Water hardness monitoring device based on sodium ion exchanger and monitoring method

Abstract

This invention belongs to the technical field of effluent hardness monitoring in water treatment devices, and specifically discloses an effluent hardness monitoring device and method based on a sodium ion exchanger. The device comprises a sample water adjustment and switching system, a sample water metering and mixing system, a reagent quantitative addition system, a supplementary lighting and standard colorimetric plate system, a video monitoring system, and a control system. This invention uses automated and information-based methods to simulate the manual on-site testing process for effluent hardness, replacing manual on-site operation. It achieves physical isolation between operators and the risk of chemical corrosion on-site, facilitating rapid judgment of whether the sodium ion exchanger effluent hardness meets standards based on sample water color, thereby enabling appropriate decision-making. This provides technical support for "unattended, remote monitoring" of production operations, and simultaneously determines the optimal cleaning time endpoint for sodium ion exchanger "regeneration," reducing water consumption.

Description

Technical Field

[0001] This invention belongs to the field of water hardness monitoring technology for water treatment devices, and particularly relates to a water hardness monitoring device and method based on a sodium ion exchanger. Background Technology

[0002] The core module of the feedwater treatment unit for oilfield steam injection boilers is a sodium ion exchanger, which is used for softening (hardness removal) of raw water. This means removing calcium and magnesium ions that can form hardness in the water to produce softened water, preventing scale buildup on boiler tubes and accidents such as "tube bursting" or "tube cracking". Sodium ion exchangers typically consist of two groups: one group (e.g., group A) is in operation, while the other group (e.g., group B) is in "regeneration" standby. They operate alternately, so the working states of a sodium ion exchanger are divided into three types: "operation," "regeneration," and "standby." Each group (e.g., group A) has two resin tanks (e.g., primary tank A1 and secondary tank A2). The primary tank A1 plays a major role in removing calcium and magnesium ions from the raw water that can form "hardness." The secondary tank acts as a safety net, preventing "hardness leakage" in the effluent. After a group (e.g., group A) has been operating for a period of time, it loses its ability to remove hardness and needs to be "regenerated." Sodium ion exchanger "regeneration" involves passing dilute brine (8-12%) through the resin layer to react with the resin particles that have lost their exchange capacity, restoring their water treatment ability. This process mainly consists of three steps: backwashing, salt inlet, and rinsing. Each step is completed automatically at a pre-set time. Currently, the hardness of the sodium ion exchanger effluent is monitored using an online hardness monitor. However, this cannot guarantee that the hardness will meet the requirements at the end of the "regeneration" cleaning process or the boiler feedwater hardness during operation. Therefore, the measures taken are to conduct regular on-site manual testing and hardness comparison verification. If the hardness test result of the sample water is a standard sky blue, it indicates that the hardness is qualified; if the hardness test result of the sample water is purple or purplish-red, it indicates that the hardness is unqualified. This indicates that the "regeneration" cleaning has not reached the end point and the cleaning time needs to be extended; or that the boiler feedwater hardness is unqualified and operation needs to be stopped, and the "standby" group needs to be used to supply water to the boiler. The daily manual on-site testing of the hardness of the sodium ion exchanger outlet water poses a risk of chemical corrosion and is detrimental to occupational health. It also increases the labor intensity of employees, hinders human resource optimization, and raises labor costs for production operations. Under the current "unmanned, remote monitoring" production operation model, this has become a bottleneck to the company's information-based production. This practical problem urgently needs to be solved. If the sodium ion exchanger in the regeneration group has reached the required hardness after cleaning, but is still cleaned according to the set cleaning time, a large amount of water resources are wasted, leading to increased production costs. If the boiler feedwater hardness is not up to standard and the boiler continues to operate, it will cause scale buildup on the boiler tubes, resulting in accidents such as "tube bursts" and "tube cracks." Publication No. CN114965452A discloses a machine vision detection method and device for boiler feedwater hardness. The device includes a first solenoid valve, a second solenoid valve, a third solenoid valve, a backlight, a camera, a measuring cell, a check valve, a flow meter, a buffer solution bottle, and a colorimetric reagent bottle. This invention also proposes a method for controlling the colorimetric reaction, increasing the acquisition of information on the hardness detection colorimetric reaction process, making the evaluation indicators more comprehensive and diversified. Furthermore, this invention provides a process for extracting, regressing, and predicting boiler feedwater sample data. This invention improves the detection accuracy, anti-interference ability, and stability repeatability of the boiler feedwater hardness detection device. For the same boiler feedwater, repeated detection yields stable water hardness with small fluctuations and strong stability, reducing the likelihood of false detections. Existing technologies monitor hardness values ​​and have complex structures, failing to meet the purpose of remote visual verification of sodium ion exchanger effluent hardness colorimetrically as required by this invention. Publication No. CN117185506A discloses an intelligent control system for boiler feedwater hardness, including an inlet tank, a water processor, a water hardness detection device, an outlet tank, a control system, and a water treatment auxiliary chemical tank. The inlet tank, water processor, water hardness detection device, and outlet tank are connected in sequence. The control system and the water treatment auxiliary chemical tank are connected to the water processor. The control system is also connected to the water hardness detection device and the water treatment auxiliary chemical tank. This invention, by setting a water hardness detection device between the water processor and the outlet tank, can monitor the water hardness in real time. Furthermore, because a flow channel and an auxiliary channel are set up for the water hardness detection device, most of the water flows along the flow channel to the outlet tank during the detection process, which does not affect the normal operation of the boiler drainage. Additionally, a shaft-shaped sensor head inserted in the auxiliary channel is used to measure water hardness in real time. This prior art falls under the category of hardness control and cannot meet the requirements of this invention. CN111252853A discloses a control system and method for automatically controlling the hardness of water produced by a sodium ion exchanger. This invention belongs to the field of industrial softened water application technology. It discloses a control system and method for automatically controlling the hardness of water produced by a sodium ion exchanger. After a power outage and subsequent power restoration, the sodium ion exchanger continues to operate according to the operating steps and time before the power outage. It features a softened water storage tank level detection function; when the water level exceeds the limit, an alarm message is displayed, and the system shuts down. A hardness composite electrode is used to automatically detect the hardness of the sodium ion exchanger outlet water. Based on the detection results, a corresponding control algorithm is used to automatically adjust the operating time of the bed loosening, regeneration, and cleaning steps, ensuring that the hardness of the produced water meets the softened water hardness index and that the sodium ion exchanger operates in an economical and efficient state. This invention is applicable to sodium ion exchangers where pipeline switching for each step is achieved through multi-channel valves or solenoid valves, enabling fault detection of each solenoid valve's circuit. When a valve circuit fault occurs, the system shuts down and displays an alarm message. Existing technology involves a rigid control process for sodium ion exchangers and cannot meet the requirements of this invention. CN112305185A discloses an online monitoring system and method for feedwater hardness. The system includes a data acquisition device, a data management device, a data monitoring device, and a smart terminal. The data acquisition device collects the feedwater hardness in the boiler feedwater pipeline and transmits it to the data management device. The data management device transmits the feedwater hardness collected and transmitted by the data acquisition device to the data monitoring device. The data monitoring device determines the feedwater hardness level and sends the feedwater hardness to the smart terminal. This invention obtains the boiler feedwater hardness through the data acquisition device, uploads the feedwater hardness to the data monitoring device through the data management device, determines the boiler feedwater hardness level through the data monitoring device, and sends data information to the user's smart terminal. This enables long-distance transmission of online monitoring results and alarm signals, promptly alerting relevant personnel for handling. Existing technologies fall under the category of online feedwater hardness monitoring devices and do not meet the requirements of this invention. In summary, the technical solutions, technical problems to be solved, and beneficial effects of the above-disclosed technologies are all different from those of the present invention. Regarding the more technical features, technical problems to be solved, and beneficial effects of the present invention, the above-disclosed technical documents do not provide any technical inspiration. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a device and method for monitoring the hardness of effluent based on a sodium ion exchanger, thereby resolving the issues raised in the background section.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a water hardness monitoring device based on a sodium ion exchanger, comprising: a sample water switching system, a sample water metering and mixing system, a reagent quantitative addition system, a supplementary light and standard colorimetric plate system, a video monitoring system, and a control system, etc. The sample water switching system and the reagent quantitative addition system simultaneously add raw materials into the sample water metering and mixing system. The two raw materials are mixed by the sample water metering and mixing system. The mixed raw materials are compared by a supplementary light and a standard color comparison plate system. The comparison data is captured and transmitted by a video monitoring system and a control system.

