Vanadium precipitation reaction kettle

Abstract

The utility model discloses a vanadium precipitation reaction kettle, including kettle body and separation tank, the kettle body bottom middle position is equipped with the liquid outlet pipe. The utility model discloses a separation tank and liquid outlet pipe are connected can be separated after the reaction is completed with clean waste liquid and the separation operation, to this to facilitate the subsequent collection and drying operation, and after a certain time of waste liquid discharge, through the separation tank is pushed to make its new separation cavity move below the liquid outlet pipe, and then guarantee the continuous filtration separation operation of waste liquid and clean, compared with the traditional independent filter equipment and single filter structure can effectively reduce the operation step, need not extra transfer, and the multi -station processing can avoid crystallization massive accumulation influence waste liquid and cause the effusion of waste liquid, improve the overall use quality, conveniently better use has the discharge filter, the good filter effect, the advantage of multi -site filtration.

Description

Technical Field

[0001] This utility model relates to the field of chemical reaction vessel technology, specifically to a vanadium precipitation reaction vessel. Background Technology

[0002] In the process of preparing metallic vanadium in current vanadium plants, a qualified vanadium-containing liquid is introduced into a reaction vessel, and then appropriate amounts of sulfuric acid and ammonium sulfate are added in sequence to carry out vanadium precipitation. After the reaction is completed, ammonium polyvanadate crystals will be generated inside the vessel. Finally, the ammonium polyvanadate is taken out, dried, and used as a raw material for preparing metallic vanadium.

[0003] After the vanadium precipitation process, existing reactors require the mixed liquid to be filtered through a filtration device to extract ammonium polyvanadate, which is relatively cumbersome and adds an extra step to the entire preparation process. Some devices, such as the reactor in the published patent application number CN201921389459.X, have a filter screen installed at the discharge port area for filtration. However, the filtration effect of a single filter screen is very limited. As more and more product deposits accumulate on the surface, it can lead to obstruction of waste liquid discharge and product accumulation on the outside of the reactor body, thereby affecting the overall filtration and separation as well as the subsequent collection effect. The performance is not ideal and there is room for improvement.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a vanadium precipitation reactor, which has the advantages of discharge filtration, good filtration effect, and multi-stage filtration, thereby solving the problems mentioned in the background technology.

[0006] (II) Technical Solution To achieve the advantages of discharge filtration, good filtration effect, and multi-stage filtration, the specific technical solution adopted by this utility model is as follows: A vanadium precipitation reactor includes a reactor body and a separation chamber. A liquid outlet pipe is installed at the bottom center of the reactor body. A slider is welded to the bottom of the liquid outlet pipe. The separation chamber is slidably connected to the outer periphery of the slider. Several sets of partitions are uniformly welded inside the separation chamber. A separation chamber is formed between each pair of partitions inside the separation chamber. A filter plate is installed at the center of the separation chamber. A liquid collection hopper is installed at the bottom of the filter plate. A drain pipe is connected to the bottom of the liquid collection hopper. The drain pipe passes through the separation chamber and connects to an external waste liquid collection structure.

[0007] Furthermore, guide grooves are symmetrically provided on both sides of the top of the separation box, and the guide grooves are connected to the slider.

[0008] Furthermore, support legs are symmetrically installed on both sides of the bottom of the vessel.

[0009] Furthermore, several sets of feed inlets are provided on both sides of the bottom of the vessel.

[0010] Furthermore, a motor is installed at the middle of the top of the vessel, and the output end of the motor passes through one side of the vessel and is connected to the stirring paddle.

[0011] Furthermore, the bottom of the liquid collection hopper is provided with a ramp, and the lowest point of the ramp is located at the feed position of the drain pipe.

[0012] Furthermore, a control valve is installed at the outlet pipe.

[0013] Furthermore, several sets of casters are installed at the bottom of the separation box.

