CN108844113A - A kind of fluidized bed type fume treating device and application thereof - Google Patents

Abstract

The invention provides a fluidized bed oil fume treatment device and its application. A fluidized bed oil fume treatment equipment, including a fume collection hood, a reaction box and a fan; the fan controls the flue gas to enter the fume collection hood and pass through the reaction box, and finally discharged; in the reaction box, along the The exhaust direction of the flue gas is sequentially distributed with a humidifier, an ultraviolet lamp, a gas distribution plate, and a stainless steel wire filter membrane. The smoke outlet of the reaction box is sequentially blocked by the gas distribution plate and the stainless steel wire filter membrane; The stainless steel wire filter membrane is preferably renewable; the humidifier is used to humidify the gas entering the reaction box. The present invention utilizes the oxidation reaction of OH and oil fume with high mass transfer coefficient to realize higher purification rate of oil fume.

Description

A kind of fluidized bed oil fume treatment equipment and its application

technical field

The invention relates to the field of mechanical technology, in particular to a fluidized bed oil fume treatment device and its application.

Background technique

The dietary structure of Chinese people is different from that of Westerners, and both the type of diet and cooking tools are very different from those of Western countries. In Chinese food processing, frying, frying, cooking, and deep-frying account for a large proportion, so the oily fume in the Chinese kitchen is very large, which easily makes the kitchen environment greasy and difficult to clean; at the same time, kitchen oily fume contains more than 300 harmful substances , have serious hazards to human health and the environment.

In terms of causes, kitchen fumes are mainly oily fumes produced during cooking oil and food heating. During the cooking process, the water foam in the dish vaporizes and expands rapidly, and part of it condenses into mist and oil fumes together to form visible oil fumes. The oil mist is mainly water mist, and only a small amount of oil gas and oil fume that are not infiltrated with the water mist are sandwiched in the upper part. In addition, the fume exhaust gas has some pungent taste.

From the point of view of form, oil fume exhaust gas includes grease particles, volatile organic compounds and gaseous pollutants, and the liquid has a high viscosity, and the peculiar smell is mainly caused by gaseous pollutants.

From the perspective of composition, the pollutants in kitchen fume mainly include oil droplets and carbon black particles, organic macromolecular particles and volatile organic compounds (VOCs) produced by incomplete combustion of fuel.

At present, the treatment equipment for kitchen fume exhaust gas at home and abroad mainly includes inertial separation, electrostatic deposition, membrane filtration and washing, etc., which are mainly used to remove particulate matter in kitchen oil mist, and have little effect on VOC removal. As people pay more and more attention to oil fume treatment, equipment for targeted removal of VOC has been developed. The principles used mainly include ultraviolet radiation or ozone oxidation and low-temperature plasma, but they are all low-efficiency equipment, and the effect achieved is not significant. , unable to meet the relevant emission standards, and the input and output do not match, and the cost performance is low. Take Beijing’s oil fume emission standard for the catering industry as an example, which requires that the oil in the fume discharged should be below 1 mg/m ³ , the content of particulate matter below 5 mg/m ³ , and the content of VOC below 10 mg/m ³ , while the existing Advanced purification equipment simply cannot meet this requirement stably for a long time.

In view of this, the present invention is proposed.

Contents of the invention

The purpose of the present invention is to provide a fluidized bed oil fume treatment equipment, which utilizes the principle of efficient oxidation reaction between hydroxyl radicals and oil fume under a fluidized bed reaction device, and improves the oil fume treatment efficiency. The removal rate of organic colloidal particles and VOC in the air is high, and it has the characteristics of explosion-proof, fire-proof, and no ignition energy.

In order to achieve the above object, the present invention provides the following technical solutions:

A fluidized bed oil fume treatment equipment,

Including fume collection hood, reaction box and fan;

The fan controls the flue gas to enter the fume collecting hood and pass through the reaction box, and finally be discharged;

In the reaction box, humidifiers, ultraviolet lamps, gas distribution plates, and stainless steel wire filter membranes are distributed sequentially along the exhaust direction of the flue gas. The smoke outlet of the reaction box is blocked by the gas distribution plate and stainless steel wire filter membranes in sequence. ; The gas distribution plate and the stainless steel wire filter membrane are preferably renewable;

The humidifier is used to humidify the gas entering the inside of the reaction box;

Preferably, an ultraviolet lamp is further provided between the air distribution plate and the stainless steel wire filter membrane.

The above-mentioned fluidized bed oil fume treatment equipment is mainly composed of three basic units, which provide the conditions for the generation of hydroxyl radicals and the fluidized reaction environment, and then realize the function of efficiently removing organic colloidal particles and VOC.

