JP4883489B2 - Water treatment system - Google Patents

Description

  The present invention relates to a water treatment system.

  2. Description of the Related Art Conventionally, water treatment systems that produce high-purity treated water from raw water such as groundwater and factory wastewater and that can be used for boiler water, cooling towers, drinking water, and the like are known.

  For example, in Patent Document 1, a well submersible pump, an iron removal / manganese filtration device, an activated carbon filtration device, a separation membrane module, and a backwash tank are sequentially arranged in series, and the well water is supplied by an inverter built in the control panel. A water purifier for controlling the operation drive of a medium pump is disclosed.

  Further, in Patent Document 2, a submersible pump, a raw water tank, a sand filtration device, a microfiltration device, a cushion tank, and a storage tank are sequentially arranged in series, and a storage tank is provided by a water distribution pump arranged at the subsequent stage of the storage tank. A water quality control device for supply purified water is disclosed in which the treated water inside is fed to a raw water tank.

  Further, in Patent Document 3, an activated carbon filtration device, a water softening device, a prefilter, a membrane filtration device, and a water tank are sequentially arranged on a water supply line, and the treated water stored in the water tank is supplied to the boiler. A water supply system is disclosed.

  As described above, in the conventional water treatment system, pretreatment is performed using one or a plurality of regenerative filtration devices according to the quality of the raw water, and after removing contaminants suspended in the raw water, the membrane filtration device Using this, microfiltration or ultrafiltration is performed to obtain treated water of desired water quality according to the application.

Japanese Patent Laying-Open No. 2005-95812 (FIG. 1) Japanese Patent Laying-Open No. 2003-340435 (FIG. 1) Japanese Patent Laying-Open No. 2005-334798 (FIG. 1)

  By the way, the membrane filtration apparatus includes a microfiltration membrane (hereinafter referred to as “MF membrane”), an ultrafiltration membrane (hereinafter referred to as “UF membrane”), a nanofiltration membrane (hereinafter referred to as “NF membrane”), Depending on the type of membrane, such as reverse osmosis membrane (hereinafter referred to as “RO membrane”), the mechanical structure differs, and depending on the required processing capacity and water quality, it may be installed in multiple stages. The operation itself of producing treated water is the same. Therefore, regarding water supply treatment control, the control board built in the membrane filtration device absorbs the difference due to the type of the membrane filtration device, so that it can be handled electrically in a unified manner. It is considered easy.

  On the other hand, the pretreatment is performed using a regenerative filtration device such as the above-described iron removal / manganese filtration device, activated carbon filtration device, sand filtration device, etc., but the regenerative filtration device depends on the amount of treated water and the quality of raw water There are various types, sizes, numbers, etc., and the processing capacity of the raw water pump is also different. Therefore, unlike the water supply treatment control, the pretreatment control is difficult to handle in a unified manner, and needs to be handled individually according to the quality of the raw water and the required treatment capacity.

  However, in the conventional water treatment systems as shown in Patent Documents 1 to 3, since the entire system consisting of the pretreatment control and the feed water treatment control is generally controlled at once, the regenerative filtration device and the raw water pump The control system of the entire system must be individually constructed according to the specifications, and there is a problem that it is inefficient and has a large economic loss.

  In recent years, there has been a demand for realization of a water treatment system with high added value. For example, various sensors such as hardness monitoring devices are installed in the piping, and the system can be controlled while linking the soft water device and the membrane filtration device with these sensors, and it is possible to communicate with external communication equipment. Realization of a high value-added water treatment system is required.

  However, in the conventional water treatment system, as described above, the entire system is collectively controlled, so that it takes a long time for individual basic design, and if the above-described added value is added, a further design period is required. May lead to an increase in the cost and cost. Therefore, it has been difficult to realize a high value-added water treatment system that satisfies the user's requirements in a short time and at a low cost.

  The present invention has been made in view of such circumstances. By designing the pretreatment control system and the water supply treatment control system separately and independently, and by linking them together, various variations can be achieved at low cost. An object of the present invention is to provide a water treatment system that is compatible and has a highly convenient function with high added value.

In order to achieve the above object, a water treatment system according to the present invention includes a pretreatment block including at least a raw water pump and a regenerative filtration device as components, and a membrane for treating water to be treated supplied from the pretreatment block. A water treatment block that includes a filtration device and a treatment water tank that stores treated water that has passed through the membrane filtration device, and has a function of adjusting the amount of water supply, and a control that controls the pretreatment block and the water treatment block In the water treatment system, the control means includes a first control unit that controls each component of the pretreatment block, and a second control that controls each component of the water supply treatment block. It is separated into a section, wherein the first controller and the second controller is electrically connected, the first control unit, of each component of the water supply processing block The operation permission signal for permitting rotation transmitted to the second control unit, the second control unit, upon receiving the operation permission signal, a water supply request signal requesting supply of water from the pre-processing block It transmits to the said 1st control part, It is characterized by the above-mentioned.

  In the water treatment system of the present invention, the first control unit detects an abnormality of each component of the pretreatment block, and detects an abnormality of any component by the abnormality detection unit. An abnormality notifying unit for notifying the second control unit of an abnormality when the second control unit receives a signal from the abnormality notifying unit, and another path other than the pre-processing block. The storage tank is provided with replenishment means that enables replenishment of water through the tank.

  Furthermore, in the water treatment system of the present invention, the first control unit includes invalid means for invalidating the operation permission signal when any component of the pretreatment block forcibly stops water supply. It is characterized by having.

  Moreover, the water treatment system of the present invention is characterized in that at least one of the first control unit and the second control unit is connected to an external communication device.

  Further, in the water treatment system of the present invention, the regenerative filtration device includes any one of an iron removal / manganese filtration device, a sand filtration device, an activated carbon filtration device, and a combination thereof. Yes.

