CN109915812A - A kind of desuperheat water control system - Google Patents
A kind of desuperheat water control system Download PDFInfo
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- CN109915812A CN109915812A CN201910225847.2A CN201910225847A CN109915812A CN 109915812 A CN109915812 A CN 109915812A CN 201910225847 A CN201910225847 A CN 201910225847A CN 109915812 A CN109915812 A CN 109915812A
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Abstract
The present invention provides a kind of desuperheat water control systems, the control system includes controller and spray water flux regulating device, controller is connect with spray water flux regulating device, it is characterized in that, the controller receives the temperature field information in the burner hearth from boiler and generates feed-forward signal, controller is based on feed-forward signal control spray water flux regulating device makes boiler export keep stable vapor (steam) temperature to control the spray water flux into superheated steam system.The advantages of this method and system, is: the temperature of Stream temperature can be preferably controlled, so that the stability of Stream temperature is preferable, it is easily operated.
Description
Technical field
The present invention relates to a kind of control method and systems, in particular to a kind of desuperheat water control system.
Background technique
For coal-burning boiler, it is a kind of mode for guaranteeing boiler export steam stable, boiler that boiler, which sprays into desuperheating water,
Stream temperature adjustment process is that typically big delay thermal process, heated object are more appearances, Great inertia system, and controlled system exists tight
The non-linear and time-varying characteristics of weight；And there are many disturbance factor for influencing Stream temperature, such as unit load, flame central position etc. is given
Steam temperature adjusting brings many difficulties.
Be widely used in thermal power plant at present using Stream temperature as homophony, desuperheat water outlet temperature be it is secondary adjust, unit load as
The cas PID control strategy of feedforward, continuously significantly under the complex working condition of increasing and decreasing load, reason is often not achieved in main-stream control
Think effect, over control is serious, and operations staff is needed to intervene manually.Traditional adjusting method and regulating system is not able to satisfy existing
For the needs of thermal power plant, it will be gradually eliminated.
In summary, it is desirable to provide a kind of desuperheat water control system can overcome the deficiencies of existing technologies.
Summary of the invention
The present invention is intended to provide a kind of desuperheat water control system, can overcome the deficiencies of existing technologies.Hair of the invention
Improving eyesight is achieved by the following technical programs.
An embodiment of the invention provides a kind of desuperheat water control system, the control system include controller and
Spray water flux regulating device, controller are connect with spray water flux regulating device, and the controller receives in the burner hearth from boiler
Temperature field information and generate feed-forward signal, controller be based on feed-forward signal control spray water flux regulating device, thus control into
The spray water flux for entering superheated steam system makes boiler export keep stable vapor (steam) temperature.
The desuperheat water control system that said one embodiment according to the present invention provides, wherein the control system is also wrapped
Temperature sensor is included, temperature sensor is connect with controller, and the temperature sensor is for acquiring two neighboring moment Boiler Furnace
The temperature in temperature field and the controller is sent it in thorax.
The desuperheat water control system that said one embodiment according to the present invention provides, wherein the controller includes fortune
Circuit is calculated, the computing circuit obtains temperature variation based on the temperature in temperature field in the two neighboring moment boiler furnace.
The desuperheat water control system that said one embodiment according to the present invention provides, wherein the controller further includes
Circuit is received, circuit is received and is connect with computing circuit, the circuit that receives receives the described adjacent of the temperature sensor acquisition
The temperature in temperature field in two moment boiler furnaces.
The desuperheat water control system that said one embodiment according to the present invention provides, wherein the controller further includes
Control circuit, circuit are connect with computing circuit, and the control circuit is based on the temperature variation and generates the feed-forward signal.
The desuperheat water control system that said one embodiment according to the present invention provides, wherein the controller further includes
Transmitting line, transmitting line connect to the control circuit, and the feed-forward signal is sent to the spray water flux by the transmitting line
Regulating device.
The desuperheat water control system that said one embodiment according to the present invention provides, wherein the controller further includes
Alarm unit, alarm unit are connect with the controller, when the temperature in temperature field in the boiler furnace of temperature sensor acquisition is big
When preset threshold value, controller controls alarm unit and issues alarm signal.
