KR200413336Y1 - Modified sewage and wastewater treatment apparatus - Google Patents

Abstract

The present invention relates to a wastewater treatment device, an oil-water separation device for separating the wastewater introduced through the wastewater inflow line by a specific gravity difference, and the dissolved air generating the wastewater from the wastewater separation device and the treated water separated from the pollutant. Ozone contact tank for oxidizing the flotation device, the treated water treated in the dissolved air flotation device by the ozone supplied from the ozone generator, and the oxidized treated water sent from the ozone contact tank to remove pollutants and excess ozone. A pressure filtration device for generating filtered water, a filtration water storage tank for storing or reusing the filtration water generated in the pressure filtration device, and contaminants and pressure filtration treated in the oil / water separator and the dissolved air flotation device. Sludge treated by natural dehydration and drying method is discharged and filtered by washing water The water includes an oil drying tank for recovering the raw water storage tank, and the dissolved air flotation device relates to an improved wastewater treatment device equipped with a microbubble generating pump that generates dissolved air microbubbles on its own.

Therefore, by adding a non-powered oil-water separator using a specific gravity difference to the front of the conventional wastewater treatment device, the wastewater having a relatively high concentration of oil and suspended solids is pretreated. After removing the substance, by removing the untreated contaminants using the oxidation treatment and filtration by ozone, there is an effect of reducing the management cost and increase the efficiency of waste water treatment.

In addition, even without the microbubble injection valve of the dissolved air flotation device of the waste water treatment apparatus can generate microbubbles of the dissolved air with a microbubble generation pump has the effect of increasing the efficiency of manufacturing, installation and maintenance.

Oil-water separator, dissolved air flotation device, ozone contact tank, pressure filtration device, oil drying tank

Description

Modified sewage and wastewater treatment apparatus

1 is a schematic view showing an improved wastewater treatment apparatus according to the present invention,

Figure 2 is a front view showing the oil and water separator according to the present invention,

3 is a plan view showing the dissolved air floating device according to the present invention,

4 is a cross-sectional view showing the line "III-III" of FIG.

5 is a cross-sectional view showing a pressure filtration device according to the present invention,

Figure 6 is a flow chart schematically showing the processing sequence of the improved wastewater treatment apparatus according to the present invention.

<Description of Symbols for Main Parts of Drawings>

10: raw water storage tank

20: oil and water separator 21: bulkhead

30: dissolved air flotation device 31: pressurized floatation tank

40: ozone contact tank 41: ozone generator

50: pressure filtration device 60: oil drying tank

70: filtered water storage tank 71: fine bubble generation pump

72: cleaning pump

L1: Wastewater Inflow Line L2: Separation Water Inflow Line

L3: Pollutant Discharge Line L4: Flotation Treatment Water Inflow Line

L5: Ozone inlet line L6: Filtration device connection line

L7: Microbubble spray line L8: Backwash line

L9: Raw water tank connection line

The present invention relates to a wastewater treatment device capable of separating and treating contaminants such as detergents and oil particles contained in general wastewater with water, and in particular, it treats pollutants having a high concentration of oil and suspended solids through an oil and water separator. In addition, the present invention relates to a modified sewage and wastewater treatment apparatus that simplifies configuration, and facilitates management such as manufacturing, installation, and maintenance.

Applicant of the present invention has disclosed a "waste water treatment apparatus" (patent registration No. 538347; cited invention), a system for treating waste water in 2005, and treats fine waste water with a high concentration of oil and suspended solids. It is necessary to supplement this in order to construct a facility capable of causing dissolved air injury without a bubble injection valve.

In other words, the most important point in a device or method for separating and removing contaminants such as oil particles contained in waste water is to treat the oil particle in consideration of the characteristics of the oil particles and the degree of mixing of the suspension. Looking at the shape of, when the diameter of the oil particles is 150㎛ or more free oil, when the diameter of the oil particles 60㎛ or less, it is attached to the emulsion oil (Emulsion Oil) and certain particles (adhesive oil) Oil-Wet Solid).

However, in the cited invention, wastewater having low concentrations of oil and suspended solids can be treated only by using a dissolved air flotation device that removes emulsion oil and adhesive oil, but it is difficult to treat wastewater having a relatively high concentration. There is a hassle of manufacturing, installing, and maintaining a microbubble injection valve that generates microbubbles of dissolved air in an air flotation device.

Therefore, wastewater having a high concentration of oil and suspended solids is required to be treated in stages to efficiently separate and remove wastewater, thereby improving the treatment effect and simplifying the construction of the facility.

