[Stoves] Rice husk briquettes in Vietnam was Re: Cuber and size of densifying machines

Sat Mar 15 12:26:10 CDT 2014

Dear Paul and all,

Below are some links for what we have in Vietnam, sorry that they are in
Vietnamese but you can see some machines and rice husk products
http://mayepcuitrau.com/
http://tmptrade.com/product.html?gclid=CPeW5YPylL0CFacF4goddiwA2Q

I've just briefly visited Mekong delta last month and met several people in
rice milling business to discover the chance to make rice husk briquette
there and was very surprise too with the fact that I found. Mekong delta is
the heart of Vietnamese rice production, there's a lot of rice mill there
and all of them (as far as I know) already have a buyer for their rice
husks. They often sign year long contract to buy all the rice husks, most
for making briquettes/pellets, some for direct use (making bricks,...). In
many area , people also use rice husk briquetted for daily cooking, most of
them burn as normal wood in three stone stoves. Small rice mill there can
handle 300-400 tons rice/day, producing 60-80 tons rice husks. 

In the north of Vietnam, due to small scale production of rice, we are
running short of rice husk briquette now, all producers have no stock to
sell even when the price already up by 50%. Most rice husk briquette
producers in the north of VN have relatively small capacity 300-600
tons/months due to the supplies of rice husks, supplying ability also depend
a lot of harvest season. 

The largest importers are Japan and Korea. Largest local buyers are food
processing and garment industry.

For the ash from rice husk briquette, all manufacturers offer to buy back
the ash from customers. Due to high silica content in the ash, it consider
somehow toxic waste" but at the same time, some fertilizer and construction
material need it for the use so its a win-win-win situation for everyone
involved. 

As for equipments:

The above briquette machines are local made, we have a few makers in
Vietnam. You can find similar from China too. Machines need 3 phrase power,
7-15kw for 200kg-1ton/hr, price range is around 2000USD-5000USD. 

Pellets machines: ring die system from China cost ~40kUSD for 1-2ton/hr, but
for export quality (need to deal/reduce silica first), there are some system
from Euro installed in the region but I'm not sure about the brand and price
(heard of 150k range). I will try to find more info on this.

I also visited Henan, China last summer looking for briquette and pellets
machines. There were some good machines there, some may work with grass or
straw. I would be very happy to discuss further if anyone interested.

As about myself, my background is business and I m running a small private
start up in Hanoi. Our main focus is to utilize the agriculture residues
(which e have million tons in Vietnam yearly) in a more useful way rather
than burning as waste. Our current product is a ND TLUD which use wood +
biomass, just started to make and sell for about 6 months with some positive
feedback. 

Anh

Anh Nguyen
General Director
Green Generation JSC
30A Tran Hung Dao St., Hanoi, Vietnam
Tel + 84 91 242 6666
Email: ntanh at greengenvn.com
Website: www.greengenstove.com

-----Original Message-----
From: Stoves [mailto:stoves-bounces at lists.bioenergylists.org] On Behalf Of
Paul Anderson
Sent: 15 March, 2014 9:06 AM
To: Discussion of biomass cooking stoves; Michael Shafer - Thailand; Kent
Good - Cambodia; alexis belonio
Subject: [Stoves] Rice husk briquettes in Vietnam was Re: Cuber and size of
densifying machines

Dear Anh,

On behalf of many of us, I request that you send to us more information
about the rice husk briquette processes and equipment and costs, etc 
that you mention are so well established in Vietnam.   This is VERY 
important and is not well known to us. Maybe there are some reports you 
could send.    Or you could ask others to assist to provide us with the 
information.

Thank you in advance.

And we are interested in getting to know your better, your employment,
training, etc.

Paul

Doc  /  Dr TLUD  /  Prof. Paul S. Anderson, PhD
Email:  psanders at ilstu.edu
Skype: paultlud      Phone: +1-309-452-7072
Website:  www.drtlud.com

On 3/14/2014 9:20 AM, Tuan Anh wrote:
> Robert and Richard,
>
> Vietnam used to have problem with excess rice husks at mills too, but now
they all make rice husk briquette, pellets so it turn from waste to tradable
goods. We have many rice husk pellets makers here for both domestic and
export.
>
> As far as I know, dealing with high abarisve silica in rice husk require a
much more expensive equipment. Low cost rice husk briquette machines can
serve well for simple tasks such as daily cooking or simple
commercial/industrial production.
>
> Anh
>
>
>
>
>
> On Mar 14, 2014 8:32 PM, Richard Stanley <rstanley at legacyfound.org> wrote:
>> Robert
>>
>> We have seen the same experience described by many in the wet processing
of briquettes, but with the wet process,  it was about abrasion to the
blenders and molders hands, as it is very much a hands-on process.
>> However we found a different way to handle them for our needs-- at least
in Mbale Uganda in 2007.
>>
>> In Mbale, rice husks were piled several meters high and spread out over
100 meter wide mounds all from the local rice mill.
>> With the rains, these mounds would begin to decompose --more like decay--
from within, leaving large voids beneath  --and invisible on-- the surface.
Many children  playing on them were reported to have fallen in and been
badly burned .  We were glad to discover that this glutinous mass was an
excellent binder and in-filler for the wet process briquettes The abrasive
properties of the original husk were abated in the decay process as well.
Rice husk blended briquettes were one variety of briquettes being made by
the Uganda United Womens Association- Joint.
>>
>> The UUWA-J is  headed by Vicky Akello. She and her team are really 
>> great trainers by the way and have trained all over Uganda and 
>> western Kenya ever since we first met in 2008. A contact for Vicky is 
>> : Akello victoria <uuwaj at yahoo.com>
>>
>> Richard
>>
>>
>>
>> On Mar 6, 2014, at 11:28 PM, robdeutsch44 wrote:
>>
>> Rice hulls are a very difficult material to pelletize with because of 
>> the high silica content makes it very abrasive on the dies and moving
parts.
>> Better to use rice hulls at point of generation (the rice mill) and 
>> use bulk gasifier.... Just my two cents :-)
>>
>> Robert in Cambodia
>>
>>
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