A meyers double chamber lime kiln lance with a ceramic lining in part

Abstract

The utility model provides a kind of Meilizi double-chamber lime kiln spray gun with local ceramic lining, it is related to Meilizi double-chamber lime kiln spray gun technical field, to solve the existing Meilizi double-chamber lime kiln coal powder spray gun L bend place easy to wear and perforate, the problem of unstable structure in actual production use of existing processing mode, including spray gun base body, ceramic lining is welded in the L bend inner wall of the spray gun base body, the outer wall of the ceramic lining is welded with stainless steel pipe, the L bend position of the spray gun base body is also welded with support, the both ends of the spray gun base body can be welded with different length seamless steel pipe according to different application scenarios with sleeve.

Description

Technical Field

[0001] This utility model relates to the field of Maeltz double-chamber lime kiln spray gun technology, and in particular to a Maeltz double-chamber lime kiln spray gun with a partial ceramic lining. Background Technology

[0002] The Maeltz double-chamber lime kiln calcines limestone through alternating double-chamber operation. The spray gun needs to inject high-temperature and high-pressure airflow and coal powder into the kiln chamber, which is subjected to high-temperature, high-pressure coal powder scouring and strong chemical corrosion for a long time.

[0003] Existing spray guns have an L-shaped structure, with the base material mostly made of 0Cr25Ni20 (310S). A backing is added to the outside of the L-bend, and the backing is filled with wear-resistant and high-temperature resistant materials, or a thick alloy steel plate is used directly as the backing to prevent coal powder from brushing through the base and causing direct leakage. This structure can extend the life of the spray gun to a certain extent. However, since the backing only provides local protection for the L-bend of the spray gun, and the construction quality of the filling material inside the backing also has a significant impact on the protection effect, coupled with the multi-directional and all-round erosion of coal powder, this type of spray gun with a backing performs very unstablely in actual production applications. How to extend the service life of the spray gun and improve the production efficiency of double-chamber lime kilns has become an urgent problem to be solved in the industry.

[0004] The existing Maeltz double-chamber lime kiln pulverized coal spray gun is prone to wear and perforation at the L-bend. Existing treatment methods have problems with structural instability at the L-bend during actual production. Therefore, it is particularly important to design a Maeltz double-chamber lime kiln spray gun with a partial ceramic lining to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to solve the problems of easy wear and perforation at the L-bend of the existing Maeltz double-chamber lime kiln pulverized coal spray gun, and the instability of the L-bend structure when the existing treatment method is used in actual production. The invention proposes a Maeltz double-chamber lime kiln spray gun with a ceramic lining in some parts.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a Maeltz double-chamber lime kiln spray gun with a partial ceramic lining, comprising a spray gun base, a self-propagating ceramic lining provided on the inner wall of the L-bend of the spray gun base, a stainless steel pipe welded to the outer wall of the ceramic lining, a bracket welded at the L-bend of the spray gun base, and seamless steel pipes of different lengths welded to both ends of the spray gun base according to different application scenarios.

[0007] Preferably, to adapt to different working scenarios, a backpack is welded between the support and the stainless steel tube, and a filler is provided between the backpack and the stainless steel tube.

[0008] Preferably, the filler is a high-temperature resistant and wear-resistant material.

[0009] Preferably, the spray gun substrate has its wall thickness reduced before welding the ceramic memory and is welded using reverse bevel argon arc welding.

[0010] Preferably, the ceramic liner is processed using a self-propagating method.

[0011] Preferably, the spray gun substrate is made of 0Cr25Ni20 (310S) material.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, by welding a ceramic liner to the inner wall of the L-bend of the spray gun base and then welding a stainless steel pipe to the outer wall of the ceramic liner, the wear resistance and structural stability of the L-bend are effectively enhanced. Compared with conventional treatment methods where the L-bend structure is unstable during actual production, the technical solution adopted by this utility model significantly improves the wear resistance of this area by welding a ceramic liner to the inner wall of the L-bend of the spray gun base. At the same time, the stainless steel pipe welded to the outer wall of the ceramic liner further enhances the structural stability, effectively preventing coal dust from eroding the L-bend from all directions, thereby greatly extending the service life of the spray gun. In addition, seamless steel pipes of different lengths can be welded to both ends of the spray gun base with sleeves according to different application scenarios. This design improves the adaptability and flexibility of the spray gun, enabling it to meet the needs of various working scenarios and solving the problems of easy wear and perforation at the L-bend of the existing Maeltz double-chamber lime kiln coal dust spray gun and the instability of the L-bend structure in actual production.

