Household garbage coupling fluidized bed hierarchical pyrolytic gasifier

Abstract

The invention provides household garbage coupling fluidized bed hierarchical pyrolytic gasifier, comprising a deferrization pulverizer, a tubular cylinder drying machine, a coupling fluidized bed, a gas distributor, an ash discharge tube, an air intake pipe, a material-feeding port, a first-stage gas-solid separator, a coarse ash cycle refeed pipe, a refeeder, a second-stage gas-solid separator, a fine ash cycle refeed pipe, an entrained-flow bed and a gas outlet. The deferrization pulverizer and the tubular cylinder drying machine are disposed at the front end of the coupling fluidized bed; the gas distributor and the ash discharge tube are disposed at the bottom of the coupling fluidized bed; the entrained-flow bed is disposed at a position 1,000-2,000 mm away from the bottom of the coupling fluidized bed; the material-feeding port is disposed at a position 500-3,000 mm away from the bottom of the entrained-flow bed; and the first-stage gas-solid separator and the second-stage gas-solid separator are disposed at the top of the entrained-flow bed; the coarse particle ash cycle refeed pipe of the first-stage gas-solid separator is connected with the bottom of the combined circulating fluidized bed through the refeeder; and the fine particle cycle refeed pipe of the second-stage gas-solid separator is connected with the spiral-flow type entrained flow bed through the refeeder.

Description

1. Technical Field [0001] The invention provides a staged pyrolysis gasifier coupled with a fluidized bed for household garbage, which belongs to the field of environmental protection equipment. 2. Background technology [0002] At present, the treatment methods of municipal waste in various countries in the world mainly include classified recycling, landfill, composting and incineration, cracking and gasification. Landfill treatment requires a large amount of land. At the same time, the harmful components in the garbage will also cause serious pollution to the atmosphere, soil and water sources, not only destroying the ecological environment, but also seriously endangering human health. Composting requires sorting and classification of the garbage, which requires a high organic content. Moreover, the compost treatment cannot be reduced, and a large amount of land is still required. [0003] The essence of incineration is to oxidize organic waste into inert gaseous matter and ino...

AI Technical Summary

Problems solved by technology

Its advantages are rapid capacity reduction and complete high-temperature harmlessness. It occupies a small area and has heat recovery. However, due to the presence of oxygen, chlorine-containing organic substances in garbage will inevitably produce highly toxic dioxins that are difficult to decompose. , becoming a bottleneck restricting the application of waste incineration

[0004] Domestic waste pyrolysis is a newly developed technology in recent years. It has a high utilization rate of waste resources and no generation of dioxins. However, the composition of oil products is complex, it is difficult to use, and it produces difficult-to-handle phenol water. In addition, fixed-bed technology is mainly used Difficult to achieve large-scale production; domestic waste gasification has a high utilization rate of waste resources, less dioxin formation, but the gas has a low calorific value, tar needs to be removed, and it is difficult to use. At present, it is difficult to achieve large-scale production with fixed bed technology.

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