CN102207291A - Combustion controlling device - Google Patents
Combustion controlling device Download PDFInfo
- Publication number
- CN102207291A CN102207291A CN2011100718649A CN201110071864A CN102207291A CN 102207291 A CN102207291 A CN 102207291A CN 2011100718649 A CN2011100718649 A CN 2011100718649A CN 201110071864 A CN201110071864 A CN 201110071864A CN 102207291 A CN102207291 A CN 102207291A
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- Prior art keywords
- control
- combustion
- safety
- control device
- air
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
- F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2231/00—Fail safe
- F23N2231/10—Fail safe for component failures
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention provides a combustion controlling device capable of more safely controlling combustion. Two controlling devices are disposed, namely a combustion controlling device (4) controlling the combustion of a combustion furnace, and a safety controlling device (5) checking the operation of the devices wherein the operations are controlled by the combustion controlling device. This enables safer control of combustion because if there is a fault in either the combustion controlling device (4) or the safety controlling device (5), a process can be performed by the other device to stop the combustion. Additionally, because the controlling device (4) for controlling the structural elements that control the combustion in the boiler system and the controlling device (5) for operational checks of the outputs from those structural elements are separate, if there is a failure in any of the structural elements or controlling devices, that failure can be detected reliably, enabling safer control of the combustion.
Description
Technical field
The present invention relates to a kind of combustion control device of controlling the burning of combustion furnace.
Background technology
In the past, combustion control device, in order when keeping desirable air-fuel ratio, to control the burning in the combustion furnace, according to the air pressure in the gas flow path, the flow, the temperature in the combustion furnace etc. of air in the air flow circuit, the stop valve of adjustments of gas stream, the flow-control of gas flow path are supplied with air blast, air flow control with air door etc. (for example, with reference to patent documentation 1 with the air of air door, air flow circuit.)。
The prior art document
Patent documentation
Patent documentation 1: the open 2001-235146 communique of Japan Patent
Summary of the invention
The problem that invention will solve
But, all be to control or monitor all of the foundation elements with 1 combustion control device in the past, therefore produce under the unusual situation burn-out safely at this combustion control device self.For example, generally all be with the control of 1 combustion control device or monitor certain controlled device (air blast) and so a plurality of equipment that are associated of sensor device (blast switch) that measured value changes according to the action of controlled device, for example air blast and measure the result's that this air blast moves blast switch etc.For convenience of description, below, describe as an example with air blast and blast switch.In control system as described above, in case combustion control device produces unusually, just can not correctly control air blast, perhaps can not correctly detect the output of blast switch, its possibility of result can cause can not burn-out.
Therefore, the object of the present invention is to provide a kind of combustion control device that can more safely control burning.The means of dealing with problems
In order to solve above-mentioned problem, combustion control device of the present invention is characterized in that, comprising: first control part, and it is to the control signal of the action of this first equipment of first equipment output control of the burning of control combustion furnace; Second control part, its action to first equipment is confirmed, and feasible second equipment that burns and stop of control, described first control part is exported to second control part with control signal, described second control part is exported to first control part with the confirming operation result of first equipment, and first control part and second control part are according to control signal and confirming operation result, confirm that first equipment has when unusual, carries out the processing of burn-out.
In above-mentioned combustion control device, second control part makes burning stop by controlling second equipment.
Again, in above-mentioned combustion control device, first control part makes burning stop by controlling first equipment.
The effect of invention
Adopt the present invention, by two control parts are set, promptly for first control part of the control signal of the action of this first equipment of first equipment output control of the burning of control combustion furnace and second control part that the action of confirming first equipment and second equipment that makes burning stop are controlled, even if control part produces when unusual therein, also can handle so that burn and stop, therefore can more safely control burning by another control part.Therefore because the control part of control first equipment is different with the control part of the confirming operation that carries out first equipment, even if produce under the unusual situation at some equipment or control part, can detects reliably also that this is unusual, so can more safely control burning again.
Description of drawings
Fig. 1 is the figure that schematically shows the formation of combustion furnace of the present invention system.
Fig. 2 is the figure of the starting sequence when being used to regular event is described.
Fig. 3 is used to illustrate the figure that produces Iso starting sequence often.
Fig. 4 is used to illustrate the figure of self-starting to the order of an example that stops to be shown.
