A composite oil fume purification system

Abstract

The present disclosure provides a composite oil fume purification system, comprising: a centrifugal filtration oil fume purifier with filter materials filled therein, and at least one sub-air duct formed on the filter materials, wherein at least one sub-air duct is spiral, so that when oil fume rotates and flows in the sub-air duct, large particulate matter in the oil fume is subjected to a first filtration treatment to obtain the oil fume after the first filtration; and an electrostatic oil fume purifier for performing a second filtration treatment on the oil fume after the first filtration to obtain the oil fume after the second filtration.

Description

Technical Field

[0001] The present disclosure relates to the field of air purification or kitchen fume exhaust treatment, and particularly to a composite fume purification system. Background Art

[0002] With the rapid development of the catering industry in China, the number of various restaurants and eateries has increased sharply, resulting in a large amount of cooking fume emissions. Cooking fume is a gas-liquid-solid three-phase mixture produced after edible oil and food undergo intense and complex chemical changes at high temperatures, with complex and diverse components. There are more than 200 kinds of volatile organic compounds detected in the fume, including various mutagenic and carcinogenic toxic substances such as aldehydes, ketones, hydrocarbons, fatty acids, alcohols, aromatic compounds, esters, and heterocyclic compounds. Many respiratory diseases are related to exposure to cooking fume. Cooking fume has become the third largest air pollutant after industrial emissions and vehicle exhaust.

[0003] Due to the high concentration and complex composition of the generated fume, and most domestic restaurants having relatively low investment costs, the technical level of the fume purification equipment adopted is relatively low. Currently, the following are several domestic fume purification methods:

[0004] (1) Centrifugal separation device: The purification efficiency is affected by the fan speed. The faster the speed, the better the purification effect. However, increasing the speed will also lead to an increase in its own resistance and power consumption. The self-friction coefficient of the metal grid will also affect the purification efficiency because a decrease in the friction coefficient will result in a decrease in the collision probability between fume particles and the metal mesh turntable; the purification efficiency is only 30%, and the cleaning and maintenance workload is large.

[0005] (2) Filtration adsorption method: As the usage time increases, the particulate matter and oil droplets trapped in the filter media layer have a very high viscosity and are difficult to remove from the surface of the filter media layer. It has a high removal rate for relatively large cooking fume particles, but it cannot achieve deep fume purification.

[0006] (3) Wet adsorption method: It has a high removal rate for particulate matter with a particle size less than 2μm. However, when the particulate matter is less than 1μm, the particle capture efficiency is poor, and this method has the disadvantages of water consumption, power consumption, and chemical agent consumption, and is also prone to cause secondary pollution.

[0007] (4) High-voltage electrostatic method: Although this method has the advantages of high purification efficiency and low body resistance, long-term use is likely to cause oil scale deposition on the electrode plates, reducing the charge-carrying capacity, affecting the purification efficiency, being difficult to clean in the later stage, prone to causing fires, and requiring regular cleaning by professionals, resulting in relatively large losses.

[0008] The purification equipment and methods in the prior art have relatively low purification efficiency, and also have relatively high noise and high maintenance costs during the purification process. Summary of the Invention

[0009] In view of the above problems, the present disclosure provides a composite oil fume purification system to solve the above technical problems.

[0010] One aspect of the present disclosure provides a composite oil fume purification system, including: a centrifugal filtration oil fume purifier, which is filled with filter materials inside, and at least one sub-air duct is formed on the filter materials, wherein at least one sub-air duct is spiral, so that when the oil fume rotates and flows in the sub-air duct, the large particulate matter in the oil fume is subjected to a first filtration treatment to obtain the oil fume after the first filtration; an electrostatic oil fume purifier, which is used to perform a second filtration treatment on the oil fume after the first filtration to obtain the oil fume after the second filtration.

[0011] Further, the electrostatic oil fume purifier includes: at least one group of cathode filter meshes and anode filter meshes arranged alternately, wherein the cathode filter meshes are used to release electrons to make the oil fume particles in the oil fume after the first filtration charged; the anode filter meshes are used to adsorb the charged oil fume particles to obtain the oil fume after the second filtration.

