Reconstruction of steam pipeline insulation in heavy oil production
----Application of aerogel blanket greatly reduces the heat loss of steam pipelines and prolongs the service life of insulation.
Customer Profile of Industrial insulation:
Company Name: Sinopec Nanyang Oilfield Company
Use location: Nanyang Oilfield Heavy Oil Production Plant
Construction equipment / pipeline: above-ground steam pipeline
Use of the product silica aerogel:
Huatao aerogel HT650 Aerogel blanket (6mm thickness)
Working condition of silica aerogel insulation felt:
Pipe diameter: 114mm
Internal fluid temperature: 300 ° C
Wind speed: no wind
Pipe length: 2000m
Difficulty when install the aerogel insulation blanket:
1, the insulation layer construction plan should take into account the economic and energy-saving, the need to use a combination of aerogel and common materials.
2, the pipe bracket must be blocked by thermal bridge treatment to further reduce heat loss.
3, the waterproof performance must be optimized.
Specific construction plan of how to install the aerogel felt:
Composite aerogel blanket insulation solution
(from inside and outside) 2 layers of 6mm thick aerogel Blanket + 50mm titanium ceramic insulation tile + aluminum skin
Note:
The 2-layer aerogel blanket is tightly wound with a single-sided aluminum foil fiberglass cloth to prevent heat leakage.
Use scenario data comparison:
|
Insulation Method |
|
Rock Wool |
Aerogel |
|
Pipe Diameter |
mm |
114 |
114 |
|
Inside temperature |
℃ |
300 |
300 |
|
Working temperature |
℃ |
20 |
20 |
|
Wind Speed |
m/s |
|
|
|
Insulation thickness |
mm |
120 |
65 |
|
Heat dissipation area |
m2 |
1.112 |
0.766 |
|
Insulation surface temperature |
℃ |
29 |
28 |
|
Heat loss after heat preservation |
W/m |
290.31 |
137.88 |
|
Ohters |
|
Insulation structure is uneven |
Insulation structure uniform without hot seam |
in conclusion:
The heat loss allowed by the company is as follows: the seasonal operating conditions allow a maximum heat loss of 308 W/m2, and the annual operating conditions allow a maximum heat loss of 186 W/m2. According to this requirement, the rock wool scheme is difficult to achieve, and Before they used rock wool for a year or two, there was a very obvious collapse phenomenon. The insulation structure was very soft, and the pipeline insulation layer was frequently replaced. This phenomenon has been improved a lot with the current aerogel compounding scheme.
Construction picture:
