A device for denitration treatment of nitration exhaust gas

Abstract

The application discloses a nitration waste gas denitration treatment device, and relates to the technical field of environmental protection, in particular to a nitration waste gas denitration treatment device, which comprises a denitration tower, a plurality of driving rods capable of changing rotating speed according to waste gas flow speed are arranged in the denitration tower, a plurality of separation cylinders capable of separating the space in the denitration tower into a plurality of annular flow channels are arranged on the driving rods, and a driven plate capable of rotating synchronously with the driving rods is arranged between the upper and lower adjacent separation cylinders. Through the cooperative arrangement of the driven plate, the communication port, the arc-shaped groove and the short separation plate, dynamic adaptive adjustment of flow field disturbance and reaction time in the waste gas treatment process can be realized. When the driven plate rotates synchronously with the waste gas flow speed, the surface communication port of the driven plate forms pulse flow of "acceleration penetration-retardation eddy current" through high-frequency on-off of the upper and lower straight passages, the waste gas passes through the straight passage at high speed when the communication ports are aligned, and the arc-shaped groove guides the airflow to form a backflow eddy current when the driven plate rotates away, thereby significantly prolonging the residence time of the gas on the surface of the SCR catalyst.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of environmental protection, more particularly, the present application relates to a nitration waste gas denitration treatment device. BACKGROUND

[0002] In the process of modern industrial production, many industries such as thermal power generation, steel smelting, chemical manufacturing, etc. will inevitably produce a large amount of waste gas containing nitrogen oxides in the process of burning fossil fuels or high-temperature processes. If these waste gases are directly discharged without effective treatment, not only will they exacerbate environmental problems such as acid rain and photochemical smog, but also will cause serious harm to the human respiratory system and the ecological system. Therefore, denitration treatment has become a key link in the treatment of industrial waste gas.

[0003] For example, the waste gas denitration device and its waste gas treatment system with the application number 202411570876.X is a technology for denitration of waste gas. In the above patent, different amounts of low-temperature gas are added at different temperatures to replace the high-temperature and low-temperature gas mixing method for cooling the boiler waste gas. In this application, different amounts of low-temperature gas are added to correspond to different cross-sectional areas through which the low-temperature gas passes, so that the speed of the gas passing through the catalytic zone is appropriate, ensuring that the reaction proceeds normally, and the entire process does not need to be heated, which is beneficial to reduce energy consumption.

[0004] However, there is a thorny problem in actual operation: the flow of waste gas entering the denitration tower is not constant. Influenced by factors such as production load fluctuation, equipment start-stop, etc., the amount of waste gas will fluctuate greatly. When the flow of waste gas increases suddenly, the flow rate of the gas in the denitration tower increases significantly, resulting in a significant reduction in reaction time. Therefore, the contact time between the reaction gas and the catalyst is insufficient, which makes the denitration reaction unable to proceed fully, and a large amount of nitrogen oxides is discharged into the atmosphere without effective treatment, causing serious environmental pollution. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a nitration waste gas denitration treatment device to solve the problems raised in the background art.

[0006] The technical scheme of the present application is as follows:

[0007] In order to achieve the above object, the present application is implemented by the following technical scheme: a nitration waste gas denitration treatment device, comprising a denitration tower, a plurality of driving rods capable of changing the rotating speed according to the waste gas flow speed are arranged in the denitration tower, a plurality of separation cylinders capable of separating the space in the denitration tower into a plurality of annular flow channels are sleeved on the driving rods, a driven plate capable of rotating synchronously with the driving rod is arranged between the upper and lower adjacent separation cylinders, a plurality of long separation plates capable of separating the annular flow channel into a plurality of straight channels are arranged in each annular flow channel, a plurality of communication openings capable of intermittently connecting the upper and lower adjacent straight channels are uniformly arranged on the upper surface of the driven plate, and a plurality of arc-shaped grooves are uniformly arranged on the upper surface of the driven plate.

[0008] Preferably, a flow-through cylinder is fixedly installed on the top of the inner circumferential surface of the denitration tower, an aggregation cylinder capable of aggregating the waste gas to the flow-through cylinder is arranged on the top of the flow-through cylinder, a driving fan driven by the waste gas flow is arranged in the flow-through cylinder, and the top end of the first driving rod from top to bottom is fixedly connected to the rotating shaft of the driving fan.

[0009] Preferably, the sleeved separation cylinders are fixedly connected through the long separation plates, the separation cylinders attached to the inner wall of the denitration tower are fixedly connected to the inner wall of the denitration tower, and the centers of the upper and lower surfaces of the driven plate are fixedly connected to the corresponding driving rods.