The desuperheat water control system that said one embodiment according to the present invention provides, wherein the spray water flux is adjusted
Device is equipped with flow valve, and controller is connect with flow valve, and controller is based on the feed-forward signal and issues preset and feed-forward signal
The corresponding flow signal is to the flow valve, to control the spray water flux into superheated steam system.
The desuperheat water control system that said one embodiment according to the present invention provides, wherein the control system is also wrapped
Include the amplifying circuit connecting with the temperature sensor.
The desuperheat water control system that said one embodiment according to the present invention provides, wherein the temperature sensor is set
In the steam outlet of boiler, for measuring boiler export superheat steam temperature.
The advantages of desuperheat water control system is: the desuperheat water control system is capable of the temperature of preferable temperature Stream temperature
Degree, so that the stability of Stream temperature is preferable, it is easily operated.The adjusting of spray water flux can fast, easily be carried out.It is greatly improved
The convenience of operation.More meet demand in actual application.
Detailed description of the invention
Referring to attached drawing, the disclosure of the present invention will become more readily understood.Skilled addressee readily understands that: this
It is only used to illustrate the technical scheme of the present invention for a little attached drawings, and is not intended to limit the scope of protection of the present invention.
In figure:
Fig. 1 shows the block diagram of desuperheat water control system according to one embodiment of the present invention.
Fig. 2 shows the frames that the desuperheat water control system of one embodiment of the present invention as shown in Figure 1 is connect with boiler
Figure.
The steam that the temperature sensor that Fig. 3 shows one embodiment of the present invention as shown in Figure 1 is set to boiler goes out
Schematic view of the mounting position at mouthful.
Specific embodiment
Fig. 1-3 and following description describe optional embodiments of the invention to instruct how those skilled in the art implement
It is of the invention with reproducing.In order to teach the technical scheme of the invention, it has simplified or omitted some conventional aspects.Those skilled in the art
It should be understood that being originated from the variation or replacement of these embodiments will be within the scope of the present invention.Those skilled in the art answer
The following features can be combined in various ways to form multiple variations of the present invention for the understanding.As a result, the invention is not limited to
Following optional embodiments, and be only limited by the claims and their equivalents.
Fig. 1-2 shows the flow chart of desuperheat water control system according to one embodiment of the present invention, the control system
System includes controller 1 and spray water flux regulating device 2, and controller 1 is connect with spray water flux regulating device 2, and the controller 1 connects
It receives the temperature field information in the burner hearth from boiler A and generates feed-forward signal, controller 1 is based on feed-forward signal and controls spray water flux
Regulating device 2 makes so that control enters the spray water flux of superheated steam system B from water source C by spray water flux regulating device 2
Boiler export keeps stable vapor (steam) temperature.
The desuperheat water control system that said one embodiment according to the present invention provides, wherein the control system is also wrapped
Temperature sensor 3 is included, temperature sensor 3 is connect with controller 1, and the temperature sensor 3 is for acquiring two neighboring moment pot
The temperature in temperature field and the controller 1 is sent it in furnace burner hearth.
The desuperheat water control system that said one embodiment according to the present invention provides, wherein the controller 1 includes
Computing circuit 11, the computing circuit 11 show that temperature becomes based on the temperature in temperature field in the two neighboring moment boiler furnace
Change amount.
The desuperheat water control system that said one embodiment according to the present invention provides, wherein the controller 1 also wraps
It includes and receives circuit 12, receive circuit 12 and connect with computing circuit 11, the reception circuit 12 receives the temperature sensor 3 and acquires
The two neighboring moment boiler furnace in temperature field temperature.
The desuperheat water control system that said one embodiment according to the present invention provides, wherein the controller 1 also wraps
Include control circuit 13, circuit is connect with computing circuit 11, the control circuit 13 be based on the temperature variation generate it is described before
Feedback signal.
The desuperheat water control system that said one embodiment according to the present invention provides, wherein the controller 1 also wraps
Transmitting line 14 is included, transmitting line 14 is connect with control circuit 13, and the feed-forward signal is sent to institute by the transmitting line 14
State spray water flux regulating device 2.
