KR101876342B1 - Wet steam discharging apparatus for electro-penetrative dehydrator - Google Patents

Abstract

The present invention provides a wet steam discharging device for an electro-osmosis dehydrator. The present invention provides a technique capable of improving dehydration efficiency of an electro-osmosis dehydrator by discharging as much steam as possible from a sludge cake right after being dehydrated by an electro-osmosis dehydrator. According to the present invention, the wet steam discharging device for an electro-osmosis dehydrator includes: a casing installed in the electro-osmosis dehydrator so the sludge cake which is separated from a filter cloth moving from a dehydration area of the electro-osmosis dehydrator to the rear side to be fallen flows inside, wherein the casing includes a discharge path for discharging the sludge cake flowing inside, at one end; a pair of paddle transfer devices connected to the casing to rotate and extending in a longitudinal direction of the casing while being parallel inside the casing, wherein the pair of paddle transfer devices are connected to rotate in the opposite direction and are installed to move the sludge cake toward the discharge path while crushing the sludge cake in the casing when rotating; and a rear suction hood installed in the electro-osmosis dehydrator to be installed in the upper part of the casing and connected to a suction pipe.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus for discharging wet steam for an electro-osmotic dehydrator,

More particularly, the present invention relates to a wet steam discharging apparatus for an electro-osmotic dehydrator capable of discharging as much sludge as possible from a sludge cake, that is, .

At present, the sewage discharged from homes and factories is sent to the sewage treatment plant and processed. The sewage treatment process includes a purification process and a sludge treatment process. In the purification process, the sewage is purified to a range where the self-purification of the river can be activated and discharged to a public water such as a river. In the sludge treatment process, The sludge is treated through processes such as concentration and dehydration.

A dehydrator, which is one of the devices used in the sludge treatment process, separates the filtrate from the sludge and is classified into a belt press, a filter press, a screw press, a centrifugal dehydrator, and an electroosmotic dehydrator according to the operation principle. The electro-osmotic dehydrator is a device for dewatering sludge by applying voltage while applying pressure to the sludge, and can be further classified into a drum type and a horizontal transfer type.

The horizontal transfer electro-osmotic dehydrator includes a positive electrode plate and a negative electrode plate disposed above and below the dewatering region, a power source for applying a voltage between the positive electrode plate and the negative electrode plate, and a power source for passing the dewatering region through endless rotation while supporting the sludge. As a main component. Korean Patent No. 10-0956329 (electroosmotic sludge reduction device with screw jack), Korean Patent No. 10-0981640 (electroosmotic sludge reduction device), Korean Patent No. 10-0981641 The above-described horizontal transfer type electro-osmotic dehydrator has been introduced.

The drum-type electro-osmotic dehydrator differs from the horizontal-transfer electro-osmotic dehydrator in that the operation principle thereof is the same, but the anode is in the form of a drum and the cathode is a caterpillar that rotates infinitely slightly away from the outer circumferential surface of the cathode drum. Therefore, in the drum type electro-osmotic dehydrator, the gap between the cathode drum and the cathode caterpillar becomes a dehydration zone, and the filter cloth passes through the upper dehydration zone while rotating the filter cloth while rotating the filter cloth. An example of such a drum type electro-osmotic dehydrator is disclosed in Korean Patent No. 10-1368959 (an electro-osmotic dehydrator having a drying function).

Korean Patent No. 10-0956329 (electroosmotic sludge weight reduction device with screw jack) Korean Patent No. 10-0981640 (Electrolytic sludge weight loss device) Korean Patent No. 10-0981641 (an electroosmotic sludge weight reduction device having a guide member) Korean Patent No. 10-1368959 (electro-osmotic dehydrator with drying function)

In the electroosmotic dehydrator, a voltage is applied between the anode and the cathode which pressurizes the sludge placed in the dehydration zone and dehydration is performed. During the dewatering process, some of the filtrate in which the sludge is faded is separated from the sludge by falling through the filter cloth, and the remainder is evaporated from the sludge which has become hot due to the voltage application.

