Fan silencing and filtering device for water-cooling premixing gas furnace

Abstract

The fan silencing and filtering device comprises a fan, a silencer, a flexible connector, a round-top and square-bottom round side and a filter screen which are sequentially connected, the round-top and square-bottom round side is connected with the silencer through the flexible connector, a clamping groove structure is arranged on the round-top and square-bottom square side, the filter screen is provided with two layers, and the two layers of the filter screen are connected through the flexible connector. And the clamping grooves are all detachably mounted in the clamping grooves. In order to prevent large-particle impurities from entering a water-cooling premixing gas furnace to cause the conditions of non-uniform mixing and blockage of a combustion surface of a hearth, according to the novel fan silencing and filtering device, a filter screen adopts an internal and external coarse and fine filter screen module, so that air entering a combustor fan is cleaner, gas and air are mixed more sufficiently and uniformly, the failure rate of the hearth is reduced, energy is saved, emission is reduced, and the service life of the combustor is prolonged. The filter screen adopts a directly detachable form, can be regularly pulled out for cleaning, is simple and convenient, and improves the problems that the combustion surface of the premixed surface is easy to block and the mixing is uneven.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler equipment, in particular to a fan silencing and filtering device for a water-cooled premixed gas furnace. Background Art

[0002] The premixing cylinder and the furnace combustion surface of a water-cooled premixed gas furnace are one of the key components of the water-cooled premixed gas furnace. Its main function is to completely and evenly mix gas and air in the premixing cylinder, and a lower air content can enable the fuel to burn completely, and then enter the furnace combustion surface for combustion. Due to the fast combustion speed, uniform combustion, short and transparent flame, and no obvious contour, it is also called flameless combustion. The air sucked in by the fan is pre-mixed with the gas in the premixing cylinder and then burned, which improves the combustion efficiency and achieves the effect of energy conservation and environmental protection.

[0003] The water-cooled premixed gas furnace has relatively high requirements for the cleanliness of air. Conventional fans are only equipped with silencers and simple wire large-mesh filters. Flying flocs and large-particle sundries can easily enter the premixing cylinder and the furnace combustion surface through the fan, resulting in uneven mixing of fuel and air and local blockage of the furnace combustion surface orifice plate, leading to uneven combustion, reduced burnout rate, and increased gas consumption.

[0004] Currently, each boiler factory is exploring higher combustion efficiency and lower NO X emissions. Only by taking a suitable ratio of air and gas, fully mixing them and burning them completely can higher combustion efficiency and better initial emission data be obtained. Summary of the Utility Model

[0005] In view of the above technical deficiencies, to prevent large-particle sundries from entering the water-cooled premixed gas furnace and causing uneven mixing and blockage of the furnace combustion surface, the purpose of the utility model is to provide a fan silencing and filtering device for a water-cooled premixed gas furnace. The filter screen adopts internal and external coarse and fine filter screen modules to filter out large-particle sundries respectively. The filter screen adopts a directly detachable form and can be periodically pulled out for cleaning, which is simple and convenient, and completely improves the problems of easy blockage and uneven mixing on the premixed surface combustion surface.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A fan silencing and filtering device for a water-cooled premixed gas furnace, comprising a fan, a silencer, a flexible connection, a square-to-round transition piece, and a filter screen connected in sequence. The circular side of the square-to-round transition piece is connected to the silencer through the flexible connection, and the filter screen is installed on the square side of the square-to-round transition piece.

[0008] Further, the square side of the square-to-round transition piece is provided with a slot structure, and the filter screen is detachably installed in the slot.

[0009] Further, the filter screen is a double-layer filter screen, and both the double-layer filter screens are detachably installed in the card slots.

[0010] Further, the filter screen includes an outer gas-liquid screen and an inner stainless steel fine screen, and both the outer gas-liquid screen and the inner stainless steel fine screen are detachably installed in the card slots.

[0011] Further, a handle is provided on one side of the filter screen for convenient extraction.

