CN113769576A - Photocatalyst and photolysis combined type oil smoke purification and collection hood - Google Patents

Photocatalyst and photolysis combined type oil smoke purification and collection hood Download PDF

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Publication number
CN113769576A
CN113769576A CN202111086262.0A CN202111086262A CN113769576A CN 113769576 A CN113769576 A CN 113769576A CN 202111086262 A CN202111086262 A CN 202111086262A CN 113769576 A CN113769576 A CN 113769576A
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purification
photocatalyst
composite
purification chamber
guide plate
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张景齐
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Beijing Guangda Honglang Liantuo Science And Technology Co ltd
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Beijing Guangda Honglang Liantuo Science And Technology Co ltd
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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
    • B01D53/8678—Removing components of undefined structure
    • B01D53/8687—Organic components
    • 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
    • B01D53/007—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 irradiation
    • 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
    • B01D53/38—Removing components of undefined structure
    • B01D53/44—Organic components
    • 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
    • B01D53/76—Gas phase processes, e.g. by using aerosols
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • F24C15/2035—Arrangement or mounting of filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/10—Oxidants
    • B01D2251/104—Ozone
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
    • B01D2259/804—UV light

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biomedical Technology (AREA)
  • Dispersion Chemistry (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

The invention relates to a photocatalyst and photolysis combined type oil smoke purification smoke collection hood, which relates to the field of environmental protection equipment and comprises a composite purification chamber and a smoke collection box, wherein the composite purification chamber is provided with a purification chamber inlet and at least one purification chamber outlet, a light blocking guide plate is arranged in the purification chamber inlet, the smoke collection box is fixedly connected with the composite purification chamber and is communicated with the at least one purification chamber outlet, the smoke collection box is provided with a total air outlet, at least one ultraviolet amalgam lamp is fixed in the composite purification chamber, photocatalyst layers are respectively fixed on the inner wall of the composite purification chamber and the inner side of the light blocking guide plate, and the irradiation area of the at least one ultraviolet amalgam lamp covers all the photocatalyst layers. The invention has the beneficial effects that: the composite purification device has the advantages of small volume, easy installation, balanced air pressure in the composite purification chamber, balanced and stable purification treatment capacity, high purification efficiency, and double purification effects of photolysis and photocatalyst catalytic oxidation in the composite purification chamber, and can realize the long-term qualified emission of oil smoke.

Description

Photocatalyst and photolysis combined type oil smoke purification and collection hood
Technical Field
The invention relates to the field of environment-friendly equipment, in particular to a photocatalyst and photolysis combined type oil fume purification and collection hood.
Background
The highest allowable emission concentration of oil smoke, particulate matters and non-methane total hydrocarbons is required in the emission Standard of atmospheric pollutants for catering industry (DB11/1488-2018) in Beijing City, and the oil smoke content is mainly required<1.0mg/m3Particles of<5.0mg/m3Non-methane total hydrocarbons<10mg/m3. No one is available for ensuring practically continuous emission standards in terms of current technology and equipment, and the 10mg/m is difficult to realize especially for non-methane total hydrocarbons3Because there is no real technical support for effective implementation.
The prior art generally uses:
1. the wet purification technology, namely, water is used as an intermediate medium to clean the discharged oil smoke. This method has proven to be ineffective in treating non-methane total hydrocarbons. Although some people add so-called photolysis to the discharge end of the pipeline, the generation of a dummy due to the fact that wind speed, energy and the like do not meet the governing requirements proves to be ineffective in practice.
2. The electrostatic adsorption and photolysis composite treatment also has the problems of too high light speed of the pipeline, insufficient energy of a light source and the like, and can not treat non-methane total hydrocarbon items except certain effect on particles.
3. The photolysis purification technology decomposes the oil smoke gas by using 185-254nm ultraviolet light, which is theoretically effective for treating non-methane total hydrocarbon, but can only produce effect under certain conditions. The current photolysis technology application is basically not necessary.
The prior art has the following disadvantages:
1. the comprehensive application of the technology is not enough, and the singleness is strong.
If an equipment is called as 'electrostatic photolysis composite type oil fume purification equipment'. Although called "compounding", there is virtually no compounding effect. Furthermore, only a single method is used: electrostatic, mechanical (filtration or high speed centrifugation), wet (water transport or impinging stream), or photolytic. The single method can not realize standard emission of the oil smoke. The fundamental reason is that the technicians in the field only consider the theory of oil smoke purification in the design process, but cannot think the influence of the practical application situation on the purification, and the installation position of the equipment is on a pipeline with very high exhaust gas wind speed, so the treatment efficiency is low, and the photolysis light source cannot play a role. The composite purifying chamber is simply increased in size to form a reducing pipeline with smaller diameters at an inlet and an outlet, only the wind speed can be reduced, but the efficiency of sucking the oil smoke cannot be guaranteed, and the composite purifying chamber is suitable for the middle part of a smoke exhaust pipeline and cannot be applied to a smoke collecting hood at the smoke inlet of the smoke exhaust pipeline.
