JP4810261B2 - Water treatment system - Google Patents

Description

  The present invention relates to a water treatment system that performs water purification using ultraviolet irradiation.

  Conventionally, water treatment systems represented by water supply have been operated on the basis of chlorination treatment from the viewpoint of hygienic safety. However, in recent years, water pollution accidents have occurred due to emerging or reviving pathogenic microorganisms such as Cryptosporidium and Giardia.

  In addition, large amounts of algae are generated in lakes, dams, and rivers, which are the sources of tap water, due to eutrophication and the progress of organic pollution, and accompanying this, off-flavors, coloring disturbances, aggregation, precipitation inhibition, filtration Obstacles such as clogging and leakage of filtered water have occurred.

  Further, there is a problem that a chlorine agent injected for sterilization reacts with organic substances in raw water to generate harmful by-products (such as trihalomethane).

  However, with respect to many problems as described above, a water treatment system having only a basic purification treatment process including conventional agglomeration, precipitation, filtration, and chlorination is in a situation where it cannot be sufficiently dealt with.

  In view of this situation, attention has been paid to a sterilization technique using ultraviolet irradiation (hereinafter sometimes referred to as ultraviolet disinfection) as an alternative sterilization technique for chlorination. Ultraviolet disinfection technology does not require complicated chemical injection management and has the advantage that no harmful by-products are generated.

  For this reason, in a water purification plant etc., an ultraviolet irradiation process may be employ | adopted for the purpose of the oxidation of bacteria and a residual organic substance. However, in consideration of the transmission efficiency of ultraviolet rays, the treatment of irradiating ultraviolet rays to the filtered water or the agglomerated / precipitated water is usually performed.

  On the other hand, in the case of aiming at improvement of aggregation or loss of infectivity of pathogenic protozoa such as Cryptosporidium, treatment of irradiating the raw water with ultraviolet rays is performed. This is a process of irradiating ultraviolet rays instead of chlorination.

  As described above, ultraviolet rays, unlike chlorine, do not produce by-products such as trihalomethane, and have a characteristic that they are highly effective in damaging the growth ability of cryptosporidium and eliminating infectivity. Therefore, the ultraviolet irradiation treatment can be utilized by making effective use of the merits of the ultraviolet rays.

  Furthermore, in the water purification treatment, it is important not to propagate the algae contained in the raw water, but in the case of the ultraviolet irradiation treatment, the effect of effectively preventing the growth of algae has been confirmed.

  Thus, in recent years, several techniques for performing water purification using ultraviolet irradiation have been proposed.

  Since the water purification technology using ultraviolet irradiation is aimed at disinfecting pathogenic microorganisms and protozoa, a lamp that emits ultraviolet rays in the 200 nm to 300 nm wavelength region called UV-C band, which is effective for disinfection, that is, a low pressure sealed with mercury vapor. A medium-pressure mercury lamp is used.

  In addition, as an ultraviolet irradiation device for irradiating the fluid to be treated with ultraviolet rays, a cylindrical container having a function of circulating the fluid to be treated and one or a plurality of ultraviolet lamps arranged in parallel to the container axis in the cylindrical container The thing of the structure which was made is known (for example, refer nonpatent literature 1).

  However, in order to inactivate pathogenic protozoa, pathogens, bacteria, viruses, etc. that are subject to disinfection, the amount of UV irradiation required for each microbial species differs, and the fluid to be treated enters the UV irradiation device. It is necessary to be irradiated with ultraviolet rays evenly within a short time before leaving. On the other hand, the irradiation efficiency of ultraviolet rays varies depending on the turbidity and chromaticity of the fluid to be treated. In the case of ultraviolet irradiation treatment, it is particularly difficult to control the quality of raw water, so that there is a problem that it is difficult to maintain appropriate ultraviolet irradiation efficiency. That is, the ultraviolet intensity (illuminance) decreases in inverse proportion to the square of the distance from the ultraviolet lamp. As a result, in order for ultraviolet irradiation to act effectively, it is necessary for the fluid to be processed to pass through the vicinity of the ultraviolet lamp.

  As a technical means for solving this point, there is a device in which the arrangement of the treated fluid inlet pipe and the outlet pipe of the container is devised so that the treated fluid swirls in the container and flows through the vicinity of the ultraviolet lamp. Yes (for example, see Patent Document 1 or Patent Document 2).

  As another ultraviolet irradiation technology, the raw water is appropriately irradiated with ultraviolet rays by detecting the turbidity of the raw water and controlling the flow rate of the raw water flowing into the water pipe containing the ultraviolet lamp according to the detected turbidity. There has been proposed a technique that can be received (see, for example, Patent Document 3). In this document, it is proposed to use ultraviolet irradiation at the time of disappearance treatment of underwater plankton, such as a reservoir.

  In addition, a technique has been proposed in which a particle meter is installed in place of the turbidimeter, and the amount of ultraviolet irradiation is controlled using the output of this particle meter (Non-patent Document 2). Furthermore, an ultraviolet irradiation system has been proposed in which a turbidimeter and a particle meter are used in combination, and an ultraviolet irradiation amount of an ultraviolet lamp is controlled using an output obtained from these instruments (see, for example, Patent Document 4).

  In some cases, a protective tube containing the ultraviolet lamp is provided for the purpose of protecting the ultraviolet lamp disposed in the container. As a material for the protective tube, crystal quartz or synthetic quartz glass is used because it is necessary to efficiently transmit ultraviolet rays. As a result, if an excessive force or sudden impact is applied to the protective tube or the ultraviolet lamp, there is a risk that it will be easily damaged. In particular, when the ultraviolet lamp is broken, there is a problem that mercury enclosed in the lamp enters the processing fluid and quartz glass fragments constituting a protective tube or the like are mixed into the processing fluid.

Conventionally, as means for solving such an inconvenient problem, a sensor for detecting breakage of the ultraviolet lamp and a bypass pipe for bypassing instead of the ultraviolet irradiation device are provided, and ultraviolet irradiation of the fluid to be treated is performed when the lamp is broken by the sensor. An ultraviolet irradiation system has been proposed in which the treatment water contaminated with mercury is prevented from flowing into other water purification processes by shutting off the inflow to the apparatus and the discharge of the treated water flow and flowing it to the bypass pipe by opening the valve ( For example, see Patent Document 5).
Japanese Patent Application No. 2005-31820 Japanese Patent Application No. 2005-347069 JP 05-169059 A JP 2004-188273 A 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 Fine Particle Measuring Instruments”, Journal of Water Supply Association, Vol. 71, No. 10, pp. 31-51, published in October 2002

  However, the following problems have been pointed out in the ultraviolet irradiation apparatus and the ultraviolet irradiation treatment method described in the above-mentioned patent documents.

  In general, the quality of raw water changes greatly due to fluctuations in the water source and weather. That is, the concentration of raw water, the number of fine particles, and the concentration of organic substances are greatly changed due to a large amount of algae, rainfall, and the like, and the increase in these numerical values decreases the ultraviolet transmittance. When the transmittance of ultraviolet rays decreases, the effect of ultraviolet irradiation decreases, and accordingly, the effect of sterilizing (disinfecting) pathogenic bacteria and the like decreases. Therefore, in order to prevent a decrease in sterilization treatment, it is conceivable to adjust the ultraviolet irradiation amount based on the measurement results such as the turbidity of raw water and the number of fine particles.

  However, it is difficult to adjust the amount of ultraviolet irradiation output from the ultraviolet lamp, and in some cases, there is a possibility that the ultraviolet rays to be sterilized or the irradiation efficiency may be lowered. In particular, an ultraviolet irradiation device for small scales has only a small initial cost for an output adjustment system for ultraviolet rays, and the effect of reducing power consumption is small. As a result, it is often operated with the maximum output capable of sufficiently disinfecting the pathogenic microorganism without providing an output adjustment function.

