Catalyst production system for catalytic combustion of VOCs

Abstract

The invention discloses a catalyst production system for VOCs catalytic combustion, and relates to the technical field of catalyst preparation, the catalyst production system comprises a material mixing device, the material mixing device comprises a material mixing barrel, the upper end of the material mixing barrel is provided with a barrel cover, and the barrel cover is provided with a liquid injection pipe and a feeding pipe; the stirring mechanism comprises a stirring driving assembly and stirring blades, and the output end of the stirring driving assembly is in transmission connection with the stirring blades; the material extruding mechanism comprises a material extruding barrel and a material extruding driving assembly, the output end of the material extruding driving assembly is in transmission connection with the material extruding barrel, the material extruding barrel is located in the material mixing barrel, the stirring blades are located in the material extruding barrel, the area between the stirring blades and the material mixing barrel is a material extruding area, and the position of the upper end face of the material extruding barrel is lower than the position of the liquid level in the material mixing barrel; the extruding barrel eccentrically rotates in the extruding area, and the rotating axis of the stirring blades is consistent with the rotating axis of the extruding barrel; according to the system, materials before hydrothermal reaction can be uniformly mixed, and the preparation efficiency of the catalyst is ensured.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of catalyst preparation, and particularly relates to a catalyst production system for VOCs catalytic combustion. BACKGROUND

[0002] Volatile organic compounds (VOCs) in industrial waste gas seriously affect the atmospheric environment and human health, so controlling the pollution caused by VOCs is a main index of atmospheric pollution prevention and control. Among them, petrochemical, printing, electronics, coating, tobacco and pharmaceutical industries are the leading industries of VOCs emission. With the continuous development of science and technology, while ensuring the rapid development of industrial economy, the emission standard of VOCs is also getting higher and higher, and recycling and destruction technology is needed.

[0003] At present, the treatment method of VOCs is mostly combined with adsorption-catalytic combustion treatment technology. The key to improving the efficiency of catalytic combustion treatment of VOCs is to prepare high-efficiency catalysts. For example, the patent with the patent application number 202210432968.6 and the patent name of a preparation method of a catalyst for catalytic combustion of VOCs and its product discloses a catalyst product for catalytic combustion of VOCs. The catalyst is first prepared by a hydrothermal method to prepare gallium oxide, then copper source, cerium source, urea, polyvinylpyrrolidone and other substances are added, and the gallium oxide catalyst modified by copper and cerium is obtained by hydrothermal reaction again. The two-step hydrothermal reaction can significantly improve the crystal form of the catalyst, promote the increase of the specific surface area of the catalyst, and through the modification of copper and cerium, the catalytic combustion performance of gallium oxide can be significantly improved, and the purification of VOCs can be effectively improved. It can be seen that in the catalyst preparation process, the hydrothermal reaction is one of the important preparation processes, and the mixing uniformity of the materials before the hydrothermal reaction will greatly affect the efficiency of the subsequent hydrothermal reaction in the reaction kettle, thereby affecting the preparation efficiency of the catalyst. SUMMARY

[0004] The purpose of the present application is to provide a catalyst production system for VOCs catalytic combustion with simple structure and reasonable design to solve the above problems.

[0005] The present application achieves the above-mentioned purposes through the following technical solutions: A catalyst production system for VOCs catalytic combustion, comprising a mixing device, the mixing device comprising: a mixing barrel, the upper end of the mixing barrel is provided with a barrel cover, the barrel cover is respectively provided with a liquid injection pipe and a feeding pipe, the liquid injection pipe is used for injecting liquid raw materials into the mixing barrel, and the feeding pipe is used for feeding powder raw materials into the mixing barrel; A stirring mechanism, comprising a stirring drive assembly and a stirring blade, wherein the output end of the stirring drive assembly is connected to the stirring blade in a driving connection, and the stirring blade is located in a mixing tank; The extrusion mechanism includes an extrusion cylinder and an extrusion drive assembly. The output end of the extrusion drive assembly is connected to the extrusion cylinder, which is located in a mixing tank. A stirring blade is also located in the extrusion cylinder. The area between the stirring blade and the mixing tank is the extrusion area. The upper end face of the extrusion cylinder is lower than the liquid level in the mixing tank. The extrusion cylinder rotates eccentrically in the extrusion area, and the rotation axis of the stirring blade is aligned with the rotation axis of the extrusion cylinder.

