Liquid air quick-freezing system for deep-sea fishing

Abstract

The invention provides a liquid air quick-freezing system for deep-sea fishing. An air outlet of an air compressor is communicated to the pressurizing end through a second pipeline, part of to-be-liquified air exhausted out of an air outlet of the pressurizing end penetrates a main heat exchanger to enter a second gas and liquid separator to be subject to flash evaporation, liquified air and residual gas are obtained through flash evaporation, the obtained liquified air enters a quick-freezing unit, the other part of to-be-liquified air is drawn out of the middle of the main heat exchanger to expand, and expansion gas is obtained; the residual gas obtained after flash evaporation and the expansion gas penetrate the main heat exchanger to enter a fourth pipeline through pipelines, the residual gas obtained after flash evaporation and the expansion gas exchange heat with the to-be-liquified air in the main heat exchanger, and the fourth pipeline communicates into an air inlet of the air compressor. According to the system, the cold storage amount is large, after 90% or above of purified air is subject to quick freezing, the air can return to the air inlet of the air compressor through a closed cycle, and therefore only a small part of raw material air needs to be supplemented from atmosphere, the temperature of a cold source is wholly reduced, and the energy saving and consumption reduction effect is obvious.

Description

technical field [0001] The invention belongs to the technical field of fish preservation, and in particular relates to the preservation of fish in a mobile working tool at sea, in particular to a liquid-air quick-freezing system for ocean-going fishing. Background technique [0002] With the continuous improvement of people's living standards, people pay more attention to the importance of a reasonable dietary structure to their health. The rich and diverse marine aquatic products are delicious in quality, unique in flavor and have the characteristics of high protein and low fat, which greatly enrich people's intake of animal protein and are favored by consumers. my country has developed into the world's largest consumer of seafood . However, due to the pollution of the marine environment and human overfishing, the offshore fishery resources have been severely damaged and depleted, which has led to the rapid development of my country's pelagic fishery. [0003] The freshnes...

AI Technical Summary

Problems solved by technology

[0004] Most of the traditional refrigerated fresh-keeping methods use crushed ice for fresh-keeping. Now there are also studies using adsorption waste heat refrigerators, cold dryers, fluidized ice and other quick-freezing methods. These methods all have some unsolvable problems: First, the freezing temperature is too high The second is that the cooling capacity is not concentrated, which cannot meet the short-term large-scale quick-freezing after the trawling of the boat when the fish season is booming

Images