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 from Huatao Aerogel :
Company Name: Panjin Branch of PetroChina Liaohe Oilfield
Use location: Liaohe Oilfield Shuguang Oil Production Plant
Construction equipment / pipeline: above-ground steam pipeline
Use of the aerogels :
Huatao HT650 aerogel blanket (10mm thickness)
Working condition of this aerogel insulation felt :
Pipe diameter: 114mm
Internal fluid temperature: 328 ° C
Wind speed: 1m/s
Pipe length: 10km
difficulty when install the silica aerogel:
1. The pipe bracket must be blocked by thermal bridge to further reduce heat loss.
2, the waterproof performance must be optimized.
3, most of the pipelines are shuttled in the reeds, usually maintenance is very difficult.
Specific construction plan of silica aerogel insulation blanket :
3-layer Huatao HT650 aerogel blanket composite single-sided aluminum foil, wrapped with fiberglass cloth.
Data comparison before and after the transformation:
|
Name |
Unit |
Before |
After |
|
Insulation Method |
|
Composite silicate cotton |
Aerogel thermal insulation blanket |
|
Pipe Diameter |
mm |
114 |
114 |
|
Inside temperature |
℃ |
328 |
328 |
|
Working temperature |
℃ |
32 |
32 |
|
Wind Speed |
m/s |
1 |
1 |
|
Thermal Conductivity |
W/(m*℃) |
0.049 |
0.020 |
|
Thickness |
mm |
100 |
30 |
|
Heat dissipation area |
m2 |
0.986 |
0.546 |
|
Insulation surface temperature |
℃ |
46 |
42.8 |
|
Heat loss after heat preservation |
W/m |
256.8 |
109.7 |
|
Energy saving rate |
|
57.2% |
|
|
Other |
|
Local cracking, collapse, hot seam and overall insulation structure are uneven |
Insulation structure uniform without hot seam |
in conclusion:
Compared with the steam transfer pipeline of No. 47 boiler of Shuguang Oil Production Plant, the heat loss of the pipeline decreased by 57.2% before and after the transformation. The overall structure of the pipeline is stronger, more uniform and more beautiful than before the transformation.
Engineering picture:
