CN106909801A - Calculate the method and system of the effective small hourly value of gaseous contaminant - Google Patents
Calculate the method and system of the effective small hourly value of gaseous contaminant Download PDFInfo
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- CN106909801A CN106909801A CN201710248561.7A CN201710248561A CN106909801A CN 106909801 A CN106909801 A CN 106909801A CN 201710248561 A CN201710248561 A CN 201710248561A CN 106909801 A CN106909801 A CN 106909801A
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Abstract
The present invention relates to gaseous contaminant process field, disclose a kind of present invention and a kind of method of the effective small hourly value for calculating gaseous contaminant is provided, the method includes:The reduced value of accumulative gas pollutant concentration of emission, to obtain accumulative reduced value;The accumulative reduced value to gas pollutant concentration of emission carries out the accumulative time, to obtain the cumulative time;And the effective small hourly value of gas pollutant is calculated according to the accumulative reduced value and the accumulated time.Another aspect of the present invention also provides a kind of system of the effective small hourly value for calculating gaseous contaminant, the method and system can accurately calculate the effective small hourly value of gaseous contaminant, so as to realize the control of the effective small hourly value to gaseous contaminant discharge, it is ensured that the discharge capacity of gas pollutant meets discharge index.
Description
Technical field
The present invention relates to gaseous contaminant process field, in particular it relates to a kind of effective hour for calculating gaseous contaminant
The method and system of average.
Background technology
During power plants generating electricity, it is difficult to flue gas can be produced with avoiding, the dirts such as sulphur or nitrogen oxide are usually contained in flue gas
Metachromia gas.Needed to process the gaseous contaminant in flue gas before these flue gases are discharged, otherwise will severe contamination
Environment, and《Fixed pollution source smoke discharge continuous monitoring technical specification》Also to the sulfur dioxide in flue gas, carbon dioxide etc.
The effective small hourly value of gaseous contaminant has carried out strict regulation.According to the technical specification, effective hour of gaseous contaminant
Average is the arithmetic mean of instantaneous value of the valid data no less than 45 minutes in integral point 1 hour.
In the prior art, it is the conversion of real-time discharge capacity to the desired value of the control of gaseous contaminant discharge capacity in flue gas
Value, technical staff to the positive row monitor in real time of effective small hourly value of gaseous contaminant discharge, thus cannot not be effective to ensure that
The overall treatment effeciency of whole boiler, cannot guarantee that environment protection emission and the various examinations of qualified discharge are indicated.
The content of the invention
It is an object of the invention to provide it is a kind of calculate gaseous contaminant effective small hourly value method and system, method and
System can accurately calculate the effective small hourly value of gaseous contaminant such that it is able to realize to the effective small of gaseous contaminant discharge
The control of hourly value, it is ensured that the discharge capacity of gas pollutant meets discharge index.
To achieve these goals, the present invention provides a kind of method of the effective small hourly value for calculating gaseous contaminant, should
Method includes:The reduced value of accumulative gas pollutant concentration of emission, to obtain accumulative reduced value;It is accumulative that gas pollutant is discharged
The reduced value of concentration carries out the accumulative time, to obtain the cumulative time;And during according to the accumulative reduced value and the accumulation
Between be worth calculate gas pollutant effective small hourly value.
Wherein, the reduced value of the accumulative gas pollutant concentration of emission, can be included with obtaining accumulative reduced value:Detection
The actual discharge concentration of gas pollutant;And the reduced value is calculated according to the actual discharge concentration.
Wherein, it is described to be included calculating institute according to below equation according to the actual discharge concentration calculating reduced value
State reduced value:
C=c ' × (a '/a)
Wherein, c is the sulfur dioxide emissioning concentration after conversion, and c ' is the sulfur dioxide and concentration of emission of actual measurement, and a ' is real
The excess air coefficient of survey, a is the excess air coefficient of regulation.
