KR102232587B1 - Apparatus for reducing greenhouse gas emission in vessel and vessel including the same - Google Patents

Abstract

According to the present invention, a greenhouse gas emission reduction apparatus for a vessel is disclosed. The greenhouse gas emission reduction apparatus includes: a seawater supply part (110) supplying seawater; an absorption solution production part (120) producing and supplying a high-concentration CO2 absorption solution; an absorption tower (130) having a CO2 removal part (131) formed therein to remove CO2 by cooling exhaust gas discharged from a vessel engine (10) through a reaction between the exhaust gas and the seawater supplied from the seawater supply part (110), and converting CO2 into an ammonium salt solution through a reaction between the cooled exhaust gas and the absorption solution production part (120); and an absorption solution regeneration part comprising a first generation part (140) primarily regenerating the absorption solution through a reaction between the ammonium salt solution discharged from the abruption tower (130) and a bivalent metal hydroxide solution, and a second regeneration part (150) secondarily regenerating the high-concentration absorption solution through a reaction between a nonreacted ammonium salt solution from the primary regeneration end (140) and the bivalent metal hydroxide solution and circulating and supplying the absorption solution into the absorption tower (130) such that the ammonium salt solution can be reused as an absorption solution. Therefore, the present invention is capable of preventing a deterioration in absorption performance by increasing the recovery rate of the absorption solution and maintaining the same at a predetermined concentration.

Description

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

The present invention comprises two or more stages of the absorption liquid regeneration unit to remove the unreacted ammonium salt aqueous solution remaining in the ammonia water to maintain the ammonia water concentration at a certain level, thereby increasing the recovery rate of the absorption liquid and preventing the reduction of greenhouse gas absorption performance. , To a ship's greenhouse gas emission reduction device and a ship equipped with the device.

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

Accordingly, a series of technologies related to the capture and storage of carbon dioxide, which is a representative greenhouse gas, do not emit carbon dioxide capture and storage (CCS) technology, which has recently attracted great attention. Among CCS technologies, chemical absorption is It is the most commercialized technology among them in terms of being capable of large-scale processing.

In addition, carbon dioxide emissions regulation for regulation through the EEDI of the IMO, in 2050 and aims to more than 50% reduction of 2008 emissions in 2030 should reduce the 40% of 2008 emissions because it does not emit CO ₂ In addition, the technology to capture the _{emitted CO 2 is attracting attention.}

For reference, among the CCS technologies that directly capture and store carbon dioxide, the CO ₂ capture technology can _{be approached in various ways depending on the CO 2} generation conditions of the target process. Currently, representative technologies are absorption method, adsorption method, and membrane separation method. The wet absorption method has high technical maturity in onshore plants and is the closest capture technology to commercialization of CCS technology due _{to its high technical maturity and easy mass treatment of CO 2. As absorbents, amines and ammonia are mainly used.}

On the other hand, the aforementioned technology to reduce the emission of carbon dioxide or to capture the generated carbon dioxide is currently not commercialized in ships, and a method using hydrogen or ammonia as a fuel is currently being developed and is at the stage of commercialization. It wasn't too early.

In addition, among the exhaust gases emitted from ship engines, CO ₂ , which is a greenhouse gas, is absorbed as an absorbing liquid and converted into a substance that does not affect the environment, or it is converted into a useful substance and stored, and absorption performance decreases due to a change in the concentration of the absorbent liquid. There is a need to apply the technology to ships, which can prevent this.

Korean Registered Patent Publication No. 2031210 (Ship exhaust gas reduction device and pollutant removal method, 2019.10.11) Korean Registered Patent Publication No. 1201426 (Greenhouse gas reduction device for ships, 2012.11.14)

The technical problem to be achieved by the idea of the present invention is to maintain the ammonia water concentration at a certain level by configuring the absorption liquid regeneration unit in two or more stages to remove the unreacted ammonium salt aqueous solution remaining in the ammonia water, thereby increasing the recovery rate of the absorption liquid and absorbing greenhouse gas. It is to provide a device for reducing greenhouse gas emissions of a ship and a ship equipped with the device, which can prevent this from being deteriorated.

In order to achieve the above object, the present invention, a seawater supply unit for supplying seawater; An absorbent liquid manufacturing unit for manufacturing and supplying a high concentration CO _{2 absorbent liquid;} Cooled by the sea water and the reaction supplies the exhaust gas from the water supply portion is discharged from a marine engine, and by reacting the cooled absorption liquid from the exhaust gas and the absorbing solution production unit to convert CO ₂ as an ammonium salt aqueous solution to remove the CO ₂ An absorption tower in which a _{CO 2 removal part is formed;} And a first regeneration unit for firstly regenerating the absorbent solution by reacting the aqueous ammonium salt solution discharged from the absorption tower with an aqueous divalent metal hydroxide solution, and an aqueous divalent metal hydroxide solution to the aqueous solution of unreacted ammonium salt from the first regeneration unit. It provides an apparatus for reducing greenhouse gas emissions of ships, including; an absorbent liquid regeneration unit comprising a secondary regeneration unit configured to regenerate the high-concentration absorbent liquid secondarily and circulate it to the absorption tower to reuse it as an absorbent liquid.

In addition, the absorption liquid regeneration unit may include a storage tank for storing the aqueous divalent metal hydroxide solution; _{A mixing tank for generating NH 3} (g) and carbonate by stirring an aqueous ammonium salt solution and an aqueous divalent metal hydroxide solution discharged from the absorption tower with a stirrer, and a primary for separating carbonate by sucking the solution and precipitate from the mixing tank Consisting of a filter, the primary regeneration unit; And a first absorption liquid storage tank for storing the aqueous ammonia or unreacted ammonium salt aqueous solution separated by the primary filter, and re-reacting the aqueous divalent metal hydroxide solution and the unreacted ammonium salt aqueous solution from the storage tank, and storing the first absorption liquid. Includes; a secondary regeneration unit consisting of a secondary filter for separating carbonate and high-concentration ammonia water by suctioning solution and precipitate from the tank, and a secondary absorption liquid storage tank for storing high-concentration ammonia water separated by the secondary filter. I can.

In addition, the storage capacity of the primary absorbent liquid storage tank may be at least three times the capacity of the absorbent liquid circulating between the absorption tower and the absorbent liquid regeneration unit.

