JP4518826B2 - Electrolytic wastewater treatment system, electrolysis control device, electrolytic wastewater treatment method, program, and storage medium - Google Patents

Description

  The present invention relates to an electrolytic wastewater treatment system, an electrolytic control device, an electrolytic wastewater treatment method, a program, and a storage medium.

  At power plants, large amounts of water are drained during various processes of power generation. For example, blow effluent from boiler / turbine system, regeneration effluent for feed water treatment and condensate demineralization, blow effluent from flue gas desulfurization equipment, warm effluent from cooling equipment, etc. It must be drained at the site, and all wastewater must be discharged below public standards based on the Water Pollution Control Law before being discharged into public water areas such as the sea and rivers.

One such wastewater treatment method is electrolysis, and in particular, an electrolyzer using a ferrite electrode has been used to reduce the COD of wastewater (see, for example, Patent Document 1).
JP 2003-126860 A

  When operating drainage facilities and equipment necessary for wastewater treatment, in places where drainage occurs in many places, such as power plants, installing drainage equipment and equipment in all locations is a cost and energy issue. From the aspect, it is very inefficient. Even where a wastewater treatment function is provided, when a large amount of wastewater is generated, additional man-hours are required for the treatment.

  Therefore, in such a case, a mobile drainage facility or apparatus is preferable. However, when a mobile system is operated, it is not efficient if each processing is performed manually.

  The present invention has been made in view of the circumstances as described above, a movable electrolytic wastewater treatment system for performing automated wastewater treatment, an electrolytic control device for controlling automated wastewater treatment, and for performing automated wastewater treatment. It is an object of the present invention to provide an electrolytic wastewater treatment method, a program for causing an electrolytic control apparatus to perform automated wastewater treatment, and a storage medium storing the program in a readable manner.

In order to solve the above problems, an electrolytic wastewater treatment system according to the present invention includes a wastewater storage tank for storing wastewater, a seawater storage tank for storing seawater, and sodium chloride for storing a sodium chloride aqueous solution having a predetermined concentration. residual for measuring and the aqueous solution tank, an electrolytic bath comprising an electrolysis device for electrolyzing the waste water discharged from the drainage savings tank, a residual chlorine concentration of the electrolytic solution of the electrolytic cell, during electrolysis A chlorine measuring device, an electrolytic cell water level measuring device for measuring the level of the electrolytic solution in the electrolytic cell, and a first pipe group extending from the waste water storage tank to the electrolytic cell, and draining the waste water storage tank A wastewater treatment pump that pumps up the piping of the first piping group and a second piping group that extends from the seawater storage tank to the electrolysis tank, and pumps up the seawater of the seawater storage tank into the piping of the second piping group. And a sodium chloride aqueous solution injection pumping up the sodium chloride aqueous solution from the sodium chloride aqueous solution tank to the piping of the third piping group. By operating a pump, an electrolytic solution treatment pump and an electrolytic cell drain valve for discharging an electrolytic solution from the electrolytic cell, and a seawater injection pump provided in the middle of the fourth piping group from the electrolytic cell, Controlling the discharge of the seawater from the seawater storage tank, controlling the discharge of the sodium chloride aqueous solution from the sodium chloride aqueous solution tank by operating the sodium chloride aqueous solution injection pump, and operating the drainage treatment pump By controlling the discharge of the waste water from the waste water storage tank and operating the electrolyzer, Controlling the electrolytic treatment in the tank, controlling the measurement process of the residual chlorine concentration by the residual chlorine measuring device (0031), and controlling the measurement process of the water level of the electrolytic solution by the electrolytic bath water level measuring device (0031) , and an electrolysis control device for controlling the discharge of the electrolytic solution from the electrolytic cell by controlling the electrolytic solution processing pump and the electrolytic cell drain valve, the electrolysis control device, the aqueous solution of sodium chloride overall The drainage, the sodium chloride aqueous solution, and the seawater are discharged to the electrolytic cell so as to occupy a predetermined ratio in the amount of solution .

The electrolytic control apparatus according to the present invention includes a drainage storage tank for storing wastewater, a seawater storage tank for storing seawater, a sodium chloride aqueous solution tank for storing a sodium chloride aqueous solution having a predetermined concentration, and the drainage storage tank. An electrolyzer equipped with an electrolyzer for electrolyzing the wastewater discharged from the electrolyzer, a residual chlorine measuring device for measuring the residual chlorine concentration of the electrolytic solution in the electrolyzer during electrolysis, and the electrolyzer An electrolyzer water level measuring device for measuring the water level of the electrolyte solution and a first pipe group extending from the drainage storage tank to the electrolysis tank, and draining the drainage storage tank to the pipe of the first pipe group A wastewater treatment pump that pumps up, a seawater injection pump that is provided in the middle of the second piping group from the seawater storage tank to the electrolysis tank, and pumps the seawater of the seawater storage tank into the piping of the second piping group; A sodium chloride aqueous solution injection pump provided in the middle of the third piping group extending from the sodium hydride aqueous solution tank to the electrolytic cell, and pumping the sodium chloride aqueous solution of the sodium chloride aqueous solution tank into the piping of the third piping group; An electrolytic control device used in an electrolytic wastewater treatment system including an electrolytic solution treatment pump and an electrolytic bath drain valve for discharging an electrolytic solution from the electrolytic bath, provided in the middle of the fourth piping group, By controlling the discharge of the seawater from the seawater storage tank by operating the seawater injection pump, and controlling the discharge of the sodium chloride aqueous solution from the sodium chloride aqueous solution tank by operating the sodium chloride aqueous solution injection pump, By controlling the discharge of the waste water from the waste water storage tank by operating the waste water treatment pump, The electrolysis apparatus is operated to control the electrolysis process in the electrolytic cell, the residual chlorine concentration measurement process by the residual chlorine measuring apparatus is controlled, and the water level of the electrolytic solution is measured by the electrolytic tank water level measuring apparatus Controlling the treatment, controlling the electrolytic solution treatment pump and the electrolytic cell drain valve to control the discharge of the electrolytic solution from the electrolytic cell, and the sodium chloride aqueous solution occupies a predetermined percentage of the total solution amount Thus, the said waste_water | drain, the said sodium chloride aqueous solution, and the said seawater are discharged | emitted to the said electrolytic vessel.

Further, the electrolytic wastewater treatment method according to the present invention includes a wastewater storage tank for storing wastewater, a seawater storage tank for storing seawater, a sodium chloride aqueous solution tank for storing a sodium chloride aqueous solution having a predetermined concentration, An electrolyzer equipped with an electrolyzer for electrolyzing the wastewater discharged from a wastewater storage tank, a residual chlorine measuring device for measuring the residual chlorine concentration of the electrolytic solution in the electrolyzer during electrolysis, and An electrolyzer water level measuring device for measuring the water level of the electrolytic solution in the electrolyzer, and provided in the middle of the first piping group from the drainage storage tank to the electrolysis tank, and draining the drainage storage tank to the drainage of the first piping group A wastewater treatment pump that pumps up the piping, and a seawater injection pump that is provided in the middle of the second piping group from the seawater storage tank to the electrolytic tank, and pumps the seawater of the seawater storage tank into the piping of the second piping group A sodium chloride aqueous solution injection pump provided in the middle of the third piping group from the sodium chloride aqueous solution tank to the electrolytic cell, and pumping the sodium chloride aqueous solution from the sodium chloride aqueous solution tank to the piping of the third piping group; A wastewater treatment method in an electrolytic wastewater treatment system provided in the middle of the fourth piping group from the tank, and including an electrolytic solution treatment pump and an electrolytic tank drainage valve for discharging the electrolytic solution from the electrolytic tank, By operating the seawater injection pump, the sodium chloride aqueous solution injection pump, and the wastewater treatment pump, the drainage, the sodium chloride aqueous solution, and the seawater are arranged so that the sodium chloride aqueous solution occupies a predetermined ratio in the total solution amount. Is discharged into the electrolytic cell, and the electrolyzer is operated, A step of electrolyzing a mixed solution of the waste water, the aqueous sodium chloride solution and the seawater in a tank, a step of measuring the residual chlorine concentration by the residual chlorine measuring device, and a water level measurement of the electrolytic cell A step of measuring the level of the electrolytic solution by an apparatus, and a step of discharging the electrolytic solution from the electrolytic cell by operating the electrolytic solution treatment pump and the electrolytic cell drain valve. .

