KR102383749B1 - screw scum skimmer and water treatment facility having the same - Google Patents

Abstract

The present invention relates to a screw skimmer and a sludge removal facility having the same, which minimize the blind spot which cannot remove scum generated in the sedimentation basin of a sewage or wastewater treatment system, solves the problem of deterioration of treated water due to accumulated scum, the occurrence of odor, and the occurrence of pests, improve the scum treatment efficiency of the sewage and wastewater treatment system. Accordingly, it is possible to increase the efficiency of sludge removal and scum removal by improving the operating efficiency of the screw skimmer and the economic efficiency. The screw skimmer is a device for treating scum in a settling tank, and comprises: a driving unit comprising a motor as a driving source; a screw skimmer installed to be rotatable by receiving the driving force of the motor and pressurizing and transferring the scum to one side of a skimmer shaft in an axial direction; a trough unit installed between the settling tank and the screw skimmer so that the scum transported to one side in the axial direction by the screw skimmer can be discharged to the outside of the sedimentation basin.

Description

Screw skimmer and sludge removal facility having the same

The present invention relates to a screw skimmer and a sludge removal facility having the same, and more particularly, to a blind spot where the scum removal action does not reach in removing scum generated in a sedimentation pond of a sewage or wastewater treatment system. It relates to a technology that can eliminate the scum and improve the scum removal efficiency.

In general, various organic and inorganic substances are present in raw water introduced into water treatment plants such as sewage treatment plants and wastewater treatment plants, and are introduced into the treatment plants together with various suspended substances.

Looking at the general sewage treatment process, sand and suspended substances contained in the inflow sewage are removed from the inflow duct, then settling and separated by gravity sedimentation in the primary sedimentation tank, and then passed through a bioreactor that decomposes organic matter by microorganisms. The supernatant water that has passed through the bioreactor is re-sedimented in the secondary sedimentation tank to remove suspended matter. Then, the supernatant again goes through the final total phosphorus facility and goes through a treatment process that makes it even clearer, and finally goes through a process of sterilizing and discharging. For each process, the sludge is transferred by a sludge drawing pump.

Among these treatment processes, a sludge collector to remove the settled sludge and a scum skimmer for removing scum are installed in the first settling tank, which is the primary settling tank, and the final settling tank, which is the second settling tank.

The sludge collector removes the sludge sunk by gravity settling at the lower part of the settling basin and transfers it to the hopper, and the scum skimmer removes the suspended matter, scum, and oil component floating to the surface layer of the raw water at the upper part.

In the secondary sedimentation tank, a lot of scum is generated in the decomposition process together with microorganisms in the bioreactor.

In particular, as the sewage treatment plant is converted to an advanced treatment process to remove nitrogen and phosphorus from the new town development and treatment plant, the sewage pipeline is improved from the previous merging type to the fractionation type, so it is changed to a process in which excrement is introduced together, thereby pre-treatment As the inflow of raw sludge by manure as well as scum generated in the process increases, the generation of suspended solids in sedimentation ponds increases.

For the type of scum skimmer, pipe type skimmer and helical skimmer are used the most, and both types of scum skimmer mentioned above are installed according to the inflow direction of the raw water to remove the flow of raw water and the scum transferred by the sludge collector. The scum skimmer is installed in the vicinity of the front of the trough, which is the scum discharge path, across the raw water flow direction (refer to the arrow in FIG. 2), and the collected scum is conveyed to the outside through the trough.

However, scum is generated over the entire area of the settling tank, and in particular, the sludge not removed by the sludge collector rots and floats, which is called a swelling phenomenon or bulking.

This expanded or bulked scum also occurs not only in the front of the trough in the sedimentation basin, but also in the area behind the trough.

In the past, there was a problem in that the removal of the scum in the rear area based on the trough could not be completely done because the skimmer for removing the scum was installed only in the front of the trough.

Therefore, in the trough rear area of the sedimentation basin, the sludge mass of scum or suspended matter and oil cannot be removed and it continues to accumulate, and as the surface moisture is removed, it continues to float above the water surface, and the phenomenon that the scum continues to grow in the water occurs. If it is not removed for a long period of time, there is a problem in that it becomes difficult to remove when it hardens.

In particular, bigger and more important problems caused by this situation include deterioration of treated water, generation of odors, and generation of pests.

Patent Document 1: Korean Utility Model Publication 20-0387151 (2005.06.08.) Patent Document 2: Korean Patent Publication No. 10-0714384 (2007.04.26.) Patent Document 3: Korean Patent Publication No. 10-2015-0129481 (2015.11.20.) Patent Document 4: Korean Utility Model Publication No. 20-0437707 (2007.12.13.)

The present invention is to solve the above-mentioned problems, so that the scum generated in the sedimentation pond of the sewage or wastewater treatment system can be removed without covering the front and rear areas with respect to the scum trough, An object of the present invention is to provide a screw skimmer capable of preventing in advance a phenomenon in which scum accumulates and hardens over a long period of time at the rear of the trough and causes difficulties in removal, and a sludge removal facility having the same.

That is, the present invention minimizes the blind spot that cannot remove the scum generated in the settling pond of the sewage or wastewater treatment system, thereby solving the problem of deterioration of treated water due to the scum accumulated in the blind spot, the generation of odor and the occurrence of pests. The purpose of the present invention is to improve the scum treatment efficiency of sewage and wastewater treatment systems.