In addition, the primary absorption liquid storage tank is a stirrer for reacting by stirring the divalent metal hydroxide aqueous solution and the aqueous ammonia or unreacted ammonium salt aqueous solution separated by the primary filter, and a pH sensor that measures the degree of reaction by the stirrer. It may include.

In addition, the aqueous divalent metal hydroxide solution stored in the storage tank may be _{Ca(OH) 2} or Mg(OH) _{2 generated by reacting fresh water and CaO or MgO.}

In addition, ammonia water or fresh water separated by the secondary filter is supplied to the secondary absorption liquid storage tank, or surplus fresh water additionally generated by the mixing tank relative to the total circulation fresh water is stored in the fresh water tank, Can be recycled when generating an aqueous metal hydroxide solution.

In addition, the absorption tower further includes an SOx absorption unit that dissolves and removes SOx while reacting and cooling the exhaust gas discharged from the ship engine with seawater supplied from the seawater supply _{unit, and the CO 2} removal unit removes the SOx. the exhaust gas is cooled and is reacted with the water supply from the water supply, by switching by reacting an absorbing liquid from the cooled exhaust gas and the absorbing liquid producing unit for CO ₂ as an ammonium salt aqueous solution can remove the CO _2.

In addition, the absorption tower further includes a NOx absorption unit for absorbing and removing NOx of exhaust gas discharged from the ship engine, and cooling the exhaust gas from which the NOx has been removed by reacting with seawater supplied from the seawater supply unit. by reacting an absorbing liquid from the cooled exhaust gas and the absorbing liquid producing unit may switch the CO ₂ as an ammonium salt aqueous solution to remove the CO _2.

_{In addition, the absorption tower, a NO X} absorption unit for absorbing and removing _{NO X} from the exhaust gas discharged from the ship engine _{, and cooling by reacting the exhaust gas from which the NO X} is removed with seawater supplied from the seawater supply unit. and SO _X absorbing component to remove by dissolving the SO _X, the SO _X is reacted by removing the absorbing liquid from the exhaust gas and the absorbing liquid producing unit CO ₂ removal to convert the CO ₂ with an ammonium salt solution to remove the CO ₂ added sequentially It can be formed by lamination.

Further, to return the NH ₃ reproduced by the absorbing solution reproducing section in the absorption tower, and to re-use was converted into the absorbing solution, wherein the NO _X absorbing portion when supplied to the NH ₃ reproduced by the absorbing solution reproducing section NO with NH _{3 X Or NO X} can be absorbed using urea water.

In addition, the water supply unit, and a water pump for pumping parts of the SO _X absorbed received through said chest from the outboard supplying water, adjusting the injection amount of the sea water from the sea water pump is supplied to the SO _X absorbed by the amount of exhaust gas It may include a seawater control valve;

In addition, the absorption liquid manufacturing unit, a fresh water tank for storing fresh water; A fresh water control valve for supplying fresh water from the fresh water tank; _{NH 3} reservoir for storing _{NH 3} under high pressure; An ammonia water tank for preparing and storing high-concentration ammonia water as an absorption liquid by spraying _{NH 3} supplied from _{the NH 3} reservoir to the fresh water supplied by the fresh water control valve; A pH sensor measuring the concentration of aqueous ammonia in the aqueous ammonia tank; And an ammonia water supply pump for supplying ammonia water from the ammonia water tank to the secondary absorption liquid storage tank.

In addition, an ammonia water circulation pump for circulating ammonia water from the secondary absorption liquid storage tank to the absorption tower may be further included.

In addition, it is possible to prevent evaporation loss of _{NH 3} by injecting compressed air of a predetermined pressure into the ammonia water tank.

In addition, the SO _X absorbing unit may include a multi-stage seawater injection nozzle for injecting seawater supplied from the seawater supply unit downward; And an exhaust gas inlet pipe in the form of a partition wall or an umbrella-shaped blocking plate covering the exhaust gas inlet pipe to prevent the washing water from flowing back into the exhaust gas inlet pipe.

In addition, a porous upper plate in which a flow path through which exhaust gas passes is formed is formed under the seawater injection nozzle in multiple stages, so that seawater and exhaust gas can contact each other.

In addition, an absorption tower filled with a filler for allowing seawater and exhaust gas to contact with each other is formed under the seawater injection nozzle, so that the seawater can dissolve _{SO X.}

In addition, a neutralizing agent may be added to seawater supplied to _{the SO X absorber.}

In addition, the CO ₂ removal unit may include an ammonia water spray nozzle for spraying the absorbent liquid supplied from the absorbent liquid regeneration unit downward; A filler for converting _{CO 2} into NH ₄ HCO ₃ (aq) by contacting CO ₂ with aqueous ammonia as an absorption liquid; A cooling jacket formed in multiple stages for each section of the absorption tower filled with the filler to cool heat generated by the _{CO 2 removal reaction;} Water spray that does not react with CO _{2 and collects NH 3 discharged to the outside;} A mist removal plate formed in a curved multi-plate shape to return ammonia water in the direction of the filler; A partition wall formed to prevent ammonia water from flowing back; And an umbrella-shaped blocking plate covering the exhaust gas inlet hole surrounded by the partition wall.

In addition, the filler may be composed of a multi-stage distillation column packing designed to have a large contact area per unit volume, and a solution redistributor may be formed between the distillation column packings.

In addition, the absorption tower may _{further include an EGE formed between the NO x} absorption portion and the SO _x absorption portion to exchange heat between waste heat of the ship engine and boiler water.

In addition, an auxiliary boiler that receives a mixture in the form of heat-exchanged steam and saturated water, separates the steam and supplies it to a steam consumer, a boiler water circulating water pump that circulates and supplies boiler water from the auxiliary boiler to the EGE, and consumes the steam. It may further include a cascade tank for recovering the condensed water condensed from the wife, and a steam generator including a supply pump and a control valve for adjusting and supplying the amount of boiler water from the cascade tank to the auxiliary boiler.

In addition, a washing water tank that stores washing water discharged from the absorption tower, a filtering unit that adjusts turbidity to meet the outboard discharge conditions of the washing water transferred by the transfer pump to the washing water tank, and a neutralizing agent for pH adjustment are injected. A water treatment device having a unit, and a sludge storage tank configured to separate and store solid discharges may further include a discharge unit.

On the other hand, the present invention can provide a ship equipped with a greenhouse gas emission reduction device of the above-listed ships.

