JP2014188465A - Pure water production device - Google Patents

Abstract

The present invention provides a pure water production apparatus that is suitable for equipment replacement or maintenance work and has a high degree of freedom in installing optional equipment.
Various devices (4, 8, 10, 12, 14, 151, 152, 154, 16) constituting the pure water production apparatus (1) are accommodated in a cabinet (100). Of the various devices, the devices 4, 10, 14, and 16 that have a relatively high frequency of replacement or maintenance are arranged on at least one side of the cabinet 100 so as to be operable.
[Selection] Figure 1

Description

  The present invention relates to a pure water production apparatus including a reverse osmosis membrane module that separates permeate from feed water and a deionization unit that deionizes the permeate to obtain deionized water.

  High-purity pure water that does not contain impurities is used in the manufacture of pharmaceuticals and cosmetics, the cleaning of electronic parts and precision equipment, and the like. When manufacturing this kind of pure water, a pure water manufacturing apparatus may be used. As pure water production equipment, reverse osmosis membrane module (hereinafter also referred to as “RO membrane module”) that separates permeate from supply water, and desalination treatment (deionization treatment) of permeate separated by reverse osmosis membrane module There is known a pure water production apparatus including an electrodeionization stack (hereinafter also referred to as an “EDI stack”) as a deionization section for obtaining demineralized water (deionized water) (see, for example, Patent Document 1). ). A pure water manufacturing apparatus is comprised by accommodating various apparatuses, such as such a reverse osmosis membrane module and an electrodeionization stack, in a cabinet.

JP 2001-259376 A

  Among the devices of the pure water production apparatus as described above, there are devices that are relatively frequently replaced or maintained. For this reason, arrangement of devices suitable for this kind of replacement or maintenance work is required.

  On the other hand, for example, the decarbonation membrane module may be used as an option in a pure water production apparatus. The decarbonation membrane module obtains deaerated water by degassing the permeated water separated by the reverse osmosis membrane module. Deionized water is obtained by deionizing the degassed water obtained by the decarbonation membrane module with an electrodeionization stack. When the decarbonation membrane module is used, a vacuum pump used for operating the decarbonation membrane module and a sealed water tank for storing sealed water used for the vacuum pump are also required. Therefore, a high degree of freedom in installing optional equipment such as a decarbonation membrane module is also required.

  An object of the present invention is to provide a pure water producing apparatus that is suitable for equipment replacement or maintenance work, and that has a high degree of freedom in installing optional equipment.

  The present invention is a pure water production apparatus in which various devices constituting the pure water production device are accommodated in a cabinet, and among the various devices, a device having a relatively high frequency of replacement or maintenance is provided in the cabinet. The present invention relates to an apparatus for producing pure water, which is arranged so as to be operable on at least one side.

  The equipment having a relatively high frequency of replacement or maintenance includes a pre-filter for pre-filtering the feed water, a reverse osmosis membrane module for separating permeate from the feed water pre-filtered by the pre-filter, and the reverse osmosis membrane And an electrodeionization stack that obtains deionized water by deionizing the permeated water separated by the module.

  The various devices include a pre-filter for pre-filtering the feed water, a reverse osmosis membrane module for separating permeate from the feed water pre-filtered by the pre-filter, and the reverse osmosis of the pre-filtered feed water It is preferable that a pressurizing pump for feeding into the membrane module and an electrodeionization stack for obtaining deionized water by deionizing the permeated water separated by the reverse osmosis membrane module.

  The various devices include a decarbonation membrane module that obtains deaerated water by degassing the permeated water separated by the reverse osmosis membrane module, a vacuum pump used to operate the decarbonation membrane module, A sealed water tank for storing sealed water used for the vacuum pump, and the electrodeionization stack obtains deionized water by deionizing the degassed water obtained by the decarbonation membrane module. It is preferable.

  It is preferable that the decarbonation module, the vacuum pump, and the sealed water tank are optional.

  The at least one side of the cabinet is preferably the front side of the cabinet.

  It is preferable that the space for accommodating the decarbonation module, the vacuum pump, and the sealed water tank is disposed near another side surface different from the front side of the cabinet.

  It is preferable that one-step reverse osmosis membrane treatment is performed by the reverse osmosis membrane module and the pressure pump.

