A methanation reaction and gas transport layout structure with thermal displacement self-compensation function
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-30
- Publication Date
- 2026-08-14
AI Technical Summary
[0004]该布局结构面临严峻的热膨胀协调问题：冷态(停车状态)到热态(满负荷运行状态)时，甲烷化反应器、大三通、输气总管及废热锅炉均会产生显著的轴向热膨胀位移；因设备尺寸、温度分布及支撑约束差异，各部件膨胀量和膨胀方向(尤以管线轴向为甚)存在显著不一致性
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Figure CN224628946U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of chemical equipment technology, and in particular to a methanation reaction and gas delivery layout structure with thermal displacement self-compensation function. Background Technology
[0002] When using raw coal gas obtained from coal dry distillation or syngas obtained from coal gasification as feedstock for methanation to produce natural gas (or liquefied natural gas), high-temperature methanation is the core process step. With the increasing scale of plant capacity, limited by the size limit of a single methanation reactor, two methanation reactors in parallel are required to share the processing capacity. The high-temperature process gas (typically reaching 550℃~650℃) produced by these two methanation reactors needs to be collected and then fed through a main gas pipeline into a shared large waste heat boiler for heat recovery and cooling before entering subsequent process flows.
[0003] In this typical "two reactors and one waste heat boiler" layout, the process gas is usually collected using a large tee fitting (commonly known as a "large tee"). Specifically, the outlets (high temperature, large diameter) of the two methanation reactors are connected to a main gas pipeline through the large tee, which then leads to the waste heat boiler.
[0004] This layout structure faces a severe problem of thermal expansion coordination: when transitioning from a cold state (shutdown state) to a hot state (full-load operation state), the methanation reactor, the main three-way valve, the gas transmission main, and the waste heat boiler will all experience significant axial thermal expansion displacement; due to differences in equipment size, temperature distribution, and support constraints, there are significant inconsistencies in the amount and direction of expansion of each component (especially in the axial direction of the pipeline).
[0005] To address this issue, the traditional approach involves installing a horizontal tee directly beneath the outlets of two vertically arranged methanation reactors. The two inlets at the top of the tee connect directly to the outlets of the two reactors, while the outlet connects to a main gas pipeline, which in turn connects to a waste heat boiler. A fixed support is positioned at the midpoint of the tee, allowing only vertical (Z-axis) displacement but strictly restricting horizontal movement (XY plane), effectively treating it as a geometrically fixed point (zero point of thermal expansion) for that section. The two methanation reactors are fitted with sliding support structures (e.g., PTFE sliding pads) at the bottom of their skirts (or other supports), allowing them to slide freely along the axial direction of the tee (typically the radial direction of the methanation reactor) to accommodate thermal expansion displacement between the inlets and the midpoint of the tee. The main gas pipeline between the outlet of the large three-way valve and the waste heat boiler needs to be long enough to ensure that it has sufficient flexibility to absorb the difference in vertical thermal displacement between the fixed points of the methanation reactor (the fixed points of the supports and equipment) and the center line of the large three-way valve.
[0006] However, the traditional approach has certain drawbacks, as follows:
[0007] 1) The three ports of the large tee (i.e., two inlets and one outlet) bear significant stress. Due to the enormous mass of the methanation reactor, the huge frictional force generated during the sliding of the methanation reactor, combined with the incompletely released thermal stress, creates an extremely high horizontal load on the large tee, resulting in extremely high local stress within its structure (especially in the area where the inlet branch pipe connects to the main gas pipeline).
[0008] 2) The main gas pipeline, the outlet of the methanation reactor, and the interior of the gas transmission main are usually lined with refractory linings (made of refractory materials, such as castables) to withstand the high-temperature process gas. However, the refractory lining is inherently rigid, its coefficient of thermal expansion differs from that of the metal shell, and its tensile / shear strength is extremely low. When the metal shell undergoes slight deformation or relative displacement due to the aforementioned thermal stress, the rigid refractory lining cannot deform in coordination, making it highly susceptible to internal cracks or even large-area spalling.
[0009] 3) Due to the large mass of the methanation reactor, in order to prevent the sliding speed between its skirt and the sliding support structure from being too fast or to generate vibration and impact, it is often necessary to set up complex devices such as hydraulic dampers, which increases the complexity of the layout structure and the cost.
[0010] Therefore, in large-scale high-temperature methanation reactions and gas transmission layout structures (especially methanation production units using a "two reactors and one waste boiler" layout), how to effectively absorb or significantly reduce the thermal stress transmitted to the main three-way valve, and improve operational safety and durability, is a key technical challenge that urgently needs to be overcome in this field. Utility Model Content
[0011] The purpose of this invention is to provide a methanation reaction and gas transmission layout structure with thermal displacement self-compensation function, which reduces the thermal stress transmitted to the large three-way valve and improves the service life of the methanation reaction and gas transmission layout structure with thermal displacement self-compensation function.
[0012] To achieve the above objectives, this utility model provides a methanation reaction and gas delivery layout structure with self-compensating thermal displacement. This methanation reaction and gas delivery layout structure with self-compensating thermal displacement includes: a methanation reactor, horizontal pipes, a three-way cylinder, a main gas delivery pipe, a first support, a second support, a stress relief structure, and a first elastic support. Two methanation reactors are placed vertically, and two horizontal pipes are placed horizontally. The bottom of each methanation reactor is connected to the top of one end of a corresponding horizontal pipe. The three-way cylinder is placed horizontally, with both ends closed. Two inlet ports and one outlet port are opened on the cylinder wall of the three-way cylinder. The axes of the inlet and outlet ports are arranged horizontally and perpendicular to the axis of the three-way cylinder. The outlet port is located between the two inlet ports, and the openings of the outlet and inlet ports face opposite directions. The other ends of the two horizontal pipes are connected to the two inlets of the three-way cylinder, and the main gas pipe is connected to the outlet of the three-way cylinder. A first support is fixed to the bottom of the middle section of the three-way cylinder; a second support is fixed to the bottom of both ends of the three-way cylinder; a stress-relieving structure is supported at the bottom of the first and second supports; the stress-relieving structure can move in a direction parallel to the axis of the three-way cylinder to release axial thermal stress in the three-way cylinder; the stress-relieving structure can also move in a direction parallel to the axis of the horizontal pipes to release axial thermal stress in the horizontal pipes. A first elastic support is fixed to the bottom of the horizontal pipe, and the deformation direction of the first elastic support is parallel to the axis of the methanation reactor, corresponding to the lower part of the methanation reactor.
