Test apparatus for carbon capture membrane modules

Abstract

This application relates to a testing apparatus for a carbon capture membrane module, comprising: a gas distribution unit; a primary membrane separation unit including a first pretreatment module, a first membrane module, and a first return pipeline; a secondary membrane separation unit including a second pretreatment module, a second membrane module, and a second return pipeline; a detection unit; and a control unit. The control unit is used to adjust the pretreatment parameters of the first and second pretreatment modules based on data collected by the detection unit, and to obtain curves showing the changes in carbon capture performance parameters of the first and second membrane modules as a function of the pretreatment parameters. This carbon capture membrane module testing apparatus enables performance evaluation of the carbon capture membrane module under various operating conditions, improves testing flexibility and data comprehensiveness, and is compatible with performance comparisons of different types of membrane modules, as well as the verification and optimization of complex processes.

Description

Technical Field

[0001] This application relates to the technical field of carbon dioxide membrane separation for capture, and in particular to a testing apparatus for a carbon capture membrane module. Background Technology

[0002] With the increasingly severe global climate change problem, controlling greenhouse gas emissions, especially carbon dioxide emissions, has become an international consensus. Post-combustion capture technology is one of the key technological pathways for carbon emission reduction from large stationary emission sources such as power plants and cement plants. Among various carbon capture technologies, membrane separation has advantages such as no phase change, simple process, small footprint, and environmental friendliness, and is considered a next-generation carbon capture technology with great development potential.

[0003] The core of membrane separation technology lies in the integration of high-performance separation membrane materials and efficient membrane processes. To promote the industrial application of membrane-based carbon capture technology, it is necessary to conduct systematic performance evaluation and process verification of newly developed membrane materials and the membrane modules they are made of. Most existing carbon capture membrane module testing devices are designed based on a single type of membrane module and specific operating conditions, and cannot be compatible with membrane modules of different types, configurations, or sizes. This makes it impossible to conduct fair and systematic comparative evaluations of multiple membrane technologies on the same platform. Summary of the Invention

[0004] Therefore, it is necessary to provide a testing device for carbon capture membrane modules to address the problem of poor compatibility of existing testing devices.

[0005] A testing device for a carbon capture membrane module includes: a gas distribution unit for configuring and outputting simulated flue gas; a primary membrane separation unit including a first pretreatment module, a first membrane module, and a first return pipeline, wherein the simulated flue gas is pretreated by the first pretreatment module and then enters the first membrane module for initial separation to generate primary permeate gas and primary retained gas, the primary retained gas being returned to the gas distribution unit via the first return pipeline; and a secondary membrane separation unit, which can be selectively connected in series or in parallel with the primary membrane separation unit; the secondary membrane separation unit includes a second pretreatment module, a second membrane module, and a second return pipeline, wherein the primary permeate gas is pretreated by the second pretreatment module and then enters the second membrane module for secondary separation to generate primary permeate gas and primary retained gas. The system generates a secondary permeate gas and a secondary retainer gas, with the secondary retainer gas returning to the gas distribution unit via a second reflux pipeline; a detection unit is used to collect the pretreatment parameters of the first and second pretreatment modules, as well as the carbon capture performance parameters of the first and second membrane modules; a control unit is electrically connected to the gas distribution unit, the primary membrane separation unit, the secondary membrane separation unit, and the detection unit, respectively; wherein, the control unit is used to adjust the pretreatment parameters of the first and second pretreatment modules according to the data collected by the detection unit, and to obtain the curves showing the changes in the carbon capture performance parameters of the first and second membrane modules as the pretreatment parameters change.

[0006] The aforementioned carbon capture membrane module testing device can adjust the pretreatment parameters of the first and second pretreatment modules based on the data collected by the detection unit, and obtain the curves showing how the carbon capture performance parameters of the first and second membrane modules change with the pretreatment parameters. This enables performance evaluation of the carbon capture membrane module under various operating conditions, improves the flexibility and comprehensiveness of the test, and is compatible with performance comparisons of different types of membrane modules, verification and optimization of complex processes. It provides a reliable testing platform for membrane material screening, process optimization and system integration.

[0007] In some embodiments, the carbon capture performance parameters include the carbon capture rate of each stage of the membrane module and the concentration of carbon dioxide in the product gas, which includes the primary permeate gas and / or the secondary permeate gas.