[0005] Furthermore, the sample water switching system includes a raw water tank, an inlet pump, a primary tank of a group A sodium ion exchanger, a secondary tank of a group A sodium ion exchanger, an oilfield steam injection boiler, a filter one, a filter two, an electric regulating valve one, an electric regulating valve two, and a four-way connector. The outlet of the raw water tank is connected to an inlet pump, the outlet of the inlet pump is connected to a primary tank of a group A sodium ion exchanger, the outlet of the primary tank of the group A sodium ion exchanger is connected to a secondary tank of the group A sodium ion exchanger, the outlet of the secondary tank of the group A sodium ion exchanger is connected to an oilfield steam injection boiler via a pipeline, a "regeneration" cleaning drain valve is connected to the outside of the pipeline between the secondary tank of the group A sodium ion exchanger and the oilfield steam injection boiler, a filter one is connected to the pipeline between the secondary tank of the group A sodium ion exchanger and the oilfield steam injection boiler, a filter two is connected to the outside of the pipeline between the secondary tank of the group A sodium ion exchanger and the oilfield steam injection boiler, located on the side of filter one, an electric regulating valve two is connected to one end of filter two via a pipeline, an electric regulating valve one is connected to one end of filter two via a pipeline, and a four-way connector is connected to the outlet ends of electric regulating valve one and electric regulating valve two via a pipeline.

[0006] Furthermore, the sample water metering and mixing system includes: a conical flask, a conical flask stopper, a water inlet pipe, a vent, a 100mL graduation mark, a conical flask overflow pipe, a conical flask drain pipe, a magnetic stir bar, a stirring motor box, a speed control knob, a solenoid valve one, a solenoid valve two, a water receiving tray, a guide pipe, a fixed arm, a drain tank, and a drain pump. The conical stopper is connected to the outlet pipe of the four-way connector. An inlet hole is located at the top of the conical stopper, and the outlet pipe of the four-way connector is located inside the inlet hole. An vent hole is located on one side of the top of the conical stopper. A conical bottle is fitted around the conical stopper, and a 100mL graduation mark is provided on the outer surface of the conical bottle. An overflow pipe is located at the top of the conical stopper, and one end of the overflow pipe is connected to a solenoid valve. A drain pipe is connected to the bottom of the conical bottle, and one end of the drain pipe is connected to a solenoid valve. A drain tank is connected to both solenoid valves, and a drain pump is connected to one end of the drain tank via a pipe. A magnetic stir bar is located inside the conical bottle, and a stirring motor box is located at the bottom of the conical bottle. A speed control knob is located at one end of the stirring motor box. A water receiving tray is located at the bottom of the conical bottle, and a guide pipe is located at the bottom of the water receiving tray. A fixing arm is located on the outside of the conical bottle.

[0007] Furthermore, the drug metering system includes a buffer solution bottle, a 0.5% chrome black T solution bottle, a peristaltic pump one, a peristaltic pump two, a stepper motor one, and a stepper motor two; The other two feed ports of the four-way connector are respectively connected to peristaltic pump one and peristaltic pump two through pipes. Peristaltic pump one and peristaltic pump two are respectively connected to check valve one and check valve two through pipes. A buffer solution bottle is set on the outside of check valve one, and a 0.5% chrome black T solution bottle is set on the outside of check valve two. The drive end of peristaltic pump one is connected to stepper motor one, and the drive end of peristaltic pump two is connected to stepper motor two.

[0008] Furthermore, the supplementary lighting and standard colorimetric system includes a standard colorimetric panel, a white colorimetric panel, a sky blue colorimetric panel, a supplementary lighting, a corrugated pipe support frame, and a network camera; A standard colorimetric plate is installed above the water tray, located on one side of the conical flask. One end of the standard colorimetric plate is white, and the other end, near the white side, is sky blue. A corrugated pipe support frame is installed on one side of the water tray, and a supplementary light is installed on one side of the corrugated pipe support frame. A network camera is installed above the water tray, located on one side of the standard colorimetric plate.

[0009] Furthermore, the video surveillance system and control system include components such as a component box, signal cables and quick-connect plugs, and a control box; A component box is located below the stirring motor box. A signal cable is embedded in one end of the component box, and the other end of the signal cable is connected to a control box. The control system consists of a PLC, a touch screen, a power supply, and relays.

[0010] Furthermore, the conical flask is equipped with an anti-sway component, which includes an annular airbag, a fixing plate, an elastic plate, a conical counterweight, and an inflation mechanism. The annular airbag is disposed inside the conical flask, and its diameter when fully inflated matches the diameter of the 100ml mark on the conical flask. There are two fixing plates, which are semi-circular in shape and symmetrically fixed to the top of the annular airbag. The elastic plate is connected between the two fixing plates. The conical counterweight is disposed at the bottom axis of the annular airbag, and the maximum diameter of the top of the conical counterweight is smaller than the opening diameter of the conical flask. The top of the conical counterweight is fixed to the bottom center of the elastic plate by a pull rope, and the weight of the conical counterweight is less than the buoyancy generated by the annular airbag when fully inflated. The inflation mechanism is connected to the top of the annular airbag and is used to inflate the annular airbag.

[0011] Furthermore, the inflation mechanism includes a hose, a hollow rod, a rubber stopper, and a pressure ball. The hose is T-shaped, with its bottom ends symmetrically connected to the top of the annular air bladder. The hollow rod is connected to the top of the hose. A through-hole is provided at the center of the top of the conical stopper, and the air rod is inserted through the through-hole. The rubber stopper is fixedly sleeved on the hollow rod and inserted into the bottom opening of the through-hole. The pressure ball is detachably connected to the top of the hollow rod. A fixing ring is fixedly sleeved at the bottom of the vertical section of the hose, and the fixing ring is fixedly connected to the center of the top of the elastic sheet.

[0012] Furthermore, the outer side of the annular airbag is evenly distributed with anti-slip protrusions, and the anti-slip protrusions are made of soft rubber.

[0013] A monitoring method using the above-mentioned sodium ion exchanger-based effluent hardness monitoring device includes the following steps: Step 1, Automatic Sampling Step: The sample water switching system is activated through the control system to quantitatively collect a predetermined volume of the sample water to be tested into the conical flask; Step 2, Automatic Dosing and Color Development: The reagent quantitative addition system is started by the control system, and a predetermined amount of pH buffer solution and Eriochrome Black T indicator are added to the conical flask in sequence. Then, the magnetic stirring system is started to stir and mix the mixture to induce a color reaction. Step 3, Image Acquisition Step: After the stirring and mixing process, turn on the supplementary light and acquire the image information of the color-developed sample water through the video monitoring system; Step 4, Remote Verification and Decision-Making Step: Compare the color of the sample water in the image information with the pre-stored standard color; Step 5: Judgment: If the color matches the standard sky blue, the water hardness is deemed acceptable; if the color matches purple or purplish-red, the water hardness is deemed unacceptable, and a control command is generated.