[0006] As a further optimization of the present invention, the edge of the bucket lid is provided with a plurality of lugs, and a hanging rod is rotatably installed on the outside of the mixing bucket. The hanging rod is correspondingly arranged with the lugs. The outer end of the hanging rod has a threaded part, and the threaded part of the hanging rod is threadedly connected to a fastening nut. When the bucket lid and the mixing bucket lid are closed together, the threaded part of the hanging rod is engaged in the groove of the lug, and the lower end of the fastening nut abuts against the lug.

[0007] As a further optimization of the present invention, a knob is provided on the outside of the fastening nut.

[0008] As a further optimization of the present invention, the stirring drive assembly includes a stirring drive component, a first main shaft, and a support rod. The stirring drive component is disposed at the lower outer end of the mixing tank. The output end of the stirring drive component is connected to the first main shaft. The first main shaft passes through the mixing tank and is rotatably connected to the mixing tank. A support rod is fixedly connected to one side of the first main shaft located in the mixing tank, and a stirring blade is fixedly connected to the support rod.

[0009] As a further optimization of the present invention, the stirring blade has a spiral structure, and along the rotation direction of the stirring blade, the axial height of the spiral trajectory of the stirring blade decreases continuously from the upper end to the lower end of the stirring blade.

[0010] As a further optimization of the present invention, the extrusion drive assembly includes an extrusion drive component, a second main shaft, a swing arm, and a base. The extrusion drive component is disposed on the barrel cover. The output end of the extrusion drive component is drivenly connected to the second main shaft. The second main shaft passes through the barrel cover and is rotatably connected to the barrel cover. The end of the second main shaft located in the mixing barrel is fixedly connected to the swing arm. The swing arm is drivenly connected to the base. The end of the base facing the extrusion cylinder is fixedly connected to the bracket. The bracket is fixedly connected to the extrusion cylinder. Under the drive of the extrusion drive component, the extrusion cylinder rotates eccentrically in the extrusion area.

[0011] As a further optimization of the present invention, a gear is rotatably connected to the end of the swing arm away from the second main shaft, the gear meshes with a gear ring, the gear ring is fixedly mounted on the barrel cover, and a base is fixedly connected to the lower end of the gear.

[0012] As a further optimization of the present invention, multiple supports are provided, and the multiple supports are evenly distributed circumferentially at the upper end of the extrusion cylinder.

[0013] As a further optimization of the present invention, a feeding cover is provided at the opening of the feeding pipe.

[0014] As a further optimization of the present invention, a discharge pipe is provided at the lower end of the mixing tank, and a control valve is provided on the discharge pipe to control the opening and closing of the discharge pipe.

