KR102552175B1 - Dispersion type water film forming member and Vertical wet electrostatic precipitator using the same - Google Patents

Abstract

The present invention relates to a vertical wet electrostatic precipitator for collecting dust using a water film and a water film forming member applied to the electrostatic precipitator.
The present invention is "a single tubular body 75 with upper and lower ends open; a plurality of vertical protrusions 71 radially formed on an upper portion of the outer circumferential surface of the body 75; a locking protrusion 72 protruding outward from an upper end of the vertical protrusion 71; and point-shaped projections 74 formed on the lower portion of the outer circumferential surface of the body 75 at intervals downward from the lower end of the vertical projections 71 and arranged to form a group in which a plurality of layers are alternately arranged. Distributed water film forming member characterized in that it is configured to include, and a discharge path 73 is formed between the point-like projections 74 so that the washing water hits the point-like projections 74 and spreads and flows down ( 70)” is provided.

Description

Dispersion type water film forming member and vertical wet electrostatic precipitator using the same {Dispersion type water film forming member and Vertical wet electrostatic precipitator using the same}

The present invention relates to a vertical wet electrostatic precipitator for collecting dust using a water film and a water film forming member applied to the electrostatic precipitator.

In general, electric dust collectors are installed in incinerators, boiler desulfurization facilities, and other fine dust and harmful gas removal facilities to prevent air pollution.

An electric precipitator usually applies a high voltage of direct current to the discharge electrode from the high voltage generator, but connects the (-) electrode to the discharge electrode, thereby applying (-) charge to the dust particles contained in the air and passing between the discharge electrode and the collection electrode, Dust is removed by inductively attaching it to the collecting electrode, which has a relatively (+) polarity. At this time, it is largely divided into dry and wet cleaning methods depending on the method of cleaning the dust attached to the collecting electrode.

The dry electrostatic precipitator is a method of cleaning by dropping the attached dust by applying an impact to the collecting electrode by rapping (beating the collecting electrode with a hammer). However, since dust having strong adhesiveness or adhesiveness is not easily removed from the collecting electrode, the dust that is not removed causes a problem in that the electrical conductivity of the collecting electrode is lowered and the collecting efficiency is lowered.

The wet type electrostatic precipitator was developed to compensate for the above disadvantages of the dry type electrostatic precipitator, and adopts a method of cleaning by supplying water to the surface of the dust collecting electrode intermittently or continuously. Among them, a method in which a water film is continuously formed on the collecting pole to fundamentally prevent contamination of the collecting pole (collecting plate) while cleaning is very useful for treating dust of resistivity or dust having strong adhesion and age hardening.

As shown in [FIG. 1], a cylindrical dust collecting electrode 120 is installed inside the housing 100, and a rod-shaped discharge electrode 200 is installed at the center of the dust collecting electrode 120. In addition, when a voltage is applied through a high voltage supply device while forming a water film 140 by flowing water from the upper part of the collecting electrode 120 to the inner circumferential surface of the collecting electrode 120, discharge 140 from the discharge electrode 200 toward the water film 140 As this happens, fine particles such as dust are charged and moved toward the collecting electrode by the electric field so that they are collected in the water film flowing down and fall and are removed (Registration Patent 10-0694618 "Overflow cleaning type wet electrostatic precipitator", etc. ).

However, since 100 to 200 wet electrostatic precipitators of this structure are installed in one treatment unit, a serious problem occurs if the level is not maintained. When assembling hundreds of wet electrostatic precipitators, it is impossible to accurately level the water because it is difficult to assemble precisely. A place where it cannot be done occurs, and this phenomenon causes a problem that sparks are formed immediately during discharge or dust is attached to the dust collection pole 120, resulting in poor discharge and loss of function of the dust collector. It leads to the hassle of having to do it, wasting money and time.

In addition, it is difficult to maintain when the level is not accurate, and the inconvenience of having to flow more water to the higher level side as well as the difficulty in control cause the function of the dust collector to deteriorate and shorten the lifespan.

