KR101259891B1 - Sludge Concentration Apparutus of Multiple Circle Plate Type - Google Patents

Abstract

The present invention relates to a sludge concentrator for adjusting the sludge to a certain concentration suitable for dewatering sludge during the purification process of high concentration organic wastewater, and a sludge treatment system in which the sludge treatment efficiency and dewatering efficiency are improved. In particular, in the present invention, the sludge concentrating device 160 is installed in the flocculation mixing tank 113 of the sludge treatment system 100, so that the desorption liquid is easily removed from the floc formed by flocculation and agitation of the sludge and the flocculant in the flocculation mixing tank 113. The amount of the stripping liquid separated and discharged and separated and discharged is also easily controlled, so that the concentration of the floc injected into the dehydrator is kept uniform. In addition, the present invention has the effect that the dehydrator can be stably operated by maintaining the floc at a uniform concentration, and an appropriate amount of flocculant is added to the flocculation mixing tank according to the concentration of the desorption liquid separated and discharged, thereby increasing the dehydration efficiency.

Description

Sludge Concentration Apparutus of Multiple Circle Plate Type}

The present invention relates to a sludge concentrator, and more particularly, to a sludge concentrator that adjusts to a constant concentration suitable for dewatering sludge. The present invention also relates to a sludge treatment system in which the sludge treatment system and the dewatering efficiency of the sludge are improved.

Recently, as the amount of wastewater is rapidly increased, the pollution problem of the surrounding environment is seriously raised, and various efforts are being made to effectively treat industrial wastewater.

In general, physical / chemical wastewater treatment technology is used for the treatment of high concentration industrial wastewater containing heavy metals, and is separated from water with various chemicals or polymer flocculants, and the heavy metal-containing sludge is dehydrated with various dehydration devices and the cake is dried. It is landfilled or incinerated, and the desorption solution is treated using biological treatment technology and physical / chemical treatment technology.

On the other hand, in the case of a sewage treatment plant, which is a representative facility of biological treatment method, the BOD concentration of sewage flowing into the sewage treatment plant is increased due to the improvement of living standard, and the concentration of microorganisms in the sludge is increased, thereby causing the sludge sedimentation property to decrease. In addition, since the sewage pipe replacement work is carried out as a conduit in which rainwater and sewage are separated and introduced into the existing rainwater and sewage at the same time, the concentration of inorganic solids in the sludge decreases, resulting in poor sedimentation. have. As a result, the performance of the dehydrator and the performance of the digester (sludge reduction device) are caused by the decrease in the concentration of sludge in the sewage treatment plant in the existing installation and operation.

7 is a block diagram of a sludge treatment system according to the prior art.

As shown in FIG. 7, the sludge treatment system of the prior art discharges the supernatant separated by the specific gravity difference between the solid and the liquid in the sedimentation basin 11, and discharges the supernatant, and pumps the precipitated solid to the first pump 21. To the sludge storage tank 12 through the first transfer pipe (31). At this time, the precipitated solids transferred to the sludge storage tank 12 has a severe change in concentration depending on the water temperature, sludge concentration, season, number of draws, and the like.

The sludge stored in the sludge storage tank 12 is transferred to the cohesion mixing tank 13 through the second transfer pipe 32 by the pumping action of the second pump 22. Apart from this, the coagulant administered to separate the water from the sludge is dissolved by the first stirring device 41 in the coagulant dissolving tank 14 and then by the pumping action of the third pump 23, the third transfer pipe 33. It is conveyed to the flocculation mixing tank 13 through. The sludge and flocculant transferred to the flocculation mixing tank 13 are stir-mixed by the 2nd stirring apparatus 42, and a floc is formed as a result. The floc thus formed is transferred to the dehydrator 15 through the fourth transfer pipe 34 to be dewatered. At this time, for stable operation and automation of the dehydrator (15), the flocculated sludge flowing into the dehydrator (15) to have a constant concentration and water as possible in the cohesion mixing tank 13 to make the solid well separated state It is necessary to give.

However, the dosage of the flocculant suitable for the sludge transferred to the flocculation mixing tank 13 is the sludge concentration, the temperature, the particle size change of the precipitated sludge according to the season, in the case of microbial precipitation, the active state of the microorganism, the retention time in the storage tank. Due to various variables such as and storage conditions, proper adjustment is difficult. In addition, the concentration of the sludge transferred to the sludge storage tank 12 is changed due to various reasons such as the number of withdrawal of the precipitated sludge from the sedimentation basin 11 and the change of state of the sedimentation basin 11 according to the season. The sludge concentration fluctuated in (13) and introduced into the dehydrator 15 was severe, resulting in deterioration of the dehydrator 15 and difficulty in proper operation.

8 is a block diagram of another sludge treatment system according to the prior art.

As shown in FIG. 8, the sludge precipitated in the settling basin 51 is transferred to the centrifugal concentrator 52 through the first transfer pipe 71 by the pumping action of the first pump 61. The centrifugal concentrator 52 concentrates the sludge to a certain concentration, and the concentrated sludge is transferred to the sludge storage tank 53 through the second transfer pipe 72 by the pumping action of the second pump 62.

