Evaporator with recyclable scraper

Abstract

The invention provides an evaporator with recoverable scrapers, which belongs to the field of evaporators and comprises a distillation cylinder and a heating sleeve. The distillation cylinder comprises a central bearing platform, a rotating mechanism, a telescopic mechanism and a scraper mechanism; the heating sleeve sleeves the outer side of the distillation cylinder; the first driving piece in the rotating mechanism drives the rotating sleeve to axially rotate, the rotating sleeve drives the supporting column to axially rotate, and the supporting column drives the unfolded scraper to axially rotate and clean crystals at the bottom of the distillation cylinder; a second driving piece in the telescopic mechanism drives an abutting table to move towards or close to a separation supporting table, the abutting table drives a supporting column to slide back and forth along a rotating sleeve, the supporting column pushes a scraper to be unfolded and attached to the bottom of a distillation cylinder when descending, and the scraper retracts when ascending, so that crystal attachment is reduced; the heating sleeve and the heating device are additionally arranged on the outer side of the distillation cylinder in a sleeving manner, so that uniform heating is ensured; the heating efficiency is optimized, the distillation time is shortened, and the treatment capacity is improved.

Description

Technical Field

[0001] This invention belongs to the field of evaporators, and in particular relates to an evaporator with recyclable scraper. Background Technology

[0002] In chemical, pharmaceutical, food processing, and wastewater treatment industries, evaporators are core equipment for solution concentration. However, in actual operation, solute crystallization at the bottom of the evaporator often leads to serious operational problems, especially when processing solutions with high solubility or high concentration. Due to the lower fluid velocity, uneven heat transfer, or localized supersaturation in the bottom region, solutes easily deposit and crystallize at the bottom. The accumulation of crystals not only reduces heat transfer efficiency and increases energy consumption, but can also clog pipes, wear down equipment, and even force frequent shutdowns for cleaning, seriously affecting the continuity and economy of production.

[0003] Currently, common solutions to the problem of crystallization at the bottom of evaporators include adding a stirring structure, adding a bottom drain device, or introducing an online cleaning system. Although mechanical stirring structures can improve bottom flow, crystals can still easily adhere to the surfaces of components such as the stirring paddle and shaft. After long-term operation, the stirring efficiency decreases, and the equipment may even be jammed due to crystal accumulation. Adding a bottom drain device can periodically remove sediment, but it will result in the loss of effective materials, increase raw material costs, and increase the burden of subsequent waste liquid treatment. Although chemical cleaning can remove crystals, strong acids, strong alkalis, or chelating agents may corrode the inner wall of the equipment, affecting product purity, and frequent cleaning increases downtime. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide an evaporator with recyclable scraper, which solves the problems of increased energy consumption, equipment wear, increased maintenance costs and threats to product quality caused by crystallization on the surface of the stirring scraper in the prior art.

[0005] To achieve the above and other related objectives, the present invention provides an evaporator with recyclable scraper, comprising a distillation cylinder and a heating sleeve; The distillation cylinder includes a central support, a rotating mechanism, a telescopic mechanism, and a scraper mechanism; The central support is fixedly installed at the top of the distillation cylinder, and a guide cylinder arranged coaxially with the distillation cylinder is fixedly connected to the bottom of the central support; the guide cylinder penetrates the top wall of the distillation cylinder and extends downward into the interior of the distillation cylinder. The rotating mechanism is fixedly installed inside the central support platform and includes a rotating sleeve and a first driving member for driving the rotating sleeve to rotate axially; the top end of the rotating sleeve is hinged to the top wall of the central support platform; the rotating sleeve and the guide cylinder are arranged coaxially, and a partition support platform is provided between them. The telescopic mechanism includes a support column and a second driving member; the support column is slidably connected inside the rotating sleeve; the bottom end of the second driving member is fixedly connected to the partition support platform, and the top end of the second driving member is fixedly connected to an abutment platform; the second driving member drives the support column to reciprocate along the axis of the rotating sleeve through the abutment platform. The scraper mechanism is located at the bottom end of the support column, and extends and retracts with the extension and retraction of the support column; the scraper mechanism includes a scraper adapted to the bottom wall of the distillation cylinder and a push-pull component for extending and retracting the scraper. The heating sleeve is fitted around the outside of the distillation cylinder, and the top end of the heating sleeve is connected to an air inlet pipe, while the bottom end of the heating sleeve is connected to an air outlet pipe; the air inlet pipe and the air outlet pipe are respectively connected to an external heating device.

