KR101910874B1 - Apparatus for controlling nitrogen oxide for thermal plant - Google Patents

Abstract

Provided is a nitrogen oxide treatment apparatus for a thermoelectric power plant. The apparatus comprises: a first nozzle unit disposed on a rear end of a gas turbine in an exhaust gas moving passage between the gas turbine and a stack; a second nozzle unit disposed between the first nozzle unit and the stack; at least one denitrification catalyst module disposed between the first nozzle unit and the stack; a reducing agent tank, wherein a reducing agent for reducing the nitrogen oxide of the exhaust gas in the moving passage as a liquid phase; a first pipe line connected between the reducing agent tank and the first nozzle unit and supplying the reducing agent to the first nozzle unit; a second pipe line connected between the reducing agent tank and the second nozzle unit; and a vaporizer installed on the second pipe line, vaporizing the reducing agent, and supplying the same to the second nozzle unit.

Description

[0001] The present invention relates to a nitrogen oxide treatment apparatus for a thermal power plant,

The present invention relates to a nitrogen oxide treatment apparatus, and more particularly, to a nitrogen oxide treatment apparatus for a thermal power plant.

Electricity is mostly produced in large-scale power generation facilities. In power plants, thermal power generation method that burns fuel mainly, nuclear power generation method that uses nuclear energy, and hydro power generation method which utilizes fluid drop are developed. In other power generation facilities, power generation method using solar heat, Is also being used.

Among them, thermal power generation is one of the power generation methods that are still actively used until now, which is a power generation method of driving turbines by burning fuel. In order to get power from a thermal power plant, it is necessary to consume fuel continuously, and the fuel burns in the gas turbine and generates a large amount of exhaust gas (exhaust gas). Such flue gas contains contaminants generated by combustion reaction of fuel and high-temperature thermal reaction, and special treatment is required.

In particular, nitrogen oxides in flue gas are harmful contaminants that cause adverse effects on the respiratory system and are very dangerous if they are not properly treated and released as they are. As a result, a technique for reducing nitrogen oxides (for example, Korean Utility Model No. 20-0179069) has been developed, but the effect has not been satisfactory. Particularly, there is a demand for a technology that can more effectively treat nitrogen oxides in a flue gas of a facility which continuously changes operating conditions such as a thermal power plant and discharges flue gas for a long time, but a satisfactory alternative is not proposed It is true.

Korean Utility Model Registration No. 20-0179069, (Apr. 15, 2000), specification

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a nitrogen oxide treatment apparatus for a thermal power plant.

The technical problem of the present invention is not limited to the above-mentioned problems, and another technical problem which is not mentioned can be clearly understood by those skilled in the art from the following description.

The apparatus for treating nitrogen oxides of a thermal power plant according to the present invention comprises a first nozzle unit disposed at a rear end of the gas turbine in a flue gas passage between a gas turbine and a stack; A second nozzle unit disposed between the first nozzle unit and the stack; At least one denitration catalyst module disposed between the first nozzle portion and the stack; A reducing agent tank in which a reducing agent for reducing nitrogen oxides of the exhaust gas in the moving passage is stored in a liquid phase; A first pipe line connected between the reducing agent tank and the first nozzle unit to supply the reducing agent to the first nozzle unit; A second pipe line connected between the reducing agent tank and the second nozzle unit; And a vaporizer installed on the second pipeline to vaporize the reducing agent and supply the vaporized second reducing agent to the second nozzle part.

Wherein the nitrogen oxide processing apparatus further comprises a third piping line branched from the second piping line and connected to the moving path, the vaporizer being disposed at a branch point of the second piping line and the third piping line, The reducing agent may be mixed with the exhaust gas flowing through the third piping line and vaporized.

The vaporizer may heat exchange the steam with the steam to vaporize the reducing agent.

The nitrogen oxide treatment apparatus may further include a supply unit for supplying the nitrogen-based reducing agent to a front end of the NO x removal catalyst module.

The non-lipid reducing agent may be at least one selected from ethanol, ethylene glycol, and glycerin.

The nitrogen-based reducing agent may be at least one selected from ammonia and urea.

The supply unit may supply the nitrogen-based reducing agent when the temperature inside the moving passage is equal to or higher than a set temperature.

Wherein the supply unit includes a storage tank in which the nitrogen-based reducing agent is stored in at least one state selected from a liquid phase or a vapor phase, a fourth pipe line connected between the storage tank and at least one of the first nozzle unit and the second nozzle unit, And a regulating valve which is controlled according to the temperature of the moving passage and regulates the supply amount of the nitrogen-based reducing agent supplied through the fourth pipe line.

The nitrogen-based reducing agent stored in the storage tank in a liquid state may be introduced into the vaporizer through the fourth pipeline, vaporized, and supplied to the second nozzle unit.

The second piping line and the fourth piping line may share a part of the piping connected to the second nozzle unit.

The fourth piping line may be branched from the second piping line between the vaporizer and the reducing agent tank and connected to the storage tank.

The first piping line and the second piping line may share portions of the piping connected to the reducing agent tank.

At least two of the reducing agent tanks may be disposed independently of each other, and the first piping line and the second piping line may be independently connected to the respective reducing agent tanks.

Wherein the moving passage includes an expansion portion connected to the stack side and having a relatively wide width, and an axial tube portion contracted from the expansion portion and connected to the gas turbine side, wherein the first nozzle portion is located in the axial tube portion, 2 nozzle portion can be located in the expansion portion.

Wherein the moving passage includes an expansion pipe portion connected to the stack side and having a relatively wide width, an axial pipe portion contracted from the expansion pipe portion and connected to the gas turbine side, and a plurality of superheater bundles disposed in the expansion pipe portion, The first nozzle portion may be located within the shaft portion, and the second nozzle portion may be located between the superheater bundles.

Wherein the nitrogen oxide processing apparatus comprises a first signal indicating an operating state of the gas turbine, a second signal indicating a component of the exhaust gas in at least one of the moving passage and the stack, And a third signal indicating a temperature inside at least one of the first nozzle unit and the second nozzle unit, and a control unit for controlling the fluid discharge amount of the first nozzle unit and the second nozzle unit by sending out a control signal .

Wherein the first nozzle unit includes a reducing agent flow path for flowing the reducing agent, an adiabatic flow path for flowing the adiabatic fluid and surrounding the reducing agent flow path, and a pressurized gas flow path for flowing the pressurized gas, And at least one injection nozzle in which a fluid discharge port communicating with the gas flow path is disposed.

And the pressurized gas flow path may be disposed between the reducing agent flow path and the heat insulating flow path.

The pressurized gas flow path may be disposed around the outer periphery of the reducing agent flow path.

The reducing agent flow path may be disposed around the outer periphery of the pressurized gas flow path.

The pressurized gas flow path may be spaced apart from the reductant flow path, and the heat insulating flow path may also surround the pressurized gas flow path.

The pressurized gas flow path may be separated from the reductant flow path, and an additional heat insulating flow path surrounding the pressurized gas flow path may be formed.

Wherein the nitrogen oxide processing apparatus comprises an inner rail disposed across the inside of the moving passage, an opening formed in one side of the moving passage facing the end of the inner rail, An outer rail facing the opening and being connected through the opening between the inner rail and the outer rail or being separated from at least one of the inner rail and the outer rail, And a moving rail portion that is separated from the outer rail, and the denitration catalyst module can be supported on the inner rail.

Wherein the denitration catalyst module moves on the inner rail, the moving rail, and the outer rail in a state where the moving rail is connected between the inner rail and the outer rail through the opening, And can be moved in or out of the moving passage.

The nitrogen oxide processing apparatus may further include an airtight door portion interposed between the moving rail and the inner rail and the outer rail to selectively seal the opening.

Wherein the airtight door portion has a first hinge at one end thereof coupled with a first hinge at one side of the opening portion and a second hinge at least a portion of which rotates at the other side of the opening portion and overlapped with the other end portion of the airtight door portion, A screw fixture that is vertically coupled to the hermetic seal portion through the second hinge may be formed on one side of the hermetic seal portion that overlaps the hermetic seal portion.

Wherein at least one of the inner rail portion, the outer rail portion, and the moving rail portion includes a pair of guide bars parallel to each other, And a plurality of guide rollers for supporting the denitration catalyst module.

The inner rail portion includes the guide bar and the guide roller, and at least a part of the guide bar may be extended in the width direction to shield a space between the guide roller and the NO x removal catalyst module.

One end of the moving rail part is foldably coupled to one of the inner rail and the outer rail and the other end is separable from the other one of the inner rail and the outer rail.

The moving rail portion may be detachable from both the inner rail and the outer rail.

The NO x removal apparatus may include a plurality of NO x removal catalyst modules and at least one of the plurality of NO x removal catalyst modules may surround at least a part of the space between the NO x removal catalyst modules to block the movement of the exhaust gas. And an outer shielding plate between the denitration catalysts.

The NO x removal device may include a plurality of NO x removal catalyst modules formed on at least one of the plurality of NO x removal catalyst modules and at least a part of the NO x removal catalyst modules interposed in the space between the NO x removal catalyst modules to block the movement of the exhaust gas And an inner denudation catalyst interposed between the denitration catalyst modules, at least a part of which is elastically deformed to be compressed or elongated, and adjusting the distance between the denitration catalyst modules.

Wherein the inner shielding plate between the denitration catalysts includes a base fixed to the denitration catalyst module and at least two swash plates extending outwardly of the base and bent at an angle to each other and at least partially elastically deformable, The inclination angle between the swash plates varies and can be compressed or stretched.

The swash plate may include a first swash plate extending in one direction from the base and having a relatively short length and a second swash plate extending from the first swash plate to the other and longer than the first swash plate.

According to the present invention, the nitrogen oxide contained in the exhaust gas can be treated very effectively. Particularly, the nitrogen oxide contained in the flue gas of the thermal power plant can be treated very effectively in response to the characteristics of the thermal power plant which not only fluctuates from time to time but also discharges the flue gas continuously for a long time. In addition, the treatment efficiency of nitrogen oxides can be kept high, so that air pollution can be minimized and the power generation facility can be operated smoothly. In addition, through the characteristic structural design of the device, it is possible to treat nitrogen oxides in response to changes in the condition of the flue gas, and the process such as maintenance and management of the device can proceed very smoothly.

1 is a view conceptually showing an apparatus for treating nitrogen oxides in a thermal power plant according to an embodiment of the present invention.
2 is a block diagram illustrating a control structure of the nitrogen oxide processing apparatus of FIG.
3 is a cross-sectional view illustrating an injection nozzle of a first nozzle portion of the nitrogen oxide processing apparatus of FIG.
4 is a cross-sectional view showing another example of the injection nozzle of Fig.
FIGS. 5 and 6 are diagrams showing the operation of the nitrogen oxide processing apparatus of FIG. 1. FIG.
7 is a view conceptually showing a modification of the nitrogen oxide processing apparatus of a thermal power plant according to an embodiment of the present invention.
8 is a perspective view showing an arrangement structure of an NO x removal catalyst module of a nitrogen oxide processing apparatus according to another embodiment of the present invention.
FIG. 9 is a front view of the NOx removal catalyst module of FIG. 8. FIG.
10 is a plan view of the denitration catalyst module of FIG.
FIG. 11 is a perspective view showing the connection structure between the inner rail, the moving rail, and the outer rail shown together with the denitration catalyst module of FIG.
12 is a perspective view showing a modification of the connection structure of FIG.
FIG. 13 is a perspective view showing the denitration catalyst module of FIG. 8 and modifications thereof.
FIG. 14 is an operation diagram showing the storing process of the NOx removal catalyst module of FIG. 8. FIG.
FIG. 15 is an operational view showing the process of storing the denitration catalyst module according to one modification of FIG.
16 and 17 are use state diagrams of the denitration catalyst module of the nitrogen oxide processing apparatus according to another embodiment of the present invention.
FIGS. 18 and 19 are operation diagrams conceptually showing a nitrogen oxide processing apparatus for a thermal power plant according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and methods for achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is only defined by the claims. Like reference numerals refer to like elements throughout the specification.

Moreover, although the embodiments described herein are described separately from each other, it is not necessary to understand that one necessarily excludes the other. That is, the description of each embodiment can be cross-referenced to the extent that they do not contradict each other, and the configurations of the embodiments can be mutually applied within a mutually contradictory manner.

Hereinafter, a nitrogen oxide treatment apparatus for a thermal power plant according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 6. FIG.

1 is a view conceptually showing an apparatus for treating nitrogen oxides in a thermal power plant according to an embodiment of the present invention.

