JP2007143822A - Pure water making apparatus and hot-water disinfection method for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pure water making apparatus for the production of beverage and foods which achieves more economical and stable operation by having the function of efficiently carrying out hot-water disinfection of water paths of the pure water making device as a whole. <P>SOLUTION: The pure water making apparatus 20 which makes pure water used for the production of the beverage and foods from raw water is provided with a water treatment unit 30 and a hot water supply unit 50. The water treatment unit 30 has a plurality of water treatment equipment for removing impure substances contained in the raw water and a plurality of hot-water disinfection paths which divide the water paths containing those of the water treatment equipment of the water treatment unit for hot-water disinfection. The hot water supply unit 50 is provided with a water heater 51 for heating the water for hot-water disinfection, a plurality of water selector valves 54-1 to 54-3 for hot-water disinfection which are used for supplying the water for hot water disinfection of different qualities to the water heater 51 and hot-water supply piping 53 for supplying the hot water to the plurality of hot-water disinfection paths from the water heater 51. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an apparatus for producing pure water and the like, and more particularly to an apparatus particularly suitable for producing pure water used for raw water, processed water and the like in a beverage / food production process.

  In the manufacturing process of beverages and foods, “drinkable water” stipulated by the Food Sanitation Law is generally used. However, as raw material water and processed water for beverages and foods, ion-exchange treatment or reverse processing is applied to potable water. Water that has been subjected to osmotic membrane treatment or the like to remove impurities in water, so-called pure water, is often used.

  As an advantage of using pure water, firstly, since pure water does not contain an ionic component or the like that changes the flavor or properties of beverages and foods, there is a point that high quality beverages and foods can be produced. In addition, even if there is a fluctuation in raw water quality, the quality of pure water can be kept constant by appropriately operating and managing the pure water production apparatus, so that it is also advantageous that the influence on the quality of beverages and foods can be avoided. Furthermore, even if multiple factories are located in different areas and the raw water quality is significantly different, pure water with a certain level of water quality can be produced and supplied by configuring a pure water production system by appropriately combining water treatment equipment according to the raw water quality. It is possible to produce beverages and foods of the same quality with stability at any factory.

  Here, in general, the source of pure water for beverage / food production is tap water, well water or industrial water. Of these, clean water can be supplied to the pure water production apparatus as it is, but well water and industrial water require pretreatment. For example, when well water contains iron and manganese, sodium hypochlorite (NaClO) is added as a sterilizing agent and oxidizing agent, and iron and manganese are removed by an iron removal / manganese removal apparatus. For industrial water, NaClO is added as a bactericide, and polyaluminum chloride is added as a flocculant, and then suspended substances are removed with a sand filter or a fiber filter. All of these waters are supplied to the pure water production apparatus in a state containing residual chlorine in order to prevent bacterial growth.

  The pure water production apparatus is configured by combining a plurality of water treatment devices in consideration of raw water quality, treated water quality, treated water amount, economic efficiency, and the like. For example, the deionized water production equipment is the NO.1 activated carbon tower that removes residual chlorine in raw water, the two-bed, three-column ion exchange device (cation exchange tower, air stripping tower, anion exchange tower) that performs desalting, ion exchange A bactericide injection device for injecting sodium hypochlorite into the water desalted by the device, a desalting water tank for storing the treated water of the ion exchange device, a NO.2 activated carbon tower for removing residual chlorine in the desalting water outlet water, It consists of a cartridge filter that removes a trace amount of suspended matter, and an ultraviolet sterilizer that sterilizes the cartridge filter treated water.

  In the above-described configuration example of the water treatment equipment of the pure water production apparatus, a reducing agent injection unit such as sodium sulfite can be used instead of the NO.1 activated carbon tower and the NO.2 activated carbon tower. The activated carbon tower is often used because of its function. Further, a membrane deaerator can be used in place of the air stripping tower. Further, as the desalting apparatus, instead of the two-bed / three-column type ion exchange apparatus, a mixed bed type ion exchange apparatus, a reverse osmosis membrane module unit, a nanofiltration membrane module unit, an electric regeneration type desalination apparatus, or the like may be used. it can.

  In such a pure water production apparatus, except for a desalted water tank for storing demineralized water injected with a bactericidal agent and an ultraviolet sterilizer, in order to perform water treatment without residual chlorine, water treatment equipment and these Bacteria are likely to propagate in the pipes connecting the devices, so this must be prevented.

For example, Patent Document 1 and Patent Document 2 are known as conventional techniques for preventing the growth of bacteria in an activated carbon tower or an ion exchange tower. In these techniques, the activated carbon tower and the ion exchange tower are respectively sterilized by passing hot water through the activated carbon tower and the ion exchange tower.
Moreover, with the technique described in patent document 3, portable water (tap water) is heated with a heater, and hot water sterilization is performed through the hot water through the entire water passage. This water flow path forms a system for producing a sterile aqueous solution configured by combining a prefilter, an adsorbing element, a reverse osmosis unit, and an ion exchange module.
Furthermore, in the technique described in Patent Document 4, a deionized water production path comprising a coagulation turbidity removal device, a filtration device, a filtrate water tank, a mixed bed type pure water device, a precision filtration device, an ultraviolet sterilization device, and a pure water tank In this case, a heat exchange device is provided in the pure water pipe connected to the pure water tank, and one end of the heated pure water pipe is connected to the heat exchange device, and the other end is connected to an arbitrary portion of the pure water production path. Hot water sterilization of the water production route is performed.

JP-A-6-71249 JP 2003-88765 A Japanese Patent Laid-Open No. 7-8996 JP 54-34545 A

  According to the techniques described in Patent Literature 1 and Patent Literature 2 described above, the activated carbon tower and the ion exchange tower can be sterilized by passing hot water through the activated carbon tower and the ion exchange tower, respectively. However, with these techniques, although the activated carbon tower and the ion exchange tower can be individually sterilized with hot water, they cannot be sterilized with hot water over the entire water flow path configured by combining these water treatment devices.

On the other hand, as in the technique described in Patent Document 3, a system in which hot water is passed through the entire water passage is suitable for a sterile water production apparatus in which raw water is clean tap water and the apparatus scale is small. However, several problems arise when this technology is applied to a device for producing pure water for beverage and food production, which has a relatively large scale of several tens to 100 m ³ / h. First, since hot water is allowed to pass through the entire water passage, there is a risk that contaminants accumulated in the upstream water treatment equipment may be detached and enter the hot water, contaminating the downstream water treatment equipment. In addition, since the equipment scale is large, it takes a long time to raise the temperature until the most downstream water treatment equipment reaches the predetermined hot water sterilization temperature and lower the temperature to the original temperature. End up. As a result, hot water sterilization requires a large amount of heat energy and a large amount of water, which is not economical.

  Further, as in the technique described in Patent Document 4, a heat exchange device is provided in a pure water pipe connected to a pure water tank, and one end of the heated pure water pipe is connected to the heat exchange device, and the other end is connected to pure water. When the hot water sterilization of the pure water production path is performed by connecting to an arbitrary part of the production path, since all the hot water sterilization water is pure water, the amount of pure water used is large and it is also not economical. Furthermore, when performing the hot water sterilization of the pure water production apparatus by the technique described in Patent Document 4, especially when the heated pure water pipe is connected to the water treatment equipment on the upstream side of the pure water production apparatus to perform the circulation sterilization. Has the same problem as the problem of the technique of Patent Document 3 described above. Furthermore, in the technique described in Patent Document 4, no examination is made on the treatment of drainage after hot water sterilization. As a result, it is difficult to deal with various problems related to drainage after hot water sterilization, such as wastewater recovery problems and requests for effective use of heat.

  As described above, the conventional apparatus for producing pure water for beverage / food production has no efficient hot water sterilization function for preventing the propagation of bacteria in the apparatus and performing stable operation of the apparatus. However, from the viewpoint of effective use of water resources and energy saving, for example, further efficiency of hot water sterilization in a device for producing pure water for beverage / food production is required.

  The present invention has been made in order to solve the technical problems as described above, and an object of the present invention is to efficiently perform hot water sterilization on the entire water passage of the pure water production apparatus. By providing the function, an object is to provide a device for producing pure water for beverage / food production, which can be operated more economically and more stably.

  For this purpose, the present invention is a pure water production apparatus for producing pure water used for the production of beverages or foods from raw water, comprising a water treatment unit and a hot water supply unit, the water treatment unit comprising: A plurality of water treatment equipment for removing impurities contained in the raw water and a plurality of hot water sterilization paths for dividing the water flow path including the water treatment equipment of the water treatment unit into hot water sterilization. The hot water supply unit includes a water heating device for heating the hot water sterilization water, a plurality of hot water sterilization water supply pipes for supplying hot water sterilization water of different water quality to the water heating device, And hot water supply piping for supplying hot water from the water heating device to the plurality of hot water sterilization paths.

