CN116032019A - A rectification electric control device and method for an electric desalination system - Google Patents

Abstract

The invention relates to a rectification electric control device and method for an electric desalination system, comprising: a power supply, a device electrical control circuit, a rectification controller module and an on-site manual controller module; the power supply and the device electrical control The loop, the rectification controller module, and the local manual controller module are all electrically connected; wherein, the electrical control loop of the device includes a primary electrical circuit of the device and a secondary electrical circuit of the device. The beneficial effects of the present invention are: the present invention can realize the rapid emergency stop of the EDI system after receiving the system water supply and water cutoff signal, avoiding the occurrence of production accidents caused by the inability to cut off the DC current in the water cutoff state; in the remote control state, through the PLC The PID adjustment function of the system realizes the long-term stability of the resistivity of the water produced in the system, reduces the workload of the operating personnel, and can realize unattended operation.

Description

A rectification electric control device and method for an electric desalination system

technical field

The invention relates to the technical field of chemical water treatment electric desalination, more precisely, it relates to a rectifying electric control device and method for an electric desalination system.

Background technique

With the gradual promotion of chemical water treatment electric desalination (EDI) technology, the requirements for the integration and automation of EDI devices are getting higher and higher. In the current design, the current of the EDI rectifier controller is manually adjusted by the panel as the mainstream. The local panel displays the current value of the rectifier module to achieve the purpose of adjusting the current.

However, in the manual mode of the EDI device, the workload of the operator is heavy, and after remote automation is realized, unattended operation can be realized.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a rectification electric control device and method for an electric desalination system.

In the first aspect, a rectification electric control device for an electric desalination system is provided, including:

Power supply, device electrical control circuit, rectifier controller module, and local manual controller module; the power supply is electrically connected to the device electrical control circuit, rectifier controller module, and local manual controller module; wherein, all The electrical control circuit of the device includes a device electrical primary circuit and a device electrical secondary circuit; the rectification controller module includes a first rectification controller U1, a second rectification controller U3 and a third rectification controller U5; the on-site manual The controller module includes a first local manual controller U2, a second local manual controller U4 and a third local manual controller U6;

In the electrical primary circuit of the device, a primary circuit breaker Q1 and an AC contactor KM1 are set up to switch the power supply of the rectifier controller module, and a power-on indicator H1 is set between phases to indicate whether the rectifier controller module is is powered on;

In the electrical secondary circuit of the device, there is a secondary circuit breaker Q2 for switching on and off the secondary circuit power supply, the two-position knob S1 is used for switching local or remote control, and its normally open auxiliary contact is used for remote status Indication, the first illuminated button S2 is used to start the rectifier by local panel control, the second illuminated button S3 is used to stop the rectifier by local panel control, and the button S4 is connected in series to the first illuminated button S2, the second illuminated button S3 and the button S4 The self-locking circuit of the rectifier alarm is used for local panel control and reset; the coil of the first intermediate relay K1 is connected in series with the normally open contact of the water flow switch; the coils of the second intermediate relay K2, the third intermediate relay K3 and the fourth intermediate relay K4 The alarm normally open contacts of the first rectification controller U1, the second rectification controller U3 and the third rectification controller U5 are respectively connected in series, and one of the second intermediate relay K2, the third intermediate relay K3 and the fourth intermediate relay K4 Normally open contacts are used for self-locking, a pair of normally open contacts are connected in series to the circuits of the second indicator light D2, the third indicator light D3 and the fourth indicator light D4 for indication, and a pair of normally open contacts are used to output signals to In the remote control system, another pair of normally closed contacts are connected in series to the water cut-off ports of the first rectification controller U1, the second rectification controller U3 and the third rectification controller U5.