  Furthermore, in the water treatment system of the present invention, the pretreatment block includes a first chemical injection means for injecting a chemical containing at least a chlorine compound, a first monitoring means for monitoring residual chlorine concentration, and the regenerative filtration. One of the backwashing means for backwashing and regenerating the apparatus and a combination thereof is included.

  In the water treatment system of the present invention, the membrane filtration device includes any of a microfiltration device, an ultrafiltration device, a nanofiltration device, a reverse osmosis filtration device, and a combination thereof. It is said.

  Furthermore, in the water treatment system of the present invention, the water supply treatment block has a second monitoring means for monitoring hardness, a second medicine injection means for injecting a medicine containing any of a reducing agent and a chlorine compound, and Any one of these combinations is included.

  Moreover, the water treatment system of the present invention is characterized in that the chemical contains a dispersing agent for dispersing a hardness component.

  Furthermore, the water treatment system of the present invention is characterized in that a water softener is provided in any one of the pretreatment block and the water supply treatment block.

  In the water treatment system of the present invention, the second control unit delays the operation start timing and operation stop timing of the water supply treatment block by a predetermined time from the operation start timing and operation stop timing of the pretreatment block. It is characterized by having means.

According to the water treatment system of the present invention, the control means includes each component of the pretreatment block ( raw water pump, iron removal / manganese filtration apparatus, sand filtration apparatus, activated carbon filtration apparatus, first chemical injection means, first Monitoring unit, backwashing unit, etc.) and the components of the water treatment block (microfiltration unit, ultrafiltration unit, nanofiltration unit, reverse osmosis filtration unit, second unit) A second control unit that controls the monitoring unit, the second chemical injection unit , the treated water tank, and the like, and the first control unit and the second control unit are electrically connected to each other. At the same time, the first control unit transmits an operation permission signal permitting operation of each component of the water supply processing block to the second control unit, and the second control unit transmits the operation permission signal. When it is received, water supply is required to request water supply from the pretreatment block. And it transmits the signal to the first control unit, the second control unit, water supply request signal to the first control unit or to confirm et al that it is receiving the operation permission signal from the first control unit Is transmitted, each component of the water supply processing block can pass water, and the water supply processing block can start operation. In other words, the pretreatment block acts as a virtual pump for the water supply treatment block, and the raw water passes through the pretreatment block and is supplied to the water supply treatment block. The treated water is produced by the membrane filtration device and stored in the treatment water tank. Is done.

  In the present invention, a first control unit that controls each component of the pretreatment block and a second control unit that controls each component of the water supply processing block are separately constructed, and both are electrically Since it is connected to and linked to each other, a water treatment system that can handle various variations can be easily obtained at a low cost by combining the first control unit and the second control unit that are constructed independently. Can be realized.

  In particular, for water supply treatment, even if the type and arrangement of the membrane filtration device are different, basically the operation of supplying raw water and producing treated water is performed, so the second control unit relating to water supply control is easy. Can be standardized. Therefore, only the first control unit is individually system-designed, or an individual system design is standardized, and the first control unit and the standardized second control unit are combined to provide the entire system. A control system can be constructed. As a result, the design period can be greatly shortened and the cost can be reduced as compared with the conventional case where the entire system configuration is individually designed and collectively controlled.

  In addition, the first control unit includes an abnormality detection unit that detects an abnormality of each component of the preprocessing block, and a second control unit when an abnormality of any component is detected by the abnormality detection unit. An abnormality notifying means for notifying the abnormality, and when the second control unit receives a signal from the abnormality notifying means, the second control section sends the abnormality to the treated water tank via another path other than the pretreatment block. Since it is equipped with replenishment means that enables replenishment of water, even if each component of the pretreatment block is in an abnormal state, water will be replenished to the treated water tank as necessary. There is no problem in supplying water to the equipment.

  In addition, since the first control unit includes invalid means for invalidating the operation permission signal when any component of the preprocessing block forcibly stops water supply, regeneration processing, etc. When water flow to the water supply processing block is interrupted, the operation of the water supply processing block is stopped, so that idling can be prevented and mechanical damage can be avoided.

  In addition, since at least one of the first control unit and the second control unit is connected to an external communication device, it is possible to monitor the system state from the outside. High water treatment system can be realized.

  Other features and operational effects of the present invention will become more apparent from the following description of the embodiments of the present invention.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a system configuration diagram showing an embodiment (first embodiment) of a water treatment system according to the present invention.

  The water treatment system includes a raw water pump 1 that pumps raw water such as ground water and factory waste water, an iron removal / manganese filtration device 2 as a regenerative filtration device, and a soft water device 3 (first and second soft water devices 3a, 3b). ), A reverse osmosis membrane filtration device (hereinafter referred to as “RO device”) 5 for treating the water to be treated supplied from the pretreatment block 4, and treated water that has passed through the RO device 5. And a control block 8 (control means) for controlling each component of the pretreatment block 4 and the water supply processing block 7. It is composed of

  Specifically, the pretreatment block 4 includes the raw water pump 1, the iron removal / manganese removal filtration device 2, and the water softening device 3 sequentially disposed on the raw water supply line 9, and at the end of the pretreatment block 4. Is provided with a water supply control valve 10. Then, a hyponitrous acid injection device 11 (first chemical injection) is provided between the raw water pump 1 and the iron removal / manganese filtration device 2 so that sodium hypochlorite (chlorine compound) can be injected into the raw water. Means) is provided. The hypoinjection device 11 is provided with a level sensor for detecting the storage state of sodium hypochlorite. A residual chlorine concentration monitoring device 12 (first monitoring means) for monitoring the residual chlorine concentration in the raw water is disposed between the iron removal / manganese removal filtration device 2 and the soft water device 3.