Here, each of the plurality of hot water sterilization paths of the water treatment unit may include a hot water inlet valve and a hot water outlet valve.
Further, the water heating device of the hot water supply unit heats hot water sterilization water for performing one-time hot water sterilization of water treatment equipment, and supplies water for hot water sterilization in any of a plurality of hot water sterilization water supply pipes. It is possible to supply hot water sterilization water having a specific water quality to the water heating device from the pipe.
Furthermore, the hot water supply unit includes a hot water tank, a hot water pump, a water heating device, and a plurality of hot water sterilization waters for supplying hot water sterilization water to the hot water tank. It is preferable that hot water can be reused if the supply pipe is provided.

Furthermore, the hot water supply unit may be characterized in that the hot water supply pipe is provided with a bubble separator and a gas discharge valve for removing bubbles in the hot water from the hot water.
Further, an operation panel for selecting a path for performing hot water sterilization from the plurality of hot water sterilization paths is further included.
Here, hot water sterilization can be performed at different frequencies for the plurality of hot water sterilization paths.
Further, the plurality of hot water sterilization paths include a transient hot water sterilization path and a circulating hot water sterilization path, and any one of these is selected to perform hot water sterilization. it can.

  From another viewpoint, the pure water production apparatus of the present invention includes a water treatment unit and a hot water supply unit, and the water treatment unit includes a plurality of water treatment devices for removing impurities contained in the raw water. , A plurality of hot water sterilization paths for dividing the water flow path including the water treatment equipment of this water treatment unit and sterilizing with hot water, and the hot water supply unit is for heating the water for hot water sterilization A water heating apparatus, a hot water sterilization water supply pipe for supplying hot water sterilization water to the water heating apparatus, and a hot water supply pipe for supplying hot water from the water heating apparatus to a plurality of hot water sterilization paths In order to discharge the water after sterilizing the water treatment device with hot water to the outside, it may be characterized by including a drain pipe provided separately from the water passage of the water treatment unit.

  On the other hand, the present invention provides pure water production for producing pure water used in the production of beverages or foods, using raw water as water consisting of at least one of water containing residual chlorine, which is water, well water, and industrial water. A hot water sterilization method for an apparatus, wherein the pure water production apparatus is divided into one or a plurality of water treatment equipment units, and each divided unit has different water quality and / or different frequency. It may be characterized by performing sterilization.

Here, the hot water sterilization may be performed by a transient hot water sterilization in which hot water is not reused or a circulating hot water sterilization in which hot water is reused.
In addition, this hot water sterilization can be characterized in that hot water is circulated in each divided unit by selecting the same direction or reverse direction as the flow of pure water.
Further, the hot water sterilization is characterized in that the hot water used for the hot water sterilization is discharged out of the apparatus by using a drainage path provided separately from the path used for passing pure water. be able to.

  According to the present invention, it is possible to provide an apparatus for producing pure water that enables efficient hot water sterilization as compared with the conventional apparatus and can perform stable operation.

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
Fig.1 (a)-(c) is the figure which showed the example of the pure water system | strain of the drink and food factory to which this Embodiment is applied. The pure water system of the beverage / food factory shown in FIGS. 1A to 1C includes a pure water production apparatus 20 to which the present embodiment is applied before the beverage / food production process 10. . In the pure water system shown in FIG. 1A, clean water is used as a water source, and this clean water is supplied as it is to the pure water production apparatus 20 as raw water. And the treated water of this pure water manufacturing apparatus 20 is supplied to the drink / food manufacturing process 10. FIG. On the other hand, in the pure water system shown in FIG. 1 (b), well water is used as a water source, NaClO is added to the well water, and water treated by the iron removal / manganese removal apparatus 11 is supplied to the pure water production apparatus 20 as raw water. is doing. Further, in the pure water system shown in FIG. 1 (c), industrial water is used as a water source, NaClO and a flocculant are added to this industrial water, and the water treated by the filter 12 is supplied to the pure water production apparatus 20 as raw water. is doing.
Here, the flow rate of one pure water production apparatus is about several tens to 100 m ³ / h. Moreover, when the scale of a beverage / food factory is large, a plurality of series of pure water production apparatuses 20 are installed.
Hereinafter, the pure water manufacturing apparatus 20 is demonstrated in 1st Embodiment-4th Embodiment.

-First embodiment-
FIG. 2 is a configuration diagram detailing the first embodiment of the pure water production apparatus 20. The pure water production apparatus 20 to which Embodiment 1 is applied includes a water treatment unit 30 to which a plurality of water treatment devices for treating raw water are connected via a water passage, and a water treatment that constitutes the water treatment unit 30. And a hot water supply unit 50 for sterilizing the equipment with hot water. The hot water supply unit 50 supplies hot water to the water treatment unit 30 through a plurality of hot water sterilization paths for dividing the water treatment unit 30 into one or a plurality of water treatment devices and sterilizing the hot water. is doing. The hot water supply unit 50 is supplied with hot water sterilizing water of different water quality.

  The water treatment unit 30 includes a NO. 1 activated carbon tower 31 that removes residual chlorine in raw water as a pure water production apparatus. In addition, a cation exchange tower 32, an air stripping tower 33, and an anion exchange tower 34 are provided as a two-bed / three-column ion exchange apparatus for performing desalting. Further, a bactericide injection device 39 for injecting sodium hypochlorite (NaClO) into the water desalted by the ion exchange device (cation exchange tower 32, air stripping tower 33, anion exchange tower 34) is provided. Further, a demineralized water tank 35 for storing treated water of the ion exchange device and a NO. 2 activated carbon tower 36 for removing residual chlorine in the outlet water of the demineralized water tank 35 are provided. Furthermore, a cartridge filter 37 that removes a trace amount of suspended substances and an ultraviolet sterilizer 38 that sterilizes treated water from the cartridge filter 37 are provided.

The cation exchange column 32 which is this ion exchange device is filled with a cation exchange resin for removing a cationic substance. The anion exchange tower 34 is filled with an anion exchange resin for removing an anionic substance.
In addition, it is preferable to select an appropriate model for the ion exchange apparatus included as the water treatment device of the water treatment unit according to the quality of raw water and the treatment flow rate. According to the example shown in FIG. 2, by disposing an air stripping tower 33 that is a deaeration tower between the cation exchange tower 32 and the anion exchange tower 34, carbon dioxide gas generated from bicarbonate ions in the cation exchange tower 32. This is preferable in that it can be removed and the load on the anion exchange resin in the anion exchange column 34 can be reduced. The air stripping tower 33 has a simple structure and is compact, and is excellent in economic efficiency when used as a deaeration unit. As the degassing unit, a membrane degassing module unit can be used instead of the air stripping tower 33. In the membrane degassing module unit, a gas phase portion and a liquid phase portion are configured via a hydrophobic gas permeable membrane. And if this structure is employ | adopted, since a gas phase part can be depressurized and deaerated, it is preferable at the point which does not have a possibility of mixing of the odor component etc. to the treated water from external air.

Further, the pure water production apparatus 20 is a small amount of suspension contained in the treated water of the ion exchange apparatus as a water treatment device of the water treatment unit 30 including an ion exchange apparatus (cation exchange tower 32, anion exchange tower 34, etc.). A cartridge filter 37 for removing the substance is provided. For the water treatment unit 30 that does not include the reverse osmosis membrane module unit or the nanofiltration membrane module unit, it is particularly preferable that the cartridge filter 37 is provided because suspended substances contained in the ion exchange tower treated water can be removed.
Furthermore, the pure water production apparatus 20 includes an ultraviolet sterilizer 38 for sterilizing bacteria in the water, and by providing the ultraviolet sterilizer 38, it is possible to suppress bacterial growth in the treated water.

  A plurality of such water treatment devices are connected via a water passage, and the treated water is supplied to the beverage / food manufacturing process 10. And this several water treatment apparatus has the several hot water sterilization path | route for dividing | segmenting the whole water flow path | route including the water treatment apparatus of the water treatment unit 30, and carrying out a hot water sterilization separately by a division | segmentation unit. . Each of these hot water sterilization paths includes hot water inlet valves 41-1 to 41-5 and hot water outlet valves 42-1 to 42-6, respectively. Further, a hot water sterilization water drain pipe 43 for discharging the hot water sterilization water used for sterilization out of the apparatus is provided.