Registered Patent No. 10-1153008 “Wet Electrostatic Precipitator” proposes an improved wet electrostatic precipitator to prevent sparks and increase processing efficiency by maintaining a uniform and constant water film on the surface of a dust collector, as shown in [Fig. 2]. As shown, the cap 50 for forming a water film is coupled to the inner circumferential surface of the collecting electrode 120.

As shown in FIG. 3, the cap 500 is open at the top and bottom, and has a ring-shaped guide groove 510 concave along the outer circumferential surface. It consists of a plurality of nozzles 520 extending to the lower end, and after the water overflowed through the overflow hole 150 flows into the guide groove 510 and moves along the outer circumferential surface of the cap 500, the spiral nozzle 520 ) to be evenly distributed and supplied to the inner circumferential surface of the collector electrode 120 while rotating.

However, since the cap 500 has a rim for fixing to the dust collecting pole 200 protruding from the entire upper section of the outer circumferential surface, when an excessive amount of water flows in through the overflow hole 150, the rising water level rises to the rim. Since it is blocked by the water film, the supply and discharge of the water forming the water film is not smooth.

In addition, when the wet electrostatic precipitator is large, the discharge electrode must be fixed to the upper support and the lower support, but there is a problem in that the water forming the water film falls downward and contacts the discharge electrode and the lower support, resulting in spark discharge.

Registered Patent No. 10-1849183 “Vertical Wet Electrostatic Precipitator” was developed to more smoothly supply and discharge water forming a water film, and prevent spark discharge by blocking water from contacting the discharge electrode and the lower support. However, even with this technology, it is difficult to secure the uniformity of the water film, and it is difficult to form a water film over the entire inner circumference of the collector pole, and there is no means to prepare for spark discharges caused by blockage of the inlet hole.

1. Registered Patent No. 10-0694618 "Overflow cleaning type wet electrostatic precipitator", 2007.03.13. Notice. 2. Registered Patent No. 10-1153008 "Wet Electrostatic Precipitator", 2012.06.04. Announcement. 3. Registered Patent No. 10-1849183 "Vertical Wet Electrostatic Precipitator", 2018.04.18. Announcement.

The present invention improves Registered Patent No. 10-1849183 to quickly form a uniform water film on the entire inner circumferential surface of the collector pole and to prevent spark discharge when the inlet hole is blocked. A dispersed water film forming member and a vertical wet type using the same Its purpose is to provide an electrostatic precipitator

In order to solve the above problems, the present invention is "a single tubular body 75 with upper and lower ends open; a plurality of vertical protrusions 71 radially formed on an upper portion of the outer circumferential surface of the body 75; a locking protrusion 72 protruding outward from an upper end of the vertical protrusion 71; and point-shaped projections 74 formed on the lower portion of the outer circumferential surface of the body 75 at intervals downward from the lower end of the vertical projections 71 and arranged to form a group in which a plurality of layers are alternately arranged. Distributed water film forming member characterized in that it is configured to include, and a discharge path 73 is formed between the point-like projections 74 so that the washing water hits the point-like projections 74 and spreads and flows down ( 70)” is provided.

The point-like protrusions 74 may be arranged in three or more layers so that washing water that hits the point-like protrusions 74 on the upper layer hits the point-like protrusions 74 on the lower layer again and the process of being dispersed is repeated.

The body 75 may extend upward from the top of the vertical protrusion 71 .

In addition, the present invention is a "vertical wet type electric precipitator in which a water film is formed on the inner circumferential surface of the dust collection electrode 62 by washing water supplied from the upper side and the discharge electrode 60 is installed in the inner center of the collection electrode 62, the dust collection electrode ( 62) provided on the upper outer side of the supply tank 13; a plurality of inlet holes 63 spaced apart at regular intervals along the outer circumferential surface of the upper side of the collecting electrode 62; A distributed water film forming member 70 coupled to an upper end of the collecting electrode 62; a discharge water tank 14 provided on the lower outer side of the collecting electrode 62 to form a water film on an inner circumferential surface of the collecting electrode 62 and to receive the washing water flowing down; a plurality of drain pipes 15 discharging washing water accommodated in the discharge water tank 14; A drain separation pipe coupled to the discharge water tank 14 and inserted into the lower end of the dust collecting electrode 62 to prevent spark discharge of the lower support 50 connected to the discharge electrode 60 to prevent the washing water of the discharge water tank 15 from being discharged ( 80); It provides a vertical wet electrostatic precipitator, characterized in that configured to include.