A program according to the present invention is discharged from a drainage storage tank for storing wastewater, a seawater storage tank for storing seawater, a sodium chloride aqueous solution tank for storing a sodium chloride aqueous solution of a predetermined concentration, and the drainage storage tank. An electrolytic cell equipped with an electrolytic device for electrolyzing the waste water, a residual chlorine measuring device for measuring the residual chlorine concentration of the electrolytic solution in the electrolytic cell during electrolysis, and an electrolytic solution of the electrolytic cell An electrolyzer water level measuring device for measuring the level of water and a drainage treatment provided in the middle of the first piping group from the drainage storage tank to the electrolysis tank, and pumping the drainage of the drainage storage tank to the piping of the first piping group A pump, a seawater injection pump provided in the middle of the second piping group extending from the seawater storage tank to the electrolysis tank, and pumping the seawater of the seawater storage tank into the piping of the second piping group; and the sodium chloride A sodium chloride aqueous solution injection pump that is provided in the middle of the third piping group from the aqueous solution tank to the electrolytic cell and pumps up the sodium chloride aqueous solution from the sodium chloride aqueous solution tank to the piping of the third piping group; A program installed in the middle of the fourth piping group for operating an electrolytic control device used in an electrolytic wastewater treatment system including an electrolytic solution treatment pump and an electrolytic bath drainage valve for discharging an electrolytic solution from the electrolytic bath. In order to discharge the waste water, the sodium chloride aqueous solution, and the seawater to the electrolytic cell so that the sodium chloride aqueous solution occupies a predetermined ratio in the total solution amount, the seawater infusion pump, the sodium chloride Operating the aqueous solution injection pump, the wastewater treatment pump, and in the electrolytic cell, Operating the electrolyzer to electrolyze a mixed solution of water, the aqueous sodium chloride solution, and the seawater; and operating the residual chlorine measuring device to measure the residual chlorine concentration. Operating the electrolytic cell water level measuring device to measure the water level of the electrolytic solution, and operating the electrolytic solution treatment pump and the electrolytic cell drain valve to discharge the electrolytic solution from the electrolytic cell. And causing the electrolysis control device to execute.

  The storage medium according to the present invention stores the program so as to be readable by the electrolysis control device.

  According to the present invention, a movable electrolytic wastewater treatment system for performing automated wastewater treatment, an electrolytic control device for controlling automated wastewater treatment, an electrolytic wastewater treatment method for performing automated wastewater treatment, and an automated wastewater treatment for an electrolytic control device. It has become possible to provide a program to be executed and a storage medium storing the program in a readable manner.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The objects, features, advantages, and ideas of the present invention will be apparent to those skilled in the art from the description of the present specification, and those skilled in the art can easily reproduce the present invention from the description of the present specification. it can. The embodiments and specific examples of the invention described below show preferred embodiments of the present invention, and are shown for illustration or explanation. It is not limited. It will be apparent to those skilled in the art that various modifications and variations can be made based on the description of the present specification within the spirit and scope of the present invention disclosed herein.

=== Configuration diagram of electrolytic wastewater treatment system ===
FIG. 1 shows a configuration diagram of an electrolytic wastewater treatment system 1000 described as an embodiment of the present invention.

  As shown in FIG. 1, an electrolytic wastewater treatment system 1000 according to the present invention includes a seawater storage tank 200 that is a chloride ion tank that stores a solution containing chloride ions, a 20% sodium chloride aqueous solution tank 300, and a wastewater that stores wastewater. The tank 400, the seawater injection pump 210, the sodium chloride aqueous solution injection pump 310, the wastewater treatment pump 410, which are the pumps for pumping up the solution or waste water in each storage tank and tank, and the solution or waste water discharged from each storage tank and tank are filtered. Electrolyzer 500 for electrolyzing the solution discharged from filter 800, seawater storage tank 200, 20% sodium chloride aqueous solution tank 300, and drainage storage tank 400, and for returning the electrolytic solution discharged from electrolytic tank 500 back to the electrolytic tank Electrolytic solution treatment pump 510 as an electrolytic solution circulation device, supplying gas containing oxygen From the bubbling compressor 520 as an element supply device, the electrolytic cell water level measuring device 530 that measures the water level of the electrolytic solution in the electrolytic cell, the residual chlorine measuring device 600 that measures the residual chlorine concentration of the electrolytic solution in the electrolytic cell 500, and the electrolytic cell 500 A residual chlorine treatment device 700 that removes residual chlorine from the discharged electrolytic solution, an electrolysis control device 100 that controls the electrolytic wastewater treatment system 1000, and the like are provided.

  The electrolysis control apparatus 100 is connected to a seawater injection pump 210, a sodium chloride aqueous solution injection pump 310, and a wastewater treatment pump 410 via electric wires 1, 2, and 3, respectively. The valve 710, the residual chlorine measuring device 600, and the electrolytic cell water level measuring device 530 are connected. The electric wires 7 and 8 are connected to the electrolytic solution processing pump 510 and the bubbling compressor 520, respectively. The electric wire 9 is connected to the electrolytic cell 500. Connected to.

  The seawater injection pump 210 is connected to the seawater storage tank 200 by a pipe 20, and the pipe 20 is provided with a valve 220, and the seawater in the seawater storage tank 200 can be pumped into the pipe 21. The sodium chloride aqueous solution injection pump 310 is connected to a 20% sodium chloride aqueous solution tank 300 by a pipe 30, and the pipe 30 is provided with a valve 320, and a solution containing chloride ions in the 20% sodium chloride aqueous solution tank 300 is piped. Can be pumped to 31. The drainage treatment pump 410 is connected to the drainage storage tank 400 by a pipe 40, and a valve 420 is provided in the pipe 40, and the drainage of the drainage storage tank 400 can be pumped into the pipe 41. The pipes 21, 31 and 41 are coupled to the pipe 10. The pipe 10 is connected to the filter 800 via the pipe 11. That is, seawater, a solution containing chloride ions, and drainage flow into the filter 800 through the pipes 10 and 11.

