Rectifying device and method for realizing efficient and reliable mixing

Abstract

The invention provides a rectifying device and method for realizing efficient and reliable mixing. The rectifying device comprises a cylindrical section outer wall, a circular ring section inner wall, a rectifying grid and a flange pipeline, the outer wall of the cylindrical section is butted with the flange pipeline through a flange plate end surface; an annular concave part is processed in the cylindrical section outer wall close to one side of the flange plate end surface; the outer diameter of the inner wall of the circular ring section and the inner diameter of the outer wall of the cylindrical section are equal to the inner diameter of the outer wall of the cylindrical section; the sum of the lengths of the inner wall of the circular ring section and the damping grid is equal to the length of the annular concave part in the outer wall of the cylindrical section, and the inner wall of the circular ring section abuts against and fixes the damping grid in a pipeline. The spatial position of the damping grid is changed by adjusting the spatial position of the inner wall of the exchange circular ring section and the damping grid and the length of the inner wall of the circular ring section at the two ends of the damping grid (the inner wall of the circular ring section is of a segmented structure), and the fluid temperature uniformity and the flow field uniformity are adjusted; only the damping grid and the inner wall of the circular ring section can be put into production in product production, so that the production period and the development cost can be reduced, and the flexibility of fluid adjustment is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of thermal energy engineering, and in particular relates to a rectifying device and method for realizing efficient and reliable mixing. Background Art

[0002] Due to the structural characteristics of fluid pipelines in thermal energy engineering, the spatial structure of complex pipelines is prone to uneven temperature fields, pressure fields, and velocity fields.

[0003] Rectifier grids are often used in thermal energy engineering as a device to suppress flow turbulence, improve fluid temperature uniformity, and improve flow field uniformity. After the upstream fluid passes through the rectifier grid with a hole structure, the fluid temperature uniformity and flow field uniformity are improved, which can avoid the occurrence of local high temperature areas. The rectifier grid installed in the chemical reaction area can also provide a certain flow resistance, which has the possibility of reducing the instability of chemical reactions.

[0004] Currently, most rectifier grids are directly welded or connected to the product through flanges. They have large structural dimensions and relatively fixed positions. It is not easy to adjust or replace the rectifier grid structure and spatial position, which increases the production cycle and development cost of the product to a certain extent. Summary of the invention

[0005] In order to overcome the deficiencies in the prior art, the inventors have conducted intensive research and provided a rectifier device and method for achieving efficient and reliable mixing, which can improve the uniformity of the temperature field, velocity field and pressure field in the fluid channel, avoid flow field turbulence, and suppress the possibility of unstable chemical reactions. At the same time, the product structure is easy to replace, the spatial position is easy to adjust, and the production and processing cycle is short.

[0006] The technical solution provided by the present invention is as follows:

[0007] In a first aspect, a rectifying device for achieving efficient and reliable mixing includes an outer wall of a cylindrical segment, an inner wall of an annular segment, a rectifying grid, and a flange pipeline;

[0008] The outer wall of the cylindrical section is butted against the flange pipeline through the flange end surface;

[0009] An annular recess is machined on one side of the inner wall of the cylindrical section near the end face of the flange, and the annular recess extends inward from the end face of the flange; the inner wall of the annular section and the rectifying grid are located in the annular recess of the outer wall of the cylindrical section, and the outer diameter is equal to the inner diameter of the outer wall of the cylindrical section;

[0010] The sum of the lengths of the inner wall of the annular segment and the rectifying grid is equal to the length of the inner annular recess of the outer wall of the cylindrical segment, and the inner wall of the annular segment abuts and fixes the rectifying grid in the pipeline.

[0011] In combination with the first aspect, the inner wall of the annular segment is a whole-segment structure or a segmented structure, the inner wall of the annular segment is away from the flange, and the rectifying grid is pressed against the pipeline end surface of the flange pipeline.

[0012] In combination with the first aspect, the inner wall of the circular ring segment is a whole-segment structure or a segmented structure, and the inner wall of the circular ring segment is close to the flange, and the rectifying grid is pressed against the end surface of the annular recess.

[0013] In combination with the first aspect, the inner wall of the circular ring segment is a segmented structure, and the rectifying grid is located between the segmented inner walls of the circular ring segment.

[0014] In combination with the first aspect, the inner wall of the annular segment is a straight cylindrical segment, and the inner diameter of the inner wall of the annular segment is equal to the inner diameter of the non-annular recessed section in the outer wall of the cylindrical segment, and is equal to the inner diameter of the flange pipeline.

