KR101852163B1 - An apparatus combined electrostatic spraying with electrostatic precipitator for removing fine particulate matter - Google Patents
An apparatus combined electrostatic spraying with electrostatic precipitator for removing fine particulate matter Download PDFInfo
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- KR101852163B1 KR101852163B1 KR1020170032261A KR20170032261A KR101852163B1 KR 101852163 B1 KR101852163 B1 KR 101852163B1 KR 1020170032261 A KR1020170032261 A KR 1020170032261A KR 20170032261 A KR20170032261 A KR 20170032261A KR 101852163 B1 KR101852163 B1 KR 101852163B1
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- exhaust gas
- cleaning liquid
- cleaning
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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
- B03C3/019—Post-treatment of gases
-
- 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
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/36—Controlling flow of gases or vapour
-
- 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
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/40—Electrode constructions
-
- 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
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/66—Applications of electricity supply techniques
Abstract
Description
More particularly, the present invention relates to an apparatus for removing particulate matter (PM) of 2.5 or less by increasing the residence time of an exhaust gas including fine dust, It is a fine dust removal device that combines an electrostatic spray system with an electrostatic precipitator.
The dust collecting method includes a gravity dust collecting device for precipitating dust naturally by the movement of air using gravity, an inertial force collecting device for collecting dust by inertia at a turning point by rapidly changing the airflow direction, a filtering dust collecting method using a filter, A centrifugal force collecting device using centrifugal force, and an electric dust collecting method using static electricity are known. The air cleaning method is known as a U.V./photocatalytic method, a high-temperature plasma method, a low-temperature plasma method, a biofilter method, a hybrid method in which a filter and a plasma are combined.
Such a dust collecting method and an air cleaning method are selected by taking advantage of different strengths and weaknesses. Especially, cyclone type dust collector using centrifugal force has an advantage that the dust collection rate is about 90% at the waste incineration facility and the operation cost is not so high. However, in the case of the cyclone type dust collector, the dust collection rate for the fine dust (<5 μm) sharply drops, which makes it difficult to collect the fine dust. On the other hand, the electric dust collection method is known to be very effective for fine dust.
Among the air cleaning methods, the UV / photocatalytic method has a disadvantage in that the efficiency is low. The high temperature plasma method has a problem that it is difficult to enlarge the plasma torch reactor and its life is short. In the case of the low temperature plasma method, Organic Compounds are removed and the efficiency is relatively high.
Korean Patent No. 10-0150707 discloses a dust collector employing a cyclone system. As shown in FIG. 1, a wire-shaped discharge electrode is installed inside a hopper to generate a corona discharge inside the hopper to ionize the fine dust, And is collected by the dust collector at the bottom of the hopper by its own weight while hitting the wall after moving.
However, when the corona discharge is generated by installing only the wire inside the hopper, since the corona discharge mainly occurs between the exhaust pipe and the wire electrode in the center, the plasma generation area is small and the ionized dust particles move to the inside surface of the exhaust surface, Since the exhaust gas flows in the upward direction of the exhaust pipe, the dust collected does not fall down effectively and the dust collecting efficiency is low. In addition, there is a disadvantage in that the plasma generation region is small and the VOC removal capability is not large. In order to secure this, Korean Patent Registration No. 10-0150707 discloses that a preliminary charging device is additionally provided at the inlet of the cyclone so that fine dust is first charged and moved to the inside of the cyclone, . In this case, the electrode structure of the preliminary charging device is different from that of the cyclone, so that two power supply devices are required, and the VOC removal efficiency is not large because the plasma generating area is small.
The conventional wet scrubber system has a disadvantage in that the collecting efficiency thereof is rapidly deteriorated from particles of 3 탆 or less. However, in the case of particles in the range of 0.1 to 1 탆, it is too large to be subjected to the inertia force and too large and too high to have a sufficient diffusing force. The collection efficiency can not be achieved. Therefore, in the conventional wet scrubber, the treatment efficiency with respect to the fine particles of 1 μm or less is inevitably at an extremely low level (10 to 30%).
Meanwhile, a wet electrostatic precipitator is used as a device for treating fine particles. However, in order to satisfy a high treatment efficiency for particles less than 0.5 μm, a huge corona field is required, and operation cost and initial installation In terms of cost, there is an undesirable aspect in particle treatment of 1 탆 or less. In addition, a separate wet scrubber system is required for the absorption of harmful gas, which requires additional cost
Thus, the conventional wet scrubber system is used to simultaneously treat gaseous substances and particulate matter by ensuring a sufficient gas-liquid contact area using a filling material. However, in the actual wet scrubber system, The treatment efficiency with respect to the fine particles is extremely low, so that the high treatment efficiency with respect to the pollutant can not be obtained and the white smoke caused by the aerosol at the final outlet can not be suppressed.
