KR102035782B1 - Accumulated sludge treating system and method thereof - Google Patents

Abstract

The present invention relates to a deposited sludge treatment system, which comprises: a reservoir (100) for storing sludge; a coagulant supply device (200) for supplying a coagulant; an ozone generating device for treating the sludge discharged from the reservoir (100) with ozone; an ultrasonic wave generating device (700) for performing a pre-treatment process by applying ultrasonic vibration to the sludge discharged from the reservoir (100); a line mixer (300) for mixing the pre-treated sludge with the coagulant; a condensing and settling tank (400) for condensing the sludge condensed by the line mixer (300); and a filter press (500) for dehydrating the sludge condensed in the condensing and settling tank (400). The coagulant is obtained by mixing one or more of an inorganic coagulant and a polymer coagulant, wherein the inorganic coagulant is one of alum and poly aluminum chloride (PAC).

Description

Sediment sludge treatment system {ACCUMULATED SLUDGE TREATING SYSTEM AND METHOD THEREOF}

The present invention relates to a deposition sludge treatment system.

Previously, sediment sludge was transported to tank lorries using a vacuum suction car, but dumping of sewage sludge was prohibited in 2007 due to the phased revision of the Marine Pollution Prevention Act.

In addition, South Korea has faced many difficulties in dealing with sludge in South Korea, as all of its domestic discharges of wastewater and sediment sludge have been suspended since January 2016 under the London Convention.

Therefore, in Korea, large sludges that have been left in the index tank for one to ten years are treated during factory maintenance and repair, and most of them do not have sludge removal equipment. Is processed.

However, the ratio of egg filtration / dehydration sludge among sediment sludges is about 70%, which makes it difficult to filter / dehydrate the wastewater.

In other words, the egg filter sludge is processed manually using natural pressure rather than through accurate analysis and experiments, and the method is less economical.The sludge is treated in a bag and removed after water removal. This takes a long time and caused a lot of environmental problems due to odor or leachate.

In addition, the conventional sewage sludge treatment system separates water from the sludge and discharges it to the outside. At this time, the discharged purified water is discharged without being properly filtered out of micro flocs. Therefore, conventionally, the fine floc is included in such purified water, and there is a problem of polluting the environment when it is discharged to the surroundings.

Republic of Korea Patent Publication No. 10-0852939 (2008.08.19)

The present invention has been made to solve the conventional problems as described above, the object of the present invention is to improve the leisure / dewatering efficiency of egg filtration / dewatering sludge, and to reduce the sludge treatment time sediment sludge excellent in economics and environmental properties A processing system and method are provided.

In addition, another object of the present invention is to provide a sludge treatment system that can remove the fine floc in the purified water separated from the sludge, and discharge the purified purified water.

The present invention includes the following examples in order to achieve the above object.

An embodiment of the present invention is a storage tank in which the sludge is stored, a coagulant supply device for supplying the flocculant, an ozone generator for ozone treatment of the sludge discharged from the storage tank, and applying the ultrasonic vibration to the sludge discharged from the storage tank to proceed with the pretreatment process. An ultrasonic generator, a line mixer for mixing the pretreated sludge and a flocculant, a flocculation settler for coagulating the sludge agglomerated in the line mixer, and a filter press for dewatering the coagulated sludge in the coagulation sedimentation tank. One or a plurality of polymer coagulants are mixed, and an inorganic coagulant is either alum (ALUM) or polyaluminum chloride (PAC), and the coagulation sedimentation tank coagulates the sludge introduced through the inlet pipe connected to the line mixer and coagulates. A hopper equipped with a discharge screw for discharging the sludge to the filter press, and a sludge discharge pipe Sedimentation tank provided, a purified water discharge unit for discharging the purified water separated from the sludge from the upper side of the sedimentation tank, a vortex generating unit for generating a vortex inside the sedimentation tank, and fine floc included in the purified water moved to the purified water discharge unit (Micro And a filter portion for filtering the purified water passing through the fine floc blocking portion and discharging the purified water passing through the fine floc blocking portion to the purified water discharge portion, and the fine floc blocking portion extends from the top of the floc blocking support plate and the floc blocking support plate. It is possible to provide a deposition sludge treatment system that includes a floc blocking ramp plate extending to be inclined to both sides about the center.

Therefore, in the present invention, sludge flocculation, sedimentation, and dehydration proceeds sequentially to dehydrate condensed and precipitated sludge to produce a solid cake form, which increases the filtration / dewatering efficiency of the sludge and shortens the sludge treatment time. Can be obtained.

In addition, the present invention can be purified so as not to include the fine floc of purified water separated and purified from the sedimentation sludge does not require an additional purification treatment facility by purified water, thereby saving costs, thereby preventing environmental pollution It works.