The sludge discharged from the sludge storage tank 53 is transferred to the cohesion mixing tank 55 through the third transfer pipe 73 by the pumping action of the third pump 63. At this time, a concentration meter 57 for measuring the concentration of sludge is provided in the middle of the third transfer pipe 73.

Separately, a part of the flocculant dissolved by the first stirring device 81 in the flocculant dissolution tank 54 is transferred to the flocculation mixing tank 55 through the fourth transfer pipe 74 by the pumping action of the fourth pump 64. Transferred. At this time, the drug is transported to the concentration of the sludge by measuring the concentration of the sludge 57 to control the amount of chemical transport in the feedback control method to the sludge concentration. The sludge and flocculant transferred to the flocculation mixing tank 55 are stirred and mixed by the second stirring device 82 to form a floc, and the floc thus formed is transferred to the dehydrator 56 through the sixth transfer pipe 76. Dehydrated.

However, since the sludge conveyed from the sedimentation basin 51 through the first transfer pipe 71 is concentrated by the centrifugal concentrator 52, it is concentrated using centrifugal force according to the concentration of the sludge precipitated in the sedimentation basin 51 and the sedimentation characteristics. The concentration of the concentration to be concentrated is large and cannot be set to the desired concentration. In addition, the chemicals introduced into the flocculation mixing tank 55 are variable by various parameters as mentioned above without having a correlation only with the concentration of sludge measured by the densitometer 57. Therefore, although the concentration meter 57 is provided, there is a problem in that it is difficult to apply practically because it is not effective.

For various reasons as mentioned above, it is difficult to automatically add the appropriate chemicals to the flocculation mixing tank, and due to the change in the concentration of solids introduced into the dehydrator in the flocculation mixing tank, it is difficult to properly operate the dehydrator, so that the sludge treatment system is used for the operator's sense. It depends on the situation. As a result, there are many problems such as excessive demand of medicine, improper operation of dehydrator, and inadequate management of solids.

The present invention has been made to solve the conventional problems as described above, the first object of the present invention is to provide a sludge thickening apparatus for adjusting to a constant concentration suitable for dewatering the sludge.

In addition, a second object of the present invention is provided with a sludge concentrating device and is provided with a concentration meter and a flow meter for measuring the concentration and flow rate of the sludge introduced into the flocculation mixing tank, the appropriate amount of flocculant is added according to the feedback data measured in this way It is another object to provide a sludge treatment system that improves the treatment efficiency and dewatering efficiency.

Sludge concentrator according to an embodiment of the present invention and the outer casing having an inner space; Cylindrical structure installed in the inner space of the outer casing, a plurality of ring-shaped fixed disks and movable disks are alternately repeatedly stacked so as to have a gap therebetween, and the plurality of fixed disks are formed by being fixedly coupled to each other integrally. and; One or more inlet pipes connected to a lower portion of the outer casing to allow sludge or flocculant to enter the first space between the outer casing and the cylindrical structure; A stirrer for inducing stirring of sludge and flocculant while rotating in the first space; A floc discharge pipe connected to an upper side of the outer casing to discharge the floc formed by agitation of the sludge and the flocculant; And a desorption liquid discharge pipe communicating with a second space formed inside the cylindrical structure and discharging the desorption liquid generated by agitation of the sludge and flocculant introduced into the second space through the gap of the cylindrical structure to the outside. It is done.

Sludge concentrator according to another embodiment of the present invention and the outer casing having an inner space; A cylindrical structure which is installed inside the outer casing, is repeatedly stacked in a plurality of ring-shaped fixed disks and movable disks alternately with a gap therebetween, and is formed by fixedly coupling the plurality of fixed disks integrally with each other; ; One or more inlet pipes connected to a lower portion of the outer casing to introduce sludge or flocculant into a second space formed inside the cylindrical structure; A spiral blade disposed longitudinally at the center of the second space and integrally mounted on an outer surface of the main shaft, the spiral blade for conveying the sludge and flocculant mixed and stirred in a screw manner according to the rotation of the main shaft; A floc discharge pipe connected to an upper side of the cylindrical structure in communication with the second space and discharging a floc formed by agitation of the sludge and the coagulant transferred to the upper portion of the cylindrical structure to the outside; And a desorption liquid discharge pipe connected to the outer casing and discharging the desorption liquid generated by the agitation of the sludge and the coagulant introduced into the first space between the outer casing and the cylindrical structure through a gap of the cylindrical structure to the outside. It features.

