CN-122006414-A - CO based on hydrogen micro-bubbles2Enhanced desorption device and method

Abstract

The invention discloses a CO 2 enhanced desorption device and method based on hydrogen microbubbles, and belongs to the technical field of carbon emission. The CO 2 strengthening desorption device based on hydrogen microbubbles comprises a desorption tower, wherein the desorption tower is connected with an absorption tower and a hydrogen production device, the top of the desorption tower is also connected with a CO 2 catalytic conversion device, a microbubble generator is arranged in the desorption tower and is positioned at the bottom of the desorption tower, and the microbubble generator is connected with the hydrogen production device. The invention breaks green hydrogen prepared by renewable energy into micro-bubbles through the micro-bubble generator, and remarkably increases the turbulence degree at the bottom of the desorption tower, thereby improving the desorption rate of CO 2 from rich liquid, and simultaneously, reduces the partial pressure of gas phase CO 2 through the generated hydrogen micro-bubbles, breaks the mass transfer balance of CO 2 desorption, and enhances the mass transfer driving force of CO 2 from liquid phase to gas phase.

Inventors

• LIU CHANG
• HOU FENG
• WANG HUANJUN
• MA FENGMING
• NIU HONGWEI
• LIU NIU
• ZHAO XU
• ZHANG YUANXUE

Assignees

• 中国华能集团清洁能源技术研究院有限公司
• 华能吉林发电有限公司长春热电厂

Dates

Publication Date

20260512

Application Date

20260129

Claims (10)

1. 1. The CO 2 strengthening desorption device based on hydrogen microbubbles is characterized by comprising a desorption tower, wherein the desorption tower is connected with an absorption tower and a hydrogen production device, and the top of the desorption tower is also connected with a CO 2 catalytic conversion device; The inside of the desorption tower is provided with a micro-bubble generator, the micro-bubble generator is positioned at the bottom of the desorption tower, and the micro-bubble generator is connected with the hydrogen production device.
2. 2. The CO 2 enhanced desorption device based on hydrogen microbubbles of claim 1, wherein the absorption tower is connected with a lean-rich liquid exchanger, and the lean-rich liquid exchanger is connected with the desorption tower.
3. 3. The CO 2 enhanced desorption device based on hydrogen microbubbles of claim 1, wherein a double-layer porous distributor is arranged in the desorption tower and is positioned above the microbubble generator.
4. 4. The CO 2 enhanced desorption device based on hydrogen microbubbles according to claim 1, wherein the upper end and the lower end of the desorption tower are connected with the absorption tower.
5. 5. The CO 2 enhanced desorption device based on hydrogen microbubbles according to claim 1, wherein a deflector and a filler are arranged inside the desorption tower.
6. 6. The CO 2 enhanced desorption device based on hydrogen microbubbles of claim 5, wherein the desorption tower is connected with a reboiler, and one end of the reboiler is connected with a guide plate.
7. 7. A CO 2 enhanced desorption apparatus based on hydrogen microbubbles as set forth in claim 1, wherein the hydrogen production apparatus is provided with a flow control meter.
8. 8. A method for enhancing desorption of CO 2 based on hydrogen microbubbles, realized based on a CO 2 enhanced desorption device based on hydrogen microbubbles according to any one of claims 1 to 7, comprising the steps of: Introducing CO 2 rich liquid in the absorption tower into a desorption tower; the microbubble generator converts hydrogen generated by the hydrogen production device into hydrogen microbubbles; The CO 2 rich liquid promotes CO 2 desorption under the action of hydrogen microbubbles; The mixed gas of H 2 and CO 2 enters a CO 2 catalytic conversion device in proportion.
9. 9. The method for CO 2 enhanced desorption based on hydrogen microbubbles of claim 8, wherein the CO 2 rich liquid promotes CO 2 desorption under the action of hydrogen microbubbles and comprises the step of enhancing the mass transfer driving force of CO 2 from liquid phase to gas phase by changing the partial pressure of CO 2 in the gas phase during CO 2 desorption.
10. 10. A CO 2 enhanced desorption method based on hydrogen microbubbles, as set forth in claim 8, wherein the hydrogen microbubbles have a diameter of 100 μm to 500. Mu.m.

