Automated multi-parameter concentration analysis system and usage method

Abstract

An automated multi-parameter concentration analysis system and a usage method. By means of the optimized design of pipes and a device, the functions of sampling and pipe rinsing, liquid storage tank emptying, and pipe purging are integrated. Specifically, sampling and pipe rinsing makes a sample to be detected for each test the same as liquid in a process pool (1), thereby effectively reducing test errors; during the test process, the liquid storage tank (52) can be emptied as required, liquid for rinsing a pipe is stored in the liquid storage tank (52), and after the test is completed, the liquid is discharged to the original process pool (1), thereby avoiding waste of liquid, and effectively reducing costs; as for pipe purging, after the addition of the sample to be detected is completed, an air pump (42) is turned on to blow the liquid stored in the pipe back to the original process pool (1), thereby not only avoiding waste of liquid, but also reducing cross-contamination caused by sharing a common pipe for the next test.

Description

An automated multi-parameter concentration analysis system and its usage method Technical Field

[0001] This invention relates to the field of hot-dip galvanizing process solution concentration detection technology, and in particular to a multi-parameter automated process solution concentration analysis system and its usage method. Background Technology

[0002] Hot-dip galvanizing is a metal surface treatment method that prevents corrosion by immersing metal in a bath of molten zinc. In the hot-dip galvanizing process, the metal is first cleaned to remove dirt and oxides, and then immersed in molten zinc at approximately 450°C. When the metal is removed from the molten zinc, a protective zinc layer adheres to its surface. This coating prevents corrosion and is an effective method of metal corrosion protection, widely used in various metal products such as steel plates, steel strips, steel pipes, and castings. This method not only provides excellent corrosion resistance but also creates an aesthetically pleasing appearance on the metal surface. Furthermore, hot-dip galvanizing offers good weather resistance and durability, making it suitable for applications in outdoor environments.

[0003] Currently, the number of domestic hot-dip galvanizing production lines is steadily increasing. In traditional hot-dip galvanizing lines, the concentration of acid and ferrous chloride in pickling solutions, as well as the concentration of zinc chloride and ammonium chloride in auxiliary solutions, are generally tested manually. After sampling, the samples are sent to the laboratory, where laboratory personnel test the concentration of each sample, record and summarize the data, and then feed it back to the hot-dip galvanizing operation workshop. The hot-dip galvanizing operation workshop uses the acid and ferrous chloride concentrations obtained from the tests to determine whether the pickling solution in the acid tank meets the production index requirements, and uses the zinc chloride and ammonium chloride concentrations to determine whether the auxiliary solution in the auxiliary solution in the auxiliary solution tank meets the production index requirements. This information is then used to advance the next step of the hot-dip galvanizing process. Whether the concentrations meet the standards has a significant impact on the control of galvanizing quality and cost. Therefore, the timeliness and accuracy of sampling and concentration testing are particularly important.

[0004] Chinese utility model patent CN209086148U discloses an online automatic concentration detection device. This device uses a host computer to send control signals to a syringe pump that sequentially extracts the test sample, indicator, reference solution, and reagents required for titration from the reagent area and injects them into the reaction vessel. While this solution automates the detection process, different reagents share tubing and the syringe pump, making cross-contamination highly likely. Therefore, repeated extraction, emptying, and cleaning of the tubing are necessary before each test, resulting in complex preparation procedures, long test intervals, and significant waste of reagents. Furthermore, the extracted acid evaporates in the open reaction vessel, polluting the working environment. The high-definition camera used to determine the titration endpoint is expensive, highly susceptible to natural light, and requires continuous learning based on RGB and HSV data to determine the endpoint color, leading to inaccurate endpoint determination. Summary of the Invention

[0005] Existing automated concentration detection devices suffer from drawbacks such as long detection cycle intervals, significant waste of drug solution during pipeline and injection pump cleaning, severe evaporation of extracted acid solution, and inaccurate endpoint determination.

[0006] In view of at least one of the above-mentioned technical problems, the present invention provides an automated multi-parameter concentration analysis system and its usage method. Through optimized design of pipelines and devices, the functions of sampling and rinsing pipelines, liquid storage tank emptying, and purging pipelines are integrated, effectively reducing costs. The specific technical solution is as follows:

[0007] An automated multi-parameter concentration analysis system includes: a liquid extraction unit, comprising an extraction pipeline; the extraction pipeline is equipped with a rinsing and purging unit for controlling the extraction pipeline to extract liquid from a process tank and to supply air to purge the liquid in the extraction pipeline to a storage tank; a sample quantitative addition unit for quantitatively extracting liquid from the extraction pipeline and quantitatively adding the sample solution to a sealed magnetic stirring bottle; the bottle body of the sealed magnetic stirring bottle is made of a light-transmitting material; a drug quantitative addition unit, comprising a reagent quantitative addition group and a reference drug addition group; the drug quantitative addition unit is equipped with a water supply unit and an air supply unit for rinsing and purging the liquid in the drug quantitative addition unit pipeline to a storage tank; a photoelectric detection unit, comprising a light wave emitting module and a receiving module respectively disposed on both sides of the sealed magnetic stirring bottle; and a host computer.

[0008] In some embodiments of this disclosure, the extraction pipeline includes several infusion branch pipes connected to multiple process tanks. Each infusion branch pipe is equipped with an electric valve I. All infusion branch pipes converge to an infusion pipe. An electric valve II is installed at the outer end of the infusion pipe. Pipe I is connected to the middle of the infusion pipe. Pipe I is equipped with an electric valve III. The electric valve III is equipped with pipe II. Pipe II is equipped with a pneumatic diaphragm pump. The pneumatic diaphragm pump is equipped with pipe III. The outer end of the infusion pipe is connected to pipe III. Pipe III is connected to an electric valve IV. The electric valve IV is equipped with pipe IV. Pipe IV is connected to a tee connector, which is connected to one of the inlet ports of the tee connector. The air inlet of the pneumatic diaphragm pump is connected to pipe V. Channel V is equipped with solenoid valve I, which is connected to pipe VI. Pipe VI is connected to an air pump, and pipe VI is connected to pipe VII. Pipe VII is connected to electric valve V, and electric valve V is connected to pipe VIII. Pipe VIII is connected to the other inlet of the tee connector. Pipe VIII is connected to pipe IX, which is equipped with electric valve VI. The outer end of pipe IX is connected to the storage tank, which is equipped with pipe X. One end of pipe X is close to the inner bottom of the storage tank, and the other end of pipe X is connected to pipe II. Pipe X is equipped with electric valve VII. The outlet of the tee connector is connected to liquid path I, which is equipped with fluid valve I and is used for the sample liquid quantitative addition section.

[0009] In some embodiments of this disclosure, the storage tank is equipped with a high level gauge and a low level gauge, which are used in conjunction with the host computer.

[0010] In some embodiments of this disclosure, the tee is a vertical T-shaped tee with two liquid inlets located at the top and bottom, each equipped with a pressure sensing component.

[0011] In some embodiments of this disclosure, the sample liquid quantitative dosing unit includes a four-way connector, one of which is connected to the liquid path I, and the other three of which are respectively equipped with liquid path II, liquid path III and liquid path IV. Liquid path II is equipped with a fluid valve II, and the outer end of liquid path II is connected to the sealed magnetic stirring bottle. Liquid path III is connected to the injection pump I, liquid path IV is equipped with a fluid valve III, and liquid path IV is connected to a sample delivery bottle.

[0012] In some embodiments of this disclosure, the sealed magnetic stirring bottle has a quartz bottle with a light transmittance of over 90%, a bottle cap connected to the bottle mouth by a thread, a connecting pipe hole on the bottle cap, a sealing element provided in the connecting pipe hole, and a magnetic stirring assembly provided at the bottom of the quartz bottle.

[0013] In some embodiments of this disclosure, the drug solution metering unit includes several reference drug solution tubes disposed in the sealed magnetic stirring bottle, the reference drug solution tubes being connected to a multi-way valve I, and the multi-way valve I being connected to a reference drug solution container and an injection pump II.

