KR20170031559A

KR20170031559A - Apparatus for reducing water and air pollutant

Info

Publication number: KR20170031559A
Application number: KR1020150129290A
Authority: KR
Inventors: 이승재; 박희준
Original assignee: 삼성중공업 주식회사
Priority date: 2015-09-11
Filing date: 2015-09-11
Publication date: 2017-03-21

Abstract

The present invention provides an apparatus for reducing pollutants of exhaust gas and drained water which comprises: an exhaust gas pipe which supplies exhaust gas of a combustion engine; a cleaning water supply pipe which is branched from a seawater supply pipe for receiving seawater from the outside and supplying ballast water to a ballast tank and supplies cleaning water; a scrubber which sprays cleaning water, supplied through the cleaning water supply pipe, to exhaust gas inserted through the exhaust gas pipe; a purification unit which is connected to the exhaust gas pipe or the scrubber, and oxidizes nitrogen-based oxide or neutralizes acidified cleaning water, or destroys bacteria included in the cleaning water; a cleaning water discharge pipe which discharges the cleaning water in the scrubber; a control valve which controls an amount of seawater inserted in the scrubber through the cleaning water supply pipe; and a control unit which controls the control valve in accordance with the concentration, degree of contamination of the exhaust gas or pH value of the cleaning water having passed through the scrubber.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus for reducing exhaust and drainage pollutants,

The present invention relates to an exhaust and drain pollutant abatement device, and more particularly, to an exhaust and drain pollutant abatement device capable of eliminating pollutants contained in exhaust gas of a combustion engine and microorganisms contained in seawater and discharging the same. will be.

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.

In addition, the ship stores the ballast water in a ballast tank provided in the hull to maintain balance and draft. Since ballast water is discharged at the sea of the destination after being filled at the sea of the starting point, discharging without separate water treatment can cause water pollution and marine ecosystem change.

For these reasons, environmental regulations for air pollution and water pollution of vessels have been strengthened, and various processing devices have been 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. A wet scrubber removes sulfur oxides by gas-liquid contact with seawater, fresh water or alkaline solution and exhaust gas. In addition, among the environmental regulations on water pollution, regulation to kill microorganisms of a certain size or more contained in the equilibrium water of a ship has become effective, and electrolysis, ozone, ultraviolet rays, and the like have been used for sterilization of microorganisms.

However, in the conventional system, the system for purifying exhaust gas and the system for treating ballast water each operate inefficiently, resulting in an increase in the installation and maintenance cost of the system, and a wider installation space There is a problem that the space utilization in the ship is lowered.

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

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in view of the above problems, and an object thereof is to provide an exhaust and drain pollutant abatement apparatus capable of exhausting and discharging pollutants contained in exhaust gas of a combustion engine and microorganisms contained in seawater. It is another object of the present invention to provide an exhaust and drainage pollutant abatement device capable of properly maintaining and adjusting the pH value of treated water that has passed through a scrubber in response to a situation.

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.

An exhaust and drainage pollutant abatement apparatus according to the present invention comprises: an exhaust gas pipe for supplying exhaust gas of a combustion engine; A cleaning water supply pipe branched from the sea water supply pipe for supplying the ballast water to the ballast tank from the outside, 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 scrubber for oxidizing the nitrogen-calculating cargo, neutralizing the acidified cleaning water or destroying the microorganisms contained in the cleaning water; A scrubbing water discharge pipe for discharging the scrubbing water inside the scrubber; A control valve for controlling the amount of seawater flowing into the scrubber through the cleansing water supply pipe; And a control unit for controlling the control valve according to the concentration of the exhaust gas, the degree of contamination, or the pH value of the washing water that has passed through the scrubber.

The concentration or the degree of contamination of the exhaust gas can be determined as the amount of at least one of sulfur oxides and nitrogen oxides in the exhaust gas.

The purifying unit may adjust the amount of the oxidizing agent injected into the exhaust gas pipe depending on the amount of at least one of sulfur oxides and nitrogen oxides in the exhaust gas.

And an oxide sensor unit connected to the exhaust gas pipe for measuring a concentration or amount of at least one of sulfur oxides and nitrogen oxides in the exhaust gas.

The control valve may include a flow rate controller connected to the wash water supply pipe.

The control valve may include a three-way valve that connects the seawater supply pipe and the wash water supply pipe and regulates the amount or ratio of seawater branched to the wash water supply pipe.

A mixed pipe in which mixed water of the seawater and the washing water moves between a seawater discharge pipe through which the seawater is discharged to the outside and the control valve and a mixing pipe installed in at least one of the washing water discharge pipe and the mixing pipe, And a pH sensor unit for measuring a pH value of the sample.

The purifying unit may inject a neutralizing agent or a sterilizing agent into the seawater supply pipe or the ballast tank according to the measured value of the pH sensor unit.

The washing water discharge pipe is connected to the seawater supply pipe so that the washing water passing through the scrubber can be supplied to the ballast tank through the seawater supply pipe or mixed with seawater supplied through the seawater supply pipe and then discharged outside.

The control unit may control the supply amount of the fresh water according to the concentration of the exhaust gas, the degree of contamination, or the pH value of the washing water that has passed through the scrubber. have.