2. Without regard to abatement environmental requirements and costs.
The application and popularization of any technology must consider the practical application environment and cost. Such as: in the treatment of non-methane total hydrocarbons, two extreme treatment regimes occur, as the photolysis technology theory is only known to be effective and then no matter the conditions of use:
the method has the advantages that only a few lamp tubes are added, and the non-methane total hydrocarbon can be treated. The method has no effect and causes waste.
The medicine is good and various. The large-sized body is made, a large number of ultraviolet lamps are arranged in the large-sized body, the inner space cannot be filled with the ultraviolet lamps, a large amount of energy consumption is caused by the phenomenon, the treatment cost is too high to popularize, and the large-sized body cannot be installed in an oil smoke treatment environment.
Disclosure of Invention
The invention aims to solve the technical problem of how to realize oil fume purification. The method is mainly used for realizing high-quality treatment of kitchen oil fume, can continuously realize standard emission for realizing multiple indexes such as oil fume content, particulate matters, non-methane total hydrocarbon and the like, and can also be used for treating other similar pollutants.
The technical scheme for solving the technical problems is as follows: the utility model provides a photocatalyst and photodissociation combined type oil smoke purification collection petticoat pipe, includes composite purification room and smoke collection box, composite purification room has clean room import and at least one clean room export, install in the clean room import and hinder light guide plate, smoke collection box with composite purification room fixed connection and with at least one the clean room exports the intercommunication, smoke collection box has total air outlet.
The invention has the beneficial effects that: the oil smoke enters the composite purifying chamber through the purifying chamber inlet with larger area, so in the photocatalyst and photolysis composite oil smoke purifying and collecting hood, the speed of the oil smoke entering the collecting hood is the slowest, and the oil smoke entering the composite purifying chamber has enough purifying time through the wind pressure balance effect of the light blocking guide plate on the passing oil smoke, so that the purifying rate is very high. The light-blocking guide plate mainly plays the roles of enabling air flow to be uniform, blocking ultraviolet light from leaking and blocking solid and liquid components in oil smoke.
Gaseous state composition in the oil smoke gets into compound clean room and purifies, and the gas after the purification gets into the smoke collecting box that the inner chamber is great by the clean room export in, and the gas is under the wind pressure effect that the fan produced in the smoke exhaust pipe in the smoke collecting box, discharges the collection petticoat pipe through total air outlet to discharge into the atmosphere through the smoke exhaust pipe. The smoke collection box is mainly used for discharging gas in the composite purification chamber in a balanced manner. The composite purification chamber is prevented from being directly connected to the smoke exhaust pipeline with the smaller diameter, so that the flow speed of the outlet of the purification chamber is too high, and the air in the composite purification chamber does not have enough time to be purified. The air pressure in the compound purifying chamber is balanced after the smoke collecting box is arranged, the gas flow velocity is stable, the purifying efficiency is improved, and the long-term qualified emission of oil smoke can be realized.
The design of at least one purifying chamber outlet is to balance the discharge speed and discharge capacity of oil smoke gas in the composite purifying chamber, so that the purifying treatment capacity of each area in the composite purifying chamber is balanced and stable. The quantity that can export through increasing the clean room increases the discharge capacity of oil smoke, perhaps adjusts the position that the clean room export set up, makes the even, inside flue gas volume of handling everywhere of compound clean room air-out balanced. Therefore, the oil smoke flow rate at the light blocking guide plate of the smoke collecting hood is reduced, the air pressure is balanced, sufficient purification time is met, meanwhile, the discharge capacity of the composite purification chamber is sufficient, and the normal oil smoke suction effect can be met.
Moreover, the purifying chamber outlet of the composite purifying chamber is provided with the smoke collecting box, and the sound wave generated by the airflow is reflected in the smoke collecting box by utilizing the cavity with larger sectional area in the smoke collecting box, so that the noise generated by the fan in the smoke exhaust pipeline can be effectively reduced.
The composite purifying chamber is arranged in the smoke collecting hood, does not occupy other space, solves the problem that the oil smoke purifier with overlarge shape has no space installation in practice, and has a compact structure to facilitate the implementation of the installation, debugging, maintenance and other work under the restriction conditions of kitchens, buildings and the like.
On the basis of the technical scheme, the invention can be further improved as follows.
Furthermore, at least one ultraviolet amalgam lamp is fixed in the composite purification chamber, photocatalyst layers are fixed on the inner wall of the composite purification chamber and the inner side of the light blocking guide plate, and the irradiation area of at least one ultraviolet amalgam lamp covers all the photocatalyst layers.
