CN109140550B - A waste gas filtration and purification device - Google Patents

Abstract

The present invention relates to the technical field of air purification equipment, in particular to a waste gas filtration and purification device, comprising a housing and a filtration and purification mechanism, the bottom of the housing is provided with a suction port, the suction port is provided with a suction cover, and the A primary filter is arranged in the suction hood, and the filter purification mechanism includes a communication pipeline, a first fan, a filter box, a second fan and a purification box. The communication pipeline is provided with an elbow, and the elbow is provided with a spiral airflow cavity. The invention uses the primary filter to perform primary filtration and purification of the waste gas, removes large particles of impurities in the waste gas, and then absorbs the oil fume in the waste gas through the action of the adsorption cilia on the inner wall of the spiral air flow cavity, and then utilizes the filter components in the filter box to filter and absorb the waste gas The impurities and organic matter in the waste gas, using the purification box to filter and purify the small particles of impurities in the waste gas, realize the filtration and purification process of the waste gas containing soot, which is of great significance to protect the environment and build a green ecological environment.

Description

A waste gas filtration and purification device

technical field

The invention relates to the technical field of air purification equipment, in particular to a filter and purification device for filtering and purifying waste gas containing oil fume.

Background technique

Cooking is an essential part of every family. In order to have a table of delicious food, people often use frying, frying, cooking, and frying... First, install a range hood or a ventilation fan in the kitchen to make the oil fume and exhaust gas Remove from the house in time. When cooking, turn on the range hood or ventilation fan in advance, and turn off the range hood or ventilation fan after 5-10 minutes after cooking, so that unhealthy oil fume can be discharged outside. The exhaust gas in the kitchen is mainly cooking oil and oil fume produced during the heating process of food. During the cooking process, the water foam in the dish vaporizes and expands rapidly, and part of it condenses into mist and oil fumes together to form visible oil fumes. The oil mist is mainly water mist, and only a small amount of oil gas and oil fume that are not infiltrated with the water mist are sandwiched in the upper part. In addition, the oil fume exhaust gas has some irritating taste. From a morphological point of view, soot exhaust gas includes two types of particulate matter and gaseous pollutants. The particle size of particulate matter is small, generally less than 10 μm, and it is divided into two types: solid and liquid, and the viscosity of the liquid is relatively high. Odors are mainly caused by gaseous pollutants.

The waste gas emitted from the kitchen has the smell of coal waste gas and oily smoke. The main components of coal waste gas are carbon monoxide and sulfur dioxide, which are very harmful to the human body. In the kitchen fume exhaust gas, CO, the main component of fuel exhaust gas, will enter the blood through the respiratory tract, and form carboxyhemoglobin after affinity with hemoglobin in the blood, thereby weakening the function of blood to transport oxygen to various tissues. Causes hypoxia in the body, damages the central nervous system, and memory loss. NOx and S0 ₂ are harmful gases to the human body, which will have a strong stimulating effect on the respiratory tract; the main harmful components of the oil fume exhaust gas are butadiene, ethylene acid polymer and benzo(a)pyrene, which will cause cancer to the human body. effect.

Among the existing oil fume purification equipment, such as a kind of oil fume separation device for the oil fume separator disclosed in the Chinese Patent Publication No. CN207412960U, it includes a separation cylinder and a motor for driving the oil fume separation net disk to rotate. For the oil fume separation network disk; the oil fume separation network disk includes a mounting plate in the middle for connecting with the motor, a mounting ring set outside the mounting plate, and a number of guide spokes set between the mounting plate and the mounting ring, each spoke group There are two diversion spokes; one end of the two diversion spokes in the same spoke group intersects with the orthographic projection on the mounting plate, and the other end is arranged at intervals on the installation ring; this device can increase the air intake, thereby reducing oil fume The oil fume separation efficiency of the separation network disk is poor, but due to the poor filtration and purification effect, the continuous working ability is weak.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a filter and purification device for filtering and purifying oily fume exhaust gas, which has a reasonable structure and high purification efficiency. Particle impurities, and then the exhaust gas enters the connecting pipeline. Since there is at least one elbow in the connecting pipeline, and a spiral air flow chamber is arranged on the elbow, when the exhaust gas passes through the elbow, part of the exhaust gas will enter the spiral air flow chamber and pass through the elbow. The adsorption cilia on the inner wall of the spiral airflow cavity, after absorbing the oily fumes in the exhaust gas, then use the filter components in the filter box to filter and absorb impurities and organic substances in the exhaust gas, and use the purification box to filter and purify small particles of impurities in the exhaust gas, so as to realize the exhaust gas containing oil fume The filtration and purification process is of great significance to the protection of environmental safety and the construction of a green ecological environment.