Another object of the present invention is to improve the operating efficiency of the screw skimmer for scum removal, and to increase the economic efficiency of the sludge removal facility by improving the operating efficiency of the screw skimmer.

In order to achieve the above object, the present invention provides an apparatus for processing scum in a settling basin, comprising: a driving unit including a motor as a driving source; a screw skimmer that is rotatably installed to receive the driving force of the motor and pressurizes and transfers the scum to one side in the axial direction of the skimmer shaft; A screw skimmer comprising a trough unit installed between the settling basin and the screw skimmer so as to discharge the scum transferred to one side in the axial direction by the screw skimmer to the outside of the settling basin is provided.

At this time, the driving unit includes a driving sprocket that rotates by receiving a driving force through the rotation shaft of the motor, and a driven sprocket coupled to one end of the screw skimmer so that the screw skimmer rotates in conjunction with each other when the driving sprocket rotates, and the driving It includes a sprocket and a chain wound around the driven sprocket.

And, the driving unit may further include a tension control sprocket installed to adjust the tension of the chain on the winding path of the chain.

On the other hand, according to the present invention, the screw skimmer is characterized in that it is configured to include a skimmer shaft rotating by receiving the driving force of the motor, and a spiral blade formed along the axial direction on the outer peripheral surface of the skimmer shaft.

And, the spiral blade is a conical spiral blade defined as a line extending in a radial direction from a point in contact with the outer circumferential surface of the skimmer shaft is inclined in the scum forward direction with respect to a surface orthogonal to the axial direction of the skimmer shaft. characterized by being.

In addition, the skimmer shaft is preferably a shaft of a hollow hollow structure.

In addition, the pitch of the spiral blade is 2 to 3 times the diameter of the skimmer shaft at the blade starting position close to the motor, and the pitch is preferably formed to be gradually smaller toward the trough.

And, the blade entry portion at the blade starting position close to the motor of the spiral blade, between the line connecting the entry portion and a line orthogonal to the axis of the skimmer shaft so that the scum can stably come into the spiral blade rotation radius. It is preferable that the angle (θ) is formed to be larger than that of other parts of the spiral blade other than the entry part.

Meanwhile, according to the present invention, the trough unit includes a trough that forms a sink groove into which the scum transferred to the trough unit by the screw skimmer is introduced for discharging, and the trough for discharging the scum. A pair of trough gates that are hinged to the side and perform an action to allow or block scum into the trough depending on the direction of rotation, and a trough gate to selectively allow inflow and blockage of scum to and from the trough for discharging scum It is characterized in that it is configured to include an opening and closing means.

The trough unit includes a stuffing housing installed on one side of the trough to support the skimmer shaft, an oilless bearing installed inside the stuffing housing so as to be in contact with an outer circumferential surface of the skimmer shaft, and the skimmer shaft inside the stuffing housing. It further includes a leakage preventing member such as an oil seal or gland packing installed to be in contact with the .

This is installed because the airtightness of the skimmer shaft and the stuffing housing is important, and the structure for such airtightness is applicable to all places requiring airtightness in sludge and scum removal facilities such as troughs and sedimentation basin walls.

Meanwhile, according to the present invention, the trough gate opening/closing means includes a stem mount that is fixedly provided above the scum outlet of the trough, and is rotatably installed with the support of a shaft support member on the stem mount, and the shaft support member A stem shaft having a lead screw formed in the lower region, a nut block that is linearly moved up and down along the axial direction on the lead screw according to the rotation direction of the stem shaft, and one end is hinged to the nut block and the other end is the It includes a pair of left and right connection links hinged to the trough gate.

That is, each trough gate is hinge-coupled to the lower end of the connection link to a hinge coupling unit provided on one side of its upper end, and is hinged to both sides of the upper end of the trough by hinge members provided on both sides of its lower end.

On the other hand, each of the pair of trough gates is bent such that an upper end thereof faces toward the center of the sink groove of the trough.

And, the pair of connecting links are installed in a symmetrical structure, and each of the connecting links is curved to be advantageous in transmitting force.

Meanwhile, according to the present invention, a manual operation handle for manual operation or a gate driving motor for automatic operation may be connected to the upper end of the stem shaft.

When the drive motor for the gate for automatic operation is connected, an encoder that detects the open/closed state of the trough gate is connected by detecting the shaft rotation speed of the motor shaft or stem shaft.

And, according to the present invention, an open/close detection means for detecting the open/closed state of the trough gate through sensing the position of the nut block moving linearly on the stem shaft may be further provided.

In this case, the opening/closing detection means includes a close limit switch for detecting the closed position of the trough gate, and an open limit switch for detecting the open position of the trough gate.

Meanwhile, according to the present invention, the trough unit may further include a guide means for more effectively guiding the scum conveyed by the screw skimmer to the trough without being disturbed.

At this time, the guide means includes a guide plate on both sides of the trough for guiding the scum conveyed by the screw skimmer to the trough, and the guide plate is formed in a structure in which a partial area on the inlet side becomes wider toward the end, and the The guide plate is preferably installed to cover and surround an area of at least one pitch adjacent to the trough side of the spiral blade.

