Boiler flue gas waste heat recovery device

Abstract

The utility model provides a boiler flue gas waste heat recovery device, and relates to the technical field of waste heat recovery devices, the boiler flue gas waste heat recovery device comprises a box body, one side of the box body is fixedly connected with a gas inlet pipe, a filtering device is arranged in the gas inlet pipe, and one side of the top of the box body far away from the gas inlet pipe is fixedly connected with a gas outlet pipe. A bending pipe is arranged in the box body, and the two ends of the bending pipe penetrate through the inner wall of the box body and are fixedly connected with the inner wall of the box body. And when the two clamping plates completely clamp the connecting pipeline connected with the threaded pipe, auxiliary fixing can be conducted between the connecting pipeline and the threaded pipe, connection between the connecting pipeline and the threaded pipe can be prevented from loosening or the connecting pipeline is prevented from being separated from the threaded pipe, and then waste caused by water overflowing can be avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of waste heat recovery devices, and in particular to a waste heat recovery device. Background Technology

[0002] A boiler flue gas waste heat recovery device is a specialized device designed to recover waste heat from boiler exhaust gas. It improves energy efficiency and reduces energy waste by converting the heat energy in the flue gas into other forms of usable energy, such as hot water, steam, or electricity.

[0003] Boiler flue gas waste heat recovery devices mainly utilize the principle of heat exchange. High-temperature boiler flue gas is introduced into the recovery device, which contains a winding pipe system. Low-temperature water enters through one end of the pipe, the inlet pipe. As the water flows through the pipe, it absorbs heat from the boiler flue gas and continuously heats up. Finally, it is discharged through the other end of the pipe, the outlet pipe. Both the inlet and outlet pipes are equipped with threaded pipes at one end for fixing the pipes to facilitate the water's entry and exit. However, the water flow will continuously impact the pipe connections, which may cause the pipe connections to loosen or even detach, potentially leading to water overflow and waste. Utility Model Content

[0004] This utility model proposes a waste heat recovery device to solve the problem that water flow will continuously impact the connection of pipes, which may cause the pipe connection to loosen or even detach, and may lead to water overflow and waste.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a waste heat recovery device, comprising a housing, an air inlet pipe fixedly connected to one side of the housing, a filter device disposed inside the air inlet pipe, an air outlet pipe fixedly connected to the top of the housing away from the air inlet pipe, a bent pipe disposed inside the housing, both ends of the bent pipe passing through the inner wall of the housing and fixedly connected to the inner wall of the housing, an inlet valve and an outlet valve fixedly connected to both ends of the bent pipe respectively, threaded pipes fixedly connected to one side of the inlet valve and the outlet valve respectively, the inner walls of the two threaded pipes communicating with the inner walls of the inlet valve and the outlet valve respectively, an auxiliary device disposed on the outer surface of the threaded pipe, the auxiliary device comprising an auxiliary ring, the inner wall of the auxiliary ring fixedly connected to one end of the outer surface of one end of the threaded pipe, L-shaped plates symmetrically fixedly connected to the outer surface of the auxiliary ring, threaded rods threadedly connected to the inner wall of the L-shaped plates, clamping plates rotatably connected to the two threaded rods near each other, and the threaded pipe disposed between the two clamping plates.

[0006] The effect achieved by the above components is as follows: by setting two clamping plates, under the action of two threaded rods, rotating the threaded rods will cause the threaded rods to extend and retract on the inner wall of the L-shaped plate. During the extension and retraction process, the threaded rods will drive the clamping plates to move synchronously until the two clamping plates completely clamp the connecting pipe connected to the threaded pipe. This can provide auxiliary fixation between the connecting pipe and the threaded pipe, which helps to prevent the connection between the connecting pipe and the threaded pipe from becoming loose or the connecting pipe from detaching from the threaded pipe, thereby helping to avoid water overflow and waste.

[0007] Preferably, the outer surface of the threaded rod is threaded with a nut, which is disposed between the clamping plate and the L-shaped plate.