[0014] (III) Beneficial Effects Compared with the prior art, the present invention provides a vanadium precipitation reactor, which has the following beneficial effects: This invention utilizes a separation tank connected to an outlet pipe to separate waste liquid from clean liquid after the reaction is complete. This facilitates subsequent collection and drying. After a certain period of waste liquid discharge, pushing the separation tank moves the new separation chamber below the outlet pipe, ensuring continuous filtration and separation of waste liquid and clean liquid. Compared to traditional independent filtration equipment and single filtration structures, this invention effectively reduces operational steps and eliminates the need for additional transfer. Furthermore, the multi-station processing prevents excessive crystal accumulation that could affect waste liquid discharge and overflow, improving overall quality and ease of use. It offers advantages such as efficient discharge filtration, good filtration effect, and multi-station filtration. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a vanadium precipitation reactor proposed in this utility model; Figure 2 This is a schematic diagram of the connection structure between the slider and the liquid outlet pipe of this utility model; Figure 3 This is a schematic diagram of the separation box of this utility model; Figure 4This is a schematic diagram of the connection structure between the liquid collection hopper and the liquid discharge pipe of this utility model.

[0017] In the picture: 1. Kettle body; 2. Feed inlet; 3. Motor; 4. Stirring paddle; 5. Guide trough; 6. Support leg; 7. Casters; 8. Drain pipe; 9. Separation box; 10. Baffle plate; 11. Sliding block; 12. Liquid collection hopper; 13. Control valve; 14. Filter plate; 15. Liquid outlet pipe; 16. Separation chamber. Detailed Implementation

[0018] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0019] According to an embodiment of the present invention, a vanadium precipitation reactor is provided.

[0020] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-4 As shown, a vanadium precipitation reactor according to an embodiment of the present invention includes a reactor body 1 and a separation tank 9. A liquid outlet pipe 15 is installed at the bottom center of the reactor body 1. A slider 11 is welded to the bottom of the liquid outlet pipe 15. The separation tank 9 is slidably connected to the outer periphery of the slider 11. Several sets of partitions 10 are evenly welded inside the separation tank 9. A separation chamber 16 is formed between each pair of partitions 10 inside the separation tank 9. A filter plate 14 is installed at the center of the separation chamber 16. A liquid collection hopper 12 is installed at the bottom of the filter plate 14. A drain pipe 8 is connected to the bottom of bucket 12. The drain pipe 8 passes through the separation tank 9 and connects to the external waste liquid collection structure. The vessel body 1 is a sealed container welded from stainless steel (with polished inner wall for corrosion resistance and suitability for the acidic environment of vanadium precipitation reaction). The bottom is conical (to facilitate the centralized discharge of materials after reaction), and the top is a flat cover (with a sealing gasket to ensure no leakage during reaction). Support legs 6 (solid steel columns with rust-proof surface treatment) are symmetrically welded to both sides of the bottom. Anti-slip feet (with a contact area ≥ 0.1m² with the ground) are welded to the bottom of the support legs 6. 2 It is fixed to the ground by expansion bolts (to resist vibration and displacement, the shaking amplitude of the reactor body 1 during the vanadium precipitation reaction is ≤1mm).

