Method for determining adulteration of new resin using crushing strength

Abstract

The application discloses a method for judging adulteration of new resin by using crushing strength, which comprises the following steps: 1) detecting different types of resins to obtain standard crushing strength data of various resins; 2) setting comparison information of the crushing strength; 3) detecting the resin to be detected to obtain crushing strength data of the resin to be detected; 4) comparing the standard crushing strength data with the crushing strength data of the resin to be detected, and calculating the deviation between the standard crushing strength data and the crushing strength data of the resin to be detected; when the calculated deviation is within a preset range, it is indicated that the resin to be detected is not adulterated, otherwise, it is indicated that the resin to be detected is adulterated, and the method can quickly judge whether the new resin is adulterated.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of detection, and relates to a method for judging adulteration of new resin by using crushing strength. BACKGROUND

[0002] Ion exchange resin is a high molecular compound with functional groups, a network structure and insolubility, and is usually spherical granular matter, and is widely applied in water treatment fields of power plants. The scrapped resin can reach a similar appearance to new resin after simple treatment, so there are professional companies recycling the scrapped resin on the market. The recycled resin flows into the market again after reprocessing. Part of the recycled resin is mixed in new resin to be sold as new resin or is directly sold after reprocessing. The scrapped resin is reprocessed, and the exchange capacity is short-term improved during use, but the crushing strength is greatly reduced compared with new resin, and broken resin is easily generated, which not only affects the water quality after operation, but also causes certain safety hazards to the operation of the unit.

[0003] At present, the performance parameters investigated in the acceptance process of new resin include volume exchange capacity, particle size range, penetration grinding ball rate, wet apparent density and wet true density, and the above parameters can judge the overall level of the resin. However, when a small amount of scrapped resin is mixed in new resin, the difference between each resin cannot be detected, so it is impossible to judge whether the resin is mixed with scrapped resin. When the resin is mixed with scrapped resin, the small part of the scrapped resin will play a decisive role in the use process of the overall resin, so it is very important to detect whether the resin is mixed with scrapped resin for the acceptance of new resin. SUMMARY

[0004] The application aims to overcome the defects of the prior art, and provides a method for judging adulteration of new resin by using crushing strength, which can quickly judge whether new resin is adulterated.

[0005] To achieve the above object, the method for judging adulteration of new resin by using crushing strength comprises the following steps:

[0006] 1) Detecting different types of resin to obtain standard crushing strength data of various types of resin;

[0007] 2) Setting comparison information of the crushing strength;

[0008] 3) Detecting the resin to be detected to obtain crushing strength data of the resin to be detected;

[0009] 4) Comparing the standard crushing strength data with the crushing strength data of the resin to be detected, and calculating the deviation between the standard crushing strength data and the crushing strength data of the resin to be detected;

[0010] When the calculated deviation is within the preset range, it indicates that the to-be-tested resin is not adulterated, otherwise, it indicates that the to-be-tested resin is adulterated.

[0011] In step 1), a crushing strength tester is used to detect different types of resins.

[0012] In step 3), a crushing strength tester is used to detect the to-be-tested resin.

[0013] The specific operation of step 1) is as follows:

[0014] 11) Select each brand and model of refined resin for power plants;

[0015] 12) Take M mL of each brand and model of resin obtained in step 11), and then screen them respectively;

[0016] 13) Perform crushing strength test on the resin to obtain the standard crushing strength data of the resin;

[0017] 14) Calculate the average value of the crushing strength of K resin particles, take the calculated result as the standard crushing strength value of the resin, and count the proportion of the crushing strength in the range of 0-4 N / particle.

[0018] Step 1) further comprises: binding the standard crushing strength value of each type of resin with its brand and model, and constructing a standard crushing strength database of the resin based on this.

[0019] The specific process of step 13) is as follows:

[0020] Start the crushing strength tester, preheat and calibrate the crushing strength tester, then place the resin on the test platform of the crushing strength tester, ensure that the resin particles are directly below the pressure head, start the crushing strength tester, and the pressure head moves down at a constant speed to uniformly press the resin, the pressure head automatically lifts at the moment of resin crushing, and the screen displays the crushing pressure value of the resin, which is taken as the crushing strength of the resin particle.

[0021] The comparison information of the crushing strength in step 2) includes the average value of the crushing strength and the proportion of the crushing strength in the range of 0-4 N / particle;

[0022] When the average value P of the crushing strength of the to-be-tested resin is within the range of the standard crushing strength value P±10%, and the proportion of the crushing strength in the range of 0-4 N / particle is ≤2%, it indicates that the to-be-tested resin is not adulterated. i

[0023] The present application has the following beneficial effects:

[0024] ​The method for judging new resin adulteration by using crushing strength provided by the present application can efficiently and quickly judge whether the resin is adulterated by testing the crushing strength of the resin to reflect the condition of the single resin, and the testing process is fast and simple, and the method provides a scientific judging method for judging whether the resin is adulterated with the scrap resin. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The test flowchart of the present application. DETAILED DESCRIPTION

[0026] In order to make the personnel in the technical field better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments, and are not intended to limit the scope of the present application. In addition, in the following description, the description of the known structures and technologies is omitted to avoid unnecessary confusion of the concepts disclosed in the present application. Based on the embodiments in the present application, all other embodiments obtained by the ordinary skilled in the art without making creative efforts should belong to the scope of protection of the present application.

