WO2020119521A1 - 多层微波加热和灭菌的真空带式干燥机及其玉米浆的干燥和灭菌的方法 - Google Patents

多层微波加热和灭菌的真空带式干燥机及其玉米浆的干燥和灭菌的方法 Download PDF

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WO2020119521A1
WO2020119521A1 PCT/CN2019/122679 CN2019122679W WO2020119521A1 WO 2020119521 A1 WO2020119521 A1 WO 2020119521A1 CN 2019122679 W CN2019122679 W CN 2019122679W WO 2020119521 A1 WO2020119521 A1 WO 2020119521A1
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microwave
microwave heating
conveyor belt
belt
sterilizing
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PCT/CN2019/122679
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English (en)
French (fr)
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邹传军
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武汉美味源生物工程有限公司
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Priority claimed from CN201822090773.XU external-priority patent/CN210492466U/zh
Priority claimed from CN201811521092.2A external-priority patent/CN109566958A/zh
Application filed by 武汉美味源生物工程有限公司 filed Critical 武汉美味源生物工程有限公司
Publication of WO2020119521A1 publication Critical patent/WO2020119521A1/zh

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    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
    • A23L3/40—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by drying or kilning; Subsequent reconstitution
    • A23L3/54—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by drying or kilning; Subsequent reconstitution using irradiation or electrical treatment, e.g. ultrasonic waves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
    • F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
    • F26B3/347—Electromagnetic heating, e.g. induction heating or heating using microwave energy

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  • the invention relates to a dryer and a drying method, in particular to a multi-layer microwave heating and sterilizing vacuum belt dryer and a method of drying and sterilizing corn syrup.
  • the material passes A feed nozzle is evenly coated on the special heating conveyor belt.
  • the running speed of the conveyor belt can be adjusted to adjust the output and control the moisture.
  • the conveyor belt runs under the traction of the roller and moves on the heating plate.
  • the heating plate There is a cooling section in the rear section of the cooling plate. There is cooling water flowing in the cooling plate. After the material cools, it becomes brittle.
  • the material is stripped, the material falls into the material tank, and is sent out of the equipment through the twisting dragon.
  • the vacuum belt dryer has a very important defect and low operating efficiency.
  • the vacuum belt dryer is completely heated by conduction, the belt runs on the surface of the heating plate and the cooling plate, the steel plate has an interlayer, steam and heat conduction oil are used in the middle, and the steel plate heats the belt. Under vacuum, the material is dried.
  • the whole process has low heat conduction efficiency and low heating intensity.
  • per square meter of heating area using hot water or heat conduction oil for heating, it can only evaporate more than 1 kg of water per hour. The largest equipment does not evaporate per hour. Up to 200 kg, so the equipment is only suitable for production environments with high material value and small throughput.
  • Corn syrup is a by-product of the production of corn starch.
  • corn starch To make corn starch, the corn kernels need to be soaked with sulfurous acid. The soaking solution is concentrated to obtain a yellow-brown liquid, called corn syrup, which is rich in soluble protein, auxin and other organic substances. It is very good Feed and fermentation raw materials. The concentration of corn syrup is about 40-50%.
  • factories In order to facilitate storage and use, factories generally use spray drying to make corn syrup into dry powder. However, in actual production, it is found that spray drying is prone to fire accidents. This method has been eliminated by most factories. . At the same time, spray drying has high energy consumption and large investment, and the value of corn syrup is not high. It is not economically feasible to use spray drying to produce corn syrup.
  • Corn syrup has high protein content and is rich in nutrients and is a good feed.
  • corn is inevitably contaminated by mold, which produces highly toxic aflatoxin, vomitotoxin, and zearalenone. Substances, if these toxic substances exceed the standard, it will pose a great threat to the safe production of livestock and poultry.
  • mycotoxins will cause the following harm to livestock and poultry: reduce immunity, inhibit the production of body antibodies, reduce production performance, slow growth, vomiting, diarrhea, increased mortality, etc. Since there is no effective and economical sterilization method, the application of corn syrup in the feed industry is greatly restricted.
