KR101965189B1 - Wet Type Dust Collector Using Electrospray and Vortex - Google Patents

Abstract

The present invention relates to a wet type dust collecting apparatus using an electrostatic spraying method in which a high voltage is applied to a dust collecting apparatus provided with a swash plate and a fine droplet is sprayed to remove contaminants contained in the gas. More particularly, And an upper body having an intermediate body, which is located on the lower body and is formed of a side plate, and a gas outlet, which is located at an upper portion of the middle body and discharges the purified gas, A support plate disposed on the side plate and inclined at a predetermined angle, the support plate being disposed on the side plate so as to be opposed to each other, a liquid flow plate disposed on the support plate, A liquid injecting portion injecting a liquid into the gas introduced from the gas inlet; And a power supply unit connected to the main body and the liquid.

Description

[0001] Wet Type Dust Collector Using Electrospray and Vortex [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wet type dust collecting apparatus, and more particularly, to a wet type dust collecting apparatus using an electrostatic spraying method for applying a high voltage to a dust collecting apparatus provided with a swash plate, and spraying fine droplets, .

In the case of incineration of thermal power plants or wastes, various kinds of air pollutants are contained in the gas. Among them, dust having a small particle diameter has harmful effects on environment such as not only inducing respiratory diseases but also inhibiting plant growth .

EPA and the European Union (EPA) and the European Union (EU) are expected to control the fine dust (PM2.5), which is known to be particularly harmful among these air pollutants, To enforce environmental regulations on these substances.

On the other hand, gravity dust collection, inertial dust collection, filtration dust collection, cleaning dust collection, and electrostatic dust collection techniques are generally known dust collection techniques. Gravitational dust collection technology is a technology to sediment particles naturally by the movement of air using the gravity of particles. Inertial dust collection technology uses the principle of dust collection by inertia at the turning point by rapidly changing the direction of gas flow. , It is effective for the removal of relatively large particles, but the fine particles can hardly be removed.

On the other hand, it is known that filtration technology for removing particles by passing a gas through a filter having fine pores and electrostatic dust collecting technology for supplying and removing electricity by supplying electricity to dust are relatively high in dust collection efficiency. However, in the case of filtration technology, since the particles block the minute pores, the throughput of the exhaust gas is drastically lowered, and the frequent replacement of the filter results in an increase in the cost of exhaust gas treatment.

In the electrodeposition technology, the dry process is carried out in the order of particle charging, attachment of dust particles to the particles, desorption of particles attached to the dust collecting electrode, and removal of particles accumulated in the dust collecting electrode. However, unstable corona discharge, Wet electrostatic precipitator, which removes particulate matter from the particles by water, has a problem in that dust collection efficiency is lowered due to re-scattering and back corona depending on the resistivity of particles. Water use, irregular formation of water film on the dust collecting pole, and corrosion are pointed out as serious problems.

Therefore, it is urgently required to develop a new dust collecting apparatus which is economical and has a high removal efficiency in order to effectively remove the air pollutants, particularly the small particles, and to achieve the enhanced atmospheric environment standard.

Korean Patent Publication No. 0150707 Korean Patent Laid-Open Publication No. 2015-0045068

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 a wet type dust collector capable of effectively removing fine contaminants contained in a gas.

Another object of the present invention is to provide a wet type dust collecting apparatus which is easy to operate, has a low maintenance cost, and is capable of reducing the amount of secondary pollutants generated.

In order to solve the above problems, the wet dust collector using the electrostatic spraying method of the present invention includes a lower body 130 having a gas inlet 131 for guiding a gas containing contaminants, A main body 100 formed of an upper body 110 having an intermediate body 120 formed of a plate 121 and a gas outlet 111 positioned above the middle body 120 and discharging purified gas; A supporting plate 140 provided on the side plate 121 and inclined at a predetermined angle and provided at least two on the side plates 121 so as to be opposed to each other; A liquid flow plate (300) positioned above the support plate (140); A liquid injecting part 200 for injecting a liquid into the gas introduced from the gas inlet 131 provided in the space part of the intermediate body 120; And a power supply unit 400 for supplying electric power of different polarity to the main body 100 and the liquid.

