JP2008062203A - Water treatment system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water treatment system in which the fluid to be treated can be separated into solid content such as algae, broken pieces of a lamp or a protective tube and mercury, which are contained in the fluid to be treated, and treated water and in the ultraviolet irradiation apparatus of which the solid content such as algae is not accumulated. <P>SOLUTION: Since the fluid to be treated is separated into the solid content contained in the fluid to be treated and the treated water and solid content-containing waste water and the treated water are discharged separately in the ultraviolet irradiation apparatus 1, the fluid to be treated can be separated into the solid content such as algae, broken pieces of the lamp or the protective tube and mercury, which are contained in the fluid to be treated, and the treated water. Since the solid content is removed from the waste water discharged from the ultraviolet irradiation apparatus 1 in a solid-liquid separation apparatus 3, the solid content such as algae in the fluid to be treated can not be accumulated in the ultraviolet irradiation apparatus 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a water treatment system for performing water purification treatment by irradiating water to be treated with ultraviolet rays.

  Conventionally, in a water treatment system represented by water supply, a basic purification treatment process including aggregation, precipitation, filtration, and chlorination is performed. This type of water treatment system has been operated on the basis of chlorination for sterilization in particular from the viewpoint of hygienic safety.

  However, in recent years, water pollution accidents have occurred due to pathogenic microorganisms such as Cryptosporidium and Giardia, which are difficult to disinfect with chlorine. In addition, in water treatment systems, the generation of a large amount of algae due to eutrophication and the progress of organic pollution in lakes, dams, and rivers that are tap water sources causes off-flavors, coloring disturbances, aggregation, precipitation inhibition, filtration clogging, filtration Problems such as water leakage have occurred. Further, in the water treatment system, there is a problem that the chlorine agent injected in the chlorine sterilization treatment reacts with organic substances in the raw water to produce harmful by-products (such as trihalomethane).

  As described above, the conventional water treatment system has a problem that cannot be handled by operation based on chlorination.

  From the viewpoint of solving such problems, sterilization using ultraviolet irradiation (hereinafter, also referred to as ultraviolet disinfection) is drawing attention as an alternative sterilization technique for chlorination. The UV disinfection technology (1) eliminates the need for complicated chemical injection management, (2) does not produce harmful by-products, and (3) has the effect of damaging the growth ability of Cryptosporidium and eradicating infectivity (4) There is an advantage that algae contained in the raw water can be effectively prevented from breeding.

  For this reason, in a water treatment system such as a water purification plant, ultraviolet irradiation treatment may be employed to oxidize microorganisms and residual organic matter. Since the ultraviolet irradiation treatment is effective for water having a high ultraviolet light transmission efficiency, it is usually applied to filtered treated water or coagulated / precipitated treated water.

  On the other hand, when clean water such as ground water is used as the water source, filtration treatment, aggregation, or precipitation treatment is not performed, but the raw water is subjected to ultraviolet irradiation treatment to inactivate microorganisms such as Cryptosporidium, and then in the water pipe. A chlorine-based disinfectant capable of suppressing bacterial growth is injected, and the obtained tap water is supplied to the user.

Then, the water treatment technique by such ultraviolet irradiation is demonstrated concretely.
The ultraviolet light source is a low-pressure or encapsulated mercury vapor as an ultraviolet lamp that emits ultraviolet rays in the 200 nm to 300 nm wavelength region called UV-C band, which is effective for disinfection of microorganisms such as pathogenic protozoa, pathogens, bacteria, and viruses. Medium pressure mercury lamps have been proposed. It should be noted that the microorganisms to be sterilized differ in the amount of ultraviolet irradiation necessary for sterilization for each microbial species.

  As an ultraviolet irradiation apparatus using an ultraviolet lamp, an apparatus in which one or a plurality of ultraviolet lamps are arranged in a cylindrical container in which a fluid to be treated is circulated in parallel with the central axis of the container is known (for example, Non-patent document 1). In this type of ultraviolet irradiation apparatus, it is necessary to irradiate microorganisms with an amount of ultraviolet rays necessary for disinfection in a short time during which the fluid to be treated flows through the container.

  However, the amount of ultraviolet rays actually irradiated to the microorganisms is proportional to the transmission efficiency of the ultraviolet rays in the fluid to be treated. Since the transmission efficiency of ultraviolet rays varies depending on the turbidity and chromaticity of the fluid to be treated, it is difficult to properly maintain the irradiation amount of ultraviolet rays. For example, when the turbidity of the fluid to be treated is high, the transmission efficiency of ultraviolet rays decreases, and the amount of ultraviolet rays is likely to be insufficient. On the other hand, when the turbidity of the fluid to be treated is low, the ultraviolet light transmission efficiency increases, so the amount of ultraviolet light irradiation tends to be excessive.

  From the viewpoint of eliminating this difficulty, a technique for appropriately adjusting the irradiation amount of ultraviolet rays by controlling the flow rate of the raw water according to the turbidity of the raw water detected by a turbidimeter has been proposed (for example, patent document). 1). In this patent document 1, it is proposed to use ultraviolet irradiation at the time of the disappearance treatment of underwater plankton, such as a reservoir.

  In addition, a technique has been proposed in which a fine particle meter is installed in place of the turbidimeter, and the ultraviolet ray irradiation amount is controlled using the output of the fine particle meter (see, for example, Non-Patent Document 2). Furthermore, an ultraviolet irradiation system that controls the output of an ultraviolet lamp using an output obtained from a turbidimeter and a particle meter has been proposed (see, for example, Patent Document 2).

  In addition, considering the attenuation characteristic of ultraviolet intensity (illuminance) (the property that the intensity of ultraviolet light attenuates according to the square of the distance from the ultraviolet lamp), the fluid to be treated always flows in the vicinity of the ultraviolet lamp while swirling. There has been proposed an ultraviolet irradiation technique in which the arrangement of the inlet pipe and the outlet pipe of the container is devised (see, for example, Patent Documents 3 and 4).

  In most cases, the ultraviolet irradiation technique as described above has a structure in which an ultraviolet lamp is housed in a protective tube. However, since the protective tube must transmit ultraviolet rays without being attenuated, a material that is relatively weak against impact, such as crystalline quartz or synthetic quartz glass, is used. Along with this, in the ultraviolet irradiation system, the protective tube and the ultraviolet lamp may be damaged due to excessive force or sudden impact. When the ultraviolet lamp or the protective tube is broken, there is a disadvantage that mercury or quartz glass fragments in the lamp are mixed into the processing fluid.

