An evaluation device and a test method for adsorption separation performance testing

Abstract

The present application relates to the field of adsorption separation, and provides an evaluation device and test method for adsorption separation performance testing. The evaluation device includes an adsorption component, a temperature control component, and an evaluation component. The adsorption component includes an adsorption container, an air inlet pipe, and an exhaust pipe. The adsorption container is formed with a purification chamber. The air inlet pipe and the exhaust pipe are both connected to the purification chamber. The purification chamber is used to accommodate adsorbents. The air inlet pipe is used to send raw gas into the purification chamber, and the exhaust pipe is used to discharge target gas. The temperature control component is used to adjust the temperature in the purification chamber. The evaluation component includes a processor, an analyzer, and a pressure detector. The analyzer is provided on the exhaust pipe to detect the purity of the target gas. The air inlet pipe is provided with a pressure detector. The processor is communicatively connected to the analyzer and the pressure detector. The evaluation device and test method for adsorption separation performance testing provided in the present application can obtain the adsorption separation performance of the adsorbent.

Description

Technical Field

[0001] The present application relates to the field of adsorption separation, and in particular to an evaluation device and a testing method for adsorption separation performance testing. Background Art

[0002] Adsorption separation occurs when a mobile phase of gas comes into contact with a porous solid phase, typically porous particles, that selectively adsorb one or more components of the mobile phase onto their inner or outer surfaces, achieving separation through differences in adsorption capacity. Because the application of low-temperature adsorption is in its early stages, research on this topic is limited, particularly regarding the measurement and evaluation of adsorption separation performance of adsorbents. Consequently, a method for evaluating adsorption separation performance is urgently needed. Summary of the Invention

[0003] In view of this, the embodiments of the present application hope to provide an evaluation device and a testing method for adsorption separation performance testing, which can obtain the adsorption separation performance of an adsorbent.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0005] The present application discloses, on one hand, an evaluation device for adsorption separation performance testing, comprising:

[0006] An adsorption assembly includes an adsorption container, an air inlet pipe, and an exhaust pipe. The adsorption container forms a purification chamber. The air inlet pipe and the exhaust pipe are both connected to the purification chamber. The purification chamber is used to accommodate an adsorbent. The air inlet pipe is used to deliver the raw gas into the purification chamber. The exhaust pipe is used to discharge the target gas.

[0007] a temperature control component, for adjusting the temperature in the purification chamber;

[0008] The evaluation component includes a processor, an analyzer and a pressure detector. The analyzer is arranged on the exhaust pipe to detect the purity of the target gas, the pressure detector is arranged on the intake pipe, and the processor is communicatively connected with the analyzer and the pressure detector.

[0009] In one embodiment, the temperature control component includes a shell, a refrigerant medium, a refrigerant filling pipe and a refrigerant discharge pipe. The shell forms a cavity, the adsorption container is arranged in the cavity, the refrigerant filling pipe and the refrigerant discharge pipe are both connected to the cavity, the refrigerant filling pipe is used to deliver the refrigerant medium into the cavity, and the refrigerant discharge pipe is used to discharge the vaporized refrigerant medium out of the cavity.

[0010] In one embodiment, the evaluation component includes a pressure sensor, which is communicatively connected to the processing instrument. The pressure sensor is provided in both the refrigerant filling pipe and the refrigerant discharge pipe.

[0011] In one embodiment, the bottom surface of the purification chamber is an arc surface with a lower middle and higher edges.

[0012] In one embodiment, the distance between the tail end of the air inlet duct in the purification chamber and the bottom surface of the purification chamber is greater than 0.

[0013] In one embodiment, the outer circumferential surface of the air intake duct is surrounded by the adsorbent, and a gap between the adsorbent and the outer circumferential surface of the air intake duct is smaller than a preset value.

[0014] Another aspect of the present application discloses a test method for adsorption performance testing, which is used for the above-mentioned evaluation device. The test method includes:

[0015] Under the condition that the temperature in the purification chamber is a preset temperature, adjusting the inlet pressure of the raw gas and detecting the purity of the target gas;

[0016] According to the corresponding purities at different intake pressures, a mapping relationship between the intake pressure of the raw gas and the purity is established.

