Microwave puffed starch material drying test instances
    Test results can be seen from the following . The shape and size of starch feedstocks , microwave heating and heat transfer medium and use it or not, puffed dried products on time and foam color foam shapes, and puffing rate. Which the heat transfer medium with microwave heating of both heating and puffing with the best results.
    Test ingredients , ratio, and a top handle as follows:
    Ingredients: Potato starch 22.2 kg , 7.8 kg of starch reference Heights , salt 0.75 kg , 1.2 kg sugar , dry guar gum 0.3 g, glycerol 150 ml , blending 80 ℃ hot water 18 liters .
    Mixing the above ingredients show thin , with 95 ℃ temperature cooking 20 to 30 minutes to make it fully oriented . Then take the heat repeatedly kneading placed stainless steel plate, o ℃ temperature refrigerated 12 hours to cure . Cutting then identified for a sheet thickness of 3 mm , with its three equal weight , were cut into 3 * 2 * 2 mm, 3 * 6 * 20 mm and 3 * 10 * 30 mm bar . These bars with 50 ℃ hot air pre-drying, so that their moisture content reduced to 18% of the string , and then sealed storage to internal water balance. The sample was 10.8 kg spare .
    Selection of particle size 2-3 mm salt as heat transfer medium , the use amount of salt material and being expanded volume ratio is 10:1 .
    Finally, the quality of materials and media puffing into the microwave heating device . The output power of microwave heating device 2.5Kw. Frequency 2450ME, with automatic temperature adjustment control . Extruded material is 80 to make a 12 ℃ temperature . Ensure the efficiency of its bubble .
    For the three test materials, then transfer medium by changing the temperature , alone or in combination with the micro Han heating method to change the time to test a variety of microwave heating puffing effect .
  Above毫米3 × 2 × 2 , 3 × 6 × 20毫米, 3 × 10 × 30 mm test material, the moisture rate of 18 % of the size after the pre- drying were 2 × 1.3 × 1.3 meters high , 2 × 4 × 15 rice and 2 × 7 × 22 mm , etc. the same reference numerals in the sample is divided into three , each set to 3.6 kg , respectively, for different media fluid temperature , the heating method and the heating period of testing .