  As a technology to eliminate this inconvenience, an ultraviolet irradiation system that prevents the spread of mercury contamination in the ultraviolet irradiation device by blocking water flow to the ultraviolet irradiation device when the sensor detects a breakage of the ultraviolet lamp is proposed. (For example, refer to Patent Document 5). However, there is a concern that treated water contaminated with mercury in the ultraviolet irradiation device may be mixed into the downstream water purification process until the water flow to the ultraviolet irradiation device is shut off.

On the other hand, in Patent Document 3 described above, in order to eliminate the concern that the treated water contaminated with mercury is mixed into the downstream water purification process, by adding a solid-liquid separation function to the ultraviolet irradiation device, such as mercury and debris Techniques for separating solids from treated water have been proposed.
JP 05-169059 A JP 2004-188273 A Japanese Patent Application No. 2005-31820 Specification Japanese Patent Application No. 2005-347069 JP 2004-188274 A “ULTRAVIOLET DISINFECTION GUIDANCE MANUAL.”, United States Environmental Protection Agency, June 2003, Draft. Shigeo Kimura et al., “Survey on Basic Performance Evaluation of Particle Measuring Instruments”, Journal of Water Supply Association, Vol. 71, No. 10, pp. 31-51, published in October 2002

  In the technique described in Patent Document 3 as described above, it is considered that there is no particular problem when the water to be treated does not contain much solid content.

  However, according to the study of the present inventor, the technique described in Patent Document 3 makes it easier for solids such as algae to accumulate in the solid-liquid separation function when the water to be treated contains a large amount of solids such as algae. There is room for improvement.

  For example, consider a case in which solids such as algae and suspended solids are contained in the water to be treated flowing into the ultraviolet irradiation device due to a large amount of algae or rainfall. In this case, in the ultraviolet irradiation device, if a large amount of these solids accumulates at the location where the fragments are collected, the solids may corrode and cause sanitary problems. There is a possibility that it will flow into the water purification process.

  Therefore, the technique described in Patent Document 3 is provided in the case where the water to be treated contains a large amount of solids such as algae, such as when a large amount of algae are generated or during rainfall, and the solids such as algae are stored in an ultraviolet irradiation device. It is necessary to avoid it. However, this is not the case when the water to be treated does not contain a large amount of solids such as algae as usual.

  The present invention has been made in consideration of the above circumstances, and can separate the algae in the fluid to be treated, solids such as lamp / protection tube fragments and mercury, and the treated water, and the algae in the fluid to be treated, etc. It is an object of the present invention to provide a water treatment system capable of preventing solids from being accumulated in an ultraviolet irradiation device.

  1st invention is the water treatment system which irradiates a to-be-processed fluid with an ultraviolet-ray, and performs a water purification process, In the container into which the said to-be-processed fluid flows in, the 1 thru | or several ultraviolet-ray separately accommodated in the protective tube A lamp is disposed, and the fluid to be treated flowing in the container is irradiated with ultraviolet rays from the ultraviolet lamp, separated into solid content and treated water contained in the fluid to be treated, and wastewater and treatment containing the solid content. It is a water treatment system provided with an ultraviolet irradiation device that discharges water separately and a solid-liquid separation device that removes solids from waste water discharged from the ultraviolet irradiation device.

  According to a second aspect of the present invention, in the water treatment system for performing the water purification treatment by irradiating the fluid to be treated with ultraviolet rays, one or a plurality of ultraviolet rays individually housed in a protective tube in a container into which the fluid to be treated flows. A lamp is disposed, and the fluid to be treated flowing in the container is irradiated with ultraviolet rays from the ultraviolet lamp, separated into solid content and treated water contained in the fluid to be treated, and wastewater and treatment containing the solid content. A water treatment system comprising: an ultraviolet irradiation device that discharges water separately; and a solid-liquid separation device that is provided upstream of the ultraviolet irradiation device and that separates and removes solids in a fluid to be treated in advance. is there.

(Function)
In each of the first and second inventions, the ultraviolet irradiation device separates the solid content and the treated water contained in the fluid to be treated and discharges the waste water containing the solid content and the treated water separately. Solids such as algae, lamp / protection tube fragments and mercury can be separated from the treated water, and the solid-liquid separator removes the solids from the wastewater discharged from the UV irradiation device. It is possible to prevent the solid matter such as algae from being accumulated in the ultraviolet irradiation device.

  As described above, according to the present invention, solids such as algae in the fluid to be treated, broken pieces of lamps / protection tubes and mercury and treated water can be separated, and solids such as algae in the fluid to be treated can be separated. It is possible to prevent accumulation in the ultraviolet irradiation device.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a schematic diagram showing a configuration of a water treatment system according to the first embodiment of the present invention. The water treatment system includes an ultraviolet irradiation device 1 that separates solids contained in the water to be treated and treated water while irradiating the water to be treated flowing through a pipe (hereinafter referred to as a water to be treated line) with ultraviolet rays. Pump 2 and solid-liquid separator 3 installed in a pipe (hereinafter referred to as a drainage line) for discharging the waste water containing the separated solids, and a pipe (hereinafter referred to as treated water) from which the treated water is discharged from the ultraviolet irradiation device 1. And a valve 4 installed in a line). The order of the pump 2 and the solid-liquid separator 3 may be reversed.

  Here, as shown in FIGS. 2 and 3, the ultraviolet irradiation device 1 includes one or more ultraviolet lamps 9 individually housed in a protective tube 10 in a container 5 into which water to be treated flows. In addition, the water to be treated flowing in the container 5 is irradiated with ultraviolet rays from the ultraviolet lamp 9 and separated into the solid content and the treated water contained in the treated water, and the waste water containing the solid content and the treated water are discharged separately. To do. Details of the ultraviolet irradiation device 1 will be described later.

  The pump 2 is for flowing the waste water discharged from the ultraviolet irradiation device 1 into the solid-liquid separation device 3, and is operated so as to flow the waste water at a predetermined frequency and a predetermined flow rate. Here, “predetermined frequency” means operation 2 to 3 times a day in the case of water to be treated with a low solid content, and water to be treated with a high solid content. Means constant operation. The “predetermined flow rate” is a flow rate smaller than the flow rate of the water to be treated, and is preferably a flow rate smaller than the flow rate of the treated water (note that the flow rate of the treated water = the flow rate of the pump 2 + the treated water). Flow rate). However, the flow rate of the pump 2 is the same as the flow rate of the water to be treated because the valve 4 is closed and the flow rate of the treated water becomes zero only when the lamp or the like is broken. The operation of the pump 2 at “predetermined frequency” and “predetermined flow rate” is the same in the following embodiments.

