Gas process turbine GTT-9 is based on the modernized gas turbine GTT-3М. Modern approaches in engineering have allowed to get the required parameters with less number of stages and a unit in more reliable arrangement. GTT-9 is used in production lines of low concentration nitric acid UKL-7.
Specification
|
Parameyer |
GTT-9 |
GTT-3М |
|---|---|---|
|
Air flow rate at inlet to compressor, t/hours |
122,6 |
103 |
|
Air flow supplied to process, t/hour |
102,6 |
94,5 |
|
Air pressure after compressor, MPa |
0,737 |
0,25 |
|
Air temperature after compressor, °С |
280 |
175 |
|
Adiabatic efficiency of compressor, % |
86,6 |
86 |
|
Number of stages in compressor |
9 |
17 |
|
Power of compressor, MW |
8,93 |
7 |
|
Gas temperature before turbine, °С |
680 |
700 |
|
Turbine efficiency, % |
90,0 |
85 |
|
Power of turbine, MW |
9,0 |
7,25 |
|
Number of stages in turbine |
3 |
7 |
|
Rotor rotational speed, rev./min |
7500 |
5100 |
|
Consumption of fuel gas, kg/hour |
900 |
2000 |
|
Specified lifetime, hours |
150 000 |
130000 |
Competitive advantages and design features
- Increasing efficiency by minimum 5%
- Increasing the operation life by more than 40%
- Reduction of repair work labor by 50%
- High fuel efficiency (necessity of natural gas consumption for the same amount of nitric acid production is on 10% less then in GTT-ЗМ)
- Changing the airflow rate through the blades in the range 85-105% of rated capacity due to rotary inlet guide vanes
- Gaining of required compression ratio in 9 compression stages instead of 17
- Driving the compressor with n=7500 rev./min obtaines with three turbine stages
- Maximum temperature of disk’s projections does not exceed 360°C
- Ensuring efficiency of turbine at the temperature by inlet gas up to 800°C
- Increasing the blades service life more than double owing to nano-structured covering of turbine blades
- Availability of temperature reserve before the turbine to force parameters and to operate the unit in a wide range of atmospheric conditions witn keeping high performance and pressure
- Using the new sliding bearings with metal-fluoroplastic band for easy replacement and repair
Delivery set composition
- Turbo-compressor GTT-9 in the updated case
- Start up electric motor with variable frequency control
- Hydraulic coupling (start up electric motor – rotor)
- Frame for start up electric motor
- Kit of mounting components
- SPTA set
- Package of maintenance documentation
- Automatic control system (option)
- Oil system made as a separate oil module (option)