CN-121971951-A - Energy-saving carbon trapping method and system

CN121971951ACN 121971951 ACN121971951 ACN 121971951ACN-121971951-A

Abstract

The application provides an energy-saving carbon trapping method and system, wherein the method comprises the steps of S1, conducting an adsorption process to a first chamber, conducting adsorption heat to the first chamber, conducting a desorption process to the second chamber, conducting negative pressure to the second chamber, conducting desorption to the second chamber, conducting adsorption to the first chamber, conducting adsorption heat to the second chamber, conducting desorption to the first chamber, conducting negative pressure to the first chamber, conducting desorption to the adsorbent, conducting adsorption to the second chamber, conducting carbon dioxide-rich gas, conducting repeated conducting S1 and S2, conducting alternating adsorption heat transfer between the first chamber and the second chamber through a heat pipe assembly, and achieving interchamber cyclic utilization of adsorption heat energy and continuous carbon trapping operation. The application improves the heat exchange efficiency in the carbon capturing process.

Inventors

ZHANG ZUOTAI
YANG WEN
PENG XIONG
WANG SHUOYU
XU JIYUN

Assignees

深碳科技(深圳)有限公司

Dates

Publication Date: 20260505
Application Date: 20260401

Claims (10)

1. An energy-saving carbon capturing method, which is characterized by being applied to a carbon capturing device, wherein the device comprises a first chamber and a second chamber which are separated by a common chamber wall, a heat pipe assembly is arranged on the common chamber wall in a penetrating way, and an adsorbent is filled in each of the first chamber and the second chamber, and the method comprises the following steps: S1, enabling the first chamber to execute an adsorption process, introducing gas to be treated into the first chamber, enabling carbon dioxide in the gas to be treated to be adsorbed by an adsorbent and releasing adsorption heat, enabling the second chamber to execute a desorption process, applying negative pressure to the second chamber, enabling the adsorbent to desorb and release carbon dioxide-rich gas, and enabling the adsorption heat to be transferred from the first chamber to the second chamber through the heat pipe assembly; S2, when the first chamber is saturated in adsorption and/or the second chamber is desorbed, switching the second chamber to an adsorption process, introducing gas to be treated into the second chamber, enabling carbon dioxide in the gas to be treated to be adsorbed by an adsorbent and releasing adsorption heat; And step S3, repeatedly executing the step S1 and the step S2, and alternately transferring adsorption heat between the first chamber and the second chamber through the heat pipe assembly to realize interchamber recycling of adsorption heat energy and continuous carbon trapping operation.
2. The energy-efficient carbon trapping method according to claim 1, wherein a communication structure is provided between the first chamber and the second chamber, the communication structure being provided with a control valve, and further comprising between step S1 and step S2: Step T1, stopping introducing the gas to be treated into the first chamber and stopping applying negative pressure to the second chamber when the adsorption saturation of the first chamber and/or the desorption of the second chamber are completed; Step T2, opening the control valve to enable the first chamber to be communicated with the second chamber so as to reduce the pressure difference between the two chambers; and step T3, closing the control valve when the pressure difference between the first chamber and the second chamber is lower than a preset threshold value, and executing step S2.
3. An energy efficient carbon capture system for performing the energy efficient carbon capture method of any of claims 1-2, the system comprising: The carbon trapping device comprises a first chamber and a second chamber, wherein the first chamber and the second chamber are separated by a common chamber wall, a heat pipe assembly is arranged on the common chamber wall in a penetrating way, and the first chamber and the second chamber are filled with adsorbents; The gas conveying device is respectively connected with the gas inlet of the first chamber and the gas inlet of the second chamber and is used for conveying gas to be treated to the chamber in the adsorption process; and the negative pressure device is connected with the vacuumizing interface of the first chamber and the vacuumizing interface of the second chamber and is used for applying negative pressure to the chamber in the desorption process.
4. The energy efficient carbon capture system of claim 3 wherein the heat pipe assembly comprises a plurality of heat pipes arranged in parallel, the heat pipes extending through the common chamber wall, the outer walls of the heat pipes having extensions thereon, the projections of the extensions on the common chamber wall comprising at least one arcuate edge; when the number of the arc sides is one, the radian of the arc sides is When the number of the arc sides is two, the two arc sides are symmetrically arranged relative to the axis of the heat pipe, and the radian of the arc sides is between When the number of the arc sides is more than three, the three arc sides are annularly arranged relative to the axis of the heat pipe, and the radian of the arc sides is between Between them.
5. The energy efficient carbon capture system of claim 4, wherein the outer wall of the heat pipe is provided with one or more fins forming the extension; The fins are spirally wound along the axial direction of the heat pipe to form the extension part, or the fins are disc-shaped and are arranged at intervals along the axial direction of the heat pipe to form the extension part, or the fins are strip-shaped and are uniformly distributed on the outer wall of the heat pipe to form the extension part.
6. An energy efficient carbon capture system according to claim 3 wherein the common chamber wall is made of a metallic material, the common chamber wall having a first surface facing the first chamber and a second surface facing the second chamber, each of the first and second surfaces having outwardly extending microstructures for forming a multi-dimensional heat exchange interface within the first and second chambers.
7. The energy efficient carbon capture system of claim 6, wherein the microstructure comprises a plurality of ribs, wherein a distance between two adjacent ribs is 8-10 mm, a height of the ribs is 3-4 mm, and a width of the ribs is 2-2.5 mm.
8. An energy efficient carbon capture system according to claim 3 wherein a communication structure is provided between the first and second chambers, the communication structure being provided with a pass-through valve for selectively communicating or blocking the first and second chambers.
9. The energy efficient carbon capture system of claim 3 wherein the adsorbent is a molecular sieve adsorbent having a pore size of 0.3-0.5nm and a packing density of 0.6-1.2g/cm3 in the first and second chambers.
10. The energy-efficient carbon capture system of claims 3-9, further comprising a control device electrically connected to the delivery device and the negative pressure device, respectively, for controlling automatic switching of the first and second chambers between the adsorption and desorption processes according to preset logic.

