A high-salinity wastewater treatment device and a graphene composite material adsorption treatment process

Abstract

The application relates to the technical field of wastewater treatment, and discloses a high-salinity wastewater treatment device and a graphene composite material adsorption treatment process, which comprises a main body, a tank body is installed on the main body, a feeding pipe and a discharging pipe are arranged at the two ends of the tank body respectively, and a hollow shaft capable of rotating is installed in the tank body. In the salt scale non-generation stage in the initial stage of wastewater evaporation, the driving assembly can drive the scraper to move and separate from the inner wall of the tank body, thereby reducing unnecessary abrasion of the scraper, prolonging the service life of the scraper, and driving the scraper to contact the inner wall of the tank body again through the driving assembly when the salt scale is generated on the inner wall of the tank body. The driving assembly is favorable for cleaning the salt scale. When the scraper passes through the local high-heat position of the inner wall of the tank body, the driving assembly is started again, the driving assembly can adjust the pressure of the scraper on the inner wall of the tank body through the movement of the driving spring, thereby improving the scraping effect on the area and avoiding the residue of the salt scale.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a high-salt wastewater treatment device and a treatment process using graphene composite material adsorption. Background Technology

[0002] High-salinity wastewater refers to wastewater containing organic matter and at least 3.5% total dissolved solids by mass, including high-salinity domestic wastewater and high-salinity industrial wastewater. High-salinity wastewater undergoes pretreatment via physical methods to remove impurities. It is then passed into a negative-pressure evaporator, where it reaches the wastewater's boiling point at a relatively low temperature. After the steam is discharged, the remaining salt remains in the evaporator and forms solid crystals. These crystals are scraped off using a scraper within the evaporator before being discharged from the outlet.

[0003] Wastewater steam crystallizers are common devices that treat wastewater using the aforementioned principles. They mainly consist of a jacketed tank and an inclined agitator scraper installed inside. The inclined scraper is designed to push solid crystalline scale towards the discharge port during rotation. However, this design has certain shortcomings in practical applications: Currently, the agitator scraper is spring-loaded, allowing it to press firmly against the inner wall of the tank to improve scraping efficiency. However, in the initial stage of wastewater evaporation, there is no crystallization adhering to the inner wall of the tank. At this time, the agitator scraper only agitates the wastewater. The friction between the scraper and the inner wall during rotation increases the resistance to rotation, leading to higher energy consumption and unnecessary wear, reducing its service life. Secondly, steam is typically introduced into the jacket through pipes to heat the tank. The temperature at the connection between the pipe and the jacket is higher than other parts of the jacket, making the corresponding area on the inner wall of the tank more prone to crystallization, resulting in thicker scale that is difficult to scrape off completely. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a high-salt wastewater treatment device and a graphene composite material adsorption process, which has advantages such as improving the service life of the scraper and cleaning crystalline salt scale more thoroughly. It solves the problems of unnecessary wear on the stirring scraper during the initial operation of the evaporator and the difficulty in cleaning thick salt scale layers in local areas of the evaporator tank due to temperature.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a high-salinity wastewater treatment device, comprising a main body, a tank being mounted on the main body, an inlet pipe and a discharge pipe being respectively provided at both ends of the tank, a rotatable hollow shaft being installed inside the tank, a plurality of radially arranged sleeves being fixed on the hollow shaft, a scraper being provided at the end of the sleeve away from the hollow shaft, the scraper being mounted at the end of the scraper by a spring, and a drive assembly being installed inside the hollow shaft; The scraper rotates with the hollow shaft, thus cleaning the salt scale on the inner wall of the tank. The drive assembly includes a drive rod that can be disposed inside the hollow shaft and can move along the axial direction of the hollow shaft. The drive assembly is used to drive the scraper to move radially along the hollow shaft. The drive assembly is also used to drive the spring to move, thereby adjusting the spring force on the scraper. During operation, the tank is heated and the interior is under negative pressure. When sewage is initially injected into the tank, the drive component operates, forcing the scraper to move and detach from the inner wall of the tank. The hollow shaft rotates, driving the scraper to rotate and thus agitate the sewage. When sewage is injected into the tank in the middle stage, the drive component operates again, forcing the scraper to move and re-contact the inner wall of the tank, thereby scraping off the salt scale on the inner wall of the tank. When the scraper passes through a localized high-heat area on the inner wall of the tank, the drive component operates, driving the spring to move and thus increasing the spring force on the scraper, thereby improving the scraping force of the scraper in that area.

