Energy-saving air supply system for boiler burner

Abstract

The utility model discloses an energy-saving air supply system for a boiler burner, which comprises a boiler provided with a chimney used for discharging flue gas and an air inlet used for providing boiler combustion inlet air; the first air inlet is communicated with the air inlet through a first air duct; the first heat exchanger is arranged on the chimney; the second heat exchanger is arranged on the first air duct; an outlet of the water tank is communicated with an inlet of the first heat exchanger through a circulating pump, an outlet of the first heat exchanger is communicated with an inlet of the second heat exchanger, and an outlet of the second heat exchanger is communicated with an inlet of the water tank. Energy consumption in the combustion process of fuel in the boiler is reduced, and energy is saved.

Description

Technical Field

[0001] The utility model belongs to the field of boiler air supply equipment, and specifically relates to an air supply system for energy saving of a boiler burner. Background Art

[0002] In the prior art, a large amount of heat is generated during boiler combustion, and the flue gas generated by combustion is discharged through the chimney of the boiler. A large amount of heat is carried in the flue gas discharged from the boiler chimney. If these heats are directly discharged into the atmosphere, it will cause waste of energy. On the other hand, a large amount of oxygen is required for boiler combustion, so air needs to be continuously supplied to the boiler. Since the boiler performs work through the heat energy generated by combustion, the furnace temperature of the boiler needs to be ensured to reduce heat loss. Traditional boiler air supply is to transport natural air, that is, normal temperature air, to participate in combustion, which increases the energy consumption during the fuel combustion process in the boiler and wastes fuel.

[0003] In view of this, the present utility model is specifically proposed. Content of the Utility Model

[0004] The technical problem to be solved by the present utility model is to overcome the deficiencies of the prior art and provide an air supply system for energy saving of a boiler burner.

[0005] To solve the above technical problem, the basic concept of the technical solution adopted by the present utility model is:

[0006] An air supply system for energy saving of a boiler burner, comprising:

[0007] A boiler, which is provided with a chimney for flue gas discharge and an air inlet for providing air intake for boiler combustion;

[0008] A first air inlet, which is communicated with the air inlet through a first air duct;

[0009] A first heat exchanger, which is arranged on the chimney;

[0010] A second heat exchanger, which is arranged on the first air duct;

[0011] A water tank, the outlet of the water tank is communicated with the inlet of the first heat exchanger through a circulation pump, the outlet of the first heat exchanger is communicated with the inlet of the second heat exchanger, and the outlet of the second heat exchanger is communicated with the inlet of the water tank.

[0012] Further, the first air inlet is communicated with a blower through a second air duct, the blower is communicated with a blower through the first air duct, and the air outlet of the blower is communicated with the air inlet.

[0013] Further, a pressure sensor is arranged on the first air duct.

[0014] In some alternative embodiments, a second air inlet is provided on the first air duct.

[0015] Furthermore:

[0016] A first sound insulation protective cover is provided at the first air inlet, and the first sound insulation protective cover is spaced from the first air inlet;

[0017] A second sound insulation protective cover is provided at the second air inlet, and the second sound insulation protective cover is spaced from the second air inlet.

[0018] Furthermore, the first sound insulation protective cover is provided with a plurality of first holes, and the total area of the plurality of first holes is larger than the area of the first air inlet.

[0019] Furthermore, the second sound insulation protective cover is provided with a plurality of second holes, and the total area of the plurality of second holes is larger than the area of the second air inlet.

[0020] In some alternative embodiments, the circulation pump is communicated with the inlet of the first heat exchanger through a first pipeline, and a first temperature sensor is provided on the first pipeline.

[0021] In some alternative embodiments, the outlet of the first heat exchanger is communicated with the inlet of the second heat exchanger through a second pipeline, and a second temperature sensor is provided on the second pipeline.

[0022] In some alternative embodiments, the outlet of the second heat exchanger is communicated with the inlet of the water tank through a third pipeline, and a third temperature sensor is provided on the third pipeline.

[0023] After adopting the above technical solution, the present utility model has the following beneficial effects compared with the prior art.

