CN112304822A - System and method for testing particle size, effective particle size and uniformity coefficient of ion exchange resin - Google Patents
System and method for testing particle size, effective particle size and uniformity coefficient of ion exchange resinDownload PDFInfo
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- CN112304822A CN112304822ACN202011157021.6ACN202011157021ACN112304822ACN 112304822 ACN112304822 ACN 112304822ACN 202011157021 ACN202011157021 ACN 202011157021ACN 112304822 ACN112304822 ACN 112304822A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N15/0205—Investigating particle size or size distribution by optical means
- G01N15/0211—Investigating a scatter or diffraction pattern
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N15/0205—Investigating particle size or size distribution by optical means
- G01N15/0211—Investigating a scatter or diffraction pattern
- G01N2015/0222—Investigating a scatter or diffraction pattern from dynamic light scattering, e.g. photon correlation spectroscopy
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Abstract
Description
Technical Field
The invention relates to a method for testing granularity, effective grain size and uniformity coefficient, in particular to a system and a method for testing the granularity, the effective grain size and the uniformity coefficient of ion exchange resin.
Background
The ion exchange resin has excellent exchangeability, adsorptivity and selectivity, and is widely applied to filtering, desalting and deep water purification in the industries of thermal power condensate water treatment, nuclear power reactor water treatment, chemical production waste liquid treatment and the like. The particle size, the effective particle size and the uniformity coefficient are important technical indexes for judging the particle size and the particle size distribution condition of the ion exchange resin, and relate to links such as equipment selection, process design and the like of a related industrial system.
Therefore, the new ion exchange resin entering the factory must be checked and detected, and the old ion exchange resin in service must be monitored and detected, so as to master the conditions of resin granularity, effective particle size and uniformity coefficient, find problems in time and eliminate hidden troubles.
The existing testing method is GB/T5758-2001 'determination of particle size, particle size and uniformity coefficient of ion exchange resin', and the specific method is as follows: weighing ion exchange resin samples for acid-base pretreatment. The test sieve is erected in a screening funnel containing demineralized water, a certain volume of pretreated sample particles are measured by using a measuring cylinder, and the pretreated sample particles are transferred to the test sieve. Through continuous up-down and left-right sieving, the sample particles vibrate in the desalted water, after the sieving, the net needs to be washed and cleaned, the sample particles are recovered to the measuring cylinder, and the volume number of the sample particles on the sieve is read and recorded. And replacing the test sieves with different specifications step by step according to the sequence of the pore diameters from large to small, and repeating the test according to the process. The volume ratio of samples screened under different test sieves is obtained through calculation, and the particle size, the effective particle size and the uniformity coefficient are analyzed by utilizing the volume fraction of the resin on the test sieve and a corresponding aperture drawing curve.
Because the process mainly depends on manual screening, the operation steps are complicated, the problems that the meshes of the screen are blocked by resin particles frequently, or the resin particles jump out of the upper edges of the screens frequently occur, and the like, the data processing is complex, the time and the labor are consumed, the influence of factors such as the processing precision and the abrasion degree of the test screen is easy to occur, the repeatability and the reproducibility of a test result are poor, and the test accuracy is poor.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned shortcomings of the prior art, and providing a system and a method for testing particle size, effective particle size and uniformity coefficient of ion exchange resin, which can more accurately measure particle size, effective particle size and uniformity coefficient of ion exchange resin.
In order to achieve the purpose, the system for testing the particle size, the effective particle size and the uniformity coefficient of the ion exchange resin comprises a sample cell, a dispersing agent storage tank, a circulating sample introduction system, a detector, an optical system, a data processor and a touch display screen;
the sample tank is internally provided with a stirrer, an outlet of the dispersing agent storage tank is communicated with an inlet of the sample tank, an outlet of the sample tank is communicated with an inlet of the detector through the circulating sample introduction system, an incident light window is arranged on the side wall of the detector, a laser beam output by the optical system irradiates into a mixture of the dispersing agent and the ion exchange resin particles in the detector through the incident light window, then the laser beam is received through the detector after being scattered by the ion exchange resin particles, an output end of the detector is connected with an input end of the data processor, and the touch display screen is connected with the data processor, the optical system and the stirrer.
