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A method for preparing chemical looping combustion oxygen carrier by using blast furnace slag

A technology of chemical looping combustion and oxygen carrier, which is applied in the direction of fuel, fuel additives, petroleum industry, etc. It can solve the problems of burst surface sintering, low oxygen carrier rate of oxygen carrier, etc., achieve low cost, simple preparation steps, and prolong service life Effect

Active Publication Date: 2018-09-14
嘉兴沃特泰科环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the problems that the traditional iron-based oxide oxygen carrier has a low oxygen-carrying rate, bursting and surface sintering will occur in the case of excessive reduction, the present invention first pulverizes the blast furnace slag, Stir, mix and filter the water, dry the filter residue, mix and grind with fatty alcohol polyoxyethylene ether and calcinate to obtain the chemical chain combustion oxygen carrier matrix, and then stir and mix coconut oil fatty acid diethanolamide and ferric nitrate solution , after adding citric acid and stirring, adding the chemical looping combustion oxygen carrier matrix and sodium borohydride for ultrasonic vibration and filtering, and calcining the filter residue to obtain the chemical looping combustion oxygen carrier

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] First, take the blast furnace slag and put it into a pulverizer for crushing, pass through a 100-mesh sieve, collect the sieved particles, put the sieved particles and water into the mixer at a mass ratio of 1:2, stir at 200r / min for 15 minutes, and then let it stand for 30 minutes , remove floating impurities, then filter, collect the filter residue, put the filter residue in a drying oven at 90° C. for 9 hours, and collect the dried filter residue; combine the above-mentioned dried filter residue with 6% fatty alcohol Put the polyoxyethylene ether into the vertical mill, set the speed at 120r / min, grind for 6 hours, then put the ground material in the vertical mill into the calciner, set the temperature at 400°C, calcined for 3 hours, then The furnace is cooled to room temperature, and the calcined product is collected to obtain a chemical looping combustion oxygen carrier substrate for subsequent use; according to a mass ratio of 1:6, take coconut oil fatty acid dieth...

example 2

[0020]First, take the blast furnace slag and put it into a pulverizer for crushing, pass through a 100-mesh sieve, collect the sieved particles, put the sieved particles and water into the mixer at a mass ratio of 1:2, stir at 200r / min for 10 minutes, and then let it stand for 20 minutes , remove floating impurities, then filter, collect the filter residue, put the filter residue in a drying oven at 90°C for 7 hours, and collect the dried filter residue; combine the above-mentioned dried filter residue with 3% fatty alcohol by weight of the above-mentioned dried filter residue Put the polyoxyethylene ether into the vertical mill, set the speed at 120r / min, grind for 4 hours, then put the ground material in the vertical mill into the calciner, set the temperature at 300°C, calcined for 2 hours, then The furnace is cooled to room temperature, and the calcined product is collected to obtain a chemical looping combustion oxygen carrier substrate for subsequent use; according to a m...

example 3

[0023] First, take the blast furnace slag and put it into a pulverizer for crushing, pass through a 100-mesh sieve, collect the sieved particles, put the sieved particles and water into the mixer at a mass ratio of 1:2, stir at 200r / min for 12 minutes, and then let it stand for 25 minutes , remove floating impurities, then filter, collect the filter residue, put the filter residue in a drying oven at 90°C for 8 hours, and collect the dried filter residue; combine the above dried filter residue with 5% fatty alcohol Put the polyoxyethylene ether into the vertical mill, set the speed at 120r / min, and grind for 5 hours, then put the ground material in the vertical mill into the calciner, set the temperature at 350°C, calcined for 3 hours, then The furnace is cooled to room temperature, and the calcined product is collected to obtain a chemical looping combustion oxygen carrier substrate for subsequent use; according to a mass ratio of 1:6, take coconut oil fatty acid diethanolamid...

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Abstract

The invention relates to a method for preparing a chemical chain combustion oxygen carrier from blast furnace slag, and belongs to the technical field of oxygen carrier preparation. The method comprises the following steps: firstly, smashing and sieving blast furnace slag; mixing with water by stirring, and filtering; drying filter residues; mixing with fatty alcohol-polyoxyethylene ether, grinding and calcining to obtain a chemical chain combustion oxygen carrier substrate; mixing coconut oil fatty acid diethanolamide and a ferric nitrate solution by stirring; adding citric acid and stirring; adding the chemical chain combustion oxygen carrier substrate and sodium borohydride for ultrasonic oscillation and filtering; calcining the filter residues. The chemical chain combustion oxygen carrier prepared by the method has the characteristics that the oxygen carrying rate is over 95 percent, the combustion of fuel is facilitated, the combustion rate is over 93 percent, bursting and surface sintering occur under the condition of excessive reduction, and the service life is prolonged.

Description

technical field [0001] The invention relates to a method for preparing a chemical chain combustion oxygen carrier by utilizing blast furnace slag, and belongs to the technical field of oxygen carrier preparation. Background technique [0002] Chemical looping combustion technology is a new type of combustion technology with distinctive characteristics of energy saving and emission reduction. It has CO 2 Internal separation properties, no need to add CO 2 The separation device can capture high-purity CO 2 gas. Chemical looping combustion utilizes the high-grade energy in the chemical looping combustion system to realize energy cascade utilization and improve energy efficiency. This method does not require a lot of energy consumption in the two processes of combustion and separation, separation and recovery of CO 2 Does not require additional energy consumption, does not reduce system efficiency, and recovers CO 2 And control of NOx has an absolute advantage. Chemical lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L10/00
CPCC10L10/00
Inventor 薛洋宋昊
Owner 嘉兴沃特泰科环保科技股份有限公司
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