A flue gas treatment device based on a noble metal catalyst

Abstract

The application discloses a flue gas treatment device based on noble metal catalysts and relates to the technical field of flue gas treatment.The device comprises a treatment box, an inner mounting frame is fixedly installed on the inner surface wall of the treatment box, an annular outer frame is fixedly installed on one side of the outer wall of the inner mounting frame, and a rotating groove is arranged in the annular outer frame.The device provides a clean reaction environment for the noble metal catalysts through a multi-stage cooperative filtering mechanism;the linkage frame drives the filter plate to rotate, centrifugal force and composite filter material (stainless steel filter screen+activated carbon) are utilized to intercept large-particle impurities and sulfur oxides and chlorides;the guide vanes form spiral air flow, and centrifugal force is utilized to separate fine impurities with a particle size greater than or equal to 1 micrometer;the metal filter pipe is combined with dynamic negative pressure adsorption to deeply remove residual dust;three-stage filtering can greatly reduce the impurity content in flue gas, avoid catalyst poisoning, blockage or sintering, prolong the service life of the catalysts, and greatly reduce the replacement cost of noble metals.

Description

Technical Field

[0001] This invention relates to the field of flue gas treatment technology, specifically to a flue gas treatment device based on a precious metal catalyst. Background Technology

[0002] Industrial production processes generate large amounts of flue gas containing pollutants. Direct emission of such gas can cause serious environmental pollution. Due to their excellent catalytic performance, precious metal catalysts are widely used in flue gas treatment.

[0003] In flue gas treatment devices using precious metal catalysts, impurities such as sulfur oxides, chlorides, and heavy metals in the flue gas can poison the catalyst through chemical reactions. This poisoning can lead to the formation of stable compounds causing permanent deactivation, or the adsorption of active sites causing temporary efficiency reduction. Simultaneously, impurities such as dust and tar can deposit and clog the catalyst surface and pores, significantly reducing the specific surface area, hindering the reaction, and even causing catalyst sintering due to localized overheating, further exacerbating the loss of activity. The high cost of precious metals makes frequent replacement a heavy economic burden. In terms of device operation, abnormal pressure drops caused by impurity deposits can increase fan load, leading to equipment overload and shutdown. Localized accumulation of combustibles poses a risk of deflagration, and acidic impurities can corrode metal components, significantly reducing equipment stability and lifespan. Environmentally, insufficient catalyst activity will result in excessive pollutant emissions, violating relevant regulations and facing penalties such as fines and production restrictions. Furthermore, untreated heavy metals and other impurities can cause secondary pollution, harming the environment and health. In addition, unremoved impurities entering subsequent purification units can reduce the efficiency of desulfurization and adsorption processes, creating a vicious cycle. Summary of the Invention

[0004] The purpose of this invention is to provide a flue gas treatment device based on a precious metal catalyst. This device provides a clean environment for the precious metal catalyst through three-stage synergistic filtration. A linkage frame drives the filter plates to rotate, intercepting large particles and sulfur and chlorides; guide vanes and spiral airflow separate impurities ≥1μm; and a metal filter tube uses dynamic negative pressure to adsorb residual dust. This significantly reduces impurities, avoids catalyst poisoning and clogging, extends catalyst life, and reduces replacement costs, thereby solving the problems mentioned in the background.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a flue gas treatment device based on a precious metal catalyst, comprising: a treatment box;

[0006] An inner mounting bracket is fixedly installed on the inner wall of the processing box. An annular outer frame is fixedly installed on one side of the outer wall of the inner mounting bracket. A rotating groove is pre-set inside the annular outer frame. A rotating plate is rotatably connected to the inner wall of the rotating groove. A rotating rod is fixedly installed on one side of the outer wall of the rotating plate. Two fixed seats are fixedly connected to one side of the outer wall of the annular outer frame. A movable embedding plate is embedded inside each of the two fixed seats. A limit frame is fixedly connected between the opposite sides of the two embedding plates. A bearing is rotatably connected inside the limit frame. The rotating rod is fixedly installed inside the bearing.

