Low-temperature evaporator for sewage treatment

Abstract

The invention discloses a low-temperature evaporator for sewage treatment, and belongs to the field of sewage treatment.The low-temperature evaporator comprises an evaporation barrel, a vacuum pump, a gas-liquid separator and a plurality of heating pieces, the heating pieces are distributed on the inner wall of the evaporation barrel, a discharging pipe is arranged at the bottom of the evaporation barrel, and a steam outlet pipe and a sewage input pipe are arranged on the evaporation barrel; the vacuum pump is arranged beside the evaporation barrel and is communicated with the discharge pipe; a first circular ring is slidably arranged on the inner wall of the evaporation barrel, a plurality of scraping frames used for cleaning the heating pieces are fixedly connected to the circular ring, through grooves allowing the heating plates to penetrate through are formed in the first circular ring along the positions of the scraping frames, the scraping frames are slidably connected to the heating pieces, and a driving assembly for driving the first circular ring to reciprocate in the vertical direction is arranged in the evaporation barrel; a sealing assembly used for sealing the evaporation barrel is arranged in the discharging pipe, and an observation window used for observing the condition in the evaporation barrel is arranged on the side wall of the evaporation barrel. The evaporation barrel has the advantages that pollutants are prevented from being attached to the heater, and therefore the evaporation effect of the evaporation barrel is improved.

Description

Technical Field

[0001] This application relates to the technical field of sewage treatment, and particularly relates to a low-temperature evaporator for sewage treatment. Background Art

[0002] The wastewater evaporation technology is an effective method widely used in industrial and municipal sewage treatment. Its working principle is to evaporate the water in the wastewater by heating in a vacuum environment, leaving behind concentrated pollutants, thereby reducing the volume and toxicity of the wastewater. This technology is particularly suitable for treating high-concentration, toxic and harmful, and difficult-to-degrade wastewater, such as the wastewater generated in industries such as chemical engineering, pharmaceuticals, and textiles. The evaporation process can not only significantly reduce the pollution load but also recover valuable resources such as salts and metal ions through wastewater concentration and crystallization. Therefore, the wastewater evaporation technology has important application value in achieving environmental protection and resource recovery.

[0003] The low-temperature evaporator mainly includes an evaporation barrel, a vacuum pump, and a heater. An air outlet is provided at the upper end of the evaporation barrel, and a discharge port is provided at the bottom end. A conveying pipeline for inputting sewage is arranged inside the evaporation barrel, and the conveying pipeline sprays the sewage into the evaporation barrel. The vacuum pump intermittently extracts air from the evaporation barrel to ensure that the evaporation barrel is in a vacuum or low-pressure environment. The heater generally uses a tube type or a plate type to provide temperature inside the evaporation barrel, so that the water evaporates and enters other equipment through the air outlet, while the pollutants after evaporation and concentration accumulate at the bottom of the evaporation barrel and are discharged from the discharge port.

[0004] Impurities and other pollutants in the sewage inside the evaporation barrel will adhere to the heater. After a long time of adhesion, there is a possibility of adhesion and solidification on the heater, reducing the heating effect of the heater, thereby affecting the evaporation efficiency of the evaporation barrel. Summary of the Invention

[0005] In order to prevent pollutants from adhering to the heater and thus improve the evaporation effect of the evaporation barrel, this application provides a low-temperature evaporator for sewage treatment.

[0006] The low-temperature evaporator for sewage treatment provided by this application adopts the following technical solutions: A low-temperature evaporator for sewage treatment comprises an evaporation barrel, a vacuum pump, a gas-liquid separator and a plurality of heating plates, wherein the plurality of heating plates are evenly distributed on the inner side wall of the evaporation barrel, a discharge pipe is arranged at the bottom of the evaporation barrel, a steam outlet pipe and a sewage input pipe are arranged on the top side wall of the evaporation barrel, the discharge pipe is connected to the inside of the evaporation barrel, a plurality of spray holes are arranged on the side wall of one end of the sewage input pipe that penetrates into the evaporation barrel, the gas-liquid separator is slidably installed in the discharge pipe, the vacuum pump is arranged beside the evaporation barrel and is connected to the discharge pipe; a first circular ring is slidably arranged on the inner wall of the evaporation barrel, a plurality of scraping frames for cleaning the plurality of heating plates are fixedly connected to the circular ring, a through groove for the heating plate to pass through is opened on the first circular ring along the scraping frame position, the scraping frame is slidably connected to the heating plate, a driving component for driving the first circular ring to reciprocate in the vertical direction is arranged in the evaporation barrel; a sealing component for sealing the evaporation barrel is arranged in the discharge pipe, and an observation window for observing the internal situation of the evaporation barrel is arranged on the side wall of the evaporation barrel.

[0007] By adopting the above technical solution, when the evaporator is working, the driving component drives the first ring to move in the vertical direction, and the movement of the first ring drives the scraper frame thereon to move, and the scraper frame is connected to the surface of the heating plate by sliding back and forth in the vertical direction, so as to scrape the sewage on its surface to the bottom of the evaporator, thereby avoiding the adhesion of pollutants, thereby reducing the possibility of reducing the heating effect of the heating plate due to the adhesion of pollutants; when the staff observes that a lot of pollutants have accumulated at the bottom of the evaporator through the observation window, the staff releases the sealing of the evaporator by the sealing component, so that the pollutants inside are discharged from the discharge port.

