A device for separating and reusing hydrogen production waste liquid

Abstract

The present invention relates to the technical field of waste liquid recycling and reuse, and specifically to a hydrogen production waste liquid separation and reuse device, comprising a processing cylinder, a stirring mechanism, a baffle and a drainage mechanism. The liquid is extracted by the drainage mechanism. When the solid-liquid separation is completed, the baffle and the drainage mechanism are removed, and the stirring mechanism is placed on the processing cylinder. The bottom of the processing cylinder is heated, and a rotating shaft is driven to rotate by a driving motor. The rotating shaft drives a transverse frame to rotate during the rotation process. During the rotation of the transverse frame, a cross-shaped plate is driven to rotate circumferentially around the rotating shaft through the rotating shaft, and then the cross-shaped plate drives a stirring rod to turn over the wet silicon powder, thereby accelerating the evaporation of moisture in the wet silicon powder and improving the separation efficiency of the silicon powder in the waste liquid.

Description

Technical Field

[0001] The invention relates to the technical field of waste liquid recovery and reuse, and in particular to a hydrogen production waste liquid separation and reuse device. Background Art

[0002] Hydrogen is a good industrial raw material. Since hydrogen has good reducing properties and is less polluting than carbon, it is used as a reducing agent instead of carbon in metal smelting. In addition, hydrogen can also be used in the fields of synthetic ammonia, antioxidants in the manufacturing process of electronic chips, and industrial fuels.

[0003] Hydrogen can be produced by methods such as water electrolysis and mineral fuel production. In the process of water electrolysis, this method requires large investment, emits large amounts of pollutants, and consumes a lot of water. Therefore, it is suitable for large-scale hydrogen production but not small-scale hydrogen production. Fossil fuel hydrogen production can be divided into catalytic steam reforming hydrogen production and hydrogen production using petroleum and natural gas as raw materials. Although the above process methods are mature, they are not widely promoted due to the limitation of raw material production.

[0004] At present, my country's production of solar-grade silicon ingots exceeds 500,000 tons. About half of the silicon powder is produced in the process of cutting the silicon ingots into silicon wafers. Since there may be metal impurities such as iron inside natural silicon, there may also be metal impurities such as iron inside silicon powder. Therefore, the recycling cost of silicon powder containing metal impurities is high, and it is often treated as waste, which has high processing costs and will bring certain environmental impacts.

[0005] In order to avoid waste of resources, hydrogen is often produced by reacting silicon powder with sodium hydroxide. This method reuses waste silicon. Since sodium silicate will be obtained during the reaction of the two, when the silicon powder is insufficient (different impurity contents will result in different amounts of reactable silicon), new impurities (sodium silicate) will be introduced into the sodium hydroxide solution, and the unreacted sodium hydroxide solution cannot be recycled. In order to ensure that the sodium hydroxide in the solution reacts completely without causing waste, an excess of silicon powder is often required. Therefore, after the reaction, it is necessary to consider recycling the silicon powder and the metal impurities such as iron inside it.

[0006] The prior art provides a technical solution for the recovery and treatment of chemical waste liquid. For example, a Chinese invention patent application with publication number CN207877456U provides a technical solution for the recovery and treatment of chemical waste liquid, which discloses a highly efficient chemical waste liquid recovery and treatment device, which separates solid impurities in the solution by combining a filter screen with activated carbon. The solid impurities remain on the filter screen, and the filtered solution falls into the lower side of the inside of the box, thereby separating the solid and liquid from each other.

[0007] When the above patent application is used to recycle the hydrogen production waste liquid, the excess ferrosilicon powder in the hydrogen production waste liquid can also be filtered out from the sodium silicate solution, but there are still the following defects: 1. After the filter is used for a long time, the silicon powder will clog the mesh of the filter, and the flow rate of the solution will slow down when passing through the filter, thereby increasing the filtration time and affecting the filtration efficiency of the solution. The mesh of the filter may even be completely blocked in the later stage of the filtration process, causing the solution to be unable to pass through the filter.

[0008] 2. The silicon powder after filtration is still moist. When the moist silicon powder is returned to react with the sodium hydroxide solution, it is not only difficult to disperse quickly, but also because it contains water, the proportion of silicon powder that can react with the sodium hydroxide solution is reduced, and the corresponding hydrogen production reaction will be more incomplete. Summary of the invention

[0009] The object of the present invention is to provide a hydrogen production waste liquid separation and reuse device, which separates solid and liquid by draining the liquid first and then evaporating and drying, thereby improving the separation efficiency of silicon powder.

[0010] The present invention is implemented by adopting the following technical scheme: a hydrogen production waste liquid separation and reuse device, comprising a processing cylinder with an opening upward, the outer wall of the processing cylinder is circumferentially evenly equipped with support claws, a discharge port is opened on the rear side of the processing cylinder, a stirring mechanism is arranged inside the processing cylinder, a fence is arranged above the processing cylinder, and a drainage mechanism is arranged on the fence.

