Recovery system

Abstract

A recovery system (100), comprising: a reaction kettle (10), the reaction kettle (10) being provided with a liquid inlet (11), an air inlet (13), a liquid outlet (12) and a slag discharge port (14); a stirring device (20), the stirring device (20) being arranged on the reaction kettle (10), and the stirring device (20) comprising a stirring rod (21) and at least one stirring paddle (22), wherein one end of the stirring rod (21) extends into the reaction kettle (10) and the at least one stirring paddle (22) is arranged at the end of the stirring rod (21) extending into the reaction kettle (10); and an electromagnetic device (30), the electromagnetic device (30) comprising a first electromagnetic coil (31) which is wound on the outer peripheral surface of the reaction kettle (10).

Description

Recycling system

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 31, 2021, with application number 202123449546.X and application name “Recycling System”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of production recycling technology, and in particular to a recycling system. Background Art

[0003] In related technologies, after geothermal water is extracted from geothermal wells, steam is typically separated from the water through methods such as expansion and decompression evaporation to drive steam turbines for power generation. The remaining concentrated geothermal water contains various metal ions, particularly alkali and alkaline earth metals, as well as varying concentrations of lithium, iron, lead, silver, and zinc. Due to the unique characteristics of concentrated geothermal water, suitable equipment, systems, and operating methods are currently lacking for the recovery of iron and other precipitated impurities.

[0004] Summary of the Invention

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to provide a recycling system with a simple structure and high recycling efficiency.

[0006] According to an embodiment of the present application, the recovery system includes: a reactor, a stirring device and an electromagnetic device. The reactor is provided with a liquid inlet, an air inlet, a liquid outlet and a slag discharge port. The stirring device is arranged on the reactor. The stirring device includes a stirring rod and at least one stirring paddle. One end of the stirring rod extends into the reactor. The stirring paddle is arranged on the end of the stirring rod extending into the reactor. The electromagnetic device includes a first electromagnetic coil, which is wound on the outer circumferential surface of the reactor.

[0007] Therefore, by setting up a reactor, the iron ions in the geothermal water can react chemically with the components of the gas and chemical reagents in the reactor to generate ferroferric oxide. By setting up a stirring device on the reactor, the geothermal water can be fully contacted with the gas, which is conducive to the suspension of ferroferric oxide in the geothermal water. At the same time, by setting up an electromagnetic device, the electromagnetic device can generate magnetic attraction to attract ferroferric oxide, thereby realizing the separation of ferroferric oxide and geothermal water. When the electromagnetic device is turned off, the magnetic attraction disappears, which makes it easier for the ferroferric oxide to be discharged from the slag discharge port, thereby realizing the recovery of ferroferric oxide. The structure is simple and the recovery efficiency is high.

[0008] In some embodiments, the recovery system further includes: a liquid distributor, the liquid distributor is connected to the inner wall of the reactor, the liquid distributor is located above the first electromagnetic coil, and a liquid distributor outlet is formed at the bottom of the outer peripheral side of the liquid distributor.

[0009] In some embodiments, the liquid distributor is connected to the liquid outlet.

[0010] In some embodiments, the electromagnetic device further includes a second electromagnetic coil, an outlet pipe is provided at the slag discharge port, and the second electromagnetic coil is wound outside the outlet pipe.

[0011] In some embodiments, the outlet pipe includes: a first pipe segment, a second pipe segment, and a third pipe segment, one end of the first pipe segment is connected to the slag discharge port, the second pipe segment is coaxially arranged with the first pipe segment, the second pipe segment is located on the side of the first pipe segment away from the center of the reactor, the third pipe segment is connected between the other end of the first pipe segment and the second pipe segment, the central axis of the third pipe segment deviates from the central axis of the first pipe segment, and the second electromagnetic coil is wound outside the third pipe segment.

[0012] In some embodiments, an exhaust port and a liquid return port are formed on the reactor, and the recovery system further includes: a condenser and a gas-liquid separator, one end of the condenser is connected to the exhaust port, the gas-liquid separator includes a gas-liquid separator inlet, a gas-liquid separator exhaust port and a gas-liquid separator drain port, the gas-liquid separator inlet is connected to the other end of the condenser, the gas-liquid separator exhaust port is connected to the outside, and the gas-liquid separator drain port is connected to the liquid return port.

