共查询到19条相似文献,搜索用时 203 毫秒
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固相聚合过程中产品结块对产品品质影响很大,容易导致产品黏度异常,颜色发黄等问题.预结晶器氮气流化效果、结晶器出口的PET结晶程度、产品中IPA、DEG含量控制、生产不同黏度等级产品时非结晶切片的COOH值控制等因素,对固相聚合过程结块有重大影响. 相似文献
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茅骐 《硫磷设计与粉体工程》2004,(5):34-36
在环己酮生产过程中,影响环己酮产品质量的因素很多,其中最为显著的是供入氧化反应器的贫氧控制。介绍了环己酮氧化反应器的贫氧控制系统及其特点,即氮气流量和空气流量均构成了闭合回路,贫氧和空气或氮气又构成了串级控制系统,并根据环己酮生产的工艺要求,详述了贫氧控制系统的控制过程。 相似文献
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本文采用微量法测定石油产品残炭,考察了氮气流量、样品量和样品冷却时间等因素对残炭值的影响及方法的重复性,并对样品组成与残炭值结果的关联进行了研究,从而提高了微量法测定的实用性。实验结果表明:氮气流量、样品量和样品本身的性质是影响微量法测定石油产品残炭值的主要因素,并得到了一些有意义的结论。 相似文献
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对纳米级活性轻质碳酸钙生产中产品工序质量的影响因素进行了分析,并通过调整各工序主要的控制项目,使产品的主要质量指标保持相对稳定。 相似文献
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考察了空分(N2/O2分离)膜进气的压力、流量、温度、湿度以及氮气纯度等因素对膜所产氨气湿度的影响,发现除进气湿度之外,其他因素对之没有直接的影响;当进气湿度一定时,所产氮气的湿度只跟氮气的纯度有关,且成确定的对应关系。 相似文献
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本文介绍用喷雾冷凝法制取粉状硬脂酸单甘油酯的工艺研究.通过探讨熔融物料温度、冷风温度和工作气体─氮气的压力等影响,得出最佳成形条件,以及这些因素对粉状产品粒度的影响规律。 相似文献
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本文叙述了用高碳粉煤灰生产粉煤灰砖的工艺过程,介绍了工艺控制和产品性能,给出了配合比及有关生产控制参数 相似文献
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P. K. Bhattacharya A. S. Shrinath D. Kunzru 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1985,35(5):223-233
Concentrated black liquor was pyrolysed in a semi-batch reactor in an inert atmosphere of nitrogen at 873–993 K. The effects of temperature and reaction time on the gas yields and compositions were studied. The main components of the gaseous product were hydrogen, methane, carbon monoxide, carbon dioxide and sulphur-containing gases. The percentage recovery of energy was also determined. On the basis of the experimental runs, a reaction model was proposed for the kinetics of the pyrolysis reaction, and the activation energies and frequency factors of the rate constants were determined. 相似文献
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The possibility of radio-frequency (RF) nitrogen and water steam plasmas under reduced pressures for gasification of plastic waste as a thermal recycling method has been investigated in order to develop an innovative method for directly recycling plastic waste to hydrogen, synthesis gases or fuels. The products of pyrolysis were analyzed and classified into gaseous fraction and solid soot; and analytical interest was focused on the gaseous product composition. It was found that the electrode geometry, input power, reactor pressure and plasma working gas were the key parameters affecting the plasma characteristics and pyrolysis product. Experiments with different plasma media indicated that when polyethylene (PE) powder was injected into nitrogen plasma, the PE was decomposed and hydrogen formed as a main product by reaction with the plasma; when water steam plasma was used for conversion of PE, the carbon conversion to gas was dramatically enhanced in the presence of water steam, and the main gas products were carbon monoxide and hydrogen. Preliminary solid products analysis and pyrolysis mechanisms for the different plasmas processes were also discussed. 相似文献
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V. M. Shmelev 《Theoretical Foundations of Chemical Engineering》2006,40(5):526-534
A method for producing nitric oxide(II) by binding atmospheric nitrogen in a multistage-compression chemical reactor is considered. The operation of the reactor proposed is based on the nonisentropic pulsed compression of the working gas with increasing entropy. The oxidation of atmospheric nitrogen in a cyclic reactor operating on an internal combustion engine cycle is theoretically analyzed, and it is shown that, in such a reactor with two compression strokes, the product concentration at the reactor outlet may reach 5% at a specific energy efficiency of the process of approximately 80 g NO per kilowatt-hour of energy consumed. 相似文献
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采用高氨氮人工配水和序批式反应器,在限氧(0.2~0.3mg/L)条件下,研究了进水氨氮负荷、游离氨和游离亚硝酸对氨氮转化率、亚硝化率和亚硝氮生成速率的影响及游离氨对氨氧化菌的基质抑制动力学。结果表明,在进水氨氮负荷逐步提升过程中,由于高浓度游离氨的抑制作用及负荷冲击的影响,亚硝化效果易出现波动,且负荷越高,亚硝化性能恢复的时间越长。反应系统最终可达到的氨氮容积负荷为3.60kg/(m3·d),亚硝氮生成速率为2.98kg/(m3·d),亚硝化率始终维持在85%左右。反应体系中较高的游离氨浓度(24.4~85.8mg/L)和低浓度溶解氧是维持亚硝化工艺稳定运行的主要因素。游离氨对氨氧化菌的抑制动力学符合Haldane模型,拟合得到最大氨氧化速率为6.71gN/(gVSS·d),游离氨半饱和常数和抑制常数分别为3.2mg/L和27.8mg/L。 相似文献
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