A device for purifying a fluorine-containing liquid crystal intermediate

Abstract

The utility model relates to fluorine-containing liquid crystal intermediate impurity removal technical field, concretely is a kind of fluorine-containing liquid crystal intermediate impurity removal device, through the temperature control of electric heating plate and temperature sensor cooperation in storage bucket, cooperation drive motor drives stirring shaft linkage scraper to remove barrel wall deposit, significantly improve the fluidity of liquid;After pretreatment, intermediate is delivered to first filter cartridge by second suction pump, and is pressurized by injecting inert gas through air inlet connector, and viscous liquid is forced to penetrate bag type filter element to realize primary filtration;Enter second filter cartridge again and remove fine impurities and air bubble by PTFE membrane filter element;Gas-liquid mixture is guided into the middle part of collecting tank by bending pipe, and gas is automatically separated by hydraulic exhaust valve and sealed to prevent leakage, and finally pure liquid is output by first suction pump;By initiative pressurization and temperature control stirring combination, effectively solve the problem of high viscosity liquid blocking filter element;Double filtration cooperates with self-sealing exhaust structure, significantly improve product purity and operation safety.

Description

Technical Field

[0001] This utility model relates to the field of impurity removal technology for fluorine-containing liquid crystal intermediates, specifically to a device for removing impurities from fluorine-containing liquid crystal intermediates. Background Technology

[0002] Fluorine-containing liquid crystal intermediates are key chemical raw materials for manufacturing liquid crystal display materials, and their purity level directly affects the optical performance and lifespan of the final display. During the synthesis process, these intermediates often contain impurities such as unreacted substances, residual metal ions, mechanical particles, and bubbles. If not thoroughly removed, these impurities can lead to display defects, abnormal voltage driving, or lifespan degradation in the liquid crystal panel. To ensure the quality of the final product, specialized impurity removal equipment must be used to precisely purify the intermediates. This equipment removes various impurities through physical interception and separation, making it a core production device for ensuring that fluorine-containing liquid crystal materials meet electronic-grade purity standards.

[0003] Traditional impurity removal devices often lack active flow protection designs for viscous liquids, such as those containing fluorinated liquid crystal intermediates, which are prone to precipitating impurities. This results in low filtration efficiency and easy clogging of the filter element. At the same time, if the entire system is only pressurized by adding a suction pump, it cannot generate enough pressure to drive the viscous liquid to efficiently penetrate the precision filter layer, which also leads to increased energy consumption. Furthermore, there is no reliable way to separate and discharge residual gases generated during filtration, causing fluctuations in product purity and operational risks. Utility Model Content

[0004] The purpose of this invention is to provide a device for removing impurities from fluorinated liquid crystal intermediates, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A device for removing impurities from fluorinated liquid crystal intermediates includes a first filter cartridge, an air inlet connector installed through the upper radial outer side of the first filter cartridge, a bag filter element installed inside the first filter cartridge by bolts, the discharge end of the first filter cartridge connected to the input end of a second filter cartridge via a pipe, a PTFE membrane filter element installed inside the second filter cartridge by bolts, the discharge end of the second filter cartridge connected to the input end of a collection tank via a pipe extending to the middle of the collection tank, a bent pipe fixedly installed on the upper radial outer side of the collection tank, a hydraulic exhaust valve threaded onto the top of the bent pipe, and the discharge end of the collection tank connected to the suction end of a first suction pump via a pipe.

[0006] Preferably, a first cover is bolted to the top of the first filter cartridge, a second cover is bolted to the top of the second filter cartridge, and a pressure sensor is threaded onto the top of the first cover.

[0007] Preferably, the input end of the first filter cartridge is connected to the pumping end of the second suction pump via a pipe, and the suction end of the second suction pump is connected to the radially outer lower part of the storage tank via a pipe.

[0008] Preferably, a temperature sensor is installed through the upper radial outer side of the storage tank, an electric heating plate is fixedly installed inside the inner wall of the storage tank, and a lid is installed on the top of the storage tank by bolts.

