CN111888933A - Experiment fume hood clean system based on photocatalysis - Google Patents
Experiment fume hood clean system based on photocatalysis Download PDFInfo
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- CN111888933A CN111888933A CN202010671909.5A CN202010671909A CN111888933A CN 111888933 A CN111888933 A CN 111888933A CN 202010671909 A CN202010671909 A CN 202010671909A CN 111888933 A CN111888933 A CN 111888933A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/88—Handling or mounting catalysts
- B01D53/885—Devices in general for catalytic purification of waste gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/80—Type of catalytic reaction
- B01D2255/802—Photocatalytic
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- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
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- Health & Medical Sciences (AREA)
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- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention discloses an experimental fume hood purification system based on photocatalysis, which comprises a box body, an air inlet pipe arranged at the bottom of the box body, an air outlet arranged at the top of the box body and a photocatalysis layer arranged in the box body, wherein the air inlet pipe is arranged at the bottom of the box body; the inside of the box body is also provided with a first adsorption layer positioned below the photocatalytic layer and a second adsorption layer positioned above the photocatalytic layer. The air inlet pipe is divided into an inner pipe and an outer pipe, and the cover plate arranged on the inner pipe can prevent waste gas from dripping into an operation table or a sample after being condensed to form liquid drops; the photocatalytic plates are longitudinally and transversely arranged and are wavy, so that the area can be increased, and the treatment efficiency is improved; the safety is higher, when the circumstances such as outage suddenly, can prevent that untreated waste gas from escaping the polluted environment through intake pipe, blast pipe.
Description
Technical Field
The invention belongs to the technical field of waste gas treatment, and particularly relates to an experiment fume hood purification system based on photocatalysis.
Background
Laboratory experiments are typically performed in a fume hood. Because of different raw materials and various reaction types used in experiments, tail gas with complex components, such as acid gas and the like, is often generated in the experimental process, and if the tail gas is not treated or not treated properly, the tail gas not only can cause harm to the physical health of experimenters, but also can pollute the environment.
The fume hood that uses conventionally can cool gradually and condense into the liquid droplet at tail gas entering pipeline back part fog, then from the intraductal drippage of draft to the operation panel, not only can damage the operation panel, but also can pollute the sample of handling, influence experimental data. In addition, in the implementation process, if the power is cut off suddenly, although the experiment is stopped, the waste gas still escapes from the air inlet pipe and the air outlet, so that the environmental pollution is caused, and the health of personnel is influenced. In the prior art, the photocatalyst and the lamp tube are used for waste gas treatment, but the treatment effect is not obvious because the photocatalytic area is small.
Disclosure of Invention
The invention provides a photocatalytic-based experimental fume hood purification system to solve the problems.
In order to solve the technical problems, the invention adopts the following technical scheme:
an experiment fume hood purification system based on photocatalysis comprises a box body, an air inlet pipe arranged at the bottom of the box body, an air outlet with a valve arranged at the top of the box body and a photocatalysis layer arranged in the box body; the photocatalytic layer comprises a first photocatalytic plate arranged longitudinally and a first lamp tube arranged on the inner side of the box body; a fixed column is also arranged in the photocatalytic layer, and a second lamp tube is arranged on the fixed column; the top and the bottom of the photocatalytic layer are of net structures; the substrate of the photocatalytic plate comprises a graphene layer, a catalyst layer arranged on the surface of the graphene layer and a bonding layer positioned between the graphene layer and the catalyst layer; the box body is also internally provided with a first adsorption layer positioned below the photocatalytic layer and a second adsorption layer positioned above the photocatalytic layer. The photocatalytic plate uses graphene, so that the advantages of good toughness and light transmittance of the photocatalytic plate are fully utilized to improve the treatment effect; the device is provided with a first adsorption layer, a photocatalytic layer and a second adsorption layer which can adsorb and decompose harmful ingredients in the waste gas. The first adsorption layer and the second adsorption layer may use an activated carbon layer.
Further, the air inlet pipe comprises an inner pipe and an outer pipe connected with the inner pipe through a partition plate; an inclined groove is formed among the inner pipe, the partition plate and the outer pipe; the inner tube coats and is stamped the apron, be provided with the shrinkage pool in the inner tube. The grooves can recover the condensed liquid drops of the waste gas, and the cover plate can prevent the waste gas from flowing back.
