NOx catalytic reduction synergistic device in fuel coal ammonia-doped combustion

Abstract

The invention relates to the technical field of waste gas treatment, in particular to a NOx catalytic reduction synergistic device in fuel coal ammonia-doped combustion, which comprises a conveying pipe group and a catalysis unit, the conveying pipe group is used for conveying waste gas doped with ammonia gas; the conveying pipe set comprises an input pipe and an output bent pipe which are located on one side of the catalysis unit, and a reversing pipe located on the other side of the catalysis unit. By guiding and conveying waste gas, the dual catalytic treatment effect on the waste gas can be achieved, the catalytic reduction effect of a catalyst on nitric oxide and ammonia gas is effectively improved, the synergistic function is achieved, meanwhile, reverse flowing of the waste gas and reverse air blowing cleaning of the catalyst are utilized, and the catalytic effect is improved. Impurities such as dust adsorbed on the catalyst can be cleared away from the catalyst, so that the purity of the catalyst is improved, the catalyst is prevented from being blocked by the impurities, and the contact rate of the catalyst with nitrogen oxide and ammonia gas is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste gas treatment, in particular to a NOx catalytic reduction efficiency increasing device in coal mixed ammonia combustion. BACKGROUND

[0002] The energy structure transformation is accelerating, and the coal-fired power plants and industrial boilers urgently need to break through the bottleneck of high carbon emission. The coal mixed ammonia combustion technology has become one of the most potential low-carbon transformation paths for coal-fired power plants because it can directly reduce the consumption of fossil fuels and carbon dioxide emission. Ammonia (NH3) is a zero-carbon fuel, and its combustion products are only nitrogen and water. However, there is a complex mechanism of nitrogen oxide (NOx) generation in the process of coal mixed ammonia combustion. On the one hand, the nitrogen element in coal will be converted into thermal and fuel type NOx at high temperature. On the other hand, ammonia molecules are easy to generate additional NOx by oxidation side reaction in the oxygen-rich combustion environment, resulting in a significant increase in the concentration of nitrogen oxides in the flue gas, even exceeding the pure coal combustion condition.

[0003] In order to reduce the emission of nitrogen oxides, it is necessary to carry out catalytic reduction treatment, that is, to use ammonia and catalyst to convert nitrogen oxides in the combustion waste gas into nitrogen and water. However, the traditional treatment method is only to pass the waste gas mixed with ammonia through the catalyst. Since the waste gas contains dust and other impurities, the impurities will deposit on the catalyst, resulting in a decrease in the contact rate of the catalyst with ammonia and nitrogen oxides, and affecting the waste gas treatment effect. SUMMARY

[0004] The present application provides a NOx catalytic reduction efficiency increasing device in coal mixed ammonia combustion, which can effectively solve the problems in the background art.

[0005] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0006] A NOx catalytic reduction efficiency increasing device in coal mixed ammonia combustion, comprising a conveying pipe group and a catalytic unit, the conveying pipe group is used for conveying waste gas mixed with ammonia;

[0007] The conveying pipe group comprises an input pipe and an output elbow pipe located on one side of the catalytic unit, and a reversing pipe located on the other side of the catalytic unit, both ends of the reversing pipe correspond to the input pipe and the output elbow pipe respectively;

[0008] The catalytic unit comprises a base ring and a rotating ring, the base ring has an annular chamber inside, the rotating ring rotates in the annular chamber, and the outer wall of the rotating ring is in sliding fit with the inner wall of the annular chamber. Along the circumferential direction of the rotating ring, a plurality of circular openings are formed on the rotating ring, a carrier is arranged in each circular opening, gas holes are densely arranged on the upper and lower sides of the carrier, and a catalyst is contained in the carrier;

[0009] The two ends of the reversing pipe are located on the two sides of the base ring axis, and the input pipe, the output elbow pipe and the reversing pipe are all communicated and installed on the base ring, the rotating ring rotates in the base ring and makes each carrier pass through the two ends of the reversing pipe in turn.

