Household solid garbage recycling and renewable biological carbon circulating technology

Abstract

The invention discloses household solid garbage recycling and renewable biological carbon circulating technology, which solves the problem that biogas generated from household garbage is difficult to ferment at places with low temperature, and realizes an integral circulating zero-carbon emission system and a large-size renewable biological carbon circulating system simultaneously. The technical scheme includes that pretreated household garbage is fed into a large-size biogas digester to ferment, biogas is supplied for oxygen-enriched combustion of a gas turbine gas to generate power, biogas slurry is used as a biofuel cell substrate and is cleaned and used for power generation, and biogas residue is used as biological organic fertilizer and used for growth of fast-growing trees for biomass fuel power plants. Flue gas generated in combustion in the power plants circulates to guarantee fermenting temperature of the biogas digester so as to realize biogas production stably and efficiently. Pure oxygen and recycled tail gas are used as combustion supporting gas of the power plants, and accordingly combustion efficiency can be improved while cost for treatment of tail gas is reduced. CO2 in the flue gas is captured according to the carbon capture technology, and accordingly the zero-carbon emission system is realized. In addition, the renewable biological carbon cycling system is realized by means of biological treatment to biogas slurry and biogas residue.

Description

technical field [0001] The invention relates to a method for energy utilization of solid domestic waste, and at the same time realizes zero carbon emission in the process of energy utilization of solid domestic waste through a renewable biological carbon cycle method, and belongs to the technical fields of circular economy, renewable energy, energy conservation and emission reduction. Background technique [0002] Household waste pollution has become a global environmental problem. The annual output of domestic waste in China alone reaches hundreds of millions of tons, accounting for 26.5% of the world's total waste production, and is growing at a rate of 8-9% every year. In recent years, with the continuous improvement of the living standards of urban residents, the organic matter content of urban domestic waste has continued to increase. Therefore, the reasonable and effective application of domestic waste is not only conducive to improving the environment, but also a way o...

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Problems solved by technology

[0009] The invention provides a method for energy utilization of solid domestic waste and a renewable bio-carbon circulation method. The purpose is to solve the problem of maintaining a relatively high temperature for solid waste in the winter in the north without using an external heating source to heat the biogas digester. The problem of waste-to-biogas fermentation, while realizing the overall cycle zero-carbon emission system and a large-scale and complete renewable bio-carbon cycle technology system

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