WO2024051629A1 - Appareil de purification de gaz résiduaire de fumée d'huile basée sur corona et une atomisation et procédé de purification - Google Patents

Appareil de purification de gaz résiduaire de fumée d'huile basée sur corona et une atomisation et procédé de purification Download PDF

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Publication number
WO2024051629A1
WO2024051629A1 PCT/CN2023/116668 CN2023116668W WO2024051629A1 WO 2024051629 A1 WO2024051629 A1 WO 2024051629A1 CN 2023116668 W CN2023116668 W CN 2023116668W WO 2024051629 A1 WO2024051629 A1 WO 2024051629A1
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WO
WIPO (PCT)
Prior art keywords
oil fume
corona
exhaust gas
mesh
gas purification
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PCT/CN2023/116668
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English (en)
Chinese (zh)
Inventor
张星
迟玉斌
于海波
吴金鑫
彭源
张记锁
李海龙
尹博
戴杰
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苏州科技大学
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Publication of WO2024051629A1 publication Critical patent/WO2024051629A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
    • B03C3/0175—Amassing particles by electric fields, e.g. agglomeration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06—Spray cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D51/00—Auxiliary pretreatment of gases or vapours to be cleaned
    • B01D51/02—Amassing the particles, e.g. by flocculation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/01—Pretreatment of the gases prior to electrostatic precipitation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0275—Other waste gases from food processing plants or kitchens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases
    • 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
    • Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust

Definitions

  • Embodiments of the present invention relate to the technical field of air pollution control, and in particular to an atomized corona oil fume exhaust gas purification device and a purification method.
  • the corona discharge components cannot rotate, and oil fume particles are easily deposited on the corona discharge components, resulting in poor treatment efficiency and even requiring regular cleaning of the corona discharge components. part.
  • the object of the present invention is to provide an atomized corona oil fume exhaust gas purification device and a purification method that can efficiently purify oil fume.
  • the technical solution of the present application organically combines the advantages of the electrocoagulation and coagulation component as an electrocoagulation and processing module, the atomizing nozzle and the dynamic cage-type corona discharge component that work together to produce an atomizing corona treatment effect and can be self-cleaning. And the dynamic adsorption plate can rotate to achieve self-cleaning effect. In this way, the oil fume exhaust gas purification device and purification method of the present application can not only maintain a very high treatment effect, but also achieve a self-cleaning function, avoiding the effect of frequent cleaning of internal parts.
  • an atomized corona oil fume exhaust gas purification device is provided.
  • the two ends of the housing of the atomization corona oil fume exhaust gas purification device are respectively provided with air inlets and air outlets, and are provided with an air inlet and an air outlet in the housing.
  • the electrocoagulation and merging component is configured to cause the oil fume particles in the oil fume exhaust gas to be charged, coagulated and agglomerated;
  • An atomizing corona rotating component includes a water passing shaft, atomizing nozzles located at intervals on the water passing shaft, and a plurality of discharge electrodes arranged in a twisted cage shape on the surface of the water passing shaft, so The plurality of discharge electrodes rotate to throw the oil fume particles that have undergone atomization corona treatment onto the inner wall of the housing; and
  • the dynamic adsorption plate includes a rotating adsorption plate, and the adsorption plate throws at least part of the remaining oil fume particles onto the inner wall of the housing.
  • a purification method using the above-mentioned atomized corona oil fume exhaust gas purification device including the following steps:
  • the oil fume exhaust gas to be purified enters the housing from the air inlet;
  • the oil fume particles in the oil fume exhaust gas are charged, coagulated and agglomerated through electrocoagulation components;
  • the oil fume exhaust gas treated by the electrocoagulation component is sucked in and forms a first vortex that rotates counterclockwise or clockwise, and the oil fume particles in the first vortex are processed between the atomizing nozzle and the discharge electrode. After the atomization power supply is processed, it is thrown onto the inner wall of the housing;
  • the adsorption plate in the dynamic adsorption plate rotates to form a second vortex in the opposite direction to the first vortex. At least a part of the remaining oil fume particles are adsorbed by the adsorption plate and then thrown onto the inner wall of the housing.
  • the first form of electrocoagulation component can be set up as follows:
  • the electrocoagulation and combining component includes an airflow mesh plate and a plurality of universal wire drawing conductors arranged on the airflow mesh plate, wherein the airflow mesh plate is provided with a plurality of airflow meshes, and adjacent airflow meshes are There are universal wire drawing conductors between them.
  • the air flow mesh is arranged on the air flow mesh plate into multiple exhaust flow meshes, and the air flow meshes between each exhaust flow mesh are spaced apart.
  • a universal wire drawing conductor is provided in the central area of the four air flow meshes between two adjacent rows of air flow meshes, and the plurality of universal wire drawing conductors are connected by conductive wires.
