Multi-protection system and method for ship vacuum condenser

Abstract

The invention discloses a multi-protection system and method for a ship vacuum condenser. The multi-protection system and method are applied to a ship condenser system. The system comprises three pressure switches arranged on a vacuum condenser, a seawater flow switch FS arranged on a cooling water output pipe, and a fourth pressure switch PS arranged on a high-pressure steam pipeline, and a system control box is arranged. The method mainly comprises the steps that when the measured pressure value of the first pressure switch PS is larger than a, the system control box sends out an alarm signal; when the measured pressure value of the second pressure switch PS is greater than a, the system control box controls an unloading valve to be closed; and when the measured pressure value of the third pressure switch PS is larger than a, the system control box controls a turbine control box to stop a turbine, and in addition, cooling seawater flow alarming and safety valve mechanical protection are arranged for multiple protection. Compared with the prior art, a vacuum condenser system can be better protected.

Description

technical field [0001] The invention relates to a ship's vacuum condenser, more specifically, to a multi-protection system and method for a ship's vacuum condenser. Background technique [0002] The cargo oil pump is the core equipment for cargo oil unloading on oil tankers. At present, the driving mode of cargo oil pumps on large oil tankers generally adopts the steam power cycle system with turbine as the main equipment—high pressure and high temperature (such as 1.6MPa, 203°C) produced by the auxiliary boiler of the ship. The saturated steam is transported to the turbine of the cargo oil pump through the pipeline, where it expands and works to drive the turbine impeller to run at high speed, and after being decelerated by the gears, it drives the cargo oil pump to work. The exhausted turbine steam after work enters the vacuum condenser, condenses to the bottom of the vacuum condenser in a certain vacuum environment and under the continuous cooling of seawater, and the con...

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Problems solved by technology

[0004] At present, in the design and construction of oil tankers, there have been problems such as insufficient vacuum inside the vacuum condenser, increased pressure on the shell side, and even explosion. The important reason is that the protection device in the past lacked monitoring of the cooling seawater. It will lose the fundamental condition of condensing into liquid water to form a vacuum, thus seriously affecting the protective effect of other protective devices, or even making them useless

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