CN106594789A - Air leakage control system of air preheater - Google Patents
Air leakage control system of air preheater Download PDFInfo
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- CN106594789A CN106594789A CN201611265785.0A CN201611265785A CN106594789A CN 106594789 A CN106594789 A CN 106594789A CN 201611265785 A CN201611265785 A CN 201611265785A CN 106594789 A CN106594789 A CN 106594789A
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- Prior art keywords
- air preheater
- air
- fanning strip
- control system
- rotor
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L2900/00—Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber
- F23L2900/15043—Preheating combustion air by heat recovery means located in the chimney, e.g. for home heating devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Supply (AREA)
Abstract
The invention discloses an air leakage control system of an air preheater. The system comprises a rotor deformation detecting device connected with the air preheater and used for detecting the deformation amount of a rotor of the air preheater, a sector plate lifting device connected with the air preheater and used for conducting lifting operation on a sector plate of the air preheater, a displacement detecting device connected with the sector plate lifting device and used for detecting decreasing displacement of the sector plate, and an air leakage control cabinet connected with the rotor deformation detecting device, the sector plate lifting device and the displacement detecting device and used for obtaining a sealing clearance value of the air preheater through the deformation amount of the rotor and the decreasing displacement of the sector plate and controlling the sector plate lifting device to operate according to the sealing clearance value. The technical problems that in the prior art, air leakage control systems of air preheaters are low in control precision and liable to be damaged and cannot be maintained online are solved.
Description
Technical field
The present invention relates to automation field, in particular to a kind of leak control system of air preheater.
Background technology
Rotary regenerative air preheater is widely used in large thermal power plant, is to reduce coal consumption, improve the weight of boiler thermal output
Want part.But, the rotor of rotary regenerative air preheater typically can produce the situation of leaking out because there is " mushroom " thermal deformation.
Situation of leaking out can not only increase exhaust gas heat loss and become estranged air-introduced machine power consumption, and can accelerate heated surface corrosion because cigarette temperature drop is low.When
When situation of leaking out is serious, will cause to send into the air capacity deficiency that boiler participates in burning, so as to directly affect boiler output.
Leak control system be in order to solve air preheater rotor thermal deformation initiation Air Leakage and design it is a set of
Automatic following control system, it can be with the heat distortion amount of real-time tracking rotor and then fan-shaped by the control of fanning strip elevating mechanism
The up and down motion of plate so that seal clearance is maintained at zone of reasonableness.It is coal-fired that leak control system can be obviously reduced per kilowatt
Consume, improve unit operation efficiency.At present, leak control system of the prior art is typically passed using mechanical probe or current vortex
Sensor direct detection seal clearance, but, either mechanical probe or current vortex sensor, are required for being installed on air in advance
Inside preheater, and exist work under bad environment, service life it is of short duration, cannot on-line maintenance change etc. defect.To sum up, it is existing
With the presence of the leak control system control accuracy of the air preheater in technology it is relatively low, fragile and cannot on-line maintenance skill
Art problem.
For above-mentioned problem, effective solution is not yet proposed at present.
The content of the invention
A kind of leak control system of air preheater is embodiments provided, it is of the prior art at least to solve
Control accuracy that the leak control system of air preheater is present it is relatively low, fragile and cannot on-line maintenance technical problem.
One side according to embodiments of the present invention, there is provided a kind of leak control system of air preheater, the system
Including：Rotor deformation detection means, is connected with air preheater, for detecting the deformation quantity of the rotor of above-mentioned air preheater；
Fanning strip lowering or hoisting gear, is connected with above-mentioned air preheater, for carrying out descending operation to the fanning strip of above-mentioned air preheater；
Displacement detector, is connected with above-mentioned fanning strip lowering or hoisting gear, for detecting the decentralization displacement of above-mentioned fanning strip；Air leakage control
Cabinet, is connected respectively, for root with above-mentioned rotor deformation detection means, above-mentioned fanning strip lowering or hoisting gear and upper displacement sensing device
The seal clearance value of above-mentioned air preheater is obtained according to the deformation quantity of above-mentioned rotor and the decentralization displacement of above-mentioned fanning strip, and according to
Above-mentioned seal clearance value controls above-mentioned fanning strip lowering or hoisting gear operation.
