Hi,
I made some sketches about my design-suggestions. Sorry for the modest quality, that are just some first thoughts and I would like to hear your opinion on that.
First, I think of a gasifier close to the Svedlund and Mako S principle. Dwondraft with a central nozzle. After the gasifier, there is a heat exchanger, in which the air is heated and the water from the “carburetor” is turned to steam. After that a combination of heat exchanger and dropbox to heat the air before the caburetor and drop lager particles. Then a cooler, if the gas is still to hot and finally a sack-filter, inspirated by the design of Gohin-Polunec.
Now to some details: I would like to use the “umbrella” Max Gasman suggsted a while ago to prevent the nozzle from sticking deep in the char. The nozzle shuld be rather thick walled, same principle like Kritijan’s Leitinger Nozzle.
I can be with just one central whole in the middle pointing downwards, but I would rather make the second option with the central hole splitting up to three or four holes sidewards to make the reacton zone wider.
The gasifier itself is rather similar to the Svedlund. A moveable grate at the bottom, hearth insulated with ceramic material (blanket or refactory). Hopper with a convenient shape. I would just like to set the lighting port directly above the nozzle, so it can be used for inspection of the nozzle and fire and for poking ash and slag at the nozzle tip with a poking rod.
First heat exchanger/steam generator:
I think of a bunch of pipes sourrounded by a chamber. The hot gas goes through the pipes. The air and water in the chamber. Some baffle plates make the way for the air longer, thus give more surface for preheating it and evaporating the water.
Second heat exchanger for prehaeting air before the water addition in the carburetor and drop box for larger dirt particles.
A larger tube with baffle plates. The gas has to change its direction several times, and the larger particles can settle in the corners of the plates. Plates are mounted on a rod and can be pulled out for cleaning.
Tube has fins on the outside and is surounded by a larger tube. Counterflow of air in the outer gap for prehating.
Filter: Sack-filter similar to Gohin-Poulenc design. Upper covr and lower bucket can be removed for cleaning/maintenance. The sacks can be easily shaken and the dirt falls down in the lower part. Then just empty the lower buket. I hope for less dirty cleaning here.
What do you think? Please let me know your thoughts and suggestions on this sketches.
Regards, Til