[0014] In some embodiments of this disclosure, the reference drug solution container includes a sodium hydroxide bottle, a potassium dichromate bottle, and an EDTA bottle.

[0015] In some embodiments of this disclosure, the sealed magnetic stirring flask is equipped with a titration reaction tube, the titration reaction tube is connected to a multi-way valve II, the multi-way valve II is connected to a reaction main pipe and an injection pump III, the reaction main pipe is connected to multiple reaction branch pipes, each of the reaction branch pipes is separately equipped with a fluid valve IV, wherein two reaction branch pipes are respectively connected to water and air, and the outer ends of the other reaction branch pipes are separately connected to a solvent bottle.

[0016] In some embodiments of this disclosure, the reaction branch pipe for receiving water is equipped with a water tank, and the inner cavity of the water tank is equipped with a low water level gauge; the reaction branch pipe for receiving air is equipped with an air filter; the reaction branch pipes for receiving water and air are connected to the tail end of the main reaction pipe.

[0017] In some embodiments of this disclosure, the solvent bottles include bromocresol green agent bottles, sodium diphenylamine sulfonate agent bottles, sulfur-phosphorus mixed acid agent bottles, chrome black T agent bottles, buffer solution bottles, bromothymol blue agent bottles, and formaldehyde agent bottles.

[0018] In some embodiments of this disclosure, the sealed magnetic stirring bottle is equipped with a connecting pipe and a drain pipe that connect to the liquid storage tank. The inner end of the connecting pipe is located in the upper part of the inner cavity of the sealed magnetic stirring bottle, and the inner end of the drain pipe is located in the lower part of the inner cavity of the sealed magnetic stirring bottle. The drain pipe is equipped with a drain pump.

[0019] In some embodiments of this disclosure, the drain pump is a diaphragm pump or a peristaltic pump.

[0020] A method for using an automated multi-parameter concentration analysis system, comprising the following specific steps:

[0021] Sample delivery; taking samples from the process tank and transferring them to sample bottles;

[0022] Take a sample and rinse; open fluid valve III and close fluid valve I and fluid valve II; use syringe pump I to take 10-25 ml of the sample solution to be tested from the sample delivery bottle, open fluid valve II, and add the sample to be tested into the sealed magnetic stirring bottle through syringe pump I. Repeat the sampling 2-5 times. Leave 1-5 ml in syringe pump I for the last time, and turn on the drain pump to drain the liquid in the sealed magnetic stirring bottle into the storage tank.

[0023] Clean the sealed magnetic stirring bottle; open the fluid valve IV of the reaction pipe that receives water, and close the other fluid valves IV; draw 40-100 ml of water through the syringe pump III, and add the water to the sealed magnetic stirring bottle through the multi-port valve II; after magnetic stirring, turn on the drain pump to drain the liquid in the sealed magnetic stirring bottle into the storage tank, and repeat 2-5 times;

[0024] Add the sample to be tested; syringe pump I adds the remaining sample to the sealed magnetic stirring bottle;

[0025] Add reagents; draw reagents from the solvent bottle using syringe pump III and add them to the sealed magnetically stirred bottle, then stir magnetically;

[0026] Add water; open the fluid valve IV of the reaction pipe that receives water, and close the other fluid valves IV; use syringe pump III to draw 20-80 ml of water and add it to a sealed magnetic stirring bottle;

[0027] Empty the common pipeline; open the fluid valve IV of the reaction branch pipe connected to air, and use the syringe pump III to draw 2-20 ml of air to discharge the residual drug solution in the pipeline into the sealed magnetic stirring bottle;

[0028] Add the reference drug solution; activate the photoelectric detection unit, and use the syringe pump II to draw the reference drug solution from the reference drug solution container and add it drop by drop into the sealed magnetic stirring bottle;

[0029] Photoelectric detection unit data transmission; the light wave emitting module emits a light beam that passes through the sealed magnetic stirring bottle, the receiving module converts the light signal into a voltage value and transmits the collected data to the host computer. When the color of the solution in the sealed magnetic stirring bottle changes abruptly, the voltage value is determined to have reached the target range as the titration endpoint, and the syringe pump II is controlled to stop adding the reference solution. At the same time, the syringe pump II transmits the amount of added reference solution to the host computer.

[0030] The calculation shows that the host computer calculates and displays the concentration of the test solution based on the amount of the test solution added, the amount of the reference solution used, and the density.

[0031] Empty the sealed magnetic stirring bottle; turn on the drain pump to drain the liquid in the sealed magnetic stirring bottle into the storage tank;

[0032] Clean the pipes.

[0033] Compared with existing technologies, the above-mentioned automated multi-parameter concentration analysis system and its usage method have the following advantages:

[0034] Through optimized design of pipelines and devices, the functions of sampling and rinsing pipelines, liquid storage tank emptying, and purging pipelines are integrated: the sampling and rinsing pipeline ensures that the sample to be tested each time is the same as the liquid in the process tank, effectively reducing testing errors. The liquid storage tank can be emptied as needed during the testing process. The rinsing pipeline liquid is stored in the storage tank and discharged to the original process tank after the test, without wasting liquid and effectively reducing costs; the purging pipeline, after the sample to be tested is added, turns on the air pump to blow the liquid stored in the pipeline back to the original process tank, without wasting liquid and reducing cross-contamination caused by sharing the common pipe for the next test.

[0035] Each reference solution requiring accurate titration uses a separate syringe pump to ensure constant concentration, prevent cross-contamination, and ensure precise titration. Multiple reagents with known dosages share a syringe pump via a multi-port valve. By optimizing the order of addition—adding reagents first, then water—it is possible to dilute the reagents to facilitate the reaction, clean the syringe pump and common tubing, and finally purge the pure water with air to avoid cross-contamination. This reduces the use of pumps, saves space, and reduces costs.

[0036] The sealed magnetic stirring bottle adopts a sealed design to prevent the extraction of acid from evaporating and corroding the equipment; it can also prevent liquid from overflowing due to pump, valve, or program malfunctions, as the liquid may be a strong acid or strong alkali that could corrode the equipment; in this technical solution, the liquid overflowing from the sealed magnetic stirring bottle can enter the storage tank through a connecting pipe.

[0037] The photoelectric detection unit is used to determine the reaction endpoint, which is accurate and has a long service life.

[0038] The sampling, detection, and data processing processes are controlled by the host computer software without manual intervention. It can achieve fully automated concentration detection, including automatic sampling, automatic rinsing, automatic detection, automatic calculation, automatic cleaning, automatic drainage, and automatic air blowing. This system can continuously monitor the concentration of target chemical substances in the process tank and display the results in real time, ensuring the stability of the industrial production process and product quality, and improving the automation level of the production line. Attached Figure Description

[0039] Figure 1 is a schematic diagram of the process of the automated multi-parameter concentration analysis system of the present invention;

[0040] Figure 2 is a partially enlarged schematic diagram of part A in Figure 1;

[0041] Figure 3 is a magnified view of part B in Figure 1;

[0042] Figure 4 is a magnified view of part C in Figure 1;

[0043] Figure 5 is a magnified view of part D in Figure 1;

