Gas-solid two-phase flow control device for high-temperature methane catalytic cracking furnace

Abstract

This invention relates to the field of methane cracking control equipment, particularly a gas-solid two-phase flow control device for a high-temperature catalytic cracking furnace of methane. The control device includes a reaction shell, an inlet pipe, an airflow baffle, a bottom microfiltration assembly, a flow-equalizing microporous assembly, a top microfiltration assembly, an exhaust pipe, a viewing window, a video monitoring system, and a flow control device. The airflow baffle and the bottom microfiltration assembly are installed at the bottom of the inner cavity of the reaction shell, while the top microfiltration assembly is installed at the top of the inner cavity of the reaction shell. This invention, by setting the bottom microfiltration assembly, the top microfiltration assembly, and the flow-equalizing microporous assembly inside the cracking furnace, and coordinating with the detection of the gas-solid two-phase flow inside the cracking furnace to adjust the airflow rate, achieves uniform suspension of catalyst particles in the high-speed airflow inside the cracking furnace. This enables efficient cracking of methane under the action of the catalyst and the deposition of nano-carbon, reducing the production cost of carbon nanotubes.

Description

Technical Field

[0001] This utility model relates to the field of methane cracking control equipment, and in particular to a gas-solid two-phase flow control device for a high-temperature catalytic cracking furnace for methane. Background Technology

[0002] Carbon nanotubes, as an emerging material in the field of nanotechnology, are widely used in electronics, energy storage, biomedicine, and composite materials. Currently, the main production route for carbon nanotubes uses natural gas and propylene as raw materials and fixed-bed reactors as production equipment. However, this approach suffers from problems such as low catalytic cracking efficiency, low production efficiency, complex equipment, high energy consumption, and inability to achieve large-scale continuous production. Meanwhile, existing fluidized-bed reactors face the technical challenge of controlling the gas-solid two-phase flow within the reaction chamber. Utility Model Content

[0003] The technical problem this invention aims to solve is as follows: To address the technical problems described in the background art, this invention provides a gas-solid two-phase flow control device for a high-temperature catalytic cracking furnace for methane. By setting a bottom microfiltration component, a top microfiltration component, and a flow-equalizing microporous component inside the cracking furnace, and coordinating with the detection of the gas-solid two-phase flow inside the cracking furnace to adjust the gas flow rate, the catalyst particles inside the cracking furnace are uniformly suspended in the high-speed gas flow, thereby achieving efficient cracking of methane and nano-carbon deposition under the action of the catalyst, and reducing the production cost of carbon nanotubes.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A gas-solid two-phase flow control device for a high-temperature catalytic cracking furnace of methane includes a reaction shell, an inlet pipe, an airflow baffle, a bottom microfiltration assembly, a flow equalization microporous assembly, a top microfiltration assembly, an exhaust pipe, a viewing window, a video monitoring system, and a flow control device. The airflow baffle and the bottom microfiltration assembly are both installed at the bottom of the inner cavity of the reaction shell, and the top microfiltration assembly is installed at the top of the inner cavity of the reaction shell. One or more flow equalization microporous assemblies are installed in the inner cavity of the reaction shell, and the flow equalization microporous assemblies are located between the top microfiltration assembly and the bottom microfiltration assembly. A viewing window is installed on the reaction shell, and a video monitoring system is located in front of the viewing window. The flow control device is installed on the inlet pipe, and both the video monitoring system and the flow control device are communicatively connected to a computer.

[0006] Specifically, the reaction shell has a vertical structure.

[0007] Specifically, the bottom microfiltration assembly consists of a discharge pipe and a conical cylinder, with the discharge pipe located at the bottom of the conical cylinder.

[0008] Specifically, the conical cylinder comprises a perforated metal plate and a metal felt, with the metal felt being clamped and fixed between the two perforated metal plates.

[0009] Specifically, the flow equalization microporous component is a microporous ceramic plate.

[0010] Specifically, the top microfiltration assembly comprises a perforated metal plate and a metal felt, with the metal felt being clamped and fixed between the two perforated metal plates.

[0011] Specifically, the viewing window is made of transparent microcrystalline glass.

[0012] Specifically, the video surveillance system is a high-speed camera.

[0013] Specifically, the flow control device includes a flow meter and a regulating valve.

[0014] The beneficial effects of this invention are as follows: This invention provides a gas-solid two-phase flow control device for a high-temperature catalytic cracking furnace for methane. By setting a bottom microfiltration component, a top microfiltration component, and a flow-equalizing microporous component inside the cracking furnace, and by detecting the gas-solid two-phase flow inside the cracking furnace to adjust the gas flow rate, the catalyst particles inside the cracking furnace are uniformly suspended in the high-speed gas flow, thereby achieving efficient cracking of methane and nano-carbon deposition under the action of the catalyst, and reducing the production cost of carbon nanotubes. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] In the figure: 1. Reaction shell, 2. Inlet pipe, 3. Airflow baffle, 4. Bottom microfiltration assembly, 5. Flow equalization micropore assembly, 6. Top microfiltration assembly, 7. Exhaust pipe, 8. Viewing window, 9. Video monitoring system, 10. Flow control device, 41. Discharge pipe, 42. Conical cylinder. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] As attached Figure 1As shown, a gas-solid two-phase flow control device for a high-temperature catalytic cracking furnace of methane includes a reaction shell 1, an inlet pipe 2, an airflow baffle 3, a bottom microfiltration assembly 4, a flow equalization microporous assembly 5, a top microfiltration assembly 6, an exhaust pipe 7, a viewing window 8, a video monitoring system 9, and a flow control device 10. The airflow baffle 3 and the bottom microfiltration assembly 4 are both installed at the bottom of the inner cavity of the reaction shell 1, and the top microfiltration assembly 6 is installed at the top of the inner cavity of the reaction shell 1. One or more flow equalization microporous assemblies 5 are installed in the inner cavity of the reaction shell 1, and the flow equalization microporous assemblies 5 are located between the top microfiltration assembly 6 and the bottom microfiltration assembly 4. A viewing window 8 is installed on the reaction shell 1, and a video monitoring system 9 is located in front of the viewing window 8. The flow control device 10 is installed on the pipeline of the inlet pipe 2. Both the video monitoring system 9 and the flow control device 10 are communicatively connected to a computer.

