Energy-saving flue gas-air jet flow heat exchange equipment
By combining the design of jet and tube heat exchange in the flue gas-air jet heat exchange equipment and combining pipe groups of different materials, the problem of difficulty in improving heat exchange efficiency, reducing costs and maintaining service life in the prior art is solved, and an efficient, energy-saving and environmentally friendly heat exchange effect is achieved.
Patent Information
- Application Number
- CN202421754543.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-24
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-07-24
AI Technical Summary
While improving heat exchange efficiency, existing heat exchangers are difficult to reduce costs and maintain service life at the same time.
Design an energy-saving flue gas-air jet heat exchange equipment, combining the advantages of jet and tube heat exchange, by setting up multiple transverse pipeline groups in the flue gas channel and using pipe groups of different materials, reducing material requirements according to the temperature gradient and reducing production costs.
While improving heat exchange efficiency, it reduces production costs and maximizes energy consumption without affecting service life.
Smart Images
Figure CN222849846U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of heat exchange equipment, and specifically relates to energy-saving flue gas-air jet heat exchange equipment. Background Art
[0002] A heat exchanger is an energy-saving device that transfers heat between two or more fluids at different temperatures. It transfers heat from a fluid with a higher temperature to a fluid with a lower temperature, so that the fluid temperature reaches the specified index of the process to meet the needs of process conditions. It is also one of the main equipment for improving energy utilization.
[0003] At present, commonly used heat exchangers include jet heat exchangers and shell and tube heat exchangers. The jet heat exchanger area adopts the jet heat exchange method, which is a form of heat exchange that uses the impact of airflow to enhance convective heat transfer and has the advantage of high heat exchange efficiency. The theoretical basis of jet heat exchange is to use a cold fluid medium to spray onto the heat exchange surface at high speed. Due to the impact, turbulent flow is generated. When there is a temperature difference between the fluid and the solid surface, a strong heat exchange is generated. The shell and tube heat exchange area adopts the shell and tube heat exchange method. The working principle mainly involves the process of indirect heat exchange between two fluids through the tube wall. An energy-saving flue gas-air jet heat exchange equipment is now designed, which combines the advantages and characteristics of the jet heat exchanger and the shell and tube heat exchanger to further improve the heat exchange efficiency and reduce costs. Utility Model Content
[0004] The purpose of the utility model is to provide an energy-saving flue gas-air jet heat exchange device which improves heat exchange efficiency, saves energy and is environmentally friendly and reduces costs while maintaining service life, so as to solve the problems raised in the above-mentioned background technology.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] An energy-saving flue gas-air jet heat exchange device comprises a surrounding shell and a plurality of pipe groups arranged in the surrounding shell, wherein the plurality of pipe groups are arranged linearly, the axial direction of the pipe groups is perpendicular to the linear arrangement direction, and adjacent pipe groups are connected end to end, the pipe groups are formed by a bundle of a plurality of metal tubes, and the plurality of metal tubes are arranged with intervals, a flue gas inlet and a flue gas outlet are provided on the surrounding shell, which are respectively arranged at the two ends of the linear arrangement direction of the pipe groups, an air inlet and an air outlet are provided on the surrounding shell, and the air inlet and the air outlet are respectively connected to the inlet and outlet of the connected pipe groups, and the pipe group comprises a jet pipe group and a tube array group, the jet pipe group consists of jet pipes, and the tube array group consists of tube arrays.
[0007] The multiple pipe groups are interconnected, and the air inlet and the air outlet are connected at both ends of the interconnected multiple pipe groups to form an air circulation channel. The multiple pipe groups are transversely fixedly connected in the enclosed space, and the smoke inlet and the smoke outlet are connected at both ends to form a smoke channel. The smoke channel is introduced with high-temperature smoke, and the high-temperature smoke heats the air in the metal pipe by heating the metal pipe to form a smoke-air heat exchange effect. On the basis of saving energy consumption, waste emissions are also reduced, which is energy-saving and environmentally friendly. The pipe group includes the jet pipe group and the tube group. The advantage of the jet heat exchange is that the heat transfer coefficient is increased through the jet structure, and the heat exchange effect is improved. The advantage of the tube-in-tube heat exchange is that the heat exchange efficiency is increased by increasing the heat transfer area, and the structure is simple, easy to maintain, and the production cost is reduced. The equipment has the advantages of both the jet heat exchange and the tube-in-tube heat exchange, and the production cost is reduced on the basis of increasing the heat exchange efficiency.
