13
•
Gas Cowling
While inspecting the air lines, use the wire brush to clean any build up along the vessel
walls, and the gas exit port through to the cyclone.
•
Cleaning out Char/Ash from Reactor
The Grate Shaker purges the smaller char/ash particles to maintain proper gas flow
throughout the reaction chamber. Purge the ash/char from underneath the grate by opening the
ash port on the gasifier. The char/ash can be cleaned out with a long rod or a vacuum cleaner.
Be aware that if the charcoal is hot, air allowed into the gasifier may start to light the charcoal.
This high temp char is perfect as the final stage filter media for the Gas Filter. Be sure to
sift out the fine dust, see
Filter Media
.
•
Reduction Bell
Due to high thermal cycling over long run times at high temperatures in a harsh
combustion and a reduction environment, over time the Reduction Bell will need to be checked
for any accumulated damage that may have occurred. If the reactor is run at temperatures over
the maximum operation temperatures, damage to the reduction bell at the restriction or the
bottom of the reduction bell could occur.
Make sure that the reduction bell bolts are securely in place. After many thermal cycles,
these bolts may become lose. If they are lose, use the high temp mortar to screw them back into
place. Loose bolts can allow local combustion to occur and may burn through the air lines at the
bottom of the reactor.
•
Air Nozzles
Because the highest temperatures are experienced at the tip of the air nozzles of any
gasifier system, these will need to be checked for any thermal damage. Check the tip of the
Nozzles to make sure the opening has not enlarged due to melting or corrosion.
•
Cyclone
It is possible for soot and particulates to stick and build-up in the gas lines and cyclone
over time. To maintain the efficiency of the cyclone, detach the cyclone condensate jar and use
a large bottle brush to purge any particulate build up.
•
Cyclone Condensate Jar
The cyclone jar should be emptied if full. Un-thread the jar and empty. When reattaching
the condensate jar, be sure to create a gas tight seal Apply the silicone RTV provided, if needed.
•
Gas Filter
The saw dust or char media used for the bulk of the gas filter media traps any soot, tars,
and condensate in the gas stream before entering the engine. Check the condensate level of the
Gas Filter by looking at the level viewing port at the bottom of the gas filter The LCD screen
may indicate "bad filter" if the difference between the reactor pressure (P_react) and the filter
pressure (P_filt) is greater than 3WC.
If the filter media needs changing, disconnect the bottom inlet gas line, open the lid, and
remove the gas filter from the pallet to empty. Use a wire brush to scrape the grates and the
walls of the filter clean of soot/particulate build-up. The spent filter media can be dried and
added back into the feedstock at ~10%.
The foam filter disks can be cleaned with warm soapy water. Dry the foam filter disks
ALL Power Labs, Inc
Berkeley, CA