Furthermore, the edge of the cover plate is provided with an elastic bulge, and when the cover plate covers the inner pipe, the elastic bulge extends into the concave hole and is mutually occluded. When the apron covers the inner tube, the elastic bulge that sets up on the apron interlocks each other with the shrinkage pool on the inner tube, has improved the sealed effect that covers, avoids waste gas to pass through.
Furthermore, the inner tube is also provided with a pore channel, the bottom of the pore channel is provided with a spring, the other end of the spring is provided with a magnetic body, the magnetic body is connected with the cover plate through a rope, and the magnetic body is in an I shape with two large ends and a small middle part; and the top of the pore passage is provided with a stop block. An electromagnet is arranged in the cover plate and can attract the magnetic body arranged in the pore passage when being electrified.
Furthermore, the first photocatalytic plate is wavy, holes are formed in the first photocatalytic plate, and the holes gradually decrease from the center of the photocatalytic plate to two sides; the photocatalytic layer further comprises a second photocatalytic plate parallel to the horizontal plane, the second photocatalytic plate is wavy, and holes are formed in the second photocatalytic plate. The photocatalytic layer is provided with a longitudinal first photocatalytic plate and a transverse second photocatalytic plate, the photocatalytic layers are all wave-shaped, holes are formed in the upper surfaces of the first photocatalytic plate and the second photocatalytic plate, the area of the photocatalytic plates can be increased, the contact area of waste gas is increased, and the holes in the photocatalytic plates can facilitate the passing of the waste gas.
Furthermore, a guide plate is further arranged in the box body, one end of the guide plate is connected with the top of the first adsorption layer, the other end of the guide plate is connected with the bottom of the photocatalytic layer, and a wave-shaped bottom plate is arranged in the area of the guide plate surrounding the bottom of the photocatalytic layer. The guide plate can guide gas to enter the photocatalytic layer, and the wavy bottom plate can enlarge the contact area and improve the efficiency of waste gas entering the photocatalytic layer.
Furthermore, a controller (16) is arranged on the outer side of the box body (2), the controller (16) is connected with the valve (9) through a circuit, and the controller (16) is connected with the electromagnet (151) through a circuit; the controller (16) is connected with the first lamp tube (6) and the second lamp tube (11) in the box body (2) through lines. The controller can control the closing of the valve, the electrification of the electromagnet and the switching of the lamp tube when needed, and the operation is convenient.
The invention has the beneficial effects that: 1. the air inlet pipe is divided into an inner pipe and an outer pipe, the cover plate is arranged on the inner pipe, when the cover plate is communicated with the electromagnet through the controller, the electromagnet generates magnetism and can suck a magnetic body, waste gas conveniently enters the box body, and a groove formed by the inner pipe and the outer pipe can contain liquid generated when the waste gas is condensed; 2. the photocatalytic plates are respectively arranged longitudinally and transversely and are all wave-shaped, so that the area can be increased, the contact surface of the waste gas and the photocatalyst is enlarged, and the treatment efficiency is improved; 3. the safety is realized, when the purification system works, if the power is cut off suddenly, the electromagnet in the cover plate loses magnetism, the magnetic body falls down, then the cover plate covers the inner pipe, and meanwhile, the valve of the exhaust port is an electromagnetic valve and is closed after the power is cut off, so that untreated waste gas is prevented from escaping from the environment through the air inlet pipe and the exhaust pipe.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a schematic longitudinal sectional view of the intake pipe.
FIG. 3 is a schematic diagram of a structure of a photocatalyst plate.
Reference numerals: 1-air inlet pipe, 101-clapboard, 102-inner pipe, 103-outer pipe, 104-pore channel, 105-spring, 106-magnetic body, 107-blocking block, 108-concave hole, 109-rope, 2-box, 3-first adsorption layer, 4-guide plate, 5-photocatalytic layer, 6-first lamp tube, 7-second adsorption layer, 8-air outlet, 9-valve, 10-fixed column, 11-second lamp tube, 12-first photocatalytic plate, 121-catalyst layer, 122-bonding layer, 123-graphene layer, 13-second photocatalytic plate, 14-bottom plate, 15-cover plate, 151-electromagnet, 152-bulge and 16-controller.
