JP2006061844A - Scale recovery device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable the easy recovery of scales adhering to an electrode cover and the like. <P>SOLUTION: A scale recovery device comprises a device body for passing water to be treated, an intake hose connected to the water intake side of the device body, a drain hose connected to the discharge side of the device body, a control unit connected to the device body for controlling an electrode part, an intake pump, and a drainage pump, a support plate vertically attached to the inner wall of the device body, the intake pump detachably attached to the support plate for taking the water to be treated into the device body through the intake hose, the drainage pump detachably attached to the support plate for discharging the water to be treated from the device body through the drain hose, the electrode part detachably attached to the support plate, and a scale recovery container attached through a hock installed on an electrode cover support plate of an electrode cover support member for supporting the electrode part. By reversing the polarity of the electrode part, the scale adhering to the electrode cover is peeled off and removed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a scale recovery device that can easily recover a scale of an inorganic substance or the like attached to an electrode cover or the like.

  The present applicant electrolyzes water to be treated such as industrial water stored in a storage tank with an electrode device composed of an electrode and an electrode cover, and scales of inorganic compounds such as red rust and silica / magnesium in the water to be treated. Has previously proposed a photocatalytic water treatment apparatus that mainly collects and recovers water on an electrode cover or the like (Japanese Patent Application No. 2003-169208).

  However, this photocatalyst water treatment device artificially removes and removes the scale of inorganic compounds such as red rust and silica / magnesium attached to the electrode cover, etc., or removes the electrode cover with hydrochloric acid, sulfuric acid, etc. It was necessary to immerse in an acidic solution to soften and remove the red rust and scale adhering to the electrode cover.

  On the other hand, as a method for preventing water-based scale, a method is known in which the hardness component adhering to the electrode is peeled off by reversing the polarity of the electrode, and the peeled hardness component is removed by a subsequent recovery and removal means (Patent Document) 1).

  Further, as a sterilization method and a sterilization apparatus for preventing the water quality of treated water, that is, PH, from changing, a method and an apparatus for switching the polarity of a power source and inverting an anode and a cathode of an electrode are known (Patent Literature). 2).

Furthermore, as an ionic water generating apparatus that does not perform useless reverse electric cleaning, there is known an ionic water generating apparatus provided with a time measuring means for measuring the use time of an electrolytic cell and the energization time of an electrode (see Patent Document 3). .
JP 2001-259690 A JP-A-6-343967 JP 2003-251347 A

  However, these methods are methods in which the polarity of the electrode is reversed and the hardness component attached to the electrode is peeled off. Therefore, in order to remove and collect the scale of the hardness component, it is necessary to provide a sedimentation tank and a filter. As a result, there is a drawback that the equipment cost is increased and the cost is increased.

  Furthermore, there is a demand for equipment that requires high labor costs for maintaining these facilities and that facilitates maintenance such as periodic inspections due to lack of labor.

  The present invention makes it easy to maintain and regularly check the equipment, eliminates the need for manual maintenance, and can easily recover scales of inorganic compounds such as red rust and calcium / magnesium adhering to electrode covers. An object of the present invention is to provide a scale recovery device.

The configuration of the first invention of the present invention is a scale recovery device for recovering an inorganic substance in treated water,
An apparatus main body for passing the water to be treated;
A water intake hose connected to the water intake side of the apparatus body,
A drainage hose connected to the discharge side of the apparatus body,
A control unit connected to the apparatus main body, for controlling the electrode unit, the water intake pump and the drainage pump;
A support plate vertically attached to the inner wall of the apparatus main body,
A water intake pump that is detachably attached to the support plate, and draws water to be treated into the apparatus main body through the water intake hose;
A drainage pump that is detachably attached to the support plate, and that discharges water to be treated from the apparatus main body through the discharge hose;
An electrode part detachably attached to the support plate;
A scale collection container attached via a hook provided on an electrode cover holding plate of an electrode cover holding member for holding the electrode part;
The scale attached to the electrode cover of the electrode part is peeled and removed by inverting the polarity of the electrode part.

The structure of the second invention of the present invention is the structure of the first invention,
The control unit includes a manual electrode polarity changeover switch and / or timing means for measuring the energization time to the electrode unit, a control circuit for controlling the electrode unit, the water intake pump and the drainage pump, and the polarity of the electrode unit And a polarity switching circuit for switching between.

  The configuration of the third invention of the present invention is the configuration of the second invention, wherein the polarity switching circuit has reached a predetermined time set in advance for energization time to the electrode portion measured by the time measuring means. The polarity of the electrode part is reversed, and the polarity of the electrode part is not reversed when the energization time to the electrode part has not reached a predetermined time.

  According to a fourth aspect of the present invention, there is provided the structure according to any one of the first to third aspects, wherein the electrode portion is made of zinc, magnesium alloy, copper, iron, stainless steel, titanium alloy, aluminum alloy, platinum It comprises two or more electrodes consisting of any one or two or more and an electrode cover that covers the electrodes.

  According to a fifth aspect of the present invention, in the first configuration, the electrode cover holding member is attached to the electrode cover holding plate, a hook support provided on the electrode cover holding plate, and the hook support. And an electrode cover support bar fixed to the electrode cover holding plate and sandwiching the electrode cover, and an electrode cover fastener for fixing the electrode cover and the electrode cover support bar.

  According to a sixth aspect of the present invention, in the first or sixth aspect, the scale collection container is detachably supported by the electrode cover holding plate via the hook. To do.

  According to a seventh aspect of the present invention, in the first, fifth or sixth aspect of the invention, the scale collection container is a bottomed container having a net having an open upper end and a side mesh. It is characterized by being.

