JP6971164B2 - Scum gap and sludge treatment equipment - Google Patents

Description

The present invention relates to a scum gap and a sludge treatment apparatus.

As a background technique in this technical field, there is Japanese Patent Publication No. 6-7739 (Patent Document 1). In this publication, "Since the rotation angle of the scum skimmer is set to be operated in an appropriate combination so that it is in a shallow state and a deep state, the amount of outflow water is reduced and the pipe scum skimmer floats on the water surface near the pipe scum skimmer. It has the advantage of being able to recover the existing scum, attracting and collecting distant scum, and efficiently recovering even larger scum and a large amount of floating scum. "

Further, as a background technology in this technical field, there is Japanese Patent Publication No. 6-77738 (Patent Document 2). In this publication, "Since the link mechanism that tilts the pipe scum skimmer in the operation of the scum scraper and the clutch that can be manually operated are interposed between the pipe scum skimmer, it is suitable for the operation of the scum scraper. There is an advantage that the pipe scum skimmer can be tilted manually regardless of the situation. "

Gazette No. 6-77739 Gazette No. 6-77738

The scum skimmer of Patent Document 1 transmits the driving force of the main body chain of the sludge scraper installed in the sedimentation pond to the scum skimmer by a transmission device, and drives the scum skimmer for collecting and stopping the scum floating on the water surface. It is a device. In this method, a striker for tilting the scum skimmer forward is projected at a predetermined position of the main body chain of two articles, and the scum skimmer main body can be rotated in the circumferential direction via a link mechanism provided with a contact metal fitting that is tilted by the striker. The technique is intended to efficiently recover scum floating on the water surface by reducing the amount of discharged water by arbitrarily combining the rotation angles of scum gaps by combining a striker and a contact metal fitting.

However, in Patent Document 1, it is difficult to adjust the scum skimmer body so as to reduce the frequency of tilting operation.
Therefore, it is an object of the present invention to provide a scum skimmer and a sludge treatment apparatus capable of reducing the frequency of tilting the scum skimmer main body as compared with the conventional case.

In order to solve the above problems, the sprocket skimmer, which is one embodiment of the present invention, is a sludge scraper that circulates and drives a first chain installed in a settling pond and to which a plurality of flights are attached to scrape sludge from the bottom of the pond into a predetermined position. A sprocket skimmer driven by a sprocket, which is provided at the water surface position of the settling pond in a tiltable manner and has a tubular opening for taking in water, and a plurality of irregularities continuously on the peripheral portion. A first cam having a shape is formed, and one or a plurality of first overhanging members projecting from the first chain press the convex shape of the first cam, so that the first cam rotates by one convex shape. A wheel, a first transmission sprocket coaxially connected to the first cam wheel, a second transmission sprocket connected to the first transmission sprocket via a second chain, and coaxially on the second transmission sprocket. A second cam wheel which is connected to and has one or a plurality of second cams on the peripheral portion, and a second cam wheel which is provided at the bottom of the sprocket skimmer body and is pushed by the second cam to move the sprocket skimmer body around the axis. A second overhanging member that is tilted to take in the scum floating on the water surface of the settling pond from the opening and the scum skimmer main body are provided, and the engagement between the second cam and the second overhanging member is released. It is characterized by including a weight that sometimes directs the opening upward.
The sprocket skimmer, which is another embodiment of the present invention, is driven by a sludge scraper that circulates and drives a first chain installed in a settling pond and to which a plurality of flights are attached to scrape sludge from the bottom of the pond into a predetermined position. A sprocket sprocket body that is slantably provided at the water surface position of the sedimentation pond and has a tubular opening for taking in water, and a plurality of uneven first cams continuously on the peripheral portion. A first cam wheel formed and one or a plurality of first overhanging members protruding from the first chain rotate by one convex shape by pressing the convex shape of the first cam, respectively, and the first cam wheel. A first transmission sprocket coaxially connected to the cam wheel, a third transmission sprocket connected to the first transmission sprocket via a third chain, and a fourth transmission coaxially connected to the third transmission sprocket. A transmission sprocket, a second transmission sprocket connected to the fourth transmission sprocket via a fourth chain, and one or a plurality of transmission sprockets provided on the fourth chain in the length direction thereof. A third overhanging member provided with a sprocket, and a scum provided at the bottom of the scum sprocket body and pushed by the third overhanging member to tilt the scum skimmer body around an axis and float from the opening to the water surface of the sedimentation pond. It is provided with a second overhanging member for taking in water together, and a weight provided on the sprocket gap main body and with the opening facing upward when the engagement between the third overhanging member and the second overhanging member is disengaged. It is characterized by.

