KR101245198B1 - Integrated removal apparatus for removing fine particulate and nitrogen oxide - Google Patents

Abstract

PURPOSE: An integrated apparatus for removing fine dust and nitrogen oxides is provided to successively collect fine dust particles at a high efficiency and remove over 90% of nitrogen oxides by an SCR catalyst from exhaust gas in one apparatus, to suppress the increase of the pressure loss of a dust collecting filter, to remarkably improve the filtration rate, and to drastically increase the fine dust collection rate. CONSTITUTION: An integrated apparatus for removing fine dust and nitrogen oxides successively comprises a filtering and dust collecting part(A), a cleaning part(B), an exhaust gas mixing part(C), and an SCR reaction part(D). The filtering and dust collecting part comprises an outer container(1); an inlet and an outlet formed on the both ends of the outer container respectively; and an outer shape successively formed with a first standard hopper(2a), a second standard hopper(2b), a first modified hopper, and a second modified hopper in the lower part of the outer container. The internal space region of the outer shape is divided into first and second chamber space areas comprising an inner container using multiple partition walls and one partition plate, and third and fourth chamber space areas outside of the inner container. Fine dust is removed from each of the divided chamber space areas. The cleaning part removes the fine dust which is filtered by the filtration and dust collecting part. The exhaust gas mixing part injects a reducing agent into the exhaust gas passed the filtration and dust collecting part, and mixes. The SCR reaction part selectively reduces and removes nitrogen oxides from the exhaust gas passed the exhaust gas mixing part. [Reference numerals] (AA) Exhaust gas

Description

Integrated removal apparatus for removing fine particulate and nitrogen oxide}

The present invention relates to an apparatus for removing fused fine dust and nitrogen oxides, and more specifically, fossil fuel combustion, power generation, waste incineration, steelmaking process furnaces and acrons, heat treatment facilities, petroleum refining and petrochemical products manufacturing processes. The dust and nitrogen oxides contained in the exhaust gas are efficiently separated through the dust collector and the SCR (Selective Catalytic Reduction) reaction unit installed in a plurality of chambers. The present invention relates to an apparatus for removing fused fine dust and nitrogen oxides, which discharges through a configured hopper to reduce the load of the filter bag inside the device to increase durability.

Among the representative air pollutants, the fine dust has a particle size range of 0.1 ~ 10μm, mainly fossil fuel combustion, power plant, waste incineration process, blast furnace and arcon of steel making process, heat treatment facility, petroleum refining and petrochemical product manufacturing process. have.

In order to remove fine dust particles and nitrogen oxides discharged from these industrial processes, an electrostatic precipitator, a bag filter, and an SCR (selective catalytic reduction) are used. Hereinafter, with reference to the drawings will be described in the prior art.

4 is an exemplary cross-sectional view of an electrostatic precipitator having four chambers according to a conventional embodiment, FIG. 5 is an exemplary cross-sectional view of a filter precipitator according to a conventional embodiment, and FIG. Exemplary cross-sectional view of a selective reduction catalyst (SCR) system according to an embodiment.

First, as shown in FIG. 4, when a negative electric precipitator applies a negative voltage to a discharge electrode by a DC high voltage, a corona discharge is generated, and negative ions are charged with fine dust particles in the gas, +) By using the electrostatic principle that is collected and moved to the collecting pole where the voltage is applied, it has high initial installation cost and operating cost, and it is affected by electric resistance depending on the type of dust particles, and it is difficult to cope with change quickly.

Also, as shown in FIG. 5, the conventional filter dust collector is a dust collector in which dust particles are collected and removed by fibers or accumulated dust particles while passing through a fibrous dust filter, and have high dust collection performance regardless of the type of dust. Although there is an advantage in that it is relatively easy to operate, when the dust is accumulated in the dust collecting filter and the pressure loss increases, the dust collecting filter needs to be shaken out by applying a physical shock to the dust collecting filter by the injection of high-pressure compressed air. The damaged and woven structure is changed, so the dust collection efficiency is reduced, and thus, the damaged and poor performance of the dust collecting filter is replaced, and the gas suction and degassing air compression at high pressure of the differential filter are expensive.

In addition, as shown in FIG. 6, the conventional selective catalytic reduction (Selective Catalytic Reduction) process is a representative flue gas denitrification technique using a catalyst to reduce nitrogen oxides. As a reducing agent used here, ammonia or urea (Urea) is used to react to reduce nitrogen oxides to nitrogen and water vapor. This selective reduction catalyst technology is widely used as a commercial facility due to the highest and most stable denitrification technology of 70 ~ 90% reduction efficiency compared to the other techniques described above.

