Device and method for preparing wide-temperature water-resistant high-pore honeycomb denitration catalyst

Abstract

The invention discloses a preparation device and method of a wide-temperature-range water-resistant high-pore honeycomb denitration catalyst, belongs to the technical field of denitration catalyst preparation, and solves the problems that in the prior art, a catalyst is long in retention time, cannot be pre-dried and is low in drying efficiency. A plurality of storage racks are arranged in the preheating bin in the horizontal direction at intervals. The drying bin is suspended, an opening is formed in the bottom of the drying bin, a lifter is arranged on the lower portion of the drying bin, and a dryer is arranged on the top of the lifter; and one end of the preheating pipeline communicates with the top of the drying bin, and the other end of the preheating pipeline communicates with the preheating bin. Dry hot air blown out by the dryer flows in the drying bin to dry a catalyst in the drying bin, and then the dry hot air flows into the preheating bin to preheat the catalyst in the preheating bin, so that the retention time of the catalyst in the drying bin is effectively shortened, and the drying efficiency is improved to the maximum extent.

Description

Technical Field

[0001] The present invention belongs to the technical field of denitration catalyst preparation, and in particular relates to a device and method for preparing a wide-temperature, water-resistant, high-porous honeycomb denitration catalyst. Background Art

[0002] Denitrification catalyst is a technology used to reduce the emission of nitrogen oxides in flue gas. It is widely used in the SCR denitrification system of power plants. It is a substance that causes the reducing agent to selectively react with nitrogen oxides in the flue gas at a certain temperature. Specifically, the denitrification catalyst is used to catalyze the reaction of ammonia (NH3) with NO x The gas reacts and converts it into nitrogen (N 2 ) and water vapor (H2O), thereby reducing emissions.

[0003] A Chinese patent document with the announcement number CN222560506U discloses a drying chamber for the production of wide-temperature SCR denitration catalysts, and specifically discloses a drying box and a fixed frame. The fixed frame is located on one side of the drying box, and a support rod is slidably connected to one side of the drying box. A sealing plate is fixedly connected to one side of the support rod. A dryer is fixedly installed on the upper surface of the drying box. One side of the fixed frame is fixedly connected to the sealing plate. The inner wall of the fixed frame is rotatably connected to a turntable, and the inner wall of the turntable is fixedly connected to a mounting frame. The staff places the catalyst on the mounting frame, and then supports and places the catalyst using the support frame. The elasticity of the spring drives the movable plate, movable rod, and supporting plate to move, and supports and fixes the catalyst, making it easy to fix and disassemble, thereby playing a supporting role and achieving the purpose of supporting.

[0004] Although the above patent achieves the purpose of clamping the catalyst, only one catalyst can be placed on the mounting frame, resulting in low overall drying efficiency. Summary of the Invention

[0005] The purpose of the present invention is to address the deficiencies in the prior art and to provide a device and method for preparing a wide-temperature, water-resistant, high-porous honeycomb denitrification catalyst that shortens catalyst residence time, achieves pre-drying, and has high drying efficiency.

[0006] In order to achieve the above technical objectives, the technical solutions adopted by the device and method for preparing the wide-temperature, water-resistant, high-porous honeycomb denitrification catalyst of the present invention are as follows: A preparation device for a wide-temperature, water-resistant, high-porous honeycomb denitrification catalyst comprises a drying unit, the drying unit comprising a preheating chamber, a plurality of storage racks arranged horizontally in the preheating chamber, the storage racks being used to store plate-shaped catalysts; A drying bin is suspended and has an opening at the bottom. A lift is provided at the bottom of the drying bin for lifting the storage rack into the drying bin. A dryer is provided on the top of the lift. A preheating pipe, one end of which is connected to the top of the drying chamber, and the other end of which is connected to the preheating chamber.

