CN105116931A - Hydrogen control method and hydrogen control system for hydrogen-nitrogen mixing station - Google Patents
Hydrogen control method and hydrogen control system for hydrogen-nitrogen mixing station Download PDFInfo
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- CN105116931A CN105116931A CN201510430214.7A CN201510430214A CN105116931A CN 105116931 A CN105116931 A CN 105116931A CN 201510430214 A CN201510430214 A CN 201510430214A CN 105116931 A CN105116931 A CN 105116931A
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Abstract
The invention relates to the field of automation, and provides a hydrogen control method and a hydrogen control system for a hydrogen-nitrogen mixing station in order to solve the technical problem in the prior art that the dosage of mixed gas cannot be controlled accurately in the process of hydrogen-nitrogen mixing. The method comprises the following steps: detecting the measured flow value of hydrogen in obtained hydrogen-nitrogen mixed gas; acquiring the set flow value of hydrogen in the process of hydrogen-nitrogen mixing, calculating the deviation value between the obtained measured flow value and the set flow value; judging whether the deviation value is greater than a preset deviation value; and stopping the process of hydrogen-nitrogen mixing when the deviation value is greater than a preset deviation value. By adopting the method and the system, the flow of mixed gas can be controlled accurately.
Description
Technical field
The present invention relates to automatic field, particularly relate to a kind of hydrogen control method and system of hydrogen nitrogen hybrid station.
Background technology
Have strict requirement with steel thermal annealing process to furnace gas environment, technological requirement furnace pressure outline is higher than stove external pressure, and stove planted agent is full of the mixed gas of about 97% nitrogen and 3% hydrogen, namely protects gas.Hydrogen nitrogen mixed gas by the burner hearth that reinjects after correct proportions mixing, enters in stove to avoid air and makes band steel oxidation in hybrid station, and this is key one ring during annealing furnace controls.But, in prior art, accurately cannot control the consumption of mixed gas, thus there is the technical matters that gas consumption is too much, and also cause system response time long.
Summary of the invention
The invention provides a kind of hydrogen control method and system of hydrogen nitrogen hybrid station, to solve the technical matters cannot carrying out accurately control in prior art in hydrogen nitrogen mixed process to the consumption of mixed gas.
First aspect, the embodiment of the present invention provides a kind of hydrogen control method of hydrogen nitrogen hybrid station, comprising:
Detect the flow measurement value of the hydrogen obtained in hydrogen-nitrogen mixture gas;
Obtain the flow setting value of hydrogen in hydrogen nitrogen mixed process;
Calculate the deviate obtained between described flow measurement value and described flow setting value;
Judge whether described deviate is greater than predetermined deviation value;
When described deviate is greater than described predetermined deviation value, stop described hydrogen nitrogen mixed process.
Optionally, the flow setting value of hydrogen in described acquisition hydrogen nitrogen mixed process, specifically comprises:
Determine the volume fraction setting value of hydrogen described in described hydrogen nitrogen mixed process;
Determine the volume fraction corrected value of hydrogen described in described hydrogen nitrogen mixed process;
Determine the flow value of nitrogen in described hydrogen nitrogen mixed process;
Described flow setting value is determined by described volume fraction setting value, described volume fraction corrected value and described flow value.
Optionally, described flow setting value is determined by following formula:
Wherein,
represent described flow setting value;
represent described volume fraction setting value;
represent described volume fraction corrected value;
represent the flow value of described nitrogen.
Optionally, the described volume fraction corrected value determining hydrogen described in described hydrogen nitrogen mixed process, specifically comprises:
Determine the scale-up factor that described hydrogen is shared in described hydrogen-nitrogen mixture gas;
Determine correction coefficient;
Calculated by described correction coefficient and described scale-up factor and obtain described volume fraction corrected value.
Optionally, described volume fraction corrected value is obtained by following formulae discovery:
Wherein,
represent described volume fraction corrected value;
C
cORrepresent described correction coefficient;
Y
outrepresent described scale-up factor.
Optionally, after described stopping described hydrogen nitrogen mixed process, described method also comprises:
Produce warning message.
Second aspect, the embodiment of the present invention provides a kind of hydrogen control system of hydrogen nitrogen hybrid station, comprising:
Detection module, for detecting the flow measurement value of the hydrogen obtained in hydrogen-nitrogen mixture gas;
Acquisition module, for obtaining the flow setting value of hydrogen in hydrogen nitrogen mixed process;
Computing module, for calculating the deviate obtained between described flow measurement value and described flow setting value;
Judge module, for judging whether described deviate is greater than predetermined deviation value;
Stopping modular, for when described deviate is greater than described predetermined deviation value, stops described hydrogen nitrogen mixed process.
