Reducing type gas pipe brick structure

Abstract

The invention relates to the technical field of coke oven regenerative chambers, in particular to a variable-diameter gas pipe brick structure. The brick is built in a main wall of the coke oven regenerative chamber and comprises an upper pipe brick and a lower pipe brick which are built in the height direction; the inner diameter of the upper tubular brick is smaller than that of the lower tubular brick, and a reducing channel in smooth transition is formed at the joint of the inner walls of the upper tubular brick and the lower tubular brick; the transverse brick joints of the upper pipe bricks and the transverse brick joints of the main wall bricks are arranged in a staggered mode, and the transverse brick joints of the lower pipe bricks and the transverse brick joints of the main wall bricks are arranged in a staggered mode. And the gas blowby is fundamentally prevented from the structure. When auxiliary grouting operation is carried out, a grout spraying tool is easier to enter and operate due to the larger pipe diameter, grout can cover the inner wall more evenly, and the grouting operation efficiency and the final plugging effect are greatly improved. Energy is saved, and coking heat consumption of the coke oven is reduced; the service life of the furnace body can be prolonged, and the maintenance and operation cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of coke oven regenerator technology, specifically a variable diameter gas pipe brick structure. Background Technology

[0002] Modern coke ovens include single-heat coke ovens that burn only rich gas and reheat coke ovens that can burn both rich and lean gas. Regardless of the type, the rich gas passes through the main gas pipe, branch gas pipes, and various valves before finally entering the coke oven through brick gas ducts for combustion. These brick gas ducts are located in the regenerator and inclined sections of the coke oven. The rich gas needs to travel a long distance to reach the bottom of the combustion chamber and mix with air for combustion. During the flow of the rich gas, due to the gaps between the bricks in the gas ducts, gas leakage can occur due to the pressure difference between the inside and outside. Once the gas leaks, it not only wastes energy and increases the calorific value of coking, but can also damage the checker bricks in the regenerator, affecting the normal operation of the coke oven and reducing its service life.

[0003] Currently, the most common method for preventing gas leaks in brick-lined gas ducts is grouting. This involves spraying refractory mortar of a specific consistency into the coke oven after the cold-laid walls have been installed. This method requires installation in the coke oven's underground basement, is labor-intensive, involves high ambient temperatures, and operates in harsh conditions. Furthermore, upward spraying is difficult. In practice, even after grouting, gas leaks still occur to varying degrees in the brick-lined gas ducts.

[0004] With increasingly stringent environmental protection and energy efficiency requirements, the gas leakage problem caused by the brick-and-coal gas duct structure itself has become a technical bottleneck restricting the efficient, clean, and long-life operation of coke ovens. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, this invention provides a variable-diameter gas pipe brick structure. Through the variable-diameter design of the upper and lower pipe bricks and the staggered joint construction, gas leakage is fundamentally prevented structurally.

[0006] To achieve the above objectives, the present invention employs the following technical solution: A variable-diameter gas pipe brick structure is constructed within the main wall of a coke oven regenerator, comprising upper and lower pipe bricks constructed in the vertical direction; the inner diameter of the upper pipe brick is smaller than that of the lower pipe brick, and a smooth transition variable-diameter channel is formed at the junction of their inner walls; the transverse brick joints of the upper pipe brick are staggered from the transverse brick joints of the main wall brick, and the transverse brick joints of the lower pipe brick are also staggered from the transverse brick joints of the main wall brick.

[0007] Furthermore, the horizontal brick joints of the upper pipe bricks are set at half the height of the main wall bricks; the horizontal brick joints of the lower pipe bricks are set at half the height of the main wall bricks.

[0008] Furthermore, the smoothly transitioning variable diameter channel is used to guide the insertion of a gas-rich branch pipe, the outer diameter of which is smaller than the inner diameter of the upper pipe brick.

[0009] Furthermore, the main wall bricks are made of silica bricks; the upper and lower pipe bricks are made of silica bricks or clay bricks.

[0010] Furthermore, the gas-rich branch pipe is a heat-resistant metal flexible hose.

[0011] Furthermore, the outer diameter of the gas-rich branch pipe is at least 2 mm smaller than the inner diameter of the upper pipe brick.

[0012] Furthermore, the insertion depth of the gas-rich branch pipe extends into the channel of the lower pipe brick, or is located in the channel of the upper pipe brick.