  The reverse osmosis membrane module includes a first reverse osmosis membrane module that separates first permeated water from supply water prefiltered by the prefilter, and a first permeated water separated by the first reverse osmosis membrane module. A second reverse osmosis membrane module that separates two permeated waters, wherein the pressurization pump is configured to supply the pre-filtered feed water to the first reverse osmosis membrane module; A second pressurizing pump for feeding the first permeated water separated by the 1 reverse osmosis membrane module to the second reverse osmosis membrane module, the first reverse osmosis membrane module and the second reverse osmosis membrane module, In addition, it is preferable that the two-stage reverse osmosis membrane treatment is performed by the first pressure pump and the second pressure pump.

  ADVANTAGE OF THE INVENTION According to this invention, while being suitable for the replacement | exchange or maintenance work of an apparatus, the pure water manufacturing apparatus with a high freedom degree of installation of an optional apparatus can be provided.

It is the perspective view seen from the left front which shows arrangement | positioning of each apparatus of the pure water manufacturing apparatus 1 which concerns on one Embodiment. It is the perspective view seen from the left rear which shows arrangement | positioning of each apparatus of the pure water manufacturing apparatus 1 which concerns on one Embodiment. It is the schematic which shows the function of each apparatus of the pure water manufacturing apparatus 1 which concerns on one Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Drawing 1 is a perspective view seen from the left front which shows arrangement of each equipment of pure water manufacture device 1 concerning one embodiment. Drawing 2 is a perspective view seen from the left rear which shows arrangement of each equipment of pure water manufacture device 1 concerning one embodiment. FIG. 3 is a schematic diagram illustrating the function of each device of the pure water production apparatus 1 according to an embodiment. In FIG. 3, optional devices other than the devices shown in FIGS. 1 and 2 are also shown for explaining the function of the pure water production apparatus 1.

First, with reference to FIG. 1, FIG. 2, the arrangement | positioning of each apparatus of the pure water manufacturing apparatus 1 which concerns on this embodiment is demonstrated.
As shown in FIGS. 1 and 2, the pure water production apparatus 1 according to the present embodiment is also referred to as a pre-filter 4 and a first-stage pressurizing pump (hereinafter referred to as “first-stage RO pressurizing pump”) as a first pressurizing pump. ) 8, a front reverse osmosis membrane module (hereinafter also referred to as “front RO membrane module”) 10 as a first reverse osmosis membrane module, an intermediate tank 11, and a rear pressure pump (hereinafter referred to as a second pressure pump). , A “rear RO pressurization pump”) 12, a rear reverse osmosis membrane module (hereinafter also referred to as a “rear RO membrane module”) 14 as a second reverse osmosis membrane module, a decarbonation membrane module 151, a vacuum A pump 152, a sealed water tank 154, an electrodeionization stack (hereinafter also referred to as “EDI stack”) 16, and a control box 35 having a touch panel 36 are provided. All these devices constituting the pure water production apparatus 1 are accommodated in the cabinet 100. 1 and 2, lines (fluid piping) that connect the devices are not shown. In addition, the cabinet 100 only shows the frame, and the illustration of the wall panel is omitted.

Of the devices shown in FIGS. 1 and 2, the prefilter 4 has a relatively high frequency of replacement or maintenance of the filter element. The pre-stage RO membrane module 10 and the post-stage RO membrane module 14 also have a relatively high frequency of replacement or maintenance of the RO membrane element. The EDI stack 16 also has a relatively high frequency of replacement or maintenance of the EDI stack body.
The decarbonation module 151, the vacuum pump 152, and the sealed water tank 154 are not essential devices for the pure water production apparatus 1, but are optional. That is, in the pure water production apparatus 1, the decarbonation membrane module 151, the vacuum pump 152, and the sealed water tank 154 are devices that are arbitrarily selected to be provided or not provided.

  The cabinet 100 is substantially composed of a parallelepiped. On the front side of the cabinet 100 (the right front side in FIG. 1), the EDI stack 16 is disposed at the lower right side with the drawer side (for example, end plate side) of the EDI stack body facing the front side. A control box 35 is disposed above the EDI stack 16. An intermediate tank 11 is disposed behind the EDI stack 16 and the control box 35. A rear stage RO pressurizing pump 12 is disposed behind the intermediate tank 11. The rear RO pressurizing pump 12 is located on the back side of the cabinet 100 (the left front side in FIG. 2). On the front side of the cabinet 100, the upstream RO pressurizing pump 8 is disposed on the left side of the EDI stack 16 and the control box 35. The front-stage RO pressurization pump 8 is located at substantially equal intervals from the left and right walls of the cabinet 100.

