Organic solvent water removal device
The organic solvent dehydration device, which uses multi-stage filtration and chemical reaction, solves the problem of removing hydrogen-bonded water from organic electrolytes, achieving efficient water molecule removal and ensuring electrolyte purity, while avoiding device blockage and safety risks.
Patent Information
- Application Number
- CN202521303234.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-24
- Publication Date
- 2026-07-14
- Estimated Expiration
- 2035-06-24
AI Technical Summary
Existing technologies struggle to effectively remove water molecules bound by hydrogen bonds from organic electrolytes, resulting in poor purification and impacting battery performance and safety.
It adopts a multi-stage filtration design, including molecular sieve filtration, calcium hydride chemical reaction and impurity filtration. Molecular sieves physically adsorb free water, calcium hydride breaks hydrogen bonds that bind water, and impurities are intercepted by the filter plate. Combined with the stirring component, it prevents clogging and improves water removal efficiency.
It achieves efficient removal of water molecules from organic electrolytes, improves the purity and safety of the electrolyte, avoids device blockage and safety hazards, and enhances water removal efficiency.
Smart Images
Figure CN224485039U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of organic solvent dehydration equipment, and specifically to an organic solvent dehydration device. Background Technology
[0002] In the production and application of organic electrolytes, the presence of moisture can severely affect the electrochemical performance and stability of the electrolyte. When organic electrolytes contain moisture, during battery charging and discharging, the water may undergo side reactions with electrode materials and electrolyte salts, leading to battery capacity decay, shortened cycle life, and even safety hazards. Therefore, efficiently removing moisture from organic electrolytes is crucial to ensuring their quality.
[0003] Currently, the dehydration and purification of organic electrolytes mainly rely on single or simple combination filtration methods. Traditional molecular sieve filtration is a common method, which removes some free water from the electrolyte through physical adsorption. However, molecular sieves are difficult to effectively adsorb water molecules that are bound to electrolyte molecules through hydrogen bonds. This is because the hydrogen bonds cause water molecules to be tightly bound to electrolyte molecules, restricting the diffusion and adsorption of water molecules in the pores of the molecular sieve, resulting in poor purification effect. To address this problem, we propose an organic solvent dehydration device. Utility Model Content
[0004] The present invention aims to provide an organic solvent dehydration device to solve the problem that molecular sieves have difficulty effectively adsorbing water molecules bound by hydrogen bonds.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: an organic solvent dehydration device, comprising a filter barrel, wherein a filter device is provided inside the filter barrel, and the filter device consists of a molecular filter box, a chemical filter box, and an impurity filter box from top to bottom, and the filter devices are connected in sequence through a conveying pipe. The molecular filter box contains a molecular sieve, which can filter free water in the electrolyte. The chemical filter box contains calcium hydride, which can react with water molecules attached to hydrogen bonds. The impurity filter box contains a filter plate, which can intercept impurities generated in the chemical filter box.
[0006] The beneficial effects of this scheme are as follows: Utilizing the physical adsorption properties of molecular sieves, free water molecules in the electrolyte are rapidly captured, laying the foundation for subsequent deep water removal. Calcium hydride can chemically react with hydrogen-bonded water molecules, breaking the hydrogen bonds between water and solvent molecules, converting bound water into reactive free water, which is then completely removed through chemical adsorption. The filter plate effectively intercepts calcium hydroxide particles and unreacted calcium hydride powder produced by chemical filtration, preventing electrolyte contamination due to impurities. The combination of calcium hydride and molecular sieves has a high efficiency in removing water from polar organic solvents without causing side reactions with the main components of the electrolyte. This device, through a multi-stage design of "physical adsorption + chemical reaction + impurity filtration," systematically solves the problem of insufficient removal of hydrogen-bonded water by traditional methods, exhibiting significant advantages in water removal efficiency and electrolyte purity assurance.
[0007] Preferably, as an improvement, a gas outlet pipe and a feed pipe are provided between the chemical filter box and the filter barrel. The gas outlet pipe is used to discharge the gas generated by the chemical filter box, and the feed pipe is used to add calcium hydride into the chemical filter box.