[0006] Preferably, the scraper includes a base rod, with vertically distributed insert rods fixedly connected to the middle of the base rod. The insert rods are movably inserted into the sleeve, with one end of the insert rod extending into the hollow shaft. Multiple evenly distributed scraper blades are installed on the side of the base rod away from the insert rods. A movable collar is installed on the end of the sleeve near the base rod. A spring is sleeved on the outside of the insert rod, with one end of the spring fixedly connected to the base rod and the other end of the spring fixedly connected to the movable collar.

[0007] Preferably, the base rod has a through groove at one end inside the hollow shaft, the edge of the through groove has an upper slope, the drive rod passes through the through groove, a drive block is fixedly connected to the drive rod, the drive block has a lower slope, and the angle of the lower slope matches that of the upper slope.

[0008] Preferably, the movable collar is movably sleeved on the outside of the sleeve, and a screw is provided on one side of the sleeve. The screw passes through the movable collar and is threadedly connected to the movable collar. One end of the screw is mounted on the outer wall of the sleeve through a bearing seat, and the other end of the screw passes through the side wall of the hollow shaft and is rotatably connected to the side wall of the hollow shaft.

[0009] Preferably, a drive gear is fixedly connected to one end of the screw inside the hollow shaft, and an incomplete rack is fixedly connected to the drive block. The incomplete rack passes through the through slot and corresponds to the position of the drive gear.

[0010] Preferably, a guide tube is fixed to one end of the hollow shaft cavity, one end of the drive rod is movably inserted into the guide tube, the other end of the drive rod passes through the end of the hollow shaft and extends to the outside of the hollow shaft, a disc is fixed to one end of the drive rod located outside the hollow shaft, the drive assembly also includes a main cylinder fixed to the main body, the output shaft of the main cylinder is in the same direction as the drive rod, a push block is fixed to the output end of the main cylinder, a groove is provided on the push block, and the edge of the disc extends into the groove.

[0011] Preferably, a rotating shaft is fixed in the middle of the scraper, the rotating shaft is rotatably connected to the base rod, a driven gear is fixedly connected to the rotating shaft, a driven rack is slidably connected to the side of the base rod, the driven rack meshes with the driven gear, a cavity is provided inside the base rod, a motor is fixed inside the cavity, the output shaft of the motor extends to the outside of the insertion rod and is fixed with a driving gear, the driving gear meshes with the driven rack.

[0012] Preferably, the discharge pipe includes a straight pipe fixed to the end of the tank, a bend fixed to the bottom wall of the straight pipe, a collection box installed at the end of the bend, an auxiliary cylinder fixed to one end of the straight pipe, the output shaft of the auxiliary cylinder extending into the inside of the straight pipe and fixed with a plug, a gate valve provided on the bend, and an air extraction assembly provided at the end of the hollow shaft, the air extraction assembly being used to extract gas from the collection box.

[0013] Preferably, the air extraction assembly includes a turntable and a piston cylinder. The piston cylinder is fixed to the outer wall of the main body, and a piston is disposed inside the piston cylinder. The turntable is fixed to the end of a hollow shaft. A push rod is provided between the turntable and the piston. One end of the push rod is rotatably connected to the surface of the turntable, and the other end of the push rod is hinged to the piston. An air inlet pipe and an air outlet pipe are fixed to the end of the piston cylinder. One end of the air inlet pipe is fixedly connected to a bend pipe. A first valve is provided at the end of the air inlet pipe near the bend pipe. A branch pipe is fixedly connected at the end of the air inlet pipe near the bend pipe. A second valve is provided on the branch pipe. A first one-way valve is provided at the connection between the air inlet pipe and the piston cylinder, and a second one-way valve is provided at the connection between the air outlet pipe and the piston cylinder.

[0014] The present invention also discloses a graphene composite material adsorption treatment process, which pre-adsorbs high-salt wastewater with graphene composite material, and then uses the above-mentioned high-salt wastewater treatment device to further treat the adsorbed wastewater.

