Cold and hot gas heat exchanger
By adopting vertical thermal conductor fins and deflector structures in gas heat exchangers, the problems of dust accumulation and corrosion are solved, and the heat exchange efficiency and equipment life are improved.
Patent Information
- Application Number
- CN202422364660.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-09-27
AI Technical Summary
Existing gas heat exchangers are prone to accumulation of dust when the gas flow is large, resulting in a decrease in heat exchange efficiency or blockage, and are prone to corrosion under abnormal working conditions.
The thermal fins and deflector structures are adopted in a vertically arranged thermal fins and the heat exchange plates are coordinated, and the deflectors are arranged inclinedly and the spacing is gradually reduced to form a turbulent area to avoid accumulation of dust and moisture accumulation.
It improves gas passing rate, reduces resistance loss, avoids accumulation of dust and blockage, enhances heat exchange efficiency, prevents equipment corrosion, and extends service life.
Smart Images
Figure CN223179361U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat exchanger equipment, in particular to a cold and hot gas heat exchanger. Background Art
[0002] A gas heat exchanger is a device that uses gas to exchange heat with other fluids (such as air, water, etc.), and meets specific process requirements by increasing or decreasing the temperature of the fluid. Gas heat exchangers can be classified according to their structure, working principle and application scenarios. Common heat exchangers include shell-and-tube heat exchangers, plate heat exchangers, heat pipe heat exchangers, etc. In the case of a large gas flow rate in the existing gas heat exchanger, ash is likely to accumulate inside the heat exchanger, resulting in a decrease in heat transfer efficiency or blockage. When condensed water precipitates in the gas under abnormal working conditions, moisture is likely to accumulate inside the heat exchanger, leading to equipment corrosion. Content of the Utility Model
[0003] In order to solve the above problems, the utility model provides a cold and hot gas heat exchanger, which includes a shell. A vertically distributed heat exchange plate is arranged inside the shell. The heat exchange plate divides the inner cavity of the shell into a cold gas flow chamber and a hot gas flow chamber. A cold gas inlet and a hot gas inlet are opened at the top of the shell, and a cold gas outlet and a hot gas outlet are opened at the bottom of the shell. The cold gas inlet and the cold gas outlet are respectively communicated with the cold gas flow chamber, and the hot gas inlet and the hot gas outlet are respectively communicated with the hot gas flow chamber. A number of heat conduction fins are respectively arranged on the two plate surfaces of the heat exchange plate at intervals along the length direction of the heat exchange plate, and the plate surfaces of the heat conduction fins are parallel to the vertical direction.
[0004] Further, a number of flow guiding plates are respectively arranged on the walls of the cold gas flow chamber and the hot gas flow chamber opposite to the heat exchange plate, and the flow guiding plates in each flow chamber are arranged at intervals along the vertical direction in sequence.
[0005] Further, the flow guiding plates are inclined, and the distance between the flow guiding plates and the heat exchange plate gradually decreases from top to bottom.
[0006] Further, in each flow chamber, there is a horizontal distance between the flow guiding plate and the heat conduction fin.
[0007] Further, each heat conduction fin includes a plurality of fin segments arranged at intervals along the vertical direction in sequence, and each fin segment is connected to the heat exchange plate.
[0008] Further, the heat conduction fins on the two plate surfaces of the heat exchange plate are arranged in a staggered manner along the length direction of the heat exchange plate.
[0009] Further, the plate surfaces of the heat conduction fins are respectively perpendicular to the plate surface of the heat exchange plate.
[0010] Further, the height of the heat-conducting fins is less than that of the heat exchange plate, and there is a vertical distance between the upper and lower ends of each heat-conducting fin and the housing.
[0011] Further, the heat exchange plate is a copper-aluminum alloy plate.
[0012] Further, a heat-insulating layer is provided on the outer side of the housing.
[0013] Due to the adoption of the above technical solutions, the present utility model has the following beneficial effects compared with the prior art:
[0014] 1) The cold and hot gas heat exchanger provided by the present utility model adopts vertically arranged heat-conducting fins, with a large gas passing rate, reduced resistance loss, and not easy to accumulate ash, avoiding the occurrence of a decrease in heat exchange efficiency or blockage caused by ash accumulation; when condensed water precipitates in the gas under abnormal working conditions, it can avoid the corrosion of the equipment caused by water accumulation.
