活性炭厂红外感应烘料干燥机应用分析

为了解决传统活性炭厂烘料机自动化水平及烘料效率低等技术难题,降低成品活性炭内部水分,提高活性炭烘干效率及速度,大同煤业金鼎活性炭有限公司通过技术研究,采用了一套红外感应烘料干燥机,通过实际应用,该设备可快速将活性炭水分由80%降低至3%,取得了显著成效。

高料层蒸烘机常见故障分析与排除

高料层蒸烘机是我国浸出法制油行业中应用最广泛的一种湿粕连续脱溶设备。它不仅适用于菜籽、棉籽、大豆、花生等的预榨浸出后的湿粕脱落，而且也适用于大豆、米糖、棉柏等的一次浸出后的湿粕脱落。它具有结构简单、脱溶效果好、溶耗低、操作方便、便于维修等优点。但目前从许多厂的使用情况看，还存在不少问题。如干粕残溶高、溶剂回收效果差、蒸粉机喷料、提不高料温、烧毁电机等。为此，将上述问题产生的原因及排除方法介绍如下。

汽车内饰用低挥发改性聚丙烯材料的研究

采用双真空脱挥和烘料工艺处理汽车内饰用改性聚丙烯材料,通过袋式法结合气相色谱-质谱联用(GCMS)检测了改性车用聚丙烯材料总挥发性有机物(TVOC)前5种物质及其处理前后改性聚丙烯材料的TVOC释放量。结果表明,该材料TVOC前5种物质是烷烯烃类物质,很可能来源于聚丙烯树脂。当采用双真空脱挥(真空度为-0. 06 MPa),同时进行烘料工艺(烘料温度130℃、烘料时间4 h),改性车用聚丙烯材料TVOC含量下降了约为80%,并在零部件上进行验证,满足标准限定值。

汽车用工程塑料气味性影响因素的研究

本文研究了加工助剂、加工温度、主机转速、真空度、烘料温度、烘料时间对汽车用聚丙烯工程塑料气味性的影响。结果表明添加气味吸附剂和气味脱除剂可以有效降低气味性;加工温度过高、主机转速过快会导致气味性增大;随着真空度的增加,气味性逐渐降低;提高烘料温度、延长烘料时间有助于减低材料气味性。

A Preliminary Study on Intensive Curing with Alcohol-based Fuels

The research investigated application effects of alcohol-based fuels in in- tensive curing. The results showed that alcohol-based fuels allow flexible adjustment of temperature and heat supplying. What＇s more, in treatment A, the cured tobac- cos are softer and brighter, with more oil content and higher proportion of first-class tobaccos. Per leaf weight increased by 0.13 g and output value per kang （a heat- able brick bed） deducting energy cost grew by 188.66 yuan. In addition, the con- tents of reducing sugar and potassium enhanced within the ranges of high-quality tobacco, and chemical components are more coordinated.

温度参数对注塑成型的影响

塑料注塑件已经被广泛应用到汽车、家电、电子等国民经济的各个领域。热塑性聚合物的注塑成型可分为熔胶、充填、保压和冷却等阶段。合适的温度参数能保证在注塑过程中材料能充分干燥、熔体能良好塑化,从而顺利充模、冷却与定型,最终产生出合格的塑料产品。本文结合大量实例,分析了烘料温度、注塑机各段的温度、热流道的温度和模温等温度参数对注塑成型产品外观缺陷和性能的影响,为相关从业人员提供了新的思路。

Discussion on Biomass Fuel Operation Model Dominated by Tobacco Straw

With the gradually popularization of replacing coal tobacco leaf flue-curing technology with biomass fuel, the operation of raw materials collection and transportation links faces many problems. In this paper, the existing problems in view of biomass fuel operation dominated by tobacco straw in current tobacco leaf flue-curing were analyzed, and the 3 kinds of fuel operation modes （＂contracting processing mode, displacement mode and commercialization mode＂） were put forward, each of which was also briefly analyzed, with the aim to expand the way of thinking about biomass raw materials processing by cooperative organization.

