Method for treating inner surface of hydrocarbon cracking furnace tube
A technology for hydrocarbon cracking furnace tubes and cracking furnace tubes, which is applied in the field of treating the inner surface of hydrocarbon cracking furnace tubes, and can solve problems such as deposition reduction, and achieve the effects of increased surface roughness, densification and peeling, and improved compactness
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0097] A new furnace tube with the same size and material as Comparative Example 1 was used, and the furnace tube was coated according to the method of the present invention. First, extrude and grind the furnace tube according to the method of Comparative Example 4, and then let the furnace tube in pure H 2 In an atmosphere of normal pressure, the cracking furnace tube was heated to 1150 °C at a heating rate of 40 °C / h, and then the furnace tube was cooled to 450 °C at a cooling rate of 40 °C / h; The furnace tube was heated to 1000°C, and finally the furnace tube was treated according to the two-stage low oxygen partial pressure method. In the first stage, let the furnace tube be at a pressure of 0.3MPa, H 2 H with a molar ratio of 4000 to water vapor 2 -H 2 In the low oxygen partial pressure atmosphere, the temperature was kept at 1000 °C for 10 hours; in the second stage, the furnace tube was kept at a pressure of 0.4MPa, H 2 H with a molar ratio of 100 to water vapor 2 ...
Embodiment 2
[0100] A new furnace tube with the same size and material as Comparative Example 1 was used, and the furnace tube was coated according to the method of the present invention. The furnace tube was first extruded and ground according to the following conditions: (1) abrasive formula, 83% silicon carbide (400 mesh) + 17% vaseline; (2) extrusion grinding pressure, 2MPa; (3) extrusion grinding time, 500 seconds. Then let the furnace tube in pure H 2 In an atmosphere of normal pressure, the cracking furnace tube was heated to 1120 °C at a heating rate of 60 °C / h, and then the furnace tube was cooled to 400 °C at a cooling rate of 60 °C / h; The furnace tube was heated to 1050°C, and finally the furnace tube was treated according to the two-stage low oxygen partial pressure method. In the first stage, let the furnace tube be at a pressure of 0.3MPa, H 2 H with a molar ratio of 4000 to water vapor 2 -H 2 In the second stage, the furnace tube was kept at a pressure of 0.5MPa, H 2 H...
Embodiment 3
[0103] A new furnace tube with the same size and material as Comparative Example 1 was used, and the furnace tube was coated according to the method of the present invention. The furnace tube was first extruded and ground according to the following conditions: (1) abrasive formula, 83% silicon carbide (400 mesh) + 17% vaseline; (2) extrusion grinding pressure, 2MPa; (3) extrusion grinding time, 500 seconds. Then let the furnace tube in pure H 2 In an atmosphere of normal pressure, the cracking furnace tube was heated to 1160 °C at a heating rate of 80 °C / h, and then the furnace tube was cooled to 480 °C at a cooling rate of 100 °C / h; The furnace tube was heated to 900°C, and the furnace tube was treated according to the two-stage low oxygen partial pressure method. In the first stage, let the furnace tube be at a pressure of 0.4MPa, H 2 H with a molar ratio of 5000 to water vapor 2 -H 2 In the second stage, the furnace tube was kept at a pressure of 0.35MPa, H 2 H with a...
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle size | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More