Dehumidifying rotating wheel type selection test method

Abstract

The invention discloses a desiccant rotating wheel type selection test method, which comprises the following steps of: S1, establishing a function relationship among a processing air speed, a regeneration air speed, a processing air quantity, a regeneration air quantity, a rotating wheel diameter and a partition ratio, and determining a type selection working condition; s2, assembling each test unit, and configuring the type selection working condition: configuring an equivalent working condition according to the temperature and humidity of a treatment inlet, and realizing alternate adsorption-regeneration at an adsorption and desorption wind speed; and S3, the type, thickness and operation parameters of the rotating wheel are adjusted, the equipment is operated to be stable, the treatment and regeneration pressure drop is not higher than the type selection setting requirement, and the dehumidification amount per unit time is not lower than the type selection requirement. The desiccant rotating wheel type selection test method can provide data support for industrial desiccant rotating wheel type selection, improves the type selection efficiency and precision, can be used in the research and development stage of desiccant materials, and reduces the investment of research and development test equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of rotary dehumidification, and more specifically, to a dehumidification rotary wheel selection and testing method. Background Art

[0002] The rotary dehumidifier is a dehumidification and humidity control equipment used in the field of air treatment system technology. It can be used in industrial dehumidification fields such as food and medicine, lithium battery new energy, as well as civil dehumidification fields such as household fresh air dehumidification and washing and drying machines. Its core component is the dehumidification wheel. The dehumidification wheel is separated into a dehumidification adsorption treatment area and a regeneration and desorption area by heat-resistant materials. During the operation of the wheel, air dehumidification and high-temperature regeneration are completed in sequence to achieve the transfer of water vapor in the air and meet the humidity control requirements. Compared with traditional compressor dehumidification, the rotary dehumidification has the characteristics of low noise, large dehumidification depth, and dehumidification under low temperature conditions. The wheel is the core component of the rotary dehumidification equipment. The size, operating parameters, dehumidification performance and material stability of the wheel are related to the dehumidification effect, energy efficiency and service life of the dehumidifier.

[0003] The current selection method relies on the data and experience accumulated from existing dehumidification material types. There is a lack of selection basis for new or unconventional and composite dehumidification wheels, and a lack of scientific and effective prediction of service life and failure progression. In addition, there are multiple wheel sizes and different combinations of operating parameters for the same dehumidification effect, resulting in low selection efficiency and heavy selection workload. The traditional test selection method involves complex equipment structure, large floor space, high initial investment, and high operating energy consumption, which is not conducive to large-scale testing and rapid selection.

[0004] Therefore, how to provide a dehumidification wheel selection and testing method with high selection efficiency, high accuracy, economy and practicality that is suitable for the testing, development and selection of new wheels has become a technical problem that urgently needs to be solved in this field. Summary of the invention

[0005] The purpose of the present invention is to provide a dehumidification wheel selection test method with reserved selection margin.

[0006] The present invention provides a dehumidification wheel selection and testing method, comprising:

[0007] Step S1, establishing a functional relationship among processing wind speed, regeneration wind speed, processing air volume, regeneration air volume, rotor diameter, and partition ratio, and clarifying the selection conditions;

[0008] Step S2, assemble each test unit and configure the selected working condition: configure the equivalent working condition according to the processing inlet temperature and humidity, and realize alternating adsorption-regeneration under the adsorption and desorption wind speed;

[0009] Step S3, adjust the wheel type, thickness and operating parameters, operate the equipment and achieve stability, the processing and regeneration pressure drops are not higher than the selection setting requirements, and the dehumidification capacity per unit time is not lower than the selection requirements.

[0010] Optionally, in step S1, clarifying the selection conditions includes:

[0011] Establish the functional relationship between the treatment wind speed and the treatment air volume, the rotor diameter, and the treatment partition ratio; establish the functional relationship between the regeneration wind speed and the regeneration air volume, the rotor diameter, and the regeneration partition ratio;

[0012] Clarify the treatment air volume, desorption air volume, inlet temperature and humidity, and dehumidification requirements, match the treatment and regeneration air volumes selected according to needs with different impeller diameters, and convert multiple groups of equivalent wind speeds, i.e., test treatment wind speed and test regeneration wind speed.

[0013] Optionally, each test unit includes a wheel test chamber, in which a wheel block is arranged; a treatment air inlet and a regeneration air outlet are arranged on one side of the wheel test chamber, and a treatment air outlet and a regeneration air inlet are arranged on the other side of the wheel test chamber; and pressure difference testers are arranged on opposite sides of the wheel block;

[0014] The air inlet path for processing air includes a first temperature and humidity tester and a first air volume controller which are arranged in sequence;

[0015] The processed air outlet path includes a second temperature and humidity tester;

[0016] The regeneration air inlet path includes a second air volume controller, a third temperature and humidity tester, an electric heater and a temperature tester which are arranged in sequence; a steam pipeline is also connected to the pipeline between the third temperature and humidity tester and the electric heater, and the steam pipeline includes a steam generator and a third air volume controller which are arranged in sequence;

[0017] The regeneration air outlet path includes a fourth temperature and humidity tester.