[0011] The stirring mechanism includes an operating table that is clamped on the upper end surface of the processing cylinder along the front-to-back direction, wherein a rotating shaft is installed in the middle of the operating table through a bearing, and a horizontal frame is fixedly installed on the rotating shaft below the operating table. A rotating shaft is arranged on the rear side of the horizontal frame, and the lower end of the rotating shaft passes through the horizontal frame and is installed with a cross-shaped plate. A plurality of stirring rods are evenly installed on the four raised lower end surfaces of the cross-shaped plate from the center to the edge of the cross-shaped plate.

[0012] A No. 1 annular gear plate is installed on the outer sides of the four protrusions of the cross-shaped plate. A front-to-back symmetrical connecting rod is installed on the lower end surface of the operating table. A No. 2 annular gear plate meshing with the No. 1 annular gear plate is installed on the lower ends of the two connecting rods.

[0013] The drainage mechanism includes an inverted U-shaped pipe, wherein the two vertical sections of the U-shaped pipe are respectively located inside and outside the enclosure, a connecting protrusion is provided on the right side of the upper end surface of the enclosure, the bent section of the U-shaped pipe is fixed on the connecting protrusion, and a filter plate for intercepting silicon powder is installed at the bottom of the left vertical section of the U-shaped pipe.

[0014] Pour the hydrogen production waste liquid into the treatment cylinder and let it stand inside the enclosure, so that the precipitate in the hydrogen production waste liquid sinks to the bottom of the treatment cylinder. Then use the drainage mechanism to drain the upper-layer hydrogen production waste liquid. Remove the enclosure and the drainage mechanism, and then snap the stirring mechanism onto the treatment cylinder. Heat the bottom of the treatment cylinder to evaporate the liquid inside the hydrogen production waste liquid to obtain dry silicon powder. A magnetic attraction part for recovering iron powder inside the dry silicon powder is arranged in front of the rotating shaft.

[0015] Optionally, the magnetic attraction part includes a connecting block slidably arranged below the front side wall of the rotating shaft. A rotating roller is installed on the front end face of the connecting block through a second driving motor. A plurality of triangular plates are circumferentially and evenly arranged on the circumferential surface of the rotating roller. Magnet sheets are arranged on the circumferential surface of the rotating roller and between adjacent triangular plates.

[0016] Optionally, a C-shaped frame is installed on the left vertical section of the U-shaped tube. A rotating disc is jointly installed between the two vertical sections of the C-shaped frame through bearings. A plurality of拨动 plates are circumferentially and evenly installed on the circumferential surface of the rotating disc. A circular disc and a linkage plate matching with the拨动 plates are sequentially arranged from top to bottom below the left vertical section of the U-shaped tube. A linkage rod is jointly installed between the linkage plate and the circular disc. A telescopic spring is arranged inside the U-shaped tube, and the upper and lower ends of the telescopic spring are respectively fixed on the filter plate and the circular disc. A conical protrusion is arranged on the upper end face of the circular disc.

[0017] Optionally, a moving block is snapped onto the upper end face of the transverse frame. The rotating shaft is installed on the moving block through a bearing. A scraping plate with the same shape as the cross-shaped plate is arranged below the cross-shaped plate, and the stirring rod slidably penetrates through the scraping plate. A fixed connecting rod is jointly installed between the scraping plate and the transverse frame.

[0018] Optionally, an annular scraping plate for separating the metal adsorbed by the magnet sheet is sleeved on the rear side of the rotating roller. A让位槽 for making way for the triangular plate is arranged inside the annular scraping plate. A sliding block moving along its circumference is arranged on the circumferential surface of the annular scraping plate. A connecting spring rod is installed on the upper end face of the sliding block. A moving connecting block is slidably arranged on the lower end face of the transverse frame along the front-rear extension direction, and the lower end of the moving connecting block is fixedly connected to the upper end of the connecting spring rod.

[0019] Optionally, an annular sealing groove is arranged on the upper end face of the treatment cylinder. Card slots are opened on both the front and rear sides of the annular sealing groove. A sealing ring matching with the annular sealing groove is arranged on the lower end face of the enclosure. Clamping protrusions corresponding to the card slots are installed on both the front and rear sides of the sealing ring. An annular sealing belt is arranged at the connection between the enclosure and the treatment cylinder.

[0020] Optionally, a limiting protrusion matching with the card slot is arranged on the lower end face of the transverse frame. The mutual cooperation of the limiting protrusion and the card slot can increase the stability of the transverse frame on the treatment cylinder and prevent the transverse frame from sliding relatively on the treatment cylinder.

[0021] Optionally, the lower end of the stirring rod is configured as a conical structure to reduce the friction force of the stirring rod entering the silicon powder layer, thereby facilitating the stirring rod to quickly enter the silicon powder layer.

