A heat pump driven pervaporation membrane separation device

Abstract

The utility model discloses a kind of heat pump drive permeation evaporation membrane separation device, including equipment rack, the bottom of the equipment rack is equipped with moving assembly, the top of the equipment rack is respectively installed with heat pump assembly, membrane separation assembly, feed assembly, condensation collection assembly, vacuum component and control box;The heat pump assembly includes compressor, condenser, throttle valve and evaporator, the utility model relates to membrane separation technical field.The heat pump drive permeation evaporation membrane separation device, energy efficient utilization is realized by heat pump assembly, raw materials are preheated using the waste heat of condenser, reduce the consumption of external energy, reduce production cost, for example, in the case of same processing capacity, compared with traditional device, energy consumption can be reduced by 30%-40%, through the cooperation of temperature sensor, flow regulating valve and control box, the automation control of device is realized, improve the efficiency and product quality of membrane separation.

Description

Technical Field

[0001] This utility model relates to the field of membrane separation technology, specifically a heat pump driven pervaporation membrane separation device. Background Technology

[0002] The reference patent title is: Heat Pump Pervaporation Membrane Separation Device (Authorization Announcement No.: CN207980883U, Authorization Announcement Date: 2018.10.19), which includes a heater, a pervaporation membrane module, a cooler, a compressor, and a throttling valve; the heat pump working fluid channels of the compressor, the heater, the throttling valve, and the cooler are sequentially connected by pipelines to form a heat pump circulation loop, and the circulation loop is filled with heat pump working fluid; the feed liquid channel of the heater is connected to the feed liquid side of the pervaporation membrane module by pipelines; the pervaporation vapor side of the pervaporation membrane module is connected to the pervaporation vapor channel of the cooler by pipelines. The beneficial effect of this device is to reduce the energy consumption of the pervaporation membrane separation process.

[0003] Based on the above-mentioned documents, there are many problems to be solved in the existing pervaporation membrane separation technology. On the one hand, traditional membrane separation devices have high energy consumption, which undoubtedly increases production costs and limits their large-scale application in the current context of increasingly tight energy resources. For example, many traditional devices rely on external heating sources to preheat raw materials, resulting in low energy utilization and difficulty in accurately controlling the heating process, which affects the efficiency and effect of membrane separation. On the other hand, the stability and mobility of the devices are insufficient. Some large devices are bulky and complex in structure, making them difficult to move after installation. If it is necessary to change the site of use, the disassembly and reinstallation process is cumbersome and can easily damage the device. Therefore, this utility model provides a heat pump driven pervaporation membrane separation device. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a heat pump-driven pervaporation membrane separation device, which solves the problems of high energy consumption and inconvenience in mobility in existing technologies.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a heat pump driven pervaporation membrane separation device, including an equipment frame, a movable component at the bottom of the equipment frame, and a heat pump component, a membrane separation component, a feeding component, a condensation collection component, a vacuum component, and a control box respectively installed on the top of the equipment frame;

[0006] The heat pump assembly includes a compressor, a condenser, a throttle valve, and an evaporator. The compressor, condenser, throttle valve, and evaporator are connected by pipelines to form a closed loop. The frequency converter of the compressor is electrically connected to the control box.

[0007] The membrane separation assembly includes a membrane module, which contains a pervaporation membrane, dividing the interior of the membrane module into a feed side and a permeate side. The feed side outlet of the membrane module is connected to a permeate storage tank via a pipeline.

[0008] The feeding assembly includes a raw material storage tank, a feed pump, and a raw material preheater. The raw material storage tank is connected to the inlet of the raw material preheater via a pipeline and the feed pump. The outlet of the raw material preheater is connected to the raw material side inlet of the membrane module. The heat source inlet of the raw material preheater is connected to the heat release side of the condenser.

[0009] The condensation collection assembly includes a permeate-side condenser and a permeate storage tank. The inlet of the permeate-side condenser is connected to the permeate-side outlet of the membrane module, the outlet of the permeate-side condenser is connected to the permeate storage tank, and the cold source inlet of the permeate-side condenser is connected to the heat absorption side of the evaporator.

