Leaching tower
By installing a jet mixer in the leaching tower, the reaction solution and metal powder are more fully mixed and contacted in the leaching tower, which solves the problem of insufficient contact of reactants, improves the reaction rate and efficiency, and eliminates the need for an additional power system.
Patent Information
- Application Number
- CN202511205572.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-27
- Publication Date
- 2025-12-12
AI Technical Summary
In steel production, insufficient contact between reactants in the leaching tower leads to low reaction efficiency, and existing technologies require additional power systems.
By setting up a jet mixer, the technology was realized. The leaching tower adopted a jet mixer, which achieved more thorough mixing of reactants and metal powder in the leaching tower, thus accelerating the reaction rate.
It improves reaction rate and efficiency without requiring an additional power system.
Smart Images
Figure CN121102939A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of auxiliary equipment technology for steel production, specifically a leaching tower. Background Technology
[0002] In the pickling process of the steel industry, a large amount of waste acid containing free hydrochloric acid and iron ions is generated. Direct discharge of this waste acid would cause serious environmental pollution and waste resources. The leaching tower is one of the key pieces of equipment in the acid regeneration process, mainly used to treat the free hydrochloric acid and iron ions in the waste acid to generate ferrous chloride solution, providing raw materials for the subsequent roasting reaction. Therefore, the reaction efficiency and effect of the free acid in the leaching tower directly affect the efficiency of the entire process system and the quality of the products (regenerated acid) and byproducts (iron oxides). To increase the contact area of the reactants and accelerate the reaction rate, current technologies employ measures such as optimizing the in-tower spray system, packing arrangement, or gas distributors. However, the problem of insufficient contact of reactants still exists. Summary of the Invention
[0003] To ensure more thorough contact between the reaction solution and the metal, this invention provides a leaching tower. By incorporating a jet mixer, the reaction solution and metal powder can be more fully mixed and contacted within the leaching tower, thus accelerating the reaction rate. Furthermore, the leaching tower requires no additional power system during operation.
[0004] The technical solution adopted by the embodiments of the present invention to solve its technical problem is as follows:
[0005] A leaching tower includes an outer shell and a jet mixer. The outer shell contains an internal cavity with a middle partition plate. The internal cavity is divided into a sedimentation zone and a reaction zone, which are arranged vertically and vertically. The sedimentation zone and the reaction zone are connected. The metal powder precipitated in the sedimentation zone and the reaction raw material solution can be mixed in the jet mixer and enter the reaction zone.
[0006] The beneficial effects of this invention are: by setting up a jet mixer, the reaction solution and metal powder can be more fully mixed and contacted in the leaching tower, thus accelerating the reaction rate and efficiency. Furthermore, the leaching tower does not require an additional power system during operation. Attached Figure Description
[0007] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.
[0008] Figure 1 This is a schematic diagram of the leaching tower described in this invention.
[0009] Figure 2 This is a schematic diagram of the outer casing and jet mixer.
[0010] Figure 3 yes Figure 2 Enlarged diagram of part A in the middle.
[0011] Figure 4 This is a schematic diagram of the middle partition.
[0012] Figure 5 This is a schematic diagram of the immersion tower described in this invention in its working state.
