KR20240076428A - Apparatus for reducing greenhouse gas emission in vessel and vessel including the same - Google Patents

Abstract

The present invention provides an absorbent liquid circulation supply unit that provides and circulates an absorbent liquid that absorbs CO ₂ , an exhaust gas cooling unit that cools the exhaust gas discharged from a ship engine, and is formed inside the engine casing and reacts the cooled exhaust gas with the absorbent liquid. The regenerated reactant and the carbonate aqueous solution in the regenerated reactant storage tank provided separately on the port side and starboard side of the absorption tower and engine casing, which includes a CO ₂ removal unit that captures CO ₂ by converting CO ₂ into an aqueous carbonate solution. By reacting in a mixing tank, the absorbent liquid is regenerated, the absorbent liquid regeneration unit that generates sediment, and the sediment are separated. When discharging overboard, the sediment is discharged overboard by seawater, and when stored onboard, the sediment is stored in a sediment storage tank. Provides a greenhouse gas emission reduction device for ships, including a sediment treatment unit, that allows the vessel to do so.

Description

Ship's greenhouse gas emission reduction device and ship equipped with the same {APPARATUS FOR REDUCING GREENHOUSE GAS EMISSION IN VESSEL AND VESSEL INCLUDING THE SAME}

The present invention relates to a ship's greenhouse gas emission reduction device and a ship equipped with the same. More specifically, it is possible to mineralize CO ₂ and discharge it overboard by meeting overboard emission conditions, and to minimize corrosion of the separator by seawater. , relates to a ship's greenhouse gas emission reduction device and a ship equipped with the same, which can facilitate overboard discharge and unloading of sediment by arranging the sediment storage tank according to the arrangement of the regeneration reactant storage tank during onboard storage.

Recently, global warming and related environmental disasters have been occurring due to the effects of greenhouse gas emissions caused by indiscriminate use of fossil fuels.

Accordingly, a series of technologies related to capturing and storing carbon dioxide, a representative greenhouse gas, without emitting it is called CCS (Carbon dioxide Capture and Storage) technology, and has recently been receiving great attention. Among CCS technologies, chemical absorption is It is the most commercialized technology among them in that it is capable of large-scale processing.

In addition, carbon dioxide emissions are regulated through IMO's EEDI, which aims to reduce more than 50% of 2008 emissions by 2050, and 40% of 2008 emissions must be reduced in 2030, so there is no need to emit CO ₂ or , technology to capture emitted CO ₂ is attracting attention.

For reference, among CCS technologies that directly capture and store carbon dioxide, _CO2 capture technology can be approached in various ways depending on the _CO2 generation conditions of the target process. Currently, representative technologies include absorption, adsorption, and membrane separation, among which The wet absorption method has a high technological maturity in land plants and is easy to process large quantities of _CO2 , so it can be said to be the capture technology closest to commercialization of CCS technology, and amines and ammonia are mainly used as absorbents.

Meanwhile, the aforementioned technology for reducing carbon dioxide emissions or capturing generated carbon dioxide has not been commercialized on ships at present, and methods for using hydrogen or ammonia as fuel are currently being developed and are at the commercialization level. It has not yet been reached.

In addition, _in ships equipped with scrubbers to _use high-sulfur oil, the solubility _{of SO} In particular, there is a problem that greenhouse gas removal costs increase due to the use of separate consumable absorbent liquid raw materials for CO ₂ removal.

Accordingly, without the need for separate consumable absorbent raw materials, for ships using fossil fuels, CO ₂ from the exhaust gas emitted from the ship's engine can be converted into a material that does not affect the environment and easily discharged overboard at low cost. There is a need to apply technology to ships to convert them into useful substances, temporarily store them, unload them, and remove them.

Korean Patent Publication No. 10-2031210 (Exhaust gas reduction device and pollutant removal method for ships, announced on October 11, 2019) Korean Patent Publication No. 10-1201426 (Greenhouse gas reduction device for ships, announced on November 14, 2012)

The technical task to be achieved by the idea of the present invention is to mineralize CO ₂ and discharge it overboard by meeting the overboard discharge conditions, and to minimize corrosion of the separator due to seawater. When stored on board, depending on the arrangement of the regeneration reactant storage tank, The object is to provide a ship's greenhouse gas emission reduction device that can facilitate overboard discharge and unloading of sediment by arranging a sediment storage tank, and a ship equipped with the same.

In order to achieve the above-described object, an embodiment of the present invention includes an absorbent liquid circulation supply unit that provides and circulates an absorbent liquid for absorbing CO ₂ ; An exhaust gas cooling unit that cools the exhaust gas discharged from the ship engine; An absorption tower formed inside the engine casing and including a CO ₂ removal unit that reacts the cooled exhaust gas and the absorption liquid to convert CO ₂ into an aqueous carbonate solution and collect CO ₂ ; An absorbent liquid regeneration unit that reacts the carbonate aqueous solution with the regenerated reactant of the regenerated reactant storage tank provided separately on the port side and the starboard side of the engine casing in a mixing tank to regenerate the absorbent liquid and generate a precipitate; and a sediment disposal unit that separates the sediment, discharges the sediment overboard with seawater when discharging overboard, and stores the sediment in a sediment storage tank when stored onboard. A greenhouse gas emission reduction device for a ship, including a. provides.

Here, the mixing tanks may be placed separately at the bottom of the regeneration reactant storage tank.

At this time, the sediment storage tank may be placed in the stern tank.

Specifically, the bottom of the regeneration reactant storage tank may have a silo structure.

In addition, the absorption liquid is a monovalent aqueous alkaline solution and includes any one of an aqueous LiOH solution, an aqueous NaOH solution, an aqueous KOH solution, and an aqueous NH ₄ OH solution, the regeneration reactant is Ca(OH) ₂ or CaO, and the precipitate is CaCO ₃ days. You can.

In addition, when discharging overboard, the sediment treatment unit may perform a separation process of the sediment and the absorbent liquid, a discharge process of the sediment with seawater, and further perform a cleaning process with fresh water.

Here, when discharging overboard, the sediment disposal unit sucks and separates the sediment and the absorbent liquid from the absorbent liquid regeneration unit, dilutes the sediment with seawater and discharges it overboard so that the sediment satisfies the overboard discharge conditions, and , if the sediment does not meet the overboard discharge conditions, the sediment may be temporarily stored.

At this time, the sediment disposal unit includes a separation pump for sucking the sediment and the absorbent liquid from the absorbent liquid regeneration unit for overboard discharge, and separates the sediment and the absorbent liquid transferred from the separation pump to discharge the sediment overboard. In order to do so, the absorbent liquid may include a separator that returns the absorbent liquid to the circulation supply unit, and a discharge dissolved water pump that supplies the seawater to the separator to dilute the sediment and discharge it overboard.

In addition, the separator may be a filter-type separator or a centrifugal separator that separates the precipitate and the absorbent liquid from each other.