[0022] Compared with the prior art, the above-mentioned hydrogen production waste liquid separation and reuse device has the following beneficial effects: 1. The hydrogen production waste liquid is poured into the processing cylinder and the inside of the enclosure and left to stand, so that the excess silicon powder in the hydrogen production waste liquid sinks to the bottom of the processing cylinder, and then the liquid on the upper layer of the hydrogen production waste liquid is discharged through the cooperation of the U-shaped tube and the external water pump, thereby discharging the liquid in the hydrogen production waste liquid. Compared with the existing solid-liquid separation method, the possibility of blockage during the solid-liquid separation process is reduced.

[0023] 2. When the solid-liquid separation is completed, the enclosure and drainage mechanism are removed, and the stirring mechanism is placed on the processing cylinder. The bottom of the processing cylinder is heated, and the rotating shaft is driven by a driving motor to rotate. During the rotation of the rotating shaft, the horizontal frame is driven to rotate. During the rotation of the horizontal frame, the cross-shaped plate is driven by the rotating shaft to rotate circumferentially around the rotating shaft, and then the cross-shaped plate drives the stirring rod to turn the wet silicon powder, thereby accelerating the evaporation of moisture in the wet silicon powder.

[0024] 3. During the circumferential rotation of the cross-shaped plate, the No. 1 annular tooth plate and the No. 2 annular tooth plate cooperate with each other to rotate around the rotating shaft. During the rotation of the cross-shaped plate, the stirring rod is driven to stir the wet silicon powder, causing the silicon powder to flip irregularly, and then the internal silicon powder flips upward to contact the air, so that the moisture of the silicon powder at the bottom of the processing cylinder evaporates quickly into the air, accelerating the evaporation rate of the moisture on the surface of the silicon powder, and improving the drying effect of the silicon powder.

[0025] 4. In the magnetic attraction part, after the silicon powder is dried, the rotating roller is driven to rotate circumferentially through the connecting block during the rotation of the rotating shaft. During the circumferential rotation of the rotating roller, the contact between the triangular plate and the silicon powder can drive the rotating roller to rotate around the connecting block. Then, during the rotation of the rotating roller, the iron powder in the silicon powder can be recovered through the magnet sheet, thereby separating the silicon and iron powder in the silicon powder from each other, thereby improving the recovery efficiency of the silicon powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the hydrogen production waste liquid separation and reuse device provided in an embodiment of the present invention.

[0029] Figure 2 The embodiment of the present invention provides Figure 1 Schematic diagram of the three-dimensional structure after removing the enclosure.

[0030] Figure 3 It is a schematic diagram of the three-dimensional structure of the stirring mechanism provided in an embodiment of the present invention.

[0031] Figure 4 The embodiment of the present invention provides Figure 3 Schematic diagram of some three-dimensional structures.

[0032] Figure 5 The embodiment of the present invention provides Figure 3 A partial enlarged view of point A.

[0033] Figure 6 It is a schematic diagram of a three-dimensional installation structure between a magnetic attraction portion, a rotating shaft and a horizontal frame provided in an embodiment of the present invention.

[0034] Figure 7 The embodiment of the present invention provides Figure 6 A partial enlarged view of point C.

[0035] Figure 8 It is a schematic diagram of the three-dimensional structure of the drainage mechanism provided by an embodiment of the present invention.

[0036] Fig. 9 The embodiment of the present invention provides Figure 8 A partial enlarged view of point B.

[0037] Fig.10 It is a schematic diagram of the internal structure of the left vertical section of the U-shaped tube provided by an embodiment of the present invention (viewed from front to back).

[0038] Fig.11 It is a top view of the processing cylinder provided by an embodiment of the present invention.

[0039] Fig.12 The embodiment of the present invention provides Fig.11 A partial enlarged view of point D.

[0040] Fig.13 It is a bottom view of the enclosure provided by an embodiment of the present invention.

[0041] Fig.14 The embodiment of the present invention provides Fig.13 A partial enlarged view of point E.

[0042] Icon: 1 - Processing cylinder; 11 - Discharge port; 111 - Sealing cover; 12 - Enclosure; 121 - Sealing ring; 122 - Snap projection; 13 - Annular sealing groove; 14 - Card slot; 15 - Annular sealing band; 16 - Limit projection; 2 - Stirring mechanism; 21 - Operating platform; 22 - Rotating shaft; 23 - Horizontal frame; 231 - Moving block; 232 - Scraping plate; 233 - Fixed connecting rod; 24 - Rotating shaft; 25 - Cross-shaped plate; 251 - Stirring rod; 26 - First annular toothed plate; 27 - Connecting rod; 28 - Second annular toothed plate; 29 - Magnetic attraction part; 291 - Connecting block; 292 - Rotating roller; 293 - Triangular plate; 294 - Magnet sheet; 295 - Annular scraping plate; 296 - Sliding block; 297 - Connecting spring rod; 298 - Moving connecting block; 3 - Drainage mechanism; 31 - U-shaped pipe; 311 - C-shaped frame; 312 - Rotating disc; 313 - Poking plate; 314 - Circular disc; 315 - Linking plate; 316 - Linking rod; 317 - Telescopic spring; 318 - Conical projection; 32 - Filter plate; 4 - Support claw. Detailed implementation mode