[0015] Compared with the prior art, the present invention provides a high-salt wastewater treatment device and a treatment process using graphene composite material adsorption, which has the following beneficial effects: 1. This high-salt wastewater treatment device and graphene composite material adsorption treatment process, by installing a sleeve, scraper, spring and drive assembly on a hollow shaft inside the tank, allows the scraper to move and detach from the inner wall of the tank during the initial stage of wastewater evaporation before salt scale formation, thereby reducing unnecessary wear on the scraper and improving its service life. When salt scale forms on the inner wall of the tank, the drive assembly re-drives the scraper to contact the inner wall of the tank, which is beneficial for cleaning the salt scale. For localized high-heat areas on the inner wall of the tank, the drive assembly is activated again when the scraper passes through the area. The drive assembly can adjust the pressure of the scraper on the inner wall of the tank by moving the drive spring, thereby improving the scraping effect in that area and avoiding salt scale residue.

[0016] 2. This high-salt wastewater treatment device and graphene composite material adsorption treatment process involves installing a motor inside the base rod. When the motor runs, it drives the drive gear to rotate. When the drive gear rotates, it drives the driven rack to move. When the driven rack moves, it drives multiple driven gears to rotate. When the driven gears rotate, they drive the rotating shaft and scraper to rotate, thereby adjusting the scraper's tilt angle. When the scraper tilt angle changes, the pushing effect on the salt scale changes, thus adjusting the pushing speed. When there is a lot of salt scale in the tank, controlling the speed at which the salt scale moves towards the discharge pipe can effectively prevent the discharge pipe from becoming blocked.

[0017] 3. This high-salt wastewater treatment device and graphene composite material adsorption treatment process, by setting up an air extraction component, can use a hollow shaft to extract gas from the collection box when the tank is working, so that the gas pressure in the collection box is consistent with the gas pressure in the tank. This avoids the gas in the collection box entering the tank when the discharge pipe is opened to remove salt scale, which would cause the gas pressure in the tank to rise and affect the subsequent evaporation process of wastewater. There is no need to readjust the gas pressure through the system on the main body, which reduces the workload, is more convenient, and saves energy. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a high-salinity wastewater treatment device according to the present invention. Figure 1 ; Figure 2 This is a three-dimensional structural diagram of a high-salinity wastewater treatment device according to the present invention. Figure 2 ; Figure 3 This is a cross-sectional view of a high-salinity wastewater treatment device according to the present invention; Figure 4 For the present invention Figure 3 Enlarged view of part A; Figure 5 For the present invention Figure 3 Enlarged view of part B; Figure 6 This is a cross-sectional view of the sleeve of the present invention; Figure 7 This is a schematic diagram of the bottom structure of the base rod of the present invention; Figure 8 This is a schematic diagram of the operation of the air extraction component of the present invention; Figure 9 This is a cross-sectional view of the piston cylinder of the present invention.

[0019] In the diagram: 1. Main body; 2. Tank body; 3. Feed pipe; 4. Discharge pipe; 41. Straight pipe; 42. Bend; 43. Collection box; 44. Auxiliary cylinder; 45. Plug; 46. Gate valve; 5. Hollow shaft; 6. Sleeve; 7. Scraper; 71. Base rod; 72. Insert rod; 73. Scraper blade; 731. Rotating shaft; 732. Driven gear; 733. Driven rack; 734. Cavity; 735. Motor; 736. Drive gear; 74. Movable collar; 75. Through groove; 76. 77. Screw; 78. Bearing housing; 79. Drive gear; 8. Incomplete rack; 90. Spring; 11. Drive assembly; 12. Drive rod; 13. Drive block; 14. Guide tube; 15. Disc; 16. Main cylinder; 17. Push block; 18. Groove; 19. Vacuum assembly; 101. Turntable; 102. Piston cylinder; 103. Piston; 104. Push rod; 105. Intake pipe; 106. Exhaust pipe; 107. First valve; 108. Branch pipe; 109. Second valve. Detailed Implementation

[0020] 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] As described in the background section, there are shortcomings in the existing technology. In order to solve the above-mentioned technical problems, this application proposes a high-salt wastewater treatment device and a treatment process for graphene composite material adsorption.