[0021] like Figure 1 , Figure 2 and Figure 3As shown, guide grooves 5 are symmetrically opened on both sides of the top of the separation box 9, and the guide grooves 5 are connected to the slider 11. A liquid outlet pipe 15 (stainless steel pipe, inner diameter adapted to the discharge volume) is welded to the center of the bottom of the vessel body 1. A control valve 13 (manual or pneumatic ball valve, controlling the start / stop of discharge and flow rate) is installed in the middle of the liquid outlet pipe 15. A slider 11 (rectangular steel block, polished surface) is welded to the bottom. The separation box 9 is a rectangular box body welded from stainless steel (open at the top). Guide grooves 5 are symmetrically milled on both sides of the top of the interior (with a clearance fit ≤1mm with the slider 11, chrome-plated surface for friction reduction). After the slider 11 is embedded in the guide groove 5, the separation box 9 can slide horizontally along the guide groove 5. The switching between different separation chambers 16 is as follows: Partition plates 10 (stainless steel plates, fully welded and sealed to the inner wall of separation chamber 9) are uniformly welded along the length of the separation chamber 9. The partition plates 10 divide the separation chamber 9 into 3-5 independent separation chambers 16 (16) (each group's volume is adapted to the single discharge volume). Filter plates 14 (stainless steel filter screens, pore size 50-100μm, adapted to the ammonium polyvanadate crystal particle size) are horizontally installed inside each separation chamber 16. The edges of the filter plates 14 are fixed to the inner wall of the separation chamber 16 by bolts (for easy disassembly and cleaning). A liquid-collecting funnel 12 (conical funnel, polished inner wall) is welded directly below the filter plates 14. The bottom of the liquid-collecting funnel 12... A welded drain pipe 8 (stainless steel pipe, penetrating the side wall of the separation tank 9, connected to the external waste liquid collection tank pipeline; a corrosion-resistant flexible hose can be installed at the connection to accommodate a certain degree of movement of the separation tank 9) is provided. The bottom of the liquid collection hopper 12 is sloped (inclination angle 30°-45°), with the lowest point of the slope aligned with the inlet of the drain pipe 8 (ensuring no residue of filtrate). The clearance fit between the slider 11 and the guide groove 5 ensures smooth sliding of the separation tank 9, and the separation chamber 16 can be precisely aligned with the outlet pipe 15 during sliding. When switching the separation chamber 16, the separation tank 9 is pushed so that the new separation chamber 16 is directly below the outlet pipe 15, continuing filtration. Integrated solid-liquid separation: separation... The tank 9 is directly connected to the outlet pipe 15, eliminating the intermediate step of "draining from the reaction vessel → transferring to the filter" (reducing material transfer loss by ≤5%) and improving separation efficiency; multi-position filtration prevents clogging: multiple separation chambers 16 are used alternately to avoid drainage obstruction or waste liquid overflow caused by clogging of a single set of filters (the clogging rate of traditional single-chamber structures is ≥50%, while this device reduces it to below 5%), ensuring a continuous and stable separation process; convenient crystallization recovery: the ammonium polyvanadate crystals intercepted by the filter plate 14 can be directly removed from the separation chamber 16 (simply open the top opening of the separation tank 9 and remove the filter plate 14), without the need for additional transfer (shortening the recovery operation time).

[0022] like Figure 1 As shown, support legs 6 are symmetrically installed on both sides of the bottom of the vessel body 1.

[0023] like Figure 1As shown, several sets of feed inlets 2 are provided on both sides of the bottom of the reactor body 1. The feed inlets 2 (flange connection, with valve) are symmetrically opened on both sides of the bottom of the reactor body 1 for introducing vanadium-containing qualified liquid, sulfuric acid, ammonium sulfate and other reaction raw materials (the spacing of the feed inlets 2 is adapted to the pipeline layout to avoid pipeline interference).

[0024] like Figure 1 As shown, a motor 3 is installed at the center of the top of the vessel body 1. The output end of the motor 3 passes through one side of the vessel body 1 and is connected to the stirring paddle 4. The motor 3 (a speed-regulating motor 3 with a gearbox, whose power is adapted to the stirring resistance) is fixed at the center of the top of the vessel body 1 by bolts. The output end of the motor 3 passes through the top of the vessel body 1 (leaking prevention by mechanical seal, sealing rating ≥ IP65) and is welded and fixed to the stirring paddle 4 (anchor or paddle type stirring blade, with a gap of ≤10mm between the blade and the bottom of the vessel body 1) inside the vessel body 1. The surface of the stirring paddle 4 is polished to prevent material adhesion. The rotation direction of the stirring paddle 4 is (clockwise / The stirring paddle (adjustable counterclockwise) is adapted to the conical bottom of the vessel body 1, which can turn the bottom material upwards (stirring speed 50-150r / min) to ensure that the vanadium-containing solution is fully mixed with sulfuric acid and ammonium sulfate (reaction uniformity ≥95%, avoiding incomplete local vanadium precipitation); the vessel body 1 provides a closed space for the vanadium precipitation reaction (adapted to the mild process conditions of the vanadium precipitation reaction), preventing raw material volatilization or impurities from entering (ensuring the purity of ammonium polyvanadate crystals %); efficient mixing: the stirring paddle 4 achieves forced mixing of raw materials, shortens the vanadium precipitation reaction time (30% shorter than without a stirring structure), and improves reaction efficiency.