Further, above-mentioned Air leakage control cabinet includes：Computing circuit, respectively with above-mentioned rotor deformation detection means and above-mentioned
Displacement detector connects, pre- for obtaining above-mentioned air according to the decentralization displacement of the deformation quantity of above-mentioned rotor and above-mentioned fanning strip
The seal clearance value of hot device；First control circuit, is connected with above-mentioned computing circuit, for according to the sealing of above-mentioned air preheater
Gap width and default seal clearance value scope generate the first control signal.
Further, said system also includes：Local control device, respectively with above-mentioned fanning strip lowering or hoisting gear and above-mentioned control
Circuit connection processed, for controlling above-mentioned fanning strip lowering or hoisting gear operation according to above-mentioned first control signal.
Further, said system also includes：Motor detection apparatus, respectively with above-mentioned air preheater and above-mentioned control of leaking out
Cabinet connection processed, for detecting the current value and tachometer value of the motor of above-mentioned air preheater.
Further, above-mentioned Air leakage control cabinet also includes：First decision circuitry, is connected with above-mentioned motor detection apparatus, uses
In judging the current value of above-mentioned motor whether within the scope of pre-set current value, so as to generate the first judged result；Second
Whether decision circuitry, is connected with above-mentioned motor detection apparatus, for judging the tachometer value of above-mentioned motor in preset rotation speed value
Within the scope of, so as to generate the second judged result；Second control circuit, sentences respectively with above-mentioned first decision circuitry and above-mentioned second
Deenergizing connects, for generating the second control signal according to above-mentioned first judged result or above-mentioned second judged result, wherein, on
State the second control signal is carried out for indicating that above-mentioned local control device controls above-mentioned fanning strip lowering or hoisting gear to above-mentioned fanning strip
Emergency lifting is operated.
Further, above-mentioned rotor deformation detection means is laser sensor or temperature sensor.
Further, above-mentioned laser sensor is arranged at the hot junction face truss of above-mentioned air preheater, said temperature sensing
Device is arranged at the air inlet of above-mentioned air preheater and gas outlet.
Further, above-mentioned rotor deformation detection means is connected with the hot junction face of above-mentioned air preheater.
Further, above-mentioned fanning strip lowering or hoisting gear is screw-threaded shaft elevator.
Further, reductor is provided with above-mentioned screw-threaded shaft elevator, for when above-mentioned screw-threaded shaft elevator runs, to upper
Stating screw-threaded shaft elevator carries out deceleration-operation.
In embodiments of the present invention, the leak control system of above-mentioned air preheater is detected by rotor deformation detection means
The deformation quantity of the rotor of air preheater, and the decentralization position of the fanning strip of air preheater is detected by displacement detector
Move, and then the air preheater is obtained according to the deformation quantity of the rotor and the decentralization displacement of the fanning strip by Air leakage control cabinet
Seal clearance value, has reached the purpose according to the seal clearance value control fanning strip lowering or hoisting gear operation, it is achieved thereby that being lifted
The technique effect of the control efficiency of the leak control system of air preheater, also achieves to air preheater effective control
Under the premise of reduce the air leak rate of air curtain of air preheater and improve the technique effect of its efficiency of combustion, and then solve in prior art
Air preheater the control accuracy that exists of leak control system it is relatively low, fragile and cannot the technology of on-line maintenance ask
Topic.
Description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this
Bright schematic description and description does not constitute inappropriate limitation of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the structural representation of the leak control system of a kind of optional air preheater according to embodiments of the present invention
Figure；
Fig. 2 is the structural representation of the leak control system of the optional air preheater of another kind according to embodiments of the present invention
Figure；
Fig. 3 is that the flow process of the Air leakage control method of a kind of optional air preheater according to embodiments of the present invention is illustrated
Figure.