[0012] Further, the system further includes: a header tank, which is arranged between the centrifugal filtration oil fume purifier and the electrostatic oil fume purifier, and is used to perform a mixing treatment on the oil fume after the first filtration to obtain the mixed oil fume.

[0013] Further, the filter material is one or more of sponge, non-woven fabric, activated carbon, and molecular sieve inorganic materials, and is used to adsorb the large particulate matter in the oil fume.

[0014] Further, the system further includes: an induced draft fan, which is connected to the output end of the electrostatic oil fume purifier through a pipeline, and is used to provide power for the oil fume during the flowing process.

[0015] Further, the cross-sectional size of the air duct inlet of the centrifugal filtration oil fume purifier is the same as that of the pipeline for transporting the oil fume.

[0016] Further, the cross-sectional size of each sub-air duct is inversely proportional to the number of the arranged sub-air ducts.

[0017] Further, the shapes of each sub-air duct are the same, and their air outlets are respectively arranged on different end faces of the centrifugal filtration oil fume purifier.

[0018] Further, at least one group of cathode filter meshes and anode filter meshes are arranged alternately at equal intervals.

[0019] Further, the centrifugal filtration oil fume purifier is connected to the header tank through a pipeline, and the header tank and the electrostatic oil fume purifier are connected through a pipeline.

[0020] A composite oil fume purification system provided by the present disclosure uses centrifugal force, inertial force, secondary flow, and adsorption materials to treat large droplets in the oil fume, and then uses a high-voltage electrostatic oil fume purification device to treat the remaining small particulate matters in the oil fume. The oil fume after being filtered and treated twice by this system meets the emission standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] To more fully understand the present disclosure and its advantages, reference will now be made to the following description taken in conjunction with the accompanying drawings, in which:

[0022] Figure 1 Schematically shows a structural diagram of the composite oil fume purification system according to an embodiment of the present disclosure;

[0023] Figure 2 Schematically shows a structural diagram of the centrifugal filtration oil fume purifier according to an embodiment of the present disclosure;

[0024] Figure 3 Schematically shows a cross-sectional view of the filter material and the sub-air duct according to an embodiment of the present disclosure;

[0025] Figure 4 Schematically shows a structural diagram of the sub-air ducts of four branches according to an embodiment of the present disclosure;

[0026] Figure 5 Schematically shows a partial structural diagram of the sub-air duct according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present disclosure. In the following detailed description, for the sake of explanation, many specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. However, it is obvious that one or more embodiments can be implemented without these specific details. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concepts of the present disclosure.

[0028] The terms used herein are merely for describing specific embodiments and are not intended to limit the present disclosure. The terms "including", "comprising", etc. used herein indicate the presence of the described features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0029] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification, and should not be interpreted in an idealized or overly rigid manner.

[0030] Embodiments of the present disclosure provide a composite oil fume purification system, including: a centrifugal filtration oil fume purifier with filter materials filled inside, and at least one sub-air duct formed on the filter materials, wherein at least one sub-air duct is spiral, so that when the oil fume rotates and flows in the sub-air duct, large particulate matter in the oil fume is subjected to a first filtration treatment to obtain the oil fume after the first filtration; and an electrostatic oil fume purifier for subjecting the oil fume after the first filtration to a second filtration treatment to obtain the oil fume after the second filtration.

[0031] A composite oil fume purification system provided by the present disclosure can perform a secondary filtration treatment on oil fume through the structural optimization of the centrifugal filtration oil fume purifier and its combined use with the electrostatic oil fume purifier. The system uses centrifugal force, inertial force, secondary flow, and adsorption materials to treat large droplets in the oil fume, and then uses a high-voltage electrostatic oil fume purification device to treat the remaining small particulate matter in the oil fume. The oil fume after the secondary filtration treatment by this system meets the emission standards.

