煤质对Texaco气化装置运行的影响及其选择(上)

介绍了水煤浆加压气化适宜的煤种，对煤质的要求和煤质对Texaco气化装置运行的影响及其选择适应性。论述了Texaco煤气化工要求的最关键因素是煤灰的熔融性，腐蚀性，粘温特征和煤的成浆性，反应性等。提出了煤质评价及优化开发原料煤的方法。介绍了配煤，配焦在Texaco煤气化工艺中应用的新技术。分析了陕西渭化，山东鲁化的Texaco煤气化装置原料煤的开发及试验过程，总结了开发经验，为Texaco煤气化装置工业化应用原料的开发提供理论依据和选择方法。     

提高腐殖酸煤棒质量 改进工艺条件提高单炉气量

本文根据我厂对腐殖酸煤棒使用的情况，通过对腐殖酸煤棒理化特性及气化原理的分析，提出了因地制宜改进和提高腐殖酸煤棒质量的几项措施及根据腐殖酸煤棒的特性和特点选择确定工艺条件的基本原则。     

煤中无机矿物对其加工和洁净利用的影响

本文阐述了煤中无机矿物对煤炭分选，水煤浆生产以及煤炭燃烧，气化，液化过程的不同，说明，无机矿物对煤的加工和洁净利用，既有不利影响，同时又有可利用之处，指出，研究煤中无机矿物对煤炭加工和洁净利用的影响，不仅能为用户合理选择原料煤提供科学依据，而且有助于降低加工成本和洁净利用费用。     

煤有机硫赋存形态模拟与微生物脱硫研究进展

分析了煤的有机质结构和煤中有机硫赋存形态的复杂多样性，依据煤化学结构模型的预示以及煤化程度加深对芳核缩合程度增加的基本规律，探讨了模型化合物选择的理论依据及其规律性，归纳了微生物降解煤中有机硫的三种典型机理，综述了DBT，NTH，BTH和BMS等模型化合物及其部分衍生物微生物脱硫的研究进展，提出了运用多模型化合物选育降解煤中有机硫的微生物、多菌群复合培养和单一菌株广谱脱硫性能研究的新理念，展望了微生物脱硫技术的工业可行性．     

立窑优化配料探索(连载六)

立窑优化配料第四步程序是配煤设定，包括煤种煤质选择、配煤量、煤粉制备工艺要求等内容，配煤应该是配料设计最重要的环节，原本有许多大文章可做，可惜因为迄今对立窑煅烧机制缺乏透彻详细的研究，可引为配煤依据的理论指导和实践经验都太少，该怎样做混沌不清，使配煤实施带有很     

煤与渣油的相互作用与对轻质产物的影响

对3种煤、5种石油渣油单独加氢及共处理液体产物中220℃－320℃馏分的族组成及产率进行了研究，结果表明，3种煤单独加氢所得的馏分中二环芳烃含量居多，其次为一环，而烷烃的含量较少，由于渣油性质的不同，5种渣油单独加氢后的馏分的族组成表现不一，总的来说，其馏分的产率，以及馏分中的烷烃，一环芳烃含量较煤单独加氢处理的结果要高，煤与渣油共处理结果偏离子两者单独加氢处理结果的算术加和值，说明加氢处理反应时，煤与渣油之间存在着明显的相互作用，这些作用随共处理时所选择的煤与渣油的种类不同而不同，通过对煤与渣油种类的选择，通过共处理可得到不同质量的馏分。     

新型煤气化炉内温度场影响因素研究

采用电热还原的方法将固体煤转化为可燃气体（煤气），为煤的气化提供了一条新思路．通过研究煤新型气化炉内温度场的成因以及各因素对温度场的影响，获取了不同高度空间温度场的主控因素．实验结果表明，气化功率、煤的种类、集气罩材料和排气速率等对气化炉内温度场均有较大影响；气化炉内的炉表近区域温度场主要由辐射场控制，集气罩近区域温度场受对流场控制．研究成果为煤新型气化温度场控制和气化炉经济密封高度的选择提供了依据．     

木里煤炼焦工业试验与工艺选择评价

通过青海木里煤炼制改良焦的工业试验与土焦生产实际测试结果的比较，对木里煤采用改良焦工艺生产高质量冶金焦的技术经济可行性进行了分析评价，并论证了ＣＤ９１－ＩＩ型焦炉是木里煤改良焦生产的最佳工艺选择     

地质成岩理论在选择立窑水泥原料中的应用（下）

4．3以地质成岩理论来选择燃料煤煤选择得如何，对立窑烧成有很大影响。我们选用过北京、云南、安徽、湖南、湖北、江西、山西等煤种在浙江诸暨云石等11家厂做过煅烧对比试验，明显感觉到山西煤好烧。把山西晋城煤与福建龙岩煤比较，龙岩煤又明显比晋城煤好烧，t熟料烧成煤耗要     

我国动力配煤灰熔融性可加性的研究

为考虑我国动力配煤中灰熔融性的可加性，分别选择了１０个单煤与配煤的灰熔融性结果进行了统计分析，找出了影响灰熔融性可加性的因素，并对其可加性规律进行了探讨。     

CFD modeling of MPS coal mill with moisture evaporation

Coal pulverizers play an important role in the functioning and performance of a PC-fired boiler. The main functions of a pulverizer are crushing, drying and separating the fine coal particles toward combustion in the furnace. It is a common experience that mill outlet pipes have unequal coal flow in each pipe and contain some coarse particles. Unequal coal flow translates into unequal air-to-fuel ratio in the burner, deviating from the design value and thus increasing unburned carbon in fly ash, NO_x and CO. Coarser particles at the mill outlet originate from poor separation and decrease the unit efficiency. In addition, coarser particles reduce burner stability at low load. Air flow distribution at the mill throat, as well as inside the mill, significantly influences the mill performance in terms of separation, drying, coal/air flow uniformity at the mill outlet, wear patterns and mill safety. In the present work, a three-dimensional computational fluid dynamics (CFD) model of the MPS Roll Wheel pulverizer at Alliant Energy's Edgewater Unit 5 has been developed. The Eulerian-Lagrangian simulation approach in conjunction with the coal drying model in Fluent, a commercial CFD software package, has been used to conduct the simulation. Coal drying not only changes the primary air temperature but it also increases the primary air flow rate due to mass transfer from coal. Results of the simulation showed that a non-uniform airflow distribution near the throat contributes significantly to non-uniform air-coal flow at the outlet. It was shown that uniform velocity at the throat improves the air and coal flow distribution at the outlet pipes. A newly developed coal mill model provides a valuable tool that can be used to improve the pulverizer design and optimize unit operation. For example, reject coal rate, which is controlled by the air flow near the mill throat, can be reduced. The model can also be used to further aid in identifying and reducing high temperature or coal-rich areas where mill fires are most likely to start.     

等径棒球介质在煤磨中的应用

对比等径棒球介质与传统圆球介质在煤磨中使用情况,等径棒球研磨介质在增产、节能和提高粉体 制备质量等方面具有显著的技术经济效果,其具有广阔的推广应用前景。     

HP磨煤机磨制高水分印尼煤选型

根据高水分印尼煤的煤质特点,分析了HP磨煤机磨制高水分印尼煤时的技术特点,从研磨出力和干燥出力角度出发,详细论述了HP磨煤机的选型方法。通过实际工程HP磨煤机选型实践,得出HP磨煤机可以磨制收到基水分高达40%的印尼煤,研磨出力和干燥出力均能满足设计要求。     

供煤系统的改进和完善

回转窑喂煤系统喂煤量波动和跑煤的原因是:煤粉仓容量偏小;螺旋喂料机螺旋叶片磨损过大;螺 旋泵选型不合理;风量风压不足。根据以上原因实施相应的措施后,改造效果显著。     

Analysis of the kinetics of coal breakage by wet grinding in the szego mill

This paper deals with the mechanism of breakage of Pittsburgh coal in the Szego mill, for the preparation of coal-grade 2 oil and coal-water slurries. Following a brief introduction to the mill and its operation, the kinetics of coal breakage is discussed. The non-first-order breakage in the mill is due to material and environment effects.A two-component mechanistic model, considering the coal in a size interval to be composed of crushed feed particles and flaky particles, is used to explain the breakage. The selection functions for both components in various

size intervals are estimated from experimental data using an optimization technique. Finally, the variation of the selection functions with particle size is discussed.     

Fine ash formation during combustion of pulverised coal-coal property impacts

In many countries, legislation has been enacted to set guidelines for ambient concentrations and to limit the emission of fine particulates with an aerodynamic diameter less than 10 μm (PM₁₀) and less than 2.5 μm (PM_2.5). Ash particles are formed during the combustion of coal in pf boilers and fine ash particulates may potentially pass collection devices. The ash size fractions of legislative interest formed during coal combustion are the result of several ash formation mechanisms; however, the contribution of each of the mechanisms to the fine ash remains unclear. This study provides insight into the mechanisms and coal characteristics responsible for the formation of fine ash. Five well characterized Australian bituminous coals have been burned in a laminar flow drop tube furnace in two oxygen environments to determine the amount and composition of the fine ash (PM₁₀, PM_2.5 and PM₁) formed. Coal characteristics have been identified that correlate with the formation of fine ash during coal combustion. The results indicate that coal selection based on (1) char characterization and (2) ash fusion temperature could play an important role in the minimization of the fine ash formed. The implications of these findings for coal selection for use in pf-fired boilers are discussed.     

水泥窑系统烧劣质煤应注意的几个问题

水泥熟料烧成使用劣质煤经济可行,但应根据煤的特点采取相应的措施,不能忽视燃烧器、煤磨的选择,更不能忽视一次风温的影响。     

40kg炼焦试验在焦化生产中的应用

介绍40kg炼焦试验技术在柳钢焦化厂的应用,并将各项数据运用到配煤专家系统及焦炭质量的预测,在选择煤种、煤矿点及调整炼焦配比等方面取得预期效果。     

A 1/4 scale test facility for PF transport in power station pipelines

Coal fired power station efficiency affects the environment and cost of power. Pulverised fuel (pf) is conveyed from the mill to the furnace through a convoluted network of steel pipes with several junctions and the coal can be badly distributed between the burners. In order to simulate the behaviour of pf in the network and to provide a solution to this problem, a test facility has been constructed at the University of Nottingham. The rig provides air drawn through a 154 mm pipe, which then splits two or three ways. A number of bends prior to the junction point ensure an unbalanced distribution of powder in the downstream pipes. Conventional and novel techniques have been applied to quantify the mal-distribution.     

煤调湿应用于煤处理工艺的探讨

介绍了煤调湿技术的发展过程,对比三代煤调湿技术的差异,讨论了增设煤调湿装置对煤处理工艺流程带来的变化,为设计选用提供了参考。对导热油煤调湿、蒸汽煤调湿和气力分级煤调湿的4种实施方案进行了分析比较,提出了工程应用中需注意的问题。