In fact, Indonesia is currently a net importer of petroleum
because the production capacity is not sufficient to the existing needs. In the
1980s our oil production was around 1,700 barrels per day (BPD), while the need
for consumption was only about 400 BPD. While the current level of production
range of 800s BPH while consumption needs can reach 1400an BPD. This should
encourage the use of various renewable energies. Moreover, the problem of energy
sovereignty is also an important thing for the existence of a country. If the
energy source is easy and cheap is available and easy also in its utilization
would be a choice. The rice husk briquette (although the type of solid fuel but
also one of the solutions, because our staple food from rice that produces
waste rice husk. Rice husks that initially have a density of about 125 kg / m3
can be 1200 kg / m3 or nearly twice as dense than hardwood stems and also much
denser than wood pellets ranging from 650 kg / m3 when briquetted. By being
briquetted into cost-effective transportation is also easy to use.
Indonesia's paddy production in 2008
was 59.9 million tons of dried unhulled rice (GKG= Gabah Kering Giling), with
an average rice husk percentage of 25% / ton of rice, 15 million tons / year.
Indonesia is also the largest importer of three largest rice importers in the
world according to IndexMundi in 2014 which reached 1.5 million tons. While
China ranks first with 3 million tons, and Nigeria 2.4 million tons. Food
self-sufficiency that is rice or rice is also no less important thing. If rice
self-sufficiency by increasing production of 1.5 million tons of rice husk
waste generated also a lot of rice husk briquette production can also be
increased.
The process of production of rice husk
briquettes is also easy especially compared to sawdust briquette briquettes.
This is because the rice husks do not need to dry and the raw materials are
homogeneous, so that after being accommodated temporarily in the silo or bin
can be directly distributed to the screw extruder to be briquetted. With 17-19%
lignin content of rice husks no additional adhesive (binder) is required on
rice husk briquetting. The briquettes are subsequently cooled and subsequently
packaged to be shipped or marketed to the user. Drying process in addition to
increasing production costs also need investment in the form of drying
equipment itself which generally use rotary dryer (drum dryer).
The use of rice husk briquette is also
the same as sawdust briquette briquette for fuel. Industries can use the
briquettes as heat sources such as cooking and steam production with boilers.
Compared to sawdust briquettes, rice husk briquettes have lower calorific value
of around 3500 kcal / kg and also high ash content of about 20%, so the type of
static grate combustor does not match,
because the amount of ash that makes pores grate becomes clogged. While the
grill moving grate (chain grate) suitable for briquettes husk rice. Rice husk
ash contains a lot of potassium or K is very well returned to the soil as a
fertilizer. Silica can also extract ash rice husk briquettes because it is also
quite high content.
Another application is to coat the
molten steel at the steel plant to increase the carbon content in the steel,
but in the form of rice husk charcoal. For that the rice husk briquettes then carbonized
for making rice husk briquette charcoal. The carbonization of rice husk
briquettes can be done in specially designed furnace with each furnace
typically able to accommodate about 2.5 tonnes of rice husk briquettes and a
20% conversion rate to charcoal with a time span of 10-14 days. If at present
charcoal is not briquetted and shipped or sent it to steel mills, the
transportation becomes problem because inefficient, so the briquetting is the
solution. In addition, of course, rice husk briquette charcoal is also able to roast meat, and fish as well
as sawdust charcoal briquette.
InshaAllah we can supply rice husk
briquettes machineries including its carbonization furnace (if needed). For
those interested please please send an email to eko.sbs@gmail.com
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