KR101602289B1

KR101602289B1 - Apparatus for pressure-floating using reverse vortex micro-bubble generator

Info

Publication number: KR101602289B1
Application number: KR1020150095768A
Authority: KR
Inventors: 구자옥; 이남국
Original assignee: 대호산업 주식회사
Priority date: 2015-07-06
Filing date: 2015-07-06
Publication date: 2016-03-21

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressurized flotation apparatus using a reverse vortex type micro-bubble generating apparatus, more particularly, to a method and apparatus for generating a micro- The present invention provides a pressurized floating equipment using a reverse vortex micro-bubble generator capable of more easily removing foreign substances contained in raw water by allowing floatation of sludge.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pressurized flotation apparatus using a reverse vortex type micro-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressurized flotation apparatus using a reverse vortex micro-bubble generating apparatus, and more particularly, to a pressurized flotation apparatus using a reverse vortex micro- The present invention relates to a pressurized floating equipment using a generator.

The Ministry of Environment has strengthened the water quality standards of the effluent water of the public sewage treatment facilities in the vicinity of Jincheon, which flows into the main water conservation area or the main river of the 4 major rivers,

Enhanced effluent quality standards are focused on water use and ecosystem conservation in public waters, and have greatly reinforced the criteria for nutrients total phosphorus and organic matter, which are the main factors of eutrophication.

As the quality of effluent water quality has been strengthened, there is a limit to TP removal in the existing biological nitrogen removal process (BNR process). Therefore, a chemical treatment method is additionally installed to remove dissolved phosphorus after the biological treatment process do.

The most reliable and economical method for removing phosphorus is known as solid-liquid separation by coagulation. As a method of solid-liquid separation after flocculation, precipitation, floatation and filtration are mainly applied.

The double flotation method is a method to remove the solid particles in the water by floating on the water surface when treating sewage and wastewater, and it can be roughly divided into gravity type floatation and trapped floatation method.

Gravity type injuries can be applied only to oil, such as oil, which is less dense than water.

In general, floating refers to bulge-type floatation, and even particles that are higher in density than water can float and separate the particles if they adhere to the bubbles. In the bulb-type floatation method, Thereby increasing the lifting speed remarkably.

Although it is possible to increase the removal rate of suspended particles by attaching sufficient bubbles to the suspended particles to be removed in this way, the solid-liquid separation of many sewage and wastewater treatments is mainly carried out mainly by gravity sedimentation .

This is because it is important to distribute fine bubbles evenly in the floating separation, but it is difficult to make and distribute fine bubbles.

Korean Patent No. 10-0767724 discloses a biological wastewater treatment method and apparatus through sludge flotation separation.

Korea registered patent [10-0767724] (Registration date: October 10, 2007)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a method and apparatus for generating fine bubbles through various processes and uniformly spraying generated fine bubbles And to provide a pressurized floating equipment using a reverse vortex type microbubble generator capable of floating separation of sludge.

The objects of the embodiments of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description .

According to an aspect of the present invention, there is provided a pressurized flotation apparatus using a reverse vortex micro-bubble generating apparatus, wherein raw water pumped from an external pump is introduced, a PH composition and a primary coagulant are introduced A mixer assist inflow side wall 120 spaced a certain distance from the sidewall into which the raw water flows and which is spaced apart from the bottom floor by a predetermined distance, And a mixing bath outlet sidewall (130) formed on a side from which raw water flows and having a hole through which raw water can pass; A flocculation assistant half 210 for introducing raw water mixed with the PH forming agent and the primary flocculating agent into the mixing tank 100 and injecting the secondary flocculating agent and rotating the impeller located below the water surface to mix the raw water and the chemicals, A flocculating tank inflow side wall 220 spaced a certain distance from the mixing tank outlet sidewall 130 and spaced apart from the bottom floor by a predetermined distance and a flocculating tank inflow side wall 220 formed on the side where the raw water flows out, A flocculating bath (200) including a side wall (230); The raw water mixed from the flocculation tank 200 to the secondary flocculant flows into the bottom of the flocculation tank 200 and flows into the bottom of the flocculation tank 200. A floatation inflow side wall 320 spaced apart from the floatation inflow side wall 320 and a floatation outflow side wall 330 spaced from the float inflow side wall 320 by a predetermined distance from the bottom, A floating tank 300 for floating the sludge flocculated by the injected minute bubbles to the water surface; And a sludge slope part 410 formed in a shape of a plate and inclined to the outside of the sidewall into which the raw water flows, A sludge tank 400; A plurality of rotating shafts 510 installed at a predetermined distance from the sludge tank 400 at the upper part of the water surface of the floatation tank 300 and installed in a direction perpendicular to the traveling direction of the raw water, A chain 530 connected to wrap the sprockets 520 positioned on a straight line parallel to the traveling direction of the raw water and a scraper 540 horizontally connected to the chain 530, A sludge scraper portion (500) comprising: An outflow tank 600 into which raw water having passed through a lower portion of the sludge tank 400 flows, and a lower surface and a side surface of the sludge tank 400 are closed; And a hopper-shaped treatment water discharge portion 710 connected to an outlet of the treatment water discharge pipe provided at a predetermined distance from the lower surface of the outflow bath 600. The height of the treatment water discharge portion 710, A valve 700; And a fine bubble generating pump unit (900) connected to the fine bubble jetting port (310) and sending the fine bubbles generated by the pump to the fine bubble jetting port (310); And a control unit.

