Leaching device for preparing polyaluminum chloride from gasified slag

Abstract

The utility model relates to the field of leaching devices, in particular to a leaching device for preparing polyaluminum chloride from gasified slag, which comprises a base, a leaching agent storage tank and a composite leaching agent blending tank, according to the utility model, one side of the base is communicated with the leaching agent storage tank used for storing the leaching agent required for preparing the polyaluminum chloride, one side of the leaching agent storage tank is communicated with the composite leaching agent blending tank used for accurately blending the chemical leaching agent, and the center of the top end of the base is provided with the reaction kettle; a plurality of groups of ultrasonic transducers are annularly mounted outside the reaction kettle, a microwave generator located in the base is mounted in the center of the bottom end of the reaction kettle, the ultrasonic transducers are annularly mounted outside the reaction kettle, leaching is assisted by utilizing an ultrasonic cavitation effect, the microwave generator is mounted in the center of the bottom end, the reaction is accelerated through microwave radiation, and stirring is kept at the same time; the ultrasonic cavitation effect of the ultrasonic transducer can destroy the internal complex structure of the gasified slag, so that the aluminum element is easier to expose, and the microwave generator accelerates the reaction from the microcosmic level.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of leaching device, especially gasification slag preparation polyaluminum chloride's leaching device. BACKGROUND

[0002] The leaching device for preparing polyaluminum chloride from gasification slag is a device combination specially used for extracting aluminum elements from gasification slag to prepare polyaluminum chloride, which dissolves the aluminum components in the gasification slag into a solution through a series of physical and chemical processes, and forms polyaluminum chloride after subsequent treatment. With the development of energy chemical industry, gasification technology is widely used, and a large amount of gasification slag is produced. The gasification slag contains a certain amount of valuable metal elements such as aluminum. If it is discarded directly, not only the resources will be wasted, but also the environment will be under pressure. Therefore, a device capable of effectively recovering aluminum elements in gasification slag to prepare polyaluminum chloride is developed.

[0003] In the current leaching device for preparing polyaluminum chloride from gasification slag, most of the reaction kettles mainly rely on stirring to promote the leaching process. Purely relying on stirring, the effect of strengthening the contact between aluminum elements in the gasification slag and the leaching agent is relatively limited. On the one hand, in the face of gasification slag with complex composition and various structures, stirring is difficult to fully destroy the complex structure inside, so that part of the aluminum elements cannot be effectively exposed and reacted with the leaching agent, resulting in that the leaching efficiency is difficult to reach the ideal level.

[0004] Therefore, in view of the above problems in the current leaching device for preparing polyaluminum chloride from gasification slag, most of the reaction kettles only rely on stirring to promote leaching, but in the face of gasification slag with complex composition and various structures, stirring has limited effect on strengthening the contact between aluminum elements and leaching agent, and it is difficult to destroy the complex structure inside, so that part of the aluminum elements cannot effectively participate in the reaction, and the leaching efficiency is difficult to reach the expectation. A leaching device for preparing polyaluminum chloride from gasification slag can be designed, which installs an ultrasonic transducer outside the reaction kettle in a ring shape, uses ultrasonic cavitation effect to assist leaching, installs a microwave generator at the center of the bottom, accelerates the reaction through microwave radiation, and retains a stirring device, a first rotary shaft, an inclined blade turbine stirring blade and a servo motor. The ultrasonic cavitation effect of the ultrasonic transducer can destroy the complex structure inside the gasification slag, so that the aluminum elements are more easily exposed, and the microwave generator accelerates the reaction from the micro level. SUMMARY

[0005] In order to overcome the problem that in the current leaching device for preparing polyaluminum chloride from gasification slag, most of the reaction kettles only rely on stirring to promote leaching, but in the face of gasification slag with complex composition and various structures, stirring has limited effect on strengthening the contact between aluminum elements and leaching agent, and it is difficult to destroy the complex structure inside, so that part of the aluminum elements cannot effectively participate in the reaction, and the leaching efficiency is difficult to reach the expectation.

[0006] The utility model discloses a technical scheme for the leaching device for preparing polyaluminum chloride from gasification slag, which comprises a base, a leaching agent storage tank and a composite leaching agent mixing tank.

