KR20170030982A - Apparatus for reducing air pollutant - Google Patents

Abstract

According to an embodiment of the present invention, an exhaust pollutant reducing apparatus includes: exhaust gas pipes supplying the exhaust gas from a combustion engine; seawater supply pipes receiving seawater from the outside; washing water supply pipes branching from the seawater supply pipes to supply washing water; a scrubber which sprays the washing water being supplied through the washing water supply pipes to the exhaust gas input through the exhaust gas pipes; a purification unit which is connected to the exhaust gas pipes, seawater supply pipes, or scrubber and generates a neutralizing agent for neutralizing the acidified washing water or an oxidizing agent for oxidizing hydrogen and nitrogen-based oxides by using the electrolysis of seawater; a fuel cell module receiving hydrogen from the purification unit to generate electricity; and washing water discharging pipes discharging the washing water in the scrubber.

Description

[0001] Apparatus for reducing air pollutant [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an exhaust pollutant abatement device, and more particularly, to an exhaust pollutant abatement device capable of purifying and discharging contaminants contained in exhaust gas of a combustion engine.

Generally, various engines installed on a ship generate power by burning fossil fuels. At this time, the exhaust gas generated in the combustion process of the fuel includes harmful substances such as SOx, NOx, and PM, It can cause pollution.

For these reasons, environmental regulations for air pollution of vessels are being strengthened, and various processing devices are being applied to ships in order to satisfy various regulations. In the environmental regulations on air pollution, regulations that specify the sulfur content in the exhaust gas emitted from the engine when operating and docking the marine emission control area (ECA) are less than 0.1% A wet scrubber is generally used to remove the cargo. The wet scrubber removes sulfur oxides by gas-liquid contact with seawater, fresh water or alkaline solution and exhaust gas.

However, since the conventional system needs to have a separate power unit for driving the system for purifying the exhaust gas, not only the installation and maintenance cost of the system increases, but also a large installation space is required for the arrangement of the system, There is a problem that space utilization is lowered.

Korean Patent Publication No. 10-2014-0123665 2014. 10. 23.

An object of the present invention is to provide an exhaust pollutant abatement apparatus capable of purifying and discharging contaminants contained in exhaust gas of a combustion engine.

The technical objects of the present invention are not limited to the technical matters mentioned above, and other technical subjects not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided an exhaust pollutant reduction apparatus comprising: an exhaust gas pipe for supplying exhaust gas from a combustion engine; a seawater supply pipe for receiving seawater from the outside; A scrubber for spraying the washing water supplied through the washing water supply pipe to the exhaust gas flowing through the exhaust gas pipe, and a steam generator connected to the exhaust gas pipe, the seawater supply pipe or the scrubber, A purification unit for generating hydrogen and a neutralizing agent for neutralizing an oxidizing agent or an acidified cleaning water for oxidizing the nitrogen-containing cargo, a fuel cell module for generating electricity by receiving the hydrogen from the purification unit, And a rinse water discharge pipe for discharging the rinse water therein.

The fuel cell module may supply the generated electricity to the purifying unit.

And a pump for pressurizing the seawater to the seawater supply pipe and supplying the seawater to the scrubber, wherein the fuel cell module can supply electricity to the pump.

In the exhaust pollutant abatement apparatus, the fuel cell module may further include a battery module that stores generated electricity.

The exhaust pollutant abatement device may further include an electrolyte tank disposed in the seawater inflow pipe branched from the seawater supply pipe and connected to the scrubber to supply electrolyte to the seawater.

The electrolyte may be sodium chloride.

The oxidizing agent may be sodium hypochlorite or hypochlorous acid produced by electrolyzing seawater.

The neutralizing agent may be a sodium hypochlorite or sodium hypochlorite dilution produced by electrolysis of seawater.

