CN111736501A - A kind of gas intrusion monitoring and exhaust device for cooling water system of power plant and method thereof - Google Patents

Abstract

The invention discloses a gas intrusion monitoring and exhausting device and an exhausting method for a cooling water system of a power plant, comprising a gas monitoring chamber, the bottom end of the gas monitoring chamber is connected to a gas collecting chamber through an upper flange, and the top of the gas monitoring chamber is sequentially connected with an electric valve and the exhaust pipe, and the gas monitoring chamber is also electrically connected with the controller; the gas intrusion monitoring and exhaust device for the cooling water system of the power plant according to the present invention can effectively collect the gas by setting the gas collecting chamber, which is helpful for the smooth removal of the gas ;By setting magnets, reed switches and controllers, the position of the float ball can be monitored at any time, so as to determine whether there is gas entering during operation; through the settings of the electric valve and the controller, it is ensured that the opening and closing of the electric valve can be remotely operated, so that the system can be opened and closed. Smooth exhaust; the exhaust method of the present invention has simple operation, solves the problem of effective monitoring and automatic discharge of invading gas from the cooling water system, and has good practical value.

Description

A kind of gas intrusion monitoring and exhaust device for cooling water system of power plant and method thereof

technical field

The invention belongs to the field of cooling water systems of power plants, in particular to a gas intrusion monitoring and exhaust device for cooling water systems of power plants, and also relates to a gas intrusion monitoring and exhaust method for cooling water systems of power plants.

Background technique

In the field of power generation, there are two types of cooling water in thermal power plants: closed cooling water and open cooling water.

Thermal power plants rely on closed-circuit cooling water to cool auxiliary equipment for boilers, steam turbines and generators. The closed cooling water is connected to the three major systems of machine, furnace and electricity at the same time, and its failure has an extremely adverse impact on the operation of the overall system equipment, and may cause downtime in severe cases; considering the economy, some power plants will use open cooling water to cool some boilers, Auxiliary equipment for steam turbines and generators.

Air compressors (referred to as air compressors) are important auxiliary equipment in power plants. High-power air compressors are generally cooled by cooling water. In the process of air compression, the water liquefies, and under the action of other impurities, the inner wall of the air compressor cooler is continuously corroded, which may erode through the inner wall of the cooler, resulting in the intrusion of high-pressure gas into the cooling water system.

When the cooling water system invades a certain amount of gas, it will cause the cooling water pressure to fluctuate, which will affect the work of each auxiliary cooler and cause operational risks. Up to now, there have been many water leakage faults in the air compressor cooler in China, causing gas to invade the cooling water system. The gas causes pressure fluctuations and accumulates in the local high position of the cooling water system, such as in the external water pipe of the hydrogen cooler of the generator, forming a gas plug, which seriously affects the normal operation of the hydrogen cooler.

Once the cooling water gas intrusion problem occurs, it will take a long time to find the fault point, and the on-site staff need to check multiple devices to determine it; some thermal power plants have experienced fault points, but the fault point has not yet been determined, but the unit has tripped. situation.

SUMMARY OF THE INVENTION

The first object of the present invention is to provide an exhaust device for monitoring the gas intrusion of the cooling water system of a power plant, which solves the problem that the existing equipment cannot discharge the invading gas from the cooling water system.

The second object of the present invention is to provide a method for monitoring the exhaust gas intrusion of gas in the cooling water system of a power plant.

The first technical solution adopted by the present invention is that a gas intrusion monitoring and exhaust device for a cooling water system of a power plant includes a gas monitoring chamber, the bottom end of the gas monitoring chamber is connected to the gas collecting chamber through an upper flange, and the top of the gas monitoring chamber is sequentially An electric valve and an exhaust pipe are connected, and the gas monitoring chamber is also electrically connected with the controller.