[0044] The following are the labeling instructions in the diagram: 1. Process tank; 11. Infusion branch pipe; 12. Infusion pipe; 21. Electric valve I; 22. Electric valve II; 23. Electric valve III; 24. Electric valve IV; 25. Electric valve V; 26. Electric valve VI; 27. Electric valve VII; 28. Solenoid valve I; 301. Pipe I; 302. Pipe II; 303. Pipe III; 304. Pipe IV; 305. Pipe V; 306. Pipe VI; 307. Pipe VII; 308. Pipe VIII; 309. Pipe IX; 310. Pipe X; 41. Pneumatic diaphragm pump; 42. Air pump; 51. T-joint; 52. Storage tank; 521. High level gauge; 522. Low level gauge; 53. Pressure sensing component; 531. Electric valve VIII; 532. Pressure sensor; 61. Fluid Circuit I; 611. Fluid Valve I; 62. Four-way Connector; 63. Fluid Valve II; 64. Injection Pump I; 651. Fluid Valve III; 652. Sample Bottle; 7. Sealed Magnetic Stirring Bottle; 71. Connecting Pipe; 72. Drain Pipe; 721. Drain Pump; 8. Host Computer; 91. Standard Drug Solution Pipe; 911. Multi-port Valve I; 912. Standard Drug Solution Container; 9121. Sodium Hydroxide Bottle; 9122. Potassium Dichromate Bottle; 9123. EDTA Bottle; 913. Injection Pump II; 92. Titration Reaction Tube; 921. Multi-port Valve II; 93. Main Reaction Tube; 931. Sub-reaction Tube; 9311. Fluid Valve IV; 9312. Solvent Bottle; 9313. Low Water Level Gauge; 9314. Air Filter; 94. Injection Pump III. Detailed Implementation

[0045] To better understand the purpose, structure, and function of this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below. The component numbers used herein are merely for distinguishing the described objects and have no sequential or technical meaning.

[0046] As shown in Figures 1 to 5 of the attached drawings, this embodiment provides an automated multi-parameter concentration analysis system, including: a liquid collection unit, as shown in Figure 2, which is a suction pipe used in conjunction with the hot-dip galvanizing process tank 1. The suction pipe is used to collect the sample liquid to be tested from the process tank 1. The suction pipe is equipped with a rinsing and evacuation unit, which is used to control the suction pipe to collect liquid from the process tank 1 and to supply air to evacuate the liquid in the suction pipe to a storage tank 52, which is made of corrosion-resistant material; and a sample liquid quantitative addition unit, as shown in Figure 3, which is used to quantitatively collect liquid from the suction pipe and quantitatively add the sample liquid to a sealed magnetic stirring bottle 7. The bottle body of the sealed magnetic stirring bottle 7 is made of light-transmitting corrosion-resistant material. The quantitative drug dosing unit, as shown in Figure 4, includes a reagent quantitative dosing group and a reference drug dosing group. The quantitative drug dosing unit is equipped with a water supply unit and an air supply unit for cleaning and draining the liquid from the quantitative drug dosing unit pipeline to the storage tank 52. The photoelectric detection unit includes a light wave emitting module and a receiving module located on both sides of the sealed magnetic stirring bottle 7. A host computer 8 is used to realize automated data analysis and automated component control. The host computer 8 is a computer or microcontroller used to send operation commands and perform data analysis. It can provide a user interface and display feedback data to the user. In this embodiment, the host computer 8 can be a computer, mobile phone, tablet, panel, or smart touchscreen.

[0047] As shown in Figure 2, this embodiment is used for several process tanks 1. Each process tank 1 is equipped with an independently operated infusion branch pipe 11. Each infusion branch pipe 11 is equipped with an independent electric valve I 21. All infusion branch pipes 11 are connected to an infusion pipe 12. An electric valve II 22 is installed at the outer end of the infusion pipe 12. A pipe I 301 is connected to the middle of the infusion pipe 12. An electric valve III 23 is connected to the pipe I 301. The electric valve III 23 is connected to the pipe II 302. A pneumatic diaphragm pump 41 is connected to the pipe II 302. The pneumatic diaphragm pump 41 is connected to... There is a pipe Ⅲ303, and the outer end of the infusion tube 12 is connected to the pipe Ⅲ303. The pipe Ⅲ303 is connected to an electric valve Ⅳ24, and the electric valve Ⅳ24 is connected to a pipe Ⅳ304. The pipe Ⅳ304 is connected to a T-shaped tee connector 51. The tee connector 51 is vertically positioned with two inlets located at the top and bottom, respectively. The pipe Ⅳ304 is connected to one of the inlets of the tee connector 51. The air inlet of the pneumatic diaphragm pump 41 is connected to pipe Ⅴ305, and pipe Ⅴ305 is connected to a solenoid valve Ⅰ28. The solenoid valve I28 is connected to pipe VI306, which is connected to an air pump 42. Pipe VI306 is connected to pipe VII307, which is connected to an electric valve V25. The electric valve V25 is connected to pipe VIII308, which is connected to another inlet of the tee connector 51. Pipe VIII308 is connected to pipe IX309, which is equipped with an electric valve VI26. A liquid storage tank 52 is connected to the outer end of pipe IX309, and the liquid storage tank 52 is equipped with pipe X310. One end of pipe X310 is close to the inner bottom of the liquid storage tank 52, and the other end of pipe X310 is connected to pipe II 302. Pipe X310 is equipped with electric valve VII 27. The tank cavity of the liquid storage tank 52 is equipped with a high level gauge 521 and a low level gauge 522. Each of the two liquid inlets of the three-way connector 51 is equipped with a pressure sensing component 53. The pressure sensing component 53 includes an electric valve VIII 531 and a pressure sensor 532. The opening and closing of the electric valve VIII 531 enables the pressure sensor 532 to receive changes in the pressure in the pipeline.The outlet of the three-way connector 51 connects to liquid path I 61. Liquid path I 61 is equipped with fluid valve I 611. Liquid path I 61 is connected to a four-way connector 62. The other three connectors of the four-way connector 62 are respectively equipped with liquid path II, liquid path III, and liquid path IV. Liquid path II is equipped with fluid valve II 63. The outer end of liquid path II is connected to a sealed magnetic stirring bottle 7. In this embodiment, the bottle body of the sealed magnetic stirring bottle 7 is a quartz bottle with a light transmittance of over 90%. In this embodiment, the bottle mouth is connected to a polytetrafluoroethylene cap by threads. The system includes a connecting port equipped with a sealing element. In this embodiment, the connecting port can be a threaded hole, with a silicone sealing ring installed inside to achieve a sealing effect by compressing the gaps. A magnetic stirrer is placed below the sealed magnetic stirring flask 7, and a rotor is placed inside the sealed magnetic stirring flask 7 to stir and accelerate the reaction during titration. Liquid path III is connected to an injection pump I 64, liquid path IV is equipped with a fluid valve III 651, and liquid path IV is connected to a sample delivery bottle 652. The sealed magnetic stirring flask 7 is equipped with a photoelectric detection unit. The electrical detection unit includes a transmitting unit and a receiving unit respectively located on both sides of the sealed magnetically stirred flask 7. The transmitting unit irradiates the solution inside the magnetically stirred flask with light of a fixed wavelength between 300 and 1000 nm. Part of the light is absorbed by the solution, part is reflected by the interface, and the rest passes through the magnetically stirred flask and the solution. The receiving unit converts the intensity of the light transmitted through the magnetically stirred flask and the solution into an electrical signal for display. Different solution colors absorb the fixed wavelength light differently. When the solution color changes, the electrical signal changes accordingly. The point of abrupt change in the electrical signal is the end of the titration. When in use, the photoelectric detection unit is activated, and light of a fixed wavelength passes through the reaction solution to the photoelectric element. The initial solution is yellow, and the output voltage of the photoelectric element is 4.0–5.0V. At the titration endpoint, the solution is blue-green, and the output voltage of the photoelectric element is 0.0–1.0V. As sodium hydroxide standard solution is added, the output voltage fluctuates continuously. When the output voltage is less than 1.0V, it is determined to be the titration endpoint. The emitting unit is a laser or LED light source with a wavelength of 300–1000nm, which is low in cost and has a long service life, typically greater than 10,000 hours.The receiving unit is an optical semiconductor or various types of optoelectronic components. In this embodiment, it can be a photomultiplier tube. The light beam emitted by the light source passes through a quartz bottle with a transmittance of over 90% and the liquid inside the quartz bottle to the receiving module. The receiving module converts the transmitted light into an electrical signal. Different colors of the liquid in the quartz bottle absorb light of the same wavelength differently, resulting in different transmitted light intensities and different electrical signals. At the titration endpoint, the color of the reaction liquid changes, and the received electrical signal changes accordingly. This disclosure uses a high-precision optoelectronic detection unit and sampling system, which can provide accurate concentration detection data with a detection error of ±1%. The optoelectronic detection unit is equipped with a host computer 8, and the host computer software controls the sampling, detection, and data processing processes without manual intervention, enabling automatic sampling and automatic rinsing. This system features fully automated concentration detection, including automatic detection, calculation, cleaning, drainage, and air blowing. It continuously monitors the concentration of target chemicals in the process tank and displays the results in real time, ensuring the stability of the industrial production process and product quality, and improving the automation level of the production line. The sealed magnetic stirring bottle 7 is equipped with a connecting pipe 71 and a drain pipe 72 that connect to the storage tank 52. The connecting pipe 71 can be a flexible hose. When the sealed magnetic stirring bottle 7 is full, the liquid can enter the storage tank 52 through the connecting pipe 71, preventing liquid overflow and corrosion of equipment. It also enables the internal pressure relief function of the sealed magnetic stirring bottle 7, preventing the liquid from being unable to enter the sealed magnetic stirring bottle 7 due to air pressure issues. In this embodiment, the bottle cap... Except for the drain tube 72, which needs to extend to the bottom of the sealed magnetic stirring bottle 7, the inner ends of all other reagent tubes are located 2-5 mm below the cap. The inner end of the connecting tube 71 is located in the upper part of the inner cavity of the sealed magnetic stirring bottle 7, and the inner end of the drain tube 72 is located in the lower part of the inner cavity of the sealed magnetic stirring bottle 7. The drain tube 72 is equipped with a drain pump 721, which can be a diaphragm pump or a peristaltic pump; in this embodiment, a diaphragm pump is used. The sealed magnetic stirring bottle 7 is equipped with several reference drug solution tubes 91. Each reference drug solution tube 91 is connected to a multi-way valve I 911. The multi-way valve I 911 is connected to a reference drug solution container 912 and an injection pump II 913. Each reference drug solution container 912 includes a sodium hydroxide bottle 912. 121. Potassium dichromate bottle 9122 and EDTA bottle 9123, when in use, the reference solution container 912 is respectively filled with the solution; the sealed magnetic stirring bottle 7 is equipped with a titration reaction tube 92, the titration reaction tube 92 is connected to a multi-way valve II 921, the multi-way valve II 921 is connected to a reaction main pipe 93 and an injection pump III 94, the reaction main pipe 93 is connected to multiple reaction branch pipes 931, each of the reaction branch pipes 931 is individually equipped with a fluid valve IV 9311, wherein two reaction branch pipes 931 are respectively connected to water and air. It can be optimized that the reaction branch pipe 931 connected to water is equipped with a water bucket, the water is placed in the inner cavity of the water bucket, and the inner cavity of the water bucket is equipped with a low water level gauge 9313, which can be used for water replenishment indication;The reaction branch pipe 931 connected to air is equipped with an air filter 9314. The outer ends of other reaction branch pipes 931 are individually connected to solvent bottles 9312. In this embodiment, the solvent bottles 9312 include bromocresol green agent bottles, sodium diphenylamine sulfonate agent bottles, sulfur-phosphorus mixed acid agent bottles, chrome black T agent bottles, buffer solution bottles, bromothymol blue agent bottles, and formaldehyde agent bottles. The reaction branch pipes 931 connected to water and air are connected to the tail end of the reaction main pipe 93. The purpose is to clean the common pipe with pure water and to vent the air from the common pipe. Preferably, the bromocresol green agent bottle and the sodium diphenylamine sulfonate agent bottle are paired and placed on the left and right sides of the reaction main pipe 93; the sulfur-phosphorus mixed acid agent bottle and the chrome black T agent bottle are paired and placed on the left and right sides of the reaction main pipe 93; and the buffer solution bottle and the bromothymol blue agent bottle are paired and placed on the left and right sides of the reaction main pipe 93. Through optimized design of pipelines and devices, the functions of sampling and rinsing pipelines, emptying storage tank 52, and purging pipelines are integrated: The sampling and rinsing pipeline ensures that the sample to be tested is identical to the liquid in the process tank for each test, effectively reducing testing errors. During the testing process, storage tank 52 can be emptied as needed, with the rinsing liquid stored in storage tank 52. After testing, it is discharged back to the original process tank, preventing liquid waste and effectively reducing costs. The purging pipeline, after the sample is added, uses an air pump to blow the liquid stored in the pipeline back to the original process tank, preventing liquid waste and reducing cross-contamination from sharing a common pipeline for subsequent tests.

