A sampling device for vacuum membrane distillation

Abstract

This utility model discloses a sampling device for vacuum membrane distillation, relating to the field of vacuum membrane distillation technology. It includes a support frame, a sampling container mounted on the support frame, and a connector on the sampling container for connection to a vacuum membrane distillation condenser. It also includes a conical hopper positioned below the sampling container, with a sealing plate at the outlet end of the hopper. A connecting plate is mounted on the sealing plate, and one end of the connecting plate has a control mechanism for controlling its movement. A control valve is mounted on the sampling container for opening or closing it. A connecting pipe is fixedly connected to the sampling container, and a vacuum pump is mounted at the end of the connecting pipe furthest from the sampling container, with the vacuum pump fixedly connected to the support frame. This sampling device for vacuum membrane distillation allows the distillation apparatus to remain under vacuum during condensate extraction, thereby improving distillation efficiency and product quality.

Description

Technical Field

[0001] This utility model relates to the field of vacuum membrane distillation technology, specifically to a sampling device for vacuum membrane distillation. Background Technology

[0002] In modern industry and scientific research, membrane distillation utilizes the vapor pressure difference across a hydrophobic microporous membrane as the driving force for mass transfer. This allows vapor molecules on the hot side to pass through the membrane pores and condense into a liquid phase on the cold side, thus separating the solute from the solvent in a solution. Vacuum membrane distillation, as an important form of membrane distillation technology, further increases the vapor pressure difference across the membrane by maintaining a vacuum on the cold side. This effectively enhances the driving force for mass transfer, significantly improves distillation efficiency, reduces operating temperature, and decreases energy consumption. Simultaneously, it avoids the damage of heat-sensitive substances caused by high temperatures. Therefore, it has significant application value in seawater desalination, brackish water desalination, high-concentration organic wastewater treatment, and the extraction of high-purity substances in the food and pharmaceutical industries.

[0003] In the actual operation of vacuum membrane distillation, in order to accurately evaluate the distillation effect, monitor the changes in the composition of substances during the distillation process, and ensure the quality of the final product, it is necessary to regularly sample and analyze the condensate. As a product of the distillation process, the composition and properties of the condensate directly reflect the transfer and separation of substances during the distillation process. By sampling and testing the condensate, we can understand the operating status of the distillation equipment in a timely manner, adjust the operating parameters, and ensure that the distillation process is carried out efficiently and stably.

[0004] However, during the sampling process, outside air can easily enter the distillation equipment from the sampling point under pressure, which can lead to unstable vacuum in local areas or even the entire system, thereby reducing distillation efficiency and product quality.

[0005] Therefore, in order to address the above problems, the applicant needs to design a sampling device for vacuum membrane distillation to solve the problem. Utility Model Content

[0006] The purpose of this invention is to provide a sampling device for vacuum membrane distillation to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a sampling device for vacuum membrane distillation, comprising a support frame, a sampling container mounted on the support frame, and a connector for connecting to a vacuum membrane distillation condenser on the sampling container.

[0008] It also includes: a conical hopper located below the sampling tank, with a sealing plate at the outlet end of the conical hopper; a connecting plate fixedly mounted on the sealing plate; a control mechanism located at the end of the connecting plate away from the sealing plate; the control mechanism including a servo motor; a threaded rod at the output end of the servo motor; a moving block threaded onto the threaded rod; the moving block being fixedly connected to the connecting plate; a control valve on the sampling tank for opening or closing the sampling tank; a connecting pipe fixedly connected to the sampling tank; a vacuum pump located at the end of the connecting pipe away from the sampling tank; and the vacuum pump being fixedly connected to a support frame.

[0009] Furthermore, a stabilizing seat is provided at the end of the threaded rod away from the servo motor, and the stabilizing seat is fixedly connected to the support frame.

[0010] Furthermore, a limiting rod is fixedly installed on the stabilizing base. The end of the limiting rod away from the stabilizing base slides through the moving block and is fixedly connected to a fixing rod, and the fixing rod is fixedly connected to the support frame.

[0011] Furthermore, a connecting seat is fixedly installed on the servo motor, and the connecting seat is fixedly connected to the support frame.

[0012] Furthermore, the control valve includes a mounting ring fixedly connected to the inner wall of the sampling tank, and a rotating rod is rotatably provided on the inner side of the mounting ring, with a rotating plate fixedly provided on the rotating rod.

