JP5265431B2 - Water purification device - Google Patents

Description

  The present invention relates to an apparatus for purifying water quality that is installed in hot springs, public baths, and pools and that is contaminated with bacteria.

  As a method of purifying pools, baths, and hot springs, a part of the stored water is taken out and subjected to physical separation operations such as sand filtration, auxiliary agent filtration, coagulation sedimentation, pressurized flotation, or biological oxidation treatment. After the application, a circulation purification method for returning to the stored water is common. In recent years, the quality of industrial water, groundwater, and tap water has deteriorated due to water pollution of water sources, and awareness of water recycling and safety improvement has increased. In some conventional physical separation operation techniques such as coagulation sedimentation and pressurized flotation, the required purification level may not be achieved.

  Also, sand filtration, coagulation sedimentation, pressure floatation, etc. have a separation accuracy of 10 μm or more, and it is difficult to remove suspended fine particles having a size smaller than that. Auxiliary filtration is a method of forming a filter aid precoat layer such as diatomaceous earth on the surface of a filter medium such as a filter cloth, and performing filtration with this layer. In addition to the time and effort required for replacement, the auxiliary agent itself becomes waste, which is undesirable for the environment.

  In addition, when purifying stored water using a biological oxidation method, it takes time for the purification treatment, and installation space is increased to compensate for this, and maintenance and management are complicated. Many problems arise, such as the need for a removal device. However, the method described above is difficult to purify water contaminated with bacteria in the hot springs and public baths targeted by the present invention.

  When the water becomes dirty, the circulating water system piping, the water tank, etc. become dirty, a biofilm is formed here, and the sterilizing effect is reduced even if the chemical is added. Furthermore, organic suspended matter adheres to the biofilm, and microorganisms grow using this as a nutrient source to form slime, resulting in problems such as clogging of the piping and peeling of the greatly grown slime.

“Fluid sterilization apparatus and sterilization method” according to Japanese Patent Application Laid-Open No. 2007-275842 is a sterilization apparatus and sterilization method having a high fluid sterilization effect and having a simple structure.
In other words, a flow path body through which a fluid passes, an ultrasonic vibrator, and an ultrasonic reaction diffuser are provided. The ultrasonic vibrator is disposed in the flow path body, and the ultrasonic reaction diffusion is performed while the ultrasonic wave is irradiated. The body is arranged.

Therefore, when ultrasonic waves are irradiated onto the surface of the ultrasonic reaction diffuser, cavitation occurs on the surface, and shock waves and fine local high-temperature regions are generated by the collapse of minute bubbles, resulting in hydroxyl radicals, etc. Radicals are generated and bacteria such as E. coli and microorganisms are killed.
"Fluid sterilization apparatus and sterilization method" according to JP 2007-275842 A

  As described above, the conventional water purification device has the above-described problems. The problems to be solved by the present invention are these problems, and provide a water purification apparatus that does not require a large place and that does not require a short-term maintenance and does not deteriorate a stable sterilization and purification function.

  The present invention forms, for example, a flow path that circulates in such a manner that contaminated bathtub liquid flows out from a bathtub in a hot spring, kills contained bacteria, and returns to the bathtub again. The water purification apparatus of the present invention constitutes a part of the circulation flow path and includes a circulation pump, a filter, etc., but the other devices are not limited. The use of the water purification device is mainly intended for facilities used by an unspecified number of people, such as hot springs, public baths, and pools.

By the way, the water purification apparatus of the present invention includes a sawtooth spiral photocatalyst network in a cylindrical body, ultraviolet lamps arranged in pairs in a crossed state, and an ultrasonic vibrator at the bottom. . The sawtooth-shaped spiral photocatalyst net is disposed along the inner surface of the main body while leaving a space therebetween, and is also disposed between the pair of ultraviolet lamps. The lower part of the main body has a supply port, and the upper part of the main body has a discharge port. Fluid flows in from the supply port and flows out from the discharge port.
Here, the helical photocatalyst is made of a cutting piece made by cutting a titanium material, heated in an inert atmosphere, and then cooled to form a titanium dioxide coating on the surface. It is a piece.

  In the water purification apparatus according to the present invention, if contaminated fluid flows from the supply port, bacteria contained by ultraviolet rays irradiated from the ultraviolet lamp are killed. The cross section of the supply port provided in the main body is small compared to the cross-sectional area of the main body, so that the fluid flowing into the main body is exposed to ultraviolet rays for a relatively long time. Here, if the main body has a cylindrical shape, the range in which ultraviolet rays reach can be made uniform, and bacteria can be killed more effectively. However, the shape of the main body is not limited to a cylindrical shape.

  Since the paired ultraviolet lamps are arranged so as to cross each other at a predetermined interval, the transmittance of ultraviolet rays can correspond to a change in water quality and can be irradiated uniformly over a wide range. On the other hand, by arranging a serrated helical photocatalyst network along the inner surface of the main body, the reduced ultraviolet irradiation is excited by the helical photocatalyst network, and the bacterial killing effect near the inner surface of the purification device main body is reduced. There is nothing.