According to the present invention, it is possible to provide a scum skimmer and a sludge treatment apparatus capable of reducing the frequency of tilting the scum skimmer main body as compared with the conventional case.
Issues, configurations and effects other than those described above will be clarified by the following description of the embodiments.

It is a vertical sectional view of the settling basin provided with the sludge treatment apparatus which concerns on Example 1 of this invention. It is a side view of the scum skimmer which concerns on Example 1 of this invention. It is a front view of the peripheral part of the scum skimmer main body which concerns on Example 1 of this invention. It is a front view of the support shaft part of the sprocket wheel which transmits the driving force to the scum skimmer which concerns on Example 1 of this invention. It is a side view of the scum skimmer which concerns on Example 2 of this invention. FIG. 5 is a cross-sectional view taken along the line AA of FIG. 2 is a perspective view (a) and a front view (b) of a portion near the scum skimmer main body in a state where the striker and the arm of the scum skimmer according to the second embodiment of the present invention are not in contact with each other. Is. 2 is a perspective view (a) and a front view (b) of a portion near the scum skimmer main body in a state where the striker and the arm of the scum skimmer according to the second embodiment of the present invention are in contact with each other.

Hereinafter, examples of the present invention will be described with reference to the drawings. In the following description, the description of the front-back, up-down, left-right directions follows the instructions of the arrows indicating the directions of the devices shown in the drawings.

FIG. 1 is a vertical cross-sectional view of a settling basin P provided with the sludge treatment apparatus according to the first embodiment. This sludge treatment device includes a scum gap 1 and a sludge scraper 100. First, a sludge scraper 100 is provided in the settling basin P of the sewage treatment facility. The sludge scraper 100 is a 4-axis arrangement chain flight type, and includes a plurality of flights 103 attached to the chain 102 at predetermined intervals. Two chains 102 are provided in parallel (shown as one in FIG. 1), and chains 102 are attached to both sides of the flight 3 in the longitudinal direction. The flight 103 is provided on the entire circumference of the chain 102, but for convenience, only a part of the flight 103 is shown.

As shown in the figure, the left side of the settling basin P is the upstream side of the water flow, and the right side is the downstream side. A drive device 105 is installed above the water of the settling basin P. The sludge scraper 100 includes four sprocket wheels 104a, 104b, 104c, 104d. A chain 102 is stretched on each sprocket wheel 104a, 104b, 104c, 104d, and the chain 102 is circulated by the drive device 105 in the directions of arrows F1 and F2 from the water surface w side of the settling basin P to the pond bottom P2. Driven. Then, when the flight 103 moves along the pond bottom P2, the sludge accumulated on the pond bottom P2 due to gravity settling is attracted to the sludge pit P1 side.
An overflow trough 112 is provided at the position of the water surface w on the downstream side of the settling basin P. A scum gap 1 is provided at the position of the water surface w on the upstream side of the overflow trough 112.

By the way, the scum skimmer of Patent Document 1 transmits the driving force of the main body chain of the sludge scraper installed in the sedimentation pond to the scum skimmer by a transmission device to collect and stop the scum floating on the water surface. It is a drive device for scum gap. In this method, a striker for tilting the scum skimmer forward is projected at a predetermined position of the main body chain of two articles, and the scum skimmer main body can be rotated in the circumferential direction via a link mechanism provided with a contact metal fitting that is tilted by the striker. Such a technique is intended to efficiently recover scum floating on the water surface by reducing the amount of discharged water by arbitrarily combining the rotation angles of scum gaps by combining a striker and a contact metal fitting.

However, in Patent Document 1, it is difficult to adjust the scum skimmer body so as to reduce the frequency of tilting operation. That is, even if the striker is provided in each main body chain at only one place, the striker and the contact metal fitting come into contact with each other once while the main body chain circulates around the sludge scraper once, and the striker is in contact with each other via the link mechanism. The scum gap main body is rotated in the circumferential direction. That is, the scum skimmer main body is driven once while the main body chain circulates around the sludge scraper once. In the past, it was not possible to drive the scum skimmer body at longer time intervals. That is, it was not possible to drive the scum skimmer main body only once when the main body chain circulated around the sludge scraper a plurality of times. If the scum gap main body is driven too many times, the scum gap main body sucks only water instead of scum, which is wasteful.

