Device for detecting silicon dioxide in seawater
By combining water pump mixing with multiple detection light source groups, reaction receivers and temperature control devices, the accuracy problem of measuring the silica content in seawater using the molybdenum blue colorimetric method was solved, and high-precision silica detection in seawater was achieved.
Patent Information
- Application Number
- CN202422203984.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-09-09
AI Technical Summary
The existing molybdenum blue colorimetric method is susceptible to interference from day and night temperature differences, seawater turbidity and various ions when measuring the silica content in seawater, resulting in low measurement accuracy.
A water pump is used to drive the mixing of seawater and reagents, multiple sets of detection light source groups and reaction receivers are used, and a temperature control device is combined to optimize the temperature effect. The threshold value of the interfering ion concentration is determined through closed-loop circulation pipelines and multiple sets of parallel experiments, and masking agents are added to reduce interference and improve detection accuracy.
It significantly improves the accuracy of silica measurement in seawater, reduces the impact of day and night temperature differences and ion interference, and reduces detection errors and environmental pollution.
Smart Images
Figure CN223346748U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of silicon dioxide detection, in particular to a device for detecting silicon dioxide in seawater. Background Art
[0002] The silicon dioxide (SiO2) content is an important indicator for measuring seawater quality, and the silicon molybdenum blue colorimetry is the national standard method for measuring the silicon dioxide content in seawater.
[0003] The above-mentioned existing technical solutions have the following defects: the existing molybdenum blue colorimetric method is mostly affected by the temperature difference between day and night, seawater turbidity and various ions in seawater, which often leads to low accuracy of SiO2 measurement results and brings many troubles to analysts. Utility Model Content
[0004] The purpose of the utility model is to provide a fully responsive device for detecting silicon dioxide in seawater.
[0005] To achieve the above objectives, the present invention provides the following technical solutions:
[0006] A device for detecting silica in seawater, comprising an input unit, a reaction reagent, a detection device, an output unit, a mounting box, and a temperature control device. The input unit internally contains seawater samples and pure water samples for providing water samples. The detection device internally includes a transparent container for storing liquid, a detection light source group for irradiating the liquid, and a reaction receiver for receiving and detecting light source signals.
[0007] The seawater sample and the pure water sample are connected to the transparent container, the reaction reagent includes a first reagent, a second reagent and a third reagent, and the first reagent, the second reagent and the third reagent are connected to the transparent container;
[0008] The input unit, reaction reagent and detection device are installed inside the installation box, and a temperature control device for detecting and regulating the temperature inside the installation box is provided inside the installation box.
[0009] By adopting the above technical solution, the first reagent, the second reagent and the third reagent are added successively to the seawater sample and the pure water sample, thereby ensuring that the first reagent, the second reagent and the third reagent and the seawater sample and the pure water sample fully react, increasing the overall mixing effect, and thus increasing the overall detection accuracy.
[0010] Furthermore, one end of the seawater sample and the pure water sample is fixedly connected to a first connecting pipe for connection, the end of the first connecting pipe away from the seawater sample and the pure water sample is fixedly connected to a first water pump, the water outlet end of the first water pump is fixedly connected to a first water outlet pipe, and the end of the first water outlet pipe away from the first water pump extends to the interior of the transparent container.
[0011] By adopting the above technical solution, the seawater sample and the pure water sample are driven into the transparent container by the first water pump, which facilitates the overall mixing, thereby ensuring the overall sufficient reaction and increasing the accuracy of the overall detection.
[0012] Furthermore, one end of the first reagent, the second reagent and the third reagent is fixedly connected to a second connecting pipe for connection, the end of the second connecting pipe away from the first reagent, the second reagent and the third reagent is fixedly connected to a second water pump, the output end of the second water pump is fixedly connected to a second water outlet pipe, and the end of the second water outlet pipe away from the second water pump extends to the inside of the transparent container.
[0013] By adopting the above technical solution, the second water pump is used to drive the first reagent, the second reagent and the third reagent into the transparent container, which facilitates the overall mixing, thereby ensuring the overall sufficient reaction and increasing the accuracy of the overall detection.
