KR102166169B1 - Circular sludge collector with movable retention plate - Google Patents

Abstract

The present invention relates to a circular sludge collector equipped with a movable reservoir plate. The circular sludge collector includes a circular sedimentation basin that slopes downward toward the center to collect sludge; an inlet pipe installed vertically at the center of the sedimentation basin to allow raw water containing sedimentary solids to flow into the sedimentation basin; a center column installed on the outside of the inlet pipe to allow raw water to be distributed and discharged radially from the center of the settling basin and provided with a support bearing at the top; a center cage rotatably installed on the outside of the center column; a scraper arm installed to rotate with the center cage and scraped to discharge solids from the bottom of the settling basin; a walkway supported by a support bearing and installed at the upper end of the center column to rotate with the center cage, the walkway being supported by a drive unit at the upper end of the settling basin to rotate together with the center cage by the operation of the drive unit; a center well that is fixed to the outside of the center cage around the center cage and opened downward, thereby forming turbulent flow of raw water discharged from the center column to cause collision and aggregation between solids contained in the raw water; a movable downward flow storage plate that is horizontally fixed around the center cage and reduces downward flow, which is a cause of sludge disturbance; a vertical movement guide shaft installed vertically to guide the elevation of the movable downward flow storage plate; and a downward flow plate lifting drive unit installed to lift the movable downward flow storage plate.

Description

Circular sludge collector with movable retention plate}

The present invention relates to a circular sludge collector equipped with a movable reservoir plate, and more particularly, to reduce a strong downward flow generated by opening the lower part of a center well, thereby preventing sludge injury due to disturbance of the sludge deposited in the lower part of the settling basin. By doing so, it relates to a circular sludge collector equipped with a movable reservoir plate to improve the water quality of the final treated water.

In general, the circular sludge collector, which is a gravity-type thickening tank mainly used for solid-liquid separation in sewage and wastewater treatment facilities or water purification facilities, retains the sludge in the settling basin and concentrates it using gravity, and then a scraper that rotates the concentrated sludge settled on the bottom. It is to be collected toward the hopper at the center of the furnace and discharged through the discharge pipe.

Such a circular sludge collector has a structure in which overflow wear is installed around the top, and a scraper rotated by a motor is installed on the floor inclined to the inside, and the raw water inlet pipe into which raw water is introduced has a discharge end It is installed so as to be located on the inside of the floor, and the sludge on the floor is collected in one place by the scraper and is forcibly discharged to the outside, and the supernatant water is discharged to the outside through the overflow wear.

As a technology related to a conventional circular sludge collector, a "circular sludge collector" of Korean Patent Laid-Open Publication No. 10-2016-0015867 has been proposed, which is a rotary sludge scraper for collecting sludge settled on the bottom of the settling basin with a hopper installed in the center. Is installed, and a rotary sludge discharger is provided at the center of the bottom of the settling basin so that the precipitated sludge is not accumulated and discharged smoothly through the sludge discharge pipe, and the raw water and coagulant are uniformly agitated in the upper center of the settling basin. A stirring drum is provided to allow the flow to overflow, and a stirring blade is rotatably installed inside the stirring drum, and a raw water inlet pipe is connected to the stirring drum, and an in-line blender and A spiral stirrer is installed to mix the coagulant and coagulant aid injected into the coagulant input pipe and the coagulant aid input pipe with raw water, and a reaction drum is installed outside the stirring drum, and the stirring blade, sludge scraper and sludge discharger inside the stirring drum It is to be driven by a power generator provided in the upper center of the settling basin.

Such a conventional technique serves to improve treatment performance by preventing a short-circuit flow in which the introduced raw water is directly transferred to the overflow ware along the water surface. However, since the lower part of the center well corresponding to the reaction drum is completely open, a strong downward flow occurs, and this downward flow disturbs the sludge deposited in the lower part of the settling basin, thereby reducing the water quality of the final treated water due to sludge floatation. It has a problem of causing adverse effects on the subsequent sludge treatment process by reducing the concentration of sludge discharged from the bottom.

In the case of a sewage treatment plant sedimentation basin, the amount of water inflow to the treatment plant tends to increase over time due to an increase in the number of people in the treatment area, and there are many cases where the inflow water volume temporarily increases significantly during rain. On the other hand, in the case of the biological secondary sedimentation basin, since the bioreactor MLSS concentration is high in winter, the solids load tends to increase significantly, and due to this, the sludge interface of the sedimentation basin in winter is maintained higher than in summer. Therefore, it is required to develop a sedimentation facility capable of optimally responding to changes in inflow flow rate and changes in sludge interface.

