A device and method for detecting water-insoluble matter in polyacrylamide

Abstract

The present invention provides a device and a detection method for detecting water-insoluble matter of polyacrylamide. The detection device comprises a reaction chamber, an electrolysis device, a temperature sensor and a current detector. When the detection device is used to detect the solubility of polyacrylamide, the solubility of polyacrylamide is detected in time by timely detecting the current and temperature changes generated when the polyacrylamide is dissolved. After the solubility of polyacrylamide is detected by the detection device, the content of water-insoluble matter of polyacrylamide can be calculated. In addition, the detection device does not need to rely on complex detection conditions during the detection process, the detection process is simple, the detection cost is low, and it is easy to promote.

Description

Technical Field

[0001] The present invention relates to the technical field of polyacrylamide detection, and in particular to a device and a method for detecting water-insoluble matter in polyacrylamide. Background Art

[0002] Polyacrylamide has good flocculation, thickening, drag reduction and other properties, and is widely used in water treatment, tailings treatment and other industries. Among the quality indicators of polyacrylamide, the water-insoluble content is an important indicator. Too high a water-insoluble content will affect the use effect of polyacrylamide and restrict the use of polyacrylamide. Therefore, it is of great significance to accurately detect the water-insoluble content of polyacrylamide. Summary of the invention

[0003] Based on the above problems, the present invention provides a device and a detection method for detecting water-insoluble matter in polyacrylamide. The device for detecting water-insoluble matter in polyacrylamide can detect the content of water-insoluble matter in polyacrylamide in a timely and accurate manner, and the detection device does not need to rely on complex detection conditions during the detection process, the detection process is simple, the detection cost is low, and it is easy to promote.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A device for detecting water-insoluble matter in polyacrylamide comprises a reaction chamber, an electrolysis device, a temperature sensor and a current detector; the reaction chamber is used to contain a polyacrylamide aqueous solution; the electrolysis device comprises a power supply, a cathode plate and an anode plate; the power supply is connected to the cathode plate and the anode plate to supply power to the cathode plate and the anode plate; one end of the cathode plate away from the power supply extends into the reaction chamber, and one end of the anode plate away from the power supply extends into the reaction chamber, and the cathode plate and the anode plate can contact the polyacrylamide aqueous solution in the reaction chamber to electrolyze the polyacrylamide aqueous solution; the detection end of the temperature sensor extends into the reaction chamber and can contact the polyacrylamide aqueous solution in the reaction chamber to detect the temperature of the polyacrylamide aqueous solution; the detection end of the current detector extends into the reaction chamber and can contact the polyacrylamide aqueous solution in the reaction chamber to detect the current passing through the polyacrylamide aqueous solution.

[0006] In some embodiments, the cathode plate is a stainless steel plate or a copper plate.

[0007] In some embodiments, the anode plate is a titanium-based plate or a graphite plate.

[0008] In some of the embodiments, the apparatus for detecting water-insoluble matter in polyacrylamide further comprises a stirrer, and the stirrer is located at the bottom of the reaction chamber to stir the polyacrylamide aqueous solution.

[0009] A method for detecting water-insoluble matter in polyacrylamide, using the device for detecting water-insoluble matter in polyacrylamide; the method comprises the following steps:

[0010] S1: prepare multiple portions of polyacrylamide standard aqueous solutions with different mass concentrations;

[0011] S2: adding one portion of the polyacrylamide standard aqueous solution into the reaction chamber, so that the cathode plate, the anode plate, the temperature sensor and the current detector are all in contact with the polyacrylamide standard aqueous solution;

[0012] S3: supplying power to the cathode plate and the anode plate through the power supply, thereby electrolyzing the polyacrylamide standard aqueous solution; detecting the temperature of the polyacrylamide standard aqueous solution through the temperature sensor; and detecting the current passing through the polyacrylamide standard aqueous solution through the current detector;

[0013] S4: Record the temperature and current when the results of the temperature sensor and the current detector are both stable, and record them as standard temperature and standard current respectively;

[0014] S5: removing the polyacrylamide standard aqueous solution in the reaction chamber;

