KR20060091787A - Flocculation and sedimentation combined system for water treatment - Google Patents

Abstract

The present invention relates to an integrated flocculation and sedimentation system for a water treatment plant, and more particularly, to a mixed paper in which a flocculant is administered and mixed with the introduced raw water, and a fixed mixer to facilitate the formation of flocs. In the flocculation and sedimentation system for a water treatment plant comprising a flocculation paper mixed at a speed, and a floc formed to a predetermined size in the reaction water introduced from the flocculation paper is precipitated to the bottom by gravity and discharges only the supernatant to the outside. The inside of the flocculation paper is flocculated paper so that the flocculation paper is separated from the left and right sides while forming a predetermined flow path between the bottom surface of the flocculation paper by a buoyancy force of the reaction water filled inside the flocculation paper and forming a predetermined flow path between the bottom face of the flocculation paper. And a sedimentation basin having an inner space portion separate from the one side of the sedimentation basin Overflow inlet is formed to move to the second agglomeration site and stirred reaction water flows, the reaction water flowing into the inner bottom of the sedimentation basin through the overflow inlet is moved to the top, the floc and sludge sinks to the bottom by gravity and only the supernatant water outside The present invention relates to an integrated flocculation and sedimentation system for a water treatment plant, which is provided with a discharge trap on top of the sedimentation basin.

Integrated flocculation and sedimentation system, sedimentation basin, flocculation basin, upflow type

Description

Flocculation and sedimentation combined system for water treatment

1 is a state of installation of flocculation paper and sedimentation basin used in the conventional water treatment process,

Figure 2 is a schematic configuration cross-sectional view for explaining the water treatment process for the integrated aggregation and sedimentation system according to the present invention,

3 is a configuration diagram of an integrated aggregation and precipitation system for explaining the present invention in more detail,

Figure 4 is a state diagram moved the position of the sedimentation basin to adjust the stirring strength using the system according to the invention,

5 is a plan view of an integrated aggregation and precipitation system according to the present invention.

※ Brief description of symbols for the main parts of the drawings

10: mixed paper 20: aggregated paper

21, 22: first and second converging place 25: mixing

26: Euro 30: sedimentation basin

35 discharge trap 37: sludge collection unit

40: overflow inlet 50: moving means

52: towing means 54: rotational movement means

60: discharge induction pipe

The present invention relates to an integrated flocculation and sedimentation system for water treatment facilities, and more particularly, an upflow sedimentation basin is provided in the flocculation basin to solve the problem of density flow as well as the efficient use of the purification basin. The present invention relates to an integrated coagulation and sedimentation system system for a water treatment plant, in which agglomerates and sedimentation basins configured to change agglomeration basin volumes at both ends to easily control agitation strength are integrally combined.

The flocculation and sedimentation system of the water treatment plant that is commonly used is composed of a three-stage agglomeration basin (2) (3) (4) and a horizontal flow long-term sedimentation basin (5) is installed, The flocculation and sedimentation system of the conventional water treatment system having such a structure has a rapid mixing process in the mixed paper (1) in which the introduced raw water is administered with the coagulant, and the raw water mixed with the coagulant has a plurality of stages of coagulated paper (2). (3) (4), causing flocculation reaction with foreign substances in the water to form flocs, and then flow into horizontally formed sedimentation basin (5) and move horizontally, and the flocs and sludges sink to the bottom of the sedimentation basin It consists of a configuration that is discharged only through the discharge trap (6).

Such a flocculation and sedimentation system of the conventional horizontal flow type rectangular water treatment plant is impossible to change the structure and volume of each stage of the flocculation basin, so that the admixture (7) of each flocculation basin (2) (3) (4) is installed. In order to adjust the agitation strength (G value), the rotation speed of the admixture (or stirrer) on the horizontal axis (or vertical axis) should be adjusted, but the admixture (7) is caused by the resistance and water pressure of the fluid filled inside the bulky flocculation paper. It is difficult to adjust the stirring strength of the difficulty of adjusting the number of times, and the mechanical failure often occurred due to excessive operation for the adjustment thereof. In addition, the rectangular sedimentation basin 5 usually has a width of about 20M and a length of 50M or more. There was a difficulty in securing the site due to the need for a site, and maintenance and management of such a water treatment facility also had a disadvantage of requiring a large number of people and energy.

In addition, in the case of using the conventional rectangular horizontal flow flocculation and sedimentation system, the temperature of the raw water surface increases due to the temperature increase from June to September due to the climatic conditions of Korea, and the surface near the inner surface becomes cold and the floor is cold. There was no preventive measure when the floc precipitated on the surface of the flocculents was raised to the surface of the sediment, which caused the deterioration of water quality. In winter, there was a problem that the ice was formed in the upper part of the sedimentation basin, which adversely affects the sedimentation efficiency.