According to the present invention, the absorption liquid regeneration unit is composed of two or more stages to remove the unreacted ammonium salt aqueous solution remaining in the ammonia water to maintain the ammonia water concentration at a certain level, thereby increasing the recovery rate of the absorption liquid and preventing the reduction of greenhouse gas absorption performance. There is an effect that can be.

In addition, there is an effect of preventing loss of absorbent liquid due to spontaneous evaporation of high-concentration absorbent liquid by applying a pressurization system.

Furthermore, IMO GHG emissions regulation switch to does not affect the environment to meet material by separate collection or to save by switching to the useful substances, and are reproduced and NH ₃ minimize the relatively high price of consumption of NH _3, the filter The capacity of the rear end can be reduced, and greenhouse gases can be stored in the form of carbonates that exist in their natural state to enable sea discharge, and by removing side reactions caused by SO _{X remaining during NH 3} regeneration, the loss of _{NH 3 is minimized.} There is an effect of preventing impurities from being included when recovering ammonia.

1 shows a schematic configuration diagram of an apparatus for reducing greenhouse gas emissions of a ship according to an embodiment of the present invention.
FIG. 2 is a circuit diagram of a system implementing the apparatus for reducing greenhouse gas emissions of the ship of FIG. 1.
3 is a separate view of the seawater supply unit of the apparatus for reducing greenhouse gas emission of the ship of FIG. 2.
FIG. 4 is a separate diagram illustrating an absorbent liquid manufacturing unit and an absorbent liquid regenerating unit of the apparatus for reducing greenhouse gas emission of the ship of FIG. 2.
5 is a separate view showing the absorption tower of the apparatus for reducing greenhouse gas emission of the ship of FIG. 2.
6 is a separate diagram illustrating an SO _X absorber of the absorption tower of FIG. 5.
7 is a separate view showing the steam generating unit and the discharge unit of the greenhouse gas emission reduction device of the ship of Fig. 2.
8 illustrates various fillers applied to the apparatus for reducing greenhouse gas emissions of the ship of FIG. 2.
9 illustrates an ammonia water injection nozzle applied to the apparatus for reducing greenhouse gas emission of the ship of FIG. 2.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein.

Referring to FIG. 1, the apparatus for reducing greenhouse gas emission of a ship according to an embodiment of the present invention includes a seawater supply unit 110 for supplying seawater, an absorbent solution manufacturing unit 120 for manufacturing and supplying a _{high-concentration CO 2 absorbent solution, and a ship} The exhaust gas discharged from the engine 10 is cooled by reacting with seawater supplied from the seawater supply unit 110, and the cooled exhaust gas and the absorbent solution from the absorbent solution manufacturing unit 120 are reacted _{to convert CO 2} into an aqueous ammonium salt solution. the CO ₂ remover 131 for removing the CO ₂ formed by a divalent reacted with a metal hydroxide aqueous solution of the ammonium salt solution withdrawn from the absorption tower 130, the absorbing tower 130, the first reproducing unit for reproducing the absorption liquid primarily (140), and the second regeneration of the high-concentration absorbent liquid by reacting the aqueous divalent metal hydroxide solution to the unreacted ammonium salt aqueous solution from the primary regeneration unit 140, and circulating it to the absorption tower 130 for reuse as an absorbent liquid. The summary is to increase the recovery rate of the absorbent liquid, including the absorbent liquid regenerating unit, which is formed of the regeneration unit 150, and maintain the concentration at a constant concentration to prevent a decrease in absorption performance.

Here, it is absorbed according to the type and specification of the ship engine used as the main engine or power generation engine (low pressure engine or high pressure engine), and the type of fuel supplied to the ship engine (HFO, MDO, LNG, MGO, LSMGO, ammonia, etc.). In _{addition to the CO 2} removal unit, the tower may be configured to selectively include a NOx absorption unit or an SOx absorption unit, or to include all.

Particularly, in the case of using low sulfur oil (LSMGO) as the fuel of the ship engine, an SOx absorbing unit capable of simultaneously cooling exhaust gas and absorbing and removing by dissolving SOx may be additionally provided.

Hereinafter, an embodiment in which the NOx absorber, the SOx absorber, and the CO ₂ remover are sequentially stacked on the absorption tower, but is not limited thereto. As described above, the NOx absorber and/or the SOx absorber is a ship engine and fuel. It can be determined whether or not to be equipped according to the type of.

Hereinafter, with reference to FIGS. 1 to 9, the configuration of the above-described vessel's greenhouse gas emission reduction apparatus will be described in detail as follows.

First, the seawater supply unit 110 supplies seawater to the absorption tower 130 to lower the temperature of the exhaust gas to facilitate the absorption of _{CO 2 by the absorption liquid.}

Specifically, the seawater supply unit 110, as shown in Figs. 2 and 3, is supplied by inhaling seawater through a sea chest (not shown) from the outside and absorbs SO _{X of the absorption tower 130} It may be composed of a seawater pump 111 that pumps to the unit 132 and a seawater control valve 112 that adjusts the injection amount of seawater supplied to _{the SO X absorption unit 132 according to the amount of exhaust gas.} Here, the seawater pump 111 may be divided into a suction pump that sucks seawater from the outside of the ship and a seawater transfer pump that pumps and transports _{seawater to the SO X absorption unit 132.}

For reference, depending on the ship's berthing or sailing, the seawater pump 111 is selectively selected from a high sea chest that sucks seawater from the top or a low sea chest that sucks seawater from the bottom depending on the depth of water. Can supply. That is, when the ship is berthing, the upper seawater is clean rather than the lower seawater, so the high sea chest is used, and when the ship is sailing, the lower seawater is cleaner than the upper seawater, so the low seachest can be used.

Here, the seawater control valve 112 may be a manually operated diaphragm valve or a solenoid type valve that controls the flow rate of seawater, but is not limited thereto, and seawater through the seawater injection nozzle 132a depending on the amount of exhaust gas. Any type of valve can be applied as long as the injection amount can be adjusted.

Next, the absorbent liquid manufacturing unit 120 _{reacts fresh water and NH 3} as shown in [Chemical Formula 1] to prepare high-concentration ammonia water (NH ₄ OH (aq)), which is a high-concentration CO _{2 absorbent, and stores the secondary absorbent.} It is supplied to the absorption tower 130 through the tank 153.

