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A reactor for strengthening calcium-based solid waste mineralization and fixing carbon dioxide in an ammonia medium system and its use method

A carbon dioxide and reactor technology, applied in chemical instruments and methods, calcium carbonate/strontium/barium, chemical/physical processes, etc., can solve the problems of large kinetic energy consumption, easy deposition of solid materials, and difficult sealing, and achieve improved utilization. efficiency, improving conversion rate and reaction rate, and reducing energy consumption

Inactive Publication Date: 2018-03-16
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This reactor overcomes the disadvantages of the stirred tank reactor, such as the large kinetic energy consumption, the difficulty of sealing the high-pressure system, and the easy deposition of solid materials in the bubble column reactor without mechanical stirring.

Method used

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  • A reactor for strengthening calcium-based solid waste mineralization and fixing carbon dioxide in an ammonia medium system and its use method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The size of the pressurized loop reactor is as follows: the height-to-diameter ratio of the guide tube (2) in the pressurized loop reactor (1) is 20:1, and the cross-sectional area of ​​the pressurized loop reactor (1) and the flow guide The ratio of the cross-sectional area of ​​the tube (2) is 1:0.2, the cone angle of the lower end of the guide tube (2) is 30 degrees, and the ratio of the cross-sectional area of ​​the lower end of the guide tube (2) (3) is 1:0.3.

[0035] Operation method: Stir and mix the phosphogypsum particles with a certain particle size and a certain concentration of ammonium carbonate aqueous solution obtained after pretreatment, and continuously inject them into the pressurized loop reactor (1) through the feed port (8). ℃ temperature and the gas inlet (4) through the gas inlet (4) continuously into the pressure of 40bar containing CO 2 gas, in which CO 2 The content is 20%, and the enhanced carbonation reaction is carried out. The product af...

Embodiment 2

[0038] The size of the pressurized loop reactor is as follows: the height-to-diameter ratio of the guide tube (2) in the pressurized loop reactor (1) is 2:1, and the cross-sectional area of ​​the pressurized loop reactor (1) is related to the flow guide The ratio of the cross-sectional area of ​​the tube (2) is 1:0.8, the cone angle of the lower end of the diversion tube (2) (3) is 150 degrees, and the ratio of the cross-sectional area of ​​the lower end of the diversion tube (2) (3) is 1:0.8.

[0039] Operation method: Stir and mix the phosphogypsum particles with a certain particle size and a certain concentration of ammonium carbonate aqueous solution obtained after pretreatment, and continuously inject them into the pressurized loop reactor (1) through the feed port (8). ℃ temperature and the gas inlet (4) through the gas inlet (4) continuously into the pressure of 1bar containing CO 2 gas, in which CO 2 The content is 99.99%, and the enhanced carbonation reaction is car...

Embodiment 3

[0042] The size of the pressurized loop reactor is as follows: the height-to-diameter ratio of the guide cylinder (2) in the pressurized loop reactor (1) is 10:1, and the cylinder cross-sectional area of ​​the pressurized loop reactor (1) The ratio of the cross-sectional area of ​​the tube (2) is 1:0.5, the cone angle of the lower end of the diversion tube (2) (3) is 90 degrees, and the ratio of the cross-sectional area of ​​the lower end of the diversion tube (2) (3) is 1:0.5.

[0043] Operation method: Stir and mix the phosphogypsum particles with a certain particle size and a certain concentration of ammonium carbonate aqueous solution obtained after pretreatment, and continuously inject them into the pressurized loop reactor (1) through the feed port (8). ℃ temperature and the gas inlet (4) through the gas inlet (4) continuously into the pressure of 10bar containing CO 2 gas, in which CO 2 The content is 99.99%, and the enhanced carbonation reaction is carried out. The p...

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Abstract

The invention relates to a reactor for strengthening calcium-based solid waste mineralization and fixing carbon dioxide in an ammonia medium system and a use method thereof, which is characterized in that the pressurized circulation reactor is used in the process of ammonia medium system strengthening calcium-based solid waste mineralization and fixing carbon dioxide, Wherein the adopted reaction temperature is 60-200° C., the reaction residence time is 5-60 minutes, the CO2 gas partial pressure is 1-40 bar, and the CO2 gas concentration is 20-99.99%. The pressurized loop reactor overcomes the disadvantages of large kinetic energy consumption of a stirred tank reactor, difficulty in sealing a high-pressure system, and easy deposition of solid materials in a bubble column reactor without mechanical stirring. The advantage of this reactor is that it adopts pneumatic stirring instead of mechanical stirring, has low energy consumption, and is easy to process, clean, maintain and operate, and is especially suitable for the process of strengthening calcium-based solid waste mineralization and fixing carbon dioxide in ammonia medium system with high-pressure gas and High solid content feature, easy for industrial scale-up.

Description

technical field [0001] The invention belongs to waste resource utilization, greenhouse gas CO 2 The technical field of emission reduction and resource utilization, in particular, relates to a reactor and a use method for strengthening calcium-based solid waste mineralization and fixing carbon dioxide in an ammonia medium system. Background technique [0002] Greenhouse gas CO 2 Global climate change caused by emissions has become a major concern of the world. CO is being carried out extensively at home and abroad 2 Research and development and industrial trials of large-scale disposal technologies. Geological storage, marine storage, and mineralized fixation are CO 2 Primary means of mass disposal. CO 2 Mineralization fixation is not only seen as a way to achieve CO 2 An effective way to obtain stable storage is also to achieve CO 2 An effective way for large-scale resource utilization. Compared with natural magnesium-based minerals, the use of calcium-containing bu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/08B01F13/02C01F11/18B01F33/40
Inventor 李会泉赵红涛包炜军李松庚王晨晔孙振华盛勇李兵梅胜明周佩
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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