[0008] The effect achieved by the above components is as follows: by setting the nut and rotating the nut so that one side of the nut abuts against one side of the L-shaped plate, the direction of the threaded rod away from the threaded pipe can be limited, which helps to prevent the clamping of the two clamps on the connecting pipe from loosening.

[0009] Preferably, each of the two threaded rods has an operating block fixedly connected to one of its far ends, and the outer surface of the operating block is provided with a protrusion.

[0010] The effect achieved by the above components is as follows: by setting the operating block, rotating the operating block can drive the threaded rod to rotate. At the same time, the outer surface of the operating block is provided with protrusions, which can effectively increase the friction of the outer surface of the operating block and have an anti-slip effect when rotating the operating block.

[0011] Preferably, a round rod is fixedly connected to each of the two clamping plates on the opposite sides, and the outer surface of the round rod is slidably connected to the inner wall of the L-shaped plate.

[0012] The effect achieved by the above components is that, through the round rod, when the clamping plate moves under the action of the threaded rod, the clamping plate will drive the round rod to slide synchronously on the inner wall of the L-shaped plate, and the round rod can play a role in limiting and guiding the clamping plate.

[0013] Preferably, a rubber plate is fixedly connected to one side of each of the two clamping plates that are close to each other, and one side of the rubber plate is arc-shaped.

[0014] The effect achieved by the above components is that by setting up a rubber plate, one side of the clamp can be replaced to abut against the outer surface of the connecting pipe, and the friction on one side of the clamp can be increased, making the clamping of the connecting pipe by the two clamps more stable.

[0015] Preferably, the filtering device includes a filter screen plate disposed inside the air intake pipe, and a ring is fixedly connected to the outer surface of the filter screen plate, the outer surface of the ring abutting against the inner wall of the air intake pipe.

[0016] The effect achieved by the above components is as follows: by setting up a filter screen plate and inserting it into the inner wall of the air inlet pipe, so that the outer surface of the ring abuts against the inner wall of the air inlet pipe, the filter screen plate can filter the boiler flue gas passing through the air inlet pipe, which can prevent larger dust particles from entering the interior of the housing and adhering to the outer surface of the bent pipe, thereby reducing the heat conduction efficiency of the bent pipe.

[0017] Preferably, an extension block is uniformly fixedly connected to one side of the ring, one side of the extension block abuts against the inner wall of the air intake pipe, and a threaded pin is uniformly threaded into the inner wall of the air intake pipe, with the threaded pin located on one side of the extension block.

[0018] The effect achieved by the above components is as follows: by setting the threaded pin, rotating the threaded pin causes the threaded pin to move on the inner wall of the air intake pipe until one end of the threaded pin abuts against one side of the extension block. The threaded pin can then provide auxiliary fixation between the ring connected to the extension block and the air intake pipe, which helps to prevent the filter screen from easily detaching from the air intake pipe.

[0019] Preferably, a limiting ring is fixedly connected to one side of the inner wall of the air intake pipe, and one side of the ring abuts against one side of the limiting ring.

[0020] The effect achieved by the above components is that by setting a limiting ring, the limiting ring can block one side of the ring, which can prevent the ring from detaching from the air intake pipe and falling into the box when the filter screen is installed.

[0021] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0022] In this invention, by setting two clamping plates, the threaded rods can drive the clamping plates to move synchronously until the two clamping plates completely clamp the connecting pipe connected to the threaded pipe. This can provide auxiliary fixation between the connecting pipe and the threaded pipe, which helps to prevent the connection between the connecting pipe and the threaded pipe from becoming loose or the connecting pipe from detaching from the threaded pipe, thereby helping to avoid water overflow and waste. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the main body of this utility model;

[0024] Figure 2 This is a three-dimensional structural diagram of the auxiliary device of this utility model;

[0025] Figure 3 This utility model Figure 2 A magnified structural diagram at point A;

[0026] Figure 4 This utility model Figure 2 A magnified structural diagram at point B.

