CN108916852A - A kind of virtual protection method based on boiler vapor liquid level - Google Patents
A kind of virtual protection method based on boiler vapor liquid level Download PDFInfo
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- CN108916852A CN108916852A CN201810480249.5A CN201810480249A CN108916852A CN 108916852 A CN108916852 A CN 108916852A CN 201810480249 A CN201810480249 A CN 201810480249A CN 108916852 A CN108916852 A CN 108916852A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/78—Adaptations or mounting of level indicators
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
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- Control Of Non-Electrical Variables (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The virtual protection method based on boiler vapor liquid level that the invention discloses a kind of,Pass through the protection of boiler during shutdown period logic in this programme,When only the surplus corresponding test point of a level sensing device is in normal in multiple level sensing devices,This level sensing device can export effective second signal (echo signal),It is non-targeted signal that remaining level sensing device, which exports second signal,,It is then corresponding,At this time,Third signal is echo signal,At this time,The quantity of echo signal is 2,The quantity for meeting echo signal in second signal and third signal is greater than 1 condition,It stops operating to export control signal control boiler,Compared with prior art,When only the surplus corresponding test point of a level sensing device is in normal,The protection of boiler during shutdown period logic that this programme provides has higher reliability,Reduce the risk of boiler abnormal operation.
Description
Technical field
The present invention relates to boiler technology field, in particular to a kind of virtual protection method based on boiler vapor liquid level.
Background technique
Have between the vapor space in boiler drum and the acquirement good steam of quality and directly contacts.In boiler drum
Steam space it is bigger, steam-water separation effect is better, so as to obtain the good steam of quality.In general, at drum center
150mm below line is zero level, and normal fluctuation range is 50mm or more, and maximum fluctuation range is no more than 75mm.If in drum
Water level it is excessively high, then it is too small to will lead to the vapor space, causes steam-water separation effect poor, the quality of steam is unqualified.Water in drum
Position is too low, can be less than the pressure drop that furnace water enters down-comer due to static pressure, the furnace water into down-comer may gasify, and jeopardize water
The safety of circulation causes water shortage, dry pot, or even explosion accident occurs.So guaranteeing drum to obtain good steam quality
The safety of interior water circulation, the water level in drum preferably must be held in prescribed limit.
The relay protective scheme of water level height is the logic judgement mode by two from three in traditional detection drum, refers to figure
1 (a) and Fig. 1 (b), Fig. 1 (a) are protection of boiler during shutdown period logic signal when steam water-level is excessively high in a kind of boiler in the prior art
Figure, Fig. 1 (b) are protection of boiler during shutdown period logical schematic when steam water-level is too low in a kind of boiler in the prior art.When drum water
Position, which can all export protection of boiler during shutdown period signal when too high or too low, makes boiler stop operating.But this relay protective scheme is used, when having one
A measuring point failure or when because overhauling out of service, the height relay protective scheme of steam water-level just becomes two and takes two, when there is two points fault
Or when because overhauling out of service, as soon as that is, only surplus test point is in normal, steam water-level height is exited and having protected.This kind stops
The reliability of furnace relay protective scheme is lower, will lead to that steam quality is unqualified when the water level in drum is excessively high or drum in water
The risk of boiler abnormal operation is caused when too low in position.
Therefore, how to guarantee that the reliability of the protection of boiler during shutdown period logic of the high and low water level in boiler drum is different to reduce boiler
The risk often operated is those skilled in the art's problem to be solved.
Summary of the invention
The virtual protection method based on boiler vapor liquid level that the purpose of the present invention is to provide a kind of, ensure that boiler drum
The reliability of the protection of boiler during shutdown period logic of interior high and low water level, reduces the risk of boiler abnormal operation.
To achieve the above object, the embodiment of the invention provides following technical solutions：
The virtual protection method based on boiler vapor liquid level that the embodiment of the invention provides a kind of, including：
Obtain the level sensing signal of multiple level sensing devices output and corresponding with each level sensing device
Fault detection signal；The level sensing signal is actual liquid level and the comparison signal for setting liquid level；
Operation relevant with inverse is carried out to each fault detection signal respectively and obtains the first signal；
Will and the corresponding level sensing signal of each level sensing device and corresponding with each level sensing device
First signal carries out obtaining second signal with operation；
Each fault detection signal is carried out or operation obtains third signal；
Wherein, if there are when at least one non-described echo signal in each second signal, the third signal is
The echo signal；
Judge whether each second signal and the quantity of the echo signal in the third signal are greater than 1；
If so, output control signal is stopped operating with controlling boiler；
If it is not, then being acted without any so that the normal operation of boiler to the boiler.
