Industrial induction type acid-base concentration online detection system

Abstract

The invention discloses an industrial induction type acid-base concentration online detection system which comprises a detection pipeline, a controller, a solution buffer, a detection and cleaning device and a liquid storage tank, the detection pipeline comprises a main pipeline, a flange, a stop valve A and a liquid inlet pipe; the main pipeline is used for conveying a tested solution and is connected with the stop valve A through a flange, the stop valve A is connected with the liquid inlet pipe, and the liquid inlet pipe vertically extends into the solution buffer; the detection and cleaning device is connected between the solution buffer and the liquid storage tank, and liquid in the solution buffer is input into the detection and cleaning device for detection and then is discharged into the liquid storage tank; the detecting and cleaning device comprises a shell, a liquid discharge pipe A is connected between the bottom of the shell and the solution buffer, and a liquid discharge pipe B is connected between the top of the shell and the liquid storage tank; a digital induction type sensor is connected in the shell, and the pH value of a solution in the shell is detected through the digital induction type sensor; a cleaning assembly is further connected to the shell and used for cleaning the digital induction type sensor.

Description

Technical Field

[0001] The present invention belongs to the technical field of chemical production, and particularly relates to an industrial inductive acid-base concentration on-line detection system. Background Art

[0002] Industrial inductive acid-base concentration on-line detection devices and systems are a new generation of solution acid and alkali measurement instruments, with characteristics such as a pretreatment mechanism, corrosion resistance, full intelligence, multi-function, high measurement performance, and strong environmental adaptability. They can be widely used in industries such as hydrometallurgy, chemical engineering, and industrial wastewater treatment, and are suitable for continuous monitoring of the acid-base concentration in solutions with strong acidity or alkalinity and a relatively small fluctuation range of the acidity or alkalinity of the measured solution.

[0003] Existing inductive acid-base concentration meters belong to laboratory application instruments. Usually, it is necessary to pre-extract a solution detection sample and then place it on the instrument detection platform. This sampling and detection method has the following problems: (1) During the detection process, when the sample is collided or shaken, it is easy to tip over or leak, affecting the detection effect and causing harm to personnel. (2) The poor real-time performance of data cannot meet the requirements of the timeliness of production process adjustment.

[0004] In addition, the pH detector is also a way to measure the acid-base concentration of a solution. In the application of hydrometallurgy production, there are also the following problems: (1) During the pH detection process, the heavy metal content in the solution is relatively high, causing poisoning of the glass electrode and unable to measure normally; (2) The hydrogen fluoride content in copper and nickel acid water is relatively high, corroding the glass electrode and resulting in a large consumption of the electrode; (3) At present, there are many on-site detection points for pH glass electrodes, and the medium content in the wastewater is complex, making the detection difficult; (4) The glass electrode is scaled for a long time in the slurry, affecting the detection accuracy. Summary of the Invention

[0005] The present invention provides an industrial inductive acid-base concentration on-line detection system, aiming at the deficiencies existing in the measurement methods of current laboratory-level inductive acid-base concentration meters and on-line pH detectors, and aims to solve technical problems such as on-line detection, solution caching and defoaming, controller, data transmission, data monitoring platform, fault alarm, and automatic cleaning of the probe during the measurement process of the acid-base concentration of the solution.

[0006] For this purpose, the present invention adopts the following technical solutions: An industrial inductive online acid-base concentration detection system mainly consists of a solution pretreatment device, a digital inductive sensor, a controller, a wireless transmission network, and an online monitoring platform. The digital inductive sensor is the key component of this system, which obtains the acid-base concentration value of the solution while suppressing various interferences. The controller performs arithmetic processing on the data, displays the data, conducts data communication, sets parameters, and provides data support for the system construction. The wireless transmission network completes data interaction through the 4G-DTU module of the controller. Finally, data integration monitoring and display are achieved through the cloud platform.

