KR102231469B1 - Apparatus for reducing greenhouse gas emission in vessel cooperated with exhaust gas recirculation and vessel including the same - Google Patents

Abstract

According to the present invention, disclosed is an EGR-combined greenhouse gas emission reduction apparatus for a vessel. The apparatus includes: an exhaust gas cleaning end (100) cleaning and cooling some exhaust gas from a vessel engine (10), suppressing the generation of NOX through control on an oxygen concentration, and resupplying the exhaust gas to the vessel engine (10) such that the same can be used as combustion air; a greenhouse gas reduction end (200) interoperated with the exhaust gas cleaning end (100), thereby cooling residual exhaust gas from the vessel engine (10), and controlling the concentration of a circulating greenhouse gas absorption solution to effectively reduce and discharge greenhouse gas; an absorption solution regeneration end (300) regenerating the greenhouse gas absorption solution to return and circulate the same to the greenhouse gas reduction end (200); and an exhaust gas circulation end (400) circulating some of the exhaust gas purified through the greenhouse gas reduction end (200) into the vessel engine (10) such that the same can be used as combustion air. Therefore, the present invention is capable of reducing NOX generation by maintaining existing EGR while absorbing CO2 which is typical greenhouse gas and discharging the same by converting the same into a substance which does not affect the environment, or storing the same as a beneficial substance to prevent the corrosion of an engine and improve combustion quality, and also, preventing a deterioration in absorption performance by keeping the concentration of the absorption solution constant through control on the concentration of the absorption solution.

Description

Ship's EGR combined GHG emission reduction device and ship equipped with the same device {APPARATUS FOR REDUCING GREENHOUSE GAS EMISSION IN VESSEL COOPERATED WITH EXHAUST GAS RECIRCULATION AND VESSEL INCLUDING THE SAME}

_{The present invention can reduce the production of NO X,} which is the original purpose of EGR, while maintaining the existing EGR, while _{absorbing SO X} as well as _{CO 2} , a representative greenhouse gas, and converting it into a material that does not affect the environment, or storing it as a useful material. The ship's EGR-coupled greenhouse gas emission reduction device and the same device are designed to prevent corrosion of the engine, improve combustion quality, and control the concentration of the absorbent solution to maintain a constant concentration of the absorbent solution to prevent the decrease in greenhouse gas absorption performance. It relates to equipped ships.

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

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.}

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 of using hydrogen or ammonia as fuel is currently being developed and has not reached the stage of commercialization. Actually.

On the other hand, as _{a method of reducing NO X} in exhaust gas exhausted from the ship engine, EGR (Exhaust Gas Recirculation) is applied to recirculate the mixed gas to the intake system of the ship engine by mixing part of the exhaust gas with compressed combustion air. have.

Thus, while maintaining EGR for ships that are operating or scheduled to build using fossil fuels, they reduce NOx generation, which is the original purpose of EGR, while _{absorbing CO 2} as well as SO _X , a representative greenhouse gas, that does not affect the environment. There is a need to apply a technology that can be converted into a substance and discharged or stored as a useful substance.

In addition, among the exhaust gases emitted from ship engines, CO ₂ is absorbed into an absorbent liquid and converted into a substance that does not affect the environment and discharged, or it is converted into a useful substance and stored. Absorption performance due to the change in concentration due to repeated circulation of the absorbent liquid. The need to apply technology to ships, which can prevent degradation, is raised.

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 task to be achieved by the idea of the present invention is _{to reduce the production of NO X, which is the original purpose of EGR, while maintaining the existing EGR, while absorbing not only CO 2} but also SO _X , a representative greenhouse gas, and converting it into a material that does not affect the environment and discharged. EGR-combined greenhouse of ships, which can be stored as a useful material to prevent corrosion of the engine, improve combustion quality, and control the concentration of the absorbent to keep the concentration of the absorbent constant and prevent the reduction of greenhouse gas absorption performance. It is to provide a gas emission reduction device and a ship equipped with the device.

In order to achieve the above object, the present invention cleans and cools some exhaust gas from the ship engine, controls the oxygen concentration _{to suppress the generation of NO X} , and resupplies it to the ship engine for reuse as combustion air. An exhaust gas cleaning stage; A greenhouse gas reduction stage for effectively reducing and discharging greenhouse gases by interlocking with the exhaust gas cleaning stage, cooling the residual exhaust gas from the ship engine, and adjusting the concentration of the circulating greenhouse gas absorption liquid; An absorption liquid regeneration stage for regenerating the GHG absorption liquid and returning to the GHG reduction stage for circulation; And an exhaust gas circulation stage for circulating a part of the exhaust gas purified through the greenhouse gas reduction stage to the ship engine to be used as combustion air.

In addition, the exhaust gas cleaning stage includes an exhaust gas receiver for temporarily storing exhaust gas exhausted from each cylinder of the ship engine to remove pulsation, and an SO by spraying the cleaning water with some exhaust gas discharged from the exhaust gas receiver. _A cleaning unit that removes X and chute to clean, and circulates coolant to cool the exhaust gas, and a cleaning unit that temporarily stores the exhaust gas that has passed through the cleaning unit to remove pulsation, and mixes with combustion air to Comprising a combustion air receiver to be supplied to the cylinder, the greenhouse gas reduction stage, an exhaust gas cooling unit for cooling residual exhaust gas discharged from the exhaust gas receiver bypassing the cleaning unit, and a high concentration CO ₂ absorbing liquid. by reacting an absorbing liquid from the absorbing liquid producing unit, producing the exhaust gas cooler of the exhaust gas and the absorbing solution is cooled by the unit for supplying the conversion of CO ₂ to the ammonium salt solution formed CO ₂ removal portion for removing the CO _2, the absorption A tower and an absorbent solution concentration control unit for controlling a concentration of the absorbent solution supplied from the absorbent solution manufacturing unit to the absorption tower, and the absorption solution regeneration stage reacts the ammonium salt aqueous solution discharged from the absorption tower with a divalent metal hydroxide aqueous solution. It _{includes an ammonia regeneration unit for regenerating NH 3} and returning it to the absorption tower to be reused as an absorption liquid, and the exhaust gas circulation stage is configured to recirculate part of the exhaust gas purified through the absorption tower to the combustion air receiver. I can.

In addition, the cleaning unit includes a cleaning water supply module that receives and neutralizes fresh water to supply cleaning water, and a cleaning system in which cleaning water from the cleaning water supply module is injected into exhaust gas from the exhaust gas receiver to cool and clean it. It may include a module, a cooling module that cools through cooling water, a washing water circulation module that circulates the washing water that has passed through the washing module, and a water treatment module that treats contaminated washing water after passing through the washing module.

