A NOx-CO collaborative treatment composite catalyst and its preparation method and drying device

Abstract

The present invention discloses a NOx-CO co-processing composite catalyst and its preparation method and drying device, including a NOx-CO co-processing composite catalyst, which is made of ammonium metavanadate, ammonium metatungstate, copper nitrate and titanium dioxide, and the weight ratio is 4:3:7:112. It also includes a preparation method of the NOx-CO co-processing composite catalyst, the steps of which are to mix and stir a variety of raw materials, then perform ultrasonic impregnation, filtration, drying and roasting. It also includes a drying device for the NOx-CO co-processing composite catalyst, which can dry the filtered filter cake. The beneficial effects of the present invention are that the denitration efficiency of the NOx-CO co-processing composite catalyst can reach more than 95%; the removal rate of CO can reach more than 70%; the conversion rate of SO2 and SO3 is less than 1%; the chemical life should be greater than 24,000 hours, and the drying device can adjust the spacing between the holding channels to facilitate loading and unloading, improve work efficiency, and save space.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental protection, and more particularly to a NOx-CO collaborative treatment composite catalyst, a preparation method thereof, and a drying device. Background Art

[0002] Nitrogen oxide (NOx) pollution control is currently the most urgent task in my country's atmospheric pollution control field. At the same time, the emission of some unconventional pollutants (such as CO, VOCs, etc.) has gradually attracted attention. Among them, carbon monoxide (CO) has become the focus of attention because it easily combines with hemoglobin, which carries oxygen in the blood. At extremely low concentrations, it can cause hypoxic damage to humans or animals. In mild cases, it can cause dizziness and headaches. In severe cases, it can cause permanent damage to brain cells and even suffocation and death.

[0003] The steel industry is one of the main sources of CO, and the CO emitted mainly comes from the following three aspects: First, CO produced by incomplete combustion of coal, coke, blast furnace gas, and converter gas during the combustion process of sintering machines, blast furnace hot blast furnaces, steel rolling heating furnaces, lime kilns, and self-contained power plants; second, CO emitted during the blast furnace charging pressure equalization and venting, blast furnace wind-down and steel rolling heating furnace back-blowing gas production operations; third, CO emitted from blast furnace gas and converter gas in the absence of downstream gas users. At present, the main end-of-pipe treatment technologies for CO in sintering flue gas of steel enterprises are: direct combustion method, cryogenic separation method, solution absorption method, adsorption method and oxidation method. Except for the oxidation method, the above technologies have the disadvantages of high ignition temperature, which makes them difficult to be directly burned and cannot be effectively decomposed. At the same time, SCR technology is commonly used to control nitrogen oxides (NOx) in sintering flue gas. In order to ensure the denitrification efficiency, the SCR device needs to be heated, which will consume a lot of energy and substances while also producing a large amount of CO2 emissions. Iron and steel companies are currently in urgent need of a technology that can efficiently control CO in sintering flue gas and provide heat for the SCR denitrification device to reduce energy consumption. In order to better solve the problems of the above technologies, a comprehensive catalytic heating solution has been developed. While meeting the needs of efficient CO control, the heat generated in the control process can be used in other links that need to be heated in flue gas control. It is a control technology that truly achieves energy conservation and emission reduction. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a NOx-CO collaborative treatment composite catalyst, a preparation method thereof, and a drying device, thereby effectively treating exhaust gas.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A NOx-CO collaborative treatment composite catalyst is prepared from ammonium metavanadate, ammonium metatungstate, copper nitrate and titanium dioxide.

[0007] Furthermore, the titanium dioxide only serves as a carrier and does not play a catalytic role.

[0008] Furthermore, the mass ratio of the ammonium metavanadate, ammonium metatungstate, copper nitrate and titanium dioxide is 4:3:7:112.

