WO2020047873A1 - Two-valve control device for water supplementation valve of wet-type slag discharger in power plant - Google Patents

Two-valve control device for water supplementation valve of wet-type slag discharger in power plant Download PDF

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Publication number
WO2020047873A1
WO2020047873A1 PCT/CN2018/104721 CN2018104721W WO2020047873A1 WO 2020047873 A1 WO2020047873 A1 WO 2020047873A1 CN 2018104721 W CN2018104721 W CN 2018104721W WO 2020047873 A1 WO2020047873 A1 WO 2020047873A1
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Prior art keywords
water level
relay
solenoid valve
switch
water
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PCT/CN2018/104721
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French (fr)
Chinese (zh)
Inventor
李文杰
刘汉俊
邓军
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深圳市能源环保有限公司
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Priority to PCT/CN2018/104721 priority Critical patent/WO2020047873A1/en
Publication of WO2020047873A1 publication Critical patent/WO2020047873A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid

Definitions

  • the invention relates to auxiliary equipment for a wet slag discharger of a power plant, in particular to a two-valve control device for a water supply valve of a wet slag discharger of a power plant.
  • a wet slag discharger is equipped to inject water into the slag discharger to ensure the negative pressure of the furnace, thereby ensuring the safe and stable operation of the boiler equipment and the flue gas.
  • Environmental parameters meet emission standards.
  • the water level control of the slag discharger has become a difficult problem.
  • some power plants install a water supply tank next to the slag discharger, and use a communication pipe to form a balanced container with the slag discharger.
  • the floating ball valve replenishes water to the water tank automatically or manually through the shut-off valve.
  • This method can basically control the water level of the slag discharger within the ideal range, but there are some safety and design deficiencies in the control mode.
  • the slag discharger contains impurities, dross, and dirt, it is easy to cause the communication pipe to be blocked. Inspection personnel must regularly clear the communication pipe between the slag discharger and the water tank every day to ensure that the float ball valve automatically supplies water to the slag discharger. If the inspector has other work and forgets to clear the communication pipe, the slag discharger will lack water when the communication pipe is blocked. When the float ball valve is damaged, the water supply is not normal if it is not found in time; when the water supply of the mechanical float valve is normal, the water in the slag discharger will be squeezed out of the slag discharger during the slag discharge process, and the water level will drop. The float valve fills the slag discharger with water.
  • the slag discharger system is equipped with a recovery water system to recover the overflowing water to the slag discharger.
  • a part of the water was replenished to the slag discharger.
  • the part of the recovered water will be full of the slag discharger, causing the water from the slag discharger to overflow to the slag discharger. Affect the environment between the slag discharge. When the overflow is serious, water will overflow to the outside of the plant, polluting the environment and soil.
  • Some power plants install water level sensors in the make-up water tanks. Automatic water replenishment is achieved by measuring the water level in the water tanks. However, inspection personnel must regularly clear the communication pipes to ensure normal water replenishment and low reliability. Some power plants also install radar water levels above the slag discharger. The meter can automatically replenish water to the slagging machine by measuring the water level in the slagging machine, because the problem of inaccurate water level measurement due to scum and foam problems cannot be solved, so the water level cannot be guaranteed to be within the normal range.
  • the furnace chamber loses negative pressure, which leads to an increase in the opening of the induced draft fan. A large amount of cold air enters the furnace chamber and affects the combustion of the furnace chamber. Excessive cold air entering the furnace chamber can easily cause the heating surface to coke and the flue gas environmental parameters to exceed the standard. It is easy to cause tube screen explosion, which seriously affects equipment and life safety.
  • the present invention proposes a two-valve control device for a water supply valve of a wet slag discharger in a power plant, which includes a control box, a water supply solenoid valve No. 1 and a water supply solenoid valve No. 2, and a water supply solenoid No. 1 is installed in the control box.
  • the main circuit of the valve and No. 2 water solenoid valve and the No. 1 water solenoid valve and No. 2 water solenoid valve control circuit set the water level of the slag discharger from low to high, which are divided into low water level warning line, high water level warning line, high
  • the high water level warning line has three water level warning lines, that is, four areas.
  • Three sets of water level measuring devices are used to monitor different water level warning lines, thereby controlling the No. 1 water supply solenoid valve and No. 2 water supply solenoid valve.
  • No. 1 and 2 solenoid valves are put into operation; when the water level of the slag discharger exceeds the low water level warning line to the high water level warning line, No. 1 solenoid valve operates, 2 No. 1 solenoid valve is disconnected; when the water level of the slag discharger exceeds the high water level warning line, the No. 1 and No. 2 solenoid valves are simultaneously disconnected; when the water level of the slag discharger exceeds the high water level warning line, the No.
  • solenoid valves are simultaneously Disconnect and trigger the high water level sound and light alarm of the slag discharger. It can effectively solve the problems of inadequate or excessive water replenishment caused by the inaccurate water level measurement of the float ball valve and radar water level meter caused by the impurities, scum, foam, mud and other factors in the slag extractor water in the prior art.
  • the technical solution for solving the technical problem of the present invention is:
  • the present invention proposes a two-valve control device for a water supply valve of a wet slag discharger of a power plant, which is characterized by including a control box, a water supply solenoid valve No. 1 and a water supply solenoid valve No. 2.
  • the control box is provided with the main circuit of the No. 1 water supply solenoid valve, the main circuit of the No. 2 water supply solenoid valve, the control circuit of the No. 1 water supply solenoid valve, and the control circuit of the No. 2 water supply solenoid valve;
  • the first group of water level measuring devices includes water level relay YJ1, water level switch YK1-1 and water level switch YK1-2.
  • the second group of water level measuring devices includes water level relay YJ2 and water level switch YK2.
  • the third group of water level The measuring device includes a water level switch YK3;
  • the first group of water level measuring devices is installed at a low water level warning line
  • the second group of water level measuring devices is installed at a high water level warning line
  • the third group of water level measuring devices is installed on a high high water level warning line.
  • the No. 2 water supply solenoid valve When the water level of the slag discharger is below the low water level warning line, the No. 2 water supply solenoid valve is activated, and the audible and visual alarm of the low water level of the slag discharger is triggered at the same time.
  • the delayed closing time relay starts timing. Still on, start No. 1 water supply solenoid valve operation and trigger low water level alarm at the same time;
  • the main circuit of the No. 1 water-supplying solenoid valve includes: the hot wire L passes through the empty switch QF01, the fuse FU01, the starting relay contact KM1no-1, and enters the zero line N after entering the No. 1 water-supplying solenoid valve;
  • the main circuit of the No. 1 water-supply solenoid valve further includes: the hot line L passes through the empty switch QF01, the fuse FU01, the alarm relay contact KM7no-1, and enters the zero line N after entering the No. 1 water-supply solenoid valve;
  • the main circuit of the No. 2 water-supplying solenoid valve includes: the hot wire L passes through the empty switch QF02, the fuse FU02, the start relay contact KM6no-1, and enters the zero line N after entering the No. 2 water-supplying solenoid valve;
  • the control loop of the water supply solenoid valve No. 1 includes:
  • the starter relay KM1 is connected in series to form the No. 1 water-supply solenoid valve automatic starter circuit.
  • the contacts 1 and 3 of the selector switch XK1 are turned on, and the power source 24V enters from the air switch QF03 and finally enters 0V through the starter relay KM1.
  • control circuit fuse FU03 selection switch XK1, water level switch YK1-1, water level switch YK1-2, stop relay contact KM3nc-1, intermediate relay contact KM4nc-1, alarm relay contact KM5nc-1, stop button SA2, and start relay KM1 are connected in series to form the No. 1 water supply solenoid valve automatic start circuit.
  • the contacts 1 and 3 of the selector switch XK1 are turned on, and the power source 24V enters from the air switch QF03 and enters through the start relay KM1. 0V;
  • the manual start control loop of No. 1 water supply solenoid valve is formed by the air switch QF03, the control circuit fuse FU03, the selection switch XK1, the manual start button SA1, the stop button SA2, and the relay KM1 in series. 4 contacts are turned on, and the power source 24V enters 0V from the air switch QF03 and enters the start relay KM1;
  • the manual start self-holding circuit of the No. 1 water supply solenoid valve is formed by the air switch QF03, the control circuit fuse FU03, the selection switch XK1, the start relay contact KM1no-2, the stop button SA2, and the relay KM1 in series.
  • the contacts 2 and 4 of XK1 are turned on, and the power source 24V enters from the air switch QF03 and finally enters 0V through the start relay KM1;
  • the air switch QF03, the control circuit fuse FU03, the selection switch XK2, the start relay contact KM1nc-1, the stop relay contact KM3nc-2, the alarm relay KM2, and the DCS alarm system are connected in series to form a low water level alarm circuit of the slag machine.
  • the contacts 1 and 3 of the selection switch XK2 are turned on, and the power source 24V enters from the air switch QF03 and enters 0V through the start relay KM1; the water level of the slag discharger drops to the water level relay YJ1, the water level switch YK1-1, When the water level switch YK1-2 is below the level, the start relay KM1 loses power, and the start relay contact KM1nc-1 is energized, which triggers a low water alarm of the slag discharger of the DCS system.
  • the 1, 3 contacts of the selection switch XK2 are turned on. When the alarm is activated, the alarm is canceled when the selector switch XK2 is turned to contacts 2 and 4.
  • the air switch QF03, the control circuit fuse FU03, the water level relay YJ2, and the stop relay KM3 are connected in series to form the No. 1 water supply solenoid valve automatic stop control loop.
  • the power source 24V enters from the air switch QF03 and enters 0V through the stop relay KM3.
  • the stop relay KM3 When the water level relay YJ2 detects the water level, the stop relay KM3 is energized, the stop relay KM3 contact KM3nc-1 is opened, the start relay KM1 is de-energized, and the water supply solenoid valve No. 1 stops operating; when the stop relay KM3 is energized, it stops The relay contact KM3nc-2 is disconnected, and the low-level alarm circuit of the DCS system slag discharger is disconnected;
  • the air switch QF03, the control circuit fuse FU03, the water level switch YK2, and the stop relay KM3 are connected in series to form the No. 1 water supply solenoid valve automatic stop control loop.
  • the power source 24V enters from the air switch QF03 and enters the power supply 0V through the stop relay KM3.
  • the stop relay KM3 is energized, the stop relay contact KM3nc-1 is de-energized and disconnected, the start relay KM1 is de-energized, and the water supply solenoid valve No. 1 is stopped.
  • the stop relay contact KM3nc-2 is disconnected, and the low-level alarm circuit of the slag discharger of the DCS system is disconnected;
  • the air switch QF03, the control circuit fuse FU03, the DCS system slag discharge pulse relay contact, the delayed off time relay T0, and the intermediate relay KM4 are connected in series to form the No. 1 water supply solenoid valve delayed start control loop, said DCS
  • the delayed open time relay T0 starts to count
  • the intermediate relay KM4 receives power
  • the intermediate relay contact 4nc-1 loses power
  • the start relay KM1 loses power.
  • intermediate relay contact KM4 and 4nc-1 are powered on, and the No. 1 water supply solenoid valve is restored to the hot standby state. It is determined based on the water level measured by the water level relay and water level switch. Whether it needs to be put into operation;
  • the air switch QF03, the control circuit fuse FU03, the water level switch YK3, the alarm relay KM5, and the DCS alarm system are connected in series to form a high-level alarm control circuit for the slag discharger.
  • the alarm relay KM5 has The DCS system triggers the high water level alarm of the slag discharger electrically; when the slag discharger water level is high, the relay KM5 is energized, the relay contact KM5nc-1 is opened, and the No. 1 water supply solenoid valve automatically starts the control circuit to open;
  • the control circuit of No. 2 water supply solenoid valve includes:
  • the air switch QF03, the control circuit fuse FU03, the selection switch XK3, the start relay contact KM1nc-2, the alarm relay contact KM5nc-2, the stop button SA4, and the start relay KM6 are connected in series to form the No. 2 water supply solenoid valve to automatically start
  • the contacts 1 and 3 of the selection switch XK3 are turned on, the power source 24V is entered from the air switch QF03, and finally the power supply 0V is connected through the start relay KM6; the slag discharger water level drops to the water level relay YJ1, the water level switch YK1 -1.