Referring to FIG. 1, a nitrogen oxide processing apparatus 1 (hereinafter referred to as a nitrogen oxide processing apparatus) of a thermal power plant according to the present invention includes at least two different And includes a nozzle portion (first nozzle portion 10 and second nozzle portion 20). Also included is a denitration catalyst module 50 disposed in the transfer passage (B) for treating nitrogen oxides by catalysis. The first nozzle unit 10 and the second nozzle unit 20 each include a vaporizer 40 and a vaporizer 40 capable of vaporizing the liquid reducing agent. The first nozzle unit 10 and the second nozzle unit 20 respectively include a vaporizing liquid reducing agent and a vaporizing reducing agent at different positions . The non-vaporized liquid reducing agent can be supplied from the first nozzle unit 10 disposed at the rear end of the gas turbine A. The reducing agent mixed with the exhaust gas in the vaporizer 40 and the first mixed gas of the exhaust gas 1 nozzle unit 10 and the second nozzle unit 20 disposed between the nozzle unit 10 and the stack C, as shown in Fig. It is possible to more effectively operate the reducing agent in correspondence with the distribution of the flue gas and the change in the condition in the transfer passage (B) by using a structure in which the liquid and gaseous reducing agents are separately supplied from different positions.

In this case, the fluid discharged to the second nozzle unit 20 may be a gaseous reducing agent generated by the vaporizer 40, and the fluid discharged to the first nozzle unit 10 may be a liquid reducing agent . The gaseous reducing agent discharged to the second nozzle unit 20 spreads more widely into the flue gas passage so that the nitrogen oxide can be treated. Also, the liquid reducing agent discharged from the first nozzle unit 10 can treat nitrogen oxides intensively in a more limited space. At this time, since the first nozzle unit 10 is located closer to the gas turbine (see A in FIG. 1) than the second nozzle unit 20 and is located in a relatively high temperature region, the first nozzle unit 10 The liquid reducing agent to be discharged is mainly vaporized at the same time as discharging, and can treat nitrogen oxides.

In the present invention, the reducing agent can treat nitrogen oxide by itself, but it can treat nitrogen oxide more effectively together with the denitration catalyst module 50. Therefore, such a reducing agent is not limited to the treatment of nitrogen oxides by catalysis. In addition, the process and means that the nitrogen oxide reduction, the nitrogen oxide; a _{(NOx NO, NO 2, N} 2 O, N 2 O 3, N 2 O 4, N 2 O 5 , etc.) and nitrogen (N ₂₎ As well as reducing one nitrogen oxide (e.g., NO ₂ ) to another nitrogen oxide (such as NO). Such a reducing agent may be at least one selected from, for example, a non-nitrogen reducing agent or a nitrogen-based reducing agent.

The denitration catalyst is not limited as long as it can promote the reducing action of the reducing agent. That is, the denitration catalyst may be a variety of catalysts capable of promoting the reducing action not only with the nitrogen-based reducing agent but also with the non-nitrogenous reducing agent. Preferably, the denitration catalyst may be a catalyst for promoting the reducing action of the nitrogen-based reducing agent. The catalyst for promoting the reduction action of the nitrogen-based reducing agent may be, for example, a selective catalytic reduction catalyst (SCR). The SCR catalyst is not limited as long as it can promote the reducing action of the nitrogen-based reducing agent, and may be commercially available. A commercially available catalyst may be a vanadium-based catalyst or the like.

The non-lipid reducing agent may be at least one selected from, for example, ethanol, ethylene glycol, and glycerin. The non-nitrogen based reducing agent can treat nitrogen oxides in such a manner that the sulfur dioxide is reduced by treating the nitrogen dioxide which mainly causes the zinc oxide with reducing nitrogen oxide (nitrogen monoxide). At this time, the non-nitrogen based reducing agent can reduce the chrome, regardless of the catalytic action. The nitrogen-based reducing agent may be at least one selected from, for example, ammonia and urea. Such a nitrogen-based reducing agent can be treated by reducing nitrogen oxides to nitrogen (N ₂ ) mainly by the promoting action of the denitration catalyst. As a result, according to the present invention, it is possible to organically apply the treatment method according to the operation state of the thermal power plant and the condition of the exhaust gas according to the operation state of the thermal power plant, It is possible to effectively treat nitrogen oxides.

In this embodiment, the non-reducing agent and the nitrogen-based reducing agent are applied as the reducing agent, and the denitration catalyst module 50 promotes the reducing action of only the nitrogen-based reducing agent. An example of the denitration catalyst of the denitration catalyst module 50 may be the above-mentioned SCR catalyst. The non-nitrogen based reducing agent describes an example in which nitrogen oxide is reduced without resorting to the catalytic action. Hereinafter, in the examples, the term "reducing agent" may be referred to as a non-nitrogen reducing agent, and the nitrogen-based reducing agent may be specifically referred to as a "nitrogen-based reducing agent". In this embodiment, the second nozzle 20 is located between the first nozzle 10 and the catalyst, and preferably the nitrogen-based reducing agent can be discharged to the second nozzle 20. As a result, the nitrogen-based reducing agent spreads evenly over the catalyst, and the catalyst-promoting action can be smoothly performed. Hereinafter, a specific example of the present invention will be described in such an embodiment. However, since this is an embodiment, the technical idea of the present invention is not limited thereto.

Also, in the present invention, the vaporizer 40 will be described mainly with reference to a configuration in which the flue gas in the transfer passage B flows into the vaporizer 40 and is mixed with the reducing agent and vaporized, as in this embodiment. That is, the vaporizer 40 has a structure in which the high-temperature flue gas flows through a channel connected to the moving passage B, and the reducing agent is vaporized through the heat of the flue gas. However, the present invention is not limited thereto. For example, it is possible to vaporize the reducing agent by using another heat source such as steam. This will be described with reference to a modification (Fig. 7) of an embodiment of the present invention.

Specifically, a nitrogen oxide processing apparatus 1 according to an embodiment of the present invention is a nitrogen oxide processing apparatus 1 according to an embodiment of the present invention. The nitrogen oxide processing apparatus 1 includes a gas turbine A disposed in the exhaust gas moving passage B between the gas turbine A and the stack C, A second nozzle unit 20 disposed between the first nozzle unit 10 and the stack C; at least one nozzle unit 10 disposed between the first nozzle unit 10 and the stack C; A reducing agent tank 30 in which a reducing agent for reducing nitrogen oxides in the exhaust gas in the transfer passage B is stored in a liquid phase, a denitration catalyst module 50 connected to the reducing agent tank 30 and the first nozzle portion 10, A first pipe line 101 for supplying the reducing agent to the first nozzle unit 10, a second pipe line 102 connected between the reducing agent tank 30 and the second nozzle unit 20, And a vaporizer (40) installed on the piping line (102) to vaporize the reducing agent and supply it to the second nozzle part (20). The nitrogen oxide processing apparatus 1 further includes a third piping line 103 branched from the second piping line 102 and connected to the moving path B according to an embodiment of the present invention, Is disposed at a branch point between the second piping line 102 and the third piping line 103 so that the reducing agent can be mixed with the flue gas introduced through the third piping line 103 and vaporized.

5) may be a non-zeolite reducing agent, and the nitrogen oxide processing apparatus 1 may include a nitrogen-based reducing agent (F3 in Fig. 6) as the former stage of the denitration catalyst module 50, (See FIG. 1). The denitrification action by the catalytic action of the denitration catalyst module 50 (that is, the treatment by the nitrogen reduction of the nitrogen oxide) can proceed smoothly by the nitrogen-based reducing agent supplied from the supply unit 60. As described above, the non-nitrogen based reducing agent may be at least one selected from ethanol, ethylene glycol, and glycerin, and the nitrogen-based reducing agent may be at least one selected from ammonia and urea.

Particularly, the nitrogen oxide treatment apparatus 1 according to an embodiment of the present invention can treat nitrogen oxide (NO) as a cause of yellow gas among the nitrogen oxides in the exhaust gas through the treatment with the reducing agent (see F1 in FIG. 5) ₂ ) is rapidly reduced to nitrogen monoxide (NO), it is possible to cope with the generation of yellow iron oxide such as nitrogen dioxide and the like at the initial stage of starting very effectively. Further, through the catalytic treatment of the denitration catalyst module 50 with the nitrogen-based reducing agent (see F3 in FIG. 6), various nitrogen oxides, which are not limited to specific nitrogen oxides in the exhaust gas, By reducing nitrogen (N ₂ ), the nitrogen oxides in the exhaust gas can be treated as environmentally harmful substances. Hereinafter, the configuration, operation and effect of the nitrogen oxide processing apparatus 1 according to one embodiment of the present invention will be described in detail with reference to the drawings.

The nitrogen oxide treatment apparatus 1 may be applied to a thermal power plant, and more preferably, it may be applied to a combined thermal power plant. As shown in FIG. 1, the nitrogen oxide processing apparatus 1 can be installed utilizing the exhaust gas moving passage B between the gas turbine A of the power plant and the stack C. The moving passage (B) may have an arrangement recovery boiler system in which superheater bundles (D1 to D5) are disposed therein. Although not shown, the upper and lower ends of the respective superheater bundles D1 to D5 may be connected to each other, and a tank for storing and circulating high pressure steam or heat recovery fluid may be installed at the connection site. The superheater bundles D1 to D5 sequentially circulate the fluid from the downstream end D5 to the upstream end D1 to generate high-pressure steam or the like. The temperature of the superheater bundles D1 to D5 can be lowered in order from the front end D1 toward the rear end D5.

The moving passage B includes an expanded tube portion B2 which is connected to the side of the stack C and has a relatively wide width and an axial tube portion B1 which is contracted from the expanded portion B2 and connected to the gas turbine A side The first nozzle portion 10 may be located within the shaft portion B1 and the second nozzle portion 20 may be located within the bulge portion B2. More specifically, the moving passage B includes an expanded portion B2 which is connected to the side of the stack C and has a relatively wide width, an axial tube portion 23 which is reduced from the expanded portion B2 and connected to the gas turbine A side B1 and a plurality of superheater bundles D1 to D5 arranged in the tube portion B2 as described above and the first nozzle portion 10 is located in the axial tube portion B1 and the second nozzle portion 20 may be located between the superheater bundles D1-D5. The axial pipe portion B1 is a pipe including a relatively narrow portion directly connected to the gas turbine A, and the flow velocity of the exhaust gas is relatively fast and the temperature can be kept highest in the moving passage B. Accordingly, the liquid phase reducing agent can be injected into the first nozzle unit 10 disposed in the axial pipe portion B1 to be vaporized and reacted effectively with the nitrogen oxides in the exhaust gas. In other words, since the liquid reducing agent can be directly injected, the nitrogen oxide such as nitrogen dioxide contained in the exhaust gas can be treated more effectively by using the reducing agent even at the initial point of time when the exhaust gas is generated, such as when the gas turbine A is started.

The axial tubular portion B1 means the entire tubular portion connected between the gas turbine A and the expanded tubular portion B2 as shown in the drawing and includes a portion gradually decreasing in width from the gas turbine A side from the expanded tubular portion B2, The portion held at reduced width and connected to the gas turbine A, and the like. The first nozzle unit 10 may be installed at a position immediately behind the gas turbine A as shown in FIG. 1, but may be disposed at another position in the shaft tube unit B1 as required. For example, the first nozzle unit 10 can be changed and arranged with a portion where the width of the upstream end directly before the expansion portion B2 changes. By adjusting the position of the first nozzle unit 10 to an appropriate point in the shaft section B1 in this way, the nitrogen oxide treatment effect can be improved.

 Further, the second nozzle unit 20 disposed in the expanded portion B2 can spray the first mixed gas of the reducing agent vaporized in advance and the exhaust gas mixed in advance with the exhaust gas in the moving passage B to increase the mixing ratio and increase the throughput . That is, the reducing agent can be more effectively applied to the whole exhaust gas flowing out of the moving passage B by discharging the gaseous reducing agent that has been vaporized together with the exhaust gas into the moving passage B. As described above, the second nozzle unit 20 is disposed between the superheater bundles D1 to D5 which serve as a heat accumulating function in the tube-expanding unit B2, and can discharge the vaporized reducing agent and the first mixed gas of the exhaust gas, It is possible to uniformly mix and mix the whole flue gas having a reduced flow rate in the tube portion B2. As described above, the first nozzle unit 10 is provided with a liquid reducing agent to treat nitrogen oxides such as nitrogen dioxide in the exhaust gas more quickly, and the second nozzle unit 20 supplies the first mixed gas of the vaporized reducing agent and the exhaust gas Thereby greatly increasing the throughput of the exhaust gas to the total nitrogen oxide. This ensures both the speed and efficiency of the flue-gas treatment.

Also, the denitration catalyst module 50 may also be disposed in the expansion portion B2. The denitration catalyst module 50 may be disposed, for example, at the rear end of the second nozzle portion 20, and the position may be adjusted as necessary. The denitration catalyst module 50 may include a plurality of the denitration catalyst modules 50, and the denitration catalyst modules 50 may be filled with the denitration catalyst. The denitration catalyst is a catalyst capable of promoting the reducing action of the nitrogen-based reducing agent, and may be an SCR catalyst as in the above-described example. Each of the denitration catalyst modules 50 may include a structure such as a housing for accommodating the catalyst. The denitration catalyst does not need to be limited as long as it passes through the exhaust gas and is capable of denitrification. The denitration catalyst module 50 can be easily introduced into and out of the moving passage B through the characteristic entrance and exit structure and the supporting structure and can be disposed in the moving passage B. Specific structural features relating to the denitration catalyst module 50 are described in further detail in another embodiment of the present invention.

