CN203478320U - MFT control equipment - Google Patents
MFT control equipment Download PDFInfo
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- CN203478320U CN203478320U CN201320613698.5U CN201320613698U CN203478320U CN 203478320 U CN203478320 U CN 203478320U CN 201320613698 U CN201320613698 U CN 201320613698U CN 203478320 U CN203478320 U CN 203478320U
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Abstract
The utility model discloses MFT control equipment. The equipment comprises an OR gate, combustion flame loss signals and power loss signals are used as input signals of the OR gate, and the output end of the OR gate is connected with a boiler whole flame loss MFT. According to the MFT control equipment, the whole flame loss MFT main protection control logic can be more reliable, wrong protection movements caused by power abnormity can be avoided, and therefore normal production operation of a power plant can be guaranteed.
Description
Technical field
The utility model relates to power field, particularly, relates to a kind of main burning tripping operation (MFT) control appliance.
Background technology
In thermal power generation unit, general boiler from bottom to top burner grinds layout according to A mill, AB oil gun, B mill, C mill, CD oil gun, D mill, E mill, EF oil gun, F, in every grate firing burner, be furnished with respectively fire inspection sensor, for example be arranged in four jiaos of boiler, in order to monitor the flame combustion situation at each angle of each layer.Flame detecting probe power acquisition designs with redundance type, by the first AC/DC converting circuit 105 by ups power 101(220V alternating voltage) be converted into 24V DC voltage, by the second AC/DC converting circuit 107 by emergency power supply 103(220V alternating voltage) be converted into 24V DC voltage, two-way 24V dc source is flame detecting probe power supply after 109 decoupling zeros of decoupling zero diode, as shown in Figure 1.
In order to monitor flame detecting probe electric power thus supplied, in prior art, utilize 201 pairs of supply voltages of DCS system to monitor, as shown in Figure 2.This logic that realizes can guarantee in generating set running, if flame detecting probe detects abnormal signal (in the situation of flame detecting probe normal operation of sensor), can trigger main protection of boiler MFT action logic, and interlock steam turbine and generator tripping.The defect of prior art is; in the situation that the power supply of flame detecting probe occurs is abnormal; can make flame detecting probe monitor abnormal signal, thereby also can trigger the full fuel of boiler, lose MFT main protection action, but this MFT main protection action not be that generating set is in service desired.
Utility model content
The purpose of this utility model is to provide a kind of MFT control appliance, to prevent, because of the undesired MFT of the causing main protection action of power work, avoiding affecting the normal production operation in power plant.
To achieve these goals, the utility model provides a kind of MFT control appliance, and this equipment comprises or door, combustion flame lose signal and power supply lose signal as or the input signal of door, described or gate output terminal is connected with the full loss of flame MFT of boiler.
Preferably, described combustion flame forfeiture signal comprises A layer combustion flame forfeiture signal, AB layer combustion flame forfeiture signal, B layer combustion flame forfeiture signal, C layer combustion flame forfeiture signal, CD layer combustion flame forfeiture signal, D layer combustion flame forfeiture signal, E layer combustion flame forfeiture signal, EF layer combustion flame forfeiture signal and F layer combustion flame forfeiture signal.
Preferably, this equipment comprises NAND gate, and the first input end that the first power supply is lost signal and described NAND gate is connected, and the second input that second source is lost signal and described NAND gate is connected, and the output signal of described NAND gate is that described power supply is lost signal.
Preferably, described or door comprise first or door and second or, described combustion flame is lost signal as first or the input signal of door, described first or the output signal of door and described power supply lose signal as described second or the input signal of door, described second or the output of door be connected with the full loss of flame MFT of described boiler.
Preferably, the first power supply is connected with flame detecting probe through decoupling zero diode with second source.
Preferably, described the first power supply and the first predetermined voltage are relatively exported described the first power supply and are lost signal, and described second source and the second predetermined voltage are relatively exported second source and lost signal.
Preferably, described power supply is lost signal and is also inputted DCS surveillance, and described DCS surveillance is lost signal according to power supply and confirmed power supply forfeiture alarm.
The utility model provides a kind of MFT control method, and the method comprises: receive combustion flame and lose signal and power supply forfeiture signal; Described combustion flame forfeiture signal and power supply forfeiture signal are done to exclusive disjunction; And utilize the full loss of flame MFT of exclusive disjunction output control boiler.