[0008] Preferably, the driving assembly includes a second ring and a plurality of telescopic rods, the second ring is fixedly connected to the inner wall of the evaporation barrel, and the plurality of telescopic rods are fixedly connected between the first ring and the second ring; the telescopic rod includes a main rod and a secondary rod, one end of the main rod is fixedly connected to the second ring, a telescopic groove is provided in the main rod, a return spring is provided in the telescopic groove, the secondary rod slides in the telescopic groove and is connected to the return spring, and one end of the secondary rod away from the main rod is fixedly connected to the first ring.

[0009] By adopting the above technical solution, the air pressure in the evaporator is intermittently in a vacuum state during the intermittent exhaust of the vacuum pump. When the vacuum pump is exhausting, the air pressure in the evaporator gradually decreases, and the first ring gradually moves downward as the air pressure decreases, thereby driving the scraper frame to slide downward along the heating plate to clean its surface. The downward movement of the first ring drives the auxiliary rod to compress the return spring and move downward. When the air pressure in the evaporator gradually increases with the entry of sewage, the first ring moves upward driven by the return spring. Therefore, the first ring and the scraper frame reciprocate in the vertical direction following the exhaust frequency of the vacuum pump, thereby achieving the effect of cleaning the dirt on the surface of the heating plate.

[0010] Preferably, a connecting block is provided at the center position of the first circular ring, a connecting rod is provided between the connecting block and the first circular ring, a screw is rotatably provided in the evaporating barrel, the screw passes through and is threadedly connected to the connecting block, one end of the screw is fixedly connected to an inclined rod, the end of the inclined rod away from the screw is fixedly connected to an arc plate, and the arc plate is slidably connected to the bottom side wall of the evaporating barrel.

[0011] By adopting the above technical solution, when the first ring moves in the vertical direction, the screw can be driven to rotate through the thread, and the rotation of the screw drives the inclined rod to rotate in the evaporation barrel. The rotation of the inclined rod drives the arc plate to slide along the bottom of the evaporation barrel, thereby stirring the sewage in the evaporation barrel and continuously scraping and stirring the bottom, thereby accelerating the evaporation of water and avoiding the situation where the bottom is solidified and adhered for too long and is difficult to remove.

[0012] Preferably, the sealing assembly includes a sealing block and a rubber ring, the sealing block slides in the discharge pipe, the rubber ring is wrapped around the peripheral side wall of the sealing block, the sealing block and the gas-liquid separator are connected by a support rod, the vacuum pump is connected to the position between the sealing block and the gas-liquid separator, a release assembly for driving the sealing block to move to release the sealing state is provided at the bottom of the evaporation barrel, and the discharge pipe port is connected to an output pipe.

[0013] By adopting the above technical solution, when the evaporator is working, the gas-liquid separator is located at the connection point between the discharge pipe and the evaporator, the gas-liquid separator can prevent liquid from flowing into the discharge pipe, and the sealing block and the rubber ring can enhance the sealing degree of the discharge pipe.

[0014] Preferably, the release component includes a rotating rod, a first gear, and a motor. The motor is installed on the bottom side wall of the evaporation barrel. The rotating rod is fixedly connected to a side wall of the sealing block away from the gas-liquid separator. A sleeve block is fixedly connected to the outer wall of the bottom of the evaporation barrel. The sleeve block communicates with the discharge pipe. The output pipe is connected to the sleeve block. A fixed block is fixedly connected to the outer side wall of the sleeve block. The rotating rod passes through the fixed block. The first gear is threadedly connected to the rotating rod and rotates within the fixed block. A second gear is fixedly sleeved on the motor. The second gear meshes with the first gear. A first limiting component and a second limiting component for restricting the clockwise rotation and counterclockwise rotation of the rotating rod are respectively arranged within the fixed block. A rotating member for driving the screw rod to rotate is arranged on the rotating rod.

[0015] By adopting the above technical solution, after the evaporation barrel operates for a period of time, the staff first stops the entry of sewage. When the water in the evaporation barrel has basically evaporated, the staff starts the motor. The motor starts to drive the second gear to rotate. The rotation of the second gear drives the first gear to rotate. Under the action of the first limiting component, the first gear rotates to drive the rotating rod to move linearly upward until the sealing block is inside the evaporation barrel and disengages from the discharge pipe. At this time, the pollutants accumulated at the bottom of the evaporation barrel enter the discharge pipe and are discharged through the output pipe. Subsequently, the screw rod rotates under the action of the rotating member to accelerate the discharge of pollutants in the evaporation barrel. When the staff needs to close the discharge pipe, the motor rotates in reverse, and the rotating rod moves linearly downward under the action of the second limiting component, so that the sealing block enters the discharge pipe for sealing.

