JP4854652B2 - Operation method of denitration apparatus and denitration apparatus - Google Patents

Description

The present invention relates to an operation method of a denitration apparatus and a denitration apparatus, and a denitration catalyst comprising a plurality of layers that decomposes nitrogen oxides (NO _x ) contained in the exhaust gas by contacting a mixed gas obtained by mixing exhaust gas and reducing gas. It is useful when applied to the operation of a denitration apparatus having

Conventionally, in order to remove nitrogen oxides (NO _x ) from exhaust gas from boilers and combustion furnaces, ammonia gas (NH ₃ ) is injected into the exhaust gas, and the exhaust gas and ammonia gas (NH ₃ ) are mixed. A denitration apparatus is used in which the mixed gas is brought into contact with a denitration catalyst and decomposed into nitrogen gas and water vapor. In such a denitration apparatus, a denitration catalyst is provided so that the introduced exhaust gas can pass through sequentially, and ammonia gas (NH ₃ ) is injected according to the amount of exhaust gas introduced from the main body of a boiler, a combustion furnace, or the like. It has come to be.

  In the denitration apparatus as described above, various developments have been made for the purpose of improving the denitration performance and extending the life of the equipment. For example, the more the turbulent exhaust gas passing through the denitration catalyst, the higher the denitration rate. (Refer to patent document 1) Or, when exhaust gas is rectified in a denitration catalyst, the denitration rate is disclosed (see patent document 2). That is, in any denitration device, the denitration rate can be maintained high when the exhaust gas in contact with the denitration catalyst is turbulent, so the development of various types of denitration devices utilizing such characteristics is anxious. Has been.

However, since the denitration catalyst used in such a denitration apparatus is generally expensive, there is a problem that the operation cost becomes high when periodic replacement or the like is performed in order to maintain a certain denitration performance. was there. In addition, when trying to improve the denitration rate, there is a problem that the amount of ammonia gas (NH ₃ ) that affects the denitration rate fluctuates, which increases the running cost of the corresponding equipment itself. It was.

JP 2004-066228 A JP 2004-154622 A

  In view of such circumstances, an object of the present invention is to provide a denitration apparatus operating method and a denitration apparatus that can prolong the life of the denitration performance of the denitration catalyst easily and at low cost and can efficiently operate the entire apparatus. .

  In order to achieve the above object, a first aspect of the present invention provides a denitration catalyst comprising a plurality of layers for contacting a mixed gas obtained by mixing exhaust gas and reducing gas to decompose nitrogen oxides contained in the exhaust gas. Each denitration catalyst is a method of operating a denitration apparatus that treats exhaust gas that has passed through as a treatment gas, wherein a part of the gas extracted from the treatment gas treated in the denitration apparatus is disposed in the denitration apparatus The denitration apparatus operating method is characterized in that the denitration apparatus is introduced so as to be uniformly dispersed in the vicinity of the end of each denitration catalyst in a state in which turbulence has occurred.

  In the first aspect, a part of the gas extracted from the processing gas processed in the denitration apparatus is uniformly dispersed in the vicinity of the end of each denitration catalyst in a state where turbulence is generated between the denitration catalysts. To be introduced. Thereby, the rectified gas between each denitration catalyst can be made into a turbulent state.

  According to a second aspect of the present invention, the processing gas is introduced between the denitration catalysts as a turbulent flow having a predetermined ratio with respect to the total amount of exhaust gas passing through the denitration apparatus. The method of operating a denitration apparatus according to the first aspect.

  In the second aspect, turbulent flow having a predetermined ratio with respect to the total amount of exhaust gas passing through the denitration apparatus is introduced between the denitration catalysts. Thereby, the amount of gas required for the reaction process can be reliably introduced.

  The third aspect of the present invention has a denitration catalyst composed of a plurality of layers for contacting a mixed gas in which exhaust gas and reducing gas are mixed and decomposing nitrogen oxides contained in the exhaust gas. A denitration apparatus for processing as a processing gas, wherein a pipe for branching out from the discharge side of the processing gas processed in the denitration apparatus and extracting a part of the processing gas is arranged, and the processing gas is passed through the pipe. In this denitration apparatus, a turbulent flow passage for introducing a gas in which a certain turbulence has occurred is formed between the respective denitration catalysts arranged in the denitration apparatus.