The beneficial effect of adopting the further scheme is that: the ultraviolet amalgam lamp realizes the ultraviolet photolysis purification of the oil smoke: the ultraviolet amalgam lamp generates 185-254nm ultraviolet light and ozone, and the 185-254nm ultraviolet light cuts off carbon chains among organic compounds in the lampblack, so that carbon, hydrogen and oxygen are subjected to oxidation reaction under the action of the ozone to generate CO2And H2And O, so that the non-methane total hydrocarbons in the oil smoke are degraded into harmless small molecular substances.
The photocatalyst layer realizes the photocatalytic oxidation purification of the oil smoke: the principle of photocatalyst purification is that under the irradiation of ultraviolet light, the photocatalyst generates strong oxidizing substances (hydroxyl radicals, oxygen and the like) which can decompose organic compounds. The photocatalyst has strong oxidizing property after absorbing ultraviolet light emitted by the ultraviolet amalgam lamp, and can effectively decompose non-methane total hydrocarbon components in oil fume gaseous substances to degrade the components into harmless micromolecule CO2And H2And O. The photocatalyst has a sustained action (permanence) characteristic. Therefore, the photocatalyst layer is laid on the inner wall (back plate, top plate and inner plate surface of light-blocking guide plate) of the composite purifying chamber, which is an effective method for purifying non-methane total hydrocarbon in the oil fume. The photocatalyst layer is laid by installing and fixing a photocatalyst plate and a photocatalyst film or covering a photocatalyst coating on the inner wall surface of the composite purification chamber.
The gaseous components in the oil smoke are purified to generate H through the double purification effects of photolysis reaction and photocatalyst catalytic oxidation in the composite purification chamber2O and CO2And the like, and harmless small molecular substances. Under the action of wind pressure, the smoke is discharged from the outlet of the purifying chamber to a smoke discharge pipeline through a smoke collection box. The treatment aiming at non-methane total hydrocarbon can be realized by both photolysis purification and photocatalyst catalytic oxidation reaction.
Further, still include lamp body fixed subassembly, the ultraviolet amalgam lamp passes through lamp body fixed subassembly is fixed in the inner wall of compound clean room.
The beneficial effect of adopting the further scheme is that: the ultraviolet amalgam lamp is fixed in the middle of the composite purifying chamber through the lamp body fixing component and is spaced from the side wall at a certain distance, so that the ultraviolet amalgam lamp can irradiate all photocatalyst layers within the length range of the lamp tube, the using amount of the ultraviolet amalgam lamp can be reduced, the energy is saved, the purifying effect is increased, the using cost is reduced, the energy consumption is reduced (the using amount of the ultraviolet amalgam lamp is reduced, the ozone generation amount is reduced), and the treatment effect is improved. In addition, the ultraviolet amalgam lamp has smaller distance from the photocatalyst, so that the capability of generating light-induced holes on the surface of the photocatalyst is easier to excite, and OH on the surface of the photocatalyst is enabled to be-And H2O molecules are oxidized into hydroxyl radicals to generate a photocatalyst catalytic oxidation reaction, so that non-methane total hydrocarbons are decomposed.
Further, the number of the ultraviolet amalgam lamps is at least two, and at least two ultraviolet amalgam lamps are fixed on the top wall and/or the side wall of the composite purification chamber.
Furthermore, a guide plate upper rail and a guide plate lower rail are fixed on two opposite sides of the purification chamber inlet, and the light-blocking guide plate is slidably mounted between the guide plate upper rail and the guide plate lower rail.
The beneficial effect of adopting the further scheme is that: the light-blocking guide plate is slidably arranged in the track, so that the light-blocking guide plate is convenient to replace, or the light-blocking guide plate is detached to maintain the interior of the composite purification chamber.
The oil recovery device is fixed below the lower guide plate rail, the lower guide plate rail is provided with an oil outlet, and the oil outlet is communicated with the oil recovery device.
The beneficial effect of adopting the further scheme is that: the light-blocking guide plate intercepts solid-liquid and liquid components in the oil smoke, so that the oil smoke components entering the composite purifying chamber are only in a gas state, and the intercepted solid-liquid components of the oil smoke enter the residual oil recoverer through a residual oil port of the lower rail of the guide plate.
Furthermore, the bottom of the residual oil recoverer is closed to form an oil collecting groove, and the oil collecting groove is connected with a residual oil discharge pipe.
The beneficial effect of adopting the further scheme is that: the solid and liquid components in the residual oil recoverer are collected to the bottom residual oil recoverer, and finally collected in a residual oil recovery barrel communicated with the outside through a residual oil discharge pipe.
Furthermore, the number of the light-blocking guide plates is at least two, and the at least two light-blocking guide plates are arranged side by side.
The beneficial effect of adopting the further scheme is that: the light-blocking guide plate is divided into a plurality of parts, on one hand, the light-blocking guide plate with small area is more convenient to transport and manufacture, on the other hand, when the composite purifying chamber is maintained, the next light-blocking guide plate can be only detached, and the operation is convenient.