  • the start relay contact KM1nc-2 is turned on, the start relay KM6 is energized, and the No. 2 water supply solenoid valve is put into operation;
  • the air switch QF03, the control circuit fuse FU03, the selection switch XK3, the manual start button SA3, the stop button SA4, and the start relay KM6 are connected in series to form the No. 2 water supply solenoid valve to manually start the control circuit.
  • the 4 contacts are turned on, and the power source 24V enters the power source 0V from the air switch QF03 through the start relay KM6;
  • the air switch QF03, the control circuit fuse FU03, the selection switch XK3, the start relay contact KM6no-2, the stop button SA4, and the start relay KM6 are connected in series to form the No. 2 water supply solenoid valve to manually start the self-holding circuit.
  • the selection switch The contacts 2 and 4 of XK3 are turned on, and the power source 24V enters from the air switch QF03 and enters the power source 0V through the start relay KM6.
  • the contacts 1 and 3 of the selection switch XK4 are conductive; wherein the contacts 1 and 3 of the selection switch XK4 are activated when the contact is turned on, and the selection switch XK4 is turned to 2 and 4 contacts
  • the alarm is canceled at the point of time; the alarm relay contact KM2no-1 is energized when the water level of the slag discharger is low, and the delay closing time relay T1 starts to time. If the timer contact KM6no-3 is still engaged after the timer is over, State, the low-level sound and light alarm of the DCS system slag discharger is triggered, and the No. 1 water supply solenoid valve is started to run;
  • the air switch QF03, the control circuit fuse FU03, the water level switch YK3, the alarm relay KM5, and the DCS alarm system are connected in series to form a high level water alarm control circuit of the slag discharger.
  • the alarm relay KM5 When the water level switch YK3 detects the water level, the alarm relay KM5 has The DCS system triggers a high water level alarm of the slag discharger.
  • the relay KM5 is energized, the relay contact KM5nc-2 is opened, and the control loop for automatic start of the water supply solenoid valve 2 is opened.
  • the control water level of the water level relay YJ1, the water level switch YK1-1, the water level switch YK1-2 is lower than the water level relay YJ2, the water level switch YK2; the control water level of the water level relay YJ2, the water level switch YK2 is lower than the control water level of the water level switch YK3.
  • the present invention provides a two-valve control device for a water supply valve of a wet slag discharger of a power plant, which includes a control box, a water supply solenoid valve No. 1 and a water supply solenoid valve No. 2.
  • the water supply No. 1 is installed in the control box.
  • Control which can activate the number of solenoid valves according to the water level control of the slag discharger, effectively solve the water level measurement in the prior art due to the impurities, dross, mud and other factors in the water level caused by the impurities in the water. Too many questions. Avoiding the negative pressure of the slagging machine due to the problem of water supply, and the excessive cold air entering the furnace can easily cause coking of the heating surface and excessive environmental protection parameters of the flue gas. After the coking of the heating surface is serious, it will easily cause a series of serious tube explosion. Issues affecting equipment and life safety.
  • FIGS. 1-3 are schematic diagrams of the circuit layout of the first embodiment of the present invention, wherein FIG. 1 is a schematic diagram of the main circuit layout, FIG. 2 is a schematic diagram of the control circuit layout, and FIG. 3 is a schematic diagram of the enlarged result of the selection switch contact.
  • FIGS. 1-3 are schematic diagrams of the circuit layout of the first embodiment of the present invention. Among them, FIG. 1 is a schematic diagram of the main circuit layout, FIG. 2 is a schematic diagram of the control circuit layout, and FIG.
  • a two-valve control device for a water supply valve of a wet slag discharger of a power plant is characterized in that it includes a control box, a water supply solenoid valve No. 1 and a water supply solenoid valve No. 2.
  • the control box is provided with Main circuit of No. 1 water supply solenoid valve and No. 2 water supply solenoid valve and No. 1 water supply solenoid valve and No. 2 water supply solenoid valve control circuit;
  • the first group of water level measuring devices includes water level relay YJ1, water level switch YK1-1 and water level switch YK1-2.
  • the second group of water level measuring devices includes water level relay YJ2 and water level switch YK2.
  • the third group of water level The measuring device includes a water level switch YK3;
  • the first group of water level measuring devices is installed at a low water level warning line
  • the second group of water level measuring devices is installed at a high water level warning line
  • the third group of water level measuring devices is installed on a high high water level warning line.
  • the No. 2 water supply solenoid valve When the water level of the slag discharger is below the low water level warning line, the No. 2 water supply solenoid valve is activated, and the audible and visual alarm of the low water level of the slag discharger is triggered at the same time.
  • the delayed closing time relay starts timing. Still, start the No. 1 water supply solenoid valve and trigger the low water alarm.
  • the main circuit of the No. 1 water-supplying solenoid valve includes: the live wire L passes through the empty switch QF01, the fuse FU01, the starting relay contact KM1no-1, and enters the zero line N after entering the No. 1 water-supplying solenoid valve.
  • the main circuit of the No. 1 water-supplying solenoid valve further includes: the hot wire L passes through the empty switch QF01, the fuse FU01, the alarm relay contact KM7no-1, and enters the neutral line N after entering the No. 1 water-supplying solenoid valve.
  • the main circuit of the No. 2 water-supplying solenoid valve includes: the hot wire L passes through the empty switch QF02, the fuse FU02, the starting relay contact KM6no-1, and enters the neutral line N after entering the No. 2 water-supplying solenoid valve.
  • the control loop of the water supply solenoid valve No. 1 includes:
  • the starting relay KM1 is connected in series to form the No. 1 water supply solenoid valve automatic starting circuit.
  • the contacts 1, 3 of the selection switch XK1 are turned on, and the power source 24V enters from the air switch QF03 and finally enters 0V through the starting relay KM1.
  • control circuit fuse FU03 selection switch XK1, water level switch YK1-1, water level switch YK1-2, stop relay contact KM3nc-1, intermediate relay contact KM4nc-1, alarm relay contact KM5nc-1, stop button SA2, and start relay KM1 are connected in series to form the No. 1 water supply solenoid valve automatic start circuit.
  • the contacts 1 and 3 of the selector switch XK1 are turned on, and the power source 24V enters from the air switch QF03 and enters through the start relay KM1. 0V.
  • the manual start control loop of No. 1 water supply solenoid valve is formed by the air switch QF03, the control circuit fuse FU03, the selection switch XK1, the manual start button SA1, the stop button SA2, and the relay KM1 in series.
  • the 4 contacts are turned on, and the power source 24V enters 0V from the air switch QF03 through the start relay KM1.
  • the manual start self-holding circuit of the No. 1 water supply solenoid valve is formed by the air switch QF03, the control circuit fuse FU03, the selection switch XK1, the start relay contact KM1no-2, the stop button SA2, and the relay KM1 in series.
  • the contacts 2 and 4 of XK1 are turned on, and the power source 24V enters from the air switch QF03 and finally enters 0V through the start relay KM1.
  • the air switch QF03, the control circuit fuse FU03, the selection switch XK2, the start relay contact KM1nc-1, the stop relay contact KM3nc-2, the alarm relay KM2, and the DCS alarm system are connected in series to form a low water level alarm circuit of the slag machine.
  • the contacts 1 and 3 of the selection switch XK2 are turned on, and the power source 24V enters from the air switch QF03 and enters 0V through the start relay KM1; the water level of the slag discharger drops to the water level relay YJ1, the water level switch YK1-1, When the water level switch YK1-2 is below the level, the start relay KM1 loses power, and the start relay contact KM1nc-1 is energized, which triggers a low water alarm of the slag discharger of the DCS system.
  • the 1, 3 contacts of the selection switch XK2 are turned on. When the alarm is activated, the alarm is canceled when the selector switch XK2 is turned to contacts 2 and 4.
  • the air switch QF03, the control circuit fuse FU03, the water level relay YJ2, and the stop relay KM3 are connected in series to form the No. 1 water supply solenoid valve automatic stop control loop.
  • the power source 24V enters from the air switch QF03 and enters 0V through the stop relay KM3.
  • the stop relay KM3 When the water level relay YJ2 detects the water level, the stop relay KM3 is energized, the stop relay KM3 contact KM3nc-1 is opened, the start relay KM1 is de-energized, and the water supply solenoid valve No. 1 stops operating; when the stop relay KM3 is energized, it stops The relay contact KM3nc-2 is disconnected, and the low-level alarm circuit of the slag discharger of the DCS system is disconnected.
  • the air switch QF03, the control circuit fuse FU03, the water level switch YK2, and the stop relay KM3 are connected in series to form the No. 1 water supply solenoid valve automatic stop control loop.
  • the power source 24V enters from the air switch QF03 and enters the power supply 0V through the stop relay KM3.
  • the stop relay KM3 is energized, the stop relay contact KM3nc-1 is de-energized and disconnected, the start relay KM1 is de-energized, and the water supply solenoid valve No. 1 is stopped.
  • the stop relay contact KM3nc-2 is opened, and the low-level alarm circuit of the DCS system slag discharger is disconnected.
  • the air switch QF03, the control circuit fuse FU03, the DCS system slag discharge pulse relay contact, the delayed off time relay T0, and the intermediate relay KM4 are connected in series to form the No. 1 water supply solenoid valve delayed start control loop, said DCS
  • the delayed open time relay T0 starts to count
  • the intermediate relay KM4 receives power
  • the intermediate relay contact 4nc-1 loses power
  • the start relay KM1 loses power.
  • intermediate relay contact KM4 and 4nc-1 are powered on, and the No. 1 water supply solenoid valve is restored to the hot standby state. It is determined based on the water level measured by the water level relay and water level switch. Whether it needs to be put into operation,
  • the air switch QF03, the control circuit fuse FU03, the water level switch YK3, the alarm relay KM5, and the DCS alarm system are connected in series to form a high-level alarm control circuit for the slag discharger.
  • the alarm relay KM5 has The DCS system triggers a high water level alarm of the slag discharger; when the water level of the slag discharger is high, the relay KM5 is energized, the relay contact KM5nc-1 is opened, and the No. 1 water supply solenoid valve automatically starts the control circuit.
  • the control circuit of No. 2 water supply solenoid valve includes:
  • the air switch QF03, the control circuit fuse FU03, the selection switch XK3, the start relay contact KM1nc-2, the alarm relay contact KM5nc-2, the stop button SA4, and the start relay KM6 are connected in series to form the No. 2 water supply solenoid valve to automatically start
  • the contacts 1 and 3 of the selection switch XK3 are turned on, the power source 24V is entered from the air switch QF03, and finally the power supply 0V is connected through the start relay KM6; the slag discharger water level drops to the water level relay YJ1, the water level switch YK1 -1.
  • the starting relay contact KM1nc-2 is electrically connected
  • the starting relay KM6 is electrically connected
  • the No. 2 water supply solenoid valve is put into operation;
  • the air switch QF03, the control circuit fuse FU03, the selection switch XK3, the manual start button SA3, the stop button SA4, and the start relay KM6 are connected in series to form the No. 2 water supply solenoid valve manual start control circuit.
  • the 4 contacts are turned on, and the power supply 24V enters the power supply 0V from the air switch QF03 through the start relay KM6.
  • the air switch QF03, the control circuit fuse FU03, the selection switch XK3, the start relay contact KM6no-2, the stop button SA4, and the start relay KM6 are connected in series to form the No. 2 water supply solenoid valve to manually start the self-holding circuit.
  • the selection switch The contacts 2 and 4 of XK3 are turned on, and the power source 24V enters from the air switch QF03 and finally enters the power source 0V through the start relay KM6.
  • the fourth consists of air switch QF03, control circuit fuse FU03, alarm relay contact KM2no-1, delayed closing time relay T1, select switch XK4, start relay contact KM6no-3, alarm relay KM7, and DCS alarm system in series
  • the alarm is canceled at the point of time; the alarm relay contact KM2no-1 is energized when the water level of the slag discharger is low, and the delay closing time relay T1 starts to time.
