Fluidized bed for extracting vanadium and decarburization from stone coal with cleanable exhaust gas

Abstract

This utility model discloses a fluidized bed for vanadium extraction and decarbonization of shale coal that can clean waste gas. It includes: a fluidized bed body, comprising an inlet pipe fixedly connected to the side of the fluidized bed body, a vortex chamber fixedly connected to the outer wall of the inlet pipe, an exhaust pipe fixedly connected to the top of the inner wall of the vortex chamber, a return pipe fixedly connected to the bottom of the vortex chamber, a rotating shaft fixedly connected to the inner wall of the return pipe, and baffles movably sleeved on the outer wall of the rotating shaft. This system separates shale coal particles from the gas inside the waste gas, allowing the particles to flow back into the fluidized bed during waste gas cleaning, improving raw material utilization. It recovers incompletely decarbonized shale coal and vanadium elements from the particles, which can then participate in the reaction again after recirculation, reducing raw material waste and lowering shale coal consumption costs. It eliminates the need for shutdown to handle accumulated particles, while also preventing backflow of airflow and stabilizing the waste gas cleaning and decarbonization reaction conditions.

Description

Technical Field

[0001] This utility model relates to the field of vanadium extraction and decarbonization technology in coal shale, and in particular to a fluidized bed for vanadium extraction and decarbonization of coal shale that can clean up waste gas. Background Technology

[0002] Fluidized bed reactors for vanadium extraction and decarbonization of shale are core reaction equipment designed specifically for vanadium extraction processes from shale. Based on high-temperature fluidized bed technology, the fluidization of inert particles within the bed allows shale particles to come into full contact with hot air or oxidant, efficiently removing carbon components from the shale (generating CO2, etc.) while simultaneously activating vanadium.

[0003] The waste gas from the fluidized bed vanadium extraction and decarburization process in shale coal contains a large amount of particulate debris, which needs to be separated by a separation device to achieve gas-solid separation. However, the existing device cannot automatically discharge the recovered particles back to the fluidized bed, which not only leads to the waste of debris containing incompletely decarburized shale coal and vanadium, reducing raw material utilization and increasing costs, but also easily causes debris to accumulate and block pipes, filter media and discharge valves, requiring frequent manual cleaning, interrupting the process and weakening the continuity of the process. Utility Model Content

[0004] This invention provides a fluidized bed for vanadium extraction and decarbonization of coal shale that can clean up waste gas, thereby solving the above-mentioned problems.

[0005] This utility model provides a fluidized bed for vanadium extraction and decarbonization of coal shale that can clean up waste gas, comprising:

[0006] The gas-particle separation mechanism includes a fluidized bed body, an air inlet pipe fixedly connected to the side of the fluidized bed body, a vortex chamber fixedly connected to the outer wall of the air inlet pipe, an exhaust pipe fixedly connected to the top of the inner wall of the vortex chamber, a return pipe fixedly connected to the bottom of the vortex chamber, a rotating shaft fixedly connected to the inner wall of the return pipe, and a baffle movably sleeved on the outer wall of the rotating shaft, used to separate coal particles inside the waste gas from the gas.

[0007] In a fluidized bed for vanadium extraction and decarbonization of coal that can clean up waste gas according to one embodiment of the present invention, a limiting plate is fixedly connected to the inner wall of the reflux pipe, and a baffle is attached to the outer wall of the limiting plate. The limiting plate is located on the side of the baffle and away from the main body of the fluidized bed.

[0008] In a fluidized bed for vanadium extraction and decarbonization of coal that can clean up waste gas according to one embodiment of this utility model, a fixed baffle is fixedly connected to the inner wall of the reflux pipe, and a spring is fixedly connected to the outer wall of the fixed baffle.

[0009] In a fluidized bed for vanadium extraction and decarbonization of coal that can clean up waste gas according to one embodiment of this utility model, a protective sleeve is movably sleeved on the outer wall of the spring. One end of the protective sleeve is fixedly connected to a fixed baffle, and the other end of the protective sleeve is fixedly connected to a baffle plate.

