Coke oven furnace end local repair furnace top reinforcing device and use method thereof
By integrating a pressure sensor into the coke oven head local repair and top reinforcement device, real-time monitoring and uniform control of the force on the suspension rod are achieved, solving the problem of deformation and damage of the coke oven head under high temperature environment, and improving repair efficiency and airtightness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- MCC5 GROUP SHANGHAI CORPORATION LIMITED
- Filing Date
- 2025-12-18
- Publication Date
- 2026-04-24
AI Technical Summary
The coke oven head is prone to deformation and damage under high temperature, high pressure and chemical corrosion. Existing repair methods are time-consuming and labor-intensive and it is difficult to accurately control the stress on the oven top. Sensors are unreliable at high temperatures, and there is a lack of effective local reinforcement and monitoring methods.
A device for local repair and reinforcement of the furnace top of a coke oven is designed. A pressure sensor is integrated into the hanging system. Through components such as crossbeams, hangers, support plates, and nuts, the device enables real-time monitoring and uniform control of the force on the hangers, ensuring that the furnace top masonry is subjected to uniform stress during the heating process.
It improved the precision and safety of reinforcement, reduced the risk of settlement and deformation, enhanced the airtightness of the furnace body, shortened the construction period, and reduced environmental hazards and energy consumption.
Smart Images
Figure CN121914752A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of coking oven components, specifically to a coking oven head partial repair and top reinforcement device and its usage method. Background Technology
[0002] As the core equipment in coking production, the coke oven is prone to deformation, damage, and smoke / fire problems in the furnace head area (usually referring to the area of flues 1-4 on the outer edge of the machine side and coke side) under long-term high temperature, high pressure, and chemical corrosion. This leads to decreased furnace airtightness, failure to meet environmental standards, and increased energy consumption. Taking a 4A4B coke oven in a certain coking plant as an example, this coke oven has been in use for a long time, and the carbonization chamber wall in the furnace head area is severely damaged, requiring dismantling and repair. To reduce costs and construction time and achieve the lowest cost target, the part of the carbonization chamber wall above the top brick is usually retained. However, the furnace top is made of refractory masonry, which has the characteristics of high airtightness requirements, low tensile and shear strength, and high brittleness. When the lower supporting wall is removed, the top of the cantilevered flues 1-4 is prone to settlement or deformation, resulting in cracks in the internal masonry and decreased furnace airtightness.
[0003] Existing technologies for coke oven repair mainly include overall demolition and reconstruction, thermal spraying, or external support reinforcement. However, these methods often involve large-scale demolition, resulting in long construction periods, high costs, and difficulty in precisely controlling the uniform stress on the oven roof. Especially in partial repairs, the lack of a temporary reinforcement system for the remaining oven roof makes it impossible to monitor and adjust stress changes during thermal expansion in real time, which can easily lead to secondary damage or airtightness failure.
[0004] Furthermore, those skilled in the art generally believe that integrating pressure sensors for monitoring the stress on mechanical structures is not feasible in high-temperature environments (such as coke ovens heated to above 300°C), because high temperatures can lead to sensor material degradation, thermal shock damage, loss of measurement accuracy, and shortened lifespan.
[0005] Furthermore, existing pressure sensors are primarily used for gas pressure monitoring, not mechanical load monitoring. Their integration into temporary hardening systems is often seen as complex, costly, and impractical, potentially increasing the risk of failure without providing sufficient benefit. These biases lead technicians away from intelligent monitoring solutions and towards reliance on traditional mechanical adjustments or external supports, thus limiting repair efficiency and improvements in airtightness. Therefore, a safe, economical, and rapid hardening method is needed to ensure operational safety, maintain the integrity of the furnace roof's airtightness, and facilitate subsequent recycling. Summary of the Invention
[0006] In order to overcome the shortcomings of the existing technology and provide a coking oven component that is simple in structure, protects the masonry, and shortens the working time, this invention discloses a coking oven head partial repair and top reinforcement device and its usage method.