[0007] The technical solution of the present invention is implemented as follows: The technical problem to be solved by the present invention is to suppress environmental and process interference factors while realizing online detection of the acid-base concentration of the solution, and ensure the stability and accuracy of the acid-base concentration measurement data. Design an online detection pipeline for the solution, preprocess the measured solution through a buffer to reduce the solution flow rate, eliminate bubbles, and improve the measurement effect. Data interaction between the controller and the sensor. Data transmission, data monitoring, and fault alarm among the controller, the 4G-DTU module, and the Internet of Things platform. Design a detection chamber that integrates measurement and automatic probe cleaning.

[0008] The present invention includes a detection pipeline, a controller, a solution buffer, a detector and cleaner, and a liquid storage tank.

[0009] The detection pipeline mainly includes a main pipeline, a flange, a stop valve A, a liquid inlet pipe, a solution buffer, a solenoid valve A, a drain pipe A, a detector and cleaner, a drain pipe B, and a solenoid valve B. The main pipeline is used to transport the measured solution. The main pipeline is connected to the stop valve A through a flange, the stop valve A is connected to the liquid inlet pipe, the outlet of the solution buffer is connected to the solenoid valve A, one end of the solenoid valve A is connected to one end of the drain pipe A, the other end of the drain pipe A is connected to the liquid inlet of the detector and cleaner, the liquid outlet of the detector and cleaner is connected to one end of the drain pipe B, the other end of the drain pipe A is connected to the solenoid valve B, the solenoid valve B is connected to one end of the drain pipe C, and the other end of the drain pipe C is connected to the access liquid storage tank.

[0010] The detector and cleaner uses a digital inductive sensor to detect the acid-base concentration of the solution flowing through the detection chamber, and the ultrasonic transducer can automatically clean the digital inductive sensor online, realizing the functions of online automatic detection and cleaning. The solution input end of the detection chamber is connected to the output end of the drain pipe A, the solution output end of the detection chamber is connected to the input end of the drain pipe B, the right, left, and lower surfaces of the detection chamber are respectively connected to the ultrasonic transducer A, the ultrasonic transducer B, and the ultrasonic transducer C, the upper surface of the detection chamber is connected to the digital inductive sensor, and the outer shell is fixedly installed on the upper surface of the detection chamber through screws.

[0011] Further, the solution buffer is connected to the liquid inlet pipe, the overflow pipe, and the drain pipe A. The liquid inlet pipe extends into the solution buffer at a position below two-thirds of its volume. Firstly, it can reduce the impact force of the outflowing liquid on the solution in the container. Secondly, it is beneficial for the bubbles in the liquid to escape. Thirdly, it ensures the timeliness of the solution discharged from the solution buffer and prevents some new liquid from being directly discharged through the overflow pipe, which may affect the measurement accuracy. The overflow pipe is located at the highest point of the solution buffer and is used to discharge the gas in the solution buffer. Firstly, it adjusts the internal air pressure of the solution buffer. Secondly, it can timely discharge the overflow liquid in the solution buffer caused by the increase in the liquid inlet flow rate to ensure the safety of the solution buffer. In short, the solution buffer is used to reduce the liquid flow rate, eliminate bubbles, improve the stability of the output solution, and reduce the impact of bubbles in the solution on the measurement accuracy.

[0012] Further, the detector and cleaner are connected to solenoid valve A and solenoid valve B, forming a structure with dual functions of detection and cleaning. When solenoid valve A and solenoid valve B are simultaneously opened through the controller, the structure is in the normal detection function at this time. When solenoid valve A is first closed and then solenoid valve B is closed through the controller, a sealed space is formed inside the structure and it is filled with solution, and it is in the cleaning state. By starting ultrasonic transducer A, ultrasonic transducer B, and ultrasonic transducer C connected to the detector and cleaner through the controller, the surface of the digital inductive sensor is cleaned using the mechanical wave characteristics of ultrasonic waves. After the cleaning is completed at a fixed time, the above steps are operated in reverse order to complete the cleaning and restore to the normal detection state.

[0013] Further, the detection pipeline, the controller, the solution buffer, the detector and cleaner, and the liquid storage tank constitute an industrial inductive acid-base concentration on-line detection device, which realizes the mutual switching between the two functions of automatic detection and automatic cleaning through automatic control technology.