The purpose of the present invention is achieved through the following technical solutions:

An exhaust gas filtering and purifying device, comprising a housing and a filtering and purifying mechanism, the bottom of the housing is provided with a suction port, the suction port is provided with a suction cover, and a primary filter is provided inside the suction cover, so that The filtration and purification mechanism includes a communication pipeline, a first fan, a filter box, a second fan and a purification box, the two ends of the communication pipeline are respectively connected with the suction hood and the filter box, and the communication pipeline is provided with at least one elbow , the elbow is provided with a helical airflow chamber, and the inner wall of the helical airflow chamber is uniformly provided with adsorption cilia, and the adsorption cilia are used to absorb oil fume in the waste gas, and the first fan is provided with a communication pipeline, the first The fan is used to introduce the waste gas in the suction hood into the filter box through the communication pipeline, and the filter box is provided with a filter assembly, and the filter assembly is used to filter and absorb impurities and organic matter in the exhaust gas. The inlet is connected to the filter box pipeline, and the outlet of the second fan is connected to the purification box pipeline. The inlet pipeline port of the second fan and the port of the communication pipeline are respectively arranged on both sides of the filter assembly, and the purification box is used for filtering and purifying For small particles of impurities in the exhaust gas, an air outlet is provided on the top of the housing, and the air outlet communicates with the purification box pipeline.

Further, the primary filter is an inverted cone structure. In actual use, when it is necessary to filter and purify oily fume exhaust gas, the filter purification device is placed in the environment, and then the first fan and the second fan are controlled to start working, and the first fan is used to let the exhaust gas in the environment enter the suction In the gas hood, the exhaust gas is firstly filtered and purified through the primary filter to remove large particles of impurities in the exhaust gas, and then the exhaust gas enters the communication pipeline. Since there is at least one elbow in the communication pipeline, and a spiral is set on the elbow. The air flow chamber, so that when the exhaust gas passes through the elbow, part of the exhaust gas will enter the spiral air flow chamber, and after the adsorption cilia on the inner wall of the spiral air flow chamber, after absorbing the oil fume in the exhaust gas, the exhaust gas will flow back into the connecting pipeline and follow the communication The pipeline enters the filter box, uses the filter assembly in the filter box to filter and absorb impurities and organic matter in the exhaust gas, and then uses the second fan to introduce the exhaust gas filtered and adsorbed by the filter assembly into the purification box, and uses the purification box to filter and purify the exhaust gas. The small particles of impurities are discharged from the air outlet to realize the filtration and purification process of oily fume exhaust gas.

Further, the adsorption cilia are adsorption cilia of photocatalyst material, and a first ultraviolet light unit is arranged in the spiral air flow chamber. By setting the adsorption cilia on the inner wall of the spiral airflow chamber as adsorption cilia of photocatalyst material, and setting the first ultraviolet light unit in the spiral airflow chamber, the first ultraviolet light unit cooperates with the adsorption cilia with photocatalyst function, so that the adsorption cilia not only It can absorb impurities, and can also continuously absorb and decompose organic matter, improving the filtration and purification efficiency and filtration and purification effect of exhaust gas.

Further, the first ultraviolet light unit is connected with a controller.

