CN108844113B - Fluidized bed type oil fume treatment equipment and application thereof - Google Patents
Fluidized bed type oil fume treatment equipment and application thereof Download PDFInfo
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- CN108844113B CN108844113B CN201811036551.8A CN201811036551A CN108844113B CN 108844113 B CN108844113 B CN 108844113B CN 201811036551 A CN201811036551 A CN 201811036551A CN 108844113 B CN108844113 B CN 108844113B
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The invention provides fluidized bed type oil fume treatment equipment and application thereof. A fluidized bed type fume treatment device comprises a fume collecting hood, a reaction box and a fan; the fan controls the flue gas to enter the fume collecting hood and pass through the reaction box, and finally is discharged; a humidifier, an ultraviolet lamp, a gas distribution plate and a stainless steel wire filter membrane are sequentially distributed in the reaction box along the discharge direction of the flue gas, and a flue gas outlet of the reaction box is sequentially blocked by the gas distribution plate and the stainless steel wire filter membrane; the gas distribution plate and the stainless steel wire filter membrane are preferably renewable; the humidifier is used for humidifying the gas entering the reaction box. The invention realizes higher oil fume purifying rate by utilizing the oxidation reaction of OH and oil fume with high mass transfer coefficient.
Description
Technical Field
The invention relates to the technical field of machinery, in particular to fluidized bed type oil fume treatment equipment and application thereof.
Background
The dietary structure of Chinese people is different from that of western people, and the food type and cooking tools are quite different from those of western countries. In the processing of Chinese diets, the Chinese diets are fried, fried and cooked in a large proportion, so that the oil smoke in a Chinese kitchen is large, and the kitchen environment is easy to become greasy and is difficult to clean; meanwhile, the kitchen fume contains more than 300 harmful substances, and has serious harm to human health and environment.
From the cause, kitchen oil fume is mainly oil fume generated in the heating process of edible oil and food. During cooking, the water foam in the dish is vaporized and expanded rapidly, and part of the water foam is condensed into mist and forms visible oil smoke mist together with the oil smoke. The oil smoke is mainly water mist, and only a small amount of oil gas and oil smoke which are not mutually infiltrated with the water mist are clamped at the upper part. In addition, the soot exhaust gas has some irritating taste.
From the morphological aspect, the oil fume waste gas comprises grease particles, volatile organic matters and gaseous pollutants, the liquid viscosity is high, and the peculiar smell is mainly caused by the gaseous pollutants.
From the composition point of view, the pollutants in the kitchen fume mainly comprise carbon black particles, organic macromolecular particles and Volatile Organic Compounds (VOCs) generated by oil drops and incomplete combustion of fuel.
At present, kitchen oil smoke waste gas is treated at home and abroadThe treatment equipment mainly comprises inertial separation, electrostatic deposition, membrane filtration, washing and the like, is mainly used for removing particles in kitchen oil mist, and has a very small effect on removing VOC. With increasing importance of fume treatment, devices for targeted removal of VOCs have been researched, and the principles used by the devices mainly comprise ultraviolet irradiation or ozone oxidation and low-temperature plasma, but the devices are low-efficiency devices, the achieved effect is not obvious, related emission standards cannot be met, input and output are not matched, and the cost performance is low. Taking the oil smoke emission standard of the food industry in Beijing as an example, the oil and fat in the oil and smoke required to be emitted is 1mg/m 3 The content of the particulate matter was 5mg/m 3 The VOC content was below 10mg/m 3 In the following, the existing purification apparatus cannot stably meet the requirement at all for a long time.
In view of this, the present invention has been made.
Disclosure of Invention
The invention aims to provide fluidized bed type oil fume treatment equipment, which utilizes the principle of efficient oxidation reaction of hydroxyl radicals and oil fume under a fluidized bed reaction device, improves the removal rate of organic colloid particles and VOC in oil fume, and has the characteristics of explosion prevention, fire prevention, no ignition energy and the like.
In order to achieve the above object, the present invention provides the following technical solutions:
a fluidized bed type oil fume treatment device,
comprises a fume collecting hood, a reaction box and a fan;
the fan controls the flue gas to enter the fume collecting hood and pass through the reaction box, and finally is discharged;
a humidifier, an ultraviolet lamp, a gas distribution plate and a stainless steel wire filter membrane are sequentially distributed in the reaction box along the discharge direction of the flue gas, and a flue gas outlet of the reaction box is sequentially blocked by the gas distribution plate and the stainless steel wire filter membrane; the gas distribution plate and the stainless steel wire filter membrane are preferably renewable;
the humidifier is used for humidifying the gas entering the reaction box;
preferably, an ultraviolet lamp is further arranged between the gas distribution plate and the stainless steel wire filter membrane.
The fluidized bed type oil fume treatment equipment mainly comprises three basic units, wherein the three basic units provide conditions for generating hydroxyl free radicals and a fluidized reaction environment, so that the function of efficiently removing organic colloid particles and VOC is realized.
The three basic units include: a humidifier for providing water, an ultraviolet lamp for providing ultraviolet rays, a gas distribution plate and a stainless steel wire filter membrane for generating fluidization reaction.