[0008] In some embodiments, the pretreatment parameters include the boost pressure, heating temperature, relative humidity, and gas flow rate of each pretreatment module.

[0009] In some embodiments, the first pretreatment module includes a first input pipeline and a first compressor, a first heater, a first humidifier, and a first buffer tank disposed on the first input pipeline. The first input pipeline is connected between the gas distribution unit and the gas inlet side of the first membrane assembly. The first compressor is used to pressurize the gas, the first heater is used to regulate the gas temperature, the first humidifier is used to regulate the relative humidity of the gas, and the first buffer tank is used to stabilize the gas flow rate and pressure fluctuations.

[0010] In some embodiments, the second pretreatment module includes a second input pipeline and a second compressor, a second heater, a second humidification tank, and a second buffer tank disposed on the second input pipeline. The second input pipeline is connected between the permeation side of the first membrane module and the gas inlet side of the second membrane module. The second compressor is used to pressurize the gas, the second heater is used to regulate the gas temperature, the second humidification tank is used to regulate the relative humidity of the gas, and the second buffer tank is used to stabilize the gas flow rate and pressure fluctuations.

[0011] In some embodiments, the primary membrane separation unit further includes a first vacuum pump, which is located downstream of the first membrane module and is used to generate a negative pressure driving force on the permeate side of the first membrane module; the secondary membrane separation unit further includes a second vacuum pump, which is located downstream of the second membrane module and is used to generate a negative pressure driving force on the permeate side of the second membrane module; the control unit is electrically connected to the first vacuum pump and the second vacuum pump, and is used to adjust the suction parameters of the first vacuum pump and the second vacuum pump according to the data collected by the detection unit.

[0012] In some embodiments, the control unit is further configured to provide different test operation modes for the first membrane module and the second membrane module by adjusting the operating states of the gas distribution unit, the primary membrane separation unit, and the secondary membrane separation unit; the test operation modes include single-stage separation mode, two-stage separation mode, compression and compression-driven mode, compression and vacuum-driven mode, vacuum and compression-driven mode, and vacuum and vacuum-driven mode; in the compression and compression-driven mode, the permeate side of the first membrane module and the second membrane module is at atmospheric pressure or slightly positive pressure; in the compression and vacuum-driven mode, the vacuum and compression-driven mode, and the vacuum and vacuum-driven mode, the first vacuum pump and the second vacuum pump create negative pressure on the permeate side of the corresponding membrane module.

[0013] In some embodiments, the detection unit includes a pressure sensor, a temperature sensor, a humidity sensor, a flow meter, and a gas analyzer disposed in the pipelines of each stage of the membrane separation unit; the pressure sensor is used to detect gas pressure, the temperature sensor is used to detect gas temperature, the humidity sensor is used to detect the relative humidity of the gas, the flow meter is used to measure gas flow rate, and the gas analyzer is used to determine the concentration of carbon dioxide in the product gas, wherein the product gas includes the primary permeate gas and / or the secondary permeate gas.

[0014] In some embodiments, both the first membrane module and the second membrane module include an inlet port, a permeate outlet, and a retention outlet; the inlet port, the permeate outlet, and the retention outlet are all configured as flange interfaces.

[0015] In some embodiments, the gas distribution unit includes a carbon dioxide source, a nitrogen source, an oxygen source, and a mixing tank, wherein the mixing tank is used to prepare the simulated flue gas with a carbon dioxide concentration of 5 vol% to 20 vol%. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the gas distribution unit and the primary membrane separation unit in the test apparatus of the carbon capture membrane assembly in some embodiments of this application.

[0017] Figure 2 This is a schematic diagram showing the gas distribution unit, the primary membrane separation unit, and the secondary membrane separation unit connected in series in the test device of the carbon capture membrane module in some embodiments of this application.