Further, the filter assembly includes an upper fixed net, a blocking filter net and a lower fixed net, the upper fixed net is arranged above the lower fixed net, and the upper fixed net and the lower fixed net separate the filter box from bottom to top. There are a pre-filter area, a filter area and a post-filter area, the communication pipeline communicates with the pre-filter area, the inlet pipe of the second fan communicates with the post-filter area, and the blocking filter is arranged in the filter area. By connecting the connecting pipeline with the pre-filter area, connecting the inlet pipe of the second fan with the post-filter area, and setting the blocking filter in the filter area, the exhaust gas introduced by the communication line enters the pre-filter at the bottom of the filter box. In the area, the exhaust gas is filtered and purified through the filter assembly from bottom to top, so that the impurities in the exhaust gas are intercepted by the filter assembly and fall to the bottom of the filter box under the action of gravity, reducing the blockage of impurities on the filter assembly, thereby improving the efficiency of the filter assembly. Filtration purification efficiency and filtration purification effect.

Further, the filter includes a first micron filter layer, a first activated carbon filler layer, a heavy metal adsorption filler layer, a second activated carbon filler layer, and a second micron filter layer arranged in sequence from top to bottom.

Further, the post-filtering area is also provided with a micron-level isolation net, and the micron-level isolation net is provided with an inlet pipe port of the second fan for filtering impurities entering the second fan. By setting a micron-level isolation net at the inlet pipe port of the second fan, the waste gas entering the second fan is filtered and intercepted by using the micron-level isolation net, and large particles of impurities are intercepted in the filter box.

Further, the filter box is fixedly connected to the inner wall of the housing, and the side wall of the housing where the filter box is located is provided with an inlet and outlet, and the inlet and outlet pass through the side wall of the filter box to communicate with the filtering area, and the side wall of the housing is also provided with an inlet and outlet. A cleaning box is provided, and the filtering and purifying device also includes a cleaning mechanism, which includes a driving device, a driving rod, a front push plate, a rear push plate, a cleaning liquid pipe and a drain pipe, and the front push plate, the rear push plate The plates are respectively arranged at both ends of the filter screen, and the front push plate is arranged close to the drive device, and the drive device is arranged on the side wall of the cleaning box far away from the inlet and outlet, and the two ends of the drive rod are connected with the drive device and the front push plate respectively. Connected, the driving device is used to control the front push plate to move left and right, the cleaning liquid pipe is arranged on the top of the cleaning box, the cleaning liquid pipe is used to feed cleaning liquid into the cleaning box, and the drain pipe is arranged at the bottom of the cleaning box. In the actual use process, in order to improve the continuous working ability of the filter screen, a cleaning box and a cleaning mechanism are respectively set up, and the driving device of the cleaning mechanism is used to control the front push plate to move left and right. The left and right sides of the filter screen make the front push plate, the rear push plate and the block filter screen form a whole. During the movement of the front push plate, the rear push plate and the filter screen will move synchronously with the front push plate respectively; In the process of filtering and purifying the exhaust gas with the filter, as the working time increases, the more impurities are absorbed by the filter, and as the impurities on the filter increase, it is easy to cause impurities to accumulate and block the filter. Thereby reducing the filter purification efficiency and filter purification effect of the filter screen; and by setting the drive device, the drive device is used to control the front push plate to move to the drive device, so that the filter screen is moved into the cleaning box, and then introduced into the cleaning tank through the cleaning liquid pipe. Use the cleaning liquid to wash the filter screen, clean and remove the impurities accumulated on the filter screen, let the impurities be taken away with the cleaning liquid, and be discharged from the drain pipe; after the filter screen is cleaned, the driving device is controlled to work, Push the block filter back into the filter box to continue to filter and purify the exhaust gas and improve the continuous working ability of the block filter.

Further, the drive device is connected with the controller.

