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Production and combustion of hot-water-dried lignite ...

@article{osti_5964537, title = {Production and combustion of hot-water-dried lignite slurries}, author = {Hauserman, W B and Patel, R C and Willson, W G}, abstractNote = {Why should anyone consider making a coal-water slurry from lignites. They have high moisture levels, over 30%, and contain significant amounts of ash. On the positive side, lignites ignite easier, burn faster and are ...

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Production and combustion of hot-water dried low

Hot-water coal drying is a means of thermally beneficiating and dewatering lignite and subbituminous coal for the purpose of producing dense low-rank coal-water slurries. During hot-water drying, low-rank coal is treated at elevated temperatures (250/sup 0/ to 350/sup 0/C) and pressures in excess of the saturated steam pressures to minimize ...

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Adsorption of ammonia nitrogen on lignite and its ...

2019-2-15  Using lignite as an adsorbent and subsequently as a material for coal water slurry (CWS) preparation represents an alternative method for coal chemical wastewater treatment. However, the components in these wastewaters could affect the CWS performance, especially ammonia nitrogen (NH 4

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The Research of Coal-Water Slurry Fuel Ignition and ...

2015-10-17  The composition of coal-water fuel includes two components: coal or lignite fine particles and water or liquid industrial waste (industrial water). Furthermore, various combustible liquid wastes may be added to artificial composite liquid fuel in addition to the components typical for coal-water slurry fuel.

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Hydrothermal dewatering of lignite water slurries: Part

The lignite water slurry after hydrothermal dewatering becomes more stable than the raw lignite water slurry. We propose that the mechanism of the stability rendered by HTD is that the slurry after HTD formed aggregation networks (soft sediment) across the whole system that prevents coal particles from becoming hard sediment.

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Flow properties of coal-water slurries (Journal Article ...

Abstract. Properties of coal-water slurries were studied in two separate phases: a rheological phase and a pipeline phase. The primary purpose was to investigate the rheology of fine coal slurries, and the secondary purpose was to determine whether the energy requirements of a coal-water slurry pipeline could be predicted from the rheology data.

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Improving slurryability, rheology, and stability of slurry ...

2020-1-14  Keywords Petroleum coke Lignite Coal–water slurry Rheological characteristics Slurry stability 1 Introduction Petroleum coke is the main byproduct of the petroleum refining process, and it can be used for electrodes or fuel. Owing to a continuous demand for crude oil, the produc-tion of petroleum coke in China is increasing steadily

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Effects of hydrothermal dewatering of lignite on

2018-3-13  The viscosity of coal water slurry at the shear rate of 100 s −1 decreases with an increasing HTD temperature, which is probably due to the decrease of volume of lignite particles caused by the permanent reduction of both bound and non‐freezable water (inherent moisture) after the HTD process. The reduction of the inherent moisture of ...

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Effects of hydrothermal dewatering of lignite on

2018-3-13  The viscosity of coal water slurry at the shear rate of 100 s −1 decreases with an increasing HTD temperature, which is probably due to the decrease of volume of lignite particles caused by the permanent reduction of both bound and non-freezable water

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Coagulation and splitting of droplets of coal-water

2017-4-1  Ignition processes were studied for coal-water slurry containing petrochemicals based on a large group of components. In particular, we used pulverized lignite and coal as well as their typical derivatives after coal filtration at enrichment factories – filter cakes (jelly-like mixture of water and coal processing waste).

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Effect of Hydrothermal Dehydration on the Slurry

2021-4-30  Therefore, these changes of interfacial properties improved the slurry ability of lignite, with higher fixed-viscosity solid concentration, lower yield stress, increased pseudo-plasticity, and gradually decreased static stability of the prepared lignite coal water slurry. hydrothermal dehydration; slurry ability; oxygen-containing functional ...

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Ignition Characteristics of Coal–Water Slurry

2016-8-5  This paper examines a coal–water slurry containing petrochemicals (CWSP) based on lignite, bituminous coal, anthracite, and typical waste—carbon residue obtained from the pyrolysis of tires. Waste motor oil is used as a liquid fuel component of the slurry. The study of CWSP ignition is performed via placing a fuel droplet on a low-inertia thermocouple junction (junction diameter is 0.1 mm ...

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Comparing the ignition parameters of promising coal

2020-7-1  Here we compare the ignition and burnout parameters of lignite, bituminous coal, and anthracite particles, as well as slurry droplets. We also study the fire hazard of traditional fossil fuels and promising fuel types (coal-water slurry, coal processing waste, and waste-derived slurry). The micro-explosion of multi-component droplets is ...

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Physicochemical properties of Indonesian lignite ...

2015-6-15  Indonesian lignite was continuously modified in a tunnel-type microwave oven to improve its slurribility. The maximum solid concentration of coal–water slurry (CWS) prepared from modified lignite increased from 41.6 wt.% to 54.0 wt.% with an enhanced rheological behaviour.The contact angle, oxygen functional groups, molar ratio of methylene to methyl, paramagnetic centres of modified lignite ...

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Secondary atomization of single coal-water fuel

The evaporative behavior of single, well characterized droplets of a lignite coal-water slurry fuel (CWSF) and a carbon black in water slurry was studied as a function of heating rate and droplet composition. Induced droplet heating rates were varied from 0 to 10{sup 5} K/s.

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Improving slurryability, rheology, and stability of slurry ...

2015-1-20  Petroleum coke and lignite are two important fossil fuels that have not been widely used in China. Petroleum coke–lignite slurry (PCLS), a mixture of petroleum coke, lignite, water, and additives, efficiently utilizes the two materials. In this study, we investigate the effects of the proportion (α) of petroleum coke on slurryability, rheological behavior, stability, and increasing ...