Further, compound clean room includes roof, backplate, air inlet plate and end plate, the backplate the roof with the air inlet plate connects gradually, just the air inlet plate with the backplate is connected and is formed the cylindric clean room main part, the end plate is two, two the end plate seals respectively the both ends of clean room main part, the roof has at least one the clean room export, the air inlet plate has the clean room import.
The beneficial effect of adopting the further scheme is that: the purifying chamber main body adopts a cylindrical structure, the ultraviolet amalgam lamp and the photocatalyst layer have compact structure and high space utilization rate.
Further, a smoke collecting shell is fixed on the outer side of the inlet of the purifying chamber; the area of the purge chamber inlet is greater than the total area of at least one of the purge chamber outlets.
The beneficial effect of adopting the further scheme is that: the smoke collecting shell collects the oil smoke to the inlet of the purifying chamber, and the suction effect of the oil smoke is improved. The area of the inlet of the purifying chamber is larger, so that the wind speed at the inlet of the purifying chamber is reduced, and the gas has enough purifying time after entering the composite purifying chamber.
Drawings
FIG. 1 is a three-dimensional view of a photocatalyst and photolysis combined type fume purification and collection hood of the present invention;
FIG. 2 is a cross-sectional view of the composite purifying chamber of the photocatalyst and photolysis composite type fume purifying and collecting hood of the present invention;
FIG. 3 is a schematic view of the internal structure of the composite purifying chamber of the photocatalyst and photolysis composite type fume purifying and collecting hood of the present invention;
fig. 4 is a cross-sectional view of the photocatalyst and photolysis combined type fume purification and collection hood of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the composite purifying chamber comprises a composite purifying chamber body, 101, a purifying chamber outlet, 102, a top plate, 103, a back plate, 104, an air inlet plate, 2, a smoke collecting box, 201, a total air outlet, 3, a light-blocking guide plate, 301, a light-blocking guide plate inner plate surface, 302, a light-blocking guide plate outer plate surface, 4, an ultraviolet amalgam lamp, 5, a photocatalyst layer, 6, a lamp body fixing component, 7, a guide plate upper rail, 8, a guide plate lower rail, 9, a residual oil recoverer, 10, an oil collecting tank, 11, a residual oil discharge pipe, 12, a smoke collecting shell, 13 and a residual oil port.
Detailed Description
The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
As shown in fig. 1-4, the present invention provides a photocatalyst and photolysis combined type lampblack purification smoke collection hood, which comprises a composite purification chamber 1 and a smoke collection box 2, wherein the composite purification chamber 1 has a purification chamber inlet and at least one purification chamber outlet 101, a light blocking guide plate 3 is installed in the purification chamber inlet, the smoke collection box 2 is fixedly connected with the composite purification chamber 1 and is communicated with at least one purification chamber outlet 101, and the smoke collection box 2 has a total air outlet 201.
The oil smoke enters the composite purifying chamber 1 through the purifying chamber inlet with larger area, so in the photocatalyst and photolysis composite oil smoke purifying and collecting hood, the speed of the oil smoke entering the collecting hood is the slowest, and the oil smoke entering the composite purifying chamber has enough purifying time through the wind pressure balance effect of the light blocking guide plate 3 on the passing oil smoke, so that the purifying rate is very high. The light-blocking guide plate 3 mainly plays a role in enabling air flow to be uniform, blocking ultraviolet light from leaking and blocking solid and liquid components in oil smoke.
Gaseous state composition in the oil smoke gets into compound clean room 1 and purifies, and the gas after the purification gets into the great collection smoke box 2 of inner chamber by clean room export 101 in, and the gas is under the produced wind pressure effect of fan in smoke exhaust pipe in collection smoke box 2, discharges the collection petticoat pipe through total air outlet 201 to discharge into the atmosphere through smoke exhaust pipe. The smoke collecting box 2 is mainly used for discharging the gas in the composite purifying chamber 1 in a balanced manner. The composite purification room 1 is prevented from being directly connected to a smoke exhaust pipeline with a smaller diameter, so that the flow speed of the outlet 101 of the purification room is too high, and the air in the composite purification room 1 has insufficient time for purification. The air pressure in the compound purifying chamber is more balanced after the smoke collecting box 2 is arranged, the gas flow velocity is stable, the purifying efficiency is improved, and the long-term qualified emission of oil smoke can be realized.
The design of at least one purifying chamber outlet 101 is to balance the oil smoke gas discharge speed and discharge capacity in the composite purifying chamber 1, so that the purifying treatment capacity of each area in the composite purifying chamber 1 is balanced and stable. The discharge capacity of the oil smoke can be increased by increasing the number of the outlets 101 of the purification chambers, or the positions of the outlets 101 of the purification chambers are adjusted, so that the air outlet of the composite purification chamber 1 is uniform, and the amount of the smoke treated in each part of the composite purification chamber is balanced. Therefore, the oil smoke flow velocity at the light-blocking guide plate 3 of the smoke-collecting hood is reduced, the air pressure is balanced, so that the sufficient purification time is met, meanwhile, the discharge capacity of the composite purification chamber 1 is enough, and the normal oil smoke suction effect can be met.
