A flue gas waste heat recovery device for a boiler

Abstract

The utility model discloses a kind of flue gas waste heat recovery devices for boiler, it is related to waste heat recovery field, including collection tank and apron, the recess is arranged on the outer wall of collection tank, it is thread type extension, the water pipe is arranged on the inner wall of recess, the water inlet is connected on the upper end of water pipe, the water outlet is connected with the lower end of water pipe;The cylinder is rotatably connected between the apron and collection tank and is arranged in the penetration of the apron, the outer wall of cylinder is provided with threaded vane, the edge of threaded vane is provided with cleaning block;The bottom end middle part of collection tank is provided with motor assembly, and the rotating shaft of motor assembly is fixedly connected to the bottom end of cylinder.In the utility model, the heat in the entering flue gas promotes fan plate and cylinder to rotate, under the driving effect of motor assembly, make threaded vane rotate, slowly press down flue gas, so that the water pipe in collection tank can be fully contacted with flue gas heat, to improve the recovery rate of heat.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology, and in particular to a waste heat recovery device for boiler flue gas. Background Technology

[0002] A boiler is an energy conversion device that converts water or other working fluids into steam, high-temperature water, or organic heat carriers through fuel combustion or externally input heat energy, providing heat or power support for industrial production and daily life. Boilers typically generate a large amount of heat during use, and waste heat recovery devices are usually used to recover this heat in order to conserve resources.

[0003] In existing flue gas waste heat recovery technologies for boilers, the problem of low heat absorption rate is common. Currently, most waste heat recovery devices have unreasonable structural designs, resulting in short contact time and small contact area between the heated flue gas and the heat exchange components when the flue gas flows in the device, making it difficult to fully exchange heat. Moreover, some devices lack effective cleaning and filtration mechanisms. During long-term use, dirt easily accumulates on the surface of the heat exchange components, hindering heat transfer. At the same time, impurities in the flue gas are not effectively filtered, which not only affects the service life of the device but also causes certain environmental pollution. Therefore, those skilled in the art provide a flue gas waste heat recovery device for boilers to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a waste heat recovery device for boiler flue gas. The device utilizes the heat in the incoming flue gas to drive the fan plate and cylinder to rotate. Under the drive of the motor assembly, the threaded blades rotate, slowly pressing the flue gas downwards. This allows the water pipe in the collection tank to fully contact the heat from the flue gas, thereby improving the heat recovery rate.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a waste heat recovery device for boiler flue gas, comprising a collection tank and a cover plate, wherein the inner wall of the collection tank is provided with a groove, and the groove extends in a threaded manner, and a water pipe is provided on the inner wall of the groove, wherein the upper end of the water pipe is connected to a water inlet and the lower end of the water pipe is connected to a water outlet;

[0006] A cylindrical body is provided through the cover plate, and the cylindrical body is rotatably connected to the collection tank. Threaded blades are provided on the outer wall of the cylindrical body, and cleaning blocks are provided on the edge of the threaded blades.

[0007] A motor assembly is provided at the bottom center of the collection tank, and the rotating shaft of the motor assembly is fixedly connected to the bottom of the cylinder.

[0008] Through the above technical solution, driven by the motor assembly, the rotation of the threaded blades causes the flue gas and heat in the collection device to slowly move downwards, thereby making better contact with the water pipe and greatly improving the heat recovery rate. At the same time, a cleaning block is set on the outer edge of the threaded blades, which can clean the surface of the water pipe during the rotation process, preventing flue gas from adhering to the water pipe and causing poor heat absorption.

[0009] Furthermore, a sealing cover is provided on the cover plate, a carbon plate is provided inside the sealing cover, and a sealing ring is provided at the bottom of the sealing cover.

[0010] The above technical solution, through the cooperation between the sealing cover and the carbon plate, can effectively filter the flue gas and reduce environmental pollution.

[0011] Furthermore, the outer wall of the cylinder is provided with several fan-shaped plates near the upper end, and the fan-shaped plates are evenly arranged between each other.

[0012] The above technical solution, by setting up a fan plate, facilitates the rotation of the threaded blades.