  In the example shown in FIG. 2, a first hot water inlet valve 41-1 is provided between the NO.1 activated carbon tower 31 and the cation exchange tower 32, and between the cation exchange tower 32 and the air stripping tower 33. A second hot water inlet valve 41-2 is provided. Further, a third hot water inlet valve 41-3 is provided between the anion exchange tower 34 and the desalted water tank 35. Furthermore, a fourth hot water inlet valve 41-4 is provided between the desalted water tank 35 and the NO. 2 activated carbon tower 36, and a fifth hot water is provided between the NO. 2 activated carbon tower 36 and the cartridge filter 37. An inlet valve 41-5 is provided.

Further, in the example shown in FIG. 2, a first hot water outlet valve 42-1 is provided on the upstream side of the water flow path of the NO.1 activated carbon tower 31, and between the NO.1 activated carbon tower 31 and the cation exchange tower 32 is provided. Thus, the second hot water outlet valve 42-2 is provided upstream of the first hot water inlet valve 41-1 in the water passage. In addition, a third hot water outlet valve 42-3 is provided between the air stripping tower 33 and the anion exchange tower 34, and a third hot water inlet valve is provided between the anion exchange tower 34 and the desalted water tank 35. A fourth hot water outlet valve 42-4 is provided upstream of the water passage 41-3. Further, a fifth hot water outlet valve 42-5 is provided between the demineralized water tank 35 and the NO. 2 activated carbon tower 36 and upstream of the water flow path of the fourth hot water inlet valve 41-4. A sixth hot water outlet valve 42-6 is provided on the downstream side of the water passage of the sterilizer 38.
Hot water that has passed through the first to sixth hot water outlet valves (42-1 to 42-6) is discharged out of the apparatus via the hot water sterilization water drain pipe 43.

  In the pure water production apparatus 20 shown in FIG. 2, hot water inlet valves 41-1 to 41-5, hot water outlet valves 42-1 to 42-6, and hot water sterilization water switching valves 54-1 to 54 described later. A plurality of hot water sterilization paths are formed by -3 or the like. In the example shown in FIG. 2, seven types of paths (1) to (7) are shown as the hot water sterilization paths. The selection of which hot water sterilization path to sterilize among a plurality of hot water sterilization paths is performed by an operation panel (not shown) of the pure water production apparatus 20, and the hot water sterilization operation of each hot water sterilization path is performed. Automatic operation is preferred. The method of selecting the hot water sterilization route is to measure the number of general bacteria in each hot water sterilization route and select the route in which the number of bacteria has increased close to the reference value (for example, the number of general bacteria less than 100 / ml), etc. Can be considered. Moreover, the method of determining periodically the frequency of the hot water sterilization which does not exceed a reference value based on this measurement result, and performing regularly is also considered. In general, the frequency of hot water sterilization is preferably increased when sterilizing a portion having a large number of bacteria, and the frequency of hot water sterilization can be decreased when a portion having a small number of bacteria is sterilized. Thus, it is preferable to perform hot water sterilization at a different frequency for each unit subjected to hot water sterilization.

Each hot water sterilization path of the water treatment unit 30 includes a hot water inlet valve and a hot water outlet valve, respectively, but hot water sterilization is not performed on the entire water flow path including the water treatment device of the water treatment unit 30. It arrange | positions so that a part may not arise and it becomes possible to perform hot water sterilization reliably with respect to the whole water flow path. For example, in the example shown in FIG. 2, as described above, the second hot water outlet valve 42-2 is provided upstream of the first hot water inlet valve 41-1 in the water flow path. The water sterilization route (1) and the hot water sterilization route (2) overlap in part of the water passage. Thereby, hot water sterilization can be performed on the entire water passage.
In addition, each water treatment device of the water treatment unit 30, piping of the water flow system, valves attached to the piping, instruments, and the like are used that have high heat resistance that can withstand high temperatures during hot water sterilization.

  On the other hand, the hot water supply unit 50 constituting the pure water production apparatus 20 shown in FIG. 2 is a water heating device 51 for heating the hot water sterilization water, and for supplying the hot water sterilization water to the water heating device 51. A hot water sterilization water supply pipe 52 and a hot water supply pipe 53 for supplying hot water from the water heating device 51 to each hot water sterilization path are included. In the hot water supply unit 50 shown in FIG. 2, the hot water sterilization of the water treatment equipment is performed by these configurations, and the contaminants detached from the water treatment equipment are not returned to these water treatment equipment. It is configured.

  Moreover, the hot water supply unit 50 uses hot water sterilization water switching valves 54-1 to 54-3 for sterilization with hot water having water quality suitable for each hot water sterilization path. It is attached to the water supply pipe 52. More specifically, a first hot water sterilization water switching valve 54-1 for supplying raw water, a second hot water sterilization water switching valve 54-2 for supplying cation tower treated water, and anion tower treatment A third hot water sterilization water switching valve 54-3 for supplying water is provided. And these switching valves are switched and controlled according to the path | route which performs hot-water sterilization, and the hot-water sterilization water supplied can be selected. Accordingly, for example, it is not necessary to use the treated water for the hot water sterilization of all the hot water sterilization paths, so that the treated water can be saved.

The water heating device 51 included in the hot water supply unit 50 may be of any type as long as it can heat the hot water for sterilization to a predetermined temperature, but is compact if it is a heat exchanger using steam as a heat source. It is preferable in that it is easy to adjust the temperature and is economical. That is, as shown in FIG. 2, steam is supplied to the water heating device 51, and the hot water sterilization water supplied via the hot water sterilization water supply pipe 52 is heated by a heat exchanger using steam as a heat source. The condensed water is discharged out of the machine. Here, the water heating device 51 heats the supplied hot water sterilization water to, for example, about 60 to 90 ° C. It is also effective to change the heating temperature for each hot water sterilization path.
Further, for example, a bubble separator (not shown) and a gas discharge valve (not shown) for separating and removing bubbles in the hot water from the hot water can be attached to the hot water sterilization water supply pipe 52. It is. By attaching these, bubbles can be prevented from staying in the hot water sterilization path, and hot water sterilization can be performed more effectively.
Furthermore, as the means for supplying high-temperature water, other equipment, for example, an anion exchange tower heating regeneration facility (a regenerant heating facility for silica desorption) can be used.

表１は、図２に示す純水製造装置２０の熱水殺菌の実施例を示している。表１に示す熱水殺菌経路(１)〜(７)は、図２に示す符号(１)〜(７)に対応している。
各熱水殺菌経路に共通する熱水殺菌条件としては、
・昇温速度 ０.５〜１０℃/ｍｉｎ
・殺菌 ６０〜９０℃で６０〜１０ｍｉｎ
・降温速度 ０.５〜１０℃/ｍｉｎ
である。 Next, the hot water sterilization path in the first embodiment shown in FIG. 2 will be described.

Table 1 shows an example of hot water sterilization of the pure water production apparatus 20 shown in FIG. The hot water sterilization paths (1) to (7) shown in Table 1 correspond to the codes (1) to (7) shown in FIG.
As hot water sterilization conditions common to each hot water sterilization route,
・ Temperature increase rate 0.5-10 ° C / min
・ Sterilization 60 ~ 90min at 60 ~ 90 ° C
・ Cooling rate 0.5-10 ° C / min
It is.

  In the hot water sterilization path (1), raw water is supplied from the first hot water sterilization water switching valve 54-1 to the water heating device 51 via the hot water sterilization water supply pipe 52. And the hot water produced | generated by heating with this water heating apparatus 51 passes the hot water supply piping 53, and it is NO.1 activated carbon tower 31 from the 1st hot water inlet valve 41-1 of the water treatment unit 30. And a water passage between the cation exchange tower 32 and the water. This hot water flows in the direction opposite to the flow (water flow) of wastewater treatment, and sterilizes the NO. 1 activated carbon tower 31 with hot water. Thereafter, the hot water subjected to the hot water sterilization is drained from the first hot water outlet valve 42-1 via the hot water sterilization water drain pipe 43. Thus, the hot water sterilization route (1) sterilizes the NO. 1 activated carbon tower 31, the sterilization method is transient, and the hot water sterilization water is raw water. Moreover, the hot water flow direction is opposite to the water flow direction. As a result of investigations by the inventors, when compared with the number of general bacteria, the number that was more than 300 / ml before sterilization could be reduced to less than 1 / ml after sterilization.