[0010] In some embodiments of the present application, the catalyst is granular or honeycomb.

[0011] In some embodiments of the present application, the carrier is rotatably arranged in the round port.

[0012] In some embodiments of the present application, the carrier is arranged in the round port in the direction of the rotating ring axis.

[0013] In some embodiments of the present application, an annular gap is formed on the inner circumferential wall of the base ring.

[0014] An installation groove is formed on the inner wall of each round port, and a communication groove is formed on the inner circumferential wall of the rotating ring.

[0015] A tooth ring is arranged on the outer wall of the carrier inside each installation groove, a gear is arranged in the communication groove, and the gear is located in the annular gap, the gear is engaged with the tooth ring, and a stop edge for clamping and limiting the tooth ring is arranged on the upper and lower sides of the gear.

[0016] The power unit is arranged on the base ring, and the power unit is used to provide rotating power and vibration power for the gear.

[0017] In some embodiments of the present application, the power unit includes a stand, a driving motor, a transmission wheel, a dial and a dial column, the stand is coaxially installed on the gear, the driving motor is fixed on the base ring, and the driving motor is used to transmit power to the transmission wheel, the transmission wheel is located between the stand and the inner circumferential wall of the rotating ring, and the transmission wheel transmits power to the stand and the rotating ring.

[0018] The dial is obliquely installed on the end of the stand, an annular groove is formed on the circumferential outer wall of the dial, the dial column is slidably located in the annular groove, and the dial column is fixed relative to the base ring.

[0019] In some embodiments of the present application, a clamping ring is rotatably sleeved on the outer wall of the stand, and a supporting ring is rotatably sleeved on the outer wall of the carrier in each installation groove.

[0020] In some embodiments of the present application, the base ring is provided with an auxiliary structure for pushing the exhaust gas in the carrier deviating from the reversing pipe.

[0021] In some embodiments of the present application, the auxiliary structure comprises two sleeves oppositely arranged on the upper and lower sides of the base ring, each of the sleeves is in communication with the inside of the base ring, a buckle cover is slidingly arranged on each of the sleeves, and the two buckle covers are fixedly connected through a connecting arm.

[0022] In some embodiments of the present application, two air guide bodies are oppositely arranged inside the output end of the reversing pipe, and a long air port is arranged between the two air guide bodies, and the length direction of the long air port is along the radial direction of the base ring.

[0023] The technical scheme of the present application can achieve the following technical effects:

[0024] By guiding and conveying the exhaust gas, the double catalytic treatment effect of the exhaust gas can be realized, the catalytic reduction effect of the catalyst on nitrogen oxides and ammonia gas is effectively improved, the synergistic effect is realized, and the impurities such as dust adsorbed on the catalyst are cleaned and separated from the catalyst by using the reverse flow of the exhaust gas and the reverse air blowing cleaning of the catalyst, thereby improving the purity of the catalyst, avoiding the shielding of the catalyst by the impurities, and reducing the contact rate of the catalyst with nitrogen oxides and ammonia gas. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] Figure 1 is a structural schematic diagram of the present application;

[0027] Figure 2 is a partial cross-sectional structural schematic diagram of the reversing pipe in the embodiment of the present application;

[0028] Figure 3 is a structural schematic diagram of the rotating ring in the embodiment of the present application;

[0029] Figure 4 is Figure 3 is a bottom structural schematic diagram;

[0030] Figure 5 is Figure 4 is an exploded structural schematic diagram;

[0031] Figure 6 is a cross-sectional structural schematic diagram of the rotating ring in the embodiment of the present application;

[0032] Figure 7Fig. 1 is a schematic view of a gear profile structure according to an embodiment of the present application.

