KR102275229B1 - Integrated removing apparatus for removing paticulate matter and nitrogen oxide - Google Patents

Abstract

Disclosed is an integrated complex treatment device for filtration and denitrification capable of performing dust collection and denitrification of exhaust gas emitted from a combustion device in one device in an integrated way. The integrated complex treatment device processes filtration and denitrification in an integrated way. A plurality of filters (10) are disposed in a housing, and a dust removal pipe (20) for backwashing is mounted in order to desorb dust attached to the filter (10). A plurality of guide tube bodies (200) are disposed in communication with the filter 10 to introduce a filtered gas. A plurality of filter holes are disposed in communication with the guide tube body (200) to introduce the filtered gas. A denitrification module (300) is disposed in communication with the guide tube body (200), and a plurality of catalyst carriers (310) are disposed in the denitrification module (300) to denitrify the introduced filtered gas. In this case, one unit composed of the filter, the guide tube body (200) and the denitrification module 300 is separated from the other units and processed individually, which is advantageous for ensuring uniformity of denitrification, and reducing a pressure loss and enabling miniaturization and space saving with a simple configuration.

Description

Integrated removing apparatus for removing paticulate matter and nitrogen oxide}

The present invention relates to an integrated combined treatment device for filtration and denitrification, which can process exhaust gas dust collection and denitration in one device.

In general, exhaust gas discharged from combustion devices such as incinerators, combustion furnaces, or combustion engines contains gaseous pollutants or particulate pollutants, and thus an exhaust gas treatment system is required to treat them. The particulate contaminants are removed by filtration and dust collection with a fibrous bag filter or a ceramic filter. In addition, nitrogen oxide is a representative gaseous pollutant, and a catalytic decomposition method and a catalytic reduction method are applied as the denitration method. This is a method of removing nitrogen oxides using a catalyst, and in particular, selective catalytic reduction (SCR) has excellent denitration performance and is widely used to remove nitrogen oxides. The selective catalytic reduction method (SCR) is a method in which an ammonia-based reducing agent such as urea water (UREA) or ammonia water is mixed with exhaust gas and passed through an alumina-based, TiO2-based, or zeolite-based catalyst to denitrate nitrogen oxides in the exhaust gas. . Since the particulate pollutants or nitrogen oxides have different properties, they constitute a separate dust collection system and a denitration system, and are operated in connection with a piping system.

Meanwhile, a low-cost, simple and economical complex treatment device for filtration and denitrification is attracting attention as measures to reduce fine dust and air pollution have become a social issue and installation is mandatory due to strengthened regulations. The complex treatment apparatus for filtration and denitrification can reduce the space due to a small installation, and can reduce installation and maintenance costs, so a practical plan is being sought.

As a prior art of the complex treatment apparatus for filtration and denitrification, an example thereof is disclosed as "integrated complex denitrification system" in Korean Patent Registration No. 10-1041651. Referring to the prior art, the reducing agent is introduced together with the dust, and a plurality of honeycomb-type or corrugated-type catalysts are spaced apart from each other inside the filter cloth. Accordingly, the integrated treatment of filtration and denitrification in one device minimizes the installation space or improves the cost reduction. However, as a large number of catalyst layers are disposed in the filter cloth, there is a problem of differential pressure, and the reducing agent is adsorbed to the dust attached to the filter cloth and the distribution becomes non-uniform, or the flow rate decreases due to a decrease in the flow path in the catalyst layer in the filter cloth, and the pressure loss (hereinafter "pressure loss" There is a problem in that the residence time for denitrification decreases. Moreover, when the reducing agent is introduced together with the dust in an environment where dust adheres to the filter cloth or high-pressure air for dedusting is performed, it is not easy to control the constant equivalent ratio of the reducing agent/processing gas (NH3/NO) or the uniformity of the reducing agent.

Another example of the prior art is disclosed in Korean Patent Laid-Open Publication No. 10-2007-0010725 "Development of dust, nitrogen oxide, and sulfur oxide treatment technology using a dust collector". In the case of the prior art, a reducing agent is injected into the filtered gas and denitrified while passing through the catalyst carrier. Accordingly, the integrated treatment of filtration and denitrification in one device minimizes the installation space or improves the cost reduction. However, it is not easy to control the uniformity of the reducing agent simply by arranging the catalyst layer in a relatively narrow space for filtration and dust collection, and the scale must be increased in order to secure the denitration performance.

