Novel gasifier cylinder lining structure

Abstract

The utility model discloses a novel gasifier cylinder lining structure, which relates to a masonry structure of a gasifier and comprises a gasifier cylinder section steel shell, a fiber compressible material layer, an aluminum oxide hollow ball brick insulating layer, a permanent castable backing layer and a high-chromium brick working layer. The fiber compressible material layer is fixedly adhered to the inner side of the gasification furnace cylinder section steel shell, the fiber compressible material layer is tightly attached to the periphery of the inner side of the gasification furnace cylinder section steel shell, and the aluminum oxide hollow ball brick heat preservation layer is fixedly built on the inner side of the fiber compressible material layer; high-temperature-resistant fiber compressible materials are adhered to the inner side of the aluminum oxide hollow ball brick insulating layer and the outer side of the high-chromium brick working layer; the permanent castable backing layer is located between the high-temperature-resistant fiber compressible material layer on the inner side of the gasification furnace aluminum oxide hollow ball brick heat preservation layer and the high-temperature-resistant fiber compressible material layer on the outer side of the high-chromium brick working layer. According to the utility model, the construction period is shortened, the construction cost is saved, and the quality and the service life of the gasification furnace barrel are improved.

Description

Technical Field

[0001] The utility model relates to a masonry structure of a gasifier, in particular to a novel lining structure of the cylinder body of a gasifier. Background Technique

[0002] The pressurized water-coal slurry gasifier is a key device for coal liquefaction technology. It uses coal as raw material, mixes with high-temperature steam and oxygen, and undergoes a series of chemical reactions to convert solid coal into gases such as CO, H2, and CH4, which are used as chemical raw materials for synthesizing ammonia and city gas.

[0003] The lining structure of the gasifier is usually divided into three parts: the conical bottom, the cylinder body, and the arch top. The design idea of the existing refractory structure of the gasifier cylinder body is as follows: from the inside to the outside, there are a high-chromium brick working layer, a low-chromium brick backing layer, an alumina hollow sphere brick insulation layer, and a fiber compressible material layer in sequence. Each masonry needs to be carried out according to the requirements of the drawing. First, a layer of fiber compressible material is smeared on the steel shell, then the insulation layer bricks are masoned, then the backing layer bricks are masoned, and finally the working layer bricks are masoned. This method has the following defects: 1. The masonry workload is large, which not only increases the refractory cost but also shortens the service efficiency of the gasifier; 2. Since the refractory layers of the cylinder body are relatively independent brick structures, the number of bricks required for masonry of different layers is different, and it is inevitable to have through joints or near-through joints. Although filled with fire clay, it is inevitable to reduce the erosion resistance of the furnace bricks; 3. During the masonry process, a gap needs to be reserved between adjacent layers to relieve the expansion of the refractory, but it is difficult to ensure the gap reserved manually, so the masonry quality cannot be guaranteed, affecting the use effect of the gasifier. Content of the Utility Model

[0004] The purpose of the utility model is to provide a novel lining structure of the cylinder body of a gasifier to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A new type of gasifier cylinder lining structure, the cylinder lining structure is located between the arch top structure and the cone bottom structure of the gasifier itself, and includes a steel shell of the gasifier cylinder section, a fiber compressible material layer, an alumina hollow sphere brick insulation layer, a permanent castable backing layer, and a high-chromium brick working layer; the steel shell of the gasifier cylinder section is cylindrical, the fiber compressible material layer is fixedly pasted on the inner side of the steel shell of the gasifier cylinder section, the fiber compressible material layer closely adheres to the four sides around the inner side of the steel shell of the gasifier cylinder section, and the alumina hollow sphere brick insulation layer is fixedly built on the inner side of the fiber compressible material layer; it is characterized in that: high-temperature resistant fiber compressible material layers are pasted on the inner side of the alumina hollow sphere brick insulation layer and the outer side of the high-chromium brick working layer, and the fiber compressible material layers closely adhere to the four sides around the inner side of the alumina hollow sphere brick insulation layer of the gasifier and the outer side of the high-chromium brick working layer respectively; the permanent castable backing layer is formed by casting castable, and it is located between the high-temperature resistant fiber compressible material layer on the inner side of the alumina hollow sphere brick insulation layer of the gasifier and the high-temperature resistant fiber compressible material layer on the outer side of the high-chromium brick working layer. The permanent castable backing layer is composed of multiple castable layers from top to bottom, and a male-female buckle structure is provided between each castable layer.

