Unfortunately, the process of "gasification of all Russia" is far from complete. Installation in a private house of a heat generator working from an electrical network is not an option, considering the existing tariffs for electricity / energy and their infinite growth. Probably, mainly for this reason, the popularity of solid fuel boilers does not drop, one of the varieties of which are pyrolysis models( another name - gas-generating ones).
How and what to collect with your own hands pyrolysis boiler for household use by yourself - the subject of the proposed article-instruction.
Principle of operation of pyrolysis boilers
High efficiency, therefore, economical fuel consumption in such installations is achieved by dividing the combustion chamber into 2 compartments. There are several designs of pyrolysis furnaces. For example, such.
Upper chamber. It loads fuel and burns it. The peculiarity is that it is necessary to provide a lack of oxygen. With this condition, the process of decomposition of the product slows down, and in fact, only charring occurs( cost efficiency!) And increased gas formation is initiated. Actually, this is what is called pyrolysis.
The lower chamber. It receives volatile substances from the 1-st compartment, which due to the additional supply of air is burned, releasing heat. Only a small part of it is spent on maintaining the pyrolysis process, and all the rest is spent on heating the coolant.
How is this realized in almost such a model, if the gases by definition are rushing up? In pyrolysis boilers an obligatory constructive element is the air supercharger( blower fan, smoke exhauster - names are different, but the essence is one).
The figure illustrates well the main operating cycles of a pyrolysis boiler.
In some models, the cameras are on the same level.
Actually, the matter is not in the engineering solution, but in the assembly of the installation, in which it is possible to realize the pyrolysis process, that is, to ensure a long burning of the fuel. And the choice of a specific scheme is at the master's discretion.
Features of the pyrolysis boiler
Materials
The body of the pyrolysis boiler is better made of sheet steel( from 2 mm, depending on the design capacity).Models of boilers that are assembled from thick-walled pipes are hardly suitable for heating private houses. Basically, such facilities are used to heat various utility rooms, garages or stalls.
The larger pyrolysis boilers are mounted on the basis of the majority of heat generators - rectangular shape. In some cases, if the model is powerful, it is advisable to lay its walls( from the inside) with fireclay bricks.
Dimensions of pyrolysis boilers
One of the most interesting and "mysterious" questions on this topic. All calculations are made in relation to a particular house, its heating system, with all its nuances, schemes and so on. The author will not give mathematical calculations and asks to believe in the word. It is better to design the pyrolysis boiler to a specialist. The development of documentation is worth the money, but in any case it will be cheaper to purchase an industrial manufacturing plant.
And if you consider that errors in calculations will entail additional costs( and very tangible) associated with various kinds of alterations and upgrades, then the expediency of such a decision is more than obvious.
Basic engineering solutions
Specificity of operation of pyrolysis boilers
Without knowledge of some of the nuances of using such equipment, it is pointless to take up the manufacture of such a model of a heat generator.
Quite "stringent" criteria for the moisture content of the fuel burnt. For example, for firewood the maximum value is 33 ± 2%.What is the reason for this? The rise in temperature triggers the evaporation of moisture contained in the product. Naturally, the steam will mix with pyrolysis gases and adversely affect the intensity of the combustion process. The use of wet fuel dramatically reduces the efficiency of the installation.
Not all solid fuel types are suitable for combustion in pyrolysis boilers. Given the specifics of their operation, only materials characterized by high gas formation during combustion can be used. The lack of volatile substances affects the efficiency of pyrolysis models. Simply put, a lot of firewood is consumed, but the sense is minimal.
In conclusion, you can indicate that the cheapest model( and a small capacity) is in the range of 48 000 rubles. In conclusion, you can indicate that the cheapest model( and a small capacity) is in the range of 48 000 rubles. And it's not a fact that such a pyrolysis installation will completely suit the owner. For example, the dimensions in accordance with the chosen location for installation. If you think about it, the manufacture of a pyrolysis boiler with your own hands, according to individual drawings, is a good solution to the problem of heating a private house, especially if it is impossible to connect it to the gas main.