Specifically, as shown in Figures 2 and 4, the absorption liquid manufacturing unit 120, a fresh water tank (not shown) for storing fresh water, a fresh water control valve for supplying fresh water from the fresh water tank to the ammonia water tank 123 ( 121), by injecting the NH ₃ supplied from the NH ₃ storage 122, NH ₃ storage 122 to the fresh water to be supplied by fresh water control valve 121 to store the high pressure of the NH ₃ for storing and preparing a high-concentration aqueous ammonia Ammonia water supply pump 125 for supplying high-concentration ammonia water from the ammonia water tank 123, the pH sensor 124 for measuring the ammonia water concentration in the ammonia water tank 123, and the ammonia water tank 123 to the secondary absorption liquid storage tank 153 It can be composed of.

Ammonia water circulating parts of the absorption tower 130 and the absorbing solution regeneration there is varied the concentration and repeated driving, for example, NO is NH ₃ is supplied to the _X-absorbing unit 133, or used for removing NO _X absorbent, the absorption tower 130 _{When the NH 3} is discharged as exhaust gas through and the concentration of the ammonia water is lowered and the concentration is lowered, the absorption liquid manufacturing unit 120 transfers the high concentration of ammonia water to the ammonia water circulation line (A, see FIG. 1). By supplying, it is possible to compensate for the lowered ammonia water concentration to keep it constant at the designed ammonia water concentration.

On the other hand, the high-concentration ammonia water has a _{higher partial pressure of NH 3} (g) compared to the low-concentration ammonia water at the same temperature, so that under atmospheric pressure, NH ₃ is relatively more evaporated, resulting in an increase in loss. Therefore, in order to store high-concentration ammonia water, it is necessary _{to lower the temperature so that the solubility is high and the vapor pressure of NH 3} (g) is lowered and operate under a pressurized system.

In other words, _{in order to prevent the phenomenon that NH 3} (g) is evaporated and lost to the atmosphere, compressed air of a certain pressure is injected into the ammonia water tank 123, and the pressure in the ammonia water tank 123 is maintained at a high state to evaporate _{NH 3} Loss can be avoided.

For example, NH ₃ can be stored in a liquid state at -34°C and 8.5 bar, so by maintaining the inside of the ammonia water tank 123 at a constant pressure using 7 bar compressed air available on board, 50% concentration of ammonia water can be stored. It can be stored in the ammonia water tank (123).

In addition, a safety valve 123a for preventing overpressure of the ammonia water tank 123 may be installed.

Next, the absorption tower 130 is cooled by reacting the exhaust gas discharged from the ship engine 10 with the seawater supplied from the seawater supply unit 110, and CO ₂ of the cooled exhaust gas and the absorption liquid from the absorption liquid manufacturing unit 120 by reacting the absorbing solution of aqueous ammonia to form the ammonium salt solution, such as a CO ₂ and then the [formula 2], switch to the _{(NH 4 HCO 3 (aq)} ) CO 2 remover to remove CO ₂ (131).

Specifically, the CO ₂ removal unit 131, as shown in FIG. 3, is an ammonia water injection nozzle 131a for injecting downwardly ammonia water supplied from the secondary absorption liquid storage tank 153, CO ₂ of the exhaust gas and Cooling to cool the heat generated by the absorption reaction of _{CO 2} by forming in multiple stages in each section of the absorption tower filled with the filler (131b) that converts _{CO 2} into NH ₄ HCO ₃ (aq) by contacting the absorption liquid, ammonia water. A jacket (cooling jacket) (not shown), _{a water spray (131c) that collects NH 3} discharged to the outside without reacting with _{CO 2} , is formed in a curved multi-plate shape and is scattered when sprayed by the ammonia water spray nozzle (131a). A mist removal plate 131d for returning ammonia water in the direction of the filler 131b, _{a partition wall 131e formed so that the ammonia water that has passed through the filler 131b does not flow back to the SO X} absorbing part 132, and surrounded by the partition wall 131e. It may be composed of an umbrella-shaped blocking plate (131f) covering the exhaust gas inlet hole.

Here, the cooling jacket can be cooled to 30°C to 50°C with the most smooth material shear, so that the CO ₂ absorption rate is maintained at a certain level and NH ₃ is not vaporized and lost.

On the other hand, the CO ₂ removal unit 131 may be considered in various forms so as to increase the contact area between the exhaust gas and NH ₃ and operate within the allowable pressure drop of the exhaust pipe required by the engine specification. For example, a filler (131b) is composed of a multi-stage distillation column packing designed to have a large contact area per unit volume, and a distillation column packing suitable for the absorption process as illustrated in FIG. 8 in consideration of the contact area per unit area and the pressure drop and overflow rate of the gas. As illustrated in FIG. 9, the ammonia water injection nozzle 131a may be configured in the form of a ladder pipe (a) or a spray form (b).

In addition, the ammonia water passes downward through the filler 131b and the exhaust gas passes upward through the filler 131b to come into contact, so that a solution redistributor (not shown) may be formed between distillation column packings to prevent channeling.

In addition, the mist removal plate 131d allows the scattered ammonia water to adhere to the curved multi-plate so that the droplets become large and drain in the direction of the filler 131b by its own weight.

On the other hand, when LNG is used as fuel, there may be no generation of SOx, but when the ship engine 10 uses low sulfur oil as fuel, the absorption tower 130 may additionally include an SOx absorption unit 132. May be.

That is, the SOx absorption unit 132 dissolves and removes SOx while reacting and cooling the exhaust gas discharged from the ship engine 10 with seawater supplied from the seawater supply unit 110, and the CO ₂ removal unit 131 is SOx is reacted with a supplied from the exhaust gas and the water supply unit 110 to remove water, cooled, by reacting an absorbing liquid from the cooled exhaust gas and the absorbing liquid producing unit 120 to switch the CO ₂ with an ammonium salt solution to absorb CO ₂ Can be removed.

Specifically, the SOx absorption unit 132 is a section in primary contact with seawater, and as shown in Figs. 3 and 6, the seawater supplied from the seawater supply unit 110 is injected downward to dissolve _{SO X and} Multi-stage seawater injection nozzle (132a) for removing dust of (soot), and an umbrella-shaped block that covers the bulkhead-shaped exhaust gas inlet pipe (132b) or the exhaust gas inlet pipe (132b) to prevent reverse flow of washing water It may include a plate (132c).