  On the front side of the cabinet 100, the front-stage RO membrane module 10 and the rear-stage RO membrane module 14 are arranged on the left side of the front-stage RO pressurizing pump 8 with the RO membrane element drawing side facing the front side. Specifically, on the left side of the front-stage RO pressurization pump 8, a front-stage RO membrane module 10 and a rear-stage RO membrane module are constituted by a front rack 101 that rises upward at a front position and a rear rack 102 that rises upward at a rear position. 14 is supported at its front and rear. In FIG. 1 and FIG. 2, the lower three are the front-stage RO membrane modules 10, and the upper two are the rear-stage RO membrane modules 14. On the front side of the cabinet 100, the prefilter 4 is disposed on the left side with the filter element extraction side facing upward (that is, with the housing standing in the vertical direction). The pre-filter 4 is located on the left side of the front RO membrane module 10 and the rear RO membrane module 14 supported by the front rack 101 and the rear rack 102.

  When viewed from the front side of the cabinet 100, a space 103 exists behind the pre-filter 4 located in front of the front RO membrane module 10 and the rear RO membrane module 14 supported by the front rack 101 and the rear rack 102. To do. When viewed from the left side of the cabinet 100, the space 103 has a short depth but a wide frontage, and has a certain size. In this space 103, a decarbonation membrane module 151, a vacuum pump 152, and a sealed water tank 154 are arranged.

  Next, with reference to FIG. 3, the function of each apparatus of the pure water manufacturing apparatus 1 which concerns on this embodiment is demonstrated. The pure water production apparatus 1 according to the present embodiment is applied to, for example, a pure water production apparatus that produces demineralized water (deionized water) from raw water (for example, tap water). The desalinated water produced by the pure water production apparatus 1 is sent as pure water to a demand location or the like. In the pure water production apparatus 1 according to the present embodiment, supplying pure water to a demand point or the like is also referred to as “water sampling”.

  The pre-stage pressurizing pump 8 shown in FIGS. 1 and 2 is shown in association with the pre-stage inverter 9 in FIG. The post-stage pressurizing pump 12 shown in FIGS. 1 and 2 is shown in association with the post-stage inverter 13 in FIG. The decarbonation membrane module 151, the vacuum pump 152, and the sealed water tank 154 shown in FIGS. 1 and 2 are shown as a high-level conceptual decarboxylation device 15 including them in FIG. The control box 35 having the touch panel 36 shown in FIGS. 1 and 2 is shown in FIG. 3 as the control unit 30 and the input operation unit 40 (touch panel 36), and is shown in association with the DC power supply device 50 and the display unit 60.

  In addition to the devices shown in FIGS. 1 and 2, FIG. 3 shows a first optional device OP1, a second optional device OP2, a first flow path switching valve V71, a second flow path switching valve V72, and a fourth optional device OP4. Indicates. The first optional device OP <b> 1 includes a water softener 2 and an activated carbon filter 3. The second optional device OP2 includes a hardness sensor S1 and a residual chlorine sensor S2. The fourth optional device OP4 includes a second specific resistance sensor RS2, a total organic carbon sensor TOC, and a third temperature sensor TE3.

  The pure water production apparatus 1 includes a supply water line L1, a front-stage RO permeate water line L22, a front-stage RO permeate return line L43, a front-stage RO concentrated water return line L53, a rear-stage RO permeate water line L23, and a rear-stage RO permeation. The water return line L44, the back | latter stage RO concentrated water return line L54, the desalted water line L3, and the desalted water return line L45 are provided. The “line” in the present specification is a general term for lines capable of flowing a fluid such as a flow path, a radial path, and a pipeline.

  Supply water W1 flows through the supply water line L1. The supply water line L1 is a line through which the supply water W1 is circulated to the upstream RO membrane module 10. The supply water line L1 includes a first supply water line L11 and a second supply water line L12.

  The raw water W11 (supply water W1) flows through the first supply water line L11. The first supply water line L11 is a line that connects a supply source (not shown) of the raw water W11 and the water softener 2. The upstream end of the first supply water line L11 is connected to a supply source (not shown) of the raw water W11. Further, the downstream end of the first supply water line L <b> 11 is connected to the water softener 2.

  The water softener 2 is an apparatus that manufactures the soft water W12 (feed water W1) by replacing the hardness component contained in the raw water W11 with sodium ions. The water softener 2 has an ion exchange tower containing a cation exchange resin bed in a pressure tank.

  Soft water W12 (supply water W1) flows through the second supply water line L12. The 2nd supply water line L12 is a line which distribute | circulates the soft water W12 to the front | former stage RO membrane module 10. FIG. The 2nd supply water line L12 is a line which connects the water softener 2 and the front | former stage RO membrane module 10. FIG. The upstream end of the second supply water line L12 is connected to the water softener 2. The downstream end of the second supply water line L12 is connected to the primary inlet port (the inlet of the supply water W1) of the upstream RO membrane module 10.

  The activated carbon filter 3 is a device that removes chlorine components (mainly free residual chlorine) contained in the soft water W12 (feed water W1). The activated carbon filter 3 has a filtration tower in which a filter medium bed made of activated carbon is housed in a pressure tank. The activated carbon filter 3 purifies the soft water W12 (feed water W1) by decomposing and removing the chlorine component contained in the soft water W12, adsorbing and removing organic components, and capturing suspended substances.

  The prefilter 4 is a filter that removes fine particles contained in the soft water W12 (supply water W1) purified by the activated carbon filter 3. The prefilter 4 is configured by accommodating a filter element in a housing. As the filter element, for example, a nonwoven fabric filter element or a thread-wound filter element having a filtration accuracy of 1 to 50 μm is used.

  The hardness sensor S1 is a device that measures the total hardness (that is, the hardness leak amount) of the supply water W1 flowing through the supply water line L1. The residual chlorine sensor S2 is a device that measures the free residual chlorine concentration (that is, chlorine leak amount) of the supply water W1 flowing through the supply water line L1. The hardness sensor S1 and the residual chlorine sensor S2 are connected to the supply water line L1. The hardness sensor S1 and the residual chlorine sensor S2 are electrically connected to the control unit 30. The hardness leak amount measured by the hardness sensor S1 and the chlorine leak amount measured by the residual chlorine sensor S2 are respectively transmitted as detection signals to the first control unit 31 of the control unit 30.

  The pre-stage pressurization pump 8 is a device that sucks in the supply water W1 flowing through the supply water line L1 and pumps (discharges) it toward the pre-stage RO membrane module 10. The pre-stage pressurizing pump 8 is supplied with driving power whose frequency is converted from the pre-stage inverter 9. The pre-stage pressurizing pump 8 is driven at a rotational speed corresponding to the frequency of the supplied driving power (hereinafter also referred to as “operation frequency”).

  The front-stage inverter 9 is an electric circuit (or a device having the circuit) that supplies driving power whose frequency is converted to the front-stage pressurization pump 8. The pre-stage inverter 9 is electrically connected to the control unit 30. A command signal is input to the pre-stage inverter 9 from the first control unit 31 of the control unit 30. The pre-stage inverter 9 outputs drive power having an operation frequency corresponding to the command signal (current value signal or voltage value signal) input by the first control unit 31 to the pre-stage pressurization pump 8.

  The pre-stage RO membrane module 10 converts the feed water W1 pumped by the pre-stage pressurizing pump 8 into pre-stage permeate water W2 as pre-treatment water from which dissolved salts have been removed, and concentrated water W3 in which dissolved salts are concentrated. To separate. The pre-stage RO membrane module 10 is configured by accommodating a single or a plurality of spiral RO membrane elements in a pressure vessel (vessel). Examples of the RO membrane used for the RO membrane element include a crosslinked aromatic polyamide composite membrane. Examples of RO membrane elements composed of a crosslinked aromatic polyamide composite membrane include: Toray Industries, Inc .: model name “TMG20-400”, Eunjin Chemical Co., Ltd .: model name: “RE8040-BLF”, Nitto Denko Corporation: model name: “ESPA1” Are commercially available, and these elements can be suitably used.

  The upstream RO concentrated water return line L53 is a line that returns a portion W31 of the concentrated water W3 separated by the upstream RO membrane module 10 to the supply water line L1. The upstream end of the upstream RO concentrated water return line L53 is connected to the primary outlet port (the outlet of the concentrated water W3) of the upstream RO membrane module 10. The downstream end of the upstream RO concentrated water return line L53 is connected to the supply water line L1 before the upstream pressurizing pump 8.

  The front-stage RO permeate line L22 is a line through which the front-stage permeate water W2 separated by the front-stage RO membrane module 10 flows to the rear-stage RO membrane module 14. The upstream end of the upstream RO permeate line L22 is connected to the secondary port of the upstream RO membrane module 10 (exit of the upstream permeate W2). The downstream end of the upstream RO permeate line L22 is connected to the primary inlet port (inlet of the upstream permeate W2) of the downstream RO membrane module 14 via the intermediate tank 11 or the like.

