Carbon dioxide gas recovery device

Abstract

The utility model belongs to the field of waste gas treatment of inorganic chemical production and environmental protection, and provides a carbon dioxide gas recovery device which is a carbon recovery device with a certain treatment scale and is composed of a plurality of adsorption modules arranged inside and a peripheral enclosure plate; the adsorption modules are spliced according to a certain rule, the upper and lower adsorption modules in the same column are arranged in the same direction, the adjacent columns are arranged in opposite directions, part of the adsorption modules are in an adsorption state through valve control, the other part of the adsorption modules are in a purging process and a cooling process, and the other part of the adsorption modules are in a desorption state; the adsorption module comprises a plurality of spliced adsorption units and a box body. According to the device, modular design and combination, factory processing, field splicing and pipe connection are adopted, the processing precision can be guaranteed, leakage is prevented, large-scale combination is flexible, and construction and maintenance are convenient; the carbon recovery efficiency is high, and the obvious effect on carbon emission reduction is achieved; no chemical reaction occurs, desorption is easy, and the carbon dioxide recovery cost is low.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment in inorganic chemical production and environmental protection, and in particular to a carbon dioxide gas recovery device. Background Technology

[0002] Extensive and in-depth research on carbon dioxide emission reduction technologies is being conducted across various industries, including: optimizing and adjusting energy structures, improving energy efficiency, and reducing carbon emissions; carbon dioxide solidification and recovery; and increasing natural carbon reduction through forests. Among these, carbon dioxide solidification and recovery is a completely new technological field, and this invention is a carbon dioxide recovery process and device developed in this context. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and provide a brand-new carbon dioxide adsorption and recovery device to solve the problems of difficult carbon dioxide gas recovery, inability to guarantee quality, and high recovery cost.

[0004] The technical solution of the present invention is: a carbon dioxide gas recovery device, which consists of a number of adsorption modules installed inside and a protective plate on the outside; the adsorption modules are assembled in a certain pattern, with the adsorption modules in the same row arranged in the same direction and the adsorption modules in adjacent rows arranged in opposite directions. Through valve control, some adsorption modules are always in the adsorption state, while other adsorption modules are in the purging process and cooling process, and some adsorption modules are in the desorption state.

[0005] The adsorption module consists of several assembled adsorption units and a housing;

[0006] The housing includes an inlet static pressure chamber, an adsorption or desorption chamber, and an outlet gas collection chamber that are interconnected. The adsorption unit is located in the adsorption or desorption chamber.

[0007] One end of the intake static pressure chamber is equipped with a carbon-containing mixed gas inlet and an automatic intake switching valve, while the other end is equipped with a desorption steam inlet pipe and a purge air inlet pipe.

[0008] One end of the gas collection chamber is equipped with a desorbed carbon gas outlet pipe and a purge exhaust gas outlet pipe, while the other end is equipped with a decarbonized gas outlet and an automatic gas switching valve. The decarbonized gas outlet is oriented opposite to the carbon-containing mixed gas inlet.

[0009] Preferably, a detachable movable inspection plate is provided on the side of the intake static pressure chamber for inspecting and cleaning the inside of the adsorption module and replacing the adsorption unit.

[0010] Furthermore, the adsorption unit is a honeycomb structure made of layered hydrotalcite or hydrotalcite precursor material.

[0011] Furthermore, the cross-sectional dimensions of the honeycomb structure are 75-300mm in length and width, 500-2000mm in length, and the number of holes in a single cross-section is greater than or equal to 32.

[0012] Preferably, the cross-sectional dimensions of the honeycomb structure are both 100-200mm in length and width, 600-1800mm in length, and the number of holes in a single cross-section is 40-80.

[0013] More preferably, the cross-sectional dimensions of the honeycomb structure are 150*150mm, the length is 1500mm, and the number of pores in the single cross-section is 60. This size facilitates the adsorption of carbon dioxide, ensuring adsorption efficiency and effectiveness, while also promoting desorption. If the size is smaller than this, adsorption is not conducive; if the size is larger than this, desorption is not conducive, resulting in a longer desorption time.

[0014] Furthermore, the dimensions of the adsorption module are all between 1 and 5 meters (length, width, and height). Preferably, the dimensions of the adsorption module are all between 1.5 and 4.5 meters (length, width, and height). More preferably, the dimensions of the adsorption module are 2*2*4 meters; this facilitates the assembly and transportation of the equipment.

[0015] Furthermore, the desorption steam inlet pipe, the purge air inlet pipe, the desorption carbon gas outlet pipe, and the purge exhaust gas outlet pipe are all equipped with automatic valves, which are opened and closed by the control system.