Such a particle removing apparatus has no problem in the field of dust removal during simple exhaust but has a problem in that it needs to be replenished by a reduced pressure in the field of continuous use by circulating the transfer gas. Further, there has been a problem in that dust separation from the gas can not be efficiently performed while minimizing the pressure loss.
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an electrostatic spraying system capable of removing small particles of PM2.5 or less by electrostatic spraying and a fine dust- .
According to an aspect of the present invention, there is provided an exhaust gas purifying apparatus comprising: a gas inlet through which exhaust gas flows; An electric dust collection unit for primarily exhausting dust in the exhaust gas; A cleaning unit in which an exhaust gas passing through the electric dust collection unit is filled with a cleaning liquid in the lower part and is passed through while being in vapor-liquid contact therewith; An electrostatic atomizing unit for bringing the exhaust gas passing through the cleaner into contact with the charged droplets ejected to the electrostatic spray nozzle; And a mist removing unit for separating moving liquid droplets such as exhaust gas passing through the electrostatic spraying unit; And a gas outlet through which the exhaust gas is exhausted through the mist eliminator.
Wherein the electrostatic spraying unit comprises: a cleaning liquid jetting unit having a plurality of electrostatic spray nozzles formed therein and having a plurality of cleaning liquid tubes supplied with a cleaning liquid to which an (-) electrode is applied; And a lattice unit to which a (+) electrode having a space for an electrostatic spraying effect of the sprayed cleaning liquid applied with the negative electrode is applied.
The electrostatic atomizing unit is modular in that it can be replaced and installed in plural.
And an insulator is installed on one side of the cleaning liquid ejection unit or the electrostatic atomizing unit to prevent a short circuit.
At least two of the electric dust collecting units are installed in parallel to each other so as to collect the exhaust gas introduced into the electrostatic spray compound fine dust removing apparatus frame so as to collect the exhaust gas flowing into the gas suction port, A plurality of discharge electrodes provided so as to generate a discharge corresponding to application of a high voltage and one end and the other end of each discharge electrode being positioned between the discharge electrodes and being fixed to a dust collecting frame, And a plurality of dust collecting poles which are provided as far as possible.
The cleaning unit is configured to form a concave structure between the electrostatic dust collecting unit and the electrostatic spraying unit so that the exhaust gas passing through the electrostatic dust collecting unit while receiving the sprayed cleaning liquid from the electrostatic spraying unit .
And a plurality of cleaning liquid ejection openings are formed in the curved portion of the cleaning unit such that sufficient gas-liquid contact occurs.
And a plurality of porous distribution plates are formed on the curved portion and the bottom surface of the cleaning unit to uniformize the flow of the exhaust gas.
The mist elimination unit is formed by stacking a plurality of eliminators on a channel, and the eliminator comprises a contact portion and a drain portion bent perpendicularly to one end of the contact portion.
Wherein the liquid droplet is a mixture of water and an ionizing liquid.
According to the apparatus for removing fine dust combined with the electrostatic atomizing system of the present invention and the electrostatic precipitator as described above, the following effects can be obtained.
The removal efficiency of the fine particles of the conventional particle removing device depends on the exhaust gas velocity or the particle size. On the other hand, the fine dust removing device combined with the electrostatic spraying system and the electrostatic dust collector can exhibit a certain removal efficiency in a relatively wide operating range, There is a problem in that it is difficult to efficiently separate small particles of PM2.5 or less by gravitational settling, electrostatic dust collecting, or wet scrubbing. However, by using electrostatic spraying in the fine dust removing unit combined with electrostatic spraying system and electrostatic precipitator The fine particles can be removed together and the removal efficiency can be increased.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an apparatus for removing fine dust combined with an electrostatic spray system and an electrostatic precipitator according to a preferred embodiment of the present invention. FIG.
2 is a diagram of an electrostatic atomizing unit according to a preferred embodiment of the present invention.
3 is a view of a cleaning unit and an electric dust collection unit according to a preferred embodiment of the present invention.
4 is a view of a mist removing unit according to a preferred embodiment of the present invention.
