JP7435360B2 - Fluid circulation devices and operation control systems used in fluid circulation devices - Google Patents

Description

The present invention relates to a fluid circulation device mainly used for electrolytic treatment and an operation control system used for the fluid circulation device.

In recent years, many production devices have been installed in various production factories from the viewpoint of improving production capacity and production efficiency. For example, in a copper smelting factory, equipment such as flash furnaces, converters, boilers attached to refining furnaces, various circulation pumps, and cooling towers are installed to maintain the productivity of the factory. .

In preparation for a power outage due to an earthquake or other disaster, such production factories usually have two power systems used for normal operations (normal power system) and an emergency power system that is activated in the event of a power outage in the normal power system. A system is established. When a power outage is detected, the system switches to an emergency power system and automatically starts an emergency power source such as a diesel generator. When the voltage of the emergency power source is established, power is transmitted to a plurality of predetermined equipment (load equipment) to start up the load equipment.

For example, from the perspective of emergency response, Patent Document 1 describes an operation control system that automatically starts load devices in a predetermined order of startup in order to prevent capacity strain on the emergency power source due to duplication of starting loads. is disclosed.

According to Patent Document 1, it is possible to prevent duplication of starting loads due to the emergency power system, and equipment to be started can be started efficiently without delay.

Japanese Patent Application Publication No. 2018-180858

Now, as such load equipment, for example, there is a device used for electrolytic treatment. Such a device is equipped with an electrolytic cell that performs electrolytic treatment, and further equipped with a circulation pump that sends and circulates fluid.

However, in such a fluid circulation device, if the power system of the fluid circulation device experiences a power outage while the fluid is being circulated and a predetermined process is being performed, it may be difficult to restart the fluid circulation device using the emergency power system. Ta. For example, if a power outage occurs in the power system of a fluid circulation device and the circulation pump that sends fluid to a high position in the device stops, the fluid present in the high position may flow back to the circulation pump. . If the circulation pump is started with reverse flow, there is a risk that an excessive load will be placed on the circulation pump, causing it to trip. Therefore, it can be said that it is difficult to restart the circulation pump in a state where fluid is flowing backwards.

The present invention was proposed in view of the above-mentioned circumstances, and is a fluid circulation device equipped with a circulation pump that sends and circulates fluid. An object of the present invention is to provide a technique that enables a device to be restarted without causing problems such as tripping.

As a result of intensive studies to achieve the above-mentioned problems, the inventor of the present invention installed an automatic on-off valve in the flow path of the fluid sent from the circulation pump, and when the power system of the device loses power, a predetermined detection signal is activated. The inventors have discovered that the above-mentioned problems can be solved by controlling automatic on-off valves based on the above, and have completed the present invention.

(1) The first aspect of the present invention is a fluid circulation device equipped with a circulation pump that sends and circulates a fluid, and an automatic opening/closing valve is provided in a passage for the fluid sent from the circulation pump. , the automatic opening/closing valve is controlled by a detection signal of a power outage in the power system and a detection signal of activation of an emergency power source activated by the detection of the power outage when the power system of the fluid circulation device has a power outage. , a fluid circulation device.

(2) A second aspect of the present invention is the fluid circulation device according to the first aspect, wherein the circulation pump is for sending and circulating the fluid to a high position in the height direction of the equipment. .

(3) The third aspect of the present invention is that in the first or second aspect, the fluid circulation device includes a power outage detection section that detects a power outage in the power system, and an emergency function that is activated by a power outage detection signal from the power outage detection section. The fluid circulation device includes an operation control unit including an operation detection unit that detects operation of a power source, and a control unit that controls opening and closing of the automatic on-off valve.

(4) In a fourth aspect of the present invention, in the third aspect, in the operation control section, the control section closes the automatic on-off valve based on reception of an operation detection signal by the operation detection section. This is a fluid circulation device that controls the

(5) A fifth aspect of the present invention is the fluid circulation device according to the fourth aspect, wherein the operation control unit controls the automatic on-off valve to open when the circulation pump is started. It is.

(6) According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, the fluid circulation device includes an electrolytic cell that performs electrolytic treatment and a temperature of the fluid sent from the circulation pump. The fluid circulation device further includes a heat exchanger for adjustment, and is used for electrolytic treatment.