[0008] The beneficial effects are as follows: The reaction of calcium hydride with water in the chemical filter chamber generates hydrogen gas. The gas outlet pipe can promptly discharge the hydrogen gas produced by the reaction, preventing gas accumulation in the chemical filter chamber, maintaining stable internal pressure, and preventing safety accidents such as device rupture or even explosion due to excessive pressure. Simultaneously, continuous gas discharge promotes the forward reaction, ensuring sufficient contact between calcium hydride and water, thus improving dehydration efficiency. Calcium hydride can be conveniently replenished into the chemical filter chamber during operation via the inlet pipe. When some of the calcium hydride in the chamber is consumed, new raw materials can be added promptly to ensure the continuous chemical dehydration reaction and prevent insufficient calcium hydride from affecting the dehydration effect.
[0009] Preferably, an outlet pipe is provided between the lower end of the impurity filter box and the filter barrel, and an inlet pipe connected to the molecular filter box is provided at the upper end of the filter barrel.
[0010] Preferably, as an improvement, the filtration device further includes a stirring assembly, which includes a motor, a rotating shaft, and several cleaning components. The motor is located on the inner wall of the lower end of the filter barrel, and the rotating shaft is located on the upper end of the motor output end. The rotating shaft rotates sequentially through the impurity filter box, the chemical filter box, and the molecular filter box. Several cleaning components are evenly distributed on the outer wall of the rotating shaft located in the impurity filter box. The cleaning components include a mounting base, a mounting plate, and a scraper. The mounting base is located on the outer wall of the rotating shaft, and the mounting plate is located inside the mounting base. A torsion spring is provided between the mounting base and the mounting plate. The scraper is located at one end of the mounting plate, and the lower end of the scraper abuts against the upper end of the filter plate.
[0011] The beneficial effects are as follows: the motor drives the rotating shaft to rotate, thereby causing the cleaning components to rotate inside the chemical filter box. When the scraper rotates with the rotating shaft, it uses the elastic force of the torsion spring to stick tightly to the surface of the filter plate and continuously scrape off impurities such as calcium hydroxide particles and unreacted calcium hydride powder, thereby avoiding clogging of the filter plate and improving the water removal efficiency of the electrolyte.
[0012] Preferably, as an improvement, the stirring assembly further includes several lifting platforms, which are evenly arranged on the inner wall of the impurity filter box. The two ends of the lifting platforms are set as inclined surfaces, and several grooves are opened in the middle of the lifting platforms. The grooves are set as right-angled trapezoids. The end of the mounting plate near the lifting platform is opened with a notch, which can slide along the inclined surface and the groove.
[0013] The beneficial effects are as follows: the lifting platform is used to raise the mounting plate, thereby raising the scraper. When the mounting plate moves to the notch, the mounting plate descends and collides with the lower end of the notch, which vibrates the lifting platform. The lifting platform then transmits the vibration to the filter plate through the impurity filter box, thereby further preventing the filter plate from becoming clogged. At the same time, the scraper also vibrates, thereby shaking off the impurities on the outer wall of the scraper and improving the cleaning efficiency of the scraper.
[0014] Preferably, as an improvement, the rotating shaft is provided with several stirring rods on the outer wall of both the molecular filter box and the chemical filter box, and the stirring rods are set in an arc shape.
[0015] The beneficial effects are as follows: When the arc-shaped stirring rod rotates, it can guide the electrolyte to form a spiral flow, which makes the electrolyte generate a stronger turbulence effect in the molecular filter box and the chemical filter box. In the molecular filter box, the turbulence enhances the contact frequency and contact area between the electrolyte and the molecular sieve, which promotes the faster and more complete adsorption of free water by the molecular sieve. In the chemical filter box, the turbulence accelerates the collision between calcium hydride and water molecules, speeds up the chemical reaction rate, and improves the removal efficiency of hydrogen-bonded water.
[0016] Preferably, as an improvement, the upper end of the rotating shaft is provided with an arc-shaped cover, and the arc-shaped cover is located directly below the feed inlet.
[0017] The beneficial effects are as follows: After the electrolyte is injected into the filter tank from the feed port, it directly impacts the curved surface of the arc-shaped cover. Under the guiding effect of the arc-shaped cover, the electrolyte can spread evenly in all directions along the arc-shaped surface, avoiding concentrated impact on a certain area. This makes the electrolyte more evenly distributed in the molecular filter box, ensuring that the molecular sieve and the electrolyte are in full contact, and improving the adsorption efficiency of free water. Attached Figure Description
[0018] Figure 1 This is a three-dimensional schematic diagram of the water removal device according to an embodiment of the present invention;
[0019] Figure 2This is a partial cross-sectional view of the water removal device according to an embodiment of the present invention;
[0020] Figure 3 for Figure 2 A magnified structural diagram of point A in the middle. Detailed Implementation
[0021] The following detailed description illustrates the specific implementation method:
[0022] The reference numerals in the accompanying drawings include: filter barrel 1, molecular filter box 2, chemical filter box 3, impurity filter box 4, conveying pipe 5, filter plate 6, gas outlet pipe 7, dispensing pipe 8, liquid outlet pipe 9, feed pipe 10, motor 11, rotating shaft 12, mounting base 13, mounting plate 14, scraper 15, torsion spring 16, lifting platform 17, groove 18, stirring rod 19, and arc-shaped cover 20.