[0007] Preferably, a metal filter tube is fixedly connected between one side of the outer wall of the two embedded plates, and a guide plate is fixedly installed on the inner surface of the metal filter tube near the bottom position, and a trigger switch is contacted on the bottom side of the guide plate.

[0008] Preferably, the top and bottom ends of the metal filter tube are both fixedly connected to corrugated pipes, and the trigger switch is fixedly installed on the bottom of the inner wall of the processing box.

[0009] Preferably, the top of the processing box is fixedly connected to a central frame, and the interior of the central frame has an internal slot.

[0010] Preferably, an inlet tube is fixedly inserted inside the middle frame, and the output end of the inlet tube is connected to the built-in groove.

[0011] Preferably, the bottom of the central frame is fixedly connected to a flow guide frame, and the flow guide frame is provided with flow guide blades inside.

[0012] Preferably, a motor frame is fixedly installed on the top of the central frame, a drive motor is fixedly installed on the top of the motor frame, a drive rod is fixedly connected to the rotating end of the drive motor, and guide vanes are fixedly connected to the outer wall of the drive rod.

[0013] Preferably, an outer support frame is fixedly installed on the outer wall of the processing box, the bottom end of the outer support frame is in contact with the ground, and there are four outer support frames arranged in a rectangular array on the outside of the processing box.

[0014] Preferably, the filter plate adopts a composite layer structure of stainless steel filter mesh and activated carbon, and the thickness of the filter plate is 5-10mm. Its surface has uniformly distributed filter holes with a pore size of 0.1-0.5mm.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] In this invention, a clean reaction environment is provided for the precious metal catalyst through multi-stage synergistic filtration: the linkage frame drives the filter plate to rotate, and centrifugal force and composite filter material (stainless steel filter screen + activated carbon) are used to intercept large particulate impurities, sulfur oxides, and chlorides; the guide vanes form a spiral airflow, and centrifugal force separates fine impurities with a particle size ≥1μm; the metal filter tube combined with dynamic negative pressure adsorption deeply removes residual dust. The three-stage filtration can greatly reduce the impurity content in the flue gas, avoid catalyst poisoning, blockage or sintering, extend catalyst life, and significantly reduce the replacement cost of precious metals.

[0017] In this invention, a built-in motor drives the rotating plate to rotate. Through the cooperation of the rotating rod and the bearing, the embedded plate drives the metal filter tube to move up and down reciprocally. With the linkage design of the trigger switch and the negative pressure pump, the impurities accumulated on the top of the guide plate can be automatically collected and discharged, avoiding the abnormal pressure drop caused by impurity deposition in traditional static filtration. At the same time, the corrugated pipe can compensate for displacement and maintain a seal, ensuring the stability of the flue gas passage and reducing the risk of equipment overload shutdown. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of a flue gas treatment device based on a precious metal catalyst according to the present invention.

[0019] Figure 2 This is a schematic diagram of a portion of the structure of a flue gas treatment device based on a precious metal catalyst according to the present invention.

[0020] Figure 3 This is a three-dimensional cross-sectional view of a portion of the structure of a flue gas treatment device based on a precious metal catalyst according to the present invention.

[0021] Figure 4 This invention relates to a flue gas treatment device based on a precious metal catalyst. Figure 3 Schematic diagram of the enlarged structure of B;

[0022] Figure 5 This is a schematic diagram of the internal structure of a flue gas treatment device based on a precious metal catalyst according to the present invention.

[0023] Figure 6 This is a three-dimensional view of the internal parts of a flue gas treatment device based on a precious metal catalyst according to the present invention.

[0024] Figure 7 This is a cross-sectional plan view of the metal filter tube in a flue gas treatment device based on a precious metal catalyst according to the present invention.