On the other hand, there is a limit in obtaining a high efficiency as a single structure device as described above for the removal of fine dust and nitrogen oxides, in order to overcome this point, many hybrid type dust collectors incorporating two or more dust collecting principles have been developed. .

That is, the method according to the filter dust collector described above has to shake off fine dust collected on the surface of the filter cloth by periodic dust-drying operation, but has a disadvantage in that the periodic dust-drying operation damages the filter cloth and shortens its lifespan.

In order to solve this problem, in order to reduce the pressure loss caused by the increase of the dust load in the filter dust collector, an electrostatic precipitator or a centrifugal decipherer and an SCR are installed in front of the filter cloth collector to reduce the load of fine dust and remove nitrogen oxides. A dust collector has been developed.

However, in order to maximize the efficiency of removing dust and nitrogen oxides from industrial processes by combining two or more dust collectors, there is another practical problem that the installation cost must be increased and the installation area must be wide.

Copper oxide catalyst coated ceramic fiber filter material that simultaneously removes high temperature harmful gases and dusts disclosed in the prior art combining two or more of the above-mentioned dust collection technologies, and disclosed a copper oxide (CuO) -supported alumina silicate ceramic fiber filter technology (Korea Patent Application No. 10-1996-08223.

In addition, the applicant's prior application patent is centrifugal force is applied primarily to reduce the load of inflow dust, and the upper part of the filter dust collector is applied to the catalytic coating filter, reducing the nitrogen oxide in the support layer or the rear of the catalyst coating filter There is a bag filter (Korean Patent Application No. 10-2003-0024127) is coated with a reducing catalyst.

However, the alumina silicate ceramic fiber filter technology may cause a problem that most of the dust is attached to the dust collecting filter and the pressure loss is rapidly increased, and thus the dust collecting operation is performed frequently to shake off the attached dust. In addition to shortening the lifespan, it is expected that such an operation will adversely affect the activity of the catalyst inserted into the holder inside the dust collecting filter.

In addition, the dust load reducing dust and dust collector for simultaneous removal of nitrogen oxides (Korean Patent Application No. 10-2003-0024127) has increased the dust removal interval and solved the problem of re-collection after exhaustion, but large dust is collected in the filter cloth Due to this problem, the efficiency of the reduction catalyst was lowered.

As described above, in view of the conventional fine dust and nitrogen oxide removal technology, the economic burden is greatly increased to cope with the stricter regulations on the emission concentration of harmful substances in the flue gas discharged from medium and large discharge facilities including power plants. The need for more efficient removal technologies is emerging.

An object of the present invention for solving the above problems is to divide the internal space region into a plurality of chambers, and to install the filter dust collecting means and SCR catalyst means to increase the pressure loss of the dust collecting filter by filtering and discharging the contaminants in multiple stages. It is to provide a fusion-type fine dust and nitrogen oxide removal apparatus that can provide a high denitrification rate while improving the filtration rate while suppressing.

The present invention to achieve the object as described above and to perform the problem for eliminating the conventional drawbacks, the outer cylinder constituting the main body; Inlets and outlets respectively formed at both ends of the outer cylinder; The outer shape is composed of a first reference hopper, a second reference hopper, a first deformed hopper, and a second deformed hopper that are sequentially formed at the lower end of the outer cylinder, and the inner space region of the outer shape is formed by using a plurality of partition walls and one partition plate. A filter dust collector configured to divide the first chamber and the second chamber space region constituting the inner cylinder, the third chamber and the fourth chamber space region outside the inner cylinder, and then remove fine dust in each of the divided chamber regions; A dust extraction unit configured to exhaust the fine dust filtered by the filter dust collecting unit; An exhaust gas mixing unit for mixing the filter dust collecting unit by injecting a reducing agent into the exhaust gas; It is achieved by providing an apparatus for removing fused fine dust and nitrogen oxides, characterized in that the exhaust gas mixing unit comprises a SCR reaction unit for selectively reducing and removing the nitrogen oxides in the past exhaust gas.

In addition, the present invention is a preferred embodiment, the structure of the outer cylinder or the inner cylinder can be formed in a square cylinder structure or a cylindrical structure.

In another preferred embodiment of the present invention, the filter dust collector is formed in the first chamber space, the first reference hopper and the second reference hopper space to remove the fine dust in the exhaust gas, the filter for each of the lower hole formed in the upper partition plate The bag can be configured for installation.

