A hierarchical premixing adaptive cold-hot air mixing device

Abstract

The present application relates to the technical fields of thermal energy engineering and fluid mixing, and discloses a hierarchical premixing adaptive cold-hot air mixing device, which comprises a pipeline component, a hot air pipeline and a cold air pipeline, and a mixing component comprising a hot air partition plate, one side of the hot air partition plate being provided with a hot air passage, the present application uniformly distributes hot air into multiple hot air passages by arranging the hot air partition plate on the upper part of the mixing device, and a flow guide plate is further arranged in each passage to facilitate the uniform distribution of hot air along the height direction. This design can effectively promote the uniform mixing of cold-hot air medium, and the design of the self-adaptive expansion deformation plate is used to cope with the stress deformation problem caused by temperature difference on the mixing device, the expansion plate is connected with the flue bottom plate by plug welding at both ends, but there is a gap on both sides to allow it to deform freely with temperature changes. Such a design can absorb the deformation of the flow guide caused by temperature difference under actual working conditions, thereby ensuring the overall safety of the mixing device.

Description

Technical Field

[0001] This invention relates to the technical field of clutches, and more particularly to a graded premixed adaptive hot and cold air mixing device. Background Technology

[0002] In coal-fired power plants and other industrial applications, the mixing of hot and cold air media is a common and critical process. These processes typically involve uniformly mixing hot and cold air from different sources to meet the temperature uniformity requirements of subsequent process equipment. However, existing technologies for hot and cold air mixing present several significant problems: 1. In most cases, hot air ducts are directly connected to cold air ducts without a dedicated mixing device. This direct connection leads to severely uneven mixing, affecting the performance and efficiency of subsequent process equipment; 2. To address the aforementioned uneven mixing problem, some existing patents propose using mixers or baffles at the junction of the two media. While these devices can theoretically improve mixing, they have not been widely validated in practical applications. Furthermore, these static mixers often introduce significant system resistance, increasing energy consumption. More importantly, they fail to adequately consider the stress deformation caused by the temperature difference between the hot and cold air media on the mixing device, which could lead to device breakage or even duct rupture, threatening the safe operation of the system; 3. Cold air ducts typically have larger cross-sectional dimensions, while hot air ducts are relatively smaller. When hot air enters the cold air duct, the temperature difference between the two causes thermal expansion and contraction within the duct and mixing device. This stress deformation due to the temperature difference can damage the mixing device's structure, leading to safety hazards. 4. Because the deformation of the guide components caused by the temperature difference is not considered, existing mixing devices may pose serious safety risks in actual use. For example, a break in the mixing device could cause the flue to tear, resulting in media leakage, which not only affects production efficiency but may also lead to safety accidents. Summary of the Invention

[0003] In view of the problems existing in the above-mentioned staged premixed adaptive hot and cold air mixing device, the present invention is proposed.

[0004] Therefore, the purpose of this invention is to provide a staged premixed adaptive hot and cold air mixing device that can achieve pre-distribution and multi-stage premixing, effectively promoting the uniform mixing of hot and cold air media; it eliminates the need for a static mixer, resulting in low system resistance; and it absorbs the deformation of the guide components caused by temperature differences through the deformation of the expansion plate. This ensures the safety of mixers and other equipment during actual use, avoiding safety accidents caused by flue tearing and media leakage due to deformation.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A graded premixed adaptive hot and cold air mixing device includes a pipe component, including a hot air pipe and a cold air pipe, and a mixing component, including a hot air dividing plate located on one side of the hot air pipe, and a hot air channel installed on one side of the hot air dividing plate.

[0006] As a preferred embodiment of the graded premixed adaptive hot and cold air mixing device of the present invention, wherein: one side of the hot air duct is an inlet, and hot air enters the duct from the inlet; the other side of the hot air duct is an outlet, and hot air flows from the outlet to the subsequent duct.