The three basic units include: a humidifier for water supply, a UV lamp for ultraviolet light, and an air distribution plate and stainless steel wire filter membrane for fluidization reactions.

In order to realize the efficient oxidation of oil fume 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.

For this reason, the present invention supplies hydroxyl radicals through two main channels: the one is to utilize water to produce a large amount of hydroxyl radicals under the irradiation of ultraviolet lamp, and reaction formula is as formula (1); The 2nd, the oxygen in air is irradiated by ultraviolet lamp Oxygen free radicals generated under the condition, oxygen free radicals react with water to generate hydroxyl free radicals, and the reaction formulas are as formulas (2) and (3).

H ₂ O+UV→·H+·OH Formula (1)

O ₂ +UV→2·O formula (2)

·O+H ₂ O→2·OH Formula (3)

The present invention provides an oxidation reaction device with a higher mass transfer coefficient through the structural design of the gas distribution plate and the stainless steel wire mesh filter membrane:

The reaction box of the present invention simulates the reaction principle of a fluidized bed, so that the reactants (including hydroxyl radicals and oily fume) are redistributed when passing through the gas distribution plate, so that part of the oily fume is not directly discharged into the channel without contact with OH. Atmosphere; after redistribution, OH and oil fume pass through the gas distribution plate, the substances to be oxidized in the oil fume (especially benzene and colloidal particles that are difficult to oxidize) are enriched on the stainless steel mesh filter membrane, At this time, the oily fume and OH produce boiling contact between the gas distribution plate and the stainless steel wire filter membrane, and carry out oxidation reaction with a large contact area and a long time.

It can be seen that due to the interception of OH and oily fume between the gas distribution plate and the stainless steel wire filter membrane, the two reactants stay here for a short time, and the particles and colloidal substances in the oily fume are filtered through the stainless steel wire filter. The surface of the membrane is enriched, so that the contact area between OH and oil fume is larger, and the residence time of the substance to be oxidized is prolonged, thereby prolonging the reaction time, that is, the mass transfer of the oxidation reaction is improved from both the reaction area and the reaction time system, and finally improve the purification efficiency. In addition, the stainless steel wire filter membrane also completed its own regeneration during the oxidation reaction.

In summary, the working process of the fluidized bed oil fume treatment equipment provided by the present invention is:

Under the action of the fan, the oil fume enters the fume collecting hood, and then enters the reaction box. At the same time, the humidifier humidifies the gas passing through the reaction box. At this time, under the irradiation of the ultraviolet lamp, the water is excited to produce OH, and part of the oxygen is also excited and released. Contact with water produces OH. Afterwards, the OH and oil fume pass through the gas distribution plate in the reaction box driven by the fan, and enter the area between the gas distribution plate and the stainless steel wire filter membrane after passing through the gas distribution. The compounds to be oxidized in the oil gas (especially difficult to Oxidized colloidal substances) are enriched on the stainless steel wire mesh filter membrane, and because there is a certain pressure drop here, the pressure drop forces the OH and the oil fume to be in a fluidized state in this area, and they are in boiling contact, resulting in a large Probabilistic radial mass transfer, and then full reaction, so that the organic matter in the oil fume is decomposed into CO ₂ and H ₂ O. In addition, since the stainless steel wire filter membrane is in a vibrating state all the time, the pores on it are not easily blocked by particles in the oil fume; it can be seen that the present invention not only avoids the problem that the purification efficiency is greatly reduced due to the blockage of the pores after a short period of use. problem, and by increasing the mass transfer coefficient of hydroxyl radicals and oil fume reaction, the degradation rate of pollutants is improved to meet the emission requirements.

In addition, since oxygen is easily generated spontaneously, O will preferentially combine with O ₂ to generate O ₃ (such as reaction formula (4)), and the oxidation of O ₃ to VOC is much lower than that of OH. Therefore, in practical applications, in order to reduce the yield of ozone, a high-humidity environment is formed inside the reaction chamber before the oil fume enters the reaction chamber.

·O+O ₂ →O ₃ Formula (4)

As mentioned above, the main purpose of the present invention is to decompose volatile organic compounds or oil fume organic colloidal particles, so its application field is very wide, not limited to kitchen oil fume treatment, but also includes chemical plant tail gas treatment , Exhaust gas treatment of sewage plants, exhaust gas treatment of garbage disposal sites or automobile exhaust treatment.