Detailed Description
In order to facilitate a better understanding of the invention, reference is made to the following examples, which are set forth to illustrate, but are not to be construed as the limit of the invention.
Examples
As shown in fig. 1, an experimental fume hood purification system based on photocatalysis comprises a box body 2, an air inlet pipe 1 arranged at the bottom of the box body 2, an air outlet 8 arranged at the top of the box body and provided with a valve 9, and a photocatalysis layer 5 arranged in the box body; the photocatalytic layer 5 comprises a first photocatalytic plate 12 and a first lamp tube 6 arranged on the inner side of the box body 2; the top and the bottom of the photocatalytic layer 5 are of a net structure; the substrate of the first photocatalytic plate 12 is a graphene layer 123, a catalyst layer 121 disposed on the surface of the graphene layer 123, and an adhesive layer 122 disposed between the graphene layer 123 and the catalyst layer 121; the inside of the box body 2 is also provided with a first adsorption layer 3 positioned below the photocatalytic layer 5 and a second adsorption layer 7 positioned above the photocatalytic layer 5.
In addition, as can be seen from fig. 1, a controller 16 is arranged outside the box body 2, the controller 16 is connected with the valve 9 through a line, and the controller 16 is connected with the electromagnet 151 through a line; the controller 16 is connected to the first lamp 6 and the second lamp 11 in the cabinet 2 through wires.
A guide plate 4 is further arranged in the box body 2, one end of the guide plate 4 is connected with the top of the first adsorption layer 3, and the other end of the guide plate 4 is connected with the bottom of the photocatalytic layer 5. The area of the deflector 4 around the bottom of the photocatalytic layer 5 is provided as a waved bottom plate 14.
As shown in fig. 2, the intake pipe 1 includes an inner pipe 102, an outer pipe 103 connected to the inner pipe 102 through a baffle 101; inclined grooves are formed among the inner pipe 102, the partition plate 101 and the outer pipe 103; the inner tube 102 is covered with a cover plate 15, and a concave hole 108 is arranged in the inner tube 102.
The edge of the cover plate 15 is provided with a resilient projection 152, and when the cover plate 15 is placed over the inner tube 102, the resilient projection 152 extends into the recess 108 and engages with each other.
The inner tube 102 is further provided with an orifice 104, the bottom of the orifice 104 is provided with a spring 105, the other end of the spring 105 is provided with a magnetic body 106, and the magnetic body 106 is connected with the cover plate 15 through a rope; a stop block 107 is provided on top of the tunnel 104. An electromagnet 151 is provided in the cover 15, and the electromagnet 151 can attract the magnetic body 106 provided in the duct 104 when energized.
As shown in fig. 3, the first photocatalytic plate 12 has a wave shape, and the first photocatalytic plate 12 is provided with holes 124, wherein the holes 124 gradually decrease from the center of the photocatalytic plate 12 to both sides.
The photocatalytic layer 5 further comprises a second photocatalytic plate 13 parallel to the horizontal plane, the second photocatalytic plate 13 is wave-shaped, and holes are formed in the second photocatalytic plate 13.