[0016] Furthermore, during operation, the carbon-containing mixed gas enters the intake static pressure chamber from the carbon-containing mixed gas inlet, flows evenly through the adsorption unit, and the carbon dioxide in the mixed gas is selectively adsorbed and retained by the adsorption unit. The exhaust gas is discharged through the exhaust gas collection chamber and the decarbonized gas outlet. After valve switching, it enters the purging and desorption stages in sequence.

[0017] Furthermore, during the purging process, the valves of the purging air inlet pipe and the purging exhaust gas outlet pipe are opened, while all other valves are closed. Clean air purges and discharges the residual exhaust gas inside the adsorption module, preventing any impact on the quality of the desorbed and recovered carbon dioxide gas.

[0018] Further, after purging, the process enters the desorption / desorption stage. The desorption steam inlet valve and the desorption carbon-rich gas outlet valve are opened, while all other valves are closed. Steam flows through the adsorbent material, and the carbon dioxide previously adsorbed in the honeycomb is desorbed. After being discharged with the desorption steam, it undergoes condensation and gas-liquid separation. The steam is condensed into water and separated from the gas. The remaining gas is carbon dioxide, which can be compressed into dry ice or further purified into food-grade carbon dioxide products.

[0019] Furthermore, after the desorption process, the process switches to the cooling process. The inlet valve for clean air and the exhaust valve for purging are opened again, while all other valves are closed. Air is used to carry away the residual heat inside the adsorbent, reducing the temperature inside the module and preventing poor adsorption at high temperatures, which would reduce the carbon recovery rate. After the cooling process, the process switches to the next adsorption process, and this cycle is repeated.

[0020] Furthermore, based on the flow rate of carbon-containing waste gas to be treated, at least two adsorption modules are assembled to form a carbon dioxide recovery device; during assembly, the adsorption modules in a single row are arranged horizontally in the same direction, while adjacent rows are arranged in opposite directions to facilitate pipe connection; there is a steel structure between the adsorption modules to support and fix the modules.

[0021] The present invention has the following beneficial effects:

[0022] 1. This device adopts a modular design and combination, is processed in the factory, and assembled and connected on site, which can ensure processing accuracy, prevent leakage, and is flexible in scale combination, construction and maintenance.

[0023] 2. This device has high carbon recovery efficiency and is effective in achieving carbon emission reduction.

[0024] 3. This process device does not involve chemical reactions, desorption is easy, and the cost of recovering carbon dioxide is low.

[0025] The detailed structure of the present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the carbon recovery device of the present invention;

[0027] Figure 2 This is a schematic diagram of the adsorption module assembly.

[0028] Figure 3 This is a schematic diagram of the reverse assembly of the adsorption module;

[0029] Figure 4 A schematic diagram showing the installation of the adsorption unit inside the adsorption module;

[0030] Figure 5 A schematic diagram of the process cycle sequence for each individual module;

[0031] 1-Carbon-containing mixed gas inlet, 2-Automatic inlet switching valve, 3-Inlet static pressure chamber, 4-Adsorption module, 5-Outlet gas collection chamber, 6-Automatic outlet switching valve, 7-Decarbonized gas outlet, 8-Desorption steam inlet pipe, 9-Purge air inlet pipe, 10-Movable inspection plate, 11-Desorbed carbon gas outlet pipe, 12-Purge exhaust gas outlet pipe, 13-Adsorption unit, 14-Adsorption process, 15-Purge process, 16-Desorption process, 17-Cooling process, 18-Enclosure plate, 19-Main air inlet, 20-Main air outlet. Detailed Implementation

[0032] Example 1

[0033] As shown in the attached figure: A carbon dioxide gas recovery device consists of several adsorption modules 4 installed inside and an outer enclosure 18, forming a carbon recovery device with a certain processing capacity. The carbon recovery device has a main air outlet 20 on the left side and a main air inlet 19 on the right side. The enclosure 18 is equipped with a disassembly door panel to facilitate the installation, inspection and maintenance of the equipment. The adsorption modules 4 are assembled in a certain pattern. The adsorption modules 4 in the same row are arranged in the same direction, and the adsorption modules in adjacent rows are arranged in opposite directions. Through valve control, some adsorption modules 4 are always in the adsorption state, while other adsorption modules 4 are in the purging process 15 and the cooling process 17, and some adsorption modules 4 are in the desorption state.

[0034] During the assembly process, six adsorption modules 4 are assembled according to the flow rate of carbon-containing waste gas to form a carbon dioxide recovery device of a certain scale. During assembly, the adsorption modules 4 in a single row are arranged horizontally in the same direction, while adjacent rows are arranged in opposite directions to facilitate pipe connection. There is a steel structure between the adsorption modules 4 to support and fix the modules.

