KR20060024728A - The cylindrical reactor in a body for dissolving ozone in water and separating sludge by floatation - Google Patents

Abstract

The present invention relates to ozone disinfection and floating separation integrated double-cylinder reaction tank using ozone to disinfect and treat water.

The reaction tank of the present invention includes: an outer flotation tank 21 in which a funnel-shaped base 21B extends from the lower end of the cylindrical outer wall 21A; Floating sludge scraper 22 coupled to the upper inner diameter of the outer flotation tank 21; A downwardly open inner reactor 23 made up of an inner wall 23B which is erected downwardly at the rim of the disc-shaped inner upper plate 23A positioned directly below the floating sludge scraper 22; An ozone supply pipe 24 having one side end bent downward after penetrating the upper one side of the outer wall 21A and penetratingly coupled to a central portion of the inner upper plate 23A; A raw water supply pipe 25 having one side end bent upward from the center of the inner diameter portion after being coupled through the lower side of the outer wall 21A; It is composed of an unreacted ozone collection tank 26 to block the upper portion of the outer floating separation tank 21 from the outside.

The reaction tank of the present invention has the advantage that the ozone disinfection and flotation separation is made in one reactor, not only the ozone reaction and the flotation separation efficiency are significantly improved, but also the installation area is significantly reduced.

Ozone disinfection, flotation,

Description

The cylindrical reactor in a body for dissolving ozone in water and separating sludge by floatation             

1 is a block diagram of a conventional general ozone disinfection device.

Figure 2 is an embodiment of the present invention ozone disinfection and flotation separation integrated double cylindrical reactor.

          ((Explanation of symbols for main part of drawing))

        11. Ozone Generator 12. Ozone Reactor

        13. Ozone processor 14. Supervisory controller

        15. Flotation Separation Reactor 21. Outer Flotation Separation Tank

        22. Sludge Sludge Scraper 23. Inner Reactor

        24. Ozone supply piping 25. Raw water supply piping

        26. Unreacted ozone collection tank 27. Slope plate

The present invention relates to a high-efficiency ozone disinfection and floating separation-integral double cylindrical reaction tank capable of disinfecting water using ozone, and more particularly, to disinfecting the reaction tank as a double wall structure in which an inner reaction tank is coupled to the inside of the outer floating separation tank. The raw water to be treated is fed upward from the lower part of the center of the inner reaction tank to the upper side, and ozone is injected downward from the upper part of the inner reaction tank to form a countercurrent, and the raw water mixed with ozone is the inner reaction tank at the center of the inner reaction tank. After moving downward along the inner circumferential surface of the inner wall of the outer wall to be discharged through the lower portion of the outer floating separation tank, the unreacted ozone and floating sludge is moved upward by buoyancy among the raw water filled in the space between the inner and outer walls. Unreacted ozone is unreacted ozone bound to the top of the outer flotation tank. By collecting them in the collection tank and allowing the sludge to be discharged after being injured on the surface of the water, the contact time between ozone and raw water is increased to increase the disinfection efficiency by ozone and to effectively separate and remove various suspended substances generated in the disinfection process. The present invention relates to an ozone disinfection and floating separation integrated double cylindrical reactor.

The process of purifying raw water taken from a water supply source to obtain drinking water generally consists of a series of sequential processes called sedimentation, filtration and disinfection. The sedimentation process usually involves precipitation and coagulant, which naturally sink the contaminants in the sedimentation basin depending on the water quality. There is a chemical precipitation, which is injected into water to obtain more than the normal precipitation, and in the final step, it is disinfected with chlorine and then drained.

However, due to rapid industrialization and concentration of population in a limited area, pollution of drinking water is getting serious, and traces of organic chlorine compounds produced by reaction of organic matter in raw water and chlorine in the water purification process Because it can have a fatal adverse effect on the body, a review of the whole water treatment including chlorine treatment is being conducted.

In addition, in order to protect the water source, the sewage treatment plant upstream of the water source disinfects the treated water and discharges it, and in the case of general disinfection, chlorine is used in the current situation, such a problem is more serious.

In order to solve the problem of the disinfection method using chlorine as described above, a method for including pre-ozone treatment or post-ozone treatment in a new water purification process, which is a new water purification treatment method, has been studied as a national problem. Bar and ozone disinfection method is conventionally carried out as follows.