[0007] Preferably, first, the composite leaching agent is mixed in the composite leaching agent mixing tank, and various chemical reagents are mixed in the mixing tank according to the accurate proportion, and the mixture is fully mixed through the stirring mechanism in the mixing tank to form the composite leaching agent suitable for the leaching of the gasification slag. The prepared composite leaching agent flows into the leaching agent storage tank for storage. The leaching agent storage tank serves as a temporary storage tank to ensure a stable supply of the leaching agent. When the leaching reaction is needed, the composite leaching agent in the leaching agent storage tank is transported to the reaction kettle at the top center of the base. In the reaction kettle, the gasification slag and the composite leaching agent start to react. At this time, the multiple sets of ultrasonic transducers installed at the outer annular position of the reaction kettle start to work. The ultrasonic transducers convert electrical energy into ultrasonic energy and emit ultrasonic waves to the reaction system in the reaction kettle. The ultrasonic waves produce cavitation effect and mechanical vibration in the liquid to promote the mixing and reaction of the gasification slag and the leaching agent. At the same time, the microwave generator located at the bottom center of the reaction kettle and inside the base also starts to work. The microwave generator generates microwaves, which penetrate the bottom of the reaction kettle and act on the gasification slag and the leaching agent in the kettle to make the molecules in the system vibrate and rub quickly to produce heat, thereby accelerating the chemical reaction process from the microscopic level and promoting the dissolution of aluminum elements in the gasification slag, so as to realize the leaching process of preparing polyaluminum chloride from the gasification slag.

[0008] Preferably, two sets of struts are symmetrically installed at the top end of the base near the side edges, and the top ends of the two sets of struts are sleeved with sheaths. The top ends of the two sets of sheaths are installed with load-bearing arms, and the load-bearing arms are installed with mounting plates outside.

[0009] Preferably, a primary rotating shaft is installed at the center of the mounting plate, and the bottom end of the primary rotating shaft is sleeved with a diagonal blade turbine stirring blade. A servo motor is installed at the top end of the mounting plate at one end of the primary rotating shaft, and the output end of the servo motor is connected with the primary rotating shaft.

[0010] Preferably, a mounting bracket is installed on the inner wall of the reaction kettle, and a ph sensor is installed inside the mounting bracket. A water outlet hole is formed at the bottom end of the reaction kettle, and a control console is installed at the top end of the base away from the struts.

[0011] Preferably, two sets of connecting pipes are installed at the two sides of the leaching agent storage tank, and a circulating pump is installed at one end of the two sets of connecting pipes outside. A flow valve is installed at the other end of the two sets of connecting pipes outside.

[0012] As preferred, four groups of bottom columns are installed at the corners around the bottom end of the composite leaching agent preparation tank, fixed plates are installed at the bottom ends of the four groups of bottom columns, and connecting holes are formed through the outside of the composite leaching agent preparation tank.

[0013] As preferred, the composite leaching agent preparation tank is hollow, a secondary rotating shaft is installed through the inside center of the composite leaching agent preparation tank, and a paddle is sleeved on the top end of the secondary rotating shaft.

[0014] As preferred, a rotating motor is installed at one end of the secondary rotating shaft at the bottom end of the composite leaching agent preparation tank, the output end of the rotating motor is connected with the secondary rotating shaft, and two groups of heating plates are installed at the bottom end of the composite leaching agent preparation tank on both sides of the rotating motor.

[0015] The beneficial effects of the utility model are as follows: the ultrasonic transducer is installed outside the reaction kettle in a ring shape, the ultrasonic cavitation effect is used to assist leaching, the microwave generator is installed at the bottom center, the reaction is accelerated through microwave radiation, the first-stage rotating shaft, the inclined-blade turbine stirring blade and the servo motor are retained, the ultrasonic cavitation effect of the ultrasonic transducer can destroy the complex structure inside the gasified slag, the aluminum element is more easily exposed, the microwave generator accelerates the reaction from the microscopic level, compared with simple stirring, the contact efficiency and the reaction rate of the aluminum element and the leaching agent are greatly improved, the heating plate can accelerate the dissolution of specific components, the performance of the leaching agent is optimized, the circulation system improves the utilization rate of the leaching agent and reduces the cost, and the existing device uses the leaching agent only once, which is seriously wasted. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The overall structure schematic diagram of the leaching device for preparing polyaluminum chloride from gasified slag is shown.

