设备简介Equipment Introduction

 滚筒干燥机（又称转鼓干燥器、回转干燥机等）是一种接触式内加热传导型的干燥机械。在干燥过程中，热量由滚筒的内壁传到其外壁，穿过附在滚筒外壁面上被干燥的食品物料，把物料上的水分蒸发，是一种连续式干燥的生产机械。滚筒干燥机在干燥物料时干燥时间短，一般约为7-30s，干燥的产品没有处于高温的危险，适用于热敏性物料的干燥，不管干燥的物料浆液粘度高或低均能对其进行干燥；热效率高。 

A drum dryer (also known as a rotary drum dryer, rotary dryer, etc.) is a contact type internal heating conduction type drying machinery. During the drying process, heat is transferred from the inner wall of the drum to its outer wall, passing through the dried food materials attached to the outer wall of the drum, evaporating the moisture on the materials. It is a continuous drying production machinery. The drum dryer has a short drying time when drying materials, usually about 7-30 seconds. The dried product is not at risk of high temperature and is suitable for drying thermosensitive materials. Regardless of the high or low viscosity of the dried material slurry, it can dry it; High thermal efficiency.

工作原理operational principle

滚筒干燥机的转筒是略带倾斜并能回转的圆筒体，湿物料从一端上部进入，干物料从另一端下部收集。热风从进料端或出料端进入，从另一端上部排出。筒内装有顺向抄板，使物料在筒体回转过程中不断抄起又洒下，使其充分与热气流接触，以提高干燥效率并使物料向前移动。干燥物料热源一般为热空气、高温烟道气、水蒸气等。

滚筒干燥机的工作过程为：需要干燥处理的料液由高位槽流人滚筒干燥器的受料槽内，由布膜装置使物料薄薄地（膜状）附在滚筒表面，滚筒内通有供热介质，食品工业多采用蒸汽，压力一般在0.2～6MPa，温度在 120～150℃之间，物料在滚筒转动中由筒壁传热使其湿分汽化，滚筒在一个转动周期中完成布膜、汽化、脱水等过程，干燥后的物料由刮刀刮下，经螺旋输送至成品贮存槽，最后进行粉碎或直接包装。在传热中蒸发出的水分，视其性质可通过密闭罩，引入到相应的处理装置内进行捕集粉尘或排放。

The rotary drum of a drum dryer is a slightly inclined and rotatable cylinder, where wet materials enter from the upper part of one end and dry materials are collected from the lower part of the other end. Hot air enters from the feed or discharge end and is discharged from the upper part of the other end. The cylinder is equipped with a forward cutting plate, which continuously picks up and sprinkles materials during the rotation process of the cylinder, making them fully in contact with the hot air flow to improve drying efficiency and move the materials forward. The heat source for drying materials is generally hot air, high-temperature flue gas, water vapor, etc.

The working process of a drum dryer is as follows: the material liquid that needs to be dried flows from the high-level groove into the receiving groove of the drum dryer. The material is thinly (in the form of a film) attached to the surface of the drum by a film distribution device, and there is a heating medium inside the drum. Steam is commonly used in the food industry, with a pressure of 0.2-6MPa and a temperature between 120-150 ℃. The material undergoes heat transfer from the drum wall during the rotation of the drum, causing its moisture to vaporize, The drum completes the processes of film distribution, vaporization, dehydration, etc. in one rotation cycle. The dried material is scraped off by a scraper, spiral transported to the finished product storage tank, and finally crushed or directly packaged. The water evaporated during heat transfer can be introduced into the corresponding treatment device through a closed cover to capture dust or discharge according to its properties.

设备特点Equipment characteristics

操作连续，能够得到均匀的干燥产品；滚筒干燥机在干燥物料时干燥时间短，一般约为7-30s，干燥的产品没有处于高温的危险，适用于热敏性物料的干燥，但壁面也有可能产生过热；不管干燥的物料浆液粘度高或低均能对其进行干燥；热效率高；因干燥机内不会剩残留产品，少量物料也可以干燥；滚筒干燥机的操作参数调整范围广，并易于调整；滚筒干燥机内易于清理，改变用途容易；废气不带走物料，因此不需要用除尘设备等干燥机配件。滚筒干燥机较广泛的应用于浆状物料的干燥，像干燥酵母、抗菌素、乳糖、淀粉浆、亚硝酸钠、染料、碳酸钙及蒸馏废液等均能进行干燥处理。

Continuous operation, able to obtain uniform dry products; The drum dryer has a short drying time when drying materials, usually about 7-30 seconds. The dried product is not at risk of high temperature and is suitable for drying thermosensitive materials, but the wall may also overheat; Regardless of whether the viscosity of the dried material slurry is high or low, it can be dried; High thermal efficiency; Because there is no residual product left in the dryer, a small amount of material can also be dried; The operating parameters of the drum dryer have a wide range of adjustment and are easy to adjust; The drum dryer is easy to clean inside and can be easily changed for different purposes; Waste gas does not take away materials, so there is no need to use dust removal equipment or other drying machine accessories. Drum dryers are widely used in the drying of pulp materials, such as drying yeast, antibiotics, lactose, starch slurry, sodium nitrite, dyes, calcium carbonate, and distilled waste liquid, which can all be dried.