  In the third aspect, each of the denitration catalysts disposed in the denitration device is extracted and treated through a pipe branched from the discharge side of the treatment gas treated in the denitration device. It is possible to form and introduce a gas with a certain turbulence in between. Thereby, the gas between each denitration catalyst can be made into a turbulent state.

  According to a fourth aspect of the present invention, the turbulent flow forming flow path is connected to the downstream side of the denitration apparatus main body and takes in a processing gas into the piping, and the upstream side of the denitration apparatus main body, A turbulent flow passage that is connected between the inlet and the inlet, and an inlet that introduces the processing gas that is connected and taken in from the inlet through the piping. And a turbulent flow forming member that forms a turbulent flow by contacting with the processing gas passing through the turbulent flow forming flow path, The denitration apparatus according to the third aspect is characterized in that the processing gas in contact with the turbulent flow forming member is introduced between the denitration catalysts in a turbulent state.

  In the fourth aspect, the processing gas that comes into contact with the turbulent flow forming member provided in the inflow direction of the turbulent flow forming channel is introduced between the denitration catalysts in a turbulent state. Thereby, the process gas which passes a turbulent flow formation flow path can be made into a turbulent flow state reliably, and the gas between each denitration catalyst can be disturbed.

  According to a fifth aspect of the present invention, in the turbulent flow forming flow path, a processing gas intake means for taking in a part of the processing gas processed in the denitration apparatus, and the processing gas taken in is diffused in the air. Turbulent flow generating means for generating turbulent flow, turbulent flow introducing means for introducing the generated turbulent flow into the denitration apparatus, and introducing a predetermined amount of turbulent flow generated in the turbulent flow forming channel into the denitration apparatus. A turbulent flow generator having flow rate control means for controlling the turbulent flow, and the turbulent flow generator generates a turbulent flow having a predetermined amount with respect to the total amount of exhaust gas passing through the denitration device. The denitration apparatus according to the third aspect is characterized in that the denitration apparatus is introduced into the denitration apparatus.

  In the fifth aspect, a turbulent flow consisting of a predetermined amount is generated by the turbulent flow generation device with respect to the total amount of exhaust gas passing through the denitration device and introduced into the denitration device. Thereby, it is possible to contribute to extending the life of the denitration catalyst while reliably introducing an amount of gas necessary for operating the denitration apparatus.

  According to a sixth aspect of the present invention, the flow rate control means adjusts the amount of processing gas taken from the processing gas taking means based on the detected total amount of exhaust gas passing through the denitration apparatus, and The denitration apparatus according to the fifth aspect, wherein the flow rate is adjusted so that the turbulent flow introduced from the flow introduction means into the denitration apparatus is uniformly dispersed in the vicinity of the end of each denitration catalyst. .

  In the sixth aspect, the amount of exhaust gas taken into the turbulent flow generation device is adjusted based on the total amount of exhaust gas passing through the denitration device, and the turbulent flow introduced into the denitration device again is the end of each denitration catalyst. The flow rate is adjusted so as to be uniformly distributed in the vicinity. Accordingly, the amount of gas necessary for operating the denitration apparatus can be reliably adjusted, so that, for example, the amount of ammonia gas injected as the reducing gas necessary for the reaction can be reduced or controlled.

  According to a seventh aspect of the present invention, the introduction port or the turbulent flow introducing means is provided at a plurality of locations corresponding to the space between the denitration catalysts, and the turbulent flow forming channel is the introduction port or the turbulent flow. The denitration apparatus according to any one of the fourth to sixth aspects, wherein the denitration apparatus is configured to branch between the denitration catalysts via the introducing means.

  In the seventh aspect, the turbulent flow path is configured to branch between the denitration catalysts. Thereby, the gas between each denitration catalyst can be disturbed reliably.