[0007] Optionally, it further comprises a steel platform, wherein the platform is provided with a mounting hole, and an outer wall of the drying bin is provided with a hanging ear, and the drying bin is inserted into the mounting hole and connected to the platform through the hanging ear; A slide rail is provided at the bottom of the platform, and the slide rail extends along the length direction of the preheating chamber and passes through the preheating chamber. A plurality of slides are provided on the slide rail, and the slides can slide on the slide rail. A supporting plate is provided on the top of the slide, and the storage rack is arranged on the top of the supporting plate.

[0008] Optionally, a feed port is provided on one side of the preheating bin, and a discharge port is provided on the other side of the preheating bin, and the slide plate, the supporting plate and the storage rack can slide into the preheating bin through the feed port and slide out of the preheating bin through the discharge port; The discharge port is provided with an openable and closable door panel, the door panel is provided with a plurality of air outlet pipes, and the preheating pipe is connected to the plurality of air outlet pipes.

[0009] Optionally, the preheating pipe is a flexible pipe.

[0010] Optionally, a water absorption box is provided on the preheating pipe, a water absorption resin is provided in the water absorption box, and the water absorption box is arranged on the platform.

[0011] Optionally, the elevator is arranged at the end of the slide rail, the top platform of the elevator can cover the opening, and the top of the elevator is provided with a through hole for installing a dryer, and the dryer can deliver dry hot air toward the inner top of the drying chamber.

[0012] Optionally, when the elevator is in the retracted state, the top of the elevator is flush with the slide rail.

[0013] Optionally, a circular notch is provided in the middle of the drying bin, the notch divides the drying bin into an upper bin body and a lower bin body, and a plurality of support rods are provided in the inner ring of the notch, the plurality of support rods being used to connect the upper bin body and the lower bin body; The outside of the drying chamber is provided with an air film and a cover shell from the inside to the outside, both of which wrap the gap. A negative pressure pipe is provided on the outer wall of the cover shell, and the negative pressure pipe is used to extract the gas between the air film and the cover shell.

[0014] A method for preparing a wide-temperature, water-resistant, high-porous honeycomb denitrification catalyst, which is applied to a device for preparing a wide-temperature, water-resistant, high-porous honeycomb denitrification catalyst, comprises the following steps: S1. Hoist the storage rack containing the catalyst onto the support plate, then place the support plate on the slide, and then push the slide to make the support plate and the storage rack slide into the inner side of the preheating chamber; S2. Slide a storage rack closest to the elevator out of the preheating chamber and use a forklift to forklift the support plate and the storage rack to the top of the elevator; S3. Push another storage rack into the preheating chamber according to the method of step S1. At the same time, the elevator is lifted upward. When the top of the elevator is in contact with the bottom of the drying chamber, the dryer starts working and the drying operation is completed. S4. The dry hot air blown out by the dryer is transported to the preheating bin through the preheating pipe and flows in the preheating bin to complete the preheating operation.

[0015] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, the dryer blows out dry hot air to flow in the drying chamber, thereby drying the catalyst in the drying chamber. The dry hot air then flows into the preheating chamber, thereby preheating the catalyst in the preheating chamber, effectively reducing the residence time of the catalyst in the drying chamber and maximizing the drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is an internal cross-sectional view of the drying chamber in the present invention.

[0017] In the figure: 1. Preheating chamber; 11. Feed port; 12. Discharge port; 13. Door panel; 14. Exhaust pipe; 2. Storage rack; 21. Slide plate; 22. Support plate; 3. Drying chamber; 31. Opening; 32. Hanging ear; 33. Notch; 34. Support rod; 35. Air film; 36. Cover; 37. Negative pressure pipe; 4. Elevator; 40. Through hole; 5. Dryer; 6. Preheating pipe; 60. Water absorption box; 7. Platform; 71. Mounting hole; 72. Slide rail. DETAILED DESCRIPTION

[0018] The invention is further described below with reference to the accompanying drawings and specific embodiments: like Figure 1 — Figure 2 As shown, a preparation device for a wide-temperature, water-resistant, high-porous honeycomb denitrification catalyst includes a drying unit, characterized in that the drying unit includes a preheating chamber 1, wherein a plurality of storage racks 2 are arranged at intervals along the horizontal direction in the preheating chamber 1, and the storage racks 2 are used to store plate-shaped catalysts; The drying bin 3 is suspended and has an opening 31 at the bottom. A lift 4 is provided at the bottom of the drying bin 3. The lift 4 is used to lift the storage rack 2 upward into the drying bin 3. A dryer 5 is provided on the top of the lift 4. The preheating pipe 6 has one end connected to the top of the drying chamber 3 and the other end connected to the preheating chamber 1 .

