Marine screw-type liquid nitrogen freezing equipment

Abstract

The invention provides marine screw-type liquid nitrogen freezing equipment and belongs to the technical field of machinery. The marine screw-type liquid nitrogen freezing equipment comprises a freezing chamber, a pillar and a conveyer belt mesh, an inner cavity is arranged in the pillar, the pillar includes a pre-freezing section located at the upper end and a freezing section located at the lower end, a plurality liquid nitrogen sprayers are arranged on the freezing section along the conveyer belt mesh, nozzles of the liquid nitrogen sprayers are opposite to the conveyor belt mesh, a screw-type slot communicated with the inner cavity is arranged in the pre-freezing section, the screw-type slot is opposite to the upper side face of the conveyer belt mesh on the pre-freezing section, a connecting hole is arranged in the bottom of the pillar, one end of the connecting hole is communicated with the lower end of the inner cavity while the other end is communicated with the outer wall of the pillar, a fan chamber is arranged on the outer wall of the freezing chamber, a fan is arranged in the fan chamber, the air outlet of the fan is communicated with the connecting hole through a connecting pipe, and the air inlet of the fan is communicated with the bottom of the freezing chamber through an air inlet pipe. The screw-type liquid nitrogen freezing equipment has the advantages that consumption of liquid nitrogen can be reduced by fully utilizing cold energy of low-temperature nitrogen, the utilization rate of the cold energy of the liquid nitrogen is increased and the like.

Description

technical field [0001] The invention belongs to the technical field of machinery, and relates to a ship-used spiral liquid nitrogen freezing device. Background technique [0002] At present, the freezing of aquatic products generally includes two types of methods: cold storage and freezing preservation. Among them, freezing preservation mainly involves quick freezing of fresh aquatic products through freezing equipment. The traditional quick-freezing machine freezes for a long time, and the ice crystals of aquatic products have a large area, resulting in low freshness of aquatic products. Liquid nitrogen freezing equipment, because it can quickly freeze aquatic products, has a small ice crystal formation area, prevents the damage of the cell wall of aquatic products, has no dry consumption, and better maintains the freshness and flavor of aquatic products, making it the superiority in the current freezing of aquatic products. equipment. [0003] The current liquid nitrogen...

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Problems solved by technology

[0004] The purpose of the invention is to solve the above problems in the existing technology, and propose a marine spiral liquid nitrogen freezing equipment. The technical problem to be solved by the invention is: how to reduce the consumption of liquid nitrogen, reduce the cost of freezing aquatic products and improve the overall freezing of aquatic products. Efficiency and Freezing Quality

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