  Furthermore, by interposing a spiral photocatalyst between the upper and lower UV lamps crossing each other, it is possible to absorb ultraviolet irradiation light from all angles and irregular reflection light of the ultraviolet irradiation light, and to promote excitation of the helical photocatalyst network. I can do it. On the other hand, although an ultrasonic vibrator is installed at the bottom of the main body, cleaning inside the apparatus main body and prevention of adhesion of dirt are performed by cavitation and nano-valve phenomenon generated by the ultrasonic vibrator. The ultrasonic permeability can also prevent contamination in the pipe from the treatment liquid outlet to the bathtub.

Cleaning process for hot spring bathtubs equipped with water purification equipment. In the Example which shows the water purification apparatus which concerns on this invention, (a) is a longitudinal cross-sectional view, (b) A cross-sectional view. FIG.

  FIG. 1 shows a series of devices for treating bath liquid 21 of a hot spring. In FIG. 1, 1 is a water purification device according to the present invention, 2 is a bathtub, 3 is a circulation pump, 4 is a filter, and 5 is hair collection. Machines 6 represent sodium hypochlorite tanks, respectively. The outflow pipe 7 is connected to the bottom of the bathtub 2, and the inflow pipe 8 is connected to the upper side of the bathtub 2, and the bath liquid 21 that has flowed out of the outflow pipe 7 is removed and contained. The bacteria that are present are killed and returned to the bathtub 2 from the inflow pipe 8.

  The bath liquid 21 is circulated by the circulation pump 3. The bath liquid 21 flows through the pipe, and an appropriate amount of sodium hypochlorite contained in the sodium hypochlorite tank 6 is added to the pipe. Sodium hypochlorite is generally used to kill various bacteria contained in tap water, and has the effect of killing Escherichia coli, Salmonella, Pseudomonas aeruginosa, Staphylococcus aureus and the like.

  The hair collecting machine 5 can collect the hair mixed in the bath liquid 21, and the filter 4 filters impurities other than the hair. Here, the specific structures of the hair collecting machine 5 and the filter 4 are not limited, and various types are commercially available. And the bath liquid 21 from which hair and other impurities are removed can flow into the water purification apparatus 1 according to the present invention and kill contained bacteria.

  Various bacteria are killed by the sodium hypochlorite, but in the present invention, bacteria that are not killed by the sodium hypochlorite, or various bacteria are killed by the water purification apparatus without adding sodium hypochlorite. It is possible to make it. 2 (a) and 2 (b) show an embodiment showing the water purification device 1 of the present invention.

  The water purification apparatus 1 has a cylindrical main body 9, a supply port 10 through which the bath liquid 21 flows is provided on the lower side surface of the main body 9, and a discharge port 11 through which the bath liquid 21 flows out on the upper surface. Is provided. The supply port 10 and the discharge port 11 are connected to the pipe. The bath liquid 21 flowing out from the filter 4 enters the main body 9 from the supply port 10, and the bath liquid 21 flowing out from the discharge port 11 flows into the inflow. It flows through the pipe 8 and is returned to the bathtub 2. Here, the supply port 10 may be a lower portion of the main body 9 and is not limited to the lower side surface. Further, the discharge port 11 is not limited to the upper surface as long as it is an upper portion of the main body 9.

  By the way, an ultrasonic vibrator 12 is attached to the lower surface of the main body 9 of the water purification apparatus 1, and an ultraviolet lamp 13 is horizontally mounted coaxially with the supply port 10, and is positioned above the ultraviolet lamp 13. In addition, another ultraviolet lamp 14 crossing in the vertical direction is provided. The ultraviolet lamp 13 and the ultraviolet lamp 14 in FIG.

  Then, a serrated helical photocatalyst network 16, 16,... Is disposed leaving a space 15 between the inner surface of the main body 9, and a substantially rectangular tube is formed by the sawtooth helical photocatalyst network 16, 16,. Forming. The corners 17, 17,... Of the rectangular cylinder are positioned against the inner peripheral surface of the main body 9, and spaces 15, 15,... Are formed between the respective serrated helical photocatalyst networks 16, 16,.・ It is provided. Of course, the shape of the sawtooth helical photocatalyst net 16 can be formed as a cylinder that is slightly smaller than the main body 9. A sawtooth-shaped spiral photocatalyst net 18 shown in FIG. 3 is mounted substantially horizontally between the ultraviolet lamp 13 and the ultraviolet lamp 14 which are arranged to cross each other at a predetermined distance.

  The sawtooth helical photocatalyst uses a cut piece made by cutting a titanium material. And this titanium oxide film is formed in the surface by heating this cutting piece in inert atmosphere, and cooling after that. A cutting piece made by cutting a titanium material generally has a spiral shape with an irregular cross section, and the surface thereof has a fine uneven shape. And the ridgeline of the cutting piece is a sharp sawtooth-shaped protrusion, but the surface area of the titanium dioxide coating is large due to the fine surface irregularity, and the contact efficiency that can supplement ultraviolet rays, ultrasonic waves, bacteria, etc. in water improves. .