As a preference, the power supplies of the first rectification controller U1, the second rectification controller U3 and the third rectification controller U5 are respectively taken to the output side of the AC contactor KM1; the first rectification controller U1, the second rectification controller U3 and the Terminals 9 and 10 of the first terminal board JP1 of the third rectifier controller U5 are rectifier failure alarm output terminals, terminals 1 and 2 are input terminals for water cut-off and outage; terminals 1, 2, 3 and 4 of the second terminal board JP2 The terminal is the signal conversion terminal of the first local manual controller U2, the second local manual controller U4 and the third local manual controller U6; the third wiring terminal board JP3 is a power supply output terminal, connected by a cable to the EDI module;

Terminals 1 and 2 of the first local manual controller U2, second local manual controller U4 and third local manual controller U6 are power supply terminals, terminals 3 and 4 are remote current given terminals, 5 , 6, 7, 8 are terminals for exchanging signals with the rectifier controller.

Preferably, the rectification electric control device is reserved with an interface terminal for remote status monitoring and control.

Preferably, the power supply is an AC AC380V power supply.

In the second aspect, there is provided a rectification electric control method for an electric desalination system, which is performed by the rectification electric control device for an electric desalination system described in any one of the first aspects, including:

Step 1. Power on the system: close the primary circuit breaker Q1 and the secondary circuit breaker Q2, at this time the power-on indicator H1 is on, indicating that the power supply of the device has been powered on;

Step 2. System startup: Turn the two-position knob S1 to the local side, and manually adjust the DC output of the rectifier through the local hand-operated controller; after the commissioning is completed, turn the two-position knob S1 to the remote control side, and the PLC The system automatically adjusts the DC output of the rectifier through the local manual controller according to the given signal of the rectifier current;

Step 3. System shutdown: including protection shutdown, local shutdown and remote shutdown;

Step 3.1, protection shutdown: When the EDI water inlet flow switch detects insufficient flow and the water is cut off, the first intermediate relay K1 is energized, the auxiliary contact triggers the rectifier self-protection, and automatically cuts off the DC output; the first indicator light on the device is at D1 When any one of the 3 sets of rectifiers fails, terminals 9 and 10 of the first terminal board JP1 send short pulse signals to make the second intermediate relay K2, the third intermediate relay K3 or the fourth intermediate relay K4 Self-locking after power on, the second indicator light D2, the third indicator light D3 or the fourth indicator light D4 light up; at this time, the PLC system triggers the outage sequence control after receiving the rectifier fault signal, the remote side circuit loses power, and the AC contactor The KM1 coil loses power, the main contact is disconnected, the primary circuit is disconnected, the second illuminated button S3 lights up, the rectifier loses power, and the system shuts down;

Step 3.2. When the two-position knob S1 is on the local side, when the second illuminated button S3 is pressed, the coil of the AC contactor KM1 loses power, the main contact is disconnected, the primary circuit is disconnected, and the second illuminated button S3 indicates The lamp lights up, the rectifier loses power, and the system shuts down;

Step 3.3, remote shutdown: When the operator triggers the shutdown command on the upper computer, the PLC system triggers the shutdown sequence control, the remote side circuit loses power, the AC contactor KM1 coil loses power, the main contact is disconnected, and the primary circuit disconnect, the indicator light of the second illuminated button S3 lights up, the rectifier loses power, and the system shuts down.

Preferably, step 2 includes:

Step 2.1, manual start: Turn the two-position knob S1 to the local side, at this time the secondary circuit local side circuit is opened, press the first button S2 with light, the AC contactor KM1 coil is energized and closed, and the primary circuit The main contact of the AC contactor KM1 is closed, the auxiliary contact is closed to self-lock the secondary circuit, the primary circuit is energized, the indicator light of the first illuminated button S2 is lit, and the rectifier starts output after judging that the system is in a non-water-cut state, and the second The JP3 terminal of the three-wire terminal board outputs the default DC current to drive the EDI module to produce water. The resistivity of the produced water is detected by the resistivity meter on the water production pipeline of the EDI system to realize local and remote display; the operation and debugging personnel pass the resistivity meter To judge whether the resistivity of the outlet water meets the requirements, if it does not meet the requirements, use the up and down arrow buttons on the panels of the first local manual controller U2, the second local manual controller U4, and the third local manual controller U6 Manually adjust the DC output of the rectifier so that the resistivity of the water produced by the EDI system can reach the standard;