Moreover, the purifying chamber outlet 101 of the composite purifying chamber 1 is provided with the smoke collecting box 2, and the sound wave generated by the airflow is reflected in the smoke collecting box 2 by utilizing the cavity with larger inner sectional area of the smoke collecting box 2, so that the noise generated by the fan in the smoke exhaust pipeline can be effectively reduced.
The composite purifying chamber 1 of the invention is arranged in the smoke collecting hood, does not occupy other space, solves the problem that the oil smoke purifier with overlarge shape has no space installation in practice, and has compact structure to facilitate the implementation of the work of installation, debugging, maintenance and the like under the restriction conditions of kitchens, buildings and the like.
Specifically, as shown in fig. 1 to 4, when the bottom of the smoke collecting box 2 is the clean room outlet 101 and the top is the total air outlet 201, the airflow flowing direction is the vertical direction, and the total area of all the clean room outlets 101 and the area of the total air outlet 201 are respectively smaller than the area of the horizontal section of the smoke collecting box 2. The clean room outlet 101 and the total air outlet 201 communicated with the smoke collection box 2 are smaller than the cross section of the smoke collection box 2, so that the air outlet pressure of the composite clean room 1 is uniform, and the effect of reducing noise is achieved.
Wherein, to hindering light guide plate 3, hinder light guide plate 3 and be at least one, to miniature photocatalyst and photodissociation combined type oil smoke purification collection petticoat pipe, hinder light guide plate 3 and can only be one, when the area that collection petticoat pipe overall dimension increases, clean room import increases, can set up to at least two and hinder light guide plate 3. The specific structure of the light-blocking guide plate 3 can be realized by adopting the prior art, can be in various forms, such as multilayer metal lath staggered combination, multilayer filter screen and the like, and the light-blocking guide plate 3 with the following requirements can be applied to the smoke collection hood of the application as long as the smoke collection hood can be realized:
1. and ultraviolet light leakage is blocked. National safety standards for the use of uv light sources must be met within the kitchen environment.
2. The air flow at the inlet of the purification chamber is balanced, so that the air inlet of the composite purification chamber 1 is uniform.
3. Can intercept solid-liquid and liquid components in the oil smoke, so that the oil smoke component entering the composite purifying chamber 1 is only in a gaseous state.
Wherein the clean room inlet and the clean room outlet 101 of the composite clean room 1 are not located on the same outer wall of the composite clean room 1, and the clean room inlet and the clean room outlet 101 may be located on any side wall, top wall or bottom wall of the composite clean room 1.
As for the arrangement of the purification chamber outlets 101, as shown in fig. 1 and 3, at least two purification chamber outlets 101 may be arranged at intervals along the length direction or the width of the composite purification chamber 1; alternatively, a plurality of clean room outlets 101 are arranged in an array on any of the outer walls of the composite clean room 1. As shown in fig. 3, when the length of the composite purification chamber 1 is long, at least two purification chamber outlets 101 are uniformly arranged on the top wall of the composite purification chamber 1 at intervals along the length direction, so that the air outlet of the composite purification chamber 1 is uniform, and the amount of flue gas treated in each part inside the composite purification chamber is balanced.
Wherein, in a specific embodiment, the purification chamber outlet 101 is located on the top wall of the composite purification chamber 1, and the purification chamber inlet is located on the front side wall, as shown in fig. 1, fig. 3 and fig. 4, the smoke collection box 2 is a box body, the bottom of which is open and covers the top wall of the composite purification chamber 1, and the top wall of the composite purification chamber 1 is used to enclose the box body, thereby saving the material of the bottom wall. The top of the smoke collecting box 2 is provided with the total air outlet 201. The main air outlet 201 is used for being connected with a smoke exhaust pipeline, a fan is connected in series in the smoke exhaust pipeline, and purified gas is exhausted through the smoke exhaust pipeline under the action of the fan. The smoke collecting box 2 may be a rectangular box, or may be in other shapes, such as a semi-cylindrical shape, a prismatic shape, etc.
On the basis of the scheme, at least one ultraviolet amalgam lamp 4 is fixed on the composite purification chamber 1, photocatalyst layers 5 are fixed on the inner wall of the composite purification chamber 1 and the inner sides of the light blocking guide plates 3, and the irradiation area of at least one ultraviolet amalgam lamp 4 covers all the photocatalyst layers 5.