Wherein, the method can also include:When the cumulative time scheduled time is reached, make the cumulative time and institute
Accumulative reduced value is stated to reset.
Wherein, the method can also include:Hand-reset is carried out to the accumulated time and the accumulation reduced value.
A kind of system of the effective small hourly value for calculating gaseous contaminant is also provided according to another aspect of the present invention, and this is
System includes:Reduced value accumulation module, the reduced value for adding up gas pollutant concentration of emission, to obtain accumulative reduced value;When
Between accumulation module, for adding up to carry out the accumulative time to the reduced value of gas pollutant concentration of emission, to obtain the cumulative time;
And effective hour mean value computation module, for calculating gas pollutant according to the accumulative reduced value and the accumulated time value
Effective small hourly value.
Wherein, the reduced value accumulation module can include:Actual discharge concentration acquisition module, for detecting gaseous contamination
The actual discharge concentration of thing;And reduced value computing module, for calculating the reduced value according to the actual discharge concentration.
Wherein, the reduced value computing module can calculate the reduced value according to below equation:
C=c ' × (a '/a)
Wherein, c is the sulfur dioxide emissioning concentration after conversion, and c ' is the sulfur dioxide and concentration of emission of actual measurement, and a ' is real
The excess air coefficient of survey, a is the excess air coefficient of regulation.
Wherein, the system can also include:Automatically reset module, for when the cumulative time scheduled time is reached,
The cumulative time and the accumulative reduced value is set to reset.
Wherein, the system can also include:Hand-reset module, for the accumulated time and the accumulation reduced value
Carry out hand-reset.
By above-mentioned technical proposal, it is capable of the effective small hourly value of real-time monitoring gaseous contaminant, so as to gaseous contamination
The treatment ground Cheng Jinhang real-time controls of thing, can ensure gas pollutant on the basis of ensureing that gas pollutant discharge capacity is up to standard
The economy for the treatment of.Also, the computing function of above-mentioned technical proposal is realized convenient, it is not necessary to locating by increasing extra equipment
Used in the control system of process gases pollutant, thus also had the advantages that easy to spread.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute the part of specification, with following tool
Body implementation method is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the flow chart of the method for the effective small hourly value of calculating gaseous contaminant according to an embodiment of the invention;
Fig. 2 is the flow of the method for the effective small hourly value of calculating gaseous contaminant according to another embodiment of the present invention
Figure;
Fig. 3 is the flow of the method for the effective small hourly value of calculating gaseous contaminant according to another embodiment of the present invention
Figure;
Fig. 4 is the structure of the system of the effective small hourly value of calculating gaseous contaminant according to another embodiment of the present invention
Figure;
Fig. 5 is the structure of the system of the effective small hourly value of calculating gaseous contaminant according to another embodiment of the present invention
Figure;
Fig. 6 is the algorithm knot of the reduced value that utilization SAMA algorithms according to another embodiment of the present invention calculate gaseous contaminant
Composition;
Fig. 7 is the structure of the system of the effective small hourly value of calculating gaseous contaminant according to another embodiment of the present invention
Figure;And
Fig. 8 is the structure of the system of the effective small hourly value of calculating gaseous contaminant according to another embodiment of the present invention
Figure
Description of reference numerals
10:Reduced value accumulation module 11:Actual discharge concentration acquisition module
12:Reduced value computing module 20:Time cumulation module
30:Effective hour mean value computation module 40:Automatically reset module
50:Hand-reset module 61:Actual discharge concentration input module
62:Actual discharge concentration input module 63:Oxygen content input module
64:Summation algoritic module 65:First divider algoritic module
66:Second analog quantity generating algorithm module 67:Second divider algoritic module
68:Multiplier algoritic module 69:First output module
81:Soft keyboard algoritic module 82:The negated algoritic module of first logic
83:Logical AND algoritic module 84:Pulse device algoritic module
85:The negated algoritic module 86 of second logic:Reduced value input module
87:First analog quantity Cumulate algorithm module 88:3rd divider algoritic module
89:Effective small hourly value output module 810:3rd analog quantity generation module
811:Second analog quantity Cumulate algorithm module 812:4th analog quantity maker algoritic module
813:5th analog quantity maker algoritic module 814:Analog quantity switches selection algorithm module
Specific embodiment
Specific embodiment of the invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
Fig. 1 is the flow chart of the method for the effective small hourly value of calculating gaseous contaminant according to an embodiment of the invention.