Specific embodiment
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, is clearly and completely described to the technical scheme in the embodiment of the present invention, it is clear that described embodiment is only
The embodiment of a part of the invention, rather than the embodiment of whole.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, should all belong to the model of present invention protection
Enclose.
It should be noted that description and claims of this specification and the term " first " in above-mentioned accompanying drawing, "
Two " it is etc. the object for distinguishing similar, without for describing specific order or precedence.It should be appreciated that so using
Data can exchange in the appropriate case, so as to embodiments of the invention described herein can with except illustrating here or
Order beyond those of description is implemented.Additionally, term " comprising " and " having " and their any deformation, it is intended that cover
Lid is non-exclusive to be included, and for example, process, method, system, product or the equipment for containing series of steps or unit is not necessarily limited to
Those steps clearly listed or unit, but may include clearly not list or for these processes, method, product
Or intrinsic other steps of equipment or unit.
Embodiment 1
According to embodiments of the present invention, there is provided a kind of embodiment of the leak control system of air preheater, Fig. 1 is basis
The structural representation of the leak control system of a kind of optional air preheater of the embodiment of the present invention, as shown in figure 1, the air
The leak control system of preheater includes：
Rotor deformation detection means 101, is connected with air preheater 103, for detecting the shape of the rotor of air preheater
Variable；Fanning strip lowering or hoisting gear 105, is connected with air preheater 103, for rising to the fanning strip of air preheater 103
Drop operation；Displacement detector 107, is connected with fanning strip lowering or hoisting gear 105, for detecting the decentralization displacement of fanning strip；Leak out
Switch board 109, is connected respectively with rotor deformation detection means 101, fanning strip lowering or hoisting gear 105 and displacement detector 107, uses
The seal clearance value of air preheater 103 is obtained in the decentralization displacement of the deformation quantity according to rotor and fanning strip, and according to sealing
Gap width control fanning strip lowering or hoisting gear 105 runs.
Alternatively, in embodiments of the present invention, the leak control system of above-mentioned air preheater is detected by rotor deformation
The deformation quantity of the rotor of device detection air preheater, and the fanning strip of air preheater is detected by displacement detector
Decentralization displacement, and then it is pre- to obtain the air according to the deformation quantity of the rotor and the decentralization displacement of the fanning strip by Air leakage control cabinet
The seal clearance value of hot device, has reached the purpose according to the seal clearance value control fanning strip lowering or hoisting gear operation, so as to realize
The technique effect of the control efficiency of the leak control system of air preheater is lifted, is also achieved effective to air preheater
The air leak rate of air curtain of air preheater is reduced on the premise of control and the technique effect of its efficiency of combustion is improved, and then is solved existing
Control accuracy that the leak control system of the air preheater in technology is present it is relatively low, fragile and cannot on-line maintenance skill
Art problem.
Alternatively, air preheater (air pre-heater) is commonly abbreviated as air preheater, by boiler back end ductwork
Flue gas by internal fin by the heating surface into the air preheat before boiler to uniform temperature, for improving boiler
Heat exchange performance, reduces energy ezpenditure.It is used for coal-fired power station boiler.Air preheater can be divided into two kinds of box type, swinging,
Wherein swinging is divided into two kinds of fan housing swinging and heating surface swinging again.Station boiler is compared with frequently with the preheating of heating surface swinging
Device.The generally Liang Fencang of application in the boiler, San Fencang, four warehouse separated types, wherein four points of storehouses are more common in recirculating fluidized bed pot
In stove.
Alternatively, the leak control system of the air preheater in the embodiment of the present application can be used for controlling thermal power plant's revolution
Regenerative air heater.Specifically, the widely used air preheater of station boiler has two kinds of tubular type and swinging.Swinging air
Preheater transmits heat with regeneration, and flue gas alternately passes through heating surface with air.When flue gas flows through, heat is passed to from flue gas
Heating surface, heating surface temperature is raised, and puts aside heat；When air is again passed through, heating surface puts the heat of savings to air.
