Phase separation system of tetrafluoroethane

Abstract

The invention relates to the technical field of tetrafluoroethane production, and discloses a tetrafluoroethane phase separation system which comprises a main phase separator, the main phase separator is connected with a preheater, the preheater is connected with a cooler, the cooler is connected with a circulating pump, and the circulating pump is connected with a buffer tank; the main phase separator is connected with a light phase storage tank, and the light phase storage tank is connected with a light phase delivery pump I and a light phase delivery pump II; the main phase separator is connected with a heavy phase storage tank, and the heavy phase storage tank is connected with a heavy phase delivery pump I and a heavy phase delivery pump II; and the main phase separator is also connected with an online component analyzer, and the online component analyzer can detect the component proportion of each phase of tetrafluoroethane in the phase separator in real time so as to accurately regulate and control the phase separation process according to the detection result. Through a plurality of innovative assemblies and connection modes, the phase separation device has remarkable beneficial effects in the aspects of precise regulation and control of the phase separation process, product purity improvement, impurity removal, energy recycling, heavy phase treatment and the like.

Description

Technical Field

[0001] The present invention relates to the technical field, and specifically to a phase separation system for tetrafluoroethane. Background Art

[0002] Tetrafluoroethane (HFC-134a) is an important refrigerant, foaming agent, etc., and has a wide range of applications in industries such as refrigeration, air conditioning, and automobiles. With the development of these industries, the quality requirements for tetrafluoroethane are getting higher and higher. For example, in a refrigeration system, impurities in tetrafluoroethane may affect the refrigeration efficiency and cause problems such as equipment corrosion; in the application of foaming agents, impurities may affect the foaming quality. Therefore, an efficient tetrafluoroethane treatment system is needed to meet the high-quality requirements.

[0003] Traditional tetrafluoroethane phase separation systems have many deficiencies. During the phase separation process, it is often difficult to precisely control the separation ratio and quality of each phase, resulting in low product purity. Traditional systems have poor removal effects on trace impurity gases in tetrafluoroethane, and there is a lack of an effective recovery mechanism in terms of energy utilization, causing energy waste. In addition, the treatment of the heavy phase is not efficient enough. For example, the separation of solids and liquids in the heavy phase is not thorough, affecting subsequent treatment and product quality. During the degassing process, traditional degassing methods are less efficient and difficult to meet the requirements of large-scale production and high-quality products. These deficiencies limit the production quality and efficiency of tetrafluoroethane, increase production costs, and prompt the present invention to improve the tetrafluoroethane phase separation system. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides a phase separation system for tetrafluoroethane to solve the above problems.

[0006] (II) Technical Solutions

[0007] To achieve the above object, the present invention provides the following technical solution: A phase separation system for tetrafluoroethane:

[0008] It includes a main phase separator, the main phase separator is connected to a preheater, the preheater is connected to a cooler, the cooler is connected to a circulation pump, and the circulation pump is connected to a buffer tank; the main phase separator is connected to a light-phase storage tank, and a light-phase transfer pump I and a light-phase transfer pump II are connected to the light-phase storage tank; the main phase separator is connected to a heavy-phase storage tank, and the heavy-phase storage tank is connected to a heavy-phase transfer pump I and a heavy-phase transfer pump II;

[0009] The main phase separator is also connected to an on-line component analyzer, which can detect the component ratio of each phase of tetrafluoroethane in the phase separator in real time, so as to precisely control the phase separation process according to the detection results;

[0010] The main phase separator is also connected to a supercritical extraction device for deeply treating the tetrafluoroethane separated by the main phase separator to improve the product purity.

[0011] As a preferred technical solution of the present invention, the buffer tank is connected to a gas purification device. The gas purification device is provided with multiple layers of adsorption material layers, which can effectively remove the trace impurity gases mixed in the tetrafluoroethane. The gas purification device is connected to a three-stage condenser, the three-stage condenser is connected to a two-stage condenser, the two-stage condenser is connected to a one-stage condenser, and the one-stage condenser is connected to a degassing tower.

