Multi-component liquid concentration combined online analyzer

Abstract

The utility model discloses a multi-component liquid concentration combined online analyzer, which is characterized in that a liquid to be detected under pressure enters a fluorine-lined four-way joint from a feed port and flows through a conductive probe of a conductivity detector, and the conductive probe detects the temperature of the liquid and the resistance of the liquid to measure the alkali content in the liquid; the liquid continues to flow upwards to pass through the spectral concentration meter, an infrared light source of the spectral concentration meter emits infrared light to penetrate through the detected liquid, part of the infrared light is absorbed by chlorine in the liquid, the remaining infrared light is received by the receiving photosensitive semiconductor, and the system calculates the chlorine content in the liquid according to the value of the emitted infrared light source and the value received by the photosensitive semiconductor. And in combination with a control device, automation and intellectualization of the equipment are realized.

Description

Technical Field

[0001] The utility model relates to the field of chemical analysis equipment, in particular to a multi-component liquid concentration combined online analyzer. Background Art

[0002] In the production of chlor-alkali chemical industry, an emergency tower is generally equipped to use alkali solution to absorb the chlorine generated in the production process to avoid chlorine leakage and pollution of the environment and endangerment of personnel safety. At the same time, in the production of sodium hypochlorite, the process of absorbing chlorine with alkali solution is also adopted. During the process of absorbing chlorine with alkali solution, it is necessary to simultaneously detect the content of free alkali and effective chlorine in the alkali solution to determine whether the alkali solution that has absorbed chlorine meets the requirements, that is, whether the reaction has reached the end point, and whether the alkali solution needs to be replaced to improve production efficiency, avoid chlorine leakage, and ensure production safety. Generally, the requirements for chlor-alkali enterprises to determine that the reaction has reached the end point are that the mass percentage of free alkali in the sodium hypochlorite solution after the reaction is 0.5-1%, and the mass percentage of effective chlorine reaches about 13%.

[0003] The traditional method is to take samples manually and measure them by the pH method. The operator takes samples on site and uses the pH method to detect the pH value of the solution, thereby indirectly judging whether the reaction has reached the endpoint. This detection method requires the operator to frequently take samples, test and titrate. It is inefficient, not environmentally friendly, and there are safety hazards in the detection process. It also affects the degree of automation of the production line. At the same time, due to the long time from sampling to detection, the accuracy of the test results cannot be fully guaranteed. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide an online analyzer with a safe and environmentally friendly detection process, high detection efficiency, high degree of automation and accurate detection results.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A combined online analyzer for multi-component liquid concentration comprises a support column, a rain shelter mounted on the top of the support column, a control device mounted on the rain shelter, and a detection device mounted below the control device; the detection device comprises a fluorine-lined four-way, a mounting bracket arranged on the fluorine-lined four-way and used to fix the fluorine-lined four-way on the support column, a conductivity detector mounted on one side of the fluorine-lined four-way and used to detect the conductivity of the solution, a lower flange mounted on the bottom end of the fluorine-lined four-way, a spectrum concentration meter mounted on the top end of the fluorine-lined four-way, and an upper flange mounted on the top end of the spectrum concentration meter and used to fix the spectrum concentration meter.

[0007] Furthermore, the conductivity detector includes a mounting seat, a conductivity probe installed on the mounting seat and located in the fluorine-lined four-way, an explosion-proof box installed behind the mounting seat, a temperature transmitter installed in the explosion-proof box, and an explosion-proof cover installed behind the explosion-proof box.

[0008] Furthermore, the spectral concentration meter includes a detector seat, and quartz lenses installed on both sides of the detector seat, and a first flange and a second flange installed behind the quartz lens for fixing the quartz lens on the detector seat, and a first fixing seat arranged behind the first flange, and a second fixing seat arranged behind the second flange, and a reference photosensitive semiconductor installed on the first fixing seat, and an LED lamp arranged in the first fixing seat, and a receiving photosensitive semiconductor arranged in the second fixing seat, and a double-cut flange arranged behind the first fixing seat and the second fixing seat, and a sensor housing arranged behind the double-cut flange.

[0009] Preferably, the detector seat is in the shape of a hollow cylinder, and is provided with cutouts on both sides for fixing and installing a double-cut flange.

[0010] Preferably, the first fixing seat and the second fixing seat are both in a hollow cylindrical shape.