[0007] In a preferred embodiment of the graded premixed adaptive hot and cold air mixing device of the present invention, the hot air channel is fixedly connected to the outlet of the hot air duct, and the hot air channel is provided in several parts.

[0008] As a preferred embodiment of the graded premixed adaptive hot and cold air mixing device of the present invention, wherein: the two side plates of the hot air channel are trapezoidal, the inclined side of the hot air channel is in the same direction as the flow of cold air, and a plurality of arc-shaped guide plates along the inclined surface of the trapezoid are fixedly connected inside each hot air channel.

[0009] As a preferred embodiment of the graded premixed adaptive hot and cold air mixing device of the present invention, each of the arc-shaped guide vanes is arranged in parallel, and each of the arc-shaped guide vanes is arranged at equal intervals along the trapezoidal slope of the hot air channel.

[0010] As a preferred embodiment of the graded premixed adaptive hot and cold air mixing device of the present invention, wherein: the hot air dividing plate is generally arched, a plurality of hot air dividing plates are provided, and the hot air dividing plate is fixedly connected to the side of the hot air channel near the hot air duct.

[0011] In a preferred embodiment of the graded premixed adaptive hot and cold air mixing device of the present invention, each of the hot air dividing plates has its two ends fixedly connected to the ends of the adjacent hot air channels.

[0012] In a preferred embodiment of the graded premixed adaptive hot and cold air mixing device of the present invention, the outer wall of the hot air channel is fixedly connected to the cold air duct, and the diameter of the cold air duct is greater than the sum of the diameters of all the hot air channels.

[0013] In a preferred embodiment of the graded premixed adaptive hot and cold air mixing device of the present invention, the cold air duct is arranged perpendicularly to the hot air duct, and the cold air flow direction of the cold air duct is from the opposite side of the trapezoidal hypotenuse of the hot air channel to the trapezoidal hypotenuse of the hot air channel.

[0014] In a preferred embodiment of the graded premixed adaptive hot and cold air mixing device of the present invention, one side of the hot air channel is fixedly connected to the pipe wall of the cold air duct through an adaptive expansion deformation plate.

[0015] The beneficial effects of this invention are as follows: This invention employs a pre-distribution and multi-stage premixing design. By setting a hot air dividing plate at the top of the mixing device, hot air is evenly distributed into multiple hot air channels. Each channel is also equipped with a guide plate to promote the uniform distribution of hot air along the height direction. This design can effectively promote the uniform mixing of hot and cold air media. The adaptive expansion deformation plate design addresses the stress deformation problem caused by temperature differences in the mixing device. The expansion plate is plugged and welded to the flue bottom plate at both ends, but gaps are left on both sides to allow it to deform freely with temperature changes. This design can absorb the deformation of the guide components caused by temperature differences under actual working conditions, thereby ensuring the overall safety of the mixing device and preventing safety accidents such as flue tearing or media leakage caused by deformation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0019] Figure 3 This is a diagram showing the effect of the present invention before the mixer is installed.

[0020] Figure 4 This is a diagram showing the effect of adding a mixer to the present invention.

[0021] In the picture:

[0022] 100. Piping components; 101. Hot air duct; 102. Cold air duct; 200. Mixing components; 201. Hot air divider; 202. Hot air passage; 202a. Arc-shaped guide plate; 202b. Adaptive expansion and deformation plate. Detailed Implementation

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0026] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0027] Example 1

[0028] Reference Figure 1 The first embodiment of the present invention provides a graded premixed adaptive hot and cold air mixing device. The device includes a pipe component 100, including a hot air pipe 101 and a cold air pipe 102, and a mixing component 200, including a hot air dividing plate 201 located on one side of the hot air pipe 101, and a hot air channel 202 installed on one side of the hot air dividing plate 201.

[0029] Specifically, one side of the hot air duct 101 is the inlet, from which hot air enters the duct. The other side of the hot air duct 101 is the outlet, from which hot air flows to the subsequent duct. The two ends of each hot air partition plate 201 are fixedly connected to the ends of the adjacent hot air channels 202.

