Preparation method of spherical composite oxygen carrier, product and device

An oxygen carrier and spherical technology, which is applied in the field of preparation of spherical composite oxygen carriers, can solve the problems of difficulty in meeting the needs of large-scale installations in large quantities, and achieve the effects of uniform speed control, uniform drying, and reduced wear and tear.

Pending Publication Date: 2020-02-14
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the traditional laboratory preparation method is difficult to meet the needs of large-scale devices and large-scale industrial devices, so the spray drying method is introduced into the oxygen carrier preparation method

Method used

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  • Preparation method of spherical composite oxygen carrier, product and device
  • Preparation method of spherical composite oxygen carrier, product and device
  • Preparation method of spherical composite oxygen carrier, product and device

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preparation example Construction

[0044] Such as figure 1 As shown, the industrial batch preparation method of cheap spherical composite oxygen carriers using ore or industrial waste as raw materials in the present invention is beneficial to realize the industrial production of oxygen carriers by combining the industrially mature spray drying technology. A preparation method of a spherical composite oxygen carrier of the present invention specifically comprises the following steps:

[0045] Step 1: Mix different types of ore powders or industrial waste powders and disperse them in water, then add a dispersant and transfer them to a ball mill for ball milling to obtain an initial slurry. The particle diameters of the ore powder and the industrial waste powder are both less than 100 μm.

[0046] Specifically, in Step 1, the particle size of the ore powder and the industrial waste powder are both less than 100 μm, and both are substances that can be used as oxygen carriers for chemical looping combustion, wherei...

Embodiment 1

[0063] (1) 374g of red mud powder and 46g of copper ore powder are added to 200ml of water, and after adding 1.0wt% ammonium citrate dispersant to the water, the slurry is transferred to a ball mill for ball milling. The ball mill speed is 120r / min. Time is 1h, obtains initial slurry;

[0064] (2) Add 1.0wt% binder polyvinyl alcohol to the initial slurry obtained in step (1), continue ball milling for 10 minutes, and the ball milling speed is 120r / min to obtain the final slurry;

[0065] (3) The air inlet temperature of the spray dryer is set to be 185° C., and the slurry obtained in step (2) is pumped into the drying chamber by a peristaltic pump at a speed of 60 r / min. After the spray drying process is completed, it is obtained in the collection bucket. Spherical oxygen carrier particles;

[0066] (4) Take out the spherical oxygen carrier particles, sieve to obtain oxygen carrier particles with a particle size of 100 μm-350 μm, and calcinate at 1200° C. in an air atmosphere...

Embodiment 2

[0069] (1) 338 red mud powder and 42g copper ore powder are added in 200ml water, after adding the ammonium citrate dispersant of 1.0wt% in water, slurry is transferred to row ball mill and carry out ball mill, and the speed of ball mill is 120r / min, The ball milling time is 5h to obtain the initial slurry;

[0070] (2) Add 1.6wt% binder polyvinyl alcohol to the initial slurry obtained in step (1), continue ball milling for 20 minutes, and the ball milling speed is 120r / min to obtain the final slurry;

[0071] (3) The air inlet temperature of the spray dryer is set to be 205° C., and the slurry obtained in step (2) is pumped into the drying chamber by a peristaltic pump at a speed of 55 r / min. After the spray drying process is completed, it is obtained in the collection bucket. Spherical oxygen carrier particles;

[0072] (4) Take out the spherical oxygen carrier particles, sieve to obtain oxygen carrier particles with a particle size of 100 μm-350 μm, and calcinate at 1150° ...

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Abstract

The invention belongs to the field of preparation of a chemical-looping combustion oxygen carrier, and particularly discloses a preparation method of a spherical composite oxygen carrier, a product and a device. The preparation method comprises the steps that different kinds of ore powder or industrial waste powder with a particle size of not more than 100 [mu]m are evenly mixed and then dispersedin water, a dispersing agent is added, ball milling is performed, then a binder is added, ball milling is continued, after the obtained slurry is spray-dried and granulated, particles with a target particle size are screened out, the particles with the target particle size are calcined, and the spherical composite oxygen carrier is obtained. The product is prepared by the preparation method. Thedevice includes a slurry preparation module, a spray drying and granulation module and a post-processing module. The method for industrialized batch preparation of inexpensive spherical composite oxygen carriers using ore or industrial waste as raw materials facilitates realization of the industrialized production of oxygen carriers in combination with the industrially mature spray drying technology.

Description

technical field [0001] The invention belongs to the field of preparation of chemical looping combustion oxygen carrier, and more specifically relates to a preparation method, product and device of a spherical composite oxygen carrier. Background technique [0002] Chemical chain combustion is a novel combustion technology, which decomposes the traditional chemical conversion process into two or more chemical reactions, avoids the direct contact between fuel and oxygen, and uses oxygen carrier as the oxygen carrier and reaction medium. The reactors are circulated to realize the transfer of oxygen and transfer the heat generated by the reaction continuously. Therefore, the selection of oxygen carriers is considered to be one of the most important components in the chemical looping combustion process. The performance of the oxygen carrier can be evaluated from the aspects of oxygen transfer capacity, redox reaction rate, mechanical properties (anti-sintering, agglomeration, we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L10/00B01J2/04
CPCB01J2/04C10L10/00C10L2290/18
Inventor 赵海波苏钊马琎晨王亚男杜寒
Owner HUAZHONG UNIV OF SCI & TECH
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