A device for producing biogas by continuous solid-state fermentation

Abstract

The invention discloses a device for continuously producing biogas by means of solid-state fermentation, and belongs to the field of anaerobic treatment technologies for organic waste. The device comprises a fermentation tank and a biogas collecting tank. A feed inlet is formed in the upper portion of the fermentation tank, a discharge outlet is formed in the lower portion of the fermentation tank, and a stirring shaft is arranged in the middle of the fermentation tank along the axial direction of a tank body. A plurality of support plates are parallelly arranged on the stirring shaft, are perpendicular to the axial direction of the stirring shaft and are used for carrying fermentation materials, and an opening is formed in each support plate, so that the fermentation materials can be transferred on different layers of support plates. Scraper blades are arranged on the stirring shaft, are perpendicular to planes of the support plates and can rotate on the planes of the support plates along with the stirring shaft, and a first biogas outlet is formed in the top of the fermentation tank and is connected with the biogas collecting tank by a pipeline, so that the biogas can be collected. The device has the advantages that the fermentation materials can be continuously fermented by the device for a long time, stirring power can be effectively reduced, and accordingly the economical efficiency of the integral reaction device can be improved.

Description

technical field [0001] The invention relates to a device for producing biogas by continuous solid-state fermentation, which belongs to the technical field of anaerobic treatment of organic waste. Background technique [0002] With the depletion of fossil energy and the deterioration of air quality caused by the extensive use of fossil energy, the development of renewable clean energy and the realization of energy substitution have become an important strategy for the energy development of the Chinese government. Among them, biogas has been identified as one of the key products for the development of renewable energy in my country. Using environmental organic waste as a substrate and converting it into biogas through anaerobic digestion technology can significantly reduce environmental pollution, improve environmental quality, and provide a large amount of renewable and clean energy. It is currently the most effective and promising way to treat environmental organic waste. O...

AI Technical Summary

Problems solved by technology

[0004] At present, mature solid-state fermentation biogas production equipment and technology are mainly monopolized by European countries, and most of the processes used are batch processes, which are not conducive to continuous and stable industrial production

In addition, it is necessary to use air to blow off the biogas involved in the system during the intermittent feeding and discharging operation, which brings about the hidden danger of air pollution

Images