Solar heating backheating type efficient methane generation system

Abstract

The invention provides a solar energy-heated heat return type high-efficiency marsh gas generating system which is characterized by comprising a solar energy heat collecting box 1 which is communicated with a hot water storage box 2 through a first valve 4-0, wherein the hot water storage box 2 is provided with a first temperature sensor 3-0 and is communicated with a high temperature fermentation apparatus 3 through a first electromagnetic valve 1-1, the high temperature fermentation apparatus 3 is connected with a medium temperature anaerobic fermentor 4 which is connected with a normal and constant temperature anaerobic fermentor 5, the high temperature fermenting device 3 and the medium temperature anaerobic fermentor 4 as well as the normal and constant temperature anaerobic fermentor 5 are respectively provided with a marsh gas sampling device, a temperature sensor and a pressure sensor; and the high temperature fermenting device 3 and the medium temperature anaerobic fermentor 4 as well as the normal and constant temperature anaerobic fermentor 5 are connected with a water pump 7 through a valve and a heat exchanger, and the water pump 7 is connected with the solar energy heat collecting box 1. The solar energy-heated heat return type high-efficiency marsh gas generating system effectively utilizes the afterheat heating cooling medium of the solar energy and the system, realizes the comprehensive utilization of energy and generates marsh gas with high efficiency.

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 solar-heated regenerative high-efficiency biogas generation 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 ...

AI Technical Summary

Problems solved by technology

[0011] The above-mentioned patents each provide a constant temperature biogas production method or system device from different angles. However, there is no device system that can simultaneously have the characteristics of a biogas production peak point around 37°C and 53°C based on the anaerobic constant temperature fermentation of biomass. , integrating high-temperature, medium-temperature, and room-temperature three-stage fermentation into one, comprehensively utilizing solar energy, and realizing comprehensive cascade utilization of energy

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