[0015] The present invention has at least the following beneficial effects: The present invention provides a catalyst production system for VOCs catalytic combustion, including a mixing device, which includes a mixing tank, a stirring mechanism, and an extrusion mechanism. The stirring mechanism uses stirring blades in the stirring tank to radially stir the material, and the extrusion mechanism includes an extrusion cylinder and an extrusion drive assembly. The extrusion cylinder is located in the mixing tank, and the stirring blades are located in the extrusion cylinder. Driven by the extrusion drive assembly, the extrusion cylinder rotates eccentrically in the extrusion area. The extrusion cylinder extrudes and pushes the material in front of it in the direction of rotation. Since the upper end of the extrusion cylinder is lower than the liquid level in the mixing tank, the material in front is not only pushed forward, but also surges towards the upper end of the extrusion cylinder. As the extrusion cylinder rotates eccentrically, the space behind the extrusion cylinder tends to increase, so that the material in the extrusion cylinder passes over the extrusion cylinder and fills the increased space, thereby realizing the surging and mixing of the material along the radial direction of the mixing tank, that is, realizing the flow of material in the inner and outer areas of the extrusion cylinder and avoiding mixing dead zones. When the extrusion cylinder moves eccentrically, it generates a continuous squeezing force on the material in front, which can directly break up the soft agglomerates formed by the powder in the liquid, and disperse the blocky or flocculent powder into smaller particles, which helps to achieve uniform mixing of the material. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is the invention Figure 1 A schematic diagram of the front structure; Figure 3 This is the invention Figure 2 A partial sectional view of the structure; Figure 4 This is a partial structural schematic diagram of the extrusion mechanism and the mixing mechanism of the present invention; Figure 5 This is a top view schematic diagram of the extrusion mechanism of the present invention. Figure 1 ; Figure 6 This is a top view schematic diagram of the extrusion mechanism of the present invention. Figure 2 ; Figure 7 This is a partial structural schematic diagram of the stirring mechanism of the present invention.

[0017] In the diagram: 1. Mixing tank; 11. Tank lid; 12. Hanging rod; 121. Lug; 122. Fastening nut; 13. Liquid injection pipe; 14. Feeding cover; 15. Discharge pipe; 2. Extrusion mechanism; 21. Extrusion drive component; 22. Extrusion cylinder; 23. Support; 24. Base; 25. Gear ring; 26. Gear; 27. Swing arm; 28. Second main shaft; 3. Stirring mechanism; 31. Stirring drive component; 32. Stirring blade; 33. Support rod; 34. First main shaft. Detailed Implementation

[0018] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0019] like Figure 1 and Figure 3 As shown, the present invention provides a catalyst production system for VOCs catalytic combustion, comprising a mixing device, the mixing device including: A mixing tank 1 is provided with a lid 11 at the upper end of the mixing tank 1. A liquid injection pipe 13 and a feeding pipe are respectively provided on the lid 11. The liquid injection pipe 13 is used to inject liquid raw materials into the mixing tank 1, and the feeding pipe is used to feed powder raw materials into the mixing tank 1. The opening of the feeding pipe is provided with a feeding cover 14 to facilitate the feeding of powder raw materials into the mixing tank 1. After feeding, the feeding pipe can be sealed with the feeding cover 14. The stirring mechanism 3 includes a stirring drive assembly and a stirring blade 32. The output end of the stirring drive assembly is connected to the stirring blade 32 in a transmission manner. The stirring blade 32 is located in the mixing tank 1. The extrusion mechanism 2 includes an extrusion cylinder 22 and an extrusion drive assembly. The output end of the extrusion drive assembly is drivenly connected to the extrusion cylinder 22. The extrusion cylinder 22 is located in the mixing tank 1, and the stirring blade 32 is located in the extrusion cylinder 22. The area between the stirring blade 32 and the mixing tank 1 is the extrusion area. Figure 5 As shown, the long dashed line indicates the boundary position of the mixing tank 1, and the short dashed line indicates the boundary position of the stirring blade 32. The area between the two is the extrusion area. The upper end of the extrusion cylinder 22 is lower than the liquid level in the mixing tank 1. The extrusion cylinder 22 rotates eccentrically in the extrusion area, and the rotation axis of the stirring blade 32 is consistent with the rotation axis of the extrusion cylinder 22.

