Chemical industry has the characteristics of large scale, long industrial chain and so on. It is the basic industry and an important part of Chinese national economy. In recent years, environmental protection has been paid more and more attention, and the green development of chemical industry is also very important. In addition, the chemical industry in the industrial integration, scientific and technological innovation is also in constant efforts to advance. DEAR air separation helps the chemical industry to transform and upgrade to be environmental-friendly. DEAR’s large-scale air separation plant KDON (Ar) - 18000 / 36000-600 can use ultra-low pressure discharge energy-saving air separation technology patent, which can reduce the energy consumption of equipment operation by 5% - 15% and save a lot of production costs.
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Solution advantages |
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The unit adopts molecular sieve purification, booster turbine expander to supply the cooling capacity of the unit, and the whole rectification hydrogen-free argon production process, which is safe, reliable and economical. The main reasons are as follows:
1.Good safety The whole set of device has the advantages of low operating pressure, simple process, high equipment safety, long switching cycle of molecular sieve system, increased service life of switching valve, and reduced potential hazards. A large amount of liquid oxygen is extracted from the main cooling (K1) to minimize the possibility of hydrocarbon accumulation.
2.High reliability A large amount of surplus nitrogen can be sent to the water cooling tower, reducing the load of the water chiller, reducing the energy consumption and cost of air separation, so that the reliability of the device is further improved.
3.Convenient operation and maintenanceandsimple process |
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PRODUCT |
OUTPUT N m³/h |
PURITY |
PRESSURE OUT OF COLD BOX Mpa |
TEMP |
NOTE |
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OXYGEN |
18000 |
≥99.6% O2 |
0.015 |
NORMAL |
EXTERNAL COMPRESS TO 2.5Mpa |
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LOX |
600 |
≥99.6% O2 |
Into tank |
SATURATED |
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Nitrogen |
18000 |
≤10ppmO2 |
0.008 |
NORMAL |
To pre-cooling system |
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Nitrogen |
18000 |
≤10ppmO2 |
0.008 |
NORMAL |
EXTERNAL COMPRESS TO 2.5Mpa |
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LAr |
600 |
≤1.5ppmO2 |
Into tank |
SATURATED |
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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
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Matching Units |
Unit |
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1. Centrifugal air compressor 2. Air pre-cooling system 3. Purification system 4. Booster turbine expander 5.Fractionator system 6.Oxygen compression system 7. Nitrogen compression system 8.Liquid storage system 9.Instrument control system 10.Electric control system |
1 Set 1 Set 1 Set 1 Set 1 Set 1 Set 1 Set 1 Set 1 Set 1 Set |