[0013] Furthermore, the end of the rotating rod away from the mounting ring rotates through the mounting ring and is fixedly provided with a control handle, which is used to drive the rotating rod to rotate.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the sampling device for vacuum membrane distillation allows the distillation apparatus to remain under vacuum while extracting condensate, thereby improving distillation efficiency and product quality. The specific details are as follows:

[0015] When using this vacuum membrane distillation sampling device, to take a sample, turn the control handle. The control handle will drive the rotating rod to rotate, which in turn will drive the rotating plate to rotate. The rotating plate will close the sampling container. Then, start the control mechanism, which will move the sealing plate to allow the condensate in the conical hopper to flow out. After the condensate sampling is complete, restart the control mechanism to seal the conical hopper. Then, start the vacuum pump to draw air out of the sampling container. After the air is completely drawn out, reopen the control valve. This ensures that the distillation device remains under vacuum during condensate extraction, improving distillation efficiency and product quality.

[0016] When using this vacuum membrane distillation sampling device, if it is necessary to move the sealing plate, the servo motor is started. The servo motor will drive the threaded rod to rotate. Under the action of the limit rod, the moving block will move linearly. The movement of the moving block will drive the connecting plate to move, and the movement of the connecting plate will drive the sealing plate to move. It is easy to operate and has high working efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the present invention. Figure 2 ;

[0019] Figure 3 This is a three-dimensional structural diagram of the control mechanism of this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the control valve of this utility model.

[0021] In the diagram: 1. Support frame; 2. Control mechanism; 10. Sampling tank; 11. Control valve; 12. Connector; 13. Conical hopper; 14. Sealing plate; 15. Connecting plate; 16. Vacuum pump; 17. Connecting pipe; 20. Servo motor; 21. Threaded rod; 22. Moving block; 23. Stabilizing seat; 24. Limiting rod; 25. Fixing rod; 26. Connecting seat; 110. Mounting ring; 111. Rotating rod; 112. Rotating plate; 113. Control handle. Detailed Implementation

[0022] 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.

[0023] like Figures 1-4As shown, a sampling device for vacuum membrane distillation according to this utility model includes a support frame 1, a sampling tank 10 on the support frame 1, and a connector 12 connected to a vacuum membrane distillation condenser on the sampling tank 10; a conical hopper 13 located below the sampling tank 10, with a sealing plate 14 at the liquid outlet end of the conical hopper 13; a connecting plate 15 fixedly mounted on the sealing plate 14; a control mechanism 2 located at the end of the connecting plate 15 away from the sealing plate 14; the control mechanism 2 includes a servo motor 20, with a threaded rod 21 at the output end of the servo motor 20; a moving block 22 threadedly mounted on the threaded rod 21; the moving block 22 fixedly connected to the connecting plate 15; a control valve 11 on the sampling tank 10 for opening or closing the sampling tank 10; a connecting pipe 17 fixedly connected to the sampling tank 10; a vacuum pump 16 located at the end of the connecting pipe 17 away from the sampling tank 10; and the vacuum pump 16 fixedly connected to the support frame 1.

[0024] A stabilizing seat 23 is provided at the end of the threaded rod 21 away from the servo motor 20, and the stabilizing seat 23 is fixedly connected to the support frame 1. By providing a stabilizing seat 23 fixed to the support frame 1 at the end of the threaded rod 21, the support rigidity of the threaded rod 21 is enhanced.

[0025] A limiting rod 24 is fixedly installed on the stabilizing base 23. The end of the limiting rod 24 away from the stabilizing base 23 slides through the moving block 22 and is fixedly connected to a fixing rod 25. The fixing rod 25 is fixedly connected to the support frame 1. The addition of the limiting rod 24 that passes through the moving block 22 and the fixing rods 25 fixed at both ends creates a rigid guiding structure, which forces the moving block 22 to only move axially along the limiting rod 24, thus completely eliminating the radial offset or torsion that may occur in the moving block 22 during the threaded transmission process.

[0026] A connecting seat 26 is fixedly installed on the servo motor 20, and the connecting seat 26 is fixedly connected to the support frame 1. The servo motor 20 is rigidly fixed on the support frame 1 through the connecting seat 26, which significantly improves the stability of the motor installation.