Preferably, described the relevant operation of NAND operation is carried out to each fault detection signal respectively to obtain the first signal
Including：
Inverse is carried out to each fault detection signal respectively and obtains first signal.
Preferably, described operation relevant with inverse is carried out to each fault detection signal respectively to obtain the first signal
Including：
The delay of predetermined time is carried out to each fault detection signal respectively；
First signal is obtained to each fault detection signal progress inverse after delayed.
Preferably, described operation relevant with inverse is carried out to each fault detection signal respectively to obtain the first signal
Including：
The delay of predetermined time is carried out to each fault detection signal respectively；
First signal is obtained to each fault detection signal progress inverse after delayed.
Preferably, the echo signal is specially high level signal.
Preferably, the liquid level that sets is corresponding as high liquid level setting value, when the actual liquid level is higher than the high liquid level
When setting value, the level sensing signal is then the high level signal.
Preferably, the high liquid level setting value is specially 150mm.
Preferably, the liquid level that sets is corresponding as low liquid level setting value, when the actual liquid level is lower than the low liquid level
When setting value, the level sensing signal is then the high level signal.
Preferably, the low liquid level setting value is specially -180mm.
As it can be seen that a kind of virtual protection method based on boiler vapor liquid level disclosed by the embodiments of the present invention, by each liquid
The fault detection signal of bit detector part carries out operation relevant with inverse and obtains the first signal, and to multiple liquid level detectors
The level sensing signal of part output carries out obtaining second signal with operation with corresponding first signal, while believing each fault detection
It number carries out or operation obtains third signal, wherein if there are when at least one non-targeted signal in each second signal, third signal
It is then echo signal；Judge whether the quantity of echo signal in each second signal and third signal is greater than 1；If so, output control
Signal control boiler processed stops operating, if it is not, then acting without any so that normal operation of boiler to boiler.Therefore, pass through
Relay protective scheme in this programme, when only the surplus corresponding test point of a level sensing device is in just in multiple level sensing devices
Chang Shi, this level sensing device can export effective second signal (echo signal), the output of remaining level sensing device
Second signal is non-targeted signal, then corresponding, at this point, third signal is echo signal, at this point, the quantity of echo signal is 2
A, the quantity for meeting echo signal in second signal and third signal is greater than 1 condition, to export control signal control boiler
It stops operating, compared with prior art, when only the surplus corresponding test point of a level sensing device is in normal, this programme is mentioned
The protection of boiler during shutdown period logic of confession has higher reliability, reduces the risk of boiler abnormal operation.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 (a) is protection of boiler during shutdown period logical schematic when steam water-level is excessively high in a kind of boiler in the prior art；
Fig. 1 (b) is protection of boiler during shutdown period logical schematic when steam water-level is too low in a kind of boiler in the prior art；
Fig. 2 is a kind of virtual protection method flow schematic diagram based on boiler vapor liquid level disclosed by the embodiments of the present invention；
Fig. 3 is a kind of logic signal of virtual protection method based on boiler vapor liquid level disclosed by the embodiments of the present invention
Figure；
Fig. 4 is the logic signal of another virtual protection method based on boiler vapor liquid level disclosed by the embodiments of the present invention
Figure.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The virtual protection method based on boiler vapor liquid level that the embodiment of the invention discloses a kind of, ensure that in boiler drum
High and low water level protection of boiler during shutdown period logic reliability, reduce the risk of boiler abnormal operation.
Fig. 2 is referred to, Fig. 2 is a kind of virtual protection method stream based on boiler vapor liquid level disclosed by the embodiments of the present invention
Journey schematic diagram, this method include：
S201, the level sensing signal for obtaining the output of multiple level sensing devices and corresponding with each level sensing device
Fault detection signal；Level sensing signal is actual liquid level and the comparison signal for setting liquid level；
Specifically, level sensing device can be transmitter in the present embodiment, the quantity of level sensing device can be two
It is a, three or more, level sensing signal be level sensing device output actual liquid level believe compared with setting liquid level
Number.It is illustrated when wherein, using level sensing device as transmitter.The quantity of transmitter is 3, the setting liquid level in transmitter
It is divided into high liquid level setting value and low liquid level setting value.Wherein, as preferred embodiment, high liquid level setting value is specially 150mm,
Low liquid level setting value is specially -180mm.After determining the setting liquid level in transmitter, transmitter is measured in boiler drum
Actual liquid level is compared and is compared with high liquid level setting value 150mm and low liquid level setting value -180mm respectively by actual liquid level
Compared with signal, wherein comparison signal is divided into echo signal and non-targeted signal, and echo signal is：When actual liquid level exceeds high liquid level
When setting value or actual liquid level are lower than low liquid level setting value, the comparison signal of output is echo signal, as preferred reality
Example is applied, echo signal is specially high level signal.As preferred embodiment, liquid level is set as high liquid level setting value, it is corresponding,
When actual liquid level is higher than high liquid level setting value, level sensing signal is then high level signal.As preferred embodiment, setting
Liquid level is low liquid level setting value, corresponding, and when actual liquid level is lower than high liquid level setting value, level sensing signal is then high level
Signal.