[0020] After the liquid and powder raw materials required for the hydrothermal reaction are respectively injected into the mixing tank 1 through the injection pipe 13 and the feeding pipe, they are stirred by the stirring blade 32. Under the drive of the extrusion drive assembly, the extrusion cylinder 22 rotates eccentrically in the extrusion area. Taking the clockwise rotation direction as an example, the extrusion cylinder 22 squeezes and pushes the material in front of the rotation direction. Since the upper end of the extrusion cylinder 22 is lower than the liquid level in the mixing tank 1, the material in front is not only pushed forward, but also surges towards the upper end of the extrusion cylinder 22. As the extrusion cylinder 22 rotates eccentrically clockwise, the space behind the extrusion cylinder 22 tends to increase, so that the material in the extrusion cylinder 22 crosses the extrusion cylinder 22 and fills the increased space, thereby realizing the surging and mixing of the material along the radial direction of the mixing tank 1, that is, realizing the flow of material in the inner and outer areas of the extrusion cylinder 22 and avoiding mixing dead zones. Moreover, when the extrusion cylinder 22 moves eccentrically, it generates a continuous extrusion thrust on the material in front (especially the solid-liquid mixture containing solid powder involved in this application), which can directly break up the soft agglomerates formed by the powder in the liquid, disperse the blocky or flocculent powder into smaller particles, which helps to achieve uniform mixing of the material. This ensures the efficiency of the hydrothermal reaction when the uniformly mixed material is transported to the hydrothermal reaction equipment to participate in the hydrothermal reaction, thereby improving the catalyst preparation efficiency.

[0021] It should be noted that, as Figure 1 and Figure 2 As shown, the edge of the bucket lid 11 is provided with multiple lugs 121. A hanging rod 12 is rotatably installed on the outside of the mixing bucket 1. The hanging rod 12 is correspondingly arranged with the lugs 121. The outer end of the hanging rod 12 has a threaded part, and the threaded part of the hanging rod 12 is threadedly connected to a fastening nut 122. When the bucket lid 11 is closed with the mixing bucket 1, the threaded part of the hanging rod 12 is engaged in the groove of the lug 121, and the lower end of the fastening nut 122 abuts against the lug 121. For example, the fastening nut 122 is provided with a knob on the outside, which makes it easy for the operator to operate the fastening nut 122. By tightening the fastening nut 122 against the lug 121, the bucket lid 11 is sealed tightly on the mixing bucket 1. The bucket lid 11 is also provided to facilitate the subsequent opening of the mixing bucket 1 for inspection and cleaning.

[0022] Continue to refer to Figure 1 The lower end of the mixing tank 1 is provided with a discharge pipe 15, and a control valve is provided on the discharge pipe 15. The control valve is used to control the opening and closing of the discharge pipe 15. After the mixture is evenly mixed, the control valve can be controlled to open the discharge pipe 15, so that the evenly mixed material in the mixing tank 1 can be transported to the hydrothermal reaction equipment.

[0023] For example, see [link to relevant documentation]. Figure 3 , Figure 4 and Figure 7The stirring drive assembly includes a stirring drive component 31, a first main shaft 34, and a support rod 33. The stirring drive component 31 is disposed at the lower outer end of the mixing tank 1. For example, the stirring drive component 31 is a motor. The output end of the stirring drive component 31 is connected to the first main shaft 34. The first main shaft 34 passes through the mixing tank 1 and is rotatably connected to the mixing tank 1. The support rod 33 is fixedly connected to one side of the first main shaft 34 located in the mixing tank 1. A stirring blade 32 is fixedly connected to the support rod 33.

[0024] For example, the stirring blade 32 has a helical structure, and along the rotation direction of the stirring blade 32, the axial height of the helical trajectory of the stirring blade 32 continuously decreases from the upper end to the lower end of the stirring blade 32. Figure 7 The stirring blade 32 has a spiral structure, and the stirring blade 32 rotates in a clockwise direction. At this time, the axial height of the spiral trajectory of the stirring blade 32 decreases continuously from the upper end to the lower end of the stirring blade 32.

