A conductivity detection degassing pretreatment device

Abstract

The utility model discloses a conductivity detection degassing pretreatment device, specifically related to degassing pretreatment technical field, including base, be provided with processing subassembly on the base, processing subassembly includes the jar body of setting in the base, one side of jar body is provided with lining board, the bottom of lining board is provided with the gas filter jar. The utility model discloses through the polytetrafluoroethylene degassing membrane of embedding in the gas filter jar can directly separate the dissolved gas in solution, and the solution circulation of cooperation pump machine drive makes gas high -efficiently penetrate membrane layer and enter the upper chamber of gas filter jar, simultaneously, two series processing barrels are communicated through the pipe, and the stable flow is formed in the barrel to the solution, further releases residual bubble, realizes the double protection of primary degassing and secondary degassing, and the interference of bubble to electrode is reduced greatly, and the conductivity detection error is reduced significantly.

Description

Technical Field

[0001] This utility model relates to the field of degassing pretreatment technology, and more specifically, to a conductivity detection degassing pretreatment device. Background Technology

[0002] Conductivity measurement is an analytical method that indirectly reflects the ion concentration (or total dissolved solids content) in a solution by measuring the ability of ions to conduct current. It is based on the principle of conductivity in electrolyte solutions: when ions (such as Na+ in water) are present in the solution... + Cl - Ca 2+ When ions move in a specific direction under the influence of an electric field, they form an electric current. Conductivity is a physical quantity that measures the strength of this conductivity.

[0003] However, air bubbles are one of the main sources of error in conductivity detection (for example, air bubbles adhering to the electrode surface will reduce the effective measurement area), which leads to a large error in conductivity detection. Therefore, a degassing pretreatment device for conductivity detection that can eliminate air bubbles in the solution is provided. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a conductivity detection degassing pretreatment device, which aims to solve the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a conductivity detection and degassing pretreatment device, including a base, on which a processing component is disposed; The processing assembly includes a tank housed in a base, with an inner liner on one side of the tank, a filter tank at the bottom of the inner liner, a filter residue tank extending into the tank body on the filter tank, and a plurality of polytetrafluoroethylene degassing membranes for degassing embedded in the filter tank.

[0006] Optionally, in one possible implementation, the inner liner is mounted on the bottom of the base by a bracket, and a support frame is bolted to the bottom of the inner liner. A pump is embedded in the support frame, and the input end of the pump extends to and communicates with the filter tank. Two processing cylinders are provided on the top of the inner liner and are connected by a conduit. The output end of the pump extends to and communicates with the processing cylinders through a conduit. A controller for operation is provided on the top of the base, and a heater for temperature control is provided on one side of the controller. A reinforcing plate is provided on the side of the base away from the controller and the heater, and a solenoid valve is provided on one side of the reinforcing plate. An outlet pipe extending to one end of the filter tank is provided on the solenoid valve. The technical effects and advantages of this utility model are as follows: Dissolved gases in the solution can be directly separated by a polytetrafluoroethylene degassing membrane embedded in the filter canister. Combined with solution circulation driven by a pump, the gas can efficiently penetrate the membrane and enter the upper chamber of the filter canister. At the same time, two series-connected processing cylinders are connected by a conduit, and the solution forms a stable flow in the cylinder, further releasing residual bubbles. This achieves dual protection of preliminary degassing and secondary degassing, greatly reducing the interference of bubbles on the electrodes and significantly reducing the error in conductivity detection. Furthermore, the filter residue tank extends into the tank body, allowing for the pre-filtration of the injected solution to be tested. This prevents impurities from adhering to the surface of the PTFE degassing membrane or clogging the pump and conduit, protecting the core degassing components and preventing the impurities themselves from interfering with the ion concentration of the solution. This ensures that the pretreated solution simultaneously meets the testing requirements of being bubble-free and impurity-free. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0008] Figure 1 This is a front view of the overall structure of this utility model.

[0009] Figure 2 This is a cross-sectional view of the filter tank, processing cylinder, controller, and heater of this utility model.

[0010] Figure 3 This is a side view of the overall structure of this utility model.