  According to the present invention, a part of the processing gas processed by the denitration apparatus is extracted, and only a predetermined amount is reintroduced between the denitration catalysts in a turbulent state so as to make a turbulent state between the denitration catalysts. Therefore, it is possible to provide a denitration apparatus operation method and a denitration apparatus that can prolong the life of the denitration performance of the denitration catalyst easily and at low cost and can efficiently operate the entire apparatus.

  Hereinafter, the best mode for carrying out the present invention will be described. The description of the present embodiment is an exemplification, and the present invention is not limited to the following description.

(Embodiment 1)
FIG. 1 is a schematic configuration diagram of a denitration apparatus according to the first embodiment. In the present embodiment, description will be made assuming a denitration apparatus provided in a thermal power plant or the like, but the present invention is not necessarily limited thereto.

  As shown in FIG. 1, a denitration apparatus 10 according to this embodiment includes an exhaust gas duct 12 connected to an upstream side of an apparatus main body 11 and communicating with a boiler device of a thermal power plant, and an apparatus main body 11 connected to a downstream side. And a processing gas duct 13 for exhausting the processing gas processed inside. And in the apparatus main body 11, the denitration catalyst 14A and 14B which consists of multiple layers with respect to the inflow direction of gas are arrange | positioned at predetermined intervals. In this embodiment, two layers of denitration catalysts 14A and 14B are arranged in parallel to each other.

Each of the denitration catalysts 14A and 14B is provided so that the exhaust gas introduced from the exhaust gas duct 12 sequentially passes, and reduces the nitrogen oxide (NO _x ) contained in the exhaust gas in contact with the passed exhaust gas. At this time, it is preferable that the interval between the catalyst layers be approximately the same as the space where the denitration catalysts 14A and 14B are not disposed.

Here, the type and shape of each of the denitration catalysts 14A and 14B are not particularly limited, but in general, TiO ₂ is used as the carrier and V ₂ O ₅ is used as the active component, and the honeycomb or plate type is used. There is. In the present embodiment, each of the denitration catalysts 14A and 14B is configured by using a honeycomb type (hereinafter referred to as a honeycomb type) and combining a plurality of columnar honeycomb type catalysts side by side.

  Further, a turbulent flow forming flow for introducing a part of the processing gas discharged from the processing gas duct 13 between each of the NOx removal catalysts 14A and 14B in the apparatus main body 11 is provided in the processing gas duct 13 on the discharge side of the denitration apparatus 10. A path 15 is provided. As will be described later, the turbulent flow forming flow path 15 is formed by arranging a pipe that branches from the process gas duct 13 and extracts a part of the process gas, and the process gas passes through the pipe, A gas having a certain turbulence is introduced between the denitration catalysts 14A and 14B disposed in the apparatus main body 11.

Then, according to the amount of exhaust gas from the boiler device with respect to the denitration device 10, ammonia gas (NH ₃ ) as a reducing gas is injected from the exhaust gas duct 12, thereby exhaust gas and ammonia gas (NH ₃ ) inside the device body 11. And are mixed. The mixed gas mixture comes into contact with each of the denitration catalysts 14A and 14B, thereby being decomposed into nitrogen gas and water vapor to become a processing gas from which nitrogen oxides (NO _x ) have been removed. A part of the processing gas thus processed is introduced into the apparatus main body 11, and other processing gases are discharged from the processing gas duct 13.

  Here, a configuration method of the above-described turbulent flow path 15 will be described with reference to FIG. FIG. 2 is a diagram illustrating a configuration example of a turbulent flow forming channel of the denitration apparatus according to the first embodiment.

  As shown in FIG. 2, the turbulent flow path 15 is first connected to the downstream side of the apparatus main body 11 and connected to the intake port 17 for taking the processing gas into the pipe 16 and the upstream side of the apparatus main body 11. Thus, an introduction port 18 is provided for introducing the processing gas taken in from the intake port 17 between the denitration catalysts 14A and 14B via the pipe 16. A turbulent flow forming member 19 that forms turbulent flow by coming into contact with the passing processing gas is provided inside the turbulent flow forming flow path 15 that connects between the intake port 17 and the inlet port 18. It is arranged so as to be perpendicular to the inflow direction of the forming flow path 15. Then, the processing gas taken in from the intake port 17 comes into contact with the turbulent flow forming member 19 to become a turbulent state, and is introduced between the denitration catalysts 14A and 14B while maintaining the turbulent state. Yes.

