An improved flue gas heat exchanger structure

Abstract

The utility model discloses an improved flue gas heat exchanger structure, comprising a fixed shell, a smoke inlet pipe is fixedly connected to the side wall of the fixed shell, and the smoke inlet pipe is located at the bottom end of the side wall of the fixed shell, a heat exchange tube is rotatably arranged on the fixed shell, the heat exchange tube runs through the fixed shell, both ends of the heat exchange tube are connected to medium pipes, the bottom end of the fixed shell is fixedly connected to a smoke outlet pipe, the heat exchange tube is located on the side wall of the inner part of the fixed shell and is fixedly connected to multiple groups of heat exchange plates, and the bottom end of each heat exchange plate is fixedly connected to a shielding plate. In the utility model, smoke enters from the side wall of the fixed shell, so that the flow direction of the smoke changes to reduce its speed, and at the same time, the heat exchange plate is protected by the shielding plate to prevent the anti-corrosion layer on the outside of the heat exchange plate from falling off, and to prevent the heat exchange structure from being damaged, and the heat exchange plate and the heat exchange tube are rotated to increase the contact area between the heat exchange plate and the smoke, thereby improving the heat exchange effect.

Description

Technical Field

[0001] The utility model relates to the field of flue gas heat exchangers, in particular to an improved flue gas heat exchanger structure. Background Art

[0002] The flue gas discharged from high-temperature equipment has a high temperature. If it is discharged directly into the atmosphere, it will not only cause air pollution but also greatly waste energy. Therefore, it is necessary to recover and utilize the heat energy in the flue gas.

[0003] The existing heat exchanger is a shell-and-tube fin heat exchanger, with low-temperature flue gas on the upper layer and high-temperature flue gas on the lower layer. The flue gas tubes are made of carbon steel anti-corrosion material, and the flue gas enters directly from both ends. Due to the fast flue gas flow rate, the anti-corrosion layer falls off, causing oxygen corrosion and damage to the heat exchanger. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art, such as: the flue gas directly enters from both ends, the anti-corrosion layer falls off due to the fast flue gas flow rate, which further causes oxygen corrosion and damage to the heat exchanger, and an improved flue gas heat exchanger structure is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An improved flue gas heat exchanger structure comprises a fixed shell, a smoke inlet pipe is fixedly connected to the side wall of the fixed shell, and the smoke inlet pipe is located at the bottom end of the side wall of the fixed shell, a heat exchange tube is rotatably arranged on the fixed shell, the heat exchange tube passes through the fixed shell, both ends of the heat exchange tube are connected to a medium tube, the bottom end of the fixed shell is fixedly connected to a smoke outlet pipe, the heat exchange tube is located on the side wall of the inner part of the fixed shell, and a plurality of groups of heat exchange fins are fixedly connected to the side wall, each group of the heat exchange fins are staggered, and a shielding plate is fixedly connected to the bottom end of each of the heat exchange fins, and the shielding plate is wider than the heat exchange fin, and a rotating structure is arranged on the fixed shell.

[0007] Preferably, the rotating structure includes a motor fixedly connected to the bottom end of the fixed shell, the output end of the motor is fixedly connected to a rotating rod, the end of the rotating rod away from the motor is fixedly connected to a fixed gear, the fixed sleeve on the heat exchange tube is provided with a connecting gear whose position corresponds to the fixed gear, and the fixed gear is meshed with the connecting gear.

[0008] Preferably, a protective shell is provided on the outer side of the motor, the protective shell wraps the motor, and the protective shell is fixedly connected to the bottom end of the fixed shell.

[0009] Preferably, a fixing flange is provided at the connection between each medium pipe and the heat exchange pipe, and the heat exchange pipe is rotatably connected to each medium pipe via the fixing flange.

[0010] Preferably, sealing gaskets are provided on the upper and lower inner walls of the fixed shell, and the sealing gaskets are wrapped around the connection between the fixed shell and the heat exchange tube.

[0011] Preferably, an anti-corrosion layer is provided on the outer side of each of the heat exchange plates and shielding plates, and the shielding plates are made of elastic material.

[0012] Preferably, each of the heat exchange plates is arranged at an angle.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the flue gas enters from the side wall of the fixed shell, so that the flow direction of the flue gas is changed to reduce its speed. At the same time, the heat exchange plate is protected by the baffle plate to prevent the anti-corrosion layer on the outside of the heat exchange plate from falling off and the heat exchange structure from being damaged. The heat exchange plate and the heat exchange tube are rotated to increase the contact area between the heat exchange plate and the flue gas, thereby improving the heat exchange effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A three-dimensional structural schematic diagram of an improved flue gas heat exchanger structure proposed by the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of an improved flue gas heat exchanger proposed by the utility model;

[0016] Figure 3 This is a schematic diagram of the top view of the heat exchange tube of an improved flue gas heat exchanger structure proposed by the utility model.

