Chemical-looping-based carbon-based fuel graded combustion and dry distillation device and method

Abstract

The invention provides a chemical-looping-based carbon-based fuel graded combustion and dry distillation device. The device comprises a fuel reactor, a fast bed air reactor, a bubbling bed air reactorand a tar combustor. The other end of a dry distillation segment I is provided with a delivery pipe. The delivery pipe passes through a fluidized bed fuel reaction segment II and is arranged in a moving bed fuel reaction segment III. The fluidized bed fuel reaction segment II is separated from the moving bed fuel reaction segment III through an air distribution plate. The moving bed fuel reactionsegment III is sequentially connected with the fast bed air reactor, a first cyclone separator and a first return feeder through a pipe, so that a closed loop is formed. The fluidized bed fuel reaction segment II is sequentially connected with a second cyclone separator, the bubbling bed air reactor and a second return feeder through a pipe, so that a closed loop is formed. By means of the chemical-looping-based carbon-based fuel graded combustion and dry distillation device, impurities in coal can be prevented from contaminating a second oxygen carrier; the contact time of gas-solid and solid-solid in the reactors is prolonged; and the conversion rate of carbon-based fuel is increased.

Description

technical field [0001] The invention relates to the field of fuel low-carbon conversion combustion equipment, in particular to a chemical chain-based carbon-based fuel staged combustion and dry distillation device and method. Background technique [0002] Chemical looping combustion technology (Chemical Looping Combustion, CLC) is a CO 2 The new combustion technology with internal separation features can realize CO 2 At the same time, this technology satisfies the principle of energy cascade utilization, which can improve the energy utilization efficiency in the system; in addition, this technology can suppress NO x generation. Therefore, the application of chemical looping combustion technology in the conversion process of fuel is of great help in reducing my country's CO 2 It is of great significance to realize the economical, efficient and clean utilization of fuel. [0003] At present, the basic way to realize the conversion of carbon-based fuels using chemical loopi...

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Problems solved by technology

However, these types of oxygen carriers are less reactive and, therefore, result in lower conversion efficiencies of the final carbon-based fuels

[0005] Thirdly, most of the currently used fluidized bed reactors are fluidized bed reactors. In the fluidized bed reactors, the carbon-based fuel and the oxygen carrier are fully mixed, and some fuels are bound to be in the upper part of the bed. The contact time between the combustible gas and the oxygen carrier is short, and the incomplete conversion will escape the reactor with the flue gas, thus causing the loss of part of the combustible gas

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