[0018] Optionally, the configuration selection conditions include:

[0019] Equivalent working conditions are configured according to the temperature and humidity of the treatment inlet of the treatment air inlet and the regeneration inlet of the regeneration air inlet. The equivalent working conditions include equivalent wind speed, temperature and humidity. The test treatment air volume and the test regeneration air volume are calculated according to the equivalent wind speed, and continuous alternation of adsorption and regeneration is achieved through two groups of air volume controllers, namely the first air volume controller and the second air volume controller.

[0020] Optionally, in step S1, the configuration and parameters of each test unit are adjusted so that the test unit can operate stably as a whole and the dehumidification capacity per unit time is not less than the selection requirements, including:

[0021] Adjust the wheel type, wheel size and operating parameters, operate the test unit and achieve stable adsorption and desorption.

[0022] Optionally, adjusting the rotor type, rotor size and operating parameters, operating the test unit and achieving stable adsorption and desorption include:

[0023] Under the condition that the wind resistance does not exceed the pressure drop, the rotor thickness, equivalent processing wind speed, equivalent regeneration wind speed, regeneration temperature, adsorption-desorption alternation time, and adsorption-desorption time ratio are used as variables for debugging. After a certain period of adsorption and desorption, the adsorption-desorption equilibrium is reached, and the corresponding variable parameters are recorded. The average dehumidification capacity per unit time (g (water) / kg (air)) is calculated. The corresponding average dehumidification capacity is not lower than the selection requirements.

[0024] Optionally, in step S3, after qualified selection, the dehumidification capacity per unit electricity and the dehumidification capacity per unit volume are calculated to give the optimal value for dehumidification wheel selection; according to the optimal value, the wheel thickness, partition and other structural selections are completed, as well as the parameters of rotation speed, processing and regeneration wind speed, and regeneration temperature.

[0025] Optionally, the testing method further includes:

[0026] Step S4, subjecting the rotating wheel of the test unit to hydrothermal aging and / or thermal aging conditions and then performing another working condition test to determine the degree of attenuation;

[0027] Step S5, calculate the dehumidification capacity per unit electricity, the dehumidification capacity per unit volume and the test equivalent wind speed; complete the selection of structural parameters and operating parameters according to the optimal values ​​of the dehumidification capacity per unit electricity and / or the dehumidification capacity per unit volume.

[0028] Optionally, step S5 specifically includes:

[0029] If the attenuation degree is less than the preset value, the dehumidification capacity per unit electricity and the dehumidification capacity per unit volume are calculated according to the selected working conditions and the configuration and parameters of each test unit; the test equivalent wind speed is calculated, and the wheel structure size or type parameters and operating parameters are selected according to the optimal value of the dehumidification capacity per unit electricity and / or the dehumidification capacity per unit volume.

[0030] Optionally, in step S4, the wheel of the test unit is placed under hydrothermal aging and / or thermal aging conditions and then tested again to determine the degree of attenuation, including:

[0031] A rotor test chamber is constructed, and high-temperature and high-humidity gas is passed into the rotor test chamber to simulate the operating failure condition of the rotor. The hydrothermal aging temperature is higher than the normal regeneration temperature to accelerate aging.

[0032] According to the technical content disclosed in the present invention, the following beneficial effects are achieved:

[0033] The dehumidification wheel selection test method provided by the present invention aims at the characteristics that the wheel adsorption-regeneration coupling process is affected by multiple parameters, the selection is poorly targeted, and different types of wheel databases cannot be universal. A test selection scheme is proposed to clearly fix the diameter of the test wheel and use the equivalent wind speed and alternating adsorption and regeneration method to calculate the dehumidification performance. The dehumidification wheel selection test method provided by the present invention is not limited by the traditional test selection fixed equipment. One device can conveniently and flexibly adjust the test parameters to achieve the selection of wheel thickness and partition angle parameters, reduce the test equipment investment, and improve the convenience and accuracy of the selection. In addition, the test equipment is miniaturized and the selection parameters can be flexibly adjusted. One selection device can meet the test of wheels with different partition ratios, different sizes, and different types.

[0034] The dehumidification wheel selection and testing method provided by the present invention introduces two energy efficiency calculation methods, namely, dehumidification per unit electricity and dehumidification per unit volume. The selection is more reasonable and efficient, taking into account both the operating energy efficiency and the intensiveness and economy of the wheel and the system. It is suitable for conventional dehumidification wheels and composite wheels of different types and thicknesses. It is convenient to adjust the thickness parameters, composite order and type by stacking or changing the order, and the test efficiency is greatly improved. It is suitable for the performance evaluation of new dehumidification wheels. It can also be used for guidance on the development of high-efficiency dehumidification wheels and dehumidification unit equipment. The dehumidification per unit electricity is used to measure the dehumidification energy efficiency. The dehumidification per unit electricity and per unit volume are used to measure the dehumidification energy efficiency per unit wheel volume, i.e., the economy of the wheel equipment. It takes into account the energy saving of the wheel operation and reduces the initial investment in the wheel equipment.

