JP2018171321A - Circulation liquid control device and method of controlling circulation liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circulation liquid control device and a method of controlling a circulation liquid capable of efficiently irradiating microbes contaminating a liquid phase with ultraviolet and improving the deactivation rate of the microbe even in the case of low ultraviolet transmittance of the liquid while maintaining a total amount of the liquid used circularly in a facility as long as possible.SOLUTION: There is provided a circulation liquid control device 10 used for a facility 2 comprising a circulation circuit 1 circulating the liquid in which microbes breed accompanying the use thereof. The device is equipped with: a classification part 20 separating by centrifugal separation, a microbe-including liquid circulating in the circuit 1 into a concentrated liquid in which the microbe is concentrated and a non-concentration liquid in which the concentrated liquid is removed; a deactivation treatment part 30 deactivation-treating the microbe in the concentrated liquid classified by the classification part 20 by ultraviolet irradiation; and a rotary flow part 40 returning the non-concentration liquid and the concentrated liquid after deactivation treatment into the circulation circuit 1.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for managing a liquid in which microorganisms propagate with use in equipment.

  For example, machine tool equipment is known as this type of equipment. Conventionally, water-soluble cutting oil has been used for the purpose of lubrication and cooling in machine tool equipment that performs metal processing such as cutting and grinding. This type of water-soluble cutting oil is used for lubrication and cooling in machine tool equipment, and then returned to the circulation circuit for supplying cutting oil from the machine tool equipment and reused. Here, with this type of water-soluble cutting oil, microorganisms such as bacteria may be mixed in the liquid phase with the circulation use in the equipment, and the microorganisms may gradually propagate in the liquid phase to generate a strange odor. Such a strange odor not only worsens the working environment in the facility, but also changes the flow rate due to the clogging of the cutting oil nozzle attached to the machine tool, causing deterioration of machining conditions affecting the quality of the workpiece. There's a problem.

  Therefore, as a technique for solving this type of problem, for example, Patent Document 1 discloses an ultraviolet irradiation device that irradiates a microorganism mixed in a liquid with ultraviolet rays. In the technique described in this document, the liquid used in the facility is thinned, and the thinned portion is irradiated with ultraviolet rays by an ultraviolet lamp. According to the technique described in the same document, ultraviolet light is irradiated to the thinned part of the liquid, so that even when the liquid has a low ultraviolet transmittance, the microorganisms mixed in the liquid phase are irradiated with ultraviolet light and inactivated. can do.

JP 2011-25676 A

  However, the ultraviolet irradiation device described in Patent Document 1 is intended for ultraviolet irradiation of the entire amount of liquid used in the facility, and is used in the facility because the entire amount of liquid is irradiated with ultraviolet rays after being thinned sequentially. There is room for improvement in efficiently irradiating the microorganisms existing in the whole liquid with ultraviolet rays.

  Therefore, the present invention has been made paying attention to such problems, and is a case where the total amount of liquid circulated and used in the facility is maintained as much as possible while the ultraviolet transmittance of the liquid is low. However, it is an object of the present invention to provide a circulating fluid management apparatus and a circulating fluid management method capable of efficiently irradiating ultraviolet rays to microorganisms such as bacteria mixed in the liquid phase and improving the inactivation rate of the microorganisms. .

  In order to solve the above-mentioned problems, a circulating fluid management device according to one aspect of the present invention is a circulating fluid management device used in equipment including a circulation circuit that circulates a fluid in which microorganisms propagate with use. A classification part for separating the concentrated microorganisms in the liquid circulating through the circulation circuit into a concentrated liquid by centrifugation and a non-concentrated liquid obtained by removing the concentrated liquid from the liquid; An inactivation treatment unit for irradiating the concentrate with ultraviolet rays to inactivate microorganisms in the concentrate, and a reflux unit for returning the non-concentrated liquid and the inactivated concentrate to the circulation circuit. It is characterized by providing.

  According to the circulating fluid management apparatus according to one aspect of the present invention, the liquid used in the circulating circuit of the facility can be classified by centrifugation using the classification unit. And since the inactivation treatment can be performed by irradiating the concentrated liquid containing the microorganisms classified in the classification section by irradiating with ultraviolet rays, the technology to make the total amount of the liquid used in the equipment to be irradiated with ultraviolet rays In comparison with the above, the non-concentrated liquid can be excluded from the ultraviolet irradiation target. Therefore, even when the ultraviolet transmittance of the liquid is low, it is possible to efficiently irradiate the microorganisms mixed in the liquid phase with high energy efficiency. And according to the circulating fluid management apparatus concerning one mode of the present invention, the non-concentrated liquid and the concentrated liquid after the inactivation treatment are returned to the circulating circuit by the circulating portion, so that the total amount of the liquid that is circulated in the facility Can be maintained as much as possible.