[0017] In one embodiment, the temperature control assembly includes a housing, a refrigerant, a refrigerant filling pipe, and a refrigerant discharge pipe. The housing forms a cavity, the adsorption container is disposed in the cavity, the refrigerant filling pipe and the refrigerant discharge pipe are both connected to the cavity, the refrigerant filling pipe is used to deliver the refrigerant into the cavity, and the refrigerant discharge pipe is used to discharge the vaporized refrigerant out of the cavity. The testing method includes:

[0018] The flow rate of the refrigerant in the refrigerant filling pipe and the flow rate of the refrigerant in the refrigerant discharge pipe are adjusted so that the temperature in the purification chamber is the preset temperature.

[0019] In one embodiment, the testing method includes:

[0020] The corresponding refrigerant medium is selected according to the boiling point of the adsorbate.

[0021] In one embodiment, the feed gas includes carbon monoxide feed gas, hydrogen feed gas, oxygen feed gas or boron trifluoride feed gas, the adsorbent is sulfur dioxide, carbon dioxide or water, and the target gas is carbon monoxide, oxygen or boron trifluoride.

[0022] In one embodiment, the adsorbent is a combination of one or more of molecular sieves, activated carbon, metal organic framework materials and carbon nanotubes.

[0023] The embodiment of the present application discloses an evaluation device and a test method for adsorption separation performance testing. Through an adsorption component and a temperature control component, the raw gas containing the target gas can be separated and desorbed in advance before distillation. In this way, on the one hand, the purity of the target gas and the separation efficiency of the adsorbent can be improved; on the other hand, the situation in which the adsorbent blocks the pipeline in the distillation device can be avoided, thereby improving the separation efficiency and the service life of the distillation device. The inlet pressure of the raw gas in the inlet pipeline is obtained by a pressure detector, the purity of the target gas is obtained by an analyzer, and a processor is used to communicate with the analyzer and the pressure detector to correspond the inlet pressure to the purity of the target gas one by one, and establish an adsorption separation performance curve of the adsorbent of the raw gas at different inlet pressures. In this way, the inlet pressure of the target gas under the optimal adsorption separation performance can be obtained, providing data support for the subsequent engineering design of the adsorption separation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic structural diagram of an evaluation device for adsorption separation performance testing provided in one embodiment of the present application;

[0025] Figure 2 Another aspect of the present invention provides a flow chart of a test method for adsorption separation performance testing.

[0026] Reference numerals

[0027] Evaluation device 100; adsorption component 1; adsorption container 11; purification chamber 11a; container body 111; aggregate 112; air inlet pipe 12; exhaust pipe 13; adsorbent 14; first switch valve 15; second switch valve 16; third switch valve 17; temperature control component 2; housing 21; cavity 21a; refrigerant medium 22; refrigerant filling pipe 23; refrigerant discharge pipe 24; evaluation component 3; pressure detector 31; pressure sensor 32; temperature detector 33; first temperature detector 331; second temperature detector 332; third temperature detector 333; pressure detector 34; vacuum box 4; enclosed space 4a; vacuum pipe 5; fourth switch valve 6; pressure detection gauge 7. DETAILED DESCRIPTION

[0028] It should be noted that, unless there is a conflict, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of this application and should not be regarded as an improper restriction on this application.

[0029] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments. The descriptions of "first" and "second" in the embodiments of the present application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly including at least one feature.