[0015] S6: repeat S2-S5, and record the standard temperature and the standard current of the remaining polyacrylamide standard aqueous solutions;

[0016] S7: constructing a relationship between the mass concentration, the standard temperature and the standard current according to the standard temperature, the standard current and the mass concentration of each of the polyacrylamide standard aqueous solutions;

[0017] S8: adding the polyacrylamide aqueous solution to be tested into the reaction chamber, so that the cathode plate, the anode plate, the temperature sensor and the current detector are all in contact with the polyacrylamide aqueous solution to be tested;

[0018] S9: supplying power to the cathode plate and the anode plate through the power supply, thereby electrolyzing the polyacrylamide aqueous solution to be tested; detecting the temperature of the polyacrylamide aqueous solution to be tested through the temperature sensor; and detecting the current passing through the polyacrylamide aqueous solution to be tested through the current detector;

[0019] S10: Calculate the mass concentration of the polyacrylamide aqueous solution to be tested according to the temperature and current obtained in S9 and the relationship obtained in S8:

[0020] S11: Calculating the mass of polyacrylamide dissolved in the polyacrylamide aqueous solution to be tested according to the mass concentration obtained in S10;

[0021] S12: Calculate the mass of water-insoluble matter in the polyacrylamide aqueous solution to be tested according to the initial mass of polyacrylamide in the polyacrylamide aqueous solution to be tested and the mass of dissolved polyacrylamide obtained in S11.

[0022] In some embodiments, the mass concentration of the polyacrylamide standard aqueous solution is 0.1%-3%.

[0023] In some embodiments, the number of parts of the polyacrylamide standard aqueous solution is 5-10.

[0024] In some of the embodiments, the multiple portions of the polyacrylamide standard aqueous solution are arranged in ascending order of mass concentration, and the mass concentrations of the multiple portions of the polyacrylamide standard aqueous solution are distributed in an arithmetic progression.

[0025] In some embodiments, the difference between the mass concentrations of adjacent polyacrylamide standard aqueous solutions is 0.1% to 0.4%.

[0026] In some embodiments, the current density of the electrolysis in S3 is 1 mA / cm 2 -10mA / cm 2 .

[0027] Beneficial Effects

[0028] In the device for detecting water-insoluble matter of polyacrylamide of the present invention, the dissolution of polyacrylamide in water can be carried out in a reaction chamber, and the polyacrylamide aqueous solution is electrolyzed by a power supply, a cathode plate and an anode plate during and after the dissolution of polyacrylamide, so that the ions in the polyacrylamide aqueous solution can be enriched at the cathode plate and the anode plate, and the amount of anions and cations on the surface of the water-insoluble matter of polyacrylamide can be reduced, thereby reducing the interaction between the water-insoluble matter, reducing the interference of the interaction between the water-insoluble matter on the water-insoluble matter content detection process, and improving the accuracy of the water-insoluble matter content detection. In addition, the detection device does not need to rely on complex detection conditions during the detection process, the detection process is simple, the detection cost is low, and it is easy to promote.

[0029] The method for detecting water-insoluble matter of polyacrylamide of the present invention adopts the device for detecting water-insoluble matter of polyacrylamide, and can accurately test the content of water-insoluble matter of polyacrylamide. In addition, during the test process, after constructing the relationship between mass concentration and standard temperature and standard current according to the standard temperature, standard current and mass concentration of each standard polyacrylamide aqueous solution, when the water-insoluble matter of the subsequent polyacrylamide aqueous solution is detected, the relationship is directly used, and the temperature and current obtained by the temperature sensor and the current detector test can be brought into the method to quickly detect the content of water-insoluble matter of polyacrylamide. That is, the method for detecting water-insoluble matter of polyacrylamide can obtain more accurate test results while having higher test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the structure of a device for detecting water-insoluble matter in polyacrylamide in one embodiment of the present invention.