[0048] In this embodiment, all syringe pumps, including syringe pump I 64, syringe pump II 913, and syringe pump III 94, are industrial syringe pumps with a precision of 2 μl. They are automated and controlled by the host computer 8, and are resistant to acid and alkali corrosion. Each of the three unknown amounts of standard solutions requiring accurate titration uses a separate syringe pump to ensure constant concentration, prevent cross-contamination, and ensure precise titration. For reagents with known dosage amounts, a multi-port valve is used to share a syringe pump. By optimizing the addition order, reagents are added first, followed by pure water. The pure water dilutes the reagents, which is beneficial for the reaction, and also cleans the syringe pump and common pipeline. Finally, the pure water is purged with air. To avoid cross-contamination of reagents; to reduce the use of pumps, reduce space occupation, and save costs; in this embodiment, all electric valves, including electric valve I21, electric valve II22, electric valve III23, electric valve IV24, electric valve V25, electric valve VI26 and electric valve VII27, can be electric ball valves, and automation is controlled by the host computer 8; in this embodiment, all reference solution containers 912 and solvent bottles 9312 are equipped with one-way valves on their caps, allowing air to enter the reagent bottles from the outside, preventing negative pressure from being generated in the reagent bottles, while ensuring that the volatile gases inside the reagent bottles do not overflow.

[0049] This embodiment also discloses a method for using an automated multi-parameter concentration analysis system, applicable to the automated multi-parameter concentration analysis system disclosed herein, the steps of which include:

[0050] Sample delivery: Take a sample from process tank 1 and transfer it to sample bottle 652;

[0051] Take a sample and rinse; open fluid valve Ⅲ651 and close fluid valve Ⅰ611 and fluid valve Ⅱ63; use syringe pump Ⅰ64 to take 10-25 ml of the sample to be tested from the sample delivery bottle 652, open fluid valve Ⅱ63, and add the sample to be tested into the sealed magnetic stirring bottle 7 through syringe pump Ⅰ64. Repeat the sampling 2-5 times. Leave 1-5 ml in syringe pump Ⅰ64 on the last time. Turn on the drain pump 721 to drain the liquid in the sealed magnetic stirring bottle 7 into the storage tank 52.

[0052] Clean the sealed magnetic stirring bottle 7; open the fluid valve IV 9311 of the reaction pipe 931 that receives water, and close the other fluid valves IV 9311; draw 40-100 ml of water through the injection pump III 94, and add the water to the sealed magnetic stirring bottle 7 through the multi-way valve II 921; after magnetic stirring, turn on the drain pump 721 to drain the liquid in the sealed magnetic stirring bottle 7 into the storage tank 52, and repeat 2-5 times;

[0053] Add the sample to be tested; syringe pump I64 adds the remaining sample to the sealed magnetic stirring bottle 7;

[0054] Add reagents; draw reagents from solvent bottle 9312 using syringe pump Ⅲ94 and add them to the sealed magnetic stirring bottle 7, then stir magnetically;

[0055] Add water; open the fluid valve IV 9311 of the reaction pipe 931 that receives water, and close the other fluid valves IV 9311; draw 20-80 ml of water through the syringe pump III 94 and add it to the sealed magnetic stirring bottle 7;

[0056] Empty the public pipeline; open the fluid valve Ⅳ9311 of the air-connected reaction pipe 931, and use the syringe pump Ⅲ94 to extract 2-20 ml of air to discharge the residual drug solution in the pipeline into the sealed magnetic stirring bottle 7;

[0057] Add the reference drug solution; activate the photoelectric detection unit, and use the syringe pump II 913 to draw the reference drug solution from the reference drug solution container 912 and add it drop by drop into the sealed magnetic stirring bottle 7;

[0058] Photoelectric detection unit data transmission; the light wave emitting module emits a light beam that passes through the sealed magnetic stirring bottle 7, the receiving module converts the light signal into a voltage value, and transmits the collected data to the host computer 8. When the color of the solution in the sealed magnetic stirring bottle 7 changes abruptly, the voltage value is determined to have reached the target range as the titration endpoint, and the syringe pump II 913 is controlled to stop adding the reference solution. At the same time, the syringe pump II 913 transmits the amount of added reference solution to the host computer 8.

