Water quality on-line titration analyzer

Abstract

The utility model discloses a water quality on-line titration analyzer which comprises a main control module, the main control module is connected with a display operation module, a driving module, a pump valve assembly and a titration detection module, and the pump valve assembly is further connected with the driving module and the titration detection module; the titration detection module comprises a titration container, one end of the titration container is provided with a spray washing piece and a plurality of joints connected with the pump valve assembly, the other end of the titration container is provided with a stirring assembly, and the titration container is further provided with a color sensor and a liquid level sensor. According to the analyzer provided by the utility model, efficient detection of water quality and automatic cleaning after detection are realized through a plurality of modules, and the analyzer is suitable for online detection of a titration process and automatic detection of large-batch samples; and by using the color sensor, the repeatability of the result can be improved, subjective errors in manual operation can be avoided, and the problems of complicated operation, low efficiency and difficulty in improving the accuracy and precision of the titration result of manual titration analysis can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality analysis, in particular to an online water quality titration analyzer. Background Art

[0002] In the water quality testing of drinking water, some parameters are tested using titration analysis, some of which are closely related to the water quality management of water plants. Typical parameters include: chloride, total hardness, and total alkalinity.

[0003] Chloride is a common inorganic anion in water and wastewater. The "Sanitary Standard for Drinking Water" (GB 5749-2022) stipulates that the chloride limit is 250 mg / L. Chloride content is one of the important indicators for evaluating water quality. High concentrations of chloride may indicate that the water source is contaminated. Monitoring the chloride content can help evaluate the suitability and safety of water quality. Chloride reacts with disinfectants (such as chlorine) in water to produce disinfection by-products, such as trihalomethanes and chloral. These disinfection by-products may cause harm to human health, including carcinogenicity and mutagenicity. Chloride in water can increase the conductivity of water, resulting in increased corrosiveness of water and damage to pipes and equipment. Monitoring chloride content can evaluate the corrosiveness of water and protect water treatment equipment and pipes. Long-term drinking of water with excessively high chloride concentrations may have negative effects on health, such as damage to the kidneys and cardiovascular system. Monitoring chloride content can help ensure the safety of drinking water. Currently, silver nitrate titration is mainly used to detect chloride.

[0004] Hardness is formed by calcium and magnesium. The "Sanitary Standard for Drinking Water" (GB 5749-2022) stipulates that the total hardness limit is 450 mg / L. Total hardness is an important parameter for evaluating the content of calcium and magnesium ions in drinking water. Monitoring the hardness of water quality can help evaluate the suitability and safety of water quality. High-hardness water will cause scale formation. Long-term use of high-hardness water will cause blockage and damage to pipes and equipment. Monitoring total hardness can help protect water treatment equipment and pipes. In addition, the hardness of water will affect the taste. Too high or too low hardness may affect the taste of water. By monitoring the total hardness, the hardness of water can be adjusted to improve the taste of drinking water. In the water treatment process, understanding the total hardness in water can help determine the appropriate water treatment method, such as softening treatment or appropriate water distribution. Currently, the disodium ethylenediaminetetraacetic acid titration method is mainly used to detect total hardness.

[0005] The sanitary standards for drinking water do not set a limit for total alkalinity, but its detection is also very important. Total alkalinity is the total amount of alkaline substances in water, which is essential for maintaining the acid-base balance of water. It is one of the important indicators for evaluating water quality. Understanding the total alkalinity in water can help evaluate the suitability and safety of water quality. Water with low alkalinity may be corrosive to pipes and equipment, causing damage to pipes and equipment. Monitoring total alkalinity can evaluate the corrosiveness of water and protect water treatment equipment and pipes. Currently, the acid-base titration method is mainly used to detect total alkalinity.

[0006] At present, manual titration is generally used to implement titration detection. The basic process is as follows: prepare a certain concentration of titration reagent and a sample to be tested; in order to more accurately determine the titration endpoint, an indicator is usually added to the sample to be tested, and the indicator will change color in the solution to indicate the endpoint of the titration; the sample to be tested is placed in a conical flask, and the titration reagent is added drop by drop to the sample to be tested using a burette, and the dripping speed is controlled by manually operating the stopcock or latex tube until the solution color changes (end point); according to the chemical reaction of the titration reagent and the solution to be tested, the concentration of the titration reagent and the volume consumed by the titration are used to calculate the content of the corresponding substance in the sample to be tested. However, there are some inevitable disadvantages of manual titration, including:

[0007] 1. The operator needs to use his / her eyes to judge the color change of the endpoint, which is subjective and has individual differences, and is prone to human errors;

[0008] 2. It takes a long time to operate, especially for large sample sizes or when repeated measurements are required, and the efficiency is low;

[0009] 3. Due to the limitations of the operator's technical level and experimental conditions, the accuracy of manual titration will be affected;

[0010] 4. After each water sample is taken, it is necessary to clean or replace the test bottle, add water sample and reagent, record the starting volume of the titration solution, operate the burette attentively, pay attention to the endpoint color and record the titration endpoint volume, and calculate the results. The process is cumbersome;

[0011] 5. Long-term manual titration can easily lead to operator fatigue, affecting the accuracy and repeatability of the measurement results.

[0012] In view of this, it is necessary to propose further improvements to the current water quality online titration analysis structure. Utility Model Content

[0013] Therefore, the utility model aims to solve the deficiencies in the prior art to at least a certain extent, thereby proposing an online water quality titration analyzer.

[0014] In order to achieve the above purpose, a technical solution adopted by the utility model is:

[0015] The utility model provides a water quality online titration analyzer, comprising a main control module, the main control module is connected with a display operation module, a drive module, a pump valve assembly and a titration detection module, and the pump valve assembly is also connected with the drive module and the titration detection module;

[0016] The titration detection module comprises a titration container, one end of which is provided with a spraying component and a plurality of joints connected to the pump valve assembly and used for adding samples, reagents and titration liquid, and the other end is provided with a stirring assembly. The titration container is also provided with a color sensor and a liquid level sensor.

[0017] Furthermore, a cover body is provided at one end of the titration container, and a plurality of the joints are provided through the cover body, and the plurality of joints include a first joint provided in the middle of the cover body and a plurality of second joints provided around the first joint, the first joint is connected to the spraying part, and the second joint is connected to the pump valve assembly.

[0018] Furthermore, one end of the first joint exposed outside the titration container is connected to a driving motor via a cleaning pipe, and the other end extends into the titration container and is connected to the spray cleaning component; one end of the second joint exposed outside the titration container is connected to the pump valve assembly, and the other end extends into the titration container and is arranged in an open position.

[0019] Furthermore, the pump-valve assembly at least includes a sample pump, a titration liquid pump, and a reagent pump, and the sample pump, the titration liquid pump, and the reagent pump are respectively connected to a plurality of the second connectors through a plurality of hoses.

[0020] Furthermore, the color sensor and at least two liquid level sensors are arranged on the outer surface of the titration container, and the at least two liquid level sensors include a first liquid level sensor and a second liquid level sensor, the first liquid level sensor and the color sensor are located on the same horizontal line, and the second liquid level sensor and the injection end of the spray cleaning part are located on the same horizontal line.

[0021] Furthermore, the color sensor is lower than the sample liquid level in the titration container in the horizontal direction.

[0022] Furthermore, the spray angle of the spray end of the spray cleaning member is 30°-150°.

[0023] Furthermore, the stirring assembly includes a magnetic stirring piece and a magnetic motor, the end of the titration container away from the joint is in contact with the magnetic motor, the magnetic stirring piece is arranged inside the end of the titration container close to the magnetic motor, and the magnetic motor drives the magnetic stirring piece to rotate in the titration container.

[0024] Furthermore, a dark box is sleeved on the outer side of the titration container; a liquid discharge port is provided at one end of the titration container close to the magnetic motor, and the liquid discharge port is connected to a two-way valve.

[0025] The utility model provides an online water quality titration analyzer, including a main control module, the main control module is connected to a display operation module, a drive module, a pump valve assembly and a titration detection module, the pump valve assembly is also connected to the drive module and the titration detection module; the titration detection module includes a titration container, one end of the titration container is provided with a spray cleaning part and a plurality of joints connected to the pump valve assembly and used for adding samples, adding reagents and adding titration liquid, the other end is provided with a stirring assembly, and the titration container is also provided with a color sensor and a liquid level sensor. Through the analyzer provided by the utility model, efficient detection of water quality and automatic cleaning after detection are achieved through multiple modules, which is suitable for online titration process and automatic detection of large batches of samples; and by using a color sensor, the repeatability of the result can be improved, and subjective errors in manual operation can be avoided, which can solve the problems of cumbersome operation, low efficiency and difficulty in improving the accuracy and precision of titration results in manual titration analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model 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 some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0027] Figure 1 It is a side view schematic diagram of one side of the water quality online titration analyzer of the utility model;

[0028] Figure 2 It is a front view schematic diagram of one side of the water quality online titration analyzer of the utility model;

[0029] Figure 3 It is a structural schematic diagram of the other side of the water quality online titration analyzer of the utility model;

[0030] Figure 4 It is a schematic diagram of a titration detection module of the water quality online titration analyzer of the utility model.