[0011] Furthermore, the control device includes a control box housing, a PLC installed inside the control box housing, a signal amplifier installed next to the PLC, a power supply installed next to the signal amplifier, a terminal installed at the bottom of the PLC, and a touch screen installed on the control box housing.

[0012] Furthermore, the lower flange is provided with a feed port; the upper flange is provided with a discharge port.

[0013] Preferably, the upper flange and the lower flange are both fixed by bolts.

[0014] The beneficial effects of the utility model are:

[0015] In this solution, the pressurized liquid to be tested enters the fluorine-lined four-way valve from the feed port, passes through the conductivity detector and the spectrum concentration meter, and is discharged from the discharge port. This process does not require shutdown or sampling for inspection, making the detection process not only safe and environmentally friendly, but also greatly improving work efficiency, timely detection, and accuracy. The conductivity detector can detect the liquid temperature and liquid resistance to measure the alkali content in the liquid; the spectrum concentration meter calculates the chlorine content in the liquid through the emitted infrared light source value and the value received by the photosensitive semiconductor; the conductivity detector adopts an explosion-proof design to ensure the safe operation of the conductivity detector; at the same time, the analyzer is fixed with a support column and a mounting bracket, with a simple and compact structure, which is easy to install and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a structural schematic diagram of an embodiment of a multi-component liquid concentration combined online analyzer of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of a detection device of an embodiment of a multi-component liquid concentration combined online analyzer of the utility model;

[0018] Figure 3 It is a schematic diagram of the structure of a conductivity detector of an embodiment of a multi-component liquid concentration combined online analyzer of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of a spectrum concentration meter of an embodiment of a multi-component liquid concentration combined online analyzer of the utility model;

[0020] Figure 5 The utility model is a schematic diagram of the control device structure of a multi-component liquid concentration combined online analyzer embodiment. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0022] Example 1

[0023] See also Figure 1-2 A multi-component liquid concentration combined online analyzer includes a support column 1, a canopy 2 installed on the top of the support column 1, a control device 3 installed on the canopy 2, and a detection device 4 installed below the control device 3; the detection device 4 includes a fluorine-lined four-way 41, and a mounting bracket 42 arranged on the fluorine-lined four-way 41 for fixing the fluorine-lined four-way 41 on the support column 1, and a conductivity detector 43 installed on one side of the fluorine-lined four-way 41 for detecting the conductivity of the solution, and a lower flange 44 installed at the bottom end of the fluorine-lined four-way 41, and a spectrum concentration meter 45 installed at the top of the fluorine-lined four-way 41, and an upper flange 46 installed at the top of the spectrum concentration meter 45 for fixing the spectrum concentration meter 45.

[0024] In this scheme, an online detection method is adopted, and there is no need to stop the machine or take samples for inspection. The change of liquid concentration can be monitored in real time, problems can be discovered in time and measures can be taken, thereby improving production efficiency and product quality; the equipment adopts a conductivity detector 43 and a spectrum concentration meter 45 for measurement, which has high accuracy and stability, and can accurately obtain the concentration information of the liquid, so that the detection of key components in the chlor-alkali chemical production process is more accurate and reliable; the conductivity detector 43 adopts an explosion-proof design to ensure the safe operation of the conductivity detector 43; the equipment is fixed with a support column 1 and a mounting bracket 42, and the structure is simple and compact, which is easy to install and maintain; and the fluorine-lined four-way 41 is a pipe connector with excellent corrosion resistance, which can effectively avoid equipment damage caused by corrosion and increase the service life of the equipment; the equipment adopts an upper flange 46 and bolts to fix the spectrum concentration meter 45 on the fluorine-lined four-way 41, so that the spectrum concentration meter 45 is firmly fixed, avoiding errors caused by factors such as vibration and vibration; there are two mounting brackets 42, which are respectively arranged at the upper and lower ends of the fluorine-lined four-way 41.

[0025] See also Figure 3 , and combined with Figure 1 The conductivity detector 43 includes a mounting seat 431, a conductivity probe 432 mounted on the mounting seat 431 and located in the fluorine-lined four-way 41, an explosion-proof box 433 installed behind the mounting seat 431, a temperature transmitter 434 installed in the explosion-proof box 433, and an explosion-proof cover 435 installed behind the explosion-proof box 433.

