High-efficiency wide-temperature plate type denitration catalyst as well as preparation device and application thereof

Abstract

The invention discloses an efficient wide-temperature plate type denitration catalyst and a preparation device and application thereof, and particularly relates to a plate type denitration catalyst which comprises a square carrier composed of a single plate with a hollow layer, and carrier layers are attached to the surfaces of the hollow layer and the single plate. When flue gas passes along the single plates, one part of the flue gas flows along the wave parts, when the flue gas passes through the vertical surfaces on the two sides of the wave parts, the flue gas passes through the through holes and reaches the hollow layer due to the inertia of the flowing direction of air flow, and the other part of the flue gas enters along the hollow layer and is discharged from the through holes and enters the space between the two single plates along with the flowing inertia of the wave parts; when the flowing speed of the flue gas is higher, the more the flue gas exhausted from the through holes and the more the flue gas entering the through holes are, and the flue gas crossly impacts and slows down, so that the flue gas is slowed down, the contact between the flue gas and the hollow layer as well as the carrier layer on the surface of the veneer is increased, the repeated reaction is performed, and the capability of reducing the flue gas is increased along with the increase of the flue gas.

Description

Technical Field

[0001] The present invention relates to the technical field of denitration catalysts, and more specifically to a high-efficiency wide-temperature plate-type denitration catalyst, a preparation device and an application thereof. Background Art

[0002] The plate-type denitration catalyst is made by combining single plates formed by using a metal frame as a base material and coating catalytic carriers such as tungsten and titanium on the surface of the base material.

[0003] According to the patent number CN106732709A, publication (announcement) date: May 31, 2017, a preparation process of a corrugated plate-type denitration catalyst is disclosed.

[0004] According to the patent number CN107224979A, publication (announcement) date: October 3, 2017, a plate-type denitration catalyst and a preparation method thereof are disclosed.

[0005] In the prior art including the above patents, in places where plate-type denitration catalysts are highly applicable, such as in high-smoke places like coal-fired power plants and steel plants, when there is a sudden high flow rate due to production, when the flue gas quickly passes through the interlayer of the single plate, the contact time with the coating carrier is insufficient, resulting in some flue gas having no time to react with the carrier. Summary of the Invention

[0006] The purpose of the present invention is to provide a high-efficiency wide-temperature plate-type denitration catalyst, a preparation device and an application thereof, aiming to solve the problem of insufficient residence time of flue gas in special occasions with high flow rate and high flue gas.

[0007] To achieve the above purpose, the present invention provides the following technical solution: A high-efficiency wide-temperature plate-type denitration catalyst includes a square carrier composed of single plates with a hollow layer, and a carrier layer is attached to both the hollow layer and the surface of the single plate; The carrier layer is composed of a mixture of TiO2, V2O5, WO3, silica sol and hydroxypropyl methylcellulose; On the single plate, there are wave parts, vertical surfaces are arranged on both sides of the wave parts, and through holes are opened on the vertical surfaces.

[0008] Preferably, the addition amounts of the components of the carrier layer are in mass percentages, and TiO2, V2O5, WO3, silica sol and hydroxypropyl methylcellulose are 15% - 22%, 0.5% - 1%, 5% - 8%, 40% - 50% and 5% - 20% respectively.

[0009] Preferably, the square carrier further includes a snap-on armor, and the snap-on armor further includes symmetrically arranged side plates and limiting stickers, and the two side plates are fixed to a plurality of the single plates and the limiting stickers by fasteners.

[0010] An efficient wide-temperature plate-type denitration catalyst preparation device, applying the above-mentioned efficient wide-temperature plate-type denitration catalyst, respectively includes: A coating rack arranged vertically, on which two fixed sliders for fixing the single plate are slidably connected; A pressing assembly, which includes two groups of pressing rollers symmetrically and staggeredly arranged along the coating rack, and the two groups of pressing rollers move towards the single plate to form a wavy part on the single plate.

[0011] Preferably, it further includes a liquid mixing tank, and the two fixed sliders are communicated with the liquid mixing tank. One of the fixed sliders bends out liquid along with the single plate, and the other fixed slider sinks into the liquid mixing tank to receive liquid along with the separation of the single plate.

[0012] Preferably, a connecting liquid tank is slidably connected to the pressing roller, and the two approach each other as the pressing roller presses the single plate, so as to drive the pressing roller to discharge liquid to the single plate.