(7) The seventh aspect of the present invention is a circulation pump that sends and circulates fluid to a high position in the height direction of equipment, and an automatic on-off valve provided in a passage for the fluid sent from the circulation pump. An operation control system for use in a fluid circulation device, comprising: a power outage detection unit that detects a power outage in the power system in the fluid circulation device; and activation of an emergency power source that is activated by a power outage detection signal from the power outage detection unit. an operation detection unit that detects the automatic opening/closing valve; and a control unit that controls opening/closing of the automatic opening/closing valve; This is an operation control system that controls the valve to close.

According to the present invention, in a fluid circulation device equipped with a circulation pump, when the device is restarted by an emergency power system, the device can be restarted without causing problems such as tripping.

FIG. 2 is a configuration diagram showing the configuration of a fluid circulation device. FIG. 1 is a block diagram showing the configuration of an operation control system. It is a flowchart which shows the flow until it controls an automatic opening-and-closing valve to a closed state by an operation control part. It is a flowchart which shows the flow of start-up control of each electric power load device by an operation control part.

Hereinafter, an embodiment of the present invention (hereinafter referred to as "this embodiment") will be described in detail. Note that the present invention is not limited to the following embodiments, and various changes can be made without departing from the gist of the present invention.

≪1. Fluid circulation device≫
<1-1. Configuration of fluid circulation device>
FIG. 1 shows the configuration of a fluid circulation device according to this embodiment. The fluid circulation device is a device used for electrolytic treatment, and includes an electrolytic cell as a processing tank and a circulation pump that circulates an electrolytic solution in the electrolytic cell. Specifically, the fluid circulation device 1 includes an electrolytic cell 11, a storage tank 12, a circulation pump 13, a heat exchanger 14, and a supply tank 15. Further, the fluid circulation device 1 includes an automatic on-off valve 16 in the flow path of the electrolytic solution sent from the circulation pump 13 (flow path on the downstream side of the circulation pump 13). Further, the fluid circulation device 1 includes an operation control section 2 that controls opening and closing of the automatic on-off valve 16.

Note that the configuration diagram of the fluid circulation device 1 shown in FIG. 1 is shown so that the top and bottom of the drawing paper correspond to the height direction of the device equipment. That is, as shown in FIG. 1, in the equipment of the fluid circulation device 1, the storage tank 12 is arranged below the electrolytic tank 11 in the height direction, and the storage tank 12 is arranged above the electrolytic tank 11 in the height direction. A supply tank 15 is arranged. As will be described in detail later, in the fluid circulation device 1, the electrolytic solution (processing solution) stored in the storage tank 12 is pumped up and circulated by the circulation pump 13 to the supply tank 15 located above in the height direction. It has become.

In the fluid circulation device 1, an electrolytic solution (hereinafter also referred to as a processing solution) is held in an electrolytic cell 11 which is a reaction processing tank, and an anode and a cathode are inserted therein to perform electrolytic processing. For example, the electrolytic treatment in the electrolytic cell 11 can include electrolytic smelting of copper. Note that there may be one anode and one cathode, or a plurality of anodes and cathodes may be inserted alternately.

The fluid circulation device 1 is configured to be able to discharge the processing liquid from the electrolytic cell 11 to the outside. The processing liquid discharged from the electrolytic cell 11 falls under its own weight and is sent to the storage tank 12, where it is stored. The storage tank 12 is connected to a heat exchanger 14 and a supply tank 15 located at a high position in the height direction via piping that serves as a flow path for the processing liquid, and the processing liquid is sent to the flow path piping. A circulation pump 13 is provided to circulate the water.

The processing liquid sent by the circulation pump 13 is adjusted to a desired temperature by passing through the heat exchanger 14, and is sent to the supply tank 15 for storage. The supply tank 15 stores an electrolytic solution, which is a processing solution circulated by the circulation pump 13, and then sends and supplies the electrolytic solution to the electrolytic tank 11 again. In this way, in the fluid circulation device 1, the electrolytic solution, which is a processing liquid, is circulated.

<1-2. About automatic opening/closing valve>
Here, as described above, the automatic on-off valve 16 is provided in the flow path piping on the downstream side of the circulation pump 13. The automatic opening/closing valve 16 operates to open and close a flow path for the processing liquid sent by the circulation pump 13 .

In the fluid circulation device 1, during normal operation, the automatic on-off valve 16 is in an open state, so that the processing liquid can be sent from the circulation pump 13 to the supply tank 15 provided at a high position in the height direction. It has become. Note that when the automatic on-off valve 16 is in the "open state", it means that the flow path formed by the piping is open, and the processing liquid can flow through the flow path piping in which the automatic on-off valve 16 is provided. It means that it is in a state.