By the way, in order to raise the bactericidal effect, the water purification apparatus 1 of this invention is comprised so that a specific example may be shown in FIG. In order to improve the bactericidal effect, the ultraviolet light exposure (mJ / cm ² ) may be increased. The ultraviolet ray exposure amount (mJ / cm ² ) = ultraviolet ray illuminance (mw / cm ² ) × time (sec) is expressed by the formula. Needs to stay longer.

  The main body 9 has a cylindrical shape for the purpose of extending the residence time of the inflowing bath liquid 21 by increasing the internal volume while saving space and increasing the amount of UV exposure. And by making the diameter of the main body 9 larger than the diameter of the supply port 10, the flow of the bath liquid 21 flowing into the main body 9 becomes gentle, the irradiation time of ultraviolet rays becomes longer, and the exposure amount can be increased.

The relationship between the bore size (inner diameter) and the residence time is
The flow rate S (cc / sec) = r ² π × V ₁ = R ² π × V ₂ .
Here, V ₁ : Flow velocity at the supply / discharge port V ₂ : Flow velocity inside the main body r: Radius of supply / discharge port R: Radius of the main body From this equation, the flow rate is inversely proportional to the square of the diameter, and the residence time is the flow rate If it is fast, the time will be short, and conversely if the flow rate is slow, it will become long.

  Therefore, in the present invention, the flow velocity of the supply port and the discharge port and the average flow velocity in the main body are set to 1: 50-60. Of course, the average flow velocity in the supply and discharge ports and the main body is not limited to the above ratio, but the inner diameter dimensions of the supply and discharge ports and the main body can be changed according to the flow rate and flow rate used based on this value. It is also possible to change the flow rate ratio depending on the type and nature of the fluid to be processed.

  In the water purification apparatus of the above embodiment, the main body 9 has a cylindrical shape, so that the range of ultraviolet rays reaching the inner peripheral surface can be made uniform and an effective sterilizing effect can be obtained. Further, the ultraviolet lamp 13 and the ultraviolet lamp 14 cross each other vertically at a predetermined interval. The ultraviolet transmittance varies greatly depending on the water quality, and in order to cope with this change, the ultraviolet lamp 13 and the ultraviolet lamp 14 cross each other, and the effect of irradiating a wide range is obtained while extending the ultraviolet exposure time. In the main body 9 of the water purification device 1, the distance between the upper inner surface 19, the ultraviolet lamp 14, the ultraviolet lamp 13, and the lower inner surface 20 is approximately 1: 1: 1.2.

  Further, the water purification apparatus 1 of the present invention has an ultrasonic vibrator 12 attached to the bottom surface of the main body 9 thereof. The inside of the main body 9 is cleaned and the adhesion of dirt is prevented by the cavitation and nano-valve phenomenon caused by the ultrasonic vibrator 12. Furthermore, contamination of the inflow pipe 8 from the discharge port to the bathtub can be prevented by using ultrasonic permeability.

  In the embodiment of the present invention, the two ultraviolet lamps 13 and the ultraviolet lamps 14 are mounted inside the main body 9 so as to cross each other. There may be four, and the number of ultraviolet lamps is not limited.

DESCRIPTION OF SYMBOLS 1 Water quality washing apparatus 2 Bathtub 3 Circulation pump 4 Filter 5 Hair collection machine 6 Sodium hypochlorite tank 7 Outflow pipe 8 Inflow pipe 9 Main body
10 Bath liquid supply port
11 Bath liquid outlet
12 Ultrasonic transducer
13 UV lamp
14 UV lamp
15 space
16 Sawtooth spiral photocatalytic network
17 Corner
18 sawtooth spiral photocatalyst
19 Upper inner surface
20 Lower inner surface
21 Bath liquid

Claims (1)

Hot, public baths, in water purification apparatus to kill bacteria contained in the water or pool water, the body of the circular cylindrical disposed serrated spiral-shaped photocatalyst network in a square tubular, square tube The two corners are positioned in contact with the inner peripheral surface of the main body, and a predetermined space is left between the inner surface and the two ultraviolet lamps are attached to each other so as to cross each other. Interposes the sawtooth helical photocatalyst network, attaches an ultrasonic vibrator to the bottom of the main body, further provides a supply port for flowing into the main body at the bottom, and provides a discharge port at the top, the sawtooth helical shape photocatalyst network using the cutting piece can by cutting the titanium material, the cutting piece is heated in an inert atmosphere, then the surface by cooling obtained by forming a titanium dioxide coating, the inlet and outlet And the average flow velocity in the body is 1:50 60 and then, and the inner surface on the body, both ultraviolet lamps arranged cross each other, the distance between the bodies under the inner surface 1: 1: water purification device being characterized in that a 1.2 ratio of.

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