KR-20260062783-A - FUEL TREATMENT SYSTEM and ship having the same

KR20260062783AKR 20260062783 AKR20260062783 AKR 20260062783AKR-20260062783-A

Abstract

The fuel treatment system of the present invention includes: a disaster prevention unit that treats toxic fuel contained in a fluid using a disaster prevention substance; a toxic fuel inlet unit that introduces the fluid containing the toxic fuel into the disaster prevention unit; and a toxic fuel reduction unit that reduces the amount of toxic fuel using a reduction substance that crystallizes the toxic fuel introduced from the toxic fuel inlet unit and delivers it to the disaster prevention unit.

Inventors

신정훈
백동근

Assignees

에이치디한국조선해양 주식회사
에이치디현대중공업 주식회사

Dates

Publication Date: 20260507
Application Date: 20250306
Priority Date: 20241025

Claims (12)

A disaster prevention unit that treats toxic fuel contained in a fluid using a disaster prevention substance; A toxic fuel inlet for introducing the fluid containing the toxic fuel into the disaster prevention unit; and A fuel treatment system comprising a toxic fuel reduction unit that reduces the amount of toxic fuel by using a reduction substance that crystallizes the toxic fuel flowing in from the toxic fuel inlet unit and delivers it to the disaster prevention unit.
In paragraph 1, The Disaster Prevention Department, A scrubber section that sprays a disaster prevention substance to dissolve the toxic fuel contained in the fluid; An absorption tank section for dissolving the toxic fuel contained in the above fluid within a disaster prevention material; A wastewater tank for storing wastewater in which the toxic fuel is dissolved in at least one of the scrubber section and the absorption tank section; and It includes a disaster prevention material supply unit that supplies the above disaster prevention material to the scrubber unit and the absorption tank unit through a disaster prevention material supply line, and The above-mentioned toxic fuel reduction unit is, A fuel treatment system that, before the fluid containing the toxic fuel flows from the toxic fuel inlet to either the scrubber section or the absorption tank section, chemically reacts the toxic fuel with the reduction substance to form crystals, thereby allowing the fluid to flow into either the scrubber section or the absorption tank section in a state where the amount of the toxic fuel is reduced.
In paragraph 2, The above-mentioned toxic fuel reduction unit is, A reduction material storage tank for storing the above reduction material; A mixing chamber provided on a toxic fuel inlet line connecting the toxic fuel inlet section and the fire prevention section, for mixing the reduction substance supplied from the reduction substance storage tank and the toxic fuel introduced from the toxic fuel inlet line; A reduction substance injection unit provided inside the mixing chamber and spraying the reduction substance; and A fuel processing system comprising a reduction substance supply line connecting the reduction substance storage tank and the reduction substance injection unit.
In paragraph 3, The above fluid is a purging material or leaking material containing the toxic fuel, and The above toxic fuel is ammonia, and The above-mentioned disaster prevention material is water, and The above-mentioned reduction substance is carbon dioxide, and The above ammonia and the above carbon dioxide are, A chemical reaction takes place in the above mixing chamber to form ammonium carbonate series crystals, and The amount of the toxic fuel contained in the above fluid is, A fuel treatment system in which the amount of toxic fuel discharged from the mixing chamber is reduced by the amount of toxic fuel consumed in the chemical reaction in the mixing chamber relative to the amount of toxic fuel introduced into the mixing chamber.
In paragraph 4, The above-mentioned toxic fuel reduction unit is, A storage container provided below the mixing chamber for storing the ammonium carbonate series crystals; A crystal discharge line connecting the mixing chamber and the storage container; A downward valve provided on the crystal discharge line above; and A fuel processing system further comprising a decomposition gas delivery line connecting the storage container and the fire prevention unit.
In paragraph 5, The above storage container is, The above crystals of the ammonium carbonate series have insulation and cooling functions to prevent decomposition into the ammonia and carbon dioxide by external temperature, The above crystal is, When the supply of the above-mentioned reduction material is interrupted, the above-mentioned downward valve is opened, and the crystal falls by gravity through the above-mentioned crystal discharge line and is stored in the above-mentioned storage container, and The ammonia decomposed in the storage container is, A fuel processing system that is delivered to the fire prevention unit through the above decomposition gas delivery line.
In paragraph 3, A fire prevention material supply valve provided on the above fire prevention material supply line; A venting control valve provided on a toxic fuel vent line connected to a vent mast that discharges the above-mentioned toxic fuel into the atmosphere; A first concentration measuring sensor provided on the toxic fuel vent line upstream of the venting control valve, which measures the concentration of the toxic fuel vented through the toxic fuel vent line and controls the disaster prevention substance supply valve and the venting control valve; A reduction substance supply valve provided on the above reduction substance supply line; A pollutant control valve provided on the toxic fuel inlet line at the downstream end of the mixing chamber; and A fuel treatment system further comprising a second concentration measuring sensor provided on the toxic fuel inlet line upstream of the pollutant control valve, which measures the concentration of the toxic fuel flowing out through the toxic fuel inlet line and controls the reduction substance supply valve and the pollutant control valve.
In Paragraph 7, The above-mentioned first concentration measuring sensor is, If the concentration of the toxic fuel vented to the vent mast through the toxic fuel vent line exceeds a first set concentration value, the fire prevention material supply valve is opened and the venting control valve is closed. If the concentration of the toxic fuel vented to the vent mast through the toxic fuel vent line is less than or equal to the first set concentration value, the fire prevention material supply valve is kept in a closed or open state, and the venting control valve is kept in an open state. The above second concentration measuring sensor is, If the concentration of the toxic fuel delivered to the disaster prevention unit through the toxic fuel inlet line exceeds a second set concentration value which is greater than the first set concentration value, the reduction substance supply valve is opened and the pollutant control valve is closed. If the concentration of the toxic fuel delivered to the disaster prevention unit through the toxic fuel inlet line is between the first set concentration value and the second set concentration value, the reduction substance supply valve is kept in a closed or open state, and the pollutant control valve is kept in an open state. A fuel treatment system that, if the concentration of the toxic fuel delivered to the disaster prevention unit through the toxic fuel inlet line is less than or equal to the first set concentration value, maintains the reduction substance supply valve in a closed or open state and maintains the pollutant control valve in an open state.
In paragraph 8, The above first set concentration value is, The concentration of the toxic fuel released into the atmosphere is a concentration value that satisfies the prescribed safety concentration, and The above second set concentration value is, A fuel treatment system in which the concentration of the toxic fuel transferred from the toxic fuel reduction unit to the disaster prevention unit is a concentration value at which disaster prevention treatment can be performed at a safety concentration value specified in the disaster prevention unit.
In paragraph 1, The above-mentioned toxic fuel reduction unit is, A fuel treatment system that supplies a reduction substance when the inflow of the fluid containing the toxic fuel begins at the toxic fuel inflow section, and stops supplying the reduction substance when the inflow of the fluid is stopped.
In paragraph 1, The aforementioned disaster prevention department, A fuel processing system provided on the upper deck of a ship, between a fuel supply room that supplies fuel to a demand point and a vent mast that releases fuel into the atmosphere.
A vessel equipped with the above-mentioned fuel processing system according to any one of paragraphs 1 to 11.

