Gas stirring control system and method

Abstract

The invention provides a gas stirring control system and method. The system comprises a fermenting tank, a methane boost system, and a controller; the lower end of the fermenting tank is connected with a plurality of stirring valves used for opening or closing the fermenting tank; the upper end of the methane boost system is connected with the upper end of the fermenting tank through a low pressure line, and the lower end of the methane boost system is connected with a plurality of stirring valves through a high pressure line; the methane boost system is used for boosting gas flowing from the fermenting tank into the methane boost system; the controller is connected between the methane boost system and the plurality of stirring valves and controls one of the stirring valves to open according to the pressure of the gas boosted by the methane boost system. The system provides stirring required pressure, the controller controls opening of the plurality of stirring valves at the bottom of the fermenting tank, and thus materials in the fermenting tank can be evenly stirred.

Description

technical field [0001] The invention relates to a gas agitation control system and method, in particular to a gas agitation control system and method for processing organic waste in the field of urban life. Background technique [0002] At present, the dry anaerobic fermentation process is used to treat municipal solid waste, poultry manure and straw-like organic waste, and obtain renewable energy while processing organic waste. Due to the high concentration of fermented matter, dry anaerobic fermentation has the advantages of high volumetric gas production rate, water saving, and less biogas slurry production. But on the other hand, because of the higher solid content, it will have a significant impact on mass transfer and heat transfer, so a higher stirring system can alleviate the contradiction between high solid content and mass transfer and heat transfer, so that the materials can be mixed Uniform, providing contact between materials and microorganisms, accelerating th...

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Problems solved by technology

[0004] However, how to achieve automatic control (starting conditions, interval time, duration, stirring pressure) of this stirring method is a difficult point. The traditional continuous stirring / timed aeration stirring is not very targeted to deal with the complex state in the fermenter. On the one hand, it is reflected in the fact that the stirring pressure is limited, and the stirring effect will change due to the viscosity and density of the material. In the case of high viscosity and high density, the stirring effect will become worse; on the other hand, because the stirring gas flow direction is fixed and cannot Radiation to the entire fermentation tank, so there is a blind area at the bottom of the fermentation tank wall. With the increase of running time, heavy materials such as sand and stone in the blind area will slowly accumulate to form sediments, and the mixing effect will gradually deteriorate and the mixing efficiency will be low. , not only causes waste of electrical energy of the equipment, but also affects the biochemical environment in the anaerobic fermentation tank

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