The paper presents the process of peat burning in a swirl furnace with countercurrent swirl flows and the results of a numerical study. The cyclone-vortex technology of solid fuel combustion allows the furnace volume of a boiler unit, its dimensions and weight to be reduced. The aim of the work is a numerical study of the combustion of pulverized peat in a cylindrical vortex furnace with countercurrent swirl flows. The results of computer simulation of the combustion of pulverized peat with a moisture content of 40%, an ash content of 6% and a higher heat of combustion Q?? = 12.3 MJ/kg are presented. The results of the influence of the design parameters of the furnace and heat load (from 100% to 15%) are given as well. When the heat load is reduced to 15%, the entrainment of unburnt particles increases. The cooled and adiabatic furnace is studied. A significant entrainment of unburned particles is observed n a cooled furnace. The fields of temperature distribution, gas velocity and particle trajectory in the volume and at the outlet of the furnace are determined. The three-dimensional temperature distribution in the furnace volume indicates the combustion of peat particles at temperatures (1300-1450?C). Values of the tangential velocity of a swirl flow near the furnace outlet reach 150 - 370 m/s, which ensures the efficiency of separation of fuel particles and a reduction in heat loss due to mechanical underburning (up to 0.06%). The results of a numerical study show that the diameter of peat particles affects the combustion process, namely coke of particles with an initial diameter from 25 microns to 250 microns burns out by 96%, and particles with a diameter of about 1000 microns are carried away from the furnace and do not burn. The furnace provides a complete combustion of dust particles of peat by 99.8% and volatiles by 100%.
Methane, which is found in coal seams, has long been seen as an alternative to imported natural gas. Capturing that victorious methane can immediately increase the versatility of the production of footwear, increase the safety of the minds of the workforce, and change the negative impact to dovkillya. And yet, there are low technical and technological folds, which galmuyut the development of the type of bottle and utilization of methane.One of the main directions of extraction of coal mine methane is the generation of thermal energy in boiler houses and other heat generators. However, this type of paliva is unstable in concentration and important, due to the fact that the technical riven has the same characteristics. The current development of technology and technology, in general, allows you to successfully improve the nutrition of methane. There are very few data on environmental and energy indicators for the process of scalding with different palnikov outbuildings.In the coal mines of the Donbass, there is a widespread stagnation of the boiler room with bottom (hollow) toe shoes. Further indications of scalding with different design features of this type of stokers will help to improve nutrition by reducing the chemical insufficiency of scalding gas and increasing the thermal pressure of the boiler. It is shown that the computer simulation and re-verification of the efficiency of coal mine methane scorching in scorching boilers from the stoking of bottom (hollow) stokers is shown to be possible.In the robot, an experimental simulation of the process of burning coal methane in the bottom of the burners of a modernized design was carried out, and tests were carried out on the distribution of medium-mass parameters in the gas at the exit from the fire line from the vicarious grids. And also, an analysis of stationary watering of the average characteristics of the flow fluidity, temperature, concentration of components, nitrogen oxide and nitrogen oxide fluidity was carried out.
The dependence of mankind on energy resources only increases with the development of scientific and technological progress. It is clear that the supply of natural energy resources will run out soon. The solution is using new energy generation technologies based on renewable and secondary sources. Due to the presence in Ukraine of operating combined heat and power plants, there is the possibility of producing thermal energy using the secondary heat by absorption heat pumps. At the same time, the thermal energy of flue gases and steam from steam turbines does not heat the atmosphere, but are involved in the generation of thermal energy for heating networks of settlements. Due to the ability of the absorbent solution to absorb and condense water vapor under the influence of low-potential and high-potential heat carriers, it is possible to significantly reduce the consumption of traditional energy resources and increase the overall efficiency of the combined heat and power plants. World experience shows that the use of secondary energy resources can significantly improve the country's energy balance. And the main problem is the availability of these resources. In today's changing climate, the use of renewable energy sources requires additional expences and it is appropriate to pay attention to use of present secondary energy resources, which are not used now. There are a lot of such resources available in heat generating facilities. This is especially noticeable in large cities with central heating networks. Therefore, increasing the efficiency of their work makes it possible to significantly improve the energy balance of the whole country and reduce tariffs for thermal energy for industry and individual consumers, which, in turn, will improve the living standards of citizens.
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