Apparatus and method for removing free water from ion exchange resin

Abstract

The application discloses a device and method for removing free water in ion exchange resin, wherein a water collecting groove is sleeved on the driving shaft of the motor in the main body of the low-speed centrifuge, a horizontal rotor is fixed on the driving shaft of the motor, the horizontal rotor is located in the water collecting groove, a through hole is formed in the centrifugal tube, and the centrifugal tube is lapped on the horizontal rotor; when the main body of the low-speed centrifuge is not started, the centrifugal tube is distributed in the vertical direction and the bottom is left with a gap from the bottom of the water collecting groove; when the main body of the low-speed centrifuge is started, the centrifugal tube is in a horizontal state, the two ends of the centrifugal tube are respectively left with a gap from the inner wall of the water collecting groove and the horizontal rotor, the centrifuged water is thrown out of the through hole of the centrifugal tube and enters the water collecting groove, the removal of the free water in the ion exchange resin can be completed, the external free water and the internal water can be automatically and efficiently separated completely, the operation is convenient, the conditions are controllable, and the result is stable.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ion exchange resin performance testing, in particular to a device and method for removing free water from ion exchange resin. BACKGROUND

[0002] Ion exchange resin particles used in the field of water treatment contain a certain amount of water inside, part of which is combined with active groups, and the other part is adsorbed on the surface of the resin or retained in the void. When ion exchange resin is shipped, a proper amount of desalted water is added before packaging to prevent internal water loss and damage. In addition, ion exchange resin is also used in various water or solutions. In the field of ion exchange resin physicochemical performance testing, such as determination of water content, exchange capacity, iron content, impurity content, and regeneration transformation rate, a certain amount of ion exchange resin sample must be weighed on a balance for subsequent testing. Before weighing, the free water outside the sample must be removed, and the internal water must be kept from being lost, otherwise it will directly affect the accuracy of the physicochemical performance test results.

[0003] Currently, there are three main methods for removing free water from ion exchange resin: one is the filter paper drying method, which is to place ion exchange resin particles on filter paper and roll back and forth to absorb external free water. The advantage of this method is that it does not require additional equipment, and the cost is low. The disadvantage is that the operation time is long, labor-intensive, and the process is uncontrollable, so the result stability is poor. The second method is filtration, which is to place ion exchange resin particles in a Buchner funnel and separate external free water by vacuum filtration. This method is widely used in ASTM standards, with the advantages of high efficiency and saving part of the labor cost. The disadvantage is that it is easily affected by the filtration conditions, but the conditions are uncontrollable, and the external free water may not be completely removed. The third method is centrifugation, which is to place ion exchange resin in a glass centrifuge tube, set a sand core in the tube to make water flow out and prevent ion exchange resin particles from leaking out, then place the centrifuge tube into the sample outer sleeve of the horizontal rotor, and start the centrifuge to separate the free water by centrifugal force. This method is widely used in domestic standards, including GB / T 5757-2008 "Ion Exchange Resin Water Content Determination Method" and GB / T 5759-2000 "Oxygen Oxygen Type Anion Exchange Resin Water Content Determination Method". The advantages of centrifugation are high efficiency, simultaneous processing of multiple samples, controllable conditions, and good result stability. The disadvantage of centrifugation is that ion exchange resin particles are easily stuck in the sand core and are difficult to clean. If there is too much residue, it will cause blockage, affecting water flow and incomplete separation of free water. In addition, after the free water flows out and accumulates at the bottom of the sample outer sleeve, if the water is too much and exceeds the height of the sand core at the bottom of the centrifuge tube, or if the centrifuge tube is not handled properly when it is taken out, the water will re-enter the ion exchange resin layer, causing the experiment to fail. SUMMARY

[0004] In view of the problems in the prior art, the device and method for removing free water of ion exchange resin are provided to solve the problem that the existing centrifugal method cannot completely separate free water due to human operation errors, and can automatically and efficiently completely separate external free water and internal water, is convenient to operate, the conditions are controllable, and the stability of the result is good.

