KR102383450B1 - Polymer dissolving apparatus for water treatment - Google Patents

Abstract

The present invention relates to a polymer dissolving device for water treatment, which is used to dissolve, with appropriate concentration, polymer (polymeric coagulant) used to remove sludge in a water treatment process, comprising: a dissolving tank having a space part for dissolving polymer for water treatment and diluent (water); a polymer spray nozzle installed on an upper end of the dissolving tank to spray the polymer into the dissolving tank; a diluent (water) spray nozzle installed on the upper end of the dissolving tank to spray the diluent (water) into the dissolving tank; a churning part installed inside the dissolving tank to churn the polymer and the diluent (water); and a churning motor connected to the churning part to rotate the churning part. The space part of the dissolving tank includes: an upper space part having an inclined surface in a conic shape with a wide upper part and a narrow lower part and an outlet formed on the center of the lower part of the inclined surface, and having the polymer and the diluent (water), which are sprayed respectively from the polymer spray nozzle and the diluent (water) spray nozzle, primarily mixed therein; and a lower space part formed below the upper space part to communicate with the upper space part through the outlet, and having the polymer and the diluent (water), which are introduced through the outlet, secondarily mixed therein.

Description

Polymer dissolving apparatus for water treatment

The present invention relates to a polymer dissolving device for water treatment, and more particularly, to a polymer dissolving device for water treatment used to dissolve a polymer (polymer flocculant) used to remove sludge during a water treatment process at an appropriate concentration.

In general, in order to remove sludge during the water treatment process, a polymer (a polymer coagulant) is injected into the sewage to form a floc and precipitate. The polymer used at this time can be largely divided into a solid polymer (powder polymer) and a liquid polymer (emulsion polymer). The solid polymer has an advantage in terms of reducing the operating cost of the treatment facility because the purchase cost is low, but it does not dissolve well in dilute water and is agglomerated when added excessively and clogs the dissolution tank. Liquid polymer has the advantage of being easy to manage and easy to control the concentration, but it has a disadvantage in that efficiency is lowered if the oil component surrounding the polymer is not well removed.

As the advantages and disadvantages of each type of polymer are clear as described above, the polymer dissolving device is also manufactured according to the type of polymer that is mainly used. However, a polymer dissolving device that uses both a solid polymer and a liquid polymer at the same time often does not provide optimal efficiency. In order to solve this problem, it is required to develop a polymer dissolving device for water treatment that can use a solid polymer and a liquid polymer at the same time and achieve optimum efficiency.

On the other hand, as a technique devised to solve the above-mentioned problems of the prior art, a 'hybrid type automatically controlled polymer dissolution processing apparatus' (hereinafter referred to as 'prior art') of Korean Patent Registration No. 10-1737431 has been proposed.

The prior art is "a water supply unit that supplies dissolved water to the mixing unit; a polymer powder supply unit that stores the polymer powder and supplies it to the mixing unit; a polymer stock solution supply unit that stores the polymer stock solution and supplies it to the mixing unit; a spiral passage is formed therein, and the polymer A cyclone-type mixing unit in which powder and dissolved water, or polymer powder, polymer stock solution, and dissolved water are mixed with each other and rotated along a spiral passage to achieve primary dissolution; After the fluid first dissolved by the mixing unit is introduced into the stirrer A rapid dissolution tank in which the rapid dissolution is achieved while being stirred by the It relates to a "hybrid type automatically controlled polymer dissolution processing apparatus including a control unit", and is a technology capable of dissolving a solid polymer alone or dissolving a solid polymer and a liquid polymer together in a certain ratio.

However, the polymer dissolving device according to the prior art is difficult to manufacture because the configuration of the device is complicated and large, and there is a problem that a lot of space is required for installation.

[Document 1] Republic of Korea Patent Publication No. 10-1737431 (registered on May 12, 2017)

The present invention has been devised to solve the above problems, and it is possible to more efficiently dissolve each of the solid polymer and the liquid polymer used for water treatment individually or complexly, and the manufacturing, installation and maintenance is simplified by simplifying the device. An object of the present invention is to provide a polymer dissolving device for easy water treatment.

