KR20070022374A - Sedimentation tank in wastewater facility with screw type inclined plate - Google Patents

Abstract

The present invention relates to an electrostatic tank of a wastewater treatment apparatus for treating suspended water generated by mixing suspended matter such as earth and sand at a tunnel construction site, and more specifically, to a screw-type inclined plate of Patent No. 10-646042 developed by the applicant of this case. By improving the sedimentation tank of the sewage treatment plant, the residence time of the treated water introduced into the sedimentation tank is increased, and at the same time, it can be further stored or flowed at a low flow rate, thereby enabling high concentration flocculation treatment and improving treatment efficiency. It relates to the invention.

In the present invention, the cylindrical tubular body 121 is installed inside the settling tank 100 having a long length up and down, and the treated water supplied from the neutralization / reaction tank 20 is stored or stored at a low flow rate in the tubular body 121. The slanted plate 122 having a vertical light narrowing narrowed down to flow and at the same time is provided with a plurality of inclined plates 122 having a treatment water transport path 123 formed in the center at equal intervals up and down, and the inclined plate 122 A first treatment tank 120 in which a blocking plate 124 is installed at an upper portion of the position parallel to the treatment water transport path 123 of the first and second treatment tanks 120;

The sedimentation unit 111 in which the flocculates are separated from the treated water introduced through the first treatment tank 120 is located at the lower portion, and the flocculant flocculated from the treated water is precipitated in the precipitation unit 111. The condenser 112 has a float discharge pipe 114 and is formed at the bottom thereof, and allows the treated water in which the float is flocculated and separated in the precipitation unit 111 to be stored or flow at a low flow rate, and the flow of the treated water is constant. Screw-shaped inclined plate 115, the bent portion (115a) of the same width is formed continuously repeated so that it can be made over the inner surface of the precipitation portion 111 and the outer surface of the first treatment tank 120, , Achieved by a sedimentation tank of a wastewater facility having a screw-type inclined plate composed of a second treatment tank 110 having a discharge pipe 117 for sending the treated water purified from the sedimentation unit 111 to the filtration tank 40. What can be All.

Sedimentation tank, first treatment tank, screw type inclined plate, concentrating part, second treatment tank, pipe body, inclined plate, blocking plate, floating object prevention plate, treated water transport path

Description

Sedimentation of liquid waste treatment with screw type slant plant

1 is a process diagram of a wastewater facility for purifying treated water in which suspension is mixed;

Figure 2 is a partial cutaway perspective view illustrating a sedimentation tank according to the present invention.

Figure 3 is an exemplary cross-sectional view of the sedimentation tank according to the present invention.

Figure 4 is a cross-sectional view of another embodiment of the sedimentation tank according to the present invention.

<Explanation of symbols for main parts of drawing>

100: sedimentation tank 110: second treatment tank

111: sedimentation unit 112: concentration unit

114: float discharge pipe 115: screw-type inclined plate

115a,: Bend section 116: Floating injury prevention plate

117: discharge pipe 120: first treatment tank

121: tube 122: inclined plate

123: treated water transport path 124: blocking plate

The present invention relates to an electrostatic tank of a wastewater treatment apparatus for treating suspended water generated by mixing suspended matter such as earth and sand at a tunnel construction site, and more specifically, to a screw-type inclined plate of Patent No. 10-646042 developed by the applicant of this case. By improving the sedimentation tank of the sewage treatment plant, the residence time of the treated water introduced into the sedimentation tank is increased, and at the same time, it can be further stored or flowed at a low flow rate, thereby enabling high concentration flocculation treatment and improving treatment efficiency. It relates to the invention.

In general, at the construction site, that is, the tunnel construction site, water such as dry water and groundwater is generated inside the tunnel under construction during the excavation of the tunnel.

As described above, the water generated at the tunnel construction site is infiltrated by turbidity generated during excavation.

When discharged into the river without purifying the water issued by the incorporation of the soil as described above, the soil is deposited on the bottom of the river in the water to reduce the production and activity of microorganisms, leading to deterioration of the water quality of the river water, as well as the suspended soil It not only prevents the gills of fish and prevents them from growing, but even transforms them into dead rivers, where it is impossible to grow them.

