Continuous flow ion chromatography combination system

Abstract

The invention discloses a continuous flow ion chromatography combined system, which relates to the technical field of industrial water treatment, and comprises a total phosphorus content analysis continuous flow module and an inorganic phosphorus content analysis ion chromatography module, the total phosphorus content analysis continuous flow module is used for detecting the total phosphorus content and comprises a peristaltic pump, a mixed reaction coil, an ultraviolet digester, a first heating reaction tank, a second heating reaction tank and a flow detection tank, and the inorganic phosphorus content analysis ion chromatography module is used for detecting the inorganic phosphorus content and comprises a sample valve, a guard column, an ion chromatographic column, a suppressor and a detector. According to the continuous flow ion chromatography combined system, the total phosphorus content analysis continuous flow module and the inorganic phosphorus content analysis ion chromatography module work independently and do not interfere with each other, the total phosphate content, the organic phosphorus content and the inorganic phosphorus content in the phosphorus-containing scale inhibitor can be detected at the same time at a time, phosphorus-containing water treatment agent samples in the two modules cannot be subjected to cross contamination, and the detection accuracy is high. The interference of human factors on the detection result is reduced, and the accuracy is high.

Description

Technical Field

[0001] The invention relates to the technical field of industrial water treatment, in particular to a continuous flow ion chromatography coupling system. Background Art

[0002] Scale inhibitors are a type of agent that can disperse insoluble inorganic salts in water, prevent or interfere with the precipitation and scaling of insoluble inorganic salts on metal surfaces, and maintain good heat transfer effects on metal equipment. They mainly include inorganic phosphorus-containing polymer scale inhibitors, composite phosphates, organic phosphates, and other low-phosphorus or phosphorus-free agents. Phosphorus-containing scale inhibitors have good chemical stability, can withstand high temperatures and pH, and can be used in combination with other scale inhibitors, so they are widely used in circulating cooling water systems.

[0003] The total phosphate, organic phosphorus and inorganic phosphorus content are important indicators for evaluating the performance of phosphorus-containing scale inhibitors. At present, the main detection methods for the phosphorus content of phosphorus-containing scale inhibitors include: spectrophotometry, gravimetric analysis, inductively coupled plasma emission spectrometry, inductively coupled plasma mass spectrometry, volumetric analysis, ion chromatography, gas chromatography-mass spectrometry, and liquid chromatography-mass spectrometry.

[0004] During the detection process, it was found that the existing method can only use different instruments to detect the total phosphate, organic phosphorus and inorganic phosphorus content in phosphorus-containing scale inhibitors respectively, which is time-consuming and labor-consuming, and cannot achieve online, rapid, and large-scale detection of samples; because the phosphate solution is volatile, it is impossible to avoid the detection error caused by inconsistent sample detection time, and the accuracy is low. Therefore, how to provide a device that can simultaneously detect the total phosphate, organic phosphorus and inorganic phosphorus content of phosphorus-containing scale inhibitors online at one time is a problem that needs to be solved by technicians in this field. Summary of the invention

[0005] The purpose of the present invention is to provide a continuous flow ion chromatography coupling system, which solves the technical problem that the current method for detecting the phosphorus content of phosphorus-containing scale inhibitors cannot achieve one-time and simultaneous online detection of samples.

[0006] To achieve the above object, the present invention provides a continuous flow ion chromatography system, comprising:

[0007] A total phosphorus content analysis continuous flow module is used to detect the total phosphorus content. The total phosphorus content analysis continuous flow module comprises a peristaltic pump and a flow detection cell, and the peristaltic pump is connected to the flow detection cell;

[0008] An inorganic phosphorus content analysis ion chromatography module is used to detect the inorganic phosphorus content. The inorganic phosphorus content analysis ion chromatography module comprises an injection valve and a detector, and the injection valve is connected to the detector;

[0009] Among them, the pre-treated phosphorus-containing scale inhibitor test solution flows to the total phosphorus content analysis continuous flow module and the inorganic phosphorus content analysis ion chromatography module respectively. The pre-treated phosphorus-containing scale inhibitor test solution enters the total phosphorus content analysis continuous flow module through the peristaltic pump, and the total phosphorus content is obtained by detection through the flow detection cell. The pre-treated phosphorus-containing scale inhibitor test solution enters the inorganic phosphorus content analysis ion chromatography module through the injection valve, and the inorganic phosphorus content is obtained by detection through the detector. The organic phosphorus content is the difference between the total phosphorus content and the inorganic phosphorus content.