[0010] Preferably, each long separation plate comprises a plurality of short separation plates sequentially abutting together from top to bottom, the first short separation plate from top to bottom is fixedly connected to the corresponding separation cylinder, and the last short separation plate from top to bottom is slidingly connected to the bottom end of the corresponding separation cylinder, a stabilizing component is arranged between the short separation plates abutting together, and a plurality of poking components capable of circumferentially moving the short separation plates in the annular flow channel are arranged on the upper surface of the driven plate.

[0011] Preferably, the stabilizing component comprises an auxiliary moving plate fixedly connected to the top end of the short separation plate, a second mounting groove is arranged on the lower surface of the short separation plate, the auxiliary moving plate is slidingly connected in the corresponding second mounting groove, and one side of the auxiliary moving plate is fixedly connected to a second spring with one end arranged on one side of the second mounting groove.

[0012] Preferably, the toggle component comprises a support cylinder fixedly connected to the upper surface of the driven plate, a plurality of drive cavities corresponding to the support cylinder and communicating with the support cylinder are uniformly arranged in the driven plate, the inner wall of the support cylinder is slidably connected with an auxiliary lifting barrel, the lower surface of the auxiliary lifting barrel is fixedly connected with an elastic cylinder arranged at the bottom end of the inner circumferential surface of the support cylinder, the inner wall of the auxiliary lifting barrel is provided with an auxiliary translation barrel capable of moving along the length direction of the auxiliary lifting barrel, the inner wall of the auxiliary translation barrel is rotatably connected with an auxiliary push plate, and a reset torsional spring is arranged at the connection position of the auxiliary push plate and the auxiliary translation barrel, one end of a first tension spring is fixedly connected to the side surface of the drive cavity and the other end of the first tension spring is fixedly connected to the side of the extrusion plate away from the support cylinder, and the lower surface of the last short partition plate from top to bottom is fixedly connected with an auxiliary baffle.

[0013] Preferably, one side of the auxiliary translation barrel is fixedly connected with an auxiliary extrusion plate, one end of a third spring is fixedly connected to the inner side surface of the auxiliary lifting barrel and the other end of the third spring is fixedly connected to the end of the auxiliary extrusion plate away from the auxiliary translation barrel.

[0014] Preferably, the bottom end of the last short partition plate from top to bottom protrudes a protruding block slidably connected in the corresponding partition cylinder, the bottom end of the outer circumferential surface of the partition cylinder is uniformly provided with a first mounting groove, a plurality of protruding blocks are respectively slidably connected in the corresponding first mounting grooves, and one side of the protruding block is fixedly connected with a first spring having one end arranged on the side surface of the first mounting groove.

[0015] Preferably, one side of the short partition plate is provided with a back flushing channel, and the top end of the back flushing channel penetrates the upper surface of the short partition plate.

[0016] Beneficial effects

[0017] The application provides a nitration waste gas denitration treatment device, which has the following beneficial effects:

[0018] 1. The nitration waste gas denitration treatment device can realize dynamic adaptive adjustment of flow field disturbance and reaction time in the waste gas treatment process through the cooperative arrangement of the driven plate, the communication port, the arc-shaped groove and the short partition plate. When the driven plate rotates synchronously with the waste gas flow rate, the high-frequency on-off of the surface communication port to the up-down straight channel forms the pulse flow of "acceleration penetration-vortex resistance", the waste gas passes through the straight channel at high speed when the communication ports are aligned, and the arc-shaped groove guides the airflow to form a backflow vortex when the driven plate rotates away, thereby significantly prolonging the residence time of the gas on the surface of the SCR catalyst.

[0019] 2. The device for denitration treatment of nitration waste gas, through the Tesla valve structure of the backflush channel, the short partition plate is passively opened when being short, high-speed waste gas is converted into high-speed jet flow opposite to the main flow, the axial flow velocity is reduced through momentum exchange and spiral turbulence is induced, so that the average residence time of the gas in the straight channel is improved; the auxiliary moving plate and the second spring ensure accurate resetting of the short partition plate after disturbance. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the application;

[0021] Figure 2 It is a structural schematic diagram of the partial section of the denitration tower;

[0022] Figure 3 It is a structural schematic diagram of the partial section of the denitration tower; Figure 2

[0023] Figure 4 It is a structural schematic diagram of the partial section of the denitration tower;

[0024] Figure 5 It is a structural schematic diagram of the partial section of the denitration tower; Figure 4

[0025] Figure 6 It is a structural schematic diagram of the partial section of the denitration tower;

[0026] Figure 7 It is a structural schematic diagram of the partial section of the denitration tower;

[0027] Figure 8 It is a structural schematic diagram of the partial section of the denitration tower;

[0028] Figure 9 It is a structural schematic diagram of the partial section of the denitration tower;

