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Journal of Renewable Materials 2021年第7期9卷 1329-1343页

作者： Jiekun Zhu hongtao kao College of Materials Science and Engineering Nanjing Tech UniversityNanjing211816China

Based on the theory of computational fluid dynamics(CFD),pulverized coal combustion alone,and the co-combustion of pulverized coal and refuse-derived fuel(RDF)in a Trinal-sprayed calciner(TTF)precalciner were *** results revealed that when coal was used as a single fuel,the velocity field in the precalciner had good symmetry,and formed three spray effects and multiple recirculation *** main combustion zone was distributed in the lower tertiary air and pulverized coal area,and the highest temperature reached up to 1,500 *** to the simulation results,the predicted decomposing rate of raw meal was 90.12%,which is in good agreement with the actual measured *** addition,with the increase in RDF content,the average temperature of the furnace,the decomposition rate of the raw meal,and the NO_(x) concentration all exhibited a downward *** the condition of ensuring the normal operation of the precalciner,blending with 20%RDF is the most reasonable strategy,and the NO_(x) emissions decreased by approximately 16%.

关键词： Numerical simulation TTF precalciner RDF co-combustion NO_(x)emission

Numerical Simulation of Sludge Combustion in TTF Precalciner

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Journal of Renewable Materials 2021年第4期9卷 671-693页

作者： Penghui Wang hongtao kao College of Materials Science and Engineering Nanjing Tech UniversityNanjing211816China

The research method of computational fluid dynamics(CFD)is used to study the technology of burning sludge in cement *** simulation results show that the flow field in the TTF precalciner is stable,the spray effect is good,and no raw meal collapse *** special structure of the TTF(Trinal-sprayed)precalciner allows the pulverized coal and sludge to fully exchange heat with the flue gas and *** there is no sludge burning in the furnace,the decomposition rate can reach 92.1%,and the maximum temperature of the precalciner can reach 1600 *** the moisture content of the sludge is constant,as the amount of sludge increases,the overall furnace temperature shows a downward trend and the minimum temperature at the precalciner outlet can be reduced to 1080 *** phenomenon shows that sludge has a great influence on furnace *** order to ensure that the decomposition rate of the raw meal is not less than 85%,the decomposition rate of the raw meal under different conditions is *** was found that the sludge input can be about S-20%when the mositure content of the sludge is 50%.Moreover,when the water content of the sludge is 60%,the burning amount of sludge cannot be higher than S-20%,which ensures the normal decomposition of *** addition of sludge reduces the temperature in the precalciner and further inhibits the generation of thermal NO_(x).The reduction of CO content produced by incomplete combustion of pulverized coal indicates that CO suppresses the production of fuel-type NO_(x).The NO_(x) concentration at the gooseneck is as low as 522 mg/***,it was also found that when the sludge input is fixed,the NO_(x) concentration decreases with the moisture content of the sludge increasing,indirectly proving the inhibitory effect of H2O on NO_(x).

关键词： Sludge combustion numerical simulation TTF precalciner NO_(x)reduction

Numerical Simulation of Urea Based SNCR Process in a Trinal-Sprayed Precalciner

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Journal of Renewable Materials 2021年第2期9卷 269-294页

作者： Yu Liu hongtao kao College of Materials Science and Engineering Nanjing Tech UniversityNanjing211816China

In order to study the combustion characteristics,NOx emission and NH3 slip in a new trinal-sprayed precalciner,the simulations of combustion and aqueous urea solution based selective non-catalytic reduction(SNCR)process were conducted by computational fluid dynamics in this precalciner,the effects of different injection heights,different injection flow rates and stratified injection under different flow rates on SNCR process were *** results showed that the flow field was symmetrically distributed in the precalciner,and the flue gas from the rotary kiln formed the recirculation region on both sides of the cone body,which increased the residence time of the solid *** temperature was mainly between 1100 K and 1250 K in the middle and upper column of the precalciner,which met the demand of the pulverized coal combustion and raw material *** concentration of NO at the outlet of the precalciner was 559 ppm,moreover,different injection heights and different injection flow rates had a strong influence on NOX removal efficiency and NH3 *** aqueous urea solution should be injected at SNCR-1 to prolong the residence time of NH3,and injection flow rate had an optimal flow rate but not the higher the *** the injection flow rate under stratified injection was 0.019 kg/s,which could play a better optimization role on NO removal efficiency on the basic of the injection flow *** consideration of cost effective,a stratified injection with an injection flow rate of 0.019 kg/s and an injection height of 20 m,25 m and 30 m was suggested as a compromise of a satisfactory NOx reduction rates and reasonable NH3 *** this condition,numerical simulation result showed that NOx concentration at the outlet of precalciner was 297.27 mg/Nm3 and NH3 slip was 4.67 mg/Nm3,meeting emission standard.

关键词： Trinal-sprayed precalciner selective non-catalytic reduction aqueous urea solution NOx reduction

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旋风预热器连接风管的分析

硅酸盐学报 2000年第6期28卷 516-518页

作者：考宏涛陆雷李敏南京化工大学材料科学与工程学院南京210009 东南大学材料科学与工程系南京210096

运用火用分析方法 ,从旋风预热器系统连接风管的传热与流动的特点出发 ,推导出管道内气体与管壁间换热量的能级表达式 .结果表明 ,管道内最佳气体速度与气壁温差密切相关 .结合工厂实际生产数据 ,分析了各连接风管的设计 .

关键词：水泥 YONG 连接管道设计旋风预热器风管

膨胀石墨/石蜡复合相变材料相变过程的热分析

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材料导报 2011年第4期25卷 131-133,137页

作者：吕学文考宏涛李敏南京工业大学材料科学与工程学院南京210009 东南大学江苏省土木工程材料重点实验室南京211186

利用膨胀石墨的层状结构及其高热导率制备了膨胀石墨/石蜡复合相变储能材料。采用层状复合材料的热传导模型,通过ANSYS软件对膨胀石墨/石蜡复合相变材料的相变过程进行数值模拟。结果表明,与纯石蜡相变材料相比,膨胀石墨/石蜡复合相变... 详细信息

利用膨胀石墨的层状结构及其高热导率制备了膨胀石墨/石蜡复合相变储能材料。采用层状复合材料的热传导模型,通过ANSYS软件对膨胀石墨/石蜡复合相变材料的相变过程进行数值模拟。结果表明,与纯石蜡相变材料相比,膨胀石墨/石蜡复合相变材料中加入膨胀石墨的强化传热性能效果很显著。

关键词：膨胀石墨石蜡相变材料数值模拟热分析

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钙基吸收剂碳酸化实验研究

煤炭转化 2012年第2期35卷 85-88页

作者：任斌考宏涛李爱莉南京工业大学材料科学与工程学院南京硕士生210009

对CaO吸收CO2反应的特性进行了实验研究,采用未反应收缩核模型分析碳酸化反应动力学特性.结果表明,化学反应速率常数在650℃～750℃范围内基本为一常数,产物层扩散系数随着温度的增加而增大.化学反应控制段的活化能Ea=29.70kJ/moL,产物... 详细信息

对CaO吸收CO2反应的特性进行了实验研究,采用未反应收缩核模型分析碳酸化反应动力学特性.结果表明,化学反应速率常数在650℃～750℃范围内基本为一常数,产物层扩散系数随着温度的增加而增大.化学反应控制段的活化能Ea=29.70kJ/moL,产物控制段的活化能Ea=92.80kJ/moL.温度一定时,随着CO2体积分数增加,碳酸化反应速率加快,转化率增大.

关键词：碳酸化 CaO 反应动力学活化能

EFFECTS OF THE PARTIAL PRESSURE OF CARBON DIOXIDE ON THE CALCINATION OF CALCIUM CARBONATE UNDER SUSPENSION IN CALCINER

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EFFECTS OF THE PARTIAL PRESSURE OF CARBON DIOXIDE ON THE CAL...

第四届北京国际水泥与混凝土会议

作者： kao hongtao, Lu Lei and Hu Daohe Department of Material Science and Engineering, Nanjing University of Chemical Technology Nanjing. China, 210009

Based on the combustion and calcination kinetics equtions, and the practical parameters of cement plant, the degree that the partial pressure of carbon dioxide in two kinds of calciner affects the calcination of calci...

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回转窑内气体和物料温度分布的研究

材料导报 2012年第24期26卷 108-111,128页

作者：李爱莉考宏涛郭涛任斌南京工业大学材料科学与工程学院南京210009

为进一步探索回转窑的优化设计及经济运行情况,在已有的回转窑传热研究的基础上,将其内部的传质过程与对流、辐射、传导3种热交换方式相结合,建立了计算回转窑温度分布的综合数学模型,预测了窑内烟气、物料及窑内壁的温度分布,并对某厂... 详细信息

为进一步探索回转窑的优化设计及经济运行情况,在已有的回转窑传热研究的基础上,将其内部的传质过程与对流、辐射、传导3种热交换方式相结合,建立了计算回转窑温度分布的综合数学模型,预测了窑内烟气、物料及窑内壁的温度分布,并对某厂回转窑进行数值计算。结果表明:在距窑头约14m处,气体温度达到最高值,约为1760℃,物料温度约为1465℃,随后气体和物料温度沿窑长逐渐下降,到达窑尾处时分别降至约1028℃和856℃。计算结果与实际运行结果吻合较好,说明该模拟方法具有一定适用性。

关键词：回转窑数学模型温度分布表面温度

微乳法制备Fe-DMC催化剂用于CO_2与环氧丙烷聚合

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合成树脂及塑料 2015年第2期32卷 15-18页

作者：马苏川房晶瑞汪澜考宏涛南京工业大学材料科学与工程学院江苏省南京市210009 中国建筑材料科学研究总院绿色建材国家重点实验室北京市100024

采用微乳法制备了铁锌双金属氰化物(Fe-DMC)催化剂,改变破乳时间获得不同形态的Fe-DMC催化剂。破乳时间为4h时制备的Fe-DMC催化剂催化CO2与环氧丙烷(PO)共聚合,在80℃,4MPa条件下,所制共聚物中CO2固定率为44%,脂肪族PPCP的摩尔分数为99%... 详细信息

采用微乳法制备了铁锌双金属氰化物(Fe-DMC)催化剂,改变破乳时间获得不同形态的Fe-DMC催化剂。破乳时间为4h时制备的Fe-DMC催化剂催化CO2与环氧丙烷(PO)共聚合,在80℃,4MPa条件下,所制共聚物中CO2固定率为44%,脂肪族PPCP的摩尔分数为99%,且共聚物数均分子量达9.20×104,相对分子质量分布仅为1.03,均优于用沉淀法制备的Fe-DMC催化剂催化CO2与PO共聚合。当破乳时间增加到9h,产物中出现大量的环状碳酸酯,数均分子量下降,且相对分子质量分布增大。

关键词：聚碳酸酯微乳法铁锌双金属催化剂破乳时间

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旋风筒的分级分离效率与其入口风速的关系

硅酸盐学报 1999年第4期27卷 415-419页

作者：陆雷考宏涛白崇功吕鸿南京化工大学材料科学与工程学院

探讨了旋风筒的分级分离效率、切割粒径与其入口风速的关系，并对试验数据进行拟合处理，得到了分级分离效率与入口风速的关系式。

关键词：分级分离切割粒径入口风速旋风筒水泥窑