[0013] Preferably, it further includes a liquid covering circulation assembly, which includes liquid bags respectively communicated with the two fixed sliders. A connecting plate connected to the liquid bag is arranged on the fixed slider, and the connecting plate squeezes or pulls the liquid bag to discharge and pump liquid.

[0014] Preferably, an air bag is arranged on the liquid bag, and the air bag moves along with the pressing roller to push against the liquid bag.

[0015] Preferably, the solution in the liquid mixing tank flows along the following two paths: The first path: The solution enters the liquid bag along one of the fixed sliders and flows out along the other fixed slider; The second path: The solution enters through the connecting liquid tank on the pressing roller and sprays out along the pressing roller.

[0016] An application of an efficient wide-temperature plate-type denitration catalyst, which is applied to the efficient wide-temperature plate-type denitration catalyst described in claim 1. It is characterized in that the square carrier is applied to the gas outlet of a coal-fired power plant and the gas outlet of an iron and steel plant.

[0017] In the above technical solution, an efficient wide-temperature plate-type denitration catalyst, a preparation device and an application provided by the present invention have the following beneficial effects: When the flue gas passes along a single plate, a part of the flue gas will flow along the wavy part. When passing through the vertical surfaces on both sides of the wavy part, due to the inertia of the gas flow direction, it will pass through the perforations and reach the hollow layer. Another part of the flue gas will enter along the hollow layer and, following the inertia of the flow of the wavy part, be discharged from the perforations and enter between two single plates. When the flue gas flows faster, more flue gas is discharged from the perforations and enters the perforations. The flue gas collides and decelerates crosswise, thereby slowing down the flue gas and increasing the contact between the flue gas and the hollow layer as well as the carrier layer on the surface of the single plate, carrying out repeated reactions. As the flue gas increases, the ability to decelerate the flue gas will increase accordingly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Schematic diagram of the plate-type denitration catalyst provided by the embodiment of the present invention; Figure 2 Schematic diagram of a single plate provided by the embodiment of the present invention; Figure 3 Schematic cross-sectional view of the plate-type denitration catalyst provided by the embodiment of the present invention; Figure 4 Explosion schematic diagram of the plate-type denitration catalyst provided by the embodiment of the present invention; Figure 5 Overall schematic diagram of the preparation device of the plate-type denitration catalyst provided by the embodiment of the present invention; Figure 6 Overall explosion schematic diagram of the preparation device of the plate-type denitration catalyst provided by the embodiment of the present invention; Figure 7 Explosion schematic diagram of the coating rack and the fixed sliding rack provided by the embodiment of the present invention; Figure 8 Explosion schematic diagram of the liquid coating circulation component provided by the embodiment of the present invention; Figure 9 Schematic diagram of the liquid coating circulation component provided by the embodiment of the present invention; Figure 10 Overall cross-sectional view of the preparation device of the plate-type denitration catalyst provided by the embodiment of the present invention.

[0020] Description of the reference numerals: 1. Single board; 11. Hollow layer; 12. Wave part; 121. Perforation; 2. Snap armor; 21. Side plate; 22. Restricting patch plate; 23. Fixing bolt; 31. Pressing assembly; 310. Pressing roller; 3101. Liquid outlet groove; 3102. Slide frame; 311. Connecting liquid chamber; 3111. Liquid suction pipe; 3112. Driving end; 3113. Extrusion block; 32. Coating rack; 4. Mixing liquid chamber; 41. Support frame; 51. Fixed sliding frame; 511. Elastic member; 52. Connecting plate; 53. Output pipe; 54. Input pipe; 6. Liquid covering circulation assembly; 61. Liquid sac; 611. Bottom outlet head; 612. Top receiving head; 62. Air bag. Detailed implementation manners

[0021] In order to make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Apparently, the described embodiments are some but not all of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0022] Embodiment 1 As Figure 1-4 shown, a highly efficient wide-temperature plate-type denitration catalyst includes a square carrier composed of single boards 1 with a hollow layer 11, and a carrier layer is attached to both the hollow layer 11 and the surface of the single board 1. The carrier layer is composed of a mixture of TiO2, V2O5, WO3, silica sol and hydroxypropyl methylcellulose. On the single board 1, there is a wave part 12, vertical surfaces are arranged on both sides of the wave part 12, and perforations 121 are formed on the vertical surfaces.