[0010] Preferably, the total phosphorus content analysis continuous flow module also includes a mixed reaction coil, an ultraviolet digester, a first heating reaction tank and a second heating reaction tank. The pre-treated phosphorus-containing scale inhibitor test solution is treated by the mixed reaction coil, the ultraviolet digester, the first heating reaction tank and the second heating reaction tank, and then the total phosphorus content is detected by the flow detection tank.

[0011] Preferably, the inorganic phosphorus content analysis ion chromatography module also includes a guard column, an ion chromatography column and a suppressor. After the pre-treated phosphorus-containing scale inhibitor test solution is treated by the guard column, the ion chromatography column and the suppressor, the inorganic phosphorus content is detected by the detector.

[0012] Preferably, it also includes:

[0013] A solution pre-treatment device is connected to the phosphorus-containing scale inhibitor test solution through a pipeline, and is used for precipitating, removing impurities and filtering the phosphorus-containing scale inhibitor test solution;

[0014] An automatic sample injector is connected to the solution pretreatment device, and includes a dilution sample injector, wherein the dilution sample injector is used to dilute the phosphorus-containing scale inhibitor solution. The dilution sample injector is provided with an injection pump, and the injection pump is connected to the injection valve and the peristaltic pump, and is used to inject the diluted phosphorus-containing scale inhibitor solution to be tested into the injection valve and the peristaltic pump.

[0015] Preferably, the inorganic phosphorus content analysis ion chromatography module further comprises:

[0016] An eluent bottle, containing eluent;

[0017] A high-pressure pump, connected to the eluent bottle, for delivering the eluent into the injection valve;

[0018] A suppressor liquid conveyor is connected to the suppressor and is used to input suppressor liquid into the suppressor.

[0019] Preferably, it also includes:

[0020] workstations, including personal computers;

[0021] A waste liquid device, connected to the injection valve, the suppressor, the detector, and the flow detection cell, and used for collecting waste liquid;

[0022] A control device, connected to the peristaltic pump, the ultraviolet digester, the first heating reaction pool, the second heating reaction pool, the flow detection pool, the automatic sampler, the injection valve, the high-pressure pump, the detector, and the workstation by signal;

[0023] The control device converts the ion component concentration electrical signals output by the flow detection cell and the detector into digital signals and transmits them to the personal computer, and the personal computer performs ion analysis on the transmitted digital signals.

[0024] Preferably, the dilution and sampling device is further provided with a piston pump, a reagent sprayer and a sample suction needle, wherein the piston pump is used to control the suction and spraying of the phosphorus-containing scale inhibitor solution to be tested, and the reagent sprayer is used to apply the diluent and clean the sample suction needle.

[0025] Preferably, the dilution and sampling device is also connected to a collection position of a solution to be tested of the phosphorus-containing scale inhibitor and a water injection position for washing needles through pipelines.

[0026] Preferably, the eluent in the eluent bottle is a carbonate or bicarbonate type eluent.

[0027] Preferably, a quantitative ring is arranged in the injection valve.

[0028] Compared with the above background technology, the continuous flow ion chromatography coupling system provided by the present invention, the phosphorus-containing scale inhibitor test solution after pre-treatment flows to the total phosphorus content analysis continuous flow module and the inorganic phosphorus content analysis ion chromatography module respectively, the total phosphorus content is detected by the total phosphorus content analysis continuous flow module, the inorganic phosphorus content is detected by the inorganic phosphorus content analysis ion chromatography module, and the organic phosphorus content is calculated by subtracting the total phosphorus content from the inorganic phosphorus content, thereby realizing the one-time simultaneous online detection of the total phosphate, organic phosphorus and inorganic phosphorus content in the phosphorus-containing scale inhibitor. The total phosphorus content analysis continuous flow module and the inorganic phosphorus content analysis ion chromatography module work independently and do not interfere with each other. The phosphorus-containing water treatment agent samples in the two groups of modules will not be cross-contaminated, which reduces the interference of human factors on the test results and has high accuracy; the entire detection process has a high degree of automation, reduces the labor intensity of operators, and has high detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0030] FIG1 is a schematic diagram of the structure of a continuous flow ion chromatography coupling system provided in an embodiment of the present invention;

