An evaporation device

Abstract

The application provides an evaporation device, belonging to the technical field of seawater treatment, which comprises a machine body, a shell and a driving piece, the shell is arranged in the machine body, and the driving piece is installed on the machine body, the inside of the shell is provided with a heating pipe, the heating pipe is arranged in a serpentine shape, rotates at the shaft centers of the two ends of the shell, the rotating diameter of the heating pipe is smaller than the inside wall diameter of the shell, and there is a spacing between the heating pipe and the inside wall of the shell, and rotating sealing pieces are arranged at the two ends of the heating pipe and used for improving the sealing performance of the inside of the shell; the heating pipe is arranged in the inside of the shell, so that the heating pipe can directly contact with seawater, the problem of heat energy loss is avoided, the heating pipe is arranged in a serpentine shape, the contact area of the heating pipe and seawater can be increased, the heat exchange efficiency is improved, and when the heating pipe rotates, seawater can be stirred, and the heat exchange efficiency can be further improved.

Description

Technical Field

[0001] This invention belongs to the field of seawater treatment technology, and specifically relates to an evaporation device. Background Technology

[0002] Seawater desalination refers to the process of removing salt and impurities from seawater through physical or chemical methods to achieve water quality that meets the standards for domestic or industrial use. Currently, mainstream desalination technologies include reverse osmosis, multi-stage flash evaporation, multi-effect distillation, and mechanical vapor recompression. Among these, evaporation crystallization technology is widely used in large-scale seawater desalination projects due to its advantages such as good treatment effect on high-salinity seawater, high-quality produced water, and simultaneous recovery of salt resources. However, existing evaporation devices generally suffer from low heat exchange efficiency, high energy consumption, and easy scaling, resulting in high water production costs and hindering the large-scale promotion of seawater desalination technology.

[0003] Chinese patent CN118062926B discloses an evaporation device, including an evaporation shell, a semi-cylinder, a discharge shell, and L-shaped scrapers. The semi-cylinder is fixedly arranged inside the evaporation shell, and a main shaft is assembled inside the semi-cylinder. A screw is assembled on the main shaft. The discharge shell is fixedly arranged at one end of the evaporation shell and connected to the evaporation shell. Several L-shaped scrapers are assembled on the main shaft, and a vibrating filter plate is elastically slidably assembled inside the L-shaped scrapers. This invention, by setting several rotatable L-shaped scrapers and a main shaft linked to the L-shaped scrapers in the evaporation shell, and setting a movable discharge shell for discharging crystals at one end of the evaporation shell, ensures that crystals are continuously discharged under negative pressure in the evaporation shell cavity, effectively reducing the amount of crystals remaining inside the evaporation container, thereby improving evaporation efficiency.

[0004] In the aforementioned technology, high-temperature flue gas is introduced through a waste heat pipe, indirectly heating the seawater in the evaporation chamber through the shell. This indirect heating method results in significant heat loss, leading to low thermal energy utilization and consequently affecting the overall evaporation efficiency of the seawater. Summary of the Invention

[0005] The purpose of this invention is to provide an evaporation device that addresses the problem in existing evaporation devices where the waste heat flue pipe is indirectly in contact with seawater, leading to wasted heat energy and affecting the evaporation efficiency of seawater.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an evaporation device, comprising: a main body, a shell, and a driving component, wherein the shell is disposed within the main body, and the driving component is mounted on the main body; a heating tube is disposed inside the shell, the heating tube being arranged in a serpentine shape, with both ends rotating at the axis at both ends of the shell; the rotation diameter of the heating tube is smaller than the inner wall diameter of the shell, and there is a gap between the heating tube and the inner wall of the shell; rotating seals are disposed at both ends of the heating tube to improve the sealing performance inside the shell; and the driving component is capable of driving the seals to rotate.

[0007] A further technical solution of the present invention is that each straight section of the heating tube is provided with a cleaning ring, and multiple cleaning rings are in contact with the outer wall of the heating tube and are connected as one unit by a connecting column. A first rotating plate is hinged to the cleaning rings located on both sides, and a second rotating plate is hinged to both ends of the heating tube. The second rotating plate is located on the rotation axis of the heating tube. A first elastic member is provided on the second rotating plate to push the first rotating plate away. When the first elastic member is in its natural state, the first rotating plate deviates from the axis of the heating tube. A pusher is provided inside the housing. When the cleaning ring rotates, it slides on the heating tube by abutting against the connecting column through the pusher.