[0017] Figure 2 The mounting plate structure schematic diagram of the leaching device for preparing polyaluminum chloride from gasified slag is shown.

[0018] Figure 3 The composite leaching agent preparation tank structure schematic diagram of the leaching device for preparing polyaluminum chloride from gasified slag is shown.

[0019] Figure 4 The leaching agent storage tank structure schematic diagram of the leaching device for preparing polyaluminum chloride from gasified slag is shown.

[0020] Figure 5 The base structure schematic diagram of the leaching device for preparing polyaluminum chloride from gasified slag is shown.

[0021] Explanation of reference signs: 1, base; 2, leaching agent storage tank; 3, composite leaching agent preparation tank; 101, support column; 102, sheath; 103, load-bearing arm; 104, mounting plate; 105, microwave generator; 106, servo motor; 107, primary rotating shaft; 108, ph sensor; 109, mounting bracket; 110, water outlet hole; 111, ultrasonic transducer; 112, control console; 113, inclined-blade turbine stirring blade; 114, reaction kettle; 201, connecting pipe; 202, circulating pump; 203, flow valve; 301, bottom column; 302, fixed plate; 303, connecting hole; 304, heating plate; 305, rotary motor; 306, secondary rotating shaft; 307, paddle. DETAILED DESCRIPTION

[0022] The utility model will be further explained below in combination with the drawings and examples.

[0023] Please refer to Figures 1-5The utility model provides an embodiment: gasification slag preparation polyaluminium chloride's leaching device, including base 1, leaching agent storage tank 2 and composite leaching agent blending groove 3, base 1 one side intercommunication installation is used for the leaching agent storage tank 2 of storing preparation polyaluminium chloride required leaching agent, leaching agent storage tank 2 one side intercommunication installation is used for the composite leaching agent blending groove 3 of accurate blending chemical leaching agent, the centre of base 1 top end installation has the reation kettle 114, the reation kettle 114 outside annular installation has multiple groups ultrasonic transducer 111, the centre of reation kettle 114 bottom end installation has the microwave generator 105 in the inside of base 1, first, composite leaching agent completes blending in composite leaching agent blending groove 3, during the blending process, various chemical reagents are mixed according to accurate proportion, and the mechanism such as stirring in blending groove is fully intermingled to form the composite leaching agent suitable for gasification slag leaching, and the composite leaching agent of good blending flows into leaching agent storage tank 2 and is stored, and leaching agent storage tank 2 plays the role of temporary storage, guarantees that leaching agent has stable reserve, when needing to carry out leaching reaction, the composite leaching agent in leaching agent storage tank 2 is transported to the reation kettle 114 at the centre of base 1 top end, in reation kettle 114, gasification slag and composite leaching agent start contact reaction, multiple groups ultrasonic transducer 111 installed in the annular position of reation kettle 114 start working, and ultrasonic transducer 111 converts electric energy into ultrasonic energy, and emits ultrasonic wave to the reaction system in reation kettle 114, and ultrasonic wave produces cavitation effect and mechanical vibration in liquid and so on, promotes the mixing and reaction of gasification slag and leaching agent, simultaneously, the microwave generator 105 at the centre of reation kettle 114 bottom end and in the inside of base 1 also starts operation, and microwave generator 105 generates microwave, and microwave penetrates reation kettle 114 bottom, and acts on gasification slag and leaching agent in kettle, makes molecule in system fast vibration, friction and produce heat, accelerates chemical reaction process from microcosmic level, promotes the dissolution of aluminium element in gasification slag, thereby realizes the leaching process of gasification slag preparation polyaluminium chloride.