  In order to solve the above problems, a method for managing a circulating liquid according to an aspect of the present invention is a method for managing a liquid that is used by being circulated in equipment and propagates microorganisms as it is used. The liquid is classified into a concentrated liquid containing microorganisms and a non-concentrated liquid obtained by removing the concentrated liquid from the liquid by centrifugation, and the concentrated liquid classified in the classification process is irradiated with deep ultraviolet rays for concentration. An inactivation treatment step for inactivating microorganisms in the liquid; and a reflux step for returning the non-concentrated liquid and the concentrated liquid after the inactivation treatment to the liquid.

  According to the method for managing a circulating liquid according to one aspect of the present invention, in the classification process, the liquid that is circulated and used in the equipment is classified by centrifugation, and in the inactivation process, only the concentrated liquid containing microorganisms is classified. Therefore, the non-concentrated liquid can be excluded from the ultraviolet irradiation target as compared with the technique in which the entire amount of the liquid used in the facility is the target of the ultraviolet irradiation. Therefore, ultraviolet rays can be efficiently irradiated with high energy efficiency to microorganisms mixed in the liquid phase. According to the method for managing the circulating liquid according to the present invention, the non-concentrated liquid and the concentrated liquid after the inactivation treatment are returned to the liquid in the recirculation process. Can be maintained as much as possible.

  Here, in the present specification, “microorganism” is a superordinate concept including fungi and viruses, such as chlorine-resistant microorganisms Cryptosporidium and other microorganisms such as Escherichia coli, viruses, and algae in treated water. Is defined as including.

  Further, in this specification, “concentrated liquid” is defined to mean a liquid on the side where more microorganisms to be treated are present as a result of classification. That is, when the specific gravity of the microorganism to be processed is heavy relative to the liquid, the outer peripheral side of the centrifugation is the concentrated liquid. On the other hand, when the specific gravity of the microorganism to be processed is light relative to the liquid, the inner peripheral side of the centrifugation is the concentrated liquid.

  As described above, according to the present invention, it is possible to prevent microorganisms mixed in the liquid phase even when the ultraviolet transmittance of the liquid is low while maintaining the total amount of the liquid circulated and used in the facility as much as possible. Therefore, it is possible to efficiently irradiate ultraviolet rays and improve the inactivation rate of microorganisms.

It is a mimetic diagram showing a first embodiment of equipment provided with a circulating fluid management device concerning one mode of the present invention. It is a schematic diagram which shows 2nd embodiment of the installation provided with the circulating fluid management apparatus which concerns on 1 aspect of this invention. It is a schematic diagram which shows 3rd embodiment of the installation provided with the circulating fluid management apparatus which concerns on 1 aspect of this invention. It is a schematic diagram which shows 4th embodiment of the installation provided with the circulating fluid management apparatus which concerns on 1 aspect of this invention. It is a schematic diagram which shows 5th embodiment of the equipment provided with the circulating fluid management apparatus which concerns on 1 aspect of this invention. It is a schematic diagram which shows 6th embodiment of the equipment provided with the circulating fluid management apparatus which concerns on 1 aspect of this invention. It is a schematic diagram which shows 7th embodiment of the equipment provided with the circulating fluid management apparatus which concerns on 1 aspect of this invention.

  Hereinafter, each embodiment of the present invention will be described with reference to the drawings as appropriate. The drawings are schematic. For this reason, it should be noted that the relationship between the thickness and the planar dimension, the ratio, and the like are different from the actual ones, and the dimensional relationship and the ratio are different between the drawings. In addition, each embodiment shown below exemplifies an apparatus and a method for embodying the technical idea of the present invention, and the technical idea of the present invention is the material, shape, structure, The arrangement and the like are not specified in the following embodiments.

[First embodiment]
First, a first embodiment will be described with reference to FIG. In addition, the example of 1st embodiment demonstrates the basic structure of this invention.
As shown in the figure, the circulating fluid management device 10 of the first embodiment is used for equipment 2 including a circulating circuit 1. The equipment 2 can be a variety of equipment as long as it circulates in the circulation circuit 1 a liquid in which microorganisms propagate with use. The facility 2 of this embodiment is a machine tool facility that performs metal processing such as cutting and grinding in a machining factory, for example. Further, the liquid circulating in the circulation circuit 1 is, for example, water-soluble cutting oil used in machine tool equipment (hereinafter also simply referred to as “cutting oil”).