[0013] In some embodiments, an air distribution plate connected to the air inlet is provided in the reactor, and a plurality of aeration heads are provided on the air distribution plate.

[0014] In some embodiments, a filter membrane is provided at the liquid outlet.

[0015] In some embodiments, the pore size of the filter membrane is d, wherein d satisfies: 0.3 μm≤d≤1 μm.

[0016] In some embodiments, the recovery system further comprises: a box, and the reactor is arranged in the box.

[0017] In some embodiments, the liquid inlet is formed at the top of the reactor, the air inlet and the liquid outlet are spaced apart from each other and formed at the bottom of the reactor, and the slag discharge port is formed at the bottom of the reactor and spaced apart from the liquid outlet.

[0018] In some embodiments, the reactor comprises metal parts or plastic parts.

[0019] In some embodiments, the stirring rod and the stirring paddle both comprise stainless steel.

[0020] In some embodiments, a reflux valve is provided on the liquid pipeline between the liquid outlet and the liquid distributor.

[0021] In some embodiments, the third tube segment is bent.

[0022] In some embodiments, a plurality of aeration heads are arranged at intervals along the circumference of the reactor.

[0023] In some embodiments, the air distribution plate includes a main pipe and multiple branch pipes connected to the main pipe; the multiple branch pipes are spaced apart on the main pipe, and each branch pipe is spaced apart with multiple aeration heads, and the multiple aeration heads are connected to the branch pipes.

[0024] In some embodiments, one end of the main pipe is connected to the branch pipe, and the other end of the main pipe passes through the bottom of the reactor and is connected to the outside.

[0025] In some embodiments, the plurality of branch pipes are symmetrically arranged in the reactor relative to the central axis of the reactor.

[0026] In some embodiments, the recovery system further comprises an air compressor connected to the air distribution tray. Additional aspects and advantages of the present application will be described in part in the following description, and will become apparent from the following description or learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0028] FIG1 is a schematic structural diagram of a recycling system according to an embodiment of the present application.

[0029] FIG2 is a schematic structural diagram of a liquid distributor of the recovery system in FIG1 .

[0030] FIG3 is a schematic structural diagram of the gas distribution plate of the recovery system in FIG1 .

[0031] Reference numerals:

[0032] Recovery system 100;

[0033] Reactor 10; liquid inlet 11; liquid outlet 12; filter membrane 121; air inlet 13; slag discharge port 14; outlet pipe 15; first pipe section 151; second pipe section 152; third pipe section 153; exhaust port 16; liquid return port 17;

[0034] Stirring device 20; stirring rod 21; stirring paddle 22;

[0035] Electromagnetic device 30; first electromagnetic coil 31; second electromagnetic coil 32;

[0036] Liquid distributor 40; liquid distributor outlet 41; condenser 50;

[0037] Gas-liquid separator 60; gas-liquid separator inlet 61; gas-liquid separator exhaust port 62; gas-liquid separator liquid discharge port 63;

[0038] Air distribution plate 70; aeration head 71; main pipe 710; branch pipe 720;

[0039] Box body 80; air compressor 90; return valve 101; valve body 102; drain valve 103; slag discharge valve 104. DETAILED DESCRIPTION

[0040] The embodiments of the present application are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The recovery system 100 according to the embodiment of the present application is described below with reference to Figures 1 to 3. The recovery system 100 includes a reactor 10, a stirring device 20, and an electromagnetic device 30. The following description uses the recovery system 100 for recovering iron ions in geothermal water extracted from a geothermal well, but this does not represent a limitation thereto. All ions with magnetic properties after precipitation in the geothermal water can be recovered by the recovery system 100 of the present application.

[0041] Specifically, as shown in Figure 1, the reactor 10 is provided with a liquid inlet 11, an air inlet 13, a liquid outlet 12 and a slag discharge port 14. The stirring device 20 is provided on the reactor 10. The stirring device 20 includes a stirring rod 21 and at least one stirring paddle 22. One end of the stirring rod 21 extends into the reactor 10, and the other end of the stirring rod 21 is exposed outside the reactor 10. The stirring paddle 22 is provided at the end of the stirring rod 21 extending into the reactor 10. The electromagnetic device 30 includes a first electromagnetic coil 31, which is wound on the outer circumference of the reactor 10.