[0029] In the figure: 1, denitration tower; 2, flow-through cylinder; 3, driving rod; 4, partition cylinder; 5, short partition plate; 6, driven plate; 7, extrusion plate; 8, first tension spring; 9, driving cavity; 10, support cylinder; 11, elastic cylinder; 12, auxiliary lifting bucket; 13, auxiliary translation bucket; 14, auxiliary push plate; 15, communication port; 16, arc-shaped groove; 17, first spring; 18, first mounting groove; 19, auxiliary moving plate; 20, second spring; 21, backflush channel; 22, auxiliary baffle; 23, auxiliary extrusion plate; 24, third spring. DETAILED DESCRIPTION

[0030] ​​With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0031] Embodiment one

[0032] In the process of modern industrial production, many industries such as thermal power generation, steel smelting, chemical manufacturing, etc. will inevitably produce a large amount of nitrogen oxide-containing exhaust gas in the process of burning fossil fuels or high-temperature processes. If these exhaust gases are directly discharged without effective treatment, not only will they exacerbate environmental problems such as acid rain and photochemical smog, but also will cause serious harm to the human respiratory system and the ecological system. Therefore, denitration treatment has become a key link in the treatment of industrial exhaust gas.

[0033] At present, denitration towers are widely used as core treatment equipment, but in actual operation, there is a thorny problem: the flow of exhaust gas entering the denitration tower is not constant. Influenced by factors such as production load fluctuation, equipment start-stop, etc., the amount of exhaust gas will fluctuate greatly. When the flow of exhaust gas suddenly increases, the flow rate of the gas in the denitration tower will significantly increase, resulting in a significant reduction in reaction time. Taking the selective catalytic reduction (SCR) denitration process as an example, the contact time between the reaction gas and the catalyst is insufficient, which makes the denitration reaction unable to proceed fully, and a large amount of nitrogen oxides is discharged into the atmosphere without effective treatment, causing serious environmental pollution. To solve the above problems, the present embodiment is invented.

[0034] Please refer to Figures 1 to 9 The present application provides a technical solution: a nitrated exhaust gas denitration treatment device, comprising a denitration tower 1, a plurality of active rods 3 capable of changing the speed according to the flow speed of the exhaust gas are arranged in the denitration tower 1, and a plurality of separation cylinders 4 capable of promoting the denitration tower 1 to be separated into a plurality of annular flow channels are arranged on the active rods 3, wherein the space separated by the separation cylinder 4 is only the space in the middle of the denitration tower 1, and as Figure 2As shown, the upper and lower adjacent two separation cylinders 4 are also not connected, and a SCR (Selective Catalytic Reduction) catalyst is arranged in the annular flow channel, and the working principle of the SCR catalyst is the same as that in the patent application file with the application number 202411570876.X, so it will not be described in detail, and a driven plate 6 capable of rotating synchronously with the driving rod 3 is arranged between the upper and lower adjacent separation cylinders 4, and there is a gap between the driven plate 6 and the separation cylinder 4, so that when the driven plate 6 rotates, it will not be affected by the separation cylinder 4. A plurality of long separation plates capable of separating the annular flow channel into a plurality of straight channels are arranged in each of the annular flow channels. The upper surface of the driven plate 6 is uniformly provided with a plurality of communication openings 15 capable of promoting intermittent communication between the upper and lower adjacent straight channels, and the upper surface of the driven plate 6 is uniformly provided with a plurality of arc-shaped grooves 16.

[0035] Therefore, when the exhaust gas enters the middle part of the flow-through cylinder 2, the separation cylinder 4 and the long separation plate can promote the exhaust gas to be distributed into a plurality of straight channels.

[0036] Please refer to Figures 1 to 2 The inner wall of the denitration tower 1 is fixedly installed with a flow-through cylinder 2 at the top, and the top of the flow-through cylinder 2 is provided with an accumulation cylinder capable of accumulating exhaust gas to the flow-through cylinder 2. A driving fan driven by exhaust gas flow is arranged in the flow-through cylinder 2, and the top end of the first driving rod 3 is fixedly connected to the rotating shaft of the driving fan, wherein the rotating shaft of the driving fan is stably arranged on the inner wall of the flow-through cylinder 2 by a bearing. The driving fan is fixedly installed at the top end of the rotating shaft, and the top end of the first driving rod 3 is fixedly connected to the bottom end of the rotating shaft, so that the rotation of the driving fan can drive the driving rod 3 to rotate synchronously.

