Multi-blade centrifugal fan with waste gas after-treatment function

Abstract

The utility model belongs to the technical field of centrifugal fans, and particularly relates to a multi-blade centrifugal fan with waste gas after-treatment, which comprises a volute and a flow mixing pipe mounted at an air outlet of the volute, a catalytic device shell is fixed at the top end of the flow mixing pipe, a primary adsorption layer is fixed at one end, close to the flow mixing pipe, in the catalytic device shell, and a secondary adsorption layer is fixed at the other end of the catalytic device shell. An adsorption catalytic layer is fixed at one end, far away from the flow mixing pipe, in the catalytic device shell; according to the catalytic device, air enters the volute from the air inlets in the two sides, one air inlet is connected with the connecting pipe, so that waste gas is sucked into one side of the volute, air is sucked into the other side of the volute, the air and the waste gas are mixed in the volute, are fully mixed when passing through the flow mixing pipe and enter the catalytic device shell, and the primary adsorption layer adsorbs the waste gas preliminarily; the adsorption catalyst layer further adsorbs and catalyzes the waste gas, and air and the waste gas are mixed, so that the concentration of the waste gas can be diluted, the waste gas can be conveniently adsorbed and catalyzed, and the treatment efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of centrifugal fans, and in particular relates to a multi-blade centrifugal fan with exhaust gas post-processing function. Background Art

[0002] A centrifugal fan is a fluid machine that relies on input mechanical energy to increase gas pressure and discharge the gas. Its working principle is to use a high-speed rotating impeller to accelerate the gas, thereby treating the gas as an incompressible fluid and discharging it. In the exhaust gas treatment system, centrifugal fans are usually used in conjunction with other equipment, such as dust collectors and adsorption towers, to achieve the purpose of exhaust gas purification.

[0003] According to the announcement number: CN213270337U, a centrifugal fan for an exhaust gas treatment device is disclosed. This technology discloses "including a main body, an air outlet is provided on the upper surface of the main body, a connecting plate is installed above the air outlet, a filter plate is fixedly installed on the inner side of the connecting plate, a through hole is provided on the inner side of the filter plate, and an activated carbon adsorption net is provided on the inner side of the through hole". The technical effects include "increasing the working efficiency of the centrifugal fan and prolonging the service life of the centrifugal fan".

[0004] However, the existing centrifugal fans have low catalytic and adsorption efficiency when treating exhaust gas, especially for exhaust gas with high concentration, which needs to be purged and diluted before adsorption and catalytic treatment can be performed.

[0005] In order to solve the above problems, this application proposes a multi-blade centrifugal fan with exhaust gas post-treatment. Utility Model Content

[0006] In order to solve the problems raised in the above background technology, the utility model provides a multi-blade centrifugal fan with exhaust gas post-treatment, which can mix air and exhaust gas in equal proportions, dilute the concentration of exhaust gas, and improve the adsorption and catalytic efficiency of the adsorption catalytic layer.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a multi-blade centrifugal fan with exhaust gas after-treatment, comprising a volute and a mixing pipe installed at the air outlet of the volute, a catalytic device shell being fixed to the top of the mixing pipe, a primary adsorption layer being fixed at one end of the catalytic device shell close to the mixing pipe, an adsorption catalytic layer being fixed at one end of the catalytic device shell away from the mixing pipe, symmetrical air inlets being provided on both sides of the volute, a fixing bracket fixed to the volute at the air inlet, an outer rotor motor being fixed between the two fixing brackets, an impeller being installed on the outer rotor of the outer rotor motor, and one of the air inlets being connected to the exhaust gas pipe via a connecting pipe.

[0008] As a preferred multi-blade centrifugal fan with exhaust gas post-treatment function of the present invention, a guide plate is fixed on the inner side of the mixing tube, and the guide plate is a spiral auger structure.

[0009] As a preferred multi-blade centrifugal fan with exhaust gas after-treatment of the utility model, a base is provided at the bottom of the volute, and a mounting groove with a concave structure is provided on the surface of the base. A damping gasket is fixed in the mounting groove, and the surface of the damping gasket matches the volute, and the volute is installed on the damping gasket.

[0010] As a preferred multi-blade centrifugal fan with exhaust gas after-treatment of the utility model, clamps are fixed on both sides of the damping gasket, the damping gasket and the clamps cover the outer wall of the volute, and the connected ends of the two clamps are fixed by screws.

[0011] As a preferred embodiment of the multi-blade centrifugal fan with exhaust gas after-treatment of the present invention, the fixing bracket is a Y-shaped plate structure, and the center of the fixing bracket is fixedly connected to the inner stator of the outer rotor motor.