[0010] In a fluidized bed for vanadium extraction and decarbonization of coal that can clean up waste gas according to one embodiment of the present invention, a supporting truss is fixedly connected to the top of the inner wall of the fluidized bed body, and the supporting truss is cross-shaped.

[0011] In a fluidized bed for vanadium extraction and decarbonization of coal that can clean up waste gas according to one embodiment of this utility model, a filter screen plate is fixedly connected to the bottom end of the supporting truss, and the filter screen plate has air passage holes inside.

[0012] In a fluidized bed for vanadium extraction and decarbonization of coal that can clean up waste gas according to one embodiment of the present invention, a connecting truss is fixedly connected to the bottom of the inner wall of the vortex chamber, and an ash discharge cone is fixedly connected to the top of the connecting truss. The ash discharge cone is conical.

[0013] The technical solution provided in this application embodiment may include the following beneficial effects: This application designs a fluidized bed for vanadium extraction and decarbonization of shale that can clean waste gas. It can recirculate the particles in the waste gas back into the fluidized bed during waste gas cleaning to improve the utilization rate of raw materials, recover the shale and vanadium elements contained in the particles that are not completely decarbonized, and allow them to participate in the reaction again after recirculation, thereby reducing raw material waste, reducing the cost of shale consumption, eliminating the need to stop the machine to deal with the accumulated particles, and avoiding backflow of airflow, thus stabilizing the waste gas cleaning and decarbonization reaction conditions.

[0014] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are 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 fluidized bed for vanadium extraction and decarbonization of coal shale that can clean up waste gas, provided in one embodiment of this application;

[0017] Figure 2 yes Figure 1 A schematic diagram of a partial vertical section structure;

[0018] Figure 3 yes Figure 1 A schematic diagram of a partial cross-section structure;

[0019] Figure 4 yes Figure 3 A magnified structural diagram of part A.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Fluidized bed body; 2. Separation chamber; 3. Exhaust pipe; 4. Inlet pipe; 5. Return pipe; 6. Filter screen; 7. Support truss; 8. Ash discharge cone; 9. Connecting truss; 10. Fixed baffle; 11. Rotating shaft; 12. Baffle plate; 13. Limiting plate; 14. Spring; 15. Protective sleeve. Detailed Implementation

[0022] 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, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0025] like Figures 1 to 4 As shown, this application provides a fluidized bed for vanadium extraction and decarbonization of coal shale that can clean up waste gas, including: a gas-particle separation mechanism, including a fluidized bed body 1, an air inlet pipe 4 fixedly connected to the side of the fluidized bed body 1, a vortex chamber 2 fixedly connected to the outer wall of the air inlet pipe 4, an exhaust pipe 3 fixedly connected to the top of the inner wall of the vortex chamber 2, a return pipe 5 fixedly connected to the bottom of the vortex chamber 2, a rotating shaft 11 fixedly connected to the inner wall of the return pipe 5, and a baffle 12 movably sleeved on the outer wall of the rotating shaft 11, for separating coal shale particles inside the waste gas from the gas.

[0026] With the above technical solution adopted, the air inlet pipe 4 is precisely connected to the side of the fluidized bed body 1. This air inlet pipe 4, as the core channel for exhaust gas discharge, can stably extract the dust-laden exhaust gas generated inside the fluidized bed body 1, ensuring the exhaust gas enters the subsequent separation stage in an orderly manner. During the exhaust gas discharge process, the airflow first rushes into the vortex chamber 2. Guided by the cylindrical cavity structure of the vortex chamber 2, the exhaust gas forms a high-speed rotating airflow along the chamber wall surface. During this process, the powerful centrifugal force generated by the rotating airflow throws solid impurities such as coal particles and decarburized debris mixed in the exhaust gas towards the chamber wall, achieving preliminary gas-solid separation.

