Principle of PSA pressure swing adsorption oxygen generation technology

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Principle of PSA pressure swing adsorption oxygen generation technology I. Principle of PSA pressure swing adsorption oxygen generation technology – Desorption at atmospheric pressure (Oxygen generator by pressure swing adsorption). Compressed air is passed through an air pre-treatment system to remove solid impurities such as oil and dust, as well as most of the gaseous water. It then enters an oxygen-nitrogen separation unit equipped with zeolite molecular sieves (ZMS). Nitrogen, carbon dioxide, and water vapor in the air are selectively adsorbed by the adsorbent, while oxygen passes through the separation unit and is concentrated as the product gas. When the adsorbent in the oxygen-nitrogen separation unit approaches adsorption saturation, compressed air enters another regenerated adsorption tower to continue the oxygen production process. The adsorption tower that has reached saturation is depressurized by releasing air to atmospheric pressure, and some of the produced oxygen is introduced to clean the adsorbent bed, thereby desorbing and regenerating the saturated adsorbent in preparation for the next cycle of adsorption. Multiple oxygen-nitrogen separation units, arranged in parallel or series, are switched cyclically under the control of a PLC or DCS system to achieve continuous oxygen production, which is known as oxygen generation by normal-pressure desorption pressure swing adsorption (Oxylead-PSAHG/O). II. Composition of the PSA pressure swing adsorption oxygen generation system III. Features of the SSS pressure swing adsorption oxygen generation system ◇ The structural design of the adsorption tower breaks away from the constraints of the traditional \"radius-to-height ratio\"; the size of the adsorption tower is determined based on the amount of adsorbent used. ◇ A consistent air flow direction through the adsorption tower prevents the adsorbent from suffering fatigue wear due to frequent switching cycles, ensuring an 8-year service life for the adsorbent. ◇ The unique method of loading the adsorbent with inertial force enables the loading density of the adsorbent to reach 1.08 times its bulk density. It is packed tightly to prevent fluidization and peristalsis of the adsorbent layer. Further ensure the service life of the adsorbent. ◇ The airflow in the adsorption tower is evenly distributed, preventing short-circuit flow and ensuring a plug flow of gas in the mass transfer zone within the tower. It improved the adsorption efficiency of the adsorbent. ◇ The overall installation layout of the equipment is reasonable. User-friendly design, simple to operate. Starting and stopping require only one control button. ◇ Simple TES principle: Equipment maintenance requires only replacing the oxygen electrode every 10 months ； Replace the third-stage filter element every 8 months, and the first and second-stage filter elements every 6 months. IV. PSA Pressure Swing Adsorption Oxygen Generation System – On-site Oxygen Production/Application Areas
Steelmaking in electric furnaces: Required oxygen purity 93%
Flame support in kilns: Required oxygen purity 90–94%
Ironmaking in blast furnaces: Required oxygen purity 90%
Chemical fermentation: Required oxygen purity 90%
Welding and cutting: Required oxygen purity 93–94%
Carbon black processing: Required oxygen purity 90%
Gold refining: Required oxygen purity 93%
Fertilizer industry: Required oxygen purity 93%
Wastewater treatment: Required oxygen purity 90%
Pharmaceutical production: Required oxygen purity 90%
Aquaculture: Required oxygen purity 90%
Paper manufacturing: Required oxygen purity 90–93%
Glass processing: Required oxygen purity 90–94%
Waste incineration: Required oxygen purity 90%
Brass processing: Required oxygen purity 94%
Ozone generation: Required oxygen purity 90–95%
Lamp manufacturing: Required oxygen purity 93%
Healthcare: Required oxygen purity 90–94%

V. Technical Specifications for SSS PSA Pressure Swing Adsorption Oxygen Generation System
Equipment Model | Oxygen Purity (%) | Oxygen Flow Rate (Nm3/hr) | Required Air Flow Rate (Nm3/hr) | Installed Power (KW) | Interface Dimensions & Footprint (Length×Width×Height) in meters
oxylead-AO-4A | 90–95% | 4.1 | 40.5 | 5.3 | 1.6×1.4×2.4
oxylead-AO-6A | 6.2 | 61.3 | 7.5 |
oxylead-AO-8A | 8.2 | 81.1 | 11.5 |
oxylead-AO-15A | 13.5 | 133.5 | 16 | 2.2×1.6×2.4
oxylead-AO-18A | 16.5 | 163.2 | 19.5 |
oxylead-AO-20A | 19.2 | 213.6 | 23 |
oxylead-AO-30A | 28.4 | 315.9 | 31 | 2.4×1.8×2.4
oxylead-AO-35A | 34.5 | 383.8 | 38.2 |
oxylead-AO-40A | 39.8 | 442.8 | 47.2 | 3.0×2.4×2.6
oxylead-AO-50A | 50.6 | 562.9 | 58 |
oxylead-AO-70A | 68.8 | 805.9 | 79 | 3.5×2.4×2.6
oxylead-AO-75A | 76.2 | 892.3 | 94 |
oxylead-AO-80A | 83.0 | 971.9 | 114 |
oxylead-AO-120A | 120.5 | 1411 | 137.5 | 4.0×2.4×2.8
oxylead-AO-140A | 141.5 | 1657 | 167 |
oxylead-AO-180A | 180.5 | 2113.6 | 210 | 4.8×2.6×2.8
oxylead-AO-220A | 218.7 | 2561 | 260 |

Main Technical Performance of the System
◇ This product is designed, manufactured, installed, tested, and inspected in accordance with the industry standard JB/T 6427-2001 “Pressure Swing Adsorption Equipment for Oxygen and Nitrogen Production” ； ◇ The unit is supplied in skid-mounted form; the installation conditions at the user’s site require that the installation area be clean and level, with easy access for cranes or forklifts to carry out the installation ； ◇ The system operates at normal temperature and low pressure, and it is intrinsically safe. ◇ The system is designed for indoor use, with a maximum temperature of ≤40°C, a minimum temperature of ≥-10°C, and an altitude of ≤500m. Other atmospheric requirements and air quality standards must comply with those specified in industry standard JB/T 6427-2001. For special operating environments, prior consultation is required, and the system can be designed to meet specific conditions. ◇ The system is designed to operate for at least 330 days per year, capable of running continuously 24 hours a day, with the ability to start and stop at any time. ◇ The oxygen outlet pressure of the product is 0.3–0.55 Mpa, and this pressure can be increased as needed. ◇ The compressor starts up within 40 minutes of reaching the specified technical parameters. ◇ The dew point of the oxygen output is -55°C. ◇ Noise levels are measured in accordance with GB/T 4980, and they must meet the requirements of GB 12348. ◇ The system’s power supply complies with the standards specified in JB/T 6427-2001. ◇ The instrument air for the system is provided separately, and it must meet the requirements of GB/T 4830. ◇ There is no consumption of cooling water; if necessary, it complies with the standards specified in JB/T 6427-2001. ◇ The packaging meets the general technical requirements for packaging of mechanical and electrical products as specified in GBT13384-92. ◇ The accompanying documentation also complies with the standards specified in JB/T 6427-2001. Standard functions of the system include: ◇ Automatic and centralized drainage of condensate from the refrigeration dryer and filters. ◇ An independent supply of instrument air. ◇ Valves are controlled automatically by a programmable controller. ◇ Online monitoring of oxygen purity and flow rate. ◇ Audio and visual alarms for faulty gas. ◇ Remote control and communication interfaces (RS232 or RS485). Last edited by chc1125 on 2009-3-18 13:07