Membrane softening and hardness reducing device for high-salinity wastewater

Abstract

The invention provides a high-salinity wastewater membrane softening and hardness reducing device, and relates to the technical field of wastewater treatment.The high-salinity wastewater membrane softening and hardness reducing device comprises a water feeding platform, a water inlet pipe is fixed to the top of the outermost end of the water feeding platform, four sets of evaporation boxes are fixed to the other end of the water feeding platform at equal intervals, and evaporation plates are rotationally installed in the evaporation boxes through bearings; the water feeding platform is communicated with the top, located on the evaporation plate, of the evaporation box through a pipeline, the position, located at the bottom of the evaporation plate, of the evaporation box is provided with a push-out assembly, the push-out assembly comprises an upper scraper blade and a lower scraper blade, and the upper scraper blade and the lower scraper blade are embedded in the inner wall of the side, close to the water feeding platform, of the evaporation box. The multiple sets of evaporation boxes and the vertical pipes are connected with the tubular membrane assembly, waste water is evaporated and crystallized separately, efficiency is improved, generated water vapor is filtered by the tubular membrane assembly, the bottoms of the evaporation boxes and the interiors of the vertical pipes can be cleaned in time through the push-out assembly and the cleaning assembly, sediment is discharged, and the waste water treatment efficiency is prevented from being affected.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and specifically to a device for softening and reducing the hardness of high-salt wastewater by means of a membrane. Background Art

[0002] Regarding the treatment method for the hardness in high-salt and high-hardness wastewater, currently, the double-alkali method is mainly used to convert the permanent hardness into temporary hardness, and then calcium carbonate is recovered through crystallization precipitation, or the ion exchange method is directly used to remove the hardness. However, the above methods are restricted in the popularization and application of the technology due to problems such as high operating costs. The remaining high-salt wastewater after hardness removal can recover sodium sulfate or sodium carbonate through the evaporation crystallization method, and among them, the membrane distillation technology has received extensive attention. Membrane distillation is the coupling of membrane separation and traditional distillation processes, with characteristics such as low operating temperature and pressure, and almost complete retention of non-volatile compounds. When heating, the requirements for the heat source are not high, and low-temperature flue gas waste heat in the factory, high-temperature condensate water, etc. can be selected. It can also be combined with solar energy, geothermal energy, or low-grade heat sources.

[0003] In the prior art, the combination of evaporation and tubular membranes can improve the efficiency of wastewater softening and hardness reduction. However, in the wastewater and evaporation water vapor transmission pipelines, scale is likely to be generated due to the high-salt components, which will long-term affect the passing efficiency of the wastewater and the overall system, and will also cause certain damage to the tubular membranes. It is relatively inconvenient to clean the interior of the pipelines. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a device for softening and reducing the hardness of high-salt wastewater by means of a membrane to solve the problems raised in the above background art. The structure of the present invention is novel. The waste water is separated for evaporation crystallization by connecting multiple evaporation tanks and vertical pipes to the tubular membrane module, improving the efficiency. The generated water vapor is filtered by the tubular membrane module. Through the pushing component and the cleaning component, the bottom of the evaporation tank and the interior of the vertical pipe can be cleaned in a timely manner, and the precipitate is discharged to avoid affecting the wastewater treatment efficiency.

[0005] To achieve the above object, the present invention is realized through the following technical solutions: A high-salt wastewater membrane softening and hardness reduction device includes a water supply platform. At the top of the outermost end of the water supply platform, a water inlet pipe is fixed. At the other end of the water supply platform, four evaporation tanks are equidistantly fixed. Inside the evaporation tank, an evaporation plate is rotatably installed through a bearing. The water supply platform is communicated with the evaporation tank at the top of the evaporation plate through a pipeline. At the position of the evaporation tank at the bottom of the evaporation plate, a pushing component is provided. The pushing component includes an upper scraper and a lower scraper. Both the upper scraper and the lower scraper are embedded in the inner wall of the evaporation tank close to the water supply platform side, and the lower scraper is located at the bottom of the first scraper. The top of the upper scraper is on the same straight line as the bottom surface of the evaporation plate. At the bottom of the other side of the evaporation tank, a slag discharge port is opened, and a sealing plate is slidably inserted inside the slag discharge port. At the outer end of the evaporation tank on one side of the slag discharge port, a heating device is provided. A connecting layer is fixed between adjacent evaporation tanks. An air inlet and outlet pipe is installed between the heating device and the connecting layer. A vertical pipe is fixed at the top of the evaporation tank, and at one side of the top of the vertical pipe, a tubular membrane module is fixedly installed. The tubular membrane module is fixed on the top of the heating device. At the top of the vertical pipe, a cleaning component is provided. The cleaning component includes a conical baffle. The bottom of the conical baffle is a circular plate, and the top of the conical baffle is a cone, and the conical baffle slides along the inside of the vertical pipe.