[0031] Description of the markings in the figure:

[0032] 10. Equipment for detecting water-insoluble matter in polyacrylamide; 101. Reaction chamber; 102. Temperature sensor; 103. Current detector; 104. Power supply; 105. Cathode plate; 106. Anode plate. DETAILED DESCRIPTION

[0033] See also Figure 1 According to an embodiment of the present invention, there is provided a device 10 for detecting water-insoluble matter in polyacrylamide. The device 10 for detecting water-insoluble matter in polyacrylamide comprises a reaction chamber 101, an electrolysis device, a temperature sensor 102 and a current detector 103. The reaction chamber 101 is used to contain a polyacrylamide aqueous solution. The electrolysis device comprises a power supply 104, a cathode plate 105 and an anode plate 106. The power supply 104 is connected to the cathode plate 105 and the anode plate 106 to supply power to the cathode plate 105 and the anode plate 106. One end of the cathode plate 105 away from the power supply 104 extends into the reaction chamber 101, and one end of the anode plate 106 away from the power supply 104 extends into the reaction chamber 101, and the cathode plate 105 and the anode plate 106 can contact the polyacrylamide aqueous solution in the reaction chamber 101 to electrolyze the polyacrylamide aqueous solution. The detection end of the temperature sensor 102 extends into the reaction chamber 101 and can contact the polyacrylamide aqueous solution in the reaction chamber 101 to detect the temperature of the polyacrylamide aqueous solution. The detection end of the current detector 103 extends into the reaction chamber 101 and can contact the polyacrylamide aqueous solution in the reaction chamber 101 to detect the current passing through the polyacrylamide aqueous solution.

[0034] In the device 10 for detecting water-insoluble polyacrylamide of the present embodiment, the dissolution of polyacrylamide in water can be carried out in the reaction chamber 101. During and after the dissolution of polyacrylamide, the polyacrylamide aqueous solution is electrolyzed by the power supply 104, the cathode plate 105 and the anode plate 106. The ions in the polyacrylamide aqueous solution can be enriched at the cathode plate 105 and the anode plate 106, and the amount of anions and cations on the surface of the polyacrylamide water-insoluble matter can be reduced, thereby reducing the interaction between the water-insoluble matter, reducing the interference of the interaction between the water-insoluble matter on the water-insoluble matter content detection process, and improving the accuracy of the water-insoluble matter content detection. In addition, the detection device does not need to rely on complex detection conditions during the detection process, the detection process is simple, the detection cost is low, and it is easy to promote.

[0035] In some embodiments, the cathode plate 105 is a stainless steel plate or a copper plate. The stainless steel plate has good mechanical strength and corrosion resistance, has good stability in aqueous solution, and is not easy to change in aqueous solution. In this way, the cathode plate 105 can reduce the impact on the aqueous solution while maintaining good self-stability, and reduce the impact of the cathode plate 105 on the test results. In addition, the stainless steel plate is easy to process and obtain, and the cost is moderate, which is conducive to reducing the cost of the detection equipment and expanding the scope of use of the detection equipment. The copper plate has good electrical conductivity and can conduct electrons efficiently. In addition, the reduction potential of copper is relatively low, which is conducive to promoting the reduction and enrichment of cations in the polyacrylamide aqueous solution.

[0036] In some of the embodiments, the anode plate 106 is a titanium-based plate or a graphite plate. The titanium-based plate has excellent corrosion resistance and electrochemical stability, and is not easy to change in the aqueous solution. This allows the anode plate 106 to reduce the impact on the aqueous solution while maintaining good self-stability, and reduces the impact of the anode plate 106 on the test results. Optionally, the titanium-based plate includes a titanium substrate and a ruthenium-iridium coating located on the surface of the titanium substrate. By setting the ruthenium-iridium coating, the catalytic activity of the anode plate 106 can be improved, and the enrichment of anions in the anode plate 106 can be promoted. The graphite plate has good chemical stability and relatively low cost, which can further reduce the cost of the detection equipment and expand the scope of use of the detection equipment.