On the other hand, the automatic opening/closing valve 16 is configured such that its opening/closing is controlled by the operation control unit 2, and when the power system of the fluid circulation device 1 experiences a power outage, the operation control unit 2 The automatic on-off valve 16 is controlled to be in a closed state based on the detection signal. Note that when the automatic on-off valve 16 is in a "closed state", it means that the flow path formed by the piping is closed, and the processing liquid cannot flow through the flow path piping in which the automatic on-off valve 16 is installed. It means that it is in a state.

More specifically, the automatic on-off valve 16 is electrically connected to the operation control section 2 that controls its opening and closing. The operation control unit 2 includes a power outage detection unit 21 that detects a power outage in the power system of the fluid circulation device 1, an operation detection unit 22 that detects the operation of an emergency power source activated by a power outage detection signal, and an automatic on-off valve 16. It has at least a control section 23 that controls opening and closing (described in more detail later with reference to FIG. 2). When the control unit 23 receives the power outage detection signal from the power outage detection unit 21 and the operation detection signal from the operation detection unit 22, it controls the automatic on-off valve 16 to be in the closed state. As a result, even if a power outage occurs in the power system of the fluid circulation device 1, the processing liquid that is being circulated to the supply tank 15, which is located at a high location in the height direction, will flow back to the circulation pump 13. As a result, it is possible to effectively prevent a trip from occurring and making restart difficult.

<1-3. Regarding the configuration of the operation control section>
FIG. 2 is a diagram showing the configuration of the operation control section 2 that constitutes the fluid circulation device 1. As shown in FIG. FIG. 2 also shows an emergency power source 3 connected to the fluid circulation device 1. The emergency power source 3 is a power source for an emergency power system provided in the fluid circulation device 1, and when the normal power system is completely out of power due to an earthquake or the like, it receives a power outage detection signal from a power outage detection unit 21, which will be described later. Upon reception, the emergency power system is activated to activate the load equipment group including the circulation pump 13. Note that the emergency power source 3 is not particularly limited, and for example, a diesel engine generator (DEG) can be used.

The operation control section 2 includes a power outage detection section 21 that detects a power outage in the power system in the fluid circulation device 1, an operation detection section 22 that detects operation of the emergency power source 3, and a control section 23.

The power outage detection unit 21 detects a power outage in the power system of the fluid circulation device 1. The power failure detection unit 21 is electrically connected to the emergency power supply 3 and the control unit 23, and when detecting a power failure in the power system of the fluid circulation device 1, transmits the power failure detection signal to the emergency power supply 3 and the control unit 23. output to section 23.

The operation detection unit 22 detects that the emergency power source 3 has been activated. The operation detection section 22 is electrically connected to the emergency power source 3 and the control section 23, and outputs an operation detection signal to the control section 23 when it detects that the emergency power source 3 is activated.

The control unit 23 controls the operation of the power load devices that constitute the fluid circulation device 1 . Particularly in the fluid circulation device 1, the control unit 23 is configured to control opening and closing of the automatic on-off valve 16 provided in the flow path downstream of the circulation pump 13. A detection signal (operation detection signal) of the operation of the emergency power source is received from the operation detection section 22 and the opening and closing of the automatic opening/closing valve 16 is controlled.

More specifically, when the control unit 23 receives an operation detection signal from the operation detection unit 22 due to a power outage in the power system of the fluid circulation device 1, the control unit 23 closes the automatic on-off valve 16. Control. In other words, the control unit 23 controls the automatic on-off valve 16 to be in a closed state, so that the processing liquid flows through the flow path piping between the circulation pump 13, the heat exchanger 14, and the supply tank 15. This prevents the processing liquid sent from the circulation pump 13 toward the supply tank 15 from flowing back into the circulation pump 13 at the time of a power outage in the power system.

Further, the control unit 23 controls activation of each power load device by the emergency power source 3 in the fluid circulation device 1. The flow of startup control for each power load device will be described in detail later, but the control unit 23 controls the operation of the circulation pump 13, which is one of the power load devices, in a predetermined flow to start startup, for example. , the automatic on-off valve 16 is controlled to be in the open state. That is, when the circulation pump 13, which is a power load device, is ready to start (start by the emergency power source), the control unit 23 receives the operation signal and opens the automatic on-off valve 16. This allows the processing liquid sent from the circulation pump 13 that starts to flow smoothly to the supply tank 15 via the flow path piping provided with the automatic opening/closing valve 16. .