[0013] In the methanation reaction and gas delivery layout structure with thermal displacement self-compensation function provided by this utility model, in the first aspect, a stress relief structure is supported at the bottom of a first support and a second support. The first support and the second support are respectively fixedly connected to the bottom of the three-way cylinder, and the stress relief structure can move in a direction parallel to the axis of the three-way cylinder. In this way, the two ends of the three-way cylinder can be displaced in a direction parallel to the axis of the three-way cylinder through the movement of the stress relief structure, and are not constrained. At this time, the thermal stress along the axis of the three-way cylinder generated by the thermal expansion of the three-way cylinder (i.e., the axial thermal stress of the three-way cylinder) can be released through the displacement of the two ends of the three-way cylinder, thereby reducing or avoiding the probability of damage to the three-way cylinder and improving the service life of the three-way cylinder.
[0014] Secondly, the stress-relieving structure can also move along a direction parallel to the axis of the horizontal pipe. In this way, the tee can move along the axis of the horizontal pipe through the movement of the stress-relieving structure. At this time, the thermal stress generated by the thermal expansion of the horizontal pipe between the methanation reactor and the tee, along the axis of the horizontal pipe (or along the axis of the inlet), i.e., at least part of the axial thermal stress concentrated in the horizontal pipe and the thermal stress concentrated at the inlet of the tee, can be released through the movement of the tee. This reduces or avoids the probability of damage to the horizontal pipe and further reduces or avoids the probability of damage to the tee, thus increasing the service life of both the horizontal pipe and the tee. Furthermore, a longer and flexible horizontal pipe can absorb and release the forces (including bending moments) generated by the expansion displacement of the tee along its own axis, reducing or eliminating the impact and influence on the methanation reactor. This reduces or avoids the need for additional complex devices such as hydraulic dampers at the methanation reactor, thereby reducing the complexity and cost of the methanation reaction and gas transmission layout. Furthermore, because the horizontal pipe absorbs and releases the force generated by the expansion displacement of the three-way cylinder along its own axis, it can reduce the stress transmitted to the outlet of the methanation reactor. Therefore, it reduces the deformation at the outlet of the methanation reactor, and reduces the damage and spalling of the refractory lining at the outlet of the methanation reactor.
[0015] Thirdly, the first elastic support is fixed to the bottom of the horizontal pipe, and the deformation direction of the first elastic support is parallel to the axial direction of the vertically placed methanation reactor. The first elastic support corresponds to the lower part of the methanation reactor. In this case, the axial thermal stress generated by the thermal expansion of the methanation reactor can be released through the deformation of the first elastic support, which coincides with the axial direction of the methanation reactor. This reduces or avoids the probability of damage at the connection between the methanation reactor and the horizontal pipe, reduces or avoids damage and spalling of the refractory lining at the outlet of the methanation reactor, and improves the service life of the methanation reactor, the methanation reaction, and the gas transmission layout structure. Furthermore, the axial thermal stress generated by the methanation reactor during actual use is absorbed and released by the flexible horizontal pipe through bending, reducing or avoiding the transmission of the aforementioned axial thermal stress of the methanation reactor to the tee tube through the horizontal pipe. This further reduces or avoids the force acting on the tee tube in the radial direction, reducing or avoiding bending deformation at the ends of the tee tube. Based on this, the occurrence of cracks or detachment of the refractory lining inside the tee cylinder can be reduced or avoided, thereby ensuring the quality and service life of the tee cylinder and improving operational safety and durability.
[0016] Fourthly, adjusting the length of the horizontal pipe can control the bending moment at the connection between the horizontal pipe and the tee tube caused by the axial thermal expansion of the methanation reactor. The bending moment is absorbed and released by the flexible horizontal pipe, reducing the bending deformation of the tee tube at its ends. Based on this, cracks in the refractory lining inside the tee tube or its detachment from the inner wall of the tee tube can be reduced or avoided, thereby ensuring the quality and service life of the tee tube and improving operational safety and durability. Compared to existing gas transmission mains connected to the outlet of large tee tubes, the bending deformation of the tee tube in this application is smaller, resulting in less deformation of the tee tube acting on the gas transmission main. Therefore, cracks in the refractory lining inside the gas transmission main or its detachment from the inner wall of the gas transmission main are reduced or avoided.
[0017] In addition, the methanation reaction and gas transmission layout structure with thermal displacement self-compensation function mentioned above is simple in structure, easy to manufacture and use, and has low maintenance cost.
[0018] In one implementation, the stress relief structure includes: a support plate supported on the bottom of the first support and the second support; the support plate has a first guide hole extending along an axis parallel to the three-way cylinder; a first fastener passes through the first guide hole, and the second support is slidably connected relative to the support plate through the cooperation of the first fastener and the first guide hole;
[0019] A rolling assembly is rotatably supported on the bottom of the support plate in a direction parallel to the axis of the horizontal pipe, and a plurality of the rolling assemblies correspond to the first support and the second support respectively.
[0020] In one implementation, the scrolling component includes:
[0021] The first base plate is positioned opposite to and spaced apart from the support plate;
[0022] The first load-bearing member is located between the first base plate and the support plate, and is spaced apart from both the first base plate and the support plate.
[0023] The first rolling element is rotatably mounted on the first bearing element, and the first rolling element makes rolling contact with the first base plate and the support plate respectively; the rolling direction of the first rolling element is parallel to the axial direction of the horizontal pipe.
[0024] In one implementation, a groove is provided on the side of the first bearing member near the first base plate, and the rolling shaft of the first rolling member is rotatably disposed in the groove;
[0025] And / or, the methanation reaction and gas delivery layout structure with thermal displacement self-compensation function further includes: a pad or roller frame, located between the second support and the support plate, for reducing the sliding friction resistance between the second support and the support plate.
[0026] In one implementation, the methanation reaction and gas transport layout structure with thermal displacement self-compensation function also includes:
[0027] A limiting component is disposed on the support plate and the first base plate; the limiting component corresponds one-to-one with the rolling component; the first bearing member is located inside the limiting component, and the limiting component is used to limit the displacement of the support plate relative to the first base plate along the axial direction of the three-way cylinder.
[0028] In one implementation, the limiting component includes:
[0029] A first limiting member is disposed on the support plate;
[0030] The second limiting component is disposed on the first base plate;
[0031] Along the axial direction of the three-way cylinder, two first limiting members are distributed opposite to each other and spaced apart, and two second limiting members are distributed opposite to each other and spaced apart; the two second limiting members are located between the two first limiting members; the first bearing member is located between the two second limiting members; and a portion of the projection of the second limiting member along the axial direction of the three-way cylinder is located on the first limiting member.
[0032] In one implementation, the first elastic support includes:
[0033] The first connector is fixed to the bottom of the horizontal pipe;
[0034] A first spring support is provided at the bottom of the first connector; the deformation direction of the first spring support is parallel to the axial direction of the methanation reactor.
