CN106839028A - A kind of kitchen fume multistage purification device - Google Patents

Abstract

The invention discloses a kitchen oil fume multi-stage purifier, which comprises a box body provided with an air inlet and an air outlet, and an ultraviolet light emitting device and a filtering device arranged inside the box body, and the ultraviolet light emitting device and the filtering device are spaced apart from each other. Set it so that there is an ultraviolet light emitting device in the middle of every two filtering devices, and when in use, the surroundings of the filtering device are in sealing contact with the box, so that the gas can only pass through the previous filtering device, and then pass through the ultraviolet light emitting device. Then pass through the next filter device to form a multi-stage filter system. Compared with the prior art, the oil fume multi-stage purifier of the present invention is easy to install, and only needs to be installed in the flue behind the outlet of the range hood; the activated carbon fiber cloth has strong adsorption capacity, which improves the comprehensive purification rate; the activated carbon fiber cloth has good air permeability, The resistance along the flue gas pipeline is small; the filter plate is easy to maintain and can be recycled; the final products of photocatalytic degradation are harmless CO ₂ and H ₂ O.

Description

A kitchen fume multi-stage purifier

technical field

The invention discloses a kitchen oil fume multistage purifier, which belongs to the technical field of oil fume purifiers.

Background technique

Oil fume is a mixed pollutant with extremely complex components and great harm. High concentrations of oil fume can cause lung symptoms and tissue cell damage, and reduce lung capacity; oil fume affects the body's cellular immunity and macrophage function, resulting in a decline in human immune function; oil fume can cause gene mutations, DNA damage, chromosome damage, etc. Substances with potential carcinogenicity. Oil fume also pollutes the surrounding air environment and affects the normal life of the surrounding residents.

The traditional external range hood is installed on the upper part of the stove, and the impeller in the volute is driven by the motor to rotate, forming a certain negative pressure in the air inlet area. Through the drainage of the smoke collecting cavity, a negative pressure zone is formed in a certain space above the stove. The oil fume gas around it passes through the filter screen under the action of pressure difference, and a part of large particle oil mist is separated by filtration, and the rest of the gas enters the centrifugal fan system inside the hood. After the high-speed rotation of the fan impeller, the oil fume gas is thrown out of the impeller by the centrifugal force, and the oil fume is separated again, and the separated oil flows into the oil cup through the oil guide system. The flue gas is discharged outside along the volute along the air duct and enters the atmosphere. The above-mentioned simple treatment cannot remove the harmful organic gases in the flue gas, so it will still cause air pollution, especially in the area near the exhaust port where the pollution gas is not fully diffused.

Contents of the invention

Purpose of the invention: In view of the fact that the existing range hoods cannot remove harmful gases in the flue gas, the present invention designs an environmentally friendly kitchen fume purification device that can completely catalyze and decompose such gases.

Technical solution: The present invention provides a kitchen oil fume multi-stage purifier, which includes a box with an air inlet and an air outlet, an ultraviolet light emitting device and a filtering device arranged inside the box, the ultraviolet light emitting device and the The filter devices are arranged at intervals, so that there is an ultraviolet light emitting device in the middle of every two filter devices, and when in use, the surroundings of the filter device are in sealing contact with the box, so that the gas can only pass through the previous filter device, and then pass through the ultraviolet light emission device. device, in order to pass through the next filter device, thus forming a multi-stage filter system.

Preferably, an air inlet and an air outlet are respectively provided on opposite sides of the box body, a box door is set on one side, and the other sides are box shells;

Further preferably, the box shell and the box door are sealed by a box door gasket and locked by an external lock; the box door is also equipped with a door handle.

Further preferably, the inner wall of the box shell is coated with a TiO ₂ photocatalytic paint coating. The photocatalytic efficiency can be improved.

Preferably, the ultraviolet light emitting device is an ultraviolet lamp with one end fixed on the side of the box, which provides energy for the photocatalytic oxidation process. The ultraviolet lamp is fixed on the side of the casing by a lamp holder, a lamp gasket and a lamp cap. There are external threads on the lamp neck that match the threaded holes on the box body, which are used to install the ultraviolet lamp emitting device on the box shell. The lamp cap is similar to a screw cap, which is inserted into the lamp neck through the external threads to fix the lamp holder, and is convenient Manual adjustment; the lamp gasket is installed between the lamp cap and the box shell, in order to prevent the oil fume from leaking at the threaded connection.