In this process, the dehydrated sludge, that is, the sludge cake, is separated from the filter cloth and is stored in a separate storage means (such as a hopper). However, the sludge cake immediately after dewatering also has a high temperature of about 60-80 ° C, and it contains wet steam. Therefore, when the sludge cake immediately after dewatering is stored in the upper storage means, the wet steam evaporated from the sludge cake is condensed in the upper storage means, becomes a filtrate, and then sucks into the sludge cake again. Also, there is a problem that the wet steam which has not evaporated from the sludge cake is condensed in the sludge cake to become a filtrate.

The above problems are a major cause of deterioration of the dewatering efficiency of the electro-osmotic dehydrator, and the present invention is based on the discovery that by discharging as much moisture as possible from the sludge cake immediately after dewatering in the electro-osmotic dehydrator, ultimately, And to provide a technique capable of improving the dewatering efficiency.

The present invention relates to an electroosmotic dehydrator comprising a casing having at one end a discharge path for discharging an introduced sludge cake so that a falling sludge cake separated from a filter cloth moving backward in a dewatering region of an electroosmotic dehydrator flows into the electroosmotic dehydrator; And a sludge cake inside the casing is rotatably coupled to the casing so as to rotate in a direction opposite to the direction of the casing, A pair of paddle conveyors arranged to move toward the discharge passage; And a rear intake hood installed in the electro-osmotic dehydrator to be positioned above the casing and connected to the intake pipe.

Wherein one of the pair of paddle conveyors comprises: a rotary shaft coupled with the casing; And a plurality of paddles fixed to the outer surface of the rotating shaft so as to be separated from each other in the longitudinal direction and the circumferential direction of the rotating shaft and being pivoted in the same direction with respect to imaginary lines extending along the circumferential direction of the rotating shaft do.

And the other one of the pair of paddle conveyors includes a neighboring rotary shaft coupled with the casing to be adjacent to the rotary shaft; And another plurality of paddles fixed to the neighboring rotary shafts so as to be separated in the longitudinal direction and the circumferential direction of the neighboring rotary shafts and being rotated in a direction opposite to the direction in which the plurality of paddles are rotated.

The casing is provided so as to extend in a left-right direction perpendicular to the moving direction of the filter cloth, and is provided to have an opened upper surface. Among the rims surrounding the open upper surface of the casing, barrier ribs are provided at the rear edge, which extends in the left-right direction and is located at the rearmost position.

The electroosmotic dehydrator may be a horizontal transfer electroosmotic dehydrator.

In this case, left and right air intake hoods connected to the intake pipe are provided on upper left and right ends of the positive electrode plate positioned above the dehydrating zone in the horizontal transfer electro-osmotic dehydrator.

According to the present invention, as much moisture vapor as possible can be evaporated from the sludge cake separated from the filter cloth and discharged to the outside, ultimately improving the dewatering efficiency of the electroosmotic dehydrator.

Further, according to the present invention, the size of the electro-osmotic dehydrator does not become so large even if a wet-type dehydrator is provided.

Further, according to the present invention, the sludge cake separated from the filter cloth is prevented from dropping to the outside of the casing, and the wet steam evaporating from the sludge cake can be guided to the rear intake hood.

According to the present invention, the wet steam generated when the sludge is dewatered in the dewatering region of the horizontal transfer electro-osmotic dehydrator can also be collected and discharged to the outside.

1 is a perspective view showing a wet chemical vapor discharging apparatus for an electroosmotic dehydrator according to the present invention.
2 is a plan view showing a paddle conveyor installed inside the casing shown in FIG.
3 is a front view showing a state in which the wet vapor discharging device of FIG. 1 is installed in a horizontal transfer type electroosmotic dehydrator.
FIG. 4 is a front view showing a state in which the wet steam discharging device of FIG. 1 is installed in the drum type electro-osmotic dehydrator.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a wet vapor discharging apparatus for an electroosmotic dehydrator according to the present invention will be described in detail with reference to the drawings. It is to be understood that the terminology or words used herein are not to be construed in an ordinary sense or a dictionary, and that the inventor can properly define the concept of a term to describe its invention in the best possible way And should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

The humid vapors exhaust apparatus 100 for an electro-osmotic dehydrator according to the present invention includes a casing 110, a pair of paddle conveyors 130a and 130b, and a rear intake hood 150 as shown in FIG.