  The pre-stage RO permeate return line L43 is a line that returns the pre-stage permeate water W2 separated by the pre-stage RO membrane module 10 to the supply water line L1 upstream of the pre-stage RO membrane module 10. The upstream end of the upstream RO permeate return line L43 is connected to the secondary port (the outlet of the upstream permeate W2) of the upstream RO membrane module 10. The downstream end of the upstream RO permeate return line L43 is connected to the upstream RO concentrated water return line L53.

  The intermediate tank 11 is provided between the front RO membrane module 10 and the rear RO membrane module 14 in the front RO permeate line L22. The intermediate tank 11 is a tank that stores the previous-stage permeated water W <b> 2 separated by the previous-stage RO membrane module 10.

  The post-stage pressurizing pump 12 is a device that sucks the pre-stage permeated water W2 stored in the intermediate tank 11 and pumps it toward the post-stage RO membrane module 14. The post-stage pressurizing pump 12 is supplied with drive power having a frequency converted from the post-stage inverter 13. The post-stage pressurizing pump 12 is driven at a rotational speed corresponding to the frequency of the supplied driving power (hereinafter also referred to as “operation frequency”).

  The rear-stage inverter 13 is an electric circuit (or a device having the circuit) that supplies driving power whose frequency is converted to the rear-stage pressurization pump 12. The rear stage inverter 13 is electrically connected to the control unit 30. A command signal is input to the rear stage inverter 13 from the first control unit 31 of the control unit 30. The rear stage inverter 13 outputs driving power having an operation frequency corresponding to the command signal (current value signal or voltage value signal) input from the first control unit 31 to the rear stage pressurizing pump 12.

  The latter-stage RO membrane module 14 is separated from the first-stage permeate W2 separated from the first-stage RO membrane module 10 and pumped by the second-stage pressurization pump 12, with the second-stage permeate W4 from which dissolved salts are removed from the first-stage permeate W2. Separated into concentrated water W5 enriched with salts. The post-stage RO membrane module 14 is configured by accommodating a single or a plurality of spiral RO membrane elements in a pressure vessel (vessel).

  The rear-stage RO concentrated water return line L54 is a line that returns a part W51 of the concentrated water W5 separated by the rear-stage RO membrane module 14 to the front-stage RO permeated water line L22. The upstream end of the rear-stage RO concentrated water return line L54 is connected to the primary-side outlet port (concentrated water outlet) of the rear-stage RO membrane module 14. The downstream end of the downstream RO concentrated water return line L54 is connected to the upstream RO permeate line L22 before the downstream pressurizing pump 12.

  The latter-stage RO permeated water line L23 is a line through which the latter-stage permeated water W4 separated by the latter-stage RO membrane module 14 is circulated to the decarboxylation device 15 (when the decarboxylation device 15 is used as an option). The upstream end portion of the rear-stage RO permeate line L23 is connected to the secondary port (the outlet of the rear-stage permeate water W4) of the rear-stage RO membrane module 14. The downstream end of the downstream RO permeate line L23 is connected to the decarboxylation device 15.

  The decarboxylation device 15 degasses the free carbonic acid (dissolved carbon dioxide gas) contained in the post-stage permeated water W4 separated by the post-stage RO membrane module 14 with the gas separation membrane module, and degassed water (degassed permeated water) ). By providing the decarboxylation device 15 on the downstream side of the post-stage RO membrane module 14, free carbon dioxide that easily permeates the RO membrane can be removed from the post-stage permeate water W4. Therefore, the latter-stage permeated water W4 with higher purity can be obtained. In the decarboxylation device 15 of the present embodiment, an external perfusion type gas separation membrane module made of a hollow fiber membrane is used, and a sweep gas such as air is introduced while the inside of the hollow fiber membrane is sucked by a vacuum pump (not shown). The free carbon dioxide is exhausted while being transferred into the sweep gas through the membrane wall. As a gas separation membrane module suitable for such an application, for example, a product name “Liqui-Cel G-521R” manufactured by Celgard Co., Ltd. may be mentioned. The decarboxylation device 15 is used to operate the decarboxylation membrane module 151 for deaerating the post-stage permeated water W4 separated by the post-stage RO membrane module 14 to obtain deaeration water W42, and the decarbonation membrane module 151. A vacuum pump 152 and a sealed water tank 154 that stores sealed water used for the vacuum pump 152 are included.