  According to an eighth aspect of the present invention, in the first, sixth or seventh aspect of the invention, the scale collection container has a net mesh size of 1 to 25 mesh. Features.

  According to the present invention, there is provided a scale recovery device that can easily recover scales of inorganic compounds such as red rust and calcium / magnesium adhered to an electrode cover or the like.

  Embodiments of the present invention will be described in detail with reference to the drawings.

(Configuration of the main body of the scale recovery device excluding the control unit)
First, with reference to FIG. 1, the structure of the apparatus main body part of the scale collection | recovery apparatus to which this invention is applied is demonstrated. FIG. 1 is a schematic diagram of an apparatus main body 2 of a scale recovery apparatus 1 excluding a control unit according to an embodiment of the present invention, and shows a case where industrial circulating water is treated as treated water 100.

  As shown in FIG. 1, the apparatus main body 2 of the scale recovery apparatus 1 of the present embodiment is connected to the water intake hose 3 connected to the water intake side of the apparatus main body 2 and the discharge side of the apparatus main body 2. The drainage hose 9, the support plates 5A and 5B provided perpendicularly to the inner wall of the apparatus main body 2 and the support plate 5A are detachably attached, and the treated water 100 is taken in via the water hose 3. The water intake pump 4 is attached to the support plate 5B in a detachable manner, and the water pump 8 discharges the treated water 100 from the apparatus main body 2 through the discharge hose 9, and the treated water 100 is electrically connected. It is attached via an electrode portion 6 for disassembly and a hook 6J provided below the electrode cover holding plate 6F, which will be described later, and has a substantially cylindrical shape with an open top, and collects the scale attached to the electrode cover. Bottomed scale And a le collection container 7. That is, in the apparatus main body 2 of the scale recovery apparatus 1, the electrode section 6, the water intake pump 4, and the drainage pump 8 can be attached to and detached from the support plates 5 </ b> A and 5 </ b> B provided perpendicular to the inner wall of the apparatus main body 2. It is attached to and has a structure arranged.

  The apparatus main body 2 of the scale recovery apparatus 1 is a stainless steel housing provided with a water intake hose 3 for taking in the water 100 to be treated and a water discharge hose 9 for discharging. The water intake pump 4, the water pump 8, and the electrode 6 are provided internally. The power cord 20 of the electrode unit 6, the water intake pump 4, and the drainage pump 8 is connected to a control unit 30 described later, and a control panel (not shown) is provided on the front surface of the control unit 30.

  The water intake pump 4 includes a motor, a rotary blade, and the like (not shown), and operates so that the water 100 to be treated is sucked through the water hose 3 and flows into the water intake side of the apparatus main body 2.

  The water intake pump 4 controls the flow rate of the water 100 to be treated by adjusting the output of the motor by operating a flow rate control button (not shown) provided on the control panel described above. The water 100 to be treated is caused to flow to the apparatus main body 2.

  The drainage pump 8 includes a motor (not shown), rotating blades, and the like, and operates to suck and discharge the water 100 to be treated in the apparatus main body 2 through the drainage hose 9.

  As with the water intake pump 4, the drainage pump 8 adjusts the output of the motor by operating a flow rate control button (not shown) provided on the above-mentioned control panel, so that the processing target from the apparatus main body 2 is processed. The flow rate of the water 100 is controlled, and the treated water 100 is discharged through the drainage hose 9.

  The intake pump 4 and the drainage pump 8 may be anything as long as they provide energy for supplying and draining the treated water 100 into the apparatus main body 2. The performance of the water intake pump 4 and the drainage pump 8 may be appropriately determined according to conditions such as the amount of electrolysis treatment per hour of the electrode, the type of scale to be decomposed, and the content.

  In the present embodiment, the intake pump 4 and the drainage pump 8 are mounted and used on the support plates 5A and 5B provided perpendicularly to the inner wall of the apparatus main body 2. However, for example, screws and bolts are used. It may be detachably attached by tightening.

  In the scale recovery device 1, as shown in FIG. 1, a water intake hose 3, a drain hose 9, an electrode portion 6, a water intake pump 4, and a water discharge pump 8 are provided on support plates 5A and 5B, respectively, in the device main body 2. It is attached and has a built-in configuration. Here, the electrode 6, the water intake pump 4, and the drainage pump 8 are mounted on support plates 5 </ b> A and 5 </ b> B having the same height provided perpendicularly to the inner wall of the apparatus main body 2.

  The support plates 5A and 5B may be any plate as long as the electrode unit 6, the water intake pump 4 and the drainage pump 8 can be placed or held on the support plate 5A, 5B, and any shape can be selected. For example, the center is integrated with a hole. It is also possible to use an integrated rectangular plate with a hole in the center or a plate obtained by dividing the rectangular plate into two.

  Also, the bottomed scale collection container 7 having a substantially cylindrical shape with the upper end opened is engaged with a hook 6J via a hook support 6I fixed with a screw or the like under the electrode cover holding plate 6F. It has become. The scale collection container 7 is a bottomed container having an opening at the upper end and having a mesh on the side, and a bottom portion having a plate shape, and water is passed from the net having a mesh on the side.

  Examples of the material for the scale collection container 7 include acrylic resin, vinyl chloride resin, polypropylene, polycarbonate, PET resin, vinylidene chloride resin, fluorine resin, melamine resin, phenol resin, unsaturated polyester resin, and urethane resin. It is not limited.