[0027] Legend: 1. Box body; 2. Air inlet pipe; 3. Air outlet pipe; 4. Bent pipe; 5. Water inlet valve; 6. Water outlet valve; 7. Threaded pipe; 8. Auxiliary device; 81. Auxiliary ring; 82. L-shaped plate; 83. Threaded rod; 84. Clamping plate; 85. Nut; 86. Operating block; 87. Round rod; 88. Rubber plate; 9. Filter device; 91. Filter screen; 92. Circular ring; 93. Extension block; 94. Threaded pin; 95. Limiting ring. Detailed Implementation

[0028] Example 1, referring to Figures 1-3 As shown, this embodiment discloses a boiler flue gas waste heat recovery device, including a housing 1. An air inlet pipe 2 is fixedly connected to one side of the housing 1, and a filter device 9 is installed inside the air inlet pipe 2. An air outlet pipe 3 is fixedly connected to the top of the housing 1 away from the air inlet pipe 2. A bent pipe 4 is installed inside the housing 1, with both ends of the bent pipe 4 passing through the inner wall of the housing 1 and fixedly connected to the inner wall of the housing 1. A water inlet valve 5 and a water outlet valve 6 are fixedly connected to both ends of the bent pipe 4, respectively. One side of the water inlet valve 5 and the water outlet valve 6 are fixedly connected to... The device is equipped with two threaded pipes 7, the inner walls of which are respectively connected to the inner walls of the inlet valve 5 and the outlet valve 6. An auxiliary device 8 is provided on the outer surface of the threaded pipes 7. The auxiliary device 8 includes an auxiliary ring 81, the inner wall of which is fixedly connected to one end of the outer surface of one end of the threaded pipe 7. An L-shaped plate 82 is symmetrically fixedly connected to the outer surface of the auxiliary ring 81. A threaded rod 83 is threadedly connected to the inner wall of the L-shaped plate 82. A clamping plate 84 is rotatably connected to the two adjacent ends of the two threaded rods 83. The threaded pipe 7 is positioned between the two clamping plates 84. Between them, by setting two clamping plates 84, under the action of two threaded rods 83, the threaded rods 83 are rotated, and the threaded rods 83 will extend and retract on the inner wall of the L-shaped plate 82. During the extension and retraction of the threaded rods 83, the clamping plates 84 will move synchronously until the two clamping plates 84 completely clamp the connecting pipe connected to the threaded pipe 7. This can provide auxiliary fixation between the connecting pipe and the threaded pipe 7, which helps to prevent the connection between the connecting pipe and the threaded pipe 7 from loosening or the connecting pipe from detaching from the threaded pipe 7, and thus helps to avoid water overflow and waste. The flue gas with a high temperature enters the box 1 through the air inlet pipe 2, while the water with a lower temperature enters the water inlet valve 5 through the connecting pipe, and then enters the bend pipe 4. The bend pipe 4 inside the box 1 is winding and can maximize the contact area between the bend pipe 4 and the flue gas. During the flow of water in the bend pipe 4, it will absorb the heat in the boiler flue gas and continuously rise in temperature. Finally, the hot water flows out through the other end of the bend pipe 4 and the water outlet valve 6, and enters another connecting pipe into the container for collecting hot water.

[0029] Reference Figure 2 and Figure 3As shown, a nut 85 is threaded onto the outer surface of the threaded rod 83. The nut 85 is positioned between the clamping plate 84 and the L-shaped plate 82. By rotating the nut 85, one side of the nut 85 abuts against one side of the L-shaped plate 82, thus limiting the threaded rod 83 away from the threaded pipe 7. This helps prevent the clamping of the connecting pipe by the two clamping plates 84 from loosening. An operating block 86 is fixedly connected to the opposite ends of the two threaded rods 83. The outer surface of the operating block 86 has protrusions. By rotating the operating block 86, the threaded rod 83 can be rotated. At the same time, the protrusions on the outer surface of the operating block 86 effectively increase the friction of the outer surface of the operating block 86, providing an anti-slip effect when rotating the operating block 86.