In order to prevent the above problems, suspended water (hereinafter referred to as "treated water") generated at the tunnel construction site is discharged through a purification process, and a method of purifying the treated water includes suspended solids such as earth and sand mixed in water. The sedimentation wastewater facility which uses the sedimentation to purify the treated water is used.

The wastewater facility that precipitates the suspended matter in the treated water in which the suspended matter is mixed by sedimentation method sediments and separates the suspended matter in the treated water generated from the tunnel construction site, sterilizes the harmful substances in the treated water, and then filters the filtered water. Discharged clear water.

The process of purifying the treated water generated at the tunnel construction site using the wastewater facility as described above will be described in detail with reference to FIG. 1.

The treated water generated in the tunnel construction site is introduced into the settlement 11 of the sedimentation tank 10 so that large particles of suspended matter such as stones are sedimented and separated.

The treated water from which the large particles of suspended matter are separated from the settling basin 11 of the immersion tank 10 is introduced into the sump tank 12, and the treated water introduced into the sump tank 12 is provided by the metering pump 13. It is pumped and supplied to the neutralization / reactor 20.

At this time, the float having a low specific gravity is sent to the concentration tank 30 to be processed.

The treated water supplied to the neutralization / reaction tank 20 is stirred by the rotation of the stirring shaft 22 rotating by the electric motor 21 with the stirring blade 23, and the treated water stirred as described above The bacterial harmful substances contained in the treated water are mixed with the sulfuric acid supplied from the medicine container 60 to be sterilized.

In addition, the suspended solids in the treated water are first agglomerated while being mixed with the alumina sulfate supplied from the medicine container 70.

As described above, the first flocculated floc is settled down and collected through a sludge pump (not shown in the drawing).

In the neutralization / reactor 20, the suspended solids are first agglomerated and the purified water is supplied to the settling tank through the transfer pipe 90 connected to the neutralization / reactor 20.

When the treated water purified in the neutralization / reaction tank 20 is transported along the transfer pipe 90, the polymer coagulant is introduced into the transfer pipe 90 from the chemical container 80 so that it is not aggregated in the neutralization / reaction tank 20. Fine suspended matter in the treated water will be secondary agglomerated.

The treated water in which fine suspended solids are agglomerated by the polymer coagulant is controlled by a baffle plate provided in a zigzag pattern in the transfer pipe 90 so that the treated water is transferred at a slow speed.

The treated water transferred along the transfer pipe 90 is introduced into the settling tank having the inclined plate.

 In the settling tank into which the treated water is introduced through the transfer pipe 90, the chemicals are injected from the aforementioned medicine containers 60, 70, and 80.

The treated water introduced into the settling tank is retained by the inclined plate or flows at a low flow rate so that the flocculation of the remaining suspended matter in the suspended water is activated. Will be.

The clear water, which is suspended and purified, is suspended and then discharged through the discharge tank 50 after being finally treated in the filtration tank 40.

On the other hand, the sediment is sedimented sediment is separated from the sedimentation tank sediment is accumulated and suspended in a drying table (not shown in the figure) through the float discharge pipe is dried and then processed.

As described above, the purification efficiency may vary depending on the function of the sedimentation tank which finally purifies the treated water in the wastewater facility for treating the treated water including the suspension generated at the tunnel construction site.

The sedimentation tanks currently used in wastewater facilities have been developed in various forms.

Among them, the sedimentation tank having high purification efficiency of treated water can be exemplified by Patent No. 10-646042 filed by the applicant of this case.

In the settling tank of the pre-registered invention, the first treatment tank having a screw-type inclined plate installed in the settling section for storing the treated water supplied from the neutralization / reaction tank or flowing at a low flow rate is formed outside;

The second treatment tank is formed by a tube which is in communication with the first treatment tank in the inner center of the first treatment tank, and the upper and lower narrowing forms narrowing as it goes from top to bottom in the pipe, and at the same time, the treatment water transport path Is formed of a plurality of float blocking plates formed at equal intervals, and is composed of a second treatment tank in which a fine flotation flotation blocking plate is installed in parallel with the treated water transport path of the float blocking plate.

