CN106678787B - Banking fire guard method and system - Google Patents
Banking fire guard method and system Download PDFInfo
- Publication number
- CN106678787B CN106678787B CN201710068903.7A CN201710068903A CN106678787B CN 106678787 B CN106678787 B CN 106678787B CN 201710068903 A CN201710068903 A CN 201710068903A CN 106678787 B CN106678787 B CN 106678787B
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- standpipe
- material returning
- default
- value
- returning valve
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/28—Control devices specially adapted for fluidised bed, combustion apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2206/00—Fluidised bed combustion
- F23C2206/10—Circulating fluidised bed
Abstract
The present invention provides a kind of banking fire guard method and systems; applied to circulating fluidized bed boiler; the circulating fluidized bed boiler includes combustion chamber, blower, multiple material returning valve standpipes and feeder; each corresponding material returning valve standpipe of the feeder, which comprises obtain the chamber pressure value of the combustion chamber and the standpipe pressure value of each material returning valve standpipe；When detecting that the chamber pressure value is less than a default chamber pressure threshold value; and the standpipe pressure value of any one of material returning valve standpipe is more than when presetting standpipe pressure threshold value; protection stop signal is sent to the blower and all feeders, to carry out banking fire protection to the circulating fluidized bed boiler.In this way, promptly automatic trigger banking fire can protect when material returning valve feed back is unsmooth, greatly reducing circulating fluidized bed boiler because of material returning valve blocking leads to the probability stopped transport.
Description
Technical field
The present invention relates to Sector of Cfb Boilers, in particular to a kind of banking fire guard method and system.
Background technique
Technology of Circulating Fluidized Bed Boiler is the high-efficiency low-pollution Clean Coal Power Generating Technologies rapidly developed in recent ten years,
This technology the fields such as utilizes to have obtained extensive commercial application in station boiler, Industrial Boiler and offal treatment, has coal
Kind of wide adaptability, the advantages that high combustion efficiency, pollutant emission is low, load regulation range is big and ash comprehensive utilization.Wherein, it returns
Material valve is the critical component of circulating fluidized bed boiler circulation loop, and the stabilization of operation directly affects the safe operation of unit.It returns
The blocking of material valve will lead to shutdown of boiler, therefore need to carry out banking fire protection to boiler when finding that material returning valve returning charge is unsmooth, to prevent
Non-return material valve plug plug.
It is manual when material returning valve returning charge is unsmooth by operator on duty's artificial judgment in the banking fire protection operation of the prior art
Start banking fire protection.The prior art relies on artificial judgment, will lead to and finds that material returning valve returns not in time in operator on duty's work carelessness
When expecting unsmooth or manual operation lag, triggering banking fire protection causes material returning valve to block coking not in time, makes shutdown of boiler, causes
Weight huge economic loss.
Summary of the invention
In order to overcome above-mentioned deficiency in the prior art, the purpose of the present invention is to provide a kind of banking fire guard methods, answer
For circulating fluidized bed boiler, the circulating fluidized bed boiler includes combustion chamber, blower, multiple material returning valve standpipes and feeder,
Each corresponding material returning valve standpipe of the feeder, which comprises
Obtain the chamber pressure value of the combustion chamber and the standpipe pressure value of each material returning valve standpipe；
When detecting that the chamber pressure value is less than a default chamber pressure threshold value, and any one of feed back
When the standpipe pressure value of valve standpipe is more than default standpipe pressure threshold value, protection is sent to the blower and all feeders and is stopped
Stop signal, to carry out banking fire protection to the circulating fluidized bed boiler.