<1-4. Control flow for closing the automatic on-off valve>
FIG. 3 is a flowchart showing the flow of controlling the automatic on-off valve 16 to be closed by the operation control unit 2 when the power system of the fluid circulation device 1 is completely out of power. In the operation control unit 2, the control unit 23 constantly monitors the presence or absence of power failure detection information (power failure detection signal) from the power failure detection unit 21, and enters a power outage sequence when a power failure is detected.

First, when entering the power outage sequence, the control section 23 executes confirmation of the presence or absence of a power outage detection signal from the power outage detection section 21 (ON confirmation) (step SP1). When the control unit 23 confirms reception of the power outage detection signal (YES), the process moves to step SP2. At this time, the power outage detection unit 21 also transmits a power outage detection signal to the emergency power source 3. The emergency power supply 3 that receives the power outage detection signal from the power outage detection unit 21 starts operating the emergency power system. On the other hand, the operation detection unit 22 that has detected the operation of the power system in the emergency power supply 3 transmits an emergency power supply activation signal to the control unit 23.

Next, in step SP2, the control unit 23 performs an output cutoff process to cut off the output of operation commands for equipment that does not need to be started, among the equipment forming the load equipment group, prior to power restoration. This can prevent the power capacity from becoming tight due to the activation of equipment that does not require activation.

Next, in step SP3, when the control section 23 confirms reception of the detection signal of the operation of the emergency power source from the operation detection section 22 (YES), the process moves to step SP4. On the other hand, if reception of the detection signal from the operation detection section 22 is not confirmed, the confirmation work is repeated.

Next, in step SP4, the control section 23 that has received the detection signal from the operation detection section 22 controls the automatic opening/closing valve 16 that constitutes the fluid circulation device to be in a closed state. This can prevent the processing liquid sent toward the supply tank 15 from flowing back into the circulation pump 13 at the time of a power outage in the power system.

<1-5. Flow of control to open the automatic on-off valve and start-up control of each power load device>
Next, the flow of control for opening the automatic opening/closing valve 16 after the automatic opening/closing valve 16 is in the closed state and startup control of each power load device including the circulation pump 13 will be described. FIG. 4 is a flowchart illustrating the flow of startup control for each power load device after the automatic on-off valve 16 is closed in step SP4 of FIG. That is, FIG. 4 is a flowchart from when the automatic on-off valve 16 is closed and the process moves from step SP4 to step SP5 until all of the equipment starts up. In this start-up control, the control unit 23 sequentially outputs start-up commands to the equipment to be automatically started, such as the circulation pump 13, to start them.

In step SP5, the control section 23 starts an automatic startup management timer by the startup time measuring section, and starts measuring time until the equipment starts up.

Next, in step SP6, the control section 23 causes the startup time measuring section to start counting up the automatic startup management timer.

Next, in step SP7, the control unit 23 checks whether the power transmission system up to the equipment to be activated is charged. It is checked whether the power transmission system up to the equipment is charged, and if it is not charged (NO), the process moves to step SP8. In step SP8, the automatic startup exclusion flag is turned on, the startup failure message is turned on, the automatic startup sequence of the equipment is interrupted, and the process moves to the automatic startup sequence of the next equipment in the startup order.

On the other hand, if it is confirmed that the power transmission system is being charged (YES in step SP7), then the process moves to step SP9. In step SP9, the control unit 23 checks whether the operating conditions for the load device to be activated are satisfied. For example, when the equipment is a circulation pump, the operating conditions include operating conditions such as the pressure for feeding the processing liquid (fluid).

If it is determined in step SP9 that the operating conditions for the equipment are not satisfied (NO), the process moves to step SP10. In step SP10, the control unit 23 turns on the automatic startup standby flag, starts a standby time management timer, and waits until the operating conditions for starting the equipment are satisfied. If the operating conditions for activation are not satisfied even after the arbitrarily set standby time has elapsed, the process proceeds to step SP12, where the automatic start standby flag is turned off and the standby time management timer is turned off. Stop and move to the automatic startup sequence of the equipment in the next startup order.

If it is determined in step SP9 that the operating conditions for the equipment are satisfied (YES), the process moves to step SP11. In step SP11, the control unit 23 checks the capacity of the emergency power source 3 that can supply power to the equipment, and determines whether or not the equipment can be started based on the load capacity. conduct.