[0006] Further, a circular heat exchange pipe is fixed at the bottom of the evaporation plate of the evaporation tank, and the other end of the circular heat exchange pipe is installed inside the water supply platform. At one side of the bottom of the evaporation plate of the evaporation tank, a return pipe is fixed, and the other end of the return pipe is communicated with the water supply platform.

[0007] Further, a pressure relief valve is fixed at one side of the top of the evaporation tank. Rubber strips are fixed on both sides of the evaporation plate. The shaft of the evaporation plate passes through the evaporation tank. A transmission belt is sleeved on the surface of the shafts passing through adjacent evaporation tanks. A first motor is fixed on the outer wall of the heating device, and the output end of the first motor is fixedly connected to the driving wheel of the transmission belt.

[0008] Further, a horizontal plate is fixed on the outer side of the sealing plate. A first electric push rod is fixed on the outer wall of the evaporation tank, and the extending end of the first electric push rod is fixedly connected to the horizontal plate. A collection tank is fixed between the slag discharge port of the evaporation tank and the heating device.

[0009] Further, the pushing component further includes an electric push frame. The electric push frame is slidably inserted at the outer end of the evaporation tank, and the electric push frame is fixedly connected to the upper scraper. Guide plates are fixed on both sides of the bottom of the sealing plate. Vertical plates are slidably inserted at the positions corresponding to the guide plates of the lower scraper, and the guide plates are slidably inserted at the bottom of the vertical plates. The vertical plates pass through the top of the lower scraper.

[0010] Further, a slot is provided at the bottom of the upper scraper corresponding to the position where the vertical plate passes through, and the vertical plate is inserted into the slot after the sealing plate is raised. The lower scraper is provided with through grooves corresponding to both ends of the annular heat exchange tube, and the through grooves slide along both sides of the annular heat exchange tube. A rubber layer is provided between the two through grooves.

[0011] Further, the cleaning assembly further includes a collection box. A collection box is fixed to the outer periphery of the top of the vertical pipe. A sliding rod is fixed to one side of the collection box. The top of the vertical pipe is hermetically covered with a top plate, and one end of the top plate is slidably sleeved on the sliding rod. A return spring is sleeved on the surface of the sliding rod between the top plate and the collection box.

[0012] Further, a toothed ring is rotatably installed at the center of the top plate, and a gear is meshed and connected to one side of the toothed ring. A second motor is fixed to the top of the top plate through a mounting frame, and the output end of the second motor is fixed to the gear.

[0013] Further, an inclined plate is rotatably installed at the axis of the top plate through a hollow rotating shaft, and the conical surface of the conical baffle can be in sliding contact with the inclined plate.

[0014] Further, a winding seat is fixedly installed on the top of the sliding rod at the axis of the top plate through a mounting plate, and a pulling rope is wound around the winding shaft of the winding seat. The pulling rope passes through the toothed ring and the top plate and is fixed to the top of the conical baffle.

[0015] Advantages of the present invention: 1. When the winding seat unwinds the pulling rope in the present invention, the conical baffle can naturally descend to the bottom of the vertical pipe to block the vertical pipe and the evaporation box, improving the heating speed inside the evaporation box and being more conducive to improving the evaporation efficiency. The temperature inside the evaporation box is monitored by a pressure sensor and a temperature sensor. When the temperature reaches a certain value, the pressure relief valve is opened to reduce the internal pressure. At the same time, the electric winding seat winds the pulling rope, and the conical baffle moves upward along the vertical pipe under the traction of the pulling rope, cleaning the inner wall of the vertical pipe during the movement to avoid the residue of scale and other attachments.