Further, the micro-bubble generating pump unit 900 includes a multi-stage pump 910 having two or more impellers; An air inlet 920 connected to the inlet pipe of the multi-stage pump 910 to introduce external air; An expansion pipe 930 having an inner diameter larger than an inner diameter of the inflow pipe of the multi-stage pump 910, the inflow pipe 920 being disposed on the inflow side pipe of the multi-stage pump 910 and connected to the air inlet 920; And a micro-bubble generating tank (950) connected to the multi-stage pump discharge pipe, wherein the multi-stage pump discharge pipe is attached to the eccentricity of the micro-bubble generating tank (950).

The air inlet 920 includes an air inlet 921 through which external air flows; An air flow rate control valve 922 connected to the air inlet 921 and capable of opening and closing the air inlet 921 and controlling the flow rate of the air; An air flow meter 923 for measuring the flow rate of the air introduced into the air inlet 921; And a check valve 924 provided on the piping of the air inlet 920 to prevent backflow of the air.

The fine bubble generating tank 950 is formed in a shape combining a hemispherical shape and a cylindrical shape, and a flange is formed on both sides so as to be coupled to or detachable from the cylindrical portion. A perforated plate 952 provided between the flanges; Bubble colliding plate 953 coupled with the perforated plate 952; And a micropore outlet port 954 formed on the central axis of the microbubble generator tank 950 and having a discharge port spaced from the perforated plate 952 by a predetermined distance, And the center thereof is blocked by the size of the outlet pipe (954).

Further, the micro-bubble generating pump unit 900 includes a plurality of branch pipes 955 coupled to the discharge-side pipe of the micro-bubble generating tank 950 at a predetermined distance. And a minute bubble amount regulating valve 956 mounted for each of the branch pipes branched to the branch pipe 955.

The micro bubble generating pump unit 900 is provided with a pipe 955 for branching the branch pipe 955 and a pipe 955 for branching the branch pipe 955, (957) is connected.

The fine bubble jetting ports (310) are provided at the front end and the rear end of the floating air outflow side wall (330).

In addition, the flocculation-outflow side wall 230 includes a water level control ware plate 231 for adjusting the water level according to the variation of the amount of raw water flowing into the flocculation tank 200; And a slant swash plate (232) slidably coupled to the level adjusting wear plate (231) to lift up the dropping collision.

The floatation tank 300 includes a sedimentation portion 340 formed to have a slope in a hopper shape on the bottom between the floatation outflow side wall 330 and the sludge tank 400; And a settling portion drain pipe 350 installed at the bottom of the settling portion 340 and having a plurality of holes formed on the surface of the pipe, In the direction of flow of the exhaust gas.

The sludge scraper portion 500 may be disposed in parallel with the sludge slope portion 410 so as to move in parallel with the sludge slope portion 410 while moving the path of the scraper 540 in parallel with the water surface, A rotation axis 510 is provided to have a section in which the rotation axis 510 is installed and a section in which the rotation axis 510 is parallel to the water surface.

In addition, the treated water discharging portion 710 of the telescopic valve 700 is connected to the outer surface of the treated water discharge pipe.

According to the pressurized floating apparatus using the apparatus for generating reverse vortex micro-bubbles according to an embodiment of the present invention, the generation of coarse bubbles is suppressed, the micro-bubbles of a smaller size are generated, and the sludge is removed.

Further, by using the expansion portion and the multi-stage pump, microbubbles can be generated in two stages.

In addition, by providing a check valve in the air inflow portion, the air suction end portion can be provided adjacent to the multi-stage pump irrespective of the floatation level, and micro bubbles are uniformly generated.

Further, in the microbubble generating tank, microbubbles can be additionally produced in four stages while passing through the microbubble impact shake plate, the perforated plate, and the micro-fine pore outlet pipe.

Further, by providing the branch pipe and the minute bubble amount regulating valve, there is an effect that the minute bubble supply amount can be flexibly operated for each minute bubble supply pipe without affecting the flow rate in the entire pipe.

Further, by providing the micro bubble jetting ports at the front end and the rear end of the floatation outflow side wall, there is an effect that the heavy sludge is sedimented and can not flow like treated water.

In addition, by providing the adjustable wear plate and the slant swash plate, it is possible to prevent the cohesive flakes from being broken or bubbles (scum) being generated.

Further, by providing the settling portion and the settling portion drain pipe, there is an effect that the amount of treated water drained when the heavy sludge settled in the bottom hopper is drained can be reduced.

In addition, since the section provided with the rotation axis in parallel with the sludge slope section and the section provided with the rotation axis parallel to the water surface are provided, warping of the scraper can be prevented.