  The electrolytic cell 500 includes a bubbling compressor 520 as an oxygen supply device that supplies a gas containing oxygen, an electrolytic cell water level measuring device 530 that measures the water level of the electrolytic solution in the electrolytic cell, and the waste water discharged from the electrolytic cell 500. And a circulation line pipe 13 that can be returned to the electrolytic cell 500 by using an electrolytic solution treatment pump 510. This pipe 13 is connected to the pipe 12 for taking in the waste water from the filter 800 and the pipe 14 for discharging the waste water from the electrolytic cell 500 to the residual chlorinator 700, and an electrolytic solution treatment pump 510 is installed. The residual chlorine concentration measuring device 600 is connected to the tube 60 through the tube 60. The electrolytic cell drain valve 710 is installed in the pipe 14 and controls discharge of the electrolytic solution from the electrolytic cell 500 to the residual chlorine processor 700. The residual chlorine treatment device 700 removes residual chlorine from the electrolytic solution from the electrolytic cell 500 and discharges it as treated waste water.

=== Electrolytic control device operation panel ===
FIG. 2 shows an operation panel of the electrolysis control apparatus 100 described as an embodiment of the present invention.

  As shown in FIG. 2, the operation panel of the electrolysis control apparatus 100 includes a display unit (upper part of the operation panel) indicating the operation status of each apparatus and a screen display display (lower part of the operation panel) that displays the current state of the electrolytic wastewater treatment apparatus 1000. ).

  The rectangle at the top of the operation panel is a display or the like indicating the operating status of each apparatus controlled by the electrolysis control apparatus 100. For example, when the electrolytic treatment pump 510 is operating, the electrolytic treatment pump indicator is turned on. It can also be a button type (ON / OFF is controlled by pressing a button) so that the display can manually control the electrolytic treatment pump 510.

  Further, the current status of the monitored electrolytic wastewater treatment apparatus 1000 is displayed on the left side of the screen display display at the bottom of the operation panel. For example, the current supply status such as 1A and 1V is displayed in the current and voltage columns, respectively.

  On the right side of the screen display at the bottom of the operation panel, when the electrolysis control apparatus 100 sets the discharge amount program, the end processing program, and the condition setting program, the setting contents of each program are displayed. The program once set can be stored by the program number and can be called again by the number.

=== Various condition settings ===
The discharge amounts from the drainage storage tank 400, the 20% sodium chloride aqueous solution tank 300, and the seawater storage tank 200 are determined so that the chloride concentration of the drainage discharged to the electrolytic tank 500 is 3% or more. Usually, the waste water in the waste water storage tank 400 and the solution in the 20% sodium chloride aqueous solution tank 300 may be mixed so that the chloride concentration becomes 3% or more. Since the chloride concentration in the waste water is generally unknown, it is preferable to add a 20% sodium chloride aqueous solution to 15% of the total solution amount.

Program the number of times to repeat electrolytic wastewater treatment. The number of treatments may be any number, but by setting this setting to be blank, setting is made until the drainage of the drainage storage tank 400 is exhausted. From the viewpoint of automation of the electrolytic treatment, it is preferable to leave it blank.

Conditions of the electrolysis is not particularly limited, a constant current is preferably a current density 10~1000A / dm ^2, from the economic point of view, further preferably 20~300A / dm ^2. At that time, it is preferable to control the voltage to be 1 V or more.

=== Procedure of electrolytic wastewater treatment system ===
The procedure of the electrolytic wastewater treatment system 1000 described as an embodiment of the present invention will be described in detail with reference to the flowchart of FIG.

  First, the electrolysis control apparatus 100 of the electrolytic wastewater treatment system 1000 is turned on.

  Seawater seawater injection pump 210, sodium chloride aqueous solution injection pump 310, and wastewater treatment pump 410 pump seawater, 20% aqueous sodium chloride solution, and wastewater by a preset amount, and filter 800 through pipes 10 and 11. Inject. Since these solutions may contain solids (for example, marine debris such as wood chips), the solids are removed by the filter 800 and then injected into the electrolytic cell 500 through the pipes 12 and 13. (S101).