  Further, the iron removal / manganese removal filtration apparatus 2 is connected to the treated water tank 6 through a backwash water supply line 13, and a backwash pump 14 is connected to a pipe line of the backwash water supply line 13. Is provided.

  In the iron removal / manganese removal filtration device 2, anthracite obtained by pulverizing anthracite and granulated is layered on a manganese oxidation catalyst. Then, the iron content in the raw water is oxidized and precipitated by the sodium hypochlorite injected by the hypo hypothesis injection device 11, thereby removing the iron content from the raw water. Further, the manganese component in the raw water is oxidized and removed by the manganese oxidation catalyst.

  In addition, the iron removal / manganese removal apparatus 2 has a built-in timer, which periodically shuts off the supply of raw water and performs a regeneration process. That is, the iron removal / manganese removal filter 2 repeats the water flow mode and the regeneration mode every predetermined time (for example, 0.5 to 1 / day). When the iron removal / manganese removal filter 2 enters the regeneration mode by counting the built-in timer, the backwash pump 14 is driven, and the treated water stored in the treated water tank 6 is removed from the iron removal / manganese removal filter 2. The filter medium (anthracite and manganese oxidation catalyst) is back-washed and then washed with water after a predetermined time, whereby the filter medium is regenerated.

  The water softening device 3 is of a two-cylinder type, and the three-way valve 15 allows water to pass through either the first water softening device 3a or the second water softening device 3b so that the raw water softening process is not interrupted. It is configured.

  Specifically, the water softener 3 includes a sodium-type cation exchange resin (not shown), and saturated saline is stored in the cation exchange resin. When raw water is supplied from the raw water supply line 9 to the first soft water device 3a, for example, hardness components such as calcium ions and magnesium ions contained in the raw water are ion-exchanged with sodium ions contained in the saturated saline solution. As a result, the raw water is softened. Further, when the exchange capacity of the cation exchange resin of the first water softener 3a is saturated, the three-way valve 15 is operated by the built-in microcomputer of the water softener 3 so that the second water softener 3b can pass water. Can be switched. And the 1st water softening apparatus 3a will be in regeneration mode, and the 2nd water softening apparatus 3b will be in water flow mode. The first water softener 3a that has entered the regeneration mode supplies saturated saline from a salt water tank (not shown), thereby regenerating the cation exchange resin. Next, the first water softening device 3a that has completed the regeneration process enters the standby mode until the second water softening device 3b enters the regeneration mode.

  As described above, the water softening device 3 is configured so that one of the first water softening device 3a and the second water softening device 3b is in the water flow mode, and the water softening treatment is performed without interrupting the water flow. Is possible.

  Further, the water supply processing block 7 is configured such that the RO device 5 and the treated water tank 6 are sequentially disposed in a replenishment line 16 connected to the raw water supply line 9, and a reducing agent is injected upstream of the RO device 5. A device 17 (second chemical injection means) and a raw water hardness monitoring device 18 (second monitoring means) are sequentially arranged, and a flow meter 19 and hypo-subjection are inserted between the RO device 5 and the treated water tank 6. The device 20 (second drug injection means) is sequentially disposed.

  The reducing agent injection device 17 stores a reducing agent such as sodium bisulfite, and removes residual chlorine in the raw water. The reducing agent injection device 17 is provided with a level sensor that detects the storage state of the reducing agent.

  The raw water hardness monitoring device 18 monitors whether or not the raw water has been softened by the soft water device 3. And when the hardness of raw | natural water shows more than predetermined value, it judges that there exists a possibility that the scale adhesion to the RO membrane mentioned later may increase, and monitors raw | natural water hardness so that the recovery rate of the permeated water of RO apparatus 5 may fall. Cooperation control is performed between the device 18 and the RO device 5.

  The flow meter 19 measures the flow rate of treated water (permeated water) treated by the RO device 5 and transmits the measurement signal to the control block 8. The hypochlorous acid injection device 20 stores sodium hypochlorite (chlorine compound) and suppresses the propagation of treated bacteria. In addition, the hyponitrogenizer 20 is provided with a level sensor that detects the storage state of sodium hypochlorite.

  The RO device 5 includes, for example, an RO module 21 containing a RO membrane element (hereinafter referred to as “RO membrane”) 21 a wound in a spiral shape, and a pressure pump 22. The RO module 21 is separated into a primary side to which raw water is supplied and a secondary side that outputs permeated water that has passed through the RO membrane 21a. In addition, a drain line and a circulation line 24 in which a drain valve 23 is interposed are connected to the secondary side.

In the RO device 5 configured as described above, when the pressurization pump 22 is driven and a high pressure higher than the osmotic pressure is applied to the RO membrane 21a from the primary side, dissolved salts and silica (SiO ₂ ) are removed. Purified permeate flows out to the secondary side, thereby producing treated water. A part of the concentrated water that has not permeated the RO membrane 21 a is returned to the pressurizing pump 22 through the circulation line 24, and the rest is drained from the drain valve 23.

  The treated water tank 6 has a pressure detection type water level sensor 25 inserted in the lower side wall thereof, and the water level sensor 25 controls the supply of treated water to the treated water tank 6.

  Furthermore, a separate line 26 from the replenishment line 16 is connected to the treated water tank 6, and when any component of the pretreatment block 4 detects an abnormal state, the replenishment control valve 27 is opened to Water can be replenished from another line 26. In addition, the water replenished from the separate line 26 can use the raw | natural water pretreated or the membrane filtered water, or these mixed water according to the required water quality.

  The control block 8 includes a first control unit 29 electrically connected to each component of the pretreatment block 4 via the first control line 28, and a water supply treatment block 7 via the second control line 30. And a second control unit 31 electrically connected to each of the components.