  In addition, if the UV transmittance is greatly reduced and sufficient disinfection performance cannot be obtained even when operating at the maximum output, or if the protective tube is broken, the water treatment system must be stopped and water supply cannot be performed. There is a problem that a state occurs and the abnormal state cannot be accurately grasped.

  Furthermore, when the light is turned off due to an abnormality of a part of the ultraviolet lamp, there is a problem that the fluid flowing in the vicinity of the turned off lamp is not sufficiently irradiated with the ultraviolet light and flows out to the downstream water purification process as it is.

  The present invention has been made in view of the circumstances described above. Uniform ultraviolet irradiation improves algal countermeasures and disinfection performance of pathogenic bacteria, eliminates the generation of by-products, and changes in the processing amount of the fluid to be processed and part of it. The purpose of this is to provide a water treatment system that can reduce the influence of a malfunctioning lamp, and also ensure disinfection performance even when the ultraviolet lamp or protective tube breaks, and continue water supply.

(1) In order to solve the above-described problem, in the water treatment system according to the present invention, one or a plurality of ultraviolet lamps individually stored in a protective tube are arranged in a container into which a fluid to be treated flows. Connected to at least two ultraviolet irradiation devices provided in parallel for irradiating ultraviolet rays from the ultraviolet lamp to the fluid to be processed flowing in the container, and a plurality of branch lines branched from the input line of the fluid to be processed. Among the upstream line and downstream line of each of the ultraviolet irradiation devices, a flow rate adjusting valve or pump installed at least upstream, and illuminance measuring means for measuring ultraviolet illuminance inside the container,
Ultraviolet irradiation amount determining means for determining the ultraviolet irradiation amount based on a predetermined flow rate of the fluid to be processed flowing into the container and the illuminance measured by the illuminance measuring means, and the determined ultraviolet irradiation amount is the contamination of the protective tube When the output of the ultraviolet lamp is lower than the threshold sufficient for inactivation of the microorganisms to be sterilized, the opening of the valve belonging to the corresponding ultraviolet irradiation device is lowered, or the discharge amount of the pump is lowered to It is the structure provided with the water purification process monitoring control apparatus which has the valve adjustment means which reduces the processing amount of a to-be-processed fluid, and flows into the said applicable ultraviolet irradiation device .
Further, the water treatment system according to the present invention is measured by a predetermined flow rate of the fluid to be treated flowing into the container and the illuminance measuring means in addition to the constituent elements of the ultraviolet irradiation device, the flow rate adjusting valve or pump, and the illuminance measuring means. UV irradiation amount determining means for determining the ultraviolet irradiation amount based on the illuminance, and the determined ultraviolet irradiation amount inactivates the microorganisms to be disinfected due to the contamination of the protective tube and the cause of a decrease in the output of the ultraviolet lamp. When the value is below a sufficient threshold value, the valve or pump belonging to the corresponding ultraviolet irradiation device is closed, and the opening of the valve belonging to the other ultraviolet irradiation device or the discharge amount of the pump is increased to increase the processing amount of the fluid to be processed. It is the structure provided with the water purification process monitoring control apparatus which has the valve adjustment means which makes it let it flow into the other ultraviolet irradiation device.

(2) Further, in the water treatment system according to the present invention, one or a plurality of ultraviolet lamps individually housed in a protective tube are arranged in a container into which a fluid to be treated flows, and the water treatment system that flows through the container. At least two ultraviolet irradiation devices provided in parallel to irradiate the treatment fluid with ultraviolet rays from the ultraviolet lamp, and each ultraviolet irradiation device connected to a plurality of branch lines branched from the input line of the water to be treated Of the upstream line and the downstream line, a flow rate adjusting valve or pump installed at least on the upstream side, and illuminance measuring means for measuring the ultraviolet illuminance inside the container,
Ultraviolet irradiation amount determining means for determining the ultraviolet irradiation amount based on a predetermined flow rate of the fluid to be processed flowing into the container and the illuminance measured by the illuminance measuring means, and the determined ultraviolet irradiation amount is the contamination of the protective tube And a lamp output decrease determination means for determining that the output dose of the UV lamp is decreased when the threshold is below a threshold sufficient for inactivating the microorganisms to be disinfected due to the output decrease of the UV lamp, and a decrease in the output dose A lamp output adjusting means for adjusting the output dose of the ultraviolet lamp so that the UV dose reaches the dose threshold, and regardless of the adjustment of the output dose of the UV lamp. When the ultraviolet irradiation amount does not reach the irradiation threshold value, the opening amount of the valve or the discharge amount of the pump belonging to the corresponding ultraviolet irradiation device is lowered to reduce the treatment amount of the water to be treated. A configuration in which a water treatment monitoring control system and a valve adjusting means for flowing the ultraviolet irradiation apparatus Gensa was the appropriate with.

(3) In the water treatment system according to the present invention, one or a plurality of ultraviolet lamps individually stored in a protective tube are arranged in a container into which the fluid to be treated flows, and the fluid to be treated that flows in the container In contrast, at least two of the ultraviolet lamps that irradiate ultraviolet rays from the ultraviolet lamp are provided in parallel, and upstream of the ultraviolet irradiation devices connected to a plurality of branch lines branched from the input line of the water to be treated. Of the side line and the downstream line, at least the flow rate adjusting valve or pump installed on the upstream side, illuminance measuring means for measuring the ultraviolet illuminance inside the container,
Ultraviolet irradiation amount determining means for determining the ultraviolet irradiation amount based on a predetermined flow rate of the fluid to be processed flowing into the container and the illuminance measured by the illuminance measuring means, and the determined ultraviolet irradiation amount is the contamination of the protective tube And a lamp output decrease determination means for determining that the output dose of the UV lamp is decreased when the threshold is below a threshold sufficient for inactivating the microorganisms to be disinfected due to the output decrease of the UV lamp, and a decrease in the output dose A lamp output adjusting means for adjusting the output dose of the ultraviolet lamp so that the UV dose reaches the dose threshold, and regardless of the adjustment of the output dose of the UV lamp. When the ultraviolet ray irradiation amount does not reach the dose threshold value, the valve or pump belonging to the relevant ultraviolet ray irradiation device is closed, and the opening degree of the valve belonging to the other ultraviolet ray irradiation device Is a structure that includes a water purification process monitoring control system and a valve adjusting means for flowing said to increase the discharge amount of the pump by increasing the processing amount of the water to be treated to the other ultraviolet irradiation device.

(4) Moreover, the water treatment system which concerns on this invention WHEREIN: In the structure in any one of said (1) thru | or (3), when the said ultraviolet irradiation device is provided in parallel 3 units | sets, the said protection tube crack is carried out. Protective tube breakage detecting means is provided, and when the water purification treatment monitoring and control device determines that the protective tube cracking is detected from the output of the protective tube breakage detecting unit belonging to the one ultraviolet irradiation device, the valve belonging to the ultraviolet irradiation device. Or a valve adjusting means that closes the pump, increases the opening of a valve belonging to another ultraviolet irradiation device or the discharge amount of the pump to increase the processing amount of the fluid to be processed, and flows into the other ultraviolet irradiation device It is.
Furthermore, the water treatment system according to the present invention is provided with a flow rate measuring means for measuring the flow rate of the fluid to be treated in the input branch line of each ultraviolet irradiation device in any one of the constitutions (1) to (3), When the total flow rate of the fluid to be treated is small, the process monitoring and control device increases the opening amount of the valve belonging to one ultraviolet irradiation device or the discharge amount of the pump and raises the output of the ultraviolet lamp and increases the throughput of the fluid to be treated. And a means for adjusting so as to decrease the opening of the valve or the discharge amount of the pump belonging to another ultraviolet irradiation device and decrease the output of the ultraviolet lamp.

