O2 Discharge Pressure: 150 Bar
Voltage and Frequency: 380/400/415V 3P 50HZ
Mode of operation: Full automatic
Technology Process of Oxygen Generating System
Principle of PSA Oxygen Generator
The PSA Oxygen Generator is an air separation unit which is based on molecular
sieves selective adsorption of nitrogen from air and can continuously generate gas oxygen with a purity 90-95% at ambient temperature, and the adsorbed nitrogen can be desorpted by decreasing the adsorbed bed pressure resulting cyclical adsorption-desroption operation.
1). Technology Flow Introduction
This PSA Oxygen Generating System is composed of Compressed Air System, Compressed Air Purification System, PSA Oxygen Making System, Oxygen Compressing System and oxygen filling system, etc.
* Air compressor provides compressed air with certain pressure;
* Air purification system purifies compressed air by removing the dust, oil and water;
* Oxygen and nitrogen separation system produce qualified oxygen gas with PSA technology;
* Oxygen compressing system increase pressure.
* Oxygen filling system can fill oxygen in cylinders.
2). Advantages of PSA Oxygen Generator
The traditional method of obtaining oxygen is to liquefy air and then carry out distillation at temperatures of around -180℃. Technology process is very complex, total cost for making oxygen is very high.Suitable for making oxygen ≥99.5% and multi-component gas.
The PSA generator can be operated under normal atmosphere, and its advantages are listed as following:
Low Production Cost.
Simple Process and Less Equipment, High Automation and Operation Convenience.
Quick starting and easy stopping. The system can provide product gas in 30 minutes after starting and also can be operated intermittently.
Low working pressure and safely.
Good flexibility. The purity and output for oxygen can be easily adjusted.
Suitable for the filed needing only oxygen gas<95% .
3). PSA oxygen generator Including :
The generator shall incorporate pressure swing absorption (PSA) technology and supplied as a plug and play component for simple installation on site, including oxygen monitoring, service indica- tions and relevant alarms.
Integral pressure vessels shall be GB (ASME option ) and validated for pressure gauge. Non return valves shall be included to avoid back flow from the outlet of the generator. The vessels shall include chemically produced zeolite to adsorb specific types of molecules, such as water vapour or nitrogen - providing infinite lifetime if the dryers and filters are properly serviced.
Pneumatic valves shall control the generation and regeneration process to ensure proper changeover between the two towers. Valves shall be degreased for oxygen use and provided with an oxygen certificate, delivered with every unit.
The generator shall include an oxygen sensor and analyser for continuous, online measurement of oxygen purity and shall be pro- vided with a calibration report delivered with every unit. The sensor shall be insulated by solenoid valves during standstill to provide longer sensor lifetime. An inlet pressure regulator shall be included to reduce the inlet pressure to a maximum working pressure of 650 kPa (6.5 bar) gauge. A silencer shall be include to reduce the noise level during the exhaust/regeneration process.
The oxygen purity produced shall be between 90-93% with a com- pressed air inlet quality in accordance with ISO 8573-1 clause 1-4-1 and an air outlet quality in accordance with ISO 8573-1 clause 1-2-1. The system shall operate at a maximum ambient temperature of 45°C. The generator will require a single phase low voltage 240-110V 50- 60Hz supply.
The control system shall provide an intelligent human machine interface including a real-time clock for recording operational parameters in the event log. The central control system shall include a BMS connection for a general fault condition.
The central control unit shall incorporate a user friendly touch screen 4” high-definition display with clear pictograms and indicators, providing easy access to system operational information.
•Supply voltage: 115-230V 50/60Hz
•Power consumption: 200W max
•CSA/UL approval available
•Protection degree: IP54 (Nema 3S)
The oxygen generator shall include a long life and low maintenance Zirconia oxygen sensor to extend the period between sensor re-calibration.
On screen alarms shall be:
•Low oxygen purity shut-down
•Low dewpoint shut-down*
* These functions are available if optional flowmeter / dewpoint analyser is installed (4-20 mA).
Compressors is mady by our own brand(KSTK) or Atlas Copco GA oil injected rotary screw compressors suitable for both continuous and frequent start/stop operation at a nominal outlet pressure of 750 kPa (7.5 bar) gauge. Compressors shall be supplied with a block and fin style after cooler with a dedicated quiet running fan to maximise cooling and efficiency. A multistage oil separator capable of achieving 2ppm oil carry over shall be fitted to minimise contamination and maintenance. EFF1(CEMEP) rated TEFC, IP55 class F electric motors shall be used and incorporate maintenance-free greased for life bearings. Motors with lower efficiency ratings are not acceptable.
The dryer is mady by our own brand air dryer or Atlas Copco FX refrigerated dryer module and shall include a simple plug and play concept. Pressure shall be self regulating. The dryer shall be able to reach 3°C PDP at 45°C. The dryer shall include the following components:
•Maximum pressure switch and fan control switch (FX 13-21)
•Hot gas bypass
•Air to refrigerant heat exchanger
Atlas Copco DD+ and PD+ high efficiency filter shall be used to remove oil and dust particles. An Atlas Copco QD activated carbon filter shall be included to absorb oil vapours providing clean air to ISO 8573-
1 class 1. An additional filter shall be included to protect against zeolite dust particles and shall be suitable for steam sterilisation in an autoclave.
Air Receiver Assembly
Air receivers shall comply with DIRECTIVE 97/23/EC, supplied with relevant test certificates. Each air receiver shall be fitted with a zero loss electronic drain valve. Float type drain valves are not acceptable. The receiver assembly shall be fitted with a pressure safety valve capable of passing the maximum flow output of the compressor at 10% receiver over pressure. The receiver shall be further protected by a safety pressure relief valve and include a pressure gauge.
Oxygen Buffer Vessel
Oxygen vessel shall be of steel construction and approved according to Fluid Group 1 and shall be sized to ensure the oxygen supply is continuous. The vessel shall be protected by a safety pressure relief valve and include a pressure gauge.
Optional Booster System
Oil free, high pressure pistons compressors shall be provided suitable for the on site filling of 15,000 kPa (150 bar) gauge or 20,000 kPa (200 bar) gauge oxygen cylinders. Compressors shall operate on an inlet pressure auto-cycling system (auto start/stop). Compressors shall include the following components:
•Compressor, motor, starter, start/stop buttons, hour meter, high pressure safety shutdown, low inlet pressure shutdown, safety relief valves, pressure gauges, drive belt, belt guard, oxygen clean and cooling fans.
Optional Filling Ramp
A high pressure filling ramp shall be available suitable for on site cylinder filling and shall consist of a high pressure bar with individual isolation valves at each cylinder connection. The cylinders shall be protected from over pressure by a safety pressure relief valve and shall include a pressure gauge. The filling ramp shall be tested up to 30,000 kPa (300 bar) gauge and shall be supplied complete with test certificate.