Another example of the prior art is disclosed as "integrated exhaust gas purification apparatus" of Korean Patent Registration No. 10-0761014. In the case of the prior art, a reducing agent is added to the filter gas, and turbulence is generated in the grid plate to mix the reducing agent and the processing gas. However, it is not easy to control the uniformity of the reducing agent over the entire area with a simple grid, and the scale must be increased to secure the denitration performance.

Another example of the prior art is disclosed in Japanese Patent Laid-Open Publication No. 200-231200 (P2006-231200A), "Exhaust gas denitration device and integrated filter and dust collector and exhaust gas treatment facility having the same". In the case of the prior art, a support container and a perforated plate are disposed between the filter layer and the catalyst layer, and a reducing agent solution is supplied to the support container so that the solution is vaporized in the flow path and passes through the perforated plate. However, since the reducing agent is limited to the support container and the size of the support container is limited in order to avoid pressure loss, there is a limit to securing the uniformity of the reducing agent over the entire area, and the structure and control are complicated.

Another example of the prior art is disclosed as "A device for removing fine dust and nitrogen oxides of fusion" of Korean Patent Registration No. 10-1245198 and "a device for removing fine dust and nitrogen oxides using pulses" of Korean Patent No. 10-1896948. do. In the case of the prior art, the enclosure is divided into three compartments of a dust collection room, a mixing room and a denitrification room, and filtration/dedusting, mixing of a reducing agent, and catalytic reduction and denitrification are performed in each compartment. A plurality of vanes or through-hole rectifiers are disposed in the empty space in the mixing chamber and the denitrification chamber. Accordingly, the simultaneous treatment of filtration and denitrification in one device minimizes the installation space or improves cost reduction. However, due to compartment division, multiple vanes (prevention of drift) or rectifier arrangement, the structure is complicated and the scale is increased, and the existing connecting pipe is only removed, so the minimization of installation space, cost reduction, or maintenance effect is halved.

As described above, when the filtration system and the denitrification system are integrated, it is advantageous to reduce the installation space or cost, so various types have been proposed. However, since the dust collection system and the denitrification system have different treatment targets and roles, it is not easy to integrate them. In particular, there are difficulties in preventing pressure loss in filter dust collection, securing residence time for denitrification, and uniform mixing of reducing agents. If this problem cannot be solved, the performance decreases due to the difference in reaction time, and the use of reducing agent increases or slip problem occurs. Therefore, a more effective method to cope with these problems is desired.

Republic of Korea Patent No. 10-1041651 Republic of Korea Patent Publication No. 10-2007-0010725 Republic of Korea Patent Registration No. 10-0761014 Japanese Patent Laid-Open No. 200-231200 (P2006-231200A) Republic of Korea Patent Registration No. 10-1245198 Republic of Korea Patent No. 10-1896948

The present invention has been devised to solve the above problems. It integrates filtration and denitrification to enable miniaturization and space saving, and at the same time, the denitration space is divided into a plurality of filtration and denitrification structures that are more advantageous for the removal of nitrogen oxides. An object of the present invention is to provide an integrated complex device.

In order to achieve this object, a plurality of filters are disposed in the housing to remove dust from the exhaust gas discharged from the combustion device, and a dust removal pipe for backwashing is installed in order to desorb the dust attached to the filter. : a plurality of guide tubes disposed in communication with the filter so that the filtered gas passing through the filter can be introduced; and a plurality of denitration modules coupled to communicate with the guide tube body and in which a plurality of catalyst carriers are disposed for denitration of the filtered gas introduced through the guide tube body, including, the filter, the guide tube body, and the denitration module At least two denitrification units are provided, and any one denitrification unit is separated from the other denitrification units to be filtered and denitrified. An integrated complex treatment apparatus for filtration and denitrification is disclosed.

As described above, in the integrated complex treatment device for filtration and dust collection according to the present invention, one unit consisting of a filter, a guide tube and a denitrification module is treated separately from other units, so it is advantageous to ensure uniformity of denitrification and The simple configuration of the denitrification module has the advantage of miniaturization and space saving.

