The cracking behavior of lignite during drying–wetting cycles impacts the efficiency of coal mining, underground coal gasification, and coalbed methane development. Lignite is known to have high water content, and it exhibits strong hydrophilic properties, resulting in a weak and rigid gel structure caused by water interactions with coal matrix molecules. Even at …
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WhatsApp: +86 18221755073When the lignite dryer machine works, wet lignite is fed into the crushing equipment firstly. Then low-temperature four-stage drying process is introduced and dries the wet lignite to the …
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WhatsApp: +86 18221755073ABSTRACT Thermal runaway is a critical feature of microwave lignite drying, which leads to the combustion of lignite. An expert control system (ECS)-based multimode hybrid switching control strategy is developed to solve it. The control strategy has three control modes, which contain two proportional integral derivative modes and a zero mode. Two knowledge …
WhatsApp: +86 18221755073A new solar-aided power generation system is proposed. It is based on the unique characteristics of non-concentrating and concentrating solar energy applied to lignite drying. In the new system, solar energy cascade utilisation is achieved by the two-stage solar drying of lignite. Solar irradiance, especially diffused irradiance, can be efficiently used in the new …
WhatsApp: +86 18221755073Lignite coal, also known as brown coal, is a type of low-grade coal with a relatively low carbon content, typically ranging from 25% to 35%. It is usually obtained through open-pit mining, …
WhatsApp: +86 18221755073The moisture content of low-rank coal is one of the most critical properties in coal-fired power plant operation (Luo, Zhang, and Chen 2017;Phiciato and Yaskuri 2019;Yu et al. 2013).
WhatsApp: +86 18221755073The evaporated moisture as vapor is exhausted from the dryer in the same direction as the lignite. During the drying process, the sensible heat and the heating value of lignite are improved obviously. CV4 and CV5 are the boiler and turbines respectively in the traditional lignite-fired power plant, which is a 600 MW supercritical condensing and ...
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WhatsApp: +86 18221755073Upgradation of the rank of lignite is mandatory for its effective utilization as a potential energy source. Microwave drying is being explored in the present work as an effective upgradation technique. The effects of operating variables such as sample mass, particle size and sample thickness were investigated. The work also attempts to compare the quality of lignite …
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WhatsApp: +86 18221755073Low-Cost Solar-Aided Lignite Drying and Pow er Generation System (C. Chan, Gulkarni) Using Data-Driven Approaches," i n IEEE Transactions on Intelligent Transportation Systems, vol. 19, no. 12 ...
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WhatsApp: +86 18221755073Growing global demand and utilization of fossil fuels has elevated wealth creation, increased adverse impacts of climate change from greenhouse gases (GHGs) emissions, and endangered public health. In most developing countries, biomass wastes, which include but are not limited to agricultural residues, are produced in large quantities annually. They are either …
WhatsApp: +86 18221755073ABSTRACT The physical and chemical changes of three different types of lignite during drying at temperatures from 80 to 180°C were investigated using a moisture meter and an infrared spectroscopy system. The results showed that the drying of lignite could be classified into two stages, namely, a fast upgrading stage where surface moisture was lost, and a slower …
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