  • the purpose of the present invention is to overcome the shortcomings of the prior art, to provide a multi-layer microwave heating and sterilization vacuum belt dryer and a method for drying and sterilizing corn syrup, the dryer has two or more layers
  • Multi-layer microwave heating equipment uses the penetration of microwave in vacuum to directly heat the polar molecules of the material. Under the action of microwave, it is different from other heat conduction methods from the outside to the inside, heating directly from the inside. It has the characteristics of fast heating, high strength and uniformity. At the same time, microwave has a clear sterilization effect.
  • Microwave sterilization mainly has two functions:
  • the thermal effect of microwave energy Under the action of a certain intensity microwave field, insects and bacteria in food will absorb microwave energy to heat up due to molecular polarization, thereby denaturing their proteins and losing their biological activity.
  • the thermal effect of microwave mainly plays the role of rapid temperature sterilization;
  • microwave energy the high-frequency electric field also changes the membrane potential and polar molecular structure, causing the protein and physiologically active substances in the microorganism to mutate and lose vitality or death.
  • sterilization it plays a special role not found in conventional physical sterilization, and is also one of the causes of bacterial death.
  • Drying under vacuum solves the problem of corn syrup spray drying and flammability, and has a significant energy saving effect; at the same time, it solves the problem of corn sterilization.
  • the present invention has designed a multi-layer microwave heating and sterilizing vacuum belt dryer, which includes a tank body, which is provided with a plurality of rows of parallel and horizontal circulating conveyances spaced from top to bottom Belts. Both ends of the circulating conveyor belt are provided with conveying rollers.
  • the circulating conveying belt between the conveying rollers is equipped with a microwave heating sterilization device.
  • the microwave heating sterilization device from one end of the circulating conveying belt to the other end is in turn It is divided into a first microwave suppression zone, a microwave heating zone and a trailing microwave suppression zone.
  • the microwave heating sterilization device includes a microwave action chamber provided outside the circulating conveyor belt.
  • the microwave action chamber is circulated and conveyed in the first microwave suppression zone
  • a material heating plate is arranged under the belt, and a material cooling plate is arranged under the circulating conveying belt in the microwave suppression zone at the rear.
  • a plate is arranged on the upper surface of the microwave action chamber of the microwave heating zone, and a plurality of rows of microwaves are arranged horizontally at the plate Component, the conveying roller at one end of the circulating conveying belt is fixed on the tank wall by a fixed shaft, a feeding nozzle is correspondingly arranged above one end of the circulating conveying belt, and the middle of the feeding nozzle is arranged on the feeding rotating shaft,
  • the other end of the feed nozzle is connected to the feed pump outside the tank through a feed hose, both ends of the feed rotating shaft are fixed on the tank wall of the tank, and one end of the feed rotating shaft extends out of the tank wall and is connected to the feed motor;
  • a discharge auger is provided below the other end of the circulating conveyor belt, and one or more vacuum su
  • each row of microwave components is composed of 2 to 30 microwave elements.
  • a belt idler 2.1 is provided below the circulating conveyor belt in the microwave heating zone.
  • the discharge auger includes a U-shaped groove with an upper opening, a cold water interlayer is provided in the wall of the U-shaped groove, a auger shaft is provided in the U-shaped groove, and the auger shaft is provided to extend
  • the U-shaped groove is connected with a stirring motor.
  • the two ends of the tank body are respectively provided with access doors.
  • the circulating conveyor belt has 2 to 10 rows.
  • the invention also provides a method for drying and sterilizing corn syrup using a vacuum belt dryer with multi-layer microwave heating and sterilization, which includes the following steps:
  • the concentrated corn syrup is evenly coated on the circulating conveyor belt through a feed nozzle and enters the first microwave suppression zone, while adjusting output and controlling moisture; the circulating conveyor belt is under the traction of the conveyor drum Pass through the microwave heating zone; where the concentration of corn syrup concentration is ⁇ 50%
  • the microwave heating device After the microwave heating device is used in the present invention, the production efficiency of the equipment will be greatly improved, the heating intensity of the vacuum belt dryer will be increased by many times, and the dehydration amount per unit heating area will even be increased by 10 times.