  The solid-liquid separation device 3 is a device that removes solids from the wastewater discharged from the ultraviolet irradiation device 1 when the wastewater flows in via the pump 2. Specifically, the solid-liquid separation device 3 is discharged from the ultraviolet irradiation device 1 by any one of a filtration mechanism, a membrane separation mechanism, a centrifugal separation mechanism, a sedimentation separation mechanism, a squeezing separation mechanism, or a combination thereof. The waste water is separated into solid and water. The separated water may be drained as it is, but it is preferable to connect it to the treated water line via the pipe 3a and return it to the treated water as return water. In other words, the water treatment system may include a pipe 3 a that flows the waste water from which the solid content has been removed by the solid-liquid separator 3 into the water to be treated before flowing into the ultraviolet irradiation device 1.

  In addition, when returning the separated water as return water, the solid-liquid separation device 3 is separated from the viewpoint of preventing the diffusion of mercury contamination when the breakage of the ultraviolet lamp 9 or the protection tube 10 is detected by the protection tube crack detector 11. It is preferable to provide a switching function for switching the destination of the separated water so that the water is drained without being returned as return water.

Next, the ultraviolet irradiation device 1 will be described in detail.
As shown in FIGS. 2 and 3, the ultraviolet irradiation device 1 irradiates the water to be treated flowing from the water line to be treated with ultraviolet rays to inactivate the algae and microorganisms contained in the water to be treated. Is a device that generates In the ultraviolet irradiation device 1, specifically, a cylindrical irradiation unit 5-1 corresponding to a body portion irradiated with ultraviolet rays, and a state in which the upper end portion of the irradiation unit 5-1 is bulged. A cylindrical inflow portion 5-2 whose upper end opening is closed with a metal material cover, and an inverted conical (funnel-shaped) separation portion 5-3 connected to the lower end of the irradiation portion 5-1. An irradiation vessel 5 comprising: a treatment water inlet pipe 6 connected to the fluid outlet of the treatment water line; and a central axis line inside the irradiation vessel 5 through the cover from the upper part of the inflow portion 5-2. A treated water outlet pipe 7 that is inserted and connected to the treated water line, and a solid matter discharge pipe 8 that is connected to the drainage line and attached to the lower end of the separation part 5-2 are provided.

  In the irradiation unit 5-1, as shown in the plan view of FIG. 3, a plurality of ultraviolet lamps 9 (9-1 to 9-6) are arranged in parallel with the container axis and at equal intervals along the circumferential direction. On the outer periphery of each ultraviolet lamp 9, a protective tube 10 for individually storing and protecting the lamp, a protective tube crack detector 11 for detecting the breakage, and an ultraviolet illuminance meter 12 on the wall of the irradiation container 5 are provided. Is provided. Note that at least one ultraviolet lamp 9 may be arranged, but a plurality of ultraviolet lamps are preferably arranged from the viewpoint of securing the irradiation amount of ultraviolet rays even when some of the ultraviolet lamps 9 are turned off due to abnormality. .

  The treated water inlet pipe 6 is attached to one side wall surface of the inflow portion 5-2, and specifically, is attached toward the tangential direction with respect to the cylindrical container cross section of the inflow portion 5-2 constituting the irradiation container 6, The to-be-processed water which flows into the upper part in the irradiation container 5 produces the state which produces | generates an initial turning. In addition, the to-be-processed water which flowed in from the to-be-processed water inlet pipe 6 descend | falls, turning in the downward direction from the upper part in a container, and flows out out of a container through the to-be-treated water outlet pipe 7. FIG.

  The treated water outlet pipe 7 is inserted into the irradiation container 5 from the upper part of the irradiation container 5 along the container central axis as described above. The lower end of the treated water outlet pipe 7 is set at the same position as the lower end of the ultraviolet lamp 9.

  The ultraviolet illuminance meter 12 may be attached at any position where ultraviolet rays emitted from the ultraviolet lamp 9 reach, but it is attached to the wall of the irradiation unit 5-1 corresponding to the vicinity of the center of the ultraviolet lamp 9 in the vertical direction. It is preferable to attach. Further, although one ultraviolet illuminance meter 12 may be provided, it is preferable to install a plurality of ultraviolet illuminance meters because it is necessary to monitor the amount of ultraviolet irradiation irradiated from all the ultraviolet lamps 9 (9-1 to 9-6).

  In addition, as shown in FIG. 3, when mainly monitoring the ultraviolet irradiation amount irradiated from the two ultraviolet lamps 9, it makes an adjacent pair with respect to, for example, the six ultraviolet lamps 9-1 to 9-6. It is desirable to attach three ultraviolet illuminance meters 12-1 to 12-3 at equal intervals to the circumferential wall surface of the irradiation unit 5-1 corresponding to the substantially central position of the two ultraviolet lamps 9. Here, the ultraviolet illuminance meter 12-1 monitors the ultraviolet irradiation amount irradiated from the paired ultraviolet lamps 9-1 and 9-2. Similarly, the ultraviolet illuminance meter 12-2 determines the irradiation amount of ultraviolet rays irradiated from the ultraviolet lamps 9-3 and 9-4 that make a pair, and the ultraviolet illuminance meter 12-3 emits light from the paired ultraviolet lamps 9-5 and 9-6. Monitor each one. Each of the ultraviolet lamps 9-1 to 9-6 is individually housed in a protective tube 10 and protected.

  The protection tube crack detector 11 may be of any detection type as long as it can detect the breakage of each protection tube 10 and outputs a breakage detection signal. When each protection tube 10 is damaged, the water to be treated enters into each protection tube 10. For example, a resistance electrode sensor that detects a potential change due to an electrode, a temperature detection sensor that detects a temperature change, and a humidity change. Detection is performed by any one of a humidity sensor for detecting, a pressure detecting sensor for detecting a pressure change, and a strain detecting sensor for detecting a strain change. When the protective tube crack detector 11 outputs a breakage detection signal to the valve 4 and the solid-liquid separator 3, the valve 4 is closed and the solid-liquid separator 3 discharges the waste water without returning the returned water. Further, not only the breakage detection signal of the protection tube crack detector 11 but also the possibility of failure of the protection tube crack detector 11 is taken into account when the UV lamp 9 is turned off due to a decrease in illuminance of the UV illuminance meter 12. Then, the valve 4 may be closed and the solid-liquid separator 3 may discharge the waste water without returning the returned water.