1 is a block diagram showing a deposition sludge treatment system according to the present invention.
2 is a side view showing the condensation settling tank of FIG.
3 is a plan view showing the top of the condensation settling tank.
4 is a side sectional view showing the top of the condensation settling tank.
5 is a front view illustrating the filter plate 510 of the filter press 500.
6 is a side cross-sectional view of the filter press 500.
7 is a side cross-sectional view showing an embodiment of the operation of the air nozzle of the filter press 500.
8 is a flowchart illustrating a method of treating sludge according to the present invention.

The terms or words used in this specification and claims are not to be construed as limiting in their usual or dictionary meanings, and the inventors may properly define the concept of terms in order to best explain their invention in the best way possible. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

In addition, the terms “… unit”, “… means”, “module”, “device”, etc. described in the specification mean a unit that processes at least one function or operation, which is implemented by a combination of hardware and / or software. Can be.

The term "and / or" throughout the specification should be understood to include all combinations that can be presented from one or more related items. For example, the meaning of "first item, second item and / or third item" may be given from two or more of the first, second or third items as well as the first, second or third items. Any combination of the possible items.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the deposition sludge treatment system and method according to the present invention will be described in detail.

1 is a block diagram showing a deposition sludge treatment system according to the present invention.

Referring to FIG. 1, in the present invention, a storage tank 100 in which sludge is stored, a flocculant supply device 200 for supplying a flocculant, a line mixer 300 for mixing the sludge and a flocculant, and agglomerated in the flocculated sludge A condensation settling tank 400, a filter press 500 for dewatering the settling sludge, an ozone generator 600 installed in the pipe for transporting the sludge to remove odors, and ultrasonic generation for carrying out the pretreatment process by applying ultrasonic waves Device 700.

Storage tank 100 collects and stores sediment sludge. Here, the storage tank 100 is provided with a sludge supply pump 110 to discharge the stored sludge to the line mixer 300.

The flocculant supply device 200 is a device for supplying the flocculant to the line mixer 300. To this end, the coagulant supply apparatus 200 includes a coagulant tank in which one or more coagulants are dissolved and stored, an agitator for mixing the coagulants in the coagulant tank, and a coagulant supply pump 210 for moving to the line mixer 300. do. The dual agglomeration tank and the stirrer have a general configuration, and thus descriptions and drawings have been omitted.

The flocculant is a mixture of one or more of an inorganic flocculant and a polymer flocculant. Of these, the inorganic coagulant may be any one of alum (ALUM), polyaluminum chloride (PAC). Or ferric chloride as auxiliary coagulant.

In this case, it is preferable to connect a strainer (not shown) to the pipe connected to the line mixer 300 in the coagulant supply device 200 to prevent agglomeration of the polymer coagulant.

That is, the flocculant supply device 200 is stirred by dissolving one or more flocculants, and is supplied to the line mixer 300 by the operation of the flocculant supply pump 210.

The ozone generator 600 generates ozone in a pipe connected to the storage tank 100 and / or the line mixer 300 to remove odors of the sludge.

Here, the ozone generator 600 disassembles the viscous material constituting the cell wall of the bacteria, which constitutes the sludge, and decomposes or changes the low-molecular weight polysaccharide component constituting the cell wall. Intracellular plasma (such as monosaccharides and organic acids) is eluted due to the destruction of the cell suits, and foreign substances are decomposed by some ozone oxidizing power to be converted into organic substances that are easily biodegradable. This ozone treatment is known to be effective in removing odors.

For example, when the sludge is stored for a long time in the storage tank 100, the odor is aggravated. Conventionally, in order to prevent the occurrence of civil complaints due to such a bad smell, a cover is installed in the storage tank 100 to prevent the bad smell spread to the outside.

However, in the present invention, the ozone generator 600 is added to the storage tank 100 and / or the pipe to remove odors. This is because even if a mechanical device such as a cover is installed, the odor may spread to the surroundings, which may endanger the health of nearby residents and / or workers.

Therefore, in the present invention, the ozone generator 600 is installed to remove the odor of the sludge from the pipe connected to the line mixer 300 in the storage tank 100 or the storage tank 100 by using the characteristics of the ozone as described above.

The ultrasonic generator 700 performs a pretreatment process before the coagulation process by the flocculant in the line mixer 300. That is, the ultrasonic wave generator 700 generates a ultrasonic reaction in the sludge to destroy the sludge nucleus and the cavity, and generates a OH-radical to react with the organic material to cause a chemical reaction to proceed chemical solubilization of the cell membrane.