  Here, as the turbulent flow forming member 19 described above, in the example shown in FIG. 2A, a baffle plate 19a having a shape capable of appropriately disturbing the processing gas in contact therewith is installed. As the shape of the baffle plate 19a, for example, as shown in FIG. 3 (a) or FIG. 3 (b), a type having a large number of lattice-shaped holes 100 or a type having both the concavo-convex portions 101 and the holes 102, etc. Can be considered. Moreover, the turbulent flow forming member 19 may be provided, for example, so that only the central portion in the pipe line of the pipe 16 or the width of the turbulent flow forming member 19 is full, and is not particularly limited as long as a predetermined turbulent state can be formed.

  On the other hand, in the example shown in FIG. 2B, as the turbulent flow forming member 19, the processing gas passing through the pipe 16 is totally disturbed, and the disturbed state is maintained for a predetermined distance and time. A fan 19b having a capacity is installed. And the flow volume introduce | transduced into the apparatus main body 11 from the inlet 18 can be suppressed by providing the flow volume adjustment member 20 which interrupts | blocks a part in the pipe line before the inlet 18. FIG. As a result, only a necessary flow rate can be introduced. For example, the formed turbulent flow is prevented from being partially introduced by the airflow of the fan 19b, and the denitration catalysts 14A and 14B are arranged. It can be introduced with appropriate adjustments so as to spread throughout the entire space.

As described above, according to the denitration apparatus 10 of the present embodiment, the processing gas passes through the turbulent flow forming flow path 15 and contacts the turbulent flow forming member 19 to cause a certain turbulence in the apparatus main body 11. Therefore, a part of the gas extracted from the processing gas processed in the apparatus main body 11 is turbulent between the denitration catalysts 14A and 14B and the denitration catalysts 14A and 14B. It can introduce | transduce so that it may disperse | distribute uniformly near an edge part. For this reason, the gas passing through the inside of the apparatus main body 11 becomes a turbulent state, and the denitration catalysts 14A and 14B can be used efficiently and used without waste. Can be reduced. Since the performance of the denitration catalysts 14A and 14B is maintained for a long time compared to the conventional case, the amount of ammonia gas (NH ₃ ) injection required for the reaction can be reduced.

(Embodiment 2)
FIG. 4 is a schematic configuration diagram of a denitration apparatus according to the second embodiment. Also in the present embodiment, description will be made assuming a denitration apparatus provided in a thermal power plant or the like, but the present invention is not necessarily limited thereto.

  As shown in FIG. 4, the denitration apparatus 10A according to the present embodiment is connected to the upstream side of the apparatus main body 11A and communicates with the boiler apparatus of the thermal power plant, and connected to the downstream side to connect the apparatus main body 11A. And a processing gas duct 13 for exhausting the processing gas processed inside. And in the apparatus main body 11A, the denitration catalysts 14C-14E which consist of multiple layers are arrange | positioned by the predetermined space | interval with respect to the gas inflow direction. In the present embodiment, three layers of denitration catalysts 14C to 14E are arranged in parallel to each other.

  Further, a part of the processing gas discharged from the processing gas duct 13 is introduced into the processing gas duct 13 on the discharge side of the denitration apparatus 10A between the respective denitration catalysts 14C and 14D and between 14D and 14E in the apparatus main body 11A. For this purpose, a turbulent flow forming channel 15A is provided. This turbulent flow forming flow path 15A is composed of two flow paths consisting of a flow path extending between the denitration catalysts 14C and 14D and a flow path extending between the denitration catalysts 14D and 14E. Pipes that branch out from the gas duct 13 and extract a part of the processing gas are arranged in the respective flow paths, and the processing gas passes through the pipes, whereby the denitration catalysts 14C and 14D arranged in the apparatus main body 11A are disposed. And 14D and 14E are introduced with a gas having a certain turbulence.