On the other hand, according to another aspect of the present invention for achieving the above object, a settling tank into which raw water is introduced; a sludge collector provided to scrape sludge from the bottom of the settling tank and discharge it to the outside of the settling tank; A screw skimmer according to any one of claims 1 to 19 provided in each settling tank to send the scum pushed by the action of the flight constituting the sludge collector from the water surface of the settling tank to the trough to discharge to the outside of the settling tank. It is characterized in that a sludge removal facility is provided.

On the other hand, according to another aspect of the present invention for achieving the above object, the raw water is introduced, respectively, and at least two settling basins are continuously arranged; a sludge collector provided in each settling tank to scrape sludge from the bottom of each settling tank and discharge to the outside of the settling tank; A screw skimmer according to any one of claims 1 to 19 provided in each settling tank to send the scum pushed by the action of the flight constituting the sludge collector to the trough at the water surface of each settling tank to discharge to the outside of the settling tank, but , the scum discharged through the trough from the settling basin arranged at the front among the two settling basins arranged consecutively is transferred to the trough of the rear sedimentation basin through the skimmer shaft, which is the hollow structure of the screw skimmer provided in the settling basin arranged at the rear. It is characterized in that a sludge removal facility is provided.

The screw skimmer according to the present invention having the above configuration and a sludge removal facility having the same provide the following effects.

First, the screw skimmer of the present invention is configured to be able to remove scum generated in the sedimentation pond of the sewage or wastewater treatment system without covering the front and rear areas based on the trough of the sedimentation pond, Otherwise, it is possible to prevent the scum from accumulating and hardening over a long period of time in the region behind the trough in advance.

That is, the present invention provides the effect of minimizing the blind spot that the scum skimmer cannot reach in removing scum from the settling pond of the sewage or wastewater treatment system, and thus the treated water generated due to the accumulation of scum in the existing blind spot It is possible to prevent the deterioration of scum and the occurrence of odors and pests in advance, so that it is possible to improve the efficiency in the scum treatment.

In addition, the present invention can improve the operating efficiency of the screw skimmer for removing scum, and increase the economic efficiency of the sludge removal facility by improving the operating efficiency of the screw skimmer.

On the other hand, in the present invention, in constructing a plurality of continuously arranged sedimentation tanks, by adopting a method of sending the scum of the previously placed settling tank to the trough of the subsequently disposed settling tank through the internal pipe of the skimmer shaft installed in the subsequently disposed settling tank, The structure of the sludge removal facility can be efficiently designed, the number of parts of the screw skimmer device can be reduced, and the operating efficiency can be improved, which in turn can increase the economic feasibility of the sludge removal facility.

1 is a partially cut-away perspective view showing a sludge removal facility to which a screw skimmer according to the present invention is applied;
Fig. 2 is a schematic cross-sectional view of Fig. 1;
3 is an enlarged perspective view of area 'A' of FIG. 1;
Figure 4 is a side view of Figure 3
5 is a cross-sectional perspective view of the main part taken along line I-I of FIG. 4, a reference perspective view for showing the internal structure of the screw skimmer;
6 is an enlarged view of area 'B' of FIG. 5
7 is a perspective view of FIG. 3 viewed from another direction;
8 and 9 are perspective views of main parts for explaining the operation of the trough gate of the screw skimmer according to the present invention,
8 is a perspective view of a main part showing a closed state of the trough gate;
9 is a perspective view of a main part showing an open state of the trough gate;
10 and 11 are front views of the trough gate taken along line II-II of FIG. 8 and line III-III of FIG. 9, respectively;
12 is an enlarged view of the upper end of the trough gate opening/closing means of FIG. 7, showing the driving motor part of the trough gate opening/closing means when configured in an automatic operation method;
13 is an enlarged view of the lower end of the trough gate opening/closing means of FIG. 7, showing the gate opening/closing detecting means configured at the lower end of the trough gate opening/closing means when configured in an automatic operation method;
14 is a view showing an operation handle when the trough gate opening and closing means of FIG. 7 is configured in a manual operation method;
15 is a partially cut-away perspective view illustrating a state in which the screw skimmer of the present invention is applied when a plurality of settling ponds are continuously disposed.

Other objects, characteristics and advantages of the present invention will become apparent from a detailed description of the embodiments with reference to the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only this embodiment allows the disclosure of the present invention to be complete and the scope of the invention to those of ordinary skill in the art. It is provided for complete information. Accordingly, the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical spirit of the present invention, so they can be substituted at the time of filing of the present invention. It should be understood that various equivalents and modifications may exist.

Hereinafter, each embodiment of the present invention will be described with reference to the accompanying drawings 1 to 15.

[Example 1]

First, a first embodiment of the present invention will be described with reference to FIGS. 1 to 13 .

1 and 2 are a partially cut-away perspective view and a cross-sectional schematic view showing a sludge removal facility to which a screw skimmer according to the present invention is applied.

3 is an enlarged perspective view of area 'A' of FIG. 1, FIG. 4 is a side view of FIG. 3, and FIG. 5 is a cross-sectional perspective view taken along line I-I of FIG. 4 Reference for showing the internal structure of the screw skimmer is a perspective view.

6 is an enlarged view of area 'B' of FIG. 5 , and FIG. 7 is a perspective view of FIG. 3 viewed from another direction.

8 and 9 are main perspective views for explaining the operation of the trough gate of the screw skimmer according to the present invention. is a perspective view.