The supply unit 60 supplies the nitrogen-based reducing agent to the front end of the NO x removal catalyst module 50. The nitrogen-based reducing agent can reduce the nitrogen oxides in the exhaust gas by the catalytic action of the NO x removal catalyst module 50. That is, the nitrogen-based reducing agent (see F3 in Fig. 6) may promote the action of reducing the nitrogen oxide by the catalytic action. Particularly, the supply unit 60 can supply the nitrogen-based reducing agent to treat the nitrogen oxide when the temperature inside the moving passage B is equal to or higher than the set temperature. The set temperature may be, for example, the catalyst front-end temperature or the rear-end temperature at a time point at which the post-operation load reaches a certain level and the flue gas flow rate becomes relatively constant, not at or after the starting point of the thermal power plant. The set temperature may be, for example, 230 占 폚 or higher, and preferably 300 to 400 占 폚. The catalytic action is activated in the corresponding temperature range, while the activity is decreased when the temperature is lower than or equal to the temperature range, so that the denitrification effect by the denitration catalyst may be insufficient. When the set temperature is reached, a nitrogen-based reducing agent (see F3 in FIG. 6) is supplied to the supply unit 60 and the NOx removal catalyst module 50 is replaced with the reducing agent (see F1 in FIG. 5) Can catalyze the treatment of nitrogen oxides.

The supply unit 60 may supply the nitrogen-based reducing agent to the upstream side of the NO x removal catalyst module 50 with a nozzle provided separately. However, as in the present embodiment, at least one of the first nozzle unit 10 and the second nozzle unit 20 The nitrogen-based reducing agent can be supplied to the upstream side of the NO x removal catalyst module 50. This makes it economical to design. The second nozzle unit 20 can be disposed between the first nozzle unit 10 and the NO x removal catalyst module 50 and supplies the nitrogen-based reducing agent to the second nozzle unit 20, So that the promoting action by the catalyst can smoothly proceed. In particular, in the present embodiment, description will be made on the basis of a structure in which a liquid nitrogen-based reducing agent is vaporized through the vaporizer 40 and supplied to the second nozzle unit 20. Thus, in the second nozzle unit 20, in addition to the vaporized reducing agent and the first mixed gas of the exhaust gas as described above (see F2 in FIG. 5), the vaporized nitrogen-based reducing agent and the second mixed gas of the exhaust gas F4) can also be discharged. The first mixed gas and the second mixed gas may be selectively discharged from the second nozzle unit 20. For example, the first mixed gas may be first discharged from the second nozzle unit 20 and the treatment using the reducing agent may be performed When the set temperature is reached, the second mixed gas is discharged from the second nozzle unit 20 and the treatment by the catalytic action of the denitration catalyst module 50 can proceed. As described above, the treatment efficiency of the nitrogen oxide can be maintained at a high level through such an organic treatment. This will be described later in more detail.

For example, the first nozzle unit 10 can inject the reducing agent by using an atomizing nozzle that receives a liquid reducing agent and injects the reducing agent together with the pressurized air. For this purpose, A supply line (not shown) connected to a compressor or a compressor, and the like. The second nozzle unit 20 may also include a supply line (not shown) connected to the compressor or the compressor when jetting the jet using the air nozzle. In FIG. 1, this structure is omitted.

The nitrogen oxide processing apparatus 1 includes the first nozzle unit 10 and the second nozzle unit 20, the reducing agent tank 30, and the vaporizer 40. The structure for supplying the liquid reducing agent directly from the reducing agent tank 30 to the first nozzle unit 10 or supplying it to the vaporizer 40 and vaporizing it and supplying it to the second nozzle unit 20, And includes piping lines (first piping line 101, second piping line 102, and third piping line 103). The reducing agent tank 30 may be formed independently as shown in FIG. 1, but it is not limited thereto, and it is possible to dispose one or more reducing agent tanks 30 as necessary. This will be described in further detail with reference to another embodiment of the present invention.

The reducing agent tank 30 stores a reducing agent for reducing the nitrogen oxides in the exhaust gas in the moving passage B. The reducing agent stored in the reducing agent tank 30 may be, for example, a hydroxyl (OH) Group, an aldehyde group, or a hydrocarbon containing at least one of a ketone group, an oxygen-containing hydrocarbon, and a carbohydrate. Also, the reducing agent stored in the reducing agent tank 30 may be in a liquid state. More preferred examples of the reducing agent may be at least one selected from the group consisting of ethanol, ethylene glycol, and glycerin, and may be liquid. Such a reducing agent does not contain a nitrogen component and may be a non-nitrogen reducing agent. Since it does not contain a nitrogen component, it may have a low possibility of reacting with oxygen in the air to form nitrogen oxides. The liquid reducing agent may be supplied directly to the first nozzle unit 10 through the first piping line 101 or may be vaporized via the vaporizer 40 through the second piping line 102, 20). With such a non-nitrogen reducing agent, it is possible to effectively reduce the sulfur dioxide by reducing nitrogen dioxide which causes the yellowing with nitrogen oxide.

The first piping line 101 is connected between the reducing agent tank 30 and the first nozzle unit 10 to supply a reducing agent to the first nozzle unit 10. The second piping line 102 is connected between the reducing agent tank 30 and the second nozzle unit 20. The third piping line 103 is branched at the second piping line 102 and connected to the moving path B and the vaporizer 40 is connected to the branching point of the second piping line 102 and the third piping line 103 . That is, the carburetor 40 may be formed to be connected to both the second piping line 102 and the third piping line 103 at the intersection where the second piping line 102 and the third piping line 103 intersect with each other have. The vaporizer 40 flows the exhaust gas through the third piping line 103 connected to the moving passage B and the liquid reducing agent through the second piping line 102 connected to the reducing agent tank 30 The reducing agent may be mixed with the exhaust gas to be vaporized, and then supplied to the second nozzle unit 20. For example, the vaporizer 40 may have a structure such as a tank having a space capable of containing and mixing a fluid therein, and may include a structure capable of heat exchange by introducing a heating device or an external heat source It is possible.

The first piping line 101 and the second piping line 102 may share a part of the piping connected to the reducing agent tank 30. That is, each of the pipelines constituting the first piping line 101, the second piping line 102, and the third piping line 103 may be arranged in the form as shown in FIG. For example, the first piping line 101 and the second piping line 102 may share the first piping 110 connected to the reducing agent tank 30. The first piping line 101 may be formed of a first piping 110 and a second piping 120 and may be connected to the first nozzle unit 10. The second piping line 102 may be connected to the first piping 110, The third piping 130 (including the third piping branch 131), and the fourth piping 140 to be connected to the second nozzle unit 20. The third piping line 103 is connected to the fifth piping 150 and the sixth piping 160 connected to the moving path B and the seventh piping 170 and is branched from the second piping line 102, Structure can be formed. The vaporizer 40 is connected to the third pipe 130 and the fourth pipe 140 forming the second pipe line 102 and the fifth pipe 150 making up the third pipe line 103, And may be formed so as to be supplied with a reducing agent and to be mixed and vaporized. In this manner, a pipe structure constituting the first pipe line 101, the second pipe line 102, and the third pipe line 103 can be formed.

In addition, the supply unit 60 may include a fourth pipe line 601 for supplying the nitrogen-based reducing agent. Specifically, the supply unit 60 may include at least one of the storage tank 602, the first nozzle unit 10, and the second nozzle unit 20 in which the nitrogen-based reducing agent is stored in at least one state selected from a liquid phase or a vapor phase, (603) for controlling the supply amount of the nitrogen-based reducing agent, which is controlled in accordance with the temperature of the moving passage (B) and supplied through the fourth pipe line (601), and a fourth pipe line ).

In this case, the liquid phase means a state in which the nitrogen-based reducing agent is dissolved in the liquid medium (e.g., water) and / or dispersed regardless of the state of the liquid itself or in the state of the liquid itself. For example, the liquid phase means containing an aqueous phase. Specific examples of liquid ammonia and liquid phase elements include ammonia water and urea water, respectively. The gaseous phase may also include a state in which the nitrogen-based reducing agent is dispersed and / or mixed in a gaseous medium (e.g., air, nitrogen, helium, argon, etc.) It means.

The nitrogen-based reducing agent stored in the liquid storage state in the storage tank 602 flows into the vaporizer 40 through the fourth piping line 601 and is vaporized by the exhaust gas flowing through the third piping line 103, 2 nozzle unit 20 as shown in FIG. That is, the nitrogen-based reducing agent may be stored as a liquid in the storage tank 602 and may be vaporized and supplied through the vaporizer 40 as in the present embodiment. However, as described above, since the nitrogen-based reducing agent can be stored in the storage tank 602 in one or more states selected from a liquid phase or a vapor phase, the technical idea of the present invention is not limited to this embodiment. For example, the supply unit 60 may store and immediately supply the nitrogen-based reducing agent in the vapor phase in the storage tank 602. The nitrogen-based reducing agent can be supplied to the upstream side of the denitration catalyst module 50 in an appropriate manner as required.

1, the second piping line 102 and the fourth piping line 601 may share a portion of the piping connected to the second nozzle unit 20, and the fourth piping line 601 may share a portion of the piping connected to the second nozzle unit 20, And may be branched from the second piping line 102 and connected to the storage tank 602 between the reboiler tank 40 and the reducing agent tank 30. That is, the fourth pipe line 601 may be formed by the fourth pipe 140, the third pipe branch pipe 131, and the eighth pipe 180 and may be connected to the second nozzle unit 20, The fourth piping 140 and the third piping branch pipe 131 (which means the portion between the eighth piping 180 and the carburetor 40 as part of the third piping 130) ). Whereby the supply section 60 including the fourth pipe line 601 as shown in FIG. 1 can be disposed.

On each pipeline structure, there can be provided a pump for causing a pressure difference to move the fluid, and valves for controlling the fluid flow amount in the pipeline. A first control valve 81 capable of controlling the flow rate of a reducing agent flowing through each of the first pipe 110, the second pipe 120 and the third pipe 130, A second control valve 82, and a third control valve 83, respectively. The first pipe 110 connected to the reducing agent tank 30 may be provided with a supply pump 71 for supplying a reducing agent. The fifth pipe 150 may be provided with a blower 72 for circulating the exhaust gas toward the carburetor 40. The sixth pipe 160 and the seventh pipe 170 may be connected to the exhaust pipe A first inlet valve 84 and a second inlet valve 85 may be installed to control the inflow amount of the exhaust gas or open and close the conduit to introduce the exhaust gas into any one of the sixth pipe 160 and the seventh pipe 170 have. A supply pump 604 for supplying the nitrogen-based reducing agent stored in the storage tank 602 and a control valve 603 for controlling the supply amount of the nitrogen-based reducing agent are connected to the eighth pipe 180 connected to the storage tank 602 Can be installed. The supply amount of the reducing agent, the inflow amount of the exhaust gas, the supply amount of the nitrogen type reducing agent, and the like are controlled using the arrangement of the pump and the valve, and the fluid discharged to the first nozzle unit 10 and the second nozzle unit 20 The second mixed gas of the reducing agent mixed with the exhaust gas in the vaporizer 40 and the exhaust gas mixed with the exhaust gas in the vaporizer 40 and the vaporized nitrogen-based reducing agent and the exhaust gas] .

2 is a block diagram illustrating a control structure of the nitrogen oxide processing apparatus of FIG.

The apparatus for treating nitrogen oxides according to an embodiment of the present invention may include a control unit 90 for performing a control operation with a control structure as shown in FIG. The control unit 90 can control the operation of the nitrogen oxide processing apparatus based on various variables including the state of the gas turbine, the distribution of the exhaust gas components in the moving passage and the stack, the temperature in the moving passage, have. Further, it is possible to control the supply unit (refer to 60 in Fig. 1) to operate to supply the nitrogen-based reducing agent when the temperature is equal to or higher than the set temperature. The supply unit 60 may be controlled using a separate control device and a temperature sensor, but it can be integrally controlled using the control unit 91 as in the present embodiment. This can also provide economical design. For example, the control unit 90 may include a first signal S1 indicative of the operating state of the gas turbine, a second signal S2 indicative of the components of the flue gas within at least one of the moving passages and the stack, And a third signal S3 indicative of a temperature inside at least one of the stack and the stack, and outputs a control signal S 'to the first nozzle unit 10, And the second nozzle unit 20 can be controlled.

In this case, the first signal S1 may be a signal transmitted from the cabin of the gas turbine, and the second signal S2 and the third signal S3 may be a sensor part (91 in Fig. 1) Lt; / RTI > The sensor unit 91 includes a measurement sensor for measuring the concentration of nitrogen dioxide in the exhaust gas, a concentration of carbon monoxide, a concentration of nitrogen oxide, or other components, and a temperature sensor for measuring the temperature of the combustion furnace, . The set temperature for supplying the nitrogen-based reducing agent in the supply unit 60 can also be measured from a temperature sensor or the like of the sensor unit 91. [ However, it is not always necessary to provide the temperature sensor as described above, and a separate temperature sensor may be installed in the moving passage to control the supply unit 60 accordingly.