  The circulation circuit 1 has a primary side pipe line 7 connected to the upstream side of the equipment 2 and a secondary side pipe line 8 connected to the downstream side of the equipment 2, and these pipe lines 7 and 8 are cutting oil. The piping is circulated. In the first embodiment, the circulating fluid management device 10 is interposed between the primary side pipe line 7 and the secondary side pipe line 8. A first pump 5 is provided on the upstream side of the circulating fluid management device 10 so that cutting oil necessary for the inactivation process can be supplied to the circulating fluid management device 10 at a desired flow rate and a desired pressure.

  The circulating fluid management device 10 includes a cyclone classifier 20. The classifier 20 has a conical cyclone part, and the introduction pipe line from the first pump 5 is connected to the side of the cyclone part on the large diameter part side. In the classifier 20, the upper center of the large-diameter portion is connected to an overflow pipe that discharges a classification liquid having a low relative specific gravity, and the lower center of the small-diameter portion of the cyclone section discharges a classification liquid having a high relative specific gravity. Connected to the underflow line.

  In the classifier 20, the cutting oil introduced from the first pump 5 at a desired flow rate and pressure at a desired flow rate is turned into a high-speed swirl flow along the feed chamber in the cyclone section, and has a low relative specific gravity by centrifugation. The classification liquid is led to the overflow pipe, and the classification liquid having a high relative specific gravity is led to the underflow pipe.

  Here, in the circulating fluid management apparatus 10 according to the first embodiment, the microorganism that is the target of the inactivation process is an example assuming that the specific gravity is heavier than the cutting oil. That is, in this embodiment, as a result of classification, the “concentrated liquid” on the side where more microorganisms to be processed are present is led to the underflow pipe, and the “non-concentrated liquid” excluding the concentrated liquid is Led to the overflow line.

  Hereinafter, in this specification, the conduit through which the “concentrated liquid” is guided is referred to as a first liquid supply path 41, and the conduit through which the “non-concentrated liquid” is guided is referred to as a second liquid supply path 42. Both the first liquid supply path 41 and the second liquid supply path 42 are piped so as to constitute the circulating portion 40 that joins the primary side pipe 7, and the non-concentrated liquid and the inactivated concentrated liquid circulate. It returns to the circuit 1.

In the circulating fluid management apparatus 10 of the first embodiment, an ultraviolet irradiator 30 is attached to the middle portion of the first liquid feeding path 41. The ultraviolet irradiator 30 is an inactivation processing unit that inactivates microorganisms in the concentrated liquid, and includes one or a plurality of deep ultraviolet LEDs 31 that irradiate deep ultraviolet rays.
The ultraviolet irradiator 30 of the first embodiment is arranged at the lower part of the classifier 20, and a plurality of deep ultraviolet LEDs 31 are arranged so as to surround the first liquid feeding path 41 and along the first liquid feeding path 41. Yes. In addition, as for the 1st liquid supply path 41, the location in which the ultraviolet irradiator 30 is installed is formed of a material having high ultraviolet transparency such as quartz glass.
The deep ultraviolet LED 31 is a deep ultraviolet LED that efficiently emits UV-C having a wavelength with a high inactivation effect (for example, around 265 nm). As a result, the concentrated concentrate of the cutting oil classified in the cyclone portion is inactivated by irradiation with deep ultraviolet rays when passing through the position of the first liquid supply passage 41 facing the deep ultraviolet LED 31.

Next, the effect of the circulating fluid management apparatus 10 of the first embodiment and the circulating fluid management method using the same will be described.
As described above, the facility 2 of the first embodiment is a machine tool facility, and the cutting oil is supplied to the facility 2 from the primary side pipe 7 of the circulation circuit 1. The cutting oil is used for lubrication and cooling when performing metal processing such as cutting and grinding in the equipment 2. Thereafter, the cutting oil is returned from the secondary side pipe line 8 into the circulation circuit 1 and reused.

  Here, when this type of water-soluble cutting oil is used in a circulating manner, microorganisms such as bacteria propagate due to heat generated during machining in machine tool equipment and heat accompanying an increase in the outside air temperature, and a strange odor is generated. There is a case. Such off-flavors can worsen the work environment. Therefore, the facility 2 of the first embodiment manages the circulating fluid by the circulating fluid management device 10 provided in the circulation circuit 1, and maintains the total amount of the fluid that is circulated and used in the facility as much as possible, while maintaining the ultraviolet rays of the fluid. Even when the transmittance is low, the microorganisms mixed in the liquid phase are efficiently irradiated with ultraviolet rays to improve the inactivation rate of the microorganisms.