[0018] Figure label:

[0019] 100. Gas distribution unit; 110. Carbon dioxide gas source; 120. Nitrogen gas source; 130. Oxygen gas source; 140. Mixing tank;

[0020] 200. Primary membrane separation unit; 210. First pretreatment module; 211. First input pipeline; 212. First compressor; 213. First heater; 214. First humidification tank; 215. First buffer tank; 220. First membrane module; 230. First reflux pipeline; 240. First vacuum pump;

[0021] 300, Secondary membrane separation unit; 310, Second pretreatment module; 311, Second input pipeline; 312, Second compressor; 313, Second heater; 314, Second humidification tank; 315, Second buffer tank; 320, Second membrane module; 330, Second reflux pipeline; 340, Second vacuum pump. Detailed Implementation

[0022] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0023] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this application, unless otherwise expressly specified and limited, the terms "initial," "connected," "linked," and "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0028] Please refer to Figure 1 and Figure 2 In one embodiment, the testing device for the carbon capture membrane module includes a gas distribution unit 100, a primary membrane separation unit 200, a secondary membrane separation unit 300, a detection unit, and a control unit. The gas distribution unit 100 is used to configure and output simulated flue gas. The primary membrane separation unit 200 includes a first pretreatment module 210, a first membrane module 220, and a first return pipeline 230. The simulated flue gas is pretreated by the first pretreatment module 210 and then enters the first membrane module 220 for initial separation, generating primary permeate gas and primary intercepted gas. The primary intercepted gas is returned to the gas distribution unit 100 via the first return pipeline 230. The secondary membrane separation unit 300 can be selectively connected in series or in parallel with the primary membrane separation unit 200. The secondary membrane separation unit 300 includes a second pretreatment module 310, a second membrane module 320, and a second return pipeline 330. The primary permeate gas... After pretreatment by the second pretreatment module 310, the gas enters the second membrane module 320 for secondary separation, generating secondary permeate gas and secondary retrieval gas. The secondary retrieval gas is returned to the gas distribution unit 100 via the second return pipeline 330. The detection unit is used to collect the pretreatment parameters of the first pretreatment module 210 and the second pretreatment module 310, as well as the carbon capture performance parameters of the first membrane module 220 and the second membrane module 320. The control unit is electrically connected to the gas distribution unit 100, the primary membrane separation unit 200, the secondary membrane separation unit 300, and the detection unit, respectively. The control unit is used to adjust the pretreatment parameters of the first pretreatment module 210 and the second pretreatment module 310 according to the data collected by the detection unit, and to obtain the curves of the carbon capture performance parameters of the first membrane module 220 and the second membrane module 320 changing with the pretreatment parameters.

[0029] Understandably, the simulated flue gas, after being pretreated by the first pretreatment module 210, enters the first membrane module 220 for initial separation, generating primary permeate gas and primary intercepted gas. The primary permeate gas, after being pretreated by the second pretreatment module 310, enters the second membrane module 320 for secondary separation, generating secondary permeate gas and secondary intercepted gas. Both the primary and secondary intercepted gas are returned to the gas distribution unit 100. Based on the data collected by the detection unit, the pretreatment parameters of the first pretreatment module 210 and the second pretreatment module 310 can be adjusted, and the curves showing the changes in carbon capture performance parameters of the first membrane module 220 and the second membrane module 320 with the changes in pretreatment parameters can be obtained, thereby determining the optimal process parameter range for each membrane module.

[0030] The aforementioned testing device for carbon capture membrane modules can adjust the pretreatment parameters of the first pretreatment module 210 and the second pretreatment module 310 based on the data collected by the detection unit, and obtain the curves showing the changes in the carbon capture performance parameters of the first membrane module 220 and the second membrane module 320 as the pretreatment parameters change. This enables performance evaluation of the carbon capture membrane modules under various operating conditions, improves the flexibility of testing and the comprehensiveness of data, and is compatible with performance comparisons of different types of membrane modules, verification and optimization of complex processes. It provides a reliable testing platform for membrane material screening, process optimization and system integration.

[0031] In the embodiments of this application, the gas distribution unit 100 is used to configure and output simulated flue gas with a preset carbon dioxide concentration. The gas distribution unit 100 adjusts the flow rate ratio of each gas source to prepare simulated flue gas with a carbon dioxide volume concentration that meets the test requirements, so as to simulate the composition of real industrial emission gas, thereby providing feeding conditions that are close to actual working conditions for the testing of membrane modules.

[0032] In the embodiments of this application, the secondary membrane separation unit 300 can be selectively connected in series or in parallel with the primary membrane separation unit 200. When the secondary membrane separation unit 300 is connected in series with the primary membrane separation unit 200, the primary permeate gas serves as the feed gas source for the secondary membrane separation unit 300, achieving continuous separation in two stages. When the secondary membrane separation unit 300 is connected in parallel with the primary membrane separation unit 200, the gas distribution unit 100 can simultaneously supply gas to the first membrane module 220 and the second membrane module 320, which can be used to compare the performance of different membrane modules under the same operating conditions, or to conduct switching tests between single-stage and multi-stage separation processes.

