CN105351994A - Multi-stage filtering device used for removing oil fume - Google Patents

Abstract

The invention discloses a multi-stage filter device for oil fume removal, which comprises: a casing (1) with an opening below, a fan (6) installed in the casing (1) for providing negative pressure suction, and An oil fume passage is formed between the fan (6) and the opening of the casing (1), and the oil fume collection cover (2) connected to the casing (1) and the vapor-liquid barrier assembly (3 ), at least one vapor-liquid separation assembly (4) and a multi-stage filter (5), and the vapor-liquid separation assembly (4) includes an oil baffle (41), an oil collecting plate fixedly connected to the lower side of the oil baffle (41) A cover (43) and a separation disc (42) arranged between the oil baffle (41) and the oil collection cover (43). The utility model has the advantages of simple structure, high oil fume removal efficiency and easy disassembly and maintenance.

Description

Multi-stage filter unit for oil fume removal

technical field

The invention relates to oil fume separation and purification technology, in particular to a multi-stage filter device for oil fume removal.

Background technique

Restaurants, restaurants, hotels and other catering industries and households produce a lot of fume and exhaust gas during the process of cooking and processing food. In addition to water vapor, oil mist and fine particles, the fume also contains volatile substances and odorous gases. In order to purify the air and reduce pollution, the State Environmental Protection Administration promulgated the "Catering Fume Emission Standard" (GB18483-2001) in 2000, stipulating that catering units must install soot purification equipment and meet the specified emission requirements.

In order to filter the pollutants and odorous substances in the kitchen fume and improve the quality of the fume exhaust air, some people have proposed a variety of fume filtration and purification technologies: such as using chemical solvents for cleaning, but replacement and waste water treatment are also difficult problems; another example is the use of electrostatic The treatment device can filter the particles in the oil fume, but it is not easy to remove the oil components in the air. When the electrostatic plate has oil stains attached to the surface, it will gradually reduce the ability of the electrostatic treatment device to absorb the particles in the oil fume.

Contents of the invention

The technical problem to be solved by the present invention is to propose a multi-stage filter device for removing oil fume with simple structure and high oil fume removal efficiency.

A multi-stage filter device for oil fume removal, which includes: a housing with an opening below, a fan installed in the housing to provide negative pressure suction, and an oil fume passage is formed between the fan and the opening of the housing, and the The oil fume passage is sequentially provided with an oil fume collection cover connected to the housing, a vapor-liquid grille assembly, at least one vapor-liquid separation assembly and a multi-stage filter from bottom to top;

Among them, the gas-liquid separation assembly includes: an oil baffle plate with a receiving hole in the middle, and the accommodating hole has a flange extending downward; an oil collection cover fixedly connected to the lower side of the oil baffle plate, and the inner side There is an oil collection groove at the edge; the separation disk is arranged between the oil baffle plate and the oil collection cover, and the transmission motor is fixedly connected with the middle part of the separation disk; the outer diameter of the separation disk is larger than the diameter of the receiving hole, and the inner diameter of the oil collection groove is smaller than The diameter of the receiving hole.

Wherein, the separation disc includes a fixed disc, a plurality of elongated blades connected to the fixed disc and uniformly distributed radially at the center of the fixed disc, and there is a gap between the connected blades; it is arranged at the center of the fixed disc and connected to the transmission The rotating shaft of the motor is fixedly connected with the fixed shaft, and the cover plate is connected with the end of the fixed shaft.

Wherein, the blade includes a fixed piece fixedly connected with the fixed plate, and a separation piece connected with the fixed piece, and the separation piece is L-shaped.

Wherein, in the upper surface of the separation disk, the area S2 of the gap between all the vanes accounts for 10%-50% of the upper surface area S1 of the separation disk.

Wherein, the product S0 of the number of vanes contained in the separation disc and the surface area of each vane participating in the oil fume separation, the ratio between the product S0 and the area S2 of the gap contained in the upper surface of the separation disc is greater than 20.

Wherein, the distance between the lower edge of the flange and the upper surface of the separation disc is less than 10 mm.

Wherein, the oil collecting tank is connected with an oil guide pipe.