To achieve efficient oxidation of the oil flue gas by hydroxyl radicals, the basic conditions of the oxidation reaction that produce a large number of hydroxyl radicals and a high mass transfer coefficient must be met.
To this end, the present invention supplies hydroxyl radicals through two main channels: firstly, generating a large amount of hydroxyl free radicals by using water under the irradiation of an ultraviolet lamp, wherein the reaction formula is shown as formula (I); and secondly, oxygen in the air generates oxygen free radicals under the irradiation of an ultraviolet lamp, and the oxygen free radicals further react with water to generate hydroxyl free radicals, wherein the reaction formulas are shown in formulas (II) and (III).
H 2 O+UV- & gtH+ & OH formula (I)
O 2 +UV→2. O type (two)
·O+H 2 O.fwdarw.2.OH formula (III)
The invention provides oxidation reaction equipment with higher mass transfer coefficient through the structural design of the gas distribution plate and the stainless steel wire mesh filter membrane:
the reaction box simulates the reaction principle of a fluidized bed, so that reactants (including hydroxyl radicals and oil fume) are redistributed when passing through the gas distribution plate, and partial oil fume leakage is prevented from being directly discharged into the atmosphere without contacting with OH; after the oil fume is redistributed, OH and oil fume pass through the gas distribution plate, substances to be oxidized (especially benzene and colloid particle substances which are difficult to oxidize) in the oil fume are enriched on the stainless steel wire mesh filter membrane, and at the moment, the oil fume and OH are in boiling contact between the gas distribution plate and the stainless steel wire filter membrane to perform oxidation reaction for a long time with a large contact area.
Therefore, as the OH and the oil fume are intercepted between the gas distribution plate and the stainless steel wire filter membrane, the two reactants stay for a short time, and particles and colloid substances in the oil fume are enriched on the surface of the stainless steel wire filter membrane, so that the contact area of the OH and the oil fume is larger, the stay time of the substances to be oxidized is prolonged, the reaction time is prolonged, namely, the mass transfer system of the oxidation reaction is improved from the aspects of the reaction area and the reaction time, and finally the purification efficiency is improved. In addition, the stainless steel wire filter membrane also completes self regeneration in the oxidation reaction process.
In summary, the working flow of the fluidized bed type oil fume treatment device provided by the invention is as follows:
under the action of a fan, the fume enters the fume collecting hood, then enters the reaction box, and simultaneously the humidifier humidifies the gas passing through the interior of the reaction box, so that water is excited to generate OH under the irradiation of an ultraviolet lamp, and part of oxygen is also excited and contacted with the water to generate OH. Then, OH and oil fume are driven by a fan to pass through a gas distribution plate in a reaction box, enter a region between the gas distribution plate and a stainless steel wire filter membrane after gas distribution, and compounds to be oxidized (particularly colloid substances which are difficult to oxidize) in oil gas are enriched on the stainless steel wire filter membrane, and the pressure drop forces the OH and the oil fume to be in a fluidized state in the region to carry out boiling contact due to a certain pressure drop, so that large-probability radial mass transfer occurs, and further the organic substances in the oil fume are fully reacted to be decomposed into CO 2 And H 2 O. In addition, the stainless steel wire filter membrane is in a vibration state at any time, so that the pore channels on the stainless steel wire filter membrane are not easy to be blocked by particles in the lampblack; therefore, the invention not only avoids the problem of greatly reduced purification efficiency caused by the blockage of the pore canal after short-time use, but also improves the degradation rate of pollutants by improving the mass transfer coefficient of the reaction of hydroxyl free radicals and the lampblack gas, thereby meeting the emission requirement.
In addition, O is preferentially bound to O because oxygen is easily spontaneously generated 2 O generation 3 (as in equation (IV)), while O 3 The oxidizing property to VOCs is much lower than OH. Therefore, in practical use, it is preferable to form a high humidity environment inside the reaction chamber before the fume enters the reaction chamber in order to reduce the yield of ozone.
·O+O 2 →O 3 Fourth, the method is characterized in that
As described above, the present invention is mainly used for the decomposition treatment of volatile organic compounds or soot organic colloidal particles, and thus its application field is very wide, and not only limited to soot treatment in kitchen, but also includes exhaust treatment in chemical plants, exhaust treatment in sewage plants, exhaust treatment in garbage disposal sites, or automobile exhaust treatment.
Although the chemical reaction principle utilized by the present invention is very common, particularly in sewage treatment, like the Fenton reaction, it has the capability of purifying organic compounds with high efficiency and broad spectrum, the present invention overcomes a number of difficulties in achieving such oxidation reactions, including:
(1) How to realize continuous purification treatment without affecting the operation of fume exhaust from a fume source, and simultaneously realize regeneration of a membrane body and improve the adaptability of equipment;
(2) How to integrate the purification system and the fume emission system, and reduce the occupied space, operation, manufacturing cost and the like of the equipment;
(3) How to efficiently generate a large amount of OH;
(4) How to degrade and remove VOCs in a broad spectrum with high efficiency.