In order to solve the problems of the prior art as described above, the present invention reduces the strong downward flow caused by opening the lower part of the center well, and thereby prevents sludge injury due to disturbance of the sludge deposited in the lower part of the settling basin. The purpose is to improve the quality of the water and to increase the concentration of sludge discharged from the bottom so that subsequent sludge treatment can be smoothly performed.

In addition, an object of the present invention is to increase the treatment efficiency of raw water by optimally responding to changes in the inflow flow rate of raw water and sludge interface changes by period.

Other objects of the present invention will be easily understood through the description of the following embodiments.

In order to achieve the object as described above, according to an aspect of the present invention, a circular settling basin inclined downward toward the center to collect sludge; An inlet pipe installed vertically in the center of the settling basin and allowing raw water containing sedimentary solids to flow into the settling basin; A center column installed outside the inlet pipe, allowing the raw water to be distributed and discharged radially from the center of the settling basin, and having a support bearing at an upper end thereof; A center cage rotatably installed outside of the center column; A scraper arm installed so as to rotate with the center cage and scraped so as to discharge solids from the bottom of the settling basin; A walkway supported on the support bearing side and installed at the upper end of the center column so as to rotate together with the center cage, and supported by a drive unit at the upper end of the settling basin, thereby rotating together with the center cage by the operation of the drive unit; A center well that is fixed to the outside of the center cage around the center cage, and is opened downward, so that the raw water discharged from the center column forms a turbulent flow so that collisions and aggregations between solids contained in the raw water occur; A movable downward flow storage plate that is horizontally fixed around the center cage and reduces a downward flow that causes sludge disturbance; A vertical movement guide shaft installed vertically to guide the elevation of the movable downward flow storage plate; And a storage plate lifting drive unit that is installed to lift the movable downward flow storage plate. A circular sludge collector with a movable storage plate is provided.

Each installed in the center cage so as to be arranged in a plurality of vertically spaced around the center column, it may further include a fixed downward flow storage plate for reducing the downward flow.

The movable downstream flow storage plate may be provided with a downward flow preventing jaw to prevent downward flow adjacent to the fixed downstream flow storage plate.

The center well, a center well fixed side wall fixed to the center cage; A center well movable side wall which is provided to extend downward from the center well fixed side wall, and is guided by a vertical movement guide shaft by a flexible corrugated structure so that the height of the lower end can be adjusted; And a side wall elevation driving unit for raising and lowering the lower end of the center well movable side wall.

In the movable downward flow storage plate, an outlet storage plate located below the center well movable side wall may be installed on an upper side.

At the lower end of the movable downward flow storage plate and the center well movable sidewall, a position check bar provided with a scale for position check along a longitudinal direction may be vertically fixed upward, respectively.

According to the circular sludge collector equipped with the movable reservoir plate according to the present invention, it is possible to reduce the strong downward flow generated by opening the lower part of the center well, and thereby prevent the sludge injury due to disturbance of the sludge deposited in the lower part of the settling basin. Water quality of treated water can be improved, and the concentration of sludge discharged from the bottom can be increased so that subsequent sludge treatment can be smoothly performed, and optimal response to changes in the inflow flow rate of raw water and changes in the sludge interface by period By doing so, it has the effect of increasing the treatment efficiency of raw water.

1 is a side cross-sectional view showing a circular sludge collector equipped with a movable storage plate according to an embodiment of the present invention.
2 is a side cross-sectional view showing a main part of a circular sludge collector equipped with a movable storage plate according to an embodiment of the present invention.
3 is a cross-sectional view taken along line AA of FIG. 2.
4 is a cross-sectional view taken along line BB of FIG. 2.
5 is a cross-sectional view taken along line CC of FIG. 2.
6 is a side cross-sectional view showing a center well of a circular sludge collector equipped with a movable reservoir plate according to an embodiment of the present invention.
7 is a side cross-sectional view for explaining the operation of the main portion of the circular sludge collector equipped with a movable storage plate according to an embodiment of the present invention.

In the present invention, various changes may be made and various embodiments may be provided, and specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to a specific embodiment, and should be understood in a way that includes all changes, equivalents, or substitutes included in the technical spirit and scope of the present invention, and may be modified in various other forms. It can be, and the scope of the present invention is not limited to the following examples.