Wherein, the vapor-liquid barrier assembly includes a first group of barrier plates and a second group of barrier plates oppositely arranged, there is a first gap between two adjacent barrier plates of the first group of barrier plates, and the second group of barrier plates There is a second gap between two adjacent grid plates of the grid plate, and the first gap and the second gap are staggered. In the first group of grid plates, each grid plate is set with the concave surface facing upwards, and the second gap Each grid plate in the two groups of grid plates is arranged with the concave surface facing downwards.

Wherein, the area of the first gap and the area of the second gap respectively account for 20% to 40% of the plane area where the first group of grid plates are located and the plane area of the second group of grid plates. The longitudinal height between the two groups of grid plates is at least twice the transverse width of the first gap.

Among them, the multi-stage filter includes an electrostatic filter plate for removing smoke and dust in the gas and a set of filter plates with filter holes arranged in order from large to small.

Compared with the prior art, the present invention has the following beneficial effects:

1. In this application, a vapor-liquid isolation chamber, a vapor-liquid separation chamber and a filter chamber are arranged in sequence on the oil fume passage, first to separate the oil in the oil fume, and then to filter out the dust particles in the oil fume, to remove the purified gas, and to remove the oil fume The effect is very good.

2. This application further improves the structure of the vapor-liquid separation assembly. On the one hand, by setting the ratio of the gap for the oil fume to pass through to the upper surface of the separation disc, and the gap between the total surface area of the blade participating in the oil fume separation and the upper surface of the separation disc The ratio between the areas makes the vapor-liquid separation component have an efficient oil removal effect. On the other hand, by setting the flange in the accommodation hole of the oil baffle, all the separated oil droplets or water-oil mixture flow into the oil collection cover The oil collecting tank improves the oil fume purification effect.

3. The oil collection cover is directly fixed on the lower side of the oil baffle by screws. After removing the oil collection cover, the separation disc and motor can be taken out; the fan and filter also adopt modular design. Therefore, the application is convenient for assembly, disassembly and maintenance.

4. This application uses a combination of multi-stage filters, which can effectively filter out smoke and dust particles, and the filtering effect is good.

Description of drawings

Fig. 1 is a kind of cross-sectional structure schematic diagram of the multi-stage filtering device of the present application;

Fig. 2 is the enlarged schematic view of part a in Fig. 1;

Fig. 3 is another kind of cross-sectional structure schematic diagram of the multi-stage filtering device of the present application;

Fig. 4 is a three-dimensional structural schematic diagram of a vapor-liquid separation assembly;

Fig. 5 is a schematic cross-sectional structure diagram of a vapor-liquid separation assembly;

Fig. 6 is a schematic diagram of the exploded structure of the separation disc in the vapor-liquid separation assembly;

FIG. 7 is a schematic diagram of an exploded structure corresponding to FIG. 4 .

Fig. 8 is a perspective view of one embodiment of the blade.

Fig. 9A, Fig. 9B and Fig. 9C are schematic diagrams of the angular position relationship between three blades with different structures and the rotation direction A of the separation disc and the oil fume suction direction B respectively.

detailed description

As shown in Figures 1-3, the present application proposes a multi-stage filter device for oil fume removal, the multi-stage filter device includes a housing 1 and a fan 6 installed in the housing 1 for providing negative pressure suction, The bottom of the housing 1 is provided with an opening, and an oil fume passage is formed between the opening of the housing 1 and the fan 6, and an oil fume collection cover 2 and a vapor-liquid barrier assembly 3 installed under the housing 1 are sequentially arranged on the oil fume passage , and at least one vapor-liquid separation assembly 4 and a multi-stage filter 5 installed in the housing 1 .

Among them, a vapor-liquid separation chamber is formed between the vapor-liquid barrier assembly 3 and the vapor-liquid separation assembly 4, a vapor-liquid separation chamber is formed between the vapor-liquid separation assembly 4 and the multi-stage filter 5, and the multi-stage filter 5 and the fan 6 The part of the cavity where it is located is the filter cavity. Therefore, under the action of the negative pressure suction of the fan 6, the oily fumes are purified through the vapor-liquid separation chamber, the vapor-liquid separation chamber and the filter chamber from bottom to top, and the purified air is discharged by the fan 6.