Optionally, described acquisition module, specifically comprises:
First determining unit, for determining the volume fraction setting value of hydrogen described in described hydrogen nitrogen mixed process;
Second determining unit, for determining the volume fraction corrected value of hydrogen described in described hydrogen nitrogen mixed process;
3rd determining unit, for determining the flow value of nitrogen described in described hydrogen nitrogen mixed process;
4th determining unit, for determining described flow setting value by described volume fraction setting value, described volume fraction corrected value and described flow value.
Optionally, described 4th determining unit specifically for, determine described flow setting value by following formula:
Wherein,
represent described flow setting value;
represent described volume fraction setting value;
represent described volume fraction corrected value;
represent the flow value of described nitrogen.
Optionally, described second determining unit, specifically comprises:
First determines subelement, for determining the scale-up factor that described hydrogen is shared in described hydrogen-nitrogen mixture gas;
Second determines subelement, for determining correction coefficient;
3rd determines subelement, obtains described volume fraction corrected value for being calculated by described correction coefficient and described scale-up factor.
Optionally, the described 3rd determines subelement, specifically for obtaining described volume fraction corrected value by following formulae discovery:
Wherein,
represent described volume fraction corrected value;
C
cORrepresent described correction coefficient;
Y
outrepresent described scale-up factor.
Optionally, described system also comprises:
Alarm module, for after the described hydrogen nitrogen mixed process of stopping, producing warning message.
Beneficial effect of the present invention is as follows:
Due in embodiments of the present invention, detect the flow measurement value of the hydrogen obtained in hydrogen-nitrogen mixture gas; Obtain the flow setting value of hydrogen in hydrogen nitrogen mixed process; Calculate the deviate obtained between described flow measurement value and described flow setting value; Judge whether described deviate is greater than predetermined deviation value; When described deviate is greater than described predetermined deviation value, stop described hydrogen nitrogen mixed process.That is, in hydrogen nitrogen mixed process, if the deviate between the flow measurement value of hydrogen and flow setting value is greater than predetermined deviation value, then stop hydrogen nitrogen mixed process, thus accurately can control the flow of mixed gas, and then also can reduce the consumption of gas, and system response time can be improved 10%.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the hydrogen control method of hydrogen nitrogen hybrid station in the embodiment of the present invention;
Fig. 2 is the process structure figure of hydrogen nitrogen hybrid station in the hydrogen control method of embodiment of the present invention hydrogen nitrogen hybrid station;
Fig. 3 is the process flow diagram determining the flow setting value of hydrogen in the hydrogen control method of embodiment of the present invention hydrogen nitrogen hybrid station;
Fig. 4 is the hydrogen consumption comparison diagram in each stage with steel thermal annealing in the application and prior art;
Fig. 5 is the structural drawing of the Hydrogen Controlling Device of hydrogen nitrogen hybrid station in the embodiment of the present invention.
Embodiment
The invention provides a kind of hydrogen control method and system of hydrogen nitrogen hybrid station, to solve the technical matters cannot carrying out accurately control in prior art in hydrogen nitrogen mixed process to the consumption of mixed gas.
Technical scheme in the embodiment of the present application is solve above-mentioned technical matters, and general thought is as follows:
Detect the flow measurement value of the hydrogen obtained in hydrogen-nitrogen mixture gas; Obtain the flow setting value of hydrogen in hydrogen nitrogen mixed process; Calculate the deviate obtained between described flow measurement value and described flow setting value; Judge whether described deviate is greater than predetermined deviation value; When described deviate is greater than described predetermined deviation value, stop described hydrogen nitrogen mixed process.That is, in hydrogen nitrogen mixed process, if the deviate between the flow measurement value of hydrogen and flow setting value is greater than predetermined deviation value, then stop hydrogen nitrogen mixed process, thus accurately can control the flow of mixed gas, and then also can reduce the consumption of gas, and system response time can be improved 10%.
In order to better understand technique scheme, below by accompanying drawing and specific embodiment, technical solution of the present invention is described in detail, the specific features being to be understood that in the embodiment of the present invention and embodiment is the detailed description to technical solution of the present invention, instead of the restriction to technical solution of the present invention, when not conflicting, the technical characteristic in the embodiment of the present invention and embodiment can combine mutually.
First aspect, the embodiment of the present invention provides a kind of hydrogen control method of hydrogen nitrogen hybrid station, please refer to Fig. 1, comprising:
Step S101: the flow measurement value detecting the hydrogen obtained in hydrogen-nitrogen mixture gas;
Step S102: the flow setting value obtaining hydrogen in hydrogen nitrogen mixed process;
Step S103: calculate the deviate obtained between described flow measurement value and described flow setting value;
Step S104: judge whether described deviate is greater than predetermined deviation value;
Step S105: when described deviate is greater than described predetermined deviation value, stops described hydrogen nitrogen mixed process.