[0013] The annotations in the attached figures are explained as follows:
[0014] 1. Outer shell; 2. Jet mixer; 3. Intermediate partition; 4. Diffuser; 5. Guide plate; 6. Guide tube; 7. Metal powder inlet; 8. Drain outlet; 9. Gas collection hood;
[0015] 11. Internal cavity; 12. Sedimentation zone; 13. Reaction zone; 14. Collection hopper;
[0016] 21. Jet inlet; 22. Suction inlet; 23. Mixture outlet; 24. Return pipe; 25. Input pipe; 26. Outlet end of input pipe; 27. Branch outlet; 28. Inlet end of return pipe;
[0017] 31. Inner core segment; 32. Middle annular segment; 33. Outer annular segment;
[0018] 61. Annular flow guide channel; 62. Flow outlet;
[0019] 71. Inlet end of the metal powder inlet; 72. Outlet end of the metal powder inlet;
[0020] 91. Exhaust port. Detailed Implementation
[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0022] For ease of understanding and description, the following description of the present invention uses absolute positional relationships. Unless otherwise specified, the directional term "above" indicates... Figure 1 The direction above, the directional word "down" indicates Figure 1 The lower side of the middle, the directional word "left" indicates Figure 1 The left side of the direction, the directional word "right" indicates Figure 1 The right-hand direction in the text, the directional word "front" indicates perpendicular to. Figure 1 The direction of the paper and the direction pointing inwards; the directional word "back" indicates perpendicular to. Figure 1The orientation of the paper is pointed outwards from the viewpoint of the reader or user. This invention is described from the perspective of the reader or user, but the aforementioned directional terms should not be construed as limiting the scope of protection of this invention. Regarding the material, weight, size, angle, and parameters of the components, those skilled in the art can determine or replace them according to actual needs or a limited number of experiments.
[0023] like Figure 1 , Figure 2 As shown, the leaching tower described in this embodiment includes an outer shell 1 and a jet mixer 2. The outer shell 1 contains an internal cavity 11, and an intermediate partition 3 is provided in the internal cavity 11. The internal cavity 11 is divided by the intermediate partition 3 into a sedimentation zone 12 and a reaction zone 13 arranged vertically. The sedimentation zone 12 and the reaction zone 13 are connected. The metal powder precipitated in the sedimentation zone 12 and the reaction raw material solution can be mixed in the jet mixer 2 and enter the reaction zone 13.
[0024] By incorporating the jet mixer 2, the leaching tower allows for more thorough mixing and contact between the reaction solution and the metal powder, thus accelerating the reaction rate. Furthermore, the leaching tower requires no additional power system during operation.
[0025] As an alternative implementation, the jet mixer 2 is located outside the outer casing 1. The jet mixer 2 has a venturi tube structure and includes a jet inlet 21, a suction inlet 22, and a mixture outlet 23. The suction inlet 22 is connected to the sedimentation zone 12 via a return pipe 24, and the mixture outlet 23 is connected to the reaction zone 13 via an input pipe 25. The reaction raw material solution can enter the jet mixer 2 through the jet inlet 21. The jet mixer 2 can return the metal powder from the sedimentation zone 12 without additional power.
[0026] As one possible implementation method, such as Figure 1 , Figure 2 As shown, the outer shell 1 is an upright cylindrical structure, the jet mixer 2 is located below the sedimentation zone 12, the input pipe 25 passes through the outer shell 1, the input pipe 25 has a horizontal L-shaped structure, the input pipe 25 contains a vertical section and a horizontal section connected in sequence, the axis of the vertical section of the input pipe 25 coincides with the axis of the outer shell 1, the outlet end 26 of the input pipe is located in the reaction zone 13, the outlet end 26 of the input pipe faces upward, and the axis of the outlet end 26 of the input pipe coincides with the axis of the outer shell 1.
[0027] As one possible implementation, the outlet end 26 of the input pipe is located at the lower part of the outer shell 1. A diffuser 4 is provided in the reaction zone 13. The diffuser 4 is in an upright state. There is a gap between the diffuser 4 and the middle partition 3 in the vertical direction. Both the upper and lower ends of the diffuser 4 are in an open state. The inner diameter of the diffuser 4 is larger than the outer diameter of the outlet end 26 of the input pipe. The outlet end 26 of the input pipe in the vertical direction is located in the middle of the diffuser 4.
