Some knowledge points about Pressure Swing Adsorption (PSA) oxygen generation equipment, PSA oxygen generation equipment manufacturers answer your questions

      Pressure swing adsorption (PSA) oxygen equipment manufacturers believe that domesticallyPSA oxygen generation technology has gradually matured and stabilized, but there is still a certain gap compared with foreign PSA oxygen generation technology.Pressure swing adsorption (PSA) oxygen equipmentis a systematic project. Oxygen production not only requires high-performance molecular sieves, but the selection of matching power equipment and valves is also a key factor. The supporting equipment of pressure swing adsorption oxygen equipment is analyzed and compared.

　　Pressure swing adsorption (PSA) oxygen equipment manufacturers believe that foreign companies design and manufacturePSA oxygen equipment widely uses Roots blowers, while domestic equipment used centrifugal blowers in the early stages. Centrifugal blowers are constant pressure type, and the flow rate changes with the pressure. Although the flow rate can be adjusted, as long as it deviates from the design advantages, the efficiency will decrease rapidly. Roots blowers are constant volume type, and the flow rate remains basically stable when the pressure changes. The stable flow rate has little effect on the adsorption bed and will not change significantly, which is conducive to molecular sieve adsorption. In addition, the efficiency of Roots blowers is higher than that of centrifugal blowers. It can be seen that domestic and foreignPressure swing adsorption (PSA) oxygen equipmentmanufacturers choose Roots blowers and Roots vacuum pumps as power equipment is based on scientific reasons, and actual operation proves that their energy consumption indicators are also lower.

　　Pressure swing adsorption (PSA) oxygen equipment manufacturers believe that China's large-scalePressure swing adsorption (PSA) oxygen equipmentearly adopted two-stage wet vacuum pumps, using high-pressure ratio technology(pressure ratio > 4). Compared with single-stage wet vacuum pumps, two-stage wet vacuum pumps have the advantages of high negative pressure and low energy consumption, but two-stage wet vacuum pumps also have disadvantages such as high price, large load on the secondary small pump, easy damage to inter-stage check valves, and complex installation. At present, both domestic and foreign manufacturers adopt low-pressure ratio technology. Considering comprehensively, most domestic PSA oxygen equipment adopts single-stage wet vacuum pumps. The vast majority of foreign large-scale vacuum pressure swing adsorption oxygen equipment adopts dry single-stage Roots vacuum pumps, reducing one soft water device.

　　Pressure swing adsorption (PSA) oxygen equipment manufacturers believe that currently, most domestic oxygen equipment adopts"one-to-two" unit configuration, that is, one motor drives the blower and wet vacuum pump to operate simultaneously. The equipment is less, the configuration is reasonable, and the host stability is good. However, domestic blowers and vacuum pumps have lower speeds and larger volumes. Compared with imported high-speed blowers and vacuum pumps, they have a large footprint and low efficiency. Although domestic pressure swing adsorption oxygen equipment has fewer supporting equipment, fewer faults, and relatively easy handling. Generally, the speed of foreign large blowers is 1200r/min, and the vibration speed is 1718mm/s; the speed of domestic large blowers is only 590r/min, and the vibration speed is 11.2mm/s. The mechanical efficiency of foreign blowers and vacuum pumps is higher than that of domestic products.

　　Pressure swing adsorption (PSA) oxygen equipment manufacturers believe that the structural design of the adsorption tower will affect the use effect of the molecular sieve, which is a key factor affecting the stability of product yield and purity. DomesticPressure swing adsorption (PSA) oxygen equipmentadsorption towers generally adopt an axial flow structure. The advantages of the adsorption bed are simple structure and low manufacturing cost. The disadvantages are that the influence of gas inlet and outlet on the bed is relatively large, the dead space of the container is relatively large, the volume of the equipment is also large, and the calculation requirements for gas flow distribution are relatively strict.