On the basis of the above core structure, the mechanical construction of the device of the invention can be further improved, in particular as follows.
Preferably, the gas distribution plate and the stainless steel wire filter membrane are preferably renewable; so as to realize long-term continuous use of the equipment, and the service life of the equipment is longer when stainless steel materials are selected for the equipment.
Preferably, an ultraviolet lamp is further arranged between the gas distribution plate and the stainless steel wire filter membrane.
By adding an ultraviolet lamp in this area, the production of OH can be increased, and the oxidation efficiency and degradation capability can be improved.
Preferably, the humidifier is a water atomizer.
In addition, the humidifier used in the scheme is a water atomizer, so that the water in the reaction tank is in a water vapor state, and the runoff problem can not occur, and a special liquid tank and a special water return device are not required to be arranged.
Preferably, the reaction box and the fume collecting hood are connected into a whole by two layers of air deflectors, and the fume enters the reaction box through the two layers of air deflectors;
in the two layers of air deflectors, a plurality of air guide holes are formed in each air deflector, and the air guide holes in the two layers of air deflectors are distributed in a staggered mode.
The reaction box and the fume collecting hood are integrated into a whole, and the reaction box and the fume collecting hood have a plurality of advantages:
(1) The volume of the equipment is reduced;
(2) The oil smoke channel is shortened, so that the energy is saved and the efficiency is improved;
(3) The structure of the traditional oil fume purifying equipment is slightly changed, the product is more convenient to upgrade, and the inner structure of the fume collecting hood or a certain side plate is only required to be modified generally, namely the invention and the traditional oil fume purifying equipment can share the same fume collecting hood;
(4) The air guide holes on two adjacent layers of air guide plates are distributed in a staggered manner, so that ultraviolet light leakage can be avoided, and the human body is injured.
Preferably, the air guide holes on two adjacent layers of air guide plates are distributed at equal intervals in a staggered manner, so that impact flow can be generated, granulation can be carried out, and the purification rate of oil smoke is improved.
Preferably, the bottom of the reaction box is provided with an oil drain groove.
The oil drain groove can collect oil stains flowing backwards, so that the cleaning is convenient.
Preferably, the two layers of air deflectors are removable for cleaning and maintenance.
Preferably, the water spray nozzle of the water atomizer is made of ceramic materials, so that on one hand, scale is prevented from blocking an outlet, and on the other hand, electronic interference generated by metal and generation of OH are avoided.
Preferably, the reaction box is composed of a plurality of U-shaped box bodies side by side;
the left side and the right side of each U-shaped box body are communicated through the bottom, and a smoke outlet of the smoke collecting cover is communicated with an air inlet of a right box body of the U-shaped box body;
the left box body of the U-shaped box body is provided with the ultraviolet lamp, the gas distribution plate and the stainless steel wire filter membrane, and the gas distribution plate and the stainless steel wire filter membrane sequentially block the air outlet of the left box body of the U-shaped box body;
an impinging stream component and the humidifier are arranged in the right box body of the U-shaped box body, and the humidifier is a jet pipe; the impinging stream assembly comprises from top to bottom: the first guide plate and the second guide plate; the jet pipe is arranged between the first guide plate and the second guide plate, the first guide plate is formed by splicing an arc-shaped plate and two flat plates, the two flat plates are respectively spliced at two sides of the arc-shaped plate, and an open cavity is formed between the two flat plates and the arc-shaped plate; the second guide plate consists of two guide plates which are oppositely arranged, and a pore canal formed by the two guide plates is communicated with the opening of the first guide plate;
the jet pipes in all the reaction boxes are connected with water supply pipes.
The bottom of the U-shaped box body is communicated with a liquid box which is independently arranged.
Compared with the scheme of the integrated structure, the scheme is additionally provided with the pretreatment equipment, and is suitable for the environment with large oil smoke discharge capacity.
The structure comprises a pretreatment process, is mainly completed in a right box body of the U-shaped box body, and has the following functions.
(1) The jet pipe is used for humidifying to provide moisture for the formation of hydroxyl radicals in the left box body and provide high-humidity oil smoke.
(2) Pretreatment of the lampblack is carried out by utilizing impinging stream: the oil smoke and the water are impacted in an impact area formed by the first guide plate and the second guide plate, and are in deep contact. Because the gas is light in weight and small in field energy during impact, the forward flow permeates into the reverse flow, meanwhile, the reverse flow permeates into the forward flow, and the gas generates oscillating motion, so that oil drop particles in the flue gas are increased, the granulation process is finished, and meanwhile, the oil drop particles are enriched in water and flow into the reflux groove; the liquid has large field energy when impacted due to large mass, and partial liquid molecules form polarization phenomenon; the oil drops and solid particles in the flue gas can directionally move towards polarized water molecules to generate absorption and adsorption effects, and the oil drops and the particles are enriched in a liquid box through physical sedimentation. Therefore, the right side box body of the U-shaped box body can remove partial oil drops and VOC in the oil smoke, the pretreatment process is completed, and the burden is reduced for the degradation process of hydroxyl radicals of the left side box body.
