KR101497468B1 - Apparatus for Treating Exhaust Gas and Toxic Substance Reduction System of Treating Exhaust Gas - Google Patents

Abstract

A ship exhaust gas treating apparatus and a system for simultaneous abatement of exhaust gas harmful substances are disclosed. The exhaust gas treating apparatus for a ship according to an embodiment of the present invention includes a ceramic filter for removing dust, sulfur oxides and nitrogen oxides contained in exhaust gas, and an internal space for storing the elements, wherein the ceramic filter is installed, And a frame in which a communication hole through which the exhaust gas filtered by the filter is formed and the element stored in the internal space is supplied to the exhaust gas passed through the ceramic filter.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas treating apparatus for a marine vessel and a simultaneous abatement system for exhaust gas harmful substances,

The present invention relates to an exhaust gas treatment apparatus for marine vessel including a ceramic filter and a first filter assembly including a frame, and an exhaust gas treatment device for collectively removing sulfur oxide, dust and nitrogen oxide contained in the exhaust gas And a system for simultaneous reduction of harmful substances.

In recent years, environmental regulations for pollutants of ship engine exhaust gas (eg, exhaust gas) have been gradually strengthened, and various engine exhaust gas post-treatment technologies and devices have been developed and applied.

In the case of Tier III, which will take effect in 2016, it is necessary to reduce more than 80% of NOx compared to current tier II. In 2013, carbon dioxide, a greenhouse gas, is linked to EEDI (Energy Efficiency Design Index) It becomes a target.

In addition, regulations on sulfur oxides (SOx) are on the rise. Particulate matter (PM) is not currently regulated, but there is a possibility that it will be included in the regulation soon as regulations are being discussed .

SCR (Selective Catalytic Reduction) device is a typical aftertreatment device for reducing NOx, and is currently being evaluated as the only alternative of Tier III. Currently, development of low temperature catalyst technology for main engine application is under development.

Regulations on sulfur oxides are being tightened gradually. There are two main ways to reduce sulfur oxides emissions.

First, a semi-dry method using lime and a wet method using sodium hydroxide (NaOH) are widely used as a method of chemically post-treating sulfur oxides.

A second way is to use the fuel itself as a low sulfur fuel. Currently, the use of low sulfur fuel in the Emission Control Area (ECA) is widely used.

In the case of dust (PM), the DPF (Diesel Particulate Filter) technology already developed in automobiles is widely used.

The dust is filtered and accumulated in the DPF, and the dust is removed by burning after a certain amount is accumulated.

Although each post-treatment system for nitrogen oxides, sulfur oxides, and dusts exists as mentioned above, when each of these devices is separately applied to a ship, problems due to equipment cost and space, and pressure loss, It is economically, spatially, and pressure-intensive to mount the apparatus of the present invention on a ship.

Therefore, an integrated integrated aftertreatment device is required in order to minimize the pressure loss while being more economical and occupying less space.

That is, since the present environmental regulation is limited to the coastal area where the emission control area (ECA) is used, a method of using only in the ECA region having relatively short operating time is adopted without using a post-treatment device in the high seas.

In the long run, if environmental regulations are applied to the high seas, inevitably a monolithic integrated aftertreatment system will be needed.

Ultimately, integrated post-processing should be developed and applied to meet more stringent environmental regulations.

Japanese Patent Application Laid-Open No. 10-2007-0099884

SUMMARY OF THE INVENTION The present invention has been made to overcome the above-mentioned problems, and an object of the present invention is as follows.

First, the present invention provides a marine exhaust gas treatment device capable of removing dust, sulfur oxides, and nitrogen oxides contained in exhaust gas, and a simultaneous exhaust gas reduction system.

Second, the present invention provides a marine exhaust gas treatment device capable of supplying an element to the rear end of a ceramic filter and a simultaneous exhaust gas reducing system.

Third, the present invention is to provide a marine exhaust gas treating apparatus and a simultaneous exhaust gas reducing system that can increase the reduction efficiency of nitrogen oxides.

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

In order to accomplish the above object, an exhaust gas treating apparatus for marine according to an embodiment of the present invention may include a first filter assembly having a ceramic filter and a frame.