The casing 110 is installed in the electroosmotic dehydrators 200 and 300 so that the sludge cake 10 separated from the filter cloth 20 moving backward in the dewatering region of the electroosmotic dehydrators 200 and 300 can be introduced .

Here, the dehydration zone means an area where the sludge is dewatered by the electroosmosis method. If the electroosmotic dehydrator 200 or 300 is a horizontally conveying electroosmotic dehydrator 200, as shown in FIG. 3, the filter fabric 20, which rotates infinitely, supports the sludge supplied from the sludge supply device 220 And then temporarily stopped between the positive electrode plate 230 and the negative electrode plate 240. The area between the positive electrode plate 230 and the negative electrode plate 240 becomes a dehydrating region. When the sludge is placed in the dewatering region, the anode plate 230 is lowered to pressurize the sludge, and then a voltage is applied between the anode plate 230 and the cathode plate 240 to dehydrate the sludge placed in the dehydration region. When the sludge is dewatered, the positive electrode plate 230 rises and the filter cloth 20 starts to rotate infinitely again. Then, in the dewatering region, the dewatered sludge, that is, the sludge cake 10 moves backward from the dewatering region, And then falls into the casing 110. [0052]

If the electroosmotic dehydrator 200 or 300 is a drum type electroosmotic dehydrator 300 as shown in FIG. 4, the filter cloth 20, which rotates infinitely, rotates the sludge supplied from the sludge supply device 320 And then passes between the cathode drum 330 and the cathode cater 340. The area between the cathode drum 330 and the cathode cater 340 becomes a dehydrating area. And is dehydrated by a voltage applied between the cathode drum 330 and the cathode cater 340 when the sludge passes through the dewatering zone. The sludge dehydrated in the dehydrating zone, that is, the sludge cake 10 moves backward in the dehydrating zone, then separates from the filter cloth 20 and drops into the casing 110.

The upper surface 114 of the casing 110 is opened as shown in FIG. 1 so that the sludge cake 10 falling off from the filter cloth 20 and falling can be introduced. The discharge passage 112 is provided at one end of the casing 110 so that the introduced sludge cake 10 can be discharged to the outside. FIG. 1 shows an example in which the upper discharge passage 112 is provided on the lower left end of the casing 110.

The casing 110 may be installed to extend in the lateral direction as shown in FIGS. 1, 3 and 4. Since the filter cloth 20 moves backward from the dewatering area, it can be seen that the casing 110 extends in a direction perpendicular to the moving direction of the filter cloth 20. [ On the other hand, although not shown, the casing 110 may be provided so as to extend in the front-rear direction, that is, to extend rearward from the point where the sludge cake 10 falls from the filter fabric 20. In this case, the upper discharge passage 112 will be located at the lower end of the casing 110. [

The entire length of the electroosmotic dehydrators 200 and 300 becomes longer when the casing 110 is extended in the front-rear direction, and the width of the casing 110 is longer than that of the filter cloth 110. However, The size of the electroosmotic dehydrator dehydrators 200 and 300 must be increased. Therefore, it is preferable that the casing 110 is installed so as to extend in the left-right direction as shown in FIGS. 1, 3 and 4.

In addition, when the casing 110 extends in the left-right direction, the open top surface 114 of the casing 110 is surrounded by front and rear rims extending in the left-right direction and right and left rims connecting the front and rear rims. As shown in FIG. 1, the partition wall 116 is provided as a vertical flat plate at a rear edge located further rearward. This partition wall 116 can prevent some of the sludge cake 10 from falling off the casing 110 beyond the rear edge. In addition, the partition 116 serves to guide wet steam rising in the casing 110 toward the rear suction hood 150. On the other hand, left and right edges of the left and right ends of the barrier rib 116 and the open top surface 114 are fixed to a connecting plate 116a having a substantially triangular shape.