[0016] Preferably, the first limiting component includes a first limiting block and a first spring. A first limiting groove is formed within the fixed block. A first placement groove is formed on the side wall of the rotating rod. The first limiting block slides within the first placement groove. The first spring is arranged within the first placement groove, and its two ends are respectively fixedly connected to the first limiting block and the inner wall of the first placement groove. A first inclined surface is arranged on the side wall of the first limiting block, and a second inclined surface is arranged on the top. When the rotating rod rotates clockwise, the side of the first limiting block away from the first inclined surface abuts against the inner wall of the first limiting groove to restrict the rotation of the rotating rod. When the first limiting block moves to the top inner wall of the first limiting groove, the first limiting block compresses the first spring and is within the first placement groove through the second inclined surface.

[0017] By adopting the above technical solution, when the motor drives the rotating rod to rotate clockwise, the side of the first limiting block away from the first inclined surface abuts against the first limiting groove, thereby limiting the rotation of the rotating rod. At this time, the rotating rod moves vertically upward under the threaded drive of the first gear, thereby opening the sealing block. After that, the motor continues to rotate, so that the first limiting block is pushed into the first placement groove under the action of the second inclined surface. At this time, the rotating rod rotates following the drive of the motor.

[0018] Preferably, the second limiting assembly includes a second limiting block and a second spring, the fixing block is provided with a second limiting groove, the second limiting groove is located below the first limiting groove, the side wall of the rotating rod is provided with a second placement groove, the second placement groove is located below the first placement groove, the second limiting block slides in the second placement groove, the second spring is arranged in the second placement groove and its two ends are respectively fixedly connected to the second limiting block and the inner wall of the second placement groove; a third inclined surface is provided on the side wall of the second limiting block and a fourth inclined surface is provided at the bottom, the third inclined surface and the first inclined surface are in opposite directions, when the rotating rod rotates counterclockwise, the side of the second limiting block away from the third inclined surface abuts against the inner wall of the second limiting groove, thereby limiting the rotation of the rotating rod, and when the rotating rod moves downward until the second limiting block is at the bottom end of the second limiting groove, the second limiting block is pushed into the second placement groove under the action of the fourth inclined surface to compress the second spring.

[0019] By adopting the above technical solution, when the motor drives the rotating rod to rotate counterclockwise to close the discharge pipe, the second limiting block is in the second limiting groove and the side wall facing away from the second inclined surface abuts against the inner wall of the second limiting groove, thereby limiting the rotation of the rotating rod. Driven by the thread of the first gear, the rotating rod moves downward in a straight line, driving the sealing block to move into the discharge pipe and seal the discharge pipe port.

[0020] Preferably, the rotating member is an insertion rod, the insertion rod is fixedly connected to the gas-liquid separator, and a slot for inserting the insertion rod is provided at the bottom of the screw rod.

[0021] By adopting the above technical solution, when the rotating rod moves vertically into the evaporation barrel under the action of the first limiting component, the insertion rod is inserted into the slot on the screw under the push of the sealing block. When the sealing block is separated from the discharge pipe, the motor continues to rotate clockwise. At this time, the rotation of the rotating rod drives the screw to rotate, and the rotation of the screw drives the arc plate to rotate, thereby accelerating the discharge of pollutants at the bottom of the evaporation barrel to avoid excessive concentration of pollutants and poor flow.

[0022] Preferably, a fifth inclined surface is provided on the side wall of the arc-shaped plate along the extending direction of the lowest point.

[0023] By adopting the above technical solution, when discharging pollutants, the fifth inclined surface on the arc plate rotates, enabling the pollutants to flow better towards the lowest end of the evaporation barrel.

[0024] Preferably, the output pipe is Y-shaped. A sleeve block is connected to the outer bottom of the evaporation barrel. A conical block is arranged in the middle of the sleeve block. The rotating rod passes through the cone, and the output pipe communicates with the sleeve block.

[0025] By adopting the above technical solution, the conical block can guide the pollutants into the output pipe.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the evaporation barrel is working, the driving component drives the first ring to move in the vertical direction. The movement of the first ring drives the scraping frame thereon to move. The scraping frame is slidably connected to the surface of the heating sheet in a reciprocating motion in the vertical direction, thereby scraping the sewage on its surface to the bottom of the evaporation barrel, avoiding the deposition and attachment of pollutants, and thus reducing the possibility of the heating effect being reduced due to the attachment of pollutants to the heating sheet. When the staff observes through the observation window that there is a large amount of pollutants accumulated at the bottom of the evaporation barrel, the staff releases the sealing of the evaporation barrel by the sealing component, so that the pollutants therein are discharged from the discharge port. 2. The air pressure in the evaporation barrel is intermittently in a vacuum state due to the intermittent air extraction of the vacuum pump. When the vacuum pump extracts air, the air pressure in the evaporation barrel gradually decreases, and the first ring gradually moves downward following the decrease in air pressure, thereby driving the scraping frame to slide downward along the heating sheet to clean its surface. The downward movement of the first ring drives the auxiliary rod to compress the return spring and move downward. When the air pressure in the evaporation barrel gradually increases as the sewage enters, the first ring moves upward under the drive of the return spring. Therefore, the first ring and the scraping frame move in a reciprocating motion in the vertical direction following the air extraction frequency of the vacuum pump, thereby achieving the effect of cleaning the dirt on the surface of the heating sheet. 3. When the first ring moves in the vertical direction, the screw can be driven to rotate through the thread. The rotation of the screw drives the inclined rod to rotate in the evaporation barrel. The rotation of the inclined rod drives the arc plate to slide inside the bottom of the evaporation barrel, thereby being able to stir the sewage in the evaporation barrel and continuously scrape and stir the inside of its bottom, thus accelerating the evaporation of water and avoiding the situation of solidification and adhesion at the bottom due to too long precipitation, which is not easy to remove. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is an overall structural schematic diagram of a low-temperature evaporator for sewage treatment.