The use principle is as follows: the cover plate in the air inlet pipe can prevent the backflow of the waste gas, and the grooves can accommodate liquid drops in the waste gas; the first adsorption layer can adsorb harmful substances in partial waste gas, and the photocatalytic layer decomposes the harmful substances through the catalyst under the action of light, and then the harmful substances are discharged after being treated by the second adsorption layer. The using method comprises the following steps: the electromagnet is controlled to be electrified by the controller, the formed magnetic field can adsorb the magnetic body and draw the magnetic body to move upwards, and therefore the cover plate is opened to enable waste gas to enter the box body through the air inlet pipe; the waste gas entering the box body firstly passes through the first adsorption layer to remove colored and odorous gases, and then enters the photocatalytic layer from the bottom plate through the guide direction of the guide plate; the lamp tubes on the inner side of the box body and the fixed columns are opened, the formed light decomposes the waste gas under the action of the photocatalyst, and the contact area between the waste gas and the photocatalytic plate can be increased due to the fact that the photocatalytic plates arranged longitudinally and transversely are wavy, and therefore the catalytic effect is improved; the waste gas continues to upwards enter the second adsorption layer through the photocatalytic layer, the untreated harmful substances are further adsorbed, and finally the valve is opened, so that the treated waste gas flows out of the exhaust pipe.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An experiment fume hood purification system based on photocatalysis is characterized by comprising a box body (2), an air inlet pipe (1) arranged at the bottom of the box body (2), an air outlet (8) arranged at the top of the box body and provided with a valve (9), and a photocatalysis layer (5) arranged in the box body; the photocatalytic layer (5) comprises a first photocatalytic plate (12) and a first lamp tube (6) arranged on the inner side of the box body (2); the top and the bottom of the photocatalytic layer (5) are of a net structure; the substrate of the first photocatalytic plate (12) is a graphene layer (123), a catalyst layer (121) arranged on the surface of the graphene layer (123), and an adhesive layer (122) positioned between the graphene layer (123) and the catalyst layer (121); the box body (2) is also internally provided with a first adsorption layer (3) positioned below the photocatalytic layer (5) and a second adsorption layer (7) positioned above the photocatalytic layer (5).
2. A photocatalytic based laboratory fume hood purification system according to claim 1, characterized by the fact that the inlet duct (1) comprises an inner duct (102), an outer duct (103) connected to the inner duct (102) by a baffle (101); inclined grooves are formed among the inner pipe (102), the partition plate (101) and the outer pipe (103); the inner tube (102) is covered with a cover plate (15), and a concave hole (108) is formed in the inner tube (102).
3. A photocatalytic based laboratory fume hood purification system according to claim 2, characterized in that the edge of the cover plate (15) is provided with resilient protrusions (152), which resilient protrusions (152) protrude into the recesses (108) and engage each other when the cover plate (15) is applied on the inner tube (102).
4. A photocatalytic-based laboratory fume hood purification system according to claim 2, characterized in that the inner tube (102) is further provided with a duct (104), the bottom of the duct (104) is provided with a spring (105), the other end of the spring (105) is provided with a magnetic body (106), and the magnetic body (106) is connected with the cover plate (15) through a rope (109); the top of the pore canal (104) is provided with a stop block (107).
5. A photocatalytic based laboratory fume hood purification system according to claim 4, characterized in that an electromagnet (151) is arranged in the cover plate (15), and when energized, the electromagnet (151) can attract the magnetic body (106) arranged in the duct (104).
6. A photocatalytic based laboratory fume hood purification system according to claim 1, characterized in that the first photocatalytic plate (12) is wave-shaped, and the first photocatalytic plate (12) is provided with holes (124), and the holes (124) gradually decrease from the center of the photocatalytic plate (12) to two sides.
7. A photocatalytic based laboratory fume hood purification system according to claim 1, characterized in that the photocatalytic layer (5) further comprises a second photocatalytic plate (13) parallel to the horizontal plane, the second photocatalytic plate (13) is wave-shaped, and the second photocatalytic plate (13) is perforated.
8. A photocatalytic based laboratory fume hood purification system according to claim 1, wherein a flow guide plate (4) is further disposed in the box body (2), one end of the flow guide plate (4) is connected to the top of the first adsorption layer (3), and the other end of the flow guide plate (4) is connected to the bottom of the photocatalytic layer (5).
9. A photocatalytic based laboratory fume hood purification system according to claim 8, characterized in that the area of the deflector (4) around the bottom of the photocatalytic layer (5) is provided as a waved floor (14).
10. A photocatalytic based laboratory fume hood purification system according to claim 1, characterized in that a controller (16) is arranged outside the box body (2), the controller (16) is connected with the valve (9) through a line, and the controller (16) is connected with the electromagnet (151) through a line; the controller (16) is connected with the first lamp tube (6) and the second lamp tube (11) in the box body (2) through lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010671909.5A CN111888933A (en) | 2020-07-14 | 2020-07-14 | Experiment fume hood clean system based on photocatalysis |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010671909.5A CN111888933A (en) | 2020-07-14 | 2020-07-14 | Experiment fume hood clean system based on photocatalysis |
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| CN111888933A true CN111888933A (en) | 2020-11-06 |
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