Step 2.2, remote start: After the system debugging is completed, switch to the automatic operation mode; turn the two-position knob S1 to the remote control side, at this time the secondary circuit remote control side circuit is opened, and the operator presses the start button on the upper computer , the PLC system sends a remote start long pulse command to terminals 7 and 8 of the X1 terminal block, the AC contactor KM1 coil is energized and closed, the primary circuit is energized, the indicator light of the first illuminated button S2 lights up, and the rectifier is judging After the system is in the non-cut state, the output is started, and the JP3 terminal of the third terminal board outputs the default DC current to drive the EDI module to produce water. The resistivity of the produced water is detected by the resistivity meter on the water production pipeline of the EDI system to realize local and remote display; the PLC system sends the 4-20mA rectifier current given signal to the first local Hand controller U2, the second on-site hand controller U4 and the third on-site hand controller U6 terminal 3, 4 to adjust the DC output size of the rectifier in real time, so that the resistivity of EDI produced water becomes more and more close to the initial target value in the PID regulator.

The beneficial effects of the present invention are: the present invention solves the requirement of remote unattended EDI system, and can realize the rapid emergency shutdown of the EDI system after receiving the system water supply and water cut-off signal, avoiding the failure of the DC current in the water cut-off state to cause production Accidents occur; in the remote control state, the long-term stability of the system water resistivity is realized through the PID adjustment function of the PLC system, which reduces the workload of the operating personnel and can be unattended.

Description of drawings

Figure 1 is an electrical control circuit diagram;

Fig. 2 is the schematic circuit diagram of the first rectification controller U1 and the first local manual controller U2;

Fig. 3 is the circuit schematic diagram of the second rectification controller U3 and the second local manual controller U4;

Fig. 4 is the schematic circuit diagram of the third rectification controller U5 and the third local manual controller U6;

Explanation of reference signs: primary circuit breaker Q1, secondary circuit breaker Q2, AC contactor KM1, two-position knob S1, first illuminated button S2, second illuminated button S3, button S4, first intermediate relay K1 , the second intermediate relay K2, the third intermediate relay K3, the fourth intermediate relay K4, the first rectification controller U1, the second rectification controller U3, the third rectification controller U5, the first local manual controller U2, The second on-site manual controller U4, the third on-site manual controller U6, the first indicator light D1, the second indicator light D2, the third indicator light D3, the fourth indicator light D4, the power-on indicator H1, the second indicator light A terminal board JP1, a second terminal board JP2, and a third terminal board JP3.

Detailed ways

The present invention will be further described below in conjunction with the examples. The description of the following examples is provided only to aid the understanding of the present invention. It should be pointed out that for those skilled in the art, some modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Example 1:

A rectifying electric control device for an electric desalination system, as shown in Figure 1, including:

Power supply, device electrical control circuit, rectifier controller module and local manual controller module; power supply is AC380V power supply, power supply and device electrical control circuit, rectifier controller module, local manual controller module connection; wherein, the device electrical control circuit includes the device electrical primary circuit and the device electrical secondary circuit; the rectification controller module includes the first rectification controller U1, the second rectification controller U3 and the third rectification controller U5; on-site manual operation The controller module includes a first local manual controller U2, a second local manual controller U4 and a third local manual controller U6;

In the electrical primary circuit of the device, a primary circuit breaker Q1 and an AC contactor KM1 are set up to switch the power supply of the rectifier controller module, and a power-on indicator H1 is set between phases to indicate whether the rectifier controller module is powered on state;

