We have almost finished the installation of our new Tatano Biomass Pellet boiler. The unit develops a maximum of 25KW’s, and will be used to heat our home. The boiler is situated in an external building, and we have fitted underground pipes, which lead to the house and join into our existing system.
As stated in early articles on the blog, the reason we have chosen this boiler is it gives us flexibility in what type of biomass pellets we can use effectively. The boiler is simple, however very robust and can withstand corrosion that would destroy other pellet boilers and stoves. The simple reason is it uses heavy gauge metal, similar to coal boilers to withstand the corrosion of straw pellets for example.
The boiler has a 140-litre hopper, which will hold roughly 84kgs of pellets. There are options to have larger hoppers that can even store your entire years supply of pellets. Because we intend to carry out research on different types of biomass pellets and they’re burning characteristics, we decided a smaller hopper is more suitable so we can change the pellet batch easily.
The door to the boiler has smaller openings to view the fire, and to put logs into the fire without having to open the large door. The Tatano may require more maintenance than more expensive sophisticated systems, however the maintenance is kept as simple and easy as possible. The horizontal heat exchanger tubes are easy to inspect and clean to get good heat transfer. This unrestricted access to the heat exchanger tubes and burn chamber means we will be able to gather more information on the burning characteristics of different biomass pellets.
The last image is of the burn pot, and as stated in earlier articles on grass pellet stoves this design of the burn pot is crucial to the boilers ability to successfully burn a wide variety of fuels. In the base of the burn pot is the auger, which pushes pellets up through the burn pot, the igniter (the white circle) then lights the pellets. Half way up the burn pot you can see several holes, this is where air is injected to fuel the fire.
The auger will be set at different minute intervals to feed more pellets up to the fire. This will depend on the type of pellet burning, as some pellets burn quicker than others. As the new pellets are pushed through, the ash and other deposits such as clinkers are pushed over the edge of the burn pot. The user at the beginning or end of every day or every few days then collects the ash.
We are very happy with the Tatano boiler, and we look forward to using it to heat our home and continue our research into different types of biomass pellets.
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