Chemical-looping combustion system of parallel fluidized bed

Abstract

The invention belongs to a chemical-looping combustion system of a parallel fluidized bed in the technical field of clean combustion and efficient use of fuel. A cylinder of the parallel fluidized bed is divided into two cavities by a partition plate, one cavity is of a fuel reactor, and the other cavity is of an air reactor; and a hole a and a hole b are arranged on the partition plate, and materials pass through the hole a and the hole b on the partition plate to carry out the exchange of matter and energy. The system breaks the design idea of the interconnected fluidized bed of the more traditional chemical-looping combustion device, and adopts the concept of the parallel fluidized bed; the partition plate is used for partitioning the air reactor from the fuel reactor, and oxygen carriers are transferred between the two reactors only by the partition plate; the transfer distance and the transfer resistance are reduced, so that the transfer amount of the oxygen carriers can be ensured; and the volume fraction of gas flowing into the air reactor from the fuel reactor is within 5 to 10%, and the conversion rate of the fuel is 95%. The chemical-looping combustion reactor of the parallel fluidized bed is easy to enlarge the scale.

Description

Technical field [0001] The invention belongs to the technical field of clean combustion and efficient utilization of fuel, and particularly relates to a parallel fluidized bed chemical chain combustion system. Background technique [0002] Chemical chaining combustion (CLC) is a new flameless combustion technology. When carbon-containing gas fuels are used, the combustion products only contain CO 2 And H 2 O, high purity CO can be obtained by simple condensation 2 , So as to achieve CO with lower energy consumption 2 Separation. This technology has very high energy efficiency and has broad development prospects. The chemical chain combustion system includes two reactors, namely a fuel reactor and an air reactor. Metal oxides are used as oxygen carriers to circulate in the two reactors to realize the transfer of oxygen and energy. For the chemical chain combustion system, the key issue is how to select the type of reactor. A suitable CLC reactor must meet the following main con...

AI Technical Summary

Problems solved by technology

Although this kind of reactor has a high gas conversion efficiency, due to its structure and working principle, the transfer amount of oxygen carrier is limited, and there is still a long way to go to achieve large-scale operation

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