[0022] Example 1: Please refer to Figures 1-6 A high-salinity wastewater treatment device includes a main body 1, a tank 2 mounted on the main body 1, an inlet pipe 3 and a discharge pipe 4 respectively provided at both ends of the tank 2, a rotatable hollow shaft 5 installed inside the tank 2, a plurality of radially arranged sleeves 6 fixed on the hollow shaft 5, a scraper 7 provided at the end of the sleeve 6 away from the hollow shaft 5, the scraper 7 being mounted at the end of the scraper 7 by a spring 8, and a drive assembly 9 installed inside the hollow shaft 5; The scraper 7 rotates with the hollow shaft 5, and is used to clean the salt scale on the inner wall of the tank 2. The drive assembly 9 includes a drive rod 91 that can be disposed inside the hollow shaft 5 and can move along the axial direction of the hollow shaft 5. The drive assembly 9 is used to drive the scraper 7 to move radially along the hollow shaft 5. The drive assembly 9 is also used to drive the spring 8 to move, thereby adjusting the elastic force of the spring 8 on the scraper 7. When the main body 1 is in operation, the tank 2 is heated and the inside is under negative pressure. When sewage is initially injected into the tank 2, the drive component 9 is activated, forcing the scraper 7 to move and detach from the inner wall of the tank 2. The hollow shaft 5 is activated, driving the scraper 7 to rotate, thereby stirring the sewage. When sewage is injected into the tank 2 in the middle stage, the drive component 9 is activated again, forcing the scraper 7 to move and re-contact the inner wall of the tank 2, thereby scraping off the salt scale on the inner wall of the tank 2. When the scraper 7 passes through a local high-heat area on the inner wall of the tank 2, the drive component 9 is activated, driving the spring 8 to move, thereby increasing the elastic force of the spring 8 on the scraper 7, thereby increasing the scraping force of the scraper 7 in that area.

[0023] The tank 2 is a horizontally positioned cylindrical tank with a jacket in the lower half. Steam is introduced into the jacket to heat the tank 2. The hollow shaft 5 is equipped with multiple sets of sleeves 6 and scrapers 7, which are arranged in a spiral pattern. The axis of the hollow shaft 5 coincides with the axis of the tank 2. The driving method of the hollow shaft 5 is existing technology and will not be described in detail. During operation, the main body 1 rotates, the tank 2 is heated and its interior is under negative pressure. Wastewater enters the tank 2 through the feed pipe 3. At this time, the drive assembly 9 is activated, which drives each scraper 7 to move and detach from the inner wall of the tank 2. Subsequently, when the hollow shaft 5 rotates, it drives the scraper 7 to rotate. The rotating scraper 7 stirs the wastewater to improve evaporation efficiency. Since the scraper 7 does not contact the inner wall of the tank 2, wear is reduced. After the wastewater evaporates for a period of time, crystalline scale begins to appear on the inner wall of the tank 2. At this time, the drive assembly 9 is activated again, which drives each scraper 7 to move and re-adhere to the inner wall of the tank 2. The scraper 7 rotating with the hollow shaft 5 scrapes away the scale on the inner wall of the tank 2. When the scraper 7 passes through a localized high-heat area on the inner wall of the tank 2, the drive assembly 9 operates again, driving the spring 8 to move. When the spring 8 moves, the elastic force on the scraper 7 increases, thereby increasing the pressure of the scraper 7 on the inner wall of the tank 2, thus increasing the scraping force in that area to clean the faster-forming and thicker scale in that area.

[0024] By installing a sleeve 6, scraper 7, spring 8, and drive assembly 9 on the hollow shaft 5 inside the tank 2, in the initial stage of sewage evaporation before scale formation, the drive assembly 9 can drive the scraper 7 to move and detach from the inner wall of the tank 2, thereby reducing unnecessary wear on the scraper 7 and improving its service life. When scale forms on the inner wall of the tank 2, the drive assembly 9 can re-drive the scraper 7 to contact the inner wall of the tank 2, which is beneficial for cleaning the scale. For localized high-heat areas on the inner wall of the tank 2, the drive assembly 9 can be activated again when the scraper 7 passes through the area. The drive assembly 9 can adjust the pressure of the scraper 7 on the inner wall of the tank 2 by moving the drive spring 8, thereby improving the scraping effect in that area and avoiding scale residue.

