天力股份

<正>山东天力荣誉中国通用机械协会干燥分会理事长单位内置式换热器流态化干燥装置获山东省科技进步一等奖内置式换热器流态化干燥装置获中国石油和化学工业协会科技进步一等奖流化床干燥机列入国家火炬计划内加热流化床荣获山东省技能奖承担国家九五干燥重大装备国产化项目过热蒸汽内加热流化床褐煤干燥提质成套工艺技术过热蒸汽内加热流化床褐煤预干燥提质工艺技术在安全生产节能降耗和节约水资源方面具有巨大优势,行业应用广泛。     

山东天力干燥股份有限公司

<正>科院天力山东天力荣誉中国通用机械协会干燥分会理事长单位中国化工学会干燥技术专业组挂靠单位全国干燥专业标准化技术委员会组织单位中国化工装备总公司干燥技术中心山东天力设计资质化工、石化、医药、建材、冶金类乙级设计资质D1、D2类压力容器设计、制造资质经营范围流化床干燥机系列:普通流化床、内加热流化床、喷雾造粒流化床、振动流化床等转筒干燥机系列:自清理型转简干燥机、间接换热型转简干燥机、蒸汽回转干燥机等其他干燥机系列:旋转闪蒸干燥机、喷雾干燥机、浆叶干燥机     

山东天力干燥股份有限公司

<正>科院天力●山东天力荣誉中国通用机械协会干燥分会理事长单位中国化工学会干燥技术专业组挂靠单位全国干燥专业标准化技术委员会组织单位中国化工装备总公司干燥技术中心●山东天力设计资质化工、石化、医药、建材、冶金类乙级设计资质D1、D2类压力容器设计、制造资质●经营范围流化床干燥机系列:普通流化床、内加热流化床、喷雾造粒流化床、振动流化床等转筒干燥机系列:自清理型转筒干燥机、间接换热型转筒干燥机、蒸汽回转干燥机等     

内加热流化床在草甘膦干燥中的应用

针对草甘膦物料的干燥特点，分析对比了不同的干燥方法。设计了一套内加热流化床干燥系统，并进行了测试分析与对比。结果表明设计中采用的措施合理有效，设计参数可靠。新系统能显著提高热效率、降低动力消耗，明显改善产品质量。     

氯化钠内加热流化床冷却换热管开裂原因及预防措施

介绍了氯化钠内加热流化床干燥机的工作原理和工作环境,针对实例分析了氯化钠干燥机冷却换热管开裂的原因,提出了切实可行的预防措施。     

粒状物料在辐射-对流组合加热倾斜振动流化床中的干燥

固体颗粒在倾斜振动流化床(IVFB)中极易以较低气速流化。在振动作用下,流化颗粒沿气流方向混合良好,床层表面不断更新。因此,当以干燥机顶部表面辐射加热时,该床层表面对辐射热的吸收比无振动的流化床层更有效。这种特性表明IVFB适用于太阳能干燥机和其它类似的干燥机。本文描述了所进行的模型实验结果。其目的是确认辐射加热对颗粒状湿物料干燥的适用性。     

杭州钱江干燥设备有限公司：GPQ微型多功能干燥实验机

公司简介 杭州钱江干燥设备有限公司是中国通用机械干燥设备行业协会副理事长单位和首批重点骨干企业、浙江省优秀科技型企业。是一家从事热力干燥技术开发、设备制造、销售、安装和技术咨询服务于一体的高新技术企业。公司成立二十多年来,已为化工、石化、精细化工、轻工、制药、食品、农副产品、矿产品、陶瓷、冶金、建材、木材、造纸、磁性材料等行业提供了近千套干燥设备。公司还相继开发了内加热流化床干燥机、耙散卧式流化床干燥机。粗颗粒喷雾造粒流化床千燥机、过热蒸汽干燥机等新产品,也受到了用户的好评。     

日本新型干燥机专利二则

<正> 一、转鼓式流化床干燥机 在进行粉体干燥时,以往常使用转鼓型干燥机,近年来也常使用流化床干燥机。但是,这两种机型对于粉体干燥来说,各有所短,均不能十分满意地完成干燥操作。转鼓型干燥机的缺点在于,热风与被干燥物料的接触不充分,热效率很低,因此干燥过程     

