The model KDON-8300 / 8000 air separation plant (simultaneously extracting low-purity air oxygen and high-purity liquid oxygen) and two sets of PSAN1500-99.9% air separation equipment provided by DEAR air separation for Linyi Meide Gengchen metal materials Co., Ltd. were successfully started. After more than four months of operation, the equipment was stable and all indexes met or exceeded the design indexes.
DEAR air separation adheres to provide customers with high-quality air separation products, strictly follows the requirements of the contract. The equipment has a successful first time start up, and the oxygen is discharged smoothly, which is highly praised by Meide Gengchen.
The unit adopts molecular sieve purification and booster turbine expander to supplement cooling capacity. The oxygen concentration is low, the air compressor discharge pressure is very low, and the energy consumption of the whole equipment is low.
1. The safety is good. The oxygen evaporator is set to reduce the liquid oxygen concentration of the main cooling tower. At the same time, a large amount of liquid oxygen is discharged from the main cooling tower to reduce the risk of hydrocarbon accumulation in the main cooling tower.
2. Increase of benefit: Increase a pure oxygen tower to produce liquid pure oxygen while producing rich oxygen, increase of equipment benefit.
3. Reasonable utilization: Adopt air-cooling and water-cooling precooling mode to make full use of waste nitrogen to achieve the purpose of energy saving.
4. Advanced control: DCS control, high degree of automation, convenient operation
5. Energy saving and consumption reduction: Saving energy by adopt new molecular sieve to reduce air flow resistance and air compressor discharge pressure. Reduce the heating time of molecular sieve regeneration and save the energy consumption of regeneration.
|
Product |
Output Nm3 / h |
Purity |
Pressure oulet cold box Mpa |
temp |
note |
|
Oxygen |
8300 |
≥90% O2 |
0.045 |
Normol |
Self-pressurization to 45kpa |
|
LOX |
200 |
≥99.6% O2 |
Into the tank |
saturated |
|
|
Nitrogen |
8000 |
≤10ppmO2 |
0.008 |
Normal |
To pre-cooling System |
|
Nitrogen |
8000 |
≤10ppmO2 |
0.008 |
Normal |
External compression to 0.8MPa |
Note: the unit of measurement Nm³/ h is measured at 0 ℃, 0.1013mpa (a). It is called standard state quantity.
1.1 take oxygen and nitrogen at different times
1.2 operation cycle (interval between two large heating): ≥ two years
1.3 heating and uncooling time of the device: ~ 36 hours
1.4 starting time of the device (from the start of expander to the purity of oxygen product): ~ 40 hours
|
Matching Units |
Unit |
|
1. Centrifugal air compressor 2. Air precooling system 3. Purification system 4. Booster turbine expansion unit 5. Fractionator system 6. Nitrogen compression system 7. Liquid storage system 8. Instrument control system 9. Electric control system |
1 set 1 set 1 set 1 set 1 set 1 set 1 set 1 set 1 set |