Further, in the above-mentioned methods, the standpipe pressure value of the material returning valve standpipe includes the material returning valve standpipe
High charge level pressure value and middle material position pressure value；The default standpipe pressure threshold value includes material position in high charge level pressure threshold and first
Pressure threshold；
It is described to detect that the chamber pressure value is less than a default chamber pressure threshold value and any one of
When the standpipe pressure value of material returning valve standpipe is more than default standpipe pressure threshold value, sends and protect to the blower and all feeders
The step of protecting stop signal, comprising:
When detect any one of material returning valve standpipe high charge level pressure value be greater than the high charge level pressure threshold, and
When material position pressure value is greater than material position pressure threshold in described first in the first of the material returning valve standpipe, standpipe high-voltage signal is generated；
When detecting that the chamber pressure value is less than the default chamber pressure threshold value, chamber pressure is generated
Normal signal；
According to the standpipe high-voltage signal and the chamber pressure normal signal, to the blower and all described coal is given
Machine sends protection stop signal.
Further, in the above-mentioned methods, described to detect that the chamber pressure value is less than the default burning
When chamber pressure force threshold, generate chamber pressure normal signal the step of, comprising:
It is more than default when the time that the chamber pressure value detected is less than the default chamber pressure threshold value
When combustion chamber draft duration, chamber pressure normal signal is generated.
Further, in the above-mentioned methods, described normally to be believed according to the standpipe high-voltage signal and the chamber pressure
Number, the mode of protection stop signal is sent to the blower and all feeders, comprising:
It is protected when the standpipe high-voltage signal and the chamber pressure normal signal that obtain simultaneously continue a default banking fire
When shield acts duration, protection stop signal is sent to the blower and all feeders.
Further, in the above-mentioned methods, described normally to be believed according to the standpipe high-voltage signal and the chamber pressure
Number, the mode of protection stop signal is sent to the blower and all feeders, comprising:
Obtain banking fire protection investment signal；
When the banking fire protection investment signal, the standpipe high-voltage signal and the chamber pressure that obtain simultaneously are normal
When signal continues a default banking fire protection act duration, protection stop signal is sent to the blower and all feeders.
Further, in the above-mentioned methods, the mode of the chamber pressure value is obtained, comprising:
Obtain the pressure value of the multiple sampled points in combustion chamber top；
Using the average pressure value of the multiple sampled point as the chamber pressure value.
Further, in the above-mentioned methods, the blower includes primary air fan and secondary air fan；The protection stops letter
Number, comprising:
The halt instruction sent to the primary air fan；
The opening value clear instruction sent to the secondary air fan, and
The halt instruction sent to the feeder.
Further, in the above-mentioned methods, the method also includes:
When the middle material position pressure value for detecting any one of material returning valve standpipe is more than the second default standpipe pressure threshold value
Time when being more than a default shunt tripping feeder movement duration, sent to feeder corresponding with the material returning valve standpipe and stop referring to
It enables.
Another object of the present invention is to provide a kind of banking fires to protect system, is applied to circulating fluidized bed boiler, recycle stream
Fluidized bed boiler includes combustion chamber, blower, multiple material returning valve standpipes and feeder, the system comprises:
Pressure detecting assembly, for obtaining the standpipe pressure of the chamber pressure value and each material returning valve standpipe
Value；
Logic control component detects that the chamber pressure value is less than a default chamber pressure threshold value for working as,
And the standpipe pressure value of any one of material returning valve standpipe is more than when presetting standpipe pressure threshold value, to the blower and all institutes
It states feeder and sends protection stop signal, to carry out banking fire protection to the circulating fluidized bed boiler.
Further, in above system, the logic control component, which is also used to work as, detects any one of feed back
The middle material position pressure value of valve standpipe is more than when the time of the second default standpipe pressure threshold value being more than default shunt tripping feeder movement
When long, halt instruction is sent to feeder corresponding with the material returning valve standpipe.