  The first control unit 29 and the second control unit 31 are electrically connected. Then, the second control unit 31 transmits a water supply request signal 32 to the first control unit 29, and the first control unit 29 sends an operation permission signal 33 and an abnormality detection signal 34 to the second control unit 31. Send. The first and second control units 29 and 31 are connected to an external communication device (not shown) such as a personal computer or a portable terminal via the first and second communication lines 35 and 36.

  FIG. 2 is a block diagram showing details of the control block 8.

  The first control unit 29 includes an input / output unit 37 that controls an interface operation with each component of the preprocessing block 4, a ROM 38 that stores a predetermined calculation program, and the like, and stores calculation results and a work area. And a CPU 40 that controls the entire preprocessing block and controls communication with the second control unit 31 and external communication devices.

  A predetermined electrical signal is output from the input / output unit 37 to the raw water pump 1, the water supply control valve 10, the backwash pump 14, and the hypoinjection device 11, and the residual chlorine concentration monitoring device 12, the soft water device 3, and the iron removal A predetermined electrical signal is input to the input / output unit 37 from the manganese removal filter 2 and the hypo-injection device 11.

  In addition, the second control unit 31 stores an input / output unit 41 that controls an interface operation with each component of the water supply processing block 7, a ROM 42 that stores a predetermined calculation program, and a calculation result. A RAM 43 used as a work area, and a CPU 44 that controls the entire water supply processing block and controls communication with the first control unit 29 and external communication devices are provided.

  A predetermined electrical signal is output from the input / output unit 41 to the pressurizing pump 22, drain valve 23, replenishment control valve 27, raw water hardness monitoring device 18, reducing agent injecting device 17, hypo-injecting device 20, and raw water hardness. A predetermined electrical signal is input to the input / output unit 41 from the monitoring device 18, the flow meter 19, the water level sensor 25, the reducing agent injection device 17, and the hypo-sub-injection device 20.

  Further, the CPU 44 has a built-in timer 44a, and the timer 44a causes the operation start timing and operation stop timing of the water supply processing block 7 to be longer than the operation start timing and operation stop timing of the pretreatment block 4 by a predetermined time (for example, 20 Controlled to delay (~ 50 seconds).

  That is, in order to supply raw water to the water supply processing block 5 side, it is necessary to open the water supply control valve 10, but it takes a certain time until the water supply control valve 10 is fully opened.

  However, if the pressurization pump 22 is activated and the pressure is increased before the water supply control valve 10 is fully opened, the inlet of the pressurization pump 22 may become negative pressure and an abnormality may occur in the pressurization pump 22. Therefore, it is necessary to delay activation of the pressurizing pump 22 until the water supply control valve 10 is fully opened.

  Therefore, after the second control unit 31 transmits the water supply request signal 32 to the first control unit 29 so that the operation start timing of the water supply processing block 7 is delayed from the operation start timing of the pretreatment block 4, The timer 44a counts for a predetermined time, and then the pressurizing pump 22 is controlled to start.

  On the other hand, when the water level sensor 25 detects the upper limit value, it is necessary to stop the operation of the water supply processing block 7. However, even if a drive stop command is issued from the first control unit 29 to the raw water pump 1, the rotating blades of the raw water pump 1 rotate due to inertia for a certain period of time. For this reason, if the water supply processing block 7 is stopped simultaneously with the drive stop command of the raw water pump 1, the internal pressure of the RO device 5 may be excessively increased or a piping failure such as a water hammer may occur.

  Therefore, the second control unit 31 invalidates the water supply request signal 32 so that the operation stop timing of the water supply processing block 7 is delayed from the operation stop timing of the pretreatment block 4, and then uses the timer 44 a for the raw water pump 1. Control is performed so as to stop the operation of the water supply processing block 7 after measuring a predetermined time such that the rotary blades of the water supply stop.

  The water treatment system configured as described above is operated as follows.

  First, the first control unit 29 transmits an operation permission signal 33 to the second control unit 31. Next, after confirming that the second control unit 31 has received the operation permission signal 33, the second control unit 31 transmits a water supply request signal 32 to the first control unit 29.

The first control unit 29 that has received the water supply request signal 32 issues a drive command to the raw water pump 1 and issues a valve opening command to the water supply control valve 10. The hypochlorous acid injection device 11 injects sodium hypochlorite into the raw water passing through the raw water supply line 9 based on the command signal from the first control unit 29. In the iron removal / manganese removal filter 2, iron contained in the raw water is oxidized and removed by sodium hypochlorite, and further manganese is oxidized and removed. Next, the raw water is softened by the water softening device 3 and is supplied to the water supply processing block 7 through the water supply control valve 10. When the level sensor incorporated in the hypo-injection device 11 detects a predetermined lower limit value, a level lowering signal is transmitted to the first control unit 29, and that is notified to the user by a warning light or an alarm sound, Advise that sodium hypochlorite should be replenished.

  On the other hand, the second control unit that receives the operation permission signal 33 from the first control unit 29 delays a predetermined time (for example, 20 seconds) by the timer 44a, and then operates each component of the water supply processing block 7 to operate. Issue a command.

  In the raw water sent from the pretreatment block 4, the reducing agent from the reducing agent injection device 17 is injected, and residual chlorine and the like contained in the raw water are removed. Next, the raw water is membrane-separated into permeated water and concentrated water by the RO device 5, a part of the concentrated water is returned to the pressurizing pump 22 through the circulation line 24, and the rest is drained from the drain valve 23. On the other hand, the permeated water becomes treated water, passes through the flow meter 19, and sodium hypochlorite from the hyponitrous injection device 20 is injected as needed to replenish the treated water tank 6. When the level sensor built in the reducing agent injecting device 17 or the hypo-injecting device 20 detects a predetermined lower limit value, a level lowering signal is transmitted to the second control unit 31, and a warning light or an alarm sound is sent to that effect. To inform the user that a reductant or sodium hypochlorite should be replenished.