[0030] In this process, the hot air medium first enters the mixing device through the hot air duct 101. At the top of the mixing device, the hot air divider 201 evenly distributes the hot air into multiple hot air channels 202. Each hot air channel 202 is equipped with a guide plate to ensure that the hot air is evenly distributed along the height direction. Subsequently, the hot air flows out from these hot air channels 202 and finally merges into the cold air duct 102, where it mixes with the cold air medium to achieve a uniform temperature.

[0031] Example 2

[0032] Reference Figures 1-2This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: the hot air channel 202 is fixedly connected to the outlet of the hot air duct 101, and several hot air channels 202 are provided. The two side plates of the hot air channel 202 are trapezoidal, and the inclined side of the hot air channel 202 is in the same direction as the flow of cold air. Several arc-shaped guide plates 202a along the inclined surface of the trapezoid are fixedly connected inside each hot air channel 202.

[0033] Furthermore, each arc-shaped guide plate 202a is arranged in parallel, and each arc-shaped guide plate 202a is arranged at equal intervals along the trapezoidal slope of the hot air channel 202. The hot air dividing plate 201 is arched in shape, and several hot air dividing plates 201 are provided. The hot air dividing plates 201 are fixedly connected to the side of the hot air channel 202 near the hot air pipe 101.

[0034] The hot air channels 202 are evenly distributed at the air outlets of the hot air duct 101, a layout that facilitates the uniform distribution of the hot air medium. Inside each hot air channel 202, several arc-shaped guide plates 202a are fixedly connected at equal intervals along the trapezoidal slope, and these guide plates are arranged in parallel. The purpose of this design is to enable the hot air medium to enter the cold air duct 102 in layers and evenly.

[0035] The arc-shaped guide plate 202a has one end parallel to the cold air duct 102 near the trapezoidal slope. When hot air flows out of the hot air channel 202, the arc-shaped guide plate 202a changes the direction of the hot air flow, aligning it with the flow direction of the cold air medium, thereby promoting effective mixing of the two media. The hot air dividing plate 201 is located between two adjacent hot air channels 202 and has an arched top, which helps the hot air medium flow smoothly from the hot air duct 101 into each hot air channel 202. This structural design ensures that the hot air medium can enter the cold air duct 102 uniformly and orderly, thus achieving a highly efficient mixing effect.

[0036] Example 3

[0037] Reference Figures 1-4 This is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that a cold air duct 102 is fixedly connected to the outer wall of the hot air duct 202, and the diameter of the cold air duct 102 is greater than the sum of the diameters of all the hot air ducts 202.

[0038] A hot air channel 202 is fixedly connected to one side wall of the cold air duct 102, and the entire hot air channel 202 is completely placed inside the cold air duct 102. The diameter of the cold air duct 102 is larger than the sum of the diameters of all the hot air channels 202. This design facilitates the effective mixing of hot air medium and cold air medium within the cold air duct 102.

[0039] Furthermore, the cold air duct 102 is set perpendicularly to the hot air duct 101. The cold air flow direction of the cold air duct 102 is from the opposite side of the trapezoidal inclined side of the hot air channel 202 to the trapezoidal inclined side of the hot air channel 202. One side of the hot air channel 202 is fixedly connected to the pipe wall of the cold air duct 102 through an adaptive expansion deformation plate 202b.

[0040] The design aligns the flow directions of the cold and hot air, allowing for more thorough contact and mixing when the two media meet. The hot air flows out of the hot air channel 202 and along the direction of the guide plate, while the cold air enters from the opposite direction. This consistent flow direction prevents disturbance between the two fluids, reducing their flow velocity and improving mixing uniformity.

[0041] By installing an adaptive expansion and deformation plate 202b on one side of the hot air duct 202 and fixing it to the wall of the cold air duct 102, deformation of the guide component caused by temperature changes can be absorbed during actual operation. The adaptive expansion and deformation plate 202b is designed to deform freely under temperature difference, preventing breakage of the mixing device or flue due to stress concentration. This not only protects the equipment itself but also avoids potential safety risks such as media leakage, improving the safety performance of the entire system.