[0031] The accompanying drawings in Figure 1 are as follows: 1. peristaltic pump; 2. mixing reaction coil; 3. UV digester; 4. first heating reaction cell; 5. second heating reaction cell; 6. flow detection cell; 7. solution pretreatment device; 8. automatic sample injector; 9. injection valve; 10. quantitative loop; 11. eluent bottle; 12. high-pressure pump; 13. guard column; 14. ion chromatography column; 15. suppressor liquid conveyor; 16. suppressor; 17. detector; 18. control device; 19. workstation; 20. waste liquid device. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] The present invention provides a continuous flow ion chromatography coupling system, which is used for detecting the total phosphate, organic phosphorus and inorganic phosphorus contents of a phosphorus-containing scale inhibitor. The total phosphorus content in the phosphorus-containing scale inhibitor is detected by a continuous flow module, the inorganic phosphorus content is detected by an ion chromatography module, and the organic phosphorus content is calculated by subtracting the total phosphorus content from the inorganic phosphorus content. The total phosphate, organic phosphorus and inorganic phosphorus contents in the phosphorus-containing scale inhibitor are detected online at one time, which can effectively reduce the detection error and ensure the detection accuracy.

[0035] Please refer to Figure 1. The continuous flow ion chromatography combined system provided by the present invention includes a total phosphorus content analysis continuous flow module and an inorganic phosphorus content analysis ion chromatography module; the total phosphorus content analysis continuous flow module is used to detect the total phosphorus content, and the total phosphorus content analysis continuous flow module includes a peristaltic pump 1 and a flow detection cell 6, and the peristaltic pump 1 is connected to the flow detection cell 6; the inorganic phosphorus content analysis ion chromatography module is used to detect the inorganic phosphorus content, and the inorganic phosphorus content analysis ion chromatography module includes an injection valve 9 and a detector 17, and the injection valve 9 is connected to the detector 17.

[0036] Among them, the pre-treated phosphorus-containing scale inhibitor test solution flows to the total phosphorus content analysis continuous flow module and the inorganic phosphorus content analysis ion chromatography module respectively. The pre-treated phosphorus-containing scale inhibitor test solution enters the total phosphorus content analysis continuous flow module through the peristaltic pump 1, and the total phosphorus content is detected by the flow detection cell 6. The pre-treated phosphorus-containing scale inhibitor test solution enters the inorganic phosphorus content analysis ion chromatography module through the injection valve 9, and the inorganic phosphorus content is detected by the detector 17. The organic phosphorus content is the difference between the total phosphorus content and the inorganic phosphorus content.

[0037] With this arrangement, the total phosphorus content analysis continuous flow module and the inorganic phosphorus content analysis ion chromatography module work independently without interfering with each other. The total phosphate, organic phosphorus and inorganic phosphorus content in the phosphorus-containing scale inhibitor can be detected at one time. The phosphorus-containing water treatment agent samples in the two groups of modules will not be cross-contaminated, which reduces the interference of human factors on the test results and has high accuracy. The entire test process has a high degree of automation, reduces the labor intensity of operators, and has high test efficiency. The continuous flow ion chromatography coupling system can be applied to the field of industrial circulating water detection in the field of water treatment, and realizes accurate, large-scale and rapid determination of the total phosphate, organic phosphorus and inorganic phosphorus content in phosphorus-containing scale inhibitors and industrial circulating water, and has strong applicability.

[0038] Please refer to Figure 1. In the continuous flow ion chromatography system provided by the present invention, the continuous flow module for total phosphorus content analysis also includes a mixed reaction coil 2, an ultraviolet digester 3, a first heating reaction tank 4 and a second heating reaction tank 5. The pre-treated phosphorus-containing scale inhibitor test solution is treated by the mixed reaction coil 2, the ultraviolet digester 3, the first heating reaction tank 4 and the second heating reaction tank 5, and the total phosphorus content is obtained by detection through the flow detection tank 6.

