Five solid fuel boilers of long burning

Balt STROPUVA S10 is one of the leaders in sales in the segment of long-burning solid fuel boilers, and the outlines of its barrel-shaped body were successfully borrowed by other players in the heating systems market.

Structurally, the boiler consists of two steel cylinders, in the cavity between which the coolant circulates. The model works exclusively on wood, and the moisture content of the raw materials should not exceed 30%. Otherwise, condensation will inevitably form in the pipe. "According to the passport" one bookmark of firewood (up to 25 kg in one sitting) should be enough for a 30-hour continuous burning marathon, something like this is actually the case.

The model implements the principle of upper combustion of fuel: not all the contents of the chamber burn intensively, but only the top layer 15-20 cm thick. The air flows in the chamber are distributed in such a way that the firewood does not burn deep into. As a result, they patiently wait for their fate in an impromptu line, until an air distributor descends to them, located on the same level as the flame.

The intensity of fuel combustion directly depends on the force of air supply, which is changed by means of a bimetallic draft regulator. The efficiency of the model exceeds 91%, which means that the lion's share of the energy released in the process of burning wood is spent for its intended purpose. The boiler would also have a lower door for loading fuel and there would be no complaints about it at all.

The recipe for “cooking” a dish called Marten Comfort MC-12 is simple: we take an impromptu steel cabinet with a wall thickness of 5 mm, “pack” a plate heat exchanger and Polish TECH automation into it, leave enough space for the combustion chamber — as a result, we have a balanced all fronts long-burning boiler.

The model with the index MC-12 is the youngest in the product line of the Ukrainian manufacturer. It is designed to heat an area up to 120 m². The fuel is burned in the boiler chamber from top to bottom, thanks to which it is possible to achieve a long burning time (12-24 hours). Marten Comfort MC-12 "eats" firewood, coal, peat briquettes or wood processing waste.

The automation put into service with the boiler controls the operation of the circulation pump and the fan, which pumps the required amount of air into the combustion chamber. As soon as the fuel supply runs out, the boiler stops working automatically. The operational data of the model provide heating the coolant to a temperature of 90 °C at a maximum pressure in the heating circuit of 1.5 bar.

In maintenance, the Marten Comfort MC-12 is unpretentious: a movable lever on the right side of the body activates the grate cleaning system, for the rest of the programme, the owner of the boiler will only need to periodically empty the ash drawer. The benefit from the appearance of this boiler in the house is obvious — an investment in its purchase will pay off with more than an opportunity to save on heating without a headache in the future.

The Buran 10 model manufactured by the Dzenzelevsky boiler plant belongs to the family of solid fuel boilers with long burning. On one tab of fuel, it regularly works for the benefit of maintaining heat in the house for 12 hours to 2 days in a row and more.

Of course, the specific operating time of the boiler without “refueling” depends on many factors, ranging from the selected coolant temperature to the type of fuel used. The model easily "digests" firewood, wood chips, coal, sawdust or peat briquettes. For a denser loading of raw materials into the combustion chamber, the design of the boiler provides for an additional middle door.

Buran 10 produces one of the highest efficiency in the class — about 92%. All thanks to an improved heat exchanger in the upper part of the boiler. In it, the fuel is burned, and as it burns, the movable air heating chamber, together with the cast iron burner, gradually descends and is always in the zone of intense combustion. The temperature in it is kept at the level of 600-850 °C, due to which the pyrolysis gases burn out completely.

The boiler works autonomously, besides, if desired, it can be understaffed with automation. Starting from 2017, the entire model range of the series comes with a bottom, while the earlier versions of the boiler were deprived of it. Finally, the simplicity of caring for the "insides" of the product is praised — the cylindrical shape of its body and the upper outlet of the chimney (180 mm in diameter) are designed to greatly facilitate the cleaning of the boiler from soot, tar and other combustion products.

In the best traditions of the genre of building long-burning solid fuel boilers, the model with a east european pedigree Idmar CIC 13 is assembled in a barrel-shaped steel case, the fuel in which is burned in layers. But first things first.

The youngest modification of the boiler in the line has a capacity of 13 kW, and its strength is enough to heat housing with a total “square area” of up to 100 m². You need to visit the product with a visit for manual reloading of fuel only once every two days. However, this indicator is individual and can vary in the range of 12-76 hours depending on the type of raw materials used, the thermophysical properties of the building and the set temperature of the coolant in the heating circuit (35-90 °C).

Any type of fuel is applicable to the boiler — it is omnivorous to firewood, coal and peat briquettes, municipal solid waste and other garbage. All this is burned by the method of upper layer-by-layer combustion. Air circulation in the chamber is provided by multidirectional self-cleaning nozzles that do not get dirty or clogged with combustion products. Up to half of the total operating time, the fuel in the boiler is in a state of smoldering, which is why its overburning is practically excluded in the mode of maintaining the selected temperature regime.

The efficiency level of the model is under 90%, which is an excellent indicator for solid fuel boilers. The standard package of Idmar CIC 13 includes an air supply fan along with automation for control and monitoring of parameters. Another reason for pride is a wide range of capacities, which allows you to choose the best option for both east european operation and heating large industrial buildings(up to 800 m²., if we are talking about the 100 kW version of the boiler).

The Lithuanian boiler Candle Time 18 is the protagonist of water heating systems designed to heat rooms with a total area of up to 144 m².

The model works on the principle of upper combustion of fuel — only the upper part of the load with a thickness of less than 15-20 cm burns in the boiler. On one tab of raw materials, Candle Time 18 operates offline for up to a day and a half. Here everything directly rests on the type of fuel used: firewood and wood chips burn faster, and, for example, peat briquettes and coal are enough for a long time. The main thing is that the moisture content of the raw material does not exceed 30%, otherwise a noticeable condensate will form.

The boiler is made in the form of a cylinder, due to which the pressure difference on the inner walls is more easily maintained and, accordingly, the service life of the model is extended. There are two doors on the front panel of the barrel-shaped case: the upper one is used to load fuel, and the lower one will need to be opened 2-3 times a month to remove ash.

From the factory, the boiler is equipped with a built-in automatic controller, with the help of which a certain heating temperature of the coolant is set. Automation turns on and off as needed the blower fan, which ensures long-term and economical combustion of fuel according to the principle of gas generation. As a result, the efficiency of the model reaches 93%, which is a very worthy indicator for the kind of solid fuel boilers for long burning.