Anti-blow-by coke oven regenerative chamber structure

Abstract

The utility model relates to an anti-blow-by coke oven regenerative chamber structure, which is divided into a plurality of different temperature intervals from the lower part of a combustion chamber to the bottom of the regenerative chamber, and sequentially comprises a high-temperature area, a medium-temperature area, a low-temperature area and a low-temperature area from top to bottom, the gas pipeline airflow channels corresponding to all the temperature intervals are staggered, and a high-temperature-resistant metal hose is arranged in the gas pipe brick airflow channel corresponding to the same vertical flame path from top to bottom in a full-length mode; and sliding layers are arranged among the brickworks in different temperature intervals. According to the utility model, gas supply blowby caused by mortar joint tearing or gas pipe brick breakage due to displacement between the upper and lower layer gas pipe bricks in the main wall of the regenerative chamber of the coke oven caused by different expansion during the oven drying period or the residual expansion period of the coke oven can be prevented, and smooth and safe production of the large coke oven is ensured.

Description

Technical Field

[0001] This utility model relates to the field of coke oven construction technology, and in particular to a structure for preventing coke oven heat storage chamber leakage. Background Technology

[0002] As coke ovens become larger, their length and regenerator height also increase. A coke oven's regenerator typically consists of a main wall, single walls, partition walls, and checker bricks. For bottom-injection coke ovens, in addition to its primary function of gas heat exchange, the main wall also contains gas pipe brick airflow channels (formed by multiple layers of gas pipe bricks) to supply bottom-injected gas from the bottom of the coke oven into the combustion chamber. With the increase in the length of the coke oven, the number of vertical flues also increases. Multiple vertical flues are installed within the same combustion chamber, and gas is simultaneously supplied to multiple gas pipe brick airflow channels through horizontal pipes in the basement. The gas injected from the bottom burns simultaneously in multiple vertical flues. Due to the increased height of the regenerator, the number of gas pipe bricks corresponding to the bottom-injection gas pipe brick airflow channels for each vertical flue also increases.

[0003] Currently, the gas pipe bricks that make up the gas flow channel are mostly constructed layer by layer using a combination of brick grooves and brick tongues. However, due to the increased longitudinal dimensions of large coke ovens, the coke oven transitions from a cold to a hot state during the baking process. With a fixed material expansion rate, the expansion amount increases accordingly. Furthermore, the materials of the gas pipe bricks and the main wall refractory are different. This difference in material expansion rates leads to different expansion amounts between the gas pipe bricks and the main wall, causing gaps to appear between them due to tensile stress. This can result in leakage between the gas pipe bricks, or even, in severe cases, breakage under shear force. Broken gas pipe bricks are difficult to repair, and both leakage and breakage directly cause the corresponding vertical flue to lose its downward-spraying gas flow, becoming a dead hole. Summary of the Invention

[0004] This utility model provides a structure for preventing gas leakage in a coke oven regenerator. It can prevent displacement between the upper and lower layers of gas pipe bricks in the main wall of the coke oven regenerator due to different expansion during oven drying or residual expansion of the coke oven, which could lead to tearing of the ash joints or cracking of the gas pipe bricks and cause gas leakage, thus ensuring the smooth and safe production of large coke ovens.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A coke oven regenerator structure for preventing leakage is disclosed. The top of the regenerator is connected to the bottom of the combustion chamber via an inclined passage. The combustion chamber consists of multiple vertical flues, each equipped with a downward-injected gas inlet. The downward-injected gas inlet is connected to a horizontal gas pipe located in the basement below the regenerator via a gas pipe brick airflow channel. The gas pipe brick airflow channel is formed by constructing multiple layers of gas pipe bricks. The regenerator is divided into multiple temperature zones from the bottom of the combustion chamber to the bottom of the regenerator, including a high-temperature zone, a medium-temperature zone, a low-temperature zone, and a low-temperature zone from top to bottom. The gas pipe airflow channels corresponding to each temperature zone are staggered. A high-temperature resistant metal flexible hose is installed continuously from top to bottom within the gas pipe brick airflow channel corresponding to the same vertical flue. A sliding layer is provided between the masonry of different temperature zones.