Alternatively, the Air leakage control cabinet can be controlled by integrated circuit to air preheater, it is also possible to by can
Programmed logic controller is controlled to air preheater.Specifically, programmable logic controller (PLC) (Programmable Logic
Controller, abbreviation PLC) it is a kind of using a class programmable memory, for its internally stored program, execution logic fortune
The user oriented instructions such as calculation, sequential control, timing, counting and arithmetical operation, and by numeral or analog pattern input/output control
The various types of machineries of system or production process.
Alternatively, generally using mechanical probe or current vortex sensor direct detection seal clearance, this Shen in prior art
Seal clearance please be detected using a kind of indirectly mode, under the deformation quantity and fanning strip of rotor of air preheater is detected first
Displacement is put, and then by calculating the deformation quantity of the rotor and the decentralization displacement of fanning strip, so as to obtain accurate seal clearance, is needed
It is noted that the deformation quantity of the rotor is produced by the thermal deformation of rotor.Therefore, the mode of seal clearance is obtained in the application
Accuracy is higher, testing cost is lower, can be widely applied to industry spot.
Alternatively, the Air leakage control cabinet can include：Computing circuit, respectively with rotor deformation detection means and displacement detecting
Device connects, for obtaining the seal clearance value of air preheater according to the decentralization displacement of the deformation quantity of rotor and fanning strip；The
One control circuit, is connected with computing circuit, for according to the seal clearance value of air preheater and default seal clearance value scope
Generate the first control signal.
Specifically, multiple circuit comparators can be provided with first control circuit, for the seal clearance value and in advance
If the maximum in seal clearance value scope is compared, or for the seal clearance value and default seal clearance value scope
In minimum of a value be compared, so as to according to above-mentioned comparative result generate the first control signal.
Alternatively, the system can also include：Local control device, connects respectively with fanning strip lowering or hoisting gear and control circuit
Connect, for controlling the operation of fanning strip lowering or hoisting gear according to the first control signal.Specifically, local control device is alternatively referred to as on the spot
Operation device, it can possess independent computer disposal and control function, and it independently can be carried out to fanning strip lowering or hoisting gear
Control, it is also possible to coordinate Air leakage control cabinet to jointly control fanning strip lowering or hoisting gear, the control priority that jointly controls or
Control sequence can artificially pre-set, and the application here is not limited.Local control device can be according to the first control signal
The lowering or hoisting gear operation of control fanning strip, so as to the seal clearance of air preheater is maintained within preset range, realizes optimal
Hot junction radial seal gap.
Alternatively, the system can also include：Motor detection apparatus, connect respectively with air preheater and Air leakage control cabinet
Connect, for detecting the current value and tachometer value of the motor of air preheater.
Alternatively, the Air leakage control cabinet can also include：First decision circuitry, is connected with motor detection apparatus, for sentencing
The current value of disconnected motor whether within the scope of pre-set current value, so as to generate the first judged result；Second decision circuitry,
It is connected with motor detection apparatus, for judging the tachometer value of motor whether within the scope of preset rotation speed value, so as to generate
Second judged result；Second control circuit, is connected respectively with the first decision circuitry and the second decision circuitry, for sentencing according to first
Disconnected result or the second judged result generate the second control signal, wherein, the second control signal is used to indicate local control device control
Fanning strip lowering or hoisting gear processed carries out emergency lifting operation to fanning strip.
Specifically, when air preheater motor current anomaly or during rotating speed abnormal, by carrying out to fanning strip
Emergency lifting is operated, and can ensure the security of the leak control system of air preheater, and the failure for reducing air preheater is sent out
Raw rate, extends the service life of air preheater.
Alternatively, rotor deformation detection means is laser sensor or temperature sensor.
