A leaching chemical reaction kettle

Abstract

This utility model relates to the field of chemical separation equipment technology, and discloses a leaching chemical reactor, including a reactor body, a stirring assembly, and a filtration and reflux mechanism. The stirring assembly is installed on the top of the reactor body and drives the stirring shaft and stirring paddle to rotate. The filtration and reflux mechanism includes a filter cylinder disposed inside the reactor, which forms a reflux chamber with the inner wall of the reactor body. The bottom of the reflux chamber is connected to a reflux pump, and the outlet of the reflux pump is connected to an annular spray pipe penetrating the top of the reactor body, with the spray nozzle facing the inside of the filter cylinder. The reactor body is also equipped with a cleaning mechanism, including a scraper that rotates with the stirring shaft and elastically abuts against the inner wall of the filter cylinder, and an annular flushing pipe disposed in the reflux chamber. This utility model achieves repeated solid-liquid contact by constructing a closed-loop circulation circuit for the leaching solution, significantly improving leaching efficiency. Combined with a real-time wall scraping and deep flushing structure, it effectively solves the problems of micropore clogging and equipment cleaning dead corners.

Description

Technical Field

[0001] This utility model relates to the field of chemical separation equipment technology, and in particular to a leaching chemical reaction vessel. Background Technology

[0002] In industries such as chemical production, hydrometallurgy, and pharmaceutical extraction, leaching is a crucial process. Its main purpose is to use a specific liquid solvent to dissolve and separate the target components from solid raw materials. Traditional leaching operations are usually carried out in a general-purpose stirred reactor. The stirring paddle is driven by a motor to rotate, so that the solid powder put into the reactor mixes and comes into contact with the liquid solvent, thereby causing a chemical reaction or physical dissolution.

[0003] However, existing general-purpose reactors have obvious structural limitations when handling solid-liquid leaching processes. Although traditional stirring methods can drive the flow of macroscopic materials, at the microscopic level, solid particles often rotate synchronously with the liquid. The relative motion speed between solid and liquid is relatively small, resulting in slow renewal of the liquid film on the surface of solid particles. As the reaction proceeds, the solvent concentration surrounding the solid particles increases rapidly and tends to saturate. This greatly hinders the further diffusion and dissolution of the internal effective components, causing the reaction rate to decrease significantly over time.

[0004] More importantly, existing reactors lack a real-time circulation mechanism for the leachate. During the reaction, the solvent is usually in a stagnant state or only undergoes simple circular motion, making it difficult to repeatedly flush and rinse the solid raw materials. This results in uneven solvent utilization within the reaction system, often leading to localized over-reaction and incomplete overall leaching. This not only prolongs the production cycle but also results in a higher residue of effective components in the raw materials, making it impossible to achieve the ideal leaching rate and increasing the company's production costs.

[0005] Therefore, this invention proposes a leaching chemical reaction vessel to address the shortcomings of the prior art. Utility Model Content

[0006] To overcome the above deficiencies, this utility model provides a leaching chemical reaction vessel, which aims to improve the problem in some existing reaction vessels that, during solid-liquid leaching operations, suffer from insufficient contact between solid raw materials and solvents due to the lack of an effective liquid circulation spraying mechanism.

[0007] This utility model provides a leaching chemical reaction vessel, including: a reaction vessel body, a stirring assembly, and a filtration and reflux mechanism. A stirring motor is fixedly installed on the top of the reaction vessel body, and the stirring motor drives and connects to a stirring shaft, which extends into the interior of the reaction vessel body. The filtration and reflux mechanism includes a filter cylinder disposed in the center of the interior of the reaction vessel body.

[0008] The outer wall of the filter cylinder and the inner wall of the reactor body define a reflux cavity, which forms the intermediate area where the leachate collects.

[0009] Furthermore, the reflux chamber, the reflux pump, and the annular spray pipe are connected by specific pipelines to form a circulation loop. Specifically, the bottom of the reflux chamber is connected to reflux pipe one, reflux pipe one is connected to the inlet end of the reflux pump through a flange, the outlet end of the reflux pump is connected to reflux pipe two, and the end of reflux pipe two away from the reflux pump passes through the top of the reactor body and is fixedly connected to the annular spray pipe. The annular spray pipe is fixed above the filter cylinder by a bracket, and multiple spray nozzles are evenly fixed at the bottom of the annular spray pipe, with the spray nozzles facing the inside of the filter cylinder, so that the liquid in the reflux chamber can be drawn out and atomized and sprayed back into the filter cylinder.

