Steam boiler waste heat recovery device

Abstract

The utility model discloses a steam boiler waste heat recovery device belongs to industrial steam boiler field, including heat exchange jar, the outer surface fixed mounting of vertical board has multiple groups of heat absorption fin, and multiple groups of the bottom of connecting plate all are fixedly installed with heat conduction rod, and heat conduction rod is located the inner wall of water tank, the inner wall fixed mounting of water tank has the water inlet pipe, and the water inlet pipe and water inlet intercommunication, enter the hot gas through the air inlet, and heat absorption fin is with big specific surface area and absorbs heat quickly, and then vertical board, connecting plate and heat conduction rod give the water in water tank with high -efficient heat transfer, and the water inlet pipe through -hole makes water even dispersion, and increases the contact area. Motor drive stirring subassembly, let the water body circulate and flow, and heat more evenly, solved the traditional device heating uneven problem. Hot gas is discharged from the air outlet, and hot water is discharged from the water outlet for production and life use, effectively realized the waste heat recycling, and improved the energy utilization rate.

Description

Technical Field

[0001] This utility model relates to the field of industrial steam boiler technology, specifically a steam boiler waste heat recovery device. Background Technology

[0002] In industrial production, steam boilers play an indispensable role as important energy conversion equipment, and are widely used in many industries such as chemical, textile, food processing, and heating. During the operation of a steam boiler, a portion of the heat generated by fuel combustion is used to heat water into steam for production use; however, a considerable amount of heat is still discharged from the boiler along with high-temperature flue gas and slag, resulting in a significant waste of energy.

[0003] Currently, existing waste heat recovery devices for steam boilers have achieved the recovery and utilization of waste heat to a certain extent. The main method is to use the recovered heat to heat water sources and provide hot water for other production processes or living facilities of enterprises. However, in practical applications, these waste heat recovery devices have exposed many problems, among which uneven heating is particularly prominent.

[0004] Most existing waste heat recovery devices use relatively simple heat exchange structures, such as single shell-and-tube heat exchangers or plate heat exchangers. During the heat transfer process, due to the unreasonable layout and design of the heat exchange elements, the heat is unevenly distributed in the heat exchange medium (such as water). Water in some areas can quickly absorb a large amount of heat and its temperature rises rapidly, while water in other areas absorbs less heat and its temperature rises slowly. This uneven heating not only affects the overall quality of the hot water but also fails to meet the strict requirements of the production process for the uniformity of hot water temperature.

[0005] Therefore, this utility model provides a waste heat recovery device for steam boilers to solve the above problems. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] This utility model provides a waste heat recovery device for a steam boiler, which aims to solve the problems mentioned in the background art.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution: a waste heat recovery device for a steam boiler, comprising a heat exchange tank, an outlet at one end of the heat exchange tank and an inlet at the other end of the heat exchange tank, a water tank fixedly installed at the bottom end of the heat exchange tank, an inlet at one end of the water tank and an outlet at the other end of the water tank, multiple sets of connecting plates fixedly installed at the top of the inner wall of the water tank, vertical plates fixedly installed at the top of the multiple sets of connecting plates, the top of the multiple sets of connecting plates extending upward and fixedly installed with vertical plates, multiple sets of heat-absorbing fins fixedly installed on the outer surface of the vertical plates, heat-conducting rods fixedly installed at the bottom of the multiple sets of connecting plates, and the heat-conducting rods being located on the inner wall of the water tank, a water inlet pipe fixedly installed on the inner wall of the water tank, and the water inlet pipe communicating with the water inlet, multiple sets of through holes opened on the outer surface of the water inlet pipe, and a stirring assembly provided on the water inlet pipe for stirring the water source.

[0010] As a preferred technical solution of this application, the stirring assembly includes multiple sets of rings rotatably mounted on the water inlet pipe, multiple sets of connecting rods are fixedly installed between the multiple sets of rings, and multiple sets of stirring rods are fixedly installed on the multiple sets of rings. The heat exchange tank is provided with a driving assembly for controlling the rotation of the multiple sets of rings.