Preferably, described combustion flame forfeiture signal comprises A layer combustion flame forfeiture signal, AB layer combustion flame forfeiture signal, B layer combustion flame forfeiture signal, C layer combustion flame forfeiture signal, CD layer combustion flame forfeiture signal, D layer combustion flame forfeiture signal, E layer combustion flame forfeiture signal, EF layer combustion flame forfeiture signal and F layer combustion flame forfeiture signal.
Preferably, the method also comprises:
The first power supply is lost to signal and second source to be lost signal and does NAND operation and generate described power supply and lose signal.
Preferably, described combustion flame being lost to signal and power supply loses signal and does exclusive disjunction and comprise: described combustion flame is lost to signal and do the first exclusive disjunction, and the result of this first exclusive disjunction and described power supply forfeiture signal are done to the second exclusive disjunction.
Preferably, described combustion flame is lost signal to be provided by flame detecting probe, and the first power supply and second source are described flame detecting probe power supply through decoupling zero diode.
Preferably, described the first power supply is lost signal and is relatively obtained by described the first power supply and the first predetermined voltage, and described second source is lost signal and relatively obtained by second source and the second predetermined voltage.
Preferably, the method also comprises: described power supply is lost signal input DCS surveillance; And
Described DCS surveillance is lost signal according to power supply and is confirmed power supply forfeiture alarm.
It will be more reliable that the utility model can make full loss of flame MFT main protection control logic, avoid the error protection action that produces because power supply is undesired, thereby can guarantee the normal production operation in power plant.
Other feature and advantage of the present utility model partly in detail are described the specific embodiment subsequently.
Accompanying drawing explanation
Accompanying drawing is to be used to provide further understanding of the present utility model, and forms a part for description, is used from explanation the utility model, but does not form restriction of the present utility model with the specific embodiment one below.In the accompanying drawings:
Fig. 1 is flame detecting probe electric power-feeding structure schematic diagram in prior art;
Fig. 2 is power monitoring structural representation in prior art;
Fig. 3 is the circuit diagram that the generation power supply that provides of the utility model is lost signal;
Fig. 4 is the full loss of flame MFT control logic schematic diagram that the utility model provides;
Fig. 5 is the MFT control method flow chart that the utility model provides.
Description of reference numerals
101 ups power 103 emergency power supplies
105 the one AC/DC converter 107 the 2nd AC/DC converters
109 decoupling zero diode 111 A layer flame detecting probe power supplys
113 AB layer flame detecting probe power supply 115 B layer flame detecting probe power supplys
117 C layer flame detecting probe power supply 119 CD layer flame detecting probe power supplys
121 D layer flame detecting probe power supply 123 E layer flame detecting probe power supplys
125 EF layer flame detecting probe power supply 127 F layer flame detecting probe power supplys
201 DCS surveillance 301 first comparators
303 second comparator 305 NAND gates
307 power supplys are lost signal 401 A layer combustion flame and are lost signal
403 AB layer combustion flame are lost signal 405 B layer combustion flame and are lost signal
407 C layer combustion flame are lost signal 409 CD layer combustion flame and are lost signal
411 D layer combustion flame are lost signal 413 E layer combustion flame and are lost signal
415 EF layer combustion flame are lost signal 417 F layer combustion flame and are lost signal
419 first or door 421 second or door
423 full loss of flame MFT
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is elaborated.Should be understood that, the specific embodiment described herein only, for description and interpretation the utility model, is not limited to the utility model.
In the production operation process in power plant; may there is abnormal situation in power supply; thereby cause flame detecting probe cisco unity malfunction; and in the testing result of all flame detecting probes all in abnormal situation; can cause full loss of flame MFT that protection action occurs, thereby whole production operation is exerted an adverse impact.