In addition, the washing water supply module includes a washing water supplement pump that supplements the washing water circulating by receiving fresh water and supplies it to the washing module, and a neutralizing agent into the washing water supplied from the washing water supplement pump to the washing module. And a neutralizing agent supply valve, wherein the cleaning module includes _{at least one cleaning unit for cleaning by spraying cleaning water to remove SO X} and a chute, and the cooling module is formed at a lower end of the at least one cleaning unit. And one or more cooling units for cooling exhaust gas to a predetermined temperature by circulating cooling water, wherein the washing water circulation module comprises: a washing water circulation tank collecting washing water passing through the washing module; and the washing water circulation tank A pH meter that measures the pH of the washing water from the washing water and controls the neutralizing agent supply valve to determine the input amount of the neutralizing agent, a buffer tank storing the initial amount of washing water and replenishing the washing water, and washing water with the buffer tank And a washing water circulation pump for circulating a portion of the washing water and circulating a portion of the washing water to the washing module, wherein the water treatment module treats the washing water discharged from the buffer tank to return the treated washing water to the buffer tank. A unit, a sludge tank for storing sludge discharged from the water treatment unit, an outboard discharge valve for discharging washing water satisfying a predetermined discharge condition by the water treatment unit, and a temporary storage for washing water from the buffer tank. It may include a washing water drain tank.

In addition, a washing water cooling unit may further include a washing water cooling unit installed at a rear end of the washing water circulation pump to cool the washing water circulating to reinforce cooling of the washing water by the cooling module.

In addition, a turbine rotating by the high-temperature and high-pressure exhaust gas supplied from the exhaust gas receiver, a compressor that is coupled to a rotating shaft of the turbine and rotates to compress combustion air and supply it to the combustion air receiver, and an inlet side of the compressor. An air intake filter formed in the air intake filter to filter foreign substances, a combustion air cooling module that cools exhaust gas supplied from the compressor to the combustion air receiver, and a agent that adjusts the flow rate of exhaust gas from the exhaust gas receiver to the turbine. It may further include a supercharging stage comprising a first control valve and a second control valve formed at a front end of the first control valve to control the flow rate of the exhaust gas to the cleaning unit.

In addition, the exhaust gas further comprises a third control valve for adjusting the flow rate of the exhaust gas from the exhaust gas receiver to the cleaning unit, due to the high load or high temperature exhaust gas, the exhaust coupled to the exhaust gas pipe connected to the turbine When damage to the gas-use-related device is expected, opening/closing of the third control valve may be controlled to increase the flow rate of the exhaust gas to the cleaning unit to lower the temperature of the exhaust gas.

In addition, the combustion air cooling module includes one or more cooling jackets for cooling combustion air by circulating cooling water, and a mist catcher formed in a curved multi-plate shape to remove moisture from the combustion air passing through the cooling jacket. I can.

_{In addition, the exhaust gas cooling unit is an SO X} absorbing unit that dissolves and removes _{SO X} while receiving and spraying seawater as exhaust gas discharged from the ship engine and passing through the lower end of the absorption tower, or It may be a fresh water heat exchange unit that cools exhaust gas by circulating fresh water through an enclosing heat exchange pipe.

In addition, the CO ₂ removal unit may remove the CO ₂ to convert the CO ₂ absorbing solution from the production unit was reacted by the exhaust gas passing through the cooling the exhaust gas and the absorption liquid with an ammonium salt solution.

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 absorbent liquid concentration control unit.

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 absorption liquid concentration control unit, a fresh water supply line for supplying fresh water; A pH sensor measuring the concentration of aqueous ammonia, which is an absorption liquid supplied to the absorption tower; A flow rate control valve that controls the flow rate of the ammonia water supplied from the absorbent liquid manufacturing unit; A mixer configured to increase the concentration by mixing high-concentration ammonia water from the absorption liquid preparation unit according to the ammonia water concentration by the pH sensor, or to lower the concentration by mixing fresh water from the fresh water supply line to adjust the concentration of the ammonia water; And a valve for maintaining pressure to prevent evaporation of _{NH 3} when mixing by the mixer.

In addition, the CO ₂ removal unit, an ammonia water spray nozzle for spraying the ammonia water supplied from the absorption liquid concentration control 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, it is formed between the exhaust gas cleaning stage and the greenhouse gas reduction stage, it may further include an EGE for heat exchange between the waste heat of the ship engine and boiler water.

In addition, the ammonia 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 the aqueous ammonium salt solution and the aqueous divalent metal hydroxide solution discharged from the absorption tower with a stirrer; A filter for separating carbonate by sucking the solution and precipitate from the mixing tank; A high pressure pump for transferring the solution and precipitate to the filter at high pressure; And an ammonia water storage tank for storing the ammonia water or fresh water separated by the filter and supplying it to the absorbent liquid concentration control unit.

In addition, the divalent metal hydroxide aqueous 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, the exhaust gas cooling unit is an SOx absorption unit that dissolves and removes SOx while cooling the exhaust gas by receiving and spraying seawater, and the cleaned water discharged from the absorption tower by dissolving and removing SOx while cooling the exhaust gas. A water treatment device including a washing water tank storing a washing water tank, a filtering unit for adjusting turbidity to meet the outboard discharge condition of the washed water transferred by the transfer pump to the washing water tank, and a neutralizing agent injection unit for adjusting pH, and solid Consisting of a sludge storage tank for separating and storing the discharge of the, may further include a discharge stage.

In addition, in Tier II mode operation, the exhaust gas circulation end prevents the backflow of combustion air to the exhaust gas recirculation fan through a valve on the outlet side of the exhaust gas recirculation fan, and Accordingly, by adjusting the blowing pressure of the exhaust gas recirculation fan to increase the pressure of the exhaust gas from which moisture has been removed to recirculate, and when operating in Tier III mode, some of the exhaust gas supplied to the supercharge stage is bypassed, or , Part of the compressed combustion air can be discharged to the outside or supplied for sludge drying.

In addition, the exhaust gas cleaning stage may be mounted in an engine room or an engine casing of the marine engine.

In addition, the exhaust gas circulation stage may circulate 30% to 40% of the exhaust gas purified through the greenhouse gas reduction stage to the ship engine to be used as combustion air.

On the other hand, the present invention can provide a ship equipped with an EGR-coupled greenhouse gas emission reduction device according to the above-described configuration.

According to the present invention, while maintaining the existing EGR, while reducing the production of _{NO X, which is the original purpose of EGR, it absorbs not only CO 2} but also SO _X , which is a representative greenhouse gas, and converts it into a material that does not affect the environment, or stores it as a useful material It can prevent engine corrosion and improve combustion quality, prevent _{engine corrosion and reduce environmental pollution by removing SO X} and CO ₂ from recirculating exhaust gas, and reduce engine room or engine casing of ship engines. It can be installed in the form of installation to save installation space, thereby securing extra space, and allowing additional installation on ships where the existing EGR system is installed, so that there are few changes, and NO from exhaust gas. _X and SO _X and CO ₂ are converted into substances that do not affect the environment to meet the IMO greenhouse gas emission regulations and discharged separately or converted into useful substances for storage, _{reducing the cost of NH 3} recycling, and at the rear end of the filter. parts can be reduced and capacity measurements, CO ₂ is removed during the consumption is relatively low NH ₃ and Ca (OH) ₂ or Mg (OH) ₂ man there is an effect that it is possible to reduce the cost of CO ₂ removal.

In addition, by controlling the concentration of the absorbent liquid, the concentration of the absorbent liquid is kept constant to prevent the reduction of greenhouse gas absorption performance, and by applying a pressurization system, there is an effect of preventing the loss of the absorbent liquid due to the natural evaporation of the high concentration absorbent liquid.