In another preferred embodiment of the present invention, the dust extraction unit is formed on the upper side of the first chamber to remove the fine dust stuck to the filter bag, venturi provided between the filter bag and the plurality of holes constituting the filter bag; An injector spaced apart from each venturi upper portion; A high pressure air discharge pipe provided with a plurality of injectors; It is installed at one end of the pipe is a back pulsing unit for supplying high-pressure air by continuous or cycle; may be configured.

In another preferred embodiment of the present invention, the exhaust gas mixing unit is formed in the space between the first chamber and the third chamber and the first deformation hopper space region to inject and mix ammonia into the exhaust gas; It may be configured to include a stationary mixer that is installed at one or more of the lower portion of the ammonia injection grid to uniformly mix and distribute the exhaust gas.

In addition, the present invention is a preferred embodiment, the first vane is installed in the bent portion of the second chamber to optimize the flow uniformity of the exhaust gas on top of the ammonia injection grid,

In the lower first modified hopper space of the stationary mixer, second vanes and third vanes may be installed to be symmetrically installed to guide and supply the lower exhaust gas to the third chamber.

In another preferred embodiment of the present invention, the first vane, the second vane, and the third vane may be integrally formed with a diffusion joint having a tapered shape at the rear portion thereof.

In another preferred embodiment of the present invention, the SCR reaction unit includes: a first SCR catalyst module unit in which a plurality of SCR catalyst modules are spaced vertically apart from each other in the third chamber;

In the fourth chamber space, a plurality of SCR catalyst module is composed of a multi-stage composed of a second SCR catalyst module unit spaced apart at regular intervals up and down,

A flow rectifier for evenly distributing exhaust gas may be installed at the lower end of the first SCR catalyst module and the upper end of the second SCR catalyst module.

In another preferred embodiment of the present invention, the fourth vane and the fifth vane are symmetrically installed in the spaces of the third chamber and the fourth chamber, which are upper ends of the first SCR catalyst module and the second SCR catalyst module. Configured to guide the flow,

A sixth vane may be installed in the lower second modified hopper space of the second SCR catalyst module to guide the exhaust gas flow toward the outlet.

In addition, the present invention is a preferred embodiment, the SCR catalyst module may be composed of a honeycomb-shaped SCR catalyst.

In another preferred embodiment of the present invention, the fourth vane, the fifth vane, and the sixth vane may be integrally formed with a diffusion joint having a tapered shape at the rear portion thereof.

In another preferred embodiment of the present invention, the first chamber includes: a first partition wall protruding perpendicularly from the upper portion of the outer cylinder to the lower first reference hopper after passing through the inlet, and serving as a baffle;

A second dividing wall protruding upward from another point of the second reference hopper;

It may be a space formed by the partition plate covering the upper space of the first partition wall and the second partition wall.

In another preferred embodiment of the present invention, the second chamber includes a left side of the third partition wall protruding from the upper portion of the outer cylinder toward the center of the first deformation hopper, and a partition plate and a second partition constituting the first chamber. It may be a space between the outside of the wall.

In another preferred embodiment of the present invention, the third chamber comprises: a right side of a third partition wall constituting the second chamber; It may be a space between the left side of the fourth partition wall protruding upward from the boundary point between the first deformation hopper and the second deformation hopper.

In addition, the present invention is a preferred embodiment, wherein the fourth chamber, the right side of the fourth partition wall constituting the third chamber, and serves as a baffle that protrudes in the direction of the center portion of the lower second deformation hopper from the upper portion of the outer cylinder 5 may be a space between the left side of the dividing wall.

As described above, the present invention uses the four chambers (chamber) to filter the dust collection principle and honeycomb type SCR catalyst in order to efficiently collect the fine dust particles in the exhaust gas in one device and the nitrogen oxides in the exhaust gas from which the fine dust is removed It is possible to remove more than 90% by SCR catalyst,

In addition, the pressure loss of the dust collecting filter is suppressed, the filtration speed is significantly improved, and the collection rate to fine dust is significantly increased.

In addition, since the amount of dust that can be removed increases as the filtration area becomes wider, it is a useful invention having the advantage of lowering the filtration rate and lengthening the filtration duration and lowering the maintenance frequency.

