KR20060029765A - Upflow type integrated flocculation and sedimentation device for water treatment - Google Patents

Abstract

The present invention relates to an upflow type integrated flocculation and sedimentation device for water treatment, to compensate for the disadvantages of the existing water treatment process requiring large-scale land, and to enable unmanned operation and water treatment of the water treatment process. The present invention relates to a device capable of solving the problem of deterioration of raw water quality and the high turbidity water which occurs frequently during the rainy season. The integrated coagulation and sedimentation device of the present invention includes a reaction water inlet pipe provided at the center of the circular precipitation part (3). In the coagulation reaction unit 10 consisting of a sliding cone 12 and a rectifying plate 14 composed of several stages in (1), the raw water and the coagulant are naturally mixed to form an agglomeration reaction. Moving upward from the bottom of (3) is the upflow sedimentation apparatus in which the floc is settled downward by the inner inclined plate 20 and the upper inclined plate 6.

Circular sedimentation device, flocculation paper, sloped plate, sliding cone, sedimentation efficiency, turbulence

Description

Packaged inclined clarifier with accelerating flocculation for water treatment plant}

1 is a cross-sectional view showing the structure of a conventional circular precipitation apparatus,

2 is a cross-sectional view of an integrated coagulation / sedimentation apparatus according to the present invention;

Figure 3 is an enlarged perspective view showing a part of the incision state of the aggregation reaction,

4 is a cross-sectional view showing the flow of raw water and flocculant in the flocculation reaction part;

5 is a perspective view showing an example of the upper inclined plate used in the present invention,

6 is a perspective view showing another example of the upper inclined plate used in the present invention,

* Explanation of symbols for main parts of the drawings

1: reaction water inlet pipe 2: treated water outlet pipe

3: settling portion 4: hopper

5: sludge discharge pipe 6: upper slope plate

10: agglomeration reaction part 12: sliding cone

14: baffle plate 20: internal inclined plate

22: inner inclined plate 24: outer inclined plate

T1: flocculant tank T2: flocculent aid tank

M: Stirring tank W: Raw water

The present invention relates to an upflow type integrated flocculation and sedimentation device for water treatment, and in detail, an agglomeration reaction part in which raw water and a flocculant are mixed is formed in a reaction water inlet pipe in the center of a circular sedimentation basin as an upflow sedimentation facility. By minimizing the area and enabling the flocculation reaction part and the settling part to operate without power, the motorization and unmanned operation are made possible.

1 is a cross-sectional view showing the structure of a conventional water treatment circular sedimentation apparatus, the circular sedimentation apparatus for purified water and waste water treatment is the inlet pipe 1 through which raw water is introduced and the treated water from which floc and sludge have been removed from the introduced raw water. The discharged treated water discharge pipes 2 are installed to face each other, and a funnel-shaped hopper 4 is formed at the lower end of the settling portion 3 so that the flocs contained in the raw water can be easily settled. Sludge discharge pipe (5) is provided at the bottom or one side of the), and the inside of the sedimentation unit (3) is made of a structure in which the inclined plate (6) for removing the fine floc and sediment contained in the raw water is installed.

On the other hand, in the conventional water treatment plant, apart from the circular sedimentation apparatus described above, chemicals are injected into raw water introduced from the landing well, and mixed with them rapidly by a mixer to form a micro floc, and micro floc particles generated in the mixed paper. There was a problem that a large site was required to install them because larger and heavier flocculation had to be provided to increase the sedimentation effect in the sedimentation basin. There was also a problem that a lot of personnel and power (energy) had to be put in for management.

In addition, in the case of the existing horizontal flow sedimentation basin, there is no preventive measure against the density flow occurring from June to September due to the climate condition of Korea, and the deterioration of water due to the flow of floc continuously occurs at the end of the sedimentation. In this case, it is investigated that the thin ice is formed at the top, which severely affects the precipitation efficiency.

The present invention has been made in order to solve the above-mentioned conventional problems, the object of the present invention is to use the upflow type circular precipitation apparatus using gravity directly mounted on the inclined plate, but the required site by forming the aggregation reaction unit integrally here By minimizing and producing the standard sedimentation device in the factory, it is possible to shorten the construction period at the installation site, and it uses upflow type integrated flocculation and sedimentation device for water treatment that does not require power cost and does not cause trouble of equipment. To provide.