[0025] In the diagram: 1. Processing box; 11. Outer support frame; 12. Middle frame; 121. Inlet pipe; 13. Motor frame; 131. Drive motor; 1311. Drive rod; 2. Guide frame; 21. Guide vane; 31. Linkage frame; 311. Embedding groove; 32. Filter plate; 4. Inner mounting frame; 41. Annular outer frame; 411. Rotating groove; 42. Rotating plate; 421. Rotating rod; 43. Fixed seat; 44. Embedding plate; 45. Limiting frame; 46. Bearing; 5. Metal filter pipe; 51. Guide plate; 511. Negative pressure pump; 52. Trigger switch; 53. Corrugated pipe. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Example 1, such as Figures 5-7 As shown: A flue gas treatment device based on a precious metal catalyst, comprising: a treatment box 1;

[0028] An inner mounting bracket 4 is fixedly installed on the inner wall of the processing box 1. An annular outer frame 41 is fixedly installed on one side of the outer wall of the inner mounting bracket 4. A rotating groove 411 is pre-set inside the annular outer frame 41. A rotating plate 42 is rotatably connected to the inner wall of the rotating groove 411. A rotating rod 421 is fixedly installed on one side of the outer wall of the rotating plate 42. Two fixed seats 43 are fixedly connected to one side of the outer wall of the annular outer frame 41. A movable embedding plate 44 is embedded inside each of the two fixed seats 43. A limit frame 45 is fixedly connected between the opposite sides of the two embedding plates 44. A bearing 46 is rotatably connected inside the limit frame 45. The rotating rod 421 is fixedly installed inside the bearing 46.

[0029] In this embodiment, the inner mounting bracket 4 is first installed inside the processing box 1, and both are kept in a fixed installation. At this time, the built-in motor is powered on and its output end drives the rotating plate 42 to rotate. Since the rotation of the rotating plate 42 is limited by the internal cooperation of the rotating groove 411, the stability of the rotating plate 42 when it rotates is maintained. The rotating rod 421 is fixedly installed on one side of the outer wall of the rotating plate 42. It is installed near the edge of the rotating plate 42. When the rotating plate 42 rotates, the centrifugal force of the rotation can drive the bearing 46 installed on its outer wall to make a circular motion. Due to the action of the bearing 46 itself, and the outer wall of the bearing 46 is also rotatably connected to the internal cooperation of the limiting frame 45, the two embedded plates 44 can move up and down inside the fixed seat 43.

[0030] Furthermore, the built-in motor is specifically a three-phase asynchronous motor with a rated speed of 1440 r / min. It is installed on the side of the annular outer frame 41 away from the rotating plate 42 and is fixedly connected to the central shaft of the rotating plate 42 through a coupling. The motor speed can be adjusted by a PLC controller (model: S7-1200) according to the flue gas flow rate (0-5000 m³ / h). When the flue gas flow rate exceeds 3000 m³ / h, the speed is increased to 1750 r / min to enhance the centrifugal force of rotation and ensure that the vertical movement stroke of the embedded plate 44 is stable at 50-80 mm.

[0031] like Figure 5 As shown: A metal filter tube 5 is fixedly connected between one side of the outer wall of the two embedded plates 44. A guide plate 51 is fixedly installed on the inner surface of the metal filter tube 5 near the bottom. A trigger switch 52 is in contact with the bottom side of the guide plate 51.

[0032] The top and bottom of the metal filter tube 5 are both fixedly connected to the corrugated pipe 53, and the trigger switch 52 is fixedly installed on the bottom of the inner wall of the processing box 1.

[0033] In this embodiment, when the two embedded plates 44 can move up and down inside the fixed base 43, they can drive the metal filter tube 5 to move up and down. Since the top and bottom of the metal filter tube 5 are connected by the corrugated pipe 53, the corrugated pipe 53 itself can meet the angle and position adjustment. When the metal filter tube 5 is in a downward movement process, the negative pressure pump 511 set at the bottom of the metal filter tube 5 will be kept in contact with the trigger switch 52. The negative pressure pump 511 is in the energized state. The negative pressure generated by itself can gather the impurities generated at the top of the guide plate 51 to the center and adsorb them into its own interior. They are then discharged to the outside through the pipe, thus achieving effective filtration of impurities.