[0035] In one implementation, the methanation reaction and gas transport layout structure with thermal displacement self-compensation function also includes:
[0036] At least one second elastic support is fixed to the bottom of the horizontal pipe; the second elastic support is located between the first elastic support and the three-way cylinder; the deformation direction of the second elastic support is parallel to the axial direction of the methanation reactor.
[0037] In one implementation, the second elastic support includes:
[0038] The second connector is fixed to the bottom of the horizontal pipe;
[0039] The second spring support is located at the bottom of the second connector; the deformation direction of the second spring support is parallel to the axial direction of the methanation reactor.
[0040] The second base plate is positioned opposite to and spaced apart from the second spring support.
[0041] The second load-bearing member is located between the second base plate and the second spring support, and is spaced apart from both the second base plate and the second spring support;
[0042] The second rolling element is rolled on the second bearing member, and the second rolling element makes rolling contact with the end faces of the second base plate and the second spring support away from the second connecting member; the rolling direction of the second rolling element is parallel to the axial direction of the horizontal pipe.
[0043] In one implementation, the second elastic support includes:
[0044] The second connector is fixed to the bottom of the horizontal pipe;
[0045] The second spring support is located at the bottom of the second connector; the deformation direction of the second spring support is parallel to the axial direction of the methanation reactor.
[0046] The second base plate is fixed to the end face of the second spring support away from the second connector; the second base plate is provided with a second guide hole, which extends in a direction parallel to the axis of the horizontal pipe;
[0047] The substrate has a second base plate located between the substrate and the second spring support; a second fastener passes through the second guide hole, and the second base plate is slidably connected to the substrate by the second fastener cooperating with the second guide hole. Attached Figure Description
[0048] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:
[0049] Figure 1 This is a front view of the methanation reaction and gas delivery layout structure with thermal displacement self-compensation function in an embodiment of this utility model.
[0050] Figure 2 This is a top view of the methanation reaction and gas delivery layout structure with thermal displacement self-compensation function in an embodiment of this utility model;
[0051] Figure 3This is a front view of the structure formed by the three-way cylinder, the first support, the second support, and the stress relief structure in this embodiment of the present utility model;
[0052] Figure 4 This is an embodiment of the present utility model. Figure 3 Enlarged diagram of the middle section structure Figure 1 ;
[0053] Figure 5 This is an embodiment of the present utility model. Figure 3 Enlarged diagram of the middle section structure Figure 2 ;
[0054] Figure 6 This is a top view of the support plate in an embodiment of this utility model;
[0055] Figure 7 This is a left view of the structure consisting of a three-way cylinder, a first support, a second support, and a stress relief structure in an embodiment of this utility model.
[0056] Figure 8 This is an embodiment of the present utility model. Figure 7 Enlarged schematic diagram of the middle section structure;
[0057] Figure 9 This is a front view of the first support member in an embodiment of this utility model;
[0058] Figure 10 This is a top view of the first support member in an embodiment of this utility model;
[0059] Figure 11 This is a left view of the first support member in an embodiment of this utility model;
[0060] Figure 12 This is a bottom view of the first spring support in an embodiment of this utility model;
[0061] Figure 13 This is a front view of the second elastic support in an embodiment of this utility model;
[0062] Figure 14 This is a bottom view of the second base plate in an embodiment of this utility model.
[0063] Figure label:
[0064] 10-Methanation reactor, 11-Horizontal pipe, 12-T-shaped cylinder, 120-Inlet, 121-Outlet, 13-Waste heat boiler, 14-First support, 15-Second support, 16-Stress relief structure, 160-Rolling assembly, 1600-First base plate, 1601-First bearing member, 1602-First rolling member, 1603-Groove, 161-Support plate, 1610-First guide hole, 17-First elastic support, 170-First connector, 171-First spring support, 18-Pad plate, 19-Limiting assembly, 190-First limiting member, 191-Second limiting member, 20-Second elastic support, 200-Second connector, 201-Second spring support, 202-Second base plate, 2020-Second guide hole, 21-Gas main pipe. Detailed Implementation
[0065] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.
[0066] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0067] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.
[0068] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not 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 utility model.
[0069] In the description of this utility model, 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0070] To address the aforementioned technical problems, this invention provides a methanation reaction and gas delivery layout structure with self-compensating thermal displacement. This methanation reaction and gas delivery layout structure with self-compensating thermal displacement is used for methane production.
[0071] See Figures 1 to 4 The methanation reaction and gas transmission layout structure with thermal displacement self-compensation function includes: a methanation reactor 10, a horizontal pipe 11, a three-way cylinder 12, a main gas transmission pipe 21, a first support 14, a second support 15, a stress relief structure 16, and a first elastic support 17. Two methanation reactors 10 are placed vertically, and two horizontal pipes 11 are placed horizontally. The bottom of each methanation reactor 10 is connected to the top of one end of a corresponding horizontal pipe 11. The three-way cylinder 12 is placed horizontally, with both ends closed. Two inlet ports 120 and one outlet port 121 are opened on the cylinder wall of the three-way cylinder 12. The axes of the inlet ports 120 and the outlet port 121 are arranged horizontally and perpendicular to the axis of the three-way cylinder 12. The outlet port 121 is located between the two inlet ports 120, and the openings of the outlet port 121 and the inlet ports 120 face opposite directions. The other ends of the two horizontal pipes 11 are respectively connected to the two inlet ports 120 of the three-way cylinder 12, and the gas transmission main pipe 21 is connected to the outlet port 121 of the three-way cylinder 12; the first support 14 is fixed to the bottom of the middle part of the three-way cylinder 12; the second support 15 is fixed to the bottom of both ends of the three-way cylinder 12; the stress relief structure 16 is supported on the bottom of the first support 14 and the second support 15; the stress relief structure 16 can move along the direction N parallel to the axis of the three-way cylinder 12 to release the axial thermal stress of the three-way cylinder; the stress relief structure 16 can move along the direction M parallel to the axis of the horizontal pipe 11 to release the axial thermal stress of the horizontal pipe. The first elastic support 17 is fixed to the bottom of the horizontal pipe 11, the deformation direction Q of the first elastic support 17 is parallel to the axial direction P of the methanation reactor 10, and the first elastic support 17 corresponds to the bottom of the methanation reactor 10.