The sludge treatment system according to the present invention includes a sedimentation basin in which waste water is stored, a sludge storage tank connected to the sedimentation basin and allowing sludge contained in the waste water to precipitate, a flocculant dissolving tank in which a coagulant is dissolved in an aqueous solution, and the sludge storage tank and the flocculant dissolving tank. And a dehydrator connected to the agglomeration mixing tank so that a resultant formed by agglomeration and agitation of the sludge and the coagulant in the agglomeration mixing tank is introduced into the sludge and the coagulant, respectively. In addition, the sludge treatment system of any one of claims 1 to 12 is installed in the flocculation mixing tank, the sludge and the flocculant is produced so that the resulting sludge and the flocculant is agglomerated and agglomerated separately into a floc and a stripping solution. Wow; A plurality of densitometers and flowmeters respectively installed in the first connection pipe between the sludge storage tank and the flocculation mixing tank and the desorption liquid discharge pipe of the flocculation mixing tank, respectively, for measuring the concentration and flow rate of the sludge in the first connection pipe and the stripping liquid discharge pipe. ; And a pump installed in a second connecting pipe between the flocculant dissolving tank and the flocculating mixing tank, and controlling a flow rate in the second connecting pipe according to the feedback data measured by the densitometer and the flow meter.

The sludge thickening apparatus of the present invention as described above has the advantage of improving the treatment efficiency and dewatering efficiency of the sludge by adjusting to a constant concentration suitable for dewatering the sludge.

In addition, the sludge treatment system of the present invention is provided with a concentration meter and a flow meter for measuring the concentration and the flow rate of the sludge introduced into the flocculation mixing tank as well as the sludge concentrator, respectively, so that a suitable amount of flocculant is added according to the feedback data thus measured. There is an advantage of improving the treatment efficiency and dehydration efficiency.

1 is a block diagram of a sludge treatment system according to an embodiment of the present invention,
FIG. 2A is a schematic diagram showing the sludge concentrating device of the first embodiment installed in the sludge treatment system shown in FIG. 1;
FIG. 2B is an exploded view showing some components of the sludge thickener shown in FIG. 2A;
FIG. 3A is a schematic diagram showing a sludge concentrating device of a second embodiment installed in the sludge treatment system shown in FIG. 1;
FIG. 3b is an exploded view showing some components of the sludge thickener shown in FIG.
4A is a schematic diagram showing a sludge thickening apparatus of a third embodiment installed in the sludge treatment system shown in FIG.
FIG. 4B is an exploded view showing some components of the sludge thickener shown in FIG. 4A;
FIG. 5A is a schematic diagram showing a sludge concentrating device of a fourth embodiment installed in the sludge treatment system shown in FIG. 1;
FIG. 5B is an exploded view showing some components of the sludge thickener shown in FIG. 5A;
FIG. 6A is a schematic diagram showing a sludge concentrating device of a fifth embodiment installed in the sludge treatment system shown in FIG. 1;
FIG. 6B is an exploded view showing some components of the sludge thickening apparatus shown in FIG. 6A;
7 is a configuration diagram of a sludge treatment system according to the prior art,
8 is a block diagram of another sludge treatment system according to the prior art.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the sludge thickening apparatus according to the present invention and a sludge treatment system having the same will be described in detail.

1 is a block diagram of a sludge treatment system according to an embodiment of the present invention.

As shown in FIG. 1, the sludge treatment system 100 according to a preferred embodiment of the present invention is separated into a supernatant and a solid, respectively, in the sedimentation basin 111 due to the difference in specific gravity between the solid and the liquid. Then, the supernatant is discharged, and the precipitated solid (or sludge) is transferred to the sludge storage tank 112 through the first transfer pipe 131 by the pumping action of the first pump 121. The sludge stored in the sludge storage tank 112 is transferred to the cohesion mixing tank 113 through the second transfer pipe 132 by the pumping action of the second pump 122. At this time, the first concentration meter 157 and the first flow meter 158 are installed in the middle of the second transfer pipe 132.

In the sludge treatment system 100, the flocculant is dissolved in water by the first stirring device 141 in the flocculant dissolution tank 114, and the flocculant in the dissolved state is transferred to the third pump 123. It is conveyed to the cohesion mixing tank 113 through the 3rd transfer pipe 134 by a pumping action. At this time, in the sludge treatment system 100, the sludge concentration and the flow rate of the desorption liquid are respectively measured by the second densitometer 175 and the second flow meter 176 provided in the drain 136 which is the discharge line of the flocculation mixing tank 113, The rotation speed of the third pump 123 is adjusted according to the feedback data measured by the second concentration meter 175 and the second flow meter 176 to adjust the amount of the flocculant introduced into the flocculation mixing tank 113.

Then, in the sludge treatment system 100, the solution of the sludge and the flocculant is introduced into the sludge concentrator 160 in the flocculation mixing tank 113, and the sludge and the flocculant are stirred and mixed according to the operation of the sludge concentrator 160. It is then transformed into flocs and desorption fluids. The floc thus formed is transferred to the dehydrator 115 through the fifth transfer pipe 135 to be dewatered, and the desorption liquid separated from the sludge concentrator 160 is discharged through the drain 136.

Due to such a configuration, the sludge dewatering system 100 of the present invention is a flocculant that agitates the sludge according to feedback data measured by the first and second concentration meters 157 and 175 and the first and second flow meters 158 and 176. The amount of is controlled so that the floc having a constant concentration and moisture is introduced into the dehydrator 115. Then, in the sludge dewatering system 100 of the present invention, the dehydrator 115 is stably operated, and the dewatering efficiency is also improved.

