A three-dimensional flow distributor

Abstract

The utility model relates to petrochemical equipment technical field, concretely relates to a three -dimensional flow guide distributor, including the impact head and two or more than that are arranged and gradually enlarged in order along the flow direction of fluid and are separated layer by layer, and the outer wall of flow guide ring is inclined, the impact head and flow guide ring between, between two adjacent flow guide rings respectively are provided with support column, to fixed with each other with the impact head and each flow guide ring according to the pre -set distance. When using, fluid is impacted to the impact head of distributor, part fluid is diffused to all around, part fluid is along the arc of impact head outer wall and enters the flow guide ring, or flows to the flow guide ring, continues to diffuse outward under the arc of its outer wall, compared with prior art, fluid is more evenly dispersed after passing through the distributor, improves distribution effect.

Description

Technical Field

[0001] This utility model relates to the field of petrochemical equipment technology, specifically to a three-dimensional flow distributor. Background Technology

[0002] The cracking furnace is a key device in an ethylene plant. After the raw material is cracked at high temperature in the furnace tubes, it enters the quench heat exchanger for rapid cooling to prevent secondary reactions and recover heat energy to generate high-pressure steam.

[0003] The flat round tube-type quench heat exchanger consists of multiple heat exchange tubes, each composed of an inner tube and an outer tube. The inner tube is concentrically inserted inside the outer tube. The inner tube carries the cracked gas, while the annular gap between the two tubes carries the cooling medium. The bottom ends of the inner and outer tubes are connected to the lower flat round tube, and the top ends are connected to the upper flat round tube. The inner tube passes completely through the flat round tube, while the outer tube does not pass through the flat round tube but is connected to the interior of the flat round tube. The two ends of the upper flat round tube are connected to the upper header, and the two ends of the lower flat round tube are connected to the lower header.

[0004] During operation, the cracked gas enters from the upper gas header, passes through each inner pipe to reach the lower gas header, and the cooling water enters from the lower header and flows through the lower flat round pipe into the annular space between the inner and outer pipes. After exchanging heat with the cracked gas, it becomes a water vapor mixture (saturated steam) and flows into the upper flat round pipe and then to the upper header.

[0005] A similar structure is the pyrolysis gas quench heat exchanger disclosed in Chinese patent document CN2164537Y, which belongs to the category of heat exchange devices. It consists of an upper head, a heat exchange tube bundle, and a lower head. Its main feature is that the lower head comprises multiple guide tubes of varying sizes and lengths, housed within an outer shell and connected by supporting ribs. Flanges are installed at both ends of the outer shell. This design solves the problem of coking in the heat exchange tube bundle, ensuring the smooth operation of ethylene production. Besides its use in modifying existing pyrolysis gas quench heat exchanger structures, it can also be applied to the novel and improved designs of various other heat exchangers, achieving energy efficiency and high performance.

[0006] For example, Chinese patent document CN203053270U discloses a multi-inlet quench heat exchanger for preventing scale corrosion. It mainly consists of an oblong lower head, a lower tube box, a lower header, a lower elliptical manifold, an outer tube, an inner tube, an upper elliptical manifold, an upper header, and an upper tube box. When the lower elliptical manifold is welded to the lower tube box, and the upper elliptical manifold is welded to the upper tube box, the axes of both the upper and lower elliptical manifolds are parallel to the minor axis of the oblong lower head. This multi-inlet quench heat exchanger is particularly suitable for use in ethylene cracking furnaces, effectively preventing scale corrosion at the root of the inner tubes.

[0007] A distributor (flow guide tube) is located inside the lower head to distribute the cracked gas entering from the bottom more evenly. Existing distributors use multiple horizontally arranged rods, with the cracked gas dispersing upwards through the gaps between adjacent rods, and then entering the inner tube of the heat exchanger jacket more evenly. Existing technology also uses flow guide tubes in the form of two nested flow guide tubes.