[0014] The technical effects and advantages of this invention are as follows: 1. This invention uses automated and information-based methods to simulate the manual on-site testing process of water hardness, replacing manual on-site operation and achieving physical isolation between operators and the risk of chemical corrosion on-site. It facilitates quick judgment of whether the hardness of the sodium ion exchanger outlet water meets the standard based on the color of the sample water, thereby making disposal decisions and providing technical support for "unattended operation and remote monitoring" of production operations. 2. This invention enables remote video transmission of the sample water monitoring process and colorimetric results via a network camera, facilitating remote visualization and colorimetric verification of the hardness of the sodium ion exchanger effluent; thereby determining the optimal "regeneration" cleaning endpoint time, reducing raw water consumption, and lowering production costs; at the same time, it ensures that the boiler feedwater hardness is up to standard, prevents boiler tube scaling, and eliminates accidents such as "tube bursting" and "tube cracking". 3. By combining the camera module with a stable clamping and fixing system, continuous and automatic sampling, mixing and image acquisition are realized under unattended operation on site. Operators can observe the mixing effect and color development in real time in the remote monitoring center and make interpretations. This greatly reduces the frequency of personnel going to the site for sampling, reduces labor intensity and maintenance costs, and is especially suitable for distributed sites or harsh working conditions. 4. This invention goes beyond a simple, stable approach, constructing a dual-mixing enhancement system that combines macroscopic and microscopic elements. Macroscopically, the angle of attack of the vanes is changed through centrifugal blocks, racks, and gear transmissions, optimizing the main flow field. Microscopically, the opening of the flow channel is adjusted by a moving plate, generating precise local jets and disturbances. The synergistic effect of both achieves precise control over fluid shear force and turbulence intensity, resulting in not only faster mixing speed but also extremely high mixing uniformity, making it particularly suitable for high-precision colorimetric analysis. 5. By incorporating an anti-swaying component, when the magnetic stirrer agitates the sample water in the conical flask, the annular airbag can press down on the top edge of the sample water under the pulling force of the conical counterweight, thus keeping the liquid surface at the top edge of the sample water in a stable state. As a result, when the sample water flows out through the overflow pipe of the conical flask, the outflowing sample water can maintain a stable flow state, thereby ensuring the accuracy of the sample water volume. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the effluent hardness monitoring device based on a sodium ion exchanger in this invention; Figure 2 This is a schematic diagram of the structure of the device box, fixing arm, supplementary light, and colorimetric plate in this invention; Figure 3 This is a schematic diagram of the water receiving tray in this invention; Figure 4 This is a schematic diagram of the control box structure in this invention; Figure 5 This is a schematic diagram of the logic control for water hardness titration colorimetric determination in this invention; Figure 6 This is a schematic diagram of the conical flask cleaning logic control in this invention; Figure 7 This is a three-dimensional schematic diagram of the conical flask, stirring motor box, and water receiving tray in this invention; Figure 8 This is a three-dimensional sectional view of the conical flask in this invention; Figure 9 This is a three-dimensional schematic diagram of the anti-sway component in this invention; Figure 10 This is a three-dimensional schematic diagram of the hollow rod, rubber stopper, and pressure ball in this invention.

[0016] In the diagram: 1. Raw water tank; 2. Inlet pump; 3. Group A sodium ion exchanger primary tank; 4. Group A sodium ion exchanger secondary tank; 5. Oilfield steam injection boiler; 6. Filter 1; 7. Filter 2; 8. Electric regulating valve 1; 9. Electric regulating valve 2; 10. Four-way connector; 11. Conical flask; 11-1. Conical flask stopper; 11-1-1. Inlet pipe hole; 11-1-2. Vent hole; 11-2. 100mL graduation mark; 11-3. Conical flask overflow pipe; 11-4. Conical flask drain pipe; 12. Magnetic stir bar; 13. Stirring motor box; 14. Speed ​​control knob; 15. Solenoid valve 1; 16. Solenoid valve 2; 17. Water receiving tray; 17-1. Guide pipe; 18. Fixing arm; 19. Standard colorimetric plate; 19-1. 19-2, White colorimeter; 20, Sky blue colorimeter; 20, Fill light; 20-1, Corrugated pipe support frame; 21, Network camera; 22, Drainage tank; 23, Drainage pump; 24, Buffer solution bottle; 25, 0.5% Chrome Black T solution bottle; 26, Peristaltic pump one; 26-1, Stepper motor one; 27, Peristaltic pump two; 27-1, Stepper motor two; 28, Component box; 29, Signal cable and quick connector; 30, Control box; 31, One-way valve one; 32, One-way valve two; 33, "Regeneration" cleaning drain valve; 34, Annular airbag; 35, Fixing plate; 36, Elastic plate; 37, Conical counterweight; 38, Flexible hose; 39, Hollow rod; 40, Rubber stopper; 41, Pressure ball; 42, Fixing ring; 43, Anti-slip protrusion. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0018] Example 1 Please see Figures 1 to 10 This embodiment provides a water hardness monitoring device based on a sodium ion exchanger, comprising a sample water switching system, a sample water metering and mixing system, a reagent quantitative addition system, a supplementary lighting and standard colorimetric plate system, a video monitoring system, and a control system. It uses automated and information-based methods to simulate the on-site manual operation of sample water hardness testing, replacing manual on-site operation. It is convenient to quickly determine whether the hardness of the sodium ion exchanger effluent meets the standard by comparing the sample water color, thereby making a disposal decision.

[0019] First, the electric regulating valve 8 or the electric regulating valve 9 switches the four types of sample water to be monitored from the outlet of the sodium ion exchanger of group A or B under different operating conditions and adjusts the flow rate according to the 30% opening degree set by the valve. In 10 seconds, 100 mL of sample water can be quantitatively added to the conical flask 11 through the four-way connector 10.

[0020] The parameters of the electric regulating valve 8 and the electric regulating valve 9 are as follows: power supply DC24V, nominal diameter DN15, and engineering pressure PN0.8MPa.

[0021] Among them, the sample water pipelines at the front end of the electric regulating valve 8 and the electric regulating valve 9 are equipped with filters 6 and 7 to prevent impurities from clogging the pipelines.

[0022] Among them, the conical flask 11 is made of crystal glass, which is highly transparent, resistant to acid, alkali and salt corrosion, and wear-resistant.

[0023] The conical bottle 11 is secured by a fixing arm 18 to prevent displacement. The fixing arm 18 is bolted to the component box 28.

[0024] The conical bottle 11 has a thin wall and a thick bottom. There is a drain hole in the center of the bottom that connects to the drain pipe 11-4 and is then connected to the drain solenoid valve 16. The drain pipe 11-4 has a diameter of 10mm and a 15-degree slope to facilitate the discharge of cleaning water and residual water.

[0025] The conical flask 11 has a conical stopper 11-1 at its mouth. The conical stopper 11-1 has two holes. One is a water inlet 11-1-1, which is used to add sample water and reagents. It is connected by a four-way connector 10. The other is a vent 11-1-2, which keeps the pressure inside the flask at atmospheric pressure to prevent negative pressure from forming. The conical bottle 11 has a water receiving tray 17 and a guide pipe 17-1 at its bottom, which can prevent water from overflowing from the conical bottle 11.

[0026] The conical flask 11 has a 100mL graduation line 11-2 on its body, which is flush with the lower edge of the overflow tube 11-3 of the conical flask. The overflow tube has a diameter of 8mm and is sloped at 15 degrees to achieve overflow, accurately measuring the volume of the water sample to be monitored.

[0027] When 100 mL of sample water is added quantitatively to conical flask 11, it is connected to solenoid valve 15 through overflow pipe 11-3 located on the body of conical flask 11. Solenoid valve 15 opens for 5 seconds to overflow and then closes, so that 100 mL of sample water to be monitored can be accurately measured.

[0028] The conical bottle 11 is equipped with a conical bottle drain pipe 11-4 at the bottom for draining water from inside the conical bottle 11.

[0029] The parameters of solenoid valve 15 are as follows: power supply DC24V, engineering pressure PN0.8MPa, and flow diameter 8mm.

[0030] After the liquid surface in conical flask 11 has been still for 3 seconds, the cold white light source supplement lamp 20 is lit to facilitate video monitoring of whether the addition of the reagent is normal and whether it is mixed and colored.

[0031] The supplementary light 20 is mounted on the top cover of the device box 28 using a corrugated pipe support frame 20-1, which facilitates adjustment of the illumination angle.

[0032] Stepper motor 27-1 drives peristaltic pump 27. After 8 seconds of operation, 4 mL of buffer solution is quantitatively added from buffer solution bottle 24 to conical flask 11, adjusting the pH of the sample water to 10±0.1.