In addition, the sludge dewatering system 100 of the present invention is installed in the flocculation mixing tank 113, the sludge concentrator 160 having the following configuration features, not only easy supply of flocculant but also sludge and flocculant more smoothly It is stirred so that the dehydration efficiency in the dehydrator 115 is improved.

FIG. 2A is a schematic view showing the sludge thickening apparatus of the first embodiment installed in the sludge processing system shown in FIG. 1, and FIG. 2B is an exploded view showing some components of the sludge thickening apparatus shown in FIG. 2A.

As shown in Figures 2a and 2b, the sludge thickening device 160 according to the first preferred embodiment of the present invention has a rectangular columnar or cylindrical outer casing 161, the corner of which is processed to a constant radius of curvature. . On the upper side of the outer casing 161, a floc discharge pipe 162a for discharging the floc formed by stirring and mixing the sludge and the flocculant to the outside is formed to extend outward by a predetermined length.

At the bottom of the outer casing 161 that defines the first space S1, which is a mixing space of sludge and flocculant, the sludge from the outside, that is, the sludge storage tank 112, into the first space S1 of the outer casing 161. Sludge inlet pipe 163 for introduction is formed extending to the outside by a predetermined length. The sludge inlet pipe 163 communicates with the second transfer pipe 132 extending from the sludge storage tank 112. In addition, at the bottom of the outer casing 161, the coagulant inlet pipe 164 is formed to extend to the outside by a predetermined length in the adjacent position of the sludge inlet pipe 163. The coagulant inlet pipe 164 communicates with the fourth transfer pipe 134 extending from the coagulant dissolution tank 114.

Meanwhile, a main shaft 165 connected to the motor is disposed in the longitudinal direction at the inner center of the outer casing 161, and a drive motor 166 is disposed at the outer side of the outer casing 161 to rotate the main shaft 165. do. At this time, the drive motor 166 is fixedly supported at the center position of the upper wall (not shown) of the outer casing 161, and operates by receiving power from an external electric supply source (not shown).

The main shaft 165 extends across the outer casing 161 in the vertical direction, and a paddle-type stirrer 168 is disposed around the main shaft 165. The stirrer 168 is a vertical rod 168a extending in a direction parallel to the main axis 165 in the outer casing 161, that is, the longitudinal direction of the outer casing 161, and a vertical rod 168a to support it. It consists of a horizontal rod 168b extending between the upper ends of and fixed to the main shaft 165. Since the middle portion of the horizontal rod 168b is integrally fixed to the main shaft 165, the stirrer 168 rotates together in the same rotational direction as the main shaft 165 when the main shaft 165 rotates. The stirrer 168 rotates together during the rotation operation of the main shaft 165 to coagulate and stir the sludge and the coagulant in the first space S1.

On the other hand, the rotating bar 169 is integrally mounted to the main shaft 165 located radially inward of the stirrer 168. The rotary bar 169 has a similar configuration to the paddle type stirrer 168. In detail, the rotation bar 169 is a vertical rod 169a extending in a direction parallel to the main shaft 165, that is, the longitudinal direction of the outer casing 161, and an upper portion of the vertical rod 169a to support it. And horizontal rods 169b fixed to the main shaft 165 by horizontally extending from the lower and lower portions, respectively. Since the inner end of the horizontal bar 169b is fixed to the main shaft 165, the rotation bar 169 rotates in the same rotational direction as the main shaft 165 when the main shaft 165 rotates.

Around the outer side of the main shaft 165, the upper plate 181, the movable disc 167b and the stationary disc 167a, and the cylindrical support structure of the lower support structure 182 is laminated, wherein the lower support structure 182 is rotated Located at the bottom of the bar 169. Then, the upper plate 181, the movable disc 167b and the stationary disc 167a, and the lower support structure 182, which are integrally coupled, form the screen-shaped cylindrical structure 180 having a predetermined gap G. The inside of the second space S2 is provided.

The main shaft 165 extending from the driving motor 166 passes through the upper plate through hole 183 formed through the center of the upper plate 181 and passes through the ring-shaped movable disc 167b and the fixed disc 167a. Extend into the support structure 182. At this time, the plurality of movable discs 167b and the fixed discs 167a are sequentially stacked alternately in the vertical direction, and a gap G is formed therebetween.

A plurality of fastening protrusions 167c protrude from the radially inner side of the fixed disc 167a, and pin insertion holes 167d are formed in the center of the fastening protrusion 167c, respectively. The fixed disc 167a is arranged such that the pin insertion holes 167d are positioned on the same line in the longitudinal direction, and the fastening pins 167g are inserted into the respective pin insertion holes 167d, and the fastening nuts 167h. It is fixed by). As a result, the plurality of stationary disks 167a are coupled to each other.

Each of the fastening pins 167g is fitted with a ring-shaped spacer 167f having a height thicker than the thickness of the movable disc 167b between the plurality of fixed discs 167a. For this reason, the gap G is formed between the fixed disk 167a and the movable disk 167b.