[0008] Research has found that the existing distributors need further improvement in guiding the flow of cracked gas. Utility Model Content

[0009] In view of the above-mentioned technical problems existing in the prior art, the present invention provides a three-dimensional flow guide distributor.

[0010] To achieve the above objectives, this utility model provides the following technical solution: A three-dimensional flow guide distributor is provided for fluid impact dispersion flow, characterized in that: it includes impact heads arranged sequentially and progressively expanding along the flow direction of the fluid and two or more flow guide rings, and the outer wall surface of the flow guide rings is inclined. Support columns are provided between the impact head and the guide ring, and between two adjacent guide rings, so as to fix the impact head and each guide ring to each other at a preset distance; The outer walls of the impact head and the guide ring are arc-shaped.

[0011] As a further alternative, the outer wall of the impact head is an outwardly convex arched arc shape, and the outer wall of the guide ring is an inwardly concave arc shape.

[0012] As a further alternative, the impacted surface of the impact head is enclosed.

[0013] As a further alternative, the outer contour of the impact head is elongated, and the outer contour of the guide ring is elliptical.

[0014] As a further alternative, the outer contour of the impact head is circular, and the outer contour of the guide ring is annular.

[0015] As a further optional solution, a plurality of support columns are provided between the impact head and the guide ring at circumferential intervals, and a plurality of support columns are also provided between two adjacent guide rings at circumferential intervals, thereby forming a multi-layer support column, with adjacent layers of support columns staggered from each other.

[0016] As a further alternative, the outer wall of the support column is flush with the outer wall of the impact head and the guide ring, and / or the outer wall of the support column is flush with the inner wall of the impact head and the guide ring.

[0017] As a further alternative, the impact head, support column, and guide ring are all integrally cast structures.

[0018] As a further alternative, the impact head, support column, and guide ring are assembled by welding them together.

[0019] As a further alternative, the guide ring furthest from the impact head has a mounting lip on its periphery.

[0020] The beneficial effects of this utility model are: This utility model discloses a three-dimensional flow guide distributor. When in use, the fluid impacts the impact head of the distributor. Some of the fluid is impacted and diffuses in all directions, while some of the fluid flows into the flow guide ring along the outer wall of the impact head, or flows to the flow guide ring and continues to diffuse outward under the arc guidance of its outer wall. Compared with the prior art, the fluid is more evenly dispersed after passing through the distributor, thus improving the distribution effect. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings. However, the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of an embodiment of a three-dimensional flow distributor according to the present invention.

[0023] Figure 2 for Figure 1 A structural diagram from another angle.

[0024] Figure 3 This is a schematic diagram of a second embodiment of a three-dimensional flow distributor according to the present invention.

[0025] Figure 4 for Figure 3 A structural diagram from another perspective.

[0026] Figure label: Impact head 1; 2. Guide ring 2, install convex lip 21; Support column 3. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0028] This embodiment provides a three-dimensional flow distributor, including components for impact dispersion of fluids (gas, liquid, gas-liquid mixtures, etc.), such as... Figure 1 and Figure 2As shown, the device includes impact heads 1 arranged sequentially and progressively larger in size along the fluid flow direction, and two guide rings 2. The outer wall of the guide rings 2 is inclined, facing the fluid being impacted. The outer diameter of the guide rings 2 gradually increases. In practice, the number of guide rings 2 can be changed to other values ​​as needed, and is not considered a limitation here.

[0029] Multiple support columns 3 are circumferentially spaced between the impact head 1 and the guide ring 2, and multiple support columns 3 are also circumferentially spaced between adjacent guide rings 2, thereby fixing the impact head 1 and each guide ring 2 to each other at a preset distance. Specifically, the support columns 3 of adjacent layers are staggered to enhance the turbulence distribution effect.

[0030] Both the outer wall of the impact head 1 and the outer wall of the guide ring 2 are arc-shaped. The outer wall of the impact head 1 is an outwardly convex arc shape, and the outer wall of the guide ring 2 is an inwardly concave arc shape.