  The first flow path switching valve V71 is a flow path (water sampling side flow path) through which the deaerated water W42 deaerated by the decarbonation membrane module 151 of the decarbonation device 15 is circulated toward the EDI stack 16. The automatic valve can be switched to a flow path (circulation-side flow path) that circulates toward the intermediate tank 11 via the rear-stage RO permeate return line L44. The first flow path switching valve V71 is configured by, for example, an electric or electromagnetic three-way valve. The first flow path switching valve V71 is electrically connected to the control unit 30. Switching of the flow path in the first flow path switching valve V71 is controlled by a flow path switching signal transmitted from the second control unit 32 of the control unit 30.

  The post-stage RO permeate return line L44 is an intermediate between the pre-stage RO membrane module 10 and the post-stage RO membrane module 14 and degassed water W42 deaerated by the decarbonation membrane module 151 of the decarboxylation device 15. This is a line that returns to the tank 11.

  The EDI stack 16 is a water treatment device that obtains demineralized water W6 and concentrated water by demineralizing (deionizing) the degassed water W42 degassed by the decarbonation membrane module 151 of the decarboxylation device 15. is there. The EDI stack 16 is electrically connected to the DC power supply device 50. A DC voltage is applied to the EDI stack 16 from the DC power supply device 50. The EDI stack 16 is energized by the DC voltage applied from the DC power supply device 50 and operates.

  The DC power supply device 50 applies a DC voltage between the pair of electrodes of the EDI stack 16. The DC power supply device 50 is electrically connected to the control unit 30. The DC power supply device 50 outputs a DC voltage to the EDI stack 16 in response to the command signal input by the second control unit 32 of the control unit 30. When a DC voltage is applied from the DC power supply device 50, the EDI stack 16 is degassed water W42 degassed by the decarbonation membrane module 151 of the decarboxylation device 15 (originally separated by the subsequent RO membrane module 14). Deionized water (deionized water) W6 is obtained by deionizing post-stage permeated water W4).

  The second flow path switching valve V72 is a flow path (water sampling side flow path) for sending the desalted water W6 obtained in the EDI stack 16 toward the demand point via the desalted water line L3, or the desalted water return. It is an automatic valve that can be switched to a flow path (circulation side flow path) that flows toward the intermediate tank 11 via a line L45. The second flow path switching valve V72 is configured by, for example, an electric or electromagnetic three-way valve. The second flow path switching valve V72 is electrically connected to the control unit 30. Switching of the flow path in the second flow path switching valve V72 is controlled by a flow path switching signal transmitted from the second control unit 32 of the control unit 30.

  The 2nd flow-path switching valve V72 sends out the desalinated water W6 obtained by the EDI stack 16 from the desalted water line L3 to a demand point by being switched to the water sampling side flow path by the 2nd control part 32. It functions as sending means capable of executing processing.

  The demineralized water return line L45 returns the demineralized water W6 obtained in the EDI stack 16 from the middle of the demineralized water line L3 to the intermediate tank 11 provided between the front RO membrane module 10 and the rear RO membrane module 14. It is a line to do. In the present embodiment, the upstream end of the desalted water return line L45 is connected to the second flow path switching valve V72. The downstream end of the desalted water return line L45 is connected to the intermediate tank 11.

  The second pressure sensor PS2 is connected to the upstream RO permeated water line L22. The third temperature sensor TE3 is connected to the desalted water line L3. The total organic carbon sensor TOC is a device that detects the amount of organic carbon in the desalted water W6 flowing through the desalted water line L3. Organic carbon is carbon in organic matter present in water. The total organic carbon sensor TOC is connected to the desalted water line L3. The total organic carbon detection sensor TOC is electrically connected to the control unit 30. The total organic carbon amount of the demineralized water W6 detected by the total organic carbon sensor TOC is transmitted to the control unit 30 as a detection signal.

  The input operation unit 40 is an input interface that receives an input operation of a user or an administrator for selection related to the operation mode of the device (for example, selection of operation / stop, release of alarm, etc.) and various settings related to the operation condition of the device. is there. The input operation unit 40 includes an operation panel that combines a display and button switches, a touch panel that directly operates on the display, and the like. In the present embodiment, the input operation unit 40 is configured by a touch panel 36. The input operation unit 40 is electrically connected to the control unit 30. Information input from the input operation unit 40 is transmitted to the control unit 30.

  The display unit 60 displays desired information. The display unit 60 is electrically connected to the control unit 30.