Although the chemical reaction principle utilized in the present invention is very common, especially in sewage treatment, similar to the Fenton reaction, it has the ability to purify organic compounds with high efficiency and broad spectrum, but the present invention overcomes many difficulties in realizing this type of oxidation reaction, include:

(1) How to achieve continuous purification treatment without affecting the operation of exhausting the source of oil fume, and at the same time realize the regeneration of the membrane body and improve the adaptability of the equipment;

(2) How to integrate the purification system with the flue gas discharge system, and reduce the equipment's occupied space, operation and manufacturing costs, etc.;

(3) How to efficiently generate a large amount of OH;

(4) How to degrade and remove VOCs with broad spectrum and high efficiency.

On the basis of the above core structure, the mechanical structure of the device of the present invention can be further improved, specifically as follows.

Preferably, the air distribution plate and the stainless steel wire filter membrane are preferably renewable; in order to realize the long-term continuous use of the equipment, the service life of the equipment is longer when both are made of stainless steel.

Preferably, an ultraviolet lamp is further provided between the air distribution plate and the stainless steel wire filter membrane.

Adding ultraviolet lamps in this area can increase the production of OH, improve oxidation efficiency and degradation ability.

Preferably, the humidifier is a water atomizer.

In addition, the humidifier used in this solution is a water atomizer, so the water in the reaction tank is in the state of water vapor, which will not cause runoff problems, so there is no need to set up a special liquid tank and water return device.

Preferably, the reaction box and the fume collecting hood are connected as a whole by two layers of wind deflectors, and the smoke enters the reaction box through the two layers of wind deflectors;

In the two layers of air deflectors, each of the air deflectors is provided with a plurality of air guide holes, and the air guide holes on the two layers of air deflectors are dislocated.

Integrating the reaction box and the fume collection hood has many advantages:

(1) Reduce the size of the equipment;

(2) Shorten the oil fume channel, more energy-saving and efficient;

(3) Small changes to the structure of traditional oil fume purification equipment are more conducive to product upgrades. Usually, only the internal structure of the fume collection hood or a certain side plate needs to be modified, that is, the present invention and traditional oil fume purification equipment can share the same fume collection hood;

(4) The dislocation distribution of the air guide holes on the two adjacent air guide plates can avoid the leakage of ultraviolet light and cause harm to the human body.

Preferably, the air guide holes on two adjacent layers of air guide plates are equally spaced and misplaced, so that impact flow can be generated, granulation is performed, and the purification rate of oil fume is improved.

Preferably, an oil drainage tank is provided at the bottom of the reaction box.

The oil drain can collect the backflow of oil for easy cleaning.

Preferably, the two layers of wind deflectors are detachable for cleaning and maintenance.

Preferably, the water spray nozzle of the water atomizer is made of ceramic material, on the one hand to avoid scale blocking the outlet, and on the other hand to avoid the electron interference generated by the metal to interfere with the generation of ·OH.

Preferably, the reaction box is composed of multiple U-shaped boxes side by side;

The left and right sides of each U-shaped box are connected through the bottom, and the smoke outlet of the smoke collecting hood communicates with the air inlet of the right box of the U-shaped box;

The left box of the U-shaped box 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 U-shaped The air outlet of the box on the left side of the box;

The box on the right side of the U-shaped box is provided with an impingement flow assembly and the humidifier, and the humidifier is a jet tube; the impingement flow assembly includes from top to bottom: a first deflector, a second deflector; the jet tube is provided between the first deflector and the second deflector, and the first deflector is formed by splicing an arc-shaped plate and two flat plates, and The two flat plates are respectively spliced on both 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 is composed of two oppositely arranged guide plates Composition, the holes formed by the two guide plates facing each other communicate with the opening of the first guide plate;

The jet tubes in all reaction boxes are connected to water supply tubes.

The bottom of the U-shaped box communicates with an independently arranged liquid tank.

Compared with the above-mentioned one-piece structure scheme, this scheme adds pre-treatment equipment, which is suitable for the environment with large oil fume discharge.

The structure includes a pretreatment process, which is mainly completed in the right box of the U-shaped box. The right box is multifunctional and has at least the following functions.

(1) Provide water for the formation of hydroxyl radicals in the left box by means of jet tube humidification, and provide high-humidity oil fume.

(2) Pre-treatment of the oil fume by using the impingement flow: the oil fume and the water collide in the impact area formed by the first deflector and the second deflector, and come into deep contact. Due to the light weight of the gas, the field energy at the time of impact is small, the forward flow penetrates into the reverse flow, and at the same time, the reverse flow penetrates into the forward flow, and the gas produces an oscillating motion, which increases the size of the oil droplets in the flue gas, completes the granulation process, and is enriched at the same time. Collected in water and flow into the reflux tank; due to the large mass of the liquid, the field energy is large when it hits, and some liquid molecules form a polarization phenomenon; the oil droplets and solid particles in the smoke will move toward the polarized water molecules, resulting in absorption , Adsorption, through physical sedimentation, oil droplets and particles are enriched in the liquid tank. It can be seen that the right box of the U-shaped box can remove part of the oil droplets and VOC in the oil fume, complete the pretreatment process, and reduce the burden on the degradation process of hydroxyl radicals in the left box.