The present invention has been devised to solve the above problems, and provides an oil treatment apparatus that can efficiently separate and process oil regardless of various sizes of various detergents or oil particles contained in general wastewater through an oil / water separator. The purpose of the present invention is to supplement the wastewater treatment apparatus of "Patent No. 0538347" with a focus on the removal of particles and suspended solids.

In addition, there is another object to provide a treatment device in which the configuration of the facility is simplified by generating fine bubbles of the dissolved air through the microbubble generating pump in the dissolved air flotation device.

The present invention for achieving the above object, the oil and water separation device for separating the waste water introduced through the waste water inflow line by the specific gravity difference, and to generate the treated water separated from the waste water and pollutant separated from the oil and water from the oil and water separator Dissolved air flotation device, ozone contact tank for oxidizing the treated water treated by the dissolved air flotation device with ozone supplied from an ozone generator, and oxidized treated water sent from the ozone contact tank as a pollution source and surplus ozone. A pressure filtration device for generating filtered water by removing the filtration, a filtration water storage tank for storing or reusing the filtration water generated in the pressure filtration device, and contaminants and pressures treated in the oil / water separator and the dissolved air flotation device. Sludge treated by natural dehydration and drying method is discharged by supplying the washing water that cleans the food filtration system. Fruit drying the oil tank and wherein the dissolved air flotation device that returned to the raw water storage tank is characterized in that the pump comprises a micro-bubble generator for generating micro-bubbles of dissolved air.

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

1 is a schematic view showing an improved wastewater treatment device according to the present invention, Figure 2 is a front view showing the oil and water separation device according to the present invention, Figure 3 is a plan view showing a dissolved air flotation device according to the present invention, Figure 4 3 is a cross-sectional view showing a "III-III" line of Figure 3, Figure 5 is a cross-sectional view showing a pressure filtration device according to the present invention, Figure 6 is a flow chart schematically showing the processing sequence of the improved wastewater treatment device according to the present invention. to be.

As shown in Figure 1, the improved wastewater treatment apparatus according to the present invention is a raw water storage tank 10, oil-water separator 20, dissolved air flotation device 30, ozone contact tank 40, pressure filtration device 50, an oil drying tank 60 and a filtrate storage tank 70.

Waste water to be treated is stored in the raw water storage tank 10, and the oil-water separator 20 receives waste water from the raw water storage tank 10 connected to the wastewater inflow line L1 to contaminate the waste water. The substance is separated into oil-free water, and the partition wall 21 is present in the apparatus, and the waste water and the oil water are automatically separated by the specific gravity, so that the oil water separation can be effectively performed.

At this time, the waste water inlet line (L1) is connected to one side of the oil and water separation device 20, and discharges pollutants including oil particles and floating substances of oil and water separated from the oil water separation device 20 at approximately the end of the oil and water separation device 20. Contaminant discharge line (L3) is connected to.

In FIG. 2, reference numeral 22 denotes a drain pipe of the oil / water separator 20.

The dissolved air flotation device 30 is introduced into the oil-water separation water inflow line L2 connected to the oil-water separator 20 to remove the emulsion oil and the adhesive oil contained in the oil-water separated waste water, and fine bubbles of the dissolved air. To treat the wastewater. That is, fine bubbles of dissolved air are generated in the dissolved air flotation device 30 to adsorb the oil particles and then float to remove the oil particles.

The dissolved air flotation device 30, as shown in Figures 3 and 4, comprises a rectangular sealed pressurization tank 31 to be able to store a certain amount of pressurized water, the pressurized floatation tank 31 One side of the) is connected to the oil and water separation inlet line (L2), the contaminant discharge line (L3) for discharging contaminants including the oil particles floating on the adsorbed by the microbubble at the end of the pressure floating tank (31) Is connected, the floating treatment water inlet line (L4) is connected to the upper side of the pressurized floatation tank (31).

And, the lower side of the pressurized floatation tank 31 is connected to the fine bubble spray line (L7) for supplying a fine bubble.

In addition, the pressurized floatation tank 31 is provided with a partition wall 33 in an oblique direction to guide the microbubbles generated from the microbubble generating pump 71 to the pollutant discharge line L3.

In FIG. 3 and FIG. 4, reference numeral 32 denotes a drain pipe of the pressurized floatation tank 31.

Meanwhile, as shown in FIGS. 3 and 4, the oil / water separator 20 and the dissolved air floater 30 are separated from the oil-water separator 20 and the dissolved air floater 30. There is provided an oil drying tank 60 having the function of storing the removed oil and sludge and dehydrating and drying it.

The oil drying tank 60 discharges the sludge contained in the treated water supplied through the pollutant discharge line (L3) from the oil water separator 20 and the pressurized floatation tank 31 on one side, and the filtered water is supplied to the raw water storage tank. The raw water tank connecting line (L9) to recover is connected.