[0024] The present utility model provides a air supply system for energy saving of a boiler burner. By respectively installing a first heat exchanger and a second heat exchanger on the chimney and the first air duct of the boiler, the water in the water tank is heat-exchanged with the flue gas through the first heat exchanger on the chimney by a circulation pump. The heated hot water is then heat-exchanged with the normal-temperature air flow in the first air duct through the second heat exchanger on the first air duct. The hot air after absorbing heat then enters the boiler to participate in combustion, reducing the energy consumption during the fuel combustion process in the boiler. By continuously repeating this cycle, not only energy is saved, but also the adverse impact on the environment is reduced.

[0025] The following further describes in detail the specific embodiments of the present utility model with reference to the accompanying drawings. Description of the Drawings

[0026] The accompanying drawings, as a part of the present utility model, are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model, but do not constitute an improper limitation to the present utility model. Obviously, the accompanying drawings in the following description are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0027] Figure 1 is a schematic diagram of a air supply system for energy saving of a boiler burner provided by the present utility model.

[0028] In the figure: 1. Boiler; 2. Butterfly valve; 3. First heat exchanger; 4. Chimney; 5. First valve; 6. Second valve; 7. Second temperature sensor; 8. First temperature sensor; 9. First pipeline; 10. Circulation pump; 11. Water tank; 12. Third pipeline; 13. Third valve; 14. Third temperature sensor; 15. Fourth valve; 16. First air inlet; 17. First sound insulation protective cover; 18. First hole; 19. Air blower; 20. Second air duct; 21. Second heat exchanger; 22. Pressure sensor; 23. First air duct; 24. Blower; 25. Second hole; 26. Second sound insulation protective cover; 27. Second air inlet; 28. Second pipeline.

[0029] It should be noted that these drawings and text descriptions are not intended to limit the scope of the concept of the present utility model in any way, but to illustrate the concept of the present utility model to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0032] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] As Figure 1 shown, the present utility model provides an air supply system for energy saving of a burner of a boiler 1. The air supply system for energy saving of the burner of the boiler 1 includes:

[0034] The boiler 1 is provided with a chimney 4 for flue gas discharge and an air inlet for supplying combustion air to the boiler 1.

[0035] The first air inlet 16 is communicated with the air inlet through the first air duct 23.

[0036] The first heat exchanger 3 is arranged on the chimney 4.

[0037] The second heat exchanger 21 is arranged on the first air duct 23.

[0038] The water tank 11 has its outlet communicated with the inlet of the first heat exchanger 3 through the circulation pump 10. The outlet of the first heat exchanger 3 is communicated with the inlet of the second heat exchanger 21, and the outlet of the second heat exchanger 21 is communicated with the inlet of the water tank 11.

[0039] Specifically, the flue gas generated by the boiler 1 enters the chimney 4 through the butterfly valve 2 and is discharged outdoors. The first heat exchanger 3 is arranged on the chimney 4. The water tank 11 is used for storing water, and the outlet of the water tank 11 is communicated with the inlet of the first heat exchanger 3 through the circulation pump 10.

[0040] The circulation pump 10 supplies the water in the water tank 11 to the first heat exchanger 3. The high-temperature flue gas in the chimney 4 transfers heat to the water in the first heat exchanger 3 through the first heat exchanger 3, and the cooled flue gas is then discharged outdoors through the chimney 4. The outlet of the first heat exchanger 3 is connected to the inlet of the second heat exchanger 21. Through the action of the circulation pump 10, the heated hot water in the first heat exchanger 3 enters the second heat exchanger 21. The second heat exchanger 21 is arranged on the first air duct 23. Since the first air inlet 16 is connected to the air inlet through the first air duct 23, the heated hot water exchanges heat with the normal-temperature air flow in the first air duct 23 through the second heat exchanger 21 on the first air duct 23, and the heated hot air then enters the boiler 1 to participate in combustion, reducing the energy consumption during the fuel combustion process in the boiler 1. In this way, the cycle continues, not only saving energy but also reducing the adverse impact on the environment. Through the action of the circulation pump 10, the outlet of the second heat exchanger 21 is connected to the inlet of the water tank 11. After the heat of the hot water is absorbed by the normal-temperature air flow in the first air duct 23 and the temperature is reduced, the hot water flows out of the second heat exchanger 21 and enters the water tank 11, so that the medium water circulates continuously. The heat of the flue gas of the boiler 1 is transferred to the air supply of the boiler 1 through the medium water, so that the temperature of the flue gas continues to decrease and the air supply temperature of the boiler 1 continues to increase, saving energy and protecting the environment.

