KR101834483B1 - Apparatus for reducing pollutant - Google Patents

Abstract

A pollutant abatement device is provided. The pollutant abatement apparatus includes a plasma purification unit that receives exhaust gas from a combustion engine through a gas supply pipe, discharges pulse corona to oxidize the exhaust gas and generates ozone, and a plasma purification unit connected to the plasma purification unit, And a moisture removing unit for removing moisture of the water.

Description

[0001] Apparatus for reducing pollutant [0002]

The present invention relates to a pollutant abatement apparatus, and more particularly, to a pollutant abatement apparatus capable of maximizing purification of pollutants 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% As a method for removal of cargo, ultra low sulfur fuel having a sulfur content of 0.1% or less may be used or a wet scrubber may be applied. However, since the ultra low-sulfur oil is very expensive and the system such as the production equipment is insufficient, a wet scrubber is usually used. A wet scrubber removes sulfur oxides by vapor-liquid contact with seawater, fresh water or alkaline solution and exhaust gas. Oxidation of sulfur oxides and nitrogen oxides before gas-liquid contact can reduce sulfur oxides and nitrogen oxides at the same time.

Thus, a plasma apparatus was provided at the front end of the scrubber to oxidize sulfur oxides and nitrogen oxides in the exhaust gas in advance, and then supplied to the scrubber. However, in the conventional system, water in the liquid state contained in the exhaust gas, condensed water generated by condensation of the gaseous state in operation, etc., flows into the plasma apparatus, causing electric shorts such as short-circuit and short- , Causing malfunction and failure of the apparatus.

Japanese Unexamined Patent Publication No. 2008-307489.

SUMMARY OF THE INVENTION The present invention provides a pollutant abatement apparatus capable of maximizing the purification of pollutants 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.

The pollutant abatement apparatus according to the present invention includes: a plasma purification unit that receives exhaust gas from a combustion engine through a gas supply pipe, discharges pulse corona to oxidize the exhaust gas and generates ozone; And a moisture removal unit connected to the plasma purification unit to remove moisture inside the plasma purification unit.

The plasma purification unit includes a pair of first electrodes arranged in parallel to each other in a plate shape, a pair of connection plates arranged in parallel to each other to connect the pair of first electrodes, And at least one reaction module including a plurality of second electrodes arranged along the flow direction of the exhaust gas in the shape of a connecting wire.

The moisture removal unit may include a guide bar formed at a corner where the first electrode and the connection plate meet and connected to a groove extending in the flow direction of the exhaust gas so as to absorb and move moisture in the reaction module have.

The guide bar may be formed of a hydrophilic material.

The guide bar further includes at least one auxiliary guide bar disposed on both sides along the flow direction of the exhaust gas and interposed between the pair of guide bars for guiding the water inside the reaction module to the guide bar .

The auxiliary guide bar may be formed of a hydrophilic material and may be inserted into a fixing groove formed inside the first electrode.

The moisture removal unit may include a dehumidifying unit connected to the gas supply pipe to absorb or evaporate moisture contained in the exhaust gas supplied to the plasma purification unit.

The moisture removal unit may include a thermal insulation unit surrounding the outer side of at least one of the gas supply pipe and the plasma purification unit and maintaining the temperature.

And a scrubber for supplying the exhaust gas oxidized in the plasma purification unit and spraying the washing water supplied through the washing water supply pipe to make the exhaust gas and the washing water gas-liquid contact with each other.

According to the present invention, it is possible to minimize the inflow of water in the liquid state into the plasma purification unit, and to quickly remove water even when moisture is introduced. Therefore, it is possible to prevent an electrical short circuit such as a short circuit or a short circuit due to the influx of water, thereby preventing malfunction and failure of the apparatus, thereby maximizing purification of pollutants.

1 is a block diagram schematically showing a configuration of a pollutant abatement apparatus according to an embodiment of the present invention.
2 is a view schematically showing a state in which the water removal unit is formed in the pollutant abatement device of FIG.
3 is a view showing a state in which the moisture removal unit is formed inside the plasma purification unit.
FIG. 4 is a view for explaining the process of removing moisture inside the plasma purification unit.
5 and 6 are operation diagrams for explaining the operation of the pollutant abatement apparatus.
7 is a view showing a state in which a moisture removal unit according to another embodiment of the present invention is formed inside a plasma purification unit.
8 is a block diagram schematically showing a configuration of a pollutant abatement apparatus according to another 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, a pollutant abatement apparatus according to an embodiment of the present invention will be described in detail with reference to Figs. 1 to 6. Fig.

