WEBFeb 1, 2013 · The use of biomass dust as a fuel in reciproing engines could be of great interest because it could combine the versatility of the ICE with the large availability and the CO 2neutral impact of biomass, with respect to coal, (see Table 1) biomass fuels generally have a lower ash and sulphur content (and ash can be easily removed by .
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WEBMar 1, 2021 · To improve the wettability effect of coal seam water injection, and reduce dust production from the source, this paper proposes the preparation of three kinds of highefficiency wetting enhancers.
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WEBFeb 1, 2018 · On this basis, the high and low pressure combined coal seam water injection technique was designed and applied to the #1305 fully mechanized top coal caving face in the Dongtan coal mine, and dust ...
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WEBJan 10, 2018 · The implementation of coalseam water injection can change the physical and mechanical properties of coal, can improve the coal storage limit, prevent and control rock burst, prevent coal and gas outburst, and reduce dust concentration in .
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WEBApr 12, 2022 · The process of water injection in coal seams describes the permeation behavior caused by the action of ground stress and water injection pressure. To study how ground stress and water injection pressure affect water expansion in the coal seam, based on the correlation between the electrical conductivity of coal and its water content, this .
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WEBFeb 1, 2022 · In the process of coal seam water injection, the liquid first flows into the coal mass along the large fissures existing in the coal mass under the action of pressure. ... dust concentration and dustdispersionair pressure on minimum ignition temperature and combustion process of coal dust clouds in a GG furnace. Fuel, 227 () (2018), pp ...
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WEBApr 10, 2020 · Abstract The article considers a mathematical model of the combustion zone of a blast furnace working with the use of the injection of coaldust fuel. In this model, two subsystems were identified: (1) subsystem of heating the particles of coal dust and volatiles released in the combustion zone; (2) subsystem of heat exchange and .
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WEBFeb 23, 2023 · The wetting behavior of droplets during impacting coal surface widely exists in the dust control process. Understanding the effect of surfactants on the diffusion of water droplets on coal surface ...
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WEBJan 15, 2022 · The propagation process of CH 4 /coal dust flames is complied, since it contains many chemical and physical phenomena and mechanisms [24, 25]. ... Turbulent unvented gas explosions under dynamic mixture injection conditions. Symp (Int) Combust., 23 (1) (1991), pp. 851858.
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WEBApr 1, 2023 · Such structure is also conducive to adsorption of coal dust and reduction of coal dust production. In addition, this method enriches the preparation method of water injection material and provides a new preparation scheme of wettabilityincreasing agent.
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WEBSurfactant can improve the wettability of water to coal, which is beneficial to reduce the production of coal dust in coal seam water injection. Through the measurement and calculation of contact angle and its decay rate, the wettability differences of SDS (C 12 H 25 OSO 3 Na), AES (C 14 H 29 O 5 NaS), OP10 (C 18 H 30 O 10 ), and JFC (RO(CH 2 ...
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WEBJan 19, 2024 · Coal seam water injection is a widely employed strategy to mitigate dust in coal mines, and the effectiveness of water injection is intriely linked to the internal pore and fracture structure of the coal. During the process of coal mining, the stress induced by mining activities has a significant impact on the pore and fracture structure of ...
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WEBMar 1, 2023 · To solve the problem of water injection in low–porosity and low–permeability coal seams, a new idea of liquid CO 2 cyclic cold soaking to improve the water absorption and wetting efficiency of coal is proposed. The evolution of the pore structure and mechanical properties of coal were studied using low–field nuclear magnetic resonance .
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WEBAs shown in Fig. 1, it is the device used in this experiment to test the ignition process and explosion propagation of industrial dust, also known as the Hartmann tube internationally, it is drawn using the 3D modeling software experimental system mainly consists of transparent glass tube, ignition electrode, diffuser, air compressor, and .
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WEBMar 1, 2021 · However, there are few researches on the dust suppressant for coal seam water injection. Coal seam water injection which use high pressure to inject water into the cracks of coal seam is an indispensable process for underground mining and is of great significance in the prevention and control of dust, gas, impact ground pressure, thermal .
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WEBApr 25, 2012 · Smelting in two different blast furnaces is considered on the basis of a multiband model, which relates the processes that affect the smelting conditions to the final outcome. The analysis focuses on conditions in which the coaldust consumption varies widely, as well as the distribution of materials over the furnace radius. New results and .
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WEBMar 5, 2022 · At this time, the coal dust has polluted the mine environment and it is difficult to control the breathing dust to a safe level in this way [9]. The other is to prevent coal dust before it is produced, such as coal seam water injection. Before coal mining, pressurized water is injected into the coal seam in front of the working face [10].
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WEBSep 1, 2019 · The injection pressure of the dust can be varied from 0 to bar, and the volume of the constanttemperature furnace is 220 mL. Download : Download highres image (228KB) ... Experimental process. The MITs of coal dust clouds were determined according to the measurement procedures defined in EN ISO/IEC .
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WEBJan 5, 2023 · Coal seam water injection, as an important disaster prevention means in the process of coal mining, can effectively suppress coal dust, add water injection additives, can effectively improve the ...
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WEBDOI: / Corpus ID: ; Multifactor numerical simulation study on spray dust suppression device in coal mining process article{Xu2019MultifactorNS, title={Multifactor numerical simulation study on spray dust suppression device in coal mining process}, author={Changwei Xu and Wen Nie and .
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WEBNov 10, 2011 · As flowrate increases, the entrainment of coal dust into the pipe increases due to increased venturi effect. This is shown in Fig. 5, where the mass of dust injected (grams per minute) is plotted as a function of the airflow rate in gpm. The variation of the coal dust injection rate is nonlinear for air flowrates up to gpm. After this ...
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WEBMay 1, 2022 · Pulverized coal injection (PCI) is generally used in modern blast furnace (BFs) ironmaking to reduce coke consumption by burning cheaper coal. ... (CROG) after CO 2 and dust removal, which mainly consists of CO and H 2, is proposed to be injected into an industrial BF operated with different oxygen enrichments. Such a process is .
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WEBJun 15, 2023 · 1. Introduction. Coalfired power generation is an important approach to supply energy [1].And Coalfired power stations supply over 70 % of the electricity in China [2].However, large amounts of pollutants (, particulate matter (PM), nitrogen oxides (NO x), and sulfur oxides (SO x)) are generated by combustion in coalfired, flue .
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WEBJul 1, 2022 · Coal seam water injection is one of the important means of mine disaster prevention, which helps to restrain the production of dust and reduce gas concentration. Ionic surfactant can change the capillary force of water in coal pore fissures, so as to enhance the wetting effect of coal seam water, the research on the .
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WEBSteps in the process are (1) mining of the coal from nearsurface or deep mines, (2) transporting crushed coal several centimeters in size to the power station, (3) pulverizing the coal to a powder predominantly less than 100 μ m in size, (4) pneumatically transporting this coal dust with combustion air into a large combustion chamber with ...
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