Anti-scaling steam type scraper evaporator

Abstract

The invention discloses an anti-scaling steam type scraper evaporator, and belongs to the technical field of evaporators. The anti-scaling steam type scraper evaporator comprises a shell, an evaporation assembly is installed in a connecting shaft and used for smearing feed liquid on the inner wall of the shell to form a thin film to flow downwards, and the evaporation assembly is matched with a steam inlet pipe to introduce steam for heating and evaporation; when a scraper is driven to rotate through a connecting shaft, a rotating frame and a filter screen can be driven to synchronously rotate, centrifugal force is generated to perform solid-liquid separation on feed liquid, evaporated liquid is discharged after entering a liquid collecting bin, and a small amount of liquid enters a pressure bin through steam to jack up a piston so as to be extruded into a sleeve. And then the particles are conveyed to the surface of the filter screen through the spiral blades and are mixed and diluted with the feed liquid in cooperation with centrifugal force, the feed liquid is prevented from blocking the filter screen and promoting evaporation of the feed liquid, when the piston descends, the particles on the surface of the rotating frame can be sucked into the liquid collecting bin through the dirt discharging groove and then discharged along with the liquid, and the particles are prevented from being gathered in the shell and scaling is avoided.

Description

Technical Field

[0001] This invention relates to the field of evaporator technology, and in particular to a scale-resistant steam scraper evaporator. Background Technology

[0002] Evaporation is a physical process in which a liquid transforms into a gas. Generally speaking, an evaporator is an object that transforms a liquid substance into a gas. There are numerous evaporators in industry, among which those used in refrigeration systems are a common type. The evaporator is a crucial component of the four main parts of a refrigeration system. Low-temperature condensed liquid passes through the evaporator, exchanging heat with the outside air, vaporizing and absorbing heat to achieve a cooling effect. An evaporator mainly consists of two parts: a heating chamber and an evaporation chamber. The heating chamber provides the heat required for evaporation, causing the liquid to boil and vaporize; the evaporation chamber completely separates the gas and liquid phases.

[0003] Chinese patent CN112807712B, published and announced on May 2, 2023, discloses an evaporator. By setting a gas-liquid separation mechanism at the exhaust port, it is easy to remove a small amount of liquid material mixed in the gas mixture, preventing the liquid material from flowing into the subsequent reactor with the gas mixture, thus providing a strong guarantee for the normal operation of the reactor. However, when the evaporator evaporates the liquid, impurities inside the liquid may adhere to the inside of the device and form scale, which may lead to a decrease in the heat transfer efficiency of the evaporator (increased energy consumption), equipment blockage (reduced production capacity), or even corrosion and leakage. Summary of the Invention

[0004] The purpose of this invention is to provide a scale-resistant steam scraper evaporator to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a scale-resistant steam scraper evaporator, comprising a shell, a steam inlet pipe and an exhaust pipe, a motor mounted on the shell, a connecting shaft mounted on the motor and extending into the interior of the shell, and an evaporation assembly mounted inside the connecting shaft. The evaporation assembly includes a filter scraping film mechanism and a circulation mixing mechanism. The filter scraping film mechanism is used to filter the liquid and then coat it onto the inner wall of the shell to form a thin film that flows downward. The circulation mixing mechanism evaporates the liquid with steam, discharges the evaporated liquid, and evaporates the remaining liquid again.

[0006] Furthermore, the filter membrane scraping mechanism includes an injection pipe installed on the outer wall of the housing and a rotating frame installed on the outer wall of the connecting shaft. A filter screen is installed on the outer wall of the rotating frame. A rotating block is fixedly connected to one end of the injection pipe. A conical block is fixedly connected to the bottom outer wall of the rotating frame. The conical block cooperates with the inner wall of the housing to form a feeding channel. Multiple sets of scrapers are evenly distributed along the circumferential direction on the bottom outer wall of the conical block. The multiple sets of scrapers are connected to each other by connecting rings. Multiple sets of connecting rings are evenly distributed along the outer wall of the scrapers. A sleeve is fixedly connected to the inner wall of the housing, and the sleeve is rotatably connected to the connecting shaft and the rotating frame.

