A kind of swimming crab liquid nitrogen quick freezing equipment

Abstract

The invention discloses liquid nitrogen quick-freezing equipment for swimming crabs, which comprises a box body, a feeding conveying mechanism and a material discharging conveying mechanism. The two ends of the box body are provided with a material inlet and a material outlet. Partition plate, feed transmission mechanism includes active feed roller, passive feed roller, front guide roller, lower guide roller and rear guide roller, passive feed roller and passive feed roller are wound with feed conveyor belt, feed conveyor The belt goes down through the front guide roller and bypasses the lower guide roller, and then winds out through the rear guide roller to form a concave part. The discharge transmission mechanism includes a passive discharge roller and an active discharge roller. There is a discharge conveyor belt, and both the discharge conveyor belt and the feed conveyor belt move clockwise. The outer end of the feed conveyor belt is equipped with a turning mechanism, which is located above the feed conveyor belt and the discharge conveyor belt in the freezing chamber. All are equipped with liquid nitrogen spray mechanism. The invention has fast freezing and quick freezing, can improve the overall freezing efficiency and freezing quality of swimming crabs, and can reduce the consumption of liquid nitrogen.

Description

technical field [0001] The invention relates to the technical field of liquid nitrogen quick-freezing, in particular to a liquid nitrogen quick-freezing equipment for swimming crabs. Background technique [0002] Swimming crab meat is tender and tender, delicious, high in protein content, rich in essential fatty acids and vitamins A and D, and is loved by Chinese people. It is also one of the main aquatic products that my country exports to earn foreign exchange. Swimming crabs are regarded as an important aquatic resource in China, but because their muscles are rich in protein, fat and various minerals, they are easily spoiled after death, and crab meat will also experience muscle "gelatinization". In order to reduce the quality deterioration of swimming crabs and inhibit the gelatinization of muscle fibers, low-temperature freezing storage methods are usually adopted. The commonly used methods for cryogenic freezing of swimming crabs include plate quick freezing, freezer ...

AI Technical Summary

Problems solved by technology

This liquid nitrogen freezing tunnel machine has the following defects: (1) The spraying device is located above the conveyor belt, and the sprayed liquid nitrogen can only contact the swimming crabs on the conveyor belt on one side, and the freezing of the swimming crabs on the contacting side of the conveyor belt will be affected. Uneven freezing occurs, which affects the quality and efficiency of freezing; (2) A large amount of liquid nitrogen will remain after spraying with the liquid nitrogen nozzle, and the amount of liquid nitrogen used is large; (3) Liquid nitrogen is evaporated into low-temperature nitrogen directly from the feeding end of the equipment And the discharge end escaped, and the low-temperature nitrogen was not reused, and the low-temperature nitrogen escaped from this part caused a lot of waste of the remaining cooling capacity

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