  The scale collection container 7 preferably has a net mesh size of 1 to 25 mesh. If the mesh size of the net is coarser than 1 mesh, a scale having a small diameter cannot pass through the mesh of the scale collection container 7 and cannot be recovered. If the mesh size of the net is smaller than 25 mesh, the scale adheres to the outer mesh of the scale collection container 7 and the flow of the water 100 to be treated passing through the mesh of the scale collection container 7 becomes worse, so that water treatment can be performed. Disappear.

  At the time when the scale collection container 7 is taken out by forming a net having a mesh that does not allow the scale to permeate through the side surface of the scale collection container 7 and making the bottom plate like a plate. The treated water 100 in the scale collection container 7 is removed, and the scale condensed and precipitated in the scale collection container 7 can be easily collected.

  Further, when discharging the water 100 to be treated through the drain hose 9, the mesh of the pores is about 60 to 200 mesh at the inlet of the drain hose 9 so as not to discharge the scale that has condensed and settled at the bottom of the apparatus main body 2. You may provide the filter of the nonwoven fabric formed with the polypropylene fiber.

  Next, FIG. 2 is a control block diagram of the control unit 30 in the scale recovery apparatus.

(Configuration of control unit)
As shown in FIG. 2, the control unit 30 includes a manual electrode polarity switching switch and / or an electrode polarity switching timer that is a time measuring unit, an energization amount of the electrode unit 6, control of overcurrent protection, control of electrode polarity reversal, and a water intake pump. 4 and a control circuit for controlling the electrical system of the drainage pump 8, and a polarity switching circuit for inverting the polarity of the voltage applied to each electrode and the electrode cover in the frequency range of 50 to 70 kHz. Yes.

  This control circuit controls the start and stop of electrolysis in response to the operation of the power switch of the electrode section 6, and measures the energization time and polarity inversion time to each electrode and electrode cover by the electrode polarity switching timer. To do.

  In addition, the control circuit operates the water intake pump 4 every time a predetermined time elapses to send a predetermined amount of the water 100 to be treated to the apparatus main body 2 via the water intake hose 3, and the process main body 2 is treated. Filled with water 100.

  Further, every time a predetermined time elapses, the control circuit operates the drainage pump 8 to return the treated water 100 to the treated water 100 through the drainage hose 9 by a predetermined amount.

  After power is turned on to the control unit 30 (plug is inserted into an outlet), a main power switch provided on the control panel is turned on, so that a high-frequency AC voltage generator (not shown) as voltage application means and water intake Each power switch of the pump 4 and the drainage pump 8 can be turned on.

  Further, the control unit 30 is provided with a manual electrode polarity changeover switch and / or time measuring means for measuring the energization time and polarity reversal time to the electrode section, that is, an electrode polarity changeover timer is provided in the control panel.

  And when the energization time to the electrode part measured by the manual electrode polarity changeover switch and / or the time measuring means has reached a predetermined time set in advance, the polarity of the electrode part is reversed, and the electrode part When the energization time to the electrode does not reach a preset time, the polarity switching circuit that does not invert the polarity of the electrode unit and the voltage applied to the electrode unit to invert in the frequency range of 50 to 70 kHz Control circuit.

  Further, the control unit 30 can adjust the AC power supply output supplied to the intake pump 4 and the drainage pump 8, and includes inverter control means for adjusting the outputs of the intake pump 4 and the drainage pump 8.

  The control unit 30 is provided with a power switch for operating the water intake pump 4 and the water discharge pump 8 on the control panel, respectively. It may be provided on the control panel.

(Details of electrode part)
Next, the configuration of the electrode unit 6 will be described in detail with reference to FIGS. 3 and 4. Here, FIG. 3 is a schematic front view of the electrode unit 6 in the scale recovery apparatus 1. FIG. 4 is a schematic bottom view of the electrode unit 6 in the scale recovery apparatus 1.

  As shown in FIG. 3, the outside of the electrode portion 6 is composed of an electrode cover 6D, an electrode cover holding plate 6F, an electrode cover support bar 6G, and an electrode cover fastener 6H. The electrode cover 6D is an electrode cover holding plate. It is clamped by two electrode cover support rods 6G fixed to 6F, and fixed by screws with an electrode cover fastener 6H. The hook 6J is engaged with a hook support 6I fixed with a screw or the like under the electrode cover holding plate 6F, and is swingable with the screw or the like. In addition, three electrodes 6A, 6B, and 6C, which will be described later, are arranged in the vertical direction via the power cord 20 inside the electrode portion 6.

  Specifically, the electrode cover 6D has a substantially cylindrical shape as a whole and is provided with a number of punched through holes for allowing water to circulate at equal intervals. The electrode cover 6D is covered so that each electrode is covered in the longitudinal direction. For this reason, at least the surface of the electrode cover 6D is made of an insulating material that is insulated from the electrode. For example, synthetic resin is preferably used as the material.

  However, the electrode cover 6D is grounded so as not to be electrically connected to the electrode, so that the electrode cover 6D itself functions as a cathode, thereby collecting the scale and reducing the scale attached to the electrode. It is done. Therefore, in this case, it is preferable to use a metal as the material of the electrode cover 6D, and more preferably, stainless steel, titanium or the like having excellent rust prevention properties is used. When the material of the electrode cover 6D is a metal, an insulating layer may be appropriately formed by applying a paint or the like on a portion that needs to be insulated from the electrode on the cover surface.

  The electrode cover 6D has a function of fixing the arrangement of each electrode and protecting it from damage caused by a collision impact, and prevents adhesion of inorganic compound scales such as red rust and calcium / magnesium to each electrode. It also has functions.

