A device and method for testing water adsorption capacity under dynamic conditions

Abstract

The present invention discloses a testing device and method for water adsorption capacity under dynamic working conditions, wherein a gas source is connected to a measuring device through a pipeline, and the measuring device is sequentially connected to a No. 1 temperature regulating device, a water distribution device, a No. 2 temperature regulating device, and an adsorption device through a pipeline, and the adsorption device is connected to a discharge pipeline, and the gas from the gas source is regulated by a pressure regulating device, a flow regulating device, and a precision instrument; after entering the No. 1 temperature regulating device, the gas enters the water distribution device, the gas source and the water source are fully mixed, and the gas is cooled by the No. 2 temperature regulating device; the gas enters the adsorption device for adsorption, and then the water content in the inlet and outlet gases is monitored online to monitor the adsorption of water by the adsorbent in the adsorption column in real time, and the amount of water adsorbed by the adsorbent under the working condition is calculated through experimental data. The present invention can improve design accuracy and reduce the size of the adsorber, thereby reducing costs and regeneration energy consumption.

Description

Technical Field

[0001] The present invention relates to a testing device and a method thereof, and more specifically, to a testing device and a method thereof for water adsorption capacity under dynamic working conditions, belonging to the field of gas drying. Background Art

[0002] my country's gas industry is developing rapidly, and demand for dry gas is increasing dramatically across various industries. This rapid and large-scale development of the gas drying sector has led to an increasingly urgent need to select suitable adsorbents, optimize equipment, reduce costs, and achieve precise design. Currently, there are a growing number of adsorbent manufacturers on the market. The static adsorption values ​​and national standard testing methods provided by these manufacturers only provide information on the adsorption capacity of adsorbents for water at room temperature and pressure. This value serves only as a reference for determining the adsorption quality of an adsorbent, but it cannot meet the complex operating conditions of industry. Achieving precise design requires understanding the actual adsorption properties of various adsorbents.

[0003] Research has shown that adsorbent performance is not static; it is affected by a variety of factors, including inlet medium pressure, temperature, and flow rate. However, current methods can only qualitatively assess the extent to which each factor impacts adsorption capacity, preventing precise quantitative calculations. This can lead to excessive design margins, excessive costs, and excessive regeneration energy consumption during the design process. Furthermore, it is also impossible to compare the actual performance of various products and provide a theoretical basis for selecting higher-quality products.

[0004] At present, adsorbent manufacturers in the market only provide data on static water adsorption of adsorbents. Static adsorption only represents the saturated adsorption capacity of the adsorbent on the adsorbate. However, in actual industrial applications, what is more concerned is the dynamic adsorption capacity of the adsorbent under specific working conditions, so as to accurately design the equipment size. Summary of the Invention

[0005] The purpose of the present invention is to test the dynamic water adsorption capacity of an adsorbent, accurately design the adsorbent dosage, improve design accuracy, and reduce the size of the adsorber, thereby reducing costs and regeneration energy consumption. Ultimately, this results in intelligent design. To achieve this, the present invention is implemented through the following technical solutions:

[0006] The present invention provides a testing device for water adsorption capacity under dynamic working conditions, including an air source device, wherein the air source device is connected to a measuring device via a pipeline, the measuring device is connected to a first temperature regulating device via a pipeline, the first temperature regulating device is sequentially connected to a water distribution device, a second temperature regulating device, and an adsorption device via pipelines, and the adsorption device is connected to a discharge pipeline.

[0007] Preferably, pipeline No. 1 is connected to the pipeline between the measuring equipment and temperature regulating device No. 1, pipeline No. 2 is connected to the pipeline between the temperature regulating device No. 1 and the water distribution device, pipeline No. 1 and pipeline No. 2 are connected to the adsorption device after being collected, and a regeneration system is formed between the temperature regulating device No. 1, pipeline No. 1 and pipeline No. 2, and electric control valves are provided on pipeline No. 1, pipeline No. 2 and other pipelines, and the electric control valves are electrically connected to a controller to realize intelligent control of pipeline on and off.