The pre-registered invention configured as described above is superior in the treatment efficiency of the treated water compared to the existing sedimentation tank, but because the sedimentation tank is rectangular, the stepped bent portion is formed to have a uniform width so that the treated water can be further stored or flowed at a low flow rate. It has a disadvantage in that the bent portion of the wide width is formed in the corner portion, and the bend of too wide width is formed to become a factor that hinders the smooth flow of the treated water, the first treatment in which the treated water flows Compared to the tank, the cross-sectional area of the second treatment tank in which the treated water is precipitated with fine flotation is small, but a small amount in the process of discharging the treated water through the first chorizo, but has a disadvantage in that the fine float is discharged together.

Therefore, the applicant of this case came to develop the sedimentation tank which improved and complemented the sedimentation tank of the pre-registered invention.

The present invention was developed in order to solve the drawbacks of the settling tank of the pre-registered invention, to improve the settling tank in a cylindrical shape so that the bent portion has the same width in the screw-type inclined plate and at the same time to the inner center of the settling tank by the tubular body The treatment water is introduced through the formed first treatment tank so that the cross-sectional area is doubled and discharged through the second treatment tank in which a screw-shaped inclined plate having a bent portion having the same width is continuously repeated is finally purified. By increasing the time that the treated water is stored in the sedimentation tank or flowing at a low flow rate, the neutralization / reaction of the suspended solids is not only increased, but also the purification efficiency is higher than that of the same volume of the sedimentation tank. Wastewater facility with screw type inclined plate that doubles the purification process of turbid turbid water It has the settling tank to provide.

Another object of the present invention is to further install a floating float prevention plate in the settling portion of the second treatment tank so as to be located in the lower side parallel to the first treatment tank to prevent the floatation of the float in the enrichment section by the treated water flowing from the first treatment tank. The present invention provides a sedimentation tank of a wastewater facility having a screw-type inclined plate to be blocked at source.

The present invention for achieving the above object is provided with a cylindrical tube 121 in the interior of the settling tank 100 having a long length, up and down, in the tube body 121 is supplied from the neutralization / reaction tank 20 The slanted plate 122, which has a treatment water transport path 123 formed in the center, is installed in a plurality of spaces at the same time. A first treatment tank 120 in which a blocking plate 124 is provided at an upper portion of the inclined plate 122 in parallel with the treatment water transport path 123;

The sedimentation unit 111 in which the flocculates are separated from the treated water introduced through the first treatment tank 120 is located at the lower portion, and the flocculant flocculated from the treated water is precipitated in the precipitation unit 111. The condenser 112 has a float discharge pipe 114 and is formed at the bottom thereof, and allows the treated water in which the float is flocculated and separated in the precipitation unit 111 to be stored or flow at a low flow rate, and the flow of the treated water is constant. Screw-shaped inclined plate 115, the bent portion (115a) of the same width is formed continuously and repeatedly so as to be made is provided over the inner surface of the sedimentation portion 111 and the outer surface of the first treatment tank 120, Sedimentation tank of a wastewater facility having a screw-type inclined plate, characterized in that the discharge pipe 117 for sending the treated water purified from the precipitation unit 111 to the filtration tank 40 is composed of a second treatment tank 110 is installed thereon. By month That would be.

The present invention is further installed in the sedimentation part 111 of the second treatment tank 110 to prevent the flotation flotation plate 116 to be prevented from flocculation of the suspended matter suspended in the flocculation unit 112 by flocculation. What can be achieved by the sedimentation tank of the wastewater facility having a screw-type inclined plate.

Hereinafter, described in detail by the accompanying drawings a preferred embodiment for achieving the above object is as follows.

As shown in Figs. 2 to 4, the sedimentation tank 100 of the wastewater facility having the screw-type inclined plate according to the present invention is composed of a first treatment tank 120 and a second treatment tank 110 in a vertical direction. .

The first treatment tank 120 is provided with a tube body 121 in the inner center.

The tubular body 121 has a lower portion open to allow the inflow of treated water into the settling portion 111 of the second treatment tank 110.

In the upper portion of the tubular body 121, the inclined plate 122 is formed at equal intervals up and down to allow the treated water supplied from the neutralization / reaction tank 20 to flow at a low flow rate or to block floating materials.