[0035] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0037] Figure 1 It is a schematic diagram of the structure of the dehumidification wheel selection and testing equipment of the present invention.

[0038] Explanation of the accompanying drawings: 1. Process inlet air; 21. First temperature and humidity tester; 22. Second temperature and humidity tester; 23. Third temperature and humidity tester; 24. Fourth temperature and humidity tester; 31. First air volume controller; 32. Second air volume controller; 33. Third air volume controller; 4. Process outlet air; 5. Regeneration air source; 6. Electric heater; 7. Temperature tester; 8. High-temperature regeneration air; 9. Regeneration outlet air; 10. Hydrothermal aging air source; 11. Steam generator; 12. Rotor test chamber; 121. First rotor block; 122. Second rotor block; 13. Pressure difference tester.

[0039] Figure 2 Flow chart of a testing method in one embodiment of the present application. DETAILED DESCRIPTION

[0040] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0041] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0042] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0043] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0044] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0045] At present, the dehumidification wheel is mostly reflected by the comprehensive technical index of wheel dehumidification performance (DCOP, dehumidification performance coefficient) to reflect the dehumidification performance and energy utilization rate of the wheel. It only considers the high energy efficiency utilization rate of the wheel after selection, but ignores the influence of multiple factors such as wheel thickness, rotation speed, and partition. The selected wheel size is often not in line with reality. The selected wheel diameter and thickness are too large, the running wind resistance is high, the dehumidification equipment occupies a large area, and the core components such as the wheel and fan are too large. The heat and mass transfer process of the dehumidification wheel is a synchronous and mutually coupled process. Different types of wheels are affected by the adsorbent type and structural size. For the same wheel, the dehumidification capacity is closely related to multiple variables such as the gas state (temperature, moisture content) of adsorption and regeneration, processing wind speed, regeneration wind speed, wheel rotation speed, and the proportion of processing and regeneration partitions. Therefore, it is necessary to construct a selection method that can comprehensively consider various influencing factors, select accurately, and have appropriate margins.

[0046] The present invention discloses a method for using Figure 1 The dehumidification wheel selection test method of the dehumidification wheel selection test equipment shown.

[0047] like Figure 1As shown, the dehumidification wheel selection test equipment includes multiple test units, and the test units mainly include a wheel test chamber 12. A wheel block is arranged in the wheel test chamber 12. One or more wheel blocks can be arranged. The number of wheel blocks can be adjusted at any time according to the test conditions. In this embodiment, a first wheel block 121 and a second wheel block 122 are arranged on a common axis. A treatment air inlet and a regeneration air outlet are arranged on one side of the wheel test chamber, and a treatment air outlet and a regeneration air inlet are arranged on the other side of the wheel test chamber; pressure difference testers 13 are arranged on opposite sides of the wheel block to measure the pressure difference value on opposite sides of the wheel test chamber;

[0048] The processed air inlet includes a first temperature and humidity tester 21 and a first air volume controller 31 which are arranged in sequence; the processed air outlet includes a second temperature and humidity tester 22; the regenerated air inlet includes a second air volume controller 32, a third temperature and humidity tester 23, an electric heater 6 and a temperature tester 7 which are arranged in sequence; a steam pipeline is also connected to the pipeline between the third temperature and humidity tester 23 and the electric heater 6, and the steam pipeline includes a steam generator 11 and a third air volume controller 33 which are arranged in sequence; the regenerated air outlet includes a fourth temperature and humidity tester 24.

[0049] During the test, the treated inlet air 1 of the treated air inlet path enters the treated air inlet of the rotary test chamber 12 via the first temperature and humidity tester 21 and the first air volume controller 31 in turn, and the treated outlet air 4 treated by the rotary test chamber 12 is discharged via the treated air outlet path, and the second temperature and humidity tester 22 measures the temperature and humidity values ​​of the treated outlet air 4.

[0050] During the regeneration process, the regeneration air source 5 of the regeneration air inlet path passes through the second air volume controller 32, the third temperature and humidity tester 23, and the electric heater 6 in sequence to form a high-temperature regeneration air 8, which enters the regeneration air inlet of the rotor test chamber 12 after passing through the temperature tester 7; after the regeneration is completed, the regeneration outlet air 9 is discharged through the regeneration air outlet path, and the fourth temperature and humidity tester 24 on the regeneration air outlet path detects the temperature and humidity of the regeneration outlet air 9. The steam generator 11 and the third air volume controller 33 are connected to the inlet end of the electric heater 6 through a steam pipeline, and the hydrothermal aging air source 10 passes through the steam generator 11 and the third air volume controller 33 in sequence to enter the electric heater 6 to form a hydrothermal aging airflow and enter the rotor test chamber 12 to perform regeneration simulation aging conditions, or the hydrothermal aging airflow and the high-temperature regeneration air 8 alternately enter the rotor test chamber 12 to measure the combined effect of high-temperature aging and high-temperature hydrothermal aging on the dehumidification performance of the rotor.