[0015] 2) In the cold and hot gas heat exchanger provided by the present utility model, a plurality of flow guiding plates are respectively arranged in each flow chamber, which can guide the gas to flow in the area of the heat-conducting fins, reduce the ineffective or low-efficiency heat exchange flow area, and improve the heat exchange efficiency; multiple groups of flow guiding plates form air flow disturbance, the turbulent flow area increases, avoiding the occurrence of gas laminar flow, and further increasing the heat exchange efficiency; at the same time, the gas disturbance effectively avoids the deposition of dust in the gas on the heat exchange surface of the heat exchange plate, ensuring the heat exchange efficiency of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.
[0017] Figure 1 is a schematic structural diagram of the cold and hot gas heat exchanger provided by the present utility model;
[0018] Figure 2 in the cold and hot gas heat exchanger provided by the present utility model Figure 1 is the A-A cross-sectional view;
[0019] Figure 3 in the cold and hot gas heat exchanger provided by the present utility model Figure 1 is the B-B cross-sectional view;
[0020] Figure 4 is a schematic structural diagram of the cold and hot gas heat exchanger provided by the present utility model;
[0021] Figure 5The top view of the cold and hot gas heat exchanger provided by the present utility model.
[0022] 1 - housing; 11 - cold gas flow chamber; 12 - hot gas flow chamber; 13 - cold gas inlet; 14 - hot gas inlet; 15 - cold gas outlet; 16 - hot gas outlet; 17 - upper support; 18 - lower support; 2 - heat exchange plate; 3 - heat conducting fin; 31 - fin segment; 4 - flow guiding plate. Detailed implementation manners
[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. In the accompanying drawings, for the sake of clarity, the dimensions and relative dimensions of some parts may be enlarged.
[0024] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected" and "linked" shall be interpreted in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0025] In the description of the present utility model, the orientation or positional relationships such as "upper", "lower", "left", "right", "front", "rear", "center", "horizontal", "vertical", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.
[0026] In addition, in the description of the present utility model, the terms "first" and "second" are only used for descriptive distinction, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. In addition, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.
[0027] As shown in the specification appendix Figure 1 、 4As shown in FIGS. 4 and 5, the present utility model provides a cold and hot gas heat exchanger, including a housing 1. Inside the housing 1, there is a vertically distributed heat exchange plate 2. The heat exchange plate 2 divides the inner cavity of the housing 1 into a cold gas flow chamber 11 and a hot gas flow chamber 12. At the top of the housing 1, there are provided a cold gas inlet 13 and a hot gas inlet 14. At the bottom of the housing 1, there are provided a cold gas outlet 15 and a hot gas outlet 16. The cold gas inlet 13 and the cold gas outlet 15 are respectively communicated with the cold gas flow chamber 11. The hot gas inlet 14 and the hot gas outlet 16 are respectively communicated with the hot gas flow chamber 12. On the two plate surfaces of the heat exchange plate 2, there are respectively provided a number of heat conducting fins 3 arranged at intervals in the length direction of the heat exchange plate 2. The plate surfaces of each of the heat conducting fins 3 are parallel to the vertical direction.
[0028] Specifically, the heat exchanger can be used for heating cold gas or cooling hot gas. Using gas as the heat exchange medium, there is no need to introduce other media. Cold gas enters from the cold gas inlet 13, and hot gas enters from the hot gas inlet 14. The cold and hot gases exchange heat through the heat exchange plate 2. On the two plate surfaces of the heat exchange plate 2, there are respectively provided a number of heat conducting fins 3 extending into the corresponding flow chambers. A fluid channel is formed between adjacent heat conducting fins 3. The cold and hot gases can directly exchange heat through the heat exchange plate 2. At the same time, the cold and hot gases can conduct heat with the heat conducting fins 3, and then the heat exchange between the cold and hot gases is realized through the heat conduction between the heat conducting fins 3 and the heat exchange plate 2. In this application, the vertically arranged heat conducting fins 3 are adopted. The plane of the heat conducting fins 3 is parallel to the gas flow direction. When the gas flows through, it has a large passing rate, small resistance loss, and is not prone to the situation that the heat exchange efficiency decreases or is blocked due to ash accumulation. When condensate water precipitates in the gas under abnormal working conditions, the structure of the fully vertically arranged heat conducting fins can also avoid water accumulation causing equipment corrosion and extend the service life of the heat exchanger.
[0029] Preferably, the housing 1 is a rectangular housing. The heat exchange plate 2 is arranged in the middle of the rectangular housing, dividing the rectangular housing into two parts, forming a hot gas flow chamber 11 and a cold gas flow chamber 12. The cold and hot gases exchange heat in a non-contact manner. Of course, the housing 1 can also be a cylindrical housing. There is no limit to the shape of the housing. In this embodiment, the housing 1 is preferably a rectangular housing, and the four sides of the rectangular housing adopt rounded edges to reduce stress concentration.
