Resourceful treatment system adopting straw to produce biogas and having efficient desulphurization and decarbonization functions

Abstract

The invention discloses a resourceful treatment system adopting straw to produce biogas and having efficient desulphurization and decarbonization functions. The system comprises a straw storage bin, a rapid degradation tank, a hydrolysis tank, an independent heat exchanger, an integrated CSTR (continuous stirred tank reactor), a biogas purification device, a foliar fertilizer bin, a temporary biogas slurry storage pool, a solid-liquid separator and an organic fertilizer bin; the biogas purification device comprises a desulphurization device, a decarbonization device, a dehydration device, a compressor, a gas storage tank, pipelines and valves; the desulphurization device adopts an alkaline solution spraying method to remove H2S in the biogas, the biogas and an alkaline solution are dispersed respectively through a uniform gas distributor and a uniform liquid distributor, and H2S gas in the biogas sufficiently reacts with the alkaline solution through two stages of reaction plates; by means of the decarbonization device, CO2 gas can be effectively and sufficiently contacted with the alkaline solution, meanwhile, a novel alkaline solution is supplied in real time by the aid of sensors and electronic control valves, so that the concentration of the alkaline solution is guaranteed, and the continuous higher decarbonization efficiency is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of biogas treatment equipment, and particularly relates to a straw-produced biogas resource treatment system with high-efficiency desulfurization and decarbonization functions. Background technique [0002] Since the 1970s, with the impact of the global oil crisis and the improvement of environmental protection awareness, countries around the world have paid more and more attention to the development and efficient conversion of biomass energy, and have formulated development research plans. The energy farms in the United States, the Sunshine Project in Japan, the Green Energy Project in India and the Alcohol Energy Project in Brazil are all special supports for biomass research and development. Material Engineering" major project. At present, biomass energy utilization accounts for 14% of the world's total energy, equivalent to 1.257 billion tons of oil. According to the United Nations Environment Programm...

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Problems solved by technology

In the use of alkaline solution method to remove H 2 process of S, alkaline solution and H 2 The S reaction will reduce the concentration of the alkaline solution, thereby reducing the absorption efficiency; in the industry, the alkaline solution method is used to remove H 2 S, one is to directly pass the gas into the alkaline solution, and the other is to use the method of spraying. The former method wastes the alkaline solution, and the common problem of the latter method is that the spray mist and H 2 S gas cannot be fully contacted effectively, resulting in low desulfurization rate

[0007] In the use of alkaline solution method to remove CO 2 In the process, the gas is usually directly passed into the alkaline solution, and there is CO 2 The gas cannot be fully contacted with the alkaline solution effectively, resulting in a low desulfurization rate; at the same time, the alkaline solution and CO 2 The reaction will reduce the concentration of the alkaline solution, thereby reducing the absorption efficiency

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