[0008] Preferably, the measuring equipment includes a pressure regulating device, a flow regulating device, and a precision instrument.

[0009] Preferably, the No. 1 temperature regulating device includes an electrically connected vaporizer, an electric heater, and a temperature control module. The gas source temperature is adjustable through the No. 1 temperature regulating device, and a specific adjustment range is: the gas source temperature is adjustable from 3 to 150°C; the No. 2 temperature regulating device includes a circulating water bath, a cold dryer, and a temperature control module. The No. 2 temperature regulating device is used to further cool the gas after the gas source and water are fully in contact to the temperature required for the test, and the gas is made 100% saturated. The temperature value control accuracy of the No. 1 temperature regulating device and the No. 2 temperature regulating device can reach ±0.2°C; the precision instrument includes a mass flow controller, a high-precision thermometer, and a pressure gauge. The precision instrument is used to realize parameter measurement and control of the entire test device.

[0010] Preferably, the pressure regulating device includes a pressure reducing valve, and the pressure regulating device is electrically connected to the controller. The pressure regulating device can realize adjustable gas source pressure, and a specific adjustment range is: the gas source pressure is adjustable from 0.4 to 3.0 MPa.

[0011] Preferably, the flow regulating device includes a flow control valve and a flow meter, and the flow regulating device can ensure that the gas source flow meets the experimental requirements.

[0012] Preferably, the water distribution device includes a boiling tank, a mist capture device, and a gas-liquid separator. The gas passes through the boiling tank filled with water, and after sufficient contact with the water, the mist capture device removes free water, and then the gas is further separated into gas and liquid by the gas-liquid separator to become saturated gas, which then enters the adsorption device for adsorption testing.

[0013] Preferably, the adsorption device is a stainless steel container which can be filled with a certain amount of adsorbent. Both ends of the container are sealed. The moisture in the gas can be removed after the gas passes through the adsorption device. A weighing module is provided in the adsorption device to monitor the weight in real time.

[0014] The present invention provides a method for testing a device for testing water adsorption capacity under dynamic working conditions, the method comprising the following steps:

[0015] 1) During the normal adsorption test, the gas from the gas source equipment is regulated by the pressure regulating device, flow regulating device and precision instrument to control the flow and pressure of the gas;

[0016] 2) After entering the No. 1 temperature regulating device and adjusting the temperature of the gas source, it enters the water distribution device. After the gas source and water source are fully mixed, the gas is cooled by the No. 2 temperature regulating device to ensure that the gas reaches the saturated state at the temperature;

[0017] 3) The gas enters the adsorption device for adsorption. The water content in the inlet and outlet gases is then monitored online to monitor the water adsorption by the adsorbent inside the adsorption column in real time. The amount of water adsorbed by the adsorbent under these conditions is calculated using experimental data. The adsorption device is equipped with a weighing module that records the weight changes of the adsorption device in real time. The actual weight changes are combined with the theoretically calculated water adsorption data obtained from the data read by the controller (or other intelligent processors), making the test results more accurate and reliable. Whether it is adsorption or regeneration, the final gas is discharged to a safe location. The entire test device is safe, reliable, and highly automated.

[0018] Preferably, after the normal adsorption is completed, the system is switched to the regeneration system, which is specifically divided into two processes: heating and cooling. During heating, the gas from the gas source equipment is adjusted to the regeneration conditions through a pressure regulating device, a flow regulating device and a precision instrument to control the flow and pressure of the regeneration gas.

[0019] Close the electric control valve on the pipeline between the No. 1 temperature regulating device and the water distribution device, and heat the regenerated gas to a certain temperature through the No. 1 temperature regulating device before directly entering the adsorption device to heat the adsorbent inside the adsorption device, thereby removing the moisture previously adsorbed by the adsorbent;

[0020] After the heating is completed, the controller closes the electric control valves on pipeline No. 1 and pipeline No. 2 to switch the flow path, so that the cold gas source equipment passes through the pressure regulating device, flow regulating device and precision instrument to adjust the flow and pressure, and then directly enters the adsorption device without passing through the No. 1 temperature regulating device, and the temperature of the entire adsorption device and the adsorbent inside is blown down to room temperature.