The distributed water film forming member according to the present invention discharges washing water in a uniformly dispersed state to quickly form a uniform water film over the entire inner circumferential surface of the dust collector, and by extending the body of the water film forming member upward, when the inlet hole is blocked The overflow of the washing water can be delayed by the height of the extension, and the response time for normal operation of the vertical wet electrostatic precipitator and clogging of the inlet hole can be secured.

The vertical wet electric precipitator using the above dispersed water film forming member has high dust washing efficiency and low risk of spark discharge, improving dust collection performance, safety and operational convenience.

[Figure 1] shows a cross section of a conventional vertical wet electrostatic precipitator (registered patent 10-0694618, etc.).
[Fig. 2a] and [Fig. 2b] show a prior art (registered patent No. 10-1153008) for evenly forming a water film by a cap configuration.
[Figure 3] is a cross-sectional view of a vertical wet electrostatic precipitator to which the present invention is applied.
[Figure 4] shows an embodiment of a distributed water film forming member provided by the present invention.
[Figure 5] is a cross-sectional view of a state in which the distributed water film forming member is coupled to the upper end of the collecting electrode.
[Fig. 6] is an exploded perspective view of a distributed water film forming member and a collecting pole.
[Fig. 7] is an enlarged view of a portion marked "A" in [Fig. 3].
[Figure 8] shows a comparison between a discharge path formed in an oblique shape at the bottom of the water film forming member of Registered Patent No. 10-1849183 and a discharge path formed by a plurality of dotted protrusions at the bottom of the distributed water film forming member of the present invention.
[Figure 9] is a photograph comparing the water film formed through the water film forming member of Registered Patent No. 10-1849183 and the water film formed through the distributed water film forming member of the present invention.
10 shows a comparison between a state in which the water film forming member of Registered Patent No. 10-1849183 is coupled to the top of the collecting pole and a state in which the distributed water film forming member of the present invention is coupled to the top of the collecting pole.

The present invention improves Patent Registration No. 10-1849183 to quickly form a uniform water film over the entire inner circumferential section of the collector electrode and to prevent spark discharge when the inlet hole is blocked.

Therefore, the specific details for carrying out the present invention overlap considerably with Registered Patent No. 10-1849183, and the effects of the invention that can be obtained from Registered Patent No. 10-1849183 can also be obtained in the present invention. However, the present invention relates to the structure of the dispersed water film forming member 70 improved from the water film forming member 70a of Patent No. 10-1849183 and the action and effect derived differently from Registered Patent No. 10-1849183 by the structure. has technical significance.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention is "a single tubular body 75 with upper and lower ends open; a plurality of vertical protrusions 71 radially formed on an upper portion of the outer circumferential surface of the body 75; a locking protrusion 72 protruding outward from an upper end of the vertical protrusion 71; and point-shaped projections 74 formed on the lower portion of the outer circumferential surface of the body 75 at intervals downward from the lower end of the vertical projections 71 and arranged to form a group in which a plurality of layers are alternately arranged. Distributed water film forming member characterized in that it is configured to include, and a discharge path 73 is formed between the point-like projections 74 so that the washing water hits the point-like projections 74 and spreads and flows down ( 70)” is provided.

The point-like projections 74 of the distributed water film forming member 70 can be arranged in three or more layers, and the process of dispersing the washing water that has hit the point-like projections 74 on the upper layer and collides with the point-like projections 74 on the lower layer again It can be arranged so that it repeats. In addition, the body 75 may be formed to extend above the upper end of the vertical protrusion 71 .

Hereinafter, as shown in [FIG. 4], the point-like projections 74 are arranged in three layers, and the body 75 is based on the distributed water film forming member 70 in which the body 75 extends above the upper end of the vertical projections 71. to explain the invention.

