KR101029605B1 - Coagulant dosing and mixing device without power - Google Patents

Abstract

PURPOSE: A non-power coherence mixing apparatus is provided to remove additional coherence, precipitating, or filtering processes for mixing processing water with a coagulant, and to reduce the usage amount of the coagulant for removing phosphorus. CONSTITUTION: A non-power coherence mixing apparatus(10) comprises the following: a device body(20) dipped inside an aeration basin(1); a coagulant supplying nozzle(30) supplying a pre-fixed amount of coagulant using a metering pump; and plural mixing guide plates(40) combined with the device body from the upper side of the coagulant supplying nozzle, including multiple through-holes and partition walls for inducing the mixture of processing water.

Description

Coagulant dosing and mixing device without power}

The present invention relates to a non-powered flocculation and mixing apparatus provided in an aeration tank, and more specifically, no additional flocculation, sedimentation / floating, or filtration processes are required, and the flocculant may be treated with the treated water before the treated water flows from the aeration tank to the effluent. By sufficiently mixing, the sedimentation efficiency of the secondary settler battery can be improved, and the amount of coagulant used to remove phosphorus can be reduced to reduce the maintenance cost, and the phosphorus removal efficiency can be improved. It relates to a non-powered cohesive mixing apparatus provided.

Due to the excess of nutrients such as nitrogen and phosphorus (especially phosphorus) flowing into the stream, algae generation and eutrophication proceed, contaminating the river water system, impeding the use of water, and adversely affecting water purification costs.

A brief description of existing sewage treatment technologies or processes with phosphorus removal is given below.

First, there is a biological removal process, but the removal efficiency is known to be inadequate. For this reason, it is being applied as a method of adding a chemical coagulation process to the existing biological removal process. Chemicals for removing phosphorus, that is, a flocculant, may be introduced by introducing biological treatment water into a separate flocculation facility, and a flocculant may be introduced into an aeration tank, also called a bioreactor.

In the former case, coagulation-precipitation / floating / filtration processes are performed on biologically treated water (secondary sediment effluent), which may be uneconomical with the addition of additional facilities. In contrast, in the latter case, the method of injecting a coagulant into the initial settling point of entry into the biological treatment process or the end water surface of the aeration tank may be more effective, but in this case, due to the lack of proper agitation, Maintenance costs are increased because it typically takes two to four times more than the amount needed to remove phosphorus.

To improve this, there is a method of installing a separate stirring facility in the waterway between the rear end of the aeration tank and the final sedimentation basin or increasing the mixing effect by using a static mixer. Causes a problem that is raised.

Therefore, in general, a flocculant is introduced into an outflow channel into which the treated water in the aeration tank flows out to be settled by being transferred to a settling tank, but in most cases, the flocculant is not properly mixed with the treated water. .

For reference, the current law sets the water quality standards for effluents and restricts them to 20 mg / l nitrogen and 2 mg / l phosphorus based on the amount of effluent water in the future. In the future, in order to more fully suppress eutrophication and improve the efficiency of stream water quality improvement, It is inevitable that the restriction on the inflow of nutrients (nitrogen and phosphorus) into rivers is inevitable.In 2012, in relation to the phosphorus emission standard, the effluent standard of phosphorus from 0.2 to 0.5mg / ℓ will be applied in Korea. In order to meet even greater water quality standards, technology development is needed to achieve lower phosphorus content (eg 0.03 mg / l) in effluents.

It is an object of the present invention that no additional flocculation, sedimentation / floating or filtration processes are required, and the flocculation agent can be sufficiently mixed with the treated water before the treated water is discharged from the aeration tank into the effluent to improve the settling efficiency of the secondary settler battery. By reducing the amount of coagulant for removal to reduce the maintenance cost, it is possible to improve the phosphorus removal efficiency to provide a non-cohesive cohesion mixing apparatus is provided in the aeration tank that can contribute to environmental conservation.

The object is arranged to be immersed in the aeration tank, the device body is formed in a tubular structure to form a space in which the treated water in the aeration tank flows therein; A coagulant supply nozzle disposed in the lower region of the apparatus main body and supplying a coagulant in a predetermined amount by a metering pump; And a plurality of mixtures coupled to the apparatus main body in the upper region of the coagulant supply nozzle and stacked along the up and down direction, in which a plurality of through holes and a plurality of diaphragms are alternately formed to induce mixing of the treated water on a plate surface. It is achieved by a non-powered cohesive mixing apparatus provided in the aeration tank, characterized in that it comprises a guide plate.