1 is an exemplary cross-sectional view showing an apparatus for removing fused fine dust and nitrogen oxide according to an embodiment of the present invention.
2 is an exemplary view showing a divided chamber space region according to an embodiment of the present invention,
Figure 3 is an exemplary view showing a vane structure according to an embodiment of the present invention,
4 is a cross-sectional view illustrating an electrostatic precipitator having four chambers according to a conventional embodiment.
5 is an exemplary cross-sectional view of a bag filter according to the prior art,
6 is an exemplary cross-sectional view of a selective reduction catalyst (SCR) system according to an exemplary embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a cross-sectional view showing a fusion type fine dust and nitrogen oxide removal device according to an embodiment of the present invention, Figure 2 is an exemplary view showing a divided chamber space region according to an embodiment of the present invention, 3 is an exemplary view showing a vane structure according to an embodiment of the present invention.

As shown, the fusion dust and nitrogen oxide removal device according to the present invention is formed at the front end (one end) of the outer cylinder 1, the outer shape of which is an inlet through which exhaust gas containing fine dust and nitrogen oxide is introduced ( 4) and an outlet 19 formed at the rear end (the other end) to discharge the exhaust gas from which fine dust and nitrogen oxides are removed, and a first reference hopper 2a and a second reference hopper 2b are formed at the lower end of the outer cylinder. And a first deformation hopper 3a and a second deformation hopper 3b formed to have a relatively larger diameter in the first reference hopper 2a and the second reference hopper 2b. It is configured.

Inlet (4) formed on one side of the outer cylinder (1) is a fossil fuel combustion furnace, waste incinerator, blast furnace and arc furnace of the steel making process, coke production equipment, etc. to induce fine dust and nitrogen oxides from the air pollutants introduced do.

On the other hand, the present invention is the outer cylinder; Inlets and outlets respectively formed at both ends of the outer cylinder; A plurality of dividing walls and inner space regions of the outer shape consisting of the first reference hopper (2a), the second reference hopper (2b), the first deformation hopper (3a), the second deformation hopper (3b) sequentially formed on the lower end of the outer cylinder Each chamber region is divided into a space of the first chamber 100 and the second chamber 200 constituting the inner cylinder by using one partition plate, and the third chamber 300 and the fourth chamber 400 outside the inner cylinder. Filter dust collecting portion (A) to remove the fine dust while passing; A dust extraction unit (B) for dedusting fine dust filtered through the filter dust collecting unit; An exhaust gas mixing unit (C) for injecting and mixing a reducing agent into the exhaust gas past the filter dust collecting unit; And an SCR reaction unit (D) for selectively reducing and removing nitrogen oxides in the exhaust gas mixture through the exhaust gas mixing unit.

The reason why the diameter of the lower outlet of the deformation hopper is larger than that of the reference hopper is to allow the inflow and outflow of the circulating air more rapidly and evenly during the rising or falling of the turning air supplied to or discharged from the SCR unit installed in the upper chamber space.

First, the space of the first chamber 100 passes through the inlet (4) having a tapered shape gradually increasing in diameter toward the flow direction of the exhaust gas formed in one direction of the outer cylinder 1, the upper portion of the outer cylinder (1) A first division wall 9a formed to protrude vertically (downward so as not to touch one side of the first reference hopper) and a second reference in a direction of one side of the first reference hopper 2a located at a lower portion at one point; The second dividing wall 9b protruding upward from the other point of the hopper 2b (not protruding upward from the upper outer cylinder), and horizontally in the flow direction of the exhaust gas at the upper part of the first dividing wall 9a; It is a space formed by the partition plate (Shell plate 6) formed in contact with the end of the second partition wall after protruding.

The front sectional structures of the partition plate 6 and the second partition wall 9b may have a bent structure like a "-" shape when the rectangular cylinder structure is taken as an example. The illustrated cross-sectional structure is a front cross-sectional view, but the side cross-sectional structure is not shown, but the dividing wall and the dividing plate are extended to contact with the outer cylinder 1 and are in contact with each other. For reference, each of the dividing walls and the plurality of vanes, which will be described later, may also be configured to be supported by a bracket or the like, which is not shown in the drawings but extends to a point where the outer cylinder 1 meets.

The first dividing wall 9a serves to divide the first chamber space as well as the first reference hopper without the flow of the exhaust gas introduced through the inlet port 4 to the filter bag 5 of the filter bag A, which will be described later. (2a) or the second reference hopper (2b) serves as a baffle to be introduced to the upper portion through the space portion.

That is, the fine dust particles of the impregnated flue gas introduced through the inlet 4 due to the role of the first partition wall 9a collide with the first partition wall 9a serving as a baffle while flowing in the filter bag direction. The flow is prevented from mixing well firstly, and then the first turnover is generated by the first reference hopper 2a or the second reference hopper 2b to rise.