1 shows a schematic configuration diagram of an EGR-coupled greenhouse gas emission reduction apparatus of a ship according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of a system for implementing an EGR-coupled greenhouse gas emission reduction device of the ship of FIG. 1.
FIG. 3 is a separate illustration of an exhaust gas cleaning stage of the circuit diagram system of FIG. 2.
4 is a separate diagram illustrating a greenhouse gas reduction stage of the circuit diagram system of FIG. 2.
FIG. 5 is a separate diagram illustrating an absorbent liquid regeneration stage of the circuit diagram system of FIG. 2.
6 is a separate diagram illustrating an exhaust gas circulation stage of the circuit diagram system of FIG. 2.
7 is an illustration of the exhaust gas cooling unit of the circuit diagram system of FIG. 2 separated.
FIG. 8 is a schematic diagram illustrating the supercharge stage of the system of FIG. 2 separately.
9 is a separate diagram illustrating the EGE of the circuit diagram system of FIG. 2.
FIG. 10 is a separate view showing the discharge end of the circuit diagram system of FIG. 2 of FIG. 2.
11 illustrates a filler applied to the circuit diagram system of FIG. 2.
12 illustrates an ammonia water injection nozzle of the circuit diagram system 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 EGR-coupled greenhouse gas emission reduction apparatus of a ship according to an embodiment of the present invention cleans and cools some exhaust gas from the ship engine 10, and controls the oxygen concentration to generate _{NO X.} In conjunction with the exhaust gas cleaning stage 100 and the exhaust gas cleaning stage 100, which are resupplied to the ship engine 10 and reused as combustion air, the remaining exhaust gas from the ship engine 10 is cooled. , The GHG reduction stage 200 that effectively reduces and discharges greenhouse gases by controlling the concentration of the circulating GHG absorption liquid, and the absorption liquid regeneration stage that circulates by regenerating the GHG absorption liquid and returning it to the GHG reduction stage 200 ( 300) and an exhaust gas circulation stage 400 that circulates part of the purified exhaust gas through the greenhouse gas reduction stage 200 to the ship engine 10 to be used as combustion air, and maintains the existing EGR to reduce NO. _{While reducing X generation, it absorbs CO 2} , a representative greenhouse gas, and converts it into a material that does not affect the environment and discharges it, or it can be stored as a useful material to prevent engine corrosion, improve combustion quality, and adjust the concentration of absorbent liquid. Therefore, the main point is to keep the concentration of the absorbent liquid constant to prevent the decrease in absorption performance.

Hereinafter, referring to FIGS. 1 to 12, the EGR-coupled greenhouse gas emission reduction apparatus of the vessel having the above-described configuration will be described in detail as follows.

The exhaust gas cleaning stage 100 cleans and cools some exhaust gas from the main engine or the ship engine 10, which is a power generation engine, and controls the oxygen concentration _{to suppress the generation of NO X} , and the ship engine 10 Resupply and reuse as combustion air.

That is, the exhaust gas cleaning stage 100 includes an exhaust gas receiver 110 that temporarily stores exhaust gas exhausted from each cylinder of the ship engine 10 to remove pulsation, as shown in FIGS. 2 and 3. , Washing water is injected with some of the exhaust gas discharged from the exhaust gas receiver 110 _{to remove SO X} and the soot to clean, circulate the cooling water to cool the exhaust gas, and adjust the oxygen concentration to reduce NO _x . The cleaning unit 120 that suppresses generation and the exhaust gas that has passed through the cleaning unit 120 are temporarily stored to remove pulsation, mixed with combustion air, and supplied to each cylinder of the ship engine 10 to be reused. It consists of a combustion air receiver (130).

Here, the exhaust gas receiver 110 receives the high-temperature and high-pressure exhaust gas exhausted from the exhaust gas discharge port after combustion from the combustion chamber of each cylinder (not shown) composed of a plurality of ship engines 10. It is temporarily stored to remove the pulsation of the exhaust gas, and selectively supplied to the cleaning unit 120 or the supercharge stage 500 at the rear stage through the opening and closing of the control valve.

For example, since the ignition sequence of each cylinder is different, the timing of exhaust gas is also different and pulsation occurs.The exhaust gas receiver 110 has a capacity suitable for removing the pulsation of the exhaust gas pressure, and has a cylinder shape that can keep warm. It is formed and one side is connected to the exhaust gas outlet of the combustion chamber, and the other side is connected to the inlet side of the turbine 510 of the supercharge stage 500 or the inlet side of the cleaning module 122 of the cleaning unit 120 to supply the exhaust gas.

In addition, the cleaning unit 120 is an exhaust gas recirculation (EGR), as a component that cleans, cools, and neutralizes the exhaust gas, and uses the exhaust gas supplied from the exhaust gas receiver 110 to first or second By sequentially spraying by car, SO _X contained in the exhaust gas and the chute are removed and cleaned, the cooling water is circulated to cool the exhaust gas, and the exhaust gas is supplied to the combustion air receiver 130.

For reference, in the combustion chamber, some of the oxygen contained in the combustion air is combusted with fuel _{to generate CO 2} and the rest generates NO _{X and SO X} , and the cleaning unit 120 is an exhaust containing a large amount of _{CO 2 after combustion.} By cleaning and cooling the gas, only the minimum oxygen (O ₂ ) required for combustion is supplied to the combustion chamber of the ship engine 10 together with the combustion air from the supercharge stage 500, thereby increasing _{the CO 2 concentration of the combustion air itself and} lowering the concentration can be to inhibit the production of NO _X.

On the other hand, in proportion to the recirculation rate of the exhaust gas by the cleaning unit 120, _{the amount of NO x} reduction is also increased, and about 30% to 40% of the total exhaust gas is recirculated between the ship engine 10 and the cleaning unit 120. It may be configured to be supplied to the ship engine 10.

Specifically, the washing unit 120 receives and neutralizes fresh water to supply washing water to the washing water supply module 121 and the washing water supplied from the washing water supply module 121 to an exhaust gas receiver ( A cleaning module 122 that cools and cleans by spraying with the exhaust gas from 110), a cooling module 123 that cools the exhaust gas by circulating coolant to the cleaning module 122, and the cleaning module 122. It may be composed of a washing water circulation module 124 for circulating and reusing the washing water, and a water treatment module (WTS) 125 for treating contaminated washing water after passing through the washing module 122.

Specifically, the washing water supply module 121 includes a washing water supplement pump 121b that receives fresh water through the fresh water supply valve 121a, supplements the washing water circulating and supplies it to the washing module 122, and And a neutralizing agent supply valve 121c for injecting a neutralizing _{agent, for example, a basic neutralizing agent for removing sulfuric acid generated by SO X} into the washing water supplied from the supplement pump 121b to the washing module 122.

The cleaning module 122 includes at least one cleaning unit for cleaning by spraying cleaning water with exhaust gas _{to remove SO X} and the chute, that is, supplied from the cleaning water supply module 121 or the cleaning water circulation module 124 Pre-spray the neutralized washing water as exhaust gas to cool the high-temperature exhaust gas to 200°C to 300°C, _{and remove particles such as SO X} and chute to clean the first washing unit at the front end. (122a) and the second cleaning unit (122b) at the rear stage, which cools the exhaust gas to around 45℃ by secondary spraying of cleaning water (EGR cooler spray), _{and removes particle components such as SO X and chute, respectively.} Can be configured.

