Efficient condensing device for distillation process of perfluoropolyether

Abstract

The utility model relates to the technical field of distillation gas condensation, in particular to an efficient condensing device for a perfluoropolyether distillation process. Comprising a condensation box body, a gas inlet pipe is installed at one end of the condensation box body, a liquid outlet pipe is installed at the other end of the condensation box body, and a gas return assembly used for recycling uncondensed gas is installed on the liquid outlet pipe; due to the arrangement of the gas return assembly, when distillation steam is not completely condensed in the condensation assembly, uncondensed gas can flow back to the gas inlet pipe from the liquid outlet pipe through the gas return pipe, and recycling of the uncondensed gas is achieved. Raw material loss caused by direct emission of uncondensed gas is avoided, and the production cost is effectively reduced; meanwhile, pollution possibly caused by emission of uncondensed gas to the environment is reduced, and the environmental protection requirement is met.

Description

Technical Field

[0001] This utility model belongs to the field of distillation gas condensation technology, and specifically relates to a high-efficiency condensation device for perfluoropolyether distillation process. Background Technology

[0002] Perfluoropolyethers (PFPEs) are high-performance synthetic lubricants widely used in aerospace, semiconductor, and chemical industries. In the production process of PFPEs, distillation is a crucial step in separation and purification, and the condenser, as a key component of the distillation system, directly affects the recovery rate and product quality of PFPEs.

[0003] A search revealed that prior art patent application CN202321185288.5 discloses a cooling device for extracting perfluoropolyether liquid, including a water-cooled box, an inlet pipe, and an outlet pipe, as well as a condensation assembly. The condensation assembly is disposed within the water-cooled box and includes a pair of branch pipes and multiple cooling pipes, with the cooling pipes fixedly connected between the two branch pipes. By introducing the distilled gas from the perfluoropolyether liquid into the branch pipes, the gas flow is dispersed and cooled simultaneously in the multiple cooling pipes, increasing the cooling area and significantly improving cooling efficiency. The overall structure is compact, occupies little space, and is convenient for installation and maintenance.

[0004] However, the aforementioned cooling device for extracting perfluoropolyether liquid still has the following drawbacks:

[0005] This device typically lacks gas recovery functionality. When the distilled gas is not completely condensed in the cooling tube, a small amount of uncondensed gas directly enters the collection pipeline. The uncondensed gas is discharged directly without being recovered, which not only leads to increased raw material losses and production costs but may also cause environmental pollution.

[0006] Therefore, we need to propose a high-efficiency condensation device for the perfluoropolyether distillation process to solve the above problems. Utility Model Content

[0007] The purpose of this invention is to provide a high-efficiency condensation device for the distillation process of perfluoropolyethers. Through the inclusion of a return gas assembly, when the distillation vapor is not completely condensed within the condensation assembly, the uncondensed gas can flow back from the liquid outlet pipe to the gas inlet pipe via the return gas pipe, achieving the recovery and reuse of the uncondensed gas. This avoids raw material loss caused by the direct emission of uncondensed gas, effectively reducing production costs. Simultaneously, it reduces potential environmental pollution caused by the emission of uncondensed gas, meeting environmental protection requirements and solving the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency condensation device for perfluoropolyether distillation process, comprising a condensation chamber, wherein a condensation component for cooling distillation vapor is installed inside the condensation chamber, a cooling circulation component for maintaining the condensation component at a low temperature is installed on the side wall of the condensation chamber, an inlet pipe is installed at one end of the condensation chamber, and a liquid outlet pipe is installed at the other end of the condensation chamber, wherein a return gas component for recovering uncondensed gas is installed on the liquid outlet pipe;

[0009] The return air assembly includes a return air pipe, one end of which is installed on the liquid outlet pipe and the other end of which is installed on the air inlet pipe.

[0010] Furthermore, a one-way valve is provided inside the return air pipe, and the one-way valve is located at the end of the return air pipe near the intake air pipe.

[0011] Furthermore, the condensation assembly includes a condenser tube and a cooling medium. The condenser tube is disposed inside the condensation chamber, and its two ends are respectively connected to an air inlet pipe and a liquid outlet pipe. The condenser tube has a spiral structure, and the cooling medium is disposed inside the condensation chamber.

[0012] Furthermore, the cooling circulation assembly includes a cooling box, which is installed on the side wall of the condenser body, and both ends of the cooling box are connected to the condenser body via connecting pipes.

[0013] Furthermore, the cooling circulation assembly also includes a temperature sensor, which is mounted on the inner wall of the condenser housing.