[0051] like Figure 2 As shown, the dehumidification wheel selection test method includes:

[0052] Step S1, establish the functional relationship between the treatment wind speed, regeneration wind speed, treatment air volume, regeneration air volume, rotor diameter, and partition ratio, and clarify the selection conditions; treatment air volume, desorption air volume, inlet temperature and humidity, dehumidification requirements, match the treatment and regeneration air volumes to different rotor diameters (selected in the product size specifications) according to the required selection, and convert multiple groups of equivalent wind speeds, that is, test treatment wind speed, test regeneration wind speed

[0053] In step S1, the selected working conditions are clarified to include:

[0054] Establish the functional relationship between the processing wind speed and the processing air volume, the wheel diameter, and the processing partition ratio; establish the functional relationship between the regeneration wind speed and the regeneration air volume, the wheel diameter, and the regeneration partition ratio; among which,

[0055] Processing wind speed = processing air volume / (wheel diameter^2*π / 4*3600*processing partition ratio);

[0056] Regeneration wind speed = regeneration air volume / (rotor diameter ^ 2 * π / 4 * 3600 * regeneration partition ratio);

[0057] Processing wind speed, regeneration wind speed, in m / s;

[0058] Processing air volume, regeneration air volume, unit is m 3 / h;

[0059] The unit of runner diameter is m;

[0060] The treatment zone is the ratio of the adsorption zone to the overall area of ​​the rotor, which is 0.50 to 0.80;

[0061] The regeneration zone is the ratio of the regeneration zone to the overall area of ​​the rotor, which is 0.2 to 0.5;

[0062] Treatment partition ratio + regeneration partition ratio = 1.0.

[0063] After the selection conditions are determined, Figure 1 The dehumidification wheel selection test equipment shown is equipped with each test unit and step S2 is performed;

[0064] Step S2, assemble each test unit and configure the selected working condition: configure the equivalent working condition according to the processing inlet temperature and humidity, and realize alternating adsorption-regeneration under the adsorption and desorption wind speed;

[0065] During the test selection stage, simple alternating adsorption-regeneration was used to simulate the continuous and complex coupling operation of the wheel, breaking away from the traditional test selection that only focused on the adsorption performance and ignored the influence of the residence time in the desorption zone and the desorption temperature on the wheel performance, resulting in a small desorption angle and a large deviation in the desorption temperature.

[0066] By establishing the functional relationship between the treatment wind speed and the treatment air volume, the rotor diameter, and the treatment partition ratio, the evaluation of the rotor adsorption dehumidification under the equivalent treatment wind speed under simulated real working conditions is realized. The functional relationship between the regeneration wind speed and the regeneration air volume, the rotor diameter, and the regeneration partition ratio is established, and the evaluation effect of the rotor analytical regeneration under the equivalent desorption wind speed is realized.

[0067] More specifically, the configuration of the selected working conditions includes: configuring equivalent working conditions according to the temperature and humidity of the processing inlet of the processing air inlet and the regeneration inlet of the regeneration air inlet, the equivalent working conditions include equivalent wind speed, temperature and humidity, calculating the test processing air volume and the test regeneration air volume according to the equivalent wind speed, and realizing the continuous alternation of adsorption-regeneration through two sets of air volume controllers (the first air volume controller 31 and the second air volume controller 32);

[0068] Among them, the test processing air volume = equivalent processing wind speed * test wheel block diameter ^ 2 * π / 4 * 3600; the test regeneration air volume = equivalent regeneration wind speed * test wheel block diameter ^ 2 * π / 4 * 3600.

[0069] The dehumidification wheel selection test method is not limited by the traditional test selection fixed equipment. It reflects the actual linear wind speed of the humid gas passing through the dehumidification wheel during the adsorption-desorption process more truly based on the equivalent wind speed, making the selection more efficient and accurate.

[0070] Step 3: Adjust the wheel type, thickness and operating parameters, operate the equipment and achieve stability, ensure that the processing and regeneration pressure drops are not higher than the selection setting requirements, and the dehumidification capacity per unit time is not lower than the selection requirements.

