Nitrogen system

Abstract

The invention discloses a nitrogen system which comprises a buffer tank, a PSA nitrogen generation system and a liquid nitrogen vaporization system, wherein the PSA nitrogen generation system is connected in parallel with the liquid nitrogen vaporization system; the PSA nitrogen generation system comprises an air compressor, a PSA nitrogen generator and a supercharger which are sequentially communicated, and a nitrogen outlet of the supercharger is communicated with a nitrogen inlet of the air compressor; the liquid nitrogen vaporization system comprises a liquid nitrogen storage tank for storing liquid nitrogen and a liquid nitrogen vaporizer communicated with the liquid nitrogen storage tank, and a nitrogen outlet of the liquid nitrogen vaporizer is communicated with a nitrogen inlet of the buffer tank; a switching device is arranged among the nitrogen outlet of the supercharger, the nitrogen outlet of the liquid nitrogen vaporizer and the nitrogen inlet of the buffer tank; due to the switching device, the nitrogen inlet of the buffer tank can be only communicated with the nitrogen outlet of the supercharger or the nitrogen outlet of the liquid nitrogen vaporizer. The cost of nitrogen generation can be effectively reduced through the structure design of the nitrogen system.

Description

technical field [0001] The invention relates to the technical field of nitrogen making equipment, and more specifically, relates to a nitrogen system. Background technique [0002] At present, there are generally two systems for producing nitrogen in rubber tire enterprises, one of which is the PSA (Pressure Swing Adsorption, pressure swing adsorption) nitrogen production system, such as figure 1 As shown, it includes an air compressor 01, a PSA nitrogen generator 02, and a booster 03 connected in sequence. When producing nitrogen, firstly, the air compressor 01 prepares compressed air, and then the compressed air enters the PSA nitrogen generator 02. Nitrogen machine 03 separates nitrogen and oxygen through molecular sieves. Under the condition of adsorption kinetics, the diffusion speed of oxygen molecules into the micropores of molecular sieves is much faster than that of nitrogen molecules. Therefore, through proper control, the time away from equilibrium conditions Ins...

AI Technical Summary

Problems solved by technology

Among them, the PSA nitrogen production system has high production efficiency, but its air compressor consumes a lot of power. When some industrial areas implement time-of-use electricity prices, the PSA nitrogen production system is used for nitrogen production during the time period when the electricity price is relatively high. Consumes more electricity, correspondingly increases the cost of nitrogen production

The liquid nitrogen vaporization system needs to purchase liquid nitrogen from the outside world, which also makes the cost of nitrogen production higher

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