Novel sealing structure for rotary ammonium furnace and rotary ammonium furnace

Abstract

The utility model relates to a novel sealing structure for a rotary ammonium furnace and the rotary ammonium furnace, and belongs to the technical field of rotary equipment sealing, the novel sealing structure comprises a first mounting ring and a second mounting ring, the top of the first mounting ring is higher than the top of the second mounting ring, and an outer scale sealing assembly and an inner scale sealing assembly are arranged on the first mounting ring; the first sealing ring makes contact with the top of the second mounting ring and the outer surface of the rotary cylinder, and double sealing is achieved. A spring pressing assembly is arranged on the second mounting ring, and the sealing contact force is adjusted to adapt to cylinder thermal expansion and movement changes. In addition, a labyrinth type sealing structure is arranged at the joint of the rotary cylinder and the feeding end and the joint of the rotary cylinder and the discharging end, is composed of convex rings which are staggered and have different radiuses, and is provided with a sealing layer to prolong a leakage path. Through the combination of the multi-layer fish scale seal, the labyrinth seal and the pressing assembly, the sealing device has good sealing performance, abrasion resistance and adjustment adaptability, the reliability of equipment is effectively improved, and the service life of the equipment is effectively prolonged.

Description

Technical Field

[0001] This utility model relates to the field of rotary ammonium furnace equipment, specifically to a novel sealing structure for rotary ammonium furnaces, which can be widely used in rotary equipment in industries such as chemical and metallurgy. Background Technology

[0002] Rotary ammonium phosphate (AM) furnaces are widely used in industrial production for processes such as heating, reacting, and drying materials. As a highly efficient continuous operation device, the design of the rotary AM furnace directly affects material handling efficiency, energy utilization, and production process stability. However, sealing remains a key technical challenge during the use of rotary AM furnaces.

[0003] Traditional rotary ammonium nitrate furnace sealing structures typically employ simple rubber sealing rings or ordinary metal plate sealing devices. These sealing methods are prone to rapid wear during long-term operation due to high temperatures, high-speed rotation, and the hardness of material particles, leading to seal failure. Furthermore, these structures have poor adaptability to material expansion and contraction, as well as wear, failing to adequately meet the high-frequency usage demands of modern industrial production. Insufficient sealing performance not only causes heat loss but may also lead to the leakage of harmful gases or the intrusion of external substances, thereby affecting the equipment's operating efficiency and safety.

[0004] Currently, several improved sealing structures have been proposed to address the issues of insufficient sealing performance, short lifespan, and poor maintainability in rotary ammonium nitrate furnaces. These include designs combining labyrinth seals with flexible materials, and adding wear-resistant coatings or flexible compensation devices to the surface of sealing components. However, achieving more efficient and reliable sealing while ensuring long-term operational stability remains a challenging problem in existing technologies.

[0005] Therefore, it is particularly important to provide a new type of sealing structure to address the shortcomings of the rotary ammonium furnace sealing structure. Utility Model Content

[0006] This invention proposes a sealing assembly based on an outer fish-scale sealing component and an inner fish-scale sealing component, combined with a labyrinth seal and a spring clamping component, which can effectively improve the durability and reliability of the rotary ammonium furnace sealing structure and greatly reduce energy consumption and equipment failure caused by sealing problems during operation.

[0007] The sealing assembly includes an inlet end, an outlet end, and a rotating cylinder. Both ends are rotatably connected to the inlet end and the outlet end via sealing structures. The sealing structure comprises: a first mounting ring disposed on the inlet end and the outlet end, and a second mounting ring disposed on the rotating cylinder. The top height of the first mounting ring is higher than the top height of the second mounting ring. The first mounting ring is provided with an outer fish-scale sealing assembly and an inner fish-scale sealing assembly. One end of the outer fish-scale sealing assembly is fixed to the top of the first mounting ring, and the other end is in close contact with the top of the second mounting ring. One end of the inner fish-scale sealing assembly is fixed to the first mounting ring, and the other end is in close contact with the outer surface of the rotating cylinder.

[0008] Furthermore, the first mounting ring has an L-shaped cross-section, the outer fish scale sealing assembly is fixed to the top of the L-shape, and the inner fish scale sealing assembly is fixed above the bottom edge of the L-shape.

[0009] Furthermore, the second mounting ring has an inverted L-shaped cross-section, and the top of the inverted L-shape is positioned above the contact surface between the inner fish-scale sealing assembly and the rotating cylinder.