The pollutant abatement apparatus according to an embodiment of the present invention is an apparatus capable of reducing the concentration of various pollutants (nitrogen oxides, sulfur oxides, dust, etc.) contained in exhaust gases and discharging air suited to exhaust standards. And the like.

The pollutant abatement device minimizes the inflow of water in the liquid state into the plasma purification unit, and can quickly remove water even when water is introduced. Therefore, it is possible to prevent an electrical short circuit such as a short circuit or a short circuit due to the influx of water, thereby preventing the malfunction and malfunction of the apparatus, thereby maximizing the purification of pollutants.

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

FIG. 1 is a block diagram schematically showing the configuration of a pollutant abatement apparatus according to an embodiment of the present invention. FIG. 2 is a view schematically showing a state where a pollutant abatement unit is formed in the pollutant abatement apparatus of FIG. 1 And Fig. 3 is a view showing a state in which the water removal unit is formed inside the plasma purification unit.

The pollutant abatement apparatus 1 according to the present invention includes a plasma purification unit (not shown) that receives exhaust gas from a combustion engine (not shown) through a gas supply pipe 10 and performs pulse corona discharge to oxidize exhaust gas and generate ozone And a water removing unit 30 connected to the plasma purifying unit 20 and removing moisture inside the plasma purifying unit 20.

The gas supply pipe 10 is a pipe for supplying exhaust gas discharged from a combustion engine (not shown), and is connected to a scrubber 40 to be described later. The gas supply pipe 10 is directly connected to the exhaust pipe of the combustion engine so that the hot exhaust gas can be 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 refers to a device that generates various kinds of power required for a ship by burning fuel, and may be formed of, for example, a main engine, a generator engine, or the like. The exhaust pipe of a plurality of combustion engines may be connected to the gas supply pipe 10, and a plurality of combustion engines may be selectively operated 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, dust and the like and is supplied to the scrubber 40 through the exhaust pipe connected to one side of the combustion engine and the gas supply pipe 10.

On the gas supply pipe 10, a plasma purification unit 20 is connected.

The plasma purification unit 20 is a device for generating pulse corona discharge to oxidize the exhaust gas and generate ozone, and is connected to the gas supply pipe 10 between the combustion engine and the scrubber 40. When the corona discharge is caused by the pulse high voltage, the plasma purification unit 20 generates an oxidizing radical and ozone such as OH, O, and H, and the generated oxidizing radical and ozone become nitrogen oxide It is possible to remove contaminants such as sulfur oxides. 3, the plasma purification unit 20 includes a pair of first electrodes 21 arranged in parallel to each other in a plate shape, and a pair of first electrodes 21 arranged in parallel with each other, And a plurality of second electrodes 22 arranged along the flow direction of the exhaust gas in the form of a wire connecting between the pair of connection plates 23 and the connection plate 23 for connection.

The first electrodes 21 are formed in a plate shape, and a pair of the first electrodes 21 are disposed in parallel with each other, and may be formed of a metal material. The second electrode 22 is formed of a wire-shaped metal material and is disposed between the pair of first electrodes 21 and arranged in a direction perpendicular to the flow direction of the exhaust gas. The pair of connection plates 23 are arranged in parallel with each other to connect the pair of first electrodes 21, and may be formed of a non-conductive material. The connecting plate 23 may be formed of a water-repellent material that does not allow water to penetrate the surface. The plasma purification unit 20 is capable of directly purifying the exhaust gas passing between the first electrode 21 and the second electrode 22 and oxidizing the nitrogen oxide contained in the exhaust gas, It can be dissolved. The plasma purification unit 20 may also inject ozone into the injection unit 100, which will be described later, to kill the microorganisms contained in the sea water discharged into the sea.

The plasma purification unit 20 can reduce the pollutants in the exhaust gas by reacting the exhaust gas according to the following reaction formula.

