CN109000024B - Two valve control circuit of wet slag extractor water replenishing valve of power plant - Google Patents
Two valve control circuit of wet slag extractor water replenishing valve of power plant Download PDFInfo
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- CN109000024B CN109000024B CN201811046747.5A CN201811046747A CN109000024B CN 109000024 B CN109000024 B CN 109000024B CN 201811046747 A CN201811046747 A CN 201811046747A CN 109000024 B CN109000024 B CN 109000024B
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
- F23J1/06—Mechanically-operated devices, e.g. clinker pushers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention provides a two-valve control circuit of a water supplementing valve of a wet slag extractor of a power plant, which comprises a No. 1 water supplementing electromagnetic valve main circuit, a No. 2 water supplementing electromagnetic valve main circuit, a No. 1 water supplementing electromagnetic valve control loop and a No. 2 water supplementing electromagnetic valve control loop. Two sets of solenoid valves are controlled through a control loop, each solenoid valve is controlled by a plurality of water level signals, when the water levels of the slag extractor are different, the quantity of the solenoid valves is different, the quantity of the solenoid valves can be started according to the water level control requirement of the slag extractor, and the problems that in the prior art, a float valve and a radar water level gauge are inaccurate in water level measurement or too much in water supplement due to factors such as impurities, scum and mud in water can be effectively solved. The problems that when the slag extractor lacks water due to water supplementing and discharging, the hearth loses negative pressure, the opening of the induced draft fan is increased, a large amount of cold air enters the hearth to influence the combustion of the hearth, excessive cold air enters the hearth, coking of a heating surface and exceeding of smoke environment-friendly parameters are easily caused, and after the coking of the heating surface is serious, tube screen tube explosion and the like are easily caused, so that the equipment and life safety are seriously influenced are avoided.
Description
Technical Field
The invention relates to auxiliary equipment of a wet slag extractor of a power plant, in particular to a two-valve control circuit of a water supplementing valve of the wet slag extractor of the power plant.
Background
The slag after the fuel of the power plant is burnt out needs to be discharged out of the boiler, so that a wet slag extractor is matched, and the negative pressure of a hearth is ensured by injecting water into the slag extractor, thereby ensuring the safe and stable operation of boiler equipment and ensuring that the environmental protection parameters of the flue gas reach the standard for emission.
Because the water in the slag extractor is relatively turbid and contains more impurities, scum, foam and mud, the water level control of the slag extractor becomes a difficult problem. In the prior art, a water supplementing tank is arranged beside a slag extractor of a part of distribution power plant, a balance container is formed by a communicating pipe and the slag extractor, a filter screen is additionally arranged on the communicating pipe so as to prevent impurities and scum from entering the water supplementing tank, and then a mechanical float valve is utilized to automatically supplement water to the water tank or manually supplement water through a stop valve. This approach basically enables control of the tapping machine water level within ideal limits, but the control mode suffers from some safety and design drawbacks.
Because the slag extractor contains more impurities, scum and soil, the communicating pipe is easy to be blocked, and the inspection personnel need to dredge the communicating pipe between the slag extractor and the water tank at regular time every day, so that the normal water supplementing of the floating ball valve to the slag extractor can be ensured. If the inspection personnel forget to dredge the communicating pipe in other works, the water shortage of the slag extractor can be caused when the communicating pipe is blocked. When the float valve is damaged, abnormal water replenishing can be caused if the float valve is not found in time; when the water supplementing of the mechanical float valve is normal, water in the slag extractor can be extruded out of the slag extractor in the slag extraction process, the water level is reduced, and the water is supplemented to the slag extractor through the mechanical float valve. The slag extractor system is provided with a water recovery system, and overflowed water is recovered to the slag extractor. The water is added to the slag extractor during the slag extraction process, the water in the slag extractor overflows to the slag extractor after one slag extraction period is finished, the environment between slag extraction is affected, and the water overflows to the outside of a factory to pollute the environment and soil.
A water level sensor is arranged on the water supplementing tank of part of the power plants, automatic water supplementing is realized by measuring the water level of the water tank, but the normal water supplementing can be ensured only by periodically dredging the communicating pipe by a patrol personnel, and the reliability is low; some power plants are also provided with radar water level gauges above the slag extractor to automatically supplement water to the slag extractor by measuring the water level in the slag extractor, and the problem of inaccurate water level measurement caused by scum and foam problems cannot be solved, so that the water level cannot be ensured to be in a normal range. When the slag extractor lacks water, the hearth loses negative pressure, so that the opening of the induced draft fan is increased, a large amount of cold air enters the hearth to influence the combustion of the hearth, excessive cold air enters the hearth to easily cause coking of a heating surface and exceeding of environmental protection parameters of smoke, and after the coking of the heating surface is serious, the pipe screen is easily exploded, so that the equipment and the life safety are seriously influenced.
