KR20150002122A - Ceramic Filter Assembly and Toxic Substance Reduction System of Treating Exhaust Gas Having Thereof - Google Patents

Abstract

Disclosed are a ceramic filter assembly and a system for reducing toxic substances in an exhaust gas. The ceramic filter assembly according to an embodiment of the present invention comprises a plate-shaped ceramic filter formed between an inlet passage and an outlet passage of an exhaust gas, reducing dusts, sulfides, nitrides included in the exhaust gas, and having the thickness; and a plat-shaped frame formed on a flow passage where the exhaust gas is moved, and including an insertion hole where the ceramic filter is inserted.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceramic filter assembly and a simultaneous reduction system for exhaust gas containing harmful substances,

TECHNICAL FIELD The present invention relates to a ceramic filter assembly including a ceramic filter and a frame, and a simultaneous reduction system for exhaust gas harmful substances capable of collectively removing sulfur oxides, dusts, and nitrogen oxides as pollutants contained in exhaust gases.

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 ceramic filter assembly that can be installed in a narrow space.

Second, the present invention provides a ceramic filter assembly capable of improving the filtering efficiency.

Third, the present invention provides a ceramic filter assembly capable of reducing its own size of a harmful substance abatement system.

Fourth, the present invention is to provide a system for simultaneously reducing harmful substances in exhaust gas, which can efficiently reduce toxic substances contained in exhaust gas at a low cost.

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.

According to an aspect of the present invention, there is provided a ceramic filter assembly including a ceramic filter and a frame.

The ceramic filter may be formed in a plate shape having a predetermined thickness so that the exhaust gas is introduced into one side of the ceramic filter, filtered, and then discharged to the other side.

The frame may be provided on a flow path through which the exhaust gas flows, and an insertion hole into which the ceramic filter is inserted may be formed.

The frame may have a flange protruding inwardly of the insertion hole to support the ceramic filter.

The ceramic filter may have a shape corresponding to the insertion hole.

The frame may be formed in a plate shape having a curvature, and the ceramic filter may have a curvature corresponding to the insertion hole portion.

The ceramic filter assembly of the present embodiment may be provided with a plurality of the ceramic filter assemblies so as to be spaced apart from each other on the flow path through which the exhaust gas flows.

The ceramic filter may have a two-layer structure of a first layer and a second layer having different pore sizes, and the pore size of the first layer may be smaller than the pore size of the second layer.

The second layer may carry a catalyst for reducing nitrogen oxides.

A plurality of ceramic filter assemblies of this embodiment may be gathered to form one chamber.

Meanwhile, the system for simultaneously reducing exhaust gas pollutants according to an embodiment of the present invention includes a lime tank in which lime is received, an element tank in which elements are accommodated, a ceramic filter disposed between an inlet path and an exhaust path of the exhaust gas, A lime feeder including a lime feed passage for feeding lime contained in the lime tank and supplying the lime to the exhaust gas inflow path, And an urea supply unit which is provided in the urea channel and supplies the element to the exhaust gas treatment unit.

The effects of the present invention will be described below.

First, the ceramic filter assembly according to an embodiment of the present invention can be installed in a narrow space because the ceramic filter and the frame are formed in a plate shape.

Secondly, since the ceramic filter assembly according to an embodiment of the present invention minimizes the volume, a plurality of filters are installed on the flow path through which the exhaust gas moves, so that the exhaust gas is filtered several times, thereby improving the filtering efficiency.

Third, since the ceramic filter assembly according to an embodiment of the present invention does not require a large installation space, the size of the harmful material reduction system itself can be reduced.

Fourth, according to the simultaneous exhaust gas reduction system according to an embodiment of the present invention, harmful substances included in the exhaust gas can be efficiently reduced at a low cost.

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 a perspective view of a ceramic filter assembly in accordance with an embodiment of the present invention;
2 is an exploded cross-sectional view of a ceramic filter assembly according to one embodiment of the present invention;
3 is a cross-sectional view of a ceramic filter assembly according to one embodiment of the present invention;
FIG. 4 illustrates a ceramic filter assembly assembled into a chamber according to an embodiment of the present invention; FIG.
FIG. 5 is a view showing a ceramic filter assembly according to an embodiment of the present invention formed to have a curvature; FIG. And
6 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 a perspective view of a ceramic filter assembly according to one embodiment of the present invention, and FIG. 2 is an exploded cross-sectional view of a ceramic filter assembly according to an embodiment of the present invention.