If it is determined in step SP11 that the capacity of the emergency power source is not sufficient (NO), the process moves to step SP10. In step SP10, the control unit 23 turns on the automatic startup standby flag, starts a standby time management timer, and waits until the load injection capacity becomes satisfactory. If the capacity that can be loaded is not sufficient even after the arbitrarily set standby time has elapsed, the process moves to step SP12. In step SP12, the automatic startup standby flag is turned OFF, the standby time management timer is stopped, and the process moves to the automatic startup sequence of the equipment in the next startup order.

If it is determined in step SP11 that the capacity of the emergency power source 3 is sufficient (YES), the process moves to step SP13. In step SP13, when the equipment to be activated is the circulation pump 13, the control unit 23 controls the automatic on-off valve 16 to open. In this way, when the circulation pump 13 is started, the automatic opening/closing valve 16, which has been in the closed state, is opened, thereby allowing the processing liquid to flow through the flow path piping. Note that if the equipment to be activated is different from the circulation pump 13, step SP13 is skipped and the process moves to step SP14.

Next, in step SP14, the control unit 23 outputs an operation command to equipment including the circulation pump 13 for which the operating conditions have been satisfied (load operation signal ON).

Next, in step SP15, the control unit 23 confirms the load activation of the equipment that has output the operation command. If the load start-up is not confirmed even after an arbitrarily set time has elapsed (NO), the control unit 23 proceeds to step SP16, and if the load start-up is confirmed (YES), the control unit 23 proceeds to step SP17.

In step SP16, since load startup of the equipment is not confirmed even after an arbitrarily set time has elapsed, the automatic startup failure flag is set to ON state, the startup failure message is set to ON state, and the next startup order is set. Shifts to automatic startup sequence for equipment.

In step SP17, the automatic start success flag is turned on as load start of the equipment is confirmed.

Next, in step SP18, the control unit 23 checks whether all the equipment constituting the load equipment group has been started (confirmation of completion of full load start-up step). When the start-up of the equipment is completed, the automatic start-up sequence is sequentially started according to the predetermined start-up order, and the automatic start-up starts. That is, the flow of "NO" as a result of the confirmation in step SP18 becomes the flow of transition to the next boot order sequence. At this time, since the processing liquid is brought into a state where it can flow through the flow path piping in step SP13 described above, it becomes possible to send the processing liquid from the circulation pump 13 to the supply tank 15.

If it is determined in step SP18 that all the equipment constituting the load equipment group has been started (YES), the power outage sequence completion message is turned on and the automatic control sequence is stopped.

In this way, by starting up the equipment in the fluid circulation system in stages so that the starting loads do not overlap, it is possible to prevent the starting loads from duplicating and to achieve efficient operation without operator intervention. can be started automatically.

<1-6. Start-up order of equipment in fluid circulation equipment>
An example of the starting order of equipment in the fluid circulation system 1 of FIG. 1 having a plurality of equipment will be described. In the fluid circulation device 1 of FIG. 1, the circulation pump 13 and the heat exchanger 14 correspond to equipment operated by the electric power system. Since the electrolytic cell 11 requires a relatively large amount of electricity due to energization of the anode and cathode, etc., it is not operated by the emergency power system, but is operated by the normal power system after the regular power supply is restored. It is preferable to operate it.

First, when the control unit 23 confirms that the circulation pump 13 is charged by the power transmission system, that the capacity of the emergency power source 3 is sufficient, and that the circulation pump 13 is ready to start, Instructs to start the circulation pump 13. When the circulation pump 13 is started, the automatic on-off valve 16 is controlled to be in an open state.

Next, the power transmission system instructs the heat exchanger 14 that is confirmed to be charged to start up. Specifically, a heat source such as a boiler, a turbine, or the like provided in the heat exchanger 14 is activated by an emergency power system from an emergency power source, and the function as a heat exchanger is restored.

By going through the above startup order, the processing liquid sent from the circulation pump 13 that starts startup can be smoothly distributed to the supply tank 15 via the flow path piping provided with the automatic opening/closing valve 16. . In addition, since the circulation pump 13 is activated with priority over the heat exchanger 14, it is possible to pump up the electrolytic solution (processing liquid) stored in the storage tank 12 to the supply tank 15. It is possible to effectively prevent the electrolytic solution (processing solution) from running out and the electrolytic solution (processing solution) from overflowing in the storage tank 12. Further, the temperature of the processing liquid flowing through the heat exchanger 14 can be quickly adjusted to a desired temperature.

