Waste heat recovery heat exchanger for boiler energy conservation

Abstract

The utility model relates to the related technical field of single crystal furnaces, in particular to a waste heat recovery heat exchanger for boiler energy conservation, which comprises a body used for carrying out waste heat recovery on a boiler, an air inlet is fixed on one side of the body, a support frame is fixed on the inner wall of the air inlet, and a plurality of groups of clamping rods are fixed on one side of the support frame; the filter plate is clamped on the outer side of the clamping rod and is used for filtering the recovered flue gas; according to the heat exchanger, the filter plate is clamped on the outer side of the clamping rod, the filter plate is installed, smoke entering the body is filtered through the filter plate, the problem that dust in the smoke affects work of the heat exchanger is avoided, compressed air is blown out through the air compressor, and therefore the heat exchanger is not prone to falling off, and the service life of the heat exchanger is prolonged. Compressed air is blown into the body through the air outlet pipe and the connecting pipe, dust attached to the heat pipe in the body is cleaned and blown, and the problems in the prior art are solved.

Description

Technical Field

[0001] This utility model relates to the technical field of single crystal furnaces, and in particular to a waste heat recovery heat exchanger for boiler energy saving. Background Technology

[0002] A boiler is an energy conversion device that converts chemical energy into thermal energy by burning fuel to produce steam or hot water. As a key piece of equipment in industrial production and people's lives, its core function is to provide thermal energy support: in the industrial field, boilers provide heat sources for processes such as metal processing, chemical reactions, and power generation, driving the operation of production equipment.

[0003] Waste heat recovery heat exchangers are highly efficient and energy-saving heat exchange devices that play an important role in boiler energy conservation. Heat exchangers can capture heat from the high-temperature flue gas emitted by the boiler and transfer it to water or other media, thereby improving energy utilization efficiency. For example, in thermal power plants, heat exchangers can be used to recover waste heat from boiler flue gas, which can preheat boiler feedwater and improve power generation efficiency. Through waste heat recovery, heat exchangers reduce the demand for primary energy, thereby reducing fuel consumption and production costs.

[0004] In existing technologies, boiler flue gas typically enters the heat exchanger through the air inlet for heat exchange. However, the air inlet lacks a dustproof structure. When dust-laden flue gas flows at high speed, dust particles can scour the metal surface of the heat exchanger, causing the tube walls to thin. Long-term wear may lead to leaks. Dust in the flue gas can also enter the heat exchanger, potentially clogging the flow channels and reducing the effective flow area. This increases the flow resistance of the flue gas, forcing the fan to increase its power to maintain the flue gas flow rate, further increasing energy consumption. Furthermore, the heat exchanger lacks a cleaning function, leading to ash accumulation inside after prolonged use. Ash accumulation and corrosion can work together to cause failure of the heat exchanger tube bundles, welded joints, or plates. Ash accumulation can also hinder heat transfer, causing abnormal local temperature increases in the heat exchanger. High temperatures can soften and deform the equipment materials, and may even cause tube rupture or combustion. Utility Model Content

[0005] The purpose of this utility model is to provide a waste heat recovery heat exchanger for boiler energy saving, so as to solve the problems mentioned in the background art.

[0006] The technical solution adopted in this utility model is:

[0007] A waste heat recovery heat exchanger for boiler energy saving includes:

[0008] The main body is used to recover waste heat from the boiler. An air inlet is fixed on one side of the main body, and a support frame is fixed on the inner wall of the air inlet. Multiple sets of clamps are fixed on one side of the support frame.

[0009] A filter plate, snapped onto the outside of the lever, is used to filter the recovered flue gas;

[0010] A support plate is installed on the top of the main body, and an air compressor is installed on the top of the support plate to compress air to blow soot from the inside of the main body.

[0011] The housing is fixed to the top of the support plate. The support plate has a drive component inside. The inner wall of the housing is rotatably connected to a connecting pipe. The outer side of the connecting pipe is connected to multiple sets of air hoods for blowing soot inside the housing.

[0012] Optionally, an air inlet cover is fixed to the outside of the air inlet by bolts, and an air inlet duct is fixed to one side of the air inlet cover.

[0013] Optionally, the inner wall of the air inlet hood is fixed with a limiting plate for limiting the position of the filter plate, and a sealing gasket is provided on one side of the limiting plate, the sealing gasket being made of rubber.

[0014] Optionally, a piezoelectric sensor is installed at the bottom of the main body, and an air outlet pipe is connected to the air compressor's outlet end.

[0015] Optionally, the driving component includes a drive motor fixed to the top of the housing, a drive rod fixed to the output end of the drive motor, and a first gear fixed to the outer side of the drive rod.