The space of the second chamber 200 protrudes downward from the outer cylinder of the point where the imaginary line extending from the center of the first deformable hopper 3a formed in contact with the second reference hopper 2b to the upper outer cylinder 1 abuts. The left space formed by the third dividing wall 9c (does not protrude to the region of the first deformation hopper 3a). That is, the space formed by the partition plate 6 and the outer cylinder 1 and the left space of the third partition wall 9c are referred to.

The space of the third chamber 300 protrudes upward from the boundary point between the third dividing wall 9c and the first deformed hopper 3a and the second deformed hopper 3b (protrudes upward so as not to contact the upper side of the outer cylinder). The space formed between the fourth division walls 9d).

The space of the fourth chamber 400 is the point where the right side of the fourth dividing wall 9d and the virtual line extending toward the upper outer cylinder 1 near the central region of the second deformable hopper 3b are in contact with each other (the flow direction of the exhaust gas). Refers to a space formed between the fifth dividing wall 9e protruding downward (not protruding to the region of the second deformable hopper 3b) from the start point of the tapered outlet 19 downwardly.

The fourth dividing wall 9d serves not only to divide the fourth chamber space, but also to remove exhaust gas from which nitrogen oxide has passed through the SCR reaction unit D, which will be described later, without being discharged directly toward the outlet 19. 3b) acts as a baffle to rise through the area. The reason for this is not only to stably maintain the selective catalytic reduction process of the flue gas but also to a region larger than the reference hopper even if fine dust or the like remains in the flue gas finally flowing to the outlet through the second deformable hopper 3b at the bottom. The second deformed hopper is formed by turning up and then descended by gravity to be piled up so that it is possible to simply open the hopper later and clean it.

On the other hand, the structure of the outer cylinder (1) may be of a square or rectangular square cylinder structure or a cylindrical structure.

Therefore, in the case of the cylindrical structure, the first partition wall or the second partition wall forming the inner cylinder should be composed of a curved plate rather than a flat plate. The first partition wall, the second partition wall, and the partition plate correspond to a kind of inner cylinder.

In addition, when the cylindrical structure is configured, the third and fourth partitioning walls should also be composed of curved plates rather than flat plates.

Hereinafter, the multi-dust collection structure of the present invention will be described in detail. However, the shape of the outer cylinder is described as a square cylinder shape for convenience, but of course having the same effect as the following technical idea in the case of a cylindrical structure.

In the present invention, the filter dust collecting unit A for removing fine dust is configured in the space of the first chamber 100 and the space of the first reference hopper 2a and the second reference hopper 2b.

The filter bag (Filter bag, 5) is formed at the bottom of each of the plurality of holes 61 formed in the partition plate 6 located above. The plurality of holes are regularly arranged on a partition plate in the form of a square plate (a disc shape when the outer cylinder is formed of a cylindrical structure).

Since the filter bag 5 is provided, the filter bag 5 flows through the inlet port 4 and then hits the first partition wall serving as a baffle plate, and thus has a shape of the first reference hopper 2a or the second reference hopper 2b. As a result, the exhaust gas that has risen in the swirl flow passes through the filter bag, and fine dust contained in the exhaust gas is filtered on the outer surface of the filter bag. Exhaust gas from which the fine dust is removed is introduced into the filter bag and then passed through the SCR part and then discharged through the outlet 14.

The dust removal part B of the present invention is exhausted to the left side of the space of the second chamber 200, that is, to the upper side of the first chamber so that the fine dust filtered on the outer surface of the filter bag during the operation of the bag filter A is exhausted with high pressure air. Part B is configured.

In the dust collecting part B, a venturi 7 is installed between the plurality of holes 61 formed in the partition plate 6 and the filter bag 5 to accelerate the air flow during dedusting, thereby pulsing fine dust adhered to the filter bag. It is settled downward while being exhausted by pulsing. The settled fine dust particles are collected by the first reference hopper 2a or the second reference hopper 2b.

In order to supply high pressure air to the venturi, the venturi is supplied through an injector 8 installed at a predetermined interval apart from each other. In addition, the plurality of injectors 8 are installed in the high pressure air discharge pipe 12, and a bag pulsing unit 11 for supplying high pressure air continuously or periodically is installed outside one end of the pipe 12. To discharge the high pressure air.

