Pressure swing adsorption nitrogen making machine (referred to as PSA nitrogen making machine) is designed and manufactured according to PSA technology. Usually high purity nitrogen plant using two adsorption tower in parallel, by automatic control system according to specific programmable strictly control the timing, alternating pressure adsorption and decompression regeneration, complete separation of nitrogen and oxygen, to obtain the required high purity nitrogen.
Effect
Using air as raw material, l uses physical method to separate oxygen and nitrogen.
There are three kinds of industry, namely the cryogenic air separation method, molecular sieve method (PSA) and membrane air separation method.
Species introduction
Nitrogen machine must have a lot of people are used, but the nitrogen machine operation process of specific certain many people do not know, we high purity nitrogen machine is nitrogen machine operation process, especially the process safety. When the compressed air source pressure reach to 0.7MPa, open the nitrogen total import cut-off valve, pneumatic valve pressure regulating valve of the working gas source to 0.4-0.5Mpa; maintenance work before the closure of nitrogen, the nitrogen outlet valve and a sampling valve, turn off the power switch nitrogen machine. Note that the two adsorption tank pressure and pneumatic valve action is normal. System and pressure relief pipe must complete; exhaust system for oxygen enrichment, pay attention to fire safety, indoor air flow distribution; regulating oxygen analyzer sampling valve pressure will be adjusted to 1.0bar, adjust the sample volume to the meter, at around 1, sampling volume should not be too much attention. Nitrogen purity test. Timing discharge discharge valve in air compressor operation. Clockwise turn the power switch PLC nitrogen machine station on the electrical cabinet. The upper limit of oxygen content is set on the oxygen analyzer of the nitrogen making machine control cabinet. According to the pressure change of the two adsorption towers to determine whether the two adsorption tower is normal, the pressure of the regeneration tower is zero, and the pressure of the two tower should be close to half of the original working tower pressure. Must close all parts of the whole system and the system; nitrogen adsorption tank pressure reaches about 0.6MPa, to observe the nitrogen system is working properly, turn on the power switch oxygen measuring instrument, and adjust the sample flow amount of the observed oxygen content. According to the needs of the purity of nitrogen to adjust the purity of the valve opening, after the purity of the automatic switching into the nitrogen tank, nitrogen storage tank nitrogen pressure is generally 0.6 - 0.8MPa. Before the maintenance work, pay attention to whether the oxygen content of the oxygen meter is consistent with the requirements. The purity and flow rate of nitrogen is adjusted by adjusting the opening of the outlet valve. Slowly open the vent outlet valve to regulate the flow to the rated flow rate of 1/2. When the purity of nitrogen to meet the requirements, slowly open the pure gas outlet valve, will flow to the required flow, close the vent outlet valve, the normal operation of equipment can be put into use. Turn the air compressor knob to the no-load, and then turn off the air compressor after running for 2 minutes. The lower part of the air cushion tank opens the oil in the tank. The air compressor can be judged according to the pressure change of the two adsorption tanks, and after the pressure of the compressed air buffer tank reaches more than 0.8MPa, the nitrogen switch of the control cabinet is opened.