The problems to be solved by the present invention are not limited to the aforementioned problems. Other technical problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description.

In order to solve the above problems, an apparatus for dissolving polymer for water treatment according to an embodiment of the present invention includes a dissolution tank having a space for dissolving a polymer for water treatment and dilution water therein; a polymer injection nozzle installed on the upper end of the dissolution tank to inject the polymer into the dissolution tank; a dilution water injection nozzle installed at the upper end of the dissolution tank to inject the dilution water into the dissolution tank; a stirring unit installed inside the dissolution tank to stir the polymer and the dilution water; and a stirring motor connected to the stirring unit to rotate the stirring unit; but, the space part of the dissolution tank has a conical inclined surface with a wide upper part and a narrow lower part, and an outlet formed in the lower center of the inclined surface, and the polymer injection an upper space in which the polymer and the dilution water injected from the nozzle and the dilution water injection nozzle are first mixed; and a lower space formed at a lower side of the upper space to communicate with the upper space through the outlet, and in which the polymer introduced through the outlet and the dilution water are secondarily mixed.

According to an embodiment of the present invention, a circulation pipe connecting the lower portion of the lower space and the upper space; and a circulation pump installed in the circulation pipe to transfer the polymer and dilution water accommodated in the lower space to the upper space through the circulation pipe.

In an embodiment of the present invention, the polymer injection nozzle and the dilution water injection nozzle are installed near the upper edge of the upper space, and are installed to spray the polymer and the dilution water, respectively, in a tangential direction to the upper space in a plan view. .

In an embodiment of the present invention, the stirring unit, a rotating shaft installed to extend up and down in the center of the space of the dissolution tank; agitating blades installed at the lower end of the rotating shaft so as to be disposed in the lower space; and a stirring protrusion installed on the rotating shaft so as to be disposed adjacent to the outlet in the upper space portion.

In an embodiment of the present invention, female screws for coupling the polymer jetting nozzle and the dilution water jetting nozzle are respectively formed on the upper surface of the dissolution tank, and ends of the polymer jetting nozzle and the dilution water jetting nozzle are coupled to the respective female screws. The nozzle cover is installed to not protrude into the upper space, and a nozzle cover installed to cover the ends of the polymer spray nozzle and the dilution water spray nozzle is respectively coupled to an inner upper surface of the upper space, and the polymer spray is provided to each nozzle cover. A guide hole for guiding the polymer and dilution water sprayed from the nozzle and the dilution water spray nozzle to be sprayed in a tangential direction to the upper space in a plan view is formed.

In the polymer dissolving device for water treatment according to an embodiment of the present invention, the polymer and the diluent water are mixed in the upper space and the lower space of the dissolution tank, so that the solid polymer and the liquid polymer are more efficiently dissolved individually or in combination. In addition, since the device is simplified, there is an effect that manufacturing, installation and maintenance are easy.

In addition, in the polymer dissolving device for water treatment according to an embodiment of the present invention, the polymer and dilution water mixed in the lower space can be re-injected into the upper space by a circulation pipe and a circulation pump, so that the polymer can be more effectively dissolved, The inner wall of the upper space can be washed by the polymer and dilution water discharged through the circulation pipe, so maintenance is easy.

In addition, in the polymer dissolving device for water treatment according to an embodiment of the present invention, a vortex is generated as the polymer and the dilution water are sprayed in the tangential direction of the upper space part, so that the polymer and the dilution water can be mixed more smoothly, and thus the polymer There is an effect of more efficiently dissolving.

In addition, in the polymer dissolving device for water treatment according to an embodiment of the present invention, the stirring protrusion pushes the polymer and the dilution water to pass through the center of the outlet to the inclined surface of the upper space to be mixed again, thereby dissolving the polymer more efficiently. It works.