[0007] Furthermore, the filter membrane scraping mechanism also includes an air inlet box rotatably connected to the outer wall of the connecting shaft, and a guide block fixed to the outer wall of the bottom end of the housing, forming a flow guide groove with the bottom end of the housing. The outer wall of the air inlet box is connected to the steam inlet pipe. An air inlet channel adapted to the air inlet box is provided on the inner wall of the connecting shaft. An air inlet chamber adapted to the air inlet channel is provided on the inner wall of the top end of the sleeve. A connecting channel adapted to the air inlet chamber is provided on the inner wall of the sleeve. A steam pipe adapted to the connecting channel is provided on the outer wall of the sleeve. A notch adapted to the flow guide groove is provided on the outer wall of the guide block. Grooves are evenly distributed along the circumferential direction on the outer periphery of the rotating frame.

[0008] Furthermore, the circulating mixing mechanism includes a piston and a first mounting block, both of which are disposed inside the sleeve, dividing the internal space of the sleeve into a pressure chamber and a liquid collection chamber. The first mounting block is fixed inside the sleeve and rotatably connected to the connecting shaft. The outer wall of the liquid collection chamber is provided with a liquid inlet adapted to the guide groove, the inner wall of the outer shell is provided with a liquid outlet channel adapted to the liquid collection chamber, and the outer wall of the outer shell is provided with a liquid outlet pipe adapted to the liquid outlet channel.

[0009] Furthermore, the circulating mixing mechanism also includes a spring disposed inside the pressure chamber and adapted to the piston, a sliding sleeve dampedly connected to the inner wall of the liquid collection chamber, a first through hole adapted to the liquid outlet channel disposed on the outer wall of the sliding sleeve, an opening adapted to the liquid inlet disposed on the outer wall of the sliding sleeve, a first limiting block adapted to the piston disposed on the outer wall of the sliding sleeve, and a second limiting block adapted to the piston disposed on the outer wall of the sliding sleeve.

[0010] Furthermore, a sliding strip is damped and connected to the inner wall of the liquid collection chamber. A second through hole is provided on the outer wall of the sliding strip. A first fixing block adapted to the piston is provided on the outer wall of the sliding strip. A second fixing block adapted to the piston is provided on the outer wall of the sliding strip. Multiple sets of connecting holes are evenly distributed along the circumferential direction on the inner periphery of the first mounting block. A spring plate is fixedly connected to the outer wall of the first mounting block. A sealing plate adapted to the connecting hole is provided on the outer wall of the spring plate. A filter screen adapted to the connecting hole is provided on the bottom wall of the first mounting block. A cleaning plate adapted to the filter screen is provided on the bottom outer wall of the connecting shaft. An exhaust channel adapted to the second through hole is provided on the inner wall of the outer shell. An exhaust pipe adapted to the exhaust channel is provided on the outer wall of the outer shell.

[0011] Furthermore, the circulating mixing mechanism also includes spiral blades and a cleaning structure. The spiral blades are fixed on the outer wall of the connecting shaft. The spiral blades include a lower spiral blade and an upper spiral blade. A liquid outlet is provided on the outer wall of the top end of the sleeve. A connecting column is fixedly connected to the outer wall of the sleeve. A scraper adapted to the filter screen is provided on the outer wall of one end of the connecting column. A liquid inlet channel adapted to the liquid outlet is provided on the inner wall of the connecting column. A liquid outlet hole adapted to the liquid inlet channel is provided on the outer wall of the scraper.

[0012] Furthermore, the cleaning structure includes an arc-shaped strip on the outer wall of the sleeve, and a drain groove adapted to the sleeve is provided on the inner wall of the sleeve, with the lower opening of the drain groove located on the inner wall of the liquid collection chamber.