Therefore, in each of the present embodiments, the scum skimmer 1 that can reduce the frequency of tilting the scum skimmer main body as compared with the conventional case will be described.

FIG. 2 is a side view of the scum gap 1 according to the first embodiment. FIG. 3 is a front view of the peripheral portion of the scum gap 14 main body. As will be described later, the scum skimmer 1 is driven by the sludge scraper 100 as a drive source via the sprocket wheel 104b.

As shown in FIGS. 2 and 3, the scum skimmer main body 14 is a cylindrical member, and is arranged at a position substantially on the water surface w with the length direction as the side direction of the settling basin P. An opening 14a is formed in the upper part of the scum skimmer main body 14 along the longitudinal direction of the cylindrical scum skimmer main body 14. When the scum skimmer main body 14 is not driven, the opening 14a faces upward, and water does not flow into the scum skimmer main body 14 from the opening 14a. When the scum skimmer main body 14 is driven, the opening 14a is tilted toward the water surface w side, and the scum flows into the opening 14a together with the water. Further, as shown in FIG. 3, both ends of the scum skimmer main body 14 are rotatably supported by a bearing 26 on the side surface P3 of the settling basin P.

An arm 15 (second overhanging member) extends downward from the lower part of the scum gap main body 14. Further, a weight support member 16 extends from below the side portion of the scum gap main body 14, and a weight 17 (direction changing member) is provided at the tip end portion of the weight support member 16.

A lever mounting portion 18 is provided on the side portion of the scum skimmer main body 14, and one end of a rod-shaped lever 19 can be inserted into the lever mounting portion 18 with the axial direction of the lever 19 perpendicular to the lever mounting portion 18. By inserting the rod-shaped lever 19 into the lever mounting portion 18, the lever 19 can be manually operated to rotate the scum gap main body 14.

FIG. 4 is a front view of the support shaft 104b1 portion of the sprocket wheel 104b. The support shaft 104b1 is supported by a support member 121 on the side surface P3 of the settling basin P at both ends with the axial direction as the side direction of the settling basin P. The pair of sprocket wheels 104b are inserted through the support shaft 104b1 and are rotatable with respect to the support shaft 104b1. As described above, the chain 102 is stretched on the sprocket wheel 104b.

On the side surface P3 side of each sprocket wheel 104b, a pair of bosses 11 having a certain length are inserted through the support shaft 104b1. The boss 11 is also rotatable with respect to the support shaft 104b1. A cam wheel 12 (first cam wheel) is provided at the end of each boss 11 on the sprocket wheel 104b side. Each cam wheel 12 is in close proximity to the sprocket wheel 104b. A transmission sprocket 13 (first transmission sprocket) is provided at the end of each boss 11 on the side surface P3 side, and rotates in conjunction with the rotation of the cam wheel 12 via the boss 11.

Returning to FIG. 2, a plurality of (10 in the example of FIG. 2) uneven cams 12a (first cams) are continuously formed on the peripheral portion of the cam wheel 12. That is, the cam 12a has a continuous uneven shape in the circumferential direction. As shown in FIGS. 2 and 4, the chain 102 to which a certain flight 103 is attached is provided with a striker 21 (first overhanging member) so as to extend laterally. When the two chains 102 are circulated and driven and the chain 102 provided with the striker 21 reaches the vicinity of the peripheral surface of the cam wheel 12, the striker 21 presses the convex shape of the cam 12a to transmit the cam wheel 12 and thus. Rotate the sprocket 13. This rotation continues until the striker 21 and the convex shape of the cam 12a are disengaged. As a result, the cam wheel 12, and thus the transmission sprocket 13, rotate by a predetermined angle. Since there are two chains 102, it is necessary to arrange the strikers 21 so that the strikers 21 start pressing the convex shape of the cam 12a and the timing until the pressing ends is the same for both chains 102.