  Next, in the hot water sterilization path (2), the raw water is similarly supplied from the first hot water sterilization water switching valve 54-1 to the water heating device 51 via the hot water sterilization water supply pipe 52. The hot water heated and generated by the water heating device 51 is supplied to the water flow path from the second hot water inlet valve 41-2 of the water treatment unit 30 via the hot water supply pipe 53. This hot water flows in the opposite direction to the water flow and sterilizes the cation exchange tower 32 with hot water. Thereafter, the hot water subjected to the hot water sterilization is drained from the second hot water outlet valve 42-2 via the hot water sterilization water drain pipe 43. In this way, the hot water sterilization path (2) sterilizes the cation exchange tower 32, the sterilization method is transient, and the hot water sterilization water is raw water. Moreover, the hot water flow direction is opposite to the water flow direction. When compared with the number of general bacteria, what was 20 to 100 / ml before sterilization could be reduced to less than 1 / ml after sterilization.

  Similarly, in the hot water sterilization path (3), raw water is supplied from the first hot water sterilization water switching valve 54-1 to the water heating device 51 via the hot water sterilization water supply pipe 52, and this water heating device. The hot water heated and generated at 51 is supplied from the second hot water inlet valve 41-2 of the water treatment unit 30 to the water flow path via the hot water supply pipe 53. This hot water flows in the same direction as the water flow, and sterilizes the air stripping tower 33 with hot water. Thereafter, the hot water is drained from the third hot water outlet valve 42-3 via the hot water sterilization water drain pipe 43. In this way, the hot water sterilization path (3) sterilizes the air stripping tower 33, the sterilization method is transient, and the hot water sterilization water is raw water. Moreover, the hot water flow direction is the same as the water flow direction. When compared with the number of general bacteria, what was 20 to 100 / ml before sterilization could be reduced to less than 1 / ml after sterilization.

  In the hot water sterilization path (4), the cation tower treated water is supplied from the second hot water sterilization water switching valve 54-2 to the water heating device 51 via the hot water sterilization water supply pipe 52. This cation tower treated water is treated water treated in the cation exchange tower 32 of the water treatment unit 30. In particular, it is preferable to use treated water after the gas is removed by the air stripping tower 33. And the hot water heated and produced | generated by the water heating apparatus 51 is supplied to a water flow path from the 3rd hot water inlet valve 41-3 of the water treatment unit 30 via the hot water supply piping 53. . This hot water flows in the opposite direction to the water flow and sterilizes the anion exchange tower 34 with hot water. Thereafter, the hot water is drained from the third hot water outlet valve 42-3 via the hot water sterilization water drain pipe 43. Thus, the hot water sterilization path (4) sterilizes the anion exchange tower 34, the sterilization system is transient, and the hot water sterilization water is cation tower treated water. Moreover, the hot water flow direction is opposite to the water flow direction. When compared with the number of general bacteria, what was less than 1 / ml to 50 / ml before sterilization could be reduced to less than 1 / ml after sterilization.

  In the hot water sterilization path (5), anion tower treated water is supplied from the third hot water sterilization water switching valve 54-3 to the water heating device 51 via the hot water sterilization water supply pipe 52. This anion tower treated water is preferably treated water after being treated in the anion exchange tower 34 of the water treatment unit 30. And the hot water heated with the water heating apparatus 51 is supplied to a water flow path from the 4th hot water inlet valve 41-4 of the water treatment unit 30 via the hot water supply piping 53. FIG. This hot water flows in the opposite direction to the water flow and sterilizes the desalted water tank 35 with hot water. Thereafter, the hot water is drained from the fourth hot water outlet valve 42-4 via the hot water sterilization water drain pipe 43. Thus, the hot water sterilization path (5) sterilizes the desalted water tank 35, the sterilization method is transient, and the hot water sterilization water is anion tower treated water. Moreover, the hot water flow direction is opposite to the water flow direction. When compared with the number of general bacteria, it was less than 1 / ml to 2 / ml before sterilization and less than 1 / ml after sterilization.

  In the hot water sterilization path (6), anion tower treated water is supplied from the third hot water sterilization water switching valve 54-3 to the water heating device 51 via the hot water sterilization water supply pipe 52. The hot water heated by the water heating device 51 is supplied from the fifth hot water inlet valve 41-5 of the water treatment unit 30 to the water flow path via the hot water supply pipe 53. This hot water flows in the opposite direction to the water flow, and sterilizes the NO. 2 activated carbon tower 36 with hot water. Thereafter, the hot water is drained from the fifth hot water outlet valve 42-5 via the hot water sterilization water drain pipe 43. Thus, the hot water sterilization route (6) sterilizes the NO. 2 activated carbon tower 36, the sterilization method is transient, and the hot water sterilization water is anion tower treated water. Moreover, the hot water flow direction is opposite to the water flow direction. When compared with the number of general bacteria, it was 10 / ml to 20 / ml before sterilization and less than 1 / ml after sterilization.

  In the hot water sterilization path (7), the anion tower treated water is supplied from the third hot water sterilization water switching valve 54-3 to the water heating device 51 via the hot water sterilization water supply pipe 52. The hot water heated by the water heating device 51 is supplied from the fifth hot water inlet valve 41-5 of the water treatment unit 30 to the water flow path via the hot water supply pipe 53. This hot water flows in the same direction as the water flow, and sterilizes both the cartridge filter 37 and the ultraviolet sterilizer 38 with hot water. Thereafter, the hot water is drained from the sixth hot water outlet valve 42-6 via the hot water sterilization water drain pipe 43. In this way, the hot water sterilization path (7) sterilizes the cartridge filter 37 and the ultraviolet sterilizer 38, the sterilization method is transient, and the hot water sterilization water is anion tower treated water. Moreover, the hot water flow direction is the same as the water flow direction. When compared with the number of general bacteria, it was less than 1 / ml to 2 / ml before sterilization and less than 1 / ml after sterilization.

  Thus, according to the present embodiment, the water flow path is covered by the plurality of hot water sterilization paths, so there is no portion in the water flow path that is not hydrothermally sterilized and the entire water flow path is heated. Since each hot water sterilization path becomes shorter than the apparatus used as the sterilization path, the temperature rise / fall time during the hot water sterilization is shortened and the hot water sterilization time is shortened. As a result, the amount of heat energy and water required for hot water sterilization can be reduced. In addition, the water passage includes a portion where bacteria are relatively easy to propagate (for example, NO. 1 activated carbon tower 31) and a portion where bacteria are relatively difficult to reproduce (for example, anion exchange tower 34). Since the hot water sterilization can be performed individually by selecting the sterilization route, the hot water sterilization frequency of the hot water sterilization route in which bacteria are relatively easy to propagate can be increased. On the other hand, the hot water sterilization frequency of the hot water sterilization route in which bacteria are relatively difficult to propagate can be lowered, and efficient hot water sterilization is possible. Furthermore, for water treatment equipment where contaminants accumulated by hot water sterilization may be detached and mixed into hot water, this water treatment equipment and downstream water treatment equipment can be used as another hot water sterilization route. By separating, it is possible to prevent contamination of the downstream water treatment equipment.

Moreover, in this Embodiment, it comprised so that the water for hot-water disinfection of a different water quality might be supplied with respect to the water heating apparatus 51. FIG. Accordingly, for example, the amount of pure water used as treated water can be greatly reduced, and a more economical apparatus for producing pure water for beverages and foods can be provided.
Further, in the present embodiment, the water is drained through the hot water sterilization water drain pipe 43. That is, in the water treatment unit 30 for performing the hot water sterilization, a drainage path for discharging the hot water subjected to the hot water sterilization is provided separately from the path for processing the raw water. As a result, for example, a system for reusing hot water, which will be described later, can be easily formed, and it is possible to improve the economic efficiency of the apparatus for producing pure water for beverage / food production.
Note that by installing a plurality of water heating devices in the hot water supply unit 50, it is also possible to simultaneously perform hot water sterilization of a plurality of hot water sterilization paths.

-Second embodiment-
FIG. 3 is a configuration diagram detailing the second embodiment of the pure water production apparatus 20. The second embodiment is greatly different from the first embodiment shown in FIG. 2 in that a circulation system is adopted as the sterilization method. As in the first embodiment shown in FIG. 2, the pure water production apparatus 20 shown in FIG. 3 has a NO.1 activated carbon tower 31, a cation exchange tower 32, an air stripping tower 33, and an anion exchange tower 34 as water treatment equipment. , A desalted water tank 35, a NO. 2 activated carbon tower 36, a cartridge filter 37, an ultraviolet sterilizer 38, and a sterilizing agent injection device 39. Moreover, the point which these several water treatment apparatuses are connected through the water flow path is also the same. And the whole water flow path including the water treatment equipment of the water treatment unit 30 is divided, and it has a plurality of hot water sterilization paths for individually sterilizing by hot water, and has different water qualities. The same is true for supplying water.
The same functions as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted here. Hereinafter, other embodiments are also the same.