  • the air switch QF03, the control circuit fuse FU03, the water level switch YK3, the alarm relay KM5, and the DCS alarm system are connected in series to form a high level water alarm control circuit of the slag discharger.
  • the alarm relay KM5 has The DCS system triggers a high water level alarm of the slag discharger; when the water level of the slag discharger is high, the relay KM5 is energized, the relay contact KM5nc-2 is opened, and the No. 2 water supply solenoid valve automatically starts the control circuit.
  • the control water level of the water level relay YJ1, the water level switch YK1-1, the water level switch YK1-2 is lower than the water level relay YJ2, the water level switch YK2; the control water level of the water level relay YJ2, the water level switch YK2 is lower than the control water level of the water level switch YK3.

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Abstract

A two-valve control device for a water supplementing valve of a wet-type slag discharger in a power plant comprises a control box, a first water supplementing solenoid valve, and a second water supplementing solenoid valve. A first water supplementing solenoid valve main circuit, a second water supplementing solenoid valve main circuit, a first water supplementing solenoid valve control circuit, and a second water supplementing solenoid valve control circuit are mounted on the control box. The control circuits are used to control the two solenoid valves, and each of the solenoid valves is controlled by multiple water level signals. In the invention, the number of solenoid valves that need to be activated is controlled according to a water level of the slag discharger, thereby effectively resolving the issue of non-timely or excessive water supplementation resulting from impurities, scum, and mud in the water reducing accuracy of water level measurement performed by a float valve and a radar water level gauge, and eliminating situtations impacting the safety of devices and personnel, such as when a failure of water supplementation causes the slag discharger to be short of water, resulting in a lack of negative pressure in a furnace and excessive cold air entering the furnace, causing a heating surface to be coked and a flue gas environmental protection index to exceed standards, and ultimately causing a tube panel to burst.

Description

一种发电厂湿式出渣机补水阀两阀控制装置Two-valve control device for water supply valve of wet slag discharger of power plant 技术领域Technical field
本发明涉及一种发电厂湿式出渣机辅助设备，尤其涉及一种发电厂湿式出渣机补水阀两阀控制装置。The invention relates to auxiliary equipment for a wet slag discharger of a power plant, in particular to a two-valve control device for a water supply valve of a wet slag discharger of a power plant.
背景技术Background technique
发电厂燃料燃尽后的渣都需要排出锅炉外，因此配套了湿式出渣机，向出渣机内注水来保证炉膛的负压，从而保证锅炉设备安全、稳定的运行，也保证了烟气环保参数达标排放。After the fuel of the power plant is burned out, the slag needs to be discharged out of the boiler. Therefore, a wet slag discharger is equipped to inject water into the slag discharger to ensure the negative pressure of the furnace, thereby ensuring the safe and stable operation of the boiler equipment and the flue gas. Environmental parameters meet emission standards.
由于出渣机内的水比较浑浊，含杂质、浮渣、泡沫、泥较多，因此出渣机水位控制成为一个难题。现有技术中部分发电厂在出渣机旁边安装一个补水箱，利用连通管与出渣机形成一个平衡容器，在连通管加装滤网以免杂质、浮渣进入到补水箱中，再利用机械式浮球阀向水箱自动补水或通过截止阀手动补水。这种方式基本能够控制出渣机水位在理想范围内，但是控制模式存在一些安全和设计方面的欠缺。Because the water in the slag discharger is relatively turbid and contains more impurities, scum, foam, and mud, the water level control of the slag discharger has become a difficult problem. In the prior art, some power plants install a water supply tank next to the slag discharger, and use a communication pipe to form a balanced container with the slag discharger. Install a filter on the communication pipe to prevent impurities and scum from entering the water supply tank, and then use machinery. The floating ball valve replenishes water to the water tank automatically or manually through the shut-off valve. This method can basically control the water level of the slag discharger within the ideal range, but there are some safety and design deficiencies in the control mode.
由于出渣机内含杂质、浮渣、泥土较多容易导致连通管堵塞，巡检人员每天须定时疏通出渣机与水箱之间的连通管，才能保证浮球阀自动向出渣机补水正常。若巡检人员有其他的工作忘记疏通连通管时，连通管堵塞时就会导致出渣机缺水。当浮球阀损坏时，没有及时发现也会引起补水不正常；当机械浮球阀补水正常时，在出渣过程中出渣机内的水会被挤出出渣机，水位下降，此时通过机械浮球阀往出渣机补水。出渣机***配置回收水***，将溢流的水回收至出渣机。在出渣过程中往出渣机补充了一部分水，一个出渣周期结束后加上回收的那部分水会出现出渣机满水的情况，导致出渣机的水溢流至出渣间，影响出渣间的环境，溢流严重时水会溢流至厂外，污染环境及土壤。Because the slag discharger contains impurities, dross, and dirt, it is easy to cause the communication pipe to be blocked. Inspection personnel must regularly clear the communication pipe between the slag discharger and the water tank every day to ensure that the float ball valve automatically supplies water to the slag discharger. If the inspector has other work and forgets to clear the communication pipe, the slag discharger will lack water when the communication pipe is blocked. When the float ball valve is damaged, the water supply is not normal if it is not found in time; when the water supply of the mechanical float valve is normal, the water in the slag discharger will be squeezed out of the slag discharger during the slag discharge process, and the water level will drop. The float valve fills the slag discharger with water. The slag discharger system is equipped with a recovery water system to recover the overflowing water to the slag discharger. During the slag discharge process, a part of the water was replenished to the slag discharger. After the end of a slag discharge cycle, the part of the recovered water will be full of the slag discharger, causing the water from the slag discharger to overflow to the slag discharger. Affect the environment between the slag discharge. When the overflow is serious, water will overflow to the outside of the plant, polluting the environment and soil.
部分电厂在补水箱安装水位传感器，通过测量水箱的水位来实现自动补水，但还是需要巡检人员定时疏通连通管才能保证补水正常，其可靠性低；也有部分电厂在出渣机上方安装雷达水位计通过测量出渣机内的水位来实现自动向出渣机补水，因为解决不了因浮渣、泡沫问题导致水位测量不准的问题，因此不能保证水位在正常范围内。出渣机缺水时炉膛失去负压，导致引风机开度增大，大量冷风进入炉膛影响炉膛燃烧，过量的冷风进入炉膛还容易引起受热面结焦及烟气环保参数超标，受热面结焦严重后容易引起管屏爆管，严重影响了设备及人生安全。Some power plants install water level sensors in the make-up water tanks. Automatic water replenishment is achieved by measuring the water level in the water tanks. However, inspection personnel must regularly clear the communication pipes to ensure normal water replenishment and low reliability. Some power plants also install radar water levels above the slag discharger. The meter can automatically replenish water to the slagging machine by measuring the water level in the slagging machine, because the problem of inaccurate water level measurement due to scum and foam problems cannot be solved, so the water level cannot be guaranteed to be within the normal range. When the slag ejector lacks water, the furnace chamber loses negative pressure, which leads to an increase in the opening of the induced draft fan. A large amount of cold air enters the furnace chamber and affects the combustion of the furnace chamber. Excessive cold air entering the furnace chamber can easily cause the heating surface to coke and the flue gas environmental parameters to exceed the standard. It is easy to cause tube screen explosion, which seriously affects equipment and life safety.
发明内容Summary of the Invention
为了解决上述问题，本发明提出一种发电厂湿式出渣机补水阀两阀控制装置，包括控制箱、1号补水电磁阀、2号补水电磁阀，在所述控制箱安装有1号补水电磁阀和2号补水电磁阀主电路及1号补水电磁阀和2号补水电磁阀控制回路，将出渣机的水位从低到高设置，依次分为低水位警戒线、高水位警戒线、高高水位警戒线共三条水位警戒线即四个区域，通过设置3组水位测量装置对不同水位警戒线进行监测，从而对1号补水电磁阀及2号补水电磁阀进行控制。当出渣机水位在低水位警戒线以下并发生低水位报警时，1号及2号电磁阀投入运行；当出渣机水位超过低水位警戒线至高水位警戒线时1号电磁阀运行，2号电磁阀断开；当出渣机水位超过高水位警戒线时，1号及2号电磁阀同时断开；当出渣机水位超过高高水位警戒线时，1号及2号电磁阀同时断开并触发出渣机高水位声光报警。可以有效解决现有技术中出渣机水中含杂质、浮渣、泡沫、泥等因素引起浮球阀、雷达水位计水位测量不准导致补水不及时或过多的问题。In order to solve the above problems, the present invention proposes a two-valve control device for a water supply valve of a wet slag discharger in a power plant, which includes a control box, a water supply solenoid valve No. 1 and a water supply solenoid valve No. 2, and a water supply solenoid No. 1 is installed in the control box. The main circuit of the valve and No. 2 water solenoid valve and the No. 1 water solenoid valve and No. 2 water solenoid valve control circuit set the water level of the slag discharger from low to high, which are divided into low water level warning line, high water level warning line, high The high water level warning line has three water level warning lines, that is, four areas. Three sets of water level measuring devices are used to monitor different water level warning lines, thereby controlling the No. 1 water supply solenoid valve and No. 2 water supply solenoid valve. When the water level of the slag discharger is below the low water level warning line and a low water level alarm occurs, No. 1 and 2 solenoid valves are put into operation; when the water level of the slag discharger exceeds the low water level warning line to the high water level warning line, No. 1 solenoid valve operates, 2 No. 1 solenoid valve is disconnected; when the water level of the slag discharger exceeds the high water level warning line, the No. 1 and No. 2 solenoid valves are simultaneously disconnected; when the water level of the slag discharger exceeds the high water level warning line, the No. 1 and No. 2 solenoid valves are simultaneously Disconnect and trigger the high water level sound and light alarm of the slag discharger. It can effectively solve the problems of inadequate or excessive water replenishment caused by the inaccurate water level measurement of the float ball valve and radar water level meter caused by the impurities, scum, foam, mud and other factors in the slag extractor water in the prior art.
本发明解决技术问题所在的技术方案是：本发明提出一种发电厂湿式出渣机补水阀两阀控制装置，其特征是，包括控 制箱、1号补水电磁阀、2号补水电磁阀，在所述控制箱安装有1号补水电磁阀主电路、2号补水电磁阀主电路、1号补水电磁阀控制回路及2号补水电磁阀控制回路；The technical solution for solving the technical problem of the present invention is: The present invention proposes a two-valve control device for a water supply valve of a wet slag discharger of a power plant, which is characterized by including a control box, a water supply solenoid valve No. 1 and a water supply solenoid valve No. 2. The control box is provided with the main circuit of the No. 1 water supply solenoid valve, the main circuit of the No. 2 water supply solenoid valve, the control circuit of the No. 1 water supply solenoid valve, and the control circuit of the No. 2 water supply solenoid valve;
还包括3组水位测量装置，第一组水位测量装置包括水位继电器YJ1、水位开关YK1-1、水位开关YK1-2；第二组水位测量装置包括水位继电器YJ2、水位开关YK2；第三组水位测量装置包括水位开关YK3；It also includes three groups of water level measuring devices. The first group of water level measuring devices includes water level relay YJ1, water level switch YK1-1 and water level switch YK1-2. The second group of water level measuring devices includes water level relay YJ2 and water level switch YK2. The third group of water level The measuring device includes a water level switch YK3;
将出渣机的水位从低到高设置，依次分为低水位警戒线、高水位警戒线、高高水位警戒线共三条水位警戒线即四个区域；Set the water level of the slag discharger from low to high, and divide them into three water level warning lines, that is, four areas: low water level warning line, high water level warning line, and high water level warning line.
所述第一组水位测量装置安装在低水位警戒线；The first group of water level measuring devices is installed at a low water level warning line;
所述第二组水位测量装置安装在高水位警戒线；The second group of water level measuring devices is installed at a high water level warning line;
所述第三组水位测量装置安装在高高水位警戒线。The third group of water level measuring devices is installed on a high high water level warning line.
