Cross-structure refractory brick for heat recovery coke oven gas collecting pipe bridge pipe
By using cross-structure refractory bricks and thermal expansion compensation brick components to connect the bridge pipe and the gas collecting pipe in the heat recovery coke oven, the mechanical stress and thermal stress problems caused by temperature differences and position changes are solved, extending the service life and ensuring the safe and stable operation of the coke oven.
Patent Information
- Application Number
- CN202421192795.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-05-28
AI Technical Summary
In the heat recovery coke oven, the bridge pipe and gas collecting pipe are prone to relative displacement due to temperature differences and position changes, resulting in mechanical and thermal stress, which in turn causes cracking and collapse of the pipe wall, shortening the service life and affecting the safe and stable operation of the coke oven.
Cross-structure refractory bricks are used to connect the bridge pipe and the gas collecting pipe, and the brick assembly and multi-layer thermal insulation structure are compensated by thermal expansion and contraction to eliminate mechanical and thermal stress and achieve flexible connection.
Effectively eliminate thermal and mechanical stress, extend the service life of the gas collecting pipe and bridge pipe, ensure the safe and stable operation of the coke oven, and improve the utilization efficiency of high-temperature gas flow thermal energy.
Smart Images
Figure CN222961364U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a clean type heat recovery coke oven, in particular to a connecting structure between a bridge pipe of the oven body of the clean type heat recovery coke oven and a gas collecting pipe for conveying raw coke oven gas. Background Art
[0002] The clean type heat recovery coke oven mainly comprises key parts such as a carbonization chamber, a combustion chamber and a gas collecting pipe. The combustion chamber is located at the bottom of the carbonization chamber. The high-temperature waste gas in the carbonization chamber and the combustion chamber is sent to the gas collecting pipe through the rising flue and the bridge pipe on the coke oven body, and finally the high-temperature waste gas is sent to a waste heat boiler to generate steam for power generation.
[0003] The bridge pipe of the heat recovery coke oven is a key component connecting the carbonization chamber and the gas collecting pipe. The high-temperature waste heat directly enters the gas collecting pipe through the bridge pipe, and its temperature can reach 1300°C - 1350°C, which is the part with the highest temperature in the whole heat recovery coke oven. Each carbonization chamber and combustion chamber arranged side by side convey high-temperature waste gas and raw coke oven gas to the coke oven gas collecting pipe through the corresponding coke oven bridge pipe, and the temperature of the waste gas conveyed by the coke oven gas collecting pipe is above 1000°C.
[0004] Since the gas collecting pipe is supported on the ground through the corresponding steel frames, while the bridge pipe is arranged on the top of the oven body. Although the gas collecting pipe and the bridge pipe are interconnected, they are not supported on the same body at the same time. Due to factors such as the temperature difference and the temperature fluctuation range of the conveyed gas, relative displacement will inevitably occur between the two, and the physical effect of the relative displacement will generate displacement stress on the walls of the bridge pipe and the gas collecting pipe. Whether it is the mechanical stress generated by the displacement or the thermal stress generated by the temperature change and fluctuation, they are all very harmful factors that cause the walls of the bridge pipe and the gas collecting pipe to crack and collapse, not only shortening the service life of the bridge pipe and the gas collecting pipe, but also directly affecting the safe and stable operation of the coke oven. Summary of the Utility Model
[0005] Aiming at the above problems existing in the prior art, the technical problem to be solved by the utility model is to provide a cross-shaped refractory brick for the gas collecting pipe bridge of a heat recovery coke oven, which can not only eliminate the mechanical stress generated by relative displacement, but also eliminate the thermal stress generated by temperature imbalance.
[0006] In order to solve the above technical problems, the cross-shaped structural refractory brick for the gas collecting pipe bridge of the heat recovery coke oven of the present utility model comprises a gas collecting pipe and a bridge pipe which are interconnected. The gas collecting pipe includes a gas collecting pipe outer shell, and from outside to inside of the gas collecting pipe outer shell are a gas collecting pipe heat preservation layer, a gas collecting pipe heat insulation layer, and a gas collecting pipe surface heat layer. The gas collecting pipe surface heat layer encloses a gas collecting pipe cavity. The bridge pipe includes a bridge pipe passage surrounded by a bridge pipe brick wall and a bridge pipe top brick. From inside to outside of the bridge pipe brick wall and the bridge pipe top brick are a bridge pipe heat insulation layer, a bridge pipe heat preservation layer, and a bridge pipe outer shell. The interface pipe wall of the bridge pipe is connected to the interface pipe wall of the gas collecting pipe through a thermal expansion compensation brick assembly. The thermal expansion compensation brick assembly includes two laterally sliding groove bricks arranged oppositely. The two ends of a lateral barrier brick respectively extend into the lateral sliding grooves of the corresponding laterally sliding groove bricks at the corresponding ends. The horizontal brick tenons of the laterally sliding groove bricks movably extend into the vertical sliding grooves of the corresponding vertical sliding groove bricks.
