Baffling gate shell-and-tube heat exchanger
By setting drainage holes and bending hooks on the baffle and bending hook structures to form channels and gaps, the problems of flow dead zones and resistance in the shell-tube heat exchanger of the bow-shaped baffle plate are solved, and the disturbance of the medium is improved The degree and heat exchange performance reduce the flow dead zone and improve the heat exchange effect.
Patent Information
- Application Number
- CN202421099021.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-20
AI Technical Summary
The existing bow-shaped baffle shell and tube heat exchangers have large flow and heat transfer dead zones in the shell due to structural reasons, and the fluid flow resistance is large, especially at high flow rates, which is easy to produce fluid-induced vibration, making it difficult to reasonably adjust the process medium. to meet the needs of the process flow.
A baffle gate shell-type heat exchanger is designed, using a baffle plate and a baffle hook structure. By setting drainage holes and a baffle hook on the baffle, a channel is formed to guide the flow of the medium, increasing the media disturbance ability, and enhancing the Heat exchange effect and reduce flow dead zones through the equidistant arrangement and gap structure of the baffle.
It improves the degree of disturbance of the shell media, extends the degree of formation between the medium and the heat exchange tube, evenly distributes the flow resistance, increases the fluidity of the medium, reduces the flow dead zone of the heat exchanger, and improves the heat exchange performance.
Smart Images
Figure CN222298580U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat exchangers, in particular to a baffled tube shell type heat exchanger. Background Art
[0002] Shell and tube heat exchangers are widely used in industrial and energy transportation processes, such as petrochemical, power plants, air conditioning equipment, environmental protection and other fields due to their wide operating temperature and pressure range, low manufacturing cost, easy cleaning and large processing capacity. At the same time, high-efficiency and energy-saving heat exchange equipment plays a pivotal role in energy utilization and system economy. It is an important means of energy saving in today's engineering and an objective requirement for energy saving and consumption reduction. Shell and tube heat exchangers are devices that transfer part of the heat of hot fluid to cold fluid, also known as heat exchangers. As a key structure inside the shell, the baffle grid can change the direction of the fluid to achieve the desired flow and flow, directly affecting the fluid flow and heat transfer performance of the heat exchanger. The bow baffle shell and tube heat exchanger, which is widely used in the market, has a large flow and heat transfer dead zone in the shell due to structural reasons, and the heat exchange area cannot be fully utilized; and the shell fluid flow resistance is large, especially when the shell fluid flow rate is high, it is easy to produce fluid induced vibration, and if the external power of the fluid is limited, it is difficult to reasonably adjust the process medium to meet the needs of the process flow. Utility Model Content
[0003] Technical purpose: In view of the shortcomings of the existing technology, the utility model discloses a baffled shell and tube heat exchanger with good heat transfer effect, which can increase the disturbance degree of the shell-side medium and improve the heat exchange performance of the heat exchanger.
[0004] Technical solution: To achieve the above technical objectives, the utility model adopts the following technical solution:
[0005] A baffled grid shell and tube heat exchanger comprises a tubular shell and a plurality of baffles fixedly installed in the tubular shell, each baffle being composed of a baffle ring and a plurality of baffle plates installed on the baffle ring, each baffle plate being provided with a plurality of heat exchange tube holes along the length direction, each heat exchange tube hole being inserted with a heat exchange tube and the heat exchange tubes being parallel to each other, each heat exchange tube hole being provided with drainage holes on both sides along the width direction of the baffle plate, and the drainage holes on both sides of the heat exchange tube hole being symmetrically arranged with respect to the heat exchange tube hole, and each drainage hole being provided with a baffle hook on the side away from the heat exchange tube hole for changing the flow trajectory of the shell-side medium.
[0006] Preferably, the deflection hook is in an arc shape and is located on both sides of the deflection plate. The deflection hook on one side is bent toward the heat exchange tube, and the deflection hook on the other side is bent away from the heat exchange tube.
[0007] Preferably, a gap is formed between the deflection hook and the heat exchange tube, and they do not contact each other.
[0008] Preferably, a plurality of baffles are arranged in parallel and equidistantly to form gaps without contacting each other.
[0009] Preferably, a plurality of baffles are arranged in parallel and equidistantly in the tubular housing.