The ultraviolet amalgam lamp 4 realizes the ultraviolet photolysis purification of the oil smoke: the ultraviolet amalgam lamp 4 generates 185-254nm ultraviolet light and ozone, and the 185-254nm ultraviolet light cuts off carbon chains among organic compounds in the oil smoke, so that carbon, hydrogen and oxygen are subjected to oxidation reaction under the action of the ozone to generate CO2And H2And O, so that the non-methane total hydrocarbons in the oil smoke are degraded into harmless small molecular substances.
The photocatalyst layer 5 realizes the photocatalytic oxidation purification of the oil smoke: the principle of photocatalyst purification is that under the irradiation of ultraviolet light, the photocatalyst generates strong oxidizing substances (hydroxyl radicals, oxygen and the like) which can decompose organic compounds. The photocatalyst has strong oxidizing property after absorbing ultraviolet light emitted by the ultraviolet amalgam lamp 4, and can effectively decompose non-methane total hydrocarbon components in oil fume gaseous substances to degrade the components into harmless micromolecule CO2And H2And O. The photocatalyst has the characteristics of environmental protection, no toxicity, continuous action (permanence), self-cleaning property and the like. Therefore, the photocatalyst layer 5 is laid on the inner wall of the composite purifying chamber 1 (specifically, the back plate 103, the top plate 102 and the inner plate surface 301 of the light-blocking guide plate) to be an effective method for purifying non-methane total hydrocarbons in the oil smoke. The photocatalyst layer 5 is applied by fixing the photocatalyst plate and lightThe surface of the catalyst film or the inner wall of the composite purifying chamber 1 is covered with a photocatalyst coating.
The gaseous components in the oil smoke are purified to generate H through the double purification effects of photolysis reaction and photocatalyst catalytic oxidation in the composite purification chamber 12O and CO2And the like, and harmless small molecular substances. Under the action of wind pressure, the smoke is discharged from the outlet 101 of the purifying chamber to the smoke discharge pipeline through the smoke collection box 2. The treatment aiming at non-methane total hydrocarbon can be realized by both photolysis purification and photocatalyst catalytic oxidation reaction.
Specifically, the wires of the ultraviolet amalgam lamp 4 are led out of the fume collecting hood through the back plate 103 or the top plate 102. Preferably, the ballast for the uv amalgam lamp 4 is installed outside the composite purification chamber 1.
Alternatively, the surfaces of the ultraviolet amalgam lamps 4 irradiated by the light are all provided with photocatalyst layers 5. According to the treatment requirement, the invention also falls into the scope that any part of the composite purification chamber 1 is lost and is not covered with the photocatalyst layer 5.
On the basis of the scheme, the ultraviolet amalgam lamp further comprises a lamp body fixing component 6, and the ultraviolet amalgam lamp 4 is fixed on the inner wall of the composite purification chamber 1 through the lamp body fixing component 6.
The ultraviolet amalgam lamps 4 are fixed in the middle of the composite purification chamber 1 through the lamp body fixing component 6, a certain distance is formed between the ultraviolet amalgam lamps 4 and the side wall, and the distance between each ultraviolet amalgam lamp 4 and all the photocatalyst layers 5 is within an effective irradiation distance range, so that the ultraviolet amalgam lamps 4 can irradiate all the photocatalyst layers 5 within the length range of the lamp tubes, the using amount of the ultraviolet amalgam lamps 4 can be reduced, energy is saved, the purification effect is improved, the use cost is reduced, energy consumption is reduced (the using amount of the ultraviolet amalgam lamps is reduced, the ozone generation amount is reduced), and the treatment effect is improved. In addition, the ultraviolet amalgam lamp 4 is far away from the photocatalyst, so that the capability of generating light-induced holes on the surface of the photocatalyst is easier to excite, and OH on the surface of the photocatalyst is enabled to be-And H2O molecules are oxidized into hydroxyl radicals to generate a photocatalyst catalytic oxidation reaction, so that non-methane total hydrocarbons are decomposed.
As shown in fig. 2, the uv amalgam lamp 4 is a linear lamp tube, and the uv amalgam lamp 4 is disposed along the length direction of the composite purification chamber 1 and in the middle of the composite purification chamber 1 so that it can irradiate all the inner walls of the composite purification chamber 1 and make the photocatalyst generate strong oxidizing substances. Therefore, the composite purifying chamber 1 is compact in structure, small in overall size, small in occupied space and convenient to install.
On the basis of any scheme, the number of the ultraviolet amalgam lamps 4 is at least two, and at least two ultraviolet amalgam lamps 4 are fixed on the top wall and/or the side wall of the composite purification chamber 1.