[0011] The attached diagram is labeled as follows: 1. Base; 2. Tank body; 3. Inner liner plate; 4. Air filter tank; 5. Filter residue tank; 6. Pump; 7. Processing cylinder; 8. Controller; 9. Heater; 10. Air outlet pipe; 11. Solenoid valve; 12. Reinforcing plate. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0013] The conductivity detection degassing pretreatment device described in this embodiment uses base 1 as the mounting foundation and adopts a modular design. All processing components are integrated on base 1 and inner lining plate 3, resulting in a compact structure and easy maintenance. The specific parameters, selection, and corresponding figures of each core component are as follows: Base 1: As attached Figure 1 , 3 As shown, a rectangular mounting groove is reserved inside the base 1 for embedding the tank 2, and a high-temperature resistant silicone pad can be pasted on the inner wall of the groove to avoid rigid collision between the tank 2 and the base 1.

[0014] Inner lining panel 3: as attached Figure 1 , 2 As shown, the base 1 is installed at the bottom by an angle steel bracket, and a stainless steel support frame is bolted to the bottom of the inner lining plate 3. The inner wall of the support frame can be pasted with nitrile rubber pads to buffer the vibration of the pump 6 during operation.

[0015] Tank 2: As attached Figure 1 , 2 As shown, it is embedded in the rectangular mounting groove of the base 1, with a liquid inlet reserved at the top for easy injection of the solution to be tested, and an interface reserved near the bottom of the side wall for docking with the filter cake tank 5; a DS18B20 temperature sensor can be attached to the inner wall of the tank body 2 and connected to the controller 8 to monitor the solution temperature in real time, with a measurement range of -55℃ to 125℃ and an accuracy of ±0.5℃.

[0016] Filter cake tank 5: as attached Figure 2 As shown, one end extends into the interior of tank 2, and the other end is connected to the top flange of filter tank 4; the filter residue tank 5 has a built-in stainless steel filter screen, which can intercept solid particle impurities in the solution to be tested and avoid clogging the subsequent degassing membrane.

[0017] Air filter canister 4: as attached Figure 1 , 2 As shown, several polytetrafluoroethylene degassing membranes are uniformly embedded in the inner wall of the tank, fixed to the bottom of the inner lining plate 3. The degassing membrane has the characteristics of being permeable to air but impermeable to water, allowing dissolved gases in the solution, such as O2, CO2, and N2, to penetrate the membrane layer and enter the gas chamber at the top of the filter tank 4, while the solution is retained inside the membrane. The top of the filter tank 4 has a reserved interface for connecting to the filter residue tank 5, the bottom has a reserved interface for connecting to the input end of the pump 6, and the side wall has a reserved interface near the top for connecting to the gas outlet pipe 10.

[0018] Pump 6: As attached Figure 2 As shown, it is embedded in a stainless steel support frame, and the optional model is MP-300 miniature diaphragm pump; its operating function is to transport the solution after preliminary degassing and filtration in the filter tank 4 to the processing cylinder 7 through a PVC conduit to realize the dynamic circulation and transfer of the solution.

[0019] Processing cylinder 7: as attached Figure 2 ,3 As shown, there are two tubes, both fixed to the top of the inner liner 3, and connected in series via a P-conduit. Each treatment tube 7 can be welded with a baffle plate inside, which can create turbulence in the solution inside the tube, prolong the residence time, achieve secondary degassing, and further release the trace gas remaining in the solution. The top interface of the first treatment tube 7 is connected to the output end conduit of the pump 6, and the bottom of the second treatment tube 7 has a reserved liquid outlet, which can be directly connected to the inlet of a conductivity detector, such as the DDS-307, through a conduit to achieve seamless connection between pretreatment and detection.

[0020] Controller 8: As attached Figure 1 , 2 As shown, an S7-200SMART PLC controller is fixed to one side of the top of the base 1. Its operating functions include: receiving signals from the DS18B20 temperature sensor to control the start, stop and power of the heater 9; adjusting the speed of the MP-300 diaphragm pump to achieve flow control; receiving signals from the pressure sensor to control the opening and closing of the solenoid valve 11; and displaying the solution temperature, pump flow rate, filter tank pressure and equipment operating status in real time on the display screen, while also supporting manual button operation.

[0021] Heater 9: As attached Figure 1 , 2 As shown, the heating element is installed on the top of the base 1, close to the outer wall of the tank 2. The optional model is HT-220V / 50W ceramic heating element, which is attached to the tank 2 through a high-temperature resistant silicone pad. Its operating function is as follows: under the control of the controller 8, the solution to be tested in the tank 2 is heated at a constant temperature. The temperature control range is set to 25±1℃. At this temperature, the solubility of gas in water is low, which can help improve the degassing efficiency. When the temperature sensor detects that the solution temperature is below 24℃, the heater 9 starts heating; when it is above 26℃, the heater 9 stops working.

