Method for evaluating mechanical strength of granular adsorbent

Abstract

The invention belongs to the technical field of detection, and particularly relates to a method for evaluating the mechanical strength of a granular adsorbent, which comprises the following steps: acquiring or measuring the liquid washing powder falling rate of the adsorbent; obtaining or determining the swelling ratio of the adsorbent; obtaining or measuring the pressurized water permeability of the adsorbent; and comprehensively evaluating the mechanical strength of the adsorbent according to the liquid washing powder falling rate, the swelling rate and the pressurized permeable rate. The testing method disclosed by the invention is simple and feasible, and is suitable for batch detection and quality control of industrial adsorbents.

Description

Technical Field

[0001] The present invention belongs to the technical field of detection, and particularly relates to a method for evaluating the mechanical strength of granular adsorbents. Background Art

[0002] Granular adsorbents are widely used in the fields of chemical engineering, environmental protection, new energy, etc. In industrial applications, adsorbent particles need to have sufficient mechanical strength to resist wear and breakage, otherwise it will lead to an increase in powder loss and an increase in bed pressure drop, affecting the operating efficiency of the adsorption tower. The key to the mechanical strength of the adsorbent lies in the shedding of effective powder during the operation of the adsorbent under actual working conditions and the influence of the deformation of the adsorbent on the performance of the granular adsorbent. Therefore, developing an accurate and reliable method for measuring the mechanical strength of granular adsorbents is of great significance for optimizing the preparation process of the adsorbent and improving its industrial application performance.

[0003] Deficiencies of existing measurement methods: (1) Single test conditions: Most existing methods use static tests and cannot simulate the dynamic stress of the adsorbent under actual working conditions (such as liquid scouring in a fixed bed). (2) Isolated test indicators: Existing methods usually only focus on a single performance indicator (such as compressive strength or wear rate) and do not comprehensively consider the multi-factor coupling effect of the adsorbent in actual applications. (3) Lack of working condition matching: Existing test methods do not fully consider the performance changes of the adsorbent under complex environments such as high pressure and swelling, resulting in a large deviation between the test results and actual working conditions. (4) Insufficient standardization: The test equipment, parameters, and conditions used in different studies vary greatly, making it difficult to compare the test results horizontally and lacking a unified evaluation standard.

[0004] Therefore, the test results may not fully reflect the durability and stability of the adsorbent under actual operating conditions. Some test methods may have problems such as low accuracy or poor experimental reproducibility, which also limits their effectiveness and reliability. Summary of the Invention

[0005] In order to overcome the problems of single test conditions, isolated indicators, and poor working condition matching in existing test methods, the present invention provides a method for evaluating the mechanical strength of granular adsorbents. Through the comprehensive evaluation of three indicators: the powder loss rate by liquid scouring, the swelling rate, and the water permeability rate under pressure, it provides a scientific and reliable basis for the performance evaluation of the adsorbent in industrial applications.

[0006] Aiming at the above-mentioned disadvantages, the objectives of the present invention are summarized as follows:

[0007] (1) Provide a high-precision measurement method: Develop a measurement method that can more accurately reflect the mechanical strength of granular adsorbents under actual working conditions and improve the reliability and repeatability of the measurement results.

[0008] (2) Consider the influence of particle characteristics: In the measurement method, fully consider the influence of factors such as the shape, particle size, and particle size distribution of the particles on the mechanical strength, so that the measurement results are more targeted and practical.

[0009] (3) Adapt to complex working conditions: Compared with the existing technology, the liquid erosion powder loss rate test of the present invention can more accurately reflect the mechanical strength of the adsorbent under dynamic stress by simulating the liquid erosion process in the actual working conditions.

[0010] (4) Optimize the adsorbent preparation process: By accurately measuring the mechanical strength of the granular adsorbent, provide a scientific basis for optimizing the adsorbent preparation process, and improve the service life and performance stability of the adsorbent.