Next, the operation of the water treatment system configured as described above will be described.
As shown in FIG. 3, the water to be treated passes through the water line to be treated and is attached to the water inlet pipe 6 to be treated which is attached in a tangential direction with respect to the cylindrical container cross section of the inflow portion 5-2 constituting the ultraviolet irradiation device 1. It enters into the inflow part 5-2 of the irradiation container 5 from the treated water inlet pipe 6 and sequentially moves from the upper part of the container to the lower part of the container while turning in the clockwise direction around the container axis.

  More specifically, the water to be treated rotates in a spiral manner in the vicinity of the outer periphery of each protective tube 10 that individually accommodates, for example, six ultraviolet lamps 9-1 to 9-6 arranged in the circumferential direction. While descending downward.

  Here, while the water to be treated flows through the vicinity of the ultraviolet lamps 9 (9-1 to 9-6), the ultraviolet rays are irradiated from the ultraviolet lamps 9 according to the irradiation amount of the ultraviolet rays in FIG. The chromaticity changes as shown. In FIG. 4, a thick arrow and its darkness represent how the chromaticity changes with the flow of water to be treated and the amount of ultraviolet irradiation. That is, the water to be treated changes from gray to black as the amount of ultraviolet irradiation is received, and the sterilization target microorganisms contained in the water to be treated are inactivated and moved to the separation unit 5-3. In the separation unit 5-3, the solid matter contained in the water to be treated and the treated water are centrifuged, and the solid matter settles below the separation unit 5-3 and is accumulated or discharged.

  On the other hand, the treated water enters from the lower end of the treated water outlet pipe 7 and rises and is sent to another downstream water purification process (not shown) through the valve 4 of the treated water line. In addition, the illuminance from each lamp is measured by the ultraviolet illuminance meter 12, and the output of each lamp is adjusted so that the irradiation amount can inactivate the microorganisms to be disinfected from the processing amount.

  In the case of water to be treated having a low solids content, the solid matter settled at the bottom of the separation unit 5-3 accumulates at the bottom of the separation unit 5-3 during the pause of the pump 2, and every few hours of the pump 2 In this operation, the gas is discharged from the discharge pipe 8 to the drainage line at a frequency of 2 to 3 times a day. Moreover, the solid matter settled in the lower part of the separation unit 5-3 is always discharged as drainage from the discharge pipe 8 to the drainage line by continuous operation of the pump 2 in the case of water to be treated having a large solid content.

  The wastewater discharged to the drainage line and made up of a part of solid matter and treated water is sent to the solid-liquid separator 3 via the pump 2.

  In the solid-liquid separator 3, this waste water is separated into solid and water. The water from which the solid matter has been removed is returned to the treated water in the treated water line through the pipe 3a as return water. The separated solid matter is discharged out of the water treatment system as sludge.

  When the protection tube crack detector 11 detects the breakage of the corresponding ultraviolet lamp 9 or protection tube 10, the bulb 4 is throttled or closed and the pump 2 is moved at a predetermined flow rate to remove the lamp or protection tube fragments. The water is discharged from the distribution pipe 9 to the drain line.

  The discharged debris is sent to the solid-liquid separator 3 via the pump 2. In the solid-liquid separator 3, the waste water is separated into solid matter containing a large amount of debris and water. The water from which the debris has been removed is discharged as waste water, and the solid matter containing the debris is discharged out of the water treatment system as sludge.

  As described above, according to the present embodiment, the ultraviolet irradiation device 1 separates the solid content and the treated water contained in the fluid to be treated, and separately discharges the waste water and the treated water containing the solid content. The solids such as algae, lamp / protection tube fragments and mercury can be separated from the treated water, and the solid-liquid separator 3 removes the solids from the waste water discharged from the ultraviolet irradiation device 1. It is possible to prevent the solid content such as algae in the fluid to be treated from accumulating in the ultraviolet irradiation device. Specifically, the pump 2 is operated at a frequency according to the amount of solid content in the fluid to be treated, and the pump 2 causes waste water containing solid content discharged from the ultraviolet irradiation device 1 to flow into the solid-liquid separation device 3. Thus, it is possible to prevent the solid content such as algae in the fluid to be treated from being accumulated in the ultraviolet irradiation device.

  Thereby, even when solids such as algae and suspended solids are contained in the water to be treated due to a large amount of algae, rainfall, etc., these solids do not accumulate in the ultraviolet irradiation device 1. It is possible to prevent erosion of solid content in the interior and overflow to treated water due to accumulation of a large amount of solid content. In addition, by using relatively clean water such as groundwater as a water source, even when solids such as algae and suspended solids are included in the water to be treated, these solids are not accumulated in the ultraviolet irradiation device 1. The same effect can be obtained.

  Further, by using the ultraviolet irradiation device 1 having a solid-liquid separation function, the raw water is directly supplied to the ultraviolet irradiation device 1 as the water to be treated without the usual pretreatment such as filtration treatment, coagulation, and precipitation treatment. While separating and removing solids in water, it is possible to inactivate microorganisms to be disinfected in raw water. That is, it is possible to realize a space-saving water purification process that eliminates filtration ponds, coagulation, and sedimentation basins.

  Moreover, the raw water can be effectively used without waste by returning the water separated by the solid-liquid separation device 3 from the pipe 3a to the water to be treated.

(Second Embodiment)
FIG. 5 is a schematic diagram showing the configuration of a water treatment system according to the second embodiment of the present invention. The same parts as those in FIG. Mainly stated. In the following embodiments, the same description is omitted.

  In other words, the present embodiment is a modification of the first embodiment, and is intended to simplify the drainage line. Specifically, compared to the configuration shown in FIG. In place of the pump 2 of the drainage line.

Next, the operation of the water treatment system configured as described above will be described.
The treated water flows into the ultraviolet irradiation device 1 by the operation of the pump 13 of the treated water line. As in the first embodiment, the ultraviolet irradiation device 1 irradiates the water to be treated with ultraviolet rays from the ultraviolet lamp 9, and separates the solids contained in the water to be treated and the treated water into solids. Discharge waste water and treated water separately.

  Here, the waste water composed of the solid matter discharged from the ultraviolet irradiation device 1 and a part of the treated water is sent to the solid-liquid separation device 3 at a predetermined flow rate corresponding to the opening degree of the valve 14. At this time, you may adjust the flow volume discharged | emitted by a drainage line by restrict | squeezing the opening degree of the valve | bulb 4 of a treated water line. Other operations are the same as those in the first embodiment.

  As described above, according to the present embodiment, in addition to the same effects as those of the first embodiment, the drain line pump 2 can be omitted, and the drain line can be simplified.