[0033] Reference signs:

[0034] 100, input pipe; 101, output elbow pipe; 102, reversing pipe;

[0035] 200, base ring; 201, rotating ring; 202, circular port; 203, carrier; 204, mounting groove; 205, communication groove; 206, gear; 207, tooth ring; 208, retaining edge; 209, stand column; 210, driving motor; 211, transmission wheel; 212, dial; 213, dial column; 214, support ring; 215, snap ring;

[0036] 300, sleeve; 301, buckle cover; 302, connecting arm; 303, connecting column;

[0037] 400, air guide body; 401, long air port. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this description, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0040] As Figures 1 to 7 shown, the NOx catalytic reduction synergistic device in coal combustion with ammonia gas in the present application includes a delivery pipe group and a catalytic unit, and the delivery pipe group is used for delivering waste gas mixed with ammonia gas;

[0041] The delivery pipe group includes an input pipe 100 and an output elbow pipe 101 located at one side of the catalytic unit, and a reversing pipe 102 located at the other side of the catalytic unit, and the two ends of the reversing pipe 102 correspond to the input pipe 100 and the output elbow pipe 101 respectively;

[0042] The catalytic unit includes a base ring 200 and a rotating ring 201, the base ring 200 has an annular chamber inside, the rotating ring 201 rotates in the annular chamber, and the outer wall of the rotating ring 201 is in sliding fit with the inner wall of the annular chamber, along the circumferential direction of the rotating ring 201, a plurality of circular ports 202 are formed on the rotating ring 201, a carrier 203 is arranged in each circular port 202, the upper and lower sides of the carrier 203 are densely distributed with air holes, and the carrier 203 contains a catalyst;

[0043] Wherein, the two ends of the reversing pipe 102 are opposite to the two sides of the axis of the base ring 200, and the input pipe 100, the output elbow pipe 101 and the reversing pipe 102 are all communicated and installed on the base ring 200, the rotating ring 201 rotates in the base ring 200 and makes each carrier 203 pass through the two ends of the reversing pipe 102 in turn;

[0044] In the present application, the conveying pipe group can be used to convey the waste gas mixed with ammonia through the catalytic unit, so that the nitrogen oxides and ammonia in the waste gas are reduced under the action of the catalyst and the nitrogen oxides are converted into nitrogen and water; the input pipe 100, the output elbow pipe 101 and the reversing pipe 102 are separately arranged on the two sides of the base ring 200, the waste gas mixed with ammonia can be conveyed through the input pipe 100 to pass through one side of the base ring 200, and then enter the reversing pipe 102, the waste gas is reversed in the reversing pipe 102 and passes through the other side of the base ring 200 and enters the output elbow pipe 101, the waste gas in the output elbow pipe 101 can be directly discharged or enter the next group of waste gas treatment equipment, since the waste gas can pass through the catalytic unit twice, the double catalytic treatment effect of the waste gas can be realized; of course, in some embodiments, the number of times of passing through the catalytic unit can be increased to realize multiple catalytic treatment work; the base ring 200 can be horizontally, vertically or obliquely arranged, and its orientation can be determined according to actual needs;

[0045] The rotating ring 201 in the base ring 200 can rotate, so the rotating ring 201 can drive the several carriers 203 to move in a circular motion, and the several carriers 203 circulate between the two ends of the reversing pipe 102; since the outer wall of the rotating ring 201 is attached to the inner wall of the annular chamber, the rotating ring 201 can isolate the annular chamber, so that the waste gas discharged from the output end of the input pipe 100 cannot directly enter the output elbow pipe 101 through the annular chamber, thereby enabling the waste gas to move along the trajectory of the conveying pipe group smoothly;