[0010] Preferably, the vacuum assembly includes a vacuum pump and a vacuum buffer tank. One side of the vacuum buffer tank is connected to the permeate side of the membrane assembly via a pipeline, and the vacuum buffer tank is connected to the vacuum pump via a pipeline.

[0011] Preferably, a first temperature sensor is provided on the pipeline between the raw material preheater and the membrane module, and a second temperature sensor is provided on the pipeline between the membrane module and the permeate storage tank. The first temperature sensor and the second temperature sensor are electrically connected to the control box, respectively.

[0012] Preferably, a first flow regulating valve is provided on the pipeline between the condenser and the raw material preheater, and a second flow regulating valve is provided on the pipeline between the evaporator and the permeate-side condenser.

[0013] Preferably, the pervaporation membrane is a composite membrane or a hybrid membrane.

[0014] Preferably, the moving assembly includes a moving motor mounted on one side of the equipment frame. One end of the output shaft of the moving motor is fixedly connected to a double-acting lead screw via a coupling. A symmetrical moving plate is threaded onto the surface of the double-acting lead screw. A moving rod is rotatably connected to the bottom of the moving plate. A lifting plate is rotatably connected to one end of the moving rod. A caster wheel is installed at the bottom of the lifting plate. A lifting rod is fixedly connected to the top of the lifting plate. The surface of the lifting rod is slidably connected to the interior of the equipment frame. A support rod is slidably connected to the interior of the moving plate and is mounted on the inner wall of the equipment frame.

[0015] Beneficial effects

[0016] This invention provides a heat pump-driven pervaporation membrane separation device. Compared with the prior art, it has the following advantages:

[0017] 1. This heat pump-driven pervaporation membrane separation device achieves efficient energy utilization through the heat pump components. It utilizes the waste heat of the condenser to preheat the raw materials, reducing the consumption of external energy and lowering production costs. For example, under the same processing capacity, energy consumption can be reduced by 30%-40% compared to traditional devices. Through the cooperation of temperature sensors, flow regulating valves, and control boxes, the device achieves automated control, improving the efficiency of membrane separation and product quality.

[0018] 2. This heat pump-driven pervaporation membrane separation device is equipped with a moving component. Driven by a moving motor, the lifting and lowering of the casters can be flexibly adjusted. When the device needs to be moved, multiple sets of casters support the device and move the entire device through the casters. When it reaches the designated location, the moving motor can be driven in a direction to move the multiple sets of casters upward synchronously, allowing the support legs at the bottom of the device to support the device again. This gives the device excellent mobility. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the external structure of this utility model from the left side.

[0020] Figure 2 This is a three-dimensional schematic diagram of the external structure of this utility model from the right side view.

[0021] Figure 3 This is a three-dimensional structural diagram of the heat pump assembly, membrane separation assembly, feeding assembly, condensation collection assembly, and vacuum assembly of this utility model;

[0022] Figure 4 This is a three-dimensional schematic diagram of the bottom structure of the equipment frame of this utility model;

[0023] Figure 5 This utility model Figure 4 Enlarged diagram of point A in the middle.

[0024] In the diagram: 1-Equipment rack, 2-Moving component, 21-Moving motor, 22-Double-actuated screw, 23-Moving plate, 24-Moving rod, 25-Lifting plate, 26-Universal wheel, 27-Lifting rod, 3-Heat pump assembly, 31-Compressor, 32-Condenser, 33-Throttle valve, 34-Evaporator, 4-Membrane separation assembly, 41-Membrane assembly, 42-Pervaporation membrane, 43-Permeate storage tank, 5-Feed assembly, 51-Raw material storage tank, 52-Feed pump, 53-Raw material preheater, 6-Condensation collection assembly, 61-Permeate-side condenser, 62-Permeate storage tank, 7-Vacuum assembly, 71-Vacuum pump, 72-Vacuum buffer tank, 8-Control box, 9-First temperature sensor, 10-Second temperature sensor, 11-First flow regulating valve, 12-Second flow regulating valve. Detailed Implementation

[0025] 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.

