KR20210125153A - Apparatus for reducing greenhouse gas emission in vessel - Google Patents

Abstract

Disclosed is an apparatus for reducing greenhouse gas emissions of a ship. The apparatus for reducing greenhouse gas emissions of a ship comprises: an NH_3 storage facility (110); a seawater/brine supply pump (120); an ammonia dissolving tank (130) dissolving NH_3 in seawater/brine; a sulfur oxide reduction unit (140) removing SO_X of exhaust gas emitted from a ship engine (10); a carbon dioxide reduction tank (150) spraying ammonic brine to CO_2 of SO_X-removed exhaust gas to change to NaHCO_3 to remove CO_2; and a recovery tank (170) regenerating NH_3 to supply regenerated NH_3 to the ammonia dissolving tank (130). SO_X is removed first from exhaust gas and then CO_2 is removed to increase CO_2 dissolving reaction speed to improve CO_2 removal efficiency and remove side reactions when regenerating NH_3 to prevent impurities from being included when recovering ammonia.

Description

A device for reducing greenhouse gas emissions from ships {APPARATUS FOR REDUCING GREENHOUSE GAS EMISSION IN VESSEL}

The present invention, by removing secondarily the CO ₂ after removal of the SO _X (SOx) and the chute (Soot) from the exhaust gas primarily, increasing the CO ₂ dissolved in the reaction rate and improve the CO ₂ removal efficiency, NH ₃ It relates to a device for reducing greenhouse gas emissions of ships, which can remove side reactions due _{to SO X} remaining during regeneration so that impurities are not included in the recovery of ammonia.

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

_{Accordingly, a series of technologies related to capturing and storing carbon dioxide (CO 2} ), a representative greenhouse gas, without emitting it is called CCS (Carbon dioxide Capture and Storage) technology and has recently received a lot of attention. Among CCS technologies, chemical absorption method ( chemical absorption) is the most commercialized technology among them in terms of large-scale processing possible.

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 , the technology to capture the emitted CO _{2 is attracting attention.}

For reference, among 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.} The wet absorption method has a high technological maturity in onshore plants and _{is easy to treat large amounts of CO 2} , so it can be said to be the closest capture technology to the commercialization of CCS technology, and amine-based and ammonia are mainly used as absorbents.

On the other hand, the above-mentioned technology for reducing carbon dioxide emission or capturing the generated carbon dioxide has not been commercialized in ships at present, and a method using hydrogen or ammonia as a fuel is currently being developed and is at the stage of commercialization. has not been reached.

Therefore, for ships using fossil fuels, it is necessary to convert CO ₂ out of the exhaust gas emitted from the engine of the ship into a material that does not affect the environment and apply a technology for converting it into a useful material and storing it in the ship this is raised

In particular, in a ship equipped with a scrubber to use high sulfur oil, the solubility _{of SO X} is large and it is first converted into a compound such as _{Na 2} SO ₃ , so it is difficult to remove _{CO 2} until all of the _{SO X is dissolved.} There is a problem in that the CO _{2 removal efficiency is lowered.}

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

Aspect of the of the invention idea is to remove secondarily the CO ₂ after removal of the SO _X and the chute from the exhaust gas primarily, increasing the CO ₂ dissolved in the reaction rate and improve the CO ₂ removal efficiency, NH ₃ An object of the present invention is to provide a device for reducing greenhouse gas emissions of ships that can eliminate side reactions due _{to SO X} remaining during regeneration so that impurities are not included in the recovery of ammonia.

In order to achieve the above object, the present invention, NH _{3 NH 3} storage for storing; Seawater/brine supply pump for supplying seawater or brine; An ammonia dissolution tank for forming ammoniacal brine through a dissolution process of _{NH 3} injected from the NH _{3 reservoir and seawater/brine supplied from the seawater/brine supply pump;} Sulfur oxide reduction unit to remove _{SO X} of the exhaust gas discharged from the marine engine; Carbon dioxide reduction tank that removes _{CO 2} by injecting the ammonia brine supplied from the ammonia dissolution tank to the CO _{2 of the exhaust gas from which SO X} introduced from the sulfur oxide reduction unit is removed through an injection nozzle to convert it _{to NaHCO 3} ; _{and a recovery tank for regenerating NH 3} by injecting Ca(OH) ₂ into the by- _{product of NH 4} Cl from the carbon dioxide reduction tank and supplying it to the ammonia dissolution tank.

Further, the SOx reduction unit may be by spraying the sea water to flow to the exhaust gas passage formed in the liquid trapped absorption tower to remove the SO _X from the exhaust gas by dissolving the SO _X.

