Platinum net bracket device of ammoxidation furnace

Abstract

The invention discloses an ammoxidation furnace platinum net bracket device which comprises a rotating seat, the rotating seat is coaxially fixed on an output shaft of a main motor of an ammoxidation furnace, a conical platinum net rack is rotatably arranged on the rotating seat, the platinum net rack is arranged in the radial direction of a furnace body of the ammoxidation furnace, and a connecting ring is arranged at the front end of the platinum net rack. The connecting ring is rotationally arranged on the rotating seat, a base matched with the inner wall of a furnace body of the ammoxidation furnace is arranged at the rear end of the platinum net rack, the rear end of the platinum net rack is rotationally arranged on the base, the platinum net rack is made of platinum rhodium alloy wires, a plurality of platinum net racks are arranged on the circumference of the rotating seat at equal intervals, and a driving assembly is arranged on the base. The driving assembly is used for driving the platinum net frame to rotate, a shaping frame is arranged between the rotating seat and the base, one end of the shaping frame is fixed to the rotating seat, the other end of the shaping frame is fixed to the base, and the shaping frame is arranged in the generatrix direction of the platinum net frame. The problem that a lower-layer platinum net in a middle-layer structure in the prior art is not fully utilized is solved.

Description

Technical Field

[0001] The invention belongs to the field of ammonia oxidation furnace equipment, and in particular relates to a platinum mesh bracket device for an ammonia oxidation furnace. Background Art

[0002] The chemical composition of each platinum mesh in the currently widely used platinum alloy catalytic mesh is the same. In the ammonia oxidation furnace, after the ammonia gas flow enters the reactor, the upper layers of platinum-rhodium alloy mesh catalysts first contact the ammonia gas and react at the same time, and move downward along the gas flow, while the lower layers of catalysts along the gas flow direction contact the ammonia gas later. Through the analysis of the catalytic effect of the catalyst, it can be concluded that in the process of the platinum catalyst catalytic action, most of the gas that first contacts the platinum mesh has completed the reaction, and only a small part of the gas will react under the catalysis of the following platinum mesh. Therefore, a part of the platinum mesh in the current platinum catalyst structure is ineffective, which not only does not contribute to the improvement of the ammonia oxidation rate, but also increases the filling amount of precious metal platinum, increases platinum consumption, and greatly increases production costs. Summary of the invention

[0003] The purpose of the present invention is to solve the problem that the lower platinum mesh in the middle layer structure of the prior art is not fully utilized, and to propose a platinum mesh bracket device for an ammonia oxidation furnace.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a platinum mesh bracket device of an ammonia oxidation furnace, comprising a rotating seat, which is coaxially fixed on the output shaft of the main motor of the ammonia oxidation furnace, and a platinum mesh frame is rotatably arranged on the rotating seat, the platinum mesh frame is in the shape of a cone, and the platinum mesh frame is radially arranged along the furnace body of the ammonia oxidation furnace, a connecting ring is arranged at the front end of the platinum mesh frame, and the connecting ring is rotatably arranged on the rotating seat, and a base adapted to the inner wall of the furnace body of the ammonia oxidation furnace is arranged at the rear end of the platinum mesh frame, and the rear end of the platinum mesh frame is rotatably arranged on the base, the platinum mesh frame is made of platinum-rhodium alloy wire, and a plurality of platinum mesh frames are arranged at equal intervals on the circumference of the rotating seat, and a driving assembly is arranged on the base, and the driving assembly is used to drive the platinum mesh frame to rotate.

[0005] As a further description of the above technical solution: the cross-section of the rotating seat is an octagon, each vertical side of the rotating seat is provided with a connecting shaft, each connecting shaft corresponds to one of the platinum grids, the connecting ring is rotatably set on the connecting shaft, a spring is sleeved on the connecting shaft, and the spring is located between the vertical side and the connecting ring.

[0006] As a further description of the above technical solution: an outer gear ring is fixedly provided at the rear end of the platinum grid frame, an inner gear ring is provided on the inner wall of the furnace body of the ammonia oxidation furnace, a driving gear meshing with the inner gear ring is rotatably provided on the base, a driven gear meshing with the outer gear ring is provided on the base, and the driven gear and the driving gear are transmitted through a bevel gear set. When the rotating seat drives the platinum grid frame and the base to rotate around the inner wall of the furnace body of the ammonia oxidation furnace, the driving gear rotates to drive the driven gear to rotate, and the driven gear drives the outer gear ring to drive the platinum grid frame to rotate.

[0007] As a further description of the above technical solution: a shaping frame is arranged between the rotating seat and the base, one end of the shaping frame is fixed on the rotating seat, and the other end is fixed on the base, and the shaping frame is arranged along the busbar direction of the platinum grid.

[0008] As a further description of the above technical solution: a cleaning brush is rotatably arranged on the shaping frame, and the cleaning brush is made of ceramic fiber material.

[0009] As a further description of the above technical solution: the rotating shaft of the cleaning brush and the rotating shaft of the driven gear are connected via a universal joint.