  Next, the electrolysis control apparatus 100 controls the electrolysis process by the electrolysis apparatus (for example, electrode) 540. Specifically, the electrolysis control apparatus 100 supplies electricity to the electrolysis apparatus 540 provided in the electrolysis tank 500 using the electric wire 9 according to the current and voltage set for electrolysis, and starts electrolysis. (S102). Further, by operating the electrolytic solution treatment pump 510, the electrolytic solution discharged from the electrolytic cell 500 is circulated using the pipe 13 (S102). In addition, the bubbling compressor 520 is also operated to supply oxygen-containing gas to the electrolytic solution in order to increase the oxygen concentration in the electrolytic cell 500 and promote electrolysis. The residual chlorine concentration of the electrolytic solution in the electrolytic bath 500 circulating in the pipe 13 is measured using the residual chlorine measuring device 600 by the electrolytic solution treatment pump 510 (S103). By measuring the residual chlorine concentration and determining whether the measured concentration is equal to or higher than a predetermined value (S104), the end point of the electrolysis can be determined as described in Examples 1 to 4. That is, the electrolysis control apparatus 100 measures the chlorine concentration again when it is less than the predetermined value, and stops the electrolysis and the electrolytic solution treatment pump 510 when it is greater than the predetermined value (S105). Then, when the electrolytic drain valve 710 is opened to discharge the electrolyzed electrolytic cell 500 solution to the residual chlorinator 700 (S106), the electrolytic solution circulating in the pipe 13 passes through the pipe 14. It is discharged to the residual chlorine processor 700. The electrolysis control device 100 confirms whether or not the water level of the electrolyzer 500 detected by the electrolyzer water level measuring device 530 has reached a predetermined water level (for example, 0 indicating that the electrolyzer is empty) (S107), When the electrolytic cell water level measuring device 530 confirms that all the solution in the electrolytic cell 500 has been discharged, the electrolytic drain valve 710 is closed (S108), and the discharge of the electrolytic solution to the residual chlorinator 700 is stopped.

  In the residual chlorine treatment device 700, residual chlorine in the discharged electrolyte solution is removed using, for example, carbon fiber, zeolite, activated carbon or the like. As a result, residual chlorine in an oxidative form that causes corrosion of metals used in pipes, etc., such as free residual chlorine (hypochlorous acid and hypochlorite ions), combined residual chlorine (ammonia) And chlorine combined with organic nitrogen compounds, etc., and wastewater that is more favorable to the environment can be discharged.

  When the electrolytic drainage process is completed, the electrolysis control apparatus 100 determines whether the end process is a program set by the number of processes (S109). If it is a program for judging by the number of processing times, it is judged whether or not the current number of processing times has reached the set number of times (S110). If the set number of times has not been reached, the number of times is increased by one, and again. In order to repeat the electrolytic waste water treatment, it is determined whether there is waste water in the waste water storage tank 400 (S111). This is to prevent the electrolytic waste water treatment from being carried out even though there is no waste water. When it has reached, the power of the electrolysis control device 100 is turned off, and the electrolytic drainage treatment is finished. On the other hand, in the case of a program that does not judge based on the number of treatments, since the electrolytic drainage treatment is performed until the drainage of the drainage storage tank 400 is exhausted, it is confirmed whether there is any drainage in the drainage storage tank 400 (S111). If there is drainage, the process returns to S101 to repeat the electrolytic drainage process again. If there is no drainage, the electrolytic drainage process is terminated and the electrolysis control apparatus 100 is turned off.

=== Moving means of electrolytic wastewater treatment system ===
As a means for making the electrolytic wastewater treatment system movable, an electrolytic wastewater treatment system can be mounted, and any vehicle or vehicle that can move to any destination using power such as a prime mover Anything Examples thereof include, but are not limited to, a car for carrying cargo, an airplane, a ship, and the like.

Water quality measurement and COD for each electrolysis time were performed over 4 liters of water (including jellyfish dissolved in a solution containing 304 mg / L of COD) and 48 A of current with a Cannon electrode (Φ32 × 600 L) test machine. Was measured. The results are shown in Table 1 and FIG.

  As shown in Table 1 and FIG. 4, it can be confirmed that when the residual chlorine is 1,000 (mg / L) or more, the target treatment COD 50 (mg / L) or less. That is, it can be controlled to stop the electrolysis when the residual chlorine becomes 1,000 (mg / L) or more.

Drainage (containing 0.6 liters of NaCl 20% in 3.4 liters of flue flush water) 4 liters (NaCl concentration 3%) was passed through a 48 A current with a Cannon electrode (Φ32 x 600 L) tester over time. Ammonia was measured for each water quality measurement and electrolysis time. The results are shown in Table 2 and FIG.

  As shown in Table 2 and FIG. 5, when the residual chlorine is 100 (mg / L) or more, it can be confirmed that the target treated ammonia is 50 (mg / L) or less. That is, it can be controlled to stop electrolysis when the residual chlorine reaches 100 (mg / L).

