Silicon carbide desulfurization nozzle with pre-alignment structure

Abstract

The utility model discloses a kind of silicon carbide desulfurization nozzles with pre-alignment structure belongs to desulfurization equipment technical field;The nozzle includes silicon carbide desulfurization nozzle body, first mounting ring fixed on silicon carbide desulfurization nozzle body, spray pipe, second mounting ring fixed on spray pipe and bolt for fastening;It further includes a positioning assembly;The positioning assembly includes first connecting block fixed on first mounting ring, rotatably connected second connecting block, slidingly arranged slider, clamping block and screw and nut for driving slider;By operating nut, slider is driven by screw to slide, so as to drive second connecting block to rotate, make clamping block and second mounting ring clamping joint cooperation, pre-alignment before bolt fastening is realized.The utility model passes through the positioning assembly, solved the problem that the installation centering of silicon carbide nozzle is difficult due to the brittleness of material, easily damaged, significantly improved the precision, efficiency and safety of installation, guarantee the reliability of equipment operation.

Description

Technical Field

[0001] This utility model relates to the field of desulfurization equipment technology, and in particular to a silicon carbide desulfurization nozzle with a pre-alignment structure. Background Technology

[0002] In industrial production such as coal-fired power plants and steel smelting, wet flue gas desulfurization is the mainstream technology for controlling sulfur dioxide emissions. This process is usually completed in a large spray tower, where desulfurization slurry such as limestone and gypsum is atomized and sprayed through numerous nozzles, allowing it to fully contact and react with the flue gas. As the core component of this process, the nozzles operate in an extremely harsh environment, enduring the scouring of high-velocity, highly corrosive, and highly abrasive slurry for extended periods.

[0003] To cope with these harsh operating conditions, silicon carbide, due to its superior hardness, excellent wear resistance, and outstanding chemical corrosion resistance, has become the preferred material for manufacturing high-performance desulfurization nozzles. Nozzles made of silicon carbide have a service life far exceeding that of traditional metal or ordinary ceramic nozzles, ensuring the long-term stable operation of the desulfurization system.

[0004] However, while silicon carbide materials possess many advantages, they also have an inherent and significant physical characteristic: high brittleness, poor toughness, and weak impact and bending resistance. In practical applications, large silicon carbide desulfurization nozzles are typically connected and fixed using flanges (i.e., the mounting rings in this solution). During equipment maintenance or nozzle replacement, the two heavy flanges need to be aligned and bolted in for tightening. Due to the nozzle's weight and limited installation space, precise alignment by hand is an extremely difficult task.

[0005] During installation, if the two flange faces are not perfectly aligned, forcibly installing or tightening the bolts will subject the brittle silicon carbide desulfurization nozzle body and flange connection to enormous uneven stress and shear force. This can easily lead to chipping of the flange connection surface, or even cause cracks or direct breakage of the entire expensive silicon carbide desulfurization nozzle body, resulting in serious economic losses. This connection method, which relies on manual experience, has high installation risks, and is inefficient, has become a prominent technical bottleneck in the application and promotion of silicon carbide desulfurization nozzles.

[0006] Therefore, this invention proposes a silicon carbide desulfurization nozzle with a pre-alignment structure to address the shortcomings of the prior art. Utility Model Content

[0007] To overcome the above shortcomings, this utility model provides a silicon carbide desulfurization nozzle with a pre-alignment structure, which aims to improve the problems of difficult alignment during installation of silicon carbide desulfurization nozzles in the prior art, which easily leads to component damage, and insufficient sealing reliability at the connection.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a silicon carbide desulfurization nozzle with a pre-alignment structure, comprising: a silicon carbide desulfurization nozzle body, a first mounting ring, a nozzle pipe, a second mounting ring, and bolts; and a positioning component.

[0009] The positioning component includes a first connecting block fixed to the outside of the first mounting ring; a second connecting block rotatably connected to the inside of the first connecting block via a connecting rod, and the second connecting block has a groove; a slider slidably connected to the groove; a locking block fixedly connected above the second connecting block; and a screw with one end fixedly connected to the slider and the other end passing through the first connecting block and threadedly engaged with a nut.

[0010] Furthermore, the first connecting block of the positioning component is fixed to the first mounting ring, while the locking block of the positioning component is used to detachably engage with the second mounting ring. By combining them in this way, the first mounting ring and the second mounting ring can be pre-aligned and locked before the bolt is tightened.

[0011] Preferably, the inner side of the second mounting ring has a groove for accommodating the card block at the position of the card block.

[0012] Preferably, the silicon carbide desulfurization nozzle further includes a sealing assembly disposed between the mating surfaces of the first mounting ring and the second mounting ring.