1 is a cross-sectional view showing a complex processing apparatus as a preferred embodiment according to the present invention,
Figure 2 is a perspective view showing the arrangement state of the denitrification unit as a preferred embodiment according to the present invention, partially cut out in the complex processing apparatus;
3 is a perspective view showing two denitration units as a preferred embodiment according to the present invention, partially cut out from the complex treatment apparatus;
FIG. 4 is a side view of FIG. 3 showing two denitration units as a preferred embodiment according to the present invention, partially cut in a complex processing apparatus;
5 is an exploded perspective view of FIG. 3 showing a member of the denitrification unit separated as a preferred embodiment according to the present invention;
6 is a cross-sectional view of FIG. 3 showing a process of denitrification in a denitrification unit as a preferred embodiment according to the present invention;
7 is a perspective view showing the external form of a catalyst carrier as a preferred embodiment according to the present invention, and
8 is a plan view showing the arrangement of the catalyst carrier on the denitration tube as a preferred embodiment according to the present invention.

First, terms used to describe the integrated complex treatment apparatus of filtration and denitrification according to the present invention are defined. "Integrated filtration and denitrification complex treatment apparatus" according to the present invention integrates the process of removing dust, dust or particulate matter and the process of removing nitrogen oxide as a gaseous substance using a catalytic decomposition method or a catalytic reduction method in one device It refers to a device that performs In the following description, the term "complex treatment device" is used to refer to the "integrated combination treatment device for filtration and denitrification" according to the present invention for convenience. And the catalytic decomposition method and the catalytic reduction method are well known in the field of the present invention, and it is obvious to those of ordinary skill in the art, and the complex treatment apparatus according to the present invention is a catalytic reduction method, particularly a selective catalytic reduction method (SCR). This can be preferably applied. Therefore, it will be described below based on the selective catalytic reduction method. In addition, the terms "filter", "particulate matter", "combustion device", "exhaust gas", "filter gas", "mixed gas", and "denitrification gas" are used to describe the present invention. The "filter" includes a bag filter made of a fiber material, a bag filter, or a cartridge type bag filter, and a high temperature filter made of a ceramic material. The "particulate matter" includes dust, dust and other particulate matter generated during combustion. The "combustion device" refers to a device in which particulate matter and nitrogen oxides are generated in a combustion process, such as a boiler, an incinerator, a combustion furnace, or a combustion engine. The "exhaust gas" refers to the gas discharged from the combustion device and introduced into the complex treatment device. The "filtered gas" refers to exhaust gas in which particulate matter is filtered through a filter in the complex treatment device. The "mixed gas" refers to the filtered gas in which the reducing agent is mixed in the complex treatment device. The "denitrification gas" refers to a filtered gas from which nitrogen oxides are removed or reduced by passing through a denitration catalyst in the complex treatment apparatus. Also, the terms "filtration area" and "denitrification area" are used to describe the present invention. The "filtration area" refers to a spatial area before exhaust gas is introduced and passed through a filter, and the "denitrification area" refers to a spatial area before the filtered gas is denitrified and discharged.

A complex processing apparatus will be described as an embodiment according to the present invention. As an embodiment according to the present invention, in the complex treatment device, a plurality of filters are disposed in the housing to remove dust from the exhaust gas discharged from the combustion device, and a dust removal pipe for backwashing is installed to desorb the dust attached to the filter. A device comprising: a plurality of guide tubes disposed in communication with the filter so that the filtered gas that has passed through the filter can be introduced; and a plurality of denitration modules coupled to communicate with the guide tube body, and in which a plurality of catalyst carriers are disposed for denitration of the filtered gas introduced through the guide tube body. The guide body is fixed integrally with the exhaust pipe; It is preferable that the denitration module is detachably coupled to the guide tube body. And, among the at least two flow paths connected from the filter to the denitration module, one flow path may be formed to denitrate independently of the other flow path. In addition, a plurality of flow paths connected from the filter to the denitration module to allow the filtered gas to flow may be formed so that nitrogen oxides of the filtered gas can be removed independently as each flow path.