[0023] Specifically, the hollow layer 11 on the single board 1 is made by bending and welding, while the wave part 12 is integrally formed by pressing on the single board 1 with the hollow layer 11, and the perforations 121 are formed by drilling through with a drill bit. The square carrier is formed by stacking multiple single boards 1, so as to react with the flue gas through the carrier layer on the surface of the wave part 12, thereby achieving the denitration effect.

[0024] The carrier layer is a liquid composed of a mixture of TiO2, V2O5, WO3, silica sol and hydroxypropyl methylcellulose, thickened by hydroxypropyl methylcellulose, and the thickened solution is hung on the single board 1 and then heated to form the carrier layer.

[0025] In the above technical solution, when the flue gas passes along the single board 1, a part of the flue gas will flow along the wave part 12. When passing through the vertical surfaces on both sides of the wave part 12, due to the inertia of the air flow direction, it will pass through the perforations 121 and reach the hollow layer 11. Another part of the flue gas will enter along the hollow layer 11 and, following the inertia of the flow of the wave part 12, will be discharged from the perforations 121 and enter between the two single boards 1. When the flue gas flows faster, more flue gas is discharged from the perforations 121 and more flue gas enters the perforations 121. The degree of impact deceleration of the flue gas crossing each other is higher, so as to adaptively slow down the flue gas and increase the contact between the flue gas and the hollow layer 11 and the carrier layer on the surface of the single board 1, and conduct repeated reactions. As the flue gas increases, the ability to decelerate the flue gas will increase accordingly.

[0026] As an embodiment provided by the present invention, the addition amounts of the components of the carrier layer are in mass percentages. TiO2, V2O5, WO3, silica sol, and hydroxypropyl methylcellulose are 15% - 22%, 0.5% - 1%, 5% - 8%, 40% - 50%, and 5% - 20% respectively.

[0027] Specifically, the addition amounts of the components are in mass percentages. In the solution, TiO2, V2O5, WO3, silica sol, and hydroxypropyl methylcellulose are 15%, 0.8%, 8%, 50%, and 10% respectively, and the rest is a solution mixed with water. The solution needs to be continuously stirred during use to suspend the insoluble particles in the solution.

[0028] As an embodiment provided by the present invention, the square carrier further includes a buckle armor 2. The buckle armor 2 further includes symmetrically arranged side plates 21 and limiting patch plates 22. The two side plates 21 are fixed to a plurality of single boards 1 and the limiting patch plates 22 by fasteners.

[0029] Specifically, the side plates 21 are provided with protrusions for restricting the single board 1, which is convenient for workers to assemble the single board 1. The limiting patch plates 22 are provided with a fitting portion 231 for fitting the single board 1 at the outermost edge (taking Figure 4 as a reference, the outermost edge is the single board 1 at the uppermost or lowermost end) to ensure that when the flue gas enters the single board l at the outermost edge, it will only enter the hollow layer 11 and be discharged into the two single boards 1 from the perforations 121 when passing through the wave part 12 along with the hollow layer 11. The two side plates 21 fix the single board 1 and the limiting patch plates 22 through fixing bolts 23.

[0030] Embodiment 2 As Figures 5-10 shown, a preparation device for an efficient wide-temperature plate-type denitration catalyst includes: A coating rack 32 arranged vertically, on which two fixed sliding frames 51 for fixing the single board 1 are slidably connected; The pressing assembly 31 includes two sets of pressing rollers 310 symmetrically and staggeredly arranged along the coating rack 32. The two sets of pressing rollers 310 move towards the veneer 1 to form a wavy portion 12 on the veneer 1.

[0031] Specifically, two fixed carriages 51 are symmetrically arranged and slidably connected to the coating rack 32. An elastic member 511 (the elastic member 511 can be a spring) is arranged between the coating rack 32 and the fixed carriage 51. The elastic member 511 restricts the fixed carriage 51 from stretching towards both ends of the coating rack 32. A buckle member for clamping the hollow layers 11 at both ends of the veneer 1 is arranged on the fixed carriage 51 (the buckle member can be an elastic metal sheet arranged on the fixed carriage 51, which is fixed after being inserted into the hollow layer 11). The two sets of pressing rollers 310 are staggeredly arranged. The pressing rollers 310 are arranged at the output end of the hydraulic cylinder, and the two sets of pressing rollers 310 are driven by the hydraulic cylinder to move towards the veneer 1 simultaneously for extrusion, so as to form a wavy portion 12 on the veneer 1.