The present invention has been made to solve the problems of the conventional flocculation and sedimentation system of the conventional water treatment plant, the present invention is to enable efficient site use of the water treatment plant that requires a large site, and The purpose of the present invention is to provide an integrated flocculation and sedimentation system for water treatment facilities to maximize the floc formation by easily controlling the agitation strength of the flocculators installed in the water treatment facilities according to the raw water.

In particular, the present invention by installing the sedimentation basin inside the flocculation basin, by simply moving the location of the sedimentation basin to reduce the manpower and energy by simple volume control of the flocculation basin, and to prevent the occurrence of malfunction of the apparatus due to excessive operation prevention, Another object is to provide an integrated flocculation and sedimentation system for water treatment plants that can be improved.

In order to achieve the above object, the integrated flocculation and sedimentation system for a water treatment plant according to the present invention is a mixed paper that is mixed with a coagulant is injected into the incoming raw water, and to facilitate the formation of flocs and sludge in the inflow water from the mixed paper. Water treatment consisting of flocculation paper to be mixed at a constant speed by the admixture, and flocculation and sludge formed to a predetermined size in the reaction water introduced from the flocculation paper is precipitated to the bottom by gravity and discharged only the supernatant to the outside In the flocculation and sedimentation system for a facility, the flotation paper floats a certain height from the bottom surface of the flocculation paper by buoyancy of the reaction water filled inside the flocculation paper to form a predetermined flow path between the bottom face and the inside of the flocculation paper. Upstream sedimentation basin is formed to form a space portion separated from the one side of the sedimentation basin In the flow through the flow formed on the bottom of the sedimentation basin inlet flows from the first condensate to the second condensate is formed inlet flow inflow, the reaction water flowing into the inner bottom of the sedimentation basin through the overflow flow inlet is moved upwards While the floc and sludge sinks to the bottom by gravity and provides an integrated flocculation and sedimentation system for the water treatment plant consisting of a discharge trap on the top of the sedimentation basin so that only the supernatant is discharged to the outside.

In particular, the upflow type sedimentation basin is moved to the left and right in the state of floating by the reaction water filled in the flocculation basin is provided with a moving means of the sedimentation basin between both ends of the sedimentation basin and the upper surface of the flocculation basin respectively It has a characteristic structure.

Hereinafter, with reference to the accompanying drawings in the specification will be described in detail the present invention.

Figure 2 is a schematic configuration cross-sectional view for explaining the water treatment process for the integral aggregation and precipitation system according to the present invention, Figure 3 is a configuration diagram of the integral aggregation and precipitation system according to the present invention.

As shown in the figure, the integrated flocculation and sedimentation system for a water treatment plant according to the present invention is a mixed paper 10 for performing a mixing process for forming a microfloc by administering a flocculant to the incoming raw water, and the mixed paper ( 10 and a plurality of stages of agglomeration paper 20 performing slow agitation by the admixture 25 so as to collide with the microflocs included in the inflow water introduced in 10 to form a larger floc, and the agglomeration paper 20 The floc formed to a predetermined size in the) flows over the floc and sludge is settled at the bottom by gravity, the sedimentation basin is installed floating in the flocculation paper 20 so that only the supernatant is discharged through the discharge trap 35 installed on the upper It consists of 30.

That is, the feature of the present invention is configured so that the sedimentation basin 30 is installed inside the agglomeration basin 20 so that spaces separated from each other are formed, and the agglomeration basin 20 is formed by the sedimentation basin 30. 10, a predetermined flow path formed at a lower end of the settling basin 30, wherein the first flocculation paper 21 into which the reaction water introduced from the first agitation is first stirred, and the reaction water in which the fine floc is formed by slow stirring in the first agglomeration paper 21 ( 26 is formed into a structure divided into a second agglomeration paper 22 configured to be stirred to a somewhat lower strength than the first agglomeration paper 21.

In this way, the sedimentation basin 30 is provided inside the flocculation basin 20 so that the flocculation basin 20 is divided into a first flocculation basin 21 and a second flocculation basin 22 on the left and a right, and a mixed basin ( After the reaction water introduced from 10) is stirred in the first aggregator 21 by the primary admixture 25 to form a fine floc, the second agglomerate is passed through the flow path 26 formed at the bottom of the sedimentation basin 30. After the fine floc is formed into a larger floc in the second flocculation paper 22 which is moved to the 22 and is stirred by the mixer 25 which rotates at a lower speed than the first flocculation paper 21, It is configured to be overflowed into the interior of 30).