In addition, hereinafter, the distributed water film forming member 70 will be described according to an embodiment applied to the vertical wet electrostatic precipitator of Patent Registration No. 10-1153008, but the distributed water film forming member 70 is registered Patent 10-0694618 It can also be applied to other prior art, such as.

As shown in FIG. 3, the dispersive water film forming member 70 is a vertical wet type electrostatic precipitator in which harmful gases including dust flow into the lower side of the electrostatic precipitator, undergo a purification process from the inside, and then discharge upward. Can be applied to there is.

A gas inlet 11 through which harmful gases flow is formed at the lower end of the vertical wet electrostatic precipitator, a water tank 10 is formed at the inner bottom, and a gas outlet 12 through which purified gas is discharged at the upper end is formed.

In the inner upper and lower parts of the present invention, the upper injection unit 20 and the lower injection unit 30 automatically transfer the washing water of the water tank 10 through the pump P and spray it downward and upward through a plurality of nozzles, respectively. It is installed with the valve.

The upper spray part 20 and the lower spray part 30 are for cleaning the inside after stopping the operation of the electric precipitator, and supply water from the water tank 10 by a pump P and an automatic valve to a plurality of It is flushed through the nozzle.

Below the upper injection part 20, a plurality of upper supports 40 are horizontally coupled at intervals back and forth, and the upper supports 40 are connected to a high voltage supply device V.

A plurality of discharge electrodes 60 are vertically coupled to the upper support 40 at intervals left and right, and a plurality of discharge pins 61 are coupled to the outer circumferential surface of the discharge electrode 60 at intervals vertically.

The lower side of the discharge electrode 60 is coupled to a plurality of lower supports 50 spaced apart in front and rear, and a cylindrical collecting electrode 62 is coupled to the outside of the discharge electrode 60, and the collecting electrode 62 ) has its upper and lower sides open, so that the discharge electrode 60 passes through the center of the collecting electrode 62 and is fixed to the upper support 40 and the lower support 50.

The collector electrode 62 needs to increase the critical surface tension to form a uniform water film on the inner circumferential surface. For this purpose, the roughness can be adjusted through sand blasting to maximize the water spread. Depending on the material, the electrolytic Methods such as polishing, plasma surface treatment, and nano-particle coating can be selected.

A distributed water film forming member 70 made of any one of synthetic resin, rubber, and metal is coupled to the open upper side of the collecting pole 62, and the lower side of the collecting pole 62 is made of any one of synthetic resin, rubber, and metal. The drain separation pipe 80 is coupled.

In addition, a supply tank 13 to which water in the tank 10 is supplied by a pump P is formed outside the upper end of the collecting electrode 62 to which the distributed water film forming member 70 is coupled, and the drainage separation A discharge tank 14 into which washing water from the supply tank 13 falls is formed outside the lower end of the collector pole 62 to which the pipe 80 is coupled, and drain pipes 15 are provided at both ends of the discharge tank 14. It is formed extending toward the water tank 10 side.

On the other hand, as shown in [Fig. 4] and [Fig. 5], the dispersed water film forming member 70 has a body 75 of a single tube type with upper and lower ends open. A plurality of vertical protrusions 71 are radially formed on the upper part of the outer circumferential surface of the body 75 at intervals left and right.

A protrusion 72 is formed at the upper end of the vertical protrusion 71, and the protrusion 72 is for inserting and fixing the body of the distributed water film forming member 70 to the upper end of the collecting pole 62. , It may be formed on all vertical projections 71, but at least two or more are formed throughout the distributed water film forming member 70 and fixed so as to be horizontal.

A discharge path 73 is formed between the point-like projections 74 arranged in a group at the lower part of the vertical projections 71 .

The point-like projections 74 are formed on the lower part of the outer circumferential surface of the body 75 at intervals downward from the lower end of the vertical projections 71, and are arranged so as to form a group in which a plurality of layers are alternately arranged.

