KR20240114069A - Circulation type advanced oxidation water treatment device using microbubbles - Google Patents

Abstract

The present invention relates to a circulation type advanced oxidation water treatment device using microbubbles, and is characterized by including: a storage tank into which water to be treated is injected; a UV reaction tank which has a reaction space formed inside and a UV lamp installed in the reaction space, and into which the water to be treated is introduced; a circulation pipe connecting one side of the storage tank and one side of the UV reaction tank and connecting the other side of the storage tank and the other side of the UV reaction tank so that the water to be treated can circulate between the storage tank and the UV reaction tank; and a microbubble supply means having one side connected to the storage tank and supplying microbubbles into the storage tank. According to the present invention as described above, water treatment operation can be stably performed, while preventing damage or breakage of the UV lamp, thereby greatly increasing its lifespan. In addition, there is a feature that water treatment efficiency can be significantly improved using microbubbles.

Description

Circulation type advanced oxidation water treatment device using microbubbles}

The present invention relates to a circulating highly oxidized water treatment device using microbubbles. More specifically, it minimizes vibration during circulation of water to be treated, allows stable water treatment operation, and prevents damage or breakage of the UV lamp. In addition, it relates to a technology that can significantly improve water treatment efficiency by increasing the stirring rate and OH oxidation power using microbubbles.

In general, before discharging wastewater wastes such as domestic sewage from homes and restaurants, wastewater from factories and industrial sites, and livestock waste from ranches, etc. into rivers, the wastewater wastes are purified step by step through a treatment device before being discharged. I order it.

At this time, the method of treating wastewater waste is usually to separate solid and liquid into wastewater and sludge, and manage the sludge separately. After going through biological and physical and chemical processes, the wastewater is separated into sludge and wastewater, and then the wastewater is discharged. do.

Recently, technology using ozone has been expanding as a physical and chemical treatment method for wastewater.

Due to the strong oxidizing power of ozone (O ₃ ), ozone water treatment facilities have been introduced and are in operation at water purification plants around the world, and the sterilization method using ozone is also being adopted for drinking spring water treatment and sterilization in Korea.

Meanwhile, ozone can be obtained by exciting oxygen with ultraviolet rays. In addition, as is known, ultraviolet rays are high-energy light with a wavelength in the range of 0.1 to 400 nm and have the effect of sterilizing microorganisms by destroying their cell walls or membranes.

Ultraviolet rays also excite oxygen in the air to generate ozone (O ₃ ). Therefore, UV lamps not only have a sterilizing effect by ultraviolet rays, but also have a sterilizing, purifying, and deodorizing effect by ozone generated by ultraviolet rays.

In addition, when ultraviolet rays are irradiated on water in which ozone (O ₃ ) is dissolved, the ozone is decomposed again to generate OH ^- radicals, which are intermediate products with a higher oxidation potential difference than ozone.

Therefore, when a UV lamp is used in a wastewater treatment device, it has not only a sterilization effect by ultraviolet rays, but also a multi-faceted sterilization, purification, and deodorization effect by ozone generated by ultraviolet rays and OH ^- radicals generated by decomposition of ozone. , This method of sterilization by the simultaneous action of ultraviolet rays, ozone, and OH ^- radicals is called AOP, and many reaction devices that sterilize and purify wastewater using such UV lamps are known.

As shown in Figure 1, the conventional reaction device 100 for wastewater treatment includes a reaction tank 110 with a reaction space 111 formed inside and an outlet formed on one side of the bottom, and a stirring unit installed inside the reaction tank 110 ( 120), a UV lamp 130 installed on one side of the reaction tank 110, and a motor 140 connected to the stirring unit 120 to provide rotational force to the stirring unit.