[0019] After the elevator 4 lifts the storage rack 2 into the drying chamber 3, the dryer 5 begins operation, delivering hot dry air into the drying chamber 3. The hot dry air sequentially dries the multiple catalysts on the storage rack 2, effectively improving drying efficiency. Furthermore, after drying the catalysts, the hot dry air enters the preheating chamber 1 through the preheating pipe 6, preheating the catalysts waiting to be dried in the preheating chamber 1. This reduces the residence time of the catalysts in the drying chamber 3, maximizes drying efficiency, and achieves energy conservation.

[0020] It also includes a steel platform 7, which is provided with a mounting hole 71, and a hanging ear 32 is provided on the outer wall of the drying bin 3. The drying bin 3 is inserted into the mounting hole 71 and connected to the platform 7 through the hanging ear 32; a slide rail 72 is passed through the bottom of the platform 7, and the slide rail 72 extends along the length direction of the preheating bin 1 and passes through the preheating bin 1. A plurality of slides 21 are provided on the slide rail 72, and the slides 21 can slide on the slide rail 72. A supporting plate 22 is provided on the top of the slide 21, and the storage rack 2 is arranged on the top of the supporting plate 22.

[0021] The drying bin 3 is hung in the mounting hole 71 of the platform 7 by the hanging ear 32, so that the height offset setting of the drying bin 3 and the preheating bin 1 is realized. In this way, when the slide 21 drives the supporting plate 22 and the storage rack 2 to slide to the outside of the elevator 4, the supporting plate 22 and the storage rack 2 can be forked onto the elevator 4 by a forklift, and then the supporting plate 22 and the storage rack 2 can be lifted into the drying bin 3 by the elevator 4, thereby realizing the convenience of the loading operation. In addition, during the loading process, the supporting plate 22 does not need to be flipped over, thereby ensuring that the catalyst can be stably placed on the storage rack 2.

[0022] A feed port 11 is provided on one side of the preheating bin 1, and a discharge port 12 is provided on the other side of the preheating bin 1. The slide 21, the supporting plate 22 and the storage rack 2 can slide into the preheating bin 1 through the feed port 11 and slide out of the preheating bin 1 through the discharge port 12; the discharge port 12 is provided with an openable and closable door panel 13, and a plurality of air outlet pipes 14 are provided on the door panel 13. The preheating pipe 6 is connected to the plurality of air outlet pipes 14.

[0023] The door panel 13 serves to seal the discharge port 12 , so that the gas discharged from the preheating pipe 6 can enter the preheating bin 1 from the discharge port 12 and then be discharged from the preheating bin 1 from the feed port 11 , thereby preheating the catalysts on the multiple storage racks 2 in the preheating bin 1 .

[0024] The preheating pipe 6 is a flexible pipe, so the door panel 13 can be installed by flipping it over to ensure that the supporting plate 22 and the storage rack 2 can slide out of the preheating chamber 1 smoothly without causing the preheating pipe 6 to be damaged.

[0025] The preheating pipe 6 is provided with a water absorption box 60, which contains a water-absorbing resin. The water absorption box 60 is mounted on the platform 7. In other words, the preheating pipe 6 is divided into two sections, one connected to the top of the water absorption box 60 and the other connected to the bottom of the water absorption box 60. This allows the moisture-rich dry hot air discharged from the drying chamber 3 to pass through the water-absorbing resin in the water absorption box 60, thereby removing moisture from the dry hot air and ensuring that the catalyst's moisture content is not increased during preheating. Furthermore, an air pump can be installed at any section of the preheating pipe 6 to increase the flow rate of the dry hot air within the preheating pipe 6.