On the other hand, the temperature of the exhaust gas can be cooled to around 27°C to 33°C, preferably, around 30°C required by the _{CO 2} removal unit 131 through the seawater injection nozzle 132a or a separate cooling jacket (not shown). There, as shown in (a) of Figure 6, under the seawater injection nozzle (132a), a porous upper plate (132d) in which a flow path through which exhaust gas passes is formed is formed in multiple stages, respectively, so that seawater and exhaust gas are smoothly Or, as shown in (b) of FIG. 6, under the seawater injection nozzle 132a, absorption towers 132e filled with fillers for contacting seawater and exhaust gas are formed, respectively, so that seawater SO _X It can also be made to dissolve.

On the other hand, in _{order to further increase the solubility of SO X} , a compound that forms alkali ions, such as a basic chemical of NaOH or MgO, may be configured as a closed loop system in which seawater supplied to the SOx absorber 132 is injected. .

For reference, the closed-loop system entails consumption of additional basic chemicals, but has the advantage of having a small amount of circulating seawater, and the open-loop system that discharges _{dissolved SO X outboard by spraying only seawater consumes additional basic chemicals.} There is no simple advantage, so it can be configured as a hybrid system combining open and closed circuits to maximize these advantages.

Thus, hayeoseo to subsequently remove the CO ₂ from the CO ₂ remover 131 after removal of the SO _X first through the SO _X absorbing part 132, the first with a compound such as the solubility of SO _X cursor Na ₂ SO ₃ It is possible to improve the solubility of CO _{2 and the removal efficiency of CO 2} by solving the problem that it is difficult to remove _{CO 2} until all _{SO X is dissolved.}

Here, SO drainage of the washing water to the discharge unit 170 absorbs the SO _X by _X-absorbing portion 132 is SO ₃ ^-, SO ₄ ^2-, _{suit, NaSO 3, NaSO 4, MgCO} 3, MgSO 4 , and Other ionic compounds are also included.

Meanwhile, as mentioned above, the absorption tower 130 further includes a NOx absorption unit 133 that absorbs and removes NOx of exhaust gas discharged from the ship engine 10, and contains the exhaust gas from which NOx is removed. by the reaction with water supplied from the water supply 110 to cool and the reaction of the absorbing liquid from the cooled exhaust gas and the absorbing liquid producing unit 120, by converting CO ₂ into ammonium salt solution can remove CO _2.

_{That is, the absorption tower 130 is a NO X} absorbing unit 133 that absorbs and removes _{NO X} from the exhaust gas discharged from the ship engine 10, _{and reacts the exhaust gas from which NO X} has been removed with seawater to cool the SO. _{The SO X} absorption unit 132 that dissolves and removes _{X, and the exhaust gas from which the SO X} is removed and the ammonia water supplied from the absorption liquid manufacturing unit 120 are reacted _{to convert CO 2} into NH ₄ HCO ₃ (aq) to convert CO _{The CO 2} removal unit 131 for removing 2 is stacked in a vertical direction to sequentially absorb and remove _{NO X} , SO _X, and CO _2.

Accordingly, the CO ₂ removal unit 131 _{reacts and removes the exhaust gas from which NO X} and SO _X has been previously removed, and ammonia water, so that side reactions due to _{NO X} and SO _{X do not occur during the CO 2} removal process, thereby generating impurities. As can be minimized, it is possible to obtain _{NH 4} HCO _{3 with less impurities in a subsequent process.}

Here, the absorption tower 130 is configured to include a CO ₂ removal unit 131, an SO _X absorption unit 132, an NO _X absorption unit 133, and an EGE 134 to be described later, each consisting of individual modules It may be modularized and configured to be combined, or may be integrated and configured in a single tower form, or the absorption tower 130 itself may be configured by grouping into a single tower or a plurality of towers.

Specifically, the NO _X absorbing unit 133 is a SCR (Selective Catalyst Reactor), as shown in FIG. 5, from the primary regeneration unit 140 through a blower 133a or a compressor through a first NH ₃ injection nozzle ( _{NH 3} is directly supplied to 133b), _{or when NH 3} is insufficient, the urea water (UREA) of the urea water storage tank 133c is supplied to the second NH ₃ injection nozzle 133e through the urea water supply pump 133d. You can also take it and replace it to compensate for the shortfall.

_{Meanwhile, since NH 3} and CO ₂ are generated when the urea water is decomposed, it may be desirable to reduce the amount of _{CO 2} generated by directly supplying _{NH 3.}

In addition, the absorption tower 130 _{is formed between the NO X} absorption unit 133 and the SO _X absorption unit 132 to exchange heat between waste heat of the ship engine 10 and boiler water (Exhaust Gas Economizer) 134 It may further include.

Next, the absorption liquid regeneration unit regenerates NH ₃ and returns to the absorption tower 130 to _{be reused as a CO 2} absorption liquid, and the CO ₂ is stored in the form of CaCO ₃ (s) or MgCO ₃ (s) or discharged outboard, or NO _It may be supplied to the X absorbing part 133 to absorb NO _{X with NH 3.}

That is, the absorption liquid regeneration unit reacts the aqueous ammonium salt solution discharged from the absorption tower 130 with an aqueous divalent metal hydroxide solution to first regenerate the absorption liquid, and unreacted from the first regeneration unit 140. Consists of a secondary regeneration unit 150 to regenerate the high-concentration absorbent liquid by reacting an aqueous solution of ammonium salt with an aqueous solution of a divalent metal hydroxide and circulate it to the absorption tower 130 to reuse it as an absorbent solution. Maintaining, as mentioned above _{, NH 3} is supplied to the _{NO X} absorbing unit 133 _{and used for NO X absorption and removal, or NH 3} is discharged as exhaust gas through the absorption tower 130, and ammonia water It is possible to effectively prevent a decrease in the absorption performance due to a decrease in the concentration of.