When the high pressure air is supplied into the bag filter through the venturi, the high pressure air is pressed in the direction opposite to the inflow direction of the flue gas, that is, from the inside of the bag filter to the outside direction. While being lowered and stacked in the lower first reference hopper 2a and the second reference hopper 2b. Although not shown, the lower part of the hopper is provided with a valve configuration for discharging so that when a certain amount of dust is accumulated, the dust is discharged downward by opening the valve.

The exhaust gas mixing unit C of the present invention uniformly mixes the exhaust gas passing through the filter dust collecting unit A with the reducing agent before being supplied to the SCR reaction unit D to increase the efficiency of removing nitrogen oxides by the catalyst of the multi-configured SCR reaction unit. In the configuration for the right side of the space of the second chamber 200, that is, the space between the first chamber and the third chamber and the first deformation hopper (3a) space.

The configuration of the exhaust gas mixing unit C is provided with a first vane 15a installed at a bent portion of the second chamber so as to guide the incoming flue gas to optimize flow uniformity in the SCR reaction unit D, and a lower portion of the exhaust gas mixing unit C. Thus, an ammonia injection grid 14 for injecting and mixing ammonia as a reducing agent into the exhaust gas stream is installed. The ammonia supplied through the ammonia injection grid is not shown, but is configured to be supplied by an external ammonia storage tank and pump.

In addition, the first vane 15a used in the present invention has an integrally formed diffusion joint 20 at the rear portion thereof, and thus has an inner cylinder (first partition wall 9a, partition plate 6 and second partition wall 9b). ) And the first reference hopper (2a) and the second reference hopper (2b) located at the lower side to facilitate smooth diffusion of the fine dust introduced and to naturally connect the cross-sectional shape or diameter difference between the outer cylinder and the inner cylinder. It is composed. The shape of the diffusion joint 20 has a tapered shape in which the width of one end has a small width, such as a guide vane, and gradually widens toward the rear. The shape of the first vane and the diffusion joint is bent at an angle necessary to guide the flow path of the exhaust gas.

The shape of the second vane 15b, the third vane 15c, the fourth vane 15d, and the fifth vane 15e, which will be described below, is also formed integrally with the diffusion joint like the first vane. Bending at the required angle according to the flow path of the exhaust gas.

At least one lower portion of the ammonia injection grid 14 is provided with a static mixer 16 to ensure additional mixing and distribution of nitrogen oxide in the exhaust gas and ammonia as a reducing agent.

In addition, in the lower space of the stationary mixer, that is, in the space of the first deformation hopper 3a, two second vanes 15b and 3 for guiding and supplying the exhaust gas lowered to serve as the first vane to the third chamber are provided. The vane 15c is installed. The second vane 15b and the third vane 15c are installed symmetrically with respect to the space of the lower first deformation hopper 3a of the second chamber so that the descending exhaust gas is guided upward by the flow path to the right.

In the SCR reaction unit (D) of the present invention, when ammonia as a reducing agent is injected through the exhaust gas mixing unit (C), and when an exhaust gas including nitrogen oxide is introduced, the SCR reaction unit (D) selectively reacts with nitrogen oxide on a catalyst to remove nitrogen oxide. One SCR catalyst module unit 18a is installed in the third chamber 300, and a second SCR catalyst module unit 18b is installed in the fourth chamber 400 space.

The exhaust gas flowing into the SCR reaction unit D is introduced into the secondary swirl flow while passing through the space of the first deformation hopper 3a of the exhaust gas mixing unit C. Fine dust in the exhaust gas from which nitrogen oxide has been removed while passing through the SCR reaction unit D is sedimented by its own weight toward the lower second deformation hopper 3b of the first SCR catalyst module unit 18a or the second SCR catalyst module unit ( It sediments and collects by its own weight toward the lower second deformation hopper 3b of 18b). As such, when the SCR reaction unit (D) consisting of two steps is passed, most of the nitrogen oxides are removed.

The first SCR catalyst module unit 18a and the second SCR catalyst module unit 18b are each provided with a plurality of SCR catalyst modules 181 spaced apart at regular intervals.

In addition, a flow rectifier 17 is installed at the lower end of the first SCR catalyst module unit 18a and the upper end of the second SCR catalyst module unit 18b, so that the exhaust gas is uniformly distributed and uniformly distributed through the SCR catalyst module. It is installed.

In addition, a fourth vane 15d and a fifth vane are formed in the spaces of the third chamber and the fourth chamber, which are upper ends of the first SCR catalyst module unit 18a and the second SCR catalyst module unit 18b. ) 15e is installed symmetrically to guide the flow of exhaust gas passing through the first SCR catalyst module portion 18a from the bottom to the upper portion of the neighboring second SCR catalyst module portion 18b from the top to the bottom. .

