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Method and device for burning chemistry chains based on iron or iron oxide

A technology of chemical chain combustion and iron oxide, which is applied in the direction of using non-combustion exothermic chemical reaction to generate heat, heating device, exothermic chemical reaction heat generation, etc., can solve the problems of wasting fuel gas and reducing purity, and achieve reduction Energy waste, improved purity, and easy capture effects

Inactive Publication Date: 2010-03-17
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The contradiction in this process is that if the oxygen carrier is expected to obtain a larger oxygen carrying capacity, that is, the oxygen carrier is reduced and more oxygen atoms are taken away, the Fe 2 o 3 It needs to be reduced to FeO or Fe, and the reduction to FeO or Fe must involve Fe 3 o 4 The process of converting into FeO or Fe, and this process, as mentioned above, will inevitably lead to the exhaust gas containing unreacted fuel gas, reducing the CO in the exhaust gas 2 purity
It also wastes a lot of fuel gas

Method used

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  • Method and device for burning chemistry chains based on iron or iron oxide
  • Method and device for burning chemistry chains based on iron or iron oxide
  • Method and device for burning chemistry chains based on iron or iron oxide

Examples

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Effect test

Embodiment 1

[0043] A method of chemical chain combustion based on iron or iron oxides using coal as fuel, placing iron or iron oxides in the fluidized bed 1 of the air reactor, and feeding fluidized air at the lower end C of the fluidized bed 1 of the air reactor , the operating temperature of the air reactor fluidized bed 1 can be controlled at about 800 ° C ~ 1250 ° C, iron or iron oxides react with oxygen in the air to obtain Fe 2 o 3 , and then the gas-solid two-phase is separated by the air separator 1-4; the separated high-temperature oxygen-poor air is discharged from the upper end E of the air separator 1-4, and is used for power generation or waste heat utilization; the separated Fe 2 o 3 Enter the fuel reactor fluidized bed 3 through the first overflow tank 2; the operating temperature of the fuel reactor fluidized bed 3 can be controlled at about 800 ° C ~ 1200 ° C; enter the fuel reactor riser 3 from the first overflow tank 2 Fe at the bottom of -2 2 o 3 Utilize the entrai...

Embodiment 2

[0045] A method of chemical looping combustion based on iron or iron oxides using natural gas as fuel, placing iron or iron oxides in the fluidized bed 1 of the air reactor, and feeding fluidized air at the lower end C of the fluidized bed 1 of the air reactor , the operating temperature of the air reactor fluidized bed 1 can be controlled at about 800 ° C ~ 1250 ° C, iron or iron oxides react with oxygen in the air to obtain Fe 2 o 3 , and then the gas-solid two-phase is separated by the air separator 1-4; the separated high-temperature oxygen-poor air is discharged from the upper end E of the air separator 1-4, and is used for power generation or waste heat utilization; the separated Fe 2 o 3 Enter the fuel reactor fluidized bed 3 through the first overflow tank 2; the operating temperature of the fuel reactor fluidized bed 3 can be controlled at about 800 ° C ~ 1200 ° C; The lower end A of the natural gas is passed into the natural gas, and enters the Fe at the bottom of ...

Embodiment 3

[0047]A device for realizing the method for chemical looping combustion of iron or iron oxides described in claim 1, comprising an air reactor fluidized bed 1, a first overflow tank 2, a fuel reactor fluidized bed 3 and a second The overflow tank is composed of 4. Air reactor fluidized bed 1 is composed of main reaction chamber 1-1, air reactor transition section 1-2, air reactor riser 1-3 and oxygen-poor air separator 1-4, air reactor riser 1 The lower end of -3 is connected with the main reaction chamber 1-1 through the air reactor transition section 1-2, and the upper end of the air reactor riser 1-3 is connected with the oxygen-poor air separator 1-4; the fuel reactor fluidized bed 3 It is composed of carbon dioxide separator 3-1, fuel reactor riser 3-2, return tank 3-3, fuel reactor transition section 3-4, mixed gasification reaction chamber 3-5 and screw feeder 3-6 , the lower end of the fuel reactor riser 3-2 is connected to the mixed gasification reaction chamber 3-5 ...

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Abstract

The invention discloses a method and a device for burning chemistry chains based on iron or iron oxide, and the method comprises the following steps: placing iron or iron oxide in an air reactor fluidized bed; introducing fluidized air; obtaining Fe2O3 by reacting iron or iron oxide with oxygen in the introduced air; separating gas phase from solid phase by a separator; discharging the separated high-temperature oxygen-poor air from the top end of the separator; feeding the separated Fe2O3 in a fuel reactor fluidized bed via an overflow groove; feeding solid fuel in the fuel reactor fluidizedbed via a spiral feeder; generating synthesis gas by a gasification reaction in which the solid fuel reacts with the water vapour introduced from the bottom end of the fuel reactor; carrying out reduction reaction by reacting the synthesis gas or fuel with oxygen released by Fe2O3 to generate carbon dioxide; reducing Fe2O3 to FeO or Fe; returning to an air reactor fluidized bed via an overflow groove for further oxidation; and realizing cyclic usage. If gas fuel is used, the gas fuel is directly introduced in the fuel reactor.

Description

technical field [0001] The invention relates to a method and device utilizing chemical looping combustion, in particular to a method and device based on iron or iron oxide chemical looping combustion. 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 loop combustion is a new type of combustion with the above characteristics. The basic principle is to decompose the traditional fuel-air direct contact reaction combustion into two gas-solid reactions with the help ...

Claims

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Application Information

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IPC IPC(8): F24J1/00F24V30/00
Inventor 向文国薛志鹏王新
Owner SOUTHEAST UNIV
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