[0059] The calculation and display show that the host computer 8 calculates and displays the concentration of the test solution based on the amount of the test solution added, the amount of the reference solution used, and the density.

[0060] Empty the sealed magnetic stirring bottle 7; turn on the drain pump 721 to drain the liquid in the sealed magnetic stirring bottle 7 into the storage tank 52;

[0061] Clean the pipeline to complete this inspection cycle.

[0062] Method 1: Measuring acid concentration; This method can be performed as follows:

[0063] S1, Sample delivery; turn on air pump 42, turn on electric valve I 21 corresponding to process tank 1 where concentration detection is required; turn on electric valve III 23, electric valve IV 24, and electric valve VI 26; turn on solenoid valve I 28; start pneumatic diaphragm pump 41 to transport the liquid to be tested in process tank 1 to storage tank 52 and rinse the pipeline along the way; when the liquid in storage tank 52 triggers high level gauge 521, turn off solenoid valve I 28, electric valve III 23, and electric valve IV 24.

[0064] S2, Measure density as needed; Activate the pressure sensing component 53, and measure the pressure difference ΔP between the two ends of the three-way connector 51. The height difference Δh between the upper and lower inlets of the three-way connector 51 is known, and g is the gravitational acceleration constant of 9.8 m / s². 2 According to the liquid pressure formula P=ρgh, the liquid density of the process tank is calculated as ρ=ΔP / gΔh, and the pressure sensing component 53 is turned off.

[0065] S3, sampling and rinsing; open fluid valve I 611, close fluid valve II 63 and fluid valve III 651, and use syringe pump I 64 to take 10-25 ml of the sample to be tested. Close fluid valve I 611, open fluid valve II 63, and add the sample to be tested into the sealed magnetic stirring bottle 7 through syringe pump I 64. Repeat 2-5 times. On the last time, syringe pump I 64 is not emptied, leaving 1-5 ml in syringe pump I 64. Turn on the drain pump 721 to drain the liquid in the sealed magnetic stirring bottle 7 into the storage tank 52.

[0066] S4, clean the sealed magnetic stirring bottle 7; open the fluid valve IV 9311 of the reaction pipe 931 that receives water, and close the other fluid valves IV 9311; draw 40-100 ml of water through the injection pump III 94, add the water to the sealed magnetic stirring bottle 7 through the multi-way valve II 921, and after magnetic stirring, turn on the drain pump 721 to drain the liquid in the sealed magnetic stirring bottle 7 into the storage tank 52, repeat 2-5 times;

[0067] S5, inject the remaining sample into the sealed magnetic stirring bottle 7 using syringe pump I64;

[0068] S6, Add reagent; Draw 0.3-3 ml of bromocresol green indicator through syringe pump III94 and add it to the sealed magnetic stirring bottle 7, and stir magnetically;

[0069] S7, add water; open the fluid valve Ⅳ9311 of the reaction pipe 931 that receives water, and close the other fluid valves Ⅳ9311; draw 20-80 ml of water through the syringe pump Ⅲ94 and add it to the sealed magnetic stirring bottle 7;

[0070] S8, vent the common pipeline; open the fluid valve Ⅳ9311 of the air-connected reaction pipe 931, and use the injection pump Ⅲ94 to extract 2-20ml of air to discharge the residual drug solution in the pipeline into the sealed magnetic stirring bottle 7;

[0071] S9, add reference solution; start the photoelectric detection unit, and use the injection pump II913 to draw sodium hydroxide reference solution drop by drop into the sealed magnetic stirring bottle 7;

[0072] S10, Photoelectric detection unit data transmission; The photoelectric detection unit converts the color of the solution in the sealed magnetic stirring bottle 7 into a voltage value and transmits the collected data to the host computer 8 in real time. When the color of the solution in the sealed magnetic stirring bottle 7 changes abruptly, the voltage value is determined to reach a certain range as the titration endpoint, and the syringe pump II 913 is controlled to stop adding the reference solution. At the same time, the syringe pump II 913 transmits the amount of added reference solution to the host computer 8.

[0073] S11, Calculation and display; The host computer 8 calculates and displays the concentration (%) of the test liquid based on the amount of the test liquid added, the amount of the reference solution used, and the density;

[0074] S12, empty the sealed magnetic stirring bottle 7; turn on the drain pump 721 to drain the liquid in the sealed magnetic stirring bottle 7 into the storage tank 52;

[0075] S13, empty the storage tank 52; open electric valve VII27, electric valve II22, solenoid valve I28, start the pneumatic diaphragm pump 41, and discharge the liquid in the storage tank 52 to the corresponding reaction tank 1. When the liquid level in the storage tank 52 is low, close solenoid valve I28 and electric valve VII27.

[0076] S14, purge the pipeline; close electric valve VI26, open electric valves IV24, V25, and II22 to purge the liquid stored in the pipeline back to the original reaction tank 1. After 10-20 minutes, close electric valves I21, IV24, V25, and II22; the next testing cycle can be prepared.

[0077] Method 2: Measuring ferrous chloride concentration. This method can be performed as follows:

[0078] S1, Sample delivery; turn on air pump 42, turn on electric valve I 21 corresponding to process tank 1 where concentration detection is required; turn on electric valve III 23, electric valve IV 24, and electric valve VI 26; turn on solenoid valve I 28; start pneumatic diaphragm pump 41 to transport the liquid to be tested in process tank 1 to storage tank 52 and rinse the pipeline along the way; when the liquid in storage tank 52 triggers high level gauge 521, turn off solenoid valve I 28, electric valve III 23, and electric valve IV 24.

[0079] S2, sample and rinse; open fluid valve I 611, close fluid valve II 63 and fluid valve III 651, and use syringe pump I 64 to take 10-25 ml of the sample to be tested. Close fluid valve I 611, open fluid valve II 63, and add the sample to be tested into the sealed magnetic stirring bottle 7 through syringe pump I 64. Repeat 2-5 times. Turn on the drain pump 721 to drain the liquid in the sealed magnetic stirring bottle 7 into the storage tank 52.