[0043] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation mode of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0044] Refer to Figure 1 And Figure 2 , a hydrogen production waste liquid separation and reuse device, including a processing cylinder 1 with an upward opening, the outer side wall of the processing cylinder 1 is circumferentially and evenly provided with support claws 4, a discharge port 11 is opened on the side wall of the processing cylinder 1, a stirring mechanism 2 is arranged inside the processing cylinder 1, an enclosure 12 is arranged above the processing cylinder 1, and a drainage mechanism 3 is arranged on the enclosure 12.

[0045] Refer to Figure 1 , Fig.11 , Fig.12 , Fig.13 And Fig.14 , the upper end surface of the processing cylinder 1 is provided with an annular sealing groove 13, card slots 14 are opened on the front and rear sides of the annular sealing groove 13, the lower end surface of the enclosure 12 is provided with a sealing ring 121 matching the annular sealing groove 13, snap projections 122 corresponding to the card slots 14 are installed on the front and rear sides of the sealing ring 121, and an annular sealing band 15 is arranged at the connection between the enclosure 12 and the processing cylinder 1.

[0046] The annular sealing groove 13 and the sealing ring 121 cooperate with each other to seal the connection between the processing cylinder 1 and the enclosure 12. The annular sealing belt 15 can further seal the connection between the processing cylinder 1 and the enclosure 12 to prevent hydrogen production waste liquid from overflowing from the processing cylinder 1 and the enclosure 12. The card groove 14 and the card protrusion 122 cooperate with each other to limit the enclosure 12 to prevent the enclosure 12 and the processing cylinder 1 from relative rotation, thereby improving the stability of the enclosure 12 on the processing cylinder 1.

[0047] See also Figure 3 as well as Figure 4 The stirring mechanism 2 includes an operating table 21 that is clamped on the upper end surface of the processing cylinder 1 along the front-to-back direction, wherein a rotating shaft 22 is installed in the middle of the operating table 21 through a bearing, and a horizontal frame 23 is fixedly installed on the rotating shaft 22 and located below the operating table 21. A rotating shaft 24 is arranged on the rear side of the horizontal frame 23, and the lower end of the rotating shaft 24 passes through the horizontal frame 23 and is installed with a cross-shaped plate 25. A plurality of stirring rods 251 are evenly installed on the four raised lower end surfaces of the cross-shaped plate 25 from the center to the edge of the cross-shaped plate 25.

[0048] A first annular tooth plate 26 is commonly installed on the outer sides of the four protrusions of the cross-shaped plate 25, and a front-to-rear symmetrical connecting rod 27 is installed on the lower end surface of the operating table 21. A second annular tooth plate 28 meshing with the first annular tooth plate 26 is commonly installed on the lower ends of the two connecting rods 27.

[0049] See also Figure 5 The lower end surface of the transverse frame 23 is provided with a limiting protrusion 16 that cooperates with the card slot 14. The limiting protrusion 16 cooperates with the card slot 14 to increase the stability of the transverse frame 23 on the processing cylinder 1 and prevent the transverse frame 23 from sliding relative to the processing cylinder 1.

[0050] See also Figure 2 , Figure 8 as well as Fig.10 The drainage mechanism 3 includes an inverted U-shaped tube 31, wherein the two vertical sections of the U-shaped tube 31 are respectively located on the inner and outer sides of the enclosure 12, a connecting protrusion is provided on the right side of the upper end surface of the enclosure 12, the bent section of the U-shaped tube 31 is fixed on the connecting protrusion, and a filter plate 32 for intercepting silicon powder is installed at the lower part of the left vertical section of the U-shaped tube 31.

[0051] Before the separation starts, use the sealing cover 111 to seal the discharge port 11. Specifically, during the actual operation, in the initial state, take out the stirring mechanism 2 from the inside of the treatment cylinder 1, and then snap the enclosure 12 with the drainage mechanism 3 onto the treatment cylinder 1. A water pump is installed on the right side wall of the enclosure 12 and is connected to the U-shaped pipe 31. Pour the hydrogen production waste liquid after multiple hydrogen production reactions into the treatment cylinder 1 and the enclosure 12 and let it stand still. Due to the adhesiveness of sodium silicate itself, in order to reduce the possibility that the sodium silicate solution may adhere to silicon powder during evaporation, add an excessive amount of water in the early stage of separation, so that the concentration of sodium silicate in the solution is greatly reduced, reducing the possibility of sodium silicate adhering to silicon powder.