[0027] The vortex chamber 2 is a conical structure with a diameter that gradually decreases from top to bottom. This forces the downward rotating airflow to continuously shrink its trajectory radius, which not only further enhances the centrifugal force and improves the collection efficiency of fine particles, but also guides the solid impurities thrown against the chamber wall to slide down the conical surface. Finally, they are discharged through the slot at the bottom of the vortex chamber 2 and accurately enter the return pipe 5. Subsequently, these recovered solid particles are transported back to the fluidized bed body 1 through the return pipe 5 to participate in the vanadium extraction and decarbonization reaction again. This avoids the waste of coal particles lost with the exhaust gas treatment, improves the utilization rate of raw materials, and reduces the consumption of coal and the overall production cost.

[0028] To optimize the reflux process, a rotatable baffle 12 is specially installed inside the reflux pipe 5. The baffle 12 is connected to the inner wall of the reflux pipe 5 through a rotating shaft 11. When the particles accumulated at the top of the baffle 12 reach a certain weight, the weight of the particles themselves will push the baffle 12 to rotate downward around the rotating shaft 11, so that the particles accumulated at the top can fall smoothly into the fluidized bed body 1, ensuring that the secondary decarbonization work is carried out in an orderly manner. At the same time, this structure can effectively block the reverse impact of the high-pressure airflow inside the fluidized bed body 1, and prevent particles from flowing back into the reflux pipe 5.

[0029] In an optional embodiment, a limiting plate 13 is fixedly connected to the inner wall of the return pipe 5, and a baffle 12 is attached to the outer wall of the limiting plate 13. The limiting plate 13 is located on the side of the baffle 12 and away from the fluidized bed body 1. To further ensure the stable function of the baffle 12, a limiting plate 13 is added to its side away from the fluidized bed body 1. The limiting plate 13 restricts the rotation angle of the baffle 12, preventing the high-pressure gas inside the fluidized bed body 1 from pushing the baffle 12 to the upper end and avoiding backflow of air into the vortex chamber 2, which would disrupt the airflow rotation state, thereby ensuring the stability of the waste gas separation and cleaning process.

[0030] In an optional embodiment, a fixed baffle 10 is fixedly connected to the inner wall of the return pipe 5, and a spring 14 is fixedly connected to the outer wall of the fixed baffle 10. A spring 14 is added to the side of the baffle 12, and the elastic potential energy of the spring 14 enables the baffle 12 to automatically reset and seal. When the weight of the particles accumulated at the upper end of the baffle 12 is insufficient, the elastic force of the spring 14 will push the baffle 12 to tightly adhere to the inner wall of the return pipe 5, achieving the sealing of the return pipe 5 and preventing airflow leakage. When the particle weight reaches a threshold and pushes the baffle 12 to flip and discharge material, the spring 14 will quickly pull the baffle 12 back to the initial sealing position, ensuring that the inside of the return pipe 5 always maintains a unidirectional flow state where "particles only flow from the vortex chamber 2 to the fluidized bed, without reverse backflow."

[0031] In an optional embodiment, a protective sleeve 15 is movably fitted onto the outer wall of the spring 14. One end of the protective sleeve 15 is fixedly connected to the fixed baffle 10, and the other end of the protective sleeve 15 is fixedly connected to the baffle plate 12. Considering that the fluidized bed is in a high-temperature reaction environment, a protective sleeve 15 is specially added to the outer wall of the spring 14 to extend its service life and ensure its long-term stable operation.

[0032] It should be noted that the material of the protective sleeve 15 should be a wear-resistant metal sleeve such as 316L stainless steel or a high-temperature resistant rubber sleeve, to prevent the particles from directly contacting the spring, while not affecting the spring's extension and contraction.

