Ammonia gas and flue gas mixing anti-blocking device suitable for SCR denitration equipment
By designing the transverse mixing pipeline and spoiler structure in SCR denitrification equipment, the problems of uneven flue gas mixing and impurity blockage are solved, and more uniform ammonia flue gas mixing and removal of impurity particles are achieved, thus reducing the catalytic reactor The risk of blockage improves the denitrification effect.
Patent Information
- Application Number
- CN202421182056.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-28
AI Technical Summary
In existing SCR denitrification equipment, the fast flue gas flow rate leads to uneven mixing of ammonia and flue gas, and impurities containing larger particles are likely to clog the catalytic reactor, affecting the denitrification effect.
An ammonia flue gas mixing anti-blocking device including a transverse mixing pipeline, a plurality of spoilers and dust collecting boxes is designed. The spoiler is arranged at intervals along the extension direction of the pipe, inclined and connected to the mixing pipeline, and interferes with the spoiler. The flue gas flow and impurity particles collide, reduce the kinetic energy and fall into the dust collecting box, reducing the risk of catalytic reactor blockage.
By uniformly mixing ammonia and flue gas, the chance of blockage of the SCR catalytic reactor is reduced and the denitrification effect is improved.
Smart Images
Figure CN222342501U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of environmental protection equipment, and in particular relates to an ammonia and flue gas mixing anti-blocking device suitable for SCR denitration equipment. Background Art
[0002] The SCR process technology used in the treatment of nitrogen oxides in flue gas from cement kilns can stably meet the most stringent emission requirements. SCR is to install a catalytic reactor at the outlet of the cement kiln preheater, spray a reducing agent (such as ammonia or urea) in front of the reactor, and reduce nitrogen oxides in the flue gas to nitrogen and water under the action of a catalyst at an appropriate temperature (300-400°C).
[0003] However, there are still some problems with the existing SCR denitrification equipment: on the one hand, the flue gas flow speed in the flue gas duct is relatively fast, and ammonia and flue gas are prone to uneven mixing, which affects the denitrification effect; on the other hand, the flue gas usually contains some large particle impurities, which makes the SCR catalytic reactor easy to be blocked, which also affects the denitrification effect. Utility Model Content
[0004] The utility model provides an ammonia-gas-smoke mixing anti-blocking device suitable for SCR denitration equipment, aiming to solve the technical problems raised in the above-mentioned background technology.
[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide an ammonia flue gas mixing anti-blocking device suitable for SCR denitrification equipment, comprising:
[0006] A mixing pipe, arranged horizontally, for circulating ammonia and flue gas inside;
[0007] A plurality of spoilers are arranged in two rows and spaced apart in the mixing duct along the extending direction of the mixing duct, wherein the ends of two adjacent spoilers which are away from each other are respectively connected to the two sides of the mixing duct, and the other ends are spaced apart from the mixing duct, and the two adjacent spoilers overlap by a preset distance in the extending direction of the duct, and the spoilers are all inclined in the direction of smoke flow; and
[0008] The dust collecting box is arranged at the lower side of the plurality of spoilers, is connected and communicated with the mixing duct, and is used for collecting dust particles that fall due to collision with the spoilers.
[0009] In a possible implementation of the ammonia-flue gas mixing anti-blocking device applicable to the SCR denitration equipment provided by the utility model, a plurality of vertically extending grooves are provided on the side of the spoiler impacted by the flue gas.
[0010] In a possible implementation of the ammonia-flue gas mixing and blocking prevention device applicable to the SCR denitration equipment provided by the utility model, a buffer layer is provided on the side of the spoiler impacted by the flue gas.
[0011] In a possible implementation of the ammonia flue gas mixing and anti-blocking device suitable for SCR denitrification equipment provided by the utility model, the ends of the spoiler that are away from each other are rotatably connected to the mixing pipe, and the ammonia flue gas mixing and anti-blocking device suitable for SCR denitrification equipment also includes an angle adjustment component, which is connected to the mixing pipe, and the power output end is connected to the spoiler for adjusting the inclination angle of the spoiler.