Preferably, the filter device is composed of a filter plate, a support bracket, a fixing nut and a filter plate gasket, the filter plate is installed on the support bracket, the filter plate gasket is arranged in the middle, and is sealed by the fixing nut on the box body, Make sure that the flue gas can only enter the lower filter unit after being processed by the filter element.

Further preferably, the filter plate is formed by extruding several layers of activated carbon fiber cloth filter cores from a filter screen, and the function of the filter cores is to treat harmful gases in the oil fume.

More preferably, the filter screen plate is a square ring plate and a punching plate arranged in parallel up and down, the filter screen plate close to the support bracket is a punching plate, and the one away from the support bracket is a square ring plate, and the two filter screen plates Clamp the filter element around tightly with bolts to prevent oil fumes from escaping from the surrounding gaps.

More preferably, the preparation method of the filter core is as follows: the bottom layer is placed with several sheets of _TiO prepared by dipping method Loaded activated carbon fiber cloth, the middle is the original activated carbon fiber cloth, and the top layer is also several sheets of _TiO Loaded activated carbon fiber cloth; Then these The filter element can be obtained by rolling the activated carbon fiber cloth around tightly; or a certain amount of activated carbon is filled between the activated carbon fiber cloth.

The purifier is installed between the exhaust port of the range hood and the flue. The gas that has been roughly purified by the range hood enters from the air inlet of the device, and passes through various filter layers in sequence. Harmful organic components are completely decomposed into non-toxic and harmless CO ₂ and H ₂ O, and the purified gas is discharged into the flue through the gas outlet.

Heat treatment of modified TiO ₂ at 400°C catalyzes the oxidation of cyclohexane, which can be efficiently degraded into CO ₂ and H ₂ O. When the Ti/(Ti+Ca) molar ratio was 0.2, the conversion rates of TiO ₂ photocatalytic degradation of formaldehyde and acetaldehyde reached 89.2% and 82.7%, respectively. Under the irradiation of ultraviolet light, an appropriate amount of loading can give full play to the adsorption of activated carbon and the photocatalytic function of _TiO2 , and has a good degradation effect on benzene substances. Therefore, the catalytic oxidation of _TiO2 in the present invention has a better catalytic decomposition effect on the main organic pollutants in the oil fume.

The oil fume multi-stage purifier of the present invention has the following advantages:

1. Good emission reduction effect

Traditional range hoods can only roughly separate oil fumes and remove liquid and solid products with relatively large particle sizes, but cannot handle small particles of liquid, solid and gaseous pollutants. This device can not only filter out the liquid and solid pollutants that cannot be removed by the range hood through the first-stage filter plate, but also remove various harmful gas components in the exhaust gas of the range hood, further deepen the effect of purification of the range hood, and reduce pollution emission of matter.

2. Convenient and economical use

This device is an oil fume treatment device installed at the tail of the exhaust pipe of the range hood. It can deeply purify the external exhaust fume again without affecting the basic structure inside the range hood. Since this device is directly installed at the tail of the smoke exhaust pipe, it is very convenient to disassemble and clean, and it can efficiently treat the pollution components of the oil fume tail gas, so it has strong practical value. The filter layers of the same level do not affect each other and are easy to disassemble and replace. The filter layer can be recycled, calcined and reused, which not only prolongs the service life of the device, but also saves costs.

3. Efficient device structure

The complex pore structure of activated carbon fiber cloth improves the dispersion of TiO ₂ , thereby increasing the contact area between oil fume and TiO ₂ , and finally improving the purification efficiency. In addition, activated carbon fiber cloth can absorb harmful substances that cannot be degraded in time, and has a buffering effect. When the oil fume flow rate is small, the harmful gas adsorbed in activated carbon is released due to diffusion and completely degraded under the action of photocatalyst.

Technical effect: Compared with the prior art, the oil fume multi-stage purifier of the present invention is easy to install, and only needs to be installed in the flue behind the outlet of the range hood; the activated carbon fiber cloth has strong adsorption capacity, which improves the comprehensive purification rate; the air permeability of the activated carbon fiber cloth Good performance, the resistance along the flue gas pipeline is small; the filter plate is easy to maintain, and can be recycled; the final products of photocatalytic degradation are harmless CO ₂ and H ₂ O.