[0012] Further, the flexible connection is a canvas flexible connection.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. The filter screen adopts inner and outer thick and fine filter screen modules, which can prevent large-particle sundries from entering the water-cooled premixed gas furnace, avoiding the conditions of uneven mixing and blocking the combustion surface of the furnace, making the air entering the burner fan cleaner and the mixing of gas and air more sufficient and uniform;

[0015] 2. The through-pass capacity of the combustion hole plate in the furnace increases, and the failure rate decreases;

[0016] 3. The burnout rate of the gas increases, and the initial emissions such as NO X are reduced, playing a role in energy conservation and consumption reduction;

[0017] 4. The filter screen adopts a directly detachable form, and can be regularly taken out for cleaning, which is simple and convenient, and completely improves the problems of easy blockage and uneven mixing on the premixed surface combustion surface. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is the front view of Embodiment 1 of the present utility model;

[0020] Figure 2 It is the top view of Embodiment 1 of the present utility model;

[0021] Figure 3 It is the schematic structural diagram of the filter screen of Embodiment 1 of the present utility model;

[0022] Explanation of the Reference Numerals in the Drawings:

[0023] 1. Fan; 2. Silencer; 3. Flexible connection; 4. Square-to-round transition; 5. Filter screen. Detailed Embodiments

[0024] Next, in combination with the accompanying drawings in the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0025] As Figures 1 to 2 shown, a fan silencing and filtering device for a water-cooled premixed gas furnace includes a fan 1, a silencer 2, a flexible connection 3, a round-to-square transition piece 4, and a filter screen 5 that are connected in sequence. The flexible connection 3 is a canvas flexible connection. The round-to-square transition piece 4 is also called a square-round reducer. The circular side of the round-to-square transition piece 4 is connected to the silencer 2 through the flexible connection 3. The square side of the round-to-square transition piece 4 is provided with a double-layer card slot structure, and the filter screen 5 is detachably installed in the card slot and can be periodically pulled out for cleaning, which is simple and convenient.

[0026] As Figure 3 shown, the filter screen 5 adopts two inner and outer filter screen plates that can be pulled out for cleaning, including an outer gas-liquid mesh and an inner stainless steel fine mesh. A handle is provided on one side of the filter screen 5, which is convenient for pulling out and periodically cleaning, solving the problems of easy blockage and uneven mixing on the premixed surface combustion surface. This structural form does not increase the difficulty in the design, manufacturing, and installation processes, but this structure can achieve better beneficial effects during operation.

[0027] When the present utility model is installed on-site, the silencer 2 is fixed to the shell of the fan 1, the flexible connection 3 is respectively connected to the silencer 2 and the round-to-square transition piece 4, and the filter screen 5 is fixed in the card slot of the round-to-square transition piece 4, which is convenient for disassembly, assembly, and pulling out for periodic cleaning.

[0028] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model also intends to include these changes and modifications.

Claims

1. A fan sound insulation and filtration device for a water-cooled premixed gas furnace, characterized in that, It includes a fan (1), a silencer (2), a flexible connection (3), a square-to-round transition piece (4) and a filter screen (5) connected in sequence. The round side of the square-to-round transition piece (4) is connected to the silencer (2) through the flexible connection (3), and the filter screen (5) is installed on the square side of the square-to-round transition piece (4).

2. The blower silencing and filtering device for a water-cooled premixed gas furnace according to claim 1, characterized in that, The square side of the square-to-round transition piece (4) is provided with a clamping groove structure, and the filter screen (5) is detachably installed in the clamping groove.

3. The blower silencing and filtering device for a water-cooled premixed gas furnace according to claim 2, wherein The filter screen (5) is a double-layer filter screen, and both the double-layer filter screens are detachably installed in the clamping groove.

4. The blower silencing and filtering device for a water-cooled premixed gas furnace according to claim 3, wherein, The filter screen includes an outer gas-liquid mesh and an inner stainless steel fine mesh, and both the outer gas-liquid mesh and the inner stainless steel fine mesh are detachably installed in the clamping groove.

5. The blower silencing and filtering device for a water-cooled premixed gas furnace according to any one of claims 2 to 4, characterized in that, One side of the filter screen (5) is provided with a handle for convenient extraction.

6. The blower silencing and filtering device for a water-cooled premixed gas furnace according to claim 1, wherein, The flexible connection (3) is a canvas flexible connection.

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