  Supplementally, when the water to be treated is introduced into the ultraviolet irradiation device 1, the pump 13 may be necessary on the upstream side. For example, groundwater or the like is used as raw water and directly introduced into the ultraviolet irradiation device 1, or the water to be treated may be sent from the filtration basin or the coagulation sedimentation basin by the pump 13 as a pretreatment process. Utilizing the power of the pump 13, the same effect as in the first embodiment can be obtained by using only the operation of the valve 14 of the drainage line or the operation of the valve 4 of the treated water line. Can be omitted. That is, according to the present embodiment, space saving, power cost reduction, and pump introduction cost reduction can be realized as compared with the first embodiment.

(Third embodiment)
FIG. 6 is a schematic diagram showing a configuration of a water treatment system according to the third embodiment of the present invention.
This embodiment is a modification of the first embodiment, and is intended to perform continuous operation without stopping the water treatment system even when the ultraviolet lamp 9 is damaged. Specifically, the configuration shown in FIG. Compared to the above, the solid-liquid separation device 3 and the piping 3a for returning the return water to the treated water line are omitted, and the disinfectant injection device 15 for injecting the chlorine-based disinfectant into the drainage line after the pump 2, and the chlorine-based disinfectant And a solid-liquid separation device 16 for sending water obtained by solid-liquid separation of the drained water into the treated water line via the pipe 16a.

  Here, the disinfectant injection device 15 is used when the solid-liquid separator 16 can reliably separate microorganisms to be disinfected by membrane separation or the like, or when the water purification plant has a chlorine injection step after the valve 4 of the treated water line. May be omitted.

  The solid-liquid separation device 16 is configured to remove solid matter and water contained in the wastewater by any one of a filtration mechanism, a membrane separation mechanism, a centrifugal separation mechanism, a sedimentation separation mechanism, a squeezing separation mechanism, or a combination thereof. Water that has been separated and from which solids have been removed is returned to the treated water line as treated water. The separated solid matter is discharged out of the water treatment system as sludge. Further, when the membrane separation is used, the solid-liquid separation device 16 can remove mercury when the lamp is broken, and therefore, unlike the configuration described in FIG. In other words, when the membrane separation is not used, the solid-liquid separator 16 cannot remove mercury when the lamp is broken, and therefore, a function for switching to drainage is required as in the configuration described in FIG.

Next, the operation of the water treatment system configured as described above will be described.
The treated water flows into the ultraviolet irradiation device 1 through the treated water line as in the first embodiment. As described above, the ultraviolet irradiation device 1 irradiates the water to be treated with ultraviolet rays from the ultraviolet lamp 9 and separates the solids and treated water contained in the water to be treated into waste water and treated water containing the solids. Discharge separately.

  Here, the waste water consisting of the solid matter discharged from the ultraviolet irradiation device 1 and a part of the treated water is sent to the solid-liquid separation device 16 at a predetermined flow rate by the operation of the pump 2. At this time, the disinfectant injection device 15 injects the chlorine-based disinfectant into the wastewater, so that the wastewater containing the chlorine-based disinfectant is sent to the solid-liquid separation device 16. Even when the ultraviolet lamp 9 or the protective tube 10 is damaged, the waste water containing the discharged fragments is sent to the solid-liquid separator 16 after injecting a chlorine-based disinfectant from the disinfectant injector 15 and disinfecting the chlorine. .

  The solid-liquid separator 16 separates solids and water contained in the waste water, removes the solids, and returns water containing a chlorine disinfectant as treated water to the treated water line. The separated solid matter is discharged out of the water treatment system as sludge.

  As described above, according to the present embodiment, in addition to the same effects as those of the first embodiment, even when the ultraviolet lamp 9 is broken, water treatment is performed by injecting a chlorine-based disinfectant from the disinfectant injection device 15. The system can be operated continuously without stopping the system, and water can be stably supplied to the user.

  In addition, the pump 2 is always operated, and the waste water containing solids is discharged to the drain line at a predetermined flow rate that is lower than the flow rate of the treated water discharged from the treated water outlet pipe 7, and the chlorine-based disinfection from the disinfectant injection device 15. Alternatively, the agent may be injected and chlorinated, and then sent to the solid-liquid separator 16. In that case, by sending the water containing the chlorine-based disinfectant to the treated water line, the chlorine disinfection treatment becomes unnecessary after the water treatment system, so that the water treatment system can be reduced in scale.

  In addition, by sending the solid-liquid separated water to the treated water line, the entire amount of raw water can be effectively used without waste.

  Note that the disinfectant injection device 15 may be provided on the downstream side of the solid-liquid separation device 16 and the chlorine-based disinfectant may be injected into the solid-liquid separated water. However, it is possible to prevent bacteria and algae from propagating inside the solid-liquid separator 16 and disinfect solids, and to prevent sludge that is harmless to humans and animals by providing it upstream of the solid-liquid separator 16 as in this embodiment. It can be discharged outside the water treatment system. The same applies to all the embodiments in this specification.

  For example, according to a modified configuration in which a disinfectant injection device 15 for injecting a chlorine-based disinfectant is provided between the solid-liquid separation device 3 and the ultraviolet irradiation device 1 with respect to the configuration shown in FIG. 1 or FIG. Bacteria and algae in the solid-liquid separator 3 can be prevented from growing, solids can be sterilized, and harmless sludge can be discharged out of the water treatment system. The same applies to the following embodiments.

(Fourth embodiment)
FIG. 7 is a schematic diagram showing a configuration of a water treatment system according to the fourth embodiment of the present invention.
The present embodiment is a modification of the first embodiment, which simplifies the path from the drainage line to the treated water line via the pump 2, and is specifically shown in FIG. Compared to the configuration, the solid-liquid separation device 3 and the pipe 3a are omitted, the existing basin 17 and the filtration basin 18 are used for the water to be treated, and the wastewater of the ultraviolet irradiation device 1 is discharged via the valve 14, the pump 2 and the pipe 2a. Thus, it is configured to return to the landing basin 17 (or the filtration basin 18). In addition, the pump 2 is for flowing the waste_water | drain discharged | emitted from the ultraviolet irradiation device 1 into the filtration ground 18, and returns the waste_water | drain to the basin 17 upstream from the filtration basin 18 here. However, it goes without saying that the pump 2 may cause the waste water to flow directly into the filtration basin 18 via the pipe 2a.