[0030] On the one hand, the present invention provides an evaluation device for adsorption performance testing. Figure 1 The evaluation device 100 includes an adsorption component 1, a temperature control component 2, and an evaluation component 3. The adsorption component 1 includes an adsorption container 11, an air inlet pipe 12, and an exhaust pipe 13. The adsorption container 11 is formed with a purification chamber 11a. The air inlet pipe 12 and the exhaust pipe 13 are both connected to the purification chamber 11a. The purification chamber 11a is used to accommodate an adsorbent 14. The air inlet pipe 12 is used to deliver the raw gas into the purification chamber 11a, and the exhaust pipe 13 is used to discharge the target gas. The temperature control component 2 is used to adjust the temperature in the purification chamber 11a. The evaluation component 3 includes a processor, an analyzer, and a pressure detector 31. The analyzer is provided on the exhaust pipe 13 to detect the purity of the target gas. The pressure detector 31 is provided on the air inlet pipe 12. The processor is communicatively connected with the analyzer and the pressure detector 31.

[0031] This embodiment uses the adsorption component 1 and the temperature control component 2 to separate and desorb the adsorbate in the raw gas containing the target gas before distillation. This can, on the one hand, improve the purity of the target gas and the separation efficiency of the adsorbate; on the other hand, it can prevent the adsorbate from clogging the pipeline in the distillation device, thereby improving the separation efficiency and the service life of the distillation device. The inlet pressure of the raw gas in the inlet pipeline 12 is obtained by the pressure detector 31, and the purity of the target gas is obtained by the analyzer. A processor is used to communicate with the analyzer and the pressure detector 31 to correspond the inlet pressure to the purity of the target gas one-to-one, and establish an adsorption separation performance curve of the adsorbent 14 for the raw gas at different inlet pressures. In this way, the inlet pressure of the target gas under the optimal adsorption separation performance can be obtained, providing data support for the engineering design of the subsequent adsorption separation device.

[0032] It should be noted that the evaluation of separation performance is based on the degree of separation of the adsorbate between the inlet and outlet of the raw gas, or it can be based on the purity of the target gas between the inlet and outlet of the raw gas.

[0033] It should be noted that the adsorbate mentioned here refers to the impurity gas in the raw gas that can be adsorbed by the adsorbent 14.

[0034] For example, in one embodiment, an analyzer may also be provided in the air inlet pipe 12 to obtain the purity of the target gas before adsorption separation.

[0035] For example, in one embodiment, the communication connection mode between the processor and the analyzer and the pressure detector 31 can be a wireless mode such as WIFI (Wireless Fidelity) or Bluetooth, or a wired mode such as a network cable.

[0036] In one embodiment, please refer to Figure 1 The temperature control assembly 2 includes a housing 21, a refrigerant 22, a refrigerant filling pipe 23, and a refrigerant discharge pipe 24. The housing 21 defines a cavity 21a, within which the adsorption container 11 is disposed. The refrigerant filling pipe 23 and the refrigerant discharge pipe 24 are both connected to the cavity 21a. The refrigerant filling pipe 23 is used to deliver the refrigerant 22 into the cavity 21a, while the refrigerant discharge pipe 24 is used to discharge the vaporized refrigerant 22 out of the cavity 21a. This ensures safe transportation of the refrigerant 22 and facilitates control of parameters such as the flow rate, flow velocity, and pressure of the refrigerant 22. Here, by setting a refrigerant 22 in the cavity 21a, the refrigerant 22 absorbs heat by evaporation and takes away the heat in the purification chamber 11a to achieve a cooling effect. In this way, when the temperature drops to the boiling point of the adsorbent, the adsorbent will liquefy and fall to the bottom of the purification chamber 11a or be absorbed by the adsorbent 14. In this way, the adsorbent in the raw gas can be separated from the target gas, achieving a purification effect.

[0037] It should be noted that impurity gases with higher boiling points have larger adsorption capacity. Impurity gases with higher boiling points are easier to liquefy. Liquids are more easily adsorbed by the adsorbent 14 than gases, so the adsorption capacity is greater. For example, the boiling point of CO2 is -78.5°C, and the boiling point of O2 is -183°C. When the temperature drops to -80°C, CO2 has been liquefied and is easily adsorbed.