  • the general concentration of corn syrup is 38-40%.
  • the present invention concentrates the material to a concentration of 50% or even 70%, which greatly reduces the burden of drying.
  • Drying under vacuum solves the problem of spray drying and flammability of corn slurry, and has a significant energy saving effect; at the same time, it solves the problem of sterilization of corn slurry.
  • the vacuum belt drying of the present invention operates under totally enclosed conditions, and no dust or odor is emitted into the air, and no pollution is formed.
  • FIG. 1 is a schematic diagram of the structure of the multilayer microwave heating and sterilizing vacuum belt dryer of the present invention
  • Figure 2 is a cross-sectional view of a vacuum belt dryer
  • FIG. 3 is a schematic diagram of the discharge twister
  • the multi-layer microwave heating and sterilizing vacuum belt dryer as shown in FIGS. 1 to 3 includes a tank body 1 in which two rows of parallel and horizontal circulating conveyor belts 2 are arranged at intervals from top to bottom At both ends of the circulating conveyor belt 2 are provided with conveying rollers 3, a microwave heating sterilization device 4 is installed on the circulating conveying belt 2 between the conveying rollers 3, and the microwave heating sterilization device 4 from one end of the circulating conveyor belt 2 to the other end Divided into the first microwave suppression zone 4.a, microwave heating zone 4.b and tail microwave suppression zone 4.c, the microwave heating sterilization device 4 includes a microwave action chamber 4.1 and a microwave action chamber 4.1 wrapped with a circulating conveyor belt 2 In the first microwave suppression zone 4.a, there is a material heating plate 4.2 under the circulating conveyor belt 2, and in the rear microwave suppression zone 4.c, there is a material cooling plate 4.3 under the circulating conveyor belt 2, and the microwave heating zone 4.b The upper surface of the microwave action chamber 4.1 is provided with a plate 4.11, and the plate 4.11
  • the conveying roller 3 at one end of the circulating conveying belt 2 is fixed on the wall of the tank body 1 by a fixed shaft 5, a feeding nozzle 6 is correspondingly provided above one end of the circulating conveying belt 2, and the central part of the feeding nozzle 6 is provided on the feeding rotating shaft 7, feeding
  • the other end of the spray head 6 is connected to the feed pump 6.2 outside the tank through a feed hose 6.1, both ends of the feed rotating shaft 7 are fixed on the tank wall of the tank body 1, and one end of the feed rotating shaft 7 extends out of the tank wall and feed motor 10 connection;
  • the discharge conveyor 3 is provided with a discharge auger 8 below the other end, the discharge auger 8 includes a U-shaped groove 8.1 with an upper opening, the U-shaped groove 8.1 is provided with a cold water interlayer 8.2 in the groove wall, and the U-shaped groove 8.1
  • the auger shaft 8.3 is set, and the auger shaft 8.3 is set to protrude from the U-shaped groove 8.1 and the stirring motor 8.4 is connected
  • Three vacuum suction ports 9 are opened on the upper surface of the tank body 1; inspection doors 1.1 are provided on both ends of the tank body 1, respectively.