[0028] As one possible implementation method, such as Figure 1 , Figure 2 As shown, a collecting hopper 14 is provided at the lower part of the outer casing 1. The collecting hopper 14 is a conical structure with the top end facing down and the bottom end facing up. The input pipe 25 passes through the top end of the collecting hopper 14, and the lower end of the vertical section of the input pipe 25 corresponds to the lower end of the collecting hopper 14. There is a gap between the diffuser tube 4 and the collecting hopper 14. The high-speed flowing liquid ejected from the outlet end 26 of the input pipe can generate a negative pressure in the diffuser tube 4, causing the metal powder deposited at the bottom of the collecting hopper 14 to flow upward and enter the diffuser tube 4.
[0029] like Figure 2 , Figure 3 As shown, in order to prevent metal powder from depositing at the lower end of the collection hopper 14, branch outlets 27 are provided on the wall of the input pipe 25. Multiple branch outlets 27 are located at the lower part of the vertical section of the input pipe 25. The multiple branch outlets 27 are evenly spaced along the circumference of the vertical section of the input pipe 25. The inner diameter of the branch outlet 27 is 5% to 10% of the inner diameter of the outlet end 26 of the input pipe. The branch outlets 27 are located between the diffuser 4 and the collection hopper 14.
[0030] As an alternative implementation, a guide plate 5 is also provided in the reaction zone 13. The guide plate 5 and the diffuser 4 are arranged vertically at intervals, and the intermediate partition plate 3 and the guide plate 5 are also arranged vertically at intervals. The guide plate 5 is a frustoconical structure with its top facing upwards and its bottom facing downwards. The top of the guide plate 5 is closed, and the bottom of the guide plate 5 is open. The axis of the guide plate 5 coincides with the axis of the diffuser 4, and the inner diameter of the bottom end of the guide plate 5 is larger than the outer diameter of the upper end of the diffuser 4. The guide plate 5 can direct the fluid ejected from the diffuser 4 towards the lower part of the outer shell 1, and under the action of the guide plate 5, it enters the reaction zone 13, realizing the fluidization of the powder in the reaction zone 13, and increasing the multiple circulation contact and reaction between the reaction solution and the metal powder.
[0031] As one possible implementation method, such as Figure 1 , Figure 2 and Figure 4As shown, the intermediate partition 3 contains an inner core section 31, a middle annular section 32, and an outer annular section 33 connected sequentially from the inside to the outside. The inner core section 31, the middle annular section 32, and the outer annular section 33 are nested sequentially from the inside to the outside. The inner core section 31 is higher than the outer annular section 33. The middle annular section 32 is a frustoconical cylinder structure with the top end facing up and the bottom end facing down. The inlet end 28 of the reflux pipe is connected to the outer annular section 33. The reflux pipe 24 is located below the intermediate partition 3. The reflux pipe 24 passes through the outer shell 1. A part of the reflux pipe 24 is located inside the reaction zone 13, and the other part of the reflux pipe 24 is located outside the outer shell 1.
[0032] As one possible implementation method, such as Figure 1 , Figure 2 As shown, a guide tube 6 is also provided in the internal cavity 11. The guide tube 6 is an upright cylindrical structure. The outer shell 1, the guide tube 6, and the middle partition 3 are sequentially nested from the outside to the inside. An annular guide channel 61 is formed between the outer shell 1 and the guide tube 6. The upper end of the annular guide channel 61 is sealed and fixed to the outer shell 1 by an annular connecting plate. The upper end of the annular guide channel 61 is in a closed state. An outlet 62 is provided at the upper part of the annular guide channel 61. Multiple outlets 62 are evenly spaced along the circumference of the guide tube 6. The outlets 62 can be rectangular or circular. The annular guide channel 61 is connected to the sedimentation zone 12 through the outlets 62. The outlets 62 are located above the middle partition 3. The lower end of the annular guide channel 61 is in an open state. The annular guide channel 61 is connected to the reaction zone 13 through the lower end of the annular guide channel 61. The substances in the reaction zone 13 can enter the sedimentation zone 12 sequentially through the annular guide channel 61 and the outlets 62.
