CN108916852B - Logic protection method based on boiler drum liquid level - Google Patents
Logic protection method based on boiler drum liquid level Download PDFInfo
- Publication number
- CN108916852B CN108916852B CN201810480249.5A CN201810480249A CN108916852B CN 108916852 B CN108916852 B CN 108916852B CN 201810480249 A CN201810480249 A CN 201810480249A CN 108916852 B CN108916852 B CN 108916852B
- Authority
- CN
- China
- Prior art keywords
- liquid level
- signal
- signals
- boiler
- level detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/78—Adaptations or mounting of level indicators
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Control Of Non-Electrical Variables (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention discloses a logic protection method based on boiler drum liquid level, through the blowing-out protection logic in the scheme, when the test point corresponding to only one liquid level detection device in the plurality of liquid level detection devices is in a normal state, the liquid level detection device can output an effective second signal (target signal), the other liquid level detection devices output second signals which are non-target signals, correspondingly, at the moment, the third signals are target signals, at the moment, the number of the target signals is 2, the condition that the number of the target signals in the second signals and the third signals is more than 1 is met, and therefore control signals are output to control the boiler to stop running, compared with the prior art, when only the test point corresponding to one liquid level detection device is in normal state, the furnace shutdown protection logic provided by the scheme has higher reliability, and the risk of abnormal operation of the boiler is reduced.
Description
Technical Field
The invention relates to the technical field of boilers, in particular to a logic protection method based on the liquid level of a boiler drum.
Background
There is a direct link between the steam space within the boiler drum and obtaining good quality steam. The larger the space of the steam in the boiler drum is, the better the steam-water separation effect is, so that the steam with good quality can be obtained. Generally, the water level is zero 150mm below the central line of the steam drum, the normal fluctuation range is about 50mm, and the maximum fluctuation range is not more than 75 mm. If the water level in the steam drum is too high, the steam space is too small, the steam-water separation effect is poor, and the quality of the steam is unqualified. If the water level in the steam drum is too low, the static pressure is smaller than the pressure drop of the boiler water entering the downcomer, and the boiler water entering the downcomer can be gasified, so that the safety of water circulation is endangered, and water shortage, boiler drying and even explosion accidents are caused. The water level in the drum must be maintained within a specified range in order to obtain good steam quality and to ensure safe water circulation within the drum.
Referring to fig. 1(a) and 1(b), fig. 1(a) is a schematic diagram of boiler shutdown protection logic when a water level of a steam drum in a boiler is too high in the prior art, and fig. 1(b) is a schematic diagram of boiler shutdown protection logic when a water level of a steam drum in a boiler is too low in the prior art. When the water level of the steam drum is too high or too low, a boiler shutdown protection signal is output to stop the boiler. However, by adopting the protection logic, when one measuring point fails or stops running due to maintenance, the high-low protection logic of the steam drum water level is changed into two, and when two points fail or stops running due to maintenance, namely when only one measuring point is in normal state, the high-low protection of the steam drum water level is stopped. The reliability of the boiler shutdown protection logic is low, and the steam quality is unqualified when the water level in the steam drum is too high, or the risk of abnormal operation of the boiler is caused when the water level in the steam drum is too low.
Therefore, how to ensure the reliability of the shutdown protection logic of high and low water levels in the boiler drum to reduce the risk of abnormal operation of the boiler is a problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a logic protection method based on the liquid level of a boiler drum, which ensures the reliability of boiler shutdown protection logic of high and low water levels in the boiler drum and reduces the risk of abnormal operation of a boiler.
In order to achieve the above purpose, the embodiment of the present invention provides the following technical solutions:
the embodiment of the invention provides a logic protection method based on the liquid level of a boiler drum, which comprises the following steps:
acquiring liquid level detection signals output by a plurality of liquid level detection devices and fault detection signals corresponding to the liquid level detection devices; the liquid level detection signal is a comparison signal of an actual liquid level and a set liquid level;
respectively carrying out operation related to non-operation on each fault detection signal to obtain a first signal;
performing and operation on liquid level detection signals corresponding to the liquid level detection devices and the first signals corresponding to the liquid level detection devices to obtain second signals;
performing OR operation on each fault detection signal to obtain a third signal;
wherein, if at least one non-target signal exists in each second signal, the third signal is the target signal;
judging whether the number of the target signals in each of the second signal and the third signal is greater than 1;
if yes, outputting a control signal to control the boiler to stop operating;
if not, no action is carried out on the boiler so as to ensure that the boiler works normally.