In this conventional reactor 100 for wastewater treatment, when the water to be treated is introduced into the reaction tank 110 and the water to be treated is irradiated with ultraviolet rays from the UV lamp 130, ozone is generated along with the ultraviolet rays. Sterilization, purification, and deodorization of microorganisms in the water to be treated by OH ^- radicals and at the same time agitating the water to be treated in the stirring unit 120, thereby achieving sterilization, purification, and deodorization efficiency of the water to be treated by ultraviolet rays, ozone, and OH ^- radicals. Let’s make this even better.

The water treated in this way is discharged to the outside through an outlet formed at the bottom of the reaction tank 110.

However, in the conventional wastewater treatment reactor 100, the UV lamp 130 is frequently damaged or broken due to vibration generated in the process of treating the water to be treated and foreign substances contained in the water to be treated, or the motor 140 ) There was a problem in that the system itself was unstable as the reaction tank 110 vibrated due to vibration.

The present invention was developed to solve the above problems. The purpose of the present invention is to minimize vibration during circulation of water to be treated, so that water treatment operation can be performed stably, and to prevent damage or breakage of the UV lamp in advance. In addition, we provide a circulating advanced oxidation water treatment device using microbubbles that can significantly improve water treatment efficiency by increasing the stirring rate and OH oxidation power using microbubbles.

According to one aspect of the present invention for achieving the above object, a storage tank into which water to be treated is introduced, a reaction space is formed therein, and a UV lamp is installed in the reaction space, and the water to be treated is By connecting the UV reaction tank flowing into the inside, one side of the storage tank and one side of the UV reaction tank, and connecting the other side of the storage tank and the other side of the UV reaction tank, the water to be treated can circulate between the storage tank and the UV reaction tank. The aim is to provide a circulation type highly oxidized water treatment device using microbubbles, which includes a circulation pipe and a microbubble supply means on one side of which is connected to the storage tank and supplies microbubbles into the storage tank.

Preferably, the microbubble supply means receives the water to be treated in the storage tank and generates microbubbles using the water to be treated.

In addition, it may further include a circulation pump that is installed on one side of the circulation path of the water to be treated moving along the circulation pipe and pumps the water to be treated in one direction in the circulation pipe.

According to the present invention as described above, water treatment operation can be performed stably, and the lifespan can be greatly increased by preventing damage or breakage of the UV lamp, and water treatment efficiency can be significantly improved by using microbubbles. there is.

1 is a diagram showing a conventional reactor for wastewater treatment;
Figure 2 is a diagram schematically showing a circulation type advanced oxidation water treatment device using microbubbles according to an embodiment of the present invention;
Figure 3 is a diagram showing a state in which microbubbles are supplied to a storage tank according to an embodiment of the present invention;
Figure 4 is a view showing a state in which water to be treated is moved from a storage tank to a UV reaction tank according to an embodiment of the present invention;
Figure 5 is a view showing a state in which water to be treated is moved from a UV reaction tank to a storage tank according to an embodiment of the present invention.

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

Figure 2 is a diagram schematically showing a circulation type advanced oxidation water treatment device using microbubbles according to an embodiment of the present invention.

As shown in Figure 2, the circulation type advanced oxidation water treatment device (1) using microbubbles according to an embodiment of the present invention includes a storage tank (10), a UV reaction tank (20), a circulation pipe (30), and a circulation pump. (40) and a micro bubble supply means (50).

The storage tank 10 is formed in a substantially cylindrical shape, and a receiving space 11 is formed inside so that water to be treated flows in from the outside, and one end of an oxidizing agent supply unit 12 for supplying an oxidizing agent or catalyst is connected to one side of the upper part. You can.

The oxidizing agent supply unit 12 is connected to a storage tank (not shown) in which an external catalyst or oxidizing agent is stored and serves to supply a catalyst or oxidizing agent into the storage tank 10. Here, the catalyst is hydrogen peroxide (H ₂ O ₂ ). , oxygen (O ₂ ), etc. can be used.

This storage tank 10 serves to provide a mixing space for water to be treated, an oxidizing agent or catalyst, and microbubbles, which will be described later.