[0033] The peristaltic pump 27, which is inserted into the buffer solution bottle 24, is equipped with a check valve 31 at its suction port to prevent backflow of the solution and air intake, thus ensuring reliable addition of the solution.

[0034] The quantitative addition of 4 mL of pH=10 buffer solution during the adjustment process is as follows: Stepper motor power supply DC24V; Peristaltic pump 27 is a 2-wheel set with a pump tube diameter of 3.5 mm and a flow rate of 0.5 mL-10 mL / s; When the flow rate is adjusted to 0.5 mL / s, peristaltic pump 27 is turned on for 8 seconds, which can inject 4 mL of buffer solution into conical flask 11 to adjust the pH value of the sample water to 10±0.1.

[0035] Stepper motor 26-1 drives peristaltic pump 26. After 4 seconds of operation, 0.2 mL of 0.5% Chrome Black T solution is quantitatively added from bottle 25 to conical flask 11.

[0036] The peristaltic pump 27, which is inserted into the 0.5% Chrome Black T solution bottle 25, is equipped with a check valve 32 at its suction port to prevent backflow of the solution and air intake, thus ensuring reliable addition of the drug.

[0037] The process of quantitatively adding 0.2 mL of 0.5% Chrome Black T reagent and adjusting the parameters is as follows: the stepper motor is powered by DC 24V; the peristaltic pump-26 is a 3-wheel assembly with a pump tube diameter of 2 mm and a flow rate of 0.05 mL-5 mL / s; when the flow rate is adjusted to 0.05 mL / s, the peristaltic pump-26 is turned on for 4 seconds, which will inject 0.2 mL of 0.5% Chrome Black T reagent into the conical flask 11.

[0038] The magnetic stir bar 12, placed at the bottom of the conical flask 11, rotates with the help of the magnetic field generated by the stirring motor box 13 placed on the device box 28. It can mix the sample water and medicine solution and develop color in 15 seconds, and then stand still.

[0039] Among them, the magnetic stir bar 12 is cylindrical, with a diameter of 8mm and a length of 30mm.

[0040] The parameters of the magnetic stir bar 12 and the stirring motor box 13 are as follows: DC24V power supply for the drive motor, speed 100-2000 rpm, and magnetic force range 15-50 mm. When the drive motor speed is set to 300 rpm, the sample water and the drug solution can be mixed and color developed in 15 seconds.

[0041] The stirring motor box 13 that generates the magnetic field can adjust the speed of the magnetic stir bar 12 via the speed control knob 14.

[0042] Among them, the component box 28 is an independent box, which contains an electric regulating valve 1 8, an electric regulating valve 2 9, a solenoid valve 1 15, a solenoid valve 2 16, a peristaltic pump 1 26 and its stepper motor 1 26-1, a peristaltic pump 2 27 and its stepper motor 2 27-1, a buffer solution bottle 24, a 0.5% chrome black T solution bottle 25, latex tubing, etc. It is connected to the control box 30 using a signal cable and a quick connector 29 for easy installation and maintenance.

[0043] Since the supplementary light 20 is always on, the network camera 21 can observe and compare the difference between the color of the sample water in the conical flask 11 and the standard colorimetric plate 19, thereby verifying whether the hardness meets the standard.

[0044] The standard colorimetric plate 19 is installed at the rear of the conical flask 11 and fixed on the device box 28.

[0045] The standard color chart 19 is vertically divided into two colors: standard white (RGB: 255, 255, 255; HEX: FFFFFF) and standard sky blue (RGB: 0, 128, 255; HEX: 0080FF). Both colors are standard colors, which facilitates comparison of the color of the sample water in the conical flask 11.

[0046] The video monitoring system uses 21 network cameras to remotely transmit video images of the sample water monitoring process and colorimetric results, facilitating remote visualization and colorimetric verification of the hardness of the sodium ion exchanger outlet water. If the sample water hardness monitoring result is a standard sky blue, it indicates that the hardness is qualified; if the sample water hardness monitoring result is purple or purplish-red, it indicates that the hardness is unqualified. This further indicates that the "regeneration" cleaning has not reached its end and the cleaning time needs to be extended; or that the boiler feedwater hardness is unqualified, requiring the system to be shut down and the "standby" group to supply water to the boiler to prevent scale buildup on the boiler tubes and accidents such as "tube bursting" or "tube cracking".

[0047] The control system consists of a PLC, a touch screen, a power supply, and relays. It realizes logic control, parameter setting, operation and debugging. The PLC, touch screen, power supply, and relays are installed in an independent control box 30.

[0048] Example 2: Based on Example 1, this example provides the cleaning process for the conical flask 11 of the present invention, and completes the standby actions after cleaning the conical flask 11, including the following steps: This process can be performed once the water hardness colorimetric monitoring is completed, in preparation for the next test.

[0049] When the remote command "Conical flask 11 is cleaned and ready for use" is issued, the supplementary light 20 is turned off.

[0050] The conical flask 11 drain solenoid valve 2 16 opens for 10 seconds to drain residual water, then closes.

[0051] The conical bottle 11 has a thin wall and a thick bottom. There is a drain hole in the center of the bottom that connects to the drain pipe 11-4 and is then connected to the drain solenoid valve 16. The drain pipe 11-4 has a diameter of 10mm and a 15-degree slope to facilitate the discharge of cleaning water and residual water.

[0052] The parameters of solenoid valve 16 are: power supply DC24V, engineering pressure PN0.8MPa, and flow diameter 10mm. Testing showed that it can completely drain residual water from conical flask 11 in 10 seconds.

[0053] The electric regulating valve 8 or electric regulating valve 9, used to control the secondary outlet sample water of group A or group B in the operation state of the sodium ion exchanger, adjusts the flow rate according to the 30% opening degree set by the valve. 150mL of sample water can be quantitatively added to the conical flask 11 through the four-way connector 10 for rinsing in 15 seconds.

[0054] Rotate the magnetic stir bar 12 for 10 seconds to clean the conical flask 11.

[0055] Open the solenoid valve 16 of the conical bottle for 15 seconds to drain the cleaning water.

[0056] Repeat the above actions and steps to clean the conical flask 113 times, and the conical flask 11 will be ready for use.

[0057] The drainage tank 22 is used to collect the water discharged through solenoid valve 15 and solenoid valve 26, and then discharge it through the drainage pump 23.

[0058] Example 3: Based on Example 1, this example provides a colorimetric process for monitoring and verifying the hardness of feedwater in a steam injection boiler, including the following steps: Assuming that sodium ion exchanger group A is in operation supplying softened water to the boiler, and sodium ion exchanger group B is in standby mode, the raw water in raw water tank 1 is pressurized by inlet pump 2 and passes through the primary tank 3 and secondary tank 4 of sodium ion exchanger group A in sequence to produce softened water for supply to the oilfield steam injection boiler 5.

[0059] When the remote command "monitor the hardness of the softened water at the secondary outlet of Group A" is issued, the electric regulating valve 8 opens for 10 seconds and adds 100 mL of sample water to the conical flask 11 through the four-way connector 10.

[0060] When 100 mL of sample water is added quantitatively to conical flask 11, it is connected to solenoid valve 15 through overflow pipe 11-3 located on the body of conical flask 11. Solenoid valve 15 opens for 5 seconds to overflow and then closes, so that the amount of sample water to be monitored can be accurately measured.

[0061] After the liquid surface in conical flask 11 has been still for 3 seconds, the cold white light source supplement lamp 20 is lit to facilitate video monitoring of whether the addition of the reagent is normal and whether it is mixed and colored.

[0062] Stepper motor 27-1 drives peristaltic pump 27. After 8 seconds of operation, 4 mL of buffer solution is quantitatively added from buffer solution bottle 24 to conical flask 11, adjusting the pH of the sample water to 10±0.1.

[0063] Stepper motor 26-1 drives peristaltic pump 26. After 4 seconds of operation, 0.2 mL of 0.5% Chrome Black T solution is quantitatively added from bottle 25 to conical flask 11.