Preferably, the obtaining the first signal by performing an operation related to an non-operation on each of the fault detection signals includes:
and respectively carrying out non-operation on each fault detection signal to obtain the first signal.
Preferably, the obtaining the first signal by performing the operation of non-operation correlation on each of the fault detection signals includes:
delaying each of the fault detection signals for a predetermined time;
and performing the non-operation on each delayed fault detection signal to obtain the first signal.
Preferably, the obtaining the first signal by performing the operation of non-operation correlation on each of the fault detection signals includes:
delaying each of the fault detection signals for a predetermined time;
and performing the non-operation on each delayed fault detection signal to obtain the first signal.
Preferably, the target signal is a high-level signal.
Preferably, the set liquid level is a high liquid level set value, and correspondingly, when the actual liquid level is higher than the high liquid level set value, the liquid level detection signal is the high level signal.
Preferably, the high level set point is in particular 150 mm.
Preferably, the set liquid level is a low liquid level set value, and correspondingly, when the actual liquid level is lower than the low liquid level set value, the liquid level detection signal is the high level signal.
Preferably, the low level set point is in particular-180 mm.
The logic protection method based on the boiler drum liquid level, disclosed by the embodiment of the invention, comprises the steps of carrying out operation related to non-operation on fault detection signals of all liquid level detection devices to obtain first signals, carrying out AND operation on the liquid level detection signals output by the liquid level detection devices and the corresponding first signals to obtain second signals, and carrying out OR operation on all fault detection signals to obtain third signals, wherein if at least one non-target signal exists in all the second signals, the third signals are target signals; judging whether the number of target signals in each second signal and each third signal is greater than 1; if so, outputting a control signal to control the boiler to stop operating, and if not, not performing any action on the boiler to ensure that the boiler normally operates. Therefore, through the protection logic in the scheme, when the test point corresponding to only one remaining liquid level detection device in the plurality of liquid level detection devices is in a normal state, the liquid level detection device can output an effective second signal (target signal), the remaining liquid level detection devices output the second signal which is a non-target signal and correspond to the non-target signal, at the moment, the third signal is the target signal, at the moment, the number of the target signals is 2, the condition that the number of the target signals in the second signal and the third signal is greater than 1 is met, and therefore the control signal is output to control the boiler to stop operating.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1(a) is a schematic diagram of the logic of shutdown protection in case of an excessive drum water level in a boiler in the prior art;
FIG. 1(b) is a schematic diagram of the boiler shutdown protection logic when the drum water level in the boiler is too low in the prior art;
FIG. 2 is a schematic flow chart of a logic protection method based on the liquid level of a boiler drum according to an embodiment of the present invention;
FIG. 3 is a logic diagram of a boiler drum liquid level based logic protection method disclosed in an embodiment of the present invention;
FIG. 4 is a logic diagram of another boiler drum level based logic protection method disclosed in the embodiments of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a logic protection method based on the liquid level of a boiler drum, which ensures the reliability of boiler shutdown protection logic of high and low water levels in the boiler drum and reduces the risk of abnormal operation of a boiler.
Referring to fig. 2, fig. 2 is a schematic flow chart of a logic protection method based on a boiler drum liquid level, which is disclosed in an embodiment of the present invention, and the method includes:
s201, acquiring liquid level detection signals output by a plurality of liquid level detection devices and fault detection signals corresponding to the liquid level detection devices; the liquid level detection signal is a comparison signal of the actual liquid level and the set liquid level;
specifically, in this embodiment, the liquid level detection device may be a transmitter, the number of the liquid level detection devices may be two, three, or more, and the liquid level detection signal is a comparison signal between the actual liquid level output by the liquid level detection device and the set liquid level. In which the description is given when the liquid level detection device is a transmitter. The number of the transmitters is 3, and the set liquid level in the transmitters is divided into a high liquid level set value and a low liquid level set value. Wherein, as a preferred embodiment, the high level set point is specifically 150mm and the low level set point is specifically-180 mm. After the set liquid level in the transmitter is determined, the transmitter measures the actual liquid level in the boiler steam drum, and compares the actual liquid level with a high liquid level set value of 150mm and a low liquid level set value of-180 mm respectively to obtain a comparison signal, wherein the comparison signal is divided into a target signal and a non-target signal, and the target signal is as follows: when the actual liquid level exceeds the high liquid level set value or the actual liquid level is lower than the low liquid level set value, the output comparison signal is the target signal, and as a preferred embodiment, the target signal is specifically a high level signal. In a preferred embodiment, the liquid level is set to a high level set value, and correspondingly, when the actual liquid level is higher than the high level set value, the liquid level detection signal is a high level signal. In a preferred embodiment, the liquid level is set to a low level set value, and correspondingly, when the actual liquid level is lower than the high level set value, the liquid level detection signal is a high level signal.