Here, it is preferable that one or more of the support plates 140 are provided on the side plate 121 so as to be opposed to each other, and it is more preferable that the support plate 140 is adjustable in the inclination angle.

One end of the support plate 140 is disposed to protrude out of the main body 100 through the side plate 121. The protruding side plate 121 is provided at a predetermined position with an upper body 110, And a support rod 150 connecting the first support member 130 and the second support member 130 may be connected.

In addition, the liquid flow plate 300 is formed of a conductive layer 310 made of a conductive material and a non-conductive layer 320 made of a non-conductive material. Preferably, both ends of the conductive layer 310 are exposed to the outside, It is preferable that a plurality of microchannels 321 are formed on the surface of the conductive layer 310 and / or the nonconductive layer 320.

The liquid spraying unit 200 includes a liquid spraying body 210 having a hollow interior and a plurality of spraying nozzles 221 formed on an outer surface thereof and a liquid spraying body 210 having the liquid spraying body 210 supported on the side plate 121 And a liquid inflow part 230 for supplying liquid to the space part of the liquid injection part body 210. The liquid injection part supporting part 220 may be provided on the outer surface of the liquid injection part body 210, More preferably, the electric field inducing pin 222 is further provided.

The middle body 120 is formed by stacking a plurality of modules in which the side plate 121 and the support plate 140 are coupled, and the module may have any one of a square, a rectangle, a polygon, a circle, and an ellipse Lt; / RTI >

In addition, the stacking direction of the modules can be stacked while maintaining a predetermined angle about the center axis of the module.

According to the wet dust collector using the electrostatic spraying method of the present invention, fine droplets are generated by applying a high voltage, and the fine droplets and the gas containing contaminants are brought into contact with each other, There are advantages.

In the wet type dust collecting apparatus of the present invention, the support plates facing each other are arranged to be inclined at a predetermined angle, so that the gas and the droplet are in contact with each other. Therefore, the removal efficiency of contaminants contained in the gas is high and the inclination angle of the support plate can be adjusted There is an advantage that the dropped pollutants can be rapidly guided downward.

In addition, the upper portion of the support plate is provided with a liquid flow plate including a non-conductive layer made of a hydrophobic material, thereby preventing contamination by the dropped liquid droplets and inducing rapid flow of the droplets.

Furthermore, since the wet type dust collector of the present invention can generate fine droplets, the amount of waste liquid containing particles can be minimized, and the secondary treatment cost can be reduced.

1 is a schematic view of a wet type dust collector using an electrostatic spraying method according to a preferred embodiment of the present invention.
2 is a vertical sectional view of the dust collecting apparatus shown in Fig.
3 is a view for explaining the operating state of the dust collecting apparatus.
4 is an enlarged view of the liquid injection portion.
5 is an enlarged view of the liquid flow plate.
6 is a lamination example of the module.

Hereinafter, a wet type dust collecting apparatus using an electrostatic spraying method according to the present invention will be described with reference to the accompanying drawings.

The use of the terms "comprises", "having", or "having" in this application is intended to specify the presence of stated features, integers, steps, components, parts, or combinations thereof, But do not preclude the presence or addition of features, numbers, steps, operations, components, parts, or combinations thereof.

Also, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

FIG. 1 is a schematic view of a wet type dust collecting apparatus using an electrostatic spraying method according to a preferred embodiment of the present invention, FIG. 2 is a vertical sectional view of the dust collecting apparatus shown in FIG. 1, and FIG. 3 is a view for explaining an operating state of the dust collecting apparatus.

1 to 3, the wet type dust collecting apparatus using the electrostatic spraying method of the present invention includes a main body 100, a support plate 140, a support rod 150, a liquid jetting unit 200, 300, a power supply unit 400, and a liquid supply tank 500.