<Reaction Scheme>

NO + O -> NO ₂

NO + H ₂ O -> NO ₂ + OH

NO + OH -> HNO ₂

HNO ₂ + OH -> NO ₂ + H ₂ O

NO + O ₃ -> NO ₂ + O ₂

NO ₂ + OH -> HNO ₃

SO ₂ + OH -> HSO ₃

HSO ₃ + OH -> H ₂ SO ₄

SO ₂ + O - > SO ₃

SO ₃ + H ₂ O -> H ₂ SO ₄

A water removal unit (30) is connected to the plasma purification unit (20). The connection at this time means that the plasma cleaning unit 20 is coupled to or installed outside the plasma purification unit 20 so that moisture can be removed, and there is no need to limit the installation position or the formation method. The water removal unit 30 removes moisture inside the gas supply pipe 10 or the plasma purification unit 20 and is installed inside the plasma purification unit 20 as shown in FIG. As shown in FIG. 2 (b), the gas supply pipe 10 is provided on the gas supply pipe 10 at the front end of the plasma purification unit 20, or is connected to the gas supply pipe 10 and the plasma purification And can be installed to surround the entire unit 20.

2 (b), when the water removal unit 30 is installed on the gas supply pipe 10, the water removal unit 30 is included in the exhaust gas supplied to the plasma purification unit 20 And a dehumidifying unit for absorbing or evaporating the moisture. The dehumidifying unit may be formed of, for example, a demister for absorbing and removing moisture, a heater for evaporating and removing water, and the like. Since the water removal unit 30 is formed as a dehumidifying unit, the moisture contained in the exhaust gas can be absorbed or evaporated before the exhaust gas is supplied into the plasma purification unit 20, so that the plasma purification unit 20 smoothly operates can do.

2 (c), when the water removal unit 30 surrounds the entire gas supply pipe 10 and the plasma purification unit 20, or the gas supply pipe 10 or the plasma purification unit 20 The water removal unit 30 may be formed as a thermal insulation unit that keeps the temperature constant. The insulating unit may be formed of, for example, a thermal insulating material having a low thermal conductivity and good heat resistance. The moisture removal unit 30 is formed as a thermal insulation unit so that the exhaust gas flowing through the gas supply pipe 10 or the exhaust gas flowing into the plasma purification unit 20 can be maintained at a high temperature of about 120 to 130 ° C, As a result, the moisture contained in the exhaust gas may exist as gaseous water vapor. That is, the water contained in the exhaust gas may not exist in a liquid phase but exist as water vapor, so that the plasma purification unit 20 can operate smoothly.

Referring again to FIG. 3, the water removal unit 30 can be installed inside the plasma purification unit 20, particularly, within each reaction module 20a, as described above. When the water removal unit 30 is installed inside the reaction module 20a, the water removal unit 30 is formed at the corner where the first electrode 21 and the connection plate 23 meet and extends in the flow direction of the exhaust gas And a guide bar 32 connected to the grooves (first grooves and second grooves to be described later) for absorbing and moving moisture inside the reaction module 20a. Specifically, the moisture removal unit 30 may include a first groove 31a, a second groove 31b, and a guide bar 32.

The first groove 31a is partially formed inside the first electrode 21 and may extend in the flow direction of the exhaust gas. Specifically, the first grooves 31a may be formed on both side edge portions contacting the connecting plate 23, respectively. The first groove 31a is formed only on the first electrode 21 disposed on the lower side, but the present invention is not limited thereto. For example, the first groove 31a may include a pair of first electrodes 21 Respectively.

The second groove 31b is partially formed inwardly of the connecting plate 23 and extends in the flow direction of the exhaust gas, and can communicate with the first groove 31a. In other words, the second grooves 31b are formed at both side edge portions contacting with the first electrode 21, and one side communicates with the first groove 31a. The second groove 31b is formed only on the lower portion of the connecting plate 23 but the present invention is not limited thereto. For example, the second groove 31b may be formed on the upper and lower portions of the connecting plate 23 .