The partition wall 116 can prevent the sludge cake 10 from falling out of the casing 110 and guide the wet steam of the casing 110 toward the rear suction hood 150, Of course. For example, the barrier ribs 116 may be provided in the form of an inclined flat plate inclined forward, or may be provided in the form of a curved plate that extends vertically upward and is bent forward. In addition, the partition 116 may be provided so that a part of the upper end of the partition 116 is connected to the rear intake hood 150.

2, the front paddle transfer unit 130a and the rear paddle transfer unit 130b are disposed in the casing 110. The front paddle transfer unit 130a and the rear paddle transfer unit 130b are spaced apart from each other in the forward and backward directions.

The front paddle feeder 130a includes a front rotation shaft 132a and a plurality of front paddles 134a. The front rotation shaft 132a is provided so as to extend in the left-right direction. The left and right ends of the forward rotation shaft 132a are rotatably coupled to the casing 110. [ At the right end of the forward rotation shaft 132a, a gear 136a located outside the casing 110 is fixed. The gear 136a may be provided at the left end of the forward rotation shaft 132a.

The plurality of front paddles 134a are fixed to the outer surface of the front rotation shaft 132a and are fixed so as to be separated in the longitudinal direction and the circumferential direction of the front rotation shaft 132a. For example, if there is a front paddle 134a, then the front paddle 134a is spaced left from either front paddle 134a and 90 degrees away in the circumferential direction.

Further, the plurality of front paddles 134a are all turned in the same direction with respect to imaginary lines extending along the circumferential direction of the front rotating shaft 132a. The direction in which the front paddle 134a is turned is set so that the front paddle 134a can transport the sludge cake 10 in the casing 110 in the left direction, i.e., the direction in which the discharge path 112 is located. For example, if the front swing shaft 132a rotates in the clockwise direction (arrow direction in Fig. 2) when viewed from the left, the front paddle 134a is turned to the left with respect to the upper imaginary line as shown in Fig. 2 . The angle (A) at which the front paddle 134a is turned may be the same or slightly different for all the front paddles 134a.

The rear paddle conveyor 130b includes a rear rotating shaft 132b and a plurality of rear paddles 134b. The rear rotation shaft 132b is parallel to the front rotation shaft 132a and is adjacent to the rear of the front rotation shaft 132a. The left and right ends of the rear rotation shaft 132b are coupled to the casing 110 in a rotatable manner.

A gear 136b located on the outside of the casing 110 is fixed to the right end of the rear rotation shaft 132b. The gear 132b forms a spur gear with the right gear 136a of the front rotation shaft 132a . Therefore, the rear rotation shaft 132b and the front rotation shaft 132a rotate in opposite directions to each other. For example, when viewed from the left, as shown in FIG. 2, when the rear rotation shaft 132b rotates counterclockwise, the front rotation shaft 132a rotates clockwise.

The right end of the rear rotation shaft 132b is connected to a drive motor 138 located outside the casing 110 by a chain 139. Therefore, when the drive motor 138 rotates, the rear rotation shaft 132b rotates, and at this time, the front rotation shaft 132a rotates in the direction opposite to the rear rotation shaft 132b. Needless to say, the driving motor 138 may be connected to the front rotating shaft 132a and the chain 139. [

The plurality of rear paddles 134b are fixed to the outer surface of the rear rotating shaft 132b in the same manner as the front paddle 134a. However, the direction in which the rear paddle 134b is turned is opposite to the direction in which the front paddle 134a is turned, as shown in FIG. 2, so that even if the rear rotating shaft 132b rotates in the direction opposite to the front rotating shaft 132a, (134b) can transfer the sludge cake (10) from the casing (110) to the discharge passage (112).

On the other hand, the angle A at which the rear paddle 134b is turned may be the same or slightly different from that of all the rear paddles 134b. The angle A between the rear paddle 134b and the front paddle 134a may be the same or slightly different. Further, the front paddle 134a and the rear paddle 134b are arranged so as not to collide with each other at the time of rotation.

When the front and rear paddle conveyors 130a and 130b are provided inside the casing 110, the sludge cake 10 separated from the filter cloth 20 falls between the front and rear rotating shafts 132a and 132b, And is conveyed toward the discharge passage 112 while being broken by the front and rear paddles 134a and 134b. When the sludge cake 10 is broken, as much wet steam as possible from the sludge cake 10 evaporates and rises.