[0009] The method for preparing a NOx-CO collaborative treatment composite catalyst according to any one of claims 1 to 3 comprises the following steps:

[0010] Step 1: Place ammonium metavanadate, ammonium metatungstate and copper nitrate in a constant temperature water bath at a mass ratio of 4:3:7, add the same mass of deionized water, heat and stir to prepare a VW-Cu active solution;

[0011] Step 2: Add 8 times the mass of titanium dioxide to the above solution, continue stirring, then put it into an ultrasonic device for ultrasonic immersion, filter the solution to obtain a filter cake;

[0012] Step 3: Dry the filter cake in a drying device, and then place it in a muffle furnace for calcination to obtain a NOx-CO synergistic treatment composite low-temperature denitration catalyst, wherein the mass ratio of V2O5, WO3, and CuO loaded in the NOx-CO synergistic treatment composite low-temperature denitration catalyst is 1:1:1, and V2O5, WO3, and CuO account for 1.5% to 2.5% of the total mass.

[0013] Furthermore, the heating temperature in step 1 is 60-80° C., and the stirring time is 8-10 minutes.

[0014] Furthermore, in step 2, the stirring time is 8-10 minutes, and the ultrasonic immersion time is 25-30 minutes.

[0015] Furthermore, in step 3, the temperature of the drying device is 105° C., the drying time is 6 hours, the temperature of the muffle furnace is 500° C., and the roasting time is 5 hours.

[0016] A drying device for a NOx-CO collaborative processing composite catalyst according to any one of claims 1 to 3, comprising a holding platform, a drying channel installed at the upper end of the holding platform, heat insulation curtains installed on both sides of the drying channel, a feeding mechanism installed on the holding platform, and a drying mechanism installed on the holding platform;

[0017] The loading platform is connected with the loading platform of the loading platform, and the loading platform is connected with the loading platform of the loading platform to the loading platform.

[0018] The drying mechanism includes multiple rotating shafts in the holding channel, the rotating shafts are located in the space separated by the transverse partitions, and each layer of space is provided with two rotating shafts. Multiple circular holes are opened on the longitudinal partitions, and the rotating shafts pass through the longitudinal partitions from the circular holes. Multiple first rolling bearings are installed on the surfaces of both sides of the holding channel, and the rotating shafts extend from the first rolling bearings to the outside of the holding channel. First gears are installed at both ends of the rotating shaft on the rear side of the holding channel. Multiple first racks are evenly distributed and installed in the drying channel, and the first rack can be engaged with the first gear from below the first gear. A second rack installed in the holding channel is provided on one side of the first rack, and the second rack can be engaged with the first gear from above the first gear. The first rack and the second rack are staggered and have the same spacing. A fixed protective plate installed on the transverse partition is provided on the front side of the holding space, and a rotating protective plate installed on the transverse partition is provided on the rear side of the fixed protective plate.

[0019] Furthermore, the driving frame includes a plurality of rotating rods located on both sides of the drying channel, and second rolling bearings are installed at both ends of the rotating rod, the second rolling bearing at the upper end is installed at the upper end of the drying channel, and the second rolling bearing at the lower end is installed on the holding table, and a second gear is installed on the rotating rod, and third racks are installed on the surfaces of both sides of the holding channel, and the third rack can mesh with the second gear. Adjacent rotating rods are connected through a transmission mechanism, and a transmission rod is installed on the upper end of the rotating rod located at the starting end of the drying channel, and the transmission rod passes through the drying channel and extends above the drying channel. A rotating motor is installed on one side of the upper end of the drying channel, and a first bevel gear is installed on the rotating end of the rotating motor. A second bevel gear is provided on one side of the first bevel gear installed on the upper end of the transmission rod, and the first bevel gear and the second bevel gear are meshed. A first sprocket is installed on the upper end of the transmission rod, and the two first sprockets are connected by a first chain. The transmission mechanism includes a second sprocket installed on the upper end of the rotating rod, and adjacent second sprockets are connected by a second chain.