  • the airflow mesh is in a circular, oval or rectangular shape, and the universal wire drawing conductor is in a four-pointed star shape.
  • Two adjacent rows of universally drawn wire conductors are connected to the high-voltage pole and the ground electrode of the AC high-voltage power supply respectively; the shape of the universally drawn wire conductor made of tungsten wire, steel wire or burr is sawtooth, needlepoint, spike, or thorn-like thorn. Rope or wire mesh.
  • the second form of electrocoagulation component can be set as follows:
  • the electrocoagulation and combining component includes an airflow mesh plate and a plurality of universal filament conductors arranged on the airflow mesh plate, wherein the airflow mesh plate is provided with a plurality of airflow meshes, and each airflow mesh hole Universal drawn filament conductors are provided.
  • the air flow mesh is arranged on the air flow mesh plate into multiple exhaust flow meshes, and the air flow meshes between each exhaust flow mesh are spaced apart.
  • a universal filament conductor is provided in the central area of each airflow mesh, and multiple universal filament conductors are connected by conductive wires.
  • the airflow mesh is in a circular, elliptical or rectangular shape, and the universal drawn filament conductor is in a center emitting shape.
  • Two adjacent rows of universal filament conductors are respectively connected to the high-voltage pole and the ground pole of the AC high-voltage power supply.
  • Universal drawn filament conductors made of tungsten wire, steel wire or barbed wire are in the shape of sawtooth, needle point, spike, thorn barbed wire or wire mesh.
  • the third form of electrocoagulation component can be set as follows:
  • the electrocoagulation and combining component includes an airflow mesh plate and a plurality of universal filigree conductors arranged on the airflow mesh plate, wherein the airflow mesh plate is provided with a plurality of airflow meshes, and the airflow meshes are provided with The universal drawn wire conductor is provided with a vent hole.
  • the air flow mesh is arranged on the air flow mesh plate into multiple exhaust flow meshes, and the air flow meshes between each exhaust flow mesh are spaced apart.
  • a universal drawn filament conductor is provided in the center area of each airflow mesh, and a ventilation hole is provided in each universal drawn filament conductor.
  • the plurality of universal drawn filament conductors are connected by conductive wires.
  • the airflow mesh is in a circular, oval or rectangular shape
  • the universal drawn wire conductor is in an annular shape with a plurality of uniformly arranged discharge wires
  • the ventilation hole is circular.
  • the adjacent universal filament conductors are respectively connected to the high voltage pole and the ground pole of the AC high voltage power supply.
  • the shape of the discharge wire made of tungsten wire, steel wire or thorn barb is sawtooth, needle point, spike, thorn barbed wire or wire mesh.
  • the fourth form of electrocoagulation component can be set as follows:
  • the electrocoagulation and combining component includes an airflow mesh plate and a plurality of discharge conductor flowers in the form of Pall ring structures arranged on the airflow mesh plate, wherein the airflow mesh plate is provided with a plurality of airflow meshes, and the airflow mesh A discharge conductor flower is provided in the hole.
  • the air flow mesh is arranged on the air flow mesh plate into multiple exhaust flow meshes, and the air flow meshes between each exhaust flow mesh are spaced apart;
  • a discharge conductor flower is provided in the central area of each airflow mesh.
  • Each discharge conductor flower includes a plurality of tongues distributed staggered along the space wall forming the airflow mesh. Conductive wires are passed between the plurality of tongues. connect,
  • the airflow mesh is circular, oval or rectangular, the plurality of tongues in each airflow mesh are in the form of a ring formed by petals, and the ventilation hole is circular;
  • the adjacent discharge conductor flowers are respectively connected to the high voltage pole and the ground pole of the AC high voltage power supply.
  • the tongue is made of tungsten wire, steel wire or burr in the shape of sawtooth, needle point, spike, thorn-like barbed wire or wire mesh.
  • Electrocoagulation and merging components are used. Multiple airflow meshes are provided on the electrocoagulation and merging components to achieve uniform airflow distribution.
  • the AC high-voltage power supply supplies power to the universal drawn filament conductors and two adjacent rows of tensile wires.
  • the inward-drawn filament conductors are respectively connected to the high-voltage pole and the ground electrode of the AC high-voltage power supply, so that the gas near the universal-drawn filament conductor is ionized to generate a large amount of charges.
  • the small-sized oil fume particles in the oil fume exhaust gas condense and agglomerate under the action of the alternating electric field. Large-sized oil fume particles are formed and charged.
  • the treatment effect can be doubled. Improved processing efficiency.
  • the dynamic twisted cage type corona discharge component is used to provide centrifugal force and electric field force.
  • the negative high-voltage DC power supply supplies power to the discharge electrode, so that the discharge electrode is close to the
  • the gas (oil fume exhaust gas) is ionized to produce a large amount of negative charges.
