Methane high-temperature catalysis system based on liquid metal catalyst
The high-temperature methane catalytic system using liquid metal catalysts has solved the problems of low efficiency and high energy consumption in traditional rotary kilns, achieving efficient, low-energy methane cracking and large-scale production.
Patent Information
- Application Number
- CN202423080126.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-13
AI Technical Summary
Traditional rotary kilns have low efficiency in intermittent cracking of atmospheric pressure natural gas, resulting in low production efficiency and high energy consumption, making large-scale production impossible.
A high-temperature methane catalytic system based on liquid metal catalysts is adopted. The system achieves automated continuous production through the combined connection of a regenerator, heater, high-temperature methane catalytic cracking furnace, hydrogen purification unit, desorbed gas compressor, three-phase separator, cooler, and venting air compressor, and optimizes the system's thermal balance.
This significantly improved methane cracking efficiency, reduced energy consumption, and enabled large-scale production.
Smart Images
Figure CN223628598U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of methane high-temperature catalytic system, especially methane high-temperature catalytic system based on liquid metal catalyst. BACKGROUND
[0002] The traditional technology adopts rotary heating furnace to carry out intermittent cracking to normal-pressure natural gas, which has the defects of low cracking efficiency (about 30%), low production efficiency, high energy consumption and incapability of large-scale production. INVENTION CONTENTS
[0003] The utility model provides a kind of methane high-temperature catalytic system based on liquid metal catalyst to solve the technical problems described in the background art.The combination of regenerator, heater, methane high-temperature catalytic cracking furnace, hydrogen purification device, analysis gas compressor, three-phase separator, cooler, vent gas compressor realizes automatic continuous production, and through system heat balance optimization, greatly reduce energy consumption, and greatly improve methane cracking efficiency.
[0004] The utility model discloses a kind of methane high-temperature catalytic system based on liquid metal catalyst, including regenerator, heater, methane high-temperature catalytic cracking furnace, hydrogen purification device, analysis gas compressor, three-phase separator, cooler, vent gas compressor, the cooler and three-phase separator are respectively connected on vent gas compressor by pipeline, vent gas compressor, analysis gas compressor, regenerator are respectively connected to hydrogen purification device by pipeline, analysis gas compressor, methane high-temperature catalytic cracking furnace, heater are respectively connected to regenerator by pipeline, heater and three-phase separator are respectively connected to methane high-temperature catalytic cracking furnace by pipeline, cooler and three-phase separator are connected.
[0005] Specifically, the methane high-temperature catalytic cracking furnace includes an insulating layer, a reaction shell, a microporous sieve plate, a filter screen, a temperature measuring tube and a heater one, the reaction shell is arranged in the insulating layer, the microporous sieve plate, the filter screen and the temperature measuring tube are arranged in the reaction shell, and the heater one is arranged between the reaction shell and the insulating layer.
[0006] Specifically, the methane high-temperature catalytic cracking furnace is provided with a liquid catalyst feeding port, a carbon nanotube discharging port, a methane inlet and a cracking tail gas outlet, the liquid catalyst feeding port, the carbon nanotube discharging port, the methane inlet and the cracking tail gas outlet are connected with the inner cavity of the reaction shell, the carbon nanotube discharging port is connected with the inlet of the three-phase separator, the liquid catalyst feeding port is connected with the outlet of the three-phase separator, the cracking tail gas outlet is connected with the inlet of the regenerator, and the methane inlet is connected with the outlet of the heater.
[0007] Specifically, the methane high-temperature catalytic cracking furnace is provided with a liquid catalyst feeding port, a carbon nanotube discharging port, a methane inlet and a cracking tail gas outlet, the liquid catalyst feeding port, the carbon nanotube discharging port, the methane inlet and the cracking tail gas outlet are connected with the inner cavity of the reaction shell, the carbon nanotube discharging port is connected with the inlet of the three-phase separator, the liquid catalyst feeding port is connected with the outlet of the three-phase separator, the cracking tail gas outlet is connected with the inlet of the regenerator, and the methane inlet is connected with the outlet of the heater.
[0008] Specifically, the filter screen comprises outer mesh layers and an inner mesh layer, and the inner mesh layer is fixed between the two outer mesh layers.
[0009] Specifically, the outer mesh layer is a 300-mesh metal screen.
[0010] Specifically, the inner mesh layer is a 1200-mesh metal screen.
[0011] Specifically, the methane high-temperature catalytic cracking furnace is a vertical cylindrical structure.
[0012] Specifically, the microporous sieve plate is a silica plate with nanometer micropores.
[0013] The methane high-temperature catalytic system based on a liquid metal catalyst has the advantages that: the combination of the regenerator, the heater, the methane high-temperature catalytic cracking furnace, the hydrogen gas purification device, the resolved gas compressor, the three-phase separator, the cooler and the vent gas compressor realizes automatic continuous production, the system heat balance optimization greatly reduces energy consumption, and the methane cracking efficiency is greatly improved. BRIEF DESCRIPTION OF DRAWINGS
[0014] The utility model is further described below in combination with the drawings and examples.
