An in-situ nine-parameter water quality online detection device

Abstract

The utility model discloses an in-situ nine-parameter water quality online detection device, which aims to solve the problem that when the existing nine-parameter measurement method measures four water quality parameters, namely total phosphorus, total nitrogen, permanganate index and ammonia nitrogen, the measurement result obtained by the electrode method deviates greatly from the actual value and cannot reflect the real condition of the water quality well. The utility model comprises a detection device body, wherein the left cavity, the middle cavity and the right cavity for installing components are sequentially provided from left to right inside the detection device body, the detection device body is fixedly connected with a mounting sleeve distributed in an annular manner with equal spacing, and the mounting sleeve is fixedly connected with a five-parameter probe for detection inside, and the five-parameter probe includes a dissolved oxygen probe, a turbidity probe, a conductivity probe, a pH probe and a reserved probe position inside. The in-situ nine-parameter water quality online detection device has independent system modules, a compact structure and high integration, does not interfere with each other but cooperates with each other, and is protected by a secondary sealing coil, so as to have better waterproof performance.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality online detection, in particular to an in-situ nine-parameter water quality online detection device. Background Art

[0002] With the development of industrialization, water quality issues are becoming increasingly prominent, and more technical means are needed to detect the quality of water, to provide early warning and early intervention, to protect the healthy development of water resources from the source, to prevent the drawbacks of post-processing measures, and to nip the problem in the bud.

[0003] There are many methods for measuring nine parameters, each with its own advantages and disadvantages. For the nine parameters made by the pure probe method, the conventional five parameters of dissolved oxygen, turbidity, pH acidity, water temperature, and conductivity are measured by the electrode method with very small errors, which meet the national standard method and can be used in water quality testing projects. However, when measuring four water quality parameters of total phosphorus, total nitrogen, permanganate index and ammonia nitrogen, the measurement results of the electrode method deviate greatly from the actual values, which cannot reflect the true condition of the water quality well and are not the national standard method. The wet chemical method is used to measure four parameters and the electrode method is used to measure the conventional five parameters with high measurement accuracy. The measurement method is based on the national standard method. The wet chemical method is used to measure a single parameter with a measurement cycle time of 30-45 minutes, and the four-way parameter sequential measurement takes at least 2 hours. Utility Model Content

[0004] The utility model aims to provide an in-situ nine-parameter online water quality detection device which can realize the requirement of online measurement of the in-situ nine parameters through compact structural design and chemical analysis characteristics.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an in-situ nine-parameter water quality online detection device, comprising a detection device body, wherein the detection device body is provided with a left cavity, a middle cavity and a right cavity for installing components from left to right, the detection device body is fixedly connected with a mounting sleeve distributed in an annular manner with equal intervals, the mounting sleeve is fixedly connected with a five-parameter probe for detection, and the five-parameter probe includes a dissolved oxygen probe, a turbidity probe, a conductivity probe, a pH probe and a reserved probe position.

[0006] Furthermore, the dissolved oxygen probe, turbidity probe, conductivity probe, and pH probe all include a temperature probe for realizing the detection of the five parameters, and the end of the detection device body away from the five-parameter probe is provided with a waste liquid outlet connector, a reagent port connector, and a water sample inlet connector from left to right in sequence;

[0007] The detection device body is made of transparent acrylic acid-resistant and alkali-resistant material and is used to observe the interior of the cabin. The contact positions between the detection device body and the left cavity, the middle cavity and the right cavity are respectively sealed and protected by secondary sealing coils.

[0008] Furthermore, the hollow cavity includes a reaction group, a microcirculation pipeline and a control unit, the reaction group is used for heating, ultraviolet digestion and mixed chemical reactions, and the control unit is composed of a detector, a peristaltic pump and an integrated circuit.

[0009] Furthermore, the right cavity includes a battery and a GPRS data transmission module, the battery is used to store and supply electricity through solar energy, the GPRS data transmission module is used for communication between the upper computer and the lower computer to realize the remote data transmission function, the five-parameter probe, battery, GPRS data transmission module and control unit are electrically connected through a waterproof wire, the waterproof wire is used to provide power supply and signal communication, and the reagent group, pure water and waste liquid bag inside the left cavity are connected to the reaction group through a pipeline.