The desuperheat water control system that said one embodiment according to the present invention provides, wherein the controller 1 also wraps
Alarm unit 4 is included, alarm unit 4 is connect with the controller 1, when temperature field in the boiler furnace that temperature sensor 3 acquires
When temperature is greater than preset threshold value, controller 1 controls alarm unit 4 and issues alarm signal.
The desuperheat water control system that said one embodiment according to the present invention provides, wherein the spray water flux is adjusted
Device 2 is equipped with flow valve 21, and controller 1 is connect with flow valve 21, and it is preset with before that controller 1 is based on feed-forward signal sending
The corresponding flow signal of feedback signal is to the flow valve 21, to control the spray water flux into superheated steam system B.
The desuperheat water control system that said one embodiment according to the present invention provides, wherein the control system is also wrapped
The amplifying circuit 5 connecting with the temperature sensor 3 is included, the amplifying circuit 5 is used to for the signal of temperature sensor being enlarged into
4-20 milliamperes of electric signal can be realized teletransmission data to controller.
The desuperheat water control system that said one embodiment according to the present invention provides, wherein the controller uses
The chip of XXXXXXX model.It the use of controller is DPUIII type, chip is: 500MHz Pentium class low power consumption CPU.
The steam that the temperature sensor 3 that Fig. 3 shows one embodiment of the present invention as shown in Figure 1 is set to boiler goes out
Schematic view of the mounting position at mouthful, the temperature sensor 3 is placed in the steam outlet D of boiler A, for measuring boiler export mistake
Hot steam temperature, the steam outlet D refer to below boiler furnace arch, furnace nose, the lower edge part of pendant superheater, and arrow indicates in Fig. 3
Working medium flow direction.
The desuperheat water control system that said one embodiment according to the present invention provides, the control circuit 13 are based on institute
It states temperature variation and generates the feed-forward signal, specifically, the temperature at t1 moment is T1, the temperature at t2 moment is T2, then two
The temperature difference Δ T=T2-T1 of a adjacent moment, then feed-forward signal=K × Δ T, K is to obtain parameter according to experiment.Specifically,
K and desuperheating water is altered in steps using iterative manner by combustion conditions in the typical condition for choosing boiler 100%, 75%, 50%
Amount of water sprayed (i.e. the open amount of spray water flux regulating device), for example, when outlet steam temperature dynamic deviation is less than 5%, it is static inclined
When difference is less than 2%, K at this time is determined as the Optimal Parameters after experiment.
It should be noted that Combustion Operation of Boilers, oxygen amount, air distribution, coal quality and static state and dynamic deviation can be according to need
It is configured, therefore K and desuperheating water amount of water sprayed will also change, and this is also within the scope of the present invention.
The advantages of desuperheat water control system is: the desuperheat water control system can preferably control the temperature of Stream temperature
Degree, so that the stability of Stream temperature is preferable, it is easily operated.The adjusting of spray water flux can fast, easily be carried out.It is greatly improved
The convenience of operation.More meet demand in actual application.
Although being done indeed, it will be appreciated that the description of front has been carried out in example through the invention to the present invention
Out will be apparent to those skilled in the science it is such and other improvement and change be deemed to fall such as set forth herein
Broad range of the present invention in.Therefore, although the present invention reference has been made to preferred embodiment and be described, meaning
It is not to be restricted the equipment for having novelty therefrom, on the contrary, it, which is intended to include, meets part disclosed above, claim
Broad range within various improvement and equivalent modifications.
Claims (10)
1. desuperheat water control system, the control system includes controller and spray water flux regulating device, controller and desuperheating water
Quantity regulating device connection, which is characterized in that before the controller receives the temperature field information in the burner hearth from boiler and generation
Feedback signal, controller is based on feed-forward signal and controls spray water flux regulating device, to control the desuperheat into superheated steam system
Water makes boiler export keep stable vapor (steam) temperature.