  In addition, in the configuration of any one of (1) to (3), a flow rate measuring unit that measures the flow rate of the fluid to be processed flowing into each of the ultraviolet irradiation devices, and a flow rate measured by the flow rate measuring unit, It may be configured to include a water purification treatment monitoring and control device having an ultraviolet ray irradiation amount calculating means instead of the ultraviolet ray irradiation amount determining means for calculating the ultraviolet ray irradiation amount based on the illuminance measured by the illuminance measuring means. .

  According to the present invention, it is possible to improve the disinfection performance of algae countermeasures and pathogenic bacteria by uniform ultraviolet irradiation, the generation of by-products is eliminated, the fluctuation of the processing amount of the fluid to be processed, and some lamps break down In addition, the water treatment system can be provided which can reduce the influence of the failure and ensure the disinfection performance even when the ultraviolet lamp or the protective tube is broken, and can continue the water supply.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a configuration diagram showing an embodiment of a water treatment system according to the present invention.

  The water treatment system is composed of first and second water treatment systems. The first water treatment system is installed on the treated water branch line 1a, and an ultraviolet irradiation device 2a for irradiating the treated water flowing from the treated water input line 1 through the treated water branch line 1a with ultraviolet rays. Inlet flow rate adjusting valve 3a, to-be-treated water flow meter 4a, outlet valve 6a installed in treated water branch line 5a connected to the output side of ultraviolet irradiation device 2a, ultraviolet illuminance meter 7a, protective tube crack detector 8a and the lamp output adjustment power supply unit 9a, and the second water treatment system has the same configuration.

  That is, the water treatment system has the same components 2b to 9b as those of the first water treatment system including the components 2a to 9a as described above between the treated water input line 1 and the treated water confluence output line 5. The 2nd water treatment system provided with is connected in parallel. In addition, although this Embodiment has illustrated about two water treatment systems, it is also possible to increase the maximum processing amount of a water treatment system by connecting three or more water treatment systems in parallel. . Reference numeral 10 denotes a water purification treatment monitoring and control device that performs overall control of a plurality of water treatment systems.

  In addition, it may replace with the inlet flow rate adjustment valve 3a mentioned above, and a structure which installs a pump and adjusts the to-be-processed water amount which flows in into the ultraviolet irradiation device 2a may be sufficient.

  Further, the water treatment system includes a chlorine-based disinfecting water purification area 11 installed in the treated water confluence output line 5 and a chlorine-based disinfecting water purifying area 11 based on an injection instruction signal from the water purification treatment monitoring and control device 10. A chlorine-based disinfectant injection device 12 for injecting a disinfectant and a disinfectant injection tube 13 for connecting the chlorine-based disinfectant injection device 12 and the chlorine-based disinfection water purification area 11 are provided. The chlorine-based disinfecting water purification area 11 is installed not on the treated water confluence output line 5 but on the upstream side or downstream side of the outlet valves 6a, 6b in the treated water branch lines 5a, 5b, and injects a chlorine-based disinfectant. It may be a configuration.

  Hereinafter, for convenience of explanation, the components 2a to 9a of the first water treatment system will be described, and the second water treatment system having the similar components 2b to 9b has the same function or action. Description is omitted.

  The ultraviolet irradiation device 2a is a device having a mechanism for generating purified treated water by irradiating the treated water flowing from the branch line 1a of the treated water input line 1 with ultraviolet rays. Specifically, A cylindrical irradiation part 20a-1 corresponding to a body part serving as a region for irradiating ultraviolet rays, and a bulge connected to the upper end part of the irradiation part 20a-1, the upper end opening being made of metal An irradiation container 20a composed of a cylindrical inflow portion 20a-2 closed with a material cover and an inverted conical separation portion 20a-3 connected to the lower end of the irradiation portion 20a-1, and a water branch line 1a to be treated The to-be-processed water inlet pipe 21a connected between the fluid outlet side and the inflow part 20a-2 and the upper part of the inflow part 20a-2 penetrates the cover and is inserted into the central axis line inside the irradiation container 20a. Treated water outlet pipe 22a And attached to the lower end portion of the separating portion 20a-2 contaminant trap container 23a, a contaminant recovery pipe 24a attached to the trap container 23a is provided.

  As the irradiation unit 20a-1, a plurality of ultraviolet lamps 25a (25a-1 to 25a-6) are arranged in parallel with the container axis and at equal intervals in the circumferential direction, as shown in FIG. A protective tube 26a for housing and protecting the ultraviolet lamp 25a is provided on the outer periphery of the ultraviolet lamp 25a.

  The treated water inlet pipe 21a is attached to one side wall surface of the inflow portion 20a-2, and more specifically, is attached toward the tangential direction with respect to the cylindrical container cross section of the inflow portion 20a-2 constituting the irradiation container 20a. The to-be-processed water which flows into the upper part in the irradiation container 20a has a role which produces | generates initial turning.

  As described above, the treated water outlet pipe 22a is inserted into the irradiation container 20a from the upper part of the irradiation container 20a along the container central axis, and its lower end is equal to or slightly more than the lower end of the ultraviolet lamp 25a. Set to the upper position.

  The ultraviolet illuminance meter 7a may be attached at any position where ultraviolet rays irradiated from the ultraviolet lamp 2a reach, but it is attached to the wall of the irradiation unit 20a-1 corresponding to the vicinity of the center in the vertical direction of the ultraviolet lamp 25a. It is preferable to attach. Further, although one ultraviolet illuminance meter 7a may be used, 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 25a (25a-1 to 25a-6).

  Incidentally, in the present embodiment, as shown in FIG. 2, when mainly monitoring the amount of ultraviolet irradiation irradiated from the two ultraviolet lamps 25a, for example, for the six ultraviolet lamps 25a-1 to 25a-6, It is desirable to attach three ultraviolet illuminance meters 7a-1 to 7a-3 at equal intervals to the circumferential wall surface of the irradiation unit 20a-1 corresponding to the substantially central position of two adjacent ultraviolet lamps 25a. . That is, the ultraviolet illuminance meter 7 a-1 monitors the ultraviolet irradiation amount irradiated from the paired ultraviolet lamps 25 a-1 and 25 b-2 and transmits it to the water purification process monitoring control device 10. Similarly, the ultraviolet illuminance meter 7a-2 determines the irradiation amount of ultraviolet rays irradiated from the ultraviolet lamps 25a-3 and 25a-4 that make a pair, and the ultraviolet illuminance meter 7a-3 emits light from the paired ultraviolet lamps 25a-5 and 25a-6. Each is monitored and transmitted to the water purification treatment monitoring control device 10. Each of the ultraviolet lamps 25a-1 to 25a-6 is individually housed and protected in a protective tube 26a.

  The protection tube crack detector 8a may be of any detection type as long as it can detect the breakage of each protection tube 26a. When each protection tube 26a is damaged, water to be treated enters into each protection tube 26a. 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 pressure change. Detection is performed by either a pressure detection sensor for detection or a strain detection sensor for detecting a strain change.

  The protective tube crack detector 7a is individually attached to each protective tube 26a when the upper and lower ends of each protective tube 26a are closed in a liquid-tight state. For example, as shown in FIG. When the upper end of each protective tube 26a opened at the upper end of the skirt 27a having a concave cross section disposed at the lower portion of the cover is supported in a protruding state, one protective tube crack detector at an appropriate position in the skirt 27a 8a may be fixed and the protection tube crack may be detected.

  The lamp output adjustment power supply unit 9a has a function of increasing / decreasing the output irradiation amount of the corresponding ultraviolet lamp 25a based on an output increase / decrease signal accompanied by an individual lamp instruction output from the water purification treatment monitoring control device 10, and each ultraviolet ray It has the function of detecting the energizing current of the lamps 25a-1 to 25a-6 and sending it to the purified water treatment monitoring control device 10.