The UV reaction tank 20 is formed in a roughly cylindrical shape, has a reaction space 21 formed therein, and is equipped with a UV (ultraviolets, ultraviolet) lamp (ultraviolets) that irradiates ultraviolet rays to the water to be treated on one side of the inside where the reaction space 21 is formed. 22) is installed.

This UV reaction tank 20 is constructed separately from the storage tank 10, and serves to provide a reaction space 21 in which water to be treated entering the interior is sterilized and purified by ultraviolet rays, ozone, and OH-radicals.

The circulation pipe 30 includes a first circulation pipe 31 whose one end is connected to one side of the storage tank 10 and the other end is connected to one side of the UV reaction tank 20, and one end is connected to the other side of the UV reaction tank 20. and a second circulation pipe 32, the other end of which is connected to the other side of the storage tank 10, and a circulation path for the water to be treated so that the water to be treated can circulate between the storage tank 10 and the UV reaction tank 20. It plays a role in providing.

Accordingly, the first circulation pipe 31 provides a first movement path for water to be treated moving from the storage tank 10 to the UV reaction tank 20, and the second circulation pipe 32 provides a first movement path for water to be treated moving from the UV reaction tank 20 to the storage tank. It serves to provide a second movement path, that is, a return path, for the water to be treated returning to (10).

Meanwhile, a discharge pipe 33 may be connected to one side of the circulation pipe 30. The discharge pipe 33 extends outward from one side of the first circulation pipe 31, and is selectively opened by a valve installed on one side of the discharge path through which the water to be treated is discharged, thereby discharging the treated water to the outside. Do it.

The circulation pump 40 is installed on one side of the circulation pipe 30 and serves to circulate the water to be treated through the storage tank 10 and the UV reaction tank 20 by pumping the water to be treated in the circulation pipe 30 in one direction. In this embodiment, the circulation pump 40 will be described as being installed on one side of the first circulation pipe 31.

In addition, it is obvious that this circulation pump 40 is well known to those skilled in the art to the extent that it can be purchased and used commercially, and detailed description of its configuration will be omitted.

The microbubble supply means 50 is connected to the storage tank 10 and serves to supply microbubbles into the storage tank 10. And the microbubble supply means 50 according to this embodiment can suck the wastewater flowing into the storage tank 10, use it to generate microbubbles, and then re-introduce them into the storage tank 10.

Figure 3 is a diagram showing a state in which microbubbles are supplied to a storage tank according to an embodiment of the present invention, and Figure 4 shows a state in which water to be treated is moved from the storage tank to the UV reaction tank according to an embodiment of the present invention. It is a diagram, and Figure 5 is a diagram showing a state in which water to be treated is moved from a UV reaction tank to a storage tank according to an embodiment of the present invention.

The operation of the cyclic advanced oxidation water treatment device 1 using microbubbles according to an embodiment of the present invention having such a configuration will be described with reference to the attached FIGS. 3 to 5 as follows.

First, when the water to be treated flows into the storage tank 10, the oxidizing agent is introduced into the storage tank 10 from the oxidizing agent supply unit 12. At the same time, the microbubble supply means 50 sucks the water to be treated in the storage tank 10, generates microbubbles, and supplies them into the storage tank 10.

Then, the water to be treated in the storage tank 10 is moved along the first circulation pipe 31 along with the microbubbles to the UV reaction tank 20 by the circulation pump 40.

In the UV reaction tank 20, ultraviolet rays irradiated from the UV lamp 22 excite oxygen in the air to generate ozone, and the generated ozone is decomposed again by ultraviolet rays to generate OH ^- radicals.

Accordingly, the water to be treated flowing into the UV reaction tank 20 is sterilized and purified by being oxidized by ultraviolet rays irradiated from the UV lamp 22, ozone, and OH ^- radicals.

