Dehydration device for dimethyl sulfoxide

Abstract

The utility model discloses a dehydration device for dimethyl sulfoxide, and belongs to the technical field of dimethyl sulfoxide production equipment. The device comprises a working tank, a piston buffer assembly and a temperature control assembly, the working tank comprises a shell and a heating unit, a working cavity used for containing dimethyl sulfoxide is formed in the shell, and the heating unit is arranged in the shell; the piston buffering unit comprises a cylinder body and a piston, the cylinder body is connected with the shell and communicated with the working cavity, the piston is slidably connected with the inner wall of the cylinder body, the two ends of the cylinder body are communicated with a vacuum pump through pipelines, and pressure of the vacuum pump acts on the two ends of the piston; the temperature control assembly comprises a sensor used for monitoring the position of the piston, the sensor is electrically connected with the heating unit through a controller, and the heating unit can accelerate or slow down water evaporation to stabilize the distillation efficiency. According to the utility model, the violent change of pressure in the working tank can be hindered, and the distillation separation efficiency is stabilized.

Description

Technical Field

[0001] The utility model relates to the technical field of dimethyl sulfoxide production equipment, in particular to a dimethyl sulfoxide dehydration device. Background Art

[0002] Dimethyl sulfoxide is known as the "universal solvent" because of its high polarity, high boiling point, good thermal stability, non-proton, and miscibility with water. It can be dissolved in most organic substances such as ethanol, propanol, benzene and chloroform. Dimethyl sulfoxide is a sulfur-containing organic compound. It is a colorless, odorless, transparent liquid at room temperature. It is a hygroscopic flammable liquid. At 20°C and when the relative humidity is 60%, it can absorb water equivalent to 70% of its own weight from the air. Therefore, it needs to be dried during production.

[0003] Dimethyl sulfoxide is dehydrated by vacuum distillation. However, during the vacuum distillation process, the evaporated water vapor is added to the internal space, which can increase the pressure in the reaction chamber. The real-time evaporation rate of water varies greatly, making the vacuum pressure unstable. Severe pressure fluctuations can cause changes in the boiling points of dimethyl sulfoxide and water, thereby affecting the separation efficiency of distillation. Utility Model Content

[0004] In view of this, it is necessary to provide a dehydration device for dimethyl sulfoxide to solve the problem of unstable pressure when dimethyl sulfoxide is subjected to reduced pressure distillation.

[0005] The utility model provides a dimethyl sulfoxide dehydration device, comprising:

[0006] A working tank, the working tank comprising a shell and a heating unit, the shell forming a working chamber for containing dimethyl sulfoxide, the heating unit being arranged in the shell;

[0007] A piston buffer assembly, wherein the piston buffer unit comprises a cylinder body and a piston, wherein the cylinder body is connected to the housing and communicates with the working chamber, the piston is slidably connected to the inner wall of the cylinder body, and both ends of the cylinder body are respectively communicated with a vacuum pump through a pipeline, and the pressure of the vacuum pump acts on both ends of the piston respectively;

[0008] A temperature control component includes a sensor for monitoring the position of the piston, wherein the sensor is electrically connected to the heating unit through a controller, and the heating unit can accelerate or slow down the evaporation of water to stabilize the efficiency of distillation.

[0009] Furthermore, the piston is provided with a piston ring, which is sleeved on the piston, the inner side of the piston ring is clamped on the piston, and the outer side of the piston ring is slidably connected to the inner wall of the cylinder body.

[0010] Furthermore, the sensor is an infrared sensor or an ultrasonic sensor, and the sensor is arranged relative to the cylinder body.

[0011] Furthermore, the heating unit includes an annular cavity enclosed in the shell and an electric heater, the annular cavity is embedded in the shell, the electric heater is arranged in the annular cavity, and the electric heater can change the heating efficiency by changing the current size.

[0012] Furthermore, it also includes a negative pressure component, which includes a first suction pipe and a second suction pipe, the first suction pipe is connected to the shell and communicated with the working chamber, the second suction pipe is communicated with an end of the cylinder body away from the shell, the first suction pipe and the second suction pipe are respectively communicated with a vacuum pump, and negative pressure acts on both ends of the piston to keep the piston stationary.

[0013] Furthermore, a discharge port is provided at the bottom of the shell.

[0014] Furthermore, it also includes a stirring component, which includes a stirring paddle rotatably connected to the shell, one end of the stirring paddle extends into the working chamber to stir the dimethyl sulfoxide liquid, and the other end of the stirring paddle is connected to the driving member.