In addition, the sediment treatment unit may further include a fresh water supply valve that supplies the fresh water to the separator to clean the separator.

Here, the sediment treatment unit may further include a fresh water cooler that cools the sea water supplied to the discharge dissolved water pump with cooling fresh water.

At this time, the sediment discharged from the separator can be diluted by supplying cooled seawater through the fresh water cooler and discharged overboard.

In addition, the sediment treatment unit includes a sensor for measuring one or more of turbidity, pH, and oil content of the sediment separated from the separator, and determines whether the overboard discharge condition corresponding to the measured value by the sensor is met. Depending on the situation, it can be discharged overboard or temporarily stored.

In addition, it further includes a seawater supply unit that supplies seawater from the outside of the ship, and the exhaust gas cooling unit can cool the exhaust gas discharged from the ship engine by reacting the exhaust gas with the seawater supplied from the seawater supply unit.

Additionally, the exhaust gas cooling unit may cool the exhaust gas discharged from the ship engine by reacting it with fresh water.

In addition, the exhaust gas cooling unit can cool the exhaust gas by circulating fresh water provided from the onboard cooling system through a heat exchange pipe surrounding the exhaust gas discharge pipe.

Additionally, the exhaust gas cooling unit may be provided inside the absorption tower.

In addition, the absorbent liquid circulation supply unit includes an absorbent liquid storage tank that stores the absorbent liquid, an absorbent liquid pump that pumps and transfers the absorbent liquid from the absorbent liquid storage tank, the carbonate aqueous solution discharged from the absorption tower, and an absorbent liquid supplied from the absorbent liquid pump. It may include an absorbent liquid circulation tank that mixes and stores the absorbent liquid, and an absorbent liquid circulation pump that provides the absorbent liquid from the absorbent liquid circulation tank to the top of the CO ₂ removal unit and circulates it.

In addition, it further includes a seawater supply unit that supplies seawater from the outside of the ship, and the exhaust gas cooling unit is provided inside the absorption tower, wherein the absorption tower is the exhaust gas cooling unit, and the exhaust gas is supplied from the seawater supply unit. _It further _{includes a SO} CO ₂ can be captured by converting it to an aqueous solution.

In addition, it further includes a seawater supply unit that supplies seawater from the outside of the ship, and the absorption tower further includes _{a NO} However, the exhaust gas _from which _NO This allows CO ₂ to be captured.

In addition, it further includes a seawater supply unit that supplies seawater from the outside of the ship, and the exhaust gas cooling unit is provided inside the absorption tower, wherein the absorption tower includes _{a NO} As the exhaust _gas cooling unit, the _exhaust gas _from which the _NO The CO ₂ removal unit, which removes CO ₂ by reacting the exhaust gas with the absorption liquid from the absorption liquid circulation supply unit and converting it into an aqueous carbonate solution and collecting the carbonate solution, may be formed by sequentially stacking them.

In addition, the absorption liquid regeneration unit includes a regeneration reactant storage tank for storing the regeneration reactant, a transfer pump for pumping and transporting the carbonate aqueous solution, and a mixture and reaction of the regeneration reactant and the carbonate aqueous solution to regenerate the absorption liquid, and the solid phase. It may include a mixing tank that generates carbonate and returns the regenerated absorption liquid to the absorption tower.

In addition, the exhaust gas cooling unit branches and cools at least a portion of the exhaust gas discharged from the marine engine, and the CO ₂ removal unit reacts the cooled exhaust gas with the absorption liquid to convert CO ₂ into the carbonate aqueous solution. This allows CO ₂ to be captured.

Meanwhile, another embodiment of the present invention provides a ship equipped with the above-described ship greenhouse gas emission reduction device.

At this time, the vessel may be a VLCC.

According to the present invention, when storing onboard a ship, the sediment storage tank is arranged according to the arrangement of the regeneration reactant storage tank to facilitate overboard discharge and unloading of the sediment, or to discharge overboard the carbonate separated by the separator using seawater. By washing with fresh water, corrosion of the separator caused by seawater can be prevented, and environmental pollution can be reduced by mineralizing greenhouse gases. By discharging materials that collect greenhouse gases into the ocean, separate storage and unloading facilities are required. _{It is unnecessary , removes NO} (NH ₄ ) ₂ CO ₃ and NH ₄ HCO ₃ can be stored in _a solid state with few impurities, and _by removing CO ₂ after removing _SO It has the effect of increasing CO ₂ removal efficiency.

Figure 1 shows a schematic diagram of a ship's greenhouse gas emission reduction device according to the present invention.
Figures 2 and 3 illustrate the arrangement structures of the absorbent liquid regeneration unit and the sediment treatment unit of the first embodiment of the greenhouse gas emission reduction device for the ship shown in Fig. 1, respectively.
Figures 4 to 6 respectively illustrate the arrangement structures of the absorbent liquid regeneration unit and the sediment treatment unit of the second embodiment of the greenhouse gas emission reduction device for the ship shown in Fig. 1.
FIGS. 7 and 8 respectively illustrate the arrangement structures of the absorbent liquid regeneration unit and the sediment treatment unit of the third embodiment of the greenhouse gas emission reduction device for the ship shown in FIG. 1.
FIGS. 9 and 10 respectively illustrate the arrangement structures of the absorbent liquid regeneration unit and the sediment treatment unit of the fourth embodiment of the greenhouse gas emission reduction device for the ship shown in FIG. 1.
Figures 11 and 12 respectively illustrate the arrangement structures of the absorbent liquid regeneration unit and the sediment treatment unit of the fifth embodiment of the greenhouse gas emission reduction device for the ship shown in Fig. 1.
Figures 13 to 15 illustrate the arrangement structures of the absorbent liquid regeneration unit and the sediment treatment unit of the sixth embodiment of the greenhouse gas emission reduction device for the ship shown in Fig. 1, respectively.
Figure 16 shows a system circuit diagram implementing the greenhouse gas emission reduction device of the ship of Figure 1.
FIG. 17 shows the seawater supply unit and absorption tower of FIG. 16 separated.
FIG. 18 shows the absorbent liquid circulation supply unit and the absorbent liquid regeneration unit of FIG. 16 separately.
Figure 19 is an isolated view of the overboard discharge part of Figure 16.
Figure 20 is an isolated view of the washing water treatment unit of Figure 16.
FIG. 21 is an exploded view of the steam generator of FIG. 16.
Figure 22 illustrates the CO ₂ removal unit of Figure 17.
Figure 23 illustrates the separation process among the processes of the overboard discharge part of Figure 16.
Figure 24 illustrates the discharge process among the processes of the overboard discharge part of Figure 16.
Figure 25 illustrates the cleaning process among the processes of the overboard discharge part of Figure 16.

Hereinafter, embodiments of the present invention having the above-described features will be described in more detail with reference to the attached drawings.

