Polarizer production liquid medicine treatment system

Abstract

The utility model discloses a polaroid production liquid medicine processing system which comprises a production tank, a pH value sensor, a conductivity sensor, a pH value adjusting loop and a boron removing loop, the pH value sensor and the conductivity sensor are arranged in the production tank and used for detecting the pH value and the conductivity value of liquid medicine in the production tank respectively, and the boron removing loop is arranged in the production tank. The production tank is provided with two groups of liquid inlet and outlet loops which are respectively connected with the acidity and alkalinity adjusting loop and the boron removal loop and are respectively used for adjusting the acidity and alkalinity of the liquid medicine in the production tank and removing boric acid. By utilizing the relevance between the boric acid concentration and the conductivity, the boric acid concentration in the liquid medicine is indirectly known according to the conductivity of the detected liquid medicine, so that the boric acid in the produced liquid medicine is conveniently removed, and the cleanliness of the liquid medicine is adjusted.

Description

Technical Field

[0001] The utility model relates to a liquid medicine treatment system for polarizer production, belonging to the technical field of polarizer production. Background Art

[0002] In the traditional polarizer production process, it is mainly based on the swelling of polyvinyl alcohol. In a homogeneous solution of potassium iodide and iodine, boric acid is used for auxiliary impregnation, and the polarizing performance process of the polarizer is realized through magnification stretching. In the stretching and impregnation process section of the PVA section, polyvinyl alcohol is immersed in various types of treatment tanks, such as dyeing tanks, cross-linking tanks, and stretching tanks. The polyvinyl alcohol film is immersed in a solution containing boric acid, iodine, potassium iodide, etc. contained in the dyeing tank and then dyed therein to achieve the effect of assisting dyeing. However, in some sections, the presence of boric acid can be an adverse influencing factor. For example, in subsequent adjustment or water washing sections, the granular crystals of boric acid adhere to the surface of the stretched PVA film, which is not conducive to subsequent blade water scraping, or some boric acid will cross-link with small molecule PVA to generate PVA chips, which adhere to the surface of the polarizer as foreign matters, resulting in a loss of the yield of polarizer production. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a liquid medicine treatment system for polarizer production, which utilizes the correlation between boric acid concentration and conductivity to indirectly understand the boric acid concentration in the liquid medicine according to the detected conductivity of the liquid medicine, remove boric acid in the production liquid medicine, and adjust the cleanliness of the production liquid medicine.

[0004] To achieve the above purpose / to solve the above technical problems, the utility model is implemented by adopting the following technical solutions.

[0005] On the one hand, the utility model provides a liquid medicine treatment system for polarizer production, including: a production tank, a pH sensor, a conductivity sensor, a pH adjustment circuit, and a boron removal circuit.

[0006] The production tank is provided with a first liquid outlet, a second liquid outlet, a first liquid inlet, and a second liquid inlet.

[0007] The pH adjustment circuit includes: a first drainage transfer pump, a first activated carbon adsorption column, an ion exchange resin column, a first reflux transfer pump, and a first plate heat exchanger; the first liquid outlet is connected to the inlet end of the first activated carbon adsorption column through the first drainage transfer pump, the outlet end of the first activated carbon adsorption column is connected to the inlet end of the ion exchange resin column, the outlet end of the ion exchange resin column is connected to the inlet of the first plate heat exchanger through the first reflux transfer pump, and the outlet of the first plate heat exchanger is connected to the first liquid inlet.

[0008] The boron removal circuit includes: a second drainage transfer pump, a boron removal resin column, a second activated carbon adsorption column, a second reflux transfer pump, a clarified liquid buffer tank, a heat exchange liquid transfer pump, and a second plate heat exchanger; the second liquid outlet is connected to the inlet end of the boron removal resin column through the second drainage transfer pump, the outlet end of the boron removal resin column is connected to the inlet end of the second activated carbon adsorption column, the outlet end of the second activated carbon adsorption column is connected to the clarified liquid buffer tank through the second reflux transfer pump, the clarified liquid buffer tank is connected to the inlet of the second plate heat exchanger through the heat exchange liquid transfer pump, and the outlet of the second plate heat exchanger is connected to the second inlet;

[0009] The pH sensor and the conductivity sensor are located in the liquid medicine of the production tank, and are respectively used to detect the pH value and the conductivity value of the liquid medicine in the production tank.

