Complex iron desulfurization technology is a type of chelated iron
wet oxidation desulfurization technology, similar to the LO-CAT
sulfur recovery technology. This process adopts a one-step method
to directly convert H2S into elemental sulfur, which has the
characteristics of simple process, fast desulfurization reaction
speed, large operational flexibility, high desulfurization
accuracy, fewer side reactions, low alkali consumption, and no
desulfurization waste liquid discharge.The basic principle of chelated iron desulfurization is that under
weak alkaline conditions of desulfurization solution pH=7.5-9, the
QRP value of Fe3+(L) is moderate. In the desulfurization absorption
tower, Fe3+(L) can only oxidize HS - (L) into elemental S, and the
homogeneous reaction rate is fast. Basically, it eliminates the
opportunity for HS - (L) to enter the regeneration device and
directly contact O2, resulting in high selectivity for generating
elemental sulfur and low rate of secondary salt generation during
the desulfurization process; And Fe2+(L) is oxidized by O2 in the
regeneration device to Fe3+(L), while releasing OH -, achieving a
desulfurization regeneration cycle.
The complex iron products produced by our company are mainly used
in industries such as biogas engineering, natural gas, coal
chemical industry, and organic wastewater treatment.
At present, the company has made achievements in animal husbandry
biogas engineering, kitchen waste treatment engineering, and high
concentration organic wastewater treatment engineering.
Biological desulfurization, also known as biocatalytic
desulfurization (BDS): Biological desulfurization is widely used in
industries that can produce biogas, such as aquaculture, landfill,
brewing, papermaking, citric acid, pharmaceuticals, starch, food,
petrochemicals, etc. It has low operating costs, modular system
equipment, and service support.