[0071] Furthermore, in step S3, the wheel type, thickness and operating parameters are adjusted, the equipment is operated and reaches stability, the processing and regeneration pressure drops are not higher than the selection setting requirements, and the dehumidification capacity per unit time is not lower than the selection requirements, including:

[0072] Adjust the rotor type, rotor (thickness) size and operating parameters, run the test unit and achieve stable adsorption and desorption. When the wind resistance does not exceed the pressure drop (the pressure difference is approximately linearly related to the rotor thickness and wind speed), use the rotor thickness, equivalent processing wind speed, equivalent regeneration wind speed, regeneration temperature, adsorption and desorption alternation time, and adsorption and desorption time ratio as variables for debugging. After a certain period of adsorption and desorption, the adsorption-desorption equilibrium is reached, and the corresponding variable parameters are recorded. The average dehumidification per unit time (g (water) / kg (air)) is calculated, and the corresponding average dehumidification is not less than the selection requirements. Among them, the thickness of the rotor block of the test rotor can be adjusted by replacing the rotor block, or splicing the rotor block front and back; it can also be used to test the performance of different types or different types of combined rotors by replacing different rotor types or different combinations of rotor types. There may be multiple groups of corresponding variable combinations that meet its dehumidification requirements.

[0073] Calculation of average dehumidification per unit time includes: Dehumidification per unit time = total dehumidification per cycle * (t1-t0) / (t2-t0), unit: g (water) / kg (air);

[0074] Among them, the method for calculating the dehumidification capacity of a single treatment cycle includes:

[0075] Humidity difference d = treatment inlet moisture content - treatment outlet moisture content, unit: g (water) / kg (air);

[0076] After the adsorption-desorption equilibrium is reached, the corresponding relationship between the treatment time and the humidity difference d is recorded, and the fitting formula d = F (t) is obtained;

[0077] The unit is kg / h, t0 is the treatment cycle start time, t1 is the treatment cycle end time and t1 is the regeneration start time, t2 is the regeneration end time, and the unit of t0, t1, t2 is h;

[0078] And / or, calculating the dehumidification capacity for a single treatment cycle includes:

[0079] The weight change of the dehumidification block in an adsorption-regeneration cycle after reaching equilibrium is obtained, and the dehumidification capacity of a single treatment cycle is calculated by the weight difference after the end of adsorption or regeneration.

[0080] It can be seen that the operation of the wheel is a dynamic continuous and reciprocating adsorption-regeneration process. It is affected by multiple parameters, the selection is poorly targeted, and databases of different types of wheels cannot be universal. It is difficult to achieve efficient selection and testing through existing technologies and equipment. The present invention fixes the diameter of the test wheel, calculates the dehumidification performance with an equivalent wind speed, and obtains the partition angle parameters and rotation speed through intermittent adsorption-desorption time; it is not limited by the fixed equipment of traditional test selection, and can conveniently and flexibly adjust the test parameters with one device to achieve the selection of wheel type, size (including thickness and diameter), and partition angle parameters, thereby reducing the investment in test equipment and improving the convenience and accuracy of selection. In addition, the test equipment is miniaturized and the selection parameters can be flexibly adjusted, so one selection device can meet the test of wheels with different partition ratios and different sizes.

[0081] The operation process of the wheel goes through "adsorption-regeneration". The wheel in the regeneration zone is in an unfavorable high-temperature hydrothermal condition, which causes the performance of the wheel to decay. Therefore, when selecting a model, it is necessary to reserve a selection margin based on the performance decay process. The existing selection scheme only considers the performance evaluation of the wheel in the initial and fresh state, ignoring the performance decay of the wheel aging, which may lead to insufficient selection margin and the time for the dehumidification performance of the wheel to reach the standard, that is, the service life is less than expected.

[0082] Further Figure 2 As shown, the dehumidification wheel selection test method also includes: step S4, placing the wheel of the test unit under hydrothermal aging and / or thermal aging conditions and then performing a working condition test again to determine the attenuation degree.

[0083] It mainly includes constructing a wheel test chamber of the dehumidification wheel selection test equipment, passing high temperature and high humidity gas into the wheel test chamber 12 to simulate the failure condition of the wheel operation, and the hydrothermal aging temperature is higher than the normal regeneration temperature for accelerated aging. The high temperature and high humidity gas is generated by heating the gas through the steam generator 11 and the electric heater 6; the high temperature and high humidity gas and the high temperature gas pass through the second air volume controller and the third air volume controller, and can enter the wheel test chamber 12 alone for high temperature aging or high temperature hydrothermal aging respectively, or can alternately enter the wheel test chamber 12 to measure the combined effect of high temperature aging and high temperature hydrothermal aging on the dehumidification performance of the wheel.

[0084] Step S5, calculate the dehumidification capacity per unit electricity, the dehumidification capacity per unit volume and the test equivalent wind speed; complete the selection of structural parameters and operating parameters according to the optimal values ​​of the dehumidification capacity per unit electricity and / or the dehumidification capacity per unit volume.

