Sludge drying apparatus with condensate recovery

Abstract

The application relates to the technical field of sludge treatment, and provides a sludge drying device capable of recycling condensate water, which comprises a drying machine main body and a condensing tower, a condensing mechanism is rotatably arranged in the condensing tower, a plurality of heat absorption cavities are formed in the condensing mechanism and the condensing tower by being separated through partitions, each partition is provided with a communication port and an opening and closing mechanism for opening and closing the communication port; a water inlet pipeline and a drainage pipeline are connected to the side of the condensing tower, the water inlet pipeline is connected to the uppermost heat absorption cavity in communication, and the drainage pipeline is connected to the lowermost heat absorption cavity in communication; the drying machine main body is provided with a medium inlet, a medium outlet and a steam outlet, one end of the water inlet pipeline away from the condensing tower is connected to the medium outlet, one end of the drainage pipeline away from the condensing tower is connected to the medium inlet through a temperature control device; the steam outlet is connected with a steam pipeline, and the gas outlet end of the steam pipeline is connected with the condensing mechanism in communication. Based on the above, the heat energy generated in the high-temperature steam condensation and liquefaction process can be fully utilized, and the energy-saving effect is achieved.

Description

A sludge drying device with recyclable condensate. Technical Field

[0001] This application relates to the field of sludge treatment technology, and in particular to a sludge drying device that can recover condensate. Background Technology

[0002] Sludge is a flocculent body composed of water, organic particles, and inorganic particles. It contains a large amount of heavy metals, pathogens, and toxic organic matter that is difficult to degrade, and it also emits foul odors. If sludge is not effectively treated, it will seriously pollute the environment and affect human physical and mental health.

[0003] Even after thickening and dewatering, sludge typically retains a moisture content of over 70%. Further dewatering requires drying. A sludge dryer is a key piece of equipment for reducing the moisture content of sludge. It reduces the volume of sludge through physical methods, facilitating transportation, stockpiling, or further processing.

[0004] Referring to Figure 1, the existing continuous dryer includes a frame assembly 11, a dryer shell 12 fixed to the frame assembly 11, and a stirring mechanism 13 rotatably disposed inside the dryer shell 12. The stirring mechanism 13 includes a rotating cover plate 131 and a plurality of stirring blades 132 equidistantly arranged on the outer periphery of the rotating cover plate 131. A heat-conducting cover plate 14 is coaxially disposed inside the dryer shell 12, and a heating chamber 15 is formed between the heat-conducting cover plate 14 and the dryer shell 12. A medium inlet for adding heat exchange medium to the heating chamber 15 is provided on the side of the dryer shell. A drying chamber 16 is disposed between the rotating cover plate 131 and the heat-conducting cover plate 14. A feed inlet 161 for adding sludge to the drying chamber 16 and a discharge outlet 162 for allowing the dried sludge to leave the drying chamber 16 are provided on the side of the dryer shell.

[0005] Based on this, during the sludge drying operation, sludge can be added into the drying chamber 16 through the feed inlet 161. By controlling the operation of the drive component, the rotating cover plate 131 is driven to rotate. The stirring blades 132 can stir the sludge and carry it towards the discharge port 162. During this process, the heat energy of the heat exchange medium is continuously transferred to the sludge through the heat conduction cover plate 14, which can successfully dry the sludge and achieve excellent drying effect.

[0006] After entering the drying chamber 16, the sludge is agitated by the stirring blades 132, forming a spiral trajectory. Surface moisture evaporates rapidly upon contact with the high-temperature heat-conducting cover 14, forming high-temperature steam. This high-temperature steam has a complex composition, containing high concentrations of organic matter and pollutants such as ammonia nitrogen, requiring appropriate treatment to ensure compliant discharge or reuse. Referring to Figure 2, the high-temperature steam from existing sludge dryers is discharged into a condensation tower 3 via steam pipe 2. The condensation tower 3 is equipped with a spray mechanism 38, which sprays water vapor to quickly absorb the heat energy of the high-temperature steam, causing it to condense into condensate within the tower. This condensate is then purified, filtered, and recycled. However, the condensation process of the high-temperature steam in the condensation tower 3 releases a large amount of heat energy, which is not effectively utilized in current technologies, resulting in significant resource waste and requiring improvement. Summary of the Invention

[0007] Based on this, this application provides a sludge drying device that can recycle condensate, which can make full use of the heat energy generated during the high-temperature steam condensation and liquefaction process, improve resource waste, and has energy-saving effect.

[0008] The sludge drying equipment with recyclable condensate provided in this application adopts the following technical solution:

[0009] A sludge drying device with recyclable condensate includes a dryer body and a condensation tower. A condensation mechanism is rotatably installed inside the condensation tower. The condensation mechanism and the inner wall of the condensation tower are spaced apart to form a heat exchange chamber. Multiple partitions are provided inside the heat exchange chamber. Each partition has a connecting port and an opening and closing mechanism for opening and closing the connecting port. The heat exchange chamber is divided by partitions to form multiple heat absorption chambers. A water inlet pipe and a water outlet pipe are connected to the side of the condensation tower. The water inlet pipe is connected to the uppermost heat absorption chamber, and the water outlet pipe is connected to the lowermost heat absorption chamber.

[0010] The dryer body is equipped with a medium inlet, a medium outlet, and a steam outlet. The end of the water inlet pipe away from the condenser is connected to the medium outlet to deliver the heat exchange medium to the condenser. The end of the drain pipe away from the condenser is connected to the medium inlet through a temperature control device. The steam outlet is connected to a steam pipe for delivering high-temperature steam, and the steam outlet end of the steam pipe is rotatably connected to the bottom end of the condensation mechanism.

[0011] An intermittent rotating mechanism is installed at the bottom of the condensing tower, and the intermittent rotating mechanism is circumferentially linked with the condensing mechanism; each set of opening and closing mechanisms can be opened and closed sequentially from bottom to top when the intermittent rotating mechanism is activated, so as to realize the heat exchange medium in each heat absorption chamber is transferred downward layer by layer.

[0012] By adopting the above technical solution, the high-temperature steam generated by the sludge dryer of this application during continuous operation can be continuously transported to the condensation mechanism through the steam pipe section. In addition, heat exchange media such as water and heat transfer oil are required in the drying operation. Taking water as an example, the high-temperature hot water enters the heating chamber of the sludge dryer through the medium inlet and after a long period of heat release, it finally becomes cold water and is discharged from the medium outlet. The discharged cold water can be transported to the uppermost heat absorption chamber through the water inlet pipe.