[0015] In combination with the first aspect, the rectifying grid is cylindrical in shape as a whole, and the upper and lower bottom surfaces are spherical surfaces, and a plurality of through holes are arranged on the spherical surfaces parallel to the axial direction or along the radial direction of the bottom surface sphere.

[0016] In a second aspect, a rectification method for achieving efficient and reliable mixing adopts the rectification device for achieving efficient and reliable mixing described in the first aspect, comprising:

[0017] Arrange the inner wall of the annular segment and the rectifying grid with a central through hole in the annular recess inside the outer wall of the cylindrical segment, butt the outer wall of the cylindrical segment with a flange and the flange pipeline and tighten and fix them by bolts, and limit the inner wall of the annular segment and the rectifying grid;

[0018] After the gas and other fluids flow through the inner wall of the annular segment and the rectifying grid in the upstream direction of the pipeline, they enter the downstream of the pipeline and complete the adjustment of the uniformity of the fluid temperature and the uniformity of the flow field.

[0019] In combination with the second aspect, it also includes: adjusting the fluid temperature uniformity and flow field uniformity by adjusting the spatial position of the inner wall of the exchange ring segment and the rectifying grid.

[0020] In combination with the second aspect, it also includes: when the inner wall of the circular ring segment is a segmented structure, the rectifying grid is located between the segmented inner walls of the circular ring segment, and the spatial position of the rectifying grid is changed by adjusting the length of the inner wall of the circular ring segment at both ends of the rectifying grid, so as to adjust the fluid temperature uniformity and flow field uniformity.

[0021] A rectifying device and method for achieving efficient and reliable mixing provided by the present invention has the following beneficial effects:

[0022] (1) The present invention provides a rectifying device and method for achieving efficient and reliable mixing, comprising an outer wall of a cylindrical segment, an inner wall of an annular segment, a rectifying grid and a flange pipeline, wherein the inner wall of the annular segment and the rectifying grid are located in an annular recess of the outer wall of the cylindrical segment. When the inner wall of the annular segment is a whole-segment structure, the spatial position of the rectifying grid can be changed by adjusting the inner wall of the exchange annular segment and the rectifying grid; when the inner wall of the annular segment is a segmented structure, the spatial position of the rectifying grid can be changed by adjusting the length of the inner wall of the inner and outer segmented annular segments, so as to suppress the occurrence of chemical reaction instability, improve the flow field uniformity and temperature uniformity in the fluid channel, and avoid the occurrence of flow field turbulence and local high temperature and high pressure areas.

[0023] (2) The rectifier device and method for achieving efficient and reliable mixing provided by the present invention have been verified by a large number of numerical simulation calculations and product tests, and can be applied to the field of thermal energy engineering. It suppresses the occurrence of chemical reaction instability, improves the uniformity of the pressure field, velocity field and temperature field in the fluid channel, avoids the possibility of flow field turbulence and local high temperature and high pressure areas, improves product reliability, and extends the product life. In product production, only the rectifier grid and the inner wall of the ring segment can be put into production, which can reduce the production cycle and research and development costs. The design of the present invention can be extended to other research work with the needs of improving chemical reaction instability or fluid uniformity. In addition, the technical achievements of the present invention can also be extended to various fields such as petrochemical industry and HVAC industry, and have a good reference and promotion effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the installation of a rectifying device for achieving efficient and reliable mixing;

[0025] Figure 2 This is a schematic diagram of the structure of the rectifier grid. DETAILED DESCRIPTION

[0026] The following detailed description of the present invention will make the features and advantages of the present invention more clear and explicit.

[0027] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0028] In order to improve the uniformity of the flow field in the fluid channel, avoid turbulence in the flow field, and inhibit the occurrence of unstable chemical reactions, a rectifier is arranged at an appropriate position in the fluid domain of the pipeline. Figure 1 As shown, the rectifying device comprises a cylindrical segment outer wall 1, an annular segment inner wall 2, a rectifying grid 3 and a flange pipeline 4;

[0029] The outer wall 1 of the cylindrical section is butted against the flange pipe 4 through the flange end surface;

