These three aspects require everyone's attention in the use of liquid nitrogen plant

These three aspects require everyone's attention in the use of liquid nitrogen plant
The adsorption of molecular sieve to oxygen reaches equilibrium. According to the characteristic that carbon molecular sieve has different adsorption capacity for adsorbed gas under different pressures, the pressure drop makes carbon molecular sieve exempt from oxygen adsorption. This process is regeneration. According to the difference in regeneration pressure, it can be divided into vacuum regeneration and normal pressure regeneration. Atmospheric pressure regeneration is conducive to the complete regeneration of molecular sieve, easy to obtain high-purity gas.
A certain flow rate of liquid nitrogen plant, the purity of ordinary nitrogen and nitrogen enter the set-up arrangement together, after enough mixing in the mixer, enter the set-up arrangement equipped with a palladium catalyst deaerator, 2H2+ occurs under the results of the deoxygenation catalyst The chemical reaction of O2=2H2O reaches the purpose of deoxygenation. After deoxygenation, the water vapor in the nitrogen gas is dehydrated from the beginning to the end of the cooler, and then the nitrogen gas enters the monotone monotonously, so that the dew point of the nitrogen gas reaches about -60 ℃. The monotonizer full of water vapor is regenerated to prepare for the next cycle of adsorption work. After the monotonic nitrogen dust filter removes dust, the result is high-purity nitrogen.
When using liquid nitrogen plant, we must pay attention to the conditions of the applicable environment, which will affect the operation quality of the equipment, so we should pay attention to when handling. So what conditions should be paid attention to when working The following editors will introduce you:
1. Switching directionality: The original switching device can not see the specific switching direction on the outside, and only through the display on the touch screen can we determine which drying tower is online and which drying tower is regenerating. After the upgrade, there are pointing coordinates outside the adjustment controller, which can directly determine the online drying tower and the regeneration drying tower, but the installation of liquid nitrogen plant needs to set the initial position in accordance with the opening direction of the regulator and the four-way valve.
2. Switching time: The original motor switching is instantaneous switching, and the action is fast. It takes 150 seconds to switch after the upgrade, which is longer than the original motor, but the switching is smooth and the system pressure will not cause excessive fluctuations. After the upgrade, the opening time of the solenoid valve should be reset, otherwise it will be opened once during the switching process, and the pressure protection will be turned off instantly, but it is also easy to cause the system outlet pressure to drop, and it is easy to cause the lower equipment to trip.
3. System protection: After the upgrade, the original protection must still exist, that is, pressure protection. When the pressure difference between the online drying tower and the system is greater than 17 PSI, it will not be switched. The drying system will repeatedly press, so that the pressure value of the online drying tower is infinitely close to the system pressure value, at least less than 17 psi.