As shown in FIG. 1, a conventional general apparatus for performing disinfection by ozone includes an ozone generator 11, an ozone reactor 12, an ozone processor 13, a monitoring controller 14, and a floating separation reactor. (15), a fine ozone air injector (16), turbine stirring method, radian method, according to the method of injecting ozone into the ozone reaction tank so that the ozone produced in the ozone generator reacts effectively with the raw water in the ozone reactor. As it is classified into the porous diffuser method and the injector method, the turbine agitation type is rarely used in recent years because of excessive consumption of power and difficult maintenance, and the radian method is an improvement of the turbine agitation type. It is suitable when the water quality is poor and the height of the water tank is higher than a certain level together with the stirring type.

In addition, the porous diffuser method has the advantage that no power is required, but when the height of the water tank is low, the efficiency is very low, and in the case of the injector method, the water tank is low and the head pressure is suitable for a small contact point.

Among the various methods described above, the most suitable method may be applied to the actual site, but the most important thing is to increase the contact reaction efficiency of ozone injected into the water as much as possible. It is more desirable to maximize the gas-liquid contact area, to extend the gas-liquid reaction time, and to make the gas and liquid countercurrent.

However, in the conventional ozone disinfection facility, the square (square) ozone reaction tank 12 has a structure in which a plurality of small reaction tanks are arranged, so that the ozone bubbles reacted with the raw water in the primary small reaction tank are increased in size. By moving to the 2nd and 3rd small reactors, the reaction efficiency rapidly decreases, thus increasing the amount of ozone injected, and increasing the size of the ozone bubble, which increases the amount of unreacted ozone and collects and treats it. Since the capacity of the ozone processor 13 must also be increased, there is a problem that the overall equipment investment cost, operating cost, etc. rises more than necessary.

And, as described above, the raw water that has been sterilized by ozone in the ozone reaction tank 12 is discharged in a state in which sludge which is injured or precipitated after being supplied to the flotation separation tank 15 is removed. I have the following problem.

Conventional floating separation tank is generally in the form of a rectangle such as the ozone reaction tank, the raw water supplied from the ozone reaction tank is introduced into the upper front end side of the floating separation tank and discharged through the lower rear end side.

Therefore, the ozone contained in the raw water moves rearward while descending from the upper side to the lower side along with the raw water from the front end of the flotation tank to the adjacent distance, but is rapidly discharged to the upper side as it proceeds, and then discharged. This is a bubble flow line (F) of FIG.

As described above, the ozone bubbles contained in the raw water are quickly discharged from the raw water being separated from the flotation, so that the unreacted area of the ozone bubble is generated at the bottom and rear of the flotation separation tank, and the volume of the non-reaction zone is a substantial part of the phase separation tank. As a result, the flotation efficiency decreases and ozone consumption increases.

In addition, since the rectangular ozone reaction tank and the floating separation tank are arranged in a series of orders, the area occupied by the facility is too large.

The present invention was devised to solve all the problems of the conventional ozone disinfection facility, and it is possible to drastically reduce the size of the facility by treating the ozone disinfection and flotation processes in one process, and to use ozone. It is an object of the present invention to provide an integrated reactor that can maximize efficiency.

This object of the invention is achieved by a double wall structure and countercurrent.

The ozone disinfection and floating separation integrated double cylindrical reaction tank of the present invention has a structure in which ozone disinfection and sludge flotation and separation are simultaneously performed in one reaction tank having a circular cross section, and the reaction tank is located at the center of an upward open type outer floating separation tank having a cylindrical outer wall. It is in the form of a double wall having a cylindrical inner wall and combined with an upwardly closed and downwardly open inner reactor.

In addition, the two side walls constituting the outer flotation separation vessel and the inner reaction vessel respectively coincide with the central axis thereof, the lower end of the inner wall of the inner reaction vessel is a structure floating in the space inside the outer flotation separation vessel, the reaction is completed in the inner reaction vessel Raw water is stored in the treated water storage tank through the lower outlet of the outer wall of the outer flotation tank and then discharged to the outside.

At this time, the water level of the raw water to be filled in the outer floating separation tank by the water level of the treated water storage tank reaches its upper end.

That is, since the reaction tank of the present invention has a higher position of the open upper end of the outer floating separation tank than the closed upper end of the inner reaction tank, the water level inside the reaction tank is distinguished from the level of the outer couple phase separation by the level of the inner reaction tank. It becomes an inner ceiling surface, and the level of the outer flotation tank becomes the upper end of the outer flotation tank higher than the ceiling surface of the inner reaction tank.