The ceramic filter can remove contaminants such as dust contained in the exhaust gas.

The frame may include an internal space in which the elements are stored, and a communication hole through which the exhaust gas filtered by the ceramic filter passes. The frame may be configured such that the element stored in the internal space is supplied to the exhaust gas that has passed through the ceramic filter.

The exhaust gas treatment apparatus for marine vessels according to the present embodiment may include a second filter assembly disposed at a rear end of the first filter assembly and having at least one filter for removing nitrogen oxide contained in the exhaust gas passing through the first filter assembly, . ≪ / RTI >

The filter of the second filter assembly may include a catalyst for reducing nitrogen oxides.

The inner wall of the communication hole may be provided with an element supply hole for supplying the element to the exhaust gas that has passed through the ceramic filter.

A main supply hole may be formed at one side of the frame to receive the element from the outside.

The frame may include a first frame positioned on a side to which the exhaust gas flows and a second frame positioned on a side from which the exhaust gas flows.

The ceramic filter may have a double layer structure of an outer layer and an inner layer having different pore sizes. The size of the pores of the outer layer may be smaller than the size of the pores of the inner layer.

The ceramic filter may include an engaging portion that engages with the communication hole.

Meanwhile, the system for simultaneous abatement of exhaust gas according to an embodiment of the present invention includes a lime tank in which lime is contained, an element tank in which elements are accommodated, and an exhaust passage between the inflow path and the exhaust path of the exhaust gas, And an exhaust gas treatment device including a marine exhaust gas treatment device constructed as described above.

According to another aspect of the present invention, there is provided a system for simultaneous abatement of exhaust gas pollutants, comprising: a lime oil furnace for flowing lime contained in the lime tank; and a lime feed nozzle for supplying the lime to the exhaust gas inflow path, And an urea supply unit including an urea channel for flowing the element accommodated in the urea tank and an urea supply nozzle provided in the urea channel and supplying the element to the exhaust gas treatment unit.

Here, the element supply nozzle can supply an element to the main supply hole.

The effects of the present invention will be described below.

First, according to an embodiment of the present invention, a system for treating a ship exhaust gas and an exhaust gas harmful material simultaneous reduction system can supply elements to a rear end of a ceramic filter in which exhaust gas is concentrated, thereby mixing nitrogen oxide and elements together.

Second, the ship exhaust gas treating system and the exhaust gas harmful material simultaneous abatement system according to an embodiment of the present invention are characterized in that an internal space capable of storing elements is formed inside a frame, and an element supply Holes are formed and a separate flow path for supplying the elements to the respective ceramic filters is not required, which is advantageous in that the structure is simple.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

The foregoing summary, as well as the detailed description of the preferred embodiments of the present application set forth below, may be better understood when read in conjunction with the appended drawings. For the purpose of illustrating the invention, there are shown preferred embodiments in the figures. It should be understood, however, that this application is not limited to the precise arrangements and instrumentalities shown.
1 is an exploded perspective view showing a first filter assembly of a marine exhaust gas treating apparatus according to an embodiment of the present invention;
2 is a perspective view showing a first filter assembly of a marine exhaust gas treating apparatus according to an embodiment of the present invention;
3 is a cross-sectional view showing a first filter assembly of a marine exhaust gas treating apparatus according to an embodiment of the present invention;
FIG. 4 illustrates a system for simultaneously reducing exhaust gas pollutants according to an embodiment of the present invention; FIG. And
5 is a view showing a simultaneous exhaust gas reduction system according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is to be understood, however, that the appended drawings illustrate the present invention in order to more easily explain the present invention, and the scope of the present invention is not limited thereto. You will know.

In describing the embodiments of the present invention, it is to be noted that elements having the same function are denoted by the same names and numerals, but are substantially not identical to elements of the prior art.

Also, the terms used in the present application are used only to describe certain embodiments and are not intended to limit the present invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

FIG. 1 is an exploded perspective view showing a first filter assembly of a marine exhaust gas treating apparatus according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a first filter assembly of a marine exhaust gas treating apparatus according to an embodiment of the present invention. It is a perspective view.

Hereinafter, a first filter assembly 100 of a marine exhaust gas treating apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG.

