Novel platinum net bracket for ammonia oxidation furnace of nitric acid device

Abstract

The utility model discloses a novel platinum net bracket for a nitric acid device ammoxidation furnace, which relates to the technical field of platinum net brackets, and comprises a circular plate, the inner wall of the circular plate is fixedly connected with a frame body, the inner wall of the circular plate is fixedly connected with two L-shaped plates relative to the lower part of the frame body, short arms of the L-shaped plates are threadedly provided with driving rods in a penetrating manner, and the short arms of the L-shaped plates are threadedly connected with the driving rods. The ends, away from each other, of the two driving rods are rotationally connected with limiting plates, the limiting plates are arc plates, the arc surfaces of the limiting plates are fixedly connected with filling pads, the sides, close to the driving rods, of the limiting plates are fixedly connected with long rods, and the long rods penetrate through short arms of the L-shaped plates. The effect of supporting the platinum net in the nitric acid ammoxidation furnace to a certain extent is achieved, and the problem that the platinum net is prone to uneven bending and uneven load and the platinum consumption rate is increased due to the fact that the platinum net is only simply connected with the inner wall of the furnace after being used for a long time is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of platinum mesh brackets, in particular to a novel platinum mesh bracket used for an ammonia oxidation furnace of a nitric acid device. Background Art

[0002] Nitric acid is a highly oxidizing and corrosive chemical raw material. Its aqueous solution is commonly known as nitric acid water or ammonia nitrogen water. It is widely used in industry to make fertilizers, pesticides, explosives, dyes, etc. In the manufacture of nitric acid raw materials, an ammonia oxidation furnace is needed. The furnace is conical in shape, with a porous gas distribution plate on the top, a platinum mesh in the middle, a porous gas distribution plate and a steam superheater pipe on the bottom. Ammonia-air mixture enters from the top and, under the action of the platinum mesh catalyst, nitrogen oxides are generated, which combine with water to form nitric acid.

[0003] The above-mentioned and existing related technologies often have the following defects: during the ammonia oxidation process, the platinum mesh works for a long time in a high-temperature, strongly oxidizing atmosphere, so the mesh surface becomes rough and uneven, and because the platinum mesh is simply connected to the inner wall of the furnace, the surface of the platinum mesh is curved and uneven, resulting in uneven load during the self-catalytic process, which leads to the problem of increasing the platinum consumption rate of the platinum mesh.

[0004] To this end, we propose a new platinum mesh bracket for the ammonia oxidation furnace of the nitric acid plant. Utility Model Content

[0005] The utility model aims to provide a novel platinum mesh bracket for an ammonia oxidation furnace of a nitric acid device, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new platinum mesh bracket for an ammonia oxidation furnace of a nitric acid device, comprising a circular plate, the inner wall of the circular plate is fixedly connected to a frame body, the inner wall of the circular plate is fixedly connected to two L-shaped plates relative to a position below the frame body, a driving rod is threaded through the short arm of the L-shaped plate, and the ends of the two driving rods that are away from each other are rotatably connected to a limiting plate.

[0007] The effect achieved by the above components is: it achieves a certain support effect on the platinum mesh in the nitric acid and ammonia oxidation furnace, thereby avoiding the problem of the platinum mesh being easily uneven and bent due to simple connection with the inner wall of the furnace after long-term use, resulting in uneven load and increased platinum consumption rate.

[0008] Preferably, the limiting plate is an arc plate, and a filling pad is fixedly connected to the arc surface of the limiting plate.

[0009] The effects achieved by the above components are: the limiting plate drives the filling pad to fit and extrude with the inner wall of the furnace, and the filling pad plays a role in better fitting with the inner wall of the furnace.

[0010] Preferably, a long rod is fixedly connected to one side of the limiting plate close to the driving rod, and the long rod passes through the short arm of the L-shaped plate.

[0011] The effect achieved by the above components is that the limit plate drives the long rod to slide on the short arm of the L-shaped plate, and the long rod achieves the effect of preventing the limit plate from rotating during the movement process.

[0012] Preferably, the long arm of the L-shaped plate is fixedly connected to a circular arc bar, and the driving rod is located below the circular arc bar.

[0013] The effect achieved by the above components is that the ammonia oxides fall down through the arc bars, and the arc bars play a role in preventing the ammonia oxides from being retained in the long arm of the L-shaped plate as much as possible.

[0014] Preferably, a limiting structure is provided at a position of the inner wall of the circular plate relative to the top of the frame, and the limiting structure includes four fixed plates, one side of the four fixed plates is fixedly connected to the inner wall of the circular plate, a sliding rod slides through the upper surface of the fixed plate, the lower surface of the sliding rod is fixedly connected to a connecting plate, and the lower surface of the connecting plate is evenly fixedly connected to a number of spikes.

[0015] The effect achieved by the above components is: achieving the effect of limiting the platinum mesh on the surface of the frame, and by limiting the edge position of the platinum mesh, the contact area with the frame is increased after the platinum mesh is laid, thereby improving the catalytic quality of the platinum mesh.

[0016] Preferably, two springs are fixedly connected to the upper surface of the connecting plate, and the other ends of the two springs are fixedly connected to the fixing plate.

