CN203630645U - Electric heating control system of electrostatic precipitator in thermal power plant - Google Patents
Electric heating control system of electrostatic precipitator in thermal power plant Download PDFInfo
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- CN203630645U CN203630645U CN201320839544.8U CN201320839544U CN203630645U CN 203630645 U CN203630645 U CN 203630645U CN 201320839544 U CN201320839544 U CN 201320839544U CN 203630645 U CN203630645 U CN 203630645U
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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
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- 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 utility model provides an electric heating control system of an electrostatic precipitator in a thermal power plant. The electric heating control system comprises an electric heating control cabinet, a DCS system, an on-site electric heater and an on-site temperature measurement sensor, the electric heating control cabinet comprises an electric heating power loop, an electric heating control loop and an electric heating feedback loop, the electric heating control cabinet is the core portion of the system, the electric heating feedback loop receives a dry contact signal outputted by the DCS system, the electric heating control loop gives the feedback of the dry contact signal to the DCS system, the electric heating feedback loop is connected with the on-site temperature measurement sensor via a shielding temperature measurement cable, and the electric heating power loop is connected with the on-site electric heater via a power cable. According to the electric heating control system, the abut joint with the DCS system can be conveniently realized, the integration of the electric heating control system and multiple controllers between other subsystems is prevented, the manpower cost and financial resource cost are reduced, the maintenance and overhauling difficulties are reduced, and the technical guarantee for the highly-efficient management of an enterprise is provided.
Description
technical field:
The utility model relates to a kind of fuel-burning power plant electrostatic precipitator electric-heating control system, be particularly related to a kind of centralized management of electrostatic precipitator electric-heating control system DCS system, can realize easily with DCS system docking, avoid the software and hardware of multi-controller between electric-heating control system and other subsystems to integrate, manpower and financial resource cost are saved, plant maintenance and maintenance difficulty have been reduced, for the efficient management of enterprise provides technique guarantee simultaneously.
background technology:
Fuel-burning power plant electrostatic precipitator electric heater mainly comprises insulator, negative electrode porcelain axle and ash bucket electric heater at present.In electric heater actual moving process, for preventing the too low dewfall of insulator (porcelain axle) Yin Wendu, occur that a large amount of laying dusts of insulator are creepage, must keep the cathode support insulator of electric precipitation more than flue gas dew point temperature, make electric field can maintain higher high voltage supply level to obtain good dust collection effect.Electric duster ash bucket outside needs good Insulation interlayer equally, keeps ash bucket wall temperature higher than 10 ℃ of flue gas dew point temperature.
Existing most of electric heating control cabinet manufacturer provides single cover stored program controlled to complete function of temperature control, temperature control system isolated operation, common different manufacturer selects different model PLC(as selected Schneider PLC, Siemens PLC C or AB PLC etc.) realize required function, the controller difference using due to switch board, when being integrated with other subsystems again, it increases difficulty, as electrical heating cabinet uses Schneider PLC centralized control, but what DCS system was used is Siemens PLC C centralized management, if now need to integrate two cover systems, need adding hardware equipment to need to develop upper computer software interface simultaneously, expend a large amount of human and financial resources.
Simultaneously when electric heating system is gone into operation after operation, power plant's operation and maintainer need be familiar with the software and hardware control system that manufacturer provides, in the time of many covers centralized control, equally power plant's operation and maintainer are proposed to higher technical requirement, increase operation and maintenance difficulty, be also unfavorable for management simultaneously.
summary of the invention:
For above problem, the utility model provides a kind of fuel-burning power plant electrostatic precipitator electric-heating control system, native system is using electric heating control cabinet as core component, set up between DCS system, on-the-spot electric heater and temperature probe and contact around it, system can realize easily with DCS system docking, avoided multi-controller between electric-heating control system and other subsystems integration, manpower and financial resource cost are saved, plant maintenance and maintenance difficulty have been reduced, for the efficient management of enterprise provides technique guarantee simultaneously.
