CN106949457A - A kind of super critical boiler pendant superheater overtemperture control system and method - Google Patents
A kind of super critical boiler pendant superheater overtemperture control system and method Download PDFInfo
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- CN106949457A CN106949457A CN201710326532.8A CN201710326532A CN106949457A CN 106949457 A CN106949457 A CN 106949457A CN 201710326532 A CN201710326532 A CN 201710326532A CN 106949457 A CN106949457 A CN 106949457A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G5/00—Controlling superheat temperature
- F22G5/20—Controlling superheat temperature by combined controlling procedures
Abstract
A kind of super critical boiler pendant superheater overtemperture control system and method, the system includes wall temperature sensor, the In situ Measurement device for receiving wall temperature sensor signal, the power station distributed monitoring control system being connected with the progress communication of In situ Measurement device, the first order monitoring loop being monitored to each wall temperature sensor and second level monitoring loop that are connected with In situ Measurement device, the after-flame windshield plate being connected with first order monitoring loop controlled by power station distributed monitoring control system and the desuperheat water spray pitch being connected with second level monitoring loop being installed on pendant superheater tube wall；The first order monitoring loop includes one-level speed limit module, one-level clipping module, one-level or computing module, one-level output pulse module, and second level monitoring loop includes two grades of speed limit modules, two grades of clipping modules, two grades or computing module, two grades of output pulse modules；The invention also discloses the control method of the system；System and method of the present invention extend the key equipment life-span to the operational reliability of raising thermal power plant, and reduction maintenance and repair cost all has great importance.
Description
Technical field
The present invention relates to thermal power station's automatic control technology field, and in particular to a kind of super critical boiler pendant superheater overtemperature
Control system and method.
Background technology
From the nineties in last century, China has successively introduced a collection of supercritical unit from the U.S., Russia, Japan, and by
Main body of the step as the high-power fired power generating unit of China, to the end of the year 2011, China turns into the most country of ultra supercritical coal-fired unit,
Also indicate that China's power industry enters " ultra supercritical epoch ".However, super (super-) critical unit is high because of its carbonated drink parameter, more
Close to the acceptability limit of material, easily cause boiler combustion unstable or dynamic heat flux in the transients such as Fast variable operating condition
That measures is unbalance, causes the overtemperature of high-temperature surface, causes major accident and the problems such as a large amount of boiler heating surface boosters, gives electric power life
Production safety and stability brings significant impact, a great problem as puzzlement power industry：
First, the Temperature of Working and pressure in super critical boiler pendant superheater are very high, and are arranged in furnace outlet gas temperature
Highest region, while receive burning radiation heat exchange and the high-temperature flue gas heat convection in burner hearth, condition of work very severe, by
Hot facial canal wall temperature approaches the ultimate-use (limiting service) temperature of metal material, and metal pipe-wall surpasses easily caused by system disturbance or working conditions change
Temperature, threatens equipment safety.
Second, although pendant superheater outlet steam temperature after steam temperature regulation and cross-mixing by keeping under normal operating conditions
Average outlet steam temperature is especially being moved in nominal, but because burner hearth cigarette temperature is distributed the skewness with heating surface Bottomhole pressure
During state, there is deviation in the pipe inside and outside parameter in local heating face, the hot-spot of heating surface is easily caused under certain condition
Overtemperature, or even cause accelerated oxidation and booster.
3rd, the running environment of fired power generating unit causes China's fired power generating unit generally existing coal under domestic electrical market
The fluctuation of matter and the frequent significantly frequency modulation peak regulation of grid requirements, these all exacerbate the difficulty of super critical boiler regulation control
Degree, a large amount of field experiences show that wall temperature overtemperature is above-mentioned in addition to design and installation condition based on the short-term over-temperature of dynamic process
Factor is to cause the most immediate cause of heating surface tube wall temperature overtemperature.
4th, with the raising that domestic power plant payes attention to super critical boiler wall temperature overtemperature, generally set up substantial amounts of wall temperature prison
Survey measuring point, the wall temperature measurement point that part of generating units is installed reaches thousands of, but is only capable of realizing the post-event alarm of overtemperature substantially, it is impossible to realize
Effective analysis and processing in real time to such a large amount of wall temperature measurement points, realize overheating warning and prevention, there is no and effectively automatically control
Means can be used.