[0009] Preferably, a liquid inlet connector is installed through the top edge of the bucket lid, and a drive motor is installed in the middle of the top of the bucket lid by bolts, with a stirring shaft provided at the output end of the drive motor.

[0010] Preferably, after the stirring shaft penetrates into the storage tank, several stirring rods are symmetrically installed on its radial outer side. A scraper is fixedly installed at the extended end of the stirring rod, and a rubber plate is provided at the end of the scraper and fits against the inner wall of the storage tank.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This device for removing impurities from fluorinated liquid crystal intermediates uses an electric heating plate built into the storage tank and a temperature sensor to regulate the temperature in real time. Combined with a stirring shaft driving a scraper to stir against the inner wall, it effectively reduces the viscosity of high-viscosity intermediates and removes deposits from the tank wall, thereby ensuring the fluidity of the liquid and preventing blockages in subsequent processing stages.

[0012] This fluorinated liquid crystal intermediate impurity removal device uses the air inlet connector of the first filter cartridge and the pressure sensor to work together to pressurize and force the viscous liquid through the dual filtration of the bag filter and the PTFE membrane filter. Then, the hydraulic exhaust valve at the top of the collection tank automatically separates the gas and liquid, which significantly improves the impurity removal rate and liquid purity, while preventing gas residue from affecting the output quality. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the first filter cartridge and the second filter cartridge of this utility model; Figure 3 This is a plan view of the storage container of this utility model; Figure 4 This is a plan view of the first filter cartridge and the second filter cartridge of this utility model.

[0014] In the diagram: 101, First filter cartridge; 102, Air inlet connector; 103, Bag filter element; 104, Second filter cartridge; 105, PTFE membrane filter element; 106, Collection tank; 107, Bent pipe; 108, Hydraulic exhaust valve; 109, First suction pump; 110, First cover; 111, Second cover; 112, Pressure sensor; 113, Second suction pump; 114, Storage tank; 115, Temperature sensor; 116, Electric heating plate; 117, Tank lid; 118, Liquid inlet connector; 119, Drive motor; 120, Stirring shaft; 121, Stirring rod; 122, Scraper; 123, Rubber plate. Detailed Implementation

[0015] 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.

[0016] Please see Figures 1-4 As shown, this utility model provides a technical solution: A fluorine-containing liquid crystal intermediate impurity removal device includes a first filter cartridge 101, an air inlet connector 102 is installed through the upper radial outer side of the first filter cartridge 101, a bag filter element 103 is installed inside the first filter cartridge 101 by bolts, the discharge end of the first filter cartridge 101 is connected to the input end of a second filter cartridge 104 through a pipe, a PTFE membrane filter element 105 is installed inside the second filter cartridge 104 by bolts, the discharge end of the second filter cartridge 104 is connected to the input end of a collection tank 106 through a pipe and extends to the middle of the inside of the collection tank 106, a bent pipe 107 is fixedly installed on the upper radial outer side of the collection tank 106, a hydraulic exhaust valve 108 is installed at the top end of the bent pipe 107 by threads, and the discharge end of the collection tank 106 is connected to the suction end of a first suction pump 109 through a pipe.

[0017] The above scheme utilizes a first filter cartridge to provide a sealed filtration space for the bag filter element. Gas is introduced into the first filter cartridge via an air inlet connector to increase pressure and assist filtration. The bag filter element intercepts larger particles of impurities in the liquid. A second filter cartridge connects to the first filter cartridge and houses a PTFE membrane filter element for fine filtration. The PTFE membrane filter element removes fine impurities and air bubbles from the liquid. A collection tank receives and stores the filtered liquid. A bend pipe guides the gas and liquid mixture into the middle of the collection tank to avoid impact. A hydraulic exhaust valve automatically discharges gas and closes when liquid flows in to prevent leakage. A first suction pump extracts the pure liquid from the collection tank and transports it downstream. In this embodiment, preferably, the top end of the first filter cartridge 101 is bolted with a first cover 110, the top end of the second filter cartridge 104 is bolted with a second cover 111, and the top end of the first cover 110 is threaded with a pressure sensor 112.