[0028] Figure 2 is a cross-sectional structural schematic diagram of a low-temperature evaporator for sewage treatment.

[0029] Figure 3It is a schematic structural diagram highlighting the telescopic rod in the embodiment of the present application.

[0030] Figure 4 It is a schematic structural diagram highlighting the sealing component in the embodiment of the present application.

[0031] Figure 5 It is a schematic structural diagram highlighting the release component in the embodiment of the present application.

[0032] Figure 6 It is a schematic structural diagram highlighting the first limiting component in the embodiment of the present application.

[0033] Reference numerals: 1, evaporation barrel; 2, vacuum pump; 3, gas-liquid separator; 4, heating sheet; 5, discharge pipe; 6, steam outlet pipe; 7, first ring; 8, scraping frame; 9, through groove; 10, driving component; 11, sealing component; 12, observation window; 13, second ring; 14, telescopic rod; 15, main rod; 16, sub-rod; 17, telescopic groove; 18, return spring; 19, connecting block; 20, connecting rod; 21, screw; 22, inclined rod; 23, arc plate; 24, sealing block; 25, rubber ring; 26, support rod; 27, release component; 28, output pipe; 29, rotating rod; 30, first gear; 31, motor; 32, sleeve block; 33, fixed block; 34, second gear; 35, first limiting component; 36, second limiting component; 37, insertion rod; 38, first limiting block; 39, first spring; 40, first limiting groove; 41, first placement groove; 42, first inclined surface; 43, second inclined surface; 44, second limiting block; 45, second spring; 46, second limiting groove; 47, second placement groove; 48, third inclined surface; 49, fourth inclined surface; 50, fifth inclined surface; 51, sewage input pipe; 52, spraying hole; 53, air pipe. Detailed implementation manners

[0034] The following is a further detailed description of the present application in combination with the attached Figure 1-6 This application is further described in detail below.

[0035] The embodiment of the present application discloses a low-temperature evaporator for sewage treatment, as shown in Figure 1 and Figure 2As shown in the figure, it includes an evaporation barrel 1, a vacuum pump 2, a gas-liquid separator 3, and a plurality of heating plates 4. An observation window 12 for observing the inside of the evaporation barrel 1 is provided on the side wall of the evaporation barrel 1. The plurality of heating plates 4 are evenly distributed on the inner circumferential side wall of the evaporation barrel 1. An air outlet pipe 6 and a sewage input pipe 51 are provided at the top of the evaporation barrel 1. The sewage input pipe 51 extends deep into the upper part of the evaporation barrel 1 near the middle. A plurality of spraying holes 52 for spraying sewage are opened on the circumferential side wall of the sewage input pipe 51. A discharge pipe 5 is provided at the bottom of the evaporation barrel 1, and the discharge pipe 5 communicates with the lowest end inside the evaporation barrel 1. The gas-liquid separator 3 is slidably installed in the discharge pipe 5 and is located at the connection between the evaporation barrel 1 and the discharge pipe 5 to prevent the liquid in the evaporation barrel 1 from entering the discharge pipe 5. The vacuum pump 2 is provided beside the evaporation barrel 1 and is connected to the inside of the discharge pipe 5 through an air pipe 53. The air in the evaporation barrel 1 is discharged through the gas-liquid separator 3, and the liquid is left behind.

[0036] As Figure 2 shown, a first ring 7 slides vertically along the upper inner edge of the upper end of the evaporation barrel 1. A plurality of scraping frames 8 for cleaning the heating plates 4 are fixedly welded to the lower end surface of the ring. The plurality of scraping frames 8 and the plurality of heating plates 4 are arranged in one-to-one correspondence. A through groove 9 for the heating plate to pass through is vertically opened on the first ring 7 along the position of the scraping frame 8 to prevent the first arc from restricting the moving range of the scraping frame 8. The scraping frame 8 is slidably connected to the surface of the heating plate 4 in the vertical direction. A driving assembly 10 for driving the first ring 7 to reciprocate vertically is provided inside the evaporation barrel 1; under the driving of the driving assembly 10, the first ring 7 can drive the scraping frame 8 to reciprocate on the heating plate 4, so as to clean the pollutants attached to the surface of the heating plate 4. A sealing assembly 11 for sealing the evaporation barrel 1 is provided in the discharge pipe 5, and a releasing assembly 27 for releasing the sealing effect of the sealing assembly 11 to discharge pollutants is provided at the outer bottom of the evaporation barrel 1.