The presently relevant state of the art is as follows：
1. wall temperature monitoring technology present situation
At present, super (super-) critical boiler wall temperature monitoring mainly has three kinds of technologies：
(1) direct measuring
There is very big difficulty in boiler internal wall temperature measurement, typically by armoured thermocouple or the electric welding of porcelain bushing shell thermocouple arrive by
The method of hot face metal pipe-wall measures wall temperature, but because dust-laden high-temperature flue gas is washed away, heating surface is swung and heating surface screen in stove
The reason such as area's flue-gas temperature is higher, these installation requirements for surveying node pair contact effects are higher so as to which measurement accuracy is relatively low, dislike simultaneously
Bad environment causes measuring point to be easily damaged.In super (super-) critical Boiler Furnace wall temperature measurement compared with subcritical boiler due to its carbonated drink
Parameter is higher, and measurement and maintenance difficulties are bigger.
Due to problem above, directly measuring point is being installed and based on this to fiery side pipe wall emphasis or these dangerous spots of fin end
A little measuring points carry out long term monitoring and control reliability is relatively low, also therefore, and existing direct wall temperature measurement only supplies alarm, then by transporting
Administrative staff carries out correlated judgment and disposal.
(2) indirect method of measurement
The boiler wall temperature indirect method of measurement power plant using it is more be tube wall oxidated layer thickness method, this method has
Quantitative accurately and fast lossless the advantages of, but need to carry out accurate measurement to tube wall oxidated layer thickness during blowing out, enter
And extrapolate the average level and APPROXIMATE DISTRIBUTION of boiler wall temperature.The limitation of this kind of method be also it is fairly obvious, first can not profit
Online real-time monitoring is carried out with this method, the on-line early warning and overtemperature prevention to super (super-) critical boiler have little significance；Secondly,
The careful tube wall oxidated layer thickness measurement of this method heavy dependence, complexity and expense are all very high.
(3) online soft sensor method
So-called hard measurement is exactly, according to predetermined model, by other parameters, to be calculated according to model algorithm tested
The method of parameter objectives.With the development of computer technology, for measurable variable or not being difficult to accurate measurement in production process and becoming
The measurement of amount and its implementation sex chromosome mosaicism, soft-measuring technique embody the advantage of uniqueness.The key problem of hard measurement is its model
Set up, namely the correlation model set up between variable to be estimated and other direct measurement variables.
The method of soft sensor modeling is varied, and various method mutuals are intersected and merged, therefore is difficult to have appropriate and complete
The sorting technique in face.At present, soft-measuring modeling method is generally comprised：Modelling by mechanism, regression analysis, state estimation, pattern-recognition,
Artificial neural network, fuzzy mathematics, SVMs, process chromatography, correlation analysis, nonlinear system information processing technology etc..
Soft-measuring technique based on these methods has respective advantage and disadvantage and the scope of application, and Part Methods have been permitted in hard measurement field
Many successfully applications, but in terms of boiler wall temperature hard measurement in addition to the conventional method such as modelling by mechanism and regression analysis, it is most of still
It is immature.
2. the wall temperature prediction and warning state of the art
Current overtemperature is mainly monitored and alarmed using a large amount of temperature probes being installed on high-temperature surface, and wall temperature is surveyed
Measure result and exceed default high alarm setting, that is, give operations staff's alarm, related disposal is carried out by operations staff.But ask at present
Topic is such substantial amounts of wall temperature measurement point, it is difficult to by artificial effectively analyze and monitor, can only accomplish the report after overtemperature
Alert disposal, it is difficult to realize the prediction and early warning of overtemperature, there is no method effectively to utilize a large amount of wall temperature measurement points, realizes the effective of wall temperature overtemperature
Alleviate and prevent.
In summary, based on station boiler pendant superheater wall temperature measurement point, its wall temperature overtemperture control system and method is developed,
The generation of the problems such as to improving the security and high-temperature heating component life of boiler plant, reducing overtemperature or even booster or accident is all
With important effect.
The content of the invention
In order to solve the problem of above-mentioned prior art is present, it is an object of the invention to provide a kind of super critical boiler screen formula
Superheater over temperature control system and method, the operational reliability to improving thermal power plant, extend the key equipment life-span, and dimension is safeguarded in reduction
Accomplish this all to have great importance.