[0024] Please refer to Figures 1-5In the embodiment, the base 1 top end near one side edge is symmetrically installed with two groups of struts 101, the two groups of struts 101 top ends are sleeved with sheaths 102, the two groups of sheaths 102 top ends are installed with load-bearing arms 103, the load-bearing arms 103 are installed with mounting plates 104 outside, the two groups of struts 101 symmetrically installed at the base 1 top end provide stable support basis for the upper structure of the whole device, they uniformly distribute stress, effectively disperse the weight of the load-bearing arms 103, the mounting plates 104 and the equipment or components that can be installed thereon, so that the whole device keeps balance in the vertical direction and is not easy to tilt or sway due to the upper load, the mounting plate 104 center is installed with a primary rotating shaft 107 penetrating, the primary rotating shaft 107 bottom end is sleeved with an inclined blade turbine stirring blade 113, the primary rotating shaft 107 one end is installed with a servo motor 106 located at the mounting plate 104 top end, the servo motor 106 output end is connected with the primary rotating shaft 107, the servo motor 106 drives the primary rotating shaft 107, in turn drives the bottom end inclined blade turbine stirring blade 113 to rotate at high speed in the reaction kettle 114, the unique blade shape and inclination angle design of the inclined blade turbine stirring blade 113 can form strong axial and radial flow in the reaction kettle 114, which makes the gasified slag and leaching agent fully mixed in the reaction kettle 114, ensures that every gasified slag particle can fully contact with the leaching agent, greatly improves the uniformity of the reaction, is beneficial to the overall leaching of aluminum element, avoids the situation of insufficient or excessive reaction in some places, the reaction kettle 114 inner wall is installed with a mounting bracket 109, the mounting bracket 109 is installed with a ph sensor 108 inside, the reaction kettle 114 bottom end is penetrated with a water outlet hole 110, the base 1 top end away from the struts 101 is installed with a control console 112, the ph sensor 108 on the reaction kettle 114 inner wall mounting bracket 109 can monitor the change of the acidity and alkalinity of the leaching reaction in the reaction kettle 114 in real time, in the process of preparing polyaluminum chloride from gasified slag, the pH value of the solution has a major impact on the reaction process and product quality, through the ph sensor 108, the operator can know the acid-base state of the reaction system at any time.

[0025] Please refer to Figures 1-4In the embodiment, two groups of connecting pipes 201 are installed on both sides of the leaching agent storage tank 2, a circulating pump 202 is installed outside one end of the two groups of connecting pipes 201, and a flow valve 203 is installed outside the other end of the two groups of connecting pipes 201. The connecting pipes 201 and the circulating pump 202 on both sides of the leaching agent storage tank 2 form a leaching agent circulation system. During the gasification residue leaching process, part of the leaching solution discharged from the reaction kettle 114 is returned to the leaching agent storage tank 2 through the connecting pipes 201 under the action of the circulating pump 202. This enables the incompletely reacted components in the leaching agent to participate in the reaction again, greatly improves the utilization rate of the leaching agent, reduces the waste of the leaching agent, reduces the production cost, and provides a stable support structure for the composite leaching agent preparation tank 3. Four groups of bottom columns 301 are installed at the corners around the bottom end of the composite leaching agent preparation tank 3, and a fixed plate 302 is installed at the bottom end of each group of bottom columns 301. A connecting hole 303 is formed through the outside of the composite leaching agent preparation tank 3. The four groups of bottom columns 301 installed at the corners around the bottom end of the composite leaching agent preparation tank 3 are evenly distributed at the bottom of the preparation tank, which can effectively disperse the weight of the preparation tank itself and the liquid contained therein, so that the preparation tank remains stable during placement and use, and is not prone to tilting, shaking and other situations caused by external forces or internal liquid shaking. This ensures the smooth progress of the preparation process and avoids problems such as liquid splashing and uneven mixing of components caused by shaking.

[0026] Please refer to Figures 1-3 In the embodiment, the composite leaching agent preparation tank 3 is hollow, a secondary rotating shaft 306 is installed through the inside center of the composite leaching agent preparation tank 3, and a paddle 307 is sleeved on the top end of the secondary rotating shaft 306. The secondary rotating shaft 306 at the inside center of the composite leaching agent preparation tank 3 drives the paddle 307 to rotate, which can generate strong stirring action in the hollow space of the composite leaching agent preparation tank 3. Since the preparation of the leaching agent requires the full and uniform mixing of multiple components, the rotation of the paddle 307 enables the different components to flow and collide quickly in the tank, breaks the stratification and local aggregation phenomenon between the components, and ensures that various chemicals are uniformly distributed in the entire preparation space, effectively improving the preparation quality of the composite leaching agent. A rotating motor 305 is installed at one end of the secondary rotating shaft 306 at the bottom end of the composite leaching agent preparation tank 3. The output end of the rotating motor 305 is connected with the secondary rotating shaft 306. Two groups of heating plates 304 are installed at the bottom end of the composite leaching agent preparation tank 3 on both sides of the rotating motor 305. The rotating motor 305 provides stable and strong power for the secondary rotating shaft 306, ensuring that the paddle 307 can continuously and efficiently stir the various components in the composite leaching agent preparation tank 3. By accurately controlling the rotating speed of the rotating motor 305, the stirring speed can be flexibly adjusted to meet the preparation requirements at different stages.