[0007] The high-temperature resistant fiber compressible material layer is a refractory fiber blanket layer with a thickness of 3 mm. Among the multiple castable layers contained in the permanent castable layer itself, the size of each castable layer is the same, and the inner side and the outer side of each castable layer are respectively closely attached to the inner side of the high-temperature resistant fiber compressible material layer on the inner side of the alumina hollow sphere brick insulation layer and the outer side of the high-temperature resistant fiber compressible material layer on the outer side of the high-chromium brick working layer.

[0008] The male-female buckle structure provided between the castable layers, its specific structure is a closed toroid cast on the inner side of the refractory fiber blanket layer on the inner side of the alumina hollow sphere brick insulation layer and the outer side of the refractory fiber blanket layer on the outer side of the high-chromium brick working layer of the gasifier cylinder lining structure itself in each castable layer. An annular groove is provided on the upper end face of the toroid, which is rotated with the intersection point of the basic plane where the upper end face of the toroid itself is located and the vertical axis of the toroid itself as the center of the circle. An annular protrusion is provided on the lower end face of the toroid, which is rotated with the intersection point of the basic plane where the lower end face of the toroid itself is located and the vertical axis of the toroid itself as the center of the circle; the annular protrusion on the lower end face of the toroid of the upper cast layer is inserted into the annular groove on the upper end face of the toroid of the lower cast layer; the vertical axis of the toroid itself is collinear with the vertical axis of the gasifier itself.

[0009] At the lower ends of the alumina hollow sphere brick insulation layer and the permanent castable backing layer of the gasifier cylinder structure itself, they respectively abut against the upper end faces of the working layer of high-chromium bricks and the toroidal body of the castable layer cast around the central axis of the gasifier between the refractory fiber blanket layer outside the working layer of high-chromium bricks and the steel shell of the gasifier cone section; among them, the annular protrusion on the lower end face of the permanent castable backing layer is inserted into the annular groove provided on the inner side of the upper end face of the toroidal body of the castable layer cast between the steel shells of the gasifier cone section; the lower ends of the working layer of high-chromium bricks and the refractory fiber blanket layer outside the working layer of high-chromium bricks of the gasifier cylinder structure itself are connected and fixed to the upper ends of the working layer of high-chromium bricks and the refractory fiber blanket layer outside the working layer of high-chromium bricks of the gasifier bottom structure.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] The backing layer of the gasifier is constructed by replacing with castable, greatly reducing the masonry workload, not only reducing the labor intensity of workers, but also shortening the construction period of the masonry repair of the gasifier cylinder.

[0012] 2. Since the castable layer is a closed toroidal structure with good overall effect, a closed area is formed between the working layer and the insulation layer, thus greatly reducing the possibility of through joints in the brick structure and greatly improving the erosion resistance of the gasifier cylinder.

[0013] 3. Solve the problem that it is difficult to ensure construction due to the reserved gaps in the brick structure, ensure the masonry quality, and improve the service life of the gasifier cylinder. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of a novel gasifier cylinder lining structure of the present utility model;

[0015] In the figure: 1 alumina hollow sphere brick insulation layer; 2 high-temperature resistant fiber compressible material layer; 3 steel shell of the gasifier cylinder section; 4 permanent castable backing layer; 5 working layer of high-chromium bricks; 6 fiber compressible material layer. Detailed Embodiments

[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0017] Please refer to the legend. In the embodiment of the present utility model, a novel gasifier cylinder lining structure is provided. The cylinder lining structure is located between the arch top structure and the cone bottom structure of the gasifier itself, and includes a steel shell 3 of the gasifier cylinder section, a fiber compressible material layer 6, an alumina hollow sphere brick insulation layer 1, a permanent castable backing layer 4, and a high-chromium brick working layer 5. The steel shell 3 of the gasifier cylinder section is cylindrical. The fiber compressible material layer 6 is fixedly pasted on the inner side of the steel shell 3 of the gasifier cylinder section, and the fiber compressible material layer 6 closely adheres to the periphery of the inner side of the steel shell 3 of the gasifier cylinder section. The alumina hollow sphere brick insulation layer 1 is fixedly built on the inner side of the fiber compressible material layer 6. It is characterized in that high-temperature resistant fiber compressible material layers 2 are pasted on the inner side of the alumina hollow sphere brick insulation layer 1 and the outer side of the high-chromium brick working layer 5 respectively, and the fiber compressible material layer 6 closely adheres to the periphery of the inner side of the alumina hollow sphere brick insulation layer 1 of the gasifier and the outer side of the high-chromium brick working layer 5 respectively. The permanent castable backing layer 4 is located between the high-temperature resistant fiber compressible material layer 2 on the inner side of the alumina hollow sphere brick insulation layer 1 of the gasifier and the high-temperature resistant fiber compressible material layer 2 on the outer side of the high-chromium brick working layer 5. The permanent castable backing layer 4 is composed of multiple castable layers from top to bottom, and a male-female buckle structure is provided between the castable layers.