The guide bar 32 absorbs and moves the moisture inside the reaction module 20a and is connected to the first groove 31a at one side and to the second groove 31b at the other side. For example, the guide bar 32 may be connected in such a manner that one side is inserted into the first groove 31a or the other side is inserted into the second groove 31b. In other words, the guide bar 32 connects the first groove 31a and the second groove 31b, absorbs and collects the moisture introduced into the reaction module 20a, moves it to the outside of the reaction module 20a, do. The guide bar 32 may be formed of, for example, a hydrophilic material. The guide bar 32 is formed of a hydrophilic material so that water contained in the exhaust gas and introduced into the reaction module 20a as well as moisture generated in the reaction module 20a are guided to the guide bar 32 to be absorbed and / And may move along the guide bar 32 and be discharged outside the reaction module 20a. That is, the guide bar 32 provides a passage for discharging the moisture inside the reaction module 20a to the outside of the reaction module 20a. At this time, an inclined surface or a groove may be formed in the guide bar 32 to allow the condensed water to be discharged more quickly. As described above, the connection plate 23 is formed of a water-repellent material. Therefore, moisture inside the reaction module 20a can be guided to the guide bar 32 side along the surface of the connection plate 23 without stagnation. Although the guide bar 32 is illustrated as being formed in the shape of 'a' on the drawing, the shape of the guide bar 32 may be variously modified.

On the other hand, the exhaust gas that has passed through the plasma purification unit 20 is supplied to the scrubber 40 through the gas supply pipe 10.

The scrubber 40 is a device for spraying the cleaning water supplied through the cleaning water supply pipe 50 to the oxidized exhaust gas in the plasma purification unit 20 to make the exhaust gas and the cleaning water under gas-liquid contact. The scrubber 40 is a wet scrubber scrubber. The scrubber 40 serves not only to purify the exhaust gas passing through the plasma purification unit 20 but also to remove the microorganisms present in the washing water when the seawater is used as the washing water. That is, the washing water passes through the scrubber 40, and microorganisms are killed and discharged to the outside of the ship, or may be supplied to another use place, for example, a ballast tank or the like, if necessary. In other words, sulfuric acid (H ₂ SO ₄ ) and nitric acid (HNO ₃ ), which exhibit strong acid, are formed while sulfur oxide and nitrogen oxide contained in the exhaust gas are dissolved in the washing water in the scrubber 40, Microorganisms can be killed. At this time, ozone generated in the plasma purification unit 20 is contained in the exhaust gas, so that the germicidal power by ozone can maximize the killing effect of microorganisms included in the washing water.

The sulfuric acid (H ₂ SO ₄ ) and nitric acid (HNO ₃ ) generated in the scrubber 40 can be neutralized by the neutralizing agent supplied from the neutralizing agent supply unit 60. At this time, the neutralizing agent may be an alkaline solution, that is, sodium hydroxide (NaOH) or sodium hypochlorite (NaOCl), and may be obtained by electrolyzing seawater or the like. That is, the neutralizing agent supply unit 60 may simply include a neutralizing tank or may include an electrolytic device to directly produce the neutralizing agent. The neutralizing agent supply unit 60 can supply the neutralizing agent to the scrubber 40 or a downstream end of the mixing pipe 54 to be described later. When the neutralizing agent supply unit 60 directly supplies the neutralizing agent to the scrubber 40, the cleaning water can be adjusted to be in contact with the exhaust gas in succession. That is, after the exhaust gas comes into contact with the washing water first, the microorganisms in the washing water are killed by sulfuric acid and nitric acid, and then the neutralizing agent is mixed with the washing water and neutralized so as to have a proper pH. In this way, the process of removing the contaminants contained in the exhaust gas inside the scrubber 40, killing the microorganisms contained in the washing water, and neutralizing the washing water can be performed at once.

The cleaning water supply pipe 50 is connected to the seawater supply pipe 51 or the fresh water supply pipe 52 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 is connected to the scrubber 40. That is, the washing water supply pipe 50 can selectively receive seawater and fresh water. Hereinafter, the process of limiting the number of wash water mainly to seawater and supplying seawater to the scrubber 40 through the wash water supply pipe 50 will be described more specifically.

At least one pump 51a is installed in the sea water supply pipe 51 to smoothly supply the washing water to the scrubber 40. Particularly, the cleansing water supply pipe 50 is branched from the sea water supply pipe 51 and connected to the scrubber 40, and a control valve 51b may be installed at a connection portion between the cleansing water supply pipe 50 and the sea water supply pipe 51 have. The control valve 51b 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 50 or the seawater supplied from the cleansing water supply pipe 50, It is possible to control the ratio of the seawater flowing through the water tank 51.