Drainage (containing 0.1% NaCl 20% in 3.7 liters of flue flush water) 4 liters (NaCl concentration 1.5%) was energized with a Cannon electrode (Φ32 × 600L) tester at 48A. In particular, water quality was measured and ammonia was measured at every electrolysis time. The results are shown in Table 3 and FIG.

  As shown in Table 3 and FIG. 6, when the NaCl concentration is 1.5%, it takes more time than 3%, and it can be confirmed that the ammonia treatment cannot be performed efficiently.

Drainage (containing 1.7 liters of flue flush water, 1.7 liters of water and 0.6 liters of NaCl 20%) 4 liters (double diluted effluent adjusted to 3% NaCl concentration), Cannon electrode (Φ32 × 600L) A current of 48 A was applied with a test machine, and water quality was measured over time and ammonia was measured at every electrolysis time. The results are shown in Table 4 and FIG.

  As shown in Table 4 and FIG. 7, when the electrolysis is controlled so that the residual chlorine is 100 (mg / L) when diluted twice and the NaCl concentration is 3%, more efficient ammonia treatment can be achieved than without dilution. I can confirm that I do it.

  According to the above Examples 1 to 4, the solution injected into the electrolytic cell 500 desirably has a chloride concentration of 3% or more, and the residual chlorine concentration is 1000 (mg / L) for the purpose of COD treatment. Is a predetermined concentration, and 100 (mg / L) is preferably a predetermined concentration when ammonia treatment is intended. If both COD treatment and ammonia treatment are intended, 1000 (mg / L) is preferably set to a predetermined concentration.

It is a figure which shows the structure of the electrolytic waste water treatment system 1000 demonstrated as one Example of this invention. It is a figure which shows the operation panel of the electrolysis control apparatus 100 demonstrated as one Example of this invention. It is a flowchart which shows the process sequence of the electrolytic waste water treatment system 1000 demonstrated as one Example of this invention. It is a figure which shows the measurement result of the residual chlorine with respect to the electrolysis time of Example 1, and COD. It is a figure which shows the measurement result of the residual chlorine with respect to the electrolysis time of Example 2, and COD. It is a figure which shows the measurement result of the residual chlorine with respect to electrolysis time of Example 3, and COD. It is a figure which shows the measurement result of the residual chlorine and COD with respect to the electrolysis time of Example 4.

Explanation of symbols

1-9 Electric wire 10-14 Piping 20-21 Piping 30-31 Piping 40-41 Piping 60 Tube 100 Electrolytic control device 200 Seawater storage tank 210 Seawater infusion pump 220 Valve 300 20% sodium chloride aqueous solution tank 310 Sodium chloride aqueous solution infusion pump 320 Valve 400 Wastewater storage tank 410 Wastewater treatment pump 420 Valve 500 Electrolytic tank 510 Electrolytic solution treatment pump 520 Compressor for bubbling 530 Electrolyzer water level measuring device 540 Electrolytic device 600 Residual chlorine measuring device 700 Residual chlorine processor 710 Electrolytic drainage valve 1000 Electrolytic wastewater treatment system

Claims (12)