[0041] Further, the first air inlet 16 is connected to the air blower 19 through the second air duct 20, the air blower 19 is connected to the air blower 24 through the first air duct 23, and the air outlet of the air blower 24 is connected to the air inlet.

[0042] The air blower 19 and the air blower 24 can provide air flow power, so that air quickly enters the boiler 1 through the first air inlet 16 to supply sufficient combustion of the fuel in the boiler 1.

[0043] In some alternative embodiments, a pressure sensor 22 is arranged on the first air duct 23.

[0044] The pressure sensor 22 can monitor the air pressure in the first air duct 23 and judge the air intake flow of the boiler 1.

[0045] In some alternative embodiments, a second air inlet 27 is arranged on the first air duct 23.

[0046] The second air inlet 27 can avoid the risk of insufficient air volume in the boiler 1. Fresh air can enter the first air duct 23 through the second air inlet 27 and be sent into the boiler 1 by the air blower 24 to participate in combustion.

[0047] Further, a first sound insulation protective cover 17 is arranged at the first air inlet 16, and the first sound insulation protective cover 17 is arranged at an interval from the first air inlet 16;

[0048] A second sound insulation protective cover 26 is arranged at the second air inlet 27, and the second sound insulation protective cover 26 is arranged at an interval from the second air inlet 27.

[0049] The first sound insulation protective cover 17 can insulate and protect the first air inlet 16.

[0050] The second sound insulation protective cover 26 can insulate and protect the second air inlet 27.

[0051] Furthermore, the first sound insulation protective cover 17 is provided with a plurality of first holes 18, and the total area of the plurality of first holes 18 is larger than the area of the first air inlet 16.

[0052] In this way, the first sound insulation protective cover 17 not only plays a role in protection and sound insulation, but also does not affect the air intake volume of the first air inlet 16.

[0053] Furthermore, the second sound insulation protective cover 26 is provided with a plurality of second holes 25, and the total area of the plurality of second holes 25 is larger than the area of the second air inlet 27.

[0054] In this way, the second sound insulation protective cover 26 not only plays a role in protection and sound insulation, but also does not affect the air intake volume of the second air inlet 27.

[0055] In some alternative embodiments, the circulation pump 10 is connected to the inlet of the first heat exchanger 3 through the first pipeline 9, and a first temperature sensor 8 is provided on the first pipeline 9.

[0056] The first temperature sensor 8 is used to monitor the temperature of the water in the first pipeline 9.

[0057] In some alternative embodiments, the outlet of the first heat exchanger 3 is connected to the inlet of the second heat exchanger 21 through the second pipeline 28, and a second temperature sensor 7 is provided on the second pipeline 28.

[0058] The second temperature sensor 7 is used to monitor the temperature of the water in the second pipeline 28.

[0059] In some alternative embodiments, the outlet of the second heat exchanger 21 is connected to the inlet of the water tank 11 through the third pipeline 12, and a third temperature sensor 14 is provided on the third pipeline 12.

[0060] The third temperature sensor 14 is used to monitor the temperature of the water in the third pipeline 12.