[0016] Optionally, the driving component further includes a second gear meshing with the outside of the first gear for driving the connecting pipe to rotate, and one end of the connecting pipe is provided with a rotary joint.

[0017] Optionally, an air outlet is installed on one side of the main body, and a first mounting bracket for installing the air outlet is fixed to the outside of the main body by bolts, and a second mounting bracket is fixed to the outside of the main body by bolts.

[0018] Optionally, an inlet pipe and an outlet pipe are respectively provided on the outer side of the main body, and sound insulation cotton for noise reduction of the main body is provided at the bottom of the support plate.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] The filter plate is installed by clipping it onto the outside of the clamp rod. The filter plate filters the flue gas entering the main body, preventing dust in the flue gas from affecting the operation of the heat exchanger. Compressed air is blown out by an air compressor and blown into the main body through the outlet pipe and connecting pipe to clean the dust attached to the heat pipe inside the main body, preventing dust from affecting the heat exchange efficiency. By using a rotary joint, the connecting pipe can be rotated without affecting the gas flow inside the outlet pipe and connecting pipe, thereby adjusting the air outlet angle of the air hood and improving the dust cleaning range of the main body. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the main body in this application;

[0023] Figure 2 This is a schematic diagram of the internal structure of the main body in this application;

[0024] Figure 3 This is a schematic diagram of the structure on the outer side of the main body in this application;

[0025] Figure 4 This is a schematic diagram of the drive component in this application;

[0026] Figure 5 This is a schematic diagram of the air inlet structure in this application.

[0027] Figure label:

[0028] 1. Main body; 2. Air inlet; 3. Support frame; 4. Clamping rod; 5. Filter plate; 6. Support plate; 7. Air compressor; 8. Housing;

[0029] 9. Driving component; 91. Drive motor; 92. Drive rod; 93. First gear; 94. Second gear; 95. Rotary joint;

[0030] 10. Connecting pipe; 11. Exhaust hood; 12. Inlet hood; 13. Inlet duct; 14. Limiting plate; 15. Sealing gasket;

[0031] 16. Piezoelectric sensor; 17. Air outlet pipe; 18. Air vent; 19. First mounting bracket; 20. Second mounting bracket; 21. Water inlet pipe; 22. Water outlet pipe; 23. Sound insulation cotton. Detailed Implementation

[0032] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In current technology, boiler flue gas typically enters the heat exchanger through the air inlet for heat exchange. However, the air inlet lacks a dustproof structure. When dust-laden flue gas flows at high speed, dust particles can scour the metal surface of the heat exchanger, causing the tube walls to thin. Long-term wear may lead to leaks. Dust in the flue gas can also enter the heat exchanger, potentially clogging the flow channels and reducing the effective flow area. This increases the flow resistance of the flue gas, forcing the fan to increase its power to maintain the flue gas flow, further increasing energy consumption. Furthermore, the heat exchanger lacks a cleaning function, leading to ash accumulation inside over time. Ash accumulation and corrosion can work together to cause failure of the heat exchanger tube bundles, welded joints, or plates. Ash accumulation also hinders heat transfer, causing abnormal local temperature increases in the heat exchanger. High temperatures can soften and deform the equipment materials, and may even lead to tube rupture or combustion.

[0035] like Figure 1-5 As shown, this utility model embodiment provides a waste heat recovery heat exchanger for boiler energy saving, including a body 1 for recovering waste heat from the boiler. An air inlet 2 is fixed on one side of the body 1, and a support frame 3 is fixed on the inner wall of the air inlet 2. Multiple sets of clamps 4 are fixed on one side of the support frame 3.

[0036] The filter plate 5 is snapped onto the outside of the lever 4 and is used to filter the recovered flue gas.

[0037] Support plate 6 is installed on the top of body 1. Air compressor 7 is installed on the top of support plate 6 for compressing air to blow soot inside body 1.

[0038] The housing 8 is fixed to the top of the support plate 6. The support plate 6 has a drive component 9 inside. The inner wall of the housing 8 is rotatably connected to a connecting pipe 10. The outer side of the connecting pipe 10 is connected to multiple sets of air hoods 11 for blowing soot inside the main body 1.

