An oil fume purification device

Abstract

The application discloses an oil fume purification device, which comprises a first flue, an oil fume purifier and a second flue which are sequentially communicated; the first flue is further communicated with an air outlet of a public flue; the second flue comprises a pipeline body and a plurality of guide vanes; the bottom end of the guide vanes is fixedly connected with the inner wall of the pipeline body; the plurality of guide vanes are uniformly distributed in a plurality of layers along the circumferences of the pipeline body in the axial direction, and the guide directions are arranged in a counterclockwise direction along the radial direction of the pipeline body; the height of the guide vanes gradually decreases along the oil fume discharging direction; and the symmetric center line of the cross section of the guide vanes is a sinusoidal curve. The oil fume purification device has high integration, and the oil fume can generate cyclone with a certain centrifugal force when passing through the second flue with the guide function and the oil fume purifier, so that large-particle oil fume in the flue gas is separated, and higher oil fume purification efficiency is achieved; the structure of the oil fume purification device is simple, and the manufacturing, using and maintenance costs are low.

Description

Technical Field

[0001] This invention relates to the field of oil fume removal devices, and more particularly to an oil fume purification device. Background Technology

[0002] Cooking fumes are the large amount of thermal oxidation and decomposition products generated by cooking oil and food under high temperature conditions. In the kitchens of hotels or restaurants, the cooking fumes are first collected by fume collection equipment, and then discharged through fume purification devices to control the fumes within a certain range and prevent them from spreading into the space.

[0003] While there are many types of existing fume treatment devices, the vast majority are direct-vent exhaust fans or fume extraction equipment. The purification effect of a single device on fumes is very limited, failing to fundamentally solve the problem of fume pollution in the air. Furthermore, as a crucial component of fume extraction equipment, most fume purification devices have a straight-cylinder structure, merely serving as a passageway. The efficiency of fume flow within the duct depends solely on the power of the exhaust equipment (such as exhaust fans and vent caps). In fact, improper duct design can lead to fume accumulation and poor emission. Existing technologies employ fume purification techniques to address these issues, but common fume purification technologies suffer from high equipment costs, short effective working time of separation equipment, complex equipment structures, high operation and maintenance requirements, high operating costs, secondary pollution, and large footprint. Summary of the Invention

[0004] To address the above technical problems, this invention provides an oil fume purification device with a guide vane structure. The shape of the guide vane enables the oil fume purification device to have a certain centrifugal force cyclone, which can separate large oil fume particles from the flue gas. When combined with other oil fume purification devices in the system, it can greatly improve the oil fume purification rate of the entire system.

[0005] To achieve the above-mentioned objectives, the technical solution provided by this invention includes:

[0006] An oil fume purification device, characterized in that: it includes a first flue, an oil fume purifier, and a second flue connected in sequence; the first flue is also connected to a common flue outlet;

[0007] The second flue includes a pipe body and several guide vanes; the bottom end of the guide vanes is fixedly connected to the inner wall of the pipe body, and the several guide vanes are evenly distributed in several layers around the circumference along the axial direction of the pipe body, and the guiding direction is set counterclockwise along the radial direction of the pipe body; the height of the guide vanes gradually decreases along the direction of oil fume discharge; the center line of the cross-section of the guide vanes is a sine curve.

[0008] In some preferred embodiments, a non-powered wind cap is also included; the non-powered wind cap is connected to the second flue.

[0009] In some preferred embodiments, the height of the highest point of the guide vane is 1 / 20 to 1 / 30 of the inner diameter of the pipe body.

[0010] In some preferred embodiments, the curve equation of the guide vane height change line is: {x=100*t;z=50*sin(t*90-90)+50};where, t∈[0,1].

[0011] In some preferred embodiments, the curve equation of the symmetrical centerline shape of the guide vane cross section is: {x=100*t;z=50*sin(t*90-90)+50}.

[0012] In some preferred embodiments, the spacing between the multiple layers of guide vanes is 400-600 mm.

[0013] In some preferred embodiments, the number of guide vanes in each layer is 8.

[0014] In some preferred embodiments, an oil collection hole is provided on the wall of the pipe body.

[0015] Beneficial effects

[0016] This invention provides a highly integrated oil fume purification device. By connecting the second flue, which has a flow guiding function, with the oil fume purifier, a cyclone with a certain centrifugal force can be generated when the oil fume passes through, thereby separating large oil fume particles from the flue gas and achieving a more efficient oil fume purification efficiency. The invention has a simple structure and low manufacturing, use, and maintenance costs. Attached Figure Description

[0017] Figure 1 This is a frontal view of the overall structure in a preferred embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the axial structure of the second flue in a preferred embodiment of the present invention;

[0019] Figure 3 This is a front view schematic diagram of the second flue in a preferred embodiment of the present invention;

[0020] Figure 4 This is a schematic cross-sectional view of the second flue in a preferred embodiment of the present invention.

[0021] In the diagram: 1. Common flue; 2. First flue; 3. Fume purifier; 4. Second flue; 41. Duct body; 42. Guide vane; 5. Non-powered fan cap; Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described below with reference to the accompanying drawings. In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0023] like Figures 1-4 As shown, this embodiment provides an oil fume purification device, including a first flue, an oil fume purifier, and a second flue connected in sequence; the first flue is also connected to a common flue outlet.