  That is, in the first embodiment, when the first pump 5 is driven in the circulation circuit 1, the cutting oil introduced into the classifier 20 on the discharge side of the first pump 5 is a concentrated liquid containing microorganisms and the concentrated liquid. Is classified by centrifugation into a non-concentrated liquid from which cutting oil has been removed (classification step). Next, the concentrated liquid is introduced into the first liquid supply path 41. Since the first liquid supply path 41 is provided with an ultraviolet irradiator 30 that can inactivate microorganisms in the concentrated liquid, classification is performed. Only the concentrated liquid classified in the classification process by the machine 20 can be irradiated with deep ultraviolet rays to inactivate microorganisms in the concentrated liquid (inactivation processing process). And as above-mentioned, since both the 1st liquid supply path 41 and the 2nd liquid supply path 42 comprise the reflux part 40 which merges with the primary side pipe line 7, the concentration after a non-concentrated liquid and an inactivation process The liquid is returned to the circulation circuit 1 (circulation process).

  Thus, according to the circulating fluid management apparatus 10 of the first embodiment and the circulating fluid management method using the same, the cutting oil used in the circulating circuit 1 of the equipment 2 can be classified by centrifugation by the classifier 20. . And only the concentrated liquid containing the microorganisms classified by the classifier 20 can be inactivated by irradiating deep ultraviolet rays with the ultraviolet irradiator 30. Therefore, the non-concentrated liquid can be excluded from the ultraviolet irradiation target as compared with the technique in which the entire amount of the cutting oil used in the facility is the target of the ultraviolet irradiation. Therefore, even when the ultraviolet transmittance of the cutting oil is low, it is possible to efficiently irradiate the microorganisms mixed in the liquid phase with deep ultraviolet rays with high energy efficiency. And according to this circulating fluid management device 10, since the non-concentrated liquid and the concentrated liquid after the inactivation treatment are returned to the circulation circuit 1 by the circulating portion 40, the total amount of cutting oil circulated and used in the facility 2 is reduced. It can be maintained as much as possible.

[Second Embodiment]
Next, a second embodiment will be described with reference to FIG. The example of 2nd embodiment adds the example of a suitable structure when applying to machine tool equipment with respect to 1st embodiment. Therefore, hereinafter, a configuration example added to the first embodiment and the operation effect associated therewith will be described. The components corresponding to the first embodiment are denoted by the same reference numerals and the description thereof will be omitted as appropriate.

  As shown in FIG. 2, the circulation circuit 1 according to the second embodiment is used in the first storage tank 3 that stores the cutting oil used in the facility 2 on the upstream side of the facility 2, the facility 2, and the facility 2. The second storage tank 4 that stores the cutting oil on the downstream side of the facility 2 is circulated in this order. In addition, the whole system of 2nd embodiment is controlled by the control part (for example, computer for management) not shown.

  The secondary side pipe line 8 of the circulation circuit 1 communicates with the second storage tank 4 and is piped so as to supply the cutting oil in the facility 2 to the second storage tank 4. Further, the primary side pipe line 7 is piped so as to supply cutting oil from the first storage tank 3 into the facility 2. In the second storage tank 4, for example, a cyclone type filtration device is built in, and sludge and processing soot contained in the used cutting oil are quickly settled in the tank, and the waste liquid containing the sludge and processing soot is disposed of as waste. It can be separated and accumulated in the tank 9. The cutting oil filtered in the second storage tank 4 is sent from the second storage tank 4 toward the first storage tank 3 by driving the first pump 5.

  The first storage tank 3 and the second storage tank 4 are provided with a liquid level detector (not shown) that detects the amount of oil in the tank. A liquid level detector detects the height of the liquid level of the cutting oil stored in each tank, and transmits a signal indicating the height to the control unit. A second pump 6 for pumping liquid and a pressure sensor (not shown) are provided in the middle of the primary side pipe line 7. The pressure sensor measures the pressure of the primary side pipe line 7 at any time, and the control unit monitors the measurement pressure and drives the second pump 6 so as to maintain the appropriate pressure. The supply state of the cutting oil delivered into the facility 2 is stably controlled.