[0017] The effect achieved by the above components is that the connecting plate drives the spring to contract, and the spring plays a role in further limiting the connecting plate.

[0018] Preferably, a rotating rod is fixedly connected to the upper surface of the fixed plate, a clamping plate is rotatably connected to the arc surface of the rotating rod, a clamping groove is provided on one side of the sliding rod, and one side of the clamping plate is slidably connected to the inner wall of the clamping groove.

[0019] The effect achieved by the above components is: the card plate is rotated into the card slot, and the card plate achieves the effect of temporarily limiting the connecting plate to facilitate the disassembly and assembly of the platinum mesh.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. The utility model achieves a certain support effect on the platinum mesh in the nitric acid ammonia oxidation furnace by arranging a platinum mesh bracket. Through the support of the frame, when the platinum mesh is bent due to long-term work in a high-temperature and strong oxidation environment, it is supported by the frame, making the surface load of the platinum mesh more uniform, thereby effectively reducing the platinum consumption rate of the platinum mesh. The overall structure is simple and can be quickly disassembled, so that personnel can conveniently take out the frame and the platinum mesh as a whole for replacement and cleaning.

[0022] 2. The utility model achieves the effect of limiting the platinum mesh on the surface of the frame by setting a limiting structure. By limiting the edge position of the platinum mesh, the contact area with the frame is increased after the platinum mesh is laid, thereby improving the catalytic quality of the platinum mesh. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 It is a schematic diagram of the lower partial structure of the utility model;

[0025] Figure 3 For this utility model Figure 1 Schematic diagram of the local structure;

[0026] Figure 4 It is a structural schematic diagram of the card slot of the utility model.

[0027] In the figure: 1, round plate; 2, frame; 3, L-shaped plate; 4, driving rod; 5, limiting plate; 6, filling pad; 7, long rod; 8, arc bar; 9, limiting structure; 91, fixing plate; 92, sliding rod; 93, connecting plate; 94, spikes; 95, spring; 96, rotating rod; 97, clamping plate; 98, clamping slot. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1 and Figure 2 The utility model provides a technical solution: a new platinum mesh bracket for an ammonia oxidation furnace of a nitric acid device, comprising a circular plate 1, the inner wall of the circular plate 1 is fixedly connected with a frame body 2, the inner wall of the circular plate 1 is fixedly connected with two L-shaped plates 3 relative to the position below the frame body 2, the short arm threads of the L-shaped plates 3 are penetrated by a driving rod 4, and the ends of the two driving rods 4 away from each other are rotatably connected with a limiting plate 5, so as to achieve a certain support effect on the platinum mesh in the nitric acid ammonia oxidation furnace, thereby minimizing the problem that the platinum mesh is easily uneven and bent due to being simply connected to the inner wall of the furnace after long-term use, and the uneven load increases the platinum consumption rate.

[0030] like Figure 2As shown, the limit plate 5 is an arc plate, and the arc surface of the limit plate 5 is fixedly connected with a filling pad 6. The limit plate 5 drives the filling pad 6 to fit and extrude with the inner wall of the furnace, and the filling pad 6 plays a role of better fitting with the inner wall of the furnace. The limit plate 5 is fixedly connected with a long rod 7 on the side close to the driving rod 4. The long rod 7 penetrates the short arm of the L-shaped plate 3. The limit plate 5 drives the long rod 7 to slide on the short arm of the L-shaped plate 3. The long rod 7 can prevent the limit plate 5 from rotating during the movement. The long arm of the L-shaped plate 3 is fixedly connected with an arc bar 8. The driving rod 4 is located below the arc bar 8. The ammonia oxide descends through the arc bar 8. The arc bar 8 plays a role in preventing the ammonia oxide from being retained in the long arm of the L-shaped plate 3 as much as possible.

[0031] like Figure 3 and Figure 4 As shown, a limiting structure 9 is provided at a position of the inner wall of the circular plate 1 relative to the upper part of the frame 2. The limiting structure 9 includes four fixing plates 91. One side of the four fixing plates 91 is fixedly connected to the inner wall of the circular plate 1. A sliding rod 92 is slidably penetrated through the upper surface of the fixing plate 91. A connecting plate 93 is fixedly connected to the lower surface of the sliding rod 92. A plurality of spikes 94 are evenly fixedly connected to the lower surface of the connecting plate 93, so as to achieve the effect of limiting the platinum mesh on the surface of the frame 2. By limiting the edge position of the platinum mesh, the contact area with the frame 2 is increased after the platinum mesh is laid, thereby improving the catalytic quality of the platinum mesh. Two springs 95 are fixedly connected to the upper surface of the connecting plate 93, and the other ends of the two springs 95 are fixedly connected to the fixed plate 91. The connecting plate 93 drives the springs 95 to contract, and the springs 95 play a role in further limiting the connecting plate 93. A rotating rod 96 is fixedly connected to the upper surface of the fixed plate 91, and the arc surface of the rotating rod 96 is rotatably connected to a clamping plate 97. A clamping groove 98 is provided on one side of the sliding rod 92, and one side of the clamping plate 97 is slidably connected to the inner wall of the clamping groove 98. The clamping plate 97 is rotated into the clamping groove 98, and the clamping plate 97 can achieve the effect of temporarily limiting the connecting plate 93 to facilitate the disassembly and assembly of the platinum mesh.