[0013] 2. In this invention, during use, the ceramic lining welded to the inner wall of the L-bend of the spray gun base and the stainless steel pipe welded to the outer wall, together with the backpack and its internal high-temperature and wear-resistant filler, form a robust and wear-resistant protective layer. This design not only significantly enhances the wear resistance of the L-bend but also effectively improves the overall stability of the structure. In practical applications, this structure can resist the all-around erosion of the L-bend by coal dust, thereby greatly extending the service life of the spray gun. Simultaneously, the addition of the backpack and stainless steel pipe further enhances the structural strength of the spray gun, enabling it to maintain stability and reliability even in harsh working environments. Furthermore, seamless steel pipes of different lengths can be welded to both ends of the spray gun base with sleeves according to different application scenarios. This design gives the spray gun greater adaptability and flexibility, meeting the needs of various complex working scenarios. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the Maeltz double-chamber lime kiln spray gun with a ceramic lining in part, along with a backpack, filler, and welded extended seamless steel pipe. Figure 2 for Figure 1 A cross-sectional view along the AA direction; Figure 3 This is a schematic diagram of the Maeltz double-chamber lime kiln spray gun with a ceramic lining in part, along with a backpack and filler material, and without welded extended seamless steel pipe. Figure 4 This is a schematic diagram of the welded and extended seamless steel pipe of the Maeltz double-chamber lime kiln spray gun with partial ceramic lining according to the present invention. Figure 5 for Figure 4 A cross-sectional view along the AA direction; Figure 6 This is a schematic diagram of the unwelded extended seamless steel pipe of the Maeltz double-chamber lime kiln spray gun with a ceramic lining in part. Legend: 1. Spray gun base; 2. Ceramic liner; 3. Stainless steel pipe; 4. Support; 5. Seamless steel pipe; 501. Sleeve; 6. Backpack; 601. Filler. Detailed Implementation

[0015] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0016] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0017] This utility model provides a Maeltz double-chamber lime kiln spray gun with a partial ceramic lining, including a spray gun base 1 made of 0Cr25Ni20 (310S) material. A self-propagating ceramic lining 2 is provided on the inner wall of the L-bend of the spray gun base 1. The ceramic lining 2 is processed using a self-propagating method. Before welding the ceramic lining, the wall thickness of the spray gun base 1 is reduced, and the welding is performed using reverse beveling argon arc welding. A stainless steel pipe 3 is welded to the outer wall of the ceramic lining 2. A bracket 4 is also welded at the L-bend of the spray gun base 1. The bracket 4 not only enhances the structural strength of the L-bend of the spray gun base 1 but also facilitates the installation and fixation of the spray gun in actual production, improving the convenience and stability of operation. Furthermore, the design of the bracket 4 considers the stress conditions under different working environments, ensuring that the spray gun maintains a stable working state under various conditions. Seamless steel pipes 5 of different lengths can be welded to both ends of the spray gun base 1 with sleeves 501 according to different application scenarios. In the actual production and processing of the Maeltz double-chamber lime kiln spray gun with partial ceramic lining 2, a certain length is gradually extended at both ends of the L-bend of the spray gun, and a ceramic lining 2 is added to the inner wall of the bend. The ceramic lining 2 is processed using a self-propagating method, resulting in a smooth, uniform thickness, and high strength. This method can solve the problem of all-round erosion of the L-bend by coal dust, thereby extending the service life of the spray gun. Since the bend with ceramic lining 2 still needs to be welded to the gun barrel, in order to ensure that the diameter of the bend with ceramic lining 2 is consistent with the straight section of the gun barrel, a certain thickness of the base material wall is reduced during the processing of ceramic lining 2. A reverse bevel argon arc welding is used during welding to increase the weld seam thickness. To enhance strength, a sleeve 501 is added to the weld joint for further reinforcement. This process ensures the spray gun's installation dimensions remain unchanged while significantly extending its service life, thereby reducing worker fatigue, improving safety and production efficiency, and lowering production costs. By welding a ceramic liner 2 to the inner wall of the L-bend of the spray gun base 1, and then welding a stainless steel pipe 3 to the outer wall of the ceramic liner 2, the wear resistance and structural stability of the L-bend are effectively enhanced. Compared to conventional methods where the L-bend structure is unstable during actual production, the technical solution adopted in this invention significantly improves the wear resistance of this area by welding a ceramic liner 2 to the inner wall of the L-bend of the spray gun base 1. Simultaneously, the stainless steel pipe 3 welded to the outer wall of the ceramic liner 2 further enhances structural stability, effectively preventing all-around erosion of the L-bend by coal dust, thus greatly extending the service life of the spray gun. Furthermore, seamless steel pipes 5 of different lengths can be welded to both ends of the spray gun base 1 with sleeves 501 according to different application scenarios. This design improves the adaptability and flexibility of the spray gun, enabling it to meet the needs of various working scenarios.