[0012] As a preferred technical solution of the present invention, a material inlet is provided on the degassing tower, and an ultrasonic vibration device is provided inside the degassing tower. The ultrasonic vibration device can promote the removal of gases in the tetrafluoroethane and improve the degassing efficiency.

[0013] As a preferred technical solution of the present invention, the degassing tower is connected to a heater, the heater is connected to a discharge pump I, and the heater is connected to an energy recovery device. The energy recovery device can recover the waste heat generated by the heater and use it to preheat the tetrafluoroethane raw material entering the phase separation system.

[0014] As a preferred technical solution of the present invention, the heater is connected to a discharge pump II, and the discharge pump II is connected to a flow automatic balancer. The flow automatic balancer can ensure the stability of the flow rate during the discharging process.

[0015] As a preferred technical solution of the present invention, the degassing tower is connected to a reflux pump I, the reflux pump I is connected to a circulation pump, and the reflux pump I is connected to an intelligent flow regulating valve. The intelligent flow regulating valve can automatically adjust the reflux flow rate according to the operating parameters of the system.

[0016] As a preferred technical solution of the present invention, the heavy phase storage tank is connected to a phase state adjuster. The phase state adjuster can convert some substances in the heavy phase into a phase state that is more conducive to subsequent treatment by changing conditions such as temperature and pressure. The phase state adjuster is connected to a solid-liquid separator. The solid-liquid separator adopts an innovative double-helix separation structure and can efficiently separate the solids and liquids in the heavy phase.

[0017] Compared with the prior art, the present invention provides a phase separation system for tetrafluoroethane, which has the following

[0018] Beneficial effects:

[0019] In terms of phase separation and product purity

[0020] Precisely control the phase separation process

[0021] By using an online component analyzer to detect the component ratios of each phase of tetrafluoroethane in the main phase separator in real time, the phase separation process can be precisely regulated according to the detection results. This helps to improve the accuracy and efficiency of phase separation, ensure the stable quality of the obtained light-phase and heavy-phase products, and enhance the controllability of the entire tetrafluoroethane production process.

[0022] Deep processing to improve product purity

[0023] The supercritical extraction device connected to the main phase separator can perform deep processing on the separated tetrafluoroethane. Supercritical extraction can selectively remove impurities in tetrafluoroethane, thereby improving product purity and meeting application scenarios with higher quality requirements, such as cleaning in the high-end electronics industry.

[0024] Impurity removal and product quality

[0025] Effectively remove trace impurity gases

[0026] The gas purification device connected to the buffer tank is equipped with multiple layers of adsorption material layers, which can effectively remove the trace impurity gases mixed in tetrafluoroethane. This helps to improve the purity of tetrafluoroethane products and reduce the adverse effects of impurity gases on tetrafluoroethane during use. For example, in a refrigeration system, it can prevent the interference of impurity gases on refrigeration performance.

[0027] Efficient degassing to improve product quality

[0028] The ultrasonic vibration device installed inside the degassing tower can promote the removal of gases in tetrafluoroethane and improve the degassing efficiency. An efficient degassing process can further reduce the gas content in tetrafluoroethane, improve the stability and quality of the product, and make it more reliable during storage and use.

[0029] Energy utilization and cost savings

[0030] Energy recovery to reduce energy consumption

[0031] The connection between the heater and the energy recovery device allows the energy recovery device to recover the waste heat generated by the heater and use it to preheat the tetrafluoroethane raw material entering the phase separation system. This energy recovery mechanism can effectively reduce the energy consumption of the system, save energy costs, and improve the energy utilization efficiency of the entire production process.

[0032] Flow stability to ensure production continuity

[0033] The flow automatic balancer connected to the discharge pump II can ensure the stability of the flow during the discharge process. Stable flow helps to maintain the continuity and stability of the entire production process, reduce problems such as unstable product quality and equipment wear caused by flow fluctuations, and is also beneficial for the connection with subsequent production processes.