Hereinafter, exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings, and the same reference numerals are assigned to the same or corresponding components regardless of the reference numerals, and redundant descriptions thereof will be omitted.

1 is a side cross-sectional view showing a circular sludge collector equipped with a movable storage plate according to an embodiment of the present invention, and FIG. 2 is a view showing a main part of a circular sludge collector equipped with a movable storage plate according to an embodiment of the present invention. It is a side cross-sectional view, and FIG. 3 is a plan cross-sectional view showing a main part of a circular sludge collector equipped with a movable storage plate according to an embodiment of the present invention.

1 to 3, a circular sludge collector 100 equipped with a movable reservoir plate according to an embodiment of the present invention includes a settling basin 110, an inlet pipe 120, a center column 130, and a center cage 140. ), a scraper arm 150, a walkway 160, a center well 170, a movable downward flow storage plate 180, a vertical movement guide shaft 190, and a storage plate elevation driving unit 210.

The sedimentation basin 110 has a circular storage tank structure inclined downward toward the center to collect sludge. The settling basin 110 is provided with an overflow wear 111 for discharging the treated water by overflow of the treated water around the top.

The inlet pipe 120 is installed vertically at the center of the settling basin 110 and receives raw water containing sedimentary solids so that the raw water flows into the settling basin 110.

The center column 130 is made of a hollow pipe to surround the inlet pipe 120 and is installed outside the inlet pipe 120, and raw water is distributed and discharged radially from the center of the settling basin 110, and the raw water is discharged from the center. A plurality of discharge ports 131 may be formed at intervals along the periphery at the top so as to be distributed radially. In addition, the center column 130 is provided with a support bearing 132 for supporting rotation of the center cage 140 at the top.

The center column 130 is not only a facility for radially distributing raw water introduced through the inlet pipe 120 from the center of the settling basin 110, but also a walkway 160 and a center cage installed on the center column 130. 140). Due to the support bearing 132 installed between the center column 130 and the walkway 160, the walkway 160 can rotate based on the center of the center column 130.

The center cage 140 is installed rotatably outside the center column 130. The center cage 140 may include a plurality of vertical frames and a horizontal frame connecting the plurality of horizontal frames, and a plurality of reinforcing frames installed at an incline for reinforcement therebetween.

The center cage 140 is installed to fix the heavy center well 170 and the scraper arm 150, and may be configured to rotate together with the walkway 160 by being installed on the support bearing 132.

The scraper arm 150 is installed to rotate together with the center cage 140, and is to be scraped and collected so as to discharge the solids from the bottom of the settling basin 110, and at a side facing the bottom of the settling basin 110 at a certain distance. A scraper is provided to scrape solids. The scraper arm 150 is connected to and fixed to any one of the center cage 140 and the center well 170 by means of a fixing member 151 in order to rotate together with the center cage 140, or the center cage as in this embodiment. It may be connected and fixed to both the 140 and the center well 170 by the fixing member 151.

The scraper arm 150 is installed on the bottom of the sedimentation basin 110 to scrape and collect the sunken solids into the central part of the sedimentation basin 110, and the sediment collected in the central part is a discharge pipe installed in a hopper (not shown) under the sedimentation basin 110 (not shown) To be discharged through.

The walkway 160 is supported on the support bearing 132 side and installed at the top of the center column 130 to rotate with the center cage 140 to serve as a passage for maintenance and management, and at the top of the settling basin 110 By being supported by the driving unit 161, it rotates together with the center cage 140 by the operation of the driving unit 161. Here, the workway 160 is supported on the support bearing 132 side by being directly rotatably supported by the support bearing 132 or fixed to the center cage 140 which is directly rotatably supported by the support bearing 132 As a result, it may be rotatably supported with respect to the support bearing 132. In addition, the driving unit 161 may be configured to travel along the upper end of the settling basin 110 by, for example, a wheel that is rotated by a driving force of a motor.

1, 2 and 6, the center well 170 is fixed to the outside of the center cage 140 around the center cage 140, and is opened downward, thereby being discharged from the center column 130. Raw water creates turbulent flow, causing collision and aggregation between solids contained in raw water.

The center well 170 is distributed radially in the center column 130 so that the horizontally flowing raw water does not sufficiently stay inside the sedimentation basin 110, and prevents a short-circuit current flowing out to the overflow wear 111 along the water surface layer. It is a facility for. Due to the turbulence generated inside the center well 170, collisions and coagulation between the solids contained in the raw water occur, thereby improving the sedimentation of the solids, and improving the water quality of the treated water by securing a sufficient residence time in the settling basin 110 It plays a role to let.