Then, according to the amount of exhaust gas from the boiler apparatus for the denitration apparatus 10A, ammonia gas (NH ₃ ) as a reducing gas is injected from the exhaust gas duct 12, thereby exhaust gas and ammonia gas (NH ₃ ) inside the apparatus body 11A. And are mixed. Mixed gas mixture, by contacting the respective denitration catalyst 14C～14E, the process gas nitrogen oxide is decomposed into nitrogen gas and water vapor (NO _X) is removed. A part of the processing gas thus processed is introduced into the apparatus main body 11 </ b> A, and other processing gases are discharged from the processing gas duct 13. At this time, the amount of exhaust gas from the boiler device, that is, the total amount of exhaust gas passing through the denitration device 10A is detected by a flow sensor 22 described later.

  Here, a configuration method of the above-described turbulent flow forming channel 15A will be described with reference to FIG. FIG. 5 is a diagram illustrating a configuration example of a turbulent flow forming channel of the denitration apparatus according to the second embodiment.

  As shown in FIG. 5, in the turbulent flow forming channel 15A, the processing gas intake means 31 for taking in part of the processing gas processed in the apparatus main body 11A, and the turbulent flow by diffusing the taken processing gas in the air. Turbulent flow generating means 19A and 19B for generating a flow, turbulent flow introducing means 32 for introducing the generated turbulent flow into the apparatus main body 11A, and a predetermined amount of turbulent flow generated in the turbulent flow forming flow path 15A A turbulent flow generator 150 having flow rate control means 40 for controlling to be introduced into the main body 11A is provided.

  Among these, the processing gas intake means 31 includes an intake port 17 and an electromagnetic valve 21A that adjusts the flow rate based on a predetermined signal, and a process that is taken in from the intake port 17 by opening and closing operation of the electromagnetic valve 21A. The gas flow rate is adjusted. On the other hand, the turbulent flow introducing means 32 includes an introduction port 18 and an electromagnetic valve 21B that adjusts the flow rate based on a predetermined signal, and is introduced from the introduction port 18 into the apparatus main body 11A by opening / closing operation of the electromagnetic valve 21B. The turbulent flow is adjusted. Here, the turbulent flow introduction means 32 and the introduction ports 18 are provided at a plurality of locations corresponding to the space between the denitration catalysts 14C and 14D and between the 14D and 14E. Alternatively, the denitration catalysts 14C and 14D and 14D and 14E are branched through the introduction port 18, respectively. In the present embodiment, the turbulent flow forming flow path 15A extending from the processing gas intake means 31 to the turbulent flow introducing means 32 is branched into two systems, and the turbulent flow introducing means 32 and the two inlets 18 are provided. . In the present embodiment, the intake port 17 and the electromagnetic valve 21A are separately provided. However, the present invention is not particularly limited thereto, and for example, the intake port 17 and the electromagnetic valve 21A are integrated. It may be a thing. The same applies to the configuration of the inlet 18 and the electromagnetic valve 21B.

  In addition, the turbulent flow generation means 19A is configured such that, for example, a driving device that generates constant power is installed in the baffle plate 19a of the first embodiment described above, and unconditionally regardless of the state of the processing gas in the pipe. You may make it drive, and you may make it drive suitably according to the state of the process gas which passes the inside of a pipe line. On the other hand, the turbulent flow generation means 19B is provided with the fan 19b of the first embodiment described above, for example. At this time, the turbulent flow generating means 19A can be omitted if the turbulent flow state of the processing gas is maintained up to the inlet 18 extending between the denitration catalysts 14C and 14D. In the present embodiment, the turbulent flow generating means 19A and 19B may be separately provided in the ducts before branching to the respective inlets 18, but there is no particular limitation, and for example, the turbulent flow is maintained. Only one may be provided according to the force, or only one may be provided according to the performance of the turbulent flow generation means 19A or 19B.