Symbol description
The 1--burner, the 2--fuel flow path, the 2a--primary flow path, 2b--first stream, 2c--second stream, the 3--air flow circuit, the 4--combustion control device, the 5--safety control, the 11--jar, the 12--main burner, the 13--pilot flame burner, the 14--ignition transformer, the 15--flame detector, the 16--pump, the 17--temperature sensor, the 21--gas pressure switch, 22--first safety cut-off valve, 23--second safety cut-off valve, 24--the 3rd safety cut-off valve, 25--the 4th safety cut-off valve, the 31--air blast, the 32--blast switch, the 33--air door, the 41--Department of Communication Force, the 42--control part that burns, the 51--Department of Communication Force, 52--safety verification portion.
The specific embodiment
Below, with reference to accompanying drawing example of the present invention is elaborated.In addition, below, the example that is applicable to steam generator system of the system that uses combustion control device of the present invention is described.
The formation of＜steam generator system 〉
As shown in Figure 1, the steam generator system of this example has: the air flow circuit 3, combustion control device 4 and the safety control 5 that generate the burner 1 of warm water in jar 11, this burner 1 is supplied with the fuel flow path 2 of fuel, the main burner 12 of burner 1 is supplied with from the air of air blast 31.
One end of air flow circuit 3 is connected with air blast 31, and the other end is connected with the first stream 2b, and the air of discharging from air blast 31 is provided for main burner 12 by the first stream 2b with fuel.On such air flow circuit 3, be provided with blast switch 32 and air door 33.
Combustion control device 4 is made of the circuit of PLC (programmable logic controller (PLC)) etc., and it is controlled the inscape that pump 16, air blast 31 and air door 33 etc. are used to control the burning of burner 1.Such combustion control device 4 has Department of Communication Force 41 and burning control part 42.
Here, Department of Communication Force 41 is imported each testing results from temperature sensor 17, and to pump 16, air blast 31 and air door 33 output control signals.Again, 41 pairs of safety controls of Department of Communication Force, 5 its control signals of output, and from safety control 5 inputs control signal described later, testing result.
Again, 42 pairs of exercises that contain the steam generator system of combustion order described later of burning control part are controlled.Specifically, according to the testing result of temperature sensor 17, from various information of safety control 5 etc., generate control signals with respect to air blast 31, air door 33 and safety control 5, thus to the starting of main burner 12 and stop, the exercises of the steam generator systems such as output adjustment of main burner 12 carry out sequential control.
Safety control 5 is made of the circuit of burner control module, interlocking module etc., and the action of the inscape that combustion control device 4 is controlled is confirmed.Here, interlocking module be meant according to the control signal of coming spontaneous combustion control part 42 to the starting of burner control module indication main burner 12 and stop, the order of the output adjustment of main burner 12 etc., and according to the situation of confirming burning from the signal of flame detector 15, when the unexpected state of affairs such as imperfect combustion takes place, play and stop fuel and supply with and guarantee safe effect.Again, burner control module basis is carried out the igniting of pilot flame burner 13 from the indication of interlocking module, thereby carries out the igniting of main burner 12.Though diagram not also can constitute a plurality of main burners 12 and corresponding with it a plurality of burner control module are set, and a plurality of burner control modules etc. are controlled with single interlocking module again.Such safety control 5 has Department of Communication Force 51 and safety verification portion 52.
Here, Department of Communication Force 51 input is respectively from the testing result of flame detector 15, gas pressure switch 21 and blast switch 32 and from the control signal of combustion control device 4, and to ignition transformer 14 and first～the 4th safety cut-off valve 22～25 output control signals.Again, 51 pairs of combustion control devices of Department of Communication Force, 4 its control signals of output, testing result, and from the above-mentioned control signal of combustion control device 4 inputs.
Again, can the control signal that safety verification portion 52 is generated according to the testing result and the combustion control device 4 of flame detector 15, gas pressure switch 21 and blast switch 32 be carried out safely the exercises of the combustion control device 4 in 1 above stage in each stage that constitutes combustion order described later and to confirm.Confirming under the situation about can carry out safely that safety verification portion 52 permits combustion control device 4 and launches various combustion event, such as making its processing that is equivalent to next stage etc.On the other hand, confirming that safety verification portion 52 makes combustion control device 4 stop various combustion event under the situation about can not carry out safely, for example making it no longer carry out next one processing etc.