the purpose of this utility model realizes by following measures:
A kind of fuel-burning power plant electrostatic precipitator electric-heating control system, mainly comprises electric heating control cabinet, DCS system, on-the-spot electric heater and on-the-spot temperature probe; Described electric heating control cabinet comprises electrical heating power loop, electric heating control loop and electrical heating backfeed loop;
The core that described electric heating control cabinet is system, wherein electrical heating backfeed loop receives DCS system output dry contact signal, simultaneously by electric heating control circuit feedback dry contact signal to DCS system; Electrical heating backfeed loop is connected to on-the-spot temperature probe by shielding cable for measuring temperature, and is connected to on-the-spot electric heater by electrical heating power loop by power cable.
Described electrical heating power loop accesses multiple loops through bus-bar, and wherein single loop comprises miniature circuit breaker and A.C. contactor element, and electrical heating power loop outputting power cable also lays to on-the-spot electric heater, for electric heater provides electrical source of power.
Described electric heating control and electrical heating backfeed loop comprise three rotary switches of switch board panel (realize on the spot, long-range, shut down), DCS system output dry contact, panel start button, panel stop botton, temperature polling instrument and major loop A.C. contactor on the spot on the spot.Control and backfeed loop is realized the long-range start and stop of DCS of electric heater, start and stop and stopping function on the spot.
Described DCS system is made up of active station processor, controlling processor, Fieldbus Components and industrial power.
Described on-the-spot electric heater comprises insulator, negative electrode porcelain axle and ash bucket electric heater.Described on-the-spot temperature probe comprises that length is that 250mm(is for insulator, negative electrode porcelain axle electric heater) and 350mm(for ash bucket electric heater) PT100 thermometric platinum resistance.
the utlity model has following advantage:
1, for above problem, the utility model provides a kind of fuel-burning power plant electrostatic precipitator electric-heating control system, this system is using electric heating control cabinet as core component, in it, there is no Configuration Control Unit (as Siemens PLC C controller etc.), avoid the software and hardware of multi-controller between electric-heating control system and DCS system to integrate the inconvenience bringing, reduce electric heating control cabinet inner treater hardware configuration cost, eliminated the expense increasing with DCS system combination in prior art simultaneously.
2, electric-heating control system is gone into operation after operation, because it is that DCS independently controls, safeguards and overhauls and can be completed by the unification of DCS system operators, and human resources are used more effectively, and has saved manpower and financial resources cost.
3, electric-heating control system only by DCS system dry contact signal or on the spot button can realize temperature actuated, reduced operation easier, be easier to staff safeguard and maintenance.
accompanying drawing explanation:
Fig. 1 is electrostatic precipitator electric-heating control system figure;
Fig. 2 is electric heating control cabinet power loop electric diagram;
Fig. 3 is the single loop control of electric heating control cabinet and backfeed loop electric diagram.
embodiment:
As shown in Figure 1, electrostatic precipitator electric-heating control system of the present utility model, mainly comprises electric heating control cabinet, DCS system, electric heater and temperature probe.
1) electric heating control cabinet comprises electrical heating power loop, control and backfeed loop;
2) DCS system is made up of active station processor, controlling processor, Fieldbus Components and industrial power assembly etc.;
3) electric heater comprises insulator, negative electrode porcelain axle and ash bucket electric heater;
4) temperature probe comprises that length is the PT100 thermometric platinum resistance of 250mm and 350mm.
This some work process is as follows:
Electric heating control cabinet internally-powered loop provides electric heater electrical source of power, and its cabinet internally-powered cable laying is to on-the-spot electric heater.Electric heating control cabinet cabinet bread is containing three rotary switches, realizes apparatus remote, on the spot and shut down three kinds of modes of operation.In the time that rotary switch rotates to Long-distance Control, DCS tele-control system output dry contact signal, to switch board, is realized temperature control closed-loop control by electric heating control cabinet internal temperature logging collecting temperature sensor temperature measurement signal simultaneously; In the time that rotary switch rotation is extremely controlled on the spot, start or stop button by electric heating control cabinet panel and realize start and stop firing equipment function on the spot.Electric heating control cabinet provides electric heater operation dry contact signal to DCS system simultaneously.