[0052] After standing still for a period of time, start the water pump to drain the upper layer of the precipitated solution through the U-shaped pipe 31. In order to avoid taking out a large amount of silicon powder when pumping the upper layer of the solution, keep a certain distance between the bottom of the U-shaped pipe 31 and the inner bottom surface of the treatment cylinder 1. The filter plate 32 can block the silicon powder and prevent the silicon powder from flowing out of the U-shaped pipe 31 along with the solution. Compared with the existing solid-liquid separation methods, the method of draining the liquid through the U-shaped pipe 31 can reduce the possibility of blockage during the solid-liquid separation process. At the same time, using external suction instead of the gravity of the solution itself to achieve filtration separation will have a higher efficiency.

[0053] Refer to Figure 8 、 Fig. 9 and Fig.10 As shown in, a C-shaped frame 311 is installed on the left vertical section of the U-shaped pipe 31. A rotating disk 312 is jointly installed between the two vertical sections of the C-shaped frame 311 through bearings. A plurality of dial plates 313 are circumferentially and evenly installed on the circumferential surface of the rotating disk 312. A circular disk 314 and a linkage plate 315 that cooperates with the dial plate 313 are successively arranged from top to bottom below the left vertical section of the U-shaped pipe 31. A linkage rod 316 is jointly installed between the linkage plate 315 and the circular disk 314. A telescopic spring 317 is arranged inside the U-shaped pipe 31, and the upper and lower ends of the telescopic spring 317 are respectively fixed on the filter plate 32 and the circular disk 314. A conical protrusion 318 is arranged on the upper end surface of the circular disk 314.

[0054] Due to the influence of factors such as water flow, a small amount of silicon powder will still be pumped out of the outside of the treatment cylinder 1 with the water flow. The long-term water flow process may cause the filter holes on the filter plate 32 to be blocked. The U-shaped tube 31 has a large flow rate at the water inlet when extracting the upper solution. Therefore, when the water flows, the rotating disk 312 is driven to rotate counterclockwise through the toggle plate 313. When the toggle plate 313 on the far right rotates, it drives the linkage plate 315 to move up. At this time, the linkage plate 315 drives the circular disk 314 to move up through the linkage rod 316, and the telescopic spring 317 is compressed. During the upward movement of the circular disk 314, the filter holes on the filter plate 32 can be dredged through the conical protrusion 318 The U-shaped tube 31 is treated to reduce the blockage of the U-shaped tube 31 by a small amount of silicon powder in the filter holes on the filter plate 32. At this time, the circular disk 314 is still one end away from the lower end of the U-shaped tube 31 to prevent the negative pressure of the water flow from causing the circular disk 314 to be adsorbed on the lower end of the U-shaped tube 31 and causing the U-shaped tube 31 to be closed. When the conical protrusion 318 contacts the filter holes on the filter plate 32, the toggle plate 313 is disengaged from the linkage plate 315, and the circular disk 314 is reset by the elastic force of the telescopic spring 317. The setting of multiple toggle plates 313 can cooperate with the linkage plate 315 and the circular disk 314 to use the conical protrusion 318 to dredge the filter holes on the filter plate 32, thereby ensuring the discharge efficiency of the upper solution.

[0055] An electric heating wire (not shown in the drawings) is installed on the lower end surface of the outside of the processing cylinder 1. When the upper layer of solution is discharged, the electric heating wire is energized to heat and dry the remaining solution and silicon powder mixture inside the processing cylinder 1. At this time, in order to reduce the influence of the enclosure 12 on the dissipation of moisture, the enclosure 12 and the drainage mechanism 3 are removed to prevent the evaporated moisture from adhering to the inner wall of the enclosure 12. In order to accelerate the evaporation of the solution inside the silicon powder layer, the stirring mechanism 2 is placed on the upper end surface of the processing cylinder 1, so that the stirring rod 251 is inserted into the silicon powder and the lower end of the stirring rod 251 is in contact with the inner bottom surface of the processing cylinder 1.

[0056] See also Figure 4 The lower end of the stirring rod 251 is set to a conical structure to reduce the friction force of the stirring rod 251 entering the silicon powder layer, making it easier for the stirring rod 251 to quickly enter the silicon powder layer.

[0057] A driving motor 1 is installed on the upper end surface of the operating table 21 through a motor seat, and the output shaft of the driving motor 1 is fixedly connected to the rotating shaft 22. When the driving motor 1 is started, the rotating shaft 22 is driven to rotate. During the rotation of the rotating shaft 22, the horizontal frame 23 is driven to rotate. During the rotation of the horizontal frame 23, the cross-shaped plate 25 is driven to rotate around the rotating shaft 22 through the rotating shaft 24, and then the cross-shaped plate 25 drives the stirring rod 251 to turn the wet silicon powder, thereby accelerating the evaporation of moisture in the wet silicon powder.