[0007] The upper part of the heat storage chamber is divided into a low-temperature zone and a slightly low-temperature zone; the inclined section is divided into a medium-temperature zone; and the lower part of the combustion chamber is divided into a high-temperature zone.

[0008] The top and bottom surfaces of the gas pipe brick are both flat.

[0009] The main wall of the heat storage chamber is entirely constructed of gas pipe bricks.

[0010] The sliding layer consists of asphalt felt and a concrete layer between the asphalt felt and the gas pipe brick.

[0011] The high-temperature resistant metal hose is equipped with expansion joints at the joints of the gas pipe brick airflow channels in each section.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1) The conventional method of connecting brick grooves and tongues in gas pipe bricks has been changed to prevent the gas pipe bricks from cracking due to shear force between the upper and lower layers of gas pipe bricks during the expansion process.

[0014] 2) The volume of the gas pipe bricks was increased, and the silica refractory bricks between the gas pipe bricks in the main wall of the heat storage chamber were eliminated. The two gas pipe bricks were arranged adjacent to each other, that is, the main wall of the heat storage chamber was entirely constructed of gas pipe bricks, so that the expansion of the main wall in the same temperature range remained consistent.

[0015] 3) A high-temperature resistant metal hose is added inside the gas pipe brick. When the gas flow channels of the upper and lower layers of gas pipe bricks are built, the high-temperature resistant metal hose is inserted into the holes of the gas pipe bricks in advance and connected. An expansion sliding zone is set in advance at the joint surface of the upper and lower layers of gas pipe bricks in different temperature ranges. During expansion, the gas flow channels of the upper and lower layers of gas pipe bricks are kept unobstructed by the high-temperature resistant metal hose. After thermal expansion, the gas flow channels of the gas pipelines corresponding to each temperature range are vertically aligned and connected, which fundamentally solves the problem of gas leakage in the gas-injected coke oven. Attached Figure Description

[0016] Figure 1 This is a schematic diagram illustrating the division of different temperature zones in the high-temperature zone and low-temperature zone of the coke oven described in this utility model.

[0017] Figure 2 This is a schematic diagram showing the connection between the upper gas pipe brick and the lower gas pipe brick described in this utility model.

[0018] In the diagram: 1. Regenerator 2. Inclined section 3. Combustion chamber 4. Gas pipe brick 5. Gas pipe brick airflow channel 6. Lower gas pipe brick 7. Upper gas pipe brick 8. High-temperature resistant metal hose 9. Sliding layer I. High-temperature zone II. Medium-temperature zone III. Low-temperature zone IV. Low-temperature zone Detailed Implementation

[0019] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0020] like Figure 1 , Figure 2 As shown, the present invention discloses a coke oven regenerator structure for preventing leakage. The top of the coke oven regenerator 1 is connected to the bottom of the combustion chamber 3 via an inclined section 2. The combustion chamber 3 consists of multiple vertical flues, each of which is equipped with a downward-spraying gas inlet. The downward-spraying gas inlet is connected to a horizontal gas pipe in the basement located below the regenerator 1 via a gas pipe brick airflow channel 5. The gas pipe brick airflow channel 5 is formed by constructing multiple layers of gas pipe bricks 4. The regenerator 1 is divided into multiple different temperature zones from the bottom of the combustion chamber 3 to the bottom of the regenerator 1, which are, from top to bottom, a high-temperature zone I, a medium-temperature zone II, a low-temperature zone III, and a low-temperature zone IV. The gas pipe airflow channels 5 corresponding to each temperature zone are staggered. A high-temperature resistant metal flexible hose 8 is installed from top to bottom in the gas pipe brick airflow channel 5 corresponding to the same vertical flue. A sliding layer 9 is provided between the masonry of different temperature zones.

[0021] The upper part of the heat storage chamber 1 is divided into a low-temperature zone IV and a slightly low-temperature zone III; the inclined zone 2 is divided into a medium-temperature zone II; and the lower part of the combustion chamber 3 is divided into a high-temperature zone I.

[0022] The top and bottom surfaces of the gas pipe brick 4 are both flat.

[0023] The main wall of the heat storage chamber 1 is entirely constructed of gas pipe bricks 5.