Here, the mixing guide plates are stacked such that the through hole and the diaphragm are alternately disposed when stacked.

The diaphragms are arranged such that their vertices face downward, and side plates are further provided on the side surfaces of the diaphragms.

Here, the apparatus main body, a plurality of frames are arranged in a rectangular composition spaced apart from each other; And a plurality of side plates respectively coupled to a pair of adjacent frames of the plurality of frames, and at least one of the plurality of side plates includes a cutout forming a lower position than an upper end of the adjacent side plates. Can be formed.

In addition, it may further include a plurality of zigzag cardboard member to be coupled to the frame to support the plurality of mixing guide plate.

According to the present invention, no additional flocculation, sedimentation / floating, or filtration processes are required, and the flocculation agent is sufficiently mixed with the treated water before the treated water is discharged from the aeration tank to the effluent to improve the sedimentation efficiency of the secondary settler battery and remove phosphorus. In addition to reducing the amount of flocculant used for the maintenance cost can be reduced as well as to improve the phosphorus removal efficiency can contribute to environmental conservation.

1 is a perspective view of a state in which a non-cohesive cohesion mixing apparatus according to an embodiment of the present invention is installed in an aeration tank;
2 is an enlarged view of a non-powered cohesion mixing apparatus,
3 is a perspective view of FIG.
4 is a perspective view of the side plates of the apparatus body removed from Figure 3,
5 is a perspective view of an adjacent pair of mixing guide plates,
Figure 6 is an experimental example using a non-powered cohesive mixing apparatus according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

1 is a perspective view of a non-cohesive cohesion mixing apparatus installed in an aeration tank according to an embodiment of the present invention, FIG. 2 is an enlarged view of a non-cohesive cohesion mixing apparatus, FIG. 3 is a perspective view of FIG. 2, FIG. 4 is an apparatus body in FIG. 3. 5 is a perspective view of a pair of neighboring mixing guide plates, and FIG. 6 is an experimental example using a non-powered cohesion mixing apparatus according to an embodiment of the present invention.

As can be seen through Figure 1, the non-cohesive cohesion mixing apparatus 10 of the present embodiment is provided in the aeration tank (1). Aeration tank (1) is a bioreactor, which is a facility for treating sewage by putting microorganisms in a sewage treatment plant and reacting, and aeration tank (1) causes a microbial reaction due to oxygen input and proceeds biological treatment of treated water.

One side of the aeration tank 1 is provided with an outflow passage 2 through which the treated water in which the biological treatment progress is completed, in particular, the non-excessive amount of flocculant mixed by the non-powered cohesion mixing apparatus 10 of the present embodiment, flows out.

For reference, in the case of the present embodiment, one non-cohesive cohesion mixing apparatus 10 is installed in the aeration tank 1, but in some cases, two or more non-cohesive cohesion mixing apparatus 10 may be installed.

As shown in FIG. 2 to FIG. 5, the non-cohesive cohesion mixing apparatus 10 includes an apparatus body 20, a coagulant supply nozzle 30, and a plurality of mixing guide plates 40.

The device body 20 is manufactured in a tubular structure in which a space through which the treated water in the aeration tank 1 flows is formed therein. In the present embodiment, the apparatus body 10 is manufactured to have a generally rectangular barrel structure, but the scope of the present invention is not necessarily limited to the shape thereof.

The apparatus main body 20 includes a plurality of frames 21 arranged in a rectangular structure in a spaced apart state, that is, arranged vertically one by one in a corner region, and a pair of adjacent frames 21 among the plurality of frames 21. It is provided with a plurality of side plates 22 to 25 respectively coupled to).

The plurality of side plates 22 to 25 may be divided into the front plate 22, the rear plate 23, the left plate 24, and the right plate 25 according to their positions. The plurality of side plates 22 to 25 are arranged to reach the upper end of the frame 21 from a position slightly spaced upward from the lower end of the frame 21.

At this time, unlike the front plate 22, a cutout 23a is formed at the upper end of the rear plate 23 to form a lower position than the upper end of the front plate 22, the left plate 24 and the right plate 25. . The treated water rising in the apparatus main body 20 may form a path toward the outflow passage 2 through the cutout portion 23a having a low height.