[0011] The present invention provides a method for evaluating the mechanical strength of a granular adsorbent, including:

[0012] Obtain or measure the liquid erosion powder loss rate of the adsorbent;

[0013] Obtain or measure the swelling rate of the adsorbent;

[0014] Obtain or measure the pressure-permeability rate of the adsorbent;

[0015] Comprehensively evaluate the mechanical strength of the adsorbent according to the liquid erosion powder loss rate, the swelling rate, and the pressure-permeability rate.

[0016] Furthermore, measure the liquid erosion powder loss rate of the adsorbent according to the liquid erosion powder loss rate test.

[0017] Furthermore, measure the swelling rate of the adsorbent according to the swelling rate test.

[0018] Furthermore, the pressure-permeability rate is measured by a test device, and the test device includes:

[0019] A feed inlet, a screw, a sealed chamber, a discharge outlet, and a pressure sensor;

[0020] The feed inlet and the discharge outlet are located at both ends of the sealed chamber; the pressure sensor is connected to the screw; the screw penetrates the feed inlet so that one end of the screw is inside the sealed chamber; the screw contains a hollow channel.

[0021] Furthermore, the discharge outlet of the test device further includes a sintered filter.

[0022] Furthermore, the test device measures the pressure-permeability rate of the adsorbent by the following method:

[0023] Add the first sample of the adsorbent to be measured and brine into the sealed chamber from the feed port. After reaching the set time, drain the brine from the discharge port. Obtain the adsorption capacity before pressurization through the volume difference between the brine inlet and outlet, and discharge the first sample of the adsorbent to be measured.

[0024] Add the second sample of the adsorbent to be measured and brine into the sealed chamber from the feed port. Apply a set pressure to the adsorbent through the screw. After reaching the set time, drain the brine from the discharge port. Obtain the adsorption capacity after pressurization through the volume difference between the brine inlet and outlet.

[0025] Obtain the water permeability rate under pressure of the adsorbent to be measured through the adsorption capacity before pressurization and the adsorption capacity after pressurization.

[0026] Furthermore, the set pressure is 0.3 - 0.7 Mpa, and the time is set to 1 - 2 hours.

[0027] Furthermore, the formula for the comprehensive evaluation is as follows:

[0028] M = a×W α ×b×S β ×c×K γ / 10 4 ;

[0029] Wherein, M is the evaluation score; W, S, and K are the powder loss rate by liquid erosion, swelling rate, and water permeability rate under pressure respectively; a, b, and c are the weights of the powder loss rate by liquid erosion, swelling rate, and water permeability rate under pressure respectively; α, β, and γ are the influencing factors of the powder loss rate by liquid erosion, swelling rate, and water permeability rate under pressure respectively.

[0030] Furthermore, the weights of the powder loss rate by liquid erosion, swelling rate, and water permeability rate under pressure adopt one set of values from "0.3, 0.3, 0.4", "0.2, 0.2, 0.6", "0.25, 0.25, 0.5", "0.35, 0.35, 0.3", "0.4, 0.4, 0.2".

[0031] Furthermore, the influencing factors of the powder loss rate by liquid erosion, swelling rate, and water permeability rate under pressure adopt one set of values from "0.8, 0.4, 1.5", "0.7, 0.4, 1.4", "0.6, 1.3, 1.3", "1.0, 0.7, 1.7".

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0033] (1) In line with the actual working conditions: In the method of the present invention, the swelling rate test and the water permeability rate test under pressure fully consider the performance changes of the adsorbent in complex environments such as high pressure and swelling, ensuring that the test results are highly matched with the actual working conditions.

[0034] (2) Scientificity: The method adopted in the present invention does not depend on the testing equipment and the morphology of the adsorbent, and the testing error is less than 5%, far lower than the error of more than 15% in the prior art.

[0035] (3) Practicality: The testing method of the present invention is simple and easy to implement, and is applicable to the batch detection and quality control of industrial adsorbents.

[0036] (4) The present invention provides a unified evaluation standard, which is convenient for horizontal comparison of different test results. Description of the Drawings

[0037] Figure 1 It is a flow chart of an embodiment of the present invention.

