Mixing mechanism and smoke exhaust pipeline

Abstract

The utility model relates to the technical field of flue gas mixing treatment, in particular to a mixing mechanism and a smoke exhaust pipeline, which comprise a mixing unit, the mixing mechanism consists of a plurality of groups of first bias plate components and a plurality of groups of second bias plate components, the cross section of a flue is divided into a plurality of flue mixing areas by the mixing mechanism, and the flue mixing areas are communicated with the first bias plate components and the second bias plate components. And each flue mixing area is provided with a bias plate assembly. The flue gas mixing device has the beneficial effects that after the first bias flow plate assemblies and the second bias flow plate assemblies are arranged in two groups at intervals, the concentrations of flue gas components in the subareas are uniformly mixed, and meanwhile, four flue mixing areas K can be formed. Measurement representativeness of measuring points is improved, the number of partitions is remarkably reduced, and therefore the number of adjusting valves and flue gas component measuring points is reduced, investment cost is reduced, and adjusting quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas mixing treatment, in particular to a mixing mechanism and a smoke exhaust pipe. Background Technique

[0002] Flue gas mixing is an important step in improving flue gas treatment. Especially in the SCR system, the existing conventional SCR system's ammonia injection and mixing technology installs an ammonia injection grid that can manually adjust the ammonia injection amount in each partition across the entire flue cross-section, and then uses a static mixer to promote the mixing of ammonia and flue gas. This method requires a relatively uniform and stable NOx distribution at the SCR inlet. The opening degrees of the manual regulating valves are adjusted according to the NOx distribution at the SCR inlet to control the amount of reducing agent injected into each partition. The deficiencies of this method are as follows: 1. The NOx distribution at the SCR inlet often has a large deviation due to differences in combustion conditions under different working conditions, and the distribution law is also unstable. 2. After the opening degrees of the manual regulating valves of the ammonia injection grid are optimized and adjusted under a certain working condition, the amount of reducing agent injected into each partition is fixed. When the NOx distribution at its inlet changes greatly, it will be difficult to achieve the required mixing of the reducing agent and NOx. 3. With the promulgation and implementation of ultra-low emission environmental protection regulations, the conventional SCR is more sensitive to the deviation of the NOx distribution at the inlet, and it is more likely to cause local ammonia overdose and escape, threatening the safe and reliable operation of subsequent equipment.

[0003] The prior art publication number CN212999325U provides a flue duct partition mixer. The cross-section of the flue duct is sequentially divided into several partitions, and a flow deviation device is arranged in each partition. Through the flow deviation device, the flue gas rotates and crosses in the partition for mixing. Compared with the prior art's three-piece flow deviation plate in a row with the opposite inclination direction, on the basis of having six groups, the present utility model makes improvements by adding a second mixing unit arranged in a mirror image and different arrangement methods, improving the mixing effect of the flue gas during rotation and crossing to achieve more uniform and sufficient mixing of each component in the flue gas within a larger cross-section. Content of the Utility Model

[0004] In view of the problems in the above or the prior art that the large number of partitions leads to a large number of flue gas component measuring points and regulating valves, not only the investment cost is high, but also the measurement period is long, the response time is long, and the regulation quality is poor, the present utility model is proposed.

[0005] Therefore, the purpose of the present utility model is to provide a mixing mechanism.

[0006] To solve the above technical problems, the present utility model provides the following technical solution: a mixing unit, including a bearing unit and a first mixing unit and a second mixing unit arranged in the bearing unit, the first mixing unit and the second mixing unit are arranged in a mirror image;

[0007] Among them, the first mixing unit and the second mixing unit have the same structure.

[0008] As a preferred solution of the mixing mechanism of the present utility model, wherein: the first mixing unit includes a first flow deviation component and a second flow deviation component arranged in the opposite direction to the first flow deviation component;

[0009] Among them, the first flow deviation component and the second flow deviation component have the same structure.