  In addition, although the structure relevant to the ultraviolet irradiation apparatus 2a in a 1st water treatment system was demonstrated, it cannot be overemphasized that the structure relevant to the ultraviolet irradiation apparatus 2b in a 2nd water treatment system is also the same.

  The water purification treatment monitoring and control device 10 includes the outputs of the treated water flow meters 4a and 4b, the measured illuminance of the ultraviolet illuminance meters 7a and 7b of the ultraviolet irradiation devices 2a and 2b, the detection signal of the protective tube crack detectors 8a and 8b, and the lamp output. Based on the lamp energization signals and the like of the adjusting power supply units 9a and 9b, it has the function of controlling the output increase / decrease of the ultraviolet lamps 25a and 25b, and controlling the inlet flow rate adjusting valves 4a and 4b and the outlet valves 6a and 6b. A pump in place of the inlet flow rate adjusting valves 4a and 4b may be controlled.

  That is, as shown in FIG. 3, the water purification process monitoring and control device 10 has an irradiation threshold value, an increase / decrease width of every 10% within the range of lamp output 60% to 100%, illuminance-irradiation table data, An input means 31 such as a keyboard or a mouse for inputting and setting the opening width of the inlet flow rate adjusting valves 4a and 4b of other systems, the disinfectant injection amount data for each abnormal event, and other necessary data when one water treatment system is abnormal; A program memory 32 for storing program data for executing a predetermined process, a monitoring control processing unit 33 composed of a CPU for executing a predetermined process in accordance with this program, and the ultraviolet illuminance meters 7a-1 to 7a-3, 7b An input interface 34 having a signal conversion function for capturing the detected illuminances of -1 to 7b-3, a display unit 35, a data storage device 36, and valves 3a, 3b, 6a Out an interface (not shown) is provided such 6b.

  The monitoring control processing unit 33 functionally includes a protection tube crack judging means 33A for judging a protection tube crack from the output of one or more protection tube crack detectors 8a and 8b, and each ultraviolet illuminance meter 7a-1 to 7a. -3, 7b-1 to 7b-3, the ultraviolet ray irradiation amount determining means 33B for determining the ultraviolet ray irradiation amount from the illuminance, and the ultraviolet ray, for example, 25a, from the determined ultraviolet ray irradiation amount and the irradiation amount threshold value. Although the output reduction determination means 33C for determining the output decrease of -1,25a-2 and the output irradiation amount of the corresponding ultraviolet lamps, for example, 25a-1 and 25a-2, are increased, the ultraviolet irradiation amount is reduced. A lamp output adjusting means 33D for increasing the output irradiation amount of the other adjacent ultraviolet lamps 25a-3, 25a-4,... When the threshold value is not reached, and a predetermined value regardless of the breakage of the protective tube and the increase in lamp output. UV Valve adjusting means 33E for performing opening / closing and opening degree control on predetermined valves 3a, 3b, 6a, 6b when the injection amount is not reached is provided, and further, if necessary, chlorine-based disinfectant injection processing means 8F is provided. Provided.

  The data storage device 36 has an irradiation threshold value, a lamp output increase / decrease width, an opening width of the inlet flow rate adjusting valves 4a and 4b of the other system when one water treatment system is abnormal, and a disinfectant injection amount data for each abnormal event. In addition, a data setting storage unit 36a for storing necessary setting data, a lamp output storage unit 36b for storing each lamp output data, and specifically described later, as shown in FIG. An illuminance-irradiation amount table 36c that defines the relationship with the ultraviolet irradiation amount and another data storage unit 36d that stores other data are provided.

Next, the operation of the water treatment system configured as described above will be described.
To-be-treated water passes from the to-be-treated water input line 1 to the to-be-treated water branch lines 1a and 1b and the input flow rate adjusting valves 3a and 3b, and from the to-be-treated water inlet pipes 21a and 21b as shown in FIG. 2a, 2b flows in the tangential direction with respect to the cylindrical container cross section of the inflow portions 20a-2, 20b-2, and sequentially moves from the upper part of the container toward the lower part of the container while turning clockwise around the container axis. To go.

  More specifically, the water to be treated is the outer periphery of protective tubes 26a and 26b that individually accommodate, for example, six ultraviolet lamps 25a-1 to 25a-6 and 25b-1 to 25b-6 arranged in the circumferential direction. It flows while descending downward while rotating in a clockwise direction while passing through the vicinity. Hereinafter, only the first water treatment system will be described for convenience of explanation.

  Here, while the water to be treated flows through the vicinity of the respective ultraviolet lamps 25 (25a-1 to 25a-6), the ultraviolet rays are irradiated from the respective ultraviolet lamps 25a. The chromaticity changes as shown. (A) shown in FIG. 6 represents a state in which the chromaticity changes with the amount of ultraviolet irradiation. That is, the water to be treated changes to blue-red-green-yellow 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 10-3. In the separation unit 20a-3, after being inactivated, the sludge substance and the treated water are separated, and the sludge substance falls into the sludge substance trap container 23a while sinking, while the treated water is treated with the treated water outlet pipe. For example, the chlorine-based disinfection water purification area 11 and other water purification processes (not shown) flow out through the outlet valve 6a of the treated water branch line 5a while entering from the lower end of 22a.

By the way, in order to inactivate the microorganisms to be sterilized, it is necessary that the ultraviolet ray irradiation dose Dose represented by the following formula is equal to or larger than the irradiation amount unique to the microorganisms to be sterilized. For example, in order to inactivate Cryptosporidium, it must be irradiated with an ultraviolet irradiation dose of 10 mJ (J is Joule) / cm ² or more.

UV irradiation dose Dose = I × t (mJ / cm ² ) (1)
In the above formula, I: ultraviolet illuminance (mW / cm ² ), t: irradiation time (s), for example, t = 1 second to 3 seconds.

  In the present embodiment, as shown in FIG. 7, in the process in which the water to be treated flows through the vicinity of all the ultraviolet lamps 25a while turning in the irradiation container 20, the ultraviolet rays are irradiated from all the ultraviolet lamps 25a. The microorganisms to be disinfected can be inactivated with high irradiation efficiency.

As the water purification treatment monitoring and control device 10, if the measured flow rate of the treated water flow meter 4 a and the measured illuminance of each ultraviolet illuminance meter 7 a are taken in and calculated based on the following equation, the ultraviolet irradiation dose Dose ^unit is calculated. Can do.
UV dose Dose ^unit = I x t x f (Flow) (mJ / cm ² ) (2)
In this equation, I: ultraviolet illuminance (mW / cm ² ), t: irradiation time (s), f (Flow): swirl flow efficiency.

The swirling flow efficiency f (Flow) varies depending on the flow rate flow (m ³ / min) of the water to be treated. Except for the flow rate flow of the water to be treated, an inherent function of the ultraviolet irradiation device 2a is obtained by analysis and experiment. Can be determined. Therefore, the ultraviolet irradiation amount Dose ^unit can be determined by the flow rate of the water to be treated and the measurement illuminance of the ultraviolet illuminance meter 6. In the present embodiment, while the water to be treated swirls in the irradiation containers 20a and 20b and flows in the vicinity of the plurality of ultraviolet lamps 25a-1 to 25a-6 (25b-1 to 25b-6), ultraviolet rays are emitted. Is irradiated. For this reason, the ultraviolet irradiation amount Dose ^unit is greatly influenced by the swirl flow efficiency f (Flow) expressed by the equation (2). The swirling flow efficiency f (Flow) varies depending on the flow rate Flow of the water to be treated and is expressed by a function specific to the ultraviolet irradiation devices 2a and 2b. In the present embodiment, the two ultraviolet irradiation devices 2a and 2b perform the same processing, so that the swirl flow efficiency f (Flow) becomes the same function. However, when the ultraviolet irradiation devices 2a and 2b have different shapes and sizes, it is necessary to determine the function of the swirl flow efficiency f (Flow) separately in advance.