  Further, the raw water hardness monitoring device 18 and the RO device 5 perform the following cooperative control via the second control unit 31. That is, the hardness of the raw water passing through the replenishment line 16 is monitored by the raw water hardness monitoring device 18, and the measurement result is transmitted to the second control unit 31. Then, when the raw water hardness monitoring device 18 detects the raw water hardness of a predetermined value or more, the second control unit 31 determines that there is a possibility that the scale adhesion to the RO membrane 21a may increase, and the pressurizing pump 22 A control signal is transmitted to the drain valve 23 to reduce the permeate recovery rate.

  As described above, in this embodiment, the raw water hardness monitoring device 18 and the RO device 5 are cooperatively controlled via the second control unit 31.

  When the water level sensor 25 detects the upper limit value, the second control unit 31 stops the water supply request signal 32 for the first control unit 29. As a result, the first control unit 29 issues a stop command for the raw water pump 1 and issues a valve closing command to the water supply control valve 10. The second control unit 31 that has stopped the water supply request signal 32 for the first control unit 29 delays a predetermined time (for example, 10 seconds) by the timer 44a, and then instructs each component of the water supply processing block 7 to stop operation. To stop the operation of the water treatment system.

  In addition, when the iron removal / manganese removal filter device 2 enters the regeneration mode while the water supply request signal 32 is being received, the first control unit 29 regenerates the iron removal / manganese removal filter device 2 into the first control unit 29. Send processing signal. The first control unit 29 invalidates the operation permission signal 33, whereby the second control unit 31 invalidates the water supply request signal 32 and stops the operation of the water supply processing block 7. Then, after confirming that the water supply request signal 32 has become invalid, the first control unit 29 stops the raw water pump 1 and drives the backwash pump 14 to remove the iron removal / manganese removal filter 2. Perform the playback process. That is, each component of the water supply treatment block 7 stops operation, and the iron removal / manganese removal apparatus 2 performs a series of regeneration processes of backwashing → pause → water washing to regenerate the filter medium. Then, when the regeneration process is completed, the operation permission signal 33 is enabled to drive the raw water pump 1, and the operation of the water treatment system is started again.

  Further, when an abnormality occurs in any of the components of the preprocessing block 4, the first control unit 29 disables the operation permission signal 33 to the second control unit 31 and outputs an abnormality detection signal 34. The second control unit 31 notifies the abnormality by blinking a warning light, an alarm sound, or the like. Then, when the water level sensor 25 detects the lower limit value when an abnormality occurs, the second control unit 31 opens the supply control valve 27 and supplies water to the treated water tank 6 separately from another line 26.

As described above, in the first embodiment, the first control unit 29 is always in a state where the pretreatment block 4 is operable in response to the water supply request signal 32 from the second control unit 31. An operation permission signal 33 is transmitted to the second control unit 31. If the second control unit 31 determines that water supply is necessary and the operation permission signal 33 from the first control unit 29 is valid, the second control unit 31 transmits a water supply request signal 32 to the first control unit 29. That is, the second control unit, only transmits the water supply request signal to the first verify that it is receiving the operation permission signal from the control unit or we first control unit 29, the water supply processing block 7 Each component of can pass water. That is, the pretreatment block 4 acts like a virtual pump with respect to the water supply treatment block 7, and raw water is supplied to the water supply treatment block 7. The raw water supplied to the water supply processing block 7 is injected with a reducing agent by the reducing agent injection device 17, passes through the RO device 5, and further, sodium hypochlorite is injected by the hyponitrous injection device 20 as necessary. The treated water is stored in the treated water tank 6.

  Moreover, since the control block 8 is separated into the 1st control part 29 which manages each component of the pre-processing block 4, and the 2nd control part 31 which manages each component of the water supply process block 7, it is 2nd By standardizing the control unit 31, it becomes possible to construct a control system by linking such standardized second control unit and the individual or standardized first control unit 29. It is possible to greatly shorten the period and reduce the cost.

  FIG. 3 is a system configuration diagram showing a second embodiment of the water treatment system according to the present invention. In this second embodiment, the water softener 3 does not belong to the pretreatment block 45 but is supplied with water. The system is configured to belong to the processing block 46. And the control block 47 is divided into the 1st control part 48 and the 2nd control part 49 similarly to 1st Embodiment, and the electric signal from the water softener 3 is the 1st control line 50. Instead, it is connected to the second control unit 49 via the second control line 51.

  As shown in the second embodiment, when the water softener 3 is a two-cylinder type, when one softener (eg, the first softener 3a) is in the regeneration mode, the other softener (eg, the first softener 3) Since the two water softeners 3b) are switched by the three-way valve 15 so that water can pass through, it is not necessary to invalidate the operation permission signal 33 for the reason of regeneration processing. Accordingly, the water softening device 3 may belong to either the pretreatment block or the water supply treatment block.

  Also in the second embodiment, the first control unit 49 is always in the second state when the preprocessing block 45 is in a state where it can be operated in response to the water supply request signal 32 from the second control unit 49. The operation permission signal 33 is transmitted to the controller 49. If the second control unit 49 determines that water supply is necessary and the operation permission signal 33 from the first control unit 48 is valid, the second control unit 49 transmits the water supply request signal 32 to the first control unit 48. That is, after the second control unit 49 confirms reception of the operation permission signal 33 from the first control unit 48, the second control unit 49 only transmits the water supply request signal 32 to the first control unit 48. Thus, each component of the water supply processing block 46 can pass water. That is, the pretreatment block 45 acts like a virtual pump on the water supply processing block 46, and raw water is supplied to the water supply processing block 46. The raw water supplied to the water supply treatment block 46 passes through the water softening device 3 and the RO device 5, and sodium hypochlorite is injected by the hypo hypothesis injection device 20 as necessary, and becomes treated water in the treatment water tank 6. Stored.