[0020] Furthermore, the rotating protective plate includes a rotating plate connected to the transverse partition by a hinge, a plurality of fixed plates installed on the transverse partition are provided on the inner side of the rotating plate, a limiting spring is installed on the surface of the fixed plate close to the rotating plate, an L-shaped support rod installed on the outer side of the rotating plate is provided, the rotating plate is tilted on the L-shaped support rod, and support wheels are installed at both ends of the front surface of the fixed protective plate. When the two holding channels are close, the support wheels can push the rotating plate to a vertical position.

[0021] The beneficial effects of the present invention are as follows: the selective catalytic reduction method has been widely used due to its low reaction temperature, high purification efficiency, reliable operation and low secondary pollution. The catalyst is the core of the SCR flue gas denitrification system, and its performance directly affects the overall denitrification effect of the SCR flue gas denitrification system. As a harmful gas component in the flue gas, CO also has reducing ability. Using it as a reducing agent in the denitrification system can simultaneously achieve the removal of NOx and CO. The denitrification efficiency of the NOx-CO synergistic treatment composite catalyst can reach more than 95%; the CO removal rate can reach more than 70%; the SO2 and SO3 conversion rates are less than 1%; and the chemical life should be greater than 24,000 hours.

[0022] The driving frame can drive the holding rack into the drying channel for drying. When the holding rack moves, the distance between the holding channels can be increased, which makes it easier to place the filter cake in the holding space and facilitate loading and unloading. After the holding channels enter the drying channel, the distance between the holding channels can be reduced, thereby reducing the space they occupy. The filter cake can be limited by the fixed protective plate and the rotating protective plate to prevent it from falling due to vibration. The contact position of the rotating shaft and the filter cake can be changed by rotating the rotating shaft, thereby improving the drying speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic flow chart of a method for preparing a NOx-CO collaborative treatment composite catalyst according to the present invention;

[0024] Figure 2 This is a schematic structural diagram of a drying device for a NOx-CO collaborative processing composite catalyst according to the present invention;

[0025] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle;

[0026] Figure 4 yes Figure 2 A partial enlarged view of point B in the middle;

[0027] Figure 5 yes Figure 2 A partial enlarged view of point C in the middle;

[0028] Figure 6 It is a partial cross-sectional schematic diagram of a drying device for a NOx-CO collaborative treatment composite catalyst according to the present invention, viewed from above;

[0029] Figure 7 yes Figure 6 A partial enlarged view of point D in the middle;

[0030] Figure 8 It is a schematic cross-sectional view from the side of a drying device for a composite catalyst for NOx-CO collaborative treatment according to the present invention;

[0031] Figure 9 yes Figure 8 A partial enlarged view of point E in the middle;

[0032] Figure 10 yes Figure 8 A partial enlarged view of point F in the middle;

[0033] Figure 11 yes Figure 8 A partial enlarged view of point G in the middle;

[0034] In the figure, 1. holding table; 2. drying channel; 3. heat-insulating curtain; 4. holding rack; 5. holding channel; 6. positioning block; 7. horizontal partition; 8. vertical partition; 9. holding space; 10. connecting sleeve; 11. L-shaped connecting rod; 12. limiting plate; 13. guide wheel; 14. guide groove; 15. driving frame; 16. rotating shaft; 17. circular hole; 18. first rolling bearing; 19. first gear; 20. first rack; 21. second rack; 22. Fixed protective plate; 23. Rotating protective plate; 24. Rotating rod; 25. Second rolling bearing; 26. Second gear; 27. Third rack; 28. Transmission rod; 29. ​​Rotating motor; 30. First bevel gear; 31. Second bevel gear; 32. First sprocket; 33. First chain; 34. Second sprocket; 35. Second chain; 36. Rotating plate; 37. Fixed plate; 38. Limit spring; 39. L-shaped support rod; 40. Support wheel. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with specific embodiments:

[0036] A NOx-CO synergistic treatment composite catalyst is prepared from ammonium metavanadate, ammonium metatungstate, copper nitrate and titanium dioxide, wherein the titanium dioxide is only used as a carrier, and the mass ratio of the ammonium metavanadate, ammonium metatungstate, copper nitrate and titanium dioxide is 4:3:7:112.