In terms of existing technologies, the invention has the following advantages:
Banking fire guard method provided by the invention and system, material returning valve standpipe and combustion in used acquisition circulating fluidized bed boiler
Chamber pressure force value is burnt, is carried out judging automatic trigger starting banking fire protection according to the material returning valve standpipe and chamber pressure value.In this way,
It promptly automatic trigger banking fire can be protected when material returning valve feed back is unsmooth, greatly reduce circulating fluidized bed boiler because of material returning valve
It blocks and leads to the probability stopped transport.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the schematic diagram of circulating fluidized bed boiler provided in an embodiment of the present invention；
Fig. 2 is one of the flow diagram of banking fire guard method provided in an embodiment of the present invention；
Fig. 3 is the flow diagram of step S120 sub-step shown in Fig. 2；
Fig. 4 is one of banking fire guard method logic control schematic diagram provided in an embodiment of the present invention；
Fig. 5 is the two of banking fire guard method logic control schematic diagram provided in an embodiment of the present invention；
Fig. 6 is one of the flow diagram of banking fire guard method provided in an embodiment of the present invention；
Fig. 7 is the three of banking fire guard method logic control schematic diagram provided in an embodiment of the present invention.
Icon: 10- circulating fluidized bed boiler；The combustion chamber 110-；120- material returning valve standpipe；130- material returning valve；140- blower；
141- primary air fan；142- secondary air fan；150- feeder.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, or be somebody's turn to do
Invention product using when the orientation or positional relationship usually put, be merely for convenience of description of the present invention and simplification of the description, without
It is that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore not
It can be interpreted as limitation of the present invention.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and cannot manage
Solution is indication or suggestion relative importance.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
Fig. 1 is please referred to, circulating fluidized bed boiler 10 includes combustion chamber 110, blower 140, multiple material returning valves 130, material returning valve
Standpipe 120 and feeder 150, wherein each corresponding material returning valve standpipe 120 of the feeder 150, the blower 140
Including primary air fan 141 and secondary air fan 142.The circulating fluidized bed boiler 10 is formed in the interior thereof a fuel when working
Circulation.
It, can be vertical according to material returning valve when circulating fluidized bed boiler 10 works through inventor's numerous studies and practice discovery
The pressure value of pipe 120 and the pressure value of combustion chamber 110 judge the material returning valve 130, and whether returning charge is unsmooth.For example, working as the burning
When the pressure of room 110 is normal, and when 130 returning charge of the material returning valve is unsmooth, returning charge passes through the low rates of material returning valve 130, can lead
Cause the pressure rise in material returning valve standpipe 120.
Therefore in the present embodiment, come by the pressure of detection material returning valve standpipe 120 and combustion chamber 110 as judgment basis
Carry out the triggering control of banking fire protection.A kind of banking fire protection system is present embodiments provided to the material returning valve standpipe 120 and combustion
The pressure for burning room 110 is detected, and controls the working condition of feeder 150 and blower 140 according to testing result, to reach touching
Send out the effect of banking fire protection.
Specifically, the banking fire protection system includes for detecting the combustion chamber 110 and each material returning valve standpipe
The pressure detecting assembly of 120 pressure values, and the logic control component judged and control according to testing result.
Referring to figure 2., Fig. 2 is the flow diagram that a kind of banking fire guard method of system is protected applied to the banking fire,
It the described method comprises the following steps.
Step S110 obtains the chamber pressure value of the combustion chamber 110 and the standpipe of each material returning valve standpipe 120
Pressure value.
Specifically, in the present embodiment, the standpipe pressure value of the material returning valve standpipe 120 includes the material returning valve standpipe
Material position pressure value in 120 high charge level pressure value and first.
The pressure detecting assembly includes the high charge level pressure sensing cell for detecting the high charge level pressure value, is used for
Detect the middle material position pressure sensing cell of the middle material position pressure value, and the burning chamber pressure for detecting the chamber pressure value
Power detection unit.
Wherein, the chamber pressure detection unit includes multiple sampled points.In the present embodiment, it is obtained from multiple sampled points
Remove peak and minimum in the pressure Value Data taken, using the average value of residual compression Value Data as the chamber pressure
Value.Such as, when the chamber pressure detection unit includes 3 sampled points, remove wherein peak and after minimum removes, it will
Remaining 1 value is used as the chamber pressure value；When the chamber pressure detection unit includes 5 sampled points, remove
After wherein peak and minimum remove, using the average value of remaining 3 values as the chamber pressure value.