[0010] Further, the ion exchange resin column is filled with 001*7 styrene-based strongly acidic cation exchange resin, or any functional resin with the same pH adjustment function can be used.

[0011] Further, the height of the adsorption resin in the boron removal resin column is ≥850 mm; the adsorption resin is one of: an o-dihydroxy functional group material, a boron removal resin prepared by grafting N-methyl-D-glucosamine functional groups on polystyrene microspheres, a boron adsorption resin obtained by grafting and shrinking cross-linked polystyrene resin, or a boron adsorption resin with a silica gel-polyamine composite as a carrier and functionalized with grafted o-dihydroxy compounds.

[0012] Further, it also includes: a medicine replenishment pipeline, and the medicine replenishment pipeline is connected to the production tank through an electric valve.

[0013] Further, it also includes: a digital display liquid level gauge, the digital display liquid level gauge is connected to the side of the production tank, and the digital display liquid level gauge is connected to the microcontroller.

[0014] Further, the digital display liquid level gauge adopts an ultrasonic liquid level gauge or a high-frequency guided wave radar liquid level gauge.

[0015] Further, the activated carbon adsorption column is filled with Calgon's IPG activated carbon, and the particle size of the IPG activated carbon is 0.5 - 1 mm, or it can also be activated carbon with the same function.

[0016] Further, it also includes: a microcontroller, and the microcontroller is respectively connected to the pH sensor and the conductivity sensor.

[0017] Further, it further includes: a temperature sensor disposed in the production tank for detecting the temperature of the liquid medicine. The temperature sensor is connected to the microcontroller, and the microcontroller is used to control the on / off of the corresponding transfer pump according to the detection signals received from the pH sensor, conductivity sensor, and temperature sensor. The transfer pumps include: a first liquid discharge transfer pump, a second liquid discharge transfer pump, a first reflux transfer pump, a second reflux transfer pump, and a heat exchange liquid transfer pump;

[0018] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows: The present utility model uses corresponding sensors to detect the conductivity and pH value of the liquid medicine in real time. The microcontroller turns on the corresponding transfer pump in the pipeline according to the received detection signals, transports the liquid medicine to the ion exchange resin column or boron removal resin column for liquid medicine adjustment, and then transports it back to the production tank, realizing flexible control of the liquid medicine on the production line, saving time and labor, and reducing costs;

[0019] The present utility model utilizes the linear correlation between conductivity and boric acid concentration. By detecting the real-time conductivity and pH value of the liquid medicine, it indirectly controls the boric acid concentration range of the liquid medicine. When the liquid medicine in the production tank exceeds the preset conductivity value, the liquid medicine is transported to the boron removal resin column on the second liquid inlet and outlet loop for boric acid removal, and then pumped back to the production tank; when the liquid medicine in the production tank exceeds the preset pH value, the liquid medicine is transported to the ion exchange resin column on the first liquid inlet and outlet loop for pH value adjustment, and then pumped back to the production tank, realizing real-time adjustment of the conductivity and pH value of the liquid medicine in the production tank and the boric acid concentration, and thus quickly realizing the control of cleanliness, significantly improving the efficiency, and ensuring stable output quality;

[0020] The present utility model can ensure the cleanliness in the liquid medicine production tank on the extension line, avoid the situation of discharging liquid medicine when the boric acid concentration is high, maximize the utilization of resources, save the input of raw materials, and reduce the generation of waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the liquid medicine treatment system for polarizer production in an embodiment of the present utility model;

[0022] Figure 2 It is a fitting curve graph of boric acid and conductivity at normal temperature in an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The technical solution of the present utility model will be described in detail below through the drawings and specific embodiments. It should be understood that the specific features in the embodiments of the present utility model are detailed descriptions of the technical solution of the present utility model, rather than limitations on the technical solution of the present utility model. Without conflict, the technical features in the embodiments of the present utility model and the embodiments can be combined with each other.

