Method for producing synthesis gas by combustible solid waste chemical chain gasification and interconnected fluidized bed reactor

Abstract

The invention provides a method for producing synthesis gas by combustible solid waste chemical chain gasification and an interconnected fluidized bed reactor. The method is implemented in an interconnected fluidized bed reactor, and the interconnected fluidized bed reactor comprises a fuel reactor and an air reactor communicated with each other internally. The combustible solid waste produces gasification reaction with a carrier of oxygen to produce synthesis gas, and the oxygen element necessary for the gasification of combustible solid waste comes from the lattice oxygen in the carrier component of oxygen; the carrier of oxygen without lattice oxygen is transported to the air reactor, in the air reactor, the carrier of oxygen is re-oxidized by high-temperature air to recovery to lattice oxygen; the carrier of oxygen recovered with lattice oxygen is carried out the air reactor by high-speed air, returns back to the fuel reactor for cycle use and produces gasification reaction with the combustible solid waste again. The invention relates to a high-efficiency combustible solid waste gasification technique breaking the prior art, and the invention can produce high-quality synthesisgas and reduce the contents of tar and carbon deposite during the gasification process.

Description

technical field [0001] The invention relates to the technical field of new energy and renewable energy, in particular to a method for producing synthesis gas by chemical looping gasification of combustible solid waste and a serial fluidized bed reactor. technical background [0002] Due to the decrease of fossil fuels and the environmental pollution caused by the utilization of fossil energy, the research, development and utilization of clean and renewable energy have become an important research topic for energy workers. At present, my country produces 840 million tons of crop straw and 150 million tons of municipal solid waste annually, a considerable proportion of which is combustible solid waste that can be used as energy raw materials. Combustible solid waste, including biomass resources, has the advantages of large resources, renewable, and less environmental pollution. Therefore, the research and development of new and efficient combustible solid waste conversion and ...

AI Technical Summary

Problems solved by technology

In a general fluidized bed gasification reactor, if it is desired to obtain high calorific value or hydrogen-rich synthesis gas, it is necessary to provide oxygen-rich gas or high-temperature steam as a gasification agent, which makes the process more complicated and the cost of gasification increases

In addition, the traditional combustible solid waste gasification process will also produce a large amount of tar, which not only affects the overall gasification efficiency of combustible solid waste, but also causes problems such as blockage and corrosion of the reactor and supporting equipment. These problems also restrict combustible solid waste. Large-scale promotion and utilization of solid waste gasification technology

[0003] At present, although there have been a few reports on the gasification of biomass in a serial fluidized bed, in a serial fluidized bed, metal oxides are used as oxygen carriers to make combustible solid waste gasify through a chemical chain reaction. The process of producing syngas is rarely reported

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