[0014] Furthermore, first pipeline detectors for detecting pipelines are provided at both ends of the first connecting pipeline and the first water outlet pipe, and second pipeline detectors for detecting pipelines are provided at both ends of the second connecting pipeline and the second water outlet pipe.
[0015] By adopting the above technical solution, the first pipeline detector and the second pipeline detector can respectively detect the pipeline status, thereby ensuring an overall good detection status and preventing water leakage in the pipeline.
[0016] Furthermore, the output unit includes a liquid discharge pipe fixed to one end of the transparent container, and a valve is fixedly connected to the outside of the liquid discharge pipe.
[0017] By adopting the above technical solution, the waste liquid is discharged using a drainage pipe, thereby ensuring an overall good drainage effect, while facilitating the treatment of the waste liquid and increasing the overall practicality.
[0018] Furthermore, there are three corresponding groups of detection light source groups and reaction receivers, and the detection light source groups and reaction receivers are adapted to each other.
[0019] By adopting the above technical solution, the detection light source group and the reaction receiver can fully detect the liquid after the reaction to ensure an overall good detection effect. At the same time, multiple groups of detection light source groups and reaction receivers are provided to detect liquids at different positions to prevent misdetection.
[0020] Furthermore, the temperature control device includes a cooling block and a refrigeration plate installed on the inner wall of the installation box. The outside of the cooling block and the refrigeration plate is fixedly connected to a heat dissipation block for enhancing heat dissipation. The outside of the heat dissipation block on the side of the cooling block away from the refrigeration plate is fixedly connected to an internal fan. The outside of the heat dissipation block on the side of the refrigeration plate away from the cooling block is fixedly connected to an external fan. A Peltier temperature measuring unit for detecting the internal temperature of the installation box is also provided inside the installation box.
[0021] In summary, the beneficial technical effects of the present invention are:
[0022] 1. A water pump is used to drive the mixing of water samples and reagents to ensure that the water samples and reagents can be fully mixed. During the detection process, the water pump will drive the water samples and reagents to be added slowly to ensure that the water samples and reagents react fully. The pipeline volume is optimized and a closed-loop circulation pipeline is used. The pipeline diameter and length are controlled within a small range. The flow rate of the reagents is accurately controlled, the chemical reaction time is increased, the reagent dosage is reduced, the secondary pollution of the environment is reduced, and the effect of full reaction is achieved.
[0023] 2. The first pipeline detector and the second pipeline detector are used. The first pipeline detector and the second pipeline detector can fully detect the condition of the pipeline to ensure the normal operation of the whole, thereby ensuring the overall detection effect and producing the effect of full pipeline detection;
[0024] 3. Three groups of detection light source groups and reaction receivers are used to facilitate the detection of the liquid state. During the detection process, liquids at different positions can be detected, reducing the probability of detection errors, optimizing the influence of interfering ions, and step-by-step checking of several key ion elements that affect the measurement of silica in seawater. Multiple groups of parallel experiments are conducted to determine the concentration threshold value of interfering ions that affect the silica measurement process. A small amount of masking agent is added in a targeted manner to remove the influence of interfering ions, resulting in high-precision detection results.
[0025] 4. A temperature control device is used to optimize the temperature impact. The PID precise temperature control principle is used to place the light source, silicon photocell, and reagents that are easily affected by temperature during the measurement process in an insulated box. The MCU accurately controls the temperature to solve the impact of the temperature difference between day and night, slow down the deterioration time of the reagents, increase the shelf life of the reagents, and reduce the operation and maintenance cycle. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 This is a schematic diagram of the overall structure of the utility model;
[0027] Figure 2 This is a schematic diagram of the pipeline connection structure of the utility model;
[0028] Figure 3 This is a schematic diagram of the workflow of the utility model;
[0029] Figure 4 This is a schematic diagram of the distribution structure of the temperature control device of the utility model;
[0030] Figure 5 This is the principle diagram of the Peltier temperature measurement unit of the utility model.