[0013] Furthermore, the cleaning structure also includes a second mounting block installed on the outer wall of the sleeve, a striking rod rotatably connected to the outer wall of the second mounting block, and a torsion spring adapted to the striking rod provided on the outer wall of the second mounting block.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] (1) When the scraper is driven to rotate by the connecting shaft, the rotating frame and the filter screen can rotate synchronously and generate centrifugal force to separate the solid and liquid. The evaporated liquid is discharged after entering the collection chamber. A small amount of liquid enters the pressure chamber through steam, pushes the piston and is squeezed into the inside of the sleeve. Then it is transported to the surface of the filter screen through the spiral blades and mixed and diluted with the liquid by centrifugal force to prevent the liquid from clogging the filter screen and promote the evaporation of the liquid. When the piston descends, it can suck the particles on the surface of the rotating frame into the collection chamber through the drain trough and discharge them with the liquid to prevent the particles from accumulating inside the shell and thus forming scale.

[0016] (2) The present invention causes the scraper to vibrate violently by rotating the scraper and colliding with the striking rod, thereby shaking off the particles adhering to the surface of the scraper, thus cleaning the scraper and preventing particles from adhering to the surface of the scraper and forming scale. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of the outer shell of the present invention;

[0019] Figure 3 This is a schematic diagram of the cooperative structure of the scraper and connecting ring of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure in which the conical block and the feed channel of the present invention cooperate.

[0021] Figure 5 This is a schematic diagram of the interlocking structure of the connecting channel and the steam pipe of the present invention;

[0022] Figure 6 This is a schematic diagram of the structure in which the guide block and the notch cooperate with each other in this invention;

[0023] Figure 7 This is a schematic diagram of the interlocking structure of the sleeve and the liquid inlet of the present invention;

[0024] Figure 8 This is a schematic diagram of the interlocking structure of the sleeve and the drain trough of the present invention;

[0025] Figure 9 This is a schematic diagram of the interaction between the piston and the pressure chamber in this invention;

[0026] Figure 10 This is a schematic diagram of the cooperation structure between the sliding sleeve and the first through hole of the present invention;

[0027] Figure 11 This is a schematic diagram of the spiral blade structure of the present invention;

[0028] Figure 12 This is a schematic diagram of the interlocking structure of the liquid inlet channel and the liquid outlet of the present invention;

[0029] Figure 13 This is a schematic diagram of the interaction between the striking rod and the torsion spring of the present invention;

[0030] Figure 14 This is a schematic diagram of the interaction between the injection tube and the rotating block of the present invention;

[0031] Figure 15 This is a schematic diagram of the cooperative structure of the rotating block and the rotating frame of the present invention;

[0032] Figure 16 For the present invention Figure 5 Enlarged structural diagram at point A in the middle;

[0033] Figure 17 For the present invention Figure 6 Enlarged structural diagram at point B.

[0034] In the diagram: 1. Outer shell; 2. Steam inlet pipe; 3. Exhaust pipe; 4. Motor; 5. Connecting shaft; 6. Rotating frame; 7. Filter screen; 8. Conical block; 9. Feed channel; 10. Scraper; 11. Connecting ring; 12. Sleeve; 13. Air inlet box; 14. Air inlet channel; 15. Air inlet chamber; 16. Connecting channel; 17. Steam pipe; 18. Guide block; 19. Notch; 20. Piston; 21. Pressure chamber; 22. Liquid collection chamber; 23. Spring; 24. Liquid inlet; 25. Liquid outlet channel; 26. Liquid outlet pipe; 27. First mounting block; 28. Sliding sleeve; 29. ​​First through hole; 30. Opening; 31. First limit switch 32. Second limiting block; 33. Groove; 34. Sliding strip; 35. Second through hole; 36. First fixing block; 37. Second fixing block; 38. Connecting hole; 39. Spring plate; 40. Sealing plate; 41. Filter screen; 42. Cleaning plate; 43. Exhaust channel; 44. Air outlet pipe; 45. Connecting column; 46. Spiral blade; 461. Lower spiral blade; 462. Upper spiral blade; 47. Liquid outlet; 48. Scraper; 49. Liquid inlet channel; 50. Liquid outlet hole; 51. Arc strip; 52. Sewage trough; 53. Second mounting block; 54. Striking rod; 55. Torsion spring; 56. Injection pipe; 57. Rotating block. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] Example 1

[0038] Please see Figures 1-17This invention provides a technical solution: a scale-resistant steam scraper evaporator, comprising a shell 1, a steam inlet pipe 2 and an exhaust pipe 3, a motor 4 mounted on the shell 1, a connecting shaft 5 mounted on the motor 4 and extending into the interior of the shell 1, and an evaporation assembly mounted inside the connecting shaft 5. The evaporation assembly includes a filter scraping film mechanism and a circulation mixing mechanism. The filter scraping film mechanism is used to filter the liquid and then coat it onto the inner wall of the shell 1 to form a thin film that flows downward. The circulation mixing mechanism evaporates the liquid with steam, discharges the evaporated liquid, and evaporates the remaining liquid again.