[0016] 2. At the moment when the conical baffle contacts the bottom of the top rod in the present invention, the inclined plate contacts the conical surface of the conical baffle. The second motor drives the gear to rotate and mesh with the toothed ring, thereby driving the inclined plate to slide along the conical surface of the conical baffle to clean the impurities on the conical surface into the collection box.

[0017] 3. As the evaporation plate of the present invention rotates, the remaining wastewater and crystals can be rotated to the bottom layer of the evaporation tank. The electric push frame is used to push the upper scraper to move, cleaning the bottom of the evaporation plate at this time, scraping off the adhered crystals. After the wastewater and impurities remaining at the bottom of the evaporation plate in the evaporation tank naturally settle and stratify, the supernatant is sent back to the inside of the water supply platform through the reflux pipe. The first electric push rod drives the sealing plate to rise, and the guide plate drives the vertical plate to move upward along the lower scraper and insert into the slot to connect with the upper scraper. Subsequently, the electric push frame drives the upper scraper and the lower scraper to move together, pushing the sediment at the bottom of the evaporation tank out from one side of the slag discharge port and collecting it with the collection tank.

[0018] 4. Driven by the first electric motor and the transmission belt together, the evaporation plates inside the four groups of evaporation tanks flip synchronously. The annular heat exchange pipe has a certain distance from the evaporation plate and will not interfere with the rotation of the evaporation plate. After each evaporation is completed, the remaining waste liquid and crystal sediment are sent to the lower layer, facilitating the evaporation treatment of the next group of wastewater while there is still residual heat.

[0019] 5. Compared with the prior art, the present invention connects multiple groups of evaporation tanks with vertical pipes and tubular membrane modules, separates and evaporates and crystallizes the wastewater, improves the efficiency, and the generated water vapor is filtered by the tubular membrane module. The sediment can be discharged in time through the pushing component and the cleaning component to clean the bottom of the evaporation tank and the inside of the vertical pipe, avoiding affecting the wastewater treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic front view of the overall structure of a high-salt wastewater membrane softening and hardness reduction device of the present invention; Figure 2 It is a schematic side view of the overall structure of a high-salt wastewater membrane softening and hardness reduction device of the present invention; Figure 3 It is a schematic view of the internal structure of the water supply platform of a high-salt wastewater membrane softening and hardness reduction device of the present invention; Figure 4 It is a schematic view of the sending end of the evaporation tank of a high-salt wastewater membrane softening and hardness reduction device of the present invention; Figure 5 It is a schematic view of the structure of the first scraper and the second scraper of a high-salt wastewater membrane softening and hardness reduction device of the present invention; Figure 6 It is a schematic view of the internal structure of the evaporation tank of a high-salt wastewater membrane softening and hardness reduction device of the present invention; Figure 7 It is a schematic view of the structure of the cleaning component of a high-salt wastewater membrane softening and hardness reduction device of the present invention; Figure 8 It is a schematic view of the connection between the top plate and the baffle of a high-salt wastewater membrane softening and hardness reduction device of the present invention.

[0021] In the figure: 1, water supply platform; 11, water inlet pipe; 12, annular heat exchange pipe; 2, evaporation tank; 21, pressure relief valve; 22, vertical pipe; 23, return pipe; 24, first motor; 25, transmission belt; 26, slag discharge port; 27, sealing plate; 28, cross plate; 29, first electric push rod; 210, evaporation plate; 211, rubber strip; 3, tubular membrane module; 4, heating equipment; 41, connecting layer; 42, air inlet and outlet pipe; 5, pushing component; 51, electric push frame; 52, upper scraper; 53, lower scraper; 54, through groove; 55, rubber layer; 56, vertical plate; 57, guide plate; 58, slot; 6, cleaning component; 61, top plate; 62, collection box; 63, sliding rod; 64, second motor; 65, gear; 66, toothed ring; 67, winding seat; 68, pulling rope; 69, return spring; 610, inclined plate; 611, conical baffle; 7, collection tank. Detailed implementation manners