[0025] Example 2: See Figure 3 and Figure 6 Unlike the above embodiments, the scraper 7 includes a base rod 71, with vertically distributed insert rods 72 fixedly connected to the middle of the base rod 71. The insert rods 72 are movably inserted into the sleeve 6, with one end of the insert rods 72 extending into the hollow shaft 5. Multiple evenly distributed scraper blades 73 are installed on the side of the base rod 71 away from the insert rods 72. A movable collar 74 is installed on the end of the sleeve 6 near the base rod 71. A spring 8 is sleeved on the outside of the insert rods 72, with one end of the spring 8 fixedly connected to the base rod 71 and the other end of the spring 8 fixedly connected to the movable collar 74. A through groove 75 is opened at one end of the base rod 71 inside the hollow shaft 5, with an upper slope surface at the edge of the through groove 75. A drive rod 91 passes through the through groove 75, and a drive block 92 is fixedly connected to the drive rod 91. A lower slope surface is provided on the drive block 92, and the angle between the lower slope surface and the upper slope surface matches.

[0026] Among them, the sleeve 6 is set as a square tube and communicates with the interior of the hollow shaft 5. The insertion rod 72 is set as a square rod, which can prevent the base rod 71 and the insertion rod 72 from rotating. The elastic force of the spring 8 makes the edge of the scraper 73 fit against the inner wall of the tank 2. When the scraper 73 rotates with the hollow shaft 5, it can scrape off the salt scale on the inner wall of the tank 2. In the initial state, the scraper 73 is set at an angle. While scraping off the salt scale, it can also drive the salt scale towards the direction of the discharge pipe 4. When in use, when the drive assembly 9 is running, the drive rod 91 moves inside the hollow shaft 5. When the drive rod 91 moves, it drives the drive block 92 to move. When the drive block 92 moves, the lower slope surface contacts the upper slope surface and squeezes against each other, thereby driving the insert rod 72 to move into the hollow shaft 5. When the insert rod 72 moves, it drives the base rod 71 to move. When the base rod 71 moves, it compresses the spring 8 and drives multiple scrapers 73 to move simultaneously, thereby making the scrapers 73 no longer contact the inner wall of the tank 2. Before the salt scale forms, the rotation of the hollow shaft 5 will not cause the scrapers 73 to make unnecessary contact with the inner wall of the tank 2. When the drive rod 91 moves in the opposite direction inside the hollow shaft 5, the spring force of the spring 8 can drive the insert rod 72 to reset, thereby driving the base rod 71 and the scrapers 73 to reset, and the scrapers 73 re-attach to the inner wall of the tank 2. By setting a drive block 92 on the drive rod 91 and a through groove 75 on the insert rod 72, the drive rod 91 moves by using the squeezing between the upper and lower slopes to drive the entire scraper to move, thereby adjusting the position of the scraper. When it is not necessary to clean the salt scale, the scraper can be adjusted to be detached from the inner wall of the tank 2, which can reduce wear and improve the service life of the scraper.

[0027] Example 3, see Figure 6 Unlike the above embodiments, the movable collar 74 is movably sleeved on the outside of the sleeve 6. A screw 76 is provided on one side of the sleeve 6. The screw 76 passes through the movable collar 74 and is threadedly connected to the movable collar 74. One end of the screw 76 is mounted on the outer wall of the sleeve 6 through a bearing seat 77. The other end of the screw 76 passes through the side wall of the hollow shaft 5 and is rotatably connected to the side wall of the hollow shaft 5. A drive gear 78 is fixedly connected to one end of the screw 76 inside the hollow shaft 5. An incomplete rack 79 is fixedly connected to the drive block 92. The incomplete rack 79 passes through the through groove 75 and corresponds to the position of the drive gear 78. The drive gear 78 is positioned on the moving path of the incomplete rack 79. When the drive rod 91 moves and forces the scraper 7 to reset, the incomplete rack 79 also moves with the drive block 92, but does not contact the drive gear 78. During use, when the scraper 7 moves to the high-heat area of ​​the inner wall of the tank 2, the drive rod 91 operates and moves further. The drive rod 91 drives the drive block 92 to move, and the drive block 92 drives the incomplete rack 79 to move. When the incomplete rack 79 moves, it contacts the drive gear 78, causing it to rotate. When the drive gear 78 rotates, it drives the screw 76 to rotate. When the screw 76 rotates, it drives the movable collar 74 to move along the sleeve 6. When the movable collar 74 moves, it drives the spring 8 to move. Since the scraper 73 on the base rod 71 is in contact with the inner wall of the tank 2 at this time, the base rod 71 cannot move. Therefore, only one end of the spring 8 moves at this time, which further compresses the spring 8. After compression, the spring 8 has a greater elastic force on the base rod 71, which also makes the pressure of the scraper 73 on the base rod 71 on the inner wall of the tank 2 greater. At this time, the scraping effect is also higher. By setting an incomplete rack 79, drive gear 78, screw 76 and bearing seat 77, the drive rod 91 can drive the movable collar 74 to move when it moves further, thereby compressing the spring 8, increasing the elastic force, improving the scraping effect of the scraper 73, and enabling efficient cleaning of thicker salt scale formed in the high-heat area of ​​the inner wall of the tank 2.

