A high-porous honeycomb catalyst mesh belt kiln

Abstract

The present application discloses a high-porous honeycomb catalyst mesh belt kiln, belonging to the field of mesh belt kilns, comprising a mesh belt, wherein the mesh belt support is located on an integral push plate, the two ends of the support roller body are rotatably connected to the cylinder side frame plate, the bottom ends of the cylinder side frame plate are connected to the cylinder support block via frame plate legs, and the cylinder support block is sequentially provided with a preheating section, a heating section, a transition section, and a cooling section along the length direction. A head end cover body for sealing the head end is provided at the head end of the preheating section, and a tail end cover body for sealing the tail end of the cooling section; the preheating section has a gas inlet valve connected to the interior thereof, the gas inlet valve is connected to an external inert gas supply pipeline; the tail end of the cooling section is connected to a gas outlet valve, the gas outlet valve is connected to an inert gas recovery pipeline. By improving the mesh belt structure and heating and cooling structures, the present invention achieves an improvement in roasting effect compared to traditional mesh belt kilns, thereby improving roasting efficiency and roasting effect.

Description

Technical Field

[0001] The present application belongs to the field of mesh belt kilns, and more specifically, relates to a high-porous honeycomb catalyst mesh belt kiln. Background Art

[0002] Nitrogen oxides are one of the important factors affecting the environment. They can cause acid rain, ozone layer depletion, light pollution and other problems. In the industrial production process, nitrogen oxides produced by industrial boilers, coal-fired power plants, etc. can achieve a higher denitrification efficiency through ammonia selective catalytic reduction technology (NH3-SNCR). In the above-mentioned denitrification process, the catalyst required is mostly a honeycomb structure, and is attached to the honeycomb carrier through different adhesives, coating slurries, and powder catalysts. After the carrier is dried, it is sent to the roasting furnace for roasting to obtain a honeycomb denitrification catalyst. In order to achieve a better roasting effect, a mesh belt kiln is often used. However, due to the limitations of the heating device and the limitations of the structure, the traditional mesh belt kiln often has unsatisfactory roasting effects on the honeycomb catalyst and cannot further improve the roasting effect. Summary of the Invention

[0003] The purpose of this application is to provide a high-porous honeycomb catalyst mesh belt kiln, which improves the roasting effect compared with the traditional mesh belt kiln by improving the mesh belt structure and heating and cooling structure, and improves the roasting efficiency and roasting effect.

[0004] To achieve the above objectives, this application is implemented through the following technical solutions:

[0005] A high-porous honeycomb catalyst mesh belt kiln described in the present application includes a mesh belt, which moves around a transmission path formed by mesh belt support rollers under the support of mesh belt support rollers distributed on the mesh belt bracket, one end or both ends of the mesh belt support roller are connected to a mesh belt driving wheel, and the mesh belt driving wheel is driven by a transmission belt, and the mesh belt bracket has an integral pushing plate fixedly connected thereto, the integral pushing plate is slidably connected to the support roller body, and the two ends of the support roller body are rotatably connected to the cylinder side frame plate, and the bottom end of the cylinder side frame plate is connected to the cylinder support block through the frame plate support legs. The cylinder support block is sequentially provided with a preheating section, a heating section, a transition section and a cooling section in the length direction thereof. The preheating section, the heating section, the transition section and the cooling section are all hollow cylinder structures, and a head end cover for sealing the head end is provided at the head end of the preheating section, and a tail end cover for sealing is provided at the tail end of the cooling section; the preheating section has a gas inlet valve connected to its interior, and the gas inlet valve is connected to an external inert gas supply pipeline; the tail end of the cooling section is connected to a gas outlet valve, and the gas outlet valve is connected to an inert gas recovery pipeline.

[0006] As one of the preferred technical solutions, the cooling section and preheating section described in this application are fixedly connected to the outside of a support member, the bottom end of the support member is fixedly connected to a support leg, and the support leg is placed on a horizontal base; the top end of the support member is connected to a driving cylinder in the same direction as the central axis of the cylinder constituting the preheating section, heating section, transition section, and cooling section, the telescopic end of the driving cylinder is connected to one end of a push rod connecting plate, the other end of the push rod connecting plate is connected to the push rod, and the push rod extends into the cooling section through the shaft sleeve of the tail end cover and is connected to the end of the integral push plate.

[0007] As one of the preferred technical solutions, the cylinder side frame plate described in this application is fixedly connected to a movable limit plate at the tail end of the cooling section. The movable limit plate is an L-shaped plate and is connected to the end of the integral push plate moved to the extreme position. The end of the integral push plate in contact with the movable limit plate is connected to a push rod.