Description

CO 2 enhanced desorption device and method based on hydrogen microbubbles Technical Field The invention relates to the technical field of carbon emission, in particular to a CO 2 reinforced desorption device and method based on hydrogen microbubbles. Background Carbon dioxide (CO 2) has become an important focus of global climate change research as one of the major greenhouse gases. The CO 2 capture, utilization and sequestration technology (CCUS) is considered to be one of the key means to slow down climate change and reduce CO 2 emissions. With the advancement of global carbon neutralization targets, carbon capture, utilization and sequestration (CCUS) facilities have grown rapidly in recent years, but with the consequent increased problems of post-capture CO 2 digestion. Although the technology (such as CO 2 oil displacement, food-grade application and the like) is directly utilized to make a certain development in local scenes, the consumption scale of the technology is only less than 1% of the global emission, and geological sequestration is regarded as an important path for large-scale emission reduction and faces the reality dilemma of 'source-sink mismatch'. The conversion of CO 2 to high value-added fuels and chemicals (e.g., methanol, olefins, synthetic fuels, etc.) is an important development in the future. In the traditional carbon emission reduction path, the carbon trapping device needs to consume a large amount of high-grade energy sources to purify CO 2 in the flue gas to more than 99vo & lt 1 & gt, and the process realizes the acquisition of high-purity gas by reducing the system entropy. However, the subsequent CO 2 conversion step (e.g., synthesizing methanol, synthetic fuel, etc.) often requires mixing CO 2 with hydrogen to reform the mixture for reaction. The separation-mixing mode of 'pre-entropy reduction purification and post-entropy increase mixing' not only increases extra energy loss, but also reduces the energy efficiency of the whole system, and is difficult to improve the economy. Disclosure of Invention The invention aims to provide a CO 2 enhanced desorption device and method based on hydrogen microbubbles, which are used for solving the technical problem of low energy utilization in the mode of purifying before mixing in a CO 2 capturing-utilizing path in the prior art. In order to achieve the above purpose, in one embodiment of the present invention, a CO 2 enhanced desorption device based on hydrogen microbubbles is provided, which includes a desorption tower, the desorption tower is connected with an absorption tower and a hydrogen production device, and the top of the desorption tower is also connected with a CO 2 catalytic conversion device; The inside of the desorption tower is provided with a micro-bubble generator which is positioned at the bottom of the desorption tower and is connected with the hydrogen production device. According to one of the preferred schemes of the invention, the absorption tower is connected with a lean and rich liquid exchanger, and the lean and rich liquid exchanger is connected with the desorption tower. In one of the preferred schemes of the invention, a double-layer porous distributor is arranged in the desorption tower, and the double-layer porous distributor is positioned above the microbubble generator. In one of the preferred embodiments of the present invention, the upper end and the lower end of the desorption tower are connected to the absorption tower. In one of the preferred schemes of the invention, a guide plate and a filler are arranged in the desorber. In one of the preferred schemes of the invention, the desorption tower is connected with a reboiler, and one end of the reboiler is connected with the guide plate. In one preferred embodiment of the present invention, the hydrogen production apparatus is provided with a flow rate control meter. The invention also discloses a CO 2 enhanced desorption method based on hydrogen micro-bubbles, which is realized based on the CO 2 enhanced desorption device based on the hydrogen micro-bubbles and comprises the following steps: Introducing CO 2 rich liquid in the absorption tower into a desorption tower; the microbubble generator converts hydrogen generated by the hydrogen production device into hydrogen microbubbles; The CO 2 rich liquid promotes CO 2 desorption under the action of hydrogen microbubbles; The mixed gas of H 2 and CO 2 enters a CO 2 catalytic conversion device in proportion. The CO 2 rich liquid promotes CO 2 desorption under the action of hydrogen microbubbles, wherein the CO 2 rich liquid heated by the reboiler is fully contacted with the hydrogen microbubbles in the tower bottom of the desorption tower to promote CO 2 desorption. In one of the preferred schemes of the invention, CO 2 desorption promotion of CO 2 rich liquid under the action of hydrogen microbubbles comprises the steps of enhancing the mass transfer driving force of CO 2 from liquid phase to gas phas