[0030] Reference Figure 2 and Figure 3 As shown, a round rod 87 is fixedly connected to the side of each of the two clamping plates 84 that is far apart. The outer surface of the round rod 87 is slidably connected to the inner wall of the L-shaped plate 82. Through the round rod 87, when the clamping plate 84 moves under the action of the threaded rod 83, the clamping plate 84 will drive the round rod 87 to slide synchronously on the inner wall of the L-shaped plate 82. The round rod 87 can limit and guide the clamping plate 84. A rubber plate 88 is fixedly connected to the side of each of the two clamping plates 84 that is close to each other. One side of the rubber plate 88 is arc-shaped. By setting the rubber plate 88, it can replace one side of the clamping plate 84 to abut against the outer surface of the connecting pipe and increase the friction on one side of the clamping plate 84, so that the clamping of the connecting pipe by the two clamping plates 84 is more stable.

[0031] Reference Figure 2 and Figure 4 As shown, the filter device 9 includes a filter screen plate 91, which is disposed inside the air inlet pipe 2. A ring 92 is fixedly connected to the outer surface of the filter screen plate 91, and the outer surface of the ring 92 abuts against the inner wall of the air inlet pipe 2. By setting the filter screen plate 91 and inserting it into the inner wall of the air inlet pipe 2, so that the outer surface of the ring 92 abuts against the inner wall of the air inlet pipe 2, the filter screen plate 91 can filter the boiler flue gas passing through the air inlet pipe 2, and can prevent larger dust particles from entering the interior of the housing 1 and adhering to the outer surface of the bent pipe 4, thereby reducing the heat conduction efficiency of the bent pipe 4.

[0032] Reference Figure 2 and Figure 4As shown, an extension block 93 is uniformly fixedly connected to one side of the ring 92. One side of the extension block 93 abuts against the inner wall of the air intake pipe 2. Threaded pins 94 are uniformly threaded into the inner wall of the air intake pipe 2. The threaded pins 94 are located on one side of the extension block 93. By setting the threaded pins 94 and rotating them, the threaded pins 94 move along the inner wall of the air intake pipe 2 until one end of the threaded pin abuts against one side of the extension block 93. The threaded pins 94 can then provide auxiliary fixation between the ring 92 connected to the extension block 93 and the air intake pipe 2, which helps to prevent the filter screen 91 from easily detaching from the air intake pipe 2. A limiting ring 95 is fixedly connected to one side of the inner wall of the air intake pipe 2. One side of the ring 92 abuts against one side of the limiting ring 95. By setting the limiting ring 95, the limiting ring 95 can block one side of the ring 92, preventing the ring 92 from detaching from the air intake pipe 2 and falling into the housing 1 when the filter screen 91 is installed.

[0033] Working principle: Rotating the two operating blocks 86 drives the threaded rod 83 to rotate. The threaded rod 83 extends and retracts within the inner wall of the L-shaped plate 82. Under the limit of the round rod 87, the threaded rod 83 drives the clamping plate 84 to move synchronously until the rubber plate 88 on one side of the two clamping plates 84 completely clamps the connecting pipe connected to the threaded pipe 7. Then, rotating the nut 85 causes one side of the nut 85 to abut against one side of the L-shaped plate 82, thus limiting the direction of the threaded rod 83 away from the threaded pipe 7. This helps prevent the clamping of the connecting pipe by the two clamping plates 84 from loosening, thus providing auxiliary fixation between the connecting pipe and the threaded pipe 7. This helps prevent the connection between the connecting pipe and the threaded pipe 7 from loosening or the connecting pipe from detaching from the threaded pipe 7, thereby preventing water overflow. This results in waste. When the filter plate 91 needs to be installed, insert the filter plate 91 into the inner wall of the air inlet pipe 2, so that the outer surface of the ring 92 abuts against the inner wall of the air inlet pipe 2 and one side of the limiting ring 95. Then rotate the four threaded pins 94 so that the threaded pins 94 move on the inner wall of the air inlet pipe 2 until one end of the threaded pin 94 abuts against one side of the extension block 93. The threaded pins 94 can then provide auxiliary fixation between the ring 92 connected to the extension block 93 and the air inlet pipe 2, which helps to prevent the filter plate 91 from easily detaching from the air inlet pipe 2. The filter plate 91 can filter the boiler flue gas passing through the air inlet pipe 2, which can prevent larger dust particles from entering the interior of the housing 1 and adhering to the outer surface of the bent pipe 4, thus reducing the heat transfer efficiency of the bent pipe 4.