[0010] Beneficial effects:
[0011] The utility model forms a channel by opening drainage holes on the baffles, and arranging baffle hooks on the side of the drainage holes before and after the baffles away from the heat exchange tube holes, and the baffle hooks before and after the baffles are bent in opposite directions, thus forming a channel that can guide the shell-side medium to flow along the shape of the baffle hooks, thereby increasing the disturbance capacity of the shell-side medium and enhancing the heat exchange effect.
[0012] In the utility model, when the shell-side medium passes through the deflection hook, it will flow obliquely, which can extend the degree of oblique scouring of the tube bundle by the shell-side medium. At the same time, the deflection plates are evenly arranged at equal distances, which can make the velocity of the shell-side medium change smoothly, evenly disturb the shell-side medium, and disperse the resistance of the shell-side medium during flow.
[0013] Gaps are provided between the baffles of the utility model, and adjacent baffles also form a channel through each other's baffle hooks. When the shell-side medium passes through the gaps between the baffles, it will be ejected, thereby increasing the fluidity of the shell-side medium and reducing the flow dead zone of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.
[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0016] Figure 2 It is a structural schematic diagram of various components on a baffle of the utility model;
[0017] Figure 3 It is a three-dimensional structural schematic diagram of the baffle grid of the utility model;
[0018] Figure 4 This is a schematic diagram of the planar structure of the baffle grid of the utility model;
[0019] Figure 5 It is a schematic diagram of the flow direction of the shell-side medium of the utility model.
[0020] In the figure: 1. tubular shell; 2. baffle; 21. baffle ring; 22. baffle plate; 23. baffle hook; 3. heat exchange tube; 4. heat exchange tube hole; 5. drainage hole. DETAILED DESCRIPTION
[0021] The present invention will be described more clearly and completely below by way of a preferred embodiment in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiment.
[0022] like Figure 1-3 As shown, a baffle shell and tube heat exchanger includes a tubular shell 1 and a plurality of baffles 2 fixedly installed in the tubular shell 1, each baffle 2 is composed of a baffle ring 21 and a plurality of baffle plates 22 installed on the baffle ring 21, each baffle plate 22 is provided with a plurality of heat exchange tube holes 4 along the length direction, each heat exchange tube hole 4 is inserted with a heat exchange tube 3 and the heat exchange tubes 3 are parallel to each other, each heat exchange tube hole 4 is provided with drainage holes 5 on both sides along the width direction of the baffle plate 22, and the drainage holes 5 on both sides of the heat exchange tube hole 4 are symmetrically arranged about the heat exchange tube hole 4, and each drainage hole 5 is provided with a baffle hook 23 for changing the flow trajectory of the shell-side medium on the side away from the heat exchange tube hole 4.
[0023] The deflecting hook 23 is in an arc shape and is disposed on both sides of the deflecting sheet 22 . The deflecting hook on one side is bent toward the heat exchange tube 3 , while the deflecting hook on the other side is bent away from the heat exchange tube 3 .
[0024] like Figure 1 and Figure 2 As shown, both sides of the baffle 22 are provided with baffle hooks 23, that is, both sides of the shell-side medium flowing in and out of the drainage hole 5 are provided with baffle hooks 23, the baffle hooks 23 are arc-shaped, and the baffle hooks 23 located on the front and rear sides of the baffle 22 have opposite bending directions, the baffle hooks 23 on the side where the shell-side medium flows in are bent away from the heat exchange tube 3, and the baffle hooks 23 on the side where the shell-side medium flows out are bent toward the heat exchange tube 3, and a gap is formed between the baffle hooks 23 and the heat exchange tube 3, so that the shell-side medium flows in and out of the drainage hole 5. When the heat exchanger 3 is formed, the shell-side medium first flows through the gap through the baffle hook 23 whose bending direction is away from the heat exchange tube 3. At this time, the shell-side medium first fully contacts the heat exchange tube 3, and then flows upward into the drainage hole 5 along the shape of the baffle hook 23. The shell-side medium coming out of the drainage hole 5 contacts the baffle hook 23 whose bending direction is toward the heat exchange tube 3. At this time, the shell-side medium washes the heat exchange tube 3 downward along the bending direction of the baffle hook 23, and then flows into the next baffle grid 2. In this way, the shell-side medium can fully contact the heat exchange tube 3 when flowing, thereby improving the heat exchange performance of the heat exchanger.
