KR102487896B1 - decanter for water purification - Google Patents

Abstract

The present invention relates to a mechanical decanter for water treatment and, more specifically, to a mechanical decanter for water treatment installed in a reaction tank of a water treatment apparatus to be mechanically operated when discharging supernatant, thereby moving vertically while efficiently discharging the supernatant. The mechanical decanter for water treatment according to the present invention comprise: a discharge pipe installed to penetrate a lateral wall of the reaction tank; a fixed pipe joined to an upper part of the discharge pipe; a moving pipe having a lower part inserted into the fixed pipe to move vertically and having an upper part through which the supernatant is introduced thereinto; an actuator moving the moving pipe vertically to adjust the height of the moving pipe; and a ware unit installed in the moving pipe to prevent scum from being introduced into the moving pipe. Accordingly, damage or a breakdown does not easily occur and scum can be effectively prevented from being introduced.

Description

Mechanical decanter for water treatment {decanter for water purification}

The present invention relates to a mechanical decanter for water treatment, and more particularly, to a mechanical decanter for water treatment that is installed in a reaction tank of a water treatment device and is mechanically operated when supernatant is discharged to efficiently discharge supernatant while moving vertically. .

In general, in the treatment of sewage, etc., a plurality of reaction tanks are treated with aerobic and anaerobic microorganisms to remove organic matter from the sewage, and then the foreign matter is precipitated and the treated water is drained, but the problem of having a plurality of reaction tanks is solved. Therefore, a sequential treatment method in one reactor was proposed to treat sewage more efficiently. This sewage treatment method is a sequential batch reaction method (SBR method) in which organic matter, nitrogen, phosphorus, etc. are removed by anaerobic and aerobic microorganism treatment after the sewage is introduced, precipitated, and only the treated supernatant is discharged.

In this SBR method, when the sedimentation process is performed for a predetermined period of time through anaerobic and aerobic reactions, sludge is precipitated in the lower layer of the reaction tank, and there is an intermediate layer in which the aggregate is not completely precipitated and flows on top of it, and the surface of the reaction tank is aggregated Since the suspended matter floats, the supernatant treated to be discharged is present in the upper layer between the middle layer in which the aggregate flows and the water surface in which the suspended matter exists. In this way, a so-called decanter is used to drain only the supernatant water while not discharging the floating matter on the surface of the water.

The height of this decanter is usually adjusted according to the water level of the reaction tank, and it is necessary to prevent the discharge of suspended matter on the surface of the water. Decanters are largely divided into floating type and mechanical type according to the way the height is adjusted according to the water level.

The floating type is a method in which the discharge part of the decanter floats on the surface of the water by buoyancy and discharges the supernatant. This floating decanter has the advantage of low manufacturing cost and simple installation, but has a limited discharge capacity and a problem that sludge can be discharged during the aeration process.

On the other hand, the mechanical decanter is a method of discharging supernatant water by reciprocating the discharge part of the decanter up and down using a motor or cylinder, and has the advantage of having a very large discharge capacity per time.

Republic of Korea Patent Publication No. 10-2001-0025520 discloses a treated water discharge device that discharges treated water while moving in a vertical direction by a motor.

The treated water discharge device is deformed while the discharge pipe is bent and straightened when the discharge hopper moves up and down. Since the discharge pipe is continuously deformed when the discharge hopper moves, the life span of the discharge pipe is short and the risk of damage is high.

Republic of Korea Patent Publication No. 10-2001-0025520: Treatment water discharge device

The present invention was created to improve the above problems, and when the supernatant is discharged, the supernatant can be mechanically operated and moved in the vertical direction to discharge the supernatant, and at the same time, it is possible to effectively prevent the inflow of scum without easily causing damage or failure. Its purpose is to provide a mechanical decanter for water treatment.