[0037] As Figure 2 and Figure 3As shown, the driving assembly 10 includes a second circular ring 13 and a plurality of telescopic rods 14. The second circular ring 13 is fixedly welded to the inner wall of the peripheral side of the lower end of the evaporation barrel 1 and is located below the heating sheet 4. The plurality of telescopic rods 14 are arranged in the vertical direction, and their two ends are respectively fixedly welded to the lower end surface of the first circular ring 7 and the upper end surface of the second circular ring 13. The telescopic rod 14 includes a main rod 15 and a sub-rod 16. The main rod 15 is located below the sub-rod 16. A telescopic groove 17 is vertically formed in the upper end surface of the main rod 15. A return spring 18 is arranged in the telescopic groove 17 in the vertical direction. The bottom end of the sub-rod 16 that slides is fixedly welded to the top end of the return spring 18 and slides in the telescopic groove 17 in the vertical direction. The air pressure in the evaporation barrel 1 makes the evaporation barrel 1 intermittently in a vacuum state under the intermittent air extraction of the vacuum pump 2. When the vacuum pump 2 extracts air, the air pressure in the evaporation barrel 1 gradually decreases, and the first circular ring 7 moves downward along the inner wall of the evaporation barrel 1 following the change of air pressure, thereby driving the scraping frame 8 to slide downward along the surface of the heating sheet 4 and clean its surface. The downward movement of the first circular ring 7 drives the sub-rod 16 to compress the return spring 18 and move. When the air pressure in the evaporation barrel 1 gradually increases as the sewage enters, the first circular ring 7 moves upward under the drive of the return spring 18. Therefore, the first circular ring 7 and the scraping frame 8 reciprocate in the vertical direction following the air extraction frequency of the vacuum pump 2, so as to achieve the effect of cleaning the dirt on the surface of the heating sheet 4.

[0038] As Figure 2 and Figure 4 shown, a connecting block 19 is arranged at the central position of the first circular ring 7. The connecting block 19 is cylindrical and its axis is arranged in the vertical direction, and it is located on the axis of the evaporation barrel 1. The connecting block 19 and the first circular ring 7 are connected by three connecting rods 20. The three connecting rods 20 are evenly distributed in the first circular ring 7, and their two ends are respectively fixedly welded to the outer peripheral side wall of the connecting block 19 and the inner peripheral side wall of the first circular ring 7. A screw rod 21 is rotatably arranged in the evaporation barrel 1 along the vertical direction on its axis. The top end of the screw rod 21 is rotatably connected to the inner wall of the top of the evaporation barrel 1. The screw rod 21 passes through and is threadedly connected to the connecting block 19. The bottom end of the screw rod 21 is fixedly welded with an inclined rod 22. The inclined rod 22 is inclined. One end of the inclined rod 22 far from the screw rod 21 is fixedly welded with an arc-shaped plate 23. The arc-shaped plate 23 is slidably connected to the inner wall of the bottom of the evaporation barrel 1 by fitting the radian of the side wall of the bottom of the evaporation barrel 1. The side wall of the arc-shaped plate 23 extending along its arc is provided with a fifth inclined surface 50 that gradually decreases in width from the end far from the discharge pipe 5 to the end close to the discharge pipe 5. The fifth inclined surface 50 is convenient for pushing the pollutants on the inner wall of the bottom of the evaporation barrel 1 towards the lowest end of the evaporation barrel 1. When the vacuum pump 2 operates intermittently, the screw rod 21 rotates following the drive of the first circular ring 7. The rotation of the screw rod 21 drives the inclined rod 22 and the arc-shaped plate 23 to stir in the evaporation barrel 1, so as to accelerate the evaporation of the water in the evaporation barrel 1. At the same time, it avoids the pollutants on the inner wall of the bottom of the evaporation barrel 1 from adhering and solidifying for a long time, increasing the cleaning difficulty.

[0039] like Figure 4 and Figure 5 As shown, the sealing assembly 11 includes a sealing block 24 and a rubber ring 25, the rubber ring 25 is wrapped around the peripheral side wall of the sealing block 24, the sealing block 24 slides on the inner wall of the discharge pipe 5 in the vertical direction, and the sealing block 24 and the gas-liquid separator 3 are fixedly connected by a support rod 26, and the support rod 26 is arranged in the vertical direction. When the evaporating barrel 1 is in operation, the sealing block 24 is in the discharge pipe 5, and the gas-liquid separator 3 is at the connection between the discharge pipe 5 and the evaporating barrel 1 and prevents the liquid in the evaporating barrel 1 from entering the discharge pipe 5. The pipeline of the vacuum pump 2 is connected to the position of the discharge pipe 5 between the sealing block 24 and the gas-liquid separator 3. When the evaporating barrel 1 is in operation, the vacuum pump 2 extracts the gas from the evaporating barrel 1 through the gas-liquid separator 3. A release assembly 27 for driving the sealing block 24 to move upward to release the sealing state is arranged at the bottom of the outer side of the evaporating barrel 1, and the port of the discharge pipe 5 facing the outside is connected to the sleeve block 32, and the bottom of the sleeve block 32 is connected to the output pipe 28, and the output pipe 28 is Y-shaped. The center position inside the sleeve block 32 is a right-placed conical block, and the two ends of the Y of the output pipe 28 are respectively connected to the sleeve block 32 on both sides of the conical block.