[0022] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0023] Please refer to Figures 1 to 8, the present invention provides a technical solution: a high-salt wastewater membrane softening and hardness reduction device, including a water supply platform 1. At the top of the outermost end of the water supply platform 1, a water inlet pipe 11 is fixed. At the other end of the water supply platform 1, four evaporation tanks 2 are equidistantly fixed. Inside the evaporation tank 2, an evaporation plate 210 is rotatably installed through a bearing. The water supply platform 1 is communicated with the evaporation tank 2 at the top of the evaporation plate 210 through a pipeline. At the position of the evaporation tank 2 at the bottom of the evaporation plate 210, a pushing component 5 is provided. The pushing component 5 includes an upper scraper 52 and a lower scraper 53. Both the upper scraper 52 and the lower scraper 53 are embedded in the inner wall of the evaporation tank 2 close to the water supply platform 1, and the lower scraper 53 is located at the bottom of the first scraper. The top of the upper scraper 52 is on the same straight line as the bottom surface of the evaporation plate 210. At the bottom of the other side of the evaporation tank 2, a slag discharge port 26 is opened, and a sealing plate 27 is slidably inserted into the slag discharge port 26. On the outer end of the evaporation tank 2 on one side of the slag discharge port 26, a heating device 4 is provided. A connecting layer 41 is fixed between adjacent evaporation tanks 2. An air inlet and outlet pipe 42 is installed between the heating device 4 and the connecting layer 41. At the top of the evaporation tank 2, a vertical pipe 22 is fixed. At one side of the top of the vertical pipe 22, a tubular membrane module 3 is fixedly installed. The tubular membrane module 3 is fixed on the top of the heating device 4. At the top of the vertical pipe 22, a cleaning component 6 is provided. The cleaning component 6 includes a conical baffle 611. The bottom of the conical baffle 611 is a circular plate, and the top of the conical baffle 611 is a cone. The conical baffle 611 slides along the inside of the vertical pipe 22. When using the device, the wastewater is sent into the inside of the water supply platform 1 through the water inlet pipe 11 and then sent into the four evaporation tanks 2 respectively. Heat is transferred to the upper layer of the evaporation tank 2 through the heating device 4, the air inlet and outlet pipe 42 and the connecting layer 41 to raise its temperature and evaporate the wastewater. After the evaporation generates steam, the vertical pipe 22 opens to connect the tubular membrane module 3, and the water vapor is sent into the inside of the tubular membrane module 3. The remaining waste liquid and crystal precipitation are sent into the lower layer of the evaporation tank 2 through the rotation of the evaporation plate 210. The precipitation is discharged through the pushing component 5, and the inside of the vertical pipe 22 is cleaned by the cleaning component 6.

[0024] In this embodiment, a circular heat exchange pipe 12 is fixed at the bottom of the evaporation plate 210 of the evaporation tank 2, and the other end of the circular heat exchange pipe 12 is installed inside the water supply platform 1. On one side of the evaporation tank 2 at the bottom of the evaporation plate 210, a return pipe 23 is fixed, and the other end of the return pipe 23 is communicated with the water supply platform 1. The heat of the remaining waste liquid and precipitation in the lower layer inside the evaporation tank 2 is transferred to the new wastewater inside the water supply platform 1 through the circular heat exchange pipe 12. Coupled with the return pipe 23 returning the supernatant to the inside of the water supply platform 1, while reprocessing, the new wastewater can be preheated, reducing the energy consumption of subsequent evaporation.