[0014] Furthermore, a refrigeration mechanism is provided inside the cooling box, and a circulation pump is installed at one end of the cooling box, which is connected to a set of connecting pipes.

[0015] Furthermore, the cooling mechanism includes a semiconductor cooling chip, which is mounted on one inner wall of the cooling box.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model, through the setting of the return gas component, allows uncondensed gas to flow back from the liquid outlet pipe to the gas inlet pipe when the distillation steam is not completely condensed in the condensation component, thus realizing the recovery and reuse of uncondensed gas. This avoids the raw material loss caused by the direct emission of uncondensed gas, effectively reducing production costs; at the same time, it reduces the potential pollution to the environment caused by the emission of uncondensed gas, meeting environmental protection requirements.

[0018] 2. This invention, through the design of a cooling circulation component, allows the refrigeration mechanism within the cooling chamber to cool the cooling medium based on temperature information from the condenser chamber, ensuring the cooling medium remains at a low temperature and providing a favorable cooling environment for the condenser components. A circulation pump delivers the low-temperature cooling medium from the cooling chamber to the condenser chamber via connecting pipes. After heat exchange with the distilled vapor in the condenser tubes, the medium flows back to the cooling chamber for further cooling, repeating this cycle continuously to ensure the condenser components are always in a highly efficient cooling state. This cooling circulation system precisely controls the temperature and flow rate of the cooling medium, guaranteeing the stability and continuity of the condensation process and effectively improving the overall performance of perfluoropolyether distillation condensation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of one side of the condenser box according to an embodiment of the present invention is shown;

[0021] Figure 2 A schematic diagram of the structure on the other side of the condenser box according to an embodiment of the present invention is shown;

[0022] Figure 3 A schematic diagram of the internal structure of the condenser box according to an embodiment of the present invention is shown.

[0023] In the diagram: 110, condenser box; 120, air inlet pipe; 130, liquid outlet pipe; 210, air return pipe; 310, cooling box; 320, connecting pipe; 330, circulating pump; 340, temperature sensor; 410, condenser tube. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Please see Figure 1-3 This utility model provides a technical solution:

[0026] A high-efficiency condensation device for perfluoropolyether distillation process.

[0027] The system includes a condenser housing 110, which houses a condenser assembly for cooling distilled vapor. A cooling circulation assembly for maintaining the condenser assembly at a low temperature is installed on the side wall of the condenser housing 110. An inlet pipe 120 is installed at one end of the condenser housing 110, and a liquid outlet pipe 130 is installed at the other end. A return gas assembly for recovering uncondensed gas is installed on the liquid outlet pipe 130.

[0028] The condenser housing 110, as the core carrier of the entire device, is typically made of high-temperature and corrosion-resistant metal materials (such as stainless steel). Its interior forms a closed space, providing a stable environment for the condensation process. The condensation assembly is the key component for cooling and liquefying distillation vapor. Through synergy with the cooling medium, it converts high-temperature vapor into liquid perfluoropolyether. The cooling circulation assembly continuously provides the condensation assembly with a low-temperature cooling medium, maintaining the low-temperature conditions required for the condensation process and ensuring condensation efficiency. The inlet pipe 120 introduces perfluoropolyether vapor generated from the distillation equipment, while the outlet pipe 130 discharges the condensed liquid perfluoropolyether. The return gas assembly recovers any incompletely condensed gas in the outlet pipe 130, returning it to the distillation process for further treatment, improving the perfluoropolyether recovery rate and reducing raw material waste. All components work together to form a complete and efficient condensation recovery system.

[0029] The return air assembly includes a return air pipe 210, one end of which is installed on the liquid outlet pipe 130, and the other end of which is installed on the air inlet pipe 120.

[0030] The return gas pipe 210 is typically made of temperature- and pressure-resistant metal or special plastic tubing. Its diameter is rationally designed according to the gas flow rate and pressure to ensure smooth gas flow. One end of the return gas pipe 210 is connected to the liquid outlet pipe 130 to collect the uncondensed perfluoropolyether gas; the other end is connected to the gas inlet pipe 120, allowing the recovered gas to re-enter the condensation device for secondary condensation. This connection method forms a gas circulation loop, reusing uncondensed gas that might otherwise be directly discharged or wasted, improving the utilization rate of perfluoropolyether, reducing production costs, and also reducing potential environmental pollution, thus meeting the energy conservation and emission reduction requirements in industrial production.

[0031] A one-way valve is provided inside the return air pipe 210, and the one-way valve is located at the end of the return air pipe 210 near the intake pipe 120.