[0042] Geothermal water can enter the reactor 10 from the liquid inlet 11, wherein the geothermal water can be mixed with a chemical reagent containing sodium hydroxide. Gas (e.g., air or oxygen, etc.) is introduced through the air inlet 13 to allow the geothermal water to react in the reactor 10, so that the iron ions in the geothermal water can generate ferroferric oxide. The stirring paddle 22 is in the reactor 10 to stir the internal geothermal water so that the gas and the geothermal water are fully mixed and contacted, and the generated ferroferric oxide can be suspended in the geothermal water after stirring. After the first electromagnetic coil 31 is energized, under the action of the magnetic attraction generated by the first electromagnetic coil 31 and the centrifugal force generated by the stirring device 20, the ferroferric oxide can be adsorbed on the inner wall of the reactor 10. After the first electromagnetic coil 31 is de-energized, the magnetic attraction disappears, and the ferroferric oxide can be discharged through the slag discharge port 14 of the reactor 10.

[0043] According to the recovery system 100 of the embodiment of the present application, by setting up the reactor 10, the iron ions in the geothermal water can react chemically with the components of the gas and chemical reagents in the reactor 10 to generate ferroferric oxide. By setting the stirring device 20 on the reactor 10, the geothermal water can be fully contacted with the gas, which is conducive to the suspension of ferroferric oxide in the geothermal water. At the same time, by setting the electromagnetic device 30, the electromagnetic device 30 can generate a magnetic attraction to attract ferroferric oxide and achieve the separation of ferroferric oxide and geothermal water. When the electromagnetic device 30 is turned off, the magnetic attraction disappears, which can facilitate the discharge of ferroferric oxide from the slag outlet 14. The structure is simple and the recovery efficiency is high. The recovery system 100 can be used alone or as part of other systems. It has high practicality and flexibility, while avoiding the introduction of additional water sources, saving the use of fresh water, and improving the recovery efficiency of the geothermal water to be treated.

[0044] In some embodiments, as shown in Figures 1 and 2, the recovery system 100 further includes a liquid distributor 40. The liquid distributor 40 is connected to the inner wall of the reactor 10 and is located above the first electromagnetic coil 31. A liquid distributor outlet 41 is formed at the bottom of the outer periphery of the liquid distributor 40. When ferroferric oxide is adsorbed on the peripheral surface of the reactor 10, liquid in the liquid distributor 40 can flow out of the liquid distributor outlet 41 and flush the ferroferric oxide adsorbed on the peripheral surface of the reactor 10, thereby removing impurities mixed with the ferroferric oxide. The liquid distributor 40 can be configured as a perforated disc type, a weir trough type, or a hybrid type.

[0045] In some embodiments, as shown in FIG1 , the liquid distributor 40 is connected to the liquid outlet 12. A reflux valve 101 may be provided at the liquid outlet 12. The reflux valve 101 is provided on the liquid pipeline between the liquid outlet 12 and the liquid distributor 40. When the reflux valve 101 is opened, the liquid outlet 12 can recover some of the discharged geothermal water, allowing this water to flow to the liquid distributor 40 to clean the ferroferric oxide, thereby recycling the geothermal water and achieving energy conservation.

[0046] In some embodiments, as shown in FIG1 , the electromagnetic device 30 further includes a second electromagnetic coil 32. An outlet pipe 15 is provided at the slag discharge port 14, and the second electromagnetic coil 32 is wound around the outside of the outlet pipe 15. The slag discharge port 14 is located below the reactor 10. When the geothermal water in the reactor 10 is discharged or the geothermal water is lower than the lowest point of the first electromagnetic coil 31, the liquid outlet 12 is closed and the slag discharge port 14 is opened. Unabsorbed impurities are discharged from the slag discharge port 14 into the outlet pipe 15. At this time, the second electromagnetic coil 32 provided on the outside of the outlet pipe 15 operates to allow ferrosoferric oxide to be adsorbed on the wall of the outlet pipe 15. At the same time, impurities are discharged from the outlet pipe 15, thereby achieving further filtration of impurities.

[0047] Therefore, by providing the second electromagnetic coil 32 , the number of times of extracting ferroferric oxide from the impurities can be increased, so that the required ferroferric oxide can be recovered as much as possible, thereby increasing the recovery efficiency of the recovery system 100 .