[0038] For example, in one embodiment, please refer to Figure 1The evaluation component 3 includes a pressure sensor 32, which is communicatively connected to the processor. Pressure sensors 32 are provided in the refrigerant filling pipe 23 and the refrigerant discharge pipe 24. Exemplarily, the adsorption component 1 includes a first switch valve 15 and a second switch valve 16, which are both communicatively connected to the processor. The first switch valve 15 is provided on the air intake pipe 12 and can selectively open or close the air intake pipe 12 to control the feed amount of the raw gas. The second switch valve 16 is provided in the refrigerant filling pipe 23 and the refrigerant discharge pipe 24, respectively, to control the liquid intake amount of the refrigerant medium 22 and the exhaust amount of the vaporized refrigerant medium 22. In this way, the intake pressure can be controlled by adjusting the first switch valve 15. The processor adjusts the second switch valve 16 according to the intake pressure to adjust the liquid intake amount in the refrigerant filling pipe 23 and the exhaust amount in the refrigerant discharge pipe 24. In order to achieve the purpose of regulating the pressure in the refrigerant filling pipe 23 and the pressure in the refrigerant discharge pipe 24, the liquid level of the refrigerant medium 22 in the purification chamber 11a can be precisely controlled. On the one hand, the temperature in the purification chamber 11a can be made to reach the boiling point of the adsorbent to achieve the separation effect. In this way, the temperature in the purification chamber 11a under different inlet pressures can be adaptively adjusted to achieve different degrees of separation of the adsorbent, with a high degree of automation. On the other hand, by precisely controlling the liquid level of the refrigerant medium 22, the separation of the adsorbent and the target gas can be effectively achieved under harsh separation temperature conditions, for example, when the separation temperature is particularly low such as -190°C and the boiling points of the adsorbent and the target gas are close.

[0039] It should be noted that the feed rate, liquid feed rate and exhaust rate are all related to their corresponding pressures. If the feed rate of the raw gas increases, the intake pressure of the intake pipe 12 will also increase.

[0040] For example, in one embodiment, please refer to Figure 1 The adsorption component 1 includes a third switch valve 17, and the evaluation component 3 includes a pressure detector 34. The third switch valve 17 and the pressure detector 34 are both arranged on the exhaust pipe 13. The third switch valve 17 is used to open or close the exhaust pipe 13 to control the emission amount of the target gas. The pressure detector 34 is used to detect the emission pressure of the target gas in the exhaust pipe 13.

[0041] For example, in one embodiment, by continuously adjusting the intake pressure and the adaptive temperature regulation of the refrigerant 22, a set of matching parameters of the intake pressure of the raw gas and the inlet and outlet pressures, liquid intake volume and exhaust volume of the refrigerant 22 under optimal adsorption separation performance can be obtained, providing important support for the tolerance design and engineering of adsorption separation.

[0042] In one embodiment, please refer to Figure 1The evaluation component 3 includes a temperature detector 33. The air intake pipe 12, the refrigerant filling pipe 23, and the refrigerant discharge pipe 24 are all provided with a temperature detector 33. The temperature detector 33 is communicatively connected to the processor. For example, there can be three temperature detectors 33, namely a first temperature detector 331, a second temperature detector 332, and a third temperature detector 333. The first temperature detector 331 is provided at a portion of the air intake pipe 12 located within the purification chamber 11a, and is used to detect the temperature within the purification chamber 11a and the temperature within the air intake pipe 12. The second temperature detector 332 is provided at a portion of the refrigerant filling pipe 23 located outside the cavity 21a, and is used to detect the temperature of the refrigerant medium 22. The third temperature detector 333 is provided at a portion of the refrigerant discharge pipe 24 located outside the cavity 21a. It is used to detect the temperature of the refrigerant 22 after vaporization. Through the temperature detection of the three, and then controlling the second switch valve 16 to adjust the liquid inlet and exhaust volume of the refrigerant 22, it can ensure that the temperature in the purification chamber 11a is between the boiling point of the target gas and the boiling point of the adsorbent, so that the target gas and the adsorbent are separated to achieve the purification effect. The separation target is accurate and the efficiency is high. In this way, the parameters matching the different inlet pressures of the raw gas and the inlet and outlet temperatures of the refrigerant 22 can be obtained, which further expands the database for adsorption separation performance evaluation and provides important support for the engineering design and engineering of adsorption separation.