[0032] Next, the technical solutions of the present disclosure will be described in detail in conjunction with the structural schematic diagram of the composite oil fume purification system in specific embodiments of the present disclosure. It should be understood that Figures 1 to 5 the structures of the composite oil fume purification system and each module shown are only exemplary to help those skilled in the art understand the technical solutions of the present disclosure, and are not intended to limit the protection scope of the present disclosure.

[0033] Figure 1 The structural schematic diagram of the composite oil fume purification system according to the embodiment of the present disclosure is schematically shown.

[0034] As Figure 1 shown, the composite oil fume purification system includes: a centrifugal filtration oil fume purifier 10 and an electrostatic oil fume purifier 20. One end of the centrifugal filtration oil fume purifier 10 is connected to a pipeline 50 for conveying oil fume, and the other end is connected to the electrostatic oil fume purifier 20 through the pipeline 50. Among them, the centrifugal filtration oil fume purifier 10 is used to perform a first filtration treatment on large particulate matter in the oil fume to obtain the oil fume after the first filtration, and the electrostatic oil fume purifier 20 is used to perform a second filtration treatment on the oil fume after the first filtration to obtain the oil fume after the second filtration.

[0035] As Figure 2 and Figure 3As shown, on one side of the centrifugal filtration oil fume purifier 10, there is a first through hole 101 connected to the pipeline 50, and second through holes 103 are provided on other end faces. The second through holes 103 are used to output the oil fume processed by the centrifugal filtration oil fume purifier 10 for further processing. In the embodiments of the present disclosure, the interior of the centrifugal filtration oil fume purifier 10 is filled with a filtering material, and at least one sub-air duct 102 is formed on the filtering material. Among them, at least one sub-air duct 102 is spiral, so that the oil fume rotates during the flow in the sub-air duct 102, generating vortices and secondary flows to perform the first filtration treatment on the large particulate matter in the oil fume, obtaining the oil fume after the first filtration. This process utilizes centrifugal force and inertial force to process larger oil fume droplets and particles with larger particle sizes.

[0036] In the embodiments of the present disclosure, the filtering material filled in the interior of the centrifugal filtration oil fume purifier 10 can adopt various filtering materials. For example, lipophilic polymer fiber materials such as sponge and non-woven fabric, and inorganic adsorption materials such as activated carbon and molecular sieve are used to adsorb the large particulate matter in the oil fume.

[0037] Figure 4 Schematically shows the structural schematic diagram of the sub-air ducts of four branches in the embodiments of the present disclosure. As Figure 4 shown, the inlets of the sub-air ducts 102 of the four branches are all connected to the first through hole 101, and the oil fume input into the centrifugal filtration oil fume purifier 10 through the first through hole 101 is respectively filtered through the sub-air ducts of the four branches, increasing the oil fume treatment space to improve the efficiency of filtering the particles in the oil fume. As Figure 5 shown, the outer shape of each sub-air duct 102 is arc-shaped, specifically spiral, and its air duct outlet is respectively connected to the second through hole 103 on the four end faces of the centrifugal filtration oil fume purifier 10. The shapes of each sub-air duct are the same, and the cross-sectional area of the sub-air duct is approximately equal to one-fourth of the cross-sectional area of the first through hole 101.

[0038] It should be noted that in the embodiments of the present disclosure, to reduce the resistance of throttling, the sum of the cross-sectional areas of each sub-air duct can be the same as the cross-sectional area of the air duct inlet (i.e., the first through hole 101); in other actual application processes, the sizes of these two can also be different, and the embodiments of the present disclosure do not limit this.