[0039] In use, the filter plate 5 is clipped onto the outside of the clamp 4 to install the filter plate 5. The filter plate 5 filters the flue gas entering the body 1, preventing dust in the flue gas from affecting the operation of the heat exchanger. The air compressor 7 is existing technology. The air compressor 7 compresses air through its internal compression device to generate a high-pressure airflow. When blowing air is required, the air compressor 7 releases the compressed air through pipes or blower accessories to form a strong airflow. It will not be elaborated here. The compressed air is blown out by the air compressor 7 and blown into the body 1 through the connecting pipe 10 and the air outlet hood 11 to clean and blow away the dust attached to the heat pipes inside the body 1, preventing dust from affecting the heat exchange effect of the body 1. The connecting pipe 10 is divided into two pipes. One pipe is rotatably connected to the inner wall of the housing 8, and the other pipe is rotatably connected to the inner wall of the air inlet 2. The two pipes are installed through a connector, which facilitates the subsequent disassembly of the two pipes.

[0040] Specifically, an air inlet cover 12 is fixed to the outside of the air inlet 2 by bolts, and an air inlet duct 13 is fixed to one side of the air inlet cover 12.

[0041] Boiler flue gas enters the body 1 through the air inlet hood 12, heating the heat pipes inside the body 1. The flue gas is then guided through the air inlet duct 13, which is cylindrical to facilitate subsequent connection with the boiler air duct.

[0042] Specifically, the inner wall of the air inlet hood 12 is fixed with a limiting plate 14 for limiting the filter plate 5, and a sealing gasket 15 is provided on one side of the limiting plate 14. The sealing gasket 15 is made of rubber.

[0043] The air inlet shroud 12 is installed on the outside of the air inlet 2 by bolts, so that the limiting plate 14 is locked on one side of the filter plate 5 to limit the filter plate 5 and prevent the filter plate 5 from falling off. The sealing gasket 15 improves the sealing of the air inlet 2 and prevents the leakage of flue gas and heat.

[0044] Specifically, a piezoelectric sensor 16 is installed at the bottom of the main body 1, and an air outlet pipe 17 is connected to the air outlet end of the air compressor 7.

[0045] The piezoelectric sensor 16 is a prior art device that can convert mechanical energy into electrical energy. It works based on the piezoelectric effect. When a piezoelectric material is subjected to an external force, it generates an electric charge. The magnitude of the charge is proportional to the external force. This type of sensor is often used to measure physical quantities such as pressure, acceleration, and vibration. Dust accumulation can change the internal vibration characteristics of a heat exchanger. The detection head of the piezoelectric sensor 16 is attached to the inside of the heat exchanger and converts the vibration into an electrical signal. The degree of dust accumulation is assessed by analyzing the signal changes. This will not be elaborated on here. The degree of dust accumulation inside the body 1 is monitored by the piezoelectric sensor 16.

[0046] Specifically, the driving component 9 includes a drive motor 91 fixed to the top of the housing 8, a drive rod 92 fixed to the output end of the drive motor 91, and a first gear 93 fixed to the outside of the drive rod 92.

[0047] The drive motor 91 can drive the drive rod 92 to rotate, causing the first gear 93 to rotate, which facilitates the subsequent rotation of the connecting pipe 10, thereby adjusting the air outlet angle of the air outlet shroud 11 and improving the dust removal range of the main body 1.

[0048] Specifically, the driving component 9 also includes a second gear 94 meshing with the outside of the first gear 93 for driving the connecting pipe 10 to rotate, and a rotary joint 95 is provided at one end of the connecting pipe 10.

[0049] The second gear 94 is fixed on the outside of the connecting pipe 10. The air outlet pipe 17 is connected to the connecting pipe 10 through the rotary joint 95. The rotation of the first gear 93 drives the second gear 94 and the connecting pipe 10 to rotate. The rotary joint 95 allows the connecting pipe 10 to rotate without affecting the gas flow inside the air outlet pipe 17 and the connecting pipe 10.

[0050] Specifically, an air outlet 18 is installed on one side of the main body 1, a first mounting bracket 19 for installing the air outlet 18 is fixed to the outside of the main body 1 by bolts, and a second mounting bracket 20 is fixed to the outside of the main body 1 by bolts.

[0051] The air outlet 18 can be installed on one side of the main body 1 by means of the first mounting bracket 19, and the support plate 6 can be fixed on the top of the main body 1 by means of the second mounting bracket 20, which facilitates the subsequent disassembly of the air outlet 18 and the support plate 6, thereby facilitating the internal maintenance of the main body 1.

[0052] Specifically, an inlet pipe 21 and an outlet pipe 22 are respectively provided on the outer side of the main body 1, and a sound insulation cotton 23 for noise reduction of the main body 1 is provided at the bottom of the support plate 6.

[0053] Water flows into the body 1 through the inlet pipe 21, is heated by the heat pipe inside the body 1, and is discharged through the outlet pipe 22. It can be used to preheat the boiler and achieve the effect of heat energy recovery.