In order to address this problem, the utility model provides a kind of MFT control appliance, and this equipment comprises or door, combustion flame lose signal and power supply lose signal as or the input signal of door, described or gate output terminal is connected with the full loss of flame MFT of boiler.According to the principle of data signal, can implement multiple implementation, for example combustion flame being lost to signal and power supply loses in that signal is exported as same many input lists or door, thereby realize the logic OR function of combustion flame being lost to signal and power supply forfeiture signal, also can respectively different signals be carried out to exclusive disjunction, and then the result of exclusive disjunction is carried out to exclusive disjunction again.From data signal in theory, these embodiments can be realized identical arithmetic logic.For combustion flame is lost signal, for the different layout of boiler of different generator factory, can there is different combustion flames to lose signal, for example, can comprise that A layer combustion flame forfeiture signal 401, AB layer combustion flame forfeiture signal 403, B layer combustion flame forfeiture signal 405, C layer combustion flame are lost signal 407, CD layer combustion flame lost signal 409, D layer combustion flame forfeiture signal 411, E layer combustion flame forfeiture signal 143, EF layer combustion flame forfeiture signal 415 and F layer combustion flame and lost signal 417.
In order to obtain power supply, lose signal, Fig. 3 shows a kind of implementation.As shown in Figure 3, for the ease of d. c. voltage signal is carried out to logic judgement, the output voltage of the one AC/DC converter 105 can be inputted the first comparator 301, by the preset voltage with the first comparator 301, for example first power supply that relatively obtains of 21V is lost signal, whether the output voltage that can judge an AC/DC converter 105 according to this first power supply forfeiture signal is lost, at the output voltage of an AC/DC converter 105 during lower than 21V, judge the output voltage forfeiture of an AC/DC converter 105, also the power supply that is flame detecting probe is lost, otherwise the output voltage of judging an AC/DC converter 105 is normal.In like manner, the output voltage of the 2nd AC/DC converter 107 can be inputted the second comparator 303, by the preset voltage with the second comparator 303, for example the second source that relatively can obtain of 21V is lost signal, whether the output voltage that can judge the 2nd AC/DC converter 107 according to this second source forfeiture signal is lost, at the output voltage of the 2nd AC/DC converter 105 during lower than 21V, judge the output voltage forfeiture of the 2nd AC/DC converter 105, also the power supply that is flame detecting probe is lost, otherwise judges that the output voltage of the 2nd AC/DC converter 105 is normal.
In order to consider the output voltage (the first power supply) of an AC/DC converter 105 and the output voltage (second source) of the 2nd AC/DC converter 105 simultaneously; while guaranteeing that the output voltage of an AC/DC converter 105 and the output voltage of the 2nd AC/DC converter 105 are all normal; full flame MFT protection could occur; the first power supply forfeiture signal and second source forfeiture signal need to be carried out to NAND operation; by follow-up exclusive disjunction; when any one power supply is broken down, can there is not protection action in the full loss of flame MFT423 of boiler.
In order correctly to control the full loss of flame MFT423 of boiler, correctly move, several combustion flames are lost signals can input first or door 419, and by first or door 419 exclusive disjunction result be input to second or door 421, simultaneously power supply is lost signal 307 and is also inputted second or door 421, by second or door computing, only can guarantee when the output voltage (the first power supply) of an AC/DC converter 105 and the output voltage (second source) of the 2nd AC/DC converter 105 are all normal, just may there is protection action in the full loss of flame MTF of boiler, for example A layer combustion flame lost signal 401, AB layer combustion flame lost signal 403, B layer combustion flame lost signal 405, C layer combustion flame lost signal 407, CD layer combustion flame lost signal 409, D layer combustion flame lost signal 411, E layer combustion flame lost signal 143, EF layer combustion flame lost signal 415, and F layer combustion flame lost signal 417 all in abnormal situation.
In addition, the output voltage (second source) of the output voltage of an AC/DC converter 105 (the first power supply) and the 2nd AC/DC converter 105 is connected with flame detecting probe through decoupling zero diode 109, thereby can power for flame detecting probe.Described power supply is lost signal and is also inputted DCS surveillance, and described DCS surveillance is lost signal according to power supply and confirmed power supply forfeiture alarm.
Correspondingly, the utility model provides a kind of MFT control method, and the method comprises: receive combustion flame and lose signal and power supply forfeiture signal (step 501); Described combustion flame forfeiture signal and power supply forfeiture signal are done to exclusive disjunction (step 503); And utilize the full loss of flame MFT(of exclusive disjunction output control boiler step 505).Described power supply forfeiture signal can be done NAND operation by the first power supply forfeiture signal and second source forfeiture signal and obtain.Preferably, described combustion flame being lost to signal and power supply loses signal and does exclusive disjunction and comprise: described combustion flame is lost to signal and do the first exclusive disjunction, and the result of this first exclusive disjunction and described power supply forfeiture signal are done to the second exclusive disjunction.