[0013] Furthermore, the present invention is applicable to top-loading coke ovens, tamping coke ovens, and top-loading-tamping dual-purpose coke ovens.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. Structural Leakage Prevention for Long-Term Sealing: This invention completely blocks traditional straight-through leakage paths by staggering the joints of the upper and lower pipe bricks from those of the main wall bricks, and by using a variable diameter design for the upper and lower pipe bricks. This masonry and structural form significantly improves sealing reliability even without additional measures, providing a fundamental solution to the problem of gas leakage.

[0015] 2. Strong sealing through insert pipes for energy saving, reduced consumption, and extended lifespan. This invention incorporates a heat-resistant metal branch pipe for rich coal gas within the variable-diameter channel, forming a tight fit with the pipe bricks and walls, creating a dynamic sealing barrier. This significantly reduces the leakage loss of rich coal gas, thereby directly reducing coking calorific value and saving energy. Simultaneously, it effectively prevents leaked coal gas from burning the checker bricks and masonry of the regenerator, significantly extending the overall service life of the coke oven and reducing operating costs associated with frequent maintenance.

[0016] 3. This invention increases the inner diameter of the lower pipe brick, creating a spacious operating and maintenance area. This makes routine inspections, cleaning, and troubleshooting more convenient. Simultaneously, when auxiliary grouting operations are required, the larger pipe diameter allows for easier access and operation of the grouting tools, and the grout can be more evenly distributed across the inner wall, greatly improving the efficiency of the grouting operation and the final sealing effect.

[0017] 4. High adaptability and wide application, reliable operation and low cost. This structural design is flexible in terms of tube brick material (silica brick or clay brick) and can adapt well to the thermal stress changes during coke oven operation. Its versatility allows it to be widely used in various furnace types such as top-loading and tamping furnaces, which not only improves the reliability and stability of coke oven operation, but also effectively reduces the overall cost over the entire life cycle due to its long service life, low maintenance and energy-saving characteristics. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Marked in the diagram: 1. Main wall bricks; 2. Upper pipe bricks; 3. Lower pipe bricks; 4. Gas-rich branch pipe. Detailed Implementation

[0020] The embodiments of the present invention are described in detail below. To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] In the description of this invention, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0024] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0025] Example: like Figure 1 As shown, the present invention provides a variable diameter gas pipe brick structure, which is built inside the main wall of the coke oven regenerator and is mainly composed of main wall bricks 1, upper pipe bricks 2, lower pipe bricks 3 and rich gas branch pipes 4.

[0026] The main wall brick 1 is a standard masonry unit for the main wall of the coke oven regenerator, and in this embodiment, it is preferably made of silica brick.

[0027] The upper pipe brick 2 and the lower pipe brick 3 are sequentially built into the main wall brick 1 along the height direction, together forming a complete brick gas channel. The inner diameter of the upper pipe brick 2 is designed to be smaller than that of the lower pipe brick 3, and the two are smoothly transitioned at the inner wall joint through a conical or arc-shaped surface, forming an integral variable-diameter channel. This variable-diameter channel helps reduce eddies and resistance during gas flow. The inner diameter of the upper pipe brick 2 is 100mm, and the inner diameter of the lower pipe brick 3 is 130mm, with a smooth transition between them through a 15° conical surface.

[0028] In this embodiment, the masonry method is key to achieving the purpose of this invention. During the masonry process, it is essential to ensure that the transverse brick joints (i.e., the joints between the upper and lower bricks) of the upper pipe brick 2 and the transverse brick joints of the lower pipe brick 3 are staggered from the transverse brick joints of the adjacent main wall brick 1. Preferably, the brick joints of these pipe bricks are located at half the height of the main wall brick 1. This fully staggered masonry method effectively avoids the formation of through leakage channels due to aligned brick joints, providing the first solid foundation for structurally preventing gas leakage.

[0029] In this embodiment, the rich gas branch pipe insertion tube 4 is a heat-resistant metal flexible tube, which is inserted upwards from the coke oven basement into the variable-diameter channel formed by the upper pipe brick 2 and the lower pipe brick 3. The insertion depth of the rich gas branch pipe insertion tube 4 can be flexibly adjusted according to the actual working conditions: its end can extend into the channel of the lower pipe brick 3, or it can remain only in the channel of the upper pipe brick 2. This height-adjustable design gives the structure excellent adaptability to working conditions, and can be optimized for different sealing requirements or the actual conditions of the brick gas duct, ensuring the best sealing effect under any working conditions. A heat-resistant alloy flexible tube with an outer diameter of 98mm is used as the rich gas branch pipe insertion tube 4 and inserted into the variable-diameter channel.

