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With the constant promotion of CWS technology, the technology changing Shenfu coal into high concentration CWM has a very important practical significance.

随着水煤浆技术的不断推广,神府煤等难制浆煤种制高浓度水煤浆技术具有很重要现实意义。

TH-904 is used as chelant in papermaking coating, building coating, concrete retarder, water reducer, woven and dyeing. Its performance can reach to that of SN-5040. Adding TH-904 to slurry during grinding process of bolus alba, lime carbonate, pottery clay, titanium pigment, French chalk, barium sulfate, coal-water slurry, etc., the viscosity can be largely reduced and the dispersed slurry is stable.

TH-904水性分散剂广泛用做造纸涂料及建筑涂料的分散剂、混凝土缓凝剂、减水剂以及纺织印染等行业作螯合分散剂,性能达到SN-5040水平,在高岭土、碳酸钙、陶土、钛白粉、滑石粉、硫酸钡、水煤浆及水泥等浆料的研磨加工过程中加入TH-904分散剂能极大地降低被加工物料的粘度,便于物料的加工,且分散后浆料粘度稳定。

The research result shows that the flowability, moldability, cohesiveness of high performance concrete of hill sand are significant by comparison with ordinary concrete on mechanical properties, long term properties, and durability. Motar flowability decreases with the increase of single-mixed active additive. The flowability can be largely improved by double mixing of active additive and super plasticizer NF. This is because not only the active additive has filling effect but also the dispersing effect induced by surface action between additive and super plasticizer NF. And the optimal content of materials are: super plasticizer NF≥0.8%, fly ash 20%, PS 20~30%,zeolite powder≤20%,SF 5~8%; The negative influence of hill sand powder should be avoided by controlling of powder content and the use of active additive and super

研究表明:随着单掺活性掺合料掺量的增加,砂浆流动性减小,活性掺合料与萘系高效减水剂NF双掺使用,比使用同样剂量萘系高效减水剂NF的基准浆体流动性明显增大,这是由于玻璃体材质活性掺合料不仅有填充效应,更主要的是它与高效减水剂之间的表面物化作用产生了分散性,而活性掺合料对浆体的流化作用效果主要是依赖于其分散性;能有效改善胶砂流动性的适宜掺量为:萘系高效减水剂不小于0.8%,粉煤灰掺量为20%,PS掺量为20~30%,沸石矿粉掺量不宜大于20%,SF掺量为5~8%;通过对粉末含量的限制,并借助活性掺合料、高效减水剂的合理使用,就可以避免山砂粉末含量的负面影响,配制出密实度高,抗渗性能优异,具有良好的耐久性能,并具有良好的体积稳定性的山砂高性能混凝土。

This article introduced the process and notes on advance grouting and blocking against water of pump house.

介绍了水泵房预注浆、堵水的过程及注意事项,并评估注浆效果,提出根治水泵房淋水的方案。

Combined with practical work and based upon analysis of advanced water prospecting advanced pre-grouting reinforcement scheme is proposed;at the same time practical construction technology is elaborated from construction of sealing batholite ,reinforcement range of curtain grouting,embedment of pipe,grouting construction process and other aspects.

结合工程概况,通过对超前探水情况的分析,提出采用超前预注浆的加固方案,并从止浆墙或止浆岩盘的施作、帷幕注浆的加固范围、孔口管的埋设、注浆施工过程等方面阐述了其施工技术,最后对注浆效果进行了检查评定,为今后类似工程的施工提供参考依据。

Combined with the projects generate situation,it introduces the action of sealing batholite in curtain grouting,analyses the decided of the construction planning of sealing batholite ,represents the injecting technology and construction techniques of sealing batholite .

结合工程概况,介绍了止浆岩盘在帷幕注浆中的作用,对止浆岩盘施工方案的确定进行了分析,并对注浆工艺及止浆光盘的施工技术进行了详细阐述,实践表明,各涌水段的注浆效果良好,该施工技术值得推广应用。

The cold-flow field in the gasifier chamber is studied.

本文对水煤浆气化炉喷嘴进行了简化处理,在此基础上,对气化室内的冷态流动过程进行了研究,发现:整个气化室都处于流动的回流区长度范围以内;水煤浆气化炉中,由于操作压力很高,气相密度很大,所以即使对于d〓=150μm的较大煤颗粒,其对流体的跟随特性也很好,没有发生流动特性突跃的现象;两相的最大回流速度、回流强度,颗粒相的浓度分布,以及气化室内的静压力损失等,均与气化炉的负荷、水煤浆浓度、煤粒直径、O〓在喷嘴两个流道中的分配比例。

The nozzle of the gasifier is simplified. The cold-flow field in the gasifier chamber is studied. The research shows that the chamber has recirculation along the whole length. The particles in the chamber perform a very good flowing characteristics even for the large particles of dp=150μm, and no abrupt change is observed. This is due to the operational pressure is high and the density of the gas is large there. The maximal reflux velocity of both phases, the reflux intensity, the concentrational distribution of particles, and the static pressure loss in the chamber are all related to following factors: the load of gasifier, the concentration of coal-water slurry, the diameter of the coal particle, the distribution ratio of oxygen in the two channels of the nozzle, and the angle of jet in nozzle.

本文对水煤浆气化炉喷嘴进行了简化处理,在此基础上,对气化室内的冷态流动过程进行了研究,发现:整个气化室都处于流动的回流区长度范围以内;水煤浆气化炉中,由于操作压力很高,气相密度很大,所以即使对于dp=150μm的较大煤颗粒,其对流体的跟随特性也很好,没有发生流动特性突跃的现象;两相的最大回流速度、回流强度,颗粒相的浓度分布,以及气化室内的静压力损失等,均与气化炉的负荷、水煤浆浓度、煤粒直径、O2在喷嘴两个流道中的分配比例、以及喷嘴的射流角等参数有关。

The main facts that affect on the atomizing characteristic and load characteristic of dashing-style atomizer are well known. In order to assure good atomizing quality, increase the capacity and simplify structure, we adjust important parameters and develop a suit of dashing-style CWS atomizers with 6T/h capacity. The atomizing characteristic and load characteristic of CWS atomizer are measured by cool-state experiments.

鉴于此,本文对撞击式水煤浆喷嘴进行了详细的试验研究,明确了影响撞击式水煤浆喷嘴雾化特性和流量特性的主要因素,本着保证雾化效果、加大容量、精简喷嘴结构的原则调整各个参数,开发出一套容量为6T/h的水煤浆雾化喷嘴,并通过冷态雾化试验对此套喷嘴进行了雾化性能和流量特性的测量。

The factors to affect the derating rate are carefully discussed and the technologies to reduce boiler derating are introduced. the retrofitting considerations of four typical oil-fired boilers are researched in detail.

本文针对水煤浆燃烧的特点,在与燃油、燃煤粉燃烧过程的比较研究的基础上,根据水煤浆燃烧机理提出了一个水煤浆雾炬燃烧过程的综合模型,并结合具体的燃烧器和燃烧室进行了数值试验。

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呼气,收缩臀部肌肉;拱起身体,尽量抬起头来,右腿伸直朝向天花板(膝微屈,以避免肌肉紧张)。

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