Disclosure of Invention
In order to solve the problems, the invention provides a two-valve control circuit for a water supplementing valve of a wet slag extractor of a power plant, which comprises a control box, a No. 1 water supplementing solenoid valve and a No. 2 water supplementing solenoid valve, wherein the control box is provided with a No. 1 water supplementing solenoid valve, a No. 2 water supplementing solenoid valve main circuit, a No. 1 water supplementing solenoid valve and a No. 2 water supplementing solenoid valve control circuit, the water level of the slag extractor is sequentially divided into four areas, namely, three water level guard lines of a low water level guard line, a high water level guard line and a high water level guard line, and different water level guard lines are monitored by arranging 3 groups of water level measuring devices, so that the No. 1 water supplementing solenoid valve and the No. 2 water supplementing solenoid valve are controlled. The problems that in the prior art, the water of the slag extractor contains impurities, scum, foam, mud and other factors, so that water supplement is not timely or too much due to inaccurate water level measurement of a ball float valve and a radar water level meter can be effectively solved, two electromagnetic valves are ensured to be put into operation when the water level of the slag extractor is low, one electromagnetic valve is ensured to be put into operation when the water level of the slag extractor is low, the operation of the electromagnetic valves is stopped when the water level is high, and a DCS audible and visual alarm system is introduced for warning the water level of the slag extractor, so that a main control room is awakened to strengthen monitoring of the water level of the slag extractor.
The technical scheme for solving the technical problems is as follows: the invention provides a two-valve control circuit of a wet slag extractor water supplementing valve of a power plant, which is characterized by comprising a No. 1 water supplementing electromagnetic valve main circuit, a No. 2 water supplementing electromagnetic valve main circuit, a No. 1 water supplementing electromagnetic valve control loop and a No. 2 water supplementing electromagnetic valve control loop;
the water supplementing valve No. 1 main circuit comprises: the live wire L sequentially passes through an air conditioner switch QF01, a fuse FU01, a starting relay contact KM1no-1 and a No. 1 water supplementing valve and then enters a zero line N;
the water supplementing valve No. 1 main circuit further comprises: the live wire L sequentially passes through an air-conditioner switch QF01, a fuse FU01, an alarm relay contact KM7no-1 and a No. 1 water supplementing valve and then enters a zero line N;
the water supplementing valve No. 2 main circuit comprises: the live wire L sequentially passes through an air-conditioner switch QF02, a fuse FU02, a starting relay contact KM6no-1 and a No. 2 water supplementing valve and then enters a zero line N;
the No. 1 water supplementing valve control loop comprises:
the automatic starting circuit of the No. 1 water supplementing valve is formed by connecting an air switch QF03, a control loop fuse FU03, a selection switch XK1, a water level relay YJ1, a stop relay contact KM3nc-1, an intermediate relay contact KM4nc-1, an alarm relay contact KM5nc-1, a stop button SA2 and a starting relay KM1 in series, wherein the 1 contact and the 3 contact of the selection switch XK1 are conducted, and a power supply 24V enters from the air switch QF03 and finally passes through the starting relay KM1 to be connected with 0V;
secondly, an automatic starting loop of a No. 1 water supplementing valve is formed by connecting an air switch QF03, a control loop fuse FU03, a selection switch XK1, a water level switch YK1-2, a stop relay contact KM3nc-1, an intermediate relay contact KM4nc-1, an alarm relay contact KM5nc-1, a stop button SA2 and a starting relay KM1 in series, wherein the 1 contact and the 3 contact of the selection switch XK1 are conducted, and a power supply 24V enters from the air switch QF03 and finally is accessed to 0V through the starting relay KM 1;
thirdly, a manual starting control loop of the No. 1 water supplementing valve is formed by connecting an air switch QF03, a control loop fuse FU03, a selection switch XK1, a manual starting button SA1, a stopping button SA2 and a relay KM1 in series, wherein contacts 2 and 4 of the selection switch XK1 are conducted, and a power supply 24V enters from the air switch QF03 and finally is connected with 0V through the starting relay KM 1;
fourthly, a manual starting self-holding loop of the No. 1 water supplementing electromagnetic valve is formed by connecting an air switch QF03, a control loop fuse FU03, a selection switch XK1, starting relay contacts KM1no-2, a stop button SA2 and a relay KM1 in series, wherein contacts 2 and 4 of the selection switch XK1 are conducted, and a power supply 24V enters from the air switch QF03 and finally is connected with 0V through the starting relay KM 1;
fifthly, an air switch QF03, a control loop fuse FU03, a selection switch XK2, a starting relay contact KM1nc-1, a stopping relay contact KM3nc-2, an alarm relay KM2 and a DCS alarm system are connected in series to form a slag extractor water level low alarm loop, wherein the 1 contact and the 3 contact of the selection switch XK2 are conducted, and a power supply 24V enters from the air switch QF03 and finally is connected with 0V through the starting relay KM 1; when the water level of the slag extractor drops below the plane where the water level relay YJ1, the water level switch YK1-1 and the water level switch YK1-2 are located, starting the relay KM1 to lose electricity, starting the relay contact KM1nc-1 to obtain electricity and absorb electricity, and triggering the DCS system slag extractor water level low alarm, wherein the alarm is started when the 1 contact and the 3 contact of the selection switch XK2 are conducted, and the alarm is canceled when the selection switch XK2 is turned to the 2 contact and the 4 contact;