[0026] It should be noted that at a certain temperature, the conductivity of the solution is inversely proportional to its conductivity resistance, so the conductivity of the solution can be calculated by measuring the conductivity resistance; the solution between the two electrodes can be regarded as a resistor, and a voltage drop will be generated when current passes through; by measuring the voltage drop and the known electrode spacing, the conductivity detector 43 can accurately calculate the conductivity of the solution.

[0027] In this solution, the conductivity detector 43 is fixed to one side of the fluorine-lined four-way 41 by using flanges and bolts, that is, the mounting base 431 of the conductivity detector 43 is embedded in the fluorine-lined four-way 41, and then the mounting base 431 is fixed by the flange, so that the entire conductivity detector 43 is fixed to the fluorine-lined four-way 41, and the side opposite to the conductivity detector 43 is sealed by a flange; the conductivity detector 43 is provided with an explosion-proof box 433 and an explosion-proof cover 435, which can effectively protect the conductivity probe 432 and the temperature transmitter 434; the conductivity probe 432 is located in the fluorine-lined four-way 41, and can perform high-precision detection of the conductivity in the liquid during the detection process, ensuring that the detection result is accurate and reliable; the conductivity detector 43 is equipped with a temperature transmitter 434, which can monitor and compensate the temperature in real time, improve the reliability and stability of the detection, and effectively ensure the accuracy of the conductivity measurement; the conductivity detector 43 can effectively perform online detection of the liquid conductivity, and has a simple and clear structure, and is easy to clean and maintain.

[0028] See also Figure 4 The spectral concentration meter 45 includes a detector seat 450, and a quartz lens 451 installed on both sides of the detector seat 450, and a first flange 452 and a second flange 453 installed behind the quartz lens 451 for fixing the quartz lens 451 on the detector seat 450, and a first fixing seat 454 after the first flange 452, and a second fixing seat 455 after the second flange 453, and a reference photosensitive semiconductor 456 installed on the first fixing seat 454, and an LED lamp 457 arranged in the first fixing seat 454, and a receiving photosensitive semiconductor 458 arranged in the second fixing seat 455, and a double-cut edge flange 459 arranged behind the first fixing seat 454 and the second fixing seat 455, and a sensor housing 4510 arranged behind the double-cut edge flange 459.

[0029] It should be noted that the spectral concentration meter 45 adopts the near-infrared spectral analysis method, which is a spectral analysis method established based on the characteristic absorption of infrared radiation by substances; generally, there is strong absorption in the 700-2500nm band, which is mainly the double frequency and combined frequency absorption of hydrogen-containing groups (-0H-CH-NH, -SH, -PH).

[0030] In the present solution, the first flange 452 and the second flange 453 are hollow in design. By using a combination of a quartz lens 451 and a flange, the stability and accuracy of the optical path can be ensured, thereby improving the accuracy of the measurement. The reference photosensitive semiconductor 456 and the LED lamp 457 can provide a stable reference light source for correcting and compensating for changes in spectral measurement, thereby improving the accuracy and stability of the measurement. The receiving photosensitive semiconductor 458 is used to receive the light signal after passing through the sample, and the concentration in the sample is calculated by measuring the intensity of the received light signal. The design of the double-cut flange 459 and the sensor housing 4510 can effectively prevent light leakage and interference, thereby improving the accuracy and stability of the measurement. At the same time, the double-cut flange 459 can maintain the stable position and alignment of the components, thereby providing stable measurement performance. The spectral concentration meter 45 has a reasonable design structure and is easy to install. It is also easy to maintain and replace components, thereby reducing maintenance costs.

[0031] See also Figure 4 The detector seat 450 is in the shape of a hollow cylinder, and has cutouts on both sides for fixing and installing a double-cut flange 459.

[0032] In the present solution, the hollow cylindrical design of the detector seat 450 makes its structure simple and compact, which is conducive to the convenience of assembly and installation process; the setting of the cutout provides a fixed installation position for the double-cut edge flange 459, ensuring that the connection between the double-cut edge flange 459 and the detector seat 450 is stable and reliable, and not easy to loosen or shift; through the design of the cutout, the double-cut edge flange 459 can be easily disassembled and replaced, which is convenient for maintenance and replacement of parts; at the same time, the fixation of the double-cut edge flange 459 can ensure the stability and reliability of the components, reduce failures and errors caused by loosening or falling off, thereby enhancing the stability of the optical path, ensuring that there will be no changes or influences on the optical path during the measurement process, and improving the accuracy of the measurement.