In addition, since the treated water discharging portion of the telescopic valve is connected to the outer surface of the treated water discharge pipe, the outflow area is increased, and if necessary, the number of telescopic valves is increased.

1 is a conceptual diagram of a pressurized floatation apparatus using a reverse vortex micro-bubble generating apparatus according to an embodiment of the present invention.
Fig. 2 is an exemplary view showing the sludge scraper portion of Fig. 1; Fig.
3 is an exemplary view showing the micro-bubble generating pump unit of FIG. 1;
Fig. 4 is an exemplary view showing the micro-bubble generating tank of Fig. 3; Fig.
FIG. 5 is an exemplary view showing the air inlet of FIG. 3;
FIG. 6 is an exemplary view showing a pipe connected to the minute bubble jetting port of FIG. 1;
Figs. 7 to 8 are exemplary views showing the coagulating bath outlet sidewall of Fig. 1; Fig.
Figure 9 is an exemplary view showing the telescopic valve of Figure 1;

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concept of the term appropriately in order to describe its own invention in the best way. The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention. Further, it is to be understood that, unless otherwise defined, technical terms and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Descriptions of known functions and configurations that may be unnecessarily blurred are omitted. The following drawings are provided by way of example so that those skilled in the art can fully understand the spirit of the present invention. Therefore, the present invention is not limited to the following drawings, but may be embodied in other forms. In addition, like reference numerals designate like elements throughout the specification. It is to be noted that the same elements among the drawings are denoted by the same reference numerals whenever possible.

FIG. 1 is a conceptual diagram of a pressurized floatation apparatus using a reverse vortex micro-bubble generating apparatus according to an embodiment of the present invention, FIG. 2 is an exemplary view showing a sludge scraper unit of FIG. 1, FIG. 5 is an exemplary view showing the air inflow portion of FIG. 3, and FIG. 6 is a cross-sectional view of a pipe connected to the micro bubble jetting port of FIG. FIGS. 7 to 8 are views showing the coagulating bath outlet sidewall of FIG. 1, and FIG. 9 is an exemplary view showing the telescopic valve of FIG. 1. FIG.

1, a pressurized floatation apparatus using a reverse vortex micro-bubble generating apparatus according to an embodiment of the present invention includes a mixing tank 100, an aggregation tank 200, a floating tank 300, a sludge tank 400, a sludge scraper section 500, an efflux tank 600, a telescopic valve 700, and a micro-bubble generating pump section 900.

The mixing tank 100 includes a mixing assistant tank half 110, a mixing tank inlet side wall 120 and a mixing tank outlet side wall 130. The raw water pumped from the external pump flows into the mixing tank 100. The PH and the primary coagulant are introduced do.

Here, the raw water refers to the inflow water that is first introduced into sewage, wastewater, etc., and as the PH composition, caustic soda (NaOH) may be used as a medicament for adjusting the proper pH, and the primary coagulant is a medicament used for primary coagulation Alum (ALUM) and the like can be used.

At this time, respective piping lines for inputting raw water, a PH forming agent, and a primary coagulant are installed, and the raw water, the PH forming agent, and the primary coagulating agent are put into the mixing tank 100 have.

The mixing assistant tear-off unit 110 rotates the impeller located below the water surface to mix the raw water and the medicine.

That is, the mixing tank 100 is a water tank that mixes wastewater and chemicals, and mixes the raw water with chemicals by rotating the mixing tank stirrer at a high speed.

The mixing tank inflow side wall 120 is spaced apart from the side wall into which the raw water flows and is spaced apart from the bottom floor by a certain distance.

The mixing tank outlet sidewall 130 is formed on the side from which the raw water flows out and has a hole through which raw water can pass.

In other words, raw water flows into the lower side of the side wall into which the raw water flows, and raw water flows into the upper side of the side wall from which the raw water flows out. This is to form a flow of fluid in the next process in the state where the raw water and the medicine are mixed when the raw water and the medicine (PH composition agent and primary coagulant) are inputted.

The flocculation tank 200 includes a flocculation assistant tank half 210, a flocculation tank inflow side wall 220 and a flocculation tank side wall 230. In the blending tank 100, raw water mixed with a PH composition and a primary flocculant And a secondary coagulant is introduced.

Here, the secondary coagulant is a drug used for secondary coagulation, and a polymer or the like may be used.

It is preferable to rotate the flocculation assistant holding half 210 of the flocculation tank 200 at a low speed. This is to assist the sludge to coagulate as a bundle of soymilk, and it is the first solid-liquid separation process.

The coagulation assistant half cycle unit 210 rotates the impeller located below the water surface to mix the raw water and the medicine.

At this time, it is preferable that the impeller mounted on the coagulation assistant capping unit 210 uses a larger impeller than the impeller mounted on the mixing assistant capping unit 110.

The flocculating tank inflow side wall 220 is spaced apart from the mixing tank inflow side wall 130 by a predetermined distance and spaced apart from the bottom floor by a predetermined distance.