[0031] The reference numerals in the figure are as follows: 1. main control module; 2. display operation module; 3. drive module; 4. pump valve assembly; 5. titration detection module; 51. titration container; 52. cover body; 521. connector; 522. spray part; 53. color sensor; 54. liquid level sensor; 541. first liquid level sensor; 542. second liquid level sensor; 55. stirring assembly; 551. magnetic stirring part; 552. magnetic motor; 56. drain port; 57. two-way valve; 58. dark box; 6. shell; 7. door body; 8. hanging plate; 9. drive motor. DETAILED DESCRIPTION

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

[0033] It should be noted that the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0034] Please refer to Figures 1 to 4 The utility model provides a water quality online titration analyzer, including a main control module 1, the main control module 1 is connected with a display operation module 2, a drive module 3, a pump valve assembly 4 and a titration detection module 5, and the pump valve assembly 4 is also connected with the drive module 3 and the titration detection module 5;

[0035] The titration detection module 5 includes a titration container 51, one end of which is provided with a spray component 522 and multiple connectors 521 connected to the pump valve assembly 4 and used for adding samples, reagents and titration solutions, and the other end is provided with a stirring assembly 55. The titration container 51 is also provided with a color sensor 53 and a liquid level sensor 54.

[0036] In this embodiment, the water quality online titration analyzer includes a main control module 1, a display operation module 2, a drive module 3, a pump valve assembly 4 and a titration detection module 5. The main control module 1 is connected to the display operation module 2, the drive module 3, the pump valve assembly 4 and the titration detection module 5, wherein the main control module 1 is used to coordinate and manage the operation of the display operation module 2, the drive module 3, the pump valve assembly 4 and the titration detection module 5 in the instrument to realize the overall function of the instrument.

[0037] Specifically, the display operation module 2 manages and controls the operation of the display component, that is, the detection information about the water quality can be displayed on the display component, and processes the interactive response between people and instruments, that is, the user can operate on the display operation module 2 to select the content that needs to be displayed on the display component; the driving module 3 is used to control the operation of the pump valve assembly 4, and the pump valve assembly 4 is used to complete the operations of sampling, aspirating reagents and titration solutions.

[0038] In this embodiment, the titration detection module 5 includes a titration container 51, which is used to contain samples and perform titration reactions. One end of the titration container 51 is provided with multiple connectors 521 and a spraying member 522, and the multiple connectors 521 are connected to the pump valve assembly 4. The pump valve assembly 4 is connected to the corresponding samples and reagents through a hose, so that the samples and reagents are dripped into the titration container 51 through the multiple connectors 521 connected thereto for titration reactions. The spraying member 522 is used to clean the titration container 51, and it can spray cleaning liquid during cleaning to produce a high-pressure washing effect. A stirring assembly 55 is provided at one end of the titration container 51 away from the connector 521 and the spraying member 522, and the stirring assembly 55 is used to stir the solution in the titration container 51 during the titration process. The color sensor 53 on the titration container 51 uses human eye bionic color recognition technology to ensure that the color of the solution in the titration container 51 can be stably monitored, thereby improving the repeatability of the results and avoiding subjective errors in manual operation. The liquid sensor 54 on the titration container 51 is used to detect the liquid level of the solution in the titration container 51 .

[0039] In this embodiment, the water quality online titration analyzer also includes a housing 6, one side of which is connected to a door body 7 through a coupling and a lock, so that it is movably connected to the housing 6, so that the door body 7 can be switched on and off and connected to the housing 6. A hanging plate 8 is longitudinally installed inside the housing 6, and a display operation module 2, a pump valve assembly 4, and a titration detection module 5 are installed on the side of the hanging plate 8 close to the door body 7; and a main control module 1 and a drive module 3 are arranged on the side of the hanging plate 8 away from the door body 7.