In order to achieve the above object, the mechanical decanter for water treatment of the present invention is installed in a reaction tank of a water treatment device for purifying wastewater and discharges supernatant water to the outside, which is installed to penetrate the sidewall of the reaction tank discharge pipe; a fixed pipe coupled to an upper portion of the discharge pipe; a moving tube having a lower portion that is movable up and down in a state inserted into the fixed tube and through which supernatant water flows into the inside; an actuator for adjusting the height of the moving pipe by moving the moving pipe up and down; A wear part installed on the moving pipe to prevent scum from entering the moving pipe, wherein the wear part is formed on a floor panel through which the moving pipe passes, and on the front, rear, left, and right edges of the floor panel, It has a side plate formed higher, a supernatant water inlet formed on the side plate and through which supernatant water flows in, and a scum blocking means for blocking the inflow of scum floating on the water surface through the supernatant water inlet.

The scum blocking means includes a side plate spaced apart from the side plate and installed parallel to the outside of the side plate and having an upper part higher than the supernatant water inlet and a lower part lower than the supernatant water inlet.

The scum blocking unit comprises a water level response opening/closing unit for blocking the supernatant water inlet when the water level of the reaction tank is located below the supernatant water inlet and opening the supernatant water inlet when the water surface level of the reaction tank is located above the supernatant water inlet. provide

The water level response opening/closing unit includes a barricade installed on the side plate to block the supernatant water inlet, and an eccentric buoyancy part formed on the upper part of the barricade so as to provide buoyancy to the barricade when the water level of the reaction tank is located at the supernatant water inlet. provide

A water level sensor installed in the reaction tank to measure the water level of the reaction tank and a control panel for controlling the operation of the actuator based on the level value measured by the water level sensor are further included.

As described above, in the present invention, when discharging supernatant water, the supernatant water can be discharged while moving in a vertical direction by being operated mechanically, and at the same time, damage or failure does not easily occur.

In addition, the present invention can effectively prevent scum from being discharged to the outside together with the supernatant by installing the wear unit.

1 is a perspective view of a mechanical decanter for water treatment according to an example of the present invention;
Figure 2 is a side view of Figure 1;
Figure 3 is a cross-sectional view taken from the main part of Figure 1,
Figure 4 is a cross-sectional view for showing the operation of Figure 3,
5 is a perspective view of a mechanical decanter for water treatment according to another example of the present invention;
6 is a perspective view of a mechanical decanter for water treatment according to another example of the present invention;
Figure 7 is a perspective view showing an extract of the main part of Figure 6,
8 is a cross-sectional view of FIG. 7;
9 and 10 are cross-sectional views illustrating the operation of FIG. 7 .

Hereinafter, a mechanical decanter for water treatment according to a preferred embodiment of the present invention will be described in detail.

The mechanical decanter for water treatment of the present invention is installed in the reaction tank 1 of the water treatment device operated by the sequential batch reaction method (SBR method) for purifying wastewater to discharge supernatant water, which is treated water, to the outside. 4 shows a mechanical decanter for water treatment according to an embodiment of the present invention.

1 to 4, the mechanical decanter for water treatment of the present invention includes a discharge pipe 10 installed to penetrate the side wall of the reaction tank 1, a fixed pipe 15 coupled to the upper portion of the discharge pipe 10, and a lower portion In the state of being inserted into the fixed tube 15, the moving tube 20 is movable up and down and the supernatant water flows into the inside through the upper part, and the height of the moving tube 20 is adjusted by moving the moving tube 20 up and down. actuator and a wear part 80 installed on the moving pipe 20 to prevent scum from entering the moving pipe 20.

The discharge pipe 10 is fixedly installed on the side wall of the reaction tank 1. The discharge pipe 10 passes through the side wall of the reaction vessel 1. One side of the discharge pipe 10 faces the inside of the reaction tank 1, and the other side of the discharge pipe 10 faces the outside of the reaction tank 1.

The discharge pipe 10 toward the inside of the reaction tank 1 is formed to be bent upward.