The first signal S1 is a signal indicative of the operating state of the gas turbine in accordance with the operation mode change of the gas turbine. The first signal S1 is a signal indicating the ignition timing of the gas turbine, the number of ignited burners, the set load of the gas turbine, A situation where the operation mode of the gas turbine is changed, a frequency of the gas turbine drive, and the like may be monitored to indicate different signals. By directly inputting the change in the operating state of the gas turbine in real time through the first signal S1, it is possible to change the operating state of the gas turbine without depending on the component change or temperature change of the exhaust gas, B), the generation and change of the flue gas in the flue gas can be anticipated and actively coped with. It is also possible to directly input the change in the actual component of the exhaust gas in the passage B and the temperature change through the second signal S2 or the third signal S3 to confirm the situation, (Corresponding to the second signal S2 and the third signal S3) and the predicted value (corresponding to the first signal S1), it is possible to treat the nitrogen oxide in the exhaust gas more quickly and efficiently.

In addition, when the gas turbine is started, exhaust gas is generated immediately with ignition, and nitrogen oxides such as nitrogen dioxide may be discharged. However, since it takes time to vaporize and supply the reducing agent to the vaporizer (see 40 in FIG. 1) The nozzle unit (see 20 in FIG. 1) and the first nozzle unit (see 10 in FIG. 1) are disposed together, and the non-vaporized liquid reducing agent is directly sprayed to the first nozzle unit 10, . This makes it possible to more effectively reduce nitrogen oxides (particularly, nitrogen dioxide, which is a cause of chrome) generated during the initial operation. Further, as described above, by using the first signal S1, the second signal S2 and the third signal S3 in a complementary manner, the amount of the reducing agent injected is set to the corresponding optimum amount, and the nitrogen in the exhaust gas The oxide can be removed. Such a control may be very effective since a reducing agent may also remain as an impurity in the flue gas passage if it is supplied in an excessive amount and may generate another pollutant or generate new pollutants.

The control unit 90 can continuously monitor the temperature change in the moving passage B from the temperature sensor or the like of the sensor unit 91. When the temperature in the moving passage B becomes equal to or higher than the set temperature described above, 60 can be controlled to supply a nitrogen-based reducing agent to the front end of the denitration catalyst module (see 50 in FIG. 1) and treat the nitrogen oxides by the catalytic action of the denitration catalyst module 50. That is, as described above, when starting, the liquid reducing agent is directly supplied to the first nozzle unit 10 to quickly respond to the first nozzle unit 10, and the reducing agent and the first mixed gas of the exhaust gas are supplied to the second nozzle unit 20 And the temperature is raised to reach the set temperature or higher, the nitrogen-based reducing agent vaporized by the second nozzle unit 20 and the nitrogen-based reducing agent vaporized by the second nozzle unit 20 are mixed with the nitrogen- The NOx can be continuously treated with the catalytic action of the denitration catalyst module 50 by supplying the second mixed gas. Considering the operating condition of the thermal power plant and the flue gas condition, the nitrogen oxide can be treated by different treatment methods. Through this, it is possible to process nitrogen oxide from the start to the end of operation The treatment efficiency of the nitrogen oxide can be continuously maintained.

2, the control unit 90 controls each of the above-described piping lines (the first piping line (see 101 in FIG. 1), the second piping line (see 102 in FIG. 2), the third piping line 103) and a fourth piping line (see 601 in Fig. 1)), and controls the operation by transmitting a control signal S 'to a valve or the like. The control unit 90 receives the status signal S including at least one of the first signal S1, the second signal S2 and the third signal S3 described above and outputs a corresponding control signal The first control valve 81, the second control valve 82, the third control valve 83, the blower 72, the first inlet valve 84, 2 inlet valve 85 and the like. That is, the supply pump 71 may be operated to supply the reducing agent to the first piping line 101 and the second piping line 102. At this time, the first control valve 81, the second control valve 82, 3 control valve 83 to control the supply amount of the reducing agent and the flow rate at each point appropriately. It is also possible to operate the blower 72 to flow the flue gas into the vaporizer (see 40 in FIG. 1), control the first inlet valve 84 and the second inlet valve 85 to change the amount of the incoming flue gas, It is possible to control the flow of flue gas from only one side. Through this control, the liquid reducing agent is rapidly discharged through the first nozzle unit 10, and the reducing agent mixed with the exhaust gas through the second nozzle unit 20 and the first mixed gas of the exhaust gas are discharged It can be adjusted appropriately according to circumstances. Further, the discharge amount of the fluid discharged to each nozzle portion can be more accurately adjusted based on the signals (the first signal S1, the second signal S2, and the third signal S3), and if necessary, The fluid may be discharged only to one of the first nozzle unit 10 and the second nozzle unit 20.

The control unit 90 controls the supply pump 604 and the control valve 603 of the fourth piping line 601 in accordance with the temperature value of the second signal S2 and the like so that the second nozzle unit 20) to be mixed with the exhaust gas and the second mixed gas of the exhaust gas and the exhaust gas can be adjusted to be discharged. At this time, the generation of the first mixed gas can be stopped by controlling the pumps and valves of the piping lines other than the fourth piping line 601 together, and the first nozzle unit 10 can maintain or stop the operation. For example, when the nitrogen-based reducing agent is supplied to the fourth piping line 601 by controlling the control valve 603, the third control valve 83 and the like of the second piping line 102 are controlled together, The supply of the reducing agent through the line 102 can be stopped. So that the second mixed gas can be controlled to be discharged through the second nozzle unit 20 instead of the first mixed gas. In addition, the first control valve 81 can be controlled to adjust the liquid state reducing agent so that the liquid reducing agent is not discharged or discharged to the first nozzle unit 10. In this way, more effective processing suitable for the situation is possible through the control using the control unit 90.

FIG. 3 is a cross-sectional view illustrating an injection nozzle of the first nozzle unit of the nitrogen oxide processing apparatus of FIG. 1, and FIG. 4 is a cross-sectional view of another example of the injection nozzle of FIG. In each example of the drawings, a cross-sectional view is provided on the left side, and a cross-sectional view is shown on the right side.

Meanwhile, the first nozzle portion (see 10 in Fig. 1) at the rear end of the gas turbine may include an injection nozzle 11 having a structure as shown in Figs. 3 (a) and 3 (b). The first nozzle unit 10 includes a reducing agent flow path 11a for flowing the reducing agent F1 and an adiabatic flow path 11c formed by surrounding the reducing agent flow path 11a by flowing the adiabatic fluid H, And at least one injection nozzle 11 having a reducing agent flow path 11a and a fluid discharge port 11d communicating with the pressurized gas flow path 11b is disposed at the distal end of the pressurized gas flow path 11b, have. The pressurized gas flow path 11b may be disposed between the reducing agent flow path 11a and the heat insulating flow path 11c and the pressurized gas flow path 11b may be disposed around the outer peripheral portion of the reducing agent flow path 11a, . The adiabatic fluid (H) may be to prevent evaporation of the reducing agent. In the first nozzle unit 10, for example, as shown in the drawing, a reducing agent flow path 11a is disposed at the center, and a pressurized gas flow path 11b and a heat insulating flow path 11c are sequentially disposed around the reducing agent flow path 11a . As a result, the flow paths can have a concentric structure.

Although not shown, the first nozzle unit 10 may include a compressor and a supply line connected to the compressor, and may be supplied with the pressurized gas G through the nozzle. The adiabatic fluid H may be, for example, air or water, and the pressurized gas G may be, for example, compressed air. The adiabatic fluid (H) may be a liquid or a gas. Such a compressor can be utilized when the adiabatic fluid H is formed of a gas as described later. If the adiabatic fluid (H) is a liquid, a circulating pump or the like may be further connected and used. The injection nozzle 11 can prevent the external heat from being blocked by locating and protecting the liquid reducing agent inside the multiple flow path structure, thus effectively solving the problem that the liquid reducing agent evaporates inside the nozzle. That is, since the exhaust gas at the rear end of the gas turbine is relatively high in temperature, problems such as evaporation of the reducing agent in the nozzle due to the heat of the exhaust gas by using the nozzle structure can be solved smoothly.

The injection nozzle 11 may be formed in such a structure that the end of the heat insulating passage 11c opens to the vicinity of the fluid discharge opening 11d as shown in FIG. 3 (a) 11c and the heat insulating fluid H may be circulated through one side and the other side. The adiabatic fluid H may be formed as a gas or a liquid, and when the adiabatic fluid H is a gas, the structure as shown in FIG. 3 (a) may be more effective. That is, a gas such as air can be used as the adiabatic fluid H, and it can be effectively insulated so that external heat can not reach the inside by continuously passing the gas through the heat-insulating flow path 11c. When the adiabatic fluid H is formed of a liquid such as water, a flow path for introducing and discharging the adiabatic fluid H is formed at one side and the other side of the adiabatic channel 11c as shown in Fig. 3 (b) (H) is circulated to the inside of the heat insulating flow path 11c and then discharged. By forming the injection nozzles 11 in various forms and providing them in the first nozzle unit 10, problems such as evaporation of the reducing agent inside the nozzles due to the high temperature of the exhaust gas can be solved very effectively.

Meanwhile, the arrangement and configuration of the injection nozzles 11 can be variously modified as shown in FIG. For example, as shown in Fig. 4A, the reducing agent passage 11a may be disposed around the outer peripheral portion of the pressurized gas passage 11b. That is, the flow paths are formed in a concentric structure, a pressurized gas flow path 11b is disposed at the center, a reductant flow path 11a is disposed around the pressurized gas flow path 11b, and an adiabatic flow path 11c is formed in a manner surrounding the reductant flow path 11a can do. 4 (b) and 4 (c), the flow paths may be formed in a shape other than a concentric structure. In this case, for example, the pressurized gas flow path 11b, as shown in FIG. 4 (b) And the adiabatic flow path 11c can also surround the pressurized gas flow path 11b. That is, the adiabatic passage 11c is not limited to a specific form, but the space inside the injection nozzle 11 is widely used to form the reducing agent passage 11a and the adiabatic passage 11c which surrounds the entirety of the pressurized gas passage 11b ) Can be formed. 4 (c), the pressurized gas flow path 11b may be separated from the reductant flow path 11a so as to form an additional heat insulating flow path 11c 'surrounding the pressurized gas flow path 11b. have. That is, by using the space inside the injection nozzle 11, the adiabatic passage 11c and the additional adiabatic passage 11c 'surrounding the outer circumferential portion of the reducing agent passage 11a and the pressurized gas passage 11b, respectively, . At this time, a structure for allowing the adiabatic fluid H to flow in and circulate may be formed in the adiabatic channel 11c and the additional adiabatic channel 11c '. However, this is only an example and need not be limited to this. Thus, the nozzle structure in which the reducing agent F1, the pressurized gas G and the adiabatic fluid H flow inside can be formed and the external heat can be blocked by using the adiabatic fluid H in the nozzle. Thus, problems such as evaporation of a liquid reducing agent or the like in the nozzle can be solved very effectively.

FIGS. 5 and 6 are diagrams showing the operation of the nitrogen oxide processing apparatus of FIG. 1. FIG.

The nitrogen oxide processing apparatus 1 according to one embodiment of the present invention can be operated as shown in FIGS. 5 and 6. FIG. First, the operation can be performed as shown in FIG. 5 until the temperature in the moving passage B reaches the set temperature from the starting point of the gas turbine A. The pumps and valves of the respective piping lines can be adjusted by the control of the control unit as described above so that the liquid reducing agent F1 is discharged to the first nozzle unit 10 and the reducing agent F1 is discharged to the second nozzle unit 20, The reducing agent F1 mixed with the exhaust gas E and the vaporized first mixed gas F2 of the exhaust gas E can be discharged from the reaction chamber 40. The liquid reducing agent supplied from the reducing agent tank 30 is directly supplied to the first nozzle unit 10 along the first piping line 101 and discharged in the form of a liquid, And then discharged to the first mixed gas F2 mixed with the exhaust gas E introduced into the vaporizer 40 through the third piping line 103. In this case, The liquid reducing agent F1 discharged to the first nozzle unit 10 is vaporized immediately by the high temperature of the gas turbine A and mixed with the exhaust gas E in the moving passage B to thereby remove the nitrogen dioxide Nitrogen oxides can be treated more quickly. The first mixed gas F2 discharged to the second nozzle unit 20 is sprayed more widely in the moving path B and mixed with the exhaust gas E to thereby more effectively treat the nitrogen oxide in the exhaust gas E . The reducing agent and nitrogen dioxide (NO ₂₎ the causative agent of (F1) chrome yellow (yellow gas), especially flue gas of the nitrogen oxides through a process by the may be rapidly reduced to nitrogen monoxide (NO), this nitrogen dioxide or the like activated early by It is possible to cope with the generation of chrome which is generated by the untreated process.