Description

Fuel Treatment System and Ship Having the Same The present invention relates to a fuel processing system and a ship equipped with the same. As the IMO has decided to reduce carbon emissions by 40% for ships ordered after 2030 and by 50% by 2050 compared to ships ordered in 2008, the need for alternative fuels is increasing. Consequently, ammonia, a carbon-free fuel, is attracting global attention. In order to meet the EEDI regulations being implemented to reduce greenhouse gas emissions from ships, efforts have been made to improve the efficiency of ships primarily through technical means such as increasing ship size and improving the efficiency of hull shapes and propulsion systems. However, as many technical measures have already been applied, the expectation for further reduction of greenhouse gas emissions from ships is not high. Operational measures are a method for reducing greenhouse gas emissions; since a ship's fuel consumption increases sharply with speed, low-speed operation is one of the most representative means of reducing carbon dioxide. The shipping industry has already been lowering operating speeds compared to the past to conserve fuel, and the effectiveness of low-speed operation has been sufficiently proven. However, low-speed operation of ships reduces the cargo capacity per vessel, requiring additional ships to be deployed to deliver cargo on time, thereby increasing the shipping company's investment costs. Furthermore, operating at low speeds below the minimum engine load level can have an adverse effect on the engine, and since there is a limit to how much the engine load can be reduced, complete decarbonization can be considered impossible. Another way to reduce carbon emissions from ships is to use alternative fuels with low carbon dioxide emissions. In particular, LNG fuel is attracting attention as a next-generation clean ship fuel because it can meet the 2020 sulfur regulations and reduce fine dust and carbon dioxide. Previously, Boil-Off Gas generated from LNG carriers was used as the primary fuel for ships; however, as the eco-friendliness of LNG has become more prominent, there is a growing trend of using LNG as fuel even on vessels that are not LNG carriers. However, since LNG is essentially a fossil fuel that emits carbon dioxide, there are limitations to complete decarbonization (a reduction of about 20%). Therefore, despite technical and operational measures, it is inevitable that ship fuels will be replaced with carbon-neutral fuels for the complete decarbonization of shipping in the long term. Representative carbon-neutral fuels include biodiesel, biogas, methanol, hydrogen, and ammonia. Among these, research and development for using ammonia as fuel are actively underway because it is easy to store and transport, facilitates mass production through the Haber-Bosch process, and offers superior economic efficiency compared to other carbon-neutral fuels. When ammonia is used as fuel, it has advantages as a carbon-neutral fuel, but it presents difficulties in handling due to its chemical properties. For example, in ammonia-fueled vessels, safety issues for crew members due to toxicity are anticipated in the event of an ammonia fuel leak. In other words, since ammonia is exposed to the air in gaseous form, not only are significant respiratory problems expected, but safe handling of ammonia fuel leaks is required, including preparations for fires caused by ammonia gas. FIG. 1 is a side view illustrating a ship equipped with a fuel processing system according to one embodiment of the present invention. FIG. 2 is a schematic diagram illustrating a fuel treatment system according to one embodiment of the present invention. FIG. 3 is a drawing for explaining an embodiment of the disaster prevention unit shown in FIG. 2. FIG. 4 is a drawing for explaining another embodiment of the disaster prevention unit shown in FIG. 2. FIG. 5 is a drawing for explaining an embodiment of the toxic fuel reduction unit illustrated in FIG. 2. FIG. 6 is a drawing for explaining another embodiment of the toxic fuel reduction unit illustrated in FIG. 2. The objects, specific advantages, and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments in conjunction with the accompanying drawings. It should be noted that in assigning reference numerals to the components of each drawing in this specification, identical components are assigned the same number whenever possible, even if they are shown in different drawings. Furthermore, in describing the present invention, detailed descriptions of related prior art are omitted if it is determined that such detailed descriptions would unnecessarily obscure the essence of the invention. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. FIG. 1 is a side view illustrating a ship equipped with a fuel processing