[0013] It is known that after high-temperature steam enters the condensation mechanism, it will condense and release heat through liquefaction. Since the high-temperature steam enters the condensation mechanism from bottom to top, the heat energy is concentrated in the lower middle part of the condensation mechanism. Based on this, this application divides the heat exchange chamber into multiple heat absorption chambers by a partition. Each heat absorption chamber can store a limited volume of water, and the water in the lowest heat absorption chamber has the best heat absorption effect. After absorbing heat energy, the water temperature has the smallest temperature difference with the temperature set by the temperature control device. Subsequently, the hot water is transported to the temperature control device through the drain pipe. The temperature control device can heat the hot water to the preset temperature range that the sludge dryer can use with a small amount of energy, which achieves the effect of energy saving. In this process, the heat energy released by steam condensation can be fully absorbed and utilized to improve the situation of resource waste.

[0014] After the water in the bottom heat absorption chamber is delivered to the temperature control device, the intermittent rotation mechanism is controlled to force the opening and closing mechanisms of each upper partition to open in sequence, allowing the water in each heat absorption chamber to transfer downwards layer by layer. At this time, the water entering the bottom heat absorption chamber can continue to absorb heat energy, thus circulating and working in conjunction with the continuously operating sludge dryer to continuously heat the heat exchange medium.

[0015] Optionally, multiple connection ports are provided, and all connection ports are equidistantly arranged around the central axis of the partition. The opening and closing mechanism includes a hollow ring plate that is vertically slidably disposed inside the condensing tower and multiple baffles that are rotatably disposed at the bottom of the partition. The inner peripheral wall of the hollow ring plate is provided with a concave annular groove, which includes a retaining groove section, a rising groove section and a falling groove section arranged in sequence. The end of the falling groove section is connected to the retaining groove section. A guide pin is fixed to the outer peripheral wall of the condensing mechanism. The guide pin is inserted into the concave annular groove and is movably disposed within the concave annular groove.

[0016] All water baffles are equidistantly arranged around the central axis of the partition, with adjacent water baffles abutting against each other and jointly sealing the connection opening; each water baffle and the hollow ring plate are equipped with a connecting rod assembly, which can drive each water baffle to rotate synchronously through the connecting rod assembly when the hollow ring plate moves vertically, so as to change the opening and closing state of the connection opening.

[0017] By adopting the above technical solution, the condensing mechanism of this application can rotate circumferentially following the intermittent rotating mechanism. During the rotation of the condensing mechanism, if the guide pin is located in the holding groove section, the baffles can remain in contact with each other and jointly block the various connecting ports. When the guide pin rotates with the condensing mechanism and enters the rising groove section, the hollow ring plate is forced to move downward. At this time, the connecting rod assemblies can drive the baffles to rotate downward simultaneously, thereby opening the various connecting ports. Based on this, the setting of multiple connecting ports allows the water in the upper heat absorption chamber to be quickly poured into the lower heat absorption chamber, so as to complete the downward transfer of water in a single heat absorption chamber within one action time of the intermittent rotating mechanism.

[0018] Optionally, the linkage assembly includes a first link and a second link that are hinged to each other. The end of the first link is hinged to the baffle plate, and the end of the second link is hinged to the hollow ring plate. When the guide pin is located in the retaining groove section, the first link matches and abuts against the baffle plate. The first link, the second link, and the hollow ring plate together form a stable spatial support structure.

[0019] By adopting the above technical solution, when the guide pin moves within the retaining groove, the first connecting rod can match and abut against the baffle plate. At this time, since the axial movement of the hollow ring plate is restricted, the hollow ring plate, the first connecting rod and the second connecting rod can form a stable spatial triangular structure, which can effectively support each baffle plate and reduce the possibility of the baffle plate flipping downward due to the gravity of the water above.

[0020] Optionally, the condensation mechanism includes a rotating channel plate coaxially mounted on the condensation tower and a heat-conducting plate fixedly covered on the outer periphery of the rotating channel plate. The rotating channel plate is rotatably connected to the outlet end of the steam pipe, and the inner side of the rotating channel plate is connected to the inner side of the heat-conducting plate. The outer periphery of the heat-conducting plate abuts against each partition, and guide pins are fixed to the outer periphery of the heat-conducting plate. Each guide pin, which is provided in different opening and closing mechanisms, is spirally arranged along the axial direction of the heat-conducting plate.

[0021] The inner wall of the condensing tower is provided with a layered plate, which is located below all the partitions. The heat-conducting plate is rotatably installed on the layered plate. A collection cavity is formed between the layered plate and the bottom wall of the condensing tower. The bottom of the heat-conducting plate has an opening that communicates with the collection cavity. A first recovery pipeline that communicates with the collection cavity is provided on the side of the condensing tower.

[0022] By adopting the above technical solution, the high-temperature steam generated during the operation of the sludge dryer is transported to the rotating channel plate through a steam pipeline. After passing through the rotating channel plate, the high-temperature steam comes into contact with the heat-conducting plate and condenses on the inner wall of the heat-conducting plate to form condensate. The condensate drips downward under its own gravity and is collected in the collection chamber. Finally, it can be extracted through the first recovery pipeline for purification, filtration, or recycling. In addition, by arranging the guide pins spirally along the axis of the heat-conducting plate, the intermittent rotation mechanism forces the opening and closing mechanisms on each partition to open sequentially, thereby realizing the layer-by-layer downward transfer of water in the heat absorption chamber.

[0023] Optionally, multiple condensing plates are fixed inside the rotating channel plate, each condensing plate is respectively set with a corresponding partition, and each condensing plate is provided with an axial through hole; multiple condensing chambers are formed inside the rotating channel plate by the condensing plates, and each condensing chamber sidewall is provided with a steam port and a drip port, the steam port is located at the top of the condensing chamber, and the drip port is located at the bottom of the condensing chamber.

[0024] By adopting the above technical solution, when high-temperature steam enters the rotating channel plate, some of the high-temperature steam can first contact the condenser plate and liquefy. The condensate formed can flow through the drip outlet to the outer wall of the rotating channel plate and drip down into the collection chamber under its own gravity. Another part of the high-temperature steam can enter the inner side of the heat-conducting plate through the steam outlet, contact the cooler part of the inner wall of the heat-conducting plate, and liquefy. By allowing the high-temperature steam to pass through each condensation chamber, the steam can be condensed into liquid as much as possible, so as to facilitate the purification and recycling of the condensate.