[0010] Furthermore, a probe rotating brush is rotatably connected to the lower end of the detection device body, and the probe rotating brush is used to clean the surface of the measuring probe.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The in-situ nine-parameter water quality online detection device has independent system modules, compact structure and high integration, which can work together without interfering with each other, and has secondary sealing coil protection and better waterproof performance;

[0013] 2. This in-situ nine-parameter water quality online detection device can measure up to nine parameters, with space for probe installation, which can be expanded as needed. The pipeline adopts a microcirculation system, with low overall energy consumption, less chemical reagents, and less environmental pollution;

[0014] 3. The in-situ nine-parameter water quality online detection device has a dry-wet separation design for the cabin, which is convenient for replacing accessories and simple operation and maintenance. It only takes 40 minutes to complete the measurement of all nine parameters, which is more than half shorter than the previous 2 hours. At the same time, the left, middle and right cabins are waterproofed by sealing rings and are independent of each other and can be taken out separately. The three cabins are independent, which is convenient for taking out to repair faults and replace reagents. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the disassembled structure of the gearbox of the utility model.

[0017] In the figure: 1. detection device body; 2. left cavity; 3. middle cavity; 4. right cavity; 5. installation sleeve; 6. waste liquid outlet connector; 7. reagent port connector; 8. water sample inlet connector; 11. probe brush; 22. reagent group; 23. pure water; 24. waste liquid bag; 31. reaction group; 32. microcirculation pipeline; 33. control unit; 41. battery; 42. GPRS data transmission module; 51. dissolved oxygen probe; 52. turbidity probe; 53. conductivity probe; 54. pH probe; 55. reserved probe position. DETAILED DESCRIPTION

[0018] 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 in 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.

[0019] See also Figure 1 and Figure 2 The utility model provides a technical solution: an in-situ nine-parameter water quality online detection device, including a detection device body 1, the detection device body 1 is provided with a left cavity 2, a middle cavity 3 and a right cavity 4 for installing components from left to right, the detection device body 1 is fixedly connected with a ring-shaped installation sleeve 5 with equal spacing, and the installation sleeve 5 is fixedly connected with a five-parameter probe for detection. The five-parameter probe includes a dissolved oxygen probe 51, a turbidity probe 52, a conductivity probe 53, a pH probe 54 and a reserved probe position 55. The reserved probe position 55 can be expanded as needed to facilitate the detection of different parameters. The reagent group 22, pure water 23 and waste liquid bag 24 in the cavity 2 are connected to the reaction group 31 in the hollow cavity 3 through pipelines. The liquids of the reagent group 22, pure water 23 and waste liquid bag 24 in the left cavity 2 enter the hollow cavity 3 for reaction under the drive of the device in the hollow cavity 3. At the same time, the waste liquid in the waste liquid bag 24 is discharged through the waste liquid discharge port joint 6, and the control unit 33 in the hollow cavity 3 is electrically connected to the battery 41 and the GPRS data transmission module 42 in the right cavity 4, and the reaction group 31 is interconnected with the microcirculation pipeline 32, so as to facilitate the overall liquid reaction and the overall cleaning of the pipeline and discharge of the waste liquid.

[0020] Reference Figure 1The dissolved oxygen probe 51, the turbidity probe 52, the conductivity probe 53, and the pH probe 54 all include a temperature probe for realizing the detection of the five parameters. The end of the detection device body 1 away from the five-parameter probe is provided with a waste liquid discharge port connector 6, a reagent port connector 7, and a water sample inlet connector 8 from left to right, which is convenient for connection with different parts to complete the detection and wastewater discharge; the five-parameter probe is electrically connected to the left cavity 2, the hollow cavity 3, and the right cavity 4 through a waterproof wire, and the waterproof wire is used to provide power supply and signal communication. The detection device body 1 adopts a transparent acrylic acid and alkali resistant material for observing the inside of the cabin. The contact positions of the detection device body 1 and the left cavity 2, the hollow cavity 3, and the right cavity 4 are respectively sealed and protected by secondary sealing coils, and the overall sealing effect is good. The lower end of the detection device body 1 is rotatably connected to a probe rotating brush 11, and the probe rotating brush 11 is used to clean the surface of the measuring probe.