[0037] Therefore, when the exhaust gas is introduced from the top of the denitration tower 1, under the guiding effect of the accumulation cylinder, the exhaust gas forms a directional gathering effect and orderly enters the middle area of the denitration tower 1 through the flow-through cylinder 2. The driving fan in the flow-through cylinder 2 is driven by the kinetic energy of the exhaust gas flow, and when the exhaust gas flows at high speed, the driving fan blades are forced to rotate. The rotating shaft of the driving fan is rigidly connected with the driving rod 3, so that the driving rod 3 also obtains rotary power synchronously with the continuous rotation of the driving fan, realizing mechanical transmission. In addition, a spray head is arranged at the bottom end of the inner wall of the flow-through cylinder 2, which can atomize and spray urea water solution. Since the spraying process of the atomized urea water solution in the denitration tower is a mature technology, only the functionality is described here, and the technical details will not be described.

[0038] Please refer to Figures 1 to 2The long partition plate fixedly connected with the partitioning cylinder 4 is fixedly connected to the inner wall of the denitration tower 1, and the center of the upper and lower surfaces of the driven plate 6 is fixedly connected to the corresponding driving rod 3, so that when the first driving rod 3 from top to bottom is driven to rotate, all the driven plates 6 can rotate synchronously with the driving rod 3, wherein the bottom end of the last driving rod 3 from top to bottom is rotatably connected to the bottom surface of the denitration tower 1, and the top of the first driving rod 3 from top to bottom is also rotatably arranged on the inner circumferential surface of the flow cylinder 2, so that all the driving rods 3 and the driven plates 6 can stably rotate.

[0039] When the exhaust gas enters the middle part of the denitration tower 1 through the flow cylinder 2, the multi-stage shunt structure formed by the partitioning cylinder 4 and the long partition plate guides the gas flow into a plurality of straight channels. When the driven plate 6 rotates synchronously with the driving rod 3, the surface communication port 15 periodically shields the corresponding interfaces of the upper and lower straight channels, forming intermittent gas flow conduction. When the communication port 15 rotates away from the alignment position, the exhaust gas in the upper straight channel is impacted on the surface of the driven plate 6 due to the obstruction of the flow, significantly prolonging the residence time of the gas in the straight channel. At the same time, the gap between the bottom end of the long partition plate and the driven plate 6 allows the exhaust gas in adjacent straight channels to produce transverse counterflow, thereby enhancing the gas-liquid mixing and catalytic reaction contact efficiency through the effect of turbulent flow.

[0040] When the inlet exhaust gas flow rate increases, the driving fan rotation speed increases synchronously with the gas flow power, and the driven plate 6 is driven by the driving rod 3 to rotate at a higher frequency. At this time, the high-speed gas flow in the straight channel impacts the curved surface structure of the arc-shaped groove 16 of the driven plate 6, and a backflow effect is generated under the effect of flow guide, thereby forming a stable vortex flow in the straight channel. When the driven plate 6 rotates synchronously with the exhaust gas flow rate, the high-frequency on-off of the surface communication port 15 of the driven plate 6 to the upper and lower straight channels causes the exhaust gas to form a “speed-up-retardation” pulse flow in the straight channel: when the communication port 15 is aligned, the exhaust gas penetrates the straight channel at high speed and accelerates, and when the communication port rotates away, the exhaust gas flow is blocked and forms a backflow vortex under the action of the arc-shaped groove 16, thereby forcing the gas to stay and fully contact with the SCR catalyst. This high-frequency pulse flow makes the macroscopic flow rate of the exhaust gas increase with the increase of the rotation speed, but the periodic retardation effect enhances the disordered mixing of the gas through the vortex flow, significantly prolongs the effective residence time of the exhaust gas on the catalyst surface, and the increase of the on-off frequency caused by the rapid rotation of the driven plate 6 can avoid the problem of insufficient reaction time caused by high-speed flow through the “acceleration penetration-vortex retention” circulation mechanism when the exhaust gas flow increases, thereby improving the denitration efficiency from the aspects of flow field optimization and residence time compensation, and realizing the self-adaptive and efficient treatment of exhaust gas of different flow rates.

[0041] Example Two

[0042] The above embodiment alleviates the problem of insufficient denitration time caused by exhaust gas flow fluctuation to a certain extent through the "acceleration penetration-vortex retention" cycle mechanism driven by the change of the driven plate 6 speed, but in actual working conditions, it is found that the traditional rigid long partition plate structure cannot accurately adjust the disturbance amplitude of high-speed airflow. In order to further improve the dynamic adaptability of the denitration tower 1 in variable flow exhaust gas treatment and realize accurate matching of disturbance intensity and flow rate, the embodiment is invented.

[0043] Please refer to Figures 1 to 9 On the basis of the above embodiment, the technical scheme is that each long partition plate includes a plurality of short partition plates 5 that are in contact with each other from top to bottom, and the first short partition plate 5 from top to bottom is fixedly connected to the corresponding partition cylinder 4, and the last short partition plate 5 from top to bottom is slidingly connected to the bottom end of the corresponding partition cylinder 4. A stabilizing component is provided between the short partition plates 5 that are in contact with each other, and the upper surface of the driven plate 6 is provided with a plurality of poking components that can promote the short partition plates 5 to move circumferentially in the annular flow channel.