The inclined plate 122 forms a funnel forming the upper and lower narrowing forms, and at the same time, a treatment water transport path 123 is formed to allow the treated water to be discharged from the first treatment tank 120 to the center.

On the upper portion of each of the inclined plate 122, a blocking plate 124 for blocking the fine floating material is installed so as to be parallel to the treated water transfer path (123).

The second treatment tank 110 is formed to have a long length up and down, the lower portion of the funnel-shaped enrichment portion 112 so that the floating in the treated water introduced into the settling portion 111 can be settled Formed.

The condensation part 112 is provided with a float discharge pipe 114 so that the accumulated float can be sucked and discharged by a suction pump (not shown).

In the upper portion of the settling portion 111 is treated in the first treatment tank 120, the screw-shaped inclined plate 115 to allow the treated water in which the flocculant is separated from the settling portion 111 to flow or flow at a low flow rate It is installed.

The screw-shaped inclined plate 115 is formed in a screw shape by fixing both side ends to the outer surface of the tube body 121 of the first treatment tank 120 and the inner surface of the second treatment tank 110.

The screw-shaped inclined plate 115 is formed with a stepped bent portion 115a to allow the treated water to be further stored or flow at a low flow rate.

An upper portion of the second treatment tank 110 is provided with a discharge pipe 117 through which the treated water, which is stored by the screw type inclined plate 115 or discharged at a low flow rate, is sent to the filtration tank 40.

In the precipitation part 111, there is further provided a float injury prevention plate 116 which can block floating of sediment which is flocculated by sedimentation and concentration in the concentration part 112.

The process of purifying the treated water in which suspended matter such as earth and sand is mixed through the sedimentation tank 100 of the wastewater facility having the screw-type inclined plate of the present invention configured as described above is as follows.

In describing the process of purifying the suspended matter in the treated water by the sedimentation tank 100 of the present invention for each process, the same technique as in the prior art will be denoted by the same reference numeral and the treated water in the pretreatment process of the sedimentation tank 100. The purifying process has been described in the foregoing, so it will be omitted in the present invention.

First, sulfuric acid in the medicine container 60 and alumina sulfate in the medicine container 70 are supplied to the first treatment tank 120 constituting the settling tank 100 to sterilize bacterial harmful substances contained in the treated water. At the same time, the polymer coagulant is introduced from the medicine container 80, and the treated water in which the suspended matter is aggregated is supplied from the neutralization / reaction tank 20.

As described above, the treated water introduced into the first treatment tank 120 is stored by the inclined plate 122 and the blocking plate 124 or flows at a low flow rate. Even suspended solids are aggregated.

As described above, the treated water that is stored along the inclined plate 122 or flows at a low flow rate has a long settling distance, and a reaction / agglomeration time increases, thereby increasing flocculation efficiency of the suspended matter.

In addition, when the treated water passes through the inclined plate 122 and the blocking plate 124, vortices are generated, and the agitation occurs, and the polymer coagulant supplied from the chemical container 80 is evenly mixed with the suspended matter in the treated water to activate the aggregation.

As described above, the flocculation of the suspended solids is activated by the polymer coagulant, thereby allowing the separation of the suspended solids.

The treated water having the suspended solids (sludge) having a specific gravity aggregated in the first treatment tank 120 is introduced into the settling portion 111 of the second treatment tank 110, and flows into the settling portion 111. The suspended matter of the treated water is settled in the lower portion 112 by its specific gravity.

The suspended matter that is sedimented by the thickening part 112 is positioned below the float injury prevention plate 116, and the sediment settled by the float emergency prevention plate 116 does not float and remains stable. It will be done.

As described above, the treated water from which the floating material having a large specific gravity is separated is lifted upward.

As described above, the treated water introduced into the second treatment tank 110 may support the flocculation / reaction tank in which the discharge pipe 117 of the second treatment tank 110 introduces the treated water into the first treatment tank 120 ( Because it is located lower than 20), it is possible to move the float

The treated water supported as described above is stored by the screw type inclined plate 115 or flows at a low flow rate.

The screw-shaped inclined plate 115 for storing the treated water or flowing at a low flow rate has a bent portion 115a that is bent and formed in a step shape, so that the treated water passes along with the treated water while passing through the second treatment tank 110. It will effectively block and settle the suspended fine suspension.