[0010] Preferably, it also includes a cleaning mechanism, which includes a filter cleaning component. The filter cleaning component is provided with a fixed seat fixedly connected to the middle region of the stirring shaft. The fixed seat is slidably connected to a connecting rod. The end of the connecting rod away from the fixed seat is fixedly connected to a scraper through a connecting block. The scraper abuts against the inner wall of the filter cylinder to scrape the inner wall while stirring.

[0011] Preferably, the fixed base is provided with a compression spring inside, and the two ends of the compression spring abut against the inner wall of the sliding cavity of the fixed base and the end face of the connecting rod, respectively, and the connecting rod is pushed outward by the preload of the spring.

[0012] Preferably, the cleaning mechanism further includes a vessel rinsing assembly, which includes an annular rinsing pipe fixed in the reflux chamber by a bracket. Multiple rinsing nozzles are fixed at the bottom of the annular rinsing pipe, and the rinsing nozzles are respectively directed toward the inner wall of the reactor and the outer wall of the filter cartridge, thereby achieving bidirectional rinsing of the two walls of the reflux chamber.

[0013] Preferably, the vessel rinsing assembly is also equipped with an independent power and conveying structure, including a rinsing pump and a rinsing inlet pipe. The outlet end of the rinsing pump is connected to the rinsing inlet pipe, and the end of the rinsing inlet pipe away from the rinsing pump passes through the top of the reactor body and is fixedly connected to the annular rinsing pipe.

[0014] Preferably, the bottom of the filter cylinder passes through the bottom of the reactor body and is connected to the discharge port.

[0015] Preferably, the bottom of the reflux chamber is connected to the liquid outlet, and the position of the liquid outlet is lower than the microporous area of ​​the side wall of the filter cartridge.

[0016] Preferably, the stirring assembly further includes a stirring paddle fixedly connected to the bottom end of the stirring shaft, the stirring paddle being located inside the bottom side of the filter cylinder.

[0017] Preferably, the bottom of the reactor body is fixedly connected to a reactor body support foot to provide stable support.

[0018] This utility model has the following beneficial effects:

[0019] 1. This utility model solves the problems of insufficient solid-liquid contact, low leaching rate, and low raw material utilization in traditional leaching reactions by setting a filter cylinder inside the reaction vessel and forming a reflux chamber, and constructing a closed-loop circulation system with an external reflux pump and a ring spray pipe at the top. It achieves the technical effect of repeatedly circulating the leachate and atomizing it back into the filter cylinder, significantly increasing the frequency of solid-liquid contact, and improving the efficiency of the leaching reaction.

[0020] 2. This utility model solves the problem that solid particles or filter cake easily adhere to the surface of the filter medium during the leaching reaction, causing micropore blockage and reduced filtration efficiency. It utilizes the elastic force of the compression spring to keep the scraper in close contact with the inner wall of the filter cylinder and rotate synchronously with the stirring shaft. It achieves the technical effect of scraping off the inner wall deposits in real time while stirring the reaction, keeping the filter channel unobstructed, and ensuring the continuous and stable solid-liquid separation process.

[0021] 3. This utility model solves the problem of the difficulty in manually cleaning the interlayer space between the inner wall of the reactor and the outer wall of the filter cylinder, which is prone to the accumulation of reaction residues and cross-contamination, by setting a vessel body flushing component inside the reflux chamber and using an annular flushing pipe in conjunction with flushing nozzles facing different directions. It achieves the technical effect of using high-pressure water flow to perform all-round automated deep flushing of the hidden reflux chamber area and ensure the cleanliness and hygiene of the equipment. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of a leaching chemical reaction vessel proposed in this utility model;

[0023] Figure 2 This is a schematic diagram of the filtration and reflux mechanism of a leaching chemical reactor proposed in this utility model;

[0024] Figure 3 This is a schematic diagram of the cleaning mechanism for a leaching chemical reactor proposed in this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of a filtration and cleaning component for a leaching chemical reactor proposed in this utility model.

[0026] Legend:

[0027] 1. Reactor body; 2. Reactor body support legs;

[0028] 3. Mixing assembly; 31. Mixing motor; 32. Mixing shaft; 33. Mixing paddle;

[0029] 4. Filter reflux mechanism; 41. Filter cartridge; 42. Reflux chamber; 43. Reflux pipe one; 44. Reflux pump; 45. Reflux pipe two; 46. Annular spray pipe; 47. Spray nozzle;

[0030] 5. Cleaning mechanism; 51. Filter cleaning assembly; 511. Mounting base; 512. Connecting rod; 513. Compression spring; 514. Connecting block; 515. Scraper blade;

[0031] 52. Reactor body rinsing assembly; 521. Rinsing pump; 522. Rinsing inlet pipe; 523. Annular rinsing pipe; 524. Rinsing nozzle;

[0032] 6. Discharge port; 7. Liquid outlet. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Example:

[0035] Reference Figures 1 to 4 This utility model provides a leaching chemical reaction vessel, which aims to solve the structural defects in the prior art, such as insufficient solid-liquid contact leading to low leaching rate, easy clogging of the filter structure, and difficulty in automated deep cleaning.

