Fishing boat tail gas refrigerating unit

Abstract

The invention discloses a fishing boat tail gas refrigerating unit, which adopts the principle of ammonia-water absorption refrigeration and uses the waste heat of fishing boat tail gas to drive a system to work so as to finally realize a refrigeration process. The refrigerating unit realizes low temperature, high efficiency and high power. The system mainly comprises a generating and rectifying device, a condenser, an ammonia throttle valve, a liquid storage tank, an evaporator, an absorber, a solution pump, a solution throttle valve, a solution heat exchanger and the like. Aqueous solution of ammonia is heated at a generating part of the generating and rectifying device to evaporate a large amount of ammonia vapor and a small amount of water vapor, the water vapor is rectified at a rectifying part of the generating and rectifying device, the rest ammonia vapor is condensed in the condenser to form liquid ammonia, the liquid ammonia is throttled and decompressed by the throttle valve and then enters the liquid storage tank, and the liquid ammonia is evaporated and refrigerated in the evaporator to provide cold energy for fresh keeping for a fishing boat. The refrigerating unit reduces the ice load of the fishing boat, effectively improves the freshness of fishes, and has significance for realizing energy conservation and emission reduction on the fishing boat.

Description

technical field [0001] The invention belongs to the field of waste heat utilization of fishing boat tail gas, in particular to a fishing boat tail gas refrigeration unit. Background technique [0002] The diesel engine power of fishing boats in my country is basically 130-450kw. Most of the boats do not have special refrigeration equipment and fish processing devices, and most of them carry a large amount of ice for freezing and preservation. Fishing boats have to bring fuel oil, fresh water, and ice to go out to sea, which is time-consuming and laborious, which reduces the effective utilization of the boat and makes it difficult to go out to sea. The adsorption refrigeration for exhaust gas refrigeration has long heating time, large volume, large temperature fluctuations, low COP value, and slow refrigeration speed. [0003] The existing fishing boat tail gas refrigeration device includes a generator, a check valve, a condenser, a liquid storage tank, a throttle valve, an ...

AI Technical Summary

Problems solved by technology

Therefore, the heat loss is large, the efficiency is low, the refrigeration is not stable, and the check valve, solenoid valve, etc. work alternately, causing many failures and a large amount of maintenance.

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