As shown in FIGS. 2 and 3, a pair of rotating bodies 22 are provided below the scum gap main body 14. Each of the rotating bodies 22 is rotatably supported by a support member 23 provided on the side surface P3 of the settling basin P. The rotating body 22 has a transmission sprocket 24 (second transmission sprocket) arranged on the support member 23 side and a cam wheel 25 (second cam wheel) located inside the settling basin P from the transmission sprocket 24. I have. The transmission sprocket 24 and the cam wheel 25 are coaxially connected, and the cam wheel 25 also rotates in conjunction with the rotation of the transmission sprocket 24. The cam wheel 25 is located directly below the arm 15. A cam 27 (second cam) extending outward is provided on the peripheral portion of the cam wheel 25. One cam 27 is provided on the peripheral portion of the cam wheel 25, or a plurality of cams 27 are provided at intervals from each other. In the example of FIG. 2, it is one. When the cam wheel 25 rotates and the cam 27 pushes the arm 15, the scum skimmer main body 14 is driven to rotate counterclockwise in FIG. The cam 27 is removable from the peripheral portion of the cam wheel 25 by a predetermined mechanism, and the number of the cams 27 can be increased or decreased.

As shown in FIG. 2, a chain 28 (second chain) is stretched between the transmission sprocket 13 and the transmission sprocket 24, and the rotation of the transmission sprocket 13 is transmitted to the transmission sprocket 24 to rotate. As a result, the cam wheel 25 (FIG. 3) is rotated. The diameter size of the transmission sprocket 24 is larger than the diameter size of the transmission sprocket 13. A shaft 32 having one end rotatable about a fulcrum 31 is provided above the chain 28, and a weight 33 is provided at the other end of the shaft 32. The weight 33 is located on the chain 28 and pressurizes the chain 28 to prevent the chain 28 from loosening.

Next, the action and effect of the scum skimmer 1 according to the first embodiment will be described.
When the chain 102 is circulated and driven by the sludge scraper 100, if only one striker 21 is provided for each chain 102, the chain 102 circulates once and the striker 21 is used as a cam 12a on the cam wheel 12. Each time one convex shape is pressed, the cam wheel 12 rotates by a predetermined angle, and the transmission sprocket 13 also rotates by the same angle. This rotation is transmitted to the transmission sprocket 24 via the chain 28, and the transmission sprocket 24 and thus the cam wheel 25 also rotate by a predetermined angle. At this time, since the transmission sprocket 24 has a larger diameter than the transmission sprocket 13, the rotation angles of the transmission sprocket 24 and the cam wheel 25 are smaller than the rotation angle of the transmission sprocket 13.

In order for the transmission sprocket 13 to make one rotation, the chain 102 must be circulated and driven by the number of convex shapes of the cam 12a on the cam wheel 12. Further, the transmission sprocket 24 has a larger diameter than the transmission sprocket 13. Therefore, in order for the transmission sprocket 24 and thus the cam wheel 25 to make one rotation, the cam wheel 12 and thus the transmission sprocket 13 need to rotate a plurality of times.

Therefore, when only one cam 27 is provided on the cam wheel 25 as shown in FIG. 3, a large number of circulation drives of the chain 102 are performed by the time the cam 27 drives the scum gap main body 14 once. Must be done. The scum skimmer main body 14 is driven once until the cam 27 engages with the arm 15 and the engagement is released. On the other hand, in the technique of Patent Document 1, the scum skimmer main body 14 is driven once for each circulation drive of the chain of the sludge scraper. That is, according to the scum skimmer 1 according to the first embodiment, the frequency of tilting the scum skimmer main body 14 can be reduced as compared with the conventional case.

The scum gap main body 14 is driven while the cam 27 is in contact with the arm 15, but if the contact between the cam 27 and the arm 15 is released, the scum gap main body 14 is restored due to the weight of the weight 17. Return to position. Instead of the weight 17, the scum skimmer main body 14 may be returned to the original position by the urging force of the spring.

In the example shown in the drawings of the first embodiment, only one striker 21 is provided in the chain 102, only one cam 27 is provided in the cam wheel 25, and the cam 12a in the cam wheel 12 is provided. There are also many convex shapes. The diameter of the transmission sprocket 13 and the transmission sprocket 24 is larger than that of the latter. Therefore, the frequency with which the scum gap main body 14 is driven once is considerably reduced.

