention relates to a double-chamber anaerobic methane secondary fermentation device. The double-chamber anaerobic methane secondary fermentation device consists of a primary fermentation chamber and a secondary fermentation chamber, wherein the primary fermentation chamber is provided with a feed port; a stirrer is arranged in the primary fermentation chamber; the secondary fermentation chamber is arranged in the primary fermentation chamber; a water layer is arranged between the primary fermentation chamber and the secondary fermentation chamber; the secondary fermentation chamber is covered by a gas storage cover; a counter weight block is arranged at the bottom of the gas storage cover and is placed into the water layer, so that a constant pressure gas storage chamber is formed on the upper part of the gas storage cover; and a slag outlet pipe, a gas storage pipe and a liquid outlet pipe are arranged in the secondary fermentation chamber. The double-chamber anaerobic methane secondary fermentation device has the advantages that: 1. the device has a compact structure and small occupied area, can reduce construction cost by 30 percent, and is convenient to operate, manage and maintain; 2, the device is safe and reliable in use and has low operating cost; 3, the digestibility of raw materials can reach 85 percent and gas yield is increased by 30 percent; and 4, the temperature of the whole fermentation device can be increased, the fermentation is performed completely, and the temperature can be maintained, so that normal gas production rate in winter can be guaranteed.

Description

Technical field: [0001] The invention belongs to a biogas device, in particular to a double-chamber anaerobic biogas secondary fermentation device. Background technique: [0002] As a renewable energy source, biogas is not only clean, cheap, and hygienic, but also gradually shows its unique advantages in many aspects such as agricultural development, environmental protection, and comprehensive utilization, and has been highly valued by the country and the people. But the existing biogas device has the following defects: 1. Most of the existing biogas projects adopt the split method, and the distance between the anaerobic digester (biogas reaction tank) and the gas storage cabinet should reach two gas chambers at a certain distance, so there will be A large number of pipelines are connected in reverse, which is labor-intensive and material-intensive. Because the pipeline connection requires high technology, it is prone to leakage, high heat loss, large floor area, and inconve...

AI Technical Summary

Problems solved by technology

But the existing biogas device has the following defects: 1. Most of the existing biogas projects adopt the split method, and the distance between the anaerobic digester (biogas reaction tank) and the gas storage cabinet should reach two gas chambers at a certain distance, so there will be A large number of pipelines are connected in reverse, which is labor-intensive and material-intensive. Because the pipeline connection requires high technology, it is prone to leakage, high heat loss, large floor area, and inconvenient operation, management and maintenance. inconvenient

2. Low gas production

Because the digestion index of the material in the existing biogas fermentation process is only 50%-60%, the main reason is that the raw material→semi-raw material→clinker→clinker control of the material in the anaerobic digester is not good, resulting in about 40% Undigested raw meal is discharged, thus limiting the improvement of biogas fermentation level

3. Because the project covers a large area and the buildings are scattered, the insulation effect is poor, and the gas production rate is low in winter

4. Due to the overall structure of concrete pouring, the construction efficiency is low, and industrialized large-scale manufacturing cannot be carried out, which seriously restricts the popularization and promotion of biogas

[0003] Although the Chinese patent "Large Conjoined Biogas Fermentation Tank Device" (ZL2008200746341) solves the above problems, since the raw materials are only fermented once, the raw materials cannot be fully utilized, and there will still be a certain amount of organic matter that has not been fully digested from the exhaust. liquid discharge

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