  On the other hand, the flow rate control means 40 adjusts the amount of processing gas taken in from the processing gas taking-in means 31 based on the total amount of exhaust gas detected by the flow rate sensor 22 described later, and from the turbulent flow introducing means 32 to the apparatus body 11A. The flow rate is adjusted so that the turbulent flow introduced into the inside is uniformly dispersed in the vicinity of the ends of the denitration catalysts 14C to 14E. In this case, a flow rate sensor 22 may be provided in the exhaust gas duct 12 to detect the entire exhaust gas amount passing through the denitration apparatus 10A. In this way, the turbulent flow generator 150 generates a turbulent flow having a predetermined amount with respect to the total amount of exhaust gas passing through the denitration apparatus 10A and introduces it into the apparatus main body 11A.

  Here, a control system related to the above-described turbulent flow generator 150 will be described. FIG. 6 is a diagram illustrating a control system of the turbulent flow generation device according to the second embodiment.

  As shown in FIG. 6, when the flow rate sensor 22 installed in the denitration device 10 </ b> A detects the amount of exhaust gas from the boiler device, the result is notified to the flow rate control means 40. The flow rate control means 40 notifies the processing gas intake means 31 of a drive signal in order to adjust the amount of process gas taken into the turbulent flow generator 150 according to the amount of exhaust gas from the boiler device. The processing gas intake means 31 adjusts the opening of the electromagnetic valve 21 communicating with the intake port 17 based on the drive signal from the flow rate control means 40 so as to take in a predetermined amount of processing gas. In this way, in this embodiment, it is possible to reliably extract only the amount of processing gas necessary for the operation of the turbulent flow generation device 150 from the processing gas passing through the denitration device 10A and use it for extending the life of the denitration performance. it can.

  Then, the processing gas taken in from the intake port 17 passes through the turbulent flow generating means 19A or 19B to become a turbulent state and is discharged from each turbulent flow introducing means 32. At this time, the electromagnetic valve 21 constituting the turbulent flow introducing means 32 may be opened and closed according to the amount of exhaust gas from the boiler device, that is, the amount of exhaust gas passing through the denitration device 10A. That is, when there is a change in the amount of exhaust gas from the boiler device, the amount of turbulent processing gas introduced from each inlet 18 may be controlled based on the signal from the flow sensor 22. In this case, the flow rate control means 40 notifies each turbulent flow introduction means 32 of a predetermined drive signal so that the opening of each electromagnetic valve 21 is adjusted, and the amount of processing gas released from the introduction port 18 is reduced. Adjusted.

As described above, according to the denitration apparatus 10A of the present embodiment, the process gas passes through the turbulent flow generation device 150, thereby contacting the turbulent flow generation means 19A or 19B and causing a certain turbulence to adjust the flow rate. Then, it is introduced again into the apparatus main body 11A. Therefore, a part of the gas extracted from the processing gas processed in the apparatus main body 11A is turbulent between the denitration catalysts 14C and 14D and between 14D and 14E, and the denitration catalysts 14C to 14E. A turbulent flow having a predetermined ratio with respect to the total amount of exhaust gas passing through the denitration device 10A is introduced between the denitration catalysts 14C and 14D and between 14D and 14E. It is definitely introduced. As a result, the rectified gas between each of the denitration catalysts 14C and 14D and between 14D and 14E can be in a turbulent state, so that each of the denitration catalysts 14C to 14E can be used efficiently and used without waste. Therefore, the use time can be extended and the denitration rate of the denitration apparatus 10A can be improved. Further, by introducing the gas in a turbulent state while grasping the total amount of exhaust gas, the minimum gas necessary for the reaction processed in the denitration apparatus 10A can be reliably introduced, and ammonia gas (NH ₃ ) And the operation load of the facility is reduced without greatly changing the reaction of the exhaust gas, so that the running cost can be stabilized and useless facility investment can be suppressed.