[0038] Figure 2 It is a schematic diagram of a device for measuring the pressure permeation rate in an embodiment of the present invention. Detailed Embodiments

[0039] The present invention will be further described in detail below with reference to the drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0040] In the first aspect of this embodiment, a method for evaluating the mechanical strength of granular adsorbents is provided. Through the comprehensive evaluation of three indicators: the powder loss rate by liquid flushing, the swelling rate, and the pressure permeation rate, it provides a scientific and reliable performance evaluation basis for the industrial application of adsorbents. The specific process is as Figure 1 shown.

[0041] This embodiment further provides a method for measuring the powder loss rate by liquid flushing.

[0042] Weigh 40 - 60 g of the adsorbent sample (there should be no air bubbles in the adsorbent layer, and read the value after tamping). Transfer all the adsorbent in the graduated cylinder to the drum with 40 - 60 mL of brine, and add 10 porcelain balls. Tighten the cylinder cover. Install the drum on the ball mill and rotate it at a speed of 60 rpm for the adsorbent to roll and grind for 40 min ± 2 s. Remove the graduated cylinder, open the cover, transfer all the adsorbent to the test sieve cloth, shake off the moisture, spread it out flat, and dry it at 60°C or let it dry naturally at room temperature until the particles can roll freely. Separate the adsorbent with a sieve to separate the intact particles and the broken particles. Place the intact particles and the broken particles in weighing bottles respectively and weigh them on an analytical balance.

[0043] Quantitative index: Powder loss rate by liquid flushing where m0 is the initial mass of the adsorbent, and m t is the mass of the intact particles. (The mass ratio of the broken particles and the lost powder after liquid dynamic flushing)

[0044] This embodiment further provides a method for measuring the swelling rate.

[0045] Testing devices: graduated cylinder, constant temperature water bath.

[0046] Testing conditions: brine temperature 25°C, adsorbent sample volume ≥ 100 mL.

[0047] Testing steps: Add at least 100 mL of granular adsorbent sample into a graduated cylinder. Add sufficient brine into the graduated cylinder to submerge the adsorbent, and record the initial volume of the adsorbent. Measure the volume change of the sample every 30 minutes. When the volume change rate is ≤ 1% for three consecutive measurements, it is considered swelling equilibrium.

[0048] Quantification index: swelling rate Among them, Vt is the volume after swelling equilibrium, and V0 is the initial volume.

[0049] This embodiment further provides a device for measuring the pressurized water permeability rate, as Figure 2 shown, including a feed inlet 1, a screw 2, a sealed chamber 3, a display 4, a pressure sensor 5, a discharge outlet 6, a sand core 7, and a precision constant flow pump 8.

[0050] Reference Figure 2 , in the device for measuring the pressurized water permeability rate, the feed inlet and the discharge outlet are located at both ends of the sealed chamber. The pressure sensor is connected to the screw. The screw passes through the feed inlet, and one end of the screw is inside the sealed chamber. The screw contains a hollow channel. In this embodiment, the feed inlet and the discharge outlet are respectively externally connected to a feed inlet pipeline and a discharge outlet pipeline. The feed inlet pipeline is connected to a precision constant flow pump. The pressure sensor is connected to a display. A 100-mesh sand core is arranged at the discharge outlet.

[0051] This embodiment further provides a method for using the device for measuring the pressurized water permeability rate. Flow the first sample of granular adsorbent to be measured and brine into the feed inlet pipeline through a precision constant flow pump, and further flow through the feed inlet and the hollow channel of the screw into the sealed chamber. Keep the brine in a wetting state covering the granular adsorbent. After one hour, drain the brine from the discharge outlet pipeline. The granular adsorbent is intercepted by the 100-mesh sand core. Obtain the adsorption capacity Q0 before pressurization through the volume difference between the inflow and outflow of the brine, and discharge the first sample of granular adsorbent to be measured. Flow the second sample of granular adsorbent to be measured and brine into the feed inlet pipeline through a precision constant flow pump, and further flow through the feed inlet and the hollow channel of the screw into the sealed chamber. Keep the brine in a wetting state covering the granular adsorbent. Apply a pressure of 0.3 - 0.7 Mpa to the granular adsorbent through the screw for 1 hour. After one hour, keep the set pressure and drain the brine from the discharge outlet pipeline. The granular adsorbent is intercepted by the 100-mesh sand core. Obtain the adsorption capacity Q after pressurization through the volume difference between the inflow and outflow of the brine t . Further calculate the pressurized water permeability rate K,

