WEBDec 1, 2023 · After undergoing gassolid heat transfer, the hightemperature coal gas is obtained. Subsequently, the particles are introduced into the particle heater and heated by the combustion of blast furnace gas. The present study focuses primarily on investigating the gassolid flow and heat transfer in the riser. ... Adv. Powder Technol., 30 (2019 ...
WEBarticle{Li2019DryingKO, title={Drying kinetics of coal under microwave irradiation based on a coupled electromagnetic, heat transfer and multiphase porous media model}, author={He Li and Chunshan Zheng and Jiexin Lu and Liyan Tian and Yi Lu and Qing Ye and Wenke Luo and Xiangnan Zhu}, journal={Fuel}, year={2019}, url={https://api ...
WEBApr 1, 2022 · The heat and gas transfer characteristics of coal seam under MI heating is analyzed. What's more, the impacts of key parameters on gas production, ... Microwave irradiation on pore morphology of coal powder. Fuel, Volume 227, 2018, pp. 434447.
WEBThe ambient air temperature is 25°C, and the heat transfer coefficient at the upper surface of the coal stockpile is h = 5 W/ 2. Atmosphere Insulated Figure 2 (a) (b) (c) (7 points) Determine the heat flux on the upper surface of coal powder, q (7 points) Determine the temperature of the upper surface, Tw.
Share. Heat transfer depends on the efficiency of contact between air and water flowing through a tower, which means that cooling tower fill design is critical to airwater mixing. By ...
WEBJun 21, 2017 · The moisture content of coal (MCC) has an important effect on the thermophysical properties and the granular flowability. However, it brings both active and negative influence to the heat transfer between the fluidizing moist coal and the immersed tubes in the fluidized bed. Four groups of bituminous coal with same size distribution .
WEBJun 14, 2019 · For better understanding of the heat transfer and species transport details, a numerical model for such reacting multiphase flow of coalSCW in IWSR was established with multiphase flow dynamics, conjugate heat transfer BC and species transport all incorporated. The result of this model was proved to be in agreement with experimental .
WEBJan 8, 2018 · Coalfield wildfires are serious astrophes associated with mining activities. Generally, the coal wildfire areas have tremendous heat accumulation regions. Eliminating the internal heat is an effective method for coal wildfire control. In this study, high thermal conductivity component of a heat pipe (HP) was used for enhancing the heat dissipation .
WEBMay 23, 2012 · 1 Jan 2021 | International Journal of Heat and Mass Transfer, Vol. 164. Modeling of a Wellhead Heating Methodology With Heat Pipes in Coal Mines. 16 November 2020 | Journal of Energy Resources Technology, Vol. 143, No. 1. ... 1 May 2014 | Powder Technology, Vol. 258.
WEBMay 8, 2023 · In this study, a coal pulverizer mill simulation was carried out with dynamic modeling to analyze mass flow rate, heat transfer, and energy balance to overcome these problems. Dynamic modeling simulations are carried out .
WEBJan 1, 2020 · The HTC model is characterized by modelling heat transfer through the powderbed with a constant heat conduction boundary condition on the solidpowder contact surfaces. For calibration against the experimental measurements, all the simulation data is the same as the one of the HF model and the only variable is the HTC of the .
WEBDec 9, 2023 · In the fluidized bed, coal gas from the final reduction furnace is cooled by a cooler with water as medium. With ore powder heated and reduced, the coal gas is injected into horizontal final reduction furnace. At the same time, the heat of cooling gas is recovered in the form of high compressed steam.
WEBJan 16, 2024 · It is found that the heat radiation and conduction directly transferred from char to coal are all relatively small, and the gas–coal convection is the main factor in the coal heating process. However, the heat carried by the gas into the pyrolyzer only accounts for less than % of the heat received by the coal, implying that the gas phase ...
WEBMar 7, 2020 · In the heat transportation of core of high temperature gascooled nuclear reactor (HTGR), radiative heat transfer plays a significant role in the CFDDEM simulations. The numerical investigation is conducted for parameter analysis and wall effect of the thermal radiation. A cell model is presented to discuss the effects of temperature .
WEBSep 1, 2019 · Ying Cui et al. [11] investigated the coupled combustion with heat transfer in a coalfired SCO 2 circulating fluidized bed boiler, and the effects of thermal boundary conditions on the ...
WEBAug 1, 2017 · On the basis of the literature above, a nonlinear dynamic model of a MPS (Mill Parter Ship)type medium speed coal mill is proposed in this study based on its mass and energy balance. The effect of raw coal moisture on the energy balance of coal mills is considered to improve the accuracy of the model and all heat inputs into or outputs from ...
WEBOct 1, 2018 · Then, the discharge brine heat is utilized to heat oxygen and feed to reduce the exergy destruction of reaction and heat transfer, which improved the energy efficiency from % to %, and ...
WEBEnergy generation. For use in thermal power plants, coal is ground into dust using a device called a powdered coal mill. The resulting product, called powdered coal or pulverized coal, is then generally used in a fossil fuel power plant for electricity coal is a significant dust explosion hazard, as large quantities are suspended in air for .
WEBMar 16, 2022 · In this way, the upper coal pellets formed a heat transfer buffer shell for the lower ore pellets, which not only facilitated the formation of gasphase reductant (reaction ), ... It was recommended to attach the coal powder to ore pellets outside the rotary kiln, set the tuyeres at the reaction inlet to reduce the energy fluctuation by the ...
WEBAug 1, 2013 · CO 2 from IGCC plant as a heat transfer fluid in organic Rankine cycle in enhanced geothermal systems is found feasible.. Power generation was higher for ammonia in ORC amongst the fluids evaluated. • The lowest possible temperature at which CO 2 could be discharged from the binary heat exchanger was lowest for nButane.. Power .
WEBMar 30, 2020 · Circulating fluidized bed (CFB) boilers has realized the clean and efficient utilization of inferior coal like gangue and coal slime, high sulfur coal, anthracite, petroleum coke, oil shale and other resources. As a country with the largest amount of CFB boilers and the largest installed capacity in the world, China has 440 100–600 MWe CFB boilers .
WEBDOI: / Corpus ID: ; Intensifiion of hydrodynamics and heat transfer characteristics of coalchargas flow in a high solidsflux downer with swirling blade nozzle
WEBApr 1, 2013 · Oxycoal combustion exhibits different characteristics of combustion, flow and heat transfer from those of aircoal combustion, due to the high concentration of CO 2 and H 2 O in the product gases. Using computational modeling, this study investigated the combustion and wall heat flux (WHF) of a 100 MW e boiler under air and oxycoal .
WEBJul 2, 2021 · Coal is the energy source of coalfired power plants, but the following problems still exist: When the pulverized coal obtained by the coal mill is burned in a furnace, the hightemperature flue gas produced will act on the working medium side of the heating surface in the way of heat transfer, and the ash in the hightemperature flue .
WEBApr 1, 2018 · Adv Powder T echnol 25(5):15 27 ... Lang et al. [17] conducted experiments to study the heat and mass transfer of liquid N 2 in coal and measured the temperature variation during the liquid N 2 ...
WEBNov 15, 2019 · In this study, a fully coupled electromagnetic, heat transfer and multiphase porous media model was developed to investigate the drying kinetics of coal under microwave irradiation. Results show that the temperature rise of coal during microwave irradiation is characterized by "fastslowfast", and water evaporation is the .
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