A novel regenerator structure for coke ovens

Abstract

This disclosure relates to a novel regenerator structure for a coke oven, comprising: a wall structure constructed with silica bricks above a predetermined height and clay bricks below the predetermined height, with a sliding layer at the predetermined height; and a small flue partition wall for dividing the small flue area or the entire regenerator into two parts. According to this disclosure, based on the material expansion rate, silica bricks can be used above the predetermined height, and clay bricks below the predetermined height, reducing deformation caused by material expansion, preventing the regenerator from tilting, and preventing the silica bricks in the small flue area from cracking due to temperature differences. Furthermore, it also prevents the gaps between bricks along the length of the regenerator masonry from widening, causing leakage within the regenerator, thereby reducing the possibility of regenerator damage and improving coke quality.

Description

Technical Field

[0001] This disclosure relates to the field of production process technology, and in particular to a novel regenerator structure for a coke oven. Background Technology

[0002] The function of a coke oven regenerator is to recover the sensible heat of high-temperature waste gas and preheat the air and gas used for heating the coke oven. Modern coke oven regenerators are located at the bottom of the coke oven and almost all adopt a horizontal regenerator structure. As coke ovens become increasingly larger, their overall height and length increase. Coke oven refractory bricks are typically silica refractory bricks, differing only in their silica content. Silica refractory bricks exhibit different expansion rates at different temperatures. The temperature range of the regenerator from bottom to top is 90℃-1300℃, with a temperature difference of tens of degrees Celsius between each layer of bricks. Based on the characteristics of silica refractory bricks, the expansion rate of silica bricks remains relatively stable above 800℃, while below 800℃, the expansion rate varies significantly with temperature.

[0003] In related technologies, the main wall and individual walls of the coke oven are constructed using the same material from top to bottom: silica bricks. The coke oven regenerator has a very large upward temperature gradient, resulting in a longitudinal expansion difference of tens of millimeters, causing the regenerator's front to be vertically inclined. The small flue of the regenerator is the most direct point of heat exchange; rapid cooling and heating of the silica bricks can cause them to crack and break. Therefore, clay lining bricks are used in the low-temperature small flue area to protect the silica bricks of the main wall and individual walls. Although the surface of the silica bricks does not contact the gas inside the small flue, its temperature is even lower, creating a greater temperature difference with the unprotected silica bricks above, resulting in a larger upward temperature gradient and a greater expansion difference within the regenerator.

[0004] The gaps between the bricks in the longitudinal section of the regenerator masonry widened, causing severe leakage within the regenerator. Leakage in the main wall allowed rising gas to enter the descending gas flow, causing the regenerator in the descending gas flow to ignite, increasing its temperature and damaging it. Simultaneously, the rising gas flow, due to leakage, reduced or eliminated the gas volume in the coke oven combustion chamber, resulting in low combustion chamber temperatures and immature coke. In single-wall leakage, when using mixed gas for heating, the gas and air burned in the regenerator, increasing its temperature and damaging it. Similarly, the rising gas flow lacked heating gas, leading to a decrease in temperature.

[0005] The gas pipe brick is located in the main wall, with a height of about two to three layers of the main wall. It is equivalent to a pin being inserted into two or three layers of the main wall. The displacement between the upper and lower layers is large. The displacement or damage of the gas pipe brick causes the gas passage to be not sealed properly, resulting in gas leakage.

[0006] After the regenerator is divided into sections with partition walls, both ends of the partition walls are inserted into the single walls and main walls of the regenerator, forming a rigid connection. The expansion difference between the single walls and the main walls drives the partition walls, which in turn drive the checker bricks. The checker bricks are dry-laid, resulting in low friction between the bricks. The entire checker brickwork is tilted, potentially causing it to collapse, generating shear force on the coke oven head. This increases the additional shear force on the partition walls and sealing walls at the oven head location, thus increasing the degree of damage to the regenerator masonry. Summary of the Invention

[0007] This disclosure proposes a novel regenerator structure for a coke oven, comprising: a wall structure and a small flue partition wall.

[0008] The wall structure is constructed with silica bricks above the preset height and with clay bricks below the preset height, and a sliding layer is provided at the preset height.

[0009] The small flue partition wall is used to divide the small flue area of ​​the heat storage chamber or the entire heat storage chamber into two parts.

[0010] In one possible implementation, the wall structure includes:

[0011] The main wall serves as a partition wall for opposing airflows, and a brick gas duct is installed within the main wall.