Therefore, the raw water and the ozone supplied to make the countercurrent to the inner center of the inner reaction tank is discharged to the treated water storage water while the reaction with ozone is completed through the lower outlet of the outer flotation tank outside the lower end of the inner reaction tank. Sludge and unreacted ozone produced in the reaction with the outside of the lower end of the inner reactor along the flow of raw water to the outlet.

However, unreacted ozone and flotation sludge are not discharged through the outlet by buoyancy as soon as they leave the lower end of the inner wall of the inner reaction tank, and among the raw water filling the space formed between the inner wall outer circumference of the inner reaction tank and the inner wall of the outer wall of the outer flotation separation tank. It floats and moves upward to the upper end of the outer flotation tank.

At this time, the unreacted ozone moving out of the inner reaction tank together with the sludge floating in the outer flotation tank is discharged through the water surface of the raw water reaching the upper part of the outer flotation tank, and then discharged through the upper part of the inner flotation tank of the upward open type. In order to collect unreacted ozone without directly discharging it to the outside, an unreacted ozone collecting tank is coupled to the upper portion of the outer floating separation tank, and the unreacted ozone collected here is discharged through an outlet provided at one side of the unreacted ozone collecting tank. After treatment in the pretreatment processor, it is discharged to the outside.

And, the sludge produced in the raw water, can be divided into sludge floating in the raw water and the sludge settled, the flotation sludge is collected to one side by the flotation sludge scraper coupled to the upper end of the inner diameter of the outer wall of the outer flotation separation tank of the outer flotation separation tank Discharged through the upper outer wall, the sedimentation sludge is discharged to the outside through the center of the lower end of the funnel-shaped base extending downward from the lower end of the outer wall of the outer flotation tank.

As described above, the ozone disinfection and floating separation integrated double-cylinder reaction apparatus of the present invention allows the two materials to react by contact by mixing and contacting raw water and ozone supplied in a countercurrent in the inner reaction tank at the center of the inner reaction tank.

Further, as described above, the raw water undergoing the contact reaction is moved downward from the center portion of the inner reaction tank to the lower end side, and then discharged from the lower portion of the inner reaction tank to the lower portion of the outer floating separation tank, and the space between the inner reaction tank and the outer floating separation tank. By allowing unreacted ozone and flotation sludge to move upward, not only does it increase the contact time of ozone and raw water, but also prevents the unreacted zone of raw water and ozone from occurring when the ozone is discharged. It will increase the utilization rate.

Details of the effects and the resulting effects, including the object and technical configuration of the present invention will be clearly understood by the following description with reference to the drawings showing a preferred embodiment of the present invention.

Figure 2 shows a schematic diagram of an embodiment of the present invention ozone disinfection and floating separation integrated double cylindrical reactor.

The apparatus of the present invention has a cylindrical outer wall (21 A), each of which is equipped with a floating sludge discharge port (D _{S 1} ) and a treated water discharge port (D _W ) at each of the upper and lower sides thereof, so that the diameter gradually decreases from the lower end of the outer wall (21 A). An upward open outer floating separation tank 21 formed downwardly and having a funnel-shaped base 21B provided with a settling sludge discharge port D _{S 2} at a lower end thereof;

Injury to be coupled to the upper inner diameter of the outer wall (21A) of the outer flotation separation tank 21 to scrape the sludge (S ₁ ) injured in the raw water (W) to discharge to the outside through the flotation sludge outlet (D _{S 1} ) A sludge scraper 22;

Upright at the edge of the inner top plate 23A so as to have a disc-shaped inner top plate 23A positioned directly below the floating sludge scraper 22 and the same central axis as the outer wall 21A of the outer float separation tank 21. An inner reaction vessel 23 formed of a cylindrical inner wall 23B which forms a ring-shaped space R between the outer wall and the outer wall 21A;

Ozone penetrates through the upper side of the outer wall 21A of the outer flotation separation tank 21 and extends to the center of the inner diameter portion, and the one side end that is bent downward is penetrated and coupled to the center of the inner upper plate 23A of the inner reaction tank 23. A supply pipe 24;

It is penetrated and coupled to one side of the lower side of the outer wall 21A located below the lower end of the inner wall 23B of the inner reactor 23, and one side end extends to the center of the inner wall of the outer wall, and then upwardly bent toward the central side of the inner reactor 23. Raw water supply pipe 25;

The outer floating separation tank 21 is coupled to the upper outer peripheral surface of the outer wall (21A) to block the upper portion of the outer floating separation tank 21 immediately above the floating sludge discharge port (D _S1 ) with the outside, unreacted ozone outlet (D _O ) on one side It is composed of an unreacted ozone trap (26) provided.