[0005] The present application is realized by the following technical solutions:

[0006] A device for removing free water of ion exchange resin, comprising a centrifugal tube, a horizontal rotor and a low-speed centrifuge main body:

[0007] A water collecting groove is sleeved on the driving shaft of the motor in the low-speed centrifuge main body, the horizontal rotor is fixed on the driving shaft of the motor, and the horizontal rotor is located in the water collecting groove; a through hole for draining water is formed in the centrifugal tube, and the centrifugal tube is used for loading ion exchange resin whose free water is to be removed;

[0008] The centrifugal tube is lapped on the horizontal rotor, when the low-speed centrifuge main body is not started, the centrifugal tube is distributed in the vertical direction and the bottom is left with a gap from the bottom of the water collecting groove, when the low-speed centrifuge main body is started, the centrifugal tube is in a horizontal state, and the two ends of the centrifugal tube are left with gaps from the inner wall of the water collecting groove and the horizontal rotor.

[0009] Further improvement of the present application is:

[0010] The water collecting groove is a hollow circular ring structure, a sleeve is arranged at the center of the water collecting groove, the driving shaft of the motor is fixed to penetrate through the sleeve from bottom to top, the center of the horizontal rotor is fixed to be sleeved on the driving shaft of the motor from top to bottom, the upper end surface of the sleeve and the lower end surface of the horizontal rotor are left with a spacing, the upper end surface of the horizontal rotor is lower than the upper end surface of the driving shaft of the motor, and the upper end surface of the driving shaft of the motor is lower than the upper end surface of the water collecting groove.

[0011] The centrifugal tube is a cylindrical tube, and the bottom and the top of the centrifugal tube are both provided with an open structure.

[0012] The centrifugal tube is provided with a horizontally distributed bottom plate at a distance of 0.5 cm to 1.5 cm from the bottom, a first through hole is formed in the bottom plate, and a second through hole is arranged on the lower part of the wall of the centrifugal tube.

[0013] The first through hole and the second through hole are both long strip-shaped through holes, the length is 1 mm to 2 mm, and the width is 0.1 mm to 0.2 mm.

[0014] The first through hole is uniformly formed in the bottom plate in 6 to 9 vertical rows, the second through hole is arranged in 3 to 5 horizontal rows on the wall of the centrifugal tube, all the first through holes are parallel to each other, and all the second through holes are parallel to each other.

[0015] The centrifugal tube is a grooved centrifugal tube or a basket centrifugal tube, the top of the grooved centrifugal tube is provided with a first convex ring extending downward from top to bottom, and the first convex ring is uniformly distributed with a plurality of pairs of U-shaped grooves in the radial direction, and the top of the tube wall of the basket centrifugal tube is provided with a second convex ring extending in the radial direction;

[0016] When the centrifugal tube is the grooved centrifugal tube, a pair of limiting protrusions are arranged at positions corresponding to the U-shaped grooves in the first convex ring on the inner wall of the horizontal rotor radial groove, and the U-shaped grooves of the grooved centrifugal tube are lapped on the corresponding limiting protrusions;

[0017] When the centrifugal tube is the basket centrifugal tube, a limiting sleeve is further arranged in the horizontal rotor, two positioning rods symmetrically arranged along the center axis of the radial groove are fixed at a position close to the outer side of the horizontal rotor radial groove, a pair of grooves are arranged at positions corresponding to the positioning rods on the limiting sleeve, the grooves are lapped on the corresponding positioning rods, the outer diameter of the second convex ring is greater than the inner diameter of the limiting sleeve, the basket centrifugal tube is placed in the limiting sleeve, and the bottom of the second convex ring is in contact with the upper surface of the limiting sleeve.

[0018] A method for removing free water from ion exchange resin based on the device for removing free water from ion exchange resin according to any one of the preceding claims, comprising the following steps:

[0019] S1, the ion exchange resin sample to be removed from the free water is transferred into the centrifugal tube with desalted water, and then hung on the horizontal rotor, and the cover of the low-speed centrifuge main body is closed;

[0020] S2, the low-speed centrifuge main body is started, the centrifugal tube is turned from the vertical position to the horizontal position under the action of the radial centrifugal force, the centrifuged water is thrown out of the through hole of the centrifugal tube and into the water collection tank, and the removal of the free water in the ion exchange resin is completed.