[0021] Beneficial Effects: This invention, based on practical industrial needs, incorporates a temperature-adjustable system when the gas source enters the test system. This ensures that, while other conditions remain unchanged, the temperature of the adsorbed gas is adjusted. This allows the actual water adsorption capacity of the adsorbent to be measured at different temperatures, generating a temperature-dependent adsorption curve. This provides precise guidance for determining the appropriate adsorbent dosage for different temperatures in actual design, thereby enabling more precise design, controlling costs, and saving energy.

[0022] Based on practical industrial needs, this invention incorporates a pressure-adjustable system when the gas source enters the test system. This ensures that, while other conditions remain unchanged, the pressure of the adsorbed gas can be adjusted to test the adsorbent's water adsorption capacity at different pressures. Using external computer equipment, a curve showing the effect of pressure on the actual adsorption value can be generated. This provides precise guidance for determining the adsorbent dosage corresponding to pressure changes in actual design. This allows for more precise design, cost control, and energy savings. This testing device also features high pressure regulation accuracy and a wide range of applications.

[0023] This invention utilizes an adjustable inlet gas flow rate to alter the actual gas flow rate, thereby varying the flow rate through the adsorption device bed. The adsorbent's water adsorption capacity is tested at various flow rates, and a curve showing the effect of flow rate on actual adsorption values ​​is generated using external computer equipment. This provides precise guidance for the rational design of drying vessels, enabling more precise design, cost control, and energy savings.

[0024] The test device of the present invention simulates regeneration conditions and tests the effects of different regeneration conditions on adsorbent regeneration by varying factors such as regeneration gas volume and temperature. This guides the selection of regeneration gas volume and temperature in actual design, making the design more precise and achieving the goal of energy conservation and consumption reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural principle diagram of the testing device of the present invention. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings, but the present invention is not limited to the following embodiments.

[0027] like Figure 1 The figure shows a specific embodiment of a testing device for water adsorption capacity under dynamic working conditions of the present invention. This embodiment is a testing device for water adsorption capacity under dynamic working conditions, including an air source device 1, the air source device 1 is connected to a measuring device through a pipeline, the measuring device is connected to a first temperature regulating device 2 through a pipeline, the first temperature regulating device 2 is connected to a water distribution device 5, a second temperature regulating device 7, and an adsorption device 6 in sequence through pipelines, and the adsorption device 6 is connected to a discharge pipeline.

[0028] The pipeline between the measuring equipment and the No. 1 temperature regulating device 2 is connected to the No. 1 pipeline 10, and the pipeline between the No. 1 temperature regulating device 2 and the water distribution device 5 is connected to the No. 2 pipeline 11. The No. 1 pipeline 10 and the No. 2 pipeline 11 are connected to the adsorption device 6 after being combined. The No. 1 temperature regulating device 2, the No. 1 pipeline 10, and the No. 2 pipeline 11 constitute a regeneration system 9. The No. 1 pipeline 10, the No. 2 pipeline 11 and other pipelines are all provided with electric control valves, and the electric control valves are all electrically connected to a controller to realize intelligent control of the pipeline on and off. The gas source equipment 1, No. 1 temperature regulating device 2, the pressure regulating device 3, the flow regulating device 4, the water distribution device 5, the No. 2 temperature regulating device 7, and the adsorption device 6 are all electrically connected to the controller to realize intelligent control of the system.

[0029] The measuring equipment includes a pressure regulating device 3, a flow regulating device 4, and a precision instrument 8. The flow regulating device 4 adjusts the flow of the test gas to change the gas flow rate and test the adsorption capacity of the adsorbent for water at different flow rates; the pressure regulating device 3 tests the adsorption capacity of the adsorbent for water at different pressures; the precision instrument 8 cooperates with the controller to accurately adjust and control the parameter accuracy required for adsorption and regeneration, with a high degree of automation.