当出渣机水位处于低水位警戒线以下时，启动2号补水电磁阀，同时触发出渣机低水位声光报警，延时闭合时间继电器开始计时，延时闭合时间继电器闭合时若低水位报警仍在，启动1号补水电磁阀运行，同时触发水位低低报警；When the water level of the slag discharger is below the low water level warning line, the No. 2 water supply solenoid valve is activated, and the audible and visual alarm of the low water level of the slag discharger is triggered at the same time. The delayed closing time relay starts timing. Still on, start No. 1 water supply solenoid valve operation and trigger low water level alarm at the same time;
当出渣机水位超过低水位警戒线至高水位警戒线时(不含高水位警戒线)，1号补水电磁阀运行，2号补水电磁阀停止运行；When the water level of the slag discharger exceeds the low water level warning line to the high water level warning line (excluding the high water level warning line), the No. 1 water supply solenoid valve is operated, and the No. 2 water supply solenoid valve is stopped;
当出渣机水位超过高水位警戒线时(含高水位警戒线)，停止1号补水电磁阀运行；When the water level of the slag ejector exceeds the high water level warning line (including the high water level warning line), stop the No. 1 water supply solenoid valve operation;
当出渣机水位超过高高水位警戒线时，触发出渣机高水位声光报警，1号补水电磁阀及2号补水电磁阀启动控制回路断开；When the slag discharger water level exceeds the high and high water level warning line, the slag discharger high water level audible and visual alarm is triggered, and the No. 1 water supply solenoid valve and the No. 2 water supply solenoid valve start control circuit are disconnected;
所述1号补水电磁阀主电路包括：火线L依次经过空器开关QF01,熔断器FU01、启动继电器触点KM1no-1、进入1号补水电磁阀后进入零线N；The main circuit of the No. 1 water-supplying solenoid valve includes: the hot wire L passes through the empty switch QF01, the fuse FU01, the starting relay contact KM1no-1, and enters the zero line N after entering the No. 1 water-supplying solenoid valve;
所述1号补水电磁阀主电路还包括：火线L依次经过空器开关QF01,熔断器FU01、报警继电器触点KM7no-1、进入1号补水电磁阀后进入零线N；The main circuit of the No. 1 water-supply solenoid valve further includes: the hot line L passes through the empty switch QF01, the fuse FU01, the alarm relay contact KM7no-1, and enters the zero line N after entering the No. 1 water-supply solenoid valve;
所述2号补水电磁阀主电路包括：火线L依次经过空器开关QF02,熔断器FU02、启动继电器触点KM6no-1、进入2号补水电磁阀后进入零线N；The main circuit of the No. 2 water-supplying solenoid valve includes: the hot wire L passes through the empty switch QF02, the fuse FU02, the start relay contact KM6no-1, and enters the zero line N after entering the No. 2 water-supplying solenoid valve;
所述1号补水电磁阀控制回路包括：The control loop of the water supply solenoid valve No. 1 includes:
第一、由空气开关QF03、控制回路熔断器FU03、选择开关XK1、水位继电器YJ1、停止继电器触点KM3nc-1、中间继电器触点KM4nc-1、报警继电器触点KM5nc-1、停止按钮SA2、启动继电器KM1串联构成1号补水电磁阀自动启动回路，所述选择开关XK1的1、3触点导通，电源24V从空气开关QF03进入最后经过启动继电器KM1接入0V；First, by air switch QF03, control circuit fuse FU03, selection switch XK1, water level relay YJ1, stop relay contact KM3nc-1, intermediate relay contact KM4nc-1, alarm relay contact KM5nc-1, stop button SA2, The starter relay KM1 is connected in series to form the No. 1 water-supply solenoid valve automatic starter circuit. The contacts 1 and 3 of the selector switch XK1 are turned on, and the power source 24V enters from the air switch QF03 and finally enters 0V through the starter relay KM1.
第二、由空气开关QF03、控制回路熔断器FU03、选择开关XK1、水位开关YK1-1、水位开关YK1-2、停止继电器触点KM3nc-1、中间继电器触点KM4nc-1、报警继电器触点KM5nc-1、停止按钮SA2、启动继电器KM1串联构成1号补水电磁阀自动启动回路，所述选择开关XK1的1、3触点导通，电源24V从空气开关QF03进入最后经过启动继电器KM1接入0V；Second, by air switch QF03, control circuit fuse FU03, selection switch XK1, water level switch YK1-1, water level switch YK1-2, stop relay contact KM3nc-1, intermediate relay contact KM4nc-1, alarm relay contact KM5nc-1, stop button SA2, and start relay KM1 are connected in series to form the No. 1 water supply solenoid valve automatic start circuit. The contacts 1 and 3 of the selector switch XK1 are turned on, and the power source 24V enters from the air switch QF03 and enters through the start relay KM1. 0V;
第三、由空气开关QF03、控制回路熔断器FU03、选择开关XK1、手动启动按钮SA1、停止按钮SA2、继电器KM1串联构成1号补水电磁阀的手动启动控制回路，所述选择开关XK1的2、4触点导通，电源24V从空气开关QF03进入最后经过启 动继电器KM1接入0V；Third, the manual start control loop of No. 1 water supply solenoid valve is formed by the air switch QF03, the control circuit fuse FU03, the selection switch XK1, the manual start button SA1, the stop button SA2, and the relay KM1 in series. 4 contacts are turned on, and the power source 24V enters 0V from the air switch QF03 and enters the start relay KM1;
第四、由空气开关QF03、控制回路熔断器FU03、选择开关XK1、启动继电器触点KM1no-2、停止按钮SA2、继电器KM1串联构成1号补水电磁阀的手动启动自保持回路，所述选择开关XK1的2、4触点导通，电源24V从空气开关QF03进入最后经过启动继电器KM1接入0V；Fourth, the manual start self-holding circuit of the No. 1 water supply solenoid valve is formed by the air switch QF03, the control circuit fuse FU03, the selection switch XK1, the start relay contact KM1no-2, the stop button SA2, and the relay KM1 in series. The contacts 2 and 4 of XK1 are turned on, and the power source 24V enters from the air switch QF03 and finally enters 0V through the start relay KM1;
第五、由空气开关QF03、控制回路熔断器FU03、选择开关XK2、启动继电器触点KM1nc-1、停止继电器触点KM3nc-2、报警继电器KM2、DCS报警***串联构成出渣机水位低报警回路，所述的选择开关XK2的1、3触点导通，电源24V从空气开关QF03进入最后经过启动继电器KM1接入0V；所述出渣机水位下降至水位继电器YJ1、水位开关YK1-1、水位开关YK1-2所在平面以下时，启动继电器KM1失电，启动继电器触点KM1nc-1得电吸合，触发DCS***出渣机水位低报警，其中选择开关XK2的1、3触点导通时启动报警、选择开关XK2转至2、4触点时取消报警；Fifth, the air switch QF03, the control circuit fuse FU03, the selection switch XK2, the start relay contact KM1nc-1, the stop relay contact KM3nc-2, the alarm relay KM2, and the DCS alarm system are connected in series to form a low water level alarm circuit of the slag machine. The contacts 1 and 3 of the selection switch XK2 are turned on, and the power source 24V enters from the air switch QF03 and enters 0V through the start relay KM1; the water level of the slag discharger drops to the water level relay YJ1, the water level switch YK1-1, When the water level switch YK1-2 is below the level, the start relay KM1 loses power, and the start relay contact KM1nc-1 is energized, which triggers a low water alarm of the slag discharger of the DCS system. Among them, the 1, 3 contacts of the selection switch XK2 are turned on. When the alarm is activated, the alarm is canceled when the selector switch XK2 is turned to contacts 2 and 4.
第六、由空气开关QF03、控制回路熔断器FU03、水位继电器YJ2、停止继电器KM3串联构成1号补水电磁阀自动停止控制回路，电源24V从空气开关QF03进入最后经过停止继电器KM3接入0V，所述水位继电器YJ2检测到水位时，停止继电器KM3得电，停止继电器KM3触点KM3nc-1断开，启动继电器KM1失电，1号补水电磁阀停止运行；所述停止继电器KM3得电时，停止继电器触点KM3nc-2断开，DCS***出渣机水位低报警回路断开；Sixth, the air switch QF03, the control circuit fuse FU03, the water level relay YJ2, and the stop relay KM3 are connected in series to form the No. 1 water supply solenoid valve automatic stop control loop. The power source 24V enters from the air switch QF03 and enters 0V through the stop relay KM3. When the water level relay YJ2 detects the water level, the stop relay KM3 is energized, the stop relay KM3 contact KM3nc-1 is opened, the start relay KM1 is de-energized, and the water supply solenoid valve No. 1 stops operating; when the stop relay KM3 is energized, it stops The relay contact KM3nc-2 is disconnected, and the low-level alarm circuit of the DCS system slag discharger is disconnected;
第七、由空气开关QF03、控制回路熔断器FU03、水位开关YK2、停止继电器KM3串联构成1号补水电磁阀自动停止控制回路，电源24V从空气开关QF03进入最后经过停止继电器KM3接入电源0V，所述水位开关YK2检测到水位时，停止继电器KM3得电，停止继电器触点KM3nc-1失电断开，启动继电器KM1失电，1号补水电磁阀停止运行；所述停止继电器KM3得电时，停止继电器触点KM3nc-2断开，DCS***出渣机水位低报警回路断开；Seventh, the air switch QF03, the control circuit fuse FU03, the water level switch YK2, and the stop relay KM3 are connected in series to form the No. 1 water supply solenoid valve automatic stop control loop. The power source 24V enters from the air switch QF03 and enters the power supply 0V through the stop relay KM3. When the water level switch YK2 detects the water level, the stop relay KM3 is energized, the stop relay contact KM3nc-1 is de-energized and disconnected, the start relay KM1 is de-energized, and the water supply solenoid valve No. 1 is stopped. When the stop relay KM 3 is energized, , The stop relay contact KM3nc-2 is disconnected, and the low-level alarm circuit of the slag discharger of the DCS system is disconnected;
第八、由空气开关QF03、控制回路熔断器FU03、DCS***卸渣脉冲继电器触点、延时断开时间继电器T0、中间继电器KM4串联构成1号补水电磁阀延时启动控制回路，所述DCS***卸渣脉冲信号触点闭合时，延时断开时间继电器T0得电开始计时，中间继电器KM4得电，中间继电器触点4nc-1失电断开，启动继电器KM1失电，1号补水电磁阀停止运行；时间继电器T0计时结束时失电，继电器KM4失电，中间继电器触点KM4 4nc-1得电闭合，1号补水电磁阀恢复热备用状态，根据水位继电器、水位开关测量的水位判定是否需要投入运行；Eighth, the air switch QF03, the control circuit fuse FU03, the DCS system slag discharge pulse relay contact, the delayed off time relay T0, and the intermediate relay KM4 are connected in series to form the No. 1 water supply solenoid valve delayed start control loop, said DCS When the system's slag discharge pulse signal contact is closed, the delayed open time relay T0 starts to count, the intermediate relay KM4 receives power, the intermediate relay contact 4nc-1 loses power, and the start relay KM1 loses power. The valve stops running; time relay T0 loses power at the end of timing, relay KM4 loses power, intermediate relay contact KM4 and 4nc-1 are powered on, and the No. 1 water supply solenoid valve is restored to the hot standby state. It is determined based on the water level measured by the water level relay and water level switch. Whether it needs to be put into operation;
第九、由空气开关QF03、控制回路熔断器FU03、水位开关YK3、报警继电器KM5、DCS报警***串联构成出渣机水位高报警控制回路，所述水位开关YK3检测到水位时，报警继电器KM5得电触发DCS***出渣机水位高报警；所述出渣机水位高报警时继电器KM5得电，继电器触点KM5nc-1断开，1号补水电磁阀自动启动控制回路断开；Ninth, the air switch QF03, the control circuit fuse FU03, the water level switch YK3, the alarm relay KM5, and the DCS alarm system are connected in series to form a high-level alarm control circuit for the slag discharger. When the water level switch YK3 detects the water level, the alarm relay KM5 has The DCS system triggers the high water level alarm of the slag discharger electrically; when the slag discharger water level is high, the relay KM5 is energized, the relay contact KM5nc-1 is opened, and the No. 1 water supply solenoid valve automatically starts the control circuit to open;
2号补水电磁阀控制回路包括：The control circuit of No. 2 water supply solenoid valve includes:
第一、由空气开关QF03、控制回路熔断器FU03、选择开关XK3、启动继电器触点KM1nc-2、报警继电器触点KM5nc-2、停止按钮SA4、启动继电器KM6串联构成2号补水电磁阀自动启动控制回路，所述选择开关XK3的1、3触点导通，电源24V从空气开关QF03进入，最后经过启动继电器KM6接入电源0V；所述出渣机水位下降至水位继电器YJ1、水位开关YK1-1、水位开关YK1-2的控制水位以下时，启动继电器触点KM1nc-2导通，启动继电器KM6得电，2号补水电磁阀投入运行；First, the air switch QF03, the control circuit fuse FU03, the selection switch XK3, the start relay contact KM1nc-2, the alarm relay contact KM5nc-2, the stop button SA4, and the start relay KM6 are connected in series to form the No. 2 water supply solenoid valve to automatically start In the control circuit, the contacts 1 and 3 of the selection switch XK3 are turned on, the power source 24V is entered from the air switch QF03, and finally the power supply 0V is connected through the start relay KM6; the slag discharger water level drops to the water level relay YJ1, the water level switch YK1 -1. When the water level switch YK1-2 is below the control water level, the start relay contact KM1nc-2 is turned on, the start relay KM6 is energized, and the No. 2 water supply solenoid valve is put into operation;
第二、由空气开关QF03、控制回路熔断器FU03、选择开关XK3、手动启动按钮SA3、停止按钮SA4、启动继电器KM6 串联构成2号补水电磁阀手动启动控制回路，所述选择开关XK3的2、4触点导通，电源24V从空气开关QF03进入最后经过启动继电器KM6接入电源0V；Second, the air switch QF03, the control circuit fuse FU03, the selection switch XK3, the manual start button SA3, the stop button SA4, and the start relay KM6 are connected in series to form the No. 2 water supply solenoid valve to manually start the control circuit. The 4 contacts are turned on, and the power source 24V enters the power source 0V from the air switch QF03 through the start relay KM6;
第三、由空气开关QF03、控制回路熔断器FU03、选择开关XK3、启动继电器触点KM6no-2、停止按钮SA4、启动继电器KM6串联构成2号补水电磁阀手动启动自保持回路，所述选择开关XK3的2、4触点导通，电源24V从空气开关QF03进入最后经过启动继电器KM6接入电源0V；Third, the air switch QF03, the control circuit fuse FU03, the selection switch XK3, the start relay contact KM6no-2, the stop button SA4, and the start relay KM6 are connected in series to form the No. 2 water supply solenoid valve to manually start the self-holding circuit. The selection switch The contacts 2 and 4 of XK3 are turned on, and the power source 24V enters from the air switch QF03 and enters the power source 0V through the start relay KM6.