[0030] An annular recess is machined on one side of the inner part of the cylindrical section outer wall 1 close to the end face of the flange, and the annular recess extends inward from the end face of the flange; the annular section inner wall 2 and the rectifying grid 3 are located in the annular recess of the cylindrical section outer wall 1, and the outer diameter is equal to the inner diameter of the cylindrical section outer wall 1;

[0031] The inner wall 2 of the annular segment is a straight cylinder segment, and the rectifying grid 3 is cylindrical as a whole, and the upper and lower bottom surfaces are spherical surfaces, and a plurality of through holes parallel to the axis direction or along the radial direction of the bottom surface are arranged on the spherical surface. Figure 2 The sum of the lengths of the inner wall 2 of the annular segment and the rectifying grid 3 is equal to the length of the inner annular recess of the outer wall 1 of the cylindrical segment, and the inner wall 2 of the annular segment abuts and fixes the rectifying grid 3 in the pipeline.

[0032] In a preferred embodiment, the inner wall 2 of the circular ring segment is a whole-segment structure or a segmented structure, and the inner wall 2 of the circular ring segment is away from the flange, and the rectifying grid 3 is pressed against the pipeline end surface of the flange pipeline 4. Figure 1 superior;

[0033] Alternatively, the inner wall 2 of the circular ring segment is a whole-segment structure or a segmented structure, the inner wall 2 of the circular ring segment is close to the flange, and the rectifying grid 3 is pressed against the end surface of the annular concave portion. Figure 1 middle;

[0034] Alternatively, the inner wall 2 of the circular ring segment is a segmented structure, and the rectifying grid 3 is located between the segmented inner walls 2 of the circular ring segment. Figure 1 Down.

[0035] When the inner wall of the circular segment is a whole-segment structure or a segmented structure, the spatial position of the rectifying grid 3 can be changed by adjusting the spatial position of the inner wall of the exchange circular segment and the rectifying grid, or when the inner wall of the circular segment is a segmented structure, the length of the segmented circular segment inner wall 2 on both sides of the rectifying grid 3 can be adjusted to suppress the occurrence of chemical reaction instability. According to the flow field characteristics, the structural parameters such as the profile, thickness, opening size, number of openings, and opening direction of the rectifying grid can be adjusted to improve the flow field uniformity and temperature uniformity in the fluid channel, and avoid the occurrence of flow field turbulence and local high temperature and high pressure areas.

[0036] In a preferred embodiment, the inner diameter of the annular segment inner wall 2 is equal to the inner diameter of the non-annular recessed section in the cylindrical segment outer wall 1 , and is equal to the inner diameter of the flange pipeline 4 .

[0037] like Figure 1As shown, the spherical concave surface of the rectifying grid 3 faces the outer wall of the cylindrical section, and the spherical convex surface faces the flange pipeline 4. During operation, the gas or other fluid flows from the outer wall 1 of the cylindrical section through the inner wall 2 of the annular section and the rectifying grid 3, and then enters the downstream flange pipeline 4 to adjust the uniformity of the fluid temperature and the uniformity of the flow field. If the spherical convex surface of the rectifying grid 3 faces the outer wall of the cylindrical section, and the spherical concave surface faces the flange pipeline 4, during operation, the gas or other fluid flows from the flange pipeline 4 through the rectifying grid 3 and the inner wall 2 of the annular section, and then enters the outer wall 1 of the downstream cylindrical section to adjust the uniformity of the fluid temperature and the uniformity of the flow field.

[0038] The present invention also provides a rectification method for achieving efficient and reliable mixing, comprising:

[0039] The inner wall 2 of the circular ring segment and the rectifying grid 3 with a central through hole are arranged in the annular recess inside the outer wall 1 of the cylindrical segment, the outer wall 1 of the cylindrical segment with a flange and the flange pipeline 4 are docked and fixed by bolts, and the inner wall 2 of the circular ring segment and the rectifying grid 3 are limited; after the gas and other fluids flow through the inner wall 2 of the circular ring segment and the rectifying grid 3 in the upstream direction of the pipeline, they enter the downstream of the pipeline to complete the adjustment of the uniformity of the fluid temperature and the uniformity of the flow field. When in use, the spatial position of the rectifying grid 3 can be adjusted by adjusting the segment length of the inner wall 2 of the circular ring segment, thereby reducing the possibility of chemical reaction instability and improving the uniformity of the temperature field, pressure field and velocity field. At the same time, the spatial position of the rectifying grid 3 and the inner wall 2 of the circular ring segment can also be exchanged to achieve the purpose of adjusting the spatial position of the rectifying grid.