[0039] The filter membrane scraping mechanism includes a feed pipe 56 installed on the outer wall of the housing 1 and a rotating frame 6 installed on the outer wall of the connecting shaft 5. A filter screen 7 is installed on the outer wall of the rotating frame 6. A rotating block 57 is fixedly connected to one end of the feed pipe 56. A conical block 8 is fixedly connected to the bottom outer wall of the rotating frame 6. The conical block 8 cooperates with the inner wall of the housing 1 to form a feed channel 9. Multiple sets of scrapers 10 are evenly distributed along the circumferential direction on the bottom outer wall of the conical block 8. The multiple sets of scrapers 10 are connected to each other by connecting rings 11. Multiple sets of connecting rings 11 are evenly distributed along the outer wall of the scrapers 10. A sleeve 12 is fixedly connected to the inner wall of the housing 1, and the sleeve 12 is rotatably connected to the connecting shaft 5 and the rotating frame 6.

[0040] In use, first connect an external power source to start the motor 4, which drives the connecting shaft 5 to rotate. As the connecting shaft 5 rotates, it drives the filter screen 7 to rotate synchronously via the rotating frame 6. At this time, the rotating block 57 is limited by the injection pipe 56, ensuring that the rotating block 57 remains stationary while the rotating frame 6 rotates. Then, the liquid is injected into the filter screen 7 through the injection pipe 56, and the high-speed rotation of the filter screen 7, driven by the rotating frame 6, increases the centrifugal force of the liquid inside the filter screen 7. Under the action of centrifugal force, the liquid is thrown out of the rotating frame 6 and filtered through the filter screen 7 to remove particulate matter. The material is trapped inside the rotating frame 6. After being filtered, the liquid is thrown out of the filter screen 7 and splashes onto the inner wall of the outer shell 1. Under its own gravity, it slides down and passes through the feed channel 9 between the conical block 8 and the inner wall of the outer shell 1. At this time, the rotation of the rotating frame 6 will drive the conical block 8 and the scraper 10 to rotate synchronously. When the liquid passes through the feed channel 9, the rotation of the scraper 10 can evenly coat the liquid on the inner wall of the outer shell 1 and form a film. This allows the liquid to be heated evenly when it is heated and evaporated, avoiding local overheating and scaling.

[0041] The filter membrane scraping mechanism also includes an air inlet box 13 rotatably connected to the outer wall of the connecting shaft 5, and a guide block 18 fixed to the bottom outer wall of the outer shell 1, which forms a guide groove with the bottom of the outer shell 1. The outer wall of the air inlet box 13 is connected to the steam inlet pipe 2. An air inlet channel 14 adapted to the air inlet box 13 is provided on the inner wall of the connecting shaft 5. An air inlet chamber 15 adapted to the air inlet channel 14 is provided on the top inner wall of the sleeve 12. A connecting channel 16 adapted to the air inlet chamber 15 is provided on the inner wall of the sleeve 12. A steam pipe 17 adapted to the connecting channel 16 is provided on the outer wall of the sleeve 12. A notch 19 adapted to the guide groove is provided on the outer wall of the guide block 18. Grooves 33 are evenly distributed along the circumferential direction on the outer periphery of the rotating frame 6.

[0042] In use, the steam intake pipe 2 limits the intake box 13, so that the intake box 13 remains stationary when the connecting shaft 5 rotates. Steam is injected into the interior of the intake box 13 through the steam intake pipe 2, and then into the interior of the intake chamber 15 through the intake channel 14. Finally, it enters the steam pipe 17 through the connecting channel 16 and heats the interior space of the outer shell 1, causing the liquid on the inner wall of the outer shell 1 to evaporate and vaporize. The gas generated by evaporation rises inside the outer shell 1 and passes through the groove 33 on the outer periphery of the rotating frame 6 to the upper position inside the outer shell 1. Then it is discharged and collected through the exhaust pipe 3, while the evaporated liquid continues to fall downward onto the surface of the guide block 18 and passes through the notch 19 into the interior of the guide groove.