[0043] In one embodiment, please refer to Figure 1 The bottom surface of the purification chamber 11a is an arc-shaped surface with a lower center and higher edges. Exemplarily, the adsorption container 11 includes a container body 111 and an aggregate 112. The lower portion of the container body 111 is open, and the aggregate 112 seals the lower opening of the container body 111, thereby defining the purification chamber 11a. The bottom surface of the purification chamber 11a is located on the aggregate 112. The cross-sectional area of the aggregate 112, perpendicular to the vertical direction, gradually decreases along the vertical direction. In this way, when the adsorbate liquefies or solidifies, it can be directed to the bottom of the purification chamber 11a, avoiding clogging the tail end of the intake pipe 12.

[0044] For example, in one embodiment, the shape of the container body 111 is not limited, for example, it can be a cylinder, etc.; the shape of the polymer body is also not limited, for example, it can be a hemisphere, a cone or other irregular shapes.

[0045] For example, in one embodiment, the lower end of the adsorption container 11 may be designed as a head.

[0046] In one embodiment, please refer to Figure 1The distance between the tail end of the air inlet pipe 12 in the purification chamber 11a and the bottom surface of the purification chamber 11a is greater than 0. Thus, raising the tail end of the air inlet pipe 12 a certain distance above the bottom surface of the purification chamber 11a can, on the one hand, prevent condensation and blockage of the feed gas at the tail end under extreme conditions, such as extremely low temperatures; and, on the other hand, prevent liquefied liquid or solidified solids of the adsorbate at the bottom of the purification chamber 11a from accumulating downward and blocking the tail end of the air inlet pipe 12 after a certain period of operation.

[0047] It should be noted that the closer to the wall surface of the adsorption container 11, the lower the temperature.

[0048] In one embodiment, please refer to Figure 1 The outer circumference of the intake pipe 12 is surrounded by the adsorbent 14, and the gap between the adsorbent 14 and the outer circumference of the intake pipe 12 is less than a preset value. For example, the shape of the adsorbent 14 is not limited, and the size of the preset value is specifically based on the shape of the adsorbent 14. For example, when the adsorbent 14 is granular, the preset value may be 0, i.e., there is no gap between the adsorbent 14 and the outer circumference of the intake pipe 12. When the adsorbent 14 is a regular shape, such as a cuboid or a sphere, the preset value may be 0.3 nm or 0.5 nm. This prevents the adsorbate in the feed gas from escaping through the gap, thereby improving the purity of the target gas.

[0049] In one embodiment, please refer to Figure 1 Evaluation device 100 includes a vacuum chamber 4 and a vacuum pump. Vacuum chamber 4 defines a sealed space 4a, and housing 21 is disposed within sealed space 4a. The vacuum pump is used to evacuate sealed space 4a. This prevents significant energy loss from the refrigerant 22 being transferred to the environment outside vacuum chamber 4, thereby effectively maintaining a low temperature.

[0050] For example, in one embodiment, a reflective film may be mounted on the inner wall and / or outer wall of the vacuum box 4 , thereby further reducing the energy transfer of the cold medium 22 to the outside and further improving the low temperature maintenance effect.

[0051] For example, in one embodiment, please refer to Figure 1 Evaluation device 100 includes a vacuum pipe 5, a fourth on-off valve 6, and a pressure gauge 7. The vacuum pipe 5 communicates with the sealed space 4a. Both the fourth on-off valve 6 and the pressure gauge 7 are mounted on the vacuum pipe 5. The fourth on-off valve 6 is used to control the opening and closing of the vacuum pipe 5. The pressure gauge 7 is used to monitor the pressure within the vacuum pipe 5. A vacuum pump is connected to the end of the vacuum pipe 5 remote from the vacuum chamber 4 to evacuate the sealed space. In some embodiments, the fourth on-off valve 6, the pressure gauge 7, and the vacuum pump can all be connected to a processor for automatic control, resulting in a high degree of automation.