[0030] The outer diameter of the gas-rich branch pipe insertion tube 4 is slightly smaller than the inner diameter of the upper pipe brick 2, with a preferred gap of 2mm, which ensures smooth insertion and a tight fit with the inner wall of the upper pipe brick 2.

[0031] The working process and sealing principle of this invention are as follows: Rich coal gas is transported via the rich coal gas branch pipe 4. Because the outer wall of the branch pipe 4 fits tightly with the small inner diameter section of the upper pipe brick 2, a dynamic active sealing barrier is formed, confining the coal gas flow within the branch pipe and preventing it from directly contacting and penetrating the brick joints of the upper pipe brick 2. Even when the branch pipe 4 is not in use, the variable diameter structure and the fully staggered joint construction significantly increase the path resistance and complexity of coal gas leakage, effectively suppressing leakage. Furthermore, the increased inner diameter of the lower pipe brick 3 provides ample space for future inspection, maintenance, or necessary grouting operations, significantly improving maintainability.

[0032] Comparative example: The coke oven regenerator uses a traditional brick gas passage structure. The gas pipe bricks are designed with a uniform diameter, all with an inner diameter of 110mm, and the joints between the pipe bricks and the main wall bricks are partially aligned. The same rich gas pressure is used for operation.

[0033] Effect comparison: Simulated leakage tests were performed on the examples and comparative examples under the same test conditions.

[0034] Leakage rate: The gas leakage rate of the embodiment structure was reduced by approximately 95% compared to the comparative embodiment.

[0035] Maintainability: When performing simulated grouting maintenance on the structure of the embodiment, the operation time was shortened by about 40% compared to the comparison because the inner diameter of the lower pipe brick 3 was increased, the grouting tool had ample operating space.

[0036] Analysis conclusion: This invention achieves an extremely low leakage rate and significantly improves maintainability through the synergistic effect of staggered masonry and pipe insertion in variable diameter channels.

[0037] The above description is only a part of the specific embodiments of the present invention. The scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A variable-diameter gas pipe brick structure built in the main wall of a coke oven regenerator, characterized in that: it comprises upper pipe bricks (2) and lower pipe bricks (3) built in the height direction; the inner diameter of the upper pipe bricks (2) is smaller than that of the lower pipe bricks (3), and the inner walls of the two bricks form a smooth transition variable-diameter passage; the horizontal brick joints of the upper pipe bricks (2) are staggered with the horizontal brick joints of the main wall bricks (1), and the horizontal brick joints of the lower pipe bricks (3) are staggered with the horizontal brick joints of the main wall bricks (1).

2. The variable-diameter gas pipe brick structure according to claim 1, characterized in that: the horizontal brick joints of the upper pipe bricks (2) are arranged at the half height of the main wall bricks (1); and the horizontal brick joints of the lower pipe bricks (3) are arranged at the half height of the main wall bricks (1).

3. The variable-diameter gas pipe brick structure according to claim 1, characterized in that: the smooth transition variable-diameter passage is used for inserting a gas-rich branch pipe spigot (4), and the outer diameter of the gas-rich branch pipe spigot (4) is smaller than the inner diameter of the upper pipe bricks (2).

4. The variable-diameter gas pipe brick structure according to claim 1, characterized in that: the main wall bricks (1) are made of silica bricks; and the upper pipe bricks (2) and the lower pipe bricks (3) are made of silica bricks or clay bricks.

5. The variable-diameter gas pipe brick structure according to claim 1, characterized in that: the gas-rich branch pipe spigot (4) is a heat-resistant metal hose.

6. The variable-diameter gas pipe brick structure according to claim 1, characterized in that: the outer diameter of the gas-rich branch pipe spigot (4) is at least 2 mm smaller than the inner diameter of the upper pipe bricks (2).

7. The variable-diameter gas pipe brick structure according to claim 1, characterized in that: the insertion depth of the gas-rich branch pipe spigot (4) extends into the passage of the lower pipe bricks (3), or is located in the passage of the upper pipe bricks (2).

8. The variable-diameter gas pipe brick structure according to claim 1, characterized in that: it is suitable for top-charged coke ovens, stamp-charged coke ovens, and top-charged / stamp-charged dual-purpose coke ovens. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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