[0007] The present invention achieves its objective through the following technical solution: A coke oven head partial repair and furnace top reinforcement device includes furnace columns and furnace walls. The furnace columns are vertically fixed to the ground in sequence, and the furnace walls are fixed to the inner sidewalls of one furnace column on each side. At least three vertical fire channels are vertically arranged on the furnace walls, each channel penetrating from the bottom to the top surface of the furnace wall. The device further includes crossbeams, suspension rods, a base plate, a support plate, a pressure sensor, a pad, nuts, support beams, and support columns. The inner end of the crossbeam is fixed to the inner side wall of the furnace column and located above the furnace wall. Each crossbeam has a positioning hole directly opposite each vertical fire channel. The bottom end of the boom is fixed to the base plate. The outer side of the top of the boom is provided with external threads. The support plate is provided with a slot from the side to the center. The support plate is inserted into the bottom of the boom through the slot and is placed on the base plate. The top of the boom passes through the bottom of the vertical flue into the furnace wall and then out from the top of the vertical flue. It then passes through the positioning hole on the crossbeam directly opposite the vertical flue. The support plate is attached to the bottom of the furnace wall through the transfer of the base plate. The pad and pressure sensor are then placed on the boom in sequence, and then the nut is screwed in. The pressure sensor is attached to the top surface of the crossbeam through the tightening of the nut and the transfer of the pad. The support beam is supported between the inner end of the crossbeam and the top of the furnace wall and is fixed to the inner side wall of the furnace column by the side. The support column is supported between the outer end of the crossbeam and the top of the furnace wall.
[0008] The aforementioned coke oven head partial repair and furnace top reinforcement device is characterized by: The crossbeam consists of two channel steels and two connecting plates. The two channel steels are arranged at intervals with their respective waist plates, and the two connecting plates are respectively connected to the leg plates of the two channel steels on the same side. The pressure sensor is a perforated type with a range of 0–50 kN; H-beams are used for the support beams.
[0009] The method of using the aforementioned coke oven head partial repair and furnace top reinforcement device is characterized by the following steps being implemented sequentially: S1. Reinforcement: Fix the inner end of the crossbeam to the inner wall of the furnace column and position it above the furnace wall. Drill a positioning hole at each vertical flue directly opposite the crossbeam. Fix the bottom end of the boom to the base plate. Tap external threads on the outer side of the top of the boom. Drill a slot from the side to the center on the support plate. Insert the support plate into the bottom of the boom through the slot and place it on the base plate. The top of the boom is inserted into the furnace wall from the bottom of the flue and then out from the top of the flue. It then passes through the positioning hole on the crossbeam opposite the flue. The base plate is used to attach the support plate to the bottom of the furnace wall. A pad and pressure sensor are then sequentially fitted onto the boom, and a nut is screwed in. The tightening of the nut and the pad's position secure the pressure sensor to the top surface of the crossbeam. The support beam is placed between the inner end of the crossbeam and the top of the furnace wall, and the support column is placed between the outer end of the crossbeam and the top of the furnace wall. Adjust the nuts screwed on the top of the booms according to the pressure data measured by the pressure sensor to ensure that the force on each boom is consistent. This reinforces the top of the furnace wall and ensures that the hanging parts of the hanger are evenly stressed without gravity settlement or deformation. S2. Demolition: Demolish or repair the walls of the combustion chamber and carbonization chamber below the top of the furnace wall; S3. Heating: Close the furnace door on the furnace wall and then heat up. During the heating process, as the refractory material of the furnace wall expands, adjust the nut screwed on the top of the hanger rod in a timely manner according to the pressure data measured by the pressure sensor to ensure that the top of the furnace wall is subjected to uniform force. S4. Recovery: When the temperature inside the furnace wall rises to 300℃, the expansion of the refractory material of the furnace wall (12) is completed. Unscrew the nut from the top of the boom, remove the pad and pressure sensor in sequence, pull out the support plate, and pull the boom out of the vertical flue through the bottom plate. Recover the entire device for subsequent operations.
[0010] The method of using the coke oven head partial repair and furnace top reinforcement device is characterized in that: in step S1, the force on each suspension rod is 25kN±0.5kN.