  In addition, when the lamp is damaged, the drainage line valve 14 is closed and the drainage line valve 20 is opened to remove the debris by the solid-liquid separator 19 in order to prevent lamp fragments from entering the landing pond 17 and the filtration basin 18. To do. In other words, the valve 14 is a valve that opens during normal operation and closes when the lamp is broken. The valve 20 is a valve that is normally closed and opened when the lamp is broken.

  A three-way valve may be provided instead of the two valves 14 and 20 in the drainage line. Instead of the filtration basin 18, a coagulation sedimentation basin, a membrane treatment, or a combination thereof may be used. Further, when the lamp is broken, the bulb 4 of the treated water line is closed and the ultraviolet irradiation device 1 is stopped.

  Here, the basin 17 is a pond where the raw water flowing from the upstream side and the effluent containing solids flowing from the pipe 2a of the drainage line arrives, and the raw water mixed with the effluent is supplied to the filtration basin 18. Is.

  The filtration basin 18 is provided on the upstream side of the ultraviolet irradiation device 1 and corresponds to a solid-liquid separation device that separates and removes the solid content from the raw water supplied from the landing pond 17. It is made to flow into the ultraviolet irradiation device 1 as treated water.

  The solid-liquid separation device 19 has a filtration mechanism, a membrane separation mechanism, a centrifugal separation mechanism, a sedimentation separation mechanism, a squeezing separation mechanism, or a combination of a plurality of such mechanisms. The water from which debris and mercury have been removed is discharged as waste water. The separated debris and mercury are discharged out of the water treatment system as sludge.

Next, the operation of the water treatment system configured as described above will be described.
The raw water flows into the landing pond 17, and after the solid content is removed by the filtration pond 18, it flows into the ultraviolet irradiation device 1 as treated water. As in the first embodiment, the ultraviolet irradiation device 1 irradiates the water to be treated with ultraviolet rays from the ultraviolet lamp 9, and separates the solids contained in the water to be treated and the treated water into solids. Discharge waste water and treated water separately.

  During normal solid drainage, the valve 20 is closed, the valve 14 is opened, the flow rate is adjusted by the pump 2, the drainage is returned to the landing pond 17, and the solid content in the drainage is removed by the filter basin 18.

  When the lamp is broken, the pump 2 is stopped, the valve 14 is closed, the valve 20 is opened, and wastewater containing debris and mercury is allowed to flow into the solid-liquid separator 19 from the ultraviolet irradiation device 1. The solid-liquid separator 19 separates solids such as debris and mercury from water and water, drains the separated water, and discharges the solids as sludge.

  As described above, according to the present embodiment, in addition to the effects of the first embodiment, since the solid-liquid separation device can be omitted on the path from the drainage line to the treated water line via the pump 2, The route can be simplified.

  In the present embodiment, as shown in FIG. 8, the disinfectant injection device 15 may be provided in the drain line downstream of the valves 14 and 20. When the disinfectant injection device 15 is provided in the drain line downstream of the valve 14, the chlorine-sterilized waste water can be returned to the line to be treated, so that the water to be treated can be made relatively clean. In addition, when the disinfectant injection device 15 is provided in the drainage line downstream from the valve 20, it is possible to prevent the growth of bacteria and algae inside the solid-liquid separation device 19, and to disinfect the solid content, and to prevent sludge that is harmless to humans and animals. It can be discharged outside the water treatment system.

(Fifth embodiment)
FIG. 9 is a schematic diagram showing a configuration of a water treatment system according to the fifth embodiment of the present invention.
This embodiment is a modification of the third embodiment, and is intended for continuous operation without stopping the water treatment system even when the ultraviolet lamp is damaged. Specifically, the configuration shown in FIG. In comparison, a plurality of ultraviolet irradiation devices 1 are provided, the ultraviolet irradiation devices 1-1 and 1-2 are connected in parallel to each other, and downstream of the junctions of the drainage lines of the ultraviolet irradiation devices 1-1 and 1-2. The pump 2, the disinfectant injection device 15, and the solid-liquid separation device 16 are provided on the side. In addition, the number of pumps 2, disinfectant injectors 15 and solid-liquid separators 16 is provided on the downstream side of the merging portion of each drainage line, so that the number of ultraviolet irradiation devices 1-1 and 1-2. The number is also small.

  Further, valves 4-1 and 4-2 for adjusting the treatment flow rates are provided between the treated water lines of the plurality of ultraviolet irradiation devices 1-1 and 1-2 and the merging portions of the treated water lines, respectively. It has been. Valves 20-1 and 20-2 for adjusting the drainage flow rate are provided between the drainage lines of the plurality of ultraviolet irradiation devices 1-1 and 1-2 and the junctions of the drainage lines.

Next, the operation of the water treatment system configured as described above will be described.
This water treatment system normally operates in the same manner as in the third embodiment. On the other hand, when the lamp is broken, for example, the damaged ultraviolet irradiation device 1-1 is stopped and the processing flow rate of the non-damaged ultraviolet irradiation device 1-2 is increased. The details will be described below.

  The water to be treated flows into the ultraviolet irradiation devices 1-1 and 1-2 through the water to be treated line. As described above, each of the ultraviolet irradiation devices 1-1 and 1-2 irradiates the water to be treated with ultraviolet rays from the ultraviolet lamp 9, and separates the solids contained in the water to be treated and the treated water. Wastewater containing water and treated water are discharged separately. However, when the lamp is damaged, the damaged ultraviolet irradiation device 1-1 is stopped, and the opening degree of the valve 4-2 is adjusted so as to increase the processing flow rate of the ultraviolet irradiation device 1-2 that is not damaged. The stopped ultraviolet irradiation device 1-1 is promptly replaced.

  In any case, the solid waste discharged from the ultraviolet irradiation devices 1-1 and 1-2 and a part of the treated water are sent to the solid-liquid separation device 16 at a predetermined flow rate by the operation of the pump 2. It is done. At this time, the disinfectant injection device 15 injects the chlorine-based disinfectant into the waste water. Even when the ultraviolet lamp 9 or the protective tube 10 is damaged, the waste water containing the discharged fragments is sent to the solid-liquid separator 16 after injecting a chlorine-based disinfectant from the disinfectant injector 15 and disinfecting the chlorine. .

  The solid-liquid separator 16 separates solids and water contained in the waste water, removes the solids, and returns water containing the chlorine disinfectant from the pipe 16a to the treated water line as treated water. The separated solid matter is discharged out of the water treatment system as sludge.