[0033] In the embodiments of this application, the detection unit is used to acquire key parameters in pipelines at all levels with high precision, so that the test data has high reliability and repeatability. For example, the detection unit includes multiple detection elements for real-time monitoring of the physical and chemical properties of the gas at each processing stage, so as to support dynamic adjustment of the operating status and performance evaluation.

[0034] In the embodiments of this application, the control unit is configured to adjust the operating parameters of each execution unit based on a preset algorithm or a user-defined test strategy, and to record the correlation between variables during the test in real time, thereby supporting system analysis of various operating conditions of the membrane module. The control unit may be a controller integrating a data processing module and a human-machine interface, capable of receiving real-time signals from the detection unit and dynamically adjusting the gas ratio of the gas distribution unit 100 and the operating parameters of the pretreatment module accordingly.

[0035] For details, please refer to Figure 1 and Figure 2 Carbon capture performance parameters include the carbon capture rate of each membrane module and the concentration of carbon dioxide in the product gas, which includes primary permeate and / or secondary permeate.

[0036] It should be noted that the carbon capture rate, also known as the carbon dioxide recovery efficiency, is calculated as the ratio of the molar flow rate of carbon dioxide in the permeate to the molar flow rate of carbon dioxide in the feed gas. The concentration of carbon dioxide in the product gas, i.e., the volume fraction of carbon dioxide in the permeate, is used to measure the membrane module's ability to enrich carbon dioxide. The higher this concentration, the stronger the selectivity of the membrane module, and the more significant the purification effect on carbon dioxide during the separation process.

[0037] The beneficial effect here is that by defining the carbon capture performance parameters, the separation efficiency and enrichment capacity of the membrane module for carbon dioxide can be accurately reflected, providing a quantitative basis for the applicability of the membrane module and the optimization of process parameters.

[0038] For more specific details, please refer to Figure 1 and Figure 2 The pretreatment parameters include the boost pressure, heating temperature, relative humidity, and gas flow rate of each pretreatment module.

[0039] The beneficial effect here is that by limiting the pretreatment parameters, the physical state of the gas can be controlled, thereby simulating the test environment of the membrane module under different operating conditions, and providing repeatable and controllable experimental conditions for the performance comparison test of the membrane module.

[0040] For a specific embodiment, please refer to Figure 1 and Figure 2 The first pretreatment module 210 includes a first input pipe 211 and a first compressor 212, a first heater 213, a first humidifier tank 214 and a first buffer tank 215 disposed on the first input pipe 211. The first input pipe 211 is connected between the gas distribution unit 100 and the air inlet side of the first membrane module 220. The first compressor 212 is used to pressurize the gas, the first heater 213 is used to regulate the gas temperature, the first humidifier tank 214 is used to regulate the relative humidity of the gas, and the first buffer tank 215 is used to stabilize the gas flow rate and pressure fluctuations.

[0041] The beneficial effects here are: by setting the first compressor 212, the first heater 213, the first humidification tank 214 and the first buffer tank 215, the simulated flue gas entering the first membrane module 220 can be precisely pressurized, heated, humidified and stabilized, thereby ensuring that the gas reaches the set physical state before entering the membrane module, and improving the stability of the test process and the consistency of the data.

[0042] In the embodiments of this application, the first input pipe 211 is connected between the gas distribution unit 100 and the gas inlet side of the first membrane module 220. The first input pipe 211 is provided with multiple interfaces for connecting various sensors in the detection unit to acquire real-time data on the pressure, temperature, humidity, and flow rate of the gas before it enters the first membrane module 220. The first input pipe 211 is made of a corrosion-resistant and low-adsorption material to avoid loss or contamination of gas components during transportation and to ensure the accuracy of the test results.

[0043] In the embodiments of this application, the first compressor 212, the first heater 213, the first humidification tank 214, and the first buffer tank 215 are all disposed on the first input pipeline 211. The first compressor 212, the first heater 213, the first humidification tank 214, and the first buffer tank 215 can be arranged sequentially, or their relative positions can be adjusted according to process requirements to optimize the gas pretreatment effect. For example, under certain operating conditions, humidifying before heating can avoid water vapor condensation, while in other scenarios, heating before humidifying helps to improve the response speed of humidity control.