Effect of baking processes on properties of TiB_2/C composite cathode material

Pitch and TiB2/C green composite cathode material were respectively analyzed with simultaneous DSC-TGA, and effects of three baking processes of TiB2/C composite cathode material, i.e. K25, K5 and M5, on properties of TiB2/C composite cathode material were investigated. The results show that thermogravimetrie behavior of pitch and TiB2/C green composite cathode is similar, and appears the largest mass loss rate in the temperature range from 200 to 600 ℃. The bulk density variation of sample K5 before and after baking is the largest （11.9%）, that of sample K25 is the second, and that of sample M5 is the smallest （6.7%）. The crushing strength of sample M5 is the biggest （51.2 MPa）, that of sample K2.5 is the next, and that of sample K5 is the smallest （32.8 MPa）. But, the orders of the electrical resistivity and electrolysis expansion of samples are just opposite with the order of crushing strength. The heating rate has a great impact on the microstructure of sample. The faster the heating rate is, the bigger the pore size and porosity of sample are. Compared with the heating rate between 200 and 600℃ of samples K25 and K5, that of sample M5 is slower and suitable for baking process of TiB2/C composite cathode material.

Using Wheat Futures to Stabilize the Cost of Raw Material in Bakery Sector

The article presents the example of using relations between the price of wheat flour sold by the milling companies and the price of wheat futures listed on the FOREX market to protect the companies from bakery sector against adverse price movements of raw material--wheat flour. The paper aims to present a method which can help to reduce risk of changes wheat flour price in the market by using wheat futures traded at FOREX market. For the analysis authors used weekly data since January 2006 until October 2010 about wheat flour price, wheat grain price, wheat futures prices, quotes a currency pair USD/PLN. Wheat flour prices came from studies of the Department of Agricultural Markets, Ministry of Agriculture, and Rural Development in Poland and represented the average sales price of wheat flour by milling companies. Information about wheat futures and quotes a currency pair USD/PLN reflects the actual trading of the FOREX market. Authors used statistical analysis tool for determining the strength of the relationship between the price of wheat flour and the wheat price on the domestic market and the wheat futures price. The correlation coefficient between them was 0.763. For further test authors used seven different options that use future contracts to reduce fluctuations in the flour price which can be used in bakery businesses. These results of research show that someone can effectively use wheat futures contracts listed on the FOREX market to protect the bakery business against adverse movements of wheat flour prices. Application in practice chosen strategies can allow bakery companies to achieve cost advantages by reducing the adverse changes in the wheat flour prices. Chosen strategies are more efficient if the prices of flour in the domestic market are rising. If prices drop down, the effectiveness of using wheat futures contracts was lower. It should be noted that wheat futures contracts are a good tool to achieve cost advantages in the bakery industry, especially when the wheat flour prices are increased on the domestic market.

Torrefied Pellets as Fuel for Two-Stage Technology of Biomass Conversion into Synthesis Gas

One of the most important properties of the torrefied pellets, along with high calorific value, is their hydrophobicity. Inability to absorb moisture and self-destruct under its influence determine possibility of using of pellets in the pyrolysis reactor. For the technology of two-stage thermal processing of biomass, developed at the Joint Institute for High Temperatures, the amount of synthesis gas which can be obtained from one kilogram of torrefied pellets is also important. A construction of the pilot torrefaction reactor powered by flue gas is shown. The results of experimental investigations of hydrophobicity of torrefied pellets produced by the reactor and quantity of synthesis gas which can be obtained by two-stage thermal processing of the pellets are presented. It is shown that torrefaction allows simplifying the process of conversion of pellets into synthesis gas without significant reduction in the volume of the gas.

提高沥青路面热再生RAP料掺配率的技术措施

为了提高沥青路面热再生RAP料的掺配率,促进废旧沥青混合料的再利用,分析了RAP料掺配率较低的原因,提出了双层滚筒烘料、混合料外掺式改性和变细调整级配3种技术措施,选取了AC-10、AC-13和AC-16等3种级配类型及对应的RAP料掺配率100%、75%和55%,试验研究了再生混合料经过外掺式改性前后的高温稳定性、水稳定性和低温抗裂性。结果表明：RAP料的掺配率随着变细调整级配而得到大幅度提高;再生混合料经添加热再生改性剂后,其高温稳定性、水稳定性和低温性能均得到显著提高且满足技术规范的相关要求;后续研究及工程应用表明,采用双层滚筒烘料设备,对提高RAP料掺配率极为有效。