1 is a schematic configuration diagram of a denitration apparatus according to Embodiment 1. FIG. It is a figure which shows the structural example of the turbulent flow formation flow path of the denitration apparatus which concerns on Embodiment 1. FIG. It is a figure explaining the turbulent flow formation member of the denitration apparatus which concerns on Embodiment 1. FIG. 3 is a schematic configuration diagram of a denitration apparatus according to Embodiment 2. FIG. It is a figure which shows the structural example of the turbulent flow formation flow path of the denitration apparatus which concerns on Embodiment 2. FIG. It is a figure which shows the control system of the turbulent flow generator which concerns on Embodiment 2. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10, 10A denitration apparatus 11, 11A apparatus main body 12 Exhaust gas duct 13 Process gas duct 14A-14E Denitration catalyst 15, 15A Turbulent flow path 16 Piping 17 Intake port 18 Inlet port 19 Turbulent flow formation member 19a Baffle plate 19b Fan 19A, 19B Turbulent flow generating means 20 Flow path adjusting member 21 Electromagnetic valve 22 Flow rate sensor 31 Process gas intake means 32 Turbulent flow introducing means 40 Flow rate controlling means 100 Hole portion 101 Concavity and convexity portion 102 Hole portion 150 Turbulent flow generating device

Claims (7)

  A denitration apparatus that has a denitration catalyst composed of a plurality of layers for contacting a mixed gas in which exhaust gas and reducing gas are mixed and decomposes nitrogen oxides contained in the exhaust gas, and treats the exhaust gas that has passed as a treatment gas. An operation method, wherein a part of the gas extracted from the processing gas processed in the denitration apparatus is turbulent between the denitration catalysts arranged in the denitration apparatus and the end of each denitration catalyst A method of operating a denitration apparatus, wherein the denitration apparatus is introduced so as to be uniformly dispersed in the vicinity of the section.   The operation of the denitration apparatus according to claim 1, wherein the processing gas is introduced between the denitration catalysts as a turbulent flow having a predetermined ratio with respect to the total amount of exhaust gas passing through the denitration apparatus. Method.   A denitration device that has a denitration catalyst consisting of multiple layers that decomposes nitrogen oxides contained in the exhaust gas by contacting a mixed gas that is a mixture of exhaust gas and reducing gas, and treats the exhaust gas that has passed as a treatment gas. In the denitration apparatus, a pipe branched from the discharge side of the treatment gas treated in the denitration apparatus and with a part of the treatment gas extracted is disposed, and the treatment gas is passed through the pipe for treatment. A denitration apparatus in which a turbulent flow passage for introducing a gas in which a certain turbulence has occurred is formed between the respective denitration catalysts disposed in the chamber.   The turbulent flow forming channel is connected to the downstream side of the denitration device main body and takes in the processing gas into the piping, and is connected to the upstream side of the denitration device main body and takes in from the intake port. Between the respective denitration catalysts through the pipe and between the intake port and the inlet port, and is perpendicular to the inflow direction of the turbulent flow path And a turbulent flow forming member that forms a turbulent flow by contacting with the processing gas passing through the turbulent flow forming flow path, and is in contact with the turbulent flow forming member. 4. The denitration apparatus according to claim 3, wherein gas is introduced between the denitration catalysts in a turbulent state.   In the turbulent flow forming channel, a processing gas intake means for taking in part of the processing gas processed in the denitration apparatus, and a turbulent flow generating means for diffusing the taken processing gas in the air to generate turbulent flow Turbulent flow introduction means for introducing the generated turbulent flow into the denitration apparatus, and flow rate control means for controlling the turbulent flow generated in the turbulent flow forming channel so as to introduce only a predetermined amount into the denitration apparatus. A turbulent flow generator having a predetermined amount of exhaust gas passing through the denitration device and introducing the turbulent flow into the denitration device. The denitration apparatus according to claim 3.   The flow rate control means adjusts the amount of processing gas taken in from the processing gas taking-in means based on the detected total amount of exhaust gas that passes through the denitrating equipment, and from the turbulent flow introducing means into the denitrating apparatus. 6. The denitration apparatus according to claim 5, wherein the flow rate is adjusted so that the turbulent flow introduced is uniformly dispersed in the vicinity of the end of each denitration catalyst.   The introduction port or the turbulent flow introducing means is provided at a plurality of locations corresponding to the space between the denitration catalysts, and the turbulent flow passage is formed between the denitration catalysts via the introduction port or the turbulent flow introducing means. The denitration apparatus according to any one of claims 4 to 6, wherein the denitration apparatus is configured to branch into each of the two.

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