[0040] In this embodiment, the specific steps of the water quality online titration analyzer are as follows:

[0041] 1. Before starting the titration, the color sensor 53 collects the color signal value in the titration container 51 and compares it with the preset color signal value of "the titration container 51 is empty and the cleanliness meets the requirements". When the difference meets the requirements, it is judged that the titration is ready;

[0042] 2. When the titration starts, the pump valve assembly 4 operates, and the sample box reagents to be tested enter the titration container 51 through the multiple joints 521 on the titration container 51, and the stirring assembly 55 operates to mix the solution in the titration container 51;

[0043] 3. The stirring component 55 is continuously operated, and the titration liquid is dripped from the joint 521 to the sample solution in the titration container 51 at a predetermined speed, and the color sensor 53 continuously monitors the color signal value of the solution; when the difference between the color signal value and the preset titration endpoint signal value meets the consistency requirement, the dripping of the titration liquid is stopped, and the stirring of the stirring component 55 is stopped;

[0044] 4. The main control module 1 calculates the volume of the consumed titrant according to the titration speed and titration time, and automatically brings it into the preset titration reaction formula to further calculate the content of the substance to be tested in the sample;

[0045] 5. After the titration reaction liquid is discharged, the titration container 51 is cleaned by the spray cleaning part 522;

[0046] 6. After cleaning is completed, the color sensor 53 collects the current color signal value and compares it with the preset color signal value of "the titration container is empty and the cleanliness meets the requirements". If the difference meets the requirements, the titration is judged to be ready. Otherwise, the cleaning process is performed again until the current color signal value meets the titration readiness condition.

[0047] The above titration process of the water quality online titration analyzer can realize automatic sample introduction, reagent addition, titration detection, cleaning and emptying, and realize efficient detection of water quality chloride, total hardness and total alkalinity parameters; it is suitable for online titration process and automatic detection of large batches of samples; and it uses human eye bionic color recognition technology to improve the repeatability of the results, avoid subjective errors in manual operation, and solve the problems of cumbersome operation, low efficiency and difficulty in improving the accuracy and precision of results of manual titration analysis.

[0048] Furthermore, a cover body 52 is provided at one end of the titration container 51, and a plurality of joints 521 are penetrated through the cover body 52. ​​The plurality of joints 521 include a first joint arranged in the middle of the cover body 52 and a plurality of second joints arranged around the first joint. The first joint is connected to the spraying part 522, and the second joint is connected to the pump valve assembly 4.

[0049] In this embodiment, a cover 52 is provided at one end of the titration container 51, and a thread is provided inside the cover 52, which matches the external thread on the titration container 51 and is used to close the titration container 51. A plurality of joints 521 are provided through the cover 52, and the plurality of joints 521 include a first joint and a second joint, wherein the first joint is provided at the middle position of the cover 52, and the second joint is provided on the cover 52 and around the first joint. Specifically, the first joint is connected to the spraying part 522, and a cleaning liquid can be added to the spraying part 522 through the first joint, so that the spraying part 52 can clean the inside of the titration container 51; the second joint is connected to the pump valve assembly 4, and is used for adding samples, adding reagents, or dripping titration liquid.

[0050] Furthermore, one end of the first joint exposed outside the titration container 51 is connected to the driving motor 9 through a cleaning pipe, and the other end extends into the titration container 51 and is connected to the spray component 52; one end of the second joint exposed outside the titration container 51 is connected to the pump valve assembly 4, and the other end extends into the titration container 51 and is arranged in an open position.

[0051] In this embodiment, the first joint extends to the top of the cover 52, that is, the part exposed to the titration container 51 is connected to the drive motor 9 through the cleaning pipe, and extends to the bottom of the cover 52, that is, the part extending to the inside of the titration container 51 is used to assemble the spraying part 522, wherein the connection mode of the spraying part 522 and the first joint can be integrally formed, that is, the corresponding structure is directly provided on the cover 52; or it can be detachably connected, that is, one end of the spraying part 522 is assembled on the first joint, and the other end is the spraying end, which extends into the titration container 51 and cleans the inside of the titration container 51, and does not contact the titration solution during the titration process. Among them, the spraying part 522 is connected to the drive motor 9 through the first joint and the cleaning pipe, so that the spraying part 522 can produce a moving spraying effect and a high-pressure washing effect, including rotating spraying and telescopic spraying, which is used to enhance the cleaning effect in the characteristic scene, and the specific material of the spraying part 522 can be metal, alloy, ceramic, glass, plastic, etc., and its specific material is not limited here, as long as it is not corroded by the cleaning liquid. The driving motor 9 in this embodiment is specifically a DC water pump.