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Coal-CO2 Slurry Feed for Pressurized Gasifiers: Slurry ...

2016-12-22  analyses. This work introduces the Phase Inversion-based Coal-CO 2 Slurry (PHICCOS) feeding system, in which coal-CO 2 slurry is prepared at ambient temperature via coal-water slurry. Steady-state process simulation is used to estimate the performance of the proposed slurry preparation and feeding system for bituminous coal and lignite. An

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Coagulation and splitting of droplets of coal-water

Coagulation and splitting of droplets of coal-water slurry containing petrochemicals and their effect on ignition characteristics. Geniy V. Kuznetsov, Pavel A. Strizhak. The Butakov Research Center; Research School of High-Energy Physics; Research output: Contribution to journal › Article › peer-review.

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How Rhenish lignite can reduce power plant mercury ...

For lignite-fired power plants, EPA acknowledged significant differences in Hg speciation and control options compared to hard coal, and as a consequence the MATS Hg emission limits for lignite are less stringent than for hard coal (lignite, 4.0 lb/ TBtu, or 5.0-5.4 μg/m3N; hard coal, 1.2 lb/ TBtu, or

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陈丹丹 讲师-首页_南师大能源与机械工程学院 - Nanjing ...

2020-12-12  The effect of anionic dispersants on the moisture distribution of a coal water slurry, Fuel Processing Technology, 2014, 126: 122-130. ⑩陈丹丹, *蒋旭光, 马增益, 严建华, 等. 印尼褐煤湿煤末(煤泥)壁面滑移和真实流变特性.

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Concentrated coal-water slurry from lignite via ...

The paper proposed to adopt coal-water slurry(CWS)gasification technology to solve the powder lignite-and wastewater-based constraints in the coal chemical industry. From the fixed-bed gasification unit of some coal-to-synthetic natural gas(SNG)plant, 5 sets lignite and 8 groups wastewater(W1—W8)were sampled and analyzed. Then each lignite was made directly or pretreatedvia hydrothermal ...

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Physicochemical properties of Indonesian lignite ...

2015-6-15  Indonesian lignite was continuously modified in a tunnel-type microwave oven to improve its slurribility. The maximum solid concentration of coal–water slurry (CWS) prepared from modified lignite increased from 41.6 wt.% to 54.0 wt.% with an enhanced rheological behaviour.The contact angle, oxygen functional groups, molar ratio of methylene to methyl, paramagnetic centres of modified lignite ...

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Mineral Concentrate Dryer, Mining Drying Machine

Bulkbuy Mineral Concentrate Dryer, Mining Drying Machine for Coal, Slurry, Lignite, Gypsum, Bentonite Clay price comparison, get China Mineral Concentrate Dryer, Mining Drying Machine for Coal, Slurry, Lignite, Gypsum, Bentonite Clay price comparison from Coal Dryer for Sale, Coal Slime Dryer manufacturers suppliers on Video Channel of Made-in-China .

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The Research of Coal-Water Slurry Fuel Ignition and ...

2017-1-22  Dmitrii Glushkov et al. / Procedia - Social and Behavioral Sciences 206 ( 2015 ) 295 – 300 299 Fig. 6. The dependence of the ignition delay time of coal-water slurry fuel (1 – the composition No. 3) and artificial composite liquid fuel (2 – the composition No. 4)

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Coagulation and splitting of droplets of coal-water

The coal-water slurries based on different types of coals and waste petrochemicals or other combustible liquids (CWSP) are very attractive for creation of cheap energetic fuel (for replacement of the coal and gas). Together with evident economic effect, the CWSP is perspective from ecological point of view.

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ISO Certificated Rotary Drum Dryer for Ore, Sand,

Bulkbuy ISO Certificated Rotary Drum Dryer for Ore, Sand, Lignite Coal Slime, Slurry price comparison, get China ISO Certificated Rotary Drum Dryer for Ore, Sand, Lignite Coal Slime, Slurry price comparison from Coal Dryer Manufacturer,Coal Powder Dryer manufacturers suppliers on Video

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CN101914401B - Method for preparing gasified coal

The invention discloses a method for preparing gasified coal water slurry by utilizing lignite, comprising the following steps: isolating the lignite which is taken as a raw material from air and heating at the temperature of 600-900 DEG C to obtain a lignite semicoke product suitable for preparing the coal water slurry, coal tar and retort gas; taking the lignite semicoke; grinding the ...

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Impact of coal quality and gasifier technology on IGCC ...

2021-1-6  4 the slurry feed, the higher is the need for energy to heat up the feed and vaporize water. The computations showed that 1) the cold gas efficiencies of gasification4 were reduced from 79.3 % for Coal 5 to 49.1 % for Coal 1, and that 2) the auxiliary power consumption was more than doubled for

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Fractal Theory of Grinding and Grading in Lignite Water Slurry

Uses the fractal theory to describe the size distribution of granular system after grinding during the process of making pulp of lignite.Carry on the fractal fitting by using laser particle size analyzer to measure the size distribution of granular system in different grinding ...

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陈丹丹 讲师-首页_南师大能源与机械工程学院 - Nanjing ...

2020-12-12  The effect of anionic dispersants on the moisture distribution of a coal water slurry, Fuel Processing Technology, 2014, 126: 122-130. ⑩陈丹丹, *蒋旭光, 马增益, 严建华, 等. 印尼褐煤湿煤末(煤泥)壁面滑移和真实流变特性.

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