The present invention is also characterized in that,

The gas monitoring chamber includes a circular frustum-shaped upper casing and an inverted bell-shaped lower casing;

The center of the upper shell is provided with a cylindrical inner channel, and the inner wall of the inner channel is provided with a magnet that can move relative to the vertical direction, and along the radial direction of the upper shell are also provided with reed switches a and b, reed switches a, reed switches Both the pipe b and the electric valve are electrically connected to the controller;

The bottom end of the inner channel is also provided with a ventilation fixing piece;

A vertical connecting rod is arranged in the lower casing, one end of the connecting rod is connected with the floating ball, and the other end of the connecting rod is fixedly connected with the magnet.

The reed switch a and the reed switch b are respectively located at the upper and lower ends of the upper casing.

A sealing ring is also arranged at the contact between the upper casing and the lower casing.

The controller includes a single-chip microcomputer, the single-chip microcomputer is electrically connected with the isolation optocoupler a and the isolation optocoupler b, the isolation optocoupler a is electrically connected with the reed switch a, and the isolation optocoupler b is electrically connected with the reed switch b;

The single-chip microcomputer is also electrically connected with the power amplifying module and the electric valve in sequence;

The single-chip microcomputer is also electrically connected with the EEPROM module, the key and display module and the 485 communication module in sequence, and the 485 communication module is electrically connected with the DCS system.

The microcontroller model is STM32F407;

Both the isolated optocoupler a and the isolated optocoupler b use the isolated optocoupler chip model TLP521;

The power amplifying module specifically includes a relay whose model is JQX-62F-2Z.

The EEPROM module adopts EEPROM chip, and the EEPROM chip model is AT25256;

The key and display module includes an LCD control chip, and the LCD control chip model is ILI9320;

The 485 communication module includes the 485 communication chip whose model is ADM3485E.

The second technical solution adopted by the present invention is a method for monitoring and exhausting gas intrusion in a cooling water system of a power plant, comprising the following steps:

Step 1. Before the cooling water system is put into operation, initialize the gas intrusion monitoring and exhaust device

Open the electric valve, the gas accumulated in the gas intrusion monitoring exhaust device is discharged from the inner channel and the exhaust pipe through the ventilating fixture, and the floating ball floats up and contacts the sealing ring under the action of the buoyancy of the cooling water. At this time, the connecting rod drives the magnet Approach the reed switch a and make the reed switch a pull in, the reed switch a pull-in action information enters the microcontroller through the isolation optocoupler a, the reed switch a action information is stored in the EEPROM module, and the reed switch a action information It is transmitted to the DCS system through the 485 communication module. At this time, the electric valve is closed;

Step 2: After initialization, the cooling water system is put into operation

When there is no gas in the cooling water entering the gas collection chamber, the gas intrusion monitoring exhaust device is filled with liquid. At this time, the electric valve is closed, the floating ball floats and is at the top of the lower shell, and is in close contact with the sealing ring. The rod drives the magnet close to the reed switch a and makes the reed switch a pull in for a long time. The reed switch a pull-in state information enters the microcontroller through the isolation optocoupler a, and the state information of the reed switch a is stored in the EEPROM module. The status information of the reed pipe a is regularly transmitted to the DCS system through the 485 communication module;

When there is gas in the cooling water entering the gas collection chamber, the gas enters the inner channel through the ventilating fixture. As the gas gradually increases, the floating ball is forced to move downward, and the magnet also moves downward under the action of the floating ball and the connecting rod. When the magnet is close to the reed switch b and the reed switch b is pulled in, the action information of the reed switch b enters the microcontroller through the isolation optocoupler b, and the action information of the reed switch b is stored in the EEPROM module. At this time, the reed switch b moves The information is transmitted to the DCS system through the 485 communication module, and fed back to the operator. At the same time, the single-chip microcomputer controls the electric valve to open through the power amplification module, and the gas is discharged. At the same time, the float, connecting rod and magnet gradually rise with the liquid level. Reed switch a is pulled in, and the reed switch a’s action information enters the microcontroller through the isolation optocoupler a, the reed switch a action information is stored in the EEPROM module, and the reed switch a action information is transmitted to the DCS system through the 485 communication module. The single-chip microcomputer controls the electric valve to close through the power amplification module, and the device returns to the state of no gas intrusion.