Fig. 2 shows electric heating control cabinet power loop electric diagram.This loop mainly comprises the elements such as switch board inlet wire breaker of plastic casing QF0, electric heater power loop miniature circuit breaker QF101 ~ QF112, A.C. contactor KM101 ~ KM112, reometer and voltage table.
1) the empty choice-start of electrical heating power loop iC65 series mini isolating switch, iC65 miniature circuit breaker is a kind of current limiting type circuit breaker.In the time that supply line occurs short circuit and exceedes cut-off current, circuit breaker trip electromagnetic actuator pushes away (drawing) moving contact fast, produces electric arc, sets up arc voltage, has increased the transient impedance between dynamic/static contact, realizes the object of limiting short-circuit current value.Because electric heater is resistive load, in power loop, select C type micro-disconnected as loop lead-in circuit breaker, its instantaneous trip scope is the rated current of 5 ~ 10 times, under 230/400V condition, specified short-circuit capacity Icn is 6kA.
2) in power loop, A.C. contactor is selected Schneider TeSys series contactor, and the rated operational current of its main contact is greater than the electric current of load circuit.
This some work process is as follows:
Take conventional two chambers four electric field electrostatic precipitator as example, separate unit stove comprises two electric precipitator, is respectively 1# electric precipitator, 2# electric precipitator; Every electric precipitator comprises two chambers, is respectively A chamber and B chamber.
Electric heating control cabinet power loop comprises 1# electric precipitator A chamber 4 road insulators, 4 road negative electrode porcelain axles and No. 4 ash bucket electric heaters (single ash bucket electric field), described electric heater is two-phase 380V power supply, power is respectively 4.5kW, 1kW, 4.5kW, its rated current is respectively 12A, 3A, 12A, and configuration miniature circuit breaker QF101 ~ QF104, QF105 ~ QF108, QF109 ~ QF112 model are respectively iC65N – C20A/2P, iC65N – C6A/2P, iC65N – C20A/2P.Power loop rear class A.C. contactor KM101 ~ KM104, KM105 ~ KM108, KM109 ~ KM112 select model to be respectively LC1D25M7C, LC1D09M7C, LC1D25M7C.Electric heating control cabinet peak load is 40kW, and power factor (PF) is 0.8, and simultaneity factor is 0.7, and system inlet wire current reaches 58.9A left and right, and it is NSX100N MA 100 3P FC that lead-in circuit breaker QF0 specification is selected in design, and its breaking capacity is 50kA.Selecting current transformer TA1 ~ TA3 model according to power loop inlet wire current numerical Design is BH-0.66-30 I 100/5.
Electric heating control cabinet cabinet bread, containing three reometers and a voltage table, shows inlet wire current and magnitude of voltage in real time.Current transformer output signal is connected to reometer, and it is ZT6L2-A 100/5A that reometer model is selected in design, inlet wire breaker of plastic casing end opening U, V two phase voltage signal access voltage tables, and voltage table type design is selected the 450V into ZT6L2-V.
Fig. 3 shows the single loop control of electric heating control cabinet and backfeed loop electric diagram.
Described control and backfeed loop comprise that report to the police output dry contact, pilot relay, three rotary switches of switch board panel (on the spot, long-range, shut down), the output of DCS system of the high lower bound of temperature polling instrument temperature often drives dry contact, electric heating control cabinet panel startup and stop botton, heating cabinet cabinet face run indicator and major loop A.C. contactor on the spot.
