Double-filter air inlet system for boiler

Abstract

The utility model discloses a double-filter air inlet system for a boiler, and relates to the technical field of boiler air inlet systems, the double-filter air inlet system for the boiler comprises a fan, and further comprises a venturi tube arranged at an air inlet of the fan so as to enable air to enter the fan through the venturi tube; the double-layer filter is mounted at one end, far away from the fan, of the Venturi tube, and the double-layer filter comprises a diamond net filter layer and a polyester fiber non-woven fabric filter layer which can sequentially filter air. Due to the arrangement of the diamond net filter layer and the polyester fiber non-woven fabric filter layer, air entering the combustion chamber can firstly penetrate through the diamond net filter layer to be filtered for the first time and then is filtered for the second time through the polyester fiber non-woven fabric filter layer, fine particles and moisture in the air are filtered out, and the air quality is improved. The cleanliness of air entering the combustion chamber is guaranteed, the combustor can obtain clean air more easily, combustion is more stable, and the whole hearth is cleaner.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler air intake systems, in particular to a double-filter air intake system for a boiler. Background Art

[0002] The combustion chamber of the boiler needs to be equipped with an air intake system to introduce gas and air, but there are many impurities in the air, so it needs to be equipped with corresponding filters. The current filtration on the market is only single-layer filtration, and the filtration effect is poor, resulting in low air cleanliness, unstable combustion, and more residues in the furnace after combustion. Utility Model Content

[0003] The utility model provides a double-filter air intake system for a boiler, which has the advantage of good filtering effect and solves the problem of poor filtering effect of a single-layer filter in the prior art.

[0004] In order to achieve a good filtering effect, the utility model provides the following technical solutions: a double-filter air intake system for a boiler, comprising a fan, and also comprising: a venturi tube, wherein the venturi tube is installed at the air inlet of the fan so that air can enter the fan through the venturi tube; a double-layer filter, wherein the double-layer filter is installed at one end of the venturi tube away from the fan, and the double-layer filter comprises a diamond mesh filter layer and a polyester fiber non-woven fabric filter layer that can filter the air in sequence; a gas intake pipe, wherein one end of the gas intake pipe is fixed to the narrow diameter of the venturi tube, and the other end of the gas intake pipe is connected to the gas supply pipe, and the narrow diameter of the venturi tube is formed with a negative pressure by the flowing air, so that the narrow diameter has suction on the gas in the gas intake pipe.

[0005] As a preferred technical solution of the utility model, a solenoid valve is installed on the gas intake pipe, and the solenoid valve is used to control the opening and closing of the gas intake pipe.

[0006] As a preferred technical solution of the utility model, the double-layer filter also includes a shell, and the diamond mesh filter layer and the polyester fiber non-woven fabric filter layer are integrated in the shell.

[0007] As a preferred technical solution of the utility model, an opening is provided on a side of the shell close to the venturi tube, and the opening is fixedly connected to one end of the venturi tube via a flange.

[0008] As a preferred technical solution of the utility model, the diamond mesh filter layer and the polyester fiber non-woven fabric filter layer are inserted into the outer shell; a rotating buckle is rotatably installed at one side edge of the outer shell close to the air inlet side, and when the rotating buckle overlaps the diamond mesh filter layer, it is used to limit the diamond mesh filter layer from detaching from the outer shell.

[0009] As a preferred technical solution of the utility model, the fan has an exhaust port, and the exhaust port is used to exhaust air and fuel gas into the combustion chamber.

[0010] Compared with the prior art, the utility model provides a dual-filter air intake system for a boiler, which has the following beneficial effects:

[0011] 1. The boiler uses a double-filter air intake system, which is equipped with a diamond mesh filter layer and a polyester fiber non-woven filter layer, so that the air entering the combustion chamber can first pass through the diamond mesh filter layer for the first filtration to filter out large particles of impurities, and then pass through the polyester fiber non-woven filter layer for a second filtration to filter out fine particles and moisture in the air. The corresponding impurities can be adhered to the filter layer, achieving the effect of air filtration, ensuring the cleanliness of the air entering the combustion chamber, and being more conducive to the burner obtaining clean air, making the combustion more stable and the entire furnace cleaner.

[0012] 2. The boiler uses a dual-filter air intake system, which is provided with a rotating buckle. When the rotating buckle overlaps the diamond mesh filter layer, it is used to limit the diamond mesh filter layer from detaching from the outer shell. When the rotating buckle is rotated to a position away from the diamond mesh filter layer, the diamond mesh filter layer and the polyester fiber non-woven fabric filter layer can be easily taken out of the outer shell for cleaning.

