Efficient leaching device for fly ash containing valuable elements

Abstract

The utility model discloses an efficient leaching device for fly ash containing valuable elements, which relates to the technical field of fly ash treatment and comprises a reaction kettle, a liquid outlet is arranged at the lower end of the reaction kettle, a cover plate is arranged at the upper end of the reaction kettle, a lifting component is arranged between the reaction kettle and the cover plate, and a heating component is arranged in the reaction kettle. A detachable filtering barrel is arranged at the lower end of the cover plate, a stirring assembly is arranged in the detachable filtering barrel, and an acid liquor supply assembly is arranged on the cover plate. According to the utility model, the heating assembly and the stirring assembly are matched, the temperature effect, the spiral stirring blades and the open holes are utilized to enhance the up-down convection of mixed liquor, and the L-shaped scraper in the stirring assembly cleans the barrel wall of the detachable filter barrel, so that the reaction rate of acid liquor and fly ash is improved together; and the acid liquor repeatedly and fully reacts with newly added fly ash, so that the utilization rate of the acid liquor is improved, and the subsequent neutralization cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of fly ash treatment technology, specifically a high-efficiency leaching device for fly ash containing valence elements. Background Technology

[0002] Fly ash is a solid waste product from coal combustion. Its enormous quantity and long-term storage occupy vast amounts of land, causing serious environmental pollution. However, fly ash contains abundant valuable components such as alumina, giving it high resource recycling value. The traditional method of producing crystalline aluminum chloride from bauxite is facing challenges of rising costs and resource sustainability due to the increasing scarcity of bauxite resources. Therefore, developing technology to produce crystalline aluminum chloride from fly ash can not only achieve the resource utilization of fly ash and reduce environmental pollution, but also lower the production cost of crystalline aluminum chloride, resulting in significant economic and environmental benefits.

[0003] However, existing acid leaching equipment typically mixes fly ash directly with the acid leaching solution and accelerates the reaction using a stirring assembly. The resulting solution is then filtered through a filter before further processing. This method has several drawbacks. Firstly, it results in low utilization efficiency of the acid leaching solution, with a large amount failing to fully participate in the reaction. Secondly, the large amount of unreacted acid remaining in the solution necessitates a relatively higher dosage of alkaline neutralizing agent during post-reaction processing, increasing processing costs and generating more waste residue from the neutralization reaction.

[0004] Based on this, a highly efficient leaching device for fly ash containing valence elements is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0005] The purpose of this invention is to provide a highly efficient leaching device for fly ash containing valence elements, so as to solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A high-efficiency leaching device for fly ash containing valence elements includes a reactor, a liquid outlet at the lower end of the reactor, a cover plate at the upper end of the reactor, a lifting assembly between the reactor and the cover plate, a heating assembly inside the reactor, a detachable filter barrel at the lower end of the cover plate, a stirring assembly inside the detachable filter barrel, and an acid supply assembly on the cover plate.

[0008] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0009] In one alternative: the cover plate is provided with an ash inlet, and an acid inlet is provided on one side of the ash inlet. Two connecting blocks are symmetrically provided on both sides of the cover plate, and a connecting seat is provided at the lower end of the cover plate. The connecting seat is provided with a slot.

[0010] In one alternative: the lifting assembly includes mounting seats symmetrically arranged on both sides of the reactor, each mounting seat is equipped with a cylinder, the output end of the cylinder is equipped with a push rod, and the upper end of the push rod is fixedly connected to a connecting block.

[0011] In one alternative: the heating assembly includes a cavity disposed in the side wall of the reactor, with an inlet and an outlet on one side of the cavity, the inlet being located below the outlet.

[0012] In one alternative: the detachable filter barrel is provided with filter holes evenly distributed on it, and the upper end of the detachable filter barrel is provided with a locking block that matches the locking slot.

[0013] In one alternative embodiment: the stirring assembly includes a rotating shaft rotatably connected to the cover plate, a motor is provided at the upper end of the rotating shaft, a spiral stirring blade is provided on the motor, an opening is provided on the spiral stirring blade, a mounting groove is provided at the lower end of the rotating shaft, a movable rod is slidably installed in the mounting groove, a spring is provided at the upper end of the movable rod, and two L-shaped scrapers are symmetrically provided at the lower end of the movable rod, the L-shaped scrapers simultaneously contacting the bottom and side wall of the detachable filter barrel.