The sedimentation basin 30 is made upflow type that can be moved to the upper side after the flow of the reaction water flowed in from the second agglomerate 22 flows into the inner lower end, and the reaction water of the second agglomerate 22 is overflowed. Overflow inlet 40 is formed on one side of the sedimentation basin to guide the flow into the inner bottom of the sedimentation basin 30, and the reaction water introduced into the inner bottom of the sedimentation basin 30 moves to the upper part of the sedimentation basin 30. As the movement speed is gradually slowed down, the sedimentation basin gradually increases its cross-sectional area (width) from the bottom to the top so that the flocs and sludges in the reaction water naturally sink to the bottom of the sedimentation basin by gravity. It consists of.

In particular, the settling basin 30 according to the present invention described above is maintained in the flotation of the flocculation paper 20 by the buoyancy of the reaction water filled in the flocculation paper 20, the flotation paper 30 is It is configured to move left and right by a separate moving means 50 provided so as to change the volume of the first aggregated paper 21 on one side and the second aggregated paper 22 on the other side. The moving unit 50 is installed between both sides (or front and rear) of the sedimentation basin 30 and both sides of the upper surface of the agglomeration basin 21 and 22 at each stage so as to allow horizontal movement of the sedimentation basin 30 ( It is preferable that 52 and the rotation movement means 54 are combined, and the sedimentation basin 30 is moved to one side by the movement means 50 so that the first aggregation paper 21 and the second aggregation paper 22 on both sides are moved. The state in which the volume (volume) change of) is made is shown in FIG. 4.

Further, when the sedimentation basin 30 is moved by the moving means 50, the discharge of the supernatant water introduced into the discharge trap 35 provided on the upper part of the sedimentation basin 30 despite the left and right movement of the sedimentation basin 30. A discharge induction pipe 60 is provided for discharging the purified water to one side or both sides of the sedimentation basin 30 having the outlet of the discharge trap 35 so that the discharge can be smoothly discharged. Traction means 52 is made of a wire 55 or a chain installed on both sides of the sedimentation basin 30, the rotational movement means 54 is the upper side of the upper surface and the upper end of the sedimentation basin (20) It is composed of a rotating roller and a moving rail 56, etc. installed at the rear side so that the operator can pull the sedimentation basin to the side of the coagulation basin at each stage by manual or mechanical power by a motor. Shown in the top view, the movement number The specific description contents of the 50 present invention, so the implementation is available in various forms, using conventional techniques, detailed description thereof will be omitted.

On the other hand, it will be described below the operation and effect of the integrated coagulation and sedimentation system for a water treatment plant according to the present invention having the configuration described above.

First, the biggest characteristic action of the integrated aggregation and precipitation system according to the present invention is that the sedimentation basin 30, which requires a large-scale site, is integrally included in the interior of the flocculation basin 20 so as to provide a water treatment facility. By being able to configure, it is possible to minimize the site required for the water treatment facility, thereby reducing construction costs and construction deadlines. It is easy to select a site for the water treatment facility, and there are many differences in the quality of raw water introduced monthly or seasonally. When the stirring strength of the flocculation paper 20 is to be adjusted, in the conventional case, the volume (volume) of the flocculation paper 20 is always fixed constantly, so it is very difficult to control the stirring strength of the admixture. In many cases, the failure of machinery during excessive operation occurred, but in the case of the integrated coagulation and sedimentation system according to the present invention, the coagulation paper 21 and 22 divided into each stage are provided. The volume of can be changed to the left and right movement of the sedimentation basin 30 to facilitate the adjustment of the stirring strength value applied to the admixture of the flocculation basin 20.

That is, the stirring strength (G) of the normalized mixer can be represented by the following formula [1].

Where P = rotational energy of the mixer

        μ = viscosity of the fluid

         V = aggregate volume (volume)

In the formula [1], the factors that can control the stirring strength (G) are the rotational energy (P) of the admixture and the volume (V) of the flocculating paper. In the conventional case, the volume (V) of the flocculating paper is made of invariant deformation. In order to change the stirring strength (G), the rotational energy (P) of the mixer was inevitably increased or decreased, but it was very difficult to increase or decrease the rotational energy (P) of the mixer by the hydraulic pressure or frictional force of the fluid. In many cases, a failure of the equipment occurs at the time of change, and when a failure of the equipment occurs, a lot of maintenance work time, labor, cost, and power are lost due to the replacement of the equipment. It acted as a factor to reduce.

