KR-20260063855-A - Nitrogen purging system for Ammonia fuel vessel

KR20260063855AKR 20260063855 AKR20260063855 AKR 20260063855AKR-20260063855-A

Abstract

The nitrogen purge system for an ammonia-fueled vessel according to the present invention comprises: an engine driven by receiving ammonia moving through a fuel supply line in a first normal situation; a gas-liquid separator into which the ammonia discharged from the engine flows through a first line connected to the engine in a second situation in which the engine stops or a fire occurs; a water tank into which the gaseous ammonia separated from the gas-liquid separator flows through a second line connected to the gas-liquid separator and in which water is stored; a first purge gas line connected to the fuel supply line or the engine to purge between the engine and the gas-liquid separator; a second purge gas line joined to the second line to purge the second line; and a purge gas generating unit to which the first purge gas line is connected. The second purge gas line branches off from the first purge gas line, and to prevent the first purge gas line and the second purge gas line from opening simultaneously, the first purge gas line opens and the ammonia in the engine is purged, and after the first purge gas line is closed, the second purge gas line opens and the second line It is being fuzzed. The present invention can improve the safety of ammonia-fueled vessels by preventing problems such as explosions caused by ammonia in the engine during situations such as engine shutdown.

Inventors

강연태
이종철

Assignees

삼성중공업 주식회사

Dates

Publication Date: 20260507
Application Date: 20241031

Claims (6)

An engine driven by ammonia supplied through a fuel supply line in the first normal state; In a second situation where the above-mentioned engine stops or a fire occurs, a gas-liquid separator into which the ammonia discharged from the engine flows by moving along a first line connected to the engine; A water tank in which water is stored, into which the gaseous ammonia separated from the gas-liquid separator flows by moving along a second line connected to the gas-liquid separator; A first purge gas line connected to the fuel supply line or the engine, purging between the engine and the gas-liquid separator; A second purge gas line joined to the second line and purging the second line; and It includes a purge gas generating unit to which the above-mentioned first purge gas line is connected, and The second purge gas line above branches off from the first purge gas line, and A nitrogen purge system for an ammonia-fueled vessel, wherein the first purge gas line and the second purge gas line are not opened simultaneously, and after the first purge gas line is opened to purge the ammonia in the engine, the second purge gas line is opened to purge the second line.
In paragraph 1, A nitrogen purge system for an ammonia-fueled vessel, comprising a check valve provided in the second line above, further provided upstream of the second purge gas line joining point.
In paragraph 1, A nitrogen purge system for an ammonia-fueled vessel, further comprising an ammonia detector provided in the second line above, provided downstream of the second purge gas line joining point.
In paragraph 3, The above ammonia detector, It includes a first ammonia sensor and a second ammonia sensor, and The first ammonia sensor is adjacent to the gas-liquid separator in the second line more than the second ammonia sensor, and The above second ammonia sensor is an ammonia fuel vessel nitrogen purge system that is adjacent to the water tank than the gas-liquid separator in the second line and adjacent to the water tank than the first ammonia sensor.
In paragraph 1, It further includes a flow sensor or pressure sensor provided in the first line above, and A nitrogen purge system for an ammonia fuel vessel, wherein the opening of the first purge gas line or the second purge gas line is adjusted according to the detection value of the flow sensor or the pressure sensor.
In paragraph 1, A nitrogen purge system for an ammonia fuel vessel, further comprising a water remover that absorbs water, which is provided downstream of the confluence point of the second purge gas line in the second line and is adjacent to the water tank rather than the gas-liquid separator.

Description

Nitrogen purging system for ammonia fuel vessel The present invention relates to a nitrogen purge system for ammonia-fueled ships. Ships can be propelled using diesel engines that generate driving force using diesel oil, gas engines that generate driving force using gas such as LNG, and dual-fuel engines that generate driving force using a mixture of diesel oil and gas. Recently, with the increasing demand for eco-friendly and high-efficiency engines due to stricter IMO environmental regulations, research on propulsion systems utilizing various fuels is actively underway. In particular, ammonia is attracting attention as an eco-friendly fuel because it does not contain carbon. However, since the characteristics of LNG and ammonia differ, ships operating on LNG fuel require modifications not only to the ammonia engine but also to the surrounding components in order to use ammonia as fuel. FIG. 1 is a drawing illustrating a ship equipped with a nitrogen purge system for an ammonia-fueled ship according to some embodiments of the present invention. FIG. 2 is a diagram illustrating the ammonia treatment of a nitrogen purge system for an ammonia-fueled ship according to the first embodiment of the present invention. FIG. 3 is a diagram illustrating the ammonia treatment of a nitrogen purge system for an ammonia-fueled ship according to a second embodiment of the present invention. FIG. 4 is a diagram illustrating the ammonia treatment of a nitrogen purge system for an ammonia-fueled ship according to a third embodiment of the present invention. FIG. 5 is a diagram illustrating the ammonia treatment of a nitrogen purge system for an ammonia-fueled ship according to the fourth embodiment of the present invention. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. The advantages and features of the present invention, and the methods for achieving them, will become clear by referring to the embodiments described below in detail together with the attached drawings. However, the present invention is not limited to the embodiments disclosed below but can be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Throughout the specification, the same reference numerals refer to the same components. FIG. 1 is a drawing illustrating a ship equipped with a nitrogen purge system for an ammonia fuel ship according to some embodiment of the present invention, and FIG. 2 is a drawing for explaining the ammonia treatment of a nitrogen purge system for an ammonia fuel ship according to a first embodiment of the present invention. Referring to FIGS. 1 and 2, an ammonia fuel vessel (100) can use ammonia as fuel and may include an engine (130) and a nitrogen purge system (gas-liquid separator (140), water tank (150), a first purge gas line (PL1) and a second purge gas line (PL2)). The engine (130) can use ammonia as fuel. For example, the engine (130) can be connected to a fuel supply system (125). Here, the fuel supply system (125) can receive ammonia from the ammonia storage tank (121), heat and/or pressurize the ammonia to fuel specifications such as the temperature and/or pressure required by the engine (130), and supply it to the engine (130). For example, the fuel supply system (125) may include a compressor (not shown), a pump (not shown), and/or a heater (not shown), etc. And the storage tank (121) may be formed as an atmospheric pressure tank and/or a pressure tank in which the internal pressure is maintained at a constant level so as to store ammonia, but is not limited thereto. In addition, the storage tank (121) may be provided in a cylinder form, but various variations such as a membrane type are possible. Ammonia stored in the storage tank (121) can be stored at a pressure of 5 bar and room temperature, but during the process of supplying it to the engine (130), that is, through the fuel supply system (125), both the temperature and pressure may increase. In other words, the engine (130) is driven by receiving ammonia that travels through the fuel supply line (L1) of the fuel supply system (125) in a normal first condition, and the ammonia traveling through the fuel supply line (L1) can achieve the temperature and/or pressure required by the engine (130) by the fuel supply system (125). However, in the second situation where the engine (130) is stopped (Engine stop or Shutdown) or a fire occurs, if fuel remains in the engine (130), the ammonia, whose temperature/pressure has increased to match the required pressure/temperature of the engine (130), is at risk of explosion. Accordingly, in the second situation, it is necessary for all ammonia within the engine (130) to be discharged from the engine (130). To thi