[0027] The control valve 11 includes a mounting ring 110 fixedly connected to the inner wall of the sampling container 10. A rotating rod 111 is rotatably arranged on the inner side of the mounting ring 110, and a rotating plate 112 is fixedly arranged on the rotating rod 111. The rotating plate 112 is fitted with the plane of the mounting ring 110 to achieve sealing, which greatly reduces the number of sealing joints and significantly reduces potential leakage points at the valve. When the rotating plate 112 is closed, it forms a large-area tight contact with the mounting ring 110, which can effectively block the gas exchange between the inside and outside of the sampling container 10, effectively prevent the sampling container 10 from becoming a weak link in vacuum failure, and improve vacuum stability.

[0028] The end of the rotating rod 111 away from the mounting ring 110 rotates through the mounting ring 110 and is fixedly equipped with a control handle 113. The control handle 113 is used to drive the rotating rod 111 to rotate. The control handle 113 is integrated at the end of the rotating rod 111, making the valve operation intuitive and convenient. Operators can quickly open and close the valve without tools, which greatly shortens the valve opening time during sampling.

[0029] Working principle: When using this vacuum membrane distillation sampling device, when sampling is required, rotate the control handle 113. The control handle 113 will drive the rotating rod 111 to rotate, which in turn will drive the rotating plate 112 to rotate. The rotation of the rotating plate 112 will close the sampling tank 10. Then, start the servo motor 20, which will drive the threaded rod 21 to rotate. Under the action of the limit rod 24, the moving block 22 will move linearly. The movement of the moving block 22 will drive the connecting plate 15 to move, which in turn will drive the sealing plate 14 to move, causing the condensate in the conical hopper 13 to flow out. After the condensate sampling is completed, restart the control mechanism 2, so that the sealing plate 14 seals the conical hopper 13. Then, start the vacuum pump 16, which will suck up the air in the sampling tank 10. After the air is sucked up, reopen the control valve 11, so that the distillation device is continuously in a vacuum state when extracting the condensate, thereby improving distillation efficiency and product quality.

[0030] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A sampling device for vacuum membrane distillation, comprising a support frame (1), wherein a sampling container (10) is provided on the support frame (1), and a connector (12) for connecting to a vacuum membrane distillation condenser is provided on the sampling container (10). characterized in that Also includes: A conical hopper (13) is set below the sampling tank (10), and a sealing plate (14) is provided at the liquid outlet end of the conical hopper (13). A connecting plate (15) is fixedly provided on the sealing plate (14), and a control mechanism (2) is provided at the end of the connecting plate (15) away from the sealing plate (14). The control mechanism (2) includes a servo motor (20), and a threaded rod (21) is provided at the output end of the servo motor (20). A moving block (22) is threaded on the threaded rod (21), and the moving block (22) is fixedly connected to the connecting plate (15). A control valve (11) is provided on the sampling tank (10), and the control valve (11) is used to open or close the sampling tank (10). A connecting pipe (17) is fixedly connected to the sampling tank (10), and a vacuum pump (16) is provided at the end of the connecting pipe (17) away from the sampling tank (10), and the vacuum pump (16) is fixedly connected to the support frame (1).

2. A sampling device for vacuum membrane distillation according to claim 1, characterized in that: The threaded rod (21) is provided with a stabilizing seat (23) at the end away from the servo motor (20), and the stabilizing seat (23) is fixedly connected to the support frame (1).

3. A sampling device for vacuum membrane distillation according to claim 2, characterized in that: A limiting rod (24) is fixedly installed on the stabilizing base (23). The end of the limiting rod (24) away from the stabilizing base (23) slides through the moving block (22) and is fixedly connected to a fixing rod (25). The fixing rod (25) is fixedly connected to the support frame (1).

4. A sampling device for vacuum membrane distillation according to claim 1, characterized in that: A connecting seat (26) is fixedly installed on the servo motor (20), and the connecting seat (26) is fixedly connected to the support frame (1).

5. A sampling device for vacuum membrane distillation according to claim 1, characterized in that: The control valve (11) includes a mounting ring (110) fixedly connected to the inner wall of the sampling tank (10). A rotating rod (111) is rotatably provided on the inner side of the mounting ring (110), and a rotating plate (112) is fixedly provided on the rotating rod (111).

6. A sampling device for vacuum membrane distillation according to claim 5, characterized in that: The end of the rotating rod (111) away from the mounting ring (110) rotates through the mounting ring (110) and is fixedly provided with a control handle (113), and the control handle (113) is used to drive the rotating rod (111) to rotate.

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