JP2008296207A - Sediment-discharging settling tank - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sediment-discharging settling tank which is a settling tank from which supernatant water overflows, wherein deposits settled on the bottom of the tank is forcedly concentrated, and only the concentrated sediment is forcedly discharged therefrom intermittently. <P>SOLUTION: An open-ended cylinder as a feed path is disposed in a tank body, and the positions of the upper and lower open ends of the cylinder are suitably determined. An opening and closing cock extending along the height between the upper surface of a sediment exit provided at the center of the bottom of the tank and the upper edge of the inside of the tank body and having a fixed propeller at the lower part is inserted vertically into the central part of the tank body, and the opening and closing of the sediment exit is closed with the lower end of the opening and closing cock by making free the vertical motion of the opening and closing cock. A guide shaft that freely guides the vertical slide and axial rotation of the opening and closing cock is pivotally supported on the upper part of the opening and closing cock. Further, the tank is characterized in that the tank body is provided with a vibrator, and a water level window communicating with the inside of the cylinder is provided outside the tank. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  In the present invention, the suspended water supplied is settled and separated, and in the sedimentation tank where the supernatant water overflows and discharges outside the tank body, the concentration of sedimentation mud that settles and deposits on the bottom of the tank body is forced and this concentration is performed. The present invention relates to a settling basin for discharging sedimentary mud, in which only the mud is forcibly discharged sequentially from the bottom of the tank.

  Conventionally, when the sedimentation mud in the tank increases more than a fixed amount, it is removed because the circulation function of the sedimentation tank is hindered. The means is generally a recovery method by stopping liquid circulation in the settling tank and using human power or equipment (mud suction wheel). Therefore, not only a large construction cost is incurred for the recovery, but also a loss due to production suspension occurs in the production equipment directly connected to the settling tank. Furthermore, there are concerns about human damage caused by oxygen deficiency and toxic gas in the manual work in the tank. In addition, it is pulled out from the outlet at the bottom of the tank body, or it is pulled out by opening the attached valve. The amount of work related to the subsequent mud treatment is inevitably increased.

  In the settling tank in which the suspended water supplied is settled and separated and the supernatant water overflows and discharges outside the tank body, the sludge settles on the wall surface of the settling mud and settles on the bottom of the tank body and solidifies. In addition to improving the performance, forced concentration is performed, and even if the sedimentation tank is in operation, only the concentrated mud that has accumulated beyond the fixed quantity is forcibly discharged sequentially from the bottom of the tank body without pausing it. To try to make it smooth.

  The supplied suspended water settles and separates in the tank body whose bottom surface is inclined downward and narrows. The sediment is deposited on the bottom of the tank body, and the supernatant water overflows from the drain and is discharged out of the tank. In the settling tank as described above, in the cylinder body having the lower end opening portion of the cylindrical cylinder that is vertically supported as a passage opening and having the upper end opening portion as a bypass opening, the height of the lower end of the cylinder body is the same as the bottom surface of the tank body. Supply the suspended water by keeping the distance interval arbitrarily and setting it at a position lower than the position height of the drain outlet, and placing the cylinder with a length that makes the position height of the upper end higher than the position height of the drain outlet in the tank. A mouth is provided in the cylinder wall. In addition, a mud outlet is provided at the center of the bottom of the tank body, and the open / close stopper that has a length from the upper surface of the mud outlet to the vicinity of the height of the upper end of the tank body and that has a propeller attached to the lower part is set in the vertical direction. It is inserted in the center of the tank body, and the mud outlet is opened and closed by the lower end of the open / close plug freely by the vertical movement of the open / close plug, and the mud outlet is closed, and the open / close of the open / close plug and the shaft can be freely rotated. A guide shaft that guides to the top of the tank body is disposed at the upper center of the tank body and pivotally supported at the upper end of the opening / closing stopper. Further, the vibration table is fixed to the upper end of the outer wall of the tank body, and the vibration device is mounted on the plane of the vibration table. Furthermore, in a conduit having one end communicating with the cylindrical body and the other end arranged outside the tank body, a water level window opened upward is provided with the position height of the other end being higher than the detour opening at the upper end of the cylindrical body. , Which is characterized by sedimentation mud that discharges sedimentation mud.