[0037] A method for preparing a NOx-CO collaborative treatment composite catalyst comprises the following steps:

[0038] Step 1: Place ammonium metavanadate, ammonium metatungstate and copper nitrate in a constant temperature water bath at a mass ratio of 4:3:7, add the same mass of deionized water, heat and stir to prepare a VW-Cu active solution;

[0039] Step 2: Add 8 times the mass of titanium dioxide to the above solution, continue stirring, then put it into an ultrasonic device for ultrasonic immersion, filter the solution to obtain a filter cake;

[0040] Step 3: Dry the filter cake in a drying device, and then place it in a muffle furnace for calcination to obtain a NOx-CO synergistic treatment composite low-temperature denitrification catalyst. The mass ratio of V2O5, WO3, and CuO loaded in the NOx-CO synergistic treatment composite low-temperature denitrification catalyst is 1:1:1, and V2O5, WO3, and CuO account for 1.5% to 2.5% of the total mass.

[0041] Furthermore, the heating temperature in step 1 is 60-80° C., and the stirring time is 8-10 minutes.

[0042] Furthermore, in step 2, the stirring time is 8-10 minutes, and the ultrasonic immersion time is 25-30 minutes.

[0043] Furthermore, in step 3, the temperature of the drying device is 105° C., the drying time is 6 hours, the temperature of the muffle furnace is 500° C., and the calcination time is 5 hours.

[0044] Specifically, taking a method for preparing a NOx-CO co-processing composite catalyst as an example, the first preferred step is as follows:

[0045] Step 1: Place ammonium metavanadate, ammonium metatungstate and copper nitrate in a constant temperature water bath at a mass ratio of 4:3:7, add the same mass of deionized water, heat to 60°C and stir for 10 minutes to prepare a VW-Cu active solution;

[0046] Step 2: Add 8 times the weight of titanium dioxide to the above solution, continue stirring for 10 minutes, then put it into an ultrasonic device for ultrasonic immersion for 30 minutes, filter the solution to obtain a filter cake;

[0047] Step 3: Dry the filter cake in a drying oven at 105°C for 6 hours, and then place it in a muffle furnace and calcine it at 500°C for 5 hours to obtain a NOx-CO synergistic treatment composite low-temperature denitrification catalyst. The mass ratio of V2O5, WO3, and CuO loaded in the NOx-CO synergistic treatment composite low-temperature denitrification catalyst is 1:1:1, and V2O5, WO3, and CuO account for 2% of the total mass.

[0048] The second preferred step is as follows:

[0049] Step 1: Place ammonium metavanadate, ammonium metatungstate and copper nitrate in a constant temperature water bath at a mass ratio of 4:3:7, add the same mass of deionized water, heat to 80°C and stir for 8 minutes to prepare a VW-Cu active solution;

[0050] Step 2: Add 8 times the weight of titanium dioxide to the above solution, continue stirring for 8 minutes, then put it into an ultrasonic device for ultrasonic immersion for 25 minutes, filter the solution to obtain a filter cake;

[0051] Step 3: Dry the filter cake in a drying oven at 105°C for 6 hours, and then place it in a muffle furnace and calcine it at 500°C for 5 hours to obtain a NOx-CO synergistic treatment composite low-temperature denitrification catalyst. The mass ratio of V2O5, WO3, and CuO loaded in the NOx-CO synergistic treatment composite low-temperature denitrification catalyst is 1:1:1, and V2O5, WO3, and CuO account for 2.5% of the total mass.