[0052] In this embodiment, according to the test results of the liquid flushing powder removal rate (W), swelling rate (S), and pressurized water permeability rate (K), the mechanical strength of the granular adsorbent is comprehensively evaluated by the product coupling model method. The comprehensive score M = a×(100 - W) α ×b×(100 - S) β ×c×K γ / 10 3 , where M is the evaluation score; W, S, and K are the liquid flushing powder removal rate, swelling rate, and pressurized water permeability rate respectively; a, b, and c are the weights of the liquid flushing powder removal rate, swelling rate, and pressurized water permeability rate respectively; α, β, and γ are the influencing factors of the liquid flushing powder removal rate, swelling rate, and pressurized water permeability rate respectively. Through verification by multiple groups of orthogonal experiments, the weight coefficients are a = 0.3, b = 0.3, c = 0.4, and the influencing factors are α = 0.8, β = 0.5, γ = 1.5, which can optimally reflect the mechanical strength under actual working conditions. The higher the score, the better the mechanical strength of the adsorbent.

[0053] The second aspect of the present invention discloses test examples and comparative examples using the method of the present invention.

[0054] Test Example 1. Determination of the mechanical strength of spherical granular adsorbent

[0055] Test sample: Spherical adsorbent particles (particle size 2 - 3 mm).

[0056] (1) Test of liquid flushing powder removal rate (W)

[0057] Test conditions: Test temperature 25°C, rolling and grinding time 40 min ± 2 s, adsorbent drying temperature 60°C.

[0058] Test results: The initial mass of the adsorbent is 40 g, the amount of brine used is 40 mL, the mass of the intact particles after the test is 34.2 g, the mass of the broken particles is 5.8 g, and the liquid flushing powder removal rate is 14.5%.

[0059] (2) Test of swelling rate (S)

[0060] Test conditions: Test temperature 25°C, test medium is a certain salt lake brine.

[0061] Test results: The initial volume of the adsorbent is 150 mL, the volume after swelling equilibrium is 157.8 mL, and the swelling rate is 5.2%.

[0062] (3) Test of pressurized water permeability rate (K)

[0063] Test conditions: Test pressure 0.5 MPa, test temperature 25°C, test time 2 hours.

[0064] Test results: 50 mL of adsorbent, pressure sensor reading of 0.5 MPa. The measured adsorption capacity without pressure is 3.64 g / L, and the measured adsorption capacity after pressure is 3.03 g / L. The pressure water permeability is 83.2%.

[0065] (4) Comprehensive evaluation

[0066] Multiple groups of orthogonal tests were carried out to obtain the weight coefficients and influence factors. According to existing knowledge, it is estimated that the weight coefficients of liquid erosion powder loss rate, swelling rate, and pressure water permeability are one of "0.3, 0.3, 0.4", "0.2, 0.2, 0.6", "0.25, 0.25, 0.5", "0.35, 0.35, 0.3", "0.4, 0.4, 0.2"; the influence factors of liquid erosion powder loss rate, swelling rate, and pressure water permeability are one of "0.8, 0.4, 1.5", "0.7, 0.4, 1.4", "0.6, 1.3, 1.3", "1.0, 0.7, 1.7". In this test example, the results of some orthogonal tests are disclosed.