[0010] Furthermore, the second mounting ring is provided with a plurality of spring clamping assemblies, the spring clamping assemblies including a spring disposed below the inverted L-shaped top of the second mounting ring, and a clamping plate connected to the other end of the spring.

[0011] Furthermore, the clamping plate is a wear-resistant rigid plate.

[0012] Furthermore, the rotary cylinder is also provided with a labyrinth-type sealing structure at the connection between the inlet / outlet end.

[0013] Furthermore, the labyrinth-type sealing structure consists of several interlocking convex rings of different radii.

[0014] Furthermore, each of the intersecting convex rings of different radii is provided with a sealing layer.

[0015] Furthermore, both the outer and inner fish scale sealing components are composed of several annularly arranged stainless steel fish scales, and the contact surface between the top of the second mounting ring and the outer fish scale sealing component, as well as the contact surface between the outer surface of the rotating cylinder and the inner fish scale sealing component, are provided with a wear-resistant layer.

[0016] A rotary ammonium phosphate furnace includes a feed end, a discharge end, and a rotary cylinder. Both ends of the rotary cylinder are rotatably connected to the feed end and the discharge end through the aforementioned sealing structure.

[0017] This utility model provides a novel sealing structure for rotary ammonium nitrate furnaces. Addressing the problems of poor sealing performance, insufficient durability, and poor adaptability in existing technologies, it proposes a multi-seal design combining an external fish-scale sealing component, an internal fish-scale sealing component, a labyrinth seal, and a spring-pressing component. This design offers the following advantages:

[0018] This invention employs a dual sealing structure consisting of an outer fish-scale sealing component and an inner fish-scale sealing component. The fish-scale scales are arranged in a ring to cover the sealing surface, which not only effectively prevents the leakage of gas or particulate matter, but also adapts to the rotational movement and slight deformation of the rotating cylinder, thereby ensuring the sealing reliability under long-term operation.

[0019] Both the outer and inner fish-scale sealing components are made of stainless steel, and with the wear-resistant layer set on the key contact surfaces, the wear resistance of the device is significantly improved, the service life of the sealing structure is extended, and the equipment failure rate caused by wear is reduced.

[0020] This utility model is provided with a spring clamping assembly on the second mounting ring. The clamping assembly can adapt to the rotational movement and thermal expansion of the rotating cylinder through elastic deformation, avoiding adverse effects on the sealing structure due to assembly errors or cylinder offset during operation, thereby further improving the adaptability of the sealing structure under different working conditions. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0022] Figure 1 This is a schematic diagram of the sealing structure of this utility model;

[0023] In the attached diagram: 1. Rotary cylinder; 2. First mounting ring; 3. Second mounting ring; 4. Outer fish scale sealing assembly; 5. Inner fish scale sealing assembly; 6. Spring clamping assembly. Detailed Implementation

[0024] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments. Example 1:

[0025] This embodiment provides a novel sealing structure for a rotary ammonium furnace. The two ends of the rotary cylinder 1 are rotatably connected to the feed end and the discharge end using the sealing structure of this embodiment. The structures on both sides are the same, so this embodiment only describes one side.

[0026] like Figure 1As shown, a first mounting ring (2) with an L-shaped cross-section is provided on the outside of the feed end, and a second mounting ring (3) with an inverted L-shaped cross-section is provided on the outside of the rotating cylinder (1). An outer fish scale sealing assembly (4) is provided from the top of the first mounting ring (2) to the top of the second mounting ring (3). In this embodiment, the top height of the first mounting ring (2) is higher than the top height of the second mounting ring (3), so that the end of the outer fish scale sealing assembly (4) can be closed to achieve a sealing effect.

[0027] In addition, an inner fish-scale sealing assembly (5) is provided on the first mounting ring (2) to the outer surface of the rotating cylinder (1). The end of the inner fish-scale sealing assembly (5) is located above the L-shaped bottom edge of the first mounting ring (2), and the other end is in close contact with the outer surface of the rotating cylinder (1). The L-shaped bottom edge of the first mounting ring (2) has a certain height, so that the end of the inner fish-scale sealing assembly (5) can play a sealing role on the outer surface of the retracted rotating cylinder (1).

[0028] Both the outer and inner fish scale sealing components are made of stainless steel. With long-term use, wear will occur on the contact surfaces between them and the top of the second mounting ring (3) and the outer surface of the rotating cylinder (1). Therefore, a wear-resistant layer is provided at the contact part. In this embodiment, the wear-resistant layer is a graphite layer. Example 2:

[0029] To further improve the sealing performance, a spring clamping assembly (6) is provided for the inner fish scale sealing assembly so that its end can better contact the outer surface of the rotating cylinder (1). By setting a spring or spring plunger on the top of the second mounting ring (3) with an inverted L-shaped cross-section, and connecting a clamping plate to the other end of the spring or spring plunger, the spring or spring plunger always applies inward pressure to the clamping plate, so that it always squeezes the inner fish scale, thereby improving the sealing performance of the inner fish scale sealing assembly.