[0010] As a preferred solution of the mixing mechanism of the present utility model, wherein: the first flow deviation component includes a fixed rod and a flow deviation plate fixedly connected to the outer surface of the fixed rod;

[0011] Among them, at least two flow deviation plates are provided;

[0012] Among them, the flow deviation plates are equally spaced and penetrated by the fixed rod.

[0013] As a preferred solution of the mixing mechanism of the present utility model, wherein: the flow deviation plate forms an inclination angle with the axis of the fixed rod;

[0014] Among them, the inclination angle can be set to 1° to 89°.

[0015] As a preferred solution of the mixing mechanism of the present utility model, wherein: the shape of the flow deviation plate is circular, oval, triangular or n-sided, and preferably circular.

[0016] As a preferred solution of the mixing mechanism of the present utility model, wherein: four groups of the first mixing unit and the second mixing unit are evenly distributed in the same horizontal plane of the bearing unit.

[0017] As a preferred solution of the mixing mechanism of the present utility model, wherein: the first mixing unit and the second mixing unit are arranged in at least one layer along the smoke flow direction in the bearing unit;

[0018] Among them, the first set of first flow deviation components are spaced from two adjacent sets of second flow deviation components of the first and second groups, then two adjacent sets of first flow deviation components of the second and third groups are arranged, then two adjacent sets of second flow deviation components of the third and fourth groups are arranged, and finally the fourth set of the first flow deviation components are arranged to form a complete mixing unit.

[0019] As a preferred solution of the mixing mechanism of the present utility model, wherein: the first mixing unit and the second mixing unit can be set to one layer or multiple layers according to the flue gas mixing effect.

[0020] The beneficial effects of the mixing mechanism of the present utility model: After the first mixing unit and the second mixing unit are arranged in a mirror image, the flue gas in the flue is mixed in a staggered manner, and the mixing effect is better than that of the prior art. The mixing effect of the rotating cross of the flue gas is improved to achieve more uniform mixing of each component in the flue gas within a larger cross-section.

[0021] In view of the actual use process, there is also the problem that the fixing rod is not convenient to install and fix.

[0022] Therefore, another object of the present utility model is to provide a smoke exhaust pipe.

[0023] To solve the above technical problems, the present utility model also provides the following technical solution: A smoke exhaust pipe includes,

[0024] A smoke exhaust pipe, which includes a pipe and a fixing component arranged on the outer surface of the mixing unit.

[0025] As a preferred scheme of the smoke exhaust pipe of the present utility model, wherein: The fixing component includes a base fixedly installed on the inner wall of the pipe by screws, an elastic buckle fixedly connected to the surface of the base, and a fastening screw threadedly connected to the surface of the elastic buckle and touching the surface of the first fixing rod.

[0026] As a preferred scheme of the smoke exhaust pipe of the present utility model, wherein: Two of the fixing components are symmetrically arranged on the left and right as a group, and the number thereof is set according to the number of fixing rods.

[0027] The beneficial effects of the smoke exhaust pipe of the present utility model: Through the setting of the fixing component, it is convenient for the deflection plate component to be quickly and accurately installed on the inner wall of the pipe, and the installation is firm. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings. Among them:

[0029] Figure 1 It is a partial schematic diagram of the present utility model.

[0030] Figure 2 It is the front view of the present utility model.

[0031] Figure 3 It is the cross-sectional view of the present utility model.

[0032] Figure 4 It is the schematic diagram of the fixing component of the present utility model.

[0033] Figure 5 This is a schematic diagram of another perspective of the fixing component of the present utility model. Detailed implementation manners

[0034] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will describe the detailed implementation manners of the present utility model with reference to the accompanying drawings of the specification.

[0035] In the following description, many specific details are set forth to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0036] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that can be included in at least one implementation manner of the present utility model. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that excludes other embodiments.

[0037] Embodiment 1

[0038] Referring to Figures 1 to 5 , this is the first embodiment of the present utility model, and this embodiment provides a mixing mechanism.

