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Hairui Yang
Tsinghua University
Boiler (power generation)ChemistryCoalMechanicsFluidized bed combustion
153Publications
20H-index
1,225Citations
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Publications 131
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#1Miao Miao (THU: Tsinghua University)H-Index: 1
#2Hao Kong (THU: Tsinghua University)
Last. Man Zhang (THU: Tsinghua University)H-Index: 10
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Abstract Five types of available high-volatile fuels from different origins were burnt under a variety of operating parameters in bubbling bed to explore the emission characteristics of N2O and NOX. The main operating parameters studied were bed temperature, excess air ratio, fuel particle size, and bed material size. It was found that the N2O emission decreased as the temperature increased while the NOX emission was incompletely the same. Both the N2O and the NOX emissions increased with the in...
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#1Dongfang Li (PNU: Pusan National University)H-Index: 1
#2Xiwei Ke (THU: Tsinghua University)H-Index: 2
Last. Chung-Hwan Jeon (PNU: Pusan National University)H-Index: 17
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Abstract The world's first 550 MWe ultra-supercritical circulating fluidized bed (CFB) boiler designed with integrated recycle heat exchangers (INTREX) commenced operation in 2016. One of the distinguishing features of the INTREX is the internal circulation opening (ICO) that allows the particles in the furnace to flow into the INTREX to enhance the bed-to-tube heat transfer, while the heat transfer is strongly affected by both the mass flow rate of internal circulation m ˙ i c and particle size...
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#1Tao Wang (THU: Tsinghua University)H-Index: 18
#2Hai Zhang (THU: Tsinghua University)H-Index: 19
Last. Junfu Lv (THU: Tsinghua University)H-Index: 9
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ABSTRACT The circulating fluidized bed (CFB) roasting process is a promising way to utilize pyrite concentrates (PCs) which are byproducts in nonferrous metal production processes. The oxidation mechanism of PCs was investigated under typical CFB roasting conditions with the temperature of 850 °C and oxygen concentration of 1%-21% on a drop tube furnace. The oxidation reaction pathway and products of PCs are strongly coupled with particle morphology evolution, which affects the oxygen diffusion ...
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#1Yiran Li (THU: Tsinghua University)H-Index: 1
#2Runxia Cai (THU: Tsinghua University)H-Index: 6
Last. Junfu Lyu (THU: Tsinghua University)H-Index: 6
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Abstract Limestone particle size has a significant influence on the desulfurization effect in CFB boilers. However, few studies have focused on the effects of particle sizes under different conditions. As a result, many existing sulfation models have deficiencies in predicting the sulfation process of limestones with a broad range of particle sizes. In this paper, the sulfation process of limestone with a broad range of particle sizes was investigated under different SO2 concentrations, CO2 conc...
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#1Yiqun HuangH-Index: 3
#2Yiran LiH-Index: 1
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#1Huiren Xiao (THU: Tsinghua University)
#2Man Zhang (THU: Tsinghua University)H-Index: 10
Last. Junfu Lyu (THU: Tsinghua University)H-Index: 6
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Abstract The bottom ash cooler is an important auxiliary equipment of a circulating fluidized bed (CFB) boiler. As the CFB boiler technology develops, the rotary ash coolers have partially substituted the fluidized bed bottom ash coolers in the industrial practice due to its excellent reliability. To meet the increased output requirement, a double-cylinder rotary ash cooler, rather than the conventional single-cylinder one, was proposed in the present study. This paper provided the design of the...
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#1Jingyu Wang (THU: Tsinghua University)H-Index: 1
#2Hairui Yang (THU: Tsinghua University)H-Index: 20
Last. Guangxi Yue (THU: Tsinghua University)H-Index: 18
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Abstract The particle-wall collision behaviors are important to gas-solid separation, a common process in the energy and chemical industries. To model such collisions in simulations, the impulsive equations involving the restitution and friction coefficients are commonly used, with a virtual wall to address the abnormal rebound behaviors for grazing impacts. In the present work, this model was analyzed and compared with experimental data of spherical and non-spherical particles. The results show...
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#1Tao Wang (SDU: Shandong University)H-Index: 2
#1Tao Wang (SDU: Shandong University)
Last. Zhiqiang Wang (SDU: Shandong University)
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Abstract The thermal effects of five coal types' pyrolysis processes at heating rates of 5, 10, 15, 20, and 30 °C/min in the temperature range of 30–1000 °C were systemically investigated by thermogravimetric - differential scanning calorimetry. The experimental results show that coal pyrolysis process can be roughly divided into four stages, namely the drying and dehydration stage S1, the degassing stage S2, the pyrolysis stage S3, and the polycondensation stage S4. S1, S2, and S3 are endotherm...
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#1Lele Feng (THU: Tsinghua University)H-Index: 1
#2Hai Zhang (THU: Tsinghua University)H-Index: 19
Last. Hairui Yang (THU: Tsinghua University)H-Index: 20
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Abstract The classification performance of model coal mill classifiers with different bottom incoming flow inlets were experimentally and numerically studied. The flow field adjacent to two neighboring impeller blades were measured using the particle image velocimetry technique. The results showed that the flow field adjacent to two neighboring blades with the swirling inlet was significantly different from that with the non-swirling inlet. With the swirling inlet, there was a vortex located bet...
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#1Jingyu Wang (THU: Tsinghua University)H-Index: 1
#2Man Zhang (THU: Tsinghua University)H-Index: 10
Last. Guangxi Yue (THU: Tsinghua University)H-Index: 18
view all 6 authors...
Abstract The particle-wall collision behavior for non-spherical particles has significant effects on gas-solid separation, which is important in mechanical, energy and other industries. Particle-wall collision experiments of spherical and non-spherical glass particles with polished and rough walls were conducted. The collision velocities were measured by high-speed photography, and the effects of particle sphericity and wall roughness were analyzed. The results show for large impact angles α1, t...
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