In the electrical secondary circuit of the device, there is a secondary circuit breaker Q2 for switching on and off the secondary circuit power supply, the two-position knob S1 is used for switching local or remote control, and its normally open auxiliary contact is used for remote status indication. The first illuminated button S2 is used to start the rectifier by local panel control, the second illuminated button S3 is used to stop the rectifier by local panel control, and the button S4 is connected in series to the first illuminated button S2, the second illuminated button S3 and the button S4. The lock circuit is used for rectifier alarm local panel control reset; the coil of the first intermediate relay K1 is connected in series with the normally open contact of the water flow switch; the coils of the second intermediate relay K2, the third intermediate relay K3 and the fourth intermediate relay K4 are respectively connected in series The alarm normally open contacts of the first rectifier controller U1, the second rectifier controller U3 and the third rectifier controller U5, one of the second intermediate relay K2, the third intermediate relay K3 and the fourth intermediate relay K4 is normally open The contacts are used for self-locking, a pair of normally open contacts are connected in series to the circuit of the second indicator light D2, the third indicator light D3 and the fourth indicator light D4 for indication, and a pair of normally open contacts are used to output signals to the remote end In the control system, another pair of normally closed contacts are connected in series to the water cut-off shutdown ports of the first rectification controller U1, the second rectification controller U3 and the third rectification controller U5.

As shown in Figure 2-Figure 4, the power supplies of the first rectification controller U1, the second rectification controller U3 and the third rectification controller U5 are respectively taken to the output side of the AC contactor KM1; the first rectification controller U1, the second rectification controller U5 Terminals 9 and 10 of the first connection terminal board JP1 of the second rectification controller U3 and the third rectification controller U5 are rectifier fault alarm output terminals, and terminals 1 and 2 are input terminals for water failure and outage; 1 of the second connection terminal board JP2 , Terminals 2, 3 and 4 are the signal conversion terminals of the first local manual controller U2, the second local manual controller U4 and the third local manual controller U6; the third terminal board JP3 is the power supply Output terminal, connected to the EDI module through a cable;

Terminals 1 and 2 of the first local manual controller U2, second local manual controller U4 and third local manual controller U6 are power supply terminals, terminals 3 and 4 are remote current given terminals, 5 , 6, 7, 8 are terminals for exchanging signals with the rectifier controller.

In addition, the rectifier electronic control device is reserved with interface terminals for remote status monitoring and control.

In this embodiment, the electrical control circuit includes the control of 3 sets of rectifier controllers, which can be adjusted according to specific conditions when the system needs more.

Example 2:

A method for installing a rectification electric control device for an electric desalination system, comprising:

Step 1. Install the rectifier electric control device used in the electric desalination system on the electric desalination carriage, and connect to the power supply through the cable;

In step 1, whether the power supply of the electric control device is normal is displayed on the panel of the device through the power-on indicator H1, and the power supply is AC380V power supply;

Step 2. Connect the #1EDI module to the terminals 1 and 2 of the X3 terminal block through the cable, and the terminal 1 is the positive pole; connect the #2EDI module to the 7 and 8 terminals of the X3 terminal block through the cable, where Terminal 7 is the positive pole; connect the #3EDI module to terminals 13 and 14 of the X3 terminal block through cables, and terminal 13 is the positive pole; connect the remaining signals of the X1 terminal block to the remote programmable In the controller (PLC);

Step 3. Connect the normally open contact of the water inlet flow switch of the EDI system to terminals 9 and 10 of the X1 terminal block;

Step 4. Close the circuit breaker Q1 of the primary circuit. At this time, the indicator light H1 is on, and the primary circuit is already in the energized state.

Step 5. Close the secondary circuit breaker Q2, and the secondary circuit is already in the energized state at this time.