The cleaning water supply pipe 50 is disposed at an upper end of the scrubber 40 at an upper end of the scrubber 40 and is branched into a plurality of stages to spray the cleaning water in a particulate form. That is, the washing water supply pipe 50 disposed at the upper portion of the scrubber 40 sprayes the washing water toward the lower portion of the scrubber 40 where the gas supply pipe 10 is located, whereby the exhaust gas and the washing water can effectively contact each other have. 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 through the washing water discharge pipe 41. The washing water discharge pipe 41 is a pipe for discharging the washing water in the scrubber 40 and can be connected to the sea water supply pipe 51 through the filter unit 70 again. That is, the washing water discharged to the washing water discharge pipe 41 passes through the filter unit 70 and can be discharged to the sea after the solid particles are separated. However, the washing water discharge pipe 41 is not limited to being connected to the sea water supply pipe 51, and may be independently connected to the outside of the ship.

The filter unit 70 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 70 may be a solid- After the particles are separated, they can be discharged to the sludge tank 80. The filter unit 70 can be connected to the seawater supply pipe 51 between the pump 51a and the control valve 51b. That is, the seawater supplied from the seawater supply pipe 51 is supplied to the scrubber 40 through the filter unit 70, and the washing water that has passed through the scrubber 40 can pass through the filter unit 70 again. In other words, both the seawater introduced from the outside and the washing water passing through the scrubber 40 can be filtered by one filter unit 70. However, the present invention is not limited thereto. For example, the filter unit 70 may be branched into two to filter seawater externally introduced and wash water passed through the scrubber 40, respectively.

A recirculation pipe 91 may be connected to the washing water discharge pipe 41. The recirculation pipe 91 is a pipe for recirculating the washing water discharged through the washing water discharge pipe 41 to the washing water supply pipe 50. When the washing water is not supplied to a separate use place or it is not necessary to discharge the washing water to the outside, So that the washing water can be circulated to the scrubber 40 and used. A recirculation tank (90) may be provided between the washing water discharge pipe (41) and the recirculation pipe (91).

The recycle tank 90 stores a part of the washing water discharged from the scrubber 40 and can serve as a kind of buffer tank so that a certain amount of washing water can be circulated through the recycling pipe 91. The recycle tank 90 may include at least one of a centrifugal separator, a gravity separator, and a filter, such as the filter unit 70, to circulate the washing water through the recirculation pipe 91 after removing the solid particles contained in the washing water have.

The washing water supply pipe 50 is connected to the sea water supply pipe 51, the fresh water supply pipe 52 and the recirculation pipe 91 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 injection unit 100 is connected to the seawater supply pipe 51 at the rear end of the control valve 51b and receives the ozone generated in the plasma purification unit 20 to further add the microorganisms contained in the washing water to the injection unit 100 Can be killed. The right hall 53 is branched to the seawater supply pipe 51 at the front end of the injection unit 100 and the right hall pipe 53 can be connected to the seawater supply pipe 51 at the rear end of the injection unit 100. [ Therefore, some of the seawater flowing through the seawater supply pipe 51 passes through the injection unit 100 and the ozone is injected. The remaining part of the seawater flows along the right hall pipe 53, passes through the injection unit 100, (54). &Lt; / RTI &gt;

A sensor unit 56 is provided at the rear end of the injection unit 100. The sensor unit 56 can grasp in real time the total residual oxidant, the pH concentration, the microbial concentration, and the like of the washing water flowing in the mixing pipe 54 and the seawater. The sensor unit 56 is electrically connected to the plasma purification unit 20 and the neutralizer supply unit 60 so that the plasma purification unit 20 and the neutralizer supply unit 60 can supply the oxidizer , The neutralizing agent, and the sterilizing agent can be appropriately controlled.

The washing water and the seawater flowing through the mixing pipe 54 may be discharged to the outside through the sea water discharge pipe 55 or may be supplied to a separate use place.

Hereinafter, with reference to FIG. 4, the operation of the moisture removal unit 30 will be described in more detail.

FIG. 4 is a view for explaining the process of removing moisture inside the plasma purification unit.