[0048] In some embodiments, as shown in FIG1 , the outlet pipe 15 includes a first pipe segment 151, a second pipe segment 152, and a third pipe segment 153. One end of the first pipe segment 151 is connected to the slag discharge port 14. The second pipe segment 152 is located on the side of the first pipe segment 151 away from the center of the reactor 10. The third pipe segment 153 is connected between the other end of the first pipe segment 151 and the second pipe segment 152. The central axis of the third pipe segment 153 is offset from the central axis of the first pipe segment 151, and the second electromagnetic coil 32 is wound around the outside of the third pipe segment 153. In some embodiments, the second pipe segment 152 is coaxial with the first pipe segment 151, i.e., the central axis of the second pipe segment 152 is collinear with the central axis of the first pipe segment 151. In other embodiments, the second pipe segment 152 is non-coaxial with the first pipe segment 151, for example, the central axis of the second pipe segment 152 is parallel to the central axis of the first pipe segment 151; or, the central axis of the second pipe segment 152 forms an angle with the central axis of the first pipe segment 151.

[0049] In some embodiments, the first pipe section 151 and the second pipe section 152 are arranged in a straight line, and the third pipe section 153 is arranged in a curved line. In some embodiments, the first pipe section 151, the second pipe section 152, and the third pipe section 153 are all arranged in a straight line, and the third pipe section 153 is arranged to be bent relative to the first pipe section 151 and the second pipe section 152. The third pipe section 153 can be designed as a U-shaped tube. One end of the U-shaped tube is connected to the second pipe section 152, and the other end is connected to the first pipe section 151. A slag discharge valve 104 can be provided at the bottom of the reactor 10. The end of the slag discharge valve 104 away from the reactor 10 is connected to the first pipe section 151. The slag discharge valve 104 can control the opening and closing of the slag discharge port 14. The third pipe section 153 is staggered relative to the centerline axis of the first pipe section 151 and the second pipe section 152. This can increase the time that ferroferric oxide flows within the outlet pipe 15, facilitating the adsorption of ferroferric oxide by the second electromagnetic coil 32. Thus, the first pipe section 151 and the second pipe section 152 are coaxially arranged, and the third pipe section 153 is connected between the first pipe section 151 and the second pipe section 152. The central axis of the third pipe section 153 is offset from the central axis of the first pipe section 151, and the second electromagnetic coil 32 is arranged on the third pipe section 153. The second electromagnetic coil 32 can adsorb ferroferric oxide, while impurities can flow directly out of the outlet pipe 15, thereby achieving separation of impurities and ferroferric oxide. At the same time, such an arrangement can increase the time that ferroferric oxide flows through the outlet pipe 15 and prevent ferroferric oxide from flowing directly out, thereby achieving sufficient filtration of impurities and increasing the adsorption effect of ferroferric oxide. In some embodiments, the third pipe section 153 can also be designed as, but not limited to, a straight pipe, a C-shaped pipe, an S-shaped pipe, etc.

[0050] In some embodiments, as shown in Figure 1, an exhaust port 16 and a liquid return port 17 are formed on the reactor 10, and the recovery system 100 also includes a condenser 50 and a gas-liquid separator 60. One end of the condenser 50 is connected to the exhaust port 16, and the gas-liquid separator 60 includes a gas-liquid separator inlet 61, a gas-liquid separator exhaust port 62 and a gas-liquid separator drain port 63. The gas-liquid separator inlet 61 is connected to the other end of the condenser 50, the gas-liquid separator exhaust port 62 is connected to the outside, and the gas-liquid separator drain port 63 is connected to the liquid return port 17.

[0051] An exhaust port 16 and a liquid return port 17 are provided at the upper end of the reactor 10. When the reactor 10 is operating, the rising gas inside can be discharged from the exhaust port 16 and enter the condenser 50. Under the action of the condenser 50, gas and liquid are formed and flow into the gas-liquid separator 60. Due to the high temperature inside the reactor 10, the fluid entering the exhaust port 16 is a mixture of air and steam. The mixed fluid enters the condenser 50 and condenses, causing the steam to condense into saturated water. The water flows back into the reactor 10 through the liquid return port 17, while the air is discharged through the exhaust port 62 of the gas-liquid separator 60. Here, the exhaust port 62 of the gas-liquid separator 60 can be connected to the external atmosphere to discharge the air directly to the atmosphere, or the exhaust port 62 of the gas-liquid separator 60 can be connected to a gas treatment device (not shown) so that the gas discharged from the gas-liquid separator 60 can enter the gas treatment device for treatment before being discharged. Therefore, the provision of the condenser 50 and the liquid return port 17 can improve the utilization rate of the geothermal water, and the provision of the exhaust port 16 can allow the gas to be discharged.