[0030] Temperature regulator No. 1 (2) includes an electrically connected vaporizer, an electric heater, and a temperature control module. Temperature regulator No. 1 (2) allows the gas source temperature to be adjusted from 3°C to 150°C. Temperature regulator No. 2 (7) includes a circulating water bath, a cold dryer, and a temperature control module. After the gas source and water have fully contacted, temperature regulator No. 2 (7) further cools the gas to the required test temperature and maintains it at 100% saturation. Temperature regulator No. 1 and No. 2 (7) offer temperature control accuracy of ±0.2°C. Precision instrumentation 8 includes a mass flow controller, a high-precision thermometer, and a pressure gauge. These instruments are used to measure and control the parameters of the entire testing apparatus. Temperature regulator No. 1 (2), No. 2 (7), and precision instrumentation 8 can also utilize conventional devices.

[0031] The pressure regulating device 3 includes a pressure reducing valve. The pressure regulating device 3 is electrically connected to the controller. The pressure regulating device 3 can adjust the gas source pressure to 0.4-3.0 MPa.

[0032] The flow regulating device 4 includes a flow control valve and a flow meter. The flow regulating device 4 can ensure that the gas source flow meets the experimental requirements.

[0033] The water distribution device 4 includes a boiling tank, a mist collecting device, and a gas-liquid separator. The gas passes through the boiling tank filled with water, and after being fully in contact with the water, the mist collecting device removes free water. The gas is then further separated into gas and liquid by the gas-liquid separator to become saturated gas, and then enters the adsorption device for adsorption testing.

[0034] The adsorption device 6 is a stainless steel container that can be filled with a certain amount of adsorbent. Its two ends are sealed. The moisture in the gas can be removed after the gas passes through the adsorption device. A weighing module is provided in the adsorption device 6 to monitor the weight in real time.

[0035] The present invention provides a method for testing a device for testing water adsorption capacity under dynamic working conditions, the method comprising the following steps:

[0036] 1) During the normal adsorption test, the gas from the gas source device 1 is regulated by the pressure regulating device 3, the flow regulating device 4 and the precision instrument 8 to control the flow rate and pressure of the gas. The specific pressure and flow rate are controlled according to actual needs;

[0037] 2) Entering the first temperature regulating device 2, after adjusting the temperature of the gas source, it enters the water distribution device 5. After the gas source and water source are fully mixed, it passes through the second temperature regulating device 7 to cool the gas to ensure that the gas reaches the saturated state at the temperature;

[0038] 3) Entering the adsorption device 6 for adsorption, and then through online monitoring of the water content in the inlet and outlet gases, the adsorption of water by the adsorbent inside the adsorption column is monitored in real time, and the amount of water adsorbed by the adsorbent under this working condition is calculated based on the experimental data. The adsorption device 6 is provided with a weighing module that can record the weight change of the adsorption device in real time. The actual weight change is combined with the adsorption water data obtained through theoretical calculation based on the data read by the controller (or other intelligent processors), making the test results more accurate and reliable.

[0039] Preferably, after the normal adsorption is completed, the system switches to the regeneration system 9, which is specifically divided into two processes: heating and cooling. During the heating process, the gas from the gas source device 1 adjusts the regeneration conditions through the pressure regulating device 3, the flow regulating device 4 and the precision instrument 8 to control the flow and pressure of the regeneration gas.

[0040] Close the electric control valve on the pipeline between the No. 1 temperature regulating device 2 and the water distribution device 5, and heat the regenerated gas to a certain temperature through the No. 1 temperature regulating device 2 and then directly enter the adsorption device 6, thereby heating the adsorbent inside the adsorption device 6 and removing the moisture previously adsorbed by the adsorbent;

[0041] After the heating is completed, the controller closes the electric control valves on pipeline No. 1 10 and pipeline No. 2 11 to switch the flow path, so that the cold gas source equipment 1 passes through the pressure regulating device 3, the flow regulating device 4 and the precision instrument 8 to adjust the flow and pressure, and then directly enters the adsorption device 6 without passing through the No. 1 temperature regulating device 2, and the temperature of the entire adsorption device 6 and the adsorbent inside is blown down to room temperature.