The cooling module 123 includes one or more cooling units formed at the lower end of the one or more cleaning units to cool the exhaust gas to a predetermined temperature by circulating cooling water, that is, formed at the lower end of the first cleaning unit 122a. The first cooling unit 123a that cools the exhaust gas to a certain temperature by circulating cooling water, and the second cooling that cools the exhaust gas to a certain temperature by cooling water that is formed at the lower end of the second cleaning unit (122b). Each may be configured as a unit (123b).

The washing water circulation module 124 includes a washing water circulation tank 124a for collecting the washing water that has passed through the washing module 122, and a neutralizing agent supply valve by measuring the pH of the washing water from the washing water circulation tank 124a. A pH meter 124b that adjusts (121c) to determine an input amount of the basic neutralizing agent, and a buffer tank 124c that stores an initial amount of washing water and replenishes the washing water to the washing module 122, A washing water circulation pump 124d that circulates a part of the washing water to the buffer tank 124c and circulates a part of the washing water to the washing module 122, and the washing water that is installed at the rear end of the washing water circulation pump 124d. It is composed of a washing water cooling unit 124e that cools and reinforces the cooling of the washing water by the cooling module 123.

Here, the pH meter 124b measures the pH due to sulfuric acid contained in the circulating washing water, and adjusts the input amount of a basic neutralizing agent such as NaOH by the neutralizing agent supply valve 121c according to the measured pH. It is neutralized to prevent corrosion of pipelines and related components in which the washing water circulates, and the buffer tank 124c collects and removes additional moisture incidental due to combustion of exhaust gas, and is treated with water by the water treatment module 125. Purified washing water can also be stored and replenished.

The water treatment module 125 includes a water treatment unit that water-treats the washing water discharged from the buffer tank and returns the treated washing water to the buffer tank, a sludge tank storing sludge discharged from the water treatment unit, and a constant discharge by the water treatment unit. It may include an outboard discharge valve for discharging the washing water satisfying the conditions, and a washing water drain tank for temporarily storing the washing water from the buffer tank.

Specifically, the water treatment module 125 includes a water treatment unit 125a that treats the washing water drained from the buffer tank 124c by centrifugation or filtering, and returns the purified washing water to the buffer tank 124c. , A sludge tank 125b for storing sludge separated and discharged by the water treatment unit 125a, and an outboard discharge valve 125c for discharging washing water that satisfies a certain outboard discharge condition by the water treatment unit 125a. ), and a washing water drain tank 125d that temporarily stores washing water from the buffer tank 124c, so that wastes such as chutes contained in the washing water are separated and stored, and the separated discharge water is discharged outboard.

On the other hand, the exhaust gas cleaning stage 100 is configured to be mounted in the engine room or engine casing of the ship engine 10, and configured to be mounted in the engine room or engine casing of the ship engine 10 to provide an installation space. It is possible to save space to secure free space, and it is possible to configure the existing EGR system to be additionally installed on ships installed so that there are few changes, and it is easy to install additionally on ships where the existing EGR system is installed. have.

The greenhouse gas reduction stage 200 is interlocked with the exhaust gas cleaning stage 100 to cool the residual exhaust gas from the ship engine 10, and effectively reduce the greenhouse gas by adjusting the concentration of the circulating greenhouse gas absorption liquid. Discharge.

That is, the greenhouse gas reduction stage 200 is, as shown in FIGS. 2 and 4, the residual exhaust gas discharged from the exhaust gas receiver 110 and bypassed the cleaning unit 120 and supplied to the absorption tower 230. From the exhaust gas cooling unit 210 for cooling the gas, _{the absorbent solution manufacturing unit 220 for manufacturing and supplying a high-concentration CO 2} absorbent solution, and the exhaust gas and absorbent solution manufacturing unit 220 cooled by the exhaust gas cooling unit 210 by reacting the absorbing solution conversion of CO ₂ into an ammonium salt aqueous solution to the concentration of the absorbing solution supplied to the absorption tower 230 from the absorbent tower 230, the absorbing solution producing unit 220 is formed to remove CO ₂ added to remove the CO ₂ It consists of an absorbent liquid concentration control unit 240 to control.

The exhaust gas cooling unit 210 lowers the temperature of the exhaust gas and supplies it to the absorption tower 230 to facilitate _{the absorption of CO 2 by the absorption liquid.}

For example, the exhaust gas cooling unit 210 is exhaust gas that is discharged from the ship engine 10 and passes through the lower end of the absorption tower 230, as shown in FIG. 7(a), and is a sea chest. ) (Not shown) by sucking seawater from the outside of the ship and receiving seawater by the seawater pump 211 and controlling the injection amount through the seawater control valve 212 and the multi-stage seawater injection nozzle 213, and injecting the exhaust gas. It may be _{an SO X absorbing part that dissolves and removes SO X} while cooling and removes dust from the chute.

Here, the _{exhaust gas cooling unit 210 in the form of an SO X} absorption unit includes an exhaust gas inlet pipe 214 or an exhaust gas inlet pipe 214 in the form of a partition wall to prevent the washing water discharged to the discharge end 700 from flowing backward. It may also include an umbrella-shaped blocking plate 215 to cover.

For reference, depending on the ship's berthing or sailing, the seawater pump 211 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 according to the depth of the ship. 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.

In addition, the seawater pump 211 may be configured separately into a suction pump that sucks seawater from the outside of the ship and a seawater transfer pump that pumps and transfers seawater to the seawater control valve 212, and the seawater control valve 212 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 if it is capable of controlling the amount of seawater injection through the seawater injection nozzle 213 according to the amount of exhaust gas, It is also applicable to a type of valve.

Alternatively, the exhaust gas cooling unit 210, as shown in FIG. 7(b), circulates fresh water provided from the inboard cooling system through a heat exchange pipe surrounding the exhaust gas discharge pipe to reduce the exhaust gas at a temperature of 27°C to 33°C. It may be a fresh water heat exchanger that cools to temperature.

For example, the exhaust gas cooling unit 210 in the form of a fresh water heat exchange unit may cool the exhaust gas discharged from the ship engine 10 by a heat exchange method of fresh water, and specifically, heat exchange surrounding the exhaust gas discharge pipe through which the exhaust gas flows. By circulating the fresh water provided from the cooling system 20 in the ship through the pipe 216, the exhaust gas may be cooled to a temperature of 27°C to 33°C by a heat exchange method with the fresh water.

In other words, in the water cooling method in which the exhaust gas is directly cooled by fresh water, the concentration of the absorbent liquid is lowered due to the introduction of fresh water, and the GHG absorption performance is lowered.By improving this, the concentration of the absorbent liquid is lowered by cooling the exhaust gas by the heat exchange method. It can prevent greenhouse gas absorption performance to be kept constant.

