The temperature of burning coal is considered to be the maincriterion that allows you to avoid mistakes when choosing a fuel. Boiler productivity, its high-quality work directly depends on this value.
In winter, the issue of residential heating is particularly relevant. In connection with the systematic increase in the cost of coolants, people have to look for alternative options for the generation of thermal energy.
The best way to solve the current problem would be to select solid fuel boilers that have optimal production characteristics and retain heat well.
Specific heat of combustion of coalis a physical quantity that indicates how much heat is capable of being released when a kilogram of fuel is completely burned. In order for the boiler to work for a long time, it is important to choose the right fuel for it. The specific heat of combustion of coal is high (22 MJ / kg), so this type of fuel is considered optimal for the efficient operation of the boiler.
At present, there is a tendency of transition from installations based on the process of gas combustion to solid-fuel heating domestic systems.
Not everyone knows that creating a comfortableThe microclimate in the house is directly dependent on the quality of the selected fuel. As a traditional material used in such heating boilers, select the wood.
In harsh climates,characterized by long and cold winters, it is rather difficult to heat the dwelling with wood during the whole heating season. With a sharp decrease in air temperature, the owner of the boiler is forced to use it on the verge of maximum opportunities.
When choosing wood as a solid fuelthere are serious problems and inconveniences. First of all, we note that the burning temperature of coal is much higher than that of wood. Among the disadvantages is the high rate of combustion of firewood, which creates serious difficulties in the operation of the heating boiler. Its owner is forced to constantly monitor the presence of firewood in the firebox, a rather large number of them will be required for the heating season.
Температура горения древесного угля значительно above, so this fuel option is an excellent alternative for conventional firewood. We also note an excellent indicator of heat transfer, the duration of the combustion process, low fuel consumption. There are several types of coal associated with the specifics of production, as well as the depth of occurrence in the earth's interior: stone, brown, anthracite.
Each of these options has its owndistinctive qualities and characteristics that allow it to be used in solid fuel boilers. The temperature of coal burning in the furnace will be minimal when using brown as its composition contains a fairly large number of various impurities. With regard to indicators of heat transfer, their value is similar to wood. The chemical reaction of combustion is exothermic, the heat of combustion of coal has a high rate.
The coal ignition temperature reaches 400 degrees. Moreover, the heat of combustion of coal of this type is quite high, so this type of fuel is widely used for heating residential premises.
Максимальная эффективность у антрацита.Among the disadvantages of such a fuel, we highlight its high cost. The temperature of burning coal of this type reaches 2250 degrees. Not a single solid fuel produced from the earth's interior has a similar indicator.
Such a device has design features, involves the carrying out of the pyrolysis reaction of coal. Charcoal does not belong to minerals, it has become a product of human activity.
The temperature of burning coal is 900 degrees,which is accompanied by the release of a sufficient amount of thermal energy. What is the technology to create such an amazing product? The essence lies in the specific processing of wood, so that there is a significant change in its structure, the release of excess moisture from it. A similar process is carried out in special furnaces. The principle of operation of such devices is based on the pyrolysis process. The charcoal kiln consists of four basic components:
After entering the chamber, gradualsmoldering wood This process occurs due to the presence in the furnace of a sufficient amount of gaseous oxygen that supports combustion. As smoldering is observed, the release of a sufficient amount of heat, the conversion of excess fluid into steam.
The smoke released during the reaction goes tothe recycling compartment, there it is completely burned, heat is generated. The charcoal kiln performs several important functional tasks. With its help, charcoal is formed, and a comfortable temperature is maintained indoors.
But the process of obtaining such fuel issufficiently delicate, and at the slightest delay possible complete combustion of firewood. It is necessary at a certain time to remove charred blanks from the furnace.
At observance of a technological chain it turns outExcellent material, which can be used to fully heat the living space during the winter heating season. Of course, the burning temperature of coal will be higher, but not in all regions such fuel is available at a price.
Charcoal burning begins attemperature of 1250 degrees. For example, a smelting furnace works on charcoal. The flame that forms when air is fed into the furnace melts the metal easily.
Due to the high temperature, all internalfurnace elements are made of special refractory bricks. For their laying, refractory clay is used. When creating special conditions, it is quite possible to obtain a temperature in the oven exceeding 2000 degrees. Each type of coal has its own point of ignition. After this indicator is reached, it is important to maintain the ignition temperature by continuously supplying excess oxygen to the furnace.
Among the shortcomings of this process, select the lossheat, because part of the energy released will go through the pipe. This leads to a decrease in the temperature of the furnace. In the course of experimental studies, scientists were able to establish the optimal excess amount of oxygen for various types of fuel. Thanks to the choice of excess air, you can count on the complete combustion of fuel. As a result, you can count on minimal heat loss.
The comparative value of fuel is estimated by itscalorific value, measured in calories. Given the characteristics of its various types, it can be concluded that it is coal that is the optimal type of solid fuel for boilers. Many owners of their own heating systems try to use boilers operating on mixed fuel: solid, liquid, gaseous.
