Seal valve material returning system for chemical loop combustion system

Abstract

The invention discloses a seal valve material returning system for a chemical loop combustion system. The middle lower part of the inner surface of the rear wall, which is opposite to a partition plate, of a moving bed is inclined towards the partition plate at an inclination angle of 30-60 degrees; a plurality of air outlet holes are formed in an air distribution plate of a fluidized bed on the left side of the partition plate; umbrella-shaped air caps are mounted on the air outlet holes; a moving bed on the right side of the partition plate is provided with an inclined air distribution plate; an adjustment air pipe is arranged at a position, which is close to an inclined plate, on the rear wall, which is opposite to the partition plate, of the moving plate and can supply intermittent swinging type lateral blowing air; the effective area of the moving bed of the whole device is smaller than that of the fluidized bed. The material returning device can avoid the phenomenon that material running is stopped, thereby avoiding the condition that gas in an air reactor backwards enters a fuel reactor; the controllability of the material throughput is improved, and the stability and reliability of running are improved; furthermore, the seal valve material returning system is simple in structure and convenient to manufacture. The seal valve material returning system is suitable for a loopseal system in the conventional chemical loop combustion reaction device, and lays a foundation for the research on a chemical loop combustion technology.

Description

technical field [0001] The invention relates to a sealing valve return material system in a chemical chain combustion system. Background technique [0002] The problem of global warming caused by greenhouse gas emissions is attracting people's attention. CO 2 As the most important greenhouse gas, the study of CO 2 Emission reduction technologies are imminent. CO in flue gas 2 Often diluted with large amounts of nitrogen, CO 2 The cost of separation and recovery is very high. High concentrations of CO are produced during combustion 2 or facilitate CO 2 It is an effective way to separate the gas phase mixture while eliminating the generation and emission of other pollutants. Chemical-Looping Combustion (CLC for short) is a new type of combustion with the above-mentioned characteristics, and has received more attention. The chemical looping combustion technology was first proposed by Ritcher et al. in 1983. The basic principle is to decompose the traditional fuel-air d...

AI Technical Summary

Problems solved by technology

They cannot realize the artificial control of the flow rate of the material. The air chambers at the lower part of the air distribution plate are very large, which provide air volume for both the loosening air chamber and the fluidization air chamber. The air distribution plates corresponding to the moving bed and the fluidized bed are all opened hole, the air volume is the same as or not much different from the air distribution method

Practice has shown that this kind of return device will have problems such as stagnation, fluidization dead angle, and poor material circulation during operation, resulting in unstable operation.

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