According to the present invention, the nitrogen monoxide contained in the exhaust gas is oxidized with the oxidizing agent generated in the purification unit for electrolyzing seawater, and at the same time, the cleaning water acidified with the neutralizing agent generated in the same purification unit is neutralized, Not only the cost is reduced but also the space utilization in the ship can be increased.

In addition, the hydrogen generated by the electrolysis of seawater in the purification unit is supplied to the fuel cell module to generate electricity, and the generated electricity is used as a drive source of the purification unit and other devices, thereby enabling the system to operate more efficiently .

1 is a schematic view of an exhaust pollutant reduction apparatus according to an embodiment of the present invention.
Fig. 2 is an enlarged cross-sectional view of the purifying unit of Fig. 1. Fig.
FIG. 3 is an enlarged view of the fuel cell module of FIG. 1. FIG.
4 and 5 are operation diagrams of an exhaust pollutant abatement apparatus according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an exhaust pollutant reduction apparatus according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5. FIG.

The apparatus for reducing exhaust pollutants according to an embodiment of the present invention reduces the concentration of various pollutants (nitrogen oxides, sulfur oxides, dusts, etc.) contained in exhaust gases to discharge air suited to exhaust standards, Which can be treated at the same time, can remove contaminants of the exhaust gas, which is mainly mounted on the ship and generated in the ship.

The exhaust pollutant abatement device is a device for oxidizing nitrogen monoxide contained in an exhaust gas with an oxidizing agent generated in a purification unit for electrolyzing seawater and neutralizing the cleansing water acidified with a neutralizing agent generated in the same purification unit, And the maintenance cost as well as space utilization in the ship can be increased. In addition, the hydrogen generated by the electrolysis of seawater in the purification unit is supplied to the fuel cell module to generate electricity, and the generated electricity is used as a drive source of the purification unit and other devices, thereby enabling the system to operate more efficiently There is a feature that can be.

Hereinafter, the exhaust pollutant abatement apparatus will be described in detail with reference to Figs. 1 to 3. Fig.

FIG. 1 is a view schematically showing an exhaust pollutant abatement apparatus according to an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of the purification unit of FIG. 1, Fig.

The exhaust pollutant abatement device 1 according to the present invention includes an exhaust gas pipe 10, a seawater supply pipe 20, a cleaning water supply pipe 30, a scrubber 40, a purification unit 50, A module 90, and a rinse water discharge pipe 41.

The exhaust gas pipe 10 is connected to a scrubber 40, which will be described later, as a pipe through which exhaust gas moves from a combustion engine (not shown). The exhaust gas pipe 10 is directly connected to the exhaust pipe of the combustion engine and can be a passage through which exhaust gas of high temperature is directly transferred or passed through various heat exchangers to recycle most of the exhaust heat and the remaining waste gas moves. Here, the combustion engine is an apparatus that generates various kinds of power required for the ship by burning fuel, and may be formed of, for example, a main engine, a generator engine, or the like. Exhaust pipes of a plurality of combustion engines may be connected to the exhaust gas pipe 10, and a plurality of combustion engines may selectively operate as needed. Such a combustion engine usually generates fossil fuel to generate power, and thus generates exhaust gas resulting from combustion of fossil fuel. The generated exhaust gas contains a large amount of nitrogen oxides, sulfur oxides and dusts, and is supplied to the scrubber 40 through the exhaust gas pipe 10 connected to one side of the combustion engine.

The seawater supply pipe 20 is a pipe through which seawater is supplied from the outside, and at least one pump P1 for pressurizing the seawater is installed to smoothly supply the seawater to the scrubber 40. However, the seawater supply pipe 20 is not limited to supplying the seawater to the scrubber 40, and may also supply seawater to a ballast water tank (not shown) if necessary.