  As described above, according to the present embodiment, in addition to the effects of the third embodiment, the ultraviolet rays that are damaged even when the ultraviolet lamp is damaged by the configuration in which the plurality of ultraviolet irradiation devices 1-1 and 1-2 are provided in parallel. Although the irradiation apparatus 1-1 is stopped, it is not necessary to stop the water treatment system. Therefore, the water treatment system can be continuously operated and the stability of the water treatment system can be improved.

  Moreover, wastewater treatment is not always performed. Further, when the waste water treatment is always performed as in the third embodiment, the waste water flow rate of each of the ultraviolet irradiation devices 1-1 and 1-2 is small. Therefore, the number of pumps 2, the disinfectant injection device 15, and the solid-liquid separation device 16 equivalent to the number of the ultraviolet irradiation devices 1-1 and 1-2 are not necessary. As a result, the initial cost, running cost, and installation area can be reduced as compared with the case where the pump 2, the disinfectant injection device 15 and the solid-liquid separation device 16 are provided for each of the ultraviolet irradiation devices 1-1 and 1-2. .

  Note that the present embodiment may be modified as shown in any of FIGS.

  In the modified example shown in FIG. 10, the solid-liquid separator 3 shown in the first embodiment is provided on the downstream side of the pump 2 in place of the solid separator 16 and the chlorine injector 15 shown in FIG. The water from which the solid matter is removed is returned from the pipe 2a to the water line to be treated. That is, this is a modification in which the present embodiment is applied to the first embodiment. According to the modification shown in FIG. 10, the effect of this embodiment and the effect of 1st Embodiment can be acquired simultaneously.

  In the modification shown in FIG. 11, the ultraviolet irradiation process is repeatedly performed by the configuration in which the plurality of ultraviolet irradiation apparatuses 1-1 and 1-2 shown in FIG. 9 are connected in series. According to the modification shown in FIG. 11, in addition to the effects of the third embodiment, the reliability of the ultraviolet irradiation process can be improved.

  In the modification shown in FIG. 12, the solid-liquid separation device 3 shown in the first embodiment is provided on the downstream side of the pump 2 in place of the solid separation device 16 and the chlorine injection device 15 shown in FIG. The water from which the solid matter is removed is returned from the pipe 2a to the water line to be treated. That is, this is a modification in which the modification shown in FIG. 11 is applied to the first embodiment. According to the modification shown in FIG. 12, the effects of the modification of FIG. 12 and the effects of the first embodiment can be obtained simultaneously.

  In the modification shown in FIG. 13, the solid separation device 16 and the chlorine injection device 15 shown in FIG. 9 are omitted, and the basin 17 and the filtration basin 18 shown in the fourth embodiment are replaced with the ultraviolet irradiation devices 1-1 and 1, respectively. With the configuration provided on the upstream side of -2, the waste water containing solid matter is returned from the pipe 2a to the treated water line by the operation of the pump 2. That is, this is a modification in which the present embodiment is applied to the fourth embodiment. According to the modification shown in FIG. 13, the effects of the present embodiment and the effects of the fourth embodiment can be obtained simultaneously.

  The modification shown in FIG. 14 is one in which a chlorine-based disinfectant is injected into waste water containing solid matter by the configuration in which the chlorine injection device 15 is provided in the pipe 2a of the modification shown in FIG. According to the modification shown in FIG. 14, in addition to the effects of the modification of FIG. 13, the chlorinated waste water can be returned to the treated line, so that the treated water can be made relatively clean.

  In the modification shown in FIG. 15, the ultraviolet irradiation process is repeatedly performed by the configuration in which the plurality of ultraviolet irradiation apparatuses 1-1 and 1-2 shown in FIG. 13 are connected in series. According to the modification shown in FIG. 15, in addition to the effects of the modification of FIG. 13, the reliability of the ultraviolet irradiation process can be improved.

  In the modification shown in FIG. 16, the ultraviolet irradiation process is repeatedly performed by the configuration in which the plurality of ultraviolet irradiation apparatuses 1-1 and 1-2 shown in FIG. 14 are connected in series. According to the modification shown in FIG. 16, in addition to the effects of the modification of FIG. 14, the reliability of the ultraviolet irradiation process can be improved.

(Sixth embodiment)
FIG. 17 is a schematic diagram showing a configuration of a water treatment system according to the sixth embodiment of the present invention.
The present embodiment is a modification of the first embodiment and is intended to remove solids that cannot be separated by the ultraviolet irradiation device. Specifically, the ultraviolet irradiation device 1 is compared with the configuration shown in FIG. A solid-liquid separator 21 is provided in the downstream processing water line.

  Here, the solid-liquid separation device 21 is a solid-liquid separator of the ultraviolet irradiation device 1 by any one of a filtration mechanism, a membrane separation mechanism, a centrifugal separation mechanism, a sedimentation separation mechanism, a squeezing separation mechanism, or a combination thereof. The solid content is removed from the treated water that cannot be separated by the separation function, and the separated treated water is sent to the subsequent water purification process. As the solid-liquid separation device 21, membrane separation is particularly preferable.

Next, the operation of the water treatment system configured as described above will be described.
Now, the water treatment system upstream of the solid-liquid separator 21 of the treated water line operates in the same manner as in the first embodiment. And the solid-liquid separation apparatus 21 of a treated water line removes the solid content which remains in the treated water discharged | emitted from the ultraviolet irradiation device 1, and sends the treated water from which the residual solid content was removed to a subsequent water purification process.

  As described above, according to the present embodiment, in addition to the effects of the first embodiment, the solid content in the treated water that could not be separated by the solid-liquid separation function of the ultraviolet irradiation device 1 can be removed. If it supplements, since the ultraviolet irradiation device 1 isolate | separates the solid substance in to-be-processed water with a centrifugal force, it is difficult to remove reliably the solid substance with small specific gravity or size. If the glass piece is a glass piece having a size of several tens μm to several mm or more, it can be reliably separated and removed by the ultraviolet irradiation device 1, but a glass piece having a size smaller than that is difficult to reliably separate and remove. In addition, it is difficult to remove an organic substance that has substantially the same specific gravity as water.

  However, in this embodiment, the solid-liquid separation device 21 is provided on the downstream side, so that solids in the water to be treated that cannot be removed by the ultraviolet irradiation device 1 can be reliably removed. In addition, when the solid-liquid separation device 21 is membrane separation, the ultraviolet irradiation device 1 is omitted, and the solid matter and microorganisms in the water to be treated can be reliably removed even with this membrane separation-only water treatment system. However, by providing the ultraviolet irradiation device 1 with a solid-liquid separation function added before the membrane separation, the clogging and backwashing frequency in the membrane separation can be reduced, the membrane life is prolonged, and the membrane replacement cost is reduced. This is more preferable.