[0052] In some embodiments, as shown in Figures 1 and 3, an air distribution tray 70 is provided in the reactor 10. The air distribution tray 70 is disposed at the bottom of the reactor 10. It should be noted that the bottom of the reactor 10 can be the side wall of the bottom of the reactor 10; alternatively, it can be the bottom wall of the reactor 10. A plurality of aeration heads 71 ​​are provided on the air distribution tray 70. Specifically, the air distribution tray 70 can include a main pipe 710 and a plurality of branch pipes 720 connected to the main pipe 710. The plurality of branch pipes 720 are spaced apart on the main pipe 710, and the plurality of branch pipes 720 can be symmetrically arranged within the reactor 10 relative to the central axis of the reactor 10. A plurality of aeration heads 71 ​​are spaced apart on the branch pipes 720. The aeration heads 71 ​​are connected to the branch pipes 720, which are connected to one end of the main pipe 710. The other end of the main pipe 710 passes through the reactor 10 at the bottom of the reactor 10 and is connected to the outside. The air distribution plate 70 is connected to the air inlet 13, so that the geothermal water in the reactor 10 can fully react to produce ferroferric oxide, increasing the recovery efficiency of the ferroferric oxide. In some embodiments, the reactor 10 is provided with an air compressor 90 on the air inlet side of the air inlet 13 to increase the wind speed and air volume, further increasing the recovery efficiency of the ferroferric oxide. For example, in this embodiment, the other end of the main pipe 710 can be connected to the air compressor 90, and the air compressor 90 can introduce external air into the air distribution plate 70. Specifically, one end of the main pipe 710 extends through the air inlet 13 into the interior of the reactor 10, and the other end of the main pipe 710 is connected to the air compressor 90.

[0053] Therefore, an air distribution plate 70 and an aeration head 71 are set in the reactor 10. The aeration head 71 can be arranged along the circumference of the reactor 10 so that the aeration head 71 can fully expose the gas, so that the geothermal water can fully react to generate ferroferric oxide, thereby increasing the recovery efficiency of ferroferric oxide.

[0054] In some embodiments, as shown in Figure 1, a filter membrane 121 is provided at the liquid outlet 12 to filter solids present in the geothermal water to prevent the solids from entering the valve body 102. The valve body 102 controls the opening and closing of the liquid outlet 12, reduces the impact of the solids on the valve body 102, improves the working efficiency of the valve body 102, and increases the service life of the valve body 102.

[0055] In some embodiments, the pore size of the filter membrane 121 is d, where d satisfies the following: 0.3 μm ≤ d ≤ 1 μm. Thus, the pore size of the filter membrane 121 is controlled to regulate the flow of solids in the geothermal water, ensuring that some fine particles can be discharged without damaging the valve body 102. This allows the ferroferric oxide to flow to the slag discharge port 14, increasing the recovery of the ferroferric oxide, ensuring the service life of the valve body 102, and preventing blockage of the liquid outlet 12.

[0056] In some embodiments, as shown in FIG1 , the recovery system 100 further includes a housing 80, and the reactor 10 is disposed within the housing 80. Thus, by locating the reactor 10 within the housing 80, the safety of the reactor 10 can be increased, the installation of the reactor 10 can be facilitated, and the overall recovery system 100 can be more aesthetically pleasing. For example, the reactor 10 can be fixedly mounted within the housing 80 to ensure reliable installation.

[0057] In some embodiments, the liquid inlet 11 is formed at the top of the reactor 10, and the gas inlet 13 and the liquid outlet 12 are spaced apart from each other and formed at the bottom of the reactor 10. For example, the gas inlet 13 and the liquid outlet 12 are arranged opposite each other in the radial direction of the reactor 10 and close to the bottom of the reactor 10. The slag discharge port 14 is formed at the bottom of the reactor 10 and spaced apart from the liquid outlet 12. This facilitates the thorough mixing of the gas and the geothermal water, improving the efficiency of the chemical reaction. At the same time, the liquid outlet 12 thus arranged facilitates the discharge of the geothermal water.