＜starting sequence 〉
Next, with reference to Fig. 2, Fig. 3, the combustion order of combustion control device 4 is described.Below, so that the starting sequence during start describes as an example.This starting sequence is made of a plurality of processing, but explanation here is to handle 2 o'clock situation from initial processing 1 to next.
When making start, carry out following action as handling 1.At first, 5 outputs of 42 pairs of safety controls of the burning control part of combustion control device 4 are intended to make the control signal of start.
During from the control signal of the starting of combustion control device 4 input expression steam generator systems, the safety verification portion 52 of safety control 5 confirms whether the signal from blast switch 32 is the state of OFF, should confirm that the result exported to combustion control device 4.
In this stage, burning control part 42 control signal that 31 output indications do not drive to air blast.Therefore, under the situation of combustion control device 4, safety control 5, air blast 31 and blast switch 32 regular events, because air blast 31 stops, air flow circuit 3 inside are not supplied to air, and the blast switch 32 that therefore is located at this air flow circuit 3 should be the OFF state.But during some generation fault in combustion control device 4, safety control 5, air blast 31 and the blast switch 32, the signal of blast switch 32 becomes ON or confirms that the result is exported to combustion control device 4.For example, as shown in Figure 3, produce fault at combustion control device 4, when the control signal that drives was indicated in 31 outputs to air blast, the signal of blast switch 32 became ON.
When the control signal of the starting of expression steam generator system was not ON from combustion control device 4 input and from the signal of blast switch 32, it is unusual that safety verification portion 52 is judged as some generations of combustion control device 4, air blast 31 and blast switch 32.And safety verification portion 52 output does not make ignition transformer 14 startings, and keeps the control signal that burning is stopped of being used to of first～the 4th safety cut-off valve, 22～25 closing state etc.
When the affirmation result of blast switch 32 is not input to combustion control device 4 or to have imported the signal that illustrates from blast switch 32 be that the affirmation of ON is as a result the time, burning control part 42 is judged as safety control 5 and produces unusually, and output is used to close the control signal that air door 33 grades stop burning.
Thus, steam generator system does not carry out combustion event, and it is dangerous to prevent that therefore steam generator system from producing.
On the other hand, after the control signal of having exported the starting that steam generator system is shown, the signal that blast switch 32 is shown when input is the affirmation of OFF as a result the time, the control signal that the 31 output indications of 42 pairs of air blasts of burning control part drive, and this control signal exported to safety control 5.
When combustion control device 4 input illustrated the control signal of driving of air blast 31, the safety verification portion 52 of safety control 5 confirmed whether the signal from blast switch 32 is the state of ON, should confirm that the result exported to combustion control device 4.
In this stage, under the situation of combustion control device 4, safety control 5, air blast 31 and blast switch 32 regular events, because air blast 31 drives, air flow circuit 3 inside are supplied to air, and the blast switch 32 that therefore is located at this air flow circuit 3 should be the ON state.But when the some generation fault in these inscapes, the affirmation result who becomes OFF or blast switch 32 from the signal of blast switch 32 is not input to combustion control device 4.
No matter whether the control signal of the driving of air blast 31 is shown imports from combustion control device 4, when the signal from blast switch 32 was OFF, it is unusual that safety verification portion 52 is judged as some generations of combustion control device 4, air blast 31 and blast switch 32.And safety verification portion 52 output does not make ignition transformer 14 startings, and keeps the control signal that burning is stopped of being used to of first～the 4th safety cut-off valve, 22～25 closing state etc.
When the affirmation result of blast switch 32 is not input to combustion control device 4 or to have imported the signal that illustrates from blast switch 32 be that the affirmation of OFF is as a result the time, burning control part 42 is judged as safety control 5 and produces unusually, and output is used to close the control signal that air door 33 grades stop burning.
Thus, steam generator system does not carry out combustion event, and it is dangerous to prevent that therefore steam generator system from producing.
When the signal of confirming blast switch 32 was the demonstration of ON, the next one that the burning control part 42 of combustion control device 4 enters in the starting sequence of steam generator system handled 2.