[0025] Optionally, a leak-proof cover is fixedly fitted on the outer circumferential surface of the rotating channel plate, and an annular baffle is provided on the inner bottom wall of the condensing tower, with the leak-proof cover matching and abutting against the annular baffle.

[0026] By adopting the above technical solution and setting a leak-proof cover plate to abut against the ring baffle, the situation of condensate entering the condensation mechanism and the rotating connection of the condensation tower can be effectively reduced, thereby reducing the possibility of condensate leaking out of the condensation tower through the rotating gap.

[0027] Optionally, the steam pipeline includes a first pipe section connected to the steam outlet, a second pipe section connected to the condensing mechanism, and an inclined pipe section disposed between the first pipe section and the second pipe section. A storage area for storing condensate is formed between the inclined pipe section and the second pipe section, and a second recovery pipe is connected to the bottom of the storage area. The steam pipeline also includes a branch pipe section connecting the second pipe section and the inclined pipe section, and the branch pipe section is located above the storage area.

[0028] By adopting the above technical solution, when high-temperature steam enters the condensation mechanism, some of the condensate formed by condensation and liquefaction will drip down under its own gravity and be stored in the storage area between the inclined pipe section and the second pipe section. This application adds a branch pipe section between the second pipe section and the inclined pipe section. When condensate accumulates in the storage area, high-temperature steam can enter the second pipe section along the branch pipe section to achieve smooth transportation of high-temperature steam.

[0029] Optionally, the bottom of the condensing tower is provided with a support structure for support. The intermittent rotation mechanism includes a rotating seat rotatably mounted on the support structure and a drive component for driving the rotating seat to rotate intermittently. The top of the rotating seat is provided with an integrally formed limiting platform. The top surface of the limiting platform is provided with an insertion slot. The condensing mechanism is matched and inserted into the insertion slot. The inner peripheral wall of the insertion slot is provided with a baffle. The condensing mechanism is provided with a cross-sectional area that cooperates with the baffle for limiting, so as to realize the circumferential linkage between the condensing mechanism and the rotating seat.

[0030] By adopting the above technical solution, after the condensing mechanism is inserted into the insert slot, the baffle on the inner wall of the insert slot can engage with the cross-sectional area of ​​the outer periphery of the condensing mechanism. Thus, when the drive component moves to drive the rotating seat to rotate, the condensing mechanism can rotate with the rotating seat, so as to realize the sequential opening and closing of each set of opening and closing mechanisms from top to bottom.

[0031] Optionally, the drive assembly includes a rotating base plate rotatably mounted on the support structure and a drive motor fixed to the support structure. The drive motor and the rotating base plate are driven by a gear pair. The top surface of the rotating base plate is provided with a toggle post and an arc-shaped stop, both of which are eccentrically set to the rotating base plate.

[0032] The outer circumferential surface of the rotating seat is provided with multiple oblong holes at equal intervals, and the extension direction of the oblong holes is the same as the radial direction of the rotating seat; when the rotating seat rotates, the moving path of the actuating column can intersect with the opening of two adjacent oblong holes.

[0033] The outer circumference of the rotating seat is provided with multiple arc-shaped grooves at equal intervals, and each arc-shaped groove is alternately arranged with each waist-shaped hole; when the actuating column is outside the waist-shaped hole, the outer arc surface of the arc-shaped stop can match and abut against the inner wall of the arc-shaped groove.

[0034] By adopting the above technical solution, the drive motor of this application can drive the rotating base plate to rotate around its own central axis through the gear pair. During the rotation, the actuating post can enter the opening of a certain oblong hole, and as the rotating base rotates, the actuating post can abut against the inner wall of the oblong hole and force the rotating seat to rotate at a specific angle. Finally, the actuating post leaves the oblong hole again, at which point the arc-shaped stop can rotate to the arc-shaped groove and abut against the inner wall of the arc-shaped groove, thereby keeping the rotating seat stationary. Then, the arc-shaped stop leaves the arc-shaped groove, and the actuating post can re-enter the opening of another adjacent oblong hole as the rotating seat rotates, repeating this process to achieve intermittent rotation of the rotating seat.

[0035] Optionally, the bottom of the rotating seat is provided with a through hole for the steam pipe to pass through, and the through hole is connected to the insert slot; a high-temperature resistant sealing gasket is provided between the steam pipe and the inner wall of the insert slot.

[0036] By adopting the above technical solution, the sealing gasket can enhance the sealing effect between the steam pipeline and the rotating seat, reducing the possibility of high-temperature steam or condensate leaking to the outside through the rotation gap.

[0037] In summary, this application includes at least one of the following beneficial technical effects:

[0038] 1. This application divides the heat exchange chamber into multiple heat absorption chambers. When high-temperature steam enters the condensation mechanism from bottom to top, the water in the lowest heat absorption chamber has the best heat absorption effect. Subsequently, the hot water is transported to the temperature control device through the drain pipe. The temperature control device can heat the hot water to the preset temperature range that the sludge dryer can use with a small amount of energy, thus achieving the effect of energy saving.

[0039] 2. After the water in the bottom heat absorption chamber is delivered to the temperature control device, the intermittent rotation mechanism is controlled to force the opening and closing mechanisms of each upper partition to open in sequence, so that the water in each heat absorption chamber can be transferred downward layer by layer. At this time, the water entering the bottom heat absorption chamber can continue to absorb heat energy, and so on, thus working in conjunction with the continuously operating sludge dryer to continuously heat the heat exchange medium.