[0011] This invention integrates pressure sensors into the suspension system, enabling real-time monitoring and uniform control of the force on each suspension rod (target 25kN). Through a perforated design, the sensor is positioned below the pad, facilitating data acquisition and nut adjustment, avoiding localized overload or settlement caused by blind operation. During the heating process (furnace temperature rises from room temperature to 300℃), the refractory material undergoes thermal expansion. The sensor monitors the force changes caused by this expansion (e.g., expansion force increases the tension on the suspension rod) and guides operators to tighten or loosen the nuts in a timely manner, ensuring uniform stress on the furnace roof masonry, preventing cracks or decreased airtightness, and improving the accuracy and safety of the reinforcement.
[0012] Compared with sensorless methods, this invention can reduce the risk of settlement and deformation by more than 50%, improve the airtightness of the furnace body, and reduce environmental hazards and energy consumption. At the same time, real-time data feedback shortens the adjustment time, the overall construction period can be reduced by 20% to 30%, and it is easy to record digitally, which facilitates subsequent optimization and standardized application.
[0013] The present invention has the following beneficial effects: 1. Simple structure, easy assembly, convenient manufacturing process, and easy to promote and apply; 2. It can effectively protect the masonry on the top of the coke oven, ensure the overall quality after repair, and save costs; 3. Retaining the reinforced furnace top can shorten construction time and reduce production interruption time. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 2 This is a left view of the crossbeam in this invention. Figure 3 This is a schematic diagram of the connection between the suspension rod and the base plate in this invention. Figure 4 This is a front view of the tray in this invention. Detailed Implementation
[0015] The present invention will be further illustrated below through specific embodiments. Example
[0016] A coke oven head partial repair and reinforcement device includes an oven column 11, an oven wall 12, a crossbeam 2, a hanging rod 3, a bottom plate 41, a support plate 42, a pressure sensor 5, a pad 6, a nut 7, a support beam 8, and a support column 9. Figures 1-4 As shown, the specific structure is: Each furnace column 11 is vertically fixed to the ground in sequence, and the two sides of the furnace wall 12 are respectively fixed to the inner side wall of a furnace column 11. At least three vertical fire channels 13 are vertically provided on the furnace wall 12, and each vertical fire channel 13 passes through the bottom surface to the top surface of the furnace wall 12. The inner end of the crossbeam 2 is fixed to the inner side wall of the furnace column 11 and is located above the furnace wall 12. The crossbeam 2 is provided with a positioning hole at each vertical fire channel 13. The bottom end of the rod 3 is fixed to the base plate 41. The outer side of the top of the rod 3 is provided with external threads. The support plate 42 is provided with a slot from the side to the center. The support plate 42 is inserted into the bottom of the rod 3 through the slot and is located on the base plate 41. The top of the boom 3 passes through the bottom of the vertical flue 13 into the furnace wall 12 and then out from the top of the vertical flue 13. It then passes through the positioning hole on the crossbeam 2 opposite the vertical flue 13. The support plate 42 is attached to the bottom of the furnace wall 12 through the transmission of the base plate 41. The pad 6 and pressure sensor 5 are sequentially put on the boom 3. Then the nut 7 is screwed in. The pressure sensor 5 is attached and fixed to the top surface of the crossbeam 2 through the tightening of the nut 7 and the transmission of the pad 6. The support beam 8 is supported between the inner end of the crossbeam 2 and the top of the furnace wall 12 and is fixed to the inner side wall of the furnace column 11 by the side. The support column 9 is supported between the outer end of the crossbeam 2 and the top of the furnace wall 12.