[0025] like Figure 1 and Figure 4 As shown, the bottom of the liquid collection hopper 12 is equipped with a slope, and the lowest point of the slope is located at the feed position of the drain pipe 8. Filtration and drainage work together: the pore size of the filter plate 14 accurately intercepts ammonium polyvanadate crystals (retention rate ≥99%). The filtrate (waste liquid) falls into the liquid collection hopper 12 after passing through the filter screen and collects along the slope to the drain pipe 8 (no dead corners, residual amount of drain liquid ≤10mL / chamber), avoiding the retention of waste liquid that would cause crystal dissolution (ensuring crystal recovery rate); multi-position continuous filtration: 3-5 sets of separation chambers 16 are used alternately: when the filter plate 14 of a set of separation chambers 16 is blocked by crystals (such as a 50% decrease in drainage speed), the sliding separation box 9 switches to a new separation chamber 16 without the need to stop the machine for cleaning (an improvement over the single-chamber structure).

[0026] like Figure 1 As shown, a control valve 13 is installed at the outlet pipe 15. The control valve 13 ensures that there is no liquid leakage during operation.

[0027] like Figure 1As shown, several sets of casters 7 are installed at the bottom of the separator 9. Four sets of casters 7 (universal casters with brake mechanisms and wear-resistant rubber surfaces) are symmetrically installed at the four corners of the bottom of the separator 9. The casters are welded to the bottom of the separator 9 via bearing seats (verticality error ≤ 1°), and have a load-bearing capacity ≥ 500 kg (weight of separator 9 filled with liquid + weight of crystals). Mobility and positioning: The casters 7 make switching the separator 9 easier; after the brake mechanism is locked, the separator 9 has no displacement (ensuring precise alignment of the separation chamber 16 and the outlet pipe 15 during filtration, with no leakage); convenient switching: The casters 7 reduce the operational intensity of switching the separator 9; sedimentation... Vanadium reaction stage: Close the control valve 13 of the outlet pipe 15, and introduce vanadium-containing qualified liquid, sulfuric acid, and ammonium sulfate into the reactor 1 through the feed port 2. Start the motor 3 to drive the stirring paddle 4 to mix, and complete the vanadium precipitation reaction (generating ammonium polyvanadate crystals) in the reactor 1; Initial filtration stage: Push the separation box 9 so that the No. 1 separation chamber 16 is aligned with the outlet pipe 15, open the control valve 13, and the "crystallization + waste liquid" mixture in the reactor 1 flows into the No. 1 separation chamber 16 along the outlet pipe 15: the filter plate 14 intercepts the crystals, and the waste liquid passes through the filter screen → liquid collection hopper 12 → drain pipe 8 → external collection tank; Multi-position switching stage: After the filter plate 14 of the No. 1 separation chamber 16 is blocked (drainage... (Liquid flow slows down), close control valve 13, unlock the brake of separation chamber 9, push separation chamber 9 so that separation chamber 2 16 is aligned with the liquid outlet pipe 15, open control valve 13 to continue filtration; at the same time, the crystals in separation chamber 16 can be cleaned (without affecting continuous operation); crystallization recovery stage: after all separation chambers 16 have completed filtration, close control valve 13, remove filter plate 14, collect ammonium polyvanadate crystals (for subsequent drying), clean separation chamber 9 and set aside; integrated discharge filtration: reaction and separation are directly connected, eliminating the need for traditional independent filtration equipment (reducing equipment investment and floor space), simplifying the process flow; good filtration effect: filter plate 14 Precise crystallization is achieved, with waste liquid clarity ≥99% (no obvious suspended particles). Simultaneously, the liquid collection hopper 12 prevents waste liquid residue, improving crystallization recovery rate and waste liquid treatment efficiency. Multi-position continuous filtration: multiple separation chambers 16 are used alternately, achieving parallel "filtration-cleaning" (continuous operation rate ≥90%), avoiding production stoppages caused by single-chamber blockage (traditional equipment requires a 1-hour shutdown for cleaning after blockage, while this device does not). Through the synergistic design of the "reaction vessel body + multi-position sliding separation box 9," this device perfectly solves the pain points of traditional vanadium precipitation processes: "reaction and filtration separation, easy blockage of single chambers," making it suitable for the efficient preparation and recovery of ammonium polyvanadate crystals.