[0044] In each group of short partition plates 5 (here, each group of short partition plates 5 is a long partition plate), the first short partition plate 5 from top to bottom is tightly attached to the inner wall of the denitration tower 1 and is fixedly connected to the denitration tower 1. Through this fixed connection structure, the partition cylinder 4 can be stably installed inside the denitration tower 1, effectively enhancing the structural stability of the partition cylinder 4 inside the denitration tower 1, and ensuring its reliable partitioning and flow guiding function during the exhaust gas treatment process.

[0045] Please refer to Figures 1 to 8 The stabilizing component includes an auxiliary moving plate 19 fixedly connected to the top end of the short partition plate 5, and a second installation groove is formed in the lower surface of the short partition plate 5, and the auxiliary moving plate 19 is slidingly connected in the corresponding second installation groove. One side of the auxiliary moving plate 19 is fixedly connected with a second spring 20 arranged at one side of the second installation groove;

[0046] When the upper and lower adjacent short partition plates 5 slide relative to each other under the action of external force, the auxiliary moving plate 19 moves synchronously and compresses the second spring 20, converting the external force into the elastic potential energy of the second spring 20. After the external force disappears, the second spring 20 quickly releases the stored elastic potential energy, and pushes the auxiliary moving plate 19 to move in the opposite direction by the elastic force, thereby driving the short partition plate 5 to accurately reset, ensuring that all components always maintain a stable initial spacing and working state.

[0047] Please refer to Figures 2 to 9The toggle component comprises a support cylinder 10 fixedly connected to the upper surface of a driven plate 6, a plurality of drive cavities 9 are uniformly formed in the driven plate 6 and communicate with the support cylinder 10 one by one, the inner wall of the support cylinder 10 is slidably connected with an auxiliary lifting barrel 12, and the lower surface of the auxiliary lifting barrel 12 is fixedly connected with an elastic cylinder 11 arranged at the bottom end of the inner wall of the support cylinder 10, wherein the elastic cylinder 11 is made of high-elasticity rubber material, and the unique flexible structure can realize dynamic sealing between the auxiliary lifting barrel 12 and the support cylinder 10. Meanwhile, the closed space formed by the drive cavities 9, the support cylinder 10 and the auxiliary lifting barrel 12 is filled with water medium, the inner wall of the auxiliary lifting barrel 12 is provided with an auxiliary translation barrel 13 capable of moving along the length direction of the auxiliary lifting barrel 12, the inner wall of the auxiliary translation barrel 13 is rotatably connected with an auxiliary push plate 14, and the connection position between the auxiliary push plate 14 and the auxiliary translation barrel 13 is provided with a reset torsional spring, one end of the auxiliary push plate 14 is fixedly connected with a first tension spring 8 arranged on the side surface of the drive cavity 9, and the lower surface of the last short partition plate 5 from top to bottom is fixedly connected with an auxiliary baffle 22.

[0048] One side of the auxiliary translation barrel 13 is fixedly connected with an auxiliary extrusion plate 23, one end of the auxiliary extrusion plate 23 away from the auxiliary translation barrel 13 is fixedly connected with a third spring 24 arranged at the inner side of the auxiliary lifting barrel 12;

[0049] When the auxiliary translation barrel 13 is driven by external force, the auxiliary extrusion plate 23 rigidly connected with the auxiliary translation barrel 13 will be displaced synchronously. In this process, the auxiliary extrusion plate 23 will compress the third spring 24, so that the third spring 24 is elastically deformed and stores potential energy. Once the external force is removed, the third spring 24 immediately releases the stored elastic potential energy, and pushes the auxiliary extrusion plate 23 to move reversely by the restoring force, thereby driving the auxiliary translation barrel 13 to reset accurately, and ensuring that the assembly always maintains the initial working state.

[0050] Please refer to Figures 2 to 7 The bottom end of the last short partition plate 5 from top to bottom protrudes a lug slidably connected in the corresponding partition cylinder 4, the bottom end of the outer circumferential surface of the partition cylinder 4 is uniformly provided with a first mounting groove 18, a plurality of lugs are slidably connected in the corresponding first mounting grooves 18, and one side of the lug is fixedly connected with a first spring 17 arranged at the side surface of the first mounting groove 18, wherein the lug protruding on the short partition plate 5 abutting with the bottom end of the driving rod 3 is slidably connected on the inner circumferential surface of the corresponding partition cylinder 4 (at the same time, the first mounting groove 18 matched with the lug is also formed on the inner circumferential surface of the corresponding partition cylinder 4), and the lug protruding on the short partition plate 5 from top to bottom and not abutting with the driving rod 3 is slidably connected on the outer circumferential surface of the corresponding partition cylinder 4.