[0034] Furthermore, the trigger switch 52 is a limit switch, with a trigger threshold of 15mm downward movement of the metal filter tube 5 (i.e., triggering when the contact pressure between the bottom of the guide plate 51 and the switch contact reaches 5N). The negative pressure pump 511 is an oil-free vortex vacuum pump with a rated suction of 8kPa and a flow rate of 120m³ / h. After triggering, it runs continuously for 30 seconds to ensure that impurities are completely discharged. During operation, the displacement is compensated by the elastic deformation of the bellows 53. The bellows 53 is made of fluororubber, with a pressure resistance of ≥0.2MPa and a temperature resistance of -20℃~200℃ to ensure the sealing of the flue gas passage.

[0035] like Figures 1-3 As shown: The top of the processing box 1 is fixedly connected to the middle frame 12, and the middle frame 12 has an internal groove 1211 inside;

[0036] An inlet tube 121 is fixedly inserted inside the middle frame 12. The output end of the inlet tube 121 is connected to the built-in groove 1211. A guide frame 2 is fixedly connected to the bottom of the middle frame 12. A guide vane 21 is provided inside the guide frame 2.

[0037] A motor frame 13 is fixedly installed on the top of the central frame 12, a drive motor 131 is fixedly installed on the top of the motor frame 13, a drive rod 1311 is fixedly connected to the rotating end of the drive motor 131, and a guide vane 21 is fixedly connected to the outer wall of the drive rod 1311.

[0038] In this embodiment, when the device is in use, the flue gas enters the interior of the built-in groove 1211 in the middle frame 12 through the inlet pipe 121. During this process, the drive motor 131 is powered on and its output end starts to rotate, which can drive the drive rod 1311 to rotate. During the rotation of the drive rod 1311, the three linkage frames 31 rotate with the rotation of the drive rod 1311. During this process, the impurities in the flue gas can be effectively filtered to one side of the filter plate 32.

[0039] During this process, the drive rod 1311 rotates continuously, causing the guide vane 21 to rotate rapidly inside the guide frame 2. Through the filter holes opened at the bottom of the inner wall of the built-in groove 1211, the flue gas can be effectively guided downward. The flue gas then enters the interior of the guide frame 2 and is continuously discharged into the interior of the metal filter tube 5. The gas forms a spiral downward state, and finally the fine impurities remaining in the flue gas are filtered to the top of the guide plate 51.

[0040] Furthermore, the guide vane 21 has a propeller-type structure with 3 blades. The angle between the guide vane 21 and the drive rod 1311 is 30°. The blade thickness is 2mm and the material is 316 stainless steel. The drive motor 131 is set to a speed of 1500r / min. When the guide vane 21 rotates, a spiral airflow with a velocity of 8-12m / s is formed in the guide frame 2. Fine impurities with a particle size ≥1μm are separated by centrifugal force.

[0041] like Figure 4 As shown: Three linkage frames 31 are fixedly connected to the outer wall of the drive rod 1311. Each of the three linkage frames 31 has a pre-set embedding groove 311 inside. Each of the three embedding grooves 311 has a filter plate 32 embedded in its inner surface.

[0042] An outer support frame 11 is fixedly installed on the outer wall of the treatment box 1. The bottom end of the outer support frame 11 is in contact with the ground, and there are four outer support frames 11 arranged in a rectangular array on the outside of the treatment box 1. The filter plate 32 adopts a composite layer structure of stainless steel filter screen and activated carbon, and the thickness of the filter plate 32 is 5-10mm. Its surface is provided with uniformly distributed filter holes with a pore diameter of 0.1-0.5mm.

