Safety precautions to be followed during the test run of the laboratory nitrogen generator

The diffusion rate of oxygen and nitrogen gas molecules on the surface of the molecular sieve is different. The gas molecule with a smaller diameter (O2) has a faster diffusion rate, and more enters the micropores of the carbon molecular sieve, and the gas molecule with a larger diameter (N2) has a diffusion rate. It is slower and enters less pores of the carbon molecular sieve. The use of carbon molecular sieve for the selective adsorption difference of nitrogen and oxygen leads to the enrichment of oxygen in the adsorption phase and nitrogen in the gas phase within a short period of time, so that oxygen and nitrogen are separated, and the gas-phase enrichment nitrogen is obtained under PSA conditions.
The laboratory nitrogen generator is a necessary refrigeration machine for animal husbandry production. Its safe operation is very important for the production of liquid nitrogen and the preservation of frozen semen. Although its degree of automation is relatively high, it can be adjusted for the first generation of production parameters, such as pressure, Handu, flow rate, inlet location, and liquid level. It is automatically maintained within the necessary optimization range for cattle production, but there will still be some failures that are difficult to top during production and use: as a technical operator, accurately and timely analyze and judge, troubleshoot, and maintain the smooth operation of machinery and equipment. Production continues , There is sufficient liquid nitrogen for the beginning. Is very important.
We all know that the laboratory nitrogen generator is a simple plug-and-play liquid nitrogen equipment that combines helium compression and expansion to obtain cryogenic cooling. Built-in oil-free air compressor, PSA pressure swing adsorption nitrogen generator, refrigerator, helium compressor and Dewar tank, and controlled by a color touch screen, it can run fully automatically with one button. Of course, we must pay attention to some matters during the use, especially the safety precautions of the liquid nitrogen generator during the test run.
Under normal pressure, the temperature of liquid nitrogen is -196°C; 1 cubic meter of liquid nitrogen can expand to 696 cubic meters of pure gaseous nitrogen at 21°C. Liquid nitrogen is a colorless, odorless, liquid and gas at low temperature under high pressure. Liquid nitrogen (often written as LN2) is a liquid form of nitrogen formed at low temperatures. Nitrogen has a boiling point of -196°C, and liquid nitrogen will form if the temperature is below this under normal atmospheric pressure; if it is pressurized, liquid nitrogen can be obtained at a higher temperature.
The waterway in the water cooler has scale deposits, which can directly affect the compression heat generated when the working fluid is compressed to the cooling water, which cannot be taken away by the cooling water in time, which reduces the cooling effect of the water cooler and destroys the theory On the isothermal compression process. Since the heat of compression cannot be effectively transferred in time, it affects the cold-to-heat conversion of the regenerator, resulting in a decrease in nitrogen production. At the same time, because too much oil and water accumulate in the cold accumulator, the power consumption of the motor will increase and the motor will generate heat. In this regard, the water cooler can be removed for descaling and cleaning to restore the heat transfer efficiency. Method Use a hydrochloric acid solution to remove scale. Pour the prepared hydrochloric acid solution into the water cooler, stop the coin, and when you see the yellow scale detached, rinse with clean water. If there is any scale, the automatic liquid nitrogen machine can be continuously rinsed with the above method until it is clean. At the same time, the cold storage and oil cooler are also cleaned.