Specifically, laser sensor is arranged at the hot junction face truss of air preheater, and is directed at rotor by being oriented to steel pipe
Angle steel.Temperature sensor is arranged at the air inlet of air preheater and gas outlet, it should be noted that the air inlet can be cigarette
The air inlet of gas and/or air, the gas outlet can be the gas outlet of flue gas and/or air.
Specifically, laser sensor is the sensor measured using laser technology.It is by laser instrument, laser detector
With measuring circuit composition.Laser sensor is new type measuring instrument table, it possess contactless telemeasurement, speed fast, high precision,
The advantages of range is big, anti-light, electrical interference ability is strong, laser sensor can be with the deformation of the rotor of direct detection air preheater
Amount.Temperature sensor (temperature transducer) refers to the sensing that can be experienced temperature and be converted into usable output signal
Device.Temperature sensor is the core of temperature measuring instrument, various in style, and it can be divided into contact and non-connect by metering system
The big class of touch two, according to sensor material and electron component characteristic thermal resistance and the class of thermocouple two are divided into.
It should be noted that the rotor deformation detection means in the application is without the need for being installed in advance the interior of air preheater
Portion, its is with low cost, simple to operate and detection efficiency is higher, such that it is able to overcome tradition machinery probe or current vortex sensor to need
Be installed on inside air preheater, work under bad environment, service life are short, cannot on-line maintenance the shortcomings of change, therefore, the application
In rotor deformation detection means be more suitable for industry spot.
Alternatively, rotor deformation detection means is connected with the hot junction face of air preheater.
Alternatively, the system can also include：External AC power supply, is connected, for Air leakage control with Air leakage control cabinet
Cabinet is powered.Specifically, the external AC power supply can be able to be 220V for rated voltage, and rated current is 10A, rated frequency is
The AC power of 50Hz.
Alternatively, the fanning strip lowering or hoisting gear is screw-threaded shaft elevator.Screw-threaded shaft elevator has compact conformation, small volume, weight
Amount is light, power source is extensive, noise is little, easy for installation, use is flexible, function is more, kit form is more, reliability is high, service life
Long the advantages of.It can exactly be controlled to adjust the height for being lifted or being advanced by certain procedures, it is also possible to motor or other are dynamic
Power directly drives, can also be manually.The heres such as structural shape, assembling mode, gearratio, the hoisting depth of the screw-threaded shaft elevator are not
It is limited, the screw-threaded shaft elevator can also possess auto-lock function.
Alternatively, reductor is provided with the screw-threaded shaft elevator, for when screw-threaded shaft elevator runs, to screw-threaded shaft elevator
Carry out deceleration-operation.Specifically, reductor plays matching rotating speed and transmission torque between prime mover and working machine or executing agency
Effect, reductor is a kind of relatively accurate machinery, the use of its purpose is to reduce rotating speed, increases torque.
Alternatively, Fig. 2 is the leak control system of the optional air preheater of another kind according to embodiments of the present invention
Structural representation, as shown in Fig. 2 the Air leakage control cabinet 20 can simultaneously control one or more air preheater (skies in Fig. 2
Air preheater 201 and air preheater 202), each air preheater is equipped with a set of independent detection means and control device,
Wherein, detection means includes displacement detector 203, laser sensor 204, temperature sensor 205 etc., and control device is included just
Ground control device 206 and fanning strip lowering or hoisting gear 207 etc..Can have on the Air leakage control cabinet and local control device instrument board,
The parts such as indicator lamp, button, for realize the current operating state of the leak control system show, alerted, instruction input
Etc. function.
Alternatively, in embodiments of the present invention, the leak control system of above-mentioned air preheater is detected by rotor deformation
The deformation quantity of the rotor of device detection air preheater, and the fanning strip of air preheater is detected by displacement detector
Decentralization displacement, and then it is pre- to obtain the air according to the deformation quantity of the rotor and the decentralization displacement of the fanning strip by Air leakage control cabinet
The seal clearance value of hot device, has reached the purpose according to the seal clearance value control fanning strip lowering or hoisting gear operation, so as to realize
The technique effect of the control efficiency of the leak control system of air preheater is lifted, is also achieved effective to air preheater
The air leak rate of air curtain of air preheater is reduced on the premise of control and the technique effect of its efficiency of combustion is improved, and then is solved existing
Control accuracy that the leak control system of the air preheater in technology is present it is relatively low, fragile and cannot on-line maintenance skill
Art problem.