As described above, according to this example, owing to be provided with two control device, i.e. combustion control device 4 and the safety control 5 that the burning of combustion furnace is controlled to being confirmed by the action of the equipment of these combustion control device 4 control actions, even if therefore in combustion control device 4 and the safety control 5 produces unusual, since can be used for the processing of burn-out by another device, therefore can safer control burning.Again, because the control device (safety control 5) of the control device (combustion control device 4) of the inscape that control is controlled the burning of steam generator system and the confirming operation of the output that comes from this inscape is different, therefore even if produce when unusual at certain inscape or control device, can detect reliably also that this is unusual, therefore can more safely control burning.
In addition, in this example, be with air blast 31 with confirm to confirm that the situation of unusual generation is that example is illustrated between the inscape relevant from the blast switch 32 of the output of this air blast 31, but carry out the object of this affirmation so long as come between the relevant inscape of the inscape of output of action of this inscape with inscape of carrying out certain action and affirmation and to get final product, be not limited to air blast 31 and blast switch 32, can be between each each inscape of being comprised of order the object of free setting check suitably, for example at air door 33 with detect between the sensor of position of air door 33 and confirm unusual generation etc.Therefore, with reference to Fig. 4, under the regular event situation from start to stopping till the whole circumstances of order describe.
When making start, as mentioned above, at first, 5 outputs of 4 pairs of safety controls of combustion control device are intended to make the control signal (step S1) of start.When input made the control signal of this start, 5 pairs of signals from blast switch 32 of safety control were confirmed (step S2).When affirmation was OFF from the signal of blast switch 32,4 outputs of 5 pairs of combustion control devices of safety control illustrated blast switch 32 and are the control signal (step S3) of OFF state.When input expression blast switch 32 was the control signal of OFF state, 31 outputs of 4 pairs of air blasts of combustion control device were used to make the control signal (step S4) of air blast 31 drivings.
Indicate the control signal blower 31 (step S5) of the driving of air blast 31 by input, when detecting air and flow in air flow circuit 3 by blast switch 32 thus (step S6), 4 outputs of 5 pairs of combustion control devices of safety control illustrate the control signal (step S7) that air flows at this air flow circuit 3.
When input illustrated the control signal that air flows in air flow circuit 3,33 outputs of 4 pairs of air doors of combustion control device were intended to air door 33 is made as the control signal (step S8) of full-gear.Be provided with Lo limit switch and Hi limit switch at air door 33 here.
Before input indication air door 33 was the control signal of full-gear, air door 33 was a closed condition always.Therefore, the Lo limit switch that detects air door 33 and whether be closed condition was the ON state before this control signal of output, and promptly air door 33 is closed condition (step S9).
When the control signal of input indication full-gear, air door 33 is set as full-gear (step S10) with air door.Thus, the Hi limit switch that detects air door 33 and whether be full-gear becomes the ON state, and promptly air door 33 is full-gear (step S11).At this moment, because air door 33 is a full-gear, so the Lo limit switch is the OFF state.
When affirmation air door 33 is full-gear (step S12), safety control 5 is kept the stipulated time (prepurge time) (step S13) in order to keep prepurge (プ レ パ one ジ) with the driving of air blast 31 and the full-gear of air door 33.During through this stipulated time, 4 outputs of 5 pairs of combustion control devices of safety control illustrate the control signal (step S14) of having passed through the stipulated time.
When input illustrated the control signal of having passed through the stipulated time, 33 outputs of 4 pairs of air doors of combustion control device were intended to air door 33 is made as the control signal (step S15) of closed condition.
When the control signal of input indication closed condition, air door 33 is set as closed condition with air door.When air door 33 became closed condition, the Hi limit switch became the OFF state, and the Lo limit switch becomes ON state (step S16).
When affirmation Lo limit switch is the ON state (step S17), safety control 5 outputs make the 3rd, the 4th safety cut-off valve 24,25 be the control signal of open mode (step S18), and output makes the control signal (step S19) of ignition transformer 14 drivings.
Three, the 4th safety cut-off valve 24,25 becomes open mode (step S20), confirm gas just in fuel flow path 2 mobile (step S21) by gas pressure switch 21, and when confirming that by flame detector 15 pilot flame burner 13 has been lighted a fire (step S22), the control signal (step S23) that safety control 5 outputs stop ignition transformer 14.When importing this control signal, ignition transformer 14 stops to drive.