  Usually, the flow rate flowing through the input line depends on the flow rate, the input line tube diameter, the processing capability of the ultraviolet irradiation devices 2a and 2b, and so on, and can be set to a substantially constant flow rate in advance.

  Therefore, a relationship as shown in FIG. 8 is established between the ultraviolet illuminance and the ultraviolet irradiation amount for each predetermined flow rate, based on the accumulation of experiments. Therefore, based on the relationship as shown in FIG. 8, the illuminance-ultraviolet irradiation amount table 36 c is created and stored in the data storage device 36.

  On the other hand, although the efficiency of the ultraviolet irradiation amount to be irradiated differs depending on the outputs of the ultraviolet lamps 25a-1 to 25a-6 (25b-1 to 25b-6), most of them are released as heat, and the operating state, lighting time, lamp It varies in the range of 15% to 35% depending on the type. The lamp does not light if the lamp output is too low. On the other hand, if the lamp output is increased too much, the lamp life is shortened. Therefore, the lamp output is controlled in the range of 60% to 100%. In order to simplify the lamp output adjustment power supply units 9a and 9b, for example, if the current output is 60% without adjusting the output, It is preferable to implement control that increases stepwise by 70%, 80%, 90%, 100% and 10%.

  Therefore, in the water purification treatment monitoring and control device 10, the flow rate adjustment valves 4a and 4b of the for-treatment water branch lines 1a and 1b are adjusted so that the swirl flow efficiency and the lamp output efficiency of the respective ultraviolet irradiation devices 2a and 2b are optimized. .

  Also, in the two water treatment systems, when the amount of treatment in one of the water treatment systems is small at the time of maintenance, breakage of the protective tube, or lamp replacement, the corresponding ultraviolet irradiation device is stopped and the ultraviolet rays of the other water treatment systems are stopped. Water purification is performed using an irradiation device.

  Therefore, the water purification process monitoring and control apparatus 10 executes a series of processes as shown in FIG. 9 according to a program stored in the program memory 32 and using the illuminance-ultraviolet irradiation amount table 3c.

  That is, the monitoring control processing unit 33 configuring the water purification processing monitoring control device 10 executes the ultraviolet irradiation amount determining means 33A. This ultraviolet ray irradiation amount determining means 33A sets X = 1 (corresponding to the first water treatment system) to a counter (not shown) at every predetermined period as shown in step S1 (S2), and then protective tube crack determining means. 33A is executed. The protection tube crack determination means 33A determines the presence or absence of a protection tube crack from the output of one or a plurality of protection tube crack detectors 8a at predetermined intervals (S3). In addition, the judgment timing of the presence or absence of the protection tube crack is not particularly limited, and an appropriate timing in a series of processes, for example, between steps S14 and S19 described later, between steps S14 and S16, and other appropriate processes. You may be on the way. Further, for example, when the output of the protection tube crack detector 8a reaches a predetermined level, an interruption may be automatically made to determine whether or not there is a protection tube crack (S3).

  By the way, the monitoring control processing unit 33 executes the valve adjusting means 33E when it is determined in step S3 that the protective tube is broken. The valve adjusting means 33E closes the inlet flow rate adjusting valve 4a and the outlet valve 6a (S4), stops the ultraviolet irradiation device 2a of the first water treatment system, and sets the inlet flow rate adjusting valve for the abnormal state from the data setting storage unit 36a. Based on the opening degree data of 4b, the opening degree of the inlet flow rate adjusting valve 4b is adjusted (S5), and the amount of treated water in the ultraviolet irradiation device 2b is increased (S6). That is, the opening degree of the inlet flow rate adjusting valve 4b is adjusted so that the entire amount of water to be treated flows into the ultraviolet irradiation device 2b.

  Then, after adjusting the opening of the inlet flow rate adjustment valve 4b, an alarm is issued to the monitoring room (S6), and the chlorine-based disinfectant injection processing means 33F is executed as necessary. That is, it is determined whether or not the disinfectant is to be injected (S7), and only when the injection flag is set, the injection is made into the chlorine-based disinfectant injection device 12 based on the injection amount determined for each abnormal event. An instruction is sent out and a chlorine-based disinfectant is injected into the chlorine-based disinfecting water purification area 11 (S8). For example, the chlorine-based disinfectant injection processing means 33F is not executed if the microorganisms to be disinfected can be sufficiently inactivated by the ultraviolet irradiation device 2b of the second water treatment system.

  If it is determined in step S3 that there is no protective tube cracking, the monitoring control processing unit 33 executes the ultraviolet ray irradiation amount determining means 33B. This ultraviolet irradiation amount determination means 33B corresponds to Y = 1 (corresponding to ultraviolet illuminance meter 7a-1) and Z-1 (lamp 25a-1 or paired lamps 25a-1, 25a-2) in a counter (not shown). Is set (S9, S10), the illuminance measured by the ultraviolet illuminance meter 7a-1 is taken in (S11), and the illuminance-ultraviolet irradiation amount table shown in FIG. The amount of ultraviolet irradiation is determined from 36c (S12). The illuminance measured by all the ultraviolet illuminance meters 7a-1 to 7a-3 may be taken in at the same time.

  In addition, since the measurement illumination intensity of each ultraviolet illuminance meter 7a-1 to 7a-3 changes when the ultraviolet transmittance of to-be-treated water changes, the change in the ultraviolet transmittance of to-be-treated water is easy. Can be reflected. Similarly, the UV output irradiation amount decreases due to a decrease in the UV output amount due to lamp deterioration or lamp failure, or due to dirt or scratches on the surface of the protective tube 26a. Therefore, since the measurement illuminance decreases as the output irradiation amount decreases, it can be similarly reflected in the ultraviolet irradiation amount.

  Therefore, the monitoring control processing unit 33 executes lamp output decrease determination means 33B for determining a decrease in output due to lamp deterioration, lamp failure, dirt or scratches on the surface of the protective tube 26a. The lamp output decrease determination means 33B compares the ultraviolet ray irradiation amount determined in step S12 with the irradiation amount threshold value set in the data setting storage unit 36a, and determines whether the ultraviolet ray irradiation amount is larger than the irradiation amount threshold value. (S13). The dose threshold corresponds to a value sufficient to inactivate the microorganisms to be disinfected.

  Here, when the determined ultraviolet irradiation dose is larger than the irradiation dose threshold value, it has the ability to sufficiently inactivate the microorganisms to be disinfected, so that the next measurement result of the ultraviolet illuminance meter 7a-2 is obtained. Therefore, Y = 1 is incremented by +1 (S15), and the process returns to step 10 to repeat the same processing. Whole water treatment system when the ultraviolet irradiation amount determined based on the measured illuminance of all the ultraviolet illuminance meters 7a-1 to 7a-3 is larger than the irradiation amount threshold value, and after the processing of step S7 or step S8 (S16), if not, increment +1 to X (17), proceed to step S3, and check the ultraviolet irradiation device 2b in the second water treatment system To do. Then, after the check on the ultraviolet irradiation device 2b is completed, it is determined whether or not the processing is continued (S18). If the processing is continued, the check on the ultraviolet irradiation device 2a in the first water treatment system is continued.

  On the other hand, if it is determined in step S13 that the determined ultraviolet irradiation amount is smaller than the irradiation amount threshold value, the monitoring control processing unit 33 executes the lamp output adjustment unit 33D.

  When the lamp output adjusting means 33D determines that the output doses of the ultraviolet lamps 25a-1 and 25a-2 are decreasing from the illuminance measured by the ultraviolet illuminance meter 7a-1, the predetermined setting set in the data setting storage unit 36a. Based on the output increase / decrease width, the output of the corresponding lamp, for example, a 10% increase command signal is sent to the lamp output adjustment power supply unit 9a (S19). Here, when the lamp output adjustment power supply unit 9a receives the output increase command signal of the corresponding lamp, the lamp output adjustment power supply unit 9a performs adjustment to increase the output irradiation amount of the corresponding ultraviolet lamps 25a-1 and 25a-2 by the output amplification.

