JP2012143731A - Ultraviolet ray irradiation apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ultraviolet ray irradiation apparatus by which water treatment by ultraviolet rays can be certainly and efficiently performed even to water to be treated of low ultraviolet ray transmittance.SOLUTION: The ultraviolet ray irradiation apparatus 100 includes a treatment container 12 which has a window member 19 with ultraviolet ray transmissivity, an internal space 16 filled with water to be treated and a bottom 21 capable of moving in a height direction of the internal space 16, an ultraviolet ray lamp 14 which is arranged to face the window member 19 and irradiates the internal space 16 with ultraviolet ray via the window member 19, an ultraviolet ray sensor 26 which is arranged in the treatment container 12 and receives ultraviolet rays from the ultraviolet ray lamp 14 via water to be treated and a controlling part 31 which regulates height of the internal space by moving the bottom 21 on the basis of ultraviolet ray quantity received by the ultraviolet ray sensor 26.

Description

  Embodiments of the present invention relate to an ultraviolet irradiation apparatus that performs processing such as sterilization, inactivation, and organic matter decomposition of fluids such as tap water, sewage, seawater, aquaculture water, and reclaimed water using an ultraviolet lamp.

  In the conventional ultraviolet sterilizer, a protective tube that separates the water to be treated and the ultraviolet lamp is attached to the center of the ultraviolet irradiation tank provided with an inlet and an outlet, and the ultraviolet lamp is installed therein.

  Further, a water pipe made of an ultraviolet light permeable material through which water to be treated flows is installed inside the casing for preventing ultraviolet leakage, and is sterilized by an ultraviolet lamp fixed by a lamp holder.

JP 2009-148657 A JP-A-5-253565

  The conventional ultraviolet irradiation apparatus sets the to-be-processed water passed through a tank beforehand, and manufactures the processing tank based on the water quality. Therefore, in the case of the water to be treated having a lower ultraviolet transmittance than that of the water to be treated, there are problems that it cannot be efficiently treated or the treatment is insufficient.

  In view of this, an ultraviolet irradiation device capable of reliably and efficiently performing water treatment with ultraviolet rays even on water to be treated with low ultraviolet transmittance is provided.

  An ultraviolet irradiation device according to an embodiment includes an ultraviolet transmissive window member and an internal space that fills water to be treated, and a processing container that includes a bottom that is movable in the height direction of the internal space, and is disposed opposite to the window member. An ultraviolet lamp that irradiates the internal space with ultraviolet rays through the window member, an ultraviolet sensor that is disposed in the treatment container and receives ultraviolet rays from the ultraviolet lamp through the water to be treated, and the ultraviolet rays And a controller that moves the bottom and adjusts the height of the internal space based on the amount of ultraviolet light received by the sensor.

It is a disassembled perspective view for demonstrating 1st Embodiment regarding an ultraviolet irradiation device. FIG. 2 is a cross-sectional view for explaining the assembled state and the control system in FIG. 1. It is sectional drawing for demonstrating the state which changed the processing tank depth shown in FIG. It is a block diagram for demonstrating an example of the ultraviolet lamp used by each embodiment regarding an ultraviolet irradiation device. It is sectional drawing for demonstrating 2nd Embodiment regarding an ultraviolet irradiation device. FIG. 6 is a sectional view taken along line Ia-Ib in FIG. 5. It is sectional drawing for demonstrating 3rd Embodiment regarding an ultraviolet irradiation device.

  Hereinafter, embodiments will be described in detail with reference to the drawings.

(First embodiment)
1-4 is for demonstrating 1st Embodiment regarding an ultraviolet irradiation device, FIG. 1 is an exploded perspective view, FIG. 2 is sectional drawing which showed the assembly state and control system of FIG. FIG. 3 is a cross-sectional view showing a state in which the position of the treatment tank depth adjusting mechanism of FIG. 2 is changed, and FIG. 4 is a configuration diagram for explaining an example of an ultraviolet light source used in this embodiment.

  In FIG. 1 and FIG. 2, reference numeral 100 denotes an ultraviolet irradiation device that includes a lamp house 11 and a processing container 12 and performs sterilization treatment by irradiating water to be treated such as tap water with ultraviolet rays. The lamp house 11 has a box shape in which the upper surface is closed and the opening 13 is provided on the side close to the lower surface. In the lamp house 11, for example, an ultraviolet lamp 14 that is a light source capable of emitting ultraviolet rays of 180 to 400 nm is disposed. In the lamp house 11, reflectors 151 and 152 are arranged so as to reflect the ultraviolet rays generated by the ultraviolet lamp 14 toward the opening 13, that is, the processing container 12 side.