To achieve the above objectives, the present invention is adopted the following technical scheme that：
A kind of super critical boiler pendant superheater overtemperture control system, including the wall being installed on the tube wall of pendant superheater 1
Temperature sensor 2, the In situ Measurement device 3 for receiving the signal of wall temperature sensor 2, the electricity being connected with the progress communication of In situ Measurement device 3
Stand distributed monitoring control system 4, being monitored back to the first order that each wall temperature sensor 2 is monitored of being connected with In situ Measurement device 3
Road and second level monitoring loop, the burnout degree being connected with first order monitoring loop controlled by power station distributed monitoring control system 4
Baffle plate 13 and the desuperheat water spray pitch 14 being connected with second level monitoring loop；The first order monitoring loop includes one-level speed limit mould
Block 5, one-level clipping module 6, the one-level or computing module 7 and one-level being connected with one-level speed limit module 5 and one-level clipping module 6
Or the one-level that computing module 7 is connected exports pulse module 8, second level monitoring loop includes two grades of speed limit modules 9, two grades of amplitude limit moulds
Block 10, two grades be connected with two grades of speed limit modules 9 and two grades of clipping modules 10 or computing module 11 and two grades or computing module 11
Two grades of output pulse modules 12 of connection.
In situ Measurement device 3 detects the temperature measurement signal for the wall temperature sensor 2 for being installed on each metal pipe-wall of pendant superheater 1,
On the one hand by communication modes by the temperature of each wall temperature sensor 2 be sent to power station distributed monitoring control system 4 be used for show with
Alarm after overtemperature appearance；On the other hand one-level speed limit module 5, one-level clipping module 6, two grades of speed limit modules 9, two grades of limits are passed through
The output of each wall temperature sensor 2 of 10 pairs of width module is detected.
The pendant superheater 1 is located at super critical boiler roof of the furnace, is made up of some elongated metal tubes spiraled.Screen
The metal Bottomhole pressure of formula superheater 1 is superheated steam, the outer hybrid MTDC for receiving high-temperature flue gas and burnout degree of pipe with
And in burner hearth combustion flame radiation heat transfer, so as to realize the heating to superheated steam.When super critical boiler operating mode changes
When, there is imbalance in the outside heat and the heat of over-heat inside vapor absorption that pendant superheater 1 is received, cause pendant superheater
The change of 1 metal pipe-wall temperature, until reaching after new equilibrium state, the metal pipe-wall temperature of pendant superheater 1 tends to be new and put down
Weighing apparatus point.Steam flowing inequality in fluctuation of operating conditions, the outer flue-gas temperature of pipe and flow distribution inequality and (or) pipe when the dynamic process
Even to generate after larger imbalance, pendant superheater 1 is possible to occur under indivedual or local tube wall temperature overtemperature, serious conditions
It is likely to occur large area overtemperature of tube wall.Under the conditions of prior art, when the wall temperature sensor 2 being installed on the tube wall of pendant superheater 1
Institute's installation place tube wall temperature exceedes after the corresponding overtemperature alarm value of material, and the DCS system 4 being connected with In situ Measurement device 3 can root
The prompting of wall temperature overtemperature alarm is sent after being compared according to each wall temperature sensor signal and overtemperature alarm value, to point out at operations staff
Reason.
A kind of super critical boiler pendant superheater overtemperture control system and method for the present invention is installed to pendant superheater 1 automatically
The output signals of a large amount of wall temperature sensors 2 monitored automatically.Monitoring loop is divided into two-stage, and Two monitor levels loop passes through respectively
One-level speed limit module 5 and two grades of speed limit modules 9 and one-level clipping module 6 and two grades of clipping modules 10 capture a large amount of wall temperature sensors
Maximum temperature and most fast programming rate in 2, when the output temperature or programming rate of any wall temperature sensor 2 exceed at different levels set
Amplitude limit exported by one-level or computing module 7 and two grades or computing module 11 to one-level level pulse output module 8 and secondary vein
The generation control instruction signal increment of output module 12 is rushed, cooling control is carried out；Wherein because after-flame air quantity is to pendant superheater 1
Wall temperature influence is relatively slight, and the influence to generating set system run all right and economy is also milder, comparatively, desuperheat spray
Wall temperature change and the influence of generating set system run all right and economy of the change of water to pendant superheater 1 are brighter
Aobvious, therefore, the amplitude limit amplitude that one-level monitoring loop is set is relatively low, and control output is superimposed in the control instruction of after-flame windshield plate 13,
The cooling of pendant superheater 1 is carried out by increasing combustion engine air quantity；The amplitude limit amplitude that two grades of monitoring loops are set is higher, control output
It is superimposed on desuperheat water spray pitch 14, by increasing desuperheat injection flow rate, carries out the cooling of pendant superheater 1；Slighter overtemperature
Risk can trigger one-level monitoring loop, and the control of pendant superheater overtemperature, more serious overtemperature are realized by increasing combustion engine air quantity
Risk can trigger firsts and seconds monitoring loop simultaneously, by increasing combustion engine air quantity and desuperheat injection flow rate, and screen formula mistake is realized jointly
The control of hot device overtemperature；So can be before there is overtemperature in pendant superheater 1, the risk of overtemperature, comprehensive profit occur for automatic anticipation
With the mode of increase combustion engine air quantity and desuperheat injection flow rate, realize that the target of overtemperature risk was shielded in actively reduction, so as to avoid shielding
The generation of overtemperature, safeguards the safety of the metal tube of pendant superheater 1.
