Dehydrated vegetables
Taizhou Hongxin Food Co., Ltd.
Processing tomato powder
Posted: 2012-3-7 changes: 2012-3-7 Click: 499

Fresh tomatoes processed into tomato powder, can greatly enhance its value-added, but also the lowest perishable problem, a good way to solve tomato season. A choice of raw materials. First with fresh, ripe, bright red color, no pests and diseases of tomatoes as a raw material. Second, the thermal fragmentation. Hot broken tomatoes broken immediately heated to 85 ° C treatment. Third, the beating. In order to remove the tomato skin and seeds, the use of dual-channel beater for beating. The first beater sieve pore size of 0.8-1.0 cm, mesh aperture of the second beater 0.4-0.6 cm. Beater rotational speed generally is 800-1200 r / min. Beating from the amount of bran should normally be controlled at 4% -5%. Fourth, concentrated under vacuum. Concentrated concentrated under vacuum and atmospheric enrichment. Concentrated at atmospheric pressure due to enrichment of the high temperature will lead to the color of the tomato pulp, flavor loss, poor product quality, and therefore are generally concentrated under vacuum. Temperature vacuum concentration is only about 50 ℃, the degree of vacuum of 670 mm Hg or more. Fifth, dry. Tomato concentrates in general the use of spray drying and foam drying method. A spray drying method. First tomato concentrate slurry before spray drying, to be homogenized. The homogenization pressure of 150-200 kg / square cm. Generally use the tower wall with centrifugal or two-fluid cooling jacket or spray dryers to dry. If the heating medium is pre-dehumidification dry air, dry air inlet temperature is generally about 150-160 ° C, outlet temperature 77-85 ° C, the feed concentration is generally 20% -30%. 2, foam drying method. The key to this drying method by adding a foaming material like soy protein, globulin, fatty acid ester, sugar esters and glycerol monostearate, etc. to form a stable foam in the tomato concentrate. Gas temperature inside the dryer is about 93 ° C, the rate of about 100-130 m / sec, to join in a countercurrent manner. Drying time depends on the characteristics of the product and the drying conditions used by the general drying time of 15-18 minutes.