The coagulation bath outlet sidewall 230 is formed on the side from which the raw water flows out, and has a hole through which raw water can pass.

In other words, raw water flows into the lower side of the side wall into which the raw water flows, and raw water flows into the upper side of the side wall from which the raw water flows out. This is to ensure that, when the raw water and the chemical (secondary coagulant) are introduced, the flow of the fluid is formed in the next process in the state where the raw water and the chemical are mixed.

The float tank 300 includes raw water mixed from the flocculation tank 200 to the secondary flocculant and flows through the microbubbles opening 310, the floatation inflow side wall 320 and the floatation outflow side wall 330, The sludge agglomerated by the fine bubbles injected from the fine bubble jetting ports 310 is floated to the water surface.

The flotation tank 300 floats the sludge using fine bubbles.

The fine bubble jetting ports 310 are provided at the bottom to introduce fine air.

The floating tank inflow side wall 320 is spaced apart from the flocculation tank inflow side wall 230 by a predetermined distance, and is spaced apart from the bottom floor by a predetermined distance.

The floatation outflow side wall 330 is spaced apart from the float inflow side wall 320 by a predetermined height from the bottom.

In other words, raw water flows into the lower side of the side wall into which the raw water flows, and raw water flows into the upper side of the side wall from which the raw water flows out. This is to cause the sludge to float by micro-bubbles when the sludge is generated by the injected medicine, and to pass only the sludge that has been floated.

At this time, the floatation outflow side wall 330 may be characterized in that the upper portion thereof is bent at a certain angle in the flow direction of the fluid. This is to reduce the factors that impede the flow of the fluid.

The sludge tank 400 is formed at a distance from the bottom of the sludge tank 400. The sludge tank 400 is formed in a shape of a plate having a height higher than the height of the water surface into which the raw water flows, (410).

That is, the height of the sidewall into which the raw water flows is set to be higher than the height of the water surface, and the sludge is removed from the sludge tank 400 by using a scraper described below so that the raw water flows to the sludge tank 400 It is to minimize.

In addition, the raw water from which the sludge has been removed flows through the lower portion of the sludge tank 400 to the outflow tank.

The sludge swelled in the sludge tank 400 is discharged to the outside through a dehydration process, but can be passed to a dehydration process through a sludge storage tank 800, which is a temporary storage before dehydration. This is because dewatering a small amount of sludge consumes a large amount of energies, so that a proper amount of sludge is collected and then passed to the dehydration process. If the sludge stored in the sludge storage tank 800 is left for a long time, there is a problem that it remains in a solid-liquid separation state and it is difficult to pass it to the dehydration process by using a pump. Therefore, .

2, the sludge scraper portion 500 of the pressurized floatation apparatus using the reverse vortex type microbubble generator according to an embodiment of the present invention includes a rotating shaft 510, a sprocket 520, a chain 530, And a scraper 540. The sludge tank 400 is installed at a certain distance from the sludge tank 400 above the water surface of the float tank 300.

A plurality of rotation shafts 510 are installed in a direction perpendicular to the traveling direction of the raw water.

Sprockets 520 are provided on both sides of the rotating shaft 510.

The chain 530 is connected to wrap the sprockets 520, which are located on a straight line parallel to the traveling direction of the raw water.

The scraper 540 is horizontally connected to the chain 530 with the rotation shaft 510.

That is, the scraper 540 is used to remove the sludge floated in the floating tank 300 by the sludge tank 400. The chain 530 is connected to the sprocket 520 and the sprocket 520 is rotated so that the scraper 540 connected to the chain 530 rotates in an elliptical shape to move the sludge floated in the floating tank 300 And is squeezed by the sludge tank 400.

In the outflow tank 600, raw water having passed through the lower portion of the sludge tank 400 flows into the sludge tank 400, and the lower surface and side surfaces of the sludge tank 400 are closed.

The raw water flowing into the outflow tank 600 is raw water from which the sludge has been removed, and the raw water from which the sludge has been removed is called the treated water, and the treated water is discharged to the outside. When treated water is water quality suitable for discharge to rivers and the like, it is also referred to as filtered water.

That is, the pressurized floatation apparatus using the retro-vortex micro-bubble generating apparatus according to an embodiment of the present invention can be used at the final stage before discharge.

The telescopic valve 700 includes a hopper-shaped process water discharge portion 710 connected to an outlet of a process water discharge pipe spaced a predetermined distance from the lower surface of the outflow tank 600. The process water discharge portion 710, Can be adjusted.

That is, the telescopic valve 700 is used to discharge the treated water stored in the outflow tank 600 to the outside, and the treated water discharge portion 710 of the telescopic valve 700 is connected to the upper portion of the outflow tank 600 When the water surface is raised to the upper part of the treated water discharging part 710, the treated water on the outflow tank 600 flows into the treated water discharging part 710, and the treated water discharging part 710 And is discharged to the outside along the connected piping.

The micro bubble generating pump unit 900 is connected to the micro bubble jetting port 310 and sends the micro bubbles generated by the pump to the micro bubble jetting port 310.