第四、由空气开关QF03、控制回路熔断器FU03、报警继电器触点KM2no-1、延时闭合时间继电器T1、择开关XK4、启动继电器触点KM6no-3、报警继电器KM7、DCS报警***串联构成出渣机水位低低声光报警回路，所述选择开关XK4的触点1、3导通；其中选择开关XK4的触点1、3导通时启动报警，选择开关XK4转至2、4触点时取消报警；所述报警继电器触点KM2no-1在出渣机水位低时得电吸合，延时闭合时间继电器T1开始计时，计时结束后若启动继电器触点KM6no-3还处于吸合状态，则触发DCS***出渣机水位低低声光报警，同时启动1号补水电磁阀运行；Fourth, it consists of air switch QF03, control circuit fuse FU03, alarm relay contact KM2no-1, delayed closing time relay T1, select switch XK4, start relay contact KM6no-3, alarm relay KM7, and DCS alarm system in series The slag discharger water level low sound and light alarm circuit, the contacts 1 and 3 of the selection switch XK4 are conductive; wherein the contacts 1 and 3 of the selection switch XK4 are activated when the contact is turned on, and the selection switch XK4 is turned to 2 and 4 contacts The alarm is canceled at the point of time; the alarm relay contact KM2no-1 is energized when the water level of the slag discharger is low, and the delay closing time relay T1 starts to time. If the timer contact KM6no-3 is still engaged after the timer is over, State, the low-level sound and light alarm of the DCS system slag discharger is triggered, and the No. 1 water supply solenoid valve is started to run;
第五、由空气开关QF03、控制回路熔断器FU03、水位开关YK3、报警继电器KM5、DCS报警***串联构成出渣机水位高报警控制回路，所述水位开关YK3检测到水位时，报警继电器KM5得电触发DCS***出渣机水位高报警；所述出渣机水位高报警时继电器KM5得电，继电器触点KM5nc-2断开，2号补水电磁阀自动启动控制回路断开；Fifth, the air switch QF03, the control circuit fuse FU03, the water level switch YK3, the alarm relay KM5, and the DCS alarm system are connected in series to form a high level water alarm control circuit of the slag discharger. When the water level switch YK3 detects the water level, the alarm relay KM5 has The DCS system triggers a high water level alarm of the slag discharger. When the slag discharger water level is high, the relay KM5 is energized, the relay contact KM5nc-2 is opened, and the control loop for automatic start of the water supply solenoid valve 2 is opened.
所述水位继电器YJ1、水位开关YK1-1、水位开关YK1-2的控制水位低于水位继电器YJ2、水位开关YK2；水位继电器YJ2、水位开关YK2的控制水位低于水位开关YK3的控制水位。The control water level of the water level relay YJ1, the water level switch YK1-1, the water level switch YK1-2 is lower than the water level relay YJ2, the water level switch YK2; the control water level of the water level relay YJ2, the water level switch YK2 is lower than the control water level of the water level switch YK3.
本发明的有益效果：本发明提出一种发电厂湿式出渣机补水阀两阀控制装置，包括控制箱、1号补水电磁阀、2号补水电磁阀，在所述控制箱安装有1号补水电磁阀主电路、2号补水电磁阀主电路、1号补水电磁阀控制回路及2号补水电磁阀控制回路；通过以上控制回路控制两套电磁阀，每个电磁阀均接受多个水位信号的控制，可以根据出渣机的水位控制需要启动电磁阀的数量，有效的解决现有技术中浮球阀、雷达水位计因水中含杂质、浮渣、泥等因素导致水位测量不准补水不及时或过多的问题。避免因补水出问题导致出渣机缺水时炉膛失去负压、过量的冷风进入炉膛还容易引起受热面结焦及烟气环保参数超标，受热面结焦严重后容易引起管屏爆管等一系列严重影响了设备及人生安全的问题。Beneficial effects of the present invention: The present invention provides a two-valve control device for a water supply valve of a wet slag discharger of a power plant, which includes a control box, a water supply solenoid valve No. 1 and a water supply solenoid valve No. 2. The water supply No. 1 is installed in the control box. The main circuit of solenoid valve, the main circuit of No. 2 water supply solenoid valve, the control circuit of No. 1 water supply solenoid valve and the control circuit of No. 2 water supply solenoid valve; through the above control loop, two sets of solenoid valves are controlled, and each solenoid valve receives multiple water level signals. Control, which can activate the number of solenoid valves according to the water level control of the slag discharger, effectively solve the water level measurement in the prior art due to the impurities, dross, mud and other factors in the water level caused by the impurities in the water. Too many questions. Avoiding the negative pressure of the slagging machine due to the problem of water supply, and the excessive cold air entering the furnace can easily cause coking of the heating surface and excessive environmental protection parameters of the flue gas. After the coking of the heating surface is serious, it will easily cause a series of serious tube explosion. Issues affecting equipment and life safety.
附图说明：Brief description of the drawings:
图1-图3为本发明第一个实施例的电路布置示意图，其中，图1为主电路布置示意图、图2是控制电路布置示意图，图3为选择开关触点放大结果示意图。FIGS. 1-3 are schematic diagrams of the circuit layout of the first embodiment of the present invention, wherein FIG. 1 is a schematic diagram of the main circuit layout, FIG. 2 is a schematic diagram of the control circuit layout, and FIG. 3 is a schematic diagram of the enlarged result of the selection switch contact.
具体实施方式：detailed description:
图1-图3为本发明第一个实施例的电路布置示意图，其中，图1为主电路布置示意图，图2是控制电路布置示意图，图3为选择开关触点放大结果示意图。FIGS. 1-3 are schematic diagrams of the circuit layout of the first embodiment of the present invention. Among them, FIG. 1 is a schematic diagram of the main circuit layout, FIG. 2 is a schematic diagram of the control circuit layout, and FIG.
图中显示，本例中，一种发电厂湿式出渣机补水阀两阀控制装置，其特征是，包括控制箱、1号补水电磁阀、2号补水电磁阀，在所述控制箱安装有1号补水电磁阀和2号补水电磁阀主电路及1号补水电磁阀和2号补水电磁阀控制回路；As shown in the figure, in this example, a two-valve control device for a water supply valve of a wet slag discharger of a power plant is characterized in that it includes a control box, a water supply solenoid valve No. 1 and a water supply solenoid valve No. 2. The control box is provided with Main circuit of No. 1 water supply solenoid valve and No. 2 water supply solenoid valve and No. 1 water supply solenoid valve and No. 2 water supply solenoid valve control circuit;
还包括3组水位测量装置，第一组水位测量装置包括水位继电器YJ1、水位开关YK1-1、水位开关YK1-2；第二组水位测量装置包括水位继电器YJ2、水位开关YK2；第三组水位测量装置包括水位开关YK3；It also includes three groups of water level measuring devices. The first group of water level measuring devices includes water level relay YJ1, water level switch YK1-1 and water level switch YK1-2. The second group of water level measuring devices includes water level relay YJ2 and water level switch YK2. The third group of water level The measuring device includes a water level switch YK3;
将出渣机的水位从低到高设置，依次分为低水位警戒线、高水位警戒线、高高水位警戒线共三条水位警戒线即四个区域；Set the water level of the slag discharger from low to high, and divide them into three water level warning lines, that is, four areas: low water level warning line, high water level warning line, and high water level warning line.
所述第一组水位测量装置安装在低水位警戒线；The first group of water level measuring devices is installed at a low water level warning line;
所述第二组水位测量装置安装在高水位警戒线；The second group of water level measuring devices is installed at a high water level warning line;
所述第三组水位测量装置安装在高高水位警戒线。The third group of water level measuring devices is installed on a high high water level warning line.
当出渣机水位处于低水位警戒线以下时，启动2号补水电磁阀，同时触发出渣机低水位声光报警，延时闭合时间继电器开始计时，延时闭合时间继电器闭合时若低水位报警仍在，启动1号补水电磁阀运行，同时触发水位低低报警。When the water level of the slag discharger is below the low water level warning line, the No. 2 water supply solenoid valve is activated, and the audible and visual alarm of the low water level of the slag discharger is triggered at the same time. The delayed closing time relay starts timing. Still, start the No. 1 water supply solenoid valve and trigger the low water alarm.
当出渣机水位超过低水位警戒线至高水位警戒线时(不含高水位警戒线)，1号补水电磁阀运行，2号补水电磁阀停止运行；When the water level of the slag discharger exceeds the low water level warning line to the high water level warning line (excluding the high water level warning line), the No. 1 water supply solenoid valve is operated, and the No. 2 water supply solenoid valve is stopped;
当出渣机水位超过高水位警戒线时(含高水位警戒线)，停止1号补水电磁阀运行；When the water level of the slag ejector exceeds the high water level warning line (including the high water level warning line), stop the No. 1 water supply solenoid valve operation;
当出渣机水位超过高高水位警戒线时，触发出渣机水位高声光报警，1号补水电磁阀及2号补水电磁阀启动控制回路断开。When the slag discharger water level exceeds the high and high water level warning line, the slag discharger water level high sound and light alarm is triggered, and the No. 1 water supply solenoid valve and the No. 2 water supply solenoid valve start control circuit are disconnected.
所述1号补水电磁阀主电路包括：火线L依次经过空器开关QF01,熔断器FU01、启动继电器触点KM1no-1、进入1号补水电磁阀后进入零线N。The main circuit of the No. 1 water-supplying solenoid valve includes: the live wire L passes through the empty switch QF01, the fuse FU01, the starting relay contact KM1no-1, and enters the zero line N after entering the No. 1 water-supplying solenoid valve.