[0021] Further comprising S3:

[0022] S3, the low-speed centrifuge main body is closed, the cover of the low-speed centrifuge main body is opened, the centrifugal tube is taken out, and the separation of the ion exchange resin sample and the water collection tank is realized.

[0023] Compared with the prior art, the present application has the following beneficial technical effects:

[0024] This invention discloses a device for removing free water from ion exchange resin. Considering the risk of damage caused by the separated water directly entering the centrifuge cavity, a water collection tank is incorporated to facilitate the collection of the separated water. By connecting centrifuge tubes to a horizontal rotor, the conventional outer tubing of the centrifuge tubes is eliminated. The low-speed centrifuge drives the horizontal rotor to rotate via the water collection tank. The centrifuge tubes, under radial centrifugal force, change from a vertical to a horizontal position, causing water to be ejected from the tubes' through-holes and enter the water collection tank. Since the centrifuge tubes are in a vertical position when the low-speed centrifuge is not running, a gap exists between their bottoms and the bottom of the water collection tank, preventing water from re-entering the ion exchange resin layer and causing experimental failure.

[0025] Furthermore, the present invention improves the conventional centrifuge tube core by providing a bottom plate with a first through hole and a second through hole in the lower part of the tube wall. The through hole size is set according to the particle size of the ion exchange resin particles, which can effectively prevent the leakage of ion exchange resin particles while allowing free water to flow out quickly.

[0026] This invention discloses a method for removing free water from ion exchange resins. The ion exchange resin sample to be dehydrated is transferred into a centrifuge tube using demineralized water. The tube is then hung on a horizontal rotor. After the low-speed centrifuge is started, the centrifuge tube is rotated from a vertical to a horizontal position under radial centrifugal force. Water is ejected from the through-hole of the centrifuge tube and enters a water collection tank for easy collection. Experimental conditions can be controlled by setting the centrifuge speed and time, eliminating human error and ensuring controllable experimental results. This method achieves automatic and efficient removal of external free water from ion exchange resins. It is convenient to operate and overcomes the traditional method of placing the centrifuge tube inside the outer tube of the horizontal rotor. It offers advantages such as high efficiency, low cost, and stable and controllable conditions, providing a stable sample for the determination of the physicochemical properties of ion exchange resins, which is of great significance. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the apparatus for removing free water from ion exchange resin according to the present invention.

[0028] Figure 2a for Figure 1 A schematic diagram with partial cross-section showing the centrifuge body excluding the main body.

[0029] Figure 2b for Figure 1 A schematic diagram of the greywater collection tank.

[0030] Figure 3a This is a schematic diagram of the grooved centrifuge tube described in this invention.

[0031] Figure 3b for Figure 3a A partial sectional view.

[0032] Figure 4a This is a schematic diagram of the structure of the basket-type centrifuge tube and the limiting sleeve described in this invention.

[0033] Figure 4b for Figure 4a The disassembled structural diagram.

[0034] In the diagram: 1. Centrifuge tube; 2. Horizontal rotor; 3. Water collection tank; 4. Low-speed centrifuge body; 5. Grooved centrifuge tube; 6. Basket-type centrifuge tube; 7. Base plate; 8. Sleeve; 9. First through hole; 10. Second through hole; 11. First convex ring; 12. Limiting sleeve; 13. Second convex ring. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to specific embodiments. These descriptions are for explanation purposes only and are not intended to limit the scope of the invention.

[0036] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The description is for explanation and not limitation of the present invention.