As shown in figure 1, the method is comprised the following steps:
In step s 110, the reduced value of gas pollutant concentration of emission is added up, to obtain accumulative reduced value.According to《Gu
Determine pollution sources fume emission continuous monitoring technical specification》Definition to effective small hourly value, the effectively discharge of gaseous contaminant is dense
It is the reduced value of gaseous contaminant concentration of emission to spend, and so-called reduced value is the actual discharge concentration that will be surveyed with excess air coefficient
Concentration of emission after being converted.Effective small hourly value is that the arithmetic of the concentration of emission no less than 45 minutes in integral point 1 hour is put down
Average, it is therefore desirable to which the reduced value to gas pollutant concentration of emission adds up.
In the step s 120, add up to carry out the accumulative time to the reduced value of gas pollutant concentration of emission, it is tired to obtain
Between timing.According to《Fixed pollution source smoke discharge continuous monitoring technical specification》Effectively there is the regulation of hourly value to calculating, to gas
The row accumulative time should be not less than the predetermined time during reduced value of body pollution thing concentration of emission, such as current is defined as 45
Minute.Within the scheduled time, while the reduced value to concentration of emission carries out accumulative, also to the conversion of the accumulative concentration of emission
The time of value is added up.
In step s 130, the effective small of gas pollutant is calculated according to the accumulative reduced value and the accumulated time value
Hourly value.With accumulative reduced value effective small hourly value can be calculated divided by accumulated time value.
Fig. 2 is the flow of the method for the effective small hourly value of calculating gaseous contaminant according to another embodiment of the present invention
Figure.In fig. 2, with step S120, step S240 is with step S130 for step S230.As shown in Fig. 2 the method can also include with
Lower step:
In step S210, the actual discharge concentration of gas pollutant is detected;
In step S220, the reduced value is calculated according to the actual discharge concentration.Wherein it is possible to according to below equation
1 calculates the reduced value:
Formula 1:
C=c ' × (a '/a)
Wherein, c is the sulfur dioxide emissioning concentration after conversion, and c ' is the sulfur dioxide and concentration of emission of actual measurement, and a ' is real
The excess air coefficient of survey, a is the excess air coefficient of regulation.The excess air coefficient of regulation is a for example in coal-burning boiler
=1.4.
The excess air coefficient of actual measurement is calculated after can measuring the oxygen content in flue gas according to equation 2 below:
Formula 2:
Wherein, XO2It is the percent by volume of oxygen in flue gas.
Fig. 3 is the flow of the method for the effective small hourly value of calculating gaseous contaminant according to another embodiment of the present invention
Figure.In figure 3, step S310~step S340 is successively with step S210~step S240.As shown in figure 3, the method can be with
Comprise the following steps:
In step S350, judge whether the current cumulative time reaches the scheduled time, when the current cumulative time reach it is pre-
Step S370 is gone to when fixing time, to be automatically reset.If for example, the scheduled time is set to 1 hour, when the scanning of system
When cycle is 1s, i.e., when row tires out value when in units of 1s to reduced value, when the cumulative time 3600s is reached, make accumulative reduced value
Resetted with the cumulative time.