Description of drawings

Fig. 1 is a side sectional view of the kitchen fume multi-stage purifier of the present invention—the overall structure;

Fig. 2 is a side sectional view of the kitchen fume multi-stage purifier according to the present invention-detailed structure;

Fig. 3 is an external top view of the kitchen fume multi-stage purifier according to the present invention;

Fig. 4 is a three-dimensional cross-sectional view of the kitchen fume multi-stage purifier according to the present invention;

Fig. 5 is a schematic structural view of a filter plate in the kitchen fume multi-stage purifier according to the present invention;

detailed description

Below in conjunction with accompanying drawing and specific examples, further illustrate the present invention, should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various equivalents of the present invention Modifications in form all fall within the scope defined by the appended claims of this application.

As shown in accompanying drawing 1, a kind of kitchen oil fume multi-stage purifier comprises the box body 1 that is provided with air inlet and air outlet, is arranged on box body 1 interior ultraviolet light emission device 2 and filter device 3, and ultraviolet light emission The device 2 and the filter device 3 are arranged at intervals, so that there is an ultraviolet light emitting device 2 in the middle of every two filter devices 3, and when in use, the surroundings of the filter device 3 are in sealing contact with the box body 1, so that the gas can only pass through the previous filter After the device 3, it passes through the ultraviolet light emitting device 2 before passing through the next filter device 3, thereby forming a multi-stage filter system.

As shown in Figure 2, an air inlet 1-1 and an air outlet 1-2 are respectively provided on opposite sides of the box body 1, a box door 1-4 is set on one side, and box shells 1-3 are provided on the other sides;

The box shell (1-3) and the box door are sealed by the box door gasket 1-4-1, and locked by the external lock 1-3-2; the box door 1-4 is also equipped with a door handle 1- 4-2, see attached drawings 2 and 3 for details.

The inner wall of the box shell 1-3 is coated with a TiO ₂ photocatalytic paint coating. The photocatalytic efficiency can be improved.

As shown in Figure 2, the ultraviolet light emitting device 2 is an ultraviolet lamp 2-1 fixed on the side of the box 1, which provides energy for the photocatalytic oxidation process. The ultraviolet lamp 2-1 is fixed on the side of the box body 1 by the lamp holder 2-2, the lamp spacer 2-3 and the lamp cap 2-4. To install the ultraviolet lamp emitting device 2 on the box shell 1-3, the lamp cap 2-4 is similar to a nut, and is inserted into the lamp neck through external threads to fix the lamp holder 2-2 and facilitate manual adjustment; the lamp gasket 2 -3 is installed between the lamp cap 2-4 and the box shell 1-3, in order to prevent the oil fume from leaking at the threaded connection.

The filter device 3 is composed of a filter plate 3-1, a support frame 3-2, a fixing nut 3-3 and a filter plate gasket 3-4. The filter plate 3-1 is installed on the support frame 3-2, and the filter plate is arranged in the middle. The plate gasket 3-4 is sealed by the fixing nut 3-3 on the box body 1 to ensure that the flue gas can only enter the lower filter unit after being processed by the filter element, see Figures 2 and 4 for details.

As shown in Figure 5, the filter plate 3-1 is formed by extruding several layers of activated carbon fiber cloth filter core 3-1-2 from the filter screen plate 3-1-1, and the function of the filter core 3-1-2 is to treat Harmful gas in the oil fume.

The filter screen plate 3-1-1 is a square ring plate and a punching plate arranged in parallel up and down. The filter screen plate close to the support bracket 3-2 is a punching plate, and the one far away from the support bracket is a square ring plate. The mesh plate tightens the surroundings of the filter element 3-1-2 through the bolts 3-1-1-1, so as to prevent oil fumes from escaping from the surrounding spaces.

The preparation method of the filter core 3-1-2 is as follows: the bottom layer is placed with several sheets of _TiO2 loaded activated carbon fiber cloth prepared by impregnation method, the middle is the original activated carbon fiber cloth, and the top layer is also several sheets of _TiO2 loaded activated carbon fiber cloth; The filter element can be obtained by rolling the fiber cloth around tightly; or a certain amount of activated carbon is filled between the activated carbon fiber cloth.