The dispersant is water.
The ultrasonic cleaning system is connected with the detector and the circulating sample feeding system.
A method for testing the particle size, effective particle size and uniformity coefficient of ion exchange resin comprises the following steps:
1) introducing a dispersing agent into the sample pool, adding the ion exchange resin particles to be tested into the dispersing agent, and stirring to obtain a mixture;
2) introducing the mixture in the sample cell into a detector through a circulating sample introduction system;
3) laser beams generated by the optical system are irradiated into the mixture through an incident light window, and are scattered by the ion exchange resin particles and then received through the detector, the data processor analyzes the light intensity distribution of the scattered light based on the Mie scattering theory and the Maxwell electromagnetic equation according to the strong light distribution of the scattered light received by the detector to obtain the particle size distribution condition of the ion exchange resin particles, and then the particle size, the effective particle size and the uniformity coefficient of the ion exchange resin are obtained according to the particle size distribution condition of the ion exchange resin particles.
The particle type of the ion exchange resin is non-spherical polymeric high molecular material, the refractive index is 1.50-1.60, the absorptivity is 0.1-1.0%, and the density is 1.00-1.30%; the refractive index of the dispersant was 1.33.
The stirring speed of the stirrer is 2000-3000 r/min.
The duration time of red light background measurement is 8s, and the duration time of sample measurement is 6 s; the duration of blue light background measurement is 8s, and the duration of sample measurement is 6 s; evaluating the stability time of the background of the light source to be 120 s; the number of measurements was 5; the lower limit of the measured opacity is 5%, and the upper limit of the measured opacity is 15%; the stabilization time for automatically starting the measurement between the upper and lower limits of the measurement shade was 30 s.
The data processor sets the upper limit of the particle size of the ion exchange resin particles to be 5000um and the lower limit of the particle size to be 0.005 um.
The invention has the following beneficial effects:
the system and the method for testing the particle size, the effective particle size and the uniformity coefficient of the ion exchange resin have the advantages that during specific operation, laser beams are irradiated on sample particles uniformly dispersed in a dispersing agent and then scattered, the light intensity distribution of the scattered light is analyzed based on the Mie scattering theory and the Maxwell electromagnetic equation, the particle size distribution condition of the ion exchange resin particles is obtained, then the particle size, the effective particle size and the uniformity coefficient of the ion exchange resin are obtained according to the particle size distribution condition of the ion exchange resin particles, and the system and the method have the characteristics of simplicity and convenience in operation, time saving, high efficiency, high accuracy and good reproducibility.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a sample cell, 2 is a circulating sample introduction system, 3 is an optical system, 4 is a detector, 5 is an ultrasonic cleaning system, and 6 is a data processor.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the system for testing particle size, effective particle size and uniformity coefficient of ion exchange resin according to the present invention includes asample cell 1, a dispersant storage tank, a circulatingsample injection system 2, a detector 4, anoptical system 3, a data processor 6 and a touch display screen; thesample cell 1 is internally provided with a stirrer, an outlet of the dispersing agent storage tank is communicated with an inlet of thesample cell 1, an outlet of thesample cell 1 is communicated with an inlet of the detector 4 through the circulatingsample introduction system 2, the side wall of the detector 4 is provided with an incident light window, a laser beam output by theoptical system 3 irradiates into a mixture of the dispersing agent and ion exchange resin particles in the detector 4 through the incident light window, the mixture is scattered by the ion exchange resin particles and then is received by the detector 4, an output end of the detector 4 is connected with an input end of the data processor 6, and the touch display screen is connected with the data processor 6, theoptical system 3 and the stirrer.
The dispersing agent is water, the invention also comprises anultrasonic cleaning system 5, wherein theultrasonic cleaning system 5 is connected with the detector 4 and the circulatingsample injection system 2.