[0072] See Figures 1 to 4In the methanation reaction and gas delivery layout structure with thermal displacement self-compensation function provided in this embodiment of the utility model, in a first aspect, the stress relief structure 16 is supported at the bottom of the first support 14 and the second support 15. The first support 14 and the second support 15 are respectively fixedly connected to the bottom of the three-way cylinder 12, and the stress relief structure 16 can move along the direction N parallel to the axis of the three-way cylinder 12. In this way, the two ends of the three-way cylinder 12 can be displaced along the direction N parallel to the axis of the three-way cylinder 12 through the movement of the stress relief structure 16, and are not constrained. At this time, the thermal stress along the axis of the three-way cylinder 12 generated by the thermal expansion of the three-way cylinder 12 (i.e., the axial thermal stress of the three-way cylinder 12) can be released through the displacement of the two ends of the three-way cylinder 12, thereby reducing or avoiding the probability of damage to the three-way cylinder 12 and improving the service life of the three-way cylinder 12.
[0073] Secondly, the stress relief structure 16 can also move in a direction parallel to the axis of the horizontal pipe 11. In this way, the three-way cylinder 12 can move in a direction parallel to the axis of the horizontal pipe 11 through the movement of the stress relief structure 16. At this time, the thermal stress generated by the thermal expansion of the horizontal pipe 11 between the methanation reactor 10 and the three-way cylinder 12 along the axis of the horizontal pipe 11 (or along the axis of the inlet 120), that is, at least part of the axial thermal stress of the horizontal pipe 11 concentrated at the horizontal pipe 11 and the thermal stress concentrated at the inlet 120 of the three-way cylinder 12, can be released by the movement of the three-way cylinder 12, thereby reducing or avoiding the probability of damage to the horizontal pipe 11 and further reducing or avoiding the probability of damage to the three-way cylinder 12, and improving the service life of the horizontal pipe 11 and the three-way cylinder 12. Furthermore, the long and flexible horizontal pipe 11 can absorb and release the force generated by the expansion displacement of the three-way cylinder 12 along its own axis through its own bending, thereby reducing or eliminating the impact and influence of the expansion displacement of the three-way cylinder 12 on the methanation reactor 10. This reduces or avoids the need for additional complex devices such as hydraulic dampers at the methanation reactor 10, thus lowering the complexity and cost of the methanation reaction and gas transmission layout. In addition, because the horizontal pipe 11 absorbs and releases the force generated by the expansion displacement of the three-way cylinder 12 along its own axis, the stress transmitted to the outlet of the methanation reactor 10 can be reduced. Therefore, the deformation at the outlet of the methanation reactor 10 is reduced, thus reducing the damage and spalling of the refractory lining at the outlet of the methanation reactor 10.
[0074] Thirdly, the first elastic support 17 is fixed to the bottom of the horizontal pipe 11, and the deformation direction of the first elastic support 17 is parallel to the axial direction P of the methanation reactor 10. The first elastic support 17 corresponds to the lower part of the methanation reactor 10. At this time, the axial thermal stress generated by the thermal expansion of the methanation reactor 10 can be released through the deformation of the first elastic support 17 that coincides with the axial direction P of the methanation reactor 10, thereby reducing or avoiding the probability of damage at the connection between the methanation reactor 10 and the horizontal pipe 11, reducing or avoiding damage and spalling of the refractory lining at the outlet of the methanation reactor, and improving the service life of the methanation reactor 10 and the methanation reaction and gas transmission layout structure. Furthermore, the axial thermal stress generated by the methanation reactor 10 during actual use is absorbed and released by the flexible horizontal pipe 11 through bending, thereby reducing or avoiding the transmission of the aforementioned axial thermal stress of the methanation reactor to the three-way cylinder 12 through the horizontal pipe 11. This reduces or avoids the force acting on the three-way cylinder 12 in the radial direction, and reduces or avoids the bending deformation of the three-way cylinder 12 at its ends. Based on this, the occurrence of cracks in the refractory lining inside the three-way cylinder 12 or its detachment from the inner wall of the three-way cylinder 12 can be reduced or avoided, thereby ensuring the quality and service life of the three-way cylinder 12 and improving operational safety and durability.
[0075] Fourthly, adjusting the length of the horizontal pipe 11 can control the bending moment at the connection between the horizontal pipe 11 and the three-way cylinder 12 caused by the axial thermal expansion of the methanation reactor 10. The bending moment is absorbed and released by the flexible horizontal pipe 11, reducing the bending deformation of the three-way cylinder 12 at its end. Based on this, the occurrence of cracks in the refractory lining inside the three-way cylinder 12 or its detachment from the inner wall of the three-way cylinder 12 can be reduced or avoided, thereby ensuring the quality and service life of the three-way cylinder 12 and improving operational safety and durability. Furthermore, compared with the existing gas transmission main pipe connected to the outlet of the large three-way, the bending deformation of the three-way cylinder 12 in this application is smaller, resulting in less deformation of the three-way cylinder 12 acting on the gas transmission main pipe 21. Therefore, the occurrence of cracks in the refractory lining inside the gas transmission main pipe 21 or its detachment from the inner wall of the gas transmission main pipe 21 is reduced or avoided.
[0076] In addition, the methanation reaction and gas transmission layout structure with thermal displacement self-compensation function mentioned above is simple in structure, easy to manufacture and use, and has low maintenance cost.
[0077] As one possible implementation, the methanation reaction and gas transmission layout structure with thermal displacement self-compensation function described above may also include: a waste heat boiler 13. As described above, one end of the gas transmission main pipe 21 is connected to the outlet 121 of the three-way cylinder 12, and the other end of the gas transmission main pipe 21 is connected to the waste heat boiler 13.
[0078] The shape, material, and dimensions of the aforementioned horizontal pipe, tee, first support, and second support are not specifically limited here, as long as they meet the actual needs. For example, when a methanation reaction and gas transmission layout structure with thermal displacement self-compensation function is used to transport and mix methane, the materials used to make the horizontal pipe and tee must not react with or contaminate the methane. Furthermore, the length of the horizontal pipe can be selected according to the scale of the methanation reaction and gas transmission layout structure with thermal displacement self-compensation function to meet actual needs.
[0079] As one possible implementation, the end of the first support 14 that is fixedly connected to the three-way cylinder 12 matches the shape of the outer wall of the three-way cylinder 12. This can improve the firmness and stability of the connection between the first support 14 and the three-way cylinder 12. The second support 15 is similar and will not be described in detail here. For example, when the three-way cylinder 12 is a hollow cylindrical structure, the end of the first support 14 that is fixedly connected to the three-way cylinder 12 has an arc-shaped surface that fits against the cylinder.
[0080] In some embodiments, the first support 14 is fixed to the bottom of the middle part of the three-way cylinder 12 and the second support 15 is fixed to the bottom of both ends of the three-way cylinder 12 by welding or bonding, etc. The specific fixing method can be selected according to the actual situation and is not specifically limited here.
[0081] As one possible implementation, see Figure 4 and Figure 5 The stress relief structure 16 includes a rolling assembly 160 and a support plate 161.