[0008] As one of the preferred technical solutions, the mesh belt support described in this application is distributed with several mesh belt support rollers, and the mesh belt support plate is fixed with several mesh belt support inner supports between adjacent mesh belt support rollers. The mesh belt support inner supports are I-shaped plates, and the bottom ends of the mesh belt support inner supports are fixed to the middle part of the overall pushing plate through connecting parts.

[0009] As one of the preferred technical solutions, the mesh belts described in this application are arranged on both sides of the mesh belt support roller, and a spacing of less than 1 / 2 of the length of the mesh belt support roller is left between adjacent mesh belts.

[0010] As one of the preferred technical solutions, the heating section described in this application has a heating wire tube that is coaxially arranged and spirally distributed with it. The two ends of the heating wire tube extend out of the insulation layer of the heating section to form a heating connector, which is connected to the external temperature control circuit.

[0011] As one of the preferred technical solutions, an observation window is provided on one side of the transition section described in the present application. The length of the transition section is smaller than that of the heating section, and the length of the cooling section is larger than that of the transition section.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] The present application arranges a mesh belt with a spacing structure, and realizes the roasting of the high-porous honeycomb catalyst supported on it through the individual movement of the mesh belt and the overall movement of the mesh belt, thereby improving the roasting efficiency and quality of the catalyst as a whole and the internal pores, and realizes the improvement of roasting efficiency and cooling efficiency by reasonably arranging the structure of the preheating section, heating section, transition section and cooling section. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of this application.

[0015] Figure 2 This is a schematic diagram of the structure of the present application after removing part of the head end cover and the insulation layer.

[0016] Figure 3 It is an overall schematic diagram of the mesh belt structure in this application.

[0017] In the figure: 1. Push rod connecting plate; 2. Push rod; 3. Tail end cover; 4. Cooling section; 5. Support member; 6. Support leg; 7. Transition section; 8. Heating section; 9. Preheating section; 10. Head end cover; 11. Gas inlet valve; 12. Driving cylinder; 13. Heating connector; 14. Insulation layer; 15. Gas outlet valve; 16. Heating wire pipe; 17. Mesh belt; 18. Mesh belt bracket; 19. Mesh belt driving wheel; 20. Integral push plate; 21. Cylinder side frame plate; 22. Frame leg; 23. Mesh belt bracket inner support; 24. Mesh belt support roller; 25. Transmission belt; 26. Cylinder support block; 27. Movable limit plate. DETAILED DESCRIPTION

[0018] The technical solution described in this application is further described below with reference to the accompanying drawings. It should be noted that the directional terms that may be involved in the following paragraphs, including but not limited to "up, down, left, right, front, back", etc., are based on the visual directions shown in the corresponding drawings of the specification, and they should not be regarded as limiting the scope of protection of this technical solution. Their purpose is only to facilitate those skilled in the art to better understand the technical solution described in the specification.

[0019] In the following descriptions, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and similar expressions should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances and in conjunction with common knowledge, design specifications, and standard documents in the field.

[0020] See also Figures 1 to 3 The high-porous honeycomb catalyst mesh belt kiln described in this application includes a coaxially arranged preheating section 9, a heating section 8, a transition section 7, and a cooling section 4. The above-mentioned preheating section 9, heating section 8, transition section 7, and cooling section 4 constitute a hollow cylinder. A head end cover 10 for sealing is provided at the head end of the preheating section 9, and a tail end cover 3 for sealing is provided at the tail end of the cooling section 4.

[0021] A gas inlet valve 11 is fixedly connected to the top of the preheating section 9 and communicates with the inert gas supply pipeline. A gas outlet valve 15 is fixedly connected to the tail end of the cooling section 4 and communicates with the inert gas recovery pipeline. The gas inlet valve 11 and gas outlet valve 15 communicate with the interior spaces of the preheating section 9 and cooling section 4, respectively.

[0022] The inner bottom ends of the preheating section 9, heating section 8, transition section 7 and cooling section 4 are symmetrically provided with cylinder support blocks 26. The top ends of the cylinder support blocks 26 are connected to the corresponding cylinder side frame plates 21 above through the frame plate legs 22. A number of support rollers are rotatably connected between adjacent cylinder side frame plates 21. The support rollers are slidably connected and supported by an integral push plate 20. The integral push plate 20 contacts with a movable limit plate 27 at one end facing the cooling section 4. The movable limit plate 27 is an L-shaped structural plate, and the movable limit plate 27 is fixed between adjacent cylinder side frame plates 21.

