Shelf-type quick-freezing device for sea catches

Abstract

The invention discloses a shelf-type quick-freezing device for fish catches of a sea fishing vessel, which comprises a shelf, a main pipe for inlet liquid of antifreeze, a main pipe for outlet liquid of antifreeze, and several hollow quick-freezing flat plates. Pipe and liquid return pipe, the liquid distribution pipe is connected with the antifreeze liquid inlet main pipe, the liquid return pipe is connected with the antifreeze liquid outlet main pipe, and several partitions are arranged at intervals along the width direction in the quick-freezing plate, and the partitions will separate the inside of the quick-freezing plate. The space is divided into multiple independent antifreeze flow channels. The two ends of the antifreeze flow channel are respectively connected to the liquid distribution pipe and the liquid return pipe through the antifreeze liquid inlet and antifreeze outlet. A number of baffle units are arranged at intervals in the length direction, and the space between adjacent baffle units forms a flow-disturbance area, and at least two flow-disturbance balls are arranged in the flow-disturbance area. The invention has the advantages of compact structure, large heat transfer coefficient, good heat exchange effect, low requirements on the liquid supply flow rate of the freezing liquid, fast freezing and quick freezing, and is very suitable for quick freezing of catches on sea fishing ships.

Description

technical field [0001] The invention relates to a ship-mounted quick-freezing device, in particular to a shelf-type quick-freezing device for catches on a sea fishing vessel. Background technique [0002] In pelagic fisheries, in order to ensure the quality of the catch as much as possible, the catch must be quickly sorted, frozen, stored and transported below -18°C after being caught on board. At present, the devices used for quick-freezing fish catches on sea fishing vessels mainly include semi-air-supply and semi-contact quick-freezing devices, strong-ventilated quick-freezing devices and contact-type quick-freezing devices (flat-plate quick-freezing cabinets), among which strong-ventilated quick-freezing devices can be divided into pallet type (Shelf type) quick-freezing device, tunnel-type quick-freezing device and rotary conveyor belt quick-freezing device. Because the pallet type (shelf type) quick-freezing device is relatively simple in structure, easy to operate, a...

AI Technical Summary

Problems solved by technology

This liquid plate quick-freezing device has the following defects: (1) the liquid plate quick-freezing device is provided with a plurality of serpentine passages in the plate, and the antifreeze enters the middle part of multiple liquid supply pipes from the liquid supply main pipe at the same time. Accelerating the freezing speed requires a high flow rate of the cooling liquid, resulting in a large amount of cooling liquid used, which is not conducive to energy saving; (2) The antifreezing liquid is in a laminar flow state when it flows in the serpentine channel (the antifreezing liquid is stratified in parallel flow, mutual non-interference and mixing), the antifreeze at the center of the serpentine channel cannot fully mix with the antifreeze at the edges on both sides, resulting in the inconsistency between the antifreeze at the center of the serpentine channel and the edges on both sides There is a temperature difference between the freezing liquid (cold and hot unevenness), the heat transfer effect is poor, and the utilization efficiency of the cooling capacity of the antifreezing liquid is low; (3) the heat transfer coefficient of the plate is small, and the freezing speed can be further improved

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