That is, the oil drying tank 60 is provided with a filtration unit 61 consisting of a sand layer 61a and a gravel layer 61b, and the treated water passing through the filtration unit 61 passes through the raw water tank connection line L9. Will be supplied to the raw water storage tank 10 through.

In FIG. 1, the dissolved air flotation device 30 and the oil drying tank 60 are separately shown in order to understand the process flow.

The ozone contact tank 40 is connected to the flotation treatment water inlet line (L4) is introduced into the waste water from the dissolved air flotation device 30, the waste water is a chemical treatment of the pollutants by ozone oxidation technology, ozone decomposition When the organic matter is oxidatively decomposed by oxygen and hydroxyl (OH ⁻ ) generated when the reaction occurs.

Then, the ozone inflow line (L5) is connected to the flotation treatment water inflow line (L5) so that the flotation treatment water meets the ozone supplied by the ozone generator 41 is mixed in the ozone contact tank (40).

Since the ozone contact tank 40 and the ozone generator 41 are generally disclosed in detail, detailed description thereof will be omitted.

As shown in FIG. 5, the pressure filtration device 50 includes a cylindrical sealed filtration tank 51, a filtration unit 52 provided inside the filtration tank 51, and the filtration tank. And a filter plate 53 coupled to the lower side of the 51.

The filtration unit 52 has an activated carbon layer 52a, anthracite layer 52b, a sand layer 52c, and a gravel layer 52d sequentially disposed from the upper side to the lower side to filter waste water.

The filter plate 53 is horizontally coupled to the lower side of the filter tank 51, the filter plate 53 is formed with a plurality of filter holes (53a).

The pressure filtration device 50 sieves contaminants in the wastewater, such as COD, suspended solids, n-hexane, ABS, etc., supplied from the ozone contact tank 40 to the filter connecting line L6. And as a final treatment by using the adsorption function, the final treated water is collected into the filtered water storage tank 70 and the filtration unit 52 inside the pressure filtration device 50 is configured to be automatically cleaned according to the operating time do. That is, the filtration tank 51 is connected to the filtered water storage tank 70 and the back washing line (L8) to be automatically cleaned by the filtered water supplied to the back washing line (L8) through a predetermined state or any manipulation. Will be.

The filtered water storage tank 70 serves to store the filtered water filtered in the pressure filtration device 50, the filtered water is the microbubble generated water and the filtration unit of the pressure filtration device (50) ( 52 is used as washing water for washing. On the other hand, the microbubble generation pump for generating and supplying microbubbles of dissolved air to the microbubble spray line (L7) and backwash line (L8) connecting the dissolved air flotation device 30 from the filtered water storage tank (70), respectively. A 71 and a cleaning pump 72 for supplying the washing water are provided.

And, the remaining treated water used in the system is discharged to the outside or reused through the filtered water discharge line (L10).

The microbubble generating pump 71 is an embodiment of the present invention, and uses a centrifugal pump having a wesco type gear therein. That is, the microbubble generating pump 71 generates microbubbles by forming a cavitation in the gear provided therein.

In this case, the cavitation (cavitation) refers to a phenomenon in which a bubble is formed by a portion where the pressure is lowered when the liquid rotates at high speed, and generally refers to excessive erosion, knocking, and vibration of the rotating blades. It is not preferable because it causes noise and changes the shape of the flow, thereby rapidly decreasing the efficiency.

In the present invention, however, the microbubbles generated in the microbubble generating pump 71 are supplied to the dissolved air flotation device 30 and applied to the wastewater separation.

Improved wastewater treatment apparatus according to the present invention configured as described above has a process flow as shown in Figure 6, the contents thereof will be described in detail as follows.

In the improved wastewater treatment device of the present invention, the wastewater supplied from the raw water storage tank 10 is installed with a partition on the oil water separator 20 to effectively separate the oil and water from the pollution separation step 1 (S1), and the wastewater separated from the oil water is introduced. The ozone and ozone contact tank supplied from the ozone generator 41 and the pollution separation step 2 (S2) for separating water and pollutants by spraying the microbubbles of the dissolved air through the microbubble generating pump to the dissolved air flotation device 30 ( The oxidation treatment step (S3) forcibly contacted at 40) and the pressure filtration to remove the pollutant and the surplus ozone through the pressure filtration apparatus by means of sieving or adsorption from the waste water from which the oxidized treatment is separated. Step (S4), and the filtrate storage step (S5) for storing the filtrate generated in the filtration step in the filtrate storage tank (70), and if the filtrate more than a predetermined amount is stored in the filtrate storage tank (70) Filtrate discharge step (S6) to discharge to the negative filtration unit washing step (S7) for cleaning the contaminated filtration unit 52 of the pressure filtration device 50 by transferring the filtrate stored in the filtrate storage tank (70) and To dispose of the contaminants by transporting the contaminant removed in the filtration step (S4) and the filtration unit 52 to the oil drying tank 60, and then dehydrating and drying the contaminants. By performing the process of dehydration drying step (S8) is to treat the waste water.