[0043] The circulating mixing mechanism includes a piston 20 and a first mounting block 27. Both the piston 20 and the first mounting block 27 are located inside the sleeve 12, dividing the internal space of the sleeve 12 into a pressure chamber 21 and a liquid collection chamber 22. The first mounting block 27 is fixed inside the sleeve 12 and rotatably connected to the connecting shaft 5. The outer wall of the liquid collection chamber 22 is provided with a liquid inlet 24 adapted to the guide groove. The inner wall of the outer shell 1 is provided with a liquid outlet channel 25 adapted to the liquid collection chamber 22. The outer wall of the outer shell 1 is provided with a liquid outlet pipe 26 adapted to the liquid outlet channel 25.

[0044] When in use, after the evaporated liquid enters the guide channel, it will gather along the surface of the guide channel towards the sleeve 12, so that the liquid can pass through the liquid inlet 24 into the inside of the liquid collection chamber 22 and fall onto the surface of the piston 20. Then the liquid enters the inside of the liquid outlet channel 25 along the surface of the piston 20, and finally is discharged through the liquid outlet pipe 26.

[0045] The circulating mixing mechanism also includes a spring 23 disposed inside the pressure chamber 21 and adapted to the piston 20. A sliding sleeve 28 is damped and connected to the inner wall of the liquid collection chamber 22. A first through hole 29 adapted to the liquid outlet channel 25 is disposed on the outer wall of the sliding sleeve 28. An opening 30 adapted to the liquid inlet 24 is disposed on the outer wall of the sliding sleeve 28. A first limiting block 31 adapted to the piston 20 is disposed on the outer wall of the sliding sleeve 28. A second limiting block 32 adapted to the piston 20 is disposed on the outer wall of the sliding sleeve 28.

[0046] In use, steam enters the pressure chamber 21 through the steam pipe 17, increasing the pressure inside the pressure chamber 21 and pushing the piston 20 upward while stretching the spring 23. When the top of the piston 20 moves upward above the liquid outlet channel 25, the evaporated liquid is intercepted by the piston 20 and enters the liquid collection chamber 22. At this time, the evaporated liquid continues to enter the liquid collection chamber 22 through the liquid inlet 24. As the piston 20 continues to rise, when the piston 20 contacts the first limiting block 31, the piston 20 will push the sliding sleeve 28 upward through the first limiting block 31, separating the opening 30 and the first through hole 29 from the liquid inlet 24 and the liquid outlet channel 25. At this time, the evaporated liquid cannot enter the liquid collection chamber 22 through the liquid inlet 24.

[0047] The inner wall of the liquid collection chamber 22 is damped by a sliding strip 34. The outer wall of the sliding strip 34 is provided with a second through hole 35. The outer wall of the sliding strip 34 is provided with a first fixing block 36 adapted to the piston 20. The outer wall of the sliding strip 34 is provided with a second fixing block 37 adapted to the piston 20. The inner periphery of the first mounting block 27 is provided with multiple sets of connecting holes 38 evenly distributed along the circumferential direction. The outer wall of the first mounting block 27 is fixedly connected with a spring plate 39. The outer wall of the spring plate 39 is provided with a sealing plate 40 adapted to the connecting hole 38. The bottom wall of the first mounting block 27 is provided with a filter screen 41 adapted to the connecting hole 38. The bottom outer wall of the connecting shaft 5 is provided with a cleaning plate 42 adapted to the filter screen 41. The inner wall of the outer shell 1 is provided with an exhaust channel 43 adapted to the second through hole 35. The outer wall of the outer shell 1 is provided with an exhaust pipe 44 adapted to the exhaust channel 43.