In addition, a sixth vane 15f is installed at the lower end of the second SCR catalyst module 18b to guide the exhaust gas passing through the lower portion of the second SCR catalyst module 18b toward the outlet 19.

The SCR reaction unit (D) may be configured in the form of a fixed bed reactor, but preferably uses a low pressure reactor. This is because the low-pressure differential reactor should be able to smoothly perform operations while reducing pressure loss before and after the reactor. Low pressure differential reactors include honeycomb and PPR (Parallel Passage Reactor). The PPR reactor has problems in manufacturing and handling such as catalyst loss and durability caused by the catalyst adhesion process, and the honey used in the present invention A honeycomb reactor having a high contact area as well as a low pressure loss is preferable because of the relatively low contact area compared to the comb method.

A plurality of SCR catalyst module 181 used in the present invention is composed of a honeycomb shaped SCR catalyst. The SCR catalyst module 181 having the honeycomb structure as described above reacts with the exhaust gas containing the nitrogen oxide and the reducing agent ammonia passing therethrough to remove the nitrogen oxide by selective reduction.

The fusion-type fine dust and nitrogen oxide removal device of the present invention configured as described above is installed after the gravity dust collector and the cooling device when installed in the incinerator, and is configured to be exhausted after removing the fine dust and nitrogen oxide.

In addition, when installed in the waste incinerator is installed after the waste heat boiler is configured to remove the fine dust and nitrogen oxides and to exhaust.

In addition, when installed in the glass melting furnace is installed after the exhaust gas cooling device and semi-dry desulfurization device is configured to remove the fine dust and nitrogen oxides and to exhaust.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

Description of the Related Art
(1): outer cylinder (2a): first reference hopper
(2b): 2nd reference hopper (3a): 1st deformation hopper
(3b): Second Modified Hopper 4: Inlet
(5): filter bag (6): divider
(7): Venturi (8): Injector
(9a): 1st partition wall 9b: 2nd partition wall
9c: third partition wall 9d: fourth partition wall
(9e): fifth partition wall 11: back pulsing unit
12: piping 14: ammonia injection grid
15a: 1st vane 15b: 2nd vane
15c: 3rd vane 15d: 4th vane
15e: 5th vane 15f: 6th vane
(16): static mixer 17: flow rectifier
19: outlet 18a: first SCR catalyst module portion
18b: second SCR catalyst module portion 20: diffusion baffle
61: hole 181: SCR catalyst module
100: first chamber 200: second chamber
300: third chamber 400: fourth chamber
(A): bag filter (B): dust collector
(C): flue gas mixing part (D): SCR reaction part

Claims (15)