Certainly, in the present embodiment, high liquid level setting value and low liquid level setting value may be other numerical value, and the present invention is implemented
Example herein and is not construed as limiting.
Further, fault detection signal is signal when whether each level sensing device breaks down, if liquid level detector
Failure has occurred in part, then the fault detection signal of the level sensing device to break down with this is that echo signal (can be high electricity
Ordinary mail number), if level sensing device does not break down, fault detection signal corresponding with the level sensing device is then non-targeted
Signal (non-targeted signal can be low level signal).When level sensing device breaks down, at this point, the level sensing device
Just it no longer works, no matter at this point, whether the actual liquid level at the level sensing device exceeds setting liquid level, the level sensing device
Not output signal.
It should be noted that the level sensing device in the present embodiment is all set in identical horizontal position.With three liquid
For bit detector part；If three level sensing devices are non-faulting state, and are respectively provided with inside three level sensing devices
There is identical high liquid level setting value, when the liquid level in boiler drum is beyond the high liquid level setting value in three level sensing devices
When, three level sensing devices export echo signal, i.e. three echo signals, and it is corresponding, due to three level sensing devices
It is in non-faulting state, therefore, the non-targeted signal of three fault detection signals.For the low liquid level in level sensing device
Setting value is equally applicable.
S202, the first signal is obtained to each fault detection signal progress operation relevant with inverse respectively.
Specifically, carrying out fault detection, the multiple failures that then will be obtained to each level sensing device in the present embodiment
Detection signal carries out inverse respectively.Inverse is carried out to each fault detection signal.By taking three fault detection devices as an example
It is illustrated, if there are the level sensing devices of a failure in three level sensing devices, corresponds to the level sensing of failure
Device, fault detection signal are echo signal, and the fault detection signal of the level sensing device of remaining non-failure is non-mesh
Signal is marked, then operation relevant with inverse is carried out to echo signal and obtains the first signal (non-targeted signal), to non-failure
The fault detection signal (non-targeted signal) of level sensing device carries out operation relevant with inverse and obtains the first signal (target
Signal).
Therefore, in the present embodiment, the first signal can be echo signal, or non-targeted signal.Wherein, if target
Signal is high level signal, then non-targeted signal is then low level signal.
Further, may include as the operation relevant with inverse in preferred embodiment the present embodiment：To failure
Detection signal only carries out inverse, secondly, the delay of predetermined time can also be carried out first to each fault detection signal respectively；To warp
Each fault detection signal after delay carries out inverse and obtains the first signal.
S203, will and the corresponding level sensing signal of each level sensing device and with each level sensing device corresponding first
Signal carries out obtaining second signal with operation.
Specifically, in the present embodiment, it is corresponding, obtain the corresponding level sensing signal of each level sensing device and each liquid
After corresponding first signal of bit detector part, the level sensing signal of each level sensing device and the first signal are carried out and transported
Calculation obtains second signal.Wherein, it is illustrated with three level sensing devices；Wherein, exist in three level sensing devices
The level sensing device of one failure, at this point, level sensing signal corresponding with the level sensing device of failure is non-targeted letter
Number, fault detection signal corresponding with the level sensing device of failure is echo signal；The output of other two level sensing device
Comparison signal be echo signal when, then fault detection signal corresponding with two level sensing devices be non-targeted signal.
It is echo signal (the first letter to what is obtained after fault detection signal progress inverse corresponding to the level sensing device of failure
Number), when carrying out corresponding level sensing signal and the first signal with operation, the second signal of output is then non-targeted letter
Number.Corresponding to the level sensing device of other two failure, level sensing signal respectively for each level sensing device and
Fault detection signal corresponding with each level sensing device carries out and operation, and for one of them, the liquid level of non-failure is examined
Surveying the level sensing signal that device exports at this time is echo signal, which is then non-
Echo signal obtains second signal (echo signal) after carrying out operation relevant with inverse to the non-targeted signal.To the liquid
Position detection signal and second signal carry out with what is obtained after operation being echo signal.Certainly, in the present embodiment, liquid level detector
The quantity of part may be other quantity, to this embodiment of the present invention and be not construed as limiting.