[0026] Please see Figure 1-5 This utility model provides a technical solution:

[0027] A heat pump driven pervaporation membrane separation device includes an equipment frame 1, a movable component 2 at the bottom of the equipment frame 1, and a heat pump component 3, a membrane separation component 4, a feeding component 5, a condensation collection component 6, a vacuum component 7, and a control box 8 respectively installed on the top of the equipment frame 1.

[0028] The heat pump assembly 3 includes a compressor 31, a condenser 32, a throttle valve 33, and an evaporator 34. The compressor 31, condenser 32, throttle valve 33, and evaporator 34 are connected by pipelines to form a closed loop. The frequency converter of the compressor 31 is electrically connected to the control box 8.

[0029] The compressor 31, condenser 32, expansion valve 33 and evaporator 34 are connected by a pipeline forming a circulation pipeline filled with environmentally friendly refrigerant;

[0030] The membrane separation unit 4 includes a membrane module 41, which is equipped with a pervaporation membrane 42. The membrane module 41 is divided into a feed side and a permeate side. The feed side outlet of the membrane module 41 is connected to a permeate storage tank 43 through a pipeline.

[0031] The pervaporation membrane 42 is a composite membrane or a mixed matrix membrane, which has good separation performance and can effectively improve the efficiency and selectivity of membrane separation.

[0032] The feeding assembly 5 includes a raw material storage tank 51, a feed pump 52, and a raw material preheater 53. The raw material storage tank 51 is connected to the inlet of the raw material preheater 53 via a pipeline through the feed pump 52. The outlet of the raw material preheater 53 is connected to the raw material side inlet of the membrane module 41. The heat source inlet of the raw material preheater 53 is connected to the heat release side of the condenser 32.

[0033] The heat released by the condenser 32 in the heat pump assembly 3 is used to preheat the raw materials, realizing energy recovery and utilization and reducing energy consumption; the feed pump 52 is electrically connected to the control box 8.

[0034] The condensation collection assembly 6 includes a permeate-side condenser 61 and a permeate storage tank 62. The inlet of the permeate-side condenser 61 is connected to the permeate-side outlet of the membrane assembly 41, the outlet of the permeate-side condenser 61 is connected to the permeate storage tank 62, and the cold source inlet of the permeate-side condenser 61 is connected to the heat absorption side of the evaporator 34.

[0035] The cooling capacity is provided by evaporator 34, and the permeate vapor is condensed and collected, which improves the product recovery rate.

[0036] The control box 8 is electrically connected to the frequency converter of the compressor 31, which can precisely control the operating frequency of the compressor 31 according to the actual operating conditions, thereby adjusting the cooling or heating effect of the heat pump component and realizing the efficient use of energy.

[0037] The top of the equipment rack 1 is equipped with a multi-component bracket, on which the compressor 31, condenser 32, evaporator 34, membrane module 41, feed preheater 53 and permeate side condenser 61 are all installed.

[0038] The heat pump component 3 achieves efficient energy utilization. The waste heat of the condenser 32 is used to preheat the raw materials, reducing the consumption of external energy and lowering production costs. For example, under the same processing capacity, energy consumption can be reduced by 30%-40% compared with traditional equipment. Through the cooperation of temperature sensor, flow regulating valve and control box 8, the automatic control of the equipment is realized, which improves the efficiency of membrane separation and product quality.

[0039] In this embodiment, the vacuum assembly 7 includes a vacuum pump 71 and a vacuum buffer tank 72. One side of the vacuum buffer tank 72 is connected to the permeate side of the membrane assembly 41 through a pipeline, and the vacuum buffer tank 72 is connected to the vacuum pump 71 through a pipeline.

[0040] Vacuum pump 71 is electrically connected to control box 8;

[0041] In this embodiment, a first temperature sensor 9 is provided on the pipeline between the raw material preheater 53 and the membrane module 41, and a second temperature sensor 10 is provided on the pipeline between the membrane module 41 and the permeate storage tank 43. The first temperature sensor 9 and the second temperature sensor 10 are electrically connected to the control box 8 respectively.