  In the second embodiment, the following cooperative control can be performed among the water softening device 3, the raw water hardness monitoring device 18, and the RO device 5.

  That is, the hardness of the raw water passing through the replenishment line 16 is monitored by the raw water hardness monitoring device 18, and when the raw water hardness shows a predetermined value or more, the measurement result is subjected to the second control as in the first embodiment. It transmits to the part 31. The 2nd control part 31 judges that there exists a possibility that the scale adhesion to RO membrane 21a may increase, transmits a control signal to pressurization pump 22 and drainage valve 23, and reduces the recovery rate of permeated water. Then, the water supply control is performed with the soft water device (for example, the first soft water device 3a) that is currently passing water in the regeneration mode and the other soft water device (for example, the second soft water device 3b) in the standby mode in the water passing mode. be able to.

  Although not shown, a raw water hardness monitoring device is arranged on the upstream side of the water softening device 3, an integrating flow meter is arranged on the downstream side, and the raw water hardness monitoring device, the soft water device 3, and the integrating flow meter are linked. It is also preferable to control it.

  That is, the measurement results of the raw water hardness monitoring device and the integrating flowmeter are transmitted to the second control unit 46, and the second control unit integrates the measurement results to calculate the removed hardness mass, and the second control unit 46 It is also preferable to perform cooperative control so that the water softener performs the regeneration treatment when the exchange capacity of the cation exchange resin stored in advance is exceeded. And by performing such cooperative control, compared to simply switching between the water flow mode and the regeneration mode with the built-in timer, the exchange capacity of the cation exchange resin can be used up without waste, and the regeneration frequency can also be reduced. It is possible to reduce the amount of saturated saline used during regeneration.

  FIG. 4 is a system configuration diagram showing a third embodiment of the water treatment system according to the present invention. In this third embodiment, a single-cylinder soft water device 52 is configured as a pretreatment block 53. In addition to being incorporated into the element, the water softening device 52 is electrically connected to the first controller 56 of the control block 55 via a first control line 54.

  That is, in the third embodiment, a single-cylinder soft water device 52 is disposed on the raw water supply line 9 instead of the two-cylinder soft water devices 3a and 3b in the first embodiment. In the case of the single cylinder type soft water device 52, it is necessary to block the water flow to the water supply processing block 7 during the regeneration process, and therefore it is necessary to include it in the pretreatment block 53.

  In the third embodiment, when the water softener 52 enters the regeneration mode, a regeneration processing signal is transmitted to the first control unit 56 via the first control line 54, and the first control unit 56 The operation permission signal 33 is invalidated for the second control unit 31 and the operation of the water supply processing block 7 is stopped.

  And also in this 3rd Embodiment, the 1st control part 56 respond | corresponds to the water supply request | requirement signal 32 from the 2nd control part 31 in the 1st control part 56 similarly to the 1st and 2nd embodiment. When the vehicle is in an operable state, the operation permission signal 33 is always transmitted to the second control unit 31. If the second control unit 31 determines that water supply is necessary and the operation permission signal 33 from the first control unit 56 is valid, the second control unit 31 transmits a water supply request signal 32 to the first control unit 56. That is, after the second control unit 31 confirms reception of the operation permission signal 33 from the first control unit 56, the second control unit 31 only transmits the water supply request signal 32 to the first control unit 56. Thus, each component of the water supply processing block 7 can pass water. That is, the pretreatment block 53 acts like a virtual pump on the water supply processing block 7, and raw water is supplied to the water supply processing block 7. The raw water supplied to the water supply treatment block 7 is injected with a reducing agent by the reducing agent injection device 17, then through the RO device 5, and sodium hypochlorite is injected by the hyponitrous injection device 20 as necessary. The treated water is stored in the treated water tank 6.

  FIG. 5 is a system configuration diagram showing a fourth embodiment of the water treatment system according to the present invention. In this fourth embodiment, the pretreatment block 57 is used as a regenerative filtration device to remove iron and remove. In addition to the manganese filtration device 2, the activated carbon filtration device 58 is provided, and the water supply processing block 46 has the two-cylinder soft water device 3 as in the second embodiment.

  That is, in the fourth embodiment, instead of the reducing agent injection device 17 in the first embodiment, an activated carbon filtration device 58 having substantially the same operation as the reducing agent injection device 17 is replaced with a residual chlorine concentration monitoring device. 12 and the water supply control valve 10, and the activated carbon filtration device 58 is configured to be connected to the backwash pump 14 via a branch line 59 branched from the backwash line 13.

  The activated carbon filtration device 58 contains activated carbon in layers and removes residual chlorine and organic substances contained in the raw water. Further, the activated carbon filtration device 58 has a built-in timer as in the case of the iron removal / manganese removal filtration device 2, and periodically performs a regeneration process by interrupting the supply of raw water. That is, the regeneration mode is entered every predetermined time (for example, 0.5 to 1 / day), the backwash pump 14 is driven, and the treated water stored in the treated water tank 6 is supplied to the activated carbon filtration device 58. After backwashing, it is washed with water after a lapse of a predetermined time to remove foreign matters such as dust adhering to the activated carbon and regenerated.

  In addition, the reproduction processing signal is transmitted to the first control unit 62 of the control block 61 via the first control line 60, and the first control unit 62 that has received the reproduction processing signal transmits to the second control unit 49. The operation permission signal 33 is invalidated and the operation of the water supply processing block 46 is stopped.

