本公司在吸收国内外先进技术的基础上，进行改进、优化设计的模型空心桨叶干燥机，可对膏状、颗粒状、粉状、浆状物料间接加热或冷却，可完成干燥、冷却、加热、灭菌、反应、低温煅烧等单元操作。设备中特殊的楔型搅拌传热桨叶，具有较高的传热效率和传热面自清洁功能。

概述

空心轴上密集排列着楔型中空桨叶，热介质经空心轴流经桨叶。单位有效容积内传热面积很大，热介质温度从-40°c到320°c，可以是水蒸气，也可以是液体型：如热水、导热油等。间接传导加热，没有携带空气带走热量，叶传热面具有自清洁功能。物料颗粒与楔型面的相对运动馋生洗刷作用，能够洗刷掉楔型面上附着物料，使运转中一直保持着清洁的传热面。桨叶干燥机的壳体为w型，壳体内一般安排二到四根空心搅拌轴。壳体有密封端盖与料位高度，使传热面被物料覆盖而充分发挥作用。热介质通过旋转接头，流经壳体夹套及空心搅拌轴，空心搅拌轴依据热介质的类型而具有不同的内部结构，以保证最佳的传热效果。

应用

桨叶干燥机已成功的用于食品、化工、石化、染料、工业污泥等领域。设备传热、冷却、搅拌的特性使之可以完成以下单元操作：煅烧（低温）、冷却、干燥（溶剂回收）、加热（融化）、反应和灭菌。搅拌桨叶同时又是传热面，使单位有效容积内传热面积增大，缩短了处理时间。楔型桨叶传热面又具有自清洁功能。压缩—膨胀搅拌功能使物料混合均匀。物料沿轴向成“活塞流”运动，在轴向区间内，物料的温度、湿度、混合度梯度很小。

导热油做热介质，桨叶干燥机可完成低温煅烧工作。如：二水硫酸钙（Ca2SO4.2H2O煅烧转化为半水硫酸钙（Ca2SO4.1/2H2O）。碳酸氢钠（Nahco3）经煅烧转化为纯碱（Na2CO3）等。

通入冷却介质，如水、冷却盐水等即可用来冷却。如：使用于纯碱行业的桨叶式凉碱机，取代老式的空气冷却凉碱机，节省了能源及尾气处理设备，降低了操作费用，还可用于钛白粉、镍铁合金粉及各种粉粒状物料的冷却。在单台机理可以将物料从1000°c冷却到小于40°C。

干燥，设备最主要的功能，不使用热空气，使溶剂回收、能源消耗、环境控制处于易处理的理想状态。对需回收溶剂。易燃易氧化热敏性物料尤为适应。已广泛用于精细化工、石化、染料行业。

轴向区间内，温度、湿度、混合度的均匀性，使得设备可用来加热或融化，或进行一些固体物料反应。再复合肥及变性淀粉行业均已成功使用。桨叶干燥机可用来对食物和面粉进行灭菌处理。单位有效容积内大的加热面积，很快就将物料加热到灭菌温度，避免了长时间加热而改变物料品质。

适应物料

石化行业：聚烯烃粉体、聚碳酸酯树脂、高、低密度聚乙烯、线型低密度聚乙烯、聚缩醛颗粒、尼龙6，尼龙66、尼龙12、醋酸纤维、聚苯硫醚。丙烯基树脂、工程塑料、聚氯乙烯、聚乙烯醇、聚苯乙烯、聚丙烯、聚酯、聚甲醛、苯乙烯~丙烯晴共聚、乙烯-冰系共聚。

环保行业：PTA污泥、电镀下水污泥、锅炉烟灰、制药厂废渣、糖厂废渣、味精厂废渣、煤灰。

饲料行业：将油炸、骨基饲料、酒糟、食品下角料、苹果渣、橘子皮、豆粕、鸡骨饲料、鱼粉、饲料添加剂、生物渣泥。

食品行业：淀粉、可可豆、玉米粒、食盐、变性淀粉、药品。

化工行业：纯碱、氮磷钾复合肥、高岭土、膨润土、白碳黑、碳黑、磷石膏、氧化氟化钠、硝酸钙、碳酸镁、氰化钠、氢氧化铝、硫酸钡、硫酸钙、碳酸钙、染料、分子筛、皂素。

特点

桨叶干燥机能耗低：由于间接加热，没有大量携带空气带走热量，干燥器外壁又设置保温层，对桨状物料，蒸发1KG水仅需1.22kg水蒸汽。

桨叶干燥机系统造价低：单位有效容积拥有巨大的传热面，就缩短了处理时间，设备尺寸变小。就极大地减少了建筑面积及建筑空间。

处理物料范围广：使用不同热介质，既可处理热敏性物料，又可处理需高温处理的物料。常用介质有：水蒸汽、导热油、热水、冷却水等。既可连续操作也可间歇操作，可在很多领域应用。