[0033] As one possible implementation method, such as Figure 1 , Figure 2 As shown, the leaching tower also includes a metal powder inlet 7 and a drain outlet 8. Both the metal powder inlet 7 and the drain outlet 8 are horizontal tubular structures. The metal powder inlet 7 passes through the outer shell 1 and can be a flange manhole. The inlet end 71 of the metal powder inlet is located outside the outer shell 1, and the outlet end 72 of the metal powder inlet is connected to the guide tube 6. The metal powder inlet 7 is connected to the reaction zone 13. The drain outlet 8 is located at the upper part of the outer shell 1 and is connected to the sedimentation zone 12.
[0034] As an alternative implementation, the impregnation tower further includes a gas collecting hood 9, which is sealed and fixed to the outer shell 1. The internal space of the gas collecting hood 9 is connected to the inner sedimentation zone 12, and an exhaust port 91 is provided at the upper end of the gas collecting hood 9.
[0035] The working process of the impregnation tower is described below.
[0036] like Figure 5As shown, metal powder (such as iron powder) periodically enters the reaction zone 13 through the metal powder inlet 7. The raw material pump sends the reaction raw material solution (such as treated waste acid liquid) into the jet mixer 2 through the jet inlet 21. The metal powder precipitated in the sedimentation zone 12 and the reaction raw material solution can be mixed in the jet mixer 2 and enter the diffuser 4 through the input pipe 25. The metal powder and the reaction raw material solution are fully mixed and in contact. The metal powder and the reaction raw material solution pass through the diffuser 4 and the guide plate 5 in sequence and then enter the reaction zone 13, where they continue to be fully mixed and in contact. The metal powder and the reaction raw material solution pass through the annular guide channel 61 and the overflow outlet 62 in sequence and enter the sedimentation zone 12. In the sedimentation zone 12, the unreacted metal powder precipitates in the bottom deposition area of the intermediate partition 3. The precipitated metal powder enters the input pipe 25. After the reaction, the solution is discharged through the drain outlet 8 after sedimentation. The gas generated by the reaction enters the gas collection hood 9 upward and then exits through the exhaust outlet 91.
[0037] The above description is merely a specific embodiment of the present invention and should not be construed as limiting the scope of the invention. Therefore, substitutions of equivalent components, or equivalent changes and modifications made within the scope of protection of the present invention, should still fall within the scope of the present invention. Furthermore, the technical features, technical solutions, and embodiments of the present invention can be freely combined and used.
Claims
1. An immersion digester characterized by, The leaching tower comprises an outer shell (1) and a jet mixer (2), the outer shell (1) contains an inner cavity (11), the inner cavity (11) is provided with an intermediate partition plate (3), the inner cavity (11) is divided into a precipitation zone (12) and a reaction zone (13) arranged in sequence by the intermediate partition plate (3), the precipitation zone (12) and the reaction zone (13) are communicated, and the metal powder and the reaction raw material solution precipitated from the precipitation zone (12) can be mixed in the jet mixer (2) and then enter the reaction zone (13).
2. The countercurrent extraction column according to claim 1, characterized in that The jet mixer (2) is located outside the outer shell (1), the jet mixer (2) is in a Venturi tube structure, the jet mixer (2) contains a jet inlet (21), a suction inlet (22) and a mixture outlet (23), the suction inlet (22) is communicated with the precipitation zone (12) through a reflux pipeline (24), and the mixture outlet (23) is communicated with the reaction zone (13) through an input pipeline (25).
3. The countercurrent extraction column of claim 2, wherein, The jet mixer (2) is located below the precipitation zone (12), the input pipeline (25) penetrates through the outer shell (1), an outlet end (26) of the input pipeline is located in the reaction zone (13), the outlet end (26) of the input pipeline faces upwards, and the axis of the outlet end (26) of the input pipeline coincides with the axis of the outer shell (1).