[0082] See Figures 3 to 5 The support plate 161 is supported on the bottom of the first support 14 and the second support 15; for example, the support plate 161 is connected to the first support 14 and the second support 15 by bolts and nuts.
[0083] See Figures 3 to 6 The support plate 161 has a first guide hole 1610, which extends along the axis parallel to the three-way cylinder 12. The first fastener passes through the first guide hole 1610, and the second support 15 is slidably connected to the support plate 161 through the cooperation of the first fastener and the first guide hole 1610.
[0084] When the tee cylinder 12 expands axially, the second support 15 fixed at its end can be displaced relative to the support plate 161 along the axial direction of the tee cylinder 12. The end of the tee cylinder 12 is not constrained in the axial direction. In this way, the axial thermal stress of the tee cylinder can be released through the displacement of the end of the tee cylinder 12, thereby further reducing or avoiding the probability of damage to the tee cylinder 12 and improving the service life of the tee cylinder 12.
[0085] In some embodiments, see Figure 6 The length direction of the first guide hole 1610, the axial direction of the three-way cylinder 12, and the length direction of the support plate 161 are all consistent. It should be noted that the length of the first guide hole 1610 can be set according to the size of the methanation reaction with thermal displacement self-compensation function and the gas transmission layout structure, or the size of the three-way cylinder 12, to meet actual needs. Furthermore, the first fastener can be a bolt, screw, or connecting rod, etc. Of course, the first fastener is not limited to the examples above, and other components can be selected according to actual needs.
[0086] In one alternative approach, see Figure 4 and Figure 5 The methanation reaction and gas delivery layout structure with thermal displacement self-compensation function also includes a pad 18 or a roller frame. The pad 18 or roller frame is located between the second support 15 and the support plate 161 to reduce the sliding friction resistance between the second support 15 and the support plate 161. This not only helps release the axial thermal stress of the three-way cylinder but also improves the service life of the second support 15 and the support plate 161. For example, the support plate 161, the second support 15, and the pad 18 are connected by bolts and nuts.
[0087] As one possible implementation, a fixing hole is provided on the support plate, the connector passes through the fixing hole, and the first support is fastened to the support plate through the connector and the fixing hole.
[0088] In one alternative approach, see Figure 3 A pad 18 is also provided between the first support 14 and the support plate 161. For example, the support plate 161, the first support 14 and the pad 18 are connected by bolts and nuts.
[0089] For example, the aforementioned pad may include a polytetrafluoroethylene pad or a mirror-finished stainless steel plate.
[0090] As one possible implementation, see Figures 4 to 11 The rolling assembly 160 is rotatably supported on the bottom of the support plate 161 in a direction parallel to the axis of the horizontal pipe 11, and the multiple rolling assemblies 160 correspond to the first support 14 and the second support 15 respectively.
[0091] In this way, the three-way cylinder 12 can move along the axis parallel to the horizontal pipe 11 by the rolling assembly 160. At this time, the thermal stress generated by the thermal expansion of the horizontal pipe 11 between the methanation reactor 10 and the three-way cylinder 12 along the axis of the horizontal pipe 11 (or along the axis of the inlet 120), that is, at least part of the axial thermal stress concentrated at the horizontal pipe 11 and the thermal stress concentrated at the inlet 120 of the three-way cylinder 12, can be released by the movement of the three-way cylinder 12, thereby reducing or avoiding the probability of damage to the horizontal pipe 11 and further reducing or avoiding the probability of damage to the three-way cylinder 12, and improving the service life of the horizontal pipe 11 and the three-way cylinder 12.
[0092] In one alternative approach, see Figure 7 and Figure 8 The rolling assembly 160 includes a first base plate 1600, a first support member 1601, and a first rolling member 1602. The first base plate 1600 is opposite to and spaced apart from the support plate 161; the first support member 1601 is located between the first base plate 1600 and the support plate 161, and is spaced apart from both the first base plate 1600 and the support plate 161. The first rolling member 1602 is rotatably mounted on the first support member 1601, and the first rolling member 1602 makes rolling contact with both the first base plate 1600 and the support plate 161; the rolling direction of the first rolling member 1602 is parallel to the axial direction of the horizontal pipe 11.
[0093] In this way, the tee cylinder 12 can move along the axis parallel to the horizontal pipe 11 by the rolling of the first rolling element 1602. At this time, at least part of the axial thermal stress concentrated at the horizontal pipe 11 and the thermal stress concentrated at the inlet 120 of the tee cylinder 12 can be released by the movement of the tee cylinder 12, thereby reducing or avoiding the probability of damage to the horizontal pipe 11 and further reducing or avoiding the probability of damage to the tee cylinder 12, and improving the service life of the horizontal pipe 11 and the tee cylinder 12.
[0094] In one alternative approach, the shape, material, and size of the first base plate are not specifically limited, as long as they meet the actual needs.
[0095] In one alternative, the first rolling element may be a ball or a roller, etc.
[0096] In some embodiments, see Figures 8 to 11 The first rolling element 1602 is a roller with a rolling shaft. A groove 1603 is provided on the side of the first bearing element 1601 near the first base plate 1600. The rolling shaft of the first rolling element 1602 is rotatably disposed in the groove 1603. The size of the groove can be set according to the size of the rolling shaft of the roller, and is not specifically limited here.
[0097] It should be noted that the range in which the first rolling element rolls relative to the first base plate or support plate along the axis parallel to the horizontal pipeline can be set according to the size of the methanation reaction with thermal displacement self-compensation function and the gas transmission layout structure or the size of the three-way cylinder to meet actual needs.
[0098] As one possible implementation, see Figure 4 and Figure 5 The methanation reaction and gas transmission layout structure with thermal displacement self-compensation function also includes a limiting component 19, which is disposed on the support plate 161 and the first base plate 1600, and corresponds one-to-one with the rolling component 160. The first bearing member 1601 is located inside the limiting component 19, and the limiting component 19 is used to limit the displacement of the support plate 161 relative to the first base plate 1600 along the axial direction of the three-way cylinder 12.
[0099] See Figures 4 to 6 Since the first guide hole 1610 extends along the axis parallel to the three-way cylinder 12, the first fastener passes through the first guide hole 1610, and the second support 15 is slidably connected to the support plate 161 through the cooperation of the first fastener and the first guide hole 1610, the second support 15 can move relative to the support plate 161 along the axis parallel to the three-way cylinder 12. When the second support 15 slides, it applies a reaction force to the support plate 161, and the support plate 161 moves along the axis of the three-way cylinder 12 under the action of the reaction force. In order to limit the displacement of the support plate 161 relative to the first base plate 1600 along the axis of the three-way cylinder 12, this utility model provides a limit component 19.
