Process and device for preparing natural gas from household garbage

Abstract

The invention relates to the field of garbage treatment, in particular to a process and a device for preparing natural gas from household garbage. After household garbage is sorted, crushed and pretreated, inorganic garbage is reacted to generate H2 and CO through a multi-gun gasification furnace (6) for preparing H2 and a multi-gun catalyst furnace (19) for preparing CO, H2 and CO are reacted to generate methane, organic garbage is purified and separated through the fermenting tank (48). The process and the device have the benefits that main smoke pollutants realize near zero emission; during the process of capturing CO2 under the smoke closed circulation state, the main smoke pollutants realize near zero emission; the process and the device are used for producing high-additive natural gas and carbon black products, the economic benefits are remarkably increased, and the process and the device are suitable for large-scale household garbage treatment, and the actuat daily capacity is 3,000-30,000 tons.

Description

technical field [0001] The invention relates to the field of garbage treatment, in particular to a process and device for producing natural gas from domestic garbage. Background technique [0002] With the rapid development of urbanization in China, the phenomenon of garbage siege is becoming more and more serious. At the same time, with the further deepening of China's air pollution and PM2.5 prevention and control actions, simple incineration of municipal solid waste for power generation will be eliminated. [0003] The main defects of the current simple incineration technology of domestic waste for power generation: First, the impact of pollutants such as dioxins (including chlorides), nitrogen oxides, sulfur oxides, dust, odor, and other harmful organic gases on the surrounding environment, It causes panic among residents in nearby areas that is difficult to get rid of, resulting in resistance, making it difficult to select a site for waste incineration power generation...

AI Technical Summary

Problems solved by technology

[0003] The main defects of the current simple incineration technology of domestic waste for power generation: First, the impact of pollutants such as dioxins (including chlorides), nitrogen oxides, sulfur oxides, dust, odor, and other harmful organic gases on the surrounding environment, It causes panic among residents in nearby areas that is difficult to get rid of, resulting in resistance, making it difficult to select a site for waste incineration power generation projects; second, the investment in equipment is large, and the economic benefits are poor, and expenditures and profits are maintained by waste disposal fees; third, the scale is small and cannot adapt to large-scale projects. Reduction and recycling of domestic waste in medium-sized cities

For example, the maximum daily processing capacity of a single unit of plasma domestic waste gasification treatment equipment in the United States, Japan, Canada, etc. can only process 110 tons, and the cost is high.

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