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Simulation Research on coal-water slurry Gasification of Oil-Based Drill Cuttings Based on Fluent

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Energy Engineering 2023年第9期120卷 1963-1977页

作者： Liang Hu Hailong Yu Liuyang Huang Yayun Xu XuleiWu Yunlan Sun Baozhong Zhu School of Petroleum Engineering Changzhou UniversityChangzhouChina

In this paper,based on Fluent software,a five-nozzle gasifier reactor was established to simulate the gasification process of oil-based drill cuttings coal-water slurry.The influence of concentration and oxygen/carbon atomic ratio on the gasification process of oil-based drill cuttings coal-water slurry was investigated.The results show that when the oxygen flow is constant,the outlet temperature of gasifier decreases,the content of effective gas increases,and the carbon conversion rate decreases with the increase of concentration;When the ratio of oxygen to carbon atoms is constant,the effective gas content rises and the temperature rises with the increase of the concentration,and the carbon conversion rate reaches the maximum value when the concentration of oil-based drill cuttings coal-water slurry is 65%;When the concentration is constant,the effective gas content decreases and the outlet temperature rises with the increase of the oxygen/carbon atom ratio,and the carbon conversion rate reaches 99.80%when the oxygen/carbon atom ratio is 1.03.It shows that this method can effectively decompose the organic matter in oilbased drill cuttings and realize the efficient and cooperative treatment of oil-based drill cuttings.

关键词： Oil-base drill cuttings coal-water slurry gasification furnace numerical simulation fluent

Effect of the high-power electromagnetic pulses on the reactivity of the coal-water slurry in hot environment

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Chinese Journal of Chemical Engineering 2020年第12期28卷 3145-3151页

作者： M.V.Belonogov R.I.Taburchinov R.I.Egorov National Research Tomsk Polytechnic University TomskRussian Federation

An effect of the high-power electromagnetic pulses onto the droplet of coal-water slurry inside the furnace was investigated.In contrary to the previously investigated laser-induced fuel atomization that occurs at the room temperature,the pre-heated(to 400 K)slurry becomes dry enough to prevent the explosion-like steam formation.Thus,fuel does not atomize and the ignition does not accelerate.Furthermore,the absorption of several laser pulses leads to evident sintering of irradiated surface with following increase of the ignition delay time for up to 24%.Variation of the pulse energy in range 48-118 mJ(corresponding intensity up to 2.4 J·cm^-2)leads to certain variation of the increase of ignition delay.The strong pulsed overheating of the coal water slurry which does not initiate the fine atomization of the fuel generally makes its ignition longer.

关键词： Waste-derived fuels coal-water slurry Auto-ignition Ignition delay time High-power laser pulse

Combustion and Sulfur-fixing Performance of Pulping Black Liquor coal-water slurry

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Paper And Biomaterials 2017年第2期2卷 33-41页

作者： BaoNong Tian LianQing Huang JunHong Zhang FuShan Chen School of Chemical Engineering Qingdao University of Science and Technology QingdaoShandong Province 266042 China State Key Laboratory of Eco-Chemieal Engineering Qingdao Shandong Province 266042China

The effects of adding pulping black liquor and other additives to coal-water slurry(CWS) on the sulfur-fixing performance of the resultant mixture(pulping black liquor coal-water slurry) were evaluated. The experimental results demonstrated that the ash content of the black liquor coalwater slurry decreased as the addition of pulping black liquor in the mixture increased. Nevertheless, the addition amount should be appropriately selected to ensure that the black liquor coal-water slurry had a moderate calorific value. Addition of black liquor improved the combustion performance of CWS by lowering the ignition point and stabilizing the combustion process; moreover, the sulfur-fixation ratio after combustion increased by 12 to 16 percentage points than that of CWS, and the content of high-melting-point salt in the ash from CWS after adding black liquor was low. The sulfur-fixing ratio of CWS after adding a sulfur-fixing agent was effectively increased by 25 to 30 percenatge points, but with compromise of the fluidity and stability of the CWS; thus, the addition amount of a sulfur-fixing agent should be optimized.

关键词： pulping black liquor coal-water slurry combustion performance sulfur-fixing performance

Improving slurryability, rheology,and stability of slurry fuel from blending petroleum coke with lignite

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Petroleum Science 2015年第1期12卷 157-169页

作者： Jun-Hong Wu Jian-Zhong Liu Yu-Jie Yu Rui-Kun Wang Jun-Hu Zhou Ke-Fa Cen State Key Laboratory of Clean Energy Utilization Zhejiang University

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 petro- leum coke, lignite, water, and additives, efficiently utilizes the two materials. In this study, we investigate the effects of the proportion （7） of petroleum coke on slurryability, rheo- logical behavior, stability, and increasing temperature characteristics of PCLSs. The results show that the fixed- viscosity solid concentration （COo） increases with increasing 7. The ~Oo of lignite-water slurry （LWS, ~ = 0） is 46.7 %, compared to 71.3 % for the petroleum coke-water slurry （PCWS, c~ --- i00 %）, while that of PCLS is in between the two values. The rheological behavior of PCLS perfectly fits the power-law model. The PCWS acts as a dilatant fluid. As decreases, the slurry behaves first as an approximate Newtonian fluid, and then turns into a pseudo-plastic fluid that exhibits shear-thinning behavior. With increasing ct, the rigid sedimentation and water separation ratio （WSR） increase, indicating a decrease in the stability of PCLS. When α is 60-70 %, the result is a high-quality slurry fuel for industrial applications, which has high slurryability （ω0 = 57-60 %）, good stability （WSR 〈 2 %）, and superior pseudo-plastic behavior （n = 0.9）.

关键词： Petroleum coke Lignite coal-water slurry Rheological characteristics slurry stability