Embodiment 2
According to embodiments of the present invention, there is provided the embodiment of a kind of Air leakage control method of air preheater, explanation is needed
, can hold in the such as computer system of one group of computer executable instructions the step of the flow process of accompanying drawing is illustrated
OK, and, although show logical order in flow charts, but in some cases, can be with different from order herein
Perform shown or described step.
Fig. 3 is a kind of schematic flow sheet of the Air leakage control method of air preheater according to embodiments of the present invention, such as Fig. 3
Shown, the method comprises the steps：
Step S302, detects the decentralization displacement of the fanning strip of the deformation quantity and air preheater of the rotor of air preheater；
Step S304, according to the deformation quantity of rotor and the decentralization displacement of fanning strip the seal clearance of air preheater is calculated
Value；
Step S306, according to seal clearance value the operation of fanning strip lowering or hoisting gear is controlled, wherein, fanning strip lowering or hoisting gear is used for
Descending operation is carried out to the fanning strip of air preheater.
Alternatively, in embodiments of the present invention, the leak control system of above-mentioned air preheater is detected by rotor deformation
The deformation quantity of the rotor of device detection air preheater, and the fanning strip of air preheater is detected by displacement detector
Decentralization displacement, and then it is pre- to obtain the air according to the deformation quantity of the rotor and the decentralization displacement of the fanning strip by Air leakage control cabinet
The seal clearance value of hot device, has reached the purpose according to the seal clearance value control fanning strip lowering or hoisting gear operation, so as to realize
The technique effect of the control efficiency of the leak control system of air preheater is lifted, is also achieved effective to air preheater
The air leak rate of air curtain of air preheater is reduced on the premise of control and the technique effect of its efficiency of combustion is improved, and then is solved existing
Control accuracy that the leak control system of the air preheater in technology is present it is relatively low, fragile and cannot on-line maintenance skill
Art problem.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
In the above embodiment of the present invention, the description to each embodiment all emphasizes particularly on different fields, and does not have in certain embodiment
The part of detailed description, may refer to the associated description of other embodiment.
In several embodiments provided herein, it should be understood that disclosed technology contents, can pass through other
Mode is realized.Wherein, device embodiment described above is only schematic, such as the division of described unit, Ke Yiwei
A kind of division of logic function, can there is an other dividing mode when actually realizing, such as multiple units or component can with reference to or
Person is desirably integrated into another system, or some features can be ignored, or does not perform.Another, shown or discussed is mutual
Between coupling or direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some interfaces, unit or module
Connect, can be electrical or other forms.
The unit as separating component explanation can be or may not be it is physically separate, it is aobvious as unit
The part for showing can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On unit.Some or all of unit therein can according to the actual needs be selected to realize the purpose of this embodiment scheme.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to which two or more units are integrated in a unit.Above-mentioned integrated list
Unit both can be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.
If the integrated unit is realized using in the form of SFU software functional unit and as independent production marketing or used
When, during a computer read/write memory medium can be stored in.Based on such understanding, technical scheme is substantially
The part for contributing to prior art in other words or all or part of the technical scheme can be in the form of software products
Embody, the computer software product is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or network equipment etc.) perform the whole of each embodiment methods described of the invention or
Part steps.And aforesaid storage medium includes：USB flash disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), portable hard drive, magnetic disc or CD etc. are various can be with store program codes
Medium.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of leak control system of air preheater, it is characterised in that include：
Rotor deformation detection means, is connected with air preheater, for detecting the deformation quantity of the rotor of the air preheater；
Fanning strip lowering or hoisting gear, is connected with the air preheater, for lifting to the fanning strip of the air preheater
Operation；
Displacement detector, is connected with the fanning strip lowering or hoisting gear, for detecting the decentralization displacement of the fanning strip；
Air leakage control cabinet, fills respectively with the rotor deformation detection means, the fanning strip lowering or hoisting gear and the displacement detecting
Connection is put, for obtaining the sealing of the air preheater according to the decentralization displacement of the deformation quantity of the rotor and the fanning strip
Gap width, and the fanning strip lowering or hoisting gear operation is controlled according to the seal clearance value.