1 is a cross-sectional configuration diagram of a polymer dissolving device for water treatment according to an embodiment of the present invention.
Figure 2 is a view showing the polymer and dilution water added to the dissolution tank in Figure 1 with arrows.
3 is a view showing the transfer of the polymer and dilution water by the circulation pipe and the circulation pump in FIG. 1 with arrows.
4 is a plan view of a polymer dissolving device for water treatment according to an embodiment of the present invention.
5 is a cross-sectional view showing another embodiment of the injection structure of the polymer injection nozzle and the dilution water injection nozzle in the polymer dissolving device for water treatment according to the embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. For convenience of description, components shown in the drawings may be exaggerated, omitted, or schematically represented.

1 is a cross-sectional configuration diagram of a polymer dissolving apparatus for water treatment according to an embodiment of the present invention, FIG. 2 is a diagram showing the polymer and dilution water injected into the dissolution tank in FIG. 1 with arrows, and FIG. 3 is a circulation pipe in FIG. and arrows indicating that the polymer and dilution water are transferred by the circulation pump, and FIG. 4 is a plan view of the polymer dissolving device for water treatment according to an embodiment of the present invention.

1 to 4, the polymer dissolving device for water treatment according to an embodiment of the present invention is largely a dissolution tank 100, a polymer jetting nozzle 200, a dilution water jetting nozzle 300, and a stirring unit 400 ), a stirring motor 500 , a circulation pipe 600 , and a circulation pump 700 .

The dissolution tank 100 has a generally cylindrical container, and spaces 110 and 120 for dissolving the polymer for water treatment and the dilution water are formed therein.

Here, the space portions 110 and 120 have a conical inclined surface 111 having a wide upper portion and a narrow lower portion, and an outlet 112 formed in the lower center of the inclined surface 111, and the polymer injection nozzle 200. an upper space 110 in which the polymer and the dilution water injected from the dilution water injection nozzle 300 and the dilution water are first mixed; And the lower space 120 is formed to communicate with the upper space 110 by the outlet 112 on the lower side of the upper space 110, the polymer and the dilution water introduced through the outlet 112 are mixed secondarily. ); is included.

At this time, a discharge port 122 for discharging the dissolved polymer is formed at the lower end of the lower space portion 120 . In addition, a corresponding inclined surface 121 having a structure that is vertically symmetrical with the inclined surface 111 of the upper space 110 may be formed on the upper portion of the lower space portion 120 .

The polymer injection nozzle 200 is installed at the upper end of the dissolution tank 100 to inject the polymer for water treatment into the dissolution tank 100 . The polymer injection nozzle 200 may be provided such that one nozzle is connected to both a separate solid polymer storage tank and a liquid polymer storage tank by a branch pipe to selectively spray a solid polymer or a liquid polymer. Two polymer spray nozzles 200 are provided and are respectively connected to the solid polymer storage tank and the liquid polymer storage tank, so that the two polymer spray nozzles 200 may be provided to spray the solid polymer and the liquid polymer, respectively.

The dilution water injection nozzle 300 is installed at the upper end of the dissolution tank 100 to inject dilution water for dissolving the polymer into the dissolution tank 100 .

In the embodiment of the present invention, the polymer injection nozzle 200 and the dilution water injection nozzle 300 are installed near the upper edge of the upper space 110, and when viewed from a plan view, the tangential direction of the upper space 110 (td, see FIG. 4) is installed to spray the polymer and dilution water, respectively. In this polymer and dilution water injection structure, the polymer injection nozzle 200 and the dilution water injection nozzle 300 are installed on the inner upper surface of the upper space 110, but the polymer injection nozzle 200 and the dilution water injection nozzle ( 300) can be implemented by inclining at an angle of 30° to 60°, preferably about 45°, toward the tangential direction (td) of the upper space unit 110 .