[0011] As a preferred technical solution of this application, the ends of the multiple sets of connecting rods are fixedly installed with a first gear, and the first gear rotates to be sleeved on the outer surface of the water inlet pipe, and the first gear meshes with the drive assembly.

[0012] As a preferred technical solution of this application, the drive assembly includes a motor installed on the side wall of the water tank, the output shaft of the motor passing through the side wall of the water tank and extending into its interior, and a second gear fixedly installed at the end of the output shaft, the second gear meshing with the first gear.

[0013] As a preferred technical solution of this application, a sealing rubber gasket is fixedly installed between the motor and the water tank, and the sealing rubber gasket is sleeved on the outside of the output shaft of the motor.

[0014] As a preferred technical solution of this application, a pressure gauge is provided at the top of the heat exchange tank.

[0015] (III) Beneficial Effects

[0016] 1. Hot air enters through the air inlet, and the heat-absorbing fins, with their large specific surface area, quickly absorb heat. The heat is then efficiently transferred to the water in the tank via a vertical plate, connecting plate, and heat-conducting rod. The through-hole in the water inlet ensures even water distribution and increases the contact area. A motor-driven stirring assembly circulates the water, resulting in more uniform heating and solving the problem of uneven heating in traditional devices. Hot air is discharged from the air outlet, and hot water is discharged from the water outlet for production and domestic use, effectively realizing waste heat recovery and improving energy efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the first overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the second overall structure of the present invention;

[0019] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 4 for Figure 1 Enlarged structural diagram at point A in the middle;

[0021] Figure 5 for Figure 3 Enlarged structural diagram at point B.

[0022] In the diagram: 1. Heat exchanger; 11. Pressure gauge; 12. Air inlet; 13. Air outlet; 2. Water tank; 21. Water inlet; 22. Water outlet; 3. Water inlet pipe; 4. Ring; 41. Stirring rod; 42. Connecting rod; 43. First gear; 5. Connecting plate; 51. Heat-conducting rod; 6. Vertical plate; 61. Heat-absorbing fins; 7. Motor; 71. Sealing rubber gasket; 72. Second gear. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] This utility model provides a waste heat recovery device for a steam boiler, such as... Figures 1-5As shown, the system includes a heat exchange tank 1. One end of the heat exchange tank 1 has an outlet 13, which is used to discharge gas whose temperature has decreased after heat exchange, ensuring the orderly flow of hot gas within the heat exchange tank 1. The other end of the heat exchange tank 1 has an inlet 12, and the outlet 13 is used to discharge gas whose temperature has decreased after heat exchange, again ensuring the orderly flow of hot gas within the heat exchange tank 1. A water tank 2 is fixedly installed at the bottom of the heat exchange tank 1. One end of the water tank 2 has a water inlet 21, which facilitates the entry of external cold water into the water tank 2. The other end of the water tank 2 has a water outlet 22. Multiple sets of connecting plates 5 are fixedly installed on the top of the inner wall of the water tank 2. Vertical plates 6 are fixedly installed on the top of the multiple sets of connecting plates 5. The top of the multiple sets of connecting plates 5 extends upwards and is fixedly installed on the vertical plates 6. Multiple sets of heat-absorbing fins 61 are fixedly installed on the outer surface of the vertical plates 6. The heat-absorbing fins 61 have a large specific surface area, which can quickly absorb the heat from the hot air entering the heat exchange tank 1 from the air inlet 12, thus improving the heat absorption efficiency. The bottom ends of the multiple connecting plates 5 are all fixedly installed with heat-conducting rods 51, and the heat-conducting rods 51 are located on the inner wall of the water tank 2. They can efficiently conduct the heat absorbed by the heat-absorbing fins 61 and the vertical plate 6 to the water, realizing the effective transfer of waste heat from the hot air to the water, so that the water can be heated. The inner wall of the water tank 2 is fixedly installed with a water inlet pipe 3, and the water inlet pipe 3 is connected to the water inlet 21. Multiple through holes are opened on the outer surface of the water inlet pipe 3. The multiple through holes on the outer surface of the water inlet pipe 3 can evenly disperse the incoming water into the water tank 2, increasing the contact area between the water and the subsequent heat-conducting structure, which is conducive to the faster and more even transfer of heat to the water, thus improving the heating efficiency. A stirring component is provided on the water inlet pipe 3 for stirring the water source.