sixthly, an automatic stop control loop of the water supplementing electromagnetic valve No. 1 is formed by connecting an air switch QF03, a control loop fuse FU03, a water level relay YJ2 and a stop relay KM3 in series, a power supply 24V enters from the air switch QF03 and finally is connected with 0V through the stop relay KM3, when the water level relay YJ2 detects the water level, the stop relay KM3 is electrified, a contact KM3nc-1 of the stop relay KM3 is disconnected, the start relay KM1 is powered off, and the water supplementing electromagnetic valve No. 1 stops running; when the stop relay KM3 is powered on, a stop relay contact KM3nc-2 is disconnected, and a slag extractor water level low alarm loop of the DCS system is disconnected;
seventh, the automatic stop control loop of the water supplementing electromagnetic valve No. 1 is formed by connecting an air switch QF03, a control loop fuse FU03, a water level switch YK2 and a stop relay KM3 in series, a power supply 24V enters from the air switch QF03 and finally is connected with a power supply 0V through the stop relay KM3, when the water level switch YK2 detects the water level, the stop relay KM3 is powered on, a stop relay contact KM3nc-1 is powered off, the start relay KM1 is powered off, and the water supplementing electromagnetic valve No. 1 stops running; when the stop relay KM3 is powered on, a stop relay contact KM3nc-2 is disconnected, and a slag extractor water level low alarm loop of the DCS system is disconnected;
eighth, the air switch QF03, the control loop fuse FU03, the DCS system slag discharging pulse relay contact, the delay off time relay T0 and the intermediate relay KM4 are connected in series to form a No. 1 water supplementing electromagnetic valve delay starting control loop, when the DCS system slag discharging pulse signal contact is closed, the delay off time relay T0 starts to be electrified and the intermediate relay KM4 starts to be electrified, the intermediate relay contact 4nc-1 is in power-off state, the starting relay KM1 is in power-off state, and the No. 1 water supplementing electromagnetic valve stops running; when the timing of the time relay T0 is finished, the relay KM4 is powered off, the intermediate relay contact KM4 4nc-1 is powered on, the No. 1 water supplementing valve is restored to a hot standby state, and whether the operation is needed or not is judged according to the water level measured by the water level relay and the water level switch;
ninth, the air switch QF03, the control loop fuse FU03, the water level switch YK3, the alarm relay KM5 and the DCS alarm system are connected in series to form a slag extractor water level height alarm control loop, when the water level switch YK3 detects the water level, the alarm relay KM5 is electrified to trigger the DCS slag extractor water level height alarm; the relay KM5 is powered on when the water level of the slag extractor is high and alarms, the relay contact KM5nc-1 is disconnected, and the water supplementing valve No. 1 automatically starts a control loop to be disconnected;
the water supplementing valve control loop No. 2 comprises:
firstly, an automatic starting control loop of a No. 2 water supplementing valve is formed by connecting an air switch QF03, a control loop fuse FU03, a selection switch XK3, a starting relay contact KM1nc-2, an alarm relay contact KM5nc-2, a stop button SA4 and a starting relay KM6 in series, wherein the contacts 1 and 3 of the selection switch XK3 are conducted, a power supply 24V enters from the air switch QF03, and finally, the power supply 0V is connected through the starting relay KM 6; when the water level of the slag extractor drops below the control water level of the water level relay YJ1, the water level switch YK1-1 and the water level switch YK1-2, the starting relay contact KM1nc-2 is conducted, the starting relay KM6 is powered on, and the No. 2 water supplementing valve is put into operation;
secondly, an air switch QF03, a control loop fuse FU03, a selection switch XK3, a manual starting button SA3, a stopping button SA4 and a starting relay KM6 are connected in series to form a No. 2 water supplementing electromagnetic valve manual starting control loop, 2 contacts 4 of the selection switch XK3 are conducted, and a power supply 24V enters from the air switch QF03 and finally is connected with a power supply 0V through the starting relay KM 6;
thirdly, an air switch QF03, a control loop fuse FU03, a selection switch XK3, a starting relay contact KM6no-2, a stop button SA4 and a starting relay KM6 are connected in series to form a No. 2 water supplementing electromagnetic valve manual starting self-holding loop, the contacts 2 and 4 of the selection switch XK3 are conducted, and a power supply 24V enters from the air switch QF03 and finally is connected with a power supply 0V through the starting relay KM 6;
fourthly, an air switch QF03, a control loop fuse FU03, an alarm relay contact KM2no-1, a delay closing time relay T1, a selector switch XK4, a starting relay contact KM6no-3, an alarm relay KM7 and a DCS alarm system are connected in series to form a low-water-level low-sound-light alarm loop of the slag extractor, and the contacts 1 and 3 of the selector switch XK4 are conducted; the contacts 1 and 3 of the selection switch XK4 are conducted to start an alarm, and the alarm is canceled when the selection switch XK4 is turned to the contacts 2 and 4; the alarm relay contact KM2no-1 is electrified and closed when the water level of the slag extractor is low, the time delay closing time relay T1 starts to count time, and if the starting relay contact KM6no-3 is still in an attracting state after the counting time is finished, the low-water level low-sound and light alarm of the slag extractor of the DCS system is triggered, and meanwhile, the water supplementing valve No. 1 is started to operate;
fifthly, an air switch QF03, a control loop fuse FU03, a water level switch YK3, an alarm relay KM5 and a DCS alarm system are connected in series to form a slag extractor water level height alarm control loop, and when the water level switch YK3 detects the water level, the alarm relay KM5 is electrified to trigger the DCS slag extractor water level height alarm; the relay KM5 is powered on when the water level of the slag extractor is high and alarms, the relay contact KM5nc-2 is disconnected, and the water supplementing valve No. 2 automatically starts a control loop to be disconnected;
the control water levels of the water level relay YJ1, the water level switch YK1-1 and the water level switch YK1-2 are lower than those of the water level relay YJ2 and the water level switch YK2; the control water level of the water level relay YJ2 and the water level switch YK2 is lower than that of the water level switch YK 3.