[0030] In this application, the cold gas inlet 13 and the hot gas inlet 14 are arranged on the same side of the housing 1. The cold gas outlet 15 and the hot gas outlet 16 are arranged on the same side of the housing 1, and the two sides are opposite. The cold and hot gases both adopt the flow direction of entering from the top and exiting from the bottom. The logarithmic temperature difference reaches the maximum, and the optimal heat exchange temperature difference can be achieved. The heat exchange effect of the heat exchanger is good.
[0031] Optimized implementation manner, as shown in the attached drawings of the specification Figure 1 and 2As shown, a number of flow guide plates 4 are respectively provided on the walls of the cold medium flow chamber 11 and the hot medium flow chamber 12 that face the heat exchange plate 2, and the flow guide plates 4 in each flow chamber are arranged at intervals in the vertical direction in sequence. To improve the heat exchange efficiency, the length of the heat conduction fins 3 extending into the flow chamber is limited, and the distance between the heat exchange plate 2 and the corresponding wall surface is greater than the length of the heat conduction fins 3. To make the gas concentrate more in the area of the heat conduction fins 3, a number of flow guide plates 4 are provided on the walls of the cold medium flow chamber 11 and the hot medium flow chamber 12. The flow guide plates 4 are arranged on one side of the heat conduction fins 3, which can guide the gas to flow in the area of the heat exchange fins 3, reduce the ineffective or low-efficiency heat exchange flow area, and improve the heat exchange efficiency; at the same time, multiple groups of flow guide plates 4 form an air flow disturbance, the turbulent flow area increases, the occurrence of gas laminar flow is avoided, and the heat exchange efficiency is further increased; and the air flow disturbance can effectively prevent the dust in the gas from depositing on the heat exchange plate 2 of the heat exchanger, ensuring that the heat transfer coefficient is always close to the design value. In this application, the setting of multiple groups of flow guide plates 4 can also increase the structural strength and stability of the rectangular housing.
[0032] In an optimized embodiment, the flow guide plate 4 is inclined and the distance between it and the heat exchange plate 2 gradually decreases from top to bottom. The plate surfaces of the flow guide plates 4 on the same wall are parallel, and the included angle between the flow guide plate 4 and the wall surface is 45 - 60°.
[0033] In an optimized embodiment, in each flow chamber (i.e., the cold medium flow chamber 11 and the hot medium flow chamber 12), there is a horizontal distance between the flow guide plate 4 and the heat conduction fin 3. There is a horizontal distance between the flow guide plate 4 and the corresponding heat conduction fin 3. After the gas passes through the flow guide plate 4, a turbulent flow area is formed between the flow guide plate 4 and the heat conduction fin 3, which guides the gas to flow towards the fin area, and can also avoid the occurrence of gas laminar flow and increase the heat exchange efficiency.
[0034] In an optimized embodiment, as shown in the attached Figure 3 As shown, each heat conduction fin 3 includes a plurality of fin segments 31 arranged at intervals in the vertical direction in sequence. There is a gap between the vertically adjacent fin segments 31, and a fluid channel is formed between the horizontally adjacent heat conduction fins 3. The gas can flow between the fluid channels from the gap, which can further increase the turbulent flow area and improve the heat exchange efficiency.
[0035] Preferably, the gaps between the vertically adjacent fin segments 31 are arranged in a staggered manner in the horizontal direction, which can improve the flow efficiency of the gas between the fluid channels.
[0036] In an optimized embodiment, as shown in the attached Figure 2 As shown, the heat conduction fins 3 on the two plate surfaces of the heat exchange plate 2 are arranged in a staggered manner along the length direction of the heat exchange plate.
[0037] Optimized implementation mode, each side surface of the heat-conducting fins 3 is perpendicular to the plate surface of the heat exchange plate 2; of course, the included angle between the heat-conducting fins 3 and the heat exchange plate 2 can also be an acute angle.
[0038] Optimized implementation mode, the height of the heat-conducting fins 3 is less than the height of the heat exchange plate 2, and there are vertical intervals between each heat-conducting fin 3 and the top and bottom of the housing for gas to flow through.