The catalyst carrier may include: a protrusion having a shape protruding in a direction opposite to the flow direction of the filter gas; and a bent portion bent at the end of the protrusion so that when the filter gas flows along the protrusion, the flow direction of the filter gas can be changed. Preferably, the catalyst carriers are arranged in a plurality of rows, a plurality of catalyst supports are arranged in one row, and the odd-numbered catalyst carriers and the even-numbered catalyst carriers are displaced from each other. The catalyst carrier is preferably a bent plate-shaped member. The denitration module may include: a first porous body provided with a plurality of pores through which the filter gas may pass; and a reducing agent pipe in which a reducing agent injection nozzle is disposed so that the reducing agent is sprayed on the porous body and evaporated. The denitration module includes a second porous body in which pores are formed so that the filter gas passing through the first porous body and the reducing agent collide and diffuse. It is preferable that the pores of the second porous body are larger than the pores of the first porous body. The first porous body and the second porous body are preferably a network structure including a mesh network.

Hereinafter, a complex processing apparatus as a preferred embodiment according to the present invention will be described in more detail with reference to the accompanying drawings.

1 is a cross-sectional view showing a complex processing apparatus as a preferred embodiment according to the present invention.

Referring to FIG. 1 , in the complex treatment apparatus 1 according to the present invention, a plurality of filters 10 are disposed in a housing 30 to remove dust from the exhaust gas discharged from the combustion apparatus, and the filter 10 ), a dust removal pipe 20 for backwashing is installed to remove the dust attached to it.

The housing 30, for example, has an inner space and a hatch door 35 provided in the box shape, and has an inlet 31 and an outlet 32 so that exhaust gas can be introduced into the inner space or denitration gas can be discharged. ) is provided. A partition plate 40 provided with a plurality of filter holes 40a is disposed in the inner space. A filter 10 is mounted in the filter hole 40a, and accordingly, the filter 10 and the partition plate 40 are divided into a filtration area V1 and a denitrification area V2 as a boundary. On the other hand, in the denitration region (V2), spaced apart from the partition plate (40), the exhaust pipe (20) is arranged in multiple rows along the filter row, and the injection nozzle (21) so that air can be sprayed to each filter (10). it is mounted And the exhaust pipe 20 is connected to a pneumatic distributor (Air Header: 23) and a distribution valve (D-valve: 25) so that high-pressure exhaust air can be supplied from the outside of the housing 30 . Accordingly, dust can be desorbed from the filter 10 as the dust is controlled in an intermittent or continuous manner. And the dust desorbed from the filter 10 is collected in the hopper 50, discharged to the outside through the rotary valve 60, the inlet 31 and the outlet 32 of the housing 30 are ducts 70 It is connected to a combustion device (not shown) and an exhaust (ID FAN: 80). On the other hand, in the case of the housing 30, the filter 10, the partition plate 40, or the dust removal pipe 20, since it is widely known as a member of the filter dust collector in the field of the present invention, in order to avoid duplication of the description below, the detailed description thereof is omitted.

Figure 2 is a perspective view showing the arrangement state of the denitrification unit as a preferred embodiment according to the present invention, partially cut away in the complex treatment device, Figure 3 is a preferred embodiment according to the present invention, two denitrification units in the complex treatment device. It is a cutaway perspective view, and FIG. 4 is a side view of FIG. 3 showing two denitrification units as a preferred embodiment according to the present invention, partially cut in a complex treatment apparatus, and FIG. 5 is a preferred embodiment according to the present invention. It is an exploded perspective view of Figure 3 showing the removal of the member of the denitrification unit.

1 to 5 , as a preferred embodiment according to the present invention, the complex treatment apparatus 1 includes a plurality of filters disposed in communication with the filter 10 so that the filtered gas passing through the filter 10 can be introduced. A plurality of guide tubes 200 and a plurality of denitration modules 300 coupled to communicate with the guide tube 200 and in which a plurality of catalyst carriers 310 are disposed for denitration of the filtered gas introduced through the guide tube 200 ) is provided. Here, the filter 10, the guide tube 200, and the denitration module 300 are disposed in communication with each other to form one denitration unit 100 in which exhaust gas is sequentially flowed while filtering and denitrifying, and the other denitration unit (100) to be independently filtered and denitrified.

The guide tube 200 is a hollow tube as an example shown, and is located between the dividing plate 40 and the exhaust pipe 20 .

