Method for strengthening regeneration of organic phase after desulphurization and decarburization of phase change absorber

An organic phase and absorbent technology, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of affecting the regeneration process, slow regeneration process, and low regeneration efficiency

Inactive Publication Date: 2017-12-29
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems that the regeneration process of the absorbent is relatively slow and the regeneration efficiency is low in the current desulfurization and decarbonization process, which will affect the subsequent regeneration process and the absorption performance of the poor liquid after regeneration. Method for regeneration of organic phase after desulfurization and decarburization of enhanced phase change absorbent

Method used

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  • Method for strengthening regeneration of organic phase after desulphurization and decarburization of phase change absorber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] CO in flue gas 2 (Volume ratio) is 12.5%, and the rest are tested under the air source condition of air. When the gas flow rate is 10 L / min, the absorption temperature is 40°C, the amine concentration (mass ratio) of the phase-change absorbent is 20%, the solution circulation rate is 0.05 L / min, and the frequency of the standing wave sound field in the regeneration tower is 80 kHz, ultrasonic The sound intensity is 0.3 W / cm 2 , The regeneration temperature is 105.8°C. The experimental results show that the regeneration rate of the organic phase can reach 85% by using this technology.

Embodiment 2

[0026] SO in flue gas 2 (Volume ratio) is 1.8%, and the rest are tested under the air source condition of air. When the gas flow rate is 100 mL / min, the absorption temperature is 40 °C, the amine concentration (mass ratio) of the phase change absorbent is 20%, the frequency of the standing wave sound field in the boiler is 50 kHz, and the ultrasonic sound intensity is 0.8 W / cm 2 , the experimental results show that using this technology, the ultrasonic irradiation time is 5 minutes, and the regeneration rate of the organic phase in the absorbent reaches 70%.

Embodiment 3

[0028] Considering the synergistic effect of absorption temperature and ultrasound, experiments were carried out to increase the absorption temperature. CO in flue gas 2 (Volume ratio) is 12.5%, and the rest are tested under the air source condition of air. When the gas flow rate is 10 L / min, the absorption temperature is 60°C, the amine concentration (mass ratio) of the phase-change absorbent is 20%, the solution circulation rate is 0.05 L / min, and the frequency of the standing wave sound field in the boiler is 80 kHz, ultrasonic The sound intensity is 0.3 W / cm 2 , The regeneration temperature is 106.0°C. The experimental results show that the regeneration rate of the organic phase can reach 76.6% by using this technology.

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Abstract

The invention discloses a method for strengthening regeneration of an organic phase after desulphurization and decarburization of a phase change absorber, and belongs to the gas purification technology. The organic phase from a separator passes through a standing wave acoustic field processor in a boiling device firstly, ultrasonic displacement effect, cavitation effect and resonance effect act on the organic phase, carbamate bonds in the organic phase are easily broken, organic amine and carbon dioxide are generated, the carbon dioxide is sent to a regenerated gas separator from the bottom of a regeneration tower, and the organic amine after regeneration returns to an absorption tower through a barren liquor pump and is absorbed. The displacement effect of ultrasonic waves can make the organic phase regenerated substances continuously move, collide and agglomerate to wave loops or wave sections; a strong impact force and a high-speed micro jet flow produced by the cavitation effect can reduce frictional resistance in the collision agglomeration and settlement processes of organic phase to-be-regenerated substances, and at the same time, the generated thermal effect can play an effect of reducing the viscosity.

Description

technical field [0001] The invention relates to a regeneration method for strengthening the organic phase after desulfurization and decarburization of a phase-change absorbent, and belongs to the fields of material chemistry, gas separation or purification, and the like. Background technique [0002] The chemical absorption method used in gas desulfurization and decarbonization technology is one of the most mature methods at present, but a common problem it faces is high energy consumption. In response to this problem, work is currently being carried out from two aspects: new absorbent development and process improvement or new process research. The research idea of ​​new absorbents is mainly to develop new chemical absorbents. [0003] In recent years, some researchers have changed their way of thinking and began to study the use of phase change absorbents in the desulfurization and decarbonization process to solve the problem of high regeneration energy consumption. Acco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
CPCB01D53/1425B01D53/1456B01D2257/302B01D2257/504
Inventor 毛松柏陈曦江洋洋汪东黄汉根
Owner CHINA PETROLEUM & CHEM CORP
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