[0032] In the above technical solution, after the veneer 1 is restricted by the coating rack 32 and the fixed carriage 51, the synchronous pressing is performed by the pressing rollers 310. The elastic member 511 is used to pull and support the veneer 1, restricting the veneer 1 to be in the middle position between the two pressing rollers 310, and avoiding the situation that the hollow layer 11 of the veneer 1 with the hollow layer 11 is offset and over-extruded to be closed. Compared with directly placing the veneer 1 between the two pressing rollers 310 for pressing, it is less likely to produce defective products and increases the yield rate.

[0033] As an embodiment provided by the present invention, it further includes a liquid mixing tank 4. The two fixed carriages 51 are communicated with the liquid mixing tank 4. One of the fixed carriages 51 discharges liquid as the veneer 1 bends, and the other fixed carriage 51 receives liquid as the veneer 1 is detached and sinks into the liquid mixing tank 4.

[0034] Specifically, the liquid mixing tank 4 is used to carry a solution mixed with TiO2, V2O5, WO3, silica sol and hydroxypropyl methylcellulose. A support frame 41 is arranged on the liquid mixing tank 4, and the support frame 41 is used to fix the coating rack 32. Liquid infusion channels are opened on both of the two fixed carriages 51, and the liquid mixing tank 4 is communicated with the liquid infusion channels. When the veneer 1 is bent to form a wavy portion 12 under the pressing of the pressing rollers 310, the two fixed carriages 51 will approach each other. At this time, one of the fixed carriages 51 ( Figure 7 for reference, one of the fixed carriages 51 is at the top position) will discharge liquid to transport the solution in the liquid mixing tank 4 to the hollow layer 11 of the metal, so as to perform the plating operation. Then, the excess solution will overflow from the perforations 121 and return to the liquid mixing tank 4. Subsequently, when the veneer 1 is disassembled, the other fixed carriage 51 ( Figure 7For reference, another fixed carriage 51 (in the bottom position) is pulled by the elastic member 511 as the veneer 1 is separated, so as to retract the liquid mixing chamber 4. At this time, the fixed carriage 51 sucks the solution in the liquid mixing chamber 4, waiting for the fixed carriage 51 in the top position to discharge the liquid next time, so as to coat the hollow layer 11.

[0035] The coating rack 32 is arranged in the vertical direction, facilitating the solution to flow out along the through holes 121.

[0036] As an embodiment provided by the present invention, a connecting liquid chamber 311 is slidably connected to the pressing roller 310. The two approach each other as the pressing roller 310 presses the veneer 1, so as to drive the pressing roller 310 to discharge liquid to the veneer 1.

[0037] Specifically, a liquid discharge groove 3101 is formed on the pressing roller 310. Symmetrical rubber strips are arranged on the liquid discharge groove 3101 to restrict the outflow of the solution in the pressing roller 310. A sliding frame 3102 is arranged on the pressing roller 310. The sliding frame 3102 is slidably connected to the connecting liquid chamber 311. A spring is arranged between the two along the diagonal line. A liquid suction pipe 3111 is fixedly communicated with the connecting liquid chamber 311. A one-way valve is arranged in the liquid suction pipe 3111, so that the liquid suction pipe 3111 can only convey liquid to the connecting liquid chamber 311. The liquid suction pipe 3111 is always immersed in the liquid mixing chamber 4. Before the pressing roller 310 contacts the pressure of the veneer 1, the spring will bend first, so that the pressing roller 310 and the connecting liquid chamber 311 are mutually extruded, so that the solution in the connecting liquid chamber 311 diffuses and sprays out along the liquid discharge groove 3101 to spray the outer side of the veneer 1. Subsequently, during the process of the pressing roller 310 pressing the veneer 1, an included angle exists between the formed wave portion 12 and the pressing roller 310, and the solution flowing out from the through holes 121 will stay in the included angle. When the pressing roller 310 separates from the veneer 1, the retained solution compensates the part of the pressing roller 310 in contact with the veneer 1, ensuring that the solution remains on the outer surface of the veneer 1. When the pressing roller 310 separates from the veneer 1, the spring rebounds, driving the sliding frame 3102 and the connecting liquid chamber 311 to move away, and sucking the solution in the liquid mixing chamber 4.