[0023] The central portion of the integral push plate 20 is connected to an I-shaped mesh belt support inner support 23 via a connector. This mesh belt support inner support 23 is fixedly connected to the mesh belt supports 18 on either side. Several mesh belt support rollers 24 are distributed on the mesh belt supports 18. The mesh belt supports 18 are connected to the mesh belt support inner supports 23 at locations between adjacent mesh belt support inner supports 23. Mesh belt drive wheels 19 are connected to one or both ends of these mesh belt support rollers 24. These mesh belt drive wheels 19 are connected to each other via a transmission belt 25, which transmits power. The operator is connected to the mesh belt support roller 24 at the head end of the mesh belt supports 18 via an external power transmission mechanism.

[0024] The mesh belt support roller 24 is supported and driven on both sides by mesh belts 17, with gaps left between adjacent mesh belts 17, which are less than half the length of the mesh belt support roller 24. Adjacent mesh belts 17 are used to support high-porous honeycomb catalysts, so that the high-porous honeycomb structure is located above the gap structure, so that inert gas can pass through it as a protective gas, thereby accelerating the flow of heat and improving the roasting effect of the honeycomb structure.

[0025] The integral push plate 20 is connected to a push rod 2 at the end facing the rear end cover 3. The push rod 2 passes through a shaft sleeve with a sealing ring and extends from the rear end cover 3. The push rod 2 is fixedly connected to a push rod connecting plate 1 at one end away from the integral push plate 20. The other end of the push rod connecting plate 1 is fixedly connected to a driving cylinder 12. The driving cylinder 12 is arranged in the same direction as the central axis of the hollow cylinder formed by the preheating section 9, the heating section 8, the transition section 7, and the cooling section 4.

[0026] The driving cylinder 12 is located above the hollow cylinder and is fixedly connected to the preheating section 9 and cooling section 4 in the hollow cylinder through corresponding supports 5. The bottom of the support 5 is provided with symmetrically distributed legs 6 on both sides, and the legs 6 are connected to the horizontal base through fasteners.

[0027] The interior of the heating section 8 comprises a heat transfer structure made of a thermally conductive material. The outer wall of the heating section 8 is covered with a coaxially arranged, spirally arranged heating conduit 16. This heating conduit 16 is an electric heater and has a heating connector 13 extending from an insulation layer 14. This connector 13 is electrically connected to an external temperature control circuit. The insulation layer 14 covers the exterior of the heating section 8 to facilitate heat transfer to the interior of the heating section 8.

[0028] The preheating section 9 has a relatively sparse heating structure compared to the heating section 8, enabling a gradual temperature transition and increase from the preheating section 9 to the heating section 8. The transition section 7 is shorter than the cooling section 4 and the heating section 8, enabling a gradual temperature decrease toward the cooling section. The transition section 7 has an observation window for observing the internal roasting effect.

[0029] When the present application is in use, the driving cylinder 12 is controlled so that it drives the push rod connecting plate 1 and the push rod 2 through the telescopic end to extend the entire push plate 20 from the hollow cylinder formed by the preheating section 9, the heating section 8, the transition section 7, and the cooling section 4.

[0030] When the integral push plate 20 is fed into the preheating section 9 by the above structure, the mesh belt support 18 connected thereto moves to the preheating section 9 along with it, the head end cover 10 connected to the preheating section 9 is opened, and the mesh belt support roller 24 at the head end of the mesh belt support 18 is driven by an external power mechanism, so that the mesh belt 17 begins to rotate stably, while placing high-porous honeycomb catalyst on the mesh belt 17, while achieving intermittent transfer through the external power mechanism. When the required number of high-porous honeycomb catalysts are placed on the top surface of the mesh belt 17, it stops.

[0031] Close the head cover 10 so that the interior of the hollow cylinder forms a closed structure. Open the gas inlet valve 11 and the gas outlet valve 15 so that the inert gas is filled into the interior of the hollow cylinder and after a period of time, the inert gas is completely filled into the interior of the hollow cylinder. The heating structure on the preheating section 9 and the heating section 8, such as the heating wire tube 16 of the heating section 8, starts to heat up, so that the integral pushing plate 20 pulled by the push rod 2 and the high-porous honeycomb catalyst carried by the mesh belt 17 pass through the preheating section 9 and the heating section 9 in turn, so as to achieve a gradual increase in temperature and realize the roasting of the high-porous honeycomb catalyst.