To describe this process in more detail, after storing a certain amount of waste water to be treated in the raw water storage tank (10), the waste water is supplied to the oil / water separator (20) through a wastewater inflow line (L1) to separate the oil water ( S1), when the wastewater separated from the oil / water is supplied to the dissolved air flotation device 30 through the oil-water separation water inflow line L2, the fine air of the dissolved air is discharged by the microbubble generation pump 71 provided in the microbubble injection line L7. Bubbles are supplied, and the microbubbles of the dissolved air supplied in this way are introduced into the dissolved air flotation device 30 to come into contact with the input wastewater to separate oil particles remaining in the input wastewater. When supplied to the ozone contact tank 40 through the treated water inlet line (L4), the ozone supplied from the ozone generator 41 and the contaminants contained in the wastewater react and are oxidized. (S3) The oxidized treated wastewater is filtered. Via device connection line (L6) Ryeoksik is supplied to the filtering device 50 to the final treatment of contaminants by using a sieve, and manure suction function. (S4)

Then, the final treated water is stored in the filtered water storage tank 70 (S5) and the stored treated water is washed by the pressure type filtration device 50 through the back washing line (L8) with the cleaning pump 72, (S7) Excess treated water is discharged to the outside through the filtered water discharge line (L10) (S6).

In addition, the oil and suspended solids separated in the oil / water separator 20 and the dissolved air flotation device 30 are removed and supplied to the oil drying tank 60 through the pollutant discharge line L3, and then the sludge to the outside. Is discharged, the treated water is sent to the raw water storage tank 10 through the raw water tank connection line (L9).

As such, in the present invention, the oil-water separation apparatus 20 is added to the "waste water treatment apparatus" of the cited invention (patent registration No. 538347), and the dissolved air flotation apparatus 30 and the ozone contact tank 40, the pressure type By integrating with the filtration device 50, suspended substances such as oil particles are gradually processed in the oil-water separation device 20 and the dissolved air flotation device 30, and the adsorption efficiency is increased by oxidative decomposition of residual pollutants and low molecular weight of the polymer material. And it can induce effects such as filter life extension.

The improved wastewater treatment device according to the present invention adds a non-powered oil-water separator using a specific gravity difference to the front of the conventional wastewater treatment device to pretreat wastewater having a relatively high concentration of oil and suspended solids, and generate fine bubbles of dissolved air. And after removing the oil and suspended solids through the flotation, by removing the untreated pollutants using the oxidation treatment and filtration by ozone, there is an effect of reducing the management cost and increase the efficiency of waste water treatment.

In addition, even without the microbubble injection valve of the dissolved air flotation device of the waste water treatment apparatus can generate microbubbles of dissolved air with a microbubble generating pump has the effect of increasing the efficiency of manufacturing, installation and maintenance.

Claims (2)

In the wastewater treatment device, A wastewater inflow line connected to the wastewater inflow line, the oilwater separation water inflow line, and the pollutant discharge line, wherein each of the lines is partitioned by a partition wall to separate the wastewater introduced through the wastewater inflow line by specific gravity; A dissolved air flotation device for generating treated water from which waste water separated from the oil water and the pollutant are separated from the oil / water separator; An ozone contact tank for oxidizing the wastewater treated by the dissolved air flotation device by forcibly contacting the ozone supplied from the ozone generator; A pressure filtration apparatus for generating filtered water by removing oxidized waste water, pollutants and excess ozone sent from the ozone contact tank; A filtered water storage tank for storing the filtered water generated in the pressure filtration device for reuse or discharge; The oil-drying system is supplied with the cleaning water for cleaning the contaminants and pressure filtration devices treated in the oil-water separation device and the dissolved air flotation device, and the sludge treated by the natural dehydration and drying method is discharged, and the filtered water is recovered to the raw water storage tank. Including tanks, The dissolved air flotation device is an improved wastewater treatment device, characterized in that the microbubble generating pump for generating fine bubbles of the dissolved air is provided. The method of claim 1, The microbubble generating pump is an improved wastewater treatment apparatus, characterized in that to generate microbubbles by forming a cavitation in the gear provided therein.

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