所述1号补水电磁阀主电路还包括：火线L依次经过空器开关QF01,熔断器FU01、报警继电器触点KM7no-1、进入1号补水电磁阀后进入零线N。The main circuit of the No. 1 water-supplying solenoid valve further includes: the hot wire L passes through the empty switch QF01, the fuse FU01, the alarm relay contact KM7no-1, and enters the neutral line N after entering the No. 1 water-supplying solenoid valve.
所述2号补水电磁阀主电路包括：火线L依次经过空器开关QF02,熔断器FU02、启动继电器触点KM6no-1、进入2号补水电磁阀后进入零线N。The main circuit of the No. 2 water-supplying solenoid valve includes: the hot wire L passes through the empty switch QF02, the fuse FU02, the starting relay contact KM6no-1, and enters the neutral line N after entering the No. 2 water-supplying solenoid valve.
所述1号补水电磁阀控制回路包括：The control loop of the water supply solenoid valve No. 1 includes:
第一、由空气开关QF03、控制回路熔断器FU03、选择开关XK1、水位继电器YJ1、停止继电器触点KM3nc-1、中间继电器触点KM4nc-1、报警继电器触点KM5nc-1、停止按钮SA2、启动继电器KM1串联构成1号补水电磁阀自动启动回路，所述选择开关XK1的1、3触点导通，电源24V从空气开关QF03进入最后经过启动继电器KM1接入0V。First, by air switch QF03, control circuit fuse FU03, selection switch XK1, water level relay YJ1, stop relay contact KM3nc-1, intermediate relay contact KM4nc-1, alarm relay contact KM5nc-1, stop button SA2, The starting relay KM1 is connected in series to form the No. 1 water supply solenoid valve automatic starting circuit. The contacts 1, 3 of the selection switch XK1 are turned on, and the power source 24V enters from the air switch QF03 and finally enters 0V through the starting relay KM1.
第二、由空气开关QF03、控制回路熔断器FU03、选择开关XK1、水位开关YK1-1、水位开关YK1-2、停止继电器触点KM3nc-1、中间继电器触点KM4nc-1、报警继电器触点KM5nc-1、停止按钮SA2、启动继电器KM1串联构成1号补水电磁阀自动启动回路，所述选择开关XK1的1、3触点导通，电源24V从空气开关QF03进入最后经过启动继电器KM1接入0V。Second, by air switch QF03, control circuit fuse FU03, selection switch XK1, water level switch YK1-1, water level switch YK1-2, stop relay contact KM3nc-1, intermediate relay contact KM4nc-1, alarm relay contact KM5nc-1, stop button SA2, and start relay KM1 are connected in series to form the No. 1 water supply solenoid valve automatic start circuit. The contacts 1 and 3 of the selector switch XK1 are turned on, and the power source 24V enters from the air switch QF03 and enters through the start relay KM1. 0V.
第三、由空气开关QF03、控制回路熔断器FU03、选择开关XK1、手动启动按钮SA1、停止按钮SA2、继电器KM1串联构成1号补水电磁阀的手动启动控制回路，所述选择开关XK1的2、4触点导通，电源24V从空气开关QF03进入最后经过启动继电器KM1接入0V。Third, the manual start control loop of No. 1 water supply solenoid valve is formed by the air switch QF03, the control circuit fuse FU03, the selection switch XK1, the manual start button SA1, the stop button SA2, and the relay KM1 in series. The 4 contacts are turned on, and the power source 24V enters 0V from the air switch QF03 through the start relay KM1.
第四、由空气开关QF03、控制回路熔断器FU03、选择开关XK1、启动继电器触点KM1no-2、停止按钮SA2、继电器KM1串联构成1号补水电磁阀的手动启动自保持回路，所述选择开关XK1的2、4触点导通，电源24V从空气开关QF03进入最后经过启动继电器KM1接入0V。Fourth, the manual start self-holding circuit of the No. 1 water supply solenoid valve is formed by the air switch QF03, the control circuit fuse FU03, the selection switch XK1, the start relay contact KM1no-2, the stop button SA2, and the relay KM1 in series. The contacts 2 and 4 of XK1 are turned on, and the power source 24V enters from the air switch QF03 and finally enters 0V through the start relay KM1.
第五、由空气开关QF03、控制回路熔断器FU03、选择开关XK2、启动继电器触点KM1nc-1、停止继电器触点KM3nc-2、报警继电器KM2、DCS报警***串联构成出渣机水位低报警回路，所述的选择开关XK2的1、3触点导通，电源24V从空气开关QF03进入最后经过启动继电器KM1接入0V；所述出渣机水位下降至水位继电器YJ1、水位开关YK1-1、水位开关YK1-2所在平面以下时，启动继电器KM1失电，启动继电器触点KM1nc-1得电吸合，触发DCS***出渣机水位低报警，其中选择开关XK2的1、3触点导通时启动报警、选择开关XK2转至2、4触点时取消报警。Fifth, the air switch QF03, the control circuit fuse FU03, the selection switch XK2, the start relay contact KM1nc-1, the stop relay contact KM3nc-2, the alarm relay KM2, and the DCS alarm system are connected in series to form a low water level alarm circuit of the slag machine. The contacts 1 and 3 of the selection switch XK2 are turned on, and the power source 24V enters from the air switch QF03 and enters 0V through the start relay KM1; the water level of the slag discharger drops to the water level relay YJ1, the water level switch YK1-1, When the water level switch YK1-2 is below the level, the start relay KM1 loses power, and the start relay contact KM1nc-1 is energized, which triggers a low water alarm of the slag discharger of the DCS system. Among them, the 1, 3 contacts of the selection switch XK2 are turned on. When the alarm is activated, the alarm is canceled when the selector switch XK2 is turned to contacts 2 and 4.
第六、由空气开关QF03、控制回路熔断器FU03、水位继电器YJ2、停止继电器KM3串联构成1号补水电磁阀自动停止控制回路，电源24V从空气开关QF03进入最后经过停止继电器KM3接入0V，所述水位继电器YJ2检测到水位时，停止继电器KM3得电，停止继电器KM3触点KM3nc-1断开，启动继电器KM1失电，1号补水电磁阀停止运行；所述停止继电器KM3得电时，停止继电器触点KM3nc-2断开，DCS***出渣机水位低报警回路断开。Sixth, the air switch QF03, the control circuit fuse FU03, the water level relay YJ2, and the stop relay KM3 are connected in series to form the No. 1 water supply solenoid valve automatic stop control loop. The power source 24V enters from the air switch QF03 and enters 0V through the stop relay KM3. When the water level relay YJ2 detects the water level, the stop relay KM3 is energized, the stop relay KM3 contact KM3nc-1 is opened, the start relay KM1 is de-energized, and the water supply solenoid valve No. 1 stops operating; when the stop relay KM3 is energized, it stops The relay contact KM3nc-2 is disconnected, and the low-level alarm circuit of the slag discharger of the DCS system is disconnected.
第七、由空气开关QF03、控制回路熔断器FU03、水位开关YK2、停止继电器KM3串联构成1号补水电磁阀自动停止控制回路，电源24V从空气开关QF03进入最后经过停止继电器KM3接入电源0V，所述水位开关YK2检测到水位时，停止继电器KM3得电，停止继电器触点KM3nc-1失电断开，启动继电器KM1失电，1号补水电磁阀停止运行；所述停止继电器KM3得电时，停止继电器触点KM3nc-2断开，DCS***出渣机水位低报警回路断开。Seventh, the air switch QF03, the control circuit fuse FU03, the water level switch YK2, and the stop relay KM3 are connected in series to form the No. 1 water supply solenoid valve automatic stop control loop. The power source 24V enters from the air switch QF03 and enters the power supply 0V through the stop relay KM3. When the water level switch YK2 detects the water level, the stop relay KM3 is energized, the stop relay contact KM3nc-1 is de-energized and disconnected, the start relay KM1 is de-energized, and the water supply solenoid valve No. 1 is stopped. When the stop relay KM 3 is energized, , The stop relay contact KM3nc-2 is opened, and the low-level alarm circuit of the DCS system slag discharger is disconnected.
第八、由空气开关QF03、控制回路熔断器FU03、DCS***卸渣脉冲继电器触点、延时断开时间继电器T0、中间继电器KM4串联构成1号补水电磁阀延时启动控制回路，所述DCS***卸渣脉冲信号触点闭合时，延时断开时间继电器T0得电开始计时，中间继电器KM4得电，中间继电器触点4nc-1失电断开，启动继电器KM1失电，1号补水电磁阀停止运行；时间继电器T0计时结束时失电，继电器KM4失电，中间继电器触点KM4 4nc-1得电闭合，1号补水电磁阀恢复热备用状态，根据水位继电器、水位开关测量的水位判定是否需要投入运行，Eighth, the air switch QF03, the control circuit fuse FU03, the DCS system slag discharge pulse relay contact, the delayed off time relay T0, and the intermediate relay KM4 are connected in series to form the No. 1 water supply solenoid valve delayed start control loop, said DCS When the system's slag discharge pulse signal contact is closed, the delayed open time relay T0 starts to count, the intermediate relay KM4 receives power, the intermediate relay contact 4nc-1 loses power, and the start relay KM1 loses power. The valve stops running; time relay T0 loses power at the end of timing, relay KM4 loses power, intermediate relay contact KM4 and 4nc-1 are powered on, and the No. 1 water supply solenoid valve is restored to the hot standby state. It is determined based on the water level measured by the water level relay and water level switch. Whether it needs to be put into operation,
第九、由空气开关QF03、控制回路熔断器FU03、水位开关YK3、报警继电器KM5、DCS报警***串联构成出渣机水位高报警控制回路，所述水位开关YK3检测到水位时，报警继电器KM5得电触发DCS***出渣机水位高报警；所述出渣机水位高报警时继电器KM5得电，继电器触点KM5nc-1断开，1号补水电磁阀自动启动控制回路断开。Ninth, the air switch QF03, the control circuit fuse FU03, the water level switch YK3, the alarm relay KM5, and the DCS alarm system are connected in series to form a high-level alarm control circuit for the slag discharger. When the water level switch YK3 detects the water level, the alarm relay KM5 has The DCS system triggers a high water level alarm of the slag discharger; when the water level of the slag discharger is high, the relay KM5 is energized, the relay contact KM5nc-1 is opened, and the No. 1 water supply solenoid valve automatically starts the control circuit.
2号补水电磁阀控制回路包括：The control circuit of No. 2 water supply solenoid valve includes:
第一、由空气开关QF03、控制回路熔断器FU03、选择开关XK3、启动继电器触点KM1nc-2、报警继电器触点KM5nc-2、停止按钮SA4、启动继电器KM6串联构成2号补水电磁阀自动启动控制回路，所述选择开关XK3的1、3触点导通，电源24V从空气开关QF03进入，最后经过启动继电器KM6接入电源0V；所述出渣机水位下降至水位继电器YJ1、水位开关YK1-1、水位开关YK1-2的控制水位以下时，启动继电器触点KM1nc-2得电导通，启动继电器KM6得电，2号补水电磁阀投入运行；First, the air switch QF03, the control circuit fuse FU03, the selection switch XK3, the start relay contact KM1nc-2, the alarm relay contact KM5nc-2, the stop button SA4, and the start relay KM6 are connected in series to form the No. 2 water supply solenoid valve to automatically start In the control circuit, the contacts 1 and 3 of the selection switch XK3 are turned on, the power source 24V is entered from the air switch QF03, and finally the power supply 0V is connected through the start relay KM6; the slag discharger water level drops to the water level relay YJ1, the water level switch YK1 -1. When the water level switch YK1-2 is below the control water level, the starting relay contact KM1nc-2 is electrically connected, the starting relay KM6 is electrically connected, and the No. 2 water supply solenoid valve is put into operation;
第二、由空气开关QF03、控制回路熔断器FU03、选择开关XK3、手动启动按钮SA3、停止按钮SA4、启动继电器KM6串联构成2号补水电磁阀手动启动控制回路，所述选择开关XK3的2、4触点导通，电源24V从空气开关QF03进入最后经过启动继电器KM6接入电源0V。Second, the air switch QF03, the control circuit fuse FU03, the selection switch XK3, the manual start button SA3, the stop button SA4, and the start relay KM6 are connected in series to form the No. 2 water supply solenoid valve manual start control circuit. The 4 contacts are turned on, and the power supply 24V enters the power supply 0V from the air switch QF03 through the start relay KM6.
