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KR-20260063494-A - Ammonia Fueled Ship Equipped with Sulfur Oxide Cleaning Facilities

KR20260063494AKR 20260063494 AKR20260063494 AKR 20260063494AKR-20260063494-A

Abstract

The present invention relates to an ammonia-fueled propulsion vessel equipped with a sulfur oxide scrubbing facility configured to utilize leaked/contaminated ammonia and ammonia transferred from an ammonia recovery and regeneration facility as a neutralizing agent without installing a separate facility for a neutralizing agent required for the operation of a sulfur oxide scrubbing facility for reducing sulfur oxides emitted from the internal combustion engine of the vessel, comprising: an ammonia service tank (120); a fuel supply valve unit (150); an ammonia dual-fuel engine (160); an ammonia recovery unit (300) configured to collect leaked/contaminated ammonia, dilute it with dilution water, and store it temporarily; and an ammonia regeneration system (400) connected to the ammonia recovery unit (300). and a sulfur oxide cleaning facility (500); wherein the sulfur oxide cleaning facility (500) uses ammonia water as a sulfur oxide neutralizing agent and is configured to be selectively supplied from the ammonia recovery unit (300) and the ammonia regeneration system (400).

Inventors

  • 김양곤
  • 이영철
  • 박준성

Assignees

  • 국립목포해양대학교산학협력단
  • 사단법인 한국선급

Dates

Publication Date
20260507
Application Date
20241030

Claims (6)

  1. Ammonia service tank (120); Fuel supply valve unit (150); Ammonia dual-fuel engine (160); An ammonia recovery unit (300) configured to collect leaked or contaminated ammonia, dilute it with dilution water, and store it temporarily; An ammonia regeneration system (400) connected to the above ammonia recovery unit (300); and Sulfur oxide cleaning equipment (500); including, The above sulfur oxide cleaning facility (500); Seawater intake port (501); Seawater discharge outlet (502); Scrubber (510); and Includes a cleaning water circulation tank (540); Ammonia water is supplied to the above-mentioned cleaning water circulation tank (540) as a sulfur oxide neutralizing agent, and An ammonia fuel propulsion vessel equipped with a sulfur oxide cleaning facility, characterized in that the ammonia water is configured to be selectively supplied from the ammonia recovery unit (300) and the ammonia regeneration system (400).
  2. In paragraph 1, The above ammonia recovery unit (300) is, an ammonia drain tank (310) for temporarily storing ammonia water diluted with dilution water to remove leaked ammonia; and It includes a leak ammonia transfer pump (320) for transferring ammonia water from the ammonia drain tank (310) above, and An ammonia fuel propulsion vessel equipped with a sulfur oxide cleaning facility, characterized in that the above-mentioned leak ammonia ason pump (320) is configured to selectively transfer ammonia water stored in the above-mentioned ammonia drain tank (310) to the above-mentioned ammonia regeneration system (400) and the above-mentioned cleaning water circulation tank (540).
  3. In paragraph 1, The above ammonia regeneration system (400) is, A distillation tower (410) configured to receive leaked/contaminated ammonia stored in the above ammonia drain tank (310) by diluting it with diluting water; An evaporator heater (420) located at the bottom of the distillation tower (410) and generating ammonia vapor from diluted leaked/contaminated ammonia supplied into the distillation tower (410); A regenerative heat exchanger (450) that converts the ammonia vapor transferred through the distillation tower (410) into liquid ammonia; It includes an ammonia treatment tank (470) for storing high-purity ammonia extracted from the above-mentioned liquid ammonia, and An ammonia fuel propulsion vessel equipped with a sulfur oxide cleaning facility, characterized in that the high-purity ammonia stored in the ammonia treatment tank (470) is configured to be selectively transferred to the ammonia service tank (120), boiler (161), and cleaning water circulation tank (540).
  4. In paragraph 2 or 3, A neutralizing agent storage tank (700) for storing ammonia water to be used transferred from an ammonia drain tank (310); and an ammonia treatment tank (470) is additionally provided, and An ammonia fuel propulsion vessel equipped with a sulfur oxide cleaning facility, characterized by being configured to supply ammonia water for neutralizing agent from the above neutralizing agent storage tank (700) to the above cleaning water circulation tank (540).
  5. In paragraph 3, An auxiliary pump (190) is additionally installed between the ammonia service tank (120) and the ammonia treatment tank (470), and The above auxiliary pump (190) An ammonia fuel propulsion vessel equipped with a sulfur oxide cleaning facility, characterized in that when the supply of the above neutralizing agent is insufficient, the ammonia in the above ammonia service tank (120) can be transferred to the above ammonia treatment tank (470).
  6. In paragraph 5, The ammonia fuel propulsion vessel equipped with a sulfur oxide cleaning facility is further characterized in that the first controller (491) above additionally includes a configuration that operates using a signal from a gas-liquid separation chamber pressure sensor (201) that detects a pressure change of the gas-liquid separation chamber (200).