[0040] 3. When the condensing mechanism rotates circumferentially following the intermittent rotating mechanism, causing the guide pin to enter the rising groove section, the hollow ring plate moves downward under force. At this time, each set of connecting rod assemblies can drive each baffle plate to rotate downward simultaneously, thereby opening each connecting port. The setting of multiple connecting ports can allow the water in the upper heat absorption chamber to be quickly poured into the lower heat absorption chamber, so that the downward transfer of water in a single heat absorption chamber can be completed within one action time of the intermittent rotating mechanism. Attached Figure Description

[0041] Figure 1 is a schematic diagram of the structure of a continuous dryer in the background art;

[0042] Figure 2 is a schematic diagram of the continuous dryer and condenser tower in the background art;

[0043] Figure 3 is a schematic diagram of the overall structure of this embodiment;

[0044] Figure 4 is a schematic diagram of a half-section of the condenser tower in this embodiment;

[0045] Figure 5 is an enlarged view of point A in Figure 4;

[0046] Figure 6 is a schematic diagram of the support structure, the second pipeline and the intermittent rotation mechanism in this embodiment;

[0047] Figure 7 is an enlarged view of point B in Figure 6;

[0048] Figure 8 is a schematic diagram of the intermittent rotation mechanism in this embodiment;

[0049] Figure 9 is a schematic diagram of the opening and closing mechanism in this embodiment;

[0050] Figure 10 is a schematic diagram of the structure of the baffle and the partition in this embodiment;

[0051] Figure 11 is a structural schematic diagram of the baffle plate and connecting rod assembly in this embodiment;

[0052] Figure 12 is a schematic diagram of the heat-conducting plate in this embodiment.

[0053] Explanation of reference numerals in the attached drawings: 1. Dryer body; 11. Frame assembly; 12. Dryer shell; 13. Stirring mechanism; 131. Rotating cover plate; 132. Stirring blades; 14. Heat-conducting cover plate; 15. Heating chamber; 16. Drying chamber; 161. Feed inlet; 162. Discharge outlet; 17. Steam outlet;

[0054] 2. Steam pipeline; 21. First pipe section; 22. Second pipe section; 23. Inclined pipe section; 24. Branch pipe section; 25. Storage area; 26. Second recovery pipeline; 3. Condensation tower; 31. Layered plate; 32. Collection chamber; 321. First recovery pipeline; 33. Ring baffle; 34. Partition plate; 341. Connecting port; 35. Heat absorption chamber; 36. Water inlet pipeline; 37. Drainage pipeline; 371. Temperature control device; 38. Spraying mechanism;

[0055] 4. Condensation mechanism; 41. Rotating channel plate; 411. Mounting part; 412. Cross-sectional area; 413. Sealing gasket; 42. Heat-conducting plate; 421. Plate frame structure; 422. Heat-conducting body; 43. Condensation plate; 431. Through hole; 44. Condensation chamber; 441. Steam port; 442. Drip port; 45. Leak-proof cover plate;

[0056] 5. Opening and closing mechanism; 51. Hollow ring plate; 511. Sliding groove; 52. Water baffle; 521. Rotating shaft; 522. Sealing plate; 53. Linkage assembly; 531. First link; 532. Second link; 533. First hinge seat; 534. Second hinge seat; 54. Concave annular groove; 541. Holding groove section; 542. Rising groove section; 543. Falling groove section; 55. Guide pin;

[0057] 6. Intermittent rotation mechanism; 61. Rotating seat; 611. Through hole; 612. Limiting stage; 613. Insertion slot; 614. Stop; 615. Waist-shaped hole; 616. Arc-shaped groove; 62. Rotating base plate; 621. Actuating column; 622. Arc-shaped stop block; 63. Drive motor; 64. Gear pair; 7. Support structure. Detailed Implementation

[0058] The present application will be further described in detail below with reference to Figures 3-12.

[0059] This application discloses a sludge drying device that can recover condensate.

[0060] Referring to Figure 3, a sludge drying device with recyclable condensate includes a dryer body 1 and a condensation tower 3. The outer peripheral surface of the dryer body 1 is provided with a medium inlet, a medium outlet and a steam outlet 17. The steam outlet 17 is connected to the drying chamber 16 inside the dryer body 1. The sludge enters the drying chamber 16 for drying and dehydration, and the generated high-temperature steam can be discharged through the steam outlet 17.

[0061] The medium inlet and medium outlet are located at opposite ends of the dryer body 1, and are respectively connected to the heating chamber 15 inside the dryer body 1. During sludge drying, the high-temperature heat exchange medium is added to the heating chamber 15 through the medium inlet. The heat energy of the heat exchange medium is continuously transferred to the sludge through heat exchange, thereby drying the sludge. Then, the heat exchange medium leaves the heating chamber 15 through the medium outlet, at which point it releases a large amount of heat energy, and its temperature drops significantly. It should be noted that water is used as the heat exchange medium in this embodiment.

[0062] The condenser tower 3 is located outside the dryer body 1, and a support structure 7 is provided at the bottom of the condenser tower 3. The support structure 7 is used to support the condenser tower 3 and keep the condenser tower 3 in its erected state. Referring to Figure 4, a condensing mechanism 4 is rotatably installed inside the condenser tower 3. Specifically, the condensing mechanism 4 includes a rotating channel plate 41 and a heat-conducting plate 42. The rotating channel plate 41 is a hollow cylindrical structure, which is rotatably installed inside the condenser tower 3 and coaxially arranged with the condenser tower 3.

[0063] Referring to Figure 5, a plurality of condensing plates 43 are fixed on the inner side of the rotating channel plate 41. All condensing plates 43 are equidistantly arranged along the axial direction of the rotating channel plate 41, and each condensing plate 43 is provided with an axially penetrating through hole 431. A plurality of condensing chambers 44 are formed on the inner side of the rotating channel plate 41 by the condensing plates 43. Each condensing chamber 44 is provided with a steam port 441 and a drip port 442 on its side wall. The steam port 441 is located at the top of the condensing chamber 44, while the drip port 442 is located at the bottom of the condensing chamber 44.

[0064] The heat-conducting plate 42 is mounted on the outer periphery of the rotating channel plate 41, and the heat-conducting plate 42 and the rotating channel plate 41 are fixed together by multiple support rods. This allows the heat-conducting plate 42 and the rotating channel plate 41 to rotate together, while also maintaining a distance between them. It should be noted that the heat-conducting plate 42 includes a plate frame structure 421 and multiple heat-conducting bodies 422 embedded in the plate frame structure 421. The heat-conducting bodies 422 have good thermal conductivity, facilitating rapid heat transfer between the inner and outer sides of the heat-conducting plate 42.

[0065] A layered plate 31 is fixedly installed on the inner wall of the condensing tower 3. The layered plate 31 is close to the bottom of the condensing tower 3, and the bottom end of the heat-conducting plate 42 is rotatably embedded in the layered plate 31. A collection cavity 32 is formed between the layered plate 31 and the inner wall of the condensing tower 3. The bottom of the heat-conducting plate 42 has an opening that communicates with the collection cavity 32. The inner side of the rotating channel plate 41 is connected to the inner side of the heat-conducting plate 42 through each steam port 441 and each drip port 442.