[0012] As a preferred embodiment of the multi-blade centrifugal fan with exhaust gas after-treatment function of the present invention, the ratio of the inner diameter of the mixing tube to the inner diameter of the catalytic device housing is 1:1.5.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] When the outer rotor motor 5 of the present invention rotates, air enters the volute 1 from the air inlets 7 on both sides. Since one of the air inlets 7 is connected to the connecting pipe 71 and the other is exposed, exhaust gas is inhaled on one side of the volute 1 and air is inhaled on the other side. The air and exhaust gas are mixed in the volute 1, and are fully mixed when passing through the mixing pipe 2. They enter the catalytic device housing 3, and the primary adsorption layer 31 preliminarily adsorbs the exhaust gas. The adsorption catalytic layer 32 further adsorbs and catalytically treats the exhaust gas to decompose and purify the exhaust gas. Since the air and exhaust gas are mixed, the concentration of the exhaust gas can be diluted, which facilitates the adsorption and catalysis of the exhaust gas and improves the treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0018] Figure 3This is a left-side structural schematic diagram of the present utility model;

[0019] In the figure: 1. volute; 2. mixing pipe; 21. guide plate; 3. catalytic device housing; 31. primary adsorption layer; 32. adsorption catalytic layer; 4. fixing bracket; 5. outer rotor motor; 6. impeller; 7. air inlet; 71. connecting pipe; 8. base; 9. damping gasket; 91. clamp. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only 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 ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Example 1

[0022] like Figures 1 to 3 As shown;

[0023] A multi-blade centrifugal fan with exhaust gas aftertreatment includes a volute 1 and a mixing pipe 2 mounted at the air outlet of the volute 1. A catalytic device housing 3 is fixed to the top of the mixing pipe 2. A primary adsorption layer 31 is fixed to the end of the catalytic device housing 3 near the mixing pipe 2. An adsorption catalytic layer 32 is fixed to the end of the catalytic device housing 3 away from the mixing pipe 2. Symmetrically arranged air inlets 7 are opened on both sides of the volute 1. A fixing bracket 4 fixed to the volute 1 is provided at the air inlet 7. An outer rotor motor 5 is fixed between the two fixing brackets 4. An impeller 6 is mounted on the outer rotor of the outer rotor motor 5. One of the air inlets 7 is connected to the exhaust pipe via a connecting pipe 71.

[0024] In this embodiment: when the utility model is in operation, the outer rotor motor 5 is started, and the outer rotor motor 5 drives the impeller 6 to rotate, so that the air is compressed and transported to the mixing pipe 2, and the outside air enters the volute 1 through the air inlet 7. Since air inlets 7 are opened on both sides of the volute 1, one of the air inlets 7 is connected to the connecting pipe 71, so that the exhaust gas can enter the volute 1 from one side of the volute 1, and the air inlet 7 on the other side is exposed, so that the air enters the volute 1, and the air and exhaust gas are mixed through the mixing pipe 2 and enter the catalytic device shell 3. This process dilutes the exhaust gas. The diluted exhaust gas is preliminarily adsorbed and treated by the primary adsorption layer 31, and then catalytically decomposed by the adsorption catalytic layer 32 and discharged. The utility model uses the symmetrically opened air inlets 7 to allow air and exhaust gas to be sucked into the volute 1 in equal proportions, thereby diluting the exhaust gas. Since the catalytic decomposition efficiency of the catalytic device shell 3 is limited, the diluted exhaust gas is more fully in contact with the catalytic device shell 3, avoiding the situation where the discharged gas is not completely decomposed and treated.

[0025] More specifically:

[0026] In an optional embodiment, a guide plate 21 is fixed on the inner side of the mixing pipe 2 , and the guide plate 21 is a spiral auger structure.

[0027] In this embodiment, through this design, the exhaust gas and air can be fully mixed inside the mixing pipe 2, thereby achieving the effect of uniformly diluting the exhaust gas.

[0028] Going further:

[0029] In an optional embodiment, a base 8 is provided at the bottom of the volute 1, and a concave mounting groove is provided on the surface of the base 8. A damping gasket 9 is fixed in the mounting groove. The surface of the damping gasket 9 matches the volute 1, and the volute 1 is installed on the damping gasket 9.

[0030] In this embodiment: through this design, the base 8 allows the utility model to be stably installed in the working position, and the damping gasket 9 fixes and stores the volute 1, which can reduce the noise and vibration generated during the operation of the utility model and further improve the stability of the utility model.

[0031] Going further:

[0032] In an optional embodiment, clamps 91 are fixed on both sides of the damping gasket 9, the damping gasket 9 and the clamps 91 cover the outer wall of the volute 1, and the connected ends of the two clamps 91 are fixed by screws.

[0033] In this embodiment, through this design, the hoop 91 is arranged around the volute 1 , so that the volute 1 and the damping gasket 9 are firmly connected, and it is convenient to install and remove the utility model from the base 8 .

[0034] Going further:

[0035] In an optional embodiment, the fixing bracket 4 is a Y-shaped plate structure, and the center of the fixing bracket 4 is fixedly connected to the inner stator of the outer rotor motor 5 .