  The electrode cover holding member 6E is composed of one substantially disk-shaped electrode cover holding plate 6F, two columnar electrode cover support rods 6G, and an electrode cover fastener 6H, and the electrode cover holding plate 6F. The upper end of the electrode cover 6D is sandwiched and fixed on both sides of the electrode cover 6D by two cylindrical electrode cover support rods 6G and an electrode cover fastener 6H. When the electrode unit 6 is installed in the apparatus main body 2, the electrode cover holding member 6 </ b> E is hooked on the support plates 5 </ b> A and 5 </ b> B of the apparatus main body 2 by the substantially disk-shaped electrode cover holding plate 6 </ b> F. Then, by tightening screws and bolts, the substantially disc-shaped electrode cover holding plate 6F of the electrode cover holding member 6E is detachably attached to the support plates 5A and 5B, and the electrode portion 6 is fixed so as not to move. ing.

  Next, as shown in FIG. 4, the three first electrodes 6A, the second electrode 6B, and the third electrode 6C are arranged at an equal angle of 120 ° in the radial direction inside the electrode cover 6D. The electrodes are respectively disposed, and the two cylindrical electrode cover support rods 6G and the electrode cover fastener 6H are opposed to each other so as to sandwich and fix both sides of the electrode cover 6D. Further, the hook 6J is attached and arranged on the two hook supports 6I so as not to overlap the positions of the two columnar electrode cover support bars 6G.

  The electrode section 6 includes the three first electrodes 6A, the second electrode 6B, the third electrode 6C, and an electrode cover 6D that covers the electrodes. The electrode cover holding member 6E includes an electrode cover holding plate 6F, a hook support 6I provided on the electrode cover holding plate 6F, a hook 6J attached to the hook support 6I, and the electrode cover holding plate. An electrode cover support bar 6G that is fixed to 6F and sandwiches the electrode cover 6D, and an electrode cover fastener 6H that fixes the electrode cover 6D and the electrode cover support bar 6G. In addition, the three first electrodes 6A, the second electrode 6B, the third electrode 6C, and the electrode cover 6D are in a state of being close to each other, and the substantially disk-shaped electrode cover holding plate 6F of the electrode cover holding member 6E. Removably attached to.

  For example, zinc, magnesium alloy, copper, iron, stainless steel, titanium alloy, aluminum alloy, or platinum is used for each electrode of the electrode unit 6. As an electrode for lowering the oxidation-reduction potential, the reduction of the oxidation-reduction potential is observed when any of these metals is used, but the electrode obtained by applying platinum plating to a titanium alloy is more remarkable. Further, the shape of the electrode may be any of a plate shape, a rod shape, and a cylindrical shape, and the number of electrodes may be two or more.

  Next, the container of FIG. 5 is a schematic perspective view showing the scale collection container 7 of one embodiment, which is a net having an opening at the upper end, a side having a mesh, and a bottom portion having a plate shape. The container.

  Further, FIG. 6 shows an electric circuit diagram of a control unit in the scale recovery device, wherein 2 is an apparatus main body, 100 is treated water, and 6A, 6B, and 6C are first and second disposed in treated water. The third electrode is disposed on the apparatus main body 2 as shown in the figure. Reference numeral 6D denotes an electrode cover that covers the three electrodes 6A, 6B, and 6C.

  Reference numeral 35 denotes an AC power source of 10V to 50V, and 36A and 36B are connected to the AC power source 35 via a variable resistor 37, respectively, and the AC power source 35 converts the first and second electrodes 6A, These are first and second high-frequency switches that are alternately applied to 6B. These first and second high-frequency switches 36A and 36B are constituted by transistors 38A and 39A and 38B and 39B. Reference numeral 40 denotes a capacitor connected between the first and second electrodes.

  Reference numeral 41 denotes a high-frequency switching command circuit comprising a circuit for giving a high-frequency switching command to the first and second high-frequency switches 36A and 36B via the resistors 42A and 42B, and 43 is a high-frequency oscillator that generates a high-frequency signal of 50 KHz to 70 KHZ. .

  43A and 43B are the emitters of grounding transistors 43A and 43B that perform switching so that the bases of the transistors 38A and 39A and the transistors 38B and 39B of the first and second high-frequency switches 36A and 36B are alternately grounded in a low cycle. This is a diode connected between ground via a common variable resistor 45.

46 provides a high frequency signal 50KHz~70KHz high frequency oscillator 43, for example, 1/2 ¹⁴ by dividing the low-frequency signal formed by resistors 47A, through 47B each grounding transistors 43A, 43B, based flip This is a low frequency signal generator comprising a circuit.

50 a high frequency signal 50KHz~70KHz high frequency oscillator 43, for example, 1/2 ¹⁴ frequency-divided to a low-frequency switching command resistor 51A, a low-frequency switching command circuit for providing via 51B low-frequency switches 53A, the 53B It is. 52A and 52B are resistors for connecting the collectors of the polarity changeover switches 101 and 102 made of transistors to the positive side of the DC power supply to hold the third electrode or the electrode covers 6C and 6D at a positive potential when the switch is turned off. Reference numerals 101 and 102 denote polarity changeover switches for grounding the third electrode 6C and the electrode cover 6D alternately at a low cycle.

  A high-frequency alternating current whose peak values are periodically asymmetric is applied to the first and second electrodes 6A and 6B.

  On the other hand, a low frequency signal is given to the polarity changeover switches 101 and 102 by the low frequency changeover command circuit 50, and these polarity changeover switches 101 and 102 are alternately turned on at a low frequency, thereby the third electrode 6C or the electrode cover. 6D is grounded alternately. The electrode 6C or the electrode cover 6D that is turned off is held at a positive potential via the resistor 52A or 52B.