[0012] A single wall, used as a unidirectional airflow separation wall, is used to separate coal gas and air during the heating of lean coal gas in a reheating coke oven;

[0013] Partition walls are used to divide the heat storage chamber into multiple independent cavities along its length.

[0014] In one possible implementation, the main wall and the partition wall are independent of each other, and the gap between the main wall and the partition wall is filled with refractory fiber products.

[0015] In one possible implementation, the single wall and the partition wall are independent of each other, and the gap between the single wall and the partition wall is filled with refractory fiber products.

[0016] In one possible implementation, each layer of bricks in the main wall and the single wall adopts a socket structure.

[0017] In one possible implementation, the main wall is provided with bricks containing gas channels, which are funnel-shaped channels.

[0018] In one possible implementation, the heat storage chamber is constructed with multiple layers of checker bricks.

[0019] In one possible implementation, the checkerboard bricks comprise twelve-hole checkerboard bricks.

[0020] In one possible implementation, the preset height includes a height at which the heat storage chamber temperature is 800°C.

[0021] In one possible implementation, the sliding layer is filled with a lubricating medium.

[0022] According to embodiments of the present disclosure, the regenerator structure of a novel coke oven can be constructed using silica bricks above a preset height and clay bricks below the preset height, based on the material's expansion rate. This reduces deformation caused by material expansion, prevents the regenerator from tilting, and avoids the silica bricks in the small flue area from cracking due to temperature differences. Furthermore, it prevents the gaps between bricks along the length of the regenerator masonry from widening, thus preventing leakage and reducing the likelihood of regenerator damage, while improving coke quality. A sliding layer is installed at the preset height of the wall structure to reduce the tilting of the checker bricks caused by material expansion, creating shear force on the single walls and main walls, thereby reducing the likelihood of regenerator damage. Furthermore, the partition walls are independent of the main walls and single walls, reducing the impact of thermal expansion of the main walls and single walls on the partition walls and checker bricks. In addition, small flue partition walls are set in the small flue area, so the temperature of the divided heat storage chamber can be adjusted independently. The load-bearing checker bricks can also be eliminated, reducing costs. Moreover, twelve-hole checker bricks can be used, which can improve the heat exchange efficiency of the heat storage chamber, reduce the amount of masonry used, and save costs.

[0023] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Other features and aspects of this disclosure will become clearer from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with this disclosure and, together with the specification, serve to illustrate the technical solutions of this disclosure.

[0025] Figure 1 A schematic diagram of the regenerator structure of a novel coke oven according to an embodiment of the present disclosure is shown;

[0026] Figure 2 A schematic diagram illustrating the expansion rate according to an embodiment of the present disclosure is shown;

[0027] Figure 3 A schematic diagram of the regenerator structure of a novel coke oven according to an embodiment of the present disclosure is shown;

[0028] Figure 4 This diagram shows an elevation view of a heat storage chamber structure in the relevant technology;

[0029] Figure 5 A plan view of a heat storage chamber structure in the related art is shown;

[0030] Figure 6 A schematic diagram of a gas pipe brick in the related technology is shown;

[0031] Figure 7 A schematic diagram of a block brick with a gas passage according to an embodiment of the present disclosure is shown;

[0032] Figure 8 A plan view of a heat storage chamber structure according to an embodiment of the present disclosure is shown;

[0033] Figure 9 A schematic diagram of load-bearing checker bricks in related technologies is shown;

[0034] Figure 10 A schematic diagram of a ten-hole checker brick in the related technology is shown;

[0035] Figure 11 A schematic diagram of a twelve-hole checker brick according to an embodiment of the present disclosure is shown;

[0036] Attached diagram labels: 1. Single wall; 2. Main wall; 3. Small flue area; 3.1. Small flue lining brick; 4. Brick gas duct; 4.1. Gas pipe brick; 4.2. Block brick with gas passage; 5. Checkered brick; 5. Load-bearing checkered brick; 5.1. Ten-hole checkered brick; 5.2. Twelve-hole checkered brick; 5.3. Partition wall; 6. Sliding layer; 7. Small flue partition wall; 8. Detailed Implementation

[0037] Various exemplary embodiments, features, and aspects of this disclosure will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0038] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0039] In this document, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" in this document means any combination of at least two of any one or more elements. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0040] Furthermore, to better illustrate this disclosure, numerous specific details are set forth in the following detailed description. Those skilled in the art will understand that this disclosure can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art have not been described in detail in order to highlight the main points of this disclosure.

