Preliminary screening and early warning system for pH value
By using an automated detection method combining pH test strips and visual cameras in the pH detection system, the color changes of the test strips are analyzed using deep learning models, the pH value of circulating water is monitored in real time and the pH of the circulating water is adjusted, the corrosion problem of traditional electrodes in high temperature and hydrogen fluoride environments is solved, the stability and accuracy of the detection are improved, and the service life of the electrode is extended.
Patent Information
- Application Number
- CN202421920209.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-08
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-08
AI Technical Summary
Existing pH detection electrodes are prone to corrosion in high temperature and hydrogen fluoride environments, resulting in reduced detection accuracy and short electrode life. Especially when the pH is below 4, the antimony electrode will be severely corroded, affecting the detection accuracy.
A pH pH-based pH early warning system was designed, using a combination of pH test strips and visual cameras to combine automated sampling and detection, and the color changes of the test strips were analyzed through deep learning models, the pH value of circulating water was monitored in real time, and the pH value of the circulating water was adjusted through a liquid alkali pump.
Real-time monitoring of the pH value of circulating water is achieved, and corrosion problems of traditional electrodes in high temperature and hydrogen fluoride environments are avoided, the stability and accuracy of detection are improved, the service life of the electrode is extended, and human intervention is reduced to ensure the objectivity of the data and the safety of operation.
Smart Images
Figure CN223037800U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of waste disposal, and more specifically, it relates to a pH acidity and alkalinity preliminary screening and early warning system. Background Technique
[0002] During the incineration process of hazardous waste, a large amount of high-temperature acidic wastewater is generated in the primary tower and the secondary tower. We adjust the acidity and alkalinity of these wastewaters and then recycle them into the flue gas treatment system. When adjusting the circulating water in the primary tower, the parameter of the pH acidity and alkalinity value of these circulating waters is particularly important. After analysis, the circulating water has the following characteristics:
[0003] 1. High temperature.
[0004] 2. Acidic steam often accompanies the circulating water tank.
[0005] 3. Hydrogen fluoride is contained in the circulating water.
[0006] 4. The pH value will vary within a large span range with the working conditions. For example, the Min value is 0.1 and the Max value is 12.
[0007] Although the pH glass electrode we currently use has good detection accuracy, it often suffers from electrode corrosion and damage due to the influence of hydrogen fluoride. If an antimony electrode is used, although it can better tolerate hydrogen fluoride, in an acidic condition, especially when the pH is lower than 4, the surface of the electrode may be strongly corroded, which may lead to the dissolution of the electrode material or the formation of oxides, thus changing the working characteristics of the electrode and unable to accurately and truly reflect the pH value. Content of the Utility Model
[0008] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a pH acidity and alkalinity preliminary screening and early warning system capable of detecting the acidity and alkalinity of circulating water.
[0009] To achieve the above purpose, the utility model provides the following technical solutions:
[0010] A pH acidity and alkalinity preliminary screening and early warning system includes a circulating pool and a return pipe connected to the circulating pool. One side of the circulating pool is provided with a bottom plate, and a sampling unit and an inspection unit are arranged on the bottom plate.
[0011] The sampling unit includes a sampling pipe and a liquid dropper connected to the sampling pipe. The sampling pipe is connected to the return pipe. One end of the sampling pipe is provided with an electromagnetic valve. The inspection unit is placed below the liquid dropper, and the liquid dropper is connected with a drip irrigation valve.
[0012] The inspection unit includes a pH test paper roll, a rotating member connected to the pH test paper roll, and a vision camera disposed on one side of the pH test paper roll. The vision camera is placed directly above the pH test paper roll. The pH test paper roll is sleeved on the rotating member. The rotating member includes two brackets, and an inspection space is formed between the two brackets.
[0013] The present utility model is further configured as follows: A driving motor is provided at one end of the rotating member. The driving motor is disposed on one of the brackets. Two discs are provided on the bracket. A rotating roller is rotatably connected between the two discs. The driving motor is disposed on the disc. The rotating roller is connected to the output end of the driving motor. One end of the bracket is connected to the bottom plate.
[0014] The present utility model is further configured as follows: A base is provided under the vision camera. A column connected to the vision camera is provided on the base. The camera of the vision camera is aligned with the pH test paper.
[0015] The present utility model is further configured as follows: A number of ventilation holes are provided on the disc.
[0016] The present utility model is further configured as follows: A liquid caustic pump is provided above the circulation pool. The liquid caustic pump is electrically connected to the vision camera.
[0017] Compared with the deficiencies of the prior art, the beneficial effects of the present utility model are as follows:
[0018] It can monitor the pH value of wastewater in real time, avoid problems such as the short service life of traditional glass electrodes corroded by hydrofluoric acid, and the inability to detect normally due to the corrosion or oxidation of the electrode reaction surface of antimony electrodes under low pH conditions. Improve the stability and accuracy of the system. Further, automated sampling and detection are used to reduce human intervention, ensure data objectivity and operation safety, can greatly extend the service life of pH glass electrodes, and also enable the central control room to better grasp the changes in the data of the circulation pool with a pH value below 4. Description of the Drawings
[0019] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model.