[0042] The first temperature sensor 9 and the second temperature sensor 10 can monitor the temperature of the raw material before it enters the membrane module 41 and when it leaves the membrane module 41 in real time, and transmit the temperature signal to the control box 8. The control box 8 adjusts the heat pump component 3 and other components according to the temperature signal to ensure that the device operates under the optimal temperature conditions.

[0043] In this embodiment, a first flow regulating valve 11 is provided on the pipeline between the condenser 32 and the raw material preheater 53, and a second flow regulating valve 12 is provided on the pipeline between the evaporator 34 and the permeate side condenser 61.

[0044] The flow rate of refrigerant in the pipeline can be precisely adjusted by the first flow regulating valve 11 and the second flow regulating valve 12, thereby further optimizing the operating performance of the device.

[0045] In this embodiment, the pervaporation membrane 42 is a composite membrane or a hybrid membrane.

[0046] In this embodiment, the moving component 2 includes a moving motor 21 installed on one side of the equipment rack 1. One end of the output shaft of the moving motor 21 is fixedly connected to a bidirectional lead screw 22 via a coupling. A symmetrical moving plate 23 is threadedly connected to the surface of the bidirectional lead screw 22. A moving rod 24 is rotatably connected to the bottom of the moving plate 23. A lifting plate 25 is rotatably connected to one end of the moving rod 24. A caster wheel 26 is installed at the bottom of the lifting plate 25. A lifting rod 27 is fixedly connected to the top of the lifting plate 25. The surface of the lifting rod 27 is slidably connected to the interior of the equipment rack 1. A support rod is slidably connected to the interior of the moving plate 23. The support rod is installed on the inner wall of the equipment rack 1.

[0047] The mobile motor 21 is a three-phase asynchronous motor; the bidirectional lead screw 22 rotates inside the equipment frame 1.

[0048] By incorporating a movable component 2 and driving a movable motor 21, the lifting and lowering of the casters 26 can be flexibly adjusted. When the device needs to be moved, multiple casters 26 support the device and move the entire device via the casters 26. Once the device reaches the designated location, the movable motor 21 can be driven in a direction to move the multiple casters 26 upwards synchronously, allowing the support legs at the bottom of the device to support it again. This gives the device excellent mobility.

[0049] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0050] Heat pump component energy cycle: Compressor 31 compresses low-temperature, low-pressure refrigerant vapor into high-temperature, high-pressure vapor, which is then sent to condenser 32. In condenser 32, the high-temperature, high-pressure refrigerant exchanges heat with the low-temperature raw material from raw material preheater 53. The refrigerant releases heat and condenses into a high-pressure liquid, while the raw material absorbs heat and is preheated. Subsequently, the high-pressure refrigerant liquid is throttled and depressurized by throttling valve 33, becoming a low-temperature, low-pressure gas-liquid mixture that enters evaporator 34. In evaporator 34, the low-temperature, low-pressure refrigerant absorbs heat from permeate-side condenser 61 and evaporates into low-temperature, low-pressure vapor, which is then drawn into compressor 31 for compression, completing the heat pump cycle. Control box 8 is electrically connected to the frequency converter controller of compressor 31. Based on the temperature signals from first temperature sensor 9 and second temperature sensor 10, the operating frequency of compressor 31 is precisely adjusted, thereby controlling the heating and cooling capacity of the heat pump component and ensuring that the entire energy cycle proceeds as needed.

[0051] Feeding and preheating process: The raw liquid in the raw material storage tank 51 is transported to the raw material preheater 53 through the pipeline under the action of the feed pump 52. The heat source inlet of the raw material preheater 53 is connected to the heat release side of the condenser 32. The heat released by the condenser 32 is used to preheat the raw liquid. The temperature of the preheated raw liquid is higher, which is more conducive to the subsequent permeate evaporation separation process in the membrane module 41. The first temperature sensor 9 is installed on the pipeline between the raw material preheater 53 and the membrane module 41 to monitor the temperature of the raw liquid entering the membrane module 41 in real time and transmit the signal to the control box 8 so that the control box 8 can regulate the heat pump component to ensure that the temperature of the raw liquid entering the membrane module 41 is within a suitable range.