According to the present invention, seawater passing through the wet scrubber system and microbes killed can be supplied to the ballast water tank and used as ballast water. Therefore, a separate ballast water treatment system for sterilizing the microorganisms contained in the ballast water is omitted. That is, the filtration apparatus, the sterilizing apparatus, and the like included in the conventional ballast water treatment system can be omitted, and the installation and maintenance cost of the system can be reduced, and the space utilization in the vessel can be increased. In addition, since the conventional wet scrubber system can be implemented by adding only piping, it can be easily applied to existing vessels.

Further, according to the present invention, it is possible to appropriately maintain and adjust the pH value of the treated water discharged from the scrubber system in accordance with the situation. That is, it is possible to actively and efficiently adjust the pH value of the treated water that has passed through the scrubber system to maintain an appropriate level in consideration of the concentration or amount of the pollutant contained in the exhaust gas and the treatment capacity of the scrubber system.

In addition, by oxidizing nitrogen monoxide through the purifying unit, neutralizing the acidified washing water at the same time, and sterilizing microorganisms in the seawater, it is advantageous in cost and space utilization.

1 and 2 are views schematically showing an exhaust and drain pollutant reduction apparatus according to an embodiment of the present invention.
3 to 8 are operation diagrams of an exhaust and drain 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.

In this specification, 'ballast water' is the same as 'ballast water' used for ballasting of the hull. Also, 'ballast tank' is a tank that can store such ballast water or equilibrium water and has the same meaning as 'ballast tank'.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an exhaust and drain pollutant abatement apparatus according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 8. FIG.

1 and 2 are views schematically showing an exhaust and drain pollutant reduction apparatus according to an embodiment of the present invention.

The exhaust and drain pollutant abatement device 1 according to an embodiment of the present invention can reduce the concentration of various pollutants (nitrogen oxides, sulfur oxides, dusts, etc.) contained in the exhaust gas, It is a device that can be used as equilibrium water or can be discharged into sea water by simultaneously sterilizing microorganisms contained in seawater. The exhaust and drainage pollutant abatement device (1) is mainly mounted on a ship and can simultaneously remove microorganisms contained in seawater used as ballast water while removing pollutants of exhaust gas generated from the ship. In addition, the exhaust and drain pollutant abatement device 1 can operate the pollutant removal function of the exhaust gas and the microorganism decay function of the ballast water respectively, or adjust the operation ratio as required, and is included in the conventional exhaust gas treatment system There is an advantage that the filtration device or the pump can be removed. Such a device can be implemented by adding only piping in a conventional wet scrubber system, and thus can be easily applied to existing ships.

Further, the exhaust and drain pollutant abatement device 1 according to an embodiment of the present invention can reduce the pollutant disposal state, for example, when the amount of pollutants contained in the exhaust gas increases or decreases relatively The pH value of the treated water discharged from the scrubber system can be appropriately maintained and adjusted even if it fluctuates. That is, the pH value of the treated water passing through the scrubber can be controlled to maintain an appropriate level in consideration of the concentration of the exhaust gas, the level of contamination, the ability of the scrubber to treat the pollutants, Water can be reused as ballast water for ballasting or discharged to the outside of the ship.

The exhaust and drain pollutant abatement device 1 according to the present invention includes an exhaust gas pipe 10, a cleaning water supply pipe 20, a scrubber 40, a purification unit 50, a cleaning water discharge pipe 41, A control valve 31 for controlling the amount of seawater flowing into the scrubber, and a control valve 31 for controlling the concentration of the exhaust gas, the degree of contamination or the pH value of the cleansing water (that is, the above- (Not shown).

The exhaust gas pipe (10) is connected to the scrubber (40) as a pipe through which the exhaust gas moves from the combustion engine. 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 a device 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.

On the other hand, the washing water supply pipe 20 is a tube for supplying washing water, which is at least one of seawater or fresh water, or mixed water of seawater and fresh water, to the scrubber 40. The seawater supply pipe 30 for supplying ballast water to the ballast tank Branched. One end of the washing water supply pipe 20 is connected to the scrubber 40 and a fresh water supply pipe 21 for supplying fresh water to one side of the washing water supply pipe 20 may be connected. Accordingly, the washing water supply pipe 20 can selectively receive seawater and fresh water.

The seawater supply pipe 30 is provided with a pump 36 to smoothly supply the washing water to the scrubber 40. The sea water supply pipe (30) serves to supply ballast water (ballast water) to the ballast tank (ballast water tank) by receiving seawater from the outside. Particularly, the washing water supply pipe 20 is branched from the sea water supply pipe 30 and connected to the scrubber 40, and a control valve 31 is installed at a connection portion between the washing water supply pipe 20 and the sea water supply pipe 30 have. The control valve 31 controls the amount of seawater supplied through the cleansing water supply pipe 20 or supplies the seawater to the ballast tank 60 through the seawater supply pipe 30 branched by the cleansing water supply pipe 20 The ratio of seawater can be adjusted.

The control valve 31 regulates the amount of seawater flowing into the scrubber 40 through the scrubbing water supply pipe 20. The control valve 31 connects the seawater supply pipe 30 and the wash water supply pipe 20 as shown in Fig. 1 and controls the amount or the ratio of the seawater branched to the wash water supply pipe 20 And may include a valve. However, the present invention is not limited thereto, and the control valve 31 may be formed by connecting a flow rate control device such as a flow rate controller to the cleaning water supply pipe 20 instead of the three-way valve as shown in FIG.

