Ash Hopper
The Ferrybridge power plant had installed an original dipper plate into a water trough to seal the bottom of the boiler to the ash hopper.
Regular maintenance problems caused by this system have been encountered:
- contact and deformation of the dipper plate
- distortion of the water trough
- water leakage into the boiler house
- pressure loss due to no sealing of water trough
- regular cleaning and maintenance due to ash build up
- efficiency of draught fans
- Ferrybridge power plant
- Ferrybridge original design: Sealing system with dipper plate and water trough
DEKOMTE proposed a number of standard and high tech solutions to solve the problem.
The solution offered incorporates an internal ash guard, steel frame, fabric joint and fixing system. By offering a complete product scope, DEKOMTE can assure a long life and reliability in service.
The fabric solution installed, gives a gas tightness which maintains boiler efficiency and integrity.
| Dimension inside: | 32000 x 10000 mm |
| Boiler internal temperature: | 900 ºC |
| Temperature at fabric: | 300 ºC |
| Pressure static: | -5 mbar |
| Movement: | axial: -200 mm |
- DEKOMTE fabric expansion joint solution
Installation of expansion joint
- Removal of steel parts of the original expansion joint
- Installation of the DEKOMTE internal insulation bolster on the fabric expansion joint
- Repair of boiler wall and refractory
- Installation of DEKOMTE fabric expansion joint
- Installation of DEKOMTE expansion joint steel parts
- DEKOMTE fabric expansion joint in operation