This article will introduce in detail the methods used to produce nitrogen, including distillation, compressed air, and separated air. With these methods, pure nitrogen can be efficiently produced for use in a variety of industrial and laboratory applications.
1. Distillation method to produce nitrogen.
Distillation is a commonly used method for producing nitrogen. This method takes advantage of the difference in the boiling points of nitrogen and oxygen in liquid air to separate pure nitrogen by fractionation.
1.Preparation of equipment: In order to carry out distillation and nitrogen production, we need to prepare a distillation equipment, including a distillation column, heating equipment, cooling equipment and collector. At the same time, oxygen and liquid air are also required as raw materials.
2.Separation of oxygen: First, liquid air is injected into the distillation column and heated. Liquid air contains nitrogen and oxygen, and at the right temperature, oxygen is converted into gas before nitrogen enters the top of the distillation column.
3.Gas fractionation: After oxygen enters the distillation column, it will mix with the evaporated liquid air, and after a series of cooling equipment, the oxygen will gradually condense into a liquid and flow out from the bottom to form an oxygen collector.
4.Collection of Pure Nitrogen: After the process of gas fractionation, the top of the distillation column will produce pure nitrogen, which is piped into another collector.
2. Nitrogen production by compressed air method.
The compressed air method is another commonly used method for producing nitrogen. This method uses the different filtration rates of oxygen and nitrogen in compressed air to separate nitrogen and oxygen to obtain pure nitrogen.
1.Preparation of equipment: The production of nitrogen using this method requires the preparation of a compressed air machine, cooler, nitrogen generator and collector.
2.Compressed air: First, the air is compressed through a compressed air machine to increase the content of oxygen and nitrogen.
3.Gas separation: The compressed air enters the cooler for cooling, and the cooled air enters the nitrogen generator. A special molecular sieve is used in the nitrogen generator that separates the nitrogen gas according to the size and shape of the gas molecules, so that the nitrogen is filtered faster than the oxygen.
4.Pure nitrogen collection: After the separation process, the pure nitrogen is collected by the collector.
3. Nitrogen is produced by separating air method.
The separation air method is one of the commonly used methods for the production of large-scale nitrogen. The method uses equipment such as molecular sieves and coolers to separate nitrogen and oxygen in the air to obtain pure nitrogen.
1.Preparation of equipment: The preparation of nitrogen using this method requires the preparation of a separation air device, including a molecular sieve, a cooler, a nozzle and a collector.
2.Air adsorption: First, air is fed into the molecular sieve through the nozzle, which can selectively adsorb oxygen and separate nitrogen according to the different sizes and shapes of gas molecules.
3.Gas cooling: The separated nitrogen enters the cooler, and after cooling, the nitrogen will gradually condense into a liquid and be collected through the collector.
4.Pure nitrogen**: The liquid nitrogen collected by the collector is again passed through the heat exchanger to obtain high-purity nitrogen.
Summary: High purity nitrogen can be produced by distillation, compressed air and separated air methods. Each method has its own advantages and scope of application, and the appropriate method for nitrogen production can be selected according to actual needs.
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