The ship's greenhouse gas emission reduction device according to an embodiment of the present invention includes an absorbent fluid circulation supply unit 120 that provides and circulates an absorbent fluid that absorbs CO ₂ , and an exhaust gas cooling device that cools the exhaust gas discharged from the ship engine 10. Absorption unit 132, which is formed inside the engine casing 20 and includes a CO ₂ removal unit 131 that reacts the cooled exhaust gas and the absorption liquid to convert CO ₂ into an aqueous carbonate solution and collect CO ₂ The regeneration reactant of the regeneration reactant storage tank 141 provided in the tower 130, the engine casing 20, or the upper deck is reacted with the carbonate aqueous solution in the mixing tank 143 to regenerate the absorbent liquid and produce a precipitate. It includes a regeneration unit 140 and a sediment disposal unit 150 that separates the sediment and discharges the sediment overboard by seawater when discharging overboard, and stores the sediment in the sediment storage tank 157 when storing onboard. The point is to arrange the sediment storage tank 157 according to the arrangement of the regeneration reactant storage tank 141 to facilitate overboard discharge and unloading of the sediment.

Here, depending on the type and specifications of the ship engine (low-pressure engine or high-pressure engine) used as the main engine or power generation engine, and the type of fuel supplied to the ship engine (HFO, MDO, LNG, MGO, LSMGO, ammonia, etc.) The absorption tower may be configured to optionally include a NOx absorption unit or a SOx absorption unit, or both, in addition to the CO ₂ removal unit.

In particular, when using LNG as a fuel for ship engines, there is no need to install a separate SOx absorber as there is no SOx generation, but when using low sulfur oil (LSMGO), a trace amount of SOx may be generated, so cooling of exhaust gas and SOx An SOx absorption unit capable of simultaneously dissolving and absorbing SOx may be provided.

Hereinafter, an embodiment in which a NOx absorption unit, a SOx absorption unit as an exhaust gas cooling unit, and a CO ₂ removal unit are sequentially laminated in an absorption tower will be described, but the present invention is not limited thereto.

In particular, the exhaust gas cooling unit cools the exhaust gas discharged from the ship engine, lowering the temperature of the exhaust gas and facilitating CO ₂ absorption by the absorbent liquid. The SOx absorption unit using seawater can replace that role. Alternatively, the exhaust gas can be cooled by heat exchange with fresh water. Specifically, the heat exchange pipe (not shown) surrounding the exhaust gas discharge pipe through which the exhaust gas flows is provided from the ship's cooling system (not shown). The exhaust gas can be cooled to a temperature of 27°C to 33°C by circulating the fresh water and exchanging heat with the fresh water.

At this time, the water cooling method, which directly cools the exhaust gas with fresh water, may lower the greenhouse gas absorption performance by lowering the temperature of the absorbent liquid due to the input of fresh water. Therefore, the concentration of the absorbent liquid is lowered by cooling the exhaust gas using a heat exchange method. It is desirable to maintain a constant greenhouse gas absorption performance by preventing

With reference to the drawings below, the ship's greenhouse gas emission reduction device is described in detail as follows.

First, the seawater supply unit 110 is a component that supplies seawater to the absorption tower 130 and the sediment treatment unit 150. Specifically, as shown in FIGS. 16 and 17, it is supplied from the sea chest (sea chest) from outboard. A seawater pump 112 that sucks and supplies _seawater through 111) and pumps _it to the SO It may include a seawater control valve 113 that controls the injection amount. At this time, preferably, the seawater pump 112 may be a quenched seawater pump.

For reference, depending on when the ship is berthing or sailing, the sea water pump 112 can be selectively supplied from a high sea chest that sucks sea water in the upper part or a low sea chest that sucks sea water in the lower part depending on the water depth. That is, when a ship docks, a high seachest can be used because the upper seawater is cleaner than the lower seawater, and when a ship is sailing, a low seachest can be used because the lower seawater is cleaner than the upper seawater.

Here, the seawater control valve 113 may be a manually operated diaphragm valve or a solenoid type valve that controls the flow rate of seawater, and can adjust the seawater injection amount through the seawater injection nozzle depending on the amount of exhaust gas.

Next, the absorbent liquid circulation supply unit 120 is a component that provides the absorbent liquid for absorbing CO ₂ contained in the exhaust gas and circulates it to the absorption tower 130. Specifically, as shown in FIGS. 16 and 18, the absorbent liquid is An absorbent liquid storage tank 121 that stores the absorbent liquid, an absorbent liquid pump 122 that pumps the absorbent liquid from the absorbent liquid storage tank 121 and transfers it to the absorbent liquid circulation tank 123, and the carbonate aqueous solution discharged from the absorption tower 130 and the absorbent liquid pump. An absorbent liquid circulation tank 123 that mixes and stores the absorbent liquid supplied from (122), and an absorbent liquid circulation pump 124 that supplies and circulates the absorbent liquid from the absorbent liquid circulation tank 123 to the top of the CO ₂ removal unit 131. It can be included.

At this time, the absorption liquid may be a monovalent aqueous alkaline solution containing an aqueous LiOH (lithium hydroxide) solution, an aqueous NaOH (sodium hydroxide) solution, an aqueous KOH (potassium hydroxide) solution, or an aqueous NH ₄ OH (ammonia) solution, and is preferably an aqueous NaOH solution and /Or it may be an aqueous NH ₄ OH solution.

Here, in the first step of converting the exhaust gas into an aqueous carbonate solution by reacting the absorption liquid, which is a monovalent alkaline aqueous solution, CO ₂ of the exhaust gas reacts with water to produce H ₂ CO ₃ (carbonic acid) according to the following [Chemical Formula 1]. will be created. At this time, the water reacting with CO ₂ may be water coexisting in the monovalent aqueous alkaline solution that is the absorption liquid.

After the first step, when the monovalent alkali aqueous solution as the absorption solution is an aqueous NaOH solution, NaHCO ₃ (sodium bicarbonate), a carbonate, is obtained by the following [Formula 2]: Alternatively, Na ₂ CO ₃ (sodium carbonate) and water are produced and converted into an aqueous carbonate solution.

Alternatively, after the first step, when the monovalent aqueous alkaline solution as the absorption solution is an aqueous NH ₄ OH solution, NH ₄ HCO _{3 (} ammonium bicarbonate) or (NH ₄ ) ₂ CO _{3 (} carbonic acid), which is a carbonate, is obtained by the following [Chemical Formula 3] ammonium) and water are produced and converted into an aqueous carbonate solution.

In addition, the absorbent liquid pump 122 supplies a certain amount of absorbent liquid to fill the shortfall of the absorbent liquid since a part of the absorbent liquid is discharged overboard along with the carbonate when the carbonate of solid CaCO ₃ is separated and discharged overboard by the overboard discharge unit 150. It can be supplied to the absorption liquid circulation tank (123).