  In this embodiment, as shown in FIG. 18, a chlorine injection device 15 is provided between the ultraviolet irradiation device 1 and the solid-liquid separation device 21 so that a chlorine-based disinfectant can be injected into the treated water. Also good. According to the modification shown in FIG. 18, in addition to the effects of the present embodiment, the chlorine disinfection process at the latter stage of the water treatment system becomes unnecessary, and thus the water treatment system can be reduced in scale. Moreover, the effect similar to the deformation | transformation structure of 3rd Embodiment can be acquired by the structure which provided the chlorine injection apparatus 15 between the ultraviolet irradiation device 1 and the solid-liquid separation apparatus 3. FIG.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. For example, the ultraviolet irradiation device 1 is not limited to the solid-liquid separation by centrifugation, and may be configured to perform solid-liquid separation by the filter basin, for example, in an ultraviolet irradiation device in which an ultraviolet lamp is placed in the filter pond.

  Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

It is a mimetic diagram showing the composition of the water treatment system concerning a 1st embodiment of the present invention. It is a schematic diagram which shows the structure of the ultraviolet irradiation device in the embodiment. It is a top view which shows the arrangement | positioning relationship between the ultraviolet lamp and ultraviolet illuminance meter in the embodiment. It is a schematic diagram for demonstrating a mode that the to-be-processed water in the same embodiment was swirled within the irradiation container. It is a schematic diagram which shows the structure of the water treatment system which concerns on the 2nd Embodiment of this invention. It is a schematic diagram which shows the structure of the water treatment system which concerns on the 3rd Embodiment of this invention. It is a schematic diagram which shows the structure of the water treatment system which concerns on the 4th Embodiment of this invention. It is a schematic diagram which shows the modification of the water treatment system in the embodiment. It is a schematic diagram which shows the structure of the water treatment system which concerns on the 5th Embodiment of this invention. It is a schematic diagram which shows the modification of the water treatment system in the embodiment. It is a schematic diagram which shows the modification of the water treatment system in the embodiment. It is a schematic diagram which shows the modification of the water treatment system in the embodiment. It is a schematic diagram which shows the modification of the water treatment system in the embodiment. It is a schematic diagram which shows the modification of the water treatment system in the embodiment. It is a schematic diagram which shows the modification of the water treatment system in the embodiment. It is a schematic diagram which shows the modification of the water treatment system in the embodiment. It is a schematic diagram which shows the structure of the water treatment system which concerns on the 6th Embodiment of this invention. It is a schematic diagram which shows the modification of the water treatment system in the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 (1-1, 1-2) ... Ultraviolet irradiation apparatus, 2,13 ... Pump, 3, 16, 19, 21 ... Solid-liquid separation apparatus, 4 (4-1 to 4-2), 14, 20 (20 -1 to 20-2) ... valve, 5 ... irradiation container, 5-1 ... irradiation part, 5-2 ... inflow part, 5-2 ... separation part, 6 ... treated water inlet pipe, 7 ... treated water outlet pipe , 8 ... Solid matter discharge pipe, 9 (9-1 to 9-6) ... UV lamp, 10 ... Protection pipe, 11 ... Protection pipe crack detector, 12 (12-1 to 12-3) ... Illuminance meter, 15 ... disinfectant injection device, 17 ... landing pond, 18 ... filtration pond.

Claims (10)

In a water treatment system that irradiates the fluid to be treated with ultraviolet rays for water purification treatment,
One or a plurality of ultraviolet lamps individually housed in a protective tube are arranged in the container into which the fluid to be treated flows, and the ultraviolet rays are irradiated from the ultraviolet lamp to the fluid to be treated flowing in the container. And an ultraviolet irradiation device that separates solids and treated water contained in the fluid to be treated, and separately discharges the waste water containing the solids and treated water,
A water treatment system comprising: a solid-liquid separation device that removes solid content from the wastewater discharged from the ultraviolet irradiation device. The water treatment system according to claim 1,
A water treatment system, further comprising a pipe through which the waste water from which the solid content has been removed by the solid-liquid separation device flows into the fluid to be treated before flowing into the ultraviolet irradiation device. The water treatment system according to claim 1,
A water treatment system, further comprising a pipe through which the waste water from which the solid content has been removed by the solid-liquid separation device flows into the treated water discharged from the ultraviolet irradiation device. The water treatment system according to claim 1,
A water treatment system, further comprising a downstream solid-liquid separation device that is provided on the downstream side of the ultraviolet irradiation device and removes solids remaining in the treated water discharged from the ultraviolet irradiation device. In a water treatment system that irradiates the fluid to be treated with ultraviolet rays for water purification treatment,
One or a plurality of ultraviolet lamps individually housed in a protective tube are arranged in the container into which the fluid to be treated flows, and the ultraviolet rays are irradiated from the ultraviolet lamp to the fluid to be treated flowing in the container. And an ultraviolet irradiation device that separates solids and treated water contained in the fluid to be treated, and separately discharges the waste water containing the solids and treated water,
A water treatment system comprising: a solid-liquid separation device for pretreatment that is provided on the upstream side of the ultraviolet irradiation device and separates and removes solids in the fluid to be treated in advance. In the water treatment system according to any one of claims 1 to 5,
The said solid-liquid separation apparatus is a water treatment system characterized by carrying out solid-liquid separation by one or more means among a filtration means, a membrane separation means, a centrifugation means, a sedimentation separation means, and a pressing separation means. In the water treatment system according to any one of claims 1 to 6,
A plurality of the ultraviolet irradiation devices are provided, the plurality of ultraviolet irradiation devices are connected in parallel or in series with each other, and the number of the solid-liquid separation devices is less than the number of the ultraviolet irradiation devices. Processing system. In the water treatment system according to any one of claims 1 to 7,
A water treatment system further comprising a disinfectant injection device for injecting a chlorine-based disinfectant into waste water or treated water discharged from the ultraviolet irradiation device and flowing into the solid-liquid separation device. In the water treatment system according to any one of claims 1 to 8,
The ultraviolet ray irradiation device separates the fluid to be treated flowing in the container into a solid content and treated water contained in the fluid to be treated by performing centrifugation. The water treatment system according to claim 9,
In the ultraviolet irradiation device, one or a plurality of ultraviolet lamps, which are parallel to the axis of the container and individually housed in a protective tube, are arranged inside a cylindrical container, and swivel from the top to the bottom in the container. A water treatment system characterized by irradiating ultraviolet rays from the ultraviolet lamp onto the fluid to be treated while descending.

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