Again, when the control signal that pilot flame burner 13 lighted a fire is shown from safety control 5 input (step S24), 5 outputs of 4 pairs of safety controls of combustion control device are intended to the control signal (step S25) to main burner 12 igniting.Like this, safety control 5 outputs are intended to make first, second safety cut-off valve 22,23 to be the control signal of open mode (step S26).First, second safety cut-off valve 22,23 becomes open mode (step S27), when confirming that by flame detector 15 main burner 12 has been lighted a fire, safety control 5 outputs are intended to make the 3rd, the 4th safety cut-off valve 24,25 to be the control signal of closed condition (step S28), make the 3rd, the 4th safety cut-off valve 24,25 be closed condition.By such processing, steam generator system is driven.
Under the state that steam generator system drives like this, when this steam generator system is stopped, during from control signal that combustion control device 4 input indication steam generator systems stop (step S30), safety control 5 outputs are intended to make first, second safety cut-off valve 22,23 to be the control signal of closed condition (step S31), thereby make first, second safety cut-off valve 22,23 be closed condition.Thus, confirming that by gas pressure switch 21 gas does not flow (step S21) in fuel flow path 2, when confirming that by flame detector 15 main burner 12 has been put out a fire, safety control 5 stops to drive.
In such order from start to stopping, can confirm to confirm unusual generation between the relevant inscape of the inscape confirmed with the inscape of carrying out some action with to the output of the action that comes from this inscape, for example, confirming unusual generation between Lo limit switch and Hi limit switch and the air door 33, between ignition transformer 14 and the flame detector 15, between first～the 4th safety cut-off valve 22～25 and the gas pressure switch etc.
Utilizability on the industry
The present invention can be applicable to the combustion control device that the burning of the employed burning stoves such as steam generator system is controlled.
Claims (3)
1. a combustion control device is characterized in that, comprising:
First control part, it is to the control signal of the action of this first equipment of first equipment output control of the burning of control combustion furnace;
Second control part, its action to described first equipment confirm, and control makes second equipment that described burning stops,
Described first control part is exported to described second control part with described control signal,
Described second control part is exported to described first control part with the confirming operation result of described first equipment,
Described first control part and described second control part according to described control signal and described confirming operation result, confirm that described first equipment has when unusual, stops the processing of described burning.
2. combustion control device as claimed in claim 1 is characterized in that, described second control part makes described burning stop by controlling described second equipment.
3. combustion control device as claimed in claim 1 or 2 is characterized in that, described first control part makes described burning stop by controlling described first equipment.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010079498A JP2011208921A (en) | 2010-03-30 | 2010-03-30 | Combustion control device |
| JP2010-079498 | 2010-03-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102207291A true CN102207291A (en) | 2011-10-05 |
Family
ID=44202853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100718649A Pending CN102207291A (en) | 2010-03-30 | 2011-03-16 | Combustion controlling device |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20110244407A1 (en) |
| EP (1) | EP2372247A3 (en) |
| JP (1) | JP2011208921A (en) |
| CN (1) | CN102207291A (en) |
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| CN107023853A (en) * | 2016-02-01 | 2017-08-08 | 阿自倍尔株式会社 | Combustion system |
| CN107238104A (en) * | 2016-03-28 | 2017-10-10 | 阿自倍尔株式会社 | Combustion control system |
| CN107238099A (en) * | 2016-03-28 | 2017-10-10 | 阿自倍尔株式会社 | Combustion control system |
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| JP6518830B1 (en) * | 2018-08-31 | 2019-05-22 | Ｐｒｉｍｅｔａｌｓ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｊａｐａｎ株式会社 | Control device for combustion equipment, combustion equipment system provided with the same, and operation method of combustion equipment |
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| CN107238104A (en) * | 2016-03-28 | 2017-10-10 | 阿自倍尔株式会社 | Combustion control system |
| CN107238099A (en) * | 2016-03-28 | 2017-10-10 | 阿自倍尔株式会社 | Combustion control system |
| CN107238104B (en) * | 2016-03-28 | 2019-07-23 | 阿自倍尔株式会社 | Combustion control system |
| CN107238099B (en) * | 2016-03-28 | 2019-08-23 | 阿自倍尔株式会社 | Combustion control system |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2372247A2 (en) | 2011-10-05 |
| US20110244407A1 (en) | 2011-10-06 |
| EP2372247A3 (en) | 2014-03-12 |
| JP2011208921A (en) | 2011-10-20 |
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