[0048] During use, as the pressure inside the pressure chamber 21 continues to increase, the piston 20 continues to rise, thereby pushing the liquid inside the collection chamber 22 to squeeze the surface of the first mounting block 27 and pass through the filter screen 41 into the interior of the connection hole 38. During this process, the evaporated liquid is filtered a second time through the filter screen 41. The liquid entering the connection hole 38 squeezes the sealing plate 40, thereby pushing the sealing plate 40 to rotate around the connection point between the spring plate 39 and the first mounting block 27, releasing the restriction on the connection hole 38, allowing the liquid to enter the position above the first mounting block 27. When the piston 20 squeezes the liquid through the connection hole 38, the piston 20 contacts the first fixing block 36, and the first fixing block 36 pushes the slide bar 34 upward, causing the second through hole 35 to move to the exhaust passage. When the steam inside the pressure chamber 21 passes through the second through hole 35 into the interior of the exhaust channel 43 and is discharged through the exhaust pipe 44, the pressure inside the pressure chamber 21 decreases. At this time, the spring 23 is pulled by the force to reset the piston 20. When the piston 20 moves down to contact the second limit block 32 and the second fixing block 37, it will push the sliding sleeve 28 and the sliding strip 34 to reset through the second limit block 32 and the second fixing block 37, and prevent the steam inside the pressure chamber 21 from entering the interior of the exhaust channel 43. At the same time, the limit on the liquid inlet 24 is released, so that the evaporated liquid continues to enter the interior of the liquid collection chamber 22 and is discharged. At the same time, the connecting shaft 5 drives the cleaning plate 42 to rotate, which can clean the surface of the filter screen 41 and prevent impurities from adhering to the surface of the filter screen 41 and causing blockage.

[0049] The circulating mixing mechanism also includes a spiral blade 46 and a cleaning structure. The spiral blade 46 is fixed on the outer wall of the connecting shaft 5. The spiral blade 46 includes a lower spiral blade 461 and an upper spiral blade 462. An outlet 47 is provided on the outer wall of the top end of the sleeve 12. A connecting column 45 is fixedly connected to the outer wall of the sleeve 12. A scraper 48 adapted to the filter screen 7 is provided on the outer wall of one end of the connecting column 45. An inlet channel 49 adapted to the outlet 47 is provided on the inner wall of the connecting column 45. An outlet hole 50 adapted to the inlet channel 49 is provided on the outer wall of the scraper 48.

[0050] In use, after the evaporated liquid enters above the first mounting block 27, it is driven by the connecting shaft 5 to rotate the spiral blades 46 inside the sleeve 12, thereby changing the flow direction of the liquid inside the sleeve 12. This causes the liquid to enter the sleeve 12 and rise upwards. During this process, as the liquid rises from the lower spiral blade 461 to the upper spiral blade 462 inside the sleeve 12, the swirling space of the liquid decreases, thus increasing the upward flow velocity of the liquid. This allows the liquid to enter the outlet 47 and flow into the inlet channel 49, finally flowing out through the outlet hole 50, causing the liquid to splash onto the filter. The surface of the filter screen 7, combined with the centrifugal force generated by the rotation of the filter screen 7, mixes and dilutes the liquid on the surface of the filter screen 7, thereby preventing the liquid from solidifying on the surface of the filter screen 7 and clogging the filter pores. At the same time, the viscosity of the diluted liquid will decrease, the flow performance will be improved, the retention layer on the heated wall will be thinned, thereby reducing the risk of scaling, and the heat transfer efficiency will be improved, the solvent evaporation rate per unit time will be increased. Meanwhile, through the rotation of the filter screen 7, the scraper 48 can scrape off the liquid on the surface of the filter screen 7, preventing the liquid from adhering to the surface of the filter screen 7 for a long time and causing scaling.

[0051] The cleaning structure includes an arc-shaped strip 51 on the outer wall of the sleeve 12, a drain trough 52 adapted to the sleeve 12 on the inner wall of the sleeve 12, and the lower opening of the drain trough 52 is located on the inner wall of the liquid collection chamber 22.

