Complex machine set (CМА-2М) and gas process turbines (GTT-12) are used in production lines of low concentration nitric acid AK-72.
Competitive advantages and design features of СМА-2М (GTT-12)
- Balance of turbine operation owing to redistribution of power between High Pressure Turbine (HPT) and Low Pressure Turbine (LPT)
- Updating design of 1150-42-1 nitrous gas compressor
- Increasing the axial compressor’s capacity more than 10%
- Absorption of excess deformation bellows compensator owing to upgraded design of the midcase
- Reducing the temperature loads onto the midcase owing to relocation the cooling manifold to the HPT diaphragm outside the case
- Minimization of leakage in the horizontal split owing to the width augmentation of inlet nozzle flanges and the use of an additional fastening means
- Self-tightening of splits during heating due to changing materials of case-constituting parts
Technical characteristics
|
Parameters |
Unit |
GTT-12 |
CМА-2М |
|---|---|---|---|
|
Pressure before axial compressor (AC) |
kgf/cm2 |
0,96 |
0,96 |
|
Pressure at outlet from axial compressor (AC) |
kgf/cm2 |
3,9 |
4,6 |
|
Pressure behind nitrosegas compressor (NC) |
kgf/cm2 |
10,5 |
12,2 |
|
Pressure before high-pressure turbine (HPT) |
kgf/cm2 |
9,05 |
10,5 |
|
Rotational speed of low-pressure turbine (LPT) |
rev./min |
5200 |
5200 |
|
Rotational speed of high-pressure turbine (HPT) |
rev./min |
5000 |
5000 |
|
Temperature of atmospheric air |
0С |
20 |
20 |
|
Gas temperature before turbine |
0С |
760 |
760 |
|
Gas temperature behind turbine |
0С |
367 |
357 |
|
Air temperature behind axial compressor (AC) |
0С |
190 |
215 |
|
Gas temperature before nitrose gas compressor (NC) |
0С |
65 |
70 |
|
Air consumption supplied to processing (total) |
m3/hour |
245000 |
283000 |
Service lifefactors
- Average over haul period – not less than 15000 hours when the number of starts is not more than 50
- Average overhaul period – not less than 30000 hours when the number of starts is not more than 100
- Total life period – not less than 120 000 hours when the number of starts is not more than 320
- When reducing the number of starts exceeds the values shown above, the service life period is 100 hours after each emergency stop, and by 50 hours after each normal start
- After overall reconditioning, CМА-2М (GTT-12) and its sub-units acquire new service life factors
- Working blades of high-pressure turbine – 45 000 hours
- Guiding vanes high-pressure turbine – 60 000 hours
- Disks of high-pressure turbine – 60 000 hours
- High-pressure turbine casing-constituting parts – 120 000 hours
- Insertion piece – 60 000 hours
- Minimization of leakage in the horizontal split owing to the width augmentation of inlet nozzle flanges and the use of an additional fastening means
- Self-tightening of splits during heating due to changing materials of case-constituting parts
tel: +7 (4212) 381-461, 381-851
e-mail: export@dalenergomash.ru [1]