[0039] Specifically, the working process of the total phosphorus content analysis continuous flow module is as follows: the phosphorus scale inhibitor solution to be tested is mixed with the potassium persulfate A2 solution and then subjected to ultraviolet digestion in the ultraviolet digester 3, and the digestion product is then mixed with the sulfuric acid solution A3, and then flows through the first heating reaction tank 4 to obtain an acidic digestion solution, and the above acidic digestion solution is mixed with the sodium hydroxide solution A5 to obtain a neutralized digestion solution, and the above neutralized digestion solution is mixed with the molybdenum antimony mixed solution A6 and the ascorbic acid solution A7, and then flows through the second heating reaction tank 5 to generate an antimony-phosphate-molybdate complex solution, and the antimony-phosphate-molybdate complex solution and the ascorbic acid solution A7 flow into the detection tank 6, and the ascorbic acid A7 is used as a color developer to perform absorbance measurement, and then the total phosphorus content in the phosphorus-containing water treatment agent sample is obtained. Preferably, the temperature of the first heating reaction tank 4 is 110°C, and the temperature of the second heating reaction tank 5 is 40°C.

[0040] Please refer to Figure 1. In the continuous flow ion chromatography system provided by the present invention, the inorganic phosphorus content analysis ion chromatography module also includes a protective column 13, an ion chromatography column 14 and a suppressor 16. After the pre-treated phosphorus-containing scale inhibitor test solution is treated by the protective column 13, the ion chromatography column 14 and the suppressor 16, the inorganic phosphorus content is detected by the detector 17.

[0041] Specifically, the working process of the inorganic phosphorus content analysis ion chromatography module is as follows: the phosphorus scale inhibitor test solution is mixed with the eluent 11 through the injection valve 9 and enters the protection column 13, is separated through the ion chromatography column 14, enters the suppressor 16 to reduce the background conductivity, and then the inorganic phosphorus content in the phosphorus water treatment agent sample is detected by the detector 17. The organic phosphorus content is the difference between the total phosphorus content and the inorganic phosphorus content.

[0042] The special packing material used in the protective column 13 is the same as the packing material of the ion chromatographic column 14, which plays a role in protecting the ion chromatographic column 14. The ion chromatographic column 14 can select other types of polymer resin column chromatographic columns with surface amino. The suppressor 16 is a self-regenerating anion suppressor, which is used to convert the eluent passing through into carbonic acid online, reduce the background conductivity of the mobile phase, increase the conductivity response value of the ion to be measured and allow the "counter ion" to enter the waste liquid device 20, thereby improving the sensitivity. The detector 17 can adopt a five-pole conductivity detector.

[0043] Preferably, the continuous flow ion chromatography system provided by the present invention also includes a solution pretreatment device 7 and an automatic sampler 8, and the phosphorus-containing scale inhibitor test solution is pretreated by the solution pretreatment device 7 and the automatic sampler 8; the solution pretreatment device 7 is connected to the phosphorus-containing scale inhibitor test solution through a pipeline, and the solution pretreatment device 7 is used to precipitate, remove impurities and filter the phosphorus-containing scale inhibitor test solution; the automatic sampler 8 is connected to the solution pretreatment device 7, and the automatic sampler 8 includes a dilution injection device, which is used to dilute the phosphorus-containing scale inhibitor solution, and the dilution injection device is provided with an injection pump, which is connected to the injection valve 9 and the peristaltic pump 1, and is used to inject the diluted phosphorus-containing scale inhibitor test solution into the injection valve 9 and the peristaltic pump 1.

