Views: 6 Author: Site Editor Publish Time: 2021-09-18 Origin: Site
Pineapple scientific name pineapple, also known as yellow pear, pear, dew pocket, poo suo etc.. Pineapple is a tropical plant, native to South America. There are also records for about the end of the 18th century, the Portuguese missionaries in China for the first time to pineapple seeds, scattered on the land of Macao in China. By the 1870s, the United States accounted for more than 70 percent of the world's supply of fresh pineapples and juices. Thailand is now the leading producer of pineapples in Asia. Guangdong huangdeng pineapple is the most famous. It is a new variety with Lingnan characteristics. It is not only thick and big, but also sweet as honey and fragrant as flowers.
Pineapple drying process is relatively simple but need to use special drying equipment. At present, the ideal drying equipment, and often used by customers is the air energy heat pump fruit dryer, this dryer has the characteristics of high efficiency and energy saving, green environmental protection, accurate and intelligent, used to dry pineapple, the most appropriate.
Application of heat pump drying technology with the continuous expansion of industrial production scale, the traditional drying efficiency and high cost drying method cannot meet the existing demand more and more. Heat pump as a new, energy-saving new technology. To a large extent, it solves the problem of slow efficiency and high cost of traditional drying. Under the background of slow drying efficiency and high drying cost, under the condition of drying temperature below 75 degrees, the choice of heat pump drying will be a direction of the enterprise. At present, heat pump drying has been gradually applied in many industries.
Process of making dried pineapple by fruit drying machine supplier’s dryer
1.Raw material treatment: Take eight mature pineapples, remove rotten fruit, diseased fruit and insect fruit, remove the skin, remove the heart and remove the fruit eye, select the pulp has turned yellow, with pineapple fragrance, slice, size of each piece thickness of 3-4 mm, fan shaped.
2.Hardening, color protection measures: pineapple flesh is a juicy berry type, the purpose of ash is to make the pectin substance and calcium combined into insoluble calcium pectin salt, so that the loose and easy to cook the flesh into a little hard to cook, and at the same time to neutralize the acid contained in the flesh. The lime dipping method is to soak pineapple slices in the supernatant of 3% lime water after stirring and precipitation for 8 hours, then rinse them with water and let them drain water.
3.Concentrated sugar solution treatment: 60% sucrose solution is prepared, that is, 60 kg sugar and 40 kg water are composed of 100 kg sugar solution. Soak pineapple slices in 60% sugar for 24 hours as soon as the sugar has soaked the ingredients.
4.Drying by fruit drying machine supplier’s dryer: remove pineapple slices from the sugar, drain the water, dry at 65℃ for 18-20 hours, so that the water content reaches 16% is the standard.
5.Packaging: dried pineapple slices or pineapple slices directly contact with the air will damp, so it needs to be sealed packaging, if conditions can be vacuum packaging, so as to maximize the preservation of the color and flavor of pineapple slices or pineapple slices.
Pineapple dried by fruit drying machine supplier’s dryer reference process:
The drying process of pineapple can be divided into four stages:
The first stage: the baking temperature is set at 55℃, the continuous heating mode, and the circulating fan continues to work for 2 hours;
The second stage: temperature 60℃, humidity set 35%, mode choose drying + dehumidification, time 8 hours;
The third stage: the temperature is raised to 65℃, the humidity is set at 20%, the mode is drying + dehumidification, the baking duration is 8 hours, the whole process is dry and wet bulb sensor signal control humidity, temperature probe sensor signal control temperature;
The fourth stage: the temperature is set at 50℃, the humidity is set at 18%, the continuous dehumidification mode is baked for about 1.5 hours, and the drying is completed.
Matters needing attention:
1) 60% concentrated sugar solution after processing pineapple slices, the concentration will decrease, but there is pineapple aroma, can be used as pineapple juice, or add sugar to improve the concentration of continued use.
2) The pre drying of pineapple slices can control the temperature a little higher, which is conducive to dehumidification. Later with the increase of sugar content, the temperature needs to be lowered for baking.