Wherein, any time point that effectively small hourly value can be before reset is calculated according to accumulative reduced value and cumulative time
Calculated, when being less than 45 minutes the cumulative time, although the effective small hourly value for calculating is unsatisfactory for above-mentioned technical specification
In requirement, but the calculated value can as to gaseous state thing dye thing carry out process control reference.Thus, it is possible to anti-in real time
The effective small hourly value of gaseous contaminant is answered, thus is conducive to processing procedure of the control to gaseous contaminant in time.
In step S360, hand-reset signal is judged whether, if it is present step S370 is gone to, to carry out
Hand-reset.Soft keyboard can be for example set, when needing to carry out hand-reset, respective keys are pressed, system is received accordingly
So that accumulative reduced value and accumulated time value reset by after the signal that button is pressed.
In step S370, the cumulative time and the accumulative reduced value is set to reset.
Fig. 4 is the structure of the system of the effective small hourly value of calculating gaseous contaminant according to another embodiment of the present invention
Figure.As shown in figure 4, the system includes:Reduced value accumulation module 10, the reduced value for adding up gas pollutant concentration of emission,
To obtain accumulative reduced value;Time cumulation module 20, for adding up to add up the reduced value of gas pollutant concentration of emission
Time, to obtain the cumulative time;And effective hour mean value computation module 30, for according to the accumulative reduced value and described
Accumulated time value calculates the effective small hourly value of gas pollutant.
Fig. 5 is the structure of the system of the effective small hourly value of calculating gaseous contaminant according to another embodiment of the present invention
Figure.As shown in figure 5, the reduced value accumulation module 10 can include:Actual discharge concentration acquisition module 11, for detecting gas
The actual discharge concentration of pollutant;And reduced value computing module 12, for calculating the folding according to the actual discharge concentration
Calculation value.
Wherein, the reduced value computing module is calculated according to above-mentioned formula 1.
Fig. 6 is the algorithm knot of the reduced value that utilization SAMA algorithms according to another embodiment of the present invention calculate gaseous contaminant
Composition.SAMA figures are the legends that American science instrument manufacturing association promulgates, are current control engineering drawings widely used in the world
One of example.SAMA figures are the control system architecture figure for including all control instruments, SAMA legends it can be readily appreciated that can clearly show that
Systemic-function, it reflects whole control functions and signal processing function of control system, and its SAMA algorithm is with specific function
SAMA legend program modules.
As shown in fig. 6, surveying the actual discharge concentration of gaseous contaminant in flue gas by actual discharge concentration input module 61
Input, the oxygen content in flue gas is input into by oxygen content input module 63, the formation constant 21 of the first analog quantity generating algorithm module 62,
The excess air coefficient value of the generation regulation of the second analog quantity generating algorithm module 66, such as coal-burning boiler, formation constant
1.4.Summation algoritic module 64 carries out computing (21-XO2), the first divider algoritic module 65 carries out the computing of above-mentioned formula 2, the
Double division method device algoritic module 67 carries out computing (a '/a), and multiplier algoritic module 68 carries out the calculating of above-mentioned formula 1.It is final the
One output module 69 exports the reduced value of gaseous contaminant concentration of emission.
Fig. 7 is the structure of the system of the effective small hourly value of calculating gaseous contaminant according to another embodiment of the present invention
Figure.
As shown in fig. 7, the module 40 that automatically resets, described accumulative for when the cumulative time scheduled time is reached, making
Time and the accumulative reduced value reset.
Wherein, the system can also be preferably included:Hand-reset module 50, for the accumulated time and described tired
Product reduced value carries out hand-reset.
Fig. 8 is the structure of the system of the effective small hourly value of calculating gaseous contaminant according to another embodiment of the present invention
Figure.As shown in figure 8, being effective hour that the calculating gaseous contaminant is realized using target standard SAMA algorithms in DCS system
The algorithm structure figure of the system of average.