[0052] The following is combined with Figure 2-11 A drying device for a NOx-CO co-processing composite catalyst is described in detail:

[0053] A drying device for a NOx-CO co-processing composite catalyst comprises a holding platform 1, a drying channel 2 is installed on the upper end of the holding platform 1, heat insulation curtains 3 are installed on both sides of the drying channel 2, a feeding mechanism is installed on the holding platform 1, and a drying mechanism is installed on the holding platform 1; the feeding mechanism comprises a plurality of groups of holding racks 4 placed above the holding platform 1, each group of holding racks 4 is composed of a plurality of holding channels 5, positioning blocks 6 are installed on the surfaces of both sides of the holding channels 5, a plurality of transverse partitions 7 and longitudinal partitions 8 are installed in the holding channels 5, the transverse partitions 7 and longitudinal partitions 8 divide the holding channels 5 into a plurality of holding spaces 9, the holding channels 5 are arranged in a plurality of positions, and the holding channels 5 are arranged in a plurality of positions. A plurality of connecting sleeves 10 are installed at the front end of the two side surfaces, and a plurality of L-shaped connecting rods 11 are installed at the rear end of the two side surfaces of the holding channel 5. The L-shaped connecting rod 11 on the front holding channel 5 passes through the inner side of the connecting sleeve 10 on the rear holding channel 5. A limiting plate 12 is installed at the end of the L-shaped connecting rod 11. The holding channel 5 on the front side of each holding rack 4 is not provided with a connecting sleeve 10, and the holding channel 5 on the rear side of each holding rack 4 is not provided with an L-shaped connecting rod 11. A plurality of guide wheels 13 are installed on the lower surface of the holding channel 5, and a plurality of guide grooves 14 are opened on the upper end of the holding platform 1. The lower end of the guide wheel 13 extends into the guide groove 14, and the drying Drive racks 15 are installed at both ends of the channel 2. The drive racks 15 can drive the holding racks 4 in and out of the drying channel 2, and the drive racks 15 can change the spacing between adjacent holding channels 5; the drying mechanism includes multiple rotating shafts 16 in the holding channel 5, and the rotating shafts 16 are located in the space separated by the transverse partitions 7. Each layer of space is provided with two rotating shafts 16, and multiple circular holes 17 are opened on the longitudinal partitions 8. The rotating shafts 16 pass through the longitudinal partitions 8 from the circular holes 17. Multiple first rolling bearings 18 are installed on the surfaces of both sides of the holding channel 5. The rotating shafts 16 extend from the first rolling bearings 18 to the outside of the holding channel 5. A first gear 19 is installed at both ends of the rotating shaft 16 on the inner rear side, and a plurality of first racks 20 are evenly distributed and installed in the drying channel 2. The first rack 20 can mesh with the first gear 19 from below the first gear 19. A second rack 21 installed in the holding channel 5 is provided on one side of the first rack 20. The second rack 21 can mesh with the first gear 19 from above the first gear 19. The first racks 20 and the second racks 21 are staggered and have the same spacing. A fixed protective plate 22 installed on the transverse partition 7 is provided on the front side of the holding space 9, and a rotating protective plate 23 installed on the transverse partition 7 is provided on the rear side of the fixed protective plate 22;