[0036] like Figure 1 and Figure 2 As shown, a leaching chemical reactor includes a reactor body 1, reactor body support legs 2 fixedly connected to the outer side of the bottom of the reactor body 1, a stirring assembly 3 installed on the top of the reactor body 1, and a filter reflux mechanism 4 disposed inside the reactor body 1. The number of reactor body support legs 2 is preferably three or four, which are evenly distributed and welded to the outer circumference of the bottom of the reactor body 1 to provide stable support for the overall equipment. The reactor body 1 serves as a closed container for the reaction to take place, and provides space for reaction and separation inside.

[0037] The stirring assembly 3 is fixedly installed at the center of the top of the reactor body 1 to provide hybrid power for the reaction materials. The stirring assembly 3 mainly consists of a stirring motor 31 and a stirring shaft 32. The stirring motor 31 is fixedly connected to the upper end face of the reactor body 1 by bolts. The output shaft of the stirring motor 31 is connected to the upper end of the stirring shaft 32 by a coupling. The stirring shaft 32 passes through the top sealing cover of the reactor body 1 vertically and extends into the internal cavity of the reactor body 1. The bottom end of the stirring shaft 32 is connected to a stirring paddle 33 by a key or bolts. The stirring paddle 33 is located in the bottom layer area inside the reactor body 1 and is used to stir the solid precipitate at the bottom when rotating to prevent caking and promote solid-liquid mixing.

[0038] A filter cylinder 41 of the filtration and reflux mechanism 4 is fixedly installed in the center of the reactor body 1. The filter cylinder 41 has a cylindrical structure and several micropores or a filter screen is provided on the side wall to block solid particles from passing through and allow leachate to permeate. There is a gap between the outer wall surface of the filter cylinder 41 and the inner wall surface of the reactor body 1, thereby defining an annular reflux cavity 42 between the two. The reflux cavity 42 is used to collect the leachate after passing through the filter cylinder 41.

[0039] The bottom seal of the filter cylinder 41 passes through the bottom surface of the reactor body 1 and extends to the outside. The bottom flange of the filter cylinder 41 located on the outside is connected to the discharge port 6, which is used to discharge solid waste after the reaction. The side wall of the bottom of the reflux chamber 42 is connected to the liquid outlet 7, which is used to discharge the leachate that has finally enriched the target product. The liquid outlet 7 is located vertically below the microporous area at the lowest point of the side wall of the filter cylinder 41. By using the principle of gravity flow guidance, all the leachate passing through the filter cylinder 41 can converge and flow to the liquid outlet 7, avoiding the liquid volume to remain at the bottom of the reflux chamber 42 and causing residue.

[0040] The side wall at the bottom of the reflux chamber 42 is also connected to a reflux pipe 43. The end of the reflux pipe 43 away from the reflux chamber 42 is connected to the input end of the reflux pump 44 through a flange. The reflux pump 44 serves as the power source for liquid circulation. The output end of the reflux pump 44 is connected to a second reflux pipe 45. The second reflux pipe 45 extends upward along the outside of the reactor body 1 and enters the interior from the top of the reactor body 1. The end of the second reflux pipe 45 located inside the reactor body 1 is connected to a fixed annular spray pipe 46.

[0041] The annular spray pipe 46 is horizontally fixed above the filter cylinder 41 by a connecting bracket. Multiple spray nozzles 47 are evenly distributed and connected on the bottom surface of the annular spray pipe 46. The water outlet direction of the spray nozzles 47 is towards the inside of the filter cylinder 41. They are used to atomize the leachate pumped up by the return pump 44 and spray it evenly back into the filter cylinder 41, thereby realizing the circulation spraying of the leachate and allowing the liquid to come into repeated contact with the solid raw material.

[0042] It also includes a cleaning mechanism 5, which forms a specific structural fit and connection relationship with the stirring assembly 3 and the filter reflux mechanism 4. The cleaning mechanism 5 is composed of a filter cleaning assembly 51 set on the stirring shaft 32 and a vessel rinsing assembly 52 set in the reflux chamber 42. The two respectively play a role in different cleaning areas.