[0013] Preferably, the sealing assembly includes a metal spiral wound gasket disposed on the mating surface of the second mounting ring.

[0014] Preferably, a composite sealing gasket is tightly fitted to the radial inner side of the metal spiral wound gasket.

[0015] Preferably, a sealing ring is fixed on the composite sealing gasket.

[0016] Preferably, the metal spiral wound pad is in contact with the inner wall of the second mounting ring.

[0017] Preferably, a sealing ring is provided between the metal spiral wound pad and the second mounting ring.

[0018] This utility model has the following beneficial effects: 1. In this utility model, by setting an independent positioning component, which is mechanically linked by a nut, screw, slider and rotating connecting block, the two mounting rings can be automatically and accurately aligned and pre-locked before the main bolt is tightened. This solves the problem that the nozzle flange installation in the prior art relies on manual alignment, which is difficult and inefficient, and is prone to damage to bolts or brittle silicon carbide desulfurization nozzle body due to misalignment. It achieves the technical effect of simplifying the installation process, greatly improving the installation accuracy and efficiency, effectively protecting the core components and improving the installation safety.

[0019] 2. In this utility model, by setting a multi-layered composite sealing assembly consisting of a sealing ring, a metal spiral wound gasket, a composite sealing gasket, and a sealing ring between the mating surfaces of the two mounting rings, the problem of easy failure of the single sealing structure in the prior art under the conditions of strong corrosion, high wear, and high pressure of desulfurization slurry, leading to leakage at the connection, is solved. This achieves multiple protections and layered defenses, greatly enhancing the long-term sealing reliability and durability of the connection point, effectively preventing the leakage of harmful media, and ensuring the safe and stable operation of the equipment. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a silicon carbide desulfurization nozzle with a pre-alignment structure proposed in this utility model. Figure 2 This is a schematic diagram of the locking block structure of a silicon carbide desulfurization nozzle with a pre-alignment structure proposed in this utility model. Figure 3 This is a schematic diagram of the nozzle section of a silicon carbide desulfurization nozzle with a pre-alignment structure proposed in this utility model. Figure 4 This is a schematic diagram of the composite sealing gasket structure of a silicon carbide desulfurization nozzle with a pre-alignment structure proposed in this utility model.

[0021] Legend: 1. Silicon carbide desulfurization nozzle body; 2. First mounting ring; 3. Bolt; 4. Positioning assembly; 401. First connecting block; 402. Second connecting block; 403. Slider; 404. Locking block; 405. Screw; 406. Nut; 407. Connecting rod; 5. Second mounting ring; 6. Nozzle; 7. Sealing assembly; 701. Sealing ring; 702. Composite sealing gasket; 703. Metal spiral wound gasket; 704. Sealing ring. Detailed Implementation

[0022] Please refer to Figures 1 to 4 This utility model provides a silicon carbide desulfurization nozzle with a pre-alignment structure, which aims to solve the problems of difficult alignment during installation of silicon carbide desulfurization nozzles in the prior art, which easily leads to component damage, and insufficient sealing reliability at the connection.

[0023] The overall frame of the silicon carbide desulfurization nozzle with pre-alignment structure includes a silicon carbide desulfurization nozzle body 1, a first mounting ring 2, a nozzle pipe 6, and a second mounting ring 5. The first mounting ring 2 is fixedly connected to the bottom of the silicon carbide desulfurization nozzle body 1, and the second mounting ring 5 is fixedly connected to the nozzle pipe 6. During installation, the end face of the second mounting ring 5 is aligned with the end face of the first mounting ring 2. Multiple bolts 3 are detachably passed through the first mounting ring 2 and the second mounting ring 5 to achieve a tight connection between the two, providing a structural foundation for subsequent sealing and stable operation.