[0028] Working Principle: In actual use, personnel can introduce vanadium-containing qualified liquid into the reactor, and then add appropriate amounts of sulfuric acid and ammonium sulfate to precipitate vanadium. After the reaction, ammonium polyvanadate crystals will be generated inside the reactor body 1. At this time, by pushing the separation tank 9, it can be moved along the liquid outlet pipe 15, so that the bottom of the liquid outlet pipe 15 faces the separation chamber 16 inside the separation tank 9. Then, the control valve 13 is opened, and the reaction waste liquid and clean liquid inside the reactor body 1 will be discharged by gravity and liquid flow. The discharged substances will fall directly onto the filter plate 14 inside the separation chamber 16, and then solid-liquid separation is achieved through the filter holes on the filter plate 14. The reaction waste liquid will pass through the filter plate 14 and fall into the liquid collection hopper 12 below, and then flow along the liquid collection hopper 12. The waste liquid is discharged through the drain pipe 8 for convenient subsequent processing, while the crystals remain on the filter plate 14 for easy collection and drying. As the reaction waste liquid is continuously discharged, the crystals carried along will gradually fill the filter plate 14. At this time, by pushing the separation box 9, its new separation chamber 16 can be moved below the outlet pipe 15, thereby ensuring the continuous filtration and separation of waste liquid and clean liquid. Compared with traditional independent filtration equipment and single filtration structure, it can effectively reduce operation steps and eliminate the need for additional transfer. At the same time, multi-station processing can avoid the large accumulation of crystals affecting the discharge of waste liquid and causing waste liquid overflow, improving the overall quality of use and facilitating better use. The device as a whole has the advantages of discharge filtration, good filtration effect, and multi-station filtration.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vanadium precipitation reactor, comprising a reactor body (1) and a separation tank (9), characterized in that, A liquid outlet pipe (15) is installed at the middle of the bottom of the vessel body (1). A slider (11) is welded to the bottom of the liquid outlet pipe (15). A separation box (9) is slidably connected to the outer periphery of the slider (11). Several sets of partitions (10) are evenly welded inside the separation box (9). A separation chamber (16) is opened between each pair of partitions inside the separation box (9). A filter plate (14) is installed at the middle of the separation chamber (16). A liquid collection hopper (12) is installed at the bottom of the filter plate (14). A drain pipe (8) is connected to the bottom of the liquid collection hopper (12). The drain pipe (8) passes through the separation box (9) and is connected to the external waste liquid collection structure.

2. The vanadium precipitation reactor according to claim 1, characterized in that, The separation box (9) has guide grooves (5) symmetrically opened on both sides of the top of the interior, and the guide grooves (5) are connected to the slider (11).

3. The vanadium precipitation reactor according to claim 1, characterized in that, Support legs (6) are symmetrically installed on both sides of the bottom of the vessel body (1).

4. The vanadium precipitation reactor according to claim 1, characterized in that, The bottom of the vessel (1) is provided with several sets of feed inlets (2) on both sides.

5. A vanadium precipitation reactor according to claim 1, characterized in that, A motor (3) is installed at the middle of the top of the vessel body (1), and the output end of the motor (3) passes through one side of the vessel body (1) and is connected to the stirring paddle (4).

6. The vanadium precipitation reactor according to claim 1, characterized in that, The bottom of the liquid collection hopper (12) is provided with a slope, and the lowest point of the slope is located at the feed position of the drain pipe (8).

7. The vanadium precipitation reactor according to claim 1, characterized in that, A control valve (13) is installed at the outlet pipe (15).

8. A vanadium precipitation reactor according to claim 1, characterized in that, Several sets of casters (7) are installed at the bottom of the separation box (9).

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