Wherein, the oil fume collecting cover 2 has a larger size than the opening below the housing 1, so as to facilitate collecting the oil into the oil fume passage.

As shown in Figure 2, the vapor-liquid grille assembly 3 is used to provide oil smoke with a flow channel from bottom to top, and the water-oil mixed liquid that may drop from the vapor-liquid separation assembly 4 cannot pass through the vapor-liquid grille assembly 3 . Specifically, the vapor-liquid barrier assembly 3 includes a first set of barrier plates 31 and a second set of barrier plates 32 that are oppositely arranged. Gap, there is a second gap between two adjacent grid plates of the second group of grid plates 32, and the first gap and the second gap are staggered; the middle part of the grid plate is concave than the two sides, wherein the first Each grid plate in one group of grid plates 31 is set with the concave surface facing upwards, and each grid plate in the second group of grid plates 32 is set with the concave surface facing down; and the first group of grid plates 31 The lower end is connected to the oil collection tank. In addition, the area of the first gap accounts for 20% to 40% of the plane area where the first group of grid plates 31 is located, and the area of the second gap accounts for 20% to 40% of the plane area where the second group of grid plates 32 is located. The height between one set of barrier plates 31 and the second set of barrier plates 32 is at least twice the width of the first gap. In this way, the oil fume enters the vapor-liquid isolation chamber through the first gap and the second gap, and part of the oil fume condenses in the vapor-liquid isolation chamber or the oil-water mixed liquid splashed out by the vapor-liquid separation assembly 4 will pass through the first group of isolation chambers. The grid plate of the grid plate 31 guides the flow to the oil liquid collection tank without falling below the vapor-liquid grid assembly 3 .

The vapor-liquid separation assembly 4 is used to separate the oil fumes entering the vapor-liquid isolation chamber from oil droplets. Further combined with Fig. 4-Fig. 7, the vapor-liquid separation assembly 4 includes: an oil baffle 41, the middle part of the oil baffle 41 is provided with a receiving hole 411, and the receiving hole 411 has a flange 412 extending downward; Fixedly connected to the oil collection cover 43 on the lower side of the oil baffle 41, the inner edge of the tank body of the oil collection cover 43 is provided with an oil collection groove 431, and the oil collection groove 431 is connected to an oil guide pipe 45; it is arranged on the oil baffle 41 and The separating disc 42 between the oil collecting covers 43, the transmission motor 44 fixedly connected to the middle part of the rotating shaft and the separating disc 42. Wherein, the outer diameter of the separation disc 42 is larger than the opening diameter of the accommodation hole 411 of the oil baffle plate 41, and the distance between the flange 412 of the accommodation hole 411 and the upper surface of the separation disc 42 is less than 10 mm, and the inner diameter of the oil collection groove 431 is less than The opening diameter of the receiving hole 411 .

Separation disc 42 comprises: the fixed disc 421 that is provided with several fixed holes 4211, is distributed radially with the center of fixed disc 421 and is riveted in some elongated blades 422 in one of them fixed hole 4211 by rivet; The center of 421 is a fixed shaft 423 fixedly connected with the rotating shaft of the transmission motor 44 , and the end of the fixed shaft 423 is fixedly connected with the fixed disk 421 and the blade 422 through the cover plate 423 . Certainly, the blade 422 is fixedly connected with the fixed disk 421 by any conventional connection means such as welding or riveting.

In order to ensure that the vapor-liquid separation assembly 4 has a high-efficiency separation capability, the application sets the structure of the separation disc 42 as follows: 1. the area S1 of the upper surface of the separation disc 42, the gap between adjacent blades 422 in the area S1 The sum of the surface areas is S2, then the ratio of S1 to S2 is between 2 and 10, that is, 2<S1/S2<10, that is to say, the sum of the surface areas of the gaps between adjacent blades 422 is S2, which accounts for the separation disc 42 10%～50% of the area S1 of the upper surface; ②The product S0=N*S3 of the number N of blades 422 contained in the separation disc 42 and the surface area S3 of each blade 422 participating in the oil fume separation part, the product S0 The ratio to the sum S2 of the surface areas of all gaps in the upper surface of the separation disc 42 is greater than 20, ie S0/S2 is greater than 20.