The beneficial effects of the invention are as follows: the gas intrusion monitoring and exhaust device of the cooling water system of the power plant according to the present invention can effectively collect the gas by setting the gas collecting chamber, which is helpful for the smooth removal of the gas; by setting the magnet, the reed switch and the The controller ensures that the position of the floating ball can be monitored at any time, so as to determine whether there is gas entering during the operation; the setting of the electric valve and the controller ensures that the opening and closing of the electric valve can be remotely operated, so that the system can be exhausted smoothly; the exhaust of the present invention The method is simple to operate, solves the problems of effective monitoring and automatic discharge of invading gas from the cooling water system, and has good practical value.

Description of drawings

1 is a schematic structural diagram of a gas intrusion monitoring exhaust device for a cooling water system of a power plant according to the present invention;

2 is a schematic structural diagram of a controller in a power plant cooling water system gas intrusion monitoring exhaust device of the present invention;

FIG. 3 is a state diagram of a use state of a gas intrusion monitoring exhaust device in a cooling water system of a power plant according to the present invention.

In the figure, 1. Gas collection chamber, 1-1. Side flange, 1-2. Upper flange, 2. Gas monitoring chamber, 2-1. Upper shell, 2-2. Lower shell, 2-3 .Float, 2-4. Connecting rod, 2-5. Magnet, 2-6. Sealing ring, 2-7. Breathable fixing piece, 2-8. Reed switch a, 2-9. Reed switch b, 2-10. Inner channel, 3. Electric valve, 4. Controller, 5. Exhaust pipe, 6. EEPROM module, 7. Microcontroller, 8. Isolated optocoupler a, 9. Isolated optocoupler b, 10.485 communication module, 11. DCS system, 12. Button and display module, 13. Power amplifier module;

011-cooling water pump one, 012-cooling water pump two, 021-cooling water cooler one, 022-cooling water cooler two, 031-air compressor cooler one, 032-air compressor cooler two, 0311-air compressor Air inlet valve of machine cooler, 0312-air compressor cooling water outlet valve, 0321-air compressor cooler second water inlet valve, 0322-air compressor cooler second water outlet valve, 041-gas intrusion of power plant cooling water system Monitoring exhaust device 1, 042-gas intrusion monitoring exhaust device of cooling water system of power plant 2, 051-generator hydrogen cooler 1, 052-generator hydrogen cooler 2.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

A gas intrusion monitoring and exhaust device for a cooling water system of a power plant of the present invention, as shown in FIG. 1, includes a gas monitoring chamber 2, the bottom end of the gas monitoring chamber 2 is connected to the gas collecting chamber 1 through the upper flange 1-2, and the gas monitoring chamber The top end is connected with an electric valve 3 and an exhaust pipe 5 in sequence, and the gas monitoring chamber 2 is also electrically connected with the controller 4 . The controller 4 is used to receive the pull-in signal of the reed switch a2-8 and the reed switch b2-8 in the gas monitoring room 2, control the switch of the electric valve 3, and issue a gas intrusion alarm.

Electric valve 3 adopts electric ball valve with signal feedback.

Both ends of the gas collection chamber 1 are connected to the external water pipes through side flanges 1-1;

The gas monitoring chamber 2 includes a circular frustum-shaped upper casing 2-1 and an inverted bell-shaped lower casing 2-2;

The center of the upper casing 2-1 is provided with a cylindrical inner channel 2-10, the inner wall of the inner channel 2-10 is provided with a magnet 2-5 that can move relative to the vertical direction, and a dry spring is also arranged along the radial direction of the upper casing 2-1 Tube a2-8 and reed switch b2-9, reed switch a2-8, reed switch b2-9 and electric valve 3 are all electrically connected to controller 4;

The bottom end of the inner channel 2-10 is also provided with a ventilation fixing member 2-7;

The lower casing 2-2 is provided with a vertical connecting rod 2-4, one end of the connecting rod 2-4 is connected to the floating ball 2-3, and the other end of the connecting rod 2-4 is connected to the magnet 2 through the ventilation fixing member 2-7 -5.