As described above, the plurality of stationary disks 167a and the movable disks 167b are repeatedly stacked alternately with each other, such that the cylindrical structure 180 is formed inside the outer casing 161. At this time, the outer diameter of the movable disk 167b is larger than the outer diameter of the fixed disk 167a, and the rotation diameter of the rotary bar 169 is formed like the outer diameter of the fixed disk 167a. Due to such a configuration, when the rotary bar 169 rotates, the movable disc 167b constantly swings relative to the stationary disc 167a.

On the other hand, on the radial side wall of the lower support structure 182, the desorption liquid discharge pipe 162b is formed to extend to the outside by a predetermined length. The desorbing liquid discharge pipe 162b extends from the radial sidewall of the lower support structure 182 and communicates with the drain 136 disposed under the cohesion mixing tank 113.

Hereinafter, an operation process of the sludge treatment system 100 provided with the sludge concentrating device 160 according to the first embodiment of the present invention will be described.

First, the solid precipitated in the sedimentation basin 111 is transferred to the sludge storage tank 112 through the first transfer pipe 131 by the pumping action of the first pump 121. The sludge stored in the sludge storage tank 112 is transferred to the cohesion mixing tank 113 through the second transfer pipe 132 by the pumping action of the second pump 122.

Separately, the flocculant administered to separate the sludge from the water is dissolved in the flocculant dissolution tank 114 and then pumped into the flocculation mixing tank 113 through the fourth transfer pipe 134 by the pumping action of the third pump 123. Transferred.

The sludge and flocculant transferred to the flocculation mixing tank 113 are easily stirred and mixed in the sludge concentrator 160 to efficiently form flocs and desorption liquid. In the sludge treatment system 100 of the present invention, the amount of flocculant introduced into the sludge concentrator 160 is measured by the first and second concentration meters 157 and 175 and the first and second flow meters 158 and 176. By controlling according to the feedback data, the concentration of the sludge injected into the dehydrator 115 is kept constant, and the stable operation and dehydration efficiency of the dehydrator 115 is improved.

Operation in the sludge thickener 160 is as follows. The sludge and flocculant are introduced into the first space S1 of the sludge concentrator 160 through the sludge inlet tube 163 and the flocculant inlet tube 164. In addition, while the main shaft 165 is driven to rotate according to the operation of the drive motor 166, the stirrer 168 rotates about the main shaft 165, and the sludge and the coagulant are aggregated from the lower layer of the first space S1. It is gradually moved to the upper portion with stirring.

Further, the fine flocks attached to the radially outer surface of the cylindrical structure 180 are separated by the vertical rods 169a of the rotation bar 169 interlocking with the stirrer 168, so that the flocks in the first space S1 eventually end up. It is discharged to the outside of the outer casing 161 through the floc discharge pipe 162a.

In addition, the desorbing liquid flows into the second space S2 through the gap G of the cylindrical structure 180 as the movable disc 167b swings, and finally, the outside of the outer casing 161 through the desorbing liquid discharge pipe 162b. Is discharged.

In this case, the floc in a flocculated state, if the sludge flows from the flocculation mixing tank 113 and the appropriateness of the chemicals, most solids are formed to have a floc having a size of 1 mm or more, and the concentration of the desorption solution has a substantially constant ss concentration.

FIG. 3A is a schematic view showing a sludge thickening apparatus of the second embodiment installed in the sludge processing system shown in FIG. 1, and FIG. 3B is an exploded view showing some components of the sludge thickening apparatus shown in FIG. 3A.

The sludge thickener 260 according to the second preferred embodiment of the present invention has the same configuration and function as the sludge thickener 160 shown in FIGS. 2A and 2B except for a partial configuration of the cylindrical structure 280. The description of the overlapping configuration will be omitted.

As shown in FIGS. 3A and 3B, in the sludge thickening apparatus 260 according to the second preferred embodiment of the present invention, an annular protrusion 267e is formed at one side of the radially outer surface of the movable disc 267b, and such a protrusion is provided. A hole is formed to penetrate inside 267e. In the present invention, the projections 267e of the movable disc 267b are arranged on the same line in the longitudinal direction, and the vertical rods 269a of the rotation bar 269 are sequentially fitted to the projections 267e. Due to such a configuration, in the present invention, as the rotary bar 269 rotates, the plurality of movable discs 267b are equally interlocked, and the desorption liquid is separated and discharged into the second space S2 more smoothly.

3A and 3B, reference numerals shown in FIGS. 3A and 3B include a gap G, a first space S1, an outer casing 261, a floc discharge pipe 262a, a desorption liquid discharge pipe 262b, and a sludge inflow pipe 263. ), Coagulant inlet pipe 264, spindle 265, drive motor 266, fixed disc 267a, fastening protrusion 267c, pin insertion hole (267d), spacer (267f), fastening pin (267g), Fastening nut 267h, agitator 268, vertical rod 268a, horizontal rods 268b and 269b, top plate 281, and lower support structure 282.