(3) The jet pipe generates impact water flow to absorb a large amount of heat, reduce the temperature of a kitchen or other operation room and fundamentally remove the possibility of fire disaster in a flue.
Preferably, the top of the liquid tank is provided with a water supply pipe, the bottom of the liquid tank is provided with a drain pipe, and the water supply pipe and the drain pipe are both provided with valves.
The structure is convenient for controlling the sewage or the water discharge according to the pollution degree and the water quantity of the backwater water.
Preferably, the water supply pipe is in communication with the tank.
The water supply pipe is communicated with the liquid tank, so that water can be recycled, and energy conservation and emission reduction are realized.
Preferably, a plurality of groups of other stainless steel wire filter membranes which are sequentially and parallelly distributed along the direction of the smoke outlet are also arranged between the gas distribution plate and the stainless steel wire filter membranes; thus, the reaction time of the lampblack and the hydroxyl free radical can be increased, the mass transfer coefficient is further improved, and the purifying effect is improved.
Preferably, one or more groups of all the stainless steel wire filter membranes are pleated stainless steel wire filter membranes; the surface area of the corrugated stainless steel wire filter membrane is large, which is more beneficial to deep degradation of oil smoke.
Preferably, an ultraviolet lamp is arranged between every two groups of stainless steel wire filter membranes;
preferably, the surface of the stainless steel wire filter membrane is provided with a titanium dioxide coating.
The titanium dioxide can generate light holes and photoelectrons under the action of ultraviolet light, has strong oxidation-reduction capability, and can partially decompose formaldehyde, toluene, dimethylbenzene, ammonia, radon, VOC and other harmful organic matters, pollutants, odor, bacteria, viruses, microorganisms and other harmful organic matters into harmless CO 2 And H 2 O has the characteristics of pollutant removal, hydrophilicity, self-cleaning property and the like, has lasting performance and does not produce secondary pollution.Therefore, the stainless steel wire filter membrane is provided with the titanium dioxide coating, so that the stainless steel wire filter membrane can be protected from being polluted, the degradation rate of VOC can be increased, and the purifying effect can be improved.
Preferably, the surface areas of the stainless steel wire filter membranes are sequentially increased from the air inlet to the air outlet.
At this time, along with the outward discharge of the oil fume, the contact area between the oil fume and OH is larger and larger, the reaction is more and more thorough, and especially when the reaction is carried out to the later stage, the chemical reaction balance can reversely move, and at this time, the contact area is increased by increasing the area of the steel wire mesh, so that the balance forward movement is facilitated.
Preferably, the stainless steel wire filter membrane is a detachable structure for cleaning and maintenance.
Preferably, the gas distribution plate is a detachable structure for cleaning and maintenance.
Preferably, the reaction tank is of a detachable construction for cleaning and maintenance.
Preferably, an ultraviolet lamp is arranged between every two groups of stainless steel wire filter membranes.
Preferably, the wavelength of the light irradiated by the ultraviolet lamp is below 200nm, and preferably 185nm.
H 2 O and O 2 The formation of OH can be sufficiently excited at the above wavelength.
Preferably, in the actual processing apparatus, the arrangement of the switching of the ultraviolet lamp and the monitoring and other matching parts (ballast, indicator lamp, etc.) is also considered, and is generally configured to facilitate the operation or the automatic control.
Preferably, the humidifier also comprises a controller, wherein the controller controls the opening and closing of the fan, the ultraviolet lamp and the humidifier.
Preferably, the controller is further provided with an indicator lamp, and the indicator lamp is connected with the controller.
Preferably, the ultraviolet lamp shade is provided with a detachable and ultraviolet-transmitting shell, so that ultraviolet light is protected from being polluted by oil stains.
Preferably, an air outlet of the reaction box is connected with a purifying box, and the purifying box is filled with a reducing agent and a catalyst which can be oxidized by ozone.
The reducing agent in the purifying box can remove ozone and avoid environmental pollution caused by the discharge of the reducing agent into the atmosphere.
Preferably, the shape and structure of the fume collecting hood of the present invention are not limited, and can be a conventional top suction type or side suction type, or other better structure (including later developed structures).
Preferably, the fume collecting hood is in a conical shape or a tubular shape. The cone is typically of a small top and large bottom construction, a shape that is conventional in the art and is relatively common in kitchens.
In the invention, the position of the fan is not limited, and the fan can be arranged at the beginning end or the tail end of the main air pipe.