Of course, in this embodiment, the high liquid level set value and the low liquid level set value may also be other values, and the embodiment of the present invention is not limited herein.
Further, the failure detection signal is a signal indicating whether or not each of the liquid level detecting devices has failed, and if the liquid level detecting device has failed, the failure detection signal corresponding to the failed liquid level detecting device is a target signal (may be a high-level signal), and if the liquid level detecting device has not failed, the failure detection signal corresponding to the liquid level detecting device is a non-target signal (the non-target signal may be a low-level signal). When the liquid level detection device breaks down, at this moment, this liquid level detection device just can no longer work, and at this moment, no matter whether the actual liquid level of this liquid level detection device department surpasss and sets for the liquid level, this liquid level detection device is all not output signal.
It should be noted that the liquid level detection devices in this embodiment are all disposed at the same horizontal position. Take three liquid level detection devices as an example; if three liquid level detection device are non-fault state, and three liquid level detection device are inside all to be provided with the same high liquid level setting value, when the liquid level in the boiler steam drum surpassed the high liquid level setting value in the three liquid level detection device, three liquid level detection device all output target signal, three target signal promptly, it is corresponding, because three liquid level detection device all is in non-fault state, consequently, three trouble detection signal is all non-target signal. The same applies for low level settings in the level detection means.
S202, respectively carrying out operation related to non-operation on each fault detection signal to obtain a first signal.
Specifically, in this embodiment, each liquid level detection device is subjected to fault detection, and then the obtained multiple fault detection signals are subjected to non-operation, respectively. I.e. not-operating for each fault detection signal. Taking three fault detection devices as an example for explanation, if one fault liquid level detection device exists in the three liquid level detection devices, the fault detection signal of the corresponding fault liquid level detection device is a target signal, and the fault detection signals of the other non-fault liquid level detection devices are non-target signals, the target signal is subjected to operation related to non-operation to obtain a first signal (non-target signal), and the fault detection signal (non-target signal) of the non-fault liquid level detection device is subjected to operation related to non-operation to obtain a first signal (target signal).
Therefore, in this embodiment, the first signal may be a target signal or a non-target signal. If the target signal is a high level signal, the non-target signal is a low level signal.
Further, as a preferred embodiment, the operations related to non-operation in this embodiment may include: only carrying out non-operation on the fault detection signals, and then, respectively carrying out delay of preset time on each fault detection signal; and carrying out non-operation on each delayed fault detection signal to obtain a first signal.
And S203, performing AND operation on the liquid level detection signals corresponding to the liquid level detection devices and the first signals corresponding to the liquid level detection devices to obtain second signals.