[0006] Optionally, a sealing cover is fixedly connected to the bottom end of the guide cylinder; a circular through hole is provided in the middle of the sealing cover; and the support column passes through the circular through hole and is used in conjunction with it.

[0007] Optionally, the first driving component includes a drive motor, a worm gear, and a worm wheel; the drive motor is fixedly connected inside the central support, and the output end of the drive motor is coaxially fixed with the worm gear; the worm wheel is coaxially sleeved on the outside of the rotating sleeve.

[0008] Optionally, the partition support platform is an annular support platform; the outer side of the partition support platform is fixedly connected to the guide cylinder, and the inner side of the partition support platform is hinged to the rotating sleeve through a first bearing; The abutment platform is an annular abutment platform; the outer side of the abutment platform is slidably connected to the guide cylinder, and the inner side of the abutment platform is hinged to the support column through a second bearing.

[0009] Optionally, a first slider is fixedly provided at the top of the side wall of the support column; there are multiple first sliders, and the multiple first sliders are evenly distributed along the circumference of the support column; The inner wall of the rotating sleeve is provided with a strip-shaped first groove along the axial direction; there are multiple first grooves, and the multiple first grooves are evenly distributed along the circumference of the rotating sleeve; The first slider and the first slide groove are arranged correspondingly, and the first slider and the first slide groove are used in conjunction.

[0010] Optionally, the scraper mechanism further includes a shuttle-shaped recycling frame; the recycling frame is arranged vertically and has a guide hole; the guide hole is used in conjunction with the support column.

[0011] Optionally, a second slider is fixedly provided at the bottom end of the side wall of the support column; there are multiple second sliders, and the multiple second sliders are evenly distributed along the circumference of the support column; The recycling rack has a strip-shaped second groove in the guide hole along the axial direction; there are multiple second grooves, and the multiple second grooves are evenly distributed around the guide hole. The second slider and the second slide groove are arranged correspondingly, and the second slider and the second slide groove are used in conjunction.

[0012] Optionally, the recycling rack has at least two strip-shaped through slots along the axial direction; the bottom end of the strip-shaped through slot is provided with a hinge shaft; the scraper is hinged to the inside of the strip-shaped through slot through the hinge shaft; one end of the push-pull member is hinged to the scraper, and the other end of the push-pull member is hinged to the bottom end of the support column.

[0013] Optionally, a plurality of vertically arranged guide vanes are fixedly connected inside the heating sleeve, and the plurality of guide vanes are evenly distributed along the circumference of the heating sleeve; two adjacent guide vanes are respectively fixedly connected to the inner side wall of the heating sleeve near the distillation cylinder and the outer side wall away from the distillation cylinder.

[0014] Optionally, the top of the distillation cylinder is connected to an inlet pipe and a packing pipe; the other end of the inlet pipe is connected to a desulfurization wastewater raw solution tank; the packing pipe is used to add wastewater treatment packing. The bottom end of the distillation cylinder is connected to a discharge pipe.

[0015] As described above, the scraper-recoverable evaporator of the present invention has at least the following beneficial effects: 1. This invention achieves the cleaning of crystals at the bottom of the distillation cylinder by adding a rotating mechanism, a telescopic mechanism, and a scraper mechanism inside the distillation cylinder, and retracts the scraper after cleaning. The rotating mechanism's first driving component drives the rotating sleeve to rotate axially, which in turn drives the support column to rotate axially. The support column then drives the unfolded scraper to rotate axially and clean the crystals at the bottom of the distillation cylinder. The telescopic mechanism's second driving component drives the contact platform to move towards or near the separating support platform. The contact platform causes the support column to slide back and forth along the rotating sleeve. When the support column descends, it pushes the scraper to unfold and fit against the bottom of the distillation cylinder; when it rises, the scraper retracts, reducing crystal adhesion. This application also ensures uniform heating by adding a heating sleeve and heating device fitted outside the distillation cylinder, optimizing heating efficiency, shortening distillation time, and increasing throughput.