[0028] Example 4, see Figures 3-5 Unlike the above embodiments, one end of the hollow shaft 5 is fixed with a guide tube 93, one end of the drive rod 91 is movably inserted into the guide tube 93, and the other end of the drive rod 91 passes through the end of the hollow shaft 5 and extends to the outside of the hollow shaft 5. A disk 94 is fixed to the end of the drive rod 91 located outside the hollow shaft 5. The drive assembly 9 also includes a main cylinder 95 fixed on the main body 1. The output shaft of the main cylinder 95 is in the same direction as the drive rod 91. A push block 96 is fixed to the output end of the main cylinder 95. A groove 97 is provided on the push block 96, and the edge of the disk 94 extends into the groove 97.

[0029] The drive rod 91 is sealed at the end of the hollow shaft 5. When in use, the main cylinder 95 is started and the main cylinder 95 extends and retracts, which can drive the push block 96 to move in different directions. When the push block 96 moves, it pushes the disc 94 through the groove 97, causing the disc 94 to move. When the disc 94 moves, it drives the drive rod 91 to move. The guide tube 93 can guide the drive rod 91 when it moves, ensuring the stability of the drive rod 91.

[0030] The movement of the drive rod 91 is controlled by the extension and retraction of the main cylinder 95, which is highly automated and does not affect the rotation of the hollow shaft 5.

[0031] Example 5, see Figure 6 and Figure 7 Unlike the above embodiments, the scraper 73 has a rotating shaft 731 fixed in the middle, the rotating shaft 731 is rotatably connected to the base rod 71, the driven gear 732 is fixedly connected to the rotating shaft 731, the driven rack 733 is slidably connected to the side of the base rod 71, the driven rack 733 meshes with the driven gear 732, the base rod 71 has a cavity 734, the cavity 734 has a motor 735 fixed inside, the output shaft of the motor 735 extends to the outside of the insert rod 72 and has a driving gear 736 fixed thereon, the driving gear 736 meshes with the driven rack 733.

[0032] Among them, the scraper 73 is set to tilt by default. After the sewage inside the tank 2 evaporates, only salt scale remains in the tank 2. At this time, the discharge pipe 4 is opened and the scraper 7 is controlled to rotate. The scraper 7 can push the salt scale towards the discharge pipe 4. When in use, the motor 735 is started. When the motor 735 is running, it drives the drive gear 736 to rotate. When the drive gear 736 rotates, it drives the driven rack 733 to move. When the driven rack 733 moves, it drives multiple driven gears 732 to rotate. When the driven gears 732 rotate, they drive the rotating shaft 731 and the scraper to rotate, thereby adjusting the scraper's tilt angle. When the scraper tilt angle changes, the pushing effect on the salt scale changes, thereby adjusting the pushing speed. When there is a lot of salt scale in the tank 2, controlling the speed at which the salt scale moves towards the discharge pipe 4 to be reduced can effectively prevent the discharge pipe 4 from becoming blocked.