[0064] The magnetic stir bar 12, placed at the bottom of the conical flask 11, rotates with the help of the magnetic field generated by the stirring motor box 13 placed on the device box 28. It can mix the sample water and medicine solution and develop color in 15 seconds, and then stand still.

[0065] Since the supplementary light 20 is always on, the network camera 21 can observe and compare the difference between the color of the sample water in the conical flask 11 and the standard colorimetric plate 19, thereby verifying whether the hardness meets the standard.

[0066] The video monitoring system uses 21 network cameras to remotely transmit video images of the sample water monitoring process and colorimetric results, facilitating remote visualization and colorimetric verification of the hardness of the sodium ion exchanger outlet water. If the sample water hardness monitoring result is a standard sky blue, it indicates that the hardness is qualified; if the sample water hardness monitoring result is purple or purplish-red, it indicates that the hardness is unqualified. This further indicates that the boiler water supply hardness is unqualified, and the boiler needs to be shut down and switched to the "standby" group to supply water to the boiler, preventing scale buildup on the boiler tubes and accidents such as "tube bursting" or "tube cracking".

[0067] Example 4: Based on Examples 1 and 3, this example provides a process for monitoring and verifying the hardness of the secondary outlet water sample from a colorimetric sodium ion exchanger during the cleaning step in the "regeneration" state of the exchanger, including the following steps: Assuming that sodium ion exchanger group B is in operation and sodium ion exchanger group A is in "regeneration" mode, monitoring can be performed when the set time for the "cleaning" step is about to end. At this time, the raw water in raw water tank 1 is pressurized by inlet pump 2 and passes through the primary tank 3 and secondary tank 4 of sodium ion exchanger group A in sequence to clean and exchange calcium and magnesium metal ions. The resulting wastewater is discharged through the "regeneration" cleaning drain valve 33.

[0068] When the remote command "monitor the hardness of the secondary outlet water sample of Group A" is issued, the electric regulating valve 8 opens for 10 seconds and quantitatively adds 100 mL of sample water to the conical flask 11 through the four-way connector 10.

[0069] When 100 mL of sample water is added quantitatively to conical flask 11, it is connected to solenoid valve 15 through overflow pipe 11-3 located on the body of conical flask 11. Solenoid valve 15 opens for 5 seconds to overflow and then closes, so that the amount of sample water to be monitored can be accurately measured.

[0070] After the liquid surface in conical flask 11 has been still for 3 seconds, the cold white light source supplement lamp 20 is lit to facilitate video monitoring of whether the addition of the reagent is normal and whether it is mixed and colored.

[0071] Stepper motor 27-1 drives peristaltic pump 27. After 8 seconds of operation, 4 mL of buffer solution is quantitatively added from buffer solution bottle 24 to conical flask 11, adjusting the pH of the sample water to 10±0.1.

[0072] Stepper motor 26-1 drives peristaltic pump 26. After 4 seconds of operation, 0.2 mL of 0.5% Chrome Black T solution is quantitatively added from bottle 25 to conical flask 11.

[0073] The magnetic stir bar 12, placed at the bottom of the conical flask 11, rotates with the help of the magnetic field generated by the stirring motor box 13 placed on the device box 28. It can mix the sample water and medicine solution and develop color in 15 seconds, and then stand still.

[0074] Since the supplementary light 20 is always on, the network camera 21 can observe and compare the difference between the color of the sample water in the conical flask 11 and the standard colorimetric plate 19, thereby verifying whether the hardness meets the standard.

[0075] The video monitoring system uses 21 network cameras to remotely transmit video images of the sample water monitoring process and colorimetric results, facilitating remote visualization and colorimetric verification of the hardness of the sodium ion exchanger effluent. If the sample water hardness monitoring result is a standard sky blue, it indicates that the hardness is qualified, meaning that the "regeneration" cleaning has reached its endpoint and can be stopped to reduce water waste. The cleaning time should also be reduced. If the sample water hardness monitoring result is purple or purplish-red, it indicates that the hardness is unqualified, meaning that the "regeneration" cleaning has not reached its endpoint and the cleaning time needs to be extended.

[0076] This invention provides, for example Figures 1 to 10 The device shown is an effluent hardness monitoring device based on a sodium ion exchanger, comprising: a sample water switching system, a sample water metering and mixing system, a reagent quantitative addition system, a supplementary light and standard colorimetric plate system, a video monitoring system and a control system, etc. The sample water switching system and the reagent quantitative addition system simultaneously add raw materials into the sample water metering and mixing system. The two raw materials are mixed by the sample water metering and mixing system. The mixed raw materials are compared by a supplementary light and a standard color comparison plate system. The comparison data is captured and transmitted by a video monitoring system and a control system.

[0077] like Figure 1 As shown, the sample water switching system includes a raw water tank 1, an inlet pump 2, a primary tank of a group A sodium ion exchanger 3, a secondary tank of a group A sodium ion exchanger 4, an oilfield steam injection boiler 5, a filter 1 6, a filter 2 7, an electric regulating valve 1 8, an electric regulating valve 2 9, and a four-way connector 10. The outlet of the raw water tank 1 is connected to an inlet pump 2. The outlet of the inlet pump 2 is connected to a primary sodium ion exchanger tank 3 (Group A). ​​The outlet of the primary sodium ion exchanger tank 3 is connected to a secondary sodium ion exchanger tank 4 (Group A). ​​The outlet of the secondary sodium ion exchanger tank 4 is connected to an oilfield steam injection boiler 5 via a pipeline. A "regeneration" cleaning drain valve 33 is connected to the outside of the pipeline between the secondary sodium ion exchanger tank 4 and the oilfield steam injection boiler 5. A filter 6 is connected to the pipeline between the secondary sodium ion exchanger tank 4 and the oilfield steam injection boiler 5. A filter 7 is connected to the outside of the pipeline between the secondary sodium ion exchanger tank 4 and the oilfield steam injection boiler 5, located on the side of filter 6. One end of filter 7 is connected to an electric regulating valve 9 via a pipeline. The end of filter 6 is connected to an electric regulating valve 8 via a pipeline. The outlets of electric regulating valves 8 and 9 are connected to a four-way connector 10 via a pipeline.

[0078] like Figure 1 , Figure 7 and Figure 8 As shown, the sample water metering and mixing system includes: a conical flask 11, a conical flask stopper 11-1, a water inlet 11-1-1, a vent 11-1-2, a 100mL graduation mark 11-2, a conical flask overflow pipe 11-3, a conical flask drain pipe 11-4, a magnetic stir bar 12, a stirring motor box 13, a speed control knob 14, a solenoid valve one 15, a solenoid valve two 16, a water receiving tray 17, a guide pipe 17-1, a fixed arm 18, a drain tank 22, and a drain pump 23; The conical stopper 11-1 is connected to the outlet pipe of the four-way connector 10. The top of the conical stopper 11-1 has an inlet hole 11-1-1. The outlet pipe of the four-way connector 10 is located inside the inlet hole 11-1-1. A vent hole 11-1-2 is provided on one side of the top of the conical stopper 11-1. A conical bottle 11 is fitted around the outside of the conical stopper 11-1. A 100mL graduation line 11-2 is provided on the outer surface of the conical bottle 11. An overflow pipe 11-3 is provided at the top of the conical stopper 11-1. One end of the overflow pipe 11-3 is connected to a solenoid valve 15. 1. A conical flask drain pipe 11-4 is connected to the bottom of the outer side. One end of the conical flask drain pipe 11-4 is connected to a solenoid valve 16. The solenoid valve 15 and the solenoid valve 16 are connected to a drain tank 22. One end of the drain tank 22 is connected to a drain pump 23 through a pipe. A magnetic stir bar 12 is installed inside the conical flask 11. A stirring motor box 13 is installed at the bottom of the conical flask 11. A speed control knob 14 is installed at one end of the stirring motor box 13. A water receiving tray 17 is installed at the bottom of the conical flask 11. A guide pipe 17-1 is installed at the bottom of the water receiving tray 17. A fixing arm 18 is installed on the outer side of the conical flask 11.