[0027] In the process of working, first, in the composite leaching agent preparation tank 3, various chemical raw materials are accessed through the connecting hole 303, the rotating motor 305 drives the secondary shaft 306, and the paddle 307 stirs and mixes the raw materials. At the same time, the two groups of heating plates 304 can heat the substances in the preparation tank as needed to accelerate the chemical reaction and dissolution process, so as to accurately prepare the required composite leaching agent. The prepared leaching agent flows into the leaching agent storage tank 2 through the connecting pipe 201 for temporary storage, providing stable raw material supply for subsequent leaching reaction. The reaction kettle 114 at the top center of the base 1 is ready, the servo motor 106 drives the primary shaft 107, and the inclined blade turbine stirring blade 113 starts to operate, and the stirring speed is adjusted to prepare for the upcoming reaction. The composite leaching agent in the leaching agent storage tank 2 is transported into the reaction kettle 114 through the pipeline, and at the same time, the gasified slag is also added into the reaction kettle 114 through a specific feeding device. When the gasified slag and the composite leaching agent are mixed in the reaction kettle 114, a series of reinforced reaction components start to work. The multiple groups of ultrasonic transducers 111 installed at the annular position outside the reaction kettle 114 emit ultrasonic waves to promote the mixing and reaction of the gasified slag and the leaching agent by using the cavitation effect and mechanical vibration of ultrasonic waves. The microwave generator 105 located at the bottom center of the reaction kettle 114 generates microwaves to accelerate the chemical reaction process from a microscopic level and promote the dissolution of aluminum elements in the gasified slag. In this process, the inclined blade turbine stirring blade 113 continues to stir, further enhancing the mixing effect of the gas-liquid-solid three phases and improving the uniformity and rate of the reaction. The ph sensor 108 on the reaction kettle 114 inner wall mounting bracket 109 monitors the acidity and alkalinity of the reaction system in real time. The operator can obtain real-time reaction data such as pH value through the console 112 away from the support 101 at the top end of the base 1. According to these data, the operator can adjust the servo motor 106, microwave generator 105, ultrasonic transducer 111 and other equipment through the console 112 to ensure that the reaction is always carried out under the best conditions. When the pH value deviates from the set range, the operator can adjust the amount of leaching agent added or the reaction conditions through the console 112. During the leaching reaction process, the connecting pipe 201, circulating pump 202 and flow valve 203 on both sides of the leaching agent storage tank 2 play a role. The circulating pump 202 pumps part of the reacted leaching liquid in the reaction kettle 114 back to the leaching agent storage tank 2 through the connecting pipe 201, and the flow valve 203 accurately controls the circulation flow to make the incompletely reacted components in the leaching agent participate in the reaction again, improve the utilization rate of the leaching agent, and at the same time maintain the relative stability of the leaching agent concentration in the reaction system. When the leaching reaction is completed, the water outlet hole 110 at the bottom of the reaction kettle 114 is opened, and the solution containing polyaluminum chloride and other impurities is discharged into the subsequent separation, purification and other processing links to obtain the final polyaluminum chloride product.