[0016] 2. This invention achieves a sealing cover for the guide cylinder by adding a sealing cover to the bottom of the guide cylinder. The circular through hole in the sealing cover allows the support column to slide, which can effectively prevent solution or crystals from entering the guide cylinder and reduce mechanical failures caused by solution or crystals. Through a worm gear, the drive motor drives the worm, which meshes with the worm wheel to drive the rotating sleeve to rotate smoothly, reduce vibration, and improve the accuracy of the scraper movement. The worm gear and worm wheel are self-locking in reverse to prevent the scraper from rotating on its own due to gravity when the machine stops. The design of the slider groove can ensure the transmission of rotational forces between the rotating sleeve, the support column, and the scraper mechanism, and also ensure the reciprocating sliding of the support column in the rotating sleeve to realize the unfolding and retraction of the scraper.

[0017] 3. This invention designs the recovery rack as a circular shuttle shape and hinges the scraper to the recovery rack. The support column moves up and down within the guide hole inside the recovery rack, and the expansion / retraction of the scraper is controlled by a push-pull component. The fully retractable scraper reduces the risk of crystal adhesion, and the compact scraper mechanism reduces the impact on the airflow inside the distillation cylinder, thus improving adaptability.

[0018] 4. This invention increases the flow path of the heat-conducting fluid and thus the residence time by adding guide vanes inside the heating sleeve. At the same time, multiple layers of fins can be added to the guide vanes to increase the heat conduction area and improve the heat exchange efficiency. The liquid inlet pipe and packing pipe added to the top of the distillation cylinder and the discharge pipe added to the bottom can realize continuous liquid inlet, packing addition and discharge, improving production efficiency. The packing pipe can add sewage treatment packing (such as artificial zeolite, coconut shell activated carbon, glass beads, activated carbon, etc.) according to actual needs in proportion. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure inside the distillation cylinder of the present invention; Figure 3 This is a cross-sectional schematic diagram showing the cooperation of the central support platform rotation mechanism of the present invention; Figure 4 This is a schematic diagram showing the cooperation between the rotating mechanism and the telescopic mechanism of the present invention; Figure 5 This is a schematic diagram of the overall structure of the scraper mechanism of the present invention; Figure 6 This is a vertical cross-sectional view of the heating sleeve of the present invention; Figure 7 This is a cross-sectional view of the heating sleeve of the present invention in the horizontal direction.

[0020] Component designation explanation 1. Distillation cylinder; 102. Discharge pipe; 104. Liquid inlet pipe; 105. Packing pipe; 4. Heating sleeve; 401. Gas inlet pipe; 402. Gas outlet pipe; 403. Guide vane; 11. Central support; 1101. Guide cylinder; 1102. Sealing cover; 12. Rotating sleeve; 1201. First slide groove; 13. First driving component; 1301. Drive motor; 1302. Worm gear; 1301. Worm wheel; 14. Separating support platform; 15. Abutment platform; 16. Second driving component; 17. Support column; 1701. First slider; 1702. Second slider; 18. Recovery rack; 1801. Second slide groove; 19. Scraper; 20. Push-pull component. Detailed Implementation

[0021] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0022] Please see Figures 1 to 7 It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0023] The following embodiments are for illustrative purposes only. These embodiments can be combined and are not limited to the content shown in any single embodiment below.