[0052] The second connector extends to the top of the cover 52, that is, the part exposed outside the titration container 51 is connected to the pump valve assembly 4, and extends to the bottom of the cover 52, that is, one end extending to the inside of the titration container 51 is open and is used for adding samples, adding reagents or titrating the titration solution.

[0053] Furthermore, the pump-valve assembly 4 at least includes a sample pump, a titration liquid pump, and a reagent pump, and the sample pump, the titration liquid pump, and the reagent pump are respectively connected to the plurality of second connectors through a plurality of hoses.

[0054] In this embodiment, the pump-valve assembly 4 includes a sample pump, a titration liquid pump, a reagent pump, and also includes pumps and multi-way valves for indicators, buffer solutions and other reaction reagents other than titration liquids. The sample pump, titration liquid pump, reagent pump and other pumps and multi-way valves are connected to corresponding samples and reagents through sample tubes, titration liquid tubes and reagent tubes, thereby completing the operations of sampling, aspirating reagents and titration liquids. The pumps connected with samples and reagents are respectively connected to multiple second connectors through hoses, and the samples and reagents are respectively dropped into the titration container 51 for titration reaction.

[0055] Furthermore, a color sensor 53 and at least two liquid level sensors 54 are arranged on the outer surface of the titration container 51, and the at least two liquid level sensors 54 include a first liquid level sensor 541 and a second liquid level sensor 542. The first liquid level sensor 541 and the color sensor 53 are located on the same horizontal line, and the second liquid level sensor 542 and the injection end of the spray cleaning part 522 are located on the same horizontal line.

[0056] In this embodiment, the color sensor 53 and at least two liquid level sensors 54 are all arranged on the outer surface of the titration container 51. The at least two liquid level sensors 54 include a first liquid level sensor 541 and a second liquid level sensor 542. The first liquid level sensor 541 and the color sensor 53 are located on the same horizontal line, but this does not affect the accuracy of the color sensor in detecting the color. The first liquid level sensor 541 operates when the color sensor 53 reads the liquid color. The liquid level monitoring ensures the existence of a valid liquid level, so that the reading of the liquid color value is effective.

[0057] The second liquid level sensor 542 and the spray end of the spray cleaning member 522 are located on the same horizontal line, monitoring the liquid level to ensure that the liquid level is below the spray end of the spray cleaning member 522, preventing the liquid level in the titration container 51 from being too high, and preventing the liquid from contaminating the high position of the titration container 51 or the cover 52.

[0058] Furthermore, the color sensor 53 is lower than the sample liquid level in the titration container 51 in the horizontal direction.

[0059] In this embodiment, the color sensor 53 is disposed outside the titration container 51 and is lower than the sample liquid level in the titration container 51 in the horizontal direction, thereby ensuring that the color of the solution can be stably monitored.

[0060] The color sensor 53 may specifically be an RGB sensor, a camera or a spectral detector. The specific type of the color sensor 53 is not limited here and is set according to actual production requirements.

[0061] Furthermore, the spray angle of the spray end of the spray cleaning member 52 is 30°-150°.

[0062] In this embodiment, the spray angle of the spray end of the spray cleaning member 52 is 30°-150°, and the inner wall of the titration container 51 can be cleaned by the large-angle spraying of the spray cleaning member 52 .

[0063] Furthermore, the stirring assembly 55 includes a magnetic stirring member 551 and a magnetic motor 552. The end of the titration container 51 away from the joint 521 is in contact with the magnetic motor 552. The magnetic stirring member 551 is arranged inside the end of the titration container 51 close to the magnetic motor 552. The magnetic motor 552 drives the magnetic stirring member 551 to rotate in the titration container 51.

[0064] In this embodiment, the stirring assembly 55 includes a magnetic stirring member 551 and a magnetic motor 552. The end of the titration container 51 away from the joint 521 is in contact with the magnetic motor 552. The magnetic stirring member 551 is arranged inside the titration container 51 and at the end of the titration container 51 away from the joint 521, so that the position of the magnetic stirring member 551 can correspond to the position of the magnetic motor 552, and the magnetic motor 552 can drive the magnetic stirring member 551 to rotate in the titration container 51, which is used for stirring the solution in the titration process in the titration container 51.