[0018] Example 1 like Figure 1-6 As shown, to adapt to different working scenarios, a backpack 6 is welded between the support 4 and the stainless steel tube 3. A filler 601, made of a high-temperature resistant and wear-resistant material, is provided between the backpack 6 and the stainless steel tube 3. The overall effect of Embodiment 1 is that, during use, the ceramic liner 2 welded to the inner wall of the L-bend of the spray gun base 1 and the stainless steel pipe 3 welded to the outer wall, together with the backpack 6 and its internal high-temperature and wear-resistant filler 601, form a robust and wear-resistant protective layer. This design not only significantly enhances the wear resistance at the L-bend but also effectively improves the overall stability of the structure. In practical applications, this structure can resist the all-around erosion of the L-bend by coal dust, thereby greatly extending the service life of the spray gun. At the same time, the addition of the backpack 6 and the stainless steel pipe 3 further enhances the structural strength of the spray gun, enabling it to maintain stability and reliability even in harsh working environments. In addition, seamless steel pipes 5 of different lengths can be welded to both ends of the spray gun base 1 with sleeves 501 according to different application scenarios. This design makes the spray gun more adaptable and flexible, and can meet the needs of various complex working scenarios.

[0019] Example 2 like Figure 1-6 As shown, to adapt to different working scenarios, the support 4 and the stainless steel tube 3 may not need to be welded together with the backpack 6 or have a filling material 601 structure. The overall effect of Embodiment 2 is that, during use, the ceramic liner 2 welded to the inner wall of the L-bend of the spray gun base 1 and the stainless steel pipe 3 welded to the outer wall form a highly wear-resistant protective layer. The ceramic liner 2 is processed using a self-propagating method, resulting in a smooth surface, uniform thickness, and high strength, effectively resisting the erosion and wear of coal dust at the L-bend. Simultaneously, the welding of the stainless steel pipe 3 further enhances the structural stability, preventing structural instability caused by wear. This design not only extends the service life of the spray gun but also improves the production efficiency of the double-chamber lime kiln. Furthermore, seamless steel pipes 5 of different lengths can be welded to both ends of the spray gun base 1 with sleeves 501 according to different application scenarios. This flexible design allows the spray gun to adapt to various complex working environments, further enhancing its practicality and economic value.

[0020] Working principle: The straight sections at both ends of the L-bend of the spray gun are extended by a certain length, and a ceramic liner is added to the inner wall of the bend. The ceramic liner is processed using a self-propagating method, resulting in a smooth, uniform thickness, and high strength. This method effectively prevents coal dust from eroding the L-bend from all directions, thus extending the service life of the spray gun. Since the bend with the ceramic liner needs to be welded to the gun barrel, the wall thickness of the base material must be reduced to ensure the diameter of the bend matches the straight section of the gun barrel. Welding is performed using reverse beveling argon arc welding. To increase weld strength, a sleeve is added at the weld joint for further reinforcement. This process ensures that the installation dimensions of the spray gun remain unchanged while significantly extending its service life, thereby reducing the labor intensity of workers, improving safety and production efficiency, and lowering production costs.

Claims

1. A Maeltz double-chamber lime kiln spray gun with a partial ceramic lining, comprising a spray gun base (1), characterized in that, A self-propagating ceramic liner (2) is provided on the inner wall of the L-bend of the spray gun base (1). A stainless steel pipe (3) is welded to the outer wall of the ceramic liner (2). A bracket (4) is also welded at the L-bend of the spray gun base (1). Seamless steel pipes (5) of different lengths can be welded to both ends of the spray gun base (1) according to different application scenarios by adding sleeves (501).

2. The Maeltz double-chamber lime kiln spray lance with a partially ceramic lining as described in claim 1, characterized in that, According to different work scenarios, the support (4) and the stainless steel pipe (3) are also welded with a backpack (6), and a filler (601) is provided between the backpack (6) and the stainless steel pipe (3).

3. The Maeltz double-chamber lime kiln spray lance with a partially ceramic lining as described in claim 2, characterized in that, The filler (601) is a high-temperature resistant and wear-resistant material.

4. The Maeltz double-chamber lime kiln spray lance with a partially ceramic lining as described in claim 1, characterized in that, The spray gun substrate (1) has its wall thickness reduced before welding the ceramic liner and is welded using reverse bevel argon arc welding.

5. The Maeltz double-chamber lime kiln spray lance with a partially ceramic lining as described in claim 1, characterized in that, The ceramic lining (2) is processed using a self-propagating method.

6. The Maeltz double-chamber lime kiln spray lance with a partially ceramic lining as described in claim 1, characterized in that, The spray gun base (1) is made of 0Cr25Ni20 (310S) material.

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