Oxygen generators are a type of machine for making oxygen. The principle is to use air separation technology. First, the air is compressed at a high density, and the condensation point of each component in the air is used to perform gas-liquid separation at a certain temperature, and further rectification is obtained.
PSA oxygen generators are favored by users because of their remarkable advantages. They are widely used in metallurgical combustion, chemical, environmental protection, building materials, light industry, medical, aquaculture, biotechnology, sewage treatment and other fields.
After the air is compressed by the air compressor, after dedusting, degreasing and drying, it enters the air storage tank, enters the left adsorption tower through the air intake valve and the left intake valve, the tower pressure rises, and the nitrogen molecules in the compressed air are zeolite. The molecular sieve adsorbs, the unadsorbed oxygen passes through the adsorption bed, and enters the oxygen storage tank through the left gas production valve and the oxygen gas production valve. This process is called left suction and lasts for several tens of seconds. After the left suction process, the left adsorption tower and the right adsorption tower are connected through a pressure equalization valve to equalize the pressure of the two towers. This process is called equalization and lasts for 3 to 5 seconds. After the pressure equalization, the compressed air enters the right adsorption tower through the air intake valve and the right intake valve. The nitrogen molecules in the compressed air are adsorbed by the zeolite molecular sieve, and the enriched oxygen enters the oxygen storage through the right gas production valve and the oxygen gas production valve. The can, this process is called right suction and lasts for tens of seconds. At the same time, the oxygen adsorbed by the zeolite molecular sieve in the left adsorption tower is released into the atmosphere through the left exhaust valve, which is called desorption. On the contrary, when the left tower is adsorbed, the right tower is also desorbed. In order to completely discharge the nitrogen released by the pressure reduction in the molecular sieve to the atmosphere, the oxygen is purged through a normally open backflushing valve to the desorbing adsorption tower, and the nitrogen in the tower is blown out of the adsorption tower. This process is called backflushing, which is done simultaneously with desorption. After the right suction is completed, the pressure equalization process is entered, and then the left suction process is switched to continue the process to continuously produce high purity product oxygen.
The working process of the oxygen generator is controlled by a programmable controller to control five two-position five-way first conductive magnetic valves, and then the solenoid valves respectively control the opening and closing of ten pneumatic pipeline valves. The five two-position five-way first conductive magnetic valves respectively control the left suction, the pressure equalization, and the right suction state. The time flow of left suction, pressure equalization, and right suction has been stored in the programmable controller. In the power-off state, the pilot gases of the five two-position five-way first conductive magnetic valves are connected to the closing port of the pneumatic pipeline valve. When the flow is in the left suction state, the solenoid valve for controlling the left suction is energized, and the pilot gas is connected to the left suction valve, the left suction valve, and the right exhaust valve opening port, so that the three valves are opened to complete the left suction process. At the same time, the right adsorption tower desorbs. When the process is in the pressure equalization state, the solenoid valve that controls the equalization is energized, and the other valves are closed; the pilot gas is connected to the opening of the pressure equalization valve, so that the valve is opened to complete the pressure equalization process. When the flow is in the right suction state, the solenoid valve for controlling the right suction is energized, and the pilot gas is connected to the right suction valve, the right suction valve, and the left exhaust valve opening port, so that the three valves are opened, and the right suction process is completed. At the same time, the left adsorption tower desorbs. In each process, all valves except the one that should be opened should be closed.