[0051] When the rotation speed of the driven plate 6 increases, the extrusion plate 7 in the driving cavity 9 moves outward due to the increase of centrifugal force, and generates a radial thrust on the water medium in the cavity. With the increase of water pressure, the auxiliary lifting barrel 12 slides upward in the support cylinder 10 under the action of hydrostatic pressure, and drives the auxiliary push plate 14 to move horizontally synchronously through mechanical linkage. During the rotation of the driven plate 6, when the auxiliary push plate 14 rises to a certain height with the lifting barrel, the front end of the auxiliary push plate 14 collides with the auxiliary baffle 22 at the bottom end of the short partition plate 5, forcing the auxiliary baffle 22 to drive the whole set of short partition plates 5 to bend periodically around the partition cylinder 4.

[0052] At the moment of collision, the auxiliary push plate 14 rotates around the hinge point of the auxiliary push plate 14 and the auxiliary push plate 13 due to the reaction force of the auxiliary baffle 22, causing the connected reset torsional spring to be elastically twisted; at the same time, the transverse movement of the auxiliary push plate 13 compresses the third spring 24 and stores potential energy. When the driven plate 6 drives the auxiliary push plate 14 to rotate past the critical point of the auxiliary baffle 22, the elastic potential energy released by the third spring 24 synchronously drives the auxiliary push plate 13 to reset, so that the whole pushing mechanism returns to the standby state;

[0053] The third spring 24 can promote the bending of the whole set of short partition plates 5 for a longer time, because the third spring 24 and the auxiliary extrusion plate 23 can compensate the distance of the auxiliary lifting barrel 12 on the auxiliary push plate 13, thereby increasing the bending time of the whole set of short partition plates 5.

[0054] The core of this dynamic adjustment mechanism is that the higher the rotation speed of the driven plate 6, the greater the centrifugal force of the extrusion plate 7 (positively correlated with the square of the rotation speed), and the stronger the thrust transmitted to the auxiliary lifting barrel 12 through the water medium, and the longer the extension length of the auxiliary push plate 14 and the bending amplitude of the short partition plate 5. When the high-speed exhaust gas passes through the denitration tower, the periodic bending of the short partition plate 5 actively creates airflow disturbance, and forcibly induces vortex and backwash effect, significantly prolonging the actual residence time of the gas in the annular flow channel. This self-adaptive adjustment feature dynamically matches the disturbance intensity and the exhaust gas flow rate - the faster the flow rate, the longer the force arm of the push plate acting on the baffle, the greater the bending angle of the whole set of short partition plates 5, and the higher the degree of airflow turbulence, thereby effectively compensating for the problem of insufficient reaction time at high flow rate, and ensuring stable denitration efficiency.

[0055] Example Three

[0056] Although the above-mentioned embodiment realizes the disturbance adjustment of high-speed gas flow by driving the long partition plate to "bend" through the rotation of the driven plate 6, in the extreme flow fluctuation condition, the vortex effect generated by mechanical bending alone still has room for improvement in the inhibition effect on the exhaust gas flow speed, especially the limited axial residence time gain in the vertical flow channel. In order to further strengthen the gas retention effect and build a multi-dimensional flow field disturbance system, this embodiment is invented.

[0057] Please refer to Figures 1 to 9 On the basis of the above-mentioned embodiment, the technical solution adopted includes that the short partition plate 5 is provided with a backflush channel 21 on one side, and the top end of the backflush channel 21 penetrates the upper surface of the short partition plate 5;

[0058] When the upper and lower adjacent short partition plates 5 are dislocated due to external force, the air inlet at the top end of the backflush channel 21 is opened, and part of the high-speed exhaust gas cuts into the backflush channel 21 through the air inlet. Based on the one-way flow characteristic of the Tesla valve, the gas changes momentum when flowing through the internal curved channel, and forms a high-speed jet flow in the opposite direction of the main flow when being sprayed out from the bottom end. The backflush jet flow directly collides with the high-speed exhaust gas in the main flow channel, significantly reduces the axial flow speed through momentum exchange, and induces spiral turbulence in the flow channel. The backflush channel 21 can significantly improve the average residence time of gas in the straight channel, and does not need additional power driving. Only through mechanical dislocation triggering passive backflush effect, efficient flow retention and mixing enhancement of high-speed exhaust gas can be realized.

