1) coal quality of seven coal samples
7种煤煤质
3) coal type
煤种
1.
Effects of coal type and carbonization conditions on the surface properties of activated coke;
煤种及炭化条件对活性焦表面化学性质的影响
2.
The effects of coal type and carbonization conditions on the porous texture of activated char derived;
煤种及炭化条件对活性焦孔隙结构的影响
3.
The effects of the coal type and the hot-briquetting process parameters on the strength of the Carbon Composite iron ore hot Briquette(CCB) are investigated,and the mechanism of the CCB strength is discussed.
重点考察了煤种及热压工艺参数对热压含碳球团冷态强度的影响,并探讨了热压含碳球团获得高强度的机理。
4) kind of coal
煤种
1.
Base on element and lithofacies analysis of coals,it was discussed that the relationship the kind of coal with productivity of hydrogenation reaction.
在煤的组成和物理性质等与液化特征之间建立良好的对应关系,总结出适合煤液化用煤种的一些特性。
2.
In the process of coal based DR, the results of the product is greatly affected by the kind of coal, especially its reactivity, content of ash and content of volatile.
煤基直接还原过程中,煤种对产品指标影响很大,特别是煤的反应性、灰分和挥发分含量对直接还原的影响较大。
5) coal variety
煤种
1.
Adaptability questions for coal variety of SG1 025 t/h boiler have been studied and tested in this paper, the paper analyzed the security and economy while burning different coal variety of this boiler,conclusion and suggestion that instrust the boiler running have been proposed.
简要介绍了襄樊电厂SG1025t/h锅炉对煤种适应性的试验情况,分析了该锅炉在燃烧贫煤、混煤、烟煤时的安全性和经济性,提出了指导锅炉运行的结论与建议。
2.
The fineness of coal powder from the pulverizing system and the coal variety effective on the fume discharge temperature of boiler have been analysed in the paper.
分析了制粉系统煤粉细度和煤种及运行方式对锅炉排烟温度的影响 ,并且提出了一些措施 ,供参考。
6) coal rank
煤种
1.
This paper approaches the adaptability problem of coal rank for large size utility boiler from the fuel coal characteristies,e-quipment configuration and operating conditions the three aspects and seeks after the optimum coupling of boiler type and coal property through coal-batching and blended-coal firing as well as adjusting and testing.
从燃煤特性、设备结构和运行条件三方面,探讨了大型锅炉煤种适应性问题,并通过配煤掺烧调整试验,寻求炉型与煤种的最佳耦合。
2.
This paper systematically expound the characteristics and functions of the contentwide data source stored in the data bank of chinese coal rank source, these data include the coal resource of the national productive mining areas and prospecting areas, production, coal quality, transformation and combustion.
系统地阐述了中国“煤种资源数据库”存储的全国生产矿区和勘探区的煤炭资源、生产、煤质和转化、燃烧等内容广泛、丰富的数据源的特征和作用。
补充资料:煤质
煤质
property and quality of coal
煤质(Pr0Perty and quality ofcoal)既指煤炭质量,又包含煤的性质。 ·煤质指标能表征煤炭质量最基本也是最主要的指标有水分、灰分、挥发分、固定碳、硫分和发热量等几个指标。对商品煤来说,含歼率和块煤限卞率也是重要的质量指标。 煤炭水分主要分全水分(也叫收到基水分,符号为Mt或五么r)、外在水分(Mf)和内在水分(厄ink沁全水分是评价煤炭质量的重要指标,其数值的大小直接影响煤炭收到基(曾叫应用基或工作基)低位发热量(Q耽,,。:)的大小,同时全水分的大小还直接影响到煤的加工、运输和使用价值。外在水分的大小主要与井下地质条件和开采工艺等因素有关。内在水分与煤的煤化程度密切相关,通常以褐煤的内在水分最高,可达30%左右;焦煤的内在水分最低,可达0.3%以一下。 灰分是煤中矿物质燃烧后的残留物,一般不超过40%。灰分越高,表征煤的质量越差,当干基灰分(A户产率超过49%以后就不属于正常的煤炭产品了。灰分也是煤炭计价的重要指标。从煤炭利用角度看,灰分越低,经济效益越高,无论是用煤量或排灰量均可减少,也可减少对周围环境的污染。中国灰分最低的煤有宁夏汝箕沟的无烟煤,其灰分可达5%以下。发达国家为了降低煤的灰分,无论是炼焦煤或动力煤几乎都要经过洗选。近几年来,中国商品煤的灰分有明显下降,全国平均商品煤灰分已由21%左右降到19%左右。 煤炭挥发分不仅是代表煤化度的指标,也是评价煤的燃烧、气化、炼焦、液化加氢和其他化学加工的重要参数。如机车和工业锅炉的燃煤要求挥发分(vda,)大于20%,合成氨用半水煤气的原料煤的挥发分要求低于10%,液化用煤要求挥发分30%以上的低煤化度煤等。挥发分还是估算煤炭发热量的重要参数,也是煤炭计价时的重要指标。浮煤挥发分值又是煤分类的主要指标。 固定碳与硫分固定碳也是评价煤质的重要指标。合成氨用半水煤气炉用煤要求固定碳(F岛)在65%以上。 煤炭硫分是煤中有害成分,硫分越高,表示煤的质量越差。煤中硫分含量的变化很大,从0.1%左右到10%以上的均有。各种工业利用对煤的硫分含量均有不同的要求。环保部门对燃煤排入大气中的502浓度也有严格的限制,超标排放的单位要罚款,严重的甚至要迁出城市。中国对炼焦用煤的硫分有严格的限制,一般干燥基硫分〔Stid)不得超过1.5%,且越低越好,个别稀缺煤种如肥煤的最高硫分也不得超过2.5%。煤的硫铁矿硫和硫酸盐硫等无机硫经过重力洗选大部可以脱除,有机硫经过洗选后很难除去,有的反而比选前的原煤更高。
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参考词条