[0066] Returning to Figure 3, the dryer body 1 and the condenser tower 3 are connected by a steam pipe 2. Referring specifically to Figure 6, the steam pipe 2 includes a first pipe section 21, a second pipe section 22, and an inclined pipe section 23. The first pipe section 21 is connected to the steam outlet 17 of the dryer body 1. The second pipe section 22 serves as the outlet of the steam pipe 2 and is connected to the bottom end of the rotating channel plate 41. The second pipe section 22 and the rotating channel plate 41 are freely rotatable. In this embodiment, the second pipe section 22 is vertically arranged, and the inclined pipe section 23 connects the first pipe section 21 and the second pipe section 22. Based on this, when high-temperature steam enters the steam pipe 2, it can travel along the first pipe section 21, the inclined pipe section 23, and the second pipe section 22, and finally enter the inner side of the rotating channel plate 41.

[0067] Referring to Figures 5 and 6, it should be noted that in this embodiment, each condenser plate 43 can be kept at a low temperature by an external cooler or other means. When high-temperature steam enters the inner side of the rotating channel plate 41 and comes into contact with the condenser plate 43, the high-temperature steam liquefies upon cooling and condenses into liquid condensate. The condensate can flow through the drip port 442 to the outer wall of the rotating channel plate 41 and drip down into the collection chamber 32 under its own gravity. In addition, some high-temperature steam enters the inner side of the heat-conducting plate 42 through the steam port 441 and comes into contact with the cooler part of the inner wall of the heat-conducting plate 42, where it can also liquefy, and the resulting condensate can also drip down into the collection chamber 32. It should be noted that, in order to completely liquefy the high-temperature steam in the condensation mechanism 4, a spray mechanism can also be added to the top of the rotating channel plate 41 in this embodiment.

[0068] Furthermore, after the high-temperature steam condenses and liquefies within the rotating channel plate 41, it may drip downwards into the steam pipe 2. By tilting the inclined pipe section 23, a storage area 25 for storing condensate can be formed between the inclined pipe section 23 and the second pipe section 22. The steam pipe 2 also includes a branch pipe section 24 connecting the second pipe section 22 and the inclined pipe section 23, located above the storage area 25. When condensate accumulates in the storage area 25, the high-temperature steam can enter the second pipe section 22 along the branch pipe section 24, thus achieving smooth delivery of the high-temperature steam.

[0069] A first recovery pipe 321 is connected to the side of the condenser tower 3, and the first recovery pipe 321 is connected to the collection chamber 32, which can discharge the condensate collected in the collection chamber 32. In addition, a second recovery pipe 26 is connected to the outside of the steam pipe 2, and the second recovery pipe 26 is connected to the bottom of the storage area 25, which can also be used to discharge the condensate collected in the storage area 25. In this embodiment, the first recovery pipe 321 and the second recovery pipe 26 eventually converge in the same pipe, so as to facilitate the unified purification, filtration and recycling of the collected condensate.

[0070] Returning to Figure 5, a leak-proof cover plate 45 is fixedly fitted on the outer circumferential surface of the rotating channel plate 41. The leak-proof cover plate 45 is located below the heat-conducting plate 42, and the leak-proof cover plate 45 and the heat-conducting plate 42 are spaced apart. A ring baffle 33 is provided protruding from the inner bottom wall of the condensing tower 3. The leak-proof cover plate 45 can match and abut against the ring baffle 33, thereby playing the role of isolating condensate water, effectively reducing the situation where condensate water enters the rotating connection between the rotating channel plate 41 and the condensing tower 3, and thus reducing the possibility of condensate water leaking to the outside of the condensing tower 3 through the rotating gap.

[0071] Returning to Figure 4, the heat-conducting plate 42 and the inner wall of the condensing tower 3 are spaced apart to form a heat exchange chamber. Multiple baffles 34 are installed inside the heat exchange chamber, each baffle 34 being located above the layered plate 31. All baffles 34 are equidistantly arranged along the axial direction of the condensing tower 3. The outer peripheral wall of the heat-conducting plate 42 can abut against each baffle 34, and each condensing plate 43 is correspondingly arranged with each baffle 34. Based on this, the heat exchange chamber is divided by the baffles 34 to form multiple heat-absorbing chambers 35, which are arranged sequentially along the height direction. Referring to Figure 5, each baffle 34 is provided with a connecting port 341 and an opening / closing mechanism 5 for opening and closing the connecting port 341. The support structure 7 below the condensing tower 3 is provided with an intermittent rotation mechanism 6, which is circumferentially linked with the condensing mechanism 4. When the intermittent rotation mechanism 6 is activated, each set of opening / closing mechanisms 5 can be opened and closed sequentially from bottom to top, so as to realize the gradual downward transfer of water inside each heat-absorbing chamber 35.

[0072] Referring to Figures 3 and 4, the side of the condenser tower 3 is connected to a water inlet pipe 36 and a drain pipe 37. The water inlet pipe 36 is connected to the uppermost heat absorption chamber 35, and the end of the water inlet pipe 36 away from the condenser tower 3 is connected to the medium outlet, which can transport the water whose temperature drops after releasing heat to the uppermost heat absorption chamber 35. The drain pipe 37 is connected to the lowermost heat absorption chamber 35, and the end of the drain pipe 37 away from the condenser tower 3 is connected to the medium inlet through a temperature control device 371. After the water absorbs heat energy and its temperature rises in each heat absorption chamber 35, the temperature control device 371 draws the water out through the drain pipe 37, measures the current water temperature in real time, and provides auxiliary heating to the water. This can heat the water to the preset temperature range that the sludge dryer can use with a small amount of energy, thus achieving an energy-saving effect.

[0073] Referring to Figure 6, the intermittent rotation mechanism 6 includes a rotating seat 61 rotatably mounted on the support structure 7 and a drive assembly for driving the rotating seat 61 to rotate intermittently. Referring to Figures 7 and 8, the rotating seat 61 is located below the condensing tower 3, and the rotating seat 61 is coaxially provided with a through hole 611, through which the second pipe section 22 of the steam pipe 2 can be rotatably inserted. The top of the rotating seat 61 is provided with an integrally formed limiting platform 612, which abuts against the bottom of the condensing tower 3. The top surface of the limiting platform 612 is provided with an insertion groove 613, which is connected to the through hole 611, and the inner peripheral wall of the insertion groove 613 is provided with a baffle 614.

