CN106765030A - The decision method that supercritical DC opposed firing Boiler Furnace bottom is leaked out - Google Patents
The decision method that supercritical DC opposed firing Boiler Furnace bottom is leaked out Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/38—Determining or indicating operating conditions in steam boilers, e.g. monitoring direction or rate of water flow through water tubes
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Abstract
The present invention provides the decision method that a kind of supercritical DC opposed firing Boiler Furnace bottom is leaked out, and is related to power plant's technical field.Methods described includes：Obtain the service data at supercritical DC opposed firing Boiler Furnace bottom：Obtain parameter threshold set in advance；The situation of leaking out at the supercritical DC opposed firing Boiler Furnace bottom is judged according to the service data and parameter threshold.The present invention realizes the judgement leaked out to supercritical DC opposed firing Boiler Furnace bottom, and can determine the size of inleakage, is that boiler preferably runs and provides certain foundation, with important theory significance and construction value.
Description
Technical field
On power plant's technical field, especially with regard to the boiler plant of thermal power plant, be concretely that one kind is super faces the present invention
The decision method that boundary leaks out at direct current opposed firing Boiler Furnace bottom.
Background technology
At present in unit running process, the influence to the economy and security of unit of leaking out should not be underestimated.Leak out bag
Include that burner hearth leaks out, air preheater air leakage, air leakage into flue duct and furnace bottom leak out, wherein maximum with furnace bottom influence of leaking out.The cold wind of furnace bottom
In the presence of boiler negative pressure, cold air enters burner hearth from furnace bottom.For dry bottom ash handling system, leak out inevitable, and leak out
Amount is smaller, and economy and security to unit do not result in too big threat.But slag drying machine is generally mechanical seal, and have a lot
Peep hole, these designs may cause cold wind largely to be leak into from furnace bottom.For wet slag removal system, when water seal is destroyed
Afterwards, enter burner hearth in the cold wind short time, often cause gas temperature windage to increase, negative pressure fluctuation in burner hearth, fuel combustion is unstable, very
To protection act.
Therefore, how to research and develop out a kind of new scheme, its whether Boiler Furnace bottom can be leaked out judge into
And it is this area technical barrier urgently to be resolved hurrily to improve unit safety.
The content of the invention
The invention provides the decision method that a kind of supercritical DC opposed firing Boiler Furnace bottom is leaked out, realize to super
The judgement leaked out at critical direct current opposed firing Boiler Furnace bottom, and the size of inleakage can be determined, it is that boiler preferably runs
Certain foundation is provided, with important theory significance and construction value.
It is an object of the present invention to provide the decision method that a kind of supercritical DC opposed firing Boiler Furnace bottom is leaked out, institute
The method of stating includes：
Obtain the service data at supercritical DC opposed firing Boiler Furnace bottom：
Obtain parameter threshold set in advance；
The leakage at the supercritical DC opposed firing Boiler Furnace bottom is judged according to the service data and parameter threshold
Landscape condition.
The beneficial effects of the present invention are, there is provided the judgement that a kind of supercritical DC opposed firing Boiler Furnace bottom is leaked out
Method, realizes the judgement leaked out to supercritical DC opposed firing Boiler Furnace bottom, and can determine the size of inleakage, is
Boiler preferably runs and provides certain foundation, with important theory significance and construction value.
It is that above and other objects, features and advantages of the invention can be become apparent, preferred embodiment cited below particularly,
And coordinate institute's accompanying drawings, it is described in detail below.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the decision method that a kind of supercritical DC opposed firing Boiler Furnace bottom provided in an embodiment of the present invention is leaked out
Implementation method one flow chart；
Fig. 2 is the particular flow sheet of the implementation method one of the step S103 in Fig. 1；
Fig. 3 is the particular flow sheet of the implementation method two of the step S103 in Fig. 1；
Fig. 4 is the decision method that a kind of supercritical DC opposed firing Boiler Furnace bottom provided in an embodiment of the present invention is leaked out
Implementation method two flow chart.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Art technology technical staff knows, embodiments of the present invention can be implemented as a kind of system, device, equipment,
Method or computer program product.Therefore, the disclosure can be implemented as following form, i.e.,：It is complete hardware, complete soft
Part (including firmware, resident software, microcode etc.), or the form that hardware and software is combined.
Abbreviation of the invention and Key Term are introduced first.