[0007] Preferably, the gas collecting pipe outer shell is made of carbon steel plate by rolling. The gas collecting pipe heat preservation layer is laid with ceramic fiber felt. The gas collecting pipe heat insulation layer is built with mullite heat insulation bricks. The gas collecting pipe surface heat layer is built with erosion-resistant mullite refractory bricks.
[0008] Preferably, the bridge pipe outer shell is made of carbon steel plate. The bridge pipe heat preservation layer is laid with ceramic fiber. The bridge pipe top brick is an erosion-resistant mullite refractory brick. The bridge pipe brick wall is built with erosion-resistant mullite refractory bricks.
[0009] Preferably, the bridge pipe brick wall and the bridge pipe top brick enclose a strip-shaped bridge pipe passage. The gas collecting pipe surface heat layer encloses a gas collecting pipe cavity with a circular pipe cross-section. A plurality of bridge pipe passages communicate with the gas collecting pipe cavity in parallel.
[0010] Preferably, both the vertical sliding groove bricks and the lateral sliding groove bricks are erosion-resistant mullite refractory bricks. The lateral barrier brick is a mullite heat insulation brick.
[0011] Preferably, the vertical sliding grooves on the vertical sliding groove bricks are perpendicular to the lateral sliding grooves on the lateral sliding groove bricks.
[0012] Preferably, both the vertical sliding grooves and the lateral sliding grooves are rectangular grooves.
[0013] Preferably, ceramic fiber is filled between the lateral sliding grooves and the lateral barrier brick. Ceramic fiber is filled between the vertical sliding grooves and the horizontal tenons.
[0014] In the above structure, since the bridge pipe wall is connected to the gas collector wall through the thermal expansion compensation brick assembly, the bridge pipe and the gas collector form a flexible connection. The lateral barrier bricks are movably inserted into the lateral sliding grooves of the two oppositely arranged lateral sliding groove bricks. This structure can not only ensure that the two oppositely arranged lateral sliding groove bricks can move relative to each other to eliminate the thermal stress caused by thermal expansion and contraction due to temperature changes and the mechanical stress caused by position changes, but also block the leakage of high-temperature gas along the brick joints. At the same time, the horizontal brick tenons of the horizontal sliding groove bricks also movably extend into the vertical sliding grooves of the corresponding vertical sliding groove bricks, enabling the horizontal sliding groove bricks and the vertical sliding groove bricks to generate vertical relative displacement to eliminate the thermal stress and mechanical stress caused by thermal expansion and contraction or the relative position change of the two pipes, thereby avoiding the damage of the thermal stress and mechanical stress to the gas collector and the bridge pipe and ensuring the safe and stable operation of the coke oven. Also, since the gas collector shell is sequentially provided with a gas collector insulation layer, a gas collector heat insulation layer, and a gas collector surface heat layer from outside to inside; the outside of the bridge pipe is sequentially provided with a bridge pipe heat insulation layer and a bridge pipe insulation layer from inside to outside. The multi-layer heat insulation and heat preservation structure effectively reduces the heat dissipation loss of the high-temperature gas heat energy in the gas collector, greatly reduces the surface temperature of the gas collector, not only ensures the full utilization of the high-temperature gas heat energy, but also extends the service life of the gas collector and the bridge pipe, and ensures the safe and reliable operation of the coke oven. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The following further describes the cross-shaped structural refractory brick for the gas collector bridge pipe of the heat recovery coke oven of the present invention in conjunction with the drawings and specific embodiments.