Step S120, when detecting that the chamber pressure value is less than a default chamber pressure threshold value, and it is any one
When the standpipe pressure value of a material returning valve standpipe 120 is more than default standpipe pressure threshold value, to the blower 140 and all described
Feeder 150 sends protection stop signal, to carry out banking fire protection to the circulating fluidized bed boiler 10.
In the present embodiment, the logic control component carries out banking fire guarantor according to the data that the pressure detecting assembly obtains
The judgement control of shield triggering.Wherein, the default standpipe pressure threshold value includes material position pressure in high charge level pressure threshold and first
Threshold value.
Specifically, referring to figure 3., step S120 may include sub-step S121, S122 and S123.
Sub-step S121, when the high charge level pressure value for detecting any one of material returning valve standpipe 120 is greater than the height
Material position pressure threshold, and in the first of the material returning valve standpipe 120 material position pressure value be greater than described first in material position pressure threshold when,
Generate standpipe high-voltage signal.
Referring to figure 4., Fig. 4 is the logic control schematic diagram that the logic control component is judged.The logic control
Component obtains the pressure value that each pressure detecting assembly obtains, and is detecting any one of material returning valve standpipe 120
High charge level pressure value is greater than the high charge level pressure threshold, and material position pressure value is greater than institute in the first of the material returning valve standpipe 120
When stating material position pressure threshold in first, standpipe high-voltage signal is generated.Wherein, in the present embodiment, the high charge level pressure threshold
It can be set to 0KPa, material position pressure threshold can be set to 1.5KPa in described first.
Sub-step S122 is raw when detecting that the chamber pressure value is less than the default chamber pressure threshold value
At chamber pressure normal signal.
Specifically, referring once again to Fig. 4, the data that the chamber pressure detection unit obtains in order to prevent are instantaneously unstable
The false triggering that timing causes banking fire to protect designs the logic control component in the burning detected in the present embodiment
When the time that chamber pressure force value is less than the default chamber pressure threshold value is more than default combustion chamber draft duration, burning chamber pressure is generated
Power normal signal.Wherein, in the present embodiment, the default chamber pressure threshold value can be set to 400Pa, the default furnace
Thorax negative pressure duration can be set to 3s.
Sub-step S123, according to the standpipe high-voltage signal and the chamber pressure normal signal, to the blower 140
And all feeders 150 send protection stop signal.
Specifically, referring once again to Fig. 4, when the logic control component while the standpipe high-voltage signal obtained and institute
When stating chamber pressure normal signal and continuing a default banking fire protection act duration, to the blower 140 and all described coal is given
Machine 150 sends protection stop signal.Wherein, in this implementation column, the default banking fire protection act duration can be set to 3s.
In this way, can transient data unstable bring interference when further pressure release Value Data is collected.
In the present embodiment, the stopping protection signal is the pulse signal for being 3s the duration, and the protection stops letter
It number include the halt instruction sent to the primary air fan 141, the opening value clear instruction sent to the secondary air fan 142,
And the halt instruction sent to the feeder 150.
Based on above-mentioned design, banking fire guard method provided in this embodiment is detecting that the standpipe pressure value is super
Cross preset range and chamber pressure value when being less than preset range, automatic trigger banking fire protection stops the First air
Machine 141, and by the liquid idol opening value zero setting of secondary air fan 142, stop fuel entering material returning valve standpipe 120.Be simultaneously stopped with
The operation of the corresponding feeder 150 of material returning valve standpipe 120 prevents fuel from continuously adding.With this, make the recirculating fluidized bed pot
Furnace 10 enters banking fire state.
Further, referring to figure 5., the logic control component also obtains banking fire protection investment signal.