Hereinafter, a ceramic filter assembly 100 according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG.

1 and 2, a ceramic filter assembly 100 according to an embodiment of the present invention may include a ceramic filter 120 and a frame 110. [

The ceramic filter 120 of the present embodiment is formed in a plate shape having a predetermined thickness so that the exhaust gas is introduced into one surface of the ceramic filter 120 and the exhaust gas is discharged to the opposite surface. This is to be inserted into a plate-shaped frame 110 to be described later to form the ceramic filter assembly 100.

The frame 110 is provided on a flow path through which the exhaust gas flows, and an insertion hole 112 into which the ceramic filter 120 is inserted may be formed. Accordingly, the ceramic filter 120 is inserted into the insertion hole 112, so that the frame 110 and the ceramic filter 120 can form the plate-shaped ceramic filter assembly 100.

When the ceramic filter 120 is inserted into the insertion hole 112, the exhaust gas flows into one side of the ceramic filter 120, Can be discharged to the viewing plane.

A plurality of ceramic filters 120 may be provided, and a plurality of insertion holes 112 into which the ceramic filter 120 is inserted may also be formed.

The frame 110 may be formed with a flange 114 protruding to the inside of the insertion hole 112 to support the ceramic filter 120. The ceramic filter 120 may have a shape corresponding to the insertion hole 112.

That is, the portion of the ceramic filter 120 corresponding to the flange 114 may be formed to fit into the shape of the flange 114. Thus, when the ceramic filter 120 is inserted into the insertion hole 112 of the frame 110, a ceramic filter assembly 100 having no bending plate shape can be formed.

3 is a cross-sectional view illustrating a ceramic filter of a ceramic filter assembly according to an embodiment of the present invention.

3, the ceramic filter 120 has a two-layer structure of a first layer 122a and a second layer 122b having different pore sizes. The pore size of the first layer 122a is May be smaller than the pore size of the second layer 122b. The second layer 122b may carry a nitrogen oxide reduction catalyst.

In addition, the ceramic filter 120 may be arranged such that the exhaust gas flows into the first layer 122a and is discharged to the second layer 122b.

A typical ceramic filter has a hollow shape, one side is opened, and the other side is closed. Thus, the exhaust gas flows into the ceramic filter through the pores formed on the side surface of the ceramic filter and is discharged through the opened side .

However, the ceramic filter 120 of the present embodiment is formed in a plate shape having pores as a whole so as to be combined with the frame 110 to form the ceramic filter assembly 100, The pores of the first layer 122a may be formed smaller than the pores of the second layer 122b.

Accordingly, the exhaust gas flows into the first layer 122a having a relatively small pore size, so that the dust and the sulfur oxide are filtered preferentially, and the exhaust gas from which dust has been removed flows into the second layer 122b, The nitrogen oxide can be removed by the catalyst supported on the catalyst layer 122b.

As a result, the exhaust gas passing through the ceramic filter 120 can be reduced in harmful substances.

FIG. 4 is a view illustrating a plurality of ceramic filter assemblies according to an embodiment of the present invention to form a single chamber. Referring to FIG.

As shown in FIG. 4, the plate-shaped ceramic filter assembly 100 according to an embodiment of the present invention may form one surface of the chamber 12. That is, a plurality of ceramic filter assemblies 100 may be gathered to form one chamber 12.

Accordingly, when the exhaust gas flows into the chamber 12 and the harmful substances contained in the exhaust gas are removed while passing through the ceramic filter 120, or when the exhaust gas flowing into the outside of the chamber is exhausted through the ceramic filter 120 And flows into the chamber 12, so that the harmful substances contained in the exhaust gas can be removed.

FIG. 5 is a view showing a ceramic filter assembly according to another embodiment of the present invention gathered to form a chamber. FIG.

5, the frame 110 may be formed in a plate shape having a curvature, and the ceramic filter 120 may have a curvature corresponding to that of the insertion hole 112.

When the frame 110 and the ceramic filter 120 are formed to have a curvature, the chamber may be formed in a cylindrical shape or the like.

Alternatively, although not shown in the drawings, the ceramic filter assembly 100 of the present embodiment may be provided with a plurality of the ceramic filter assemblies 100 so as to be spaced apart from each other on the flow path through which the exhaust gas flows.

6 is a view showing a simultaneous exhaust gas reduction system according to an embodiment of the present invention.

