Some IGCC power stations have also been established in petrochemical
enterprises. They use cheap residue oil, pitch, petrocoke or orimulsion as
feedstocks to produce syngas. Syngas can either be used as raw materials
for production of value–added chemicals or to provide electrical power and
steam for the production processes. This makes the production of electricity
and heat closely incorporated with chemical production processes and
decreases the costs for both chemicals and electricity. Up to now, tens
of such facilities have been put into operation all over the world, and more
are under development. One typical example is the facility in Italian ISAB
Company with a power output of 512 MW.
The above examples show that, many developed countries are seeking
the efficient solutions to resource shortage and environment pollution
problems. However, due to the traditional separation of different sectors,
every sector is looking for optimal solutions in its own field. Actually,
these optimal solutions can hardly be the best as the society is concerned
as a whole. Polygeneration is intended to be a highly flexible and optimal
integrated resources, energy and environment system from the angle of
whole society and breaking up the existing separation of different sectors.
The Framework of Polygeneration System Based on Oxygen Blown
Gasification.
The polygeneration system is proposed from the point of view
of comprehensive optimization, which is a highly flexible and cross-sector
integrated system of resources, energy and environment. Fig. 3 is its basic
framework. The main points are:
1. Using coal, petrocoke or heavy oil residues with high sulfur content as
feedstock, syngas (main contents are CO+H
2
)
is produced through oxygen
Fig. 3. Integrated system for resource, energy and environment
ISSN 0236-3941. Вестник МГТУ им. Н.Э. Баумана. Сер. “Машиностроение”. 2006. № 1 113