Description

Ammonia Fueled Ship Equipped with Sulfur Oxide Cleaning Facilities Ammonia Fueled Ship Equipped with Sulfur Oxide Cleaning Facilities The present invention relates to an ammonia-fueled vessel equipped with a sulfur oxide scrubbing facility, and more specifically, to an ammonia-fueled vessel equipped with a sulfur oxide scrubbing facility configured to utilize leaked or contaminated ammonia and ammonia transferred from an ammonia recovery and regeneration facility as a neutralizing agent, without installing a separate facility for a neutralizing agent required for the operation of a sulfur oxide scrubbing facility to reduce sulfur oxides emitted from the vessel's internal combustion engine. An ammonia-fueled vessel is a ship that uses ammonia as fuel as a power source. Since ammonia produces almost no greenhouse gases such as CO2 during combustion, ammonia fuel is an eco-friendly fuel that can reduce the impact on climate change. In addition, ammonia is a fuel with high energy density, allowing it to supply a large amount of energy with a relatively small amount of fuel. This helps ships travel longer distances or maintain high speeds. Ammonia is stable in its liquid state and offers high stability in fuel delivery and storage, which can help improve the reliability of ship operations. Furthermore, it can be produced as a carbon-neutral fuel during the production phase, making it a carbon-neutral fuel that can reduce the total carbon emissions of ship operations by using ammonia fuel. However, as a fuel for marine internal combustion engines, ammonia requires a high compression ratio (compression ratio of 35 or higher) for ignition and combustion, making it unsuitable for use in internal combustion engines based on compression ignition. Therefore, marine internal combustion engines using ammonia fuel require pilot oil to aid combustion, regardless of the difference in thermodynamic cycles (diesel cycle or Otto cycle). Pilot oil applied to internal combustion engines of ships using conventional ammonia fuel is used up to 10% (ammonia fuel up to 90%), and when high-sulfur fuel (sulfur content of 3.5% or more) is used as pilot oil, sulfur oxide scrubbing equipment must be installed to reduce sulfur oxides (SOx) in exhaust gas to less than 0.5%. Existing sulfur oxide scrubbing systems installed on ships use seawater or fresh water as scrubbing water to remove sulfur oxides from exhaust gases. However, depending on the operation method, a separate neutralization system is applied to neutralize the acidified scrubbing water (pH 3 or lower), and sodium hydroxide (NaOH) is used as a neutralizing agent. As such, using sodium hydroxide as a neutralizing agent in sulfur oxide scrubbing systems not only requires additional facilities to safely store, manage, and supply the strong alkaline chemical on board the ship, but also poses a problem of causing a high economic burden on ship operators due to the high supply price. FIG. 1. Front view of an ammonia-fueled vessel according to the prior art. FIG. 2. Block diagram of an ammonia-fueled vessel equipped with a sulfur oxide cleaning facility according to the present invention. Fig. 3. Block diagram of an ammonia recovery unit and an ammonia regeneration system connected to a sulfur oxide cleaning facility of the present invention. Fig. 4. Conceptual control diagram of the ammonia regeneration system of the present invention. Fig. 5. Block diagram of the sulfur oxide cleaning facility of the present invention. The present invention will be described below with reference to the attached drawings. However, the present invention can be implemented in various different forms and is therefore not limited to the embodiments described herein. Throughout the specification, when it is stated that a part is "connected (connected, in contact, combined)" with another part, this includes not only cases where they are "directly connected," but also cases where they are "indirectly connected" with other members interposed between them. Furthermore, when it is stated that a part "includes" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but rather allows for the inclusion of additional components. The terms used herein are merely for describing specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as “comprising” or “having” are intended to indicate the presence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. FIG. 2 is a block diagram of an ammonia-fueled vessel equipped with a sulfur oxide cleaning facility according to the present invention, FIG. 3