  • the method for drying and sterilizing corn syrup by using the microwave heating multi-layer vacuum belt dryer includes the following steps:
  • the vacuum pump is used to evacuate through the real gas extraction port 10;
  • the concentrated corn syrup is evenly coated on the circulating conveyor belt 2 through a feed nozzle and enters the first microwave suppression zone 4.a, while adjusting the output and controlling moisture; the circulating conveyor belt 2 is Under the traction of the conveying drum 3, it passes through the microwave heating zone 4.b, where the concentration of corn syrup concentration is ⁇ 50%;

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  • Health & Medical Sciences (AREA)
  • Nutrition Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Food Science & Technology (AREA)
  • Microbiology (AREA)
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Abstract

本发明公开一种多层微波加热和灭菌的真空带式干燥机及其玉米浆的干燥和灭菌的方法，它包括罐体，所述罐体内由上至下间隔设置有多排相互平行且水平的循环输送皮带，所述循环输送皮带两端均设置有输送滚筒，所述输送滚筒之间的循环输送皮带上装置有微波加热灭菌装置，所述循环输送皮带一端上方对应设置有进料喷头，所述进料喷头中部设置在进料转轴上，所述进料喷头另一端通过进料软管与罐体外的进料泵连接，所述循环输送皮带另一端下方设置有出料绞龙。本发明在使用微波加热装置后，设备的生产效率将大大提高，将真空带式干燥机的加热强度提高很多倍，单位加热面积的脱水量甚至提高10倍。

Description

多层微波加热和灭菌的真空带式干燥机及其玉米浆的干燥和灭菌的方法 技术领域
本发明涉及干燥机以及干燥方法，具体涉及一种多层微波加热和灭菌的真空带式干燥机及其玉米浆的干燥和灭菌的方法。
背景技术
现有真空带式干燥机能耗低、运行温度低、运行连续性好的干燥设备，全封闭运行，无污染，被广泛用于食品、医药、化工行业的干燥。这种真空干燥机主要由设备罐体、真空泵、进料分布器、皮带输送机、加热板、冷却板、出料绞龙这大部分组成。这种干燥机在真空、低温、全封闭的状态进行，蒸发的温度可以根据要求控制，比如40-60℃。运行方式如下：首先，干燥机密闭，真空泵抽真空，加热板开始工作，加热板一般采用热水、蒸汽、导热油做热源，传送带在加热板上移动，设备达到要求的真空度后，物料经过一个进料喷头均匀涂在特制的加热输送带上，传送带运行的速度可以调整，调节产量和控制水分，同时，传送带在滚筒的牵引下运行，在加热板上移动，在物料干燥后，加热板的后段，设有冷却段，冷却板中有冷却水流动，物料冷却后，变脆，在传送带的末端，将物料剥离，物料掉入料槽，通过绞龙送出设备。