[0008] Furthermore, the temperature tolerance of the material of the pipe group decreases in the direction of smoke flow. Different materials are used for different temperature ranges. Since the temperature is higher as it is closer to the smoke inlet, and the temperature tolerance of the material of the pipe group decreases in the direction of smoke flow, this arrangement design makes the temperature tolerance requirement of the material of the pipe group lower in the direction away from the smoke, so it is cheaper, which minimizes the cost and does not affect the service life.
[0009] Further, the jet pipe comprises an outer pipe and an inner pipe, the outer pipe is sleeved on the outer ring of the inner pipe, the inner pipe is provided with jet holes, the jet holes are evenly arranged on the inner pipe, one end of the inner pipe is closed, and the other end is open, a sealing ring is connected between the inner pipe and the outer pipe, the sealing ring closes the gap between the outer pipe and the inner pipe, and the sealing ring is arranged at the open end of the outer pipe. Air flows in from the open side of the inner pipe, enters the inner pipe, and is sprayed from the jet holes of the inner pipe to the inner wall of the outer pipe, and then flows to the outlet from the gap between the outer pipe and the inner pipe. In this process, the cold air flow is sprayed from the jet holes to the hot inner wall of the outer pipe, forming a high-speed jet, so that the fluid and the inner wall of the outer pipe have strong impact and friction, and then turbulence is formed between the outer pipe and the inner pipe, which increases the heat transfer coefficient and improves the heat transfer effect.
[0010] Furthermore, the surrounding shell is provided with partition plates at both side ends of the metal tube, and the partition plates cooperate with the surrounding shell to form a surrounding space for the plurality of pipe groups, and the two ends of the surrounding space correspond to the smoke inlet and the smoke outlet, and the partition plate is provided with a connecting cover on the side opposite to the surrounding space, and the connecting cover is used to achieve the same-side connection between two adjacent pipe groups. The partition plate and the connecting cover cooperate to achieve the connection between the pipe groups.
[0011] Furthermore, a short partition is provided between two adjacent pipe groups, the short partition is perpendicular to and connected to the partition, the length of the short partition is less than the spacing between the partitions on both sides, and the short partitions are staggered in the smoke channel. When the smoke passes through the smoke channel, it is blocked by the short partition, and then driven by the flowing smoke, so that it flows horizontally along the metal pipe to the gap at the other end of the short partition, which increases the horizontal flow process of the smoke flow route, further increases the heating process of the metal pipe, and fully increases the heat exchange efficiency.
[0012] Furthermore, the spacing between two adjacent metal tubes is greater than the diameter of the metal tube. Since the metal tubes in two adjacent rows are staggered, the flue gas passes through the gaps between the metal tubes in the previous row and directly flows to the metal tubes in the next row, which increases the flow time and flow area of the flue gas in the metal tubes, thereby increasing the heat exchange effect of the flue gas.
[0013] Furthermore, the jet heat exchange pipe is arranged on the side close to the smoke inlet, and the tube-in-tube heat exchange pipe is arranged on the side close to the smoke outlet. The heat of the metal pipe close to the smoke inlet is high, and the heat of the metal pipe far from the smoke inlet is low. The air flows from the side with low heat to the side with high heat, so that the heat exchange of the air has a process from low to high, and the heating is more sufficient.
[0014] Furthermore, the outer layer of the surrounding shell is connected to a fiber module, and the fiber module surrounds and fixes the surrounding shell. The fiber module is used to keep the interior of the surrounding shell warm and reduce heat loss.
[0015] Compared with the prior art, the beneficial effects of the present invention are:
[0016] 1. By arranging a plurality of transversely arranged pipe groups in a linear flue gas channel and connecting the pipe groups to form an air channel, the flue gas is heated through the metal pipe to achieve flue gas-air heat exchange. The equipment has the advantages of both jet heat exchange and tube-in-tube heat exchange, and reduces production costs on the basis of increasing heat exchange efficiency.
[0017] 2. The temperature tolerance of the material of the pipe group decreases in the direction of smoke flow. This arrangement design makes the temperature tolerance requirement of the material of the pipe group lower in the direction away from the smoke, thereby reducing the cost to the greatest extent without affecting the service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.