[0013] 3. The boiler uses a double-filter air intake system and is equipped with a Venturi tube, so that when the air sucked in by the above-mentioned fan passes through the Venturi tube, negative pressure can be formed at its narrow diameter. This negative pressure can make the narrow diameter have suction force on the gas in the gas intake pipe, so that the gas is sucked into the interior of the Venturi tube and enters the fan for premixing synchronously with the air.

[0014] 4. The boiler uses a double-filter air intake system, and the shell of the double-layer filter is directly fixed on the Venturi air intake surface by hanging, which is easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a main perspective view of the present utility model;

[0016] Figure 2 This is a second viewing angle diagram of the present utility model;

[0017] Figure 3 It is an exploded view of the utility model;

[0018] Figure 4 This is a connection diagram of the venturi tube and the gas inlet pipe of the utility model;

[0019] Figure 5 For this utility model Figure 1 A magnified image of area A;

[0020] Figure 6 This is an overall diagram of the double-layer filter of the utility model.

[0021] In the figure: 1. fan; 2. solenoid valve; 3. double-layer filter; 31. outer shell; 32. diamond mesh filter layer; 33. polyester fiber non-woven filter layer; 34. rotating buckle; 4. venturi tube; 5. gas inlet pipe; 6. exhaust port. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Below through Figure 1 - Figure 6 The utility model is described in detail with respect to a double-filter air intake system for a boiler provided in an embodiment of the utility model.

[0024] The utility model discloses a double-filter air intake system for a boiler, comprising a fan 1 and a venturi tube 4 installed at the air inlet of the fan 1. When the fan 1 is working, it can inhale air from the outside, and the air enters the fan 1 through the venturi tube 4. In order to prevent impurities in the air from affecting the flame combustion in the combustion chamber of the boiler, a double-layer filter 3 is provided here. The double-layer filter 3 is installed at one end of the venturi tube 4 away from the fan 1. The double-layer filter 3 comprises a diamond mesh filter layer 32 and a polyester fiber non-woven fabric filter layer 33 which can filter the air in sequence. That is, when the fan 1 is working, the outside air can first pass through the diamond mesh filter layer 32 to be filtered for the first time to filter out large particles of impurities, and then pass through the polyester fiber non-woven fabric filter layer 33 for secondary filtration to filter out fine particles and moisture in the air. The corresponding impurities can be adhered to the filter layer, so as to achieve the effect of air filtration, ensure the cleanliness of the air entering the combustion chamber, and thus ensure the thoroughness of the gas combustion.

[0025] The diamond mesh filter layer 32 can be washed and reused; the polyester fiber non-woven filter layer 33 cannot be washed and can be dusted with an air gun.

[0026] In addition, both the diamond mesh filter layer 32 and the polyester fiber non-woven filter layer 33 have an outer frame, and the outer frame is preferably made of an aluminum frame, which is strong and durable.

[0027] One end of the gas inlet pipe 5 is fixed to the narrow diameter of the venturi tube 4, and the other end of the gas inlet pipe 5 is connected to the gas supply pipe, so that when the air sucked by the above-mentioned fan 1 passes through the venturi tube 4, negative pressure can be formed at its own narrow diameter. This negative pressure can make the narrow diameter have suction force on the gas in the gas inlet pipe 5, so that the gas is sucked into the inside of the venturi tube 4 and enters the fan 1 for premixing synchronously with the air.

[0028] In addition, the fan 1 has an exhaust port 6, which is used to exhaust air and fuel gas into the combustion chamber, so that there is enough air and fuel gas in the combustion chamber for combustion.

[0029] A solenoid valve 2 is installed on the gas inlet pipe 5. The solenoid valve 2 is used to control the opening and closing of the gas inlet pipe 5. When air enters the fan 1, the solenoid valve 2 is in an open state. When the fan 1 is not working, the solenoid valve 2 is in a closed state to prevent gas from entering.

[0030] The double-layer filter 3 further comprises a housing 31 , in which a diamond mesh filter layer 32 and a polyester fiber non-woven filter layer 33 are integrated. The housing 31 is used to protect the two filter layers on one hand, and is used to connect with the venturi tube 4 on the other hand.

[0031] In order to facilitate the connection between the shell 31 and the venturi tube 4, an opening is provided on one side of the shell 31 close to the venturi tube 4, and the opening is fixedly connected to one end of the venturi tube 4 through a flange. Bolt holes need to be provided around the opening so that bolts can be inserted into the flange and the bolt holes to fix the venturi tube 4 and the shell 31.