Described temperature polling instrument is selected multiloop digital display control instrument, input signal is PT100 platinum resistor temperature measuring signal, instrument be set be the multichannel output of reporting to the police respectively, by instrument face plate parameter set temperature bound warning numerical value and type of alarm, as 90 degree are set is instrument lower limit alarm temperature value, it is instrument upper limit alarm temperature value that 110 degree are set.
This some work process is as follows:
Electric-heating control system possess DCS program control, shut down and three kinds of operator schemes of start and stop on the spot.
1), under DCS Program Mode, by three rotary switch rotations of switch board panel, to long-range shelves, now heating circuit is by the control of DCS system remote.
In the time that DCS system output dry contact signal M101 is closed, control system is connected temperature polling instrument control loop, and the high lower bound numerical value of its temperature (if set temperature lower bound is 90 degree, high 110 degree that are limited to of temperature) is manually set on logging guidance panel.In control loop, K1-1, K1-2 are respectively the output of reporting to the police of temperature polling instrument temperature lower bound and often open the output of reporting to the police of dry contact and high limit and often open dry contact.
In the time that electric heater running temperature is spent lower than the temperature lower bound 90 of temperature polling instrument setting, logging temperature lower bound is reported to the police to export and is often opened dry contact closure, in control loop, contactor KM101 control coil obtains electricly, and contactor adhesive conducting, simultaneously to obtaining electric lighting by loop run indicator HL01.When after contactor KM101 adhesive, its normally opened contact closure, because K1-2 is that dry contact is often opened in the high limit warning of temperature polling instrument temperature output, now system temperature is lower than 90 degree, K1-2 contact disconnects, and KA201 pilot relay is in off-state, and its normally closed contact is in conducting state, in contactor adhesive moment, control loop enters self-locking state.Contactor obtains electric in closure state, and in backfeed loop, the closed also feedback signal of its normally opened contact is to long-range DCS system.
When electric heater temperature rise to 90 degree is between 110 degree time, temperature polling instrument temperature lower bound is reported to the police to export and is often opened dry contact K1-1 disconnection, when temperature does not exceed, logging temperature is high prescribes a time limit, relay K A201 normally closed contact is all the time in closure state, in control loop, contactor is still in obtaining electricity condition, the closed also feedback signal of its normally opened contact is to DCS system, and electric heater continues heating operation.
When exceeding temperature setting, electric heater temperature sets high limit 110 while spending, K1-1 is still in off-state, the high limit of temperature polling instrument temperature is reported to the police to export and is often opened dry contact K1-2 because of the adhesive of temperature superelevation limit, now relay K A201 obtains electric, in control loop, KA201 normally closed contact disconnects, in control loop, KM101 dead electricity disconnects, and its normally opened contact disconnects and extremely long-range DCS system of feedback signal, and heating power loop disconnects electric heater and stops heating.
When stopping heating, electric heater makes to be reduced at its temperature at 90 degree between 110 degree time, K1-1 is in off-state, K1-2 is also in off-state, KA201 normally closed contact adhesive in control loop, but contactor KM101 normally opened contact is in off-state, contactor dead electricity in control loop, its normally opened contact disconnects and extremely long-range DCS system of feedback signal, and electric heater is still out of service.
Below electric heater temperature continues to drop to 90 degree time, K1-1 is in closure state, now in control loop, KM101 obtains electric adhesive, K1-2 is in off-state, KA201 normally closed contact adhesive in control loop, in the time of contactor adhesive, its normally opened contact closure makes control loop enter self-locking state, now electric heater operation, system has automatically been moved temperature actuated between the high lower bound numerical value of temperature arranging.
2) under local operation pattern, by the rotation of three rotary switches of panel, during to shelves on the spot, now DCS system does not participate in controlling, and temperature control is due to the control of electric heating control cabinet panel start-stop button.