The exhaust gas is introduced into the respective reaction modules 20a through the gas supply pipe 10. At this time, as shown in FIG. 4 (a), the exhaust gas may include condensed water (H ₂ O) generated by condensing liquid water (H ₂ O) or gaseous steam . When moisture (H ₂ O) is present between the first electrode 21 and the second electrode 22, moisture (H ₂ O) is generated around the first electrode 21 and the second electrode 22 If stuck, electrical shorts may occur.

The water (H ₂ O) contained in the exhaust gas is guided to the guide bar 32 side along the surface of the connecting plate 23 as shown in FIGS. 4 (b) and 4 (c) (32). The connection plate 23 is formed of a water repellent material and the guide bar 32 is formed of a hydrophilic material so that water H ₂ O is guided to the guide bar 32 side without being absorbed by the connection plate 23, (Not shown). The water (H ₂ O) absorbed and agglomerated in the guide bar 32 moves along the guide bar 32 and can be discharged to the outside of the reaction module 20a.

The water (H ₂ O) inside the reaction module 20a is removed by the guide bar 32 to prevent electric short such as short-circuit or short-circuit due to moisture, thereby preventing malfunction and malfunction of the device. Therefore, the pollutants contained in the exhaust gas can be cleaned more quickly and smoothly.

The operation of the pollutant abatement apparatus 1 will be described in more detail below with reference to Figs. 5 and 6. Fig.

5 and 6 are operation diagrams for explaining the operation of the pollutant abatement apparatus.

FIG. 5 is a view showing an open loop type pollutant reduction process in which seawater introduced into a seawater supply pipe is discharged to the outside after passing through a scrubber, and FIG. 6 is a view illustrating a process in which seawater introduced into a seawater supply pipe passes through a scrubber And a method of reducing the amount of pollutants in the closed loop type recirculated through the recirculation pipe.

5, the seawater introduced through the seawater supply pipe 51 is supplied to the scrubber 40 through the wash water supply pipe 50. [ Since the washing water is sprayed on the upper portion of the scrubber 40, the washing water can be filled at a certain level below the scrubber 40.

At this time, the exhaust gas discharged from the combustion engine flows through the gas supply pipe 10 and can be injected from the lower portion of the scrubber 40. The plasma purification unit 20 can generate plasma to oxidize nitrogen oxides before the exhaust gas is supplied to the scrubber 40. The water removal unit 30 removes water contained in the exhaust gas and supplies it to the plasma purification unit 20 can maximize the production of oxidative radicals and ozone.

The exhaust gas is injected from the lower portion of the scrubber 40 to remove contaminants such as nitrogen oxides, sulfur oxides and dusts from the scrubber 40 by the cleansing water filled in the lower portion of the scrubber 40, The pollutant can be removed by the washing water sprayed from above. Through this process, the pollutants contained in the exhaust gas are removed, and the exhaust gas from which the pollutants are removed is discharged to the outside through the discharge pipe 42.

The scrubbing water in the scrubber 40 contains contaminants such as nitrogen oxides, sulfur oxides, and dust, and moves to the filter unit 70 through the scrubbing water discharge pipe 41. The filter unit 70 separates the solid particles and the like in the washing water and stores them in the sludge tank 80. The washing water from which solid particles are removed is discharged to the outside through the mixing pipe 54 and the sea water discharge pipe 55 do. At this time, when the pH value of the washing water flowing in the mixing pipe 54 is out of the reference value, the neutralizing agent supply unit 60 injects the neutralizing agent into the mixing pipe 54 to adjust the pH value to within the reference value, have.

6, the seawater introduced through the seawater supply pipe 51 is supplied to the scrubber 40 through the scrubbing water supply pipe 50, passes through the scrubber 40, is discharged to the scrubbing water discharge pipe 41 do. The washing water discharged to the washing water discharge pipe 41 is temporarily stored in the recirculation tank 90 and circulated to the washing water supply pipe 50 through the recirculation pipe 91. That is, the process of FIG. 6 is substantially the same as the process of FIG. 5 except that the washing water discharged to the washing water discharge pipe 41 is recycled through the recirculation pipe 91.