[0038] As an embodiment provided by the present invention, it further includes a liquid coating circulation assembly 6, which includes liquid sacs 61 respectively communicated with the two fixed carriages 51. A connecting plate 52 connected to the liquid sacs 61 is arranged on the fixed carriage 51. The connecting plate 52 squeezes or pulls the liquid sacs 61 to discharge and suck the liquid.

[0039] Specifically, the liquid sac 61 is fixedly connected to one side of the coating rack 32. The top and bottom of the liquid sac 61 are respectively provided with a top receiving head 612 and a bottom outlet head 611. The top receiving head 612 is communicated with the fixed sliding rack 51 at the bottom through an input pipe 54. Restricted by the one-way valve in the top receiving head 612, the solution is suctioned through the deformation of the liquid sac 61. The bottom outlet head 611 is communicated with the fixed sliding rack 51 at the top through an output pipe 53. Restricted by the one-way valve in the bottom outlet head 611, the solution is output through the deformation of the liquid sac 61. The solution in the liquid sac 61 is agitated with the deformation of the liquid sac 61, keeping the solution particles in the liquid sac 61 in a suspended state.

[0040] The liquid sac 61 is arranged to be connected to the connecting plate 52 fixed on the fixed sliding rack 51, and moves with the deformation of the single board 1 to achieve liquid discharge, and returns with the pulling of the elastic member 511 to achieve liquid suction.

[0041] As an embodiment provided by the present invention, an air sac 62 is arranged on the liquid sac 61, and the air sac 62 moves with the pressing roller 310 to push against the liquid sac 61.

[0042] Specifically, a recessed portion is formed on the liquid sac 61, the air sac 62 is filled in the recessed portion, a driving end 3112 is arranged on the connecting liquid bin 311, and an extrusion block 3113 for extruding the air sac 62 is arranged on the driving end 3112. When the driving end 3112 drives the pressing roller 310 to approach the single board 1, the air sac 62 will be extruded and deformed, so that the liquid sac 61 is extruded, driving the fixed sliding rack 51 to perform the first liquid discharge, and then performing the second liquid discharge with the deformation of the single board 1. The two liquid discharges increase the thickness of the carrier layer in the hollow layer 11 to cope with the rapidly flowing flue gas in the hollow layer 11, and increase the wear resistance and service life.

[0043] As the optimal embodiment provided by the present invention, the solution in the mixing liquid bin 4 flows along the following two paths: The first path: The solution enters the liquid sac 61 along one of the fixed sliding racks 51 and flows out along the other fixed sliding rack 51. The second path: The solution enters along the connecting liquid bin 311 on the pressing roller 310 and sprays out along the pressing roller 310.

[0044] Specifically, the solution in the mixing liquid tank 4 will flow and circulate along two paths. The first path: the solution enters the liquid sac 61 along one of the fixed carriages 51 and flows out along the other fixed carriage 51 to coat the hollow layer 11. The second path: the solution enters along the connecting liquid tank 311 on the pressing roller 310 and sprays out along the pressing roller 310. The two paths increase the agitation of the solution in the mixing liquid tank 4, keeping the particles in the solution from sinking and in a suspended state. And in the first path, a small amount of the solution is first sprayed out and flows simultaneously with the solution in the second path. Subsequently, the second path stops and the first path continues to spray out a large amount of the solution, which is a semi-alternating spraying method, increasing the agitation duration of the solution in the mixing liquid tank 4 and further reducing the sinking of the particles in the solution.

[0045] First, the single board 1 is restricted by two fixed carriages 51 to keep it in a vertical state. Subsequently, two groups of pressing rollers 310 are driven by a hydraulic cylinder to move towards the single board 1 simultaneously. At this time, the driving end 3112 will squeeze the airbag 62 to deform, so that the liquid sac 61 is squeezed, driving the fixed carriage 51 to perform the first liquid discharge, that is, a small amount of liquid spraying in the first path, to coat the middle hole layer 11. Subsequently, as the pressing roller 310 and the connecting liquid tank 311 continue to move and squeeze each other, the solution in the connecting liquid tank 311 diffuses and sprays out along the liquid discharge groove 3101 to spray the outside of the single board 1, realizing the liquid spraying in the second path. And as it continues to move, the pressing roller 310 presses the single board 1 to form the wavy part 12, causing the two connecting plates 52 to approach and squeeze the liquid sac 61, driving one of the fixed carriages 51 to discharge liquid for the secondary liquid spraying in the first path. Then, the pressing roller 310 is driven to reset, and the spring rebounds, driving the sliding frame 3102 and the connecting liquid tank 311 to move away, sucking the solution in the mixing liquid tank 4. The remaining solution compensates for the part of the pressing roller 310 in contact with the single board 1 to complete the coating of the single board 1. Subsequently, the single board 1 is disassembled for the air-drying step. At this time, as the single board 1 is detached, it is pulled by the elastic member 511 to retract into the mixing liquid tank 4. At this time, the fixed carriage 51 sucks the solution in the mixing liquid tank 4, waiting for the fixed carriage 51 at the top position to discharge liquid next time.