[0026] Elevator 4 is positioned at the end of slide rail 72. Its top platform 7 covers opening 31. A through-hole 40 is provided at the top of elevator 4 for mounting a dryer 5, which delivers hot, dry air toward the top of the drying chamber 3. The integration of dryer 5 into elevator 4 ensures a relatively large opening 31, allowing for convenient entry into the drying chamber 3 from below.

[0027] When the elevator 4 is in the retracted state, the top of the elevator 4 is flush with the slide rail 72, which reduces the difficulty of transferring the support plate 22 and the storage rack 2 from the slide rail 72 to the elevator 4. Furthermore, a track docking with the slide rail 72 can also be set at the top of the elevator 4, so that the support plate 22 and the storage rack 2 can be directly pushed onto the elevator 4, thereby improving the efficiency of transferring the catalyst from the preheating chamber 1 to the drying chamber 3.

[0028] An annular notch 33 is provided in the middle of the drying bin 3, which divides the drying bin 3 into an upper bin body and a lower bin body. A number of support rods 34 are provided in the inner ring of the notch 33, and the support rods 34 are used to connect the upper bin body and the lower bin body; an air film 35 and a cover shell 36 are provided on the outside of the drying bin 3 from the inside to the outside, and both the air film 35 and the cover shell 36 wrap the notch 33. A negative pressure pipe 37 is provided on the outer wall of the cover shell 36, and the negative pressure pipe 37 is used to extract the gas between the air film 35 and the cover shell 36.

[0029] When the negative pressure tube 37 continuously extracts the gas between the air film 35 and the cover shell 36, the air film 35 will expand in the direction away from the support rod 34. At this time, the internal space of the drying chamber 3 becomes larger. When the negative pressure tube 37 is lowered or stops extracting air, the air film 35 will shrink in the direction close to the support rod 34. At this time, the internal space of the drying chamber 3 becomes larger. In this way, through the expansion and contraction of the air film 35, the dynamic adjustment of the internal space of the drying chamber 3 can be achieved, thereby realizing the multi-directional flow of dry hot air in the drying chamber 3, blowing towards the catalyst from different angles, completing a more three-dimensional and efficient drying operation of the catalyst, and effectively improving the drying efficiency.

[0030] This embodiment also discloses a method for preparing a wide-temperature, water-resistant, high-porous honeycomb denitrification catalyst.

[0031] A method for preparing a wide-temperature, water-resistant, high-porous honeycomb denitrification catalyst, which is applied to a device for preparing a wide-temperature, water-resistant, high-porous honeycomb denitrification catalyst, comprises the following steps: S1. Hoist the storage rack 2 containing the catalyst onto the supporting plate 22, then place the supporting plate 22 on the slide 21, and then push the slide 21 so that the supporting plate 22 and the storage rack 2 slide into the inner side of the preheating chamber 1; S2. Slide a storage rack 2 closest to the elevator 4 out of the preheating chamber 1 and use a forklift to forklift the support plate 22 and the storage rack 2 to the top of the elevator 4; S3. Push another storage rack 2 into the preheating chamber 1 according to the method of step S1. At the same time, the elevator 4 is lifted upward. When the top of the elevator 4 is in contact with the bottom of the drying chamber 3, the dryer 5 starts working to complete the drying operation. S4. The dry hot air blown out of the dryer 5 is transported to the preheating bin 1 through the preheating pipe 6 and flows in the preheating bin 1, completing the preheating operation.