An outer cylinder 1 constituting the main body; Inlets and outlets respectively formed at both ends of the outer cylinder; The first reference hopper 2a, the second reference hopper 2b, the first deformed hopper 3a, and the second deformed hopper 3b, which are sequentially formed at the lower end of the outer cylinder, form an outer shape. The first chamber 100 and the second chamber 200 space region constituting the inner cylinder using a plurality of partition walls and one partition plate, and the third chamber 300 and the fourth chamber 400 outside the inner cylinder. A filter dust collecting part A for dividing the space into regions and removing fine dust from each of the divided chamber regions; A dust extraction unit (B) for dedusting fine dust filtered through the filter dust collecting unit; An exhaust gas mixing unit (C) for injecting and mixing a reducing agent into the exhaust gas past the filter dust collecting unit; SCR reaction unit (D) for selectively reducing and removing the nitrogen oxides in the exhaust gas past the exhaust gas mixing unit; fusion type fine dust and nitrogen oxide removal apparatus characterized in that it comprises a configuration sequentially.
The method according to claim 1,
The outer cylinder (1) or the inner cylinder structure is a fusion-type fine dust and nitrogen oxide removal device, characterized in that formed in a rectangular cylinder structure or a cylindrical structure.
The method according to claim 1,
The filter dust collecting part A is formed in the space of the first chamber 100 and the space of the first reference hopper 2a and the second reference hopper 2b to remove fine dust in the exhaust gas, and formed on the upper partition plate 6. Apparatus for removing particulate matter and nitrogen oxides, characterized in that the filter bag (5) is installed at each lower portion of the plurality of holes (61).
The method according to claim 1,
The dust collecting part B is formed between the plurality of holes 61 and the filter bag 5 constituting the filter dust collecting part A to remove the fine dust stuck to the filter bag formed on the upper side of the first chamber. A venturi 7; An injector 8 spaced apart from each venturi upper portion; A high pressure air discharge pipe 12 having a plurality of injectors 8 installed therein; Convergence type fine dust and nitrogen oxide removal apparatus, characterized in that consisting of ;;
The method according to claim 1,
The exhaust gas mixing unit (C) is formed in the space between the first chamber and the third chamber and the first deformation hopper (3a) space region to inject and mix ammonia into the exhaust gas, 14 ammonia injection grid (14); Apparatus for removing fine dust and nitrogen oxides, characterized in that it comprises a stationary mixer (16) which is installed at one or more lower portions of the ammonia injection grid (14) to uniformly mix and distribute the exhaust gas.
The method according to claim 5,
The first vane 15a is installed at the bent portion of the second chamber to optimize the flow uniformity of the exhaust gas at the upper portion of the ammonia injection grid 14,
The second vane 15b and the third vane 15c are installed symmetrically with each other so as to guide and supply the lower exhaust gas to the third chamber in the space of the lower first deformation hopper 3a of the stationary mixer 16. Fusion type dust and nitrogen oxide removal device, characterized in that configured.
The method of claim 6,
The first vane (15a), the second vane (15b), the third vane (15c) is a fusion-type fine dust, characterized in that the diffusion joint 20 is formed integrally with a tapered shape in the rear portion, respectively; NOx removal device.
The method according to claim 1,
The SCR reaction unit (D),
A first SCR catalyst module unit 18a having a plurality of SCR catalyst modules 181 spaced vertically apart from each other in the third chamber 300;
In the space of the fourth chamber 400, the plurality of SCR catalyst modules 181 are multistage composed of the second SCR catalyst module unit 18b spaced apart by a predetermined interval up and down,
Fusion rectifier, characterized in that the; is installed on the lower end of the first SCR catalyst module unit 18a and the upper end of the second SCR catalyst module unit 18b, respectively, a flow rectifier 17 for evenly distributing exhaust gas. And nitrogen oxide removal apparatus.
The method according to claim 8,
The fourth vane 15d and the fifth vane 15e are symmetrically disposed in the spaces of the third chamber and the fourth chamber, which are upper ends of the first SCR catalyst module unit 18a and the second SCR catalyst module unit 18b. Installed to guide the flow of exhaust gas,
Fusion vane dust, characterized in that the sixth vane (15f) is installed in the space of the second modified hopper (3b) of the bottom of the second SCR catalyst module unit 18b to guide the exhaust gas flow toward the outlet 19. And nitrogen oxide removal apparatus.
The method according to claim 8,
The SCR catalyst module (181) is a fusion type dust and nitrogen oxide removal device, characterized in that consisting of a honeycomb-shaped SCR catalyst.
The method according to claim 9,
The fourth vane 15d, the fifth vane 15e, and the sixth vane 15f are fused fine dusts, characterized in that the diffusion joints 20 having a tapered shape are integrally formed at the rear portions thereof. NOx removal device.
The method according to claim 1,
The first chamber 100 protrudes vertically in the direction of the lower first reference hopper 2a from the top of the outer cylinder 1 after passing through the inlet 4 and serves as a baffle plate 9a. and;
A second dividing wall 9b protruding upward from the other side of the second reference hopper 2b;
Apparatus for removing fine dust and nitrogen oxides, characterized in that the space formed by the partition plate (6) covering the upper space of the first partition wall (9a) and the second partition wall.
The method according to claim 1,
The second chamber 200 has a left side of the third partition wall 9c protruding from the upper portion of the outer cylinder toward the center of the first deformable hopper 3a, the partition plate 6 constituting the first chamber, and the first chamber. 2. The apparatus for removing fused fine dust and nitrogen oxides, which is a space between the outside of the two dividing walls 9b.
The method according to claim 1,
The third chamber 300 is the right side of the third partition wall (9c) constituting the second chamber; Apparatus for removing particulate matter and nitrogen oxides, characterized in that the space between the left side of the fourth dividing wall (9d) protruding upward from the boundary point between the first deformation hopper (3a) and the second deformation hopper (3b).
The method according to claim 1,
The fourth chamber 400 has a right side of the fourth partition wall 9d constituting the third chamber and a fifth barrier that protrudes from the upper portion of the outer cylinder toward the center portion of the lower second deformable hopper 3b. Apparatus for removing particulate matter and nitrogen oxides, characterized in that the space between the left side of the dividing wall (9e).

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