[0046] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An efficient wide-temperature plate-type denitration catalyst, characterized in that, A square carrier composed of a single board (1) with a hollow layer (11), and carrier layers are attached to both the surface of the hollow layer (11) and the single board (1); The carrier layer is composed of a mixture of TiO2, V2O5, WO3, silica sol, and hydroxypropyl methylcellulose; On the single board (1), there are wave portions (12) provided, vertical surfaces are arranged on both sides of the wave portions (12), and through holes (121) are formed on the vertical surfaces.

2. The high-efficiency wide-temperature plate-type denitration catalyst according to claim 1, wherein The addition amounts of the components of the carrier layer are in mass percentages, and TiO2, V2O5, WO3, silica sol, and hydroxypropyl methylcellulose are 15% - 22%, 0.5% - 1%, 5% - 8%, 40% - 50%, and 5% - 20% respectively.

3. An efficient wide-temperature plate-type denitration catalyst according to claim 1, characterized in that, The square carrier further includes a snap-on armor (2), and the snap-on armor (2) further includes symmetrically arranged side plates (21) and limiting patch plates (22), and the two side plates (21) are fixed to a plurality of the single boards (1) and the limiting patch plates (22) by fasteners.

4. An apparatus for preparing an efficient wide-temperature plate-type denitration catalyst, which is applied to the efficient wide-temperature plate-type denitration catalyst described in any one of claims 1 to 3, and is characterized in that, Respectively include: A coating rack (32) arranged vertically, and two fixed sliding racks (51) for fixing the single board (1) are slidably connected thereto; A pressing assembly (31), which includes two groups of pressing rollers (310) symmetrically and staggeredly arranged along the coating rack (32), and the two groups of pressing rollers (310) move towards the single board (1) to form wave portions (12) on the single board (1).

5. An efficient wide-temperature plate-type denitration catalyst preparation device according to claim 4, characterized in that, It further includes a mixing liquid tank (4), and the two fixed sliding racks (51) are communicated with the mixing liquid tank (4). One of the fixed sliding racks (51) discharges liquid as the single board (1) bends, and the other fixed sliding rack (51) receives liquid as the single board (1) disengages and sinks into the mixing liquid tank (4).

6. An efficient wide-temperature plate-type denitration catalyst preparation device according to claim 4, characterized in that, A connecting liquid tank (311) is slidably connected to the pressing roller (310), and the two approach each other as the pressing roller (310) presses the single board (1), so as to drive the pressing roller (310) to discharge liquid to the single board (1).

7. An efficient wide-temperature plate-type denitration catalyst preparation device according to claim 5, characterized in that It further includes a liquid covering circulation assembly (6), which includes liquid bags (61) respectively communicated with the two fixed sliding racks (51). Connecting plates (52) connected to the liquid bags (61) are arranged on the fixed sliding racks (51), and the connecting plates (52) squeeze or pull the liquid bags (61) to discharge and pump liquid.

8. An efficient wide-temperature plate-type denitration catalyst preparation device according to claim 7, characterized in that, An air bag (62) is arranged on the liquid bag (61), and the air bag (62) moves along with the pressing roller (310) to push against the liquid bag (61).

9. An efficient wide-temperature plate-type denitration catalyst preparation device according to claim 7, characterized in that, The solution in the mixing liquid tank (4) flows along the following two paths: The first path: The solution enters the liquid bag (61) along one of the fixed sliding racks (51) and flows out along the other fixed sliding rack (51); The second path: The solution enters along the connecting liquid tank (311) on the pressing roller (310) and sprays out along the pressing roller (310).

10. Application of an efficient wide-temperature plate-type denitration catalyst, which is applied to the efficient wide-temperature plate-type denitration catalyst described in any one of claims 1 to 3, and is characterized in that, The square carrier is applied to the air outlets of coal-fired power plants and steel plants.

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