[0023] Example
[0024] The basic implementation examples are as follows: Figures 1-3 As shown, Figure 1 An organic solvent dehydration device is shown, comprising a filter barrel 1, wherein a filter device is fixedly installed inside the filter barrel 1, such as... Figure 2 The filtration device shown consists of a molecular filter box 2, a chemical filter box 3, and an impurity filter box 4, arranged from top to bottom. These three boxes are connected sequentially via a conveying pipe 5. The molecular filter box 2 is filled with a molecular sieve, which filters free water from the electrolyte. The chemical filter box 3 is filled with calcium hydride, which reacts with water molecules attached to hydrogen bonds. A filter screen is fixedly installed inside the conveying pipe 5 to filter the molecular sieve and calcium hydride, preventing them from mixing. The chemical filter box 3 is connected to the filter container 1. An outlet pipe 7 and a feed pipe 8 are installed in a convex manner, with the height of the outlet pipe 7 being higher than that of the feed pipe 8. The outlet pipe 7 is used to discharge the gas generated by the chemical filter box 3, and the feed pipe 8 is used to add calcium hydride into the chemical filter box 3. A filter plate 6 is fixedly installed on the inner wall of the impurity filter box 4. The filter plate 6 can intercept the impurities generated in the chemical filter box 3. In this embodiment, two filter plates 6 are set. A liquid outlet pipe 9 is installed between the lower end of the impurity filter box 4 and the filter barrel 1. A feed pipe 10 connected to the molecular filter box 2 is fixedly installed at the upper end of the filter barrel 1.
[0025] The filtration device also includes a stirring component, such as Figure 2The stirring assembly shown includes a motor 11, a rotating shaft 12, and several cleaning components. The motor 11 is fixedly installed on the inner wall of the lower end of the filter tank 1, and the rotating shaft 12 is fixedly installed on the upper end of the output end of the motor 11. The rotating shaft 12 rotates sequentially through the impurity filter box 4, the chemical filter box 3, and the molecular filter box 2. Several cleaning components are evenly distributed on the outer wall of the rotating shaft 12 located in the impurity filter box 4. In this embodiment, the cleaning components are set in three groups. The cleaning components include a mounting base 13, a mounting plate 14, and a scraper 15. The mounting base 13 is fixedly installed on the outer wall of the rotating shaft 12, and a rotating rod is fixedly installed on the inner wall of the mounting base 13. The mounting plate 14 is rotatably installed on the outer wall of the rotating rod. Figure 3 A torsion spring 16 is fixedly installed between the mounting base 13 and the mounting plate 14, as shown. Figure 2 The scraper 15 shown is fixedly installed at the front end of the mounting plate 14, and the lower end of the scraper 15 abuts against the upper end of the filter plate 6. The motor 11 is used to drive the rotating shaft 12 to rotate, thereby driving the cleaning component to rotate in the chemical filter box 3. When the scraper 15 rotates with the rotating shaft 12, it uses the elastic force of the torsion spring 16 to stick tightly to the surface of the filter plate 6, continuously scraping away impurities such as calcium hydroxide particles and unreacted calcium hydride powder, thereby avoiding clogging of the filter plate 6 and improving the dewatering efficiency of the electrolyte.
[0026] The stirring assembly also includes several lifting platforms 17, which are evenly arranged on the inner wall of the impurity filter box 4. In this embodiment, three lifting platforms 17 are provided. Figure 2 The lifting platform 17 shown has inclined surfaces at both ends and several grooves 18 in the middle. In this embodiment, there are two grooves 18, which are right-angled trapezoids with the upper base longer than the lower base. During rotation, the scraper 15 first moves to the right-angled side of the groove 18 and then to the inclined side. The mounting plate 14 has a notch at one end near the lifting platform 17, which can slide along the inclined surface and the groove 18. The lifting platform 17 is used to raise the mounting plate 14, thereby raising the scraper 15. When the mounting plate 14 moves to the notch, it descends and collides with the lower end of the notch, causing vibration in the lifting platform 17. The lifting platform 17 then transmits the vibration to the filter plate 6 through the impurity filter box 4, further preventing the filter plate 6 from becoming clogged. At the same time, the scraper 15 also vibrates, shaking off the impurities on the outer wall of the scraper 15 and improving the cleaning efficiency of the scraper 15.