The seawater introduced through the seawater supply pipe 51 sequentially circulates through the wash water supply pipe 50, the scrubber 40, the wash water discharge pipe 41, the recycle tank 90 and the recirculation pipe 91, The process of FIG. 6 and the process of FIG. 5 may be performed in consideration of the contamination degree, the pH value, and the like. 6 may be used when the seawater can not be discharged to the outside as in the case where the discharge of seawater is limited. When the contamination due to the reuse of the washing water is severe, the solid- After removing it, it can be discharged to the outside and new sea water can be supplied.

Hereinafter, with reference to Fig. 7, the moisture removal unit 30 according to another embodiment of the present invention will be described in detail.

7 is a view showing a state in which a moisture removal unit according to another embodiment of the present invention is formed inside a plasma purification unit.

In the water removal unit 30 according to another embodiment of the present invention, the auxiliary guide bar 33 is disposed between the pair of guide bars 32. [ The water removal unit 30 according to another embodiment of the present invention is substantially the same as the above embodiment except that the auxiliary guide bar 33 is disposed between the pair of guide bars 32. [ Therefore, the description will be focused on, but unless otherwise noted, the description of the remaining components is replaced by the foregoing.

The guide bars 32 are formed in pairs and can be disposed on both sides along the flow direction of the exhaust gas, respectively. In other words, the first groove 31a is formed at both side edge portions of the first electrode 21 contacting with the connection plate 23, and the second groove 31b is formed at the both side portions of the pair of the first electrode 21 And the pair of guide bars 32 can be disposed on both sides in the flow direction of the exhaust gas. An auxiliary guide bar (33) is interposed between the pair of guide bars (32).

The auxiliary guide bar 33 guides the moisture inside the reaction module 20a to the guide bar 32 so that at least one guide bar 32 can be disposed between the pair of guide bars 32. [ The auxiliary guide bar 33 is formed of a metal material and can be coated with a hydrophilic solution, porous silica or Teflon (PVDF) or the like. The auxiliary guide bar 33 can absorb water inside the reaction module 20a and guide the guide bar 32 have. When the auxiliary guide bar 33 is made of porous silica, it can be manufactured by performing heat treatment at about 170 ° C for about 30 minutes. When the auxiliary guide bar 33 is formed of Teflon, . &Lt; / RTI &gt; By interposing the auxiliary guide bar 33 between the pair of guide bars 32, moisture inside the reaction module 20a can be removed more quickly. As described above, since the auxiliary guide bar 33 is formed of a metallic material, even if the auxiliary guide bar 33 is interposed between the first electrode 21 and the second electrode 22, the corona discharge by the pulse high voltage is smoothly Can proceed.

The auxiliary guide bar 33 may be inserted into the fixing groove 31c formed inside the first electrode 21. The auxiliary guide bar 33 is inserted into the fixing groove 31c so that there is no step between the first electrode 21 and the guide bar 32 and the auxiliary guide bar 33. As a result, It is possible to prevent the water absorbed in the guide bar 33 from stagnating without moving to the guide bar 32. Also, the corona discharge between the first electrode 21 and the second electrode 22 can proceed more smoothly. Although the auxiliary guide bar 33 and the fixing groove 31c are formed in a V shape on the drawing, the shape of the auxiliary guide bar 33 and the fixing groove 31c may be variously modified have.

Hereinafter, the pollutant abatement apparatus 1a according to another embodiment of the present invention will be described in detail with reference to Fig.

8 is a block diagram schematically showing a configuration of a pollutant abatement apparatus according to another embodiment of the present invention.

The pollutant abatement apparatus 1a according to another embodiment of the present invention is a system in which the ballast water tank 110 is connected to one side of the mixing pipe 54 and the washing water in which the microorganisms have been killed in the scrubber 40 is discharged into the ballast water Can be used. The pollutant abatement apparatus 1a according to another embodiment of the present invention is a system in which the ballast water tank 110 is connected to one side of the mixing pipe 54 and the washing water in which the microorganisms have been killed in the scrubber 40 is discharged into the ballast water Is substantially the same as the above-described embodiment, except that it is used. Therefore, the description will be focused on, but unless otherwise noted, the description of the remaining components is replaced by the foregoing.