[0035] Preferably, the adsorption module 4 has a size of 2*2*4 meters; the adsorption module 4 includes several assembled adsorption units 13 and a housing; the housing includes an interconnected inlet static pressure chamber 3, an adsorption or desorption chamber, and an outlet gas collection chamber 5, and the adsorption units 13 are arranged in the adsorption or desorption chamber; the adsorption unit 13 is a honeycomb structure made of hydrotalcite precursor material; the cross-sectional dimensions of the honeycomb structure are 150*150mm, the length is 1000mm, and the number of holes in the single cross-section is 32; one end of the inlet static pressure chamber 3 is provided with a carbon-containing mixed gas inlet 1 and an inlet automatic switching valve 2, and the other end is provided with a desorption steam inlet pipe 8 and a purge air inlet pipe 9; one end of the outlet gas collection chamber 5 is provided with a desorbed carbon gas outlet pipe 11 and a purge exhaust gas outlet pipe 12, and the other end is provided with a decarbonized gas outlet 7 and an outlet automatic switching valve 6, and the orientation of the decarbonized gas outlet 7 is opposite to that of the carbon-containing mixed gas inlet 1.

[0036] Preferably, automatic valves are installed on the desorption steam inlet pipe 8, the purge air inlet pipe 9, the desorption carbon gas outlet pipe 11, and the purge exhaust gas outlet pipe 12. The automatic valves are opened and closed by the control system. More preferably, a detachable movable inspection plate 10 is provided on the side of the intake static pressure chamber 3 for inspecting and cleaning the inside of the adsorption module 4 and replacing the adsorption unit 13.

[0037] During operation, the carbon-containing mixed gas enters the inlet static pressure chamber 3 from the carbon-containing mixed gas inlet 1 and flows evenly through the adsorption unit 13. The carbon dioxide in the mixed gas is selectively adsorbed and retained by the adsorption unit 13, and the waste gas is discharged through the outlet gas collection chamber 5 and the decarbonized gas outlet 7. After valve switching, it enters the purging and desorption stages. When entering the purging process 15, the purging air inlet pipe 9 and the purging waste gas outlet pipe 12 valve are opened, and all other valves are closed. Clean air purges and discharges the residual waste gas inside the adsorption module 4 to prevent it from affecting the quality of the desorbed and recovered carbon dioxide gas. After purging, it enters the desorption process 16. The desorption steam inlet valve and the desorption carbon-rich gas outlet valve are opened, and all other valves are closed. Steam flows through the adsorption material, and the carbon dioxide previously adsorbed in the honeycomb is desorbed. After being discharged with the desorption steam, it is condensed and separated into water. The remaining gas is carbon dioxide, which can be compressed to make dry ice or further purified to make food carbon dioxide products. After the desorption process 16, the process switches to the cooling process 17. The clean air inlet valve and the clean air exhaust valve are opened again, while all other valves are closed. Air is used to remove the residual heat in the adsorbent, reducing the temperature inside the module and preventing poor adsorption at high temperatures, which would reduce the carbon recovery rate. After the cooling process 17, the process switches to the next adsorption process 14, and this cycle continues.

[0038] Example 2

[0039] The difference between this embodiment and the first embodiment is that: eight adsorption modules 4 are assembled together according to a certain pattern, with modules in the same column arranged in the same direction and adjacent columns arranged in opposite directions. An outer enclosure 18 is added to form a carbon recovery device with a suitable processing capacity. Carbon-containing waste gas enters each adsorption module 4 in turn through valve switching. The adsorption unit 13 is a layered structure of hydrotalcite, which adsorbs carbon dioxide in the waste gas onto the adsorption material in the module. After adsorption saturation, the device switches to the purging process 15, using clean air to purge each module that has just exited adsorption. This process removes the residual waste gas in the module, preventing impurities from affecting the quality of the recovered carbon dioxide. Then, the device switches to the desorption process 16, where low-pressure steam is introduced to desorb the carbon dioxide originally adsorbed in the adsorption unit 13. The carbon dioxide is discharged with the steam flow and then condensed and separated to remove water, yielding the carbon dioxide product. This product can be further processed into a solid product for various industrial and civil applications, or for deep burial disposal. After desorption, the adsorbent is switched to cooling step 17 via a valve. Clean air is blown in to remove residual heat from the adsorbent, lowering its temperature and preventing high temperatures from affecting the adsorption efficiency in the next step. Finally, the adsorption process is switched to adsorption step 14, repeating the above steps continuously to achieve continuous adsorption-decarbonization and desorption.

