Retrofit pellet burner


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Retrofit pellet burner

Pellets belong to the biogenic fuels, ie to the fuels of biological-organic origin. They protect the climate by reducing greenhouse gas emissions, conserve fossil resources and make us less dependent on countries with large deposits of raw materials.
For the production of wood pellets by-products of wood processing and inferior wood are used, so they also reduce any agricultural land, as happens in the production of biogenic fuels from plants. That sounds good, and who would not like to be independent of oil and gas?
Retrofit pellet burner
The retrofitting of a pellet burner is the simplest and least expensive option. Here, the existing boiler is used, to which a pellet burner is mounted. The boiler and the heating system are not changed, only the burner is no longer operated with oil or gas, but with wood pellets. A special burner is installed that is compatible with most boilers. So he makes an old oil boiler, for example, a solid fuel boiler for environmentally friendly heating.
The burners can achieve an efficiency of up to 90 percent. A pellet burner switches on and off like an oil burner or gas burner. It takes a little longer to start and can usually run both in one stage and two-stage with full or partial load, whereby the achievement of optimum efficiency is promoted.
A burner for retrofitting
is generally equipped with electric ignition and thermostat control, which ensure comfortable and safe operation at the same time. Basically, any boiler can be converted, even low or low temperature boiler, the opening in the boiler door only the appropriate size for the new burner
to have. The new burner controls with its own sensor now the constant boiler temperature, at low temperature boilers usually 70, otherwise usually 90 degrees, this is done automatically in one or two stages.
The pellet burners for retrofitting burn pellets in certain lengths. The possible lengths should be inquired beforehand and compared with the pellet supply on the market.
This is how a pellet burner works
In addition to the boiler, a reservoir is provided from which pellets are transported by a screw conveyor into the burner pot of the burner. The auger is connected to the burner by a fire hose, so that a burn-back to the auger is excluded.
Once there are so many pellets in the burner pot that the flame can be ignited, the auger stops. An incandescent spiral ignites the pellets (with fan support of the burner). It is switched off as soon as the built-in photocell registers the flame. Now the auger transports the amount of pellets to the burner, which are needed for the heating operation of a certain power. The burner heats the boiler to the desired temperature. When this is reached, the screw conveyor is switched off. The burner will now run for a few minutes, so that the burner pot is burned out. If the thermostat requires heat again, the burner is switched on again and the process is repeated.
Accessories and regulations
Basically, a suitable burner, a screw conveyor and a storage tank next to the boiler are required for retrofitting. A pellet burner for retrofitting can make certain demands on your chimney (for example soot fire resistance), which must be taken from the manufacturer's instructions and clarified with your chimney sweep.
Skillful craftsmen can retrofit the pellet burner in their own work, the manufacturer provides the corresponding instructions.

Video Board: How to Burn Wood Pellets in Any Ordinary Woodstove or Fireplace.

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