The reed switch a2-8 and the reed switch b2-9 are located at the upper and lower ends of the upper casing 2-1 respectively. The reed switch a2-8 and the reed switch b2-8 are respectively attracted to the magnet 2-5, indicating that the gas Monitor the position of the gas in chamber 2 and issue a gas intrusion alarm.

A sealing ring 2-6 is also provided at the contact point between the upper casing 2-1 and the lower casing 2-2, so as to ensure that the gas monitoring chamber 2 is sealed and airtight.

As shown in FIG. 2 , the controller 4 includes a single-chip microcomputer 7. The single-chip microcomputer 7 is electrically connected to the isolation optocoupler a8 and the isolation optocoupler b9 respectively, the isolation optocoupler a8 is electrically connected to the reed switches a2-8, and the isolation optocoupler b9 is electrically connected to Reed switch b2-9 phase electrical connection;

The single chip 7 is also electrically connected to the power amplification module 13 and the electric valve 3 in sequence;

The single chip 7 is also electrically connected to the EEPROM module 6 , the button and the display module 12 and the 485 communication module 10 in sequence, and the 485 communication module 10 is electrically connected to the DCS system 11 .

The type of the single-chip microcomputer 7 is STM32F407; the isolation optocoupler a8 and the isolation optocoupler b9 both use the isolation optocoupler chip of the type TLP521; the power amplifier module 13 specifically includes a relay of the type JQX-62F-2Z.

The EEPROM module 6 adopts EEPROM chip, and the EEPROM chip model is AT25256; the key and display module 12 includes an LCD control chip, and the LCD control chip model is ILI9320; the 485 communication module 10 includes a 485 communication chip whose model is ADM3485E.

Reed switch a2-8 and reed switch b2-9 are used to sense the liquid level inside the device. When the magnet 2-5 is close to the reed switch a2-8 and the reed switch b2-9, it will attract it. The pull-in of reed switch a2-8 indicates that the liquid has reached the highest position, indicating that there is no gas inside the device; the pull-in of reed switch b2-9 indicates that the liquid has reached the lowest position, indicating that the gas inside the device is full.

The isolation optocoupler is used to send the reed switch signal to the microcontroller under the premise of electrical isolation. The pull-in state information of the reed switches a2-8 is sent to the microcontroller 7 through the isolation optocoupler a8, and the pull-in state information of the reed switches b2-9 is sent to the microcontroller 7 through the isolation optocoupler b9.

The 485 communication module 10 is used for communication between the microcontroller 7 and the DCS system 11 .

The power amplifying module 13 is used to amplify the control signal of the low-power electric valve 3 sent by the single-chip microcomputer 7 to control the opening and closing of the electric valve 3 .

The button and display module 12 is a man-machine interface, which is used for local status display and parameter setting.

The button and display module 12 is used for local display and setting of the state of the device.

The EEPROM chip 6 is used to store manually set parameters and information such as the action history of the reed switches a2-8 and the reed switches b2-9.

The single chip microcomputer 7 is used to send the action information of the reed switch a2-8 and the reed switch b2-9 to the DCS system 11 through the 485 communication module 10, and control the switch of the electric valve 3, so as to realize the monitoring and discharge of the gas in the cooling water system.

The present invention is a method for monitoring and exhausting gas intrusion in a cooling water system of a power plant:

Step 1. Before the cooling water system is put into operation, initialize the gas intrusion monitoring and exhaust device

Open the electric valve 3, the gas accumulated in the gas intrusion monitoring exhaust device is discharged from the inner channel 2-10 and the exhaust pipe 5 through the ventilation fixing member 2-7, and the floating ball 2-3 floats up under the buoyancy of the cooling water. Contact with the sealing ring 2-6, at this time, the connecting rod 2-4 drives the magnet 2-5 to approach the reed switch a2-8 and makes the reed switch a2-8 pull in, and the pull-in action information of the reed switch a2-8 is isolated through isolation The optocoupler a8 enters the microcontroller 7, the action information of the reed switch a2-8 is stored in the EEPROM module 6, and the action information of the reed switch a2-8 is transmitted to the DCS system 11 through the 485 communication module 10. At this time, the electric valve 3 is closed. ;