Looking again at the method of operating the device of the present invention configured as described above are as follows.

Raw water subject to ozone disinfection is supplied upward from the center of the inner reactor 23 through the raw water supply pipe 25 through a pretreatment process, etc. to fill the inside thereof, and ozone produced by the ozone generator 11 It is injected downward into the raw water from the inner upper end of the inner reaction vessel 23 is in contact with the mixture at the center of the inner reaction vessel with the circumference.

Then, the raw water mixed with ozone is discharged to the treatment water storage tank (not shown) through the treatment water outlet D _W under the outer wall 21A of the outer floating separation tank after leaving the lower end of the inner reaction tank 23. Through the raw water W filling the ring-shaped space R formed between the inner wall 23B and the outer wall 21A, unreacted ozone and flotation sludge S _{1 which} did not react with the raw water moved from the lower side to the upper side. After rising to the surface of the raw water (W) after the flotation sludge (S ₁ ) is discharged to the flotation sludge discharge port (D _{S 1} ) by the flotation sludge scraper 22 coupled to the upper portion of the outer separation float, sediment not injured Sludge (S ₂ ) is discharged to the outside through the settling sludge discharge port (D _S2 ) provided in the central lower end of the base (21B) forming a lower portion of the outer flotation tank.

In addition, the unreacted ozone in the raw water is moved upwardly together with the flotation sludge through between the outer flotation separator 21 and the inner reactor 23, and then the upper end of the outer flotation separator 21 to which the flotation sludge scraper 22 is coupled. Through the unreacted ozone collection tank 26 is collected, the collected unreacted ozone is processed in the pretreatment processor (13).

As described above, the raw water in contact with the ozone in the central portion of the inner reaction tank is moved with the ozone until the final discharge time, the ozone unreacted zone is not generated in the raw water movement path of the reaction tank of the present invention.

In addition, it is preferable that the base 21B is formed in the shape of a funnel so as to accumulate the sludge S ₂ precipitated in the present reactor as quickly as possible in a narrow range, and an inclination plate 27 is provided at the inner center thereof. .

In addition, by injecting only air bubbles without injecting ozone bubbles into the reaction tank of the present invention configured as described above can be used for high efficiency sludge concentration.

As described above, in the present invention, ozone disinfection (oxidation) and floating separation are simultaneously performed in one reactor, and the unreacted zone of the ozone bubble is removed, thereby significantly improving the ozone reaction and floating separation efficiency. In addition to reducing the capacity of the ozone treatment unit for treating unreacted ozone, there is an advantage that can significantly reduce the operating cost.

In addition, since the installation area is significantly smaller than the conventional one made of a reaction tank, there is an advantage that can significantly reduce the installation construction cost as well as the equipment investment cost.

Claims (2)

Cylindrical outer wall 21A provided with a floating sludge outlet D _{S 1} and a treated water outlet D _W on each side of the upper and lower sides, respectively, and extending downward in a funnel shape at the lower end of the outer wall 21A, and the sludge discharge outlet ( An outer flotation tank 21 formed of a base 21B having a D _S2 ); Floating sludge scraper (22) coupled to the upper inner diameter of the outer wall (21A); Inner upper plate 23A such that a ring-shaped space R is formed between the inner inner top plate 23A of the disc located in the inner diameter portion of the outer floating separation tank 21 directly under the floating sludge scraper 22 and the outer wall 21A. An inner reaction tank 23 formed of a cylindrical inner wall 23B which stands upright at an edge of the upper and lower ends; An ozone supply pipe 24 which penetrates the upper one side of the outer wall 21A and extends to the inner diameter center, and has one side end bent downward through the central portion of the inner upper plate 23A; A raw water supply pipe 25 which is bent upwardly after penetrating through one lower side of the outer wall 21A and extending to an inner diameter center; It is coupled to the upper outer peripheral surface of the outer wall (21A) to seal the upper portion of the outer flotation separation tank 21 with the outside, and comprises an unreacted ozone trap (26) provided with an unreacted ozone outlet (D _O ) Ozone sterilization and flotation separation integral double cylindrical reactor. According to claim 1, ozone disinfection and float separation integrated double cylindrical reactor, characterized in that the inclined plate 27 is additionally installed in the base (21B) of the outer flotation separation tank (21).

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