For example, with the area S1=88000mm ² of the upper surface of the separation disc 42, the surface area S3=8800mm ² of the oil fume separation part of a single blade 422, at this time, the above S1/S2 can be changed correspondingly by changing the number N of the blades 422 The ratio of and the ratio of S0/S2 above. After testing, the degreasing ability of the vapor-liquid separation component 4 for the separation of oil and gas from the oil fume at different N is shown in Table 1 below:

test N (piece) S1(mm ² ) S2(mm ² ) S3(mm ² ) S0=N*S3 S1/S2 S0/S2 Degreasing ability 1 50 88000 58000 8800 440000 1.5 7.6 73.10% 2 60 88000 52000 8800 528000 1.7 10.2 82.90% 3 75 88000 43000 8800 660000 2.0 15.3 89.40% 4 85 88000 37000 8800 748000 2.4 20.2 93.40% 5 90 88000 34000 8800 792000 2.6 23.3 96.50% 6 100 88000 28000 8800 880000 3.1 31.4 99.20% 7 125 88000 13000 8800 1100000 6.8 84.6 98.10% 8 133 88000 8200 8800 1170400 10.7 142.7 87.60% 9 145 88000 1000 8800 1276000 88.0 1276.0 77.30%

Table 1

It can be seen from the above table 1 that after the above-mentioned setting of the separation disc 42, when 2<S1/S2<10 and S0/S2>20, the degreasing ability of the vapor-liquid separation assembly 4 for the separation of oil and gas in the oil fume reaches the best, The oil removal ability can reach 93%-99%, and the separation ability is far stronger than the existing oil fume separation and purification equipment.

As shown in FIG. 8 , in one embodiment, the blade 422 includes a fixed piece 4221 fixedly connected to the fixed plate 421 and a separation piece 4222 connected to the fixed piece 4221 , and the separation piece 4222 is L-shaped. The cross-sectional structure of the blade 422 in this embodiment is shown in FIG. 9A . Wherein, only the separation sheet 4222 participates in the oil fume separation, so when calculating the surface area S3 of each blade 422 involved in the oil fume separation, the surface area S3 is the area of one side of the separation sheet 4222 .

Further referring to FIG. 9B and FIG. 9C , the separator 4222 may only be in the shape of a strip. At the same time, as shown in Figures 9A-9C, the installation direction of the separation piece 4222 of the blade 422 forms an included angle of 0-90° with the oil fume suction direction B, and the angle between the rotation direction A of the separation disc and the separation piece 4222 is 0 ~90°.

Therefore, the vapor-liquid isolation chamber is a cavity formed between the oil baffle plate 41 and the vapor-liquid barrier assembly 3, and the oil fume entering the vapor-liquid isolation chamber can only enter the vapor-liquid through the separation disc 42 under the negative pressure suction of the fan 6. In the separation chamber, the transmission motor 44 drives the separation disc 42 to rotate at a high speed, and the blade 422 continuously hits the oil fume, so that the water vapor and oil gas in the oil fume form small oil droplets or oil-water mixed droplets, most of which are thrown by the separation disc 42 to the oil collection cover 43 After that, it flows into the oil collecting groove 431 , and a small amount of oil droplets are thrown to the lower side of the oil baffle plate 41 and blocked by the flange 412 of the receiving hole 411 , and finally flows into the oil collecting groove 431 .