The invention has the beneficial effects that: the invention provides a two-valve control circuit of a water supplementing valve of a wet slag extractor of a power plant, which comprises a No. 1 water supplementing electromagnetic valve main circuit, a No. 2 water supplementing electromagnetic valve main circuit, a No. 1 water supplementing electromagnetic valve control loop and a No. 2 water supplementing electromagnetic valve control loop; through two sets of solenoid valves of above control loop control, every solenoid valve all accepts the control of a plurality of water level signals, when the slag extractor water level is different, the quantity of start solenoid valve is different, can be according to the quantity that the water level control of slag extractor needs start solenoid valve, can effectually solve among the prior art ball cock valve, radar water gauge because of factors such as impurity, dross, mud contained in the water lead to the inaccurate moisturizing of water level measurement untimely or too much problem. The problems that when the slag extractor lacks water due to water supplementing and discharging, the hearth loses negative pressure, the opening of the induced draft fan is increased, a large amount of cold air enters the hearth to influence the combustion of the hearth, excessive cold air enters the hearth, coking of a heating surface and exceeding of smoke environment-friendly parameters are easily caused, and after the coking of the heating surface is serious, tube screen tube explosion and the like are easily caused, so that the equipment and life safety are seriously influenced are avoided.
Description of the drawings:
fig. 1 to 3 are schematic circuit arrangements according to a first embodiment of the present invention, in which fig. 1 is a schematic circuit arrangement of a main circuit, fig. 2 is a schematic circuit arrangement of a control circuit, and fig. 3 is an enlarged schematic circuit arrangement of a selection switch contact.
The specific embodiment is as follows:
fig. 1 to 3 are schematic circuit arrangements according to a first embodiment of the present invention, wherein fig. 1 is a schematic circuit arrangement of a main circuit, fig. 2 is a schematic circuit arrangement of a control circuit, and fig. 3 is an enlarged schematic circuit arrangement of a selection switch contact.
In the example, the two-valve control circuit of the water supplementing valve of the wet slag extractor of the power plant is characterized by comprising a No. 1 water supplementing electromagnetic valve main circuit, a No. 2 water supplementing electromagnetic valve main circuit, a No. 1 water supplementing electromagnetic valve control loop and a No. 2 water supplementing electromagnetic valve control loop;
the water supplementing valve No. 1 main circuit comprises: the live wire L sequentially passes through an air conditioner switch QF01, a fuse FU01, a starting relay contact KM1no-1 and a No. 1 water supplementing valve and then enters a zero line N.
The water supplementing valve No. 1 main circuit further comprises: the live wire L sequentially passes through an air conditioner switch QF01, a fuse FU01, an alarm relay contact KM7no-1 and a No. 1 water supplementing valve and then enters a zero line N.
The water supplementing valve No. 2 main circuit comprises: the live wire L sequentially passes through an air conditioner switch QF02, a fuse FU02, a starting relay contact KM6no-1 and a No. 2 water supplementing valve and then enters a zero line N.
The No. 1 water supplementing valve control loop comprises:
the automatic starting circuit of the No. 1 water supplementing valve is formed by connecting an air switch QF03, a control loop fuse FU03, a selection switch XK1, a water level relay YJ1, a stop relay contact KM3nc-1, an intermediate relay contact KM4nc-1, an alarm relay contact KM5nc-1, a stop button SA2 and a starting relay KM1 in series, wherein the 1 contact and the 3 contact of the selection switch XK1 are conducted, and a power supply 24V enters from the air switch QF03 and finally passes through the starting relay KM1 to be connected with 0V.
Secondly, an automatic starting loop of a No. 1 water supplementing valve is formed by connecting an air switch QF03, a control loop fuse FU03, a selection switch XK1, a water level switch YK1-2, a stop relay contact KM3nc-1, an intermediate relay contact KM4nc-1, an alarm relay contact KM5nc-1, a stop button SA2 and a starting relay KM1 in series, wherein the 1 contact and the 3 contact of the selection switch XK1 are conducted, and a power supply 24V enters from the air switch QF03 and finally is accessed to 0V through the starting relay KM 1.