[0067] M1 = 0.3×(100 - 14.5)^0.8×0.3×(100 - 5.2)^0.5×0.4×(83.2^1.5) / 10 4 = 93.68%

[0068] M2 = 0.2×(100 - 14.5)^0.7×0.2×(100 - 5.2)^0.4×0.6×(83.2^1.4) / 10 4＝ 62.28%

[0069] M3 = 0.35×(100 - 14.5)^0.7×0.35×(100 - 5.2)^0.4×0.3×(83.2^1.4) / 10 4 = 24.91%

[0070] M4 = 0.25×(100 - 14.5)^0.8×0.25×(100 - 5.2)^0.5×0.5×(83.2^1.5) / 10 4 = 81.09%

[0071] M5 = 0.4×(100 - 14.5)^0.6×0.4×(100 - 5.2)^1.3×0.2×(83.2^1.3) / 10 4 = 537.43%

[0072] M6 = 0.3×(100 - 14.5)^1.0×0.3×(100 - 5.2)^0.7×0.4×(83.2^1.7) / 10 4 = 1368.46%

[0073] After the granular adsorbent operates for a hundred cycles under actual working conditions, the capacity reduction rate is 10%, indicating that its actual strength is 90%. By comparing all test results with the actual strength, the weight coefficients a is 0.3, b is 0.3, c is 0.4, and the influencing factors α is 0.8, β is 0.5, γ is 1.5 are further obtained.

[0074] Test Example 2. Determination of the mechanical strength of rod-shaped granular adsorbent

[0075] Test sample: Rod-shaped adsorbent particles (particle length 1.5 mm, particle diameter 0.5 mm).

[0076] (1) Test of the powder loss rate (W) by liquid flushing

[0077] Test conditions: Test temperature 25°C, rolling and grinding time 40 min ± 2 s, adsorbent drying temperature 60°C.

[0078] Test results: The initial mass of the adsorbent is 50 g, the amount of brine used is 50 mL. After the test, the mass of the intact particles is 31.95 g, the mass of the broken particles is 8.05 g, and the powder loss rate by liquid flushing is 16.1%.

[0079] (2) Test of the swelling ratio (S)

[0080] Test conditions: Test temperature 25°C, test medium is brine from a certain salt lake.

[0081] Test results: The initial volume of the adsorbent is 200 mL, and the volume after swelling equilibrium is 210.4 mL. The swelling ratio is 5.2%.

[0082] (3) Test of the pressure permeation rate (K)

[0083] Test conditions: Test pressure 0.5 MPa, test temperature 25°C.

[0084] Test results: The volume of the adsorbent is 50 mL, the reading of the pressure sensor is 0.5 MPa. The adsorption capacity measured without pressure is 4.18 g / L, and the adsorption capacity measured after pressure is 3.77 g / L. The pressure permeation rate is 90.2%.

[0085] (4) Comprehensive evaluation

[0086] M = 0.3×(100 - 16.1)^0.8×0.3×(100 - 5.2)^0.5×0.4×(90.2^1.5) / 10 4 = 103.87%.

[0087] After the granular adsorbent operates for 100 cycles under actual working conditions, the capacity reduction rate is 3%, indicating that its actual strength is 97%, and the test result of this method is 93.6%. Therefore, the test error is 6.87%.

[0088] Test Example 3. Mechanical Strength Test of Adsorbent in Industrial Operation

[0089] Test sample: Ellipsoidal granular adsorbent in industrial operation of a certain salt lake production enterprise (grain length 2 - 3 mm, particle diameter 1 - 2 mm).

[0090] (1) Test of powder loss rate (W) by liquid scouring

[0091] Test conditions: Test temperature 25°C, rolling and grinding time 40 min ± 2 s, adsorbent drying temperature 60°C.

[0092] Test results: The initial mass of the adsorbent is 60 g, the amount of brine used is 60 mL, the mass of the intact particles after the test is 55.26 g, the mass of the broken particles is 4.74 g, and the powder loss rate by liquid scouring is 7.9%.

[0093] (2) Test of swelling ratio (S)

[0094] Test conditions: Test temperature 25°C, test medium is brine from a certain salt lake.

[0095] Test results: The initial volume of the adsorbent is 300 mL, the volume after swelling equilibrium is 306.7 mL, and the swelling ratio is 2.2%.