[0041] To address the problems in related technologies, this disclosure proposes a novel regenerator structure for coke ovens. Based on the material's expansion rate, silica bricks are used for construction above a predetermined height, while clay bricks are used below the predetermined height. This reduces deformation caused by material expansion, preventing the regenerator from tilting. It also prevents the silica bricks in the small flue area from cracking due to temperature differences. Furthermore, it prevents the gaps between bricks along the length of the regenerator masonry from widening, thus avoiding leakage and reducing the possibility of regenerator damage, thereby improving coke quality. Further, a sliding layer is installed at the predetermined height of the wall structure to reduce the tilting of the checker bricks caused by material expansion, creating shear force on the individual walls and main walls, thereby reducing the possibility of regenerator damage.

[0042] Figure 1 A schematic diagram of the regenerator structure of a novel coke oven according to an embodiment of the present disclosure is shown, as follows: Figure 1 As shown, the regenerator structure of the novel coke oven includes: a wall structure and a small flue partition wall.

[0043] The wall structure is constructed with silica bricks above the preset height and with clay bricks below the preset height, and a sliding layer 7 is provided at the preset height;

[0044] The small flue partition wall 8 is used to divide the small flue area of ​​the heat storage chamber or the entire heat storage chamber into two parts.

[0045] In some embodiments of this disclosure, the preset height may be determined based on the expansion rate of silica bricks and clay bricks.

[0046] Figure 2 A schematic diagram illustrating the expansion rate according to an embodiment of the present disclosure is shown, such as... Figure 2 As shown, the expansion rates of bricks made of three different materials are illustrated. In related technologies, semi-silica bricks, with an expansion rate lower than that of silica bricks, can be used as materials for masonry walls. However, although semi-silica bricks have a smaller expansion rate and produce less deformation when heated, their expansion rate is irregular, making it difficult to control the expansion deformation. Therefore, silica bricks and clay bricks can be used as materials for masonry walls.

[0047] In some embodiments of this disclosure, the expansion rate of silica bricks is relatively stable after the temperature reaches 800°C, and the preset height includes the height at which the heat storage chamber temperature reaches 800°C. Using silica bricks as the masonry material above the preset height and clay bricks as the masonry material below the preset height makes the deformation of the wall stable and controllable, reduces the stress generated by deformation, and reduces the possibility of wall damage and leakage.

[0048] In some embodiments of this disclosure, a sliding layer 7 may be provided at a preset height, and the sliding layer 7 is filled with a lubricating medium. This allows relative displacement between the brick layers above and below the preset height, reducing stress and preventing damage to the wall.

[0049] In some embodiments of this disclosure, the wall structure includes: a single wall 1, serving as a unidirectional airflow partition wall, used to separate gas and air during the heating of lean gas in a reheating coke oven; a main wall 2, serving as a non-unidirectional airflow partition wall, wherein a brick gas duct is provided within the main wall; and a partition wall 6, used to divide the heat storage chamber longitudinally into multiple independent cavities.

[0050] In some embodiments of this disclosure, each layer of bricks in the single wall 1 and the main wall 2 employs a socket structure to increase structural strength and sealing, such as... Figure 1 As shown, this is a concave socket structure.

[0051] Figure 3 A schematic diagram of the regenerator structure of a novel coke oven according to an embodiment of the present disclosure is shown, as follows: Figure 3 As shown, single wall 1 and main wall 2 adopt an upward-convex socket structure. The socket structure mainly serves to seal and enhance structural strength, resulting in strong sealing between the upper and lower brick layers, reducing the probability of leakage, enhancing structural strength, and ensuring the stability of large-scale coke ovens.

[0052] Figure 4 This diagram shows an elevation view of a heat storage chamber structure in the relevant technology. Figure 5 This shows a plan view of the heat storage chamber structure in the related technology. Figure 6 A schematic diagram of a gas pipe brick in the related technology is shown.

[0053] In related technologies, a gas pipe brick 4.1 for conveying gas is installed inside the main wall 2. In this example, the gas pipe brick has a cross-section of 120mm × 120mm and a height of 245-400mm, with a large height-to-width ratio and a 50mm diameter gas channel in the center. This type of gas pipe brick has weak structural strength, is difficult to manufacture, and has a low yield rate. When laid in a masonry structure... Figure 4 When the main wall 2 is shown, the gas pipe brick 4.1 is inserted between the three layers of bricks in the main wall 2, which is equivalent to a pin structure. The maximum expansion of the upper and lower three layers of bricks is tens of millimeters. The gas pipe brick 4.1 may be sheared or crushed by the vertical displacement.