By going through the above startup order, circulation can be quickly restarted while the processing solution is retained in the electrolytic cell 11, and the processing solution can be quickly adjusted to the desired temperature. Energization to the anode and cathode in the tank 11 can be promptly restarted. In other words, it is possible to promptly restart the electrolytic treatment.

≪2. Operation control system≫
The operation control unit 2 in the fluid circulation device 1 described above can also be defined as an operation control system configured independently of the fluid circulation device 1. That is, for example, a fluid circulation device that includes a circulation pump that sends and circulates fluid to a high position in the height direction of the device equipment, and an automatic opening/closing valve provided in a passage for the fluid sent from the circulation pump. It can be defined as an operation control system used for

Specifically, this operation control system includes: a power outage detection section that detects a power outage in the power system in the fluid circulation device; an operation detection section that detects operation of an emergency power source that is activated in response to a power outage detection signal from the power outage detection section; A control unit that controls opening and closing of the automatic on-off valve.

Then, upon receiving the detection signal of the operation of the emergency power source from the operation detection section, the control section controls the automatic opening/closing valve to close. This blocks the flow of the processing liquid through the flow path piping between the circulation pump and the equipment located higher than the circulation pump, and the processing liquid is sent towards the equipment located at a higher position. can be prevented from flowing back into the circulation pump.

The configuration of the operation control system and the flow of control by the control unit that constitutes the operation control system are the same as those of the operation control unit 2 that constitutes the example fluid circulation device 1 described above, so a description thereof will be omitted here. .

The control unit of this operation control system may control the activation of each power load device including the circulation pump. When the circulation pump is started, the control unit controls the automatic on-off valve to open, so that the fluid sent from the circulation pump can be sent to equipment located at a higher location. It becomes possible. Further, by starting each power load device in stages so that the starting loads do not overlap, it is possible to prevent the starting loads from overlapping. The flow of start-up control of each power load device is the same as the flow when the above-mentioned operation control unit performs start-up control of each power load device, so a description thereof will be omitted here.

In addition, regarding such an operation control system, if it is a device that circulates fluid that has a circulation pump and an automatic opening/closing valve provided in the passage of the fluid sent from the circulation pump, the fluid used for electrolytic treatment can be used. The present invention is not limited to circulation devices, and can be applied to any device.

1 Fluid circulation device 11 Electrolytic cell 12 Storage tank 13 Circulation pump 14 Heat exchanger 15 Supply tank 16 Automatic opening/closing valve 2 Operation control section 21 Power outage detection section 22 Operation detection section 23 Control section 3 Emergency power supply

Claims (7)

A fluid circulation device equipped with a circulation pump that sends and circulates a fluid,
An automatic opening/closing valve is provided in the passage of the fluid sent from the circulation pump,
The automatic opening/closing valve operates in the event of a power outage in the power system of the fluid circulation device.
Controlled by a detection signal of a power outage in the power system and a detection signal of activation of an emergency power source activated by the detection of the power outage,
Fluid circulation device. The circulation pump is for sending and circulating fluid to a high position in the height direction of the equipment.
The fluid circulation device according to claim 1. a power outage detection unit that detects a power outage in the power system in the fluid circulation device;
an operation detection unit that detects operation of an emergency power source activated by a power outage detection signal from the power outage detection unit;
a control unit that controls opening and closing of the automatic on-off valve;
comprising an operation control unit comprising;
The fluid circulation device according to claim 1 or 2. In the operation control section,
Based on reception of an operation detection signal by the operation detection section, the control section controls the automatic opening/closing valve to be in a closed state.
The fluid circulation device according to claim 3. In the operation control section,
When starting the circulation pump, the control unit controls the automatic on-off valve to open.
The fluid circulation device according to claim 4. The fluid circulation device is
An electrolytic cell that performs electrolytic treatment,
a heat exchanger that adjusts the temperature of the fluid sent from the circulation pump;
Furthermore,
used for electrolytic treatment,
A fluid circulation device according to any one of claims 1 to 5. Operation used in a fluid circulation device that includes a circulation pump that sends and circulates fluid to a high position in the height direction of equipment and equipment, and an automatic opening/closing valve provided in a passage for the fluid sent from the circulation pump. A control system,
a power outage detection unit that detects a power outage in the power system in the fluid circulation device;
an operation detection unit that detects operation of an emergency power source activated by a power outage detection signal from the power outage detection unit;
a control unit that controls opening and closing of the automatic on-off valve;
Equipped with
An operation control system, wherein the control unit controls the automatic on-off valve to close when receiving a detection signal of the operation of the emergency power source from the operation detection unit.

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