Main frame：For Thermal generation unit, main frame is often referred to main ground equipment in generating flow, including boiler,
Steam turbine, generator and main transformer.
Subsidiary engine：Equipment in addition to main frame is referred to as subsidiary engine.
The invention provides the decision method that a kind of supercritical DC opposed firing Boiler Furnace bottom is leaked out, although following real
The module described by example is applied preferably to be realized with software, but hardware, or the combination of software and hardware realization be also can
Can and be contemplated.
Fig. 1 is the decision method that a kind of supercritical DC opposed firing Boiler Furnace bottom provided in an embodiment of the present invention is leaked out
Flow chart, refer to Fig. 1, methods described includes：
S101：Obtain the service data at supercritical DC opposed firing Boiler Furnace bottom.In a particular embodiment, transport
Row data can be obtained by the scattered control system direct access of power plant, flame brightness that it includes Initial Stage after Ignition, coal powder density,
Before and after fiery thermometry degree, the current value of air-introduced machine, the current value of air preheater, the flue-gas temperature value of furnace outlet and supercritical DC
Wall opposed firing boiler total blast volume.
S102：Parameter threshold set in advance is obtained, in a particular embodiment, parameter threshold includes scheduled time threshold
Value, maximum brightness value, brightness minimum, coal powder density threshold value, fire inspection temperature threshold, the current threshold of air-introduced machine, air preheater
The flue-gas temperature threshold value of current threshold and furnace outlet.
S103：The supercritical DC opposed firing Boiler Furnace bottom is judged according to the service data and parameter threshold
Situation of leaking out.Fig. 2 is the particular flow sheet of step S103, refers to Fig. 2, and the step includes in implementation method one：
S201：Judge the flame brightness whether repeatedly reached in the scheduled time threshold value maximum brightness value with
The brightness minimum, when being judged as YES, performs step S202；
S202：Judge whether the coal powder density reaches the coal powder density threshold value, when being judged as YES, perform step
S203；
S203：Judge whether the fiery thermometry degree repeatedly exceedes the fire inspection temperature threshold, when being judged as YES, perform step
Rapid S204；
S204：When being judged as YES, judge whether the current value of the air-introduced machine exceedes the current threshold of the air-introduced machine,
When being judged as YES, step S205 is performed；
S205：Judge whether the current value of the air preheater exceedes the current threshold of the air preheater, when being judged as YES,
Perform step S206；
S206：Judge whether the flue-gas temperature value of the furnace outlet exceedes the flue-gas temperature threshold value of the furnace outlet,
When being judged as YES, step S207 is performed；
S207：The supercritical DC opposed firing Boiler Furnace bottom is present leaks out.
That is, at the ignition of the boiler initial stage, combustion case is poor, show as that flame is flickering, close-ups have black smoke,
Fiery thermometry degree is unstable, and air-introduced machine electric current is possible to raise, and air preheater electric current is basically unchanged, and flue gas temperature of hearth outlet is raised
When, furnace bottom presence is can be identified as substantially leaks out.
As described above, the judgement side that a kind of supercritical DC opposed firing Boiler Furnace bottom for being present invention offer is leaked out
Method, realizes the judgement leaked out to supercritical DC opposed firing Boiler Furnace bottom, is that boiler preferably runs offer necessarily
Foundation, with important theory significance and construction value.
