CN103439468A - Method for indirectly monitoring oxygen content in industrial furnace group - Google Patents
Method for indirectly monitoring oxygen content in industrial furnace group Download PDFInfo
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- CN103439468A CN103439468A CN2013104049474A CN201310404947A CN103439468A CN 103439468 A CN103439468 A CN 103439468A CN 2013104049474 A CN2013104049474 A CN 2013104049474A CN 201310404947 A CN201310404947 A CN 201310404947A CN 103439468 A CN103439468 A CN 103439468A
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Abstract
The invention discloses a method for indirectly monitoring oxygen content in an industrial furnace group. According to the method, sample data of an oxygen analyzer are analyzed, the judgment of ending a sampling switching process is completed by adopting a time and data combination drive method, and then the problem of sample data missing caused by alternative sampling in an oxygen monitoring system is solved by using a difference value average strategy. By adopting the method, indirect monitoring that the oxygen analyzer alternatively samples oxygen contents in oxygen monitoring systems of multiple industrial furnaces can be realized.
Description
Technical field
The present invention relates to oxygen content indirect monitoring technology in the industrial furnace monitoring system, this technology relates to a kind of monitoring technology by many industrial furnace oxygen contents of an oxygen analyser alternating sampling.
Background technology
More and more pay attention to the problems such as industrial energy saving and environmental protection along with China, its monitoring requirement of real-time to large and medium-sized enterprise's industrial furnace operation conditions is more and more higher.In a large amount of existing industrial furnace supervisory systems, what in situation, its supervisory system was mainly considered mostly is the technological requirement of industrial furnace combustion process, for energy consumption and burning efficiency, does not take into full account.Therefore, in the process to industrial furnace combustion position monitoring system transformation, adopt online oxygen analyser to be sampled to industrial furnace, realize that real-time monitoring to industrial furnace is to improve burning efficiency.At present, in the monitoring system that many industrial furnace oxygen contents of an oxygen analyser alternating sampling are arranged, there is no a kind of suitable method for solving judgement and the sampling process shortage of data problem in alternating sampling process sampling switching.
Summary of the invention
The objective of the invention is the problems referred to above that exist for solving prior art, a kind of industrial furnace group oxygen content indirect monitoring method is provided.
The zirconia that the inventive method is installed at ad-hoc location according to technological requirement by the industrial furnace group and be the oxygen analyser of energy consumption monitoring installation, determine the statistics rule between the oxygen content that zirconia and oxygen analyser detect respectively, form a kind of based on data and time combination drive and difference Average Strategy, realization is to the industrial furnace sample handoff procedure oxygen content indirect monitoring of mining massively, and the method comprises the following steps:
1, a kind of industrial furnace group oxygen content indirect monitoring method, it is characterized in that, the zirconia that the method is installed at ad-hoc location according to technological requirement by the industrial furnace group and be the oxygen analyser of energy consumption monitoring installation, determine the statistics rule between the oxygen content that zirconia and oxygen analyser detect respectively, form the combination drive method of a kind of time-based and data, the oxygen analyser sampled data is analyzed to sampling time and the rule relation between sampled data and the difference Average Strategy drawn.Realization is the indirect monitoring for oxygen content in the sampling handoff procedure to the industrial furnace flock-mate, comprises the following steps:
The 1st step, the oxygen content of utilizing Mind on statistics to detect respectively zirconia and oxygen analyser are analyzed
After the 1.1st step, the sample of industrial furnace being mined massively at oxygen analyser complete one-period, sampled value to this cycle of oxygen analyser is analyzed, judge the residing stabilized zone of sampled value in the time of can normally reflecting industrial furnace Actual combustion situation, thereby determine that the analyser sampled value is started through peak value to the time of experiencing when the stabilized zone by sampling
;
The 1.2nd step, when the oxygen analyser sampled value, during in stabilized zone, calculate the poor of synchronization oxygen analyser sampled value and zirconia sampled value
,
,
mean that data start in stabilized zone to finish the oxygen analyser sampling number to sampling;
The 1.3rd step, according to the analysis of oxygen analyser sampled data, determine the oxygen analyser sampled value in the stabilized zone time difference value
maximal value and minimum value scope
;
The 2nd step, employing time and data mixing drive method to be judged the end of sampling handoff procedure
When the 2.1st step, oxygen analyser are sampled again to selected industrial furnace, in the oxygen monitoring system, time delay
sampled afterwards;
After the 2.2nd step, oxygen monitoring system start sampling, calculate the poor of synchronization oxygen analyser sampled value and zirconia sampled value
,
,
expression from
constantly sampling starts to be switched and determined to sampling that to finish be oxygen analyser sampled value oxygen analyser sampling number can truly reflect the industrial furnace oxygen content time;
The 2.3rd step, according to the difference range determined in the 1.3rd step
, to calculating each of gained
the size of value is judged according to the 2.4th and the 2.5th step;
If the 2.4th step
, continue difference
judged;
If the 2.5th step
, think that this moment oxygen analyser sampled value can reflect this industrial furnace Actual combustion situation, the sampling handoff procedure is judged end, in the oxygen monitoring system, each oxygen content value constantly of industrial furnace is the oxygen analysis actual sample value.
