Ship fresh water tank anti-freezing system

Abstract

The invention discloses a ship fresh water tank anti-freezing system which comprises a heat exchanger arranged outside a fresh water tank. A first daily fresh water pump is arranged between the freshwater tank and the heat exchanger; a water outlet of the fresh water tank is connected with the first daily fresh water pump; the first daily fresh water pump is connected with a water inlet of the heat exchanger; a water outlet of the heat exchanger is connected with a water inlet of the fresh water tank. The ship fresh water tank anti-freezing system is easy to refit and low in implementation cost, reduces the construction cost and saves construction working hours; welding in the tank is omitted, and thus damage to a coating of the fresh water tank is avoided; power required for heating is reduced, and thus heat source consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of ships, in particular to an antifreeze system for a fresh water tank of a ship. Background technique [0002] Ships sailing in ice areas need to apply for ice reinforcement symbols. The classification society requires ships with ice reinforcement symbols to be provided with antifreeze measures for the fresh water tanks whose top is higher than the waterline and adjacent to the outer plate. [0003] The commonly used antifreeze measures for fresh water tanks are as follows: [0004] 1. Introduce compressed air into the cabin to blow bubbles to disturb the water in the cabin. A compressed air pipe is arranged at the bottom of the cabin, and a hole with a diameter of about 3mm is arranged on the pipe every 2-3m. Air bubbles are generated by passing compressed air through the cabin tube. Through the process of bubbles rising from the bilge to the water surface in the tank, the water in the tank is disturbed...

AI Technical Summary

Problems solved by technology

[0005] Its disadvantages are: ①The compressed air is mixed with a small amount of oil gas and impurities, which will pollute the water quality

②The effect of heating and heat preservation is not obvious, so it is not suitable for extremely cold areas

[0007] The disadvantages are: ① In order to prevent the coils from rusting and polluting the water quality, the heating coils in the fresh water tank are generally made of stainless steel or copper, the construction cost is high, and corrosion and rust will still occur after a long time

②Personnel need to enter the fresh water tank to lay the coil, the working space is narrow, the working environment is harsh, and the construction is difficult

③It is easy to damage the epoxy coating in the fresh water tank during the welding operation of the coil pipe bracket

④Heating the entire water tank, high energy consumption

⑤The heating coil needs to pass through the bulkhead to connect to the heat source, which increases the risk of leakage in the fresh water tank

⑥When the heat source is hot oil, it cannot be in direct contact with drinking fresh water. It is necessary to heat the fresh water with hot oil first, and then use hot water to circulate and heat the fresh water tank in the coil. After two heat exchanges, the energy utilization efficiency is low

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