Liquefied air method is a physical process, which pressurizes air to a liquefied state, and then separates liquid air into nitrogen and liquid oxygen by controlling different temperatures and pressures. The main advantages of this method are simplicity, high efficiency, energy saving and no chemical substances. Liquid oxygen is a common oxygen source in industry, which can be directly used in metal cutting, welding, flame processing, glass manufacturing and so on.
The method of separating liquid air is a large-scale production method, which liquefies the air by pressurizing it to a pressure exceeding its liquefaction point, and then divides the liquid air into nitrogen and oxygen by controlling the temperature difference. This process is physical, and there is no chemical reaction. The advantages of liquid air separation method are mature technology, simple equipment and low investment cost.
Matters needing attention in oxygen production:
1. Safety: Pay attention to safety during oxygen production to avoid oxygen leakage or other safety accidents. Therefore, we must strictly control the quality and operating procedures of the equipment to ensure that the sealing and safety of the equipment meet the standards. In addition, regular inspection and maintenance should be carried out to ensure the normal operation of the equipment.
2. Purity control: For the industrial production of oxygen, the control of oxygen purity is very important. Different application scenarios have different requirements for oxygen purity. For example, medical and aviation fields require higher oxygen purity, while industrial production requires lower oxygen purity. Therefore, in the process of oxygen production, it is necessary to control the purity of oxygen according to different application scenarios to meet different needs.
3. Energy consumption control: oxygen production needs to consume a lot of energy, so energy control is very important. In actual production, energy consumption can be reduced by optimizing the technological process and selecting efficient and energy-saving equipment. In addition, energy consumption can be reduced by improving oxygen purity and recycling.
4. Environmental protection: In the process of oxygen production, we should pay attention to environmental protection. Industrial oxygen production will produce a lot of waste gas and wastewater, which will pollute the environment if it is not handled properly. Therefore, it is necessary to properly treat and reuse the waste gas and wastewater from industrial oxygen production to reduce the impact on the environment.