[0020] Bottom plate 1, sampling tube 2, liquid dropper 3, drip valve 4, pH test paper roll 5, vision camera 6, bracket 7, disc 8, rotating roller 9, base 10. Detailed Embodiments
[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0022] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.
[0023] As Figure 1 shown,
[0024] A pH primary screening and early warning system includes a circulation pool and a return pipe connected to the circulation pool. Above the circulation pool, there is a liquid caustic pump, which is electrically connected to a vision camera 6. The feedback of the 1-14 pH value presented by the pH test paper is used as the primary screening. If the visually feedback pH value is 1-4, the liquid caustic addition pump is directly started until the feedback value is higher than 4.
[0025] On one side of the circulation pool, there is a bottom plate 1. On the bottom plate 1, there is a sampling unit and an inspection unit. The sampling unit includes a sampling pipe 2 and a liquid dropper 3 connected to the sampling pipe 2. The sampling pipe 2 is connected to the return pipe. One end of the sampling pipe 2 is provided with an electromagnetic valve. The inspection unit is placed below the liquid dropper 3. The liquid dropper 3 is connected with a drip valve 4, and the drip valve 4 makes the sample drip at a lower frequency.
[0026] The inspection unit includes a pH test paper roll 5, a rotating member connected to the pH test paper roll 5, and a vision camera 6 placed on one side of the pH test paper roll 5. Below the vision camera 6, there is a base 10. On the base 10, there is a column connected to the vision camera 6. The camera of the vision camera 6 is aligned with the pH test paper. The dripping sample falls on the pH test paper, and the pH test paper undergoes an acid-base reaction and the color changes. The vision camera 6 collects the corresponding color for data analysis, and compares the color signal through the deep learning model of the Inception-ResNet v2 version, and converts the visual signal into an accurate pH value number for output.
[0027] The vision camera 6 is placed directly above the pH test paper roll 5. The pH test paper roll 5 is sleeved on the rotating member. The rotating member includes two brackets 7. An inspection space is formed between the two brackets 7. The pH test paper is laid flat in the inspection space to facilitate catching the sample dripping from the liquid dropper 3.
[0028] One end of the rotating member is provided with a driving motor, which is placed on one of the brackets 7. There are two discs 8 on the bracket 7, and a number of ventilation holes are provided on the discs 8. A rotating roller 9 is rotatably connected between the two discs 8. The driving motor is placed on the disc 8, and the rotating roller 9 is connected to the output end of the driving motor. One end of the bracket 7 is connected to the bottom plate 1. The driving motor drives the rotating roller 9 to rotate, winds up the used pH test paper, and moves the unused pH test paper under the liquid dropper 3 for the next round of detection.
[0029] Working principle: Connect the sampling tube 2 to the circulation pool, put the pH test paper roll 5 on the rotating roller 9, install the vision camera 6 in a suitable position, and then extract the sample in the circulation pool through the solenoid valve. The drip valve 4 controls the sample to drip at a lower frequency. The dripped sample falls on the pH test paper, and the pH test paper undergoes an acid-base reaction and the color changes. The vision camera 6 collects the corresponding color for data analysis. The color signal is compared through the deep learning model of the Inception-ResNet v2 version, and the vision signal is converted into an accurate pH value number for output. According to the output value, the liquid caustic pump puts the corresponding reagent into the circulation pool to adjust the acidity and alkalinity in the circulation pool.
[0030] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.
Claims
1. A pH initial screening warning system, comprising a circulation pool and a reflux pipe connected to the circulation pool, characterized in that: A bottom plate (1) is provided on one side of the circulation pool, and a sampling unit and a testing unit are provided on the bottom plate (1). The sampling unit comprises a sampling tube (2) and a liquid drip tube (3) connected to the sampling tube (2); the sampling tube (2) is connected to a return tube; a solenoid valve is provided at one end of the sampling tube (2); the inspection unit is placed below the liquid drip tube (3); the liquid drip tube (3) is connected to a drip valve (4); The inspection unit comprises a pH test paper roll (5), a rotating member connected to the pH test paper roll (5), and a visual camera (6) disposed on one side of the pH test paper roll (5); the visual camera (6) is disposed directly above the pH test paper roll (5); the pH test paper roll (5) is sleeved on the rotating member; the rotating member comprises two brackets (7); and an inspection space is formed between the two brackets (7).
2. A pH acidity and alkalinity initial screening and early warning system according to claim 1, characterized in that: A driving motor is provided at one end of the rotating member, and the driving motor is placed on one of the brackets (7). Two discs (8) are provided on the bracket (7). A rotating roller (9) is rotatably connected between the two discs (8). The driving motor is placed on the disc (8), and the rotating roller (9) is connected to the output end of the driving motor. One end of the bracket (7) is connected to the bottom plate (1).
3. A pH initial screening and early warning system according to claim 2, characterized in that: A base (10) is provided under the visual camera (6), and a column connected to the visual camera (6) is provided on the base (10). The camera head of the visual camera (6) is aimed at the pH test paper.
4. A pH initial screening and early warning system according to claim 3, characterized in that: The disc (8) is provided with a plurality of air holes.
5. A pH acidity initial screening early warning system according to claim 4, characterized in that: A liquid alkali pump is provided above the circulation pool, and the liquid alkali pump is electrically connected to the visual camera (6).