[0039] Specifically, the mixing unit 100 includes a carrier unit 101, a first mixing unit 102, and a second mixing unit 103 disposed within the carrier unit 101. The first mixing unit 102 and the second mixing unit 103 are mirror-symmetrically arranged. An ammonia injection grid for manually adjusting the ammonia injection amount in each zone is installed in the flue. When ammonia is ejected, it will be mixed with the flue gas;

[0040] Among them, the first mixing unit 102 and the second mixing unit 103 have the same structure.

[0041] Furthermore, the first mixing unit 102 includes a first flow deflection component 102a and a second flow deflection component 102b disposed in the opposite direction to the first flow deflection component 102a;

[0042] Among them, the first flow deflection component 102a and the second flow deflection component 102b have the same structure, and the material can be selected from Q355B and NM400, and NM400 is preferably used.

[0043] Even further, the first flow deflection plate assembly 101 includes that the first flow deflection component 102a includes a fixed rod 102a-2 and a flow deflection plate 102a-1 fixedly connected to the outer surface of the fixed rod 102a-2;

[0044] Among them, the shape of the bias flow plate 102a-1 can be circular, oval, triangular or polygonal, preferably circular, and at least two are provided.

[0045] Among them, the bias flow plates 102a-1 are penetrated by the fixing rods 102a-2 at equal intervals.

[0046] More preferably, the bias flow plate 102a-1 forms an inclination angle with the axis of the fixing rod 102a-2.

[0047] Among them, the inclination angle can be set to 1° to 89°, preferably 45°.

[0048] The flue gas and ammonia pass through the bias flow plate 102a-1, changing the flow direction, and at this time the flue gas and ammonia will be mixed.

[0049] During use, the flue gas enters the pipeline 201. At this time, the ammonia injection grid installed in the flue will inject ammonia to mix with the flue gas, and the mixture will rise through the flue. When the mixed gas passes through the bias flow plate 102a-1, the gas flow direction will be changed. Under the action of the first bias component 102a composed of multiple bias flow plates 102a-1 and the reversely arranged second bias component 102b, the mixed gas will form a first mixing unit 102 composed of eight bias flow plates in the flue, and the mixed gas will rotate counterclockwise and rise. The mirror-image second mixing unit 103 will form a clockwise rotating and rising air flow. The air flow in the mixing unit forms a strong rotating mixture, and the air flows between the units are in a gear meshing state and are independent of each other, making the mixed gas mix more evenly, making the flue gas mix evenly to meet the requirements of the flue gas before and after ammonia injection in the conventional SCR system. Compared with the bias flow plates arranged in six rows in reverse and staggered and three pieces in the same direction in one row in the prior art, it can achieve a more uniform mixing effect, clearer zoning in the large-section flue, and improve the detection accuracy.

[0050] In summary, when the mixed gas passes through the bias flow plate 102a-1, the gas flow direction will be changed. The first mixing unit 102 formed by eight bias flow plates 102a-1 can rotate the gas upward in the counterclockwise direction, and the clockwise rotating and rising air flow formed by the mirror-image second mixing unit 103 forms a rotating cross mixture, making the gas mix more evenly.

[0051] Embodiment 2

[0052] Refer to Figures 1 to 5 , which is the second embodiment of the present invention. Different from the previous embodiment, every four adjacent bias flow plates 102a-1 in the first mixing unit 102 can form a square mixing unit.

[0053] Furthermore, when the mixed gas passes through this square mixing unit, it can also form a clockwise rotating and rising air flow and a counterclockwise rotating and rising air flow, making the flue gas rotate and cross-mix.

[0054] Among them, within the second mixing unit 103b, rotational upward airflows with opposite rotational directions are formed.

[0055] During use, when the mixed gas passes through the square mixing unit composed of four adjacent flow deflectors 102a-1, a rotational upward airflow will be formed separately. When passing through the first mixing unit 102 and the second mixing unit 103 arranged in a mirror image, multiple rotational upward airflows in different directions will be formed, making the mixing more uniform.