  Each of these hot water sterilization paths includes hot water inlet valves 61-1 to 61-7 and hot water outlet valves 62-1 to 62-7, respectively. In the second embodiment shown in FIG. 3, the first hot water inlet valve 61-1 is provided upstream of the raw water flow path to the NO.1 activated carbon tower 31, and the NO.1 activated carbon tower 31 and the cation exchange tower 32 are provided. The 2nd hot water inlet valve 61-2 is provided between these. Further, a third hot water inlet valve 61-3 is provided between the cation exchange tower 32 and the air stripping tower 33, and a fourth hot water inlet valve 61- is provided between the air stripping tower 33 and the anion exchange tower 34. 4 is provided. Further, a fifth hot water inlet valve 61-5 is provided between the anion exchange tower 34 and the desalted water tank 35, and a sixth hot water inlet valve is provided between the desalted water tank 35 and the NO.2 activated carbon tower 36. 61-6 is provided. Furthermore, a seventh hot water inlet valve 61-7 is provided between the NO. 2 activated carbon tower 36 and the cartridge filter 37.

  On the other hand, the first hot water outlet valve 62-is located between the NO. 1 activated carbon tower 31 and the cation exchange tower 32 and further downstream of the raw water passage than the second hot water inlet valve 61-2. 1 is provided. Further, a second hot water outlet valve 62-2 is provided between the cation exchange tower 32 and the air stripping tower 33 and downstream of the raw water flow path from the third hot water inlet valve 61-3. Provided. Similarly, the third hot water outlet valve 62-3 is located between the air stripping tower 33 and the anion exchange tower 34 and downstream of the raw water flow path from the fourth hot water inlet valve 61-4. Is provided. Further, a fourth hot water outlet valve 62-4 is provided between the anion exchange tower 34 and the demineralized water tank 35 and downstream of the raw water flow path from the fifth hot water inlet valve 61-5. Provided. Furthermore, a fifth hot water outlet valve 62 is located between the desalted water tank 35 and the NO. 2 activated carbon tower 36 and downstream of the raw water flow path from the sixth hot water inlet valve 61-6. -5 is provided. The sixth hot water outlet valve 62-6 is located between the NO. 2 activated carbon tower 36 and the cartridge filter 37 and further downstream of the raw water passage than the seventh hot water inlet valve 61-7. Is provided. Furthermore, a seventh hot water outlet valve 62-7 is provided on the downstream side of the raw water passage of the ultraviolet sterilizer 38. Part of the hot water discharged from these hot water outlet valves 62-1 to 62-7 is circulated and used in the hot water supply unit 50 by the action of the switching valve via the hot water sterilization water outlet pipe 63. , A part is discharged out of the device.

  Further, the hot water supply unit 50 of the second embodiment shown in FIG. 3 branches from the hot water sterilization water outlet pipe 63 of the water treatment unit 30 in addition to the configuration shown in FIG. A circulation pipe 64 for circulating the produced hot water is provided. And the hot water tank 55 for performing circulation type hot water sterilization using the water from this circulation pipe 64, and the hot water pump 56 which supplies the hot water sterilization water from the hot water tank 55 toward the water heating device 51 are provided. I have.

表２は、図３に示す純水製造装置２０の熱水殺菌の実施例を示している。表２に示す熱水殺菌経路(１)〜(７)は、図３に示す符号(１)〜(７)に対応している。
昇温速度、殺菌、降温速度などの熱水殺菌条件は、第１の実施形態と同様であり、各熱水殺菌経路に共通している。 Next, the hot water sterilization path in the second embodiment shown in FIG. 3 will be described.

Table 2 shows an example of hot water sterilization of the pure water production apparatus 20 shown in FIG. The hot water sterilization paths (1) to (7) shown in Table 2 correspond to the codes (1) to (7) shown in FIG.
The hot water sterilization conditions such as the temperature rising rate, sterilization, and temperature falling rate are the same as those in the first embodiment, and are common to each hot water sterilization path.

  First, in the hot water sterilization path (1), the raw water is supplied from the first hot water sterilization water switching valve 54-1 to the water heating device 51 by the hot water pump 56 via the hot water sterilization water supply pipe 52 and the hot water tank 55. Is supplied. And the hot water produced | generated by heating raw | natural water with the water heating apparatus 51 passes the hot water supply piping 53, and it is NO.1 activated carbon tower 31 from the 1st hot water inlet valve 61-1 of the water treatment unit 30. To the upstream side of the water passage. This hot water flows in the same direction as the flow of raw water treatment (water flow), and sterilizes the NO. 1 activated carbon tower 31 with hot water. Thereafter, the hot water subjected to the hot water sterilization is drained from the first hot water outlet valve 62-1 via the hot water sterilization water outlet pipe 63. The waste water used for sterilization is supplied to the hot water tank 55 via the circulation pipe 64 by switching by a valve, and can be recycled. Thus, the hot water sterilization route (1) sterilizes the NO. 1 activated carbon tower 31, the sterilization method is circulation, and the hot water sterilization water is raw water. Moreover, the hot water flow direction is the same as the water flow direction. Here, as a result of examination by the inventors, when compared with the number of general bacteria, the number that was more than 300 / ml before sterilization could be reduced to less than 1 / ml after sterilization.

  Next, in the hot water sterilization path (2), similarly, water is heated by the hot water pump 56 from the first hot water sterilization water switching valve 54-1 through the hot water sterilization water supply pipe 52 and the hot water tank 55. Raw water is supplied to the device 51. The hot water heated and generated by the water heating device 51 is supplied to the water flow path from the second hot water inlet valve 61-2 of the water treatment unit 30 via the hot water supply pipe 53. This hot water flows in the same direction as the water flow, and sterilizes the cation exchange tower 32 with hot water. Thereafter, the hot water subjected to the hot water sterilization is drained from the second hot water outlet valve 62-2 via the hot water sterilization water outlet pipe 63. The waste water used for sterilization is supplied to the hot water tank 55 via the circulation pipe 64 by switching by a valve, and can be recycled. Thus, the hot water sterilization path (2) sterilizes the cation exchange tower 32, the sterilization method is circulation, and the hot water sterilization water is raw water. Moreover, the hot water flow direction is the same as the water flow direction. Here, in the hot water sterilization route (2), when compared with the number of general bacteria, what was 20 to 100 / ml before sterilization could be reduced to less than 1 / ml after sterilization.

  Next, in the hot water sterilization path (3), similarly, water is heated by the hot water pump 56 from the first hot water sterilization water switching valve 54-1 through the hot water sterilization water supply pipe 52 and the hot water tank 55. Raw water is supplied to the device 51. The hot water generated by heating the raw water by the water heating device 51 is supplied to the water flow path from the third hot water inlet valve 61-3 of the water treatment unit 30 via the hot water supply pipe 53. The This hot water flows in the same direction as the water flow, and sterilizes the air stripping tower 33 with hot water. Thereafter, the hot water subjected to the hot water sterilization treatment is drained from the third hot water outlet valve 62-3 via the hot water sterilization water outlet pipe 63. The waste water used for sterilization is supplied to the hot water tank 55 via the circulation pipe 64 by switching by a valve, and can be recycled. Thus, the hot water sterilization path (3) sterilizes the air stripping tower 33, the sterilization method is circulation, and the hot water sterilization water is raw water. Moreover, the hot water flow direction is the same as the water flow direction. Here, in the hot water sterilization route (3), when compared with the number of general bacteria, what was 20 to 100 / ml before sterilization could be reduced to less than 1 / ml after sterilization.

  In the hot water sterilization route (4), the second hot water sterilization water switching valve 54-2 passes through the hot water sterilization water supply pipe 52 and the hot water tank 55, and the hot water pump 56 supplies the water heating device 51 with a cation tower treatment. Water is supplied. The hot water generated by heating the cation tower treated water by the water heating device 51 passes through the hot water supply pipe 53 and passes through the fourth hot water inlet valve 61-4 of the water treatment unit 30. To be supplied. This hot water flows in the same direction as the water flow, and sterilizes the anion exchange tower 34 with hot water. Thereafter, the hot water subjected to the hot water sterilization treatment is drained from the fourth hot water outlet valve 62-4 via the hot water sterilization water outlet pipe 63. The waste water used for sterilization is supplied to the hot water tank 55 via the circulation pipe 64 by switching by a valve, and can be recycled. Thus, the hot water sterilization route (4) sterilizes the anion exchange tower 34, the sterilization method is circulation, and the hot water sterilization water is cation tower treated water. Moreover, the hot water flow direction is the same as the water flow direction. In addition, when compared with the number of general bacteria, what was less than 1 / ml to 50 / ml before sterilization could be reduced to less than 1 / ml after sterilization.