That is, although the control valve 31 is represented by a valve, it may be implemented in various forms including various types of devices that can control the flow amount, flow, flow rate, etc. of the fluid flowing in the pipeline without being limited thereto . The control valve 31 may be formed to receive and operate an electric signal of the control unit 100 and may be formed to vary the degree of opening or closing or opening and closing of the channel according to the control sequence of the control unit 100.

The control valve 31 may be formed in various forms capable of adjusting the amount of seawater flowing into the scrubber 40 through the cleansing water supply pipe 20, . For example, in the case of a flow rate controller or the like, a control valve 31 may be formed on the clean water supply pipe 20 side as shown in FIG. 2, The control valve 31 may be formed between the sea water supply pipe 30 and the cleaning water supply pipe 20 as shown in FIG. In any case, the control valve 31 can be formed at a position where the amount of the fluid flowing into the scrubber 40 through the cleaning water supply pipe 20 can be easily adjusted. The control unit 100 controls the concentration of the exhaust gas supplied to the exhaust gas pipe 10 or the degree of contamination or the degree of contamination of the exhaust gas passing through the scrubber 40 And controls the control valve 31 according to the pH value of the washing water. The control unit 100 may include a computing device capable of performing signal input / output, data operation, etc., and may receive control data from various sensors connected to the channel, and may control the control valve 31 by calculating the sensing data. If necessary, it is also possible to input a special control sequence to the control unit 100 and to form a control sequence corresponding to the sensed data.

The concentration or the degree of contamination of the exhaust gas can be determined from the amount of at least one of sulfur oxides (SOx) and nitrogen oxides (NOx) contained in the exhaust gas. That is, the concentration or the degree of contamination of the exhaust gas is measured by measuring the amount and concentration of sulfur oxides in the exhaust gas, the amount and concentration of nitrogen oxides, the amount or concentration of sulfur oxides and nitrogen oxides, And the amount of seawater supplied to the scrubber 40 can be adjusted corresponding to the concentration or the degree of contamination of the exhaust gas. To this end, the exhaust gas pipe 10 may be provided with an oxide sensor unit 12 for measuring the concentration or amount of at least one of sulfur oxides and nitrogen oxides in the exhaust gas. However, the present invention is not limited thereto, and the oxide sensor unit 12 may be installed in the discharge pipe 43 as well. A mixed pipe 34 in which mixed water of seawater and washing water is moved is formed between the seawater discharge pipe 37 and the control valve 31 through which the seawater is discharged to the outside, At least one of the water discharge pipe (41) and the mixing pipe (34) can form a pH sensor part (42) for measuring the pH value of the washing water or the mixed water. The cleaning water discharge pipe 41 and the mixing pipe 34 will be described later in more detail.

That is, the control unit 100 can measure the concentration or pollution level of the exhaust gas from the sensing signal of the oxide sensor unit 12 and calculate the pH of the washing water passing through the scrubber 40 from the sensing signal of the pH sensor unit 42 The value can be measured. In this way, the control unit 100 processes the contamination degree of the polluted exhaust gas and pollutants through the measured values of each sensor unit and grasps the pH value of the treated water discharged from the scrubber 40 (that is, the washing water passed through the scrubber) So that the amount of washing water introduced into the scrubber 40 can be appropriately adjusted so that the pH value of the washing water passed through the scrubber 40 is maintained at an appropriate level. It is also possible to adjust the pH value of the washing water by injecting the neutralizing agent into the washing water by using the purifying device 50 or a neutralizing agent storage tank (not shown).

The control unit 100 may also control the supply amount of fresh water supplied to the fresh water supply pipe 21 according to the exhaust gas concentration, the degree of contamination, or the pH value of the washing water that has passed through the scrubber 40. [ For example, a valve 21a formed on the fresh water supply pipe 21 side is opened and closed by a control signal of the control unit 100 to open and close the valve 21a with the control signal of the control unit 100, Can be changed. In this manner, the ratio of the seawater or fresh water supplied to the scrubber 40 is adjusted in accordance with the concentration of the exhaust gas or the degree of contamination, etc., and the clean water (sea water or fresh water, The pH value of at least one of water and a mixed water of water and the like) can be appropriately maintained. This will be described later in detail.

The scrubber 40 is a device for gas-liquid contacting the exhaust gas and the washing water by spraying the washing water supplied through the washing water supply pipe 20 to the exhaust gas flowing through the exhaust gas pipe 10, have. At this time, the cleaning water supply pipe 20 is disposed at the upper portion of the scrubber 40 at the end portion located inside the scrubber 40, and is branched into a plurality of portions, so that the cleaning water can be sprayed in the form of fine particles. That is, the cleaning water supply pipe 20 disposed at the upper portion of the scrubber 40 can spray the cleaning water toward the lower portion of the scrubber 40 into which the exhaust gas flows, so that the exhaust gas and the cleaning water can effectively contact each other. As the exhaust gas and cleaning 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 exhaust gas from which contaminants such as nitrogen oxides, sulfur oxides, The gas can be discharged to the outside through a separate discharge pipe (43). The exhaust gas G2 discharged through the discharge pipe 43 is suited to exhaust standards and can be discharged to the atmosphere because contaminants such as nitrogen oxides, sulfur oxides and dusts are removed.