[0052] Another aspect of the present invention provides a method for testing adsorption performance. Figure 2 , used for the above-mentioned evaluation device 100, the testing method includes:

[0053] S1. Under the condition that the temperature in the purification chamber is a preset temperature, the inlet pressure of the raw gas is adjusted, and the purity of the target gas is detected.

[0054] For example, the temperature in the purification chamber 11a can be adjusted to a preset temperature through the temperature control component 2, and then the intake pressure of the raw gas can be adjusted through the first switch valve 15 and the pressure detector 31, and finally the purity of the target gas can be measured by the analyzer on the exhaust pipe 13.

[0055] S2. Establish a mapping relationship between the intake pressure and the purity of the raw gas according to the purity corresponding to different intake pressures.

[0056] In this embodiment, the intake pressure of the raw gas is first adjusted under the condition that the temperature in the purification chamber 11a is a preset temperature, and the purity of the target gas is detected. Then, a mapping relationship between the intake pressure and purity of the raw gas is established according to the corresponding purity under different intake pressures, so as to correspond the intake pressure to the purity of the target gas one-to-one, thereby establishing a separation performance curve of the adsorbent 14 of the raw gas under different intake pressures. In this way, the intake pressure of the target gas with the optimal separation performance can be obtained, providing data support for the subsequent engineering design of the adsorption separation device.

[0057] In one embodiment, please refer to Figure 1 The temperature control component 2 includes a shell 21, a refrigerant 22, a refrigerant filling pipe 23 and a refrigerant discharge pipe 24. The shell 21 forms a cavity 21a. The adsorption container 11 is disposed in the cavity 21a. The refrigerant filling pipe 23 and the refrigerant discharge pipe 24 are both connected to the cavity 21a. The refrigerant filling pipe 23 is used to deliver the refrigerant 22 into the cavity 21a. The refrigerant discharge pipe 24 is used to discharge the vaporized refrigerant 22 out of the cavity 21a. The test method includes:

[0058] S3. Adjust the flow rate of the refrigerant in the refrigerant filling pipe and the flow rate of the refrigerant in the refrigerant discharge pipe so that the temperature in the purification chamber is the preset temperature.

[0059] In this way, by adjusting the liquid inlet volume in the refrigerant filling pipe 23 and the exhaust volume in the refrigerant discharge pipe 24, the liquid level of the refrigerant medium 22 in the purification chamber 11a can reach a preset liquid level, so that the temperature in the purification chamber 11a reaches a preset temperature such as the boiling point of the adsorbent. On the one hand, the separation of the target gas and the adsorbent can be achieved with high separation efficiency; on the other hand, the waste of energy of the refrigerant medium 22 can be avoided, and the economy is good.

[0060] In one embodiment, the testing method includes selecting a corresponding refrigerant 22 based on the boiling point of the adsorbate. By selecting the corresponding refrigerant 22, the adsorbate can be liquefied relatively quickly at the temperature of the vaporized refrigerant 22, thereby achieving the purpose of separating the target gas and the adsorbate. Specifically, the boiling point of the refrigerant 22 is lower than that of the adsorbate. Thus, the heat absorbed by the vaporized refrigerant 22 can lower the temperature within the purification chamber 11a to below the boiling point of the adsorbate, thereby liquefying it.

[0061] In one embodiment, the raw gas includes carbon monoxide (CO) raw gas, hydrogen (H2) raw gas, oxygen (O2) raw gas or boron trifluoride (BF3) raw gas. In this way, by testing them one by one, the relationship between the inlet pressure of different raw materials and the purity of their corresponding target gases can be obtained to expand the database of adsorption separation performance. The adsorbent is carbon dioxide (H2) or water (H2O), and the target gas is carbon monoxide (CO), hydrogen (H2), oxygen (O2) or boron trifluoride (BF3). In this way, each raw gas is subjected to the above-mentioned test method steps, and the adsorption separation performance parameters of the composition and purity of different adsorbents in each raw gas can be obtained, providing important support for the engineering design and engineering of adsorption separation.