At this time, when hydrogen peroxide is used as an oxidizing agent, OH ^- radicals are generated through the reaction equation below. One hydrogen peroxide and two ozone molecules react to create two OH ^- radicals, thereby promoting the oxidation of the water to be treated.

H ₂ O ₂ + H ₂ O → HO ₂ ^- + H ₃ O ⁺

O ₃ + HO ₂ - → OH + O ₂ ^- + O ₂

O ₂ ^- + H ⁺ → HO ₂

O ₃ + O ₂ ^- → O ₃ ^- + O ₂

O ₃ ^- + H ⁺ → HO ₃

HO3 → HO + _O2

∴H ₂ O ₂ +2O ₃ → 2HO + 3O ₂

In addition, microbubbles contained in the water to be treated increase the stirring rate of the oxidizing agent and improve the oxidizing power by OH ^- radicals, greatly improving water treatment efficiency.

The treated water is continuously moved by the pressure of the circulation pump 40 and returns to the storage tank 10 along the second circulation pipe 32. As described above, the water storage tank 10 and the UV reaction tank ( 20) is repeatedly moved, that is, circulated, agitated with ozone and OH ^- radicals, reacted and treated, and then discharged to the outside through the discharge pipe 33.

Meanwhile, in order to determine the water treatment efficiency depending on whether microbubbles were added, the present applicant compared the advanced oxidation experimental group in which microbubbles were added and the advanced oxidation experimental group in which microbubbles were not added.

The experiment used a circulating advanced oxidation water treatment device using microbubbles according to an embodiment of the present invention, and 0.13% of the oxidizing agent of pH7 was used for dye (methyl orange) at a temperature of 25°C and a concentration of 100ppm, and the experimental group was conducted using microbubbles with a particle diameter of 45㎛ to 47.5㎛ and a bubble concentration of 15,000ea/mL to 20,000ea/mL, and the results of the experiment showed the following results.

From the above result graph, you can see that the reaction time is significantly reduced depending on whether microbubbles are introduced. For example, when 20 minutes have passed since the start of the reaction, approximately 12% of the control group was treated, while the experimental group in which microbubbles were introduced was confirmed to have processed up to about 35%.

In addition, based on chromaticity, the reaction time for the control group without microbubbles was 100 minutes, while the reaction time for the experimental group with microbubbles was 80 minutes.

These results confirm that water treatment efficiency is greatly increased by microbubbles in advanced oxidation reactions.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, various modifications and variations can be made without departing from the spirit and scope of the invention. Accordingly, the scope of the appended claims will include such modifications or variations as fall within the gist of the present invention.

10: storage tank 11: accommodation space
12: oxidizing agent supply unit 20: UV reaction tank
21: reaction space 22: UV lamp
30: circulation pipe 31: first circulation pipe
32: second circulation pipe 33: discharge pipe
40: Circulation pump 50: Micro bubble supply means

Claims (3)

A storage tank into which water to be treated is introduced;
A UV reaction tank in which a reaction space is formed inside, a UV lamp is installed in the reaction space, and the water to be treated flows into the reaction tank;
A circulation pipe connecting one side of the storage tank and one side of the UV reaction tank and connecting the other side of the storage tank and the other side of the UV reaction tank to allow the water to be treated to circulate between the storage tank and the UV reaction tank; and
A circulation type advanced oxidation water treatment device using microbubbles, characterized in that one side is connected to the storage tank and includes a microbubble supply means for supplying microbubbles into the storage tank.
According to paragraph 1,
The microbubble supply means is a circulation type advanced oxidation water treatment device using microbubbles, characterized in that the water to be treated is introduced into the storage tank, and the microbubbles are generated using the introduced water to be treated.
According to paragraph 1,
Circulating advanced oxidation water treatment using microbubbles, which is installed on one side of the circulation path of the water to be treated moving along the circulation pipe, and further includes a circulation pump that pumps the water to be treated in one direction in the circulation pipe. Device.