[0025] In this embodiment, a pressure relief valve 21 is fixed to one side of the top of the evaporation box 2. Rubber strips 211 are fixed to both sides of the evaporation plate 210. The shaft of the evaporation plate 210 passes through the evaporation box 2. A transmission belt 25 is sleeved and installed on the surface of the shafts passing through adjacent evaporation boxes 2. A first motor 24 is fixed to the outer wall of the heating device 4, and the output end of the first motor 24 is fixedly connected to the driving wheel of the transmission belt 25. Driven by the first electric motor and the transmission belt 25 together, the evaporation plates 210 inside the four evaporation boxes 2 are turned synchronously. The annular heat exchange tube 12 is at a certain distance from the evaporation plate 210 and will not interfere with the rotation of the evaporation plate 210. After each evaporation is completed, the remaining waste liquid and crystal precipitation are sent to the lower layer, facilitating the next group of wastewater evaporation treatment while there is still residual heat.

[0026] In this embodiment, a cross plate 28 is fixed to the outside of the sealing plate 27. A first electric push rod 29 is fixed to the outer wall of the evaporation box 2, and the extending end of the first electric push rod 29 is fixedly connected to the cross plate 28. A collection tank 7 is fixed between the slag discharge port 26 of the evaporation box 2 and the heating device 4. The pushing component 5 further includes an electric push frame 51. The electric push frame 51 is slidably inserted into the outer end of the evaporation box 2, and the electric push frame 51 is fixedly connected to the upper scraper 52. Guide plates 57 are fixed to both sides of the bottom of the sealing plate 27. A vertical plate 56 is slidably inserted into the position of the lower scraper 53 corresponding to the guide plate 57, and the guide plate 57 is slidably inserted into the bottom of the vertical plate 56. The vertical plate 56 passes through the top of the lower scraper 53. A slot 58 is opened at the position of the bottom of the upper scraper 52 corresponding to the penetration of the vertical plate 56, and the vertical plate 56 is inserted into the slot 58 after the sealing plate 27 is raised. Through grooves 54 are opened at both ends of the lower scraper 53 corresponding to the annular heat exchange tube 12, and the through grooves 54 slide along both sides of the annular heat exchange tube 12. A rubber layer 55 is provided between the two through grooves 54. As the evaporation plate 210 rotates, the remaining wastewater and crystals can be rotated to the bottom layer of the evaporation box 2. The electric push frame 51 is used to push the upper scraper 52 to move, cleaning the bottom of the evaporation plate 210 at this time and scraping off the adhered crystals. After the wastewater and impurities remaining at the bottom of the evaporation plate 210 in the evaporation box 2 naturally settle and stratify, the supernatant is sent back to the water supply platform 1 through the return pipe 23. The first electric push rod 29 drives the sealing plate 27 to rise, and the guide plate 57 drives the vertical plate 56 to move upward along the lower scraper 53 and insert into the slot 58 to be connected to the upper scraper 52. Subsequently, the electric push frame 51 drives the upper scraper 52 and the lower scraper 53 to move together, pushing the precipitation at the bottom of the evaporation box 2 out from one side of the slag discharge port 26 and collecting it by the collection tank 7. During the movement of the lower scraper 53, it can pass through the surface of the annular heat exchange tube 12 through the through grooves 54 and the rubber layer 55 without moving interference. And the opening between the vertical plate 56 and the lower scraper 53 is small, so the influence on the discharged precipitation is small. In this structure, the electric push frame 51 is actually a combined structure of an electric push rod and an insertion frame to push the upper scraper 52 and the lower scraper 53 to move.