[0024] Please see Figures 1 to 7This invention provides an evaporator with a recyclable scraper, comprising a distillation cylinder 1 and a heating sleeve 4; the distillation cylinder 1 includes a central support 11, a rotating mechanism, a telescopic mechanism, and a scraper mechanism; the central support 11 is fixedly disposed at the top of the distillation cylinder 1, and a guide cylinder 1101 coaxially arranged with the distillation cylinder 1 is fixedly connected to the bottom of the central support 11; the guide cylinder 1101 penetrates the top wall of the distillation cylinder 1 and extends downward into the interior of the distillation cylinder 1; the rotating mechanism is fixedly disposed inside the central support 11, including a rotating sleeve 12 and a first driving member 13 for driving the rotating sleeve 12 to rotate axially; the top of the rotating sleeve 12 is hinged to the top wall of the central support 11; the rotating sleeve 12 and the guide cylinder The 1101 components are coaxially arranged, with a separating support platform 14 between them; the telescopic mechanism includes a support column 17 and a second driving member 16; the support column 17 is slidably connected inside the rotating sleeve 12; the bottom end of the second driving member 16 is fixedly connected to the separating support platform 14, and the top end of the second driving member 16 is fixedly connected to an abutment platform 15; the second driving member 16 drives the support column 17 to reciprocate along the axis of the rotating sleeve 12 via the abutment platform 15 (here, the second driving member 16 can be an electric push rod, which is existing technology and will not be described in detail here); the scraper mechanism is located at the bottom end of the support column 17, and the scraper mechanism unfolds and retracts with the telescopic movement of the support column 17; the scraper mechanism includes components that are connected to the bottom wall of the distillation cylinder 1. The distillation cylinder 1 is equipped with a corresponding scraper 19 and a push-pull component 20 for driving the scraper 19 to unfold and retract; the heating sleeve 4 is sleeved on the outside of the distillation cylinder 1, and the top end of the heating sleeve 4 is connected to an air inlet pipe 401, and the bottom end of the heating sleeve 4 is connected to an air outlet pipe 402; the air inlet pipe 401 and the air outlet pipe 402 are respectively connected to an external heating device (there are many types of existing heating steam devices, such as electric heating steam generators, gas steam generators, etc., which are existing technologies and will not be described in detail here), the exhaust pipe connected to the distillation cylinder 1 and the steam in the exhaust pipe being collected by condensation and liquefaction are existing technologies and will not be described in detail or limited here. This application achieves the bottom of the distillation cylinder 1 by adding a rotating mechanism, a telescopic mechanism and a scraper mechanism inside the distillation cylinder 1. The process involves cleaning the crystals and retrieving the scraper 19 after cleaning. The first driving component 13 within the rotating mechanism drives the rotating sleeve 12 to rotate axially, which in turn drives the support column 17 to rotate axially. The support column 17 then drives the unfolded scraper 19 to rotate axially and clean the crystals at the bottom of the distillation cylinder 1. The second driving component 16 within the telescopic mechanism drives the contact platform 15 to move towards or near the separating support platform 14. The contact platform 15 drives the support column 17 to slide back and forth along the rotating sleeve 12. When the support column 17 descends, it pushes the scraper 19 to unfold and fit against the bottom of the distillation cylinder 1; when it rises, the scraper 19 retracts, reducing crystal adhesion. This application also ensures uniform heating through the addition of a heating sleeve 4 fitted onto the outside of the distillation cylinder 1 and a heating device.The heating efficiency was optimized, the distillation time was shortened, and the throughput was increased.

[0025] In this embodiment, please refer to Figures 1 to 5 The bottom end of the guide cylinder 1101 is fixedly connected to a sealing cover 1102; a circular through hole is opened in the middle of the sealing cover 1102; the support column 17 passes through the circular through hole and is used in conjunction with it; the first driving component 13 includes a drive motor 1301, a worm gear 1302 and a worm wheel 1301; the drive motor 1301 is fixedly connected inside the central support platform 11, and the output end of the drive motor 1301 can be coaxially fixed with the worm gear 1302; the worm wheel 1301 is coaxially sleeved on the outside of the rotating sleeve 12; the separating support platform 14 is an annular support platform; the outer side of the separating support platform 14 is fixedly connected to the guide cylinder 1101, and the inner side of the separating support platform 14 is hinged to the rotating sleeve 12 through a first bearing; the abutment platform 15 is annular. A contact platform 15 is provided; the outer side of the contact platform 15 is slidably connected to the guide cylinder 1101, and the inner side of the contact platform 15 is hinged to the support column 17 through a second bearing. This application achieves a sealing cover 1102 for the guide cylinder 1101 by adding a sealing cover 1102 to the bottom end of the guide cylinder 1101. The circular through hole of the sealing cover 1102 allows the support column 17 to slide, which can effectively prevent solution or crystals from entering the guide cylinder 1101 and reduce mechanical failures caused by solution or crystals. The worm gear 1302 is driven by the drive motor 1301, and the worm gear 1302 meshes with the worm wheel 1301 to drive the rotating sleeve 12 to rotate smoothly, reduce vibration, and improve the movement accuracy of the scraper 19. The worm wheel and worm gear are self-locking in reverse, which can prevent the scraper 19 from rotating on its own due to gravity when the machine stops.