[0037] In some embodiments, the device 10 for detecting water-insoluble polyacrylamide further includes a stirrer (not shown in the figure), which is located at the bottom of the reaction chamber 101 to stir the polyacrylamide aqueous solution. The stirring setting can make the polyacrylamide aqueous solution disperse more evenly, promote the enrichment of anions and cations at the electrode plate, and improve the detection efficiency of the device.

[0038] Another embodiment of the present invention provides a method for detecting water-insoluble polyacrylamide. The method for detecting water-insoluble polyacrylamide adopts the above-mentioned device 10 for detecting water-insoluble polyacrylamide. The method comprises the following steps: S1: preparing multiple portions of polyacrylamide standard aqueous solutions with different mass concentrations. S2: adding one portion of the polyacrylamide standard aqueous solution into the reaction chamber 101, so that the cathode plate 105, the anode plate 106, the temperature sensor 102 and the current detector 103 are all in contact with the polyacrylamide standard aqueous solution. S3: supplying power to the cathode plate 105 and the anode plate 106 through the power supply 104, thereby electrolyzing the polyacrylamide standard aqueous solution. The temperature of the polyacrylamide standard aqueous solution is detected by the temperature sensor 102. The current passing through the polyacrylamide standard aqueous solution is detected by the current detector 103. S4: recording the temperature and current when the results of the temperature sensor 102 and the current detector 103 are both stable, and recording them as the standard temperature and standard current respectively. S5: removing the polyacrylamide standard aqueous solution in the reaction chamber 101. S6: Repeat S2-S5, and record the standard temperature and the standard current of the remaining polyacrylamide standard aqueous solutions. S7: According to the standard temperature, the standard current and the mass concentration of each polyacrylamide standard aqueous solution, construct a relationship between the mass concentration and the standard temperature and the standard current. S8: Add the polyacrylamide aqueous solution to be tested into the reaction chamber 101, so that the cathode plate 105, the anode plate 106, the temperature sensor 102 and the current detector 103 are all in contact with the polyacrylamide aqueous solution to be tested. S9: Power the cathode plate 105 and the anode plate 106 through the power supply 104, and then electrolyze the polyacrylamide aqueous solution to be tested. The temperature of the polyacrylamide aqueous solution to be tested is detected by the temperature sensor 102. The current passing through the polyacrylamide aqueous solution to be tested is detected by the current detector 103. S10: According to the temperature and current obtained in S9, the mass concentration of the polyacrylamide aqueous solution to be tested is calculated in combination with the relationship obtained in S8. S11: According to the mass concentration obtained in S10, the mass of polyacrylamide dissolved in the polyacrylamide aqueous solution to be tested is calculated. S12: Calculate the mass of water-insoluble matter in the polyacrylamide aqueous solution to be tested according to the initial mass of polyacrylamide in the polyacrylamide aqueous solution to be tested and the mass of dissolved polyacrylamide obtained in S11.

[0039] The method for detecting water-insoluble polyacrylamide in the present embodiment uses the device 10 for detecting water-insoluble polyacrylamide, and can accurately test the content of water-insoluble polyacrylamide. In addition, during the test, after constructing the relationship between mass concentration and standard temperature and standard current according to the standard temperature, standard current and mass concentration of each standard polyacrylamide aqueous solution, when the water-insoluble polyacrylamide aqueous solution is detected, the relationship is directly used, and the temperature and current obtained by the temperature sensor 102 and the current detector 103 can be brought into the test to quickly detect the content of water-insoluble polyacrylamide. That is, the method for detecting water-insoluble polyacrylamide can obtain more accurate test results while having higher test efficiency.

[0040] It can be understood that the formula for calculating the mass of water-insoluble matter in the polyacrylamide aqueous solution to be tested in S12 based on the initial mass of polyacrylamide in the polyacrylamide aqueous solution to be tested and the mass of dissolved polyacrylamide obtained in S11 is: the mass of water-insoluble matter in the polyacrylamide aqueous solution to be tested = the initial mass of polyacrylamide in the polyacrylamide aqueous solution to be tested - the mass of dissolved polyacrylamide obtained in S11.

[0041] It can be understood that the current density when the polyacrylamide standard aqueous solution and the polyacrylamide aqueous solution to be tested are electrolyzed is equal.