[0054] Figure 7 A schematic diagram of a block brick with a gas passage according to an embodiment of the present disclosure is shown. Figure 8 A plan view of a heat storage chamber structure according to an embodiment of the present disclosure is shown.

[0055] like Figure 7 As shown, the main wall contains bricks 4.2 with gas channels, which are funnel-shaped. The gas channels can be assembled into... Figure 1 The gas duct 4 is a brick in the main wall. The bricks 4.2 with the gas duct have enlarged surrounding bricks and reduced height, for example, to the same height as other bricks in the main wall. This results in high structural strength, simple brick-making process, and high yield of the bricks 4.2 with the gas duct. The bricks 4.2 with the gas duct are laid on the same plane as the other bricks in the main wall 2, effectively solving the problem of damage to the bricks caused by expansion displacement differences between upper and lower layers. Furthermore, the flared gas duct effectively reduces the change in cross-sectional area of ​​the gas duct caused by displacement, ensuring smooth gas flow through the regenerator.

[0056] In related technologies, such as Figure 4 As shown, a small flue lining brick 3.1 is installed in the small flue area to increase structural strength. However, the material of the lower part of the heat storage chamber in this disclosure is clay brick, which has good resistance to rapid cooling and heating. Therefore, the small flue lining brick 3.1 is no longer needed. Thus, the small flue lining brick 3.1 can be eliminated, increasing the cross-sectional area of ​​the small flue area, reducing the amount of masonry, lowering the gas velocity, and reducing resistance.

[0057] In some embodiments of this disclosure, due to the increasing trend of coke ovens becoming larger, the width and height of the regenerator chamber increase, and the length of the checker bricks 5 inside the regenerator chamber increases, thus weakening the structure of the checker bricks 5 and increasing the vertical load. Therefore, this disclosure provides a small flue partition wall 8 in the small flue area, such as... Figure 1 As shown. The small flue partition wall 8 can be located alone within the small flue area 3, or it can extend through the entire height of the regenerator, dividing the single regenerator into two independent regenerators, which can be used to coordinate with the segmented heating of the coke oven for individual adjustment. After installing the small flue partition wall 8, the width of the regenerator is halved, therefore... Figure 4 The load-bearing checkerboard bricks in section 5.1 can be removed.

[0058] Figure 9 A schematic diagram of load-bearing checker bricks in related technologies is shown. Figure 10 A schematic diagram of a ten-hole checker brick in the related art is shown. Figure 11 A schematic diagram of a twelve-hole checker brick according to an embodiment of the present disclosure is shown.

[0059] In some embodiments of this disclosure, as described above, after setting the small flue partition wall 8, the following can be eliminated: Figure 9 The load-bearing checkerboard brick shown is 5.1.

[0060] In some embodiments of this disclosure, the heat storage chamber is constructed with multiple layers of checker bricks, including twelve-hole checker bricks. Compared to the ten-hole checker bricks (5.2) in related technologies, the twelve-hole checker bricks (5.3) have a larger heat storage area, which can improve the heat exchange efficiency of the heat storage chamber. For coke ovens of the same scale, with the total heat storage area remaining unchanged, using twelve-hole checker bricks (5.3) can reduce the amount of masonry used and save costs.

[0061] In some embodiments of this disclosure, as the coke oven becomes larger, the increased length of the regenerator chamber hinders airflow distribution and regulation. Therefore, the partition wall 6 described in this disclosure is used to divide the regenerator chamber lengthwise into multiple independent cavities. The partitioned regenerator chambers exhibit uniform airflow distribution, reduced resistance, and easier adjustment.

[0062] In related technologies, such as Figure 5 As shown, the partition wall 6 adopts a socket structure with the single wall 1 and the main wall 2 of the heat storage chamber, that is, the partition wall 6 and the single wall 1 and the main wall 2 of the heat storage chamber form a rigid connection. When the single wall 1 and the main wall 2 are heated and expanded, they will drive the partition wall 6, and in turn drive the grid bricks 5 in the heat storage chamber, causing the grid bricks 5 to tilt or even fall over, generating shear force on the wall and increasing the probability of damage to the heat storage chamber.