Here, the sulfur oxide reduction unit includes a scrubber pump for supplying seawater and _{a sulfur oxide reduction tank for removing SO X} of exhaust gas, wherein the sulfur oxide reduction tank is formed in one end or multiple stages in which a flow path through which the exhaust gas passes is formed. It may include an intermediate plate, a porous upper plate formed on the upper end of the intermediate plate and covering the flow path, and a spray nozzle formed on the upper end of the porous upper plate to spray seawater supplied from the scrubber pump.

In this case, the sulfur oxide reduction tank may further include a fine spray catcher for blocking the inflow of _{dissolved SO X into the carbon dioxide reduction tank.}

In addition, the sulfur oxide reduction unit includes a first drain tank for storing the wash water drained from the sulfur oxide reduction tank, a water treatment system for purifying the wash water supplied from the first drain tank, and storing the sludge separated from the water treatment system. A sludge tank and a discharge pump for discharging the purified water separated from the water treatment system overboard may be further included to form an open circuit system.

In addition, the sulfur oxide reduction unit includes a first drain tank for storing the wash water drained from the sulfur oxide reduction tank, a recovery pump for recovering the wash water from the first drain tank to the sulfur oxide reduction tank, and alkali ions in the wash water or seawater. It can be made to form a closed circuit system by further including an alkali ion input unit for introducing a compound to form a.

In addition, it may be configured as a hybrid system combining the open-loop system and the closed-loop system.

Further, the ammonia dissolved in the tank, and the NH ₃ is sprayed by the lower nozzle injection from the NH ₃ reservoir, the ammonium brine through the dissolution of the sea water / brine injected by the top nozzle from the water / brine feed pump can be formed

In addition, the ammonia dissolution tank, a hollow formed inside the intermediate plate formed in one or multiple stages, a porous upper plate formed on the upper end of each intermediate plate formed in one or multiple stages to cover the hollow, is formed at the bottom It may include a cooling jacket for circulating cooling water for cooling the heat generated during the dissolution process of _{NH 3} into seawater/brine, and an exhaust port _{formed on the upper portion to exhaust undissolved excess NH 3 .}

In addition, the carbon dioxide reduction tank, an injection nozzle for injecting the ammonia brine supplied from the ammonia dissolution tank, an exhaust gas intake port formed in the lower portion to introduce exhaust gas, and excess NH _{3 from the exhaust port of the ammonia dissolution tank NH 3} intake port for reabsorption into ammonia brine by introducing it, NH _{3 catcher formed on the upper portion to catch excess NH 3} by the ammonia trapping water pump, at least one hollow plate formed at the lower end of the injection nozzle, and the at least one One or more porous top plates each covering the hollow plate, a cooling jacket that circulates cooling water for cooling the heat of exhaust gas and the heat of the chemical reaction of ammonia brine, is formed at the bottom and is produced by a chemical reaction of _{ammonia brine and CO 2} It may include an outlet for discharging the products and by-products.

Here, the injection nozzle includes an upper injection nozzle and a lower injection nozzle that branch the ammonia brine supplied from the ammonia dissolution tank to the upper and lower ends, respectively, and the one or more hollow plates and the one or more porous upper plates, A first hollow plate formed at the lower ends of the upper injection nozzle and the lower injection nozzle, respectively, and a first porous top plate covering the first hollow plate, and a second hollow plate and a second porous top plate covering the second hollow plate may include

In addition, it may further include a second drain tank for accommodating the by-product in the form of sediment discharged from the outlet at a predetermined water level.

Here, a membrane filter for separating the precipitate by sucking the product and the by-product from the outlet, a high-pressure pump for sucking the product and the by-product at high pressure through the membrane filter, and a dryer for drying the precipitate separated by the membrane filter A separator may be further included.

In addition, the recovery tank includes a first injection nozzle for spraying _{NH 4} Cl(aq) and NaCl(aq) and H ₂ 0 separated by the separator, a second injection nozzle for spraying _{Ca(OH) 2 , one} It may include one or more hollow plates and a porous upper plate covering each of the one or more hollow plates, a cooling jacket formed on the upper part to circulate cooling water, and a recovery pipe for supplying the _{regenerated NH 3 to the ammonia dissolution tank.}

_{At this time, a discharge pump for discharging the discharged material other than NH 3} regenerated from the recovery tank, a neutralizing agent storage tank for storing a neutralizing agent for neutralizing the discharged material, and a neutralizing agent supply pump for supplying the neutralizing agent from the neutralizing agent storage tank; A monitoring unit for monitoring a variable of the overboard discharge condition of the neutralized product; It may further include a wastewater treatment unit including a wastewater supply pump.