FIG. 4A is a schematic diagram showing a sludge thickening apparatus of the third embodiment installed in the sludge treatment system shown in FIG. 1, and FIG. 4B is an exploded view showing some components of the sludge thickening apparatus shown in FIG. 4A.

As shown in Figs. 4A and 4B, the sludge thickening device 360 according to the third preferred embodiment of the present invention has a rectangular columnar or cylindrical outer casing 361 whose corners are processed with a constant radius of curvature. . On the upper side of the outer casing 361, a floc discharge pipe 362a for discharging the floc formed by stirring and mixing the sludge and the flocculant to the outside is formed to extend outward by a predetermined length, and the desorption liquid is discharged under the outer casing 361. The desorbing liquid discharge pipe 362b is formed to extend outward by a predetermined length.

An inner bottom surface of the outer casing 361 is provided with a lower support structure 382 in the shape of a cylindrical enclosure, and ring-shaped stationary disks 367a and movable disks 367b are mutually formed on the upper portion of the lower support structure 382. The upper support structure 381 in the shape of a cylindrical enclosure is installed on the top of the structure consisting of the fixed disks 367a and the movable disks 367b stacked alternately and repeatedly. As a result, inside and outside the casing 361, the upper and lower support structures 381 and 382 and the cylindrical structure 380 consisting of a plurality of stationary disks 367a and movable disks 367b are formed, and the floc discharge pipe 362a ) Is extended to be in communication with the upper support structure 381.

The inner bottom surface of the outer casing 361 is connected to the sludge inlet tube 363 and the coagulant inlet tube 364 extending outward by a predetermined length, respectively. The wastewater sludge contained in the sludge storage tank 112 is introduced into the second space S2 of the cylindrical structure 380 through the sludge inflow pipe 363, and the flocculant is introduced into the cylindrical structure 380 through the coagulant inflow pipe 364. It flows into the 2nd space S2.

The main shaft 365 is disposed in the longitudinal direction at the inner center of the cylindrical structure 380, and a spiral wing 365a is integrally mounted on a part of the outer surface of the main shaft 365. Then, the blade 365a rotates according to the operation of the drive motor 366 connected to the main shaft 365, and transfers the sludge and the coagulant mixed and stirred in a screw manner to the upper portion.

The fixed disk 367a and the movable disk 367b are laminated | stacked and arrange | positioned with the following structures. One or more protrusions 367e are formed on the radially outer surface of the stationary disc 367a. The plurality of fixing discs 367a are fitted with the fastening rod 370 to the protrusion 367e with the protrusions 367e arranged in a line in the longitudinal direction, and the fastening rod 370 is fixed by the fastening nuts 367h. do. At this time, a spacer 367f having a height greater than the thickness of the movable disc 367b is fitted into the fastening rod 370 so as to be positioned between the plurality of stationary discs 367a. For this reason, between the fixed disk 367a and the movable disk 367b, the predetermined distance is spaced apart by the difference between the height of the spacer 367f and the thickness of the movable disk 367b, thereby forming a gap G at a predetermined interval. At this time, in the present invention, the inner diameter of the movable disc 367b is smaller than the inner diameter of the fixed disc 367a, and the diameter of the blade 365a is larger than the inner diameter of the movable disc 367b but smaller than the inner diameter of the fixed disc 367a. Is formed.

Then, according to the present invention, as the main shaft 365 rotates, the blade 365a abuts on the movable disc 367b and the movable disc 367b swings, so that the desorption liquid is cylindrical with the outer casing 361 in the second space S2. The first space (S1) between the structure 380 is discharged more smoothly.

In the sludge concentrating device 360 of the present invention configured as described above, the sludge and the coagulant are introduced into the second space S2 and coagulated and agitated with the floc and the stripping solution. In addition, in the present invention, the flocculant is separated and discharged into the gap G of the cylindrical structure 380 while the floc moves upward according to the operation of the blade 365a. Then, in the present invention, the floc is finally transferred to the dehydrator 115 through the floc discharge pipe 362a, and the stripping liquid is discharged to the drain 136 through the stripping liquid discharge pipe 362b.

FIG. 5A is a schematic view showing a sludge thickening apparatus of the fourth embodiment installed in the sludge processing system shown in FIG. 1, and FIG. 5B is an exploded view showing some components of the sludge thickening apparatus shown in FIG. 5A.

The sludge thickening apparatus 460 according to the fourth preferred embodiment of the present invention is the sludge thickening apparatus 360 shown in FIGS. 4A and 4B except that the rotating bar is additionally installed inside the cylindrical structure 480. ) And the description of the overlapping configuration will be omitted.

The rotating bar includes a vertical rod 469a which abuts on the inner surface of the cylindrical structure 480, and a horizontal rod 469b that connects the end of the vertical rod 469a and the main shaft 465. In addition, unlike the third embodiment, the sludge thickening apparatus 460 of the present invention is formed such that the inner diameter of the movable disc 467b is smaller than the inner diameter of the stationary disc 467a, and the rotation diameter of the rotating bar is lower than that of the movable disc 467b. It is formed larger than the inner diameter. In addition, the diameter of the blade 465a is formed smaller than the rotation diameter of the rotary bar and the inner diameter of the movable disc 467b.