The purification device is installed downstream of the range hood. After the cooking fume is preliminarily treated by the range hood, it enters the device through the air inlet. The first-stage filter layer first filters the small particle pollutants remaining in the fume, and the activated carbon fiber loaded with _TiO2 on the side irradiated by the ultraviolet lamp The cloth can catalyze and degrade part of the harmful gas in the oil fume, and at the same time, some harmful gas is absorbed by the activated carbon fiber cloth, and the remaining harmful gas enters the next purification layer. The purified gas is discharged into the flue through the gas outlet. When the oil fume flow rate is small, the harmful gas adsorbed by the activated carbon fiber cloth is released, and then it is degraded by _TiO2 under the irradiation of ultraviolet lamp. After a period of use, only the first-stage filter element needs to be replaced, while the other filter elements may not be replaced temporarily.

Claims (10)

1. A kitchen oil fume multi-stage purifier is characterized in that it comprises a casing (1) provided with an air inlet and an air outlet, an ultraviolet light emitting device (2) and a filtering device arranged inside the casing (1) (3), the ultraviolet light emitting device (2) and the filter device (3) are arranged at intervals, so that an ultraviolet light emitting device (2) is arranged in the middle of every two filter devices (3), and during use, the filter device (3) The surroundings are in sealed contact with the box body (1), so that the gas can only pass through the previous filter device (3), then pass through the ultraviolet light emitting device (2), and then pass through the next filter device (3), thus forming Multi-stage filtration system. 2. The kitchen fume multi-stage purifier according to claim 1, characterized in that an air inlet (1-1) and an air outlet (1-2) are respectively provided on opposite sides of the box (1) , a box door (1-4) is set on one side, and the other sides are box shells (1-3); 3. The kitchen oil fume multi-stage purifier according to claim 2, characterized in that, the space between the box shell (1-3) and the box door is sealed by a box door gasket (1-4-1), and is formed by The external lock catch (1-3-2) is locked; the box door (1-4) is also equipped with a door handle (1-4-2). 4. The kitchen oil fume multi-stage purifier according to claim 2, characterized in that, the inner wall of the box shell (1-3) is coated with a _TiO2 photocatalytic paint coating. 5. The kitchen fume multi-stage purifier according to claim 1, characterized in that, the ultraviolet light emitting device (2) is an ultraviolet lamp (2-1) with one end fixed on the side of the box body (1), which Provide energy for the photocatalytic oxidation process. 6. The kitchen fume multi-stage purifier according to claim 5, characterized in that, the ultraviolet lamp (2-1) consists of a lamp holder (2-2), a lamp gasket (2-3) and a lamp cap ( 2-4) be fixed on the side of casing (1). 7. The kitchen oil fume multi-stage purifier according to claim 1, characterized in that the filter device (3) consists of a filter plate (3-1), a support bracket (3-2), a fixing nut (3- 3) and the filter plate gasket (3-4), the filter plate (3-1) is installed on the support bracket (3-2), the filter plate gasket (3-4) is arranged in the middle, and passes through the box ( 1) The fixing nut (3-3) on the top is sealed to ensure that the flue gas can only enter the lower filter unit after being processed by the filter element. 8. The kitchen fume multi-stage purifier according to claim 7, characterized in that, the filter plate (3-1) is a filter core made of several layers of activated carbon fiber cloth extruded by the filter screen plate (3-1-1) (3-1-2), and the effect of the filter element (3-1-2) is to deal with the harmful gas in the oil fume. 9. The kitchen oil fume multi-stage purifier according to claim 8, characterized in that, the filter screen plate (3-1-1) is a square ring plate and a punching plate arranged in parallel up and down, close to the supporting bracket ( 3-2) The filter screen plate is a punching plate, and the one away from the support bracket is a square ring plate. The two filter screen plates connect the filter element (3-1-2) around Roll tightly to prevent oil fumes from escaping from the surrounding gaps. 10. The kitchen oil fume multi-stage purifier according to claim 8, characterized in that, the preparation method of the filter core (3-1-2) is as follows: the bottom layer is placed with several pieces of _TiO prepared by dipping method Loaded activated carbon fiber cloth , the middle is the original activated carbon fiber cloth, and the top layer is also several sheets of TiO ₂ loaded activated carbon fiber cloth; then these activated carbon fiber cloths are rolled tightly around to get the filter core; or a certain amount of activated carbon is filled between the activated carbon fiber cloths.