Specifically, in this embodiment, after the liquid level detection signal corresponding to each liquid level detection device and the first signal corresponding to each liquid level detection device are correspondingly obtained, the liquid level detection signal of each liquid level detection device and the first signal are and-operated to obtain the second signal. Three liquid level detection devices are used for explanation; wherein, there is a liquid level detection device of trouble in the three liquid level detection devices, at this moment, the liquid level detection signal corresponding to liquid level detection device of trouble is the non-target signal, the trouble detection signal corresponding to liquid level detection device of trouble is the target signal; when the comparison signals output by the other two liquid level detection devices are target signals, the fault detection signals corresponding to the two liquid level detection devices are non-target signals. The liquid level detecting device corresponding to the fault performs non-operation on the fault detection signal to obtain a target signal (first signal), and when performing AND operation on the liquid level detection signal corresponding to the target signal and the first signal, an output second signal is a non-target signal. And respectively carrying out AND operation on the liquid level detection signal of each liquid level detection device and the fault detection signal corresponding to each liquid level detection device corresponding to the other two fault liquid level detection devices, taking one of the liquid level detection devices as an example, the liquid level detection signal output by the liquid level detection device without the fault at the moment is a target signal, the fault detection signal corresponding to the liquid level detection device is a non-target signal, and carrying out operation related to the non-target signal to obtain a second signal (target signal). And the liquid level detection signal and the second signal are subjected to AND operation to obtain a target signal. Of course, in this embodiment, the number of the liquid level detection devices may also be other numbers, and the embodiment of the present invention is not limited thereto.
And S204, performing OR operation on the fault detection signals to obtain a third signal.
Specifically, in this embodiment, the or operation is performed on each of the failure detection signals at the same time. Three liquid level detecting devices are exemplified. If at least one failed liquid level detection device exists in the three liquid level detection devices, the fault detection signal corresponding to the failed liquid level detection device is a target signal, and the fault detection signal corresponding to the liquid level detection device which is not failed is a non-target signal. And performing OR operation on one target signal and two non-target signals to obtain a third signal (target signal). If no fault liquid level detection device exists in the three liquid level detection devices, the corresponding fault detection signals are all non-target signals, and the three non-target signals are subjected to OR operation to obtain a third signal (non-target signal). The target signal may be a high-level signal, and the non-target signal may be a low-level signal. And if at least one non-target signal exists in the second signals, the third signal is a target signal.
S205, determining whether the number of target signals in each of the second signal and the third signal is greater than 1, if so, proceeding to step S206, and if not, proceeding to step S207.
Specifically, in this embodiment, the target signals are screened from all the second signals and the third signals, and whether the number of the target signals is greater than 1 is determined (it may also be determined whether the number of the target signals is greater than or equal to 2). Taking the example of the above embodiment as a basis, taking three liquid level detecting devices as an example, if there are two failed liquid level detecting devices, the third signal outputted correspondingly is the target signal, and one target signal exists in the second signal outputted correspondingly. At this time, of the four signals, there are two target signals, and the condition that the number of target signals is greater than 1 is satisfied.
And S206, outputting a control signal to control the boiler to stop operating.
And S207, performing no action on the boiler so as to enable the boiler to work normally.
Specifically, in this embodiment, if the target signal is not greater than 1, the following conditions exist, that is, first, each liquid level detection device does not have a fault, but the actual liquid level does not exceed the set liquid level in the liquid level detection device at this time, and the liquid level detection signal output by each liquid level detection device is a non-target signal. Secondly, each liquid level detection device has a fault, and at the moment, fault detection signals corresponding to the liquid level detection devices are target signals. The third signal is also a target signal, and each second signal is a non-target signal. There is only one target signal of all the second and third signals. When the two conditions exist, the boiler still works normally.
The logic protection method based on the boiler drum liquid level, disclosed by the embodiment of the invention, comprises the steps of carrying out operation related to non-operation on fault detection signals of all liquid level detection devices to obtain first signals, carrying out AND operation on the liquid level detection signals output by the liquid level detection devices and the corresponding first signals to obtain second signals, and carrying out OR operation on all fault detection signals to obtain third signals, wherein if at least one non-target signal exists in all the second signals, the third signals are target signals; judging whether the number of target signals in each second signal and each third signal is greater than 1; if so, outputting a control signal to control the boiler to stop operating, and if not, not performing any action on the boiler to ensure that the boiler normally operates. Therefore, through the protection logic in the scheme, when the test point corresponding to only one remaining liquid level detection device in the plurality of liquid level detection devices is in a normal state, the liquid level detection device can output an effective second signal (target signal), the remaining liquid level detection devices output the second signal which is a non-target signal and correspond to the non-target signal, at the moment, the third signal is the target signal, at the moment, the number of the target signals is 2, the condition that the number of the target signals in the second signal and the third signal is greater than 1 is met, and therefore the control signal is output to control the boiler to stop operating.