[0042] In some embodiments, the mass concentration of the polyacrylamide standard aqueous solution is 0.1%-3%. The mass concentration of the polyacrylamide standard aqueous solution can obtain a more suitable temperature and current in this range, so that the results detected by the temperature sensor 102 and the current detector 103 are more accurate and stable, which is conducive to further improving the accuracy of the detection of the water-insoluble content of polyacrylamide. The mass concentration of the polyacrylamide standard aqueous solution can be 0.1%, 0.15%, 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, 0.45%, 0.5%, 0.55%, 0.6%, 0.65%, 0.7%, 0.75%, 0.8%, 0.85%, 0.9%, 0.95%, 1%, 1.2%, 1.5%, 1.8%, 2%, 2.2%, 2.5%, 2.8%, 3%, etc. It can be understood that the mass concentration of the polyacrylamide standard aqueous solution can also be other suitable choices within the range of 0.1%-3%.

[0043] In some embodiments, the polyacrylamide standard aqueous solution has a number of parts ranging from 5 to 10. The accuracy of the relationship between mass concentration, temperature and current can be improved by using a suitable number of polyacrylamide standard aqueous solution, and the accuracy of the detection of the polyacrylamide water-insoluble content can be further improved. Optionally, the number of parts of the polyacrylamide standard aqueous solution can be 5, 6, 7, 8, 9, 10, etc.

[0044] In some embodiments, the multiple portions of the polyacrylamide standard aqueous solution are arranged from small to large according to mass concentration, and the mass concentrations of the multiple portions of the polyacrylamide standard aqueous solution are distributed in an arithmetic progression. The mass concentrations of the multiple portions of the polyacrylamide standard aqueous solution are distributed in an arithmetic progression, which can more accurately fit the relationship between mass concentration and temperature and current, and further improve the accuracy of the detection of the water-insoluble content of polyacrylamide.

[0045] In some embodiments, the difference between the mass concentrations of adjacent polyacrylamide standard aqueous solutions is 0.1% to 0.4%. The difference between the mass concentrations of adjacent polyacrylamide standard aqueous solutions within this range can make the mass concentration gradient of the polyacrylamide standard aqueous solution more concentrated, further improving the accuracy of the detection of the water-insoluble content of polyacrylamide. Optionally, the difference between the mass concentrations of adjacent polyacrylamide standard aqueous solutions can be 0.1%, 0.15%, 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, etc. It is understandable that the difference between the mass concentrations of adjacent polyacrylamide standard aqueous solutions can also make other suitable choices within the range of 0.1% to 0.4%.