  Further, the control unit detects the liquid level height of each storage tank 3 and 4 from the signal of the liquid level detector of each storage tank 3 and 4, and the two pumps so that the liquid level maintains a predetermined height. 5 and 6 are driven, and the cutting oil in the second storage tank 4 is appropriately supplied to the first storage tank 3. Moreover, a control part receives the operation signal by the side of the installation 2, and operates the 2nd pump 6 provided in the primary side pipe line 7 appropriately according to the operating condition by the side of the installation 2. On the equipment 2 side, the cutting oil used for lubrication and cooling of the machine tool is led to the secondary reservoir 8 toward the second storage tank 4. Thereby, in 2nd embodiment, cutting oil circulates through the 1st storage tank 3, equipment 2, and the 2nd storage tank 4 stably in this order, and is reused.

  Here, between the 2nd storage tank 4 and the 1st storage tank 3, the circulating fluid management apparatus 10 similar to 1st embodiment is interposed. The circulating fluid management apparatus 10 includes one or a plurality of classifiers 20 equipped with a cyclone unit that classifies the concentrated concentrate of cutting oil, and one or a plurality of ultraviolet irradiators 30. In the second embodiment, one classifier 20 and one ultraviolet irradiator 30 are provided. In the circulation circuit 1 of the second embodiment, the cutting oil filtered in the second storage tank 4 is inactivated through the circulating fluid management device 10 and then stored in the first storage tank 3 and reused. .

  In the circulation circuit 1 of the second embodiment, the control unit drives the first pump 5 as necessary to pump up the cutting oil in the second storage tank 4 and supply it to the cyclone unit of the classifier 20. . The cutting oil supplied to the cyclone section is classified into a concentrated liquid and a non-concentrated liquid by centrifugation. And a control part operates the ultraviolet irradiation device 30 which is an inactivation process part, and irradiates deep ultraviolet rays with respect to the concentrate containing the microorganisms classified by the classification part, and performs an inactivation process. The microorganisms in the cutting oil are inactivated by irradiating the concentrated oil of the cutting oil with deep ultraviolet rays. The inactivated concentrated liquid is stored in the first storage tank 3 from the circulating portion 40. Therefore, the first storage tank 3 stores the cutting oil in which the impurities are removed and the inactivated processing is in a good management state.

  Thus, according to the second embodiment, the circulating fluid management device 10 is interposed between the second storage tank 4 and the first storage tank 3, and the cutting oil filtered in the second storage tank 4 is Then, after being inactivated through the circulating fluid management device 10, it is supplied to the first storage tank 3 and reused. Therefore, according to the second embodiment, in addition to the operational effects of the first embodiment described above, impurities can be removed in the second storage tank 4, and also the circulating fluid management device 10 has the impurities removed. Since oil can be introduced, it is suitable for improving the classification quality in the classification process.

[Third embodiment]
Next, a third embodiment will be described with reference to FIG. The example of a 3rd embodiment shows the example of composition suitable when applying circulating fluid management device 10 to the 2nd embodiment irrespective of the operation situation of facilities. Therefore, the configuration different from that of the second embodiment and the operation effect associated therewith will be described below. The configuration corresponding to the second embodiment is denoted by the same reference numeral and the description thereof is omitted as appropriate.

  The third embodiment is different from the second embodiment in that a first pump 5A and a third pump 5B are provided in place of the first pump 5. In the first pump 5 </ b> A, the discharge side pipe 11 is directly connected to the first storage tank 3. In the third pump 5 </ b> B, the pumping side pipe 12 is connected to the first storage tank 3, and the discharge side pipe 13 is connected to the cyclone portion of the classifier 20.

  According to the third embodiment, the circulating fluid management device 10 is inactivated independently of the cutting oil stored in the first storage tank 3 regardless of the cutting oil circulation state in the circulation circuit 1. Processing can be performed. Therefore, in addition to the effects of the first to second embodiments described above, the inactivation process of the cutting oil stored in the first storage tank 3 can be performed at any time even when the facility 2 is not operating. Therefore, for example, even if the factory is closed for a long time such as summer holidays and winter holidays, it is possible to efficiently irradiate the microorganisms mixed in the liquid phase with ultraviolet rays, which is suitable for improving the inactivation rate of the microorganisms. is there. Here, from the viewpoint of improving heat dissipation, the circulating fluid management device 10 is also preferably disposed in the first storage tank 3.