Example 3:

A rectification electric control method for an electric desalination system, performed by a rectification electric control device for an electric desalination system, comprising:

Step 1. Power on the system: close the primary circuit breaker Q1 and the secondary circuit breaker Q2, at this time the power-on indicator H1 is on, indicating that the power supply of the device has been powered on;

Step 2. System startup: Turn the two-position knob S1 to the local side, and manually adjust the DC output of the rectifier through the local hand-operated controller; after the commissioning is completed, turn the two-position knob S1 to the remote control side, and the PLC The system automatically adjusts the DC output of the rectifier through the local manual controller according to the given signal of the rectifier current;

Step 2 includes:

Step 2.1, manual start: Turn the two-position knob S1 to the local side, at this time the secondary circuit local side circuit is opened, press the first button S2 with light, the AC contactor KM1 coil is energized and closed, and the primary circuit The main contact of the AC contactor KM1 is closed, the auxiliary contact is closed to self-lock the secondary circuit, the primary circuit is energized, the indicator light of the first illuminated button S2 is lit, and the rectifier starts output after judging that the system is in a non-water-cut state, and the second The JP3 terminal of the three-wire terminal board outputs the default DC current to drive the EDI module to produce water. The resistivity of the produced water is detected by the resistivity meter on the water production pipeline of the EDI system to realize local and remote display; the operation and debugging personnel pass the resistivity meter To judge whether the resistivity of the outlet water meets the requirements, if it does not meet the requirements, use the up and down arrow buttons on the panels of the first local manual controller U2, the second local manual controller U4, and the third local manual controller U6 Manually adjust the DC output of the rectifier so that the resistivity of the water produced by the EDI system can reach the standard;

Step 2.2, remote start: After the system debugging is completed, switch to the automatic operation mode; turn the two-position knob S1 to the remote control side, at this time the secondary circuit remote control side circuit is opened, and the operator presses the start button on the upper computer , the PLC system sends a remote start long pulse command to terminals 7 and 8 of the X1 terminal block, the AC contactor KM1 coil is energized and closed, the primary circuit is energized, the indicator light of the first illuminated button S2 lights up, and the rectifier is judging After the system is in the non-cut state, the output is started, and the JP3 terminal of the third terminal board outputs the default DC current to drive the EDI module to produce water. The resistivity of the produced water is detected by the resistivity meter on the water production pipeline of the EDI system to realize local and remote display; the PLC system sends the 4-20mA rectifier current given signal to the first local Hand controller U2, the second on-site hand controller U4 and the third on-site hand controller U6 terminal 3, 4 to adjust the DC output size of the rectifier in real time, so that the resistivity of EDI produced water becomes more and more Close to the initial target value in the PID regulator to achieve the purpose of automatic operation of the system.

Step 3. System shutdown: including protection shutdown, local shutdown and remote shutdown;

Step 3 includes:

Step 3.1, protection shutdown: When the EDI water inlet flow switch detects insufficient flow and the water is cut off, the first intermediate relay K1 is energized, the auxiliary contact triggers the rectifier self-protection, and automatically cuts off the DC output; the first indicator light on the device is at D1 When any one of the 3 sets of rectifiers fails, terminals 9 and 10 of the first terminal board JP1 send short pulse signals to make the second intermediate relay K2, the third intermediate relay K3 or the fourth intermediate relay K4 Self-locking after power on, the second indicator light D2, the third indicator light D3 or the fourth indicator light D4 light up, which is convenient for the operator to judge which rectifier is faulty; at this time, the PLC system triggers the outage sequence control after receiving the rectifier fault signal , the remote side circuit loses power, the AC contactor KM1 coil loses power, the main contact is disconnected, the primary circuit is disconnected, the second illuminated button S3 lights up, the rectifier loses power, and the system shuts down;

Step 3.2. When the two-position knob S1 is on the local side, when the second illuminated button S3 is pressed, the coil of the AC contactor KM1 loses power, the main contact is disconnected, the primary circuit is disconnected, and the second illuminated button S3 indicates The lamp lights up, the rectifier loses power, and the system shuts down;

Step 3.3, remote shutdown: When the operator triggers the shutdown command on the upper computer, the PLC system triggers the shutdown sequence control, the remote side circuit loses power, the AC contactor KM1 coil loses power, the main contact is disconnected, and the primary circuit disconnect, the indicator light of the second illuminated button S3 lights up, the rectifier loses power, and the system shuts down.