The first control valve 25 is connected to the connecting portion between the seawater supply pipe 20 and the cleaning water supply pipe 30, Can be installed. The first control valve 25 is formed in the form of a three-way valve so as to control the amount of seawater supplied through the cleansing water supply pipe 30 or the seawater supplied from the cleansing water supply pipe 30 and the sea water supply pipe 20 It is possible to control the ratio of the seawater flowing through. In the seawater supply pipe 20, the mixing pipe 22 and the sea water discharge pipe 23 are connected in sequence to the rear end of the washing water supply pipe 30. In the mixing pipe 22, the electrolysis-completed seawater flows from the purification unit 50 to be described later. (23) The seawater discharge pipe 23 can discharge the seawater to the outside.

The cleaning water supply pipe 30 is connected to the seawater supply pipe 20 or the fresh water supply pipe 26 at one end thereof for supplying the scrubber 40 with at least one of seawater or fresh water or mixed water of seawater and fresh water And the other end may be connected to the scrubber 40. That is, the washing water supply pipe 30 can selectively receive seawater and fresh water. The process of supplying seawater mainly through the cleansing water supply pipe 30 and supplying the scrubbing water to the scrubber 40 is mainly described below.

The seawater flowing from the outside through the sea water supply pipe 20 flows through the washing water supply pipe 30 and is supplied to the scrubber 40. The scrubber 40 is an apparatus for spraying cleaning water supplied through the cleaning water supply pipe 30 to the exhaust gas flowing through the exhaust gas pipe 10 to make the exhaust gas and the cleaning water undergo gas-liquid contact. The scrubber 40 is a conventional wet scrubber ). At this time, the cleaning water supply pipe 30 is disposed at the upper part of the scrubber 40 at the end located inside the scrubber 40, and is branched into a plurality of sprays to spray the cleaning water in the form of fine particles. That is, the washing water supply pipe 30 disposed at the upper portion of the scrubber 40 sprayes the washing water toward the lower portion of the scrubber 40 where the exhaust gas pipe 10 is located, thereby effectively contacting the exhaust gas and the washing water . As the exhaust gas and washing water come into contact with the inside of the scrubber 40, contaminants such as nitrogen oxides, sulfur oxides, and dusts contained in the exhaust gas can be removed, and contaminants such as nitrogen oxides, sulfur oxides, The removed exhaust gas can be discharged to the outside through a separate discharge pipe (42). Since the exhaust gas discharged through the discharge pipe 42 is in a state in which contaminants such as nitrogen oxides, sulfur oxides, and dust have been removed, the exhaust gas can be discharged into the atmosphere in accordance with the exhaust standards.

Cleaning water containing nitrogen oxides, sulfur oxides, dust and the like comes into contact with the exhaust gas containing contaminants in the scrubber 40 and is discharged to the outside of the scrubber 40 through the washing water discharge pipe 41.

On the other hand, the purifying unit 50 generates a neutralizing agent for neutralizing the hydrogen, the oxidizing agent for oxidizing the nitrogen-calculating cargo, or the acidified cleaning water by electrolyzing the seawater. The purifying unit 50 is provided with an exhaust gas pipe 10 or a seawater supply pipe 20, (Not shown). In other words, the purifying unit 50 can supply the oxidizing agent or the neutralizing agent to the exhaust gas pipe 10 or the sea water supply pipe 20 or the scrubber 40. In addition, the purifying unit 50 may electrolyze the seawater to make a germicide. The sterilizing agent thus generated is supplied to the scrubber 40 and the seawater supply pipe 20 through the second injection pipe 57 and the third injection pipe 58 to sterilize the microorganisms in the seawater. Thereafter, the sterilized seawater is checked for the amount of excess oxidant in the sensor unit 24 before it is discharged to the ocean through the sea water discharge pipe 23. At this time, when excess oxidizing agent is contained in seawater, sodium thiosulfate is added to lower the amount of oxidizing agent and released into the ocean.

The purifying unit 50 includes an electrolytic bath 51, a positive electrode plate 52a and a negative electrode plate 52b, and a rectifier 53.