[Fourth embodiment]
Next, a fourth embodiment will be described with reference to FIG. The example of the fourth embodiment is an example in which a plurality of classifiers and ultraviolet irradiators of the circulating fluid management device 10 are installed in the first embodiment. The fourth embodiment shows an example in which two classifiers and an ultraviolet irradiator are connected in parallel. Note that components corresponding to those in the first embodiment are denoted by the same or corresponding reference numerals, and description thereof is omitted as appropriate.

As shown in FIG. 4, in the fourth embodiment, there are two classifiers 20A and 20B and two ultraviolet irradiators 30A and 30B. As for the 1st pump 5, the discharge side pipe line has branched into two, and each pipe line is connected to the cyclone part of two classifiers 20A and 20B, respectively. Further, the two ultraviolet irradiators 30A and 30B are attached to the middle portions of the first liquid supply passages 41 of the classifiers 20A and 20B, respectively. And each 1st liquid supply path 41 of each classifier 20A, 20B is merged downstream from each ultraviolet irradiation device 30A, 30B, and also each 2nd liquid supply path 42 of each classifier 20A, 20B is also. The recirculation portion 40 is formed by joining at the downstream side, and the cutting oil is returned into the circulation circuit 1.
According to the fourth embodiment, in addition to the effects of the first embodiment described above, a plurality of classifiers and ultraviolet irradiators are connected in parallel, so that the inactivation processing capacity can be increased as the number increases. it can.

[Fifth embodiment]
Next, a fifth embodiment will be described with reference to FIG. The example of the fifth embodiment is an example in which a plurality of classifiers and ultraviolet irradiators are connected in series to the fourth embodiment. The components corresponding to the fourth embodiment are denoted by the same or corresponding reference numerals, and the description thereof is omitted as appropriate.

  As shown in FIG. 5, in the fifth embodiment, two classifiers 20A and 20B and two ultraviolet irradiators 30A and 30B are connected in series. In the fifth embodiment, two pumps 5A and 5B are provided, and the first pump 5A has a discharge side pipe connected to the cyclone portion of the first classifier 20A. The second pump 5B is interposed in the middle of the second liquid supply path 42 from the first classifier 20A.

  Furthermore, the 2nd liquid supply path 42 of the 1st pump 5A is connected to the cyclone part of the 2nd pump 5B. The first ultraviolet irradiator 30A is attached to the first liquid delivery path 41 of the first classifier 20A, and the second ultraviolet irradiator 30B is the first liquid delivery path 41 of the second classifier 20B. Is attached. And each 1st liquid supply path 41 of each classifier 20A, 20B joins downstream from each ultraviolet irradiation device 30A, 30B, and the 2nd liquid supply path 42 of the 2nd classifier 20B and 1st liquid supply. The circulation part 40 is constituted by the path 41, and the cutting oil is returned into the circulation circuit 1.

According to the fifth embodiment, in addition to the effects of the first embodiment described above, since a plurality of classifiers and ultraviolet irradiators are connected in series, a finer inactivation process is executed as the number increases. Preferred above. For example, even if there are multiple types of target microorganisms to be treated and their specific gravity is different, classification according to the specific gravity of the target microorganisms is performed and stepwise suitable for each specific gravity. Can be classified easily.
In the case of the fifth embodiment, the first stage classifier 20A and the first ultraviolet irradiator 30A are used to inactivate the concentrated liquid of the microorganism having the largest specific gravity, Further, the second stage classifier 20B and the second ultraviolet irradiator 30B inactivate the concentrated liquid of the microorganism that is the second processing target having a specific gravity smaller than that of the first processing target. Processing can be executed.

[Sixth embodiment]
Next, a sixth embodiment will be described with reference to FIG. The example of the sixth embodiment is an example in which a plurality of classifiers are connected in series to the first embodiment. In the sixth embodiment, an example is shown in which two classifiers 20A and 20B are connected in series, and one ultraviolet irradiator 30 is provided in the first liquid supply path 41 of the final classifier 20B. Note that components corresponding to those in the first embodiment are denoted by the same or corresponding reference numerals, and description thereof is omitted as appropriate.

  As shown in FIG. 6, in the sixth embodiment, the discharge side pipe line of the first pump 5 is connected to the cyclone portion of the first classifier 20A, and the underflow pipe line 43 of the first classifier 20A is the first one. It is connected to the cyclone section of the two classifier 20B. The overflow pipes of the two classifiers 20A and 20B merge to form a second liquid feeding path 42. The underflow line of the second classifier 20 </ b> B serves as the first liquid supply path 41, and one ultraviolet irradiator 30 is provided in the middle of the first liquid supply path 41.