In order to achieve the above object, the present invention is provided with an agglomeration reaction part consisting of a sliding cone and a rectifying plate composed of several stages in a reaction water inlet pipe provided in the center of the circular precipitation apparatus, where the raw water and the coagulant are naturally mixed with the agglomeration reaction. The raw water subjected to the coagulation reaction is moved upward from the bottom of the circular sedimentation device while floc is settled downward by the inclined plate, and the treated water flows up to the treated water discharge pipe at the upper part of the sedimentation device. Provide a precipitation device.

In addition, the present invention by designing and installing an inclined plate on the top of the sedimentation device in consideration of the turning force affecting the flow of the water in the upflow sedimentation equipment having a very low flow rate to prevent the occurrence of turbulence sedimentation efficiency of the treated water The present invention provides an upstream integrated flocculation and sedimentation device for water treatment.

Hereinafter, with reference to the accompanying drawings, preferred embodiments that do not limit the present invention will be described in detail.

Figure 2 is a cross-sectional view showing the structure of the circular sedimentation apparatus according to the present invention, the present invention is the reaction water inlet pipe 1, the raw water is introduced and the treated water discharged to discharge the treated water from the floc and sludge is removed from the introduced raw water A pipe (2) is installed at the top, and a funnel-shaped hopper (4) is formed at the lower end of the settling portion (3) so that the flocs contained in the raw water can be easily settled, and to the bottom or one side of the hopper (4). The sludge discharge pipe 5 is provided, and the upper slant plate 6 is provided at the upper portion of the settling portion 3 to remove the fine floc contained in the raw water. In the upper part of 1), a coagulant tank (T1) and a coagulant aid tank (T2) for injecting a coagulant and a coagulant auxiliary agent into the raw water (W) is installed and mixed with the raw water (W) to the inside of the reaction water inlet pipe (1) The reaction water oil Agglomeration reaction part 10 in which the sliding cone 12 and the rectifying plate 14 are installed in multiple stages so as to intersect at regular intervals up and down in the entrance tube 1 so that the raw water and the coagulant are mixed to allow the coagulation reaction to occur. Is formed, the inside of the settling portion 3 is installed inside the inclined plate 20 inclined 60 ° with respect to the flow direction (vertical direction), the raw water, the agglomeration reaction is carried out from the bottom of the circular settler (3) to the top While the floc is settled to the bottom by the inclined plate 20, the treated water is to flow to the treated water discharge pipe (2) of the upper part of the sedimentation basin.

Reference numeral 'M' in the figure is a stirring tank for stirring the raw water W and the coagulant aid.

The inner inclined plate 20 has an upper end fixed to an outer side of the reaction water inlet pipe 1 and an inner inclined plate 22 extended to a lower outer side, and an upper end thereof is fixed to an inner wall of the precipitation unit 3, and a diameter thereof is lowered inward. The contracted outer inclined plate 24 is formed in a pair so that the flow rate of the reaction water supplied downward from the agglomeration reaction unit 10 is controlled by the inclined plates 20 and 22 to be directed upward of the settling unit 3. By allowing the flow rate to be relaxed, generation of turbulence that prevents the floc from settling is suppressed.

In addition, the upper inclined plate 6 at the upper end of the settling portion 3 is installed to be inclined upward in a direction (clockwise in the northern hemisphere and counterclockwise in the southern hemisphere) in which a forward force acts on the water to be treated.

In the present invention, the upper sloping plate may be made of a lamellar (lamella) type, may be made of a spiral (propeller) type, by appropriately selecting the installation angle of the upper swash plate according to the latitude of the area where the circular settler is installed The flow of the water to be treated can be best controlled.

The lamella-type upper inclined plate 6 shown in FIG. 5 has a plurality of wing plates 6b radially in the center tube 6a from the root portion R of the wing plate 6b at the same inclination angle A. It is designed to achieve the same pitch angle to the edge portion (E), the inclined plate 6 shown in Figure 6 is the same inclination angle of the plurality of wing plates 6b radially in the center tube (6a) (A) The right angle at the root portion (R) of the wing plate (6b) and the pitch angle gradually decreases toward the end (E).

5 and 6 is an inclined plate used in a circular precipitation apparatus located in the northern hemisphere like Uri, and all wing plates 6b of the inclined plate 6 are formed to be inclined upward in a clockwise direction. The angle of inclination of the vane 6b varies depending on the latitude, preferably in the case of low latitudes, so that the angle of the inclined plate is larger and the angle of inclination becomes smaller toward higher latitudes.