  If it does in this way, direct current will flow alternately to the 3rd electrode 6C or electrode cover 6D from the 1st and 2nd electrodes 6A and 6B to which the high frequency alternating current with which the peak value is periodically asymmetric is impressed.

  Further, when the electrode cover 6D that is not grounded is set to a positive potential, the adhesion of scales such as calcium to the electrode surface can be prevented, and maintenance is facilitated.

  In this case, a signal in which a wide pulse and a narrow pulse are adjacent to each other is obtained from the OR circuit, and the narrow pulse is extracted at every time determined by the timer, and these signals are extracted from the first and second high-frequency switches 36A and 36B. Thus, a high frequency alternating current in which the positive wave number and the negative wave number are unbalanced is formed at regular intervals and applied to the first and second electrodes 6A and 6B. In this case, the peak value of the AC waveform is set by the variable resistor 45. Further, the timing of the waveform having a small wave number on the plus side or the minus side is set by the variable resistor 45.

  In this way, the same effect can be obtained even when a high-frequency alternating current in which the positive wave number and the negative wave number are unbalanced is applied to the first and second electrodes 6A and 6B at regular intervals.

  Note that the third electrode 6C and the electrode cover 6D can be provided and grounded alternately at a low cycle, and the non-grounded electrode 6C or the electrode cover 6D can be held at a positive potential.

  In the above embodiment, the case where a high-frequency alternating current is applied to the first and second electrodes 6A and 6B has been described. However, a low-frequency alternating current is applied to the first and second electrodes 6A and 6B. However, the same effect can be obtained. However, when AC is applied and used, a higher frequency is preferable because there is no electric shock to the human body.

  Here, the AC power supply 35 selects the output voltage value in the range of 10V to 50V according to the type and application of the water to be treated by operating the flow volume provided on the control panel. It can be adjusted.

  Next, FIG. 7 is a schematic diagram showing a configuration in which the scale collection device 1 according to the embodiment of the present invention is arranged by inserting a hose into a cooling tower 10 in a factory and connecting it.

(Configuration in which the scale recovery device is arranged in the cooling tower)
As shown in FIG. 7, the scale recovery device 1 of the present embodiment has a configuration that is disposed in a cooling tower 10 for cooling industrial circulating water installed in a factory. That is, in this embodiment, a factory circulation path (not shown) for circulating the water 100 to be treated is provided, and the cooling tower 10 is provided between the circulation paths. And the to-be-processed water 100 circulates in this circulation path, and is used as circulating water for industrial water, and is once stored in the cooling tower 10 via the intake pipe 11 connected from the circulation path. .

  The scale recovery device 1 of the present embodiment is configured to be taken into the cooling tower 10 to provide the water 100 to be treated, which is provided in the circulation path of the cooling tower 10 and stored in the cooling tower 10, with an inorganic system. An electrolysis process described below is performed to decompose the substance.

  Here, as shown in FIG. 7, the scale recovery device 1 is disposed outside the cooling tower 10, and the water intake hose 3, the device main body 2, the drainage hose 9, and the power supply cord 20 are connected to the device main body 2. And a connected control unit 30.

  As materials of the intake hose 3 and the drainage hose 9, for example, vinyl chloride, polybutene, polyester, polypropylene, marprene, polyimide, polyurethane, polyolefin, nylon, chloroprene, neoprene, silicon, fluororubber, etc. can be used. Elastic vinyl chloride is preferably used.

  As shown by the arrows in FIG. 7, first, the water 100 to be treated in the cooling tower 10 is taken through the water intake hose 3 inserted into the cooling tower 10 and supplied into the apparatus main body 2. The treated water 100 that has been water-treated by electrolysis in the scale recovery device 1 for a predetermined time is returned to the cooling tower 10 via the discharge hose 9 and is used again as circulating water via the discharge pipe 12 of the cooling tower 10. Is done. Furthermore, the treated water 100 supplied into the circulation path is used and circulated as industrial water for a predetermined period, and then stored in the cooling tower 10 via the intake pipe 11. After that, it is returned to the circulation path through the discharge pipe 12.

  Moreover, although the example which installed the scale collection | recovery apparatus 1 in the exterior of the cooling tower 10 for cooling the industrial circulating water installed in the factory was shown in FIG. 7, this invention is not limited to this, For example, it can be used for the purpose of collecting inorganic compounds at any location where water is stored, such as maintenance of a water storage tank, as a pretreatment for industrial wastewater and sewage wastewater.

  Further, as shown in FIG. 7, the power cords 20 of the electrode unit 6 and the water intake pump 4 and the drainage pump 8 are respectively connected to the control unit 30, and the energization amount of the electrode unit 6, overcurrent protection control and electrode polarity It has a control circuit for controlling the inversion and the electric system of the intake pump 4 and the drainage pump 8, and by turning on each power switch provided on the control panel, the electrode section 6 and the intake pump 4 And the drainage pump 8 are operated. The power supply supplies AC power to the electrode unit 6, the water intake pump 4, and the drainage pump 8, respectively, and supplies AC power to at least the electrode unit 6 when the apparatus is in operation.

  In the present embodiment, the apparatus body 2 and the control unit 30 are separated as described above, whereby the scale collection device 1 can be reduced in size and weight, thereby reducing the cost.

  Next, the principle of the process of the to-be-processed water 100 by the electrode part 6 is demonstrated.