[0014] Further, solenoid valve A, solenoid valve B, ultrasonic transducer A, ultrasonic transducer B, and ultrasonic transducer C are managed by the controller, and their start and stop are controlled according to the preset logic to cooperate to complete the functions of automatic detection and cleaning.

[0015] Further, the server is connected to the controller through a wireless 4G network to complete data interaction, status monitoring, and remote control.

[0016] The present invention has the following advantages compared with the prior art: The measurement of industrial acid-base concentration is realized by conductivity technology, effectively reducing the easy breakage of traditional glass electrodes. At the same time, it can prevent the situation of personnel accidentally entering, reducing casualties, and is worthy of being popularized and applied. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the system schematic diagram of the present invention; Figure 2 is the detection diagram of the present invention; In the figure: 1 - main pipeline, 2 - flange, 3 - globe valve A, 4 - liquid inlet pipe, 5 - solution buffer, 6 - globe valve B, 7 - solenoid valve A, 8 - server, 9 - controller, 10 - drain pipe A, 11 - digital inductive sensor, 12 - ultrasonic transducer A, 13 - ultrasonic transducer B, 14 - detector and cleaner, 15 - solenoid valve B, 16 - drain pipe B, 17 - wire, 18 - overflow pipe, 19 - drain pipe C, 20 - liquid storage tank, 21 - detection chamber, 22 - ultrasonic transducer C, 23 - housing, 24 - screw. Detailed implementation mode

[0018] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments: As Figure 1 shown, an industrial inductive acid-base concentration on-line detection system of this example specifically includes: a solution buffer 5, a server 8, a controller 9, and a detector and cleaner 14. The main pipeline 1 is connected to the globe valve A 3 through the flange 2 to form a sampling branch. At the same time, the globe valve A 3 can adjust the sampling flow rate and facilitate the maintenance of the components in the detection circuit. The liquid inlet pipe 4 extends into the solution buffer 5 at a position below two-thirds of its volume. The overflow pipe 18 is located at the highest point of the solution buffer 5. The drain pipe A 10 is connected to the conical outlet of the solution buffer 5 to reduce the liquid flow rate, eliminate bubbles, improve the stability of the output solution, and reduce the influence of bubbles in the solution on the measurement accuracy.

[0019] As Figure 2 shown, the cleaner specifically includes: a digital inductive sensor 11, an ultrasonic transducer A 12, an ultrasonic transducer B 13, a detector and cleaner 14, a detection chamber 21, an ultrasonic transducer C 22, a protective shell 23, and a screw 24. The digital inductive sensor 11 is connected to the detection chamber 21 through a thread. Through the principle of electromagnetic induction, the conductivity of the measured solution is detected, and it is converted according to the function algorithm between the conductivity and the acid-base concentration. Finally, the acid-base concentration value of the measured solution is obtained. The right, left, and lower surfaces of the detection chamber 21 are respectively connected to the ultrasonic transducer A 12, the ultrasonic transducer B 13, and the ultrasonic transducer C to form an ultrasonic cleaning device for cleaning the dirt on the surface of the digital inductive sensor and the detection chamber. The housing 23 is fixedly installed on the upper surface of the detection chamber 21 through the screw 24 to protect the ultrasonic transducer.

[0020] The solenoid valve A3 and the solenoid valve B15 are connected to the normally open contacts of the relay of the controller 9. The STM32 outputs I / O to control the relay to pull in, thereby controlling the solenoid valve to be energized and opened, and de-energized and closed. When the preset cleaning time is reached, the controller 9 closes the solenoid valve B15 and the solenoid valve A3 in sequence, so that the detector and cleaner 14 is in the cleaning mode, ensuring that the detection chamber 21 is filled with the solution while keeping the solution stationary, providing necessary conditions for the ultrasonic cleaning digital inductive sensor and the detection chamber. After the cleaning is completed, the controller 9 opens the solenoid valve A3 and the solenoid valve B15 in sequence to discharge the cleaning liquid in the detector and cleaner 14 and restore the automatic detection mode.