S204, third signal is obtained to the progress of each fault detection signal or operation.
Specifically, in the present embodiment, by progress or the operation simultaneously of each fault detection signal.Or with three level sensings
It is illustrated for device.If there are when the level sensing device of at least one failure in three level sensing devices, with therefore
The corresponding fault detection signal of level sensing device of barrier is echo signal, failure corresponding with the level sensing device of non-failure
Detecting signal is then non-targeted signal.To an echo signal and two non-targeted signals carry out or operation obtains third signal
(echo signal).If failure level sensing device is not present in three level sensing devices, corresponding fault detection signal is equal
For non-targeted signal, three non-targeted signals are carried out or operation obtains third signal (non-targeted signal).Wherein, echo signal
It can be high level signal, non-targeted signal can be low level signal.Wherein, non-if there are at least one in each second signal
When echo signal, the third signal is then echo signal.
S205, judge whether the quantity of each second signal and the echo signal in third signal is greater than 1, if so, into
Step S206, if it is not, then entering step S207.
Specifically, screening echo signal in all second signals and third signal, and judge target in the present embodiment
Whether the quantity of signal was greater than for 1 (being also possible to judge whether the quantity of echo signal is more than or equal to 2).It is lifted with above-described embodiment
Based on example, by taking three level sensing devices as an example, if wherein there are two the level sensing devices of failure, output is corresponded to
Third signal is echo signal, and there are an echo signals in the second signal of corresponding output.At this time in four signals, exist
Two echo signals, the quantity for meeting echo signal are greater than 1 condition.
S206, output control signal are stopped operating with controlling boiler.
S207, boiler is acted without any so that normal operation of boiler.
Specifically, in the present embodiment, at this point, if echo signal has following several situations no more than 1, the first, each liquid
Bit detector part is all without failure, still, actual liquid level and the setting liquid level being less than in liquid level detector part at this time, each liquid
The non-targeted signal of level sensing signal of bit detector part output.Second, each level sensing device breaks down, this
When, fault detection signal corresponding with each level sensing device is echo signal.Third signal is also echo signal, each second
Signal is non-targeted signal.Only one echo signal in all second signals and third signal.There are both the above feelings
When condition, boiler is still worked normally.
As it can be seen that a kind of virtual protection method based on boiler vapor liquid level disclosed by the embodiments of the present invention, by each liquid
The fault detection signal of bit detector part carries out operation relevant with inverse and obtains the first signal, and to multiple liquid level detectors
The level sensing signal of part output carries out obtaining second signal with operation with corresponding first signal, while believing each fault detection
It number carries out or operation obtains third signal, wherein if there are when at least one non-targeted signal in each second signal, third signal
It is then echo signal；Judge whether the quantity of echo signal in each second signal and third signal is greater than 1；If so, output control
Signal control boiler processed stops operating, if it is not, then acting without any so that normal operation of boiler to boiler.Therefore, pass through
Relay protective scheme in this programme, when only the surplus corresponding test point of a level sensing device is in just in multiple level sensing devices
Chang Shi, this level sensing device can export effective second signal (echo signal), the output of remaining level sensing device
Second signal is non-targeted signal, then corresponding, at this point, third signal is echo signal, at this point, the quantity of echo signal is 2
A, the quantity for meeting echo signal in second signal and third signal is greater than 1 condition, to export control signal control boiler
It stops operating, compared with prior art, when only the surplus corresponding test point of a level sensing device is in normal, this programme is mentioned
The protection of boiler during shutdown period logic of confession has higher reliability, reduces the risk of boiler abnormal operation.
Below for the virtual protection method disclosed by the invention based on boiler vapor liquid level, the present invention provides following practical
Application scenarios.By taking three level sensing devices as an example, correspond to high liquid level setting value and low liquid level setting value.Fig. 3 is referred to, is schemed
3 be a kind of logical schematic of the virtual protection method based on boiler vapor liquid level disclosed by the embodiments of the present invention；Wherein H1,
H2, H3 correspond respectively to the high liquid level detection signal of each level sensing device output, and QF1, QF2, QF3 are corresponded respectively to every
The fault detection signal of a level sensing device.TON is that delay disposal is carried out to each level sensing signal, and NOT is to through prolonging
The fault detection signal handled late carries out inverse.AND is to through NOT treated fault detection signal and high liquid level detection letter
Number carry out and operation.OR is to the progress of each fault detection signal or operation.AND gate and the OR signals exported are selected,
If there are when two or three echo signals, export control signal MFT signal control in AND gate and total signal of OR output
Boiler processed stops operating.