  In the scale collection device 1, most of the electrode portion 6 including the first electrode 6A, the second electrode 6B, the third electrode 6C, and the electrode cover 6D is immersed, and the support plate 5A in the device main body portion 2 is immersed. Water to be treated 100 is taken into the apparatus main body 2 to a position below 5B, and a high frequency alternating current of an external power source is used between 10V to 50V between the terminals of the first electrode 6A and the second electrode 6B. Is applied to the water 100 to be treated, and positive electrons are attracted to the negative electrode.

  Then, within a few minutes after the voltage is applied, fine bubbles are generated in the water 100 to be treated, and electrolyzed water is generated on the third electrode 6C side. In the scale collection apparatus 1, the fine bubbles collide with red rust, scale, etc. adhering in the apparatus main body 2 to obtain the effect of separating the deposits (erosion effect) and the effect of condensation precipitation. .

  Moreover, according to the electrolysis process in the electrode part 6 of the scale collection | recovery apparatus 1, generation | occurrence | production of the red rust of a metal to an electrode can be prevented, and the effect of carrying out dissolution peeling and condensation precipitation of calcium, magnesium, etc. scale is acquired. .

  Furthermore, according to the scale collection | recovery apparatus 1, since the chemical | medical agent is not used, the to-be-processed water 100 can be modify | reformed with a low-cost installation.

  In addition, the electrode section 6 of the scale recovery device 1 electrolyzes the treated water 100 over a long period of time, so that calcium, magnesium, silica, potassium, sodium contained in the treated water 100 supplied between the electrodes. The scale mainly composed of, etc. is condensed and precipitated. And when electrolysis processing for a long time is performed, the turbidity of the to-be-processed water 100 becomes stable and transparent with progress of time.

In general, the scale recovery apparatus 1 provides the following effects as the inorganic compound treatment by electrolysis.
(1) Prevention of crystallization (scale) of inorganic compounds by promoting ion dissociation and sedimentation. That is, it is possible to obtain effects of suppressing hose blockage by a scale such as calcium / magnesium and softening water to be treated by promoting sedimentation.
(2) Auxiliary effect due to generation of oxidizing / reducing agent.
(3) The scale crystallization preventing action prevents the scale film from being formed on the electrode, and as a result, the life of the electrode is increased.

(Operation of the entire scale collection device, etc.)
Hereinafter, the operation | movement of the whole scale collection | recovery apparatus 1 at the time of a process water to be treated, the change of the water to be treated accompanying this, etc. are demonstrated.

  First, at the initial stage before the operation, the intake hose 3 and the drainage hose 9 are inserted into the cooling tower 10, and the apparatus main body 2 is connected to the cooling tower 10. When each power supply unit switch of the control unit 30 described above is turned on from this state, the electrode unit 6, the water intake pump 4, and the drainage pump 8 start operating.

  Then, the water intake pump 4 is operated for a predetermined time set by a timer or the like, and the water 100 to be treated in the cooling tower 10 is sucked from the cooling tower 10 and passes through the water intake hose 3 to the water intake side of the apparatus main body 2. It flows to be taken into water.

  Further, by the manual electrode polarity changeover switch and / or the time measuring means, the electrode unit 6 causes the three electrodes 6A, 6B, 6C and the electrode cover 6D to have a voltage of 10V to 50V for a predetermined time in which the energization time is set in advance. The electrolysis of the water 100 to be treated is started.

  In this way, when the electrode unit 6 is energized until a predetermined time, the inorganic substance contained in the water to be treated 100, that is, the scale is attached to the electrode cover 6D.

(For manual selector switch)
The positive polarity voltage is applied to the second electrode 6B by the next polarity switching circuit through the control circuit by the manual electrode polarity switching switch provided in the control unit 30. Here, positive polarity means that the second electrode 6B is an anode and the first electrode 6A is a cathode.

  On the other hand, calcium ions and magnesium ions that are cations are attracted to the third electrode 6C side, and a scale that is an oxide such as calcium and magnesium adheres to the third electrode 6C. By continuously applying this negative voltage, scale is deposited on the electrode cover 6D.

(For electrode polarity switching timer)
The electrode polarity switching timer provided in the control unit 30 sets the negative voltage application time of the electrode, and the electrode polarity changeover switch 101 is connected to the contact 101B and the electrode polarity via the relay circuit RL over this time. When the changeover switch 102 is connected to the contact 102B, a negative voltage is applied to the second electrode 6B and a normal operation state is obtained.

  When a predetermined negative voltage application time has elapsed, the positive voltage application time is set by the electrode polarity switching timer, and the electrode polarity switching switch 101 is connected to the contact 101A via the relay circuit RL over this time. When the electrode polarity changeover switch 102 is connected to the contact 102A, a positive voltage is applied to the third electrode 6C and the electrode cover 6D. Here, positive polarity means that the third electrode 6C and the electrode cover 6D are used as anodes, whereby the scale deposited on the electrode cover 6D is gradually peeled off.

(Scale peeling)
Thus, the scale attached to the electrode cover 6D is peeled as follows.

  In the scale recovery device 1, the polarity of the alternating current of 50 to 70 kHz high frequency is reversed to the electrodes 6A, 6B, 6C of the electrode section 6 and the electrode cover 6D so that the first electrode 6A on the negative side becomes a positive voltage. Thus, the scale can be peeled off.

  Moreover, the scale of inorganic compounds such as red rust and calcium / magnesium adhered to the electrode cover 6D of the apparatus main body 2 is dissolved and peeled off by the collision of bubbles generated by the electrochemical reaction. The dissolved and peeled scale of the inorganic compound is contained in the scale collection container 7 supported via a hook 6J engaged with a hook support 6I fixed with a screw or the like under the electrode cover holding plate 6F. It is condensed and precipitated.