The first filter assembly 100 according to an embodiment of the present invention may include a ceramic filter 130 and a frame.

The ceramic filter 130 can remove contaminants such as dust contained in the exhaust gas.

The frame may be formed with an internal space 110a in which the element 2 is stored and a communication hole 122 through which the exhaust gas filtered by the ceramic filter 130 passes. The frame may be configured such that the element 2 stored in the internal space 110a is supplied to the exhaust gas that has passed through the ceramic filter 130. [

A plurality of ceramic filters 130 may be provided, and a plurality of communication holes 122 may be formed in the frame.

However, the number and shape of the ceramic filters 130 are not limited to those shown in the drawings, and only one ceramic filter 130 may be inserted into one frame.

The frame of the present embodiment may include a first frame 110 and a second frame 120.

The first frame 110 is located on the side where the exhaust gas flows and the second frame 120 is located on the side where the exhaust gas flows.

The inner space 110a is formed in the first frame 110 and the second frame 120 is formed in a shape covering the inner space 110a formed in the first frame 110 But is not limited thereto.

An inner space 110a facing each other is formed in the first frame 110 and the second frame 120 and the first frame 110 and the second frame 120 are coupled to each other to store the elements 2 And may be configured to form one internal space 110a or may be configured in any manner as long as the internal space 110a in which the element 2 can be stored is formed inside the frame.

The first frame 110 and the second frame 120 may each have a communication hole 122 through which the exhaust gas passes.

An element supply hole 113 for supplying the element 2 to the exhaust gas passing through the ceramic filter 130 may be formed on the inner wall of the communication hole 122.

A main supply hole 111 for receiving the element 2 from the outside may be formed at one side of the frame.

The element 2 is supplied from the outside to the inner space 110a through the main supply hole 111 and the element 2 stored in the inner space 110a is supplied to the respective ceramic filters 130, that is, the narrow region where the exhaust gas passing through the ceramic filter 130 is concentrated.

Accordingly, the exhaust gas having the pollutants such as dust and sulfur oxides reduced through the ceramic filter 120 can be mixed with the element 2 injected to the rear end of the ceramic filter 130 more effectively.

At this time, the element 2 may be discharged through the element supply hole 113 by the pressure of the element 2 flowing into the internal space 110a through the main supply hole 111, The exhaust gas may be exhausted toward the exhaust gas passing through the ceramic filter 130.

An inner space 110a capable of storing the element 2 is formed in the frame and an element supply hole 113 for supplying the element 2 to the rear end of the ceramic filter 130 is formed, It is not necessary to form a separate flow path for supplying the element 2 to the filter 130, which is advantageous in that the structure is simple.

The ceramic filter 130 may have a coupling portion 134 for coupling with the communication hole 122.

3 is a cross-sectional view illustrating a first filter assembly in accordance with an embodiment of the present invention.

3, the ceramic filter 130 has a double layer structure of an outer layer 132a and an inner layer 132b having different pore sizes, and the size of the pores of the outer layer 132a is larger than that of the inner layer 132a. 132b, respectively.

And, in the case of a ceramic filter through which the exhaust gas mixed with the element 2 passes, the inner layer of the ceramic filter may contain a catalyst for nitrogen oxide reduction.

That is, the ceramic filter 130 includes the outer layer 132a having a small pore size and the inner layer 132b having a relatively large pore size as compared to the outer layer 132a. In the outer layer 132a, The exhaust gas filtered by the PM can be introduced into the inner layer 132b.

If the exhaust gas passing through the ceramic filter 130 is mixed with the element 2, contaminants such as nitrogen oxides may be removed by the catalyst present in the inner layer 132b. Here, since the pore size of the inner layer 132b is larger than that of the outer layer 132a, the probability of particulate matter interfering with the inner layer 132b and the inner layer 132b is lowered.

The ceramic filter is constructed as described above, and the exhaust gas flowing through the inlet path is removed while passing through the outer layer of the ceramic filter, and the nitrogen oxide can be removed through the inner layer of the ceramic filter.

Since the element 2 is supplied to the rear end of the ceramic filter 130 provided in the first filter assembly 100 and the exhaust gas having passed through the ceramic filter 130 is mixed with the element 2, The ceramic filter 130 provided in the assembly 100 does not necessarily include a catalyst.