[0046] In some embodiments, the current density of the electrolysis in S3 is 1 mA / cm 2 -10mA / cm 2 If the current density of electrolysis is too small, the enrichment rate of anions and cations in the polyacrylamide aqueous solution is too slow, which is not conducive to improving the detection efficiency of the water-insoluble content. If the current density of electrolysis is too large, it may destroy the overall system of the polyacrylamide aqueous solution, have an adverse effect on the polyacrylamide aqueous solution, and reduce the detection accuracy of the water-insoluble content. Optionally, the current density of electrolysis in S3 is 1 mA / cm 2 , 2mA / cm 2 , 3mA / cm 2 , 4mA / cm 2 , 5mA / cm 2 , 6mA / cm 2 , 7mA / cm 2 , 8mA / cm 2 , 9mA / cm 2 , 10mA / cm 2 It is understandable that the current density of electrolysis in S3 can also be 1 mA / cm 2 -10mA / cm 2 Make other appropriate choices within the scope.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0048] For those skilled in the art, according to the concept of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A method for detecting water-insoluble matter in polyacrylamide, characterized in that: A device for detecting water-insoluble matter of polyacrylamide is used; the device comprises a reaction chamber, an electrolysis device, a temperature sensor and a current detector; the reaction chamber is used to contain a polyacrylamide aqueous solution; the electrolysis device comprises a power supply, a cathode plate and an anode plate; the power supply is connected to the cathode plate and the anode plate to supply power to the cathode plate and the anode plate; the end of the cathode plate away from the power supply extends into the reaction chamber, and the end of the anode plate away from the power supply extends into the reaction chamber, and the cathode plate and the anode plate can contact the polyacrylamide aqueous solution in the reaction chamber to electrolyze the polyacrylamide aqueous solution; the detection end of the temperature sensor extends into the reaction chamber and can contact the polyacrylamide aqueous solution in the reaction chamber to detect the temperature of the polyacrylamide aqueous solution; the detection end of the current detector extends into the reaction chamber and can contact the polyacrylamide aqueous solution in the reaction chamber to detect the current passing through the polyacrylamide aqueous solution; The method comprises the following steps: S1: preparing a plurality of polyacrylamide standard aqueous solutions of different mass concentrations; the mass concentration of the polyacrylamide standard aqueous solution is 0.1%-3%; the plurality of polyacrylamide standard aqueous solutions are arranged from small to large in terms of mass concentration, and the mass concentrations of the plurality of polyacrylamide standard aqueous solutions are distributed in an arithmetic progression; the difference between the mass concentrations of adjacent polyacrylamide standard aqueous solutions is 0.1%-0.4%; S2: adding one portion of the polyacrylamide standard aqueous solution into the reaction chamber, so that the cathode plate, the anode plate, the temperature sensor and the current detector are all in contact with the polyacrylamide standard aqueous solution; S3: The cathode plate and the anode plate are powered by the power supply to electrolyze the polyacrylamide standard aqueous solution; the temperature of the polyacrylamide standard aqueous solution is detected by the temperature sensor; the current passing through the polyacrylamide standard aqueous solution is detected by the current detector; the current density of the electrolysis is 1 mA / cm 2 -10mA / cm 2 ; S4: Record the temperature and current when the results of the temperature sensor and the current detector are both stable, and record them as standard temperature and standard current respectively; S5: removing the polyacrylamide standard aqueous solution in the reaction chamber; S6: repeat S2-S5, and record the standard temperature and the standard current of the remaining polyacrylamide standard aqueous solutions; S7: constructing a relationship between the mass concentration, the standard temperature and the standard current according to the standard temperature, the standard current and the mass concentration of each of the polyacrylamide standard aqueous solutions; S8: adding the polyacrylamide aqueous solution to be tested into the reaction chamber, so that the cathode plate, the anode plate, the temperature sensor and the current detector are all in contact with the polyacrylamide aqueous solution to be tested; S9: supplying power to the cathode plate and the anode plate through the power supply, thereby electrolyzing the polyacrylamide aqueous solution to be tested; detecting the temperature of the polyacrylamide aqueous solution to be tested through the temperature sensor; Detecting the current passing through the polyacrylamide aqueous solution to be tested by the current detector; S10: Calculate the mass concentration of the polyacrylamide aqueous solution to be tested based on the temperature and current obtained in S9 and the relationship obtained in S7: S11: Calculating the mass of polyacrylamide dissolved in the polyacrylamide aqueous solution to be tested according to the mass concentration obtained in S10; S12: Calculate the mass of water-insoluble matter in the polyacrylamide aqueous solution to be tested according to the initial mass of polyacrylamide in the polyacrylamide aqueous solution to be tested and the mass of dissolved polyacrylamide obtained in S11.

2. The method for detecting water-insoluble matter in polyacrylamide according to claim 1, characterized in that: The number of parts of the polyacrylamide standard aqueous solution is 5-10.

3. The method for detecting water-insoluble matter in polyacrylamide according to any one of claims 1 to 2, characterized in that: The cathode plate is a stainless steel plate or a copper plate.

4. The method for detecting water-insoluble matter in polyacrylamide according to any one of claims 1 to 2, characterized in that: The anode plate is a titanium-based plate or a graphite plate.

5. The method for detecting water-insoluble matter in polyacrylamide according to any one of claims 1 to 2, characterized in that: The device also includes a stirrer, which is located at the bottom of the reaction chamber to stir the polyacrylamide aqueous solution.

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