[0024] The term "and / or" is merely a description of the relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " generally indicates that the associated objects before and after are in an "or" relationship. Embodiment

[0025] Such as Figures 1-2 In one embodiment, this embodiment provides a liquid treatment system for polarizer production, including: a production tank 1, a pH sensor 2, a conductivity sensor 8, a pH adjustment circuit, and a boron removal circuit. The production tank is used to hold the boric acid solution to be regulated.

[0026] A first liquid outlet and a second liquid outlet are provided at the bottom end of the production tank 1, and a first liquid inlet and a second liquid inlet are provided at the top end of the production tank 1.

[0027] The pH adjustment circuit includes: a first liquid discharge transfer pump 4, a first activated carbon adsorption column 5, an ion exchange resin column 3, a first reflux transfer pump 6, and a first plate heat exchanger 7. The first liquid outlet is connected to the inlet end of the first activated carbon adsorption column 5 through the first liquid discharge transfer pump 4. The outlet end of the first activated carbon adsorption column 5 is connected to the inlet end of the ion exchange resin column 3. The outlet end of the ion exchange resin column 3 is connected to the inlet of the first plate heat exchanger 7 through the first reflux transfer pump 6. The outlet of the first plate heat exchanger 7 is connected to the first liquid inlet.

[0028] The ion exchange resin column 3 is filled with 001*7 styrene-based strongly acidic cation exchange resin.

[0029] The pH sensor 2 is arranged in the production tank 1. When the liquid medicine in the production tank 1 exceeds the preset pH value, the liquid medicine is transported to the ion exchange resin column 3 on the first liquid inlet and outlet circuit through the corresponding transfer pump for pH value adjustment and then transported back to the production tank 1.

[0030] The boron removal circuit includes: a second liquid discharge transfer pump 11, a boron removal resin column 9, a second activated carbon adsorption column 10, a second reflux transfer pump 15, a clarified liquid buffer tank 13, a heat exchange liquid transfer pump 12, and a second plate heat exchanger 14. The second liquid outlet is connected to the inlet end of the boron removal resin column 9 through the second liquid discharge transfer pump 11. The outlet end of the boron removal resin column 9 is connected to the inlet end of the second activated carbon adsorption column 10. The outlet end of the second activated carbon adsorption column 10 is connected to the clarified liquid buffer tank 13 through the second reflux transfer pump 15. The clarified liquid buffer tank 13 is connected to the inlet of the second plate heat exchanger 14 through the heat exchange liquid transfer pump 12. The outlet of the second plate heat exchanger 14 is connected to the second liquid inlet.

[0031] The height of the adsorption resin in the boron removal resin column 9 is ≥850 mm. The adsorption resin is preferably a boron adsorption resin with a silica gel-polyamine composite material as a carrier and functionalized grafted with an o-dihydroxy compound. The method of connecting the same resin columns in series can be selected.

[0032] The conductivity sensor 8 is arranged in the production tank 1. When the conductivity value of the liquid medicine in the production tank 1 exceeds the preset conductivity value, the liquid medicine is conveyed to the boron removal resin column 9 on the second liquid inlet and outlet loop through the corresponding delivery pump for boric acid removal, and then conveyed back to the production tank 1.

[0033] The activated carbon adsorption column uses Ergon's IPG activated carbon, and the preferred particle size of the activated carbon is 0.5 - 1 mm.

[0034] It further includes a microcontroller 16. The microcontroller 16 is connected to the pH sensor 2, the conductivity sensor 8, and the temperature sensor 17. The temperature sensor 17 is arranged in the production tank 1 and is used to detect the temperature of the liquid medicine.