[0021] The ultrasonic transducer A12, the ultrasonic transducer B13, and the ultrasonic transducer C22 are connected to the drive circuit of the controller 9. When the detector and cleaner 14 is in the cleaning mode, the controller 9 simultaneously turns on the ultrasonic transducer A12, the ultrasonic transducer B13, and the ultrasonic transducer C22. When the mechanical waves generated by the ultrasonic transducers propagate in the solution, the tiny bubbles grow and close under the action of the sound waves, generating strong shock waves, destroying the dirt and dispersing it in the cleaning liquid, achieving the cleaning effect on the dirt on the surface of the digital inductive sensor and the detection chamber. After the cleaning is completed, the controller 9 simultaneously stops the operation of the ultrasonic transducer A12, the ultrasonic transducer B13, and the ultrasonic transducer C22.

[0022] The server 8 and the controller 9 achieve data interaction, online monitoring, and remote control through the 4G-DTU module of the controller 9 via the public cloud.

Claims

1. An industrial inductive acid-base concentration online detection system, characterized in that: It includes a detection pipeline, a controller (9), a solution buffer (5), a detection and cleaning device, and a liquid storage tank (20); The detection pipeline comprises a main pipeline (1), a flange (2), a stop valve A (3), and a liquid inlet pipe (4); the main pipeline (1) is used to transport a solution to be tested, the main pipeline (1) is connected to the stop valve A (3) through the flange (2), the stop valve A (3) is connected to the liquid inlet pipe (4), the liquid inlet pipe (4) vertically extends into a solution buffer (5), and the solution in the main pipeline (1) enters the solution buffer (5) after passing through the flange (2), the stop valve A (3) and the liquid inlet pipe (4); The detection and cleaning device is connected between the solution buffer (5) and the liquid storage tank (20); the liquid in the solution buffer (5) is input into the detection and cleaning device for detection and then discharged into the liquid storage tank (20); The detection and cleaning device comprises a detection chamber, a drainage pipe A (10) is connected between the bottom of the detection chamber and a solution buffer (5), and a drainage pipe B (16) is connected between the top of the detection chamber and a liquid storage tank (20), the solution enters the detection chamber through the drainage pipe A (10), and is then discharged into the liquid storage tank (20) through the drainage pipe B (16); a digital inductive sensor (11) is connected in the detection chamber, and the acidity and alkalinity of the solution in the detection chamber are detected by the digital inductive sensor (11); a cleaning component is also connected to the detection chamber, and the cleaning component is used to clean the digital inductive sensor (11); The controller (9) is connected to the digital inductive sensor (11) for signal communication.

2. The industrial inductive acid-base concentration online detection system according to claim 1 is characterized in that: The side and bottom surfaces of the detection chamber are respectively connected to a plurality of ultrasonic transducers, which emit ultrasonic waves to drive the liquid to vibrate, thereby cleaning the digital inductive sensor (11); the ultrasonic transducers are connected to the controller (9) via signals.

3. The industrial inductive acid-base concentration online detection system according to claim 1 is characterized in that: The liquid discharge pipe A (10) is connected to a solenoid valve A (7), the liquid discharge pipe B (16) is connected to a solenoid valve B (15), and the controller (9) is signal-connected to the solenoid valve A (7) and the solenoid valve B (15). When the controller (9) opens the solenoid valve A (7) and the solenoid valve B (15) at the same time, the structure is in a normal detection state. When the controller (9) closes the solenoid valve A (7) first and then closes the solenoid valve B (15), a sealed space is formed in the detection chamber and the interior is filled with a solution, and the structure is in a cleaning state.

4. The industrial inductive acid-base concentration online detection system according to claim 1 is characterized in that: The top of the solution buffer (5) is connected to an overflow pipe, the outlet of the overflow pipe is connected to the liquid storage tank (20), and a stop valve B (6) is connected to the overflow pipe.

5. The industrial inductive acid-base concentration online detection system according to claim 1 is characterized in that: The liquid inlet pipe (4) extends into the solution buffer (5) to a position below two-thirds.

6. The industrial inductive acid-base concentration online detection system according to claim 1 is characterized in that: It also includes a server (8), and a controller (9) is connected to the server (8) by signal via a wireless network, and the controller (9) is used to upload the monitored pH value to the server (8).

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