Here, the microbubbles refer to bubbles of 30 microns or less, and it is preferable to generate microbubbles of 10 microns or less. Hereinafter, a portion for generating minute bubbles of 10 microns or less will be described.

3, the micro-bubble generating pump unit 900 of the pressurized floatation apparatus using the reverse vortex micro-bubble generating apparatus according to an embodiment of the present invention includes a multi-stage pump 910, an air inlet 920, The expansion pipe 930 and the micro bubble generating tank 950. The discharge side pipe of the multistage pump is connected to the eccentricity of the micro bubble generating tank 950. [

The upper part of a general micro-bubble generating tank is formed by a bundle of bubbles having a size of about 10 mm or more and collects at the upper part and is intermittently blown out during operation. In particular, since the blow- In order to improve what is present,

The pressurized floating apparatus using the apparatus for generating reverse vortex micro-bubbles according to an embodiment of the present invention generates a centrifugal force vortex by connecting the discharge side pipe of the multi-stage pump to the eccentricity of the micro-bubble generating tank 950, It is possible to prevent large bubbles from collecting or remaining on the upper part of the bubble generating tank. Here, the term " connecting to eccentricity " refers to connecting to one side by shifting away from the central axis (refer to Figs. 3 to 4)

The multi-stage pump 910 has two or more impellers, for example, a multi-stage volute pump.

At this time, since the multi-stage pump 910 normally sucks air, residual air exists in the pressure pump, and an automatic air vent is attached to an upper portion of the pump to prevent a vibration phenomenon (cavitation phenomenon) .

The air inlet 920 is connected to the inlet pipe of the multi-stage pump 910 to introduce external air.

The expansion portion 930 is provided on the upstream side of the inflow pipe of the multi-stage pump 910 to which the air inflow portion 920 is connected and has an inner diameter larger than the inner diameter of the inflow pipe of the multi-stage pump 910 .

The turbulence (vortex) generated by the expansion pipe formed on the suction side pipe of the multi-stage pump 910 comes into contact with the air and the air is scattered, so that the primary minute bubbles can be generated. In order to further reduce the size of the generated minute bubbles, the air is scattered by the rotation of the multi-stage impeller, whereby secondary fine bubbles can be generated.

That is, the micro-bubble generating step of two stages is performed before entering the micro-bubble generating tank.

The fine bubble generating tank 950 is connected to the multi-stage pump discharge pipe.

As shown in FIG. 4, the micro-bubble generating tank 950 of the pressurized floatation apparatus using the reverse vortex micro-bubble generating apparatus according to an embodiment of the present invention is formed into a hemispherical shape and a cylindrical shape, And a micro-bubble impingement plate 953 and a micro-sample port 954, wherein the micro-bubble impingement plate 953 and the micro-bell micro-baffle 954 are formed on both sides of the perforated plate 952, 952) may be closed at the center of the micro-scale port (954).

The perforated plate 952 is clogged to a predetermined size in the center, and is provided between the flanges.

It is preferable to block the center of the perforated plate 952 for bubble separation by the size of the discharge pipe to protect the reverse vortex in the minute bubble generating tank 950 (see FIG. 4).

The fine bubble impact shake plate 953 is engaged with the perforated plate 952.

The micro-scale photoreceptor pipe 954 is spaced from the perforated plate 952 by a predetermined distance on the center axis of the micro-bubble generating tank 950 to form a discharge port.

The fluid that has undergone the micro-bubble generating step in the second step before flowing into the micro-bubble generating tank 950 flows into the eccentricity of the micro-bubble generating tank 950, thereby rotating by the cyclone phenomenon, Bubbles collide with the fine bubble impacting plate 953, and the third minute bubbles can be generated by the collision.

Thereafter, the fluid can pass through the perforated plate 952 and generate fourth-order minute bubbles.

The fluid that has moved to the end of the micro bubble generating tank 950 can not advance any further, and travels on the outside of the micro-sample outlet pipe 954, so that a reverse vortex is generated to generate the fifth minute bubbles . This is because the micro-scale photo-exhaust pipe 954 enters the rear end of the perforated plate 952 located at the center along the center axis of the tank.

The fluid that has moved to the inlet of the micro-scale photoreceptor pipe 954 turns again and moves to the micro-photoreceptor pipe 954. When the micro-photoreceptor pipe 954 is compared with the micro-bubble generating tank 950 It becomes narrower and the speed becomes faster, so that sixth minute fine bubbles can be generated.

The above-described primary microbubbles to the sixth microbubbles mean that the remaining coarse bubbles can be made into microcapsules if the coarse bubbles remain. Where coarse bubbles mean bubbles greater than 30 microns.

5, the air inlet 920 of the pressurized floatation apparatus using the reverse vortex micro-bubble generator according to an embodiment of the present invention includes an air inlet 921, an air flow rate control valve 922, An air flow meter 923 and a check valve 924. [

The air inlet 921 introduces outside air.

The air flow control valve 922 is connected to the air inlet 921 to control the opening and closing of the air inlet 921 and the flow rate of the air.