10 and 11 are front views of the trough gate as viewed along line II-II of FIG. 8 and line III-III of FIG. 9, respectively.

12 is a view showing a driving motor part of the trough gate opening and closing means when configured in an automatic operation method, and FIG. 13 is a gate opening/closing detection means configured at the lower end of the trough gate opening and closing means when configured in an automatic operation method. It is a drawing.

1 to 13 of these drawings, the present invention is a device for treating scum of raw water that is provided in the settling tank 1 and introduced into the settling tank 1, and a driving unit including a motor 300 as a driving source ( 3) and a screw skimmer 2 that is rotatably installed to receive the driving force of the motor 300 and pressurizes and transfers the scum to one side in the axial direction of the skimmer shaft 200, and the screw skimmer 2 It is configured to include a trough unit (4) installed between the settling basin (1) and the screw skimmer (2) so that the scum transferred to one side of the direction can be discharged to the outside of the settling basin (1).

Here, the driving unit 3 includes a driving sprocket 310 that rotates by receiving a driving force through a rotation shaft of a motor 300 fixed to a motor mount installed on the wall of the settling basin 1 , and the driving sprocket 310 . A driven sprocket 330 coupled to one end of the screw skimmer 2 so that the screw skimmer 2 rotates in conjunction with each other when rotating, and a chain 350 wound around the driving sprocket 310 and the driven sprocket 330 ) is included.

In addition, the driving unit 3 includes a sprocket 370 for adjusting tension installed on the winding path of the chain 350 to adjust the tension of the chain, and the sprocket 370 for adjusting the tension is the chain 350 . ), while the fixed position is variably installed, the tension applied to the chain 350 is changed as the fixed position is adjusted.

For example, when the arrangement position of the sprocket 370 for adjusting the tension is changed to a relatively lower position, the tension applied to the chain 350 may be increased.

On the other hand, the screw skimmer 2 of the present invention includes a skimmer shaft 200 that rotates by receiving the driving force of the motor 300 , and a spiral blade 210 formed on the outer peripheral surface of the skimmer shaft 200 along the axial direction. ) is included.

Here, the skimmer shaft 200 may form a hollow hollow structure, and the spiral blade 210 has a line extending in the radial direction from an arbitrary point in contact with the outer circumferential surface of the skimmer shaft 200 is the skimmer shaft ( 200) is a conical spiral blade 210 defined as inclined in the forward direction of the scum with respect to a plane perpendicular to the axial direction.

On the other hand, the pitch of the spiral blade 210 is 2 to 3 times the diameter of the skimmer shaft 200 at the blade starting position close to the motor 300, and is formed to become narrower toward the trough 400. This is preferred, but is not necessarily limited thereto.

In addition, the blade entry portion provided at the blade start position close to the motor 300 of the spiral blade 210, so that the scum can stably come into the spiral blade 210 rotation radius, compared to other parts of the blade skimmer shaft It is preferable that the angle θ between the line perpendicular to the axis of (200) is formed to be larger.

That is, it is preferable that the entry part lies parallel to the axis line so that the angle between the line connecting the blade entry part, which is the starting position of the spiral blade 210, and the axis line of the skimmer shaft 200 is a small angle, and accordingly, the scum enters the blade It can be induced to enter within the rotation radius of the spiral blade 210 in a state in which shaking is minimized through the part.

And, the trough unit 4 of the present invention is hinged to the upper portion of the trough 400 for discharging scum to perform a scum inflow permitting action or scum blocking action into the trough 400 according to the rotational direction. of the trough gate 410, and a trough gate opening/closing means for selectively allowing scum inflow and blocking into the trough 400 for scum discharge.

More specifically, the trough unit 4 is a trough 400 which is a trough forming a sink groove into which the scum transferred to the trough unit 4 by the screw skimmer 2 is introduced for discharge. And, a stuffing housing 430 installed to support the skimmer shaft 200 on one side of the trough 400, and an oilless bearing installed inside the stuffing housing 430 so as to be in contact with the outer circumferential surface of the skimmer shaft 200 and a leakage preventing member 432 such as an oil seal or gland packing installed inside the stuffing housing 430 to contact the skimmer shaft 200 with 431 .

On the other hand, the trough gate opening/closing means constituting the trough unit 4 includes a stem mount 450 fixedly provided above the scum outlet of the trough 400, and a support bearing on the stem mount 450, such as A stem shaft 452 that is rotatably installed with the support of the shaft support member 451 and a lead screw 452a is formed in the lower region of the shaft support member 451, and in the rotation direction of the stem shaft 452 Accordingly, a nut block 453 that is linearly moved up and down along the axial direction on the lead screw 452a, one end is hinged on the nut block 453 and the other end is hinged to the trough gate 410 It includes a pair of left and right connection links 454 .

That is, each trough gate 410 is hinge-coupled to the lower end of the connection link 454 to the hinge coupling portion 410a provided on one side of the upper end portion thereof, and the trough by the hinge member 410b provided on both sides of the lower end portion thereof. 400) is hinged on both sides of the upper end.

Accordingly, the trough gate 410 rotates inwardly around the hinge part by the pressing action of the connection link 454 when the nut block 453 moves downward so that the scum can flow into the sink groove of the trough 400 . is in an open state, and when the nut block 453 moves upward, it rotates outward by the pulling action of the connection link 454 to become a closed state blocking the inflow of scum into the sink groove of the trough 400 .