However, in the present invention, in the formula [1], the volume (V) of the flocculation paper 30 is changed to the movement of the settling paper 30 instead of changing the stirring strength G by changing the rotational energy P as in the prior art. By simply changing the stirring strength (G) can be easily adjusted, so that no damage to equipment or a factor that reduces the treatment efficiency of the water does not occur, so that the efficiency of the work can be achieved, and in the case of the sedimentation basin, flocculation due to buoyancy Injury in the area has the advantage that can be easily moved without having to move too much force.

In addition, the sedimentation basin according to the present invention consists of a flow upflow type and flocs and sludge formed in a predetermined size is gradually moved to the upper part of the sedimentation basin after the flow into the lower part of the sedimentation basin, the flow rate decreases due to the increase in the cross-sectional area inside the sedimentation basin sediment due to gravity This naturally made does not require a separate device or device, and the flocs settled to the bottom of the sedimentation basin is collected in the sludge collection unit 37 is periodically discharged to the outside.

In addition, by adopting an upflow sedimentation basin, the water temperature inside the sedimentation basin is reduced to prevent the occurrence of dense flow that can occur between June and September in Korea, and to prevent water deterioration. It is prevented from occurring, so that no adverse effect on sedimentation efficiency is caused.

As described above, the integrated coagulation and sedimentation system for water treatment facilities according to the present invention is capable of efficient use of the site, and the sedimentation basin is composed of an upflow type and has a structure in which the cross-sectional width gradually increases from the bottom to the upper end and flows into the bottom of the sedimentation tank. By slowing down the speed of the reaction water moving to the upper part, it is possible to settle floc smoothly, and by changing the volume of the flocculation basin to change the volume of the flocculation basin, it is possible to easily control the agitation intensity, to prevent the occurrence of density flow in the summer season and the freezing of the winter season. It prevents the phenomena so that the four seasons can be managed efficiently.

Claims (4)

In the mixed paper where the coagulant is injected and mixed with the introduced raw water, the coagulated paper which mixes the inflow water introduced from the mixed paper at a constant speed by the mixer to facilitate the formation of flocs and sludge, and the reaction water introduced from the coagulated paper. In the floc and sludge formed to a predetermined size in the flocculation and sedimentation system for water treatment facilities comprising a sedimentation basin is settled in the sludge collector of the bottom by gravity and discharge only the supernatant to the outside, Inside the flocculation paper, flocculation paper and the flocculation paper are lifted to a certain height from the bottom surface of the flocculation paper by buoyancy of the reaction water filled inside the flocculation paper to form a predetermined flow path between the bottom face and the flocculation paper to the left and right sides. An upflow sedimentation basin having a separate space is installed, and one side of the sedimentation basin is moved from a first agglomeration basin formed at one side of the sedimentation basin to a second agglomeration basin formed at the other side through a flow path formed at the bottom of the sedimentation basin, where the stirred reaction water is introduced. Overflow inlet is formed, and the reaction water flowing into the inner bottom of the sedimentation basin through the overflow inlet is moved to the upper side so that flocs and sludge sink to the bottom by gravity and discharge traps are provided at the top of the sedimentation basin so that only the supernatant is discharged to the outside. Integral coagulation and sedimentation system for water treatment facilities, characterized in that made. The method of claim 1, The upflow type sedimentation basin and the both ends of the sedimentation basin so as to easily adjust the stirring strength of the admixtures provided in each flocculation basin by changing the volume of the flocculation basin at both ends in the state of floating by the reaction water filled inside the flocculation basin An integrated coagulation and sedimentation system for water treatment facilities, characterized in that the sedimentation basin movement means is provided between the upper surface of both sides of the flocculation paper. The method according to claim 1 or 2, The sedimentation basin is composed of a normal light narrowing structure in which the cross-sectional width gradually increases from the lower end to the upper end to facilitate the precipitation of floc and sludge due to gravity as the reaction water introduced to the bottom is gradually moved upward, and one side of the sedimentation basin Or both sides of the integrated flocculation and sedimentation system for a water treatment facility characterized in that the discharge induction pipe is further provided to enable the smooth discharge of the supernatant even when the left and right positions of the sedimentation basin moves. The method of claim 2, The movement means of the sedimentation basin is composed of a traction means for automatically or manually moving the sedimentation basin to one side of the flocculation basin by the operator's operation, and the rotating means for smooth movement of the sedimentation basin is provided at both ends before and after the sedimentation basin. Integral agglomeration and precipitation system, characterized in that made.

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