[0017] In this embodiment: Crossbeam 2 Figure 2 As shown: The crossbeam 2 includes two channel steels 21 and two connecting plates 22. The two channel steels 21 are arranged at intervals with their respective waist plates, and the two connecting plates 22 respectively connect the leg plates of the two channel steels 21 located on the same side. The hanger rod 3 is made of steel rod with a diameter of 20mm and a length of 2.5m, which is slightly higher than the height of the furnace wall 12. The top of the hanger rod 3 is provided with an external thread with a total length of 25mm to 30mm. The base plate 41 is made of steel plate with a radius of 50mm and a thickness of 8mm to 12mm, and the support plate 42 is made of steel plate with a length of 400mm × width of 320mm × thickness of 12mm. A slot with a length of 200mm × width of 30mm is drilled or milled on one side of the support plate 42. The connection relationship between the hanger 3 and the base plate 41 is as follows: Figure 3 As shown, tray 42 Figure 4 As shown; Pressure sensor 5 is a perforated type with a range of 0–50 kN; H-beams are selected for support beam 8.
[0018] When using this embodiment, follow these steps in sequence: S1. Reinforcement: Fix the inner end of the crossbeam 2 to the inner side wall of the furnace column 11 and position it above the furnace wall 12. Drill a positioning hole at each vertical fire channel 13 directly opposite the crossbeam 2. The bottom end of the lifting rod 3 is fixed to the base plate 41. External threads are tapped on the outer surface of the top of the lifting rod 3. A slot from the side to the center is drilled in the support plate 42. The support plate 42 is inserted into the bottom of the lifting rod 3 through the slot and placed on the base plate 41. The top of the lifting rod 3 is inserted into the furnace wall 12 from the bottom of the vertical flue 13 and then out from the top of the vertical flue 13. It then passes through the positioning hole on the crossbeam 2 opposite the vertical flue 13. The support plate 42 is then attached to the bottom of the furnace wall 12 via the base plate 41. The pad 6 and pressure sensor 5 are then sequentially fitted onto the lifting rod 3. Finally, the nut 7 is screwed in. Through the tightening of the nut 7 and the transfer of the pad 6, the pressure sensor 5 is attached and fixed to the top surface of the crossbeam 2. The support beam 8 is supported between the inner end of the crossbeam 2 and the top of the furnace wall 12, and the support column 9 is supported between the outer end of the crossbeam 2 and the top of the furnace wall 12. Adjust the nut 7 screwed on the top of the lifting rod 3 according to the pressure data measured by pressure sensor 5 to ensure that the force on each lifting rod 3 is consistent. For a 6m coke oven, the force is controlled at 25kN±0.5kN. The force can be adjusted according to the size of the coke oven. This reinforces the top of the furnace wall 12 and ensures that the hanging part of the hanger 3 is evenly stressed without gravity settlement or deformation. S2. Demolition: Demolish or repair the carbonization chamber and combustion chamber walls below the top of furnace wall 12; S3. Heating: Close the furnace door on the furnace wall 12 and then heat up. During the heating process, as the refractory material of the furnace wall 12 expands, adjust the nut 7 screwed on the top of the hanger 3 in a timely manner according to the pressure data measured by the pressure sensor 5 to ensure that the top of the furnace wall 12 is subjected to uniform force. S4. Recovery: When the temperature inside the furnace wall 12 reaches 300℃, the expansion of the refractory material of the furnace wall 12 is complete. Unscrew the nut 7 from the top of the lifting rod 3, remove the pad 6 and pressure sensor 5 in sequence, pull out the support plate 42, and pull the lifting rod 3 out of the vertical flue 13 through the bottom plate 41. The entire device is recovered for subsequent operations.