[0033] See also Figure 4 The first fixing seat 454 and the second fixing seat 455 are both hollow cylindrical.

[0034] In this solution, the first fixing seat 454 and the second fixing seat 455 are hollow cylindrical in shape, providing an optical path for the spectral concentration meter 45, so that the light emitted by the LED lamp 457 is received by the receiving photosensitive semiconductor 458 after passing through the liquid to be tested; at the same time, the hollow structure can provide a good heat conduction effect, which can more effectively control the temperature and ensure the accuracy and stability of the spectral concentration meter 45.

[0035] See also Figure 5The control device 3 includes a control box housing 31, a PLC 32 installed inside the control box housing 31, a signal amplifier 33 installed next to the PLC 32, a power supply 34 installed next to the signal amplifier 33, a terminal 35 installed at the bottom of the PLC 32, and a touch screen 36 installed on the control box housing 31.

[0036] In this solution, the control box housing 31 can protect the PLC 32, the signal amplifier 33, the power supply 34 and the terminal 35 to prevent dust, moisture, debris, etc. from entering the interior; the PLC 32 is a programmable logic controller, which is an important device in the modern industrial automation control system. It can perform precise logical operations and control operations, ensure the accuracy and stability of the data, and can automatically perform control operations according to preset programs and parameters, reducing manual intervention, realizing the automation of the equipment, and improving production efficiency; the signal amplifier 33 is used to amplify the weak signal of the sensor to a suitable level for processing and control by the PLC 32; the power supply 34 can convert the connected 220V AC voltage into a 24V DC voltage to provide power support for the instrument to ensure its normal operation; the terminal 35 is used to connect various electrical appliances and components to realize signal transmission and control operations; the touch screen 36 is used for the human-computer interaction operation interface, which can perform intuitive and convenient parameter settings and data display, reducing the complexity of manual operation; through the combination of the above equipment and components, the solution realizes the automation and intelligence of the online analyzer, which has significant advantages and application value.

[0037] See also Figure 2 The lower flange 44 is provided with a feed port 441 ; the upper flange 46 is provided with a discharge port 461 .

[0038] In this solution, the setting of the feed port 441 and the discharge port 461 can ensure that the sample will not leak out, avoid harm to personnel and the environment, and ensure the accuracy and reliability of the measurement results; at the same time, it can also improve the working efficiency and stability of the analyzer, reduce the time and difficulty of sample processing, and improve the automation level of the analyzer; this design is suitable for various types of samples, can meet the needs of different fields and industries, and has high versatility and application value.

[0039] See also Figure 2 The upper flange 46 and the lower flange 44 are both fixed by bolts.

[0040] In this solution, a bolt fixing method is adopted, which makes it relatively simple to disassemble and replace the lower flange 44, the upper flange 46 and the spectrometer 45, which is convenient for equipment maintenance and cleaning and improves the maintainability of the equipment; the bolt fixing can make the connection between the lower flange 44 and the fluorine-lined four-way 41 tight, and at the same time, the upper flange 46 can tightly fix the spectrometer 45 on the fluorine-lined four-way 41, which can effectively prevent liquid leakage and gas escape, and ensure the stability and reliability of the system; the bolt fixing method is flexible and can adapt to lower flanges 44 and upper flanges 46 of different specifications and models, and has strong adaptability and versatility.

[0041] In this solution, the pressurized liquid to be measured enters the fluorine-lined cross-piece 41 from the feed port 441, flows through the conductivity probe 432 of the conductivity detector 43, and the conductivity probe 432 detects the liquid temperature and liquid resistance, calculates the conductivity of the liquid to be measured, and thus obtains the alkali content in the liquid. The liquid continues to flow upward and passes through the spectrum concentration meter 45. The infrared light source of the spectrum concentration meter 45 emits infrared light to pass through the liquid to be measured. Part of the infrared light will be absorbed by the chlorine in the liquid, and the remaining infrared light is received by the receiving photosensitive semiconductor 458. The system uses the emitted infrared light source value and the received photosensitive semiconductor value to calculate the alkali content in the liquid. The value received by semiconductor 458 is used to calculate the chlorine content in the liquid; by detecting the content of free alkali and effective chlorine in the liquid, it is determined whether the alkaline solution that has absorbed chlorine meets the requirements. When the content of free alkali in the liquid after the reaction is between 0.5 and 1%, and the content of effective chlorine reaches about 13%, it means that the reaction is over and new alkaline solution needs to be replaced to absorb the chlorine generated in the chlor-alkali chemical production. Otherwise, chlorine will overflow, pollute the environment, and endanger the lives of the workers. The accuracy of free alkali and effective chlorine detected by this analyzer can reach 0.1%.