[0033] In one optional embodiment, a support truss 7 is fixedly connected to the top of the inner wall of the fluidized bed body 1. The support truss 7 is cross-shaped, and a filter screen plate 6 is fixedly connected to the bottom of the support truss 7. The filter screen plate 6 has air passage holes inside. Inside the fluidized bed body 1, a support truss 7 is also provided. This truss is fixed to the inner wall of the fluidized bed by welding, providing stable support for the filter screen plate 6 and horizontally fixing the filter screen plate 6 inside the fluidized bed body 1. The installation position of the filter screen plate 6 precisely corresponds to the lower end of the inlet of the air inlet pipe 4. When the exhaust gas enters the air inlet pipe 4 from the fluidized bed body 1, it will first pass through the filter screen plate 6 for filtration. The filter screen plate 6 can initially intercept larger solid particles in the exhaust gas, blocking a large number of coarse particles at the lower end of the filter screen plate 6, reducing the total amount of particles entering the vortex chamber 2, reducing the separation load of the vortex chamber 2, and further improving the quality and efficiency of subsequent exhaust gas cleaning.

[0034] In an optional embodiment, a connecting truss 9 is fixedly connected to the bottom of the inner wall of the separation chamber 2, and a dust discharge cone 8 is fixedly connected to the top of the connecting truss 9. The dust discharge cone 8 is conical. By setting the dust discharge cone 8, dust collection is enhanced, dust is guided to be discharged, and airflow short-circuiting is prevented from damaging the separation effect. The cone surface guides the dust to slide down the wall, avoiding dust accumulation at the junction of the cylindrical section and the cone section, and ensuring that the separated dust can continue to move downward.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. 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, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0038] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A fluidized bed for vanadium extraction and decarburization from stone coal, which can clean exhaust gas, characterized in that, include: The gas-particle separation mechanism includes a fluidized bed body (1), an air inlet pipe (4) fixedly connected to the side of the fluidized bed body (1), a vortex chamber (2) fixedly connected to the outer wall of the air inlet pipe (4), an exhaust pipe (3) fixedly connected to the top of the inner wall of the vortex chamber (2), a return pipe (5) fixedly connected to the bottom of the vortex chamber (2), a rotating shaft (11) fixedly connected to the inner wall of the return pipe (5), and a baffle (12) movably sleeved on the outer wall of the rotating shaft (11), which is used to separate the coal particles inside the waste gas from the gas.

2. The fluidized bed for decarburization and vanadium extraction from stone coal according to claim 1, characterized in that, The inner wall of the reflux pipe (5) is fixedly connected to a limiting piece (13), and a baffle (12) is attached to the outer wall of the limiting piece (13). The limiting piece (13) is located on the side of the baffle (12) and away from the fluidized bed body (1).

3. The fluidized bed for decarburization and vanadium extraction from stone coal according to claim 1, characterized in that, A fixed baffle (10) is fixedly connected to the inner wall of the return pipe (5), and a spring (14) is fixedly connected to the outer wall of the fixed baffle (10).

4. The fluidized bed for decarburization and vanadium extraction from stone coal according to claim 3, characterized in that, The outer wall of the spring (14) is movably fitted with a protective sleeve (15). One end of the protective sleeve (15) is fixedly connected to the fixed baffle (10), and the other end of the protective sleeve (15) is fixedly connected to the baffle (12).

5. The fluidized bed for decarburization and vanadium extraction from stone coal according to claim 1, characterized in that, A support truss (7) is fixedly connected to the top of the inner wall of the fluidized bed body (1), and the support truss (7) is cross-shaped.

6. The fluidized bed for decarburization and vanadium extraction from stone coal according to claim 5, characterized in that, The bottom end of the support truss (7) is fixedly connected to a filter screen plate (6), and the filter screen plate (6) has air holes inside.

7. The fluidized bed for decarburization and vanadium extraction from stone coal according to claim 1, characterized in that, The bottom of the inner wall of the vortex chamber (2) is fixedly connected to a connecting truss (9), and the top of the connecting truss (9) is fixedly connected to a ash discharge cone (8), which is conical.

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