[0027] In this embodiment, the cleaning component 6 further includes a collection box 62. A collection box 62 is fixed to the outer periphery of the top of the vertical pipe 22. A sliding rod 63 is fixed to one side of the collection box 62. The top of the vertical pipe 22 is hermetically covered with a top plate 61, and one end of the top plate 61 is slidably sleeved on the sliding rod 63. A return spring 69 is sleeved on the surface of the sliding rod 63 between the top plate 61 and the collection box 62. A toothed ring 66 is rotatably installed at the center of the top plate 61, and a gear 65 is meshed and connected to one side of the toothed ring 66. A second motor 64 is fixed to the top of the top plate 61 through a mounting frame, and the output end of the second motor 64 is fixed to the gear 65. An inclined plate 610 is rotatably installed at the axis of the top plate 61 through a hollow rotating shaft. The conical surface of the conical baffle 611 can be in sliding contact with the inclined plate 610. A winding base 67 is fixedly installed on the top of the sliding rod 63 located at the axis of the top plate 61 through a mounting plate, and a pull rope 68 is wound around the winding shaft of the winding base 67. The pull rope 68 passes through the toothed ring 66 and the top plate 61 and is fixedly connected to the top of the conical baffle 611. The conical baffle 611 has a certain weight. Therefore, when the winding base 67 unwinds the pull rope 68, the conical baffle 611 can naturally drop to the bottom of the vertical pipe 22 to block the vertical pipe 22 and the evaporation tank 2, improving the heating speed inside the evaporation tank 2 and being more conducive to improving the evaporation efficiency. The temperature inside the evaporation tank 2 is monitored by a pressure sensor and a temperature sensor. When the temperature reaches a certain value, the pressure relief valve 21 is opened to reduce the internal pressure. At the same time, the electric winding base 67 winds the pull rope 68, and the conical baffle 611 moves upward along the vertical pipe 22 under the traction of the pull rope 68. During the movement, the inner wall of the vertical pipe 22 is cleaned to avoid the residue of scale and other attachments until the conical baffle 611 lifts the top plate 61. At this time, the connecting pipe of the tubular membrane module 3 is connected to the evaporation tank 2, and the steam is sent into the tubular membrane module 3 for filtration and then sent out. The top plate 61 slides along the sliding rod 63. At the moment when the conical baffle 611 contacts the bottom of the ejector rod, the inclined plate 610 contacts the conical surface of the conical baffle 611. The second motor 64 drives the gear 65 to rotate and mesh with the toothed ring 66, thereby driving the inclined plate 610 to slide along the conical surface of the conical baffle 611 to clean the impurities on the conical surface into the collection box 62. Here, a solenoid valve can be provided at the connection end of the tubular membrane module 3 and the vertical pipe 22 to prevent the impurities cleaned during the movement of the conical baffle 611 from entering the tubular membrane module 3.

[0028] When using the device, the wastewater is sent into the water supply platform 1 through the water inlet pipe 11, and then respectively sent into the four evaporation tanks 2. Heat is transferred to the upper layer of the evaporation tank 2 through the heating device 4, the inlet and outlet air pipes 42 and the connecting layer 41, so that the temperature rises and the wastewater evaporates. After the steam is generated by evaporation, the vertical pipe 22 opens the connecting tubular membrane module 3, and the water vapor is sent into the internal part of the tubular membrane module 3. The heat of the remaining waste liquid and sediment in the lower layer inside the evaporation tank 2 is transferred to the new wastewater in the water supply platform 1 through the annular heat exchange pipe 12. In addition, the supernatant is returned to the inside of the water supply platform 1 through the return pipe 23. While being processed again, the new wastewater can be preheated, reducing the energy consumption of subsequent evaporation. Driven by the first electric motor and the conveyor belt 25 together, the evaporation plates 210 inside the four groups of evaporation tanks 2 rotate synchronously. The annular heat exchange pipe 12 has a certain distance from the evaporation plate 210 and will not interfere with the rotation of the evaporation plate 210. After each evaporation is completed, the remaining waste liquid and crystal precipitation are sent to the lower layer, which is convenient for carrying out the evaporation treatment of the next group of wastewater while there is still residual heat. As the evaporation plate 210 rotates, the remaining wastewater and crystals can be rotated to the bottom of the evaporation tank 2. The electric push frame 51 is used to push the upper scraper 52 to move, cleaning the bottom of the evaporation plate 210 at this time and scraping off the adhered crystals. After the remaining wastewater and impurities at the bottom of the evaporation plate 210 in the evaporation tank 2 naturally settle and stratify, the supernatant is sent back to the inside of the water supply platform 1 through the return pipe 23. The first electric push rod 29 drives the sealing plate 27 to rise, and the guide plate 57 drives the vertical plate 56 to move upward along the lower scraper 53 and insert into the slot 58 to connect with the upper scraper 52. Subsequently, the electric push frame 51 drives the upper scraper 52 and the lower scraper 53 to move together, pushing the sediment at the bottom of the evaporation tank 2 out from one side of the slag discharge port 26, which is collected by the collection tank 7. During the movement of the lower scraper 53, it can pass through the surface of the annular heat exchange pipe 12 through the through slot 54 and the rubber layer 55 without moving interference. And the opening between the vertical plate 56 and the lower scraper 53 is small, so the influence on the discharged sediment is small. In this structure, the electric push frame 51 is actually a combined structure of an electric push rod and an insertion frame to drive the movement of the upper scraper 52 and the lower scraper 53. The conical baffle 611 has a certain weight itself. Therefore, when the winding seat 67 unwinds the pulling rope 68, the conical baffle 611 can naturally drop to the bottom of the vertical pipe 22 to block the vertical pipe 22 and the evaporation tank 2, improving the heating speed inside the evaporation tank 2 and being more conducive to improving the evaporation efficiency. The temperature inside the evaporation tank 2 is monitored through the pressure sensor and the temperature sensor. When the temperature reaches a certain value, the pressure relief valve 21 is opened to reduce the internal pressure. At the same time, the electric winding seat 67 winds the pulling rope 68, and the conical baffle 611 moves upward along the vertical pipe 22 under the traction of the pulling rope 68. During the movement, the inner wall of the vertical pipe 22 is cleaned to avoid the residue of scale and other attachments until the conical baffle 611 lifts the top plate 61. At this time, the connecting pipe of the tubular membrane module 3 is connected to the evaporation tank 2, and the steam is sent into the internal part of the tubular membrane module 3 for filtration and then sent out. The top plate 61 slides along the slide bar 63,At the moment when the conical baffle 611 contacts the bottom of the ejector rod, the inclined plate 610 contacts the conical surface of the conical baffle 611. The second motor 64 drives the gear 65 to rotate and engage with the toothed ring 66, thereby driving the inclined plate 610 to slide along the conical surface of the conical baffle 611, and cleaning the impurities cleaned on the conical surface into the inside of the collection box 62.,