[0015] Figure 1 is the structural schematic diagram of the utility model;
[0016] Figure 2 is the sectional view of the methane high-temperature catalytic cracking furnace of the utility model;
[0017] Figure 3 is the structural schematic diagram of the methane high-temperature catalytic cracking furnace of the utility model;
[0018] Figure 1. regenerator, 2. heater, 3. methane high-temperature catalytic cracking furnace, 4. hydrogen gas purification device, 5. resolved gas compressor, 6. three-phase separator, 7. cooler, 8. vent gas compressor, 30. insulation layer, 31. reaction shell, 32. microporous sieve plate, 33. filter screen, 34. temperature measuring pipe, 35. heater one, 36. liquid catalyst feeding port, 37. carbon nanotube discharge port, 38. methane inlet, 39. cracking tail gas outlet.
[0019]
[0020] 31. reaction shell, 32. microporous sieve plate, 33. filter screen, 34. temperature measuring pipe, 35. heater one, 36. liquid catalyst feeding port, 37. carbon nanotube discharge port, 38. methane inlet, 39. cracking tail gas outlet.
[0021] 36. liquid catalyst feeding port, 37. carbon nanotube discharge port, 38. methane inlet, 39. cracking tail gas outlet. DETAILED DESCRIPTION
[0022] The utility model will be further explained in detail in combination with the drawings. These drawings are all simplified schematic diagrams, and only schematically show the basic structure of the utility model, so they only show the structure related to the utility model.
[0023] Figure 1 It is the structure schematic diagram of the utility model; Figure 2 It is the sectional view of the methane high-temperature catalytic cracking furnace of the utility model; Figure 3 It is the structure schematic diagram of the methane high-temperature catalytic cracking furnace of the utility model.
[0024] As shown in the accompanying Figure 1 As shown in the accompanying A kind of methane high-temperature catalytic system based on liquid metal catalyst, including regenerator 1, heater 2, methane high-temperature catalytic cracking furnace 3, hydrogen purification device 4, resolving gas compressor 5, three-phase separator 6, cooler 7, vent gas compressor 8, cooler 7 and three-phase separator 6 are connected on vent gas compressor 8 respectively by pipeline, vent gas compressor 8, resolving gas compressor 5, regenerator 1 are connected to hydrogen purification device 4 respectively by pipeline, resolving gas compressor 5, methane high-temperature catalytic cracking furnace 3, heater 2 are connected to regenerator 1 respectively by pipeline, heater 2 and three-phase separator 6 are connected to methane high-temperature catalytic cracking furnace 3 respectively by pipeline, cooler 7 and three-phase separator 6 are connected.
[0025] Hydrogen purification device 4 realizes the purification of hydrogen by isobaric adsorption and pressure reduction desorption process of adsorbent to methane molecule.
[0026] Three-phase separator 6 is vertical cylindrical structure, and solid carbon nanotube, liquid catalyst and gas phase cracking tail gas are efficiently separated using centrifugal separation and gravity sedimentation principle.
[0027] The working mode of the present application is as follows: after the gaseous methane is preheated by the regenerator 1 and heated by the heater 2, the high-temperature methane gas at 600-800℃ enters the liquid cracking catalyst at 600℃ in the methane high-temperature catalytic cracking furnace 3 to be cracked, generating carbon atoms and hydrogen molecules. The carbon atoms gather to form carbon nanotubes, and the uncracked methane molecules and hydrogen molecules pass through the filter screen 33 upwards and are discharged from the cracking tail gas outlet 39 and enter the regenerator 1 to exchange heat with the normal-temperature methane raw gas. The mixed gas after being cooled enters the hydrogen gas purification device 4 to be separated by the pressure swing adsorption principle to obtain high-purity hydrogen gas of more than 99.9%. The resolved methane-rich tail gas is pressurized by the resolved gas compressor 5 and then enters the methane raw gas pipeline for mixing and then enters the regenerator 1 again. The carbon nanotubes are discharged from the carbon nanotube discharge outlet 37 under the action of the gas flow and enter the three-phase separator 6 for three-phase separation. The solid carbon nanotubes are cooled to normal temperature by the low-temperature nitrogen gas in the cooler 7, and the liquid cracking catalyst returns to the liquid catalyst feeding port of the methane high-temperature catalytic cracking furnace 3 to re-enter the methane high-temperature catalytic cracking furnace 3. The cracking tail gas is discharged from the top of the three-phase separator 6 and is converged with the vent gas in the cooler 7 to enter the vent gas compressor 8 for pressurization. The pressurized gas enters the hydrogen gas purification device 4 for hydrogen gas purification and separation. The cracking catalyst is a bismuth-tin-gallium ternary liquid metal catalyst.
[0028] As shown in the accompanying drawings, Figure 2 The methane high-temperature catalytic cracking furnace 3 comprises a heat preservation layer 30, a reaction shell 31, a microporous sieve plate 32, a filter screen 33, a temperature measuring tube 34, and a heater 35. The reaction shell 31 is arranged in the heat preservation layer 30, and the microporous sieve plate 32, the filter screen 33, and the temperature measuring tube 34 are arranged in the reaction shell 31. The heater 35 is arranged between the reaction shell 31 and the heat preservation layer 30.