In fig. 8, concentration of emission reduced value is input into from reduced value input module 86, the first analog quantity Cumulate algorithm module 37
Reduced value is added up, accumulated result is accumulation reduced value.The scanning week of the generation system of the 3rd analog quantity generation module 810
Phase, for example, 1s can be generated, now the first analog quantity Cumulate algorithm module is once added up in units of 1s to reduced value, the
Two analog quantity Cumulate algorithm modules 811 are carried out when the first analog quantity Cumulate algorithm module 87 often adds up a reduced value to the time
Accumulative, its accumulative result is the cumulative time.3rd divider algoritic module 88 makes accumulative reduced value divided by cumulative time, gained
Result is effective small hourly value, and the effectively small hourly value is exported by effective small hourly value output module 89.
Wherein, in the embodiment shown in fig. 8, the 4th analog quantity maker algoritic module 812 is used to set described predetermined
Time, for example, 3600s is could be arranged to, the setting value of the 5th analog quantity maker algoritic module 813 is 0, when analog quantity switching
When the input signal of selection algorithm module 814 is 0, analog quantity switching selection algorithm module 814 exports the 5th analog quantity maker
The value of the setting of algoritic module 813, when the input signal of analog quantity switching selection algorithm module 814 is 1, analog quantity switching selection
Algoritic module 814 exports the value set by the 4th analog quantity maker algoritic module 812.Wherein logical AND algoritic module 83 is by
The output of the negated algoritic module 85 of two logics feeds back to the input of pulse device algoritic module 84.
When needing to carry out hand-reset to system, soft keyboard algoritic module 81 is pressed, make its output signal 1, the signal
By after the negated algoritic module 82 of the first logic by it is negated be signal 0, the input of now analog quantity switching selection algorithm module 814
Signal is 0, therefore the output signal 0 of analog quantity switching selection algorithm module 814, and the output signal 0 is by pulse device algorithm mould
The negated algoritic module 85 of the logic of block 84 and second is final in the analog quantity of the second analog quantity Cumulate algorithm module 811 first after processing
The RESET input (Reset) input 1 of Cumulate algorithm module 87, the now simulation of the second analog quantity Cumulate algorithm module 811 first
Amount Cumulate algorithm module 87 is reset.Hand-reset function is achieved in, with when Accumulated deviation occurs in system or other needs
Hand-reset is carried out to system during hand-reset.Soft keyboard algoritic module 81 can also be pressed as the starter of system
The activation system of soft keyboard algoritic module 81, makes the system start to calculate effectively small hourly value.
When soft keyboard algoritic module 81 is not pressed, its output signal is 0, and the signal is by the negated algorithm of the first logic
After module 82 by it is negated be signal 1, the input signal of now analog quantity switching selection algorithm module 814 is 1, therefore analog quantity is cut
The scheduled time set by the 4th analog quantity maker algoritic module 812 of output of selection algorithm module 814 is changed, for example
3600s, is now added up, by the pulse-width of pulse device algoritic module 84 when its pulse width is not up to 3600s
Continue output signal 1, the signal crosses the negated rear output 0 of the negated algoritic module 85 of the second logic, and now the second analog quantity accumulation is calculated
The input of the RESET input (Reset) of the analog quantity Cumulate algorithm module 87 of method module 811 first is 0, therefore the accumulative folding
Calculation value and cumulative time will not be reset.And when the pulse width of pulse device algoritic module 84 is accumulated to 3600, pulse
Device algoritic module 84 exports low level, and output 1 after the negated algoritic module 85 of the second logic is negated, now the second analog quantity accumulation is calculated
The input of the RESET input (Reset) of the analog quantity Cumulate algorithm module 87 of method module 811 first is 1, the accumulative reduced value
It is automatically reset with the cumulative time.It is achieved in the auto-reset function of system.