  • the large-size oil fume particles in the oil fume exhaust gas are negatively charged under the action of negative DC corona; at the same time, due to the discharge electrode in the dynamic cage (horizontal) corona discharge component It is in a high-speed rotating state, so it can generate centrifugal force.
  • the large-size oil fume particles in the oil fume exhaust gas are thrown to the cylindrical wall surface of the corona discharge component under the action of centrifugal force, and then collected in the oil collection tank and discharged through the oil drain valve.
  • the atomizing nozzle assembly and the dynamic cage-type corona discharge component realize atomizing corona.
  • the atomizing corona plasma technology takes into account the technical advantages of both electrostatic deposition and plasma, and can achieve the treatment of various pollutants in oil fume exhaust gas. Perform collaborative control.
  • the discharge electrode generates negative corona discharge under the action of negative high-voltage DC power supply.
  • the atomized water supply system continuously supplies water to the discharge electrode, causing an electrohydrodynamic atomization film to be formed on the surface of the discharge electrode.
  • the atomized water droplets are highly charged by free electrons and ions, and fly towards the discharge electrode at high speed under the action of the electric field.
  • the shell wall purifies oil fumes and particulate matter.
  • atomized corona plasma technology also has a purification mechanism such as the dynamic coagulation of high-speed water droplets, the electrostatic coagulation of charged water droplets, and the electronic charging of tiny dust. Has higher removal efficiency.
  • the discharge electrode water supply can be continuously atomized, oil droplets are prevented from sticking to the discharge electrode and dust collection electrode, ensuring long-term stable and efficient operation of the device.
  • the atomized corona plasma can remove VOCs in oil fumes and eliminate odors.
  • atomized corona plasma can purify circulating water at any time and minimize sewage discharge.
  • the plasma contains free electrons, high-energy particles and active particles. Water mist can further interact with the plasma to generate highly active free radicals such as ⁇ OH and ⁇ O. Strong oxidizing molecules such as and O 3 , highly active free radicals such as ⁇ OH and ⁇ O, and strong oxidizing molecules such as O 3 can react with VOCs and gas phase molecules with malodorous odors in oil fume exhaust gas to generate CO 2 , H 2 O, etc. Poisonous and harmless small molecule substances.
  • the dynamic adsorption plate By rotating the adsorption plate, the dynamic adsorption plate can not only increase the area exposed to the oil fume exhaust gas and improve the treatment effect, but also realize the self-cleaning function by rotating away the oil fume deposits on the adsorption plate, especially with the rotation direction of the discharge electrode. Collaboration can significantly improve treatment effects.
  • Figure 1A is a cross-sectional schematic diagram of an atomized corona oil fume exhaust gas purification device provided by an embodiment of the present invention
  • Figure 1B is a schematic cross-sectional view of a modification of Figure 1A;
  • Figure 1C is a schematic cross-sectional view of another modification of Figure 1A;
  • Figure 2A is a schematic diagram of the electrocoagulation components in the atomized corona oil fume exhaust gas purification device according to the embodiment of the present invention.
  • Figure 2B is a schematic diagram of a modification of Figure 2A
  • Figure 2C is a schematic diagram of another modification of Figure 2A;
  • Figure 2D is a schematic diagram of another modification of Figure 2A;
  • Figure 3A is a schematic diagram of the atomizing corona rotating component in the atomizing corona oil fume exhaust gas purification device according to the present invention
  • Figure 3B is an overall schematic diagram of the cage-type corona discharge component of Figure 3A;
  • Figure 3C is a schematic diagram of the atomizing corona rotating component with an atomizing nozzle according to the present invention.
  • Figure 3D is a cross-sectional schematic diagram of the atomized corona rotating component of Figure 3C;
  • Figure 4A is a schematic diagram of the dynamic adsorption plate in the atomized corona oil fume exhaust gas purification device according to the present invention.
  • Figure 4B is a schematic diagram of another modification of the dynamic adsorption plate according to the present invention.
  • the atomizing corona oil fume exhaust gas purification device 100 is generally in a cylindrical shape.
  • the air inlet 10 and the air outlet 50 are respectively provided at both ends of the cylindrical housing 60 .
  • Both the air inlet 10 and the air outlet 50 are provided as annular steps with a diameter smaller than that of the housing 60 .
  • the dynamic meaning in the names of the components of the atomized corona oil fume exhaust gas purification device 100 means that the exhaust gas treatment components can rotate, which is dynamic compared to the static situation in the prior art. , which means it can turn or rotate.
  • the electrocoagulation component 20 , the atomizing corona rotating component 30 , the dynamic adsorption plate 40 and other components are all arranged in the housing 60 .
  • a long strip is provided at the bottom of the housing 60
  • the oil collecting tank 61, the atomizing corona rotating component 30, and the dynamic adsorption plate 40 throw the collected oil smoke particles onto the inner wall of the housing 60 during the rotation process. By arranging them uniformly in one housing, they can share an oil collecting tank 61, thus simplifying the structure.