[0032] A check valve is a valve with unidirectional flow characteristics, typically employing a spring-loaded or gravity-operated structure. In the return gas pipe 210, the check valve is installed near the inlet pipe 120. Its function is to ensure that gas can only flow from the outlet pipe 130 to the inlet pipe 120, preventing vapor in the inlet pipe 120 from flowing back into the outlet pipe 130 and interfering with the normal condensation and liquid discharge process. When the pressure of the uncondensed gas in the outlet pipe 130 is greater than the vapor pressure in the inlet pipe 120, the check valve opens, allowing gas to smoothly pass through the return gas pipe 210 into the inlet pipe 120. When the pressure conditions are reversed, the check valve closes under the force of the spring or its own gravity, preventing reverse gas flow. The check valve ensures the normal operation of the return gas assembly, maintains the stability and directionality of gas flow within the device, and avoids reduced condensation efficiency or equipment malfunction due to gas backflow.

[0033] The condensation assembly includes a condenser tube 410 and a cooling medium. The condenser tube 410 is disposed inside the condensation chamber 110. The two ends of the condenser tube 410 are respectively connected to the air inlet pipe 120 and the liquid outlet pipe 130. The condenser tube 410 has a spiral structure. The cooling medium is disposed inside the condensation chamber 110.

[0034] The condenser tube 410 is typically made of a metal material with good thermal conductivity (such as copper). Its spiral design significantly increases the contact area and contact time between the condenser tube 410 and the cooling medium, improving heat exchange efficiency. One end of the condenser tube 410 is connected to the inlet pipe 120 to receive the high-temperature perfluoropolyether vapor generated during distillation; the other end is connected to the outlet pipe 130 to discharge the condensed liquid perfluoropolyether. The cooling medium is generally a coolant or chilled brine, filling the condenser chamber 110 and surrounding the condenser tube 410. When the high-temperature vapor flows within the condenser tube 410, heat is transferred to the cooling medium through the tube wall, gradually cooling and liquefying the vapor, thus realizing the transformation of the perfluoropolyether from a gaseous to a liquid state. The close fit between the spiral condenser tube 410 and the cooling medium maximizes the condensation effect per unit space, effectively improving the condensation efficiency of the perfluoropolyether.

[0035] The cooling circulation assembly includes a cooling box 310, which is installed on the side wall of the condenser box 110. Both ends of the cooling box 310 are connected to the condenser box 110 through connecting pipes 320.

[0036] The cooling chamber 310 is the core component of the cooling circulation assembly. It typically uses a heat-insulating material for its outer shell and contains an internal cooling space for cooling the cooling medium. The cooling chamber 310 is connected to the condenser chamber 110 via a connecting pipe 320. This connecting pipe 320 is made of temperature-resistant, pressure-resistant, and corrosion-resistant piping to ensure that the cooling medium does not leak or become contaminated during circulation. The cooling medium absorbs heat from the condenser tube 410 within the condenser chamber 110, causing its temperature to rise. It then flows back into the cooling chamber 310 through the connecting pipe 320 for cooling. The cooled medium then returns to the condenser chamber 110 through another connecting pipe 320 to continue cooling the vapor in the condenser tube 410. This circulating connection method allows for continuous recycling of the cooling medium, ensuring that the condenser assembly always operates at a low temperature, maintaining efficient condensation and preventing a decrease in condensation efficiency due to an increase in the cooling medium temperature.

[0037] The cooling cycle assembly also includes a temperature sensor 340, which is mounted on the inner wall of the condenser housing 110.

[0038] Temperature sensor 340, a high-precision, fast-response type (such as a thermocouple or resistance temperature detector), is installed on the inner wall of the condenser chamber 110 and can monitor the temperature of the cooling medium inside the condenser chamber 110 in real time. Temperature sensor 340 converts the detected temperature signal into an electrical signal and transmits it to the control system. When the cooling medium temperature exceeds a set threshold, the control system issues a command to activate the refrigeration mechanism inside the cooling chamber 310 or adjust the operating parameters of the circulation pump 330 to enhance the cooling of the cooling medium or accelerate its circulation speed, ensuring that the cooling medium is always maintained within a suitable temperature range. This provides a stable low-temperature environment for the condensation components, ensuring the efficient and stable operation of the perfluoropolyether condensation process.

[0039] The cooling box 310 is equipped with a refrigeration mechanism, and a circulation pump 330 is installed at one end of the cooling box 310. The circulation pump 330 is connected to one set of connecting pipes 320.