  And also in this 4th Embodiment, the 1st control part 62 respond | corresponds to the water supply request | requirement signal 32 from the 2nd control part 49 in the 1st control part 62 similarly to the 1st-3rd embodiment. When the vehicle is in an operable state, the operation permission signal 33 is always transmitted to the second control unit 49. If the second control unit 49 determines that water supply is necessary and the operation permission signal 33 from the first control unit 62 is valid, the second control unit 49 transmits the water supply request signal 32 to the first control unit 62. That is, after the second control unit 49 confirms reception of the operation permission signal 33 from the first control unit 62, the second control unit 49 only transmits the water supply request signal 32 to the first control unit 62. Thus, each component of the water supply processing block 46 can pass water. In other words, the pretreatment block 57 acts like a virtual pump on the water supply processing block 46, and raw water is supplied to the water supply processing block 46. And the raw | natural water supplied to the water supply process block 46 turns into the treated water in which sodium hypochlorite was inject | poured by the hyponitrogen injection apparatus 20 as needed through the soft water apparatus 3 and the RO apparatus 5. 6 is stored.

  FIG. 6 is a system configuration diagram showing a fifth embodiment of the water treatment system according to the present invention. In this fifth embodiment, the water supply treatment block 63 functions as an alternative to the water softener. A dispersant injection device 64 is provided on the water supply line 16.

  That is, the dispersant injecting device 64 is provided on the water supply line 16 at the front stage of the hardness monitoring device 18. The dispersant injection device 64 stores a scale dispersant such as a carboxylic acid polymer or a phosphinocarboxylic acid polymer. When it is difficult to arrange the water softener due to the installation space or the like, the dispersant injection device 64 can be provided on the water supply line 16.

  Further, the dispersant injection device 64 is electrically connected to the second control unit 66 of the control block 65 via the second control line 67. Then, when the water supply request signal 32 is valid, the second control unit 66 appropriately issues a dispersant injection command into the raw water to the dispersant injection device 64. Further, the dispersant injection device 64 is provided with a level sensor (not shown), and when the storage amount of the dispersant reaches a predetermined lower limit value, a level lowering signal is transmitted to the second control unit 66, and this is indicated. A warning light or warning sound is notified to the user and a notice is given that the dispersant should be replenished.

  Also in the fifth embodiment, as in the first to fourth embodiments, the first control unit 62 is configured so that the preprocessing block 57 responds to the water supply request signal 32 from the second control unit 66. When the vehicle is in an operable state, the operation permission signal 33 is always transmitted to the second control unit 66. If the second control unit 66 determines that water supply is necessary and the operation permission signal 33 from the first control unit 62 is valid, the second control unit 66 transmits the water supply request signal 32 to the first control unit 62. That is, after the second control unit 66 confirms reception of the operation permission signal 33 from the first control unit 62, the second control unit 66 only transmits the water supply request signal 32 to the first control unit 62. Thus, each component of the water supply processing block 63 can pass water. In other words, the pretreatment block 57 acts like a virtual pump on the water supply processing block 63, and raw water is supplied to the water supply processing block 63. The raw water supplied to the water supply processing block 63 is stored in the treated water tank 6 through the RO device 5 after the dispersant is injected by the dispersant injection device 64.

  FIG. 7 is a system configuration diagram showing a sixth embodiment of the water treatment system according to the present invention. In this sixth embodiment, the pretreatment block 68 is used as a regenerative filtration device for removing iron and removing. In addition to the manganese filtration device 2 and the activated carbon filtration device 58, the sand filtration device 69 is provided, and the water supply treatment block 70 includes three RO devices (first to third RO devices 71 a to 71 c) on the water supply line 16. Are arranged in parallel.

  That is, the sand filtration device 69 is disposed on the water supply line 9 between the residual chlorine monitoring device 12 and the activated carbon filtration device 58, and the second branch line 72 is further branched from the branch line 59 from the backwash pump 14. Is connected to the backwash pump 14.

  The sand filtration device 69 contains filter sand (anthracite as required), and removes suspended substances contained in the raw water. In addition, the sand filtration device 69 has a built-in timer as in the case of the iron removal / manganese removal filtration device 2 and the activated carbon filtration device 58, and performs a regeneration process by periodically blocking the supply of raw water. That is, the regeneration mode is entered every predetermined time (for example, 0.5 to 1 / day), the backwash pump 14 is driven, and the treated water stored in the treated water tank 6 is supplied to the sand filter 69. After backwashing, it is washed with water after a lapse of a predetermined time to regenerate filter media such as filter sand.

  Further, the regeneration processing signal is transmitted to the first control unit 75 of the control block 74 via the first control line 73, and the first control unit 75 that has received the regeneration processing signal invalidates the operation permission signal 33, The second control unit 76 commands the operation stop of the water supply processing block 65 via the second control line 77 until the operation permission signal 33 becomes valid.

  Also in the sixth embodiment, as in the first to fifth embodiments, the first control unit 75 has the preprocessing block 68 in response to the water supply request signal 32 from the second control unit 76. When the vehicle is in an operable state, the operation permission signal 33 is always transmitted to the second control unit 76. If the second control unit 76 determines that water supply is necessary and the operation permission signal 33 from the first control unit 75 is valid, the second control unit 76 transmits the water supply request signal 32 to the first control unit 62. That is, after the second control unit 76 confirms reception of the operation permission signal 33 from the first control unit 75, the second control unit 76 only transmits the water supply request signal 32 to the first control unit 75. Thus, each component of the water supply processing block 70 can pass water. That is, the pretreatment block 68 acts like a virtual pump on the water supply processing block 70, and raw water is supplied to the water supply processing block 70. The raw water supplied to the water supply treatment block 70 passes through the soft water device 3 and the RO device 5, and sodium hypochlorite is injected by the hypo-subject injection device 20 as necessary to become treated water tank. 6 is stored.

  As shown in the first to sixth embodiments, the water treatment system according to the present invention includes a first water supply request signal and an operation permission signal for the first controller and the second controller that constitute the control block. By linking, both can be designed independently and variations of various combinations can be easily made. Therefore, individual development costs can be greatly reduced as compared with the case where the entire water treatment system is controlled collectively.