[0025] The stirring assembly includes multiple sets of rings 4 rotatably mounted on the water inlet pipe 3. Multiple sets of connecting rods 42 are fixedly installed between the rings 4, and multiple sets of stirring rods 41 are fixedly installed on the rings 4, forming a structure that can rotate as a whole. When this structure rotates, it can stir the water in the water tank 2, causing good circulation within the water tank 2 and ensuring that the water in all parts can fully contact the heat-conducting rods 51, thereby ensuring that the water in the water tank 2 is heated evenly. A drive assembly is provided on the heat exchange tank 1 to control the rotation of the multiple sets of rings 4.

[0026] The first gear 43 is fixedly installed at the end of the multiple sets of connecting rods 42. The first gear 43 rotates and is sleeved on the outer surface of the water inlet pipe 3. The first gear 43 meshes with the drive assembly. The gear assembly is made of stainless steel. The drive assembly drives the first gear 43 to rotate, thereby causing the connecting rods 42 and the ring 4 to rotate, thus realizing the stirring function. The stainless steel gear assembly has good corrosion resistance and wear resistance, and can work stably for a long time in the humid environment inside the water tank 2. This reduces failures caused by corrosion and wear, extends the service life of the device, and reduces maintenance costs.

[0027] The drive assembly includes a motor 7 mounted on the side wall of the water tank 2. The output shaft of the motor 7 passes through the side wall of the water tank 2 and extends into its interior. A second gear 72 is fixedly mounted at the end of the output shaft. The second gear 72 meshes with the first gear 43. By meshing the second gear 72 and the first gear 43 at the end of the output shaft of the motor 7, the rotational motion of the motor is transmitted to the stirring assembly, enabling the stirring assembly to rotate at a set speed and direction. This achieves automatic stirring of the water in the water tank 2, improving the automation level and working efficiency of the device.

[0028] A sealing rubber gasket 71 is fixedly installed between the motor 7 and the water tank 2. The sealing rubber gasket 71 is sleeved on the outside of the output shaft of the motor 7, which can effectively prevent water in the water tank 2 from leaking out through the gap between the output shaft of the motor 7 and the side wall of the water tank 2, thus ensuring the sealing of the device.

[0029] The heat exchange tank 1 is equipped with a pressure gauge 11 at its top, which allows for timely monitoring of air pressure data. When abnormal air pressure occurs, staff can quickly take measures, such as adjusting the air intake and exhaust volume, to prevent damage to the equipment due to excessively high or low air pressure, thus ensuring the safe and stable operation of the equipment.

[0030] Working principle: In industrial production, when a steam boiler is running, it will discharge a large amount of hot air carrying waste heat. The hot air generated by the boiler first enters the heat exchange tank 1 through the air inlet 12 opened at one end of the heat exchange tank 1. After entering the heat exchange tank 1, the hot air flows inside the tank. At this time, multiple sets of connecting plates 5 fixedly installed on the top of the inner wall of the water tank 2 and the vertical plates 6 fixedly extended upward from the top of the plates play a role. Multiple sets of heat-absorbing fins 61 fixedly installed on the outer surface of the vertical plates 6 have a large specific surface area and can quickly absorb the heat in the hot air.

[0031] The heat absorbed by the heat-absorbing fins 61 is efficiently transferred to multiple sets of connecting plates 5 through the vertical plate 6. The heat-conducting rods 51 fixedly installed at the bottom of the connecting plates 5 penetrate into the water inside the water tank 2. The heat-conducting rods 51 further conduct the heat to the water inside the water tank 2, realizing the initial transfer of heat.