At this time, as described above, the oxide sensor portion 12 for measuring the concentration or amount of at least one of sulfur oxides and nitrogen oxides in the exhaust gas may be provided in the discharge pipe 43 as well. Therefore, by comparing the concentrations of sulfur oxides and nitrogen oxides respectively measured in the exhaust gas pipe 10 and the discharge pipe 43, it is possible to more accurately calculate and compare the noxious gas removal rate or the throughput rate.

The scrubbing water containing nitrogen oxides, sulfur oxides, dust, etc. in contact with the exhaust gas containing contaminants in the scrubber 40 is discharged through the scrubbing water discharge pipe 41. Such rinse water may be acidic.

The purifying unit 50 is connected to the exhaust gas pipe 10 or the scrubber 40 to oxidize the nitrogen-calculating cargo in a physical or chemical manner, to neutralize the acidified cleaning water or to kill the microorganisms contained in the cleaning water have. The purifying unit 50 can supply the oxidizing agent to the exhaust gas pipe 10 or the scrubber 40, supply the neutralizing agent, or supply the sterilizing agent. For example, the purifying unit 50 may be an apparatus for producing both an oxidizing agent, a neutralizing agent, and a sterilizing agent by electrolyzing seawater, or an apparatus for producing an oxidizing agent and a sterilizing agent by using plasma. The purifying unit 50 is not limited to an electrolytic device or a plasma device but may be any device capable of oxidizing nitrogen-containing cargo, neutralizing acidified cleaning water, or destroying microorganisms contained in the cleaning water Do.

The purifying unit 50 can oxidize the nitrogen monoxide contained in the exhaust gas into nitrogen dioxide by injecting an oxidizing agent into the exhaust gas pipe 10. [ The nitrogen dioxide is easily dissolved in water as compared with the nitrogen monoxide, and can be easily removed by dissolving in the washing water in the scrubber 40. The purifying unit 50 can inject the liquid oxidizing agent into the exhaust gas pipe 10 in the form of fine particles. The purifying unit 50 can spray the liquid oxidizing agent directly into the exhaust gas pipe 10 by atomizing the liquid oxidizing agent or spray the liquid oxidizing agent through the separate spray unit 11 provided in the exhaust gas pipe 10. The purifying unit 50 receives the sensing signal from the oxide sensor unit 12 or the like and can adjust the amount of the oxidizing agent to be injected into the exhaust gas pipe 10 in accordance with the amount of at least one of sulfur oxides and nitrogen oxides in the exhaust gas have. For example, the control unit 100 may be connected to the purification unit 50 and the control unit 100 may control the purification unit 50 in this manner. At this time, the purifying unit 50 can spray the neutralizing agent to the scrubber 40. The neutralizing agent can neutralize the cleansing water acidified by the reaction of the nitrogen oxides and the sulfur oxides with the washing water. When the nitrogen oxides and sulfur oxides react with seawater, nitric acid (HNO 3) and sulfuric acid (H 2 SO 4) are produced respectively. Thus, the purification unit 50 injects sodium hypochlorite (NaOCl) or the like into the scrubber 40, Can be neutralized.

The purifying unit 50 can neutralize the ballast water by spraying a neutralizing agent into the ballast water tank 60 or spraying a neutralizing agent to the sea water discharge pipe 37. It is also possible to inject a neutralizing agent or a sterilizing agent into the seawater supply pipe 30 or the ballast tank (ballast tank) 60 according to the measurement value of the pH sensor unit 42 described above, The amount of the neutralizing agent or the sterilizing agent can be appropriately changed. For example, the purifying unit 50 can be easily controlled in this case by connecting the control unit 100 to the purifying unit 50 as well. On the other hand, the purifying unit 50 can directly supply the neutralizing agent (NaOH) to the scrubber 40, and when the purifying unit 50 does not sufficiently neutralize the washing water, a separate neutralizing agent injecting unit In addition, a secondary neutralization step may be carried out.

The washing water discharge pipe 41 may be connected to the sea water supply pipe 30 through the filter unit 70 as a pipe for discharging washing water inside the scrubber 40. That is, the washing water discharge pipe 41 can be stored in the ballast water tank 60 or can be discharged to the outside after separating the solid particles through the filter unit 70. The washing water discharge pipe 41 is not necessarily connected to the sea water supply pipe 30 but may be connected to the ballast tank 60 independently or to the outside of the ship.

A circulation pipe 91 may be connected to the washing water discharge pipe 41. The circulation pipe 91 is for recirculating the washing water discharged through the washing water discharge pipe 41 to the washing water supply pipe 20. When the washing water is not used as ballast water or it is not necessary to discharge the washing water to the outside, May be circulated to the scrubber 40 and used continuously.

A recirculation tank (90) may be provided between the washing water discharge pipe (41) and the circulation pipe (91). The recycle tank 90 may store a part of the washing water discharged through the scrubber 40 and may serve as a kind of buffer tank so that a certain amount of washing water can be circulated through the circulation pipe 91.