Further, the upper and lower ends of the rear push plate are respectively provided with sliders, and the upper fixed net and the lower fixed net are respectively provided with chute, and the sliders are matched with the chute. By setting sliders at the upper and lower ends of the rear push plate, and setting chutes on the upper fixed net and the lower fixed net respectively, the movement path of the rear push plate is fixed by using the slider and the chute, and the size of the rear push plate is reduced. The contact area with the upper fixed net and the lower fixed net can reduce the friction force of the rear push plate during the movement. Preferably, gaps are left between the blocking screen and the upper fixed net and the lower fixed net respectively.

Further, the upper and lower sides of the filter screen are respectively provided with support net layers, and the two ends of the support net layers are respectively connected with the front push plate and the rear push plate. By setting the supporting mesh layers on the upper and lower sides of the blocking filter, the supporting mesh layer is used to enhance the pressure bearing capacity of the blocking filter, avoiding the damage of the blocking filter during the cleaning process in the cleaning box, and improving the service life of the equipment.

Further, the filter screen freely passes through the inlet and outlet.

Further, a second ultraviolet light unit is provided on the inner wall of the cleaning box, and the surfaces of the activated carbon fillers in the first activated carbon filler layer and the second activated carbon filler layer are loaded with photocatalyst materials. When the blocking filter is pushed into the cleaning box for cleaning, the second ultraviolet light unit is used to cooperate with the photocatalyst activated carbon filler in the first activated carbon packing layer and the second activated carbon packing layer to decompose the adsorbed macromolecular organic matter and regenerate the first The adsorption capacity of the activated carbon filler layer and the second activated carbon filler layer.

Further, the second ultraviolet light unit is connected with a controller.

Further, a plasma air purification unit and a nano-filter are sequentially arranged in the purification box along the direction of air flow.

Further, the plasma air purification unit is connected with a controller.

Further, a control box is also arranged in the housing, and a controller and a power supply are arranged in the control box, and the controller is respectively connected to the first fan, the second fan, and the power supply.

The beneficial effects of the present invention are: the waste gas filtering and purifying device proposed by the present invention uses the primary filter to perform primary filtration and purification of the waste gas to remove large particles of impurities in the waste gas, and then the waste gas enters the connecting pipeline. At least one elbow, and a spiral air flow chamber is set on the elbow, so that when the exhaust gas passes through the elbow, part of the exhaust gas will enter the spiral air flow chamber, and after the adsorption of cilia on the inner wall of the spiral air flow chamber, the oil fume in the exhaust gas will be absorbed. Using the filter components in the filter box to filter and adsorb impurities and organic substances in the exhaust gas, and using the purification box to filter and purify the small particles of impurities in the exhaust gas, to achieve the filtration and purification process of the exhaust gas containing oil fumes, is of great significance for protecting the environment and building a green ecological environment.

Description of drawings

Fig. 1 is the structural representation of filter purification device of the present invention;

Fig. 2 is a sectional view of the filtration and purification device of the present invention;

Fig. 3 is the sectional view of filter case of the present invention;

Fig. 4 is the structural representation of blocking filter net of the present invention;

Fig. 5 is the cross-sectional view of purification box of the present invention;

Fig. 6 is the sectional view of control box of the present invention;

Fig. 7 is the sectional view of elbow of the present invention;

Fig. 8 is the sectional view of basic reaction unit of the present invention;

In the figure, 1-shell, 2-suction hood, 3-primary filter, 4-communication pipeline, 5-first fan, 6-filter box, 7-second fan, 8-cleaning box, 9- Elbow, 10-spiral airflow cavity, 11-adsorption cilia, 12-air outlet, 13-first ultraviolet light unit, 14-upper fixed net, 15-lower fixed net, 16-block filter, 17-first micron Filter layer, 18-first activated carbon packing layer, 19-heavy metal adsorption packing layer, 20-second activated carbon packing layer, 21-second micron filter layer, 22-micron isolation net, 23-cleaning box, 24- Driving device, 25-drive rod, 26-front push plate, 27-rear push plate, 28-slider, 29-support net layer, 30-cleaning liquid pipe, 31-drainage pipe, 32-second ultraviolet light unit , 33-plasma air purification unit, 34-nanometer filter, 35-control box, 36-controller, 37-power supply, 38-electrode tube, 39-electrode wire.