  Here, the ultraviolet lamp 14 will be further described with reference to FIG. 4. The ultraviolet lamp 14 is a so-called electrodeless lamp having no electrode. Reference numeral 141 denotes an ultraviolet transmissive cylindrical bulb made of, for example, quartz glass, and has an outer diameter φ of about 15 ± 1 mm and a length L of about 240 mm. In the light emitting space of the bulb 141, for example, an inert gas and a discharge medium mainly composed of mercury and iron are enclosed. Support portions 142 and 143 are integrally formed at both ends of the bulb 141, and the ultraviolet lamp 14 is fixed to the lamp house 11 by the support portions 142 and 143. The ultraviolet lamp 14 configured in this manner generates ultraviolet rays having a wavelength of 180 to 400 nm based on the discharge medium enclosed in the bulb 141 by being irradiated with microwaves generated using a magnetron (not shown). Let

  The processing container 12 is a cylinder formed of a corrosion-resistant metal such as stainless steel, and an internal space 16 for water treatment is formed inside. A lid 18 is disposed in the upper opening 17 of the processing container 12. The lid 18 is bonded to a gutter integrally formed on the inner surface of the processing container 12 with an adhesive or the like so as not to leak water. The lid 18 may be configured integrally with the processing container 12. The lid 18 is fitted with a window member 19 made of quartz glass or the like having excellent ultraviolet transparency.

  An outlet 20 for discharging the water to be treated is formed in the vicinity of the upper opening 17 on the side wall of the processing vessel 12. Reference numeral 21 denotes a bottom that is movable in the height direction of the internal space 16 in the processing container 12, that is, up and down. A packing 22 is attached to the outer periphery of the bottom portion 21, so that water to be treated does not leak from the gap between the bottom portion 21 and the processing container 12 even when the water to be treated is supplied to the internal space 16. An ultraviolet transmissive transmitting member 23 made of, for example, quartz glass is fitted into the center of the bottom 21. An inlet 24 for supplying water to be treated is formed in a portion between the permeable member 23 and the packing 22 of the bottom portion 21. Note that pipes (not shown) are connected to the inlet 24 and the outlet 20 so that the water to be treated can be supplied and discharged inside and outside the internal space 16. Thus, by forming the inflow port 24 at the bottom 21 and the outflow port 20 on the side wall of the processing vessel 12 near the upper opening 17, the water to be treated taken into the inflow port 24 can be either a shallow position or a deep position. Since this position also passes through and is sent out from the outlet 20, the water to be treated is uniformly irradiated with ultraviolet rays in this process, and a reliable sterilization treatment can be performed.

  A support member 25 that supports the bottom portion 21 is disposed on the lower surface side of the bottom portion 21. A concave portion 251 is formed on the upper surface of the support member 25, and the ultraviolet sensor 26 is disposed in the concave portion 251. Since the ultraviolet sensor 26 is disposed so that the light receiving portion faces the transmitting member 23, it is possible to receive ultraviolet rays through the transmitting member 23. The ultraviolet sensor 26 may be directly attached to the bottom portion 21 on the support member 25 side using a fixing means such as an adhesive with the light receiving portion side facing.

  A support shaft 27 having a gear 271 formed on the outer periphery is fixed to the bottom of the support member 25. Reference numeral 28 denotes a rotating gear meshed with the gear 271, and the rotating gear 28 is attached to the rotating shaft 30 of the motor 29. By rotating the motor 29 clockwise or counterclockwise, the support shaft 27 can be moved up and down, and the bottom 21 can be moved up and down via the support member 25. That is, the motor 29 and the support shaft 27 function as a space changing structure that changes the width of the internal space 16. These space changing structures are driven by the drive unit 32, and the drive unit 32 is controlled by the control unit 31. In addition, as a space change structure, the support rod itself for moving up and down the processing tank with the screw formed on the peripheral surface may be directly rotated by a motor, or may be moved up and down by a hydraulic jack. Further, the bottom portion may be moved up and down by an elevator vertical means using a wire, a chain, a gear or the like.

  Next, the operation of the embodiment will be described with reference to FIGS. 2 and 3.

  When ultraviolet light is irradiated from the ultraviolet lamp 14 in a state where the water to be treated is supplied to the internal space 16, the ultraviolet light enters the ultraviolet sensor 26 through the window member 19, the water to be treated, and the transmission member 23. The ultraviolet sensor 26 measures the amount of ultraviolet light that has passed through the water to be treated, and the information is transmitted to the control unit 31. The control unit 31 specifies the quality of the water to be treated, particularly the transmittance, from the received information on the amount of ultraviolet rays. More specifically, a ROM (Read Only Memory) provided in the control unit 31 stores in advance the ultraviolet data relating to the transmittance and the positional relationship between the bottom 21 and the detection result of the ultraviolet sensor 26 and the ultraviolet data of the storage element. By performing the calculation, the permeability of the water to be treated is estimated. Then, based on the measurement result of the transmittance of the water to be treated, the control unit 31 controls the drive unit 32 so as to drive the rotating gear 28 of the motor 29 in the clockwise direction or the counterclockwise direction, thereby moving the bottom portion 21 up and down. Let

  That is, as a result of the measurement of the amount of ultraviolet rays by the ultraviolet sensor 26, when it is determined that the transmittance of the water to be treated is high, the bottom 21 is lowered as shown in FIG. . Conversely, when it is determined that the transmittance of the water to be treated is low, adjustment is performed so that the water to be treated becomes shallower by raising the bottom 21 as shown in FIG. Thus, the ultraviolet irradiation process can be reliably and efficiently performed by raising and lowering the bottom 21 depending on the transmittance of the water to be treated and setting the depth to a suitable depth for each water to be treated.

  In addition, since the ultraviolet output of the ultraviolet lamp 14 may change greatly due to replacement with different types of lamps, change in input power, lamp life, etc., the amount of ultraviolet rays can also be used as information to change the depth of water to be treated. Is preferred. That is, the transmittance of the water to be treated and the positional relationship between the amount of ultraviolet rays and the bottom 21 are stored in advance in the ROM of the control unit 31, and the bottom 21 is determined from the amount of ultraviolet rays measured by the ultraviolet sensor 26 and the transmittance of the water to be treated. The water to be treated can be made to a more desirable depth by moving up and down.

  Here, the measurement of the transmittance of the water to be treated may be performed only when the type or quality of the water to be treated is changed, or may be periodically performed after a certain treatment time has elapsed. Further, by storing information such as a suitable flow rate for each transmittance in the control unit 31, not only the bottom portion 21 is moved up and down, but also the flow rate of the water to be treated may be changed. Further, an ultraviolet sensor for measuring the ultraviolet output of the ultraviolet lamp 14 may be separately provided at a position closer to the ultraviolet lamp 14 than the opening 13, for example, in the opening 13, the lamp house 11, or the side walls of the reflectors 151 and 152. As a result, the amount of ultraviolet light before and after passing through the water to be treated can be measured, so that the transmittance of the water to be treated can be accurately grasped even if the ultraviolet light output of the ultraviolet lamp 14 changes. 21 can be controlled to a suitable height.

  In this embodiment, the transmittance of the water to be treated is measured by the ultraviolet sensor 26, and the bottom 21 is moved up and down by the control unit 31 based on the measurement result of the transmittance by the ultraviolet sensor 26, thereby optimally treating the water to be treated. By setting the treatment tank depth, the water to be treated can be treated reliably and efficiently.

  Moreover, since the ultraviolet lamp 14 has both the function of measuring the transmittance of water to be treated and the function of ultraviolet irradiation treatment, it is possible to realize an ultraviolet irradiation apparatus with a small number of components.

(Second Embodiment)
FIG. 5 is a cross-sectional view for explaining a second embodiment relating to the ultraviolet irradiation device, and FIG. 6 is a cross-sectional view taken along the line Ia-Ib of FIG. The same functional parts as those in the first embodiment will be described with the same reference numerals.

  In this embodiment, a plurality of internal spaces are formed in the depth direction inside the processing container, and one or a plurality of the internal spaces are filled with the water to be treated, so that the water to be treated is irradiated with ultraviolet rays. I try to change the depth.

  More specifically, between the bottom portion 211 inside the processing container 12 and the window member 191, ultraviolet transmissive partition members 192 and 193 made of, for example, quartz glass are arranged at substantially the same interval. Arrangement of the partition members 192 and 193 is performed by a trough (not shown) formed in the processing container 12. Thereby, the internal space of the processing container 12 is divided into three stages in the vertical direction, the internal space 161 as the first internal space in the upper stage, the internal space 162 as the second internal space in the middle stage, and the third internal space in the lower stage. An internal space 163 is formed as a space. That is, the processing container 12 includes a space changing structure that can change the width of the internal space into three types. In these internal spaces 161 to 163, the inflow port 241 and the outflow port 201 are connected to the internal space 161, the inflow port 242 and the outflow port 202 are connected to the internal space 162, and the inflow ports 243 and 163 are connected to the internal space 163. An outlet 203 is formed. Since these internal spaces 161 to 163 are in an independent state, the water to be treated is not in a state where they pass each other.

  Reference numeral 51 denotes a supply pipe for supplying water to be treated. The supply pipe 51 branches from the middle of the supply pipe 51 to the branch pipes 511 to 513. The pipe 511 is connected to the inlet 241; the pipe 512 is connected to the inlet 242; Each is coupled to an inlet 243. At this time, the total cross-sectional area of the branch pipes 511 to 513 and the cross-sectional area of the supply pipe 51 are the same size. This is to suppress the generation of bubbles in the pipe that act as a lens and may cause the ultraviolet irradiation direction to differ from the design value. The branch pipes 511 to 513 are provided with electromagnetic valves 521 to 523 for controlling the flow of the water to be treated, respectively.

  Reference numerals 531 to 533 are discharge pipes for discharging the water to be treated processed in the internal spaces 161 to 163. The pipe 531 is the outlet 201, the pipe 532 is the outlet 202, and the pipe 533 is the outlet 203. Each is combined. The other ends of the pipes 531 to 533 are connected by a water supply pipe 53. That is, the water to be treated that has flowed through the pipes 531 to 533 is joined by the water supply pipe 53.

  Next, the operation of the second embodiment will be described. It is assumed that the ultraviolet lamp 14 is turned on in a state where the water to be treated is filled in the internal spaces 161 to 163. Then, the ultraviolet sensor 26 disposed on the bottom 211 receives the ultraviolet light from the ultraviolet lamp 14 through the window member 191, the water to be treated filled in the internal spaces 161 to 163, the partition members 192 and 193, and the transmission member 23. To do. The amount of ultraviolet rays is measured by the ultraviolet sensor 26, and the information is transmitted to the control unit 31. And the control part 31 specifies the transmittance | permeability of to-be-processed water, and controls opening / closing of the electromagnetic valves 521-523 based on the measurement result of the to-be-processed water transmittance | permeability.

  That is, as a result of measuring the amount of ultraviolet rays by the ultraviolet sensor 26, when it is determined that the transmittance of the water to be treated is high, the electromagnetic valves 521 to 523 are opened to supply the water to be treated to the internal spaces 161 to 163, Adjustment is performed so that the thickness of the water to be treated through which ultraviolet rays pass becomes deep as a whole. Conversely, when it is determined that the transmittance of the water to be treated is low, the electromagnetic valves 522 and 523 are closed to supply the water to be treated only to the internal space 161, or the electromagnetic valve 523 is closed and the internal spaces 161 and 162 are closed. To be treated, the water to be treated is adjusted to be shallow as a whole. Thus, the ultraviolet irradiation treatment can be reliably and efficiently performed by changing the internal space through which the water to be treated flows according to the transmittance of the water to be treated and setting the depth to be suitable for each water to be treated.

  In addition, not only does it require a large mechanical structure to move the bottom, but also controls the opening and closing of the solenoid valve to perform the treatment in a timely manner according to the state of UV transmittance of the water to be treated. Can do.

  Note that the number of internal spaces to be divided is not limited to three, and there is no problem even if the number is two, or four or more. Moreover, it is not necessary to measure the permeability of the water to be treated in a state where all the internal spaces are filled with the water to be treated. If the depth and permeability of the water to be treated are related, It may be performed only in a state where the water to be treated is filled.

(Third embodiment)
FIG. 7 is a cross-sectional view for explaining a third embodiment relating to the ultraviolet irradiation device.

  In this embodiment, a processing container is configured by combining a plurality of containers having independent spaces inside.

  If demonstrating it concretely, the processing container 12 will be comprised by stacking three containers 121-123 each provided with internal space 164-166 inside vertically. The container 121 has a window member 191 on the ultraviolet lamp 14 side, a partition member 71 on the bottom 211 side, a container 122 has a partition member 72 on the ultraviolet lamp 14 side, a partition member 73 on the bottom 211 side, and an ultraviolet lamp 14 side on the container 123. The partition members 74 are fitted into the respective parts. Each of the window members 191 and 71 to 74 is made of ultraviolet transmissive glass such as quartz glass, and the ultraviolet rays from the ultraviolet lamp 14 can be applied to any of the internal spaces 164 to 166. Therefore, in the present embodiment, similarly to the second embodiment, the water to be treated is supplied to any or all of the internal spaces 164 to 166 based on the measurement result of the transmittance of the water to be treated by the ultraviolet sensor. By setting the depth suitable for each water to be treated, the ultraviolet irradiation treatment can be reliably and efficiently performed.