[0024] The sliding layer 9 consists of asphalt felt and a concrete layer located between the asphalt felt and the gas pipe brick 4.

[0025] The high-temperature resistant metal hose 8 is equipped with expansion joints at the joints of the gas pipe brick airflow channels 5 in each section.

[0026] The construction method of the anti-leakage coke oven regenerator structure described in this utility model is as follows:

[0027] 1) Based on the temperature during normal coke oven production, and combined with the thermal expansion curve of the gas pipe brick refractory material that makes up the main wall of the regenerator, the coke oven from the lower part of combustion chamber 3 to the bottom of regenerator 1 is divided into high temperature zone I, medium temperature zone II, low temperature zone III and low temperature zone IV.

[0028] 2) Based on the temperature of the area where the gas pipe brick 4 is located, and combined with the refractory expansion rate of the gas pipe brick 4, calculate the thermal expansion displacement of the gas pipe brick 4 during the process of the coke oven changing from a cold state to a hot state.

[0029] 3) When building the coke oven, the gas pipe bricks 4 in each temperature zone are vertically aligned to form a through gas pipe brick airflow channel 5; the gas pipe brick airflow channels 5 of two adjacent temperature zones are staggered.

[0030] 4) When laying two layers of gas pipe bricks 4 in two adjacent temperature zones, first connect the high-temperature resistant metal hose in the airflow channel of the upper gas pipe brick to the high-temperature resistant metal hose in the airflow channel of the lower gas pipe brick; and set a layer of asphalt felt at the interface between the upper gas pipe brick 7 and the lower gas pipe brick 6, and apply mortar to one side of the gas pipe brick 4 that contacts the asphalt felt to form a sliding layer 9.

[0031] 5) During the coke oven baking process, the main wall moves from the center of the furnace to both sides of the coke oven under the action of thermal expansion. The gas pipeline airflow channels 5 of two adjacent temperature ranges slide relative to each other. The gas pipeline airflow channels 5 of each temperature range are kept unobstructed by high temperature resistant metal hoses 8. After the thermal expansion is completed, the gas pipeline airflow channels 5 of each temperature range are vertically aligned and connected.

[0032] The present invention describes a coke oven regenerator structure for preventing leakage. The coke oven consists of a regenerator 1, an inclined zone 2, and a combustion chamber 3 from bottom to top. The present invention divides the regenerator 1 into a low-temperature zone IV and a slightly low-temperature zone III according to the temperature distribution, divides the area where the inclined zone 2 is located into a medium-temperature zone II, and divides the lower part of the combustion chamber into a high-temperature zone I.

[0033] Several gas pipe bricks 4 are installed inside the main wall of the heat storage chamber 1. The multi-layer gas pipe bricks 4 form a gas pipe brick airflow channel 5 from the bottom plate of the coke oven upward. The upper outlet of the gas pipe brick airflow channel 5 is located at the bottom of the vertical flue of the combustion chamber 3. A gas pipe airflow channel 5 is provided for each vertical flue to provide gas fuel for combustion inside the vertical flue.

[0034] The upper and lower surfaces of each layer of gas pipe bricks 4, i.e., the connecting surfaces between the upper gas pipe brick 7 and the lower gas pipe brick 6, are smooth surfaces without brick grooves or tongues. Furthermore, this invention increases the external dimensions of the gas pipe bricks 4 without enlarging the radius of the gas pipe brick airflow channel 5, so that the main wall of the heat storage chamber 1 is entirely constructed of gas pipe bricks 4. This eliminates the need for the silica refractory bricks between the gas pipe bricks in the conventional main wall, thereby reducing the types of refractory materials used and lowering the expansion shear force caused by different expansion rates. This prevents gas leakage caused by cracking of the mortar joints between the gas pipe bricks 4 due to expansion shear force.

[0035] In the coke oven design phase, this invention divides the coke oven into zones based on temperature: high-temperature zone I, medium-temperature zone II, low-temperature zone III, and low-temperature zone IV. Within each temperature zone, the gas pipe brick airflow channels 5 are vertically connected, forming a vertical airflow channel. To reduce the impact of different expansion rates between adjacent layers of gas pipe bricks 4 in different temperature zones, the expansion difference between the upper and lower layers of gas pipe bricks 4 is calculated based on the expansion rate under different temperature conditions. This allows the gas pipe brick airflow channels 5 in the upper and lower temperature zones to be staggered, and a sliding layer 9 is added at the connection point.