[0027] The rotating shaft 12 is fixedly installed on the outer wall of both the molecular filter box 2 and the chemical filter box 3. In this embodiment, there are four stirring rods 19, and the stirring rods 19 are arc-shaped.
[0028] An arc-shaped cover 20 is fixedly installed on the upper end of the rotating shaft 12, and the arc-shaped cover 20 is located directly below the feed inlet.
[0029] The specific implementation process is as follows:
[0030] Utilizing the physical adsorption properties of molecular sieves, free water molecules in the electrolyte are rapidly captured, laying the foundation for subsequent deep water removal. Calcium hydride can chemically react with hydrogen-bonded water molecules, breaking the hydrogen bonds between water molecules and solvent molecules, converting bound water into reactive free water, which is then completely removed through chemical adsorption. Filter plate 6 effectively intercepts calcium hydroxide particles and unreacted calcium hydride powder produced by chemical filtration, preventing electrolyte contamination due to impurities. The combination of calcium hydride and molecular sieves has a highly efficient removal capability for water in polar organic solvents and does not undergo side reactions with the main components of the electrolyte. This device, through a multi-stage design of "physical adsorption + chemical reaction + impurity filtration," systematically solves the problem of insufficient removal of hydrogen-bonded water by traditional methods, exhibiting significant advantages in water removal efficiency and electrolyte purity assurance.
[0031] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. An organic solvent dehydration device, characterized in that: The system includes a filter tank containing a filtration device. From top to bottom, the filtration device consists of a molecular filter box, a chemical filter box, and an impurity filter box, all connected sequentially via a delivery pipe. The molecular filter box contains a molecular sieve that filters free water from the electrolyte. The chemical filter box contains calcium hydride that reacts with water molecules attached to hydrogen bonds. The impurity filter box contains a filter plate that intercepts impurities generated in the chemical filter box.
2. The organic solvent dehydration device according to claim 1, characterized in that: A gas outlet pipe and a feed pipe are provided between the chemical filter box and the filter barrel. The gas outlet pipe is used to discharge the gas generated by the chemical filter box, and the feed pipe is used to add calcium hydride into the chemical filter box.
3. The organic solvent dehydration device according to claim 2, characterized in that: An outlet pipe is provided between the lower end of the impurity filter box and the filter barrel, and an inlet pipe connected to the molecular filter box is provided at the upper end of the filter barrel.
4. The organic solvent dehydration device according to claim 3, characterized in that: The filtration device also includes a stirring assembly, which includes a motor, a rotating shaft, and several cleaning components. The motor is located on the inner wall of the lower end of the filter barrel, and the rotating shaft is located on the upper end of the motor output end. The rotating shaft rotates sequentially through the impurity filter box, the chemical filter box, and the molecular filter box. Several cleaning components are evenly distributed on the outer wall of the rotating shaft located in the impurity filter box. The cleaning components include a mounting base, a mounting plate, and a scraper. The mounting base is located on the outer wall of the rotating shaft, and the mounting plate is located inside the mounting base. A torsion spring is provided between the mounting base and the mounting plate. The scraper is located at one end of the mounting plate, and the lower end of the scraper abuts against the upper end of the filter plate.
5. The organic solvent dehydration device according to claim 4, characterized in that: The mixing assembly also includes several lifting platforms, which are evenly arranged on the inner wall of the impurity filter box. The two ends of the lifting platforms are set as inclined surfaces, and several grooves are opened in the middle of the lifting platforms. The grooves are set as right-angled trapezoids. The mounting plate has a notch at one end near the lifting platform, and the notch can slide along the inclined surface and the groove.
6. The organic solvent dehydration device according to claim 5, characterized in that: The rotating shaft is located on the outer wall of both the molecular filter box and the chemical filter box, and several stirring rods are provided. The stirring rods are set in an arc shape.
7. The organic solvent dehydration device according to claim 6, characterized in that: An arc-shaped cover is provided at the upper end of the rotating shaft, and the arc-shaped cover is located directly below the feed inlet.