Due to this, the sludge concentrator 460 of the present invention is only the floc is conveyed upward by the operation of the blade 465a, while the vertical rod 469a swings the movable disc 467b due to the rotation of the rotating bar. By removing foreign substances such as fine flocs attached to the inner surface or the gap G of the cylindrical structure 480, the desorption liquid is easily separated and discharged from the second space S2 to the first space S1.

5A and 5B, reference numerals denote the outer casing 461, the floc discharge pipe 462a, the desorption liquid discharge pipe 462b, the sludge inlet pipe 463, the flocculant inlet pipe 464, and the spindle 465. ), The drive motor 466, the protrusion 467e, the spacer 467f, the fastening nut 467h, the fastening rod 470, the upper support structure 481, and the lower support structure 482.

6A is a schematic view showing a sludge thickening apparatus of the fifth embodiment installed in the sludge processing system shown in FIG. 1, and FIG. 6B is an exploded view showing some components of the sludge thickening apparatus shown in FIG. 6A.

In the sludge thickening apparatus 560 according to the fifth preferred embodiment of the present invention, except that the vertical rod 569a of the rotary bar installed inside the cylindrical structure 580 is integrally coupled with the movable disc 567b. The description of the overlapping configuration of the sludge concentrator 460 illustrated in FIGS. 5A and 5B is the same as that of the function of the sludge concentrator 460.

That is, at least one second protrusion 567i is formed on the radially inner surface of the movable disc 567b, and a hole is formed inside the second protrusion 567i. Then, in the present invention, the vertical rod 569a of the rotary bar is fitted into the hole of the second protrusion 567i, and the movable disc 567b is also linked with the rotation of the rotary bar. At this time, the rotation diameter of the rotating bar is the same as the inner diameter of the fixed disk 567a and the inner diameter of the movable disk 567b, and is formed larger than the diameter of the blade 565a. As a result, the sludge concentrator 560 of the present invention can easily remove foreign substances such as fine flocks fitted into the gap G of the cylindrical structure 580 as the movable disc 567b rotates, so that the desorption liquid is more easily removed. The second space S2 is separated and discharged from the first space S1.

6A and 6B, the non-explained reference numerals are the outer casing 561, the floc discharge pipe 562a, the desorption liquid discharge pipe 562b, the sludge inlet pipe 563, the coagulant inlet pipe 564, and the spindle 565. ), Drive motor 566, first protrusion 567e, spacer 567f, fastening nut 567h, fastening rod 570, horizontal rod 569b, upper support structure 581, lower support structure 582 )to be.

Results and Discussion

The concentration of sludge introduced into the flocculation mixing tank 113 was 10,000 mg / l as measured by the first densitometer 157 and was set to be quantitatively transferred to 5 m3 / hr by the pumping action of the second pump 122. Assume In the case where the dehydrator 115 dewaters the sludge injected at a concentration of about 50 kg · ds / hr [2.5 m 3 / hr] at a concentration of 20,000 mg / l of sludge, the flocculant and the sludge are flocculated and mixed in the flocculation mixing tank 113. Water is separated from the sludge is discharged at a flow rate of 2.5㎥ / hr through the sludge concentrator 160. At this time, the concentration of the discharged water is 200 to 300 mg / ℓ, which is negligible compared to the concentration of the sludge introduced into the flocculation mixing tank 113 is smaller than the original concentration, so if ignored in the calculation, the concentration added to the dehydrator 115 As a result, sludge having a concentration of 20,000 mg / l may be supplied to the dehydrator.

In addition, since the sludge introduced into the cohesion mixing tank 113 generally uses a metering pump, the input amount is constant. At this time, it is assumed that the flow rate is constant at 5 mm and the concentration is changed, and if the changed concentration is changed to 15,000 mg / L as a result of the measurement of the first densitometer 157, the concentration of sludge introduced into the dehydrator 115 is introduced. In order to remove the water at a sludge concentrator 160 to remove the water at a flow rate of 1.25 m 3 / hr, the sludge added to the dehydrator 115 is 50 kg.ds / hr [2.5] at 20,000 mg / l. M 3 / hr]. In this way, the concentration introduced into the dehydrator 115 may be adjusted as desired by simply adjusting the water removal amount in the sludge concentrator 160. In addition, the same result can be obtained by adjusting the pumping operation of the second pump 122 which transfers the sludge to the coagulation mixing tank 113 while keeping the amount of water to be excluded constant.

Generally, flocculant drug selection and dosage are determined by agglutination reaction test of sludge, that is, JAR test. The flocculated flocculant is not in the form of dark dense and desorbent after coagulation and mixing of the supplied sludge and flocculant. The flocculation state is the best with the least amount of flocculant. In other words, dehydration is possible at the lowest water content, and the concentration of water excluded at this time is low. In addition, when the viscosity at this time is measured and the advantage is taken as a reference point, this reference point is the viscosity of a state in which the most appropriate amount of flocculant is added.