[0058] In order to further accelerate the evaporation of moisture inside the silicon powder layer, during the circumferential rotation of the cross-shaped plate 25, the first annular tooth plate 26 and the second annular tooth plate 28 cooperate with each other to rotate around the rotating shaft 24. During the rotation of the cross-shaped plate 25, the stirring rod 251 is driven to stir the wet silicon powder, causing the silicon powder to flip irregularly, and then the internal silicon powder flips upward and contacts the air, so that the moisture in the silicon powder at the bottom of the processing cylinder 1 quickly evaporates into the air, thereby accelerating the evaporation rate of moisture on the surface of the silicon powder and improving the drying effect of the silicon powder.

[0059] See also Figure 4 The upper end surface of the horizontal frame 23 is clamped with a moving block 231, and the rotating shaft 24 is installed on the moving block 231 through a bearing. A scraper plate 232 with the same shape as the cross-shaped plate 25 is arranged below the cross-shaped plate 25, and the stirring rod 251 slides through the scraper plate 232, and a fixed connecting rod 233 is installed between the scraper plate 232 and the horizontal frame 23.

[0060] A cylinder is installed on the upper end surface of the horizontal frame 23, and the upper end surface of the telescopic end of the cylinder is fixedly connected to the moving block 231 (not shown in the accompanying drawings). When the silicon powder is dried, the cylinder is started to drive the moving block 231 to move upward. During the movement of the moving block 231, the cross-shaped plate 25 is driven upward by the rotating shaft 24, and then the cross-shaped plate 25 drives the stirring rod 251 to move upward. Due to the adhesion of sodium silicate, a small amount of silicon powder may adhere to the side wall of the stirring rod 251. During the upward movement of the stirring rod 251, the silicon powder attached to the surface of the stirring rod 251 can remain under the scraper plate 232, so that the scraper plate 232 can scrape off the silicon powder adhered to the surface of the stirring rod 251 to ensure the cleanliness of the surface of the stirring rod 251.

[0061] See also Figure 6 as well as Figure 7 The stirring mechanism 2 also includes a magnetic attraction part 29, wherein the magnetic attraction part 29 includes a connecting block 291 slidably arranged below the front side wall of the rotating shaft 22, a rotating roller 292 is installed on the front end surface of the connecting block 291 through the driving motor 2, and a plurality of triangular plates 293 are evenly arranged on the circumferential surface of the rotating roller 292, and a magnet sheet 294 is arranged on the circumferential surface of the rotating roller 292 and between adjacent triangular plates 293.

[0062] An electric telescopic rod is provided on the top of the connecting block 291, and the electric telescopic rod is fixed on the rotating shaft 22. During operation, when the silicon powder is dried, the electric telescopic rod is started to drive the rotating roller 292 to move downward through the connecting block 291, so that the lowermost triangular plate 293 is inserted into the silicon powder. During the rotation of the rotating shaft 22, the connecting block 291 drives the rotating roller 292 to rotate circumferentially. During the circumferential rotation of the rotating roller 292, the driving motor 2 is started to drive the rotating roller 292 to rotate. Then, during the rotation of the rotating roller 292, the iron powder in the silicon powder can be recovered through the magnet sheet 294, so that the silicon and iron powder in the silicon powder are separated from each other. During the rotation of the cross-shaped plate 25, the stirring rod 251 is driven to stir the dried silicon powder, so that the silicon powder is flipped irregularly, and then the iron powder inside the silicon powder layer is flipped upward, so that the magnet sheet 294 can collect the iron powder inside the silicon powder layer to improve the iron powder recovery efficiency.

[0063] See also Figure 7 The rear side of the rotating roller 292 is provided with an annular scraper 295 for detaching the metal adsorbed by the magnet sheet 294. A make way groove for the triangular plate 293 is provided inside the annular scraper 295. A sliding block 296 that moves around its circumference is provided on the circumferential surface of the annular scraper 295. A connecting spring rod 297 is installed on the upper end surface of the sliding block 296. A moving connecting block 298 is slidingly provided on the lower end surface of the transverse frame 23 along the front and rear extension direction. The lower end of the moving connecting block 298 is fixedly connected to the upper end of the connecting spring rod 297.

[0064] As the number of turns of the rotating roller 292 increases, the thickness of the iron powder on the magnet sheet 294 gradually increases, resulting in a decrease in the magnet sheet 294's ability to adsorb the outermost layer of iron powder. As a result, the outermost layer of iron powder is easily to fall off. In order to improve the recovery efficiency of the iron powder, the sealing cover 111 is opened after the rotating roller 292 rotates a certain number of turns, and the end of the rotating roller 292 away from the rotating shaft 22 is moved to the discharge port 11. At this time, the electric push rod is started to drive the rotating roller 292 to move upward through the connecting block 291, so that the rotating roller 292 is separated from the silicon powder layer.