[0034] Heavy-phase treatment

[0035] Optimized heavy phase treatment

[0036] The phase state adjuster connected to the heavy phase storage tank can convert some substances in the heavy phase into a phase state that is more conducive to subsequent treatment by changing conditions such as temperature and pressure, facilitating subsequent separation and treatment operations. This helps improve the efficiency and effectiveness of heavy phase treatment, reducing resource waste and costs during the heavy phase treatment process.

[0037] Efficient solid-liquid separation

[0038] The solid-liquid separator connected to the phase state adjuster adopts an innovative double helix separation structure, which can efficiently separate solids and liquids in the heavy phase. Efficient solid-liquid separation can improve the quality of heavy phase treatment, reduce the impact of solid impurities on subsequent products or treatment processes, and at the same time improve the recovery and utilization rates of solid and liquid resources.

[0039] The tetrafluoroethane phase separation system of the present invention has significant beneficial effects in aspects such as precise regulation of the phase separation process, improvement of product purity, removal of impurities, energy recovery and utilization, and heavy phase treatment through multiple innovative components and connection methods. These beneficial effects combined can improve the production quality and efficiency of tetrafluoroethane, reduce production costs, improve energy utilization efficiency, and contribute to the performance improvement and stable use of tetrafluoroethane in various application fields. Brief description of the drawings

[0040] Figure 1 It is a schematic structural diagram of the present invention.

[0041] Wherein: main phase separator 1; preheater 2; cooler 3; circulation pump 4; buffer tank 5; light phase storage tank 6; light phase transfer pump I 7; light phase transfer pump II 8; heavy phase storage tank 9; heavy phase transfer pump I 10; heavy phase transfer pump II 11; on-line component analyzer 12; gas purification device 13; three-stage condenser 14; two-stage condenser 15; first-stage condenser 16; degassing tower 17; ultrasonic vibration device 18; heater 19; discharge pump I 20; energy recovery device 21; discharge pump II 22; flow automatic balancer 23; reflux pump I 24; intelligent flow regulating valve 25; phase state adjuster 26; solid-liquid separator 27; supercritical extraction device 28. Detailed implementation manners

[0042] The present invention will be further described in detail below with reference to the drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the invention, rather than all of the embodiments. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the invention without creative efforts shall fall within the scope of protection of the invention.

[0043] It should be noted that if the invention embodiments involve directional indications (such as up, down, left, right, front, back...), then such directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture (as shown in the attached drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0044] In addition, "a plurality of" means two or more. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the invention.

[0045] Please refer to Figure 1 , a specific implementation manner of a tetrafluoroethane phase separation system:

[0046] I. Overall system layout and connection

[0047] Connection of the phase separation core components

[0048] First, construct a tetrafluoroethane phase separation system and set the main phase separator 1 as the core separation component. Connect the main phase separator 1 to the preheater 2 so that the tetrafluoroethane coming out of the main phase separator 1 can enter the preheater 2 for preheating operation. The preheated tetrafluoroethane then flows into the cooler 3, and the cooler 3 cools it. The cooled tetrafluoroethane is transported to the buffer tank 5 by the circulation pump 4.

[0049] The main phase separator 1 is also connected to the light-phase storage tank 6. The light-phase transfer pump I 7 and the light-phase transfer pump II 8 are installed on the light-phase storage tank 6 for the transfer operation of the light phase. The main phase separator 1 is also connected to the heavy-phase storage tank 9, and the heavy-phase storage tank 9 is connected to the heavy-phase transfer pump I 10 and the heavy-phase transfer pump II 11 for the transfer of the heavy phase.

[0050] Connect the main phase separator 1 to the on-line component analyzer 12, and the on-line component analyzer 12 can detect the component ratio of each phase of tetrafluoroethane in the main phase separator 1 in real time. For example, collect the physical and chemical characteristic signals of each phase of tetrafluoroethane through sensors, and then use the built-in analysis algorithm to obtain the component ratio data. According to these detection results, parameters such as temperature, pressure, and flow rate in the phase separation process can be accurately regulated through a control system such as PLC combined with relevant control programs.