[0017] In the figure: 1 fixed shell, 2 smoke inlet pipe, 3 smoke outlet pipe, 4 heat exchange tube, 5 heat exchange plate, 6 baffle plate, 7 medium tube, 8 fixed flange, 9 sealing gasket, 10 motor, 11 rotating rod, 12 fixed gear, 13 connecting gear, 14 protective shell. DETAILED DESCRIPTION

[0018] 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.

[0019] Reference Figure 1-Figure 3, an improved flue gas heat exchanger structure, comprising a fixed shell 1, a smoke inlet pipe 2 is fixedly connected to the side wall of the fixed shell 1, and the smoke inlet pipe 2 is located at the bottom end of the side wall of the fixed shell 1, a heat exchange tube 4 is rotatably arranged on the fixed shell 1, the heat exchange tube 4 penetrates the fixed shell 1, both ends of the heat exchange tube 4 are connected to medium pipes 7, the bottom end of the fixed shell 1 is fixedly connected to a smoke outlet pipe 3, the heat exchange tube 4 is located on the side wall of the inner part of the fixed shell 1 and is fixedly connected to multiple groups of heat exchange fins 5, the heat exchange fins 5 and the heat exchange tubes 4 are made of stainless steel 316 and ND steel, making them more durable, each group of heat exchange fins 5 are staggered, and the bottom end of each heat exchange fin 5 is fixedly connected to The baffle plate 6 is wider than the heat exchange plate 5. A rotating structure is provided on the fixed shell 1. The heat exchange medium flows into the heat exchange tube 4 from the medium pipe 7 and finally flows out to the outside of the heat exchange tube 4. The flue gas flows out through the smoke inlet pipe 2, the fixed shell 1 and the smoke outlet pipe 3. The heat exchange process is performed under the action of the heat exchange plate 5 and the heat exchange tube 4. When the flue gas enters the fixed shell 1 from the smoke inlet pipe 2 on both sides, the flow direction of the flue gas changes, thereby reducing the flow rate of the flue gas. Moreover, when the flue gas passes through the heat exchange plate 5, the baffle plate 6 will block the impact of the flue gas, thereby preventing the anti-corrosion layer on the outside of the heat exchange plate 5 from falling off due to the impact of the flue gas, thereby protecting the heat exchange plate 5.

[0020] The rotating structure includes a motor 10 fixedly connected to the bottom end of the fixed shell 1, the output end of the motor 10 is fixedly connected to a rotating rod 11, and the end of the rotating rod 11 away from the motor 10 is fixedly connected to a fixed gear 12, and a connecting gear 13 is fixedly sleeved on the heat exchange tube 4 at a position corresponding to the fixed gear 12, and the fixed gear 12 is meshed with the connecting gear 13. After the motor 10 is started, its output end drives the rotating rod 11 to rotate, so that the fixed gear 12 fixedly connected to the rotating rod 11 rotates accordingly. When the fixed gear 12 rotates, the connecting gear 13 meshed with it rotates together, driving the heat exchange tube 4 to rotate, so that the heat exchange plate 5 fixedly connected to the side wall of the heat exchange tube 4 also rotates accordingly. When the heat exchange plate 5 rotates, its contact area with the flue gas increases, thereby improving the heat exchange effect;

[0021] A protective shell 14 is disposed on the outside of the motor 10. The protective shell 14 wraps the motor 10 and is fixedly connected to the bottom end of the fixed housing 1. The protective shell 14 protects the motor 10 and prevents the motor 10 from being damaged.

[0022] A fixing flange 8 is provided at the connection between each medium pipe 7 and the heat exchange pipe 4, and the heat exchange pipe 4 is rotatably connected to each medium pipe 7 through the fixing flange 8, so that the medium pipe 7 and the heat exchange pipe 4 are fixed together;

[0023] Sealing gaskets 9 are provided on the upper and lower inner walls of the fixed shell 1. The sealing gaskets 9 are wrapped and arranged at the connection between the fixed shell 1 and the heat exchange tube 4. The sealing gaskets 9 play a sealing role to prevent smoke leakage.