[0080] S3, clean the sealed magnetic stirring bottle 7; open the fluid valve IV 9311 of the reaction pipe 931 that receives water, and close the other fluid valves IV 9311; draw 40-100 ml of water through the injection pump III 94, add the water to the sealed magnetic stirring bottle 7 through the multi-way valve II 921, and after magnetic stirring, turn on the drain pump 721 to drain the liquid in the sealed magnetic stirring bottle 7 into the storage tank 52, repeat 2-5 times;

[0081] S4, inject the remaining sample into the sealed magnetic stirring bottle 7 using syringe pump I64;

[0082] S5, Add reagents; Draw 5-30 ml of thiophosphoric acid mixture into the sealed magnetic stirring bottle 7 using syringe pump III94; Draw 0.3-3 ml of sodium diphenylamine sulfonate into the sealed magnetic stirring bottle 7 using syringe pump III94; Stir magnetically;

[0083] S6, add water; open the fluid valve Ⅳ9311 of the reaction pipe 931 that receives water, and close the other fluid valves Ⅳ9311; draw 20-80 ml of water through the syringe pump Ⅲ94 and add it to the sealed magnetic stirring bottle 7;

[0084] S7, vent the common pipeline; open the fluid valve Ⅳ9311 of the air-connected reaction pipe 931, and use the injection pump Ⅲ94 to extract 2-20ml of air to discharge the residual drug solution in the pipeline into the sealed magnetic stirring bottle 7;

[0085] S8, add reference solution; start the photoelectric detection unit, and use the injection pump II913 to draw potassium dichromate reference solution drop by drop into the sealed magnetic stirring bottle 7;

[0086] S9, Photoelectric detection unit data transmission; The photoelectric detection unit converts the color of the solution in the sealed magnetic stirring bottle 7 into a voltage value and transmits the collected data to the host computer 8 in real time. When the color of the solution in the sealed magnetic stirring bottle 7 changes abruptly, the voltage value is determined to reach a certain range as the titration endpoint, and the syringe pump II 913 is controlled to stop adding the reference solution. At the same time, the syringe pump II 913 transmits the amount of added reference solution to the host computer 8.

[0087] S10, Calculation and display; The host computer 8 calculates the concentration (g / L) of the test solution based on the amount of the test solution added and the amount of the reference solution used, and displays it.

[0088] S11, empty the sealed magnetic stirring bottle 7; turn on the drain pump 721 to drain the liquid in the sealed magnetic stirring bottle 7 into the storage tank 52;

[0089] S12, empty the storage tank 52; open electric valve VII27, electric valve II22, solenoid valve I28, and start the pneumatic diaphragm pump 41 to discharge the liquid in the storage tank 52 to the corresponding reaction tank 1. When the liquid level in the storage tank 52 is low, close solenoid valve I28 and electric valve VII27.

[0090] S13, purge the pipeline; close electric valve VI26, open electric valves IV24, V25, and II22 to purge the liquid stored in the pipeline back to the original reaction tank 1. After 10-20 minutes, close electric valves I21, IV24, V25, and II22; the next testing cycle can be prepared.

[0091] Method 3: Measure the zinc chloride concentration. This method can be performed as follows:

[0092] S1, Sample delivery; turn on air pump 42, turn on electric valve I 21 corresponding to process tank 1 where concentration detection is required; turn on electric valve III 23, electric valve IV 24, and electric valve VI 26; turn on solenoid valve I 28; start pneumatic diaphragm pump 41 to transport the liquid to be tested in process tank 1 to storage tank 52 and rinse the pipeline along the way; when the liquid in storage tank 52 triggers high level gauge 521, turn off solenoid valve I 28, electric valve III 23, and electric valve IV 24.

[0093] S2, sample and rinse; open fluid valve I 611, close fluid valve II 63 and fluid valve III 651, and use syringe pump I 64 to take 10-25 ml of the sample to be tested. Close fluid valve I 611, open fluid valve II 63, and add the sample to be tested into the sealed magnetic stirring bottle 7 through syringe pump I 64. Repeat 2-5 times. On the last time, syringe pump I 64 is not emptied, leaving 1-5 ml in syringe pump I 64. Turn on the drain pump 721 to drain the liquid in the sealed magnetic stirring bottle 7 into the storage tank 52.

[0094] S3, clean the sealed magnetic stirring bottle 7; open the fluid valve IV 9311 of the reaction pipe 931 that receives water, and close the other fluid valves IV 9311; draw 40-100 ml of water through the injection pump III 94, add the water to the sealed magnetic stirring bottle 7 through the multi-way valve II 921, and after magnetic stirring, turn on the drain pump 721 to drain the liquid in the sealed magnetic stirring bottle 7 into the storage tank 52, repeat 2-5 times;

[0095] S4, inject the remaining sample into the sealed magnetic stirring bottle 7 using syringe pump I64;

[0096] S5, Add reagents; Draw 5-30 ml of buffer solution using syringe pump III94 and add it to the sealed magnetic stirring bottle 7; Draw 0.3-3 ml of Chrome Black T using syringe pump III94 and add it to the sealed magnetic stirring bottle 7; Stir magnetically;

[0097] S6, add water; open the fluid valve Ⅳ9311 of the reaction pipe 931 that receives water, and close the other fluid valves Ⅳ9311; draw 20-80 ml of water through the syringe pump Ⅲ94 and add it to the sealed magnetic stirring bottle 7;

[0098] S7, vent the common pipeline; open the fluid valve Ⅳ9311 of the air-connected reaction pipe 931, and use the injection pump Ⅲ94 to extract 2-20ml of air to discharge the residual drug solution in the pipeline into the sealed magnetic stirring bottle 7;

[0099] S8, add reference solution; start the photoelectric detection unit, and use the syringe pump II913 to draw EDTA reference solution drop by drop into the sealed magnetic stirring bottle 7;

[0100] S9, Photoelectric detection unit data transmission; The photoelectric detection unit converts the color of the solution in the sealed magnetic stirring bottle 7 into a voltage value and transmits the collected data to the host computer 8 in real time. When the color of the solution in the sealed magnetic stirring bottle 7 changes abruptly, the voltage value is determined to reach a certain range as the titration endpoint, and the syringe pump II 913 is controlled to stop adding the reference solution. At the same time, the syringe pump II 913 transmits the amount of added reference solution to the host computer 8.

[0101] S10, Calculation and display; The host computer 8 calculates the concentration of the test liquid (g / L) based on the amount of test liquid added and the amount of reference solution used, and displays the concentration of the test liquid;

[0102] S11, empty the sealed magnetic stirring bottle 7; turn on the drain pump 721 to drain the liquid in the sealed magnetic stirring bottle 7 into the storage tank 52;

[0103] S12, empty the storage tank 52; open electric valve VII27, electric valve II22, solenoid valve I28, and start the pneumatic diaphragm pump 41 to discharge the liquid in the storage tank 52 to the corresponding reaction tank 1. When the liquid level in the storage tank 52 is low, close solenoid valve I28 and electric valve VII27.

[0104] S13, purge the pipeline; close electric valve VI26, open electric valves IV24, V25, and II22 to purge the liquid stored in the pipeline back to the original reaction tank 1. After 10-20 minutes, close electric valves I21, IV24, V25, and II22; the next testing cycle can be prepared.

[0105] Method 4: When measuring ammonium chloride concentration, this method can be performed according to the following steps:

[0106] S1, Sample delivery; turn on air pump 42, turn on electric valve I 21 corresponding to process tank 1 where concentration detection is required; turn on electric valve III 23, electric valve IV 24, and electric valve VI 26; turn on solenoid valve I 28; start pneumatic diaphragm pump 41 to transport the liquid to be tested in process tank 1 to storage tank 52 and rinse the pipeline along the way; when the liquid in storage tank 52 triggers high level gauge 521, turn off solenoid valve I 28, electric valve III 23, and electric valve IV 24.

[0107] S2, sample and rinse; open fluid valve I 611, close fluid valve II 63 and fluid valve III 651, and use syringe pump I 64 to take 10-25 ml of the sample to be tested. Close fluid valve I 611, open fluid valve II 63, and add the sample to be tested into the sealed magnetic stirring bottle 7 through syringe pump I 64. Repeat 2-5 times. On the last time, syringe pump I 64 is not emptied, leaving 1-5 ml in syringe pump I 64. Turn on the drain pump 721 to drain the liquid in the sealed magnetic stirring bottle 7 into the storage tank 52.