The rear suction hood 150 is installed in the electro-osmotic dehydrators 200 and 300 so as to be positioned on the upper portion of the casing 110 as shown in FIGS. 1, 3 and 4. The rear intake hood 150 is connected to an intake pipe 152 provided with an intake fan (not shown). Therefore, the humid vapors evaporated from the sludge cake 10 in the casing 110 are sucked into the rear suction hood 150 and then discharged to the outside along the suction piping 152.

The wet electrodeposition device 100 for electro-osmotic dehydrator as described above may be provided in the horizontal transfer electro-osmotic dehydrator 200 as shown in FIG. 3, or may be provided in the drum-type electro-osmotic dehydrator 300 as shown in FIG.

When the horizontal wet type electro-osmotic dehydrator 200 is provided, the upper wet-type steam discharging device 100 may further include left and right suction hoods 154 connected to the suction pipe 152. As shown in FIG. 3, the left and right intake hoods 154 are located at the left upper end and the right upper end of the positive electrode plate 230 of the horizontal transfer type electroosmotic dehydrator 200, and are arranged in the front-rear direction. When the left and right intake hoods 154 are provided, wet steam rising from the left and right ends of the anode plate 230 can be sucked into the left and right intake hoods 154 and discharged to the outside when the sludge is dewatered in the dewatering region.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. 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 invention as defined by the appended claims.

10: sludge cake 20: filter cloth
100: Wet steam discharging device for electro-osmosis dehydrator
110: casing 112: exhaust passage
114: open top surface 116:
130a, 130b: paddle feeder 132a, 132b: rotating shaft
134a, 134b: paddle 136a, 136b: gear
138: drive motor 139: chain
150: rear intake hood 152: intake pipe
154: left and right intake hood 200: horizontal transfer type electro-penetration dehydrator
300: drum type electroosmosis dehydrator

Claims (6)

The filter unit is installed in the electroosmotic dehydrator so that the sludge cake separated from the filter cloth moving backward in the dehydration zone of the electroosmotic dehydrator and falling down can be introduced through the open top surface and extends in the left and right direction perpendicular to the moving direction of the filter cloth And a partition wall disposed at a rear edge of the sidewall extending in the leftward and rightward direction and extending rearward from the sidewalls of the casing, the sidewall having a discharge passage through which the sludge cake is discharged, ;
And is rotatably coupled to the casing and is coupled to rotate in opposite directions while being positioned in a direction parallel to the inside of the casing and spaced apart in the forward and backward direction of the filter cloth in a moving direction, A pair of paddle conveyors arranged to break the sludge cake inside the casing and to move toward the discharge passage; And
And a rear intake hood installed in the electro-osmotic dehydrator so as to be positioned above the casing for suction of wet steam rising through an open upper surface of the casing, the rear intake hood being connected to the intake pipe. The method according to claim 1,
Wherein one of the pair of paddle conveyors comprises:
A rotating shaft coupled with the casing; And
And a plurality of paddles fixed to the outer surface of the rotating shaft so as to be separated from each other in the longitudinal direction and the circumferential direction of the rotating shaft and which are all turned in the same direction with respect to imaginary lines extending along the circumferential direction of the rotating shaft ,
The other one of the pair of paddle conveyors comprises:
A neighboring rotating shaft coupled with the casing to be adjacent to the rotating shaft; And
And a plurality of paddles fixed to the neighboring rotary shafts so as to be separated from each other in the longitudinal direction and the circumferential direction of the neighboring rotary shafts and being pivoted in a direction opposite to the direction of rotation of the plurality of paddles, Device. delete delete 4. The method according to any one of claims 1 to 3,
Wherein the electroosmotic dehydrator is a horizontally transporting electroosmotic dehydrator. 6. The method of claim 5,
Wherein the left and right air intake hoods connected to the intake pipe are provided on left and right upper ends of the positive electrode plate positioned above the dehydrating zone in the horizontal transfer electro-osmotic dehydrator.

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