The first filter assembly 100 of the present embodiment may be provided with dust removing means (not shown) for removing dust generated on the surface of the ceramic filter 130, which may be implemented in various forms. For example, dust removing means (not shown) may be provided in the form of a vibration unit to remove dust by vibration, or may be provided in the form of a compressed air injection unit to remove dust. Or an electrostatic precipitator may be used.

Meanwhile, the exhaust gas treatment apparatus according to an embodiment of the present invention may further include a second filter assembly 200 provided at a rear end of the first filter assembly 100. The second filter assembly 200 may be provided with one or more filters 210 for reducing the nitrogen oxides contained in the exhaust gas passing through the first filter assembly 100 (see FIGS. 5 and 6).

Here, the filter 210 of the second filter assembly 200 may include a catalyst in order to reduce the nitrogen oxide mixed with the element 2 while passing through the first filter assembly 100.

The filter 210 of the second filter assembly 200 may be a ceramic filter or a honeycomb filter. Contaminants such as dust contained in the exhaust gas are firstly removed from the ceramic filter 130 of the first filter assembly 100 so that the nitrogen oxide can be reduced in the filter 210 of the second filter assembly 200 Anything is acceptable.

Therefore, the exhaust gas flowing into the exhaust gas treatment device passes first through the first filter assembly 100. At this time, the exhaust gas flowing through the ceramic filter 130 passes through the ceramic filter 130 provided in the first filter assembly 100, The dust contained in the exhaust gas can be filtered by the outer layer 132a of the exhaust gas. The exhaust gas from which the dust has been removed may be mixed with the element 2 supplied to the rear end of the ceramic filter 130 while passing through the ceramic filter 130 and may be introduced into the filter 210 of the second filter assembly 200 have.

The filter 210 of the second filter assembly 200 is supported with a catalyst for reducing nitrogen oxide to water and nitrogen so that the nitrogen oxide contained in the exhaust gas passing through the second filter assembly 200 can be removed .

FIG. 4 is a view illustrating a ceramic filter provided in a second filter assembly of an exhaust gas treatment system of a system for simultaneously reducing harmful emissions of exhaust gases according to an embodiment of the present invention. FIG. 5 is a cross- FIG. 2 is a view showing a honeycomb filter provided in a second filter assembly of an exhaust gas treating system of an exhaust gas harmful material simultaneous abatement system according to the present invention.

Hereinafter, a simultaneous exhaust gas reduction system according to an embodiment of the present invention will be described with reference to FIGS. 4 and 5. FIG.

4 and 5, the system for simultaneously reducing exhaust gas pollutants according to an embodiment of the present invention includes an exhaust gas treatment device 10, a lime tank 30, an urea tank 20, A lime supply section, and an element supply section.

The exhaust gas treating apparatus 10 may be provided between the exhaust gas inflow path 10a and the exhaust path 10b.

The exhaust gas treatment apparatus is the same as the above-described exhaust gas treatment apparatus for marine vessel according to the embodiment of the present invention, and a detailed description of the exhaust gas treatment apparatus 10 will be omitted.

The lime tank 30 contains lime inside, which can be any of calcium oxide (CaO) and calcium hydroxide (Ca (OH) 2).

The lime feed section may include a lime oil furnace 31 for flowing the lime contained in the lime tank 30 and a lime feed nozzle 32 for lime injection to the lime oil furnace 31 to inject lime into the exhaust gas inlet.

In this embodiment, one lime feed nozzle 32 is shown as an example. However, a pair of lime feed nozzles 32 are provided so that the lime feed path 31 is connected to each lime feed nozzle 32, And may be formed in various ways.

Accordingly, the lime reacts with the sulfur oxides (SOx) contained in the exhaust gas flowing into the exhaust gas inflow path, thereby increasing the particle size of the reactant. Such reactions are generally known to those skilled in the art, so a detailed description of this reaction will be omitted. Sulfur oxide which has increased in particle size in response to lime is collected together with dust in the surface layer of the ceramic filter 110.

The element supply unit includes an element flow path 21 for flowing an element accommodated in the element tank 20 and an element flow path 21 provided in the element flow path 21 to connect the element to the first filter assembly 100 (Not shown).