[0044] The phosphorus-containing scale inhibitor solution to be tested is transported into the pretreatment device 7 through a pipeline. After being processed by the pretreatment device 7 such as precipitation, impurity removal and filtration, the phosphorus-containing scale inhibitor solution to be tested enters the automatic sampler 8. The dilution injection device of the automatic sampler 8 dilutes the phosphorus-containing scale inhibitor solution by a corresponding multiple. The built-in injection pump of the dilution injection device injects the diluted phosphorus-containing scale inhibitor solution to be tested into the injection valve 9 and the peristaltic pump 1, thereby inputting a part of the phosphorus-containing scale inhibitor solution to be tested after pretreatment into the total phosphorus content analysis continuous flow module to detect the total phosphorus content, and inputting another part of the phosphorus-containing scale inhibitor solution to be tested into the inorganic phosphorus content analysis ion chromatography module to detect the inorganic phosphorus content.

[0045] Please refer to Figure 1, the inorganic phosphorus content analysis ion chromatography module also includes an eluent bottle 11, a high-pressure pump 12 and a suppressor liquid conveyor 15; the eluent bottle 11 is provided with eluent; the high-pressure pump 12 is connected to the eluent bottle 11, and the high-pressure pump 12 is used to convey the eluent into the injection valve 9; the suppressor liquid conveyor 15 is connected to the suppressor 16, and the suppressor liquid conveyor 15 is used to input suppressor liquid into the suppressor 16.

[0046] When the inorganic phosphorus content analysis ion chromatography module detects the inorganic phosphorus content, the high-pressure pump 12 brings the eluent in the eluent bottle 11 into the injection valve 9, and the eluent is mixed with the pre-treated phosphorus-containing scale inhibitor test solution, and then enters the protection column 13, is separated by the ion chromatography column 14, and then enters the suppressor 16. The suppressor liquid conveyor 15 inputs the suppressor liquid to the suppressor 16 to reduce the background conductivity, and finally the inorganic phosphorus content in the phosphorus-containing water treatment agent sample is detected by the detector 17. Among them, the high-pressure pump 12 adopts a high-pressure, small-flow and adjustable digital display high-pressure horizontal flow pump.

[0047] Please refer to Figure 1. The continuous flow ion chromatography system provided by the present invention also includes a workstation 19, a waste liquid device 20 and a control device 18; the workstation 19 includes a personal computer and console software; the waste liquid device 20 is connected to the injection valve 9, the suppressor 16, the detector 17, and the flow detection pool 6 for collecting waste liquid; the control device 18 is signal-connected to the peristaltic pump 1, the ultraviolet digester 3, the first heating reaction pool 4, the second heating reaction pool 5, the flow detection pool 6, the automatic sampler 8, the injection valve 9, the high-pressure pump 12, the detector 17, and the workstation 19; wherein the control device 18 converts the ion component concentration electrical signal output by the flow detection pool 6 and the detector 17 into a digital signal and transmits it to the personal computer, performs ion analysis on the transmitted digital signal through the console software, and generates a report after the ion analysis, thereby realizing online detection and analysis of the phosphorus-containing scale inhibitor solution to be tested.

[0048] Preferably, in this embodiment, the dilution and sampling device is provided with a piston pump, a reagent sprayer and a sample suction needle, the piston pump is used to control the suction and spraying of the pre-treated phosphorus-containing scale inhibitor test solution, the reagent sprayer is used to apply the diluent and clean the sample suction needle, wherein the reagent sprayer cleans the sample suction needle by spraying the needle washing solution.

[0049] Preferably, in this embodiment, the dilution and injection device is also connected to the phosphorus-containing scale inhibitor test solution collection position and the needle washing water injection position through pipelines, so that the dilution and serial dilution tasks, including the standard sample configuration work, can be automatically completed.

[0050] Please refer to Figure 1. In this embodiment, the injection valve 9 is an electromagnetic two-position six-way valve with injection and analysis positions. A quantitative ring 10 is provided in the injection valve 9. By providing the quantitative ring 10, the accuracy and consistency of injection are ensured.

[0051] Preferably, the eluent in the eluent bottle 11 uses a carbonate or bicarbonate type eluent. When the inorganic phosphorus content analysis ion chromatography module detects the inorganic phosphorus content, the high-pressure pump 12 brings the eluent in the eluent bottle 11 into the injection valve 9 for isocratic elution.