5 is an operation diagram of the electrostatic atomizing unit of the fine dust removing apparatus combined with the electrostatic atomizing system according to the preferred embodiment of the present invention.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Reference will be made to the above-mentioned prior art for the same constitution as the prior art among the constitutions of the present invention to be described below.
A gas inlet through which exhaust gas flows; An electric dust collection unit for primarily exhausting dust in the exhaust gas; A cleaning unit in which an exhaust gas passing through the electric dust collection unit is filled with a cleaning liquid in the lower part and is passed through while being in vapor-liquid contact therewith; An electrostatic atomizing unit for bringing the exhaust gas passing through the cleaner into contact with the charged droplets ejected to the electrostatic spray nozzle; And a mist removing unit for separating moving liquid droplets such as exhaust gas passing through the electrostatic spraying unit; And a gas outlet through which the exhaust gas is exhausted through the mist eliminator.
The combined structure of the gas outlet and the main body of the electrostatic spray compound fine dust removing apparatus may be such that the main body of the electrostatic spray compound fine dust removing apparatus is horizontally formed and the end portion of the main body of the electrostatic spray compound fine dust removing apparatus, And the discharge portion is vertically communicated and discharged to the outside.
The gas outlet may be a valve for discharging the exhaust gas from which fine dust is removed from the main body of the electrostatic spray compound fine dust removing apparatus, and may be discharged by an opening or a closure, or may be discharged by a screw in a fixed amount. .
The apparatus for removing electrostatic mist fine particles according to the present invention is characterized in that the exhaust gas flowing into the main body descends along the inside of the main body of the electrostatic spray compound fine dust removing apparatus and passes through the electrostatic dust collecting unit and then passes through a cleaning unit having a concave structure And then discharged through the gas outlet port through the electrostatic atomizing unit and the mist removing unit. When the cleaning liquid and the gas are raised in the cleaning unit section, the cleaning liquid and the solid particles are separated from each other, so that the solid particles descend and only the gas rises.
Wherein the electrostatic spraying unit comprises: a cleaning liquid jetting unit having a plurality of electrostatic spray nozzles formed therein and having a plurality of cleaning liquid tubes supplied with a cleaning liquid to which an (-) electrode is applied; And a lattice unit to which a (+) electrode having a space for an electrostatic spraying effect of the sprayed cleaning liquid applied with the negative electrode is applied.
The electrostatic atomizing nozzle may include a nozzle body having a nozzle tip through which the cleaning liquid is injected, and a nozzle body formed with a swirler to form a swirl in the cleaning liquid.
The swirler may be inserted into the nozzle body or may be formed in the form of a swivel block on the wall surface of the nozzle body at any time.
An insulator is formed in the cleaning liquid injection unit, which is contacted with the cleaning liquid tube filled with the cleaning liquid supplied with the negative (-) electrode, in order to prevent a shot between the cleaning liquid tube and the cleaning liquid injection unit at all times.
A lattice unit is formed outside the cleaning liquid tube. Wherein the grid unit is an electrode, and the grid unit has an electrostatic spray nozzle of the cleaning liquid tube, the grid unit of the electrostatic spray compound fine dust eliminator body is a hollow space, and an insulator is installed around the cleaning liquid tube .
A plurality of discharge electrodes such as needles or crowns can be radially arranged on the outer circumferential surface of the cleaning liquid tube so as to easily cause discharge. Here, the shape of the discharge electrode favorable to discharge can be variously modified, and the number and interval of the discharge electrodes can be optimized in accordance with the degree of the discharge flame. In addition, the shape, number and interval of the discharge electrodes can be appropriately modified in consideration of the degree of the discharge flame. Particularly, compared with the needle-like type, a discharge electrode such as a crest-like shape having a small area controls the degree of the discharge flame and induces the flow of the fluid inside the main body of the electrostatic spray compound fine dust remover, It can be made to serve as a guiding role.
The cleaning liquid ejecting unit and the lattice unit may be made of a conductor, and more preferably, made of a material such as a steel sheet or stainless steel, aluminum or copper, and the discharge electrode may be made of graphite or tungsten or tantalum or molybdenum, As shown in Fig.
(-) electrode is applied to the cleaning liquid spray unit, and a positive electrode is applied to the outer wall of the main body of the electrostatic spray compound fine dust remover to cause electricity in the particles in the main body 20.
A gap is formed between the cleaning liquid ejection unit and the grating unit.
A droplet ejected from the electrostatic spray nozzle is filled in the gap. Such a droplet is preferably a mixture of water and an ionizing liquid. That is, the gaps mean that they are spaced apart from each other.