[0052] Membrane separation process: The preheated feed liquid enters the feed side of the membrane module 41. The pervaporation membrane 42 inside the membrane module 41 divides its interior into the feed side and the permeate side. Driven by the chemical potential difference between the components on both sides of the membrane, some easily permeable components in the feed liquid (such as small molecules or substances with specific affinities) are preferentially adsorbed on the feed side surface of the pervaporation membrane 42, and then diffuse through the membrane pores to reach the permeate side surface and vaporize into permeate vapor. The pervaporation membrane 42 is a composite membrane or a mixed matrix membrane, which has good selectivity and permeability and can efficiently separate different components. The remaining liquid that does not permeate through the pervaporation membrane 42 (permeate) is collected from the feed side outlet of the membrane module 41 through the pipeline into the permeate storage tank 43. The second temperature sensor 10 is installed on the feed side outlet pipeline of the membrane module 41 to monitor the temperature of the permeate and provide a reference for the control box 8 to adjust the heat pump component.

[0053] Permeate vapor condensation and collection: Permeate vapor generated on the permeate side of membrane module 41 enters the permeate side condenser 61 through a pipeline. The cold source inlet of the permeate side condenser 61 is connected to the heat absorption side of evaporator 34. The cooling capacity provided by evaporator 34 causes the permeate vapor to release heat and condense in the permeate side condenser 61, turning it into liquid permeate. The condensed permeate enters the permeate storage tank 62 through a pipeline for collection. A second flow regulating valve 12 is provided on the pipeline between evaporator 34 and permeate side condenser 61. By adjusting its opening, the cooling capacity entering the permeate side condenser 61 can be controlled, thereby optimizing the condensation effect of permeate vapor.

[0054] Vacuum maintenance: The vacuum pump 71 in the vacuum assembly 7 is connected to the permeate side of the membrane assembly 41 through the vacuum buffer tank 72. When the vacuum pump 71 is working, it extracts the gas from the permeate side of the membrane assembly 41 to maintain a certain vacuum level on the permeate side. The lower vacuum level reduces the partial pressure of the components on the permeate side, increases the chemical potential difference across the membrane, promotes the diffusion and vaporization of easily permeable components in the feed liquid to the permeate side, and improves the efficiency of membrane separation. The vacuum buffer tank 72 can stabilize the vacuum level on the permeate side of the membrane assembly 41 and reduce the impact of pressure fluctuations generated by the vacuum pump 71 during operation on the separation process.

[0055] Flow regulation: A first flow regulating valve 11 is installed on the pipeline between the condenser 32 and the raw material preheater 53. By adjusting its opening, the heat entering the raw material preheater 53 can be controlled, thereby precisely controlling the preheating temperature of the raw material liquid. The first flow regulating valve 11 and the second flow regulating valve 12 work together to make the energy distribution of the entire device more reasonable, further improving the operating efficiency and separation effect of the device.

[0056] Mobility Function Implementation: When the device needs to be moved, the moving motor 21 in the moving assembly 2 is activated. The output shaft of the moving motor 21 drives the bidirectional lead screw 22 to rotate via a coupling. Since the moving plate 23 is threadedly connected to the bidirectional lead screw 22, and the moving plate 23 can only move in a straight line under the restriction of the support rod, the rotation of the bidirectional lead screw 22 will cause the symmetrical moving plates 23 to move closer or further apart. The movement of the moving plate 23 will drive the moving rod 24, which is rotatably connected to it, to move. The moving rod 24 pushes the lifting plate 25 to move up and down. When the moving plates 23 move further apart, the moving rod 24 pushes the lifting plate 25 down, so that the casters 26 contact the ground and support the device. At this time, the device can be moved easily. After reaching the designated position, the moving motor 21 is activated in reverse to bring the moving plates 23 closer together. The moving rod 24 pulls the lifting plate 25 up, and the casters 26 retract, so that the support legs of the device are stably placed on the ground. The lifting rod 27 ensures the stability of the lifting plate 25 moving up and down.