According to the present invention, the ammonia salt water spraying after the removal of the SO _X and the chute from the exhaust gas primarily to remove the CO ₂ secondarily, increase the CO ₂ dissolved in the reaction rate and improve the CO ₂ removal efficiency, NH ₃ Play _{By removing the side reaction due to the SO X} remaining in the process, impurities are not included in the recovery of ammonia, so that high-purity NH ₃ can be reused.

In addition, it is possible to reduce environmental pollution by removing _{carbon dioxide (CO 2} ) from the exhaust gas of the ship by using ammonia, which requires less energy for regeneration.

In addition, according to the present invention, it is possible to improve the efficiency of the system by using the brine that is produced when the fresh water is generated by the fresh water generator.

In addition, according to the present invention, it is possible to operate at low cost by consuming only _{calcium hydroxide (Ca(OH) 2 ) to remove carbon dioxide.}

In addition, according to the present invention, carbon dioxide (CO ₂ ) There is an effect that can be stored in a harmless solid state of sodium bicarbonate (NaHCO _{3 ) or discharged to the sea.}

1 shows a schematic configuration diagram of an apparatus for reducing greenhouse gas emission of a ship according to an embodiment of the present invention.
Figure 2 shows a circuit diagram for implementing the greenhouse gas emission reduction device of the ship of Figure 1;
3 to 7 are enlarged and separated views of the corresponding area of the circuit diagram of FIG. 2 .

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

GHG emission reduction apparatus of a ship according to an embodiment of the present invention, as a whole, NH ₃ storage unit 110, and a water / brine feed pump 120 and the ammonia dissolving tank (130 to dissolve the NH ₃ in water / brine ) and a sulfur oxide reduction unit 140 for removing _{SO X} of exhaust gas discharged from the marine engine 10, and by injecting ammoniacal brine into _{CO 2} of the exhaust gas from which _{SO X has been removed to NaHCO 3} , Including a carbon dioxide reduction tank 150 for removing CO _{2 and a recovery tank 170 for regenerating NH 3} and supplying it to the ammonia dissolution tank 130, after first removing _{SO X from the exhaust gas, CO 2} By secondary removal, CO ₂ dissolution reaction rate is increased, CO ₂ removal efficiency is improved, and _{side reactions are removed during NH 3} regeneration so that impurities are not included in the recovery of ammonia.

Accordingly, with reference to FIGS. 1 to 7 , the apparatus for reducing greenhouse gas emission of a ship according to an embodiment of the present invention will be described in detail as follows.

First, NH ₃ storage (reservoir) 110 _{stores NH 3} , as shown in FIG. 3 , a storage container 111 for accommodating _{NH 3 and a PI (} Pressure Indicator) 112, a PT (Pressure Transducer) 113 that detects the pressure in the storage container 111 and converts it into an electrical signal, and a safety valve that controls the excess pressure in the storage container 111 ) (114), and _{when the loss of NH 3} occurs, it can be compensated through the valve 115 (make up), and NH ₃ is supplied to the ammonia dissolution tank 130 through the valve 116.

Next, the seawater / brine supply pump 120, as shown in FIG. 4, supplies seawater or brine from the sea chest 124 to the ammonia dissolution tank 130, the pump 121 ) may include a CP (Control Panel) 122 that measures and adjusts the pressure and a PI 123 that displays the pressure.

Here, a first filter for protecting the pump 121 is formed at the front end of the seawater/brine supply pump 120 , and a second filter for protecting subsequent process equipment is formed at the rear end, and the mesh of the second filter is The mesh of the first filter is formed relatively densely so that the filtering performance of the second filter is better than the filtering performance of the first filter, so that foreign substances contained in seawater or brine can be sequentially filtered according to their size.

On the other hand, depending on the berthing of the ship and the sailing of the ship, depending on the depth of the water, it is possible to selectively supply seawater/brine supply pump 120 from the high sea chest that sucks the seawater at the top and the low sea chest that sucks the seawater at the bottom. have.

That is, when the ship is berthing, the high sea chest is used because the sea water at the top is cleaner than the sea water at the bottom, and the low sea chest can be used because the sea water at the bottom is cleaner than the sea water at the top when the ship sails.

Next, the ammonia dissolution tank (NH ₃ absorbing tank) 130 is formed in the form of a tank or tower to generate ammonia water, as shown in FIG. 3 , by the lower nozzle 131 from the _{NH 3 storage 110 . NH 3} (g) in the gaseous state injected and injected, and the seawater/brine supply pump 120 through the dissolution process by contact with the aqueous solution of NaCl contained in the seawater/brine sprayed by the upper nozzle 132 from the next As in [Formula 1], CO ₂ absorbent ammonia brine (ammonical brine) (NH ₄ OH (aq), ammonia water) is produced.