The method for testing the particle size, the effective particle size and the uniformity coefficient of the ion exchange resin comprises the following steps of:
1) introducing a dispersing agent into thesample pool 1, adding the ion exchange resin particles to be tested into the dispersing agent, and stirring to obtain a mixture;
2) introducing the mixture in thesample cell 1 into a detector 4 through a circulatingsample introduction system 2;
3) the laser beam generated by theoptical system 3 is irradiated into the mixture through an incident light window, and is received through the detector 4 after being scattered by the ion exchange resin particles, the data processor 6 analyzes the light intensity distribution of the scattered light based on the Mie scattering theory and the Maxwell electromagnetic equation according to the strong light distribution of the scattered light received by the detector 4, and combines with an inversion operation model to obtain the particle size distribution condition of the ion exchange resin particles, and then obtains the particle size, the effective particle size and the uniformity coefficient of the ion exchange resin according to the particle size distribution condition of the ion exchange resin particles.
The particle type of the ion exchange resin is non-spherical polymeric high molecular material, the refractive index is 1.50-1.60, the absorptivity is 0.1-1.0%, and the density is 1.00-1.30%; the refractive index of the dispersant was 1.33.
The stirring speed of the stirrer is 2000-3000 r/min, the duration time of red light background measurement is 8s, and the duration time of sample measurement is 6 s; the duration of blue light background measurement is 8s, and the duration of sample measurement is 6 s; evaluating the stability time of the background of the light source to be 120 s; the number of measurements was 5; the lower limit of the measured opacity is 5%, and the upper limit of the measured opacity is 15%; the stable time for automatically starting measurement between the upper limit and the lower limit of the measurement light shading degree is 30 s; the data processor 6 sets the upper limit of the particle size of the ion exchange resin particles to 5000um and the lower limit of the particle size to 0.005 um.
And after the test is finished, pouring the mixture in thesample cell 1, adding pure water, introducing the pure water into the detector 4 and the circulatingsample injection system 2, then starting theultrasonic cleaning system 5, and ultrasonically cleaning the detector 4 and the circulatingsample injection system 2 through theultrasonic cleaning system 5.
Claims (8)
1. A test system for particle size, effective particle size and uniformity coefficient of ion exchange resin is characterized by comprising a sample cell (1), a dispersing agent storage tank, a circulating sample introduction system (2), a detector (4), an optical system (3), a data processor (6) and a touch display screen;
the device comprises a sample cell (1), a stirrer is arranged in the sample cell (1), an outlet of a dispersing agent storage tank is communicated with an inlet of the sample cell (1), an outlet of the sample cell (1) is communicated with an inlet of a detector (4) through a circulating sample introduction system (2), an incident light window is arranged on the side wall of the detector (4), a laser beam output by an optical system (3) irradiates into a mixture of dispersing agent and ion exchange resin particles in the detector (4) through the incident light window, and is received by the detector (4) after being scattered by the ion exchange resin particles, an output end of the detector (4) is connected with an input end of a data processor (6), and a touch display screen is connected with the data processor (6), the optical system (3) and the stirrer.
2. The system for testing particle size, effective particle size and uniformity coefficient of ion exchange resins of claim 1, wherein the dispersing agent is water.
3. The system for testing the particle size, the effective particle diameter and the uniformity coefficient of the ion exchange resin according to claim 1, further comprising an ultrasonic cleaning system (5), wherein the ultrasonic cleaning system (5) is connected with the detector (4) and the circulating sample injection system (2).