Claims
1. A coke oven head partial repair and top reinforcement device, comprising furnace columns (11) and furnace walls (12), wherein each furnace column (11) is vertically fixed to the ground in sequence, and each side of the furnace wall (12) is fixed to the inner side wall of a furnace column (11), and at least three vertical fire channels (13) are vertically provided on the furnace wall (12), each vertical fire channel (13) penetrating from the bottom surface to the top surface of the furnace wall (12), characterized in that: It also includes a crossbeam (2), a hanger (3), a base plate (41), a support plate (42), a pressure sensor (5), a pad (6), a nut (7), a support beam (8), and a support column (9). The inner end of the crossbeam (2) is fixed on the inner side wall of the furnace column (11) and located above the furnace wall (12). The crossbeam (2) is provided with a positioning hole at each vertical fire channel (13). The bottom end of the rod (3) is fixed on the base plate (41). The outer side of the top of the rod (3) is provided with external threads. The support plate (42) is provided with a slot from the side to the center. The support plate (42) is inserted into the bottom of the rod (3) through the slot and is located on the base plate (41). The top of the boom (3) passes through the bottom of the vertical flue (13) into the furnace wall (12) and then out from the top of the vertical flue (13). It then passes through the positioning hole on the crossbeam (2) directly opposite the vertical flue (13). The support plate (42) is attached to the bottom of the furnace wall (12) through the transmission of the base plate (41). The pad (6) and pressure sensor (5) are sequentially put on the boom (3). Then the nut (7) is screwed in. The pressure sensor (5) is attached and fixed to the top surface of the crossbeam (2) through the tightening of the nut (7) and the transmission of the pad (6). The support beam (8) is supported between the inner end of the crossbeam (2) and the top of the furnace wall (12) and is fixed to the inner side wall of the furnace column (11) by the side. The support column (9) is supported between the outer end of the crossbeam (2) and the top of the furnace wall (12).
2. The coke oven head partial repair and top reinforcement device as described in claim 1, characterized in that: The crossbeam (2) includes two channel steels (21) and two connecting plates (22). The two channel steels (21) are arranged with their respective waist plates spaced apart. The two connecting plates (22) respectively connect the leg plates of the two channel steels (21) located on the same side. The pressure sensor (5) is a perforated type with a range of 0 to 50 kN; H-beams are selected for the support beam (8).
3. The method of using the coke oven head partial repair and furnace top reinforcement device as described in claim 1 or 2, characterized in that: Follow these steps in sequence: S1. Reinforcement: Fix the inner end of the crossbeam (2) to the inner side wall of the furnace column (11) and place it above the furnace wall (12). Drill a positioning hole at the crossbeam (2) directly opposite each vertical fire channel (13). The bottom end of the boom (3) is fixed to the base plate (41). External threads are tapped on the outer surface of the top of the boom (3). A slot from the side to the center is drilled in the support plate (42). The support plate (42) is inserted into the bottom of the boom (3) through the slot and placed on the base plate (41). The top of the boom (3) is inserted from the bottom of the flue (13) into the furnace wall (12) and then out from the top of the flue (13). It then passes through the positioning hole on the crossbeam (2) opposite the flue (13). The support plate (42) is attached to the bottom of the furnace wall (12) through the transfer of the base plate (41). The pad (6) and pressure sensor (5) are then inserted onto the boom (3). The nut (7) is then screwed in. The pressure sensor (5) is attached and fixed to the top surface of the crossbeam (2) through the tightening of the nut (7) and the transfer of the pad (6). The support beam (8) is supported between the inner end of the crossbeam (2) and the top of the furnace wall (12), and the support column (9) is supported between the outer end of the crossbeam (2) and the top of the furnace wall (12). Adjust the nut (7) screwed on the top of the boom (3) according to the pressure data measured by the pressure sensor (5) to make the force on each boom (3) consistent. This reinforces the top of the furnace wall (12) and ensures that the hanging part of the rod (3) is evenly stressed without gravity settlement or deformation. S2. Demolition: Demolish or repair the wall surface below the top of the furnace wall (12); S3. Heating: Close the furnace door on the furnace wall (12) and then heat up. During the heating process, as the refractory material of the furnace wall (12) expands, adjust the nut (7) screwed on the top of the hanger (3) in time according to the pressure data measured by the pressure sensor (5) to ensure that the top of the furnace wall (12) is subjected to uniform force. S4. Recovery: When the temperature inside the furnace wall (12) rises to 300℃, the expansion of the refractory material of the furnace wall (12) is completed. Unscrew the nut (7) from the top of the boom (3), remove the pad (6) and pressure sensor (5) in sequence, pull out the tray (42), and pull the boom (3) out of the vertical flue (13) through the bottom plate (41). The entire device is recovered for subsequent operations.
4. The method of using the coke oven head partial repair and furnace top reinforcement device as described in claim 3, characterized in that: In step S1, the force on each rod (3) is 25kN±0.5kN.