A flexible packed bed ultragravity evaporator

Abstract

This application relates to a flexible packed bed ultragravity evaporator, including an evaporation tower and an isolation air plate disposed within the evaporation tower. The isolation air plate divides the space inside the evaporation tower into an evaporation space and an air inlet space. It also includes a hollow water separator disposed within the evaporation tower and rotatably connected to the evaporation tower, a water inlet pipe with its first end connected to a water source and its second end extending into the first end of the hollow water separator, flexible packing material filled within the evaporation space, and an ultraviolet cleaning lamp disposed on the inner wall of the evaporation tower. The first end of the hollow water separator communicates with the space outside the evaporation tower, the air inlet communicates with the air inlet space, and the exhaust port communicates with the evaporation space. The flexible packed bed ultragravity evaporator disclosed in this application uses a direct gas-liquid contact method to reduce the complexity of the equipment structure. It uses flexible packing material as the intermediate medium for gas-liquid contact, increasing the contact area while avoiding corrosion problems. Simultaneously, it can remove salt crystals from the surface of the flexible packing material, solving the clogging problem.

Description

Technical Field

[0001] This application relates to the field of evaporation technology, and in particular to a flexible packed bed ultragravity evaporator. Background Technology

[0002] In the field of wastewater treatment, the treatment of high-salinity wastewater is a significant issue. Traditional methods for treating high-salinity wastewater mainly employ evaporation technologies, including MVR (Mechanical Vapor Recompression) and multi-effect evaporation systems. While MVR technology can improve energy efficiency, its complexity and high investment cost limit its widespread practical application. Multi-effect evaporation systems, through multi-stage evaporation and recompression, can achieve high concentrations of wastewater, but their complex equipment is prone to clogging and corrosion.

[0003] In addition, the amount of investment is also a limiting factor, especially for small and medium-sized enterprises, where purchasing and maintaining expensive equipment is a huge burden; clogging and corrosion problems also limit the operating efficiency and lifespan of traditional evaporators, requiring higher maintenance costs and downtime for maintenance. Summary of the Invention

[0004] This application provides a flexible packed bed ultragravity evaporator, which uses a direct gas-liquid contact method to reduce the complexity of the equipment structure. Flexible packing is used as the intermediate medium for gas-liquid contact, which increases the contact area while avoiding corrosion problems. At the same time, it can also remove salt crystals on the surface of the flexible packing and solve the clogging problem.

[0005] The above-mentioned objective of this application is achieved through the following technical solution:

[0006] This application provides a flexible packed bed ultragravity evaporator, comprising:

[0007] An evaporation tower has an air inlet and an exhaust outlet;

[0008] An isolation air plate is installed inside the evaporation tower. The isolation air plate divides the space inside the evaporation tower into an evaporation space and an air intake space. The evaporation space is located above the air intake space.

[0009] A hollow water distributor is installed inside the evaporation tower and is rotatably connected to the evaporation tower. The first end of the hollow water distributor is connected to the space outside the evaporation tower, and the hollow water distributor is also connected to the evaporation space.

[0010] The inlet pipe has one end for connecting to the water source and the other end for extending into the first end of the hollow water distributor.

[0011] Flexible packing material is used to fill the evaporation space; and

[0012] The ultraviolet cleaning lamp is installed on the inner wall of the evaporation tower and located within the evaporation space;

[0013] The air inlet is connected to the air intake space, and the exhaust outlet is connected to the evaporation space.

[0014] In one possible implementation of this application, a liquid level pipe connected to the evaporation tower is also included, with the highest point of the liquid level pipe located between the isolation air plate and the bottom surface of the evaporation tower.

[0015] In one possible implementation of this application, a liquid seal section is provided on the liquid level tube;

[0016] The liquid seal section is located below the bottom surface of the evaporator.

[0017] In one possible implementation of this application, a flow rate sensor is also included, located within the evaporation space and above the flexible packing.

[0018] In one possible implementation of this application, there are multiple flow rate sensors, which are evenly arranged around the hollow water distributor.

[0019] In one possible implementation of this application, a flexible packing regenerator connected to the evaporation tower is also included, the flexible packing regenerator being configured to regenerate the flexible packing within the evaporation space.

[0020] In one possible implementation of this application, the flexible packing regenerator includes:

[0021] The regeneration tower has a regeneration space and a pneumatic space;

[0022] Connecting pipes to the evaporation and regeneration spaces;

[0023] The return pipe connects to the regeneration space and the evaporation space; and

[0024] The pressure regenerator is located on the regeneration tower, and the working part of the pressure regenerator is located in the regeneration space.