Specifically, the absorption liquid regeneration unit, as shown in Figure 4, the storage tank 141 for storing the divalent metal hydroxide aqueous solution, the ammonium salt aqueous solution and the divalent metal hydroxide aqueous solution discharged from the absorption tower by agitating the following As shown in [Chemical Formula 3], _{the mixing tank 142 generating NH 3} (g) and carbonate, and the primary filter 143 for separating carbonate and ammonia water (or fresh water) by suctioning solution and precipitate from the mixing tank 142 ), and stores the unreacted ammonium salt aqueous solution remaining without reacting with the aqueous ammonia and divalent metal hydroxide aqueous solution separated by the primary regeneration unit 140 and the primary filter 143, and storage tank 141 The first absorption liquid storage tank 151 for re-reacting the divalent metal hydroxide aqueous solution and the unreacted ammonium salt aqueous solution from the first absorption liquid storage tank 151 and the solution and precipitates are sucked from the first absorption liquid storage tank 151 to separate carbonate and high-concentration ammonia water. A secondary filter 152 designed corresponding to the capacity of the absorbent liquid storage tank 151, a secondary absorbent liquid storage tank 153 for storing high-concentration ammonia water separated by the secondary filter 152, and a secondary absorbent liquid storage tank It may be made of a secondary regeneration unit 150, composed of an ammonia water circulation pump 154 that pumps and circulates ammonia water from 153 to the CO _{2 removal unit 131.}

Here, the storage capacity of the primary absorbent liquid storage tank 151 is designed to be at least three times the capacity of the absorbent liquid circulating the absorption tower 130 and the absorbent liquid regeneration unit, and has a relatively large capacity compared to the circulating absorbent liquid capacity, so that the primary absorbent liquid storage tank By increasing the residence time of the aqueous solution of the unreacted ammonium salt in (151), the reaction time can be sufficiently secured, so that the aqueous solution of the unreacted ammonium salt is converted into a carbonate.

Accordingly, the unreacted ammonium salt aqueous solution remaining in the ammonia water can be removed to maintain the ammonia water concentration at a certain level.

That is, the divalent metal hydroxide aqueous solution in the mixing tank 142 changes from time to time while passing through the filter due to the influence of the reaction rate and evaporation of ammonia, and when the generation of carbonate is not completed, a significant amount of the unreacted ammonium salt solution remains in the ammonia water. Since the absorption rate can be lowered, a large-capacity primary absorption liquid storage tank 151 is designed to react for a sufficient period of time and passes through the secondary filter 152 again to increase the ammonia water recovery rate, so that the ammonia water concentration can function as an effective absorption liquid. You can keep it at a certain level that you can exert.

In addition, the ammonia gas generated in the mixing tank 142 may _{be supplied to the CO 2} removal unit 131 of the absorption tower 130 or may be supplied to the NOx absorption unit 133.

Meanwhile, the primary absorption liquid storage tank 151 includes an agitator 151a for stirring and reacting an aqueous divalent metal hydroxide solution and an aqueous unreacted ammonium salt solution, and a pH sensor 151b for measuring the degree of reaction by the agitator 151a. ) Can be included.

In addition, the divalent metal hydroxide aqueous solution stored in the storage tank 141 may be Ca(OH) ₂ or Mg(OH) ₂ generated by reacting fresh water and CaO or MgO.

In addition, when the concentration of ammonia water circulating in the ammonia water circulation line (A) is low, _{the generation of (NH 4} ) ₂ CO ₃ in [Chemical Formula 2] decreases, resulting _{in an increase in CO 2} emissions, and when the concentration is high, excessive CO _{2 Since} the carbonate production amount increases more than necessary due to absorption, the concentration of ammonia water should be kept constant so that the CO ₂ absorption performance of the absorption tower 130 is maintained. To implement this, it may be designed to adjust the concentration of ammonia water to 12% by mass, but is not limited thereto and may be changed according to use conditions.

_{In addition, carbonates (CaCO 3} (s), MgCO ₃ (s)) separated by the primary filter 143 and the secondary filter 152 are transferred in a slurry state or to a dryer (not shown). In a solidified solid state, a separate storage tank (not shown) for storage may be provided, or may be discharged outboard. Here, as an example of the primary filter 143 and the secondary filter 152, a membrane filter suitable for sediment separation by high-pressure fluid transfer may be applied.

In addition, the ammonia water circulation pump 154 may be configured as a centrifugal pump type pump so that a large amount of ammonia water circulates through the ammonia water circulation line (A).

On the other hand, ammonia water or fresh water separated by the first filter 143 and the second filter 152 is supplied to the secondary absorption liquid storage tank 153, or surplus generated by the mixing tank 142 relative to the total circulation fresh water Fresh water may be saved in a fresh water tank (not shown) and recycled when the divalent metal hydroxide aqueous solution is generated in the storage tank 141, thereby reducing fresh water.

Through this, there is no need to add water by adding only a relatively inexpensive metal oxide (CaO or MgO) or a divalent metal hydroxide aqueous solution (Ca(OH) ₂ or Mg(OH) ₂ ), there is no reduction in the concentration of ammonia water, and the primary The size of the capacity of the filter 143 and the secondary filter 152 can be reduced, and the _{cost of regenerating NH 3} can be reduced. That is, theoretically, only metal oxides are consumed, and NH ₃ and fresh water are reused, so that the _{cost of removing CO 2} can be significantly reduced.

Next, as shown in FIG. 7, the steam generator 160 receives a mixture in the form of steam and saturated water heat-exchanged through the EGE 134 and receives a steam drum (not shown). The auxiliary boiler 161 that separates the steam and supplies it to the steam consumer, the boiler water circulating water pump 162 that circulates and supplies the boiler water from the auxiliary boiler 161 to the EGE 134, and the steam consumption. A cascade tank 163 that recovers the condensed water that has been condensed and has changed phase, and a supply pump 164 and a control valve that control and supply the amount of boiler water from the cascade tank 163 to the auxiliary boiler 161 Consisting of (165), it generates and supplies steam necessary for heating equipment on board 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, and the amount of steam required in the ship can be sufficiently produced through the EGE 134, but if not, the auxiliary boiler 161 itself The fuel can also be burned to produce the necessary steam.

Next, the discharge unit 170, as shown in Figure 7, the washing water tank 171 for storing the washing water discharged from the absorption tower 130, from the washing water tank 171 to the transfer pump 172 A water treatment device 173 having a filtering unit for adjusting turbidity and a neutralizing agent injection unit for pH adjustment to meet the outboard discharge condition of the washing water transferred by the water treatment device 173, and a sludge storage tank for separating and storing solid discharges such as chutes ( Consisting of 174), washing water that passes through the water treatment device 173 and satisfies the outboard discharge conditions is discharged outboard, and solid discharges such as chutes that do not meet the outboard discharge conditions are separately stored in the sludge storage tank 174. Can be stored.