[0013] Furthermore, an air inlet is horizontally inclined at a 45-degree angle through the outer wall of the collection tank, and the direction of the air inlet is perpendicular to the fan plate.

[0014] Furthermore, through holes are symmetrically provided on the lower end of the outer wall of the cylinder.

[0015] The above technical solution facilitates the discharge of flue gas from below the collection tank.

[0016] Furthermore, a plurality of bolts are provided through the cover plate, the plurality of bolts are arranged at equal intervals, and the plurality of bolts are threadedly connected to the collection tank.

[0017] The above technical solution facilitates the connection between the collection tank and the cover.

[0018] Furthermore, the sealing ring and the cover plate are magnetically attracted to each other.

[0019] This utility model has the following beneficial effects:

[0020] 1. The present invention proposes a waste heat recovery device for boiler flue gas. The flue gas carrying heat enters from the air inlet and is blown vertically toward the fan plate. Under the driving action of the motor assembly, the fan plate drives the threaded blades and the cylinder to rotate, so that the flue gas slowly descends along the threaded blades. Since the inner wall of the collection tank is provided with grooves and water pipes, the flue gas can be in full contact with the water pipes, thereby greatly improving the heat absorption rate.

[0021] 2. The boiler flue gas waste heat recovery device proposed in this utility model has a cleaning block set on the outer edge of the threaded blades. During the rotation process, the surface of the water pipe can be cleaned to prevent flue gas from adhering to the water pipe and causing poor heat absorption. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of a half-section of the present invention;

[0024] Figure 3 This is a schematic diagram of the threaded blade structure of this utility model;

[0025] Figure 4 This is a schematic diagram of the internal structure of the sealing cover of this utility model;

[0026] Figure 5 This is a bottom view of the structure of this utility model.

[0027] Legend:

[0028] 1. Collection tank; 2. Cover plate; 3. Sealing cover; 4. Air inlet; 5. Water inlet; 6. Water outlet; 7. Cleaning block; 8. Threaded blade; 9. Fan plate; 10. Cylinder; 11. Groove; 12. Water pipe; 13. Through hole; 14. Sealing ring; 15. Carbon plate; 16. Bolt; 17. Motor assembly. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments. Obviously, the described specific embodiments are only a part of the specific embodiments of the present invention, and not all of them. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Reference Figure 1-5 The present invention provides a specific embodiment of a boiler flue gas waste heat recovery device, including a collection tank 1 and a cover plate 2. The inner wall of the collection tank 1 is provided with a groove 11, which extends in a threaded manner. A water pipe 12 is provided on the inner wall of the groove 11. The upper end of the water pipe 12 is connected to a water inlet 5, and the lower end of the water pipe 12 is connected to a water outlet 6.

[0031] Furthermore, a cylinder 10 is provided through the cover plate 2, and the cylinder 10 is rotatably connected to the collection tank 1. The outer wall of the cylinder 10 is provided with threaded blades 8, and the edge of the threaded blades 8 is provided with cleaning blocks 7.

[0032] Furthermore, a motor assembly 17 is provided at the bottom center of the collection tank 1, and the rotating shaft of the motor assembly 17 is fixedly connected to the bottom of the cylinder 10.

[0033] Driven by the motor assembly 17, the rotation of the threaded blades 8 causes the flue gas and heat in the collection device to slowly move downwards, thereby making better contact with the water pipe 12 and greatly improving the heat recovery rate.

[0034] Meanwhile, a cleaning block 7 is provided on the outer edge of the threaded blade 8. During the rotation, the surface of the water pipe 12 can be cleaned to prevent flue gas from adhering to the water pipe 12 and causing poor heat absorption.

[0035] In this embodiment, a sealing cover 3 is provided on the cover plate 2, a carbon plate 15 is provided inside the sealing cover 3, and a sealing ring 14 is provided at the bottom of the sealing cover 3. The sealing ring 14 and the cover plate 2 are magnetically attracted to each other. Through the cooperation between the sealing cover 3 and the carbon plate 15, the flue gas can be effectively filtered, reducing environmental pollution. The sealing ring 14 is used to improve the sealing effect between the sealing cover 3 and the cover plate 2, preventing the flue gas from entering the cylinder 10 without passing through the carbon plate 15, thus preventing flue gas leakage and environmental pollution.