[0036] In this embodiment, this design facilitates the stable installation of the outer rotor motor 5 in the volute 1 , while also preventing the fixing bracket 4 from affecting the air entering the volute 1 .

[0037] Going further:

[0038] In an optional embodiment, the ratio of the inner diameters of the mixing tube 2 and the catalyst device housing 3 is 1:1.5.

[0039] In this embodiment: through this design, when the exhaust gas enters the catalyst device shell 3 through the mixing pipe 2, the flow velocity of the exhaust gas will be reduced due to the larger inner diameter of the catalyst device shell 3, which is more conducive to the adsorption treatment of the exhaust gas by the primary adsorption layer 31 and the adsorption catalytic layer 32.

[0040] The working principle and use process of the present invention: When the present invention is in operation, the outer rotor motor 5 is started, and the outer rotor motor 5 drives the impeller 6 to rotate, so that the air is compressed and transported to the mixing pipe 2, and the outside air enters the volute 1 through the air inlet 7. Since the volute 1 is provided with air inlets 7 on both sides, one of the air inlets 7 is connected with a connecting pipe 71, so that the exhaust gas can enter the volute 1 from one side of the volute 1, and the air inlet 7 on the other side is exposed, so that the air enters the volute 1, and the air and the exhaust gas are mixed through the mixing pipe 2 and enter the catalytic device housing 3. When the exhaust gas enters the catalytic device housing 3 through the mixing pipe 2, due to the catalytic The inner diameter of the device housing 3 is large, and the flow velocity of the exhaust gas will be reduced, which is more conducive to the adsorption treatment of the exhaust gas by the primary adsorption layer 31 and the adsorption catalytic layer 32; the guide plate 21 of the spiral auger structure is conducive to the mixing and dilution of the gas. The diluted exhaust gas is initially adsorbed by the primary adsorption layer 31 and then discharged after catalytic decomposition by the adsorption catalytic layer 32; the utility model uses symmetrically opened air inlets 7 to allow air and exhaust gas to be drawn into the volute 1 in equal proportions, thereby diluting the exhaust gas. Due to the limited catalytic decomposition efficiency of the catalytic device, the diluted exhaust gas is more fully in contact with the catalytic device, avoiding the situation where the discharged gas is not completely decomposed;

[0041] The holding hoop 91 of the present invention is arranged around the volute 1, so that the volute 1 and the damping gasket 9 are firmly connected, and it is convenient to install and disassemble the present invention from the base 8. The base 8 enables the present invention to be stably installed in the working position. The damping gasket 9 fixes and stores the volute 1, which can reduce the noise and vibration generated during the operation of the present invention, and further improve the stability of the present invention.

[0042] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A multi-blade centrifugal fan with exhaust gas post-treatment, characterized in that: The invention comprises a volute (1) and a mixing tube (2) installed at the air outlet of the volute (1), a catalytic device shell (3) is fixed to the top of the mixing tube (2), a primary adsorption layer (31) is fixed at one end of the catalytic device shell (3) close to the mixing tube (2), and an adsorption catalytic layer (32) is fixed at one end of the catalytic device shell (3) away from the mixing tube (2), symmetrical air inlets (7) are provided on both sides of the volute (1), a fixing bracket (4) fixed to the volute (1) is provided at the air inlet (7), an outer rotor motor (5) is fixed between the two fixing brackets (4), an impeller (6) is installed on the outer rotor of the outer rotor motor (5), and one of the air inlets (7) is connected to the exhaust pipe through a connecting pipe (71).

2. The multi-blade centrifugal fan with exhaust gas post-treatment according to claim 1, characterized in that: A guide plate (21) is fixed on the inner side of the mixing tube (2), and the guide plate (21) is a spiral auger structure.

3. The multi-blade centrifugal fan with exhaust gas post-treatment according to claim 1, characterized in that: A base (8) is provided at the bottom of the volute (1), and a mounting groove with a concave structure is provided on the surface of the base (8), in which a damping gasket (9) is fixed, and the surface of the damping gasket (9) matches the volute (1), and the volute (1) is mounted on the damping gasket (9).

4. The multi-blade centrifugal fan with exhaust gas post-treatment according to claim 3, characterized in that: Hoops (91) are fixed on both sides of the damping gasket (9), and the damping gasket (9) and the hoop (91) cover the outer wall of the volute (1). The connected ends of the two hoop (91) are fixed by screws.

5. The multi-blade centrifugal fan with exhaust gas post-treatment according to claim 1, characterized in that: The fixing bracket (4) is a Y-shaped plate structure, and the center of the fixing bracket (4) is fixedly connected to the inner stator of the outer rotor motor (5).

6. The multi-blade centrifugal fan with exhaust gas post-treatment according to claim 1, characterized in that: The ratio of the inner diameters of the mixing tube (2) and the catalytic device housing (3) is 1:1.5.

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