[0037] This invention provides a device for removing free moisture from the exterior of an ion exchange resin, such as... Figure 1 As shown, it mainly includes centrifuge tubes 1, horizontal rotor 2, water collection tank 3, and low-speed centrifuge main unit 4:

[0038] A water collection tank 3 is movably mounted on the drive shaft of the motor in the main body 4 of the low-speed centrifuge. The horizontal rotor 2 is fixed on the drive shaft of the motor and is located in the water collection tank 3. Figure 3a As shown, centrifuge tube 1 is used to hold ion exchange resin. The centrifuge tube is made of polymethyl methacrylate or stainless steel, and its main shape is a cylindrical tube. Figure 3b As shown, the centrifuge tube 1 is open at both the bottom and top. A horizontally distributed base plate 7 is mounted 0.5 cm to 1.5 cm from the bottom. The base plate 7 has 6 to 9 evenly spaced, longitudinally arranged, elongated first through-holes 9, each 1 mm to 2 mm long and 0.10 mm to 0.20 mm wide. These through-holes are parallel to each other, allowing water to flow out while preventing leakage of ion exchange resin particles. Similarly, the lower part of the centrifuge tube 1 has 3 to 5 horizontally arranged, evenly spaced, elongated second through-holes 10, each 1 mm to 2 mm long and 0.1 mm to 0.2 mm wide. These through-holes are parallel to each other, allowing free water to flow out from the side of the centrifuge tube 1, reducing centrifugation time. Furthermore, the centrifuge tube 1 is easy to process and durable.

[0039] like Figure 2aAs shown, the upper part of the outer wall of the centrifuge tube 1 containing ion exchange resin can be directly hung on the horizontal rotor 2. When the main body 4 of the low-speed centrifuge is not started, the centrifuge tube 1 is distributed in the vertical direction and the bottom is separated from the bottom of the water collection tank 3. When the centrifuge tube 1 is in a horizontal state, the two ends of the centrifuge tube 1 are separated from the inner wall of the water collection tank 3 and the horizontal rotor 2, respectively. During use, it does not affect the rotation of the horizontal rotor 2 and can collect the water thrown out by the centrifuge tube 1, preventing water from entering the centrifuge and damaging the machine. After the main body 4 of the low-speed centrifuge is turned on, the water collection tank 3 remains stationary. The centrifuge tube 1 is subjected to radial centrifugal force and changes from a vertical position to a horizontal position. Water is thrown out from the bottom plate and side holes of the centrifuge tube and enters the water collection tank 3. After centrifugation, the centrifuge tube 1 is removed and the ion exchange resin is poured into the weighing box.

[0040] The upper part of the outer wall of centrifuge tube 1 can be Figure 3a The groove type shown Figure 4a , Figure 4b The two shapes shown are grooved centrifuge tubes 5 and basket-type centrifuge tubes 6. Figure 3a As shown, the top of the grooved centrifuge tube 5 is provided with a first convex ring 11 extending from top to bottom. The first convex ring 11 has several pairs of U-shaped grooves symmetrically and evenly distributed in the radial direction. The top of the tube wall of the basket-type centrifuge tube 6 is provided with a second convex ring 13 extending in the radial direction.

[0041] When a grooved centrifuge tube 5 is selected, a pair of limiting protrusions are provided on the inner wall of the radial groove of the horizontal rotor 2 at the position corresponding to the U-shaped groove in the first convex ring 11. The U-shaped groove of the grooved centrifuge tube 5 overlaps on the corresponding limiting protrusions. When a basket-type centrifuge tube 6 is selected, the horizontal rotor 2 also needs to be additionally designed with a limiting sleeve 12. Two positioning rods symmetrically arranged along the central axis of the radial groove are fixed near the outer side of the radial groove of the horizontal rotor 2. A pair of grooves are provided on the limiting sleeve 12 at the corresponding positions of these two positioning rods. Each groove overlaps on the corresponding positioning rod. The outer diameter of the second convex ring 13 is larger than the inner diameter of the limiting sleeve 12. The basket-type centrifuge tube 6 can be placed in the limiting sleeve 12 and installed by the bottom of the second convex ring 13 contacting the upper surface of the limiting sleeve 12. In this way, the grooved centrifuge tube 5 or the basket-type centrifuge tube 6 can be overlapped on these two different types of horizontal rotors 2. For convenience, Figure 2a The two different types mentioned above are drawn together, with grooved centrifuge tubes 5 or basket-type centrifuge tubes 6 placed respectively.

