Boiler air feeder inlet air pressure increasing device

Abstract

The utility model belongs to the technical field of boiler blower pipelines, and relates to a boiler blower inlet air pressure increasing device which comprises an air cavity, an air supply duct is arranged on the top of the air cavity, an air inlet pipe is arranged on the front side of the air cavity, an axial flow fan is arranged on the front side of the air inlet pipe, and an impeller is arranged in the air cavity and connected with a motor through a connecting shaft. And the front side of the transmission shaft is connected with an axial flow fan. According to the utility model, the air inlet amount is increased by utilizing the pressurization effect of the axial flow fan, so that the oxygen content required by combustion of the boiler is sufficient, and the boiler is ensured to have sufficient oxygen supply.

Description

Technical Field

[0001] The utility model belongs to the technical field of furnace fan pipelines, and particularly relates to a device for increasing the inlet air pressure of a boiler forced draft fan. Background Technique

[0002] The main function of a boiler forced draft fan is to send external air into the boiler to maintain the oxygen content in the furnace and promote fuel combustion. The boiler forced draft fan sucks in air and compresses it before sending it into the combustion chamber to ensure the stability and efficiency of boiler combustion. In addition, the forced draft fan can also improve the combustion efficiency of fuel. By adjusting the air volume and air velocity, the fuel can be fully burned, reducing the combustion residues and carbon dioxide emissions. At the same time, the boiler forced draft fan can also reduce the generation of pollutants and protect the environment.

[0003] In the high-temperature environment of hot summer, especially after being irradiated by sunlight for a long time near the ground surface, the temperature rises sharply, and the air density decreases significantly compared with the daily working environment. As a result, the efficiency of the forced draft fan decreases, and the oxygen content required for boiler combustion is insufficient, which will directly affect the boiler operating conditions, leading to unstable combustion conditions in the furnace, increased exhaust gas temperature, increased heat loss, and reduced boiler thermal efficiency.

[0004] Therefore, a device for increasing the inlet air pressure of a boiler forced draft fan is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a device for increasing the inlet air pressure of a boiler forced draft fan, which has the function of increasing the inlet air pressure of the boiler forced draft fan, and solves the problems in the prior art that the air density decreases in a high-temperature environment, the efficiency of the forced draft fan decreases, the oxygen content required for boiler combustion is insufficient, which will directly affect the boiler operating conditions, leading to unstable combustion conditions in the furnace, increased exhaust gas temperature, increased heat loss, and reduced boiler thermal efficiency.

[0006] To achieve the above purpose, the technical scheme adopted by the utility model is that the utility model provides a device for increasing the inlet air pressure of a boiler forced draft fan, including an air chamber. A air supply duct is arranged at the top of the air chamber, an intake pipe is arranged at the front side of the air chamber, an axial flow fan is arranged at the front side of the intake pipe, an impeller is arranged inside the air chamber, the impeller is connected to a motor through a coupling, a transmission shaft is arranged on the coupling, and the front side of the transmission shaft is connected to the axial flow fan.

[0007] Preferably, a sound-absorbing layer is arranged on the inner wall of the intake pipe, and the sound-absorbing layer is a sound-absorbing material.

[0008] Preferably, an output gear is arranged on the coupling, a transmission gear is arranged on the transmission shaft, and the output gear is meshed and connected with the transmission gear.

[0009] Preferably, a speed-changing gear is arranged on the front side of the transmission shaft, and the transmission shaft is connected to the axial flow fan through the speed-changing gear.

[0010] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0011] 1. The present utility model utilizes the pressurization effect of the axial flow fan to increase the air intake volume, so that the oxygen content required for boiler combustion is sufficient, ensuring an adequate supply of oxygen for the boiler;

[0012] 2. The present utility model has the function of improving the inlet air pressure of the boiler forced draft fan, solving the problems in the prior art that the air density in the high-temperature environment decreases, the efficiency of the forced draft fan decreases, the oxygen content required for boiler combustion is insufficient, which will directly affect the boiler operating conditions, resulting in unstable combustion conditions in the furnace, increasing the exhaust gas temperature, increasing heat loss, and reducing the boiler thermal efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 It is a schematic structural diagram of a device for improving the inlet air pressure of a boiler forced draft fan;