[0043] Reference Figure 3 and Figure 4 The filter cleaning assembly 51 is fixedly connected to the stirring shaft 32 in the middle area inside the filter cylinder 41 and rotates synchronously with the stirring shaft 32. It is used to mechanically scrape and clean the inner wall of the filter cylinder 41. The filter cleaning assembly 51 includes a fixed seat 511, a connecting rod 512, a compression spring 513, a connecting block 514, and a scraper 515. The fixed seat 511 has a block structure with a through hole in the center and is fixedly sleeved on the outer wall of the stirring shaft 32 by a key connection or a set screw.

[0044] The side of the fixed base 511 has a sliding cavity in the horizontal direction. One end of the connecting rod 512 is slidably inserted into the sliding cavity. The connecting rod 512 can reciprocate linearly in the radial direction within the sliding cavity. A compression spring 513 is provided inside the sliding cavity. The compression spring 513 is sleeved on the outer periphery of the part of the connecting rod 512 located in the sliding cavity, or the compression spring 513 directly abuts against the end face of the connecting rod 512 and the bottom inner wall of the sliding cavity. The elastic restoring force of the compression spring 513 always gives the connecting rod 512 a tendency to push outward.

[0045] The end of the connecting rod 512 that is away from the fixed seat 511 and extends out of the sliding cavity is fixedly connected to the connecting block 514 by thread or welding. A scraper 515 is fixedly installed on the outer surface of the connecting block 514. The scraper 515 is usually made of a wear-resistant and flexible material, such as polytetrafluoroethylene or stainless steel spring sheet. Under the pre-tightening thrust of the compression spring 513, the connecting rod 512 drives the connecting block 514 and the scraper 515 to move outward, so that the outer edge of the scraper 515 fits tightly against the inner wall surface of the filter cylinder 41. When the stirring motor 31 drives the stirring shaft 32 to rotate, the fixed seat 511 rotates accordingly, thereby driving the scraper 515 to make a circular motion along the inner wall of the filter cylinder 41, continuously scraping off the filter cake layer or solid particles attached to the microporous surface of the inner wall of the filter cylinder 41.

[0046] The cleaning mechanism 5 also includes a vessel rinsing assembly 52, which mainly consists of a rinsing pump 521, a rinsing inlet pipe 522, an annular rinsing pipe 523, and a rinsing nozzle 524. The annular rinsing pipe 523 is horizontally fixed in the internal space of the reflux chamber 42 by a bracket, that is, located between the inner wall of the reactor body 1 and the outer wall of the filter cartridge 41. The installation height of the annular rinsing pipe 523 is preferably set in the upper region of the reflux chamber 42. One end of the rinsing inlet pipe 522 passes through the top sealing cover of the reactor body 1 and extends downward to communicate with the annular rinsing pipe 523. The end of the rinsing inlet pipe 522 located outside the reactor body 1 is connected to the output end of the rinsing pump 521.

[0047] The bottom surface of the annular flushing pipe 523 is evenly distributed and connected with multiple flushing nozzles 524. In order to achieve all-round coverage cleaning, the water outlet direction of the flushing nozzles 524 is specially designed. The water outlet of some of the flushing nozzles 524 faces the inner wall of the reactor body 1, and the water outlet of other part of the flushing nozzles 524 faces the outer wall of the filter cylinder 41. In this way, the high-pressure water flow can be used to flush the two side walls of the return cavity 42 at the same time, and thoroughly remove the deposited dirt or residue.

[0048] The implementation principle of this application embodiment is as follows: When carrying out the leaching reaction operation, the required solid raw materials and leaching agent are first loaded into the filter cylinder 41 through the feed port at the top of the reactor body 1. The stirring motor 31 is started, and the stirring motor 31 drives the stirring shaft 32 and the stirring paddle 33 at the bottom to rotate, which drives the material inside the filter cylinder 41 to be vigorously stirred and mixed, accelerating the contact and reaction between the solid and liquid phases.

[0049] During the reaction, the leachate containing the target component permeates through the micropores on the side wall of the filter cylinder 41 into the outer reflux chamber 42. At this time, the reflux pump 44 is started. The reflux pump 44 continuously extracts the leachate accumulated at the bottom of the reflux chamber 42 through the reflux pipe 1 43 and delivers it to the top annular spray pipe 46 through the reflux pipe 2 45. The high-pressure leachate entering the annular spray pipe 46 is atomized into fine droplets through the bottom spray nozzle 47 and sprayed evenly back into the filter cylinder 41. These refluxed liquids come into contact with and mix with the unreacted solid raw materials again, thereby realizing the closed-loop circulation spraying of the leachate, which significantly improves the leaching efficiency and raw material utilization rate.

