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Freeze-Dried Food Processing

 Freeze-Dried Food Processing is a high and new technology for vegetables, fruits, meat etc. referred to as “freeze-dried food”. In Europe, America, Japan and other developed countries, this technology is developing about two hundred or thirty years. At present this technology has made great progress. Freeze-dried food are very popular in Europe, America, Japan at present, drying food has the proportion of 40% in the United States, Japan. freeze-dried food is high quality green food which use modern dehydration technology and craft processing a set of convenient, health care, natural, avoid the traditional dehydration technology brought the discoloration, metamorphism, variable ignorance, component loss and unable to restore and maintain the original defects, with the shape, color and taste the same, after water is good, without any loss, quality light, temperature shipping pin etc. Therefore, freeze-dried food in the international market price is 4 ~ 6 times than hot air drying food, is 7 ~ 8 times than frozen food price, is becoming international trade major food. Shandong province in China, such as coastal areas a few food manufacturers to small batch production, processing of freeze-dried shallot, garlic, dried beef, mushrooms, and aquatic products, etc., are as Japan, Europe and the United States super market popular products.

The development of freeze-dried food in China has just started, according to the ministry of machine building schedule, our country science and technology workers successfully developed the vacuum freeze drying equipment, equipment dehydration thoroughly, can remove material of 95% ~ 98% of moisture. With garlic slice as an example, moisture content is only 2.3% ~ 3.5%, in line with the United States make 6.7% of the dehydration standard. The indicators of equipment in accordance with the business technology standards, to various technical and economic indicators. All equipment and food contact areas, adopted the non-toxic harmless material, accord with (the food hygiene law of the People's Republic of China) requirements. freeze-dried food is a new technology, new things, not for most people know, so has not caused universal enough attention, we brief introduction is as follows, for the manufacturers and food drying food development as a reference.

(1) Freeze-dried food basic principle. In vacuum condition, using the sublimation principle, the advance of the frozen water in the material without the melting of the ice directly on ice state for water vapor distillation was removed to make the material drying. Food dehydration. Generally USES two ways, one is heating evaporation (i.e. thermal drying), another kind is freeze sublimation. Freeze-dried food is using vacuum frozen sublimation dehydration method water under different pressure and temperature, can appear solid, liquid and gas, the liquid to gas, it is called "sublimation". Sublimation must have certain conditions, the pure water for, this condition is roughly: pressure less than 600 pa, the temperature is below zero degrees Celsius. Food contains is not the pure water, the sublimation of pressure and temperature are mostly reduced. And then dress food container exhaust, the food of the ice can sublimate for steam and emerge, thus obtains the freeze-dried food.

(2) The characteristics of the freeze-dried food. Freeze-dried food has many unique advantages. Ensure food protein, vitamins, etc. Various kinds of nutrients, especially those volatile components not heat loss, so best to keep food color, aroma, ignorance; Using this technology, the dry low temperature, vacuum, no liquid transformation, Lyophilized products ChengHaiMian form, will be free from shrinkage, so after water is wonderful, edible convenience; Lyophilized products including water little, the appropriate packaging can be cold storage and transportation. After dehydration by dry weight. Convenient transportation, operation cost is low, so a good benefit.

(3) The function of vacuum freezing drying equipment. Equipment for processing a variety of food, vegetables, mushroom, asparagus, parsley, celery, cabbage, pepper, cauliflower, green peas, chives, garlic slice, ginger and carrot b, etc. Fruits: litchi, longan, banana, orange, strawberry, peach, cherry and plum, etc. Meat, fish, shrimp, snake meat, fruit in xinjiang, turtle, beef, pork and ham, etc. Instant noodles food: bowl young face, panel mounting plain food, baby food, tourism food, old food, military food and space food and so on. Flavor types: soup, jam, porridge bedding material and spices, etc. Other dung: Finn leaf, Chinese herbal medicine, ginseng, animal glue white and enzyme element, etc.

(4) Freeze-dried food production process. freeze-dried food production line, mainly by dry warehouse, capture water warehouse, precooling tank, heating system, vacuum system, transmission system and computer measurement and control system of seven parts constitute. Even before the matching between treatment, frozen, cold source and packaging equipment, and steam boiler, water, electricity system, etc. Mainly used in vegetables, fruits, meat, aquatic products, medicine and seasoning lyophilized preservation. Its working principle is to after pretreatment precool food, put people in dry warehouse, in low temperature vacuum conditions, and heating drying plate radiate heat supply food, water in the food directly by the ice into water vapor distillation. The water vapor distillation constantly, the vacuum pump suction to capture water warehouse inside, in a forty - 45 ℃ row tube outer wall condensation is capture, until the lyophilization curve according to meet the prescribed requirements, and stop heating and vacuum, complete food lyophilization process, skip along the day rail had treatment room charge of frozen library frozen and dry warehouse sublimation, dry dehydration to packing room discharge.Inspecting products finishing, it is the main way to export. Along with the international market freeze-dried food demand increasing, our country the thing north and south the region development and production of freeze-dried vegetables, fruit, dried beef and seafood, such as bulk food or local famous specialty lyophilized export, product added value is high, the prospect is good, profit too little risk. In the domestic market, as people on food quality, convenience and nutrition health care function asks is ceaseless rise, freeze-dried food will more and more get the welcome of people, in catering, tourism, food and medicinal materials processing, will have a great revenue.

China Quality Frozen Vegetables&Fruits supplier,Bean Distributor,Canned&Fresh foods Wholesaler or OEM Service factory-Hangzhou Comtrue Trading Co.,Ltd.

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