[0056] In summary, by passing the mixed gas through multiple groups of square mixing units to form upward airflows with different rotational directions, when the mixed gas rotates upward, the cross-mixing is more uniform. The airflows in the mixing units rotate strongly for mixing, and the airflows between the units are in a gear meshing state and are independent of each other.

[0057] Embodiment 3

[0058] Referring to Figures 1 to 5 , this is the second embodiment of the present utility model. Different from the previous embodiment, this embodiment provides the installation format of the flow deflectors within the mixing unit 100.

[0059] Specifically, four groups of the first mixing unit 102 and the second mixing unit 103 are evenly distributed and arranged in the same horizontal plane of the bearing unit 101;

[0060] Among them, the first flow deflector assembly 102a and the second flow deflector assembly 102b are parallel to each other, and the shape of the flow deflector 102a-1 is circular, oval, triangular or n-sided, preferably circular.

[0061] Further, the first group of the first flow deflector assembly 102a is spaced apart from two adjacent first and second groups of the second flow deflector assemblies 102b, then two adjacent second and third groups of the first flow deflector assemblies 102a are arranged, then two adjacent third and fourth groups of the second flow deflector assemblies 102b are arranged, and finally the fourth group of the first flow deflector assembly 102a is arranged to form a complete mixing mechanism.

[0062] Among them, according to the change in the size of the flue, the number of groups of the flow deflector assemblies can be increased or decreased.

[0063] Further, the first mixing unit 102 and the second mixing unit 103 are arranged in at least one layer along the flue gas flow direction within the bearing unit 101.

[0064] During installation, the first bias flow component 102a and the second bias flow component 102b are installed in two groups at the same interval. At this time, the rotational upward airflows formed by the first mixing unit 102 of the second group and the mixing unit 103 of the second group are opposite, that is, the first mixing unit 102 of the second group forms a counterclockwise rotational upward airflow, and the mixing unit 103 of the second group forms a clockwise rotational upward airflow. Therefore, the airflows formed by the third and fourth groups of mixing units are also opposite to each other. Under the action of multiple groups of mixing units in different directions, multiple groups of airflows with different rotational directions are formed for the mixed flue gas. The airflows in the mixing units rotate strongly and mix, and the airflows between the units are in a gear meshing state and are independent of each other.

[0065] In summary, by setting two groups of the first bias flow component 102a and the second bias flow component 102b at the same interval to form multiple groups of mixing units, when the mixed gas passes through multiple groups of mixing units, multiple groups of rotational upward airflows in different directions will be formed, making the mixing effect more uniform, and the cross-mixing effect of the mixed flue gas is greater than the previous two

[0066] Embodiment

[0067] Embodiment 4

[0068] Refer to Figures 1 to 5 , which is the third embodiment of the present utility model. Different from the previous embodiment, this embodiment provides an exhaust pipe 200.

[0069] Specifically, the exhaust pipe 200 includes a pipe 201 and a fixing component 202 provided on the outer surface of the mixing unit 100.

[0070] Furthermore, the fixing component 202 includes a base 202a fixedly installed on the inner wall of the pipe 201 by screws, an elastic buckle 202b fixedly connected to the surface of the base 202a, and a fastening screw 202c threadedly connected to the surface of the elastic buckle 202b and touching the surface of the first fixing rod 101c.

[0071] It should be noted that two fixing components 202 are symmetrically arranged on the left and right as a group, and the number thereof is set according to the number of fixing rods 102a-2.

[0072] Among them, the pipe 201 can replace the bearing unit 101.

[0073] In use, first fix the base 202a on the inner wall of the pipe 201 by screws. The number of installations depends on the size of the pipe 201 and the size of the flow deflection plate 102a-1. After the base 202a is installed, embed the fixing rod 102a-2 into the elastic buckle 202b, and finally tighten the fastening screw 202c to lock the fixing rod 102a-2. Repeat the above steps to install multiple groups of the first flow deflection components 102a and the second flow deflection components 102b according to the installation format of Embodiment 3 to form a complete mixing mechanism 100, and complete the installation of the mixing mechanism 100 simply and quickly.