第三、由空气开关QF03、控制回路熔断器FU03、选择开关XK3、启动继电器触点KM6no-2、停止按钮SA4、启动继电器KM6串联构成2号补水电磁阀手动启动自保持回路，所述选择开关XK3的2、4触点导通，电源24V从空气开关QF03进入 最后经过启动继电器KM6接入电源0V。Third, the air switch QF03, the control circuit fuse FU03, the selection switch XK3, the start relay contact KM6no-2, the stop button SA4, and the start relay KM6 are connected in series to form the No. 2 water supply solenoid valve to manually start the self-holding circuit. The selection switch The contacts 2 and 4 of XK3 are turned on, and the power source 24V enters from the air switch QF03 and finally enters the power source 0V through the start relay KM6.
第四、由空气开关QF03、控制回路熔断器FU03、报警继电器触点KM2no-1、延时闭合时间继电器T1、择开关XK4、启动继电器触点KM6no-3、报警继电器KM7、DCS报警***串联构成出渣机水位低低声光报警回路，所述选择开关XK4的触点1、3导通；其中选择开关XK4的触点1、3导通时启动报警，选择开关XK4转至2、4触点时取消报警；所述报警继电器触点KM2no-1在出渣机水位低时得电吸合，延时闭合时间继电器T1开始计时，计时结束后若启动继电器触点KM6no-3还处于吸合状态，则触发DCS***出渣机水位低低声光报警，同时启动1号补水电磁阀运行。Fourth, it consists of air switch QF03, control circuit fuse FU03, alarm relay contact KM2no-1, delayed closing time relay T1, select switch XK4, start relay contact KM6no-3, alarm relay KM7, and DCS alarm system in series The slag discharger water level low sound and light alarm circuit, the contacts 1 and 3 of the selection switch XK4 are conductive; wherein the contacts 1 and 3 of the selection switch XK4 are activated when the contact is turned on, and the selection switch XK4 is turned to 2 and 4 contacts The alarm is canceled at the point of time; the alarm relay contact KM2no-1 is energized when the water level of the slag discharger is low, and the delay closing time relay T1 starts to time. If the timer contact KM6no-3 is still engaged after the timer is over, State, the low-level sound and light alarm of the DCS system slag discharger is triggered, and the water supply solenoid valve No. 1 is started to run at the same time.
第五、由空气开关QF03、控制回路熔断器FU03、水位开关YK3、报警继电器KM5、DCS报警***串联构成出渣机水位高报警控制回路，所述水位开关YK3检测到水位时，报警继电器KM5得电触发DCS***出渣机水位高报警；所述出渣机水位高报警时继电器KM5得电，继电器触点KM5nc-2断开，2号补水电磁阀自动启动控制回路断开。Fifth, the air switch QF03, the control circuit fuse FU03, the water level switch YK3, the alarm relay KM5, and the DCS alarm system are connected in series to form a high level water alarm control circuit of the slag discharger. When the water level switch YK3 detects the water level, the alarm relay KM5 has The DCS system triggers a high water level alarm of the slag discharger; when the water level of the slag discharger is high, the relay KM5 is energized, the relay contact KM5nc-2 is opened, and the No. 2 water supply solenoid valve automatically starts the control circuit.
所述水位继电器YJ1、水位开关YK1-1、水位开关YK1-2的控制水位低于水位继电器YJ2、水位开关YK2；水位继电器YJ2、水位开关YK2的控制水位低于水位开关YK3的控制水位。The control water level of the water level relay YJ1, the water level switch YK1-1, the water level switch YK1-2 is lower than the water level relay YJ2, the water level switch YK2; the control water level of the water level relay YJ2, the water level switch YK2 is lower than the control water level of the water level switch YK3.

Claims (1)

  1. 一种发电厂湿式出渣机补水阀两阀控制装置，其特征是，包括控制箱、1号补水电磁阀、2号补水电磁阀，在所述控制箱安装有1号补水电磁阀主电路、2号补水电磁阀主电路、1号补水电磁阀控制回路及2号补水电磁阀控制回路；The utility model relates to a two-valve control device for a water supply valve of a wet slag discharger of a power plant, which comprises a control box, a water supply solenoid valve No. 1 and a water supply solenoid valve No. 2. The main circuit of the water supply solenoid valve No. 1 is installed in the control box. Main circuit of No. 2 water supply solenoid valve, control circuit of No. 1 water supply solenoid valve and control circuit of No. 2 water supply solenoid valve;
    还包括3组水位测量装置，第一组水位测量装置包括水位继电器YJ1、水位开关YK1-1、水位开关YK1-2；第二组水位测量装置包括水位继电器YJ2、水位开关YK2；第三组水位测量装置包括水位开关YK3；It also includes three groups of water level measuring devices. The first group of water level measuring devices includes water level relay YJ1, water level switch YK1-1 and water level switch YK1-2. The second group of water level measuring devices includes water level relay YJ2 and water level switch YK2. The third group of water level The measuring device includes a water level switch YK3;
    将出渣机的水位从低到高设置，依次分为低水位警戒线、高水位警戒线、高高水位警戒线共三条水位警戒线即四个区域；所述第一组水位测量装置安装在低水位警戒线；所述第二组水位测量装置安装在高水位警戒线；所述第三组水位测量装置安装在高高水位警戒线。The water level of the slag discharger is set from low to high, and is divided into a low water level warning line, a high water level warning line, and a high water level warning line. There are three water level warning lines, that is, four areas; the first group of water level measuring devices is installed in The low water level warning line; the second group of water level measuring devices are installed on the high water level warning line; the third group of water level measuring devices are installed on the high water level warning line.
    当出渣机水位处于低水位警戒线以下时，启动2号补水电磁阀，同时触发出渣机低水位声光报警，延时闭合时间继电器开始计时，延时闭合时间继电器闭合时若低水位报警仍在，启动1号补水电磁阀运行，同时触发水位低低报警；When the water level of the slag discharger is below the low water level warning line, the No. 2 water supply solenoid valve is activated, and the audible and visual alarm of the low water level of the slag discharger is triggered at the same time. The delayed closing time relay starts timing. Still on, start No. 1 water supply solenoid valve operation and trigger low water level alarm at the same time;
    当出渣机水位超过低水位警戒线至高水位警戒线时(不含高水位警戒线)，1号补水电磁阀运行，2号补水电磁阀停止运行；When the water level of the slag discharger exceeds the low water level warning line to the high water level warning line (excluding the high water level warning line), the No. 1 water supply solenoid valve is operated, and the No. 2 water supply solenoid valve is stopped;
    当出渣机水位超过高水位警戒线时(含高水位警戒线)，停止1号补水电磁阀运行；When the water level of the slag ejector exceeds the high water level warning line (including the high water level warning line), stop the No. 1 water supply solenoid valve operation;
    当出渣机水位超过高高水位警戒线时，触发出渣机水位高声光报警，1号补水电磁阀及2号补水电磁阀启动控制回路断开；When the water level of the slag discharger exceeds the high and high water level warning line, the high sound and light alarm of the slag discharger water level is triggered, and the start-up control circuit of No. 1 water supply solenoid valve and No. 2 water supply solenoid valve is disconnected;
    所述1号补水电磁阀主电路包括：火线L依次经过空器开关QF01,熔断器FU01、启动继电器触点KM1no-1、进入1号补水电磁阀后进入零线N；The main circuit of the No. 1 water-supplying solenoid valve includes: the hot wire L passes through the empty switch QF01, the fuse FU01, the starting relay contact KM1no-1, and enters the zero line N after entering the No. 1 water-supplying solenoid valve;
    所述1号补水电磁阀主电路包括：火线L依次经过空器开关QF01,熔断器FU01、报警继电器触点KM7no-1、进入1号补水电磁阀后进入零线N；The main circuit of the No. 1 water-supplying solenoid valve includes: the hot wire L passes through the empty switch QF01, the fuse FU01, the alarm relay contact KM7no-1, and enters the zero line N after entering the No. 1 water-supplying solenoid valve;
    所述2号补水电磁阀主电路包括：火线L依次经过空器开关QF02,熔断器FU02、启动继电器触点KM6no-1、进入2号补水电磁阀后进入零线N；The main circuit of the No. 2 water-supplying solenoid valve includes: the hot wire L passes through the empty switch QF02, the fuse FU02, the start relay contact KM6no-1, and enters the zero line N after entering the No. 2 water-supplying solenoid valve;
    所述1号补水电磁阀控制回路包括：The control loop of the water supply solenoid valve No. 1 includes:
    第一、由空气开关QF03、控制回路熔断器FU03、选择开关XK1、水位继电器YJ1、停止继电器触点KM3nc-1、中间继电器触点KM4nc-1、报警继电器触点KM5nc-1、停止按钮SA2、启动继电器KM1串联构成1号补水电磁阀自动启动回路，所述选择开关XK1的1、3触点导通，电源24V从空气开关QF03进入最后经过启动继电器KM1接入0V；First, by air switch QF03, control circuit fuse FU03, selection switch XK1, water level relay YJ1, stop relay contact KM3nc-1, intermediate relay contact KM4nc-1, alarm relay contact KM5nc-1, stop button SA2, The starter relay KM1 is connected in series to form the No. 1 water-supply solenoid valve automatic starter circuit. The contacts 1 and 3 of the selector switch XK1 are turned on, and the power source 24V enters from the air switch QF03 and finally enters 0V through the starter relay KM1.
    第二、由空气开关QF03、控制回路熔断器FU03、选择开关XK1、水位开关YK1-1、水位开关YK1-2、停止继电器触点KM3nc-1、中间继电器触点KM4nc-1、报警继电器触点KM5nc-1、停止按钮SA2、启动继电器KM1串联构成1号补水电磁阀自动启动回路，所述选择开关XK1的1、3触点导通，电源24V从空气开关QF03进入最后经过启动继电器KM1接入0V；Second, by air switch QF03, control circuit fuse FU03, selection switch XK1, water level switch YK1-1, water level switch YK1-2, stop relay contact KM3nc-1, intermediate relay contact KM4nc-1, alarm relay contact KM5nc-1, stop button SA2, and start relay KM1 are connected in series to form the No. 1 water supply solenoid valve automatic start circuit. The contacts 1 and 3 of the selector switch XK1 are turned on, and the power source 24V enters from the air switch QF03 and enters through the start relay KM1. 0V;
    第三、由空气开关QF03、控制回路熔断器FU03、选择开关XK1、手动启动按钮SA1、停止按钮SA2、继电器KM1串联构成1号补水电磁阀的手动启动控制回路，所述选择开关XK1的2、4触点导通，电源24V从空气开关QF03进入最后经过启动继电器KM1接入0V；Third, the manual start control loop of No. 1 water supply solenoid valve is formed by the air switch QF03, the control circuit fuse FU03, the selection switch XK1, the manual start button SA1, the stop button SA2, and the relay KM1 in series. 4 contacts are turned on, and the power source 24V enters 0V from the air switch QF03 and enters the start relay KM1;
    第四、由空气开关QF03、控制回路熔断器FU03、选择开关XK1、启动继电器触点KM1no-2、停止按钮SA2、继电器KM1串联构成1号补水电磁阀的手动启动自保持回路，所述选择开关XK1的2、4触点导通，电源24V从空气开关QF03进入最后经过启动继电器KM1接入0V；Fourth, the manual start self-holding circuit of the No. 1 water supply solenoid valve is formed by the air switch QF03, the control circuit fuse FU03, the selection switch XK1, the start relay contact KM1no-2, the stop button SA2, and the relay KM1 in series. The contacts 2 and 4 of XK1 are turned on, and the power source 24V enters from the air switch QF03 and finally enters 0V through the start relay KM1;
    第五、由空气开关QF03、控制回路熔断器FU03、选择开关XK2、启动继电器触点KM1nc-1、停止继电器触点KM3nc-2、报警继电器KM2、DCS报警***串联构成出渣机水位低报警回路，所述的选择开关XK2的1、3触点导通，电源24V从空气开关QF03进入最后经过启动继电器KM1接入0V；所述出渣机水位下降至水位继电器YJ1、水位开关YK1-1、水位开关YK1-2所在平面以下时，启动继电器KM1失电，启动继电器触点KM1nc-1得电吸合，触发DCS***出渣机水位低报警，其中选择开关XK2的1、3触点导通时启动报警、选择开关XK2转至2、4触点时取消报警；Fifth, the air switch QF03, the control circuit fuse FU03, the selection switch XK2, the start relay contact KM1nc-1, the stop relay contact KM3nc-2, the alarm relay KM2, and the DCS alarm system are connected in series to form a low water level alarm circuit of the slag machine. The contacts 1 and 3 of the selection switch XK2 are turned on, and the power source 24V enters from the air switch QF03 and enters 0V through the start relay KM1; the water level of the slag discharger drops to the water level relay YJ1, the water level switch YK1-1, When the water level switch YK1-2 is below the level, the start relay KM1 loses power, and the start relay contact KM1nc-1 is energized, which triggers a low water alarm of the slag discharger of the DCS system. Among them, the 1, 3 contacts of the selection switch XK2 are turned on. When the alarm is activated, the alarm is canceled when the selector switch XK2 is turned to contacts 2 and 4.