[0051] Connect the main phase separator 1 to the supercritical extraction device 28. When it is necessary to perform in-depth treatment on the tetrafluoroethane separated by the main phase separator 1 to improve the product purity, start the supercritical extraction device 28. The supercritical extraction device 28 sets appropriate supercritical conditions such as temperature and pressure according to the characteristics of tetrafluoroethane, and performs extraction operation on tetrafluoroethane.

[0052] Subsequent connection components of the buffer tank

[0053] The buffer tank 5 is connected to the gas purification device 13. Inside the gas purification device 13, multiple layers of adsorption material layers are provided, such as activated carbon layer, molecular sieve layer, etc. When tetrafluoroethane enters the gas purification device 13, these adsorption material layers can effectively remove trace impurity gases mixed in the tetrafluoroethane. The purified tetrafluoroethane flows out of the gas purification device 13 and then enters the tertiary condenser 14, where it is preliminarily condensed, and then flows successively into the secondary condenser 15 and the primary condenser 16 for further condensation treatment, and finally enters the degassing tower 17.

[0054] II. Related operations of the degassing tower

[0055] Internal structure and operation of the degassing tower

[0056] The degassing tower 17 is provided with a material inlet, and tetrafluoroethane enters the degassing tower 17 from the primary condenser 16 through the material inlet. The ultrasonic vibration device 18 inside the degassing tower 17 starts to work. By generating high-frequency vibrations, the ultrasonic vibration device 18 makes the gas molecules in the tetrafluoroethane more likely to escape from the liquid, thereby promoting the removal of gas in the tetrafluoroethane and improving the degassing efficiency.

[0057] Connection and operation between the degassing tower and other components

[0058] The degassing tower 17 is connected to the heater 19, and the degassed tetrafluoroethane enters the heater 19. The heater 19 heats the tetrafluoroethane according to the set temperature parameters, and a part of the heated tetrafluoroethane is transported by the discharge pump I 20 for subsequent treatment.

[0059] The heater 19 is connected to the energy recovery device 21, and the energy recovery device 21 recovers the waste heat generated by the heater 19. For example, through the principle of a heat exchanger, the waste heat is transferred to the tetrafluoroethane raw material entering the phase separation system to achieve the reuse of energy and the purpose of preheating the raw material.

[0060] The heater 19 is also connected to the discharge pump II 22, and the discharge pump II 22 transports the heated tetrafluoroethane to the flow automatic balancer 23. The flow automatic balancer 23 ensures the stability of the flow rate during the discharge process through an internal flow regulation mechanism, such as the cooperation of a regulating valve and a flow sensor.

[0061] The degassing tower 17 is connected to the reflux pump I 24. The reflux pump I 24 returns a part of tetrafluoroethane to the circulation pump 4. The reflux pump I 24 is connected to the intelligent flow regulating valve 25. The intelligent flow regulating valve 25 automatically adjusts the reflux flow according to the operating parameters of the system such as temperature, pressure, flow rate, etc. For example, when the system detects that the concentration of tetrafluoroethane in a certain area is too high or too low, the intelligent flow regulating valve 25 adjusts the reflux flow according to a preset algorithm to maintain the stable operation of the system.

[0062] III. Related operations for heavy phase treatment

[0063] Phase state adjustment and solid-liquid separation

[0064] The heavy phase storage tank 9 is connected to the phase state adjuster 26. The phase state adjuster 26 changes the phase state of some substances in the heavy phase into a phase state that is more suitable for subsequent treatment by changing conditions such as temperature and pressure according to the composition of the heavy phase and the requirements of subsequent treatment. For example, for some impurities that will undergo phase state changes at specific temperatures and pressures, the temperature and pressure of the phase state adjuster 26 can be set to appropriate values to convert the impurities into a phase state that is easy to separate.