On the other hand, the absorption liquid of the NaOH aqueous solution can be generated by electrolyzing seawater and fresh water respectively and stored in the absorption liquid storage tank 121, and power is generated through reduction and oxidation of Na to produce a certain percentage of power applied for electrolysis. By supplying , some of the power required to generate NaOH(aq) can be saved.

For reference, the absorbent liquid comes into contact with the exhaust gas in the absorption tower 130, and CO ₂ is ionized in the form of ions, and the ionized absorbent liquid flows into the absorbent liquid circulation tank 123, and is discharged from the CO ₂ removal unit 131. In the case where all CO ₂ absorption by CO ₃ ^2- has occurred in the absorbed liquid, the concentration of HCO ₃ ^- ions is high, the concentration of CO ₃ ^2- is relatively small, and the temperature of the absorbed liquid is relatively high, so the sediment The amount is small and most exist in the form of ions, and as CO ₂ dissolves, the concentration of HCO ₃ ^- ions increases and can be continuously used for CO ₂ absorption until a certain concentration is reached.

Next, the absorption tower 130 cools the exhaust gas discharged from the ship engine 10 by reacting it with seawater, and reacts the cooled exhaust gas with the absorption liquid to convert CO ₂ into a carbonate aqueous solution to collect _{CO 2} Includes a removal unit 131.

For example, the absorption tower 130 serves as an exhaust gas cooling unit that cools the exhaust gas by reacting it with seawater supplied from the seawater supply unit 110, and has _{an SO} Further, the CO ₂ removal unit 131 cools the exhaust gas from which _SO CO ₂ can be captured by reacting and converting it into an aqueous carbonate solution.

Alternatively _{, the} absorption tower 130 further includes _{a NO} CO ₂ can be collected by reacting with seawater supplied from 110), cooling it, reacting the cooled exhaust gas with the absorption liquid from the absorption liquid circulation supply unit 120, and converting it into an aqueous carbonate solution.

_{Alternatively} , the absorption tower 130 has _{a NO} CO _{2 which removes} CO ₂ by reacting the _SO The removal portions 131 may be sequentially stacked.

Specifically, referring to FIG. 17, the CO ₂ removal unit 131 includes a first injection nozzle 131a that sprays the absorbent liquid supplied from the absorbent liquid regeneration unit 140, and a lower portion of the first injection nozzle 131a. A first filling (131b) that is formed and causes a primary reaction between the exhaust gas and the absorbent liquid, a second injection nozzle (131c) that sprays the absorbent liquid that is supplied from the absorbent liquid circulation supply unit 120 and circulates, and a second injection nozzle (131c). It may include a second filling (131d) that is formed at the bottom and causes a secondary reaction between the exhaust gas and the absorbent liquid.

Here, the second injection nozzle 131c may be formed to branch to the top of the first filling 131b and the second filling 131d, respectively, and spray the absorbent liquid downward.

In addition, the CO ₂ removal unit 131, as illustrated in FIG. 22, is formed at the top of the second injection nozzle 131c and has a curved multi-plate structure that forms droplets to block external discharge of the absorbent liquid. It may further include a mist removal plate 131e and a partition wall 131f or an umbrella-shaped blocking plate 131g to prevent backflow of the absorption liquid into the exhaust gas pipe.

In addition, the CO ₂ removal unit 131 includes a cooling jacket (not shown) that cools the heat generated from the first filling (131b) and the second filling (131d) to maintain the temperature of the exhaust gas at 80°C to 100°C. Alternatively, the temperature of the absorbent liquid supplied from the first injection nozzle (131a) and the second injection nozzle (131c) is lowered by 10°C to 20°C, thereby increasing the absorption rate in the heat generation process in which CO ₂ is absorbed into the absorbent liquid. It is possible to minimize loss due to evaporation of H ₂ O.

In addition, the first packing (131b) and the second packing (131d) may be formed in a multi-stage distilling column packing designed to have a large contact area per unit volume, and the contact area per unit area and Appropriate distillation column packing can be selected considering the pressure drop and flooding velocity of the gas, and a solution redistributor can be formed between the multi-stage distillation column packing to prevent channeling of the solution. there is.

In addition, the CO ₂ removal unit 131 monitors the pH corresponding to the degree of reaction in the first filling (131b) and the second filling (131d) through the pH sensor (P) to control the first injection nozzle (131a). And the injection amount of the absorbent liquid through the second injection nozzle 131c can be adjusted.

Specifically, referring to FIG _. 17, the SO It may include a multi-stage seawater injection nozzle (132b) that sprays downward to dissolve _SO

In addition, the _SO The amount of seawater sprayed by the seawater spray nozzle (132b) can be adjusted according to the amount or measured temperature.

In addition, in the passage 132a, holes through which exhaust gas passes are arranged in a staggered manner and a plurality of laminated plates arranged vertically and spaced apart, a structure forming a curved passage, or an absorber filled with filler are formed to increase the contact area between seawater and exhaust gas. can be increased to facilitate cooling and absorption, and a partition wall 132c or an umbrella-shaped blocking plate 132d can be formed to prevent backflow of the washing water.

_{Accordingly , SO ​ ​ ​ ​} By solving the problem that it is difficult to remove CO ₂ until all of _X is dissolved, the removal efficiency of CO ₂ can be improved.

For _{reference ,} the _washing water drained from _the ^bottom _{of the SO} .

Meanwhile, _the NO It may include a urea water supply pump (133b) that supplies water to the injection nozzle inserted at the bottom of the SCR (133c).

In addition, it may further include an EGE (134 ₎ formed between the _NO

In addition, as shown in FIG. 17, the absorption tower 130 diverts (branchs) at least a portion of the exhaust gas discharged from the ship engine 10 and cools it by reacting with seawater, and reacts the cooled exhaust gas with the absorption liquid. _{CO 2 can} be captured by converting it into an aqueous carbonate solution.

That is, it is provided with a blowing means (not shown) that diverges at least a portion of the exhaust gas and supplies it to the _SO The absorption tower 130 can be designed to minimize its diameter and increase its height to overcome limitations in installation space.

Here, the blowing means may be configured as a blower, and the blower is designed _to blow or pressurize exhaust gas at 40°C to 50°C when the _SO If (132) is not installed, it is desirable to design it to blow or pressurize exhaust gas around 300°C.

At this time, among the exhaust gas discharged from the ship engine, the remaining exhaust gas that is not branched to the absorption tower 130 is discharged through the main exhaust pipe, and at least some of the exhaust gas branched to the absorption tower 130 is discharged after CO ₂ is collected. It can be discharged by joining the main exhaust pipe, or it can be discharged through a separate discharge pipe.

Next, the absorbent liquid regeneration unit 140 reacts the carbonate aqueous solution with a divalent metal oxide or divalent metal hydroxide to regenerate the absorbent liquid and generate a precipitate.