[0021] Reference Figure 2 The left cavity 2 includes a reagent group 22, pure water 23 and a waste liquid bag 24. The reagent group 22 is composed of no less than one group of 100mL reagent bags, and each reagent bag is filled with different chemical reagents to assist in completing the four-parameter chemical reaction. The pure water 23 is used to clean the entire pipeline after a single measurement. The waste liquid bag 24 is used to collect waste liquid that pollutes the environment after the reaction. Ordinary waste liquid is directly discharged into the water body through the drain port. The reagent group 22 provides reagents for the four parameters to participate in the reaction. Each reagent is separately loaded into a 100mL reagent bag. The hollow cavity 3 includes a reaction group 31 and a microcirculation pipeline. 32 and a control unit 33, the reaction group 31 is used for heating, UV digestion and mixed chemical reactions, the control unit 33 is composed of a detector, a peristaltic pump and an integrated circuit, the micro solenoid valve and the peristaltic pump in the wet chemical method deliver the reagents into the analysis system, the auxiliary heating system and the UV digestion system are used to achieve the determination of four parameters: total phosphorus, total nitrogen, ammonia nitrogen and permanganate index, the right cavity 4 includes a battery 41 and a GPRS data transmission module 42, the battery 41 is used to store and supply electricity through solar energy, and the GPRS data transmission module 42 is used for communication between the upper computer and the lower computer to achieve remote data transmission function.

[0022] Working principle: First, the battery 41 is charged and powered by solar energy. The reagent group 22 provides reagents with four parameters involved in the reaction. Each reagent is loaded into a reagent bag with a volume of 100 mL. The reagent group 22, pure water 23 and waste liquid bag 24 are placed in the left cavity 2. The battery 41 and GPRS data transmission module 42 are placed in the right cavity 4. The reaction group 31, microcirculation pipeline 32 and control unit 33 are placed in the middle cavity 3. The main purpose is to realize the extraction and discharge of reagents and complete the chemical reaction. The left, middle and right cabins are waterproofed by sealing rings and are independent of each other and can be taken out separately. When the pure water 23 decreases during the chemical reaction, the amount of waste liquid increases, which is beneficial to the balance of the cabin. The three cabins are independent of each other, which is convenient for smooth removal for troubleshooting and replacement of reagents.

[0023] Working process of measuring five conventional parameters using electrode method:

[0024] Put the probe part of the instrument into the water to be measured, start the power supply, and start the working mode of the five-parameter sensor. According to the five-parameter measurement principle based on the electrode method, the sensor can output all the data within 30 seconds on average. The middle probe rotating brush 11 is used to clean the optical mirror of the sensor to maintain cleanliness, reduce the adhesion of sludge or impurities, affect the measurement accuracy, and reduce the measurement error. The brush installation working frequency is set according to the cleanliness of the water body, which can greatly reduce the maintenance frequency of the operation and maintenance service department and improve work efficiency;

[0025] The working process of measuring four parameters of total phosphorus, total nitrogen, ammonia nitrogen and permanganate index by wet sliding method:

[0026] The wet chemical method is to add different chemical reagents to the substance to be tested, and then use a series of chemical methods such as auxiliary heating, UV light digestion and peristaltic pump mixing. After a chemical reaction in a circulation system, a color-developing substance is finally generated in the colorimetric cell. By lighting up the light source with a wavelength sensitive to the display substance at one end of the cuvette, the color-developing substance in the cuvette is illuminated, and the light receiver at the other end obtains the optical density value according to the light transmittance or light absorption rate. Different concentrations correspond to different optical density values. Combined with Lambert-Beer's law, the algorithm formula is deduced through the logical correspondence between different concentrations and optical density values, so as to obtain different concentration values ​​of the substance to be tested;