The 3rd step, employing difference strategy carry out indirect monitoring to the missing data of sampling process
The 3.1st step, after the sampling handoff procedure judge to finish, when in the oxygen monitoring system, the industrial furnace oxygen content is the oxygen analyser actual sample value, continue to calculate the poor of synchronization oxygen analyser sampled value and zirconia sampled value
,
,
expression is switched and determined and finishes to finish the oxygen analyser sampling number to the sampling process to this industrial furnace from sampling;
The 3.2nd step, when oxygen analyser finishes this industrial furnace sampling process, calculate whole differences in the oxygen monitoring system
mean value
;
The 3.3rd step, when oxygen analyser is switched to the sampling of another industrial furnace, this industrial furnace oxygen content in the oxygen monitoring system
with zirconia sampled value and the difference mean value calculated
sum means.
advantage of the present invention and beneficial effect
The technical scheme adopted by the invention described above can be found out, this method adopts time and data mixing to drive and the difference averaging method, complete the indirect monitoring to oxygen content in industrial furnace sampling handoff procedure, the method has higher practicality for the system by an oxygen analyser alternating sampling industrial furnace group oxygen content.
The accompanying drawing explanation
Fig. 1 is oxygen analyser sampling process flow diagram.
Fig. 2 is the oxygen analyser working timing figure.
Fig. 3 is oxygen analyser sampled value change curve.
Fig. 4 is oxygen content difference change curve.
Fig. 5 is sampling handoff procedure decision flowchart.
Fig. 6 is difference method of average calculation flow chart.
Fig. 7 is system displayed value and analyser sampled value correlation curve figure.
Embodiment
The concrete steps of industrial furnace group oxygen content indirect monitoring method provided by the invention are as follows:
The 1st step, the oxygen content of utilizing Mind on statistics to detect respectively zirconia and oxygen analyser are analyzed
Fig. 1 is system oxygen analyser sampling process flow diagram, adopt two industrial furnace oxygen contents of an oxygen analyser alternating sampling in the oxygen monitoring system, each sampling process maintains 30 minutes, after oxygen analyser has been sampled to an industrial furnace oxygen content, be switched to another industrial furnace is sampled through blowback, gas storage process, in blowback, gas storage process, in oxygen analyser, mixed air.Therefore, when oxygen analyser is switched to when another industrial furnace oxygen content is sampled, initial analyser sampled value can not truly reflect the Actual combustion situation of industrial furnace.
Fig. 2 is the oxygen analyser working timing figure,
the sampled value that means oxygen analyser is passed through the time that peak value extremely experiences when stabilized zone by starting to sample.
mean the oxygen analyser sampling handoff procedure judgement period.Within this period, oxygen analyser has been switched to is sampled to an industrial furnace, but because analyser experiences blowback, gas storage process in a upper sampling process, make the initial sampled value of analyser finally just enter stabilized zone by reaching gently peak value, and can not truly reflect the actual state of this industrial furnace burning.
mean that the analyser sampled value can truly reflect the industrial furnace combustion position period.
when the expression analyser is switched to another industrial furnace sampling after completing this industrial furnace being sampled, in the oxygen monitoring system, the period of sampled data disappearance appears in this industrial furnace.