[0031] In the figure, 1. input unit; 2. reaction reagent; 3. detection device; 4. output unit; 5. installation box; 6. temperature control device; 11. seawater sample; 12. pure water sample; 13. first connecting pipe; 14. first water pump; 15. first water outlet pipe; 16. first pipeline detector; 21. first reagent; 22. second reagent; 23. third reagent; 24. second connecting pipe; 25. second water pump; 26. second water outlet pipe; 27. second pipeline detector; 31. transparent container; 32. detection light source group; 33. reaction receiver; 41. drain pipe; 42. valve; 51. Peltier temperature measuring unit; 61. cooling block; 62. refrigeration plate; 63. heat sink; 64. internal fan; 65. external fan. DETAILED DESCRIPTION
[0032] The present invention will be described in further detail below with reference to the accompanying drawings.
[0033] Reference Figure 2 A device for detecting silica in seawater includes an input unit 1, a reaction reagent 2, a detection device 3, an output unit 4, a mounting box 5, and a temperature control device 6. The input unit 1 internally includes a seawater sample 11 and a pure water sample 12 for providing water samples. The detection device 3 internally includes a transparent container 31 for storing liquid, a detection light source group 32 for irradiating the liquid, and a reaction receiver 33 for receiving and detecting light source signals.
[0034] The seawater sample 11 and the pure water sample 12 are connected to the transparent container 31. The reaction reagent 2 includes a first reagent 21, a second reagent 22 and a third reagent 23. The first reagent 21, the second reagent 22 and the third reagent 23 are connected to the transparent container 31.
[0035] The input unit 1, the reaction reagent 2 and the detection device 3 are installed inside the installation box 5. The installation box 5 is provided with a temperature control device 6 for detecting and regulating the temperature inside the installation box 5;
[0036] Reference Figure 1, the seawater sample 11 and the pure water sample 12 are connected to the transparent container 31, the reaction reagent 2 includes a first reagent 21, a second reagent 22 and a third reagent 23, the first reagent 21, the second reagent 22 and the third reagent 23 are connected to the transparent container 31, the transparent container 31 facilitates the reagents and the water sample to fully react, ensures a good overall reaction and sufficient contact reaction, and increases the overall reaction effect. One end of the seawater sample 11 and the pure water sample 12 is fixedly connected to a first connecting pipe 13 for connection, and the first connecting pipe 13 is fixedly connected to one end away from the seawater sample 11 and the pure water sample 12. A first water pump 14 is connected, and a first water outlet pipe 15 is fixedly connected to the water outlet end of the first water pump 14. The end of the first water outlet pipe 15 away from the first water pump 14 extends to the inside of the transparent container 31. The first water pump 14 can drive the seawater sample 11 and the pure water sample 12 to slowly enter the transparent container 31, so as to fully react with the reagents to ensure a good overall reaction effect. One end of the first reagent 21, the second reagent 22 and the third reagent 23 is fixedly connected to a second connecting pipe 24 for connection. The end of the second connecting pipe 24 away from the first reagent 21, the second reagent 22 and the third reagent 23 is fixedly connected to the second water pump 25, the output end of the second water pump 25 is fixedly connected to the second water outlet pipe 26, and the second water outlet pipe 26 extends to the inside of the transparent container 31 away from the end of the second water pump 25. The second water pump 25 can drive the first reagent 21, the second reagent 22 and the third reagent 23 to slowly enter the transparent container 31, so as to fully react with the water sample to ensure an overall good reaction effect. The first connecting pipe 13 and the first water outlet pipe 15 are provided with a first pipeline detector 16 for detecting the pipeline at both ends, and the second connecting pipe 24 and the second water outlet pipe 26 are provided with a second pipeline detector 27 for detecting the pipeline. The first pipeline detector 16 and the second pipeline detector 27 are existing equipment, mainly used to detect the condition of the pipeline, and are not the focus of this design, so the pipeline detector is not tested. The output unit 4 includes a drain pipe 41 fixed at one end of the transparent container 31, and a valve 42 is fixedly connected to the outside of the drain pipe 41 to facilitate the discharge of waste liquid, thereby increasing the overall practicality. There are three corresponding groups of detection light source groups 32 and reaction receivers 33, and the detection light source groups 32 and reaction receivers 33 are adapted to each other. The three corresponding groups of detection light source groups 32 and reaction receivers 33 are convenient for multi-point detection, thereby reducing the overall detection error.