Detailed ways

The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

As shown in Figures 1 to 8, a waste gas filtration and purification device includes a housing 1 and a filtration and purification mechanism, the bottom of the housing 1 is provided with a suction port, and the suction port is provided with a suction cover 2, so A primary filter screen 3 is arranged in the suction hood 2, and the filter purification mechanism includes a communication pipeline 4, a first fan 5, a filter box 6, a second fan 7 and a purification box 8, and the two communication pipelines 4 The ends are connected with the suction hood 2 and the filter box 6 respectively, and the connecting pipeline 4 is provided with at least one elbow 9, and the elbow 9 is provided with a spiral airflow chamber 10, and the inner wall of the spiral airflow chamber 10 is uniformly provided with adsorption The cilia 11, the adsorption cilia 11 is used to absorb oil fumes in the exhaust gas, the first fan 5 is arranged on the communication pipeline 4, and the first fan 5 is used to introduce the exhaust gas in the suction hood 2 through the communication pipeline 4 In the filter box 6, a filter assembly is arranged in the filter box 6, and the filter assembly is used to filter impurities and organic matter in the adsorbed exhaust gas. The inlet of the second fan 7 is connected with the filter box 6, and the second fan 7 The outlet of 7 is in communication with the purification box 8, and the inlet pipe port of the second fan 7 and the port of the communication pipeline 4 are respectively arranged on both sides of the filter assembly, and the purification box 8 is used to filter and purify small particles in the exhaust gas Impurities, the top of the housing 1 is provided with an air outlet 12, and the air outlet 12 communicates with the purification box 8 through pipes.

Specifically, the primary filter 3 is an inverted cone structure. In the actual use process, when it is necessary to filter and purify the exhaust gas containing oily fume, the filter and purification device is placed in the environment, and then the first fan 5 and the second fan 7 are controlled to start working, and the first fan 5 is used to let the air in the environment The exhaust gas enters the suction hood 2, and the exhaust gas is firstly filtered and purified through the primary filter 3 to remove large particles of impurities in the exhaust gas, and then the exhaust gas enters the communication pipeline 4, because the communication pipeline 4 is provided with at least one elbow 9 , and a spiral air flow chamber 10 is set on the elbow 9, so that when the exhaust gas passes through the elbow 9, part of the exhaust gas will enter the spiral air flow chamber 10, and after the action of the adsorption cilia 11 on the inner wall of the spiral air flow chamber 10, the oil fume in the exhaust gas will be absorbed. , the exhaust gas flows back into the communication pipeline 4, and enters the filter box 6 along the communication pipeline 4, and uses the filter assembly installed in the filter box 6 to filter and absorb impurities and organic matter in the exhaust gas, and then uses the second fan 7 to , the exhaust gas filtered and adsorbed by the filter assembly is introduced into the purification box 8, and the small particle impurities in the exhaust gas are filtered and purified by the purification box 8, and then discharged from the air outlet 12, so as to realize the filtration and purification process of the exhaust gas containing soot.

Specifically, the adsorption cilia 11 are adsorption cilia made of photocatalyst material, and the first ultraviolet light unit 13 is arranged in the spiral air flow cavity 10 . By setting the adsorption cilia 11 on the inner wall of the spiral air flow chamber 10 as adsorption cilia of photocatalyst material, and setting the first ultraviolet light unit 13 in the spiral air flow chamber 10, the first ultraviolet light unit 13 and the adsorption cilia 11 with photocatalyst function Cooperating, the adsorption cilia 11 can not only absorb impurities, but also continuously absorb and decompose organic matter, so as to improve the filtration and purification efficiency and filtration and purification effect of exhaust gas.

Specifically, the first ultraviolet light unit 13 is connected with a controller 36 .