[0016] Figure 1 is a cross-sectional structural schematic diagram of a specific embodiment of the cross-shaped structural refractory brick for the gas collector bridge pipe of the heat recovery coke oven of the present invention;
[0017] Figure 2 is Figure 1 the schematic diagram of the A-A cross-sectional structure in
[0018] Figure 3 is Figure 1 the schematic diagram of the B-B cross-sectional structure in
[0019] Figure 4 is Figure 1 the schematic diagram of the cross-sectional structure of the thermal expansion compensation brick assembly in
[0020] Figure 5 is Figure 4 the schematic diagram of the C-C cross-sectional structure in
[0021] Figure 6 is Figure 4 the front view of the vertical sliding groove brick in
[0022] Figure 7 is Figure 6 the top view of
[0023] Figure 8 is Figure 4 Front view structure diagram of the horizontal chute brick in
[0024] Figure 9 is Figure 8 Left view of
[0025] Figure 10 is Figure 8 Schematic diagram of the D-D sectional structure of
[0026] In the figure, 1 - gas collecting pipe support; 2 - gas collecting pipe outer shell; 3 - gas collecting pipe insulation layer; 4 - gas collecting pipe heat insulation layer; 5 - gas collecting pipe surface heat layer; 6 - vertical chute brick; 7 - vertical chute filler; 8 - horizontal chute brick; 9 - horizontal barrier brick; 10 - horizontal chute filler; 11 - bridge pipe outer shell; 12 - bridge pipe insulation layer; 13 - bridge pipe heat insulation layer; 14 - bridge pipe top brick; 15 - bridge pipe brick wall; 16 - bridge pipe channel; 17 - horizontal brick tenon; 18 - horizontal chute; 19 - vertical chute. Specific implementation mode
[0027] Such as Figure 1 , Figure 2 and Figure 3 shown in the heat recovery coke oven gas collecting pipe bridge pipe with cross-structured refractory bricks, including a gas collecting pipe and a bridge pipe. The gas collecting pipe is supported on the gas collecting pipe support 1, and the gas collecting pipe support 1 is deeply embedded in the ground; the bridge pipe is arranged at the top of the coke oven body. Since a plurality of carbonization chambers and combustion chambers are arranged side by side on the coke oven body, each carbonization chamber and combustion chamber corresponds to a bridge pipe at its top. Therefore, a plurality of bridge pipes are connected to the gas collecting pipe in parallel.
[0028] The gas collecting pipe includes a gas collecting pipe outer shell 2 made of carbon steel plate rolled into a cylindrical shape. On the inner wall of the gas collecting pipe outer shell 2, a gas collecting pipe insulation layer 3, a gas collecting pipe heat insulation layer 4 and a gas collecting pipe surface heat layer 5 are laid in sequence from outside to inside; the gas collecting pipe insulation layer 3 is laid along the inner wall surface of the gas collecting pipe outer shell 2 by ceramic fiber felt, and the gas collecting pipe heat insulation layer 4 is built with mullite bricks with insertion tenons and mortises. The gas collecting pipe surface heat layer 5 is built on the inner side surface of the gas collecting pipe heat insulation layer 4, and the gas collecting pipe surface heat layer 5 is built with erosion-resistant mullite refractory bricks with insertion tenons and mortises; the gas collecting pipe surface heat layer 5 encloses a pipe cavity for transporting high-temperature gas flow. A pipeline interface is arranged at the position corresponding to the gas collecting pipe and the bridge pipe, so that each bridge pipe is connected to the gas collecting pipe.
[0029] The bridge pipe includes a bridge pipe passage 16 surrounded by a bridge pipe brick wall 15 and a bridge pipe top brick 14. The bridge pipe passage 16 is a strip-shaped passage. The lower end of the bridge pipe passage 16 leads to the carbonization chamber and the combustion chamber of the coke oven body, and the front end of the bridge pipe passage 16 leads to the lumen of the gas collecting pipe. The bridge pipe housing 11 is made of carbon steel plate bent and welded. The bridge pipe thermal insulation layer 12 is laid with ceramic fiber felt. The bridge pipe top block 14 is erosion-resistant mullite brick, and the bridge pipe brick wall 15 is built with erosion-resistant mullite brick.
[0030] A number of mutually adjacent thermal expansion compensation brick assemblies are arranged between the pipe wall at the bridge pipe interface and the pipe wall at the gas collecting pipe interface, that is, the pipe wall at the bridge pipe interface and the pipe wall at the gas collecting pipe interface are connected to each other through the thermal expansion compensation brick assemblies.
[0031] As Figure 4 、 Figure 5 shown in the thermal expansion compensation brick assembly, this thermal expansion compensation brick assembly includes two relatively arranged transverse chutes 8. The openings of the transverse chutes 18 on the two transverse chute bricks 8 are arranged relatively. A transverse barrier brick 9 is arranged in the opposite openings, that is, both ends of the transverse barrier brick 9 extend into the transverse chutes 18 of the corresponding end transverse chute bricks 8 respectively. On the other side of the transverse chute brick 8 opposite to the chute opening, there is a vertically arranged transverse brick tenon 17. The transverse brick tenon 17 is movably arranged in the vertical chute 19 of the vertical chute brick 6. One side of the vertical chute brick 6 is fixedly installed on the pipe wall of the gas collecting pipe, and the other side of the vertical chute brick 6 is fixedly installed on the pipe wall of the bridge pipe. There is a gap between the transverse barrier brick 9 and the transverse chute 18 of the transverse chute brick 8, and a transverse chute filler 10 is filled in this gap. There is also a gap between the vertical chute 19 of the vertical chute brick 6 and the transverse brick tenon 17, and a vertical chute filler 7 is filled in this gap.