For example, the destruction of the sludge nucleus and cavity is classified into stable cavitation and transient cavitation according to the intensity of ultrasound. Stable cavitation is a phenomenon in which cavitation occurs when the intensity of the ultrasonic wave is weak, and the cavities that are grown are not completely destroyed but are broken into small cavities to serve as nuclei for the next cavitation. Cavity is completely destroyed and disappears.

In addition, the chemical reaction by ultrasonic irradiation is caused by the formation and collapse of the cavity, and this chemical reaction causes the OH-Radical reaction to react with the organic material in the cavity, the cavity shell, and the aqueous solution, respectively.

This pretreatment is to proceed before the mixing and stirring with the flocculant in the line mixer 300 can improve the dewatering properties of the sludge can reduce the sludge treatment cost.

The line mixer 300 converts the flocculant supplied through the pipe and the sludge pretreated by the ultrasonic wave generator 700 into the flocculant with agitation. The line mixer discharges the coagulated sludge to the coagulation settling tank 400.

The coagulation sedimentation tank 400 coagulates and precipitates the sludge (coagulant sludge) mixed with the coagulant in the line mixer 300. Here, the condensation settling tank 400 condenses the sludge to the bottom, and discharges purified water separated from the sludge to the outside. Specific actions will be described later. Detailed description of such a condensation settling tank 400 will be described with reference to FIGS.

2 is a side view showing the condensation settling tank of FIG.

Referring to FIG. 2, the condensation settling tank 400 includes a settling tank 440 in which a space for condensation and settling of sludge is formed, a top plate 410 for opening and closing the top of the settling tank 440, and a settling tank 440. Purified water discharge portion formed with a support frame 420 to be spaced apart from the ground, a discharge screw 430 for discharging the condensed sludge from the lower side of the settling tank 440, and a guide passage 482 for discharging purified water to the outside ( 480, a fine floc blocking portion 470 (see FIGS. 3 and 4) for blocking fine flocs, an inflow pipe 450 (see FIGS. 3 and 4) for discharging sludge, and a filter for purifying purified water A portion 490 (see FIGS. 3 and 4) and a vortex generating unit 460 (see FIGS. 3 and 4) for generating a vortex inside the precipitation tank 440.

The sedimentation tank 440 is a structure of the upper and lower straits, the lower side of the hopper (not shown) and the discharge screw 430 is installed, the sludge discharge pipe extending from the hopper (not shown) to discharge the condensed sludge ( 441) is formed.

The support frame 420 is connected to a plurality of rebars extending in the horizontal and vertical directions to support the precipitation tank 440. As shown, the support frame 420 is not shown as being schematically represented only by the pillar. That is, the actual support frame 420 is connected to the column may be further added to the plurality of horizontal and longitudinal reinforcing bars in close contact and / or coupled to the outer surface of the precipitation tank 440. This is generally known and minimizes the drawings.

The upper plate 410 forms the upper surface of the precipitation tank 440, and may be provided with one or more doors that can be opened and closed.

The purified water discharge part 480 discharges purified water passing through the filter part 490 at the edge of the upper plate 410 or the upper end of the precipitation tank 440. Here, the description of the purified water discharge unit 480 will be described as an example of the configuration formed on the top of the precipitation tank 440, which will be described later with reference to FIGS.

Inlet pipe 450 extends into the settling tank 440 to discharge the sludge. The discharge port of the inlet pipe 450 may extend to be adjacent to the lower side of the precipitation tank 440 or may be located above the precipitation tank 440. When the discharge port of the inlet pipe 450 is located adjacent to the lower side of the sedimentation tank 440, the water separated from the sludge and the sludge is filled from the lower side of the sedimentation tank 440.

The fine floc blocking portion 470 blocks the fine floc of purified water that is filled from below on the upper surface of the precipitation tank 440. The microfloc blocking unit 470 will be described later with reference to FIGS. 3 and 4.

The filter unit 490 is installed at the upper edge of the precipitation tank 440 to purify the water purified by the fine floc blocking unit 470 to discharge to the purified water discharge unit 480. The filter unit 490 will be described later with reference to FIGS. 3 and 4.

3 is a plan view showing the top of the condensation settling tank 400, Figure 4 is a side cross-sectional view showing the top of the condensation settling tank 400. 3 is a plan view showing the upper portion of the precipitation tank 440 from which the top plate 410 is removed.

3 and 4, the inlet pipe 450 extends in a direction crossing the top plate 410 and communicates with the support bar 451 supporting the inlet pipe 450 to be introduced into the settling tank 440. . The support bar 451 is a panel extending from one side of the walls of the precipitation tank 440 to the opposite side, the through-hole may be formed in the center side so that the inlet pipe 450 is inserted through.

In addition, the inlet pipe 450 includes a bottleneck section 452 that is narrowed and then expanded again to increase the internal pressure. The bottleneck section 452 is a structure for linkage with the vortex generator 460 to be described later.