_{The absorption liquid manufacturing unit 220 reacts fresh water and NH 3} as shown in the following [Chemical Formula 1] _{to prepare a high-concentration ammonia water (NH 4} OH (aq)), which is a high-concentration CO2 absorption liquid, and passes through the absorption liquid concentration control unit 240 to the absorption tower Supply to (230).

Specifically, the absorption liquid manufacturing unit 220, as shown in Figure 4, a fresh water tank (not shown) for storing fresh water, a fresh water control valve 221 for supplying fresh water from the fresh water tank to the ammonia water tank 223, ammonia water tank that stores injects NH ₃ supplied from the NH ₃ storage 222, the fresh water supplied by the NH ₃ storage 222, a fresh water control valve 221 to store the high pressure of NH ₃ producing a high concentration of ammonia water ( 223), a pH sensor 224 for measuring the ammonia water concentration in the ammonia water tank 223, and an ammonia water supply pump 225 for supplying high concentration ammonia water from the ammonia water tank 223 to the absorbent liquid concentration control unit 240. have.

For example, the concentration of ammonia water circulating between the absorption tower 230 and the absorption liquid regeneration stage 300 changes as the operation is repeated, but when the concentration decreases, a high concentration of ammonia water is supplied to the ammonia water circulation line (A, see Fig. 1). Thus, by compensating for the lowered ammonia water concentration, the designed ammonia water concentration can be kept constant.

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 in 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.

That is, _{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 223, and the pressure in the ammonia water tank 223 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 85 bar. Therefore, by maintaining the inside of the ammonia water tank 223 at a constant pressure using 7 bar compressed air available on board, 50% concentration of ammonia water can be stored as ammonia water. It can be stored in the tank 223.

In addition, a safety valve 226 may be installed to reduce the pressure by exhausting the ammonia water tank 223 to a safe area to prevent overpressure.

_{The CO 2} removal unit of the absorption tower 230 reacts the exhaust gas cooled by the exhaust gas cooling unit 210 with ammonia water, which is the absorption liquid from the absorption liquid manufacturing unit 220, and converts CO ₂ into an ammonium salt as shown in [Chemical Formula 2] below. Convert to an aqueous solution (NH ₄ HCO ₃ (aq)) to remove _{CO 2.}

Specifically, the CO2 removal unit, as shown in Figs. 4 and 5, the ammonia water injection nozzle 231 for injecting the ammonia water supplied from the absorption liquid concentration control unit 240 downward, CO ₂ of the exhaust gas and ammonia water as the absorption liquid 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 232 and filler 232 that converts _{CO 2 into NH 4} HCO ₃ (aq), which is an aqueous ammonium salt solution by contacting with A jacket (cooling jacket) (not shown), _{a water spray 233 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 231 A mist removal plate 234 for returning ammonia water in the direction of the filler 232, a partition wall 235 formed so that the ammonia water that has passed through the filler 232 does not flow back to the exhaust gas cooling unit 210, and surrounded by the partition wall 235 It may be composed of an umbrella-shaped blocking plate 236 covering the exhaust gas inlet hole.

Here, the cooling jacket can be cooled to 20°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 can 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, the filler 232 It 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. 11 can be selected in consideration of the contact area per unit area, the pressure drop of the gas, and the overflow rate. In addition, as illustrated in FIG. 12, the ammonia water spray nozzle 231 may be configured in the form of a ladder pipe (a) or a spray form (b).

In addition, ammonia water passes downward through the filler 232 and the exhaust gas passes upward through the filler 232 and comes 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 234 allows the scattered ammonia water to adhere to the curved multi-plate so that droplets become large, and drain in the direction of the filler material 232 by its own weight.

The absorbent liquid concentration control unit 240 is supplied from the absorbent liquid preparation unit 220 to the absorption tower 230 and adjusts the concentration of the absorbent liquid circulating along the absorbent liquid circulation line (A).

For example, when the concentration of ammonia water circulating in the absorption liquid 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} CaCO ₃ or MgCO ₃ production increases more than necessary due to absorption, the absorption liquid concentration control unit 240 must maintain a constant concentration of ammonia water to maintain the CO ₂ absorption performance of the absorption tower 230.

To implement this, the absorbent liquid concentration control unit 240 mixes the high-concentration ammonia water of the absorbent liquid preparation unit 220 and the low-concentration ammonia water circulating through the absorption liquid circulation line A to adjust the concentration of the ammonia water to 12% by mass. Although it can be designed, it is not limited thereto and may be changed according to usage conditions.

Specifically, the absorption liquid concentration control unit 240, as shown in Figure 4, a fresh water supply line 241 for supplying fresh water, a pH sensor that measures the concentration of ammonia water, which is an absorbent liquid supplied to the absorption tower 230 ( 242), the flow control valve 243 for controlling the flow rate of the high-concentration ammonia water supplied from the absorption liquid manufacturing unit 220 by the operation of the ammonia water supply pump 225, the absorption liquid according to the ammonia water concentration by the pH sensor 242 When mixing by mixing the high concentration ammonia water from the unit 220 to increase the concentration, or by mixing the fresh water of the fresh water supply line 241 to lower the concentration, the mixer 244 to adjust the concentration of the ammonia water, and the mixer 244 It may be composed of a pressure maintenance valve 245 that prevents the evaporation of NH _3.

Here, the mixer 244 may be configured in various forms as a pipe or a structure in which blades capable of causing a vortex of fluid to be smoothly mixed are disposed, and the pressure maintaining valve 245 is an outlet of the mixer 244 It is formed in and maintains a high pressure even when mixing, so that NH ₃ (g) can be prevented from evaporating and disappearing from high concentration ammonia water.

The absorption liquid regeneration stage 300 regenerates the GHG absorption liquid and returns to the GHG reduction stage 200 to circulate, but by reacting the ammonium salt aqueous solution discharged from the absorption tower 230 with the divalent metal hydroxide aqueous solution, NH ₃ is regenerated. It may be composed of an ammonia regeneration unit that returns to the absorption tower 230 to be reused as an absorption liquid.

That is, the ammonia regeneration unit reacts the aqueous ammonium salt solution discharged from the absorption tower 230 with the divalent metal hydroxide aqueous solution according to the following [Chemical Formula 3] or [Chemical Formula 4] _{to regenerate NH 3} to the absorption tower 230. It can be returned to be reused as _{a CO 2 absorbing liquid, and CO 2} can be stored or discharged in the form of carbonates of CaCO ₃ (s) or MgCO _{3 (s).}

Specifically, the ammonia regeneration unit is discharged from the storage tank 310, the absorption tower 230 for storing a divalent metal hydroxide aqueous solution (Ca(OH) ₂ or Mg(OH) _{2 ), as shown in FIG. A mixing tank 320 for generating NH 3} (g) and carbonate by stirring an aqueous ammonium salt solution and an aqueous divalent metal hydroxide solution with a stirrer, and a filter 330 for separating carbonates by suctioning the solution and precipitate from the mixing tank 320 , A high-pressure pump 340 for transferring the solution and sediment to the filter 330 at high pressure, an ammonia water storage tank storing the ammonia water (or fresh water) separated by the filter 330 and supplying it to the absorbent liquid concentration control unit 240 ( 350), ammonia water circulation pump 360 supplied from the ammonia water storage tank 350 to the absorption liquid concentration control unit 240, and the carbonate separated by the filter 330 (CaCO ₃ (s) or MgCO ₃ (s)) It may be configured as a separate storage tank (not shown) that is transferred to a slurry or a dryer (not shown) and stored in a solidified solid state.

