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

A fuel grading and chemical chain technology, applied in combustion methods, fuels burned in a molten state, fluidized bed combustion equipment, etc. The effect of increasing carbon loss, increasing conversion, and prolonging contact time

Pending Publication Date: 2018-09-04
JIANGSU UNIV
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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 th

Method used

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

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[0052] Example: Illinois coal as a carbon-based fuel, iron ore as the first oxygen carrier, and pure NiO particles as the second oxygen carrier are used in the present invention. The industrial analysis and elemental analysis data of the coal are shown in Table 1. As shown, the composition analysis of iron ore is shown in Table 2.

[0053] In this example, the reaction temperature in the fast bed air reactor 7 is 950°C, and the temperatures of the dry distillation section I, fluidized bed fuel reaction section II and moving bed fuel reaction section III of the fuel reactor are 600°C, 900°C and 900°C. The moving bed fuel reaction section uses iron ore to contact coke, and the fluidized bed fuel reaction section II uses NiO as the second oxygen carrier. There is no direct contact between coke and NiO, so the impurities in carbon-based fuels, especially ash, have no effect on NiO; the residence time of coke decomposed after carbonization of coal in the moving bed fuel reaction sect...

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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...

Claims

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Application Information

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IPC IPC(8): F23C10/04F23C10/24
CPCF23C10/04F23C10/24
Inventor 罗明王超杜敏王助良易旸
Owner JIANGSU UNIV
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