但是，真空带式干燥机有个非常重要的缺陷，运行效率低。真空带式干燥机，完全靠传导加热，皮带在加热板和冷却板表面运行，钢板带有夹层，中间使用蒸汽、导热油，钢板加热皮带，在真空下，实现对物料的干燥。整个过程导热效率低，加热强度低，理论上，每平方加热面积，使用热水或导热油加热，每小时最多只能蒸发1公斤多的水，最大型的设备，每小时的蒸发量也不到200公斤，因此该设备只适合用于物料价值高、处理量小的生产环境。
玉米浆是生产玉米淀粉的副产品，制造玉米淀粉需将玉米粒先用亚硫酸浸泡，浸泡液浓缩即得到黄褐色的液体，叫玉米浆，含有丰富的可溶性蛋白、生长素等有机物，是非常好的饲料和发酵原料。玉米浆浓度大约40-50％，为了便于保存和使用，工厂一般采用喷雾干燥将玉米浆制成干粉，但在实际生产中发现，喷雾干燥很容易发生火灾事故，这个方法已经被大多数工厂淘汰。同时，喷雾干燥能耗高，投资大，玉米浆的价值不高， 使用喷雾干燥生产玉米浆，经济上也不可行。
玉米浆蛋白含量高，营养丰富，是很好的饲料，但由于天气的因素和贮藏的原因，玉米难免被霉菌污染，产生剧毒的黄曲霉素、呕吐毒素、玉米赤霉烯酮等有害物质，如果这些有毒物质超标，将对畜禽的安全生产造成很大的威胁。如果饲喂了发霉的饲料，霉菌毒素会对畜禽造成以下危害：降低免疫力，抑制机体抗体的产生、生产性能下降，生长缓慢、呕吐、腹泻、死亡率增加等等。由于没有有效、经济的灭菌方法，大大限制了玉米浆在饲料行业中的应用。
发明内容
本发明的目的在于克服现有技术的不足，提供了一种多层微波加热和灭菌的真空带式干燥机及其玉米浆的干燥和灭菌的方法，该干燥机带有二层或多层微波加热设备，利用微波在真空的穿透作用，直接对物料的极性分子加热，在微波作用下，不同于其他热量从外面往里传导的方式，直接从内部加热。具有加热速度快、强度高、均匀等特点。同时，微波具有明确的杀菌作用。微波杀菌主要是两个方面的作用：
1、微波能的热效应：在一定强度微波场的作用下，食品中的虫类和菌体会因分子极化现象，吸收微波能升温，从而使其蛋白质变性，失去生物活性。微波的热效应主要起快速升温杀菌作用；
2、微波能的非热效应：高频的电场也使其膜电位、极性分子结构发生改变，使微生物体内蛋白质和生理活性物质发生变异，而丧失活力或死亡。在灭菌中起到了常规物理灭菌所没有的特殊作用，也是造成细菌死亡原因之一。实践证明采用微波装置在杀菌温度、杀菌时间、产品品质保持、产品保质期及节能方面都有明显的优势。
在真空状态下干燥，解决了玉米浆喷雾干燥易燃的问题，节能效果显著；同时解决了玉米浆灭菌的问题。
为实现上述目的，本发明所设计一种多层微波加热和灭菌的真空带式干燥机，它包括罐体，所述罐体内由上至下间隔设置有多排相互平行且水平的循环输送皮带，所述循环输送皮带两端均设置有输送滚筒，所述输送滚筒之间的循环输送皮带上装置有微波加热灭菌装置，所述循环输送皮带一端至另一端的微波加热灭菌装置依次分为首部微波抑制区，微波加热区和尾部微波抑制区，所述微波加热灭菌装置包括设置在循环输送皮带 外的微波作用腔室，所述微波作用腔室内，首部微波抑制区中循环输送皮带下方设置有物料加热板，和尾部微波抑制区中循环输送皮带下方设置有物料冷却板，所述微波加热区的微波作用腔室上表面设置有平板，所述平板水平间隔设置有多排微波组件，所述循环输送皮带一端的输送滚筒通过固定轴固定在罐体壁上，所述循环输送皮带一端上方对应设置有进料喷头，所述进料喷头中部设置在进料转轴上，所述进料喷头另一端通过进料软管与罐体外的进料泵连接，所述进料转轴两端固定在罐体的罐壁上，且进料转轴一端伸出罐壁与进料电机连接；所述循环输送皮带另一端下方设置有出料绞龙，所述罐体上表面开设有一个或多个真空抽气口。
进一步地，所述平板上设置有2～5微波组件，每排微波组件由2～30个微波元件组成。
再进一步地，所述微波加热区的循环输送皮带下方设置有皮带托辊2.1。
再进一步地，所述出料绞龙包括上部开口的U型槽，所述U型槽槽壁内设置有冷水夹层，所述U型槽内设置绞龙轴，所述绞龙轴设置伸出U型槽连接有搅拌电机。
再进一步地，所述罐体两端分别设置有检修门。
再进一步地，所述循环输送皮带为2～10排。
本发明还提供了一种利用多层微波加热和灭菌的真空带式干燥机对玉米浆的干燥和灭菌方法，包括以下步骤：