(3) The impinging water flow generated by the jet tube can absorb a large amount of heat, reduce the temperature in the kitchen or other operating rooms, and fundamentally eliminate the possibility of fire in the flue.

Preferably, the top of the liquid tank is provided with a water supply pipe, and the bottom is provided with a sewage discharge pipe, and both the water supply pipe and the sewage discharge pipe are provided with valves.

The above-mentioned structure is convenient for controlling sewage discharge or drainage according to the pollution degree and water volume of the return water.

Preferably, the water supply pipe communicates with the liquid tank.

Connecting the water supply pipe with the liquid tank can recycle water, save energy and reduce emissions.

Preferably, between the air distribution plate and the stainless steel wire filter membrane, there are multiple groups of other stainless steel wire filter membranes distributed in parallel along the direction of the smoke outlet; this can increase the time for the oil fume to react with hydroxyl radicals, further Improve the mass transfer coefficient and improve the purification effect.

Preferably, one or more groups of all the stainless steel wire filter membranes are pleated stainless steel wire filter membranes; the pleated stainless steel wire filter membranes have a large surface area, which is more conducive to the deep degradation of oil fume.

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.

Under the action of ultraviolet light, titanium dioxide will generate photoholes and photoelectrons, and has a strong redox ability, which can remove formaldehyde, toluene, xylene, ammonia, radon, VOC and other harmful organic substances, pollutants, odors, bacteria, viruses, etc. Harmful organic substances such as microorganisms and microorganisms are partially decomposed into harmless CO ₂ and H ₂ O. It also has the characteristics of removing pollutants, hydrophilicity, and self-cleaning properties. It has long-lasting performance and does not produce secondary pollution. Therefore, the titanium dioxide coating on the stainless steel wire filter membrane can protect the stainless steel wire filter membrane from pollution on the one hand, and increase the degradation rate of VOC on the other hand, improving the purification effect.

Preferably, from the air inlet to the air outlet, the surface areas of the plurality of stainless steel wire filter membranes increase sequentially.

At this time, as the oil fume is discharged outwards, the contact area with OH becomes larger and the reaction becomes more and more thorough, especially when the reaction progresses to the later stage, the chemical reaction balance will move in reverse, at this time through Increasing the area of the wire mesh increases the contact area, which is beneficial to the positive movement of the balance.

Preferably, the stainless steel wire filter membrane is a detachable structure for cleaning and maintenance.

Preferably, the air distribution plate is a detachable structure for cleaning and maintenance.

Preferably, the reaction box is a detachable structure for cleaning and maintenance.

Preferably, an ultraviolet lamp is arranged between each two sets of stainless steel wire filter membranes.

Preferably, the wavelength of light irradiated by the ultraviolet lamp is below 200nm, preferably 185nm.

H ₂ O and O ₂ can be fully excited to generate ·OH at the above wavelengths.

Preferably, in the actual processing equipment, it is also necessary to consider the setting of the switch of the ultraviolet lamp and the monitoring and other supporting parts (ballast, indicator light, etc.), which are usually set as a structure for easy operation or automatic control.

Preferably, a controller is also included, and the controller controls the opening and closing of the fan, the ultraviolet lamp, and the humidifier.

Preferably, an indicator light is also included, and the indicator light is connected with the controller.

Preferably, the ultraviolet lampshade has a detachable and ultraviolet-permeable shell to protect the ultraviolet light from being polluted by oil stains.

Preferably, the air outlet of the reaction box is connected with a purification box, and the purification box is filled with a reducing agent and a catalyst capable of being oxidized by ozone.

The reducing agent in the purification box can remove ozone and avoid being discharged into the air to pollute the environment.

Preferably, the shape and structure of the fume collecting hood of the present invention are not limited, and may be conventional top-suction or side-suction, or other structures with better effects (including structures to be developed in the future).

Preferably, the fume collecting hood is in the shape of a cone or a tube. The cone is usually a structure with a small top and a large bottom, which is a conventional shape in the field, and this shape is more common in kitchens.

In the present invention, the position of the fan is not limited, and it can be arranged at the beginning or end of the main air duct.