  In the hot water sterilization route (5), the third hot water sterilization water switching valve 54-3 passes through the hot water sterilization water supply pipe 52 and the hot water tank 55, and the hot water pump 56 applies the anion tower treatment to the water heating device 51. Water is supplied. The hot water generated by heating the anion tower treated water in the water heating device 51 passes through the hot water supply pipe 53 and passes through the fifth hot water inlet valve 61-5 of the water treatment unit 30. To be supplied. This hot water flows in the same direction as the water flow, and sterilizes the desalted water tank 35 with hot water. Thereafter, the hot water subjected to the hot water sterilization treatment is drained from the fifth hot water outlet valve 62-5 via the hot water sterilization water outlet pipe 63. The waste water used for sterilization is supplied to the hot water tank 55 via the circulation pipe 64 by switching by a valve, and can be recycled. Thus, the hot water sterilization path (5) sterilizes the desalted water tank 35, the sterilization method is circulation, and the hot water sterilization water is anion tower treated water. Moreover, the hot water flow direction is the same as the water flow direction. Moreover, when compared with the number of general bacteria, what was less than 1 / ml to 2 / ml before sterilization could be reduced to less than 1 / ml after sterilization.

  In the hot water sterilization route (6), the treated water is supplied to the water heating device 51 by the hot water pump 56 from the third hot water sterilization water switching valve 54-3 through the hot water sterilization water supply pipe 52 and the hot water tank 55. Supplied. The hot water generated by heating the anion tower treated water in the water heating device 51 passes through the hot water supply pipe 53 and passes through the sixth hot water inlet valve 61-6 of the water treatment unit 30. To be supplied. This hot water flows in the same direction as the water flow, and sterilizes the NO. 2 activated carbon tower 36 with hot water. Thereafter, the hot water subjected to the hot water sterilization treatment is drained from the sixth hot water outlet valve 62-6 via the hot water sterilization water outlet pipe 63. The waste water used for sterilization is supplied to the hot water tank 55 via the circulation pipe 64 by switching by a valve, and can be recycled. Thus, the hot water sterilization path (6) sterilizes the NO. 2 activated carbon tower 36, the sterilization system is circulation type, and the hot water sterilization water is anion tower treated water. Moreover, the hot water flow direction is the same as the water flow direction. Moreover, when compared with the number of general bacteria, what was 10 / ml to 20 / ml before sterilization could be reduced to less than 1 / ml after sterilization.

  In the hot water sterilization path (7), the third water hot sterilization water switching valve 54-3 passes through the hot water sterilization water supply pipe 52 and the hot water tank 55, and the hot water pump 56 supplies the water heating device 51 with anion tower treatment. Water is supplied. The hot water generated by heating the treated water in the water heating device 51 is supplied to the water flow path from the seventh hot water inlet valve 61-7 of the water treatment unit 30 via the hot water supply pipe 53. Is done. This hot water flows in the same direction as the water flow, and sterilizes both the cartridge filter 37 and the ultraviolet sterilizer 38 with hot water. Thereafter, the hot water is drained from the seventh hot water outlet valve 62-7 via the hot water sterilization water outlet pipe 63. The waste water used for sterilization is supplied to the hot water tank 55 via the circulation pipe 64 by switching by a valve, and can be recycled. Thus, the hot water sterilization path (7) sterilizes the cartridge filter 37 and the ultraviolet sterilizer 38, the sterilization method is circulation type, and the hot water sterilization water is anion tower treated water. Moreover, the hot water flow direction is the same as the water flow direction. Furthermore, when compared with the number of general bacteria, it was less than 1 / ml to 2 / ml before sterilization and less than 1 / ml after sterilization.

  The second embodiment configured as described above can save heat energy and water by adopting circulating hot water sterilization in addition to the same effects as the first embodiment.

− Third Embodiment −
FIG. 4 is a configuration diagram detailing the third embodiment of the pure water production apparatus 20. In the third embodiment, the portion provided with the circulation type hot water sterilization path (hot water sterilization path (8)) is a point to be noted. As in the first embodiment shown in FIG. 2, the pure water production apparatus 20 shown in FIG. 4 includes a NO.1 activated carbon tower 31, a cation exchange tower 32, an air stripping tower 33, and an anion exchange tower 34 as water treatment equipment. , A desalted water tank 35, a NO. 2 activated carbon tower 36, a cartridge filter 37, an ultraviolet sterilizer 38, and a sterilizing agent injection device 39. Moreover, the point which these several water treatment apparatuses are connected through the water flow path is also the same. And the whole water flow path including the water treatment equipment of the water treatment unit 30 is divided, and it has a plurality of hot water sterilization paths for individually sterilizing by hot water, and has different water qualities. The same is true for supplying water.

In the third embodiment shown in FIG. 4, the water treatment unit 30 is provided with hot water inlet valves 71-1 to 71-6 and hot water outlet valves 72-1 to 72-7. As a hot water drainage treatment, hot water sterilizing water drainage pipe 73 to be discharged to the outside as it is, and hot water via the fourth hot water outlet valve 72-4 and the seventh hot water outlet valve 72-7 are used. It has a hot water sterilization water drain pipe 74 for circulation.
On the other hand, in addition to the first embodiment shown in FIG. 2, the hot water supply unit 50 has a function corresponding to the circulating hot water sterilization path by the hot water sterilization paths (5) and (8). That is, a circulation pipe 75 branched from the hot water sterilization water drain pipe 74 by a valve, a hot water tank 55 for performing circulation type hot water sterilization using water circulated through the circulation pipe 75, The hot water pump 56 for supplying water from the water tank 55, the water heating device 51-2 for heating the water supplied from the hot water pump 56, and the hot water heated by the water heating device 51-2 are treated with water. A hot water supply pipe 53-2 for supplying to the unit 30 is provided. Further, a fourth hot water sterilization water switching valve 54-4, a fifth hot water sterilization water switching valve 54-5, and a hot water sterilization water supply pipe 52-2 for supplying raw water to the hot water tank 55 are provided. Yes.

表３は、図４に示す純水製造装置２０の熱水殺菌の実施例を示している。表３に示す熱水殺菌経路(１)〜(８)は、図４に示す符号(１)〜(８)に対応している。尚、熱水殺菌経路(１)と(８)については、どちらかを選択して実施する。
昇温速度、殺菌、降温速度などの熱水殺菌条件は、第１の実施形態および第２の実施形態と同様であり、各熱水殺菌経路に共通している。 Next, a hot water sterilization path in the third embodiment shown in FIG. 4 will be described.

Table 3 shows an example of hot water sterilization of the pure water production apparatus 20 shown in FIG. The hot water sterilization paths (1) to (8) shown in Table 3 correspond to the codes (1) to (8) shown in FIG. In addition, about hot water sterilization path | route (1) and (8), it selects and implements either.
The hot water sterilization conditions such as the temperature rising rate, sterilization, and temperature falling rate are the same as those in the first embodiment and the second embodiment, and are common to each hot water sterilization path.

  First, the hot water sterilization paths (1) to (4) are the same as the hot water sterilization paths (1) to (4) in the first embodiment shown in FIG. 2 (and Table 1). The hot water inlet valve and the hot water outlet valve used are the first hot water inlet valve 71-1, the first hot water outlet valve 72-1, and the hot water sterilization path (2) in the hot water sterilization path (1). In the hot water sterilization path (3), the second hot water inlet valve 71-2 and the third hot water outlet valve 72 are used. -3. In the hot water sterilization route (4), the third hot water inlet valve 71-3 and the third hot water outlet valve 72-3 are used. And the waste_water | drain used for these hot-water sterilization processes is discharged | emitted via the water drain piping 73 for hot-water sterilization. The various contents shown in Table 3 are the same as the hot water sterilization paths (1) to (4) in the first embodiment shown in Table 1.