On the other hand, the sedimentation tank 100 of the case application is more than double the cross-sectional area of the second treatment tank 110 compared to the cross-sectional area of the first treatment tank 120, so that the flow of the treated water is further stored. In addition to improving the flocculation efficiency of the suspended solids, each sulfuric acid, alumina sulfate, and a polymer coagulant (not shown in the drawing) are introduced into the medicine containers 60, 70, and 80.

As the drug is administered to the second treatment tank 110 as described above, the separation and flocculation and sedimentation of very small fine suspended solids that have not been treated in the pretreatment process are completely made.

The clear water in which the suspended matter is completely processed while passing through the second treatment tank 110 is discharged to the filtration tank 40 through the discharge pipe 117.

Clear water introduced into the filtration tank 40 is discharged through the discharge tank 50 through the final filtration process in the filtration tank 40, the bottom of the sedimentation part 111 of the second treatment tank 110, which was separated and settled The suspended matter accumulated in the condensation unit 112 is transferred to a drying table (not shown in the drawing) through the suspended matter discharge pipe 114, and then dried and processed.

As described above, in the sedimentation tank of the wastewater installation having the screw-type inclined plate of the present invention, the bent portion 115a may be formed in the screw-type inclined plate 115 constituting the second treatment tank 110 with the same width. Improving the settling tank 100 into a cylindrical shape so as to introduce the treated water through the first treatment tank 120 formed in the inner center of the settling tank 100 by the tubular body 121 so that the cross-sectional area is broad and the same. As the bent portion 115a of the width is discharged through the second treatment tank 110 in which the screw type inclined plate 115 is continuously repeated, the treated water finally purified is stored in the settling tank 100 or By increasing the flow time at low flow rate and neutralizing / reacting the suspended solids, it not only increased the purification efficiency more than the sedimentation tank 100 of the same volume, but also caused excessive mixing of suspended solids such as earth and sand, resulting in dark turbidity. It has the advantage that double the purifying ability of risu.

In addition, the floating material preventive plate 116 is further installed in the settling portion 111 of the second processing tank 110 so as to be located at the lower side parallel to the first processing tank 120, and thus, from the first processing tank 120. It has an advantage to prevent the floating of the float in the concentration unit 112 by the inflowing water at the source.

Claims (2)

In the sedimentation tank (100) of the wastewater facility consisting of the first treatment and the second treatment tank in the upstream and downstream manner. The cylindrical tubular body 121 is installed in the settling tank 100 having a long length up and down, but the treated water supplied from the neutralization / reaction tank 20 is stored in the tubular body 121 so as to flow or flow at a low flow rate. A plurality of inclined plate 122 is formed at the same time as the upper and lower intervals to be narrowed down and the treatment water transport path 123 is formed in the center at equal intervals up and down, the treated water of the inclined plate 122 A first treatment tank 120 in which a blocking plate 124 is installed at an upper portion of the position parallel to the transfer path 123; The sedimentation unit 111 in which the flocculates are separated from the treated water introduced through the first treatment tank 120 is located at the lower portion, and the flocculant flocculated from the treated water is precipitated in the precipitation unit 111. The condenser 112 has a float discharge pipe 114 and is formed at the bottom thereof, and allows the treated water in which the float is flocculated and separated in the precipitation unit 111 to be stored or flow at a low flow rate, and the flow of the treated water is constant. Screw-shaped inclined plate 115, the bent portion (115a) of the same width is formed continuously and repeatedly so as to be made is provided over the inner surface of the sedimentation portion 111 and the outer surface of the first treatment tank 120, Sedimentation tank of a wastewater facility having a screw-type inclined plate, characterized in that the discharge pipe 117 for sending the treated water purified from the precipitation unit 111 to the filtration tank 40 is composed of a second treatment tank 110 is installed thereon. . According to claim 1, Floating float prevention plate 116 is further installed in the settling portion 111 of the second treatment tank 110 to prevent the flotation of flocculation flocculate sedimentation settled in the concentration section 112 to rise. Sedimentation tank of a wastewater facility having a screw-type inclined plate, characterized in that it allows.

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