Oxygen analyser sampled value change curve as shown in Figure 3, can roughly be judged sampled value by starting sampling through the peak value time required to stabilized zone according to curve map
it is 600 seconds.During in stabilized zone, calculate the poor of synchronization zirconia sampled value and oxygen analyser sampled value when sampled value
.The difference change curve as shown in Figure 4, is determined the analyser sampled value in the stabilized zone time difference value with this
minimum value and peaked scope
.
The judgement that the 2nd step, employing time and data mixing have driven the sampling handoff procedure to finish
As shown in Figure 2, the analyser sampling process in
in the time of in time period, according to the analysis to last cycle analyser sampled value change curve, utilize time and the data mixing driving method handoff procedure of being sampled to judge.Fig. 5 is sample handoff procedure decision flowchart, wherein,
for the oxygen analyser sampled value,
expression from
sampling constantly starts to be switched and determined and to finish to sampling, oxygen analyser sampling number when the oxygen analyser sampled value can truly reflect the industrial furnace oxygen content;
for the oxygen content of zirconia collection,
before be switched and determined finishing in sampling, within every 1 second, calculate the poor of zirconia collection value once and oxygen analyser sampled value,
for industrial furnace oxygen content displayed value in the oxygen monitoring system.
Concrete operation step is described below.When oxygen analyser is sampled to this industrial furnace, postpone after 600 seconds to be sampled again, within every 1 second, calculate the poor of primary oxygen analyser sampled value and zirconia sampled value during in stabilized zone in sampled value
, and this difference size is judged, until
, draw
.Now, think that the oxygen analyser sampled value can normally reflect the Actual combustion situation of this industrial furnace, oxygen content displayed value in the oxygen monitoring system
for the actual sample value of oxygen analyser, the sampling handoff procedure is judged end.
The 3rd step, employing difference strategy carry out indirect monitoring to the missing data of sampling process
As shown in Figure 2,
mean that oxygen analyser completes and is switched to when another industrial furnace is sampled the sampling of this industrial furnace, the time period of shortage of data phenomenon appears in this industrial furnace.Analyzed according to the sampled data to the last cycle, adopt the difference Average Strategy to carry out indirect monitoring to the sampled data disappearance process of this industrial furnace.
Concrete operation step is as follows.Fig. 6 is difference method of average calculation flow chart.After monitoring system completes the judgement to the sampling handoff procedure, during actual sample value that the monitoring system displayed value is oxygen analyser, in this sampling process, system proceeds as follows:
(1)
Wherein,
mean the rear oxygen analyser sampled value of sampling handoff procedure judgement,
mean phase zirconia collection value in the same time,
mean to calculate in every 1 second the poor of oxygen analyser sampled value once and zirconia sampled value,
expression from the sampling handoff procedure judge to finish to the sampling number of rear oxygen analyser that this industrial furnace has been sampled.This periodic sampling data analysis is obtained
, when oxygen analyser finishes to this heating furnace is sampled from sampling is switched and determined, sampled altogether 1200 times.
After oxygen analyser is switched to another industrial furnace is sampled, the system oxygen content value of this industrial furnace
meet following relational expression:
As shown in Fig. 7 system displayed value and analyser sampled value correlation curve figure, by this method, monitoring system has completed the indirect monitoring to industrial furnace group oxygen content, and has very high practicality.Should use the same method and carry out indirect monitoring for the oxygen content of another industrial furnace.
The present invention is applicable to the system by an oxygen analyser alternating sampling industrial furnace group oxygen content, for similar system, has very high practicality.