[0061] The following takes a specific embodiment as an example, as Figure 1 shown:

[0062] Air supply process: Fresh air can enter through the first hole 18 on the first soundproof protective cover 17, pass through the first air inlet 16, the second air duct 20, the air blower 19, and enter the second heat exchanger 21. After the normal-temperature fresh air absorbs the heat of the hot water in the second heat exchanger 21 and warms up, the hot air enters the boiler 1 through the first air duct 23 and the blower 24 to participate in the combustion to produce steam. Since the air supply temperature is higher than the normal-temperature outdoor fresh air, fuel is saved during the fuel combustion process. A second air inlet 27 and a pressure sensor 22 are provided on the first air duct 23 at the front end of the boiler 1. Since the first air duct 23 for air supply may be relatively long, and the second heat exchanger 21 is installed on the first air duct 23 for air supply, which has a certain air resistance, and the operating load of the boiler 1 may change continuously, the air supply volume and the fuel ratio of the boiler 1 must be matched. Therefore, the air blower 19 operates with variable frequency according to the wind pressure detected by the pressure sensor 22, so that the air supply volume matches the combustion load of the boiler 1. To prevent insufficient air volume, the blower 24 at the front end of the boiler 1 changes according to the operating load of the boiler 1. When the load of the boiler 1 suddenly changes greatly or the air blower 19 fails and other reasons cause insufficient air volume in the first air duct 23 for air supply, to prevent accidents such as incomplete combustion and black smoke caused by insufficient air supply (i.e., lack of oxygen) in the boiler 1, the insufficient fresh air can enter the first air duct 23 through the second air inlet 27 and be sent into the boiler 1 through the blower 24 to participate in combustion, thus avoiding the risk of insufficient air volume in the boiler 1. The first soundproof protective cover 17 and the second soundproof protective cover 26 are respectively installed on the first air inlet 16 and the second air inlet 27. The first soundproof protective cover 17 and the second soundproof protective cover 26 have the same structure and principle. They are respectively covered on the first air inlet 16 and the second air inlet 27, and there is a certain distance between the front end and the periphery and the air inlet. A plurality of first holes 18 and second holes 25 for air intake are respectively opened at the front end and the periphery. The first soundproof protective cover 17 is provided with a plurality of first holes 18, and the total area of the plurality of first holes 18 is larger than the area of the first air inlet 16.

[0063] The second soundproof protective cover 26 is provided with a plurality of second holes 25, and the total area of the plurality of second holes 25 is larger than the area of the second air inlet 27.

[0064] In this way, the first soundproof protective cover 17 and the second soundproof protective cover 26 not only play a role in protection and sound insulation, but also do not affect the air intake volume of the first air inlet 16 and the second air inlet 27.

[0065] Smoke exhaust process: The flue gas generated by the boiler 1 enters the first heat exchanger 3 on the chimney 4 through the butterfly valve 2 for heat exchange with the normal-temperature water, and the cooled flue gas is then discharged outdoors through the chimney 4.

[0066] Heat exchange process: A water tank 11 is installed in the system to buffer and cache water. When the boiler 1 operates, the circulation pump 10 also starts running. The normal-temperature water in the water tank 11 enters the first heat exchanger 3 on the chimney 4 through the circulation pump 10, the first pipeline 9, the first temperature sensor 8, and the first valve 5 to exchange heat with the flue gas and absorb the heat of the flue gas. After the heated hot water flows out of the first heat exchanger 3, it enters the second heat exchanger 21 in the first air duct 23 through the second valve 6, the second temperature sensor 7, the second pipeline 28, and the third valve 13 to exchange heat with the normal-temperature air flow in the first air duct 23. After the heat of the hot water is absorbed by the air supply and the temperature drops, it flows out of the second heat exchanger 21, the fourth valve 15, the third temperature sensor 14, and the third pipeline 12 and enters the water tank 11, thus continuously reciprocating. Through the medium water, the heat of the flue gas of the boiler 1 is transferred to the air supply of the boiler 1, so that the temperature of the flue gas continuously decreases and the temperature of the air supply of the boiler 1 continuously increases, saving energy and protecting the environment. The first temperature sensor 8 and the second temperature sensor 7 can detect the water temperature entering and leaving the first heat exchanger 3. Through the temperature values and temperature differences detected by the first temperature sensor 8 and the second temperature sensor 7, it can be judged whether the water flow of the circulation pump 10 is sufficient to cool down, and whether there are situations such as blockage and carbon accumulation in the first heat exchanger 3 that affect the heat exchange effect under the conditions of the same load and the same water volume of the boiler 1. The third temperature sensor 14 and the second temperature sensor 7 can detect the water temperature entering and leaving the second heat exchanger 21. Through the temperature values and temperature differences detected by the third temperature sensor 14 and the second temperature sensor 7, it can be judged whether the water flow of the circulation pump 10 is sufficient to heat up the air supply, and whether there are situations such as blockage and scaling in the second heat exchanger 21 that affect the heat exchange effect under the conditions of the same load and the same water volume of the boiler 1.