Referring to FIG. 2, the electrolytic bath 51 is accommodated in a vessel or chamber in which a receiving space is formed, through which the sea water supplied through the sea water supply pipe 20 is received. The electrolytic bath 51 is connected to a sea water inflow pipe 21 branched from the sea water supply pipe 20 at one side to receive seawater and at least one pump P2 is installed on the sea water inflow pipe 21, Can be smoothly supplied to the electrolytic bath (51). In the electrolytic bath 51, a positive electrode plate 52a and a negative electrode plate 52b are provided.

The positive electrode plates 52a and the negative electrode plates 52b are disposed in the electrolytic bath 51 in the direction of the flow of seawater and spaced apart from each other at regular intervals. A diaphragm 54 formed of a hydrophilic porous film is provided between the positive electrode plate 52a and the negative electrode plate 52b. The electrolytic bath 51 has a first region 51a in which the positive electrode plate 52a is located, And the second region 51b where the negative electrode plate 52b is located. However, the diaphragm 54 is not limited to being formed of a hydrophilic porous membrane, and may be deformed into a membrane having various structures or the diaphragm 54 may be omitted if necessary. The positive electrode plate 52a and the negative electrode plate 52b are electrically connected to the rectifier 53 through a cable.

The rectifier 53 supplies the rectified current to the positive electrode plate 52a and the negative electrode plate 52b, respectively. Although the rectifier 53 is shown on the outside of the electrolytic bath 51 in the drawing, the present invention is not limited thereto. For example, the rectifier 53 may be installed inside the electrolytic bath 51.

In the electrolytic bath 51, sodium chloride (NaCl) contained in the seawater is electrolyzed by the current supplied from the rectifier 53, whereby the chlorine gas (Cl2) is oxidized in the positive electrode plate 52a, And hydrogen gas (H2) and hydroxyl group (OH-) are generated in the negative electrode plate (52b). At this time, chlorine gas (Cl 2) and hydroxyl group (OH -) chemically react with each other to produce sodium hypochlorite (NaOCl) and hypochlorous acid (HOCl), which have strong oxidizing power. The concentration measuring sensor 55 for measuring the concentration of the generated oxidizing agent or the sterilizing agent or the neutralizing agent is provided in the electrolytic bath 51 so that the rectifier 53 is connected to the concentration value measured by the concentration measuring sensor 55 The current intensity can be adjusted.

Specifically, the following reaction occurs in the positive electrode plate 52a.

In the negative electrode plate 52b, the following reaction occurs.

In conclusion,

That is, the oxidizing agent may be sodium hypochlorite (NaOCl) or hypochlorous acid (HOCl) produced by electrolysis of seawater, and the purifying unit 50 is connected to the exhaust gas pipe 10 through the first injection pipe 56, Can be sprayed in a liquid phase into fine particles. Specifically, the purifying unit 50 can oxidize the nitrogen monoxide contained in the exhaust gas into nitrogen dioxide by injecting the oxidizing agent into the exhaust gas pipe 10 through the first injection pipe 56. Since the nitrogen dioxide is easily dissolved in water as compared with the nitrogen monoxide, it can be easily removed from the scrubber 40 by dissolving in the washing water. The first injection pipe 56 can atomize the liquid oxidizing agent into the exhaust gas pipe 10 and spray the liquid oxidizing agent to the exhaust gas through a separate spray unit 11 provided in the exhaust gas pipe 10. The atomizing unit 11 can be atomized, dropletized, or vaporized using a nozzle, an ultrasonic vibrator, a spray, a heating plate, or the like.