  • an oil collecting box 62 can be provided below the oil collecting tank 61.
  • the oil collecting tank 61 and the oil collecting box 62 can be connected through the opening on the oil collecting tank 61, so that the oil collecting box 62 can be removed and the oil collecting box can be removed.
  • the oil fume particles in 62 are discharged.
  • supporting legs 63 may also be provided at the bottom or four corners of the housing 60 .
  • the oil fume exhaust gas to be purified first enters from the air inlet 10 , then passes through the electrocoagulation and merging component 20 , the atomizing corona rotating component 30 , the dynamic adsorption plate 40 in sequence, and finally flows out from the air outlet 50 .
  • the electrocoagulation and merging component 20 is configured to charge, coagulate and agglomerate the oil fume particles in the oil fume exhaust gas.
  • the atomizing corona rotating component 30 includes a water shaft 31, atomizing nozzles 34 spaced on the water shaft 31, and a plurality of discharge electrodes 33 arranged in a cage shape on the surface of the water shaft 31.
  • the plurality of discharge electrodes 33 rotate to throw the oil fume particles that have undergone atomization corona treatment onto the inner wall of the housing 60 .
  • the dynamic adsorption plate 40 includes a rotating shaft 41 and a rotatable adsorption plate 42 disposed thereon.
  • the adsorption plate 42 throws at least part of the remaining oil smoke particles onto the inner wall of the housing 60 .
  • electrocoagulation component 20 matches or conforms to the interior shape of housing 60 . That is, the periphery of the electrocoagulation and merging component 20 is sealingly connected to the casing 60 to prevent the oil fume exhaust gas from passing through the periphery of the electrocoagulation and merging component 20 , resulting in part of the oil fume exhaust gas not being electrocoagulated and treated.
  • the water passing axis 31 of the atomizing corona rotating component 30 and the rotating axis 41 of the dynamic adsorption plate 40 are provided as separate components, which allows the rotation direction to be adjusted as desired.
  • the water passage shaft 31 rotates clockwise to form a clockwise first vortex
  • the rotating shaft 41 can be set to rotate counterclockwise to form a counterclockwise second vortex.
  • By setting the first vortex and the second vortex in opposite directions, can generate greater air flow disturbance in the casing 60, allowing more oil fume exhaust gas to pass through the adsorption plate 42 of the dynamic adsorption plate 40, producing a more efficient electrostatic adsorption effect, and improving the purification efficiency.
  • the water passage axis 31 of the atomizing corona rotating component 30 can be arranged to be the same axis as the rotation axis of the dynamic adsorption plate 40 . In this way, a vortex airflow in the same direction will be formed in the casing 60.
  • By adjusting the rotation speed more oil fume exhaust gas can collide with the inner wall of the casing 60 and more oil fume particles can be thrown onto the inner wall of the casing 60. It is more conducive to collecting oil smoke particles and achieving a better self-cleaning effect.
  • the electrocoagulation and merging component 20' can also be arranged to form a certain gap with the inner wall of the housing 60, thereby allowing the electrocoagulation and merging component 20' to pass through itself
  • the rotating shaft is driven or integrated on the water shaft 31 to rotate simultaneously with the atomizing corona rotating component 30.
  • the electrocoagulation and merging component 20' is integrated on one end of the water shaft 31 and is driven to rotate by it, which can further simplify the structure. .
  • the electrocoagulation component 20' may be configured to be rotatable such that the electrocoagulation component
  • the component 20', the atomizing corona rotating component 30 and the dynamic adsorption plate 40 can all be arranged on the same water axis 31 for rotation, which simplifies the structure and is more conducive to generating stronger airflow vortices and larger flow rates.
  • the oil fume exhaust gas passes through the purification device, more oil fume particles will be thrown onto the inner wall of the housing 60 .
  • An even better advantage is that the entire device no longer needs to be cleaned and can be self-cleaning.
  • the electrocoagulation component 20 is configured as a universal wire drawing component for electrocoagulation and treatment.
  • the electrocoagulation component 20 includes an airflow mesh plate 21 and a plurality of universal filament conductors 22 arranged on the airflow mesh plate 21, wherein a plurality of airflow meshes are provided on the airflow mesh plate 21.
  • the air flow mesh 23 is arranged as multiple exhaust flow meshes 23 on the air flow mesh plate 21 , and the air flow meshes 23 between each exhaust flow mesh 23 are spaced apart.
  • a universal wire drawing conductor 22 is provided in the center area of four adjacent air flow mesh holes 23 between two adjacent rows of air flow mesh holes 23 , and the plurality of universal wire drawing conductors 22 are connected by conductive wires 24 .