The ultraviolet amalgam lamp 4 is fixed by the lamp body fixing component 6, and can be fixed on the top wall in the composite purification chamber 1 or fixed on the side wall in the composite purification chamber 1 according to the design requirement (such as the required power). According to the energy design requirement, as shown in fig. 2 and fig. 3, 1 or more ultraviolet amalgam lamps 4 can be installed in the same length range, but the ultraviolet amalgam lamps 4 can not be blocked by the fixing piece in the composite purification chamber 1, and can irradiate in all directions. That is, along the length direction of the composite purification chamber 1, the top wall thereof is provided with at least one ultraviolet amalgam lamp 4, and if at least two ultraviolet amalgam lamps 4 are arranged in sequence, they can also be arranged at intervals, and/or the side wall of the composite purification chamber 1 is provided with at least one ultraviolet amalgam lamp 4, and if at least two ultraviolet amalgam lamps 4 are arranged in sequence, they can also be arranged at intervals. According to the length of the fume collecting hood, the ultraviolet amalgam lamps 4 extend to different length areas in the composite purifying chamber 1, so that 1 or more ultraviolet amalgam lamps 4 irradiate all the length areas. The ultraviolet amalgam lamp 4 is installed and fixed in the whole space of the composite purifying chamber 1, so that the distance between the ultraviolet amalgam lamp and all the photocatalyst layers 5 of the composite purifying chamber 1 cannot be too large.
On the basis of any scheme, a guide plate upper rail 7 and a guide plate lower rail 8 are fixed on two opposite sides of an inlet of the purification chamber, and the light-blocking guide plate 3 is slidably mounted between the guide plate upper rail 7 and the guide plate lower rail 8.
The light-blocking guide plate 3 is slidably arranged in the track, so that the light-blocking guide plate 3 is convenient to replace, or the light-blocking guide plate 3 is detached to maintain the inside of the composite purification chamber 1.
The light-blocking guide plate 3 is provided with a light-blocking guide plate inner plate surface 301 and a light-blocking guide plate outer plate surface 302 which are parallel to each other, the light-blocking guide plate outer plate surface 302 faces the outer side of the composite purification chamber 1, and the inner side of the light-blocking guide plate inner plate surface 301 is provided with a photocatalyst layer 5. Optionally, the photocatalyst layer 5 is located on the inner side of the inner panel surface 301 of the light blocking guide plate, and is slidably inserted between the upper guide plate rail 7 and the lower guide plate rail 8.
On the basis of any scheme, the oil recovery device further comprises a residual oil recovery device 9, wherein the residual oil recovery device 9 is fixed below the guide plate lower rail 8, the guide plate lower rail 8 is provided with a residual oil port 13, and the residual oil port 13 is communicated with the residual oil recovery device 9.
The light-blocking guide plate 3 blocks solid-liquid and liquid components in the oil smoke, so that the oil smoke component entering the composite purifying chamber 1 is only in a gas state, and the blocked solid-liquid components of the oil smoke flow down along the light-blocking guide plate 3 and enter the residual oil recoverer 9 through a residual oil port 13 of the guide plate lower rail 8.
On the basis of any scheme, the bottom of the residual oil recoverer 9 is closed to form an oil collecting groove 10, and the oil collecting groove 10 is connected with a residual oil discharge pipe 11.
Specifically, one side wall of the bottom of the residual oil recoverer 9 is obliquely arranged to form a closing-in, and solid and liquid components in the residual oil recoverer 9 are collected to the bottom residual oil recoverer 9 along the oblique side wall, then pass through the residual oil discharge pipe 11, and finally are collected in a residual oil recovery barrel communicated with the outside.
On the basis of any one of the above schemes, there are at least two light blocking deflectors 3, and at least two light blocking deflectors 3 are arranged side by side.
The light-blocking guide plate 3 is divided into a plurality of parts, on one hand, the light-blocking guide plate 3 with small area is more convenient to transport and manufacture, on the other hand, when the composite purifying chamber 1 is maintained and maintained, the next light-blocking guide plate 3 can be only detached, and the operation is convenient.
On the basis of any one of the above schemes, the composite purification chamber 1 comprises a top plate 102, a back plate 103, an air inlet plate 104 and end plates, wherein the back plate 103, the top plate 102 and the air inlet plate 104 are sequentially connected, the air inlet plate 104 and the back plate 103 are connected to form a cylindrical purification chamber main body, the two end plates are two, the two end plates are respectively sealed at two ends of the purification chamber main body, the top plate 102 is provided with at least one purification chamber outlet 101, and the air inlet plate 104 is provided with a purification chamber inlet.
The purifying chamber main body adopts a cylindrical structure, the ultraviolet amalgam lamp 4 and the photocatalyst layer 5 have compact structure and high space utilization rate.
In one specific embodiment, as shown in fig. 1-4, the composite purification chamber 1 has a triangular prism configuration. Of course, alternatively, the composite purification chamber 1 may also take other shapes, such as a prism shape like a quadrangular prism, or, on the basis of a triangular prism structure, the top plate 102, the back plate 103, or the air inlet plate 104 may be configured as a curved arc plate.
Specifically, at least two ultraviolet amalgam lamps 4 are fixed on the top plate 102 and/or the back plate 103 of the composite purification chamber 1. The top plate 102, the back plate 103 and the light-blocking guide plate 3 are provided with a photocatalyst layer 5.
