DEAR Biogas purification unit.Shorten the adsorption cycle to ensure the work within the allowable range of adsorption capacity; pay attention to monitor the carbon dioxide content in the air at the outlet of the adsorber below 1 × 10-6. At the same time, reduce the product nitrogen flow properly, increase the nitrogen flow of decontamination nitrogen cooling tower to reduce the temperature of cooling water as much as possible, and increase the flow of common cooling water.DEAR Biogas purification unit.Since the argon content in the air is constant, the argon content in the stripping section will decrease and the argon content in the distillation section will increase correspondingly. If the nitrogen production decreases, the nitrogen concentration will increase, and the argon rich section will move down. That is to say, the argon content in the argon rich region of the distillation section should be reduced, and the argon content in the argon rich region of the stripping section should be increased.
DEAR Biogas purification unit.In the rectifying tower, the steam with higher temperature and the liquid with lower temperature contact each other continuously, the nitrogen in the liquid evaporates more and the oxygen in the gas condenses more, so that the nitrogen content in the rising steam increases continuously and the oxygen content in the downstream liquid increases continuously, so as to realize the air-gas separation.DEAR Biogas purification unit.The main ignition sources are: 1) the solid particles of explosive impurities rub against each other or against the wall; 2) electrostatic discharge. When there are a small amount of ice particles and solid carbon dioxide in liquid oxygen, static charge will be generated. When the content of carbon dioxide is 2 × 10-4 ~ 3 × 10-4, the electrostatic potential can reach 3000V.DEAR Biogas purification unit.During the shutdown of air compressor, the outlet and inlet valves of cooling water shall be closed. After start-up, the accumulated water in the pipeline should be blown away. When the cooler leaks seriously, it should be stopped for maintenance or replacement; third, the heating gas must be dry.
In production, the purity of oxygen, nitrogen and argon are required to be not less than 99.5%, 99.99% and 99.999%, respectively. These indicators indicate the content of main substances in the product. Because it is very difficult for the product to be absolutely pure, there are more or less impurities, so the degree of purity is called purity.DEAR Biogas purification unit.There is water in the pipe and it cracks. When the heating is not complete, especially when the small pipe is blocked and the accumulated water can not be blown away, the small pipe may freeze and crack when the water at low temperature freezes into ice and the volume expands. There was a slight local explosion in the main cooler.DEAR Biogas purification unit.In the pressurization stage, the purifier is filled with air, and the pressure in the purifier increases. Because the impurities, moisture, carbon dioxide and acetylene in the air are adsorbed by the adsorption bed, the temperature will rise, and the air outlet temperature will generally rise by 2 ~ 4 ℃.