Step 2: After initialization, the cooling water system is put into operation

When there is no gas in the cooling water entering the gas collection chamber 1, the gas intrudes into the monitoring exhaust device and is filled with liquid. At this time, the electric valve 3 is closed, and the floating ball 2-3 floats up and is at the top of the lower shell 2-2, and is connected to the inner top of the lower shell 2-2. The sealing ring 2-6 is in close contact. At this time, the connecting rod 2-4 drives the magnet 2-5 to approach the reed switch a2-8 and makes the reed switch a2-8 pull in for a long time, and the reed switch a2-8 pulls in state information Entering the single-chip microcomputer 7 through the isolation optocoupler a8, the state information of the reed switch a2-8 is stored in the EEPROM module 6, and the state information of the reed switch a2-8 is periodically transmitted to the DCS system 11 through the 485 communication module 10;

When the cooling water entering the gas collection chamber 1 carries gas, the gas enters the inner channel 2-10 through the ventilation fixing member 2-7. As the gas gradually increases, the floating ball 2-3 is forced to move downward, and the magnet 2-5 is floating. The ball 2-3 and the connecting rod 2-4 also move downward. When the magnet 2-5 is close to the reed switch b2-9 and the reed switch b2-9 is pulled in, the action information of the reed switch b2-9 will be displayed. Enter the single-chip microcomputer 7 through the isolation optocoupler b9, and the action information of the reed switch b2-9 is stored in the EEPROM module 6. At this time, the action information of the reed switch b2-9 is transmitted to the DCS system 11 through the 485 communication module 10, and fed back to the operator At the same time, the single-chip microcomputer 7 controls the electric valve 3 to open through the power amplification module 13, and the gas is discharged while the float 2-3, the connecting rod 2-4 and the magnet 2-5 gradually rise with the liquid level. -8 pull-in, the pull-in action information of the reed switch a2-8 enters the microcontroller 7 through the isolation optocoupler a8, the action information of the reed switch a2-8 is stored in the EEPROM module 6, and the action information of the reed switch a2-8 passes through The 485 communication module 10 is transmitted to the DCS system 11, the single-chip microcomputer 7 controls the electric valve 3 to close through the power amplification module 13, and the device returns to a state without gas intrusion.

When a large amount of gas in the cooling water system continuously invades and is collected by the gas collection chamber 1, the floating ball 2-3 fluctuates up and down with the invading gas, and the suction state of the reed switch a2-8 and the reed switch b2-9 changes frequently; To prevent severe gas intrusion from adversely affecting the device of the present invention, the EEPROM module 6 is provided with the minimum time T _ONMIN of the electric valve 3 to open and the minimum time T _OFFMIN of the electric valve to close the electric valve, which can be set through the buttons and the display module 12 or the DCS system.

When the electric valve 3 is opened until the time reaches T _ONMIN , regardless of the signal state of the reed switch a2-8 and the reed switch b2-9, the electric valve 3 is forced to open.

When the electric valve 3 is closed until the time reaches T _OFFMIN , regardless of the signal status of the reed switch a2-8 and the reed switch b2-9, the electric valve 3 is forcibly closed.

Example

As shown in Figure 3, the cooling water is driven by the cooling water pump 1 011 and the cooling water pump 2 012, cooled by the cooling water cooler 1 021 and the cooling water cooler 2 022, and then sent to each cooler, specifically including the cooling of the air compressor. Air compressor 1 031, air compressor cooler 2 032, generator hydrogen cooler 1 051 and generator hydrogen cooler 2 052, etc.; the return water of each cooler enters cooling water pump 1 011 and cooling water pump 2 012 again.