In other embodiment of the invention, the service data also includes exerting oneself for the pressure fan after ignition of the boiler
Value, the CO concentration values of superheat steam temperature value, reheat steam temperature value, the exhaust gas volumn of furnace outlet, furnace outlet.The parameter
Threshold value also goes out force threshold, superheat steam temperature threshold value, reheat steam temperature threshold value, the exhaust gas volumn of furnace outlet including pressure fan
The CO concentration thresholds of threshold value and furnace outlet.Fig. 3 is the particular flow sheet of the implementation method two of the step S103 in Fig. 1, such as
Shown in Fig. 3, in implementation method two, the step includes：
S301：Judge the flame brightness whether repeatedly reached in the scheduled time threshold value maximum brightness value with
The brightness minimum, when being judged as YES, performs step S302；
S302：Judge whether the coal powder density reaches the coal powder density threshold value, when being judged as YES, perform step
S303；
S303：Judge whether the fiery thermometry degree repeatedly exceedes the fire inspection temperature threshold, when being judged as YES, perform step
Rapid S304；
S304：When being judged as YES, judge whether the current value of the air-introduced machine exceedes the current threshold of the air-introduced machine,
When being judged as YES, step S305 is performed；
S305：Judge whether the current value of the air preheater exceedes the current threshold of the air preheater, when being judged as YES,
Perform step S306；
S306：Judge whether the flue-gas temperature value of the furnace outlet exceedes the flue-gas temperature threshold value of the furnace outlet,
When being judged as YES, step S307 is performed；
S307：Judge that what whether the power generating value of the pressure fan reached the pressure fan goes out force threshold, when being judged as YES,
Perform step S308；
S308：Judge whether the superheat steam temperature value reaches the superheat steam temperature threshold value, when being judged as YES,
Perform step S309；
S309：Judge whether the reheat steam temperature value reaches the reheat steam temperature threshold value, when being judged as YES,
Perform step S310；
S310：Judge whether the flue gas value of the furnace outlet reaches the exhaust gas volumn threshold value of the furnace outlet, when sentencing
Breaking during to be, performing step S311；
S311：Judge whether the CO concentration values of the furnace outlet reach the CO concentration thresholds of the furnace outlet, when sentencing
Breaking during to be, performing step S312；
S312：The supercritical DC opposed firing Boiler Furnace bottom is present leaks out.
That is, in the present embodiment, at the ignition of the boiler initial stage, combustion case is poor, it is flickering to show as flame, closely
Distance observation has black smoke, and fiery thermometry degree is unstable；After ignition of the boiler, pressure fan output drop；Air-introduced machine electric current is possible to raise；
Hot vapour, reheating vapour overtemperature are crossed, the alarming value close to the setting of even more than power plant is shown as；Air preheater electric current is basically unchanged；Burner hearth
Exit gas temperature is raised；Furnace outlet flue gas amount increases；When furnace outlet CO concentration is raised, it may be determined that leaked for furnace bottom is present
Wind.
As described above, the judgement side that a kind of supercritical DC opposed firing Boiler Furnace bottom for being present invention offer is leaked out
Method, realizes the judgement leaked out to supercritical DC opposed firing Boiler Furnace bottom, is that boiler preferably runs offer necessarily
Foundation, with important theory significance and construction value.
Fig. 4 is the decision method that a kind of supercritical DC opposed firing Boiler Furnace bottom provided in an embodiment of the present invention is leaked out
Implementation method two flow chart, refer to Fig. 4, the method includes in implementation method two：
S401：Obtain the service data at supercritical DC opposed firing Boiler Furnace bottom.In a particular embodiment, transport
Row data can be obtained by the scattered control system direct access of power plant, flame brightness that it includes Initial Stage after Ignition, coal powder density,
Before and after fiery thermometry degree, the current value of air-introduced machine, the current value of air preheater, the flue-gas temperature value of furnace outlet and supercritical DC
Wall opposed firing boiler total blast volume.
S402：Parameter threshold set in advance is obtained, in a particular embodiment, parameter threshold includes scheduled time threshold
Value, maximum brightness value, brightness minimum, coal powder density threshold value, fire inspection temperature threshold, the current threshold of air-introduced machine, air preheater
The flue-gas temperature threshold value of current threshold and furnace outlet.
S403：The supercritical DC opposed firing Boiler Furnace bottom is judged according to the service data and parameter threshold
Situation of leaking out.
S404：Determine described super according to Fluent Method for Numerical and supercritical DC opposed firing boiler total blast volume
The inleakage at critical direct current opposed firing Boiler Furnace bottom, the step includes：
S501：Linear relationship is determined according to Fluent Method for Numerical, the linear relationship is：
Tout=0.003x4-0.067x3+0.301x2+1.546x+1330
Wherein, Tout is flue gas temperature of hearth outlet value, and x is furnace bottom air leak rate of air curtain, is supercritical DC opposed firing pot
The inleakage of stove furnace bottom and the ratio of supercritical DC opposed firing boiler total blast volume.
S502：The furnace bottom air leak rate of air curtain is determined according to the linear relationship and flue gas temperature of hearth outlet value；
S503：Described super face is determined according to the furnace bottom air leak rate of air curtain and supercritical DC opposed firing boiler total blast volume
The inleakage at boundary direct current opposed firing Boiler Furnace bottom.
