Smoke exhaust device and biomass boiler equipment

Abstract

The invention relates to the technical field of boiler accessory equipment, and discloses a smoke exhaust device and biomass boiler equipment. The smoke exhaust device comprises a connecting body, an air inducing assembly and a smoke exhaust pipe. The connecting main body is communicated with an exhaust pipe of the furnace body, and a mixing cavity is formed in the connecting main body; the air inducing assembly is arranged on the connecting main body and is communicated with the mixing cavity; one end of the smoke exhaust pipe communicates with the mixing cavity, and the air inducing assembly is suitable for introducing high-speed jet air into the mixing cavity so that smoke entering the mixing cavity from the exhaust pipe can be exhausted from the smoke exhaust pipe. The air inducing assembly and the smoke exhaust pipe are arranged on the connecting body, after the air inducing assembly is started, high-speed jet flow air is introduced into the mixing cavity, the high-speed jet flow air flows out of the smoke exhaust pipe, negative pressure is formed in the mixing cavity, and smoke enters the mixing cavity from the smoke exhaust pipe. According to the smoke exhaust device, high-temperature smoke of the furnace body is prevented from entering the air inducing assembly, so that the construction reliability is improved, normal operation of the air inducing assembly is guaranteed, and the safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of boiler accessory equipment, and in particular to a smoke exhaust device and biomass boiler equipment. Background Art

[0002] Biomass stoves, a key heat source for clean heating in rural areas of northern my country, offer advantages such as clean, low-carbon operation, high thermal efficiency, widespread fuel availability, a high degree of automation, and low cost. They have played a significant role in addressing air pollution caused by burning loose coal in rural areas. However, biomass stoves also present issues such as induced draft fans being prone to burnout, which can lead to smoke backflow from the silo and fires, compromising public safety. This poses significant risks to the subsequent promotion, use, and after-sales maintenance of biomass stoves.

[0003] Traditional biomass stoves rely on induced draft fans to directly draw in the flue gas from the furnace. The induced draft fans work in a harsh flue gas environment with high temperature, high ash content and high pollution for a long time, which can easily cause the fan casing to deform due to high temperature and the motor to burn out. Summary of the Invention

[0004] In view of this, the present invention provides a smoke exhaust device and a biomass boiler device to solve the problem in the prior art that the induced draft fan of the biomass boiler is easily burned, resulting in safety accidents.

[0005] In order to solve the above technical problems, the technical solutions of the present invention are as follows:

[0006] In the first aspect, the present invention provides a smoke exhaust device, comprising: a connecting body, an induced draft assembly and a smoke exhaust pipe; the connecting body is connected to the exhaust pipe of the furnace body, and a mixing chamber is provided in the connecting body; the induced draft assembly is provided on the connecting body and is connected to the mixing chamber; one end of the smoke exhaust pipe is connected to the mixing chamber, and the induced draft assembly is suitable for introducing high-speed jet air into the mixing chamber to discharge the smoke entering the mixing chamber from the exhaust pipe from the smoke exhaust pipe.

[0007] The advantages of this system are as follows: by arranging the induced draft assembly and the exhaust pipe on the connecting body, when the induced draft assembly is activated, a high-speed jet of air is introduced into the mixing chamber, which then flows out of the exhaust pipe, creating a negative pressure in the mixing chamber, allowing smoke to enter the mixing chamber through the exhaust pipe. This exhaust device prevents high-temperature smoke from the furnace from entering the induced draft assembly, thereby improving construction reliability, ensuring the normal operation of the induced draft assembly, and enhancing safety.

[0008] According to some embodiments of the present invention, the induced draft assembly includes an induced draft fan and a jet nozzle, one end of the jet nozzle is connected to the induced draft fan, a first port is provided on one side of the connecting body, and the other end of the jet nozzle is passed through the first port to extend into the mixing chamber.

[0009] According to some embodiments of the present invention, a second port is provided on the upper end surface of the connecting body, the second port is connected to the exhaust pipe, and one end of the jet nozzle located in the mixing chamber extends to the vertical projection of the second port.

[0010] According to some embodiments of the present invention, the cross section of the jet nozzle converges along the induced wind flow direction.

[0011] According to some embodiments of the present invention, the smoke exhaust pipe includes a convergent portion, a horizontal throat portion and a diffuser portion connected in sequence along the direction of smoke flow, one end of the convergent portion is connected to the mixing chamber, the cross-section of the convergent portion converges along the direction of smoke flow, the cross-section of the horizontal throat remains consistent along the direction of smoke flow, and the cross-section of the diffuser portion expands along the direction of smoke flow.

[0012] According to some embodiments of the present invention, the smoke exhaust pipe and the jet nozzle are located on the same horizontal axis.

[0013] According to some embodiments of the present invention, a diameter of an end of the convergent portion connected to the connection body is larger than a diameter of the first port.