In summary, compared with the prior art, the present invention achieves the following technical effects:

(1) Fluidized bed oil fume treatment equipment uses the oxidation reaction of OH and high mass transfer coefficient of oil fume to improve the purification rate of oil fume, and is more suitable for production or living environments with large amount of smoke exhaust;

(2) Design the various parts of the fluidized bed oil fume treatment equipment into a detachable structure, which is more convenient for cleaning and maintenance;

(3) The present invention increases ozone absorption device, has avoided the negative effect that equipment produces to environment;

(4) Fluidized bed oil fume treatment equipment has a wide range of uses and is suitable for the treatment of various volatile organic compounds, such as kitchen oil fume treatment, tail gas treatment of chemical plants, tail gas treatment of sewage plants or tail gas treatment of garbage disposal sites, etc.;

(5) At the same time, the device can physically enrich a part of the non-organic particulate matter in the gas through the gas distribution plate, especially the stainless steel filter membrane, to complete the purification of the particulate matter.

Description of drawings

In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

Figure 1 is a side view of the fluidized bed oil fume treatment equipment provided in Example 1 of the present invention;

Fig. 2 is the A-A sectional view of the wind deflector in Fig. 1;

Fig. 3 is a three-dimensional schematic diagram of the wind deflector in Fig. 1;

Fig. 4 is a front view of the fluidized bed oil fume treatment equipment provided in Example 1 of the present invention;

Fig. 5 is a front view of the fluidized bed oil fume treatment equipment provided in Example 1 of the present invention;

Fig. 6 is a side view of the fluidized bed oil fume treatment equipment provided by Embodiment 2 of the present invention;

Fig. 7 is a front view of the fluidized bed oil fume treatment equipment provided in Example 2 of the present invention;

Fig. 8 is a side view of the fluidized bed oil fume treatment equipment provided by Embodiment 3 of the present invention;

Fig. 9 is a side view of another fluidized bed fume treatment device provided by the present invention;

Fig. 10 is a schematic structural view of the air distribution plate provided by the present invention;

Fig. 11 is the structural representation of the stainless steel wire filter membrane provided by the present invention;

Reference signs:

1-fume collecting hood, 2-reaction box, 3-wind deflector, 4-water atomizer, 5-main air outlet pipe, 6-fan,

201-air distribution plate, 202-ultraviolet lamp, 203-oil drain tank, 204-main water pipe, 205-jet pipe, 206-air inlet, 207-reflux tank, 208-first deflector, 209-second guide Flow plate, 210-ballast, 211-indicator, 212-water supply pipe, 213-drainage pipe, 214-upper water pipe valve, 215-drainage pipe, 216-overflow pipe, 217-stainless steel wire filter membrane, 218- handle, 219-removable access panel, 220-indicator light,

301 - wind tunnel.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, but those skilled in the art will understand that the embodiments described below are some of the embodiments of the present invention, rather than all of them. It is only used to illustrate the present invention and should not be construed as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. Those who do not indicate the specific conditions in the examples are carried out according to the conventional conditions or the conditions suggested by the manufacturer. The reagents or instruments used were not indicated by the manufacturer, and they were all conventional products that could be purchased from the market.

Example 1

A fluidized bed oil fume treatment device, the structure of which is shown in Figures 1 to 5.

It includes a water atomizer 4, an ultraviolet lamp 202, a fume collecting hood 1 and a fan 6, the fume collecting hood 1 is connected to the reaction box 2, and the fume collecting hood 1 is in the shape of a cone with a small top and a big bottom.

The wavelength of light irradiated by the ultraviolet lamp 202 is 185nm.

The reaction box 2 and the smoke collecting hood 1 are connected as a whole by two layers of wind deflectors 3, and the smoke enters the reaction box 2 through the two layers of wind deflectors 3; as shown in Figures 2 and 3, in the two layers of wind deflectors 3, each A plurality of air guide holes are provided on each air guide plate 3, and the air guide holes on two adjacent layers of air guide plates 3 are equidistantly distributed, and between the two layers of air guide plates 3 is an air duct 301 for the circulation of oily smoke. .

The blower 6 controls the flue gas to enter the fume collecting hood 1 through the air guide holes on the air guide plate 3 , pass through the reaction box 2 , and finally be discharged from the main air outlet pipe 5 .

Inside the reaction box 2, from the direction of the air inlet 206 to the air outlet, the water atomizer 4, the ultraviolet lamp 202, the gas distribution plate 201, and two stainless steel wire filter membranes 217 are distributed in sequence; the air outlet of the reaction box 2 is made of stainless steel The silk filter membrane 217 is blocked.