[0008] A further technical solution of the present invention is that the pusher includes a horizontal plate, which is located in the recessed area of ​​the heating tube and is lower than the rotation axis of the heating tube. A push block is provided on the connecting column. The push block is disc-shaped and has a sliding groove in the middle. The connecting column can only slide in the sliding groove. The length direction of the sliding groove is perpendicular to the sliding direction of the cleaning ring along the heating tube. A second elastic element is also provided in the sliding groove.

[0009] A further technical solution of the present invention is that the heating tube is provided with connecting plates at both ends, the two connecting plates are arranged symmetrically, and a wedge is provided at the end of the connecting plates that is far apart from each other. The inclined surfaces of the two wedges are arranged opposite each other. Pushing columns are provided at both ends of the pushing frame. When the heating tube drives the wedges to revolve, the inclined surfaces of the two wedges can alternately abut against the two pushing columns and push the pushing columns to move.

[0010] A further technical solution of the present invention is that a third elastic element is provided at both the upper and lower ends of the cleaning ring, and a cleaning plate is provided at the end of the third elastic element away from the cleaning ring, and the cleaning plate is slidably disposed on the outer surface of the heating tube.

[0011] A further technical solution of the present invention is that a sealing cover is provided on the outer side wall at both ends of the housing, and the two ends of the heating tube are connected to the inside of the sealing cover. An air inlet pipe is connected to one of the sealing covers, and a waste heat smoke pipe is connected to the other sealing cover. The waste heat smoke pipe extends to the bottom of the housing and is distributed in a serpentine shape, and fits against the bottom of the housing.

[0012] A further technical solution of the present invention is that the push frame is provided with a plurality of ribs, and the ribs are in contact with the inner wall of the housing.

[0013] A further technical solution of the present invention is that a gap is provided at the connection between the driving component and the sealing block, so that the heating medium flows into the interior of the heating tube through the gap.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. By placing the heating tube inside the shell, the heating tube can directly contact the seawater, avoiding the problem of heat loss. Furthermore, the serpentine distribution of the heating tube increases the contact area between the heating tube and the seawater, improving heat exchange efficiency. In addition, when the heating tube rotates, it can stir the seawater, which can further improve the heat exchange efficiency.

[0015] 2. By installing a descaling device on the heating tube, the heating tube can be automatically descaled and crystals removed when it rotates, thus avoiding the problem of poor heat exchange efficiency caused by scale buildup on the heating tube. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of a specific embodiment of the present invention; Figure 2 This is a cross-sectional view of a specific embodiment of the present invention; Figure 3 This is a schematic diagram of the waste heat flue pipe in a specific embodiment of the present invention; Figure 4 This is a schematic diagram of the heating tube structure in a specific embodiment of the present invention; Figure 5 for Figure 4 Enlarged structural diagram at point A; Figure 6 This is a schematic diagram of the descaling device in a specific embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the connector and the sealing block in a specific embodiment of the present invention; Figure 8 for Figure 4 Enlarged schematic diagram of the structure at point B.

[0017] In the diagram: 1. Body; 11. Condensation system; 12. Support; 2. Shell; 21. Liquid inlet; 22. Exhaust outlet; 23. Slag discharge pipe; 3. Heating tube; 31. Connecting plate; 32. Wedge; 4. Seal; 41. Sealing block; 411. Protrusion; 412. Connecting piece; 413. Locking block; 42. Annular groove; 43. Sealing cover; 44. Air inlet pipe; 45. Waste heat flue pipe; 5. Drive component; 6. Descaling device; 61. Cleaning ring; 611. First rotating plate; 612. Second rotating plate; 613. First elastic element; 62. Connecting column; 63. Push frame; 631. Horizontal plate; 632. Push column; 633. Rib; 64. Push block; 641. Slide groove; 65. Second elastic element; 66. Third elastic element; 67. Cleaning plate; 7. Valve. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-8 The present invention provides the following technical solution: an evaporation device, comprising a body 1, a shell 2, a heating tube 3, a rotary seal 4, and a driving component 5.

[0020] The shell 2 is cylindrical and horizontally arranged inside the body 1. The heating tube 3 is arranged in a serpentine shape and can rotate inside the shell 2. Rotary seals 4 are provided at both ends of the heating tube 3 so that the circulation of high-temperature gas inside the heating tube 3 is not affected when the heating tube 3 rotates. The driving component 5 is installed on the body 1 to drive the heating tube 3 to rotate. By placing the heating tube 3 inside the shell 2, it can directly contact the seawater inside the shell 2, avoiding the problem of large heat loss in indirect heating. At the same time, the rotation of the heating tube 3 can stir the seawater, improving the heating and evaporation efficiency of the seawater.