[0014] In one alternative: the acid supply assembly includes an annular tube disposed at the lower end of the cover plate, the lower end of the annular tube having a spray hole, the upper end of the annular tube being connected to an acid inlet, and the upper end of the annular tube also being connected to a circulation assembly.

[0015] In one alternative embodiment: the circulation assembly includes a connecting hose disposed on one side of the reactor, the upper end of the connecting hose being connected to an annular pipe, the lower end of the connecting hose being connected to the interior of the reactor, and a liquid pump being provided on the connecting hose.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This invention utilizes the combination of heating and stirring components, taking advantage of temperature effects, spiral stirring blades and perforations to enhance the vertical convection of the mixture, and the cleaning effect of the L-shaped scraper in the stirring component on the wall of the detachable filter barrel. These factors work together to improve the reaction rate of acid and fly ash. Furthermore, through the circulation component, the acid is repeatedly and fully reacted with newly added fly ash, thereby improving the utilization rate of the acid and reducing subsequent neutralization costs. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of one side of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure on the other side of this utility model.

[0020] Figure 3 This is a schematic diagram of the detachable filter barrel in this utility model.

[0021] Figure 4 This is a schematic diagram of the acid supply component in this utility model.

[0022] Figure reference numerals: 100, Reactor; 101, Liquid outlet; 200, Cover plate; 201, Ash inlet; 202, Acid inlet; 203, Connecting block; 204, Connecting seat; 205, Slot; 300, Lifting assembly; 301, Mounting base; 302, Cylinder; 303, Push rod; 400, Heating assembly; 401, Cavity; 402, Water inlet; 403, Water outlet; 500. Detachable filter canister; 501, filter hole; 502, locking block; 600, stirring assembly; 601, rotating shaft; 602, motor; 603, spiral stirring blade; 604, opening; 605, mounting groove; 606, movable rod; 607, spring; 608, L-shaped scraper; 700, acid supply assembly; 701, annular pipe; 702, spray hole; 703, connecting hose; 704, liquid pump. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] In one embodiment, such as Figures 1-4 As shown, a high-efficiency leaching device for fly ash containing valence elements includes a reactor 100, a liquid outlet 101 at the lower end of the reactor 100, a cover plate 200 at the upper end of the reactor 100, a lifting assembly 300 between the reactor 100 and the cover plate 200, a heating assembly 400 inside the reactor 100, a detachable filter barrel 500 at the lower end of the cover plate 200, a stirring assembly 600 inside the detachable filter barrel 500, and an acid supply assembly 700 on the cover plate 200. In use, fly ash is added to the detachable filter barrel 500, and acid leaching solution is added to the detachable filter barrel 500 through the acid supply assembly 700, so that the acid leaching solution reacts with the fly ash. At the same time, the heating assembly 400 heats the mixture, and the stirring assembly 600 stirs the mixture to accelerate the reaction. After the reaction is completed, the acid leaching solution is discharged from the liquid outlet 101 for subsequent processing.

[0025] In one embodiment, such as Figure 2 and Figure 3As shown, the cover plate 200 is provided with an ash inlet 201, and an acid inlet 202 is provided on one side of the ash inlet 201. Two connecting blocks 203 are symmetrically provided on both sides of the cover plate 200. A connecting seat 204 is provided at the lower end of the cover plate 200. A slot 205 is provided on the connecting seat 204. The slot 205 is matched and connected with the locking block 502 on the detachable filter barrel 500 to realize the stable installation and disassembly of the detachable filter barrel 500.

[0026] In one embodiment, such as Figure 2 As shown, the lifting assembly 300 includes mounting bases 301 symmetrically arranged on both sides of the reactor 100. A cylinder 302 is provided on the mounting base 301, and a push rod 303 is provided at the output end of the cylinder 302. The upper end of the push rod 303 is fixedly connected to the connecting block 203. By extending and retracting the cylinder 302, the push rod 303 can be driven to move up and down, thereby realizing the lifting and lowering of the cover plate 200 and the detachable filter barrel 500 and other components. This makes it convenient to lift the cover plate 200 after the reaction is completed and to clean or replace the detachable filter barrel 500.