  According to the present invention, in a settling tank in which suspended water is circulated, an appropriate impact that spreads throughout the tank body by the activation of the vibration device attached to the settling tank promotes sedimentation and separation of the suspended water in the tank body, and concentrates the sedimented mud. While forcing, it slows wall adhesion and coagulation to increase fluidity.

  The water level in the cylinder rises when the sedimentation height of the concentrated sedimentation mud in the tank reaches a preset height, and the same water level rises in the water level window communicating with the cylinder. At the same time, it is easy to recognize the set sedimentation height of the concentrated sedimentation mud, and the sedimentation mud is discharged accurately.

  Next, set the appropriate values for the weight and rotation speed of the open / close plug that adapts to the strength of the sedimented mud (concentration) so that the open / close plug moves up and down due to the strength of the propeller rotating force, When the stopper is pivoted through the guide shaft, the mud outlet opens and closes, and when it is opened, only the strong concentrated mud of the appropriate value is forcibly discharged, and the weak concentrated mud that does not meet the applicable value remains on the bottom of the tank and closes. . Furthermore, the shock of vibration prompts the concentrated mud to be discharged and dropped when opened.

  Therefore, even in a sedimentation tank in operation, sedimentation mud that accumulates on the bottom of the tank body and impedes its circulation function is concentrated and discharged sequentially out of the tank. Proceed to.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
In the tank body (1) whose bottom surface is inclined downward and narrows, the suspended water supplied from the supply port (2) is settled and separated, and the sediment is deposited on the bottom of the tank body (1), In the sedimentation tank where the clear water overflows from the drain (3) and is discharged outside the tank, the tank (1) part of the side wall is part of the cylinder (5) and the side wall is partially shared A cylindrical body (5) that vertically supports the cylinder body (5) to be opened, has a lower end opening portion of the cylinder opening as a passage opening (6), and has an upper opening portion as a detour opening (7). (5) The distance between the lower end position height and the bottom of the tank body is arbitrarily set, and the position height is set lower than the position height of the drain port (3), and the position height of the upper end is set higher than the position height of the drain port (3). The cylindrical body (5) having such a length is disposed in the tank body (1), and a suspension water supply port (2) is provided on the wall of the cylindrical body (5). Further, a mud outlet (4) is provided at the center of the bottom of the tank body (1), and the length extends from the upper surface of the mud outlet (4) to the vicinity of the height of the upper end in the tank body (1), An open / close stopper (8) with a propeller (9) attached thereto is inserted in the center of the tank body (1) in the vertical direction, and mud by the lower end of the open / close stopper (8) is moved vertically by the open / close stopper (8). The mud outlet (4) is closed by freely opening and closing the outlet (4), and the guide shaft (10) for guiding the opening and closing of the opening and closing plug (8) in the vertical direction and the shaft rotation is freely provided in the tank body (1 ) Install in the upper center and pivotally support the upper end of the stopper.

  Further, the vibration table (11) is fixed to the upper end of the tank body (1), and the vibration device (12) is attached to the center of the plane on the vibration table (11).

  The main effects of vibration by the vibration device (12) are to accelerate the concentration of sedimentation mud, to protect against coagulation and adhesion, to assist in falling discharge, etc., but the properties of the sedimentation mud are not necessarily uniform and their functions A vibration form that effectively works is required. The present invention is an oscillating device (12) in which an eccentric weight is fixed to a rotating shaft of a motor, and a centrifugal vibration generated by the motor rotation is used. The motor controller can convert the frequency. , Intermittent vibration by a timer, etc. are set appropriately.

  In the conduit (13) having one end communicating with the inside of the cylindrical body (5) and the other end arranged outside the tank body (1), the height of the other end is set to the detour opening (7) at the upper end of the cylindrical body (5). A water level window (14) is provided which is higher and opened upward.