On the other hand, each of the pair of trough gates 410 is bent in a substantially curved shape such that the upper end thereof faces the sink groove center direction of the trough 400 , which has the effect of lowering the trough gate 410 when the trough gate 410 is opened. In addition to promoting the scum, it acts to smoothly pass to the trough gate 410 on the bent portion.

On the other hand, the pair of connecting links 454 are installed in a left-right symmetrical structure, and each of the connecting links 454 is curved so as to be advantageous in transmitting a force for opening and closing the trough gate 410 .

More specifically, each of the pair of connecting links 454 has a concave outer shape while descending from the hinged portion of the nut block 453 to the hinged portion 410a of the trough gate 410 .

On the other hand, a gate driving motor 620 (eg, a geared motor) for automatic operation is connected to the upper end of the stem shaft 452 , and the shaft rotation speed of the stem shaft 452 is connected to one side of the gate driving motor 620 . An encoder 621 is provided for detection, and accordingly, the opening and closing of the trough gate 410 can be accurately performed through the control of the driving motor.

In addition, unlike in the present embodiment, the encoder 621 may be configured to directly detect the axial rotation speed of the motor shaft of the gate driving motor 620 .

In addition, an open/close detection means for detecting the open/closed state of the trough gate 410 through sensing the position of the nut block 453 moving linearly on the stem shaft 452 may be further provided.

Here, the open/close detection means includes a close limit switch 710 for detecting the closed position of the trough gate 410 through the position of the nut block 453 and the trough gate 410 through the position of the nut block 453 It is configured to include an open limit switch 720 for detecting the open position of the.

In addition, a mount bracket 730 for installing the lock detection means may be provided, and the mount bracket 730 may be installed to be coupled to the stem mount 450 .

On the other hand, it is preferable that the trough unit 4 further includes a guide plate 420 on the left and right sides of the trough 400 for guiding the scum conveyed by the screw skimmer 2 to the trough 400 .

Here, the guide plate 420 is formed to have a structure in which a portion of the entrance-side area becomes wider toward the end, and the guide plate 420 surrounds a predetermined area adjacent to the trough 400 of the spiral blade 210 . It is preferable to install

Specifically, the guide plate 420 is preferably installed to surround the area of at least one pitch or more of the spiral blade 210 adjacent to the trough 400 .

In addition, a reinforcing plate 421 for increasing rigidity may be provided on a side surface of the guide plate 420 .

On the other hand, it is preferable that the axis of the skimmer shaft 200 of the screw skimmer 2 and the line passing through the center of the outlet 150 of the wall of the settling basin 1 coincide with each other, and the line passing through the center of the cross-section of the trough 400 is these It is preferable to be configured to coincide with the two lines (ie, the axis of the skimmer shaft 200 and the line passing through the center of the outlet 150 of the wall of the settling basin 1).

In FIGS. 1 and 2 , unexplained reference numeral 120 denotes a supernatant water discharge conduit provided so that the supernatant water after passing through the screw skimmer 2 installation area is discharged to the outside of the settling tank 1 .

The operation of the screw skimmer 2 according to the first embodiment of the present invention configured as described above is as follows.

First, referring to FIGS. 1 to 3 and 7 , the settling tank 1 generally has a sludge collector 5 that collects sludge laid on the floor and discharges it to a hopper 110 for sludge discharge. A screw skimmer 2 is provided that removes floating matter such as scum and vinyl and discharges it through the trough 400 .

Here, the sludge collector 5 includes a collector drive motor 51 and a head shaft 52 (Head Shaft) installed to rotate by receiving a driving force when the collector drive motor 51 is driven, and the head shaft ( An idle shaft (53, Idle Shaft), a take-up shaft (54, Take-up Shaft) and a corner shaft (55, Corner Shaft) which are sequentially installed rotatably in conjunction with the rotation of 52, and the head shaft 52 ), a main chain (56, Main Chain) wound around the idle shaft 53, the tape-up shaft 54, and the corner shaft 55 to transmit rotational force to the corner shaft 55, and the main chain ( It is configured to include a plurality of flights (57, Flight) arranged along the longitudinal direction on the 56).

Looking at the action process of the sludge collector 5, the driving force of the collector driving motor 51 is applied to the head shaft 52 through the chain 58 for driving the head shaft wound on the sprocket coupled to the shaft of the head shaft 52. When transmitted and rotated, the main chain 56 wound around the head shaft 52, the idle shaft 53, the take-up shaft 54, and the corner shaft 55 rotates these shafts and follows a predetermined trajectory. Followed by one week (一周).

That is, when the main chain 56 is driven, the plurality of flights 57 have an upper movement path in the upper part of the chain and a lower movement path in the lower part of the chain.

In this way, when the main chain 56 is driven, the flights 57 installed at regular intervals on the main chain 56 rake sludge from the bottom of the settling basin 1 and push the scum and floats toward the scum skimmer at the water surface. will do

At this time, the sludge collected by the flight 57 from the bottom of the settling basin 1 falls into the hopper 110 and is discharged, and the scum and the float pushed from the water surface to the side where the screw skimmer 2 is installed by the flight 57 are the skimmer shaft By the conveying action of the spiral blade 210 according to the rotation of 200, it is sent to the trough 400 provided at the end of the conveying direction.