Compared with prior art, the features of the present invention is as follows：
(1) prior art can not realize effective monitoring pipe to a large amount of wall temperature measurement points being installed on boiler platen superheater
Reason, can only realize the alarm after wall temperature overtemperature, operations staff is only capable of making and responded afterwards, it is impossible to have energy to carry out wall temperature complete
Face is monitored.
(2) on the basis of existing thermal power station's system hardware structure, transformed without complicated hardware device, only need to increase one-level
It is that the monitoring and control to boiler platen superheater wall temperature can be achieved with two grades of monitoring loops, realizes that effectively reduction was shielded wall temperature and surpassed
The purpose of warm air danger.
(3) control that prior art is used to burn using after-flame damper, opens big after-flame air door and can be used for reducing completely
Full combustible loss, reduces unburned carbon in flue dust, reduction NOx generations, but excessive burnout degree can reduce efficiency of combustion.The present invention is sentencing
It is disconnected when there is overtemperature risk, by low temperature after-flame wind action in the short time, the purpose that wall temperature was shielded in auxiliary reduction is realized, is entered
One step enriches the automatic control function of after-flame windshield plate.
(4) prior art is sprayed water in emergency circumstances reducing the temperature of superheated steam in superheater using superheater desuperheat
Degree, it is to avoid over-temp and over-pressure occurs in superheated steam, threatens the safety of superheater.The present invention is when judging overtemperature risk occur, in short-term
The interior cooling effect sprayed water by desuperheat, realizes the purpose that wall temperature was shielded in auxiliary reduction, further enriches boiler overheating
The automatic control function of device desuperheat water spray.
(5) because burnout degree effect is relatively gentle, and smaller is influenceed on unit efficiency, therefore is used as the normal of overtemperature risk control
Rule means；And the effect of desuperheat water spray is relatively strong and influences larger to unit efficiency, thus as overtemperature risk it is stronger when use simultaneously.
Influence to unit safety stability and economy can be taken into account simultaneously by two-step evolution effect, realize and surpass to easily occurring wall temperature
Temperature pendant superheater overtemperature automatic protection, the screen faced to supercritical unit wall temperature overtemperatute solution have it is important
Meaning.
Brief description of the drawings
Fig. 1 is present system structural representation.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
A kind of super critical boiler pendant superheater overtemperture control system, including the wall being installed on the tube wall of pendant superheater 1
Temperature sensor 2, the In situ Measurement device 3 for receiving the signal of wall temperature sensor 2, the electricity being connected with the progress communication of In situ Measurement device 3
Stand distributed monitoring control system 4, the one-level speed limit module 5 being monitored to each wall temperature sensor 2, one-level clipping module 6, one-level
Or computing module 7, one-level output pulse module 8, two grades of speed limit modules 9, two grades of clipping modules 10, two grades or computing module 11,
Two grades export pulse module 12, the after-flame windshield plate 13 controlled by power station distributed monitoring control system 4 and desuperheat water spray pitch 14.
In each metal pipe-wall temperature changing process of pendant superheater 1, the detection of In situ Measurement device 3 is installed on pendant superheater
The temperature measurement signal of the wall temperature sensor 2 of 1 each metal pipe-wall, is on the one hand sent out the temperature of each wall temperature sensor 2 by communication modes
Give DCS system 4 be used for show and overtemperature appearance after alarm；On the other hand one-level speed limit module 5, one-level clipping module are passed through
6th, two grades of speed limit modules 9, outputs of two grades of each wall temperature sensors 2 of 10 pairs of clipping module are detected.