  Moreover, it is easy to realize high value-added control by linking various sensors and membrane filtration devices installed in the piping, realizing a highly convenient water treatment system without incurring significant costs. can do.

  Furthermore, since it is possible to communicate with both the first control unit and the second control unit via the first and second communication lines with the external communication device, a command is issued from the external communication device to the first and second control units. It is also possible to transmit, and a more convenient water treatment system can be realized.

  In addition, as described above, the first control unit and the second control unit are separately designed independently and are controlled in cooperation with each other. Therefore, the communication protocol is used between the first communication line and the second communication line. Even if they are different from each other, the system control is not hindered and a water treatment system with more versatility can be realized.

  The present invention is not limited to the above embodiment. In the above embodiment, RO membranes are used for all membrane filtration devices. However, the processing operations of MF devices equipped with MF membranes, UF devices equipped with UF membranes, and UF devices equipped with NF membranes are substantially the same. Needless to say, it is possible to realize a control system in which the preprocessing block is a virtual pump.

  In each of the above embodiments, regeneration of the regenerative filtration apparatus is performed using treated water stored in the treated water tank. However, depending on the quality of the raw water, it may be back-washed with the raw water.

  In the above-described embodiment, both the first and second control units can communicate with the external communication device via the first and second communication lines. It may be possible to communicate with only one of the control units.

1 is a system configuration diagram showing an embodiment (first embodiment) of a water treatment system according to the present invention. It is a block block diagram which shows the detail of the control system of 1st Embodiment. It is a system configuration figure showing a 2nd embodiment of the water treatment system concerning the present invention. It is a system configuration figure showing a 3rd embodiment of the water treatment system concerning the present invention. It is a system configuration figure showing a 4th embodiment of a water treatment system concerning the present invention. It is a system configuration figure showing a 5th embodiment of a water treatment system concerning the present invention. It is a system configuration figure showing a 6th embodiment of a water treatment system concerning the present invention.

Explanation of symbols

1 Raw water pump 2 Iron / manganese filter (regenerative filter)
3, 52 Soft water device 4, 45, 53, 57, 68 Pretreatment block 5, 71a-71c RO device (membrane filtration device)
6 Treated water tank 7, 46, 63, 70 Water supply treatment block 8, 55, 61, 65, 74 Control block (control means)
11 Sub-injection device (first drug injection means)
12 Residual chlorine concentration monitoring device (first monitoring means)
14 Backwash pump (backwash means)
17 Reducing agent injection device (second drug injection means)
18 Raw water hardness monitoring device (second monitoring means)
20 Sub-injection device (second drug injection means)
26 Separate lines 29, 48, 56, 62, 75 First controller 31, 49, 66, 76 Second controller 32 Water supply request signal 33 Operation permission signal 34 Abnormal detection signal 58 Activated carbon filtration device 64 Dispersant injection device (Second drug injection device)
69 Sand filter (regenerative filter)

Claims (11)

A pretreatment block including at least a raw water pump and a regenerative filtration device as components;
A water supply treatment block including a membrane filtration device for treating the treated water supplied from the pretreatment block and a treatment water tank for storing treated water that has passed through the membrane filtration device, and having a function of adjusting the amount of water supply When,
In a water treatment system comprising control means for controlling the pretreatment block and the water supply treatment block,
The control means is classified into a first control unit that controls each component of the pretreatment block and a second control unit that controls each component of the water supply processing block,
The first control unit and the second control unit are electrically connected ,
Before the first control unit SL transmits the operation permission signal for permitting operation of each component of the water supply processing block to the second control unit,
Before Stories second control unit is configured to when receiving the operation permission signal, the water treatment system of the water supply request signal and transmits to the first control unit that requests the water supply from the pre-processing block . The first control unit detects an abnormality of each component of the preprocessing block, and an abnormality is detected in the second control unit when an abnormality of any component is detected by the abnormality detection unit. An abnormality notification means for notifying
When the second control unit receives a signal from the abnormality notifying unit, the second control unit includes a replenishing unit that enables replenishment of water to the treated water tank via another path other than the pretreatment block. The water treatment system according to claim 1.   The said 1st control part is provided with the invalid means which invalidates the said operation permission signal, when any component of the said pre-processing block forcibly stops water supply. Or the water treatment system of Claim 2.   The control unit according to any one of claims 1 to 3, wherein at least one of the first control unit and the second control unit is connected to an external communication device. Water treatment system.   The regenerative filtration device includes any one of iron removal / manganese filtration device, sand filtration device, activated carbon filtration device, and a combination thereof. The water treatment system according to crab.   The pretreatment block includes a first chemical injection means for injecting a chemical containing at least a chlorine-based compound, a first monitoring means for monitoring the residual chlorine concentration, and backwash for regenerating and regenerating the regenerative filtration device. The water treatment system according to any one of claims 1 to 5, wherein any one of the means and a combination thereof is included.   The membrane filtration device includes one of a microfiltration device, an ultrafiltration device, a nanofiltration device, a reverse osmosis filtration device, and a combination thereof. The water treatment system in any one.   The water supply processing block includes any one of a second monitoring unit that monitors hardness, a second chemical injection unit that injects a chemical containing any one of a reducing agent and a chlorine compound, and a combination thereof. The water treatment system according to any one of claims 1 to 7, wherein the water treatment system is provided.   The water treatment system according to claim 6 or 8, wherein the medicine contains a dispersing agent for dispersing a hardness component.   The water treatment system according to any one of claims 1 to 9, wherein a water softener is provided in any one of the pretreatment block and the water supply treatment block.   The second control unit includes delay means for delaying the operation start timing and operation stop timing of the water supply processing block by a predetermined time from the operation start timing and operation stop timing of the pretreatment block. The water treatment system according to any one of claims 1 to 10.

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