  After outputting the lamp output increase command signal, the lamp output adjusting means 33D determines whether the output irradiation amount of the corresponding ultraviolet lamps 25a-1 and 25a-2 has reached the output upper limit value (S20), and still determines the predetermined output upper limit. If the value has not been reached, the process returns to step S11, the illuminance after the increase in lamp output of the ultraviolet lamps 25a-1 and 25a-2 is taken in, and the same processing is repeated.

  Further, when the ultraviolet irradiation amount does not reach the threshold value even though the lamp adjustment outputs of the ultraviolet lamps 25a-1 and 25a-2 reach the output upper limit value, it is determined whether or not to increase the output of the other lamps. If it is determined (S21) and increases, output increase command signals of the adjacent lamps 25a-3 and 25a-4 are sent to the lamp output adjustment power supply unit 9 in steps S22 and S23 (S19), and the same processing is repeated. Execute.

As described above, the output irradiation amount of the adjacent lamp is increased. If the UV dose Dose ^unit still does not provide a dose sufficient to inactivate the microorganisms to be disinfected, the lamp output doses of all the UV lamps 25a-1 to 25a-6 are increased. Still, when the sufficient dose is not reached, the valve adjusting means 33E is executed.

  This valve adjusting means 33E closes the inlet flow rate adjusting valve 4a and the outlet valve 6a completely (S24), or reduces the amount of treated water by reducing the opening of the valves 4a and 6a.

  When the valves 4a and 6a are closed, the processing amount is increased by increasing the opening of the inlet flow rate adjustment valve 4b in the second water treatment system (S25). And the warning which is the fall state of the lamp output containing the protection tube dirt of the ultraviolet irradiation device 2a in a 1st water treatment system is output to a monitoring room (S26). When the opening degree of the valves 4a and 6a is reduced, for example, the opening amount of the inlet flow rate adjusting valve 4b in the second water treatment system is increased by the amount of the restriction amount to increase the processing amount (S25), or the inlet flow rate. The opening degree of the adjustment valve 4b is left as it is.

  In step S21, if the output of other lamps is not increased, it is determined whether or not an alarm is output (S27). If an alarm is issued, an alarm is output (S26). If no alarm is output, step S15 is performed. Migrate to

  Further, after outputting an alarm, it is determined whether or not to execute the chlorine-based disinfectant injection processing means 33F (S27), and in the case of injection, a chlorine-based disinfectant is injected (S28). After injecting the chlorine-based disinfectant or when not injecting the chlorine-based disinfectant, the process returns to step S16 and proceeds to the second water treatment system.

  Therefore, according to the embodiment as described above, the water to be treated is, for example, clockwise around the outer periphery of the protective tube 26a that accommodates, for example, six ultraviolet lamps 25a-1 to 25b-6 arranged in the circumferential direction. In addition, while circulating spirally from the upper part of the container to the lower part, it is circulated without waste, and during that time, the ultraviolet rays are irradiated from the ultraviolet lamps 25a-1 to 25a-6, so that the water to be treated can be efficiently irradiated with ultraviolet rays.

  Moreover, when an output irradiation amount falls by deterioration of some ultraviolet lamps, for example, 25a-1, the measurement illumination intensity of a corresponding ultraviolet illuminance meter 7a-1 falls, and an ultraviolet irradiation amount falls. Therefore, when the output irradiation amount of the ultraviolet lamp 25a-1 decreases, not only the output irradiation amount of the ultraviolet lamps 25a-1 and 25a-2 is gradually increased but also the predetermined irradiation threshold is reached even when the maximum irradiation output is output. When the value does not reach the value, the output irradiation amount of the other adjacent ultraviolet lamps 25a-3, 25a-4, etc. is increased, so that a sufficient ultraviolet irradiation amount to inactivate the microorganisms to be disinfected can be secured. When some of the ultraviolet lamps, for example, 25a-1 are damaged or failed, the lamp output adjustment power supply unit 9 detects from the energized current, transmits it to the water purification treatment monitoring control device 10, and outputs the other adjacent lamps as necessary. By raising the value, it is possible to perform the ultraviolet irradiation treatment without stopping the operation.

  Furthermore, if the output of some UV lamps, for example 25a-1 or all UV lamps 25a-1 to 25a-6, is not reached enough to inactivate the microorganisms to be disinfected, an alarm is issued. Because it outputs, it is possible to take necessary processing including replacement of the ultraviolet lamp whose output irradiation amount has decreased.

  In addition, if an ultraviolet lamp or a protective tube breaks due to a sudden impact, etc., even if the operation of the water treatment system is stopped or a broken quartz glass piece or mercury enclosed in the lamp leaks, By the centrifugal separation action and the gravity action by the spiral swirling flow of the processing fluid, it can be reliably recovered in the trap container 23a and does not flow out while being mixed into the processing water.

  Furthermore, since the ultraviolet irradiation amount is determined from the measured illuminance of the ultraviolet illuminance meters 7a-1 to 7a-3, and the irradiation amount is smaller than the irradiation amount threshold value, the output irradiation amount can be adjusted individually or in pairs for the corresponding ultraviolet lamps. It is possible to optimize the output irradiation amount of the ultraviolet lamps individually or in pairs.

  Furthermore, when one ultraviolet illuminance meter 7a is attached to the wall of the irradiation unit 20a-1 of the irradiation container 20, a region that is a shadow of the treated water outlet pipe 22a is generated, and is opposite to the installation location of the ultraviolet illuminance meter 7a. Even if the output dose of the UV lamp decreases for some reason, it cannot be detected. However, if the ultraviolet illuminance meter 7a is arranged at the center of two adjacent ultraviolet lamps for a plurality of ultraviolet lamps, abnormalities in all the ultraviolet lamps 25a-1 to 25a-6 can be detected and the output irradiation amount Can be controlled in an optimum state.

  Furthermore, since the illuminance meter in the conventional ultraviolet irradiation device detects the ultraviolet rays irradiated from all the ultraviolet lamps in the ultraviolet irradiation device, even if a plurality of illuminance meters are provided, the abnormality of the ultraviolet lamp is detected. Is difficult. To solve this problem, it is possible to install an illuminometer on each lamp and in the vicinity of it, but it is difficult to detect the decrease in UV transmittance due to high cost and water quality deterioration, and inactivate the target microorganisms with certainty. There is a risk that it will not be possible.

  In the present embodiment, since the treated water outlet pipe 22a is provided on the central axis of the container 20, it is possible to accurately detect the lamp abnormality by the ultraviolet illuminance meters 7a-1 to 7a-3, and to optimally control the lamp output. it can.

  Furthermore, by connecting a plurality of ultraviolet irradiation devices, for example, 2a and 2b in parallel, when one of them is out of order, the performance is deteriorated, the lamp / protection tube is damaged, or the processing amount larger than the large specification is required, the other processing is performed. By increasing the volume or by increasing the throughput of both, it is possible to flexibly respond to the user's request, and it is possible to surely disinfect the target microorganisms without stopping the water purification system or water supply, and safe water Can distribute water.

  Furthermore, by making it possible to appropriately adjust the throughput of the plurality of ultraviolet irradiation devices 2a and 2b, it is possible to set the swirling flow efficiency and the output efficiency of the lamp to be optimal, extending the replacement cycle by extending the lamp life, Running costs such as electricity bills can be reduced.