Claims (6)

1. A rectification electric control device for an electric desalination system, characterized in that it includes: a power supply, a device electrical control circuit, a rectification controller module and an on-site manual controller module; the power supply and the device electrical The control loop, the rectification controller module, and the local manual controller module are all electrically connected; wherein, the electrical control loop of the device includes a primary electrical circuit of the device and a secondary electrical circuit of the device; the rectification controller module includes a first rectification control U1, the second rectification controller U3 and the third rectification controller U5; the local manual controller module includes the first local manual controller U2, the second local manual controller U4 and the third local manual controller Ground hand controller U6; In the electrical primary circuit of the device, a primary circuit breaker Q1 and an AC contactor KM1 are set up to switch the power supply of the rectifier controller module, and a power-on indicator H1 is set between phases to indicate whether the rectifier controller module is is powered on; In the electrical secondary circuit of the device, there is a secondary circuit breaker Q2 for switching on and off the secondary circuit power supply, the two-position knob S1 is used for switching local or remote control, and its normally open auxiliary contact is used for remote status Indication, the first illuminated button S2 is used to start the rectifier by local panel control, the second illuminated button S3 is used to stop the rectifier by local panel control, and the button S4 is connected in series to the first illuminated button S2, the second illuminated button S3 and the button S4 The self-locking circuit of the rectifier alarm is used for local panel control and reset; the coil of the first intermediate relay K1 is connected in series with the normally open contact of the water flow switch; the coils of the second intermediate relay K2, the third intermediate relay K3 and the fourth intermediate relay K4 The alarm normally open contacts of the first rectification controller U1, the second rectification controller U3 and the third rectification controller U5 are respectively connected in series, and one of the second intermediate relay K2, the third intermediate relay K3 and the fourth intermediate relay K4 Normally open contacts are used for self-locking, a pair of normally open contacts are connected in series to the circuits of the second indicator light D2, the third indicator light D3 and the fourth indicator light D4 for indication, and a pair of normally open contacts are used to output signals to In the remote control system, another pair of normally closed contacts are connected in series to the water cut-off ports of the first rectification controller U1, the second rectification controller U3 and the third rectification controller U5. 2. The rectification electric control device for the electric desalination system according to claim 1, wherein the power supplies of the first rectification controller U1, the second rectification controller U3 and the third rectification controller U5 are respectively taken from The output side of the AC contactor KM1; terminals 9 and 10 of the first terminal board JP1 of the first rectification controller U1, the second rectification controller U3 and the third rectification controller U5 are rectifier fault alarm output terminals, 1 and 2 The terminal is the input terminal of water cut-off; the terminals 1, 2, 3, and 4 of the second terminal board JP2 are the first local manual controller U2, the second local manual controller U4 and the third local manual controller. The signal conversion terminal of the controller U6; the third terminal board JP3 is a power supply output terminal, which is connected to the EDI module through a cable; Terminals 1 and 2 of the first local manual controller U2, second local manual controller U4 and third local manual controller U6 are power supply terminals, terminals 3 and 4 are remote current given terminals, 5 , 6, 7, 8 are terminals for exchanging signals with the rectifier controller. 3. The rectification electric control device for the electric desalination system according to claim 2, characterized in that the rectification electric control device is reserved with an interface terminal for remote state monitoring and control. 4 . The rectifying electric control device for an electric desalination system according to claim 3 , wherein the power supply is an AC 380V power supply. 