A partition 51 is arranged above the transmission motor 44 , the cavity formed between the partition 51 and the oil baffle 41 is a vapor-liquid separation chamber, and the cavity formed between the top of the partition 51 and the housing 1 is a filter cavity. After the oil fume is deoiled in the gas-liquid separation chamber by the gas-liquid separation assembly 4 , it enters the filter chamber through the through hole provided on the partition plate 51 . A multi-stage filter 5 is installed in the filter chamber, and the multi-stage filter 5 includes an electrostatic filter plate for removing smoke and dust in the gas and a set of filter plates with filter holes arranged in order from large to small. The purified air after passing through the multi-stage filter 5 is extracted by the fan 6 and discharged from the housing 1 .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (9)

1. for the Multistage filtering device of fume eliminating, it is characterized in that, comprise: below is provided with the housing (1) of opening, be arranged in housing (1) for providing the blower fan (6) of negative-pressure sucking, and form oil smoke passage between the opening of blower fan (6) and housing (1), oil smoke passage is provided with cooking fume-collecting cover (2), vapour-liquid barrier assembly (3), at least one vapor-liquid separation assembly (4) and multistage filter (5) from the bottom to top successively that be connected with housing (1);

Wherein, vapor-liquid separation assembly (4) comprising: middle part is provided with the oil baffle (41) of an accommodation hole (411), and this accommodation hole (411) has extended flange (412) downwards; Be fixedly connected on the oil pooling hood (43) of oil baffle (41) downside, the inside edge place of this oil pooling hood (43) is provided with oil trap (431); Be arranged at the separator disk (42) between oil baffle (41) and oil pooling hood (43), the driving motor (44) be fixedly linked with the middle part of separator disk (42); The external diameter of separator disk (42) is greater than the diameter of accommodation hole (411), and the internal diameter of oil trap (431) is less than the diameter of accommodation hole (411);

Wherein, separator disk (42) comprises fixed disk (421), it is upper and with the blade (422) of the center of fixed disk (421) equally distributed some strips to be radially connected to fixed disk (421), and has gap between the blade (422) be connected; Be arranged on fixed disk (421) center and with the fixed axis (423) that the rotating shaft of driving motor (44) is fixedly linked, the cover plate (423) be connected with the end of fixed axis (423).

2. the Multistage filtering device for fume eliminating according to claim 1, it is characterized in that, blade (422) comprises the stator (4221) be fixedly linked with fixed disk (421), and being connected and fixed the separate sheet (4222) of sheet (4221), this separate sheet (4222) is L shape.

3. the Multistage filtering device for fume eliminating according to claim 1, it is characterized in that, in the upper surface of separator disk (42), the area S2 in the gap between all blades (422) accounts for 10% ~ 50% of the upper surface area S1 of separator disk (42).

4. the Multistage filtering device for fume eliminating according to claim 1, it is characterized in that, the quantity of the blade (422) contained in separator disk (42), participate in the product S0 of the surface area of oil smoke separate section with each blade (422), the ratio between the area S2 in the gap contained by upper surface of this product S0 and separator disk (42) is greater than 20.

5. the Multistage filtering device for fume eliminating according to claim 1, is characterized in that, the spacing between the lower edge of flange (412) and the upper surface of separator disk (42) is less than 10mm.

6. the Multistage filtering device for fume eliminating according to claim 1, is characterized in that, this oil trap (431) connects an oil guide pipe (45).

7. the Multistage filtering device for fume eliminating according to claim 1, it is characterized in that, vapour-liquid barrier assembly (3) comprises the first group of grid plate (31) and second group of grid plate (32) that are oppositely arranged, between the adjacent two panels grid plate of first group of grid plate (31), there is the first gap, between the adjacent two panels grid plate of second group of grid plate (32), there is the second gap, and stagger and arrange in the first gap and the second gap, in first group of grid plate (31), every sheet grid plate is concave surface and arranges upward, and every sheet grid plate is concave surface and arranges down in second group of grid plate (32).

8. the Multistage filtering device for fume eliminating according to claim 7, it is characterized in that, the area in the first gap, the area in the second gap longitudinal direction accounted for respectively between 20% ~ 40%, first group of grid plate (31) of first group of grid plate (31) place area of plane and second group of grid plate (32) place area of plane and second group of grid plate (32) is highly at least 2 times of the transverse width in the first gap.

9. according to the Multistage filtering device for fume eliminating of claim 1-8 described in any one, it is characterized in that, multistage filter (5) comprises the filter of electro static filtering plate for removing flue dust in gas and one group of filter bores aperture descending setting successively.