The fixing pipe 15 is coupled to the top of the discharge pipe 10. The fixing pipe 15 is installed long in the vertical direction.

The moving pipe 20 is inserted into the fixed pipe 15 and installed. The moving pipe 20 is installed long in the vertical direction. The lower part of the moving pipe 20 is inserted into the fixed pipe 15, and the upper part of the moving pipe 20 is exposed to the outside of the fixed pipe 15. The moving tube 20 is movable up and down by an actuator in a state where the lower part is inserted into the inside of the fixed tube 15 .

A sealing member 23 is installed on the upper part of the fixed pipe 15 to prevent leakage between the inner circumferential surface of the fixed pipe 15 and the outer circumferential surface of the moving pipe 20 . To this end, a fixing flange 17 is installed on the top of the fixing pipe 15. A support flange 21 is installed above the fixed flange 17 . The fixed flange 17 and the support flange 21 are coupled by bolts and nuts. A ring-shaped sealing member 23 is installed between the fixed flange 17 and the support flange 21 . The inner surface of the sealing member 23 is in close contact with the outer circumferential surface of the moving tube 20 .

The supernatant water flows into the moving pipe 20 through the upper part of the moving pipe 20 . The supernatant water introduced into the moving pipe 20 moves along the fixed pipe 15 and the discharge pipe 10 and is discharged to the outside of the reaction tank 1.

The actuator adjusts the height of the moving pipe 20 by moving the moving pipe 20 up and down. In the illustrated example, the motor 40 is applied as an actuator.

In order to apply the motor 40 as an actuator, a connecting bar 50, a housing 55, and a lead screw 60 are provided.

In the illustrated example, the connecting bar 50 is coupled to the wear part 80 . A joint unit for coupling the connecting bar 50 to the wear unit 80 is provided. The joint part is composed of a support plate 55 formed in a rectangular plate shape and coupled to the side plate 82 and a protrusion 57 formed on the upper portion of the support plate 55 and coupled to the connecting bar 50.

The connection bar 50 is coupled to the top of the protrusion 57 . The connection bar 50 is formed long in the vertical direction. The connecting bar 50 passes through the support follower 5 installed at the top of the reaction tank 1.

The housing 55 is mounted on top of the support follower 5. The housing 55 has a hollow cylindrical structure.

The leadscrew 60 is inserted into the housing 55. The lead screw has threads formed on the outer circumferential surface. The lower part of the lead screw 60 is coupled with the connecting bar 50.

The motor 40 is installed on the top of the housing 55 to rotate the lead screw 60 . A geared motor is used as the motor 40 . The top of the lead screw 60 passes through the gearbox of the motor 40. When the motor 40 operates, the lead screw 60 rotates and moves up and down. Accordingly, the moving pipe 20 coupled with the wear part 80 moves up and down to adjust the height.

Although not shown, a water level sensor installed in the reaction tank 1 to specify the water level of the reaction tank 1 to control the operation of the motor 40 and the operation of the motor 40 by the water level value measured from the water level sensor A control panel for controlling may be installed. Through this, the control panel can control the operation of the motor 40 based on the water level value output from the water level sensor.

The wear part 80 is installed on the moving pipe 20 and serves to prevent scum from entering the moving pipe 20 .

The shown wear part 80 includes a bottom panel 81 through which the moving pipe 20 passes, a side plate 82 formed on the front, rear, left and right edges of the bottom panel 81 and formed higher than the moving pipe 20, and a side plate ( 82) is provided with a supernatant water inlet 83 through which supernatant water flows in, and scum blocking means for blocking the inflow of scum floating on the water surface into the supernatant water inlet 83.

The bottom panel 81 is made of a rectangle. The upper part of the moving pipe 20 passes through the center of the bottom panel 81 .

The side plate 82 is formed at a certain height at the front, rear, left and right edges of the bottom panel 81 . The side plate 82 is formed higher than the moving tube 20 . That is, the upper end of the side plate 82 is located higher than the upper end of the moving tube 20 .