[0024] The outer side of each heat exchanger plate 5 and baffle plate 6 is provided with an anti-corrosion layer, and the baffle plate 6 is made of elastic material to prevent the heat exchanger plate 5 and the baffle plate 6 from being corroded by the flue gas. At the same time, the baffle plate 6 made of elastic material has a certain buffering capacity to prevent it from being damaged by the impact of the flue gas; each heat exchanger plate 5 is inclined to increase the contact area between the heat exchanger plate 5 and the flue gas.

[0025] In the utility model, when the device is in use, the heat exchange medium is first allowed to flow into the heat exchange tube 4 from the medium pipe 7, and finally flows out to the outside of the heat exchange tube 4, and the smoke passes through the smoke inlet pipe 2, the fixed shell 1 and the smoke outlet pipe 3 to flow out, and heat exchange treatment is performed under the action of the heat exchange plate 5 and the heat exchange tube 4. When the smoke enters the fixed shell 1 from the smoke inlet pipe 2 on both sides, the flow direction of the smoke changes, thereby reducing the flow rate of the smoke, and when the smoke passes through the heat exchange plate 5, the shielding plate 6 will shield the impact of the smoke, avoiding the outside of the heat exchange plate 5 The anti-corrosion layer falls off due to the impact of the flue gas, which plays a role in protecting the heat exchange plate 5. At the same time, the motor 10 is started. After the motor 10 is started, its output end drives the rotating rod 11 to rotate, so that the fixed gear 12 fixedly connected to the rotating rod 11 rotates accordingly. When the fixed gear 12 rotates, the connecting gear 13 meshing with it rotates together, driving the heat exchange tube 4 to rotate, so that the heat exchange plate 5 fixedly connected to the side wall of the heat exchange tube 4 also rotates accordingly. When the heat exchange plate 5 rotates, its contact area with the flue gas increases, thereby improving the heat exchange effect.

[0026] 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 improved flue gas heat exchanger structure, comprising a fixed shell (1), characterized in that: A smoke inlet pipe (2) is fixedly connected to the side wall of the fixed shell (1), and the smoke inlet pipe (2) is located at the bottom end of the side wall of the fixed shell (1). A heat exchange tube (4) is rotatably arranged on the fixed shell (1), and the heat exchange tube (4) is arranged to penetrate the fixed shell (1). Both ends of the heat exchange tube (4) are connected to medium tubes (7). A smoke outlet pipe (3) is fixedly connected to the bottom end of the fixed shell (1). The heat exchange tube (4) is located on the side wall of the inner part of the fixed shell (1), and multiple groups of heat exchange plates (5) are fixedly connected to the side wall, each group of the heat exchange plates (5) is staggered, and the bottom end of each heat exchange plate (5) is fixedly connected to a shielding plate (6), and the shielding plate (6) is wider than the heat exchange plate (5). A rotating structure is arranged on the fixed shell (1).

2. The improved flue gas heat exchanger structure according to claim 1 is characterized in that: The rotating structure comprises a motor (10) fixedly connected to the bottom end of the fixed housing (1); the output end of the motor (10) is fixedly connected to a rotating rod (11); the end of the rotating rod (11) away from the motor (10) is fixedly connected to a fixed gear (12); a connecting gear (13) whose position corresponds to the fixed gear (12) is fixedly sleeved on the heat exchange tube (4); and the fixed gear (12) is meshed with the connecting gear (13).

3. The improved flue gas heat exchanger structure according to claim 2 is characterized in that: A protective shell (14) is arranged on the outside of the motor (10), the protective shell (14) wraps the motor (10), and the protective shell (14) is fixedly connected to the bottom end of the fixed housing (1).

4. The improved flue gas heat exchanger structure according to claim 1 is characterized in that: A fixed flange (8) is provided at the connection point between each medium pipe (7) and the heat exchange pipe (4), and the heat exchange pipe (4) is rotatably connected to each medium pipe (7) via the fixed flange (8).

5. The improved flue gas heat exchanger structure according to claim 1 is characterized in that: Sealing gaskets (9) are provided on the upper and lower inner walls of the fixed shell (1), and the sealing gaskets (9) are wrapped around the connection between the fixed shell (1) and the heat exchange tube (4).

6. The improved flue gas heat exchanger structure according to claim 1 is characterized in that: The outer side of each of the heat exchange plates (5) and shielding plates (6) is provided with an anti-corrosion layer, and the shielding plates (6) are made of elastic material.

7. The improved flue gas heat exchanger structure according to claim 1 is characterized in that: Each of the heat exchange plates (5) is arranged at an angle.

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