[0096] (3) Test of pressure - permeation rate (K)

[0097] Test conditions: Test pressure 0.5 MPa, test temperature 25°C.

[0098] Test results: The volume of the adsorbent is 50 mL, the reading of the pressure sensor is 0.7 MPa. The adsorption capacity measured without pressure is 3.96 g / L, and the adsorption capacity measured after pressure is 3.24 g / L. The pressure - permeation rate is 81.5%.

[0099] (4) Comprehensive evaluation

[0100] Comprehensive score = 0.3×(100 - 7.9)^0.8×0.3×(100 - 2.8)^0.5×0.4×(81.5^1.5) / 103 = 97.3%.

[0101] After the granular adsorbent operates for 100 cycles under actual working conditions, the capacity reduction rate is 6%, indicating that its actual strength is 94%, and the test result of this method is 98.2%. Therefore, the test error is 3.3%.

[0102] To prove the superiority of the present invention over the prior art, several comparative examples are added in the implementation section to show the comparison results between the testing methods of the prior art and the method of the present invention.

[0103] Comparative Example 1. Static compressive strength test in the prior art

[0104] Test sample: Spherical adsorbent particles (particle size 2 - 3 mm).

[0105] Test method: Use a material compressive strength tester to only test the compressive strength of the adsorbent particles. Gradually increase the pressure until the particles break, and record the maximum pressure.

[0106] Test conditions: Test temperature 25°C.

[0107] Test results: The longitudinal average compressive strength of the adsorbent particles is 51 N, and the radial average compressive strength is 37 N.

[0108] Comparative analysis: The prior art only tests the compressive strength of the adsorbent, without considering the test error caused by the morphology of the granular adsorbent. Moreover, the test results cannot be compared with particles of its morphology. In addition, the data measured by this method does not reflect the actual compressive strength of the granular adsorbent during operation. Therefore, the indicators measured by this method are quite different from the actual situation.

[0109] Comparative Example 2. Abrasion rate test in the prior art

[0110] Test sample: Rod-shaped adsorbent particles (particle length 1.5 mm, particle size 0.5 mm).

[0111] Test method: Use an abrasion tester to test the abrasion rate of the adsorbent particles under dry conditions. Start the abrasion tester and set the test time and rotation speed. Under dry conditions, the abrasion wheel continuously rubs the adsorbent particles.

[0112] Test conditions: Test time 40 min, load pressure 500 g, test temperature 25°C.

[0113] Test results: The abrasion rate of the adsorbent particles is 13%.

[0114] Comparative analysis: The prior art only tests the abrasion rate of the adsorbent, without considering the powder loss caused by the scouring of the liquid on the granular adsorbent under actual operating conditions, and the crushing situation of the particles during operation, resulting in the test results being unable to fully reflect the mechanical properties of the adsorbent under actual conditions.

[0115] Comparative Example 3. Pressurized water permeability test in the prior art

[0116] Test sample: Spherical adsorbent particles (particle size 2 - 3 mm).

[0117] Testing method: The variable-head test is a commonly used method for testing the water permeability under pressure, which is applicable to testing the water permeability of granular adsorbents. Its basic principle is to measure the seepage velocity of water in the adsorbent by controlling the change of the head height. The specific steps are as follows: Load the granular adsorbent into the test container to ensure uniform filling of the adsorbent. Apply a certain head pressure above the container, and calculate the water permeability by measuring the change of the head height over time.

[0118] Testing conditions: Test pressure: 0.3 MPa. Test temperature: 25 °C.

[0119] Testing results: The water permeability under pressure of the adsorbent particles is 93%.

[0120] Comparative analysis: The existing technology only tests that the operation of the variable-head test is relatively complex, which requires precise control of the change of the head and real-time recording of the seepage water volume and time. The professional knowledge and skill level of the operator have a direct impact on the accuracy of the measurement results. In addition, this method can only reflect the permeation rate of the liquid in the compacted adsorbent, cannot reflect the contact situation between each adsorbent particle and the liquid after pressurization, and cannot directly reflect the degree of reduction of the adsorbent performance after pressurization.