[0032] At the same time, water enters from the inlet 21 at one end of the water tank 2 and flows into the inlet pipe 3, which is connected to the inlet 21. Multiple sets of through holes are opened on the outer surface of the inlet pipe 3. The water is evenly distributed into the water tank 2 through these through holes, which increases the contact area between the water and the heat-conducting rod 51 and is conducive to the full exchange of heat.

[0033] To further improve the heating uniformity of the water in the water tank 2, the motor 7 installed on the side wall of the water tank 2 is started. The output shaft of the motor 7 passes through the side wall of the water tank 2 and extends into its interior. The second gear 72, which is fixedly installed at the end of the output shaft, rotates accordingly. The rotation of the second gear 72 drives the first gear 43 to rotate. The first gear 43, in turn, drives multiple sets of rings 4 and the stirring rod 41 fixed on the rings 4 to rotate through the connecting rod 42. This stirs the water at the bottom of the water tank 2, so that the water forms a good circulation flow in the water tank 2. This ensures that the water in each part can fully absorb the heat transferred by the heat conduction rod 51, effectively solving the problem of uneven heating in traditional waste heat recovery devices.

[0034] After the hot air completes the heat transfer, it is discharged from the air outlet 13 at the other end of the heat exchange tank 1, while the fully heated water is discharged from the water outlet 22 at the other end of the water tank 2. It can be used in other production processes or living facilities of the enterprise, realizing the effective recovery and utilization of waste heat from the steam boiler.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A waste heat recovery device for a steam boiler, comprising a heat exchange tank (1), wherein one end of the heat exchange tank (1) is provided with an outlet (13) and the other end of the heat exchange tank (1) is provided with an inlet (12), characterized in that: The heat exchange tank (1) is fixedly installed with a water tank (2) at the bottom end, and the water tank (2) has an inlet (21) at one end and an outlet (22) at the other end. Multiple sets of connecting plates (5) are fixedly installed on the top of the inner wall of the water tank (2). A vertical plate (6) is fixedly installed on the top of the multiple sets of connecting plates (5). The top of the multiple sets of connecting plates (5) extends upward and is fixedly installed with a vertical plate (6). Multiple sets of heat-absorbing fins (61) are fixedly installed on the outer surface of the vertical plate (6). A heat-conducting rod (51) is fixedly installed at the bottom of the multiple sets of connecting plates (5), and the heat-conducting rod (51) is located on the inner wall of the water tank (2). The inner wall of the water tank (2) is fixedly installed with a water inlet pipe (3), and the water inlet pipe (3) is connected to the water inlet (21). The outer surface of the water inlet pipe (3) has multiple sets of through holes. The water inlet pipe (3) is equipped with a stirring component for stirring the water source.

2. The waste heat recovery device for a steam boiler according to claim 1, characterized in that: The stirring assembly includes multiple sets of rings (4) rotatably mounted on the water inlet pipe (3), multiple sets of connecting rods (42) are fixedly installed between the multiple sets of rings (4), and multiple sets of stirring rods (41) are fixedly installed on the multiple sets of rings (4). The heat exchange tank (1) is provided with a driving assembly for controlling the rotation of the multiple sets of rings (4).

3. The waste heat recovery device for a steam boiler according to claim 2, characterized in that: The ends of the connecting rods (42) of the multiple sets are fixedly installed with a first gear (43), and the first gear (43) rotates to be sleeved on the outer surface of the water inlet pipe (3), and the first gear (43) meshes with the drive assembly.

4. The waste heat recovery device for a steam boiler according to claim 2, characterized in that: The drive assembly includes a motor (7) mounted on the side wall of the water tank (2), the output shaft of the motor (7) passing through the side wall of the water tank (2) and extending into its interior, and a second gear (72) fixedly mounted at the end of the output shaft, the second gear (72) meshing with the first gear (43).

5. A steam boiler waste heat recovery device according to claim 4, characterized in that: A sealing rubber gasket (71) is fixedly installed between the motor (7) and the water tank (2), and the sealing rubber gasket (71) is sleeved on the outside of the output shaft of the motor (7).

6. The waste heat recovery device for a steam boiler according to claim 1, characterized in that: A pressure gauge (11) is installed at the top of the heat exchange tank (1).

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