The main body 100 includes a lower body 130 provided with a gas inlet 131, an intermediate body 120 positioned on an upper portion of the lower body, and a lower body 130 located on an upper portion of the middle body 120. [ And an upper body 110 having an upper surface. A gas inlet 131 is provided on one side of the lower body 130 so that a gas containing contaminants can be introduced into the lower body 130 and an intermediate body 120 is surrounded by a side plate 121. In FIG. 1, four side plates 121 are illustrated. However, the side plates may be six or eight.

The upper body 110 located above the middle body 120 is provided with a gas discharge port 111 through which a clean gas from which pollutants are removed through a dust collecting process described later can be discharged.

The intermediate body 120 is provided with a support plate 140 for fixing a liquid flow plate 300 to be described later. Specifically, the support plate 140, which is made of a conductive material having a predetermined width and a width, is supported by the side plate 121 of the intermediate body 120 and is inclined at a predetermined angle. It is preferable that the support plate 140 is provided at least two on the one side plate 121 and two or more on the other side plate 121 facing the other side plate 121. The gas rising from the lower body 130 It is more preferable to install it in a zigzag shape so that it can sufficiently stay in the space portion of the intermediate body 120.

Meanwhile, the support plate 140 may be installed to adjust the inclination angle of the support plate 140 while being supported by the side plate 121. The moving speed of the rising gas varies depending on the cross-sectional area determined by the inclination angle of the supporting plate 140. Therefore, if a structure capable of adjusting the inclination angle of the supporting plate 140 is employed, It is possible to control the moving speed and residence time of the gas in consideration of the concentration. In addition, when the gas contains contaminants at a high concentration, these contaminants fall down in contact with the liquid, and therefore, when the inclination angle of the support plate 140 is increased, the advantage that the dropped contaminants can be quickly guided downward .

Here, the inclination angle of the support plate 140 can be adjusted by moving the support rod 150 up and down. 1 to 3, one end of the support plate 140 is disposed so as to protrude out of the main body 100 through the side plate 121, and the protruded side plate 121, A support rod 150 is connected to a predetermined position of the support rod 150. One end of the support rod 150 is connected to the upper extension 112 of the upper body 110 and the other end of the support rod 150 is connected to the lower extension 130 of the lower body 130, (Not shown). In addition, the support rod 150 is further provided with a plurality of support rod fixing portions 151 for controlling the vertical movement of the support rods 150.

Therefore, in order to adjust the inclination angle of the support plate 140, the support plate 150 is manually moved up or down so that the support plate 140 can be inclined at a desired angle, The mounting angle of the supporting plate 140 can be freely adjusted by fixing the supporting rod fixing part 151 to the upper surface and / or the lower surface of the upper extension part 112 and / or the lower extension part 132. [

Although not shown in the drawing, a motor (not shown) driving system capable of forming a screw thread on the outer side of the support rod 150 and moving the support rod 150 up or down may be employed.

The liquid injection portion will be described with reference to Fig. As shown in FIGS. 1 to 3, the liquid injector 200 injects a liquid into the gas introduced from the gas inlet 131, and is provided in the space portion of the intermediate body 120. Specifically, the liquid injector 200 is preferably positioned between the support plates 140 provided in a zigzag shape so as to inject liquid efficiently to the rising gas.

The liquid injector 200 includes a liquid injector body 210, a liquid injector support 220, and a liquid inlet 230 that temporarily receive and negatively charge the negatively charged liquid, The liquid injection body 210 is a substantially long circular cylinder having an empty interior and a plurality of injection nozzles 221 formed on the outer surface thereof. The liquid injection part supporting part 220 is provided at one side of the liquid injection part body 210 and functions to fix or support the liquid injection part body 210 to the side plate 121 of the intermediate body 120 . The liquid inflow part 230 is provided with an opening (not shown) for supplying a liquid to the space part of the liquid injection part body 210.