When pressing lower panel on the spot when start button SB1-1, stop button does not operate its normally closed contact in closure state, and control loop contactor KM101 control coil obtains electric, and the closed and feedback signal of its normally opened contact is to long-range DCS system, electric heater operation.In the time of contactor adhesive, its normally opened contact closure, control system enters self-locking state electric heater continuous heating.
When pressing lower panel on the spot when stop button SB1-2, its normally closed contact disconnects, contactor KM101 dead electricity in control loop, its normally opened contact disconnect and feedback signal to long-range DCS system, electric heater is out of service.
3) under shutdown operation pattern, when three rotary switch rotations of panel are extremely shut down to shelves, control system is in stopped status, and electric heater is out of service.
Claims (6)
1. a fuel-burning power plant electrostatic precipitator electric-heating control system, is characterized in that: mainly comprise electric heating control cabinet, DCS system, on-the-spot electric heater and on-the-spot temperature probe; Described electric heating control cabinet comprises electrical heating power loop, electric heating control loop and electrical heating backfeed loop;
The core that described electric heating control cabinet is system, wherein electrical heating backfeed loop receives DCS system output dry contact signal, simultaneously by electric heating control circuit feedback dry contact signal to DCS system; Electrical heating backfeed loop is connected to on-the-spot temperature probe by shielding cable for measuring temperature, and is connected to on-the-spot electric heater by electrical heating power loop by power cable.
2. electric-heating control system according to claim 1, it is characterized in that: described electrical heating power loop accesses multiple loops through bus-bar, wherein single loop comprises miniature circuit breaker and A.C. contactor element, electrical heating power loop outputting power cable also lays to on-the-spot electric heater, for electric heater provides electrical source of power.
3. electric-heating control system according to claim 1 and 2, is characterized in that: described electric heating control and electrical heating backfeed loop comprise three rotary switches of switch board panel, DCS system output dry contact, panel start button, panel stop botton, temperature polling instrument and major loop A.C. contactor on the spot on the spot.
4. electric-heating control system according to claim 1, is characterized in that: described DCS system is made up of active station processor, controlling processor, Fieldbus Components and industrial power.
5. electric-heating control system according to claim 1, is characterized in that: described on-the-spot electric heater comprises insulator, negative electrode porcelain axle and ash bucket electric heater.
6. electric-heating control system according to claim 1, is characterized in that: described on-the-spot temperature probe comprises that length is the PT100 thermometric platinum resistance of 250mm and 350mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320839544.8U CN203630645U (en) | 2013-12-19 | 2013-12-19 | Electric heating control system of electrostatic precipitator in thermal power plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320839544.8U CN203630645U (en) | 2013-12-19 | 2013-12-19 | Electric heating control system of electrostatic precipitator in thermal power plant |
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| CN203630645U true CN203630645U (en) | 2014-06-04 |
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| CN201320839544.8U Expired - Fee Related CN203630645U (en) | 2013-12-19 | 2013-12-19 | Electric heating control system of electrostatic precipitator in thermal power plant |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108827016A (en) * | 2018-08-31 | 2018-11-16 | 内蒙古通威高纯晶硅有限公司 | A kind of synthetic furnace Heater Control System |
| CN110750121A (en) * | 2019-12-03 | 2020-02-04 | 中北大学 | Overtemperature automatic power-off temperature-controllable heating system for shock tube heating |
-
2013
- 2013-12-19 CN CN201320839544.8U patent/CN203630645U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108827016A (en) * | 2018-08-31 | 2018-11-16 | 内蒙古通威高纯晶硅有限公司 | A kind of synthetic furnace Heater Control System |
| CN110750121A (en) * | 2019-12-03 | 2020-02-04 | 中北大学 | Overtemperature automatic power-off temperature-controllable heating system for shock tube heating |
| CN110750121B (en) * | 2019-12-03 | 2021-08-24 | 中北大学 | Overtemperature automatic power-off temperature-controllable heating system for shock tube heating |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140604 Termination date: 20171219 |