[0057] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0058] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat pump driven pervaporation membrane separation device, comprising a frame (1), characterized in that: The bottom of the equipment rack (1) is provided with a moving component (2), and the top of the equipment rack (1) is respectively equipped with a heat pump component (3), a membrane separation component (4), a feeding component (5), a condensation collection component (6), a vacuum component (7) and a control box (8); The heat pump assembly (3) includes a compressor (31), a condenser (32), a throttle valve (33), and an evaporator (34). The compressor (31), condenser (32), throttle valve (33), and evaporator (34) are connected by pipelines to form a closed loop. The frequency converter of the compressor (31) is electrically connected to the control box (8). The membrane separation assembly (4) includes a membrane assembly (41), which is provided with a pervaporation membrane (42) to divide the interior of the membrane assembly (41) into a feed side and a permeate side. The feed side outlet of the membrane assembly (41) is connected to a permeate storage tank (43) through a pipeline. The feeding assembly (5) includes a raw material storage tank (51), a feed pump (52), and a raw material preheater (53). The raw material storage tank (51) is connected to the inlet of the raw material preheater (53) via a pipeline through the feed pump (52). The outlet of the raw material preheater (53) is connected to the raw material side inlet of the membrane module (41). The heat source inlet of the raw material preheater (53) is connected to the heat release side of the condenser (32). The condensation collection assembly (6) includes a permeate-side condenser (61) and a permeate storage tank (62). The inlet of the permeate-side condenser (61) is connected to the permeate-side outlet of the membrane assembly (41), the outlet of the permeate-side condenser (61) is connected to the permeate storage tank (62), and the cold source inlet of the permeate-side condenser (61) is connected to the heat absorption side of the evaporator (34).

2. The heat pump driven pervaporation membrane separation device according to claim 1, characterized in that: The vacuum assembly (7) includes a vacuum pump (71) and a vacuum buffer tank (72). One side of the vacuum buffer tank (72) is connected to the permeate side of the membrane assembly (41) through a pipeline, and the vacuum buffer tank (72) is connected to the vacuum pump (71) through a pipeline.

3. The heat pump driven pervaporation membrane separation device according to claim 1, characterized in that: A first temperature sensor (9) is provided on the pipeline between the raw material preheater (53) and the membrane module (41), and a second temperature sensor (10) is provided on the raw material side outlet pipeline of the membrane module (41). The first temperature sensor (9) and the second temperature sensor (10) are electrically connected to the control box (8) respectively.

4. The heat pump driven pervaporation membrane separation device according to claim 1, characterized in that: A first flow regulating valve (11) is provided on the pipeline between the condenser (32) and the raw material preheater (53), and a second flow regulating valve (12) is provided on the pipeline between the evaporator (34) and the permeate side condenser (61).

5. The heat pump driven pervaporation membrane separation device according to claim 1, characterized in that: The pervaporation membrane (42) is a composite membrane or a hybrid membrane.

6. The heat pump driven pervaporation membrane separation device according to claim 1, characterized in that: The moving assembly (2) includes a moving motor (21) installed on one side of the equipment frame (1). One end of the output shaft of the moving motor (21) is fixedly connected to a double-acting screw (22) via a coupling. A symmetrical moving plate (23) is threaded onto the surface of the double-acting screw (22). A moving rod (24) is rotatably connected to the bottom of the moving plate (23). A lifting plate (25) is rotatably connected to one end of the moving rod (24). A caster wheel (26) is installed at the bottom of the lifting plate (25). A lifting rod (27) is fixedly connected to the top of the lifting plate (25). The surface of the lifting rod (27) is slidably connected to the interior of the equipment frame (1). A support rod is slidably connected to the interior of the moving plate (23). The support rod is installed on the inner wall of the equipment frame (1).

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