As described above, the judgement side that a kind of supercritical DC opposed firing Boiler Furnace bottom for being present invention offer is leaked out
Method, realizes the judgement leaked out to supercritical DC opposed firing Boiler Furnace bottom, and can determine the size of inleakage, is pot
Stove preferably runs and provides certain foundation, with important theory significance and construction value.
In the present invention, the size of the bottom air leak rate of air curtain that can generally be come out of the stove according to the change calculations of furnace outlet gas temperature, when leaking out
When rate is less than 2%, burner hearth economy and security are hardly impacted, flue gas temperature of hearth outlet change is little；Work as stove
When bottom air leak rate of air curtain is less than 7% more than 2%, furnace exit temperature raises about 10 DEG C or so, should draw attention and (run people in power plant
Member's moment concern temperature point, they can see temperature variation curve, when seeing that raising 10 DEG C should draw attention, but table
Information warning will not be sent on disk, unless can just be alarmed more than alarming value)；When furnace bottom air leak rate of air curtain is more than 7%, send, air-introduced machine
And furnace exit temperature can all cause large effect, certain threat is constituted to unit economy and security, should stood
Take measures, for dried slag removing, scene should be gone to patrol and examine, closure is leaked out a little or installs the measures such as controllable register drop in air inlet
Low furnace bottom leaks out.For wet type deslagging, scene should be gone to patrol and examine, find out to leak out and a little blocked.
It should be noted that although the operation of the inventive method is described with particular order in the accompanying drawings, this is not required that
Or imply that these must be performed according to the particular order operates, or the operation having to carry out shown in whole could realize the phase
The result of prestige.Additionally or alternatively, it is convenient to omit some steps, multiple steps are merged into a step to perform, and/or will
One step is decomposed into execution of multiple steps.
Although additionally, be referred to some unit modules of system in above-detailed, this division is only simultaneously
Non-imposed.In fact, according to the embodiment of the present invention, the feature and function of above-described two or more units can
To embody in a unit.Equally, the feature and function of an above-described unit can also be further divided into by
Multiple units embody.
Can clearly be distinguished for the improvement of a technology is improvement on hardware (for example, to diode, crystal
Pipe, switch etc. circuit structure improvement) or software on improvement (for the improvement of method flow).However, with technology
Development, the improvement of current many method flows can be considered as directly improving for hardware circuit.Designer is almost
All corresponding hardware circuit is obtained by the way that improved method flow is programmed into hardware circuit.Therefore, it cannot be said that one
The improvement of individual method flow cannot be realized with hardware entities module.For example, PLD (Programmable
Logic Device, PLD) (such as field programmable gate array (Field Programmable Gate Array, FPGA)) just
It is such a integrated circuit, its logic function is determined by user to device programming.Voluntarily program to come one by designer
Individual digital display circuit " integrated " on a piece of PLD, without asking chip maker to design and make special integrated circuit
Chip 2.And, nowadays, substitution manually makes IC chip, and " logic compiler is also used in this programming instead mostly
(logic compiler) " softwares realize that software compiler used is similar when it writes with program development, and to compile
Also handy specific programming language is write for source code before, and this is referred to as hardware description language (Hardware
Description Language, HDL), and HDL is also not only a kind of, but have many kinds, such as ABEL (Advanced
Boolean Expression Language)、AHDL(Altera Hardware Description Language)、
Confluence、CUPL(Cornell University Programming Language)、HDCal、JHDL(Java
Hardware Description Language)、Lava、Lola、MyHDL、PALASM、RHDL(Ruby Hardware
Description Language) etc., that most commonly use at present is VHDL (Very-High-Speed Integrated
Circuit Hardware Description Language) and Verilog2.Those skilled in the art also will be apparent to the skilled artisan that only
Need with above-mentioned several hardware description languages slightly programming in logic and to be programmed into method flow in integrated circuit, it is possible to hold very much
The hardware circuit of the easy accomplished logical method flow.
Controller can be implemented in any suitable manner, for example, controller can take such as microprocessor or treatment
Device and storage can by the computer of the computer readable program code (such as software or firmware) of (micro-) computing device
Read medium, gate, switch, application specific integrated circuit (Application Specific Integrated Circuit,
ASIC), the form of programmable logic controller (PLC) and embedded microcontroller, the example of controller includes but is not limited to following microcontroller
Device：ARC 625D, Atmel AT91SAM, Microchip PIC18F26K20 and Silicone Labs C8051F320, deposit
Memory controller is also implemented as a part for the control logic of memory.
