Solid fuel
boilers

FOCUS

Any combustion of fuel is a process of ignition of pyrolysis gases released during the combustion of wood, coal, pellets and any other carbon raw materials. Design solid fuel boiler FOCUS designed in such a way as to obtain a complete combustion process with maximum heat release and accumulate it, transferring energy to the coolant using an advanced convective heat exchanger.

Combustion chamber design

The FOCUS solid fuel boiler is designed with operation in mind pellet burner, for the installation of which in the FOCUS heating equipment there is a door adapter. The design of the firebox assumes the presence of two doors, which implies its use as a classic solid fuel wood-burning boiler, with the ability to work on wood, briquettes, coal and pellets.

Thus, the combustion chamber of the FOCUS boiler is adapted for burning wood (any solid fuel) and pellets. The combustion process and automatic fuel supply during operation of the pellet burner is controlled microcontroller PLUM, allowing to connect up to 10 sensors. When installing a pellet burner in a solid fuel boiler FOCUS and supply of pellets from the pellet hopper, the buyer receives a pellet boiler room at a lower price with the efficiency of heating equipment 95%.

Heat exchanger

The main combustion product is "bulk" hot air. In addition to efficient combustion of fuel, the boiler must provide heat convection of a large volume of hot air. For these purposes, the heating equipment is equipped with a developed heat exchanger built into the structure of the furnace.

Many solid fuel boilers use cast iron heat exchangers. Heating the metal with a high heat capacity improves the efficiency. Steel heat exchangers also provide good convection, especially in cases of special design solutions.

The FOCUS solid fuel boiler has a combined heat exchanger. Originally a plate type, also used as an ash filter. The main convection of hot air is provided by a horizontal fire-tube heat exchanger, as the most efficient and often used in industrial and pellet boilers.

The design of the heat exchanger assumes that the movement of gases from the burners is fast enough for efficient heat exchange.

Ash cleaning

The possibility of using fuels with high ash content and cleaning the boiler is ensured by its design. A plate heat exchanger is used to sediment the bulk of the ash, which can be easily removed. Serial version of solid fuel boilers FOCUS focused on operation with an ash pellet. The heating equipment is equipped with a fire-tube heat exchange circuit without turbulators (*), which are quickly brought in by ash during the active movement of flue gases from the flare burners and complicate subsequent operation.

Afterburning of pyrolysis gases

Full combustion of pyrolysis gases released during heating of solid fuel reduces the volume of ash emitted and the level of contamination of heating equipment during operation. For the combustion of high-ash fuel, as well as problematic grades of coal (DG grade) and biogranules of lignin with an ash content of 15-17% in FOCUS solid fuel boilers, a classical approach is applied. The air supplied to the combustion chamber is divided into primary and secondary. Primary air is fed under the grate to ensure fuel smoldering. Secondary is supplied above the fuel for afterburning pyrolysis gases and maximizing smoke reduction (underburning of gases).

Automation

The ecoMAX860P TOUCH sensor automation regulates the air supply to the pellet burner and the solid fuel boiler separately, taking into account the different operating modes of the equipment. This approach implies a wide range of automatic settings.

(*) To all solid fuel boilers FOCUS design changes can be made during production according to the customer's specifications... Can also be installed turbulators provided that wood pellets are used during operation.

The FOCUS solid fuel boiler is a modern heating equipment that takes into account all the features of the fuel available in Ukraine. The design assumes manual (backup) loading and automatic loading with an auger that feeds biofuel pellets. The pellet burner is not included in the scope of delivery.

Owners of private houses for autonomous heating can buy a solid fuel boiler. The purchase of a pellet burner will allow using the equipment as a pellet boiler with automatic feed and save more than 50% on heating. Industrial solid fuel boilers FOCUS 100-500 kW are offered.

work on all types of pellets, including agro- and bio-granules with high ash content;
a fast assembly system is used;
provide an automatic mode of operation according to the principle of operation of a pyrolysis boiler;
Plum ecoMAX860P Touch controls the operation of the heating circuit and the intensity of the boiler combustion by supplying air according to the pyrolysis principle from the top and bottom (under the grate) of the combustion chamber;
heating equipment with weather-dependent automation;
mechanical cleaning of the boiler is provided for by the design of the heating unit;
maintenance of equipment during operation is not laborious;
the design withstands thermal stress well;
high efficiency (95%) when operating with a pellet;
have a developed heat exchanger, the bottom of the boiler is not taken into account in heat exchange, but only the useful area of the circuit.

The body of the FOCUS solid fuel boiler is made of 092GS carbon steel, which is resistant to corrosion and has increased strength compared to general-purpose steel. Boiler steel grades are not produced in Ukraine, but the design of the boiler implies a balanced thermal load.

The boiler body is made of 4 mm steel, the inner lining is 6 mm, and is reinforced.

The doors of the combustion chamber, ash pan and heat exchanger are thermally insulated and do not pose a danger to workers in the process of fuel combustion in the furnace. As a result of a well-thought-out engineering solution, the thermal loads of the boiler are within a safe range. On the outside, the doors are coated with gray heat-resistant powder paint.

If you want to purchase a solid fuel boiler for heating a private house, leave yourself the opportunity to operate pellet boiler with 50% fuel economy... The FOCUS pellet burner is quickly mounted in the door adapter, transferring the heating equipment to automatic operating mode.

Combined heat exchanger with a developed convection surface for accumulating heat of hot air: plate and horizontal fire-tube. The second type of heat exchanger is used to remove the generated heat from bulk air in industrial boilers.

In the production of a solid fuel boiler FOCUS the technology of weldless assembly is used. With the maximum number of cut and bent elements. It includes the use of adapters such as Victaulic for non-welded connection of pipes for the layout of multifunctional boiler houses with a capacity
up to 2.2 MW.

The boilers are undergoing production testing. If the operating characteristics of the boiler go beyond the normal range, its operation, the 4-way valve and the heating circuit, compensating for the critical parameters, is controlled by the automation.

A fast assembly system is used.

FOCUS solid fuel boilers are pellet automatic boilers with weather-dependent automationconnected to the "Smart Home" system, which do not require a buffer capacity. With their help, autonomous heating of objects remote from public mains is provided, using biogranules in full automatic mode.

Our engineering company is engaged in the deployment of FOCUS autonomous boiler houses with a capacity of 17 kW to 2.2 MW.

Using FOCUS heating equipment, from ordinary solid fuel boilers for heating private houses, shops, offices and industries, you can get boiler rooms that work with manual loading (emergency) and use of firewood on the principle of gas generating boilers and provide automatic fuel supply (with the help of additional equipment).

FOCUS solid fuel boilers in combination with a flare burner and a hopper work as pellet boilers adapted to the combustion of agricultural granules. During the combustion process, the equipment is contaminated with ash in a controlled manner due to the well-thought-out technology of burning pellets, which is also used when laying firewood, coal or briquettes, and the emitted pyrolysis gases. Flue gases provide a high coolant temperature and good heat transfer.

With all the advantages, this equipment has a not very high price and high efficiency with the ability to operate on an agricultural pellet in a fully automatic mode.