[0058] In some embodiments, the reactor 10 includes metal parts or plastic parts. Therefore, the material of the reactor 10 can be specifically set according to actual conditions to take into account both recycling efficiency and reducing the cost of manufacturing the reactor 10.

[0059] In some embodiments, the stirring rod 21 and the stirring paddle 22 are both made of, but not limited to, stainless steel. This is primarily because stainless steel is corrosion-resistant, chemically stable, and has high strength and hardness. This reduces the impact of the stirring paddle 22 and the stirring rod 21 on the geothermal water during stirring, thereby increasing the purity of the generated ferroferric oxide and facilitating recovery by the recovery system 100.

[0060] The following describes the operation method of the recycling system 100 of the present application with reference to FIG1 to FIG3 , including the following steps:

[0061] Step 1: Add sodium hydroxide solution or other suitable conditions to the heated geothermal water to adjust the reaction conditions. For example, sodium hydroxide can adjust the pH of the geothermal water, which helps the recovery system 100 process the reaction. After the geothermal water is injected into the reactor 10, air is introduced and the stirring device 20 is continuously rotated. The air and geothermal water are mixed by the aeration head 71. Air is then introduced for a preset time until all the ferroferric oxide precipitates are completely precipitated. The preset time is approximately 30 to 60 minutes.

[0062] Step 2: Keep the air compressor 90 turned on and the aeration head 71 running. Start the motor of the recovery system 100, and the motor drives the stirring rod 21 to drive the stirring paddle 22 to rotate and stir for 25 minutes to 50 minutes to completely suspend the ferroferric oxide in the geothermal water.

[0063] Step 3: energize the first electromagnetic coil 31 and keep it energized for 30 minutes to 60 minutes, so as to form a layer of ferroferric oxide film on the inner wall of the reactor 10 .

[0064] Step 4: Turn off the stirring device 20 and air compressor 90, and open the liquid outlet 12, reflux valve 101, and drain valve 103. Open the valve body 102 at the liquid outlet 12 and adjust the opening of the reflux valve 101 and drain valve 103 to reduce the liquid level in the reactor 10 at a rate of 1BV / h-3BV / h. The reflux solution after flowing through the reflux valve 101 is distributed along the inner wall of the reactor 10 through the liquid distributor 40, continuously flushing the ferroferric oxide on the walls of the reactor 10 above the liquid level. When the liquid level falls below the lowest point of the first electromagnetic coil 31, close the reflux valve 101 to drain the remaining geothermal water.

[0065] Step 5: Open the slag discharge valve 104 to discharge the precipitated impurities until the clear liquid without solid impurities flows out of the outlet pipe 15, and drain all the residual clear liquid in the reactor 10.

[0066] Step 6: Restart the air compressor 90 and blow dry the inside of the reactor 10 through the aeration head 71 for 5 minutes to 10 minutes.

[0067] Step 7: Turn off the first electromagnetic coil 31 and the second electromagnetic coil 32 to recover ferrosoferric oxide from the reactor 10 and the outlet pipe 15 .

[0068] In addition, during the reaction process of the above-mentioned reactor 10, the exhaust port 16 and the liquid return port 17 provided on the reactor 10 are respectively connected to the condenser 50 and the gas-liquid separator 60. The condenser 50 is used to condense the air that does not participate in the reaction and the water vapor generated by the reaction. The saturated water after condensation flows to the reactor 10 through the gas-liquid separator 60, and the air is discharged through the gas-liquid separator 60.

[0069] Therefore, by directly recovering iron from geothermal water and separating it from other impurities, the treatment efficiency of geothermal water can be improved, and the investment cost of related equipment in the recovery system 100 can be reduced. The recovery efficiency of ferrosoferric oxide is high, and no additional water source needs to be introduced, which saves the use of fresh water. The recovery system 100 has good versatility and sustainability.