[0025] In one possible implementation of this application, the pressure regenerator includes:

[0026] The first actuator is located on the regeneration tower;

[0027] The connecting rod is located within the regeneration space and is connected to the first actuator;

[0028] The first pressure plate is located on the connecting rod;

[0029] The second pressure plate is connected to the first pressure plate;

[0030] The second driver is mounted on the connecting rod and connected to the second pressure plate;

[0031] Both the first and second pressure plates have channels, and the maximum width of the channels changes when the first and second pressure plates rotate relative to each other.

[0032] The maximum width of the channel is greater than the maximum diameter of the flexible packing, and the minimum width of the channel is less than the maximum diameter of the flexible packing.

[0033] In one possible implementation of this application, an isolation cover net connected to the evaporation tower or the isolation air plate is also included;

[0034] The isolation shield is located inside the evaporation space;

[0035] The portion of the hollow water distributor located within the evaporation space is inside the isolation cover mesh;

[0036] Along the axial direction of the hollow water distributor, partition plates are alternately installed on the isolation cover and the inner wall of the evaporation tower;

[0037] The width of the partition plate is less than the minimum straight-line distance between the isolation cover and the inner wall of the evaporation tower.

[0038] In one possible implementation of this application, the free side of the partition plate is tilted towards the direction of the windbreak plate. Attached Figure Description

[0039] Figure 1 This is a structural schematic diagram of a flexible packed bed ultragravity evaporator provided in this application.

[0040] Figure 2 This is a schematic diagram of the liquid flow path inside an evaporation tower provided in this application.

[0041] Figure 3 This is a schematic diagram of the gas flow path inside an evaporation tower provided in this application.

[0042] Figure 4 This is a structural schematic diagram of another flexible packed bed ultragravity evaporator provided in this application.

[0043] Figure 5 This is a structural schematic diagram of a pressure regenerator provided in this application.

[0044] Figure 6 This is a schematic diagram of the overlapping channels on the first and second pressure plates provided in this application.

[0045] Figure 7 This is a schematic diagram of a first pressure plate and a second pressure plate provided in this application when the channels do not overlap.

[0046] Figure 8 This is a structural schematic diagram of another flexible packed bed ultragravity evaporator provided in this application.

[0047] In the diagram, 1. Evaporation tower, 2. Isolation air plate, 3. Hollow water distributor, 4. Water inlet pipe, 5. Flexible packing, 6. Ultraviolet cleaning lamp, 7. Flexible packing regenerator, 11. Evaporation space, 12. Air inlet space, 13. Flow rate sensor, 14. Isolation cover, 15. Divider plate, 71. Regeneration tower, 72. Connecting pipe, 73. Return pipe, 74. Pressure regenerator, 101. Air inlet, 102. Exhaust port, 103. Liquid level pipe, 104. Liquid seal section, 741. First actuator, 742. Connecting rod, 743. First pressure plate, 744. Second pressure plate, 745. Second actuator. Detailed Implementation

[0048] The technical solutions in this application will be further described in detail below with reference to the accompanying drawings.

[0049] This application discloses a flexible packed bed ultragravity evaporator; for some examples, please refer to [link / reference needed]. Figure 1 The flexible packed bed ultragravity evaporator disclosed in this application includes an evaporation tower 1, an isolation air plate 2, a hollow water distributor 3, a water inlet pipe 4, flexible packing 5, and an ultraviolet cleaning lamp 6. The evaporation tower 1 has an air inlet 101 and an exhaust port 102. The function of the air inlet 101 is to introduce high-temperature gas into the evaporation tower 1, and the function of the exhaust port 102 is to discharge excess gas in the evaporation tower 1. The excess gas here is mainly air and water vapor.

[0050] The isolation air plate 2 is fixedly installed on the evaporation tower 1 or the internal hollow water distributor 3. The isolation air plate 2 divides the space inside the evaporation tower 1 into two parts, namely the evaporation space 11 and the air inlet space 12. The evaporation space 11 is located above the isolation air plate 2, and the air inlet space 12 is located below the isolation air plate 2.

[0051] The isolation air plate 2 is evenly distributed with through holes, so that the evaporation space 11 and the air intake space 12 are connected.