[0074] In summary, through the setting of the base 202a, the installation efficiency of the flow deflection components is significantly improved, which is convenient for the disassembly, repair and cleaning of the flow deflection components, and the production efficiency is improved.

[0075] Importantly, it should be noted that the structures and arrangements of the present application shown in multiple different exemplary embodiments are only illustrative. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should easily understand that many modifications are possible on the premise of substantially not deviating from the novel teachings and advantages of the subject matter described in this application (for example, the sizes, scales, structures, shapes and proportions of various components, and parameter values (such as temperature, pressure, etc.), installation arrangements, use of materials, changes in color, orientation, etc.). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature, number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover the structure that performs the recited function herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangements of the exemplary embodiments without departing from the scope of the present invention. Therefore, the present invention is not limited to specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0076] In addition, in order to provide a concise description of the exemplary embodiments, not all features of the actual embodiments may be described (i.e., those features that are not relevant to the currently considered best mode of implementing the present invention or those features that are not relevant to the implementation of the present invention).

[0077] It should be understood that, during the development of any actual implementation, such as in any engineering or design project, a large number of specific implementation decisions can be made. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, without undue experimentation, such development efforts will be routine work of design, manufacturing, and production.

[0078] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A hybrid mechanism, characterized in that: Comprising, A mixing unit (100), comprising a carrier unit (101), a first mixing unit (102) and a second mixing unit (103) disposed within the carrier unit (101), wherein the first mixing unit (102) and the second mixing unit (103) are mirror - set; Wherein, the first mixing unit (102) and the second mixing unit (103) have the same structure.

2. The mixing mechanism according to claim 1, wherein: The first mixing unit (102) includes a first biasing component (102a) and a second biasing component (102b) disposed in the opposite direction to the first biasing component (102a); Wherein, the first biasing component (102a) and the second biasing component (102b) have the same structure.

3. The mixing mechanism according to claim 2, wherein: The first biasing component (102a) includes a fixing rod (102a - 2) and a biasing plate (102a - 1) fixedly connected to the outer surface of the fixing rod (102a - 2); Wherein, at least two biasing plates (102a - 1) are provided; Wherein, the biasing plates (102a - 1) are equally spaced and penetrated by the fixing rod (102a - 2).

4. The mixing mechanism according to claim 3, wherein: The biasing plate (102a - 1) forms an inclination angle with the axis of the fixing rod (102a - 2); Wherein, the inclination angle can be set to 1° - 89°.

5. The hybrid mechanism according to claim 3 or 4, characterized in that: The shape of the biasing plate (102a - 1) is circular, elliptical, triangular or n - sided.

6. The mixing mechanism according to claim 5, characterized in that: Four groups of the first mixing unit (102) and the second mixing unit (103) are evenly distributed in the same horizontal plane of the carrier unit (101).

7. The mixing mechanism according to claim 4 or 6, characterized in that: The first mixing unit (102) and the second mixing unit (103) are arranged in at least one layer along the smoke flow direction within the carrier unit (101).

8. A smoke exhaust duct, characterized in that: Comprising the mixing mechanism according to any one of claims 1 - 7, including an exhaust pipe (200) which includes a pipe (201) and a fixing component (202) disposed on the outer surface of the mixing unit (100).

9. The exhaust duct according to claim 8, characterized in that: The fixing component (202) includes a base (202a) fixedly installed on the inner wall of the pipe (201) by screws, an elastic buckle (202b) fixedly connected to the surface of the base (202a), and a fastening screw (202c) thread - connected to the surface of the elastic buckle (202b) and touching the surface of the first fixing rod (101c).

10. The smoke exhaust duct according to claim 9, characterized in that: Two fixing components (202) are symmetrically arranged left and right as a group, and the number thereof is set according to the number of fixing rods (102a - 2).

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