oxygen generator industrial process flow
The process flow of pressure swing adsorption (PSA) oxygen production is developed on the basis of Skarstrom cycle [8] and G-D cycle. The main features of the basic pressure swing adsorption (PSA) oxygen production process are pressure adsorption and pressure reduction flushing regeneration. The main equipment of the typical two-bed pressure swing adsorption oxygen production process includes: 1. Inlet filter 2. Inlet fan 3. Two adsorption towers 3A/3B, buffer tank 4. Several valves (V1-V7) and related computer automatic control systems.
The PSA process cycle includes four basic cycle steps: pressure increase adsorption, pressure equalization, pressure reduction desorption, and purge:
(1) Pressure increase adsorption: Raw air with a certain pressure enters the air inlet of the adsorption tower, the pressure in the tower begins to rise, the air is fully in contact with the oxygen molecular sieve in the tower, nitrogen is adsorbed, and oxygen is rarely adsorbed and enriched and flows out from the air outlet of the adsorption tower.
(2) Pressure equalization: After the oxygen-generating molecular sieve in adsorption tower A is saturated with nitrogen, it stops adsorption and is connected to adsorption tower B which has been flushed. The high-pressure gas in adsorption tower A flows into adsorption tower B until the pressure of the two adsorption towers reaches a basic balance, and the gas and energy in adsorption tower A are effectively utilized.
(3) Pressure reduction and desorption: After pressure equalization, adsorption tower A is depressurized and the gas in the adsorption tower is directly discharged into the atmosphere, desorbing most of the nitrogen adsorbed by the oxygen-generating molecular sieve, regenerating the molecular sieve and realizing the recycling of the molecular sieve.
(4) Purge: The oxygen-rich gas flowing out from the top of adsorption tower B is used to backwash and clean adsorption tower A after desorption to remove residual nitrogen, further improve the desorption effect, and improve the regeneration effect of the oxygen-generating molecular sieve in the adsorption tower, thereby improving the adsorption capacity of the regenerated oxygen-generating molecular sieve.
Research content of NEWTEK PSA oxygen production
Since its emergence in the 1960s, PSA oxygen production process has been widely used for its advantages such as short construction period, low energy consumption, low operation and maintenance costs, high degree of automation, convenient start and stop, high operational flexibility, mild process conditions (normal temperature, low pressure), simple process flow and high safety. However, in actual applications, PSA oxygen production industrial units have the phenomenon of molecular sieve powdering, loss, and oxygen purity and output decreasing with the increase of the service life of the unit. At the same time, compared with the cryogenic distillation oxygen production unit, the smaller oxygen production scale of PSA oxygen production unit has also become an important factor limiting its wider application. In addition, since the oxygen-argon separation coefficient of zeolite molecular sieves that have been widely used in the current industry is generally not high enough, the PSA oxygen production units currently used in the industry generally cannot produce oxygen with a purity of more than 95%, which also limits the application of PSA oxygen production units in the field of high-purity oxygen demand. In view of the above problems and constraints in the application of PSA oxygen production process, NEWTEK's research on PSA oxygen production process mainly focuses on three aspects:
(1) Research and development and production of molecular sieves with better stability, lower price and higher oxygen-nitrogen separation coefficient.
(2) Design and manufacture of adsorbers with higher performance and better performance of molecular sieves to achieve oxygen-nitrogen separation.
(3) Development and optimization of process flow and process control with lower energy consumption and more stable operation. At present, Li-LSX molecular sieves are relatively mature and common as adsorbents for PSA oxygen production. At the same time, the adsorbers (or towers) used in PSA oxygen production devices have also been deeply studied, designed and manufactured as large radial flow adsorbers and have been actually applied in large-scale PSA oxygen production devices. Therefore, the process theory research and process control optimization of PSA oxygen production process have become the hottest research directions in the field of PSA oxygen production. At the same time, under the existing production and application level of industrial adsorbents and adsorbers, process control and optimization of pressure swing adsorption oxygen production process have become the most important factors affecting oxygen output, oxygen purity and oxygen production energy consumption. In addition, process flow and process control, as the decisive conditions for the regulation and control of pressure swing adsorption oxygen production equipment, are also the main ways to improve the stability, reliability and intelligence of oxygen production equipment.
Hot Tags: oxygen generator industrial, China oxygen generator industrial manufacturers, suppliers, industrial oxygen generator, industrial psa oxygen generator, Oxygen Generator Industrial, oxygene generator industrial, industrial psa oxygen generator plant, PSA Oxygen Generator for Industrial Use