At this time, it is preferable that the NaCl aqueous solution is injected through the upper nozzle 132 to facilitate contact between the liquid and the gas, and the gaseous NH ₃ (g) is injected through the lower nozzle 131 .

Specifically, the ammonia dissolution tank 130 includes a middle plate 133 formed in upper and lower multi-stage with a hollow formed therein, a porous upper plate 134 formed on the upper end of the intermediate plate 133 to cover the hollow, respectively, and a lower portion It is formed in the reduced tank the cooling jacket (cooling jaket) (135) and is formed on the upper surplus NH ₃ undissolved for circulating cooling water to cool the heat generated by dissolution of a water / brine of NH ₃ CO ( 150) may include an exhaust port or an exhaust path for exhausting.

Here, the cooling jacket 135 maintains the temperature of the ammonia dissolution tank 130 at 30° C. to 50° C. in order to prevent the solubility of _{NH 3} from being reduced due to heat generation according to the dissolution process, _{so that NH 3} is saturated or An ammoniacal brine with rich NH ₃ solution in a dissolved state close to saturation may be supplied to the injection nozzle 151 .

In addition, the excess NH ₃ exhausted from the top is supplied to the NH ₃ intake port 153 to be additionally absorbed by the ammonia brine supplied to the injection nozzle 151 and injected, so that the loss of _{NH 3 can be minimized.}

In addition, a filter 136 is formed at the bottom outlet of the ammonia dissolution tank 130 to filter the ammonia brine precipitate and supply it to the spray nozzle 151, and a spray pump (spray pump) at the rear end of the filter 136 ( 137) is formed and the ammonia brine that has passed through the filter 136 is supplied to the injection nozzle 151 of the carbon dioxide reduction tank 150.

_{Next, the sulfur oxide reduction unit 140 removes SO X} (sulfur oxide) contained in the exhaust gas discharged from the marine engine 10 in advance and supplies it to the carbon dioxide reduction tank 150 at the rear end.

On the other hand, sulfur oxides reducing section 140 may be by spraying the sea water to flow to the exhaust gas passage formed in the liquid trapped absorption tower to remove the SO _X from the exhaust gas by dissolving the SO _X.

For example, as shown in FIG. 5 , when the sulfur oxide reducing unit 140 is formed as a wet absorption absorption tower, the sulfur oxide reducing unit 140 is a scrubber pump for supplying seawater from the sea chest 124 . pump) 141 and _{a sulfur oxide reduction tank 140a for removing SO X} of exhaust gas, the sulfur oxide reduction tank 140a is an intermediate plate ( 142), a porous upper plate 143 formed on the upper end of the intermediate plate 142 and covering the flow path, and a spray nozzle 144 formed on the upper porous upper plate 143 to spray seawater supplied from the scrubber pump 141. includes

Here, the scrubber pump 141 may adjust the RPM of the pump itself in order to adjust the flow rate of seawater or may be adjusted through the control valve 144a of the injection nozzle 144 side.

The porous upper plate 143 may have an arc-shaped cross section around the flow path of the intermediate plate 142 in order to facilitate contact between the gaseous exhaust gas and the liquid seawater.

In addition, the sulfur oxide reduction tank (140a) further includes a fine spray catcher (water mist catcher) 145 formed in the middle of the communication path to the carbon dioxide reduction tank 150 _{, the dissolved SO X to the carbon dioxide reduction tank 150} It can also be done to block the inflow.

In addition, the first drain tank 146 for storing washing water or drain water drained from the bottom of the sulfur oxide reduction tank 140a and the washing water supplied from the first drain tank 146 are purified A water treatment system 147 to, a sludge tank 148 for storing the sludge separated from the water treatment system 147, and a discharge for discharging purified water separated from the water treatment system 147 overboard A pump 149a may be further included to form an open circuit system.

Here, the wash water contains ionic compounds of chute, NaSO ₃ , Na ₂ SO ₄ , MgCO ₃ or MgSO ₄ ^{in addition to SO 3} - and SO ^{4 -.}

That is, the seawater is sprayed on the exhaust gas _{to dissolve SO X} in the exhaust gas and discharged to the overboard, but the water treatment system 147 separates the washing water into sludge and purified water to meet the overboard emission standards of turbidity, acidity and aromatic compound concentration, , purified water is outboard by the discharge pump (149a), and the sludge can be discharged outboard through the sludge overboard pump (149b) at the port when entering the port.