In the following, the present invention provides the following practical application scenarios for the boiler drum liquid level-based logic protection method disclosed by the present invention. Taking three level detection devices as an example, correspond to a high level set point and a low level set point. Referring to fig. 3, fig. 3 is a logic diagram of a logic protection method based on a boiler drum liquid level according to an embodiment of the present invention; h1, H2 and H3 respectively correspond to the high liquid level detection signals output by each liquid level detection device, and QF1, QF2 and QF3 respectively correspond to the fault detection signals of each liquid level detection device. TON is to delay each liquid level detection signal, and NOT is to perform non-operation on the delayed fault detection signal. AND is to perform AND operation on the fault detection signal AND the high liquid level detection signal after NOT processing. OR is an OR operation performed on each failure detection signal. AND selecting the signals output by the AND gate AND the OR gate, AND outputting a control signal MFT signal to control the boiler to stop operating if two OR three target signals exist in the total signals output by the AND gate AND the OR gate.
Referring to fig. 4, fig. 4 is a logic diagram of another logic protection method based on the liquid level of a boiler drum according to the embodiment of the present invention;
referring to fig. 3, fig. 3 is a schematic diagram of another scanning detection apparatus based on network behavior according to an embodiment of the present invention, wherein L1, L2, and L3 respectively correspond to low liquid level detection signals output by each liquid level detection device, and QF1, QF2, and QF3 respectively correspond to fault detection signals output by each liquid level detection device. TON is to delay each liquid level detection signal, and NOT is to perform non-operation on the delayed fault detection signal. AND is to perform AND operation on the fault detection signal AND the high liquid level detection signal after NOT processing. OR is an OR operation performed on each failure detection signal. AND selecting the signals output by the AND gate AND the OR gate, AND outputting a control signal MFT signal to control the boiler to stop operating if two OR three target signals exist in the total signals output by the AND gate AND the OR gate.
The logic protection method based on the boiler drum liquid level provided by the application is described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (8)
1. A logic protection method based on boiler drum liquid level is characterized by comprising the following steps:
acquiring liquid level detection signals output by a plurality of liquid level detection devices and fault detection signals corresponding to the liquid level detection devices; the liquid level detection signal is a comparison signal of an actual liquid level and a set liquid level;
respectively carrying out operation related to non-operation on each fault detection signal to obtain a first signal; said performing non-operation related operations on the fault detection signal comprises performing at least non-operation on the fault detection signal;
performing and operation on liquid level detection signals corresponding to the liquid level detection devices and the first signals corresponding to the liquid level detection devices to obtain second signals;
performing OR operation on each fault detection signal to obtain a third signal;
wherein, if at least one non-target signal exists in each second signal, the third signal is the target signal; the target signal is the liquid level detection signal output by the liquid level detection device when the actual liquid level exceeds a high liquid level set value or when the actual liquid level is lower than a low liquid level set value;
judging whether the number of the target signals in each of the second signal and the third signal is greater than 1;
if yes, outputting a control signal to control the boiler to stop operating;
if not, no action is carried out on the boiler so as to ensure that the boiler works normally.
2. The method of claim 1, wherein the performing non-operation-dependent operations on each of the fault detection signals to obtain the first signal comprises:
and respectively carrying out the NOT operation on each fault detection signal to obtain the first signal.
3. The method of claim 1, wherein the performing non-operation-dependent operations on each of the fault detection signals to obtain the first signal comprises:
delaying each of the fault detection signals for a predetermined time;
and performing the non-operation on each delayed fault detection signal to obtain the first signal.
4. The boiler drum level based logic protection method according to any of the claims 1-3, characterized in that the target signal is in particular a high level signal.
5. The boiler drum liquid level based logic protection method according to claim 4, wherein the set liquid level is a high level set value, and correspondingly, the liquid level detection signal is the high level signal when the actual liquid level is higher than the high level set value.
6. The boiler drum level based logic protection method according to claim 5, wherein the high level setpoint is in particular 150 mm.
7. The boiler drum liquid level based logic protection method according to claim 4, wherein the set liquid level is a low level set value, and correspondingly, the liquid level detection signal is the high level signal when the actual liquid level is lower than the low level set value.