When the banking fire protection investment signal, the standpipe high-voltage signal and the chamber pressure that obtain simultaneously are normal
When signal continues a default banking fire protection act duration, protection is sent to the blower 140 and all feeders 150 and is stopped
Signal.In this way, can control the function that just starting banking fire is protected when banking fire investment signal is effective.
Further, in order to prevent because the feeder 150 be added excessive fuel when caused by material returning valve 130 blocking triggering
Banking fire protection, in the present embodiment, please refers to Fig. 6, the method can also include step S130.
Step S130, when the middle material position pressure value for detecting any one of material returning valve standpipe 120 is more than to expect in second
When the time of position pressure threshold is more than a default shunt tripping feeder movement duration, coal is given to corresponding with the material returning valve standpipe 120
Machine 150 is sent to halt instruction.
Specifically, Fig. 7 is please referred to, the logic control component is in the middle material position pressure for detecting the material returning valve standpipe 120
Force value starts timing when being more than material position pressure threshold in described second, when the middle material position pressure value is more than material position in described second
When the duration of pressure threshold is more than a default shunt tripping feeder movement duration, halt instruction is sent to feeder 150.Wherein, exist
In the present embodiment, material position pressure threshold can be set to 1.5KPa in described second, and the default shunt tripping feeder acts duration
It can be set to 20s.
Based on above-mentioned design, when pressure value increases in the material returning valve standpipe 120, but when 110 pressure of combustion chamber is normal,
Excessive fuel is added in the feeder 150 that may be considered the material returning valve standpipe 120, stops feeder 150 at this time and works, reduces combustion
Material is added, to prevent because excessive banking fire protection triggering caused by hindering the flowing of 130 internal return of material returning valve is added in fuel.
In conclusion banking fire guard method provided by the invention and system, returned in used acquisition circulating fluidized bed boiler 10
Expect valve standpipe 120 and chamber pressure value, judgement automatic trigger is carried out according to the material returning valve standpipe 120 and chamber pressure value
Start banking fire protection.In this way, promptly automatic trigger banking fire can be protected when 130 feed back of material returning valve is unsmooth, greatly reduce
Circulating fluidized bed boiler 10 leads to the probability stopped transport because material returning valve 130 blocks.It can also be according to the pressure of material returning valve standpipe 120
Value controls feeder 150, causes the blocking triggering banking fire of material returning valve 130 to be protected to prevent feeder 150 that excessive fuel is added
Shield.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.It should also be noted that similar label and letter exist
Similar terms are indicated in following attached drawing, therefore, once being defined in a certain Xiang Yi attached drawing, are then not required in subsequent attached drawing
It is further defined and explained.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. a kind of banking fire guard method is applied to circulating fluidized bed boiler, the circulating fluidized bed boiler includes combustion chamber, wind
Machine, multiple material returning valve standpipes and feeder, each corresponding material returning valve standpipe of the feeder, which is characterized in that described
It further includes pressure detecting assembly and logic control component that system is protected in banking fire；The described method includes:
The chamber pressure value of the combustion chamber and standing for each material returning valve standpipe are obtained by the pressure detecting assembly
Pipe pressure value；
Detecting that the chamber pressure value is less than a default chamber pressure threshold value by the logic control component, and
When the standpipe pressure value of any one of material returning valve standpipe is more than default standpipe pressure threshold value, to the blower and all described
Feeder sends protection stop signal, to carry out banking fire protection to the circulating fluidized bed boiler；
Wherein, the standpipe pressure value of the material returning valve standpipe includes the high charge level pressure value and middle material position pressure of the material returning valve standpipe
Force value；The default standpipe pressure threshold value includes material position pressure threshold in high charge level pressure threshold and first；
It is described to detect that the chamber pressure value is less than a default chamber pressure threshold value, and any one of feed back
When the standpipe pressure value of valve standpipe is more than default standpipe pressure threshold value, protection is sent to the blower and all feeders and is stopped
The step of stop signal, comprising:
When the high charge level pressure value for detecting any one of material returning valve standpipe is greater than the high charge level pressure threshold, and this time
When expecting that material position pressure value is greater than material position pressure threshold in described first in the first of valve standpipe, standpipe high-voltage signal is generated；
When detecting that the chamber pressure value is less than the default chamber pressure threshold value, it is normal to generate chamber pressure
Signal；
According to the standpipe high-voltage signal and the chamber pressure normal signal, to the blower and all feeder hairs
Send protection stop signal.