[0021] The reaction shell 1 has a vertical structure.

[0022] The bottom microfiltration assembly 4 consists of a discharge pipe 41 and a conical cylinder 42, with the discharge pipe 41 located at the bottom of the conical cylinder 42.

[0023] The conical cylinder 42 comprises perforated metal plates and metal felt, with the metal felt sandwiched and fixed between the two perforated metal plates. The metal felt is a sintered metal felt with a filtration accuracy of 5 micrometers.

[0024] The flow equalization microporous component 5 is a microporous ceramic plate.

[0025] The top microfiltration assembly 6 consists of perforated metal plates and metal felt, with the metal felt sandwiched and fixed between the two perforated metal plates. The metal felt is a sintered metal felt with a filtration accuracy of 5 micrometers.

[0026] Window 8 is made of transparent microcrystalline glass that can withstand 1000℃.

[0027] The video surveillance system 9 uses high-speed cameras with a frame rate greater than 1000fps.

[0028] The flow control device 10 includes a flow meter and a regulating valve.

[0029] The method of use in this application is as follows: Methane feed gas enters the reaction shell 1 through the inlet pipe 2, and the airflow baffle 3 distributes the airflow to the bottom space of the reaction shell 1. The airflow passes through the bottom microfiltration component 4, and the catalyst particles with a diameter of 10-20 micrometers accumulated on the surface move upward with the airflow. They pass through the first-stage flow equalization microporous component 5 and the second-stage flow equalization microporous component 5, and the gas-solid two-phase flow is uniformly distributed under the action of the micropores. The video monitoring system 9 visualizes and measures the state of the catalyst particles in the gas-solid two-phase flow through the viewing window 8, and sends control commands to the flow control device 10 by performing algorithm analysis and calculation on the dynamic image data. By adjusting the control valve, the gas flow rate is adjusted to control the catalyst particles to be uniformly suspended in the airflow. The methane feed gas is in full contact with the catalyst surface and undergoes cracking under the catalytic action of the catalyst particles to produce nano-carbon atoms and hydrogen molecules. The nano-carbon atoms are deposited on the surface of the catalyst particles to form a carbon nanotube-catalyst community, which rises to the surface of the top microfiltration component 6 under the action of the airflow and is intercepted and accumulated. Uncracked methane gas and hydrogen gas pass together through the top microfiltration assembly 6 and are discharged from the exhaust pipe 7.

[0030] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A gas-solid two-phase flow control device for a high-temperature catalytic cracking furnace for methane, characterized in that, The device includes a reaction housing (1), an air inlet pipe (2), an airflow baffle (3), a bottom microfiltration assembly (4), a flow equalization micropore assembly (5), a top microfiltration assembly (6), an exhaust pipe (7), a viewing window (8), a video monitoring system (9), and a flow control device (10). The airflow baffle (3) and the bottom microfiltration assembly (4) are installed at the bottom of the inner cavity of the reaction housing (1), and the top microfiltration assembly (6) is installed at the top of the inner cavity of the reaction housing (1). The inner cavity of the reaction housing (1) has one or more flow equalization micropore assemblies (5), which are located between the top microfiltration assembly (6) and the bottom microfiltration assembly (4). A viewing window (8) is installed on the reaction housing (1), and a video monitoring system (9) is provided in front of the viewing window (8). The flow control device (10) is installed on the pipeline of the air inlet pipe (2). The video monitoring system (9) and the flow control device (10) are both connected to a computer.

2. The gas-solid two-phase flow control device for a high-temperature catalytic cracking furnace of methane according to claim 1, characterized in that: The reaction shell (1) has a vertical structure.

3. The gas-solid two-phase flow control device for a high-temperature catalytic cracking furnace of methane according to claim 1, characterized in that: The bottom microfiltration assembly (4) consists of a discharge pipe (41) and a conical cylinder (42), with the discharge pipe (41) located at the bottom of the conical cylinder (42).

4. The gas-solid two-phase flow control device for a high-temperature catalytic cracking furnace of methane according to claim 3, characterized in that: The conical cylinder (42) consists of a perforated metal plate and a metal felt, with the metal felt sandwiched and fixed between the two perforated metal plates.

5. The gas-solid two-phase flow control device for a high-temperature catalytic cracking furnace of methane according to claim 1, characterized in that: The flow equalization microporous component (5) is a microporous ceramic plate.

6. The gas-solid two-phase flow control device for a high-temperature catalytic cracking furnace of methane according to claim 1, characterized in that: The top microfiltration assembly (6) consists of a perforated metal plate and a metal felt, with the metal felt sandwiched and fixed between the two perforated metal plates.

7. The gas-solid two-phase flow control device for a high-temperature catalytic cracking furnace of methane according to claim 1, characterized in that: The viewing window (8) is made of transparent microcrystalline glass.

8. The gas-solid two-phase flow control device for a high-temperature catalytic cracking furnace of methane according to claim 1, characterized in that: The video surveillance system (9) is a high-speed camera.

9. The gas-solid two-phase flow control device for a high-temperature catalytic cracking furnace of methane according to claim 1, characterized in that: The flow control device (10) includes a flow meter and a regulating valve.

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