[0036] This invention incorporates a high-temperature resistant metal hose 8 within the gas pipe brick airflow channel 5. During the construction of the gas pipe bricks 4, the high-temperature resistant metal hose 8 corresponding to the upper gas pipe brick airflow channel is pre-connected to the high-temperature resistant metal hose 8 in the lower gas pipe brick airflow channel. During the coke oven drying process, the gas pipe bricks 4 corresponding to the same gas pipe brick airflow channel 6 at different temperature ranges will slide relative to each other according to a preset expansion displacement, and the high-temperature resistant metal hose 8 will move accordingly, ensuring the unobstructed flow of gas pipe brick airflow channel 5. This design effectively prevents coke oven gas leakage caused by damage to the gas pipe bricks 4 due to expansion shear force, and prevents failure of the coke oven lower gas injection system.

[0037] A sliding layer 9 is provided at the joint surface of the upper and lower gas pipe bricks located in different temperature ranges. The sliding layer 9 mainly includes asphalt felt, and ash is applied to the side of it that contacts the gas pipe brick 4. The sliding layer 9 formed in this way enables the upper and lower gas pipe bricks 4 to slide smoothly relative to each other.

[0038] Based on the expansion curves of the gas pipe brick material in the main wall under different temperature conditions, the expansion and sliding range is designed in advance. During the construction of the coke oven body, the expansion movement is pre-calculated. During the oven drying process, the main wall as a whole expands from the center of the oven to both sides of the coke oven. The expansion movement of the refractory material in the high temperature zone I is the largest, followed by the expansion movement of the refractory material in the medium temperature zone II and the low temperature zone III, and the expansion movement of the refractory material in the low temperature zone IV is the smallest. After the expansion movement is completed, the staggered joints between the gas pipe brick airflow channels 5 in the four different temperature zones disappear, and the gas pipe brick airflow channels 5 in each temperature zone are interconnected, forming a vertical gas channel that runs from the bottom plate of the coke oven to the vertical flue of the combustion chamber.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A leakage-proof coke oven regenerator structure, the top of the regenerator of a coke oven is connected with the bottom of a combustion chamber through a sloping zone, the combustion chamber is composed of a plurality of vertical flues, each vertical flue is provided with a lower coal gas injection inlet, the lower coal gas injection inlet is connected with a cellar coal gas horizontal manifold arranged below the regenerator through a coal gas pipe brick gas flow passage formed after a plurality of coal gas pipe bricks are laid; characterized in that, The lower part of the combustion chamber to the bottom of the regenerator is divided into different temperature intervals, including high temperature zone, medium temperature zone, low temperature zone and low temperature zone from top to bottom; the gas pipe flow channels corresponding to each temperature interval are staggered; the high-temperature resistant metal hose is longitudinally arranged in the gas pipe flow channels corresponding to the same vertical flue from top to bottom; and sliding layers are arranged between the masonry of different temperature intervals.

2. A leakage-proof coke oven regenerator structure according to claim 1, wherein The upper part of the regenerator is divided into low temperature zone, and the upper part of the regenerator is divided into low temperature zone; the inclined channel is divided into medium temperature zone; and the lower part of the combustion chamber is divided into high temperature zone.

3. A leakage-proof coke oven regenerator structure according to claim 1, wherein The top surface and the bottom surface of the gas pipe brick are both flat.

4. A leakage-proof battery chamber structure for a coke oven according to claim 1, wherein The main wall of the regenerator is entirely built by the gas pipe brick.

5. A leakage-proof coke oven regenerator structure according to claim 1, wherein The sliding layer is composed of asphalt felt and a concrete layer arranged between the asphalt felt and the gas pipe brick.

6. A leakage-proof coke oven regenerator structure according to claim 1, wherein The high-temperature resistant metal hose is provided with expansion joints at the joints of each section of the gas pipe flow channel.

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