[0079] like Figure 1 As shown, the drug metering system includes a buffer solution bottle 24, a 0.5% chrome black T solution bottle 25, a peristaltic pump 26, a peristaltic pump 27, a stepper motor 26-1, and a stepper motor 27-1. The four-way connector 10 has two other inlets connected to peristaltic pump 26 and peristaltic pump 27 via pipes. Peristaltic pump 26 and peristaltic pump 27 are connected to check valve 31 and check valve 32 via pipes, respectively. A buffer solution bottle 24 is provided on the outside of check valve 31, and a 0.5% chrome black T solution bottle 25 is provided on the outside of check valve 32. The drive end of peristaltic pump 26 is connected to stepper motor 26-1, and the drive end of peristaltic pump 27 is connected to stepper motor 27-1.

[0080] like Figure 1 and Figure 2 As shown, the supplementary light 20 and standard color matching board 19 system includes a standard color matching board 19, a white color matching board 19-1, a sky blue color matching board 19-2, a supplementary light 20, a corrugated pipe support frame, and a network camera 21; A standard color matching plate 19 is installed above the water receiving tray 17 on one side of the conical flask 11. One end of the standard color matching plate 19 is provided with a white color matching plate 19-1, and another end of the standard color matching plate 19 is provided with a sky blue color matching plate 19-2 near the white color matching plate 19-1. A corrugated pipe support frame 20-1 is provided on one side of the water receiving tray 17, and a supplementary light 20 is provided on one side of the corrugated pipe support frame 20-1. A network camera 21 is installed above the water receiving tray 17 on one side of the standard color matching plate 19.

[0081] like Figure 1 and Figure 4 As shown, the video surveillance system and control system comprise a component box 28, signal cables and quick-connect plugs 29, and a control box 30. Below the stirring motor box 13, there is a component box 28. A signal cable is embedded in one end of the component box 28, and the other end of the signal cable is connected to the control box 30. The control system consists of a PLC, a touch screen, a power supply, and relays.

[0082] like Figures 7 to 10 As shown, an anti-sway assembly is provided inside the conical flask 11. The anti-sway assembly includes an annular airbag 34, a fixing plate 35, an elastic plate 36, a conical counterweight 37, and an inflation mechanism. The annular airbag 34 is disposed inside the conical flask 11, and the diameter of the annular airbag 34 when fully inflated matches the diameter of the 100ML mark 11-2 on the conical flask 11. There are two fixing plates 35, which are semi-circular in shape and symmetrically fixed to the top of the annular airbag 34. The elastic sheet 36 is connected between two fixed sheets 35. The conical counterweight 37 is located at the bottom axis of the annular airbag 34, and the maximum diameter of the top of the conical counterweight 37 is smaller than the opening diameter of the conical bottle 11. The top of the conical counterweight 37 is fixedly connected to the bottom center of the elastic sheet 36 by a pull rope, and the weight of the conical counterweight 37 is less than the buoyancy generated by the annular airbag 34 after it is fully inflated. The inflation mechanism is connected to the top of the annular airbag 34 and is used to inflate the annular airbag 34. The inflation mechanism includes a hose 38, a hollow rod 39, a rubber stopper 40, and a pressure ball 41. The hose 38 is T-shaped, and its two ends are symmetrically connected to the top of the annular airbag 34. A fixing ring 42 is fixedly sleeved at the bottom of the vertical section of the hose 38. The fixing ring 42 is fixedly connected to the top center of the elastic sheet 36. When the hose 38 is pulled by the hollow rod 39, the presence of the fixing ring 42 can concentrate the force of the hose 38 on the annular airbag 34 onto the axis of the annular airbag 34, which helps to ensure the stability when pulling the annular airbag 34. The hollow rod 39 is connected to the top of the hose 38. The top center of the conical bottle stopper has a through hole, and the air rod is inserted through the through hole. The rubber stopper 40 is fixedly sleeved on the hollow rod 39 and inserted into the bottom opening of the through hole. The pressure ball 41 is detachably connected to the top of the hollow rod 39. When quantitatively extracting sample water through the overflow tube 11-3 of the conical flask, the sample water inside the conical flask 11 is in a rotating state under the stirring of the magnetic stirrer 12. Therefore, when the sample water flows out through the overflow tube 11-3 of the conical flask, the fluctuating sample water surface makes it difficult to control the amount of sample water flowing out through the overflow tube 11-3 of the conical flask, which affects the accuracy of sampling. At this time, by setting an anti-sway component, before the sample water is introduced into the conical bottle 11, the conical counterweight 37 and the annular airbag 34 are first inserted into the conical bottle 11 from the bottle mouth. When inserting the annular airbag 34, the pressure ball 41 is removed first, thereby releasing the rest inside the annular airbag 34. At this time, the elastic piece 36 can be slightly folded with the horizontal end of the hose 38 as the center line, thereby reducing the diameter of the annular airbag 34 and the length of the elastic piece 36. Then, the slightly folded annular airbag 34, elastic piece 36 and conical counterweight 37 are inserted into the conical bottle 11. Then, the hollow rod 39 is inserted into the socket from bottom to top, and the hollow rod 39 is pulled upward, so that the rubber stopper 40 is inserted into the bottom opening of the socket under the pull of the hollow rod 39, thereby fixing the hollow rod 39 through the friction between the rubber stopper 40 and the socket. After the hollow rod 39 is fixed, the conical stopper 11-1 can be inserted into the opening of the conical flask 11. Then, the pressure ball 41 is connected to the top of the hollow rod 39, and air is injected into the annular airbag 34 by squeezing the pressure ball 41 until the annular airbag 34 is full. Then, sample water is injected into the conical flask 11 through the water inlet 11-1-1. When the sample water comes into contact with the annular airbag 34, as the liquid level rises, the annular airbag 34 can eventually float on the water surface. When the excess sample water flows out through the overflow pipe 11-3 of the conical flask, the sample water filling is completed. At this time, the annular airbag 34 can be kept in contact with the 1100ML mark 11-2 of the conical flask under the action of buoyancy. The conical counterweight 37 can be suspended at the bottom center of the annular airbag 34, thereby pulling the annular airbag 34 by its own weight, thus stabilizing the annular airbag 34. Due to the presence of the annular airbag 34, when the magnetic stirrer 12 stirs the sample water in the conical flask 11, the annular airbag 34 can press down the top edge of the sample water under the pulling force of the conical counterweight 37, so that the liquid surface at the top edge of the sample water is in a stable state. Thus, when the sample water flows out through the overflow pipe 11-3 of the conical flask, the outflowing sample water can maintain a stable flow state, thereby ensuring the accuracy of the sample water sampling.

[0083] like Figure 8 and Figure 9 As shown, the outer side of the annular airbag 34 is evenly distributed with anti-slip protrusions 43, and the anti-slip protrusions 43 are made of soft rubber. With the anti-slip protrusions 43, when the annular airbag 34 is fully inflated, it can adhere to the position of the 1100ML scale line 11-2 on the conical flask 11 under the action of buoyancy. When the magnetic stir bar 12 stirs the sample water in the conical flask 11, the anti-slip protrusions 43 can increase the friction between the annular airbag 34 and the conical flask 11, thereby ensuring that the annular airbag 34 remains stationary when the sample water rotates, thus ensuring the stabilizing effect of the annular airbag 34 on the sample water.

[0084] A monitoring method using the above-mentioned sodium ion exchanger-based effluent hardness monitoring device includes the following steps: Automatic sampling procedure: The sample water switching system is activated by the control system to quantitatively collect a predetermined volume of the sample water to be tested into the conical flask 11; Automatic dosing and color development steps: The reagent quantitative dosing system is started by the control system, and the predetermined amount of pH buffer and Eriochrome Black T indicator are added to the conical flask 11 in sequence. Then the magnetic stirring system is started to stir and mix the mixture to make a color development reaction. Image acquisition steps: After the mixing process, turn on the supplementary light 20 and acquire the image information of the color-developed sample water through the video monitoring system; Remote verification and decision-making steps: Compare the color of the sample water in the image information with the pre-stored standard color; If the color matches the standard sky blue, the water hardness is considered acceptable. If the color matches purple or purplish-red, the water hardness is deemed unqualified, and a control command is generated.