[0021] The machine body 1 is a horizontal device with a condensation system 11 installed on top for condensing the steam inside the shell 2. A bracket 12 is installed on one side for mounting the drive component 5.

[0022] The shell 2 is provided with a liquid inlet 21 for adding seawater into the shell 2. An exhaust port 22 is provided at the top, which is connected to a vacuum pump (not shown in the figure) to evacuate the inside of the shell 2 to lower the boiling point of the seawater. A slag discharge pipe 23 is provided at the bottom of the shell 2 for discharging solid waste such as crystals and scale.

[0023] Please see Figure 7 The rotary seal 4 includes sealing blocks 41 disposed at both ends of the heating tube 3. The sealing blocks 41 are provided with annular grooves 42. The two side walls of the housing 2 are fitted inside the annular grooves 42. A sealing bearing (not shown in the figure) is disposed inside the annular grooves 42. This can reduce the friction between the heating tube 3 and the housing 2. Furthermore, the sealing effect inside the housing 2 can be improved by the sealing blocks 41 and the sealing bearings, thus avoiding gas leakage when the housing 2 is evacuated. At the same time, it does not affect the free rotation of the heating tube 3.

[0024] Please see Figure 2 and Figure 7Sealing covers 43 are provided on the outer walls at both ends of the housing 2. The interior of the heating tube 3 is located inside the sealing cover 43, so that the heating tube 3 is connected to the interior of the sealing cover 43. An air inlet pipe 44 is connected to one of the sealing covers 43, and the air inlet pipe 44 is connected to the interior of the sealing cover 43. High-temperature flue gas is introduced into the air inlet pipe 44, so that the high-temperature flue gas is guided into the interior of the sealing cover 43 by the air inlet pipe 44, and then enters the heating tube 3 through the sealing cover 43. A waste heat flue pipe 45 is connected to the other sealing cover 43, and the waste heat flue pipe 45 is connected to the interior of the sealing cover 43. When the high-temperature flue gas inside the heating tube 3 flows, it can enter the sealing cover 43, and then enter the waste heat flue pipe 45 through the sealing cover 43. The waste heat flue pipe 45 is also serpentine and has a certain curvature, so that the waste heat flue pipe 45 can fit against the bottom of the housing 2 (see [reference]). Figure 3 When high-temperature flue gas passes through the waste heat pipe 45, the waste heat in the high-temperature flue gas can be used to improve the overall thermal efficiency and reduce the heat loss of the evaporator wall. The flue gas outlet end of the waste heat pipe 45 extends to the outside of the machine body 1 and is located on the same side as the air inlet pipe 44, and is connected to the external heating equipment together, so that the heating pipe 3 and the flue gas inside the waste heat pipe 45 form a circulation.

[0025] A ring array of protrusions 411 is provided on the sealing block 41 near the drive member 5. The output end of the drive member 5 extends into the interior of the sealing cover 43 and is provided with a connector 412. The connector 412 is provided with multiple locking blocks 413. The locking blocks 413 can be locked between the multiple protrusions 411, and the length of the locking blocks 413 is greater than the length of the protrusions 411, so that a gap can be left between the multiple locking blocks 413. When the drive member 5 is running, it can drive the connector 412 to rotate, so that the connector 412 drives the sealing block 41 to rotate through the locking blocks 413. At the same time, the gap setting of the locking blocks 413 allows the high temperature flue gas to flow into the interior of the heating tube 3 through the gap.

[0026] Please see Figure 4 In actual operation, scale easily forms on the walls of the heat exchange tubes. This problem not only significantly reduces heat transfer efficiency and increases energy consumption, but also leads to frequent shutdowns for cleaning, restricting its ability to continuously and stably process seawater, and indirectly affecting its effectiveness in protecting the marine environment. Therefore, a descaling device 6 is installed on the heating tube 3.

[0027] Please see Figure 4 , Figure 5 and Figure 6The descaling device 6 consists of multiple cleaning rings 61 that are slidably fitted onto the straight section of the heating tube 3, with the inner wall of each cleaning ring 61 in contact with the outer wall of the heating tube 3. The multiple cleaning rings 61 are connected as a single unit by connecting posts 62, allowing them to slide synchronously along the heating tube 3. First rotating plates 611 are hinged to the cleaning rings 61 on both sides, and second rotating plates 612 are hinged to both ends of the heating tube 3, with the second rotating plates 612 located on the rotation axis of the heating tube 3. A first elastic element 613, a compression spring, is provided between the first rotating plate 611 and the second rotating plate 612, with one end fixed to the first rotating plate 611 and the other end fixed to the second rotating plate 612. When the first elastic element 613 is in its natural state, the first rotating plate 611 is offset from the axis of the heating tube 3, and the cleaning rings 61 are located at the ends of the straight sections of the heating tube 3.