Thereafter, when the temperature in the moving passage B reaches or exceeds the set temperature, it can be operated as shown in Fig. The nitrogen-based reducing agent F3 vaporized by the second nozzle unit 20 and the second mixed gas F4 of the exhaust gas E are discharged and the catalytic action of the denitration catalyst module 50 is performed Nitrogen oxides can be treated. It is possible to supply the nitrogen-based reducing agent F3 to the vaporizer 40 by controlling the supply pump 604 and the control valve 603 of the fourth piping line 601 by the control unit or the like, Based reducing agent (F3) can be vaporized by the exhaust gas (E). The NOx is supplied to the upstream side of the denitration catalyst module 50 in the moving passage B in the form of a second mixed gas F4 together with the exhaust gas E and the NOx is continuously treated by the catalytic action of the denitration catalyst module 50 . At this time, as described above, it is possible to stop the generation of the first mixed gas by controlling the pumps and the valves of the piping lines other than the fourth piping line 601 together. Further, the first nozzle unit 10 can be controlled to either keep or stop the operation. For example, when the nitrogen-based reducing agent F3 is supplied to the fourth pipe line 601 by controlling the control valve 603, the third control valve 83 and the like of the second pipe line 102 are controlled together, The supply of the reducing agent through the two-pipe line 102 can be stopped. The second mixed gas may be discharged through the second nozzle unit 20 instead of the first mixed gas. In addition, the second control valve 82 may be controlled to appropriately adjust the liquid reducing agent so that the liquid reducing agent is not discharged or discharged to the first nozzle unit 10. Through the catalytic action of the denitration catalyst module 50, various nitrogen oxides, not limited to specific nitrogen oxides in the exhaust gas, can be reduced to nitrogen (N ₂ ) by catalysis, So that the oxides can be treated as environmentally harmful substances.

At this time, the control unit controls the exhaust gas E in at least one of the first signal (refer to S1 in FIG. 2) indicating the operation state of the gas turbine A, the moving passage B, and the stack C, At least one of a second signal (refer to S2 in Fig. 2) indicating a component of the moving path B and a third signal (refer to S3 in Fig. 2) indicating a temperature inside at least one of the moving path B and the stack C (See S in Fig. 2) containing one of them, and can control the apparatus very actively corresponding thereto. That is, the operating conditions of the gas turbine A, the changes in the internal exhaust gas E such as the moving passage B and the stack C, the internal temperature changes of the moving passage B and the stack C, It is possible to very effectively treat nitrogen oxides such as nitrogen dioxide in the exhaust gas (E) by injecting an appropriate amount of reducing agent at a more appropriate time as a factor to control the apparatus in a comprehensive manner.

5 and 6, the nitrogen oxide processing apparatus 1 is configured so as to be capable of appropriately changing the treatment mode of the exhaust gas E in accordance with a change in important factors such as a temperature change in the moving passage (B) Depending on the situation, it is possible to treat nitrogen oxides very effectively by using a non-nitrifying reducing agent or organically applying different treatment methods using the nitrogen-based reducing agent and the denitration catalyst module 50, depending on the situation. In particular, through such processing, as described above, different treatment methods are applied organically from the starting time of the gas turbine (A) in which the operation is started to the middle of operation and the operation ending at a constant load, The treatment efficiency can be maintained at a high level continuously. Also, such a treatment can very effectively treat nitrogen oxides such as nitrogen dioxide even in the initial stage of operation, which is difficult to deal with conventionally, such as when the gas turbine is started, and can effectively treat nitrogen oxides generated during the initial operation. Thus, the nitrogen oxide treatment apparatus 1 according to one embodiment of the present invention can treat nitrogen oxides contained in the exhaust gas E very effectively.

7 is a view conceptually showing a modification of the nitrogen oxide processing apparatus of a thermal power plant according to an embodiment of the present invention.

On the other hand, as shown in Fig. 7, the nitrogen oxide processing apparatus 1a can be modified into another form in which the vaporizer 40 vaporizes the reducing agent without using the exhaust gas. That is, the nitrogen oxide processing apparatus 1a according to the modification is substantially the same as the embodiment described above, except that only the vaporization system of the vaporizer 40 is changed to another system. The vaporizer 40 may, for example, heat exchange with steam to vaporize the reducing agent. That is, the reducing agent may be vaporized in the vaporizing system using steam instead of the exhaust gas in the moving passage (B) and supplied to the moving passage (B). The vaporizer 40 may be supplied with steam from, for example, a separate boiler device or a boiler device installed in the power plant, and the steam thus supplied may be hotter than the temperature of the exhaust gas. Such high temperature steam may be more effective in vaporizing the liquid reducing agent in the reducing agent tank 30. In addition, when the supply portion 60 is formed to supply the nitrogen-based reducing agent to the upstream side of the denitration catalyst module 50, it may be particularly effective to vaporize the nitrogen-based reducing agent. For example, when anhydrous ammonia (ammonia gas) is pressurized and stored in a liquid state in the storage tank 602, it can be more effectively vaporized by the vaporizer 40 using high temperature steam and supplied to the upstream side of the NO x removal catalyst module 50.

An accumulator (not shown) may be provided between the carburetor 40 and the second nozzle unit 20 to adjust the pressure and supply the buffer. In addition, by connecting the blower 41 and the suction pipe 42 to the vaporizer 40 using the steam, the gas introduced through the suction pipe 42 is mixed to adjust the concentration and volume of the vaporized gas appropriately As shown in Fig. The suction pipe 42 is connected to the moving passage B to introduce the flue gas. However, the present invention is not limited to this, and it is also possible to form the suction pipe 42 to extend to the outside and suck the outside air directly to supply it to the carburetor 40 Do. In this way, the apparatus can be partially modified to constitute the nitrogen oxide processing apparatus 1a capable of effectively treating nitrogen oxides.

Hereinafter, a nitrogen oxide processing apparatus according to another embodiment of the present invention will be described in detail with reference to FIGS. Hereinafter, the description will be focused on the differences from the above-described embodiments so that the description will be concise and clear, and the description of the parts not mentioned separately will be replaced with the above description. 8 to 17, the internal superheater bundle and the like in the moving passage are omitted.

8 is a perspective view showing an arrangement structure of an NO x removal catalyst module according to another embodiment of the present invention, Fig. 9 is a front view of the NO x removal catalyst module of Fig. 8, Fig.

8 to 10, the nitrogen oxide processing apparatus according to another embodiment of the present invention is characterized by the structure relating to the disposition and entry / exit of the denitration catalyst module 50, and the other portions are substantially the same as those of the above- same. The nitrogen oxide treatment apparatus according to another embodiment of the present invention can easily mount and discharge a plurality of catalyst modules 50 from the outside to the inside or from the inside to the outside of the moving passage B, The movement passage B can be conveniently shielded and confidential. (The inside rail part 51, the outside rail part 53, and the moving rail part 54), which are arranged in the inside and outside of the moving path B and in the moving path B, The catalytic module 50 can easily be taken in and out of the passage B through the connecting and separating action and effectively kept airtight. In addition, the space between the catalyst modules 50 can be shielded very effectively by using a shield plate between the catalysts, and the distance between the catalyst modules 50 can also be adjusted.

The apparatus for treating nitrogen oxides according to another embodiment of the present invention is constructed as follows. The nitrogen oxide processing apparatus includes a first nozzle portion (refer to 10 in Fig. 1) disposed at the rear end of the gas turbine A in the flue gas passage B between the gas turbine (see Fig. 1A) and the stack C, (Refer to FIG. 1) disposed between the first nozzle unit 10 and the stack C, at least one denitrification (not shown) disposed between the first nozzle unit 10 and the stack C, A reducing agent tank (see 30 in FIG. 1) in which a reducing agent for reducing nitrogen oxides in the exhaust gas in the moving passage (B) is stored in a liquid phase, a reducing agent tank A first piping line (refer to 101 in Fig. 1) connected to the first nozzle unit 10 and connected to the second nozzle unit 20 to supply the reducing agent to the first nozzle unit 10, 1) 102, and a vaporizer (refer to 40 in FIG. 1) installed on the second piping line 102 to vaporize the reducing agent and supply it to the second nozzle part 20, An inner rail portion 51 disposed across the inside, An opening 52 formed at one side of the moving passage B facing the end of the inner rail portion 51 and an outer rail portion 52 disposed at the outside of the moving passage B and having an end facing the opening portion 52 And is connected to the opening 52 through the inner rail portion 51 and the outer rail portion 53 or is separated from at least one of the inner rail portion 51 and the outer rail portion 53, The denitration catalyst module 50 may be supported on the inner rail portion 51. The denitration catalyst module 50 may further include a moving rail portion 54 which is separated from the portion 51 and the outer rail portion 53. [

Particularly, in the denitration catalyst module 50, the moving rail portion 54 is connected to the inner rail portion 51, the inner rail portion 51, and the outer rail portion 53 in a state where the moving rail portion 54 passes through the opening portion 52 between the inner rail portion 51 and the outer rail portion 53, The moving rail B, the moving rail B, the moving rail B, the moving rail B, and the like. That is, it is possible to form a rail structure composed of the connection of the inner rail portion 51, the moving rail portion 52, and the outer rail portion 52, and to move the NO x removal catalyst module 50 on the rail structure. Hereinafter, another embodiment of the nitrogen oxide processing apparatus will be described in detail with reference to the drawings. As described above, repetitive description will be omitted and the remaining portions will be described intensively unless otherwise noted in the structures already described in the previous embodiments.

The moving passage B is substantially the same as the moving passage B of the above-described embodiment. 8 to 10, only a part thereof is shown as necessary. The transfer passage B may be a tubular structure as shown and may include a superheater bundle (see D1 to D5 in FIG. 1 - omitted in this drawing) for recovering the waste heat of the flue gas, have. The transfer passage (B) may be a portion where an arrangement recovery boiler system for recovering the waste heat of the flue gas is located. The passage B is not limited as long as the exhaust gas flows into the inside, and can be formed in various forms within such a limit.

The inner rail portion 51 is disposed across the inside of the moving passage B. The inner rail portion 51 can be disposed across the inside of the moving passage B as shown in Figs. The extending direction of the inner rail portion 51 may be a direction intersecting the flow direction of the flue gas toward the stack 3 (see E in Fig. 16). The inner rail part 51 serves not only as a traveling path for moving the denitration catalyst module 50 but also as a support for supporting the denitration catalyst module 50 in the moving path B. As shown in FIGS. 8 and 9, the inner rail part 51 may be stacked up and down with a predetermined distance therebetween. A plurality of the denitration catalyst modules 50 are accommodated in the inner rail part 51, The inner space can be filled with the denitration catalyst module 50. That is, a plurality of denitration catalyst modules 50 can be accommodated in a row along each inner rail part 51, and a plurality of denitration catalyst modules 50 housed in a line by stacking the inner rail parts 51 are stacked one above the other, Can be rearranged up and down. Whereby the inside of the moving passage (B) can be filled with the denitration catalyst module (50). The number of inner rail portions 51, the number of NO x removal catalyst modules 50 mounted on each inner rail portion 51, and the like are illustrative and need not be understood as limited. The size and shape of each denitration catalyst module 50, the size and shape of the inner rail portion 51, the size and shape of the inner rail portion 51, the size and shape of the inner rail portion 51, The arrangement of the modules 50 and the like can be appropriately changed.

An opening 52 is formed at one side of the moving passage B facing the end of the inner rail portion 51. As shown in Figs. 8 and 9, the opening 52 is a part formed by opening one side of the moving passage B, and serves to communicate the inside and the outside of the moving passage B. The opening 52 may be opened or closed by an airtight door 55 as shown and the airtight door 55 may include a moving rail 54 and optionally an inner rail 51, (53), and the opening (52) can be opened and closed. The shape of the opening 52 can be modified into various shapes as needed, and it is not necessary to limit the shape as shown in the drawings. It is possible to appropriately deform the opening 52 in various forms within a range in which the moving rail 54 to be described later can be received inside and the denitration catalyst module 50 can also be passed therethrough.

The outer rail portion 53 may be disposed outside the moving passage B and in parallel with the inner rail portion 51. As shown in Figs. 8 to 10, the outer rail portion 53 faces the opening portion 52 at its distal end, and can be disposed at a position corresponding to the inner rail portion 51 outside the travel passage B . Since the outer rail 53 can be formed by changing the length of the outer rail 53 to a relatively short or long length as required, it is not necessary to limit the outer rail 53 to a length or shape as shown. The outer rail portion 53 may have the same structure as the inner rail portion 51 (for example, a structure including a guide bar 510 and a guide roller 511, which will be described later, etc.) It may be changed. The later described moving rail 54 also has a structure including a guide bar 510 and a guide roller 511 having the same structure as at least one of the outer rail portion 53 and the inner rail portion 51 Etc.], but it can change the structure as needed. The shape and structure of the outer rail portion 53 can be changed appropriately so that the end faces the opening portion 52 and is disposed outside the travel passage B in parallel with the inner rail portion 51. [ As shown in the figure, a plurality of the outer rails 53 may be stacked in the vertical direction corresponding to the arrangement of the inner rails 51. [

The moving rail portion 54 serves to interconnect or separate the inner rail portion 51 and the outer rail portion 53 from each other. The moving rail portion 54 is connected through the opening portion 52 between the inner rail portion 51 and the outer rail portion 53 (see FIGS. 11 and 12), or the inner rail portion 51 and the outer rail portion 53 (53) and may be separated from the inner rail (51) and the outer rail (53). That is, the moving rail portion 54 is changed in position and the inner rail portion 51 and the outer rail portion 53 can be connected or disconnected. The moving rail 54 may be detachably attached to both the inner rail portion 51 and the outer rail portion 53 as shown in FIG. And the other end may be formed detachably from the other one of the inner rail portion 51 and the outer rail portion 53 (refer to FIG. 12). The moving rail portion 54 is connected to the inner rail portion 51 and the outer rail portion 53 through the opening 52 so as to penetrate one side of the moving passage B, And the like.