  The control unit 30 includes a first control unit 31 and a second control unit 32. The first control unit 31 and the second control unit 32 are configured by a microprocessor (not shown) including a CPU and a memory. The CPU of the microprocessor executes various controls described later according to a predetermined program read from the memory. Data and various programs for controlling the pure water production apparatus 1 are stored in the memory of the microprocessor. The microprocessor incorporates an integrated timer unit (hereinafter also referred to as “ITU”) that manages timekeeping and the like. A detailed description of the operation of the control unit 30 is omitted.

Next, the operation of the pure water production apparatus 1 according to this embodiment will be described.
1 and 2 constituting the pure water production apparatus 1, the prefilter 4 having a relatively high frequency of replacement or maintenance of the filter element is located above the drawer side of the filter element on the front side of the cabinet 100. It is arranged toward the side (that is, with the housing standing vertically). The front-stage RO membrane module 10 and the rear-stage RO membrane module 14 that have a relatively high frequency of replacement or maintenance of the RO membrane element are arranged in the cabinet 100 with the RO membrane element pull-out side facing the front side. The EDI stack 16 having a relatively high frequency of replacement or maintenance of the EDI stack main body is disposed on the front side of the cabinet 100 with the drawer side (for example, end plate side) of the EDI stack main body facing the front side.

  Therefore, the filter element replacement or maintenance work for the pre-filter 4 is performed on the front side of the cabinet 100. The replacement or maintenance work of the RO membrane elements for the front-stage RO membrane module 10 and the rear-stage RO membrane module 14 is performed on the front side of the cabinet 100. The replacement or maintenance work of the EDI stack main body with respect to the EDI stack 16 is performed on the front side of the cabinet 100.

  Of the devices shown in FIGS. 1 and 2 constituting the pure water production apparatus 1, the decarbonation module 151, the vacuum pump 152, and the sealed water tank 154 are optional devices. On the left side of the cabinet 100, there is a space 103 that is gathered to some extent. Using the space 103, a decarbonation membrane module 151, a vacuum pump 152, and a sealed water tank 154 as optional devices are arranged.

According to the pure water manufacturing apparatus 1 which concerns on this embodiment mentioned above, the following effects are show | played, for example.
(1) Among the devices constituting the pure water production apparatus 1, the prefilter 4 has a relatively high frequency of replacement or maintenance of the filter element. The pre-filter 4 is arranged on the front side of the cabinet 100 with the filter element drawing side facing upward (that is, with the housing standing vertically). Therefore, the filter element replacement or maintenance work for the pre-filter 4 is performed on the front side of the cabinet 100.
Thereby, the replacement | exchange or maintenance work of the filter element with respect to the pre filter 4 can be easily performed in the front side of the cabinet 100, and is excellent in workability | operativity.

(2) The pre-stage RO membrane module 10 and the post-stage RO membrane module 14 have a relatively high frequency of replacement or maintenance of the RO membrane element. The front-stage RO membrane module 10 and the rear-stage RO membrane module 14 are arranged in the cabinet 100 with the draw-out side of the RO membrane element facing the front side. Therefore, the replacement or maintenance work of the RO membrane element for the front-stage RO membrane module 10 and the rear-stage RO membrane module 14 is performed on the front side of the cabinet 100.
Thereby, the replacement | exchange or maintenance operation | work of the RO membrane element with respect to the front | former stage RO membrane module 10 and the back | latter stage RO membrane module 14 can be easily performed in the front side of the cabinet 100, and is excellent in workability | operativity.

(3) The EDI stack 16 has a relatively high frequency of replacement or maintenance of the EDI stack body. The EDI stack 16 is arranged on the front side of the cabinet 100 with the EDI stack body drawer side (for example, end plate side) facing the front side. Therefore, replacement or maintenance work of the EDI stack main body with respect to the EDI stack 16 is performed on the front side of the cabinet 100.
Thereby, the work of exchanging or maintaining the EDI stack main body with respect to the EDI stack 16 can be easily performed on the front side of the cabinet 100, and the workability is excellent.

(4) The decarbonation module 151, the vacuum pump 152, and the sealed water tank 154 are optional devices. On the left side of the cabinet 100, there is a space 103 that is gathered to some extent. Using the space 103, a decarbonation membrane module 151, a vacuum pump 152, and a sealed water tank 154 as optional devices are arranged.
As a result, when an optional device is selected, the necessary decarbonation membrane module 151, vacuum pump 152, and sealed water tank 154 can be easily laid out and installed in the space 103. At this time, since the optional device can be installed without removing any of the existing non-optional devices, the degree of freedom in installing the optional device is high.