[0050] While the mixture is being stirred, the filter cleaning assembly 51 fixed on the stirring shaft 32 rotates synchronously. Due to the pre-applied elastic force of the compression spring 513, the scraper 515 always remains in close contact with the inner wall of the filter cylinder 41. As the scraper 515 moves circumferentially, the filter cake layer or solid particles attached to the inner wall of the filter cylinder 41 are scraped off in real time and remixed into the slurry, thereby effectively preventing micropore blockage and ensuring that the leachate can continuously and smoothly penetrate into the return chamber 42.

[0051] When the reaction is complete and the equipment needs to be cleaned, after the reaction residue and waste liquid are discharged, the vessel flushing assembly 52 is started. The flushing pump 521 pumps the cleaning liquid into the annular flushing pipe 523, and sprays it out in a fan shape with high pressure through the flushing nozzle 524 to both sides, which powerfully flushes the inner wall of the reaction vessel 1 and the outer wall of the filter cylinder 41, thoroughly removing the residue in the return chamber 42, and realizing the automated deep cleaning of the equipment.

[0052] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 leaching chemical reactor, comprising a reactor body (1), a stirring assembly (3), and a filtration and reflux mechanism (4); Its features are, A stirring motor (31) is fixedly installed on the top of the reactor body (1). The stirring motor (31) drives a stirring shaft (32), which extends into the interior of the reactor body (1). The filtration reflux mechanism (4) includes a filter cylinder (41) located in the center of the interior of the reactor body (1), and a reflux cavity (42) is formed between the outer wall of the filter cylinder (41) and the inner wall of the reactor body (1). The bottom of the reflux chamber (42) is connected to reflux pipe one (43), reflux pipe one (43) is connected to the inlet end of reflux pump (44) through a flange, and the outlet end of reflux pump (44) is connected to reflux pipe two (45); The end of the second reflux pipe (45) away from the reflux pump (44) is inserted into the top of the reactor body (1) and fixedly connected to the annular spray pipe (46). The annular spray pipe (46) is fixed above the filter cylinder (41) by a bracket, and multiple spray nozzles (47) are evenly fixed at the bottom of the annular spray pipe (46).

2. The leaching chemical reaction vessel according to claim 1, characterized in that, It also includes a cleaning mechanism (5), which includes a filter cleaning component (51); The filter cleaning assembly (51) includes a fixed seat (511) fixedly connected to the middle region of the stirring shaft (32), and the fixed seat (511) is slidably connected to the connecting rod (512); The end of the connecting rod (512) away from the fixed base (511) is fixedly connected to the scraper (515) via the connecting block (514), and the scraper (515) abuts against the inner wall of the filter cylinder (41).

3. The leaching chemical reaction vessel according to claim 2, characterized in that, The fixed base (511) is provided with a compression spring (513) inside. The two ends of the compression spring (513) abut against the inner wall of the sliding cavity of the fixed base (511) and the end face of the connecting rod (512), respectively.

4. The leaching chemical reaction vessel according to claim 1, characterized in that, It also includes a cleaning mechanism (5), which includes a vessel rinsing assembly (52); The reactor body flushing assembly (52) includes an annular flushing pipe (523) fixed in the reflux chamber (42) by a bracket. Multiple flushing nozzles (524) are fixed at the bottom of the annular flushing pipe (523). The flushing nozzles (524) are respectively facing the inner wall of the reactor body (1) and the outer wall of the filter cylinder (41).

5. A leaching chemical reaction vessel according to claim 4, characterized in that, The vessel rinsing assembly (52) also includes a rinsing pump (521) and a rinsing inlet pipe (522); The outlet end of the flushing pump (521) is connected to the flushing inlet pipe (522), and the end of the flushing inlet pipe (522) away from the flushing pump (521) is inserted into the top of the reactor body (1) and then fixedly connected to the annular flushing pipe (523).

6. The leaching chemical reaction vessel according to claim 1, characterized in that, The bottom of the filter cylinder (41) passes through the bottom of the reactor body (1) and is connected to the discharge port (6).

7. The leaching chemical reaction vessel according to claim 1, characterized in that, The bottom of the reflux chamber (42) is connected to the liquid outlet (7).

8. A leaching chemical reaction vessel according to claim 1, characterized in that, The stirring assembly (3) also includes a stirring paddle (33) fixedly connected to the bottom end of the stirring shaft (32), and the stirring paddle (33) is located inside the filter cylinder (41).

9. A leaching chemical reaction vessel according to claim 1, characterized in that, The bottom of the reactor body (1) is fixedly connected to the reactor body support foot (2).

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