The purifying unit 50 may be a diluent of sodium hypochlorite (NaOCl) or sodium hypochlorite (NaOCl) produced by electrolysis of seawater and the purifying unit 50 may be a diluent of the scrubber 40 ). ≪ / RTI > Specifically, the neutralizing agent can neutralize the cleansing water that has been acidified by reacting nitrogen oxides (NOx) and sulfur oxides (SOx) with the washing water. (NOx) and sulfur oxides (SOx) react with seawater to generate nitric acid (HNO3) and sulfuric acid (H2SO4), respectively. Therefore, the purifying unit 50 injects sodium hypochlorite (NaOCl) into the scrubber 40 So that the acidified cleaning water can be neutralized. Inside the scrubber 40, the following reaction occurs.

Sodium hypochlorite (NaOCl) reacts with nitric acid (HNO3) and sulfuric acid (H2SO4) to generate hypochlorous acid (HOCl), so that the microorganisms contained in the washing water can be sterilized. At this time, since hypochlorous acid (HOCl) has a weak acidic component, a separate neutralizing agent such as sodium sulfite (Na2S₂O₃) and sodium hydroxide (NaOH) may be added.

The purifying unit 50 injects sterilizing agent into the seawater supply pipe 20 through the third inlet pipe 58 to sterilize the microorganisms in the seawater discharged to the sea through the mixing pipe 22 and the seawater discharge pipe 23 The purifying unit 50 can directly inject a neutralizing agent (NaOH) into the scrubber 40 through the second injection pipe 57 and the neutralization of the washing water with the neutralizing agent supplied from the purifying unit 50 If it is not enough, a separate neutralizing agent injection unit (not shown) may be added to pass the secondary neutralization step.

Since the hydrogen produced by the electrolysis of seawater is very low in solubility in water (hydrogen solubility: 0.0016 g / kg), it is easily separated from water through a separate gas-liquid separator (not shown) And the fuel cell module 90 can generate electricity by receiving oxygen supplied from the purifier unit 50 and oxygen. For example, the fuel cell module 90 may be formed of a polymer electrolyte fuel cell that is operated at a low temperature of 50 ° C to 200 ° C and is suitable for small capacity output. A polymer electrolyte fuel cell is a fuel cell that uses a polymer membrane having hydrogen ion exchange characteristics as an electrolyte. The fuel cell has high power generation efficiency, high output density, and fast response to load changes. However, the fuel cell module 90 is not limited to being formed of a polymer electrolyte fuel cell, and may be modified into various fuel cells operating at low temperatures. For example, the fuel cell module 90 may be formed of a phosphoric acid type fuel cell.

The fuel cell module 90 generates electricity by receiving air containing oxygen and hydrogen. Here, air is not limited to general air, which is generally obtained in a natural state, and is composed of about 80% nitrogen and about 20% oxygen. The concentration of oxygen may be higher or lower than that of general air, Some of the materials may be included. That is, air can be collectively referred to as a gas containing oxygen necessary for the fuel cell module 90.

Referring to FIG. 3, a fuel electrode 90a and an air electrode 90b may be formed in the fuel cell module 90. The fuel electrode 90a is supplied with the hydrogen supplied from the purification unit 50 and can be formed on one side of the fuel cell module 90. [ The air electrode 90b is supplied with exhaust gas containing air or oxygen containing oxygen or oxygen, and may be formed on the other side of the fuel cell module 90. The hydrogen supplied to the fuel electrode 90a and the oxygen supplied to the air electrode 90b chemically react to generate electricity, and the reaction formula between hydrogen and oxygen is as follows.

In the fuel electrode 90a, electrical oxidation of hydrogen (H2) as a fuel occurs, and hydrogen ions (2H +) and electrons 2e- move to the air electrode 90b. The hydrogen ions 2H + move from the fuel electrode 90a to the air electrode 90b through the polymer membrane located between the fuel electrode 90a and the air electrode 90b while the electrons 2e- move from the fuel electrode 90a to the air electrode 90b. From the fuel electrode 90a to the air electrode 90b through an electric circuit that connects the air electrode 90b to the outside. Electrochemical reduction of oxygen (O 2), which is an oxidizing agent, takes place in the air electrode 90b. Finally, oxygen (O 2) reacts with hydrogen ions (2H +) and electrons (2e-) to change into water (H 2 O). At the same time, DC power is generated, and incidental heat is also generated. The generated DC power can be used as the power of the DC motor, or it can be used as an AC power by the inverter.