[0085] ①This standard specifies the use of EDTA titration to determine the total amount of calcium and magnesium in groundwater and surface water. This method is not applicable to water with high salinity, such as seawater. The minimum concentration that can be determined by this method is 0.05 mmol / L. ② Under pH 10 conditions, calcium and magnesium ions are titrated with EDTA solution using complexation, with Eriochrome Black T as an indicator. The EDTA solution reacts with calcium and magnesium to form a purple-red or purple solution. During the titration, the free calcium and magnesium ions react with EDTA first, and the calcium and magnesium ions complexed with the indicator then react with EDTA. At the endpoint, the color of the solution changes from purple to sky blue. ③ Buffer solution (pH 10) Weigh 1.25g of magnesium disodium EDTA (C10H12N2O8Na2Mg) and 16.9g of ammonium chloride (NH4Cl), dissolve them in 143ml of concentrated ammonia water (NH3·H2O), and dilute with water to 250ml; ④ Chrome Black T Indicator Dissolve 0.5g of Chrome Black T [HOC10H6N:N10H4(OH)(NO2)SO3Na, also known as Mordant Black 11, scientific name: sodium salt of 1-(1-hydroxy-2-naphthylazo)-6-nitro-2-naphthol-4-sulfonicacid] in 100ml of triethanolamine [N(CH2CH20H)3]. Up to 25ml of ethanol can be used instead of triethanolamine to reduce the viscosity of the solution. Store in a brown bottle. Alternatively, prepare Chrome Black T indicator powder by weighing 0.5g of Chrome Black T and mixing it thoroughly with 100g of sodium chloride (NaCl, GB1266-77), grinding it, passing it through a 40-50 mesh, and storing it in a brown bottle, tightly sealing it. ⑤ Measurement Pipette 100 ml of the sample into a 250 ml conical flask (11), add 4 ml of buffer solution (3.1) and 3-4 drops of Eriochrome Black T indicator solution or 50-100 mg of indicator powder. The solution should be purplish-red or purple at this point, and its pH value should be 10.0 ± 0.1. To prevent precipitation, immediately add disodium EDTA solution from the burette while shaking continuously. The titration speed should be slightly faster at the beginning and slightly slower near the endpoint, with thorough shaking. It is best to wait 2-3 seconds between each drop. The color of the solution will gradually change from purplish-red or purple to blue. The endpoint is when the last drop of purple hue disappears and sky blue just appears. The entire titration process should be completed within 5 minutes. Record the volume of disodium EDTA solution consumed in milliliters. Hardness calculation Since this invention only uses whether the color of the sample water is sky blue as a criterion for judging whether the hardness is qualified, hardness calculation is not required; Colorimetric verification To verify whether the hardness meets the standard, the color of the sample water in conical flask 11 was observed and compared with the standard color on the colorimetric chart. A standard colorimetric chart 19 was designed, vertically divided into two equal colors: a standard white colorimetric chart 19-1 (RGB: 255, 255, 255; HEX: FFFFFF) and a standard sky blue colorimetric chart 19-2 (RGB: 0, 128, 255; HEX: 0080FF). If the sample water hardness monitoring result is the standard sky blue, the hardness is considered acceptable; if the sample water hardness monitoring result is purple or purplish-red, the hardness is considered unacceptable; both require decision-making and action. Quantitative addition of 100 mL of sample water for conditioning process ①This invention relates to the parameters of an electric regulating valve: power supply DC24V, nominal diameter DN15, and engineering pressure PN0.8MPa; When the electric regulating valve is adjusted to 30%, 100 mL of sample water can be injected into conical flask 11 in 10 seconds; ②Verification method: Use a 100mL graduated cylinder for verification, with an accuracy of 1mL; Quantitative addition of 150 mL of sample water for conditioning process ①This invention relates to the parameters of an electric regulating valve: power supply DC24V, nominal diameter DN15, and engineering pressure PN0.8MPa; When the electric regulating valve is adjusted to 30%, 150 mL of sample water can be injected into conical flask 11 in 15 seconds. ②Verification method: A 250mL graduated cylinder was used for verification, with an accuracy of 5mL; The parameters of the solenoid valve 15 selected in this invention are: power supply DC24V, engineering pressure PN0.8MPa, and flow diameter 8mm. The parameters of the solenoid valve selected in this invention are: power supply DC24V, engineering pressure PN0.8MPa, and flow diameter 10mm. Mixing sample water and drug solution and color development process ① Parameters of the magnetic stir bar and drive motor box selected in this invention: The magnetic stir bar is cylindrical, with a diameter of 8mm and a length of 30mm; the drive motor has a power supply of DC24V, a speed of 100-2000 rpm, and a magnetic force range of 15-50mm; ②When the drive motor speed is set to 300 rpm, the sample water and medicine solution can be mixed and the color developed in 15 seconds; Quantitative addition of 4 mL of pH=10 buffer solution for reagent preparation process ① The parameters of the stepper motor and peristaltic pump selected in this invention are: power supply DC24V; peristaltic pump 2 is a 2-wheel set, pump tube diameter 3.5mm, flow rate 0.5mL-10mL / s; When the flow rate is adjusted to 0.5 mL / s, the peristaltic pump is turned on for 8 seconds, and 4 mL of buffer solution is injected into the cone to adjust the pH of the sample water to 10 ± 0.1. ②Verification method: A 5mL graduated cylinder was used for verification, with an accuracy of 0.1mL; Quantitative addition of 0.2 mL of 0.5% Chrome Black T reagent during the preparation process. ① The parameters of the stepper motor and peristaltic pump selected in this invention are: power supply DC24V, peristaltic pump 1 is a 3-wheel group, pump tube diameter 2mm, flow rate 0.05mL-5mL / s; When the flow rate is adjusted to 0.05 mL / s, the peristaltic pump is turned on for 4 seconds, and 0.2 mL of 0.5% Chrome Black T reagent can be injected into conical flask 11. ②Verification Method 1: Use a 5mL graduated cylinder for verification, with an accuracy of 0.1mL; ③Verification Method 2: Based on the titration standard of 20 drops / mL (i.e., 0.05mL / drop), use a stopwatch to observe and count; 4 drops (i.e., 0.2mL) of the drug solution can be added in 4 seconds.

[0086] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A sodium ion exchanger-based device for monitoring the hardness of water, characterized by, include: The system comprises a sample water switching system, a sample water metering and mixing system, a reagent quantitative addition system, a supplementary lighting and standard colorimetric plate system, a video monitoring system, and a control system. The sample water switching system and the reagent quantitative addition system simultaneously add raw materials into the sample water metering and mixing system, and the two raw materials are mixed by the sample water metering and mixing system. The mixed raw materials are compared by the supplementary lighting and standard colorimetric plate system, and the comparison data is captured and transmitted by the video monitoring and control system.

2. The sodium ion exchanger based water hardness monitoring device of claim 1, wherein: The sample water switching system includes a raw water tank (1), an inlet pump (2), a primary tank (3) of a group A sodium ion exchanger, a secondary tank (4) of a group A sodium ion exchanger, an oilfield steam injection boiler (5), a filter (6), a filter (7), an electric regulating valve (8), an electric regulating valve (9), and a four-way connector (10). The outlet of the raw water tank (1) is connected to the inlet pump (2), the outlet of the inlet pump (2) is connected to the primary tank (3) of a group A sodium ion exchanger, the outlet of the primary tank (3) of a group A sodium ion exchanger is connected to the secondary tank (4) of a group A sodium ion exchanger, and the outlet of the secondary tank (4) of a group A sodium ion exchanger is connected to the oilfield steam injection boiler (5) via a pipeline. A "regeneration" cleaning drain valve (33) is connected to the outside of the pipeline between the secondary tank (4) of the sodium ion exchanger and the oilfield steam injection boiler (5). A filter (6) is connected to the pipeline between the secondary tank (4) of the sodium ion exchanger and the oilfield steam injection boiler (5). A filter (7) is connected to the outside of the pipeline between the secondary tank (4) of the sodium ion exchanger and the oilfield steam injection boiler (5) on the side of the filter (6). One end of the filter (7) is connected to an electric regulating valve (9) through a pipeline. The end of the filter (6) is connected to an electric regulating valve (8) through a pipeline. The discharge ends of the electric regulating valve (8) and the electric regulating valve (9) are connected to a four-way connector (10) through a pipeline.