[0100] In one alternative approach, see Figure 5 The limiting component 19 includes a first limiting member 190 and a second limiting member 191. The first limiting member 190 is disposed on the support plate 161, and the second limiting member 191 is disposed on the first base plate 1600. Along the axial direction of the three-way cylinder 12, the two first limiting members 190 are opposite to each other and spaced apart, and the two second limiting members 191 are opposite to each other and spaced apart; the two second limiting members 191 are located between the two first limiting members 190; the first bearing member 1601 is located between the two second limiting members 191; a portion of the projection of the second limiting member 191 along the axial direction of the three-way cylinder 12 is located on the first limiting member 190.
[0101] In actual use, when the support plate 161 moves along the axis parallel to the three-way cylinder 12 under the action of the reaction force, the first limiting member 190 provided on the support plate 161 abuts against the second limiting member 191 provided on the first base plate 1600, and the second limiting member 191 prevents the support plate 161 from moving further along the axis of the three-way cylinder 12.
[0102] For example, the first and second limiting members described above can be limiting blocks. Further, the limiting block may be in the shape of a cuboid or cylinder, etc. The first and second limiting members can be disposed on the support plate and the first base plate by welding or bonding.
[0103] As one possible implementation, see Figure 1 and Figure 12 The aforementioned first elastic support 17 includes a first connector 170 and a first spring support 171. The first connector 170 is fixed to the bottom of the horizontal pipe 11, and the first spring support 171 is supported on the bottom of the first connector 170. The deformation direction of the first spring support 171 is parallel to the axial direction P of the methanation reactor 10.
[0104] The end of the first connector that is fixedly connected to the horizontal pipe matches the shape of the outer wall of the horizontal pipe, which improves the firmness and stability of the connection between the first connector and the horizontal pipe. For example, when the horizontal pipe is a hollow cylindrical structure, the end of the first connector that is fixedly connected to the horizontal pipe has an arc-shaped surface that fits against the cylinder.
[0105] In some embodiments, the first connector described above may be a saddle support.
[0106] The aforementioned first spring support can be a spring support in the prior art; its specific structure will not be described in detail here, but can be found in the prior art. Furthermore, the stiffness of the spring in the aforementioned first elastic support can be selected according to the scale of the methanation reaction with thermal displacement self-compensation function and the gas transmission layout structure to meet actual needs.
[0107] In some embodiments, the axis of the first elastic support 17 along its height direction coincides with the axis of the methanation reactor 10, which is more advantageous for releasing the axial thermal stress of the methanation reactor by utilizing the first elastic support 17.
[0108] In some embodiments, see Figure 12 The first elastic support 17 is fastened to the base of the methanation reaction and gas transmission layout structure with thermal displacement self-compensation function by bolts.
[0109] As one possible implementation, see Figure 1 , Figure 13 and Figure 14The methanation reaction and gas transmission layout structure with thermal displacement self-compensation function also includes: at least one second elastic support 20. At least one second elastic support 20 is fixed to the bottom of the horizontal pipe 11. The second elastic support 20 is located between the first elastic support 17 and the three-way cylinder 12. The deformation direction of the second elastic support 20 is parallel to the axial direction P of the methanation reactor 10.
[0110] On the one hand, the second elastic support 20 can be used to bear the gravity load of the horizontal pipe 11. On the other hand, the axial thermal stress generated by the thermal expansion of the methanation reactor 10 can be released by the deformation of the second elastic support 20 in the direction P (vertical direction) parallel to the axis of the methanation reactor 10, thereby further reducing or avoiding the probability of damage to the methanation reactor 10 and improving its service life. In conjunction with the foregoing description, the elastic elements (e.g., springs) in the first elastic support 17 and the second elastic support 20 release the axial thermal stress of the methanation reactor through compression. Furthermore, in some embodiments, the axial thermal stress of the methanation reactor is reduced to a lower level through the coordinated deformation of the metal of the horizontal pipe 11.
[0111] The number of the aforementioned second flexible supports can be set according to the length of the horizontal pipe, as long as it meets the actual needs.
[0112] The following describes the specific structure of the second elastic support using two possible scenarios as examples. It should be noted that the following description is for understanding purposes only and is not intended to limit the specific application.
[0113] Example 1: The second elastic support includes: a second connecting member, a second spring support, a second base plate, a second bearing member, and a second rolling member.
[0114] The second connector is fixed to the bottom of the horizontal pipe, and the second spring support is supported at the bottom of the second connector. The deformation direction of the second spring support is parallel to the axis of the methanation reactor.
[0115] The end of the second connector that is fixedly connected to the horizontal pipe matches the shape of the outer wall of the horizontal pipe, which improves the firmness and stability of the connection between the second connector and the horizontal pipe. For example, when the horizontal pipe is a hollow cylindrical structure, the end of the second connector that is fixedly connected to the horizontal pipe has an arc-shaped surface that fits against the cylinder.
[0116] In some embodiments, the second connector described above may be a saddle support.
[0117] The aforementioned second spring support can be a spring support in the prior art; its specific structure will not be described in detail here, but can be found in the prior art. Furthermore, the stiffness of the spring in the aforementioned second elastic support can be selected according to the scale of the methanation reaction with thermal displacement self-compensation function and the gas transmission layout structure to meet actual needs.
[0118] Based on the previous description, a pry bar is inserted into the threaded pipe hole of the second spring support, and the threaded pipe is screwed upwards and pushed to the saddle support. At this time, the second elastic support can be used to bear the gravity load of the horizontal pipe.
[0119] The second base plate and the second spring support are positioned opposite each other and spaced apart. The second bearing member is located between the second base plate and the second spring support, and is spaced apart from both the second base plate and the second spring support. The second rolling member is rolled on the second bearing member, and makes rolling contact with the end faces of the second base plate and the second spring support away from the second connecting member. The rolling direction of the second rolling member is parallel to the axial direction of the horizontal pipe.
[0120] In this way, the horizontal pipe can move along the axis parallel to the horizontal pipe through the rolling of the second rolling element. At this time, the axial thermal stress of the horizontal pipe concentrated at the horizontal pipe can be released through the axial expansion displacement of the horizontal pipe, thereby further reducing or avoiding the probability of damage to the horizontal pipe.
[0121] Based on the preceding description, both the second elastic support and the stress relief structure can be used to release the axial thermal stress of horizontal pipes, further improving the safety and service life of horizontal pipes and tee cylinders.
[0122] In one alternative approach, the shape, material, and size of the second base plate are not specifically limited, as long as they meet the actual needs.
[0123] In one alternative, the second rolling element can be a ball or a roller, etc.