[0054] The process of drying the filter cake of this device is as follows: the staff places the holding rack 4 on the holding table 1 and places the lower end of the guide wheel 13 in the guide groove 14. Under normal circumstances, multiple holding channels 5 are close to each other and positioned by the positioning block 6. The staff pushes the front holding channel 5 to the side of the drying channel 2 and contacts it with the driving rack 15. The driving rack 15 is started. The driving rack 15 can drive the front holding channel 5 to move, and the rear holding channel 5 will not move, thereby widening the distance between the first holding channel 5 and the second holding channel 5. The staff moves the holding channel 5 to the rotating channel 9 in the holding space 9. The filter cake is placed above the driving shaft 16. When the first holding channel 5 moves, the L-shaped connecting rod 11 can be driven to move. When the limit plate 12 at the end of the L-shaped connecting rod 11 moves to the connecting sleeve 10, the second holding channel 5 can be moved, and the third holding channel 5 will not move, which can increase the distance between the second holding channel 5 and the third holding channel 5, thereby facilitating the placement of the filter cake in the second holding channel 5. When one holding channel 5 is separated from the driving frame 15, the second holding channel 5 can be connected to the driving frame 15, and then, under the action of the driving frame 15, the second holding channel 5 can be driven to move. The channel 5 moves, and the first holding channel 5 does not move, which can reduce the distance between the first holding channel 5 and the second holding channel 5. When the positioning blocks 6 on the two holding channels 5 are in contact, the first holding channel 5 can be pushed, and so on. After the previous holding channel 5 leaves the driving frame 15, the next holding channel 5 is connected to the driving frame 15, thereby increasing the distance between the multiple holding channels 5 first and then decreasing, and pushing the holding channel 5 that has been discharged to the inside of the drying channel 2. By heating the inside of the drying channel 2, the filter cake can be dried, and the heat insulation curtain 3 can reduce the heat. When the containing channel 5 moves, the rotating shaft 16 can be driven to move, and the first gears 19 at both ends of the rotating shaft 16 are respectively in contact with the first rack 20 and the second rack 21, thereby driving the rotating shaft 16 to rotate back and forth, so that the filter cake can be moved, and the drying speed of the filter cake can be increased. The fixed protective plate 22 and the rotating protective plate 23 can prevent the filter cake from falling. When the distance between the containing channels 5 increases, the rotating protective plate 23 can be rotated to an inclined state, which can facilitate loading. When the distance between the containing channels 5 decreases, the rotating protective plate 23 can be rotated to a vertical state to prevent the filter cake from falling.

[0055] Refer to the instruction manual Figure 2 , Instruction Manual Figure 3 , Instruction Manual Figure 6 , Instruction Manual Figure 7 , Instruction Manual Figure 8 , Instruction Manual Figure 9 and instructions attached Figure 10The driving frame 15 includes a plurality of rotating rods 24 located on both sides of the drying channel 2. A second rolling bearing 25 is installed at both ends of the rotating rod 24. The second rolling bearing 25 at the upper end is installed at the upper end of the drying channel 2, and the second rolling bearing 25 at the lower end is installed on the holding platform 1. A second gear 26 is installed on the rotating rod 24. A third rack 27 is installed on the surface of both sides of the holding channel 5. The third rack 27 can mesh with the second gear 26. The adjacent rotating rods 24 are connected by a transmission mechanism. A transmission rod 28 is installed on the upper end of the rotating rod 24 located at the starting end of the drying channel 2. The rod 28 passes through the drying channel 2 and extends above the drying channel 2. A rotating motor 29 is installed on one side of the upper end of the drying channel 2. A first bevel gear 30 is installed on the rotating end of the rotating motor 29. A second bevel gear 31 is provided on one side of the first bevel gear 30 and is installed on the upper end of the transmission rod 28. The first bevel gear 30 and the second bevel gear 31 are engaged. A first sprocket 32 ​​is installed on the upper end of the transmission rod 28. The two first sprockets 32 are connected by a first chain 33. The transmission mechanism includes a second sprocket 34 installed on the upper end of the rotating rod 24. Adjacent second sprockets 34 are connected by a second chain 35.