Further, in order to reduce the frequency with which the scum gap main body 14 is driven once, the number of uneven shapes of the cam 12a in the cam wheel 12 can be further increased. Alternatively, the diameter size of the transmission sprocket 13 and the transmission sprocket 24 may be made slightly smaller in the former.
On the contrary, in order to increase the frequency in which the scum gap main body 14 is driven once a little more, the cam 27 is detachable from the cam wheel 25, so that the number of cams 27 is two at a predetermined interval from each other. You may increase it to the above.

Further, the number of strikers 21 provided on the chain 102 may be two or more at predetermined intervals. Alternatively, the cam wheel 12 may be replaced with a cam wheel 12 having a slightly smaller number of convex shapes of the cam 12a. Alternatively, the diameter size of the transmission sprocket 13 and the transmission sprocket 24 may be made slightly larger in the former case.
The lever 19 can manually tilt and drive the scum gap main body 14.

In the second embodiment, the same reference numerals as those of the first embodiment are used for the members and the like common to the first embodiment, and detailed description thereof will be omitted. Hereinafter, the differences between the second embodiment and the first embodiment will be mainly described.
FIG. 5 is a side view of the scum gap 1 according to the second embodiment. FIG. 6 is a cross-sectional view taken along the line AA of FIG.

In the second embodiment, the transmission sprocket 51 (third transmission sprocket) is interposed between the transmission sprocket 13 (first transmission sprocket) and the transmission sprocket 24 (second transmission sprocket). The transmission sprocket 51 (FIG. 6) is rotatably supported on the side surface P3 of the settling basin P at an intermediate position between the transmission sprocket 13 and the transmission sprocket 24. A chain 52 (third chain) is stretched between the transmission sprocket 13 and the transmission sprocket 51. The transmission sprocket 53 (fourth transmission sprocket) is coaxially supported with the transmission sprocket 51 and rotates in conjunction with the rotation of the transmission sprocket 51. The transmission sprocket 51 is hidden behind the transmission sprocket 53 in FIG. Further, the transmission sprocket 53 is hidden behind the transmission sprocket 24 in FIG.

A chain 54 (fourth chain) is stretched between the transmission sprocket 53 and the transmission sprocket 24 (second sprocket). Unlike the first embodiment, the cam wheel 25 is not connected to the transmission sprocket 24, and the cam wheel 25 is not used.

Instead of providing the striker 55 ( third overhanging member) on the peripheral portion of the rotating body 22 in the first embodiment, the chain 54 is provided with only one or a plurality of strikers 55 in the length direction thereof. There is. The chain 54 has a portion provided with the striker 55 and a portion not provided with the striker 55. The striker 55 (third overhanging member) is also detachable from the chain 54 by a predetermined mechanism.

The striker 55 projects from the side portion of the chain 54, comes into contact with the arm 15 (second overhang member), and pushes out the arm 15. This drives the scum gap 14 main body. In the second embodiment, the diameter size of the transmission sprockets 51 and 53 is substantially the same as the diameter size of the transmission sprocket 24. Further, the two weights 33 are provided to take the slack of the chains 52 and 54, respectively.

Next, the actions and effects of Example 2 will be described.
Also in the second embodiment, the frequency with which the scum skimmer main body 14 is driven is conventionally determined by the functions of the striker 21 and the cam 12a provided on the chain 102 and the difference in diameter between the transmission sprocket 13 and the transmission sprocket 24, 51, 53. It can be reduced as compared with.
Further, in the second embodiment, the chain 54 has a portion in which the striker 55 is provided and a portion in which the striker 55 is not provided. A plurality of strikers 55 provided on the chain 54 can be continuously provided.

FIG. 7 is a perspective view (a) and a front view (b) of a portion near the scum skimmer main body 14 in a state where the striker 55 and the arm 15 are not in contact with each other. In this state, there is a gap α between the chain 54 and the arm 15, and the scum gap main body 14 is not driven via the arm 15.
FIG. 8 is a perspective view (a) and a front view (b) of a portion near the scum skimmer main body 14 in a state where the striker 55 and the arm 15 are in contact with each other. In this state, the striker 55 and the arm 15 come into contact with each other to drive the scum gap main body 14.