[0014] According to some embodiments of the present invention, the smoke exhaust device further includes a dust cleaning device, which is detachably disposed at the bottom of the connecting body and communicates with the mixing chamber, and is suitable for storing accumulated dust.

[0015] In a second aspect, the present invention further provides a biomass boiler device, comprising: a furnace body, wherein the furnace body is provided with an exhaust pipe; and the smoke exhaust device is connected to the exhaust pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of a smoke exhaust device provided in an embodiment of the present invention.

[0018] Description of reference numerals:

[0019] 1. Connecting body; 11. First port; 12. Second port; 13. Mixing chamber; 2. Induced draft assembly; 21. Induced draft fan; 22. Jet nozzle; 3. Smoke exhaust pipe; 31. Converging portion; 32. Horizontal throat; 33. Diffuser. DETAILED DESCRIPTION

[0020] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0023] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] Reference Figure 1 As shown in the figure, the induced air flow direction is along the direction indicated by the arrow of the line segment in the figure.

[0025] Reference Figure 1 As shown, in the first aspect, the present invention provides a smoke exhaust device, comprising: a connecting body 1, an induced draft component 2 and a smoke exhaust pipe 3; the connecting body 1 is connected to the exhaust pipe of the furnace body, and a mixing chamber 13 is provided in the connecting body 1; the induced draft component 2 is provided on the connecting body 1 and is connected to the mixing chamber 13; one end of the smoke exhaust pipe 3 is connected to the mixing chamber 13, and the induced draft component 2 is suitable for introducing high-speed jet air into the mixing chamber 13 to discharge the smoke entering the mixing chamber 13 from the exhaust pipe from the smoke exhaust pipe 3.

[0026] Specifically, by arranging the induced draft assembly 2 and the smoke exhaust pipe 3 on the connecting body 1, when the induced draft assembly 2 is activated, a high-speed jet of air is introduced into the mixing chamber 13, and the high-speed jet of air flows out of the smoke exhaust pipe 3, thereby forming a negative pressure in the mixing chamber 13, so that the smoke enters the mixing chamber 13 through the exhaust pipe. This smoke exhaust device prevents the high-temperature smoke from the furnace body from entering the induced draft assembly 2, thereby improving construction reliability, ensuring the normal operation of the induced draft assembly 2, and enhancing safety.

[0027] It can be understood that the high-speed jet air and the high-temperature flue gas are mixed in the mixing chamber 13 to form a swirl, which reduces the temperature of the flue gas and prevents the temperature of the flue gas discharged from the exhaust pipe 3 from being too high.

[0028] In some embodiments of the present invention, the induced draft assembly 2 includes an induced draft fan 21 and a jet nozzle 22, one end of the jet nozzle 22 is connected to the induced draft fan 21, a first port 11 is provided on one side of the connecting body 1, and the other end of the jet nozzle 22 is passed through the first port 11 to extend into the mixing chamber 13.

[0029] Specifically, the induced draft fan 21 is connected to the connecting body 1 through a jet nozzle 22. One end of the jet nozzle 22 is connected to the air outlet of the induced draft fan 21, and the other end of the jet nozzle 22 extends into the mixing chamber 13. Through the arrangement of the jet nozzle 22, on the one hand, the speed of the induced air can be increased, and on the other hand, the spacing between the induced draft fan 21 and the connecting body 1 is achieved to prevent high-temperature flue gas from flowing back into the induced draft fan 21, causing the induced draft fan 21 to be heated and burned.

[0030] It is understandable that the jet nozzle 22 is detachably connected to the induced draft fan 21 . When the jet nozzle 22 is deformed by heat, the jet nozzle 22 can be replaced, thereby improving maintenance efficiency and reducing maintenance costs.

[0031] In some embodiments of the present invention, a second port 12 is provided on the upper end surface of the connecting body 1 , the second port 12 is connected to the exhaust pipe, and one end of the jet nozzle 22 located in the mixing chamber 13 extends to the vertical projection of the second port 12 .

[0032] Specifically, one end of the jet nozzle 22 is located in the mixing chamber 13 and extends to the vertical projection of the second port 12, so that the high-speed jet air is first discharged through the smoke exhaust pipe 3, thereby forming a negative pressure in the mixing chamber 13 to attract high-temperature smoke into the mixing chamber 13, thereby improving the exhaust efficiency and preventing high-temperature smoke from flowing back from the exhaust pipe.

[0033] In some embodiments of the present invention, the cross section of the jet nozzle 22 converges along the induced air flow direction.

[0034] Specifically, the cross section of the jet nozzle 22 converges along the induced air flow direction, thereby increasing the velocity of the air flowing through the jet nozzle 22 to improve the induced air efficiency, forming a negative pressure in the mixing chamber 13, and improving the smoke exhaust efficiency.