[0024] To solve the problem of precise alignment between the first mounting ring 2 and the second mounting ring 5 before tightening, the silicon carbide desulfurization nozzle with pre-alignment structure is equipped with a sophisticated positioning component 4. The structure and operation of the positioning component 4 are as follows: The first connecting block 401 serves as the mounting base for the entire positioning assembly 4 and is firmly fixed to the outside of the first mounting ring 2. The second connecting block 402 is rotatably connected to the inside of the first connecting block 401 via the connecting rod 407. The connecting rod 407 provides a fixed rotation center for the second connecting block 402, and a sliding groove is specially provided on the second connecting block 402. The slider 403 can slide along the length of the groove opened on the second connecting block 402, and a locking block 404 for final locking is firmly connected above the slider 403. To drive the entire mechanism to move, a screw 405 is provided. One end of the screw 405 is fixedly connected to the slider 403 to form an integral motion unit, while the other end of the screw 405 extends and passes through the first connecting block 401. After passing through, this end forms a threaded engagement with the nut 406. When the nut 406 is rotated, the nut 406 moves along the axis of the screw 405, thereby pulling the screw 405 and the slider 403 fixed thereto to produce axial displacement. Under the guidance of the sliding groove, the displacement of the slider 403 will force the second connecting block 402 to rotate around the connecting rod 407. This combined sliding and rotating motion allows the locking block 404 connected above the slider 403 to move along a preset trajectory and finally accurately lock into the groove opened on the inner side of the second mounting ring 5 corresponding to the position of the locking block 404. Through this mechanical linkage, the initial locking and precise alignment of the first mounting ring 2 and the second mounting ring 5 are achieved before the bolt 3 is tightened.

[0025] The sealing assembly 7 is housed in the internal cavity formed after the first mounting ring 2 and the second mounting ring 5 are mated. Its main components are pre-set on the mating surface of the second mounting ring 5. Through the radial and axial combination of multiple layers of materials, a tight leak-proof barrier is constructed. Specifically, the metal spiral wound gasket 703, serving as the main sealing structure, is disposed on the mating surface of the second mounting ring 5. A composite sealing gasket 702, serving as an enhanced sealing layer, is tightly fitted on the radial inner side of the metal spiral wound gasket 703. The composite sealing gasket 702 further fills the potential gaps and works in conjunction with the metal spiral wound gasket 703 to withstand pressure. On the composite sealing gasket 702, the innermost sealing ring 701 is also firmly fixed. This sealing ring 701 is tightly fitted to the inner wall of the second mounting ring 5 and directly faces the flowing desulfurization slurry, playing the role of blocking and protecting the internal sealing structure. In addition to the multi-layered layout in the radial direction, in the axial dimension, an elastic sealing ring 704 is disposed between the metal spiral wound gasket 703 and the second mounting ring 5 and is tightly fitted to the axial bottom surface of the metal spiral wound gasket 703. The elastic deformation of the sealing ring 704 fills the microscopic unevenness between the metal parts, forming a preliminary and effective seal. This multi-layered, composite sealing structure, consisting of a sealing ring 704, a metal spiral wound gasket 703, a composite sealing gasket 702, and a sealing ring 701, works in concert under the enormous axial pressure generated by tightening the bolts 3. This comprehensive sealing of the structure from the inside out and from the axial to the radial direction completely blocks any possible leakage paths, thereby ensuring the high stability and durability of the entire nozzle connection under harsh working conditions.

[0026] As a preferred embodiment, to ensure that the locking action of the positioning component 4 is accurate and reliable, the inner side of the second mounting ring 5 is provided with a groove that matches the shape of the locking block 404 at the position of the locking block 404. When the locking block 404 enters the groove, a tight engagement is formed, thereby restricting any relative rotation or misalignment between the first mounting ring 2 and the second mounting ring 5.

[0027] As another preferred embodiment, in order to achieve a reliable seal, a sealing component 7 is provided between the mating surfaces of the first mounting ring 2 and the second mounting ring 5. In a specific embodiment, the sealing component 7 includes a metal spiral wound gasket 703, which is disposed on the mating surface of the second mounting ring 5. The metal spiral wound gasket 703 is formed by alternating winding of metal strips with V-shaped or W-shaped cross sections and non-metallic filler strips such as flexible graphite, and has excellent compression and resilience performance, which can effectively seal the unevenness of the flange surface under the huge pre-tightening force of the bolts 3.

[0028] To further enhance the sealing performance, a composite sealing gasket 702 is also tightly fitted on the radial inner side of the metal spiral wound gasket 703. The composite sealing gasket 702 can be made of reinforced graphite plate or filled with polytetrafluoroethylene, and its presence constitutes a second radial sealing defense.

[0029] As a further preferred option, a sealing ring 701 is also fixed on the composite sealing gasket 702. The sealing ring 701, as the innermost component that directly contacts the fluid medium, is usually made of corrosion-resistant and wear-resistant metal or hard alloy to protect the softer inner composite sealing gasket 702 and metal spiral wound gasket 703 from the scouring of high-speed slurry.

[0030] Specifically, a portion of the metal spiral wound pad 703 is fitted against the inner wall of the second mounting ring 5. This configuration may be such that, at a specific angle or in a localized area, the edge of the metal spiral wound pad 703 extends to contact the inner diameter wall of the second mounting ring 5 to provide additional radial support.