[0027] First, control the valve according to the measurement requirements. Before preparing for measurement, open the pure water pipeline valve to clean the entire pipeline. After cleaning, close the pure water valve and open the water sample valve. The water sample enters the test state. The chemical properties of the water sample to be tested select reagents from the reagent group 22 to participate in the chemical reaction. Use different valves to control different reagents to enter the microcirculation pipeline 32 through the reagent port connector 7. All reagents are mixed and reacted in the peristaltic pump. During the process, the ultraviolet digestion or heating auxiliary function is started according to the characteristics of the chemical reaction. The substances that are evenly mixed and have a sufficient reaction time are sent to the colorimetric dish, and the corresponding light source is turned on. According to the transmittance or absorption rate characteristics of the light, the ratio algorithm relationship of the substance to be tested is found to obtain the concentration of the substance to be tested.

[0028] Finally, all measured data are returned to the client receiving end through the control unit 33, the polluted waste liquid is collected in the waste liquid bag 24, and the ordinary waste liquid is discharged into the water. The measurement cycle is 40 minutes. After the measurement is completed, wait for instructions to proceed to the next measurement cycle.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An in-situ nine-parameter water quality online detection device, comprising a detection device body (1), characterized in that: The detection device body (1) is provided with a left cavity (2), a middle cavity (3) and a right cavity (4) for mounting components from left to right in sequence. The detection device body (1) is fixedly connected with a mounting sleeve (5) distributed in an annular manner with equal spacing. A five-parameter probe for detection is fixedly connected inside the mounting sleeve (5). The five-parameter probe includes a dissolved oxygen probe (51), a turbidity probe (52), a conductivity probe (53), a pH probe (54) and a reserved probe position (55).

2. The in-situ nine-parameter water quality online detection device according to claim 1, characterized in that: The dissolved oxygen probe (51), turbidity probe (52), conductivity probe (53), and pH probe (54) all include a temperature probe for realizing detection of the five parameters. The end of the detection device body (1) away from the five-parameter probes is provided with a waste liquid outlet connector (6), a reagent port connector (7), and a water sample inlet connector (8) in sequence from left to right; The detection device body (1) is made of a transparent acrylic acid- and alkali-resistant material and is used to observe the interior of the cabin. The contact positions between the detection device body (1) and the left cavity (2), the middle cavity (3) and the right cavity (4) are respectively sealed and protected by secondary sealing coils.

3. The in-situ nine-parameter water quality online detection device according to claim 2 is characterized in that: The left cavity (2) includes a reagent group (22), pure water (23) and a waste liquid bag (24). The reagent group (22) is composed of no less than one group of 100 mL reagent bags, and each reagent bag is filled with different chemical reagents to assist in completing the four-parameter chemical reaction. The pure water (23) is used to clean the entire pipeline after a single measurement. The waste liquid bag (24) is used to collect part of the waste liquid that pollutes the water environment after the reaction. Ordinary waste liquid is directly discharged into the water body through the discharge port.

4. The in-situ nine-parameter water quality online detection device according to claim 3 is characterized in that: The hollow cavity (3) comprises a reaction group (31), a microcirculation pipeline (32) and a control unit (33). The reaction group (31) is used for heating, ultraviolet digestion and mixed chemical reactions. The control unit (33) is composed of a detector, a peristaltic pump and an integrated circuit.

5. The in-situ nine-parameter water quality online detection device according to claim 4 is characterized in that: The right cavity (4) includes a storage battery (41) and a GPRS data transmission module (42). The storage battery (41) is used to store and supply electricity through solar energy. The GPRS data transmission module (42) is used for communication between the upper computer and the lower computer to realize the remote data transmission function. The five-parameter probe, the storage battery (41), the GPRS data transmission module (42) and the control unit (33) are electrically connected through a waterproof wire, and the waterproof wire is used to provide power supply and signal communication. The reagent group (22), pure water (23) and the waste liquid bag (24) in the left cavity (2) are connected to the reaction group (31) through a pipeline.

6. The in-situ nine-parameter water quality online detection device according to claim 5, characterized in that: The lower end of the detection device body (1) is rotatably connected to a probe rotating brush (11), and the probe rotating brush (11) is used to clean the surface of the measuring probe.

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