In order to the environment protection standard for ensureing unit is discharged, the system effective gaseous contaminant discharge for operations staff provides
The monitoring data of concentration, improve the economy of gaseous contaminant processing procedure, are calculated by using the existing control of DCS system
Method, and based on SAMA rudimentary algorithm modules, rationally build logic control algorithm, realize effective small hourly value automatic calculating and
Hand-reset control function.The computing function of the system is realized convenient, it is not necessary to increase miscellaneous equipment and algorithm, application of result is pushed away
It is wide convenient.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, but, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in range of the technology design of the invention, various letters can be carried out to technical scheme
Monotropic type, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy is no longer separately illustrated.
Additionally, can also be combined between a variety of implementation methods of the invention, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (10)
1. it is a kind of calculate gaseous contaminant effective small hourly value method, it is characterised in that the method includes:
The reduced value of accumulative gas pollutant concentration of emission, to obtain accumulative reduced value;
The accumulative reduced value to gas pollutant concentration of emission carries out the accumulative time, to obtain the cumulative time;And
The effective small hourly value of gas pollutant is calculated according to the accumulative reduced value and the accumulated time.
2. the method for the effective small hourly value for calculating gaseous contaminant according to claim 1, it is characterised in that described tired
The reduced value of gas pollutant concentration of emission is counted, is included with obtaining accumulative reduced value:
Detect the actual discharge concentration of gas pollutant;And
The reduced value is calculated according to the actual discharge concentration.
3. it is according to claim 2 calculate gaseous contaminant effective small hourly value method, it is characterised in that described
Calculating the reduced value according to the actual discharge concentration includes:
The reduced value is calculated according to below equation:
C=c ' × (a '/a)
Wherein, c is the sulfur dioxide emissioning concentration after conversion, and c ' is the sulfur dioxide and concentration of emission of actual measurement, and a ' is actual measurement
Excess air coefficient, a is the excess air coefficient of regulation.
4. it is according to claim 1 calculate gaseous contaminant effective small hourly value method, it is characterised in that the method
Also include:
When the cumulative time scheduled time is reached, the cumulative time and the accumulative reduced value is set to reset.
5. according to any one of claim 1-4 calculating gaseous contaminant effective small hourly value method, its feature
It is that the method also includes:
Hand-reset is carried out to the accumulated time and the accumulation reduced value.
6. it is a kind of calculate gaseous contaminant effective small hourly value system, it is characterised in that the system includes:
Reduced value accumulation module, the reduced value for adding up gas pollutant concentration of emission, to obtain accumulative reduced value;
Time cumulation module, it is tired to obtain for adding up to carry out the accumulative time to the reduced value of gas pollutant concentration of emission
Between timing;And
Effective hour mean value computation module, for calculating gas pollutant according to the accumulative reduced value and the accumulated time
Effective small hourly value.
7. it is according to claim 6 calculate gaseous contaminant effective small hourly value system, it is characterised in that the folding
Calculation value accumulation module includes:
Actual discharge concentration acquisition module, the actual discharge concentration for detecting gas pollutant;And
Reduced value computing module, for calculating the reduced value according to the actual discharge concentration.
8. it is according to claim 7 calculate gaseous contaminant effective small hourly value system, it is characterised in that the folding
Calculation value computing module calculates the reduced value according to below equation:
C=c ' × (a '/a)
Wherein, c is the sulfur dioxide emissioning concentration after conversion, and c ' is the sulfur dioxide and concentration of emission of actual measurement, and a ' is actual measurement
Excess air coefficient, a is the excess air coefficient of regulation.
9. it is according to claim 6 calculate gaseous contaminant effective small hourly value system, it is characterised in that the system
Also include:
Automatically reset module, for when the cumulative time scheduled time is reached, making the cumulative time and the accumulative folding
Calculation value resets.
10. according to any one of claim 6-9 calculating gaseous contaminant effective small hourly value system, its feature
It is that the system also includes:
Hand-reset module, for carrying out hand-reset to the accumulated time and the accumulation reduced value.
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CN113069919A (en) * | 2021-04-27 | 2021-07-06 | 国能南京电力试验研究有限公司 | Method for calculating continuous hourly mean value of NOx concentration |
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