A ballast tank (110) is connected to one side of the mixing pipe (54) at the front end of the sensor unit (55). The ballast tank 110 stores the cleansing water discharged through the cleansing water discharge pipe 41 or the seawater flowing through the seawater supply pipe 51 to maintain the equilibrium of the ship and the ship is provided with at least one ballast tank 110, Can be installed. As described above, since the washing water discharged through the washing water discharge pipe 41 absorbs nitrogen oxide, sulfur oxide, dust, etc. contained in the exhaust gas, the hydrogen ion concentration index, that is, the pH concentration value, Is lower than the pH value of the washing water flowing through the water supply pipe (50). In other words, the washing water flowing through the washing water discharge pipe 41 is acidified by the sulfur oxide, and the pH value is lower than the washing water flowing inside the washing water supply pipe 50. Therefore, the survival rate of the microorganisms contained in the washing water flowing in the washing water discharge pipe 41 is lower than the survival rate of the microorganisms contained in the washing water flowing in the washing water supply pipe 50.

That is, the washing water flowing in the washing water discharge pipe 41 satisfies the ballast water regulating condition that microorganisms having a certain size or more should be killed due to the low survival rate of the microorganisms due to acidification, so that the washing water is suitable for use as a ballast water. A separate ballast water treatment system for destroying microorganisms can be omitted by using cleansing water discharged from the scrubber 40 as the ballast water, thereby reducing the installation and maintenance cost of the system But the space utilization in the ship can also increase. In addition, since the conventional wet scrubber system can be implemented by adding piping, it can be easily applied to existing ships.

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: Contaminant abatement device
10: gas supply pipe 20: plasma purification unit
20a: reaction module 21: first electrode
22: second electrode 23: connection plate
30: water removal unit 31a: first groove
31b: second groove 31c: fixing groove
32: guide bar 33: auxiliary guide bar
40: scrubber 41: washing water discharge pipe
42: discharge pipe 50: cleaning water supply pipe
51: Seawater supply line 52: Fresh water supply line
53: right hall 54: mixing tube
55: Sea water discharge pipe 56:
60: neutralizing agent supply unit 70: filter unit
80: sludge tank 90: recirculation tank
91: recirculation tube 100: injection unit
110: ballast tank

Claims (9)

A plasma purification unit that receives exhaust gas from a combustion engine through a gas supply pipe, generates a pulse corona discharge to oxidize the exhaust gas and generates ozone; And
And a water removal unit connected to the plasma purification unit to remove moisture inside the plasma purification unit,
The water-
And a guide bar extending in the flow direction of the exhaust gas in the plasma purification unit to absorb and move moisture inside the plasma purification unit. The plasma processing apparatus according to claim 1,
A pair of first electrodes arranged in parallel to each other in a plate shape,
A pair of connection plates arranged parallel to each other and connecting the pair of first electrodes,
And at least one reaction module including a plurality of second electrodes arranged in a wire shape connecting between the connection plates in the flow direction of the exhaust gas. [3] The apparatus according to claim 2,
And connected to a groove extending in a flow direction of the exhaust gas, the connection electrode being formed at a corner where the first electrode and the connection plate meet. The pollutant abatement apparatus according to claim 3, wherein the guide bar is formed of a hydrophilic material. 4. The exhaust gas purifying apparatus according to claim 3, wherein the guide bars are disposed on both sides along the flow direction of the exhaust gas,
And at least one auxiliary guide bar interposed between the pair of guide bars for guiding the moisture inside the reaction module to the guide bar. 6. The pollutant abatement device according to claim 5, wherein the auxiliary guide bar is formed of a hydrophilic material and inserted into a fixing groove formed inside the first electrode. The pollutant abatement apparatus according to claim 1, wherein the moisture removal unit further comprises a dehumidifying unit connected to the gas supply pipe to absorb or evaporate moisture contained in the exhaust gas supplied to the plasma purification unit. 2. The pollutant abatement apparatus according to claim 1, wherein the moisture removal unit further comprises a thermal insulation unit surrounding the outer side of at least one of the gas supply pipe or the plasma purification unit and maintaining the temperature. The exhaust gas purifying apparatus according to claim 1, further comprising a scrubber for receiving the exhaust gas oxidized in the plasma purification unit and spraying cleaning water supplied through a cleaning water supply pipe to bring the exhaust gas and the cleaning water into gas-liquid contact Device.

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