  • the shape of the universal drawn wire conductor 22 made of tungsten wire, steel wire or burr is sawtooth, needle point, spike, thorn barbed wire or wire mesh.
  • the airflow mesh 23 is in a circular, oval or rectangular shape, the universal wire drawing conductor 22 is in a four-pointed star shape, and two adjacent rows of the universal wire drawing conductors 22 are respectively connected to the high voltage pole and the ground pole of the AC high voltage power supply.
  • the electrocoagulation component 20 will produce regular alternating electric field changes.
  • charged oil fume particles pass by, due to the alternating effect of the changing electric field, the positively and negatively charged particles will move, causing collision and agglomeration. Small particles will agglomerate into large particles.
  • the electrocoagulation component 20 includes an airflow mesh plate 21 and a plurality of universal filigree conductors 22 arranged on the airflow mesh plate 21 , wherein a plurality of airflow meshes are provided on the airflow mesh plate 21 .
  • Mesh 23, the air flow mesh 23 is provided with a universal wire drawing conductor 22.
  • the air flow mesh 23 is arranged as multiple exhaust flow meshes 23 on the air flow mesh plate 21 , and the air flow meshes 23 between each exhaust flow mesh 23 are spaced apart.
  • a universal wire drawing conductor 22 is provided in the central area of each airflow mesh 23 , and multiple universal wire drawing conductors 22 are connected by conductive wires 24 .
  • the shape of the universal drawn wire conductor 22 made of tungsten wire, steel wire or burr is sawtooth, needle point, spike, thorn barbed wire or wire mesh.
  • the airflow mesh 23 is in a circular, elliptical or rectangular shape, and the universal wire drawing conductor 22 is preferably arranged in a m-shape or a radiating shape from the center. Arranged in this form, the discharge area of the universal drawn filament conductor 22 can be in better contact with the oil fume exhaust gas flow, thereby achieving better treatment effects. Setting it into a roughly rice-shaped shape can achieve the function of uniform airflow and make the airflow distribution more even.
  • Two adjacent rows of universally drawn wire conductors 22 are respectively connected to the high-voltage pole and the ground electrode of the AC high-voltage power supply.
  • two adjacent rows of universally drawn wire conductors 22 can be arranged to be respectively connected to the high-voltage pole and the ground electrode of the power supply. superior.
  • the electrocoagulation component 20 will produce regular alternating electric field changes.
  • charged oil fume particles pass by, due to the alternating effect of the changing electric field, the positively and negatively charged particles will move, causing collision and agglomeration. Small particles will agglomerate into large particles.
  • the electrocoagulation and combining component 20 includes an airflow mesh plate 21 and a plurality of universal filament conductors 22 arranged on the airflow mesh plate 21, wherein a plurality of airflow meshes are provided on the airflow mesh plate 21.
  • the mesh 23 and the airflow mesh 23 are provided with universal drawn wire conductors 22, and the universal drawn wire conductors 22 are provided with ventilation holes 25.
  • the air flow mesh 23 is arranged as multiple exhaust flow meshes 23 on the air flow mesh plate 21 , and the air flow meshes 23 between each exhaust flow mesh 23 are spaced apart.
  • a universal drawn filament conductor 22 is provided in the central area of each airflow mesh 23 .
  • Each universal drawn filament conductor 22 is provided with a ventilation hole 25 .
  • Conductive wires 24 pass between the plurality of universal drawn filament conductors 22 . connect.
  • the airflow mesh 23 is circular, elliptical or rectangular, the universal filament conductor 22 is arranged in an annular shape with a plurality of uniformly arranged discharge wires 26, the ventilation holes 25 are circular; adjacent The universal drawn filament conductors 22 are respectively connected to the high voltage pole and the ground pole of the AC high voltage power supply.
  • the shape of the discharge wire 26 made of tungsten wire, steel wire or barbed wire is sawtooth, needle point, spike, thorn-shaped barbed wire or wire mesh.
  • the electrocoagulation component 20 Since the AC high-voltage power supply waveform is alternating between positive and negative, the electrocoagulation component 20 will produce regular alternating electric field changes. When the charged oil fume particles pass through the periphery of the universally drawn filament conductor 22 and its corresponding vent hole 25, due to the alternating effect of the changing electric field, the positive and negative charged particles will move, which can achieve the effect of double discharge processing, thereby achieving Better collision and agglomeration, small particles will agglomerate into large particles, improving the treatment effect.
  • the electrocoagulation and combining component 20 includes an airflow mesh plate 21 and a plurality of discharge conductor flowers 22 in the form of Pall ring structures arranged on the airflow mesh plate 21, wherein the airflow mesh plate 21 is provided with There are a plurality of airflow meshes 23, and discharge conductor flowers 22 are provided in the airflow meshes 23.
  • the air flow mesh 23 is arranged as multiple exhaust flow meshes on the air flow mesh plate 21 , and the air flow meshes between each exhaust flow mesh 23 are spaced apart.