[0046] In use, the rotating ring 201 and the carriers 203 thereon rotate cyclically, the exhaust gas containing ammonia is introduced into one side of the base ring 200 through the input pipe 100, at this time the exhaust gas passes through a carrier 203 and flows into the reversing pipe 102, the catalyst filled in the carrier 203 catalytically processes the nitrogen oxides and ammonia in the exhaust gas, so that the nitrogen oxides and ammonia are converted into nitrogen and water, thereby realizing catalytic reduction processing of the nitrogen oxides, and then the exhaust gas in the reversing pipe 102 turns and flows to the other side of the base ring 200, at this time the exhaust gas again passes through the corresponding carrier 203 in the base ring 200 and enters the output elbow pipe 101, the exhaust gas is again subjected to catalytic reduction processing, thereby realizing double catalytic effect of the exhaust gas, realizing synergistic processing of the nitrogen oxides, and the exhaust gas in the output elbow pipe 101 can be smoothly discharged; since the rotating ring 201 and the carriers 203 thereon can rotate cyclically, the catalyst at the input end of the reversing pipe 102 can move to the output end position of the reversing pipe 102, and the exhaust gas in the reversing pipe 102 can perform reverse air blowing processing on the catalyst in the carrier 203 at the output end position of the reversing pipe 102, so that the dust and other impurities adsorbed on the catalyst can be cleaned and separated from the catalyst, thereby avoiding shielding of the catalyst by the impurities and improving the contact rate of the catalyst with the nitrogen oxides and ammonia, thereby further realizing the synergistic function; the cleaned catalyst moves to the input end position of the reversing pipe 102 again, thereby realizing repeated cleaning and reuse of the catalyst; since water is generated after reduction of the nitrogen oxides, the reverse cleaning of the catalyst at the output end position of the reversing pipe 102 can remove the water in the catalyst, thereby improving the working effect of the catalyst;

[0047] By guiding and conveying the exhaust gas, double catalytic processing effect of the exhaust gas can be realized, the catalytic reduction effect of the catalyst on the nitrogen oxides and ammonia is effectively improved, the synergistic function is realized, and at the same time, by using reverse flow of the exhaust gas and reverse air blowing cleaning of the catalyst, the dust and other impurities adsorbed on the catalyst can be cleaned and separated from the catalyst, thereby improving the purity of the catalyst, avoiding shielding of the catalyst by the impurities, and reducing the contact rate of the catalyst with the nitrogen oxides and ammonia.

[0048] In some embodiments of the present application, the catalyst is in the form of particles or honeycomb;

[0049] When the catalyst is in the form of particles, it is in the shape of a cylinder, a sphere or a porous pellet with a diameter of 3-10 mm, which can be filled in the carrier 203 and form a porous and multi-layer bed structure, and this form of catalyst is mainly used in low-temperature and low-dust environments and is helpful to reduce local ammonia escape;

[0050] The honeycomb-shaped catalyst is in the form of a monolith or a multi-layer superposition, which is mainly suitable for high-temperature and high-dust environments, and the inside of the catalyst adopts a combination of large pore size and smooth wall surface to reduce impurity deposition.

[0051] Since the exhaust gas can flow along the internal gap path of the catalyst when passing through the carrier 203 and the catalyst therein, the exhaust gas in the middle of the gap has a low contact rate with the catalyst, while the exhaust gas on the outside of the gap can contact the catalyst, which causes the catalyst to fail to comprehensively catalytically reduce the exhaust gas, affecting the nitrogen oxide treatment effect. To improve this phenomenon, the flow path of the exhaust gas in the catalyst can be disordered to improve the contact effect. Specifically, the carrier 203 is rotatably arranged in the round port 202. By using the rotational movement of the carrier 203, the catalyst therein can be in a dynamic state, thereby relatively moving the catalyst and the exhaust gas to improve the contact rate of the catalyst with the exhaust gas. The rotational movement of the carrier 203 is mainly the rotation movement.

[0052] Since the impurities in the exhaust gas will deposit on the catalyst when passing through the catalyst, which causes the contact rate of the catalyst with the exhaust gas to decrease, therefore, to improve the cleaning effect of the impurities, the movement of the carrier 203 can be specially set. Specifically, along the axis direction of the rotating ring 201, the carrier 203 is vibratably arranged in the round port 202. By using the vibration movement of the carrier 203 along the axis direction thereof, the impurities deposited in the internal catalyst can be vibrated and fallen off, and then combined with the reverse flow of the exhaust gas, thereby improving the cleaning effect of the catalyst.

[0053] In some embodiments of the present application, an annular gap is formed in the circumferential inner wall of the base ring 200.