[0067] The utility model provides an air supply system for energy saving of the burner of the boiler 1. By respectively installing the first heat exchanger 3 and the second heat exchanger 21 on the chimney 4 and the first air duct 23 of the boiler 1, the water in the water tank 11 is exchanged with the flue gas through the first heat exchanger 3 on the chimney 4 by the circulation pump 10. The heated hot water then exchanges heat with the normal-temperature air flow in the first air duct 23 through the second heat exchanger 21 on the first air duct 23. The heated air supply then enters the boiler 1 to participate in combustion, reducing the energy consumption in the fuel combustion process in the boiler 1. By continuously reciprocating in this way, not only energy is saved, but also the adverse impact on the environment is reduced.

[0068] The above are only the preferred embodiments of the present invention, and there is no limitation to the present invention in any form. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the technical solution of the present invention, can make some changes or modifications using the technical content prompted above to form equivalent embodiments of equivalent changes. However, as long as it does not depart from the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A air supply system for energy saving of a boiler burner, characterized in that: Including: A boiler, which is provided with a chimney for flue gas discharge and an air inlet for providing combustion air intake of the boiler; A first air inlet, which is connected to the air inlet through a first air duct; A first heat exchanger, which is arranged on the chimney; A second heat exchanger, which is arranged on the first air duct; A water tank, the outlet of which is connected to the inlet of the first heat exchanger through a circulation pump, the outlet of the first heat exchanger is connected to the inlet of the second heat exchanger, and the outlet of the second heat exchanger is connected to the inlet of the water tank.

2. The air supply system for energy saving of a boiler burner according to claim 1, characterized in that: The first air inlet is connected to a blower through a second air duct, the blower is connected to a blast fan through the first air duct, and the air outlet of the blast fan is connected to the air inlet.

3. The air supply system for energy saving of a boiler burner according to claim 1, characterized in that: A pressure sensor is arranged on the first air duct.

4. The air supply system for energy saving of a boiler burner according to claim 1, characterized in that: A second air inlet is arranged on the first air duct.

5. The air supply system for energy saving of a boiler burner according to claim 4, wherein: The first air inlet is provided with a first sound insulation protective cover, and the first sound insulation protective cover is arranged at an interval from the first air inlet; The second air inlet is provided with a second sound insulation protective cover, and the second sound insulation protective cover is arranged at an interval from the second air inlet.

6. The air supply system for energy saving of a boiler burner according to claim 5, characterized in that: The first sound insulation protective cover is provided with a plurality of first holes, and the total area of the plurality of first holes is larger than the area of the first air inlet.

7. The air supply system for energy saving of a boiler burner according to claim 5, characterized in that: The second sound insulation protective cover is provided with a plurality of second holes, and the total area of the plurality of second holes is larger than the area of the second air inlet.

8. The air supply system for energy saving of a boiler burner according to claim 1, characterized in that: The circulation pump is connected to the inlet of the first heat exchanger through a first pipeline, and a first temperature sensor is arranged on the first pipeline.

9. The air supply system for energy conservation of a boiler burner according to claim 1, characterized in that: The outlet of the first heat exchanger is connected to the inlet of the second heat exchanger through a second pipeline, and a second temperature sensor is arranged on the second pipeline.

10. The air supply system for energy saving of a boiler burner according to claim 1, characterized in that: The outlet of the second heat exchanger is connected to the inlet of the water tank through a third pipeline, and a third temperature sensor is arranged on the third pipeline.

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