高效制氮工艺研究应用

Study and Application of High Efficiency Nitrogen Generating Process

在常规变压吸附制氮的流程上,增加一个废气储罐和废气利用管路,将高压废气收集储存在废气储罐内,再将废气通过管路引向前端的干燥塔,通过高压的废气来反吹干燥塔,利用高压废气含水量低的干燥特性,将干燥塔内的水份带走。利用废气代替常规制氮流程中的干燥空气,减少干燥空气的消耗,这样用于生产氮气的空气就会增加。由于制氮机的能量消耗主要是空气压缩机,在相同空气进气量的情况下,高效制氮工艺的能耗几乎不变,氮气的产量却会增加,进而实现高效、节能的目的。

In the process of conventional pressure swing and nitrogen absorption, an exhausted gas storage tank and pipeline were inserted to collect high pressure exhausted gas and store it in the tank. The high exhausted gas was introduced to drying tower from pipeline to back-flush drying tower so as to use exhausted gas to carry away moisture in the tower. In this way, dry air used in conventional process was replaced by exhausted gas and the consumption of dry air was reduced, with which the amount of air for producing nitrogen was increased. Energy consumption in nitrogen generator comes mainly from air compressor. With the same inlet amount of gas, the energy consumption is almost unchanged in high efficiency nitrogen generating process but nitrogen production is increased. Thus the objective of high efficiency and energy saving has been reached.