[0022] Reinforcing plate 12 and solenoid valve 11: as attached Figure 1 As shown, the reinforcing plate 12 is fixed to the base 1 on the side away from the controller 8 by steel bolts. The solenoid valve 11 is a two-position, two-way solenoid valve of type SV-08, which is fixed on the reinforcing plate 12. Its input end is connected to the air outlet pipe 10 through a silicone tube, and its output end is directly connected to the atmosphere. Its operating function is as follows: under the control of the controller 8, the exhaust control of the gas chamber in the upper part of the filter tank 4 is realized. When the gas pressure in the filter tank 4 reaches 0.1MPa, the controller 8 outputs a signal to open the solenoid valve 11 and discharge the gas. When the gas pressure drops to 0.05MPa, the solenoid valve 11 closes to prevent the solution from being sucked out due to negative pressure.

[0023] Air outlet pipe 10: as attached Figure 2 As shown, one end is connected to the side wall interface of the filter canister 4 via a quick connector, and the other end is connected to the input end of the solenoid valve 11, which is used to guide the desorbed gas in the filter canister 4 to the solenoid valve. The specific working principle is as follows: Open the silicone plug on the top of the tank 2, inject the solution to be tested into the tank 2 through the inlet, and close the silicone plug; press the start button on the controller 8, the device enters the standby state, the heater 9 starts, and begins to preheat the solution temperature to 25±1℃.

[0024] Once the solution temperature reaches the set value, the controller 8 automatically starts the pump 6. Under the action of gravity and the negative pressure of the pump, the solution in the tank 2 first flows through the filter screen of the filter residue tank 5 to intercept solid impurities. The filtered solution enters the gas filter tank 4 and comes into contact with the degassing membrane. The dissolved gas in the solution penetrates the membrane layer and enters the gas chamber at the top of the gas filter tank 4 to complete the initial degassing.

[0025] Pump 6 transports the pre-degassed solution from filter tank 4 to the first processing cylinder 7 through a PVC conduit. The solution in the processing cylinder 7 forms turbulence through a PP baffle, prolonging the residence time and further releasing residual gas for secondary degassing. Subsequently, the solution flows into the second processing cylinder 7 through a series conduit, achieving stable flow and avoiding pulsed delivery from affecting subsequent detection.

[0026] Gas continues to accumulate in the upper part of the air filter tank 4, and the air pressure gradually increases; the controller 8 outputs a command to open the solenoid valve 11, and the gas is discharged through the air outlet pipe 10 and the solenoid valve 11. The solution from the bottom outlet of the second processing tube 7 can flow directly into a conductivity meter, such as the DDS-307 sample introduction system, through a conduit. The meter measures the conductivity of the degassed solution, effectively avoiding measurement errors caused by air bubbles adhering to the electrodes.

[0027] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A conductivity detection and degassing pretreatment device, comprising a base (1), characterized in that: The base (1) is provided with a processing component; The processing assembly includes a tank (2) disposed in a base (1), a liner (3) disposed on one side of the tank (2), a gas filter tank (4) disposed at the bottom of the liner (3), a filter residue tank (5) disposed on the gas filter tank (4) extending into the tank (2), and a plurality of polytetrafluoroethylene degassing membranes for degassing are embedded in the gas filter tank (4).

2. The conductivity detection and degassing pretreatment device according to claim 1, characterized in that: The inner lining plate (3) is installed at the bottom of the base (1) by a bracket, and a support frame is installed at the bottom of the inner lining plate (3) by bolts.

3. The conductivity detection degassing pretreatment device according to claim 2, characterized in that: A pump (6) is embedded in the support frame, and the input end of the pump (6) extends to the air filter tank (4) and is connected to the air filter tank (4).

4. The conductivity detection and degassing pretreatment device according to claim 3, characterized in that: The top of the inner liner (3) is provided with two processing cylinders (7), and the two processing cylinders (7) are connected by a conduit. The output end of the pump (6) extends to the processing cylinder (7) through a conduit and is connected to the processing cylinder (7).

5. The conductivity detection and degassing pretreatment device according to claim 1, characterized in that: The top of the base (1) is provided with a controller (8) for operation, and a heater (9) for temperature control is provided on one side of the controller (8).

6. The conductivity detection and degassing pretreatment device according to claim 5, characterized in that: A reinforcing plate (12) is provided on the side of the base (1) away from the controller (8) and the heater (9). A solenoid valve (11) is provided on one side of the reinforcing plate (12). An outlet pipe (10) extending to one end of the filter canister (4) is provided on the solenoid valve (11).

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