[0044] For a specific embodiment, please refer to Figure 1 and Figure 2 The second pretreatment module 310 includes a second input pipe 311 and a second compressor 312, a second heater 313, a second humidification tank 314, and a second buffer tank 315 disposed on the second input pipe 311. The second input pipe 311 is connected between the permeation side of the first membrane module 220 and the gas inlet side of the second membrane module 320. The second compressor 312 is used to pressurize the gas, the second heater 313 is used to regulate the gas temperature, the second humidification tank 314 is used to regulate the relative humidity of the gas, and the second buffer tank 315 is used to stabilize the gas flow rate and pressure fluctuations.

[0045] The beneficial effects here are: by setting up a second compressor 312, a second heater 313, a second humidification tank 314 and a second buffer tank 315, the simulated flue gas entering the second membrane module 320 can be precisely pressurized, heated, humidified and stabilized, thereby ensuring that the gas reaches the set physical state before entering the membrane module, and improving the stability of the test process and the consistency of the data.

[0046] In the embodiments of this application, the second input pipeline 311 is connected between the permeate side of the first membrane module 220 and the gas inlet side of the second membrane module 320. The second input pipeline 311 is provided with multiple interfaces for connecting various sensors in the detection unit to acquire real-time data on the pressure, temperature, humidity, and flow rate of the gas before it enters the second membrane module 320. The second input pipeline 311 is made of a corrosion-resistant and low-adsorption material to avoid loss or contamination of gas components during transportation and to ensure the accuracy of the test results.

[0047] In the embodiments of this application, the second compressor 312, the second heater 313, the second humidification tank 314, and the second buffer tank 315 are all disposed on the second input pipeline 311. The second compressor 312, the second heater 313, the second humidification tank 314, and the second buffer tank 315 can be arranged sequentially, or their relative positions can be adjusted according to process requirements to optimize the gas pretreatment effect. For example, under certain operating conditions, humidifying before heating can avoid water vapor condensation, while in other scenarios, heating before humidifying helps to improve the response speed of humidity control.

[0048] Please refer to Figure 1 and Figure 2 The primary membrane separation unit 200 further includes a first vacuum pump 240, which is located downstream of the first membrane module 220 and is used to generate a negative pressure driving force on the permeation side of the first membrane module 220; the secondary membrane separation unit 300 further includes a second vacuum pump 340, which is located downstream of the second membrane module 320 and is used to generate a negative pressure driving force on the permeation side of the second membrane module 320; the control unit is electrically connected to the first vacuum pump 240 and the second vacuum pump 340 and is used to adjust the suction parameters of the first vacuum pump 240 and the second vacuum pump 340 according to the data collected by the detection unit.

[0049] It is understandable that installing vacuum pumps on the permeate side of each membrane module can establish a transmembrane pressure difference, thereby enhancing the permeate driving force of carbon dioxide in each membrane module and improving membrane separation efficiency.

[0050] The beneficial effect here is that by adjusting the suction parameters of the vacuum pump, the transmembrane pressure difference can be dynamically controlled, thereby affecting the permeate flux and selectivity of the membrane module, providing a basis for studying the performance change law of the membrane module under different pressure difference conditions.

[0051] In embodiments of this application, the primary membrane separation unit 200 further includes a first vacuum pump 240, which is located on the permeate side of the first membrane module 220. The first vacuum pump 240 is used to extract permeate gas and maintain a negative pressure environment on that side, thereby forming a stable pressure gradient across the membrane and promoting the selective permeation of carbon dioxide. The pumping speed and ultimate vacuum of the first vacuum pump 240 can be adjusted according to testing requirements to match the permeation characteristics and process parameter requirements of different membrane materials.

[0052] In embodiments of this application, the secondary membrane separation unit 300 further includes a second vacuum pump 340, which is located on the permeate side of the second membrane module 320. The second vacuum pump 340 is used to extract permeate gas and maintain a negative pressure environment on that side, thereby forming a stable pressure gradient across the membrane and promoting the selective permeation of carbon dioxide. The pumping speed and ultimate vacuum of the second vacuum pump 340 can be adjusted according to testing requirements to match the permeation characteristics and process parameter requirements of different membrane materials.