The airtight door portion 55 is interposed between the moving rail portion 54 and the inner rail portion 51 and the outer rail portion 53 selectively. That is, the airtight door portion 55 is selectively changed in position so as not to collide with the moving rail portion 54, and overlaps the opening portion 52 to seal the opening portion 52. The shape and structure of the airtight door portion 55 and the opening portion 52 can be appropriately changed and the airtight door portion 55 can be formed in such a shape that the opening portion 52 can be completely closed. The airtight door portion 55 can be more easily opened and closed by a fastening structure as shown in FIG. 8, more easily. One end of the airtight door portion 55 is coupled to one side of the opening portion 52 by a first hinge 551 and at least a portion of the airtight door portion 55 is pivoted to the other side of the opening portion 52 and overlapped with the other end portion of the airtight door portion 55 And a second hinge 552 is formed on the second hinge 552. One side of the second hinge 552 which overlaps with the hermetic seal portion 55 is provided with a screw 552 penetrating through the second hinge 552 and vertically coupled to the hermetic seal portion 55 A latch 553 may be formed. That is, the airtight door 55 includes a first hinge 551 for rotating the airtight door 55 itself and a second hinge 552 which is folded separately from the airtight door 55 on the opposite side of the first hinge 551 And the screw fastener 553 formed on the second hinge 552 is inserted into the hermetic seal part 55 in a vertical direction to firmly hold the fastened state. When the screw fixture 553 is rotated in the locking direction and inserted into the airtight door portion 55, both the first hinge 551 and the second hinge 552 are held in a fixed state (see the enlarged view of FIG. 7) When the clamp 553 is rotated in the unclamping direction to separate the airtight door 55 from the airtight door 55 and the second hinge 552 is tilted, the airtight door 55, like the airtight door 55 at the lower end of FIG. 8, 551, and can be conveniently opened.

The airtight door portion 55 and the moving rail portion 54 are selectively interposed between the inner rail portion 51 and the outer rail portion 53. When the airtight door portion 55 is rotated to be spaced apart from the inner rail portion 51 and the outer rail portion 53 and the opening portion 52 is opened as shown in the drawing, the inner rail portion 51 and the outer rail portion The moving rail part 54 can be interposed between the inner rail part 51 and the outer rail part 53. Conversely, when the moving rail part 54 is separated from the inner rail part 51 and the outer rail part 53, (55) rotates to overlap with the opening (52) and seal the opening (52). By selectively positioning the airtight door portion 55 and the moving rail portion 54 as described above, the rail structure capable of conveniently entering and exiting the denitration catalyst module 50 and the like inside and outside the moving passage B (A structure composed of a connecting member 51, a moving rail portion 54, and an outer rail portion 53). Also, when the movement of the denitration catalyst module 50 or the like is completed on the rail structure, the connection can be released (and also the connection body can be disassembled through it) and the communication passage B can be sealed very tightly.

The denitration catalyst module 50 is formed of a plurality of denitration catalyst modules 50 and is carried into or out of the moving passage B through the inner rail portion 51, the moving rail portion 54 and the outer rail portion 53. That is, as described above, a rail structure including the inner rail portion 51, the moving rail portion 54, and the outer rail portion 53 is formed to connect the inside and the outside of the moving passage B, The denitration catalyst module 50 can be moved or moved to enter or exit the denitration catalyst module 50. The denitration catalyst module 50 is firmly supported and fixed by the inner rail portion 51 inside the moving passage B as shown in Figs. 8 to 10, and is filled with the catalytic action by filling the inner space of the moving passage (B) Handle the flue gas. The shape and size of the denitration catalyst module 50 need not be limited as shown and can be appropriately modified corresponding to the size and shape of the entire moving path B. [ The denitration catalyst module 50 may be regenerated through a regeneration process or the like after being discharged outside the moving path B, or may be replaced with a new catalyst. Also, the denitration catalyst module 50 itself can be replaced with a new one, and other maintenance-related operations can be performed.

When the outer rails 53 and the like are stacked at different heights as described above, the NO x removal catalyst module 50 is moved to the outer rails 53 having different heights or the outer rails 53 A towing device (not shown), such as a hoist, may be used to move the denitration catalyst module 50 to the ground. Or an elevating device (not shown) connected to the outer rail 53 according to need may be used to conveniently move the denitration catalyst module 50 or the operator. In addition, the NO x removal catalyst module 50 and the like can be formed in a more convenient manner by utilizing various types of moving structures that can connect the outer rail 53 with the ground. A support structure (not shown) such as a support connected to the outer rail 53 may be provided to fix or support the outer rail 53 at different heights.

As shown in Figs. 8 to 10, the nitrogen oxide processing apparatus can include a structure that can shield the space between the denitration catalyst modules 50 very effectively. That is, the formation of gaps and gaps between the NO x removal catalyst modules 50 that can occur due to the movement of the NO x removal catalyst module 50 can be prevented by using various shielding structures to prevent leakage of the exhaust gas, The exhaust gas can be processed. As such a shielding structure, an inner shielding plate 56 between the denitration catalysts as shown in Figs. 8 to 10 may be included. As shown in the figure, at least one of the denitration catalyst inner shield plate 56 is formed in at least one of the denitration catalyst modules 50, and at least a part thereof is interposed in the space between the denitration catalyst modules 50 to block the movement of the exhaust gas, At least a portion of which may be elastically deformed to compress or elongate and to adjust the distance between the denitration catalyst modules 50. Further, it is possible to form a shielding structure including the outer shielding plate between the denitration catalysts (refer to FIG. 13 and FIG. 15 of FIG. 15), and the inner rail portion 51 between the denitration catalyst module 50 and the rail structure. (See Figs. 11, 12, 14, and 15) of the guide bar (see Figs. 11, 12, 14 and 15). In the case of the denitration catalyst inner shielding plate 56, a base portion (see 561 in Fig. 13) fixed to the denitration catalyst module 50 and a first inclined plate (See 562 of FIG. 13) and the second swash plate (see 563 of FIG. 13), a highly effective shielding effect can be exhibited.

Hereinafter, the rail connection structure, the structure of the denitration catalyst module, the exhaust gas shielding structure, and the entry / exit process of the denitration catalyst module will be described in detail with reference to FIGS. 11 to 15.

FIG. 11 is a perspective view illustrating a connection structure between the inner rail, the moving rail, and the outer rail shown together with the denitration catalyst module of FIG. 8, and FIG. 12 illustrates a modification of the connection structure of FIG. FIG. 13 is a perspective view showing the NOx removal catalyst module of FIG. 8 and modifications thereof. FIG.

The rail connection structure can be formed as shown in Fig. The movable rail portion 54 may be interposed between the inner rail portion 51 and the outer rail portion 53 as shown in Figure 11 (a) so as to be connected through the opening portion 52. When the moving rail 54 is connected as described above, the inner rail portion 51, the outer rail portion 53, and the moving rail portion 54 form a straight connection member to each other to form a rail connection structure . Therefore, the NOx removal catalyst module (see 50 in Figs. 13 to 15) is moved from the outside to the inside of the moving passage (see Figs. 8 to 10) or, conversely, from the inside of the moving passage And can be discharged to the outside. That is, in the denitration catalyst module 50, when the moving rail 54 is connected to the inner rail portion 51 and the outer rail portion 53 through the opening portion 52, the inner rail portion 51, The moving rail B, the moving rail B, the moving rail B, the moving rail B, the moving rail B, and the like. Particularly, the moving rail part 54 has an inner rail part 51 and an outer rail part 53 inside the moving path B in a state of passing through one side of the moving path B through the opening part 52 The connection structure of the rail connection structure (that is, the connection structure of the inner rail portion 51, the moving rail portion 54, and the outer rail portion 53) continuously connected without interruption between the inside and the outside of the moving passage B, So that the denitration catalyst module 50 and the like can be very easily taken in and out. In the absence of a connecting structure for connecting the inside and the outside of the moving passage B like the moving rail portion 54, at least a part of the rails may be disconnected to form a discontinuous section, It can be very difficult to move easily. This problem can be solved very effectively through the continuous rail connection structure including the moving rail 54.

The moving rail 54 is separated from at least one of the inner rail portion 51 and the outer rail portion 53 as shown in Figure 11 (b), and is separated from the inner rail portion 51 and the outer rail portion 53 Can be separated. That is, the moving rail portion 54 is discharged between the inner rail portion 51 and the outer rail portion 53 as needed, and can release the rail connection structure. When the moving rail 54 is released, the inner rail portion 51 and the outer rail portion 53 are separated from each other as shown in the drawing, and the moving rail portion 54 and the airtight door portion 55, 51 and the outer rail portion 53 and overlaps the opening portion 52 to seal the opening portion 52. [ Therefore, the entire moving passage (B) is also very effectively sealed. The moving rail 54 can be attached to and detached from both sides of the inner rail portion 51 and the outer rail portion 53 as shown in the figure so that the entire moving rail portion 54 is separated from the inner rail portion 51 and the outer rail portion 53 . In this case, for example, the end portions of the moving rail portion 54 and the end portions of the inner rail portion 51 and the corresponding outer rail portion 53 corresponding to the moving rail portion 54, A supporting structure capable of maintaining a state can be formed. If necessary, it may be detached using a coupling member such as a bolt and a nut, or may be attached or detached in such a manner that the end portion is fixed by welding or the like and disassembled again. The inner rail portion 51 and the outer rail portion 53 are connected to each other through the opening 52 and the inner rail portion 51 and the outer rail portion 53 are connected to each other, Can be formed.

Meanwhile, the connection structure including the moving rail 54 may be modified as shown in FIG. 12 (a) and 12 (b), one end of the moving rail portion 54 is foldably coupled to one of the inner rail portion 51 and the outer rail portion 53, May be formed separately from the other one of the inner rail portion (51) and the outer rail portion (53). For example, as shown in FIG. 12, the folding portion 541 of the moving rail 54 can be formed by using the hinge connection structure. For example, a double hinge structure or the like doubly joined to the end of the moving rail 54 and the end of the outer rail 53 may be applied to the moving rail portion 54 as shown in FIG. 12 (b) 54 may be folded to one side of the outer rail portion 53. [ However, as an example, the folded structure can be applied in various other ways. The meaning of folding is not limited to a structure that is necessarily folded about an axis, but includes various structures that overlap one another and vary in length. As an example, a structure in which the moving rail portion 54 is slidably folded on one of the outer rail portion 53 and the inner rail portion 51 is also possible. In such a case, a sliding movement path may be formed by a groove or the like between the moving rail portion 54 and another rail portion folded and folded. Thus, the movable rail 54 can be folded in various forms.

At least one of the inner rail portion 51, the outer rail portion 53 and the moving rail portion 54 is coupled between a pair of guide bars 510 and a guide bar 510 parallel to each other, And a plurality of guide rollers 511 that support the denitration catalyst module 50 in a rolling contact with a lower portion of the module (see 50 in FIGS. 13 to 15). The width between the guide bars 510 may be less than the width of the denitration catalyst module 50 and the guide rollers 511 connected between the guide bars 510 may smoothly support the denitration catalyst module 50, . The guide bar 510 and the guide roller 511 may be applied to the inner rail portion 51, the outer rail portion 53 and the moving rail portion 54 to make the rail connection structure uniform. However, At least some of them may be formed with different structures. It is also possible that the inner rail portion 51, the outer rail portion 53 and the moving rail portion 54 are deformed into a plate-like structure not including a roller or the like. For example, instead of the rollers, a plate or the like may be coupled between the guide bars 510 to form a structure capable of moving and supporting the NO x removal catalyst module 50. 13 (c), at least one of the denitration catalyst modules 50 includes a ball caster 50a rotatably installed at the lower portion thereof, so that friction between the denitration catalyst module 50 and the rail connection structure And can be configured to be easily moved. Also, the arrangement of the guide bars 510 is not necessarily limited to one pair, and a plurality of parallel guide bars 510 may be arranged side by side to form a rail structure. The plurality of guide bars 510 may be arranged in an even number or an odd number in such a manner that a plurality of pairs of the guide bars 510 are arranged in parallel to one another or another guide bars 510 are arranged in parallel between one pair The number is not particularly limited (not shown). It is also possible to adjust the arrangement of the guide bar 510 and the like in such a manner as necessary to form a more rigid rail structure.