[0031] When in use, the fluid impacts the impact head 1 of the distributor. Some of the fluid is impacted and spreads outwards, while some of the fluid flows along the arc of the outer wall of the impact head 1 into the guide ring 2, or flows to the guide ring 2 and continues to spread outwards under the guidance of the arc of its outer wall. Compared with the prior art, the fluid is more evenly dispersed after passing through the distributor, thus improving the distribution effect.

[0032] In this embodiment, the impacted surface of the impact head 1 is enclosed, and the impact head 1 is a solid structure.

[0033] In this embodiment, the outer contour of the impact head 1 is elongated, and the outer contour of the guide ring 2 is elliptical, which is suitable for guiding large inlets and multiple inlets.

[0034] Of course, in practice, it can be changed to: such as Figure 3 and Figure 4 As shown, the outer contour of the impact head 1 is circular, similar to a hemisphere; the outer contour of the guide ring 2 is annular, similar to a frustum structure with an outer arc.

[0035] In this embodiment, the outer wall of the support column 3 is flush with the outer wall of the impact head 1 and the guide ring 2, and the outer wall of the support column 3 is flush with the inner wall of the impact head 1 and the guide ring 2.

[0036] In practice, the impact head 1, support column 3, and guide ring 2 are integrally cast structures. Alternatively, the impact head 1, support column 3, and guide ring 2 are welded together.

[0037] In this embodiment, the guide ring 2 furthest from the impact head 1 has a mounting lip 21 on its periphery for fixing to the inner wall of the outer cylinder / head. Specifically, it can be bolted or welded.

[0038] In the description of this utility model, it is obvious that the described embodiments are only a part of the embodiments of this utility model, and not all of them. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] Therefore, the above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0040] In the description of this utility model, it should be noted that the terms "middle," "upper," "lower," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. A three-dimensional flow distributor for fluid impingement distributed flow, characterized by: It includes impact heads (1) arranged sequentially and expanding layer by layer along the flow direction of the fluid, and two or more guide rings (2), and the outer wall surface of the guide rings (2) is inclined; Support columns (3) are provided between the impact head (1) and the guide ring (2) and between two adjacent guide rings (2), so that the impact head (1) and each guide ring (2) are fixed to each other at a preset distance.

2. A three-dimensional flow distributor according to claim 1, characterized in that: The outer wall of the impact head (1) is an outwardly convex arched arc shape, and the outer wall of the guide ring (2) is an inwardly concave arc shape.

3. The three-dimensional flow distributor according to claim 1, wherein: The impacted surface of the impact head (1) is enclosed.

4. The three-dimensional flow distributor of claim 1, wherein: The outer contour of the impact head (1) is long and narrow, and the outer contour of the guide ring (2) is elliptical.

5. The three-dimensional flow distributor of claim 1, wherein: The outer contour of the impact head (1) is circular, and the outer contour of the guide ring (2) is annular.

6. The three-dimensional flow distributor of claim 1, wherein: Multiple support columns (3) are provided between the impact head (1) and the guide ring (2) at circumferential intervals. Multiple support columns (3) are also provided between two adjacent guide rings (2) at circumferential intervals, thereby forming a multi-layer support column (3). The two adjacent layers of support columns (3) are staggered.

7. The three-dimensional flow distributor of claim 1, wherein: The outer wall of the support column (3) is flush with the outer wall of the impact head (1) and the guide ring (2), and / or: the outer wall of the support column (3) is flush with the inner wall of the impact head (1) and the guide ring (2).

8. The three-dimensional flow distributor of claim 1, wherein: The impact head (1), support column (3) and guide ring (2) are an integral cast structure.

9. The three-dimensional flow distributor of claim 1, wherein: The impact head (1), support column (3) and guide ring (2) are assembled by welding.

10. The three-dimensional flow distributor of claim 1, wherein: The guide ring (2) furthest from the impact head (1) has a mounting lip (21) on its periphery.

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