[0052] When the continuous flow ion chromatography combined system provided by the present invention is working, first, the phosphorus-containing scale inhibitor solution to be tested is transported into the pretreatment device 7 through a pipeline, and the phosphorus-containing scale inhibitor solution to be tested is subjected to precipitation, impurity removal and filtration and other treatments by the pretreatment device 7 before entering the automatic sampler 8, and the dilution injection device of the automatic sampler 8 dilutes the phosphorus-containing scale inhibitor solution by a corresponding multiple, and the built-in injection pump of the dilution injection device injects the diluted phosphorus-containing scale inhibitor solution to be tested into the injection valve 9 and the peristaltic pump 1, so that a part of the phosphorus-containing scale inhibitor solution to be tested after pretreatment is input into the total phosphorus content analysis continuous flow module to detect the total phosphorus content, and the other part of the phosphorus-containing scale inhibitor solution to be tested is input into the inorganic phosphorus content analysis ion chromatography module to detect the inorganic phosphorus content.

[0053] The working process of the total phosphorus content analysis continuous flow module is as follows:

[0054] a) air B, potassium persulfate solution A2, a phosphorus-containing scale inhibitor solution to be tested treated by a pretreatment device 7 and an automatic sampler 8, and a sulfuric acid solution A3 are sequentially introduced into a peristaltic pump 1; the phosphorus-containing scale inhibitor solution to be tested is mixed with the potassium persulfate solution A2, and then ultraviolet digestion is performed in an ultraviolet digester 3, and then the digestion product is mixed with the sulfuric acid solution A3, and then the mixture flows through a first heating reaction tank 4 to obtain an acidic digestion solution;

[0055] b) air B and sodium hydroxide solution A5 are sequentially introduced into the peristaltic pump 1; the acidic digestion solution flowing out of the first heating reaction tank 4 is mixed with the introduced sodium hydroxide solution A5 to neutralize the residual sulfuric acid in the acidic digestion solution to obtain a neutralized digestion solution;

[0056] c) introducing a molybdenum-antimony mixed solution A6 and an ascorbic acid solution A7 into a peristaltic pump 1 in sequence, wherein the molybdenum-antimony mixed solution A6 contains ammonium molybdate, sulfuric acid and potassium antimony tartrate; the neutralized digestion solution is mixed with the introduced molybdenum-antimony mixed solution A6 and the ascorbic acid solution A7, and after mixing, the mixture flows through a second heating reaction tank 5, and is heated in the second heating reaction tank 5 to generate an antimony-phosphate-molybdate complex solution;

[0057] d) The antimony-phosphate-molybdate complex solution and the ascorbic acid solution A7 flow into the flow detection cell 6, and the absorbance is measured using ascorbic acid A7 as a color developer to obtain the total phosphorus content in the phosphorus-containing water treatment agent sample.

[0058] The working process of the inorganic phosphorus content analysis ion chromatography module is as follows:

[0059] The phosphorus-containing scale inhibitor test solution is mixed with the eluent 11 brought in by the high-pressure pump 12 through the injection valve 9, and then enters the protection column 13, is separated by the ion chromatography column 14, enters the suppressor 16 to reduce the background conductivity, and then is detected by the detector 17 to detect the inorganic phosphorus (phosphate and phosphite) content in the phosphorus-containing water treatment agent sample.

[0060] In this way, the total phosphorus content and inorganic phosphorus content in the phosphorus-containing scale inhibitor can be detected, and the organic phosphorus content is the difference between the total phosphorus content and the inorganic phosphorus content, thereby realizing the one-time simultaneous online detection of the total phosphate, organic phosphorus and inorganic phosphorus content in the phosphorus-containing scale inhibitor, with high detection efficiency and accuracy. The continuous flow ion chromatography coupling system provided by the present invention can be used for the detection of phosphorus content in industrial circulating water.