[0054] An installation groove 204 is formed in the inner wall of each round port 202, and a communication groove 205 is formed in the circumferential inner wall of the rotating ring 201, each installation groove 204 being communicated with the communication groove 205.

[0055] A tooth ring 207 is arranged on the outer wall of the carrier 203 on the inner side of each installation groove 204, a gear 206 is arranged in the communication groove 205, and the gear 206 is located in the annular gap, the gear 206 being meshingly connected with the tooth ring 207, and a stop edge 208 for clamping and limiting the tooth ring 207 is arranged on the upper and lower sides of the gear 206.

[0056] The power unit is arranged on the base ring 200, and is used for providing the gear 206 with rotational power and vibration power.

[0057] The installation groove 204 is mainly used for providing the tooth ring 207 with an installation position, and the communication groove 205 is mainly used for providing a space for the meshing connection of the tooth ring 207 and the gear 206. The annular gap in the middle of the base ring 200 can be used for providing an installation space for the gear 206, and the gear 206 can simultaneously provide rotational power for multiple tooth rings 207, thereby enabling the multiple carriers 203 to synchronously rotate.

[0058] In actual use, the rotating direction of the gear 206 is opposite to the rotating direction of the rotating ring 201, so as to improve the self-rotating speed of the carrier 203 on the rotating ring 201; the two stop edges 208 on the gear ring 207 can be used to limit the gear ring 207 and the gear 206 in the vertical direction, so that the gear 206 can drive the multiple carriers 203 to vibrate in the vertical direction synchronously when the gear 206 vibrates in the vertical direction, thereby achieving the rotating and vibrating purposes of the carrier 203.

[0059] In some embodiments of the present application, as shown in Figure 4 The power unit comprises a column 209, a driving motor 210, a transmission wheel 211, a dial 212 and a dial column 213, the column 209 is coaxially installed on the gear 206, the driving motor 210 is fixed on the base ring 200, and the driving motor 210 is used to transmit power to the transmission wheel 211, the transmission wheel 211 is located between the column 209 and the circumferential inner wall of the rotating ring 201, and the transmission wheel 211 transmits power to the column 209 and the rotating ring 201.

[0060] The dial 212 is obliquely installed on the end of the column 209, the circumferential outer wall of the dial 212 is provided with a ring groove, the dial column 213 is slidably located in the ring groove, and the dial column 213 is fixed relative to the base ring 200.

[0061] The driving motor 210 and the dial column 213 can be fixedly installed on the base ring 200, the driving motor 210 can provide rotating power for the transmission wheel 211, since the transmission wheel 211 is located between the column 209 and the inner wall of the rotating ring 201, the rotating transmission wheel 211 can simultaneously drive the column 209 and the rotating ring 201 to rotate, and the rotating direction of the column 209 is opposite to the rotating direction of the rotating ring 201; when the column 209 rotates, it drives the dial 212 to rotate synchronously, since the dial 212 is obliquely installed, the contact position between the dial 212 and the dial column 213 moves reciprocally in the vertical direction, thereby making the column 209 reciprocally vibrate in the vertical direction, so as to provide power for the rotation and vibration of the gear 206; the transmission wheel 211 and the column 209 can adopt friction transmission or gear transmission and the like.

[0062] Since the vibration of the carrier 203 relies on the pushing action of the two stop edges 208 on the gear 206, and the pushing force can only act on one side of the carrier 203, this will cause the carrier 203 to be unevenly stressed, resulting in unstable movement of the carrier 203, in order to solve this problem, as shown in Figure 7In the shown mode, the outer wall of the column 209 is rotationally sleeved with a snap ring 215, the outer wall of each carrier 203 in the mounting groove 204 is rotationally sleeved with a supporting ring 214, and the supporting ring 214 is fixedly connected with the snap ring 215; when the column 209 rotates, it will rotate relative to the snap ring 215, and when the column 209 vibrates up and down, it will drive each carrier 203 to vibrate through the snap ring 215 and the supporting ring 214, thereby making the movement of the carrier 203 more stable.

