Three-stage constant temperature biogas production system

Abstract

The invention provides a production system for three-stage constant temperature marsh gas, which is characterized by comprising a high temperature anaerobic fermentor 1 which is connected with a medium temperature anaerobic fermentor 2 through a second electromagnetic valve 1-2, wherein the medium temperature anaerobic fermentor 2 is connected with a normal and constant temperature anaerobic fermentor 3 through a third electromagnetic valve 1-3, the high temperature anaerobic fermentor 1 and the medium temperature anaerobic fermentor 2 are connected with a heat exchanger 4 through a third valve 4-3 and a second valve 4-2, the normal and constant temperature anaerobic fermentor 3 is connected with the heat exchanger 4 which is connected with the high temperature anaerobic fermentor 1 through a first electromagnetic valve 1-1, the high temperature anaerobic fermentor 1 and the medium temperature anaerobic fermentor 2 as well as the normal and constant temperature anaerobic fermentor 3 are respectively provided with a marsh gas sampling device, a temperature sensor and a pressure sensor, and the high temperature anaerobic fermentor 1 and the medium temperature anaerobic fermentor 2 as well as the normal and constant temperature anaerobic fermentor 3 are respectively communicated with a first valve 4-1. The production system for the three-stage constant temperature marsh gas realizes the step utilization of the energy of hot water, large gas production rate and stable gas production.

Description

technical field [0001] The invention relates to the technical field of utilization of renewable energy such as solar thermal energy and biomass energy, in particular to a three-stage constant temperature biogas production system. Background technique [0002] Biogas is a high-quality, high-efficiency, green and environmentally friendly fuel, and has a very broad prospect of replacing traditional energy sources. In addition to being directly burned for cooking, drying agricultural and sideline products, heating, lighting, and gas welding, biogas can also be used as fuel for internal combustion engines and for the production of chemical raw materials such as methanol, formalin, and carbon tetrachloride. The feed liquid and sediment discharged from the biogas plant after fermentation contain rich nutrients and can be used as fertilizer and feed. [0003] However, at present, the biogas systems commonly used in rural areas in my country are mostly natural fermentation at room t...

AI Technical Summary

Problems solved by technology

[0012] The above-mentioned patents provide a method or system device for constant temperature anaerobic fermentation of biomass from different angles, but none of the methods make full use of the anaerobic fermentation of biomass. The characteristics of the biogas peak point integrate the three-stage anaerobic fermentation of high temperature, medium temperature, and normal temperature and constant temperature into one, and realize the comprehensive cascade utilization of energy while ensuring the smooth progress of the three-stage constant temperature anaerobic fermentation

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