When operating in this way, referring to FIG. 4 , the screw skimmer 2 of the present invention has a blade entry part from which the spiral blade 210 starts more parallel to the axis than other parts of the spiral blade 210 . By forming to lie close, it is possible to stably guide the injured scum to initially come into the rotation radius of the spiral blade 210 through the blade entry.

That is, the entry part of the spiral blade 210 is formed to have a larger angle (θ) with respect to a line orthogonal to the axis of the skimmer shaft 200 compared to other parts of the blade, so that the scum in the floating state is a spiral It can be stably guided into the radius of rotation through the entry part of the blade 210 .

On the other hand, the scum stably introduced into the rotation radius of the spiral blade 210 in this way moves toward the trough 400 by the conveying action of the spiral blade 210, the spiral blade 210 of the present invention prevents the outflow of sludge. In order to minimize it, it is possible to minimize the outflow of scum while the spiral blade 210 rotates by forming a cone shape with the inlet side widened toward the trough 400 .

In addition, according to the present invention, the pitch of the spiral blade 210 is 2 to 3 times the diameter of the skimmer shaft 200 at the blade starting position close to the motor 300, and as it is formed gradually narrower toward the trough, the skimmer It provides the effect of further compressing the scum along the axial direction of the shaft 200 .

And, the scum moving toward the trough 400 by the conveying action of the spiral blade 210 needs to be gathered so as to be easily put into the trough 400 side. According to the present invention, the trough 400 has inlets on both left and right sides. Since the widely spaced guide plate 420 is installed, the scum conveyed by the action of the spiral blade 210 can be gathered toward the trough without being disturbed by the guide action of the guide plate 420 .

That is, the guide plate 420 of the present invention is formed to have a structure in which a portion of the inlet side becomes wider toward the end, and the guide plate 420 surrounds a certain area adjacent to the trough side of the spiral blade 210 . In particular, the guide plate 420 is preferably installed to surround the area of at least one pitch or more of the spiral blade 210 adjacent to the trough side.

On the other hand, referring to FIGS. 8 to 11 , in accordance with the conveying action of the spiral blade 210 according to the rotation of the skimmer shaft 200 , the trough gate opening/closing means constituting the trough unit 4 is a trough gate 410 . It will perform the opening function.

For example, environmental basic facilities such as water purification plants and sewage treatment plants that operate 24 hours can be operated automatically at night. It can be discharged to the outside of the sedimentation tank.

When the trough gate 410 is opened by automatic operation, the gate driving motor 620 connected to the upper end of the stem shaft 452 is driven to rotate the stem shaft 452 in one direction, the stem shaft 452 The nut block 453 assembled in the lower region of the shaft support member 451 of the shaft moves downward along the lead screw 452a.

Accordingly, the trough gate 410 rotates inwardly around the hinge portion by the pressing action of the connection link 454 when the nut block 453 moves to the lower shaft of the nut block 453 so that the scum moves into the sink groove of the trough 400 . It becomes an open state that allows inflow.

The upper end of the trough gate 410 is bent toward the center of the sink groove of the trough 400, so that it is possible to achieve the effect of lowering the trough when it is opened, and also acts so that the scum rides on the bent portion and passes smoothly Accordingly, the scum easily flows into the sink groove of the trough 400 over the trough gate 410 along with the supernatant (refer to the arrow in FIG. 11 ).

And, the scum introduced into the sink groove of the trough 400 is discharged to the outside through the outlet 150 formed in the wall of the settling tank 1 together with the supernatant water.

On the other hand, when the trough gate 410 is closed by automatic operation, the gate driving motor 620 connected to the upper end of the stem shaft 452 is driven to rotate the stem shaft 452 in the opposite direction to the rotational direction when the stem shaft 452 is opened. Then, the nut block 453 assembled to the lower region of the shaft support member 451 of the stem shaft 452 moves upward in the axial direction along the lead screw 452a.

Accordingly, the trough gate 410 rotates to open outward around the hinge member 410b by a pulling action according to the rise of the connection link 454 connected to the nut block 453 moving upward in the axial direction. In this case, the trough gate acts like an embankment to achieve a closed state that blocks the scum from entering the sink groove of the trough 400 .

[Example 2]

14 is an enlarged view of the upper end when the trough gate driving unit 3 of FIG. 7 is configured in a manual operation method, and is a view showing a state in which the operation handle 610 for manual operation is applied.

Since the basic structure of the screw skimmer 2 according to this embodiment follows the first embodiment described above, the description of the same configuration and operation is omitted to avoid duplication of description, and mainly the features according to the present embodiment are omitted. Explain.

In this embodiment, instead of opening and closing the trough gate 410 constituting the trough gate opening/closing means for selectively making the inflow and blocking of scum into the trough 400 for scum discharge through the driving force of the motor, the operation handle 610 There is a difference in opening or closing through the operation of ).

That is, when the screw skimmer 2 is manually operated, the trough gate 410 is opened by holding the handle and turning the operation handle 610, the conveying action of the spiral blade 210 of the screw skimmer 2 And the scum collected in the vicinity of the trough 400 by the guiding action of the guide plate 420 flows into the sink groove of the trough 400 beyond the trough gate 410, the height of which is lowered at the upper end, and thus the settling basin communicating with the sink groove It may be discharged to the outside of the settling tank 1 through the outlet 150 of the wall.