Unlike the metal frame 21, the plurality of side plates 22 to 25 may be made of transparent or translucent glass or plastic. Although not shown in the drawings, a cover may be further disposed on the upper portion of the apparatus body 20.

As shown in FIG. 1, the coagulant supply nozzle 30 is disposed in the lower region of the device body 20 to supply the coagulant to the inside of the device body 20. Although not shown, a coagulant supply nozzle 30 is connected to a metering pump (not shown) so that the metering pump is always supplied with a certain amount of coagulant into the apparatus body 20.

On the other hand, the plurality of mixing guide plate 40 serves to induce mixing of the flocculant to the treated water.

The mixing guide plate 40 is coupled to the apparatus body 20 in the upper region of the coagulant supply nozzle 30 is provided in a plurality of layers along the vertical direction.

In the present embodiment, the plurality of mixing guide plate 40 is provided in three layers along the vertical direction while pairing two by two, each of which is supported by the zigzag cardboard member 50 back and forth, the device It is coupled to the frame 21 of the main body 20. The method of coupling is bolted as shown.

Of course, this is merely an embodiment and does not necessarily follow its structure. That is, the spaced intervals of the plurality of mixing guide plates 40 along the vertical direction may be all the same, and the mixing guide plates 40 may be coupled to the apparatus main body 20 without the zigzag cardboard member 50. .

All of the plurality of mixing guide plate 40 is manufactured in a zigzag format in which triangles are continuously connected when viewed from the side.

In addition, the plate surface of the mixing guide plate 40 is provided with a plurality of through holes 41 through which the treated water floated upward, and a plurality of diaphragms 42 positioned above the plurality of through holes 41 to branch the treated water. . The plurality of through holes 41 and the plurality of diaphragms 42 are alternately formed with each other over the entire area of the mixing guide plate 40.

In this structure, that is, the through holes 41 and the diaphragms 42 are formed alternately with each other, all the mixing guide plates 40 have the same structure. However, only the laminated arrangement of the mixing guide plates 40 is different.

In other words, the through holes 41 and the plates 42 formed in the mixing guide plates 40 along the vertical direction are alternately arranged one by one. That is, they are arranged alternately one by one in the vertical through-hole 41, diaphragm 42, through-hole 41, diaphragm 42 in the vertical direction. At this time, the diaphragm 42 which has a substantially V shape is arrange | positioned with the orientation so that the vertex may face downward. In addition, as shown in FIG. 5, the side plates 43 may be further provided on the side surfaces of the plates 42, and the treated water may not only be branched left and right by the V-shaped plates 42 but also branched back and forth by the side plates 43. So that the mixing efficiency of the treated water is increased.

Accordingly, as shown in FIG. 5, the treated water floating in the A direction through the through-hole 41 of the mixing guide plate 40 positioned at the lower portion is disposed at another mixing guide plate 40 disposed vertically upward. After hitting the diaphragm 42 at B, the vertex region of the installed V-shaped diaphragm 42, and split into two branches C1 and C2, D1 and through each of the through-holes 41 located at both sides of the diaphragm 42, respectively. Raise in the direction D2. Of course, through the side plate 43 is also branched to the through-holes 42 arranged in front and rear of the diaphragm 42 to induce uniform mixing of the treated water. The treated water raised again through each of the through holes 41 hits the diaphragm 42 of the mixing guide plate 40 disposed above the vertically again, and then splits back and forth, left and right again, and then through the through holes 41 around the through holes 41. As the process is repeated, it is possible to induce uniform mixing of the flocculant.

Hereinafter, the operation of the non-powered cohesion mixing apparatus of the present embodiment will be described with reference to FIG. 1 mainly.

In the state where the non-powered coagulation and mixing apparatus 10 of the present embodiment is immersed in the aeration tank 1, a quantitative coagulant is provided upward from the lower region of the apparatus main body 20 through the coagulant supply nozzle 30. Of course, the dose of flocculant is metered by the metering pump.

The coagulant provided upward from the lower region of the apparatus body 20 through the coagulant supply nozzle 30 is repeated while hitting the plurality of mixing guide plates 40 in the process toward the upper region of the apparatus body 20. Uniform mixing is achieved.