Here, the reaction is continuously performed by a stirrer installed in the mixing tank 320, but a constant temperature may be maintained so that the reaction is smoothly performed.

In addition, in the storage tank 310, a divalent metal hydroxide aqueous solution (Ca(OH) ₂ or Mg(OH) ₂ ) is produced by reacting fresh water and a metal oxide (CaO or MgO), stored, and supplied to the mixing tank 320. Plays a role.

Through this, only a relatively inexpensive metal oxide (CaO or MgO) or a divalent metal hydroxide aqueous solution (Ca(OH) ₂ or Mg(OH) ₂ ) is added so that additional water is not added, there is no reduction in the concentration of ammonia water, and a filter ( 330), and NH ₃ recycling costs 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.

In addition, the filter 330 sucks the solution and precipitate from the mixing tank 320 and transfers NaHCO ₃ and the precipitate of other by-products at high pressure by the high pressure pump 340 to separate the carbonate and store it in a solid state or outboard. Discharge. Here, as an example of the filter 330, a membrane filter suitable for sediment separation by high-pressure fluid transfer may be applied.

In addition, the ammonia water circulation pump 360 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 through the mixer 244.

The exhaust gas circulation stage 400 circulates part of the exhaust gas purified through the greenhouse gas reduction stage 200 to the ship engine 10 to be used as combustion air, but as shown in FIG. 6, the absorption tower ( 230), a part of the purified exhaust gas is reduced by a reduction in greenhouse gas, and cooled to a certain temperature by the recirculation gas cooler 410, and the combustion air receiver is cooled by the exhaust gas control valve 420 and the exhaust gas recirculation fan 430. 130).

That is, the exhaust gas circulation stage 400 may circulate 30% to 40% of the purified exhaust gas through the greenhouse gas reduction stage 200 to the ship engine 10 to be used as combustion air. By replacing the exhaust gas circulation system, operating costs can be reduced and free space on board can be secured.

On the other hand, in Tier II mode operation, the exhaust gas circulation stage 400 prevents the backflow of the combustion air to the exhaust gas recirculation fan through a valve on the outlet side of the exhaust gas recirculation fan, and the pressure of the combustion air According to the ventilation pressure of the exhaust gas recirculation fan, the pressure of the exhaust gas from which moisture has been removed is increased to increase the pressure to recirculate, and during Tier III mode operation, a part of the exhaust gas supplied to the supercharge stage is bypassed, or Part of the compressed combustion air can be discharged to the outside or supplied for sludge drying.

For example, ECA (Emission Control Area) In the application the NO _X emissions in tier 3 (Tier Ⅲ) based drives the EGR should reduce the NO _X in the exhaust gas below the NO _X emission standard one, that is not of the EGR driving essential In the operation of the Tier II mode applied in the open sea, the exhaust gas recirculation fan 430 is prevented from flowing back to the exhaust gas recirculation fan 430 through the valve 431 at the outlet side, It is also possible to increase the pressure of the exhaust gas from which moisture has been removed by adjusting the blowing pressure of the exhaust gas recirculation fan 430 according to the pressure of the combustion air by using a variable frequency driver (VFD).

As shown in FIG. 8, the turbo charger 500 is connected to the turbine 510 rotating by the high temperature and high pressure exhaust gas supplied from the exhaust gas receiver 110 and the rotation shaft of the turbine 510. A compressor 520 that is combined and rotated to compress combustion air and supply it to the combustion air receiver 130, an air suction filter 530 formed on the inlet side of the compressor 520 to filter foreign substances, and a compressor 520 A combustion air cooling module 540 for cooling the combustion air supplied from the combustion air receiver 130 and a first control valve 550 for controlling the flow rate of exhaust gas from the exhaust gas receiver 110 to the turbine 510 ), and a second control valve 560 that is formed at the front end of the first control valve 550 and controls the flow rate of the exhaust gas to the cleaning unit 120, and uses the high-temperature and high-pressure energy of the exhaust gas. To increase engine efficiency by compressing.

On the other hand, by further including a third control valve 570 for adjusting the flow rate of the exhaust gas from the exhaust gas receiver 110 to the cleaning unit 120, due to the high load or high temperature exhaust gas, the turbine 510 When damage to an exhaust gas use-related device coupled to the exhaust gas pipe connected to the outlet side, for example, a steam generating device is expected, the exhaust gas to the cleaning unit 120 is controlled by controlling the opening and closing of the third control valve 570. It is also possible to decrease the temperature of the exhaust gas by increasing the flow rate of.

In addition, the combustion air cooling module 540 includes a one-stage or two-stage cooling jacket 541 that cools combustion air by circulating cooling water, and the combustion air passing through the cooling jacket 541 formed in a curved multi-plate shape. It is composed of a mist catcher 542 that removes moisture from the compressor 520, thereby increasing the efficiency of the supercharger and increasing the air density by lowering the temperature rise due to compression of the combustion air by the compressor 520 to improve the efficiency of the ship engine 10.

An EGE (Exhaust Gas Economizer) 600 is formed between the exhaust gas cleaning stage 100 and the greenhouse gas reduction stage 200 to exchange heat between waste heat of the ship engine 10 and boiler water.

Specifically, the EGE (600), as shown in Figure 9, a heat exchanger 610 that wraps around the exhaust gas pipe through which the high-temperature and high-pressure exhaust gas passes, and heat-exchanging steam by the heat exchanger 610 ( A secondary boiler 620 that receives a mixture in the form of steam and saturated water, separates steam by a steam drum (not shown) and supplies it to a steam consumer, and a heat exchanger 610 from the secondary boiler 620 Boiler water circulating water pump 630 that circulates and supplies boiler water to the furnace, a cascade tank 640 that recovers condensed water that has been condensed and changed phase after being consumed from a steam consumer, and a cascade tank 640. It consists of a supply pump 650 and a control valve 660 that adjusts and supplies the amount of boiler water to the boiler 620, and generates and supplies steam necessary for the heating equipment in 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 heat exchanger 610, but if not, the auxiliary boiler 620 It can also burn the fuel itself to produce the necessary steam.

As shown in FIG. 10, the discharge end 700 is a washing water tank 710 that stores washing water discharged from the absorption tower 230, and is transferred by the transfer pump 720 to the washing water tank 710. Consisting of a water treatment device 730 having a filtering unit for adjusting turbidity to meet the outboard discharge condition of washing water and a neutralizing agent injection unit for pH control, and a sludge storage tank 740 for separating and storing solid discharges, Washing water that passes through the water treatment device 730 and satisfies the outboard discharge conditions is discharged outboard by opening the outboard discharge valve 750, and solid discharges such as chutes that do not meet the outboard discharge conditions are separately separated from the sludge storage tank ( 740).

