Kettle on coal: the principle of work, advice on choice and market review

Kothet on coal is an indispensable thing for everyone who wants to have their own heating source, independent of the centralized system, or in the absence of it.

Principle of operation

These devices are not in the full sense of the word modern and innovative, but the main models on the market are quite advanced devices. A boiler of long burning on coal can heat the room for a long time, does not require constant monitoring of its operation - this distinguishes it from the fireplace.

The principle of operation of such devices is based on the constant injection of hot air and the permanent burning of solid fuel coming from the top down. The whole process of combustion is safe, as absolutely controlled. The prevalence of these devices and their popularity is explained by the cheapness of coal that goes to kindling, as well as the high efficiency of this heating device.

Benefits

The high performance of the boiler on coal is affected by the feature of its design. Like any other heater, this device has its pros and cons in practical use.

The merits of the device include the following qualities:

• Full consumption of fuel material - coal burns to the ground and burns slowly enough, thoroughly warming up the house;
• Air supply is limited - pure oxygen in the house is kept;
• The whole process of temperature injection is created by built-in automation, which ensures a full consumption of raw materials (about 1-2% of coal may remain unused);
• There is no need for constant supervision and regular maintenance - the boiler is unpretentious and reliable in operation;
• Volume of the loading chamber - it is possible to lay almost 350-500 liters of fuel raw material in one time, which allows to extend the heating time to several days;
• It does not take much time to clean the chambers and the boiler itself;
• The combustion process occurs evenly, is controlled, less soot is released, there is no overheating of the coolant.

To date, heating with a coal boiler is the most comfortable option for heating a private house for its residents.

disadvantages

In addition to the obvious advantages, coal systems have some disadvantages in their work. They are few, but they are quite significant:

• High cost of the boiler for coal burning on the background of conventional devices (1.5-2 times higher);
• Similar performance with other types of heating at a higher cost;
• Dependence on the source of electricity;
• The lack of the possibility of additional laying of coal after the start of the combustion process - additional portions can not already be reported until the previous combustion is complete.

However, the overall effectiveness of coal appliances still attracts buyers so much that few people stop these shortcomings.

Types of heating devices

Modern manufacturers offer basically two types of such devices. Heating boilers on coal are as follows:

• Solid fuel with the principle of burning "from top to bottom";
• Automatic, with a burner and a coal feeder.

Each variety is purchased by the buyer, depending on the availability of funds and the prospective intensity of use of the device. Both types of boilers are quite versatile, they can use both wood and coal briquettes for burning. The choice is also made on the basis of operational features, after analyzing the merits and demerits of each type, especially the possibilities of supplying the appropriate fuel.

Fuel difference

The essential lack of wood is the rate of its combustion and the constant need to control the heating process, when often it is necessary to add raw materials to the furnace. In turn, coal for boilers is much more economical and more convenient. It burns or smolts much longer, for him long-combustion chambers have been designed, which allows to keep heat in the system stably and long.

What to load into boilers: coal, firewood or other raw materials - every home owner decides for himself. It should be borne in mind that the lack of firewood - in their low density and mass. Coal gives more thermal energy at a similar volume, burns much longer. But coal also differs by brand - different types of this fuel burn faster or slower. In this case, even ordinary coal grades allow to increase breaks between loads for several hours (depending on the volume of the loading chamber, the interval can be up to 4-5 hours).

Boilers for solid fuels

Solid-fuel boilers on coal are popular cylindrical devices that have a large combustion chamber. As the fuel burns down, the mass of coal decreases, the remains fall on the grate of the ash chamber. Controls the combustion of a special fan. Coal is crushed by a load, air diffusers work from below.

The intensity of operation is dictated by the built-in thermostat, which has a chain drive. The air is supplied naturally. In some brands of devices, the temperature is regulated by sensors that report measurements to the control unit, and it controls the flap of the telescopic tube.

Automatic

The automatic boiler on the coal is usually structured in the form of pellets. They allow you to use a burner and a spare fuel bunker. The heat exchange sector is similar to that of a traditional boiler - a fire-tube principle or a multi-pass unit is used.

The burner has a retort design: a bowl, feeding auger, reducer, electric motor, fan blows air. Coal moves from the hopper along the auger and gets into the bowl, and through it through the side slits air enters through the blowing by the fan.

All processes in this device are automated - from ignition to final combustion. The fuel reserve is not limited, it can also be poured. Such a boiler requires stopping and cleaning, additional maintenance about once per week.

Additional Details

The boiler of long burning on coal has the possibility of making changes to the design in order to modernize it and increase efficiency. For example, for more even heating of the whole house and continuous work, you can buy additional components:

• The UPS is an uninterruptible power supply that will protect the house from power surges. After switching off the electricity, the procedure for injecting air into the fuel chamber will still continue. The duration of the boiler operation in this case depends on the total power and power consumption of the UPS.
• Pump for circulation, which will provide additional support for the natural circulation of the heat carrier. Natural processes, for all their simplicity and efficiency, are not always an advantageous option or are unsafe in operation, they contradict the safety engineering. With the pump, it is possible to create a forced flow of heated liquid and thus significantly increase the productivity of such an aggregate as a coal-fired boiler.
• The boiler for indirect heating is actual for a single-circuit device. The boiler will provide the entire house with hot water heated from the appliance.

Cost and brands

Such a boiler, the price of which on average is 300-700 dollars depending on the model, is not an affordable option for most buyers, even considering its high efficiency. Usually, the need for autonomous heating with the use of coal arises in rural areas, in cottage villages, farms. Of course, this price justifies itself, given the economy and convenience of the device. However, it is possible to reach the payback level only after 5-6 years of constant use of such a coal-fired boiler with regular supplies of raw materials.

Today, such brands of boilers as Depro, Heiztechnik, Mart, Stropuva, Liepsnele and others are on the market, including domestic ones. Most of the issuing companies are interested in distributing their products and meet customers - they announce shares, make discounts or produce simplified models in the economic segment. Some solutions and technologies can significantly reduce the price of devices with the principle of top burning. Therefore, naturally, you can expect a decline in prices for this type of heating systems.

Owner feedback

The opinions of users of this device do not differ much from the overall assessment. The boiler is recognized by the majority of buyers as a very profitable and convenient to use device. Lithuanian products of the firm Stropuva have a good reputation, which, unfortunately, not everyone can afford. German boiler on Heiztechnik coal also enjoys well-deserved popularity.

Many people stop the fact that sometimes in a given area there are difficulties with the supply of fuel. It is easier and cheaper to order wood, despite its high consumption. A boiler, the price of which is prohibitive for most, becomes the cherished dream of many farmers and residents of suburbs or villages. After all, in their opinion, with such a heating device you do not need to think about the conditions of keeping livestock, it is easy to heat the house and the wing.

In general, the coal unit is an advantageous and worthy acquisition for the economy, which will solve a lot of pressing issues.

So, we found out what heating boilers are on coal.