[0040] like Figure 5 and Figure 6 As shown, the release assembly 27 includes a rotating rod 29, a first gear 30 and a motor 31. The motor 31 is fixedly mounted on the side wall of the bottom of the evaporation barrel 1. The rotating rod 29 is cylindrical and arranged in the vertical direction. The rotating rod 29 passes through the axis of the cone block and is fixedly welded to the lower end surface of the sealing block 24. A fixed block 33 is fixedly welded to the lower end surface of the sleeve block 32. A through hole is arranged in the vertical direction in the fixed block 33 for the rotating rod 29 to pass through. A first limiting assembly 35 for limiting the clockwise rotation of the rotating rod 29 and a second limiting assembly 36 for limiting the counterclockwise rotation of the rotating rod 29 are arranged in the fixed block 33. The first gear 30 is threadedly connected to the rotating rod 29 and rotates on the lower end surface of the fixed block 33. A second gear 34 is fixedly sleeved on the rotating shaft of the motor 31. The second gear 34 is meshed with the first gear 30. A rotating member for driving the screw 21 to rotate is arranged on the rotating rod 29. The rotating part is a plug rod 37, which is in the shape of a cuboid. The plug rod 37 is fixedly welded to the upper end surface of the gas-liquid separator 3 and is arranged in the vertical direction. A slot for the plug rod 37 to be inserted is provided at the bottom of the screw rod 21, and the slot is in the shape of a cuboid.

[0041] like Figure 6As shown, the first limiting component 35 is located above the second limiting component 36. The first limiting component 35 includes a first limiting block 38 and a first spring 39. A first limiting groove 40 is formed in the fixed block 33. The first limiting groove 40 is arranged in the vertical direction. A first placement groove 41 is formed in the side wall of the rotating rod 29 in the horizontal direction. The first limiting block 38 slides horizontally in the first placement groove 41. The first spring 39 is horizontally arranged in the first placement groove 41, and its two ends are respectively fixedly welded to the first limiting block 38 and the inner wall of the first placement groove 41. A first inclined surface 42 is arranged on the side wall of the first limiting block 38, and a second inclined surface 43 is arranged on the top of the first limiting block 38. The second limiting component 36 includes a second limiting block 44 and a second spring 45. A second limiting groove 46 is vertically formed in the fixed block 33. The second limiting groove 46 is located below the first limiting groove 40. A second placement groove 47 is formed in the side wall of the rotating rod 29 in the horizontal direction. The second placement groove 47 is located below the first placement groove 41. The second limiting block 44 slides horizontally in the second placement groove 47. The second spring 45 is horizontally arranged in the second placement groove 47, and its two ends are respectively fixedly welded to the second limiting block 44 and the inner wall of the second placement groove 47. A third inclined surface 48 is arranged on the side wall of the second limiting block 44, and a fourth inclined surface 49 is arranged at the bottom end of the second limiting block 44. The directions of the first inclined surface 42 and the third inclined surface 48 are opposite, and the directions of the second inclined surface 43 and the fourth inclined surface 49 are opposite.

[0042] As Figure 4 and Figure 5 shown, and in combination with Figure 6As shown, when it is necessary to remove the concentrated pollutants in the evaporation barrel 1, the staff starts the motor 31. The motor 31 starts to drive the second gear 34 to rotate. The rotation of the second gear 34 drives the first gear 30 to rotate clockwise. At this time, the first limiting block 38 is at the lower part in the first limiting groove 40 and the side wall away from the first inclined surface 42 abuts against the inner wall of the first limiting groove 40; the second limiting block 44 is below the second limiting groove 46 and is pushed by the inner wall of the through hole of the fixing block 33 into the second placement groove 47 to compress the second spring 45. At this time, the first gear 30 rotates clockwise to drive the rotating rod 29 to move vertically upward in a straight line. The upward movement of the rotating rod 29 drives the sealing block 24, the gas-liquid separator 3 and the insertion rod 37 thereon to move upward together. The diameter of the rotating rod 29 is much smaller than the diameter of the discharge pipe 5. When the sealing block 24 is separated from the discharge pipe 5, the pollutants at the bottom of the evaporation barrel 1 enter the discharge pipe 5 and are discharged through the sleeve block 32 and the output pipe 28. When the second limiting block 44 moves upward to the position of the second limiting groove 46, the second limiting block 44 is inserted into the second limiting groove 46 under the push of the second spring 45. When the first limiting block 38 moves to the top of the first limiting groove 40, the first limiting block 38 is pushed by the inner wall of the top of the first limiting groove 40 into the first placement groove 41 to compress the first spring 39 and abut against and rotate on the inner wall of the through hole in the fixing block 33. The third inclined surface 48 of the second limiting block 44 is in the clockwise direction. At this time, the rotating rod 29 rotates following the first gear 30. The rotation of the rotating rod 29 drives the insertion rod 37 to rotate. The rotation of the insertion rod 37 drives the screw rod 21 to rotate. The rotation of the screw rod 21 drives the arc plate 23 to rotate, thereby accelerating the discharge of the pollutants at the bottom of the evaporation barrel 1 and avoiding poor fluidity due to excessive concentration of the pollutants.