Fig. 4 is referred to, Fig. 4 is another virtual protection method based on boiler vapor liquid level disclosed by the embodiments of the present invention
Logical schematic；
Fig. 3 is referred to, Fig. 3 is another scanning detection apparatus signal based on network behavior provided in an embodiment of the present invention
Figure, wherein L1, L2, L3 correspond respectively to the low liquid level detection signal of each level sensing device output, QF1, QF2, QF3,
Correspond respectively to the fault detection signal of each level sensing device.TON is to carry out delay disposal to each level sensing signal,
NOT is to carry out inverse to the fault detection signal of delayed processing.AND be to through NOT treated fault detection signal and
High liquid level detects signal progress and operation.OR is to the progress of each fault detection signal or operation.By AND gate and the OR letters exported
It number is selected, is believed if existing in AND gate and total signals of OR output and when two or three echo signals, exporting control
Number MFT signal control boiler stops operating.
A kind of virtual protection method based on boiler vapor liquid level provided herein is described in detail above.
Specific examples are used herein to illustrate the principle and implementation manner of the present application, and the explanation of above embodiments is only used
The present processes and its core concept are understood in help.It should be pointed out that for those skilled in the art,
Under the premise of not departing from the application principle, can also to the application, some improvement and modification can also be carried out, these improvement and modification
It falls into the protection scope of the claim of this application.
Each embodiment is described in a progressive manner in specification, the highlights of each of the examples are with other realities
The difference of example is applied, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
Speech, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is referring to method part illustration
?.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
Claims (8)
1. a kind of virtual protection method based on boiler vapor liquid level, which is characterized in that including：
Obtain the output of multiple level sensing devices level sensing signal and failure corresponding with each level sensing device
Detect signal；The level sensing signal is actual liquid level and the comparison signal for setting liquid level；
Operation relevant with inverse is carried out to each fault detection signal respectively and obtains the first signal；
Will and the corresponding level sensing signal of each level sensing device and corresponding with each level sensing device described
First signal carries out obtaining second signal with operation；
Each fault detection signal is carried out or operation obtains third signal；
Wherein, if the third signal is described there are when at least one non-described echo signal in each second signal
Echo signal；
Judge whether each second signal and the quantity of the echo signal in the third signal are greater than 1；
If so, output control signal is stopped operating with controlling boiler；
If it is not, then being acted without any so that the normal operation of boiler to the boiler.
2. the virtual protection method according to claim 1 based on boiler vapor liquid level, which is characterized in that described right respectively
Each fault detection signal carries out operation relevant with inverse and obtains the first signal：
The inverse is carried out to each fault detection signal respectively and obtains first signal.
3. the virtual protection method according to claim 1 based on boiler vapor liquid level, which is characterized in that described right respectively
Each fault detection signal carries out operation relevant with inverse and obtains the first signal：
The delay of predetermined time is carried out to each fault detection signal respectively；
First signal is obtained to each fault detection signal progress inverse after delayed.
4. the virtual protection method based on boiler vapor liquid level according to claim 1 to 3, which is characterized in that
The echo signal is specially high level signal.
5. the virtual protection method according to claim 4 based on boiler vapor liquid level, which is characterized in that the setting liquid
Position is high liquid level setting value, corresponding, when the actual liquid level is higher than the high liquid level setting value, the level sensing signal
It is then the high level signal.
6. the virtual protection method according to claim 5 based on boiler vapor liquid level, which is characterized in that the high liquid level
Setting value is specially 150mm.
7. the virtual protection method according to claim 4 based on boiler vapor liquid level, which is characterized in that the setting liquid
Position is low liquid level setting value, corresponding, when the actual liquid level is lower than the low liquid level setting value, the level sensing signal
It is then the high level signal.
8. the virtual protection method according to claim 7 based on boiler vapor liquid level, which is characterized in that the low liquid level
Setting value is specially -180mm.
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| CN201810480249.5A CN108916852B (en) | 2018-05-18 | 2018-05-18 | Logic protection method based on boiler drum liquid level |
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| 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 |
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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 |
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| Publication number | Publication date |
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| CN108916852B (en) | 2020-03-27 |
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