Project Overview
Customer challenges
Wear at multiple locations
After a period of operation, wear was observed at multiple locations on the stationary and rotating vanes
Stationary vane deformation
Some stationary vanes were worn and deformed from their original profile
Humid environment with corrosive agents
The operating environment contains moisture, sulfur and nitrogen, requiring the coating material to provide resistance to chemical corrosion
Harsh operating conditions
The coating material must resist wear from material at about 7 Mohs, resist chemical corrosion and maintain mechanical properties at 70–80°C
CURRENT CONDITION OF THE INDUCED DRAFT FAN STATIONARY BLADES
The induced draft fan stationary blades showed wear and deformation
Project Objectives
PROTECT ALL 72 STATIONARY VANES
Apply KALCRET BTX hard-compound coating to all 72 flue gas fan stationary vanes of Unit 2 at Vinh Tan 2 Thermal Power Plant
MEET OPERATING CONDITIONS
Use a solution that meets requirements for wear resistance, chemical corrosion resistance and operation at 70–80°C
WARRANTY PERIOD
The stationary vane system, after KALCRET BTX coating, is covered by a four-year warranty
Project execution process
Assess the existing condition
Assess wear on the stationary and rotating vanes, including stationary vanes that had become deformed from their original profile
Determine operating conditions
Determine coating requirements: wear resistance to material at about 7 Mohs, corrosion resistance in a humid environment containing sulfur and nitrogen, and retention of mechanical properties at 70–80°C
Select KALCRET BTX
GAC selected KALCRET BTX hard compound as the protective material for all 72 flue gas fan stationary vanes
Apply the coating
Apply KALCRET BTX coating to all 72 stationary vanes of Unit 2 at Vinh Tan 2 Thermal Power Plant
Apply per KALENBORN procedures
The coating was applied in accordance with Kalenborn's standard procedures
Supervise and complete
The application process was supervised by Kalenborn specialists. GAC completed the work on November 28, 2023, after more than two weeks of on-site work
Project results
COMPLETED COATING OF 72 STATIONARY VANES
GAC completed KALCRET BTX coating for all 72 flue gas fan stationary vanes on November 28, 2023, after more than two weeks of on-site work
FOUR-YEAR WARRANTY
The flue gas fan stationary vane system is covered by a four-year warranty following completion of the KALCRET BTX coating
APPLIED IN ACCORDANCE WITH KALENBORN PROCEDURES
The coating application was carried out in accordance with Kalenborn's standard procedures and under the supervision of Kalenborn specialists
“We highly appreciate Gia Anh’s professionalism and ability to meet the project schedule. The KALCRET cast lining solution has helped improve the operational reliability of the ore conveying pipeline system at Dung Quat while significantly reducing annual maintenance costs. Completing the delivery 20 days ahead of schedule was a highly commendable achievement.”
Mr. Tran Van Hoa
Project Management Board - VINH TAN 2
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