[0074] Referring to Figure 8, the bottom end of the rotating channel plate 41 is provided with a mounting part 411 that is rotatably connected to the condensing tower 3. The mounting part 411 is fitted into the insertion slot 613, and the outer peripheral wall of the mounting part 411 is provided with a cross-sectional area 412. The cross-sectional area 412 can cooperate with the baffle 614 to limit the movement, so that the rotating channel plate 41 can rotate with the rotating seat 61 when it rotates, thereby realizing the circumferential linkage between the condensing mechanism 4 and the rotating seat 61. Referring to Figure 7, the bottom end of the mounting part 411 is connected to the second pipe section 22. The outer peripheral surface of the second pipe section 22 is fitted with a sealing gasket 413. The sealing gasket 413 is located inside the insertion slot 613 and abuts against the bottom surface of the mounting part 411. In this embodiment, the sealing gasket 413 is made of high-temperature resistant material, which can enhance the sealing effect between the steam pipe 2 and the rotating seat 61 and reduce the possibility of high-temperature steam or condensate leaking to the outside through the rotation gap.

[0075] Referring to Figure 8, the drive assembly includes a rotating base plate 62 rotatably mounted on the support structure 7 and a drive motor 63 fixed to the support structure 7. The drive motor 63 and the rotating base plate 62 are driven by a gear pair 64, so that the drive motor 63 can drive the rotating base plate 62 to rotate circumferentially when it is running. The structure of the gear pair 64 is a conventional choice in the art and will not be described in detail here.

[0076] A toggle post 621 is fixed on the top surface of the rotating base plate 62, and the toggle post 621 is eccentrically disposed with respect to the rotating base plate 62. A plurality of waist-shaped holes 615 are provided on the outer peripheral surface of the rotating seat 61. In this embodiment, the specific number of waist-shaped holes 615 is set to 6. All waist-shaped holes 615 are equidistantly arranged around the central axis of the rotating seat 61, and the extension direction of each waist-shaped hole 615 is the same as the radial direction of the rotating seat 61. When the rotating base plate 62 rotates circumferentially, the moving path of the toggle post 621 can intersect with the openings of two adjacent waist-shaped holes 615.

[0077] Based on this, by controlling the drive motor 63 to drive the rotating base plate 62 to rotate, the actuating post 621 can enter one of the oblong holes 615, abut against the inner wall of the oblong hole 615, and force the rotating seat 61 to rotate. After the rotating seat 61 rotates a certain angle, the actuating post 621 leaves the oblong hole 615. After the rotating base plate 62 rotates one more revolution, the actuating post 621 can enter another adjacent oblong hole 615, forcing the rotating seat 61 to rotate again, thus realizing the intermittent rotation of the rotating seat 61. It can be understood that since there are 6 oblong holes 615, the angle traveled by the rotating seat 61 in one rotation is 60°.

[0078] An arc-shaped stop 622 is fixed to the top surface of the rotating base plate 62, and the arc-shaped stop 622 is eccentrically positioned with respect to the rotating base plate 62. Multiple arc-shaped grooves 616 are formed on the outer circumferential surface of the arc-shaped stop 622, the number of which is equal to the number of oblong holes 615. Each arc-shaped groove 616 is alternately positioned with each oblong hole 615. When the rotating base plate 62 rotates and the actuating post 621 is outside the oblong hole 615, the arc-shaped stop 622 can enter the arc-shaped groove 616. At this time, the outer arc surface of the arc-shaped stop 622 can match and abut against the inner wall of the arc-shaped groove 616, thereby restricting the circumferential rotation of the rotating seat 61, so that each set of opening and closing mechanisms 5 can maintain its current opening and closing state.

[0079] Referring to Figure 9, a single partition 34 has multiple connecting ports 341, all of which are equidistantly arranged around the central axis of the partition 34. The opening and closing mechanism 5 includes a perforated ring plate 51 and a water baffle plate 52. The perforated ring plate 51 itself has a vertically penetrating perforated structure, and the outer circumferential surface of the perforated ring plate 51 has a sliding groove 511. The inner circumferential wall of the condensing tower 3 has a vertically extending sliding guide post. The sliding groove 511 can be movably engaged with the sliding guide post, allowing the perforated ring plate 51 to slide vertically within the condensing tower 3. It should be noted that the perforated ring plate 51 normally rests against the bottom of the partition 34. At this time, the opening and closing mechanism 5 can close each connecting port 341 to trap water in the heat absorption chamber 35 above the partition 34.

[0080] Referring to Figure 10, there are multiple baffles 52. Each baffle 52 has an integrally formed pivot 521 on its side edge. Each baffle 52 is rotatably mounted on the bottom of the partition 34 via the pivot 521, and all baffles 52 are equidistantly arranged around the central axis of the partition 34. Each baffle 52 includes a main component and a sealing plate 522 welded and fixed to the bottom surface of the main component. The sealing plate 522 extends to the side edge of the baffle 52 away from the pivot 521. In the initial state, the sealing plate 52 of the baffle 52 can partially abut against the bottom surface of the adjacent baffles 52, so that the adjacent baffles 52 can abut against each other, and all baffles 52 together close the connecting openings 341. Each baffle plate 52 is connected to the hollow ring plate 51 by a connecting rod assembly 53. When the hollow ring plate 51 moves vertically, the connecting rod assemblies 53 can force each baffle plate 52 to rotate synchronously, thereby changing the opening and closing state of the connecting port 341.

[0081] Referring to Figure 11, the linkage assembly 53 includes a first link 531 and a second link 532 that are hinged to each other. A first hinge seat 533 is fixed to the bottom of the sealing plate portion 522. The end of the first link 531 away from the second link 532 is hinged to the first hinge seat 533, and the rotation axis of the first link 531 and the first hinge seat 533 needs to be parallel to the central axis of the rotating shaft portion 521. Referring to Figure 9, a second hinge seat 534 is fixed to the top surface of the hollow ring plate 51. The end of the second link 532 away from the first link 531 is hinged to the second hinge seat 534, and the rotation axis of the second hinge seat 534 is also parallel to the central axis of the rotating shaft portion 521.

[0082] It should be noted that, in the initial state, the first link 531 can match and abut against the sealing plate part 522 of the baffle plate 52. The virtual connection line between the first link 531, the second link 532, and the first hinge seat 533 and the second hinge seat 534 can form a spatial triangle, thereby enabling the first link 531, the second link 532 and the hollow ring plate 51 to jointly form a stable spatial support structure to resist the gravity of the water above, so that each baffle plate 52 remains sealed at the connecting opening 341.

[0083] Returning to Figure 9, the inner peripheral wall of the hollow ring plate 51 is provided with a concave annular groove 54. The concave annular groove 54 includes a retaining groove section 541, a rising groove section 542, and a falling groove section 543 arranged in sequence. The end of the falling groove section 543 is connected to the retaining groove section 541. Referring to Figure 12, the outer peripheral wall of the heat-conducting plate 42 is fixed with a guide pin 55. The guide pin 55 is always inserted into the concave annular groove 54 and can move freely within the concave annular groove 54.

[0084] It should be noted that when the guide pin 55 is in the retaining groove section 541, the hollow ring plate 51 can remain abutting against the bottom surface of the partition plate 34. At this time, the hollow ring plate 51 is in its initial state, and the opening and closing mechanism 5 on the partition plate 34 can keep the communication port 341 closed. When the intermittent rotation mechanism 6 is activated to drive the heat conducting plate 42 to rotate circumferentially, so that the guide pin 55 enters the rising groove section 542, the hollow ring plate 51 gradually moves downward. Through each set of connecting rod assemblies 53, each baffle plate 52 can be driven to rotate downward synchronously, thereby opening each communication port 341 on the partition plate 34. The water in the heat absorption chamber 35 above the partition plate 34 can be poured into the heat absorption chamber 35 below through each communication port 341.

[0085] In addition, in this embodiment, each guide pin 55 of the different opening and closing mechanisms 5 is fixed to the outer peripheral wall of the heat-conducting plate 42, so the guide pins 55 can be arranged spirally along the axial direction of the heat-conducting plate 42. Based on this, when the intermittent rotation mechanism 6 operates and the actuating post 621 of the rotating base plate 62 enters the waist-shaped hole 615 and forces the rotating seat 61 to rotate at a specific angle, one of the guide pins 55 on the outer peripheral wall of the heat-conducting plate 42 can smoothly pass through the rising groove section 542 and the falling groove section 543. With the intermittent rotation of the rotating seat 61, the opening and closing mechanisms 5 on each partition 34 can be opened and closed in sequence to realize the layer-by-layer downward transfer of the heat exchange medium.

[0086] The implementation principle of the sludge drying equipment with recyclable condensate in this application embodiment is as follows:

[0087] During operation, the high-temperature steam generated by the sludge drying process in the dryer body 1 enters the inner side of the condensing mechanism 4 through the steam pipe 2. The high-temperature steam condenses and releases heat upon contact with the condensing plate 43 and the heat-conducting plate 42. Since the high-temperature steam enters the condensing mechanism 4 from bottom to top, the heat energy is concentrated in the lower middle part of the condensing mechanism 4. Based on this, the heat exchange chamber is divided into multiple heat absorption chambers 35. Each heat absorption chamber 35 can store a limited volume of water. The water in the lowest heat absorption chamber 35 has the best heat absorption effect. After absorbing heat energy, the water temperature has the smallest temperature difference with the temperature set by the temperature control device 371. Subsequently, the hot water is transported to the temperature control device 371 through the drain pipe 37. The temperature control device 371 can heat the hot water to the preset temperature range that the sludge dryer can use with a small amount of energy, achieving an energy-saving effect. In this process, the heat energy released by steam condensation can be fully absorbed and utilized to improve resource waste.

[0088] After the water in the lowest heat absorption chamber 35 is delivered to the temperature control device 371, the intermittent rotation mechanism 6 is controlled to open in sequence, so that the opening and closing mechanisms 5 of each upper partition 34 can be opened in sequence, allowing the water in each heat absorption chamber 35 to be transferred downward layer by layer. At this time, the water entering the lowest heat absorption chamber 35 can continue to absorb heat energy, and so on, thus working in conjunction with the continuously operating sludge dryer to continuously heat the heat exchange medium.

[0089] The above are preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A sludge drying device with recoverable condensate, comprising a dryer body (1) and a condensation tower (3), characterized in that: The condensing tower (3) is rotatably installed inside a condensing mechanism (4). The condensing mechanism (4) and the inner wall of the condensing tower (3) are spaced apart to form a heat exchange chamber. The heat exchange chamber is provided with multiple partitions (34). Each partition (34) is provided with a connecting port (341) and an opening and closing mechanism (5) for opening and closing the connecting port (341). The heat exchange chamber is divided by partitions (34) to form multiple heat absorption chambers (35). The side of the condensing tower (3) is connected to a water inlet pipe (36) and a drain pipe (37). The water inlet pipe (36) is connected to the uppermost heat absorption chamber (35), and the drain pipe (37) is connected to the lowermost heat absorption chamber (35). The dryer body (1) is provided with a medium inlet, a medium outlet, and a steam outlet. (17) The end of the water inlet pipe (36) away from the condenser (3) is connected to the medium outlet for conveying heat exchange medium to the condenser (3); the end of the drain pipe (37) away from the condenser (3) is connected to the medium inlet through a temperature control device (371); the steam outlet (17) is connected to a steam pipe (2) for conveying high-temperature steam, and the steam outlet end of the steam pipe (2) is rotatably connected to the bottom end of the condensing mechanism (4); an intermittent rotating mechanism (6) is provided below the condenser (3), and the intermittent rotating mechanism (6) and the condensing mechanism (4) are circumferentially linked; each set of opening and closing mechanisms (5) can be opened and closed sequentially from bottom to top when the intermittent rotating mechanism (6) is activated, so as to realize the heat exchange medium in each heat absorption chamber (35) is transferred downward layer by layer.