 Referring to FIG. 13, the denitration catalyst module 50 may be shaped like a square block. As described above, the denitration catalyst module 50 may include an outer structure such as a housing in which a catalyst or the like can be accommodated. The denitration catalyst module 50 may be formed with an inner denudation plate 56 between the denitration catalysts as shown in FIG. 13 (a), and the denitration catalyst outer shield plate 57 as shown in FIG. 13 (b) It is possible. Also, at least one of the denitration catalyst modules 50 may include a ball caster 50a rotatably installed at a lower portion thereof according to the implementation state of the rail connection structure as described above. The inner shielding plate 56 between the denitration catalysts and the outer shielding plate 57 between the denitration catalysts may be appropriately deformed so as not to be structurally contradictory to each other and may be attached to the denitration catalyst module 50 as necessary. For example, the inside shielding plate 56 between the denitration catalysts and the outside shielding plate 57 between the denitration catalysts are attached to the single denitration catalyst module 50 in such a manner that the size, inclination, curvature, It is possible to install it anyway. Also, the lower ball caster 50a can be applied to the shield plate 50 as needed.

13 (a), the inner shield plate 56 between the denitration catalysts is formed on at least one of the denitration catalyst modules 50, and at least a part thereof is interposed in the space between the denitration catalyst modules 50, (See Figs. 16 and 17). At least a part of the denitration catalyst inner shielding plate 56 is elastically deformed to be compressed or elongated and the distance between the denitration catalyst modules 50 can be adjusted. The denitration catalyst inner shield plate 56 may be formed of a material capable of being elastically deformed, and may be changed in various shapes and structures favoring elastic deformation. For example, the denitration catalyst inner shielding plate 56 includes a base portion 561 fixed to the denitration catalyst module 50 as shown, and a base portion 561 extending outward from the base portion 561, At least a part of which is composed of at least two swash plates which are elastically deformable, so that the inclination angle? Between the swash plates can be changed and compressed or stretched. The swash plate is composed of a first swash plate 562 extending in one direction from the base portion 561 and having a relatively short length and a second swash plate 562 extending from the first swash plate 562 to the other and extending from the first swash plate 562 And a second swash plate 563 which is long. The first swash plate 562 and the second swash plate 563 are plate-shaped structures that are inclined and refracted to each other, and may be formed integrally with each other by a material having elasticity. The base portion 561 is connected to the inclined plate and may be formed in a planar shape to increase the contact area with the NO x removal catalyst module 50. The base portion 561, the first swash plate 562, and the second swash plate 563 may be integrally formed of, for example, a metal plate.

The second swash plate 563 extends longer than the first swash plate 562 and contacts the adjacent denitration catalyst module through the end portion to form a shielding structure. The first swash plate 562 is formed so as to be shorter than the second swash plate 563 so as to suppress the stiction and to transmit the elastic force to the second swash plate 563 more effectively. The second swash plate 563 is relatively long and can be more flexibly deformed about the point of refraction with the first swash plate 562 with a relatively large rotational force. That is, when a load is transmitted through the end of the second swash plate 563, the angle between the first swash plate 562 and the second swash plate 563 is changed due to the pressure applied to the second swash plate 563, 1, the elasticity is strengthened by the swash plate 562, so that excessive deformation can be restricted. By using the asymmetric structure of the first swash plate 562 and the second swash plate 563, it is possible to realize a plate-like shielding structure in which excessive deformation is suppressed while being more elastically deformed.

However, it is not necessary to understand the inside shielding plate 56 between the denitration catalysts so as to include the inclined plate. The denitration catalyst inner shielding plate 56 may be deformed into various forms at least a part of which is interposed in the space between the denitration catalyst modules 50 to exhibit a shielding effect. For example, at least a portion interposed between the denitration catalyst modules 50 may be formed into various shapes including planes, curved surfaces, and other unformed refracting surfaces and the like (not shown). When the outer shape and the like of the denitration catalyst module 50 are changed, the shape of the denitration catalyst module 50 may be appropriately modified so as to be more easily shielded. In this manner, the inner shielding plate 56 between the denitration catalysts can be formed in various forms to exhibit the shielding effect.

The outer shielding plate 57 between the denitration catalysts is formed on at least one of the denitration catalyst modules 50 as shown in FIG. 13 (b), and at least a part of the outer dense catalyst covers the outer space between the denitration catalyst modules 50 The flow of the exhaust gas can be blocked. The outer shielding plate 57 between the denitration catalysts may include a refractory plate 572 formed by refracting at least a part of the outer surface of the denitration catalyst module 50. The bending section 572 may be connected to and fixed to the base section 571 and the base section 571 may be integrally formed with the bending section 572. At least a part of the denitration catalyst outer shielding plate 57 (for example, the bending plate 572, etc.) may be elastically deformed. As shown in the drawing, the outer shielding plate 57 between the denitration catalysts can be formed on opposite sides of the denitration catalyst module 50, thereby further enhancing the flue gas shielding effect. It is also possible to form the inner shielding plate 56 between the denitration catalysts 50 on the opposite sides of the denitration catalyst module 50 as necessary. A highly effective shielding structure can be formed by using the outer shielding plate 57 and the inner shielding plate 56 between the denitration catalysts.

The outer surface of the denitration catalyst intervening plate 57 is also limited to the shape shown in FIG. The outer shielding plate 57 between the denitration catalysts can be deformed into various forms in which at least a part of the outer denudation catalysts 57 can cover the outside space between the denitration catalyst modules 50 and exhibit a shielding effect. In the drawing, the bending plate 572 is an example of an outwardly convex curved shape, but it is not limited to this example, and may be modified into various various forms at least partially refracted. For example, it may include an irregular refracting surface that is not limited to a curved surface, and may include a planar structure (not shown). In the case where the outer shape of the denitration catalyst module 50 is different from that of the denitration catalyst inner shielding plate 56, the outer shielding plate 57 also has a shape May be modified and applied. Thus, the outer shielding plate 57 between the denitration catalysts can be formed in various forms to exhibit the shielding effect.

A ball caster 50a as shown in FIG. 13 (c) may be formed under the NO x removal catalyst module 50. The ball caster 50a protrudes to the lower portion of the denitration catalyst module 50 and can rotate without any special fragrance. That is, by forming the ball caster 50a under the denitration catalyst module 50, the denitration catalyst module 50 can be moved very easily in various desired directions. Such a structure can be very easily used even when moving the ground or the like. As described above, in this embodiment, the guide rollers 511 are applied to the inner rail (see 51 in FIG. 11), the outer rail (see 53 in FIG. 11), the moving rail (see 54 in FIG. 11) , The ball caster 50a may be more useful when the rail connection structure is formed without such a roller structure. The structure to which the ball caster 50a is applied can also be formed together with the structure in which the inside shielding plate 56 and the outside shielding plate 57 between the denitration catalysts are applied.

FIG. 14 is an operational view showing the process of storing the denitration catalyst module in FIG. 8, and FIG. 15 is an operation diagram showing a process of storing the denitration catalyst module according to a modification of FIG. 14 and 15 (a) and 15 (b) respectively show a top plan view and a bottom plan view, respectively, so that the respective storing processes can be confirmed from different directions.

The denitration catalyst module 50 can be accommodated in a moving passage (see B in Figs. 8 to 10) as shown in Fig. 11 and 12) of the rail connection structure (that is, the rail structure composed of the connection of the inner rail portion 51, the moving rail portion 54, and the outer rail portion 53) The sliding movement of the catalyst module 50 can be accommodated in the moving passage B as shown in Fig. 14 (in this case, sliding movement refers to movement of different objects in contact with each other, Forming, contacting and moving. An inner rail portion 51 is disposed inside the moving passage B and a plurality of the denitration catalyst modules 50 may be accommodated in order along the inner rail portion 51. In particular, as shown in FIGS. 14A and 14B, the denitration catalyst module 50 is constructed using the structure of the denitration catalyst inner shield plate 56, which is at least partially interposed between the different denitration catalyst modules 50, It is possible to shield the space between them very effectively. As described above, the inner rail part 51 including the guide bar 510 and the guide roller 511 has at least a part of the guide bar 510 extended in the width direction to guide the guide rollers 511, (50). 14 (a) and 14 (b), the guide bar 510 of the inner rail part 51 is extended in the width direction (direction perpendicular to the longitudinal direction) (Not shown). For example, the width of the guide bar 510 may be greater than the diameter of the guide roller 511. In addition, it is also possible to increase the shielding effect by providing an additional blocking member or the like outside the guide bar 510 if necessary.

14 (b), even if the plurality of denitration catalyst modules 50 are continuously accommodated, the denitration catalyst module 50 does not come into direct contact with each other but is elastically contacted via the inner shield plate 56 between the denitration catalysts Very effective buffering is possible. That is, even if one of the denitration catalyst modules 50 moves toward the other and a load is transmitted, the impact caused by the denitration catalyst module 50 can be solved through the elastic deformation of the inner shield plate 56 between the denitration catalysts. As described above, when the angle between the first swash plate 562 and the second swash plate 563, which extend from the base portion 561 and are inclined with respect to each other, is changed, and the denitration catalyst module 50, which is elastically expanded and contracted, And the like can be solved very effectively. Therefore, even when the denitration catalyst module 50 is moved, it is possible to more effectively protect against unnecessary impacts, and it is possible to obtain an advantage that the accommodating is very convenient. The denitration catalyst module 50 is moved in a corresponding direction by the elastic force of the inner shield plate 56 between the denitration catalysts and the distance between the denitration catalyst modules 50 can be automatically adjusted. Can be formed very uniformly. Although not shown, it is also possible to arrange the inner shield plate 56 between the denitration catalysts 50 on the opposite sides of the denitration catalyst module 50 as described above.

15, when the outer shielding plate 57 is formed between the denitration catalysts 50, the space between the denitration catalyst modules 50 is widened to cover the space between the denitration catalyst modules 50, It is possible to obtain an advantage that the module 50 is formed in a closely attached structure. That is, as shown in FIGS. 15 (a) and 15 (b), the plurality of denitration catalyst modules 50 may be held in close contact with each other through the outer shield plate 57 between the denitration catalysts. The outer space between the NO x removal catalyst modules 50 is shielded by the outer NO x removal catalyst plate 57 even though the NO x removal catalyst module 50 is not completely in contact with the NO x removal catalyst module 50. 11 and 12) of the rail connection structure (that is, the connection structure of the inner rail portion 51, the moving rail portion 54, and the outer rail portion 53) Can be slid and moved and can be stored very easily inside the moving path B. As described above, since at least a part of the guide bar 510 of the inner rail portion 51 is extended in the width direction to effectively shield the space between the guide roller 511 and the denitration catalyst module 50, It is possible to prevent the flue gas from escaping into the gap between the flue gas outlet 50 and the flue gas. The denitration catalyst module 50 inside the moving passage B can also be very conveniently discharged to the outside of the moving passage B when the storing process is reversed with the rail connecting structure formed.

16 and 17 are use state diagrams of the denitration catalyst module of the nitrogen oxide processing apparatus according to another embodiment of the present invention.

Through this structure, the nitrogen oxide processing apparatus according to another embodiment of the present invention can treat nitrogen oxides by passing exhaust gas E through the denitration catalyst module 50 as shown in FIGS. 16 and 17. The denitration catalyst module 50 is accommodated in the above-described accommodating process and the inner rail portion 51 and the outer rail portion 53 are separated by separating the moving rail portion (refer to 54 in Figs. 8 to 10) The nitrogen oxides are transported by the catalytic action of the denitration catalyst module 50 in a state in which the opening 52 is sealed between the inner rail portion 51 and the outer rail portion 53 via the airtight door portion 55 It can be effectively processed as in the embodiment. Particularly, the exhaust gas E is not limited to the inter-catalyst shielding structure like the denitration catalyst inner shielding plate 56, but also between the denitration catalyst module 50 and the inner rail portion 51 by the expansion structure of the guide bar 510, The flow of the exhaust gas E passing through the denitration catalyst module 50 can be smoothly developed as shown in the drawing, Can be further improved. The exhaust gas E can be exhausted to the stack C after passing through the denitration catalyst module 50 and treated with nitrogen oxides. It is also possible to form a plurality of arrangements of the denitration catalyst modules 50 as shown in the drawings so that the exhaust gas E passes through the denitration catalyst module 50 more than once. In particular, the structure according to another embodiment of the present invention allows the denitration catalyst module 50 to freely enter and exit at any time through the above-described rail connection structure, and at the same time, the denitration catalyst module 50 It is possible to effectively treat nitrogen oxides by using the denitration catalyst module 50 with such a structure, and it is possible to efficiently perform the exchange and maintenance of the denitration catalyst module 50, Can be carried out very smoothly and conveniently.

Hereinafter, a nitrogen oxide processing apparatus according to another embodiment of the present invention will be described in detail with reference to FIGS. 18 and 19. FIG. Hereinafter, the description will be focused on the differences from the above-described embodiments so as to be concise and clear, and the description of the parts not mentioned separately will be replaced with the above description.

FIGS. 18 and 19 are operation diagrams conceptually showing a nitrogen oxide processing apparatus for a thermal power plant according to another embodiment of the present invention.