[0042] like Figure 2bAs shown, the water collection tank 3 of the present invention is a hollow annular shape. A horizontal rotor 2 is installed in the hollow part. A sleeve 8 is provided in the center of the water collection tank 3. The drive shaft of the motor is fixedly inserted through the sleeve 8 from bottom to top. The center of the horizontal rotor 2 is fixedly sleeved on the drive shaft of the motor from top to bottom. There is a gap between the upper end face of the sleeve 8 and the lower end face of the horizontal rotor 2. The upper end face of the horizontal rotor 2 is lower than the upper end face of the motor drive shaft. The upper end face of the motor drive shaft is lower than the upper end face of the water collection tank 3. The height of the side wall of the sleeve 8 does not affect the centrifuge tube 1 from turning to the horizontal direction under the action of centrifugal force during the centrifugation process.

[0043] The ion exchange resin free water removal device of this invention includes a water collection tank, which fully considers the risk of damage to the instrument caused by the separated water directly entering the centrifuge cavity, and facilitates the collection of the separated water. By connecting the centrifuge tubes to the horizontal rotor, the conventional centrifuge tube outer sleeve is eliminated. The low-speed centrifuge drives the horizontal rotor to rotate through the water collection tank. The centrifuge tubes, under radial centrifugal force, change from a vertical position to a horizontal position, and water is ejected from the through-holes of the centrifuge tubes into the water collection tank. When the low-speed centrifuge is not running, the centrifuge tubes are in a vertical state, with a gap between their bottoms and the bottom of the water collection tank to prevent water in the water collection tank from re-entering the ion exchange resin layer.

[0044] The present invention provides a method for removing free moisture from the exterior of an ion exchange resin, based on the aforementioned apparatus, comprising the following steps:

[0045] First, select the appropriate centrifuge tube 1 according to the type of horizontal rotor, transfer an appropriate amount of ion exchange resin sample into it with demineralized water, adjust the upper surface of the sample to be level, and ensure that the distance between the ion exchange resin layer and the upper edge of the centrifuge tube is not less than 1 cm. When processing multiple ion exchange resin samples at the same time, considering the balance of the centrifuge, it is necessary to control the mass of the ion exchange resin samples in the centrifuge tube to be similar.

[0046] The second step is to fix the sleeve 8 of the water collection tank 3 to the drive shaft of the motor in the main body 4 of the low-speed centrifuge, with the bottom contacting the bottom of the inner cavity of the main body 4 of the low-speed centrifuge. Then, hang several centrifuge tubes 1 containing ion exchange resin samples on the horizontal rotor 2. The center of the horizontal rotor 2 is fixedly sleeved on the drive shaft of the motor from top to bottom. Close the cover of the main body 4 of the low-speed centrifuge, set the speed and time, and start the main body 4 of the low-speed centrifuge.

[0047] Third step: After centrifugation, turn off the main body 4 of the low-speed centrifuge, open the cover, take out the centrifuge tube 1, and pour the ion exchange resin sample into the weighing box with a cover for later use.

[0048] The fourth step is to remove the water collection tank 3 from the low-speed centrifuge, pour out the water, and finally remove the free water from the ion exchange resin.

[0049] Example 1

[0050] This invention discloses a method for removing free water from ion exchange resins, wherein the apparatus used employs a grooved centrifuge tube 5, and specifically includes the following steps:

[0051] The first step is to transfer the ion exchange resin sample into two grooved centrifuge tubes 5 using demineralized water, with the distance between the ion exchange resin layer and the upper edge of the centrifuge tube being 1.5 cm.

[0052] The second step is to fix the sleeve 8 of the water collection tank 3 to the drive shaft of the motor in the main body 4 of the low-speed centrifuge, and then hang the two grooved centrifuge tubes 5 containing ion exchange resin samples on the limiting protrusions matching the radial groove of the horizontal rotor 2, and place them in the diagonal position. The center of the horizontal rotor 2 is fixedly sleeved on the drive shaft of the motor from top to bottom. Close the cover of the main body 4 of the low-speed centrifuge, set the speed to 2500 r / min, the time to 5 min, and start the main body 4 of the centrifuge.