The recycle tank 90 may include any one of a centrifuge, a gravity separator, and a filter such as the filter unit 70 to remove the solid particles included in the washing water and recycle the washing water through the circulation tube 91 .

The cleaning water supply pipe 20 is connected to the seawater supply pipe 30, the fresh water supply pipe 21 and the circulation pipe 91 so that the concentration of the exhaust gas, the treatment capacity of the scrubber 40, The seawater, fresh water, and the circulating water can be suitably mixed and supplied to the scrubber 40.

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- The particles can be separated and discharged to the sludge tank 80. The filter unit 70 may be connected to the seawater supply pipe 30 between the pump 36 and the control valve 31. That is, the seawater supplied from the seawater supply pipe 30 is supplied to the scrubber 40 through the filter unit 70, and the washing water having passed through the scrubber 40 can pass through the filter unit 70 again. That is, both the seawater introduced from the outside and the washing water passing through the scrubber 40 can be filtered by the single filter unit 70. Further, a merging pipe (see 38 in FIG. 7) which is directly connected to the sea water supply pipe 30 at the rear end of the control valve 31 may be provided on one side of the filter unit 70.

The neutralizing agent or the sterilizing agent supplied from the purifying unit 50 can be sprayed to the washing water or seawater having passed through the filter unit 70 as described above. It is also possible to use one or two filter units 70 in order to remove the large particles contained in the washing water that has passed through the washing water discharge pipe 41 or the seawater having passed through the sea water supply pipe 30 Or may be used independently. A mixing pipe 34 for discharging mixed water of seawater and washing water may be provided between the filter unit 70 and the seawater discharge pipe 37. A neutralizing agent or a sterilizing agent supplied from the purifying unit 50 to the mixing pipe 34, And an injection unit 33 for injecting the water. The injection unit 33 can inject the neutralizing agent or the sterilizing agent into the seawater and the washing water in a liquid or gaseous state.

The sensor unit 32 is provided at the rear end of the injection unit 33 so that the total residual oxidant, pH concentration and microbial concentration in the washing water and seawater discharged through the mixing pipe 34 can be measured in real time . The purifying unit 50 appropriately adjusts the amount of the oxidizing agent, the neutralizing agent, and the sterilizing agent according to the result of the sensor unit 32. The cleansing water and the seawater discharged through the mixing pipe 34 flow into the ballast water tank 60 or are discharged to the outside. The sensor unit 32 may be a pH sensor unit installed in the mixing pipe 34 for measuring the pH value of the mixing pipe 34. That is, the pH value of the washing water that has passed through the scrubber 40 can be measured directly from the pH sensor unit 42 provided in the washing water discharge pipe 41 or the pH value of the sensor unit 32 provided in the mixing pipe 34 Can be measured indirectly. It is possible to utilize the measured values of the respective sensor units to complement each other or selectively take a value that is deemed appropriate, and to more accurately grasp a change in pH or pH value of the treated water that has passed through the scrubber 40. [

The ballast water tank 60 stores the washing water discharged through the washing water discharge pipe 41 to maintain the equilibrium of the ship. As described above, the washing water discharged through the washing water discharge pipe (41) absorbs nitrogen oxides, sulfur oxides and dusts contained in the exhaust gas. The pH value of the washing water flowing in the washing water discharge pipe 41 is lower than the pH value of the washing water flowing in the washing water supply pipe 20. In other words, the washing water flowing in the washing water discharge pipe 41 is acidified due to sulfur oxides, nitrogen oxides, and the like, and the PH value is lower than the washing water flowing in the washing water supply pipe 20. 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 inside the washing water feed pipe 20.

That is, the washing water flowing in the washing water discharge pipe 41 satisfies the ballast water regulatory 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 be increased. In addition, since the conventional wet scrubber system can be implemented by adding piping, it can be easily applied to existing ships.

On the other hand, the purifying unit 50 can supply the sterilizing agent directly to the ballast water tank 60. If the concentration of the microorganisms in the ballast water stored in the ballast water tank 60 is high, the microbial concentration can be controlled by injecting the microbicide directly into the ballast water tank 60. Therefore, the ballast water stored in the ballast water tank 60 can be adjusted to the microbial allowance before discharge to the outside, thereby preventing marine pollution and ecosystem disturbance.

Hereinafter, the operation of the exhaust and drain pollutant abatement device 1 will be described in more detail with reference to Figs. 3 to 8. Fig.

3 and 4 illustrate a process of supplying seawater introduced through the seawater supply pipe 30 to the ballast water. FIG. 3 shows a direct disinfection method in which a sterilizing material is input into the entire seawater supplied to the ballast water FIG. 4 shows an indirect sterilization method in which a sterilizing material is injected into a part of seawater supplied as ballast water and mixed with seawater supplied from the outside.

3, the seawater supplied through the seawater supply pipe 30 passes through the filter unit 70 to remove microbes with large particles. For example, the filter unit 70 can separate microorganisms having a diameter of 50 mu m or more, which do not easily die out with sterilizing materials.

The sterilizing agent supplied from the purification unit 50 can be sprayed to the seawater having passed through the filter unit 70. Seawater whose microbes have been killed by spraying the disinfectant may be supplied to the ballast water tank 60 and used as ballast water.