Vortex generating unit 460 is a rotation ring 462 fixed to be rotatable in the bottleneck section 452 of the inlet pipe 450, the support rod 464 formed in one direction and integrally formed with the rotation ring 462, Rotating blades 461 rotated at the tip of the support bar 464, and a plurality of injection holes 463 for injecting sludge and water are formed through a plurality of bottle necks 452.

The injection holes 463 are formed at the outer surfaces of the rotary ring 462 and the bottleneck 452, respectively, to discharge sludge and / or water at an increased pressure in the bottleneck 452. As described above, the bottleneck section 452 is a section in which the width is narrowed, and as the internal pressure is increased, the sludge and water inside are sprayed to the outside.

The rotary ring 462 is fixed to be rotatable on the outer surface of the bottleneck section 452 in which the injection hole 463 is formed. Preferably, the rotary ring 462 is formed with a plurality of through holes (hereinafter referred to as injection holes) that coincide with the injection holes 463. Therefore, the rotary ring 462 is rotated along the outer surface of the bottleneck section 452 by the pressure of the sludge and / or water discharged through the injection hole 463.

Support rod 464 is formed integrally with the rotary ring 462. Therefore, the support rod 464 is rotated together with the rotary ring 462.

The rotary blades 461 are fastened to be rotatable at the tip of the support bar 464. Therefore, the rotary blade 461 rotates around the inlet pipe 450 and at the same time, the blade is rotated due to the hydraulic pressure of the sludge discharged through the injection hole 463 to generate the vortex inside.

For example, the purified water is separated from the sludge introduced through the inlet pipe 450 and filled from the bottom of the settling tank 440. In this case, the bottleneck section 452 may inject sludge and / or water due to internal pressure, and the injected sludge and / or water pressurize the rotary ring 462 and / or the rotor blade 461. Therefore, the rotary blade 461 is rotated to generate a vortex so that the purified water rising from the lower side of the precipitation tank 440 has a flow rate and directivity.

That is, in the present invention, the settling tank 440 generates vortices due to the pressure of the sludge and water discharged from the bottleneck section 452 and the operation of the rotary blades 461 to discharge the purified water.

The fine floc blocking portion 470 is arranged at the top of the precipitation tank 440 (for example, the water surface) so that the purified water filling from the lower side may pass through the fine floc before passing through the filter portion 490. It is a plurality of panels consisting of a strainer network is formed fine pores having a diameter of ~ 500㎛.

Alternatively, the microfloc blocking unit may be applied to a nonwoven fabric instead of a strainer.

More specifically, the fine floc blocking portion 470 includes a floc blocking support plate 472 extending from the wall of the sedimentation tank 440 and a floc blocking inclination plate extending to be inclined to both sides about an upper end of the floc blocking support plate 472. 471.

Here, the flock blocking support plate 472 and the flock blocking inclined plate 471 are characterized in that the mesh is formed with a fine through-hole having a diameter of 10 ~ 500㎛. Here, the centers (ie, peak points) of the flock blocking ramp plates 471 are preferably formed to have a height protruding from the water surface.

Conventionally, the inclined plate provided for the discharge of purified water has a dam structure for transferring the purified water to the next process when the purified water reaches a predetermined level, but the flock blocking gradient plate 471 of the present invention is a filter for penetrating the purified water through a strainer rather than a dam structure. There is a difference in form.

Such a filter structure can filter out all the suspended solids floating on the water surface and the microflocs under the water depending on whether the water level is reached, thereby providing cleaner purified water.

In addition, the fine floc blocking portion 470 may further include a plurality of guide plates 473 arranged to be inclined at the bottom of the floc blocking inclined plate 471 to increase the moving distance of the purified water.

The guide plate 473 may induce the purified water filling from the lower side to move to the inner center portion and pass through the larger number of floc blocking ramp plates 471 and the floc blocking support plates 472.

That is, the purified water is moved along the guide plate 473 to the flock blocking slope plate 471 and the flock blocking support plate 472 located at the center of the top of the precipitation tank 440. Therefore, the tablets moved inwardly pass through the microfloc blocking unit 470 located therebetween to be moved to the filter unit 490 positioned outside the upper plate 410.

In addition, the purified water is increased from the lower side of the precipitation tank 440 to the outer filter portion 490 via the inner microfloc blocking portions 470 as the flow rate increased by the vortex generated by the vortex generating portion 460. As it is introduced, microflocs can be completely removed.

The purified water discharge part 480 includes a guide flow path 482 extending along the upper edge of the settling tank 440 and a purified water discharge pipe 481 connected through a discharge hole penetrated through the guide flow path 482.