[0010] As a further description of the above technical solution: a protective cover is arranged on the rotating seat, and a semicircular notch adapted to the connecting ring is opened on the protective cover.

[0011] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0012] (1) The platinum grid stirs the gas flow by rotating around the ammonia oxidation furnace, and at the same time, the platinum grid itself rotates around its axis, so that each position on the platinum grid is in contact with the gas, and the contact time is uniform, so that the platinum grid is fully utilized, the gas and the platinum grid are fully in contact and react, and the cost is reduced.

[0013] (2) The conical platinum grid has a stable structure and good self-supporting property, and the set shaping frame can further correct the shape of the platinum grid in real time.

[0014] (3) The protective cover is set so that the internal reaction gas must react with the platinum grid before flowing from the top to the bottom of the ammonia oxidation furnace, so that the gas reacts fully.

[0015] (4) The cleaning brush arranged on the shaping frame cleans the surface of the platinum grid frame and can remove dust and impurities deposited on the surface of the platinum grid frame. The shaping frame and the cleaning brush are arranged at the bottom of the platinum grid frame so that the cleaned impurities and dust can be discharged in time from the discharge port of the ammonia oxidation furnace under the condition of gas flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1is a side view of the present invention, wherein the platinum grid portion is shown in the form of a partial cross-sectional view;

[0017] Figure 2 is a side view of a platinum grid of the present invention, wherein only one platinum grid is shown;

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the rotating seat and the platinum grid of the present invention, wherein only one platinum grid is shown;

[0019] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the rotating seat and the platinum grid frame of the present invention from another angle, wherein only one platinum grid frame is shown;

[0021] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0022] Legend: 1. Ammonia oxidation furnace; 2. Rotating seat; 3. Connecting shaft; 4. Platinum grid; 5. Connecting ring; 6. Base; 7. Spring; 8. Protective cover; 9. Semicircular notch; 10. Outer gear ring; 12. Mounting groove; 13. Driving gear; 14. Driven gear; 15. Bevel gear set; 16. Shaping frame; 17. Cleaning brush; 18. Universal joint. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-6 The present invention provides a technical solution for a platinum mesh bracket device for an ammonia oxidation furnace:

[0025] A platinum net bracket device for an ammonia oxidation furnace comprises a rotating seat 2 coaxially fixed on the output shaft of the main motor of the ammonia oxidation furnace 1, the cross section of the rotating seat 2 is an octagon, each vertical side of the rotating seat 2 is provided with a connecting shaft 3, each connecting shaft 3 is rotatably provided with a platinum net frame 4, the platinum net frame 4 is in a cone shape, the platinum net frame 4 is made of platinum-rhodium alloy wire, the front end of the platinum net frame 4 is provided with a connecting ring 5, the connecting ring 5 is rotatably provided on the connecting shaft 3 of the rotating seat 2, the platinum net frame 4 is radially arranged along the furnace body of the ammonia oxidation furnace 1, the axis of the platinum net frame 4 is perpendicular to the rotation axis of the connecting seat, and the rear end of the platinum net frame 4 is provided with a base 6 adapted to the inner wall of the furnace body of the ammonia oxidation furnace 1. A spring 7 is sleeved on the connecting shaft 3, the spring 7 is located between the vertical side and the connecting ring 5, and under the action of the spring 7, the base 6 at the rear end of the platinum net frame 4 is pressed against the inner wall of the furnace body of the ammonia oxidation furnace 1. When the main motor drives the shaft 3 to rotate, the connecting shaft 3 and the platinum grid 4 arranged thereon rotate in the furnace body of the ammonia oxidation furnace 1 at the same time.

[0026] A protective cover 8 is provided on the rotating seat 2. A semicircular notch 9 adapted to the connecting ring 5 is provided on the protective cover 8. The protective cover 8 blocks the gap between the rotating seat 2 and the platinum grid 4 so that the reaction gas above does not flow through the gap between the two.

[0027] The base 6 is provided with a driving assembly, which is used to drive the platinum grid frame 4 to rotate around the connecting shaft 3 and the base 6. An outer gear ring 10 is fixedly provided at the rear end of the platinum grid frame 4, and an inner gear ring is provided on the inner wall of the furnace body of the ammonia oxidation furnace 1. A mounting groove 12 is provided on the side of the inner wall of the base 6 facing the furnace body, and a driving gear 13 is rotatably provided in the mounting groove 12, and the driving gear 13 is meshed with the inner gear ring. A driven gear 14 is rotatably provided on the side of the inner wall of the base 6 away from the furnace body, and the driven gear 14 is meshed with the outer gear ring 10. The rotating shaft of the driven gear 14 and the rotating shaft of the driving gear 13 are driven by a bevel gear set 15. When the platinum grid frame 4 and the base 6 rotate around the inner wall of the furnace body, the inner gear ring drives the driving gear 13 to rotate, and the driving gear 13 drives the outer gear ring 10 to rotate under the transmission of the gear set, so that the platinum grid frame 4 rotates around the connecting shaft 3.