[0121] It can be seen from the above comparative examples that the existing technology cannot comprehensively reflect the mechanical properties of the adsorbent under actual working conditions. While the testing method of the powder elution rate by liquid scouring in the present invention usually only focuses on the comprehensive evaluation of single performance indicators (such as compressive strength, wear rate, swelling rate or water permeability under pressure), swelling rate and water permeability under pressure, and can more comprehensively investigate the actual mechanical strength of the granulated adsorbent.

[0122] The test result errors of the mechanical strength of the samples in Test Examples 1-3 and Comparative Examples 1-3 are shown in Table 1.

[0123] Table 1

[0124]

Claims

1. A method for evaluating the mechanical strength of a granular adsorbent, comprising: Obtaining or measuring the powder loss rate of the adsorbent due to liquid scouring; Obtaining or measuring the swelling rate of the adsorbent; Obtaining or measuring the pressurized water permeability of the adsorbent; Comprehensively evaluating the mechanical strength of the adsorbent based on the powder loss rate of the liquid scouring, the swelling rate, and the pressurized water permeability.

2. The method according to claim 1, wherein Measuring the powder loss rate of the liquid scouring of the adsorbent according to the powder loss rate test of the liquid scouring.

3. The method according to claim 1, characterized in that, Measuring the swelling rate of the adsorbent according to the swelling rate test.

4. The method according to claim 1, wherein The pressurized water permeability is measured by a test device, and the test device includes: A feed inlet, a screw, a sealed chamber, a discharge outlet, and a pressure sensor; The feed inlet and the discharge outlet are located at both ends of the sealed chamber; the pressure sensor is connected to the screw; the screw passes through the feed inlet so that one end of the screw is inside the sealed chamber; the screw contains a hollow channel.

5. The method according to claim 4, characterized in that, The discharge outlet of the test device further includes a sintered filter.

6. The method according to claim 4, wherein The test device measures the pressurized water permeability of the adsorbent by the following method: Adding the first sample of the adsorbent to be measured and brine into the sealed chamber from the feed inlet, discharging the brine from the discharge outlet after reaching the set time, obtaining the adsorption capacity before pressurization through the volume difference of the brine discharged and received, and discharging the first sample of the adsorbent to be measured; Adding the second sample of the adsorbent to be measured and brine into the sealed chamber from the feed inlet, applying a set pressure to the adsorbent through the screw, discharging the brine from the discharge outlet after reaching the set time, and obtaining the adsorption capacity after pressurization through the volume difference of the brine discharged and received; Obtaining the pressurized water permeability of the adsorbent to be measured through the adsorption capacity before pressurization and the adsorption capacity after pressurization.

7. The method according to claim 6, wherein The set pressure is 0.3 - 0.7 Mpa, and the time is set to 1 - 2 hours.

8. The method according to claim 1, wherein The formula for the comprehensive evaluation is as follows: M = a × (100 - W) α × b × (100 - S) β × c × K γ / 10 4 ; Where M is the evaluation score; W, S, and K are the powder loss rate of the liquid scouring, the swelling rate, and the pressurized water permeability respectively; a, b, and c are the weights of the powder loss rate of the liquid scouring, the swelling rate, and the pressurized water permeability respectively; α, β, and γ are the influencing factors of the powder loss rate of the liquid scouring, the swelling rate, and the pressurized water permeability respectively.

9. The method according to claim 8, characterized in that, The weights of the powder loss rate of the liquid scouring, the swelling rate, and the pressurized water permeability adopt one set of "0.3, 0.3, 0.4", "0.2, 0.2, 0.6", "0.25, 0.25, 0.5", "0.35, 0.35, 0.3", "0.4, 0.4, 0.2".

10. The method according to claim 8, wherein The influencing factors of the powder loss rate of the liquid scouring, the swelling rate, and the pressurized water permeability adopt one set of "0.8, 0.4, 1.5", "0.7, 0.4, 1.4", "0.6, 1.3, 1.3", "1.0, 0.7, 1.7".

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