  The function of the propeller (9) rotating on the shaft is adapted to the strength of the settling mud (concentration) by its propulsive force, and the plug (8) is moved up and down to open and close the mud outlet (4). At the time of opening, only the concentrated mud is forcibly discharged, but when a water vein forms in the concentrated sedimented mud at this time and expands, muddy water is released. The propeller (9) rotation stirs the concentrated sedimentary mud and suppresses the generation of water veins, but FIG. 2 shows each of the adjacent blades in each propeller (9) with a plurality of blades evenly allocated as a further preventive measure. Are partially overlapped, and the interval between the facing portions of the overlapped portion is appropriately maintained.

  Further, in order to improve the airtightness of the mud outlet (4), the packing is adhered (18) to the upper surface of the mud outlet (4) which is in contact with the lower end of the open / close stopper (8) when closed.

  FIG. 3 shows an installation stand (1) in which the flange (15) is fixed to the middle of the outer wall of the tank body (1), and the tank body (1) is installed at a height where the discharged mud can fall due to a drop from the mud outlet (4). 16) is installed, the mounting base (16) is provided with a stop hole of the flange (15), and the springs of the cushioning material (17) are inserted and clamped on both contact surfaces, and both are loosely attached with bolts. Furthermore, measures are taken to prevent the vibration shock of the tank body (1) from spreading to the periphery, such as by connecting each of the supply port (2) and the drain port (3) with a soft rubber tube.

  In the present invention configured as described above, the suspended water supplied from the supply port (2) into the tank body (1) that continues to vibrate upon activation of the vibration device (12) passes through the cylindrical body (5). Enters the tank body (1) from the passage opening (6) and is separated into specific gravity difference between the sedimented mud and the supernatant water. The sedimented mud accumulates at the bottom of the tank body (1), and the supernatant water overflows from the drain port (3). To do. The impact of vibration in this state slows the wall adhesion and coagulation of the settled mud, and the more concentrated the mud is in the lower layer, the stronger the concentration and the greater the concentration.

  As the suspended water is supplied, the amount of sedimented mud at the bottom of the tank (1) gradually increases while increasing the concentration, and the accumulated mud height concentrated to a strong concentration (hardness) that blocks the supply water flow is the passageway (6). When the position height of the tank (1) is exceeded, the passage (6), which is one path into the tank body (1), is blocked with strong concentrated mud, and the supply suspended water in the cylinder (5) The water level rises from the drain port (3) to the detour port (7) and flows into the tank body (1) from the detour port (7) which is the other path. The water level of the water level window (14) communicating with the inside of the cylinder (5) disposed outside the tank body (1) via the conduit (13) is also the position of the detour port (7) in the same manner as in the cylinder (5). Rise to high.

  Next, the weight and rotation speed of the stopper (8) equipped with the propeller (9) so that the stopper (8) moves up and down appropriately according to the strength (hardness) of the concentrated sedimentary mud. And an ascending water level sensor (not shown) senses the rising water level of the water level window (14) by an attached drive motor (not shown) of the induction shaft (10), and this is detected via the induction shaft (10). The opening / closing stopper (8) is pivoted. In strong enrichment, the propulsion force of the propeller (9) rotating action exceeds the weight of the open / close plug (8), and the open / close plug (8) rises to open the mud outlet (4). Therefore, only the strongly concentrated mud in the lower layer that conforms to this conforming value is forcibly discharged by the weight of the opening / closing plug (8) loaded on the propeller (9) and the rotation of the propeller (9). Furthermore, the impact of vibration promotes the downward movement of the settled mud and assists the fall discharge of the concentrated mud.