The mesh numbers of the two adjacent stainless steel wire filter membranes 217 are different; the surfaces of the stainless steel wire filter membranes 217 are provided with titanium dioxide coating; from the air inlet 206 to the air outlet, the surface area of multiple stainless steel wire filter membranes 217 increases sequentially. The shape of the stainless steel wire filter membrane 217 is as shown in FIG. 11 , which is pleated.

The bottom of the reaction box 2 is provided with an oil discharge tank 203 .

The final air outlet of the fume collecting hood 1 is connected with a purification box, and the purification box is filled with reducing agents and catalysts that can be oxidized by ozone.

Most of the structure of the equipment is detachable: the two-layer wind deflector 3 is detachable, the stainless steel wire filter membrane 217 is a detachable structure, the ultraviolet lamp 202 is also covered with a detachable and ultraviolet-permeable shell, and the bottom of the reaction box 2 The oil drain 203 is detachable.

The equipment also includes necessary controllers. It is advisable to choose an automated central controller to control the opening and closing of fans, ultraviolet lamps, and humidifiers; at the same time, corresponding indicator lights 220 are configured to indicate the working status of all equipment and play a warning role. The casing of the device is provided with a detachable access panel 219 .

The working process of the above-mentioned equipment is:

Start the blower fan 6, the water atomizer 4 and the ultraviolet lamp 202, and the oil fume enters the reaction box 2 after passing through the wind deflector 3 on the fume collecting hood 1 layer by layer, and the oil fume passes through a fluidized oxidation reaction in the reaction box 2, wherein The oil droplets and VOC are degraded, then go through the adsorption reaction of the purification box, and finally discharged. During this process, the oil droplets flowing back in the reaction tank 2 flow into the oil discharge tank 203, and are regularly dumped and cleaned.

In addition, in this embodiment, additional layers of stainless steel wire filter membranes 217 can be added, and ultraviolet lamps can be arranged between every two layers of stainless steel wire filter membranes 217, as shown in FIG. 9 . As shown in FIG. 10 , the air distribution plate 201 can be made of a woven plate made of stainless steel wire mesh, and a handle 218 can be added below it to facilitate disassembly and maintenance.

Example 2

A fluidized bed oil fume treatment device, the structure of which is shown in Figures 6 and 7.

Including humidifier, ultraviolet lamp 202, fume collecting hood 1 and fan 6, fume collecting hood 1 is connected with reaction box 2; . The wavelength of light irradiated by the ultraviolet lamp 202 is 185nm. The ultraviolet lamp 202 is provided with accessory parts such as a ballast 210 and an indicator light 211 .

The reaction box 2 is composed of a plurality of units, that is, a plurality of U-shaped boxes arranged side by side.

The left and right sides of each U-shaped box are connected through the bottom, and the smoke outlet of the smoke collecting hood 1 communicates with the air inlet 206 of the right box of the U-shaped box.

The left side casing of U-shaped casing is provided with ultraviolet lamp 202, air distribution net 201 and stainless steel wire filter membrane 217, and stainless steel wire filter membrane 217 blocks the air outlet of the left side casing of U-shaped casing.

The box body on the right side of the U-shaped box is provided with an impingement flow assembly and a humidifier, and the humidifier is a jet tube 205; the impingement flow assembly includes from top to bottom: a first deflector 208, a second deflector 209; A jet tube 205 is arranged between a deflector 208 and a second deflector 209. The first deflector 208 is formed by splicing an arc-shaped plate and two flat plates, and the two flat plates are respectively spliced on the sides of the arc-shaped plate. On both sides, an open cavity is formed between the two flat plates and the arc-shaped plate; connected.

The jet pipes 205 in all the reaction tanks 2 are connected to the main water supply pipe 204 , which communicates with the water supply pipe 212 .

The bottom of the U-shaped box is connected with the return tank 207 through the drain pipe 213; the top of the return tank 207 is provided with an upper water pipe, and the bottom is provided with a sewage discharge pipe 215, and the upper water pipe and the sewage discharge pipe 215 are all provided with valves.

The water supply pipe 212 communicates with the return tank 207, and the return tank 207 is provided with a water supply pipeline, and the pipeline is provided with a water supply pipe valve 214. An overflow pipe 216 is also provided on the top of the reflux tank 207 .

In each U-shaped box, there are a plurality of stainless steel wire filter membranes 217 distributed at intervals, and the meshes of two adjacent stainless steel wire filter membranes 217 are different; the surface of the stainless steel wire filter membranes 217 is provided with a titanium dioxide coating; The tuyere 206 is to the air outlet.