[0059] In summary, when the nitration exhaust gas denitration treatment device is in use, the exhaust gas is introduced from the gathering cylinder at the top of the denitration tower 1, and then flows into the flow-through cylinder 2 under the guiding effect. The rotation of the driving fan in the flow-through cylinder 2 is driven by the exhaust gas flow, the driving fan shaft drives all the driving rods 3 and the driven plate 6 to rotate synchronously through a driving rod 3, the partition cylinder 4 and the long partition plate divide the exhaust gas into the straight channels in the multiple annular flow channels, and the spray head at the bottom of the inner wall of the flow-through cylinder 2 atomizes and sprays the urea water solution and mixes with the exhaust gas preliminarily, and then enters the catalytic reaction area. In the running mode of the first embodiment, when the driven plate 6 rotates with the driving rod 3, the evenly arranged communication ports 15 on the surface of the driven plate 6 periodically connect or block the corresponding interfaces of the upper and lower straight channels, forming a pulse flow of "acceleration penetration-vortex retention". When the communication ports 15 are aligned, the exhaust gas penetrates the straight channel at high speed, and when the driven plate 6 rotates away, the exhaust gas forms a backflow vortex due to flow obstruction and under the action of the arc-shaped groove 16, which prolongs the residence time of the gas on the surface of the SCR catalyst, and realizes the self-adaptive adjustment of the rotation speed of the driven plate 6 and the flow speed of the exhaust gas.

[0060] When the exhaust gas flow rate increases significantly, the dynamic adjustment mechanism of embodiment two is started, the rotating speed of the driven plate 6 is increased, the extrusion plate 7 in the driving cavity 9 extrudes the water medium in the cavity due to the increase of the centrifugal force, the hydraulic transmission promotes the auxiliary lifting barrel 12 to slide upward in the supporting cylinder 10, drives the auxiliary translation barrel 13 and the auxiliary push plate 14 to move synchronously, the front end of the auxiliary push plate 14 collides with the auxiliary baffle 22 at the bottom end of the short partition plate 5, forces the whole set of short partition plates 5 to periodically bend around the partition cylinder 4, the bending amplitude increases with the square of the rotating speed, the auxiliary moving plates 19 between the upper and lower adjacent short partition plates 5 store and release elastic potential energy when sliding relative to each other, and the stability of the bending action and the reset accuracy are ensured, and the airflow disturbance is strengthened through mechanical deformation;

[0061] Meanwhile, under high flow rate working conditions, the backflush channel 21 of embodiment three plays a role, when the short partition plate 5 is dislocated due to external force, the high-speed exhaust gas cuts into the internal curved path flow channel in the form of a Tesla valve structure, uses fluid inertia to generate a high-speed jet flow in the opposite direction of the main flow, reduces the axial flow rate through momentum exchange and induces spiral turbulence, and greatly improves the average residence time of the gas in the straight channel. The nitration exhaust gas denitration treatment device ensures stable denitration efficiency through the synergistic effect of the three-level regulation system, i.e., the flow field pulsation of embodiment one, the structure dynamics of embodiment two, and the energy dissipation of embodiment three, does not need a complex electric control system, completely relies on the kinetic energy of the exhaust gas to drive the mechanical linkage mechanism, realizes passive intelligent adjustment of “flow rate sensing-disturbance self-adaptation-efficiency self-maintenance”, and has the advantages of compact structure, low operation and maintenance cost, strong impact load resistance and the like.

[0062] After the above treatment, the purified gas is finally discharged in order from the gas outlet at the bottom of the denitration tower 1 and smoothly enters the subsequent process treatment link, ensuring that the entire denitration process still operates efficiently and stably under variable flow conditions.