Alternatively, a first drain tank 146 for storing the washing water drained from the bottom of the sulfur oxide reduction tank 140a, and a recovery pump for recovering the washing water from the first drain tank 146 to the sulfur oxide reduction tank 140a ( (not shown) and a compound that forms alkali ions in washing water or seawater, for example, an alkali ion input unit (not shown) for injecting a basic chemical of NaOH or MgO to form a closed circuit system.

On the other hand, the closed-loop system entails additional chemical consumption, but has the advantage that the amount of circulating seawater is small, and the open-loop system has the advantage of no additional chemical consumption and simple, so it can be configured as a hybrid system combining an open circuit and a closed circuit. .

_{Accordingly, SO X} is first removed through the sulfur oxide reduction unit 140 and then _{CO 2} is subsequently removed, so that the solubility of _{SO X} is high, so that it is first converted into a compound such as _{Na 2} SO ₃ so that all of _{the SO X is dissolved.} until it is possible to by the removal of CO ₂ to a difficult problem improve the removal efficiency of CO _2.

Next, the carbon dioxide reduction tank (CO _{2 reduction tank) 150 removes CO 2} by contacting the exhaust gas _{from which SO X} introduced from the sulfur oxide reduction unit 140 is removed with ammonia brine, that is, the marine engine 10 ) by injecting ammonia brine supplied from the ammonia dissolution tank 130 _{to the CO 2} contained in the exhaust gas introduced from the injection nozzle 151 to convert it _{to NaHCO 3} to remove _{CO 2 .}

Specifically, as shown in Figure 6, the carbon dioxide reduction tank 150, the upper injection nozzle (151a) and the lower injection that branch the ammonia brine supplied from the ammonia dissolution tank 130 to the upper and lower ends, respectively. The nozzle 151b, the exhaust gas intake port 152 formed at the lower portion and through which the exhaust gas is introduced from the sulfur oxide reducing unit 140, and the surplus NH ₃ from the exhaust port of the ammonia dissolution tank 130 are introduced into the ammonia brine _{NH 3} intake port 153 to be reabsorbed _{, and NH 3} catcher 155 formed on the upper portion to catch _{excess NH 3 by NH 3} capturing water pump 154, and the upper end The first hollow plate 156a and the first hollow plate 156a formed at the lower ends of the injection nozzle 151a and the lower injection nozzle 151b, respectively, the first porous upper plate 156b, and the second hollow plate 157a and a second porous upper plate 157b that covers the second hollow plate 157a, a cooling jacket 158 for circulating cooling water for cooling the heat of exhaust gas and the heat of chemical reaction of ammonia brine, and is formed in the lower part It may include an outlet 159 for discharging products and by-products produced by the chemical reaction of ammonia brine and CO _{2 .}

Here, it is possible to maximize the contact area between the exhaust gas and the ammonia brine by branching the ammonia brine to the upper and lower portions by the upper injection nozzle 151a and the lower injection nozzle 151b, respectively, and spraying.

On the other hand, the exhaust gas may be inhaled from the exhaust gas intake 152 at the lower portion of the carbon dioxide reduction tank 150 and discharged to the upper portion of the carbon dioxide reduction tank 150 , the NH ₃ catcher 155 is an ammonia collecting water pump 154 . Absorbs _{NH 3} discharged without reacting with ammonia brine by seawater or fresh water sprayed by

That is, the carbon dioxide reduction tank 150 produces the _{final products NaHCO 3} and NH ₄ Cl by the following [Formula 2] or [Formula 3] by the chemical reaction of _{ammonia brine with NH 3} and H _{2 0.}

Accordingly, through the outlet 159, the product of NaHCO ₃ (S) + NH ₄ Cl(aq) + H ₂ O + NaCl _{due to the above chemical reaction, and Na 2} SO ₄ and CaCO ₃ and Mg(OH) ₂ and Fe(OH) ₃ by-products are discharged as a mixture of solution and precipitate.

On the other hand, the ESD (Emergency Shut Down) module 159-1 detects the insufficient level of ammonia water, that is, ammoniacal brine in the carbon dioxide reduction tank 150 by a level switch (not shown), so that the water level is below the reference value. If the CO ₂ cannot be removed, the operation of the carbon dioxide reduction tank 150 is urgently shut down to protect the system.

In addition, the second drain tank 159-2 receives the sediment-type by-products transported by gravity from the outlet 159 and discharged at a predetermined water level, and circulates the cooling water by a cooling jacket (not shown). The temperature is lowered so that the precipitate is precipitated as much as possible.

In addition, although not shown, the bottom surface of the second drain tank 159 - 2 may be inclined or may be prevented from being deposited on the bottom surface by an agitator.

