Inert gas system for floating type oil storage-and-discharge device

Abstract

The invention relates to an inert gas system for a floating type oil storage-and-discharge device. The inert gas system for the floating type oil storage-and-discharge device comprises an exhaust gas and diesel oil mode inert gas unit, a sensor, an oil storage cabin and a control unit. The exhaust gas and diesel oil mode inert gas unit comprises an inert gas main pipe, an exhaust gas and diesel oil mode inert gas generation device, an oxygen analyzer, a deck water seal, a main pipe pressure adjusting valve, a main pipe pressure transmitter, a normally-opened shutoff valve and an oil cabin pressure adjusting valve. The inert gas main pipe communicated with the inert gas generation device is communicated with the oil storage cabin sequentially through the deck water seal, the main pipe pressure adjusting valve, the normally-opened shutoff valve and the oil cabin pressure adjusting valve. The exhaust gas and diesel oil mode inert gas generation device, the main pipe pressure adjusting valve and the oil cabin pressure adjusting valve are respectively and electrically connected with the control unit. The oxygen analyzer and the main pipe pressure transmitter arranged on the inert gas main pip are respectively and electrically connected with the control unit. The inert gas main pipe is provided with two branches, the first branch is communicated with the atmosphere through a control valve electrically connected with the control unit, and the second branch is provided with a pressure vacuum shutoff valve.

Description

technical field [0001] The invention relates to an inert gas system, in particular to a novel inert gas system for a floating oil storage and offloading device. Background technique [0002] The SOLAS Convention of the International Maritime Organization stipulates that an inert gas system should be installed on the floating oil storage and offloading unit (FPSO) where the flash point of crude oil (closed cup test) does not exceed 60°C and that uses crude oil washing operations. The inert gas system is actually a safety protection device to ensure the normal production and export operation of FPSO. The main function of the inert gas is to inert the gas in each oil storage tank and process treatment cabin, so as not to reach the level of supporting combustion. In addition, the inert gas can also make the oil storage tanks and process treatment cabins in a slightly positive pressure state to prevent air from entering, so as to maintain pressure and cover the oil storage tanks...

AI Technical Summary

Problems solved by technology

However, this kind of working condition generally only occurs when the thermal oil boiler itself or the entire smoke exhaust system fails and other accidental conditions, and it has limited effect on conventional working conditions where the flue gas volume is insufficient.

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