As shown in Figure 2, be the process structure figure of a nitrogen hydrogen hybrid station, it specifically comprises following structure:
Nitrogen branch road 20, the input end of described nitrogen branch road 20 passes into nitrogen;
Hydrogen branch road 21, the input end of described hydrogen branch road 21 passes into hydrogen, and the first output terminal of described hydrogen branch road 21 exports air to;
Mixed cell 22, first output terminal on the road of described nitrogen and the second output terminal of institute's hydrogen branch road 21 are connected to described mixed cell 22, for mixing described nitrogen and described hydrogen;
Diffusion valve 23, is connected to described mixed cell 22, and exports air to;
Hydrogen volume analytic unit 24, the input end of described hydrogen volume analytic unit 24 is connected to described nitrogen branch road 20 and described mixed cell 22 respectively.
In step S101, the flow measurement value of the hydrogen obtained in hydrogen-nitrogen mixture gas can be detected by the flowmeter being arranged at described hydrogen branch road 21;
In step S102, the flow setting value of hydrogen in described acquisition hydrogen nitrogen mixed process, please refer to Fig. 3, specifically comprises:
Step S301: the volume fraction setting value determining hydrogen described in described hydrogen nitrogen mixed process;
Step S302: the volume fraction corrected value determining hydrogen described in described hydrogen nitrogen mixed process;
Step S303: the flow value determining nitrogen described in described hydrogen nitrogen mixed process;
Step S304: determine described flow setting value by described volume fraction setting value, described volume fraction corrected value and described flow value.
In step S301, can arrange different volume fraction setting values according to the actual requirements, volume fraction setting value is usually located at 0 ~ 1;
In step S302, the described volume fraction corrected value determining hydrogen described in described hydrogen nitrogen mixed process, specifically comprises: determine the scale-up factor that described hydrogen is shared in described hydrogen-nitrogen mixture gas; Determine correction coefficient; Calculated by described correction coefficient and described scale-up factor and obtain described volume fraction corrected value.
Wherein, can determine by the hydrogen volume analytic unit 24 of nitrogen hydrogen hybrid station in Fig. 2 the scale-up factor that hydrogen is shared in described hydrogen-nitrogen mixture gas; Correction coefficient then can be arranged according to the actual requirements, wherein can obtain volume fraction corrected value by following formulae discovery:
Wherein,
represent described volume fraction corrected value;
C
cORrepresent described correction coefficient;
Y
outrepresent described scale-up factor.
In step S303, can detect by the flowmeter being arranged at nitrogen branch road 20 flow value obtaining nitrogen;
In step S304, flow setting value can be obtained by following formulae discovery:
Wherein,
represent described flow setting value;
represent described volume fraction setting value;
represent described volume fraction corrected value;
represent the flow value of described nitrogen.
In step S103, the scope of flow setting value is 2.5% ~ 5.5%, can by the scale-up factor of hydrogen in hydrogen volume analytic unit 24 in real time monitoring mixed gas, and be participated in calculating acquisition flow measurement value.
Wherein, in order to guarantee to obtain higher flow monitoring precision, then can by deviate set lower, if do not need to obtain higher flow monitoring precision, then deviate can arrange lower, this embodiment of the present invention is not restricted.
Wherein, flow setting value can be deducted by flow measurement value, and then obtain deviate.
In step S105, because deviate is greater than predetermined deviation value, then the too high levels of hydrogen is described, so hydrogen nitrogen mixed process can be stopped.
As further preferred embodiment, after described stopping described hydrogen nitrogen mixed process, described method also comprises: produce warning message.
For example, warning message is such as: word warning message, audible alarm information etc., and then points out hydrogen nitrogen mixed process to terminate to user.
In addition, after controlling hydrogen nitrogen mixed process based on step S105 and terminating, can also control hydrogen nitrogen hybrid station and enter backup mode, be also N2 pattern.
In addition, in specific implementation process, by the temperature transmitter that nitrogen branch road 20 is arranged, can detect and obtain temperature (TE01) before N2 reduction valve; By the pressure unit arranged before reduction valve on nitrogen branch road 20, can detect and obtain nitrogen pressure (PIT01); By the flow measuring unit that nitrogen branch road 20 is arranged, can detect and obtain nitrogen flow (FIT1); By the pressure switch that nitrogen branch road 20 is arranged, nitrogen branch road 20 upward pressure low (PSL01) can be controlled; In addition, pressure-regulating valve (PCV01) can also be set, main stop valve (SSV01), flowmeter (FIT02) etc. after pressure unit (PIT02), reduction valve after reduction valve.