[0028] Through the above steps, first, the composite leaching agent is prepared in the composite leaching agent preparation tank 3, and during the preparation process, various chemical reagents are mixed according to accurate proportions and fully mixed through stirring and other mechanisms in the preparation tank to form a composite leaching agent suitable for gasification slag leaching. The prepared composite leaching agent flows into the leaching agent storage tank 2 for storage. The leaching agent storage tank 2 serves as a temporary storage function to ensure a stable supply of leaching agent. When the leaching reaction is needed, the composite leaching agent in the leaching agent storage tank 2 is transported to the reaction kettle 114 located at the top center of the base 1. In the reaction kettle 114, the gasification slag and the composite leaching agent begin to react. At this time, the multiple groups of ultrasonic transducers 111 installed in the annular position outside the reaction kettle 114 begin to work. The ultrasonic transducers 111 convert electrical energy into ultrasonic energy and emit ultrasonic waves to the reaction system inside the reaction kettle 114. The ultrasonic waves produce cavitation effects and mechanical vibrations in the liquid, promoting the mixing and reaction of the gasification slag and the leaching agent. At the same time, the microwave generator 105 located at the bottom center of the reaction kettle 114 and inside the base 1 also begins to operate. The microwave generator 105 generates microwaves that penetrate the bottom of the reaction kettle 114 and act on the gasification slag and the leaching agent in the kettle. The microwaves make the molecules in the system vibrate and rub quickly, generating heat, which accelerates the chemical reaction process from a microscopic level and promotes the dissolution of aluminum elements in the gasification slag, thereby realizing the leaching process of preparing polyaluminum chloride from gasification slag.

Claims

1. A leaching device for preparing polyaluminum chloride from gasification slag, comprising a base (1); characterized in that: The base (1) is provided with a plurality of groups of ultrasonic transducers (111) arranged annularly outside the reaction kettle (114), and a microwave generator (105) arranged inside the base (1) at the bottom end of the reaction kettle (114).

2. The leaching device for producing polyaluminum chloride from gasification slag according to claim 1, characterized in that: The base (1) is provided with two groups of struts (101) symmetrically arranged at the top end near the side edges, and the top ends of the two groups of struts (101) are sleeved with sheaths (102), and the top ends of the two groups of sheaths (102) are provided with load-bearing arms (103), and the load-bearing arms (103) are provided with mounting plates (104) outside.

3. The leaching device for producing polyaluminum chloride from gasification slag according to claim 2, characterized in that: The center of the mounting plate (104) is provided with a primary rotating shaft (107) penetrating through, and the bottom end of the primary rotating shaft (107) is sleeved with a pitched blade turbine stirring blade (113), and one end of the primary rotating shaft (107) is provided with a servo motor (106) arranged at the top end of the mounting plate (104), and the output end of the servo motor (106) is connected with the primary rotating shaft (107).

4. The leaching device for producing polyaluminum chloride from gasification slag according to claim 3, characterized in that: The inner wall of the reaction kettle (114) is provided with a mounting bracket (109), and the ph sensor (108) is arranged inside the mounting bracket (109), and the bottom end of the reaction kettle (114) is provided with a water outlet hole (110) penetratingly formed, and the top end of the base (1) is provided with a control console (112) away from the struts (101).

5. The leaching device for producing polyaluminum chloride from gasification slag according to claim 1, characterized in that: The two sides of the leaching agent storage tank (2) are provided with two groups of connecting pipes (201) communicatedly arranged, and the outer sides of the two groups of connecting pipes (201) are provided with circulating pumps (202) near one end, and the outer sides of the two groups of connecting pipes (201) are provided with flow valves (203) near the other end.

6. The leaching device for producing polyaluminum chloride from gasification slag according to claim 1, characterized in that: The bottom end of the composite leaching agent preparation tank (3) is provided with four groups of bottom columns (301) arranged at the corners, and the bottom ends of the four groups of bottom columns (301) are provided with fixing plates (302), and the outer side of the composite leaching agent preparation tank (3) is provided with a connecting hole (303) penetratingly formed.

7. The leaching device for producing polyaluminum chloride from gasification slag according to claim 6, characterized in that: The composite leaching agent preparation tank (3) is hollow, and the inside of the composite leaching agent preparation tank (3) is provided with a secondary rotating shaft (306) penetratingly arranged at the center, and the top end of the secondary rotating shaft (306) is sleeved with a paddle (307) outside.

8. The leaching device for producing polyaluminum chloride from gasification slag according to claim 7, characterized in that: One end of the secondary rotating shaft (306) is provided with a rotary motor (305) arranged at the bottom end of the composite leaching agent preparation tank (3), and the output end of the rotary motor (305) is connected with the secondary rotating shaft (306), and the bottom end of the composite leaching agent preparation tank (3) is provided with two groups of heating plates (304) arranged at both sides of the rotary motor (305).

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