In addition, as shown in FIG. 7 , the separator 160 sucks the product and by-product from the second drain tank 159-2 and passes the precipitate with the aqueous solution passing through the membrane by reverse osmosis pressure. and the membrane filter 161 for separating a not solid, the membrane filter 161 and the high-pressure pump 162 to the suction of the product and by-product at a high pressure, a membrane filter NaHCO ₃ separated by passing through a 161 (s) and Na ₂ SO ₄ And CaCO ₃ And Ma(OH) ₂ And Fe(OH) _{3 It} includes a dryer (dryer) 163 for drying the precipitate.

On the other hand, when a separate dryer 163 is not required, a bypass valve may be installed so as to be connected to the outboard discharge pipe after being sent directly to the recovery tank 170 to be described later.

Next, the recovery tank (NH ₃ recovery tank) 170 is supplied to the ammonia dissolution tank 130 by injecting Ca(OH) _{2 to NH 4 Cl from the separator 160 to regenerate NH 3 .}

Specifically, as shown in FIG. 7 , the recovery tank 170 has a first injection nozzle that sprays _{NH 4} Cl(aq), NaCl(aq), and H _{2 0 separated in the middle by the separator 160 .} (171), _{the second injection nozzle 172 for mixing and spraying Ca(OH) 2} (s) and Ca(OH) ₂ (aq), the upper and lower multi-stage hollow plates 173 and the porous upper plate respectively covering the hollow plates 174 , a cooling jacket 175 formed on the upper portion to circulate cooling water, and _{a recovery pipe 176 for supplying the regenerated NH 3} to the ammonia dissolution tank 130 to reuse it.

_{Accordingly, by regenerating NH 3} present in the solution in the form of NH 4 Cl by the following [Formula 4], it is possible to save cost by reusing relatively expensive NH _{3 .}

Here, NH ₃ is supplied to the ammonia dissolution tank 130, and CaCl ₂ and NaCl(aq) are discharged overboard.

On the other hand, the wastewater treatment unit 180, as shown in FIG. 7, _{a discharge pump 181 for discharging CaCl 2} (aq) and NaCl (aq) _{from the recovery tank 170, and CaCl 2} ( aq) and a neutralizing agent that neutralizes NaCl (aq), for example, a neutralizing agent tank 182 for storing NaOH, and a neutralizing agent supply pump for supplying a neutralizing agent from the neutralizing agent storage tank 182 (neutralizing agent) pump) 183, a monitoring unit 184 for monitoring variables of the overboard discharge condition of the neutralized product, and a waste water storage tank for storing products that do not meet the overboard discharge condition by the monitoring unit 184 tank) 185 and a wastewater circulation pump 186 for returning the wastewater from the wastewater storage tank 185 to the second drain tank 159-2.

Here, although NaOH has been described as an example as a neutralizing agent for meeting the overboard emission standards, it is assumed that the material discharged from the recovery tank 170 is acidic or basic, and if necessary, each of these acids or basics can be neutralized. A neutralizing agent may be selected and used.

In addition, the discharge pump 181 allows the monitoring unit 184 to discharge the fluid discharged from the recovery tank 170 that meets the overboard discharge condition overboard (A), or the fluid that does not meet the overboard discharge condition is stored as wastewater It is stored in the tank 185 (B), and the wastewater is recirculated to the second drain tank 159-2 by the wastewater circulation pump 186 and filtered by the separator 160 .

Next, the fresh water generator 190, as shown in FIG. 4 , a fresh water generation drainage pump (FWGEN.ejector pump) 191 for supplying seawater from the sea chest 124, and fresh water By heating the seawater introduced by the generation drain pump 191 under low pressure with the waste heat of the ship's main engine, the necessary fresh water and fresh water in the ship generate seawater, that is, brine, by the heater 192 and the heater 192. It includes a brine collection tank 193 that collects brine from which fresh water has evaporated, and brine can be supplied from the brine collection tank 193 to the seawater/brine supply pump 120 .

Here, brine, which is seawater from which fresh water is evaporated, has a higher concentration than general seawater, so _{it is more suitable for removing CO 2} and is stored in the brine collection tank 193 and used.