4. A method for testing particle size, effective particle size and uniformity coefficient of ion exchange resin, which is based on the system for testing particle size, effective particle size and uniformity coefficient of ion exchange resin of claim 1, comprising the following steps:
1) introducing a dispersing agent into the sample pool (1), adding the ion exchange resin particles to be tested into the dispersing agent, and stirring to obtain a mixture;
2) introducing the mixture in the sample cell (1) into a detector (4) through a circulating sample introduction system (2);
3) laser beams generated by the optical system (3) are irradiated into the mixture through an incident light window, and are scattered by the ion exchange resin particles and then received through the detector (4), the data processor (6) analyzes the light intensity distribution of the scattered light based on the Michelle scattering theory and the Maxwell electromagnetic equation according to the strong light distribution of the scattered light received by the detector (4) to obtain the particle size distribution condition of the ion exchange resin particles, and then the particle size, the effective particle size and the uniformity coefficient of the ion exchange resin are obtained according to the particle size distribution condition of the ion exchange resin particles.
5. The method for testing the particle size, effective particle diameter and uniformity coefficient of the ion exchange resin according to claim 4, wherein the particle type of the ion exchange resin is a non-spherical polymeric polymer material, the refractive index is 1.50-1.60, the absorption rate is 0.1% -1.0%, and the density is 1.00-1.30%; the refractive index of the dispersant was 1.33.
6. The method for testing particle size, effective particle diameter and uniformity coefficient of ion exchange resin according to claim 4, wherein the stirring speed of the stirrer is 2000-3000 r/min.
7. The method for testing the particle size, effective particle diameter and uniformity coefficient of an ion exchange resin according to claim 4, wherein the red background measurement duration is 8s, and the sample measurement duration is 6 s; the duration of blue light background measurement is 8s, and the duration of sample measurement is 6 s; evaluating the stability time of the background of the light source to be 120 s; the number of measurements was 5; the lower limit of the measured opacity is 5%, and the upper limit of the measured opacity is 15%; the stabilization time for automatically starting the measurement between the upper and lower limits of the measurement shade was 30 s.
8. The method for testing particle size, effective particle diameter and uniformity coefficient of ion exchange resin according to claim 4, wherein the data processor (6) sets the upper limit of the particle diameter of the ion exchange resin particles to 5000um and the lower limit of the particle diameter to 0.005 um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011157021.6ACN112304822A (en) | 2020-10-26 | 2020-10-26 | System and method for testing particle size, effective particle size and uniformity coefficient of ion exchange resin |
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| CN202011157021.6ACN112304822A (en) | 2020-10-26 | 2020-10-26 | System and method for testing particle size, effective particle size and uniformity coefficient of ion exchange resin |
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| CN112304822Atrue CN112304822A (en) | 2021-02-02 |
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| CN202011157021.6APendingCN112304822A (en) | 2020-10-26 | 2020-10-26 | System and method for testing particle size, effective particle size and uniformity coefficient of ion exchange resin |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114813486A (en)* | 2022-05-05 | 2022-07-29 | 上海电气国轩新能源科技(南通)有限公司 | A new method for measuring PVDF particle size of lithium battery materials |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5055694A (en)* | 1984-10-31 | 1991-10-08 | The Babcock & Wilcox Company | Method and apparatus for monitoring and measuring the concentration of ion exchange resin particles in water |
| CN110940622A (en)* | 2019-12-20 | 2020-03-31 | 中盐吉兰泰氯碱化工有限公司 | Paste resin particle size distribution determination method |
- 2020
- 2020-10-26CNCN202011157021.6Apatent/CN112304822A/enactivePending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5055694A (en)* | 1984-10-31 | 1991-10-08 | The Babcock & Wilcox Company | Method and apparatus for monitoring and measuring the concentration of ion exchange resin particles in water |
| CN110940622A (en)* | 2019-12-20 | 2020-03-31 | 中盐吉兰泰氯碱化工有限公司 | Paste resin particle size distribution determination method |
Non-Patent Citations (1)
| Title |
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| 明菊兰;孙晓卿;章月芳;: "激光衍射法在离子交换树脂粒度分析中的应用", 热力发电, no. 02, 25 February 2013 (2013-02-25), pages 72 - 73* |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114813486A (en)* | 2022-05-05 | 2022-07-29 | 上海电气国轩新能源科技(南通)有限公司 | A new method for measuring PVDF particle size of lithium battery materials |
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