The air flow meter 923 measures the flow rate of the air introduced into the air inlet 921.

A check valve 924 is provided on the piping of the air inlet 920 to prevent backflow of air.

Generally, in order to suck air which is the supply source of fine bubbles, the air suction end is installed at a height of about 1 m than the float level to prevent reverse flow of the wastewater. Therefore, the pressurizing pump sucks air When the waste water is filled in the air piping of about 3.5m in height and sucked in air first, the suction amount of the air is inhomogeneous due to the suction of the air, the size of the minute bubbles is irregular or the minute bubbles are completely eliminated, There was a problem in the water treatment performance.

In order to solve this problem, the air suction end of the air pipe can be installed adjacent to the multi-stage pump 910 regardless of the float level by attaching a check valve 924, which is a check valve 924 having a small pressure loss, To be uniformly generated.

The check valve is specially manufactured so that it can be opened even at a small pressure so as not to place a burden on the pressure loss of the pressure pump.

6, the micro-bubble generating pump unit 900 of the pressurized floatation apparatus using the reverse vortex type micro-bubble generating apparatus according to an embodiment of the present invention includes a branch pipe 955 and a minute bubble amount regulating valve 956).

The branch pipe 955 is connected to the discharge side pipe of the micro bubble generating tank 950 at a predetermined distance and may be provided in a plurality of pipes. Here, the branch pipe 955 may be a pipe connected to a general pipe, or may be branched by using a T pipe.

At this time, it is preferable to determine the pipe size so that the cross sectional area sum of all branch pipes is similar to the cross sectional area of the pipe before branching so that the branch pipe 955 does not affect the flow rate in the entire pipe.

The minute bubble amount regulating valve 956 may be installed for each pipe branching to the branch pipe 955.

This means that the amount of fine bubbles to be injected is controlled flexibly for each fine bubble supplying tube.

The micro bubble generating pump unit 900 is provided with at least one tea tube 957 having the same size as the piping branched to the branch pipe 955 and the inflow and outflow pipes for each piping branched to the branch pipe 955 ) Are connected to each other.

By doing so, the flow rate can be reduced to half. This is because if the diameter of the micro-bubble jetting port 310 for spraying the micro-bubbles at the lower portion of the floating tank 300 is decreased, the flow rate of the micro-bubbles may be increased, In order to improve the biased phenomenon, the generated minute bubbles are reduced in flow velocity and can be quietly spread out over the full width of the float. To increase the number of tubes 957 used, the flow velocity is made slower, The microbubbles can be uniformly sprayed on the surface.

The fine bubble jetting ports 310 may be provided at the front end and the rear end of the floating jet outlet sidewall 330.

In general, when the fine bubbles are injected into the inflow portion of the floating tank 300, the flow rate of the sludge floated by the fine bubbles becomes about 3.5 times larger at the central portion of the float tank 300, In order to prevent such a problem, fine sludge is installed at the rear end of the floatation outflow side wall 330 to raise the floatation efficiency by floating the sludge to be sedimented again. .

7 to 8, the flocculation outlet sidewall 230 of the pressurized floatation apparatus using the reverse vortex micro-bubble generating apparatus according to an embodiment of the present invention includes the water level control wear plate 231 and the slip- (Not shown).

The water level control wear plate 231 can adjust the water level according to the variation of the amount of raw water flowing into the flocculation tank 200.

That is, the height of the water level control wear plate 231 can be adjusted to adjust the water level.

The slip swash plate 232 is coupled to the water level control plate 231 in an inclined manner to lift up the dropping collision.

The sludge agglomerated in the flocculating tank is disadvantageous in that flocculation of flocculated flocculant occurs when there is a collision due to a too high flow rate or falling speed, and bubbles (scum) are generated when supplied from a flotation tank. And a slip swash plate for eliminating the falling collision can be constituted to minimize the generation of bubbles (scum) due to falling.

The floating tank 300 further includes a settling portion 340 and a settling portion drain pipe 350,

The size of the holes formed in the settling portion drain pipe 350 may be smaller toward the flow direction of the fluid.

The settling portion 340 is formed to have a slope in the form of a hopper on the bottom between the floatation outflow side wall 330 and the sludge tank 400.

The settling portion drain pipe 350 is installed at the bottom of the settling portion 340, and a plurality of holes are formed on the surface of the pipe.

In order to improve the drainage of unnecessary large amount of treatment water together with the drainage of the sludge which is heavily heavy in part, the sludge drainage pipe 350 is put in the full width of the bottom of the sedimentation part 340, A hole (OPEN) is formed on the lower side of the pipe 350, and a large hole is formed on the drain side opposite to the small hole so that the sludge settled on the floor can be drained uniformly.

2, the sludge scraper portion 500 of the pressurized floatation apparatus using the reverse vortex micro-bubble generating apparatus according to an embodiment of the present invention moves the moving path of the scraper 540 in parallel with the water surface The sludge slope part 410 and the sludge slope part 410 so as to be parallel to the sludge slope part 410. The sludge slope part 410 is provided with a rotation shaft 510, 510) are installed.