[0053] Third step: After centrifugation, turn off the main body 4 of the low-speed centrifuge, open the cover, take out the grooved centrifuge tube 5, and pour the ion exchange resin sample into the weighing box with a cover for later use.

[0054] The fourth step is to remove the water collection tank 3 from the low-speed centrifuge, pour out the water, and finally remove the free water from the ion exchange resin.

[0055] Example 2

[0056] This invention discloses a method for removing free water from ion exchange resins, wherein the apparatus used employs a basket-type centrifuge tube 6, and specifically includes the following steps:

[0057] The first step is to transfer the ion exchange resin sample into four basket centrifuge tubes 6 using demineralized water, with the distance between the ion exchange resin layer and the top edge of the centrifuge tube being 2 cm.

[0058] The second step is to fix the sleeve 8 of the water collection tank 3 to the drive shaft of the motor in the main body of the low-speed centrifuge 4, and then vertically pass the four basket-type centrifuge tubes 6 containing ion exchange resin samples through the limiting sleeve 12 of the horizontal rotor 2. The basket-type centrifuge tubes 6 are hung by the second convex ring 13. The center of the horizontal rotor 2 is fixedly sleeved on the drive shaft of the motor from top to bottom. Close the cover of the main body of the low-speed centrifuge 4, set the speed to 2000 r / min and the time to 8 min, and start the main body of the centrifuge 4.

[0059] Third step: After centrifugation, turn off the main body 4 of the low-speed centrifuge, open the cover, take out the basket-type centrifuge tubes 6, and pour the ion exchange resin sample into the weighing box with a cover for later use.

[0060] The fourth step is to remove the water collection tank 3 from the low-speed centrifuge, pour out the water, and finally remove the free water from the ion exchange resin.

[0061] This invention discloses a method for removing free water from ion exchange resins. The ion exchange resin sample is transferred into a centrifuge tube using demineralized water and then hung on a horizontal rotor. After the low-speed centrifuge is started, the centrifuge tube is rotated from a vertical position to a horizontal position under radial centrifugal force. Water is ejected from the through-hole of the centrifuge tube and enters a water collection tank, facilitating the collection of the separated water. Experimental conditions are controlled by setting the centrifuge speed and time, eliminating human error and ensuring controllable experimental results. This method achieves automatic and efficient removal of external free water from ion exchange resins. It is convenient to operate and overcomes the traditional method of placing the centrifuge tube inside the outer tube of the horizontal rotor. It offers advantages such as high efficiency, low cost, and stable and controllable conditions, providing a stable sample for the determination of the physicochemical properties of ion exchange resins.

Claims

1. An apparatus for removing free water from ion exchange resin, characterized by, The centrifugal tube (1), the horizontal rotor (2) and the low-speed centrifuge main body (4) are included. The water collection groove (3) is sleeved on the driving shaft of the motor in the low-speed centrifuge main body (4), the horizontal rotor (2) is fixed on the driving shaft of the motor, the horizontal rotor (2) is located in the water collection groove (3), the centrifugal tube (1) is provided with a through hole for draining water, the centrifugal tube (1) is used for loading ion exchange resin to be removed from free water, the centrifugal tube (1) is a cylindrical tube, the bottom and the top of the centrifugal tube (1) are provided with openings, the centrifugal tube (1) is provided with a horizontally distributed bottom plate (7) at a distance of 0.5 cm to 1.5 cm from the bottom, the bottom plate (7) is provided with a first through hole (9), the centrifugal tube (1) is provided with a second through hole (10) at the lower part of the tube wall, and the centrifugal tube (1) is lapped on the horizontal rotor (2); The water collection groove (3) is a hollow circular ring structure, the center of the water collection groove (3) is provided with a sleeve (8), the driving shaft of the motor is fixed and penetrates the sleeve (8) from bottom to top, the center of the horizontal rotor (2) is fixed and sleeved on the driving shaft of the motor from top to bottom, the upper end surface of the sleeve (8) and the lower end surface of the horizontal rotor (2) are spaced apart, the upper end surface of the horizontal rotor (2) is lower than the upper end surface of the driving shaft of the motor, and the upper end surface of the driving shaft of the motor is lower than the upper end surface of the water collection groove (3); When the low-speed centrifuge main body (4) is not started, the centrifugal tube (1) is distributed in the vertical direction and the bottom is spaced apart from the bottom of the water collection groove (3), when the low-speed centrifuge main body (4) is started, the centrifugal tube (1) is in a horizontal state, and the two ends of the centrifugal tube (1) are respectively spaced apart from the inner wall of the water collection groove (3) and the horizontal rotor (2).