The supernatant water inlet 83 is formed on the side plate 82. In the illustrated example, supernatant water inlets 83 are formed on top of the side plates 82 located on both left and right sides of the bottom panel 81 . The supernatant water inlet 33 may be formed by cutting out the top of the side plate 82. Supernatant water may flow into the side plate 82 through the supernatant water inlet 83 .

When the lower part of the wear unit 80 is submerged in supernatant water and the supernatant water flows into the side plate 82 through the supernatant water inlet 83, a scum blocking means is provided to block the inflow of scum floating on the water surface.

The illustrated scum blocking means is composed of side plates 85 installed side by side on the outside of the side plates 82.

The side plate 85 is installed parallel to the side plate 82 outside the side plate 82 so as to be spaced apart from the side plate 82 in which the supernatant water inlet 83 is formed. The side plate 85 has an upper portion higher than the supernatant water inlet 83 and a lower portion lower than the supernatant water inlet 83 .

The side plate 85 and the side plate 82 are connected by a connection panel 87 so that the side plate 85 can be spaced apart from the side plate 82 . The connection panel 87 is located between the side plate and the side plate located on both sides of the front and rear of the bottom panel 81 . In addition, a plurality of reinforcing bars 88 connecting the pair of side plates 85 to each other are installed.

In a state where the reaction tank 1 maintains a constant water level, the motor 40 is operated to adjust the height of the moving tube 20 to discharge the supernatant water to the outside while the wear part 80 is positioned as shown in FIG. 4 . At this time, the supernatant water under the water surface is introduced between the side plate 85 and the side plate 82, passes through the supernatant water inlet 83, and moves to the inside of the side plate 82. Then, the supernatant water introduced into the upper part of the transfer pipe 20 is discharged to the outside.

As such, since the side plate 85 is located outside the supernatant water inlet 83, the scum 2 floating on the surface of the water can be prevented from flowing into the supernatant water inlet 83.

Meanwhile, FIG. 5 shows a state in which a cylinder 70 is applied as another example of an actuator.

Referring to FIG. 5 , the cylinder 70 is installed on the support follower 6 installed at the top of the reaction tank 1. A pneumatic or hydraulic cylinder may be used as the cylinder 70 . The rod 75 of the cylinder 70 is coupled to the protrusion 57 of the joint portion.

When the cylinder 70 operates, the wear part 80 connected to the rod 75 moves up and down, and the height of the moving tube 20 is adjusted. Although not shown, a water level sensor may be installed in the reaction tank 1 and a control panel for controlling the operation of the cylinder 70 based on the level value measured by the water level sensor may be installed.

A mechanical decanter for water treatment according to another example of the present invention is shown in FIGS. 6 to 8. The mechanical decanter for water treatment shown in FIGS. 6 to 8 has a joint part and a wear part configuration different from those of FIG. 1 and the rest is the same. Therefore, the structure of the joint part and the wear part will be described below.

Referring to FIGS. 6 to 8 , the joint part includes a disk-shaped support plate 53 and a fixing bracket 54 connecting the support plate 53 and the moving tube 20 . The connecting bar 50 is coupled to the top of the support plate 53.

In addition, the wear part 30 includes a bottom panel 31 through which the moving pipe 20 passes, a side plate 32 formed on the front, rear, left and right edges of the bottom panel 31 and higher than the moving pipe 20, and a side plate 32 ) and a supernatant water inlet 33 through which supernatant water flows in, and a scum blocking means for blocking the inflow of scum floating on the water surface into the supernatant water inlet 33.

The bottom panel 81 is made of a rectangle. The upper part of the moving pipe 20 passes through the center of the bottom panel 81 .

The side plates 82 are formed at a predetermined height on the front, rear, left, and right sides of the bottom panel 81 . The side plate 82 is formed higher than the moving tube 20 . That is, the upper end of the side plate 82 is located higher than the upper end of the moving tube 20 .