[0032] Working principle: When the platinum mesh needs to be laid, the platinum mesh is first laid on the upper surface of the frame 2, and then limited by the limiting structure 9, and then the circular plate 1 is moved to the inner wall of the furnace. After moving to the appropriate position, the two driving rods 4 are rotated to the side away from each other, and the driving rod 4 drives the limiting plate 5 to move through the short arm of the L-shaped plate 3, and the long rod 7 slides from the short arm of the L-shaped plate 3 through the limiting plate 5. The long rod 7 can prevent the limiting plate 5 from rotating during the movement. The limiting plate 5 then drives the filling pad 6 to fit and extrude with the inner wall of the furnace, and the filling The pad 6 plays a role in better fitting with the inner wall of the furnace, so as to limit the circular plate 1 to the inner wall of the furnace. In the production of nitric acid, the nitric acid produced by oxidation contacts with a mixture of ammonia and air, thereby red-heating the platinum mesh. The support of the platinum mesh by the frame 2 makes the surface of the platinum mesh flat after long-term use in the environment, thereby reducing the platinum consumption rate of the platinum mesh. Subsequently, a catalytic reaction occurs to form nitrogen oxides, which descend through the frame 2 and the arc bar 8. The arc bar 8 plays a role in preventing ammonia oxides from being retained on the long arm of the L-shaped plate 3 as much as possible, and then combines with water to form nitric acid raw materials.

[0033] When it is necessary to limit the platinum mesh on the upper surface of the frame 2, first rotate the clamping plate 97 to the side away from the sliding rod 92 through the rotating rod 96. After the clamping plate 97 is disengaged from the inner wall of the clamping groove 98, the clamping plate 97 achieves the effect of temporarily limiting the connecting plate 93 to facilitate the disassembly and assembly of the platinum mesh. At this time, the compressed spring 95 is in an expanded state, and the spring 95 plays a role in further limiting the connecting plate 93. The connecting plate 93 is driven to move with the help of the fixed plate 91, and the sliding rod 92 slides from the fixed plate 91 through the connecting plate 93, and the spikes 94 are inserted into the platinum mesh through the connecting plate 93, thereby limiting the flat platinum mesh and increasing the contact area with the frame 2, thereby improving the catalytic quality of the platinum mesh.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel platinum mesh bracket for an ammonia oxidation furnace of a nitric acid plant, comprising a circular plate (1), characterized in that: The inner wall of the circular plate (1) is fixedly connected to a frame body (2); two L-shaped plates (3) are fixedly connected to the inner wall of the circular plate (1) at a position below the frame body (2); a driving rod (4) is threadedly passed through the short arm of the L-shaped plate (3); and the ends of the two driving rods (4) that are away from each other are both rotatably connected to a limiting plate (5).

2. A novel platinum mesh bracket for an ammonia oxidation furnace of a nitric acid device according to claim 1, characterized in that: The limiting plate (5) is an arc plate, and a filling pad (6) is fixedly connected to the arc surface of the limiting plate (5).

3. A novel platinum mesh bracket for an ammonia oxidation furnace of a nitric acid device according to claim 1, characterized in that: A long rod (7) is fixedly connected to one side of the limiting plate (5) close to the driving rod (4), and the long rod (7) passes through the short arm of the L-shaped plate (3).

4. A novel platinum mesh bracket for an ammonia oxidation furnace of a nitric acid device according to claim 1, characterized in that: The long arm of the L-shaped plate (3) is fixedly connected to a circular arc bar (8), and the driving rod (4) is located below the circular arc bar (8).

5. A novel platinum mesh bracket for an ammonia oxidation furnace of a nitric acid device according to claim 1, characterized in that: A limiting structure (9) is provided at a position of the inner wall of the circular plate (1) relative to the upper part of the frame (2), the limiting structure (9) comprising four fixing plates (91), one side of each of the four fixing plates (91) being fixedly connected to the inner wall of the circular plate (1), a sliding rod (92) slidingly passing through the upper surface of the fixing plate (91), a connecting plate (93) being fixedly connected to the lower surface of the sliding rod (92), and a plurality of spikes (94) being evenly fixedly connected to the lower surface of the connecting plate (93).

6. A novel platinum mesh bracket for an ammonia oxidation furnace of a nitric acid device according to claim 5, characterized in that: Two springs (95) are fixedly connected to the upper surface of the connecting plate (93), and the other ends of the two springs (95) are fixedly connected to the fixing plate (91).

7. A novel platinum mesh bracket for an ammonia oxidation furnace of a nitric acid device according to claim 5, characterized in that: A rotating rod (96) is fixedly connected to the upper surface of the fixed plate (91), and a clamping plate (97) is rotatably connected to the arc surface of the rotating rod (96). A clamping groove (98) is provided on one side of the sliding rod (92), and one side of the clamping plate (97) is slidably connected to the inner wall of the clamping groove (98).

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