Therefore, by the configuration of the GHG emission reduction apparatus of the ship as it described above, by injecting the ammonia salt after removal of the SO _X and suits primarily from the exhaust gas by removing CO ₂ secondarily, CO ₂ dissolved in the reaction rate the increase improve CO ₂ removal efficiency, it can be to prevent so as not to remove the side reaction caused by the sO _X remaining playback NH ₃ include when ammonia recovery impurities to reuse high-purity NH _3, the energy required for reproduction _{It can reduce environmental pollution by removing carbon dioxide (CO 2} ) from the exhaust gas of a ship by using a small amount of ammonia, and improves efficiency by using brine that is by-product when generating fresh water in the fresh water generator, and calcium hydroxide (Ca(OH) ₂ ) It can be operated at low cost by consuming only the carbon dioxide and can be stored as a solid or discharged to the sea as _{harmless sodium bicarbonate (NaHCO 3 ).}

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 within the scope equivalent to the present invention are possible by those of ordinary skill in the art to which the present invention pertains. Accordingly, the true scope of protection of the present invention should be defined by the following claims.

110: NH ₃ storage 111: storage container
112: PI 113: PT
114: safety valve 115: valve
116: valve 120: seawater / brine supply pump
121: pump 122: CP
123: PI 124: Sea Chest
130: ammonia dissolution tank 131: lower nozzle
132: upper nozzle 133: middle plate
134: porous top plate 135: cooling jacket
136: filter 137: spray pump
140: sulfur oxide (SO _X ) reduction unit 140a: sulfur oxide reduction tank
141: scrubber pump 142: middle plate
143: porous top plate 144: spray nozzle
145: fine atomization catcher 146: first drain tank
147 water treatment system 148 sludge tank
150: carbon dioxide (CO ₂ ) reduction tank 151: injection nozzle
152: exhaust gas intake port 153: NH ₃ intake port
154: ammonia capture water pump 155: NH ₃ catcher
158: cooling jacket 159: exhaust port
160: separator 161: membrane filter
162: high pressure pump 163: dryer
170: recovery tank 171: first injection nozzle
172: second injection nozzle 173: hollow plate
174: porous top plate 175: cooling jacket
176: return pipe 180: wastewater treatment unit
181: discharge pump 182: neutralizer storage tank
183: neutralizing agent supply pump 184: monitoring unit
185: wastewater storage tank 186: wastewater circulation pump
190: fresh water generator 191: fresh water generation drainage pump
192: heater 193: brine collection tank

Claims (15)