The guide passage 482 is formed along the upper outer edge of the settling tank 440, and includes first passages 482a and 482a 'having discharge ports to which the purified water discharge pipe 481 is connected, and first passages 482a and 482a'. ) May include second flow paths 482b and 482b '.

The first flow passages 482a and 482a 'are sections in which the purified water discharge pipe 481 is directly connected, and communicates with the filter unit 490.

The second flow paths 482b and 482b 'correspond to sections blocked by the blocking wall 444 that is not communicated with the filter part 490 in the opening of the upper plate 410. Here, the second flow paths 482b and 482b 'are preferably provided to form a bottom surface inclined downward to both sides with respect to the center (for example, the position of the support bar 451).

The second flow passages 482b and 482b 'are used as storage spaces for temporarily storing purified water stagnated in the first flow passages 482a and 482a' according to the diameter of the discharge port. Therefore, it is preferable that the second passages 482b and 482b 'have an inclined bottom surface to guide the purified water to the first passages 482a and 482a'.

The filter unit 490 has an open upper surface, a bottom surface and both side wall surfaces communicating with the first flow passages 482a and 482a 'and the inner wall surface of the precipitation tank 440, and activated carbon and gravel are mixed therebetween. The filter material 492 is filled. Here, both wall surfaces of the filter unit 490 may be formed of a strainer or strainer.

That is, the filter unit 490 is a replaceable case-like structure, the upper surface is open, both side walls serve as the inlet and outlet ports to accommodate the filter material 492 on the inside, detachable from the top of the precipitation tank 440. The structure is possible.

In addition, the precipitation tank 440 may be provided with a weir (443a) on the upper end connected to the filter unit 490. Therefore, both wall surfaces of the filter part 490 communicate with the first flow paths 482a and 482a 'of the purified water discharge part 480 and the weir 443a on the top of the precipitation tank 440, respectively.

Here, the upper end of the precipitation tank 440 may be composed of a weir (443a) and the blocking wall 444, the upper surface of the mutually opposed upper surface communicating with the filter unit 490. Weir (443a) is connected to the filter portion 490, respectively, as the upper wall of the opposite sides of each other, the blocking wall 444 is upright to block the purified water. That is, the blocking wall 444 blocks between the second flow paths 482b and 482b 'and the upper surface of the settling tank 440.

The filter press 500 dehydrates the sludge discharged from the condensation settling tank 400 at high temperature and high pressure to produce and discharge a solid cake sludge C. That is, the filter press 500 produces the sludge solidified and precipitated in the condensation settling tank 400 in the form of a hard solid case.

At this time, the filter press 500 may filter the sludge particles of the solid and at the same time control the moisture content of the case in a dehydrated state through pressure control.

In addition, the filter press 500 in the present invention is provided with a device that can automatically peel off the solid cake sludge (C), which will be described with reference to FIGS.

Fig. 5 is a front view showing the filter plate of the filter press, and Fig. 6 is a side sectional view of the filter press.

5 and 6, the filter press 500 according to the present invention includes a plurality of filter plates 510, a plurality of drying plates 520 filled with sludge between the filter plates 510, and a fixed plate fixed thereto. 530, a movable plate 530 ′ moved by the cylinder 550, and a supply pipe 540 for supplying sludge.

The filter plate 510 is in close contact with the movable plate 530 'and the fixed plate 530, respectively, and the opposite side thereof has a tail plate 510' and a head configured to have a concave grooved wall surface opposed to the drying plate 520. The plate 510 ″ and both surfaces thereof may be divided into a filter plate 510 having a shape of a recessed groove inwardly. Hereinafter, the tail plate 510 ′, the head plate 510 ″, and the filter plate 510 are collectively referred to as the filter plate 510.

The filter plate 510 includes a filtration frame 511, an air nozzle 513 for injecting air into the filtration frame 511, and an air supply pipe 540 for supplying air to the air nozzle 513.

The filtration frame 511 is a plate extending to the outside through the sludge supply passage 517 and the discharge passage 516, the hot air supply passage 518 and the hot air discharge passage 514 is supplied with the drying hot air A squeegee passage 515, a squeegee hole 515a, and the like, through which the inflation air for inflating the rubber sheet 511b forming one surface of the filtration frame 511 is provided, are provided.

Here, one surface of the filtration frame 511 is formed in the concave shape in which the above-described rubber sheet 511b is formed to form an empty space in which sludge is filled between the drying plate 520.

In addition, the filtration frame 511 is expanded by the expansion air introduced through the squeegee passage 515 and the squeegee hole 515a and the rubber sheet for pressing the sludge filled between the drying plate 520 and the filter plate 510 A sealing material 511a for sealing between the 511b and the drying plate 520 may be provided.