[0053] Further, please refer to Figure 1 and Figure 2 The control unit is also configured to provide different test operation modes for the first membrane module 220 and the second membrane module 320 by adjusting the operating status of the gas distribution unit 100, the primary membrane separation unit 200, and the secondary membrane separation unit 300. The test operation modes include single-stage separation mode, two-stage separation mode, compression and compression drive mode, compression and vacuum drive mode, vacuum and compression drive mode, and vacuum and vacuum drive mode. In the compression and compression drive mode, the permeate side of the first membrane module 220 and the second membrane module 320 is at atmospheric pressure or slightly positive pressure. In the compression and vacuum drive mode, vacuum and compression drive mode, and vacuum and vacuum drive mode, the first vacuum pump 240 and the second vacuum pump 340 form negative pressure on the permeate side of the corresponding membrane module.

[0054] Understandably, in the compression and compression-driven mode, both the first membrane module 220 and the second membrane module 320 rely on the pressure difference provided by the compressor as the driving force to achieve carbon dioxide permeation separation; in the compression and vacuum-driven mode, the first membrane module 220 relies on the pressure difference provided by the compressor as the driving force, and the second membrane module 320 relies on the negative pressure formed by the vacuum pump on the permeation side as the driving force; in the vacuum and compression-driven mode, the first membrane module 220 is driven by the negative pressure provided by the vacuum pump, and the second membrane module 320 is driven by the pressure difference provided by the compressor; in the vacuum and vacuum-driven mode, both the first membrane module 220 and the second membrane module 320 rely on the corresponding vacuum pump to provide the negative pressure driving force.

[0055] The beneficial effects here are: by providing multiple test operation modes, it is possible to simulate the complex working conditions of multi-level coupled processes in actual engineering, which facilitates a comprehensive evaluation of the separation performance of membrane modules under different driving mechanisms, and provides support for the development of efficient and low-consumption carbon capture processes.

[0056] In the embodiments of this application, the control unit provides different test operation modes for the first membrane module 220 and the second membrane module 320 by adjusting the operating states of the gas distribution unit 100, the primary membrane separation unit 200, and the secondary membrane separation unit 300. This can be achieved in the following ways: for example, the control unit can start and stop the first compressor 212 and the second compressor 312, the first vacuum pump 240 and the second vacuum pump 340 respectively, and adjust their operating parameters to construct the required differential pressure conditions under different combinations. In addition, the control unit can automatically switch the operating mode according to the preset program and synchronously record the performance data under each mode to support a systematic comparative analysis of the membrane module separation efficiency, energy consumption level and stability under different driving methods.

[0057] Please refer to Figure 1 and Figure 2 The detection unit includes pressure sensors, temperature sensors, humidity sensors, flow meters, and gas analyzers installed in the pipelines of each stage of membrane separation units. The pressure sensors are used to detect gas pressure, the temperature sensors are used to detect gas temperature, the humidity sensors are used to detect the relative humidity of the gas, the flow meters are used to measure gas flow rate, and the gas analyzers are used to determine the concentration of carbon dioxide in the product gas, which includes primary permeate gas and / or secondary permeate gas.

[0058] The beneficial effects here are: by integrating a variety of high-precision detection elements, it is possible to comprehensively acquire the gas state parameters of each key node in the membrane separation process, providing basic data support for the accurate calculation of carbon capture rate and product gas concentration, while supporting real-time assessment of process controllability.

[0059] In the embodiments of this application, pressure sensors, temperature sensors, humidity sensors, flow meters, and gas analyzers are installed in the pipelines of each stage of the membrane separation unit. The installation locations can be the feed side, permeate side, and key nodes of the connecting pipelines at each stage of the membrane separation unit to ensure continuous monitoring of the gas state. For example, pressure sensors and temperature sensors are respectively installed on the inlet and permeate sides of the first membrane module 220 to obtain real-time data on transmembrane pressure and temperature differences. A humidity sensor and flow meter are arranged between the outlet of the first humidification tank 214 and the inlet of the second membrane module 320 to help accurately grasp the gas conditions entering the secondary separation unit. The gas analyzer is typically installed on the outlet pipelines of the first-stage and second-stage permeate gases to continuously measure the trend of carbon dioxide concentration changes.