Specifically, referring to FIG. 18, the absorption liquid regeneration unit 140 includes a regeneration reactant storage tank 141 for storing regeneration reactants of divalent metal oxide (CaO) or divalent metal hydroxide (Ca(OH) ₂ ). , a transfer pump 142 that pumps the carbonate aqueous solution from the absorption liquid circulation tank 123 and transfers it to the mixing tank 143, and the absorption liquid is regenerated by mixing and reacting the regeneration reactant with the carbonate aqueous solution, and solid carbonate A mixing tank 143 for generating (CaCO ₃ (s)) and returning the regenerated absorption liquid to the absorption tower 130 for reuse, and a mixing tank 143 for regenerating the regenerated reactant from the regenerated reactant storage tank 141. It may include a dosing room 144 for injection.

First, when NaOH and CO ₂ react to produce carbonate NaHCO ₃ (sodium hydrogen carbonate) or Na ₂ CO ₃ (sodium carbonate), carbonate NaHCO ₃ (sodium hydrogen carbonate) or Na ₂ CO ₃ (sodium carbonate) It reacts with CaO (calcium oxide) using the following [Formula 4] to generate carbonate CaCO ₃ while regenerating NaOH, or reacts with Ca(OH) ₂ (calcium hydroxide) using the following [Formula 5] to produce NaOH. During regeneration, carbonate CaCO ₃ is produced.

Alternatively, when NH ₄ OH and CO ₂ react to produce NH ₄ HCO ₃ (ammonium bicarbonate) or (NH ₄ ) ₂ CO ₃ (ammonium carbonate), the carbonate NH ₄ HCO ₃ (ammonium bicarbonate) or (NH ₄ ) ₂ CO ₃ (ammonium carbonate) reacts with CaO (calcium oxide) according to the following [Formula 6] to generate carbonate CaCO ₃ while regenerating NaOH, or CaCO 3 is produced according to the following [Formula 7] It reacts with (OH) ₂ (calcium hydroxide) to generate carbonate CaCO ₃ while regenerating NaOH.

Here, when the HCO ₃ ^- ion concentration in the absorbent liquid circulation tank 123 increases, the absorbent liquid is transferred to the mixing tank 143 through the transfer pump 142, and CO ₂ is continuously released even during the mineralization process in the subsequent process. The absorbent liquid can be transferred at a concentration that can be absorbed.

In addition, the mixing tank 143 reacts the absorption liquid in which CO ₂ is ionized with CaO or Ca(OH) ₂ to regenerate the absorption liquid, converting CO ₂ into the form of CaCO ₃ , and performing the reaction in [Formula 4] to [Formula 7] Through the reaction, OH ^- ions are supplied from CaO or Ca(OH) ₂ , and CO ₃ ^- ions combine with Ca ₂ ⁺ ions to produce solid, insoluble CaCO ₃ .

Meanwhile, depending on the arrangement structure of the regeneration reactant storage tank 141 and the sediment storage tank 157 of the above-described ship's greenhouse gas emission reduction device, they can be divided into the first to sixth embodiments, respectively, refer to the corresponding drawings. Each embodiment is described in detail as follows.

First, FIGS. 2 and 3 respectively illustrate the arrangement structures of the absorbent liquid regeneration unit and the sediment treatment unit of the first embodiment of the greenhouse gas emission reduction device for the ship shown in FIG. 1.

The absorption liquid regeneration unit 140 mixes the regeneration reactant supplied from the regeneration reactant storage tank 141 provided on the port side of the engine casing 20 and the carbonate aqueous solution discharged from the absorption tower 130 into the mixing tank 143. ), the absorption liquid is regenerated and a precipitate is generated.

Here, as illustrated in FIG. 3, the regeneration reactant storage tank 141 is close to the CO ₂ removal unit 131 inside the engine casing 20, and the dosing line connected to the dosing room 144 is It can be easily placed with minimal interference, and multiple filling lines for filling the regeneration reactant into the regeneration reactant storage tank 141 can be placed on only one side to minimize interference.

In addition, the mixing tank 143 and the dosing room 144 can be placed at the bottom of the regeneration reactant storage tank 141, and the bottom of the regeneration reactant storage tank 141 has a silo structure and communicates with the dosing room 144. It can be.

Next, the sediment treatment unit 150 separates the sediment of CaCO ₃ (s), discharges the sediment overboard by seawater when discharging overboard, stores the sediment in the sediment storage tank 157 when storing it onboard, and stores the sediment in the ocean. It is discharged overboard with seawater in the form of sediment that is basically contained in the environment and washed with fresh water.

That is, the sediment treatment unit 150 includes a separation process of sediment and absorption liquid along the path (P1) indicated in FIG. 23, a process of discharging sediment by seawater along the path (P2) indicated in FIG. 24, and a process of discharging sediment by seawater along the path (P2) indicated in FIG. 25. The cleaning process (cleaning) with fresh water can be performed sequentially along the path (P3) indicated in .

Meanwhile, the sediment treatment unit 150 sucks and separates the sediment and absorbent liquid from the absorbent fluid regeneration unit 140, dilutes the sediment with seawater and discharges it overboard so that the sediment satisfies the overboard discharge conditions, and If the requirements are not met, the sediment can be temporarily stored in a separate storage tank (not shown).

For example, the sediment treatment unit 150 includes sensors (not shown) for measuring the turbidity, pH, and oil content of the sediment separated from the separator 152, and satisfies the overboard discharge conditions corresponding to the values measured by the sensors. Depending on availability, it can be discharged overboard or temporarily stored.

Specifically, referring to FIG. 19, the sediment treatment unit 150 includes a separation pump 151 that sucks the sediment and absorbent liquid from the absorbent liquid regeneration unit 140, and separates the sediment and absorbent liquid transferred from the separation pump 151. Thus, the sediment is discharged overboard and the absorbent liquid is returned to the absorbent liquid circulation supply unit 120, and a separator 152, and a discharge dissolved water pump that supplies cooled seawater to the separator 152 to dilute the sediment and discharge it overboard. It may include (153) and a cooling dissolved water pump 154 that supplies cooling dissolved water from the sea chest 111 to the discharge dissolved water pump 153.

Here, the separator 152 may be a filter-type separator or a centrifugal separator that separates the sediment and the absorbent liquid from each other.

In addition, the sediment treatment unit 150 further includes a fresh water supply valve 155 that supplies fresh water to the separator 152 to clean the separator 152, preventing corrosion by seawater and mixing of seawater with the regenerated absorbent liquid. You can do it.

In addition, the sediment treatment unit 150 further includes a fresh water cooler 156 that cools the seawater supplied to the discharge dissolved water pump 153 into cooled fresh water, so that the sediment discharged from the separator 152 is treated with fresh water cooler 156. Cooled seawater can be supplied, diluted, and discharged overboard.