(Other embodiments)
(1) As the water purification treatment monitoring and control apparatus 10, the ultraviolet irradiation amount is determined using the illuminance-ultraviolet irradiation table 36c. For example, instead of the illuminance-ultraviolet irradiation table 36c, the data setting of the data storage device 36 is performed. The arithmetic expression data of the expression (2) described above is set in the storage unit 36a, and the ultraviolet ray irradiation amount calculation based on the expression of expression (2) is used as the monitoring control processing section 33 instead of the ultraviolet irradiation amount determination means 33B. The structure which provides a means may be sufficient.

  The ultraviolet ray irradiation amount calculating means of the water purification process monitoring and control device 10 takes in the measured flow rate of the flow meter 4a and the measured illuminance of the ultraviolet illuminance meter 7a in step S12 shown in FIG. 9, and then sets the data setting storage unit 36a. Based on the calculated equation, the ultraviolet irradiation amount is calculated in step S12. Since other configurations and processing procedures are the same as those in FIGS. 3 and 9, the description thereof is omitted here.

  Also in this embodiment, the same effect as the above-described embodiment can be obtained.

(2) About lamp damage or failure.
The water purification process monitoring and control device 10 detects energization currents of the ultraviolet lamps 25a-1 to 25a-6 via the lamp output adjustment power supply unit 9a. Therefore, since it can be determined that at least a part of the ultraviolet lamps is broken or malfunctioned when the energization current is interrupted, the output irradiation amount of the adjacent ultraviolet lamps is increased as described above, or the process of increasing the output irradiation amount is not performed. It is also possible to reduce the processing amount by narrowing the valve 4a, output an alarm, and perform a process of injecting a chlorine-based disinfectant as necessary. Further, if the replacement message of the damaged or failed ultraviolet lamp is displayed on the display unit 35, the corresponding ultraviolet lamp can be quickly replaced.

(3) Furthermore, in the above embodiment, in the case of light extinction due to breakage of the protective tube or failure of the lamp, the treatment of the corresponding water treatment system is stopped and the treated water of the other water treatment system is increased. For example, when it is determined that the lamp output irradiation amount is reduced, when the ultraviolet irradiation amount does not reach the irradiation amount threshold value regardless of the adjustment of the output amount of the ultraviolet lamp, it belongs to the corresponding ultraviolet irradiation device 2a. The valve 4a may be provided with a valve valve adjusting means 33E that lowers the opening of the valve 4a to reduce the amount of water to be treated and flows into the corresponding ultraviolet irradiation device 2a.

(4) Furthermore, as the water purification treatment monitoring control device 10, when the total flow rate of the fluid to be treated is small, the opening degree of the valve 4a belonging to one ultraviolet irradiation device 2a is increased and the ultraviolet lamps 25a-1 to 25a-6 Adjusting to increase the throughput of the fluid to be treated by increasing the output irradiation amount, lowering the opening of the bulb 4b belonging to the other ultraviolet irradiation device 2b, and lowering the outputs of the ultraviolet lamps 25b-1 to 25b-6 It is also possible to have a configuration provided with means to do this.

(5) Further, in the monitor control processing unit 33, the lamp output decrease determining unit 33B compares the ultraviolet ray irradiation amount determined in step S12 with the irradiation amount threshold value set in the data setting storage unit 36a, and the ultraviolet ray is reduced. It is determined whether or not the dose is larger than the dose threshold (S13), and if the determined UV dose is larger than the dose threshold, it exceeds the ability to sufficiently inactivate the microorganisms to be disinfected. It may be determined that the excessive amount of irradiation is applied, and the lamp output adjusting means 33D may be executed to reduce the output of the corresponding lamp. That is, the lamp output adjusting means 33D determines that the output irradiation amount of the ultraviolet lamps 25a-1 and 25a-2 is excessive from the illuminance measured by the ultraviolet illuminance meter 7a-1, and the predetermined setting set in the data setting storage unit 36a. Based on the output increase / decrease width, an output of the corresponding lamp, for example, a 10% decrease command signal is sent to the lamp output adjustment power supply unit 9a (S19). Here, when the lamp output adjustment power supply unit 9a receives the output reduction command signal of the corresponding lamp, the lamp output adjustment power supply unit 9a performs adjustment to reduce the output irradiation amount of the corresponding ultraviolet lamps 25a-1 and 25a-2 by the output reduction width.

  After outputting the lamp output reduction command signal, the lamp output adjusting means 33D determines whether or not the output dose of the corresponding ultraviolet lamps 225a-1 and 25a-2 has reached the dose threshold (S20), and is still predetermined. If the dose threshold value has not been reached, the process returns to step S11, and the illuminance after the lamp output reduction of the ultraviolet lamps 225a-1 and 25a-2 is taken in and the same processing is repeated.

  The lamp output decrease determination means 33B of the monitoring control processing unit 33 compares the ultraviolet ray irradiation amount determined in step S12 with the irradiation amount threshold value set in the data setting storage unit 36a, and the ultraviolet ray irradiation amount is determined as the irradiation amount. If the threshold value has been reached (S13), it has the ability to sufficiently inactivate the microorganisms to be disinfected, so in order to obtain the next measurement result of the UV illuminance meter 7a-2, +1 increment to Y = 1 (S15), the process returns to step S10 and the same process is repeated. The other configurations and functions are not different from the above-described configuration in which the lamp output is increased when the ultraviolet irradiation amount is smaller than the irradiation threshold value.

  In addition, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. In addition, the embodiments can be implemented in combination as much as possible, and in that case, the effect of the combination can be obtained. Further, each of the above embodiments includes various higher-level and lower-level inventions, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, when an invention is extracted because some constituent elements can be omitted from all the constituent elements described in the means for solving the problem, the omitted part is used when the extracted invention is implemented. Is appropriately supplemented by well-known conventional techniques.

The block diagram which shows one Embodiment of the water treatment system which concerns on this invention. The figure which shows the arrangement | positioning relationship between a ultraviolet lamp and a ultraviolet illuminance meter. The block diagram which shows one specific example of a water purification process monitoring control apparatus. The table figure which prescribed | regulated the relationship between the ultraviolet illumination intensity data and ultraviolet irradiation amount data in each flow volume. The figure explaining a mode that the to-be-processed water was swirled in the irradiation container. The figure showing the state from which chromaticity changes as to-be-processed water receives irradiation of an ultraviolet-ray. The figure explaining the irradiation efficiency of the ultraviolet irradiation amount with respect to the flow volume in the past and this invention. The relationship characteristic figure of the ultraviolet illumination intensity and ultraviolet irradiation amount with respect to each predetermined flow volume. The flowchart explaining a series of process examples in the water purification process monitoring control apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... treated water input line, 1a, 1b ... treated water branch line, 2a, 2b ... ultraviolet irradiation device, 3a, 3b ... inlet flow rate adjusting valve, 4a, 4b ... treated water flow meter, 5a, 5b ... treated Water branch line, 5 ... treated water confluence output line, 7a-1 to 7a-3, 7b-1 to 7b-3 ... ultraviolet illuminance meter, 8a, 8b ... protective tube crack detector, 9a, 9b ... lamp output adjustment Power supply unit, 10 ... Clean water treatment monitoring control device, 20a, 20b ... Irradiation container, 20a-1, 20b-1 ... Irradiation unit, 20a-2, 20b-2 ... Inflow part, 20a-3, 20b-3 ... Separation part 21a, 21b ... treated water inlet pipes, 22a, 22b ... treated water outlet pipes, 23a, 23b ... pollutant trap containers, 24a, 24b ... pollutant collection pipes, 25a, 25b (25a-1 to 25a-6, 25b-1 to 25b-6 ... UV lamp, 26a, 26b ... protection tube, 32 ... program memory, 33 ... monitoring control processing unit, 33A ... protection tube crack judgment means, 33B ... UV irradiation amount determination means, 33C ... lamp output decrease judgment means, 33D ... lamp Output adjusting means, 33E... Valve adjusting means, 33F... Chlorine-based disinfectant injection processing means.