On the other hand, NaOH may be exemplified as a neutralizing agent for meeting the outboard discharge conditions, but it is assumed that the substances discharged from the absorption tower 130 are both acidic or basic, and can neutralize each of these acids or basics as necessary. A neutralizing agent may be selected and used.

On the other hand, a ship according to another embodiment of the present invention may provide a ship equipped with the aforementioned device for reducing greenhouse gas emissions from the ship.

Therefore, by the configuration of the vessel's greenhouse gas emission reduction device as described above, the absorption liquid regeneration unit is configured in two or more stages to remove the unreacted ammonium salt aqueous solution remaining in the ammonia water to maintain the ammonia water concentration at a certain level, and the recovery rate of the absorbent liquid A substance that does not affect the environment so as to increase the GHG absorption performance and prevent deterioration of the GHG absorption performance, and to prevent the loss of absorption liquid due to the natural evaporation of the high-concentration absorption liquid by applying a pressurization system, and to meet IMO GHG emission regulations storage switch separate discharge or converted to useful materials and in and reproduces the NH ₃ minimizing the relatively high price of the NH ₃ consumption and can reduce the capacity size of the rear end of the filter, the carbonate present in the greenhouse gases to the natural form It can be stored as a seawater discharge, and side reactions caused by SO _{X remaining during NH 3 regeneration can be removed to minimize the loss of NH 3} and prevent impurities from being included when ammonia is recovered.

In the above, the present invention has been described with reference to the embodiments shown in the drawings. However, the present invention is not limited thereto, and various modifications or other embodiments falling within the scope equivalent to the present invention are possible by those of ordinary skill in the art. Therefore, the true scope of protection of the present invention should be determined by the claims that follow.

110: seawater supply unit 111: seawater pump
112: seawater control valve 120: absorbent liquid manufacturing unit
121: fresh water control valve 122: NH ₃ reservoir
123: ammonia water tank 124: pH sensor
125: ammonia water supply pump 130: absorption tower
131: CO ₂ removal unit 132: SOx absorption unit
133: NOx absorption part 134: EGE
140: primary regeneration unit 141: storage tank
142: mixing tank 143: primary filter
150: secondary regeneration unit 151: primary absorbent liquid storage tank
152: secondary filter 153: secondary absorbent liquid storage tank
154: ammonia water circulation pump 160: steam generator
161: auxiliary boiler 162: boiler water circulation water pump
163: cascade tank 164: supply pump
165: control valve 170: discharge
171: washing water tank 172: transfer pump
173: water treatment device 174: sludge storage tank

Claims (24)