[0065] The worker puts the arc plate into the processing cylinder 1 through the discharge port 11 and makes the arc plate be located directly below the rotating roller 292. An electric slider that moves back and forth is slidably provided on the lower end surface of the transverse frame 23, and the electric slider is fixedly connected to the moving connecting block 298. The electric slider is started to drive the moving connecting block 298 to move backward. At this time, the moving connecting block 298 cooperates with the sliding block 296 through the connecting spring rod 297 to drive the annular scraper 295 to move backward. During the backward movement of the annular scraper 295, the iron powder adsorbed on the magnet sheet 294 can be scraped off and fall onto the arc plate.

[0066] When the iron powder on the magnet sheet 294 is scraped off, the arc plate is slowly moved out, the electric slider is reset, and the annular scraper 295 is reset synchronously. At this time, the sealing cover 111 is closed, and the above actions are repeated until the iron powder in the silicon powder is collected. The function of the connecting spring rod 297 is to provide a certain displacement space for the annular scraper 295 when it moves up and down. The sliding cooperation between the annular scraper 295 and the sliding block 296 ensures that the annular scraper 295 is not hindered by the sliding block 296 when the rotating roller 292 rotates.

[0067] When the iron powder is collected, the sealing cover 111 is opened to pour the silicon powder out from the discharge port 11 .

[0068] In order to prevent the drainage mechanism 3 from being unable to drain the water, the waste liquid is pumped out for the second time before drying. The specific process is as follows: a U-shaped tube 31 with a smaller diameter is placed inside the treatment cylinder 1, and the solution above the silicon powder is slowly extracted through the cooperation of an external water pump and the small-diameter U-shaped tube 31. The purpose of slow extraction is to reduce the discharge of silicon powder from the small-diameter U-shaped tube 31.

[0069] The above-mentioned hydrogen production waste liquid separation and reuse device is used in the process of recycling and reusing hydrogen production waste liquid, including the following steps: the first step, placement treatment: in the initial state, the stirring mechanism 2 is taken out from the inside of the processing cylinder 1, and then the enclosure 12 with the drainage mechanism 3 is clamped with the processing cylinder 1, and the hydrogen production waste liquid after multiple reactions is uniformly poured into the processing cylinder 1 and the enclosure 12 to stand, and excess water is added in the early stage of separation and left to stand.

[0070] Step 2: Drainage treatment: After standing for a period of time, start the water pump to discharge the upper solution through the U-shaped pipe 31.

[0071] Step 3, stirring and drying: after the upper layer of solution is discharged, the electric heating wire is energized to heat and dry the small amount of solution and silicon powder mixture remaining inside the processing cylinder 1. During the drying process, the driving motor drives the rotating shaft 22 to rotate, and the rotating shaft 22 drives the horizontal frame 23 to rotate during the rotation. During the rotation of the horizontal frame 23, the cross-shaped plate 25 is driven to rotate around the rotating shaft 22 through the rotating shaft 24, and then the cross-shaped plate 25 drives the stirring rod 251 to turn over the wet silicon powder.

[0072] Step 4: Recycling: Start the electric telescopic rod to drive the rotating roller 292 to move downward through the connecting block 291, so that the lowermost triangular plate 293 is inserted into the silicon powder. During the rotation of the rotating shaft 22, the connecting block 291 drives the rotating roller 292 to rotate circumferentially. At this time, start the driving motor 2 to drive the rotating roller 292 to rotate. Then, during the rotation of the rotating roller 292, the iron powder in the silicon powder can be recycled through the magnet sheet 294.

[0073] Step 5: Collection and reuse: Collect the iron powder and silicon powder separately, and then use the collected silicon powder as the raw material for the subsequent reaction with sodium hydroxide.