  In the hot water sterilization route (5), the water heating device 51-2 is operated by the hot water pump 56 from the fourth hot water sterilization water switching valve 54-4 through the hot water sterilization water supply pipe 52-2 and the hot water tank 55. The anion tower treated water is supplied to. The hot water heated and generated by the water heating device 51-2 passes from the fourth hot water inlet valve 71-4 of the water treatment unit 30 to the water passage through the hot water supply pipe 53-2. Supplied. This hot water flows in the same direction as the water flow, and sterilizes the desalted water tank 35 with hot water. Thereafter, the hot water subjected to the hot water sterilization is drained from the fourth hot water outlet valve 72-4 via the hot water sterilization water drain pipe 74. The waste water used for sterilization is supplied to the hot water tank 55 via the circulation pipe 75 by switching by a valve, and is recycled. Thus, the hot water sterilization path (5) sterilizes the desalted water tank 35, the sterilization method is circulation, and the hot water sterilization water is anion tower treated water. Moreover, the hot water flow direction is the same as the water flow direction. Furthermore, when compared with the number of general bacteria, it was less than 1 / ml to 2 / ml before sterilization and less than 1 / ml after sterilization.

  In the hot water sterilization paths (6) and (7), the anion tower treated water is supplied from the third hot water sterilization water switching valve 54-3, and the heat in the first embodiment shown in FIG. 2 (and Table 1). The hot water sterilization process is performed in the same manner as the water sterilization paths (6) and (7). That is, the anion tower treated water is supplied to the water heating device 51 from the third hot water sterilization water switching valve 54-3 via the hot water sterilization water supply pipe 52. The hot water heated and generated by the water heating device 51 is supplied from the fifth hot water inlet valve 71-5 of the water treatment unit 30 to the water flow path via the hot water supply pipe 53. The hot water sterilization path (6) sterilizes the NO. 2 activated carbon tower 36, and is discharged from the fifth hot water outlet valve 72-5 via the hot water sterilization water drain pipe 73. The hot water sterilization path (7) sterilizes the cartridge filter 37 and the ultraviolet sterilizer 38, and is discharged from the sixth hot water outlet valve 72-6 via the hot water sterilization water drain pipe 73. In addition, the various contents shown in Table 3 are the same as the hot water sterilization paths (6) and (7) in the first embodiment shown in Table 1.

  The hot water sterilization route (8) is selectively used as the hot water sterilization route (1), and is used for hot water sterilization. In this hot water sterilization route (8), raw water is supplied, and from the fifth hot water sterilization water switching valve 54-5 via the hot water sterilization water supply pipe 52-2 and the hot water tank 55, by the hot water pump 56. It is supplied to the water heating device 51-2. The hot water heated and generated by the water heating device 51-2 passes from the sixth hot water inlet valve 71-6 of the water treatment unit 30 to the water passage through the hot water supply pipe 53-2. Supplied. This hot water flows in the same direction as the water flow, and sterilizes the No. 1 activated carbon tower 31 with hot water. Thereafter, the hot water subjected to the hot water sterilization is drained from the seventh hot water outlet valve 72-7 via the hot water sterilization water drain pipe 74. The waste water used for sterilization is supplied to the hot water tank 55 via the circulation pipe 75 by switching by a valve, and is recycled. Thus, the hot water sterilization route (8) sterilizes the No. 1 activated carbon tower 31, the sterilization system is circulation type, and the hot water sterilization water is raw water. Moreover, the hot water flow direction is the same as the water flow direction. Furthermore, when compared with the number of general bacteria, those that were more than 300 / ml before sterilization could be reduced to less than 1 / ml after sterilization.

  In addition to the same effects as in the first embodiment, the third embodiment configured as described above can save thermal energy and water by partially adopting circulating hot water sterilization. Although the hot water sterilization of the desalted water tank 35 and the NO. 1 activated carbon tower 31 is a circulation type through the hot water sterilization paths (5) and (8), this is because the capacity of these water treatment devices is large, Focuses on the large amount of water used. In other words, by adopting a circulation system for a portion that uses a large amount of hot water, it is possible to reduce the cost of equipment and save thermal energy and water.

− Fourth Embodiment −
FIG. 5 is a configuration diagram detailing the fourth embodiment of the pure water production apparatus 20. In this 4th Embodiment, the content of the water treatment apparatus arrange | positioned in the water treatment unit 30 differs from the 1st-3rd embodiment shown in FIGS. The water treatment unit 30 of the pure water production apparatus 20 shown in FIG. 5 includes a NO. 1 activated carbon tower 31, a desalted water tank 35, a NO. 2 activated carbon tower 36, a cartridge filter 37, an ultraviolet sterilizer 38, and a sterilizing agent injector 39. have. Further, instead of the ion exchange apparatus (cation exchange tower 32, air stripping tower 33, anion exchange tower 34) used in the first to third embodiments, a cartridge filter 87 and a reverse osmosis membrane module unit 88 are provided. ing. The reverse osmosis membrane module filled in the reverse osmosis membrane module unit 88 is not particularly limited in material and shape as long as it can remove inorganic ions, organic matter, and a small amount of suspended matter contained in the treated water of the activated carbon tower. . For example, a polyamide-based spiral composite membrane reverse osmosis membrane module is used. In the reverse osmosis membrane module unit 88, depending on the quality of the water supplied to the reverse osmosis membrane device, about 70 to 90% of the normal supply water is taken out from the reverse osmosis membrane device treated water piping as permeated water (treated water), and the rest 10 to 30% of the concentrated water (reverse osmosis membrane module unit concentrated water) is discharged out of the apparatus.

  In the fourth embodiment shown in FIG. 5, the water treatment unit 30 includes hot water inlet valves 81-1 to 81-3 and hot water outlet valves 82-1 to 82-5 that form the hot water sterilization paths. And a hot water sterilization water drain pipe 83 and a concentrated water pipe 84. Here, the first hot water inlet valve 81-1 is provided between the NO.1 activated carbon tower 31 and the cartridge filter 87, and the second hot water is provided between the desalted water tank 35 and the NO.2 activated carbon tower 36. An inlet valve 81-2 is provided. Further, a third hot water inlet valve 81-3 is provided between the NO. 2 activated carbon tower 36 and the cartridge filter 37. On the other hand, the 1st hot water outlet valve 82-1 is provided in the upstream of the distribution | circulation (water flow) of the raw water treatment of NO.1 activated carbon tower 31. FIG. In addition, a second hot water outlet valve 82-2 is provided that is branched from the water flow path for taking out the treated water of the reverse osmosis membrane module unit 88, and the third hot water outlet valve 82-2 is provided downstream of the reverse osmosis membrane module unit 88. The hot water outlet valve 82-3 is provided. Further, a fourth hot water outlet valve 82-4 is provided between the desalted water tank 35 and the NO. 2 activated carbon tower 36, and a fifth hot water outlet valve 82-5 is provided downstream of the ultraviolet sterilizer 38. ing. The hot water sterilization waste water from each hot water outlet valve 82-1 to 82-5 is discharged out of the recovery device via the hot water sterilization water drain pipe 83.

表４は、図５に示す純水製造装置２０の熱水殺菌の実施例を示している。表４に示す熱水殺菌経路(１)〜(５)は、図５に示す符号(１)〜(５)に対応している。
昇温速度、殺菌、降温速度などの熱水殺菌条件は、第１〜第３の実施形態と同様であり、各熱水殺菌経路に共通している。 Next, a hot water sterilization path in the fourth embodiment shown in FIG. 5 will be described.

Table 4 shows an example of hot water sterilization of the pure water production apparatus 20 shown in FIG. The hot water sterilization paths (1) to (5) shown in Table 4 correspond to the codes (1) to (5) shown in FIG.
The hot water sterilization conditions such as the temperature rise rate, sterilization, and temperature drop rate are the same as those in the first to third embodiments, and are common to the respective hot water sterilization paths.

  First, in the hot water sterilization route (1), raw water is supplied from the first hot water sterilization water switching valve 54-1 to the water heating device 51 via the hot water sterilization water supply pipe 52. Then, the hot water generated by being heated by the water heating device 51 passes through the hot water supply pipe 53 from the first hot water inlet valve 81-1 of the water treatment unit 30 to the NO.1 activated carbon tower 31. Supplied downstream of the water path. This hot water flows in the direction opposite to the flow (water flow) of the raw water treatment, and sterilizes the NO. 1 activated carbon tower 31 with hot water. Thereafter, the hot water subjected to the hot water sterilization is drained out of the apparatus from the first hot water outlet valve 82-1 via the hot water sterilization water drain pipe 83. Thus, the hot water sterilization route (1) sterilizes the NO. 1 activated carbon tower 31, the sterilization method is transient, and the hot water sterilization water is raw water. Moreover, the hot water flow direction is opposite to the water flow direction. In addition, when compared with the number of general bacteria, the number that was more than 300 / ml before sterilization was less than 1 / ml after sterilization.