[0052] In use, the arc-shaped strip 51 is fixed to the surface of the sleeve 12 and remains stationary. The rotating frame 6 drives the filter screen 7 to rotate, causing the arc-shaped strip 51 to scrape the particles falling to the bottom of the rotating frame 6 towards the drain trough 52. As the piston 20 descends, the internal pressure of the collection chamber 22 decreases and a suction force is generated, thereby sucking the particles on the surface of the drain trough 52 into the interior of the collection chamber 22, thus completing the cleaning of the surface of the rotating frame 6. When the piston 20 rises, it pushes the sliding sleeve 28 to seal the drain trough 52, preventing air or liquid inside the collection chamber 22 from entering the drain trough 52 and being discharged into the interior of the rotating frame 6 and the filter screen 7.

[0053] The cleaning structure also includes a second mounting block 53 mounted on the outer wall of the sleeve 12. A striking rod 54 is rotatably connected to the outer wall of the second mounting block 53, and a torsion spring 55 adapted to the striking rod 54 is provided on the outer wall of the second mounting block 53.

[0054] During use, the scraper 10 will strike the striking rod 54 when it rotates. The collision between the scraper 10 and the striking rod 54 will cause the scraper 10 to vibrate violently. The vibration of the scraper 10 itself can shake off the particles adhering to the surface of the scraper 10, thereby cleaning the scraper 10 and preventing particles from adhering to the scraper 10 and forming scale. Then, as the scraper 10 continues to rotate, it pushes the striking rod 54 to rotate on the surface of the second mounting block 53 and applies torque to the torsion spring 55. When the scraper 10 and the striking rod 54 are separated, the torsion spring 55 is pushed by the force to reset the striking rod 54.

[0055] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A scale-resistant steam scraper evaporator, characterized in that, include: The outer casing (1), the steam inlet pipe (2), and the exhaust pipe (3); The motor (4) is mounted on the outer casing (1); The connecting shaft (5) is mounted on the motor (4) and extends into the interior of the housing (1); An evaporation assembly is installed inside the connecting shaft (5); The evaporation assembly includes a filter membrane scraping mechanism and a circulating mixing mechanism; The filter film scraping mechanism is used to filter the liquid and then coat it onto the inner wall of the outer shell (1) to form a thin film that flows downward. The circulating mixing mechanism evaporates the liquid material with steam, discharges the evaporated liquid, and then evaporates the remaining liquid material again.

2. The anti-scaling steam scraper evaporator according to claim 1, characterized in that: The filter scraping mechanism includes a feeding pipe (56) installed on the outer wall of the housing (1) and a rotating frame (6) installed on the outer wall of the connecting shaft (5). A filter screen (7) is installed on the outer wall of the rotating frame (6). A rotating block (57) is fixedly connected to one end of the feeding pipe (56). A conical block (8) is fixedly connected to the bottom outer wall of the rotating frame (6). The conical block (8) forms a feeding channel (9) with the inner wall of the housing (1). Multiple sets of scrapers (10) are evenly distributed along the circumferential direction on the bottom outer wall of the conical block (8). The multiple sets of scrapers (10) are connected to each other by connecting rings (11). Multiple sets of connecting rings (11) are evenly distributed along the outer wall of the scrapers (10). A sleeve (12) is fixedly connected to the inner wall of the housing (1). The sleeve (12) is rotatably connected to the connecting shaft (5) and the rotating frame (6).

3. The anti-scaling steam scraper evaporator according to claim 2, characterized in that: The filter scraping membrane mechanism also includes an air inlet box (13) rotatably connected to the outer wall of the connecting shaft (5), and a guide block (18) fixed to the bottom outer wall of the outer shell (1), which forms a guide groove with the bottom of the outer shell (1). The outer wall of the air inlet box (13) is connected to the steam inlet pipe (2). An air inlet channel (14) adapted to the air inlet box (13) is provided on the inner wall of the connecting shaft (5). An air inlet chamber (15) adapted to the air inlet channel (14) is provided on the inner wall of the top of the sleeve (12). A connecting channel (16) adapted to the air inlet chamber (15) is provided on the inner wall of the sleeve (12). A steam pipe (17) adapted to the connecting channel (16) is provided on the outer wall of the sleeve (12). A notch (19) adapted to the guide groove is provided on the outer wall of the guide block (18). Grooves (33) are evenly distributed along the circumferential direction on the outer periphery of the rotating frame (6).