[0056] The process of the driving frame 15 driving the holding rack 4 to move is as follows: under normal circumstances, the outermost second gear 26 engages with the third rack 27 on the first holding channel 5, starting the rotating motor 29 to rotate, and the rotating motor 29 can drive the first bevel gear 30 to rotate. The first bevel gear 30 and the second bevel gear 31 engage, which can drive the second bevel gear 31 and a transmission rod 28 to rotate, and make the first sprocket 32 ​​on this transmission rod 28 rotate. The first sprockets 32 on the two transmission rods 28 are connected by a first chain 33, so that the two first sprockets 32 and the transmission rod 28 rotate synchronously, and the transmission rod 28 can drive the rotating rod 24 below it to rotate, and the rotating rod 24 can drive the second sprocket 34 to rotate. The adjacent second sprockets 34 are connected by a second chain 35, so that all the rotating rods 24 can rotate. When the rotating rod 24 rotates, it can drive the second gear 26 to rotate, and the second gear 26 and the third rack 27 engage, which can drive the third rack 27 and the holding channel 5 to move.

[0057] Refer to the instruction manual Figure 2 , Instruction Manual Figure 4 , Instruction Manual Figure 5 , Instruction Manual Figure 6 , Instruction Manual Figure 7 , Instruction Manual Figure 8 and instructions attached Figure 11The rotating guard plate 23 includes a rotating plate 36 connected to the transverse partition 7 by a hinge. A plurality of fixed plates 37 mounted on the transverse partition 7 are provided on the inner side of the rotating plate 36. A limit spring 38 is installed on the surface of the fixed plate 37 close to the rotating plate 36. An L-shaped support rod 39 is provided on the outer side of the rotating plate 36 and is mounted on the transverse partition 7. The rotating plate 36 tilts on the L-shaped support rod 39. Support wheels 40 are installed at both ends of the front surface of the fixed guard plate 22. When the two containing channels 5 are close to each other, the support wheels 40 can push the rotating plate 36 to a vertical position.

[0058] The process of rotating the rotating protective plate 23 is as follows: when the two holding channels 5 are in the closest position, the supporting wheel 40 can push the rotating plate 36 to a vertical state and compress the limit spring 38. When the distance between the two holding channels 5 increases, the rotating plate 36 can be pushed toward the rear under the elastic force of the limit spring 38, and the rotating plate 36 can be rotated around the hinge. Then, under the action of gravity, the rotating plate 36 can be rotated downward and supported by the L-shaped support rod 39, which is convenient for loading. When the distance between the two holding channels 5 is reduced, the rotating plate 36 can be pushed to a vertical state by the supporting wheel 40, and the limit spring 38 can be compressed.

[0059] The above are only preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. As long as the technical effects of the present invention are achieved by any same or similar means, they should fall within the scope of protection of the present invention.

[0060] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the present invention. Any changes that may be made to certain parts thereof by those skilled in the art all reflect the principles of the present invention and fall within the scope of protection of the present invention.