Thirdly, a manual starting control loop of the No. 1 water supplementing electromagnetic valve is formed by connecting an air switch QF03, a control loop fuse FU03, a selection switch XK1, a manual starting button SA1, a stopping button SA2 and a relay KM1 in series, 2 and 4 contacts of the selection switch XK1 are conducted, and a power supply 24V enters from the air switch QF03 and finally is connected with 0V through the starting relay KM 1.
Fourthly, a manual starting self-holding loop of the No. 1 water supplementing electromagnetic valve is formed by connecting an air switch QF03, a control loop fuse FU03, a selection switch XK1, a starting relay contact KM1no-2, a stop button SA2 and a relay KM1 in series, wherein contacts 2 and 4 of the selection switch XK1 are conducted, and a power supply 24V enters from the air switch QF03 and finally is connected with 0V through the starting relay KM 1.
Fifthly, an air switch QF03, a control loop fuse FU03, a selection switch XK2, a starting relay contact KM1nc-1, a stopping relay contact KM3nc-2, an alarm relay KM2 and a DCS alarm system are connected in series to form a slag extractor water level low alarm loop, wherein the 1 contact and the 3 contact of the selection switch XK2 are conducted, and a power supply 24V enters from the air switch QF03 and finally is connected with 0V through the starting relay KM 1; when the water level of the slag extractor drops below the plane where the water level relay YJ1, the water level switch YK1-1 and the water level switch YK1-2 are located, the relay KM1 is started to lose electricity, the relay contact KM1nc-1 is started to be electrified and attracted, the low water level alarm of the slag extractor of the DCS system is triggered, wherein the alarm is started when the 1 contact and the 3 contact of the selection switch XK2 are conducted, and the alarm is canceled when the selection switch XK2 is turned to the 2 contact and the 4 contact.
Sixthly, an automatic stop control loop of the water supplementing electromagnetic valve No. 1 is formed by connecting an air switch QF03, a control loop fuse FU03, a water level relay YJ2 and a stop relay KM3 in series, a power supply 24V enters from the air switch QF03 and finally is connected with 0V through the stop relay KM3, when the water level relay YJ2 detects the water level, the stop relay KM3 is electrified, a contact KM3nc-1 of the stop relay KM3 is disconnected, the start relay KM1 is powered off, and the water supplementing electromagnetic valve No. 1 stops running; when the stop relay KM3 is powered on, the stop relay contact KM3nc-2 is disconnected, and a slag extractor water level low alarm loop of the DCS system is disconnected.
Seventh, the automatic stop control loop of the water supplementing electromagnetic valve No. 1 is formed by connecting an air switch QF03, a control loop fuse FU03, a water level switch YK2 and a stop relay KM3 in series, a power supply 24V enters from the air switch QF03 and finally is connected with a power supply 0V through the stop relay KM3, when the water level switch YK2 detects the water level, the stop relay KM3 is powered on, a stop relay contact KM3nc-1 is powered off, the start relay KM1 is powered off, and the water supplementing electromagnetic valve No. 1 stops running; when the stop relay KM3 is powered on, the stop relay contact KM3nc-2 is disconnected, and a slag extractor water level low alarm loop of the DCS system is disconnected.
Eighth, the air switch QF03, the control loop fuse FU03, the DCS system slag discharging pulse relay contact, the delay off time relay T0 and the intermediate relay KM4 are connected in series to form a No. 1 water supplementing electromagnetic valve delay starting control loop, when the DCS system slag discharging pulse signal contact is closed, the delay off time relay T0 starts to be electrified and the intermediate relay KM4 starts to be electrified, the intermediate relay contact 4nc-1 is in power-off state, the starting relay KM1 is in power-off state, and the No. 1 water supplementing electromagnetic valve stops running; when the time relay T0 is in a timing end, the relay KM4 is powered off, the intermediate relay contact KM4 4nc-1 is powered on, the No. 1 water supplementing valve is restored to a hot standby state, whether the operation is needed or not is judged according to the water level measured by the water level relay and the water level switch,
ninth, the air switch QF03, the control loop fuse FU03, the water level switch YK3, the alarm relay KM5 and the DCS alarm system are connected in series to form a slag extractor water level height alarm control loop, when the water level switch YK3 detects the water level, the alarm relay KM5 is electrified to trigger the DCS slag extractor water level height alarm; and when the water level of the slag extractor is high, the relay KM5 is powered on, the relay contact KM5nc-1 is disconnected, and the water supplementing valve No. 1 automatically starts a control loop to be disconnected.