In addition, as illustrated in FIGS. 2 and 3, the sediment storage tank 157 is disposed on the starboard side of the engine casing 20, and is used to provide a provision crane when discharging the sediment of CaCO ₃ overboard. It can be easily processed using a crane, and the engine casing (20) and sediment storage tank (157) are integrated so that visibility, smoke behavior, etc. can be secured without affecting the existing arrangement.

Additionally, the sediment in the sediment storage tank 157 can be unloaded through offshore barge operations.

Second, FIGS. 4 to 6 illustrate the arrangement structures of the absorbent liquid regeneration unit and the sediment treatment unit of the second embodiment of the greenhouse gas emission reduction device of the ship shown in FIG. 1, respectively.

The absorbent liquid regeneration unit 140 mixes the regeneration reactants from a pair of regeneration reactant storage tanks 141 separately provided on the port side and the starboard side of the engine casing 20 with the carbonate aqueous solution discharged from the absorption tower 130. By reacting in the tank 143, the absorption liquid is regenerated and a precipitate is generated.

Here, as illustrated in FIGS. 4 and 5, the regenerated reactant storage tank 141 is close to the CO ₂ removal unit 131 inside the engine casing 20, and the dosing line connected to the dosing room 144 interferes. It can be easily deployed by minimizing .

In addition, as illustrated in FIG. 5, the mixing tank 143 and the dosing room 144 can be placed separately at the bottom of the regeneration reactant storage tank 141, so that one of the regeneration reactant storage tanks 141 and Even in the event of a failure of the mixing tank 143 and the dosing room 144, the CO ₂ removal unit 131 is provided through the extra regenerated reactant storage tank 141, the mixing tank 143, and the dosing room 144. The function can be performed, and the bottom of the regeneration reactant storage tank 141 has a silo structure and can communicate with the dosing room 144.

Additionally, the bottom of the regeneration reactant storage tank 141 may have a silo structure.

The sediment disposal unit 150 separates the sediment and discharges the sediment overboard with seawater when discharging overboard, and stores the sediment in the sediment storage tank 157 when storing onboard.

Here, as illustrated in FIG. 6, the sediment storage tank 157 can be placed in the stern tank (AP (After Peak) tank) located at the very tip, so that it can replace the stern tank without a relatively large increase in weight. , when discharging sediment from the sediment storage tank 157 to the sea, the discharge line can be arranged short.

Third, FIGS. 7 and 8 respectively illustrate the arrangement structures of the absorbent liquid regeneration unit and the sediment treatment unit of the third embodiment of the greenhouse gas emission reduction device for the ship shown in FIG. 1.

The absorbent liquid regeneration unit 140 mixes the regeneration reactant from a pair of regeneration reactant storage tanks 141 separately provided on the port side and the starboard side of the engine casing 20 with the carbonate aqueous solution discharged from the absorption tower 130. By reacting in the tank 143, the absorption liquid is regenerated and a precipitate is generated.

As illustrated in FIGS. 7 and 8, the regeneration reactant storage tank 141 is close to the CO ₂ removal unit 131 inside the engine casing 20, so that the dosing line connected to the dosing room 144 minimizes interference. So it can be easily deployed.

In addition, as illustrated in FIG. 7, the mixing tank 143 and the dosing room 144 can be placed separately at the bottom of the regeneration reactant storage tank 141, so that one of the regeneration reactant storage tanks 141 and Even in the event of a breakdown of the mixing tank 143 and the dosing room 144, the CO ₂ removal unit 131 performs its function through the extra regenerated reactant storage tank 141, the mixing tank 143, and the dosing room 144. It can be done, and the lower part of the regeneration reactant storage tank 141 may have a silo structure and communicate with the dosing room 144.

The sediment disposal unit 150 separates the sediment and discharges it overboard by seawater when discharging it overboard. Referring to FIG. 8, when storing it onboard, it is separated into the port side and starboard side of the upper deck. The sediment is stored in a pair of sediment storage tanks (157) arranged in an appropriate manner.

Here, when discharging the sediment of CaCO ₃ overboard, it can be easily treated using a provisioning crane, and it is composed of a pair of sediment storage tanks (157) and the corresponding separator (152), so that even in the event of failure of either one, it functions through a spare. can be performed.

In addition, the sediment treatment unit 150 sucks and separates the sediment and the absorbent liquid from the absorbent liquid regeneration unit 140, dilutes the sediment with seawater and discharges it overboard so that the sediment satisfies the overboard discharge conditions, and discharges the sediment overboard. If it is not met, the sediment can be temporarily stored in the sediment storage tank 157, and the sediment in the sediment storage tank 157 can be unloaded through sea barge operations.

Fourth, FIGS. 9 and 10 respectively illustrate the arrangement structures of the absorbent liquid regeneration unit and the sediment treatment unit of the fourth embodiment of the greenhouse gas emission reduction device for the ship shown in FIG. 1.

The absorbent liquid regeneration unit 140 reacts the regeneration reactant and the carbonate aqueous solution in the regeneration reactant storage tank 141, which is separately provided on the port side and the starboard side of the engine casing 20, in the mixing tank 143 to produce the absorbent liquid. Regenerate and produce sediment.

In addition, as illustrated in FIGS. 9 and 10, the mixing tank 143 and the dosing room 144 can be separately disposed at the bottom of the regeneration reactant storage tank 141, so that either regeneration reactant storage tank ( Even in the event of a breakdown of the mixing tank 143 and the dosing room 144, the CO ₂ removal unit 131 is maintained through the extra regenerated reactant storage tank 141, the mixing tank 143, and the dosing room 144. The function can be performed, and the bottom of the regeneration reactant storage tank 141 has a silo structure and can communicate with the dosing room 144.

The sediment disposal unit 150 separates the sediment and discharges the sediment overboard by seawater when discharging overboard, and when storing onboard the sediment storage tank ( 157) to store the sediment.

Here, as illustrated in FIG. 10, the sediment storage tank 157 is arranged in a structure connected between the engine casing 20 and the residential equipment 30, so there may be an advantage in vibration and the sediment of CaCO ₃ When discharging overboard, it can be easily handled using a provisioning crane.

In addition, compared to the sediment storage tank 157 of the first to third embodiments, the sediment storage tank 157 is disposed biased toward the bow direction, which may be advantageous for trim.

Fifth, FIGS. 11 and 12 respectively illustrate the arrangement structures of the absorbent liquid regeneration unit and the sediment treatment unit of the fifth embodiment of the greenhouse gas emission reduction device for the ship shown in FIG. 1.

The absorbent liquid regeneration unit 140 reacts the regeneration reactant and the carbonate aqueous solution in the regeneration reactant storage tank 141, which is separately provided on the port side and the starboard side of the engine casing 20, in the mixing tank 143 to produce the absorbent liquid. Regenerate and produce sediment.

