FI-20265282-A1 - MARINE VESSEL

FI20265282A1FI 20265282 A1FI20265282 A1FI 20265282A1FI-20265282-A1

Abstract

This ship comprises: a hull; a combustion device that is provided to the hull and that burns fuel; a scrubber that is provided to the hull and that cleans exhaust gas from the combustion device by using seawater; a capture system that is provided to the hull and that captures carbon dioxide from the exhaust gas which has passed through the scrubber; a first seawater-introduction piping system that enables seawater from the outside of the hull to be taken into the scrubber; and a temperature raising unit that can raise the temperature of the seawater flowing through the first seawater-introduction piping system.

Inventors

MORI HIDEO
YANAGISAWA HIROYUKI
UNSEKI TAKASHI

Assignees

MITSUBISHI SHIPBUILDING CO LTD

Dates

Publication Date: 20260324
Application Date: 20241004
Priority Date: 20231010

Claims (1)

Claims 1. A marine vessel comprising: a hull; a combustion device that is provided in the hull and combusts fuel; a scrubber that is provided in the hull and scrubs exhaust gas discharged from the combustion device with seawater; a capture system that is provided in the hull and captures carbon dioxide from the exhaust gas having passed through the scrubber; a No.1 seawater intake that is capable of taking seawater into the scrubber from an outside of the hull; and a heater that is capable of heating the seawater flowing through the No.l seawater intake. 2. The marine vessel according to claim 1, further comprising: a No.2 seawater intake into which seawater is capable of being taken from the outside of the hull; and © . N a No.1 heat exchanger that exchanges heat between the seawater taken into the A se No.2 seawater intake and a coolant used to cool the combustion device, = . . . . N wherein the heater is capable of taking the seawater, which has passed through I a . . . a the No.1 heat exchanger, into the No.1 seawater intake from the No.2 seawater intake. N co N LO © S 3. The marine vessel according to claim 2, further comprising: a No.3 seawater intake into which seawater is capable of being taken from the - 34 - outside of the hull; and a No.2 heat exchanger that exchanges heat between the seawater taken into the No.3 seawater intake and a coolant used to cool a heat generation source provided in the hull other than the combustion device, wherein the heater is capable of taking the seawater, which has passed through the No.2 heat exchanger, into the No.1 seawater intake from the No.3 seawater intake. 4. The marine vessel according to claim 3, wherein the No.2 seawater intake and the No.3 seawater intake are connected to be communicable with each other, and the heater is capable of taking the seawater, which has passed through both the No.1 heat exchanger and the No.2 heat exchanger, into the No.1 seawater intake. 5. The marine vessel according to claim 1 or 2, further comprising: a branch piping system which branches off from the No.1 seawater intake and into which a portion of the seawater is capable of being taken from the No.1 seawater intake; and a No.3 heat exchanger that exchanges heat between the seawater taken into the © S branch piping system and a coolant used to cool a heat generation source provided in 9 the hull other than the combustion device, = . . . . N wherein the heater is capable of taking the seawater, which has passed through I id . . L. a the No.3 heat exchanger, into the No.1 seawater intake from the branch piping system. N co N LO © N O N - 35 -

Description

MARINE VESSEL Technical Field [0001] The present disclosure relates to a marine vessel. Priority is claimed on Japanese Patent Application No. 2023-175047, filed October 10, 2023, the content of which is incorporated herein by reference. Background Art [0002] PTL 1 discloses a marine desulfurization apparatus that is used to desulfurize exhaust gas discharged from an exhaust gas generation device mounted on a marine vessel. In this marine desulfurization apparatus, seawater or fresh water is sprinkled onto the exhaust gas as a scrubbing liquid and the exhaust gas and the scrubbing liquid are brought into gas-liquid contact with each other, so that sulfur components contained in the exhaust gas are removed. Citation List Patent Literature [0003] © . . . . . N [PTL 1] Japanese Unexamined Patent Application Publication No. 2019- A 8 104482 s . N Summary of Invention I x Technical Problem N N [0004] O S Incidentally, in a case where seawater is used as the scrubbing liguid in the marine desulfurization apparatus disclosed in PTL 1, the temperature of the seawater - 1 - taken in from the outside of the marine vessel as the scrubbing liquid may be low, for example, about 5°C, depending on the season or a sea area in which the marine vessel navigates. In a case where the exhaust gas is desulfurized by the low-temperature seawater, the temperature of the desulfurized exhaust gas is also lowered. In a case where the marine vessel is provided with a carbon dioxide capture system that captures carbon dioxide contained in exhaust gas, there is a problem in that the capturing efficiency at the time of capturing of the carbon dioxide contained in the exhaust gas decreases in a case where the temperature of the desulfurized exhaust gas is low. [0005] The present disclosure has been made to solve the above-described problem, and an object of the present disclosure is to provide a marine vessel that can suppress a decrease in the temperature of scrubbed exhaust gas in a case where the exhaust gas is scrubbed with seawater. Solution to Problem [0006] In order to solve the above problem, a marine vessel according to the present disclosure includes a hull, a combustion device, a scrubber, a capture system, a No.1 S seawater intake, and a heater. The combustion device is provided in the hull and se combusts fuel. The scrubber is provided in the hull and scrubs exhaust gas J discharged from the combustion device with seawater. The capture system is E provided in the hull and captures carbon dioxide from the exhaust gas having passed 3 through the scrubber. The No.1 seawater intake is capable of taking seawater into the S scrubber from an outside of the hull. The heater is capable of heating the seawater flowing through the No.1 seawater intake. - 2 - Advantageous Effects of Invention [0007] According to the marine vessel of the present disclosure, in a case where exhaust gas is scrubbed with seawater, a decrease in the temperature of the scrubbed exhaust gas can be suppressed. Brief Description of Drawings [0008] FIG. 1 is a side view showing a schematic configuration of a marine vessel according to an embodiment of the present disclosure. FIG. 2 is a diagram showing a schematic configuration of a seawater intake according to a first embodiment of the present disclosure. FIG. 3 is a diagram showing a state in which seawater having passed through a No.1 heat exchanger is fed into a No.l seawater intake in the seawater intake according to the first embodiment of the present disclosure. FIG. 4 is a diagram showing a modification example of the seawater intake according to the first embodiment of the present disclosure. FIG. 5 is a diagram showing a schematic configuration of a seawater intake according to a second embodiment of the present disclosure. S FIG. 6 is a diagram showing a state in which seawater having passed through a se No.1 heat exchanger and a No.2 heat exchanger is fed into a No.1 seawater intake in N the seawater intake according to the second embodiment of the present disclosure. E FIG. 7 is a diagram showing a schematic configuration of a seawater intake 3 according to a third embodiment of the present disclosure. S FIG. 8 is a diagram showing a state in which seawater having passed through a No.1 heat exchanger and a No.3 heat exchanger is fed into a No.1 seawater intake in - 3 - the seawater intake according to the third embodiment of the present disclosure. Description of Embodiments [0009] Hereinafter, a marine vessel according to an embodiment of the present disclosure will be described with reference to FIGS. 1 to 8. <First Embodiment> (Overall Configuration of Marine Vessel) As shown in FIG. 1, a marine vessel 1 according to the present embodiment includes a hull 2, a combustion device 8, a scrubber 20, a capture system 30, a seawater intake SOA (see FIG. 2), and a heater 70A (see FIG. 2). The type of the marine vessel 1 according to the present embodiment is not limited to a specific type. A liquefied gas