On the other hand, when the trough gate 410 is closed by holding the handle and turning the operation handle 610, the scum conveying action of the screw skimmer 2 is stopped, and the trough gate 410 is returned to its original position. The scum does not cross the trough gate 410 .

Also in this embodiment, an open/close detection means for detecting the open/closed state of the trough gate 410 through sensing the position of the nut block 453 moving linearly on the stem shaft 452 may be further provided.

That is, even in this embodiment, as the nut block 453 reaches the predetermined closed position, the close limit switch 710 for detecting the closing of the trough gate 410 and the nut block 453 reach the predetermined open position. Accordingly, since the open limit switch 720 for detecting the opening of the trough gate 410 is provided, it is possible to detect and confirm whether the trough gate 410 is opened or closed according to the manipulation of the manipulation handle 610 .

[Example 3]

15 is a partially cut-away perspective view showing an example in which the screw skimmer of the present invention is applied when a plurality of sedimentation ponds are continuously disposed.

This embodiment is characterized in that the screw skimmer of the present invention is applied to at least two settling ponds 1a and 1b in which raw water is introduced, respectively, and arranged in series.

That is, according to this embodiment, at least two settling ponds (1a, 1b) which are continuously arranged into which raw water is introduced; A sludge collector provided in each settling tank to scrape sludge from the bottom of each settling tank (1a, 1b) and discharge to the outside of the settling tank; The scum pushed by the action of the flight constituting the sludge collector from the water surface of each settling tank 1a, 1b is sent to the trough 400 and discharged to the outside of the finally disposed settling tank 1b Including a screw skimmer (2) The scum discharged through the trough from the settling tank 1a disposed at the front among the two settling tanks 1a and 1b disposed in series is the hollow structure of the screw skimmer 2 provided in the settling tank 1b disposed at the rear. It is characterized in that the structure is transferred to the trough of the rear settling basin 1b through the internal pipe of the skimmer shaft 200 .

The screw skimmer 2 described in the first embodiment described above may be applied to each settling basin of this embodiment, and the driving unit 3 of the first embodiment described above may be applied to the driving of the screw skimmer 2 in each settling basin. Therefore, in order to avoid duplication of description, a description of the specific configuration and operation of the screw skimmer and the driving unit will be omitted.

The operation of the sludge removal facility according to the present embodiment of this configuration is as follows.

The scum discharged through the trough from the settling tank disposed at the front of the two settling tanks arranged in series is the trough of the rear settling tank through the internal pipe of the skimmer shaft 200, which is the hollow structure of the screw skimmer 2 provided in the settling tank disposed at the rear. After being transferred to the clarifier, it joins with the scum and supernatant that are introduced into the trough by the conveying action of the screw skimmer 2 in the rear sedimentation basin, and is discharged to the outside through the outlet 150 formed in the wall of the rear sedimentation basin.

That is, the scum collected to one side by the rotation of the skimmer shaft 200 and the spiral blade 210 that received power from the motor 300 of the driving unit 3 is the trough 400 in the open state of the trough gate 410. In general, since a plurality of sedimentation ponds are continuously connected in a water treatment facility, according to this embodiment, the skimmer shaft 200 of the screw skimmer 2 installed in other sedimentation ponds except for the settling pond disposed at the front has a hollow tube structure. Therefore, it also serves as a discharge water in the settling tank.

Therefore, the scum that has passed through the outlet 150 of the previously disposed settling tank among the continuously disposed settling tanks to the subsequently disposed settling tank area is the trough of the corresponding settling tank through the internal pipe of the skimmer shaft 200 installed in the subsequently disposed settling tank. (400).

Although the technical idea of the present invention described above has been specifically described in the preferred embodiment, it should be noted that the above-described embodiment is for the description and not the limitation.

In addition, it is a matter of course that various changes and modifications may be made to those of ordinary skill in the art within the scope of the technical spirit of the present invention. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

1, 1a, 1b: clarifier 110: hopper
120: supernatant water outlet
150: outlet 5: sludge collector
51: collector drive motor 52: head shaft
53: idle shaft 54: take-up shaft
55: corner shaft 56: main chain
57: flight 2: screw skimmer
200: skimmer shaft 210: spiral blade
3: drive unit 300: motor
310: drive sprocket 330: driven sprocket
350: chain 370: sprocket for tension control
4: trough unit 400: trough
410: trough gate 410a: hinge coupling portion
410b: hinge member 420: guide plate
421: reinforcement plate 430: stuffing housing
431: oilless bearing = bearing member 432: leakage preventing member
450: stem mount 451: shaft support member
452: stem shaft 452a: lead screw
453: nut block 454: connecting link
610: control handle 620: drive motor for gate
621: encoder 710: close limit switch
720: open limit switch 730: mount bracket

Claims (21)