The lower end of the guide tube body 200 is in close contact with the partition plate 40 in a state in which the sealing material 12 is placed while surrounding the filter hole 40a. In the case of the illustrated example, the guide tube 200 is a square tube including two filter holes 40a, but in the case of its size or shape, it can be adjusted according to the density, particle size, dust collection rate or denitration rate of the dust. Although it cannot be determined by law, it is preferable to include a filter group in which exhaustion control is performed simultaneously or a small difference in exhaustion interval, for example, a filter group in which exhaustion control is simultaneously performed with the distribution valve 25 or a part thereof, so as to be denitrified together.

The upper end of the guide tube body 200 is wrapped in close contact with the exhaust pipe 20 . And the compressed gas injection nozzle 21 arranged downward is located in the exhaust pipe 20 . Here, the exhaust pipe 20 is preferably arranged so that the flow of the filter gas is not disturbed, and for this purpose, the length of the guide pipe 200 is preferably at least the radius of the filter 10 . In addition, the guide tube body 200 may have a structure detachably attached to the vibration exhaust pipe 20, but since there is little risk of failure, it is preferable to fix it integrally by welding or other bonding. And it is preferable that the guide tube body 200 is detachably coupled to the nitrogen removal module 300, and for this purpose, a hinge bolt 210 mounted with a hinge pin 210 so as to be rotated outward is provided.

The denitrification module 300 is an integral structure, and the boundary is unclear or there is no practical benefit, but when viewed separately for convenience of understanding and explanation, hollow denitrification tubes 323 and 325, the denitrification tube ( 323 and 325 are disposed inside the reducing agent injection nozzle 91 connected to the reducing agent pipe 90, the first porous body disposed inside the denitration tube body 323 and 325 and provided with a plurality of pores to allow the filtered gas to pass therethrough (330), the second porous body (340) disposed inside the denitration tube body (323, 325) and provided with a plurality of pores so that the filter gas and the reducing agent that have passed through the first porous body (330) collide and diffuse , a plurality of catalyst carriers 310 spaced apart from each other are included in the denitration tube body 323 and 325 . Here, the reducing agent injection nozzle 91 is preferably arranged in the forward direction of the filtering gas so that it can be smoothly injected according to the flow of the filtering gas.

The denitrification tube body (323, 325) may be a single structure or a combination of several structures. As shown in the illustrated example, if the denitration tube body is divided into two to be attached and detached, it can be easily replaced, which is preferable in terms of maintenance. Therefore, the denitration pipe body (323, 325) is disposed between the dust removal pipe 20 and the reducing agent pipe 90, the first denitration pipe body 323 coupled to the guide pipe body 200, the reducing agent pipe 90. A second denitrification tube body 325 coupled to the first denitrification tube body 323 is included therebetween. Here, the induction pipe 200, the exhaust pipe 20, the first denitration pipe 323, the reducing agent pipe 90, and the second denitration pipe 325 are interposed between the sealing materials 13, 14, and 15) It is preferable to seal it with a filter so that the filter gas does not flow out. On the other hand, when the catalytic reduction method is not applied or a reducing agent pipe is unnecessary, the first denitration tube 323 may be omitted and it may be configured as a single denitration tube, which is self-evident, so the description thereof will be omitted to avoid duplication.

The second denitration pipe body 325 has a flange 327 protruding outward so that the hinge bolt 210 can be fixed, and the flange 327 has a hinge bolt 210 that can be inserted and detached. A receiving groove 327a is provided. Here, the hinge bolt 210 and the flange 327 show an example of a fastening means in which the guide tube body 200 and the nitrogen removal module 300 are detachably coupled, and such fastening means are known in the field of the present invention. various members, for example, different types of bolts, or they may be joined by clamps or hooks. However, when using the hinge bolt 210 as in the illustrated example, it does not occupy a lot of space, and furthermore, the first denitrification tube 323 is disposed between the guide tube 200 and the second denitrification tube 325 . Since it can be combined simply by letting the user know, it can be easily hung and locked or separated in a narrow space, making work easier.

