The frozen okra refers to the fresh okra which is processed under frozen vegetable method.
Frozen vegetable is a kind of frozen food. It is a small packaged food made of Fresh Vegetables such as pepper, tomato, beans and Cucumber after processing and frozen at the lowest temperature as soon as possible.
Production technology of Frozen Vegetables:
Raw material washing → primary sterilization → slicing → secondary sterilization → dehydration → quick freezing → packaging → refrigeration
Frozen vegetables are not just a single dish, but many kinds with mixed a variety of dishes. By matching with a variety of mixed dishes, they have reasonable nutritional value,can provide more comprehensive vitamins.
The frozen vegetable is including many different kinds of vegetables, for example, bell pepper, tomato, potato, beans (soybean pod, salted soybean, shelled soybean, greaan beans, green peas and so on), green asparagus, garlic sprout, pumkin, okra, corns, peanut, lotus slice and many more.
As we know, the vegetable contains lots of vitamins and fibres, minerals and nutrients that is good and healthy for our body and daily life.
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Convection Drying For non-hygroscopic materials, use hot air to catch and even dry. A fan is used to absorb the air in the environment and heat it to the temperature required to dry the particular material. The heated air passes through the drying hopper and convectively heats the material to remove moisture.
The drying of the hygroscopic material is generally divided into three drying sections: * one drying section evaporates the moisture on the surface of the material; the second drying section focuses the evaporation inside the material, and the drying speed is slowly lowered. The temperature of the material to be dried begins to rise; at a stage after the Zui, the material reaches a moisture absorption equilibrium with the dry gas.
A vacuum drying vacuum drying apparatus consisting of three chambers mounted on a rotating conveyor. At the *cavity, when the colloidal particles are filled, a gas heated to a drying temperature is introduced to heat the colloidal particles. At the gas outlet, when the material reaches the drying temperature, it is moved to the second chamber which is evacuated. Since the vacuum lowers the boiling point of the water, the water is more likely to become vaporized and the water diffusion process is accelerated. Due to the presence of a vacuum, a greater pressure differential is created between the interior of the colloid and the surrounding air.
Another method of infrared drying of dried colloidal particles is an infrared drying process. In convection heating, the thermal conductivity between the gas and the colloidal particles, between the colloidal particles and the colloidal particles, and inside the colloidal particles are very low, so the heat transfer is greatly limited. In the case of infrared drying, since the molecules are irradiated by infrared rays, the absorbed energy is directly converted into thermal vibration, which means that the heating of the material is faster than in convection drying. In addition to the convective heating, in addition to the local pressure difference of ambient air and moisture in the colloidal particles, infrared drying also has a reverse temperature gradient. Generally, the greater the temperature difference between the drying gas and the heated particles, the faster the drying process. The infrared drying time is usually from 5 min to 15 min.
Infrared drying and vacuum drying are new technologies in plastics processing. The application of these new technologies has greatly shortened material residence time and reduced energy consumption. However, the innovative drying process is also relatively expensive. Therefore, in recent years, efforts have also been made to improve the efficiency of drying conventional dehumidification gases.
Proper use of drying technology using dryer
A mechanical device that uses heat to reduce the moisture of a material and is used to dry an object. The dryer vaporizes the moisture (usually referred to as moisture or other volatile liquid components) in the material by heating to obtain a solid material having a specified moisture content. Proper use of drying technology is of great significance for cost savings and energy consumption reduction. The dried material is usually divided into two types, hygroscopic and non-hygroscopic. Identifying the boring drying performance is the key to selecting the drying technology.