[0042] The beneficial effects of the utility model are:

[0043] In this solution, the pressurized liquid to be tested enters the fluorine-lined four-way valve from the feed port, passes through the conductivity detector and the spectrum concentration meter in sequence, and is discharged from the discharge port. This process does not require shutdown or sampling for inspection, making the detection process not only safe and environmentally friendly, but also greatly improving work efficiency and the accuracy of the detection results; the conductivity detector can detect the liquid temperature and liquid resistance to measure the alkali content in the liquid; the spectrum concentration meter calculates the chlorine content in the liquid through the emitted infrared light source value and the value received by the photosensitive semiconductor; the conductivity detector adopts an explosion-proof design to ensure the safe operation of the conductivity detector; at the same time, the analyzer is fixed with a support column and a mounting bracket, with a simple and compact structure, which is easy to install and maintain.

[0044] The above-mentioned embodiments of the utility model are not intended to limit the protection scope of the utility model, and the implementation methods of the utility model are not limited to these. All other various forms of modifications, replacements or changes made to the above-mentioned structure of the utility model based on the above-mentioned contents of the utility model, in accordance with the common technical knowledge and customary means in the field, without departing from the above-mentioned basic technical ideas of the utility model, should fall within the protection scope of the utility model.

Claims

1. A multi-component liquid concentration combined online analyzer, comprising a support column, a rain shelter installed on the top of the support column, a control device installed on the rain shelter, and a detection device installed below the control device; Features: The detection device includes a fluorine-lined four-way, a mounting bracket arranged on the fluorine-lined four-way and used to fix the fluorine-lined four-way on a supporting column, a conductivity detector installed on one side of the fluorine-lined four-way and used to detect the conductivity of the solution, a lower flange installed at the bottom end of the fluorine-lined four-way, a spectrum concentration meter installed at the top end of the fluorine-lined four-way, and an upper flange installed at the top end of the spectrum concentration meter and used to fix the spectrum concentration meter.

2. A multi-component liquid concentration combined online analyzer according to claim 1, Features: The conductivity detector includes a mounting seat, a conductivity probe mounted on the mounting seat and located in a fluorine-lined four-way, an explosion-proof box mounted behind the mounting seat, a temperature transmitter mounted in the explosion-proof box, and an explosion-proof cover mounted behind the explosion-proof box.

3. A multi-component liquid concentration combined online analyzer according to claim 1, Features: The spectral concentration meter includes a detector seat, and quartz lenses installed on both sides of the detector seat, and a first flange and a second flange installed behind the quartz lens for fixing the quartz lens on the detector seat, and a first fixing seat arranged behind the first flange, and a second fixing seat arranged behind the second flange, and a reference photosensitive semiconductor installed on the first fixing seat, and an LED lamp arranged in the first fixing seat, and a receiving photosensitive semiconductor arranged in the second fixing seat, and a double-cut edge flange arranged behind the first fixing seat and the second fixing seat, and a sensor housing arranged behind the double-cut edge flange.

4. A multi-component liquid concentration combined online analyzer according to claim 3, Features: The detector seat is in a hollow cylindrical shape, and is provided with cutouts on both sides for fixing and installing double-cut flanges.

5. A multi-component liquid concentration combined online analyzer according to claim 3, Features: The first fixing seat and the second fixing seat are both in a hollow cylindrical shape.

6. A multi-component liquid concentration combined online analyzer according to claim 1, Features: The control device includes a control box shell, a PLC installed inside the control box shell, a signal amplifier installed next to the PLC, a power supply installed next to the signal amplifier, a terminal installed at the bottom of the PLC, and a touch screen installed on the control box shell.

7. A multi-component liquid concentration combined online analyzer according to claim 1, Features: The lower flange is provided with a feed port; the upper flange is provided with a discharge port.

8. A multi-component liquid concentration combined online analyzer according to claim 7, Features: The upper flange and the lower flange are both fixed by bolts.

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