The first porous body 330 is mounted inside the second denitration tube body 325, is disposed on the downstream side of the reducing agent injection nozzle 91, and a plurality of pores are provided so that the filter gas can pass therethrough. . Here, the distance between the first porous body 330 and the reducing agent injection nozzle 91 may vary depending on the flow rate of the filtered gas or operating conditions, but the reducing agent, especially ammonia water, is sprayed and disposed so that it can be located throughout the entire area. it is preferable In addition, the second porous body 340 is mounted inside the second denitration tube body 325, is spaced apart from the first porous body 330, and is disposed on the downstream side, so that a plurality of filter gases can pass therethrough. The groundwork of On the other hand, the first porous body 330 and the second porous body 340 include a plurality of pores, and it is preferable to have a network structure including a mesh network for reducing pressure loss and smooth flow of the filtered gas. In addition, the pores of the second porous body 340 are preferably formed larger than the pores of the first porous body 330 .

The catalyst carrier 310 is spaced apart from the second porous body 340 inside the second denitration tube body 325 and fixed to the downstream side, and a plurality of catalyst carriers 310 are disposed to be spaced apart from each other. The catalyst carrier 310, as is known in the art, the catalyst may be extruded together with the carrier or coated on the carrier, and the catalyst may be an alumina-based, TiO2-based, or zeolite-based catalyst. have.

6 is a cross-sectional view of FIG. 3 showing a process of denitration treatment in a denitrification unit as a preferred embodiment according to the present invention, and FIG. 7 is a perspective view showing the external form of a catalyst carrier as a preferred embodiment according to the present invention, and 8 is a plan view showing the arrangement of the catalyst carrier on the denitration tube as a preferred embodiment according to the present invention.

6 to 8, the catalyst carriers 310 are arranged in a direction crossing the flow direction of the filter gas and arranged in a plurality of rows, a plurality of catalyst carriers 310 are arranged in one row, and in odd rows The catalyst carriers 310 and the even-numbered columns of the catalyst carriers 310 are disposed to be shifted from each other. In this case, the filter gas passes between the catalyst carriers 310, and when the flow path is reduced, the space velocity increases, thereby reducing the residence time and increasing the pressure loss. It is preferable to make it larger than the gas passage hole 10a flowing into the guide tube body 200 . In addition, the catalyst carrier 310 has a protrusion 313 having a shape protruding in the opposite direction to the flow direction of the filter gas, and when the filter gas flows along the protrusion 313, the flow direction of the filter gas can be changed. A bent portion 315 of a bent shape is provided at the end of the protrusion 313 so as to be bent.

The protrusion 313, to be described more specifically as an example thereof, has the same shape as a plate-like member having a shape extending in the longitudinal direction, bent in both directions in the width direction, and inclined, for example, in a “V” cross-sectional shape. Accordingly, drift or flow deviation can be reduced, which is preferable. Moreover, when the catalyst carriers 310 are arranged in multiple rows and displaced from each other at the same time, the three catalyst carriers 310 adjacent to the front, rear, left and right constitute one denitrification cell, and have two inlets and one outlet and an inside thereof. A cell area of . In addition, the bent portion 315 is positioned at both ends of the protrusion 313 , and has a curved shape in a direction opposite to the bending direction of the protrusion 313 or opposite to the gas flow. Here, the protrusion 313 and the bent portion 315 have been described and illustrated in more detail for the convenience of explanation and understanding, but the shape or arrangement may be variously changed by means of a gas dispersion or denitrification cell. Of course.

As a preferred embodiment according to the present invention as described above, the function and effect of the complex processing apparatus will be reviewed.

First, with reference to the accompanying drawings, the installation process of the guide tube body and the nitrogen removal module as a preferred embodiment according to the present invention will be described.

Referring to FIGS. 1 and 2 , 4 and 5 , the guide tube body 200 according to the present invention is integrally attached to the exhaust pipe 20 and is disposed on the partition plate 40 . At this time, the induction pipe body 200 communicates with the two filters 10 , and surrounds the two filter holes 40a, and the injection nozzle 21 of the exhaust pipe 20 moves the air toward the filter 10 . positioned so that it can be sprayed. And the guide tube body 200 is longer than the radius of the filter 10, so the exhaust pipe 20 is also located higher than the radius of the dividing plate 40. Accordingly, in the guide pipe body 200, the filter gas by the exhaust pipe 20 can flow smoothly without clogging the flow path.