The final air outlet of the fume collecting hood 1 is connected with a purification box, and the purification box is filled with reducing agents and catalysts that can be oxidized by ozone.

Most of the structure of the equipment is detachable: the U-shaped box is a detachable structure, the stainless steel wire filter membrane is a detachable structure, the ultraviolet lamp 202 is also covered with a detachable and ultraviolet-permeable shell, the first deflector 208 and The second deflector 209 is detachable, and the jet tube 205 is detachable.

The equipment also includes necessary controllers. It is advisable to choose an automated central controller to control the opening and closing of fans, ultraviolet lamps, and humidifiers; at the same time, it is equipped with corresponding indicator lights to indicate the working status of all equipment and play a warning role.

The working process of the above-mentioned equipment is:

Start the fan 6, the ultraviolet lamp 202, the jet tube 205, and the water supply tube 212, and the oil fume will flow into the right box of all U-shaped boxes under the limit of the fume collecting hood 1, and the oil fume will collide with the water ejected from the jet tube 205. Part of the oil droplets and VOC are collected in the liquid and flow into the reflux tank 207; the flue gas after the above treatment continues to enter the left box of the U-shaped box, and undergoes fluidized oxidation with hydroxyl radicals reaction, the oil droplets and VOC in it are degraded, and then go through the adsorption reaction of the purification box, and finally discharged. During the above process, the water in the reflux tank 207 can be recycled, that is, pumped into the jet pipe 205 to continue the reaction; while the oil droplets accumulated in the reflux water are discharged from the sewage pipe 215 at the bottom.

The gas distribution plate 201 in this embodiment can also adopt the structure shown in FIG. 10 , and the stainless steel wire filter membrane 217 can adopt the structure shown in FIG. 11 .

Example 3

A fluidized bed oil fume treatment equipment, the structure is shown in Figure 8.

It includes a water atomizer 4, an ultraviolet lamp 202, and a fume collecting hood 1. A reaction box 2 is arranged inside the fume collecting hood 1. The fume collecting hood 1 is in the shape of a cone with a small top and a big bottom.

The wavelength of light irradiated by the ultraviolet lamp 202 is 185nm.

The reaction box 2 and the smoke collecting hood 1 are connected as a whole by two layers of wind deflectors 3, and the smoke enters the reaction box 2 through the two layers of wind deflectors 3; as shown in Figure 2, in the two layers of wind deflectors 3, each A plurality of air guide holes are provided on the air guide plate 3 , and the air guide holes on two adjacent layers of air guide plates 3 are equidistantly distributed.

The fan controls the flue gas to enter the fume collecting hood 1 through the air guide hole on the air deflector 3, pass through the reaction box 2, and finally be discharged from the main air outlet pipe 5, and the fan can be arranged at the beginning or end of the main air outlet pipe 5.

Inside the reaction box 2, from the air inlet to the air outlet, the water atomizer 4, the ultraviolet lamp 202, the air distribution plate 201, and two stainless steel wire filter membranes 217 are distributed in sequence; the air outlet of the reaction box 2 is made of stainless steel wire The filter membrane 217 is blocked.

The mesh numbers of the two adjacent stainless steel wire filter membranes 217 are different; the surfaces of the stainless steel wire filter membranes 217 are provided with titanium dioxide coating.

The final air outlet of the fume collecting hood 1 is connected with a purification box, and the purification box is filled with reducing agents and catalysts that can be oxidized by ozone.

Most of the structure of the equipment is detachable: the two-layer wind deflector 3 is detachable, the stainless steel wire filter membrane 217 is a detachable structure, the ultraviolet lamp 202 is also covered with a detachable and ultraviolet-permeable shell, and the bottom of the reaction box 2 The oil drain 203 is detachable.

The equipment also includes necessary controllers. It is advisable to choose an automated central controller to control the opening and closing of fans, ultraviolet lamps, and humidifiers; at the same time, it is equipped with corresponding indicator lights to indicate the working status of all equipment and play a warning role.

The working process of the above-mentioned equipment is:

Start the blower fan 6, the water atomizer 4 and the ultraviolet lamp 202, and the oily fume enters the reaction box 2 after passing through the wind deflector 3 on the fume collecting hood 1 layer by layer, and the oily fume passes through a fluidized oxidation reaction in the reaction box 2, wherein The oil droplets and VOC are degraded, then go through the adsorption reaction of the purification box, and finally discharged.

The gas distribution plate 201 in this embodiment can also adopt the structure shown in FIG. 10 , and the stainless steel wire filter membrane 217 can adopt the structure shown in FIG. 11 .

