International Survey of the Status of Technology of Critical Components for Coal-Liquefaction Processes

摘要

The subject survey considers three categories of components: slurry letdown valves, slurry pumps, and heat-transfer equipment (slurry preheaters and exchangers and gasifier waste-heat boilers). We concluded that foreign technology is similar to US technology and that both foreign and domestic manufacturers are hindered by: (1) a lack of adequate design correlations partially because of proprietary restrictions; and (2) uncertainties in demonstration and commercialization schedules. Solutions to slurry letdown valve and slurry pump problems, which are only now being developed in the United States, were used as far back as the 1940s in German liquefaction plants and today are being incorporated into equipment selected and installed in several foreign pilot plants.