[0035] In some embodiments of the present invention, the smoke exhaust pipe 3 includes a convergent portion 31, a horizontal throat 32 and a diffuser 33 connected in sequence along the direction of smoke flow. One end of the convergent portion 31 is connected to the mixing chamber 13. The cross-section of the convergent portion 31 converges along the direction of smoke flow, the cross-section of the horizontal throat 32 remains consistent along the direction of smoke flow, and the cross-section of the diffuser 33 expands along the direction of smoke flow.

[0036] Specifically, the mixing chamber 13 increases the flow rate in the convergent section, maintains the flow rate in the horizontal throat 32, and reduces the flow rate in the diffuser 33 to improve the exhaust efficiency of the flue gas and prevent the exhaust temperature of the flue gas from being too high.

[0037] In some embodiments of the present invention, the smoke exhaust pipe 3 and the jet nozzle 22 are located on the same horizontal axis.

[0038] In some embodiments of the present invention, the diameter of the end of the convergent portion 31 connected to the connection body 1 is larger than the diameter of the first port 11 .

[0039] Specifically, the smoke exhaust pipe 3 and the jet nozzle 22 are located on the same horizontal axis, and the two ports are opposite to each other, so that after the high-speed jet air flows out of the jet nozzle 22, it drives the smoke into the smoke exhaust pipe 3, so that the mixing chamber 13 always maintains a negative pressure environment to ensure the normal operation of the smoke.

[0040] In some embodiments of the present invention, the smoke exhaust device further includes a dust cleaning device, which is detachably disposed at the bottom of the connecting body 1 and communicates with the mixing chamber 13 , and is suitable for storing accumulated dust.

[0041] Specifically, after the high-temperature flue gas enters the mixing chamber 13, it is mixed with the high-speed jet air. The high-temperature flue gas will bring out dust. After the high-temperature flue gas is mixed with the high-speed jet air, a vortex is formed. After hitting the side wall of the connecting body 1, the dust is deposited. A cleaning device is set at the bottom of the connecting body 1. The cleaning device is a pull-out structure. After the dust falls into the cleaning device, it is pulled out to avoid the dust from being deposited in the connecting body 1, affecting the smoke exhaust efficiency and polluting the environment.

[0042] In a second aspect, the present invention further provides a biomass boiler device, comprising:

[0043] The furnace body is provided with an exhaust pipe; the smoke exhaust device is connected to the exhaust pipe.

[0044] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A smoke exhaust device, characterized in that: include: A connecting body (1) is connected to an exhaust pipe of the furnace body, and a mixing chamber (13) is provided in the connecting body (1); An air induction component (2) is disposed on the connecting body (1) and is in communication with the mixing chamber (13); A smoke exhaust pipe (3), one end of which is connected to the mixing chamber (13), and the air induction component (2) is suitable for introducing high-speed jet air into the mixing chamber (13) so as to discharge the smoke entering the mixing chamber (13) from the exhaust pipe from the smoke exhaust pipe.

2. The smoke exhaust device according to claim 1, characterized in that: The induced draft component (2) comprises an induced draft fan (21) and a jet nozzle (22); one end of the jet nozzle (22) is connected to the induced draft fan (21); a first port (11) is provided on one side of the connecting body (1); the other end of the jet nozzle (22) is passed through the first port (11) to extend into the mixing chamber (13).

3. The smoke exhaust device according to claim 2, characterized in that: The upper end surface of the connecting body (1) is provided with a second port (12), the second port (12) is connected to the exhaust pipe, and one end of the jet nozzle (22) located in the mixing chamber (13) extends to the projection of the second port (12) in the vertical direction.

4. The smoke exhaust device according to claim 2, characterized in that: The cross section of the jet nozzle (22) converges along the wind-induced flow direction.

5. The smoke exhaust device according to claim 2, characterized in that: The smoke exhaust pipe (3) comprises a convergent portion (31), a horizontal throat portion (32) and a diffuser portion (33) which are sequentially connected along the direction of smoke flow; one end of the convergent portion (31) is connected to the mixing chamber (13); the cross section of the convergent portion (31) converges along the direction of smoke flow; the cross section of the horizontal throat portion (32) remains consistent along the direction of smoke flow; and the cross section of the diffuser portion (33) expands along the direction of smoke flow.

6. The smoke exhaust device according to claim 5, characterized in that: The smoke exhaust pipe (3) and the jet nozzle (22) are located on the same horizontal axis.

7. The smoke exhaust device according to claim 6, characterized in that: The diameter of one end of the convergent portion (31) connected to the connection body (1) is greater than the diameter of the first port (11).

8. The smoke exhaust device according to any one of claims 1 to 7, characterized in that: It also comprises a dust cleaning device, which is detachably arranged at the bottom of the connecting body (1) and is connected to the mixing chamber (13), and is suitable for storing accumulated dust.

9. A biomass boiler equipment, characterized in that: include: A furnace body, wherein the furnace body is provided with an exhaust pipe; The smoke exhaust device according to any one of claims 1 to 8, wherein the smoke exhaust device is connected to the exhaust pipe.

Images