  As shown in FIG. 7, a plurality of ultraviolet sensors may be provided. That is, the ultraviolet sensors 261 to 263 may be disposed on the partition members 71 and 73 and the bottom portion 211, respectively. By providing the ultraviolet sensors 261 to 263 for the internal spaces 164 to 166 in this way, it becomes possible to measure the transmittance of the water to be treated with higher accuracy, and even if an abnormality or failure of the ultraviolet sensor occurs, the measurement is not affected. Treated water can be treated.

  A person skilled in the art can make various modifications and changes without departing from the technical concept and technical scope of the present invention.

  For example, in the first to third embodiments, since the ultraviolet lamp 14 and the space changing structure are arranged in a vertical relationship, the height of the internal space is changed. And the space changing structure may be arranged in a side-by-side relationship to change the width of the internal space.

  The ultraviolet lamp 14 only needs to be a light source that can emit ultraviolet rays in the vicinity of 180 to 400 nm, and can be replaced with a metal halide lamp, a low-pressure mercury lamp, an HID lamp, a UV-LED, or the like.

  The ultraviolet sensor 26 does not need to measure the water to be treated based on the ultraviolet light from the ultraviolet lamp 14. For example, a UV-LED or the like is separately provided as a light source for measuring the transmittance of the water to be treated inside or outside the treatment container or pipe. The transmittance of the water to be treated may be measured by the light source.

  The sensor may be a turbidity sensor capable of measuring the turbidity of the water to be treated, an impurity detection sensor capable of measuring the purity, in addition to the ultraviolet sensor capable of measuring the transmittance of the water to be treated. . In short, it is only necessary to be able to measure the quality of the water to be treated to such an extent that conditions for suitable ultraviolet irradiation can be determined.

  In the second and third embodiments, the electromagnetic valve does not completely stop the supply of treated water, but adjusts the flow rate of treated water for each internal space based on the amount of ultraviolet light detected by the ultraviolet sensor. Is also possible. For example, when the transmittance of the water to be treated is low, the flow rate of the water to be treated flowing into the internal space on the side far from the ultraviolet lamp is set slower than the side near the ultraviolet lamp by a predetermined amount.

  That is, a treatment container having an ultraviolet transparent window member and an internal space filled with water to be treated, an ultraviolet transparent partition plate that divides the internal space into first and second internal spaces, and facing the window member An ultraviolet lamp that is disposed and irradiates the first and second internal spaces with ultraviolet rays through the window member, an ultraviolet sensor that receives ultraviolet rays from the ultraviolet lamp through the water to be treated, and the ultraviolet sensor And a controller that controls the flow rate of the water to be treated supplied to the first and second internal spaces based on the amount of ultraviolet rays received by the first and second internal spaces.

  Although several embodiments have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 100 Ultraviolet irradiation apparatus 12 Processing container 14 Ultraviolet lamp 16,161-166 Internal space 19,191 Window member 192,193,71-74 Partition member 21 Bottom part 26,261-263 Ultraviolet sensor 31 Control part 521-523 Electromagnetic valve

Claims (3)

A processing container having an inner space filled with an ultraviolet light transmissive window member and water to be treated, and a bottom that is movable in the height direction of the inner space;
An ultraviolet lamp disposed opposite to the window member and irradiating the internal space with ultraviolet rays through the window member;
An ultraviolet sensor that is disposed in the treatment container and receives ultraviolet rays from the ultraviolet lamp through the treated water;
An ultraviolet irradiation apparatus comprising: a control unit configured to move the bottom and adjust the height of the internal space based on the amount of ultraviolet light received by the ultraviolet sensor. A treatment container having an interior space filled with an ultraviolet-transmissive window member and water to be treated;
An ultraviolet transmissive partition plate that divides the internal space into first and second internal spaces;
An ultraviolet lamp disposed opposite to the window member and irradiating the first and second internal spaces with ultraviolet rays through the window member;
An ultraviolet sensor that receives ultraviolet rays from the ultraviolet lamp through the treated water;
Control whether to supply the treated water to the first or second internal space or to supply the treated water to the first and second internal spaces based on the amount of ultraviolet light received by the ultraviolet sensor. And an ultraviolet irradiation device characterized by comprising: A processing container provided with a space changing structure capable of changing the length of the internal space, as well as an internal space that fills the ultraviolet light transmissive window member and the water to be treated;
An ultraviolet light source that irradiates the internal space with ultraviolet light through the window member;
A sensor capable of measuring the quality of the treated water;
A controller that controls the space changing structure so that the ultraviolet light from the ultraviolet light source can be irradiated over the entire width direction of the treated water based on the quality of the treated water measured by the sensor. An ultraviolet irradiation device characterized by that.

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