NH ₃ storage to store NH ₃ ;
Seawater/brine supply pump for supplying seawater or brine;
An ammonia dissolution tank for forming ammoniacal brine through a dissolution process of _{NH 3} injected from the NH _{3 reservoir and seawater/brine supplied from the seawater/brine supply pump;}
Sulfur oxide reduction unit to remove _{SO X} of the exhaust gas discharged from the marine engine;
Carbon dioxide reduction tank that removes _{CO 2} by injecting the ammonia brine supplied from the ammonia dissolution tank to the CO _{2 of the exhaust gas from which SO X} introduced from the sulfur oxide reduction unit is removed through an injection nozzle to convert it _{to NaHCO 3} ; and
_{A recovery tank for regenerating NH 3} by injecting Ca(OH) ₂ into the by- _{product of NH 4} Cl from the carbon dioxide reduction tank and supplying it to the ammonia dissolution tank; including, a device for reducing greenhouse gas emissions of ships. The method of claim 1,
The sulfur oxide reduction unit, characterized in that formed as a wet collection absorption tower that removes _{SO X} from the exhaust gas by dissolving _{SO X} by injecting seawater into the passage through which the exhaust gas passes, the greenhouse gas emission reduction device of the ship. 3. The method of claim 2,
The sulfur oxide reduction unit includes a scrubber pump for supplying seawater and a sulfur oxide reduction tank for removing _{SO X of exhaust gas,}
The sulfur oxide reduction tank includes a middle plate formed in one or multiple stages having a flow path through which the exhaust gas passes, a porous upper plate formed on the upper end of the intermediate plate and covering the flow path, and a porous upper plate formed on the upper end of the scrubber pump. A device for reducing greenhouse gas emissions of ships, characterized in that it includes a spray nozzle for spraying the supplied seawater. 4. The method of claim 3,
The sulfur oxide reduction tank, the greenhouse gas emission reduction device of the ship, characterized in that it further comprises a fine spray catcher for blocking the inflow of the _{dissolved SO X into the carbon dioxide reduction tank.} 3. The method of claim 2,
The sulfur oxide reduction unit includes a first drain tank for storing wash water drained from the sulfur oxide reduction tank, a water treatment system for purifying the wash water supplied from the first drain tank, and sludge for storing the sludge separated from the water treatment system. A tank and a discharge pump for discharging purified water separated from the water treatment system overboard to form an open circuit system, the apparatus for reducing greenhouse gas emissions of ships. 3. The method of claim 2,
The sulfur oxide reduction unit includes a first drain tank for storing the wash water drained from the sulfur oxide reduction tank, a recovery pump for recovering the wash water from the first drain tank to the sulfur oxide reduction tank, and alkali ions in the wash water or seawater. A device for reducing greenhouse gas emissions of ships, characterized in that it further comprises an alkali ion input unit for inputting a compound to form a closed circuit system. 7. The method according to claim 5 or 6,
A device for reducing greenhouse gas emissions of a ship, characterized in that it is composed of a hybrid system combining the open circuit system and the closed circuit system. The method of claim 1,
The ammonia dissolution tank,
_{Characterized in that the ammonia brine is formed through the dissolution process of NH 3} injected by the lower nozzle from the NH ₃ reservoir and the seawater/brine injected by the upper nozzle from the seawater/brine supply pump, of greenhouse gas emission reduction devices. The method of claim 1,
The ammonia dissolution tank,
An intermediate plate with a hollow formed on the inside and formed in one or multiple stages,
a porous upper plate formed on the upper end of each intermediate plate formed in one end or multiple stages to cover the hollow;
A cooling jacket that is formed at the bottom and circulates the cooling water that cools the heat generated in the process of dissolving _{NH 3 into seawater/brine,}
Formed on the upper portion, characterized in that it comprises an exhaust port for exhausting the _{undissolved surplus NH 3, the greenhouse gas emission reduction device of the ship.} The method of claim 1,
The carbon dioxide reduction tank,
an injection nozzle for spraying ammonia brine supplied from the ammonia dissolution tank;
an exhaust gas intake port formed at the lower portion and through which exhaust gas is introduced;
_{An NH 3} intake _{port for introducing excess NH 3} from the exhaust port of the ammonia dissolution tank to be reabsorbed into the ammonia brine;
_{NH 3} catcher formed on the upper part to catch _{excess NH 3} by the ammonia trapping water pump,
One or more hollow plates formed at the lower end of the injection nozzle and one or more porous upper plates respectively covering the one or more hollow plates;
A cooling jacket that circulates cooling water that cools the heat of exhaust gas and the heat of chemical reaction of ammonia brine;
Formed in the lower portion, the greenhouse gas emission reduction device of the ship, characterized in that it comprises an outlet for discharging products and by-products generated by the chemical reaction of _{ammonia brine and CO 2 .} 11. The method of claim 10,
The spray nozzle is
It includes an upper injection nozzle and a lower injection nozzle for branching the ammonia brine supplied from the ammonia dissolution tank to the upper and lower ends, respectively, and
The at least one hollow plate and the at least one porous top plate,
A first hollow plate formed on the lower ends of the upper injection nozzle and the lower injection nozzle, respectively, and a first porous top plate covering the first hollow plate, and a second hollow plate and a second porous top plate covering the second hollow plate It characterized in that it comprises, the greenhouse gas emission reduction device of the ship. 11. The method of claim 10,
The apparatus for reducing greenhouse gas emission of a ship, characterized in that it further comprises a second drain tank for accommodating the by-product in the form of sediment discharged from the outlet at a predetermined water level. 13. The method of claim 12,
A separator comprising a membrane filter for separating the precipitate by sucking the product and the by-product from the outlet, a high-pressure pump for sucking the product and the by-product at high pressure through the membrane filter, and a dryer for drying the precipitate separated by the membrane filter A device for reducing greenhouse gas emissions of a ship, characterized in that it further comprises a. 14. The method of claim 13,
The recovery tank,
A first injection nozzle for spraying _{NH 4} Cl(aq), NaCl(aq), and H ₂ 0 separated by the separator,
Ca(OH) ₂ The second injection nozzle for spraying,
One or more hollow plates and a porous top plate covering the one or more hollow plates, respectively;
A cooling jacket formed on the upper part to circulate the coolant, and
Regenerated NH ₃ Characterized in that it comprises a recovery pipe for supplying the ammonia dissolution tank, the greenhouse gas emission reduction device of the ship. 15. The method of claim 14,
A discharge pump for discharging exhaust materials other than _{NH 3} regenerated from the recovery tank;
A neutralizing agent storage tank for storing a neutralizing agent that neutralizes the discharged material;
a neutralizing agent supply pump for supplying the neutralizing agent from the neutralizing agent storage tank;
a monitoring unit for monitoring a variable of the overboard discharge condition of the neutralized product;
a wastewater storage tank for storing products that do not satisfy the overboard discharge condition by the monitoring unit;
The apparatus for reducing greenhouse gas emissions of ships, characterized in that it further comprises a wastewater treatment unit comprising a wastewater supply pump for returning wastewater from the wastewater storage tank to the drain tank.

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