4, the seawater supplied through the seawater supply pipe 30 passes through the filter unit 70 to remove large microbes, and the seawater is partially discharged through the mixing pipe 34, Most of the seawater can be discharged through the waste pipe 35. The mixing pipe 34 is a pipe through which the sterilizing agent is injected from the purifying unit 50. The right pipe pipe 35 is a pipe through which the seawater having passed through the filter unit 70 flows directly into the ballast water tank 60.

When the seawater having passed through the mixing pipe 34 and the seawater passing through the right-side pipe 35 are mixed with each other, the seawater passing through the mixing pipe 34 passes through the right pipe 35 All the microorganisms contained in one sea of water can be killed.

The amount and the ratio of the seawater passing through the mixing pipe 34 and the waste pipe 35 can be selectively controlled according to the concentration of the microorganisms contained in the seawater, the microbial removal method, and the like.

As described with reference to Figs. 3 and 4, the exhaust and drain pollutant abatement device 1 can independently treat the equilibrium water even if the function of removing the exhaust gas is not used.

Hereinafter, a process in which the pollutant abatement apparatus 1 operates to remove only pollutants of the exhaust gas will be described with reference to FIGS. 5 and 6. FIG.

5 is a view illustrating a method in which seawater supplied to the seawater supply pipe 30 is discharged directly to the outside through the scrubber 40. Figure 6 shows that the seawater introduced into the seawater supply pipe 30 passes through the scrubber 40 And then recycled through the circulation pipe 91 to be reused.

5, the seawater introduced through the seawater supply pipe 30 is supplied to the scrubber 40 through the wash water supply pipe 20. The washing water is sprayed on the upper portion of the scrubber 40 and the washing water can be filled in the lower portion of the scrubber 40 at a certain water level.

At this time, the exhaust gas supplied through the exhaust gas pipe 10 may be injected from the lower portion of the scrubber 40. The purifier unit 50 can oxidize nitrogen monoxide to nitrogen dioxide by injecting an oxidant before the exhaust gas is supplied to the scrubber 40. The purifying unit 50 can inject the neutralizing agent together with 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, so that contaminants such as nitrogen oxides, sulfur oxides and dust are primarily removed from the washing water filled in the lower part of the scrubber 40, The pollutant can be removed again by the washing water sprayed from the upper part of the washing water tank. Through this process, the pollutants 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 43.

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 70 through the washing water discharge pipe 41. The filter unit 70 separates pollutants such as solid particles in the washing water and stores them in the sludge tank 80. The clean washing water is discharged to the outside through the mixing pipe 34 and the sea water discharge pipe 37. At this time, when the pH value of the washing water passing through the mixing pipe 34 is out of the reference value, the purification unit 50 injects the neutralizing agent into the mixing pipe 34 to adjust the pH value to within the reference value and discharge it to the outside.

Particularly, the concentration or amount of at least one of sulfur oxides and nitrogen oxides of the exhaust gas supplied from the oxide sensor unit 12 to the exhaust gas pipe 10 is measured and transmitted to the control unit 100, And determines the concentration or pollution level of the exhaust gas. Accordingly, the control unit 100 can appropriately adjust the amount of seawater flowing into the scrubber 40 through the cleansing water supply pipe 20 by controlling the control valve 31 accordingly. In addition, the controller 100 controls the valve 21a formed on the fresh water supply pipe 21 side to adjust the supply amount of fresh water supplied to the scrubber 40 as well.

That is, the controller 100 adjusts the amount of seawater or fresh water supplied to the scrubber 40 so that the scrubber 40 can smoothly treat the contaminants in response to the degree of contamination or concentration of the exhaust gas, And the supply amount of the washing water, which is at least one of fresh water or a mixed water of seawater and fresh water, can be appropriately adjusted. This control does not take into consideration only the pollution degree of the exhaust gas, the concentration or the inflow amount of the exhaust gas, but also the pH value of the washing water passing through the scrubber 40 together. That is, the pH value measured by the pH sensor unit 42 and the pH value measured by the sensor unit 32 are continuously monitored to determine whether the washing water passed through the scrubber 40 or the mixing water mixed with the washing water and the sea water the amount of the washing water supplied to the scrubber 40 can be very easily adjusted so that the pH value distribution, fluctuation condition, and the like can be grasped and the pH value does not deviate from the proper level.

For example, when a fuel having different concentrations of sulfur oxides or nitrogen oxides such as MGO (Marine Gas Oil) or HFO (Heavy Fuel Oil) is used for a generator or a boiler, the oxidation sensor unit 12 installed in the exhaust gas pipe 10 The amount of washing water supplied to the scrubber 40 to control the exhaust gas generated therefrom can be more accurately controlled based on the sulfur oxide and nitrogen oxide measurement values. In addition, when the concentrations of sulfur oxides and nitrogen oxides are relatively high, the amount of oxidizing agent supplied from the purification unit 50 to the exhaust gas pipe 10 can be increased, so that the cleaning water contamination material can be more easily dissolved and treated.