[0024] The second flue includes a pipe body and several guide vanes; the bottom ends of the guide vanes are fixedly connected to the inner wall of the pipe body, and the guide vanes are evenly distributed in several layers around the axial direction of the pipe body, with the guiding direction arranged counterclockwise along the radial direction of the pipe body; the height of the guide vanes gradually decreases along the direction of oil fume discharge; the center line of the cross-section of the guide vanes is a sine curve. When there are multiple air outlets in the common flue, it is advisable to leave only one air outlet and block the others; and when the air outlet is too small, the opening of the air outlet needs to be enlarged. In some preferred embodiments, the size of the air outlet is 400mm*400mm, and it is connected to the first pipe through a transition pipe. The oil fume purifier is a commonly used oil fume purification device in the art, such as the Qianfeng brand electrostatic oil fume purifier with model number JH-DD301-4A.

[0025] The cross-sectional shape of the pipe body is preferably circular. The number of layers of guide vanes distributed axially in the pipe body is determined by the length of the pipe body. In some preferred embodiments, in order to reduce the number of layers of guide vanes while ensuring better smoke extraction effect, the interval between the multiple layers of guide vanes is 400-600mm, preferably 500mm; the number of guide vanes in each layer is 8, and they are evenly distributed on the circumference, that is, the angle between two adjacent guide vanes in the same layer and the axis of the pipe body is 45°.

[0026] In operation, the fume purifier draws oily fumes from the common flue through the first flue and discharges the treated fumes into the second flue. As the fumes flow through this section of the duct, the air near the guide vanes on the outer side rotates counterclockwise due to the vanes' guiding effect, gradually drawing air closer to the center and creating a cyclone with centrifugal force. The spaced, multi-layered guide vanes strengthen and maintain this cyclone. Therefore, the oily fume particles, being denser than air, gradually detach from the center of the duct under centrifugal force and are flung towards the periphery of the cyclone, where they are captured by the inner wall of the duct and condense into liquid oil droplets. This ultimately achieves the separation of oily fume particles. The combination of the fume purifier and the flue allows the system to achieve a higher oily fume purification rate.

[0027] In some preferred embodiments, to minimize wind noise and resistance, the height change of the blades is linearly set as a smooth curve. Specifically, the equation of the curve for the height change of the guide blades is: {x = 100 * t; z = 50 * sin(t * 90 - 90) + 50}; where t ∈ [0, 1]. In other preferred embodiments, to enhance the guiding effect and increase the centrifugal force of the cyclone generated when the fumes pass through, the equation of the curve for the symmetrical center line of the cross-section of the guide blades is: {x = 100 * t; z = 50 * sin(t * 90 - 90) + 50}. It should be understood that all guide blades have the same guiding direction, and the number and position of adjacent layers of guide blades correspond. Preferably, adjacent layers of guide blades are located on the same straight line parallel to the axial direction of the pipe body. To achieve a better guiding effect, the height of the highest point of the guide blade is 1 / 20 to 1 / 30 of the inner diameter of the pipe body.

[0028] In other preferred embodiments, it is necessary to consider more convenient collection of liquid grease condensed on the inner wall surface of the pipe body. When the fume purification device is placed horizontally, an oil collection hole can be provided on the lower side of the pipe body, so that the liquid grease condensed on the inner wall surface of the pipe body will automatically collect at the oil collection hole under the action of gravity and flow out of the fume purification device, and then undergo further treatment by other purification equipment. When the fume duct is placed vertically, a non-powered wind cap can be provided at the tail end of the pipe body. The rotation direction of the non-powered wind cap is matched with the guiding direction of the guide vanes, thereby further reducing the exhaust resistance.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil fume purification device, characterized by comprising: The first flue, the oil fume purifier and the second flue are sequentially communicated; the first flue is further communicated with the air outlet of the public flue; The second flue comprises a pipeline body and a plurality of guide vanes; the bottom end of the guide vane is fixedly connected with the inner wall of the pipeline body; the plurality of guide vanes are uniformly distributed along the axial direction of the pipeline body in a plurality of layers; the guide direction is arranged in an anticlockwise direction along the radial direction of the pipeline body; the height of the guide vane gradually decreases along the oil fume discharge direction; the symmetric center line of the cross section of the guide vane is a sinusoidal curve.

2. The oil fume purification device according to claim 1, characterized in that: The device further comprises a non-powered air cap; the non-powered air cap is communicated with the second flue.

3. The oil fume purification device according to claim 1, wherein: The height of the highest point of the guide vane is 1 / 20-1 / 30 of the inner diameter of the pipeline body.

4. The oil fume purification device according to claim 1 or 2, characterized in that: The curve equation of the height variation line type of the guide vane is: {x=100*t; z=50*sin(t*90-90)+50}; wherein, t∈[0,1].

5. The oil fume purification device according to claim 1, wherein: The curve equation of the symmetric center line type of the cross section of the guide vane is: {x=100*t; z=50*sin(t*90-90)+50}; wherein, t∈[0,1].

6. The oil fume purification device according to claim 1, wherein: The interval between the plurality of layers of guide vanes is 400-600mm.

7. The oil fume purification device according to claim 1 or 5, characterized in that: The number of guide vanes in each layer is 8.

8. The oil fume purification device according to claim 1, characterized in that: An oil collecting hole is arranged on the pipe wall of the pipeline body.

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