That is, as described above with reference to FIG. 5, the treated water floating through the through-hole 41 of the mixing guide plate 40 hits the V-shaped diaphragm 42 positioned vertically above, and then splits back and forth, left and right. , Through each of the through-holes 41 positioned at the front, rear, left and right sides of the diaphragm 42, and after being raised, strikes the diaphragm 42 of the mixing guide plate 40 disposed above the vertically again. After being branched, it rises through the periphery 41 of the periphery thereof, and as the process proceeds repeatedly, the flocculant is uniformly mixed.

The treated water mixed with the coagulant and ejected to the upper portion of the apparatus body 20 is directed to the outflow passage 2 through the cutout portion 23a having a low height.

According to the non-cohesive cohesion mixing apparatus 10 of the present embodiment having such a structure and action, no additional coagulation, precipitation / floating, or filtration processes are required as in the prior art, and the treated water flows from the aeration tank 1 to the outflow passage 2. It is possible to improve the sedimentation efficiency of the secondary settler by making the coagulant sufficiently mixed with the treated water before use, and to reduce the maintenance cost by reducing the amount of coagulant used to remove phosphorus, and to improve the phosphorus removal efficiency. It can contribute to conservation.

Figure 6 is a graph showing the effect of using the non-cohesive cohesion mixing apparatus 10 of the present embodiment compared with the conventional top injection method. In Experiment 1, when the dissolved phosphorus concentration of raw water was 0.51 mg / L, when the flocculant was injected into the upper part of the aeration tank near the effluent, the phosphorus concentration decreased to 0.40 mg / L, Injecting and mixing the flocculant using), it can be seen that the phosphorus concentration after the treatment was reduced to 0.29 mg / L.

In Experiment 2, when the dissolved phosphorus concentration of raw water was 0.44 mg / L, the phosphorus concentration was 0.12 mg / L when the upper injection was carried out as in the prior art, and the phosphorus concentration after the treatment was 0.01 when the mixing device 10 of the present example was used. It can be seen that it was significantly reduced to mg / L. Therefore, when using the non-cohesive cohesion mixing apparatus 10 of the present embodiment, it can be seen that the coagulation efficiency of the coagulant administered is significantly higher than that of the conventional method, and thus the amount of coagulant used to exhibit the same coagulation efficiency is also considerably high. This will not only reduce maintenance costs, but also improve phosphorus removal efficiency, contributing to environmental conservation.

As described above, the present invention is not limited to the described embodiments, and various modifications and changes can be made without departing from the spirit and scope of the present invention, which will be apparent to those skilled in the art. Therefore, such modifications or variations will have to be belong to the claims of the present invention.

1: Aeration tank 2: Runoff
10: no power cohesive mixing apparatus 20: apparatus body
21 frame 22: front panel
23: rear panel 24: left panel
25: right side plate 30: flocculant supply nozzle
40: mixing guide plate 41: through hole
42: plate 50: zigzag cardboard member

Claims (5)

An apparatus body disposed to be immersed in the aeration tank, the apparatus body having a tubular structure and having a space in which the treated water in the aeration tank flows;
A coagulant supply nozzle disposed in the lower region of the apparatus main body and supplying a coagulant in a predetermined amount by a metering pump; And
Coupled to the apparatus main body in the upper region of the flocculant supply nozzle is provided to be stacked along the vertical direction, a plurality of induction and a plurality of holes are alternately formed in the plate surface to induce mixing of the treated water Includes a plate,
The device body,
A plurality of frames arranged in a rectangular composition spaced apart from each other; And
It includes a plurality of side plates each coupled to a pair of adjacent frames of the plurality of frames,
At least one of the plurality of side plates of the non-coherent cohesion mixing apparatus provided in the aeration tank, characterized in that the cut portion is formed to form a lower position than the upper end of the adjacent side plate. The method of claim 1,
And said mixing guide plates are laminated in aeration tank, characterized in that the through hole and the diaphragm are alternately arranged when stacked. The method of claim 2,
The diaphragms are arranged with their vertices pointing downwards,
Side plates of the non-coherent cohesion mixing apparatus provided in the aeration tank, characterized in that the side plate is further provided. delete The method of claim 1,
And a plurality of zigzag-type cardboard paper members coupled to the frame to support the plurality of mixing guide plates.

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