[0124] In some embodiments, the second rolling element is a roller with a rolling shaft. A groove is provided on the side of the second bearing member near the second base plate. The rolling shaft of the second rolling element is rotatably disposed in the groove. The size of the groove can be set according to the size of the rolling shaft of the roller, and is not specifically limited here.
[0125] It should be noted that the range in which the second rolling element rolls relative to the second base plate or the second spring support in a direction parallel to the axis of the horizontal pipeline can be set according to the size of the methanation reaction with thermal displacement self-compensation function and the gas transmission layout structure or the size of the horizontal pipeline to meet actual needs.
[0126] Example 2: See Figure 13 and Figure 14The aforementioned second elastic support 20 includes: a second connector 200, a second spring support 201, a second base plate 202, and a base plate. Figure 13 and Figure 14 (Not shown in the text).
[0127] See Figure 1 , Figure 13 and Figure 14 The second connector 200 is fixed to the bottom of the horizontal pipe 11, and the second spring support 201 is supported on the bottom of the second connector 200. The deformation direction of the second spring support 201 is parallel to the axial direction P of the methanation reactor 10. For a description of the second connector 200 and the second spring support 201, please refer to Example 1, which will not be repeated here.
[0128] The second base plate 202 is fixed to the end face of the second spring support 201 away from the second connector 200. For example, the second base plate 202 is welded, bonded, or connected to the end face of the second spring support 201 away from the second connector 200 by bolts and nuts.
[0129] See Figure 14 The second base plate 202 has a second guide hole 2020, which extends in a direction parallel to the axis of the horizontal pipe 11. The second base plate 202 is located between the base plate and the second spring support 201. The second fastener passes through the second guide hole 2020, and the second base plate 202 is slidably connected to the base plate by the cooperation of the second fastener and the second guide hole 2020.
[0130] When the horizontal pipe 11 undergoes axial expansion displacement, the second base plate 202 fixed on it slides on the base plate. In this way, the axial thermal stress of the horizontal pipe can be released through the displacement of the horizontal pipe 11, thereby further reducing or avoiding the probability of damage to the horizontal pipe 11 and improving the service life of the horizontal pipe 11.
[0131] In conjunction with the preceding description, both the second elastic support 20 and the stress relief structure 16 can be used to release the axial thermal stress of the horizontal pipe, further improving the safety and service life of the horizontal pipe 11 and the tee cylinder 12.
[0132] It should be noted that the length of the second guide hole can be set according to the size of the methanation reaction with thermal displacement self-compensation function and the gas transmission layout structure or the size of the horizontal pipeline to meet actual needs. Furthermore, the second fastener can be a bolt, screw, or connecting rod, etc. Of course, the second fastener is not limited to the examples above, and other components can be selected according to actual needs.
[0133] As one possible implementation, the waste heat boiler 13 is provided with a third support at its bottom, which is used to release the axial thermal stress of the horizontal pipe. The specific structure of the third support is not specifically limited here. For example, it can be the same as the structure used to release the axial thermal stress of the horizontal pipe in the stress relief structure, or it can be the same as the structure used to release the axial thermal stress of the horizontal pipe in the second elastic support. Alternatively, the third support can be the stress relief structure or the second elastic support described above.
[0134] The following description, using one possible implementation as an example, illustrates the process of thermal stress release in a methanation reaction and gas transmission layout structure with thermal displacement self-compensation. It should be noted that the following description is for understanding purposes only and is not intended to limit the specific implementation.
[0135] See Figures 1 to 14 The aforementioned three-way cylindrical body 12 has two inlet ports 120 and one outlet port 121 on its wall. The outlet port 121 is located in the middle region of the three-way cylindrical body 12, while the inlet ports 120 are closer to the end of the three-way cylindrical body 12 than the outlet port 121. The bottoms of the two methanation reactors 10 are respectively connected to the top of one end of two horizontal pipes 11, and the other ends of the two horizontal pipes 11 are respectively connected to the two inlet ports 120 of the three-way cylindrical body 12. One end of the gas transmission main pipe 21 is connected to the outlet port 121 of the three-way cylindrical body 12, and the other end of the gas transmission main pipe 21 is connected to the waste heat boiler 13. The two streams of methanated gas generated by the two methanation reactors 10 enter the three-way cylindrical body 12 through the two horizontal pipes 11 and the two inlet ports 120, respectively. After mixing in the three-way cylindrical body 12, the two streams of methanated gas enter the gas transmission main pipe 21 through the outlet port 121, and then enter the waste heat boiler 13 through the gas transmission main pipe 21. During this process, the high-temperature and high-pressure methanating gas causes thermal stress in three directions in the methanation reaction and gas transmission layout structure, which have a self-compensating thermal displacement function. The three directions of thermal stress are: the axial thermal stress generated by the thermal expansion of the methanation reactor 10, the thermal stress along the axis of the horizontal pipe 11 (or along the axis of the inlet 120) generated by the thermal expansion of the horizontal pipe 11 between the methanation reactor 10 and the three-way cylinder 12 (i.e., the axial thermal stress of the horizontal pipe), and the thermal stress along the axis of the three-way cylinder 12 generated by the thermal expansion of the three-way cylinder 12 (i.e., the axial thermal stress of the three-way cylinder).
[0136] The axial thermal stress in the methanation reactor is released through deformation P along the axis parallel to the vertically placed methanation reactor 10, generated by the first elastic support 17 and the second elastic support 20. Furthermore, the axial thermal stress in the methanation reactor is reduced to a lower level through coordinated metal deformation of the horizontal pipe 11. The axial thermal stress in the horizontal pipe is released through the axial expansion displacement of the horizontal pipe 11, the movement of the three-way cylinder 12, and the displacement of the waste heat boiler 13, utilizing the second elastic support 20, the stress release structure 16, and the third support. The axial thermal stress in the three-way cylinder is released through the displacement of the end of the three-way cylinder 12, utilizing the stress release structure 16. Furthermore, the axial thermal stress in the three-way cylinder also generates a bending moment in the horizontal pipe, which is released through coordinated metal deformation of the horizontal pipe. Based on this, with the cooperation of various structures included in the methanation reaction and gas transmission layout structure with thermal displacement self-compensation function, thermal stress in different directions is reduced, and the probability of damage to the methanation reactor 10, horizontal pipe 11, three-way cylinder 12, and welded joints set at the inlet 120 and outlet 121 is reduced or avoided, thereby improving the service life of the methanation reactor 10, horizontal pipe 11, and three-way cylinder 12. Furthermore, it can reduce the deformation of the metal, reduce or avoid the occurrence of cracks in the refractory lining inside the three-way cylinder 12 or its detachment from the inner wall of the three-way cylinder 12, thereby ensuring the quality and service life of the three-way cylinder 12 and improving operational safety and durability; reduce or avoid the occurrence of cracks in the refractory lining inside the outlet of the methanation reactor 10 or its detachment from the inner wall of the outlet of the methanation reactor 10, thereby ensuring the quality and service life of the outlet of the methanation reactor 10 and improving operational safety and durability; reduce or avoid the occurrence of cracks in the refractory lining inside the gas transmission main 21 or its detachment from the inner wall of the gas transmission main 21, thereby ensuring the quality and service life of the gas transmission main 21 and improving operational safety and durability.