[0027] Reference Figure 1 The method for judging new resin adulteration by using crushing strength provided by the present application comprises the following steps:

[0028] 1) A crushing strength tester is used to detect different types of resins to obtain standard crushing strength data of various resins;

[0029] 2) Set the comparison information of the crushing strength;

[0030] 3) A crushing strength tester is used to detect the resin to be detected to obtain the crushing strength data of the resin to be detected;

[0031] 4) Compare the standard crushing strength data and the crushing strength data of the resin to be detected, and calculate the deviation between the standard crushing strength data and the crushing strength data of the resin to be detected;

[0032] When the calculated deviation is within the preset range, it indicates that the resin to be detected is not adulterated, otherwise, it indicates that the resin to be detected is adulterated.

[0033] The specific operation of step 1) is:

[0034] 11) Select each brand and type of resin for fine treatment used in power plants;

[0035] 12) Take 500mL of each brand and model of resin obtained in step 11), and then screen them separately. The specific screening process is as follows: place the resin on a tray, use a dividing plate to mix the resin evenly, spread the resin into a circle of equal thickness, use the dividing plate to draw two diagonal lines on the resin to divide it into four parts, mix the two diagonal parts of resin evenly and set aside; use a dividing sieve to screen the prepared resin a second time. The screening process is carried out by wet screening in water. Remove the resin stuck in the mesh and place it in a beaker containing water for later use.

[0036] 13) Perform crushing strength tests on the resin to obtain standard crushing strength data. The specific process is as follows: start the crushing strength tester, preheat and calibrate the crushing strength tester, then place the resin in the test platform of the crushing strength tester, ensuring that the resin particles are directly below the pressure head, start the crushing strength tester, and the pressure head moves down at a constant speed to apply pressure to the resin at a constant speed. At the moment the resin breaks, the pressure head automatically rises, and the screen displays the pressure value of the resin breaking. The pressure value of the resin breaking is taken as the crushing strength of the resin particle. 50 particles of various resins are tested.

[0037] 14) Calculate the average crushing strength of 50 resin particles, take the calculated result as the standard crushing strength value of this type of resin, and count the percentage of particles with crushing strength between 0 and 4 N / particle.

[0038] 15) Bind the standard crushing strength values ​​of various resins to their brands and models, and use this to build a database of standard crushing strengths of resins.

[0039] The comparative information on crushing strength in step 2) includes the average crushing strength and the percentage of particles with crushing strength between 0 and 4 N / particle;

[0040] Determine the upper and lower deviations of the average crushing strength, and statistically analyze the percentage of particles with crushing strength between 0 and 4 N / particle.

[0041] In step 4), when the average crushing strength P of the resin to be tested... i If the crushing strength is within the range of standard crushing strength value P ± 10%, and the proportion of crushing strength between 0 and 4 N / particle is ≤ 2%, it indicates that the resin is not adulterated.

[0042] The purpose of this invention is to overcome the limitations of existing new resin acceptance processes, where indicators such as exchange capacity cannot determine whether new resin is adulterated with recycled resin. This is because existing resin acceptance standards test batches of resin, making it impossible to assess the condition of each individual resin cell. This invention, by testing the crushing strength of the resin, reflects the condition of an individual resin cell, thereby determining whether new resin is adulterated with recycled resin. Experimental verification shows that this invention's testing process is rapid and simple, providing a scientific method for determining whether resin is adulterated with waste resin.

Claims

1. A method for determining adulteration of new resin using crushing strength, characterized in that, Includes the following steps: 1) Test different types of resins to obtain standard crushing strength data for each type of resin; 2) Set the comparison information for crushing strength; 3) Test the resin to be tested and obtain the crushing strength data of the resin to be tested; 4) Compare the standard crushing strength data with the crushing strength data of the resin to be tested, and calculate the deviation between the standard crushing strength data and the crushing strength data of the resin to be tested; If the calculated deviation is within the preset range, it indicates that the resin to be tested is not adulterated; otherwise, it indicates that the resin to be tested is adulterated. The specific operation of step 1) is as follows: 11) Select resins of various brands and models for power plant finishing processes; 12) Take M mL of resin of each brand and model obtained in step 11), and then screen them separately; 13) Perform a crushing strength test on the resin to obtain the standard crushing strength data of the resin; 14) Calculate the average crushing strength of K resin particles, use the calculated result as the standard crushing strength value of this type of resin, and count the percentage of particles with crushing strength between 0 and 4 N / particle. Step 1) also includes: binding the standard crushing strength values ​​of various resins with their brands and models, and using this to build a standard crushing strength database for resins; The specific process of step 13) is as follows: Start the crushing strength tester, preheat and calibrate it, then place the resin in the test platform of the crushing strength tester, ensuring that the resin particles are directly below the pressure head. Start the crushing strength tester, and the pressure head moves down at a constant speed to apply pressure to the resin. At the moment the resin breaks, the pressure head automatically rises, and the screen displays the pressure value of the resin breaking. The pressure value of the resin breaking is taken as the crushing strength of the resin particles.

2. The method for determining adulteration of new resin using crushing strength according to claim 1, characterized in that, In step 1), a crushing strength tester is used to test different types of resin.

3. The method for determining adulteration of new resin using crushing strength according to claim 1, characterized in that, In step 3), the crushing strength tester is used to test the resin to be tested.

4. The method for determining adulteration of new resin using crushing strength according to claim 1, characterized in that, The comparative information on crushing strength in step 2) includes the average value of crushing strength and the percentage of crushing strengths between 0 and 4 N / particle.

5. The method for determining adulteration of new resin using crushing strength according to claim 4, characterized in that, When the average crushing strength P of the resin to be tested i If the value is within the range of the standard crushing strength value P ± 10%, it indicates that the resin is not adulterated.

6. The method for determining adulteration of new resin using crushing strength according to claim 4, characterized in that, The proportion of particles with a crushing strength of 0-4 N / particle is ≤2%.

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