[0085] Specifically, it includes: after passing the hydrothermal aging airflow for a certain period of time, the test sample is re-tested under the working condition, and the selection is judged to be qualified if the performance attenuation is within the required range; if the attenuation degree is less than the preset value, the dehumidification capacity per unit electricity and the dehumidification capacity per unit volume per unit electricity are calculated according to the selected working condition of step S1 and the configuration and parameters of each test unit; the test equivalent wind speed is calculated, and the selection of structural parameters and operating parameters is completed according to the optimal value.

[0086] The present invention proposes for the first time to introduce aging evaluation in the selection stage, estimate the service life to meet the standard, and the reliability of the selection is strong. The main cause of failure of the dehumidification wheel is the degradation of the performance of dehumidification materials such as silica gel under high-temperature hydrothermal conditions in the desorption zone. By increasing the thermal aging temperature and hydrothermal aging temperature, alternating thermal aging and hydrothermal aging, and aging under saturated water vapor and / or high temperature conditions, the aging process can be truly reflected and the standard service life of the wheel performance can be evaluated; the size margins such as the thickness and diameter of the wheel can be reserved more scientifically.

[0087] Further, in step S3, after the selection is qualified, the dehumidification capacity per unit electricity and the dehumidification capacity per unit volume per unit electricity are calculated, and the optimal value for the dehumidification wheel selection is given; according to the optimal value, the wheel thickness, partition and other structural selections, as well as the parameters of the rotation speed, processing and regeneration wind speed, and regeneration temperature are completed, wherein,

[0088] Test wheel block volume = test wheel block diameter ^ 2 * π / 4 * thickness, unit m 3 ;

[0089] Regeneration power = (regeneration inlet temperature - temperature before heating) * air density * air specific heat capacity * regeneration air volume * (t2-t1) / (t2-t0), unit kw·h;

[0090] Dehumidification per unit electricity = dehumidification per unit time * 1000 / regeneration electricity, unit: kg (水) / (Kw·h);

[0091] Dehumidification per unit volume per unit electricity = Dehumidification per unit electricity / volume of test wheel block, unit: kg (水) / (Kw·h·m 3 );

[0092] Regeneration zone proportion selection = (t2-t1) / (t2-t0);

[0093] Treatment area ratio selection = (t1-t0) / (t2-t0), t0, t 1、 t2, unit is h;

[0094] Speed ​​selection = 1 / (t2-t0), unit is r / h;

[0095] Thickness selection = test block thickness, unit: m;

[0096] Unit: m.

[0097] The present invention introduces two energy efficiency calculation methods: dehumidification per unit electricity and dehumidification per unit volume. The selection is more reasonable and efficient, taking into account the operating energy efficiency and the intensiveness and economy of the wheel and system; it is suitable for conventional dehumidification wheels, and also for composite wheels of different types and thicknesses. It is convenient to adjust the thickness parameters, composite order and type by stacking or changing the order, and the test efficiency is greatly improved. It is suitable for the performance evaluation of new dehumidification wheels; it can also be used for guidance on the development of high-efficiency dehumidification wheels and dehumidification unit equipment. The dehumidification per unit electricity is used to measure the dehumidification energy efficiency; the dehumidification per unit electricity and per unit volume are used to measure the dehumidification energy efficiency per unit wheel volume, that is, the economy of the wheel equipment; it takes into account the energy saving of the wheel operation, while reducing the investment in the wheel equipment.

[0098] Specific example: It is known that the gas to be dehumidified is: the air volume to be processed is 10000m 3 / h, temperature is 15℃, moisture content is 10g (水) / kg (空气) , 4g is required through rotary dehumidification (水) / kg (空气 ) The humidity content of the gas is the same as that of the gas to be dehumidified, and the processing and regeneration wind resistance is ≤300pa; the optimal dehumidification wheel type and size parameters are sought, so that the wheel operation energy consumption and wheel equipment size are better, and the performance reaches the standard service life. The test wheel diameter is 500mm, and the wheel type and thickness are adjusted by splicing wheels of different thicknesses front and back.

[0099] 1. Establish the functional relationship between the wind speed and air volume, impeller diameter, and partition ratio of the treatment and regeneration lines, and clarify the selection conditions.

[0100] 2. Assemble each test unit and configure the selected working conditions: configure the same working conditions according to the treatment and regeneration inlet temperature and humidity, and realize alternating adsorption-regeneration.

[0101] 3. When the regeneration pressure drop can meet the selection requirements, the equipment is debugged with the wheel thickness, treatment, regeneration equivalent wind speed, regeneration temperature, treatment and regeneration alternation time, and treatment and regeneration time ratio as variables. The test block thickness can be adjusted by a single block of different thickness, or by installing test blocks of different thicknesses or by splicing blocks of the same type or blocks of different types front and back. After a certain period of adsorption and desorption, the adsorption-regeneration equilibrium is reached, and the corresponding variable parameters are recorded to calculate the average dehumidification capacity per unit time (g (水) / kg (空气) ), the treatment and regeneration pressure drops are not higher than the selection setting requirements, and the corresponding average dehumidification capacity is not lower than the selection requirements. There may be multiple groups of corresponding variable combinations that meet the dehumidification requirements, and the combinations that meet the requirements are listed.