[0033] Example 6, see Figure 1 , Figure 8 and Figure 9 Unlike the above embodiments, the discharge pipe 4 includes a straight pipe 41 fixed to the end of the tank 2. A bend 42 is fixed to the bottom wall of the straight pipe 41. A collection box 43 is installed at the end of the bend 42. A secondary cylinder 44 is fixed to one end of the straight pipe 41. The output shaft of the secondary cylinder 44 extends into the straight pipe 41 and is fixed with a plug 45. A gate valve 46 is provided on the bend 42. An air extraction assembly 10 is provided at the end of the hollow shaft 5. The air extraction assembly 10 is used to extract gas from the collection box 43. The air extraction assembly 10 includes a turntable 101 and a piston cylinder 102. The piston cylinder 102 is fixed to the outer wall of the main body 1. A piston 103 is provided inside the piston cylinder 102. The turntable 101 is fixed to the hollow shaft 5. At the end, a push rod 104 is provided between the turntable 101 and the piston 103. One end of the push rod 104 is rotatably connected to the surface of the turntable 101, and the other end of the push rod 104 is hinged to the piston 103. An air inlet pipe 105 and an exhaust pipe 106 are fixedly provided at the end of the piston cylinder 102. One end of the air inlet pipe 105 is fixedly connected to the bend pipe 42. A first valve 107 is provided at the end of the air inlet pipe 105 near the bend pipe 42. A branch pipe 108 is fixedly connected at the end of the air inlet pipe 105 near the bend pipe 42. A second valve 109 is provided on the branch pipe 108. A first one-way valve is provided at the connection between the air inlet pipe 105 and the piston cylinder 102. A second one-way valve is provided at the connection between the exhaust pipe 106 and the piston cylinder 102.

[0034] The first one-way valve allows gas from the inlet pipe 105 to enter the piston cylinder 102, and the second one-way valve allows gas from the piston cylinder 102 to enter the exhaust pipe 106. The connection between the collection box 43 and the end of the bend pipe 42 is sealed. When discharging, the gate valve 46 is opened, and then the auxiliary cylinder 44 is started. The auxiliary cylinder 44 contracts and drives the plug 45 to move. The scale in the tank 2 can be discharged after passing through the straight pipe 41 and the bend pipe 42. During operation, when the tank 2 is running, the rotation of the hollow shaft 5 not only drives the scraper 7 to move, but also drives the turntable 101 at the end to rotate. When the turntable 101 rotates, it drives one end of the push rod 104 to rotate, which in turn causes the other end of the push rod 104 to push the piston 103 to move back and forth. When the piston 103 moves back and forth, it first draws the gas in the collection box 43 into the piston cylinder 102 through the air inlet pipe 105, and then discharges it through the exhaust pipe 106. When the gas pressure in the collection box 43 drops to the same level as the gas pressure inside the tank 2, the first valve 107 is closed and the second valve 109 is opened. At this time, the air inlet pipe 105 only absorbs the external air entering from the branch pipe 108, and the gas pressure in the collection box 43 is maintained at this state. After that, the scale can be discharged normally. By setting up the air extraction component 10, the hollow shaft 5 can be used to extract the gas in the collection box 43 when the tank 2 is working, so that the gas pressure in the collection box 43 is consistent with the gas pressure in the tank 2. This avoids the gas in the collection box 43 from entering the tank 2 when the discharge pipe 4 is opened to remove the scale, which would cause the gas pressure in the tank 2 to rise and affect the subsequent evaporation process of wastewater. There is no need to readjust the gas pressure through the system on the main body 1, which reduces the workload, is more convenient, and saves energy.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-salinity wastewater treatment device, comprising a main body, a tank mounted on the main body, and an inlet pipe and a discharge pipe respectively provided at both ends of the tank, characterized in that: The tank body is equipped with a rotatable hollow shaft, and a plurality of radially arranged sleeves are fixed on the hollow shaft. A scraper is provided at the end of the sleeve away from the hollow shaft. The scraper is mounted on the end of the scraper by a spring. A drive assembly is installed inside the hollow shaft. The scraper rotates with the hollow shaft, thus cleaning the salt scale on the inner wall of the tank. The drive assembly includes a drive rod that can be disposed inside the hollow shaft and can move along the axial direction of the hollow shaft. The drive assembly is used to drive the scraper to move radially along the hollow shaft. The drive assembly is also used to drive the spring to move, thereby adjusting the spring force on the scraper. During operation, the tank is heated and the interior is under negative pressure. When sewage is initially injected into the tank, the drive component operates, forcing the scraper to move and detach from the inner wall of the tank. The hollow shaft rotates, driving the scraper to rotate and thus agitate the sewage. When sewage is injected into the tank in the middle stage, the drive component operates again, forcing the scraper to move and re-contact the inner wall of the tank, thereby scraping off the salt scale on the inner wall of the tank. When the scraper passes through a localized high-heat area on the inner wall of the tank, the drive component operates, driving the spring to move and thus increasing the spring force on the scraper, thereby improving the scraping force of the scraper in that area.