[0015] In the above figures, 1. air cavity, 2. air duct, 3. intake pipe, 4. impeller, 5. coupling shaft, 6. motor, 7. output gear, 8. transmission gear, 9. transmission shaft, 10. speed change gear, 11. axial flow fan. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] In order to better understand the above objects, features and advantages of the present utility model, the following will further illustrate the present utility model in conjunction with the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0017] In the following description, many specific details are set forth to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0018] Embodiment 1, as Figure 1As shown in the figure, a device for increasing the inlet air pressure of a boiler forced draft fan includes an air chamber 1. The air chamber 1 serves to accommodate and connect, and through the air chamber 1, external air can be sent into the boiler. A air supply duct 2 is provided at the top of the air chamber 1. The air supply duct 2 guides the air entering the air chamber 1 to be sent from the air chamber 1 into the combustion chamber, ensuring the stability and efficiency of combustion. An intake pipe 3 is provided on the front side of the air chamber 1. The intake pipe 3 is used to receive the entry of external air. An axial flow fan 11 is provided on the front side of the intake pipe 3. The axial flow fan 11 provides a pressurizing effect, increasing the air intake volume of the intake pipe 3 and ensuring sufficient supply of oxygen required for boiler combustion.

[0019] An impeller 4 is provided inside the air chamber 1. The impeller 4 sucks in air through rotation, increasing the air intake volume, ensuring the supply of oxygen required for boiler combustion, capable of increasing the air flow velocity and enhancing the air supply effect. The impeller 4 is connected to a motor 6 through a coupling 5. The motor 6 can drive the impeller 4 to rotate. The coupling 5 connects the motor 6 and the impeller 4. A transmission shaft 9 is provided on the coupling 5. The coupling 5 drives the transmission shaft 9 to rotate. The front side of the transmission shaft 9 is connected to the axial flow fan 11. The transmission shaft 9 drives the axial flow fan 11 to rotate, making full use of the power of the motor 6 and sending more air volume in front of the intake pipe through the axial flow fan 11.

[0020] The following specifically describes the specific designs of the above key components:

[0021] A sound-absorbing layer is provided on the inner wall of the intake pipe 3. The sound-absorbing layer is a sound-absorbing material. The sound-absorbing layer is used to absorb and reduce the noise generated by air flow, can effectively reduce noise pollution, and improve the environmental adaptability of the equipment.

[0022] An output gear 7 is provided on the coupling 5. A transmission gear 8 is provided on the transmission shaft 9. The output gear 7 is meshed and connected with the transmission gear 8. The output gear 7 rotates following the coupling 5, responsible for transmitting power to the transmission shaft 9. The transmission gear 8 is provided on the transmission shaft 9, meshed with the output gear 7, receiving and transmitting power, enabling the transmission shaft 9 to receive the power of the coupling 5 and rotate.

[0023] A speed-changing gear 10 is provided on the front side of the transmission shaft 9. The transmission shaft 9 is connected to the axial flow fan 11 through the speed-changing gear 10. The speed-changing gear 10 rotates following the transmission shaft 9, responsible for transmitting power to the axial flow fan 11. The axial flow fan 11 is correspondingly provided with a gear that meshes with the speed-changing gear 10 to receive power. The speed-changing gear 10 can adjust the rotation speed of the axial flow fan 11 according to the actual required gear ratio to adapt to the needs of different working conditions.

[0024] All the standard parts used in the present utility model can be purchased from the market. The special-shaped parts can be customized according to the descriptions in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, welding, etc. that are mature in the prior art. The machines, parts and equipment all adopt conventional models in the prior art. In addition, the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0025] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present utility model, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A device for increasing the air pressure at the inlet of a boiler blower, characterized in that: It includes an air cavity, an air supply duct is arranged on the top of the air cavity, an air inlet pipe is arranged on the front side of the air cavity, an axial flow fan is arranged on the front side of the air inlet pipe, an impeller is arranged inside the air cavity, the impeller is connected to the motor through a coupling, a transmission shaft is arranged on the coupling, and the front side of the transmission shaft is connected to the axial flow fan.

2. A boiler blower inlet air pressure increasing device according to claim 1, characterized in that: The inner wall of the air intake pipe is provided with a sound-absorbing layer, which is made of sound-absorbing material.

3. The boiler blower inlet air pressure increasing device according to claim 1, characterized in that: The coupling shaft is provided with an output gear, the transmission shaft is provided with a transmission gear, and the output gear is meshedly connected with the transmission gear.

4. A boiler blower inlet air pressure increasing device according to claim 1, characterized in that: A speed gear is arranged on the front side of the transmission shaft, and the transmission shaft is connected to the axial flow fan via the speed gear.

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