The center well 170 is provided to extend downward from the center well fixed side wall 171 and the center well fixed side wall 171 fixed to the center cage 140, and the vertical movement guide shaft by a flexible corrugated structure By elevating the lower end of the center well movable side wall 172 and the lower end of the center well movable side wall 172, which is guided by 190, the vertical width of the center well movable side wall 172, that is, It may include a side wall elevation driving unit 173 for varying the height.

The center well-fixed sidewall 171 is a cylindrical structure whose upper end is fixed to the center cage 140, and is formed to open the lower side.

The center well movable side wall 172 is a cylindrical corrugated part 172a made of a flexible synthetic resin or rubber, etc., and a connecting part 172b connecting the corrugated part 172a to each other in a number of verticals, and a connection part By connecting the (172b) to each other, a limit wire (172c) for limiting the wrinkle portion (172a) from being unreasonably elongated by its own weight, and a vertical movement guide shaft (190) on the connecting portion (172b) so that the vertical movement is possible It may include a sliding coupling portion (172d) to be coupled.

The center well movable side wall 172 is installed under the center well fixed side wall 171 and adjusts the height according to the operating conditions of the settling basin 110, and this height is adjusted to the outside of the center well 170 according to the flow condition of the incoming raw water. The area of the open surface that discharges raw water can be properly adjusted.

The sidewall elevation driving part 173 is, for example, a wire 173a connected to the lower side of the center well movable sidewall 172, specifically, a connection member 231 fixed to extend thereto, as in this embodiment, , It may include a roller 173b for supporting the wire 173a to be movable, and a winding machine 173c for winding the wire 173a supported on the roller 173b.

The movable downward flow storage plate 180 is fixed horizontally around the center cage 140 and reduces downward flow, which is the cause of the sludge disturbance, and may have a circular disk shape with an open center as in this embodiment. .

The movable downward flow storage plate 180 is installed under the center well 170 and reduces the downward flow that causes sludge disturbance. The height of the movable downstream storage plate 180 can be adjusted according to the operating conditions of the settling basin 110 such as the height of the sludge interface. A position check bar 230, which will be described later, may be used to confirm the position of the movable downward flow storage plate 180 from the top of the settling basin 110.

The movable downward flow storage plate 180 may be provided so that the sliding coupling portion 181 corresponds to each of the vertical movement guidance shaft 190 for sliding coupling for vertical movement from the vertical movement guidance shaft 190, and the center well movable side wall The outlet storage plate 183 located at the lower side of 172 may be installed on the upper side by the support 184 for fixing the outlet storage plate. The outlet storage plate 183 may secure a minimum open surface for the outflow of raw water. 7 shows that the movable downward flow storage plate 180 moves downward and the center well movable side wall 172 extends downward.

The vertical movement induction shaft 190 is installed vertically to guide the elevation of the movable downward flow storage plate 180, and may be formed in a plurality to guide a plurality of portions of the movable downward flow storage plate 180, and a horizontal guidance shaft They may be connected to each other by a fixing support 191 and fixed to the outside of the center cage 140. Meanwhile, the vertical movement guide shaft 190 may be additionally provided to guide the elevation of the center well movable side wall 172 as described above.

The storage plate lifting drive unit 210 is installed to lift the movable downward flow storage plate 180, for example, a wire 211 connected to the movable downward flow storage plate 180 so as to be drawn upwardly as in this embodiment, and , It may include a roller 212 for supporting the wire 211 to be movable, and a winding machine 213 for winding the wire 211 supported by the roller 212.

Around the center column 130, a plurality of fixed downward flow storage plates 220 arranged at vertical intervals are installed on the center cage 140, respectively, so that the above downward flow is controlled by the fixed downward flow storage plate 220. You can try to reduce it. When the center cage 140 is installed outside the center column 130, the movable downward flow storage plate 180 is configured outside the center cage 140, so that between the center column 130 and the movable downward flow storage plate 180 The sludge layer may be disturbed by the downward flow through the space of In order to minimize this space, a fixed downward flow storage plate 220 is installed in the center cage 140 at appropriate intervals.

The movable downstream flow storage plate 180 may be provided with a downward flow prevention protrusion 182 adjacent to the fixed downstream flow storage plate 220 to prevent downward flow. Since the fixed downward flow storage plate 220 is installed at regular intervals, downward flow may occur when the movable downward flow storage plate 180 is positioned between the fixed downward flow storage plate 220. In order to minimize this, the movable downward flow storage plate 180 is provided with a downward flow prevention protrusion 182. The height of the downward flow prevention jaw 182 may be greater than or equal to the installation interval of the fixed downward flow storage plate 220.