  Sediment mud that blocked the passageway (6) moved downward, and was discharged and decreased sequentially from the strongly concentrated portion below it, and eventually the passage of the passageway (6) became free. The muddy water flows into the tank body (1) from the passage opening (6), and the water level in the cylinder (5) also falls to the height of the drain opening (3). As the sediment deposited in the bottom of the tank (1) gradually discharges from the strong concentration section to the weak concentration section, the concentration gradually decreases, and as the concentration decreases, the weight of the open / close plug (8) decreases to the propeller (9) The propulsive force of the rotational action is exceeded, and the open / close plug (8) descends to close the mud outlet (4). Further, the position height of the opening / closing plug (8) when the mud outlet (4) is closed is detected by the drive motor of the induction shaft (10) by a displacement sensor (not shown) to stop the shaft rotation of the opening / closing plug (8). To do.

  Therefore, in the sedimentation tank where the supplied suspension water is settled and separated, and the supernatant water overflows and discharges outside the tank body, the sedimentation sediment exceeds the preset amount even if the sedimentation tank is in operation. Since the concentrated mud is discharged sequentially from the bottom of the tank body, the circulation function of the settling tank proceeds smoothly.

  When the circulation flow rate is a large flow rate that disables the function of the present invention, or when the suspended water suspension (SS) settles slowly and makes it difficult to separate the suspended water within a fixed time, In addition, a sedimentation tank of the prior art that enables these treatments is provided, and the sedimentation mud in the sedimentation tank is recovered by circulating the sedimentation mud at the bottom of the sedimentation tank to the present invention. These means can recover these sediments in the same manner in existing large-sized sedimentation tanks for chemical sedimentation, or sedimentation tanks in which circulation is difficult to stop.

  Perspective longitudinal sectional view of the present invention   The perspective view which shows the Example of the propeller of this invention   The perspective view which shows the AA cross section of this invention, and the Example of an installation part

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tank body 2 Supply port 3 Drain port 4 Mud outlet 5 Cylindrical body 6 Passage port 7 Detour port 8 Opening / closing stopper 9 Propeller 10 Guide shaft 11 Shaking table 12 Vibrating device 13 Conduit 14 Water level window 15 Flange 16 Construction stand 17 Buffer material 18 Packing 19a, 19b, 19c Feather

Claims (4)

  The supplied suspended water settles and separates in the tank body whose bottom surface is inclined downward and narrows. The sediment is deposited on the bottom of the tank body, and the supernatant water overflows from the drain and is discharged out of the tank. In the settling tank as described above, in the cylinder body having the lower end opening portion of the cylindrical cylinder that is vertically supported as a passage opening and having the upper end opening portion as a bypass opening, the height of the lower end of the cylinder body is the same as the bottom surface of the tank body. Supply the suspended water by keeping the distance interval arbitrarily and setting it at a position lower than the position height of the drain outlet, and placing the cylinder with a length that makes the position height of the upper end higher than the position height of the drain outlet in the tank. A port is provided in the cylinder wall, and a mud outlet is provided at the center of the bottom of the tank body. The length is from the upper surface of the mud outlet to the height of the upper end of the tank body, and the propeller is stopped at the lower part. Insert the installed stopper in the center of the tank in the vertical direction, and open and close the mud outlet by the lower end of the stopper by moving the stopper up and down. In addition to closing the mud outlet, the guide shaft that freely guides the sliding of the open / close plug in the vertical direction and the shaft rotation is arranged at the upper center of the tank body and pivotally supported at the upper end of the open / close plug Precipitation mud that discharges sedimentation mud.   The sedimentation gutter which discharge | emits the sedimentation mud of Claim 1 which attached the vibration apparatus to the outer wall department of the tank body.   In a conduit having one end communicating with the cylinder and the other end arranged outside the tank body, a water level window is provided that opens upward with the height of the other end positioned higher than the detour opening at the upper end of the cylinder. Sedimentation gutter which discharges sedimentation mud of item 2.   The settling gutter which discharge | emits the sedimentation mud of Claim 3 which overlap | superposed each adjacent blade | wing in the propeller which allocated the several blade | wing equally, and provided the space | interval between the facing surfaces of the overlap part.

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