Specifically, the filter assembly includes an upper fixed net 14, a filter net 16 and a lower fixed net 15, the upper fixed net 14 is arranged above the lower fixed net 15, and the upper fixed net 14 and the lower fixed net 15 filter the filter box 6 Divided into pre-filter area, filter area and post-filter area arranged sequentially from bottom to top, the communication pipeline 4 communicates with the pre-filter area, the inlet pipe of the second blower fan 7 communicates with the post-filter area, the barrier The filter screen 16 is arranged in the filter area. By setting the communication pipeline 4 to communicate with the pre-filter area, the inlet pipe of the second fan 7 is set to communicate with the filter area, and the filter screen 16 is arranged in the filter area, so that the waste gas introduced by the communication pipeline 4 enters the filter area. In the pre-filter area at the bottom of the filter box 6, the exhaust gas is filtered and purified through the filter assembly from bottom to top, so that the impurities in the exhaust gas are intercepted by the filter assembly and fall to the bottom of the filter box 6 under the action of gravity, reducing the impact of impurities on the filter. Blockage of components, thereby improving the filtration and purification efficiency and filtration and purification effect of filter components.

Specifically, the filter screen 16 includes a first micron filter layer 17, a first activated carbon filler layer 18, a heavy metal adsorption filler layer 19, a second activated carbon filler layer 20, a second micron filter layer, which are arranged in sequence from top to bottom. Layer 21.

Specifically, a micron-level isolation net 22 is also provided in the post-filtration area, and the micron-level isolation net 22 is disposed at the inlet pipe port of the second fan 7 for filtering impurities entering the second fan 7 . By setting the micron-level isolation net 22 at the inlet pipe port of the second fan 7, the exhaust gas entering the second fan 7 is filtered and intercepted by the micron-level isolation net 22, and the large particle impurities are intercepted in the filter box 6.

Specifically, the filter box 6 is fixedly connected to the inner wall of the housing 1. An inlet and outlet are provided on the side wall of the housing 1 where the filter box 6 is located. The inlet and outlet pass through the side wall of the filter box 6 and communicate with the filter area. The housing A cleaning box 23 is also arranged on the outer side wall of the body 1, and the filter purification device also includes a cleaning mechanism, and the cleaning mechanism includes a driving device 24, a driving rod 25, a front push plate 26, a rear push plate 27, and a cleaning liquid pipe 30. and the drain pipe 31, the front push plate 26 and the rear push plate 27 are respectively arranged at the front and rear ends of the filter screen 16, and the front push plate 26 is arranged close to the drive device 24, and the drive device 24 is arranged at a place far away from the inlet and outlet. On the outer wall of the cleaning box 23, the two ends of the drive rod 25 are respectively connected with the drive device 24 and the front push plate 26. The drive device 24 is used to control the front push plate 26 to move left and right, and the cleaning liquid pipe 30 is arranged on the cleaning On the top of the tank 23 , the cleaning liquid pipe 30 is used to feed the cleaning liquid into the cleaning tank 23 , and the drain pipe 31 is arranged at the bottom of the cleaning tank 23 . In the actual use process, in order to improve the continuous working ability of the filter screen 16, a cleaning box 23 and a cleaning mechanism are respectively provided, and the driving device 24 of the cleaning mechanism is used to control the front push plate 26 to move left and right. Plate 27 is respectively arranged on the left and right ends of filter screen 16, so that front push plate 26, rear push plate 27, and filter screen 16 form a whole. 16 will respectively move synchronously with the front push plate 26; and in the process of filtering and purifying the waste gas by using the filter screen 16, as the working time increases, the more impurities will be filtered and adsorbed by the filter screen 16. The increase of impurities on the filter screen 16 will easily cause the accumulation of impurities to block the filter screen 16, thereby reducing the filtration and purification efficiency and filtration and purification effect of the filter screen 16; Move to the driving device 24, so that the filter screen 16 is moved into the cleaning box 23, and then the cleaning liquid is introduced through the cleaning liquid pipe 30, and the filter screen 16 is washed with the cleaning liquid to clean and remove the impurities accumulated on the filter screen 16 , let the impurities be taken away with the cleaning liquid, and discharged from the drain pipe 31; after the filter screen 16 is cleaned, the driving device 24 is controlled to work, and the filter screen 16 is pushed back into the filter box 6 to continue filtering the exhaust gas Purify and improve the continuous working ability of the filter screen 16.