[0063] In some embodiments of the application, the base ring 200 is provided with auxiliary structures for pushing the exhaust gas in the carrier 203 deviated from the reversing pipe 102;

[0064] Since the carrier 203 performs vertical reciprocating motion in the round port 202, the top and bottom of the carrier 203 will have a height difference with the upper and lower surfaces of the rotating ring 201, that is, there will be a gap on both sides of the carrier 203, and there will be a small amount of exhaust gas in the gap, and there will also be exhaust gas in the carrier 203. When the carrier 203 deviates from the reversing pipe 102, the exhaust gas in the gap and the exhaust gas in the carrier 203 cannot enter the reversing pipe 102, and this part of exhaust gas will be directly affected by the backflow gas in the reversing pipe 102 when moving to the input end position of the output elbow pipe 101, thereby causing this part of exhaust gas to be unable to be effectively treated. To avoid this phenomenon, the auxiliary structure can be used to make the exhaust gas in the carrier 203 and the corresponding gap pass through the catalyst in the carrier 203 and reciprocate when the carrier 203 deviates from the reversing pipe 102, so that this part of exhaust gas can also be effectively treated by the catalyst in the carrier 203. It should be pointed out that the above-mentioned mode is mainly for the exhaust gas in the gap, and the exhaust gas in the catalyst only needs to rely on the rotating motion of the carrier 203 to complete the catalytic work. Of course, this way of making the exhaust gas repeatedly pass through the catalyst can effectively improve the catalytic effect of the catalyst on the exhaust gas.

[0065] In some embodiments of the application, the auxiliary structure includes two sets of pipes 300 arranged on the upper and lower sides of the base ring 200, each set of pipe 300 is communicated with the inside of the base ring 200, and each set of pipe 300 is slidably provided with a buckle cover 301, the two buckle covers 301 are fixedly connected through a connecting arm 302, a connecting column 303 is rotationally arranged in the middle of the gear 206, and the connecting column 303 is fixedly connected with one buckle cover 301.

[0066] When the gear 206 rotates, it will produce relative rotation with the connecting column 303, when the gear 206 vibrates, it will drive the two buckles 301 to move up and down synchronously through the connecting column 303 and the connecting arm 302, when the two buckles 301 move up synchronously, the air inside the lower sleeve 300 will be supplemented into the corresponding circular port 202, and the exhaust gas in the corresponding carrier 203 will flow upwards through the catalyst, when the two buckles 301 move down synchronously, the exhaust gas will flow downwards through the catalyst, thereby making the exhaust gas in the circular port 202 circulate through the catalyst.

[0067] In some embodiments of the present application, two air guide bodies 400 are arranged inside the output end of the reversing pipe 102 in opposite directions, and a long air port 401 is arranged between the two air guide bodies 400, the length direction of the long air port 401 is along the radial direction of the base ring 200;

[0068] When the exhaust gas discharged from the output end of the reversing pipe 102 is used for reverse cleaning treatment of the catalyst, in order to improve the cleaning effect, the wind speed can be increased, specifically, the output end of the reversing pipe 102 can be blocked by the two air guide bodies 400 described above, so that the exhaust gas can only flow through the long air port 401, which can realize the effect of air gathering, and by using the long air port 401, all positions on the carrier 203 passing through the output end of the reversing pipe 102 can be air blown, thereby realizing the overall reverse cleaning effect of the carrier 203 and the catalyst inside it.