[0018] The above scheme uses a first cap to seal and fix the top of the first filter cartridge, a second cap to seal and fix the top of the second filter cartridge, and a pressure sensor to monitor the real-time pressure status inside the first filter cartridge.

[0019] In this embodiment, preferably, the input end of the first filter cylinder 101 is connected to the pumping end of the second suction pump 113 through a pipe, and the suction end of the second suction pump 113 is connected to the radially outer lower part of the storage tank 114 through a pipe.

[0020] The above scheme involves using a second suction pump to draw liquid from the storage tank and pressurize it into the first filter cartridge, while the storage tank stores the fluorine-containing liquid crystal intermediate raw material to be processed.

[0021] In this embodiment, preferably, a temperature sensor 115 is installed through the upper radial outer side of the storage tank 114, an electric heating plate 116 is fixedly installed inside the inner wall of the storage tank 114, and a lid 117 is installed on the top of the storage tank 114 by bolts.

[0022] The above scheme uses a temperature sensor to continuously monitor the temperature of the liquid in the storage tank, an electric heating plate to heat the liquid in the storage tank to reduce its viscosity, and a lid to seal the top opening of the storage tank.

[0023] In this embodiment, preferably, a liquid inlet connector 118 is installed through the top edge of the bucket cover 117, and a drive motor 119 is installed in the middle of the top of the bucket cover 117 by bolts, and a stirring shaft 120 is provided at the output end of the drive motor 119.

[0024] The above method involves injecting fluorinated liquid crystal intermediate raw materials into the storage tank through the liquid inlet connector, providing rotational driving force through a drive motor, and transmitting the power of the drive motor to the stirring components through a stirring shaft.

[0025] In this embodiment, preferably, after the stirring shaft 120 penetrates into the storage tank 114, a plurality of stirring rods 121 are symmetrically installed on its radial outer side. A scraper 122 is fixedly installed at the extended end of the stirring rod 121, and a rubber plate 123 is provided at the end of the scraper 122 and is attached to the inner wall of the storage tank 114.

[0026] The above method promotes mixing by stirring the liquid with a stirring rod, removes adhering substances by scraping the scraper that moves closely against the inner wall of the storage tank, and ensures that the scraper makes flexible contact with the inner wall of the storage tank by a rubber plate to avoid damage.

[0027] In this embodiment, a fluorinated liquid crystal intermediate impurity removal device is used. The fluorinated liquid crystal intermediate is introduced into the storage tank 114 through a liquid inlet connector 118 installed through the top edge of the tank cover 117. When the intermediate liquid becomes viscous due to temperature or composition, the internal temperature is monitored in real time by a temperature sensor 115. The electric heating plate 116 is activated to reduce the liquid viscosity. At the same time, the drive motor 119 synchronously drives the stirring shaft 120 to rotate. The stirring rod 121 and scraper 122 uniformly stir the liquid. The rubber plate 123 at the end of the scraper 122 adheres to the inner wall of the storage tank 114 to remove residues and prevent sedimentation. This process can be flexibly started and stopped according to the state of the intermediate to ensure the fluidity of the liquid for subsequent processing, thereby improving the impurity removal efficiency and preventing clogging. Subsequently, the second suction pump 113 draws the pretreated intermediate from the storage tank 114, pressurizes it, and pumps it to the input end of the first filter cartridge 101.