The electricity generated through this process is supplied to the purifier unit 50, the pump P1 installed on the sea water supply pipe 20, the pump P2 installed on the sea water inflow pipe 21, It can be used as a power source for other facilities. When electricity generated from the fuel cell module 90 is supplied to the purifying unit 50, electricity can be used as a part of the power source necessary for electrolyzing seawater.

A battery module 100 for storing generated electricity may be provided on one side of the fuel cell module 90. Electricity stored in the battery module 100 may be supplied to various uses as needed.

An electrolyte tank 110 may be provided on the seawater inlet pipe 21 branched from the seawater supply pipe 20 or the sea water supply pipe 20 to supply the electrolyte to the seawater. In this case, the electrolyte may be NaCl . Vessels operate worldwide, and depending on the sea area, the concentration of salt contained in seawater may be different. Particularly, when the concentration of the salt contained in the seawater is too low, the electrolysis in the neutralization unit 50 is not smoothly carried out, so that an oxidizing agent or a neutralizing agent having an appropriate concentration is not generated, It may happen that it can not be done. The electrolytic tank 110 for supplying the electrolyte on the seawater supply pipe 20 or the seawater inflow pipe 21 is provided so that electrolysis is smoothly performed in the neutralization unit 50 even when seawater containing sodium chloride is introduced Whereby an oxidizing agent or a neutralizing agent can be easily produced.

The washing water discharge pipe 41 is a pipe for discharging the washing water in the scrubber 40 and may be connected to the sea water supply pipe 20 through the filter unit 60. That is, the washing water discharge pipe 41 can separate the solid particles contained in the washing water through the filter unit 60, and then discharge it to the outside. The washing water discharge pipe 41 is not necessarily connected to the sea water supply pipe 20, but may be connected to the outside of the ship independently.

A circulation pipe (81) can be connected to the washing water discharge pipe (41). The circulation pipe 81 is a tube through which the washing water discharged through the washing water discharge pipe 41 is recirculated to the washing water supply pipe 30. When the washing water is not required to be discharged to the outside, Can be circulated and reused.

A recirculation tank 80 may be provided between the washing water discharge pipe 41 and the circulation pipe 81. The recycle tank 80 can store a part of the washing water discharged through the scrubber 40 and can serve as a buffer tank so that a certain amount of washing water can be circulated through the circulation pipe 81 have.

The recirculation tank 80 may include any one of a centrifugal separator, a gravity separator, and a filter to separate the solid phase particles contained in the washing water and recirculate the washing water through the circulation tube 81.

The cleaning water supply pipe 30 is connected to the sea water supply pipe 20, the fresh water supply pipe 26 and the circulation pipe 81 so that the concentration of the exhaust gas, the treatment capacity of the scrubber 40, The seawater, the fresh water, and the circulating water may be suitably mixed and supplied to the scrubber 40 in consideration of this.

The filter unit 60 is disposed at the rear end of the scrubber 40 and separates the solid particles contained in the washing water discharged from the scrubber 40. The filter unit 60 includes a centrifugal separator, The solid phase particles may be separated and discharged to the sludge tank 70 by using at least one of them. The filter unit 60 can be connected to the seawater supply pipe 20 between the pump P1 and the first control valve 25. [ That is, the seawater supplied from the seawater supply pipe 20 is supplied to the scrubber 40 through the cleaning water supply pipe 30 after passing through the filter unit 60, and the washing water, which has passed through the scrubber 40, (60). That is, both the seawater introduced from the outside and the washing water passing through the scrubber 40 can be filtered by one filter unit 60. It is also possible to use one or two filter units 60 in which the contained particles in the washing water passing through the washing water discharge pipe 41 or the seawater passing through the sea water supply pipe 20 are used commonly or independently .