On the other hand, NaOH may be exemplified as a neutralizing agent for meeting the conditions for outboard discharge, but it is assumed that the substances discharged from the absorption tower 230 are both acidic or basic, so that these acids or basics can be neutralized, respectively, if necessary. A neutralizing agent may be selected and used.

On the other hand, the present invention can provide a ship equipped with an EGR-coupled greenhouse gas emission reduction device according to the above-described configuration.

Here, the exhaust gas cleaning stage 100 is configured in the form of being installed in the engine room or engine casing of the ship's engine 10, saving installation space, and additional installation in the form of a module on ships already installed with the existing EGR system. It can be configured so that there are few changes due to additional installation.

Therefore, by the above-described EGR-combined greenhouse gas emission reduction device of the ship and the configuration of the ship equipped with the device, while maintaining the existing EGR _{, reducing NO X} generation, which is the original purpose of EGR, as well as _{CO 2} , a representative greenhouse gas. It _{absorbs SO X} and converts it into a material that does not affect the environment, or it can be stored as a useful material to prevent corrosion of the engine and improve combustion quality, and remove _{SO X} and CO _{2 from recirculating exhaust gas.} Therefore, it is possible to prevent corrosion of the engine and reduce environmental pollution. It can be installed in the engine room or engine casing of a ship's engine to save installation space, thereby securing a free space. It can be configured to have fewer changes by allowing additional installation on the ship, and separate _{NO X , SO X} and CO ₂ from exhaust gases by converting them into substances that do not affect the environment to meet IMO greenhouse gas emission regulations. discharge, or stores the conversion into useful substances, NH _3, and to reduce the regeneration cost, and can reduce the capacity size of the rear end of the filter, CO ₂ removed in a relatively low NH ₃ and Ca (OH) ₂ or Mg (OH) ₂ Is consumed, so that the _{cost of removing CO 2} can be reduced.

In addition, by controlling the concentration of the absorbent liquid, the concentration of the absorbent liquid is kept constant to prevent the reduction of the greenhouse gas absorption performance, and by applying a pressurization system, loss of the absorbent liquid due to the natural evaporation of the high-concentration absorbent liquid can be prevented.

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.

100: cleaning stage
110: exhaust gas receiver 120: cleaning unit
130: combustion air receiver
200: Greenhouse gas reduction team
210: exhaust gas cooling unit 220: absorbent liquid manufacturing unit
230: absorption tower 240: absorption liquid concentration control unit
300: absorption liquid regeneration stage
310: storage tank 320: mixing tank
330: filter 340: high pressure pump
350: ammonia water storage tank 360: ammonia water circulation pump
400: exhaust gas circulation stage
410: recirculation gas cooler 420: exhaust gas control valve
430: exhaust gas recirculation fan
500: supercharger
510: turbine 520: compressor
530: air suction filter 540: combustion air cooling module
550: first control valve 560: second control valve
570: third control valve
600: EGE
610: heat exchanger 620: auxiliary boiler
630: boiler water circulation water pump 640: cascade tank
650: supply pump 660: control valve
700: discharge end
710: washing water tank 720: transfer pump
730: water treatment device 740: sludge storage tank
750: outboard discharge valve

Claims (23)

