U-shaped groove honeycomb core micro-inclination advection low-temperature propelling type catalytic reaction cavity

Abstract

The application discloses a U-shaped groove honeycomb core micro-inclination advection low-temperature propelling type catalytic reaction cavity, and belongs to the technical field of coal chemical catalytic reaction equipment. The application adopts S32001 duplex stainless steel honeycomb core plate to prepare a sectional U-shaped open groove body, and a sealing cover plate made of the same material is arranged at the top, so that a 60-120m super-long advection channel can be assembled. A regular square honeycomb halogen catalytic module is embedded in the cavity, and a flexible sealing structure is arranged to compensate for ceramic deformation, assembly error and thermal expansion and contraction, so that air flow short circuit and back mixing are avoided. The whole is a non-pressure process structure, and a shield independently bears the stratum load; the top is opened to assemble, and the catalyst paving, adjustment and replacement are convenient. The equipment is corrosion-resistant, light in weight, high in conversion rate and simple in operation and maintenance, solves the problem that the catalytic reaction equipment is limited in underground space, and is suitable for the coal underground gasification coupling low-temperature honeycomb core advection catalytic large-scale application.

Description

Technical Field

[0001] This invention relates to the technical fields of honeycomb core horizontal flow catalytic reactors, modular catalytic equipment, and underground coal chemical equipment. Specifically, it relates to a U-shaped groove honeycomb core micro-tilt horizontal flow low-temperature propulsion catalytic reaction chamber suitable for underground tunnel conditions, capable of rapid material replacement, and with horizontal flow and no back mixing. Background Technology

[0002] Traditional honeycomb core horizontal flow catalytic reactors are mostly ground-based high-pressure tanks, tubular fixed beds, or slurry bed structures, which are bulky and expensive. Fixed bed ceramic modules have large splicing errors and are prone to cracking and gas leakage due to thermal expansion and contraction. Slurry beds suffer from severe backmixing, high catalyst loss, and extremely low volume utilization.

[0003] The limited space in narrow underground tunnels makes it impossible to arrange traditional pressurized reaction equipment, and it is extremely difficult to fill, inspect, and replace catalysts in conventional sealed boxes. The constant temperature environment underground is not effectively utilized, and there is a lack of dedicated underground reaction chamber structures that are lightweight, corrosion-resistant, easy to assemble, and passively insulated. Summary of the Invention

[0004] Purpose of the invention: This invention provides a U-shaped honeycomb core micro-tilt horizontal flow low-temperature propulsion catalytic reaction chamber, which solves industry pain points such as limited underground space, gaps in ceramic module splicing, thermal deformation, difficulty in maintenance and material replacement, reaction backmixing, and high heat loss.

[0005] Technical solution: A U-shaped groove honeycomb core micro-tilt advection cryogenic catalytic reaction chamber includes: Segmented S32001 duplex stainless steel honeycomb core panel U-shaped channel, top sealing cover, long strip flange locking assembly, high temperature resistant sealing gasket, square honeycomb halogenation catalyst module assembly, flexible sealing compensation component. The U-shaped trough has a fully open top structure and is spliced ​​with multiple standard unit flanges. It can be assembled into an ultra-long straight flow channel of 60 to 120 meters. The entire cavity is set with a process micro-slope angle of 0.2°-1° along the flow direction of the liquid phase product. The outer walls on both sides of the tank, the bottom plate and the top sealing cover are made of S32001 duplex stainless steel honeycomb core plate, which is corrosion resistant, high temperature resistant, rigid, lightweight and suitable for reducing atmosphere and long-term underground humid environment. Square honeycomb ceramic catalytic modules are neatly arranged inside the U-shaped tank, and halogen low-temperature honeycomb core advection catalytic catalyst is loaded inside the module. The gaps between modules and between modules and the inner wall of the tank are filled with high-temperature resistant inorganic flexible sealing material, which adaptively compensates for sintering deformation, dimensional tolerances, and thermal expansion and contraction, and completely eliminates edge bypass airflow and local back mixing. The tank is fitted with an integral sealed cover at the top, and is connected to flanges and high-temperature gaskets around the perimeter and bolted to form a closed micro-positive pressure reaction chamber. This cavity is located inside the underground shield tunnel and does not bear any pressure from the stratum structure. It is only used as a special functional cavity for process flow guidance and honeycomb core advection catalytic reaction. During installation, the cavity is set with a process micro-slope angle of 0.2°-1° along the flow direction of liquid phase products. The wedge-shaped steel pad (8) inside the tunnel is used as the installation base surface to complete the specific installation tilt angle setting. The upstream gasification syngas flange is directly connected, and the entire process is driven by a unidirectional piston-type advection, ensuring the stable and efficient conduction of the low-temperature honeycomb core advection catalytic reaction.