1)首先干燥机密闭，真空泵通过真气抽气口进行抽真空；
2)当干燥机达到要求的真空度后，浓缩的玉米浆经过一个进料喷头均匀涂在循环输送皮带上进入首部微波抑制区，同时调节产量和控制水分；循环输送皮带在输送滚筒的牵引下在微波加热区穿过；其中，玉米浆浓缩的浓度≥50％
3)物料干燥后进入尾部微波抑制区，循环输送皮带在输送滚筒的牵引下在尾部微波抑制区冷却，物料冷却变脆，在循环输送皮带的末端物料剥离掉入料槽出料蛟龙的U型槽，通过出料蛟龙送出干燥机。
本发明的有益效果：
1、本发明在使用微波加热装置后，设备的生产效率将大大提高，将真空带式干燥机的加热强度提高很多倍，单位加热面积的脱水量甚至提高10倍。
2、玉米浆一般的浓度是38～40％，本发明将物料浓缩到50％甚至70％的浓度，大大 减少了干燥的负担。
3、在真空状态下干燥，解决了玉米浆喷雾干燥易燃的问题，节能效果显著；同时解决了玉米浆灭菌的问题。
4、生产在真空下进行，不可能产生火灾，没有安全风险。
5、本发明真空带式干燥在全封闭条件下运行，没有任何粉尘或气味散发到空中，不形成任何污染。
附图说明
图1为本发明的多层微波加热和灭菌的真空带式干燥机的结构示意图；
图2为真空带式干燥机的剖视图；
图3为出料绞龙的示意图；
图中，罐体1、检修门1.1、循环输送皮带2、输送滚筒3、微波加热灭菌装置4、首部微波抑制区4.a、微波加热区4.b、尾部微波抑制区4.c、微波作用腔室4.1、平板4.11、物料加热板4.2、物料冷却板4.3、微波组件4.4、微波元件4.41、固定轴5、进料喷头6、进料软管6.1、进料泵6.2、进料转轴7、出料绞龙8、U型槽8.1、冷水夹层8.2、绞龙轴8.3、搅拌电机8.4、真空抽气口9、进料电机10。
具体实施方式
下面结合具体实施例对本发明作进一步的详细描述，以便本领域技术人员理解。
如图1～3所示的多层微波加热和灭菌的真空带式干燥机，它包括罐体1，罐体1内由上至下间隔设置有2排相互平行且水平的循环输送皮带2，循环输送皮带2两端均设置有输送滚筒3，输送滚筒3之间的循环输送皮带2上装置有微波加热灭菌装置4，循环输送皮带2一端至另一端的微波加热灭菌装置4依次分为首部微波抑制区4.a，微波加热区4.b和尾部微波抑制区4.c，微波加热灭菌装置4包括包裹有循环输送皮带2的微波作用腔室4.1，微波作用腔室4.1内，首部微波抑制区4.a中循环输送皮带2下方设置有物料加热板4.2，和尾部微波抑制区4.c中循环输送皮带2下方设置有物料冷却板4.3，微波加热区4.b的微波作用腔室4.1上表面设置有平板4.11，平板4.11水平间隔设置有3排微波组件4.4，每排微波组件4.4由7个微波元件组成；微波加热区4.b的循环输送皮 带2下方设置有皮带托辊2.1；
循环输送皮带2一端的输送滚筒3通过固定轴5固定在罐体1壁上，循环输送皮带2一端上方对应设置有进料喷头6，进料喷头6中部设置在进料转轴7上，进料喷头6另一端通过进料软管6.1与罐体外的进料泵6.2连接，进料转轴7两端固定在罐体1的罐壁上，且进料转轴7一端伸出罐壁与进料电机10连接；循环输送皮带3另一端下方设置有出料绞龙8，出料绞龙8包括上部开口的U型槽8.1，U型槽8.1槽壁内设置有冷水夹层8.2，U型槽8.1内设置绞龙轴8.3，绞龙轴8.3设置伸出U型槽8.1连接有搅拌电机8.4。
罐体1上表面开设有3个真空抽气口9；罐体1两端分别设置有检修门1.1。
利用上述微波加热多层真空带式干燥机对玉米浆干燥和灭菌的方法，包括以下步骤：
1.首先干燥机密闭，真空泵通过真气抽气口10进行抽真空；
2.当干燥机达到要求的真空度后，浓缩的玉米浆经过一个进料喷头均匀涂在循环输送皮带2上进入首部微波抑制区4.a，同时调节产量和控制水分；循环输送皮带2在输送滚筒3的牵引下在微波加热区4.b穿过，其中，玉米浆浓缩的浓度≥50％；
3.物料干燥后进入尾部微波抑制区4.c，循环输送皮带2在输送滚筒3的牵引下在尾部微波抑制区4.c冷却，物料冷却变脆，在循环输送皮带2的末端物料剥离掉入料槽出料蛟龙8的U型槽8.1，通过出料蛟龙8送出干燥机，在干燥的同时，起到杀菌作用。
