Industrial Process Solutions Inc.
GASIFICATION TECHNOLOGICAL PROCESSING IN WILKESBORO, NORTH CAROLINA, AND EAST OF THE MISSISSIPPI
WHAT IS THE BG 30 SUBLIMATOR?
The BG 30 Sublimator is a plant that converts organic residues such as straw, manure, etc. into flammable gases, where methane makes up the majority.
The feedstock must be delivered grinded/shredded or as pellets.
The process may be looked upon as taking place in the following steps:
1. A screw conveyor transports the feedstock into the unit.
2. The feedstock is transported through a pre-heating pipe by a screw conveyor and is heated to above 100 ºC. Hereby, the water evaporates from the raw material.
3. The dried feedstock is compressed by a compression screw. Hereby, air is driven out of the material. Furthermore, nitrogen is supplied in order to build up an inert atmosphere.
4. The compressed feedstock enters the retort. The temperature here is above 650 ºC. The retort consists of to pipes with screw conveyors.
5. The produced gas escapes through a pipe from the upper part of the retort. The pipe has an outlet, where gas can be sampled for analyses.
A minor part (approximately 10 %) of the produced gas is used for operation of the unit. In order to start up the system, natural gas must be supplied until enough gas has been produced to operate the unit.
6. The remaining material (biochar) is removed from the unit by a screw conveyor. The signal from a rotary paddle decides if there is enough biochar to start the screw.