[0006] Beneficial effects 1. The U-shaped open structure allows for paving, adjustment, and material replacement from top to bottom within the confined underground space, significantly reducing the difficulty of construction and maintenance; 2. S32001 duplex stainless steel honeycomb core panel structure, which is temperature and corrosion resistant, lightweight, and has good rigidity, making it suitable for long-term underground working conditions. 3. Flexible sealing and fault-tolerant design perfectly solves the problems of ceramic module deformation, error, and gaps caused by thermal expansion and contraction; 4. Ultra-long straight horizontal flow channel, no dead angles, no back mixing, doubles the efficiency of honeycomb core horizontal flow catalytic conversion; 5. Relying on the constant temperature of the underground strata and the composite insulation of the interlayer, the reaction temperature is constant and the energy consumption is extremely low; 6. The non-pressure lightweight design features a simple structure, low cost, and strong modular scalability, making it suitable for large-scale replication and implementation. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the arrangement of the present invention within an underground shield tunnel; Figure 3 This is a side view of the arrangement of the present invention inside an underground shield tunnel; Explanation of reference numerals in the attached figures: 1-U-shaped channel, 2-Sealing cover plate, 3-Flange locking assembly, 4-Honeycomb halogen catalytic module, 5-Flexible sealing compensation assembly, 6-Stainless steel honeycomb core plate, 7-Shield tunnel, 8-Wedge-shaped steel pad, 9-Shield tunnel pipeline area. Detailed Implementation Plan S32001 stainless steel honeycomb core panel U-shaped channel is prefabricated in 12m standard section modular prefabrication, with flanges aligned sequentially inside the channel and the whole assembly is spliced ​​to the designed total length of 60m. The square honeycomb halogenation catalytic modules are stacked one by one, and the joints are filled with ceramic fiber gaskets and high-temperature resistant expansion sealant. S32001 Duplex Stainless Steel Honeycomb Core Panel: Integrated honeycomb core stainless steel double-layer structure, moisture-proof and seepage-proof. After all modules are installed and sealed, the entire top cover is hoisted in place, and the long flanges are symmetrically locked in sections to ensure uniform sealing and no deformation. The inlet end uses a high-pressure, high-temperature resistant flange to be sealed and connected to the exhaust gas device of the upstream supercritical gas turbine. The entire cavity is set with a 0.28° process micro-downward slope angle along the flow direction of liquid phase products. The system operates under a slight positive pressure, with syngas flowing uniformly through the honeycomb catalytic channels in one direction, stably completing the low-temperature honeycomb core advection catalytic synthesis reaction at 180-220℃.

Claims

1. A U-shaped groove honeycomb core micro-tilt horizontal flow low-temperature propulsion catalytic reaction chamber, characterized in that: Includes segmented U-shaped channel (1), top sealing cover plate (2), flange locking assembly (3), honeycomb halogen catalyst module (4), and flexible sealing compensation assembly (5); The U-shaped trough (1) is made of S32001 duplex stainless steel honeycomb core plate (6), and has a top open trough structure. The multi-section flange locking assembly (3) is spliced ​​together to form a 60-120m long straight flow channel. The cavity is set with a 0.2°-1° process micro-slope inclination angle along the liquid phase product flow direction. Square honeycomb halogen catalyst modules (4) are arranged in an orderly manner inside the U-shaped tank (1), and flexible sealing compensation parts (5) are set around the modules to seal the assembly gaps and thermal deformation gaps. The U-shaped channel and the top sealing cover (2) are sealed together by bolts and high-temperature gaskets; The tank is located inside the underground shield tunnel and serves only as a process reaction unit. It does not bear the pressure load of the stratum. Syngas is propagated in a unidirectional advection to complete the low-temperature honeycomb core advection catalytic synthesis.

2. The reaction chamber according to claim 1, characterized in that: The U-shaped channel has a modular segmented structure, with each segment being a standard module, allowing for independent disassembly, transportation, and replacement.

3. The reaction chamber according to claim 1, characterized in that: The honeycomb halogen catalytic module (4) is a square outer contour honeycomb ceramic support, loaded with halogen-controlled halogen honeycomb core advection catalytic catalyst, suitable for low temperature reduction conditions of 180-220℃.

4. The reaction chamber according to claim 1, characterized in that: The cavity is designed as a slightly positive pressure pressureless container, relying on the underground sealed environment to achieve sealed gas transport and reaction.

5. The reaction chamber according to claim 1, characterized in that: The air inlet adopts a sealed flange direct connection structure, which is seamlessly connected to the upstream underground gasification equipment to prevent the process gas from escaping.

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