[0028] A shaping frame 16 is provided between the rotating seat 2 and the base 6, one end of the shaping frame 16 is fixed on the rotating seat 2, and the other end is fixed on the base 6, and the shaping frame 16 is arranged along the generatrix direction of the platinum grid 4. The shaping frame 16 is an arc-shaped frame adapted to the outer side of the platinum grid 4 as a whole, and the shaping frame 16 is arranged at the lower end of the platinum grid 4, which can support the platinum grid 4 on the one hand, and can reset the deformed platinum grid 4 on the other hand.

[0029] A cleaning brush 17 is rotatably provided on the shaping frame 16. The cleaning brush 17 is made of ceramic fiber material. The rotating shaft of the cleaning brush 17 is connected to the rotating shaft of the driven gear 14 through a universal joint 18. Therefore, when the driven gear 14 rotates, it can drive the cleaning brush 17 to rotate to clean the surface of the platinum grid 4. The rotatable cleaning brush 17 can prevent uneven wear of its bristles.

[0030] Working principle: When the ammonia oxidation furnace 1 is working, under the action of the main motor, multiple platinum grids 4 in the ammonia oxidation furnace 1 rotate around the rotating seat 2 at the same time, and each platinum grid 4 also rotates. The platinum grid 4 stirs the gas flow by rotating around the ammonia oxidation furnace 1, and the platinum grid 4 rotates around its axis, so that each position on the platinum grid 4 is in contact with the gas, and the contact time is uniform, so that the platinum grid is fully utilized, and the gas is fully in contact with the platinum grid and fully reacts.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Within the technical scope disclosed by the present invention, technicians familiar with the technical field can make equivalent replacements or changes based on the technical scheme and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A platinum mesh bracket device for an ammonia oxidation furnace, characterized in that: The invention comprises a rotating seat (2), wherein the rotating seat (2) is coaxially fixed on the output shaft of the main motor of the ammonia oxidation furnace (1), a platinum grid frame (4) is rotatably arranged on the rotating seat (2), the platinum grid frame (4) is in the shape of a cone, and is arranged radially along the furnace body of the ammonia oxidation furnace (1), a connecting ring (5) is arranged at the front end of the platinum grid frame (4), and the connecting ring (5) is rotatably arranged on the rotating seat (2), a base (6) adapted to the inner wall of the furnace body of the ammonia oxidation furnace (1) is arranged at the rear end of the platinum grid frame (4), and the rear end of the platinum grid frame (4) is rotatably arranged on the base (6), the platinum grid frame (4) is made of platinum-rhodium alloy wire, a plurality of platinum grid frames (4) are arranged at equal intervals on the circumference of the rotating seat (2), and a driving component is arranged on the base (6), and the driving component is used to drive the platinum grid frame (4) to rotate.

2. The platinum mesh bracket device for an ammonia oxidation furnace according to claim 1, characterized in that: The cross section of the rotating seat (2) is an octagon. Each vertical side surface of the rotating seat (2) is provided with a connecting shaft (3). Each connecting shaft (3) corresponds to one of the platinum grids (4). The connecting ring (5) is rotatably arranged on the connecting shaft (3). A spring (7) is sleeved on the connecting shaft (3). The spring (7) is located between the vertical side surface and the connecting ring (5).

3. The platinum mesh bracket device for an ammonia oxidation furnace according to claim 1, characterized in that: An outer gear ring (10) is fixedly provided at the rear end of the platinum grid frame (4), an inner gear ring is provided on the inner wall of the furnace body of the ammonia oxidation furnace (1), a driving gear (13) meshing with the inner gear ring is rotatably provided on the base (6), a driven gear (14) meshing with the outer gear ring (10) is provided on the base (6), and transmission is provided between the driven gear (14) and the driving gear (13) via a bevel gear set (15); when the rotating seat (2) drives the platinum grid frame (4) and the base (6) to rotate around the inner wall of the furnace body of the ammonia oxidation furnace (1), the driving gear (13) rotates to drive the driven gear (14) to rotate, and the driven gear (14) drives the outer gear ring (10) to drive the platinum grid frame (4) to rotate.

4. The platinum mesh bracket device for an ammonia oxidation furnace according to claim 3, characterized in that: A shaping frame (16) is arranged between the rotating seat (2) and the base (6); one end of the shaping frame (16) is fixed on the rotating seat (2) and the other end is fixed on the base (6); the shaping frame (16) is arranged along the generatrix direction of the platinum grid frame (4).

5. The platinum mesh bracket device for an ammonia oxidation furnace according to claim 4, characterized in that: A cleaning brush (17) is rotatably arranged on the shaping frame (16), and the cleaning brush (17) is made of ceramic fiber material.

6. The platinum mesh bracket device for an ammonia oxidation furnace according to claim 5, characterized in that: The rotating shaft of the cleaning brush (17) is connected to the rotating shaft of the driven gear (14) via a universal joint (18).

7. The platinum mesh bracket device for an ammonia oxidation furnace according to claim 2, characterized in that: The rotating seat (2) is provided with a protective cover (8), and the protective cover (8) is provided with a semicircular notch (9) adapted to the connecting ring (5).

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