[0032] The vertical chute brick 5 and the transverse chute brick 8 form a cross structure. The longitudinal directions of the vertical chute 19 and the transverse chute 18 are perpendicular to each other, so that the vertical chute brick 6 and the transverse chute brick 8 can form relative movements in both the vertical direction and the horizontal direction. Both the vertical chute brick 6 and the transverse chute brick 8 are made of erosion-resistant mullite refractory bricks, and the transverse barrier brick 9 is mullite heat-insulating brick. The vertical filler 7 and the transverse chute filler 10 in the vertical chute 19 and the transverse chute 18 are both ceramic fiber.
[0033] As Figure 6 and Figure 7 shown, a vertical chute 19 is provided on one side of the brick body of the vertical chute brick 6. The vertical chute 19 is a rectangular groove.
[0034] As Figure 8 、 Figure 9 and Figure 10As shown in the figure, on one side of the brick body of the horizontal sliding groove brick 8, there is a horizontal sliding groove 18 which is also a rectangular groove. On the other side of the brick body of the horizontal sliding groove brick 8, there is a horizontal brick tenon 17, and the horizontal brick tenon 17 is of the same height as the brick body. And the longitudinal direction of the horizontal brick tenon 17 is perpendicular to the groove longitudinal direction of the horizontal sliding groove 18.
[0035] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can understand and utilize the present invention well. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.
Claims
1. A cross-structured refractory brick for a heat recovery coke oven gas collecting pipe bridge pipe, comprising a gas collecting pipe and a bridge pipe interconnected with each other, characterized in that: The gas collecting pipe comprises a gas collecting pipe shell (2), wherein the gas collecting pipe shell (2) is provided with a gas collecting pipe heat preservation layer (3), a gas collecting pipe heat insulation layer (4) and a gas collecting pipe surface heat layer (5) in order from outside to inside, and the gas collecting pipe surface heat layer (5) surrounds a gas collecting pipe cavity; the bridge pipe comprises a bridge pipe channel (16) surrounded by a bridge pipe brick wall (15) and a bridge pipe top brick (14), wherein the bridge pipe heat insulation layer (13), a bridge pipe heat insulation layer (4) and a gas collecting pipe surface heat layer (5) are provided on the outside of the bridge pipe brick wall (15) and the bridge pipe top brick (14) in order from inside to outside The invention relates to a heat-resistant ...
2. The cross-structure refractory brick for heat recovery coke oven gas collecting pipe bridge according to claim 1, characterized in that: The gas collecting pipe shell (2) is formed by rolling carbon steel plates, and the gas collecting pipe insulation layer (3) is formed by laying ceramic fiber felt; the gas collecting pipe heat insulation layer (4) is formed by laying mullite heat insulation bricks, and the gas collecting pipe surface heat layer (5) is formed by laying erosion-resistant mullite refractory bricks.
3. The cross-structure refractory brick for heat recovery coke oven gas collecting pipe bridge according to claim 1, characterized in that: The bridge pipe shell (11) is made of carbon steel plate, the bridge pipe insulation layer (12) is made of ceramic fiber, the bridge pipe top brick (14) is corrosion-resistant mullite refractory brick, and the bridge pipe brick wall (15) is made of corrosion-resistant mullite refractory brick.
4. The cross-structure refractory brick for heat recovery coke oven gas collecting pipe bridge according to claim 1, characterized in that: The bridge pipe brick wall (15) and the bridge pipe top brick (14) form a strip-shaped bridge pipe channel (16); the gas collecting pipe surface heat layer (5) forms a gas collecting pipe cavity with a circular pipe cross section; and a plurality of bridge pipe channels (16) are connected to the gas collecting pipe cavity in the ground.
5. The cross-structure refractory brick for heat recovery coke oven gas collecting pipe bridge according to any one of claims 1 to 4, characterized in that: The vertical chute bricks (6) and the transverse chute bricks (8) are both erosion-resistant mullite refractory bricks, and the transverse barrier bricks (9) are mullite insulation bricks.
6. The cross-structure refractory brick for heat recovery coke oven gas collecting pipe bridge according to any one of claims 1 to 4, characterized in that: The vertical slide groove (19) on the vertical slide groove brick (6) and the transverse slide groove (18) on the transverse slide groove brick (8) are perpendicular to each other.
7. The cross-structure refractory brick for heat recovery coke oven gas collecting pipe bridge according to any one of claims 1 to 4, characterized in that: The vertical sliding groove (19) and the horizontal sliding groove (18) are both rectangular grooves.
8. The cross-structure refractory brick for the heat recovery coke oven gas collecting pipe bridge according to any one of claims 1 to 4, characterized in that: Ceramic fibers are filled between the transverse slide groove (18) and the transverse barrier brick (9); and ceramic fibers are filled between the vertical slide groove (19) and the transverse tenon (17).