2. desuperheat water control system as described in claim 1, which is characterized in that the control system further includes temperature sensing
Device, temperature sensor are connect with controller, and the temperature sensor is for acquiring temperature field in two neighboring moment boiler furnace
Temperature and send it to the controller.
3. desuperheat water control system as claimed in claim 2, which is characterized in that the controller includes computing circuit, described
Computing circuit obtains temperature variation based on the temperature in temperature field in the two neighboring moment boiler furnace.
4. desuperheat water control system as claimed in claim 3, which is characterized in that the controller further includes receiving circuit, is connect
It receives circuit to connect with computing circuit, the two neighboring moment boiler for receiving circuit and receiving the temperature sensor acquisition
The temperature in temperature field in burner hearth.
5. desuperheat water control system as claimed in claim 4, which is characterized in that the controller further includes control circuit, electricity
Road is connect with computing circuit, and the control circuit is based on the temperature variation and generates the feed-forward signal.
6. desuperheat water control system as claimed in claim 5, which is characterized in that the controller further includes transmitting line, hair
Power transmission road connects to the control circuit, and the feed-forward signal is sent to the spray water flux regulating device by the transmitting line.
7. desuperheat water control system as claimed in claim 2, which is characterized in that the controller further includes alarm unit, report
Alert unit is connect with the controller, when the temperature in temperature field in the boiler furnace of temperature sensor acquisition is greater than preset threshold value
When, controller controls alarm unit and issues alarm signal.
8. desuperheat water control system as described in claim 1, which is characterized in that the spray water flux regulating device is equipped with flow
Valve, controller are connect with flow valve, and it is preset corresponding with feed-forward signal described that controller is based on feed-forward signal sending
Flow signal is to the flow valve, to control the spray water flux into superheated steam system.
9. desuperheat water control system as claimed in claim 2, which is characterized in that the control system further includes and the temperature
The amplifying circuit of sensor connection.
10. desuperheat water control system as claimed in claim 2, which is characterized in that the temperature sensor is placed in the steaming of boiler
At vapor outlet, for measuring boiler export superheat steam temperature.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019101425618 | 2019-02-26 | ||
| CN201910142561 | 2019-02-26 |
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| Publication Number | Publication Date |
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| CN109915812A true CN109915812A (en) | 2019-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910225847.2A Pending CN109915812A (en) | 2019-02-26 | 2019-03-25 | A kind of desuperheat water control system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101639703A (en) * | 2009-07-28 | 2010-02-03 | 山东电力研究院 | Method for controlling temperature of superheated steam |
| CN105180139A (en) * | 2015-09-17 | 2015-12-23 | 苏州市江远热电有限责任公司 | Main steam temperature control system and method for boiler |
| CN106016229A (en) * | 2016-05-23 | 2016-10-12 | 神华集团有限责任公司 | Main steam temperature control method and device of supercritical circulating fluidized bed boiler set |
| CN207112778U (en) * | 2017-08-25 | 2018-03-16 | 河北大唐国际张家口热电有限责任公司 | A kind of main steam spray desuperheating control system |
| CN108386829A (en) * | 2018-03-01 | 2018-08-10 | 北京德普新源科技发展有限公司 | A kind of temprature control method of boiler overheating steam, device and system |
-
2019
- 2019-03-25 CN CN201910225847.2A patent/CN109915812A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101639703A (en) * | 2009-07-28 | 2010-02-03 | 山东电力研究院 | Method for controlling temperature of superheated steam |
| CN105180139A (en) * | 2015-09-17 | 2015-12-23 | 苏州市江远热电有限责任公司 | Main steam temperature control system and method for boiler |
| CN106016229A (en) * | 2016-05-23 | 2016-10-12 | 神华集团有限责任公司 | Main steam temperature control method and device of supercritical circulating fluidized bed boiler set |
| CN207112778U (en) * | 2017-08-25 | 2018-03-16 | 河北大唐国际张家口热电有限责任公司 | A kind of main steam spray desuperheating control system |
| CN108386829A (en) * | 2018-03-01 | 2018-08-10 | 北京德普新源科技发展有限公司 | A kind of temprature control method of boiler overheating steam, device and system |
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Application publication date: 20190621 |