The supernatant water inlet 33 is formed on the side plate 32. In the illustrated example, supernatant water inlets 33 are formed on the side plates 31 located on both left and right sides of the bottom panel 31 . The supernatant water inlet 33 is formed in a rectangular shape. The supernatant water inlet 33 is formed in one or a plurality of two or more. Supernatant water may flow into the side plate 32 through the supernatant water inlet 33 .

When the lower part of the wear part 30 is submerged in supernatant water and the supernatant water flows into the side plate 32 through the supernatant water inlet 33, a scum blocking means is provided to block the inflow of scum floating on the water surface.

The shown scum blocking means blocks the supernatant water inlet 33 when the water level of the reaction tank 1 is located below the supernatant water inlet 33, and when the water level of the reaction tank 1 is located above the supernatant water inlet 33, the supernatant water inlet 33 A water level response opening/closing unit for opening the inlet 33 is provided.

The water level response opening/closing unit may selectively open and close the supernatant water inlet 33 .

The water level response opening/closing unit is a barricade 35 installed on the side plate 32 to block the supernatant water inlet 33, and when the water level of the reaction tank 1 is located above the supernatant water inlet 33, buoyancy is applied to the barricade 35. It is provided with an eccentric buoyancy unit 38 to provide.

Barricade 35 is made of a rectangular plate shape. The barricade 35 is formed larger than the supernatant water inlet 33.

The barricade 35 is installed on the side plate 32 so as to be movable up and down. To this end, a guide groove is provided on the side plate 32 to guide the vertical movement of the barricade 35. The guide groove is formed at the center of the left and right edges of the supernatant water inlet 33. The guide groove is formed vertically and long. Both left and right edges of the barricade 35 are inserted into the guide groove.

An insertion space 36 connected to the upper part of the supernatant water inlet 33 is formed inside the side plate 32. The upper part of the barricade 35 installed to block the supernatant water inlet 33 remains inserted into the insertion space 36. And when the barricade 35 rises by buoyancy, the upper part of the barricade 35 is inserted more deeply into the insertion space 36.

The insertion space 36 passes through the top of the side plate 32 . This is to easily install the barricade 35 at the supernatant water inlet 33. That is, the barricade 35 is inserted into the insertion space 36 through the upper part of the insertion space 36 and positioned as the supernatant water inlet 33. After placing the barricade 35 at the supernatant water inlet 33, the upper portion of the insertion space 36 is blocked with a sealing pad 34.

At the bottom of the supernatant water inlet 33, lower insertion grooves 37 connected to guide grooves on both left and right sides are provided with a predetermined depth. The lower part of the barricade 35 installed to block the supernatant water inlet 33 remains inserted into the lower insertion groove 37.

The eccentric buoyancy unit 38 is installed on the barricade 35. After installing the barricade 35 at the supernatant water inlet 33, it can be installed by coupling the eccentric buoyancy part 38 to the barricade 35.

The illustrated eccentric buoyancy portion 38 is formed by protruding outward from the barricade 35. A buoyancy space 39 is provided inside the eccentric buoyancy unit 38 . When the eccentric buoyancy part 38 is submerged in water, buoyancy is generated by the buoyancy space part 39.

The eccentric buoyancy unit 38 is located between the middle height and the upper end of the barricade 35. Therefore, the eccentric buoyancy part 38 is formed on the upper part of the barricade 35. In this way, since the eccentric buoyancy part 38 is formed biasedly on the upper part of the barricade 35, the barricade 35 can block or open the supernatant water inlet 33 according to the water level of the reaction tank 1.

When the height of the moving tube 20 is adjusted by operating the motor 40 while the water level in the reaction tank 1 is maintained at a constant level, the height of the water surface in the reaction tank is located below the supernatant water inlet 33 as shown in FIG. When the buoyancy part 38 is not submerged in the supernatant water, the barricade 35 blocks the supernatant water inlet 33. Therefore, the scum 2 floating on the water surface does not flow into the wear part 30 .