  • a discharge conductor flower 22 is provided in the central area of each airflow mesh 23.
  • Each discharge conductor flower 22 includes a plurality of tongues 28 distributed staggered along the space wall forming the airflow mesh.
  • the plurality of tongues 28 are connected by conductive wires.
  • the central area of the airflow mesh 23 except for the plurality of tongues 28 forms a ventilation hole that allows oil fume exhaust gas to pass.
  • the airflow mesh 23 is in a circular, oval or rectangular shape, and a plurality of tongues 28 in each airflow mesh 23 present a
  • the vents are circular in the form of a donut formed by the petals.
  • the adjacent discharge conductor flowers 22 are respectively connected to the high voltage pole and the ground pole of the AC high voltage power supply.
  • the shape of the tongue 28 made of tungsten wire, steel wire or burr is sawtooth, needle point, spike, thorn-like barbed wire or wire mesh.
  • the discharge conductor flower 22 arranged in the form of a Pall ring structure can have the advantages of small resistance, large gas flux, large elasticity of the tongue piece 28, and large internal specific surface area, resulting in higher discharge effect.
  • the atomizing corona rotating component 30' may be provided in the form of an atomizing nozzle assembly in front of the cage-type corona discharge component.
  • the atomizing nozzle assembly includes a plurality of nozzles 34 and a support plate 35, so The plurality of nozzles 34 are evenly arranged on the support plate 35 and are connected to the external atomization water supply system through pipes, so that liquids such as water can be sprayed from the nozzles 34 .
  • the atomizing nozzle assembly is arranged between the electrocoagulation part 20 and the atomizing corona rotating part 30' and the nozzle 71 injects liquid toward the atomizing corona rotating part 30'.
  • the plurality of atomizing nozzles 34 are hollow conical nozzles, and the spray areas of the plurality of atomizing nozzles 34 are annular.
  • the heat in the oil fume exhaust gas can be quickly transferred to achieve a cooling effect; on the other hand, a good impact effect of airborne droplets can be achieved to form oil-in-water droplets. Due to the charge of the oil-in-water droplets, static electricity can be generated at the rear end.
  • the adsorption area (dynamic adsorption plate 40) captures.
  • the atomizing corona By combining the atomizing nozzle assembly and the atomizing corona rotating component 30', the atomizing corona can be used to generate plasma.
  • the plasma system contains free electrons and active groups, which can effectively remove VOCs and malodorous gas pollutants.
  • the particle size of the mist droplets sprayed by the atomizing nozzle is between 2-50 ⁇ m, so that the sprayed mist droplets are fine and uniform, achieving better effects.
  • the spray angle of the atomizing nozzle 34 is at an angle of 25-150° relative to the center line of the housing 60 . It can be understood that the injection angle, injection pressure and flow rate are adjusted according to the air volume of the treated oil fume exhaust gas. The injection angle is between 25-150°, and the goal is to achieve the best humidification and atomization effect.
  • the atomizing nozzle assembly plus the dynamic cage (horizontal) discharge corona component is used to achieve atomizing corona.
  • the atomizing corona plasma technology takes into account the technical advantages of both electrostatic deposition and plasma, and can Achieve coordinated control of multiple pollutants in oil fume exhaust gas.
  • the dynamic cage (horizontal) discharge corona component includes a discharge electrode 33.
  • the discharge electrode 33 generates negative corona discharge under the action of negative high-voltage DC power supply.
  • the atomized water supply system continuously supplies water to the discharge electrode 33 through the atomizing nozzle 34, so that an electrohydrodynamic atomization film is formed on the surface of the discharge electrode 33, and at the same time, the atomized water droplets are highly charged by free electrons and ions. Under the action of the electric field, it flies towards the casing 60 at high speed to purify oil smoke and particulate matter.
  • atomized corona plasma technology In addition to the wet electrostatic precipitating mechanism, atomized corona plasma technology also increases the dynamic coalescence of high-speed water droplets and the electrostatic charge of charged water droplets through atomized corona discharge. Purification mechanisms such as coagulation and electronic charging of fine dust, thus having higher removal efficiency for fine dust.
  • the discharge electrode 33 can continuously atomize the water supply, it avoids oil droplets sticking to the discharge electrode and the dust collection electrode, ensuring long-term stable and efficient operation of the device.
  • the atomized corona plasma can remove VOCs in oil fumes and eliminate odors.
  • atomized corona plasma can purify circulating water at any time and minimize sewage discharge.
  • the plasma contains free electrons, high-energy particles and active particles. Water mist can further interact with the plasma to generate highly active free radicals such as ⁇ OH and ⁇ O. Strong oxidizing molecules such as and O 3 , highly active free radicals such as ⁇ OH and ⁇ O, and strong oxidizing molecules such as O 3 can react with VOCs and gas phase molecules with malodorous odors in oil fume exhaust gas to generate CO 2 , H 2 O, etc. Poisonous and harmless small molecule substances.
