Solid fuel
boilers

Любое горение топлива представляет собой процесс возгорания пиролизных газов, выделяемых при сгорании дров, угля, пеллет и любого другого углеродного сырья. Конструкция твердотопливного котла FOCUS спроектирована таким образом, чтобы получить завершенный процесс горения с максимальным выделением тепла и аккумулировать его, передав энергию теплоносителю с помощью развитого конвективного теплообменника.

Combustion chamber design

Твердотопливный котел FOCUS спроектирован с учетом эксплуатации pellet burner, для установки которой в отопительное оборудование ФОКУС имеется дверной адаптер. Конструкция топки предполагает наличие двух дверей, что подразумевает его использование как классического твердотопливного дровяного котла, с возможностью работы на дровах, брикетах, угле и пеллетах.

Таким образом, камера сгорания котла ФОКУС адаптирована под сжигание дров (любого твердого топлива) и пеллет. Процесс горения и автоматическая подача топлива при эксплуатации пеллетной горелки контролируется микроконтроллером PLUM, позволяющим подключить до 10 датчиков. При установке пеллетной горелки в твердотопливный котел 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.