Specifically, the drive device 24 is connected to a controller 36 .

Specifically, the upper and lower ends of the rear push plate 27 are respectively provided with sliders 28, and the upper fixed net 14 and the lower fixed net 15 are respectively provided with chute, and the slider 28 is matched with the chute. By setting slide block 28 respectively at the upper and lower ends of back push plate 27, and respectively setting chute on upper fixed net 14, lower fixed net 15, utilize slide block 28 to cooperate with chute, fix the moving path of back push plate 27 , and reduce the contact area between the rear push plate 27 and the upper fixed net 14 and the lower fixed net 15, thereby reducing the frictional force of the rear push plate 27 during the movement. Preferably, gaps are left between the blocking screen 16 and the upper fixed net 14 and the lower fixed net 15 respectively.

Specifically, the upper and lower sides of the filter screen 16 are respectively provided with a support net layer 29, and the two ends of the support net layer 29 are respectively connected with the front push plate 26 and the rear push plate 27. By being respectively provided with supporting net layer 29 on both sides up and down of filter screen 16, utilize support net layer 29 to strengthen the pressure bearing capacity of block filter screen 16, avoid that block filter screen 16 is damaged in cleaning process in cleaning box 23, improve equipment service life.

Specifically, the filter screen 16 can freely pass through the inlet and outlet.

Specifically, a second ultraviolet light unit 32 is provided on the inner wall of the cleaning box 23, and the surfaces of the activated carbon fillers in the first activated carbon filler layer 18 and the second activated carbon filler layer 20 are loaded with photocatalyst materials. When the filter screen 16 is pushed into the cleaning box 23 for cleaning, the second ultraviolet light unit 32 is utilized to cooperate with the photocatalyst activated carbon filler in the first activated carbon filler layer 18 and the second activated carbon filler layer 20 to decompose the adsorbed macromolecules organic matter, restore the adsorption capacity of the first activated carbon packing layer 18 and the second activated carbon packing layer 20 .

Specifically, the second ultraviolet light unit 32 is connected with a controller 36 .

Specifically, a plasma air purification unit 33 and a nano filter 34 are sequentially arranged in the purification box 8 along the air flow direction. Preferably, the plasma air purification unit 33 includes a plurality of basic reaction units, and the basic reaction units are composed of an electrode wire 39 and an electrode tube 38 , and the electrode tube 38 has the electrode wire 39 as a central axis.

Specifically, the plasma air purification unit 33 is connected with a controller 36 .

Specifically, a control box 35 is also arranged in the housing 1, a controller 36 and a power supply 37 are arranged in the control box 35, and the controller 36 is respectively connected to the first fan 5, the second fan 7, and the power supply 37. .

When in use, the user puts the filter and purification device in an air environment rich in oil fumes and exhaust gas, then controls the first fan 5 and the second fan 7 to start working, and uses the first fan 5 to let the exhaust gas in the environment enter the suction hood 2 Inside, the waste gas is firstly filtered and purified through the primary filter 3 to remove large particles of impurities in the waste gas, and then the waste gas enters the communication pipeline 4. Since the communication pipeline 4 is provided with at least one elbow 9, and the elbow 9 A spiral air flow chamber 10 is arranged on the top, so that when the exhaust gas passes through the elbow 9, part of the exhaust gas will enter the spiral air flow chamber 10, and through the action of the adsorption cilia 11 on the inner wall of the spiral air flow chamber 10, after absorbing the oil fume in the exhaust gas, the exhaust gas will flow back to the communication channel. into the pipeline 4, and enter the filter box 6 along the communication pipeline 4, use the filter assembly in the filter box 6 to filter and absorb impurities and organic matter in the waste gas, and then use the second fan 7 to filter and absorb the waste gas that has passed through the filter assembly. The exhaust gas is introduced into the purification box 8, and the small particle impurities in the exhaust gas are filtered and purified by the purification box 8, and then discharged from the air outlet 12, so as to realize the filtration and purification process of the exhaust gas containing oil fume; in addition, by setting the driving device 24, the driving device 24 is used to control the front The push plate 26 moves to the driving device 24, thereby moving the filter screen 16 into the cleaning box 23, and then introduces the cleaning liquid through the cleaning liquid pipe 30, and flushes the filter screen 16 with the cleaning liquid, and absorbs and accumulates on the filter screen 16. Impurities are cleaned and removed, and the impurities are taken away with the cleaning liquid and discharged from the drain pipe 31; after the filter screen 16 is cleaned, the driving device 24 is controlled to work, and the filter screen 16 is pushed back into the filter box 6 to continue Exhaust gas is filtered and purified to improve the continuous working ability of the filter screen 16 .