18 and 19, in the nitrogen oxide processing apparatus 1-2 according to another embodiment of the present invention, at least two reducing agent tanks 30 are disposed independently from each other, and the first piping line 101, And the second piping line (102) are independently connected to each of the reductant tanks (30) independent of each other. That is, as shown, at least two different reducing agent tanks 30 may be formed so that each reducing agent tank 30 is connected to each of the first and second piping lines 101 and 102 independently of each other . This makes it possible to more easily provide the liquid reducing agent F1 to the first nozzle unit 10 through the first piping line 101 and to supply the liquid reducing agent F1 may be supplied to the vaporizer 40 to be vaporized. It is also possible to extend this structure in such a manner that the number of the reducing agent tanks 30 can be additionally increased as needed, thereby correspondingly increasing the pipeline structure.

In this case, the first piping line 101 is composed of one independent piping connected to the reducing agent tank 30, and a supply pump 71 and a first control valve 81 are provided on the piping to control fluid flow have. The second piping line 102 also includes one independent piping connected to another reducing agent tank 30 (including branch piping such as the third piping branch piping 131 of the above-described embodiment) A supply pump 71 and a second control valve 82 may be provided to control fluid flow. The structure, operation and the like of the nitrogen oxide processing apparatus 1-2 such as the remaining channel structure are substantially the same as those described in the above-described embodiment, and thus a repetitive description thereof will be omitted.

That is, as shown in FIG. 18, the nitrogen oxide processing apparatus 1-2 according to another embodiment of the present invention also has a structure in which the liquid reducing agent F1 is discharged to the first nozzle unit 10, The second nozzle unit 20 discharges the vaporized reducing agent F1 and the first mixed gas F2 of the exhaust gas E to efficiently treat nitrogen oxides such as nitrogen dioxide in the exhaust gas E. The vaporizer 40 may be configured to introduce the exhaust gas E in the transfer passage B as shown to vaporize the reducing agent F1 but is not limited thereto and is not limited to the embodiment of FIG. It is needless to say that it is possible to vaporize by using high temperature steam. 19, when the temperature in the transfer passage B reaches or exceeds the set temperature, the nitrogen-based reducing agent F3 vaporized in the second nozzle portion 20 and the nitrogen-based reducing agent F3 in the exhaust gas E The second mixed gas F4 is discharged and the NOx can be continuously treated by the catalytic action of the denitration catalyst module 50. [ It is needless to say that it is possible to control according to circumstances so that the liquid reducing agent is not jetted or sprayed together with the first nozzle unit 10. As described above, by appropriately changing the treatment method of the exhaust gas (E), it is possible to use the non-nitrite reducing agent depending on the situation, or organically apply different treatment methods using the nitrogenous reducing agent and the denitration catalyst module 50, Can be effectively processed.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

1, 1a, 1-2: Nitrogen oxide treatment apparatus 10: First nozzle unit
11: injection nozzle 11a: reducing agent flow path
11b: Pressurized gas flow path 11c:
11c ': additional adiabatic channel 11d: fluid outlet
20: second nozzle unit 30: reducing agent tank
40: vaporizer 42: suction pipe
50: Denitration catalyst module
50a: ball caster 51: inner rail part
52: opening 55: air tightness fisher
53: outer rail part 54:
56: denitration catalyst inner shield plate 57: denitration catalyst outer shield plate
60: supply part 71, 604: supply pump
72, 41: blower 81: first control valve
82: second control valve 83: third control valve
84: first inlet valve 85: second inlet valve
90: control unit 91: sensor unit
101: first piping line 102: second piping line
103: third piping line 110: first piping
120: second piping 130: third piping
131: Third piping branch pipe 140: Fourth piping
150: fifth pipe 160: sixth pipe
170: seventh pipe 180: eighth pipe
510: guide bar 511: guide roller
541: Folding part 551: First hinge
552: second hinge 553: screw fastener
561, 571: base portion 562: first swash plate
563: second swash plate 572: oyster plate
601: fourth piping line 602: storage tank
603: Regulating valve
A: Gas turbine B: Travel passage
B1: shaft section B2: expansion section
C: Stoker D1 ~ D5: Superheater bundle
E: Flue gas F1: Reducing agent
F2: first mixed gas F3: nitrogen-based reducing agent
F4: second mixed gas G: pressurized gas
H: Insulating fluid S: Status signal
S1: first signal S2: second signal
S3: third signal S ': control signal
α: inclination angle

Claims (33)

A first nozzle portion disposed at a rear end of the gas turbine in an exhaust gas moving path between a gas turbine and a stack;
A second nozzle unit disposed between the first nozzle unit and the stack;
At least one denitration catalyst module disposed between the first nozzle portion and the stack;
A reducing agent tank in which a reducing agent for reducing nitrogen oxides of the exhaust gas in the moving passage is stored in a liquid phase;
A first pipe line connected between the reducing agent tank and the first nozzle unit to supply the reducing agent to the first nozzle unit;
A second pipe line connected between the reducing agent tank and the second nozzle unit; And
And a vaporizer installed on the second pipeline to vaporize the reducing agent and supply the vaporized second reducing agent to the second nozzle part,
Wherein the first nozzle unit comprises:
An adiabatic flow path for flowing the adiabatic fluid and surrounding the reductant flow path, and a pressurized gas flow path for flowing the pressurized gas, wherein the flow path of the fluid that communicates with the reductant flow path and the pressurized gas flow path, And at least one injection nozzle in which a discharge port is disposed. The method according to claim 1,
Further comprising a third piping line branching from said second piping line and connected to said moving path,
Wherein the vaporizer is disposed at a branch point between the second pipeline line and the third pipeline line and mixes the reducing agent with the flue gas introduced through the third pipeline line to be vaporized. The method according to claim 1,
Wherein the vaporizer vaporizes the reducing agent by heat exchange with steam. The method according to claim 1,
The reducing agent is a non-nitrogen based reducing agent,
Further comprising a supply unit for supplying a nitrogen-based reducing agent to a front end of the NO x removal catalyst module. 5. The method of claim 4,
Wherein the non-nitrogen based reducing agent is at least one selected from the group consisting of ethanol, ethylene glycol, and glycerin. 5. The method of claim 4,
Wherein the nitrogen-based reducing agent is at least one selected from ammonia and urea. 5. The method of claim 4,
Wherein the supply unit supplies the nitrogen-based reducing agent when the temperature inside the moving passage is equal to or higher than a set temperature. 5. The method of claim 4,
Wherein the supply unit includes:
A fourth pipe line connected between at least one of the first nozzle unit and the second nozzle unit and the storage tank, and a second pipe line connected between the first pipe unit and the second pipe unit, wherein the nitrogen-based reducing agent is stored in at least one state selected from a liquid phase or a vapor phase, And a regulating valve which is controlled according to the temperature of the nitrogen-containing reducing agent and regulates the supply amount of the nitrogen-based reducing agent supplied through the fourth pipe line. 9. The method of claim 8,
Wherein the nitrogen-based reducing agent stored in a liquid state in the storage tank flows into the vaporizer through the fourth piping line and is vaporized and supplied to the second nozzle unit. 9. The method of claim 8,
Wherein the second piping line and the fourth piping line share a portion of the piping connected to the second nozzle unit. 11. The method of claim 10,
And the fourth piping line is branched from the second piping line between the vaporizer and the reducing agent tank and connected to the storage tank. The method according to claim 1,
Wherein the first piping line and the second piping line share a portion of the piping connected to the reducing agent tank. The method according to claim 1,
Wherein at least two of the reducing agent tanks are arranged independently from each other,
Wherein the first pipeline line and the second pipeline line are independently connected to each of the reductant tanks independent of each other. The method according to claim 1,
Wherein the moving passage includes an expansion pipe portion connected to the stack side and having a relatively wide width, an axial pipe portion contracted from the expansion pipe portion and connected to the gas turbine side, and a plurality of superheater bundles disposed in the expansion pipe portion,
Wherein the first nozzle portion is located in the axial tube portion and the second nozzle portion is located between the superheater bundles. The method according to claim 1,
A first signal indicating an operating state of the gas turbine, a second signal indicating a component of the exhaust gas in at least one of the moving passage and the stack, and a second signal indicating a temperature inside at least one of the moving passage and the stack And a third signal indicating the first signal,
Further comprising a control unit for sending a control signal to control a fluid discharge amount of the first nozzle unit and the second nozzle unit. delete The method according to claim 1,
And the pressurized gas flow path is disposed between the reducing agent flow path and the heat insulating flow path. 18. The method of claim 17,
Wherein the pressurized gas flow path is disposed around the periphery of the reducing agent flow path. The method according to claim 1,
Wherein the reducing agent flow path is disposed around an outer periphery of the pressurized gas flow path. The method according to claim 1,
Wherein the pressurized gas flow path is spaced apart from the reducing agent flow path, and the heat insulating flow path also surrounds the pressurized gas flow path. The method according to claim 1,
Wherein the pressurized gas flow path is spaced apart from the reductant flow path and an additional heat insulating flow path surrounding the pressurized gas flow path is formed. The method according to claim 1,
An inner rail disposed across the interior of the travel passage,
An opening formed in one side of the moving passage facing the end of the inner rail,
An outer rail disposed outside the moving passage and having a distal end facing the opening,
Wherein the inner rail and the outer rail are connected to each other through the opening or between the inner rail and the outer rail and separated from at least one of the inner rail and the outer rail, Further comprising a rail portion,
Wherein the denitration catalyst module is supported on the inner rail. 23. The method of claim 22,
Wherein the denitration catalyst module moves on the inner rail, the moving rail, and the outer rail in a state where the moving rail is connected between the inner rail and the outer rail through the opening, An apparatus for treating nitrogen oxides in a thermal power plant entering or exiting a transfer passage. 23. The method of claim 22,
And an airtight door portion interposed between the moving rail and the inner rail and the outer rail to seal the opening. 25. The method of claim 24,
Wherein the airtight door portion has one end coupled to one side of the opening by a first hinge,
A second hinge is formed on the other side of the opening portion so as to be at least partially turned and overlapped with the other end of the airtight door portion,
And a threaded fastener that is vertically coupled to the airtight door portion through the second hinge is formed on one side of the second hinge that overlaps with the airtight door portion. 23. The method of claim 22,
Wherein at least one of the inner rail portion, the outer rail portion, and the moving rail portion includes a pair of guide bars parallel to each other, And a plurality of guide rollers for supporting the denitration catalyst module. 27. The method of claim 26,
Wherein the inner rail portion includes the guide bar and the guide roller, wherein at least a part of the guide bar extends in the width direction to shield a space between the guide roller and the NOx removal catalyst module. 23. The method of claim 22,
Wherein the moving rail part is foldably connected to one of the inner rail and the outer rail and the other end is detachable from the other of the inner rail and the outer rail, . 23. The method of claim 22,
Wherein the moving rail portion is detachable from both the inner rail portion and the outer rail portion. The method according to claim 1,
Wherein the denitration catalyst module comprises a plurality of denitration catalyst modules formed on at least one of the plurality of denitration catalyst modules and at least a part of the denitration catalyst module covers the outside of the space between the denitration catalyst modules to block the movement of the exhaust gas, Further comprising a nitrogen oxide treatment apparatus of a thermal power plant. The method according to claim 1,
The denitration catalyst module includes a plurality of denitration catalyst modules formed on at least one of the plurality of denitration catalyst modules and at least a part of which is interposed in a space between the denitration catalyst modules to block the movement of the exhaust gas, And a denitration catalyst interposed between the denitration catalyst module and the denitration catalyst module, the denitration catalyst interposed between the denitration catalyst module and the denitration catalyst module. A first nozzle portion disposed at a rear end of the gas turbine in an exhaust gas moving path between a gas turbine and a stack;
A second nozzle unit disposed between the first nozzle unit and the stack;
At least one denitration catalyst module disposed between the first nozzle portion and the stack;
A reducing agent tank in which a reducing agent for reducing nitrogen oxides of the exhaust gas in the moving passage is stored in a liquid phase;
A first pipe line connected between the reducing agent tank and the first nozzle unit to supply the reducing agent to the first nozzle unit;
A second pipe line connected between the reducing agent tank and the second nozzle unit; And
And a vaporizer installed on the second pipeline to vaporize the reducing agent and supply the vaporized second reducing agent to the second nozzle part,
The denitration catalyst module includes a plurality of denitration catalyst modules formed on at least one of the plurality of denitration catalyst modules and at least a part of which is interposed in a space between the denitration catalyst modules to block the movement of the exhaust gas, And a denitration catalyst interposed between the denitration catalyst modules, the denitration catalyst interposed between the denitration catalyst modules,
Wherein the inner shielding plate between the denitration catalysts includes a base fixed to the denitration catalyst module and at least two swash plates extending outwardly from the base and bent at an angle to each other and at least partially elastically deformable, An apparatus for treating nitrogen oxides in a thermal power plant in which the inclination angle between swash plates changes and is compressed or elongated. 33. The method of claim 32,
Wherein the swash plate includes a first swash plate extending in one direction from the base and having a relatively short length and a second swash plate extending from the first swash plate to the other and longer than the first swash plate, Nitrogen oxide treatment device.

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