环境污染小：不使用携带空气，粉尘物料夹带很少。物料溶剂蒸发量很小，便与处理。对有污染的物料或需回收溶剂的工况，可采用闭路循环。

操作费用第：该设备正常操作，仅1-2人/天。低速搅拌及合理的结构。磨损量晓，维修费用很低。

操作稳定：由于楔型桨叶特殊的压缩—膨胀搅拌作用，使物料颗粒充分与传热面接触，再轴向区间内，物料的温度、湿度、混合度梯度很小，从而保证了工艺的稳定性。

The company on the basis of absorbing domestic and foreign advanced technology, to improve and optimize the model of hollow blade dryer design, the paste, granule, powder and slurry materials indirect heating or cooling, heating, cooling and drying can be completed, sterilization, low temperature calcination reaction, unit operation. In the equipment, the special wedge type heat transfer blade has high heat transfer efficiency and self-cleaning function of heat transfer surface.
Summary
The hollow shaft is densely arranged with a wedge type hollow blade. Heat transfer area of the unit effective volume is very large, the temperature of the hot medium from -40 C to 320 degrees C, can be water vapor, can also be liquid body: such as hot water, thermal oil, etc.. Indirect conduction heating, does not carry air to take away heat, heat transfer surface with self-cleaning function. The material particles and the wedge surface of the relative motion of greedy students washing, to wash off the wedge surface adhesion material, the operation has been maintained in the heat transfer surface cleaning. Paddle dryer shell for W type, the shell is generally arranged two to four hollow stirring shaft. The shell is provided with a sealing end cover and a material level height, so that the heat transfer surface is covered by the material and can play a full role. The heat medium passes through the rotary joint, flows through the shell jacket and the hollow stirring shaft, and the hollow stirring shaft has different internal structures according to the type of the heat medium, so as to ensure the best heat transfer effect.
application
Blade dryer has been successfully used in food, chemical, petrochemical, dyes, industrial sludge and other fields. The characteristics of heat transfer, cooling and stirring of the equipment can be used to perform the following operations: calcination (low temperature), cooling, drying (solvent recovery), heating (melting), reaction and sterilization. The mixing blade is also a heat transfer surface, so that the heat transfer area of the unit effective volume is increased, and the processing time is shortened. The heat transfer surface of the wedge blade has self-cleaning function. Compression expansion mixing function to make the material mixed evenly. The material moves along the axial direction as the piston flow, and the temperature, humidity and the degree of mixing of the material are small in the axial interval.
Heat transfer oil can be used as heat medium, and the blade dryer can be used for low temperature calcination. Such as: two calcium sulfate (Ca2SO4.2H2O) calcined into calcium sulfate hemihydrate (Ca2SO4.1/2H2O). Sodium bicarbonate (Nahco3) was calcined into soda ash (Na2CO3) and so on.
Through the cooling medium, such as water, cooling water can be used to cool. Such as: used in blades of soda industry type alkali cooling machine, replace old-fashioned air cooling alkali cooling machine, energy saving and exhaust gas treatment equipment, reduce operating costs, but also can be used for titanium, nickel iron alloy powder and powder material cooling. The mechanism can be used to cool the material from 1000 C to less than 40 C.
Dry, the most important function of the equipment, do not use hot air, so that solvent recovery, energy consumption, environmental control in an easy to deal with the ideal state. Solvent for recovery. Flammable oxidation sensitive material is particularly suitable. Has been widely used in fine chemical, petrochemical, dyestuff industry.
The uniformity of temperature, humidity and mixing degree in the axial section, so that the equipment can be used for heating or melting, or some solid material reaction. Compound fertilizer and modified starch industry have been successfully used. The paddle dryer can be used to sterilize food and flour. The large heating area in the effective volume of the unit quickly heats the material to the sterilization temperature, avoiding the long time heating and changing the material quality.
Adaptive material
Petrochemical Industry: polyolefin powder, polycarbonate resin, high and low density polyethylene, linear low density polyethylene, polyvinyl acetal, nylon 6, nylon 66, nylon 12, acetate fiber, polyphenylene sulfide. Acrylic resin, engineering plastics, polyvinyl chloride, polyvinyl alcohol, polystyrene, polypropylene, polyester, polyoxymethylene, styrene - acrylonitrile copolymer, ethylene - ice copolymer.
Environmental protection industry: PTA sludge, electroplating sewage sludge, boiler ash, pharmaceutical waste residue, sugar factory waste residue, monosodium glutamate factory waste residue, coal ash.
Feed industry: fried, bone based feed, distiller's grains, food corner, apple pomace, orange peel, soybean meal, chicken bone feed, fish meal, feed additives, bio sludge.
Food industry: starch, cocoa beans, corn kernels, salt, modified starch, pharmaceuticals.
Chemical industry: NPK compound fertilizer, sodium carbonate, kaolin, bentonite, white carbon black, carbon black, phosphorus gypsum, sodium fluoride, calcium oxide, magnesium carbonate, sodium cyanide, aluminum hydroxide, barium sulfate, calcium sulfate, calcium carbonate, dyes, molecular sieve, saponin.
Characteristic
Blade dryer low energy consumption: as a result of indirect heating, there is no large amount of carrying air to take away the heat, the outer wall of the dryer and set the insulation layer, paddle shaped material, evaporation of 1KG water only 1.22kg water vapor.
The system cost is low: the unit effective volume has the huge heat transfer surface, reduced the processing time, the equipment size becomes small. Greatly reduced the construction area and building space.
A wide range of materials with different heat medium, which can handle the heat sensitive materials and processing, the need for high temperature processing materials. Commonly used media are: steam, heat conduction oil, hot water, cooling water, etc.. The utility model can be operated continuously or intermittently, and can be applied in many fields.
Environmental pollution is small: do not use to carry air, dust material entrainment very little. The amount of solvent evaporation is very small. In the case of contaminated materials or solvent recovery, closed circuit.
Operating costs: the normal operation of the equipment, only 1-2 person / day. Low speed mixing and reasonable structure. Low wear, low maintenance costs.
Stable operation: due to the special compression, expansion and agitation of the wedge blade