Hereinafter, an exhaust gas harmful material simultaneous reduction system according to an embodiment of the present invention will be described with reference to FIG.

6, the system for simultaneous abatement of exhaust gas harmful substances according to the first embodiment of the present invention includes an exhaust gas treatment device 10, a lime tank 30, an urea tank 20, And an element supply unit.

The exhaust gas treatment apparatus 10 may be provided between the exhaust gas inflow path 10a and the exhaust path 10b and at least one ceramic filter assembly 100 may be provided inside. Since the ceramic filter assembly 100 is the same as the ceramic filter assembly 100 according to the embodiment of the present invention, detailed description thereof 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, a pair of lime feed nozzles 32 are provided, and the lime feed liquor 31 is branched to each lime feed nozzle 32. Alternatively, the number of lime feed nozzles 32 may be one, And the like.

Accordingly, the lime reacts with the sulfur oxides (SOx) contained in the exhaust gas flowing into the exhaust gas inflow path 10a, and the particle size of the reactant is further increased. Since this is obvious to a person skilled in the art, a detailed description of this reaction will be omitted.

An element is accommodated in the element tank 20 and 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 for supplying the element upstream of the ceramic filter 120 And an element supply nozzle (22). That is, the urea supply nozzle 22 may supply the element to the exhaust gas inflow path 10a or supply the element inside the exhaust gas processing apparatus 10 in front of the ceramic filter 120.

In the case of this embodiment, a pair of element supply nozzles 22 are provided in the same manner as the above-described lime supply portion, the element flow passage 21 is branched to each element supply nozzle 22, May be formed in one or more than one.

In the case of this embodiment, the urea supply nozzle 220 is provided in the exhaust gas inflow path 10a. The elements injected from the element supply nozzle 22 are mixed with the exhaust gas and flowed to each ceramic filter provided in the exhaust gas processing apparatus 10. [

In the present embodiment, the exhaust gas treatment apparatus 10 includes at least one ceramic filter assembly inside. And the ceramic filter of the ceramic filter assembly can reduce dust, sulfur oxides and oxides contained in the exhaust gas.

Specifically, as described above, the sulfur oxide having increased particle size in response to lime is collected together with the dust in the surface layer of the ceramic filter. On the inner side of the ceramic filter, nitric oxide sufficiently mixed with the element is coated on or supported on the ceramic filter The reaction is activated and removed

The reaction of lime with sulfur oxides and urea and nitrogen oxides is generally a matter of ordinary skill 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.

10: Exhaust gas treating apparatus 10a:
10b: exhaust passage 20: urea tank
21: element flow path 22: element supply nozzle
30: lime tank 31: lime oil
32: lime feed nozzle 100: ceramic filter assembly
110: frame 112: insertion hole
114: flange 120: ceramic filter
122a: first layer 122b: second layer

Claims (10)

A plate-shaped ceramic filter disposed between the inlet and outlet paths of the exhaust gas to remove dust, sulfur oxides, and oxides contained in the exhaust gas; And
A plate-shaped frame provided on the flow path through which the exhaust gas flows and on which an insertion hole for inserting the ceramic filter is formed;
≪ / RTI > The method according to claim 1,
Wherein the ceramic filter comprises a catalyst for nitrogen oxide reduction. The method according to claim 1,
And a flange protruding inwardly of the insertion hole to support the ceramic filter is formed in the frame. The method of claim 3,
Wherein the ceramic filter has a shape corresponding to the insertion hole. The method according to claim 1,
Wherein the frame is formed in a plate shape having a curvature, and the ceramic filter has a curvature corresponding to the insertion hole portion. The method according to claim 1,
A plurality of ceramic filter assemblies are provided parallel to each other so as to be spaced apart from each other. The method according to claim 1,
In the ceramic filter,
Layer structure of a first layer and a second layer having different pore sizes,
Wherein a size of the pores of the first layer is smaller than a size of the pores of the second layer. 8. The method of claim 7,
Wherein the second layer carries a catalyst for nitrogen oxide reduction. The method according to claim 1,
A ceramic filter assembly in which a plurality of are gathered to form one chamber. A lime tank in which lime is contained;
An element tank in which an element is accommodated;
An exhaust gas treating apparatus comprising the ceramic filter assembly according to any one of claims 1 to 9 provided between an inlet path and an exhaust path of 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
And an urea supply unit including an urea channel for flowing an element accommodated in the urea tank and an urea supply nozzle for supplying the element upstream of the ceramic filter.

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