[0039] Figure 4For exemplary illustration of the arrangement of the sub-air ducts 102 inside the centrifugal filtration fume purifier 10, it does not constitute a limitation on the structure of the centrifugal filtration fume purifier 10 in the embodiments of the present disclosure. During actual application scenarios, the number of sub-air ducts 102 inside the centrifugal filtration fume purifier 10 can be set according to the size of the kitchen and the frequency of kitchen use. One, two, three, five, or other numbers of sub-air ducts 102 can be provided inside the centrifugal filtration fume purifier 10. In the case of multiple sub-air ducts 102, the output ports of each sub-air duct 102 are respectively arranged on different end faces or different positions on the same end face of the centrifugal filtration fume purifier 10 to avoid overlap of the sub-air ducts 102. The cross-sectional size of each sub-air duct 102 is inversely proportional to the number of sub-air ducts provided. That is, when the cross-sectional size of the first through hole 101 is fixed, the more sub-air ducts are provided, the smaller the cross-sectional size of each sub-air duct 102.

[0040] In the embodiments of the present disclosure, as Figure 1 shown, the electrostatic fume purifier 20 includes at least one set of cathode filter screens 201 and anode filter screens 202 arranged alternately. Among them, the cathode filter screen 201 is used to release electrons to charge the fume particles in the fume after the first filtration, and the region where the cathode filter screen 201 is located forms a corona region. The anode filter screen 202 is used to adsorb the charged fume particles to obtain the fume after the second filtration, and the region where the anode filter screen 202 is located forms an adsorption region. Preferably, each set of cathode filter screens 101 and anode filter screens 102 are arranged alternately in parallel and at equal or unequal intervals, and the sizes of the filter screens are all the same.

[0041] It should be noted that Figure 1 the structure of the electrostatic fume purifier 20 shown in

[0042] is only for exemplary illustration, and it does not mean that the number of sets of cathode filter screens 201 and anode filter screens 202 in the electrostatic fume purifier 20 is only 2 sets. During actual application, it can be flexibly set according to the amount of fume treatment to meet the usage requirements during actual application, that is, the number of sets of alternately arranged cathode filter screens 201 and anode filter screens 202 can be 1 set, 3 sets, or other combinations of numbers. Figure 1 shown, after being mixed through the header tank 30 and then output to the electrostatic fume purifier 20 for treatment.

[0043] Specifically, the header 30 is disposed between the centrifugal filtration fume purifier 10 and the electrostatic fume purifier 20, and is used to mix the fume after the first filtration, obtain the mixed fume and output it to the electrostatic fume purifier 20. Among them, the number of through holes in the header 30 is the same as the number of sub-air ducts 102 provided inside the centrifugal filtration fume purifier 10, and they are connected in one-to-one correspondence. The electrostatic fume purifier 20 is connected to the header 30 through a pipeline 50, and the header 30 is also connected to the electrostatic fume purifier 20 through a pipeline 50. Each connection point needs to be hermetically connected to prevent the leakage of fume.

[0044] In some other embodiments, to reduce the complexity of the system and the cost of the system, multiple sub-air ducts can be merged into one air duct inside the centrifugal filtration fume purifier 10 to output the processed fume, which can avoid the setting of multiple pipelines 50 or headers 30, and effectively reduce the complexity and cost of the system.

[0045] As Figure 1 shown, the system further includes: a draft fan 40, which is connected to the output end of the electrostatic fume purifier 20 through a pipeline 50. The draft fan 40 is used to provide power for the fume during the flowing process, and the fume after being secondarily filtered by the electrostatic fume purifier 20 is discharged into the atmosphere through the draft fan 40.

[0046] After the system provided in the present disclosure is used for a certain period of time, the filter material inside the centrifugal filtration fume purifier 10 can be updated and replaced to achieve a better filtration effect, and its maintenance cost is low.

[0047] It should be noted that for the fume treatment system provided in the embodiments of the present disclosure, the structures and connection relationships of its various components are not limited to the above content and the drawings shown. For example, the outer shapes of the centrifugal filtration fume purifier 10 and the electrostatic fume purifier 20 are not limited to Figure 1 the square three-dimensional structure shown. It is also set according to actual application requirements. Improvements to the outer shapes of the centrifugal filtration fume purifier 10 and the electrostatic fume purifier 20 without violating the treatment principle of the embodiments of the present disclosure are within the scope of protection of the present disclosure.