In addition, as illustrated in FIGS. 11 and 12, the mixing tank 143 and the dosing room 144 can be separately disposed at the bottom of the regeneration reactant storage tank 141, so that either regeneration reactant storage tank ( Even in the event of a breakdown of the mixing tank 143 and the dosing room 144, the CO ₂ removal unit 131 is maintained through the extra regenerated reactant storage tank 141, the mixing tank 143, and the dosing room 144. The function can be performed, and the bottom of the regeneration reactant storage tank 141 has a silo structure and can communicate with the dosing room 144.

The sediment disposal unit 150 separates the sediment and discharges the sediment overboard by seawater when discharging overboard, and stores the sediment in the sediment storage tank 157 disposed on the stern side of the engine casing 20 when stored onboard. Let's do it.

In addition, the sediment in the sediment storage tank 157 is withdrawn through the upper deck of the stern, more specifically, the upper deck for ship mooring, making it easy to dispose of the sediment and expanding the sediment storage capacity.

Sixth, FIGS. 13 to 15 respectively illustrate the arrangement structures of the absorbent liquid regeneration unit and the sediment treatment unit of the sixth embodiment of the greenhouse gas emission reduction device for the ship shown in FIG. 1.

The absorbent liquid regeneration unit 140 reacts the regeneration reactant and the carbonate aqueous solution in a pair of regeneration reactant storage tanks 141 separately provided on the port side and the starboard side of the upper deck in the mixing tank 143 to produce the absorbent liquid. Regenerate and produce sediment.

In addition, the mixing tank 143 and the dosing room 144 can be placed separately at the bottom of the regenerated reactant storage tank 141, so that the regenerated reactant storage tank 141, the mixing tank 143, and the dosing room on either side Even in the event of failure of (144), the CO ₂ removal unit 131 can perform its function through the extra regeneration reactant storage tank 141, mixing tank 143, and dosing room 144, and storage of regeneration reactants. The lower end of the tank 141 has a silo structure and can be communicated with the dosing room 144.

In addition, referring to FIGS. 14 and 15, the regeneration reactant storage tank 141 is arranged separately on the port side and the starboard side of the upper deck, so that the upper part of the regeneration reactant storage tank 141 is located at the upper deck level. Therefore, the filling operation of the regenerated reactant can be easily performed.

The sediment disposal unit 150 separates the sediment and discharges the sediment overboard with seawater when discharging overboard, and stores the sediment in the sediment storage tank 157 when storing onboard.

In addition, the sediment storage tank 157 can be placed in the stern tank located at the extreme aft part, so that it can replace the stern tank without a relatively large increase in weight, and the sediment in the sediment storage tank 157 is discharged when discharged to the sea. Lines can be placed short.

Next, as shown in FIG. 20, the washing water treatment unit 160 stores the washing water discharged from the absorption tower 130, the washing water tank 161, and the washing water transferred from the washing water tank 161. It includes a water treatment device 162 equipped with a filtering unit for controlling turbidity to meet overboard discharge conditions and a neutralizer injection unit for pH adjustment, and a sludge storage tank 163 for separating and storing solid discharge.

Next, as shown in FIG. 17 _, an EGE 134 formed between the _NO Specifically, as shown in FIG. 21, the steam generator 170 receives a mixture of heat-exchanged steam and saturated water through the EGE 134 and generates the mixture by a steam drum (not shown). An auxiliary boiler (171) that separates steam and supplies it to steam consumers on board, a boiler water circulating water pump (172) that circulates and supplies boiler water from the auxiliary boiler (171) to the EGE (134), and A cascade tank (173) that recovers the condensate that has changed its phase after being condensed, a supply pump (174) that adjusts the amount of boiler water and supplies it from the cascade tank (173) to the auxiliary boiler (171), and a control valve ( 175), which generates and supplies the steam needed for the heating equipment within the ship.

Here, when the load of the ship engine 10 is large, the amount of heat that can be provided from the exhaust gas is high, so the amount of steam needed within the ship can be sufficiently produced through the EGE (134), but if this is not the case, the auxiliary boiler (171) itself The necessary steam can also be produced by burning fuel.

Meanwhile, another embodiment of the present invention provides a ship, particularly a VLCC (Very Large Crude Oil), equipped with a greenhouse gas emission reduction device for the ships listed above.

Therefore, according to the configuration of the embodiment of the present invention, the sediment storage tank is arranged according to the arrangement of the regeneration reactant storage tank during onboard storage to facilitate overboard discharge and unloading of the sediment, or the carbonate separated by the separator is stored in seawater. It can be discharged overboard using a _{Storage and unloading} facilities _are unnecessary _{, NO} (NH ₄ ) ₂ CO ₃ and NH ₄ HCO ₃ can be stored in _a solid state with few impurities, and _by removing CO ₂ after removing _SO and CO ₂ removal efficiency can be increased.

The embodiments described in this specification and the configuration shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent the entire technical idea of the present invention, so various equivalents may be substituted for them at the time of filing the present application. It should be understood that variations and variations may exist.

110: Seawater supply unit 111: Sea chest
112: Seawater pump 113: Seawater control valve
120: Absorbent liquid circulation supply unit 121: Absorbent liquid storage tank
122: Absorbent liquid pump 123: Absorbent liquid circulation tank
124: absorption liquid circulation pump 130: absorption tower
131: CO ₂ removal unit 132: _SO
133: _NO
140: Absorbent liquid regeneration unit 141: Regeneration reactant storage tank
142: transfer pump 143: mixing tank
144: Dosing room 150: Sediment disposal unit
151: Separation pump 152: Separator
153: Discharge sea water pump 154: Cooling sea water pump
155: Fresh water supply valve 156: Fresh water cooler 157: Sediment storage tank 160: Washing water treatment unit
161: Washing water tank 162: Water treatment device
163: Sludge storage tank 170: Steam generation unit
171: Auxiliary boiler 172: Boiler water circulating water pump
173: Cascade tank 174: Supply pump
175: Control valve

Claims (25)