[0039] Preferably, the heat exchange plate 2 is made of a material with high thermal conductivity, and the heat exchange plate 2 is preferably a copper-aluminum alloy plate; the heat-conducting fins 3 can also be made of a copper-aluminum alloy plate, an aluminum alloy plate or a steel plate. To ensure the strength of the housing, the other walls of the housing can be made of steel plates. The other walls are environmental heat dissipation surfaces, and the thermal conductivity of the steel plate is lower than that of the copper-aluminum alloy. Using steel plates for the other walls can reduce heat dissipation.
[0040] Furthermore, a heat insulation layer is provided outside the housing 1, which can further reduce heat dissipation.
[0041] Preferably, to ensure the structural strength, the upper and lower ends of the heat exchange plate 2 are respectively welded to the housing 1 through steel bars, and the steel bars are welded to the heat exchange plate 2. At the same time, the heat-conducting fins 3 are welded to the heat exchange plate 2.
[0042] Preferably, reinforcing ribs are provided inside and / or outside the housing 1 to ensure the structural strength of the housing.
[0043] Preferably, upper supports 17 and lower supports 18 are also provided on the housing 1 for supporting and fixing the heat exchanger.
[0044] Preferably, for facilitating connection with the main gas transmission and distribution pipe, the external connection ends of the cold medium inlet 13, the hot medium inlet 14, the cold medium outlet 15 and the hot medium outlet 16 are all circular interfaces, and their sizes are adapted to the main gas transmission and distribution pipe. Square-to-round joints are provided at the inlet and outlet of the housing 1. One end of the square-to-round joint is a square interface for connecting with the housing, and the other end of the square-to-round joint is a circular interface as the external connection end of the inlet and outlet.
[0045] Meanwhile, the content not described in detail in this specification all belongs to the prior art well-known to those skilled in the art.
[0046] Those skilled in the art of this technology should understand that the present utility model can be implemented in many other specific forms without departing from the spirit and scope of the present utility model. Although the embodiments of the present utility model have been described, it should be understood that the present utility model should not be limited to these embodiments. Those skilled in the art of this technology can make changes and modifications within the spirit and scope of the present utility model defined by the appended claims.
Claims
1. A cold and hot gas heat exchanger, comprising a housing, characterized in that, A heat exchange plate vertically distributed is provided inside the housing. The heat exchange plate divides the inner cavity of the housing into a refrigerant flow chamber and a heat medium flow chamber. A refrigerant inlet and a heat medium inlet are provided at the top of the housing, and a refrigerant outlet and a heat medium outlet are provided at the bottom of the housing. The refrigerant inlet and the refrigerant outlet are respectively communicated with the refrigerant flow chamber, and the heat medium inlet and the heat medium outlet are respectively communicated with the heat medium flow chamber. A number of heat conduction fins are respectively provided on the two plate surfaces of the heat exchange plate at intervals along the length direction of the heat exchange plate, and the plate surfaces of each heat conduction fin are parallel to the vertical direction.
2. The cold and hot gas heat exchanger according to claim 1, characterized in that, A number of flow guide plates are respectively provided on the walls of the refrigerant flow chamber and the heat medium flow chamber opposite to the heat exchange plate, and each of the flow guide plates in each flow chamber is arranged at intervals vertically in sequence.
3. The hot and cold gas heat exchanger according to claim 2, characterized in that, The flow guide plates are inclined and the distance between them and the heat exchange plate gradually decreases from top to bottom.
4. The hot and cold gas heat exchanger according to claim 2, characterized in that, In each flow chamber, there is a horizontal distance between the flow guide plate and the heat conduction fin.
5. The hot and cold gas heat exchanger according to claim 1, characterized in that, Each heat conduction fin includes a plurality of fin segments arranged at intervals vertically in sequence, and each fin segment is connected to the heat exchange plate.
6. The hot and cold gas heat exchanger according to claim 1, characterized in that, The heat conduction fins on the two plate surfaces of the heat exchange plate are arranged in a staggered manner along the length direction of the heat exchange plate.
7. The hot and cold gas heat exchanger according to claim 1, characterized in that, The plane of each heat conduction fin is respectively perpendicular to the plane of the heat exchange plate.
8. The hot and cold gas heat exchanger according to claim 1, characterized in that, The height of the heat conduction fin is less than the height of the heat exchange plate, and there is a vertical distance between the upper and lower ends of each heat conduction fin and the housing.
9. The hot and cold gas heat exchanger according to claim 1, characterized in that, The heat exchange plate is a copper-aluminum alloy plate.
10. The hot and cold gas heat exchanger according to claim 1, characterized in that, A heat insulation layer is provided on the outer side of the housing.