[0042] The present invention tests the adsorbent's water adsorption capacity at different temperatures. Because temperature significantly influences the adsorption capacity of an adsorbent, this method, based on practical industrial needs, sets an adjustable temperature when the gas source enters the test system. This ensures that, while other conditions remain unchanged, the temperature of the adsorbed gas is adjusted to test the adsorbent's actual water adsorption capacity at different temperatures, yielding a curve showing the effect of temperature on the actual adsorption value. This provides precise guidance for determining the adsorbent dosage corresponding to different temperatures in actual design, thereby optimizing design, controlling costs, and saving energy.

[0043] The present invention tests the adsorption capacity of the adsorbent for water under different pressures. Since pressure is one of the factors that affect the adsorption capacity, it can only be judged that the higher the pressure, the better the adsorption capacity. Manufacturers and national standard dynamic test standards can only provide the adsorption capacity of the adsorbent for water under normal pressure. In view of the complexity of the process in the drying field, the pressure of the gas to be dried varies from high to low. In order to understand the actual influence of pressure on the adsorption capacity, it is necessary to start from the basics and obtain a large amount of test data. The present invention is based on actual industrial needs. When the gas source enters the test system, the pressure is set to be adjustable to ensure that the pressure of the adsorbed gas is adjusted under other conditions unchanged, and the adsorption capacity of the adsorbent for water under different pressures is tested to obtain a curve of the influence of pressure on the actual adsorption value. It can accurately guide the adsorbent dosage value corresponding to the pressure change in actual design. Thereby making the design precise, controlling costs, and saving energy consumption. The test device also has the characteristics of high pressure regulation accuracy and wide coverage.

[0044] The present invention tests the adsorption capacity of the adsorbent for water at different flow rates. For the same amount of adsorbent, if the flow rate is different, the size of the corresponding designed adsorber will also be different. Whether the flow rate affects the adsorption capacity and mass transfer area of ​​the adsorbent, and how big the impact is, is also an important factor in the design of the molecular sieve system. The present invention sets the inlet gas to an adjustable flow rate to change the actual flow rate of the gas, thereby achieving the purpose of changing the flow rate through the bed of the adsorption device, and tests the adsorption capacity of the adsorbent for water at different flow rates, and obtains a curve of the influence of flow rate on the actual adsorption value, which can accurately guide the rational design of the drying container. Make the design more precise, control costs, and save energy.

[0045] The saturated gas water distribution device described in this invention, designed to test water adsorption capacity, requires a gas source with a certain water content. Furthermore, to mitigate the effects of other impurities on adsorption, this testing device, by adding water to high-purity gas, can adjust the temperature to achieve a specific humidity level for the water-containing gas. This ensures that the tested gas source contains no impurities other than water, fully meeting the test requirements.

[0046] The present invention features a detachable adsorption device. All adsorbents to be tested are loaded into the device. This requires that the device not only have a structure suitable for practical industrial operation but also be easy to replace and have good sealing performance. The present invention designs a detachable adsorption column with special threaded joints at both ends and gaskets. This allows for flexible assembly and disassembly while ensuring good sealing performance, making it easy for test personnel to operate.

[0047] The present invention provides a regeneration system with adjustable parameters. After adsorption, the adsorbent needs to be regenerated to release the adsorbed impurities before re-adsorption. The quality of regeneration determines whether the adsorption capacity of the adsorbent can be restored to the maximum extent, thereby affecting the adsorption quality of the next stage. The test device of the present invention simulates regeneration conditions and can test the impact of different regeneration conditions on the adsorbent regeneration effect by changing factors such as the regeneration gas volume and temperature, thereby guiding the selection of regeneration gas volume, temperature, etc. in actual design. This makes the design more precise and achieves the purpose of energy saving and consumption reduction.