[0102] 4. Place the runner under hydrothermal aging conditions: introduce 100°C saturated water vapor and heat to 100°C higher than the selected temperature (e.g. the normal regeneration temperature is 120°C, set the aging temperature to 220°C), and perform another operating condition test after aging for 72 hours. If the performance attenuation is lower than the set value (e.g. <5%), it is determined to have met the requirements.

[0103] 5. After the selection is qualified, the dehumidification capacity per unit electricity and the dehumidification capacity per unit volume are calculated, and the optimal value for the dehumidification wheel selection is given; according to the optimal value, the wheel thickness, partition and other structural selections, as well as the parameters of speed, processing and regeneration wind speed, and regeneration temperature are completed.

[0104] The dehumidification wheel selection test method provided by the present invention can provide a more convenient, rapid and accurate selection for wheels such as unconventional dehumidification wheels or composite dehumidification wheels that have not yet formed a test database, which is helpful for the development of new dehumidification wheel materials and product iteration. Compared with traditional methods, the test selection cycle can be shortened from 10 days to 1-2 days, and the problems of difficulty and long cycle in wheel replacement are eliminated. In addition, the desorption zone of the test equipment involved in the traditional test selection method is usually fixed, and the desorption angle cannot be conveniently adjusted according to the actual working conditions and dehumidification requirements. The selection is poorly targeted and the desorption angle deviation is large, resulting in low energy efficiency of the selected wheel.

[0105] It can be seen that the present invention:

[0106] For the first time, a method for evaluating the energy efficiency of a dynamically operating rotor using alternating adsorption and desorption on a fixed bed was proposed, and the optimal rotation speed and optimal regeneration partition angle were determined by adjusting the duration of alternating treatment and regeneration.

[0107] For the first time, a method was proposed to use a fixed (non-rotating) rotor to determine the optimal operating speed, partition angle, rotor type and size (including diameter and thickness) under simulated working conditions.

[0108] For the first time, it is proposed that under the same working conditions, the dehumidification capacity per unit power and the dehumidification capacity per unit power per unit volume can be used to replace DCOP to measure the dehumidification efficiency of the wheel and select the most advantageous wheel size.

[0109] For the first time, thermal / hydrothermal aging treatment of runners was proposed to predict the failure process and reserve a margin for runner selection.

[0110] By adjusting the adsorption-regeneration cycle of water vapor on the fixed bed rotor, as well as the thickness and rotor type, the investment in test equipment is reduced. One test device can be used to select the optimal regeneration angle and speed for the rotor operation, and complete the evaluation of rotors with different adsorption-treatment wind speeds, different rotor types and sizes, without increasing the investment in rotor transmission and partition equipment replacement. The dehumidification per unit power and dehumidification per unit volume are introduced to measure the energy efficiency of the dehumidification rotor, which is suitable for the development, testing and evaluation of new dehumidification rotors.

[0111] The selection test adds "accelerated high-temperature hydrothermal aging" to evaluate the failure progress of conventional impellers under the selected working conditions. The impeller selection margin is moderate, and the selection is more scientific. While ensuring that the performance meets the specified service life, the size of the impeller and dehumidification equipment is reduced, reducing equipment investment and floor space. The selection test adds "accelerated high-temperature hydrothermal aging" to estimate the service life of newly developed dehumidification impeller types.

[0112] In order to solve the problem of unreasonable wheel size and operating parameters selected based on dehumidification performance coefficient DCOP in existing selection, the dehumidification capacity per unit electricity and dehumidification capacity per unit volume per unit electricity were proposed. The optimal value for dehumidification wheel selection was given to measure the wheel dehumidification energy efficiency and the most advantageous wheel size, making the selection more convenient, efficient and reasonable.

[0113] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A dehumidification wheel selection test method, characterized in that: include: Step S1, establishing a functional relationship among processing wind speed, regeneration wind speed, processing air volume, regeneration air volume, rotor diameter, and partition ratio, and clarifying the selection conditions; Step S2, assembling each test unit and configuring the selected working condition: configuring equivalent working conditions according to the processing inlet temperature and humidity, and realizing alternating adsorption-regeneration under adsorption and desorption wind speed; Step S3, adjust the wheel type, thickness and operating parameters, operate the equipment and achieve stability, the processing and regeneration pressure drops are not higher than the selection setting requirements, and the dehumidification capacity per unit time is not lower than the selection requirements.