In this embodiment, one element supply nozzle 22 is provided as in the case of the above-described lime supply portion, but a pair of element supply nozzles 22 are provided, It is needless to say that the nozzle 22 may be formed in various ways such as a branch.

The elements injected from the urea supply nozzle 22 flow to the respective ceramic filters 130 provided in the first filter assembly 100 and pass through the ceramic filter 130 to remove exhaust gases such as dust, Can be mixed.

Here, the urea supply nozzle 22 can supply the element to the main supply hole 111.

Therefore, the element can move from the element tank 20 to the element supply nozzle 22 through the element flow path 21. [ The element supply nozzle 22 can supply the element to the inner space 110a of the frame by injecting the element into the main supply hole 111. [ Elements stored in the internal space 110a may be supplied to the respective communication holes 122 through the element supply holes 113. [ As a result, the pollutants such as dust and sulfur oxides can be effectively mixed with the exhaust gas reduced through the ceramic filter 130.

Thereafter, the exhaust gas sufficiently mixed with the element may pass through the ceramic filter or the honeycomb filter 210 of the second filter assembly 200 or the like, and the nitrogen oxide may be reduced.

The reaction of these elements with nitrogen oxides is also generally known to those skilled in the art, so a detailed description of this reaction will be omitted.

It will be apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit or scope of the invention as defined in the appended claims. It is obvious to them. Therefore, the above-described embodiments are to be considered as illustrative rather than restrictive, and the present invention is not limited to the above description, but may be modified within the scope of the appended claims and equivalents thereof.

10a: Inflow path 10b: Discharge path
10: Exhaust gas treating apparatus 20: Element tank
21: element flow path 22: element supply nozzle
30: lime tank 31: lime oil
32: lime feed nozzle 100: first filter assembly
110: first frame 110a: inner space
111: main supply hole 113: element supply hole
120: second frame 122: communication hole
130: Ceramic filter 132a: Outer layer
132b: inner layer 134:
200: second filter assembly 210: filter

Claims (10)

A ceramic filter for removing contaminants such as dust contained in the exhaust gas; And
Wherein a ceramic filter is provided and a communication hole through which the exhaust gas filtered by the ceramic filter passes is formed, and the element stored in the internal space passes through the ceramic filter, A first filter assembly provided with a frame adapted to be supplied to the exhaust gas,
And an element supply hole for supplying the element to the exhaust gas passed through the ceramic filter is formed on the inner wall of the communication hole. The method according to claim 1,
And a second filter assembly located at a rear end of the first filter assembly and having at least one filter for reducing nitrogen oxide contained in the exhaust gas that has passed through the first filter assembly. 3. The method of claim 2,
Wherein the filter of the second filter assembly comprises a catalyst for reducing nitrogen oxides. delete The method according to claim 1,
At one side of the frame,
Wherein a main supply hole for receiving the element from the outside is formed. The method according to claim 1,
The frame includes:
A first frame located on a side to which the exhaust gas flows; And
A second frame located on a side from which the exhaust gas flows out;
And an exhaust gas treatment device for treating the marine exhaust gas. The method according to claim 1,
In the ceramic filter,
The pore size is composed of two layers of outer and inner layers,
Wherein the size of the pores of the outer layer is smaller than the size of the pores of the inner layer. The method according to claim 1,
In the ceramic filter,
And an engaging portion that engages with the communication hole. A lime tank in which lime is contained;
An element tank in which an element is accommodated;
An exhaust gas treating apparatus according to any one of claims 1 to 3, and 5 to 8, provided between an intake path and an exhaust path of the exhaust gas;
A lime feeder including a lime oil furnace for flowing the lime contained in the lime tank and a lime feed nozzle provided in the lime oil furnace for supplying the lime to the exhaust gas inflow path; And
An element supply portion including an element flow path for flowing an element accommodated in the element tank and an element supply nozzle provided in the element flow path to supply the element to the exhaust gas processing apparatus;
A system for simultaneously reducing harmful emissions of exhaust gases. 10. The method of claim 9,
The element supply nozzle
Simultaneous reduction system of exhaust gas harmful substance supplying element to main supply hole.

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