[0042] In use, the hot air medium is connected to the cold air duct 102 through the hot air duct 101. At the top of the mixing device, the hot air medium is evenly distributed into several hot air channels 202 by a hot air divider 201, and guide vanes are installed within these channels. Through this structure, the hot air medium is evenly distributed along the height direction. The cold air medium flows through the spaced channels outside the hot air channels 202. The two media meet and mix after entering the mixing device, achieving a uniform temperature.

[0043] Since hot air flows through hot air duct 202, and cold air flows through the gap between cold air duct 102 and hot air duct 202, the wall panel of hot air duct 202 will expand and contract due to the temperature difference. The bottom of hot air duct 202 is connected to the flue bottom plate at both ends by a self-adaptive expansion and deformation plate 202b. Thermal deformation can be absorbed through deformation in the height direction, ensuring the overall safety of the mixing device.

[0044] The data shows that before the mixer was installed, the highest temperature was 608K, the lowest temperature was 482K, the temperature distribution range after mixing hot and cold air was 126K, and the relative standard deviation was 7.6%. After installing the mixer of this invention, the highest temperature was 583K, the lowest temperature was 527K, the range was 56K, and the relative standard deviation decreased to 1.9%. This significantly improves the temperature uniformity after mixing hot and cold air and enhances the mixing effect.

[0045] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or 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 invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0046] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A step premix self-adapting cold-hot air mixing device, characterized in that: The utility model relates to a kind of hot air distribution device, including, Pipeline component (100), including hot air pipeline (101) and cold air pipeline (102), Mixing component (200), including hot air dividing plate (201) on the side of the hot air pipeline (101), hot air passage (202) is installed on the side of the hot air dividing plate (201); The hot air passage (202) is fixedly connected at the outlet of the hot air pipeline (101), and the hot air passage (202) is provided with several; The two side plates of the hot air passage (202) are trapezoidal, the oblique side of the hot air passage (202) is the same as the flow direction of cold air, and each hot air passage (202) is fixedly connected with several arc flow guide plates (202a) along the trapezoidal inclined surface inside; Each arc flow guide plate (202a) is arranged in parallel, and each arc flow guide plate (202a) is arranged at equal intervals along the trapezoidal inclined surface of the hot air passage (202). The hot air dividing plate (201) is arched as a whole, and the hot air dividing plate (201) is provided with several, and the hot air dividing plate (201) is fixedly connected on the side of the hot air passage (202) close to the hot air pipeline (101).

2. The hierarchical premix adaptive cold-hot blast mixing device according to claim 1, characterized in that: The side of the hot air pipeline (101) is an inlet, and hot air enters the pipeline from the inlet, and the side of the hot air pipeline (101) is an outlet, and hot air flows to the subsequent pipeline from the outlet.

3. The hierarchical premix adaptive cold-hot blast mixing device of claim 2, wherein: The two ends of each hot air dividing plate (201) are fixedly connected with the adjacent end of the hot air passage (202).

4. The hierarchical premix adaptive cold-hot blast mixing device according to claim 3, characterized in that: The outer wall of the hot air passage (202) is fixedly connected with the cold air pipeline (102), and the diameter of the cold air pipeline (102) is greater than the sum of the diameters of all the hot air passages (202).

5. The hierarchical premix adaptive cold-hot blast mixing device of claim 4, wherein: The cold air pipeline (102) is arranged perpendicularly to the hot air pipeline (101), and the cold air flow direction of the cold air pipeline (102) is opposite to the oblique side of the hot air passage (202).

6. The hierarchical premix adaptive cold-hot blast mixing device of claim 5, wherein: One side of the hot air passage (202) is fixedly connected with the pipeline wall of the cold air pipeline (102) through self-adapting expansion deformation plate (202b).

Images