  At the time of maintenance, first, the energization to the electrode unit 6 is cut off, the intake pump 4 is stopped, the supply of the treated water 100 is stopped, only the drainage pump 8 is operated, and the treated object in the scale collection container 7 is operated. Water 100 is drained. Next, the scale collection container 7 is taken out from the scale collection device 1, and the scale collection container 7 is discarded as it is or the water 100 to be treated collected in the scale collection container 7 is extracted, and the scale accumulated in the scale collection container 7 is manually removed. Remove by cleaning.

  As described above, positive voltage application and reverse polarity voltage application are alternately repeated to continue the operation.

  Moreover, in the scale collection | recovery apparatus 1, as shown by the arrow of FIG. 7, the to-be-processed water 100 in the cooling tower 10 is made to pull the intake hose 3 by forcibly attracting the to-be-processed water 100 with the intake pump 4. FIG. Then, water is taken into the apparatus main body 2, passed from the apparatus main body 2 through the drainage hose 9, and sent back into the cooling tower 10 again. Furthermore, the treated water 100 is supplied into the factory circulation path through the discharge pipe 12 of the cooling tower 10 and used as industrial water. The used treated water 100 is supplied to the cooling tower via the intake pipe 11. 10 is refluxed.

  The treated water 100 circulates in this factory circulation path during factory operation. Further, even when the water 100 to be treated is not supplied into the factory circulation path, it is possible to perform water treatment in the circulation path between the cooling tower 10 and the apparatus main body 2.

  And while the to-be-processed water circulates in the factory circulation path, the scale collection | recovery apparatus 1 decomposes | disassembles and removes the inorganic type substance of the to-be-processed water 100 in the cooling tower 10 once stored.

  Thus, the water to be treated 100 treated in the apparatus main body 2 is circulated again to the cooling tower 10, and while the apparatus main body 2 is operating, it circulates repeatedly through the above path and the above-described electrolysis treatment continues. Done. And the to-be-processed water 100 will perform solid-liquid separation easily by performing such a process, and it becomes possible to use the supernatant water of the apparatus main-body part 2 in reuse.

  Also in other fields where water treatment is performed, the scale collection device 1 does not use chemicals, and thus can more effectively purify inorganic compounds and contaminants in water.

  According to the scale recovery device 1 of the present embodiment, the polarity of the electrode is reversed by a manual electrode polarity changeover switch and / or a timer that is a time measuring means, so that red rust and scale attached to the electrode cover 6D are removed from the scale recovery container 7. Since it peels and settles inside, the performance of the electrolysis reaction by the electrode can be maintained for a long time.

  In addition, according to the scale collection device 1, the inorganic substance precipitated or deposited in the scale collection container 7 may be removed from the scale collection device 1, and cleaned and removed from time to time, so that maintenance is also possible. It becomes easy.

  Furthermore, according to the scale collection apparatus 1, since no toxic by-product is generated by chemicals or cleaning agents, the service life of the apparatus is long and the number of maintenance inspection points is reduced.

  Moreover, according to the scale collection device 1, since no chemicals or cleaning agents are required, a reaction tank for chemical treatment is not necessary, and the control unit 30 is separated, so that the scale collection device 1 can be reduced in size and weight. As a result, the cost can be reduced. Furthermore, the apparatus main body 2 and the control unit 30 can be integrated.

  In this embodiment, the treated water 100 to be treated by the scale collection device 1 is industrial circulating water. However, the treated water 100 that can be treated by the scale collection device 1 is, for example, industrial waste water. Industrial wastewater, various types of water and sewage, soil and groundwater, ponds, pools, domestic wastewater, and the like.

  Next, although an example of an experiment is given and the present invention is explained more concretely, the present invention is not limited to these examples.

  In this experiment, industrial circulating water (clean water) having a calcium ion concentration of 200 mg / L is used as the water to be treated 100, and a 10-ton open cooling tower is used as the cooling tower 10. Scale recovery was carried out at a water temperature of 18-19 ° C. In this experiment, the electrode cover 6D is made of stainless steel as the material of the electrode cover 6D, and the shape of the electrode cover 6D is 3 cylinders having a diameter of 13 cm provided with punching holes having a diameter of 8 mm. The electrode material is a metal plated with platinum on a titanium alloy, and the electrode shape is a plate-like expander having a width of 4 cm and a length of 15 to 16 cm. A value of 1.4A was applied and scale recovery was performed for 7 days. As the intake pump 4 and the drainage pump 8, an inverter controlled output 0.75 kw pump manufactured by Hitachi Ltd. was used.

  Next, after completing the water treatment, the water intake pump 4 and the drainage pump 8 are stopped in order to collect the scale attached to the electrode cover 6D, so that the water 100 to be treated is not supplied or drained into the apparatus main body 2. .

  Then, the polarity of the electrode was reversed, and an operation of peeling and removing the scale attached to the electrode cover 6D was performed.

  FIG. 8 shows the scale recovery device (hereinafter referred to as the present experimental device) configured as described above, in which the polarity of the electrode unit 6 is reversed for 48 hours under the condition of a current value of 1.4 A and the scale attached to the electrode cover 6D. It is a graph which shows the change of the peeling rate of a scale with the energization time of an electrode.

  As can be seen from FIG. 8, according to the present experimental apparatus, the scale rapidly melted by 12 hours after the start of the polarity reversal, and after 12 hours, the scale attached to the electrode cover 6D was removed. 74% peeled off, and then gradually peeled off for 12 to 48 hours. Finally, 93% of the scale attached to the electrode cover 6D could be peeled off.