[0054] In operation, boiler flue gas enters the main body 1 through the air inlet hood 12, heating the heat pipes inside the main body 1. The flue gas is then guided by the air inlet duct 13, which is cylindrical for easy connection to the boiler ductwork. Water enters the main body 1 through the water inlet pipe 21, is heated by the heat pipes inside the main body 1, and is discharged through the water outlet pipe 22. This heated water can be used to preheat the boiler, achieving heat recovery. The filter plate 5 is clipped onto the outside of the clamping rod 4 for installation. The filter plate 5 filters the flue gas entering the main body 1, preventing dust in the flue gas from affecting the heat exchanger's operation. The air inlet hood 12 is installed on the outside of the air inlet 2 using bolts, and the limiting plate 14 is clipped onto one side of the filter plate 5 to limit its position. To prevent the filter plate 5 from falling off, the sealing gasket 15 is used to improve the sealing of the air inlet 2, preventing the leakage of flue gas and heat. Compressed air is blown out by the air compressor 7 and blown into the body 1 through the air outlet pipe 17 and the connecting pipe 10 to clean the dust attached to the heat pipe inside the body 1, preventing the dust from affecting the heat exchange effect of the body 1. The drive motor 91 can drive the drive rod 92 to rotate, causing the first gear 93 to rotate. The rotation of the first gear 93 drives the second gear 94 and the connecting pipe 10 to rotate, thereby adjusting the air outlet angle of the air outlet hood 11 and improving the dust removal range of the body 1. The rotating joint 95 allows the connecting pipe 10 to rotate without affecting the gas flow inside the air outlet pipe 17 and the connecting pipe 10.

[0055] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A waste heat recovery heat exchanger for boiler energy saving, characterized in that, include: The main body (1) is used for waste heat recovery from the boiler. An air inlet (2) is fixed on one side of the main body (1). A support frame (3) is fixed on the inner wall of the air inlet (2). Multiple sets of clamps (4) are fixed on one side of the support frame (3). A filter plate (5) is clamped to the outside of the clamps (4) and is used to filter the recovered flue gas. A support plate (6) is installed on the top of the main body (1). An air compressor (7) is installed on the top of the support plate (6) and is used to compress air to blow soot inside the main body (1). A box (8) is fixed on the top of the support plate (6). A drive component (9) is provided inside the support plate (6). A connecting pipe (10) is rotatably connected to the inner wall of the box (8). Multiple sets of air hoods (11) for blowing soot inside the main body (1) are connected to the outside of the connecting pipe (10).

2. The waste heat recovery heat exchanger for boiler energy saving according to claim 1, characterized in that, An air inlet cover (12) is fixed to the outside of the air inlet (2) by bolts, and an air inlet tube (13) is fixed to one side of the air inlet cover (12).

3. The waste heat recovery heat exchanger for boiler energy saving according to claim 2, characterized in that, The inner wall of the air inlet hood (12) is fixed with a limiting plate (14) for limiting the filter plate (5). A sealing gasket (15) is provided on one side of the limiting plate (14), and the sealing gasket (15) is made of rubber.

4. The waste heat recovery heat exchanger for boiler energy saving according to claim 1, characterized in that, A piezoelectric sensor (16) is installed at the bottom of the body (1), and an air outlet pipe (17) is connected to the air outlet end of the air compressor (7).

5. The waste heat recovery heat exchanger for boiler energy saving according to claim 1, characterized in that, The driving component (9) includes a drive motor (91) fixed to the top of the housing (8), and a drive rod (92) is fixed to the output end of the drive motor (91). A first gear (93) is fixed to the outside of the drive rod (92).

6. The waste heat recovery heat exchanger for boiler energy saving according to claim 5, characterized in that, The driving component (9) also includes a second gear (94) meshing with the outside of the first gear (93) for driving the connecting pipe (10) to rotate, and a rotary joint (95) is provided at one end of the connecting pipe (10).

7. The waste heat recovery heat exchanger for boiler energy saving according to claim 1, characterized in that, An air outlet (18) is installed on one side of the main body (1), and a first mounting bracket (19) for installing the air outlet (18) is fixed to the outside of the main body (1) by bolts. A second mounting bracket (20) is fixed to the outside of the main body (1) by bolts.

8. The waste heat recovery heat exchanger for boiler energy saving according to claim 1, characterized in that, The outer side of the main body (1) is provided with an inlet pipe (21) and an outlet pipe (22), and the bottom of the support plate (6) is provided with sound insulation cotton (23) for noise reduction of the main body (1).

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