Since the cleaning water is acidified by treating the contaminants such as nitrogen oxides and sulfuric acid with nitric acid and sulfuric acid in the scrubber 40, the amount of the washing water introduced into the scrubber 40 is controlled through the control of the controller 100, The pH value of the washing water passing through the scrubber 40 can be adjusted by increasing or decreasing the supply amount of water. As shown in FIG. 5, the washing water that has passed through the scrubber 40 is mixed with the seawater and is discharged to the outside. Therefore, the washing water supplied to the scrubber 40 to maintain the pH value between 6.5 and 7 The supply amount can be adjusted by appropriately increasing or decreasing. If necessary, it is also possible to adjust the pH value by adjusting the feed amount of the neutralizing agent supplied.

6, the seawater introduced through the seawater supply pipe 30 is discharged to the washing water discharge pipe 41 through the scrubber 40, and the washing water discharged into the washing water discharge pipe 41 is recirculated Temporarily stored in the tank 90, and then circulated to the washing water supply pipe 20 through the circulation pipe 91 again. That is, the process of FIG. 6 is substantially the same as the process of FIG. 5 except that the washing water is recycled through the circulation pipe 91 and reused.

The seawater introduced through the seawater supply pipe 30 is circulated sequentially through the cleaning water supply pipe 20, the scrubber 40, the washing water discharge pipe 41 and the circulation pipe 91 and considers the contamination degree and pH value of seawater The process of FIG. 6 and the process of FIG. 5 may be performed in parallel. 6 can be used when seawater can not be discharged to the outside, such as when passing through an emission control area (ECA) where the discharge of seawater is limited, and by recirculating the wash water many times, If the contamination is severe, the solid-phase particles can be removed through the filter unit 70 and discharged to the outside, and new seawater can be supplied to the scrubber 40 again.

5 and 6 may be selectively or sequentially used as needed.

Hereinafter, a process in which the pollutant abatement apparatus 1 simultaneously performs contaminant removal of exhaust gas and equilibrium water treatment will be described with reference to FIGS. 7 and 8. FIG.

7, the seawater introduced through the seawater supply pipe 30 is supplied to the scrubber 40 through the scrubbing water supply pipe 20. The washing water is sprayed on the upper portion of the scrubber 40 and the washing water can be filled in the lower portion of the scrubber 40 at a certain water level.

On the other hand, the exhaust gas can be injected in the washing water filled in the lower part of the scrubber 40, so that contaminants such as nitrogen oxides, converted cargoes and dusts are primarily removed from the washing water filled in the lower part of the scrubber 40, The pollutant can be removed again by the washing water sprayed from the upper part of the washing water tank. Through this process, the pollutants 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 43.

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 70 through the washing water discharge pipe 41. The filter unit 70 separates contaminants such as solid particles in the washing water and stores them in the sludge tank 80. The clean washing water passes through the sea water supply pipe 30 and the mixing pipe 34, 60 or may be discharged to the outside through the sea water discharge pipe 37. At this time, the seawater introduced from the outside, which has not passed through the scrubber 40, is joined to the seawater supply pipe 30 through the merging pipe 38 provided on one side of the filter unit 70, To a clean wash water.

On the other hand, the mixed water of the washing water and the seawater flowing through the sea water supply pipe 30 can be injected with the sterilizing agent supplied from the purification unit 50 through the injection unit 33.

In this case, the control unit 100 also measures the concentration or the amount of at least one of the sulfur oxides and the nitrogen oxides of the exhaust gas supplied from the oxide sensor unit 12 to the exhaust gas pipe 10, and transmits the measured concentration or amount to the control unit 100, The control unit 100 determines the concentration or pollution level of the exhaust gas. Accordingly, by controlling the control valve 31, the amount of the seawater flowing into the scrubber 40 through the cleaning water supply pipe 20 can be appropriately adjusted, and the valve 21a formed on the clean water supply pipe 21 side The supply amount of fresh water supplied to the scrubber 40 can be controlled.

That is, even when the pollutant removal of the exhaust gas and the ballast water treatment are performed at the same time, the control unit 100 is used to control the scrubber 40 so that the scrubber 40 can smoothly treat contaminants, The supply amount of the washing water, which is at least one of seawater, fresh water, or mixed water of seawater and fresh water, can be appropriately adjusted. This control is performed by considering the pH value of the washing water that has passed through the scrubber 40 as described above and the pH value measured by the pH sensor unit 42 and the pH value measured by the sensor unit 32 The distribution of the pH value of the mixed water mixed with the cleansing water passing through the scrubber 40 or the mixed water containing the cleansing water and the seawater is monitored and supplied to the scrubber 40 so that the pH value does not deviate from the proper level The amount of washing water can be controlled very easily.

8, the seawater introduced through the seawater supply pipe 30 is supplied to the scrubber 40 through the scrubbing water supply pipe 20. A part of the washing water having passed through the scrubber 40 is recycled to the scrubber 40 via the recycle tank 90, the circulation pipe 91 and the washing water supply pipe 20, and the remaining part is returned to the filter unit 70 Can be moved. 8, except that a part of the washing water that has passed through the scrubber 40 is recycled to the scrubber 40 through the recycle tank 90, the circulation pipe 91, and the washing water supply pipe 20 , The remaining process is substantially the same as the process of FIG.