According to the structure as described above, as the polymer and the dilution water are sprayed toward the tangential direction td of the upper space part, a vortex is generated along the inclined surface 111 of the upper space part 110, so that the polymer and the dilution water can be mixed more smoothly. and, accordingly, the polymer can be more efficiently dissolved. At this time, the polymer injection nozzle 200 and the dilution water injection nozzle 300 are positioned to face each other with respect to the center of the dissolution tank 100 so that the vortex generation by the injection of the polymer and the dilution water can be made more smoothly. It is preferable to be installed in

The stirring unit 400 is installed inside the dissolution tank 100 to stir the polymer and the dilution water, and is installed to extend vertically in the center of the space portions 110 and 120 of the dissolution tank 100 . rotation shaft 410; Stirring blades 420 installed at the lower end of the rotation shaft 410 so as to be disposed in the lower space portion 120; and a stirring protrusion 430 installed on the rotating shaft 410 to be disposed adjacent to the outlet 112 in the upper space 110 .

Here, the stirring blade 420 may be formed in a bar shape extending left and right about the rotation shaft 410 as shown, and may be formed in a shape such as an impeller if necessary. In addition, two or more of the stirring blades 420 may be provided so as to be vertically spaced apart from each other in the lower space portion 120 , and may also be provided in the upper space portion 110 if necessary.

The stirring protrusion 430 is formed to protrude to the outside of the rotation shaft 410 in the vicinity of the outlet 112, so that the polymer and dilution water that want to pass through the center of the outlet 112 can pass through the inclined surface of the upper space 110 ( 111) to allow the polymer to dissolve more efficiently by pushing it to the side and allowing it to mix again.

The stirring motor 500 is connected to the stirring unit 400 to rotate the stirring unit 400 .

The stirring motor 500 is installed on the upper side of the dissolution tank 100 and is connected to the upper end of the rotation shaft 410 to rotate the rotation shaft 410 .

The circulation pipe 600 is installed to connect the lower portion of the lower space 120 and the upper space 110 .

And the circulation pump 700 is installed in the circulation pipe 600, as shown in FIG. 3, the polymer and dilution water accommodated in the lower space part 120 through the circulation pipe 600 to the upper space part It is transferred to (110).

According to the circulation pipe 600 and the circulation pump 700 , the polymer and the dilution water mixed in the lower space part 120 are returned to the upper space part 110 by the circulation pipe 600 and the circulation pump 700 . By adding, the polymer can be more effectively dissolved. In addition, since the inner wall of the upper space 110 is washed by the polymer and dilution water discharged through the circulation pipe 600 , maintenance of the device is easy.

Two or more of the circulation pipe 600 and the circulation pump 700 may be provided along the circumferential direction of the dissolution tank 100, respectively.

In the polymer dissolving apparatus for water treatment according to an embodiment of the present invention configured as described above, the polymer and the dilution water are mixed in the upper space 110 and the lower space 120 of the dissolution tank 100, respectively, so that the solid polymer and liquid polymer can be more efficiently dissolved individually or in combination, and the device is simplified, thereby making it easy to manufacture, install, and maintain.

Hereinafter, another embodiment of the injection structure of the polymer injection nozzle 200 and the dilution water injection nozzle 300 will be described with further reference to FIG. 5 .

5 is a cross-sectional configuration diagram showing another embodiment of the injection structure of the polymer injection nozzle and the dilution water injection nozzle in the polymer dissolving device for water treatment according to an embodiment of the present invention.

As shown in FIG. 5, female screws 130 for coupling the polymer injection nozzle 200 and the dilution water injection nozzle 300 are respectively formed on the upper surface of the dissolution tank 100, and the polymer injection nozzle ( 200) and the end of the dilution water spray nozzle 300 are respectively coupled to the respective female screws 130 and are installed to non-protrude into the upper space 110, and on the inner upper surface of the upper space 110, the The polymer injection nozzle 200 and the nozzle cover 800 installed to cover the ends of the dilution water injection nozzle 300 are respectively coupled to each other, and the polymer injection nozzle 200 and the dilution water injection nozzle are respectively coupled to the nozzle cover 800 . Guide holes 810 for guiding the polymer and dilution water sprayed in 300 to be sprayed in a tangential direction of the upper space 110 when viewed in a plan view are respectively formed.

Here, since the female screw 130 may not be firmly coupled to the polymer injection nozzle 200 and the dilution water injection nozzle 300 when the top surface of the dissolution tank 100 is thin, as shown in the figure, the dissolution tank ( After adding the nut-shaped reinforcement block 140 to the upper surface of 100), the female screw 130 is formed to penetrate the reinforcement block 140, so that the polymer injection nozzle 200 and the dilution water injection nozzle 300 are solid. It would be desirable to make them coupled together.