As shown in FIG. 6, a plurality of inlet holes 63 are spaced apart at regular intervals along the outer circumferential surface of the upper side of the collecting pole 62, so that the dispersion type water film forming member 70 ) is inserted into and coupled to the top of the dust collection pole 62, the inlet hole 63 is located between the vertical protrusion 71 and the point-like protrusion 74 group.

As shown in FIG. 7, the drainage separation pipe 80 is inserted and coupled to the lower side of the dust collection electrode 62, and has a cylindrical shape with upper and lower sides open so that the discharge electrode 60 can pass through. .

A plurality of protrusions 81 are radially formed on the outer circumferential surface of the upper side of the drain separator pipe 80 at intervals left and right, so that the protrusions 81 are firmly fixed to the inner circumferential surface of the dust collecting pole 62, and the dust collecting pole (62) A gap is formed between the inner circumferential surface and the outer circumferential surface of the drainage separation pipe 80.

In the vertical wet electrostatic precipitator of the present invention configured as described above, the pump P continuously supplies the washing water of the water tank 10 to the supply water tank 13, and the washing water of the supply water tank 13 flows through the inlet hole ( 63) and flows between the vertical protrusions 71 and the point-like protrusions 74 group formed. The washing water collides with the staggered multi-layered staggered protrusions 74 and is dispersed, spreads along the discharge path 74 and flows down to form a water film on the inner circumferential surface of the collector electrode 62.

[Fig. 8] shows a discharge path 73a formed in an oblique shape at the bottom of the water film forming member 70a of Registered Patent No. 10-1849183 and a plurality of dotted protrusions 74 at the bottom of the distributed water film forming member 70 of the present invention. ) It is shown by comparing the discharge path 73 formed by.

In Patent Registration No. 10-1849183, the washing water flows downward along the oblique discharge path 73a and forms a water film around the inner circumferential surface of the collector electrode 62, but as shown in (a) of FIG. 7, the washing water passes through Since the waterway flows down in a split state, the water film is not uniform and there are sections where the water film is not formed.

On the other hand, in the present invention, the washing water hits the point-like protrusions 74 forming a group in which multiple layers are alternately arranged and flows down in a spread state, and as shown in (b) of [Fig. A uniform water film is quickly formed in the section.

[Figure 9] shows a water film formed through the water film forming member of Registered Patent No. 10-1849183 (marked as <prior art>) and a water film formed through the distributed water film forming member of the present invention (marked as <the present invention>). This is a comparison picture.

In the <Prior Art>, it is confirmed that the washing water flows in an oblique line, the flow is bent, and some sections of the water film are thickly formed, and accordingly, there are areas where the water film is not formed. On the other hand, in <the present invention>, it is confirmed that the water film is evenly formed from the top by evenly spreading the washing water.

When a high voltage is applied to the discharge electrode 60 by the high voltage supply device V, the (-) charged dust moves to the (+) charged collecting electrode 62 side, and is collected in the water film to collect the collecting electrode 62 It falls downward along the inner circumferential surface.

In this way, a water film is formed on the entire inner circumferential surface of the collecting electrode 62, and the water flowing down reaches the drainage separation pipe 80, and the space formed on the inner circumferential surface of the collecting electrode 62 and the outer circumferential surface of the drainage separation pipe 80 by the protrusions 81 It reaches the discharge water tank 14 through and is discharged to the water tank 10 along the drain pipe 15.

Therefore, the drain separation pipe 80 and the discharge water tank 14 completely block the contact of the washing water forming the water film on the inner circumferential surface of the collecting electrode 62 with the discharge electrode 60 and the lower support 50, thereby preventing spark discharge. there is.

On the other hand, it often happens that the washing water in the supply tank 13 is excessively supplied through the inlet hole 63. Water, the water level of which rises along the space between the vertical protrusions 71, flows into the upper side of the distributed water film forming member 70 and flows down along the inner circumferential surface to be merged with the water film of the collector electrode 62 or supplied. It is discharged to the water tank (13).

This action is caused by the fact that the locking protrusion 72 for inserting and fixing the water film forming member 70 into the dust collection pole 62 is not formed over the entire outer circumferential surface as in the prior art, but is formed on the upper side of the vertical protrusion 71. This is possible because a space in which water rising along the outer circumferential surface can flow down again through the upper side of the water film forming member 70 is formed.