[0029] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic features of the present invention, the present invention can be implemented in other specific forms.

[0030] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-salt wastewater membrane softening and hardness reduction device, comprising a water supply platform (1), characterized in that: At the top of the outermost end of the water supply platform (1), a water inlet pipe (11) is fixedly installed. At the other end of the water supply platform (1), four evaporation tanks (2) are fixedly installed at equal intervals. Inside the evaporation tank (2), an evaporation plate (210) is rotatably installed through a bearing. The water supply platform (1) is communicated with the evaporation tank (2) above the evaporation plate (210) through a pipeline. At the position of the evaporation tank (2) below the evaporation plate (210), a pushing component (5) is provided. The pushing component (5) includes an upper scraping plate (52) and a lower scraping plate (53). Both the upper scraping plate (52) and the lower scraping plate (53) are embedded in the inner wall of the evaporation tank (2) close to the water supply platform (1), and the lower scraping plate (53) is located at the bottom of the first scraping plate. The top of the upper scraping plate (52) is on the same straight line as the bottom surface of the evaporation plate (210). At the bottom of the other side of the evaporation tank (2), a slag discharge port (26) is opened, and a sealing plate (27) is slidably inserted into the slag discharge port (26). On the outer end of the evaporation tank (2) on one side of the slag discharge port (26), a heating device (4) is provided. A connecting layer (41) is fixed between adjacent evaporation tanks (2). An air inlet and outlet pipe (42) is installed between the heating device (4) and the connecting layer (41). At the top of the evaporation tank (2), a vertical pipe (22) is fixedly installed. On one side of the top of the vertical pipe (22), a tubular membrane module (3) is fixedly installed. The tubular membrane module (3) is fixed on the top of the heating device (4). At the top of the vertical pipe (22), a cleaning component (6) is provided. The cleaning component (6) includes a conical baffle (611). The bottom of the conical baffle (611) is a circular plate, and the top of the conical baffle (611) is a cone, and the conical baffle (611) slides along the inside of the vertical pipe (22).

