KR-20260064930-A - MULTIPURPOSE REACTION SYSTEM FOR SHIP

KR20260064930AKR 20260064930 AKR20260064930 AKR 20260064930AKR-20260064930-A

Abstract

A multi-purpose reaction system for a ship is disclosed. The multi-purpose reaction system for a ship according to the present embodiment is a multi-purpose reaction system for a ship that decomposes ammonia into hydrogen to supply hydrogen to an internal combustion engine of a ship propelled by ammonia as fuel, and for removing nitrogen oxides in the exhaust gas generated from the internal combustion engine, comprising: an ammonia storage tank; a pyrolysis unit that pyrolyzes ammonia supplied from the ammonia storage tank; and a reduction unit that receives exhaust gas generated from the internal combustion engine and reduces nitrogen oxides in the exhaust gas, wherein the pyrolysis unit and the reduction unit may be formed within a single reactor, and the reduction unit may be provided to be positioned in contact with at least a part of the pyrolysis unit.

Inventors

이종철
이학근

Assignees

삼성중공업 주식회사

Dates

Publication Date: 20260508
Application Date: 20241030

Claims (10)

In a multi-purpose reaction system for a ship that decomposes ammonia into hydrogen to supply hydrogen to an internal combustion engine of a ship propelled by ammonia as fuel, and removes nitrogen oxides in the exhaust gas generated by said internal combustion engine, Ammonia storage tank; A pyrolysis unit for pyrolyzing ammonia supplied from the above ammonia storage tank; and It includes a reduction unit that receives exhaust gas generated from the above internal combustion engine and reduces nitrogen oxides in the exhaust gas, A multi-purpose reaction system for a ship in which the pyrolysis unit and the reduction unit are formed within a single reactor, and the reduction unit is positioned to contact at least a portion of the pyrolysis unit.
In paragraph 1, The above pyrolysis part an ammonia supply line that receives the ammonia from the ammonia storage tank, and A multi-purpose reaction system for a ship comprising a hydrogen supply line that supplies hydrogen generated in the above pyrolysis unit to the above internal combustion engine.
In paragraph 1, The above reduction unit An exhaust gas supply line that receives the exhaust gas from the internal combustion engine, and A multi-purpose reaction system for a ship including a discharge line for discharging a reduction product generated in the above-mentioned reduction section to the outside.
In paragraph 3, A multi-purpose reaction system of a ship further comprising a first ammonia replenishment line that supplies ammonia from the ammonia storage tank to the internal combustion engine.
In paragraph 1, A multi-purpose reaction system for a ship in which the above-mentioned pyrolysis unit and the above-mentioned reduction unit are provided as a multi-walled reactor forming a multi-walled structure within a single reactor.
In paragraph 5, The above multi-walled reactor A multi-purpose reaction system for a ship comprising the above-mentioned pyrolysis unit; and a plurality of reduction units arranged stacked on the upper or lower part of the pyrolysis unit, with each reduction unit serving as a repeating unit.
In paragraph 6, The above pyrolysis part It includes a first reaction section having a first reaction space formed therein and a second reaction section that is in communication with the first reaction section and extends from the center of one end of the first reaction section to form a second reaction space. The above reduction unit A multi-purpose reaction system for a ship comprising a first reduction section having a first reduction space formed therein and a second reduction section communicating with the first reduction section, wherein one end of the second reduction section is formed by extending from the center of one end of the first reduction section to form a second reduction space.
In Paragraph 7, The first reaction unit and the second reduction unit are stacked, and the second reaction unit and the first reduction unit are stacked, A multi-purpose reaction system for a ship in which the other end of the second reaction section and the second reduction section is open.
In paragraph 8, The above multi-walled reactor an ammonia supply port that receives the ammonia from the ammonia storage tank, and A hydrogen outlet that supplies hydrogen generated in the above pyrolysis unit to the above internal combustion engine, and An exhaust gas supply port that receives the exhaust gas from the internal combustion engine, and A multi-purpose reaction system for a ship including an outlet for discharging a reduction product generated in the above-mentioned reduction section to the outside.
In Paragraph 9, A multi-purpose reaction system of a ship further comprising a second ammonia replenishment line that supplies ammonia from the ammonia storage tank to the exhaust gas supply port.