[0074] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0075] In addition, the terms "first", "second", "number one", "number two" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "number one", "number two" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0076] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydrogen production waste liquid separation and recycling device, comprising a treatment cylinder (1) with an opening facing upward, characterized in that: The side wall of the processing cylinder (1) is provided with a discharge port (11), the lower end surface of the outside of the processing cylinder (1) is provided with an electric heating wire, the inside of the processing cylinder (1) is provided with a stirring mechanism (2), a baffle (12) is provided above the processing cylinder (1), and a drainage mechanism (3) is provided on the baffle (12), wherein: The stirring mechanism (2) comprises an operating table (21) which is clamped on the upper end surface of the processing cylinder (1) along the front-back direction, wherein a rotating shaft (22) is installed in the middle of the operating table (21) through a bearing, and a transverse frame (23) is fixedly installed on the rotating shaft (22) and located below the operating table (21), and a rotating shaft (24) is arranged on the rear side of the transverse frame (23), and the lower end of the rotating shaft (24) passes through the transverse frame (23) and is installed with a cross-shaped plate (25), and a plurality of stirring rods (251) are evenly installed on the four raised lower end surfaces of the cross-shaped plate (25) from the center to the edge of the cross-shaped plate (25); A first annular toothed plate (26) is installed on the outer sides of the four protrusions of the cross-shaped plate (25); a front-to-rear symmetrical connecting rod (27) is installed on the lower end surface of the operating table (21); and a second annular toothed plate (28) meshing with the first annular toothed plate (26) is installed on the lower ends of the two connecting rods (27); The drainage mechanism (3) comprises an inverted U-shaped tube (31), wherein the two vertical sections of the U-shaped tube (31) are respectively located inside and outside the enclosure (12), a connecting protrusion is provided on the right side of the upper end surface of the enclosure (12), the curved section of the U-shaped tube (31) is fixed on the connecting protrusion, and a filter plate (32) for intercepting silicon powder is installed inside and below the left vertical section of the U-shaped tube (31); Pour the hydrogen production waste liquid into the processing cylinder (1) and the enclosure (12) and let it stand, so that the excess silicon powder in the hydrogen production waste liquid sinks to the bottom of the processing cylinder (1), and then use the drainage mechanism (3) to discharge the upper layer of the hydrogen production waste liquid, remove the enclosure (12) and the drainage mechanism (3), and then clamp the stirring mechanism (2) on the processing cylinder (1), heat the bottom of the processing cylinder (1) to evaporate the liquid inside the hydrogen production waste liquid to obtain dry silicon powder, and a magnetic attraction part (29) for recovering iron powder inside the dry silicon powder is provided in front of the rotating shaft (22); The magnetic attraction part (29) comprises a connection block (291) slidably arranged below the front side wall of the rotating shaft (22); a rotating roller (292) is installed on the front end surface of the connection block (291) through a second driving motor; a plurality of triangular plates (293) are evenly arranged on the circumferential surface of the rotating roller (292); and a magnet sheet (294) is arranged on the circumferential surface of the rotating roller (292) and between adjacent triangular plates (293); On the left vertical section of the described U-shaped tube (31), a C-shaped frame (311) is installed. Between the two vertical sections of the C-shaped frame (311), a rotating disc (312) is jointly installed through bearings. A plurality of拨动 plates (313) are circumferentially and uniformly installed on the circumferential surface of the rotating disc (312). Below the left vertical section of the U-shaped tube (31), a circular disc (314) and a linkage plate (315) that cooperates with the拨动 plate (313) are arranged in sequence from top to bottom. A linkage rod (316) is jointly installed between the linkage plate (315) and the circular disc (314). A telescopic spring (317) is arranged inside the U-shaped tube (31), and the upper and lower ends of the telescopic spring (317) are respectively fixed on the filter plate (32) and the circular disc (314). A conical protrusion (318) is arranged on the upper end surface of the circular disc (314).

2. The hydrogen production waste liquid separation and recycling device according to claim 1, characterized in that: On the upper end surface of the described transverse frame (23), a moving block (231) is clamped. The rotating shaft (24) is installed on the moving block (231) through bearings. Below the cross-shaped plate (25), a scraping plate (232) with the same shape as it is arranged, and the stirring rod (251) slides through the scraping plate (232). A fixed connecting rod (233) is jointly installed between the scraping plate (232) and the transverse frame (23).

3. The hydrogen production waste liquid separation and recycling device according to claim 1, characterized in that: Behind the described rotating roller (292), an annular scraping plate (295) for separating the adsorbed metal from the magnet sheet (294) is sleeved. A让位槽 for making way for the triangular plate (293) is arranged inside the annular scraping plate (295). A sliding block (296) that moves circumferentially around it is arranged on the circumferential surface of the annular scraping plate (295). A connecting spring rod (297) is installed on the upper end surface of the sliding block (296). A moving connecting block (298) is slidably arranged on the lower end surface of the transverse frame (23) along the front-back extending direction, and the lower end of the moving connecting block (298) is fixedly connected to the upper end of the connecting spring rod (297).

4. The hydrogen production waste liquid separation and recycling device according to claim 1, characterized in that: On the upper end surface of the described processing cylinder (1), an annular sealing groove (13) is arranged. Clamping grooves (14) are opened on the front and back sides of the annular sealing groove (13). On the lower end surface of the enclosure (12), a sealing ring (121) that cooperates with the annular sealing groove (13) is arranged. Clamping protrusions (122) corresponding to the clamping grooves (14) are installed on the front and back sides of the sealing ring (121). An annular sealing belt (15) is arranged at the connection between the enclosure (12) and the processing cylinder (1).

5. The hydrogen production waste liquid separation and recycling device according to claim 4, characterized in that: On the lower end surface of the described transverse frame (23), a limiting protrusion (16) with a clamping groove that cooperates with (14) is arranged.

6. The hydrogen production waste liquid separation and recycling device according to claim 1, characterized in that: The lower end of the described stirring rod (251) is set to be a conical structure.

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