[0062] In one embodiment, the adsorbent 14 is one or a combination of molecular sieves, activated carbon, metal-organic frameworks, and carbon nanotubes. By subjecting each adsorbent 14 to the aforementioned testing method and steps, data on the adsorption and separation performance of different adsorbents 14 for various feed gases can be obtained, thereby expanding the adsorption and separation performance database and providing data support for the engineering design of adsorption and separation devices.

[0063] For example, in one embodiment, using BF3 feed gas as an example, the purity of the target gas, i.e., BF3 gas, in the BF3 feed gas before adsorption separation is 99.5%. The adsorbates to be evaluated are primarily SO2, CO2, and H2O. Possible adsorbents 14 include 5A molecular sieve, coconut shell activated carbon, metal-organic framework materials, and carbon nanotubes. Liquid nitrogen is used as the refrigerant 22 because the boiling points of SO2, CO2, and N2 are -195.86°C, respectively. Taking the adsorption and separation performance of 5A molecular sieve as an example: 5A molecular sieve is filled into the purification chamber 11a, and liquid nitrogen is introduced into the chamber 21a through the refrigerant filling pipe 23 to a preset liquid level. Because the boiling point of BF3 is -101.15 degrees Celsius, the liquid level and amount of liquid nitrogen must be precisely controlled to prevent BF3 from condensing and blocking the inlet pipe 12. Subsequently, the adsorption and separation performance curve of an adsorbate, such as CO2, is obtained under inlet pressures between 0.1 MPa and 1.0 MPa, and the BF3 inlet pressure at which the optimal adsorption and separation performance is achieved is determined. Following the above steps, the adsorption and separation performance curves of adsorbents 14, such as coconut shell activated carbon, metal-organic frameworks, and carbon nanotubes, can be measured under the same conditions. This allows the establishment of a database of the adsorption and separation effects of various adsorbents 14 on adsorbates in BF3 feed gas. Furthermore, the type and purity of the adsorbate can be varied within a certain range to establish a comprehensive database. In this way, the obtained adsorption separation performance evaluation data can be used to provide data support for the engineering design of the adsorption separation device.

[0064] For example, in one embodiment, taking carbon monoxide feed gas as an example, the purity of the target gas, i.e., carbon monoxide gas, in the carbon monoxide feed gas before adsorption separation is 99.0%. The adsorbates to be evaluated are primarily CO2 and H2O. The adsorption separation performance of CO2 and H2O needs to be evaluated, and the moisture needs to be removed to below 0.5 ppm (parts per million). The boiling point of CO2 is -78.34°C. Liquid nitrogen is selected as the refrigerant 22. The intake volume of the CO feed gas is detected. If the intake volume of the feed gas increases, the flow rate will increase. In this case, to avoid generating greater resistance, large-particle coconut shell activated carbon and 5A molecular sieve are selected as the candidate adsorbents 14. Large-particle coconut shell activated carbon is filled into the purification chamber 11a. Liquid nitrogen is added to the cavity 21a through the refrigerant filling pipe 23 and maintained at a preset liquid level. The adsorption separation performance of the two adsorbates is evaluated under intake pressure conditions of 0.5 MPa to 2.0 MPa. Due to the limitation of moisture removal to below 0.5 ppm, the feed gas inlet pressure must be adjusted based on the adsorption separation performance. Simultaneously, the pressures within the refrigerant supply pipe 23 and the refrigerant discharge pipe 24 must be fine-tuned to achieve an optimal set of adsorption separation performance parameters. Replacing adsorbent 14 with 5A molecular sieve yielded another set of adsorption separation performance parameters. Comprehensive evaluation of these parameters provides data support for the engineering design of the CO feed gas adsorption separation unit.

[0065] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, and improvements that fall within the spirit and principles of the present application are intended to be within the scope of protection of the present application.