[0063] It should be noted that in the description of the present application, the terms “center”, “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inner”, “outer” and the like indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms “first”, “second”, “third” are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0064] In addition, it needs to be explained that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0065] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A nitration off-gas denitration treatment device comprising a denitration tower (1), characterized in that: The denitration tower (1) is provided with a plurality of driving rods (3) capable of changing the rotating speed according to the flow speed of the exhaust gas, a plurality of separation cylinders (4) capable of separating the space in the denitration tower (1) into a plurality of annular flow channels are sleeved on the driving rods (3), and the annular flow channels are provided with SCR catalysts, and a driven plate (6) capable of rotating synchronously with the driving rods (3) is arranged between the upper and lower adjacent separation cylinders (4), a plurality of long separation plates capable of separating the annular flow channels into a plurality of straight channels are arranged in each annular flow channel, a plurality of communication openings (15) capable of intermittently connecting the upper and lower adjacent straight channels are uniformly arranged on the upper surface of the driven plate (6), and a plurality of arc-shaped grooves (16) are uniformly arranged on the upper surface of the driven plate (6). The separation cylinders (4) sleeved together are fixedly connected through the long separation plates, and the separation cylinders (4) attached to the inner wall of the denitration tower (1) are fixedly connected to the inner wall of the denitration tower (1), and the centers of the upper and lower surfaces of the driven plate (6) are fixedly connected to the corresponding driving rods (3). Each long separation plate comprises a plurality of short separation plates (5) sequentially abutting from top to bottom, the first short separation plate (5) from top to bottom is fixedly connected to the corresponding separation cylinder (4), and the last short separation plate (5) from top to bottom is slidably connected to the bottom end of the corresponding separation cylinder (4), and a stabilizing component is arranged between the short separation plates (5) abutting each other, and a plurality of poking components capable of enabling the short separation plates (5) to move circumferentially in the annular flow channel are arranged on the upper surface of the driven plate (6). When the driven plate (6) rotates synchronously and rapidly with the increasing flow speed of the exhaust gas, the high-frequency on-off of the communication openings (15) on the surface of the driven plate (6) to the upper and lower straight channels will form a "speed-up-retardation" pulse flow of the exhaust gas in the straight channels: when the communication openings (15) are aligned, the exhaust gas penetrates the straight channels at high speed and accelerates, and when the communication openings (15) are turned away, the flow of the exhaust gas is blocked and forms a backflow vortex under the action of the curved surface structure of the arc-shaped grooves (16), forcing the gas to stay and fully contact with the SCR catalyst.

2. The device for treating exhaust gas from nitration according to claim 1, characterized in that: A flow-through cylinder (2) is fixedly installed on the top of the inner circumferential surface of the denitration tower (1), and the top of the flow-through cylinder (2) is provided with an accumulation cylinder capable of accumulating the exhaust gas to the flow-through cylinder (2), a driving fan driven by the flow of the exhaust gas is arranged in the flow-through cylinder (2), and the top end of the first driving rod (3) from top to bottom is fixedly connected to the rotating shaft of the driving fan.

3. The device for treating exhaust gas from nitration according to claim 2, characterized in that: The stabilizing component comprises an auxiliary moving plate (19) fixedly connected to the top end of the short separation plate (5), a second installation groove is arranged on the lower surface of the short separation plate (5), and the auxiliary moving plate (19) is slidably connected in the corresponding second installation groove, and one side of the auxiliary moving plate (19) is fixedly connected to a second spring (20) arranged on one side of the second installation groove.

4. The device for treating the denitration exhaust gas according to claim 3, characterized in that: The toggle component includes a support cylinder (10) fixedly connected to the upper surface of a driven plate (6), a plurality of drive cavities (9) are uniformly formed in the driven plate (6) and correspond to the support cylinder (10) one by one and are in communication, an auxiliary lifting barrel (12) is slidably connected to the inner wall of the support cylinder (10), the lower surface of the auxiliary lifting barrel (12) is fixedly connected to an elastic cylinder (11) arranged at the bottom end of the inner wall of the support cylinder (10), the inner wall of the auxiliary lifting barrel (12) is provided with an auxiliary translation barrel (13) capable of moving along the length direction of the auxiliary lifting barrel (12), the inner wall of the auxiliary translation barrel (13) is rotatably connected to an auxiliary push plate (14), a reset torsion spring is arranged at the connection position of the auxiliary push plate (14) and the auxiliary translation barrel (13), one end of an extrusion plate (7) is slidably connected to the end of the drive cavity (9) away from the support cylinder (10), one end of a first tension spring (8) is fixedly connected to the side surface of the drive cavity (9) and away from the support cylinder (10), and the lower surface of the last short partition plate (5) from top to bottom is fixedly connected to an auxiliary baffle (22).

5. The device for treating exhaust gas from nitration according to claim 4, characterized in that: One side of the auxiliary translation barrel (13) is fixedly connected to an auxiliary extrusion plate (23), one end of the auxiliary extrusion plate (23) away from the auxiliary translation barrel (13) is fixedly connected to a third spring (24) arranged at the inner side surface of the auxiliary lifting barrel (12).

6. The nitric oxide exhaust gas deNOx treatment device according to claim 5, characterized by: The bottom end of the last short partition plate (5) from top to bottom is protruded with a protruding block slidably connected to the corresponding partition cylinder (4), the bottom end of the outer circumferential surface of the partition cylinder (4) is uniformly provided with a first mounting groove (18), a plurality of protruding blocks are slidably connected to the corresponding first mounting grooves (18), and one side of the protruding block is fixedly connected to a first spring (17) arranged at the side surface of the first mounting groove (18).

7. The nitric oxide exhaust gas deNOx treatment device according to claim 6, characterized by: One side of the short partition plate (5) is provided with a back flushing channel (21), and the top end of the back flushing channel (21) penetrates through the upper surface of the short partition plate (5).

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