[0040] The refrigeration mechanism is the core device for achieving the cooling function of the cooling box 310, and its function is to reduce the temperature of the cooling medium. The circulating pump 330, as the power source for the circulation of the cooling medium, is installed at one end of the cooling box 310 and connected to the condenser box 110 via a connecting pipe 320. When the circulating pump 330 starts, it draws the heated cooling medium from the condenser box 110 into the cooling box 310. After being cooled by the refrigeration mechanism, the low-temperature cooling medium is pumped back to the condenser box 110. The flow rate and head of the circulating pump 330 are selected according to the cooling requirements of the device to ensure that the cooling medium can circulate between the condenser box 110 and the cooling box 310 at a suitable speed and pressure. This allows the cooling medium to promptly remove the heat transferred by the condenser tube 410, maintain the low-temperature operating state of the condensing components, and ensure the continuous and efficient operation of the perfluoropolyether distillation and condensation process.

[0041] The refrigeration mechanism includes a semiconductor refrigeration chip, which is mounted on one inner wall of the cooling box 310.

[0042] The thermoelectric cooler operates based on the Peltier effect and is made of semiconductor materials. It boasts advantages such as small size, high cooling efficiency, and no moving mechanical parts. The thermoelectric cooler is mounted on one inner wall of the cooling chamber 310 and is powered by a DC power supply. When current passes through the thermoelectric cooler, one side absorbs heat, becoming the cold surface, while the other side releases heat, becoming the hot surface. The cold surface contacts the cooling medium, absorbing its heat and cooling it down; the hot surface dissipates heat to the external environment through heat sinks and fans. By adjusting the operating current of the thermoelectric cooler, the cooling capacity can be precisely controlled to meet the cooling medium's cooling requirements under different operating conditions, providing a stable cooling effect for the cooling circulation components and ensuring the efficient operation of the perfluoropolyether distillation and condensation unit.

[0043] Specifically, the internal electrical connection structure, specific structure, and model of the semiconductor cooling chip and the circulating pump 330 are well known to those skilled in the art and will not be described in detail here. All electrical components appearing in this application are connected to an external power source during use.

[0044] The circuits, electrical components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The scope of protection of this utility model does not involve any improvement to the software.

[0045] The control method described in this application is automatic control via a controller. The controller's control circuit can be easily implemented by those skilled in the art through simple programming, and is common knowledge in the field. Furthermore, since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0046] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-efficiency condensation device for a perfluoropolyether distillation process, characterized in that: The system includes a condenser housing (110), which is equipped with a condenser assembly for cooling distilled steam. A cooling circulation assembly for maintaining the condenser assembly at a low temperature is installed on the side wall of the condenser housing (110). An air inlet pipe (120) is installed at one end of the condenser housing (110), and a liquid outlet pipe (130) is installed at the other end of the condenser housing (110). A return gas assembly for recovering uncondensed gas is installed on the liquid outlet pipe (130). The return air assembly includes a return air pipe (210), one end of which is installed on the liquid outlet pipe (130), and the other end of which is installed on the air inlet pipe (120).

2. The high-efficiency condenser for the perfluoropolyether distillation process according to claim 1, characterized in that: A one-way valve is provided inside the return air pipe (210), and the one-way valve is located at the end of the return air pipe (210) near the intake pipe (120).

3. The high-efficiency condenser for the perfluoropolyether distillation process according to claim 2, characterized in that: The condensation assembly includes a condenser tube (410) and a cooling medium. The condenser tube (410) is disposed inside the condensation chamber (110). The two ends of the condenser tube (410) are respectively connected to the air inlet pipe (120) and the liquid outlet pipe (130). The condenser tube (410) has a spiral structure. The cooling medium is disposed inside the condensation chamber (110).

4. The high-efficiency condenser for the perfluoropolyether distillation process according to claim 3, characterized in that: The cooling circulation assembly includes a cooling box (310), which is installed on the side wall of the condenser body (110). Both ends of the cooling box (310) are connected to the condenser body (110) through connecting pipes (320).

5. The high-efficiency condenser for the perfluoropolyether distillation process according to claim 4, characterized in that: The cooling cycle assembly also includes a temperature sensor (340) mounted on the inner wall of the condenser housing (110).

6. The high-efficiency condenser for a perfluoropolyether distillation process according to claim 5, characterized in that: The cooling box (310) is equipped with a refrigeration mechanism. A circulation pump (330) is installed at one end of the cooling box (310), and the circulation pump (330) is connected to a set of connecting pipes (320).

7. The high-efficiency condenser for a perfluoropolyether distillation process according to claim 6, characterized in that: The refrigeration mechanism includes a semiconductor refrigeration chip, which is mounted on the inner wall of one side of the cooling box (310).

Images