Claims

1. A drying device for a NOx-CO co-processing composite catalyst, comprising a holding platform (1), a drying channel (2) installed at the upper end of the holding platform (1), and heat insulation curtains (3) installed on both sides of the drying channel (2), wherein the catalyst is made of ammonium metavanadate, ammonium metatungstate, copper nitrate and titanium dioxide, and is characterized in that: A feeding mechanism is installed on the holding platform (1), and a drying mechanism is installed on the holding platform (1); The feeding mechanism comprises a plurality of groups of holding racks (4) placed above the holding platform (1), each group of holding racks (4) is composed of a plurality of holding channels (5), positioning blocks (6) are installed on both side surfaces of the holding channels (5), a plurality of transverse partitions (7) and longitudinal partitions (8) are installed in the holding channels (5), the transverse partitions (7) and longitudinal partitions (8) divide the holding channels (5) into a plurality of holding spaces (9), a plurality of connecting sleeves (10) are installed at the front ends of both side surfaces of the holding channels (5), a plurality of L-shaped connecting rods (11) are installed at the rear ends of both side surfaces of the holding channels (5), and the L-shaped connecting rods (11) on the front side holding channels (5) are connected to the connecting sleeves ( 10) is passed through the inner side, a limiting plate (12) is installed at the end of the L-shaped connecting rod (11), the holding channel (5) at the front side of each holding rack (4) is not provided with a connecting sleeve (10), and the holding channel (5) at the rear side of each holding rack (4) is not provided with an L-shaped connecting rod (11), a plurality of guide wheels (13) are installed on the lower surface of the holding channel (5), a plurality of guide grooves (14) are opened at the upper end of the holding table (1), and the lower ends of the guide wheels (13) extend into the guide grooves (14), and driving racks (15) are installed at both ends of the drying channel (2), and the driving racks (15) can drive the holding racks (4) in and out of the drying channel (2), and the driving racks (15) can change the spacing between adjacent holding channels (5); The drying mechanism includes a plurality of rotating shafts (16) in the holding channel (5), the rotating shafts (16) are located in the space separated by the transverse partition (7), and each layer of space is provided with two rotating shafts (16). A plurality of circular holes (17) are opened on the longitudinal partition (8), and the rotating shafts (16) pass through the longitudinal partition (8) from the circular holes (17). A plurality of first rolling bearings (18) are installed on the surfaces of both sides of the holding channel (5), and the rotating shafts (16) extend from the first rolling bearings (18) to the outside of the holding channel (5). First gears (19) are installed at both ends of the rotating shafts (16) on the rear side of the holding channel (5). A plurality of first racks (20) are evenly distributed and installed. The first racks (20) can mesh with the first gear (19) from below the first gear (19). A second rack (21) installed in the holding channel (5) is provided on one side of the first rack (20). The second rack (21) can mesh with the first gear (19) from above the first gear (19). The first racks (20) and the second racks (21) are staggered and have the same spacing. A fixed protective plate (22) installed on the transverse partition (7) is provided on the front side of the holding space (9), and a rotating protective plate (23) installed on the transverse partition (7) is provided on the rear side of the fixed protective plate (22).

2. The drying device for the NOx-CO collaborative treatment composite catalyst according to claim 1, characterized in that: The driving frame (15) includes a plurality of rotating rods (24) located on both sides of the drying channel (2), and second rolling bearings (25) are installed at both ends of the rotating rods (24). The second rolling bearing (25) at the upper end is installed at the upper end of the drying channel (2), and the second rolling bearing (25) at the lower end is installed on the holding platform (1). A second gear (26) is installed on the rotating rod (24), and third racks (27) are installed on the surfaces of both sides of the holding channel (5). The third rack (27) can be engaged with the second gear (26). Adjacent rotating rods (24) are connected by a transmission mechanism. A transmission rod (28) is installed on the upper end of the rotating rod (24) located at the starting end of the drying channel (2). The rod (28) passes through the drying channel (2) and extends above the drying channel (2). A rotating motor (29) is installed on one side of the upper end of the drying channel (2). A first bevel gear (30) is installed on the rotating end of the rotating motor (29). A second bevel gear (31) installed on the upper end of the transmission rod (28) is provided on one side of the first bevel gear (30). The first bevel gear (30) and the second bevel gear (31) are engaged. A first sprocket (32) is installed on the upper end of the transmission rod (28). The two first sprockets (32) are connected by a first chain (33). The transmission mechanism includes a second sprocket (34) installed on the upper end of the rotating rod (24). Adjacent second sprockets (34) are connected by a second chain (35).

3. The drying device for the NOx-CO collaborative treatment composite catalyst according to claim 1, characterized in that: The rotating protective plate (23) includes a rotating plate (36) connected to the transverse partition (7) by a hinge, a plurality of fixed plates (37) mounted on the transverse partition (7) are provided on the inner side of the rotating plate (36), a limiting spring (38) is installed on the surface of the fixed plate (37) close to the rotating plate (36), an L-shaped support rod (39) mounted on the transverse partition (7) is provided on the outer side of the rotating plate (36), and the rotating plate (36) is tilted on the L-shaped support rod (39). Support wheels (40) are installed at both ends of the front side surface of the fixed protective plate (22). When the two containing channels (5) are close to each other, the support wheels (40) can push the rotating plate (36) to a vertical position.

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