[0029] The working principle of the methane high-temperature catalytic cracking furnace 3 is as follows: the high-temperature methane gas at 600-800℃ enters the liquid cracking catalyst at 600℃ in the reaction shell 31. The methane gas molecules are cracked under the action of the catalyst to generate carbon atoms and hydrogen molecules. The carbon atoms in the liquid cracking catalyst in a suspended state gather to form carbon nanotubes, and the uncracked methane molecules and hydrogen molecules form bubbles in the liquid cracking catalyst. The bubbles drive the carbon nanotubes to rise to the surface of the liquid cracking catalyst under the action of the buoyancy, and the carbon nanotubes gather in the upper space.
[0030] The microporous sieve plate 32 is a silica plate with nanometer micropores.
[0031] As shown in the accompanying drawings, Figure 3As shown, the methane high-temperature catalytic cracking furnace 3 is provided with a liquid catalyst feeding port 36, a carbon nanotube discharging port 37, a methane inlet 38, and a cracking tail gas outlet 39, which are all in communication with the inner cavity of the reaction shell 31, the carbon nanotube discharging port 37 is in communication with the inlet of the three-phase separator 6, the liquid catalyst feeding port 36 is in communication with the outlet of the three-phase separator 6, the cracking tail gas outlet 39 is in communication with the inlet of the regenerator 1, and the methane inlet 38 is in communication with the outlet of the heater 2.
[0032] The filter screen 33 comprises an outer grid layer and an inner grid layer, and the inner grid layer is fixed between the two outer grid layers.
[0033] The outer grid layer is a 300-mesh metal screen.
[0034] The inner grid layer is a 1200-mesh metal screen.
[0035] The filter screen 33 is used for intercepting the carbon nanotubes in the upward floating uncracked methane molecules and hydrogen molecules.
[0036] The methane high-temperature catalytic cracking furnace 3 is a vertical cylindrical structure.
[0037] Based on the above ideal embodiments of the present application, the related personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims
1. A high temperature catalytic system for methane based on a liquid metal catalyst, characterized in that, The application relates to a methane high-temperature catalytic cracking device, which comprises a regenerator (1), a heater (2), a methane high-temperature catalytic cracking furnace (3), a hydrogen purifying device (4), a desorption gas compressor (5), a three-phase separator (6), a cooler (7), a vent gas compressor (8), the cooler (7) and the three-phase separator (6) are connected to the vent gas compressor (8) through pipelines respectively, the vent gas compressor (8), the desorption gas compressor (5) and the regenerator (1) are connected to the hydrogen purifying device (4) through pipelines respectively, the desorption gas compressor (5), the methane high-temperature catalytic cracking furnace (3) and the heater (2) are connected to the regenerator (1) through pipelines respectively, the heater (2) and the three-phase separator (6) are connected to the methane high-temperature catalytic cracking furnace (3) through pipelines respectively, and the cooler (7) and the three-phase separator (6) are connected.
2. The liquid metal catalyst based methane pyrolysis system of claim 1, wherein: The methane high-temperature catalytic cracking furnace (3) comprises an insulation layer (30), a reaction shell (31), a microporous sieve plate (32), a filter screen (33), a temperature measuring pipe (34) and a heater (35), the reaction shell (31) is arranged in the insulation layer (30), the microporous sieve plate (32), the filter screen (33) and the temperature measuring pipe (34) are arranged in the reaction shell (31), and the heater (35) is arranged between the reaction shell (31) and the insulation layer (30).
3. The liquid metal catalyst based methane pyrolysis system of claim 2, wherein: The methane high-temperature catalytic cracking furnace (3) is provided with a liquid catalyst feeding port (36), a carbon nanotube discharging port (37), a methane inlet (38) and a cracking tail gas outlet (39), the liquid catalyst feeding port (36), the carbon nanotube discharging port (37), the methane inlet (38) and the cracking tail gas outlet (39) are connected with the inner cavity of the reaction shell (31) in communication, the carbon nanotube discharging port (37) is connected with the inlet of the three-phase separator (6) in communication, the liquid catalyst feeding port (36) is connected with the outlet of the three-phase separator (6) in communication, the cracking tail gas outlet (39) is connected with the inlet of the regenerator (1) in communication, and the methane inlet (38) is connected with the outlet of the heater (2) in communication.
4. The liquid metal catalyst based methane pyrolysis system of claim 2, wherein: The filter screen (33) comprises an outer grid layer and an inner grid layer, and the inner grid layer is fixed between the two outer grid layers.
5. The liquid metal catalyst based methane pyrolysis system of claim 4, wherein: The outer grid layer is a 300-mesh metal screen.
6. The liquid metal catalyst based methane pyrolysis system of claim 4, wherein: The inner grid layer is a 1200-mesh metal screen.
7. The liquid metal catalyst based methane pyrolysis system of claim 1, wherein: The methane high-temperature catalytic cracking furnace (3) is a vertical cylindrical structure.
8. The liquid metal catalyst based methane pyrolysis system of claim 2, wherein: The microporous sieve plate (32) is a silica plate with nanometer micropores.