[0015] Furthermore, the housing is provided with a vacuum gauge for measuring the vacuum degree of the working chamber and a temperature gauge for measuring the temperature of the dimethyl sulfoxide liquid.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] (1) The utility model is a dehydration device for dimethyl sulfoxide, which is provided with a piston buffer unit. The piston buffer unit includes a cylinder body and a piston. The cylinder body is connected to the outer shell and communicated with the working chamber. The piston is slidably connected to the inner wall of the cylinder body. The two ends of the cylinder body are respectively connected to the vacuum pump through pipelines. The pressure of the vacuum pump acts on the two ends of the piston respectively. One end of the piston is only affected by the vacuum pump, and the negative pressure remains unchanged. The other end of the piston is affected by the vacuum pump and water vapor. With the change of pressure, the piston can move relatively to keep the pressure at both ends of the piston consistent, so as to achieve the purpose of hindering the pressure change in the working tank and maintain the relative stability of the distillation process.

[0018] (2) The utility model discloses a dehydration device for dimethyl sulfoxide, which is provided with a temperature control component. The temperature control component includes a sensor for monitoring the position of the piston. The sensor is electrically connected to the heating unit through a controller. The sensor can sense the movement of the piston. When the changes in the working tank push the piston to move relatively, the thermal power of the heating unit changes relatively, which changes the evaporation rate of water, so that the pressure is rebalanced and the separation efficiency of the distillation is stabilized. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 The overall structure of the utility model is shown in FIG. Figure 1 ;

[0021] Figure 2 The overall structure of the utility model is shown in FIG. Figure 2 ;

[0022] Figure 3 It is a structural schematic diagram of the piston buffer assembly in the utility model;

[0023] Figure 4 It is a structural schematic diagram of the working tank in the utility model.

[0024] In the figure, 100, working tank; 110, housing; 111, working chamber; 112, discharge port; 120, heating unit; 121, annular chamber; 122, electric heater; 130, vacuum gauge; 140, temperature gauge;

[0025] 200, piston buffer assembly; 210, cylinder body; 220, piston; 221, piston ring;

[0026] 300, temperature control component; 310, sensor;

[0027] 400, negative pressure assembly; 410, first suction pipe; 420, second suction pipe;

[0028] 500, stirring assembly; 510, stirring paddle. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0030] A dimethyl sulfoxide dehydration device in this embodiment relates to the technical field of dimethyl sulfoxide production equipment. By arranging a cylinder body 210 and a piston 220 on a working tank 100, water vapor evaporated from the dimethyl sulfoxide can be buffered, and the evaporation rate can be adjusted by temperature to hinder drastic changes in pressure in the working tank 100, thereby stabilizing the separation efficiency of distillation.

[0031] See also Figures 1 to 4In this embodiment, a dehydration device for dimethyl sulfoxide includes a working tank 100, a piston buffer assembly 200, and a temperature control assembly 300, wherein the working tank 100 is used to store liquid dimethyl sulfoxide and decompress the dimethyl sulfoxide. The piston buffer assembly 200 can change the total volume of the working tank 100, prevent the evaporated water from changing the negative pressure in the working tank 100, and stabilize the separation efficiency of the distillation. The temperature control assembly 300 can negatively feedback the temperature according to the movement of the piston 220, enhance or weaken the evaporation rate of the water in the liquid dimethyl sulfoxide, further hinder the drastic change of the negative pressure in the working tank 100, and stabilize the separation efficiency of the distillation.

[0032] The working tank 100 includes an outer shell 110 and a heating unit 120. A working chamber 111 is formed inside the outer shell 110. Liquid dimethyl sulfoxide containing water is stored in the working chamber 111. The heating unit 120 is arranged in the outer shell 110. The heating unit 120 can heat the liquid dimethyl sulfoxide to promote the evaporation of water and shorten the rate of reduced pressure distillation.

[0033] The piston 220 buffer unit includes a cylinder 210 and a piston 220. The cylinder 210 is connected to the housing 110 and communicated with the working chamber 111. The piston 220 is slidably connected to the inner wall of the cylinder 210. The two ends of the cylinder 210 are respectively communicated with the vacuum pump through pipelines. The pressure of the vacuum pump acts on the two ends of the piston 220. One end of the piston 220 is only affected by the vacuum pump, and the negative pressure remains unchanged. The other end of the piston 220 is affected by the vacuum pump and water vapor. With the change of pressure, the piston 220 can move relatively to keep the pressure at both ends of the piston 220 consistent, so as to achieve the purpose of hindering the pressure change in the working tank 100 and maintain the relative stability of the distillation process.