  According to the sixth embodiment, in addition to the effects of the first embodiment described above, a plurality of classifiers are connected in series, and one ultraviolet irradiator is provided in the first liquid supply path 41 of the final classifier 20B. Since 30 is provided, the concentration of the concentrated liquid containing microorganisms can be further improved as the number of classifiers increases. Therefore, it is suitable for efficiently irradiating the microorganisms mixed in the liquid phase with high energy efficiency.

[Seventh embodiment]
Next, a seventh embodiment will be described with reference to FIG. The example of the seventh embodiment is a configuration example in which the “concentrated liquid” to be processed is opposite to the first embodiment. Here, as described above, the “concentrated liquid” in this specification means a liquid on the side where more microorganisms to be treated exist as a result of classification. That is, when the specific gravity of the microorganism to be processed is heavy with respect to the liquid, the outer peripheral side of the centrifugation is the concentrated liquid, while when the specific gravity of the microorganism to be processed with respect to the liquid is light, the centrifugal separation is performed. The inner peripheral side is a concentrate.

  Therefore, in the seventh embodiment, the liquid that is classified in the cyclone portion of the classifier 20 and that has a low specific gravity led to the overflow pipe is “concentrated liquid”, and therefore, the overflow pipe side is the first liquid feed path 41. The other underflow pipe side is a second liquid feeding path 42. And the ultraviolet irradiation device 30 is provided in the 1st liquid supply path 41, and an inactivation process is performed.

As described above, according to the embodiments of the present invention, since the cutting oil can be irradiated with deep ultraviolet rays after being concentrated, the deep ultraviolet rays reach the microorganisms even if the cutting oil has low permeability. It is possible to reliably inactivate microorganisms inside. Therefore, even if it is a cutting oil with low permeability, an inactivation rate can be improved.
And since the non-concentrated liquid and the concentrated liquid after the inactivation treatment are returned to the circulation circuit by the circulating portion, the ultraviolet ray transmittance of the liquid is low while maintaining the total amount of liquid circulated in the facility as much as possible. Even in this case, the microorganisms mixed in the liquid phase can be efficiently irradiated with ultraviolet rays, and the inactivation rate of the microorganisms can be improved.

The circulating fluid management device according to the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, the configurations of the above embodiments can be combined with each other.
For example, in each of the above-described embodiments, a water-soluble cutting oil is used as an example of a liquid in which microorganisms propagate with use, and a machine tool facility in a machining factory is provided as a facility having a circulation circuit for circulating such liquid. However, the present invention is not limited to this. That is, the circulating fluid management apparatus and the circulating fluid management method according to the present invention can be applied to various equipments provided with a circulation circuit that circulates a fluid in which microorganisms propagate with use. For example, even if the facility is a plant cultivation facility in a plant factory, and the liquid is nutrient water used for growing plants in the plant cultivation facility, the circulating fluid management apparatus and the circulating fluid management method according to the present invention Can be suitably employed.
Further, for example, even when the facility is a pool and the liquid is pool water, the circulating fluid management device and the circulating fluid management method according to the present invention can be suitably employed. Further, for example, even if the facility is a car painting factory and the liquid is water for humidifying the air used for drying the coating liquid, the circulating fluid management apparatus and the circulating fluid management method according to the present invention are suitable. Can be adopted. In this case, it is possible to suppress the growth of algae generated when groundwater is used for humidifying water.

  In addition, for example, when the circulating fluid management device classifiers and ultraviolet irradiators are provided in multiple stages (the fourth and fifth embodiments described above), not only serial connection but also parallel connection, serial connection and parallel connection are not limited. Can be combined as appropriate. Further, the object to be “concentrated liquid” may be an appropriate combination of the outer peripheral side and the inner peripheral side of the centrifugal separation, and can be constituted by a combination of the overflow line side and the underflow line side.

  For example, in the first-stage circulating fluid management device, a liquid containing microorganisms having a heavier specific gravity than the liquid is introduced into the first liquid supply path as a concentrate and inactivated, and then in the second-stage circulating fluid management device. The liquid containing a microorganism having a lighter specific gravity than the liquid can be introduced into the first liquid feeding path as a concentrated liquid to perform inactivation treatment.