[0035] The microcontroller 16 can selectively set a USB transmission port and a memory. The memory is used to record data, and the USB transmission port is used to transmit the stored data to a PC, notebook, etc. for convenient data analysis.

[0036] It further includes: a medicine replenishment pipeline 18. The medicine replenishment pipeline 18 is connected to the production tank 1 through an electric valve. The type of the electric valve is a pneumatic electronic control valve or a stainless steel solenoid control valve, and the valve is connected to the microcontroller 16.

[0037] It further includes: a digital display liquid level gauge 19. The digital display liquid level gauge 19 is connected to the side of the production tank 1, and the digital display liquid level gauge 19 is connected to the microcontroller 16; the digital display liquid level gauge 19 is an ultrasonic liquid level gauge.

[0038] Working process: The production tank 1, together with a supporting pH sensor, conductivity sensor, and temperature sensor 17, forms a detection and control system with a microprocessor. The ideal target is set to keep the mass fraction of boric acid stable at 0.7 - 0.8%, the conductivity at 20°C is ≤3 μS / cm, the dynamic demand for the pH value of the solution is stable at 3 - 5, and the liquid level is controlled at 4 - 6 m;

[0039] When the conductivity sensor 8 of the solution in the production tank 1 senses that the conductivity value > 3 μm, it sends a signal to the microcontroller. The microcontroller 16 starts the second drainage delivery pump 11 to feed the liquid medicine into the boron removal resin column 9. The hourly flow rate of the solution is set to 10 times the volume of the resin in the boron removal resin column 9;

[0040] The liquid medicine after the above-mentioned boron adsorption treatment is introduced into the second activated carbon adsorption column 10 to filter out some impurities. The filtered clarified liquid is pumped by the second reflux transfer pump 15 and collected in the clarified liquid buffer tank 13. Then, the temperature is adjusted to the on-line use temperature through the second plate heat exchanger 14, and finally pumped back to the production tank 1;

[0041] In addition, for the liquid after boron removal, when the pH value of the production liquid medicine detected by the pH sensor 2 fluctuates beyond the set range of 3-8, the first drain transfer pump 4 is opened through the microcontroller 16, and the solution is passed through the first activated carbon adsorption column 5 for appropriate impurity removal. Then, the above-mentioned solution after impurity removal is passed through the ion exchange resin column 3, and the hourly flow rate of the solution is set to 5 times the volume of the adsorption resin in the column; the pH value is adjusted; the above-mentioned solution after pH adjustment is then transported by the first reflux transfer pump 6, and the temperature is adjusted to the set temperature through the first plate heat exchanger 7 and then refluxed to the on-line production tank to complete the pH adjustment process;

[0042] During the process of completing the boric acid removal cycle and the normal production process, the amount of liquid medicine will fluctuate, and the liquid level of the liquid medicine will fluctuate until the digital display liquid level gauge shows that the liquid level is lower than the set range of 4-6 m. The electronic control valve for replenishing the medicine is controlled to be opened through the microcontroller to supplement the amount of liquid medicine from the outside, realizing the timely replenishment of the liquid medicine and ensuring the stability of the dynamic fluctuation of the liquid level.

[0043] It should be particularly noted that the above-mentioned medicine replenishment action can also be carried out separately when the pH and boric acid concentration on the line are stable within the target values and the liquid level is low.

[0044] In summary, for the system provided by the present utility model, the pH adjustment unit, the boric acid removal adjustment unit and the liquid replenishment operation system can operate independently or in parallel, and convenient operation can be simply realized by relying on the control of the microcontroller, ensuring that the boric acid concentration fluctuation of the liquid medicine on the line is stable at about 3 μS / cm for up to 60 days, the intermediate boron removal efficiency can be about 78%, and the yield quality is stable.