[0036] In this embodiment, a plurality of fan plates 9 are provided on the upper part of the outer wall of the cylinder 10, and the fan plates 9 are evenly arranged among each other. At the same time, an air inlet 4 is provided horizontally at a 45-degree angle through the outer wall of the collection tank 1, and the direction of the air inlet 4 is perpendicular to the fan plates 9. The gas entering from the air inlet 4 blows the fan plates 9 along the central axis of the cylinder 10 to rotate, thereby driving the threaded blades 8 to rotate.

[0037] In this embodiment, through holes 13 are symmetrically arranged at the lower end of the outer wall of the cylinder 10. This facilitates the discharge of flue gas below the collection tank 1 to the outside.

[0038] In this embodiment, a plurality of bolts 16 are provided through the cover plate 2, the bolts 16 are arranged at equal intervals, and the bolts 16 are threadedly connected to the collection tank 1. This facilitates the connection between the collection tank 1 and the cover plate 2.

[0039] The working principle of this utility model is as follows: heated flue gas enters through the air inlet 4 and is blown vertically toward the fan plate 9, causing the fan plate 9 to drive the threaded blades 8 and the cylinder 10 to rotate. At the same time, the motor assembly 17 also drives the cylinder 10 to rotate, causing the flue gas to slowly descend along the threaded blades 8. Since the inner wall of the collection tank 1 has a groove 11 and a water pipe 12, the flue gas can fully contact the water pipe 12, thereby greatly improving the heat absorption rate. Since a cleaning block 7 is provided on the outer edge of the threaded blades 8, the surface of the water pipe 12 can be cleaned during the rotation, preventing the flue gas from adhering to the water pipe 12 and causing poor heat absorption.

[0040] Several points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0041] The above description is only a preferred embodiment of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present utility model should be included in the protection scope recorded in the claims.

Claims

1. A waste heat recovery device for boiler flue gas, comprising a collection tank (1) and a cover plate (2), characterized in that: The inner wall of the collection tank (1) is provided with a groove (11), and the groove (11) extends in a threaded shape. A water pipe (12) is provided on the inner wall of the groove (11). The upper end of the water pipe (12) is connected to a water inlet (5), and the lower end of the water pipe (12) is connected to a water outlet (6). A cylinder (10) is provided through the cover plate (2), and the cylinder (10) is rotatably connected to the collection tank (1). The outer wall of the cylinder (10) is provided with threaded blades (8), and the edge of the threaded blades (8) is provided with cleaning blocks (7). A motor assembly (17) is provided at the bottom center of the collection tank (1), and the rotating shaft of the motor assembly (17) is fixedly connected to the bottom of the cylinder (10).

2. The boiler flue gas waste heat recovery device according to claim 1, characterized in that: A sealing cover (3) is provided on the cover plate (2), a carbon plate (15) is provided inside the sealing cover (3), and a sealing ring (14) is provided at the bottom inside the sealing cover (3).

3. The boiler flue gas waste heat recovery device according to claim 1, characterized in that: The outer wall of the cylinder (10) is provided with a number of fan plates (9) at the upper end, and the fan plates (9) are evenly arranged among each other.

4. The boiler flue gas waste heat recovery device according to claim 1, characterized in that: The outer wall of the collection tank (1) is provided with an air inlet (4) at a horizontal angle of 45 degrees, and the direction of the air inlet (4) is perpendicular to the fan plate (9).

5. A boiler flue gas waste heat recovery device according to claim 1, characterized in that: The outer wall of the cylinder (10) is symmetrically provided with through holes (13) at the lower end.

6. The boiler flue gas waste heat recovery device according to claim 1, characterized in that: Multiple bolts (16) are provided through the cover plate (2), and the multiple bolts (16) are arranged at equal intervals and are threadedly connected to the collection tank (1).

7. A boiler flue gas waste heat recovery device according to claim 2, characterized in that: The sealing ring (14) and the cover plate (2) are magnetically attracted to each other.

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