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (10)

1. A fluidized bed oil fume treatment device, characterized in that it comprises a fume collecting hood, a reaction box and a blower fan; The fan controls the flue gas to enter the fume collecting hood and pass through the reaction box, and finally be discharged; In the reaction box, humidifiers, ultraviolet lamps, gas distribution plates, and stainless steel wire filter membranes are distributed sequentially along the exhaust direction of the flue gas. The smoke outlet of the reaction box is blocked by the gas distribution plate and stainless steel wire filter membranes in sequence. ; The gas distribution plate and the stainless steel wire filter membrane are preferably renewable; The humidifier is used to humidify the gas entering the inside of the reaction box; Preferably, an ultraviolet lamp is further provided between the air distribution plate and the stainless steel wire filter membrane. 2. The fluidized bed oil fume treatment equipment according to claim 1, characterized in that the humidifier is a water atomizer. 3. The fluidized bed oil fume treatment equipment according to claim 2, characterized in that, the reaction box and the fume collecting hood are connected as a whole by two layers of air deflectors, and the flue gas passes through the two layers of air guides the plate enters the reaction box; In the two layers of air deflectors, each of the air deflectors is provided with a plurality of air guide holes, and the air guide holes on the two layers of air deflectors are dislocated, preferably equally spaced and dislocated; Preferably, the bottom of the reaction box is provided with an oil drain; Preferably, the two layers of wind deflectors are detachable. 4. The fluidized bed oil fume treatment equipment according to claim 1, wherein the reaction box is composed of a plurality of U-shaped boxes side by side; The left and right sides of each U-shaped box are connected through the bottom, and the smoke outlet of the smoke collecting hood communicates with the air inlet of the right box of the U-shaped box; The left box of the U-shaped box 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 U-shaped The air outlet of the box on the left side of the box; The box on the right side of the U-shaped box is provided with an impingement flow assembly and the humidifier, and the humidifier is a jet tube; the impingement flow assembly includes from top to bottom: a first deflector, a second deflector; the jet tube is provided between the first deflector and the second deflector, and the first deflector is formed by splicing an arc-shaped plate and two flat plates, and The two flat plates are respectively spliced on both 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 is composed of two oppositely arranged guide plates Composition, the holes formed by the two guide plates facing each other communicate with the opening of the first guide plate; The jet pipes in all reaction boxes are connected with water supply pipes; The bottom of the U-shaped box communicates with an independently arranged liquid tank. 5. The fluidized bed oil fume treatment equipment according to claim 4, characterized in that, The top of the liquid tank is provided with a water supply pipe, and the bottom is provided with a sewage discharge pipe, and both the water supply pipe and the sewage discharge pipe are provided with valves. 6. The fluidized bed oil fume treatment equipment according to any one of claims 1-5, characterized in that, between the air distribution plate and the stainless steel wire filter membrane, there are multiple sets of Other stainless steel wire filter membranes distributed in parallel in turn; Preferably, one or more groups of all the stainless steel wire filter membranes are pleated stainless steel wire filter membranes; 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; Preferably, from the air inlet to the air outlet, the surface area of the plurality of stainless steel wire filter membranes increases sequentially; Preferably, the stainless steel wire filter membrane is a detachable structure; Preferably, the air distribution plate is a detachable structure; Preferably, the reaction box is a detachable structure; Preferably, the air distribution board is made of metal, preferably a uniform and porous single-layer board, preferably a single-layer metal woven board woven with stainless steel wires. 7. The fluidized bed oil fume treatment equipment according to claim 1, characterized in that, the fume collecting hood is conical or tubular. 8. The fluidized bed oil fume treatment equipment according to any one of claims 1-5, characterized in that, the wavelength of light irradiated by the ultraviolet lamp is below 200nm, preferably 185nm; Preferably, the ultraviolet lampshade has a detachable outer shell transparent to ultraviolet rays. 9. The fluidized bed oil fume treatment equipment according to any one of claims 1-5, characterized in that, the air outlet of the reaction box is connected with a purification box, and the purification box is filled with ozone-oxidizable Reductant and catalyst; Preferably, a controller is also included, the controller controls the opening and closing of the fan, the ultraviolet lamp, and the humidifier; Preferably, an indicator light is also included, and the indicator light is connected with the controller. 10. The purposes of the fluidized bed oil fume treatment equipment described in claims 1-9, characterized in that the fluidized bed oil fume treatment equipment is used for the treatment of volatile organic compounds, preferably kitchen oil fume treatment, chemical plant Exhaust gas treatment, exhaust gas treatment of sewage plant, exhaust gas treatment of garbage disposal site or automobile exhaust treatment.