Claims (1)
1. an industrial furnace group oxygen content indirect monitoring method, it is characterized in that, the zirconia that the method is installed at ad-hoc location according to technological requirement by the industrial furnace group and be the oxygen analyser of energy consumption monitoring installation, determine the statistics rule between the oxygen content that zirconia and oxygen analyser detect respectively, form the combination drive method of a kind of time-based and data, the oxygen analyser sampled data is analyzed to sampling time and the rule relation between sampled data and the difference Average Strategy drawn; Realization is the indirect monitoring for oxygen content in the sampling handoff procedure to the industrial furnace flock-mate, comprises the following steps:
The 1st step, the oxygen content of utilizing Mind on statistics to detect respectively zirconia and oxygen analyser are analyzed
After the 1.1st step, the sample of industrial furnace being mined massively at oxygen analyser complete one-period, sampled value to this cycle of oxygen analyser is analyzed, judge the residing stabilized zone of sampled value in the time of can normally reflecting industrial furnace Actual combustion situation, thereby determine that the analyser sampled value is started through peak value to the time of experiencing when the stabilized zone by sampling
;
The 1.2nd step, when the oxygen analyser sampled value, during in stabilized zone, calculate the poor of synchronization oxygen analyser sampled value and zirconia sampled value
,
,
mean that data start in stabilized zone to finish the oxygen analyser sampling number to sampling;
The 1.3rd step, according to the analysis of oxygen analyser sampled data, determine the oxygen analyser sampled value in the stabilized zone time difference value
maximal value and minimum value scope
;
The 2nd step, employing time and data mixing drive method to be judged the end of sampling handoff procedure
When the 2.1st step, oxygen analyser are sampled again to selected industrial furnace, in the oxygen monitoring system, time delay
sampled afterwards;
After the 2.2nd step, oxygen monitoring system start sampling, calculate the poor of synchronization oxygen analyser sampled value and zirconia sampled value
,
,
expression from
constantly sampling starts to be switched and determined to sampling that to finish be oxygen analyser sampled value oxygen analyser sampling number can truly reflect the industrial furnace oxygen content time;
The 2.3rd step, according to the difference range determined in the 1.3rd step
, to calculating each of gained
the size of value is judged according to the 2.4th and the 2.5th step;
If the 2.4th step
, continue difference
judged;
If the 2.5th step
, think that this moment oxygen analyser sampled value can reflect this industrial furnace Actual combustion situation, the sampling handoff procedure is judged end, in the oxygen monitoring system, each oxygen content value constantly of industrial furnace is the oxygen analysis actual sample value;
The 3rd step, employing difference strategy carry out indirect monitoring to the missing data of sampling process
The 3.1st step, after the sampling handoff procedure judge to finish, when in the oxygen monitoring system, the industrial furnace oxygen content is the oxygen analyser actual sample value, continue to calculate the poor of synchronization oxygen analyser sampled value and zirconia sampled value
,
,
expression is switched and determined and finishes to finish the oxygen analyser sampling number to the sampling process to this industrial furnace from sampling;
The 3.2nd step, when oxygen analyser finishes this industrial furnace sampling process, calculate whole differences in the oxygen monitoring system
mean value
;
The 3.3rd step, when oxygen analyser is switched to the sampling of another industrial furnace, this industrial furnace oxygen content in the oxygen monitoring system
with zirconia sampled value and the difference mean value calculated
sum means.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030120444A1 (en) * | 2001-08-13 | 2003-06-26 | Sempra Energy Solutions | System and method for environmental data acquisition |
| CN1485602A (en) * | 2002-09-26 | 2004-03-31 | 马克文 | Method and apparatus for measuring chimney heat exchanger air leakage ratio |
| CN103257205A (en) * | 2013-04-22 | 2013-08-21 | 鞍山翰玛传感技术有限公司 | Coke oven group oxynitride detection method |
-
2013
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030120444A1 (en) * | 2001-08-13 | 2003-06-26 | Sempra Energy Solutions | System and method for environmental data acquisition |
| CN1485602A (en) * | 2002-09-26 | 2004-03-31 | 马克文 | Method and apparatus for measuring chimney heat exchanger air leakage ratio |
| CN103257205A (en) * | 2013-04-22 | 2013-08-21 | 鞍山翰玛传感技术有限公司 | Coke oven group oxynitride detection method |
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