The guide body 200 and the denitration module 300 are detachable, and since the reducing agent pipe 90 must pass through the denitration module 300, the first denitration tube body 323 and the second denitrification tube body (325). First, when the denitration module 300 is to be fixed to the guide tube body 200, the first denitration tube body 323, the reducing agent pipe 90, and the second of the denitration tube body 325, and the sealing materials 13, 14, 15 are sequentially arranged, and the hinge bolt 210 is pushed into the bolt receiving groove 327a of the flange 327, and then fastened with the nut 220. , the guide tube 200 and the denitrification module 300 are integrally coupled. Next, if you want to separate the guide tube body 200 from the denitrification module 300, loosen the nut 220 and take out the hinge bolt 210 from the bolt receiving groove 327a. 2, the denitrification tube 325 is easily separated.

In this way, the guide pipe body, which requires relatively little dismantling or maintenance, is integrated with the dust removal pipe 20 and has a high rigidity structure, and as a consumable member, the second denitrification pipe body 325 is a detachable structure, so that it can work and work in a narrow space. Maintenance is convenient. Moreover, even if the denitrification module 300 is divided into two, the first denitrification tube 325 between the guide tube 200 and the second denitrification tube 325 can be combined simply by pressing and fixing it. Reduced labor and easy to attach and detach. In addition, the induction pipe body 200, the dust removal pipe 20, the reducing agent pipe 90 and the nitrogen removal module 300 are sealed with sealing materials 12, 13, 14, 15 so that an independent flow path is communicated with the filter therein. As it is formed, denitrification treatment is possible by concentrating on the exhaust gas of the unit area.

Next, with reference to the accompanying drawings, a filtration and denitrification process of the complex treatment apparatus as a preferred embodiment according to the present invention will be described. .

Referring to FIGS. 1 and 2 , when the combined treatment device 1 according to the present invention is connected to the combustion device and the exhaust 80 and the duct 70 , the exhaust gas flows into the filtration area V1, and the filter 10 ), the dust is removed and flows to the denitrification area (V2). When dust accumulates in the filter 10, the differential pressure increases. In order to solve this problem, high-pressure air is supplied from the pneumatic system of the exhaust pipe 20 intermittently or periodically, and is sprayed into the filter 10 through the injection nozzle, and is desorbed. The dust is discharged to the outside through the hopper 50 and the rotary valve (60). In general, the exhaustion device is processed sequentially or continuously for each piping line in consideration of the exhaustion efficiency. In the case of the composite device according to the present invention, the denitration unit 100 includes two filters 10 adjacent to each other along the dust removal pipe 20, and is separated from the other denitration units 100 in an area with a small flow deviation. Since denitration can be concentrated on the filtered gas, it is possible to reduce performance degradation due to flow deviation or non-uniform distribution of reducing agent in the filtration area (V1) or denitration area (V2).

Referring to FIGS. 1 and 6 , the filter gas passing through the filter 10 passes through the dividing plate 40 and flows into the guide tube body 200 . At this time, the exhaust pipe 20 is separated from the dividing plate 40 by a radius of the filter 10 or more, so that the filter gas can be smoothly introduced therebetween. And when the reducing agent is injected, it collides with the first porous body 330 on the downstream side along the forward direction of the filter gas, and when the reducing agent, particularly, ammonia water is sprayed, it sticks to the first porous body 330 . When the filter gas flows in a high-temperature environment and passes through the pores of the first porous body 330, the reducing agent particles evaporate by convective heat transfer and flow together. Accordingly, the filter gas and the reducing agent can be mixed more uniformly. In general, when filtration and denitrification are integrated with one device, the uniformity of the reducing agent is a problem with a relatively short residence time and a narrow space. By the evaporation action of the first porous body 330 and the reducing agent according to the present invention, The uniformity of the reducing agent can be improved.

Referring to FIG. 6 , the mixed gas passing through the first porous body 330 passes through the second porous body 340 . The pores of the second porous body 340 are larger than the pores of the first porous body 330 . Accordingly, the diffusion of the mixed gas in the flow path is accelerated, and in particular, even when unevaporated particles are present in the mixed gas that has passed through the first porous body 330 depending on the spray conditions, flow rate, and other load variations, the second porous body 340 is It can adhere and evaporate, improving the mixing and uniformity of the reducing agent.