    第六、由空气开关QF03、控制回路熔断器FU03、水位继电器YJ2、停止继电器KM3串联构成1号补水电磁阀自动停止控制回路，电源24V从空气开关QF03进入最后经过停止继电器KM3接入0V，所述水位继电器YJ2检测到水位时，停止继电器KM3得电，停止继电器KM3触点KM3nc-1断开，启动继电器KM1失电，1号补水电磁阀停止运行；所述停止继电器KM3得电时，停止继电器触点KM3nc-2断开，DCS***出渣机水位低报警回路断开；Sixth, the air switch QF03, the control circuit fuse FU03, the water level relay YJ2, and the stop relay KM3 are connected in series to form the No. 1 water supply solenoid valve automatic stop control loop. The power source 24V enters from the air switch QF03 and enters 0V through the stop relay KM3. When the water level relay YJ2 detects the water level, the stop relay KM3 is energized, the stop relay KM3 contact KM3nc-1 is opened, the start relay KM1 is de-energized, and the water supply solenoid valve No. 1 stops operating; when the stop relay KM3 is energized, it stops The relay contact KM3nc-2 is disconnected, and the low-level alarm circuit of the DCS system slag discharger is disconnected;
    第七、由空气开关QF03、控制回路熔断器FU03、水位开关YK2、停止继电器KM3串联构成1号补水电磁阀自动停止控制回路，电源24V从空气开关QF03进入最后经过停止继电器KM3接入电源0V，所述水位开关YK2检测到水位时，停止继电器KM3得电，停止继电器触点KM3nc-1失电断开，启动继电器KM1失电，1号补水电磁阀停止运行；所述停止继电器KM3得电时，停止继电器触点KM3nc-2断开，DCS***出渣机水位低报警回路断开；Seventh, the air switch QF03, the control circuit fuse FU03, the water level switch YK2, and the stop relay KM3 are connected in series to form the No. 1 water supply solenoid valve automatic stop control loop. The power source 24V enters from the air switch QF03 and enters the power supply 0V through the stop relay KM3. When the water level switch YK2 detects the water level, the stop relay KM3 is energized, the stop relay contact KM3nc-1 is de-energized and disconnected, the start relay KM1 is de-energized, and the water supply solenoid valve No. 1 is stopped. When the stop relay KM 3 is energized, , The stop relay contact KM3nc-2 is disconnected, and the low-level alarm circuit of the slag discharger of the DCS system is disconnected;
    第八、由空气开关QF03、控制回路熔断器FU03、DCS***卸渣脉冲继电器触点、延时断开时间继电器T0、中间继电器KM4串联构成1号补水电磁阀延时启动控制回路，所述DCS***卸渣脉冲信号触点闭合时，延时断开时间继电器T0得电开始计时，中间继电器KM4得电，中间继电器触点4nc-1失电断开，启动继电器KM1失电，1号补水电磁阀停止运行；时间继电器T0计时结束时失电，继电器KM4失电，中间继电器触点KM4 4nc-1得电闭合，1号补水电磁阀恢复热备用状态，根据水位继电器、水位开关测量的水位判定是否需要投入运行；Eighth, the air switch QF03, the control circuit fuse FU03, the DCS system slag discharge pulse relay contact, the delayed off time relay T0, and the intermediate relay KM4 are connected in series to form the No. 1 water supply solenoid valve delayed start control loop, said DCS When the system's slag discharge pulse signal contact is closed, the delayed open time relay T0 starts to count, the intermediate relay KM4 receives power, the intermediate relay contact 4nc-1 loses power, and the start relay KM1 loses power. The valve stops running; time relay T0 loses power at the end of timing, relay KM4 loses power, intermediate relay contact KM4 and 4nc-1 are powered on, and the No. 1 water supply solenoid valve is restored to the hot standby state. It is determined based on the water level measured by the water level relay and water level switch. Whether it needs to be put into operation;
    第九、由空气开关QF03、控制回路熔断器FU03、水位开关YK3、报警继电器KM5、DCS报警***串联构成出渣机水位高报警控制回路，所述水位开关YK3检测到水位时，报警继电器KM5得电触发DCS***出渣机水位高报警；所述出渣机水位高报警时继电器KM5得电，继电器触点KM5nc-1断开，1号补水电磁阀自动启动控制回路断开；Ninth, the air switch QF03, the control circuit fuse FU03, the water level switch YK3, the alarm relay KM5, and the DCS alarm system are connected in series to form a high-level alarm control circuit for the slag discharger. When the water level switch YK3 detects the water level, the alarm relay KM5 has The DCS system triggers the high water level alarm of the slag discharger electrically; when the slag discharger water level is high, the relay KM5 is energized, the relay contact KM5nc-1 is opened, and the No. 1 water supply solenoid valve automatically starts the control circuit to open;
    所述2号补水电磁阀控制回路包括：The control circuit of the water supply solenoid valve No. 2 includes:
    第一、由空气开关QF03、控制回路熔断器FU03、选择开关XK3、启动继电器触点KM1nc-2、报警继电器触点KM5nc-2、停止按钮SA4、启动继电器KM6串联构成2号补水电磁阀自动启动控制回路，所述选择开关XK3的1、3触点导通，电源24V从空气开关QF03进入，最后经过启动继电器KM6接入电源0V；所述出渣机水位下降至水位继电器YJ1、水位开关YK1-1、水位开关YK1-2的控制水位以下时，启动继电器触点KM1nc-2导通，启动继电器KM6得电，2号补水电磁阀投入运行；First, the air switch QF03, the control circuit fuse FU03, the selection switch XK3, the start relay contact KM1nc-2, the alarm relay contact KM5nc-2, the stop button SA4, and the start relay KM6 are connected in series to form the No. 2 water supply solenoid valve to automatically start In the control circuit, the contacts 1 and 3 of the selection switch XK3 are turned on, the power source 24V is entered from the air switch QF03, and finally the power supply 0V is connected through the start relay KM6; the slag discharger water level drops to the water level relay YJ1, the water level switch YK1 -1. When the water level switch YK1-2 is below the control water level, the start relay contact KM1nc-2 is turned on, the start relay KM6 is energized, and the No. 2 water supply solenoid valve is put into operation;
    第二、由空气开关QF03、控制回路熔断器FU03、选择开关XK3、手动启动按钮SA3、停止按钮SA4、启动继电器 KM6串联构成2号补水电磁阀手动启动控制回路，所述选择开关XK3的2、4触点导通，电源24V从空气开关QF03进入最后经过启动继电器KM6接入电源0V；Second, the air switch QF03, the control circuit fuse FU03, the selection switch XK3, the manual start button SA3, the stop button SA4, and the start relay KM6 are connected in series to form the No. 2 water supply solenoid valve manual start control circuit. The 4 contacts are turned on, and the power source 24V enters the power source 0V from the air switch QF03 through the start relay KM6;
    第三、由空气开关QF03、控制回路熔断器FU03、选择开关XK3、启动继电器触点KM6no-2、停止按钮SA4、启动继电器KM6串联构成2号补水电磁阀手动启动自保持回路，所述选择开关XK3的2、4触点导通，电源24V从空气开关QF03进入最后经过启动继电器KM6接入电源0V；Third, the air switch QF03, the control circuit fuse FU03, the selection switch XK3, the start relay contact KM6no-2, the stop button SA4, and the start relay KM6 are connected in series to form the No. 2 water supply solenoid valve to manually start the self-holding circuit. The selection switch The contacts 2 and 4 of XK3 are turned on, and the power source 24V enters from the air switch QF03 and enters the power source 0V through the start relay KM6.
    第四、由空气开关QF03、控制回路熔断器FU03、报警继电器触点KM2no-1、延时闭合时间继电器T1、择开关XK4、启动继电器触点KM6no-3、报警继电器KM7、DCS报警***串联构成出渣机水位低低声光报警回路，所述选择开关XK4的触点1、3导通；其中选择开关XK4的触点1、3导通时启动报警，选择开关XK4转至2、4触点时取消报警；所述报警继电器触点KM2no-1在出渣机水位低时得电吸合，延时闭合时间继电器T1开始计时，计时结束后若启动继电器触点KM6no-3还处于吸合状态，则触发DCS***出渣机水位低低声光报警，同时启动1号补水电磁阀运行；Fourth, it consists of air switch QF03, control circuit fuse FU03, alarm relay contact KM2no-1, delayed closing time relay T1, select switch XK4, start relay contact KM6no-3, alarm relay KM7, and DCS alarm system in series The slag discharger water level low sound and light alarm circuit, the contacts 1 and 3 of the selection switch XK4 are conductive; wherein the contacts 1 and 3 of the selection switch XK4 are activated when the contact is turned on, and the selection switch XK4 is turned to 2 and 4 contacts The alarm is canceled at the point of time; the alarm relay contact KM2no-1 is energized when the water level of the slag discharger is low, and the delay closing time relay T1 starts to time. If the timer contact KM6no-3 is still engaged after the timer is over, State, the low-level sound and light alarm of the DCS system slag discharger is triggered, and the No. 1 water supply solenoid valve is started to run;
    第五、由空气开关QF03、控制回路熔断器FU03、水位开关YK3、报警继电器KM5、DCS报警***串联构成出渣机水位高报警控制回路，所述水位开关YK3检测到水位时，报警继电器KM5得电触发DCS***出渣机水位高报警；所述出渣机水位高报警时继电器KM5得电，继电器触点KM5nc-2断开，2号补水电磁阀自动启动控制回路断开。Fifth, the air switch QF03, the control circuit fuse FU03, the water level switch YK3, the alarm relay KM5, and the DCS alarm system are connected in series to form a high level water alarm control circuit of the slag discharger. When the water level switch YK3 detects the water level, the alarm relay KM5 has The DCS system triggers a high water level alarm of the slag discharger; when the water level of the slag discharger is high, the relay KM5 is energized, the relay contact KM5nc-2 is opened, and the No. 2 water supply solenoid valve automatically starts the control circuit.
PCT/CN2018/104721 2018-09-08 2018-09-08 Two-valve control device for water supplementation valve of wet-type slag discharger in power plant WO2020047873A1 (en)

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CN107013930A (en) * 2017-06-01 2017-08-04 深圳市能源环保有限公司 A kind of anti-blocking water replanishing device of garbage incinerating power plant dragveyer
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US20070095400A1 (en) * 2005-11-03 2007-05-03 Parker-Hannifin Corporation Shut-off valve system
KR20140148007A (en) * 2013-06-21 2014-12-31 하이펙 주식회사 Opening and closing apparatus for hydraulic valve
CN203395331U (en) * 2013-07-03 2014-01-15 南通天蓝环保能源成套设备有限公司 Control circuit of solenoid valve capable of automatically replenishing water
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