  In addition, since the water to be treated 100 obtained in this experiment has a low redox potential, the electronic bond of the water to be treated itself is strong, and other substances are difficult to oxidize and become water that is good for biological reactions.

  Furthermore, according to this experimental apparatus, the effect which activates water itself and raises the washing | cleaning capability which water originally has was recognized. Here, the cleaning ability is the ability of water to dissolve the substance, and the higher the cleaning ability, the longer the time during which the dirt component is dissolved in the water.

  In addition, according to this experimental apparatus, by performing the polarity reversal process by the electrode unit 6, calcium and magnesium are precipitated and deposited in the scale collection container 7, so that they do not adhere to the electrode cover 6D. It was. As a result, the scale of inorganic compounds such as red rust and calcium / magnesium that could not be removed by adhering to the electrode cover 6D in the conventional water treatment method can be almost completely removed, and the water treatment is extremely effective. It became possible to do.

  This also confirms that the scale of the inorganic compound such as red rust, calcium and magnesium has settled in the scale collection container 7 of the apparatus body 2, and the scale collection container 7 can be easily removed from the apparatus body 2. The scale that has settled in the scale collection container 7 can be easily collected.

It is the schematic of the apparatus main-body part of the scale collection | recovery apparatus except the control unit of this invention. It is a control block diagram of the control unit in the scale collection | recovery apparatus of this invention. It is a schematic front view of the electrode part in the scale collection | recovery apparatus of this invention. It is a schematic bottom view of the electrode part in the scale collection | recovery apparatus of this invention. It is a schematic perspective view of the scale collection container in the scale collection device of the present invention. It is an electric circuit diagram of the control unit in the scale collection | recovery apparatus of this invention. It is the schematic which shows the structure which has arrange | positioned the scale collection | recovery apparatus which is embodiment of this invention in the cooling tower in a factory. It is a graph which shows the change of the peeling rate of a scale with the energization time of the electrode attached to the electrode cover.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ......... Scale collection apparatus 2 ......... System unit part 3 ......... Intake hose 4 ......... Intake pump 5A, 5B ......... Support plate 6 ......... Electrode part 6A ......... First electrode 6B ... 2nd electrode 6C 3rd electrode 6D Electrode cover 6E Electrode cover holding member 6F Electrode cover holding plate 6G Electrode cover support bar 6H Electrode cover Fastener 6I ……… Hook support 6J ……… Hook 7 ……… Scale collection container 8 ……… Drain pump 9 ……… Drain hose 10 ……… Cooling tower 11 ……… Intake pipe 12 ……… Drain Tube 20 ......... Power cord 30 ......... Control units 36A, 36B ......... First and second high-frequency switches 40 ......... High-frequency switching command circuit 42 ......... High-frequency oscillators 43A, 43B ......... Grounding transistors 44A 44B ……… Diode 45 ……… Variable resistor 46 ……… Low frequency signal generator 49A, 49B ……… Low frequency switch 50 ……… Low frequency switching command circuit 52A, 52B ……… Resistance 60 ……… Polarity Switch circuit 100 ......... treated water 101, 102 ......... polarity switch

Claims (8)

A scale recovery device for recovering inorganic substances in treated water,
An apparatus main body for passing the water to be treated;
A water intake hose connected to the water intake side of the apparatus body,
A drainage hose connected to the discharge side of the apparatus body,
A control unit connected to the apparatus main body, for controlling the electrode unit, the water intake pump and the drainage pump;
A support plate vertically attached to the inner wall of the apparatus main body,
A water intake pump that is detachably attached to the support plate, and draws water to be treated into the apparatus main body through the water intake hose;
A drainage pump that is detachably attached to the support plate, and that discharges water to be treated from the apparatus main body through the discharge hose;
An electrode part detachably attached to the support plate;
A scale collection container attached via a hook provided on an electrode cover holding plate of an electrode cover holding member for holding the electrode part;
A scale collecting apparatus, wherein the scale attached to the electrode cover of the electrode part is peeled and removed by reversing the polarity of the electrode part. The control unit includes a manual electrode polarity changeover switch and / or timing means for measuring the energization time to the electrode unit, a control circuit for controlling the electrode unit, the water intake pump and the drainage pump, and the polarity of the electrode unit The scale recovery device according to claim 1, further comprising a polarity switching circuit that switches between the two. The polarity switching circuit reverses the polarity of the electrode part when the energization time to the electrode part measured by the time measuring means has reached a predetermined time set in advance, and similarly the energization time to the electrode part The scale recovery apparatus according to claim 2, wherein when the predetermined time set in advance is not reached, the polarity of the electrode portion is not reversed. The electrode part includes two or more electrodes made of any one or two or more of zinc, magnesium alloy, copper, iron, stainless steel, titanium alloy, aluminum alloy, and platinum, and an electrode cover that covers the electrode. The scale collection device according to any one of claims 1 to 3, wherein the scale collection device is characterized. The electrode cover holding member is fixed to the electrode cover holding plate, a hook support provided on the electrode cover holding plate, a hook attached to the hook support, and the electrode cover holding plate. The scale collection device according to claim 1, further comprising: an electrode cover support bar that holds the electrode cover; and an electrode cover fastener that fixes the electrode cover and the electrode cover support bar. The scale collection device according to claim 1, wherein the scale collection container is detachably supported on the electrode cover holding plate via the hook. The scale recovery apparatus according to claim 1 or 6, wherein the scale recovery container is a bottomed container having a top opening and a side surface having a mesh. The scale recovery device according to any one of claims 1 to 6, wherein the scale recovery container has a net mesh size of 1 to 25 mesh.

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