4. The anti-scaling steam scraper evaporator according to claim 1, characterized in that: The circulating mixing mechanism includes a piston (20) and a first mounting block (27). Both the piston (20) and the first mounting block (27) are located inside the sleeve (12) and divide the internal space of the sleeve (12) into a pressure chamber (21) and a liquid collection chamber (22). The first mounting block (27) is fixed inside the sleeve (12) and rotatably connected to the connecting shaft (5). The outer wall of the liquid collection chamber (22) is provided with a liquid inlet (24) adapted to the guide groove. The inner wall of the outer shell (1) is provided with a liquid outlet channel (25) adapted to the liquid collection chamber (22). The outer wall of the outer shell (1) is provided with a liquid outlet pipe (26) adapted to the liquid outlet channel (25).

5. A scale-resistant steam scraper evaporator according to claim 4, characterized in that: The circulating mixing mechanism also includes a spring (23) disposed inside the pressure chamber (21) and adapted to the piston (20). A sliding sleeve (28) is damped and connected to the inner wall of the liquid collection chamber (22). A first through hole (29) adapted to the liquid outlet channel (25) is provided on the outer wall of the sliding sleeve (28). An opening (30) adapted to the liquid inlet (24) is provided on the outer wall of the sliding sleeve (28). A first limiting block (31) adapted to the piston (20) is provided on the outer wall of the sliding sleeve (28). A second limiting block (32) adapted to the piston (20) is provided on the outer wall of the sliding sleeve (28).

6. A scale-resistant steam scraper evaporator according to claim 5, characterized in that: The inner wall of the liquid collection tank (22) is damped by a slide bar (34). A second through hole (35) is provided on the outer wall of the slide bar (34). A first fixing block (36) adapted to the piston (20) is provided on the outer wall of the slide bar (34). A second fixing block (37) adapted to the piston (20) is provided on the outer wall of the slide bar (34). Multiple sets of connecting holes (38) are evenly distributed along the circumferential direction on the inner periphery of the first mounting block (27). A spring plate is fixedly connected to the outer wall of the first mounting block (27). 39), a sealing plate (40) adapted to the connecting hole (38) is provided on the outer wall of the spring sheet (39), a filter screen (41) adapted to the connecting hole (38) is provided on the bottom wall of the first mounting block (27), a cleaning plate (42) adapted to the filter screen (41) is provided on the bottom outer wall of the connecting shaft (5), an exhaust channel (43) adapted to the second through hole (35) is provided on the inner wall of the outer shell (1), and an exhaust pipe (44) adapted to the exhaust channel (43) is provided on the outer wall of the outer shell (1).

7. A scale-resistant steam scraper evaporator according to claim 4, characterized in that: The circulating mixing mechanism also includes a spiral blade (46) and a cleaning structure. The spiral blade (46) is fixed on the outer wall of the connecting shaft (5). The spiral blade (46) includes a lower spiral blade (461) and an upper spiral blade (462). A liquid outlet (47) is provided on the outer wall of the top end of the sleeve (12). A connecting column (45) is fixedly connected to the outer wall of the sleeve (12). A scraper (48) adapted to the filter screen (7) is provided on the outer wall of one end of the connecting column (45). A liquid inlet channel (49) adapted to the liquid outlet (47) is provided on the inner wall of the connecting column (45). A liquid outlet hole (50) adapted to the liquid inlet channel (49) is provided on the outer wall of the scraper (48).

8. A scale-resistant steam scraper evaporator according to claim 7, characterized in that: The cleaning structure includes an arc-shaped strip (51) on the outer wall of the sleeve (12), and a drain trough (52) adapted to the sleeve (12) is provided on the inner wall of the sleeve (12), and the lower opening of the drain trough (52) is provided on the inner wall of the liquid collection tank (22).

9. A scale-resistant steam scraper evaporator according to claim 8, characterized in that: The cleaning structure also includes a second mounting block (53) mounted on the outer wall of the sleeve (12), a striking rod (54) is rotatably connected to the outer wall of the second mounting block (53), and a torsion spring (55) adapted to the striking rod (54) is provided on the outer wall of the second mounting block (53).

Images