The sealing material 511a is an elastic material extending along the outer side of the rubber sheet 511b to prevent a gap between the drying plate 520 and the filter plate 510.

The rubber sheet 511b forms a concave inward surface of the filtration frame 511 and is expanded by the inflation air supplied inwardly through the squeezing passage 515 and the squeezing hole 515a, and the drying plate 520. Pressurized sludge filled between and. The rubber sheet 511b may be formed only on one surface of both surfaces of the filter plate 510.

The air nozzle 513 is fixed to the inclined surface of the upper and / or lower side of the filtration frame 511 to which the rubber sheet 511b is fixed to inject air into the dried sludge to filter the sludge into the filter plate 510 and / or the dry plate ( 520).

The drying plate 520 is a plate material standing up between the filter plates 510 and the sludge discharge port 521 for discharging the sludge introduced through the supply pipe 540 connected through the fixing plate 530, and the drying hot air is discharged. The hot air outlet 522 is provided.

The sludge discharge port 521 discharges the sludge introduced through the supply pipe 540. At this time, the discharged sludge is filled in the empty space between the filter plate 510 and the drying plate 520.

The hot air outlet 522 discharges the drying hot air introduced through the hot air supply passage 518 of the filter plate 510. The drying hot air is dried by evaporating the moisture of the sludge filled between the filter plate 510 and the drying plate 520.

That is, the sludge filled between the drying plate 520 and the filter plate 510 is dried in the form of a cake while the pressure applied as the rubber sheet 511b of the filter plate 510 is expanded and moisture is evaporated by the drying hot air. do.

As the cake sludge C is dried by high temperature and pressure, the cake sludge C tends to stick to one surface of the filter plate 510 and the drying plate 520. Therefore, in the related art, as the cake sludge C may not be completely separated from the filter plate 510 and / or the drying plate 520 and a portion of the cake sludge C is stuck, the worker has to manually remove the residue.

However, in the present invention, as described above, the air nozzle 513 is provided in the filtration frame 511 to completely remove the sludge. That is, the air nozzle 513 is operated by the movable plate 530 ′ to release the close contact between the filter plate 510 and the drying plate 520, and then sprays high pressure air onto the dried cake sludge C to make the cake. Do not allow sludge (C) to remain.

Such an embodiment will be described with reference to FIG. 7. 7 is a side cross-sectional view showing an embodiment of the operation of the air nozzle 513 of the filter press 500.

Referring to FIG. 7, the movable plate 530 ′ is operated by the operation of the cylinder 550 and presses the plurality of filter plates 510 and the drying plate 520 arranged between the fixed plates 530. At this time, the filter plate 510 and the drying plate 520 is maintained in a sealed state between the sealing member 511a.

Thereafter, the sludge is supplied through the supply pipe 540 and is discharged to the sludge discharge port 521 of each drying plate 520 through the sludge supply passage of the filtration frame 511. Therefore, sludge is filled in the empty space between the filter plate 510 and the drying plate 520.

Then, as the air is supplied by the operator, the rubber sheet 511b of the filter plate 510 is expanded while pressurizing the sludge, and the drying hot air is discharged to evaporate the water of the sludge.

When the set time elapses, the movable plate 530 ′ is moved again to release the close contact between the filter plate 510 and the drying plate 520. At the same time or sequentially, the high pressure air is injected into the cake sludge C from the air nozzle 513. Therefore, the cake sludge (C) is not remaining between the filter plate 510 and the drying plate 520 by the high pressure air, it can be removed cleanly.

The present invention includes the above configuration, and hereinafter, the deposition sludge treatment method according to the present invention will be described with reference to FIG.

8 is a flowchart illustrating a method of treating sludge according to the present invention.

Referring to FIG. 8, the present invention includes a step S100 in which sludge is discharged from the storage tank 100, a step S200 in which ozone treatment and pretreatment are performed, and a step S300 in which the flocculant and the sludge are agitated and aggregated in the line mixer 300. , S400 step of condensation and sedimentation in the condensation settling tank 400 and S500 step of dewatering in the filter press 500.

In step S100, the sludge supply pump 110 is operated to supply the sludge accommodated in the storage tank 100 to the line mixer 300 through a pipe.

In step S200, ozone treatment and pretreatment are sequentially performed on the sludge discharged from the storage tank 100 to proceed with odor and chemical and physical pretreatment. The ozone generator 600 disassembles the viscous material constituting the cell wall of the bacteria contained in the sludge discharged from the storage tank 100, decomposes the polysaccharide component constituting the cell wall or changes it into a low molecule, thereby destroying the narrow wall. Eliminate odors

In addition, the ultrasonic generator 700 applies ultrasonic waves to the sludge to generate a physical and / or chemical reaction to improve the dewatering property of the sludge before being mixed and stirred with the flocculant.