According to the above structure, by forming the guide hole 810 in the nozzle cover 800 , it is possible to easily achieve a structure in which the polymer and the dilution water are sprayed in the tangential direction of the upper space portion 110 . In addition, when the polymer sprayed on the upper space 110 is adhered to the nozzle cover 800 , the nozzle cover 800 is removed and washed or replaced, thereby making it possible to easily maintain the device.

In the foregoing, the present invention has been described with reference to limited embodiments and drawings, but it will be apparent to those skilled in the art that various modifications are possible within the scope of the technical idea of the present invention. Accordingly, the protection scope of the present invention should be defined by the description of the claims and their equivalents.

100: dissolution tank 110: upper space part
111: slope 112: outlet
120: lower space 121: corresponding inclined surface
122: outlet 130: female thread
140: reinforcement block 200: polymer injection nozzle
300: dilution water injection nozzle 400: stirring part
410: rotation shaft 420: stirring blades
430: stirring projection 500: stirring motor
600: circulation pipe 700: circulation pump
800: nozzle cover 810: guide hole

Claims (5)

a dissolution tank 100 having upper and lower space portions 110 and 120 for dissolving the polymer for water treatment and dilution water therein;
a polymer injection nozzle 200 installed on the upper end of the dissolution tank 100 to inject the polymer into the dissolution tank 100;
a dilution water injection nozzle 300 installed at the upper end of the dissolution tank 100 to inject the dilution water into the dissolution tank 100;
a stirring unit 400 installed inside the dissolution tank 100 to stir the polymer and the dilution water;
a stirring motor 500 connected to the stirring unit 400 to rotate the stirring unit 400;
a circulation pipe 600 connecting the lower portion of the lower space 120 and the upper space 110; and
A circulation pump 700 installed in the circulation pipe 600 to transfer the polymer and dilution water accommodated in the lower space 120 to the upper space 110 through the circulation pipe 600; including;
Space parts 110 and 120 of the dissolution tank 100,
It has a conical inclined surface 111 with a wide upper part and a narrow lower part, and an outlet 112 formed in the lower center of the inclined surface 111, and is sprayed from the polymer spray nozzle 200 and the dilution water spray nozzle 300, respectively. The upper space 110 in which the polymer and the dilution water are first mixed; and
The lower space 120 is formed to communicate with the upper space 110 by the outlet 112 at the lower side of the upper space 110, and the polymer and dilution water introduced through the outlet 112 are mixed secondarily. It is made including;
The polymer injection nozzle 200 and the dilution water injection nozzle 300 are installed near the upper edge of the upper space part 110, respectively, toward the tangential direction of the upper space part 110 when viewed from a plan view. installed to spray
Female screws 130 for coupling the polymer injection nozzle 200 and the dilution water injection nozzle 300 are respectively formed on the upper surface of the dissolution tank 100,
Ends of the polymer injection nozzle 200 and the dilution water injection nozzle 300 are respectively coupled to the female screws 130 and are installed to non-protrude into the upper space 110,
A nozzle cover 800 installed to cover the ends of the polymer spray nozzle 200 and the dilution water spray nozzle 300 is coupled to the inner upper surface of the upper space 110, respectively,
In each of the nozzle covers 800, the polymer and the dilution water respectively sprayed from the polymer spray nozzle 200 and the dilution water spray nozzle 300 are sprayed in the tangential direction of the upper space 110 when viewed in a plan view. Polymer dissolving device for water treatment, characterized in that each guide hole 810 is formed.
According to claim 1,
The stirring unit 400,
a rotating shaft 410 installed to extend vertically in the center of the space portion 110, 120 of the dissolution tank 100;
Stirring blades 420 installed at the lower end of the rotary shaft 410 so as to be disposed in the lower space portion 120; and
Polymer dissolving apparatus for water treatment, characterized in that it comprises;
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