When overtemperature, but the lower limit that more than one time clipping module 6 is set not yet occurs in the temperature of any wall temperature sensor 2
The rate of temperature change of such as 495 DEG C of amplitude or any wall temperature sensor 2 exceedes the relatively low speed limit such as 10 that one-level speed limit module 5 is set
DEG C/min when, one-level or computing module 7 are output as very, and trigger the one-level in power station distributed monitoring control system 4 output pulse mode
Block 8, is superimposed the cooling control arteries and veins that one-level output pulse module 8 is exported on the basis of the original control instruction of after-flame windshield plate 13
Punching, controls the after-flame windshield plate 13 being connected with power station distributed monitoring control system 4 further to open the after-flame for improving roof of the furnace greatly
Wind flow, so as to reduce the flue-gas temperature for flowing through pendant superheater 1, alleviates and even avoids pendant superheater 1 from overtemperature occur.
When the temperature of any wall temperature sensor 2 is further raised, though not yet there is overtemperature, exceed iterative double clipping module 10
What higher such as 500 DEG C of the amplitude of limitation or more than two grades speed limit modules 9 of rate of temperature change of any wall temperature sensor 2 set was set
During higher speed limit such as 20 DEG C/min, two grades or computing module 11 are output as very, and are triggered in power station distributed monitoring control system 4
Two grades output pulse modules 12, desuperheat water spray the original control instruction of pitch 14 on the basis of superposition two grades output pulse modules
The cooling control pulse of 12 outputs, controls the desuperheat being connected with power station distributed monitoring control system 4 water spray pitch 14 further to open
Greatly, increase enters the desuperheat water spray of pendant superheater 1, so that the quickly superheat steam temperature in reduction pendant superheater 1, quickly
Alleviate and even avoid pendant superheater 1 from overtemperature occur.
Claims (5)
1. a kind of super critical boiler pendant superheater overtemperture control system, it is characterised in that：Including being installed on pendant superheater (1)
The In situ Measurement device (3) and In situ Measurement device of wall temperature sensor (2), reception wall temperature sensor (2) signal on tube wall
(3) carry out communication connection power station distributed monitoring control system (4), be connected with In situ Measurement device (3) to each wall temperature sensor
(2) first order monitoring loop and second level monitoring loop that are monitored, controlled by power station distributed monitoring control system (4) with
The after-flame windshield plate (13) of first order monitoring loop connection and the desuperheat water spray pitch (14) being connected with second level monitoring loop；Institute
First order monitoring loop is stated to limit including one-level speed limit module (5), one-level clipping module (6), with one-level speed limit module (5) and one-level
The one-level or computing module (7) of width module (6) connection, the one-level output pulse module being connected with one-level or computing module (7)
(8), second level monitoring loop includes two grades of speed limit modules (9), two grades of clipping modules (10) and two grades of speed limit modules (9) and two
Two grades of level clipping module (10) connection or computing module (11), be connected with two grades or computing module (11) two grades export pulses
Module (12).
2. a kind of super critical boiler pendant superheater overtemperture control system according to claim 1, it is characterised in that：It is described
In situ Measurement device (3) detection is installed on the temperature measurement signal of the wall temperature sensor (2) of pendant superheater (1) each metal pipe-wall, one
Aspect by communication modes by the temperature of each wall temperature sensor (2) be sent to power station distributed monitoring control system (4) be used for show with
Alarm after overtemperature appearance；On the other hand by one-level speed limit module (5), one-level clipping module (6), two grades of speed limit modules (9),
Output of two grades of clipping modules (10) to each wall temperature sensor (2) is detected.
3. a kind of super critical boiler pendant superheater overtemperture control system according to claim 1, it is characterised in that：It is described
Pendant superheater (1) is located at super critical boiler roof of the furnace, is made up of some elongated metal tubes spiraled.