5. A rectification electric control method for an electric desalination system, characterized in that it is performed by the rectification electric control device for an electric desalination system according to any one of claims 1 to 4, comprising: Step 1. Power on the system: close the primary circuit breaker Q1 and the secondary circuit breaker Q2, at this time the power-on indicator H1 is on, indicating that the power supply of the device has been powered on; Step 2. System startup: Turn the two-position knob S1 to the local side, and manually adjust the DC output of the rectifier through the local hand-operated controller; after the commissioning is completed, turn the two-position knob S1 to the remote control side, and the PLC The system automatically adjusts the DC output of the rectifier through the local manual controller according to the given signal of the rectifier current; Step 3. System shutdown: including protection shutdown, local shutdown and remote shutdown; Step 3.1, protection shutdown: When the EDI water inlet flow switch detects insufficient flow and the water is cut off, the first intermediate relay K1 is energized, the auxiliary contact triggers the rectifier self-protection, and automatically cuts off the DC output; the first indicator light on the device is at D1 When any one of the 3 sets of rectifiers fails, terminals 9 and 10 of the first terminal board JP1 send short pulse signals to make the second intermediate relay K2, the third intermediate relay K3 or the fourth intermediate relay K4 Self-locking after power on, the second indicator light D2, the third indicator light D3 or the fourth indicator light D4 light up; at this time, the PLC system triggers the outage sequence control after receiving the rectifier fault signal, the remote side circuit loses power, and the AC contactor The KM1 coil loses power, the main contact is disconnected, the primary circuit is disconnected, the second illuminated button S3 lights up, the rectifier loses power, and the system shuts down; Step 3.2. When the two-position knob S1 is on the local side, when the second illuminated button S3 is pressed, the coil of the AC contactor KM1 loses power, the main contact is disconnected, the primary circuit is disconnected, and the second illuminated button S3 indicates The lamp lights up, the rectifier loses power, and the system shuts down; Step 3.3, remote shutdown: When the operator triggers the shutdown command on the upper computer, the PLC system triggers the shutdown sequence control, the remote side circuit loses power, the AC contactor KM1 coil loses power, the main contact is disconnected, and the primary circuit disconnect, the indicator light of the second illuminated button S3 lights up, the rectifier loses power, and the system shuts down. 6. A rectification and electric control method for an electric desalination system according to claim 5, wherein step 2 comprises: Step 2.1, manual start: Turn the two-position knob S1 to the local side, at this time the secondary circuit local side circuit is opened, press the first button S2 with light, the AC contactor KM1 coil is energized and closed, and the primary circuit The main contact of the AC contactor KM1 is closed, the auxiliary contact is closed to self-lock the secondary circuit, the primary circuit is energized, the indicator light of the first illuminated button S2 is lit, and the rectifier starts output after judging that the system is in a non-water-cut state, and the second The JP3 terminal of the three-wire terminal board outputs the default DC current to drive the EDI module to produce water. The resistivity of the produced water is detected by the resistivity meter on the water production pipeline of the EDI system to realize local and remote display; the operation and debugging personnel pass the resistivity meter To judge whether the resistivity of the outlet water meets the requirements, if it does not meet the requirements, use the up and down arrow buttons on the panels of the first local manual controller U2, the second local manual controller U4, and the third local manual controller U6 Manually adjust the DC output of the rectifier so that the resistivity of the water produced by the EDI system can reach the standard; Step 2.2, remote start: After the system debugging is completed, switch to the automatic operation mode; turn the two-position knob S1 to the remote control side, at this time the secondary circuit remote control side circuit is opened, and the operator presses the start button on the upper computer , the PLC system sends a remote start long pulse command to terminals 7 and 8 of the X1 terminal block, the AC contactor KM1 coil is energized and closed, the primary circuit is energized, the indicator light of the first illuminated button S2 lights up, and the rectifier is judging After the system is in the non-cut state, the output is started, and the JP3 terminal of the third terminal board outputs the default DC current to drive the EDI module to produce water. The resistivity of the produced water is detected by the resistivity meter on the water production pipeline of the EDI system to realize local and remote display; the PLC system sends the 4-20mA rectifier current given signal to the first local Hand controller U2, the second on-site hand controller U4 and the third on-site hand controller U6 terminal 3, 4 to adjust the DC output size of the rectifier in real time, so that the resistivity of EDI produced water becomes more and more close to the initial target value in the PID regulator.

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