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. At least two UV irradiation devices provided in parallel;
Of the upstream line and the downstream line of each ultraviolet irradiation device connected to a plurality of branch lines branched from the input line of the fluid to be processed, a flow rate adjusting valve or pump installed at least upstream,
Illuminance measuring means for measuring ultraviolet illuminance inside the container;
Ultraviolet irradiation amount determining means for determining the ultraviolet irradiation amount based on a predetermined flow rate of the fluid to be processed flowing into the container and the illuminance measured by the illuminance measuring means, and the determined ultraviolet irradiation amount is the contamination of the protective tube When the output of the ultraviolet lamp is lower than the threshold sufficient for inactivation of the microorganisms to be sterilized, the opening of the valve belonging to the corresponding ultraviolet irradiation device is lowered, or the discharge amount of the pump is lowered to A water treatment system comprising: a water purification treatment monitoring and control device having a valve adjusting means for reducing the amount of fluid to be treated and flowing into the corresponding 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. At least two UV irradiation devices provided in parallel;
Of the upstream line and the downstream line of each ultraviolet irradiation device connected to a plurality of branch lines branched from the input line of the fluid to be processed, a flow rate adjusting valve or pump installed at least upstream,
Illuminance measuring means for measuring ultraviolet illuminance inside the container;
Ultraviolet irradiation amount determining means for determining the ultraviolet irradiation amount based on a predetermined flow rate of the fluid to be processed flowing into the container and the illuminance measured by the illuminance measuring means, and the determined ultraviolet irradiation amount is the contamination of the protective tube Or when the valve or pump belonging to the relevant ultraviolet irradiation device is closed below the threshold sufficient for inactivation of the microorganisms to be disinfected due to the decrease in the output of the ultraviolet lamp, and the opening degree of the valve belonging to another ultraviolet irradiation device A water treatment system comprising: a water purification process monitoring and control device having a valve adjusting means for increasing the treatment amount of the fluid to be treated by increasing the discharge amount of the pump and flowing into the other 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. an ultraviolet irradiation apparatus provided et the at least two parallel,
Of the upstream line and the downstream line of each ultraviolet irradiation device connected to a plurality of branch lines branched from the input line of the fluid to be processed, a flow rate adjusting valve or pump installed at least upstream,
Illuminance measuring means for measuring ultraviolet illuminance inside the container;
Ultraviolet irradiation amount determining means for determining the ultraviolet irradiation amount based on a predetermined flow rate of the fluid to be processed flowing into the container and the illuminance measured by the illuminance measuring means, and the determined ultraviolet irradiation amount is the contamination of the protective tube And a lamp output decrease determination means for determining that the output dose of the UV lamp is decreased when the threshold is below a threshold sufficient for inactivating the microorganisms to be disinfected due to the output decrease of the UV lamp, and a decrease in the output dose A lamp output adjusting means for adjusting the output dose of the ultraviolet lamp so that the UV dose reaches the dose threshold, and regardless of the adjustment of the output dose of the UV lamp. When the ultraviolet ray irradiation amount does not reach the irradiation amount threshold value, the opening degree of the valve belonging to the corresponding ultraviolet ray irradiation device is lowered, or the discharge amount of the pump is lowered and the processed object Water treatment system, characterized in that a water treatment monitoring control device reduces the amount of processing and a valve adjustment means flowing into the appropriate UV irradiation apparatus. 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. an ultraviolet irradiation apparatus provided et the at least two parallel,
Of the upstream line and the downstream line of each ultraviolet irradiation device connected to a plurality of branch lines branched from the input line of the fluid to be processed, a flow rate adjusting valve or pump installed at least upstream,
Illuminance measuring means for measuring ultraviolet illuminance inside the container;
Ultraviolet irradiation amount determining means for determining the ultraviolet irradiation amount based on a predetermined flow rate of the fluid to be processed flowing into the container and the illuminance measured by the illuminance measuring means, and the determined ultraviolet irradiation amount is the contamination of the protective tube And a lamp output decrease determination means for determining that the output dose of the UV lamp is decreased when the threshold is below a threshold sufficient for inactivating the microorganisms to be disinfected due to the output decrease of the UV lamp, and a decrease in the output dose A lamp output adjusting means for adjusting the output dose of the ultraviolet lamp so that the UV dose reaches the dose threshold, and regardless of the adjustment of the output dose of the UV lamp. when the amount of UV irradiation does not reach the dose threshold, closing the valve or pump belonging to the relevant UV irradiation apparatus, the opening degree of the valve belonging to another ultraviolet irradiation device also Water treatment system, characterized in that a water purification process monitoring controller with the increased discharge amount of the pump by increasing the throughput of the fluid to be treated and a valve adjusting means for flowing the other UV irradiation apparatus. In the water treatment system according to any one of claims 1 to 4 ,
When at least three UV irradiation devices are provided in parallel,
A protective tube crack detecting means for detecting the protective tube crack is provided,
The water purification treatment monitoring and control device closes a valve or pump belonging to the ultraviolet irradiation device when it determines that the protective tube is broken from the output of the protective tube crack detection means belonging to the one ultraviolet irradiation device, and the other ultraviolet irradiation device. A water treatment system comprising valve adjusting means for increasing a processing amount of the fluid to be treated by increasing an opening degree of a valve or a discharge amount of a pump and flowing into the other ultraviolet irradiation device . In the water treatment system according to any one of claims 1 to 5 ,
A flow rate measuring means for measuring the flow rate of the fluid to be treated is provided in the input branch line of each ultraviolet ray irradiation device, and the water purification process monitoring and control device is a valve belonging to one ultraviolet ray irradiation device when the total flow rate of the fluid to be treated is small. Increase the processing amount of the fluid to be processed by increasing the opening degree of the pump or the discharge amount of the pump and increasing the output of the ultraviolet lamp, and lowering the opening degree of the valve belonging to the other ultraviolet irradiation device or the discharge amount of the pump, and A water treatment system comprising means for adjusting the output of an ultraviolet lamp to decrease. In the water treatment system according to any one of claims 1 to 5,
A flow rate measuring means for measuring a flow rate of the fluid to be processed flowing into each of the ultraviolet irradiation devices;
A water purification treatment monitoring and control device having an ultraviolet ray irradiation amount calculating means instead of the ultraviolet ray irradiation amount determining means for calculating the ultraviolet ray irradiation amount based on the flow rate measured by the flow rate measuring means and the illuminance measured by the illuminance measuring means. And a water treatment system. In the water treatment system according to any one of claims 1 to 7,
In each of the ultraviolet irradiation devices, one or a plurality of ultraviolet lamps, which are parallel to the axis of the container and individually stored in a protective tube, are arranged inside a cylindrical container, and the upper direction from the upper side to the lower side in the container. A water treatment system for irradiating ultraviolet rays from the ultraviolet lamp onto a fluid to be treated that descends while turning. In the water treatment system according to any one of claims 1 to 7,
The illuminance measuring means attaches an ultraviolet illuminance meter to the wall position of the container so as to correspond to a predetermined number of ultraviolet lamp pairs among the plurality of ultraviolet lamps, and the illuminance measured by each ultraviolet illuminance meter is measured. Send to the water purification treatment monitoring and control device,
The water purification treatment monitoring and control device monitors the output irradiation amount of the individual or pair of ultraviolet lamps from the measured illuminance transmitted from the illuminance measuring means, and adjusts the output irradiation amount of the individual or pair of ultraviolet lamps. Water treatment system characterized by The water treatment system according to claim 9,
In the case where the water purification treatment monitoring and control device adjusts the output dose of the UV lamps individually or in pairs, but the UV dose does not reach the dose threshold sufficient to activate the microorganisms to be disinfected A water treatment system characterized by adjusting the output irradiation amount of an ultraviolet lamp adjacent to each other or each pair.

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