A wood or sawdust boiler is a viable option for your home; however, there are some things to consider. Because of these boilers’ effectiveness and environmental friendliness, they are growing in popularity. Everything you need to know about wood and sawdust boilers—their advantages, how they operate, and things to think about before installing one in your house—will be covered in this article.
One kind of heating system that uses wood to generate heat is called a wood boiler. They can be used to heat water for hot water taps and showers, as well as for underfloor heating systems and radiators. On the other hand, sawdust serves as the main fuel source for sawdust boilers. Because they employ renewable energy sources and emit few emissions, both varieties of boilers are regarded as environmentally beneficial substitutes for conventional oil or gas boilers.
The affordability of wood and sawdust boilers is one of their key advantages. Using a wood boiler can help you reduce your heating costs because wood is frequently less expensive than gas or oil. Government grants and incentives are also available for wood and sawdust boilers, which lowers the initial installation costs even more.
Nonetheless, there are a few crucial factors to take into account prior to setting up a wood or sawdust boiler in your house. For instance, you’ll need to make sure the boiler is installed in a suitable location and that you have adequate room to store the wood or sawdust. It is imperative to take into account the continuous maintenance expenses for wood boilers, as they necessitate consistent cleaning and upkeep to ensure optimal performance.
| Topic | What you need to know about wood and sawdust boilers |
| Efficiency | Wood and sawdust boilers are generally efficient, but efficiency can vary based on the design and quality of the boiler. |
| Cost | Initial costs for wood and sawdust boilers can be higher than other heating options, but they can save money in the long run due to the lower cost of wood fuel. |
| Maintenance | Regular maintenance is necessary to keep wood and sawdust boilers running efficiently. This includes cleaning out ash and ensuring proper ventilation. |
- Principle of operation of sawdust and wood boiler
- Burning of firewood
- Sawdust combustion
- Proper organization of the place for the installation of the sawdust-firewood boiler
- Norms and requirements for the room
- Organization of sawdust and firewood storage
- Selection of the flue gas venting system
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Principle of operation of sawdust and wood boiler
- During the combustion of solid fuel, a large amount of carbon dioxide is released. CO produced is directed to the afterburning chamber. During transportation, an air-gas mixture is formed, which is burned at high temperatures. To maintain the necessary temperature regime, the afterburning chamber is made of fireclay brick.
Fuel for bifuel boilers consists of wood and sawdust. Every fuel type mentioned above has specific requirements for operation.
Burning of firewood
All-purpose solid fuel Both wood and sawdust can be used to fuel long-burning boilers. However, when firewood is used, the equipment’s heat efficiency rises. The explanation is quite easy to understand. Burning firewood releases the most carbon dioxide, which is used to generate more heat.
Features of burning wood include the following:
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Laying the fuel and ignition is done manually.
When comparing the technical data of wood and sawdust boilers, heating with logs is more cost-effective. The primary drawback of utilizing firewood is the ongoing upkeep required for the hot water boiler. The furnace chamber must be cleaned, the ash removed, and fuel added two to three times a day. Every task is completed by hand.
Sawdust combustion
The combustion of sawdust is done with the highest level of automation. The process of fuel supply and combustion is as follows:
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Sawdust is fed into the combustion chamber by means of an auger transmission. The boiler automation monitors the intensity of the fuel conveyor movement. In case of an emergency situation, a signal is given to cut off the sawdust supply.
If necessary, a mechanized fuel storage is organized. After connecting the hopper, the boiler is able to operate throughout the heating season without stopping.
For use in bi-fuel units, hardwood wood chips with a maximum moisture content of 20% are permitted in addition to sawdust and firewood.
Proper organization of the place for the installation of the sawdust-firewood boiler
Bi-fuel boilers are widely used to heat private country homes, cottages, and vacation homes using wood and sawdust. While installing heating equipment for residential use, care must be taken to adhere to PPB guidelines as well as established building codes and regulations.
The general specifications for the space used for the fuel storage and boiler room, as well as for the flue gas extraction system, are outlined in order to ensure the bi-fuel unit operates safely and to prevent emergency situations. I consider the advice provided by the manufacturer as stated in the technical documentation.
Norms and requirements for the room
The technical features of sawdust and wood boilers are taken into consideration when choosing the boiler room space. Heating equipment burns fuel at a high temperature during operation, which can start a fire if it is not operated properly or if installation guidelines are broken.
Boiler room PPB requirements include the following:
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Boilers with a capacity of up to 40 kW can be installed anywhere in the house. Modern models are equipped with a forced smoke extraction system, which prevents smoke from entering the room. Boilers with a capacity of more than 40 kW are installed in a separate room.
Depending on the area, certain regulations may change. Speak with the district fire inspector prior to installing a dual-fuel boiler.
Organization of sawdust and firewood storage
Twenty-kilogram bifuel pyrolysis wood-sawdust boilers use seven to twelve tons of raw materials annually. The storage arrangement is a concern for nearly all owners of this kind of heating equipment. The following is mentioned in the PPB requirements regarding the space used for solid fuel storage:
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The storage room must not contain fuels and lubricants and flammable substances.
The primary goals of solid fuel storage are emergency preparedness and fire safety.
Selection of the flue gas venting system
At 600°C, the pyrolysis process begins, and at 700–800°C, sawdust and wood chips burn. A fire starts when soot builds up in the chimney pipes, raising the temperature to 1000–1100 °C. The primary, though not exclusive, criterion for selecting a chimney pipe is its capacity to endure extended heating without burning or deforming.
A chimney that satisfies the following requirements is appropriate for residential heating boilers powered by wood and sawdust:
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Thermal insulation – for full-fledged gas generation, it is necessary to maintain stable draught characteristics and fast boiler output to the working capacity. This is only possible if the chimney is well insulated.
The best solution is to install a ceramic or sandwich pipe, as experience has shown.
A few important considerations need to be made if you’re thinking about installing a wood or sawdust boiler in your house. First off, provided you have access to inexpensive or free wood or sawdust, these boilers can be an economical and environmentally friendly way to heat your house. Nonetheless, it’s critical to take the environment into account and make sure your boiler is operating as efficiently as possible.
Make sure the wood or sawdust boiler you choose will both meet your heating needs and save you energy. Select models that have low emissions and high efficiency ratings to reduce your environmental effect. Take into account additional elements like your home’s size, the amount of heat you need, and the accessibility of fuel in your neighborhood.
Another important factor to take into account with wood and sawdust boilers is maintenance. To guarantee that your boiler runs effectively and safely, regular cleaning and maintenance are necessary. This include inspecting for wear or damage and cleaning the ash pan, chimney, and combustion chamber.
Ultimately, hiring a trained expert to install and maintain your wood or sawdust boiler is imperative. This will lessen the possibility of accidents and increase the longevity of your boiler by ensuring that it runs safely and effectively. A wood or sawdust boiler can give you dependable and sustainable heating for many years to come with the correct upkeep and care.
Everything you need to know about wood and sawdust boilers to heat your home sustainably and effectively will be covered in this article. We’ll walk you through the essentials, including how these boilers operate, their advantages, fuel requirements, and maintenance. We can provide you with information about wood or sawdust boilers, whether you’re thinking about making the switch or you just want to know more about this green heating option. Come with me as we delve into the realm of wood and sawdust boilers!