In addition, the parent body 75 extending above the upper end of the vertical protrusion 71 in the distributed water film forming member 70 performs a function of preventing sparks from occurring when the inlet hole 63 is clogged. .

10 shows a state in which the water film forming member 70a of Registered Patent No. 10-1849183 is coupled to the top of the collecting pole 62 and the distributed water film forming member 70 of the present invention is coupled to the top of the collecting pole 62 It is shown by comparing the condition.

In Registered Patent No. 10-1849183, the locking protrusion 72 is caught on the top of the collecting pole 62 and the water film forming member 70a is fixed, but the inlet hole 63 on the upper side of the collecting pole 62 is blocked [FIG. 8] As shown in (a) of (a), as the washing water immediately overflows, water droplets splash and contact the discharge electrode 60 to generate a spark discharge (spark).

In the present invention, by extending the body 75 of the water film forming member 70 above the upper end of the vertical protrusion 71, the overflow of washing water can be delayed by the height of the extension, and the normal operation and A response time for clogging of the inflow hole 63 can be secured. The extension height can be adjusted as needed.

In the above, the present invention was examined in detail with specific examples. However, the present invention is not limited by the above examples and can be modified and modified within the scope without departing from the gist of the present invention. Accordingly, the claims of the present invention include such modifications and variations.

10: water tank 11: gas inlet
12: gas outlet 13: supply tank
14: discharge tank 15: drain pipe
20: upper injection part 30: lower injection part
40: upper support 50: lower support
60: discharge electrode 61: discharge pin
62: dust collection pole 63: inlet hole
70: Distributed water film forming member 71: vertical protrusion
72: stumbling block 73: discharge path
74: point protrusion 75: body
80: drainage separation pipe 81: protrusion

Claims (5)

a single tubular body 75 with upper and lower ends open;
a plurality of vertical protrusions 71 radially formed on an upper portion of the outer circumferential surface of the body 75;
a locking protrusion 72 protruding outward from an upper end of the vertical protrusion 71; and
Point-shaped projections 74 formed on the lower part of the outer circumferential surface of the body 75 at intervals downward from the lower end of the vertical projections 71, and arranged to form a group in which a plurality of layers are alternately arranged; It is composed of,
A discharge path 73 is formed between the point-like projections 74 so that the washing water hits the point-like projections 74 and spreads down,
Distributed water film forming member (70), characterized in that the body (75) extends above the upper end of the vertical protrusion (71) and is configured to delay the overflow of washing water.
In paragraph 1,
Distributed water film forming member (70), characterized in that the point-like projections (74) are arranged in three or more layers.
In paragraph 2,
Distributed water film forming member (70), characterized in that the point-like projections (74) are arranged so that the washing water that has hit the point-like projections (74) of the upper layer collides with the point-like projections (74) of the lower layer and the process of being dispersed is repeated.
delete A vertical wet electric precipitator in which a water film is formed on the inner circumferential surface of the collecting electrode 62 by washing water supplied from the upper side and the discharge electrode 60 is installed in the inner center of the collecting electrode 62,
a supply water tank (13) provided outside the upper portion of the collecting electrode (62);
a plurality of inlet holes 63 spaced apart at regular intervals along the outer circumferential surface of the upper side of the collecting electrode 62;
Distributed water film forming member 70 according to any one of claims 1 to 3 coupled to the upper end of the collecting electrode 62;
a discharge water tank 14 provided on the lower outer side of the collecting electrode 62 to form a water film on an inner circumferential surface of the collecting electrode 62 and to receive the washing water flowing down;
a plurality of drain pipes 15 discharging washing water accommodated in the discharge water tank 14;
A drain separation pipe coupled to the discharge water tank 14 and inserted into the lower end of the collection electrode 62 to prevent spark discharge of the lower support 50 connected to the discharge electrode 60 in the washing water of the discharge water tank 15 ( 80); A vertical wet electrostatic precipitator, characterized in that configured to include.

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