Dual-cycle fluidized bed device for coal-based chemical chain process

Abstract

The invention belongs to the technical field of coal utilization, and relates to a dual-cycle fluidized bed device for a coal-based chemical chain process. Coal ash obtained after reaction at a high temperature, a reduced oxygen carrier and a generated gas are separated by a cyclone separator; pure CO2 or synthetic gas is obtained by cooling the gas; the reduced oxygen carrier obtained by the cyclone separator enters a material storage device; the reduced oxygen carrier enters an oxygen reactor by adjustment of a control valve; the reduced oxygen carrier and air react at the high temperature in the oxygen reactor to prepare an oxidized oxygen carrier; the oxidized oxygen carrier is separated by the cyclone separator and fed into the material storage device; the oxidized oxygen carrier is fed into a reduction reactor through a helical feeder by the control valve; the burning of coal or preparation of the synthetic gas from the coal is finished by repeatedly circulating the steps; and the device has a novel and simple structure, good reaction effect and high gas yield, is convenient to operate and use and saves energy.

Description

Technical field: [0001] The invention belongs to the technical field of equipment for clean and efficient utilization of coal, and relates to a double-cycle annulus fluidized bed device for a coal-based chemical chain process, which is suitable for preparing synthesis gas or burning in the chemical chain process of coal and other solid fuels. Background technique: [0002] Chemical-Looping technology (Chemical-Looping technology) puts forward a new idea for the clean and efficient utilization of energy. This technology can achieve CO2 without consuming additional energy. 2 internal separation; it can realize cascaded utilization of energy and improve the total thermal efficiency of the system; at the same time, it can also control thermal and fuel NO x generate. Therefore, chemical chain technology is one of the key technologies to solve energy utilization and environmental problems. The principle of chemical chain technology is to use chemical media (solid particles) to d...

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Problems solved by technology

At present, the traditional chemical looping combustion reactor is generally a double circulating fluidized bed reactor, which is mainly composed of a reduction reactor composed of a low-speed bubbling fluidized bed and an oxidation reactor composed of a fast fluidized bed. These reactors are generally The flow of the circulating material is controlled and adjusted through the cyclone separator and the flow sealing valve. The existing reactors generally have the complicated operation of the flow sealing valve, the structure principle and the process are cumbersome, the degree of control automation is not high, and the heat between the reactors Disadvantages such as low transmission utilization rate and poor energy saving effect

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