[0069] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, the above embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A device for enhancing the efficiency of NOx catalytic reduction in coal-fired ammonia combustion, characterized in that: It includes a delivery pipe group and a catalytic unit, wherein the delivery pipe group is used to deliver the exhaust gas mixed with ammonia; The delivery pipe group includes an input pipe and an output elbow located on one side of the catalytic unit, and a reversing pipe located on the other side of the catalytic unit, and the two ends of the reversing pipe correspond to the input pipe and the output elbow respectively; The catalytic unit includes a base ring and a rotating ring. The base ring has an annular chamber inside. The rotating ring rotates in the annular chamber, and the outer wall of the rotating ring slides in contact with the inner wall of the annular chamber. Along the circumferential direction of the rotating ring, the rotating ring is provided with a plurality of circular openings. A carrier is provided in each of the circular openings. The upper and lower sides of the carrier are densely covered with pores. The catalyst is contained in the carrier. The two ends of the reversing tube are relatively located on both sides of the base ring axis, and the input tube, the output elbow and the reversing tube are all connected and installed on the base ring. The rotating ring rotates in the base ring and allows each carrier to pass through the two ends of the reversing tube in turn.

2. The NOx catalytic reduction efficiency enhancement device in coal-fired ammonia combustion according to claim 1, characterized in that: The catalyst is in a granular or honeycomb shape.

3. The NOx catalytic reduction efficiency enhancement device in coal-fired ammonia combustion according to claim 1, characterized in that: The carrier is rotatably arranged in the circular opening.

4. The NOx catalytic reduction efficiency enhancement device in coal-fired ammonia combustion according to claim 1, characterized in that: Along the axis direction of the rotating ring, the carrier can be vibrated in the circular opening.

5. The NOx catalytic reduction efficiency enhancement device in coal-fired ammonia combustion according to claim 1, characterized in that: An annular notch is provided on the inner circumferential wall of the base ring; A mounting groove is provided on the inner wall of each circular opening, a connecting groove is provided on the circumferential inner wall of the rotating ring, and each mounting groove is connected to the connecting groove; A gear ring is provided on the outer wall of the carrier inside each of the mounting grooves, a gear is provided in the communicating groove, and the gear is located in the annular notch, the gear is meshed with the gear ring, and the upper and lower sides of the gear are provided with ribs for limiting the position of the gear ring; Wherein, a power unit is provided on the base ring, and the power unit is used to provide rotational power and vibration power for the gear.

6. The NOx catalytic reduction efficiency enhancement device in coal-fired ammonia combustion according to claim 5, characterized in that: The power unit includes a column, a drive motor, a transmission wheel, a dial and a dial column, wherein the column is coaxially mounted on the gear, the drive motor is fixed on the base ring, and the drive motor is used to transmit power to the transmission wheel, and the transmission wheel is located between the column and the inner wall of the circumference of the rotating ring, and the transmission wheel transmits power to the column and the rotating ring; The dial is obliquely mounted on the end of the column, an annular groove is provided on the circumferential outer wall of the dial, the dial post is slidably located in the annular groove, and the dial post is relatively fixed to the base ring.

7. The NOx catalytic reduction efficiency enhancement device in coal-fired ammonia combustion according to claim 6, characterized in that: A clamping ring is rotatably mounted on the outer wall of the column, and a supporting ring is rotatably mounted on the outer wall of the carrier in each mounting groove, and the supporting ring is fixedly connected to the clamping ring.

8. The NOx catalytic reduction efficiency enhancement device in coal-fired ammonia combustion according to claim 5, characterized in that: The base ring is provided with an auxiliary structure for pushing the exhaust gas in the carrier that deviates from the reversing tube.

9. The NOx catalytic reduction efficiency enhancement device in coal-fired ammonia combustion according to claim 8, characterized in that: The auxiliary structure includes two sleeves relatively arranged on the upper and lower sides of the base ring, each of the sleeves is communicated with the inside of the base ring, and a buckle cover is slidably provided on each sleeve. The two buckle covers are fixedly connected by a connecting arm, and a connecting column is rotatably provided in the middle of the gear, and the connecting column is relatively fixed to one of the buckle covers.

10. The NOx catalytic reduction efficiency enhancement device in coal-fired ammonia combustion according to claim 1, characterized in that: Two air guides are arranged opposite to each other inside the output end of the reversing tube, a long air outlet is arranged between the two air guides, and the length direction of the long air outlet is along the radial direction of the base ring.

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