[0065] The magnetic stirring element 551 in this embodiment is specifically a magnetic stirring bar. The specific type of the magnetic stirring element 551 is not limited here and is set according to actual production requirements.

[0066] Furthermore, a dark box 58 is sleeved on the outer side of the titration container 51 ; a liquid discharge port 56 is provided at one end of the titration container 51 close to the magnetic motor 552 , and the liquid discharge port 56 is connected to a two-way valve 57 .

[0067] In this embodiment, a dark box 58 is sleeved on the outer side of the titration container 51, and the dark box 58 provides a light-proof environment for titration detection. The titration container 51 is located inside the dark box 58 and is centrally symmetrical with the dark box 58, that is, the titration container 51 is arranged at the center of the dark box 58. A liquid discharge port 56 is provided at the bottom of the titration container 51, that is, at the end close to the magnetic motor 552, and is connected to a two-way valve 57 so that it is opened after the titration is completed or during spray washing, and is used to discharge the reaction waste liquid and the washing waste liquid.

[0068] Furthermore, the specific cleaning method of the titration container 51 is:

[0069] 1. The cleaning liquid is sprayed out from the spray end of the spray cleaning member 52 to produce pressure washing on the titration container 51. At the same time, the valve of the liquid discharge port 56 is opened, and the washing liquid is discharged immediately;

[0070] The spraying can be intermittent or continuous; and the spraying time is 2s to 120s;

[0071] 2. The cleaning liquid is sprayed out from the spraying part 52, and at the same time, the magnetic motor 552 at the bottom of the titration container 51 is running, and the magnetic stirring rod rotates to stir the cleaning liquid to produce stirring and flushing. After the end, the valve of the discharge port 56 is opened to discharge the liquid;

[0072] After the spraying and washing is completed, the stirring is continued for 0 to 120 seconds;

[0073] Moreover, the ratio of the total volume of the cleaning liquid sprayed out to the capacity of the titration container is 1:5 to 4:5, which is necessary to produce an effective cleaning effect on the one hand and to leave room for stirring on the other hand.

[0074] The cleaning liquid may be pure water, acid solution, alkali solution, oxidant, reducing agent, organic solvent, etc., whichever can effectively clean the reaction liquid remaining inside the titration container 51 and on the magnetic stirrer.

[0075] Furthermore, the specific implementation methods of the water quality online titration analyzer in the embodiment of the present application for the detection of different parameters are as follows:

[0076] 1. Online titration analysis of water quality for chloride detection

[0077] ①Pump valve assembly

[0078] 4 peristaltic pumps: peristaltic pump 1 is connected to the sample, peristaltic pump 2 is connected to the indicator, peristaltic pump 3 is connected to the dilute acid solution, and peristaltic pump 4 is connected to the titrant;

[0079] 2 DC pumps: DC pump 1 is connected to the cleaning fluid, and DC pump 2 is connected to the drain port;

[0080] 1 three-way valve: connects water sample, pure water and sample hose, used to switch water sample and pure water;

[0081] ②Joint of the titration vessel cover

[0082] 5 connectors, the middle connector is connected to DC pump 1 to connect the cleaning solution, and the remaining 4 connectors are connected to the sample, indicator, dilute acid solution and titration solution through peristaltic pumps 1, 2, 3 and 4 respectively;

[0083] 2. Online titration analysis of water quality for total hardness detection

[0084] ①Pump valve assembly

[0085] 4 peristaltic pumps: peristaltic pump 1 is connected to the sample, peristaltic pump 2 is connected to the buffer solution, peristaltic pump 3 is connected to the indicator, and peristaltic pump 4 is connected to the titrant;

[0086] 2 DC pumps: DC pump 1 is connected to the cleaning fluid, and DC pump 2 is connected to the drain port;

[0087] 1 three-way valve: connects water sample, pure water and sample hose, used to switch water sample and pure water;

[0088] ②Joint of the titration vessel cover

[0089] 5 connectors, the middle connector is connected to DC pump 1 to connect the cleaning solution, and the remaining 4 connectors are connected to the sample, buffer solution, indicator and titrant through peristaltic pumps 1, 2, 3 and 4 respectively;

[0090] 3. Online titration analysis of water quality for total alkalinity detection

[0091] ①Pump valve assembly

[0092] 3 peristaltic pumps: peristaltic pump 1 is connected to the sample, peristaltic pump 2 is connected to the indicator, and peristaltic pump 3 is connected to the titrant

[0093] 2 DC pumps: DC pump 1 is connected to the cleaning fluid, DC pump 2 is connected to the drain port

[0094] 1 three-way valve: connect water sample, pure water and sample hose, used to switch water sample and pure water

[0095] ②Joint of the titration vessel cover

[0096] There are 4 connectors, the middle connector is connected to DC pump 1 to connect the cleaning solution, and the remaining 3 connectors are connected to the sample, indicator and titration solution through peristaltic pumps 1, 2 and 3 respectively.