[0030] In this embodiment, the clamping components (6) are spaced apart and arranged inside the annular protrusion at the top of the second mounting ring (3), and their number can be adjusted according to the radius of the rotating cylinder (1). Since the clamping plate in the clamping component (6) will inevitably wear out after long-term use, the clamping plate in this embodiment is made of wear-resistant rigid plate, such as wear-resistant alloy steel, stainless steel, high-performance ceramic or carbide composite material.

[0031] Based on the above embodiments, in order to further improve the sealing performance, a labyrinth-type sealing structure is set at the connection between the rotary cylinder (1) and the feed end / discharge end. Specifically, the labyrinth-type sealing structure consists of several intersecting convex rings of different radii, and each convex ring surface is coated with a wear-resistant sealing layer. By extending the leakage path, the sealing effect is enhanced.

[0032] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to specific implementation methods. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. A novel sealing structure for a rotary ammonium phosphate furnace, comprising a feed end, a discharge end, and a rotary cylinder (1), wherein both ends of the rotary cylinder (1) are rotatably connected to the feed end and the discharge end via a sealing structure, characterized in that, The sealing structure includes: a first mounting ring (2) set on the inlet end and the outlet end and a second mounting ring (3) set on the rotary cylinder (1), the top height of the first mounting ring (2) is higher than the top height of the second mounting ring (3); the first mounting ring (2) is provided with an outer fish scale sealing component (4) and an inner fish scale sealing component (5); one end of the outer fish scale sealing component (4) is fixed to the top of the first mounting ring (2), and the other end is in close contact with the top of the second mounting ring (3); one end of the inner fish scale sealing component (5) is fixed on the first mounting ring (2), and the other end is in close contact with the outer surface of the rotary cylinder (1).

2. The novel sealing structure for a rotary ammonium phosphate furnace according to claim 1, characterized in that: The first mounting ring (2) has an L-shaped cross section. The outer fish scale sealing assembly (4) is fixed on the top of the L-shape, and the inner fish scale sealing assembly (5) is fixed above the bottom edge of the L-shape.

3. The novel sealing structure for a rotary ammonium phosphate furnace according to claim 1, characterized in that: The second mounting ring (3) has an inverted L-shaped cross section, and the top of the inverted L-shaped top is located above the contact surface between the inner fish scale sealing assembly (5) and the rotating cylinder (1).

4. The novel sealing structure for a rotary ammonium phosphate furnace according to claim 3, characterized in that: The second mounting ring (3) is provided with a plurality of spring clamping assemblies (6), the spring clamping assembly (6) including a spring disposed below the inverted L-shaped top of the second mounting ring (3) and a clamping plate connected to the other end of the spring.

5. The novel sealing structure for a rotary ammonium phosphate furnace according to claim 4, characterized in that: The clamping plate is a wear-resistant rigid plate.

6. The novel sealing structure for a rotary ammonium phosphate furnace according to claim 1, characterized in that: The rotary cylinder (1) is also provided with a labyrinth-type sealing structure at the connection between the feed end / discharge end.

7. The novel sealing structure for a rotary ammonium nitrate furnace according to claim 6, characterized in that: The labyrinth-type sealing structure consists of several interlocking convex rings of different radii.

8. The novel sealing structure for a rotary ammonium phosphate furnace according to claim 7, characterized in that: Each of the intersecting convex rings of different radii is provided with a sealing layer.

9. The novel sealing structure for a rotary ammonium phosphate furnace according to claim 1, characterized in that: Both the outer fish scale sealing assembly (4) and the inner fish scale sealing assembly (5) are made of several stainless steel fish scales arranged in a ring. The top of the second mounting ring (3) and the contact surface between the outer fish scale sealing assembly (4) and the outer surface of the rotating cylinder (1) and the contact surface between the inner fish scale sealing assembly (5) are provided with a wear-resistant layer.

10. A rotary ammonium phosphate furnace, comprising a feed end, a discharge end, and a rotary cylinder (1), characterized in that: The two ends of the rotary cylinder (1) are rotatably connected to the feed end and the discharge end through the novel sealing structure for rotary ammonium furnace as described in any one of claims 1-9.

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