In summary, compared with the prior art, the invention achieves the following technical effects:
(1) The fluidized bed type fume treatment equipment utilizes the oxidation reaction of OH and fume with high mass transfer coefficient, improves the fume purification rate, and is more suitable for production or living situations with large fume discharge;
(2) The parts of the fluidized bed type oil fume treatment equipment are designed into a detachable structure, so that the fluidized bed type oil fume treatment equipment is more convenient to clean and maintain;
(3) The ozone absorption device is added, so that negative effects of equipment on the environment are avoided;
(4) The fluidized bed type oil fume treatment device has wide application, and is suitable for treating various volatile organic matters, such as kitchen oil fume treatment, tail gas treatment of chemical plants, tail gas treatment of sewage plants or tail gas treatment of garbage treatment sites;
(5) Meanwhile, the device can physically enrich non-organic particulate matters in a part of gas through the gas distribution plate, particularly the stainless steel filter membrane, and the purification of the particulate matters is completed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a side view of a fluidized bed type oil fume treatment device provided in embodiment 1 of the present invention;
FIG. 2 is a cross-sectional view of the air deflection panel of FIG. 1 taken along line A-A;
FIG. 3 is a schematic perspective view of the air deflection plate of FIG. 1;
fig. 4 is a front view of a fluidized bed type oil fume treatment device provided in embodiment 1 of the present invention;
fig. 5 is an external view of the fluidized bed type oil fume treatment device provided in embodiment 1 of the present invention in front view;
fig. 6 is a side view of a fluidized bed type oil fume treatment device provided in embodiment 2 of the present invention;
fig. 7 is a front view of a fluidized bed type oil fume treatment device provided in embodiment 2 of the present invention;
fig. 8 is a side view of a fluidized bed type oil fume treatment device provided in embodiment 3 of the present invention;
fig. 9 is a side view of another fluidized bed type fume treatment device provided by the invention;
FIG. 10 is a schematic view of the structure of the air distribution plate according to the present invention;
FIG. 11 is a schematic structural view of a stainless steel wire filter membrane provided by the invention;
reference numerals:
1-fume collecting hood, 2-reaction box, 3-air deflector, 4-water atomizer, 5-main air outlet pipe, 6-fan,
201-gas distribution plate, 202-ultraviolet lamp, 203-oil drain groove, 204-main water supply pipe, 205-jet pipe, 206-air inlet, 207-reflux groove, 208-first guide plate, 209-second guide plate, 210-ballast, 211-indicator lamp, 212-water supply pipe, 213-drain pipe, 214-water supply pipe valve, 215-drain pipe, 216-overflow pipe, 217-stainless steel wire filter membrane, 218-handle, 219-detachable access plate, 220-indicator lamp,
301-air duct.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and detailed description, but it will be understood by those skilled in the art that the examples described below are some, but not all, examples of the present invention, and are intended to be illustrative of the present invention only and should not be construed as limiting the scope of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
Example 1
A fluidized bed type fume treatment device has a structure shown in figures 1 to 5.
The device comprises a water atomizer 4, an ultraviolet lamp 202, a fume collecting hood 1 and a fan 6, wherein the fume collecting hood 1 is connected with a reaction box 2, and the fume collecting hood 1 is in a cone shape with a small upper part and a large lower part.
The ultraviolet lamp 202 irradiates light with a wavelength of 185nm.
The reaction box 2 and the fume collecting hood 1 are connected into a whole by two layers of air deflectors 3, and the fume enters the reaction box 2 through the two layers of air deflectors 3; as shown in fig. 2 and 3, in the two layers of air deflectors 3, a plurality of air guide holes are formed in each air deflector 3, the air guide holes in the two adjacent layers of air deflectors 3 are distributed in an equidistant and staggered manner, and an air flue 301 for circulating oil smoke is formed between the two layers of air deflectors 3.
The fan 6 controls the flue gas to enter the fume collecting hood 1 through the air guide holes on the air guide plate 3, so that the flue gas passes through the reaction box 2 and is finally discharged from the main air outlet pipe 5.
Inside the reaction box 2, a water atomizer 4, an ultraviolet lamp 202, an air distribution plate 201 and two stainless steel wire filter membranes 217 are sequentially distributed from an air inlet 206 to an air outlet; the air outlet of the reaction box 2 is plugged by a stainless steel wire filter membrane 217.
The mesh numbers of two adjacent stainless steel wire filter membranes 217 are different; the surface of the stainless steel wire filter membrane 217 is provided with a titanium dioxide coating; from the air inlet 206 to the air outlet, the surface area of the plurality of stainless steel wire filter membranes 217 increases in sequence. The stainless steel wire filter 217 has a pleated shape as shown in fig. 11.
The bottom of the reaction tank 2 is provided with an oil drain tank 203.
The final air outlet of the fume collecting hood 1 is connected with a purifying box, and the purifying box is filled with a reducing agent and a catalyst which can be oxidized by ozone.
Most of the structure of the device is detachable: the two layers of air deflectors 3 are detachable, the stainless steel wire filter membrane 217 is of a detachable structure, the ultraviolet lamp 202 is further covered with a detachable and ultraviolet-transmitting shell, and the oil drain groove 203 at the bottom of the reaction box 2 is detachable.
The equipment also comprises a necessary controller, preferably an automatic central controller, so as to control the opening and closing of the fan, the ultraviolet lamp and the humidifier; and corresponding indicator lamps 220 are configured to indicate the working states of all the devices and play a role in warning. The housing of the device is provided with a detachable access panel 219.