2. The high-salinity wastewater treatment device according to claim 1, characterized in that: The scraper includes a base rod, with vertically distributed insert rods fixedly connected to the middle of the base rod. The insert rods are movably inserted into the sleeve. One end of the insert rod extends into the hollow shaft. Multiple evenly distributed scraper blades are installed on the side of the base rod away from the insert rods. A movable collar is installed on the end of the sleeve near the base rod. A spring is sleeved on the outside of the insert rod. One end of the spring is fixedly connected to the base rod, and the other end of the spring is fixedly connected to the movable collar.

3. The high-salinity wastewater treatment device according to claim 2, characterized in that: The base rod has a through groove at one end inside the hollow shaft. The edge of the through groove has an upper slope. The drive rod passes through the through groove. A drive block is fixedly connected to the drive rod. The drive block has a lower slope, and the angle between the lower slope and the upper slope is matched.

4. The high-salinity wastewater treatment device according to claim 3, characterized in that: The movable collar is movably sleeved on the outside of the sleeve. A screw is provided on one side of the sleeve. The screw passes through the movable collar and is threadedly connected to the movable collar. One end of the screw is installed on the outer wall of the sleeve through a bearing seat, and the other end of the screw passes through the side wall of the hollow shaft and is rotatably connected to the side wall of the hollow shaft.

5. The high-salinity wastewater treatment device according to claim 4, characterized in that: The screw is fixedly connected to a drive gear at one end inside the hollow shaft, and an incomplete rack is fixedly connected to the drive block. The incomplete rack passes through the through slot and corresponds to the position of the drive gear.

6. The high-salinity wastewater treatment device according to claim 5, characterized in that: A guide tube is fixed to one end of the hollow shaft cavity. One end of the drive rod is movably inserted into the guide tube. The other end of the drive rod passes through the end of the hollow shaft and extends to the outside of the hollow shaft. A disc is fixed to one end of the drive rod located outside the hollow shaft. The drive assembly also includes a main cylinder fixed to the main body. The output shaft of the main cylinder is in the same direction as the drive rod. A push block is fixed to the output end of the main cylinder. A groove is provided on the push block. The edge of the disc extends into the groove.

7. The high-salinity wastewater treatment device according to claim 2, characterized in that: A rotating shaft is fixed in the middle of the scraper blade. The rotating shaft is rotatably connected to the base rod. A driven gear is fixedly connected to the rotating shaft. A driven rack is slidably connected to the side of the base rod. The driven rack meshes with the driven gear. A cavity is provided inside the base rod. A motor is fixed inside the cavity. The output shaft of the motor extends to the outside of the insertion rod and is fixed with a driving gear. The driving gear meshes with the driven rack.

8. The high-salinity wastewater treatment device according to claim 1, characterized in that: The discharge pipe includes a straight pipe fixed to the end of the tank, a bend fixed to the bottom wall of the straight pipe, a collection box installed at the end of the bend, an auxiliary cylinder fixed to one end of the straight pipe, the output shaft of the auxiliary cylinder extending into the inside of the straight pipe and fixed with a plug, a gate valve provided on the bend, and an air extraction assembly provided at the end of the hollow shaft, the air extraction assembly being used to extract gas from the collection box.

9. A high-salinity wastewater treatment device according to claim 8, characterized in that: The air extraction assembly includes a turntable and a piston cylinder. The piston cylinder is fixed to the outer wall of the main body, and a piston is disposed inside the piston cylinder. The turntable is fixed to the end of a hollow shaft. A push rod is provided between the turntable and the piston. One end of the push rod is rotatably connected to the surface of the turntable, and the other end of the push rod is hinged to the piston. An air inlet pipe and an air outlet pipe are fixed to the end of the piston cylinder. One end of the air inlet pipe is fixedly connected to a bend pipe. A first valve is provided at the end of the air inlet pipe near the bend pipe. A branch pipe is fixedly connected at the end of the air inlet pipe near the bend pipe. A second valve is provided on the branch pipe. A first one-way valve is provided at the connection between the air inlet pipe and the piston cylinder, and a second one-way valve is provided at the connection between the air outlet pipe and the piston cylinder.

10. A process for adsorbing graphene composite materials, characterized in that: The treatment process using graphene composite material adsorption involves pre-adsorbing high-salt wastewater with graphene composite material, and then further treating the adsorbed wastewater using a high-salt wastewater treatment device as described in any one of claims 1-9.

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