[0043] As Figure 4 and Figure 5 shown, and in combination with Figure 6As shown, when the pollutants in the evaporation bucket 1 are completely discharged, the motor 31 drives the rotating rod 29 to rotate counterclockwise. At this time, the first limiting block 38 rotates counterclockwise in the through hole. The second limiting block 44 rotates in the direction away from the third inclined surface 48 driven by the rotating rod. Blocked by the inner wall of the second limiting groove 46, the second limiting block 44 is blocked from rotating in the second limiting groove 46. Therefore, the driving rotating rod 29 moves vertically downward in a straight line. The downward movement of the rotating rod 29 drives the sealing block 24 and the like to move toward the discharge pipe 5, so that the insertion rod 37 disengages from the slot on the screw rod 21, and the screw rod 21 stops rotating. When the sealing block 24 moves into the discharge pipe 5 and the gas-liquid separator 3 moves to the port of the discharge pipe 5, the second limiting block 44 has moved to the bottom of the second limiting groove 46 and is gradually pushed into the second placement groove 47 under the action of the fourth inclined surface 49. At this time, the limiting rotation effect of the second limiting block 44 on the rotating rod 29 disappears. The first limiting block 38 is already within the height range of the first limiting groove 40. After the rotating rod 29 rotates and the first limiting block 38 rotates into the first limiting groove 40, the rotating rod 29 is restricted from rotating under the restriction of the first limiting block 38, and at this time the motor 31 stops.

[0044] The implementation principle of the embodiment of this application is as follows: When the evaporation bucket 1 is working, the vacuum pump 2 intermittently evacuates the inside of the evaporation bucket 1 to maintain a vacuum or low-pressure state inside it. The first ring 7 drives the plurality of scraping frames 8 to reciprocate in the vertical direction under the action of the driving assembly 10, so as to scrape off the sewage on the surface of the heating sheet 4, and avoid the deposition of pollutants on the surface of the heating sheet 4, which affects the heating effect of the heating sheet 4 on the inside of the evaporation bucket 1. When the staff observes through the observation window 12 that there is a large amount of pollutants accumulated at the bottom of the evaporation bucket 1, the staff starts the motor 31. The motor 31 drives the rotating rod 29 to rotate through the second gear 34 and the first gear 30. The rotating rod 29 moves upward in a straight line under the action of the first limiting assembly 35 until the insertion rod 37 is inserted into the slot, and after the sealing effect of the sealing assembly 11 is released, subsequently, the first limiting assembly 35 releases the restriction on the rotating rod 29, and the rotating rod 29 rotates and drives the screw rod 21 to rotate, accelerating the discharge of pollutants; when the pollutants are completely discharged, the motor 31 reverses, and the rotating rod 29 moves vertically downward in a straight line under the action of the second limiting assembly 36 until the insertion rod 37 is far away from the slot, and the sealing assembly 11 reseals the discharge pipe 5. The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A low-temperature evaporator for sewage treatment, comprising an evaporation barrel (1), a vacuum pump (2), a gas-liquid separator (3) and a plurality of heating sheets (4). The plurality of heating sheets (4) are evenly distributed on the inner side wall of the evaporation barrel (1). A discharge pipe (5) is arranged at the bottom of the evaporation barrel (1). An exhaust pipe (6) and a sewage input pipe (51) are arranged on the side wall at the top end of the evaporation barrel (1). The discharge pipe (5) communicates with the inside of the evaporation barrel (1); It is characterized in that: One end of the sewage inlet pipe (51) extending into the evaporation barrel (1) is provided with a plurality of spraying holes (52) on its side wall. The gas-liquid separator (3) is slidably installed in the discharge pipe (5), and the vacuum pump (2) is arranged beside the evaporation barrel (1) and communicated with the discharge pipe (5). A first ring (7) is slidably arranged on the inner wall of the evaporation barrel (1), and a plurality of scraping frames (8) for cleaning the plurality of heating sheets (4) are fixedly connected to the ring. A through groove (9) for the heating plate to pass through is formed on the first ring (7) along the position of the scraping frame (8). The scraping frame (8) is slidably connected to the heating sheet (4). A driving component (10) for driving the first ring (7) to reciprocate in the vertical direction is arranged in the evaporation barrel (1). A sealing component (11) for sealing the evaporation barrel (1) is arranged in the discharge pipe (5), and an observation window (12) for observing the internal situation of the evaporation barrel (1) is arranged on the side wall of the evaporation barrel (1).

2. The low-temperature evaporator for sewage treatment according to claim 1, wherein: The driving component (10) includes a second ring (13) and a plurality of telescopic rods (14). The second ring (13) is fixedly connected to the inner wall of the evaporation barrel (1), and the plurality of telescopic rods (14) are fixedly connected between the first ring (7) and the second ring (13). The telescopic rod (14) includes a main rod (15) and a sub-rod (16). One end of the main rod (15) is fixedly connected to the second ring (13). A telescopic groove (17) is formed in the main rod (15). A return spring (18) is arranged in the telescopic groove (17). The sub-rod (16) slides in the telescopic groove (17) and is connected to the return spring (18). The end of the sub-rod (16) away from the main rod (15) is fixedly connected to the first ring (7).