The working process of the equipment is as follows:
the fan 6, the water atomizer 4 and the ultraviolet lamp 202 are started, the oil fume enters the reaction box 2 after passing through the air deflector 3 on the fume collecting hood 1 layer by layer, the oil fume passes through fluidized oxidation reaction in the reaction box 2, oil drops and VOC in the oil fume are degraded, and then the oil fume passes through adsorption reaction of the purification box and is finally discharged. In this process, the oil droplets flowing back in the reaction tank 2 flow into the oil drain tank 203, and are periodically poured and cleaned.
In addition, the number of layers of the stainless steel wire filter membrane 217 can be increased, and an ultraviolet lamp is arranged between every two layers of the stainless steel wire filter membrane 217, as shown in fig. 9. As shown in FIG. 10, the air distribution plate 201 can be made of a woven plate woven by stainless steel wire gauze, and a handle 218 can be additionally arranged below the air distribution plate, so that the air distribution plate is convenient to detach and maintain.
Example 2
A fluidized bed type fume treatment device has a structure shown in figures 6 and 7.
Comprises a humidifier, an ultraviolet lamp 202, a fume collecting hood 1 and a fan 6, wherein the fume collecting hood 1 is connected with a reaction box 2; the fan 6 controls the flue gas to enter the fume collecting hood 1 and pass through the reaction box 2, and finally is discharged from the main air outlet pipe 5. The ultraviolet lamp 202 irradiates light with a wavelength of 185nm. The ultraviolet lamp 202 is provided with a ballast 210, an indicator lamp 211, and other accessory parts.
The reaction tank 2 is composed of a plurality of units, namely a plurality of U-shaped tanks side by side.
The left side and the right side of each U-shaped box body are communicated through the bottom, and the smoke outlet of the smoke collecting cover 1 is communicated with the air inlet 206 of the right side box body of the U-shaped box body.
The left side box of U type box is equipped with ultraviolet lamp 202, cloth gas net 201 and stainless steel wire filter membrane 217, and stainless steel wire filter membrane 217 shutoff U type box's left side box's air outlet.
An impinging stream component and a humidifier are arranged in the right box body of the U-shaped box body, and the humidifier is a jet pipe 205; the impinging stream assembly comprises from top to bottom: a first baffle 208 and a second baffle 209; a jet pipe 205 is arranged between the first guide plate 208 and the second guide plate 209, the first guide plate 208 is formed by splicing an arc-shaped plate and two flat plates, the two flat plates are respectively spliced at two sides of the arc-shaped plate, and an open cavity is formed between the two flat plates and the arc-shaped plate; the second baffle 209 is composed of two opposite guide plates, and the pore canal formed by the two guide plates is communicated with the opening of the first baffle 208.
Jet pipes 205 in all the reaction tanks 2 are connected to a main water supply pipe 204, which communicates with a water supply pipe 212.
The bottom of the U-shaped box body is connected with the reflux groove 207 through a drain pipe 213; the top of the reflux groove 207 is provided with a water supply pipe, the bottom is provided with a sewage discharge pipe 215, and the water supply pipe and the sewage discharge pipe 215 are provided with valves.
The water supply pipe 212 is communicated with the reflux groove 207, the reflux groove 207 is provided with a water supply pipeline, and the pipeline is provided with a water supply pipe valve 214. The top of the return channel 207 is also provided with an overflow pipe 216.
A plurality of stainless steel wire filter membranes 217 which are distributed at intervals are arranged in each U-shaped box body, and the meshes of two adjacent stainless steel wire filter membranes 217 are different; the surface of the stainless steel wire filter membrane 217 is provided with a titanium dioxide coating; from the inlet 206 to the outlet.
The final air outlet of the fume collecting hood 1 is connected with a purifying box, and the purifying box is filled with a reducing agent and a catalyst which can be oxidized by ozone.
Most of the structure of the device is detachable: the U-shaped box body is of a detachable structure, the stainless steel wire filter membrane is of a detachable structure, the ultraviolet lamp 202 is further covered with a detachable ultraviolet-transmitting shell, the first guide plate 208 and the second guide plate 209 are detachable, and the jet pipe 205 is detachable.
The equipment also comprises a necessary controller, preferably an automatic central controller, so as to control the opening and closing of the fan, the ultraviolet lamp and the humidifier; and corresponding indicator lamps are configured to indicate the working states of all the devices and play a role in warning.
The working process of the equipment is as follows:
the blower 6, the ultraviolet lamp 202, the jet pipe 205 and the water supply pipe 212 are started, the oil smoke is shunted into the right side box bodies of all the U-shaped box bodies under the limit of the fume collecting hood 1, the oil smoke is contacted with water emitted by the jet pipe 205 in an impinging stream mode, part of oil drops and VOC (volatile organic compounds) in the oil drops are collected in the liquid, and the oil drops flow into the reflux groove 207; the flue gas treated by the method continuously enters the left box body of the U-shaped box body and is subjected to fluidized oxidation reaction with hydroxyl free radicals, oil drops and VOC (volatile organic compounds) in the flue gas are degraded, and then the flue gas is finally discharged through adsorption reaction of a purifying box. In the above process, the water in the reflux tank 207 can be recycled, namely, pumped into the jet pipe 205 to continue the reaction; while the oil droplets accumulated in the backwater water are discharged from the drain pipe 215 at the bottom.