[0065] The phase state adjuster 26 is connected to the solid-liquid separator 27. The solid-liquid separator 27 adopts an innovative double helix separation structure. When the heavy phase after phase state adjustment enters the solid-liquid separator 27, the double helix structure efficiently separates the solid and liquid in the heavy phase through the centrifugal force generated by rotation and the physical property differences of substances in different phase states. For example, solid particles are thrown towards the wall of the separator under the action of centrifugal force and then discharged through a specific outlet, while the liquid flows out from another outlet, thus realizing the effective separation of solid and liquid.

[0066] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

[0067] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0068] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A phase separation system for tetrafluoroethane, characterized in that: The invention comprises a main phase separator (1), wherein the main phase separator (1) is connected to a preheater (2), the preheater (2) is connected to a cooler (3), the cooler (3) is connected to a circulation pump (4), and the circulation pump (4) is connected to a buffer tank (5); the main phase separator (1) is connected to a light phase storage tank (6), and the light phase storage tank (6) is connected to a light phase delivery pump I (7) and a light phase delivery pump II (8); the main phase separator (1) is connected to a heavy phase storage tank (9), and the heavy phase storage tank (9) is connected to a heavy phase delivery pump I (10) and a heavy phase delivery pump II (11); The main phase separator (1) is also connected to an online component analyzer (12), and the online component analyzer (12) is capable of detecting the component ratios of each phase of tetrafluoroethane in the phase separator (1) in real time, so as to accurately control the phase separation process according to the detection results; The main phase separator (1) is also connected to a supercritical extraction device (28) for performing deep processing on the tetrafluoroethane separated by the main phase separator (1) to improve the purity of the product.

2. A tetrafluoroethane phase separation system according to claim 1, characterized in that: The buffer tank (5) is connected to a gas purification device (13). The gas purification device (13) is provided with multiple layers of adsorption material, which can effectively remove trace impurity gases mixed in tetrafluoroethane. The gas purification device (13) is connected to a three-stage condenser (14), the three-stage condenser (14) is connected to a two-stage condenser (15), the two-stage condenser (15) is connected to a first-stage condenser (16), and the first-stage condenser (16) is connected to a degassing tower (17).

3. A tetrafluoroethane phase separation system according to claim 2, characterized in that: The degassing tower (17) is provided with a material inlet, and an ultrasonic vibration device (18) is provided inside the degassing tower (17). The ultrasonic vibration device (18) can promote the removal of gas in tetrafluoroethane and improve the degassing efficiency.

4. A tetrafluoroethane phase separation system according to claim 2, characterized in that: The degassing tower (17) is connected to a heater (19), the heater (19) is connected to a discharge pump I (20), and the heater (19) is connected to an energy recovery device (21), which can recover the waste heat generated by the heater (19) and use it to preheat the tetrafluoroethane raw material entering the phase separation system.

5. A tetrafluoroethane phase separation system according to claim 4, characterized in that: The heater (19) is connected to a discharge pump II (22), and the discharge pump II (22) is connected to an automatic flow balancer (23). The automatic flow balancer (23) can ensure the stability of the flow during the discharge process.

6. A tetrafluoroethane phase separation system according to claim 2, characterized in that: The degassing tower (17) is connected to a reflux pump I (24), which is connected to a circulation pump (4), and the reflux pump I (24) is connected to an intelligent flow regulating valve (25). The intelligent flow regulating valve (25) can automatically adjust the reflux flow according to the operating parameters of the system.

7. A tetrafluoroethane phase separation system according to claim 1, characterized in that: The heavy phase storage tank (9) is connected to a phase regulator (26), which can convert part of the substances in the heavy phase into a phase that is easier to subsequently process by changing conditions such as temperature and pressure. The phase regulator (26) is connected to a solid-liquid separator (27), which adopts an innovative double-helix separation structure and can efficiently separate solids and liquids in the heavy phase.

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