  • the particle size of the oil smoke particles to be purified (herein referred to as the first oil smoke particles) is between 0.01-2 ⁇ m.
  • the first oil smoke particles in the oil smoke exhaust gas pass through the electrocoagulation and merging component 20, the first oil smoke particles are One oil smoke particle is charged, condensed and agglomerated to form a second oil smoke particle.
  • the particle size of the second oil smoke particle is larger than the particle size of the first oil smoke particle.
  • the cage corona discharge component 30' includes a central axis 31', a blade frame 32 and a plurality of discharge electrodes 33.
  • One end of each discharge electrode 33 is connected to the central axis 31', and the other end of the discharge electrode 33 is connected to the central axis 31'.
  • One end is connected to the blade frame 32, thereby forming a shape similar to a winch as a whole. It can be seen from the cross-section of the figure that five discharge electrodes 33 can be provided in each blade frame 32. Of course, more or less discharge electrodes 33 can also be provided.
  • the blade frame 32 is hollow, and the discharge electrodes 33 are arranged in a spiral shape at intervals in the hollow area of the blade frame. That is, the discharge electrode 33 has a spiral shape as a whole.
  • the discharge electrode 33 can be made of materials such as burrs, tungsten wire, molybdenum wire or stainless steel wire.
  • the discharge electrode 33 is corrugated and has a width ranging from 5 to 15 mm.
  • the discharge electrode 33 is laterally inclined at a predetermined angle with respect to the axis of the central axis 31', and the discharge electrode is arranged at an inclination with respect to the axis of the central axis 31', specifically 10-80 degrees (for example, 30-60 degrees), or 100-170 degrees. degree (eg 120-150 degrees).
  • the central shaft 31' is driven by a motor to rotate, thereby driving the discharge electrode 33 to rotate.
  • the preferred material of the discharge electrode 33 is burr, because using burr as the discharge electrode material has low corona voltage and discharge points are densely distributed throughout the burr material.
  • the barbed electrode can be made of at least one of bristle, nylon wire, steel wire and copper wire; the central shaft 31' can be made of at least one of iron wire and stainless steel wire, thereby achieving a lower cost.
  • the rotation speed of the discharge electrode 33 or the central axis 31' is between 60-300r/min.
  • the corrugated discharge electrodes and the laterally inclined arrangement make the gas to be treated rotate in the discharge cage (i.e., the discharge electrode 33
  • the space formed by rotation generates vortices in the central area.
  • eddy current can increase the charging probability of oil fume particles; on the other hand, it can make The oil fume particles with smaller particle sizes adhere to each other to form oil fume particles with larger particle sizes. Under the action of the above two aspects, the purification efficiency of oil fume particles can be significantly improved.
  • the atomizing corona rotating component 30' provides centrifugal force and electric field force.
  • the negative high-voltage DC power supply supplies power to the discharge electrode 33, so that the discharge electrode 33
  • the nearby gas is ionized to generate a large amount of negative charges, and the large-size oil fume particles in the oil fume exhaust gas are negatively charged under the action of negative DC corona; at the same time, because the discharge electrode 33 in the dynamic cage (horizontal) corona discharge component 30' is in The high-speed rotation state can generate centrifugal force, and the large-size oil fume particles in the oil fume exhaust gas are thrown to the cylindrical wall surface of the corona discharge component 30' under the action of centrifugal force, and then collected in the oil collection tank and discharged through the oil collection box.
  • FIG. 3C and 3D a structure integrating an atomizing nozzle and a cage-type dynamic corona discharge component is shown.
  • the structure is different from that shown in Figures 3A and 3B in that on the water shaft 31 provided with the discharge electrode 33, the plurality of atomizing nozzles 34 are arranged in a row along the longitudinal length of the water shaft 31, and Multiple rows of atomizing nozzles 34 are arranged on the entire circumferential surface of the water passage shaft 31 .
  • the plurality of atomizing nozzles 34 are hollow conical nozzles, and the spray areas of the plurality of atomizing nozzles 34 are annular.
  • the particle size of the mist droplets sprayed by the atomizing nozzle 34 is between 2-50 ⁇ m.
  • the spray angle of the atomizing nozzle 34 is at an angle of 25-150° relative to the center line of the water axis 31 .
  • the water shaft 31 is connected to the external water supply system, so that the atomizing nozzle can spray water and other liquids.
  • each nozzle 34 By arranging multiple atomizing nozzles 34 along the longitudinal length of the water axis 31, a better atomizing effect can be achieved compared to the structure of FIG. 3A, and each nozzle can better spray water onto the corresponding discharge electrode 33. . If an atomizing nozzle is provided only at one end of the water passing shaft 31, sufficient liquid droplets will not be obtained at the other end.