[0034] The temperature control component 300 includes a sensor 310 for monitoring the position of the piston 220. The sensor 310 is electrically connected to the heating unit 120 through the controller. The sensor 310 can sense the movement of the piston 220. When changes in the working tank 100 push the piston 220 to move relatively, the thermal power of the heating unit 120 changes relatively, changing the evaporation rate of water, so that the pressure is rebalanced, and the separation efficiency of the distillation is stabilized.

[0035] In some embodiments, see Figure 3The piston 220 is provided with a piston ring 221, which is sleeved on the piston 220, the inner side of the piston ring 221 is clamped on the piston 220, and the outer side of the piston ring 221 is slidably connected with the inner wall of the cylinder body 210, forming an effective sealing structure, which can significantly reduce the gap between the piston 220 and the inner wall of the cylinder body 210, thereby reducing gas leakage. Avoiding gas leakage is crucial to maintaining a stable vacuum environment during the vacuum distillation process, which can eliminate factors that interfere with the change of air pressure and maintain the stability of the distillation process.

[0036] In some embodiments, the sensor 310 is an infrared sensor 310 or an ultrasonic sensor 310, and the sensor 310 is arranged relative to the cylinder body 210. The infrared sensor 310 and the ultrasonic sensor 310 are both non-contact measurement devices, which can avoid mechanical wear and improve measurement accuracy and reliability. With the help of the infrared sensor 310 and the ultrasonic sensor 310, the position change of the piston 220 is accurately detected to ensure the accuracy of the data, thereby improving the response accuracy of the entire control system.

[0037] In some embodiments, see Figure 4 The heating unit 120 includes an annular cavity 121 and an electric heater 122 enclosed in the housing 110. The annular cavity 121 is embedded in the housing 110 to form an interlayer. The interlayer is arranged around the interior of the housing 110 to evenly distribute the heating, so that the dimethyl sulfoxide in the working chamber 111 is heated more evenly, avoiding local overheating or overcooling.

[0038] The electric heater 122 is arranged in the annular cavity 121, and can directly heat the inner wall of the cavity, reduce heat loss, and improve heating efficiency. The electric heater directly controls the heating efficiency through the size of the current, can quickly respond to temperature adjustment needs, and accelerate the heat conduction speed of the system.

[0039] In some embodiments, see Figure 1 and Figure 2 The dehydration device of dimethyl sulfoxide also includes a negative pressure component 400, which includes a first suction pipe 410 and a second suction pipe 420. The first suction pipe 410 is connected to the shell 110 and communicates with the working chamber 111, and the second suction pipe 420 is communicated with an end of the cylinder 210 away from the shell 110. The first suction pipe 410 and the second suction pipe 420 are respectively communicated with the vacuum pump.

[0040] The negative pressure assembly 400 is connected to the working chamber 111 and the cylinder body 210 through the first and second suction pipes 420, respectively. The negative pressure applied by the vacuum pump acts on both ends of the piston 220, so that the pressure on both sides of the piston 220 is balanced, thereby keeping the piston 220 stationary. During normal operation, the piston 220 is subjected to balanced force, which can effectively prevent the piston 220 from moving due to pressure differences, thereby ensuring the stability of the system. The negative pressure assembly 400 can balance the pressure fluctuations in the system in a timely manner, reduce the instability caused by pressure changes during the distillation process, and improve the dehydration efficiency.

[0041] In some embodiments, see Figure 1 and Figure 2 A discharge port 112 is provided at the bottom of the shell 110. After the water in the dimethyl sulfoxide in the working tank 100 is completely evaporated, the dimethyl sulfoxide can be released from the bottom of the working tank 100 through the discharge port 112, thereby realizing direct discharge of the dimethyl sulfoxide, which is simple to operate, practical and reliable.

[0042] In some embodiments, see Figure 4 A dehydration device for dimethyl sulfoxide also includes a stirring assembly 500, which includes a stirring paddle 510 rotatably connected to the housing 110, one end of the stirring paddle 510 extends into the working chamber 111, and the other end of the stirring paddle 510 is connected to a driving member, which is a driving motor that can drive the stirring paddle 510 to rotate continuously. The stirring paddle 510 stirs the dimethyl sulfoxide liquid in the working chamber 111, which can make the liquid flow continuously during the heating process, thereby avoiding local overheating or overcooling and achieving uniform heating. Through stirring, the dimethyl sulfoxide liquid contacts the heating surface more fully, and the heat transfer efficiency is improved, thereby accelerating the evaporation process of water and improving the dehydration efficiency.