Description

Multipurpose Reaction System for Ship The present invention relates to a multi-purpose reaction system for a ship, and more specifically, to a multi-purpose reaction system for a ship propelled by ammonia as fuel, for decomposing ammonia into hydrogen to supply hydrogen to an internal combustion engine, and simultaneously removing nitrogen oxides from the exhaust gas generated by the internal combustion engine. The International Maritime Organization aims to reduce carbon dioxide emissions in the shipping sector by 40% compared to 2008 levels by 2030, and starting in 2020, it will implement Phase 2 of the Energy Efficiency Design Index, requiring new ships to be designed with 20% improved energy efficiency. Ammonia is receiving significant attention as an energy carrier to address tightening greenhouse gas emission regulations. Ammonia does not contain carbon, so it does not generate carbon dioxide during use, and it has the advantage of being easy to store and transport as it liquefies at 10 bar or less when compressed at room temperature. However, ammonia has characteristics that are relatively disadvantageous for combustion compared to conventional fuels. Specifically, when ammonia is supplied to a ship's engine for combustion, the flame propagation speed inside the engine cylinder is only 10 to 20% of that of methane, making it difficult to secure combustion efficiency. Furthermore, the ignition delay time during the combustion of ammonia is relatively longer than that of diesel fuel, making it difficult to induce a stable combustion reaction. Consequently, when using ammonia as fuel, a relatively high compression ratio compared to conventional fuels must be maintained to create a high-temperature combustion environment, which imposes limitations on engine design and the setting of operating conditions. In addition, although ammonia is a carbon-free fuel, it generates nitrogen oxides ( NOx ) when burned, and there are environmental pollution problems when it is emitted along with unburned ammonia. FIG. 1 is a diagram showing the structure of a multi-purpose reaction system of a ship according to one embodiment of the present invention, FIG. 1(a) is a diagram showing the structure of a multi-purpose reaction system of a ship, and FIG. 1(b) is a diagram showing chemical reactions occurring in the pyrolysis section and the reduction section, respectively. FIGS. 2 to 4 are drawings showing various structures of a multi-purpose reaction system of a ship according to different embodiments of the present invention. FIGS. 5 to 6 are drawings showing various structures of a multi-purpose reaction system of a ship according to another embodiment of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are presented to sufficiently convey the concept of the present invention to those skilled in the art to which the present invention pertains. The present invention is not limited to the embodiments presented herein and may be embodied in other forms. In order to clarify the present invention, the drawings may omit the illustration of parts unrelated to the description and may slightly exaggerate the size of components to aid understanding. In this specification, the term "ship" includes all marine structures, including containers, merchant ships, vessels capable of producing natural gas at sea, gas platforms, and offshore floating structures, which can be propelled using ammonia. FIG. 1 is a diagram showing the structure of a multi-purpose reaction system of a ship according to one embodiment of the present invention, FIG. 1(a) is a diagram showing the structure of a multi-purpose reaction system of a ship, and FIG. 1(b) is a diagram showing chemical reactions occurring in the pyrolysis section and the reduction section, respectively. A multi-purpose reaction system (10) for a ship according to one embodiment of the present invention is configured to decompose ammonia into hydrogen to supply hydrogen to an internal combustion engine (20) of a ship propelled by using ammonia as fuel, and at the same time remove nitrogen oxides in the exhaust gas generated from the internal combustion engine (20). Referring to FIG. 1, it is configured to include an ammonia storage tank (100), a pyrolysis unit (200), and a reduction unit (300). An ammonia storage tank (100) is for storing ammonia and is placed inside the hull. At this time, the ammonia storage tank (100) may be a storage tank for storing ammonia for transport or a fuel storage tank for storing ammonia for fuel in an ammonia-fueled propulsion vessel, and the ammonia may include liquid ammonia and gaseous ammonia. The ammonia storage tank (100) may be a membrane-type tank or an independent tank, and the type is not particularly limited. The ammonia storage tank (100) stores low-temperature liquid ammonia and ammonia vaporized gas, and a pressure pump (not shown