An absorbent liquid circulation supply unit that provides and circulates an absorbent liquid that absorbs CO ₂ ;
An exhaust gas cooling unit that cools the exhaust gas discharged from the ship engine;
An absorption tower formed inside the engine casing and including a CO ₂ removal unit that reacts the cooled exhaust gas and the absorption liquid to convert CO ₂ into an aqueous carbonate solution and collect CO ₂ ;
An absorbent liquid regeneration unit that reacts the carbonate aqueous solution with the regenerated reactant of the regenerated reactant storage tank provided separately on the port side and the starboard side of the engine casing in a mixing tank to regenerate the absorbent liquid and generate a precipitate; and
A sediment disposal unit that separates the sediment, discharges the sediment overboard by seawater when discharging overboard, and stores the sediment in a sediment storage tank when stored onboard.
A ship's greenhouse gas emission reduction device. According to claim 1,
The mixing tank is,
Characterized in that they are arranged separately at the bottom of the regeneration reactant storage tank,
A ship's greenhouse gas emission reduction device. According to claim 1,
The sediment storage tank is characterized in that it is placed in the stern tank,
A ship's greenhouse gas emission reduction device. According to claim 1,
The bottom of the regeneration reactant storage tank is characterized in that it has a silo structure,
A ship's greenhouse gas emission reduction device. According to claim 1,
The absorption liquid is a monovalent aqueous alkaline solution and includes any one of an aqueous LiOH solution, an aqueous NaOH solution, an aqueous KOH solution, and an aqueous NH ₄ OH solution,
The regeneration reactant is Ca(OH) ₂ or CaO,
Characterized in that the precipitate is CaCO ₃ ,
A ship's greenhouse gas emission reduction device. According to claim 1,
The sediment disposal unit, when discharging overboard,
Characterized by performing a separation process of the sediment and the absorbent liquid, a discharge process of the sediment with sea water, and further performing a washing process with fresh water,
A ship's greenhouse gas emission reduction device. According to claim 6,
The sediment disposal unit, when discharging overboard,
The sediment and the absorbent liquid from the absorbent liquid regeneration unit are sucked and separated, the sediment is diluted with seawater and discharged overboard so that the sediment satisfies the overboard discharge conditions, and if the sediment does not meet the overboard discharge conditions. If this is not possible, characterized in that the sediment is temporarily stored,
A ship's greenhouse gas emission reduction device. According to claim 7,
The sediment disposal unit is for overboard discharge,
a separation pump that sucks the sediment and the absorbent liquid from the absorbent liquid regeneration unit;
A separator that separates the sediment and the absorption liquid transferred from the separation pump, discharges the sediment overboard, and returns the absorption liquid to the absorption liquid circulation supply unit, and
Characterized in that it includes a discharge dissolved water pump that supplies the seawater to the separator to dilute the sediment and discharge it overboard.
A ship's greenhouse gas emission reduction device. According to claim 8,
The separator is,
Characterized in that it is a filter-type separator or centrifuge-type separator that separates the sediment and the absorbent liquid from each other.
A ship's greenhouse gas emission reduction device. According to claim 8,
The sediment treatment unit,
Characterized in that it further comprises a fresh water supply valve that supplies the fresh water to the separator to clean the separator.
A ship's greenhouse gas emission reduction device. According to claim 10,
The sediment treatment unit,
Characterized in that it further comprises a fresh water cooler that cools the sea water supplied to the discharge dissolved water pump with cooling fresh water,
A ship's greenhouse gas emission reduction device. According to claim 11,
Characterized in that cooled seawater is supplied to the sediment discharged from the separator through the fresh water cooler to dilute it and discharge it overboard.
A ship's greenhouse gas emission reduction device. According to claim 7,
The sediment treatment unit,
Including a sensor for measuring any one or more of turbidity, pH, and oil content of the sediment separated from the separator, it is discharged overboard, or temporarily, depending on whether the overboard discharge conditions corresponding to the measured value by the sensor are met. Characterized by storing,
A ship's greenhouse gas emission reduction device. According to claim 1,
It further includes a seawater supply unit that supplies seawater from outside the ship,
The exhaust gas cooling unit,
Characterized in that the exhaust gas discharged from the ship engine is cooled by reacting with the seawater supplied from the seawater supply unit,
A ship's greenhouse gas emission reduction device. According to claim 1,
The exhaust gas cooling unit,
Characterized in that the exhaust gas discharged from the ship engine is cooled by reacting with fresh water,
A ship's greenhouse gas emission reduction device. According to claim 1,
The exhaust gas cooling unit,
Characterized in that the exhaust gas is cooled by circulating fresh water provided from the onboard cooling system through a heat exchange pipe surrounding the exhaust gas discharge pipe.
A ship's greenhouse gas emission reduction device. According to claim 1,
Characterized in that the exhaust gas cooling unit is provided inside the absorption tower,
A ship's greenhouse gas emission reduction device. According to claim 1,
The absorbent liquid circulation supply unit,
An absorbent liquid storage tank for storing the absorbent liquid,
An absorbent liquid pump that pumps and transfers the absorbent liquid from the absorbent liquid storage tank;
An absorption liquid circulation tank for mixing and storing the carbonate aqueous solution discharged from the absorption tower and the absorption liquid supplied from the absorption liquid pump, and
Characterized in that it includes an absorbent liquid circulation pump that supplies the absorbent liquid from the absorbent liquid circulation tank to the top of the CO ₂ removal unit and circulates it.
A ship's greenhouse gas emission reduction device. According to claim 1,
It further includes a seawater supply unit that supplies seawater from outside the ship,
The exhaust gas cooling unit is provided inside the absorption tower,
The absorption tower is,
The exhaust gas cooling unit further includes _{a SO}
The CO ₂ removal unit,
Characterized in that CO ₂ is captured by reacting the cooled exhaust gas from which _SO
A ship's greenhouse gas emission reduction device. According to claim 1,
It further includes a seawater supply unit that supplies seawater from outside the ship,
The absorption tower is,
Further comprising _{a NO}
The exhaust gas cooling unit is provided inside the absorption tower, and cools the exhaust gas from which _NO
The CO ₂ removal unit,
Characterized in that CO ₂ is captured by reacting the cooled exhaust gas with the absorption liquid from the absorption liquid circulation supply unit and converting it into an aqueous carbonate solution.
A ship's greenhouse gas emission reduction device. According to claim 1,
It further includes a seawater supply unit that supplies seawater from outside the ship,
The exhaust gas cooling unit is provided inside the absorption tower,
The absorption tower is,
_{a NO}
As the exhaust _gas cooling unit, _{an SO}
Characterized in that the CO ₂ removal unit, which removes CO ₂ by reacting the cooled exhaust gas from which _SO
A ship's greenhouse gas emission reduction device. According to claim 1,
The absorbent liquid regeneration unit,
A regeneration reactant storage tank for storing the regeneration reactant,
A transfer pump that pumps and transfers the carbonate aqueous solution, and
Characterized in that it comprises a mixing tank that mixes and reacts the regenerated reactant and the carbonate aqueous solution to regenerate the absorption liquid, generates solid carbonate, and returns the regenerated absorption liquid to the absorption tower.
A ship's greenhouse gas emission reduction device. According to claim 1,
The exhaust gas cooling unit,
Cooling by branching at least a portion of the exhaust gas discharged from the marine engine,
The CO ₂ removal unit,
Characterized in that CO ₂ is captured by reacting the cooled exhaust gas with the absorption liquid to convert CO ₂ into the carbonate aqueous solution.
A ship's greenhouse gas emission reduction device. A ship equipped with a ship's greenhouse gas emission reduction device according to any one of claims 1 to 23. According to claim 24,
The ship is a VLCC (Very Large Crude Oil Carrier).