[0045] As Figure 2 shown by the linear relationship between boric acid concentration and conductivity at room temperature, the boric acid concentration in the production liquid can be indirectly understood by detecting the conductivity. The present utility model detects the conductivity and pH value of the liquid medicine in real time through sensors. The microcontroller, according to the received detection signals, turns on the corresponding transfer pumps in the pipeline, transports the liquid medicine to the ion exchange resin column or the boron removal resin column for adjustment, and then transports it back to the production tank, realizing the flexible control of the liquid medicine on the production line, facilitating the removal of boric acid in the production liquid medicine, adjusting the cleanliness of the production liquid medicine, saving time and manpower, and reducing costs.

[0046] The embodiments of the present utility model have been described above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above specific embodiments. The above specific embodiments are merely illustrative rather than restrictive. Under the inspiration of the present utility model, those of ordinary skill in the art can also make many forms without departing from the purpose of the present utility model and the scope protected by the claims. All of these fall within the protection scope of the present utility model.

Claims

1. A polarizer production liquid processing system, characterized in that: include: Production tank, pH sensor, conductivity sensor, pH adjustment circuit and boron removal circuit; The production tank is provided with a first liquid outlet, a second liquid outlet, a first liquid inlet and a second liquid inlet; The pH adjustment circuit includes: a first drainage delivery pump, a first activated carbon adsorption column, an ion exchange resin column, a first reflux delivery pump and a first plate heat exchanger; The first liquid outlet is connected to the inlet end of the first activated carbon adsorption column through the first liquid discharge delivery pump, the outlet end of the first activated carbon adsorption column is connected to the inlet end of the ion exchange resin column, the outlet end of the ion exchange resin column is connected to the liquid inlet of the first plate heat exchanger through the first reflux delivery pump, and the liquid outlet of the first plate heat exchanger is connected to the first liquid inlet; The boron removal circuit comprises: a second drainage delivery pump, a boron removal resin column, a second activated carbon adsorption column, a second reflux delivery pump, a clarified liquid buffer tank, a heat exchange liquid delivery pump and a second plate heat exchanger; The second liquid outlet is connected to the inlet end of the boron removal resin column through a second liquid discharge delivery pump, the outlet end of the boron removal resin column is connected to the inlet end of the second activated carbon adsorption column, the outlet end of the second activated carbon adsorption column is connected to the clarified liquid buffer tank through a second reflux delivery pump, the clarified liquid buffer tank is connected to the liquid inlet of the second plate heat exchanger through a heat exchange liquid delivery pump, and the liquid outlet of the second plate heat exchanger is connected to the second liquid inlet; The pH sensor and the conductivity sensor are located in the drug solution in the production tank and are used to detect the pH value and the conductivity value of the drug solution in the production tank respectively.

2. The polarizer production liquid processing system according to claim 1, characterized in that: The height of the adsorption resin in the boron removal resin column is ≥850 mm.

3. The polarizer production liquid processing system according to claim 1, characterized in that: It also includes: a medicine replenishing pipeline, which is connected to the production tank through an electric valve.

4. The polarizer production liquid processing system according to claim 1, characterized in that: Also includes: A digital liquid level meter is connected to the side of the production tank, and the digital liquid level meter is connected to the microcontroller.

5. The polarizer production liquid processing system according to claim 4, characterized in that: The digital liquid level meter adopts an ultrasonic liquid level meter or a high-frequency guided wave radar liquid level meter.

6. The polarizer production liquid processing system according to claim 1, characterized in that: The activated carbon adsorption column is filled with Calgon's IPG activated carbon, and the particle size of the IPG activated carbon is 0.5-1 mm.

7. The polarizer production liquid processing system according to claim 1, characterized in that: The ion exchange resin column is filled with 001*7 styrene-based strongly acidic cation exchange resin.

8. The polarizer production liquid processing system according to claim 1, characterized in that: Also includes: A microcontroller is connected to the pH sensor and the conductivity sensor respectively.

9. The polarizer production liquid treatment system according to claim 8, characterized in that: Also includes: The temperature sensor is arranged in the production tank and is used to detect the temperature of the medicine solution. The temperature sensor is connected to the microcontroller.

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