[0043] At the same time, during the stirring process, the continuous flow of the liquid can prevent impurities or solid particles from settling at the bottom, maintain the uniformity of the liquid, and prevent the formation of crystals or precipitation. Therefore, effective stirring can ensure the purity of the dimethyl sulfoxide liquid and avoid the degradation of product quality due to impurity deposition.

[0044] In some embodiments, see Figure 1 and Figure 2 The housing 110 is provided with a vacuum gauge 130 and a thermometer 140. The vacuum gauge 130 is installed on the housing 110 and can directly measure the vacuum degree in the working tank 100, reflecting the real-time negative pressure in the working tank 100, ensuring that the system always operates under the best vacuum conditions, which helps to optimize the distillation and dehydration process. The thermometer 140 is installed on the housing 110 and can directly measure the temperature of the liquid dimethyl sulfoxide in the working tank 100 to ensure the accuracy and stability of the heating process.

[0045] Workflow: First, inject liquid dimethyl sulfoxide into the working tank 100, start the vacuum pump, so that the piston 220 is located in the middle of the cylinder 210 and maintains balance. Next, energize the electric heater 122 to heat the liquid dimethyl sulfoxide. When the water in the liquid dimethyl sulfoxide boils excessively, the pressure in the working tank 100 increases, the piston 220 is pushed, the total volume of the gas increases, and the pressure is partially reduced. The sensor 310 senses the movement of the piston 220, and slightly reduces the current of the electric heater 122 through the controller to suppress the boiling of the water in the liquid dimethyl sulfoxide, so that the piston 220 is restored and balanced again. When the water in the liquid dimethyl sulfoxide boils too slowly, the pressure in the working tank 100 is weakened, the piston 220 is pushed, the total volume of the gas is reduced, and the pressure is partially increased. The sensor 310 senses the movement of the piston 220, and slightly increases the current of the electric heater 122 through the controller to promote the boiling of the water in the liquid dimethyl sulfoxide, so that the piston 220 is restored and balanced again.

[0046] The above description is only a preferred specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be covered by the present invention.

Claims

1. A dehydration device for dimethyl sulfoxide, characterized in that: include: A working tank, the working tank comprising a shell and a heating unit, the shell forming a working chamber for containing dimethyl sulfoxide, the heating unit being arranged in the shell; A piston buffer assembly, wherein the piston buffer unit comprises a cylinder body and a piston, wherein the cylinder body is connected to the housing and communicates with the working chamber, the piston is slidably connected to the inner wall of the cylinder body, and both ends of the cylinder body are respectively communicated with a vacuum pump through a pipeline, and the pressure of the vacuum pump acts on both ends of the piston respectively; A temperature control component includes a sensor for monitoring the position of the piston, wherein the sensor is electrically connected to the heating unit through a controller, and the heating unit can accelerate or slow down the evaporation of water to stabilize the efficiency of distillation.

2. A dimethyl sulfoxide dehydration device according to claim 1, characterized in that: The piston is provided with a piston ring, which is sleeved on the piston. The inner side of the piston ring is clamped on the piston, and the outer side of the piston ring is slidably connected to the inner wall of the cylinder body.

3. A dimethyl sulfoxide dehydration device according to claim 1, characterized in that: The sensor is an infrared sensor or an ultrasonic sensor, and the sensor is arranged relative to the cylinder body.

4. A dimethyl sulfoxide dehydration device according to claim 1, characterized in that: The heating unit comprises an annular cavity enclosed in the shell and an electric heater. The annular cavity is embedded in the shell, and the electric heater is arranged in the annular cavity. The electric heater can change the heating efficiency by changing the current.

5. A dimethyl sulfoxide dehydration device according to claim 1, characterized in that: It also includes a negative pressure component, which includes a first suction pipe and a second suction pipe. The first suction pipe is connected to the shell and communicates with the working chamber, and the second suction pipe is communicated with an end of the cylinder body away from the shell. The first suction pipe and the second suction pipe are respectively communicated with a vacuum pump, and negative pressure acts on both ends of the piston to keep the piston stationary.

6. A dimethyl sulfoxide dehydration device according to claim 1, characterized in that: A discharge port is arranged at the bottom of the shell.

7. A dimethyl sulfoxide dehydration device according to claim 1, characterized in that: It also includes a stirring component, which includes a stirring paddle rotatably connected to the shell, one end of the stirring paddle extends into the working chamber for stirring the dimethyl sulfoxide liquid, and the other end of the stirring paddle is connected to the driving member.

8. The dehydration device of dimethyl sulfoxide according to claim 1, characterized in that: The housing is provided with a vacuum gauge for measuring the vacuum degree of the working chamber and a temperature gauge for measuring the temperature of the dimethyl sulfoxide liquid.

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