Energy saving and environmental protection VPSA Oxygen Generation Equipment｜VPSA Oxygen Generators

Product Scale: 100~10000Nm3/h

Oxygen Purity: ≥70〜94%

Oxygen Pressure: ≤20MPa (able to be pressurized)

Annual Operation Rate: ≥95%

The pressure swing adsorption air separation oxygen generation equipment* s adsorption bed must contain two operation steps like adsorption and desorption. In order to continuously obtain the product gas, the oxygen generation equipment usually has over two adsorption beds. In addition, considering energy consumption and stability, some necessary auxiliary steps are set. Every adsorption bed undergoes adsorption, pressure release, vacuuming or pressure reduction & regeneration, washing & replacement, pressure balancing & pressure increase, and other steps, periodically and repeatedly operated. At the same time, every adsorption bed respectively undergoes different operation steps. Under the PCL control, they are regularly switched so that several adsorption beds may carry out the coordinated operation, staggered in the aspect of time, in order that the pressure swing adsorption equipment can be steadily operated to continuously obtain the product gas. For the actual separation process, it is required to consider other tiny components in the air. The adsorption capacity of carbon dioxide and water on the general adsorbent is much stronger than that of nitrogen and oxygen. The proper adsorbent may be added to the adsorption bed (or the adsorbent for oxygen generation is utilized) so as to carry out adsorption and elimination.

The number of adsorption towers required by the oxygen generation equipment is subject to oxygen generation scale, adsorbent performance, and process design concept. When the multi-tower operation is carried out, the operation stability is relatively better, but the equipment investment is higher. The current tendency is to use the high-efficiency oxygen generation adsorbent to try to reduce the number of adsorption towers, and adopt the short operation period, so as to improve the equipment efficiency and save the investment as much as possible.

The open-hearth furnace process with oxygen blowing is to support the combustion. Its purpose is to strengthen the smelting process, shorten the smelting time and improve the steel output of the open-hearth furnace. The practice has proved that, if the open-hearth furnace process with oxygen blowing is adopted, the steel output of the open hearth furnace may be increased by over 100%, and the fuel consumption may be reduced by 33%〜50%. According to the calculation, the consumption per ton of steel is 30~40m3.

The electric furnace process with oxygen blowing may accelerate the furnace burden fusion and impurity oxidation, which means that the electric furnace process with oxygen blowing can improve the production capacity and enhance the quality. The electric furnace* s consumption per ton of steel varies with smelting steel types. For example, when the carbon structural steel is smelted, the oxygen consumption per ton of steel is 20~25mm3; however, the oxygen consumption per ton of high-alloy steel is 25〜30 m3. The required oxygen concentration is 90%〜94% enriched oxygen.

The blast furnace process with enriched oxygen blowing may observably reduce the coking and improve the output. According to the statistical information, if the oxygen concentration is enhanced by 1%, the iron output may be increased by 4%〜6% and the coking may be reduced by 5%〜6%. Especially, when the coal injection rate of coal-based iron-making water reaches 300kg, the corresponding oxygen consumption per ton of iron is 300m3.

In the smelting process of non-ferrous metals, if the oxygen is added, the sulfur may fully burn, so as to maintain the smelting temperature and improve the smelting speed. Taking copper as an example, using enriched oxygen to smelt the copper may save 50% energy. In other words, under the same fuel consumption condition, the copper output may be increased by 100%.