[0019] Figure 1 It is a front cross-sectional view of the utility model;
[0020] Figure 2 It is a top view of the utility model;
[0021] Figure 3 It is a schematic diagram of the flow of smoke between metal tubes in the utility model;
[0022] Figure 4 It is a structural schematic diagram of the jet pipe in the utility model;
[0023] Figure 5 It is a schematic diagram of the air flow in the jet pipe in the utility model;
[0024] Figure 6 It is a schematic diagram of the flow trajectory of air and smoke in the utility model.
[0025] In the figure: 1. surrounding shell; 2. pipe group; 3. metal pipe; 4. smoke outlet; 5. smoke inlet; 6. air outlet; 7. air inlet; 8. fiber module; 10. partition plate; 11. short partition plate; 12. connecting cover; 13. jet tube group; 14. tube array group; 15. jet tube; 16. tube array; 17. outer tube; 18. inner tube; 19. jet hole; 20. sealing ring. DETAILED DESCRIPTION
[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0027] Reference Figure 1 , a technical solution proposed by the utility model:
[0028] An energy-saving flue gas-air jet heat exchange device comprises a surrounding shell 1 and six pipe groups 2 arranged in the surrounding shell 1. The pipe group 2 comprises two jet pipe groups 13 and four tube groups 14, the jet pipe group 13 comprises jet pipes 15 with a diameter of 159 mm, and the tube group 14 comprises tubes 16 with a diameter of 30 mm.
[0029] Reference Figure 2 , Figure 3In this embodiment, further, the six pipe groups 2 are arranged linearly, the axial direction of the pipe group 2 is perpendicular to the linear arrangement direction, and the adjacent pipe groups 2 are connected end to end, the pipe group 2 is formed by a plurality of metal pipes 3, and the plurality of metal pipes 3 are arranged at intervals, and the interval between two adjacent metal pipes 3 is greater than the diameter of the metal pipe 3. The surrounding shell 1 is provided with a smoke inlet 5 and a smoke outlet 4, which are respectively arranged at both ends of the linear arrangement direction of the pipe group 2.
[0030] Reference Figure 2 and Figure 6 In this embodiment, further, the surrounding shell 1 is provided with an air inlet 7 and an air outlet 6, and the air inlet 7 and the air outlet 6 are respectively connected to the inlet and outlet of the interconnected pipe group 2. The jet pipe 15 is arranged on a side close to the smoke inlet 5, and the tube array 16 is arranged on a side close to the smoke outlet 4.
[0031] In this embodiment, further, the surrounding shell 1 is provided with a partition plate 10 at both side ends of the metal tube 3, and the partition plate 10 cooperates with the surrounding shell 1 to form an enclosed space for the multiple pipe groups 2, and the two ends of the enclosed space correspond to the smoke inlet 5 and the smoke outlet 4. The partition plate 10 is provided with a connecting cover 12 on the side opposite to the enclosed space, and the connecting cover 12 is used to achieve the same-side connection between two adjacent pipe groups 2. A short partition plate 11 is provided between two adjacent pipe groups 2, and the short partition plate 11 is perpendicular to and connected to the partition plate 10. The length of the short partition plate 11 is less than the spacing between the partition plates 10 on both sides, and the short partition plates 11 are staggered in the smoke channel.
[0032] In this embodiment, further, the temperature tolerance of the material of the pipe group 3 is reduced in sequence according to the direction of smoke flow. The temperature tolerance of the material is different. The materials of the six pipe groups are 310S, 321, 20#, 20#, 20#, 20# in the order of smoke flow direction. 310S and 321 are both stainless steel, with strong processing strength and anti-corrosion performance, while 20# is ordinary carbon steel, which is relatively cheap in the market.
