<HTML><FONT FACE=arial,helvetica><HTML><FONT COLOR="#000000" FACE="Geneva" FAMILY="SANSSERIF" SIZE="2">Dear Primitive gasifier developers:<BR>
All of the issues which are stated below have been addressed successfully. One interesting device is a cooling system which will handle the hot, dirty gas and produce a cool gas with a great deal of the tar removed and collects the tars, oils and water from the gas stream, for a 100 kw system the unit is 1.5m long and .45m wide, and 1.2 m tall and has external cooling closed loop cooling circuits. The entire 100 kwe system is 4 m long and 2.5 m wide. It is expensive, but with full automation and high quality performance, it is worth it. <BR>
Sincerely,<BR>
Leland T. "Tom" Taylor<BR>
President<BR>
Thermogenics Inc. <BR>
<BR>
In a message dated 3/19/12 8:14:16 AM, sinan@biomassindo.com writes:<BR>
<BR>
<BR>
<BLOCKQUOTE CITE STYLE="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px" TYPE="CITE"></FONT><FONT COLOR="#000000" FACE="Geneva" FAMILY="SANSSERIF" SIZE="2">Dear Dr. Reed and Mr. Miles,<BR>
It sounds like these people can use some valuable advise. We have been<BR>
working on rice husk gasifiers in Indonesia in the past couple of years,<BR>
mostly for chicken waste gasification. We keep the reactor under 500 C,<BR>
result is a good quality fertilizer with biochar.<BR>
Unfortunately there are so many companies in SE Asia, keep the reactor<BR>
very hot and they use water to cool the gas. Almost all the gasifiers I<BR>
have seen in those countries, ash is also removed by water. Gas coming<BR>
out the gasifier is so hot, they need smaller ponds to cool it down,<BR>
even for a smaller size gasifiers. They do not have a separate particles<BR>
pools, no filtering system, where the tar can be collected and used as<BR>
fuel again.<BR>
In these countries, building a 20 Kw gasifier costs less than a $ 1000.<BR>
Unfortunately their gasifiers also burns so dirty, there are no tar<BR>
cracking, and filtering. I have even seen on a 100 Kwe gasifier reactor<BR>
area was cooled with water, than same water wash the ash out, directly<BR>
to a well dug very close to gasifier. One can imagine what will happen<BR>
to ground water around this well. It is like spilling poison on the<BR>
ground, continuously.<BR>
They probably need a better design of rice husk gasifier, simple<BR>
filtered cooling pool, better ash collection system ( ash can be used<BR>
for many different purposes) and effective training for the users.<BR>
Knowing the departments and ministries involved in these kind of<BR>
projects, they will probably use the same people who built these faulty<BR>
gasifiers, as consultants. Hope you can get a chance to work with NGO's<BR>
which can do good for the local people and environment.<BR>
Regards,<BR>
Robert<BR>
<BR>
<BR>
<BR>
<BR>
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