[0018] Among them, the high-temperature resistant fiber compressible material layer 2 is a refractory fiber blanket layer with a thickness of 3 millimeters. Among the multiple castable layers contained in the permanent castable layer itself, the size of each castable layer is the same, and the inner side and the outer side of each castable layer are respectively in close contact with the inner side of the high-temperature resistant fiber compressible material layer 2 on the inner side of the alumina hollow sphere brick insulation layer 1 and the outer side of the high-temperature resistant fiber compressible material layer 2 on the outer side of the high-chromium brick working layer 5.

[0019] Among them, the male-female buckle structure provided between the castable layers, its specific structure in each castable layer is a closed circular ring body cast between the inner side of the refractory fiber blanket layer on the inner side of the alumina hollow sphere brick insulation layer 1 of the gasifier cylinder lining structure itself and the outer side of the refractory fiber blanket layer on the outer side of the high-chromium brick working layer 5. An annular groove is provided on the upper end surface of the circular ring body, which is rotationally arranged with the intersection point of the basic plane where the upper end surface of the circular ring body is located and the vertical central axis of the circular ring body as the center. An annular protrusion is provided on the lower end surface of the circular ring body, which is rotationally arranged with the intersection point of the basic plane where the lower end surface of the circular ring body is located and the vertical central axis of the circular ring body as the center. The annular protrusion on the lower end surface of the circular ring body of the upper castable layer is inserted into the annular groove on the upper end surface of the circular ring body of the lower castable layer. The vertical central axis of the circular ring body is collinear with the vertical central axis of the gasifier.

[0020] Among them, at the lower ends of the alumina hollow ball brick insulation layer 1 and the permanent castable backing layer 4 of the gasifier cylinder structure itself, they respectively abut against the upper end faces of the working layer 5 of the high-chromium brick in the gasifier cone bottom structure and the upper end face of the toroidal body of the castable layer cast around the central axis of the gasifier between the refractory fiber blanket layer outside the working layer 5 of the high-chromium brick and the steel shell of the gasifier cone section; among them, the annular protrusion on the lower end face of the permanent castable backing layer 4 is inserted into the annular groove provided on the inner side of the upper end face of the toroidal body of the castable layer itself cast between the steel shells of the gasifier cone section; the lower ends of the working layer 5 of the high-chromium brick and the refractory fiber blanket layer outside the working layer 5 of the high-chromium brick of the gasifier cylinder structure itself are connected and fixed to the upper ends of the working layer 5 of the high-chromium brick and the refractory fiber blanket layer outside the working layer 5 of the high-chromium brick in the gasifier cone bottom structure.

[0021] The working method of the present utility model is as follows: as shown in the reference legend; the lining structure of the gasifier cylinder from the outside to the inside is successively the steel shell 3 of the gasifier cylinder section, the fiber compressible material layer 6, the alumina hollow ball brick insulation layer 1, the permanent castable backing layer 4, and the working layer 5 of the high-chromium brick;

[0022] The permanent castable backing layer 4 is formed by casting the castable in layers. The lower end of the permanent castable backing layer 4 abuts against the inner side of the upper end face of the castable layer cast between the already laid high-chromium brick layers T1931 and T1932A in the gasifier cone bottom structure and the steel shell of the gasifier cone section, and the height between the inner side of the upper end face of this castable layer and the lower end of the permanent castable backing layer 4 of the cylinder lining structure of the gasifier is connected by a male-female buckle structure; then the bottom of the brick T1939A of the alumina hollow ball brick insulation layer 1 of the gasifier cylinder lining structure itself abuts against the outer side of the upper end face of the castable layer cast between the already laid high-chromium brick layers T1931 and T1932A in the gasifier cone bottom structure and the steel shell of the gasifier cone section; specifically, the method of forming the permanent castable backing layer 4 by casting the castable in layers is to pour the low-creep and low-expansion amorphous refractory castable layer by layer from bottom to top between the inner side of the alumina hollow ball brick insulation layer 1 of the gasifier cylinder structure and the inner side of the high-temperature resistant fiber compressible material layer 2 and the outer side of the high-temperature resistant fiber compressible material layer 2 outside the working layer 5 of the high-chromium brick. After each layer is poured, immediately set the annular groove of the male-female buckle structure on the upper end face of the poured layer with a mold before the castable solidifies, and then pour the next layer after the castable solidifies, and so on.