An exhaust gas cleaning stage for cleaning and cooling some exhaust gas from the ship engine, controlling the oxygen concentration to _{suppress the generation of NO X} , and resupplying it to the ship engine for reuse as combustion air;
A greenhouse gas reduction stage for effectively reducing and discharging greenhouse gases by interlocking with the exhaust gas cleaning stage, cooling the residual exhaust gas from the ship engine, and adjusting the concentration of the circulating greenhouse gas absorption liquid;
An absorption liquid regeneration stage for regenerating the GHG absorption liquid and returning to the GHG reduction stage for circulation; And
Including; an exhaust gas circulation stage for circulating a part of the exhaust gas purified through the greenhouse gas reduction stage to the ship engine to be used as combustion air
Vessel's EGR combined greenhouse gas emission reduction device. The method of claim 1,
The exhaust gas cleaning stage,
An exhaust gas receiver that temporarily stores exhaust gas exhausted from each cylinder of the ship engine to remove pulsation, and a part of the exhaust gas discharged from the exhaust gas receiver by spraying _{washing water to remove SO X} and the chute for cleaning, A cleaning unit that circulates coolant to cool the exhaust gas, and a combustion air receiver that temporarily stores the exhaust gas that has passed through the cleaning unit to remove pulsation, mixes with combustion air and supplies air to each cylinder of the ship engine. Including,
The GHG reduction team,
An exhaust gas cooling unit that cools the residual exhaust gas discharged from the exhaust gas receiver and bypassing the cleaning unit, an absorption liquid manufacturing unit that manufactures and supplies a _{high concentration CO 2 absorption liquid, and exhaust gas cooled by the exhaust gas cooling unit.} and the absorbing solution to adjust the concentration of the absorption liquid which is supplied with, absorption tower formed remove CO ₂ addition for removing CO ₂ by the CO ₂ by the reaction of the absorbing solution from the production unit converted to an ammonium salt solution, from the absorbing solution produced part to the absorption tower It includes an absorbent liquid concentration control unit,
The absorption liquid regeneration stage,
It includes an ammonia regeneration unit for reacting the aqueous ammonium salt solution discharged from the absorption tower with an aqueous divalent metal hydroxide solution _{to regenerate NH 3} and return to the absorption tower to be reused as an absorption liquid,
The exhaust gas circulation stage is characterized in that to recirculate a part of the exhaust gas purified through the absorption tower to the combustion air receiver,
Vessel's EGR combined greenhouse gas emission reduction device. The method of claim 2,
The cleaning unit,
A washing water supply module receiving and neutralizing fresh water to supply washing water, a washing module injecting washing water from the washing water supply module into exhaust gas from the exhaust gas receiver for cooling and washing, and cooling through cooling water Characterized in that it comprises a cooling module, a washing water circulation module for circulating the washing water that has passed through the washing module, and a water treatment module for water treatment of the polluted washing water after passing through the washing module,
Vessel's EGR combined greenhouse gas emission reduction device. The method of claim 3,
The washing water supply module includes a washing water supplement pump that supplements the washing water circulating by receiving fresh water and supplies it to the washing module, and a neutralizing agent that introduces a neutralizing agent into the washing water supplied from the washing water supplement pump to the washing module. Includes a supply valve,
The cleaning module includes at least one cleaning unit for cleaning by _{spraying cleaning water to remove SO X and a chute,}
The cooling module includes one or more cooling units formed at a lower end of the one or more cleaning units to cool the exhaust gas to a predetermined temperature by circulating cooling water,
The washing water circulation module determines the input amount of the neutralizing agent by adjusting the neutralizing agent supply valve by measuring the pH of the washing water circulation tank for collecting the washing water passing through the washing module and the washing water from the washing water circulation tank. A pH meter for monitoring to be monitored, a buffer tank for storing an initial amount of washing water and replenishing the washing water, and a washing water circulation pump for circulating a portion of washing water to the buffer tank and circulating a portion of the washing water to the washing module. ,
The water treatment module includes a water treatment unit for water treatment of the washing water discharged from the buffer tank and returning the water treated washing water to the buffer tank, a sludge tank storing sludge discharged from the water treatment unit, and the water treatment unit. It characterized in that it comprises an outboard discharge valve for discharging the washing water satisfying a certain discharge condition and a washing water drain tank temporarily storing the washing water from the buffer tank,
Vessel's EGR combined greenhouse gas emission reduction device. The method of claim 4,
It characterized in that it further comprises a washing water cooling unit installed at the rear end of the washing water circulation pump to cool the washing water circulating to reinforce the cooling of the washing water by the cooling module,
Vessel's EGR combined greenhouse gas emission reduction device. The method of claim 2,
A turbine rotating by the high-temperature and high-pressure exhaust gas supplied from the exhaust gas receiver, a compressor that is coupled to a rotating shaft of the turbine and rotates to compress combustion air and supply it to the combustion air receiver, and formed on the inlet side of the compressor An air suction filter for filtering foreign substances, a combustion air cooling module for cooling exhaust gas supplied from the compressor to the combustion air receiver, and a first control for adjusting the flow rate of exhaust gas from the exhaust gas receiver to the turbine It characterized in that it further comprises a supercharge stage, comprising a valve and a second control valve formed at a front end of the first control valve to control the flow rate of the exhaust gas to the cleaning unit,
Vessel's EGR combined greenhouse gas emission reduction device. The method of claim 6,
Further comprising a third control valve for adjusting the flow rate of the exhaust gas from the exhaust gas receiver to the cleaning unit,
When damage to the exhaust gas use-related device coupled to the exhaust gas pipe connected to the turbine is expected due to high load or high temperature exhaust gas, the third control valve is controlled to open and close to the cleaning unit. Characterized in that to lower the temperature of the exhaust gas by increasing the flow rate of the gas,
Vessel's EGR combined greenhouse gas emission reduction device. The method of claim 6,
The combustion air cooling module includes one or more cooling jackets for cooling combustion air by circulating cooling water, and a mist catcher formed in a curved multi-plate shape to remove moisture from the combustion air passing through the cooling jacket. Made by,
Vessel's EGR combined greenhouse gas emission reduction device. The method of claim 2,
The exhaust gas cooling unit,
_{It is an SO X} absorber that dissolves and removes _{SO X} while receiving seawater from the exhaust gas discharged from the ship engine and passing through the lower end of the absorption tower, spraying and cooling it,
It is characterized in that it is a fresh water heat exchange unit that cools the exhaust gas by circulating fresh water through a heat exchange pipe surrounding the exhaust gas discharge pipe,
Vessel's EGR combined greenhouse gas emission reduction device. The method of claim 9,
The CO ₂ removal unit, characterized in that for removing CO ₂ by switching the CO ₂ absorbing solution from the production unit was reacted by the exhaust gas passing through the cooling the exhaust gas and the absorption liquid with an ammonium salt solution,
Vessel's EGR combined 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 an ammonia water supply pump for supplying ammonia water from the ammonia water tank to the absorbent liquid concentration control unit.
Vessel's EGR combined greenhouse gas emission reduction device. The method of claim 11,
Injecting compressed air of a predetermined pressure into the ammonia water tank to prevent evaporation loss of _{NH 3,}
Vessel's EGR combined greenhouse gas emission reduction device. The method of claim 2,
The absorbent liquid concentration control unit,
A fresh water supply line for supplying fresh water; A pH sensor measuring the concentration of aqueous ammonia, which is an absorption liquid supplied to the absorption tower; A flow rate control valve that controls the flow rate of the ammonia water supplied from the absorbent liquid manufacturing unit; A mixer configured to increase the concentration by mixing high-concentration ammonia water from the absorption liquid preparation unit according to the ammonia water concentration by the pH sensor, or to lower the concentration by mixing fresh water from the fresh water supply line to adjust the concentration of the ammonia water; And a valve for maintaining a pressure to prevent evaporation of _{NH 3} during mixing by the mixer,
Vessel's EGR combined greenhouse gas emission reduction device. The method of claim 2,
The CO ₂ removal unit,
Ammonia water spray nozzle for spraying the ammonia water supplied from the absorbent liquid concentration control 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.
Vessel's EGR combined greenhouse gas emission reduction device. The method of claim 14,
The filler is composed of a multi-stage distillation column packing designed to have a large contact area per unit volume, and a solution redistributor is formed between the distillation column packings,
Vessel's EGR combined greenhouse gas emission reduction device. The method of claim 1,
It is formed between the exhaust gas cleaning stage and the greenhouse gas reduction stage, characterized in that it further comprises an EGE for heat exchange between the waste heat of the ship engine and boiler water,
Vessel's EGR combined greenhouse gas emission reduction device. The method of claim 2,
The ammonia 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 the aqueous ammonium salt solution and the aqueous divalent metal hydroxide solution discharged from the absorption tower with a stirrer; A filter for separating carbonate by sucking the solution and precipitate from the mixing tank; A high pressure pump for transferring the solution and precipitate to the filter at high pressure; And an ammonia water storage tank for storing the ammonia water or fresh water separated by the filter and supplying it to the absorbent liquid concentration control unit.
Vessel's EGR combined greenhouse gas emission reduction device. The method of claim 17,
The divalent metal hydroxide aqueous solution stored in the storage tank is characterized in that Ca(OH) ₂ or Mg(OH) ₂ generated by reacting fresh water and CaO or MgO,
Vessel's EGR combined greenhouse gas emission reduction device. The method of claim 9,
The exhaust gas cooling unit is an SOx absorption unit that dissolves and removes SOx while cooling the exhaust gas by receiving and spraying seawater,
A washing water tank that stores the washed water discharged from the absorption tower by dissolving and removing SOx while cooling the exhaust gas, and turbidity to meet the outboard discharge conditions of the washed water transferred by the transfer pump to the washing water tank. A water treatment device having a filtering unit for controlling the and a neutralizing agent injection unit for adjusting pH, and a sludge storage tank for separating and storing solid discharges, characterized in that it further comprises a discharge stage,
Vessel's EGR combined greenhouse gas emission reduction device. The method of claim 6,
In Tier II mode operation, the exhaust gas circulation end prevents reverse flow of combustion air to the exhaust gas recirculation fan through a valve on the outlet side of the exhaust gas recirculation fan, and according to the pressure of the combustion air By adjusting the blowing pressure of the exhaust gas recirculation fan, the pressure of the exhaust gas from which moisture has been removed is increased to recirculate it.
When operating in Tier III mode, it is characterized in that a part of the exhaust gas supplied to the supercharge stage is bypassed, a part of compressed combustion air is discharged to the outside, or is supplied for sludge drying,
Vessel's EGR combined greenhouse gas emission reduction device. The method of claim 1,
The exhaust gas cleaning stage is characterized in that it is configured to be mounted in the engine room or engine casing of the ship engine,
Vessel's EGR combined greenhouse gas emission reduction device. The method of claim 1,
The exhaust gas circulation stage is characterized in that 30% to 40% of the exhaust gas purified through the greenhouse gas reduction stage is circulated to the ship engine to be used as combustion air,
Vessel's EGR combined greenhouse gas emission reduction device. A ship equipped with an EGR-coupled greenhouse gas emission reduction device according to any one of claims 1 to 22.

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