It is also known in the art that in addition to realizing controller in pure computer readable program code mode, it is complete
Entirely can by by method and step carry out programming in logic come cause controller with gate, switch, application specific integrated circuit, may be programmed
Logic controller realizes identical function with the form of embedded microcontroller etc..Therefore this controller is considered one kind
Hardware component, and the device for realizing various functions to including in it can also be considered as the structure in hardware component.Or
Even, can be used to realizing that the device of various functions is considered as not only being the software module of implementation method but also can be Hardware Subdivision
Structure in part.
System, device, module or unit that above-described embodiment is illustrated, can specifically be realized by computer chip or entity,
Or realized by the product with certain function.
For convenience of description, it is divided into various units with function during description apparatus above to describe respectively.Certainly, this is being implemented
The function of each unit can be realized in same or multiple softwares and/or hardware during application.
As seen through the above description of the embodiments, those skilled in the art can be understood that the application can
Realized by the mode of software plus required general hardware platform.Based on such understanding, the technical scheme essence of the application
On the part that is contributed to prior art in other words can be embodied in the form of software product, the computer software product
Can store in storage medium, such as ROM/RAM, magnetic disc, CD, including some instructions are used to so that a computer equipment
(can be personal computer, server, or network equipment etc.) performs some of each embodiment of the application or embodiment
Method described in part.
Each embodiment in this specification is described by the way of progressive, identical similar portion between each embodiment
Divide mutually referring to what each embodiment was stressed is the difference with other embodiment.Especially for system reality
Apply for example, because it is substantially similar to embodiment of the method, so description is fairly simple, related part is referring to embodiment of the method
Part explanation.
The application can be used in numerous general or special purpose computing system environments or configuration.For example：Personal computer, clothes
Business device computer, handheld device or portable set, laptop device, multicomputer system, the system based on microprocessor, put
Top box, programmable consumer-elcetronics devices, network PC, minicom, mainframe computer, including any of the above system or equipment
DCE etc..
The application can be described in the general context of computer executable instructions, such as program
Module.Usually, program module includes performing particular task or realizes routine, program, object, the group of particular abstract data type
Part, data structure etc..The application can also be in a distributed computing environment put into practice, in these DCEs, by
Remote processing devices connected by communication network perform task.In a distributed computing environment, program module can be with
In local and remote computer-readable storage medium including including storage device.
Although depicting the application by embodiment, it will be appreciated by the skilled addressee that the application have it is many deformation and
Change is without deviating from spirit herein, it is desirable to which appended claim includes these deformations and changes without deviating from the application's
Spirit.
Claims (10)
1. the decision method that a kind of supercritical DC opposed firing Boiler Furnace bottom is leaked out, it is characterized in that, methods described includes：
Obtain the service data at supercritical DC opposed firing Boiler Furnace bottom：
Obtain parameter threshold set in advance；
The feelings of leaking out at the supercritical DC opposed firing Boiler Furnace bottom are judged according to the service data and parameter threshold
Condition.
2. method according to claim 1, it is characterized in that, the service data includes flame brightness, the coal of Initial Stage after Ignition
Powder concentration, fiery thermometry degree, the current value of air-introduced machine, the current value of air preheater, the flue-gas temperature value of furnace outlet and overcritical
Direct current opposed firing boiler total blast volume.
3. method according to claim 2, it is characterized in that, the parameter threshold includes scheduled time threshold value, brightness highest
Value, brightness minimum, coal powder density threshold value, fire inspection temperature threshold, the current threshold of air-introduced machine, the current threshold of air preheater and
The flue-gas temperature threshold value of furnace outlet.
4. method according to claim 3, it is characterized in that, judge described super according to the service data and parameter threshold
The situation of leaking out at critical direct current opposed firing Boiler Furnace bottom includes：
Judge whether the flame brightness repeatedly reaches the maximum brightness value with the brightness in the scheduled time threshold value
Minimum；
When being judged as YES, judge whether the coal powder density reaches the coal powder density threshold value；
When being judged as YES, judge whether the fiery thermometry degree repeatedly exceedes the fire inspection temperature threshold；
When being judged as YES, judge whether the current value of the air-introduced machine exceedes the current threshold of the air-introduced machine；
When being judged as YES, judge whether the current value of the air preheater exceedes the current threshold of the air preheater；
When being judged as YES, judge whether the flue-gas temperature value of the furnace outlet exceedes the flue-gas temperature threshold of the furnace outlet
Value；
When being judged as YES, the supercritical DC opposed firing Boiler Furnace bottom is present leaks out.