[0012] In a possible implementation of the ammonia flue gas mixing anti-blocking device for SCR denitration equipment provided by the utility model, a rotating shaft is provided on the spoiler, the rotating shaft is fixedly connected to the spoiler, the upper end of the rotating shaft passes through the mixing pipe and rotates with the mixing pipe; the angle adjustment component includes:
[0013] A plurality of gears, corresponding to the spoilers one by one, the gears being arranged on the upper side of the mixing pipe and connected to the rotating shaft;
[0014] Two rows of teeth, arranged in parallel and at intervals, the two rows of teeth being respectively meshed with the gears on the two rows of spoilers; and
[0015] A driving assembly is connected to the mixing pipe, and a power output end is connected to the gear row, so as to drive the gear row to move and drive the gear to rotate.
[0016] In a possible implementation of the ammonia-flue gas mixing anti-blocking device applicable to the SCR denitration equipment provided by the utility model, the driving component includes:
[0017] A connecting frame connected to the two gear rows;
[0018] A screw rod passes through the connecting frame and is threadedly matched with the connecting frame, wherein the axis of the screw rod is parallel to the extending direction of the mixing pipe; and
[0019] The motor assembly is connected to the mixing pipe, and the power output end is connected to the screw rod, so as to drive the screw rod to rotate.
[0020] In a possible implementation of the ammonia flue gas mixing anti-blocking device suitable for SCR denitrification equipment provided by the utility model, the dust collecting box is pullable and arranged at the bottom of the mixing pipe, and a dust collecting window is opened in the mixing pipe at a position corresponding to the dust collecting box.
[0021] In a possible implementation of the ammonia-flue gas mixing anti-blocking device applicable to the SCR denitration equipment provided by the utility model, it also includes a shutter, which is arranged in the dust collecting window and connected to the mixing pipe.
[0022] The beneficial effect of the ammonia flue gas mixing and anti-blocking device suitable for SCR denitrification equipment provided by the utility model is: compared with the prior art, the ammonia flue gas mixing and anti-blocking device suitable for SCR denitrification equipment provided by the utility model, the flue gas mixed with ammonia flows through the mixing pipe, and after being disturbed by multiple spoilers, the mixing is more uniform. In this process, the impurity particles in the flue gas collide with the multiple spoilers, and the kinetic energy gradually decreases, and falls into the dust collecting box below, thereby greatly reducing the probability of the SCR catalytic reactor being blocked. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 A schematic diagram of the three-dimensional structure of an ammonia-flue gas mixing and blocking prevention device applicable to an SCR denitration device provided in an embodiment of the utility model;
[0024] Figure 2 A schematic diagram of the three-dimensional structure of the ammonia-gas-smoke mixing anti-blocking device for SCR denitration equipment provided by the embodiment of the utility model after removing a side plate;
[0025] Figure 3 for Figure 2 A magnified view of part A in FIG.
[0026] Description of reference numerals:
[0027] 10. Mixing duct; 21. Spoiler; 22. Buffer layer; 23. Groove;
[0028] 31. gear; 32. gear row; 33. connecting frame; 34. screw;
[0029] 35. Motor assembly; 40. Shutter; 50. Dust collection box. DETAILED DESCRIPTION
[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0033] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.
[0034] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.
[0035] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, and the spatially relative descriptions used here are interpreted accordingly.
[0036] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.
[0037] Please also read Figures 1 to 3 , the ammonia flue gas mixing and blocking prevention device for SCR denitration equipment provided by the utility model is now described. The ammonia flue gas mixing and blocking prevention device for SCR denitration equipment comprises a mixing pipe 10, a plurality of spoilers 21 and a dust collecting box 50. The mixing pipe 10 is arranged horizontally, and the inside is used to circulate ammonia and flue gas; the plurality of spoilers 21 are arranged in two rows and spaced in the mixing pipe 10 along the extension direction of the mixing pipe 10, and the ends of two adjacent spoilers 21 that are away from each other are respectively connected to the two sides of the mixing pipe 10, and the other ends are spaced from the mixing pipe 10, and the two adjacent spoilers 21 overlap a preset distance in the extension direction of the pipe, and the spoilers 21 are all inclined in the direction of flue gas flow; the dust collecting box 50 is arranged at the lower side of the plurality of spoilers 21, connected and communicated with the mixing pipe 10, and used to receive dust particles that fall due to collision with the spoilers 21.
[0038] It should be noted that the ammonia flue gas mixing anti-blocking device applicable to the SCR denitrification equipment provided in this embodiment cannot completely prevent the SCR catalytic reactor from being blocked, but can only reduce and alleviate the situation of the SCR catalytic reactor being blocked.