The gas distribution plate 201 in this embodiment may also have a structure as shown in fig. 10, and the stainless steel wire filter membrane 217 may have a structure as shown in fig. 11.
Example 3
A fluidized bed type fume treatment device has a structure shown in figure 8.
The device comprises a water atomizer 4, an ultraviolet lamp 202 and a fume collecting hood 1, wherein a reaction box 2 is arranged in the fume collecting hood 1, and the fume collecting hood 1 is in a cone shape with a small upper part and a large lower part.
The ultraviolet lamp 202 irradiates light with a wavelength of 185nm.
The reaction box 2 and the fume collecting hood 1 are connected into a whole by two layers of air deflectors 3, and the fume enters the reaction box 2 through the two layers of air deflectors 3; as shown in fig. 2, in the two layers of air deflectors 3, a plurality of air guiding holes are formed in each air deflector 3, the air guiding holes in the two adjacent layers of air deflectors 3 are distributed in an equidistant and staggered manner, and the two layers of air deflectors 3 are air channels 301 for oil smoke to circulate.
The fan controls the flue gas to enter the fume collecting hood 1 through the air guide holes on the air guide plate 3, so that the flue gas passes through the reaction box 2 and is finally discharged from the main air outlet pipe 5, and the fan can be arranged at the beginning end or the tail end of the main air outlet pipe 5.
Inside the reaction box 2, a water atomizer 4, an ultraviolet lamp 202, an air distribution plate 201 and two stainless steel wire filter membranes 217 are distributed in sequence from an air inlet to an air outlet; the air outlet of the reaction box 2 is plugged by a stainless steel wire filter membrane 217.
The mesh numbers of two adjacent stainless steel wire filter membranes 217 are different; the stainless steel wire filter membrane 217 has a titanium dioxide coating on its surface.
The final air outlet of the fume collecting hood 1 is connected with a purifying box, and the purifying box is filled with a reducing agent and a catalyst which can be oxidized by ozone.
Most of the structure of the device is detachable: the two layers of air deflectors 3 are detachable, the stainless steel wire filter membrane 217 is of a detachable structure, the ultraviolet lamp 202 is further covered with a detachable and ultraviolet-transmitting shell, and the oil drain groove 203 at the bottom of the reaction box 2 is detachable.
The equipment also comprises a necessary controller, preferably an automatic central controller, so as to control the opening and closing of the fan, the ultraviolet lamp and the humidifier; and corresponding indicator lamps are configured to indicate the working states of all the devices and play a role in warning.
The working process of the equipment is as follows:
the fan 6, the water atomizer 4 and the ultraviolet lamp 202 are started, the oil fume enters the reaction box 2 after passing through the air deflector 3 on the fume collecting hood 1 layer by layer, the oil fume passes through fluidized oxidation reaction in the reaction box 2, oil drops and VOC in the oil fume are degraded, and then the oil fume passes through adsorption reaction of the purification box and is finally discharged.
The gas distribution plate 201 in this embodiment may also have a structure as shown in fig. 10, and the stainless steel wire filter membrane 217 may have a structure as shown in fig. 11.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (27)
1. The fluidized bed type fume treatment equipment is characterized by comprising a fume collecting hood, a reaction box and a fan;
the fan controls the flue gas to enter the fume collecting hood and pass through the reaction box, and finally is discharged;
a humidifier, an ultraviolet lamp, a gas distribution plate and a stainless steel wire filter membrane are sequentially distributed in the reaction box along the discharge direction of the flue gas, and a flue gas outlet of the reaction box is sequentially blocked by the gas distribution plate and the stainless steel wire filter membrane; the gas distribution plate and the stainless steel wire filter membrane are renewable;
the humidifier is used for humidifying the gas entering the reaction box;
an ultraviolet lamp is arranged between the gas distribution plate and the stainless steel wire filter membrane;
the reaction box consists of a plurality of U-shaped box bodies which are arranged side by side;
the left side and the right side of each U-shaped box body are communicated through the bottom, and a smoke outlet of the smoke collecting cover is communicated with an air inlet of a right box body of the U-shaped box body;
the left box body of the U-shaped box body is provided with the ultraviolet lamp, the gas distribution plate and the stainless steel wire filter membrane, and the gas distribution plate and the stainless steel wire filter membrane sequentially block the air outlet of the left box body of the U-shaped box body;
an impinging stream component and the humidifier are arranged in the right box body of the U-shaped box body, and the humidifier is a jet pipe; the impinging stream assembly comprises from top to bottom: the first guide plate and the second guide plate; the jet pipe is arranged between the first guide plate and the second guide plate, the first guide plate is formed by splicing an arc-shaped plate and two flat plates, the two flat plates are respectively spliced at two sides of the arc-shaped plate, and an open cavity is formed between the two flat plates and the arc-shaped plate; the second guide plate consists of two guide plates which are oppositely arranged, and a pore canal formed by the two guide plates is communicated with the opening of the first guide plate;
the jet pipes in all the reaction boxes are connected with a water supply pipe;
the bottom of the U-shaped box body is communicated with a liquid box which is independently arranged.