[0060] Please refer to Figure 1 and Figure 2 Both the first membrane module 220 and the second membrane module 320 include an air inlet, a permeate outlet, and a retention outlet; the air inlet, permeate outlet, and retention outlet are all configured as flange interfaces.

[0061] It should be noted that the air inlet, permeate outlet, and interception outlet are all constructed with flange interfaces. When the first membrane module 220 and the second membrane module 320 need to be connected to other pipelines or equipment, they can be quickly connected through flanges to ensure sealing, which facilitates the quick connection and disassembly of the membrane modules.

[0062] The beneficial effects here are: the air inlet, permeate outlet, and interception outlet are all flange interfaces, which not only improves the assembly efficiency of the testing device, but also effectively avoids gas leakage problems caused by loose interfaces or poor sealing, and enhances the device's compatibility with different types of membrane modules.

[0063] In the embodiments of this application, the inlet, permeate outlet, and retention outlet are all flange interfaces, and their sealing surfaces can use metal gaskets or elastic sealing rings to adapt to the testing requirements of different pressure levels and gas media. The size of the flange interface should allow the testing device to be plug-and-play with the membrane module, thereby improving versatility and scalability. The number of inlet, permeate outlet, and retention outlet can be configured according to actual testing needs. For example, in a multi-channel parallel testing scenario, multiple permeate outlets can be set to collect permeate gas flow under different operating conditions, thereby improving testing efficiency and the accuracy of data comparison. In addition, the position layout of each interface is optimized to ensure that the gas flow path is short and smooth, reducing the interference of pressure drop loss and dead volume on the test results.

[0064] Please refer to Figure 1 and Figure 2 The gas distribution unit 100 includes a carbon dioxide gas source 110, a nitrogen gas source 120, an oxygen gas source 130, and a mixing tank 140. The mixing tank 140 is used to prepare simulated flue gas with a carbon dioxide concentration of 5 vol% to 20 vol%.

[0065] The beneficial effect here is that by configuring different proportions of carbon dioxide, nitrogen and oxygen, the composition of real flue gas can be accurately simulated, thereby reproducing the characteristics of industrial emission gases under test conditions and providing a reliable basis for the performance evaluation of membrane modules in practical application scenarios.

[0066] In the embodiments of this application, the mixing tank 140 is equipped with a stirring device or a static mixing structure to ensure uniform mixing of gas components and avoid local concentration deviations affecting the consistency of test results. In addition, the mixing tank 140 can be expanded to include other gas components, such as water vapor or trace impurity gases, according to test requirements, to further approximate flue gas conditions under complex working conditions.

[0067] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A testing device for a carbon capture membrane module, characterized in that, include: Gas distribution unit (100) is used to configure and output simulated flue gas; The primary membrane separation unit (200) includes a first pretreatment module (210), a first membrane module (220), and a first return pipeline (230). The simulated flue gas is pretreated by the first pretreatment module (210) and then enters the first membrane module (220) for initial separation to generate primary permeate gas and primary intercept gas. The primary intercept gas is returned to the gas distribution unit (100) through the first return pipeline (230). A secondary membrane separation unit (300) may be selectively connected in series or in parallel with the primary membrane separation unit (200); the secondary membrane separation unit (300) includes a second pretreatment module (310), a second membrane module (320) and a second reflux pipeline (330). The primary permeate gas is pretreated by the second pretreatment module (310) and then enters the second membrane module (320) for secondary separation to generate secondary permeate gas and secondary retained gas. The secondary retained gas is refluxed back to the gas distribution unit (100) through the second reflux pipeline (330). The detection unit is used to collect the pretreatment parameters of the first pretreatment module (210) and the second pretreatment module (310), as well as the carbon capture performance parameters of the first membrane module (220) and the second membrane module (320); The control unit is electrically connected to the gas distribution unit (100), the primary membrane separation unit (200), the secondary membrane separation unit (300), and the detection unit, respectively. The control unit is used to adjust the preprocessing parameters of the first preprocessing module (210) and the second preprocessing module (310) according to the data collected by the detection unit, and to obtain the curves of the carbon capture performance parameters of the first membrane module (220) and the second membrane module (320) as the preprocessing parameters change.

2. The testing apparatus for the carbon capture membrane module according to claim 1, characterized in that, The carbon capture performance parameters include the carbon capture rate of each stage of the membrane module and the concentration of carbon dioxide in the product gas, wherein the product gas includes the primary permeate gas and / or the secondary permeate gas.