[0043] In this embodiment, the three linkage frames 31 and the drive rod 1311 are in a fixed installation state, and can rotate with the rotation of the drive rod 1311. The filter plate 32 is embedded in the embedding groove 311, which can effectively realize the replacement and installation of the filter plate 32.

[0044] Furthermore, the stainless steel filter screen of filter plate 32 is made of 304 stainless steel with a mesh size of 100 mesh (pore size 0.15mm). The activated carbon composite layer is made by mixing columnar activated carbon (particle size 2-3mm) with silica sol binder (concentration 30%) and coating it onto the surface of the filter screen. The coating thickness is 2-3mm, and it is cured by drying at 120℃ for 2 hours. This enhances the adsorption capacity for sulfur oxides and chlorides in flue gas and allows for quick replacement via the embedding groove 311 (replacement cycle 30 days / time).

[0045] Working principle: First, the flue gas to be treated enters the built-in groove 1211 of the middle frame 12 through the inlet pipe 121. The drive motor 131 on the motor frame 13 at the top of the middle frame 12 is powered on and started. The output end drives the drive rod 1311 to rotate. The three linkage frames 31 fixed on the outer wall of the drive rod 1311 rotate synchronously with it. The filter plate 32 installed in the groove 311 embedded in the linkage frame 31 rotates accordingly. Using centrifugal force and the interception effect of the filter material, the larger particulate impurities in the flue gas are initially filtered. The impurities are thrown to one side of the filter plate 32 for temporary storage. When the drive rod 1311 continues to rotate, the guide vanes 21 fixed at its bottom end rotate at high speed in the guide frame 2, cooperating with the built-in groove 1211. The bottom filter holes guide the pre-filtered flue gas downwards into the guide frame 2 (the bottom filter holes of the built-in groove 1211 in the middle frame 12 are circular through holes with a diameter of 5mm, arranged in an equilateral triangle with a hole spacing of 10mm, ensuring that the flue gas passage speed is ≥2m / s, while intercepting large particulate impurities with a particle size ≥5mm). Under the agitation of the guide blades 21, the flue gas forms a spiral downward airflow, using centrifugal force to further separate fine impurities. Subsequently, the airflow continues to flow downwards into the metal filter tube 5, where the filter material of the metal filter tube 5 performs deep filtration of the flue gas. After the device is started, the inner mounting frame 4, as the core support structure, is fixed to the inner wall of the treatment box 1, and the annular outer frame 41 on one side of its outer wall is connected to the treatment box 1. Box 1 forms a stable connection. After the built-in motor is powered on, the output end drives the rotating plate 42 to rotate within the pre-set rotating groove 411 of the annular outer frame 41. The rotating groove 411 limits the edge of the rotating plate 42 to ensure its stability during rotation. Since the rotating rod 421 is fixed to the outer wall of the rotating plate 42 near the edge, the centrifugal force generated when the rotating plate 42 rotates drives the rotating rod 421 to make circular motion, which in turn causes the bearing 46 fixedly installed thereto to move synchronously. The bearing 46 is rotatably connected inside the limiting frame 45. Under the constraint of its own rotation characteristics and the limiting frame 45, the circular motion is converted into linear motion, ultimately realizing the up-and-down reciprocating movement of the two embedded plates 44 within the fixed seat 43. The up-and-down movement of the embedded plate 44 directly drives the metal filter tube 5, which is fixedly connected between the two, to move synchronously. The top and bottom ends of the metal filter tube 5 are connected to the upstream and downstream pipelines through the corrugated pipe 53. The extensibility and flexibility of the corrugated pipe 53 ensure the continuity of the flue gas passage during the movement of the metal filter tube 5. When the metal filter tube 5 moves downward, the negative pressure pump 511 at its bottom contacts the trigger switch 52 fixed at the bottom of the inner wall of the treatment box 1. The trigger switch 52 closes to power on the negative pressure pump 511 and starts it. The generated negative pressure is conducted through the inside of the metal filter tube 5 to the top of the guide plate 51, which gathers the accumulated impurities towards the center and adsorbs them into the negative pressure pump 511, and finally discharges them through the pipeline.When the metal filter tube 5 moves upward, the negative pressure pump 511 separates from the trigger switch 52. The switch opens, and the negative pressure pump 511 stops working, completing one impurity removal cycle. Simultaneously, residual fine impurities are trapped inside the tube and settle to the top of the guide plate 51, awaiting removal when the negative pressure pump 511 starts. The entire process achieves dynamic operation of the filter components and intelligent triggering of the negative pressure pump 511 through mechanical transmission. Combined with the multi-stage filtration and spiral separation mechanism of the flue gas, a continuous impurity removal process is formed, providing a clean flue gas environment for the subsequent catalytic reaction of the precious metal catalyst and ensuring the long-term stable and efficient operation of the device.