1 Circulating circuit 2 Equipment 3 First storage tank (storage tank)
4 Second storage tank (storage tank)
5 First pump (pump)
6 Second pump 7 Primary side pipe 8 Secondary side pipe 9 Waste tank 10 Circulating fluid management device 20 Classifier (classification section)
30 UV irradiator (deactivation processing part)
31 Deep UV LED
40 Recirculation part 41 1st liquid supply path 42 2nd liquid supply path

Claims (11)

A circulating fluid management device used in equipment equipped with a circulation circuit that circulates a fluid in which microorganisms propagate with use,
A classifying unit that divides a concentrated liquid obtained by centrifuging microorganisms in the liquid circulating through the circulation circuit into a non-concentrated liquid obtained by removing the concentrated liquid from the liquid;
An inactivation treatment unit that inactivates microorganisms in the concentrate by irradiating the concentrated solution classified by the classification unit with ultraviolet rays;
A reflux section for returning the non-concentrated liquid and the inactivated concentrated liquid into the circulation circuit;
A circulating fluid management device comprising: The circulation circuit includes a storage tank for storing a liquid used in the facility,
The classifying unit has a classifier that centrifuges the liquid introduced from the storage tank,
The recirculation unit is configured to supply a first liquid supply path for supplying the concentrated liquid classified by the classifier to the storage tank, and a first liquid supply path for supplying the non-concentrated liquid classified by the classifier to the storage tank. Having two liquid feeding paths,
The circulating fluid management according to claim 1, wherein the inactivation processing unit includes an ultraviolet irradiator that is provided in an intermediate portion of the first liquid supply path and inactivates microorganisms in the concentrate by irradiation with deep ultraviolet rays. apparatus. The circulation circuit includes a first storage tank that stores the liquid used in the equipment on the upstream side of the equipment, the second storage tank that stores the liquid used in the equipment and the equipment on the downstream side of the equipment. And circulate in this order,
The classifier is provided to centrifuge the liquid introduced from the second storage tank,
The first liquid feeding path is piped so as to feed the concentrated liquid classified by the classifier to the first storage tank, and the second liquid feeding path is the non-classified by the classifier. Piped to send the concentrate to the first reservoir,
The circulating fluid management device according to claim 2, wherein the ultraviolet irradiator is provided in an intermediate portion of the first liquid feeding path so as to inactivate microorganisms in the concentrated liquid by irradiation with deep ultraviolet rays. The circulation circuit includes a first storage tank that stores the liquid used in the equipment on the upstream side of the equipment, the second storage tank that stores the liquid used in the equipment and the equipment on the downstream side of the equipment. And circulate in this order,
The classifier is provided to centrifuge the liquid introduced from the first storage tank,
The first liquid feeding path is piped so as to return the concentrated liquid classified by the classifier to the first storage tank, and the second liquid feeding path is the non-concentrated liquid classified by the classifier. Is piped back to the first storage tank,
The circulating fluid management device according to claim 2, wherein the ultraviolet irradiator is provided in an intermediate portion of the first liquid feeding path so as to inactivate microorganisms in the concentrated liquid by irradiation with deep ultraviolet rays.   The circulating fluid management device according to any one of claims 2 to 4, wherein the ultraviolet irradiator irradiates UV-C using a deep ultraviolet LED. The facility is a machine tool facility of a machining factory,
The circulating fluid management device according to any one of claims 2 to 5, wherein the fluid is a cutting oil used in the machine tool facility. The facility is a plant cultivation facility of a plant factory,
The circulating fluid management device according to any one of claims 2 to 5, wherein the liquid is nutrient water used for cultivating a plant in the plant cultivation facility.   The said classifier is provided with two or more units | sets in parallel, The said ultraviolet irradiation device is each attached to the middle part of the 1st liquid supply path of each classifier, Each of the classifiers as described in any one of Claims 2-7. Circulating fluid management device.   The classifier is provided with a plurality of units in series, and the ultraviolet irradiator is attached to the middle part of the first liquid feeding path of each classifier, respectively. Circulating fluid management device.   A plurality of the classifiers are provided in series or in parallel, and the ultraviolet irradiator is attached to an intermediate portion of the first liquid supply path of the classifier disposed in the final stage. The circulating fluid management device according to claim 1. A method of managing a liquid that is circulated and used in equipment and in which microorganisms propagate along with the use,
A step of classifying the liquid by centrifugation into a concentrated liquid containing microorganisms and a non-concentrated liquid obtained by removing the concentrated liquid from the liquid;
An inactivation treatment step of inactivating microorganisms in the concentrate by irradiating deep ultraviolet rays only to the concentrate classified in the classification step;
A reflux step for returning the non-concentrated liquid and the concentrated liquid after the inactivation treatment to the liquid;
A method for managing circulating fluid, comprising:

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