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A chemical looping combustion oxygen carrier and its application method

A technology of chemical chain combustion and application method is applied in the field of sintering and returning ore as an oxygen carrier for chemical chain combustion, which can solve problems such as inability to enter the furnace, and achieve the effects of low price, broad application prospects and abundant inventory.

Active Publication Date: 2018-04-06
GUIZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some fine powder will be produced during the sintering process, which cannot be put into the furnace because it is not conducive to the subsequent smelting process

Method used

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  • A chemical looping combustion oxygen carrier and its application method
  • A chemical looping combustion oxygen carrier and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1) Screen the sintered ore to obtain an oxygen carrier with a particle size of 10 μm-500 μm, which is designated as oxygen carrier I, and its active component is α-Fe 2 o 3 , its mass percentage content is 75%; the mass percentage content of inert components is CaO: 10%, Al 2 o 3 : 2% and SiO 2 : 10%, the rest are impurities;

[0018] 2) Spread 300 mg of the oxygen carrier I obtained in step 1) on the bottom of the fixed-bed reactor (quartz tube). In a nitrogen atmosphere, the sample was heated to 800 °C; then, the nitrogen was switched to a reducing atmosphere (10% CH 4 ,90%N 2 ) carry out a reduction experiment on the sample, and the constant temperature lasts for 20 minutes; then stop the heat preservation, switch the reducing gas to nitrogen, and cool the sample under a nitrogen environment to obtain the oxygen carrier II;

[0019] 3) Spread 300 mg of the oxygen carrier I obtained in step 1) on the bottom of the fixed-bed reactor (quartz tube). In a nitrogen ...

Embodiment 2

[0026] 1) Screen the sintered ore to obtain an oxygen carrier with a particle size of 10 μm-500 μm, which is designated as oxygen carrier I, and its active component is α-Fe 2 o 3 , its mass percentage content is 80%; the mass percentage content of inert components is CaO: 10%, Al 2 o 3 : 2% and SiO 2 : 8%, the rest are impurities;

[0027] 2) Spread 300 mg of the oxygen carrier I obtained in step 1) on the bottom of the fixed-bed reactor (quartz tube). In a nitrogen atmosphere, the sample was heated to 750 °C; then, the nitrogen was switched to a reducing atmosphere (10% CH 4 ,90%N 2 ) carry out the reduction experiment on the sample, and the constant temperature lasts for 20 minutes; then the reducing gas is switched to nitrogen, and the quartz tube is purged for 5 minutes to remove the remaining reducing gas; then, the gas is switched to air, and the reduced sample is Oxidation, constant temperature ventilation for 20 minutes; then switch to nitrogen, purging for 5 mi...

Embodiment 3

[0036] 1) Sieve the sintered ore to obtain an oxygen carrier with a particle size of 10 μm-500 μm, which is designated as oxygen carrier I;

[0037] 2) Spread 300 mg of the oxygen carrier I obtained in step 1) on the bottom of the fixed-bed reactor (quartz tube). In a nitrogen atmosphere, the samples were heated to 700, 750, 800, 850, and 900 °C; then, the nitrogen was switched to a reducing atmosphere (10% CH 4 ,90%N 2 ) carry out the reduction experiment on the sample, and the constant temperature lasts for 20 minutes; then the reducing gas is switched to nitrogen, and the quartz tube is purged for 5 minutes to remove the remaining reducing gas; then, the gas is switched to air, and the reduced sample is Oxidation, constant temperature ventilation for 20 minutes; then switch to nitrogen, purging for 5 minutes, then switch to reducing gas, a new cycle begins; after 10 cycles respectively, stop the heat preservation, switch the reducing gas to nitrogen, and make the sample C...

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Abstract

The invention discloses a chemical looping combustion oxygen carrier, which is characterized in that the chemical looping combustion oxygen carrier is sintering return mine comprising an active component being alpha-Fe2O3 with the mass percent of 60 to 80 percent, and inert components comprising the following ingredients in mass percent: 10 to 15 percent of CaO, 0 to 2 percent of Al2O3, 5 to 15 percent of SiO2, and the balance of impurities. The oxygen carrier (sintering return mine) in the invention has favorable reactivity and mechanical property, is sintered ore which is not sinter molded at a sintering workshop section in the metallurgical industry, and can be applied in a chemical looping combustion system for realizing resource recovery and recycle; according to a method, the sintering return mine in the metallurgical industry is used as the oxygen carrier in the chemical looping combustion system, has favorable reactivity and mechanical property, and is low in cost, rich in inventory, and beneficial to be applied in actual industrial production.

Description

technical field [0001] The present invention belongs to the field of resource environmental protection, and in particular relates to an application method of sintering and returning ore as an oxygen carrier for chemical looping combustion. Background technique [0002] Fossil fuels are cheap and plentiful, and are considered the main source of energy for human activities. It is estimated that by 2030, the electricity generated by the combustion of fossil fuels will increase to 450 GW, of which only 6 GW will be replaced by other energy sources. The main hazard of coal combustion is air pollution; these pollutants have been widely concerned and regulated in China and even the world, among which the amount of carbon dioxide produced by the combustion of fossil fuels is quite large. Out of moral and economic needs, President Obama reiterated in 2013 the serious problem of controlling carbon dioxide emissions from coal-fired power plants to curb global warming. [0003] In ord...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/94C10L10/00F27D17/00F23C10/00
CPCC10L10/00Y02E20/34Y02P10/143
Inventor 刘浪唐安江郭俊江肖志友马先果陈煜汪泽
Owner GUIZHOU INST OF TECH
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