Description

Energy-saving carbon trapping method and system Technical Field The application relates to the technical field of carbon capture, in particular to an energy-saving carbon capture method and system. Background Carbon capture technology is one of the key means to cope with global climate change and achieve low carbon emissions. In the prior industrial application, the adsorption method becomes a main technical route in the field of carbon capture due to the advantages of mild operation conditions, recyclable adsorbent, high selectivity and the like. The existing double-cavity or multi-cavity carbon trapping device is generally provided with two or more adsorption cavities, and continuous production is realized through alternate adsorption and desorption operations among the cavities. To maintain the desorption temperature, the prior art often requires the provision of external heat exchange devices to recover the heat of adsorption generated during the adsorption process and to provide heat to the desorption chamber. However, such external heat exchange device has the problems of long heat conduction path and many heat exchange links in actual operation, so that the adsorption heat cannot be efficiently recycled, and a large amount of heat energy is dissipated in the transmission process. Meanwhile, the desorption process still needs to rely on external energy to continuously heat so as to maintain the required temperature, and the energy consumption of the whole operation of the device is high. Disclosure of Invention In order to overcome the defects in the prior art, the application provides an energy-saving carbon capturing method and system. The specific technical scheme is as follows: In a first aspect, the present application provides an energy-saving carbon capturing method, applied to a carbon capturing device, where the device includes a first chamber and a second chamber separated by a common chamber wall, a heat pipe assembly is disposed through the common chamber wall, and an adsorbent is filled in each of the first chamber and the second chamber, and the method includes: S1, enabling the first chamber to execute an adsorption process, introducing gas to be treated into the first chamber, enabling carbon dioxide in the gas to be treated to be adsorbed by an adsorbent and releasing adsorption heat, enabling the second chamber to execute a desorption process, applying negative pressure to the second chamber, enabling the adsorbent to desorb and release carbon dioxide-rich gas, and enabling the adsorption heat to be transferred from the first chamber to the second chamber through the heat pipe assembly; S2, when the first chamber is saturated in adsorption and/or the second chamber is desorbed, switching the second chamber to an adsorption process, introducing gas to be treated into the second chamber, enabling carbon dioxide in the gas to be treated to be adsorbed by an adsorbent and releasing adsorption heat; And step S3, repeatedly executing the step S1 and the step S2, and alternately transferring adsorption heat between the first chamber and the second chamber through the heat pipe assembly to realize interchamber recycling of adsorption heat energy and continuous carbon trapping operation. In one embodiment, a communication structure is disposed between the first chamber and the second chamber, and the communication structure is provided with a conducting valve, and between step S1 and step S2, further includes: Step T1, stopping introducing the gas to be treated into the first chamber and stopping applying negative pressure to the second chamber when the adsorption saturation of the first chamber and/or the desorption of the second chamber are completed; Step T2, opening the conduction valve to enable the first chamber to be communicated with the second chamber so as to reduce the pressure difference between the two chambers; And step T3, closing the conducting valve when the pressure difference between the first chamber and the second chamber is lower than a preset threshold value, and executing step S2. In a second aspect, the present application also provides an energy-saving carbon capture system for performing any one of the energy-saving carbon capture methods described above, the system comprising: The carbon trapping device comprises a first chamber and a second chamber, wherein the first chamber and the second chamber are separated by a common chamber wall, a heat pipe assembly is arranged on the common chamber wall in a penetrating way, and the first chamber and the second chamber are filled with adsorbents; The gas conveying device is respectively connected with the gas inlet of the first chamber and the gas inlet of the second chamber and is used for conveying gas to be treated to the chamber in the adsorption process; and the negative pressure device is connected with the vacuumizing interface of the first chamber and the vacuumizing interface of the second chamber and is used for