Position check bars 230 on which a scale for position check is provided along the length direction may be fixed vertically upwards at the lower ends of the movable downward flow storage plate 180 and the center well movable side wall 171. At this time, in order to install the position check bar 230, a connection member 231 that mediates a connection between them by bolting, riveting, or welding may be used.

According to such a circular sludge collector equipped with a movable reservoir plate according to the present invention, it is possible to reduce the strong downward flow generated by opening the lower part of the center well, thereby preventing sludge injury due to disturbance of the sludge deposited in the lower part of the settling basin. By doing so, the water quality of the final treated water can be improved, and the concentration of sludge discharged from the bottom can be increased so that subsequent sludge treatment can be smoothly performed, and optimal for changes in the inflow flow rate of raw water and changes in the sludge interface by period. By doing so, it is possible to increase the treatment efficiency of raw water.

As described above, the present invention has been described with reference to the accompanying drawings, but, of course, various modifications and variations can be made without departing from the technical spirit of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims and equivalents as well as the claims to be described later.

110: sedimentation pond 111: overflow wear
120: inlet pipe 130: center column
131: discharge port 132: support bearing
140: center cage 150: scraper arm
151: fixing member 160: walkway
161: drive unit 170: center well
171: center well fixed side wall 172: center well movable side wall
172a: wrinkled portion 172b: connecting portion
172c: limit wire 172d: sliding coupling part
173: side wall elevation drive unit 173a: wire
173b: roller 173c: winding machine
180: movable downward flow storage plate 181: sliding coupling
182: downward flow bump 183: outlet reservoir plate
184: outlet storage plate fixing support 190: vertical movement guide shaft
191: guide shaft fixing support 210: storage plate elevating drive unit
211: wire 212: roller
213: winding machine 220: fixed downward flow storage plate
230: position check bar 231: connecting member

Claims (6)

A circular sedimentation basin that slopes downward toward the center to collect sludge;
An inlet pipe installed vertically in the center of the settling basin and allowing raw water containing sedimentary solids to flow into the settling basin;
A center column installed outside the inlet pipe, allowing the raw water to be distributed and discharged radially from the center of the settling basin, and having a support bearing at an upper end thereof;
A center cage rotatably installed outside of the center column;
A scraper arm installed so as to rotate with the center cage and scraped so as to discharge solids from the bottom of the settling basin;
A walkway supported on the support bearing side and installed at the upper end of the center column so as to rotate together with the center cage, and supported by a drive unit at the upper end of the settling basin, thereby rotating together with the center cage by the operation of the drive unit;
A center well that is fixed to the outside of the center cage around the center cage, and is opened downward, so that the raw water discharged from the center column forms a turbulent flow so that collisions and aggregations between solids contained in the raw water occur;
A movable downward flow storage plate that is horizontally fixed around the center cage and reduces a downward flow that causes sludge disturbance;
A vertical movement guide shaft installed vertically to guide the elevation of the movable downward flow storage plate;
A storage plate lifting drive unit installed to lift the movable downward flow storage plate;
A fixed downward flow storage plate each installed in the center cage so as to be arranged in a plurality of vertically spaced around the center column, and reducing the downward flow;
Including,
The movable downstream storage plate,
A circular sludge collector provided with a movable storage plate, provided with a downward flow barrier for preventing downward flow adjacent to the fixed downward flow storage plate. delete delete The method according to claim 1,
The center well,
A center well fixed side wall fixed to the center cage;
A center well movable side wall which is provided to extend downward from the center well fixed side wall, and is guided by a vertical movement guide shaft by a flexible corrugated structure so that the height of the lower end can be adjusted; And
A side wall lifting driver for lifting a lower end of the center well movable side wall;
Containing, a circular sludge collector provided with a movable reservoir plate. The method of claim 4,
The movable downward flow storage plate,
A circular sludge collector equipped with a movable storage plate, in which an outlet storage plate located at a lower side of the center well movable sidewall is installed on the upper side. The method of claim 4,
At the lower end of the movable downward flow storage plate and the center well movable side wall,
A circular sludge collector equipped with a movable storage plate in which a position check bar provided with a scale for position check along the longitudinal direction is fixed vertically upwards.

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