多层振动流化床干燥机工作原理及特点

多层振动流化床干燥机是化工产品干燥的一种新型设备，是单层流化床干燥机的一种改进形式。这种干燥机在干燥箱结构，孔板结构及调整等方面，比以往干燥设备具有极大改进。本文从振动和风力两个角度出发，着重介绍了这种干燥机的工作原理，物料的运动情况和干燥过程，明确分析了它的特点和应用。     

多层振动流化床干燥机工作原理及特点

多层振动流化床干燥机是化工产品干燥的一种新型设备，是单层流化床干燥机的一种改进形式。这种干燥机在干燥箱结构，孔板结构及调整等方面，比以往干燥设备具有极大改进。本文从振动和风力两个角度出发，着重介绍了这种干燥机的工作原理，物料的运动情况和干燥过程，明确分析了它的特点和应用。     

离心流化床干燥器的流体力学及传热性能

以９种颗粒物料为研究对象,找出了影响离心流态化干燥系统的流体力学及传热性能的主要因素,回归得到了流体力学及传热的无因次准数关联式,为进一步研究此设备的干燥性能打下了基础。     

新型内热式流化床干燥器的设计

分析了目前内热式流化床干燥器各种内部换热器的结构特点与其存在的弊端,并在此基础上设计出了新型指管式换热器。并依据基本的质量与热量平衡关系,推导出了内部换热器换热面积的计算方法;并对流化床干燥器其他基本参数的选择作了描述。     

DRYING OF GRANULAR MATERIALS IN AN INCLINED VIBRATED FLUIDIZED BED BY COMBINED RADIATIVE AND ONVECTIVE HEATING

In an inclined-vibrated fluidized bed (IVF-bed), solid particles are fluidized easily at a relatively low air velocity. Good mixing of the fluidized particles in the direction of the air flow and the renewal of the bed surface take place as a result of the vibration effect. Accordingly when the bed surface is heated by thermal radiation from the top surface, radiant heat is absorbed more effectively on the surface than on a stagnant bed surface. This characteristic of an IVF-bed indicates the applicability to a solar dryer and other similar dryers.

The present study reports the result of model experiments carried out to confirm the effectiveness of radiative heating on drying of wet granular materials. Further, for quantitative evaluation of the radiation effect, a theoretical model is offered and its validity is examined.     

DRYING OF GRANULAR MATERIALS IN AN INCLINED VIBRATED FLUIDIZED BED BY COMBINED RADIATIVE AND ONVECTIVE HEATING

In an inclined-vibrated fluidized bed (IVF-bed), solid particles are fluidized easily at a relatively low air velocity. Good mixing of the fluidized particles in the direction of the air flow and the renewal of the bed surface take place as a result of the vibration effect. Accordingly when the bed surface is heated by thermal radiation from the top surface, radiant heat is absorbed more effectively on the surface than on a stagnant bed surface. This characteristic of an IVF-bed indicates the applicability to a solar dryer and other similar dryers.

The present study reports the result of model experiments carried out to confirm the effectiveness of radiative heating on drying of wet granular materials. Further, for quantitative evaluation of the radiation effect, a theoretical model is offered and its validity is examined.     

垂直内挡板对流态化流体动力学及谷物干燥特性之影响

The effect of vertical internal baffles on the particle mixing and grain drying characteristics in a batch fluidized bed column is investigated. Experimental work was carried out in a 3 m high rectangular fluidized bed dryer of cross sectional area of 0.15 mx0.61 m at different operating conditions using paddy, a group D particle, as the fluidizing material. The results of the study showed that the fluidized bed dryer system with vertical internal baffles gave better particle mixing effect in the bed of particles than that without vertical internal baffles. This is due to the fact that the vertical internal baffle act as gas bubble breakers by breaking up the large gas bubbles into smaller ones. The smaller bubbles cause a more vigorous mixing in the bed of particles before finally erupting at the bed surface. This improves the contacting efficiency and enhanced the heat and mass transfer of the fluidized bed system. Thus a higher drying rate was obtained in the falling rate period because the higher contactin efficiency increases the evaporation rate at the particle surface. However, the drying rate in the diffusion regiol shows little improvement because the moisture diffusivity does not depend on the contacting efficiency. The fluidized bed dryer with vertical internal baffles could therefore be used in the initial rapid drying stage in a two stage drying strategy for paddy. The insertion of vertical internal baffles into a fluidized bed system improves the processing of Group D particles in a fluidized bed system especially if the system is large in scale.     