2. The high-salt wastewater membrane softening and hardness reduction device according to claim 1, characterized in that: At the bottom of the evaporation plate (210) of the evaporation tank (2), an annular heat exchange pipe (12) is fixedly installed, and the other end of the annular heat exchange pipe (12) is installed inside the water supply platform (1). On one side of the evaporation tank (2) at the bottom of the evaporation plate (210), a return pipe (23) is fixedly installed, and the other end of the return pipe (23) is communicated with the water supply platform (1).

3. The high-salt wastewater membrane softening and hardness reduction device according to claim 1, characterized in that: On one side of the top of the evaporation tank (2), a pressure relief valve (21) is fixedly installed. Rubber strips (211) are fixed on both sides of the evaporation plate (210). The shaft of the evaporation plate (210) passes through the evaporation tank (2). A transmission belt (25) is sleeved on the surface of the shafts passing through adjacent evaporation tanks (2). A first motor (24) is fixedly installed on the outer wall of the heating device (4), and the output end of the first motor (24) is fixedly connected with the driving wheel of the transmission belt (25).

4. A high-salt wastewater membrane softening and hardness reduction device according to claim 3, characterized in that: On the outer side of the sealing plate (27), a cross plate (28) is fixedly installed. A first electric push rod (29) is fixedly installed on the outer wall of the evaporation tank (2), and the extending end of the first electric push rod (29) is fixedly connected with the cross plate (28). A collection tank (7) is fixed between the slag discharge port (26) of the evaporation tank (2) and the heating device (4).

5. The high-salt wastewater membrane softening and hardness reduction device according to claim 4, wherein: The pushing component (5) further includes an electric push frame (51). The outer end of the evaporator box (2) is slidably inserted with the electric push frame (51), and the electric push frame (51) is fixedly connected to the upper scraper (52). On both sides of the bottom of the sealing plate (27), guide plates (57) are fixedly installed. At the position corresponding to the guide plates (57) on the lower scraper (53), vertical plates (56) are slidably inserted, and the guide plates (57) are slidably inserted at the bottom of the vertical plates (56). The vertical plates (56) penetrate out from the top of the lower scraper (53).

6. The high-salt wastewater membrane softening and hardness reduction device according to claim 5, wherein: At the position where the vertical plate (56) penetrates out at the bottom of the upper scraper (52), a slot (58) is formed. After the sealing plate (27) rises, the vertical plate (56) is inserted into the slot (58). At both ends of the annular heat exchange tube (12) corresponding to the lower scraper (53), through slots (54) are formed, and the through slots (54) slide along both sides of the annular heat exchange tube (12). A rubber layer (55) is provided between the two through slots (54).

7. The high-salt wastewater membrane softening and hardness reduction device according to claim 1, characterized in that: The cleaning component (6) further includes a collection box (62). The collection box (62) is fixedly installed on the periphery of the top of the vertical pipe (22). On one side of the collection box (62), a sliding rod (63) is fixedly installed. The top of the vertical pipe (22) is hermetically covered with a top plate (61), and one end of the top plate (61) is slidably sleeved on the sliding rod (63). A return spring (69) is sleeved on the surface of the sliding rod (63) between the top plate (61) and the collection box (62).

8. The high-salt wastewater membrane softening and hardness reduction device according to claim 7, wherein: A toothed ring (66) is rotatably installed at the center of the top plate (61), and a gear (65) is meshed and connected to one side of the toothed ring (66). A second motor (64) is fixedly installed on the top of the top plate (61) through a mounting frame, and the output end of the second motor (64) is fixedly connected to the gear (65).

9. The high-salt wastewater membrane softening and hardness reduction device according to claim 8, characterized in that: At the axis of the top plate (61), an inclined plate (610) is rotatably installed through a hollow rotating shaft. The conical surface of the conical baffle (611) can be in sliding contact with the inclined plate (610).

10. A high-salt wastewater membrane softening and hardness reduction device according to claim 9, characterized in that: At the top of the sliding rod (63) at the axis of the top plate (61), a winding seat (67) is fixedly installed through a mounting plate, and a pulling rope (68) is wound on the winding shaft of the winding seat (67). The pulling rope (68) passes through the toothed ring (66) and the top plate (61) and is fixedly connected to the top of the conical baffle (611).

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