[0027] In one embodiment, such as Figure 4 As shown, the heating assembly 400 includes a cavity 401 disposed in the side wall of the reactor 100. A water inlet 402 and a water outlet 403 are provided on one side of the cavity 401. The water inlet 402 is located below the water outlet 403. In use, an external hot water circulation pump is connected to the water inlet 402 and the water outlet 403 is connected to the return water tank to form a closed-loop heating system to heat the acid leaching solution in the reactor 100 and improve the reaction efficiency.

[0028] In one embodiment, such as Figure 3 As shown, the detachable filter canister 500 has filter holes 501 evenly distributed on it. The upper end of the detachable filter canister 500 is provided with a locking block 502, which matches the locking slot 205. Through the cooperation of the locking block 502 and the locking slot 205, the detachable filter canister 500 can be quickly installed and removed, making it convenient to clean or replace the filter canister.

[0029] In one embodiment, such as Figure 4As shown, the stirring assembly 600 includes a rotating shaft 601 rotatably connected to the cover plate 200. A motor 602 is mounted on the upper end of the rotating shaft 601, and a spiral stirring blade 603 is mounted on the motor 602. An opening 604 is provided on the spiral stirring blade 603. An installation groove 605 is provided on the lower end of the rotating shaft 601, and a movable rod 606 is slidably mounted within the installation groove 605. A spring 607 is mounted on the upper end of the movable rod 606, and two L-shaped scrapers 608 are symmetrically positioned on the lower end of the movable rod 606. The L-shaped scrapers 608 simultaneously contact the bottom and side walls of the detachable filter barrel 500. During use, the motor 602 drives the spiral stirring blade 603 to rotate, stirring the mixture inside the detachable filter barrel 500 to ensure sufficient contact and reaction between the fly ash and the acid leaching solution. Simultaneously, under the action of the spring 607, the movable rod 606 can scrape the bottom and side walls of the detachable filter barrel 500 to prevent fly ash from adhering to the inner wall of the filter barrel, thus affecting the reaction efficiency and filtration effect.

[0030] In one embodiment, such as Figure 4 As shown, the acid supply assembly 700 includes an annular pipe 701 located at the lower end of the cover plate 200. The lower end of the annular pipe 701 is provided with a spray hole 702. The upper end of the annular pipe 701 is connected to the acid inlet 202. A circulation assembly is also connected to the upper end of the annular pipe 701. The acid enters the annular pipe 701 through the acid inlet 202 and is then evenly sprayed from the spray hole 702 into the detachable filter tank 500, so that the acid can be fully mixed with the fly ash and the reaction effect can be improved.

[0031] In one embodiment, such as Figure 4 As shown, the circulation assembly includes a connecting hose 703 disposed on one side of the reactor 100. The upper end of the connecting hose 703 is connected to the annular pipe 701, and the lower end of the connecting hose 703 is connected to the interior of the reactor 100. A liquid pump 704 is provided on the connecting hose 703. The liquid pump 704 pumps the acid leaching solution after reaction in the reactor 100 back to the annular pipe 701 through the connecting hose 703, and then sprays it out from the nozzle 702, thereby realizing the recycling of the acid leaching solution, improving the utilization rate of the acid solution, and reducing the subsequent neutralization cost.