内热式惰性粒子流化床中膏状物料干燥模型

通过对惰性粒子流化床中膏状物料干燥机理的分析,得到了干燥时间及单位面积床层水分汽化量的数学计算式,可对干燥器的性能进行预测。采用带浸没加热管的惰性粒子流化床对膏状钛白物料进行干燥中试研究,采用气流式喷嘴将膏状物料分散成200～400μm的小液滴喷洒在惰性粒子表面进行干燥,探索了适宜的干燥条件,测定和确定了最佳的干燥工艺参数、操作参数和设备参数。结果表明:该干燥工艺能强化床内传热传质,促进高黏性膏糊状物料很好地分散,床层温度分布均匀,干燥器的操作弹性大,热量消耗低,干燥强度高,传热系数可达300W·m-2·K-1以上。     

Experimental and numerical analysis of oil shale drying in fluidized bed

The main objective of this work was to experimentally and numerically investigate the Liu Shu River oil shale drying by the means of flue gas in a fluidized bed dryer. Several experiments were performed under different temperatures conditions. The moisture content of oil shale was measured during the experiments. The two-stage drying model was incorporated in computational fluid dynamics (CFD) package FLUENT via user-defined functions (UDF) and utilized for simulation of heat and mass transfer of oil shale drying in the fluidized bed dryer. The simulation results for solid moisture content agreed well with experimental data. The effects of the temperature and velocity of flue gas, initial bed height, and the particle size on the drying characteristics were predicted and analyzed. It is shown that the gas temperature and velocity are the important parameters in the whole drying process. The particle size has more obvious influence in the falling drying period than the constant drying period. The temperatures of gas and solid phases were monitored. It is shown that the so-called “near gas distributor zone” is the most effective heat transfer zone, which agrees well with the calculated value. The system quickly reached thermal equilibrium, characterizing a nearly isothermal bed. The developed model provides a very good demonstration to describe the oil shale drying in the fluidized bed dryer, and may provide important information for design, optimization of operation conditions.     

串行流化床煤气化试验

针对串行流化床煤气化技术特点,以水蒸气为气化剂,在串行流化床试验装置上进行煤气化特性的试验研究,考察了气化反应器温度、蒸汽煤比对煤气组成、热值、冷煤气效率和碳转化率的影响。结果表明,燃烧反应器内燃烧烟气不会串混至气化反应器,该煤气化技术能够稳定连续地从气化反应器获得不含N₂的高品质合成气。随着气化反应器温度的升高、蒸汽煤比的增加,煤气热值和冷煤气效率均会提高,但对碳转化率影响有所不同。在试验阶段获得的最高煤气热值为6.9 MJ&#8226;m^-3,冷煤气效率为68％,碳转化率为92％。     

柱形流化床传热特性的数值模拟

对Shedid等搭建的圆柱体流化床采用欧拉?欧拉法进行三维数值模拟,考察了颗粒球形度、表观进气速度和床料初始堆积高度对流化床内垂直加热壁面与流动床料之间对流传热特性的影响,采用有效导热系数分别计算气相和固相的对流传热系数。结果表明,随表观进气速度增大,流化床内颗粒物料湍流运动加剧,加热壁面平均温度和流体平均温度下降,壁面流体间传热平均温度差减小,壁面流体间对流传热系数增大;随初始床料高度增加,流化床内颗粒与加热壁面的接触面积增大,导致固相平均对流传热系数增大。     

用颗粒热传递模型计算旋转列管干燥机的传热系数

采用基于移动加热板的颗粒热传递模型计算大型旋转列管干燥机的传热系数。在料床完全混合的简化假设下 ,按物料在干燥机内的实际干燥过程分段计算各段的传热系数及整机总传热系数 ,其结果与干燥机的实际运行情况基本相符。