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Circumfluence type film separation device for carbon dioxide recovery and condensation

A carbon dioxide and membrane separation technology, applied in the field of gas absorption and membrane separation engineering, which can solve the problems of high energy consumption and large equipment.

Inactive Publication Date: 2007-05-16
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention adopts the loop reactor as the absorbing equipment of carbon dioxide, adopts the membrane contactor as the desorbing equipment of carbon dioxide, and couples the two by adding pipelines at appropriate positions, aiming to overcome the traditional carbon dioxide separation and recovery process with huge equipment and high energy consumption defect

Method used

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  • Circumfluence type film separation device for carbon dioxide recovery and condensation
  • Circumfluence type film separation device for carbon dioxide recovery and condensation

Examples

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Effect test

Embodiment 1

[0022] Example 1: Using a loop bubbling reactor as a carbon dioxide absorption device, using a hollow fiber membrane element as a carbon dioxide desorption membrane contactor, according to the process shown in Figure 1, using monoethanolamine as a carbon dioxide absorbent, and successively carrying out carbon dioxide absorption and desorption experiments . After the absorption liquid is saturated (the pH value is stable), the carbon dioxide desorption experiment is carried out in the membrane contactor at room temperature, and the relationship between the pH and temperature of the absorption liquid with time is measured (Figure 2). As shown in the figure, after the desorption operation starts, the pH value of the solution rises gradually, and the desorption effect is obvious.

Embodiment 2

[0023] Example 2: Using a loop bubbling reactor as a carbon dioxide absorption device, using a hollow fiber membrane element as a carbon dioxide desorption membrane contactor, according to the process shown in Figure 1, using monoethanolamine as a carbon dioxide absorbent, and successively carrying out carbon dioxide absorption and desorption experiments . After the absorption liquid is saturated (the pH value is stable), the carbon dioxide desorption experiment is carried out in the membrane contactor under the condition of elevated temperature, and the relationship between the pH and temperature of the absorption liquid with time is measured (Figure 3). As shown in the figure, after the operation starts, the pH value of the solution rises gradually, and the desorption effect is obvious.

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Abstract

The invention discloses a device based on film separating gas recycling and condensing technological domain, which contains bubble circulating separator or hollow fiber film separator as carbon dioxide adsorbing part, wherein the other hollow fiber film pipe can be carbon dioxide desorption; the top possesses liquid adsorption inlet pipe and tail gas vent pipe; the bottom possesses waste gas inlet pipe from bottom to top of gas distributor; the middle of contact device connects reactor through interconnecting pipe, which carries the adsorption liquid of carbon dioxide into the bottom of contact device to realize gas-liquid separation; the top of contact device contains vacuum pump or steam source, which carries carbon dioxide in the hollow fiber film pipe away.

Description

Technical field: [0001] The invention belongs to the field of gas absorption and membrane separation engineering. Background technique: [0002] Combustion of fossil fuels produces large amounts of carbon dioxide. On the one hand, carbon dioxide acts as a greenhouse gas and causes the atmosphere to warm. On the other hand, carbon dioxide has a wide range of uses, such as liquid carbon dioxide and dry ice can be used in tobacco, plastic foaming, food preservation and other fields, supercritical carbon dioxide can be used for extraction, cleaning, carbon dioxide can also be used as chemical raw materials to produce a variety of organic and inorganic chemical raw materials Wait. Therefore, the separation and recovery of carbon dioxide is of great significance. The methods for recovering carbon dioxide include physical methods such as adsorption, low-temperature separation and membrane separation, and chemical methods such as chemical absorption and ion exchange. Among them,...

Claims

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Application Information

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IPC IPC(8): C01B31/20C01B32/50
CPCY02C10/10Y02C20/40Y02P20/151
Inventor 王保国杨毅白莹彭勇
Owner TSINGHUA UNIV
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