Here, the liquid injection part support part 220 may be fixed to the inside or outside of the side plate 121, and if necessary, a rotation drive motor (not shown) may be provided to rotate the liquid injection part 200 . When the liquid injector 200 is made of a conductive material, in order to prevent electrical conduction between the positively charged main body 100 and the negatively charged liquid injector 200, It is obvious that an insulating insulator (not shown) made of an insulating material is provided at a joint portion between the liquid injecting portion 200 and the main body 100.

On the outer surface of the liquid injector body 210, an electric field induction pin 222 (not shown) having the same minus charge is injected between the injection nozzles 221 so that negatively charged liquids can be injected more finely ) Is further preferably provided.

Next, the liquid flow plate 300 will be described in detail with reference to Fig. 5 (a) is a front view, (b) is a three-dimensional perspective view, and FIG. 5 (c) is a cross-sectional view of the other side. 5A, the liquid flow plate 300 located above the support plate 140 is composed of the conductive layer 310 and the non-conductive layer 320. When the high voltage is applied to the main body 100 and the positive voltage is applied to the main body 100, the conductive layer 310 is charged to the same positive potential via the support plate 140, .

The conductive layer 310 may have a depression 311 having a predetermined width so that the surface of the conductive layer 310 may be exposed to the outside in more detail than both ends of the conductive layer 310. [ And a nonconductive layer 320 is formed on the depression 311. The non-

It is preferable that a plurality of microchannels 321 having a predetermined width and depth as shown in FIGS. 5 (b) and 5 (c) are formed on the upper surface of the conductive layer 310 and the nonconductive layer 320 Do. When the microchannel 321 is formed as described above, the contaminants that have fallen and fallen in the sprayed droplets can rapidly flow downward.

The conductive layer 310 is not particularly limited as long as the conductive layer 310 is electrically conductive, but it is preferable that the conductive layer 310 is formed of a resin made of a hydrophobic material. When the non-conductive layer 320 is formed of a hydrophobic material, it is possible to prevent the droplet from spreading, thereby preventing the non-conductive layer 320 from being contaminated and also allowing the droplets to flow more quickly.

Meanwhile, the liquid flow plate 300 may be detachably attached to the support plate 140 by a known means such as a screw fastening method.

 The principle of electrospray using high voltage is briefly explained as follows. When a high voltage of positive (+) and negative (-) is applied while passing a conductive liquid through a nozzle, ions in a nozzle and a liquid And the repulsive force of the positive ions acting on the curved surface of the liquid is smaller than the surface tension of the liquid when the voltage applied to the electrode is small, Although it is not sprayed, as the voltage increases, the electric force acting on the curved surface of the liquid and the repulsive force of the cations become larger than the surface tension of the liquid, so that the droplet is sprayed on the capillary tip.

The high voltage is not particularly limited as long as it is a voltage capable of electrostatic spraying and destroying the heat of the insulating material. The voltage is preferably 10 kV to 50 kV. The liquid is not particularly limited as long as it is an ionizable liquid. It is preferable that the ionic liquid is dissolved well.

Hereinafter, an operation state of the wet type dust collecting apparatus using the electrostatic spraying method of the present invention will be described with reference to FIG.

The '+' lead wire is connected to the main body 100, the '-' lead wire is connected to the liquid supply tank 500, and a high voltage is applied from the power supply unit 400. At the same time or before, when the liquid in the liquid supply tank 500 is supplied to the liquid jetting unit body 210, the electrostatic force formed between the surface of the conductive layer 310 protruding outward and the liquid jetting unit 200 A fine droplet is generated. These fine droplets collect various kinds of contaminants contained in the gas, then fall down to the surface of the conductive layer 310 or the nonconductive layer 320, flow down along the microchannel 321, The gas is discharged to the outside through the gas outlet 111.

On the other hand, the liquid containing the pollutants is discharged through the waste liquid outlet (not shown) of the lower body.