4. The countercurrent extraction column of claim 3, wherein, The outlet end (26) of the input pipeline is located at the lower part of the outer shell (1), a diffusion pipe (4) is arranged in the reaction zone (13), the diffusion pipe (4) is in an upright state, the upper end and the lower end of the diffusion pipe (4) are both in an open state, the inner diameter of the diffusion pipe (4) is greater than the outer diameter of the outlet end (26) of the input pipeline, and the outlet end (26) of the input pipeline is located at the middle part of the diffusion pipe (4) in the up-down direction.
5. The countercurrent extraction column of claim 4, wherein, The lower part of the outer shell (1) is provided with a collecting hopper (14), the collecting hopper (14) is in a conical structure with the top end facing downwards and the bottom end facing upwards, the input pipeline (25) penetrates through the top end of the collecting hopper (14), there is a spacing between the diffusion pipe (4) and the collecting hopper (14), a branch outlet (27) is arranged on the pipe wall of the input pipeline (25), the inner diameter of the branch outlet (27) is 5% to 10% of the inner diameter of the outlet end (26) of the input pipeline, and the branch outlet (27) is located between the diffusion pipe (4) and the collecting hopper (14).
6. The countercurrent extraction column of claim 4, wherein, A flow guide plate (5) is further arranged in the reaction zone (13), the flow guide plate (5) and the diffusion pipe (4) are arranged in an up-down interval, the flow guide plate (5) is in a frustum structure with the top end facing upwards and the bottom end facing downwards, the top end of the flow guide plate (5) is in a closed state, the bottom end of the flow guide plate (5) is in an open state, the axis of the flow guide plate (5) coincides with the axis of the diffusion pipe (4), and the inner diameter of the bottom end of the flow guide plate (5) is greater than the outer diameter of the upper end of the diffusion pipe (4).
7. The immersion digester of claim 1, wherein, The intermediate partition plate (3) comprises an inner core section (31), an intermediate annular section (32) and an outer ring section (33) connected in sequence from inside to outside, the inner core section (31) is higher than the outer ring section (33), the intermediate annular section (32) is a frustum of cone structure with the top end upward and the bottom end downward, the inlet end (28) of the reflux pipeline is connected with the outer ring section (33), the reflux pipeline (24) passes through the outer shell (1), one part of the reflux pipeline (24) is located in the reaction zone (13), and the other part of the reflux pipeline (24) is located outside the outer shell (1).
8. The immersion digester of claim 1, wherein, The inner cavity (11) is also provided with a flow guide cylinder (6), the outer shell (1) and the flow guide cylinder (6) are both upright cylindrical structures, the outer shell (1), the flow guide cylinder (6) and the intermediate partition plate (3) are sequentially sleeved from outside to inside, the annular flow guide channel (61) is formed between the outer shell (1) and the flow guide cylinder (6), the upper end of the annular flow guide channel (61) is in a closed state, the upper part of the annular flow guide channel (61) is provided with an overflow outlet (62), the annular flow guide channel (61) communicates with the precipitation zone (12) through the overflow outlet (62), the lower end of the annular flow guide channel (61) is in an open state, and the annular flow guide channel (61) communicates with the reaction zone (13) through the lower end of the annular flow guide channel (61).
9. The countercurrent extraction column of claim 8, wherein, The leaching tower also comprises a metal powder inlet (7) and a liquid discharge port (8), the metal powder inlet (7) passes through the outer shell (1), the inlet end (71) of the metal powder inlet is located outside the outer shell (1), the outlet end (72) of the metal powder inlet is connected with the flow guide cylinder (6), the metal powder inlet (7) communicates with the reaction zone (13), and the liquid discharge port (8) is located at the upper part of the outer shell (1) and communicates with the precipitation zone (12).
10. The immersion digester of claim 1, wherein, The leaching tower also comprises a gas collecting cover (9), the gas collecting cover (9) and the outer shell (1) are sealingly connected and fixed in an up-down mode, the inner space of the gas collecting cover (9) communicates with the inner precipitation zone (12), and the upper end of the gas collecting cover (9) is provided with an exhaust port (91).