This reference point is determined by JAR test. Generally, the SS concentration of water, which is excluded by applying a relatively suitable coagulant to the sludge, is excluded by a gap of about mm, so that the flocculated floc is hardly passed, so that the sludge concentration is high and low. Irrespective of 200mg / l to 300mg / l, the concentration of water to be excluded is drastically increased when less than the proper amount is added.

Therefore, in the preferred embodiment of the present invention, the sludge and the coagulant introduced into the flocculation mixing tank 113, the coagulation and agitation mixing, and the concentration reference point of the water discharged from the sludge concentrator 160 from the sludge to the water separated from the flocculation mixed sludge In this case, the concentration of the flocculant is adjusted by operating the densitometer and the coagulant pump according to the feedback data so that the SS concentration of the excluded water is measured by the second densitometer 175 to approach the SS concentration reference point of the excluded water. When the SS concentration of water is high, less coagulant is added as compared to the sludge concentration flowing into the coagulation mixing tank 113. When the amount of coagulant added to the coagulation mixing tank 113 is increased, the concentration of water excluded is a reference point. Since it moves close to, move the medicine based on the SS concentration reference point. In addition, if the sludge is introduced into the flocculation mixing tank 113 in a state in which the state of the flocculation agent is changed so that the amount of flocculant is at least introduced, the flocculant which is not necessary for the flocculation reaction is mixed with water, since the flocculant is not excessively added. Comes out. At this time, when measuring with a viscometer, it moves in a high direction from the proposed reference point, so it receives this signal and measures the SS concentration of the excluded water while adding less coagulant. Automated medical device can be automated.

Although the technical details of the sludge concentrating apparatus of the present invention and the sludge treatment system having the same have been described together with the accompanying drawings, this is illustrative of the best embodiment of the present invention and is not intended to limit the present invention. In addition, it is obvious that any person skilled in the art can make various modifications and imitations within the scope of the appended claims without departing from the scope of the technical idea of the present invention.

11,51,111: sedimentation basin 12,53,112: sludge storage tank
13,55,113: flocculation mixing tank 14,54,114: flocculant dissolution tank
15,56,115: Dehydrator
21,22,23,61,62,63,64,121,122,123: Pump
31,32,33,34,71,72,73,75,76,131,132,134,135: transfer pipe
52: Centrifugal Thickener
57,157,175: Densitometer 136: Drain
158,176 Flowmeter
160,260,360,460,560: Sludge Concentrator
161,261,361,461,561: outer casing
162a, 262a, 362a, 462a, 562a: floc discharge pipe
162b, 262b, 362b, 462b, 562b
163,263,363,463,563: sludge inlet pipe
164,264,364,464,564: flocculant inlet pipe
166,266,366,466,566: Drive motor
167f, 267f, 367f, 467f, 567f: spacer
168,268: stirrer 169, 269: rotating bar
180,280,380,480,580: Cylindrical Structure
181,281: top plate
182,282,382,482,582: lower support structure
365a, 465a, 565a: Wings 370,470,570: Fastening rod
381,481,581: Upper support structure
S1, S2: space G: gap
165,265,365,465,565: Spindle
167a, 267a, 367a, 467a, 567a: fixed disc
167b, 267b, 367b, 467b, 567b: Movable Disc
167c, 267c: Fastening protrusion 167d, 267d: Pin insertion hole
267e, 367e, 467e, 567e: protrusion
167g, 267g: Fastening Pin
167h, 267h, 367h, 467h, 567h: tightening nut
168a, 169a, 268a, 269a, 469a, 569a: vertical rod
168b, 169b, 268b, 269b, 469b, 569b: Horizontal Rod

Claims (1)

In the sludge concentrator which induces stirring mixing of sludge and flocculant,
An outer casing having an inner space;
Cylindrical structure installed in the inner space of the outer casing, a plurality of ring-shaped fixed disks and movable disks are alternately repeatedly stacked so as to have a gap therebetween, and the plurality of fixed disks are formed by fixedly coupled to each other integrally. and;
One or more inlet pipes connected to a lower portion of the outer casing to allow sludge or flocculant to enter the first space between the outer casing and the cylindrical structure;
A paddle type stirrer for inducing agitation of sludge and flocculant while rotating in the first space;
A floc discharge pipe connected to an upper side of the outer casing to discharge the floc formed by agitation of the sludge and the flocculant;
A desorption liquid discharge tube communicating with a second space formed inside the cylindrical structure and discharging the desorption liquid generated by agitation of the sludge and the coagulant introduced into the second space through the gap of the cylindrical structure; And
And a rotation bar connected to a main shaft for rotating the stirrer so as to be interviewed on the radially outer surface of the cylindrical structure,
The rotation bar is composed of a vertical rod extending in a direction parallel to the main axis to be interviewed on the radial outer surface of the cylindrical structure, and a horizontal rod which is horizontally extended at the top and bottom of the vertical rod, respectively, fixed to the main shaft,
The outer diameter of the movable disk is larger than the outer diameter of the fixed disk, the rotary diameter of the rotary bar is formed with the same as the outer diameter of the fixed disk sludge thickening apparatus.

Images