[0108] S3, clean the sealed magnetic stirring bottle 7; open the fluid valve IV 9311 of the reaction pipe 931 that receives water, and close the other fluid valves IV 9311; draw 40-100 ml of water through the injection pump III 94, add the water to the sealed magnetic stirring bottle 7 through the multi-way valve II 921, and after magnetic stirring, turn on the drain pump 721 to drain the liquid in the sealed magnetic stirring bottle 7 into the storage tank 52, repeat 2-5 times;

[0109] S4, inject the remaining sample into the sealed magnetic stirring bottle 7 using syringe pump I64;

[0110] S5, Add reagents; Draw 5-30 ml of formaldehyde using syringe pump III94 and add it to the sealed magnetic stirring bottle 7; Draw 0.3-3 ml of bromothymol blue using syringe pump III94 and add it to the sealed magnetic stirring bottle 7; Stir magnetically;

[0111] S6, add water; open the fluid valve Ⅳ9311 of the reaction pipe 931 that receives water, and close the other fluid valves Ⅳ9311; draw 20-80 ml of water through the syringe pump Ⅲ94 and add it to the sealed magnetic stirring bottle 7;

[0112] S7, vent the common pipeline; open the fluid valve Ⅳ9311 of the air-connected reaction pipe 931, and use the injection pump Ⅲ94 to extract 2-20ml of air to discharge the residual drug solution in the pipeline into the sealed magnetic stirring bottle 7;

[0113] S8, add reference solution; start the photoelectric detection unit, and use the injection pump II913 to draw sodium hydroxide reference solution drop by drop into the sealed magnetic stirring bottle 7;

[0114] S9, Photoelectric detection unit data transmission; The photoelectric detection unit converts the color of the solution in the sealed magnetic stirring bottle 7 into a voltage value and transmits the collected data to the host computer 8 in real time. When the color of the solution in the sealed magnetic stirring bottle 7 changes abruptly, the voltage value is determined to reach a certain range as the titration endpoint, and the syringe pump II 913 is controlled to stop adding the reference solution. At the same time, the syringe pump II 913 transmits the amount of added reference solution to the host computer 8.

[0115] S10, Calculation and display; The host computer 8 calculates the concentration of the test liquid (g / L) based on the amount of test liquid added and the amount of reference solution used, and displays the concentration of the test liquid;

[0116] S11, empty the sealed magnetic stirring bottle 7; turn on the drain pump 721 to drain the liquid in the sealed magnetic stirring bottle 7 into the storage tank 52;

[0117] S12, empty the storage tank 52; open electric valve VII27, electric valve II22, solenoid valve I28, and start the pneumatic diaphragm pump 41 to discharge the liquid in the storage tank 52 to the corresponding reaction tank 1. When the liquid level in the storage tank 52 is low, close solenoid valve I28 and electric valve VII27.

[0118] S13, purge the pipeline; close electric valve VI26, open electric valves IV24, V25, and II22 to purge the liquid stored in the pipeline back to the original reaction tank 1. After 10-20 minutes, close electric valves I21, IV24, V25, and II22; the next testing cycle can be prepared.

[0119] Method 5: Manual sample delivery for acid concentration measurement. This method can be carried out according to the following steps:

[0120] S1, manually deliver the sample to reagent bottle 652, and manually input the liquid density;

[0121] S2, sample and rinse; open fluid valve Ⅲ651, close fluid valve Ⅱ63 and fluid valve Ⅰ611, use syringe pump Ⅰ64 to take 10-25 ml of the sample to be tested, close fluid valve Ⅲ651, open fluid valve Ⅱ63, add the sample to be tested into the sealed magnetic stirring bottle 7 through syringe pump Ⅰ64, repeat 2-5 times, turn on the drain pump 721 to drain the liquid in the sealed magnetic stirring bottle 7 into the storage tank 52;

[0122] S3, clean the sealed magnetic stirring bottle 7; open the fluid valve IV 9311 of the reaction pipe 931 that receives water, and close the other fluid valves IV 9311; draw 40-100 ml of water through the injection pump III 94, add the water to the sealed magnetic stirring bottle 7 through the multi-way valve II 921, and after magnetic stirring, turn on the drain pump 721 to drain the liquid in the sealed magnetic stirring bottle 7 into the storage tank 52, repeat 2-5 times;

[0123] S4, inject the remaining sample into the sealed magnetic stirring bottle 7 using syringe pump I64;

[0124] S5, Add reagent; Draw 0.3-3 ml of bromocresol green indicator through syringe pump III94 and add it to the sealed magnetic stirring bottle 7, and stir magnetically;

[0125] S6, add water; open the fluid valve Ⅳ9311 of the reaction pipe 931 that receives water, and close the other fluid valves Ⅳ9311; draw 20-80 ml of water through the syringe pump Ⅲ94 and add it to the sealed magnetic stirring bottle 7;

[0126] S7, vent the common pipeline; open the fluid valve Ⅳ9311 of the air-connected reaction pipe 931, and use the injection pump Ⅲ94 to extract 2-20ml of air to discharge the residual drug solution in the pipeline into the sealed magnetic stirring bottle 7;

[0127] S8, add reference solution; start the photoelectric detection unit, and use the injection pump II913 to draw sodium hydroxide reference solution drop by drop into the sealed magnetic stirring bottle 7;

[0128] S9, Photoelectric detection unit data transmission; The photoelectric detection unit converts the color of the solution in the sealed magnetic stirring bottle 7 into a voltage value and transmits the collected data to the host computer 8 in real time. When the color of the solution in the sealed magnetic stirring bottle 7 changes abruptly, the voltage value is determined to reach a certain range as the titration endpoint, and the syringe pump II 913 is controlled to stop adding the reference solution. At the same time, the syringe pump II 913 transmits the amount of added reference solution to the host computer 8.

[0129] S10, Calculation and display; The host computer 8 calculates and displays the concentration (%) of the test liquid based on the amount of the test liquid added, the amount of the reference solution used, and the density;

[0130] S11, empty the sealed magnetic stirring bottle 7; turn on the drain pump 721 to drain the liquid in the sealed magnetic stirring bottle 7 into the storage tank 52;

[0131] S12, clean the sealed magnetic stirring bottle 7; open the fluid valve IV 9311 of the reaction pipe 931 that receives water, and close the other fluid valves IV 9311; draw 40-100 ml of water through the injection pump III 94, and add the water to the sealed magnetic stirring bottle 7 through the multi-way valve II 921; after magnetic stirring, turn on the drain pump 721 to drain the liquid in the sealed magnetic stirring bottle 7 into the storage tank 52, and repeat 2-5 times;

[0132] After the inspection is completed, the cleaning equipment is ready for the next inspection cycle.

[0133] It is understood that the above description is only for illustrating specific embodiments of this application, but the protection scope of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be covered within the scope of disclosure of this application.