8. The boiler drum level based logic protection method according to claim 7, wherein the low level setpoint is in particular-180 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810480249.5A CN108916852B (en) | 2018-05-18 | 2018-05-18 | Logic protection method based on boiler drum liquid level |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810480249.5A CN108916852B (en) | 2018-05-18 | 2018-05-18 | Logic protection method based on boiler drum liquid level |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108916852A CN108916852A (en) | 2018-11-30 |
| CN108916852B true CN108916852B (en) | 2020-03-27 |
Family
ID=64403801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810480249.5A Active CN108916852B (en) | 2018-05-18 | 2018-05-18 | Logic protection method based on boiler drum liquid level |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108916852B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11281457A (en) * | 1998-03-27 | 1999-10-15 | Takashige Sangyo Kk | Level gage |
| CN101101112A (en) * | 2007-04-29 | 2008-01-09 | 上海红箭自动化设备有限公司 | Control method of boiler water level and its control system |
| CN102402230A (en) * | 2011-11-29 | 2012-04-04 | 中广核工程有限公司 | Liquid level measuring and controlling system |
| CN103292312A (en) * | 2013-06-25 | 2013-09-11 | 莱芜钢铁集团有限公司 | Method for controlling water level of steam pocket |
-
2018
- 2018-05-18 CN CN201810480249.5A patent/CN108916852B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11281457A (en) * | 1998-03-27 | 1999-10-15 | Takashige Sangyo Kk | Level gage |
| CN101101112A (en) * | 2007-04-29 | 2008-01-09 | 上海红箭自动化设备有限公司 | Control method of boiler water level and its control system |
| CN102402230A (en) * | 2011-11-29 | 2012-04-04 | 中广核工程有限公司 | Liquid level measuring and controlling system |
| CN103292312A (en) * | 2013-06-25 | 2013-09-11 | 莱芜钢铁集团有限公司 | Method for controlling water level of steam pocket |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108916852A (en) | 2018-11-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109540205A (en) | Monitoring method, device, monitoring device and the storage medium of pipeline of nuclear power plant | |
| CN102446566B (en) | Steam generator water-level control method and device and nuclear power plant of nuclear power generating unit | |
| CN103823401A (en) | Method and device for giving alarm in unit-level self start-stop control system | |
| KR20110072746A (en) | Automated periodic surveillance testing method and apparatus in digital reactor protection system | |
| Alizadeh et al. | Reliability modelling of redundant safety systems without automatic diagnostics incorporating common cause failures and process demand | |
| US5847266A (en) | Recovery boiler leak detection system and method | |
| CN108916852B (en) | Logic protection method based on boiler drum liquid level | |
| US10438707B2 (en) | Nuclear power plant that can automatically close a steam safety relief valve upon determination of exhaust pipe leakage | |
| CN105513659A (en) | Output control method and system of nuclear power plant reactor protection system | |
| CN104749467A (en) | Distribution terminal self-diagnostic method and system | |
| CN113702730A (en) | Fault diagnosis method and system for photovoltaic module and processor | |
| KR20180073227A (en) | Method and Apparatus for prevention of Reactor Trip in a Loss of one Reactor Coolant Pump | |
| KR102289405B1 (en) | Emergency generator including function for preventing and maintaining abnormal symptoms | |
| EP3765932A1 (en) | Wind turbine fault monitoring system and method | |
| EP3312844B1 (en) | Abnormality indication monitoring system | |
| KR101663936B1 (en) | Method for Examination of Sensing Signal and Control Signal in Power Plants and Apparatus thereof | |
| KR20210000546A (en) | Method for maintaining the predictive value of the device of the control output signal | |
| CN104007758B (en) | Gateway communication abnormality self-diagnosing method and system in nuclear power station dcs | |
| JP2017169360A (en) | Operation continuous control apparatus at time of system disturbance and operation continuous control method for the same | |
| EP3375982A1 (en) | Methods of detecting one failure in a burner of a combustor and turbine systems | |
| CN104018894A (en) | Checking processing method of steam turbine electric hydraulic control system pulse impact | |
| Panteli et al. | Impact of SIPS performance on power systems integrity | |
| KR100852718B1 (en) | Method for tracing trip-cause in industrial plant | |
| CN105469845A (en) | Nuclear power station concrete containment spraying system starting device and method thereof | |
| CN114251645B (en) | Steam generator water level control system and control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |