一种煤浆自动跟踪系统专利技术在GE水煤浆气化装置上的应用

简要介绍了一种煤浆自动跟踪系统的研发及应用情况,通过该专利技术在奎屯锦疆化工有限公司水煤浆气化炉上的成功应用,有效避免了因高压煤浆泵单缸甚至双缸不打量引发的气化炉跳车事故的发生,实现了气化炉安全、稳定和长周期运行的生产目标。     

煤浆自动跟踪系统在氧煤比调节中的应用

阐述了水煤浆气化装置在运行过程中,高压煤浆泵多次出现不打量造成气化炉过氧和跳车问题的分析和总结,通过采用煤浆自动跟踪系统,快速克服因煤浆泵不打量而造成的煤浆流量大幅扰动问题,达到气化炉安全稳定运行的目的。     

费托合成废催化剂蜡渣掺混对工业水煤浆成浆特性的影响

将蜡渣以不同比例掺入工业水煤浆中制备环保型水煤浆,可实现费托合成废催化剂蜡渣资源化、无害化处理。利用旋转流变仪测定浆体的最大成浆浓度、流变性等,借助Zeta电位仪定量分析添加蜡渣对于水煤浆稳定性的影响,使用FTIR表征煤、蜡渣颗粒表面的官能团,利用SEM和接触角测量仪对煤和蜡渣表面形貌和接触角进行分析,通过绘制蜡渣水煤浆的稳定分散图,探究蜡渣的掺混对成浆特性的影响机制。结果表明：随着蜡渣添加量的增加,浆体表观黏度增大,最大成浆浓度降低,水煤浆和蜡渣水煤浆都表现出剪切变稀的假塑性特征;加入蜡渣后,浆体的Zeta电位有所增大,蜡渣水煤浆的析水率与相同浓度的工业水煤浆的析水率相比区别不大;通过红外光谱仪及接触角分析仪分析可知,蜡渣表面活性差,疏水性强,进入水煤浆后,水会在蜡渣颗粒表面聚结,造成浆体中自由水损失,从而造成黏度增加,最大成浆浓度降低;同时由于煤表面形成了水化膜,其表面亲水,蜡渣表面疏水,在体系中二者不会发生团聚,所以蜡渣的加入对浆体的稳定性起到了一定的积极作用。     

伊泰煤、神府煤及其配煤的水煤浆成浆性比较与分析

通过伊泰煤、神府煤及其配煤的成浆性试验,在煤浆浓度、黏度和目测流动性等方面进行了比较与分析,并讨论了粒度级配对煤浆浓度的影响。结果表明,伊泰煤可以制得浓度和流动性均较好的水煤浆,制得的水煤浆粒度呈双峰分布,煤浆浓度较神府煤水煤浆略高。随着煤浆中粗粒子(8目~40目)的增加,煤浆浓度增加,但对水煤浆气化过程中大颗粒煤粉的碳转化率也有影响。     

超声处理对煤孔结构的扩孔作用及其对成浆性影响

选用大同、克州、红会、八一及神木等五种煤制备水煤浆,考察了对水煤浆浆体进行超声处理引起煤的孔结构分布的变化及其对水煤浆成浆性能的影响。在超声处理强度为80W／cm2、频率为20kHz条件下,五种媒的孔体积（1．7um～300um）普遍增大,由于煤的孔体积大小和吸水性有密切关系,二者的协同作用影响煤的成浆性。实验结果表明：煤的总孔体积和吸水性的乘积与成浆性存在着较好的线性关系。     

煤质及煤改质影响水煤浆性能的应用性试验

通过对不同煤种及不粘煤在不同条件下热处理后煤样制浆性能测量结果的分析,考察了不同煤种水煤浆性能的差别及煤热处理改质对成浆性能的影响。结果表明,焦煤成浆性能最好、瘦煤成浆性能和焦煤的接近;无烟煤成浆性能比焦煤和瘦煤差,不粘煤成浆性能最差。结果还显示,不粘煤热处理改质后能显著提高成浆性能,温度为375℃、处理时间为16 min时,热处理煤的成浆性能最好。     

浅析高压煤浆泵geho pums和feluwa的区别

高压煤浆泵是非常重要的用于水煤浆气化装置,其在系统中能否安全稳定的运行直接对气化装置的周期造成影响。因此在不同的运行环境下选择使用哪种高压煤浆泵显得尤为重要。本文基于geho pums以及feluwa两种高压煤浆泵,就他们之间的联系与区别进行探讨,总体得出feluwa高压煤浆泵的性能要胜过geho pums,希望能够为相关生产企业提供有价值的建议。     

制备高质量水煤浆的影响因素及操作控制

目前我国许多煤化工项目采用水煤浆加压气化工艺,而制备高质量的水煤浆是水煤浆加压气化工艺技术应用的关键。简介水煤浆加压气化工艺之煤浆制备流程及对水煤浆品质的要求,分析水煤浆制备质量的主要影响因素,并结合某厂GE水煤浆加压气化装置煤浆制备的生产实际,分析与探讨制备高质量水煤浆所需把控的原料煤煤质、煤浆添加剂配制及其添加量、磨煤机内钢棒级配、磨煤机进煤量与进水量调整等关键操控点,以便为业内提供一些参考与借鉴。     

掺配含油污泥对水煤浆浆体性能及燃烧性能的影响

将含油污泥与水、煤粉和分散剂混合制备含油污泥煤浆,并以水煤浆为参考,研究了掺配含油污泥对水煤浆浆体性能及燃烧性能的影响。利用SEM-EDX观察含油污泥、水煤浆和污泥煤浆表观形貌,分析了掺配含油污泥后浆体的定黏质量分数、流变特性及稳定性。使用热重分析对污泥、水煤浆及污泥煤浆进行热分析实验,结合TG-DTG曲线分析了水煤浆及污泥煤浆相关的燃烧特性指数。结果表明:萘系分散剂可以降低水煤浆和污泥煤浆的黏度,分散剂的最适宜添加量为煤干基的0.3%(质量分数);由于含油污泥特殊的絮状多孔结构,添加含油污泥后浆体稠度增大、定黏质量分数降低,但浆体的流变指数n值减小、析水率降低、Zeta电位绝对值增大,即浆体的假塑性和稳定性增强;添加含油污泥后煤浆燃烧速率增大,TG曲线向低温度区偏移,且污泥煤浆的S_w,R_w,C_b和S值等燃烧性能指数都要优于普通水煤浆的相应值,添加含油污泥促进了水煤浆的燃烧过程。     

高浓度气化水煤浆制备技术

水煤浆气化有效气含量与粉煤气化相比,有一定差距,主要原因是水煤浆浓度偏低,气化时带进多余的水而造成。提高水煤浆浓度是提高水煤浆气化有效气含量的关键。介绍了近年来国家水煤浆工程技术研究中心开发的气化水煤浆提浓新技术,包括分级研磨制浆技术和间断粒度级配制浆技术。介绍了两种制浆技术的原理及工艺流程,工业应用及中石化联合会的科技成果鉴定表明,与常规制浆工艺采用同种煤制备的煤浆浓度相比,分级研磨制浆技术煤浆质量分数提高3个百分点左右;间断粒度级配制浆技术煤浆质量分数提高6~8个百分点。     

汽车用灯头的注射模设计

针对汽车用塑料灯头的结构特点与工作环境,分析了灯头结构的复杂性、材料性能,注身工艺条件、合理地设计了注射成型模具,采用了组合式下模型芯来完成内孔的复杂成型,同时采用组合式侧抽芯来完成外侧面的卡钩与上面的穿线孔的成型,简化了模具的结构。     

新型气化型煤粘结剂

介绍一种新型气化煤粘结剂的制备方法和粘结作用机理，该粘结剂属有机粘结剂，粘结能力强，煤种适用范围广。制取的气化型煤机械强度高，灰份低，固定碳含量高。     

Criteria for the affinity of dyes for fibres

An equation was obtained for evaluating the thermodynamic affinity of a disperse dye for a fibre. Quantities Δh _D and K _D , which are functions of the composition of the dye bath, temperature, and state of the fibre material, can characterize the change in the affinity of the dye for the fibre when the dyeing conditions are varied.     

焊制三通雌雄样板计算机放样软件的开发

应用VC 语言开发了焊制三通雌雄样板放样软件,该软件能快速、准确地完成正三通、斜三通、顺流三通、Y型三通雌雄样板的放样工作。详细介绍了程序的编制过程以及软件的特点。     

Guidance for Mutual Disposition of Chromophores for Singlet Fission

The choice of chromophores and of their mutual geometrical arrangement for optimized singlet fission (SF) rates are considered. The electronic matrix element that enters the Fermi golden rule for the rate of SF is worked out algebraically for a simple model, but the density of states factor is not analyzed here. The model treats only the highest occupied and lowest unoccupied orbitals of the partners. It provides an approximate formula that requires only the knowledge of the expansion coefficients of these orbitals and of overlap integrals between atomic orbitals on the partners to obtain an estimate of the electronic matrix element. An illustrative application to a pair of ethylene molecules suggests that favored geometries will be those in which one of the AOs on the first ethylene overlaps with both AOs on the second ethylene, while the other AO on the first ethylene overlaps with at least one, and preferably both, AOs of the second ethylene as little as possible.     

Test procedure for evaluation of catalysts for nitrile reduction

A procedure was developed that examines the effectiveness of nickel catalysts for the hydrogenation of fatty nitriles to amines. Rates of reaction, selectivity, and olefinic reduction were the parameters studied. The procedure can be used for new catalyst screening and is ideally suited for quality assurance testing of production catalysts. It involves the reduction of nitriles to amines at 410°F (210°C) and 500 psig using a .2% Ni loading level. A mixture of primary and secondary amines is obtained which is characteristic of the catalyst’s selectivity. Both sponge and supported nickel catalysts were tested using tallow nitriles as the feedstock.     

Strategy for development of fertilizer solutions for greenhouse tomatoes

A study of fertilization practices in intensively grown tomatoes, leading to a projection of developments in fertilizer usage is presented. Targets of optimal fertilization strategy were defined as follows: maximize fruit yield; maximize fruit quality; minimize environmental pollution with fertilizers; minimize corrosion of the fertilizer distribution system; minimize expenses on fertilizers. Information was gathered by literature searches and by personal interviews and visits to research institutes and growers.Rechecking of some fertilization practices for greenhouse tomatoes grown in detached media is proposed. The review indicates that the following should be rechecked: ammonium/nitrate ratio in fertilizer formulations; use of urea in fertilizer solutions; levels of phosphates applied; levels of sulphate applied; simple iron salts vs. chelated iron application; osmotic potential (OP), expressed as electrical conductivity (EC), of the nutrient solution at various growth stages.EC, pH and estimated prices of fertilizer solutions were calculated and presented in tables.