When the scraper 540 rolls the sludge along the inclined plane of the sludge slope on the water surface, the rubber plate on the end of the scraper must be squeezed while bending the inclined plate by using one sprocket. Therefore, when the rubber plate is bent and spread, The sludge slope part 410 is provided with a rotation axis 510 in parallel with the sludge slope part 410. The sludge slope part 410 is provided with a rotation axis 510 parallel to the sludge slope part 410. In order to solve the problem of chain breakage and motor life shortening, And at least two rotating shafts) and a section in which the rotating shafts 510 (at least two rotating shafts are provided) are provided in parallel with the water surface. In FIG. 2, four rotary shafts 510 are provided. However, it is also possible to have a larger number of rotary shafts, and at least three rotary shafts (the lower left in FIG. 2, the lower right, It can be implemented with only three axes).

9, the treated water discharging portion 710 of the telescopic valve 700 of the pressurized floatation equipment using the reverse vortex type microbubble generator according to the embodiment of the present invention is connected to the outer surface of the treated water discharge pipe .

The floatation level should be maintained to a certain level on the sludge discharge slope in order to remove the floatation sludge to an appropriate concentration. In order to improve fluctuation of floatation level due to fluctuation of inflow water, the telescopic valve (700) The outflow area can be increased by constituting the treatment water discharge part 710 outside the discharge part 710 and a plurality of the telescopic valves 700 can be provided if necessary to minimize the water level fluctuation of the floating tank 300 .

When the raw water flows into the floatation tank 300 from the flocculation tank 200 into one passage or two passages, the flow rate of the inflow gas is increased to only a portion thereof, So that the flotation efficiency is lowered, so that the flotation tank 300 is allowed to flow through the entire width of the flotation tank 300, thereby maximizing the contact rate with the microfilm.

Since the treated water separated in the floating tank 300 can flow along with the floating sludge and settling sludge as the flow velocity increases at the bottom portion of the water bottom portion, it is preferable that the flow velocity is made as low as possible And the flow velocity of the entire width of the floating tank 300 is preferably uniform.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: mixing tank
110: Mixing assistant semester 120: Mixing tank inlet side wall
130: mixing tank outlet side wall
200: Coagulation tank
210: coagulation assistant semipermeable period 220: flocculating tank inflow side wall
230: Coagulation bath outlet side wall
231: Water level control plate 232: Slip swash plate
300: Flotation tank
310: fine bubble jetting port 320: floating tank inflow side wall
330: floating tank outlet side wall 340:
350: Settling portion drain piping
400: sludge tank
410: Sludge slope part
500: sludge scraper portion
510: rotating shaft 520: sprocket
530: chain 540: scraper
600: Spillway
700: Telescopic valve
710:
800: Sludge storage tank
900: Micro bubble generating pump unit
910: Multistage pump 920: Air inlet
921: Air inlet 922: Air flow control valve
923: Air flow meter 924: Check valve
930: Expansion part 950: Micro bubble generating tank
952: Perforated plate
953: Micro-bubble impact shaking plate 954: Micro-scale phototaking pipe
955: branch pipe 956: minute bubble amount regulating valve
957: Tin Can