2. The sludge drying equipment according to claim 1, characterized in that: Multiple connecting ports (341) are provided, and all connecting ports (341) are equidistantly arranged around the central axis of the partition plate (34); the opening and closing mechanism (5) includes a hollow ring plate (51) vertically slidably disposed inside the condenser tower (3) and multiple baffle plates (52) rotatably disposed at the bottom of the partition plate (34), wherein the inner peripheral wall of the hollow ring plate (51) is provided with a concave annular groove (54), the concave annular groove (54) includes a retaining groove section (541), a rising groove section (542) and a descending groove section (543) arranged in sequence, and the end of the descending groove section (543) is connected to the retaining groove section (541); the condenser The outer peripheral wall of the mechanism (4) is fixed with a guide pin (55), which is inserted into the concave annular groove (54) and is movably arranged in the concave annular groove (54); all the baffles (52) are arranged equidistantly around the central axis of the partition (34), and the adjacent baffles (52) abut against each other and jointly close the communication port (341); each baffle (52) and the hollow annular plate (51) are provided with a connecting rod assembly (53), which can drive each baffle (52) to rotate synchronously through the connecting rod assembly (53) when the hollow annular plate (51) moves vertically, so as to realize the change of the opening and closing state of the communication port (341).

3. The sludge drying equipment according to claim 2, characterized in that: The connecting rod assembly (53) includes a first connecting rod (531) and a second connecting rod (532) that are hinged to each other. The end of the first connecting rod (531) is hinged to the baffle plate (52), and the end of the second connecting rod (532) is hinged to the hollow ring plate (51). When the guide pin (55) is located in the retaining groove section (541), the first connecting rod (531) abuts against the baffle plate (52). The first connecting rod (531), the second connecting rod (532) and the hollow ring plate (51) together form a stable spatial support structure.

4. The sludge drying equipment according to claim 2, characterized in that: The condensation mechanism (4) includes a rotating channel plate (41) coaxially mounted on the condensation tower (3) and a heat-conducting plate (42) fixedly covered on the outer periphery of the rotating channel plate (41). The rotating channel plate (41) is rotatably connected to the outlet end of the steam pipe (2), and the inner side of the rotating channel plate (41) is connected to the inner side of the heat-conducting plate (42). The outer periphery of the heat-conducting plate (42) abuts against each partition (34), and the guide pin (55) is fixed to the outer periphery of the heat-conducting plate (42). The guide pins of the different opening and closing mechanisms (5) are respectively arranged on each guide pin. The columns (55) are spirally arranged along the axial direction of the heat-conducting plate (42); the inner wall of the condensing tower (3) is provided with a layered plate (31), the layered plate (31) is located below all the partitions (34), and the heat-conducting plate (42) is rotatably installed on the layered plate (31); a collection cavity (32) is formed between the layered plate (31) and the inner bottom wall of the condensing tower (3), and the bottom of the heat-conducting plate (42) has an opening that communicates with the collection cavity (32); the side of the condensing tower (3) is provided with a first recovery pipeline (321) that communicates with the collection cavity (32).

5. The sludge drying equipment according to claim 4, characterized in that: The rotating channel plate (41) has multiple condensing plates (43) fixed inside. Each condensing plate (43) is respectively arranged corresponding to each partition plate (34), and each condensing plate (43) is provided with an axially penetrating through hole (431). The inner side of the rotating channel plate (41) is divided by the condensing plates (43) to form multiple condensing chambers (44). Each condensing chamber (44) has a steam port (441) and a drip port (442) on its side wall. The steam port (441) is located at the top of the condensing chamber (44), while the drip port (442) is located at the bottom of the condensing chamber (44).

6. The sludge drying equipment according to claim 4, characterized in that: The outer circumferential surface of the rotating channel plate (41) is fixedly fitted with a leak-proof cover plate (45), and the inner bottom wall of the condensing tower (3) is provided with a ring baffle (33), and the leak-proof cover plate (45) is matched and abutted against the ring baffle (33).

7. The sludge drying equipment according to claim 1, characterized in that: The steam pipeline (2) includes a first pipe section (21) connected to the steam outlet (17), a second pipe section (22) connected to the condensing mechanism (4), and an inclined pipe section (23) disposed between the first pipe section (21) and the second pipe section (22). A storage area (25) for storing condensate is formed between the inclined pipe section (23) and the second pipe section (22). A second recovery pipe (26) is connected to the bottom of the storage area (25). The steam pipeline (2) also includes a branch pipe section (24) connected between the second pipe section (22) and the inclined pipe section (23). The branch pipe section (24) is located above the storage area (25).

8. The sludge drying equipment according to claim 1, characterized in that: The bottom of the condensing tower (3) is provided with a support structure (7) for support. The intermittent rotation mechanism (6) includes a rotating seat (61) rotatably disposed on the support structure (7) and a drive component for driving the rotating seat (61) to rotate intermittently. The top of the rotating seat (61) is provided with an integrally formed limiting platform (612). The top surface of the limiting platform (612) is provided with an insertion slot (613). The condensing mechanism (4) is matched and inserted into the insertion slot (613). The inner peripheral wall of the insertion slot (613) is provided with a baffle (614). The condensing mechanism (4) is provided with a cross-sectional area (412) that cooperates with the baffle (614) for limiting, so as to realize the circumferential linkage between the condensing mechanism (4) and the rotating seat (61).

9. The sludge drying equipment according to claim 8, characterized in that: The driving assembly includes a rotating base plate (62) rotatably mounted on the support structure (7) and a drive motor (63) fixed to the support structure (7). The drive motor (63) and the rotating base plate (62) are driven by a gear pair (64). The top surface of the rotating base plate (62) is provided with a toggle post (621) and an arc-shaped stop (622). The toggle post (621) and the arc-shaped stop (622) are both eccentrically arranged with respect to the rotating base plate (62). The outer circumferential surface of the rotating seat (61) is provided with a plurality of waist-shaped holes (615) at equal intervals. The extension direction of 15) is the same as the radial direction of the rotating seat (61); when the rotating seat (61) rotates, the moving path of the actuating post (621) can intersect with the openings of two adjacent waist-shaped holes (615); the outer circumferential surface of the rotating seat (61) is provided with a plurality of arc-shaped grooves (616) at equal intervals, and each arc-shaped groove (616) and each waist-shaped hole (615) are alternately arranged; when the actuating post (621) is outside the waist-shaped hole (615), the outer arc surface of the arc-shaped stop (622) can match and abut against the inner wall of the arc-shaped groove (616).

10. The sludge drying equipment according to claim 8, characterized in that: The bottom of the rotating seat (61) is provided with a through hole (611) for the steam pipe (2) to pass through, and the through hole (611) is connected to the insert groove (613); a high-temperature resistant sealing gasket (413) is provided between the steam pipe (2) and the inner wall of the insert groove (613).

Images