Claims

1. An automated multi-parameter concentration analysis system, characterized by, include: The liquid extraction section includes an extraction pipeline; the extraction pipeline is equipped with a rinsing and venting unit for controlling the extraction pipeline to extract liquid from the process tank (1) and supplying air to vent the liquid in the extraction pipeline to the storage tank (52); the extraction pipeline includes several delivery branches (11) for multiple process tanks (1), each delivery branch (11) is equipped with an electric valve I (21), all delivery branches (11) are connected to a delivery pipe (12), the delivery pipe (12) is equipped with an electric valve II (22) at its outer end, and the delivery pipe (12) is connected to a pipe I (301) in the middle, the pipe I (301) The infusion tube (12) is equipped with an electric valve III (23), which is connected to a pipe II (302). The pipe II (302) is connected to a pneumatic diaphragm pump (41), which is connected to a pipe III (303). The outer end of the infusion tube (12) is connected to the pipe III (303). The pipe III (303) is connected to an electric valve IV (24), which is connected to a pipe IV (304). The pipe IV (304) is connected to a tee connector (51), which is connected to one of the inlet ports of the tee connector (51). The pneumatic diaphragm pump (41) is... The air inlet is connected to pipe V (305), which is equipped with solenoid valve I (28). Solenoid valve I (28) is connected to pipe VI (306), which is equipped with air pump (42). Pipe VI (306) is connected to pipe VII (307), which is connected to electric valve V (25). Electric valve V (25) is connected to pipe VIII (308), which is connected to another liquid inlet of the three-way connector (51). Pipe VIII (308) is connected to pipe IX (309), which is connected to pipe IX (309). 9) Equipped with an electric valve VI (26), the outer end of the pipe IX (309) is connected to the liquid storage tank (52), the liquid storage tank (52) is equipped with a pipe X (310), one end of the pipe X (310) is close to the inner bottom of the liquid storage tank (52), the other end of the pipe X (310) is connected to the pipe II (302), the pipe X (310) is equipped with an electric valve VII (27); the outlet of the three-way connector (51) is connected to the liquid path I (61), the liquid path I (61) is equipped with a fluid valve I (611), the liquid path I (61) is equipped with a sample liquid quantitative dosing part; The sample liquid quantitative addition unit is used to quantitatively extract liquid from the aspiration tube and quantitatively add the sample liquid to the sealed magnetic stirring bottle (7); the bottle body of the sealed magnetic stirring bottle (7) is made of light-transmitting material; the sample liquid quantitative addition unit includes a four-way connector (62), one of the connectors of the four-way connector (62) is connected to the liquid path I (61), and the other three connectors of the four-way connector (62) are respectively equipped with liquid path II, liquid path III and liquid path IV, liquid path II is equipped with a fluid valve II (63), the outer end of the liquid path II is connected to the sealed magnetic stirring bottle (7), liquid path III is connected to the injection pump I (64), liquid path IV is equipped with a fluid valve III (651), and liquid path IV is connected to a sample delivery bottle (652); the sealed magnetic stirring bottle (7) is equipped with a titration reaction tube (92), the titration reaction tube (92) is connected to the sample delivery bottle (652) and the sample delivery bottle (65 ... 2) A multi-way valve II (921) is connected to the multi-way valve II (921), which is connected to a reaction main pipe (93) and an injection pump III (94). The reaction main pipe (93) is connected to a multi-way reaction branch pipe (931), and each of the reaction branch pipes (931) is equipped with a fluid valve IV (9311). Two of the reaction branch pipes (931) are connected to water and air respectively, and the outer ends of the other reaction branch pipes (931) are connected to a solvent bottle (9312). The sealed magnetic stirring bottle (7) is equipped with a connecting pipe (71) connected to the storage tank (52) and an empty pipe (72). The inner end of the connecting pipe (71) is located in the upper part of the inner cavity of the sealed magnetic stirring bottle (7), and the inner end of the empty pipe (72) is located in the lower part of the inner cavity of the sealed magnetic stirring bottle (7). The empty pipe (72) is equipped with a drain pump (721). The quantitative drug dispensing unit includes a reagent dispensing group and a reference drug dispensing group; the quantitative drug dispensing unit is equipped with a water supply unit and an air supply unit for cleaning and draining the liquid in the pipeline of the quantitative drug dispensing unit to the storage tank (52); the quantitative drug dispensing unit includes several reference drug tubes (91) installed in the sealed magnetic stirring bottle (7), the reference drug tubes (91) are connected to a multi-way valve I (911), the multi-way valve I (911) is connected to a reference drug container (912) and an injection pump II (913). The photoelectric detection unit includes a light wave emitting module and a receiving module respectively disposed on both sides of the sealed magnetic stirring bottle (7); Host computer (8).

2. The automated multi-parameter concentration analysis system of claim 1, wherein, The storage tank (52) is equipped with a high level gauge (521) and a low level gauge (522), which are used in the host computer (8).

3. The automated multi-parameter concentration analysis system of claim 1, wherein, The tee connector (51) is a vertical T-shaped tee with two liquid inlets located at the top and bottom, respectively, and each is equipped with a pressure sensing component (53).

4. The automated multi-parameter concentration analysis system of claim 1, wherein, The sealed magnetic stirring bottle (7) has a quartz bottle with a light transmittance of over 90% and a bottle cap connected to the bottle mouth by a thread. The bottle cap has a connecting pipe hole and a sealing element. The bottom of the quartz bottle is equipped with a magnetic stirring assembly.

5. The automated multi-parameter concentration analysis system of claim 1, wherein, The reference drug solution containers (912) include a sodium hydroxide bottle (9121), a potassium dichromate bottle (9122), and an EDTA bottle (9123).

6. The automated multi-parameter concentration analysis system of claim 1, wherein, The reaction pipe (931) for receiving water is equipped with a water tank, and the inner cavity of the water tank is equipped with a low water level gauge (9313); the reaction pipe (931) for receiving air is equipped with an air filter (9314); the reaction pipes (931) for receiving water and air are connected to the tail end of the main reaction pipe (93).

7. The automated multi-parameter concentration analysis system of claim 1, wherein, The solvent bottles (9312) include bromocresol green agent bottles, sodium diphenylamine sulfonate agent bottles, sulfur-phosphorus mixed acid agent bottles, chrome black T agent bottles, buffer agent bottles, bromothymol blue agent bottles, and formaldehyde agent bottles.

8. The automated multi-parameter concentration analysis system of claim 1, wherein, The discharge pump (721) is a diaphragm pump or a peristaltic pump.

9. The method of using an automated multi-parameter concentration analysis system of claim 1, wherein, The specific steps include: Sample delivery: Take a sample from the process tank (1) and transfer it to the sample bottle (652); Sample rinsing; Open fluid valve Ⅲ (651), close fluid valve Ⅰ (611) and fluid valve Ⅱ (63); injector pump Ⅰ (64) takes 10-25 ml of the sample to be tested from the sample bottle (652), open fluid valve Ⅱ (63), and add the sample to be tested into the sealed magnetic stirring bottle (7) through injector pump Ⅰ (64). Repeat the taking 2-5 times. The last time, 1-5 ml is left in injector pump Ⅰ (64). Turn on the drain pump (721) to drain the liquid in the sealed magnetic stirring bottle (7) into the storage tank (52). Clean the sealed magnetic stirring bottle (7); open the fluid valve IV (9311) of the reaction pipe (931) that receives water, and close the other fluid valves IV (9311); draw 40-100 ml of water through the injection pump III (94), add the water to the sealed magnetic stirring bottle (7) through the multi-port valve II (921), and after magnetic stirring, turn on the drain pump (721) to drain the liquid in the sealed magnetic stirring bottle (7) into the storage tank (52), repeat 2-5 times; Add the sample to be tested; the syringe pump I (64) adds the remaining sample to the sealed magnetic stirring bottle (7); Add reagents; draw the reagents from the solvent bottle (9312) using the syringe pump III (94) and add them to the sealed magnetic stirring bottle (7), and stir magnetically; Add water; open the fluid valve IV (9311) of the reaction pipe (931) that receives water, and close the other fluid valves IV (9311); draw 20-80 ml of water through the syringe pump III (94) and add it to the sealed magnetic stirring bottle (7); Empty the public pipeline; open the fluid valve Ⅳ (9311) of the air-connected reaction pipe (931), and use the injection pump Ⅲ (94) to draw 2-20 ml of air to discharge the residual drug solution in the pipeline into the sealed magnetic stirring bottle (7); Add the reference solution; The photoelectric detection unit is activated, and the reference drug solution in the reference drug solution container (912) is drawn drop by drop by the injection pump II (913) and added to the sealed magnetic stirring bottle (7); Data transmission from the photoelectric detection unit; The light wave emitting module emits a light beam that passes through the sealed magnetic stirring bottle (7). The receiving module converts the light signal into a voltage value and transmits the collected data to the host computer (8). When the color of the solution in the sealed magnetic stirring bottle (7) changes abruptly, the voltage value is determined to reach the target range as the titration endpoint. The injection pump II (913) is controlled to stop adding the reference drug solution. At the same time, the injection pump II (913) transmits the amount of added reference drug solution to the host computer (8). The calculation and display show that the host computer (8) calculates and displays the concentration of the test solution based on the amount of the test solution added, the amount of the reference solution used, and the density. Empty the sealed magnetic stirring bottle (7); turn on the drain pump (721) to drain the liquid in the sealed magnetic stirring bottle (7) into the storage tank (52); Clean the pipes.

Images