[0037] Reference Figure 4The temperature control device 6 includes a cooling block 61 and a cooling fin 62 mounted on the inner wall of the installation box 5. A heat dissipation block 63 for enhancing heat dissipation is fixedly connected to the outside of the cooling block 61 and the cooling fin 62. An internal fan 64 is fixedly connected to the outside of the heat dissipation block 63 on the side of the cooling block 61 away from the cooling fin 62. An external fan 65 is fixedly connected to the outside of the heat dissipation block 63 on the side of the cooling block 61 away from the cooling fin 62. A Peltier temperature measuring unit 51 for detecting the internal temperature of the installation box 5 is also provided inside the installation box 5;
[0038] Reference Figure 5 The temperature difference between day and night has a certain impact on the detection device LED, signal receiving device and reagents. The Peltier temperature control board is combined with the PID temperature control principle to design a precise temperature control unit. The detection device and reagents are placed in an insulation layer. The fan inside the box and the fan outside the box are used to dissipate heat together. The temperature is controllable and the impact of the temperature difference between day and night on the measurement data during the monitoring process is optimized.
[0039] In order to verify the influence of the day and night temperature difference on the SiO2 measurement data in seawater, a constant temperature box is used to control the temperature at about 3°C, and a SiO2 precise temperature control instrument is used to control the temperature of the reaction box at 25°C, simulating a day and night temperature difference of about 20°C. At the same time, SiO2 with the same standard concentration value is measured. The measurement data are shown in Table 3.
[0040] Table 1 Comparison of measurement results of day and night temperature difference
[0041]
[0042] The results show that when the temperature difference between day and night is about 20°C, the relative error of SiO2 concentration measurement is reduced from the original maximum of about 8% to less than 2%. This shows that the optimized design achieves precise temperature control and greatly improves the accuracy of SiO2 measurement.
[0043] The main function of the water channel switching valve is to help the reagents to be sucked in and out. At the same time, the three-way valve also plays the role of switching the water channel. The hose is convenient for connecting pipes of different models and diameters to the three-way valve connector. However, the hose is easy to tangle, resulting in poor water flow. In order to avoid using the hose, the pipeline directly installed the three-way valve and the general pipeline in a micro-flow system, and dug out multiple switching water flow channels inside to form a micro-flow circulation system. This requires high mechanical processing technology and the cost is also greatly increased accordingly. This time, a conversion joint is designed directly at the front end of the three-way valve joint, abandoning the hose connection method. One end is against the three-way valve joint, and the other end directly comes out of the hard pipe diameter insertion size. The pagoda structure is not easy to fall off, and the hard pipe is inserted in a straight-in manner. A three-way valve corresponds to a reagent type to form a water circulation system. By switching different modes through the three-way valve, reagents are added step by step, including the water sample to be tested, the pure water required for cleaning the pipeline, the reagents involved in the reaction, and the waste liquid discharge port. A peristaltic pump, a transparent glass container, a light source and an optical signal receiver are added to form a detection system.
[0044] In this way, the rigid tube tightly connects the water sample to be tested, the reagents and each independent component, thus eliminating to the greatest extent the occurrence of measurement abnormalities caused by bubbles in the water channel due to blocked water channels. At the same time, the difficulty of the processing technology is greatly reduced, which saves costs. At the same time, according to different chemical principles, the types of reagents can be increased or decreased to achieve the effect of "one machine for multiple measurements".
[0045] The implementation principle of this embodiment is as follows: first, water is pumped into the pipeline through the first water outlet pipe 15, and the volume of the water sample per unit time is calculated according to the length and cross-sectional area of the closed-loop pipeline. The injection speed is obtained by combining the amount of reagent extracted per second by peristalsis. Combined with the concentration ratio of the chemical reaction formula, the order of extracting water is as follows: first, the sample is introduced, and then reagents 1, 2, and 3 are introduced respectively. After mixing and stirring for 4 minutes, the solution color is stable. The reaction solution enters the colorimetric cell, and the specific detection light source group 32 is turned on. The reaction receiver 33 obtains the signal value. Different concentrations correspond to different signal values. Pipeline alarms are installed at the beginning and end of the closed-loop pipeline. In the event of leakage or water shortage in the pipeline, an alarm is prompted, which greatly improves the timeliness of finding pipeline abnormalities and the accuracy of seawater detection results, and has better repeatability.