3. The low-temperature evaporator for sewage treatment according to claim 1, characterized in that: A connecting block (19) is arranged at the central position of the first ring (7). A connecting rod (20) is arranged between the connecting block (19) and the first ring (7). A screw rod (21) is rotatably arranged in the evaporation barrel (1). The screw rod (21) passes through and is threadedly connected to the connecting block (19). One end of the screw rod (21) is fixedly connected to an inclined rod (22). The end of the inclined rod (22) away from the screw rod (21) is fixedly connected to an arc-shaped plate (23). The arc-shaped plate (23) is slidably connected to the bottom side wall of the evaporation barrel (1).

4. A low-temperature evaporator for sewage treatment according to claim 3, characterized in that: The sealing component (11) includes a sealing block (24) and a rubber ring (25). The sealing block (24) slides in the discharge pipe (5). The rubber ring (25) is wrapped around the peripheral side wall of the sealing block (24). The sealing block (24) and the gas-liquid separator (3) are connected by a support rod (26). The vacuum pump (2) is communicated with the position between the sealing block (24) and the gas-liquid separator (3). A release component (27) for driving the sealing block (24) to move to release the sealed state is arranged at the bottom of the evaporation barrel (1). The port of the discharge pipe (5) is communicated with an output pipe (28).

5. The low-temperature evaporator for sewage treatment according to claim 4, wherein: The release component (27) includes a rotating rod (29), a first gear (30), and a motor (31). The motor (31) is installed on the bottom side wall of the evaporation barrel (1). The rotating rod (29) is fixedly connected to a side wall of the sealing block (24) away from the gas-liquid separator (3). A sleeve block (32) is fixedly connected to the outer bottom wall of the evaporation barrel (1). The sleeve block (32) communicates with the discharge pipe (5). The output pipe (28) is connected to the sleeve block (32). A fixing block (33) is fixedly connected to the outer side wall of the sleeve block (32). The rotating rod (29) passes through the fixing block (33). The first gear (30) is threadedly connected to the rotating rod (29) and rotates in the fixing block (33). A second gear (34) is fixedly sleeved on the motor (31). The second gear (34) meshes with the first gear (30). A first limiting component (35) and a second limiting component (36) for restricting the clockwise rotation and counterclockwise rotation of the rotating rod (29) are respectively arranged in the fixing block (33). A rotating member for driving the screw rod (21) to rotate is arranged on the rotating rod (29).

6. The low-temperature evaporator for sewage treatment according to claim 5, wherein: The first limiting component (35) includes a first limiting block (38) and a first spring (39). A first limiting groove (40) is formed in the fixing block (33). A first placement groove (41) is formed in the side wall of the rotating rod (29). The first limiting block (38) slides in the first placement groove (41). The first spring (39) is arranged in the first placement groove (41), and its two ends are respectively fixedly connected to the first limiting block (38) and the inner wall of the first placement groove (41). A first inclined surface (42) is arranged on the side wall of the first limiting block (38), and a second inclined surface (43) is arranged on the top of the first limiting block (38). When the rotating rod (29) rotates clockwise, the side of the first limiting block (38) away from the first inclined surface (42) abuts against the inner wall of the first limiting groove (40) to restrict the rotation of the rotating rod (29). When the first limiting block (38) moves to the top inner wall of the first limiting groove (40), the first limiting block (38) compresses the first spring (39) and is located in the first placement groove (41) through the second inclined surface (43).

7. A low-temperature evaporator for sewage treatment according to claim 6, characterized in that: The second limiting component (36) includes a second limiting block (44) and a second spring (45). A second limiting groove (46) is formed in the fixed block (33). The second limiting groove (46) is located below the first limiting groove (40). A second placement groove (47) is formed in the side wall of the rotating rod (29). The second placement groove (47) is located below the first placement groove (41). The second limiting block (44) slides in the second placement groove (47). The second spring (45) is arranged in the second placement groove (47), and its two ends are respectively fixedly connected to the second limiting block (44) and the inner wall of the second placement groove (47). A third inclined surface (48) is arranged on the side wall of the second limiting block (44), and a fourth inclined surface (49) is arranged at the bottom. The direction of the third inclined surface (48) is opposite to that of the first inclined surface (42). When the rotating rod (29) rotates counterclockwise, the side of the second limiting block (44) away from the third inclined surface (48) abuts against the inner wall of the second limiting groove (46), thereby restricting the rotation of the rotating rod (29). When the rotating rod (29) moves downward until the second limiting block (44) is at the bottom end of the second limiting groove (46), the second limiting block (44) is pushed into the second placement groove (47) under the action of the fourth inclined surface (49) to compress the second spring (45).

8. A low-temperature evaporator for sewage treatment according to claim 5, characterized in that: The rotating member is a plug rod (37). The plug rod (37) is fixedly connected to the gas-liquid separator (3). A slot for inserting the plug rod (37) is formed at the bottom of the screw rod (21).

9. A low-temperature evaporator for sewage treatment according to claim 3, characterized in that: A fifth inclined surface (50) is formed on the side wall of the arc-shaped plate (23) along the extending direction of the lowest point.

10. A low-temperature evaporator for sewage treatment according to claim 5, characterized in that: The output pipe (28) is in a Y shape. A sleeve block (32) is connected to the outer bottom of the evaporation barrel (1). A conical block is arranged in the middle of the sleeve block (32). The rotating rod (29) passes through the cone. The output pipe (28) communicates with the sleeve block (32).

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