[0032] The above embodiments disclose a high-efficiency leaching device for fly ash containing valence elements. In use, fly ash containing valence elements is added to a detachable filter tank 500 through the ash inlet 201 on the cover plate 200. Then, acid leaching solution is added to the acid supply assembly 700 and the detachable filter tank 500 through the acid inlet 202. Next, an external hot water circulation pump is connected to the inlet 402, and a return water tank is connected to the outlet 403, forming a closed-loop heating system to uniformly heat the fly ash and acid leaching solution in the reactor 100. Simultaneously, the motor 602 of the stirring assembly 600 is started. Motor 602 drives spiral stirring blade 603 to rotate, stirring the mixture in the detachable filter barrel 500, so that fly ash and acid leaching solution can fully contact and react. During this process, the movable rod 606, under the action of spring 607, scrapes the bottom and side wall of the detachable filter barrel 500 through L-shaped scraper 608 to prevent fly ash from adhering and affecting the reaction efficiency. Then, the acid leaching solution in the reaction vessel 100 is pumped to the annular pipe 701 through connecting hose 703 by liquid pump 704, and then sprayed out from the spray hole 702 at the lower end of the annular pipe 701 to realize the recycling of acid leaching solution.

[0033] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A high-efficiency leaching device for fly ash containing valence elements, comprising a reaction vessel (100), wherein the reaction vessel (100) is provided with a liquid outlet (101) at its lower end, characterized in that, The upper end of the reactor (100) is provided with a cover plate (200), and a lifting assembly (300) is provided between the reactor (100) and the cover plate (200). A heating assembly (400) is provided inside the reactor (100). A detachable filter barrel (500) is provided at the lower end of the cover plate (200). A stirring assembly (600) is provided inside the detachable filter barrel (500). An acid supply assembly (700) is provided on the cover plate (200).

2. The high-efficiency leaching device for fly ash containing valence elements according to claim 1, characterized in that, The cover plate (200) is provided with an ash inlet (201), and an acid inlet (202) is provided on one side of the ash inlet (201). Two connecting blocks (203) are symmetrically provided on both sides of the cover plate (200). A connecting seat (204) is provided at the lower end of the cover plate (200), and a slot (205) is provided on the connecting seat (204).

3. The high-efficiency leaching device for fly ash containing valence elements according to claim 1, characterized in that, The lifting assembly (300) includes mounting bases (301) symmetrically arranged on both sides of the reactor (100). A cylinder (302) is provided on the mounting base (301). A push rod (303) is provided at the output end of the cylinder (302). The upper end of the push rod (303) is fixedly connected to the connecting block (203).

4. The high-efficiency leaching device for fly ash containing valence elements according to claim 1, characterized in that, The heating assembly (400) includes a cavity (401) disposed in the side wall of the reactor (100). The cavity (401) has an inlet (402) and an outlet (403) on one side, with the inlet (402) located below the outlet (403).

5. The high-efficiency leaching device for fly ash containing valence elements according to claim 1, characterized in that, The detachable filter barrel (500) is provided with filter holes (501) evenly distributed on it, and the upper end of the detachable filter barrel (500) is provided with a locking block (502), which matches the locking block (502) with the locking groove (205).

6. The high-efficiency leaching device for fly ash containing valence elements according to claim 1, characterized in that, The stirring assembly (600) includes a rotating shaft (601) rotatably connected to the cover plate (200). The upper end of the rotating shaft (601) is provided with a motor (602). The motor (602) is provided with a spiral stirring blade (603). The spiral stirring blade (603) is provided with an opening (604). The lower end of the rotating shaft (601) is provided with a mounting groove (605). A movable rod (606) is slidably installed in the mounting groove (605). The upper end of the movable rod (606) is provided with a spring (607). The lower end of the movable rod (606) is symmetrically provided with two L-shaped scrapers (608). The L-shaped scrapers (608) simultaneously contact the bottom and side wall of the detachable filter barrel (500).

7. The high-efficiency leaching device for fly ash containing valence elements according to claim 1, characterized in that, The acid supply assembly (700) includes an annular tube (701) disposed at the lower end of the cover plate (200), the lower end of the annular tube (701) is provided with a spray hole (702), the upper end of the annular tube (701) is connected to the acid inlet (202), and the upper end of the annular tube (701) is also connected to a circulation assembly.

8. The high-efficiency leaching device for fly ash containing valence elements according to claim 7, characterized in that, The circulation assembly includes a connecting hose (703) disposed on one side of the reactor (100). The upper end of the connecting hose (703) is connected to the annular pipe (701), and the lower end of the connecting hose (703) is connected to the interior of the reactor (100). A liquid pump (704) is provided on the connecting hose (703).

Images