[0032] Preferably, the diamond mesh filter layer 32 and the polyester fiber non-woven filter layer 33 are inserted into the outer shell 31 to facilitate the disassembly of the diamond mesh filter layer 32 and the polyester fiber non-woven filter layer 33. In order to further ensure the stable position of the diamond mesh filter layer 32 and the polyester fiber non-woven filter layer 33, a rotating buckle 34 is rotatably installed at the edge of one side of the outer shell 31 close to the air inlet side. When the rotating buckle 34 overlaps the diamond mesh filter layer 32, it is used to limit the diamond mesh filter layer 32 from detaching from the outer shell 31. When the rotating buckle 34 is rotated to a position away from the diamond mesh filter layer 32, the diamond mesh filter layer 32 and the polyester fiber non-woven filter layer 33 can be easily taken out of the outer shell 31.

[0033] The working principle and use process of the utility model are as follows: when in use, the fan 1 works to suck the external gas into the double-layer filter 3. The external air can first pass through the diamond mesh filter layer 32 for the first filtration, and then pass through the polyester fiber non-woven filter layer 33 for the second filtration, and the filtering effect is good. When the air after filtering passes through the venturi tube 4, a negative pressure can be formed at the narrow diameter of the venturi tube 4. This negative pressure can make the narrow diameter have suction force on the gas in the gas inlet pipe 5, so that the gas is sucked into the inside of the venturi tube 4, and enters the fan 1 for premixing synchronously with the air, and then is discharged to the inside of the combustion chamber through the exhaust port 6.

[0034] In summary, the boiler uses a double-filter air intake system. Since the diamond mesh filter layer 32 and the polyester fiber non-woven filter layer 33 are provided, the air entering the combustion chamber can first pass through the diamond mesh filter layer 32 for the first filtration, and then pass through the polyester fiber non-woven filter layer 33 for the second filtration, the filtration effect is good, there is no impurity in the combustion chamber, and the combustion is more thorough. A rotating buckle 34 is provided. The rotating buckle 34 is rotatably installed at the edge of one side of the shell 31 close to the air intake side. When the rotating buckle 34 overlaps the diamond mesh filter layer 32, it is used to The diamond mesh filter layer 32 is restricted from detaching from the outer shell 31. When the rotating buckle 34 is rotated to a position away from the diamond mesh filter layer 32, the diamond mesh filter layer 32 and the polyester fiber non-woven fabric filter layer 33 can be easily taken out from the outer shell 31; a venturi tube 4 is provided, so that when the air sucked in by the above-mentioned fan 1 passes through the venturi tube 4, a negative pressure can be formed at its narrow diameter. This negative pressure can make the narrow diameter have suction force on the gas in the gas inlet pipe 5, so that the gas is sucked into the inside of the venturi tube 4 and enters the fan 1 for premixing synchronously with the air.

[0035] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dual-filter air intake system for a boiler, comprising a fan (1), characterized in that: Also includes: A venturi tube (4), wherein the venturi tube (4) is installed at the air inlet of the fan (1) so that air can enter the fan (1) through the venturi tube (4); A double-layer filter (3), the double-layer filter (3) being installed at one end of the venturi tube (4) away from the fan (1), the double-layer filter (3) comprising a diamond mesh filter layer (32) and a polyester fiber non-woven filter layer (33) capable of filtering air in sequence; A gas intake pipe (5), one end of which is fixed to the narrow diameter of the venturi tube (4), and the other end of which is connected to the gas supply pipe. The narrow diameter of the venturi tube (4) is subjected to negative pressure by the flowing air, so that the narrow diameter has a suction force on the gas in the gas intake pipe (5).

2. A dual-filter air intake system for a boiler according to claim 1, characterized in that: The gas intake pipe (5) is provided with a solenoid valve (2), and the solenoid valve (2) is used to control the opening and closing of the gas intake pipe (5).

3. A dual-filter air intake system for a boiler according to claim 1, characterized in that: The double-layer filter (3) further comprises a housing (31), and the diamond mesh filter layer (32) and the polyester fiber non-woven fabric filter layer (33) are integrated in the housing (31).

4. A dual-filter air intake system for a boiler according to claim 3, characterized in that: An opening is provided on one side of the housing (31) close to the venturi tube (4), and the opening is fixedly connected to one end of the venturi tube (4) via a flange.

5. A dual-filter air intake system for a boiler according to claim 3, characterized in that: The diamond mesh filter layer (32) and the polyester fiber non-woven filter layer (33) are inserted into the housing (31); A rotating buckle (34) is rotatably mounted on one side edge of the housing (31) close to the air inlet side, and when the rotating buckle (34) overlaps the diamond mesh filter layer (32), it is used to restrict the diamond mesh filter layer (32) from being separated from the housing (31).

6. A dual-filter air intake system for a boiler according to claim 1, characterized in that: The fan (1) has an exhaust port (6), and the exhaust port (6) is used to exhaust air and fuel gas into the combustion chamber.

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