Seawater supply unit for supplying seawater;
An absorbent liquid manufacturing unit for manufacturing and supplying a high concentration CO _{2 absorbent liquid;}
Cooled by the sea water and the reaction supplies the exhaust gas from the water supply portion is discharged from a marine engine, and by reacting the cooled absorption liquid from the exhaust gas and the absorbing solution production unit to convert CO ₂ as an ammonium salt aqueous solution to remove the CO ₂ An absorption tower in which a _{CO 2 removal part is formed;} And
By reacting the aqueous ammonium salt solution discharged from the absorption tower with an aqueous divalent metal hydroxide solution to first regenerate the absorbent solution, and an aqueous divalent metal hydroxide solution added to the aqueous solution of unreacted ammonium salt from the primary regeneration unit. Including; an absorbent liquid regeneration part comprising a secondary regeneration part configured to regenerate the high-concentration absorbent liquid secondarily and circulate it to the absorption tower to reuse it as an absorbent liquid.
Vessel's greenhouse gas emission reduction device. The method of claim 1,
The absorbent liquid regeneration unit,
A storage tank for storing the aqueous divalent metal hydroxide solution;
_{A mixing tank for generating NH 3} (g) and carbonate by stirring an aqueous ammonium salt solution and an aqueous divalent metal hydroxide solution discharged from the absorption tower with a stirrer, and a primary for separating carbonate by sucking the solution and precipitate from the mixing tank Consisting of a filter, the primary regeneration unit; And
A primary absorption liquid storage tank for storing the aqueous ammonia or unreacted ammonium salt aqueous solution separated by the primary filter, and re-reacting the aqueous divalent metal hydroxide solution and the unreacted ammonium salt aqueous solution from the storage tank, and the primary absorption liquid storage tank A secondary regeneration unit comprising; a secondary filter configured as a secondary filter for separating carbonate and high-concentration ammonia water by sucking the solution and precipitate from the secondary filter, and a secondary absorption liquid storage tank for storing the high-concentration ammonia water separated by the secondary filter. Characterized by,
Vessel's greenhouse gas emission reduction device. The method of claim 2,
The storage capacity of the primary absorption liquid storage tank is characterized in that at least three times the capacity of the absorption liquid circulating the absorption tower and the absorption liquid regeneration unit,
Vessel's greenhouse gas emission reduction device. The method of claim 2,
The primary absorption liquid storage tank includes a stirrer for reacting by stirring the divalent metal hydroxide aqueous solution and the aqueous ammonia or unreacted ammonium salt aqueous solution separated by the primary filter, and a pH sensor for measuring the degree of reaction by the stirrer. Characterized in that,
Vessel's greenhouse gas emission reduction device. The method of claim 2,
The divalent metal hydroxide aqueous solution stored in the storage tank is characterized in that Ca(OH) ₂ or Mg(OH) ₂ produced by reacting fresh water and CaO or MgO,
Vessel's greenhouse gas emission reduction device. The method of claim 2,
Divalent metal in the storage tank by supplying ammonia water or fresh water separated by the secondary filter to the secondary absorption liquid storage tank, or storing excess fresh water additionally generated by the mixing tank relative to the total circulation fresh water in the fresh water tank. Characterized in that recycling when generating a hydroxide aqueous solution,
Vessel's greenhouse gas emission reduction device. The method of claim 1,
The absorption tower further includes an SOx absorption unit for dissolving and removing SOx while reacting and cooling the exhaust gas discharged from the ship engine with seawater supplied from the seawater supply unit,
The CO ₂ removal unit reacts and cools the exhaust gas from which the SOx has been removed and seawater supplied from the seawater supply unit, and reacts the cooled exhaust gas and the absorbent solution from the absorption solution manufacturing unit _{to convert CO 2} into an aqueous ammonium salt solution. Characterized in that CO _{2 is removed,}
Vessel's greenhouse gas emission reduction device. The method of claim 1,
The absorption tower further includes a NOx absorption unit for absorbing and removing NOx of exhaust gas discharged from the ship engine, and cooling the exhaust gas from which the NOx is removed by reacting with seawater supplied from the seawater supply unit. by reacting an absorbing liquid from the exhaust gas and the absorbing solution production unit to convert CO ₂ as an ammonium salt aqueous solution, characterized in that for removing CO _2,
Vessel's greenhouse gas emission reduction device. The method of claim 1,
_{The absorption tower includes a NO X} absorbing unit that absorbs and removes _{NO X} from the exhaust gas discharged from the ship engine _{, and SO X while cooling by reacting the exhaust gas from which the NO X} has been removed with seawater supplied from the seawater supply unit. and SO _X absorbing component which dissolves to remove the SO _X is removed, the exhaust gas and the absorbing liquid by the reaction of the absorbing solution from the production unit switches the CO ₂ with an ammonium salt solution by adding CO ₂ removal to remove the CO ₂ sequentially stacked Characterized in that it is formed,
Vessel's greenhouse gas emission reduction device. The method according to claim 8 or 9,
_{NH 3} regenerated by the absorbent liquid regeneration unit is returned to the absorption tower to be converted into an absorbent liquid for reuse,
The NO _X absorbent portion when supplied to the NH ₃ reproduced by the absorbing solution reproducing section absorbs the NO _X to NH _3, or use a number of elements, characterized in that to absorb the NO _X,
Vessel's greenhouse gas emission reduction device. The method according to claim 7 or 9,
The seawater supply unit,
Including; received through said chest from the outboard supply of sea water from the sea water pump in accordance with the amount of the sea water pump for pumping parts of the SO _X absorbent, the exhaust gas water control valve for controlling the injection amount of the sea water being supplied to the SO _X absorbing Characterized in that,
Vessel's greenhouse gas emission reduction device. The method of claim 2,
The absorbent liquid manufacturing unit,
A fresh water tank for storing fresh water;
A fresh water control valve for supplying fresh water from the fresh water tank;
_{NH 3} reservoir for storing _{NH 3} under high pressure;
An ammonia water tank for preparing and storing high-concentration ammonia water as an absorption liquid by spraying _{NH 3} supplied from _{the NH 3} reservoir to the fresh water supplied by the fresh water control valve;
A pH sensor measuring the concentration of aqueous ammonia in the aqueous ammonia tank; And
Characterized in that it comprises a; ammonia water supply pump for supplying ammonia water from the ammonia water tank to the secondary absorption liquid storage tank,
Vessel's greenhouse gas emission reduction device. The method of claim 12,
It characterized in that it further comprises an ammonia water circulation pump for circulating ammonia water from the secondary absorption liquid storage tank to the absorption tower,
Vessel's greenhouse gas emission reduction device. The method of claim 12,
Injecting compressed air of a predetermined pressure into the ammonia water tank to prevent evaporation loss of _{NH 3,}
Vessel's greenhouse gas emission reduction device. The method according to claim 7 or 9,
The SO _X absorbing part,
Multi-stage seawater injection nozzles for injecting seawater supplied from the seawater supply unit downward; And
Characterized in that it comprises; an exhaust gas inlet pipe in the form of a partition wall or an umbrella-shaped blocking plate covering the exhaust gas inlet pipe to prevent the washing water from flowing backward.
Vessel's greenhouse gas emission reduction device. The method of claim 15,
In the lower portion of the seawater injection nozzle, a porous upper plate having a flow path through which the exhaust gas passes is formed in multiple stages, respectively, so that the seawater and the exhaust gas come into contact with each other,
Vessel's greenhouse gas emission reduction device. The method of claim 15,
An absorption tower filled with a filler for contacting seawater and exhaust gas is formed under the seawater injection nozzle, so that the seawater dissolves _{SO X,}
Vessel's greenhouse gas emission reduction device. The method of claim 15,
Characterized in that the neutralizing agent is added to the seawater supplied to the SO _{X absorption unit,}
Vessel's greenhouse gas emission reduction device. The method of claim 1,
The CO ₂ removal unit,
An ammonia water spray nozzle for spraying the absorbent liquid supplied from the absorbent liquid regeneration unit downward;
A filler for converting _{CO 2} into NH ₄ HCO ₃ (aq) by contacting CO ₂ with aqueous ammonia as an absorption liquid;
A cooling jacket formed in multiple stages for each section of the absorption tower filled with the filler to cool heat generated by the _{CO 2 removal reaction;}
Water spray that does not react with CO _{2 and collects NH 3 discharged to the outside;}
A mist removal plate formed in a curved multi-plate shape to return ammonia water in the direction of the filler;
A partition wall formed to prevent ammonia water from flowing back; And
Characterized in that it comprises; an umbrella-shaped blocking plate for covering the exhaust gas inlet hole surrounded by the partition wall,
Vessel's greenhouse gas emission reduction device. The method of claim 19,
The filler is composed of a multi-stage distillation column packing designed to have a large contact area per unit volume,
Characterized in that the solution redistributor is formed between the distillation column packing,
Vessel's greenhouse gas emission reduction device. The method of claim 9,
The absorption tower,
It characterized in that it further comprises an EGE formed between the NO _X absorbing part and the SO _X absorbing part to exchange heat between waste heat of the ship engine and boiler water,
Vessel's greenhouse gas emission reduction device. The method of claim 21,
An auxiliary boiler that receives a mixture in the form of heat-exchanged steam and saturated water, separates the steam and supplies it to a steam consumer, a boiler water circulating water pump that circulates and supplies boiler water from the auxiliary boiler to the EGE, and from the steam consumer It characterized in that it further comprises a cascade tank for recovering the condensed condensed water, and a steam generator including a supply pump and a control valve for adjusting and supplying the amount of boiler water from the cascade tank to the auxiliary boiler,
Vessel's greenhouse gas emission reduction device. The method of claim 1,
A washing water tank for storing the washing water discharged from the absorption tower, a filtering unit for adjusting turbidity to meet the outboard discharge condition of the washing water transferred by the transfer pump to the washing water tank, and a neutralizing agent injection unit for pH adjustment. It characterized in that it further comprises a discharge unit, consisting of a water treatment device provided, and a sludge storage tank for separating and storing solid discharges,
Vessel's greenhouse gas emission reduction device. A ship equipped with a GHG emission reduction device of a ship according to any one of claims 1 to 9.

Images