The water supplementing valve control loop No. 2 comprises:
firstly, an automatic starting control loop of a No. 2 water supplementing valve is formed by connecting an air switch QF03, a control loop fuse FU03, a selection switch XK3, a starting relay contact KM1nc-2, an alarm relay contact KM5nc-2, a stop button SA4 and a starting relay KM6 in series, wherein the contacts 1 and 3 of the selection switch XK3 are conducted, a power supply 24V enters from the air switch QF03, and finally, the power supply 0V is connected through the starting relay KM 6; when the water level of the slag extractor drops below the control water level of the water level relay YJ1, the water level switch YK1-1 and the water level switch YK1-2, the relay contact KM1nc-2 is started to be electrically conducted, the relay KM6 is started to be electrically powered, and the water supplementing solenoid valve No. 2 is put into operation;
secondly, an air switch QF03, a control loop fuse FU03, a selection switch XK3, a manual starting button SA3, a stopping button SA4 and a starting relay KM6 are connected in series to form a No. 2 water supplementing electromagnetic valve manual starting control loop, 2 contacts and 4 contacts of the selection switch XK3 are conducted, and a power supply 24V enters from the air switch QF03 and finally is connected with a power supply 0V through the starting relay KM 6.
Thirdly, an air switch QF03, a control loop fuse FU03, a selection switch XK3, a starting relay contact KM6no-2, a stop button SA4 and a starting relay KM6 are connected in series to form a No. 2 water supplementing electromagnetic valve manual starting self-holding loop, the 2 contact and the 4 contact of the selection switch XK3 are conducted, and a power supply 24V enters from the air switch QF03 and finally is connected with the power supply 0V through the starting relay KM 6.
Fourthly, an air switch QF03, a control loop fuse FU03, an alarm relay contact KM2no-1, a delay closing time relay T1, a selector switch XK4, a starting relay contact KM6no-3, an alarm relay KM7 and a DCS alarm system are connected in series to form a low-water-level low-sound-light alarm loop of the slag extractor, and the contacts 1 and 3 of the selector switch XK4 are conducted; the contacts 1 and 3 of the selection switch XK4 are conducted to start an alarm, and the alarm is canceled when the selection switch XK4 is turned to the contacts 2 and 4; the alarm relay contact KM2no-1 is electrified and attracted when the water level of the slag extractor is low, the time delay closing time relay T1 starts to count time, and after the counting time is finished, if the starting relay contact KM6no-3 is still in an attracted state, the low-sound and light alarm of the water level of the slag extractor of the DCS system is triggered, and meanwhile, the water supplementing valve No. 1 is started to operate.
Fifthly, an air switch QF03, a control loop fuse FU03, a water level switch YK3, an alarm relay KM5 and a DCS alarm system are connected in series to form a slag extractor water level height alarm control loop, and when the water level switch YK3 detects the water level, the alarm relay KM5 is electrified to trigger the DCS slag extractor water level height alarm; and when the water level of the slag extractor is high, the relay KM5 is powered on, the relay contact KM5nc-2 is disconnected, and the water supplementing valve No. 2 automatically starts a control loop to be disconnected.
The control water levels of the water level relay YJ1, the water level switch YK1-1 and the water level switch YK1-2 are lower than those of the water level relay YJ2 and the water level switch YK2; the control water level of the water level relay YJ2 and the water level switch YK2 is lower than that of the water level switch YK 3.
Claims (1)
1. The two-valve control circuit for the water supplementing valve of the wet slag extractor of the power plant is characterized by comprising a No. 1 water supplementing electromagnetic valve main circuit, a No. 2 water supplementing electromagnetic valve main circuit, a No. 1 water supplementing electromagnetic valve control loop and a No. 2 water supplementing electromagnetic valve control loop;
the water supplementing valve No. 1 main circuit comprises: the live wire L sequentially passes through an air conditioner switch QF01, a fuse FU01, a starting relay contact KM1no-1 and a No. 1 water supplementing valve and then enters a zero line N;
the water supplementing valve No. 1 main circuit comprises: the live wire L sequentially passes through an air-conditioner switch QF01, a fuse FU01, an alarm relay contact KM7no-1 and a No. 1 water supplementing valve and then enters a zero line N;
the water supplementing valve No. 2 main circuit comprises: the live wire L sequentially passes through an air-conditioner switch QF02, a fuse FU02, a starting relay contact KM6no-1 and a No. 2 water supplementing valve and then enters a zero line N;
the No. 1 water supplementing valve control loop comprises:
the automatic starting circuit of the No. 1 water supplementing valve is formed by connecting an air switch QF03, a control loop fuse FU03, a selection switch XK1, a water level relay YJ1, a stop relay contact KM3nc-1, an intermediate relay contact KM4nc-1, an alarm relay contact KM5nc-1, a stop button SA2 and a starting relay KM1 in series, wherein the 1 contact and the 3 contact of the selection switch XK1 are conducted, and a power supply 24V enters from the air switch QF03 and finally passes through the starting relay KM1 to be connected with 0V;
