Potential Applications of High Temperature Air Combustion Technology to Other Systems - High Temperature Air Combustion: From Energy Conservation to Pollution Reduction - page 347

FIGURE 6.5 A schematic diagram of high temperature w aste gasification and industrial gas

turbine system.

Product

Raw
Material

Steam

Waste Syngas

Boiler or
Power
Generator

Gasification
of Waste

Production
Facility

Energy Electricity

High
Temp. Air

High Temp.

Slag (Useful for road
bed construction)

FIGURE 6.6 Prospects for future ultra-lo w waste generation from a production facility.

P art of the energy in the syngas may be used for high temperature air/steam pre-

heating and the remainder may be used for power generation, steam generation, and
industrial heating. With a proper design various undesirable constituents in the waste
can be recovered, such as heavy metals (Fe, Cu, Al), inorganic compounds in the
form of nonleachable slag, and sulfur and chlorine.

The proof of concept for the
overall process shown in Figure 6.7 requires validation. The main features of this
waste-to-energy conversion are as follows:

5

1. Conversion of solid wastes and low grade fuels (including coals and high-
moisture-containing municipal and industrial wastes) to clean gaseous fuels
having low to medium calorific value. The composition of the gaseous fuel
can be adjusted via some control of the chemistry, e.g., gasification, pyrol-
ysis, or reforming of the waste with steam and high temperature air, thus
increasing the calorific value of the gases produced.