And, when the moving tube 20 descends further and the water level of the reaction tank is positioned above the supernatant water inlet 33 as shown in FIG. ) provides buoyancy. Accordingly, the lower part of the supernatant water inlet 33 is opened while the barricade 35 rises. Supernatant water flows into the wear part 30 through the lower part of the opened supernatant water inlet 33 and then flows through the upper end of the moving pipe 20 to flow into the moving pipe 20 .

In this way, since the supernatant water inlet 33 is opened only when the surface of the reaction tank is submerged to a certain depth or more, the scum 2 floating on the water surface can be effectively blocked from entering the wear part 30 . Accordingly, in the present invention, only the supernatant water without scum can be discharged to the outside of the reaction tank.

In addition, although the wear part shown in FIG. 1 is difficult to prevent the inflow of scum at the moment when it is just submerged in the supernatant water, the wear part shown in FIG. .

In the above, the present invention has been described with reference to one embodiment, but this is only exemplary, and those skilled in the art will understand that various modifications and equivalent embodiments are possible therefrom. Therefore, the true protection scope of the present invention should be defined only by the appended claims.

1: reaction tank 10: discharge pipe
15: fixed pipe 20: moving pipe
30: wear part 32: side plate
33: supernatant water inlet 35: bycade
38: eccentric buoyancy

Claims (5)

In the mechanical decanter for water treatment installed in the reaction tank of the water treatment device for purifying wastewater and discharging supernatant water to the outside,
a discharge pipe installed to pass through the sidewall of the reaction vessel;
a fixed pipe coupled to an upper portion of the discharge pipe;
a moving tube having a lower portion that is movable up and down in a state inserted into the fixed tube and through which supernatant water flows into the inside;
an actuator for adjusting the height of the moving pipe by moving the moving pipe up and down;
a connection bar coupled to a lower part of the lead screw which moves up and down while being rotated by the actuator;
a joint part composed of a disc-shaped support plate to which the connecting bar is coupled to an upper portion, and a fixing bracket connecting the support plate and the moving pipe;
A wear part installed in the moving pipe to prevent scum from entering the moving pipe,
The wear part has a bottom panel protruding through the center of the moving pipe, a side plate formed at the front, rear, left and right edges of the bottom panel and formed higher than the moving pipe and having an insertion space therein, and a square shape formed on the side plate to form an upper part Is connected to the insertion space and has a supernatant water inlet through which supernatant water flows in, and a scum blocking means for blocking the inflow of scum floating on the water surface through the supernatant water inlet,
The scum blocking unit comprises a water level response opening/closing unit for blocking the supernatant water inlet when the water level of the reaction tank is located below the supernatant water inlet and opening the supernatant water inlet when the water surface level of the reaction tank is located above the supernatant water inlet. equipped,
The water level response opening/closing unit is inserted into the insertion space and is installed on the side plate so as to be movable up and down, and is formed in a rectangular plate shape and is formed to be larger than the supernatant water inlet and blocks the supernatant water inlet. An eccentric buoyancy part formed on the upper part of the barricade so as to provide buoyancy to the barricade while being submerged in the supernatant water when located at the upper part of the supernatant water inlet,
The side plate is provided with a guide groove formed at the left and right edges of the upper water inlet into which the left and right edges of the barricade are inserted, and a lower insertion groove formed in the lower part of the upper water inlet and connected to the guide groove and into which the lower portion of the barricade is inserted. is provided,
The eccentric buoyancy part is formed by protruding outward of the barricade,
The eccentric buoyancy unit is located between the middle height and the top height of the barricade and is opened only when the supernatant water inlet is locked to a certain depth or more on the water surface. delete delete delete The method of claim 1, further comprising a water level sensor installed in the reaction tank to measure the water level of the reaction tank, and a control panel for controlling the operation of the actuator based on the water level value measured by the water level sensor. Mechanical decanter for water treatment.

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