The oxygen-enriched air separation
technology has more obvious advantages in industries such as iron and steel,
non-ferrous smelting, environmental protection, papermaking, and emerging
biomass power generation and oxygen-rich power generation. Compared with the
traditional cryogenic air separation process, the oxygen-enriched combustion
air separation system has the characteristics of large oxygen demand, low
pressure, and low oxygen purity. Therefore, developing a new type of low energy
consumption air separation process with high efficiency, energy saving and high
added value has become a new hot spot in the air separation industry.
Chinllenge Gas Group and Xi'an Jiaotong
University's School of Energy recently conducted an IAR（Industry-Academia-Research) cooperation on low-energy-consumption
air separation technology, and exchanged analysis on oxygen purity, pressure,
process form, and energy consumption level of low-energy-consumption air
separation.
I. General Process
The rectification column of the
conventional process is composed of a condensing evaporator between a lower
column, an upper column, and an upper and lower column. In order to ensure the
heat transfer temperature difference between the gas nitrogen at the top of the
lower tower and the liquid oxygen at the bottom of the upper tower in the
condensing evaporator, the air compressor must compress the entire air to 0.5 ~
0.6 MPa. Therefore, the energy consumption of the traditional double tower
process is high, but The parts are relatively few, and double-height products
can be made at the same time, so the application is more common.
Second, low energy consumption process
After the air is compressed and purified,
the process air exiting the purification system is divided into several paths,
and rectification and coupling are performed in each section.
After technical exchanges with Xi'an
Jiaotong University and Aspen process simulation, the characteristics of the
low energy consumption air separation process are calculated as follows:
1. Low energy consumption air separation
process has more than 10% lower energy consumption than traditional air
separation process under the same conditions;
2. Low energy consumption air separation
process can take into account the production of pure oxygen products.
Chinllenge Gas Group has been awarded the
title of high-tech enterprise since 2007. The group company has invested a lot
of resources in scientific research. After many years of hard work and
accumulation, the group headquarters has established a gas plant overall
solution technology center and industrial gas equipment engineering technology.
R & D Center. Chinllenge Gas Group and the most famous international
cryogenic professional authority-Xi'an Jiaotong University's School of Energy
and Technology have a long-standing long-term strategic cooperation
relationship. The two sides have a shared commitment to the development of
education, training of talents, and joint development Technology, a sense of
responsibility for the benefit of mankind, and a common belief are an important
basis for the two parties to establish long-term cooperation, and at the same
time provide scientific research support and a steady stream of human resources
for the group company. Looking into the future, Chinllenge Gas Group will
further strengthen innovation and synergy, gather the strength of production,
teaching and research, open up a new future for gas development, and welcome
the new chapter of the Group's development with the results of innovation and
practice.