On the basis of any scheme, a smoke collection shell 12 is fixed on the outer side of the inlet of the purification chamber.
As shown in fig. 1 and 4, the smoke collection shell 12 collects the oil smoke to the inlet of the purification chamber, so as to improve the suction effect of the oil smoke. Specifically, the front side board of collection cigarette shell 12 is followed the top of clean room import and is gone up and slant downwardly extending, and collection cigarette shell 12 links up along the vertical setting of end plate and the front side board at length direction both ends for gather together the flue gas.
In any of the above solutions, the area of the purification chamber inlet is larger than the total area of at least one of the purification chamber outlets 101.
The area of the inlet of the purifying chamber is larger, so that the wind speed at the inlet of the purifying chamber is reduced, and the gas has enough purifying time after entering the composite purifying chamber 1.
It should be noted that the appearance of the photocatalyst and photolysis combined type fume purification fume collecting hood of the present invention is similar to that of the fume collecting hood in the common form, and no matter what size (length, width and height) and no matter what auxiliary function is set, the purposes of easy fume collection and convenient operation are provided, and the materials of the composite purification chamber 1, the fume collecting shell 12 and the fume collecting box 2 are generally stainless steel or steel plates.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. The utility model provides a photocatalyst and photodissociation combined type oil smoke purification collection petticoat pipe, its characterized in that, includes composite purification room (1) and collection smoke box (2), composite purification room (1) has clean room import and at least one clean room export (101), install in the clean room import and hinder light guide plate (3), collection smoke box (2) with composite purification room (1) fixed connection and with at least one clean room export (101) intercommunication, collection smoke box (2) have total air outlet (201).
2. The fume purification and collection hood with photocatalyst and photolysis combination as claimed in claim 1, wherein at least one ultraviolet amalgam lamp (4) is fixed on the composite purification chamber (1), a photocatalyst layer (5) is fixed on the inner wall of the composite purification chamber (1) and the inner side of the light blocking deflector (3), and the irradiation area of at least one ultraviolet amalgam lamp (4) covers all the photocatalyst layers (5).
3. The photocatalyst and photolysis combined type lampblack purification and collection hood according to claim 2, further comprising a lamp body fixing component (6), wherein the ultraviolet amalgam lamp (4) is fixed on the inner wall of the composite purification chamber (1) through the lamp body fixing component (6).
4. The photocatalyst and photolysis combined type lampblack purification and collection hood as claimed in claim 2, wherein the number of the ultraviolet amalgam lamps (4) is at least two, and at least two ultraviolet amalgam lamps (4) are fixed on the top wall and/or the side wall of the combined purification chamber (1).
5. The photocatalyst and photolysis combined type lampblack purification and collection hood as claimed in claim 1, wherein a guide plate upper rail (7) and a guide plate lower rail (8) are fixed on two opposite sides of the inlet of the purification chamber, and the light blocking guide plate (3) is slidably mounted between the guide plate upper rail (7) and the guide plate lower rail (8).
6. The photocatalyst and photolysis combined type lampblack purification and collection hood as claimed in claim 5, further comprising a residual oil recoverer (9), wherein the residual oil recoverer (9) is fixed below the guide plate lower rail (8), the guide plate lower rail (8) is provided with a residual oil port (13), and the residual oil port (13) is communicated with the residual oil recoverer (9).
7. The photocatalyst and photolysis combined type lampblack purification and collection hood as claimed in claim 6, wherein the bottom of the residual oil recoverer (9) is closed to form an oil collection groove (10), and the oil collection groove (10) is connected with a residual oil discharge pipe (11).
8. The combined type fume purification and collection hood according to any one of claims 1-7, wherein there are at least two light blocking deflectors (3), and at least two light blocking deflectors (3) are arranged side by side.
9. The photocatalyst and photolysis combined type lampblack purification smoke collecting hood as claimed in any one of claims 1 to 7, wherein the combined purification chamber (1) comprises a top plate (102), a back plate (103), an air inlet plate (104) and end plates, the back plate (103), the top plate (102) and the air inlet plate (104) are connected in sequence, the air inlet plate (104) and the back plate (103) are connected to form a cylindrical purification chamber main body, the number of the end plates is two, the two end plates respectively seal two ends of the purification chamber main body, the top plate (102) is provided with at least one purification chamber outlet (101), and the air inlet plate (104) is provided with the purification chamber inlet.
10. The photocatalyst and photolysis combined type lampblack purification and collection hood as claimed in any one of claims 1 to 7, wherein a smoke collection shell (12) is fixed on the outer side of the purification chamber inlet; the area of the clean room inlet is larger than the total area of all the clean room outlets (101).
CN202111086262.0A 2021-09-16 2021-09-16 Photocatalyst and photolysis combined type oil smoke purification and collection hood Pending CN113769576A (en)

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