共查询到18条相似文献,搜索用时 78 毫秒
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介绍了新型组合干燥工艺在间苯二甲酸生产中的应用,重点阐述了桨叶干燥机-蒸汽管回转干燥机的工艺流程及干燥设备,分析了组合干燥工艺的特点。新系统投用后的一年内,没有物料堵塞和黏壁现象发生,未因干燥机碱洗造成COD超标,装置负荷率由80%提高到100%。 相似文献
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蒸汽管回转干燥机在褐煤干燥上的应用 总被引:1,自引:0,他引:1
周立荣 《煤炭加工与综合利用》2010,(6):34-37
针对褐煤高水分、高挥发分、热稳定性差以及易自燃等特点,经过对比分析,选择适合褐煤干燥的技术方案,同时在传统蒸汽管回转干燥机的基础上,根据试验研究结果,摸索出适合褐煤干燥的蒸汽管回转干燥机结构和工艺参数,并成功地运用于高水分印尼褐煤的干燥。 相似文献
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蒸汽管回转干燥机在铅精矿干燥中的应用 总被引:1,自引:0,他引:1
介绍了铅精矿蒸汽管回转干燥机系统的工艺流程,针对铅精矿的特性,对干燥系统的进料方式、密封形式、除尘器、冷凝水排放系统进行了设计改进。该干燥系统运行稳定、易于操作,各项运行指标达到设计值,并且生产负荷可在30%~110%范围内调节。 相似文献
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常规的盘式干燥机在干燥漂粉精中存在能耗大、粉尘多以及DCS的控制连续性等问题。阐述了旋转气流喷动干燥机的工作原理、特点及其部件设计方案,设计并制造了二叶后掠式旋转搅拌器、密封装置及其他辅助设备。通过试验证明了旋转气流喷动干燥机在漂粉精工业生产中替代盘式干燥机的可行性:可节省占地面积50%,节省设备投资10%,生产1t漂粉精的蒸汽消耗可节省1.28t,产品收率>98%。 相似文献
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主要介绍蒸汽管回转干燥机的结构及 1 200 t/d 硫精砂干燥机的设计.与传统采用热风作为干燥介质的回转窑式干燥机相比,蒸汽管回转干燥机采用硫酸废热发电系统抽出的低压蒸汽作为干燥介质,热源稳定,节省用煤,并且不产生新的硫污染.试验表明,当物料ω(H2O)低于 15% 时,处理量和干燥强度基本在设计范围内,载气温度 110~123℃,相当安全. 相似文献
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Math H. G. Jennekens 《Nutrient Cycling in Agroecosystems》1987,12(2):175-184
Fertilizer salts are sensitive to the humidity of the surrounding air; above certain relative humidities, they will absorb water. The humidity above which they absorb water is defined as critical relative humidity (CRH). The CRH decreases with increasing temperature.Fertilizer drying usually takes place at relatively high temperatures to facilitate heat exchange. The optimum drying effect is obtained only when the CRH of the product is sufficiently greater than the actual relative humidity (RH) of the air. A method that takes into account both the heat exchange and the CRH of the material has been developed for designing rotary dryers for fertilizers. A computer program is available that supports this design procedure. 相似文献
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Tatiana Lopes Fialho Evandro Martins Arlan Caldas Pereira Silveira Carolina Rodrigues de Jesus Silva Pierre Schuck 《Drying Technology》2018,36(8):922-931
Industrial production of lactose hydrolyzed milk powder (LHMP) remains challenging. Due to the presence of the monosaccharides glucose and galactose, lactose-free powders tend to suffer stickiness, caking, and browning during drying and storage. We sought to find ideal conditions spray dryer inlet air temperature (θair,in) and concentrated milk flow rate (mCM) for LHMP production. We tested θair,in settings of 115–160°C and mCM of 0.3–1.5?kg?·?h?1, and also applied mass and energetic balances. LHMP generally exhibited higher mass and energetic losses than the control (milk powder containing lactose), as a consequence of the relatively low dryability of LHMP. For a lab scale spray dryer, the ideal conditions settings for LHMP production were θair,in?=?145?±?2°C and mCM?=?1.0?kg?·?h?1, taking into account the mass yield and energetic cost (kJ?·?kg?1 of powder) of the process. These ideal conditions are a potential tool for the industrial development of lactose-free dairy powders. 相似文献
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Ruifang WANG Zhanyong LI Yanhua LI Jingsheng YE 《Frontiers of Chemical Engineering in China》2009,3(3):289-292
A new hybrid drying technique by combining microwave and forced convection drying within a rotary drum, i.e., microwave rotary
drying, was developed with the purpose to improve the uniformity of microwave drying. In a laboratory microwave rotary dryer,
rewetted soybean was utilized as experimental material to study the effects of drum rotating speed, ventilation flow rate,
and specific microwave power on the drying kinetics and cracking ratio of soybean. It was found that, with rotation, the cracking
ratio can be lowered but without distinct improvement in the drying rate. Increasing ventilation flow rate and specific microwave
power can improve the drying rate, but the cracking ratio also increases as a negative result. The cracking ratio lower than
10% can be attained for ventilation flow rate lower than 2.0 m3·h−1 or specific microwave energy lower than 0.4 kW·kg−1 in the present experiments. 相似文献