[0063] In some embodiments of this disclosure, such as Figure 8 As shown, the main wall 2 and the partition wall 6 are independent of each other, and the gap between the main wall 2 and the partition wall 6 is filled with refractory fiber products. The single wall 1 and the partition wall 6 are also independent of each other, and the gap between the single wall 1 and the partition wall 6 is filled with refractory fiber products.

[0064] In some embodiments of this disclosure, the partition wall 6 is independent of the main wall 2 and the single wall 1, and they are not related to each other. The thermal expansion of the main wall 2 and the single wall 1 will not affect the partition wall 6, thus not affecting the partition wall 6 and the internal grid bricks 5, reducing the probability of damage to the heat storage chamber. Furthermore, the gaps between the single wall 1 and the partition wall 6, as well as the gaps between the main wall 2 and the partition wall 6, are filled with refractory fiber products, which can improve the sealing performance and reduce the coefficient of friction, minimizing the impact on the partition wall 6.

[0065] According to embodiments of the present disclosure, the regenerator structure of a novel coke oven can be constructed using silica bricks above a preset height and clay bricks below the preset height, based on the material's expansion rate. This reduces deformation caused by material expansion, prevents the regenerator from tilting, and avoids the silica bricks in the small flue area from cracking due to temperature differences. Furthermore, it prevents the gaps between bricks along the length of the regenerator masonry from widening, thus preventing leakage and reducing the likelihood of regenerator damage, while improving coke quality. A sliding layer is installed at the preset height of the wall structure to reduce the tilting of the checker bricks caused by material expansion, creating shear force on the single walls and main walls, thereby reducing the likelihood of regenerator damage. Furthermore, the partition walls are independent of the main walls and single walls, reducing the impact of thermal expansion of the main walls and single walls on the partition walls and checker bricks. In addition, small flue partition walls are set in the small flue area, so the temperature of the divided heat storage chamber can be adjusted independently. The load-bearing checker bricks can also be eliminated, reducing costs. Moreover, twelve-hole checker bricks can be used, which can improve the heat exchange efficiency of the heat storage chamber, reduce the amount of masonry used, and save costs.

[0066] It is understood that the embodiments mentioned above in this disclosure can be combined with each other to form combined embodiments without violating the principle and logic. Due to space limitations, this disclosure will not elaborate further. Those skilled in the art will understand that in the above methods of specific implementation, the specific execution order of each step should be determined by its function and possible internal logic.

[0067] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used in this disclosure is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable other those skilled in the art to understand the embodiments disclosed herein.

Claims

1. A novel regenerator structure for a coke oven, characterized in that, Includes: wall structure and small flue partition wall, The wall structure is constructed with silica bricks above the preset height and with clay bricks below the preset height. A sliding layer is provided at the preset height, which is the height at which the heat storage chamber temperature is 800℃. The small flue partition wall is used to divide the small flue area of ​​the heat storage chamber or the entire heat storage chamber into two parts, and the small flue lining bricks in the small flue area are removed. The heat storage chamber is constructed with multiple layers of checker bricks, and the load-bearing checker bricks are omitted from the multiple layers of checker bricks. The wall structure includes a main wall, which serves as a diverting wall for airflow. The main wall contains bricks with gas channels, which together form a brick gas duct. The height of the bricks with gas channels is reduced so that the height of each layer is the same as the height of the other bricks in the main wall. The bricks with gas channels are laid on the same plane as the other bricks in the main wall. The wall structure also includes: A single wall, used as a unidirectional airflow separation wall, is used to separate coal gas and air during the heating of lean coal gas in a reheating coke oven; Partition walls are used to divide the heat storage chamber into multiple independent cavities along its length.

2. The regenerator structure of the novel coke oven according to claim 1, characterized in that, The main wall and the partition wall are independent of each other, and the gap between the main wall and the partition wall is filled with refractory fiber products.

3. The regenerator structure of the novel coke oven according to claim 1, characterized in that, The single wall and the partition wall are independent of each other, and the gap between the single wall and the partition wall is filled with refractory fiber products.

4. The regenerator structure of the novel coke oven according to claim 1, characterized in that, The main wall and the single wall each use a socket structure for each layer of bricks.

5. The regenerator structure of the novel coke oven according to claim 1, characterized in that, The gas passage is a funnel-shaped passage.

6. The regenerator structure of the novel coke oven according to claim 1, characterized in that, The checkerboard bricks include twelve-hole checkerboard bricks.

7. The regenerator structure of the novel coke oven according to claim 1, characterized in that, The sliding layer is filled with a lubricating medium.

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