Electrostatic spray nozzles are provided on one side of the cleaning liquid tube. The electrostatic spray nozzle is a tubular internal charge spray nozzle, and the shape of the electrostatic spray nozzle is a square or a nozzle tip. The electrostatic spray nozzle is located at the top of the gap.
The electrostatic spray nozzle may be any structure as long as it has a structure for spraying droplets within the gap.
The gap d between the lattice unit and the electrostatic atomizing nozzle may be 30 cm or less in order to form microcavity through the electrostatic spraying effect of the sprayed cleaning liquid. Preferably between 25 and 28 cm.
The shape of the grating unit may be formed in any one of a triangular shape, a square shape, a pentagon shape, a honeycomb shape, a polygonal shape, and a circle shape or in a shape of two or more lattices.
The electrostatic atomizing unit is modular in that it can be replaced and installed in plural.
The modular cleaning liquid ejecting unit and the lattice unit may be provided with sliding rails on one side thereof in order to facilitate replacement and maintenance.
In addition, the modular cleaning liquid ejecting unit and the lattice unit may be formed with connecting members on one side in order to increase the ease of installation.
And an insulator is installed on one side of the cleaning liquid ejection unit or the electrostatic atomizing unit to prevent a short circuit.
At least two of the electric dust collecting units are installed in parallel to each other so as to collect the exhaust gas introduced into the electrostatic spray compound fine dust removing apparatus frame so as to collect the exhaust gas flowing into the gas suction port, A plurality of discharge electrodes provided so as to generate a discharge corresponding to application of a high voltage and one end and the other end of each discharge electrode being positioned between the discharge electrodes and being fixed to a dust collecting frame, And a plurality of dust collecting poles which are provided as far as possible.
The cleaning unit is configured to form a concave structure between the electrostatic dust collecting unit and the electrostatic spraying unit so that the exhaust gas passing through the electrostatic dust collecting unit while receiving the sprayed cleaning liquid from the electrostatic spraying unit .
The cleaning unit may be provided with a cleaning liquid supply port capable of additionally supplying the cleaning liquid.
Further, the cleaning unit may be provided with a cleaning liquid discharge port through which the cleaning liquid can be discharged.
And a plurality of cleaning liquid ejection openings are formed in the curved portion of the cleaning unit such that sufficient gas-liquid contact occurs.
The cleaning liquid jetting ports may have any one of a circular shape, a slit shape, a triangular shape, a square shape, a pentagon shape, a honeycomb shape, and a polygonal shape or two or more shapes.
.
The cleaning liquid may flow on one and / or both sides of the porous distribution plate.
The porous distribution plate may be formed at the front end and / or the rear end of the cleaning liquid ejection opening.
And a plurality of porous distribution plates are formed on the curved portion and the bottom surface of the cleaning unit to uniformize the flow of the exhaust gas.
The mist elimination unit is formed by stacking a plurality of eliminators on a channel, and the eliminator comprises a contact portion and a drain portion bent perpendicularly to one end of the contact portion.
Wherein the liquid droplet is a mixture of water and an ionizing liquid.
The electrostatic atomization compound fine dust removing device may further include a fan. The pump is capable of imparting an easy flow of exhaust gas at the inlet and / or outlet of the main body of the electrostatic spray compound fine dust removing apparatus.
It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims .
As described above, the fine dust removing apparatus combined with the electrostatic spraying system and the electrostatic dust precipitator according to the present invention is particularly suitable for an electrostatic mist fine dust removing apparatus for removing fine dust by causing an electrostatic reaction using water.