[0039] The beneficial effect of the ammonia flue gas mixing and anti-blocking device suitable for SCR denitrification equipment provided by the utility model is: compared with the prior art, the ammonia flue gas mixing and anti-blocking device suitable for SCR denitrification equipment provided by the utility model, the flue gas mixed with ammonia flows through the mixing pipe 10, and after being disturbed by multiple spoilers 21, the mixing is more uniform. In this process, the impurity particles in the flue gas collide with the multiple spoilers 21, and the kinetic energy gradually decreases, and falls into the dust collecting box 50 below, thereby greatly reducing the probability of the SCR catalytic reactor being blocked.
[0040] like Figure 2 and Figure 3 As shown, in a specific implementation of the ammonia flue gas mixing anti-blocking device suitable for SCR denitrification equipment provided by an embodiment of the utility model, a plurality of vertically extending grooves 23 are provided on the side of the spoiler 21 impacted by the flue gas, so as to increase the probability of intercepting impurity particles by the spoiler 21 when the flue gas impacts the spoiler 21, thereby further reducing the probability of the SCR catalytic reactor being blocked.
[0041] like Figure 2 and Figure 3 As shown, in a specific implementation of the ammonia flue gas mixing anti-blocking device suitable for SCR denitrification equipment provided by an embodiment of the utility model, a buffer layer 22 is provided on the side of the spoiler 21 impacted by the flue gas, so as to better absorb the kinetic energy of the impurity particles when the impurity particles collide with the spoiler 21, so that more impurity particles fall, and the probability of the SCR catalytic reactor being blocked is further reduced.
[0042] like Figure 1 and Figure 2 As shown, in a specific implementation of the ammonia flue gas mixing and anti-blocking device suitable for SCR denitrification equipment provided by an embodiment of the utility model, one end of the spoiler 21 that is away from each other is rotatably connected to the mixing pipe 10, and the ammonia flue gas mixing and anti-blocking device suitable for SCR denitrification equipment also includes an angle adjustment component, which is connected to the mixing pipe 10, and the power output end is connected to the spoiler 21, which is used to adjust the inclination angle of the spoiler 21, so as to adjust the inclination angle of the spoiler 21 according to actual conditions when needed, and adjust the flue gas flow rate and the degree of flue gas interference.
[0043] like Figure 1 and Figure 2As shown, in a specific implementation of the ammonia flue gas mixing anti-blocking device suitable for SCR denitrification equipment provided by an embodiment of the utility model, a rotating shaft is provided on the spoiler 21, the rotating shaft is fixedly connected to the spoiler 21, the upper end of the rotating shaft passes through the mixing pipe 10, and rotates with the mixing pipe 10; the angle adjustment component includes a plurality of gears 31, two gear rows 32 and a driving component, the plurality of gears 31 correspond to the spoiler 21 one by one, the gear 31 is arranged on the upper side of the mixing pipe 10, and is connected to the rotating shaft; the two gear rows 32 are parallel and spaced apart, and the two gear rows 32 are respectively meshed with the gears 31 on the two rows of spoilers 21; the driving component is connected to the mixing pipe 10, and the power output end is connected to the gear row 32, which is used to drive the gear row 32 to move and drive the gear 31 to rotate.
[0044] Specifically, Figure 1 and Figure 2 As shown, in a specific implementation of the ammonia flue gas mixing anti-blocking device suitable for SCR denitrification equipment provided by an embodiment of the utility model, the driving assembly includes a connecting frame 33, a screw 34 and a motor assembly 35, the connecting frame 33 is connected to the two gear rows 32; the screw 34 passes through the connecting frame 33 and is threadedly matched with the connecting frame 33, and the axis of the screw 34 is parallel to the extension direction of the mixing pipe 10; the motor assembly 35 is connected to the mixing pipe 10, and the power output end is connected to the screw 34 to drive the screw 34 to rotate.
[0045] When the tilt angle of the spoiler 21 needs to be adjusted, the motor assembly 35 drives the screw 34 to rotate, thereby driving the connecting frame 33 and the gear row 32 thereon to move, and the gear row 32 then drives all the gears 31 to rotate, thereby driving the spoiler 21 to rotate.