In addition, the agglomeration reaction unit 10 provided in the reaction water inlet pipe 1 is composed of a sliding cone 12 and a rectifying plate 14, as shown in Figure 3 and 4, the sliding cone ( 12 is formed to be inclined downward to the inner side and the inner side is open downward to allow the raw water and the coagulant to flow into the center of the reaction water inlet pipe 1 through the sliding cone 12, and the rectifying plate 14; The plate is installed in a horizontal state so that the raw water and the coagulant concentrated in the center by the sliding cone 12 are diffused outward again. The sliding cone 12 and the rectifying plate 14 are reaction water inlet pipes 10 Since it is repeatedly installed at regular intervals from the upper part to the lower part of), the raw water and the coagulant are naturally mixed and the coagulation reaction is actively performed.

The reaction water in which the aggregation reaction is made is precipitated while moving from the lower part of the precipitation part 3 to the upper part, and the reaction water moving to the upper part is precipitated while passing through the inner inclined plate 20, and the inner inclined plate 20. As water moves to the top, the settling sludge flows to the bottom, increasing the treatment efficiency.

On the other hand, the treated water flowing into the lower portion of the settling section 3 flows toward the upper flow at a slow flow rate (about 44mm / min; reference to the upward flow rate in the upflow circular settler is 40 ~ 50mm / minute), and At the same very slow flow rate, the turning force is effective, and the treated water flows upward while rotating clockwise in the northern hemisphere. The settling water (treatment water) almost reaching the top of the settling basin (3) is settled downward through the upper inclined plate (6) installed inclined upwardly clockwise, and the supernatant from which the floc is removed is passed through a weir. Overflowed and discharged to the treated water discharge pipe (2).

Sedimented sewage water is sent to the next process through the treated water discharge pipe (2) through the outlet weir of the upper part of the settling section (3), the sludge precipitated in the hopper (4) is concentrated, the concentrated sludge Is sent to a dehydrator or sludge dry bed not shown through the valve of the sludge discharge pipe (5).

As described above, the integrated coagulation / sedimentation device according to the present invention is provided with a coagulation reaction part composed of a sliding cone and a rectifying plate composed of several stages in a reaction water inlet pipe provided at the center of a circular sedimentation basin, and the coagulant is naturally mixed with raw water and a coagulant. This efficient, the flocculation reaction is carried out from the bottom of the circular sedimentation basin while the floc is settled to the bottom by the inclined plate, according to the present invention required a large area to minimize the required land area Compared to the water treatment process, it is more realistic and economical, and the coagulation, sedimentation, and sludge removal are performed by gravity, which is a force existing in the natural world, so that it can be operated without power, and the water purification process can be unmanned. Deterioration of water quality and frequent occurrence during rainy season And it can effectively solve the turbidity problem, because the phenomenon of freezing in winter and mildoryu settler top that can occur in summer does not occur has an advantage that can be operated normally, the settler regardless of the season.

Claims (4)

In the upper part of the sedimentation unit, a reaction water inlet pipe into which raw water and flocculant are introduced, and a treated water discharge pipe from which floc and sludge have been removed from the introduced reaction water are discharged, and a hopper having a funnel form is formed at the lower part thereof. In the lower or one side of the hopper is provided with a sludge discharge pipe, the upper portion of the settled portion is made of a structure provided with an upper inclined plate for removing the fine floc contained in the raw water, A coagulant tank (T1) and a coagulant aid tank (T2) for injecting a coagulant and a coagulant aid to the raw water (W) is installed on the upper portion of the reaction water inlet pipe (1), the coagulant and coagulant aid is mixed with the raw water and the reaction water It is introduced into the inlet pipe (1), the inside of the reaction water inlet pipe (1) is installed in multiple stages so that the sliding cone 12 and the rectifying plate (14) intersect at regular intervals up and down, raw water and flocculant An upflow integrated flocculation and sedimentation device for water treatment, characterized in that the flocculation reaction part (10) is formed so that the flocculation reaction is carried out. The method according to claim 1, The inside of the sedimentation part (3) is an upstream integrated flocculation and sedimentation device for water treatment, characterized in that the inner inclined plate 20 is inclined to 60 ° with respect to the flow direction. The method according to claim 1 or 2, The sliding cone 12 is formed to be inclined downward to the inner side and the inner side is opened downward, the rectifying plate 14 is installed upstream integrated flocculation and sedimentation apparatus for water treatment. The method according to claim 2, The inner inclined plate 20 has an upper end fixed to an outer side of the reaction water inlet pipe 1 and an inner inclined plate 22 extended to a lower outer side, and an upper end thereof is fixed to an inner wall of the precipitation unit 3, and a diameter thereof is lowered inward. An upflow flocculation and sedimentation device for water treatment, characterized in that the contracted outer inclined plate (24) forms a pair.

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