The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and can be implemented in various forms.
For example, replacement or maintenance of the filter element for the pre-filter 4, replacement or maintenance of the RO membrane element for the front RO membrane module 10 and the rear RO membrane module 14, and replacement or maintenance of the EDI stack main body for the EDI stack 16 You may arrange | position each apparatus so that work may be performed not on the front side of the cabinet 100 but in any one side, such as the left side surface side or the right side surface side. Accordingly, the position of the space 103 in which the decarbonation membrane module 151, the vacuum pump 152, and the sealed water tank 154 as optional devices are arranged may be changed.

  Instead of the two-stage reverse osmosis membrane treatment by the front-stage RO membrane module 10 and the rear-stage RO membrane module 14, a single-stage reverse osmosis membrane treatment may be used. As described above, the types and the number of devices constituting the pure water production apparatus 1 are not limited to the above-described embodiments, and the types and the numbers of devices having a relatively high frequency of replacement or maintenance are also included in the above-described embodiments. Not limited.

DESCRIPTION OF SYMBOLS 1 Pure water manufacturing apparatus 4 Pre filter 8 Pre-stage pressurization pump (1st pressurization pump)
10 Pre-stage RO membrane module (first reverse osmosis membrane module)
12 Second-stage pressurization pump (second pressurization pump)
14 Subsequent RO membrane module (second reverse osmosis membrane module)
16 EDI stack (Electrodeionization stack)
100 Cabinet 151 Decarbonation module 152 Vacuum pump 154 Sealed water tank W1 Supply water W2 Pre-stage permeate (first permeate)
W4 Rear permeate (second permeate)
W42 Deaerated water

Claims (9)

A device for producing pure water in which various devices constituting the device for producing pure water are housed in a cabinet,
Of the various devices, a device having a relatively high frequency of replacement or maintenance is arranged to be operable on at least one side of the cabinet.
Pure water production equipment. For equipment with a relatively high frequency of replacement or maintenance,
A prefilter for pre-filtering the feed water;
A reverse osmosis membrane module for separating permeate from feed water prefiltered by the prefilter;
An electrodeionization stack for obtaining deionized water by deionizing the permeated water separated by the reverse osmosis membrane module,
The pure water manufacturing apparatus according to claim 1. The various devices include
A prefilter for pre-filtering the feed water;
A reverse osmosis membrane module for separating permeate from feed water prefiltered by the prefilter;
A pressure pump for feeding the pre-filtered feed water to the reverse osmosis membrane module;
An electrodeionization stack for obtaining deionized water by deionizing the permeated water separated by the reverse osmosis membrane module,
The pure water manufacturing apparatus according to claim 1 or 2. The various devices include
A decarboxylation membrane module that obtains deaerated water by degassing the permeated water separated by the reverse osmosis membrane module;
A vacuum pump used to operate the decarbonation module;
A sealed water tank for storing sealed water used for the vacuum pump, and
The electrodeionization stack obtains deionized water by deionizing the degassed water obtained by the decarbonation membrane module.
The pure water manufacturing apparatus according to claim 3. The decarbonation module, the vacuum pump and the sealed water tank are optional.
The pure water manufacturing apparatus according to claim 4. The at least one side of the cabinet is a front side of the cabinet;
The pure water manufacturing apparatus of any one of Claims 1-5. The space for housing the decarbonation module, the vacuum pump, and the sealed water tank is disposed near another side surface different from the front side of the cabinet.
The pure water manufacturing apparatus according to claim 6.   The pure water manufacturing apparatus according to any one of claims 3 to 7, wherein one-step reverse osmosis membrane treatment is performed by the reverse osmosis membrane module and the pressure pump. The reverse osmosis membrane module is
A first reverse osmosis membrane module for separating the first permeated water from the feed water prefiltered by the prefilter;
A second reverse osmosis membrane module that separates the second permeated water from the first permeated water separated by the first reverse osmosis membrane module,
The pressure pump is
A first pressure pump for feeding the pre-filtered feed water to the first reverse osmosis membrane module;
A second pressurizing pump that feeds the first permeated water separated by the first reverse osmosis membrane module to the second reverse osmosis membrane module,
The two-stage reverse osmosis membrane treatment is performed by the first reverse osmosis membrane module, the second reverse osmosis membrane module, the first pressure pump, and the second pressure pump. The pure water manufacturing apparatus of Claim 1.

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