[0040] This device can also be adapted to use other adsorption materials to make adsorption monomers for decarbonization or removal or separation of other components, such as using activated carbon materials to adsorb organic waste gas and recover organic matter.

[0041] The above description describes the preferred embodiments of the present invention and the technical principles applied thereto. For those skilled in the art, any obvious changes such as equivalent transformations or simple substitutions based on the technical solutions of the present invention, without departing from the spirit and scope of the present invention, shall fall within the protection scope of the present invention.

Claims

1. A carbon dioxide gas recovery device, comprising a plurality of adsorption modules disposed internally and an outer protective plate; characterized in that: The adsorption modules are assembled according to a certain pattern. The adsorption modules in the same column are arranged in the same direction, and the adsorption modules in adjacent columns are arranged in opposite directions. Through valve control, some adsorption modules are always in the adsorption state, while other adsorption modules are in the purging process and cooling process, and some adsorption modules are in the desorption state. The adsorption module consists of several assembled adsorption units and a housing; The housing includes an inlet static pressure chamber, an adsorption or desorption chamber, and an outlet gas collection chamber that are interconnected. The adsorption unit is located in the adsorption or desorption chamber. One end of the intake static pressure chamber is equipped with a carbon-containing mixed gas inlet and an automatic intake switching valve, while the other end is equipped with a desorption steam inlet pipe and a purge air inlet pipe. One end of the gas collection chamber is equipped with a desorbed carbon gas outlet pipe and a purge exhaust gas outlet pipe, while the other end is equipped with a decarbonized gas outlet and an automatic gas switching valve. The decarbonized gas outlet is oriented opposite to the carbon-containing mixed gas inlet.

2. The carbon dioxide gas recovery device according to claim 1, characterized in that: The adsorption unit is a honeycomb structure made of layered hydrotalcite or hydrotalcite precursor material.

3. The carbon dioxide gas recovery device according to claim 2, characterized in that: The cross-sectional dimensions of the honeycomb structure are 75-300mm in length and width, 500-2000mm in length, and the number of holes in a single cross-section is greater than or equal to 32.

4. The carbon dioxide gas recovery device according to claim 1, characterized in that: The dimensions of the adsorption module are 1 to 5 meters in length, width, and height.

5. The carbon dioxide gas recovery device according to claim 1, characterized in that: Automatic valves are installed on the desorption steam inlet pipe, the purge air inlet pipe, the desorption carbon gas outlet pipe, and the purge exhaust gas outlet pipe. The automatic valves are opened and closed by the control system.

6. The carbon dioxide gas recovery device according to claim 1, characterized in that: During operation, the carbon-containing mixed gas enters the intake static pressure chamber from the carbon-containing mixed gas inlet and flows evenly through the adsorption unit. The carbon dioxide in the mixed gas is selectively adsorbed and retained by the adsorption unit, and the waste gas is discharged through the exhaust gas collection chamber and the decarbonized gas outlet. After switching by valves, it enters the purging and desorption stages in sequence.

7. The carbon dioxide gas recovery device according to claim 6, characterized in that: During the purging process, the purging air inlet pipe and the purging exhaust gas outlet pipe valves are opened, while all other valves are closed. Clean air purges and discharges the residual exhaust gas inside the adsorption module, preventing it from affecting the quality of the desorbed and recovered carbon dioxide gas.

8. The carbon dioxide gas recovery device according to claim 7, characterized in that: After purging, the material enters the desorption process. The desorption steam inlet valve and the desorption carbon-rich gas outlet valve are opened, while all other valves are closed. Steam flows through the adsorbent material, and the carbon dioxide previously adsorbed in the honeycomb is desorbed. After being discharged with the desorption steam, the material undergoes condensation and gas-liquid separation. The steam is condensed into water and separated from the gas. The remaining gas is carbon dioxide, which can be compressed to make dry ice or further purified to make food-grade carbon dioxide products.

9. The carbon dioxide gas recovery device according to claim 8, characterized in that: After the desorption process, the system switches to the cooling process. The clean air inlet valve and the clean exhaust gas outlet valve are opened again, while all other valves are closed. Air is used to remove the residual heat from the adsorbent, reducing the temperature inside the module and preventing poor adsorption at high temperatures, which would reduce the carbon recovery rate. After the cooling process, the system switches to the next adsorption process, and this cycle continues.

10. The carbon dioxide gas recovery device according to claim 1, characterized in that: Based on the flow rate of carbon-containing waste gas to be treated, at least two adsorption modules are assembled to form a carbon dioxide recovery device; during assembly, the adsorption modules in a single row are arranged horizontally in the same direction, while adjacent rows are arranged in opposite directions to facilitate pipe connection; there is a steel structure between the adsorption modules to support and fix the modules.

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