Radiant syngas cooler

Figure 4.11. Schematic of typical GE gasification system with radiant syngas cooler.

The fouling factors in the waste heat boiler (radiant syngas cooler) were not as severe as predicted. Consequently, heat recovery was more efficient and the syngas was cooled to about 700 °F—a much lower temperature than expected. A temperature of at least 900 °F is needed for the HGCU. 

Figure 11.23. Energy conversion and distribution in a typical IGCC process. RSC, radiant syngas cooler. See color insert.

Further enhancements include refractory development to decrease wear rates, burner development to increase carbon conversion, and the reduction of height (reduction in length of the radiant syngas cooler and introduction of a lockhop-per-free slag water depressurization system) to decrease the capital costs of the... 

The final choice that we will consider is that of syngas cooling. Here one can select between water quench, gas quench, and radiant cooling together with or without a convective cooler. GE, for instance, offer a choice between a full water quench and (for coal gasification) a radiant cooler. 

Figure 4.6 Schematic overview of several syngas cooling methods (GE configurations Q - full water quench, R - radiant cooler and partial water quench, RC - radiant and convective cooler).

Figure 8.2 Exergetic analysis of different gas cooling methods for 500 MW Pittsburgh No. 8 (Pitt 8) coal entrained-flow gasifiers (a) full water quench (Siemens), (b) chemical quench (E-

---