[0046] like Figure 1 and Figure 2 As shown, in a specific implementation of the ammonia flue gas mixing anti-blocking device suitable for SCR denitrification equipment provided by an embodiment of the utility model, the dust collecting box 50 can be pulled out and arranged at the bottom of the mixing pipe 10, and a dust collecting window is opened at the position of the mixing pipe 10 corresponding to the dust collecting box 50.
[0047] Further, such as Figure 1 and Figure 2 As shown, in a specific implementation of the ammonia flue gas mixing anti-blocking device suitable for SCR denitrification equipment provided by an embodiment of the utility model, it also includes a shutter 40, which is arranged in the dust collecting window and connected to the mixing pipe 10.
[0048] It should be noted that the shutter 40 adopts the existing electric shutter and can be completely closed. The shutter 40 is installed in the dust collection window opened below the mixing duct 10. On the one hand, it can effectively prevent the foreign particles fallen into the dust box 50 from being blown up again. On the other hand, when the dust box 50 needs to be cleaned, the dust collection window can be closed through the shutter 40, and then the dust box 50 can be pulled out.
[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An ammonia flue gas mixing and blocking prevention device suitable for SCR denitration equipment, characterized in that: include: A mixing pipe, arranged horizontally, for circulating ammonia and flue gas inside; A plurality of spoilers are arranged in two rows and spaced apart in the mixing duct along the extending direction of the mixing duct, wherein the ends of two adjacent spoilers which are away from each other are respectively connected to the two sides of the mixing duct, and the other ends are spaced apart from the mixing duct, and the two adjacent spoilers overlap by a preset distance in the extending direction of the duct, and the spoilers are all inclined in the direction of smoke flow; and The dust collecting box is arranged at the lower side of the plurality of spoilers, is connected and communicated with the mixing duct, and is used for collecting dust particles that fall due to collision with the spoilers.
2. The ammonia-gas-flue gas mixing and blocking prevention device for SCR denitration equipment according to claim 1, characterized in that: The side of the spoiler impacted by smoke is provided with a plurality of vertically extending grooves.
3. The ammonia-gas-flue gas mixing and blocking prevention device for SCR denitration equipment according to claim 1, characterized in that: The side of the spoiler impacted by smoke is provided with a buffer layer.
4. The ammonia-gas-flue gas mixing and blocking prevention device for SCR denitration equipment according to claim 1, characterized in that: The ends of the spoilers facing away from each other are rotatably connected to the mixing pipe. The ammonia flue gas mixing and blocking prevention device suitable for SCR denitrification equipment also includes an angle adjustment component, which is connected to the mixing pipe. The power output end is connected to the spoiler to adjust the inclination angle of the spoiler.
5. The ammonia-gas-flue gas mixing and blocking prevention device for SCR denitration equipment according to claim 4, characterized in that: The spoiler is provided with a rotating shaft, the rotating shaft is fixedly connected to the spoiler, the upper end of the rotating shaft passes through the mixing pipe and rotates with the mixing pipe; the angle adjustment component includes: A plurality of gears, corresponding to the spoilers one by one, the gears being arranged on the upper side of the mixing pipe and connected to the rotating shaft; Two rows of teeth, arranged in parallel and at intervals, the two rows of teeth being respectively meshed with the gears on the two rows of spoilers; and A driving assembly is connected to the mixing pipe, and a power output end is connected to the gear row, so as to drive the gear row to move and drive the gear to rotate.
6. The ammonia-gas-flue gas mixing and blocking prevention device applicable to SCR denitration equipment according to claim 5, characterized in that: The drive assembly comprises: A connecting frame connected to the two gear rows; A screw rod passes through the connecting frame and is threadedly matched with the connecting frame, wherein the axis of the screw rod is parallel to the extending direction of the mixing pipe; and The motor assembly is connected to the mixing pipe, and the power output end is connected to the screw rod, so as to drive the screw rod to rotate.
7. The ammonia-gas-flue gas mixing and blocking prevention device applicable to SCR denitration equipment according to claim 1, characterized in that: The dust collecting box is arranged at the bottom of the mixing pipe in a drawable manner, and a dust collecting window is provided at a position of the mixing pipe corresponding to the dust collecting box.
8. The ammonia-gas-flue gas mixing and blocking prevention device for SCR denitration equipment according to claim 7, characterized in that: It also includes a shutter, which is arranged in the dust collecting window and connected to the mixing pipe.