secondly, an automatic starting loop of a No. 1 water supplementing valve is formed by connecting an air switch QF03, a control loop fuse FU03, a selection switch XK1, a water level switch YK1-2, a stop relay contact KM3nc-1, an intermediate relay contact KM4nc-1, an alarm relay contact KM5nc-1, a stop button SA2 and a starting relay KM1 in series, wherein the 1 contact and the 3 contact of the selection switch XK1 are conducted, and a power supply 24V enters from the air switch QF03 and finally is accessed to 0V through the starting relay KM 1;
thirdly, a manual starting control loop of the No. 1 water supplementing valve is formed by connecting an air switch QF03, a control loop fuse FU03, a selection switch XK1, a manual starting button SA1, a stopping button SA2 and a relay KM1 in series, wherein contacts 2 and 4 of the selection switch XK1 are conducted, and a power supply 24V enters from the air switch QF03 and finally is connected with 0V through the starting relay KM 1;
fourthly, a manual starting self-holding loop of the No. 1 water supplementing electromagnetic valve is formed by connecting an air switch QF03, a control loop fuse FU03, a selection switch XK1, starting relay contacts KM1no-2, a stop button SA2 and a relay KM1 in series, wherein contacts 2 and 4 of the selection switch XK1 are conducted, and a power supply 24V enters from the air switch QF03 and finally is connected with 0V through the starting relay KM 1;
fifthly, an air switch QF03, a control loop fuse FU03, a selection switch XK2, a starting relay contact KM1nc-1, a stopping relay contact KM3nc-2, an alarm relay KM2 and a DCS alarm system are connected in series to form a slag extractor water level low alarm loop, wherein the 1 contact and the 3 contact of the selection switch XK2 are conducted, and a power supply 24V enters from the air switch QF03 and finally is connected with 0V through the starting relay KM 1; when the water level of the slag extractor drops below the plane where the water level relay YJ1, the water level switch YK1-1 and the water level switch YK1-2 are located, starting the relay KM1 to lose electricity, starting the relay contact KM1nc-1 to obtain electricity and absorb electricity, and triggering the DCS system slag extractor water level low alarm, wherein the alarm is started when the 1 contact and the 3 contact of the selection switch XK2 are conducted, and the alarm is canceled when the selection switch XK2 is turned to the 2 contact and the 4 contact;
sixthly, an automatic stop control loop of the water supplementing electromagnetic valve No. 1 is formed by connecting an air switch QF03, a control loop fuse FU03, a water level relay YJ2 and a stop relay KM3 in series, a power supply 24V enters from the air switch QF03 and finally is connected with 0V through the stop relay KM3, when the water level relay YJ2 detects the water level, the stop relay KM3 is electrified, a contact KM3nc-1 of the stop relay KM3 is disconnected, the start relay KM1 is powered off, and the water supplementing electromagnetic valve No. 1 stops running; when the stop relay KM3 is powered on, a stop relay contact KM3nc-2 is disconnected, and a slag extractor water level low alarm loop of the DCS system is disconnected;
seventh, the automatic stop control loop of the water supplementing electromagnetic valve No. 1 is formed by connecting an air switch QF03, a control loop fuse FU03, a water level switch YK2 and a stop relay KM3 in series, a power supply 24V enters from the air switch QF03 and finally is connected with a power supply 0V through the stop relay KM3, when the water level switch YK2 detects the water level, the stop relay KM3 is powered on, a stop relay contact KM3nc-1 is powered off, the start relay KM1 is powered off, and the water supplementing electromagnetic valve No. 1 stops running; when the stop relay KM3 is powered on, a stop relay contact KM3nc-2 is disconnected, and a slag extractor water level low alarm loop of the DCS system is disconnected;
eighth, the air switch QF03, the control loop fuse FU03, the DCS system slag discharging pulse relay contact, the delay off time relay T0 and the intermediate relay KM4 are connected in series to form a No. 1 water supplementing electromagnetic valve delay starting control loop, when the DCS system slag discharging pulse signal contact is closed, the delay off time relay T0 starts to be electrified and the intermediate relay KM4 starts to be electrified, the intermediate relay contact 4nc-1 is in power-off state, the starting relay KM1 is in power-off state, and the No. 1 water supplementing electromagnetic valve stops running; when the timing of the time relay T0 is finished, the relay KM4 is powered off, the intermediate relay contact KM4 4nc-1 is powered on, the No. 1 water supplementing valve is restored to a hot standby state, and whether the operation is needed or not is judged according to the water level measured by the water level relay and the water level switch;
ninth, the air switch QF03, the control loop fuse FU03, the water level switch YK3, the alarm relay KM5 and the DCS alarm system are connected in series to form a slag extractor water level height alarm control loop, when the water level switch YK3 detects the water level, the alarm relay KM5 is electrified to trigger the DCS slag extractor water level height alarm; the relay KM5 is powered on when the water level of the slag extractor is high and alarms, the relay contact KM5nc-1 is disconnected, and the water supplementing valve No. 1 automatically starts a control loop to be disconnected;