2. The fluidized bed type oil fume treatment device according to claim 1, wherein the humidifier is a water atomizer.
3. The fluidized bed type fume treatment device according to claim 2, wherein the reaction box and the fume collecting hood are connected into a whole by two layers of air deflectors, and fume enters the reaction box through the two layers of air deflectors;
in the two layers of air deflectors, a plurality of air guide holes are formed in each air deflector, and the air guide holes in the two layers of air deflectors are distributed in a staggered mode.
4. A fluid bed fume treatment device according to claim 3, wherein the air guide holes on the two layers of air guide plates are distributed at equal intervals in a staggered manner.
5. A fluidized bed type fume treatment device according to claim 3, wherein the bottom of the reaction tank is provided with an oil drain groove.
6. A fluid bed fume treatment device according to claim 3, wherein the two layers of air deflectors are removable.
7. The fluidized bed type oil fume treatment device according to claim 1, wherein,
the top of the liquid tank is provided with a water supply pipe, the bottom of the liquid tank is provided with a drain pipe, and the water supply pipe and the drain pipe are both provided with valves.
8. The fluidized bed type oil fume treatment device according to any one of claims 1 to 7, wherein a plurality of groups of other stainless steel wire filter membranes which are sequentially and parallelly distributed along the fume outlet direction are further arranged between the air distribution plate and the stainless steel wire filter membranes.
9. The fluidized bed type oil fume treatment device according to claim 8, wherein one or more of all the stainless steel wire filter membranes are pleated stainless steel wire filter membranes.
10. The fluidized bed type fume treatment device according to claim 8, wherein an ultraviolet lamp is arranged between every two groups of the stainless steel wire filter membranes.
11. The fluidized bed type oil fume treatment device according to claim 8, wherein the surface of the stainless steel wire filter membrane is provided with a titanium dioxide coating.
12. The fluidized bed type oil fume treatment device according to claim 8, wherein the surface areas of the plurality of stainless steel wire filter sheets are sequentially increased from the air inlet to the air outlet.
13. The fluidized bed type oil fume treatment device according to claim 8, wherein the stainless steel wire filter membrane is a detachable structure.
14. The fluidized bed type oil fume treatment device according to claim 8, wherein the gas distribution plate is a detachable structure.
15. The fluidized bed type oil fume treatment device according to claim 8, wherein the reaction tank is a detachable structure.
16. The fluidized bed type oil fume treatment device according to claim 8, wherein the gas distribution plate is made of metal.
17. The fluid bed fume treatment device of claim 16, wherein the gas distribution plate is a uniform porous single plate.
18. The fluidized bed type oil fume treatment device according to claim 17, wherein the gas distribution plate is a single-layer metal woven plate woven by stainless steel wires.
19. The fluid bed fume treatment device of claim 1, wherein the fume collection hood is cone or tube shaped.
20. The fluidized bed type oil smoke treating apparatus according to any one of claims 1 to 7, wherein the wavelength of light irradiated by the ultraviolet lamp is 200nm or less.
21. The fluid bed fume treatment device of claim 20, wherein the ultraviolet lamp irradiates light at a wavelength of 185nm.
22. The fluid bed fume treatment device of claim 20, wherein the ultraviolet lamp housing has a removable and ultraviolet-transparent housing.
23. The fluidized bed type oil fume treatment device according to any one of claims 1 to 7, wherein an air outlet of the reaction box is connected with a purifying box, and the purifying box is filled with a reducing agent and a catalyst which can be oxidized by ozone.
24. The fluid bed fume treatment device of claim 23, further comprising a controller that controls the turning on and off of the blower, the ultraviolet lamp, the humidifier.
25. The fluid bed fume treatment device of claim 24, further comprising an indicator light, wherein the indicator light is coupled to the controller.
26. Use of a fluidized bed fume treatment device according to any one of claims 1-25, wherein the fluidized bed fume treatment device is used for the treatment of volatile organic compounds.
27. Use of a fluidized bed fume treatment device according to claim 26, characterized in that the fluidized bed fume treatment device is used for kitchen fume treatment, chemical plant exhaust gas treatment, sewage plant exhaust gas treatment, waste disposal site exhaust gas treatment or automobile exhaust gas treatment.
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| CN110354624B (en) * | 2019-07-25 | 2024-09-10 | 北京豪顺达不锈钢厨具制造有限公司 | Impinging stream type fluidized bed oil fume purifying equipment and reaction box thereof |
| CN110420519A (en) * | 2019-08-26 | 2019-11-08 | 北京豪顺达不锈钢厨具制造有限公司 | A kind of novel fluidized bed cooking fume control equipment |
| CN113769576A (en) * | 2021-09-16 | 2021-12-10 | 北京广大宏朗联拓科技有限公司 | Photocatalyst and photolysis combined type oil smoke purification and collection hood |
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