[0032] After the calcination is completed, the high-porous honeycomb catalyst is sequentially moved to the transition section 7 and the cooling section 4 along with the integral push plate 20, mesh belt 17 and other structures to achieve the cooling of the calcined high-porous honeycomb catalyst. After the above cooling is completed, the gas inlet valve 11 is closed, and the gas outlet valve 15 is closed after the set time. Air at the same room temperature as the cooling section is introduced into the cooling section 4 in the hollow cylinder through the air pipe and valve, and after the hollow cylinder is cooled, the head end cover 10 is opened, and the driving cylinder 12 drives the integral push plate 20 through the push rod 2 to be sent to the preheating section 9.

[0033] Finally, although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A high-porous honeycomb catalyst mesh belt kiln, comprising a mesh belt (17), wherein the mesh belt (17) moves around a transmission path formed by the mesh belt support rollers (24) under the support of mesh belt support rollers (24) distributed on the mesh belt bracket (18), and one end or both ends of the mesh belt support rollers (24) are connected to a mesh belt drive wheel (19), and the mesh belt drive wheel (19) is driven by a transmission belt (25), characterized in that: The mesh belt support (18) has an integral push plate (20) fixedly connected thereto, the integral push plate (20) is slidably connected to the support roller body, the two ends of the support roller body are rotatably connected to the cylinder side frame plate (21), the bottom end of the cylinder side frame plate (21) is connected to the cylinder support block (26) through the frame plate support leg (22), and the cylinder support block (26) is sequentially provided with a preheating section (9), a heating section (8), a transition section (7), and a cooling section (4) in the length direction. (7) and the cooling section (4) are both hollow cylindrical structures, and a head end cover (10) for sealing the head end is provided at the head end of the preheating section (9), and a tail end cover (3) for sealing is provided at the tail end of the cooling section (4); the preheating section (9) has a gas inlet valve (11) connected to the interior thereof, and the gas inlet valve (11) is connected to an external inert gas supply pipeline; the tail end of the cooling section (4) is connected to a gas outlet valve (15), and the gas outlet valve (15) is connected to an inert gas recovery pipeline; The cooling section (4) and the preheating section (9) are fixedly connected to the outside of a support member (5), the bottom end of the support member (5) is fixedly connected to a support leg (6), and the support leg (6) is placed on a horizontal base; the top end of the support member (5) is connected to a driving cylinder (12) in the same direction as the central axis of the cylinder formed by the preheating section (9), the heating section (8), the transition section (7), and the cooling section (4); the telescopic end of the driving cylinder (12) is connected to one end of a push rod connecting plate (1), the other end of the push rod connecting plate (1) is connected to the push rod (2), and the push rod (2) extends into the cooling section (4) through the shaft sleeve of the tail end cover (3) and is connected to the end of the integral push plate (20); The cylinder side frame plate (21) is fixedly connected to a movable limiting plate (27) at a position located at the tail end of the cooling section (4); the movable limiting plate (27) is an L-shaped plate body and is connected to the end of the integral push plate (20) moved to the limit position; the end of the integral push plate (20) in contact with the movable limiting plate (27) is connected to a push rod (2); A plurality of mesh belt support rollers (24) are distributed on the mesh belt support (18), and a plurality of mesh belt support inner supports (23) are fixed between adjacent mesh belt support rollers (24) of the mesh belt support (18). The mesh belt support inner supports (23) are I-shaped plates, and the bottom ends of the mesh belt support inner supports (23) are fixed to the middle of the integral push plate (20) through connecting pieces.

2. A high-porous honeycomb catalyst mesh belt kiln according to claim 1, characterized in that: The mesh belts (17) are arranged on both sides of the mesh belt support roller (24), and a spacing less than 1 / 2 of the length of the mesh belt support roller (24) is left between adjacent mesh belts (17).

3. The high-porous honeycomb catalyst mesh belt kiln according to claim 1, characterized in that: The heating section (8) has a heating wire tube (16) coaxially arranged therewith and distributed in a spiral manner. Both ends of the heating wire tube (16) extend out of the insulation layer (14) of the heating section (8) to form a heating connector (13). The heating connector (13) is connected to an external temperature control circuit.

4. A high-porous honeycomb catalyst mesh belt kiln according to claim 3, characterized in that: An observation window is provided on one side of the transition section (7); the length of the transition section (7) is shorter than the length of the heating section (8); and the length of the cooling section (4) is longer than the length of the transition section (7).

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