3. The sodium ion exchanger based water hardness monitoring device of claim 2, wherein: The sample water metering and mixing system includes: a conical flask (11), a conical flask stopper (11-1), a water inlet (11-1-1), a vent (11-1-2), a 100mL graduation mark (11-2), a conical flask overflow pipe (11-3), a conical flask drain pipe (11-4), a magnetic stir bar (12), a stirring motor box (13), a speed control knob (14), a solenoid valve one (15), a solenoid valve two (16), a water receiving tray (17), a guide pipe (17-1), and a fixing arm (18). ), drain tank (22) and drain pump (23); the conical stopper (11-1) is connected to the outlet pipe of the four-way connector (10), the top of the conical stopper (11-1) is provided with an inlet pipe hole (11-1-1), the outlet pipe of the four-way connector (10) is located inside the inlet pipe hole (11-1-1), the top of the conical stopper (11-1) is provided with an exhaust hole (11-1-2) on one side, and a conical bottle (11) is fitted on the outside of the conical stopper (11-1). (11) A 100mL graduation line (11-2) is provided on the outer surface. A conical bottle overflow pipe (11-3) is provided on the top of the conical bottle stopper (11-1). One end of the conical bottle overflow pipe (11-3) is connected to a solenoid valve (15). A conical bottle drain pipe (11-4) is connected to the bottom of the outer side of the conical bottle (11). One end of the conical bottle drain pipe (11-4) is connected to a solenoid valve (16). The solenoid valve (15) and the solenoid valve (16) are connected to a drain tank (22). The drain tank (22) is connected to a drain pump (23) through a pipe at one end. A magnetic stir bar (12) is installed inside the conical flask (11). A stirring motor box (13) is installed at the bottom of the conical flask (11). A speed control knob (14) is installed at one end of the stirring motor box (13). A water receiving tray (17) is installed at the bottom of the conical flask (11). A guide pipe (17-1) is installed at the bottom of the water receiving tray (17). A fixing arm (18) is installed on the outside of the conical flask (11).

4. The sodium ion exchanger based water hardness monitoring device of claim 3, wherein: The drug quantitative addition system includes a buffer solution bottle (24), a 0.5% chrome black T solution bottle (25), a peristaltic pump one (26), a peristaltic pump two (27), a stepper motor one, and a stepper motor two; the other two feed ports of the four-way connector (10) are respectively connected to peristaltic pump one (26) and peristaltic pump two (27) through pipes. The peristaltic pump one (26) and peristaltic pump two (27) are respectively connected to single-flow valve one (31) and single-flow valve two (32) through pipes. The buffer solution bottle (24) is set on the outside of the single-flow valve one (31), and the 0.5% chrome black T solution bottle (25) is set on the outside of the single-flow valve two (32). The drive end of the peristaltic pump one (26) is connected to stepper motor one (26-1), and the drive end of the peristaltic pump two (27) is connected to stepper motor two (27-1).

5. The water hardness monitoring device based on a sodium ion exchanger according to claim 4, characterized in that: The supplementary light (20) and standard color matching plate (19) system includes a standard color matching plate (19), a white color matching plate (19-1), a sky blue color matching plate (19-2), a supplementary light (20), a corrugated pipe support frame, and a network camera (21); a standard color matching plate (19) is set above the water tray (17) at one side of the conical bottle (11), a white color matching plate (19-1) is set at one end of the standard color matching plate (19), a sky blue color matching plate (19-2) is set at one end of the standard color matching plate (19) near the white color matching plate (19-1), a corrugated pipe support frame (20-1) is set on one side of the water tray (17), a supplementary light (20) is set on one side of the corrugated pipe support frame (20-1), and a network camera (21) is set above the water tray (17) at one side of the standard color matching plate (19).

6. The water hardness monitoring device based on a sodium ion exchanger according to claim 5, characterized in that: The video monitoring system and control system consist of a component box (28), a signal cable and quick connector (29), and a control box (30); the component box (28) is located below the stirring motor box (13), one end of the component box (28) is embedded with a signal cable, and the other end of the signal cable is connected to the control box (30). The control system consists of a PLC, a touch screen, a power supply, and relays.

7. The water hardness monitoring device based on a sodium ion exchanger according to claim 6, characterized in that: An anti-sway assembly is provided inside the conical flask (11). The anti-sway assembly includes an annular airbag (34), a fixing plate (35), an elastic plate (36), a conical counterweight (37), and an inflation mechanism. The annular airbag (34) is located inside the conical flask (11), and the diameter of the annular airbag (34) when fully inflated matches the diameter of the 100ML mark on the conical flask (11). There are two fixing plates (35), which are semi-circular in shape and symmetrically fixed to the top of the annular airbag (34). The elastic sheet (36) is connected between two fixed sheets (35). The conical counterweight (37) is located at the bottom axis of the annular airbag (34). The top of the conical counterweight (37) is smaller than the opening diameter of the conical bottle (11). The top of the conical counterweight (37) is fixedly connected to the bottom center of the elastic sheet (36) by a pull rope. The weight of the conical counterweight (37) is less than the buoyancy generated by the annular airbag (34) after it is fully inflated. The inflation mechanism is connected to the top of the annular airbag (34) and is used to inflate the annular airbag (34).

8. The water hardness monitoring device based on a sodium ion exchanger according to claim 7, characterized in that: The inflation mechanism includes a hose (38), a hollow rod (39), a rubber stopper (40), and a pressure ball (41). The hose (38) is T-shaped, and its two ends are symmetrically connected to the top of the annular airbag (34). A fixing ring (42) is fixedly sleeved at the bottom of the vertical section of the hose (38). The fixing ring (42) is fixedly connected to the top center of the elastic sheet (36). When the hose (38) is pulled by the hollow rod (39), the presence of the fixing ring (42) can keep the hose (38) inflatable. The force applied to the annular airbag (34) is concentrated on the axis of the annular airbag (34), which helps to ensure the stability when the annular airbag (34) is pulled. The hollow rod (39) is connected to the top of the hose (38). The top center of the conical bottle stopper is provided with an insertion hole. The air rod is inserted into the insertion hole. The rubber stopper (40) is fixedly sleeved on the hollow rod (39) and inserted into the bottom opening of the insertion hole. The pressure ball (41) is detachably connected to the top of the hollow rod (39).

9. The water hardness monitoring device based on a sodium ion exchanger according to claim 8, characterized in that: The outer side of the annular airbag (34) is evenly distributed with anti-slip protrusions (43), and the anti-slip protrusions (43) are made of soft rubber.

10. A monitoring method for an effluent hardness monitoring device based on a sodium ion exchanger according to claim 9, characterized in that, Includes the following steps: Step 1, Automatic Sampling Step: Start the sample water switching system through the control system to quantitatively collect a predetermined volume of the sample water to be tested into the conical flask (11); Step 2, Automatic dosing and color development: The reagent quantitative addition system is started by the control system, and a predetermined amount of pH buffer and Eriochrome Black T indicator are added to the conical flask (11) in sequence. Then, the magnetic stirring system is started to stir and mix the mixture so that a color development reaction occurs. Step 3, Image Acquisition Step: After the stirring and mixing process, turn on the supplementary light (20) and acquire the image information of the color-developed sample water through the video monitoring system; Step 4, Remote Verification and Decision-Making Step: Compare the color of the sample water in the image information with the pre-stored standard color; Step 5: Judgment: If the color matches the standard sky blue, the water hardness is deemed acceptable; if the color matches purple or purplish-red, the water hardness is deemed unacceptable, and a control command is generated.

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