At this time, the time during which the scum skimmer main body 14 is driven at one time can be adjusted by the number of strikers 55 continuously arranged on the chain 54. That is, if the number of continuously arranged strikers 55 is increased, the time for driving the scum skimmer main body 14 at one time is lengthened, and if the number of strikers 55 is decreased, the time for driving the scum skimmer main body 14 at one time is shortened. Can be done.
Further, since the striker 55 is detachable from the chain 54, the drive time of the scum gap main body 14 can be adjusted later.

The present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations. Further, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is also possible to add / delete / replace a part of the configuration of each embodiment with another configuration.

1 scum gap 12 cam wheel (1st cam wheel)
12a cam (1st cam)
13 Transmission sprocket (1st transmission sprocket)
14 Scum gap body 14a Opening 15 Arm (second overhanging member)
17 Weight (direction change member)
21 Striker (1st overhanging member)
22 Rotating body 24 Transmission sprocket (second transmission sprocket)
25 cam wheel (second cam wheel)
27 cam (2nd cam)
28 chains (second chain)
51 Transmission sprocket (3rd transmission sprocket)
52 chain (3rd chain)
53 Transmission sprocket (4th transmission sprocket)
54 chains (4th chain)
55 Strike ( third overhanging member)
100 Sludge scraper 102 Chain (1st chain)
103 Flight P Settling basin

Claims (6)

It is a scum gap driven by a sludge scraper that circulates and drives the first chain, which is installed in a settling basin and has multiple flights attached, to scrape sludge from the bottom of the pond into a predetermined position.
A scum skimmer main body that is provided at the water surface position of the sedimentation basin so as to be tiltable and has a cylindrical opening for taking in water.
A plurality of concave-convex first cams are continuously formed on the peripheral portion, and one or a plurality of first overhanging members projecting from the first chain press the convex shape of the first cam, respectively. The first cam wheel that rotates by one convex shape,
A first transmission sprocket coaxially connected to the first cam wheel,
A second transmission sprocket connected to the first transmission sprocket via a second chain,
A second cam wheel coaxially connected to the second transmission sprocket and provided with one or more second cams on the peripheral portion.
A second overhanging member provided at the bottom of the scum skimmer body, which is pushed by the second cam to tilt the scum skimmer body around an axis and take in scum floating on the water surface of the settling basin from the opening.
Provided in the Sukamusukima body, and the weight directing the opening on the upper side when the engagement between the second flared member and the second cam is released,
A scum gap characterized by being equipped with. It is a scum gap driven by a sludge scraper that circulates and drives the first chain, which is installed in a settling basin and has multiple flights attached, to scrape sludge from the bottom of the pond into a predetermined position.
A scum skimmer main body that is provided at the water surface position of the sedimentation basin so as to be tiltable and has a cylindrical opening for taking in water.
A plurality of concave-convex first cams are continuously formed on the peripheral portion, and one or a plurality of first overhanging members projecting from the first chain press the convex shape of the first cam, respectively. The first cam wheel that rotates by one convex shape,
A first transmission sprocket coaxially connected to the first cam wheel,
A third transmission sprocket connected to the first transmission sprocket via a third chain,
A fourth transmission sprocket coaxially connected to the third transmission sprocket,
A second transmission sprocket connected to the fourth transmission sprocket via a fourth chain,
A third overhanging member provided on the fourth chain and having one or a plurality of continuous members provided on the fourth chain in the length direction thereof.
With a second overhanging member provided at the bottom of the scum skimmer main body and pushed by the third overhanging member to tilt the scum skimmer main body around an axis and take in scum floating on the water surface of the settling basin from the opening. ,
And the weight the Sukamusukima provided in the main body, directing the opening when the engagement between the third projecting member and the second flared member is released on the upper side,
A scum gap characterized by being equipped with. The second cam can freely wear de with respect to the second cam wheel,
The scum gap according to claim 1. The third overhanging member is removable from the fourth chain .
The scum gap according to claim 2 , wherein the scum gap is characterized by the above. The diameter size of the second transmission sprocket is larger than that of the first transmission sprocket .
The scum gap according to claim 1. A sludge scraper that circulates and drives the first chain, which is installed in the settling basin and has multiple flights attached, to scrape the sludge from the bottom of the pond into place.
The scum gap according to any one of claims 1 to 5 .
A sludge treatment device characterized by being equipped with.

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