| Abstract: | Feeding systems for pressure vessels – concepts and realization . Feeding systems are required to introduce solid materials into pressurised vessels. The systems consist of the feeder itself, related machinery and control devices. In this paper commercially proven systems are presented as well as those currently under development. Subsystems, such as valves or dosing facilities, are also dealt with. For assessment of the different systems, criteria are named which are related to important requirements in the operation of a system. The specific power consumption of various systems is also evaluated. The assessments show that the lock hopper system seems to have the widest scope, as borne out by the use of this system in most of the commerical and pilot plants for the gasification or combustion of coal under pressure. Should recent developments aimed at the reduction of vent gas losses prove successful, then the lock hopper system will be even more attractive. |