Step S300 is a step of condensation by stirring the pretreated sludge and the flocculant in the line mixer 300. Here, the coagulant supplying device 200 operates the stirrer and the coagulant supply pump 210 to mix the coagulants in the coagulation tank and then supply the coagulant to the line mixer 300. At this time, the flocculant is a mixture of one or more of an inorganic flocculant and a polymer flocculant. Of these, the inorganic coagulant may be any one of alum (ALUM), polyaluminum chloride (PAC). Or ferric chloride as auxiliary coagulant.

In addition, a strainer (not shown) may be installed in the pipe connected to the line mixer 300 in the coagulant supply device 200 to prevent agglomeration state of the polymer coagulant.

The line mixer 300 agitates the flocculant supplied through the pipe and the sludge pretreated by the ultrasonic wave generator 700 to discharge the coagulation settling tank 400.

Step S400 is a step of condensing the sludge by separating purified water from the condensation settling tank 400, and discharges the condensed sludge to the filter press 500. Coagulated sludge is introduced into the settling tank 440 through the inlet pipe 450. At this time, the sludge condenses on the lower side of the precipitation tank 440, and is discharged to the outside through the hopper and the sludge discharge pipe 441. The purified water is separated into the sedimentation tank 440 and at the same time, fills the sedimentation tank 440, and is discharged to the outside through the purified water discharge part 480 as its quantity increases.

At this time, the purified water is discharged to the outside by the pressure caused by the bottleneck 452 of the inlet pipe 450 to rotate the rotary ring 462 and the rotary blades 461 of the vortex generating unit 460. Therefore, inside the settling tank 440, the flow of the purified water filled from the lower side by the guide of the purified water by the guide plate 473 and the vortex generated by the vortex generator 460 toward the microfloc block 470 is generated.

Therefore, purified water moves along the guide plate 473 and passes through the flock blocking ramp plate 471 and / or the flock blocking support plate 472 located at the center of the top of the settling tank 440, and the weir of the settling tank 440. It is introduced into the filter unit 490 through the (443a).

The purified water is discharged from the filter unit 490 and discharged to the purified water discharge pipe 481 along the first flow paths 482a and 482a '. Here, the purified water introduced into the first flow passages 482a and 482a 'may not be discharged at the same time depending on the flow rate, and may be stagnant. The purified purified water is temporarily stored in the second flow passages 482b and 482b'.

However, the second passages 482b and 482b 'may induce a flow of purified water along a downward slope to a section connected from the center to the first passages 482a and 482a'.

In addition, the sludge condensed on the lower side of the precipitation tank 440 is discharged through the hopper and the sludge discharge pipe 441 is supplied to the filter press 500.

S500 step is a step of dewatering the sludge in the filter press (500). The filter press 500 dehydrates the sludge discharged from the condensation settling tank 400 at high temperature and high pressure to discharge the sludge.

For example, the filter press 500 includes a plurality of filter plates 510 and a drying plate 520 that are aligned with the fixed plate 530 while the movable plate 530 ′ is operated by the operation of the cylinder 550. Pressurized, sludge is supplied through the supply pipe 540. The sludge is discharged to the sludge outlet 521 of each drying plate 520 through the sludge supply passage 517 of the filter frame 511 to fill the sludge in the empty space between the filter plate 510 and the drying plate 520. do.

The filter plate 510 pressurizes the sludge while the rubber sheet 511b is expanded while the expansion air is supplied, and evaporates moisture of the sludge while the hot air for drying is discharged from the drying plate 520.

When the set time has elapsed, the movable plate 530 'is moved again to release the close contact state between the filter plate 510 and the drying plate 520, and the high pressure air is injected into the cake sludge C simultaneously or sequentially. . Therefore, the cake sludge (C) is not remaining between the filter plate 510 and the drying plate 520 by the high pressure air, it can be removed cleanly.

Embodiments of the present invention described above are merely exemplary, and those skilled in the art will appreciate that various modifications and equivalent other embodiments are possible therefrom.

Therefore, it will be understood that the present invention is not limited to the forms mentioned in the above detailed description. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims. It is also to be understood that the present invention includes all modifications, equivalents and substitutions within the spirit and scope of the invention as defined by the appended claims.