其它未详细说明的部分均为现有技术。尽管上述实施例对本发明做出了详尽的描述，但它仅仅是本发明一部分实施例，而不是全部实施例，人们还可以根据本实施例在不经创造性前提下获得其他实施例，这些实施例都属于本发明保护范围。

Claims (7)

  1. 一种多层微波加热和灭菌的真空带式干燥机，其特征在于：它包括罐体(1)，所述罐体(1)内由上至下间隔设置有多排相互平行且水平的循环输送皮带(2)，所述循环输送皮带(2)两端均设置有输送滚筒(3)，所述输送滚筒(3)之间的循环输送皮带(2)上装置有微波加热灭菌装置(4)，所述循环输送皮带(2)一端至另一端的微波加热灭菌装置(4)依次分为首部微波抑制区(4.a)，微波加热区(4.b)和尾部微波抑制区(4.c)，所述微波加热灭菌装置(4)包括设置在循环输送皮带(2)外的微波作用腔室(4.1)，所述微波作用腔室(4.1)内，首部微波抑制区(4.a)中循环输送皮带(2)下方设置有物料加热板(4.2)，尾部微波抑制区(4.c)中循环输送皮带(2)下方设置有物料冷却板(4.3)；所述微波加热区(4.b)的微波作用腔室(4.1)上表面设置有平板(4.11)，所述平板(4.11)水平间隔设置有多排微波组件(4.4)，所述循环输送皮带(2)一端的输送滚筒(3)通过固定轴(5)固定在罐体(1)壁上，所述循环输送皮带(2)一端上方对应设置有进料喷头(6)，所述进料喷头(6)中部设置在进料转轴(7)上，所述进料喷头(6)另一端通过进料软管(6.1)与罐体外的进料泵(6.2)连接，所述进料转轴(7)两端固定在罐体(1)的罐壁上，且进料转轴(7)一端伸出罐壁与进料电机(10)连接；所述循环输送皮带(3)另一端下方设置有出料绞龙(8)，所述罐体(1)上表面开设有一个或多个真空抽气口(9)。
  2. 根据权利要求1所述多层微波加热和灭菌的真空带式干燥机，其特征在于：所述平板(4.11)上设置有2～5微波组件(4.4)，每排微波组件(4.4)由2～30个微波元件组成。
  3. 根据权利要求1所述多层微波加热和灭菌的真空带式干燥机，其特征在于：所述微波加热区(4.b)的循环输送皮带(2)下方设置有皮带托辊(2.1)。
  4. 根据权利要求1所述多层微波加热和灭菌的真空带式干燥机，其特征在于：所述出料绞龙(8)包括上部开口的U型槽(8.1)，所述U型槽(8.1)槽壁内设置有冷水夹层(8.2)，所述U型槽(8.1)内设置绞龙轴(8.3)，所述绞龙轴(8.3)设置伸出U型槽(8.1)连接有搅拌电机(8.4)。
  5. 根据权利要求1所述多层微波加热和灭菌的真空带式干燥机，其特征在于：所述罐体(1)两端分别设置有检修门(1.1)。
  6. 根据权利要求(1)所述多层微波加热和灭菌的真空带式干燥机，其特征在于：所述循环输送皮带(3)为2～10排。
  7. 一种利用多层微波加热和灭菌的真空带式干燥机对玉米浆的干燥和灭菌方法，其特征在于：包括以下步骤：
    1)首先干燥机密闭，真空泵通过真气抽气口(10)进行抽真空；
    2)当干燥机达到要求的真空度后，浓缩的玉米浆经过一个进料喷头均匀涂在循环输送皮带(2)上进入首部微波抑制区(4.a)，同时调节产量和控制水分；循环输送皮带(2)在输送滚筒(3)的牵引下在微波加热区(4.b)穿过，其中，玉米浆浓缩的浓度≥50％；
    3)物料干燥后进入尾部微波抑制区(4.c)，循环输送皮带(2)在输送滚筒(3)的牵引下在尾部微波抑制区(4.c)冷却，物料冷却变脆，在循环输送皮带(2)的末端物料剥离掉入料槽出料蛟龙(8)的U型槽(8.1)，通过出料蛟龙(8)送出干燥机。
PCT/CN2019/122679 2018-12-12 2019-12-03 多层微波加热和灭菌的真空带式干燥机及其玉米浆的干燥和灭菌的方法 WO2020119521A1 (zh)

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