  • the dynamic adsorption plate 40 includes a rotating shaft 41 and a plurality of adsorbing electrode plates 42 installed on the rotating shaft 41 , and the plurality of adsorbing electrode plates 42 are spaced apart from each other.
  • the adsorption electrode plates 42 are arranged on the rotation shaft 41 at a circumferential angle interval of 5-20°.
  • the rotating shaft 41 can be driven to rotate by an external driving device (such as a motor), thereby driving the adsorption pole plate 42 to rotate at a speed of 500-1500 r/min.
  • the rotation of the discharge electrode 33 will result in the generation of eddy currents in a certain direction.
  • the rotation direction of the rotating shaft 41 is set to be opposite to it, so as to achieve greater air flow disturbance and adsorb the electrode plate. 42 can be exposed to more flow of oil fume exhaust gas.
  • the discharge electrode 33 and the adsorption plate 42 can also be arranged to rotate clockwise or counterclockwise in the same direction. It is not necessary for them to rotate in the opposite direction. Those skilled in the art can choose according to actual needs.
  • the adsorption plate 42 is provided with a plurality of herringbone or corrugated patterns.
  • each adsorption pole plate 41 can be an aluminum plate, a galvanized plate or a steel plate, among which the aluminum plate is preferred because the aluminum plate is lighter in weight, has better heat dissipation effect, and is less likely to catch fire.
  • the adsorption plate 42 may be provided with a convex and concave structure, such as a herringbone-shaped or corrugated pattern, to achieve a larger contact area for oil fume gas.
  • the arrangement direction of the adsorption electrode plates 42 is perpendicular to the paper surface of FIG. 1 or perpendicular to the flow direction of the air flow.
  • the function of the dynamic adsorption plate 40 is to realize dynamic electrostatic adsorption.
  • the positive high-voltage DC power supply supplies power to the adsorption plate 42 through the rotating shaft 41 or the corresponding conductive connection device.
  • the charged oil smoke particles are captured by the dynamic adsorption plate 40 under the action of the electrostatic field.
  • the oil smoke particles are thrown to the inner wall of the housing 60, and finally collected in the oil collection box through the oil collection tank 61. 62 in.
  • the central axis 31' drives the discharge electrode 33 to rotate clockwise or counterclockwise, for example, eddy currents will be generated in the cavity of the housing 60.
  • the rotating axis 41 drives the adsorption electrode plate. 42 reverse rotation can generate vortices in another direction, thereby increasing the disturbance of the exhaust gas flow and better performing electrostatic adsorption.
  • the dynamic adsorption plate 40 can also be configured to include a rotation shaft 41 and a plurality of adsorption pole plates 42 arranged on the rotation shaft 41 in an S-shaped bending structure.
  • the dynamic adsorption plate 40 includes a plurality of adsorption pole plates 42 arranged in an S-shaped bent structure at the other end of the water passing axis 31 . That is to say, the water passing shaft 31 and the driving shaft 41 can be integrated to facilitate better control.
  • the adsorption plate 42 adopts an S-shaped bending structure, which can increase the adsorption area, and high-speed rotation can generate larger vortices. Since the vortex is formed and the shape is set into an S shape, the residence time of oil fume particles can be effectively prolonged, which is beneficial to improving the adsorption efficiency. .

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Abstract

La présente invention relève du domaine technique de la lutte contre la pollution de l'air. L'invention concerne un appareil de purification de gaz résiduaire de fumée d'huile basée sur corona et une atomisation et un procédé de purification. Une entrée d'air et une sortie d'air sont respectivement disposées sur deux extrémités d'un boîtier de l'appareil de purification de gaz résiduaire de fumée d'huile basée sur corona et une atomisation. Le boîtier comprend en son intérieur : un composant d'agglomération électrique configuré pour charger et agglomérer des particules de fumée d'huile dans un gaz résiduaire de fumée d'huile ; un composant rotatif de corona et une atomisation comprenant un arbre de passage d'eau, des buses d'atomisation réparties sur l'arbre de passage d'eau à des intervalles, et une pluralité d'électrodes d'évacuation disposées sur la surface de l'arbre de passage d'eau pour former une forme hélicoïdale, la pluralité d'électrodes d'évacuation lançant les particules de fumée d'huile ayant subi un traitement par corona et une atomisation à la paroi interne du boîtier au moyen d'une rotation ; et une plaque d'adsorption dynamique comprenant des plaques polaires d'adsorption rotatives, les plaques polaires d'adsorption jetant au moins certaines des particules de fumée d'huile restantes à la paroi interne du boîtier.
PCT/CN2023/116668 2022-09-05 2023-09-04 Appareil de purification de gaz résiduaire de fumée d'huile basée sur corona et une atomisation et procédé de purification WO2024051629A1 (fr)

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