[0137] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.
[0138] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A methanation reaction and gas delivery layout structure with thermal displacement self-compensation function, characterized in that, include: Two methanation reactors, placed vertically; Two horizontal pipes are placed horizontally, with the bottom of each methanation reactor connected to the top of one end of the corresponding horizontal pipe; A three-way cylindrical body is placed horizontally, with both ends of the three-way cylindrical body closed. Two inlet ports and one outlet port are opened on the cylindrical wall of the three-way cylindrical body. The axes of the inlet ports and the outlet ports are arranged horizontally and perpendicular to the axis of the three-way cylindrical body. The outlet port is located between the two inlet ports, and the openings of the outlet port and the inlet ports face opposite directions. The other ends of the two horizontal pipes are respectively connected to the two inlets of the three-way cylinder; A main gas supply pipe, which is connected to the outlet of the three-way cylinder; The first support is fixed to the bottom of the middle part of the three-way cylinder; The second support is fixed to the bottom of both ends of the three-way cylinder; A stress-relief structure is provided at the bottom of the first and second supports; The stress relief structure can move along a direction parallel to the axis of the three-way cylinder to release the axial thermal stress of the three-way cylinder; the stress relief structure can move along a direction parallel to the axis of the horizontal pipe to release the axial thermal stress of the horizontal pipe. A first elastic support is fixed to the bottom of the horizontal pipe; the deformation direction of the first elastic support is parallel to the axial direction of the methanation reactor; the first elastic support corresponds to the lower part of the methanation reactor.
2. The methanation reaction and gas feeding layout structure with thermal displacement self-compensation function according to claim 1, characterized in that, The stress relief structure includes: A support plate is provided on the bottom of the first support and the second support; the support plate has a first guide hole extending along the axis parallel to the three-way cylinder; a first fastener passes through the first guide hole, and the second support is slidably connected to the support plate through the cooperation of the first fastener and the first guide hole; A rolling assembly is rotatably supported on the bottom of the support plate in a direction parallel to the axis of the horizontal pipe, and a plurality of the rolling assemblies correspond to the first support and the second support respectively.
3. The methanation reaction and gas feeding layout structure with thermal displacement self-compensation function according to claim 2, characterized in that, The scrolling component includes: The first base plate is positioned opposite to and spaced apart from the support plate; The first load-bearing member is located between the first base plate and the support plate, and is spaced apart from both the first base plate and the support plate. The first rolling element is rotatably mounted on the first bearing element, and the first rolling element makes rolling contact with the first base plate and the support plate respectively; the rolling direction of the first rolling element is parallel to the axial direction of the horizontal pipe.
4. The methanation reaction and gas feeding layout structure with thermal displacement self-compensation function according to claim 3, characterized in that, The first bearing member has a groove on the side near the first base plate, and the rolling shaft of the first rolling member is rotatably disposed in the groove; And / or, the methanation reaction and gas delivery layout structure with thermal displacement self-compensation function further includes: a pad or roller frame, located between the second support and the support plate, for reducing the sliding friction resistance between the second support and the support plate.
5. The methanation reaction and gas transport layout structure with thermal displacement self-compensation function according to claim 3, characterized in that, The methanation reaction and gas transport layout structure with thermal displacement self-compensation function also includes: A limiting component is disposed on the support plate and the first base plate; the limiting component corresponds one-to-one with the rolling component; the first bearing member is located inside the limiting component, and the limiting component is used to limit the displacement of the support plate relative to the first base plate along the axial direction of the three-way cylinder.
6. The methanation reaction and gas feeding layout structure with thermal displacement self-compensation function according to claim 5, characterized in that, The limiting component includes: A first limiting member is disposed on the support plate; The second limiting component is disposed on the first base plate; Along the axial direction of the three-way cylinder, two first limiting members are distributed opposite to each other and spaced apart, and two second limiting members are distributed opposite to each other and spaced apart; the two second limiting members are located between the two first limiting members; the first bearing member is located between the two second limiting members; and a portion of the projection of the second limiting member along the axial direction of the three-way cylinder is located on the first limiting member.
7. The methanation reaction and gas feed layout structure with thermal displacement self-compensation function according to claim 1, characterized in that, The first elastic support includes: The first connector is fixed to the bottom of the horizontal pipe; A first spring support is provided at the bottom of the first connector; the deformation direction of the first spring support is parallel to the axial direction of the methanation reactor.
8. The methanation reaction and gas feeding layout structure with thermal displacement self-compensation function according to claim 1 or 7, characterized in that, The methanation reaction and gas transport layout structure with thermal displacement self-compensation function also includes: At least one second elastic support is fixed to the bottom of the horizontal pipe; the second elastic support is located between the first elastic support and the three-way cylinder; the deformation direction of the second elastic support is parallel to the axial direction of the methanation reactor.
9. The methanation reaction and gas feeding layout structure with thermal displacement self-compensation function according to claim 8, characterized in that, The second elastic support includes: The second connector is fixed to the bottom of the horizontal pipe; The second spring support is located at the bottom of the second connector; the deformation direction of the second spring support is parallel to the axial direction of the methanation reactor. The second base plate is positioned opposite to and spaced apart from the second spring support. The second load-bearing member is located between the second base plate and the second spring support, and is spaced apart from both the second base plate and the second spring support; The second rolling element is rolled on the second bearing member, and the second rolling element makes rolling contact with the end faces of the second base plate and the second spring support away from the second connecting member; the rolling direction of the second rolling element is parallel to the axial direction of the horizontal pipe.
10. The methanation reaction and gas feed layout structure with thermal displacement self-compensation function according to claim 8, characterized in that, The second elastic support includes: The second connector is fixed to the bottom of the horizontal pipe; The second spring support is located at the bottom of the second connector; the deformation direction of the second spring support is parallel to the axial direction of the methanation reactor. The second base plate is fixed to the end face of the second spring support away from the second connector; the second base plate is provided with a second guide hole, which extends in a direction parallel to the axis of the horizontal pipe; The substrate has a second base plate located between the substrate and the second spring support; a second fastener passes through the second guide hole, and the second base plate is slidably connected to the substrate by the second fastener cooperating with the second guide hole.