[0052] The evaporation space 11 is located above the intake space 12. The intake port 101 is connected to the intake space 12, and the exhaust port 102 is connected to the evaporation space 11.

[0053] Hollow water separator 3 is located inside evaporation tower 1 and rotatably connected to evaporation tower 1. The first end of hollow water separator 3 communicates with the space outside evaporation tower 1. Hollow water separator 3 is also connected to evaporation space 11. For example, the surface of hollow water separator 3 is evenly distributed with fine pores, the function of which is to send the liquid to be evaporated (hereinafter referred to as liquid) into the evaporation space 11. Figure 2 As shown.

[0054] In some possible implementations, there is also a drive motor at the bottom of the evaporator tower 1, which is connected to the hollow water distributor 3 and drives the hollow water distributor 3 to rotate.

[0055] The first end of the inlet pipe 4 is used to connect to the water source, and the second end extends into the first end of the hollow water distributor 3, which can send liquid into the interior of the hollow water distributor 3. During the rotation of the hollow water distributor 3, it can send liquid into the flexible packing 5 filled in the evaporation space 11.

[0056] In some possible implementations, the second end of the inlet pipe 4 extends into the hollow water distributor 3 and sprays the liquid directly onto the inner wall of the hollow water distributor 3. This method can make the liquid distribution in the hollow water distributor 3 more uniform and avoid the phenomenon of liquid accumulating at the bottom of the hollow water distributor 3.

[0057] If liquid accumulates at the bottom of the hollow water distributor 3, the contact time between this liquid and the high-temperature gas will be too short, and it will not be able to evaporate completely.

[0058] The ultraviolet cleaning lamp 6 is located on the inner wall of the evaporation tower 1 and within the evaporation space 11. Here, it is necessary to introduce the photo-cleaning technology, which uses the photosensitive oxidation effect of organic compounds to remove organic substances adhering to the surface of materials.

[0059] In more detail: UV light sources emit light waves with a wavelength of 254nm, which have high energy. When these photons act on the surface of the object being cleaned, most hydrocarbons have a strong absorption capacity for 185nm wavelength ultraviolet light. After absorbing the energy of 254nm wavelength ultraviolet light, they decompose into ions, free atoms, excited molecules, and neutrons. This is the so-called photosensitivity effect.

[0060] Oxygen molecules in the air absorb ultraviolet light at a wavelength of 254 nm, producing ozone and atomic oxygen. Ozone also strongly absorbs ultraviolet light at 254 nm, and decomposes into atomic oxygen and oxygen gas. Atomic oxygen is highly reactive; under its influence, the decomposition products of carbon and hydrocarbons on surfaces can be converted into volatile gases such as carbon dioxide and water vapor, which then escape from the surface, thus thoroughly removing carbon and organic pollutants adhering to the surface. This also reduces COD in water.

[0061] Please see Figure 2 and Figure 3 During the evaporation process, the liquid flows into the hollow water separator 3 through the inlet pipe 4. As the hollow water separator 3 rotates at high speed, it sends the liquid into the flexible packing 5. The hot air flowing upward in the evaporation tower 1 comes into contact with the liquid flowing downward in the flexible packing 5. The water in the liquid is vaporized into water vapor and discharged from the exhaust port 102. The concentrated wastewater flows into the air inlet space 12 for temporary storage and is finally discharged from the air inlet space 12.

[0062] The advantages of this application are:

[0063] Under the influence of supergravity, gas-liquid exchange is enhanced, improving energy utilization and evaporation efficiency. The centrifugal force provided by high-speed rotation can fully disperse the liquid into the flexible packing 5.

[0064] Of course, for further increases in rotation speed, the isolation air plate 2 can be fixedly installed on the evaporation tower 1, because the hollow water distributor 3 can rotate at a higher speed.

[0065] The liquid sprayed from the hollow water distributor 3 impacts and washes the flexible packing 5, causing the salt crystals on the surface of the flexible packing 5 to detach and finally fall into the air intake space 12, thus solving the blockage problem.

[0066] The use of flexible filler material 5 made of non-metallic materials solves the corrosion problem of traditional metallic materials. Non-metallic materials include carbon fiber, nylon fiber and polytetrafluoroethylene fiber, which solve the corrosion problem.

[0067] In some examples, please refer to Figure 1 A liquid level pipe 103 was added to connect to the evaporator 1. The highest point of the liquid level pipe 103 is located between the isolation air plate 2 and the bottom surface of the evaporator 1. The function of the liquid level pipe 103 is to ensure that a certain amount of liquid is always stored at the bottom of the evaporator 1 to prevent drying out, as drying out would cause salt crystals to condense on the bottom surface of the evaporator 1, leading to blockage problems.