Claims

1. A test method for adsorption separation performance testing, applied to an evaluation device for adsorption separation performance testing, characterized in that: The evaluation device comprises: An adsorption assembly includes an adsorption container, an air inlet pipe, an exhaust pipe, a first on-off valve, and a second on-off valve. The adsorption container forms a purification chamber. The air inlet pipe and the exhaust pipe are both in communication with the purification chamber. The purification chamber is used to accommodate an adsorbent. The air inlet pipe is used to deliver a raw gas into the purification chamber. The exhaust pipe is used to discharge a target gas. The first on-off valve is provided on the air inlet pipe and can selectively open or close the air inlet pipe to control the feed rate of the raw gas. A temperature control component, comprising a shell, a refrigerant, a refrigerant filling pipe, and a refrigerant discharge pipe, wherein the shell is formed with a cavity, the adsorption container is arranged in the cavity, the refrigerant filling pipe and the refrigerant discharge pipe are both connected to the cavity, the refrigerant filling pipe is used to deliver the refrigerant into the cavity, and the refrigerant discharge pipe is used to discharge the vaporized refrigerant out of the cavity, and the second switch valve is respectively arranged in the refrigerant filling pipe and the refrigerant discharge pipe, and is used to control the liquid inlet amount of the refrigerant and the exhaust amount of the vaporized refrigerant, so that the temperature drops to the boiling point of the adsorbate and the adsorbate is liquefied; an evaluation component, comprising a processor, an analyzer, and a pressure detector, wherein the first switch valve and the second switch valve are both communicatively connected to the processor, the analyzer is provided on the exhaust pipe to detect the purity of the target gas, the pressure detector is provided on the intake pipe, and the processor is communicatively connected to the analyzer and the pressure detector; The testing method includes: adjusting the inlet pressure of the raw gas under the condition that the temperature in the purification chamber is a preset temperature, and detecting the purity of the target gas; According to the corresponding purities at different intake pressures, a mapping relationship between the intake pressure of the raw gas and the purity is established.

2. The testing method according to claim 1, wherein: The evaluation component includes a pressure sensor, which is communicatively connected to the processing instrument. The pressure sensor is provided in both the refrigerant filling pipe and the refrigerant discharge pipe.

3. The testing method according to claim 1, wherein: The bottom surface of the purification chamber is an arc surface with a lower middle and higher edges.

4. The testing method according to claim 1, wherein: The distance between the tail end of the air inlet pipe in the purification chamber and the bottom surface of the purification chamber is greater than 0.

5. The testing method according to claim 1, wherein: The outer peripheral surface of the air intake pipe is surrounded by the adsorbent, and a gap between the adsorbent and the outer peripheral surface of the air intake pipe is smaller than a preset value.

6. The testing method according to claim 1, wherein: The temperature control assembly includes a shell, a refrigerant medium, a refrigerant filling pipe, and a refrigerant discharge pipe. The shell forms a cavity, the adsorption container is disposed in the cavity, the refrigerant filling pipe and the refrigerant discharge pipe are both connected to the cavity, the refrigerant filling pipe is used to deliver the refrigerant medium into the cavity, and the refrigerant discharge pipe is used to discharge the vaporized refrigerant out of the cavity. The testing method includes: The flow rate of the refrigerant in the refrigerant filling pipe and the flow rate of the refrigerant in the refrigerant discharge pipe are adjusted so that the temperature in the purification chamber is the preset temperature.

7. The testing method according to claim 6, characterized in that: The test method includes: The corresponding refrigerant medium is selected according to the boiling point of the adsorbate.

8. The testing method according to claim 7, characterized in that: The raw gas includes carbon monoxide raw gas, hydrogen raw gas, oxygen raw gas or boron trifluoride raw gas, the adsorbent is sulfur dioxide, carbon dioxide or water, and the target gas is carbon monoxide, oxygen or boron trifluoride.

9. The testing method according to claim 7, characterized in that: The adsorbent is a combination of one or more of molecular sieves, activated carbon, metal organic framework materials and carbon nanotubes.

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