the No. 2 water supplementing valve control loop comprises:
firstly, an automatic starting control loop of a No. 2 water supplementing valve is formed by connecting an air switch QF03, a control loop fuse FU03, a selection switch XK3, a starting relay contact KM1nc-2, an alarm relay contact KM5nc-2, a stop button SA4 and a starting relay KM6 in series, wherein the contacts 1 and 3 of the selection switch XK3 are conducted, a power supply 24V enters from the air switch QF03, and finally, the power supply 0V is connected through the starting relay KM 6; when the water level of the slag extractor drops below the control water level of the water level relay YJ1, the water level switch YK1-1 and the water level switch YK1-2, the starting relay contact KM1nc-2 is conducted, the starting relay KM6 is powered on, and the No. 2 water supplementing valve is put into operation;
secondly, an air switch QF03, a control loop fuse FU03, a selection switch XK3, a manual starting button SA3, a stopping button SA4 and a starting relay KM6 are connected in series to form a No. 2 water supplementing electromagnetic valve manual starting control loop, 2 contacts 4 of the selection switch XK3 are conducted, and a power supply 24V enters from the air switch QF03 and finally is connected with a power supply 0V through the starting relay KM 6;
thirdly, an air switch QF03, a control loop fuse FU03, a selection switch XK3, a starting relay contact KM6no-2, a stop button SA4 and a starting relay KM6 are connected in series to form a No. 2 water supplementing electromagnetic valve manual starting self-holding loop, the contacts 2 and 4 of the selection switch XK3 are conducted, and a power supply 24V enters from the air switch QF03 and finally is connected with a power supply 0V through the starting relay KM 6;
fourthly, an air switch QF03, a control loop fuse FU03, an alarm relay contact KM2no-1, a delay closing time relay T1, a selector switch XK4, a starting relay contact KM6no-3, an alarm relay KM7 and a DCS alarm system are connected in series to form a low-water-level low-sound-light alarm loop of the slag extractor, and the contacts 1 and 3 of the selector switch XK4 are conducted; the contacts 1 and 3 of the selection switch XK4 are conducted to start an alarm, and the alarm is canceled when the selection switch XK4 is turned to the contacts 2 and 4; the alarm relay contact KM2no-1 is electrified and closed when the water level of the slag extractor is low, the time delay closing time relay T1 starts to count time, and if the starting relay contact KM6no-3 is still in an attracting state after the counting time is finished, the low-water level low-sound and light alarm of the slag extractor of the DCS system is triggered, and meanwhile, the water supplementing valve No. 1 is started to operate;
fifthly, an air switch QF03, a control loop fuse FU03, a water level switch YK3, an alarm relay KM5 and a DCS alarm system are connected in series to form a slag extractor water level height alarm control loop, and when the water level switch YK3 detects the water level, the alarm relay KM5 is electrified to trigger the DCS slag extractor water level height alarm; and when the water level of the slag extractor is high, the relay KM5 is powered on, the relay contact KM5nc-2 is disconnected, and the water supplementing valve No. 2 automatically starts a control loop to be disconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811046747.5A CN109000024B (en) | 2018-09-08 | 2018-09-08 | Two valve control circuit of wet slag extractor water replenishing valve of power plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811046747.5A CN109000024B (en) | 2018-09-08 | 2018-09-08 | Two valve control circuit of wet slag extractor water replenishing valve of power plant |
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| CN109000024A CN109000024A (en) | 2018-12-14 |
| CN109000024B true CN109000024B (en) | 2023-05-30 |
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| CN201811046747.5A Active CN109000024B (en) | 2018-09-08 | 2018-09-08 | Two valve control circuit of wet slag extractor water replenishing valve of power plant |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56167968A (en) * | 1980-05-26 | 1981-12-23 | Hitachi Plant Eng & Constr Co Ltd | Slide damper for gas sealing |
| JPS59185468U (en) * | 1983-05-26 | 1984-12-10 | 日立造船株式会社 | damper device |
| JPH06117410A (en) * | 1992-10-05 | 1994-04-26 | Sumitomo Constr Mach Co Ltd | Oil pressure circuit for construction machine |
| CN202181281U (en) * | 2011-07-19 | 2012-04-04 | 湖北三盟机械制造有限公司 | Temperature-controlled water replenishing device used on slag-water-tight extrusion type deslagging machine |
| CN204828723U (en) * | 2015-07-10 | 2015-12-02 | 青岛松灵电力环保设备有限公司 | Lime -ash storehouse governing valve of unloading |
-
2018
- 2018-09-08 CN CN201811046747.5A patent/CN109000024B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56167968A (en) * | 1980-05-26 | 1981-12-23 | Hitachi Plant Eng & Constr Co Ltd | Slide damper for gas sealing |
| JPS59185468U (en) * | 1983-05-26 | 1984-12-10 | 日立造船株式会社 | damper device |
| JPH06117410A (en) * | 1992-10-05 | 1994-04-26 | Sumitomo Constr Mach Co Ltd | Oil pressure circuit for construction machine |
| CN202181281U (en) * | 2011-07-19 | 2012-04-04 | 湖北三盟机械制造有限公司 | Temperature-controlled water replenishing device used on slag-water-tight extrusion type deslagging machine |
| CN204828723U (en) * | 2015-07-10 | 2015-12-02 | 青岛松灵电力环保设备有限公司 | Lime -ash storehouse governing valve of unloading |
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