An apparatus for treating scum in a settling basin, comprising:
a driving unit including a motor as a driving source;
a screw skimmer that is rotatably installed by receiving the driving force of the motor to transfer the scum to one side in the axial direction of the skimmer shaft; and
and a trough unit installed between the settling basin and the screw skimmer to discharge the scum transferred to one side in the axial direction by the screw skimmer to the outside of the settling basin,
The trough unit is
a trough which is a trough forming a sink groove into which the scum transferred to the trough unit by the screw skimmer is introduced for discharging;
A pair of trough gates that are hinged to the upper side of the trough for scum discharge and perform an action to allow or block scum into the trough depending on the direction of rotation;
A screw skimmer comprising a trough gate opening/closing means for selectively allowing scum to flow into and out of the trough for discharging scum. According to claim 1,
The drive unit is
A driving sprocket that rotates by receiving a driving force through the rotation shaft of the motor;
a driven sprocket coupled to one end of the screw skimmer so that the screw skimmer rotates in association with the rotation of the driving sprocket;
A screw skimmer comprising a chain wound around the driving sprocket and the driven sprocket. 3. The method of claim 2,
The drive unit is
The screw skimmer further comprising a tension control sprocket installed on the winding path of the chain to control the tension of the chain. According to claim 1,
The screw skimmer,
a skimmer shaft rotating by receiving the driving force of the motor;
It includes a spiral blade formed along the axial direction on the outer peripheral surface of the skimmer shaft,
The spiral blade is a conical spiral blade defined as a line extending in a radial direction from a point in contact with the outer circumferential surface of the skimmer shaft is inclined in the scum forward direction with respect to a surface orthogonal to the axial direction of the skimmer shaft. Features a screw skimmer. 5. The method of claim 4,
The skimmer shaft is a screw skimmer, characterized in that the shaft has a hollow hollow structure. 5. The method of claim 4,
The pitch of the spiral blades is 2 to 3 times the diameter of the skimmer shaft at the blade starting position close to the motor, and the screw skimmer, characterized in that it becomes gradually narrower toward the trough. 5. The method of claim 4,
The blade entry portion at the blade starting position close to the motor of the spiral blade has an angle between it and a line perpendicular to the axis of the skimmer shaft, compared to other portions of the blade, so that the scum can stably enter within the rotation radius of the spiral blade. Screw skimmer, characterized in that it is formed large. delete According to claim 1,
The trough unit is
a stuffing housing installed on one side of the trough to support the skimmer shaft;
an oilless bearing installed inside the stuffing housing so as to be in contact with the outer circumferential surface of the skimmer shaft;
The screw skimmer, characterized in that it comprises a leakage preventing member installed inside the stuffing housing in contact with the skimmer shaft. According to claim 1,
The trough gate opening and closing means,
A stem mount provided above the scum outlet of the trough;
a stem shaft which is rotatably installed on the stem mount with the support of the shaft support member and has a lead screw formed in the lower region of the shaft support member;
a nut block that is linearly moved up and down along the axial direction on the lead screw according to the rotation direction of the stem shaft;
A screw skimmer, characterized in that it includes a pair of left and right connecting links, one end of which is hinged to the nut block and the other end is hinged to the trough gate. According to claim 1,
Each of the pair of trough gates,
Screw skimmer, characterized in that the upper end is bent toward the center of the sink groove of the trough. 11. The method of claim 10,
The pair of connecting links are installed in a left-right symmetrical structure, and each of the connecting links is a screw skimmer that is formed in a curved shape concave on the outside so as to be advantageous for power transmission. 11. The method of claim 10,
At the upper end of the stem shaft,
The gate drive motor for automatic operation is connected, or
A screw skimmer, characterized in that it is configured to be connected to a manual operation handle for manual operation. 14. The method of claim 13,
Screw skimmer, characterized in that the encoder for detecting the open/close state of the trough gate through the shaft rotation detection of the drive motor for the gate for automatic operation is provided. 14. The method of claim 13,
The screw skimmer further comprising an opening/closing detection means for sensing the opening/closing state of the trough gate through the position sensing of the nut block moving linearly on the stem shaft. 16. The method of claim 15,
The open/close detection means,
a close limit switch for detecting the closed position of the trough gate;
Screw skimmer, characterized in that it comprises an open limit switch for detecting the open position of the trough gate. According to claim 1,
The trough unit is
A screw skimmer comprising guide means for guiding the scum conveyed by the screw skimmer to the trough. 18. The method of claim 17,
The guide means is a guide plate provided on both sides of the trough,
The guide plate is a screw skimmer, characterized in that it is formed in a structure in which a portion of the inlet side becomes wider toward the end. 19. The method of claim 18,
The guide plate is a screw skimmer, characterized in that it is installed to surround the area of at least one pitch or more of the spiral blade adjacent to the trough side. a settling tank into which raw water is introduced;
a sludge collector provided to scrape sludge from the bottom of the settling tank and discharge it to the outside of the settling tank;
According to any one of claims 1 to 7, 9 to 19, which is provided in each settling tank to send the scum pushed by the action of the flight constituting the sludge collector from the water surface of the settling tank to the trough to discharge to the outside of the settling tank Sludge removal equipment comprising a screw skimmer. At least two settling basins in which raw water is introduced and arranged continuously;
a sludge collector provided in each settling tank to scrape sludge from the bottom of each settling tank and discharge to the outside of the settling tank;
According to any one of claims 1 to 7, 9 to 19, which is provided in each settling tank to send the scum pushed by the action of the flight constituting the sludge collector to the trough at the water surface of each settling tank to discharge to the outside of the settling tank It consists of a screw skimmer,
The scum discharged through the trough from the settling basin arranged in the front among the two settling basins arranged continuously is transferred to the trough of the rear sedimentation basin through the skimmer shaft, which is the hollow structure of the screw skimmer provided in the sedimentation basin arranged at the rear. Sludge removal equipment characterized by.

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