[0061] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0062] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A continuous flow ion chromatography system, characterized in that: include: A total phosphorus content analysis continuous flow module is used to detect the total phosphorus content. The total phosphorus content analysis continuous flow module comprises a peristaltic pump and a flow detection cell, and the peristaltic pump is connected to the flow detection cell; An inorganic phosphorus content analysis ion chromatography module is used to detect the inorganic phosphorus content. The inorganic phosphorus content analysis ion chromatography module comprises an injection valve and a detector, and the injection valve is connected to the detector; Among them, the pre-treated phosphorus-containing scale inhibitor test solution flows to the total phosphorus content analysis continuous flow module and the inorganic phosphorus content analysis ion chromatography module respectively. The pre-treated phosphorus-containing scale inhibitor test solution enters the total phosphorus content analysis continuous flow module through the peristaltic pump, and the total phosphorus content is obtained by detection through the flow detection cell. The pre-treated phosphorus-containing scale inhibitor test solution enters the inorganic phosphorus content analysis ion chromatography module through the injection valve, and the inorganic phosphorus content is obtained by detection through the detector. The organic phosphorus content is the difference between the total phosphorus content and the inorganic phosphorus content.

2. The continuous flow ion chromatography system according to claim 1, characterized in that: The total phosphorus content analysis continuous flow module also includes a mixed reaction coil, an ultraviolet digester, a first heating reaction tank and a second heating reaction tank. The pre-treated phosphorus-containing scale inhibitor test solution is treated by the mixed reaction coil, the ultraviolet digester, the first heating reaction tank and the second heating reaction tank, and then the total phosphorus content is detected by the flow detection tank.

3. The continuous flow ion chromatography system according to claim 2, characterized in that: The inorganic phosphorus content analysis ion chromatography module also includes a guard column, an ion chromatography column and a suppressor. After the pre-treated phosphorus scale inhibitor test solution is treated by the guard column, the ion chromatography column and the suppressor, the inorganic phosphorus content is detected by the detector.

4. The continuous flow ion chromatography system according to claim 3, characterized in that: Also includes: A solution pre-treatment device is connected to the phosphorus-containing scale inhibitor test solution through a pipeline, and is used for precipitating, removing impurities and filtering the phosphorus-containing scale inhibitor test solution; An automatic sample injector is connected to the solution pretreatment device, and includes a dilution sample injector, wherein the dilution sample injector is used to dilute the phosphorus-containing scale inhibitor solution. The dilution sample injector is provided with an injection pump, and the injection pump is connected to the injection valve and the peristaltic pump, and is used to inject the diluted phosphorus-containing scale inhibitor solution to be tested into the injection valve and the peristaltic pump.

5. The continuous flow ion chromatography system according to claim 4, characterized in that: The inorganic phosphorus content analysis ion chromatography module also includes: An eluent bottle, containing eluent; A high-pressure pump, connected to the eluent bottle, for delivering the eluent into the injection valve; A suppressor liquid conveyor is connected to the suppressor and is used to input suppressor liquid into the suppressor.

6. The continuous flow ion chromatography system according to claim 5, characterized in that: Also includes: workstations, including personal computers; A waste liquid device, connected to the injection valve, the suppressor, the detector, and the flow detection cell, and used for collecting waste liquid; A control device, connected to the peristaltic pump, the ultraviolet digester, the first heating reaction pool, the second heating reaction pool, the flow detection pool, the automatic sampler, the injection valve, the high-pressure pump, the detector, and the workstation by signal; The control device converts the ion component concentration electrical signals output by the flow detection cell and the detector into digital signals and transmits them to the personal computer, and the personal computer performs ion analysis on the transmitted digital signals.

7. The continuous flow ion chromatography system according to claim 4, characterized in that: The dilution and sampling device is also provided with a piston pump, a reagent sprayer and a sample suction needle. The piston pump is used to control the suction and spraying of the phosphorus-containing scale inhibitor solution to be tested, and the reagent sprayer is used to apply the diluent and clean the sample suction needle.

8. The continuous flow ion chromatography system according to claim 4, characterized in that: The dilution and sampling device is also connected to a phosphorus-containing scale inhibitor test solution collection position and a needle washing water injection position through pipelines.

9. The continuous flow ion chromatography system according to claim 5, characterized in that: The eluent in the eluent bottle is a carbonate or bicarbonate type eluent.

10. The continuous flow ion chromatography system according to any one of claims 1 to 9, characterized in that: A quantitative ring is arranged in the injection valve.

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