[0046] Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A flue gas treatment device based on a precious metal catalyst, characterized in that, include: Processing box (1); An inner mounting bracket (4) is fixedly installed on the inner surface of the processing box (1). An annular outer frame (41) is fixedly installed on one side of the outer wall of the inner mounting bracket (4). A rotating groove (411) is preset inside the annular outer frame (411). A rotating plate (42) is rotatably connected to the inner surface of the rotating groove (411). A rotating rod (421) is fixedly installed on one side of the outer wall of the rotating plate (42). Two fixed seats (43) are fixedly connected to one side of the outer wall of the annular outer frame (41). An insert plate (44) is embedded in the interior of each of the two fixed seats (43). A limit frame (45) is fixedly connected between the opposite sides of the two insert plates (44). A bearing (46) is rotatably connected inside the limit frame (45). The rotating rod (421) is fixedly installed inside the bearing (46). A metal filter tube (5) is fixedly connected between the outer walls of the two embedded plates (44). A guide plate (51) is fixedly installed on the inner surface of the metal filter tube (5) near the bottom. A trigger switch (52) is in contact with the bottom side of the guide plate (51). The top and bottom of the metal filter tube (5) are both fixedly connected to a corrugated pipe (53), and the trigger switch (52) is fixedly installed on the bottom of the inner wall of the processing box (1). The top of the processing box (1) is fixedly connected to the middle frame (12), and the middle frame (12) has an internal slot (1211). A motor frame (13) is fixedly installed on the top of the middle frame (12), a drive motor (131) is fixedly installed on the top of the motor frame (13), a drive rod (1311) is fixedly connected to the rotating end of the drive motor (131), and a guide vane (21) is fixedly connected to the outer wall of the drive rod (1311). The outer wall of the drive rod (1311) is fixedly connected to three linkage frames (31), and each of the three linkage frames (31) has a pre-set embedding groove (311), and each of the three embedding grooves (311) has a filter plate (32) embedded in its inner wall.

2. The flue gas treatment device based on a noble metal catalyst according to claim 1, characterized in that: An inlet tube (121) is fixedly inserted inside the middle frame (12), and the output end of the inlet tube (121) is connected to the built-in slot (1211).

3. The flue gas treatment device based on a precious metal catalyst according to claim 1, characterized in that: The bottom of the middle frame (12) is fixedly connected to a flow guide frame (2), and the flow guide frame (2) is provided with flow guide blades (21).

4. The flue gas treatment device based on a noble metal catalyst according to claim 1, characterized in that: The outer wall of the processing box (1) is fixedly equipped with an outer support frame (11). The bottom end of the outer support frame (11) is in contact with the ground, and there are four outer support frames (11) arranged in a rectangular array on the outside of the processing box (1).

5. The flue gas treatment device based on a noble metal catalyst according to claim 1, characterized in that: The filter plate (32) adopts a composite layer structure of stainless steel filter mesh and activated carbon, and the thickness of the filter plate (32) is 5-10mm. Its surface is provided with uniformly distributed filter holes with a diameter of 0.1-0.5mm.

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