Claims

1. A boiler flue gas waste heat recovery device, comprising a housing (1), characterized in that: An air inlet pipe (2) is fixedly connected to one side of the box (1). A filter device (9) is installed inside the air inlet pipe (2). An air outlet pipe (3) is fixedly connected to the top of the box (1) away from the air inlet pipe (2). A bent pipe (4) is installed inside the box (1). Both ends of the bent pipe (4) pass through the inner wall of the box (1) and are fixedly connected to the inner wall of the box (1). A water inlet valve (5) and a water outlet valve (6) are fixedly connected to both ends of the bent pipe (4). A threaded pipe (7) is fixedly connected to one side of both the water inlet valve (5) and the water outlet valve (6). The inner wall of the threaded pipe (7) is connected to the inner wall of the inlet valve (5) and the outlet valve (6) respectively. An auxiliary device (8) is provided on the outer surface of the threaded pipe (7). The auxiliary device (8) includes an auxiliary ring (81). The inner wall of the auxiliary ring (81) is fixedly connected to one end of the outer surface of one end of the threaded pipe (7). An L-shaped plate (82) is symmetrically fixedly connected to the outer surface of the auxiliary ring (81). A threaded rod (83) is threadedly connected to the inner wall of the L-shaped plate (82). A clamping plate (84) is rotatably connected to the two threaded rods (83) at their close ends. The threaded pipe (7) is located between the two clamping plates (84).

2. The boiler flue gas waste heat recovery device according to claim 1, characterized in that: The outer surface of the threaded rod (83) is threaded with a nut (85), which is located between the clamping plate (84) and the L-shaped plate (82).

3. The boiler flue gas waste heat recovery device according to claim 1, characterized in that: An operating block (86) is fixedly connected to one end of each of the two threaded rods (83) that are far apart. The outer surface of the operating block (86) is provided with a protrusion.

4. The boiler flue gas waste heat recovery device according to claim 1, characterized in that: Both clamps (84) are fixedly connected to a round rod (87) on the opposite side, and the outer surface of the round rod (87) is slidably connected to the inner wall of the L-shaped plate (82).

5. A boiler flue gas waste heat recovery device according to claim 1, characterized in that: A rubber plate (88) is fixedly connected to one side of each of the two clamping plates (84) that are close to each other, and one side of the rubber plate (88) is arc-shaped.

6. The boiler flue gas waste heat recovery device according to claim 1, characterized in that: The filter device (9) includes a filter screen (91), which is disposed inside the air inlet pipe (2). A ring (92) is fixedly connected to the outer surface of the filter screen (91), and the outer surface of the ring (92) abuts against the inner wall of the air inlet pipe (2).

7. A boiler flue gas waste heat recovery device according to claim 6, characterized in that: An extension block (93) is uniformly fixedly connected to one side of the ring (92). One side of the extension block (93) abuts against the inner wall of the air intake pipe (2). A threaded pin (94) is uniformly threaded into the inner wall of the air intake pipe (2). The threaded pin (94) is located on one side of the extension block (93).

8. A boiler flue gas waste heat recovery device according to claim 6, characterized in that: A limiting ring (95) is fixedly connected to one side of the inner wall of the air intake pipe (2), and one side of the ring (92) abuts against one side of the limiting ring (95).

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