The above descriptions are only preferred embodiments of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and Modifications can be made within the scope of the ideas described herein, by virtue of the above teachings or skill or knowledge in the relevant art. However, changes and changes made by those skilled in the art do not depart from the spirit and scope of the present invention, and should all be within the protection scope of the appended claims of the present invention.

Claims (7)

1. A waste gas filtering and purifying device comprises a shell and a filtering and purifying mechanism, wherein an air suction port is arranged at the bottom of the shell, an air suction cover is arranged on the air suction port, and a primary filter screen is arranged in the air suction cover, the filtering and purifying mechanism comprises a communicating pipeline, a first fan, a filter box, a second fan and a purifying box, two ends of the communicating pipeline are respectively communicated with the air suction cover and the filter box, at least one elbow is arranged on the communicating pipeline, a spiral airflow cavity is arranged on the elbow, adsorption cilia are arranged on the inner wall of the spiral airflow cavity and used for adsorbing oil smoke in waste gas, the first fan is arranged on the communicating pipeline, the first fan is used for leading the waste gas in the air suction cover into the filter box through the communicating pipeline, a filter component is arranged in the filter box and used for filtering and adsorbing impurities and organic matters in the waste gas, the inlet of the second fan is communicated with the filter box pipeline, the outlet of the second fan is communicated with the purifying box pipeline, the inlet pipeline port of the second fan and the port of the communicating pipeline are respectively arranged at two sides of the filtering component, the purifying box is used for filtering and purifying small particle impurities in waste gas, and the top of the shell is provided with an air outlet.

2. The exhaust gas filtering and purifying device as claimed in claim 1, wherein the primary filter screen has an inverted conical cylinder structure.

3. The exhaust gas filtering and purifying device according to claim 1, wherein the adsorbing cilia are made of photocatalyst, and a first ultraviolet light unit is disposed in the spiral airflow chamber.

4. The exhaust gas filtering and purifying device as claimed in claim 1, wherein the filtering assembly includes an upper fixing net, a blocking filter net and a lower fixing net, the upper fixing net is disposed above the lower fixing net, the upper fixing net and the lower fixing net divide the filtering box into a pre-filtering area, a filtering area and a post-filtering area which are sequentially disposed from bottom to top, the communication pipeline is communicated with the pre-filtering area, the inlet pipeline of the second fan is communicated with the post-filtering area, and the blocking filter net is disposed in the filtering area.

5. The exhaust gas filtering and purifying device according to claim 4, wherein the blocking filter screen comprises a first micron filter screen layer, a first activated carbon filler layer, a heavy metal adsorption filler layer, a second activated carbon filler layer and a second micron filter screen layer which are sequentially arranged from top to bottom.

6. The exhaust gas filtering and purifying device as claimed in claim 4, wherein a micron-sized separation net is further disposed in the post-filtering region, and the micron-sized separation net is provided with an inlet pipeline port of the second fan and is used for filtering impurities entering the second fan.

7. The exhaust gas filtering and purifying device as claimed in claim 1, wherein a control box is further disposed in the housing, a controller and a power supply are disposed in the control box, and the controller is respectively connected to the first fan, the second fan and the power supply.