The gas intrusion monitoring and exhaust device 1 041 of the cooling water system of the power plant and the gas intrusion monitoring and exhaust device 2 042 of the cooling water system of the power plant are respectively installed on the water outlet side of the air compressor cooler 1 031 and the air compressor cooler 2 032 . Air compressor cooler one inlet valve 0311 is installed on the water inlet side of air compressor cooler one 031, air compressor cooler one water outlet valve 0312 is installed on the water outlet side of air compressor cooler one 031, air compressor cooler two inlet The water valve 0321 is installed on the water inlet side of the air compressor cooler 2 032, and the water outlet valve 0322 of the air compressor cooler 2 is installed on the water outlet side of the air compressor cooler 2 032.

When the air compressor cooler 1 031 or the air compressor cooler 2 032 fails and causes the gas to invade the cooling water system, the gas enters the cooling water system from the water outlet side of the faulty air compressor cooler, and enters the local high position of the cooling water system with the water circulation , such as generator hydrogen cooler one 051 and generator hydrogen cooler two 052. After the gas intrusion monitoring and exhaust device 1 041 of the cooling water system of the power plant or the gas intrusion monitoring and exhaust device 2 042 of the power plant cooling water system detects the gas intrusion, the gas intrusion signal is sent to the DCS and exhausted. When the staff closes the water inlet valve and water outlet valve of the faulty air compressor cooler, the fault is completely eliminated, and the gas intrusion of the cooling water system stops.

Claims (8)