10: Electrostatic spray fine dust removal system
100: electric dust collecting unit
110:
120: Dust collector
200: Cleaning unit
210: Cleaning liquid supply port
220: Cleaning liquid outlet
230:
231:
300: Electrostatic spraying unit
310: cleaning liquid injection unit
311: Electrostatic spray nozzle
312: cleaning liquid tube
313: Cleaning liquid injection unit rail
314: cleaning liquid ejection unit connecting member
315: Swivel
316:
317: Nozzle tip
320: Grid unit
321: Grid unit rail
322: Grid unit connecting member
400: mist removal unit
410: Eliminator
411:
420: drain part
500: gas inlet
600: gas outlet
Claims (10)
An electric dust collection unit for primarily exhausting dust in the exhaust gas;
A cleaning unit in which an exhaust gas passing through the electric dust collecting unit passes through while being in contact with a cleaning liquid filled in a lower part thereof and in a gas-liquid contact;
An electrostatic spray unit for bringing the exhaust gas passed through the cleaning unit into contact with the charged droplets jetted to the electrostatic spray nozzle;
A mist removing unit for separating a moving liquid droplet such as an exhaust gas passing through the electrostatic atomizing unit; And
And a gas outlet through which the exhaust gas passing through the mist removing unit is discharged
Wherein the electrostatic spraying unit comprises: a cleaning liquid jetting unit having a plurality of electrostatic spray nozzles formed therein and having a plurality of cleaning liquid tubes supplied with a cleaning liquid to which an (-) electrode is applied; And a grating unit to which a (+) electrode having a space for an electrostatic spraying effect of the sprayed cleaning liquid applied with the (-) electrode is applied,
The electrostatic atomizing unit is a modular type capable of replacing and installing a plurality of electrostatic atomizing units,
Wherein the electrostatic spray nozzle has a nozzle tip through which the cleaning liquid is sprayed, and a swirler which forms a swirl in the cleaning liquid is formed inside the electrostatic spray nozzle.
Wherein an insulator is installed on one side of the cleaning liquid ejection unit or the electrostatic atomizing unit to prevent a short circuit.
At least two of the electric dust collecting units are installed in parallel to each other so as to collect the exhaust gas introduced into the electrostatic spray compound fine dust removing apparatus frame so as to collect the exhaust gas flowing into the gas suction port, A plurality of discharge electrodes provided so as to generate a discharge corresponding to application of a high voltage and one end and the other end of each discharge electrode being positioned between the discharge electrodes and being fixed to a dust collecting frame, And a plurality of dust collecting poles that are provided to the dust collecting fine particulate removing device.
The cleaning unit is configured to form a concave structure between the electrostatic dust collecting unit and the electrostatic spraying unit so that the exhaust gas passing through the electrostatic dust collecting unit while receiving the sprayed cleaning liquid from the electrostatic spraying unit Wherein the electrostatic atomizing fine particulate removing device comprises:
Wherein a plurality of cleaning liquid ejection openings are formed in the curved portion of the cleaning unit so that sufficient gas-liquid contact occurs.
Wherein a plurality of porous distribution plates are formed on the curved portion and the bottom surface of the cleaning unit to uniformize the flow of the exhaust gas.
Wherein the mist removing unit is formed by stacking a plurality of layers of an eliminator on a channel, and the eliminator comprises a contact portion and a drain portion bent perpendicularly to one end of the contact portion. Device.
Wherein the liquid droplet is a mixture of water and an ionizing liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020170032261A KR101852163B1 (en) | 2017-03-15 | 2017-03-15 | An apparatus combined electrostatic spraying with electrostatic precipitator for removing fine particulate matter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020170032261A KR101852163B1 (en) | 2017-03-15 | 2017-03-15 | An apparatus combined electrostatic spraying with electrostatic precipitator for removing fine particulate matter |
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| Publication Number | Publication Date |
|---|---|
| KR101852163B1 true KR101852163B1 (en) | 2018-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020170032261A KR101852163B1 (en) | 2017-03-15 | 2017-03-15 | An apparatus combined electrostatic spraying with electrostatic precipitator for removing fine particulate matter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102099564B1 (en) * | 2018-10-02 | 2020-04-09 | 주식회사 애니텍 | Device for electrostatic spraying based on high voltage with parallel structure |
| KR20200058934A (en) * | 2018-11-20 | 2020-05-28 | 숭실대학교산학협력단 | Apparatus and method to remove oil mist |
| CN112370930A (en) * | 2020-11-17 | 2021-02-19 | 沈耿彪 | Fog-dust compatible multistage centrifugal separation dust remover and dust removing method thereof |
| KR20210156082A (en) * | 2020-06-17 | 2021-12-24 | 한국에너지기술연구원 | Upstream two-stage direct-and- indirect electrospray unit |
| WO2022217237A1 (en) * | 2021-04-07 | 2022-10-13 | Evo America, Llc | Cleaning a cooking system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102099564B1 (en) * | 2018-10-02 | 2020-04-09 | 주식회사 애니텍 | Device for electrostatic spraying based on high voltage with parallel structure |
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| CN112370930A (en) * | 2020-11-17 | 2021-02-19 | 沈耿彪 | Fog-dust compatible multistage centrifugal separation dust remover and dust removing method thereof |
| WO2022217237A1 (en) * | 2021-04-07 | 2022-10-13 | Evo America, Llc | Cleaning a cooking system |
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