[0048] The embodiments of the present disclosure aim to provide a system for efficiently treating fume in stages to solve the problems commonly existing in the prior art. The system uses centrifugal force, inertial force, secondary flow and adsorption materials to treat large droplets in the fume, and then uses a high-voltage electrostatic fume purification device to treat the remaining small particulate matters in the fume. The fume discharged after secondary filtration meets the emission standards.

[0049] Although the present disclosure has been illustrated and described in detail in the drawings and the foregoing description, such illustration and description should be considered illustrative or exemplary rather than restrictive. As Figures 1 to 5The figure shows a schematic structural diagram of a composite oil fume purification system according to an embodiment of the present disclosure. In actual application, some components in the composite oil fume purification system can be replaced by other components with the same or similar functions, or the structure of the experimental principle device can be simplified or complicated. This embodiment does not constitute a limitation on the composite oil fume purification system.

[0050] Those skilled in the art can understand that the features recited in the various embodiments and / or claims of the present disclosure can be combined and / or combined in a variety of scopes, even if such combinations or combinations are not explicitly recited in the present disclosure. In particular, without departing from the spirit and teachings of the present disclosure, the features recited in the various embodiments and / or claims of the present disclosure can be combined and / or combined in a variety of ways. All such combinations and / or combinations fall within the scope of the present disclosure.

[0051] Although the present disclosure has been shown and described with reference to specific exemplary embodiments of the present disclosure, those skilled in the art should understand that various changes in form and detail can be made to the present disclosure without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents. Therefore, the scope of the present disclosure should not be limited to the above embodiments, but should be determined not only by the appended claims, but also by the equivalents of the appended claims.

Claims

1. A composite oil fume purification system, characterized in that, Comprising: A centrifugal filtration oil fume purifier, which is filled with filter material inside, and at least one sub-air duct is formed on the filter material. Wherein, at least one of the sub-air ducts is in a twisted spiral shape, so that the oil fume rotates during the process of rotating and flowing in the sub-air duct, generating vortices and secondary flows to perform a first filtration treatment on large particulate matter in the oil fume, and obtaining the oil fume after the first filtration; An electrostatic oil fume purifier, which is used to perform a second filtration treatment on the oil fume after the first filtration to obtain the oil fume after the second filtration; the electrostatic oil fume purifier includes: at least one group of cathode filter meshes and anode filter meshes arranged alternately, wherein the cathode filter meshes are used to release electrons to make the oil fume particles in the oil fume after the first filtration charged; the anode filter meshes are used to adsorb the charged oil fume particles to obtain the oil fume after the second filtration; A header, which is arranged between the centrifugal filtration oil fume purifier and the electrostatic oil fume purifier, and is used to perform a mixing treatment on the oil fume after the first filtration to obtain the mixed oil fume.

2. The composite oil fume purification system according to claim 1, characterized in that, The filter material is one or more of sponge, non-woven fabric, activated carbon, and molecular sieve inorganic materials, and is used to adsorb large particulate matter in the oil fume.

3. The composite oil fume purification system according to claim 1, wherein The system further includes: A draft fan, which is connected to the output end of the electrostatic oil fume purifier through a pipeline, and is used to provide power for the oil fume during the flowing process.

4. The composite oil fume purification system according to claim 1, characterized in that, The cross-sectional size of the air duct inlet of the centrifugal filtration oil fume purifier is the same as that of the pipeline for transporting the oil fume.

5. The composite oil fume purification system according to claim 4, wherein The cross-sectional size of each sub-air duct is inversely proportional to the number of the arranged sub-air ducts.

6. The composite oil fume purification system according to claim 1, wherein Each of the sub-air ducts has the same shape, and its air outlets are respectively arranged on different end faces of the centrifugal filtration oil fume purifier.

7. The composite oil fume purification system according to claim 1, wherein, At least one group of the cathode filter meshes and the anode filter meshes are arranged alternately at equal intervals.

8. The composite oil fume purification system according to claim 1, wherein, The centrifugal filtration oil fume purifier is connected to the header through a pipeline, and the header and the electrostatic oil fume purifier are connected through a pipeline.

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