  Next, in the hot water sterilization route (2), the NO.1 activated carbon tower treated water is supplied from the second hot water sterilization water switching valve 54-2 to the water heating device 51 via the hot water sterilization water supply pipe 52. To be supplied. As the NO.1 activated carbon tower treated water, for example, treated water after being treated in the NO.1 activated carbon tower 31 is used. The hot water heated and generated by the water heating device 51 passes through the hot water supply pipe 53 and passes through the NO. 1 activated carbon tower 31 from the first hot water inlet valve 81-1 of the water treatment unit 30. Supplied downstream of the water path. This hot water flows in the same direction as the water flow, and sterilizes the cartridge filter 87 and the reverse osmosis membrane module unit 88 with hot water. Thereafter, the hot water subjected to the hot water sterilization is drained from the second hot water outlet valve 82-2 and / or the third hot water outlet valve 82-3 via the hot water sterilization water drain pipe 83. . In this way, the hot water sterilization path (2) sterilizes the cartridge filter 87 and the reverse osmosis membrane module unit 88, the sterilization method is transient, and the hot water sterilization water is NO.1 activated carbon tower treated water. Moreover, the hot water flow direction is the same as the water flow direction. Here, in the hot water sterilization route (2), when compared with the number of general bacteria, it was less than 1 / ml to 5 / ml before sterilization and less than 1 / ml after sterilization.

  In the hot water sterilization path (3), (4), (5), the reverse osmosis treated water is supplied from the third hot water sterilization water switching valve 54-3 via the hot water sterilization water supply pipe 52 to the water heating device. 51. As the reverse osmosis treated water, for example, treated water after being treated by the reverse osmosis membrane module unit 88 is used. In the hot water sterilization path (3), the hot water heated and generated by the water heating device 51 passes through the hot water supply pipe 53 and passes through the second hot water inlet valve 81-2. And flows in the direction opposite to the water flow, and sterilizes the desalted water tank 35 with hot water. Thereafter, the water is discharged from the third hot water outlet valve 82-3 through the hot water sterilization water drain pipe 83. Thus, the hot water sterilization path (3) sterilizes the desalted water tank 35, the sterilization method is transient, and the hot water sterilization water is reverse osmosis treated water. Moreover, the hot water flow direction is opposite to the water flow direction. Here, in the hot water sterilization route (3), when compared with the number of general bacteria, what was less than 1 / ml to 2 / ml before sterilization may be less than 1 / ml after sterilization. did it.

  In the hot water sterilization path (4), the hot water heated and generated by the water heating device 51 passes through the hot water supply pipe 53 and passes through the third hot water inlet valve 81-3. The NO. 2 activated carbon tower 36 is sterilized with hot water. Thereafter, the water is discharged from the fourth hot water outlet valve 82-4 via the hot water sterilization water drain pipe 83. Thus, the hot water sterilization route (4) sterilizes the NO. 2 activated carbon tower 36, the sterilization method is transient, and the hot water sterilization water is reverse osmosis treated water. Moreover, the hot water flow direction is opposite to the water flow direction. Here, in the hot water sterilization route (3), when compared with the number of general bacteria, what was 10 / ml to 20 / ml before sterilization can be reduced to less than 1 / ml after sterilization. It was.

In the hot water sterilization path (5), the hot water heated and generated by the water heating device 51 passes through the hot water supply pipe 53 and passes through the third hot water inlet valve 81-3. And flows in the same direction as the water flow, and sterilizes the cartridge filter 37 and the ultraviolet sterilizer 38 with hot water. Thereafter, the water is drained from the fifth hot water outlet valve 82-5 via the hot water sterilization water drain pipe 83. In this way, the hot water sterilization path (5) sterilizes the cartridge filter 37 and the ultraviolet sterilizer 38, the sterilization method is transient, and the hot water sterilization water is reverse osmosis treated water. Moreover, the hot water flow direction is the same as the water flow direction. Here, in the hot water sterilization route (3), when compared with the number of general bacteria, what was less than 1 / ml to 2 / ml before sterilization may be less than 1 / ml after sterilization. did it.
Thus, according to the fourth embodiment, efficient hot water sterilization can be performed on the water treatment unit 30 including the reverse osmosis membrane module unit 88, and bacterial growth can be effectively suppressed. .

  As described above in detail, according to the present embodiment (first to fourth embodiments), hot water sterilization can be performed more efficiently than conventional devices, and stable operation can be achieved. The pure water manufacturing apparatus 20 which manufactures the pure water used for drink and foodstuff manufacturing which can perform can be provided.

(A)-(c) is the figure which showed the example of the pure water system | strain of the drink and food factory to which this Embodiment is applied. It is the block diagram which explained in detail the 1st Embodiment of the pure water manufacturing apparatus. It is the block diagram which detailed 2nd Embodiment of the pure water manufacturing apparatus. It is the block diagram which detailed 3rd Embodiment of the pure water manufacturing apparatus. It is the block diagram which detailed 4th Embodiment of the pure water manufacturing apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Beverage / food manufacturing process, 20 ... Pure water manufacturing apparatus, 30 ... Water treatment unit, 50 ... Hot water supply unit

Claims (13)

A pure water production apparatus for producing pure water used for production of beverages or foods from raw water,
A water treatment unit and a hot water supply unit;
The water treatment unit includes a plurality of water treatment devices for removing impurities contained in the raw water and a plurality of hot waters for dividing a water passage including the water treatment device of the water treatment unit to sterilize with hot water. A sterilization route,
The hot water supply unit includes a water heating device for heating the hot water sterilization water, a plurality of hot water sterilization water supply pipes for supplying hot water sterilization water of different water quality to the water heating device, and the water A hot water supply pipe for supplying hot water from a heating device to the plurality of hot water sterilization paths.   The pure water production apparatus according to claim 1, wherein the plurality of hot water sterilization paths of the water treatment unit include a hot water inlet valve and a hot water outlet valve.   The water heating device of the hot water supply unit heats hot water sterilizing water for performing transient hot water sterilization of the water treatment equipment, and is one of the plurality of hot water sterilizing water supply pipes. 2. The pure water producing apparatus according to claim 1, wherein water for sterilizing hot water having a specific water quality is supplied from a supply pipe to the water heating apparatus.   The hot water supply unit includes a hot water tank, a hot water pump, a water heating device, and a plurality of hot water sterilization water supplies for supplying hot water sterilization water to the hot water tank. The pure water manufacturing apparatus according to claim 1, further comprising a pipe.   The pure water production apparatus according to claim 1, wherein the hot water supply unit includes a bubble separator and a gas discharge valve for removing bubbles in the hot water from the hot water in the hot water supply pipe. .   The pure water manufacturing apparatus according to claim 1, further comprising an operation panel for selecting a path for performing hot water sterilization from the plurality of hot water sterilization paths.   2. The pure water production apparatus according to claim 1, wherein hot water sterilization is performed at different frequencies for the plurality of hot water sterilization paths.   The plurality of hot water sterilization paths include a transient hot water sterilization path and a circulating hot water sterilization path, and any one of these is selected to perform the hot water sterilization. Pure water production equipment. A pure water production apparatus for producing pure water used for production of beverages or foods from raw water,
A water treatment unit and a hot water supply unit;
The water treatment unit includes a plurality of water treatment devices for removing impurities contained in the raw water and a plurality of hot waters for dividing a water passage including the water treatment device of the water treatment unit to sterilize with hot water. A sterilization route,
The hot water supply unit includes a water heating device for heating hot water sterilization water, a hot water sterilization water supply pipe for supplying hot water sterilization water to the water heating device, and a plurality of the water heating devices from the water heating device. A hot water supply pipe for supplying hot water to the hot water sterilization path of the water treatment unit and a water flow path of the water treatment unit for discharging the water after sterilizing the water treatment equipment to the outside A deionized water production apparatus comprising: A hot water sterilization method of a pure water production apparatus for producing pure water used for production of beverages or foods from raw water,
A pure water production apparatus that divides into units of one or a plurality of water treatment devices constituting the pure water production apparatus, and performs hydrothermal sterilization with different water quality and / or different frequency for each of the divided units. Hot water sterilization method.   The hot water sterilization method according to claim 10, wherein the hot water sterilization is performed by a transient hot water sterilization in which hot water is not reused or a circulating hot water sterilization in which hot water is reused.   The hot water sterilization method according to claim 10, wherein the hot water sterilization is carried out by selecting hot water in each unit by selecting the same direction or reverse direction as the flow of pure water.   The hot water sterilization is characterized in that the hot water subjected to the hot water sterilization is discharged out of the apparatus by using a drainage path provided separately from a path used for water passage for pure water production. Item 11. The hot water sterilization method according to Item 10.

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