[0048] The present invention has a precise test and automatic control system. The test device is required to simulate the actual operating conditions, so the tested condition parameters must be accurate. The test instrument used in the present invention has high precision and can fully meet the complex parameter changes in air separation. During the adsorption process, in addition to the instruments at the inlet and outlet to monitor the adsorption of water by the internal adsorbent, it is also equipped with a set of real-time weighing equipment to directly read out the real-time adsorption data. Combined with theoretical calculations, the test results are more accurate and reliable. It also has a set of automatic control systems (controllers). The entire adsorption and regeneration process can automatically switch the closure of each pipeline, automatically read data, and perform subsequent data processing. The entire test process has a high degree of automation and the data is accurate.

[0049] Finally, it should be noted that the present invention is not limited to the above embodiments and may be subject to many variations. All variations that can be directly derived or imagined by a person skilled in the art from the disclosure of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A device for testing water adsorption capacity under dynamic conditions, characterized by: The invention comprises an air source device (1), wherein the air source device (1) is connected to a measuring device via a pipeline, wherein the measuring device is connected to a first temperature regulating device (2) via a pipeline, wherein the first temperature regulating device (2) is sequentially connected to a water distribution device (5), a second temperature regulating device (7), and an adsorption device (6) via pipelines, wherein the adsorption device (6) is connected to a discharge pipeline; The measuring device includes a pressure regulating device (3), a flow regulating device (4), and a precision instrument (8); The No. 1 temperature regulating device (2) includes an electrically connected vaporizer, an electric heater, and a temperature control module, and the No. 1 temperature regulating device (2) is used to adjust the temperature of the gas source; the No. 2 temperature regulating device (7) includes a circulating water bath, a cold dryer, and a temperature control module, and the No. 2 temperature regulating device (7) is used to further cool the gas after the gas source and water are fully in contact to the temperature required for the test, and the gas is kept in a 100% saturated state. The temperature control accuracy of the No. 1 temperature regulating device (2) and the No. 2 temperature regulating device (7) can reach ±0.2°C; the precision instrument (8) includes a mass flow controller, a high-precision thermometer, and a pressure gauge, and the precision instrument (8) is used to measure and control the parameters of the entire test device.

2. The device for testing water adsorption capacity under dynamic conditions according to claim 1, characterized in that: The pipeline between the measuring device and the No. 1 temperature regulating device (2) is connected to the No. 1 pipeline (10), and the pipeline between the No. 1 temperature regulating device (2) and the water distribution device (5) is connected to the No. 2 pipeline (11). The No. 1 pipeline (10) and the No. 2 pipeline (11) are connected to the adsorption device (6) after being collected. The No. 1 temperature regulating device (2), the No. 1 pipeline (10), and the No. 2 pipeline (11) constitute a regeneration system (9). The No. 1 pipeline (10), the No. 2 pipeline (11) and other pipelines are all provided with electric control valves, and the electric control valves are all electrically connected to a controller to realize intelligent control of pipeline on and off.

3. A device for testing water adsorption capacity under dynamic conditions according to claim 1 or 2, characterized in that: The pressure regulating device (3) comprises a pressure reducing valve and a back pressure valve. The pressure regulating device (3) is electrically connected to the controller. The pressure regulating device (3) can achieve adjustable gas source pressure.

4. A device for testing water adsorption capacity under dynamic conditions according to claim 1 or 2, characterized in that: The flow regulating device (4) comprises a flow control valve and a flow meter, and the flow regulating device (4) can achieve a gas source flow rate that meets experimental requirements.

5. The device for testing water adsorption capacity under dynamic conditions according to claim 1 or 2, characterized in that: The water distribution device (5) includes a boiling tank, a mist collecting device, and a gas-liquid separator. The gas passes through the boiling tank filled with water, and after being fully in contact with the water, the mist collecting device removes free water, and then the gas is further separated into gas and liquid by the gas-liquid separator to become saturated gas, which then enters the adsorption device for adsorption testing.

6. A device for testing water adsorption capacity under dynamic conditions according to claim 1 or 2, characterized in that: The adsorption device (6) is a stainless steel container that can be filled with a certain amount of adsorbent. Its two ends are sealed. After the gas passes through the adsorption device, moisture in the gas can be removed. A weighing module is provided in the adsorption device (6) to monitor the weight in real time.

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