2. the leak control system of air preheater according to claim 1, it is characterised in that the Air leakage control cabinet bag
Include：
Computing circuit, is connected respectively, for according to described turn with the rotor deformation detection means and institute's displacement sensing device
The deformation quantity of son and the decentralization displacement of the fanning strip obtain the seal clearance value of the air preheater；
First control circuit, is connected with the computing circuit, for according to the seal clearance value of the air preheater and default
Seal clearance value scope generates the first control signal.
3. the leak control system of air preheater according to claim 2, it is characterised in that the system also includes：
Local control device, is connected respectively, for according to described first with the fanning strip lowering or hoisting gear and the control circuit
Control signal controls the fanning strip lowering or hoisting gear operation.
4. the leak control system of air preheater according to claim 3, it is characterised in that the system also includes：
Motor detection apparatus, are connected respectively with the air preheater and the Air leakage control cabinet, pre- for detecting the air
The current value and tachometer value of the motor of hot device.
5. the leak control system of air preheater according to claim 4, it is characterised in that the Air leakage control cabinet is also
Including：
Whether the first decision circuitry, is connected with the motor detection apparatus, for judging the current value of the motor pre-
If within current value range, so as to generate the first judged result；
Whether the second decision circuitry, is connected with the motor detection apparatus, for judging the tachometer value of the motor pre-
If within tacho value range, so as to generate the second judged result；
Second control circuit, is connected respectively with first decision circuitry and second decision circuitry, for according to described
One judged result or second judged result generate the second control signal, wherein, second control signal is used to indicate institute
State the local control device control fanning strip lowering or hoisting gear carries out emergency lifting operation to the fanning strip.
6. the leak control system of air preheater according to claim 1, it is characterised in that the rotor deformation detection
Device is laser sensor or temperature sensor.
7. the leak control system of air preheater according to claim 6, it is characterised in that the laser sensor sets
The hot junction face truss of the air preheater is placed in, the temperature sensor is arranged at the air inlet of the air preheater and goes out
Gas port.
8. the leak control system of air preheater according to claim 1, it is characterised in that the rotor deformation detection
Device is connected with the hot junction face of the air preheater.
9. the leak control system of air preheater according to claim 1, it is characterised in that the fanning strip lifting dress
It is set to screw-threaded shaft elevator.
10. the leak control system of air preheater according to claim 9, it is characterised in that the screw-threaded shaft elevator
On be provided with reductor, for when the screw-threaded shaft elevator runs, to the screw-threaded shaft elevator deceleration-operation being carried out.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611265785.0A CN106594789A (en) | 2016-12-30 | 2016-12-30 | Air leakage control system of air preheater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611265785.0A CN106594789A (en) | 2016-12-30 | 2016-12-30 | Air leakage control system of air preheater |
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| CN106594789A true CN106594789A (en) | 2017-04-26 |
Family
ID=58581851
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611265785.0A Pending CN106594789A (en) | 2016-12-30 | 2016-12-30 | Air leakage control system of air preheater |
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| CN108019771A (en) * | 2017-10-13 | 2018-05-11 | 南京博沃科技发展有限公司 | It is a kind of that the air preheater directly to leak out is reduced using rotor rolling action |
| CN109084666A (en) * | 2017-06-13 | 2018-12-25 | 山西昌德大成科技有限公司 | Vouch instrument in the hot gap of leaking out of air preheater |
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