The neutralizing agent or the sterilizing agent may be injected into the washing water or seawater having passed through the filter unit 60 and the filter unit 60 through the third injection pipe 58. A mixing pipe 22 may be provided between the filter unit 60 and the seawater discharge pipe 23 to discharge mixed water of seawater and washing water and the third injection pipe 58 may be connected to the sea water supply pipe 20 or the mixing pipe 22). The sensor unit 24 is provided on the seawater discharge pipe 23 so that at least one of the total residual oxidant, the pH value, and the microbial concentration contained in the discharged washing water and seawater can be grasped in real time. The sensor unit 24 may be, for example, a TRO (Total Residual Oxidant) sensor, and the purifying unit 50 may adjust the amount of the oxidizing agent, the neutralizing agent, and the sterilizing agent according to the result of the sensor unit 24.

The washing water and the seawater discharged through the mixing pipe 22 are discharged to the outside through the sea water discharge pipe 23.

Hereinafter, with reference to Figs. 4 and 5, the operation process of the exhaust pollutant abatement apparatus 1 will be described in more detail.

4 shows an open loop system in which seawater supplied to a sea water supply pipe is directly discharged to the outside after passing through a scrubber, and FIG. 5 is a view showing an open loop system in which seawater supplied to a sea water supply pipe passes through a scrubber, And a closed loop system in which the gas is recirculated through the gas supply pipe.

4, a part of the seawater introduced through the seawater supply pipe 20 is supplied to the scrubber 40 through the cleansing water supply pipe 30, and the remaining part of the seawater is supplied to the purification unit 40 through the seawater inflow pipe 21. [ (50). The washing water is sprayed on the upper part of the scrubber 40, and the washing water can be filled in the lower part of the scrubber 40 at a certain water level. At this time, the exhaust gas supplied through the exhaust gas pipe 10 can be injected from the lower portion of the scrubber 40.

The purifying unit 50 can oxidize nitrogen monoxide to nitrogen dioxide by injecting the oxidizing agent generated by electrolyzing the seawater before the exhaust gas is supplied to the scrubber 40. The purifying unit 50 can jet the neutralizing agent together with the seawater supply pipe 20 or the scrubber 40 in consideration of the pH value of the washing water.

On the other hand, the exhaust gas can be injected in the washing water filled in the lower part of the scrubber 40, whereby contaminants such as nitrogen oxides, sulfur oxides and dust can be primarily removed. In addition, contaminants can be removed from the scrubber 40 by the washing water sprayed on the scrubber 40. Through this process, the pollutants in the exhaust gas are removed, and the exhaust gas from which the pollutants have been removed is discharged to the outside through the discharge pipe 42.

The washing water having passed through the scrubber 40 contains contaminants such as nitrogen oxides, sulfur oxides and dusts and moves to the filter unit 60 through the washing water discharge pipe 41. The filter unit 60 separates contaminants such as solid particles in the washing water and stores them in the sludge tank 70. The cleansing water from which contaminants are separated is discharged to the outside through the sea water discharge pipe 23. At this time, when the total residual oxidizing agent amount and the pH value of the washing water passing through the sea water discharge pipe 23 measured by the sensor unit 24 are out of the reference value, sodium thiosulfate is injected into the mixing pipe 22 The neutralizing agent produced in the purifying unit 50 is injected into the scrubber 40 through the injection pipe 57 to adjust the total amount of the residual oxidizing agent and the pH value within the standard value and then discharged to the outside.

Hydrogen generated by the electrolysis of seawater in the purifying unit 50 is supplied to the fuel cell module 90 and electricity generated in the fuel cell module 90 is supplied to the purifying unit 50 or the pumps P1 and P2 May be used as a power source or may be stored in the battery module 100.