[0028] The housing 2 contains a pusher frame 63 with multiple horizontal plates 631 mounted on it. These horizontal plates 631 are all located in the recessed area of ​​the heating tube 3 and are lower than the rotation axis of the heating tube 3. A push block 64, which is disc-shaped, is mounted on the connecting column 62 and has a groove 641 in the center, allowing the connecting column 62 to slide within the groove 641. Because the connecting column 62 has a rectangular cross-section, it prevents rotation within the groove 641. The sliding direction of the connecting column 62 within the groove 641 is perpendicular to the sliding direction of the cleaning ring 61 along the heating tube 3. Two second elastic elements 65 are also provided within the groove 641 to keep the connecting column 62 in the center of the groove 641 when no external force is applied.

[0029] When the heating tube 3 rotates, it causes the cleaning ring 61 and the push block 64 to revolve together. During rotation, the push block 64 first contacts the horizontal plate 631, causing the connecting post 62 to slide along the slide groove 641, while simultaneously compressing the second elastic element 65 on one side, causing the push block 64 to deflect towards one side of the connecting post 62. When the connecting post 62 slides to the limit position at one end of the slide groove 641, the rotation angle of the heating tube 3 has exceeded 90°, at which point the cleaning ring 61 is below the rotation axis of the heating tube 3. As the heating tube 3 continues to rotate, the push block 64 slides on the upper surface of the horizontal plate 631, pushing the cleaning ring 61 to slide along the surface of the heating tube 3, while the first elastic element 613 is compressed. Since the push block 64 has a disc structure, as it slides on the horizontal plate 631, the vertical distance between its axis and the upper surface of the horizontal plate 631 gradually increases, so that the cleaning ring 61 can be pushed past the limit compression position of the first elastic element 613, i.e., the rotation axis of the heating tube 3, before the rotation angle reaches 180°. Once the cleaning ring 61 crosses the axis, the first elastic element 613 quickly resets, pushing the cleaning ring 61 to continue sliding along the heating tube 3, thereby scraping off the scale accumulated on the surface of the heating tube 3 and effectively preventing scale from affecting the heat exchange efficiency.

[0030] Please see Figure 4Connecting plates 31 are provided at both ends of the heating tube 3, with an angle of 180° between the two connecting plates 31 and perpendicular to the straight section of the heating tube 3. Wedges 32 are provided at the ends of the two connecting plates 31 away from the rotation axis of the heating tube 3, with the inclined surfaces of the two wedges 32 facing each other. When the heating tube 3 rotates, it can drive the connecting plates 31 and wedges 32 to revolve. Pushing columns 632 are provided at both ends of the pusher frame 63. When the wedges 32 revolve, the inclined surface of one of the wedges 32 can abut against the pusher column 632. At this time, the heating tube 3 rotates to a horizontal state, and the horizontal plate 631 has disengaged from the concave area of ​​the heating tube 3. The inclined surface pushes the pusher column 632 to move inside the shell 2 along the axis of the shell 2, which can drive the horizontal plate 631 to move. The horizontal plate 631 is positioned below the adjacent recessed area, so that when the heating tube 3 continues to rotate, the horizontal plate 631 can avoid interfering with the bent section of the heating tube 3. Then, the wedge 32 disengages from the corresponding push post 632, and another wedge 32 abuts against its corresponding push post 632, thereby causing the push frame 63 to move in the opposite direction.

[0031] Multiple ribs 633 are provided on the push frame 63. The ribs 633 are in contact with the inner wall of the shell 2. Therefore, when the push frame 63 moves back and forth, it can clean the impurities and scale at the bottom of the shell 2. In order to improve the stability of the push frame 63, a limiting groove (not shown in the figure) is provided inside the shell 2, so that the push frame 63 is stuck inside the limiting groove, so that the push frame 63 can only slide along the axis of the shell 2, preventing the push frame 63 from rotating inside the shell 2. An inclined surface is provided on one side of the ribs 633. When the push frame 63 moves back and forth, the solid waste in the shell 2 will move to the other side of the ribs 633 through the inclined surface, and push the solid waste towards the slag discharge pipe 23 through the vertical plane of the ribs 633, thereby discharging the solid waste in the shell 2.