100: storage tank 110: sludge supply pump
200: flocculant supply device 210: flocculant supply pump
300: line mixer 400: condensation settling tank
410: top plate 420: support frame
430: discharge screw 440: sedimentation tank
441: sludge discharge pipe 443a: Weir
450: inlet pipe 451: support bar
452: bottleneck section 460: vortex generator
461: rotary blade 462: rotary ring
463: injection hole 464: support rod
470: fine floc blocking portion 471: floc blocking inclined plate
472: flock blocking support plate 473: guide plate
480: purified water discharge 481: guide flow
481 discharge ports 482a and 482a ': first flow path
482b and 482b ': Second euro 490: Filter part
491 wall 492 filter material
493: bottom 500: filter press
510, 510 ', 510'': filter plate 511: filtration frame
511a: sealing material 511b: rubber sheet
512: air supply pipe 513: air nozzle
520: drying plate 521: sludge outlet
522: hot air outlet 530: fixed plate
530 ': movable plate 540: supply pipe
550 cylinder 600 ozone generator
700: ultrasonic generator

Claims (9)

A storage tank 100 in which sludge is stored;
A flocculant supply device 200 for supplying a flocculant;
An ozone generator for ozonating sludge discharged from the storage tank (100);
Ultrasonic generator 700 for performing a pre-treatment process by applying ultrasonic vibration to the sludge discharged from the storage tank (100);
A line mixer 300 for mixing the pretreated sludge and the flocculant;
A coagulation settling tank 400 which coagulates the sludge aggregated in the line mixer 300; And
It includes; filter press 500 for dewatering the condensed sludge in the condensation settling tank 400, including,
Flocculant
One or more of an inorganic coagulant and a polymer coagulant are mixed,
Inorganic flocculant is any one of alum (ALUM), polyaluminum chloride (PAC),
Condensation settling tank 400
A hopper installed with a discharge screw 430 to condense the sludge introduced through the inlet pipe 450 connected from the line mixer 300 and discharge the condensed sludge to the filter press 500, and the sludge discharge pipe 441. Sedimentation tank 440 having a;
Purified water discharge unit 480 for discharging the purified water separated from the sludge from the upper side of the precipitation tank 440;
A vortex generator 460 for generating a vortex inside the precipitation tank 440;
A fine floc blocking unit 470 for blocking the micro flocs included in the purified water moved to the purified water discharge unit 480; And
It includes; filter unit 490 for filtering the purified water passing through the fine floc blocking unit 470 and discharged to the purified water discharge unit 480;
The fine floc block 470 is
A floc blocking support plate 472 extending from the wall of the precipitation tank 440; And
And a floc blocking inclined plate (471) extending inclined to both sides about an upper end of the floc blocking support plate (472).
The method of claim 1, wherein the flocculant
A deposit sludge treatment system comprising ferric chloride.
delete The method of claim 1, the inlet pipe 450 includes a bottleneck section 452 is narrowed and then expanded again to increase the internal pressure,
Vortex generator 460
Vortex generating unit 460 is a rotary ring 462 fixed to be rotatable in the bottleneck section 452 of the inlet pipe 450, the support rod 464 formed in one direction and integrally formed with the rotary ring 462, Rotating blades 461 rotated at the tip of the support bar 464, and a plurality of through-holes formed in the bottleneck section 452 and the rotary ring 462 to include a plurality of injection holes 463 for injecting sludge and water Sediment sludge treatment system characterized by the above-mentioned.
The method of claim 1, the precipitation tank 440 is
A sewage sludge treatment system, characterized in that a weir (443a) is provided on the upper wall surface communicated with the filter portion (490).
The deposition sludge treatment system of claim 1, wherein the microfloc blocking portion 470 further comprises a plurality of guide plates 473 arranged to be inclined below the floc blocking ramp plate 471 to increase the moving distance of the purified water.
The method of claim 1, wherein the filter unit 490
The upper surface of the upper case of the sedimentation tank 440 is made of a filter mesh 492 is filled in the inner side, the filter wall 492 is formed on both sides is formed with a fine through hole having a diameter of 10 ~ 500㎛ so that purified water flows in and out Sediment sludge treatment system, characterized in that detachable from.
The method of claim 1, wherein the purified water discharge unit 480
First passages 482a and 482a ', which communicate with the filter unit 490, and which discharge ports for purifying water discharge are connected to each other are formed; And
Extending from the first passages 482a and 482a ', the inclined surface inclined downward toward the first passages 482a and 482a' to form a space for temporarily storing purified water stagnated in the first passages 482a and 482a '. A second sludge (482b, 482b ').
The method of claim 1, wherein the filter press 500
A fixed plate 530 to which the movable plate 530 ′ which is driven by the cylinder 550 and the supply pipe 540 to which sludge is supplied are communicated;
A plurality of filter plates 510 and a drying plate 520 which are sequentially stacked between the movable plate 530 'and the fixed plate 530 to pressurize, heat, and dehydrate the sludge packed therebetween.
The filter plate 510 is a sludge treatment system, characterized in that the air nozzle 513 for spraying high-pressure air to the cake sludge solidified between the drying plate 520 is automatically peeled off.

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