2. The apparatus for removing free moisture from a deionization exchange resin according to claim 1, wherein The first through hole (9) and the second through hole (10) are both long strip-shaped through holes, the length is 1 mm to 2 mm, and the width is 0.1 mm to 0.2 mm.

3. The apparatus for removing free moisture from a deionization exchange resin of claim 1, wherein, The first through hole (9) is uniformly provided with 6 to 9 vertical rows on the bottom plate (7), the second through hole (10) is provided with 3 to 5 horizontal rows on the tube wall of the centrifugal tube (1), all the first through holes (9) are parallel to each other, and all the second through holes (10) are parallel to each other.

4. The apparatus for removing free moisture from a deionization exchange resin of claim 1, wherein, The centrifugal tube (1) is a groove type centrifugal tube (5) or a hanging basket type centrifugal tube (6), the top of the groove type centrifugal tube (5) is provided with a first convex ring (11) extending from top to bottom, the first convex ring (11) is uniformly distributed with a plurality of pairs of U-shaped grooves in the radial direction, and the tube wall of the hanging basket type centrifugal tube (6) is provided with a second convex ring (13) extending in the radial direction at the top; When the centrifugal tube (1) is the groove type centrifugal tube (5), a pair of limiting protrusions are arranged at positions corresponding to the U-shaped grooves in the first convex ring (11) on the inner wall of the radial groove of the horizontal rotor (2), and the U-shaped grooves of the groove type centrifugal tube (5) are lapped on the corresponding limiting protrusions. When the centrifugal tube (1) is a basket centrifugal tube (6), a limiting sleeve (12) is further arranged in the horizontal rotor (2), two positioning rods are fixed at positions close to the outer side of the radial slot of the horizontal rotor (2) and symmetrical to the center axis of the radial slot, the limiting sleeve (12) is provided with a pair of grooves at positions corresponding to the positioning rods, the grooves are lapped on the corresponding positioning rods, the outer diameter of the second convex ring (13) is greater than the inner diameter of the limiting sleeve (12), the basket centrifugal tube (6) is placed in the limiting sleeve (12) in a penetrating manner, and the bottom of the second convex ring (13) is in contact with the upper surface of the limiting sleeve (12).

5. A method for removing free water from an ion exchange resin, characterized by, The device for removing free water from ion exchange resin according to any one of claims 1-4, comprising the following steps: S1, the ion exchange resin sample to be removed from the free water is transferred into the centrifugal tube (1) with desalted water, and then hung on the horizontal rotor (2), and the cover of the low-speed centrifuge body (4) is closed; S2, the low-speed centrifuge body (4) is started, the centrifugal tube (1) is turned from the vertical position to the horizontal position under the action of the radial centrifugal force, the centrifuged water is thrown out of the through hole of the centrifugal tube (1) and enters the water collecting groove (3), and the removal of the free water in the ion exchange resin is completed.

6. The method of removing free moisture from a deionization exchange resin according to claim 5, wherein, Further comprising S3: S3, the low-speed centrifuge body (4) is closed, the cover of the low-speed centrifuge body (4) is opened, the centrifugal tube (1) is taken out, and the separation of the ion exchange resin sample and the water collecting groove (3) is realized.

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