[0068] Furthermore, a liquid seal section 104 was added to the liquid level pipe 103. The liquid seal section 104 is located below the bottom surface of the evaporation tower 1. The purpose is to control the amount of water stored on the bottom surface of the evaporation tower 1 and to prevent hot air from escaping from the liquid level pipe 103 after entering the evaporation tower 1.

[0069] In some examples, a flow rate sensor 13 is added within the evaporation space 11. Located above the flexible packing 5, the sensor detects the airflow velocity at its location. This airflow velocity is positively correlated with the degree of blockage in the flexible packing 5, as blockage inevitably occurs during prolonged use. It should be noted that this design is for cases where the isolation baffle 2 is not rotating.

[0070] Furthermore, there are multiple flow rate sensors 13, which are evenly arranged around the hollow water distributor 3 to detect the air flow speed at multiple locations.

[0071] This application uses a flexible packing regenerator 7 connected to the evaporation tower 1 to solve the above problems. The flexible packing regenerator 7 is configured to regenerate the flexible packing 5 in the evaporation space 11.

[0072] Please see Figure 4The flexible packing regenerator 7 includes a regeneration tower 71, a connecting pipe 72, a return pipe 73, and a pressure regenerator 74. The regeneration tower 71 has a regeneration space 711 and a pneumatic space 712 inside. The two ends of the connecting pipe 72 are connected to the evaporation space 11 and the regeneration space 711. The two ends of the return pipe 73 are connected to the regeneration space 711 and the evaporation space 11.

[0073] The flexible packing 5 that needs to be regenerated flows into the regeneration tower 71 through the connecting pipe 72 and is regenerated by the pressure regenerator 74. Then it is returned to the evaporation space 11 through the return pipe 73.

[0074] The regeneration principle of the pressure regenerator 74 is to separate the salt crystals from the flexible packing 5 by extrusion. Because the two have different hardness, the salt crystals can be broken and separated from the flexible packing 5 by physical extrusion.

[0075] Please see Figure 5 The pressure regenerator 74 includes a first driver 741, a connecting rod 742, a first pressure plate 743, a second pressure plate 744, and a second driver 745. The first driver 741 is fixedly mounted on the regeneration tower 71, for example, using an electric cylinder or a hydraulic cylinder. The connecting rod 742 is located within the regeneration space 711 and connected to the first driver 741, enabling it to perform linear reciprocating motion along the axial direction under the drive of the first driver 741.

[0076] The first pressure plate 743 is fixed on the connecting rod 742 and moves together with the connecting rod 742.

[0077] The second pressure plate 744 is connected to the connecting rod 742 or the first pressure plate 743. At the same time, the second driver 745 is disposed on the connecting rod 742 and connected to the second pressure plate 744. The function of the second driver 745 is to drive the second pressure plate 744 to swing back and forth around the connecting rod 742.

[0078] contrast Figure 5 and Figure 6 Both the first pressure plate 743 and the second pressure plate 744 have channels. When the first pressure plate 743 and the second pressure plate 744 rotate relative to each other, the maximum width of the channel changes. The size of the channel is limited as follows: the maximum width of the channel is greater than the maximum diameter of the flexible packing 5, and the minimum width of the channel is less than the maximum diameter of the flexible packing 5.

[0079] When the second pressure plate 744 rotates, it can either make the channels of the first pressure plate 743 and the second pressure plate 743 coincide, thus being in an open state, or it can make the channels of the first pressure plate 743 and the second pressure plate 743 not coincide, thus being in a closed state. By adjusting the positions of the first pressure plate 743 and the second pressure plate 744, the flexible packing 5 can be regenerated by compression, and the flexible packing 5 can be blown back into the evaporation tower 1 using compressed air.

[0080] In some examples, please refer to Figure 8 Furthermore, an isolation cover 14 connected to the evaporation tower 1 or the isolation air plate 2 was added. The isolation cover 14 is located inside the evaporation space 11 and also wraps the part of the hollow water distributor 3 located inside the evaporation space 11.

[0081] The function of the isolation cover 14 is to prevent the flexible packing 5 from coming into contact with the rotating hollow water separator 3, which would cause wear.