4. a kind of control method of super critical boiler pendant superheater overtemperture control system described in any one of claims 1 to 3,
It is characterized in that：The output signal of the automatic a large amount of wall temperature sensors (2) installed to pendant superheater (1) is monitored automatically,
Monitoring loop is divided into two-stage for first order monitoring loop and second level monitoring loop, and Two monitor levels loop passes through one-level speed limit respectively
Module (5) and two grades of speed limit modules (9) and one-level clipping module (6) and two grades of clipping modules (10) capture a large amount of wall temperature sensors
(2) maximum temperature and most fast programming rate in, when the output temperature or programming rate of any wall temperature sensor (2) are more than at different levels
The amplitude limit of setting is exported to one-level level pulse output module by one-level or computing module (7) and two grades or computing module (11)
(8) rush output module (12) with secondary vein and generate control instruction signal increment, carry out cooling control；Wherein due to after-flame air quantity pair
The wall temperature influence of pendant superheater (1) is relatively slight, and the influence to generating set system run all right and economy is also milder,
Comparatively, the change of desuperheat injection flow rate to the change of the wall temperature of pendant superheater (1) and generating set system run all right and
The influence of economy is more apparent, therefore, and the amplitude limit amplitude that one-level monitoring loop is set is relatively low, and control output is superimposed on after-flame windscreen
In plate (13) control instruction, the cooling of pendant superheater (1) is carried out by increasing combustion engine air quantity；The limit that two grades of monitoring loops are set
Width amplitude is higher, and control output is superimposed on desuperheat water spray pitch (14), by increasing desuperheat injection flow rate, carries out pendant superheater
(1) cooling；Slighter overtemperature risk can trigger one-level monitoring loop, realize that pendant superheater surpasses by increasing combustion engine air quantity
The control of temperature, more serious overtemperature risk can trigger firsts and seconds monitoring loop simultaneously, by increasing combustion engine air quantity and desuperheat
Injection flow rate, realizes the control of pendant superheater overtemperature jointly；It is automatic pre- before so can there is overtemperature in pendant superheater (1)
Sentence the mode of the risk for occurring overtemperature, comprehensive utilization increase combustion engine air quantity and desuperheat injection flow rate, realize that actively overtemperature was shielded in reduction
The target of risk, so as to avoid shielding the generation of overtemperature, safeguards the safety of pendant superheater (1) metal tube.
5. control method according to claim 4, it is characterised in that：Specific method is as follows：
When overtemperature, but the lower limit that more than one time clipping module (6) is set not yet occurs in the temperature of any wall temperature sensor (2)
The rate of temperature change of amplitude or any wall temperature sensor (2) exceed one-level speed limit module 5) set relatively low speed limit when, one-level
Or computing module (7) is output as very, and the output pulse module of the one-level in power station distributed monitoring control system 4 (8) is triggered, in combustion
The cooling control pulse of superposition one-level output pulse module (8) output to the greatest extent on the basis of windshield plate (13) original control instruction, control
Make the after-flame windshield plate (13) being connected with power station distributed monitoring control system (4) and further open the burnout degree for improving roof of the furnace greatly
Flow, so as to reduce the flue-gas temperature for flowing through pendant superheater (1), alleviates and even avoids pendant superheater (1) from overtemperature occur；
When any wall temperature sensor, (2 temperature is further raised, though not yet there is overtemperature, exceedes iterative double clipping module (10)
The higher limitation amplitude set or more than two grades speed limit modules (9) of rate of temperature change of any wall temperature sensor (2) set compared with
During high speed limit, two grades or computing module (11) are output as very, and two grades triggered in power station distributed monitoring control system (4) are defeated
Go out pulse module (12), two grades of output pulse modules (12) of superposition on the basis of desuperheat water spray pitch (14) original control instruction