2. The dehumidification wheel selection and testing method according to claim 1, characterized in that: In the step S1, the clear selection condition includes: Establish the functional relationship between the treatment wind speed and the treatment air volume, the rotor diameter, and the treatment partition ratio; establish the functional relationship between the regeneration wind speed and the regeneration air volume, the rotor diameter, and the regeneration partition ratio; Clarify the treatment air volume, desorption air volume, inlet temperature and humidity, and dehumidification requirements, match the treatment and regeneration air volumes selected according to needs with different impeller diameters, and convert multiple groups of equivalent wind speeds, i.e., test treatment wind speed and test regeneration wind speed.

3. The dehumidification wheel selection and testing method according to claim 1 or 2, characterized in that: Each test unit comprises a wheel test chamber, in which a wheel block is arranged; a treatment air inlet and a regeneration air outlet are arranged on one side of the wheel test chamber, and a treatment air outlet and a regeneration air inlet are arranged on the other side of the wheel test chamber; pressure difference testers are arranged on opposite sides of the wheel block; The processed air inlet path includes a first temperature and humidity tester and a first air volume controller which are arranged in sequence; The processed air outlet path includes a second temperature and humidity tester; The regeneration air inlet path includes a second air volume controller, a third temperature and humidity tester, an electric heater and a temperature tester arranged in sequence; a steam pipeline is also connected to the pipeline between the third temperature and humidity tester and the electric heater, and the steam pipeline includes a steam generator and a third air volume controller arranged in sequence; The regeneration air outlet path includes a fourth temperature and humidity tester.

4. The dehumidification wheel selection and testing method according to claim 3, characterized in that: The configuration and selection conditions include: Equivalent operating conditions are configured according to the temperature and humidity of the treatment inlet of the treatment air inlet and the regeneration inlet of the regeneration air inlet, and the equivalent operating conditions include equivalent wind speed, temperature and humidity. The test treatment air volume and the test regeneration air volume are calculated according to the equivalent wind speed, and continuous alternation of adsorption and regeneration is achieved through two groups of air volume controllers, namely the first air volume controller and the second air volume controller.

5. The dehumidification wheel selection and testing method according to claim 4, characterized in that: In step S1, the configuration and parameters of each test unit are adjusted so that the test unit can operate stably as a whole and the dehumidification capacity per unit time is not less than the selection requirements, including: The wheel type, wheel size and operating parameters are adjusted, and the test unit is operated to achieve stable adsorption and desorption.

6. The dehumidification wheel selection and testing method according to claim 5, characterized in that: The adjusting of the wheel type, wheel size and operating parameters, operating the test unit and achieving stable adsorption and desorption includes: Under the condition that the wind resistance does not exceed the pressure drop, the rotor thickness, equivalent processing wind speed, equivalent regeneration wind speed, regeneration temperature, adsorption-desorption alternation time, and adsorption-desorption time ratio are used as variables for debugging. After a certain period of adsorption and desorption, the adsorption-desorption equilibrium is reached, and the corresponding variable parameters are recorded. The average dehumidification capacity per unit time (g (water) / kg (air)) is calculated. The corresponding average dehumidification capacity is not lower than the selection requirements.

7. The dehumidification wheel selection and testing method according to claim 6, characterized in that: In step S3, after the selection is qualified, the dehumidification capacity per unit electricity and the dehumidification capacity per unit volume are calculated to give the optimal value for the dehumidification wheel selection; according to the optimal value, the wheel thickness, partition and other structural selections, as well as the parameters of the rotation speed, processing and regeneration wind speed, and regeneration temperature are completed.

8. The dehumidification wheel selection and testing method according to claim 1 or 2, characterized in that: The test method also includes: Step S4, subjecting the rotating wheel of the test unit to hydrothermal aging and / or thermal aging conditions and then performing another working condition test to determine the attenuation degree; Step S5, calculate the dehumidification capacity per unit electricity, the dehumidification capacity per unit volume and the test equivalent wind speed; complete the selection of structural parameters and operating parameters according to the optimal values ​​of the dehumidification capacity per unit electricity and / or the dehumidification capacity per unit volume.

9. The dehumidification wheel selection and testing method according to claim 8, characterized in that: The step S5 specifically includes: If the attenuation degree is less than the preset value, the dehumidification capacity per unit electricity and the dehumidification capacity per unit volume are calculated according to the selected working conditions and the configuration and parameters of each test unit; the test equivalent wind speed is calculated, and the selection of the wheel structure size or type parameters and operating parameters is completed according to the optimal value of the dehumidification capacity per unit electricity and / or the dehumidification capacity per unit volume.

10. The dehumidification wheel selection and testing method according to claim 8, characterized in that: In step S4, the step of subjecting the rotating wheel of the test unit to hydrothermal aging and / or thermal aging conditions and then performing another operating test to determine the attenuation degree includes: A rotor test chamber is constructed, and high-temperature and high-humidity gas is passed into the rotor test chamber to simulate the rotor operation failure condition, and the hydrothermal aging temperature is higher than the normal regeneration temperature to accelerate aging.

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