[0026] In this embodiment, please refer to Figures 3 to 5The support column 17 has a first slider 1701 fixedly installed at the top of its side wall; there are multiple first sliders 1701, and the multiple first sliders 1701 are evenly distributed around the circumference of the support column 17; the inner side wall of the rotating sleeve 12 has a strip-shaped first groove 1201 along the axial direction; there are multiple first grooves 1201, and the multiple first grooves 1201 are evenly distributed around the circumference of the rotating sleeve 12; the first sliders 1701 and the first grooves 1201 are arranged correspondingly, and the first sliders 1701 and the first grooves 1201 cooperate with each other; the scraper mechanism also includes a shuttle-shaped recycling frame 18; the recycling frame 18 is arranged vertically and has a guide hole; the guide hole cooperates with the support column 17, and the bottom of the side wall of the support column 17... A second slider 1702 is fixedly provided at the end; there are multiple second sliders 1702, and the multiple second sliders 1702 are evenly distributed around the support column 17; a strip-shaped second slide groove 1801 along the axial direction is opened in the guide hole of the recycling rack 18; there are multiple second slide grooves 1801, and the multiple second slide grooves 1801 are evenly distributed around the guide hole; the second sliders 1702 and the second slide grooves 1801 are arranged correspondingly, and the second sliders 1702 and the second slide grooves 1801 are used in cooperation. The design of the slider and the slide groove can ensure the transmission of rotational force between the rotating sleeve 12, the support column 17, and the scraper mechanism, and also ensure the reciprocating sliding of the support column 17 in the rotating sleeve 12 to realize the unfolding and recycling of the scraper 19.

[0027] In this embodiment, please refer to Figure 5 The recycling rack 18 has at least two strip-shaped through slots along its axial direction; the bottom end of each strip-shaped through slot is provided with a hinge shaft; the scraper 19 is hinged to the inside of the strip-shaped through slot via the hinge shaft; one end of the push-pull member 20 is hinged to the scraper 19, and the other end of the push-pull member 20 is hinged to the bottom end of the support column 17. The bottom end of the recycling rack 18 can be hinged to a buffer member according to actual conditions. When the support column 17 extends, the recycling rack 18 moves downwards until the buffer member presses against the top of the discharge pipe 102. The support column 17 continues to extend until the second slider 1702 presses against the bottom end of the second sliding groove 1801. The push-pull member 20 drives the scraper 19 to unfold, completing the process. After crystallization and cleaning, the support column 17 retracts to the second slider 1702 and presses against the top of the second slide groove 1801. The push-pull component 20 drives the scraper 19 to retract. The support column 17 continues to retract, causing the recovery frame 18 to move upward to the initial position. This application designs the recovery frame 18 as a round shuttle shape and hinges the scraper 19 to the recovery frame 18. The support column 17 moves up and down in the guide hole inside the recovery frame 18, and the push-pull component 20 controls the expansion / retraction of the scraper 19. The fully retractable scraper 19 reduces the risk of crystal adhesion. The compact scraper mechanism structure reduces the impact on the airflow inside the distillation cylinder 1 and improves adaptability.

[0028] In this embodiment, please refer to Figure 6 and Figure 7 The heating sleeve 4 has multiple vertically arranged guide vanes 403 fixedly connected inside, and the guide vanes 403 are evenly distributed along the circumference of the heating sleeve 4; two adjacent guide vanes 403 are respectively fixedly connected to the inner side wall of the heating sleeve 4 near the distillation cylinder 1 and the outer side wall away from the distillation cylinder 1; the top of the distillation cylinder 1 is connected to an inlet pipe 104 and a packing pipe 105; the other end of the inlet pipe 104 is connected to a desulfurization wastewater raw liquid tank; the packing pipe 105 is used to add wastewater treatment packing; the bottom end of the distillation cylinder 1 is connected to a discharge pipe 102. This application increases the flow path of the heat-conducting fluid and thus the residence time by adding a guide plate 403 inside the heating sleeve 4. At the same time, multiple layers of fins can be added to the guide plate 403 to increase the heat conduction area and improve the heat exchange efficiency. The liquid inlet pipe 104 and packing pipe 105 added to the top of the distillation cylinder 1 and the discharge pipe 102 added to the bottom can realize continuous liquid inlet, packing addition and discharge, improving production efficiency. The packing pipe 105 can add sewage treatment packing (such as artificial zeolite, coconut shell activated carbon, glass beads, activated carbon, etc.) according to actual needs in proportion.

[0029] In summary, the present invention overcomes the various shortcomings of the prior art.