A waste water storage tank for storing waste water;
A seawater storage tank for storing seawater;
A sodium chloride aqueous solution tank for storing a sodium chloride aqueous solution of a predetermined concentration;
An electrolytic bath comprising an electrolysis device for electrolyzing the waste water discharged from the drainage savings tank,
A residual chlorine measuring device for measuring the residual chlorine concentration of the electrolytic solution in the electrolytic cell during electrolysis;
An electrolyzer water level measuring device for measuring the water level of the electrolytic solution in the electrolyzer;
A drainage treatment pump provided in the middle of the first piping group from the drainage storage tank to the electrolytic cell, and pumping the drainage of the drainage storage tank to the piping of the first piping group;
A seawater injection pump provided in the middle of the second piping group extending from the seawater storage tank to the electrolytic cell, and pumping the seawater of the seawater storage tank into the piping of the second piping group;
A sodium chloride aqueous solution injection pump provided in the middle of the third piping group from the sodium chloride aqueous solution tank to the electrolytic cell, and pumping up the sodium chloride aqueous solution of the sodium chloride aqueous solution tank to the piping of the third piping group;
Provided in the middle of the fourth piping group from the electrolytic cell, and an electrolytic solution treatment pump and an electrolytic cell drain valve for discharging the electrolytic solution from the electrolytic cell;
By controlling the discharge of the seawater from the seawater storage tank by operating the seawater injection pump, and controlling the discharge of the sodium chloride aqueous solution from the sodium chloride aqueous solution tank by operating the sodium chloride aqueous solution injection pump, The drainage treatment pump is operated to control the discharge of the wastewater from the wastewater storage tank, the electrolysis device is operated to control the electrolysis treatment in the electrolytic tank, and the residual chlorine measurement device uses the residual chlorine measurement device. Control the concentration measurement process, control the measurement process of the electrolytic solution water level by the electrolytic cell water level measuring device, and control the electrolytic solution treatment pump and the electrolytic cell drain valve to control the electrolytic solution from the electrolytic cell An electrolysis control device for controlling the discharge of
With
The electrolysis control device comprises:
The electrolytic wastewater treatment system , wherein the wastewater, the sodium chloride aqueous solution, and the seawater are discharged to the electrolytic cell so that the sodium chloride aqueous solution occupies a predetermined ratio in the total solution amount . The concentration of the sodium chloride aqueous solution is 20%,
The electrolysis control device comprises:
By discharging the waste water, the sodium chloride aqueous solution and the seawater to the electrolytic cell so that the sodium chloride aqueous solution accounts for 15% of the total solution amount, the chloride concentration of the electrolytic solution in the electrolytic cell The electrolytic waste water treatment system according to claim 1, wherein the content is 3% or more .   The electrolytic wastewater treatment system according to claim 1 or 2, wherein the residual chlorine measuring device determines an end point of the electrolysis by measuring a residual chlorine concentration of an electrolytic solution in the electrolytic cell. . A filter for filtering the solution discharged from each of the waste water storage tank, the sea water storage tank, and the sodium chloride aqueous solution tank is located downstream of the waste water treatment pump, the sea water injection pump, and the sodium chloride aqueous solution injection pump. electrolysis wastewater treatment system according to any one of claims 1 to 3, characterized in that it comprises upstream of the electrolytic cell Te. Electrolytic solution discharged from the electrolytic cell through the fourth pipe group, the residual chlorine was removed from the claim 1, characterized in that it comprises a residual chlorine processing apparatus for discharging a treated wastewater in any one of 4 The described electrolytic wastewater treatment system. An electrolytic solution circulation device for circulating the electrolytic solution that returns the electrolytic solution discharged from the electrolytic cell to the electrolytic cell again,
The residual chlorine measuring device measures the residual chlorine concentration of the electrolytic solution in the electrolytic cell during electrolysis by measuring the residual chlorine concentration of the electrolytic solution during circulation of the electrolytic solution. electrolysis wastewater treatment system according to claim 1, any one of 5 to. Electrolysis wastewater treatment system according to any one of claims 1 6, characterized in that it comprises an oxygen supply unit for supplying the electrolytic solution in said electrolytic bath a gas containing oxygen. Electrolysis wastewater treatment system according to any one of claims 1 to 7, characterized in that it comprises a moving means for moving the whole system. A waste water storage tank for storing waste water;
A seawater storage tank for storing seawater;
A sodium chloride aqueous solution tank for storing a sodium chloride aqueous solution of a predetermined concentration;
An electrolyzer comprising an electrolyzer for electrolyzing the wastewater discharged from the wastewater storage tank;
A residual chlorine measuring device for measuring the residual chlorine concentration of the electrolytic solution in the electrolytic cell during electrolysis;
An electrolyzer water level measuring device for measuring the water level of the electrolytic solution in the electrolyzer;
A drainage treatment pump provided in the middle of the first piping group from the drainage storage tank to the electrolytic cell, and pumping the drainage of the drainage storage tank to the piping of the first piping group;
A seawater injection pump provided in the middle of the second piping group extending from the seawater storage tank to the electrolytic cell, and pumping the seawater of the seawater storage tank into the piping of the second piping group;
A sodium chloride aqueous solution injection pump provided in the middle of the third piping group from the sodium chloride aqueous solution tank to the electrolytic cell, and pumping up the sodium chloride aqueous solution of the sodium chloride aqueous solution tank to the piping of the third piping group;
Provided in the middle of the fourth piping group from the electrolytic cell, and an electrolytic solution treatment pump and an electrolytic cell drain valve for discharging the electrolytic solution from the electrolytic cell;