[0025] For example, see [link to relevant documentation]. Figure 3 and Figure 4 The extrusion drive assembly includes an extrusion drive component 21, a second main shaft 28, a swing arm 27, and a base 24. The extrusion drive component 21 is mounted on the barrel cover 11. For example, the extrusion drive component 21 is a motor. The output end of the extrusion drive component 21 is connected to the second main shaft 28. The second main shaft 28 passes through the barrel cover 11 and is rotatably connected to the barrel cover 11. The end of the second main shaft 28 located in the mixing barrel 1 is fixedly connected to the swing arm 27. The swing arm 27 is connected to the base 24. The end of the base 24 facing the extrusion cylinder 22 is fixedly connected to the bracket 23. The bracket 23 is fixedly connected to the extrusion cylinder 22. Under the drive of the extrusion drive component 21, the extrusion cylinder 22 rotates eccentrically in the extrusion area.

[0026] Among them, the end of the swing arm 27 away from the second main shaft 28 is rotatably connected to a gear 26, the gear 26 meshes with a gear ring 25, the gear ring 25 is fixedly mounted on the barrel cover 11, and the lower end of the gear 26 is fixedly connected to a base 24.

[0027] Continue reading Figure 5 and Figure 6 The extrusion cylinder 22 rotates eccentrically in the extrusion area between the long and short dotted lines. The second main shaft 28 drives the swing arm 27 to rotate clockwise, and the swing arm 27 drives the gear 26 to revolve clockwise. At the same time, the gear 26 is meshed and constrained by the gear ring 25, causing the gear 26 to rotate counterclockwise. That is, the gear 26 performs a compound motion of revolving around the second main shaft 28 and rotating around its own rotation axis, which causes the base 24 under the gear 26 to move synchronously. Finally, the compound motion of the extrusion cylinder 22 is realized, which makes the extrusion cylinder 22 roll along the side wall of the mixing barrel 1, promoting the extrusion of the material between the extrusion cylinder 22 and the mixing barrel 1.

[0028] It should be noted that multiple supports 23 are provided, and the multiple supports 23 are evenly distributed circumferentially at the upper end of the extrusion cylinder 22. For example... Figure 4 As shown, the number of supports 23 is two. In other embodiments, the number of supports 23 can be set to three, four, five, etc., which is not limited here, so that the base 24 can drive the extrusion cylinder 22 to rotate smoothly through the supports 23.

[0029] It should be noted that the catalyst production system for VOCs catalytic combustion includes a mixing device. In use, liquid raw materials and powder raw materials are respectively fed into the mixing tank 1 through the liquid injection pipe 13 and the feeding pipe. The stirring drive 31 is started. The stirring drive 31 drives the stirring blade 32 to rotate through the first main shaft 34 to stir and mix the materials in the extrusion cylinder 22. Simultaneously, the extrusion drive 21 is activated, which drives the second main shaft 28 to rotate. The second main shaft 28 then drives the swing arm 27 to rotate clockwise (towards...). Figure 5 (Taking the orientation shown as an example) When the swing arm 27 rotates, it drives the gear 26 to revolve clockwise. At the same time, the gear 26 is meshed and constrained by the gear ring 25, causing the gear 26 to rotate counterclockwise. That is, the gear 26 performs a compound motion of revolving around the second main shaft 28 and rotating around its own rotation axis. This causes the base 24 under the gear 26 to move synchronously, ultimately realizing the compound motion of the extrusion cylinder 22. This causes the extrusion cylinder 22 to roll along the side wall of the mixing barrel 1, promoting the extrusion and propulsion of the material in front of the rotation direction of the extrusion cylinder 22. It can directly break up soft agglomerates formed by powder in liquid, dispersing lumpy or flocculent powder into smaller particles, which helps to achieve uniform mixing of materials. Moreover, it not only pushes the material in front forward, but also surges towards the upper end of the extrusion cylinder 22, and the material between it and the mixing tank 1 is squeezed. Furthermore, the space behind the extrusion cylinder 22 tends to increase, so that the material in the extrusion cylinder 22 passes over the extrusion cylinder 22 and fills into the increased space, thereby realizing the surging and mixing of materials along the radial direction of the mixing tank 1 and avoiding mixing dead zones.