[0032] Please see Figure 6 A third elastic element 66 is fixedly connected to the upper and lower ends of the cleaning ring 61. A cleaning plate 67 is fixedly connected to the end of the third elastic element 66 away from the cleaning ring 61. The cleaning plate 67 is annular, and its inner ring can contact the outer surface of the heating tube 3 and slide on the outer surface of the heating tube 3. When the cleaning ring 61 slides on the heating tube 3 to the limit of the straight section, the cleaning plate 67 can slide on the arc section of the heating tube 3 under the push of the third elastic element 66, thereby cleaning the scale on the arc section of the heating tube 3.

[0033] Please see Figure 2Two valves 7 are installed on the slag discharge pipe 23. When the first valve 7 is opened, the solid waste inside the shell 2 will enter between the two valves 7. Then the first valve 7 is closed and the second valve 7 is opened, so that the solid waste between the two valves 7 can be cleaned, and the pressure inside the shell 2 can also be maintained.

Claims

1. An evaporation apparatus, comprising: The machine body (1), the shell (2) and the drive component (5) are provided. The shell (2) is located inside the machine body (1) and the drive component (5) is installed on the machine body (1). The characteristic is that a heating tube (3) is provided inside the shell (2). The heating tube (3) is arranged in a serpentine shape and its two ends rotate at the axis at both ends of the shell (2). The rotation diameter of the heating tube (3) is smaller than the inner wall diameter of the shell (2) and there is a gap between it and the inner wall of the shell (2). Rotary sealing components (4) are provided at both ends of the heating tube (3) to improve the sealing performance inside the shell (2). The drive component (5) can drive the sealing components (4) to rotate.

2. The evaporation apparatus according to claim 1, characterized in that: Cleaning rings (61) are provided on the straight sections of the heating tube (3). Multiple cleaning rings (61) are in contact with the outer wall of the heating tube (3) and are connected as one unit by connecting columns (62). The cleaning rings (61) on both sides are hinged with first rotating plates (611). The two ends of the heating tube (3) are hinged with second rotating plates (612). The second rotating plates (612) are located on the rotation axis of the heating tube (3). The second rotating plates (612) are provided with first elastic members (613) that push the first rotating plates (611) away. When the first elastic member (613) is in its natural state, the first rotating plates (611) deviate from the axis of the heating tube (3). The housing (2) is provided with a pusher (63). When the cleaning ring (61) rotates, it slides on the heating tube (3) by pushing the pusher (63) against the connecting column (62).

3. An evaporation apparatus according to claim 2, characterized in that: The pusher (63) includes a horizontal plate (631), which is located in the recessed area of ​​the heating tube (3) and is lower than the rotation axis of the heating tube (3). A push block (64) is provided on the connecting column (62). The push block (64) is disc-shaped and has a groove (641) in the middle. The connecting column (62) can only slide in the groove (641). The length direction of the groove (641) is perpendicular to the sliding direction of the cleaning ring (61) along the heating tube (3). A second elastic element (65) is also provided in the groove (641).

4. An evaporation apparatus according to claim 3, characterized in that: The heating tube (3) is provided with connecting plates (31) at both ends. The two connecting plates (31) are arranged symmetrically. A wedge (32) is provided at the end of the connecting plates (31) that is far apart from each other. The inclined surfaces of the two wedges (32) are arranged facing each other. Pushing columns (632) are provided at both ends of the push frame (63). When the heating tube (3) drives the wedges (32) to revolve, the inclined surfaces of the two wedges (32) can alternately abut against the two pushing columns (632) and push the pushing columns (632) to move.

5. An evaporation apparatus according to claim 2, characterized in that: The cleaning ring (61) is provided with a third elastic element (66) at both the upper and lower ends. A cleaning plate (67) is provided at the end of the third elastic element (66) away from the cleaning ring (61). The cleaning plate (67) is slidably disposed on the outer surface of the heating tube (3).

6. An evaporation apparatus according to claim 2, characterized in that: Sealing covers (43) are provided on the outer walls at both ends of the housing (2). The two ends of the heating tube (3) are connected to the inside of the sealing cover (43). An air inlet pipe (44) is connected to one of the sealing covers (43), and a waste heat smoke pipe (45) is connected to the other sealing cover (43). The waste heat smoke pipe (45) extends to the bottom of the housing (2) and is distributed in a serpentine shape, and fits against the bottom of the housing (2).

7. An evaporation apparatus according to claim 6, characterized in that: The push frame (63) is provided with multiple ribs (633), and the ribs (633) are in contact with the inner wall of the shell (2).

8. An evaporation apparatus according to claim 1, characterized in that: A gap is provided at the connection between the drive component (5) and the sealing block (41) so that the heating medium can flow through the gap into the interior of the heating tube (3).

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