5. method according to claim 3, it is characterized in that, the service data also includes the pressure fan after ignition of the boiler
Power generating value, superheat steam temperature value, reheat steam temperature value, the exhaust gas volumn of furnace outlet, the CO concentration values of furnace outlet.
6. method according to claim 4, it is characterized in that, the parameter threshold also goes out force threshold, mistake including pressure fan
The CO concentration thresholds of vapours temperature threshold, reheat steam temperature threshold value, the exhaust gas volumn threshold value of furnace outlet and furnace outlet.
7. method according to claim 6, it is characterized in that, judge described super according to the service data and parameter threshold
The situation of leaking out at critical direct current opposed firing Boiler Furnace bottom includes：
Judge whether the flame brightness repeatedly reaches the maximum brightness value with the brightness in the scheduled time threshold value
Minimum；
When being judged as YES, judge whether the coal powder density reaches the coal powder density threshold value；
When being judged as YES, judge whether the fiery thermometry degree repeatedly exceedes the fire inspection temperature threshold；
When being judged as YES, judge whether the current value of the air-introduced machine exceedes the current threshold of the air-introduced machine；
When being judged as YES, judge whether the current value of the air preheater exceedes the current threshold of the air preheater；
When being judged as YES, judge whether the flue-gas temperature value of the furnace outlet exceedes the flue-gas temperature threshold of the furnace outlet
Value；
When being judged as YES, judge that what whether the power generating value of the pressure fan reached the pressure fan goes out force threshold；
When being judged as YES, judge whether the superheat steam temperature value reaches the superheat steam temperature threshold value；
When being judged as YES, judge whether the reheat steam temperature value reaches the reheat steam temperature threshold value；
When being judged as YES, judge whether the flue gas value of the furnace outlet reaches the exhaust gas volumn threshold value of the furnace outlet；
When being judged as YES, judge whether the CO concentration values of the furnace outlet reach the CO concentration thresholds of the furnace outlet；
When being judged as YES, the supercritical DC opposed firing Boiler Furnace bottom is present leaks out.
8. the method according to claim 4 or 7, it is characterized in that, methods described also includes：
The supercritical DC is determined according to Fluent Method for Numerical and supercritical DC opposed firing boiler total blast volume
The inleakage at opposed firing Boiler Furnace bottom.
9. method according to claim 8, it is characterized in that, according to Fluent Method for Numerical, flue gas temperature of hearth outlet
Value and supercritical DC opposed firing boiler total blast volume determine the leakage at the supercritical DC opposed firing Boiler Furnace bottom
Air quantity includes：
Linear relationship is determined according to Fluent Method for Numerical；
The furnace bottom air leak rate of air curtain is determined according to the linear relationship and flue gas temperature of hearth outlet value；
Before determining the supercritical DC according to the furnace bottom air leak rate of air curtain and supercritical DC opposed firing boiler total blast volume
The inleakage of wall opposed firing boiler furnace bottom afterwards.
10. method according to claim 9, it is characterized in that, the linear relationship is：
Tout=0.003x4-0.067x3+0.301x2+1.546x+1330
Wherein, Tout is flue gas temperature of hearth outlet value, and x is furnace bottom air leak rate of air curtain, is supercritical DC opposed firing Boiler Furnace
The inleakage at bottom and the ratio of supercritical DC opposed firing boiler total blast volume.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191918A (en) * | 2017-06-14 | 2017-09-22 | 华北电力科学研究院有限责任公司 | Boiler Furnace bottom inleakage determines method and device |
| CN112504708A (en) * | 2020-11-18 | 2021-03-16 | 西安热工研究院有限公司 | Method for measuring air leakage rate of dry slag machine |
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| CN107191918B (en) * | 2017-06-14 | 2019-07-19 | 华北电力科学研究院有限责任公司 | Boiler Furnace bottom inleakage determines method and device |
| CN112504708A (en) * | 2020-11-18 | 2021-03-16 | 西安热工研究院有限公司 | Method for measuring air leakage rate of dry slag machine |
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