[0030] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A catalyst production system for the catalytic combustion of VOCs, characterized in that, Includes a mixing device, the mixing device comprising: A mixing tank is provided with a lid at the top. The lid is provided with an injection pipe and a feeding pipe. The injection pipe is used to inject liquid raw materials into the mixing tank, and the feeding pipe is used to feed powder raw materials into the mixing tank. A stirring mechanism, comprising a stirring drive assembly and a stirring blade, wherein the output end of the stirring drive assembly is connected to the stirring blade in a driving connection, and the stirring blade is located in a mixing tank; The extrusion mechanism includes an extrusion cylinder and an extrusion drive assembly. The output end of the extrusion drive assembly is connected to the extrusion cylinder, which is located in a mixing tank. A stirring blade is also located in the extrusion cylinder. The area between the stirring blade and the mixing tank is the extrusion area. The upper end face of the extrusion cylinder is lower than the liquid level in the mixing tank. The extrusion cylinder rotates eccentrically in the extrusion area, and the rotation axis of the stirring blade is aligned with the rotation axis of the extrusion cylinder.

2. The catalyst production system for VOCs catalytic combustion according to claim 1, characterized in that, The edge of the bucket lid is provided with multiple lugs. A hanging rod is rotatably installed on the outside of the mixing bucket. The hanging rod is correspondingly arranged with the lugs. The outer end of the hanging rod has a threaded part, and the threaded part of the hanging rod is threadedly connected to a fastening nut. When the bucket lid and the mixing bucket lid are closed together, the threaded part of the hanging rod is engaged in the groove of the lug, and the lower end of the fastening nut abuts against the lug.

3. A catalyst production system for VOCs catalytic combustion according to claim 2, characterized in that, A knob is provided on the outside of the fastening nut.

4. The catalyst production system for VOCs catalytic combustion according to claim 1, characterized in that, The stirring drive assembly includes a stirring drive component, a first main shaft, and a support rod. The stirring drive component is located at the lower outer end of the mixing tank. The output end of the stirring drive component is connected to the first main shaft. The first main shaft passes through the mixing tank and is rotatably connected to the mixing tank. A support rod is fixedly connected to one side of the first main shaft located in the mixing tank. A stirring blade is fixedly connected to the support rod.

5. A catalyst production system for VOCs catalytic combustion according to claim 4, characterized in that, The stirring blade has a spiral structure, and along the rotation direction of the stirring blade, the axial height of the spiral trajectory of the stirring blade decreases continuously from the upper end to the lower end of the stirring blade.

6. A catalyst production system for VOCs catalytic combustion according to claim 4, characterized in that, The extrusion drive assembly includes an extrusion drive component, a second main shaft, a swing arm, and a base. The extrusion drive component is mounted on the barrel lid. The output end of the extrusion drive component is driven by the second main shaft, which passes through the barrel lid and is rotatably connected to it. The end of the second main shaft located in the mixing barrel is fixedly connected to the swing arm, which is driven by the base. The end of the base facing the extrusion cylinder is fixedly connected to a bracket, which is fixedly connected to the extrusion cylinder. Under the drive of the extrusion drive component, the extrusion cylinder rotates eccentrically in the extrusion area.

7. A catalyst production system for VOCs catalytic combustion according to claim 6, characterized in that, The end of the swing arm away from the second main shaft is rotatably connected to a gear, which meshes with a gear ring. The gear ring is fixedly mounted on the barrel cover, and the lower end of the gear is fixedly connected to a base.

8. A catalyst production system for VOCs catalytic combustion according to claim 7, characterized in that, Multiple supports are provided, and the multiple supports are evenly distributed circumferentially at the upper end of the extrusion cylinder.

9. A catalyst production system for VOCs catalytic combustion according to claim 1, characterized in that, The opening of the feeding pipe is equipped with a feeding cover.

10. A catalyst production system for VOCs catalytic combustion according to claim 1, characterized in that, The mixing tank is equipped with a discharge pipe at its lower end, and a control valve is installed on the discharge pipe to control the opening and closing of the discharge pipe.

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