[0082] In some examples, along the axial direction of the hollow water distributor 3, partition plates 15 are alternately provided on the inner wall of the isolation cover 14 and the evaporation tower 1, and the width of the partition plate 15 is less than the minimum straight-line distance between the isolation cover 14 and the inner wall of the evaporation tower 1.

[0083] The function of the separator 15 is to restrict the flow path of the flexible packing 5 during the regeneration of the flexible packing 5, thereby ensuring that most of the flexible packing 5 can be regenerated.

[0084] Furthermore, the free side of the partition plate 15 is tilted towards the direction of the isolation air plate 2.

[0085] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A flexible packed bed ultragravity evaporator, characterized in that, include: An evaporation tower has an air inlet and an exhaust outlet; An isolation air plate is installed inside the evaporation tower. The isolation air plate divides the space inside the evaporation tower into an evaporation space and an air intake space. The evaporation space is located above the air intake space. The air inlet is connected to the air intake space, and the exhaust outlet is connected to the evaporation space. A hollow water distributor is installed inside the evaporation tower and is rotatably connected to the evaporation tower. The first end of the hollow water distributor is connected to the space outside the evaporation tower. The hollow water distributor is also connected to the evaporation space. Fine pores are evenly distributed on the surface of the hollow water distributor. The inlet pipe has one end for connecting to the water source and the other end for extending into the first end of the hollow water distributor. Flexible packing material is used to fill the evaporation space; and The ultraviolet cleaning lamp is installed on the inner wall of the evaporation tower and located within the evaporation space; It also includes a flexible packing regenerator connected to the evaporation tower, which is configured to regenerate the flexible packing within the evaporation space; Flexible packing regenerators include: The regeneration tower has a regeneration space and a pneumatic space; The two ends of the connecting pipe are connected to the evaporation space and the regeneration space, respectively; The two ends of the return pipe are connected to the regeneration space and the evaporation space, respectively; And a pressure regenerator, which is located on the regeneration tower, with the working part of the pressure regenerator located in the regeneration space; the flexible packing material to be regenerated flows into the regeneration tower through the connecting pipe and is regenerated by the pressure regenerator, and then returns to the evaporation space through the return pipe. Pressure regenerators include: The first actuator is located on the regeneration tower; The connecting rod is located within the regeneration space and is connected to the first actuator; The first pressure plate is mounted on the connecting rod; the first driver drives the connecting rod to drive the first pressure plate to perform linear reciprocating motion along the axial direction. The second pressure plate is connected to the first pressure plate; The second actuator is mounted on the connecting rod and connected to the second pressure plate; the second actuator drives the second pressure plate to swing back and forth around the connecting rod. Both the first and second pressure plates have channels, and the maximum width of the channels changes when the first and second pressure plates rotate relative to each other. The maximum width of the channel is greater than the maximum diameter of the flexible packing, and the minimum width of the channel is less than the maximum diameter of the flexible packing. By adjusting the position of the first and second pressure plates, the flexible packing can be regenerated by compression and the flexible packing can be blown back into the evaporation tower using compressed air.

2. The flexible packed bed ultragravity evaporator according to claim 1, characterized in that, It also includes a level pipe connected to the evaporator, with the highest point of the level pipe located between the isolation air plate and the bottom surface of the evaporator.

3. The flexible packed bed ultragravity evaporator according to claim 2, characterized in that, The liquid level pipe is equipped with a liquid seal section; the liquid seal section is located below the bottom surface of the evaporation tower.

4. The flexible packed bed ultragravity evaporator according to any one of claims 1 to 3, characterized in that, It also includes a flow rate sensor located within the evaporation space, above the flexible packing.

5. The flexible packed bed ultragravity evaporator according to claim 4, characterized in that, There are multiple flow rate sensors, which are evenly arranged around the hollow water distributor.

6. The flexible packed bed ultragravity evaporator according to claim 1, characterized in that, It also includes the isolation cover mesh connected to the evaporator tower or the isolation air plate; The isolation shield is located inside the evaporation space; The portion of the hollow water distributor located within the evaporation space is inside the isolation cover mesh; Along the axial direction of the hollow water distributor, partition plates are alternately installed on the isolation cover and the inner wall of the evaporation tower; The width of the partition plate is less than the minimum straight-line distance between the isolation cover and the inner wall of the evaporation tower.

7. The flexible packed bed ultragravity evaporator according to claim 6, characterized in that, The free side of the partition plate is tilted towards the direction of the air isolation plate.

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