Claims

A mixer assistant half 110 for introducing the raw water pumped from the external pump, introducing a PH composition and a primary coagulant, and rotating the impeller below the water surface to mix the raw water and the medicament, And a mixing bath outlet side wall (120) spaced a predetermined distance apart from the bottom floor by a predetermined distance, and a mixing bath outlet side wall (130) formed on the side from which raw water flows and having a hole through which raw water can pass, (100);
A flocculation assistant half 210 for introducing raw water mixed with the PH forming agent and the primary flocculating agent into the mixing tank 100 and injecting the secondary flocculating agent and rotating the impeller located below the water surface to mix the raw water and the chemicals, A flocculating tank inflow side wall 220 spaced a certain distance from the mixing tank outlet sidewall 130 and spaced apart from the bottom floor by a predetermined distance and a flocculating tank inflow side wall 220 formed on the side where the raw water flows out, A flocculating bath (200) including a side wall (230);
The raw water mixed from the flocculation tank 200 to the secondary flocculant flows into the bottom of the flocculation tank 200 and flows into the bottom of the flocculation tank 200. A floatation inflow side wall 320 spaced apart from the floatation inflow side wall 320 and a floatation outflow side wall 330 spaced from the float inflow side wall 320 by a predetermined distance from the bottom, A floating tank 300 for floating the sludge flocculated by the injected minute bubbles to the water surface;
And a sludge slope part 410 formed in a shape of a plate and inclined to the outside of the sidewall into which the raw water flows, A sludge tank 400;
A plurality of rotating shafts 510 installed at a predetermined distance from the sludge tank 400 at the upper part of the water surface of the floatation tank 300 and installed in a direction perpendicular to the traveling direction of the raw water, A chain 530 connected to wrap the sprockets 520 positioned on a straight line parallel to the traveling direction of the raw water and a scraper 540 horizontally connected to the chain 530, A sludge scraper portion (500) comprising:
An outflow tank 600 into which raw water having passed through a lower portion of the sludge tank 400 flows, and a lower surface and a side surface of the sludge tank 400 are closed;
And a hopper-shaped treatment water discharge portion 710 connected to an outlet of the treatment water discharge pipe provided at a predetermined distance from the lower surface of the outflow bath 600. The height of the treatment water discharge portion 710, A valve 700; And
A fine bubble generating pump unit 900 connected to the fine bubble jetting port 310 to send the fine bubbles generated by the pump to the fine bubble jetting port 310;
Lt; / RTI >
The micro-bubble generating pump unit 900 includes:
A multi-stage pump 910 having two or more impellers;
An air inlet 920 connected to the inlet pipe of the multi-stage pump 910 to introduce external air;
An expansion pipe 930 having an inner diameter larger than an inner diameter of the inflow pipe of the multi-stage pump 910, the inflow pipe 920 being disposed on the inflow side pipe of the multi-stage pump 910 and connected to the air inlet 920; And
A micro-bubble generating tank 950 connected to the discharge pipe of the multi-stage pump 910;
, &Lt; / RTI &
The discharge pipe of the multi-stage pump 910 is attached to the eccentricity of the minute bubble generating tank 950,
The turbulent flow generated by the expansion pipe formed in the suction side pipe of the multi-stage pump 910 comes into contact with the air and the air is scattered to generate the primary minute bubbles and the air is scattered by the rotation of the multi- Stage pump 910 and discharges it to the discharge pipe of the multi-stage pump 910,
The micro-bubble generating tank 950
A flange is formed on both sides so as to be coupled to or detachable from the cylindrical portion,
A perforated plate 952 provided between the flanges, the center being closed to a predetermined size;
Bubble colliding plate 953 coupled with the perforated plate 952; And
A micro-scale photoreceptor pipe 954 having a discharge port spaced from the perforated plate 952 by a predetermined distance on the central axis of the micro-bubble generating tank 950;
&Lt; / RTI >
The fluid having undergone the micro-bubble generating step in the two stages before flowing into the micro-bubble generating tank 950 flows into the eccentricity of the micro-bubble generating tank 950, thereby colliding with the micro-bubble impact shake plate 953, The third minute bubbles are generated by the collision vibration,
Wherein the perforated plate (952) is closed at the center of the micro-scale photo-exhaust pipe (954).

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The method according to claim 1,
The air inlet (920)
An air inlet 921 through which external air flows;
An air flow rate control valve 922 connected to the air inlet 921 and capable of opening and closing the air inlet 921 and controlling the flow rate of the air;
An air flow meter 923 for measuring the flow rate of the air introduced into the air inlet 921; And
A check valve 924 provided on the pipe of the air inlet 920 to prevent backflow of air;
Wherein the pressurized flotation apparatus comprises a reverse vortex micro bubble generator.

delete

The method according to claim 1,
The micro-bubble generating pump unit 900 includes:
A plurality of branch pipes 955 coupled to the discharge side pipe of the microbubble generation tank 950 at a predetermined distance; And
A minute bubble amount regulating valve 956 mounted for each of the pipes branched to the branch pipe 955;
Further comprising a reverse vortex micro bubble generator.

6. The method of claim 5,
The micro-bubble generating pump unit 900 includes:
For each pipe branched to the branch pipe 955,
Wherein at least one tea tube (957) having the same size as the inlet pipe and the outlet pipe is connected to the pipe branching to the branch pipe (955).

The method according to claim 1,
The fine bubble jetting ports 310
And is provided at a front end and a rear end of the floating tank outlet side wall (330).

The method according to claim 1,
The coagulation bath outlet sidewall 230
A water level control wear plate 231 for adjusting the water level according to the variation of the amount of raw water flowing into the flocculation tank 200; And
A slip swash plate 232 coupled to be inclined to the water level control wear plate 231 to lift up the drop collision;
Wherein the pressurized flotation apparatus comprises a reverse vortex micro bubble generator.

The method according to claim 1,
The floating tank 300 is
A sedimentation part 340 formed to have a slope in the form of a hopper on the bottom between the floatation outflow side wall 330 and the sludge tank 400; And
A settling portion drain pipe 350 installed at the bottom of the settling portion 340 and having a plurality of holes on the surface of the pipe;
, &Lt; / RTI >
Wherein the size of the hole formed in the settling portion drain pipe (350) is formed to be smaller toward the flow direction of the fluid.

The method according to claim 1,
The sludge scraper portion 500
A section where the rotating shaft 510 is installed in parallel with the sludge slope part 410 to move the moving path of the scraper 540 in parallel with the water surface and in parallel with the sludge slope part 410, Wherein the rotary shaft (510) is installed to have a section in which the rotary shaft (510) is installed in parallel.

The method according to claim 1,
The treated water discharging portion 710 of the telescopic valve 700
Wherein the first and second flow passages are connected to the outer surface of the process water discharge pipe.