[0033] Reference Figure 4 , Figure 5In this embodiment, further, the jet pipe 15 includes an outer tube 17 and an inner tube 18, the outer tube 17 is sleeved on the outer ring of the inner tube 18, the inner tube 18 is provided with jet holes 19, the jet holes 19 are evenly arranged on the inner tube 18, one end of the inner tube 18 is closed, and the other end is open, a sealing ring 20 is connected between the inner tube 18 and the outer tube 17, the sealing ring 20 closes the gap between the outer tube 17 and the inner tube 18, and the sealing ring 20 is arranged at the open end of the outer tube 17. In the same outer tube 17, there are two inner tubes 18 of equal length, the two inner tubes 18 are arranged in the same direction and coaxially, and a gap is left between the two inner tubes 18. Such a setting enables the airflow sprayed from the inner tube 17 to the inner wall of the outer tube 18 to maintain a certain temperature difference, which is conducive to increasing the heat transfer coefficient and enhancing the heat exchange effect.
[0034] Reference Figure 1 In this embodiment, further, the outer layer of the surrounding shell 1 is connected to a fiber module 8, and the fiber module 8 surrounds and fixes the surrounding shell 1.
[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. An energy-saving flue gas-air jet heat exchange device, characterized in that: The invention comprises a surrounding shell (1) and a plurality of pipe groups (2) arranged in the surrounding shell (1), wherein the plurality of pipe groups (2) are arranged in a linear manner, the axial direction of the pipe groups (2) is perpendicular to the linear arrangement direction, and adjacent pipe groups (2) are connected end to end, the pipe groups (2) are formed by a plurality of metal pipes (3) being bundled together, and the plurality of metal pipes (3) are arranged at intervals, and the surrounding shell (1) is provided with a smoke inlet (5) and a smoke outlet (4), which are respectively The surrounding shell (1) is provided at both ends of the linear arrangement direction of the pipeline group (2), and an air inlet (7) and an air outlet (6) are provided on the surrounding shell (1), and the air inlet (7) and the air outlet (6) are respectively connected to the inlet and outlet of the interconnected pipeline group (2), and the pipeline group (2) comprises a jet pipe group (13) and a tube array group (14), wherein the jet pipe group (13) is composed of jet pipes (15), and the tube array group (14) is composed of tube arrays (16).
2. The energy-saving flue gas-air jet heat exchange device according to claim 1, characterized in that: The tolerance temperature of the material of the metal tube (3) decreases in sequence according to the flow direction of the smoke.
3. The energy-saving flue gas-air jet heat exchange device according to claim 2 is characterized in that: The jet pipe (15) comprises an outer pipe (17) and an inner pipe (18); the outer pipe (17) is sleeved on the outer ring of the inner pipe (18); the inner pipe (18) is provided with jet holes (19); the jet holes (19) are evenly arranged on the inner pipe (18); one end of the inner pipe (18) is closed and the other end is open; a sealing ring (20) is connected between the inner pipe (18) and the outer pipe (17); the sealing ring (20) seals the gap between the outer pipe (17) and the inner pipe (18); the sealing ring (20) is arranged at the open end of the outer pipe (17).
4. The energy-saving flue gas-air jet heat exchange device according to claim 3 is characterized in that: The surrounding shell (1) is provided with partition plates (10) at both side ends of the metal tube (3); the partition plates (10) cooperate with the surrounding shell (1) to form a surrounding space for the plurality of pipe groups (2); the two ends of the surrounding space correspond to the smoke inlet (5) and the smoke outlet (4); the partition plate (10) is provided with a connecting cover (12) on the side opposite to the surrounding space; the connecting cover (12) is used to achieve same-side connection between two adjacent pipe groups (2).
5. The energy-saving flue gas-air jet heat exchange device according to claim 4, characterized in that: A short partition (11) is provided between two adjacent pipe groups (2); the short partition (11) is perpendicular to and connected to the partition plate (10); the length of the short partition (11) is smaller than the spacing between the partition plates (10) on both sides; and the short partitions (11) are staggered in the smoke channel.
6. The energy-saving flue gas-air jet heat exchange device according to claim 5, characterized in that: The distance between two adjacent metal tubes (3) is greater than the diameter of the metal tube (3).
7. The energy-saving flue gas-air jet heat exchange device according to claim 6, characterized in that: The jet pipe (15) is arranged on a side close to the smoke inlet (5), and the array of pipes (16) is arranged on a side close to the smoke outlet (4).
8. An energy-saving flue gas-air jet heat exchange device according to any one of claims 1 to 7, characterized in that: The outer layer of the surrounding shell (1) is connected to a fiber module (8), and the fiber module (8) surrounds and fixes the surrounding shell (1).