[0023] The specific beneficial effects of the present utility model are that the castable is used to replace the construction of the gasifier backing layer, greatly reducing the masonry workload, not only reducing the labor intensity of workers, but also shortening the construction period of the masonry repair of the gasifier cylinder; because the castable layer is a closed toroidal structure with good overall effect, a closed area is formed between the working layer and the insulation layer, thus greatly reducing the possibility of through joints in the brick structure and greatly improving the erosion resistance of the gasifier cylinder; it solves the problem that it is difficult to ensure construction due to the reserved gaps in the brick structure, ensures the masonry quality, and improves the service life of the gasifier cylinder.

[0024] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A novel gasifier barrel lining structure, which is located between the vault structure and the cone bottom structure of the gasifier itself, and includes a gasifier barrel section steel shell, a fiber compressible material layer, an alumina hollow ball brick insulation layer, a permanent castable backing layer, and a high chrome brick working layer; the gasifier barrel section steel shell is cylindrical, the fiber compressible material layer is fixedly pasted on the inner side of the gasifier barrel section steel shell, the fiber compressible material layer is tightly fitted around the inner side of the gasifier barrel section steel shell, and the alumina hollow ball brick insulation layer is fixedly built on the inner side of the fiber compressible material layer; the characteristics are: The inner side of the insulation layer of the alumina hollow ball brick and the outer side of the high chrome brick working layer are both pasted with high temperature resistant fiber compressible material layers, and the fiber compressible material layers are tightly fitted around the inner side of the insulation layer of the alumina hollow ball brick of the gasifier and the outer side of the high chrome brick working layer; the permanent castable backing layer is cast by casting, and is located between the high temperature resistant fiber compressible material layer on the inner side of the insulation layer of the alumina hollow ball brick of the gasifier and the high temperature resistant fiber compressible material layer on the outer side of the high chrome brick working layer. The permanent castable backing layer is composed of multiple castable layers from top to bottom, and a sub-fastener structure is provided between each castable layer.

2. According to the novel gasification furnace shell lining structure of claim 1, it is characterized by: The high-temperature resistant fiber compressible material layer is a refractory fiber blanket layer with a thickness of three millimeters. The permanent castable layer itself contains multiple castable layers, and each castable layer has the same size. The inner and outer sides of each castable layer are respectively tightly attached to the inner side of the high-temperature resistant fiber compressible material layer on the inner side of the alumina hollow ball brick insulation layer and the outer side of the high-temperature resistant fiber compressible material layer on the outer side of the high-chrome brick working layer.

3. According to the novel gasification furnace shell lining structure of claim 1, it is characterized by: A male and female buckle structure is provided between the castable layers. The specific structure of the male and female buckle structure includes each castable layer. Each castable layer is cast and formed into a closed annular body between the inner side of the refractory fiber blanket layer of the alumina hollow ball brick insulation layer and the outer side of the refractory fiber blanket layer of the high chrome brick working layer of the gasifier shell lining structure itself. An annular groove is provided on the upper end face of the annular body, which is rotated with the intersection of the basic plane where the upper end face of the annular body itself and the central axis of the annular body itself in the up-down direction as the center of the circle. An annular protrusion is provided on the lower end face of the annular body, which is rotated with the intersection of the basic plane where the lower end face of the annular body itself and the central axis of the annular body itself in the up-down direction as the center of the circle; the annular protrusion on the lower end face of the annular body of the castable layer itself located above is inserted into the annular groove on the upper end face of the annular body of the castable layer itself located below and is fixed; the central axis of the annular body itself in the up-down direction is collinear with the central axis of the gasifier itself in the up-down direction.

4. According to the novel gasification furnace shell lining structure of claim 1, it is characterized by: The lower ends of the alumina hollow ball brick insulation layer and the permanent castable backing layer of the gasifier barrel structure itself respectively abut against the upper end surface of the circular ring body of the castable layer casted around the central axis of the gasifier between the high-chrome brick working layer in the gasifier cone bottom structure, the refractory fiber blanket layer outside the high-chrome brick working layer and the steel shell of the gasifier cone section; wherein the annular protrusion on the lower end surface of the permanent castable backing layer is inserted into the annular groove provided on the inner end surface of the upper end of the circular ring body of the castable layer itself cast between the steel shells of the gasifier cone section; the lower ends of the high-chrome brick working layer and the refractory fiber blanket layer outside the high-chrome brick working layer of the gasifier barrel structure itself are connected and fixed to the upper ends of the high-chrome brick working layer and the refractory fiber blanket layer outside the high-chrome brick working layer in the gasifier cone bottom structure.

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