[0097] The utility model provides an online water quality titration analyzer, including a main control module, the main control module is connected to a display operation module, a drive module, a pump valve assembly and a titration detection module, the pump valve assembly is also connected to the drive module and the titration detection module; the titration detection module includes a titration container, one end of the titration container is provided with a spray cleaning part and a plurality of joints connected to the pump valve assembly and used for adding samples, adding reagents and adding titration liquid, the other end is provided with a stirring assembly, and the titration container is also provided with a color sensor and a liquid level sensor. Through the analyzer provided by the utility model, efficient detection of water quality and automatic cleaning after detection are achieved through multiple modules, which is suitable for online titration process and automatic detection of large batches of samples; and by using a color sensor, the repeatability of the result can be improved, and subjective errors in manual operation can be avoided, which can solve the problems of cumbersome operation, low efficiency and difficulty in improving the accuracy and precision of titration results in manual titration analysis.

[0098] It should be noted that the various embodiments in the present invention are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0099] It should also be noted that, in the present invention, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0100] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined in the present invention may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown in the present invention, but will conform to the widest range consistent with the principles and novel features disclosed in the present invention.

Claims

1. A water quality online titration analyzer, characterized in that: It includes a main control module, the main control module is connected to a display operation module, a drive module, a pump valve assembly and a titration detection module, and the pump valve assembly is also connected to the drive module and the titration detection module; The titration detection module comprises a titration container, one end of which is provided with a spraying component and a plurality of joints connected to the pump valve assembly and used for adding samples, reagents and titration liquid, and the other end is provided with a stirring assembly. The titration container is also provided with a color sensor and a liquid level sensor.

2. The water quality online titration analyzer according to claim 1, characterized in that: A cover is provided at one end of the titration container, and a plurality of joints are provided through the cover. The plurality of joints include a first joint provided in the middle of the cover and a plurality of second joints provided around the first joint. The first joint is connected to the spraying part, and the second joint is connected to the pump valve assembly.

3. The water quality online titration analyzer according to claim 2, characterized in that: One end of the first joint exposed outside the titration container is connected to a driving motor via a cleaning pipe, and the other end extends into the titration container and is connected to the spray cleaning component; one end of the second joint exposed outside the titration container is connected to the pump valve assembly, and the other end extends into the titration container and is open.

4. The water quality online titration analyzer according to claim 3, characterized in that: The pump-valve assembly at least comprises a sample pump, a titration liquid pump, and a reagent pump, and the sample pump, the titration liquid pump, and the reagent pump are respectively connected to a plurality of the second connectors through a plurality of hoses.

5. The water quality online titration analyzer according to claim 1, characterized in that: The color sensor and at least two liquid level sensors are arranged on the outer surface of the titration container, and the at least two liquid level sensors include a first liquid level sensor and a second liquid level sensor. The first liquid level sensor and the color sensor are located on the same horizontal line, and the second liquid level sensor and the injection end of the spray cleaning part are located on the same horizontal line.

6. The water quality online titration analyzer according to claim 1, characterized in that: The color sensor is lower than the sample liquid level in the titration container in a horizontal direction.

7. The water quality online titration analyzer according to claim 5, characterized in that: The spray angle of the spray end of the spray cleaning member is 30°-150°.

8. The water quality online titration analyzer according to claim 1, characterized in that: The stirring assembly includes a magnetic stirring piece and a magnetic motor. The end of the titration container away from the joint is in contact with the magnetic motor. The magnetic stirring piece is arranged inside the end of the titration container close to the magnetic motor. The magnetic motor drives the magnetic stirring piece to rotate in the titration container.

9. The water quality online titration analyzer according to claim 8, characterized in that: A dark box is also sleeved on the outside of the titration container; a liquid discharge port is provided at one end of the titration container close to the magnetic motor, and the liquid discharge port is connected to a two-way valve.

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