The cooling control pulse of output, controls the desuperheat being connected with power station distributed monitoring control system (4) water spray pitch (14) further to open
Greatly, increase enters the desuperheat water spray of pendant superheater (1), so that the quickly superheat steam temperature in reduction pendant superheater (1),
Rapid recovery even avoids pendant superheater (1) from overtemperature occur.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173682A (en) * | 2019-06-18 | 2019-08-27 | 中国华能集团有限公司 | A kind of Gas-steam Combined Cycle high-pressure superheater overtemperture control system and method |
| CN113883492A (en) * | 2021-09-06 | 2022-01-04 | 河北国华沧东发电有限责任公司 | Boiler steam temperature control method and electronic equipment |
| CN114413247A (en) * | 2022-01-14 | 2022-04-29 | 西安热工研究院有限公司 | Boiler combustion heating surface overtemperature monitoring and active inhibition system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB559956A (en) * | 1941-10-10 | 1944-03-13 | Babcock & Wilcox Ltd | Improvements in attemperating apparatus for controlling the temperature of steam or other vapour |
| GB688282A (en) * | 1949-05-02 | 1953-03-04 | Vitkovice Zelezarny | Method of and plant for regulating the temperature of the superheated steam in steamboilers |
| US2966896A (en) * | 1958-03-12 | 1961-01-03 | Sulzer Ag | Method and apparatus for controlling the outlet temperatures of superheaters and reheaters of a steam generating plant |
| CN102494325A (en) * | 2011-12-19 | 2012-06-13 | 上海望特能源科技有限公司 | Method for monitoring intra-furnace dynamic wall temperature in high-temperature tube system of power station boiler |
| CN103277784A (en) * | 2013-05-23 | 2013-09-04 | 国家电网公司 | Supercritical coal-fired unit platen superheater metal wall temperature early-warning optimal control method |
| CN105090932A (en) * | 2014-07-08 | 2015-11-25 | 辽宁东科电力有限公司 | Superheater metal wall temperature control method for thermal power unit |
| CN106382615A (en) * | 2016-08-25 | 2017-02-08 | 西安西热控制技术有限公司 | Verification system and method for ultra-supercritical unit multi-time reheat steam temperature control strategy |
| CN106439770A (en) * | 2016-09-20 | 2017-02-22 | 广东电网有限责任公司电力科学研究院 | Control method for steam temperature of meager coal boiler of 1045MW ultra supercritical unit |
| CN206803122U (en) * | 2017-05-10 | 2017-12-26 | 西安西热控制技术有限公司 | A kind of super critical boiler pendant superheater overtemperture control system |
-
2017
- 2017-05-10 CN CN201710326532.8A patent/CN106949457B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB559956A (en) * | 1941-10-10 | 1944-03-13 | Babcock & Wilcox Ltd | Improvements in attemperating apparatus for controlling the temperature of steam or other vapour |
| GB688282A (en) * | 1949-05-02 | 1953-03-04 | Vitkovice Zelezarny | Method of and plant for regulating the temperature of the superheated steam in steamboilers |
| US2966896A (en) * | 1958-03-12 | 1961-01-03 | Sulzer Ag | Method and apparatus for controlling the outlet temperatures of superheaters and reheaters of a steam generating plant |
| CN102494325A (en) * | 2011-12-19 | 2012-06-13 | 上海望特能源科技有限公司 | Method for monitoring intra-furnace dynamic wall temperature in high-temperature tube system of power station boiler |
| CN103277784A (en) * | 2013-05-23 | 2013-09-04 | 国家电网公司 | Supercritical coal-fired unit platen superheater metal wall temperature early-warning optimal control method |
| CN105090932A (en) * | 2014-07-08 | 2015-11-25 | 辽宁东科电力有限公司 | Superheater metal wall temperature control method for thermal power unit |
| CN106382615A (en) * | 2016-08-25 | 2017-02-08 | 西安西热控制技术有限公司 | Verification system and method for ultra-supercritical unit multi-time reheat steam temperature control strategy |
| CN106439770A (en) * | 2016-09-20 | 2017-02-22 | 广东电网有限责任公司电力科学研究院 | Control method for steam temperature of meager coal boiler of 1045MW ultra supercritical unit |
| CN206803122U (en) * | 2017-05-10 | 2017-12-26 | 西安西热控制技术有限公司 | A kind of super critical boiler pendant superheater overtemperture control system |
Non-Patent Citations (1)
| Title |
|---|
| 方廷璋等: "600MW超临界机组汽温控制策略研究", 《电站系统工程》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173682A (en) * | 2019-06-18 | 2019-08-27 | 中国华能集团有限公司 | A kind of Gas-steam Combined Cycle high-pressure superheater overtemperture control system and method |
| CN113883492A (en) * | 2021-09-06 | 2022-01-04 | 河北国华沧东发电有限责任公司 | Boiler steam temperature control method and electronic equipment |
| CN113883492B (en) * | 2021-09-06 | 2024-02-09 | 国能河北沧东发电有限责任公司 | Boiler steam temperature control method and electronic equipment |
| CN114413247A (en) * | 2022-01-14 | 2022-04-29 | 西安热工研究院有限公司 | Boiler combustion heating surface overtemperature monitoring and active inhibition system |
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