6 to 8 , the mixed gas passing through the second porous body 340 is introduced into a plurality of crossed catalyst carriers 310 arranged in multiple rows. At this time, the catalyst carrier 310 is disposed to be spaced apart from each other to form a flow path that is wider than the flow path of the filter 10 , and when branched from the protrusion 313 and introduced into the cell region along the inclined surface, at the bent portion 315 . The degree of congestion may increase inward or turbulence may be formed in the cell region, so that the contact with the catalyst carrier 310 is improved, thereby improving the denitration performance.

As described above, the complex processing apparatus as a preferred embodiment according to the present invention has been described and illustrated in more detail and specifically with reference to the accompanying drawings, but it should be understood as described and illustrated as a preferred embodiment, and the above-described shape or It should not be construed as limited to shape or structure, reference signs, accessories or parts, and should not be construed as limited by using other documents against the description of the present invention, and the scope of the complex processing device according to the present invention is defined in the appended claims. should be defined by the scope.

1: complex processing device 10: filter
11, 12, 13, 14, 15: sealing material 20: exhaust pipe
21: compressed gas injection nozzle 23: pneumatic distributor
25: distribution valve 30: housing
31: inlet 32: outlet
40: divider 40a: filter ball
50: hopper 60: rotary valve
70: duct 80: ejector
90: reducing agent pipe 91: reducing agent injection nozzle
100: denitrification unit 200: guide tube body
210: hinge bolt 211: hinge pin
300: denitration module 310: catalyst carrier
313: protrusion 315: bent part
323: first denitrification tube 325: second denitrification tube
327: flange 327a: bolt receiving groove
330: first porous body 340: second porous body
V1 : Filtration area V2 : Denitrification area

Claims (10)

In an apparatus in which a plurality of filters are disposed in the housing to remove dust from the exhaust gas discharged from the combustion device, and a dust removal pipe for backwashing is installed to desorb the dust attached to the filter:
a plurality of guide tubes disposed in communication with the filter so that the filtered gas passing through the filter can be introduced; And
a plurality of denitration modules coupled to communicate with the guide tube body and in which a plurality of catalyst carriers are disposed for denitration of the filter gas introduced through the guide tube body; and, including, the filter, the guide tube body, and the denitration module At least two units are provided, and any one of the denitrification units is separated from the other denitrification units to be filtered and denitrified.
The method of claim 1,
The guide body is fixed integrally with the exhaust pipe;
The denitration module is an integrated complex treatment device for filtration and denitrification, characterized in that it is detachably coupled to the guide tube body. The method of claim 1,
Among the at least two flow paths connected from the filter to the denitration module, one flow path is formed to denitrate independently of the other flow path. The method of claim 1,
The catalyst carrier,
a protrusion having a shape protruding in a direction opposite to the flow direction of the filter gas;
and a bent part bent at the end of the protrusion so that when the filter gas flows along the protrusion, the flow direction of the filter gas can be changed. The method of claim 1,
The catalyst carriers are
An integrated complex treatment apparatus for filtration and denitration, characterized in that arranged in a plurality of rows, a plurality of catalyst supports are arranged in one row, and the odd-numbered catalyst carriers and even-numbered catalyst carriers are displaced from each other. 6. The method according to claim 4 or 5,
The catalyst carrier,
An integrated complex treatment device for filtration and denitrification, characterized in that it is a bent plate-shaped member. The method of claim 1,
The denitrification module is
a first porous body having a plurality of pores through which the filter gas can pass;
The integrated complex treatment apparatus for filtration and denitration, characterized in that it further comprises a reducing agent pipe in which a reducing agent injection nozzle is disposed so that the reducing agent is sprayed on the porous body and evaporated. 8. The method of claim 7,
The denitrification module is
The integrated complex treatment apparatus for filtration and denitrification, characterized in that it further comprises a second porous body having pores formed so that the filter gas passing through the first porous body and the reducing agent collide and diffuse. 9. The method of claim 8,
The pores of the second porous body,
An integrated complex treatment apparatus for filtration and denitrification, characterized in that the pores are larger than the pores of the first porous body. 10. The method of claim 9,
The first porous body and the second porous body,
An integrated complex treatment device for filtration and denitrification, characterized in that it is a network structure including a mesh network.

Images