[0028] After entering the first filter cartridge 101, the bag filter element 103 performs preliminary filtration through its large-pore structure, intercepting larger particulate impurities. Simultaneously, the first cap 110 ensures system sealing. If the intermediate liquid becomes viscous, increasing filtration resistance, inert gas is introduced through the air inlet 102 to pressurize the liquid. Pressure changes within the cartridge are monitored by the pressure sensor 112, forcing the viscous liquid through the bag filter element 103, effectively overcoming the effects of high viscosity. After this preliminary filtration, the liquid enters the input end of the second filter cartridge 104 via a pipeline. The PTFE membrane filter element 105 within the second filter cartridge 104 performs final filtration, further removing fine impurities and air bubbles using its microporous properties. This dual filtration mechanism improves liquid purity while relying on the pressurizing effect of the second suction pump 113 to ensure continuous flow.

[0029] Finally, the gas-liquid mixture produced by filtration flows from the discharge end of the second filter cartridge 104 into the collection tank 106, and the bend pipe 107 guides the fluid into the middle of the tank. During this process, a hydraulic exhaust valve 108 is installed at the top of the bend pipe 107. When gas flows in, the internal rubber block allows the gas to escape; once liquid enters, the liquid pushes up the rubber block to form a seal, preventing liquid leakage. Subsequently, the first suction pump 109 draws pure liquid from the discharge end of the collection tank 106 and outputs it, forming a closed-loop impurity removal process. Throughout the process, the storage tank 114 pre-treats and optimizes the liquid properties, the dual filter cartridges refine and remove impurities in stages, the collection tank 106 exhausts and stabilizes the flow, and the suction pump maintains the system pressure balance, achieving efficient and safe purification of fluorinated liquid crystal intermediates.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for removing impurities from fluorinated liquid crystal intermediates, comprising a first filter cartridge (101), characterized in that: An air inlet connector (102) is installed through the upper radial outer side of the first filter cartridge (101). A bag filter element (103) is installed inside the first filter cartridge (101) by bolts. The discharge end of the first filter cartridge (101) is connected to the input end of the second filter cartridge (104) through a pipe. A PTFE membrane filter element (105) is installed inside the second filter cartridge (104) by bolts. The discharge end of the second filter cartridge (104) is connected to the input end of the collection tank (106) through a pipe and extends to the middle of the inside of the collection tank (106). A bent pipe (107) is fixedly installed on the upper radial outer side of the collection tank (106). A hydraulic exhaust valve (108) is installed at the top of the bent pipe (107) by threads. The discharge end of the collection tank (106) is connected to the suction end of the first suction pump (109) through a pipe.

2. A device for purifying a fluorine-containing liquid crystal intermediate according to claim 1, characterized by: The first filter cartridge (101) has a first cover (110) bolted to its top end, the second filter cartridge (104) has a second cover (111) bolted to its top end, and the first cover (110) has a pressure sensor (112) threaded to its top end.

3. A device for purifying a fluorine-containing liquid crystal intermediate according to claim 2, characterized by: The input end of the first filter cartridge (101) is connected to the pumping end of the second suction pump (113) through a pipe, and the suction end of the second suction pump (113) is connected to the radially outer lower part of the storage tank (114) through a pipe.

4. A device for purifying a fluorine-containing liquid crystal intermediate according to claim 3, characterized by: A temperature sensor (115) is installed through the upper radial outer side of the storage tank (114), an electric heating plate (116) is fixedly installed inside the inner wall of the storage tank (114), and a lid (117) is installed on the top of the storage tank (114) by bolts.

5. A device for purifying a fluorine-containing liquid crystal intermediate according to claim 4, characterized by: A liquid inlet connector (118) is installed through the top edge of the bucket cover (117), and a drive motor (119) is installed in the middle of the top of the bucket cover (117) by bolts. The output end of the drive motor (119) is provided with a stirring shaft (120).

6. The impurity removal device for fluorine-containing liquid crystal intermediates according to claim 5, characterized in that: After the stirring shaft (120) penetrates into the storage tank (114), several stirring rods (121) are symmetrically installed on its radial outer side. A scraper (122) is fixedly installed at the extended end of the stirring rod (121). The scraper (122) has a rubber plate (123) at its end and is in contact with the inner wall of the storage tank (114).

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