If we already know how much steam do we need, we can count how
big boiler will we need. Specific feature of steam systems is
fact, that the steam is absorbed by the raw material and that’s
why those systems have condensing circulation relatively short.
It means, that to the boiler is delivered a big amount of supplying
water, and temperature of this water is lower than temperature
of water delivered to device that produces steam in which drip
retrieval is big.
That’s why water treatment should be more regular and has better
quality than in case of system with big drip retrieval.
The amount of steam is defined in kilos produced of supplying
water in temperature of 100oC.
But in our specific case steam applying would be quite dangerous,
because supplied water has much lower temperature and the steam
is not 100oC hot, and it would mean that our steam is produced
in atmospheric pressure.
The efficiency of boiler varies depending on supplying water
temperature and production pressure. When you choose a boiler
you should buy a 25% bigger one than it results from theoretical
demand for steam.
The best kind of boilers for pelleting demand are smoke boilers.
For smaller machines it is recommended to install a timer, which
enables turning on in advance, before start of new shift.
If some machine (practically or theoretically) is not able
to produce enough amount of steam, then the temperature of water
should be increased. It is easy to make using fuel economizer
and thermally isolate supplying water container. This is a very
good way of eliminating waste of warmth. We can’t forget that
waste of warmth is very expensive.
We should also mention that drip is to get back to supplying
water container to decrease to minimum consumption of fuel.
Another practical advice says, that increasing temperature
of water for 6oC lets decrease for 1% consumption of fuel needed
to transform water into steam.
Often reason of wet steam producing is too high level of water
inside boiler – it is recommended to check regularly this level.
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