On the other hand, the seawater flowing in the sea water supply pipe 30 is injected with the sterilizing agent by the injection unit 33 and the remaining part flows along the right hall pipe 35, passes through the injection unit 33, Can be mixed with the flow of seawater.

In this manner, the exhaust and drain pollutant abatement device 1 can be used to treat the ballast water, treat the pollutant, or proceed simultaneously with the ballast water and pollutant treatment. By controlling the control valve 31 or the like with the control unit 100 in this process, the supply amount of the washing water supplied to the scrubber 40 is increased or decreased and the pH value of the washing water passed through the scrubber 40 is adjusted to a proper level Can be very easily maintained. 7 and 8 show a process of opening the seawater discharge pipe 37 in an open loop manner to discharge the washing water and the like to the ocean. However, the exhaust and drain pollutant abatement device 1, It is also possible to operate in a closed loop system in which seawater, washing water, mixed water, and the like are circulated inside the hull while one side of the discharge pipe 37 is closed.

In addition, depending on the operating position of the vessel, such as the ECA (Emission Control Area) area where the pollutant throughput is increased, relatively low ballasting is required around the harbor where the ballasting is frequently used, It is possible to carry out the equilibrium water treatment with the exhaust pollutant. In particular, the control unit 100 can control the control valve 31 and adjust the amount of seawater supplied to the scrubber 40 in response to this situation. It is also possible to distribute the amount of seawater used for equilibrium water treatment and the amount of seawater used for treating pollutants at an optimum ratio.

That is, for example, in the vicinity of a harbor where ballasting is frequently used, only the ballast water can be treated as described above, or a relatively large amount of seawater can be used for ballast water treatment. In the case of operating in the ECA area, It is possible to treat only the pollutants as described above, or disassemble them so as to use a large amount of seawater for treating the pollutants relatively. In this way, the exhaust and drain pollutants can be utilized very efficiently in the treatment apparatus 1. [

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 and drainage pollutant abatement device
10: Exhaust gas pipe 11: Spray unit
12: oxide sensor part 20: cleaning water supply pipe
21: fresh water supply pipe 21a: valve
30: sea water supply pipe 31: control valve
32: sensor unit 33: injection unit
34: mixing tube 35:
36: Pump 37: Sea water discharge pipe
38: Coupling pipe 40: Scrubber
41: cleansing water discharge pipe 42: pH sensor unit
43: exhaust pipe 50: purifying unit
60: ballast tank 70: filter unit
80: sludge tank 90: recirculation tank
91: circulation pipe 100:

Claims

An exhaust gas pipe for supplying exhaust gas of a combustion engine;
A cleaning water supply pipe branched from the sea water supply pipe for supplying the ballast water to the ballast tank from the outside,
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 scrubber for oxidizing the nitrogen-calculating cargo, neutralizing the acidified cleaning water or destroying the microorganisms contained in the cleaning water;
A scrubbing water discharge pipe for discharging the scrubbing water inside the scrubber;
A control valve for controlling the amount of seawater flowing into the scrubber through the cleansing water supply pipe;
And a controller for controlling the control valve according to the concentration of the exhaust gas, the degree of contamination, or the pH value of the washing water that has passed through the scrubber.

The exhaust and drainage pollutant abatement device according to claim 1, wherein the concentration or the degree of contamination of the exhaust gas is determined as at least one of sulfur oxides and nitrogen oxides in the exhaust gas.

The exhaust and drain pollutant abatement apparatus according to claim 2, wherein the purifying unit regulates the amount of oxidizing agent injected into the exhaust gas pipe according to the amount of at least one of sulfur oxides and nitrogen oxides in the exhaust gas.

3. The method of claim 2,
And an oxide sensor connected to the exhaust gas pipe for measuring a concentration or an amount of at least one of sulfur oxides and nitrogen oxides in the exhaust gas.

The exhaust and drain pollutant abatement apparatus according to claim 1, wherein the control valve includes a flow rate controller connected to the cleaning water supply pipe.

The exhaust and drain pollutant abatement device according to claim 1, wherein the control valve includes a three-way valve that connects the seawater supply pipe and the wash water supply pipe and regulates the amount or ratio of seawater branched to the wash water supply pipe.

The method according to claim 6,
A mixed tube in which mixed water of the seawater and the washing water moves between a seawater discharge pipe through which seawater is discharged to the outside and the control valve,
And a pH sensor unit installed in at least one of the washing water discharge pipe and the mixing pipe for measuring a pH value of the washing water or the mixed water.

The exhaust and drain pollutant abatement apparatus according to claim 7, wherein the purifying unit injects a neutralizing agent or a sterilizing agent into the seawater supply pipe or the ballast tank according to a measured value of the pH sensor unit.

The washing machine according to claim 1, wherein the washing water discharge pipe is connected to the seawater supply pipe, the washing water passing through the scrubber is supplied to the ballast tank through the seawater supply pipe, mixed with seawater supplied through the seawater supply pipe, Exhaust and drain pollutant abatement apparatus.

The washing machine according to claim 1, further comprising a fresh water supply pipe connected to the washing water supply pipe to supply fresh water,
Wherein the control unit controls the supply amount of the clear water according to the concentration of the exhaust gas, the degree of contamination, or the pH value of the washing water that has passed through the scrubber.