[0032] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. All equivalent changes and modifications in the shape, structure, characteristics and spirit of the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A preparation device for a wide temperature range, water resistant, high-porous honeycomb denitrification catalyst, comprising a drying unit, characterized in that: The drying unit includes a preheating chamber, wherein a plurality of storage racks are arranged at intervals along the horizontal direction in the preheating chamber, and the storage racks are used to store plate-shaped catalysts; A drying bin is suspended and has an opening at the bottom. A lift is provided at the bottom of the drying bin for lifting the storage rack into the drying bin. A dryer is provided on the top of the lift. A preheating pipe, one end of which is connected to the top of the drying chamber, and the other end of which is connected to the preheating chamber.

2. The preparation device of the wide temperature and water-resistant high-porous honeycomb denitrification catalyst according to claim 1 is characterized in that: It also includes a steel platform with a mounting hole, a hanging ear on the outer wall of the drying bin, and the drying bin is inserted into the mounting hole and connected to the platform through the hanging ear; A slide rail is provided at the bottom of the platform, which extends along the length of the preheating chamber and passes through the preheating chamber. A plurality of slides are provided on the slide rail, which can slide on the slide rail. A supporting plate is provided on the top of the slide, and the storage rack is arranged on the top of the supporting plate.

3. The preparation device of the wide temperature range water-resistant high-porous honeycomb denitrification catalyst according to claim 2 is characterized by: A feed port is provided on one side of the preheating bin, and a discharge port is provided on the other side of the preheating bin. The slide plate, the supporting plate and the storage rack can slide into the preheating bin through the feed port and slide out of the preheating bin through the discharge port. The discharge port is provided with an openable and closable door panel, and a plurality of air outlet pipes are provided on the door panel. The preheating pipe is connected to the plurality of air outlet pipes.

4. The preparation device of the wide temperature range water-resistant high-porous honeycomb denitration catalyst according to claim 3 is characterized by: The preheating pipe is a flexible pipe.

5. The preparation device of the wide temperature and water-resistant high-porous honeycomb denitrification catalyst according to claim 3 is characterized by: A water absorption box is provided on the preheating pipeline, water absorption resin is provided in the water absorption box, and the water absorption box is arranged on the platform.

6. The preparation device of the wide temperature range water-resistant high-porous honeycomb denitration catalyst according to claim 5 is characterized by: The elevator is arranged at the end of the slide rail, the top platform of the elevator can cover the opening, and the top of the elevator is provided with a through hole for installing a dryer, and the dryer can transport dry hot air toward the inner top of the drying chamber.

7. The preparation device of the wide temperature range water-resistant high-porous honeycomb denitration catalyst according to claim 6 is characterized by: When the elevator is in the retracted state, the top of the elevator is flush with the slide rail.

8. The preparation device of the wide temperature range water-resistant high-porous honeycomb denitrification catalyst according to claim 7 is characterized in that: A circular notch is provided in the middle of the drying chamber, which divides the drying chamber into an upper chamber body and a lower chamber body. A plurality of support rods are provided in the inner ring of the notch, which are used to connect the upper chamber body and the lower chamber body. The outside of the drying chamber is provided with an air film and a cover shell from the inside to the outside, both of which cover the gap. A negative pressure pipe is provided on the outer wall of the cover shell, which is used to extract the gas between the air film and the cover shell.

9. A method for preparing a wide-temperature, water-resistant, high-porous honeycomb denitrification catalyst, applied to the preparation device for a wide-temperature, water-resistant, high-porous honeycomb denitrification catalyst according to claims 1-6, comprising the following steps: S1. Hoist the storage rack containing the catalyst onto the support plate, then place the support plate on the slide, and then push the slide to make the support plate and the storage rack slide into the inner side of the preheating chamber; S2. Slide a storage rack closest to the elevator out of the preheating chamber and use a forklift to forklift the support plate and the storage rack to the top of the elevator; S3. Push another storage rack into the preheating chamber according to the method of step S1. At the same time, the elevator is lifted upward. When the top of the elevator is in contact with the bottom of the drying chamber, the dryer starts working and the drying operation is completed. S4. The dry hot air blown out by the dryer is transported to the preheating bin through the preheating pipe and flows in the preheating bin to complete the preheating operation.

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