[0070] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0071] In the description of the present application, "first feature" and "second feature" may include one or more of the features. In the description of the present application, "plurality" means two or more. In the description of the present application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. In the description of the present application, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0072] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0073] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and purpose of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A recycling system, comprising:a reaction kettle, the reaction kettle being provided with a liquid inlet, a gas inlet, a liquid outlet, and a slag discharging port;a stirring device, the stirring device being arranged on the reaction kettle, the stirring device comprising a stirring rod and at least one stirring paddle, one end of the stirring rod extending into the reaction kettle, and the at least one stirring paddle being arranged at the end of the stirring rod extending into the reaction kettle; andan electromagnetic device, the electromagnetic device comprising a first electromagnetic coil, the first electromagnetic coil being wound on an outer peripheral surface of the reaction kettle,wherein the electromagnetic device further comprises a second electromagnetic coil;an outlet tube is arranged at the slag discharging port; and the second electromagnetic coil is wound outside the outlet tube,wherein the outlet tube comprises:a first tube section, the first tube section being in communication with the slag discharging port;a second tube section, the second tube section being located at a side of the first tube section away from a center of the reaction kettle; anda third tube section, the third tube section being in communication with the first tube section and the second tube section, a central axis of the third tube section deviating from a central axis of the first tube section, and the second electromagnetic coil being wound outside the third tube section.2022425064   29 Jun 20262. The recycling system according to claim 1, further comprising:a liquid distributor, the liquid distributor being connected to an inner wall of the reaction kettle, the liquid distributor being located above the first electromagnetic coil, and a liquid distributor outlet being formed at a bottom of an outer peripheral side of the liquid distributor.

3. The recycling system according to claim 2, wherein the liquid distributor is communication with the liquid outlet.

4. The recycling system according to any of claims 1 to 3, wherein the reaction kettle is further provided with an exhausting port and a liquid return port; andthe recycling system further comprises:a condenser, one end of the condenser being in communication with the exhausting port; anda gas-liquid separator, the gas-liquid separator comprising a gas-liquid separator inlet, a gas-liquid separator gas outlet, and a gas-liquid separator liquid outlet, the gas-liquid separator inlet being in communication with the other end of the condenser, the gas-liquid separator gas outlet being in communication with outside, and the gas-liquid separator liquid outlet being in communication with the liquid return port.

5. The recycling system according to any of claims 1 to 4, wherein the reaction kettle is further provided with a gas distribution disk in communication with the gas inlet, the gas distribution disk being arranged in the reaction kettle, and a plurality of aeration heads being arranged on the gas distribution disk.2022425064   29 Jun 20266. The recycling system according to any of claims 1 to 5, further comprising a filter membrane being arranged at the liquid outlet.

7. The recycling system according to claim 6, wherein an aperture of the filter membrane is d, wherein d satisfies: 0.3 pm < d < 1 pm.

8. The recycling system according to any of claims 1 to 7, further comprising: a box, the reaction kettle being arranged in the box.

9. The recycling system according to any of claims 1 to 7, wherein the liquid inlet is formed on a top of the reaction kettle; the gas inlet and the liquid outlet are spaced apart from each other and formed on a bottom of the reaction kettle; and the slag discharging port is formed on the bottom of the reaction kettle and is spaced apart from the liquid outlet.

10. The recycling system according to any of claims 1 to 7, wherein the reaction kettle comprises a metal member or a plastic member.

11. The recycling system according to any of claims 1 to 7, wherein the stirring rod and the stirring paddle each comprise a stainless steel member.

12. The recycling system according to claim 2 or 3, further comprising a return valve being arranged on a liquid pipeline between the liquid outlet and the liquid distributor.

13. The recycling system according to claim 1, wherein the third tube section is2022425064   29 Jun 2026curved.

14. The recycling system according to claim 5, wherein the plurality of aeration heads are arranged at intervals in a circumferential direction of the reaction kettle.

15. The recycling system according to claim 5 or 14, wherein the gas distribution disk comprises a main tube and a plurality of branch tubes in communication with the main tube; the plurality of branch tubes are distributed on the main tube at intervals; the plurality of aeration heads are arranged on each of the plurality of branch tubes at intervals; and the plurality of aeration heads are in communication with the branch tubes.

16. The recycling system according to claim 15, wherein one end of the main tube is in communication with the branch tube; and the other end of the main tube extends outside the reaction kettle from the bottom of the reaction kettle to be in communication with the outside.

17. The recycling system according to claim 15 or 16, wherein the plurality of branch tubes are symmetrically arranged in the reaction kettle relative to an central axis of the reaction kettle.

18. The recycling system according to any of claims 5 and 14 to 17, further comprising an air compressor, the air compressor being in communication with the gas distribution disk.

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