1. A gas intrusion monitoring exhaust device for a cooling water system of a power plant, characterized in that it comprises a gas monitoring chamber (2), and the bottom end of the gas monitoring chamber (2) is connected to a gas collection by an upper flange (1-2) A chamber (1), the top of the gas monitoring chamber (2) is sequentially connected with an electric valve (3) and an exhaust pipe (5), and the gas monitoring chamber (2) is also electrically connected with the controller (4). 2 . The gas intrusion monitoring exhaust device for a cooling water system of a power plant according to claim 1 , wherein the gas monitoring chamber ( 2 ) comprises an interconnected frustum-shaped upper casing ( 2 - 1 ) and Inverted bell-shaped lower casing (2-2); A cylindrical inner channel (2-10) is arranged in the center of the upper casing (2-1), and a magnet (2-5) capable of relative movement in a vertical direction is arranged on the inner wall of the inner channel (2-10). The upper casing (2-1) is also radially provided with reed switches a (2-8) and reed switches b (2-9), the reed switches a (2-8), reed switches b (2-9), the electric valve (3) is electrically connected with the controller (4); The bottom end of the inner channel (2-10) is further provided with a ventilation fixing member (2-7); The lower casing (2-2) is provided with a vertical connecting rod (2-4), one end of the connecting rod (2-4) is connected to the floating ball (2-3), and the connecting rod (2-4) 4) Fix the magnet (2-5) at the other end. 3. A power plant cooling water system gas intrusion monitoring exhaust device according to claim 2, characterized in that, the reed switch a (2-8) and the reed switch b (2-9) are respectively located at the upper and lower ends of the upper casing (2-1). 4 . The gas intrusion monitoring and exhaust device for a cooling water system of a power plant according to claim 1 , wherein the upper casing (2-1) and the lower casing (2-2) are also provided at the contact point. 5 . There are sealing rings (2-6). 5 . The gas intrusion monitoring and exhaust device for a cooling water system of a power plant according to claim 1 , wherein the controller ( 4 ) comprises a single-chip microcomputer ( 7 ), and the single-chip microcomputer ( 7 ) is respectively connected to the isolation light. 6 . The coupler a(8) is electrically connected to the isolation optocoupler b(9), the isolation optocoupler a(8) is electrically connected to the reed switch a(2-8), and the isolation optocoupler b(9) is electrically connected to the reed switch a(2-8). Reed switch b(2-9) is electrically connected; The single-chip microcomputer (7) is also electrically connected to the power amplification module (13) and the electric valve (3) in sequence; The single-chip microcomputer (7) is also electrically connected to the EEPROM module (6), the key and display module (12), and the 485 communication module (10) in sequence, and the 485 communication module (10) is electrically connected to the DCS system (11). . 6. The gas intrusion monitoring exhaust device of a power plant cooling water system according to claim 5, wherein the type of the single chip microcomputer (7) is STM32F407; The isolation optocoupler a (8) and the isolation optocoupler b (9) both use an isolation optocoupler chip with a model of TLP521; The power amplifying module (13) specifically includes a relay whose model is JQX-62F-2Z. 7. a kind of power plant cooling water system gas intrusion monitoring exhaust device according to claim 5, is characterized in that, described EEPROM module (6) adopts EEPROM chip, and EEPROM chip model is AT25256; The button and display module (12) includes an LCD control chip, and the model of the LCD control chip is ILI9320; The 485 communication module (10) includes a 485 communication chip whose model is ADM3485E. 8. A gas intrusion monitoring and exhausting method of a cooling water system gas intrusion monitoring exhaust device of a power plant as described in any one of claims 1-7, comprising the following steps: Step 1. Before the cooling water system is put into operation, initialize the gas intrusion monitoring and exhaust device Open the electric valve (3), the gas accumulated in the gas intrusion monitoring exhaust device is discharged from the inner channel (2-10) and the exhaust pipe (5) through the ventilation fixing member (2-7), and the floating ball (2-3) ) under the action of cooling water buoyancy, it floats up and comes into contact with the sealing ring (2-6). At this time, the connecting rod (2-4) drives the magnet (2-5) close to the reed switch a (2-8) and makes the reed switch a (2-8). Reed switch a(2-8) pulls in, the pull-in action information of reed switch a(2-8) enters the microcontroller (7) through the isolation optocoupler a(8), and the action information of reed switch a(2-8) is stored into the EEPROM module (6), and at the same time the action information of the reed switch a (2-8) is transmitted to the DCS system (11) through the 485 communication module (10), at this time, the electric valve (3) is closed; Step 2: After initialization, the cooling water system is put into operation When there is no gas in the cooling water entering the gas collection chamber (1), the inside of the gas intrusion monitoring exhaust device is filled with liquid, at this time the electric valve (3) is closed, and the floating ball (2-3) floats and is in the lower casing (2-2) The inner top end is in close contact with the sealing ring (2-6). At this time, the connecting rod (2-4) drives the magnet (2-5) close to the reed switch a (2-8) and makes the reed Tube a(2-8) is pulled in for a long time, and the pull-in status information of reed switch a(2-8) enters the single-chip microcomputer (7) through the isolation optocoupler a(8), and the status information of reed switch a(2-8) is stored in the EEPROM module (6), and the status information of the reed switches a (2-8) is periodically transmitted to the DCS system (11) through the 485 communication module (10); When the cooling water entering the gas collection chamber (1) carries gas, the gas enters the inner channel (2-10) through the ventilation fixing member (2-7), and as the gas gradually increases, the floating ball (2-3) is pressed downward. Movement, the magnet (2-5) also moves downward under the action of the floating ball (2-3) and the connecting rod (2-4). When the magnet (2-5) is close to the reed switch b (2-9) and When the reed switch b(2-9) is pulled in, the action information of the reed switch b(2-9) enters the microcontroller (7) through the isolation optocoupler b(9), and the action information of the reed switch b(2-9) Stored in the EEPROM module (6), at this time, the action information of the reed switch b (2-9) is transmitted to the DCS system (11) through the 485 communication module (10), and fed back to the operator. The power amplification module (13) controls the electric valve (3) to open, and the gas is discharged while the float (2-3), connecting rod (2-4) and magnet (2-5) gradually rise with the liquid level. After the reed switch a(2-8) is pulled in, the pull-in action information of the reed switch a(2-8) enters the microcontroller (7) through the isolation optocoupler a(8), and the reed switch a(2-8) acts The information is stored in the EEPROM module (6), and the action information of the reed switches a (2-8) is transmitted to the DCS system (11) through the 485 communication module (10), and the single chip (7) is controlled by the power amplifier module (13) The electric valve (3) is closed, and the device returns to a state without gas intrusion.

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