The middle body 120 is formed by stacking a plurality of modules in which the side plate 121 and the support plate 140 are coupled, and the module may have any one of a square, a rectangle, a polygon, a circle, and an ellipse Lt; / RTI >

In addition, the stacking direction of the modules can be stacked while maintaining a predetermined angle about the center axis of the module. Preferably by 90 DEG rotation about the central axis of the module.

 Having thus described a particular portion of the present invention in detail, those skilled in the art will appreciate that these specific embodiments are merely preferred embodiments and that the scope of the present invention is not limited thereby, It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the invention, and that such modifications and variations are intended to fall within the scope of the appended claims.

100:
110: upper body
111: gas outlet 112: upper extension
113: first through hole
120: intermediate body
121: side plate
130: Lower body
131: gas inlet 132: lower extension
133: Second through hole
140:
150: support rod 151:
200:
210: liquid dispensing body
220: liquid jetting section support
221: injection nozzle 222: electric field induction pin
230: liquid inlet
300: liquid flow plate
310: conductive layer 311: depression
320: nonconductive stratum 321: microchannel
400: Power supply
500: liquid supply tank

Claims (9)

A lower body 130 having a gas inlet 131 for introducing a gas containing pollutants, an intermediate body 120 positioned on the lower body and including a side plate 121, (100) having an upper body (110) provided with a gas outlet (111) through which purified gas is discharged;
A supporting plate 140 provided on the side plate 121 and inclined at a predetermined angle and provided at least two on the side plates 121 so as to be opposed to each other;
A liquid flow plate (300) positioned above the support plate (140);
A liquid injecting part 200 for injecting a liquid into the gas introduced from the gas inlet 131 provided in the space part of the intermediate body 120; And
And a power supply part (400) for supplying electricity to the body part (100) and the liquid having different polarities,
The support plate 140 is adjustable in inclination angle so that one end of the support plate 140 protrudes from the main body 100 through the side plate 121, And a support rod (150) connecting the upper body (110) and the lower body (130) is connected to the lower body (130).
delete delete A lower body 130 having a gas inlet 131 for introducing a gas containing pollutants, an intermediate body 120 positioned on the lower body and including a side plate 121, (100) having an upper body (110) provided with a gas outlet (111) through which purified gas is discharged;
A supporting plate 140 provided on the side plate 121 and inclined at a predetermined angle and provided at least two on the side plates 121 so as to be opposed to each other;
A liquid flow plate (300) positioned above the support plate (140);
A liquid injecting part 200 for injecting a liquid into the gas introduced from the gas inlet 131 provided in the space part of the intermediate body 120; And
And a power supply part (400) for supplying electricity to the body part (100) and the liquid having different polarities,
The liquid flow plate 300 includes a conductive layer 310 made of a conductive material and a non-conductive layer 320 made of a non-conductive material, and both ends of the conductive layer 310 are exposed to the outside. Wet dust collector using atomizing system.
5. The method of claim 4,
Wherein a plurality of microchannels (321) are formed on the surface of the conductive layer (310) and / or the nonconductive layer (320).
The method according to claim 1,
The liquid spraying unit 200 includes a liquid spraying body 210 having an inner space and a plurality of spraying nozzles 221 formed on an outer surface of the liquid spraying unit 200. The liquid spraying unit body 210 supports the liquid spraying body 210 on the side plate 121, And a liquid inflow part (230) for supplying a liquid to the space part of the liquid injection part body (210). The wet type dust collecting device according to claim 1, wherein the liquid injection part supporting part (220)
The method according to claim 6,
Wherein an electric field inducing pin (222) is further provided on an outer surface of the liquid injecting body (210).
The method according to claim 1,
The middle body 120 is formed by stacking a plurality of modules in which the side plate 121 and the support plate 140 are coupled,
Wherein the module has a shape selected from the group consisting of a square, a rectangle, a polygon, a circle, and an ellipse.
9. The method of claim 8,
Wherein the stacking direction of the modules is stacked while maintaining a predetermined angle about the center axis of the module.

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