3. The testing apparatus for the carbon capture membrane module according to claim 1, characterized in that, The pretreatment parameters include the boost pressure, heating temperature, relative humidity, and gas flow rate of each pretreatment module.

4. The testing apparatus for the carbon capture membrane module according to claim 3, characterized in that, The first pretreatment module (210) includes a first input pipeline (211) and a first compressor (212), a first heater (213), a first humidification tank (214) and a first buffer tank (215) disposed on the first input pipeline (211). The first input pipeline (211) is connected between the gas distribution unit (100) and the air inlet side of the first membrane module (220). The first compressor (212) is used to pressurize the gas, the first heater (213) is used to regulate the gas temperature, the first humidifier (214) is used to regulate the relative humidity of the gas, and the first buffer tank (215) is used to stabilize the gas flow rate and pressure fluctuations.

5. The testing apparatus for the carbon capture membrane module according to claim 3, characterized in that, The second pretreatment module (310) includes a second input pipeline (311) and a second compressor (312), a second heater (313), a second humidification tank (314) and a second buffer tank (315) disposed on the second input pipeline (311). The second input pipeline (311) is connected between the permeate side of the first membrane module (220) and the air inlet side of the second membrane module (320). The second compressor (312) is used to pressurize the gas, the second heater (313) is used to regulate the gas temperature, the second humidifier (314) is used to regulate the relative humidity of the gas, and the second buffer tank (315) is used to stabilize the gas flow rate and pressure fluctuations.

6. The testing apparatus for the carbon capture membrane module according to claim 3, characterized in that, The primary membrane separation unit (200) further includes a first vacuum pump (240), which is located downstream of the first membrane module (220) and is used to generate a negative pressure driving force on the permeate side of the first membrane module (220). The secondary membrane separation unit (300) further includes a second vacuum pump (340), which is located downstream of the second membrane module (320) and is used to generate a negative pressure driving force on the permeate side of the second membrane module (320). The control unit is electrically connected to the first vacuum pump (240) and the second vacuum pump (340), and is used to adjust the suction parameters of the first vacuum pump (240) and the second vacuum pump (340) according to the data collected by the detection unit.

7. The testing apparatus for the carbon capture membrane module according to claim 6, characterized in that, The control unit is also configured to provide different test operation modes for the first membrane module (220) and the second membrane module (320) by adjusting the operating states of the gas distribution unit (100), the primary membrane separation unit (200), and the secondary membrane separation unit (300); The test operation modes include single-stage separation mode, two-stage separation mode, compression and compression drive mode, compression and vacuum drive mode, vacuum and compression drive mode, and vacuum and vacuum drive mode. In the compression and compression drive mode, the permeation side of the first membrane module (220) and the second membrane module (320) are both at atmospheric pressure or slightly positive pressure; in the compression and vacuum drive mode, the vacuum and compression drive mode, and the vacuum and vacuum drive mode, the first vacuum pump (240) and the second vacuum pump (340) generate negative pressure on the permeation side of the corresponding membrane module.

8. The testing apparatus for the carbon capture membrane module according to claim 3, characterized in that, The detection unit includes pressure sensors, temperature sensors, humidity sensors, flow meters, and gas analyzers installed in the pipelines of each stage of the membrane separation unit; The pressure sensor is used to detect gas pressure, the temperature sensor is used to detect gas temperature, the humidity sensor is used to detect the relative humidity of the gas, the flow meter is used to measure gas flow rate, and the gas analyzer is used to determine the concentration of carbon dioxide in the product gas. The product gas includes the primary permeate gas and / or the secondary permeate gas.

9. The testing apparatus for the carbon capture membrane module according to claim 1, characterized in that, Both the first membrane module (220) and the second membrane module (320) include an air inlet, a permeate outlet, and a filtration outlet; The air inlet, the permeation outlet, and the interception outlet are all constructed with flange interfaces.

10. The testing apparatus for the carbon capture membrane module according to claim 1, characterized in that, The gas distribution unit (100) includes a carbon dioxide gas source (110), a nitrogen gas source (120), an oxygen gas source (130), and a mixing tank (140), wherein the mixing tank (140) is used to prepare the simulated flue gas with a carbon dioxide concentration of 5 vol% to 20 vol%.

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