2. the method according to claim 1, wherein described ought detect that the chamber pressure value is less than institute
When stating default chamber pressure threshold value, generate chamber pressure normal signal the step of, comprising:
It is more than default burner hearth when the time that the chamber pressure value detected is less than the default chamber pressure threshold value
When negative pressure duration, chamber pressure normal signal is generated.
3. the method according to claim 1, wherein described according to the standpipe high-voltage signal and the combustion chamber
Pressure normal signal sends the mode of protection stop signal to the blower and all feeders, comprising:
It is moved when the standpipe high-voltage signal and the chamber pressure normal signal that obtain simultaneously continue a default banking fire protection
When making duration, protection stop signal is sent to the blower and all feeders.
4. the method according to claim 1, wherein described according to the standpipe high-voltage signal and the combustion chamber
Pressure normal signal sends the mode of protection stop signal to the blower and all feeders, comprising:
Obtain banking fire protection investment signal；
When banking fire protection investment signal, the standpipe high-voltage signal and the chamber pressure normal signal obtained simultaneously
When continuing a default banking fire protection act duration, protection stop signal is sent to the blower and all feeders.
5. the method according to claim 1, wherein obtaining the mode of the chamber pressure value, comprising:
Obtain the pressure value of the multiple sampled points in combustion chamber top；
Using the average pressure value of the multiple sampled point as the chamber pressure value.
6. the method according to claim 1, wherein the blower includes primary air fan and secondary air fan；It is described
Protect stop signal, comprising:
The halt instruction sent to the primary air fan；
The opening value clear instruction sent to the secondary air fan, and
The halt instruction sent to the feeder.
7. the method according to claim 1, wherein the method also includes:
When the middle material position pressure value for detecting any one of material returning valve standpipe be more than the second default standpipe pressure threshold value when
Between more than a default shunt tripping feeder movement duration when, send halt instruction to feeder corresponding with the material returning valve standpipe.
8. system is protected in a kind of banking fire, it is applied to circulating fluidized bed boiler, circulating fluidized bed boiler includes combustion chamber, blower, more
A material returning valve standpipe and feeder, which is characterized in that the system comprises:
Pressure detecting assembly, for obtaining the standpipe pressure value of the chamber pressure value and each material returning valve standpipe；
Logic control component detects that the chamber pressure value is less than a default chamber pressure threshold value for working as, and appoints
When the standpipe pressure value of a material returning valve standpipe of anticipating is more than default standpipe pressure threshold value, to the blower and all described give
Coal machine sends protection stop signal, to carry out banking fire protection to the circulating fluidized bed boiler；
The pressure detecting assembly and the logic control component, which cooperate, realizes pressure described in claim 1-7 any one
Fiery guard method.
9. system according to claim 8, it is characterised in that:
The logic control component is also used to when the middle material position pressure value that detect any one of material returning valve standpipe be more than the
When the time of two default standpipe pressure threshold values is more than a default shunt tripping feeder movement duration, to corresponding with the material returning valve standpipe
Feeder sends halt instruction.
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| CN201710068903.7A CN106678787B (en) | 2017-02-08 | 2017-02-08 | Banking fire guard method and system |
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| CN201710068903.7A CN106678787B (en) | 2017-02-08 | 2017-02-08 | Banking fire guard method and system |
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| 高压流化风机跳停时间和逻辑顺序对CFB锅炉运行的影响——兼论某循环流化床锅炉回料阀堵塞问题;程文峰;《2013年江西省电机工程学会年会论文集》;20131213;第221-224页 |
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| CN106678787A (en) | 2017-05-17 |
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