[0025] like Figure 1 , Figure 3 and Figure 4As shown, a plurality of baffles 22 are arranged in parallel and equidistantly to form gaps without contacting each other. A plurality of baffles 22 are fixedly connected to the inner walls on both sides of the baffle ring 21 from top to bottom in sequence. Gaps are formed between the baffles 22 without contacting each other. A channel for the flow of shell-side medium is also formed between the baffle hooks 23 on the two upper and lower adjacent baffles 22, and the bending directions of the baffle hooks 23 on the two upper and lower adjacent baffles 22 are relatively arranged and symmetrically distributed with each other, which makes the baffle hooks 23 of the two upper and lower adjacent baffles 22 and the gap between the two upper and lower adjacent baffles 22 jointly form a flow channel that is wide at both ends and narrow in the middle. A part of the shell-side medium will be ejected when flowing through the flow channel, which can accelerate the flow velocity of the shell-side medium and reduce the flow dead zone of the heat exchanger.
[0026] The working principle of the utility model is as follows: Figure 5 As shown, when the shell-side medium flows in the tubular shell 1, a part of it flows between the baffle grid 2 and the heat exchange tube 3, and the other part flows between two adjacent baffle plates 2. The shell-side medium flowing between the baffle grid 2 and the heat exchange tube 3 first passes through the baffle hook 23 which is away from the heat exchange tube 3 in the bending direction. At this time, the shell-side medium first contacts and squeezes the heat exchange tube 3, and then flows upward along the baffle hook 23 through the drainage hole 5. The shell-side medium coming out of the drainage hole 5 follows the bending direction toward the arc of the baffle hook 23 of the heat exchange tube 3 and tilts downward to flush the heat exchange tube 3. After fully exchanging heat with the heat exchange tube, it flows into the baffle hook 23 of the next baffle plate 22; between two adjacent baffle grids, the shell-side medium flows into the baffle hook 23 of the next baffle plate 22. 2, passes through the baffle hooks 23 on the two adjacent baffles 22 and the gap between the two adjacent baffles 22. The bending directions of the baffle hooks 23 on the adjacent baffles 22 are opposite, thus forming a larger port for the shell-side medium to flow in and out. The shell-side medium flows in through the port. Since the size of the gap between the two adjacent baffles 22 is smaller than the size of the port formed between the baffle hooks 23, the shell-side medium will be squeezed when flowing to the gap between the two adjacent baffles 22, and then ejected from between the ports formed by the baffle hooks 23, thereby increasing the flow velocity of the shell-side medium and reducing the occurrence of flow dead zones.
[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. A baffled shell and tube heat exchanger, characterized in that: The invention comprises a tubular shell (1) and a plurality of baffles (2) fixedly mounted in the tubular shell (1), each baffle (2) comprising a baffle ring (21) and a plurality of baffle plates (22) mounted on the baffle ring (21), each baffle plate (22) being provided with a plurality of heat exchange tube holes (4) along the length direction, a heat exchange tube (3) being inserted into each heat exchange tube hole (4) and the heat exchange tubes (3) being parallel to each other, each heat exchange tube hole (4) being provided with drainage holes (5) on both sides along the width direction of the baffle plate (22), the drainage holes (5) on both sides of the heat exchange tube hole (4) being symmetrically arranged with respect to the heat exchange tube hole (4), and each drainage hole (5) being provided with a baffle hook (23) for changing the flow trajectory of the shell-side medium on the side away from the heat exchange tube hole (4).
2. The baffle shell and tube heat exchanger according to claim 1, characterized in that: The baffle hooks (23) are in an arc shape and are located on both sides of the baffle plate (22). The baffle hooks on one side are bent in a direction toward the heat exchange tube (3), while the baffle hooks (23) on the other side are bent away from the heat exchange tube (3).
3. The baffle shell and tube heat exchanger according to claim 2, characterized in that: A gap is formed between the deflection hook (23) and the heat exchange tube (3), and they do not contact each other.
4. The baffle shell and tube heat exchanger according to claim 1, characterized in that: A plurality of baffles (22) are arranged in parallel and equidistantly to form gaps, and do not contact each other.
5. The baffle shell and tube heat exchanger according to claim 1, characterized in that: A plurality of baffles (2) are arranged in parallel and at equal distances in the tubular shell (1).