应用范围Application scope

适用于化工、矿工、冶金等行业，如矿石、矿渣、煤、金属粉末、粘土、硅藻土、高岭土。

农业、饲料、肥料行业，如秸秆、牧草、树叶、鱼粉、玉米酱、淀粉渣、酒糟、药渣、果渣、酱油渣、甘蔗渣、草炭、有机复合肥、污泥、水产品废料、食品厂废料、屠宰厂废料、有机肥料、无机肥料、磷肥硫铵。

对有特殊要求的粉状、颗粒状物料干燥机。如各种结晶体、轻质碳酸钙、活性白土、磁粉、石墨、无机泥浆、陶土、石灰浆、矿石泥浆、磷矿渣、铝厂赤泥。

要求低温干燥，且需要大批量连续干燥的物料。 载热体的选择载热体及其最高温度的决定在于被处理固体物料的性质以及其是否允许被污染等因素。

若被处理的固体物料不怕高温，且非最后产品，可以允许在处理过程中稍被污染，可采用热风炉或烟道气作为载热体，则能得到较高的体积蒸发率和热效率。例如，对于进口含水量较高的物料干燥，采用气体进口温度为300度时，干燥器的体积蒸发率为5kg/m3/h热效率为30%—50%；若气体进口温度为500度，则体积蒸发率为35kg/m3/h；热效率为50%—70%。所以对于处理矿石、砂烁、煤、过磷硫酸钙等物料的转筒干燥器斗带有直接产生烟道气的燃烧炉，气燃料可以采用煤、油、天然气、液化气等。

如处理的物料不允许被污染，需要的温度高，则可用我公司新型产品煤气发生炉作载热体，本产品节能环保、热效率高。如当地的环保要求很高，又想节能、卫生采用煤气发生炉将是最佳选择。煤气发生炉在节能方面比燃烧炉至少节能在20%以上,在人工上也大大节省不少，一般煤气发生炉有一名工作即可操作，且不需要不停的加煤，另外煤气发生炉可以随停随用，长达10天不工作，下次还可以继续使用。

也有用间接加热的方式，即热量由金属壁传给被干燥物料，如外加热式的转筒式干燥器。

1、从原料形态上，离心脱水滤饼、压滤滤饼；可自由流动的粉状、颗粒、片状、纤维等物料的干燥。

2、从物料的应用范围上，广泛应用于矿产品、建材、化工产品、复合肥、有机粉体、饲料、酒槽、淀粉渣、玉米渣、豆渣等的干燥。

3、从回转滚筒干燥机的机构上，可分为直接、间接加热、通气管加热、蒸汽管间接加热、复式加热等多种结构形式。

4、从干燥温度上，可从60℃-600℃范围内选择，原则上温度愈高，蒸发强度愈高。因此设备体积小、投资省、单位能耗低

Suitable for industries such as chemical, mining, and metallurgy, such as ore, slag, coal, metal powder, clay, diatomaceous earth, and kaolin.

Agriculture, feed, and fertilizer industries, such as straw, grass, leaves, fish meal, corn sauce, starch residue, distiller's grains, medicinal residue, fruit residue, soy sauce residue, sugarcane residue, peat, organic compound fertilizer, sludge, aquatic product waste, food factory waste, slaughterhouse waste, organic fertilizer, inorganic fertilizer, and ammonium phosphate fertilizer.

For powder and granular material dryers with special requirements. Such as various crystals, lightweight calcium carbonate, activated clay, magnetic powder, graphite, inorganic mud, clay, lime slurry, ore mud, phosphorus slag, aluminum plant red mud.

Materials that require low-temperature drying and require continuous drying in large quantities. The selection of heat carrier and its maximum temperature depend on factors such as the properties of the treated solid material and whether it is allowed to be contaminated.

If the solid material being processed is not afraid of high temperature and is not the final product, it can be allowed to be slightly contaminated during the processing. A hot air furnace or flue gas can be used as a heat carrier to achieve higher volume evaporation rate and thermal efficiency. For example, for drying materials with high imported moisture content, when the gas inlet temperature is 300 degrees, the volume evaporation rate of the dryer is 5kg/m3/h, and the thermal efficiency is 30% -50%; If the gas inlet temperature is 500 degrees, the volumetric evaporation rate is 35kg/m3/h; The thermal efficiency is between 50% and 70%. So for rotary drum dryers with combustion furnaces that directly produce flue gas for processing materials such as ore, sand, coal, and calcium persulfate, coal, oil, natural gas, liquefied gas, etc. can be used as fuel.

If the processed materials are not allowed to be contaminated and require a high temperature, our company's new product, the gas generator, can be used as a heat carrier. This product is energy-saving, environmentally friendly, and has high thermal efficiency. If the local environmental protection requirements are high and you want to save energy and maintain hygiene, using a gas generator will be the best choice. A gas generator can save at least 20% more energy than a combustion furnace in terms of energy efficiency, and it also greatly saves a lot of labor. Generally, a gas generator can be operated by one worker without the need for continuous coal addition. In addition, a gas generator can be stopped and used at any time, without working for up to 10 days, and can continue to be used next time.

There is also an indirect heating method, which transfers heat from the metal wall to the dried material, such as an externally heated rotary dryer.

1. From the perspective of raw material morphology, centrifugal dehydration filter cake and pressure filter cake; Drying of freely flowing materials such as powders, particles, flakes, fibers, etc.

2. From the application scope of materials, it is widely used in the drying of mineral products, building materials, chemical products, compound fertilizers, organic powders, feed, wine tanks, starch residue, corn residue, soybean residue, etc.

3. From the mechanism of the rotary drum dryer, it can be divided into various structural forms such as direct and indirect heating, ventilation pipe heating, steam pipe indirect heating, and compound heating.

4. In terms of drying temperature, it can be selected from the range of 60 ℃ -600 ℃. In principle, the higher the temperature, the higher the evaporation intensity. Therefore, the equipment has a small volume, low investment, and low unit energy consumption

技术参数表Technical parameter table