Below describe by reference to the accompanying drawings preferred embodiment of the present utility model in detail; but; the utility model is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.
It should be noted that in addition each the concrete technical characterictic described in the above-mentioned specific embodiment, in reconcilable situation, can combine by any suitable mode.For fear of unnecessary repetition, the utility model is to the explanation no longer separately of various possible combinations.
In addition, between various embodiment of the present utility model, also can be combined, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (7)
1. a MFT control appliance, is characterized in that, this equipment comprises or door, combustion flame lose signal and power supply lose signal as or the input signal of door, described or gate output terminal is connected with the full loss of flame MFT of boiler.
2. equipment according to claim 1, it is characterized in that, described combustion flame is lost signal and is comprised that A layer combustion flame forfeiture signal, AB layer combustion flame forfeiture signal, B layer combustion flame forfeiture signal, C layer combustion flame are lost signal, CD layer combustion flame lost signal, D layer combustion flame forfeiture signal, E layer combustion flame forfeiture signal, EF layer combustion flame forfeiture signal and F layer combustion flame and lost signal.
3. equipment according to claim 1, it is characterized in that, this equipment comprises NAND gate, the first input end that the first power supply is lost signal and described NAND gate is connected, the second input that second source is lost signal and described NAND gate is connected, and the output signal of described NAND gate is that described power supply is lost signal.
4. equipment according to claim 1, it is characterized in that, described or door comprise first or door and second or, described combustion flame is lost signal as first or the input signal of door, described first or the output signal of door and described power supply lose signal as described second or the input signal of door, described second or the output of door be connected with the full loss of flame MFT of described boiler.
5. equipment according to claim 3, is characterized in that, the first power supply is connected with flame detecting probe through decoupling zero diode with second source.
6. equipment according to claim 5, is characterized in that, described the first power supply and the first predetermined voltage are relatively exported described the first power supply and lost signal, and described second source and the second predetermined voltage are relatively exported second source and lost signal.
7. according to the equipment described in claim 1-6 any one, it is characterized in that, described power supply is lost signal and is also inputted DCS surveillance, and described DCS surveillance is lost signal according to power supply and confirmed power supply forfeiture alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320613698.5U CN203478320U (en) | 2013-09-30 | 2013-09-30 | MFT control equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320613698.5U CN203478320U (en) | 2013-09-30 | 2013-09-30 | MFT control equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203478320U true CN203478320U (en) | 2014-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320613698.5U Expired - Lifetime CN203478320U (en) | 2013-09-30 | 2013-09-30 | MFT control equipment |
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| CN (1) | CN203478320U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499958A (en) * | 2013-09-30 | 2014-01-08 | 中国神华能源股份有限公司 | Method and device for controlling MFT (Main Fuel Trip) |
-
2013
- 2013-09-30 CN CN201320613698.5U patent/CN203478320U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499958A (en) * | 2013-09-30 | 2014-01-08 | 中国神华能源股份有限公司 | Method and device for controlling MFT (Main Fuel Trip) |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100011 Beijing Dongcheng District, West Binhe Road, No. 22 Patentee after: China Shenhua Energy Co.,Ltd. Patentee after: National Energy Group Guohua Power Co.,Ltd. Patentee after: Guoneng Hebei Dingzhou Power Generation Co.,Ltd. Address before: 100011 Beijing Dongcheng District, West Binhe Road, No. 22 Patentee before: China Shenhua Energy Co.,Ltd. Patentee before: National Energy Group Guohua Power Co.,Ltd. Patentee before: HEBEI GUOHUA DINGZHOU POWER GENERATION Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP03 | Change of name, title or address |
Address after: 100011 Beijing Dongcheng District, West Binhe Road, No. 22 Patentee after: China Shenhua Energy Co.,Ltd. Patentee after: National Energy Group Guohua Power Co.,Ltd. Patentee after: HEBEI GUOHUA DINGZHOU POWER GENERATION Co.,Ltd. Address before: 100011 Shenhua building, 22 West Binhe Road, Dongcheng District, Beijing Patentee before: China Shenhua Energy Co.,Ltd. Patentee before: BEIJING GUOHUA POWER Co.,Ltd. Patentee before: HEBEI GUOHUA DINGZHOU POWER GENERATION Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140312 |
|
| CX01 | Expiry of patent term |