[0040] The present invention has been described in detail above in conjunction with specific implementations and exemplary examples, but these descriptions cannot be understood as limiting the present invention. Those skilled in the art understand that, without departing from the spirit and scope of the present invention, a variety of equivalent substitutions, modifications or improvements may be made to the technical solution of the present invention and its implementation methods, all of which fall within the scope of the present invention. The scope of protection of the present invention shall be subject to the attached claims.

[0041] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A rectifying device for achieving efficient and reliable mixing, characterized in that: It comprises a cylindrical segment outer wall (1), an annular segment inner wall (2), a rectifying grid (3) and a flange pipeline (4); The outer wall of the cylindrical section (1) is butted against the flange pipeline (4) via the flange end surface; An annular recess is machined on one side of the inner part of the cylindrical section outer wall (1) close to the end face of the flange, and the annular recess extends inward from the end face of the flange; the annular section inner wall (2) and the rectifying grid (3) are located in the annular recess of the cylindrical section outer wall (1), and the outer diameter is equal to the inner diameter of the cylindrical section outer wall (1); The sum of the lengths of the inner wall of the circular ring segment (2) and the rectifying grid (3) is equal to the length of the inner annular recess of the outer wall of the cylindrical segment (1), and the inner wall of the circular ring segment (2) abuts against and fixes the rectifying grid (3) in the pipeline.

2. The rectifier device for achieving efficient and reliable mixing according to claim 1, characterized in that: The inner wall (2) of the circular ring segment is a whole-segment structure or a segmented structure. The inner wall (2) of the circular ring segment is away from the flange plate, and the rectifying grid (3) is pressed against the pipeline end surface of the flange pipeline (4).

3. The rectifier device for achieving efficient and reliable mixing according to claim 1, characterized in that: The inner wall (2) of the circular ring segment is a whole-segment structure or a segmented structure. The inner wall (2) of the circular ring segment is close to the flange, and the rectifying grid (3) is pressed against the end surface of the annular recess.

4. The rectifier device for achieving efficient and reliable mixing according to claim 1, characterized in that: The inner wall (2) of the circular ring segment is a segmented structure, and the rectifying grid (3) is located between the segmented inner walls (2) of the circular ring segment.

5. The rectifier device for achieving efficient and reliable mixing according to claim 1, characterized in that: The inner wall (2) of the annular segment is a straight cylindrical segment, and the inner diameter of the inner wall (2) of the annular segment is equal to the inner diameter of the non-annular recessed section in the outer wall (1) of the cylindrical segment, and is also equal to the inner diameter of the flange pipeline (4).

6. The rectifier device for achieving efficient and reliable mixing according to claim 1, characterized in that: The rectifying grid (3) is cylindrical in shape as a whole, and the upper and lower bottom surfaces are spherical surfaces, on which a plurality of through holes are arranged parallel to the axial direction or along the radial direction of the bottom sphere.

7. A rectification method for achieving efficient and reliable mixing, characterized in that: The rectifier device for realizing efficient and reliable mixing according to any one of claims 1 to 6 comprises: The inner wall of the circular ring segment (2) and the rectifying grid (3) with a central through hole are arranged in the annular recess inside the outer wall of the cylindrical segment (1), the outer wall of the cylindrical segment with a flange (1) and the flange pipeline (4) are butted and fixed by bolts, and the inner wall of the circular ring segment (2) and the rectifying grid (3) are limited; After the gas or other fluid flows in the upstream direction of the pipeline through the inner wall of the annular segment (2) and the rectifying grid (3), it enters the downstream of the pipeline and completes the adjustment of the uniformity of the fluid temperature and the uniformity of the flow field.

8. The rectification method for achieving efficient and reliable mixing according to claim 7, characterized in that: Also includes: By adjusting the spatial position of the inner wall (2) of the exchange annular segment and the rectifying grid (3), the uniformity of fluid temperature and the uniformity of the flow field are adjusted.

9. The rectification method for achieving efficient and reliable mixing according to claim 7, characterized in that: Also includes: When the inner wall (2) of the circular ring segment is a segmented structure, the rectifying grid (3) is located between the segmented inner walls (2) of the circular ring segment. By adjusting the length of the inner walls (2) of the circular ring segment at both ends of the rectifying grid (3), the spatial position of the rectifying grid (3) is changed, and the uniformity of fluid temperature and flow field is adjusted.

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