[0046] The embodiments of this specific implementation method are all preferred embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the scope of protection of the present utility model.
Claims
1. A device for detecting silica in seawater, comprising an input unit (1), a reaction reagent (2), a detection device (3), an output unit (4), a mounting box (5) and a temperature control device (6), characterized in that: The input unit (1) internally includes a seawater sample (11) and a pure water sample (12) for providing water samples, and the detection device (3) internally includes a transparent container (31) for storing liquid, a detection light source group (32) for irradiating the liquid, and a reaction receiver (33) for receiving and detecting light source signals; The seawater sample (11) and the pure water sample (12) are in communication with the transparent container (31); the reaction reagent (2) includes a first reagent (21), a second reagent (22) and a third reagent (23); the first reagent (21), the second reagent (22) and the third reagent (23) are in communication with the transparent container (31); The input unit (1), reaction reagent (2) and detection device (3) are installed inside the installation box (5). A temperature control device (6) for detecting and regulating the internal temperature of the installation box (5) is provided inside the installation box (5).
2. The device for detecting silicon dioxide in seawater according to claim 1, characterized in that: One end of the seawater sample (11) and the pure water sample (12) is fixedly connected to a first connecting pipe (13) for connection, one end of the first connecting pipe (13) away from the seawater sample (11) and the pure water sample (12) is fixedly connected to a first water pump (14), and the water outlet end of the first water pump (14) is fixedly connected to a first water outlet pipe (15), and the end of the first water outlet pipe (15) away from the first water pump (14) extends to the interior of the transparent container (31).
3. The device for detecting silicon dioxide in seawater according to claim 2, characterized in that: One end of the first reagent (21), the second reagent (22) and the third reagent (23) is fixedly connected to a second connecting pipe (24) for connection, and one end of the second connecting pipe (24) away from the first reagent (21), the second reagent (22) and the third reagent (23) is fixedly connected to a second water pump (25), and the output end of the second water pump (25) is fixedly connected to a second water outlet pipe (26), and the end of the second water outlet pipe (26) away from the second water pump (25) extends to the interior of the transparent container (31).
4. The device for detecting silicon dioxide in seawater according to claim 3, characterized in that: A first pipeline detector (16) for detecting the pipeline is provided at both ends of the first connecting pipeline (13) and the first water outlet pipe (15), and a second pipeline detector (27) for detecting the pipeline is provided at both ends of the second connecting pipeline (24) and the second water outlet pipe (26).
5. The device for detecting silicon dioxide in seawater according to claim 1, characterized in that: The output unit (4) includes a liquid discharge pipe (41) fixed to one end of the transparent container (31), and a valve (42) is fixedly connected to the outside of the liquid discharge pipe (41).
6. The device for detecting silicon dioxide in seawater according to claim 1, characterized in that: The detection light source groups (32) and the reaction receivers (33) are distributed in three groups correspondingly, and the detection light source groups (32) and the reaction receivers (33) are adapted to each other.
7. The device for detecting silicon dioxide in seawater according to claim 1, characterized in that: The temperature control device (6) includes a cooling block (61) and a refrigeration fin (62) installed on the inner wall of the installation box (5). The cooling block (61) and the refrigeration fin (62) are fixedly connected to the outside of a heat dissipation block (63) for enhancing heat dissipation. The heat dissipation block (63) on the side of the cooling block (61) away from the refrigeration fin (62) is fixedly connected to the outside of an internal fan (64). The heat dissipation block (63) on the side of the refrigeration fin (62) away from the cooling block (61) is fixedly connected to the outside of an external fan (65). The installation box (5) is also provided with a Peltier temperature measuring unit (51) for detecting the internal temperature of the installation box (5).