Meanwhile, when the seawater containing sodium chloride is introduced through the seawater supply pipe 20, the electrolyte tank 110 can supply the electrolyte to the seawater flowing through the seawater inlet pipe 21.

5, some of the seawater introduced through the seawater supply pipe 20 is supplied to the scrubber 40, and a part of the seawater is supplied to the purifier unit 50. [ The washing water that has passed through the scrubber 40 and discharged to the washing water discharge pipe 41 is temporarily stored in the recirculation tank 80 and then circulated to the washing water supply pipe 30 through the circulation pipe 81. That is, the process of FIG. 5 is substantially the same as the process of FIG. 4 except that the washing water is recycled through the circulation pipe 81.

The seawater flowing through the seawater supply pipe 20 sequentially circulates through the wash water supply pipe 30, the scrubber 40, the wash water discharge pipe 41, the recirculation tank 80 and the circulation pipe 81, , pH value, etc., the process of FIG. 4 and the process of FIG. 5 can be performed in parallel. The process of FIG. 5 can be used when the seawater can not be discharged to the outside, such as when passing through an area where the discharge of seawater is restricted. If the washing water is highly contaminated by recirculating the washing water again, it is possible to remove the solid particles through the filter unit 60 and discharge the washing water to the outside, and to supply the new sea water to the scrubber 40 again.

4 and 5 may be selectively or sequentially used as needed.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

1: exhaust pollutant abatement device
10: Exhaust gas pipe 11: Spray unit
20: Sea water supply pipe 21: Sea water supply pipe
22: mixing tube 23: seawater discharge pipe
24: sensor part 25: first control valve
26: fresh water supply pipe 30: cleaning water supply pipe
40: scrubber 41: washing water discharge pipe
42: discharge pipe 50: purifying unit
51: electrolysis tank 52a: positive electrode plate
52b: negative electrode plate 53: rectifier
54: diaphragm 55: density measuring sensor
56: first injection tube 57: second injection tube
58: third injection tube 60: filter unit
70: sludge tank 80: recirculation tank
81: Circulation tube 90: Fuel cell module
90a: fuel electrode 90b: air electrode
100: Battery module 110: Electrolyte tank

Claims (8)

An exhaust gas pipe for supplying exhaust gas of a combustion engine;
A seawater supply pipe for receiving seawater from the outside;
A washing water supply pipe branched from the sea water supply pipe to supply wash water;
A scrubber for spraying cleaning water supplied through the cleaning water supply pipe to the exhaust gas flowing through the exhaust gas pipe;
A purifying unit connected to the exhaust gas pipe or the seawater supply pipe or the scrubber to electrolyze the seawater to generate a neutralizing agent for neutralizing hydrogen, an oxidizing agent for oxidizing the nitrogen-containing cargo, or an acidified washing water;
A fuel cell module that receives the hydrogen from the purification unit and generates electricity; And
And a rinse water discharge pipe for discharging rinse water inside the scrubber. The exhaust pollutant abatement apparatus according to claim 1, wherein the fuel cell module supplies generated electricity to the purification unit. The apparatus according to claim 1, further comprising a pump for pressurizing seawater to supply the seawater to the scrubber,
And the fuel cell module supplies electricity to the pump. The exhaust pollutant abatement apparatus according to claim 1, wherein the fuel cell module further comprises a battery module that stores generated electricity. The exhaust pollutant abatement apparatus according to claim 1, further comprising an electrolyte tank disposed in the seawater inlet pipe branched from the seawater supply pipe and connected to the scrubber to supply electrolyte to the seawater. The apparatus according to claim 5, wherein the electrolyte is sodium chloride. The exhaust pollutant abatement device according to claim 1, wherein the oxidant is sodium hypochlorite or hypochlorous acid produced by electrolyzing seawater. The exhaust pollutant abatement device according to claim 1, wherein the neutralizing agent is a diluent of sodium hypochlorite or sodium hypochlorite produced by electrolyzing seawater.

Images