[0030] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. An evaporator with recyclable scraper, characterized in that: Includes distillation cylinder and heating sleeve; The distillation cylinder includes a central support, a rotating mechanism, a telescopic mechanism, and a scraper mechanism; The central support is fixedly installed at the top of the distillation cylinder, and a guide cylinder arranged coaxially with the distillation cylinder is fixedly connected to the bottom of the central support; the guide cylinder penetrates the top wall of the distillation cylinder and extends downward into the interior of the distillation cylinder. The rotating mechanism is fixedly installed inside the central support platform and includes a rotating sleeve and a first driving member for driving the rotating sleeve to rotate axially; the top end of the rotating sleeve is hinged to the top wall of the central support platform; the rotating sleeve and the guide cylinder are arranged coaxially, and a partition support platform is provided between them. The telescopic mechanism includes a support column and a second driving member; the support column is slidably connected inside the rotating sleeve; the bottom end of the second driving member is fixedly connected to the partition support platform, and the top end of the second driving member is fixedly connected to an abutment platform; the second driving member drives the support column to reciprocate along the axis of the rotating sleeve through the abutment platform. The scraper mechanism is located at the bottom end of the support column, and extends and retracts with the extension and retraction of the support column; the scraper mechanism includes a scraper adapted to the bottom wall of the distillation cylinder and a push-pull component for extending and retracting the scraper. The heating sleeve is fitted around the outside of the distillation cylinder, and the top end of the heating sleeve is connected to an air inlet pipe, while the bottom end of the heating sleeve is connected to an air outlet pipe; the air inlet pipe and the air outlet pipe are respectively connected to an external heating device.

2. The scraper-recoverable evaporator according to claim 1, characterized in that: A sealing cover is fixedly connected to the bottom end of the guide cylinder; a circular through hole is opened in the middle of the sealing cover; the circular through hole is used in conjunction with the support column.

3. The scraper-recoverable evaporator according to claim 1, characterized in that: The first driving component includes a drive motor, a worm gear, and a worm wheel; the drive motor is fixedly connected inside the central support, and the output end of the drive motor is coaxially fixed with the worm gear; the worm wheel is coaxially sleeved on the outside of the rotating sleeve.

4. The scraper-recoverable evaporator according to claim 1, characterized in that: The partition support platform is an annular support platform; the outer side of the partition support platform is fixedly connected to the guide cylinder, and the inner side of the partition support platform is hinged to the rotating sleeve through the first bearing. The abutment platform is an annular abutment platform; the outer side of the abutment platform is slidably connected to the guide cylinder, and the inner side of the abutment platform is hinged to the support column through a second bearing.

5. The scraper-recoverable evaporator according to claim 1, characterized in that: A first slider is fixedly provided at the top of the side wall of the support column; there are multiple first sliders, and the multiple first sliders are evenly distributed along the circumference of the support column; The inner wall of the rotating sleeve is provided with a strip-shaped first groove along the axial direction; there are multiple first grooves, and the multiple first grooves are evenly distributed along the circumference of the rotating sleeve; The first slider and the first slide groove are arranged correspondingly, and the first slider and the first slide groove are used in conjunction.

6. The scraper-recoverable evaporator according to claim 1, characterized in that: The scraper mechanism also includes a shuttle-shaped recycling frame; the recycling frame is arranged vertically and has a guide hole; the guide hole is used in conjunction with the support column.

7. An evaporator with recyclable scraper according to claim 6, characterized in that: A second slider is fixedly provided at the bottom end of the side wall of the support column; there are multiple second sliders, and the multiple second sliders are evenly distributed along the circumference of the support column; The recycling rack has a strip-shaped second groove in the guide hole along the axial direction; there are multiple second grooves, and the multiple second grooves are evenly distributed around the guide hole. The second slider and the second slide groove are arranged correspondingly, and the second slider and the second slide groove are used in conjunction.

8. An evaporator with recyclable scraper according to claim 6, characterized in that: The recycling rack has at least two strip-shaped through slots along its axial direction; the bottom end of each strip-shaped through slot is provided with a hinge shaft; the scraper is hinged to the inside of the strip-shaped through slot via the hinge shaft; one end of the push-pull member is hinged to the scraper, and the other end of the push-pull member is hinged to the bottom end of the support column.

9. An evaporator with recyclable scraper according to claim 1, characterized in that: The heating sleeve is fixedly connected to a plurality of vertically arranged guide vanes, which are evenly distributed along the circumference of the heating sleeve; two adjacent guide vanes are fixedly connected to the inner wall of the heating sleeve near the distillation cylinder and the outer wall of the heating sleeve away from the distillation cylinder, respectively.

10. An evaporator with recyclable scraper according to claim 1, characterized in that: The top of the distillation cylinder is connected to an inlet pipe and a packing pipe; the other end of the inlet pipe is connected to a desulfurization wastewater raw solution tank; the packing pipe is used to add wastewater treatment packing. The bottom end of the distillation cylinder is connected to a discharge pipe.

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