[0031] Specifically, an elastic sealing ring 704 is disposed between the metal spiral wound gasket 703 and the second mounting ring 5. Specifically, the sealing ring 704 can be accommodated in a pre-set annular groove on the mating surface of the second mounting ring 5, and fills the structural gap between the metal spiral wound gasket 703 and the second mounting ring 5 in the area where the metal spiral wound gasket 703 is not in contact with the inner wall of the second mounting ring 5, providing an auxiliary elastic seal.

[0032] Working principle: When installation is required, the positioning component 4 is first operated to achieve precise alignment of the first mounting ring 2 and the second mounting ring 5. The operator rotates the nut 406, which moves axially through the threaded engagement with the screw 405, thereby pulling the screw 405 fixedly connected to the slider 403. The slider 403 slides in the groove opened on the second connecting block 402. Since the second connecting block 402 itself is rotatably connected to the fixed first connecting block 401 through the connecting rod 407, the linear movement of the slider 403 drives the second connecting block 402 to produce a precise angular rotation. The locking block 404 fixedly connected above the second connecting block 402 also moves accordingly, and finally accurately locks into the groove on the inner side of the second mounting ring 5, completing the pre-alignment and locking of the two mounting rings.

[0033] After precise positioning, multiple bolts 3 are passed through the first mounting ring 2 and the second mounting ring 5 and tightened evenly. The huge axial pressure generated by the bolts 3 acts on the mating surface of the two mounting rings and is transmitted to the internal sealing component 7. Under this pressure, the sealing ring 704 located between the metal spiral wound gasket 703 and the second mounting ring 5 first undergoes elastic deformation, filling the microscopic gaps on the metal surface. As the pressure continues to increase, the metal spiral wound gasket 703 is compressed, and the metal strip inside it works together with the flexible filling material to form a strong rebound force to seal the leakage at higher pressures. At the same time, the composite sealing gasket 702 located radially inside the metal spiral wound gasket 703 is also compressed to form another radial seal. The innermost sealing ring 701 directly resists the scouring of the medium. Through the synergistic effect of these multiple structures, comprehensive sealing from the outside to the inside and from the axial to the radial direction is achieved.

Claims

1. A silicon carbide desulfurization nozzle with a pre-alignment structure, comprising: Silicon carbide desulfurization nozzle body (1); The first mounting ring (2) is fixedly connected to the bottom of the silicon carbide desulfurization nozzle body (1); Nozzle (6); The second mounting ring (5) is fixedly connected to the nozzle (6) and is used to dock with the first mounting ring (2); Bolt (3), which detachably passes through the first mounting ring (2) and the second mounting ring (5) to fasten the two, is characterized in that: The silicon carbide desulfurization nozzle includes a positioning component (4), which includes a first connecting block (401) fixed to the outside of the first mounting ring (2); a second connecting block (402) is rotatably connected to the inside of the first connecting block (401) via a connecting rod (407), and a groove is provided on the second connecting block (402); a slider (403) is slidably connected in the groove, and a locking block (404) is fixedly connected above the second connecting block (402); one end of a screw (405) is fixedly connected to the slider (403), and the other end of the screw (405) passes through the first connecting block (401) and is threadedly engaged with a nut (406).

2. The silicon carbide desulfurization nozzle with a pre-alignment structure according to claim 1, characterized in that, The inner side of the second mounting ring (5) is provided with a groove for accommodating the card block (404) at the position corresponding to the card block (404).

3. A silicon carbide desulfurization nozzle with a pre-alignment structure according to claim 1, characterized in that, A sealing assembly (7) is provided between the mating surfaces of the first mounting ring (2) and the second mounting ring (5).

4. A silicon carbide desulfurization nozzle with a pre-alignment structure according to claim 3, characterized in that, The sealing assembly (7) includes a metal spiral wound gasket (703) disposed on the mating surface of the second mounting ring (5).

5. A silicon carbide desulfurization nozzle with a pre-alignment structure according to claim 4, characterized in that, A composite sealing gasket (702) is tightly fitted to the radial inner side of the metal spiral wound gasket (703).

6. A silicon carbide desulfurization nozzle with a pre-alignment structure according to claim 5, characterized in that, A sealing ring (701) is fixed on the composite sealing gasket (702).

7. A silicon carbide desulfurization nozzle with a pre-alignment structure according to claim 4, characterized in that, The metal spiral wound pad (703) is attached to the inner wall of the second mounting ring (5).

8. A silicon carbide desulfurization nozzle with a pre-alignment structure according to claim 7, characterized in that, A sealing ring (704) is provided between the metal spiral wound pad (703) and the second mounting ring (5).

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