An electrolytic control device used for an electrolytic wastewater treatment system including
By controlling the discharge of the seawater from the seawater storage tank by operating the seawater injection pump,
By controlling the discharge of the sodium chloride aqueous solution from the sodium chloride aqueous solution tank by operating the sodium chloride aqueous solution injection pump,
By controlling the discharge of the waste water from the waste water storage tank by operating the waste water treatment pump,
By controlling the electrolysis process in the electrolytic cell by operating the electrolyzer,
Controlling the measurement process of the residual chlorine concentration by the residual chlorine measuring device,
Control the measurement process of the water level of the electrolytic solution by the electrolytic cell water level measuring device,
Controlling the discharge of the electrolytic solution from the electrolytic cell by controlling the electrolytic solution treatment pump and the electrolytic cell drain valve; and
The electrolytic control apparatus for an electrolytic wastewater treatment system, wherein the wastewater, the sodium chloride aqueous solution, and the seawater are discharged to the electrolytic cell so that the sodium chloride aqueous solution occupies a predetermined ratio in the total solution amount. . A waste water storage tank for storing waste water;
A seawater storage tank for storing seawater;
A sodium chloride aqueous solution tank for storing a sodium chloride aqueous solution of a predetermined concentration;
An electrolyzer comprising an electrolyzer for electrolyzing the wastewater discharged from the wastewater storage tank;
A residual chlorine measuring device for measuring the residual chlorine concentration of the electrolytic solution in the electrolytic cell during electrolysis;
An electrolyzer water level measuring device for measuring the water level of the electrolytic solution in the electrolyzer;
A drainage treatment pump provided in the middle of the first piping group from the drainage storage tank to the electrolytic cell, and pumping the drainage of the drainage storage tank to the piping of the first piping group;
A seawater injection pump provided in the middle of the second piping group extending from the seawater storage tank to the electrolytic cell, and pumping the seawater of the seawater storage tank into the piping of the second piping group;
A sodium chloride aqueous solution injection pump provided in the middle of the third piping group from the sodium chloride aqueous solution tank to the electrolytic cell, and pumping up the sodium chloride aqueous solution of the sodium chloride aqueous solution tank to the piping of the third piping group;
Provided in the middle of the fourth piping group from the electrolytic cell, and an electrolytic solution treatment pump and an electrolytic cell drain valve for discharging the electrolytic solution from the electrolytic cell;
A wastewater treatment method in an electrolytic wastewater treatment system including
By operating the seawater injection pump, the sodium chloride aqueous solution injection pump, and the wastewater treatment pump, the drainage, the sodium chloride aqueous solution, and the seawater are arranged so that the sodium chloride aqueous solution occupies a predetermined ratio in the total solution amount. And discharging the electrolytic cell,
Electrolyzing a solution in which the waste water, the aqueous sodium chloride solution and the seawater are mixed in the electrolytic cell by operating the electrolysis device;
A step of measuring the residual chlorine concentration by the residual chlorine measuring device;
Measuring the water level of the electrolytic solution with the electrolytic cell water level measuring device;
A step of discharging the electrolytic solution from the electrolytic cell by operating the electrolytic solution treatment pump and the electrolytic cell drain valve;
A wastewater treatment method in an electrolytic wastewater treatment system, characterized in that: A waste water storage tank for storing waste water;
A seawater storage tank for storing seawater;
A sodium chloride aqueous solution tank for storing a sodium chloride aqueous solution of a predetermined concentration;
An electrolyzer comprising an electrolyzer for electrolyzing the wastewater discharged from the wastewater storage tank;
A residual chlorine measuring device for measuring the residual chlorine concentration of the electrolytic solution in the electrolytic cell during electrolysis;
An electrolyzer water level measuring device for measuring the water level of the electrolytic solution in the electrolyzer;
A drainage treatment pump provided in the middle of the first piping group from the drainage storage tank to the electrolytic cell, and pumping the drainage of the drainage storage tank to the piping of the first piping group;
A seawater injection pump provided in the middle of the second piping group extending from the seawater storage tank to the electrolytic cell, and pumping the seawater of the seawater storage tank into the piping of the second piping group;
A sodium chloride aqueous solution injection pump provided in the middle of the third piping group from the sodium chloride aqueous solution tank to the electrolytic cell, and pumping up the sodium chloride aqueous solution of the sodium chloride aqueous solution tank to the piping of the third piping group;
Provided in the middle of the fourth piping group from the electrolytic cell, and an electrolytic solution treatment pump and an electrolytic cell drain valve for discharging the electrolytic solution from the electrolytic cell;
A program for operating an electrolytic control device used in an electrolytic wastewater treatment system including
In order to discharge the waste water, the sodium chloride aqueous solution, and the seawater to the electrolytic cell so that the sodium chloride aqueous solution occupies a predetermined ratio in the total solution amount, the seawater injection pump, the sodium chloride aqueous solution injection pump Operating the wastewater treatment pump;
Operating the electrolyzer to electrolyze a solution in which the wastewater, the sodium chloride aqueous solution and the seawater are mixed in the electrolytic cell;
Operating the residual chlorine measuring device to measure the residual chlorine concentration;
Operating the electrolyzer water level measuring device to measure the water level of the electrolytic solution;
Operating the electrolytic solution treatment pump and the electrolytic cell drain valve to drain the electrolytic solution from the electrolytic cell;
A program to be executed by the electrolytic control apparatus. Storage medium a program description, stored in the readable state in the electrolysis control apparatus in claim 11.

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