Prawns are refrigerated 1 to 2 hours after fishing.Convenient transportation, until the reprocessing when the thaw.
Mr. Du runs a shrimp processing plant in nantong. Before thawing the prawns with the traditional normal pressure cold water (4 ℃), the prawns were thawed at the low temperature of 2 ~ 6 ℃, and the temperature fluctuated around 4 ℃.By changing the density of water, promoting the migration of water and increasing the thawing rate. The advantages of this technology are less weight loss, but the disadvantages are that the defrosted meat is easily contaminated by microorganisms in the water, the soluble substances in the meat are lost, and the meat is easy to expand after absorbing water, which affects the quality of the defrosted meat, and the defrosting speed is slow, which is not conducive to improving the yield.
Microwave Thawing Successful Case of Prawns
Prawns
Frozen prawns -18℃, 5kg per carton, using 915MHZ microwave defrosting equipment, adjust the filament to 1/3, adjust the magnetic field to 1/2, and adjust the transmission to 10HZ. The microwave effect lasts for 5 minutes. The observation results show that the shrimp body is complete and complete, with a full shape and good color, and there is no ice adhesion between individuals. The temperature measured by inserting a needle thermometer into the center is -4℃, and the customer requires the defrosting temperature to reach -2℃. However, considering that there will be a period of normal temperature storage time between defrosting and peeling, the defrosting temperature is too high and the ooze has been completely melted before peeling, resulting in pollution and loss, the customer praises this idea after communication.
A 25kw microwave defrosting equipment was customized for the customer. According to 5kg per box, more than 160 boxes could be defrosted in one hour. Transmission devices were equipped before and after the machine. Automatic transmission is realized from the cold storage to the processing workshop, and the equipment runs automatically after starting up, greatly improving the efficiency and saving at least 2 people’s labor. Temperature can be precisely controlled to ensure the quality of thawed products.
microwave defrosting equipment
Advantages of microwave equipment：
1、Fully automatic PLC control equipment, stable operation, safe and reliable, automatic fault detection, processing, alarm, can be integrated into production line, reduce labor costs;
2、The equipment uses the full digital frequency conversion microwave power source, the energy efficiency is higher than the traditional transformer microwave source.Lower operating costs;
3、The equipment can realize drying, expanding and sterilization at the same time, improve production efficiency, save equipment cost, site space, operation process, suitable for all types of processing plants, is the only choice of intelligent factory;
4、Beautiful appearance of equipment, no emission of pollutants, improve corporate image.
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