For hydrogen branch road 21, then temperature transmitter before hydrogen reduction valve can be set, thus detect and obtain temperature (TE01) before reduction valve; Pressure unit before reduction valve, and then temperature (PIT01) before detection acquisition reduction valve; Flowmeter before reduction valve, can detect and obtain flow (FIT01) before reduction valve; Pressure switch, for controlled pressure high (PSH201) or pressure low (PSL01); Pressure-regulating valve (PCV01); Main stop valve (SSV01, SSV03); Pressure unit after reduction valve, for detecting the decompression downstream pressure (PSL02) obtained; Flow control valve after reduction valve, obtains flow (FCV01) after reduction valve for detecting.
In addition, by the control of the flow to hydrogen and nitrogen, thus the control to furnace pressure can also be realized.
As shown in Figure 4, be the hydrogen consumption comparison diagram in each stage with steel thermal annealing in the application and prior art, as seen from Figure 4, in terms of existing technologies, hydrogen gas consumption obviously reduces the scheme in the application.
Second aspect, based on same inventive concept, the embodiment of the present invention provides a kind of hydrogen control system of hydrogen nitrogen hybrid station, please refer to Fig. 5, comprising:
Detection module 50, for detecting the flow measurement value of the hydrogen obtained in hydrogen-nitrogen mixture gas;
Acquisition module 51, for obtaining the flow setting value of hydrogen in hydrogen nitrogen mixed process;
Computing module 52, for calculating the deviate obtained between described flow measurement value and described flow setting value;
Judge module 53, for judging whether described deviate is greater than predetermined deviation value;
Stopping modular 54, for when described deviate is greater than described predetermined deviation value, stops described hydrogen nitrogen mixed process.
Optionally, described acquisition module 51, specifically comprises:
First determining unit, for determining the volume fraction setting value of hydrogen described in described hydrogen nitrogen mixed process;
Second determining unit, for determining the volume fraction corrected value of hydrogen described in described hydrogen nitrogen mixed process;
3rd determining unit, for determining the flow value of nitrogen described in described hydrogen nitrogen mixed process;
4th determining unit, for determining described flow setting value by described volume fraction setting value, described volume fraction corrected value and described flow value.
Optionally, described 4th determining unit specifically for, determine described flow setting value by following formula:
Wherein,
represent described flow setting value;
represent described volume fraction setting value;
represent described volume fraction corrected value;
represent the flow value of described nitrogen.
Optionally, described second determining unit, specifically comprises:
First determines subelement, for determining the scale-up factor that described hydrogen is shared in described hydrogen-nitrogen mixture gas;
Second determines subelement, for determining correction coefficient;
3rd determines subelement, obtains described volume fraction corrected value for being calculated by described correction coefficient and described scale-up factor.
Optionally, the described 3rd determines subelement, specifically for obtaining described volume fraction corrected value by following formulae discovery:
Wherein,
represent described volume fraction corrected value;
C
cORrepresent described correction coefficient;
Y
outrepresent described scale-up factor.
Optionally, described system also comprises:
Alarm module, for after the described hydrogen nitrogen mixed process of stopping, producing warning message.
The one or more embodiment of the present invention, at least has following beneficial effect:
Due in embodiments of the present invention, detect the flow measurement value of the hydrogen obtained in hydrogen-nitrogen mixture gas; Obtain the flow setting value of hydrogen in hydrogen nitrogen mixed process; Calculate the deviate obtained between described flow measurement value and described flow setting value; Judge whether described deviate is greater than predetermined deviation value; When described deviate is greater than described predetermined deviation value, stop described hydrogen nitrogen mixed process.That is, in hydrogen nitrogen mixed process, if the deviate between the flow measurement value of hydrogen and flow setting value is greater than predetermined deviation value, then stop hydrogen nitrogen mixed process, thus accurately can control the flow of mixed gas, and then also can reduce the consumption of gas, and system response time can be improved 10%; And can by the control accuracy of volume fraction within ± 0.5%.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disk memory, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the process flow diagram of the method for the embodiment of the present invention, equipment (system) and computer program and/or block scheme.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block scheme and/or square frame and process flow diagram and/or block scheme and/or square frame.These computer program instructions can being provided to the embedded controller of multi-purpose computer, special purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the embedded controller of computing machine or other programmable data processing device produce device for realizing the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
These computer program instructions also can be loaded in computing machine or other programmable data processing device, make on computing machine or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computing machine or other programmable devices is provided for the step realizing the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the embodiment of the present invention and not depart from the spirit and scope of the embodiment of the present invention.Like this, if these amendments of the embodiment of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a hydrogen control method for hydrogen nitrogen hybrid station, is characterized in that, comprising:
Detect the flow measurement value of the hydrogen obtained in hydrogen-nitrogen mixture gas;
Obtain the flow setting value of hydrogen in hydrogen nitrogen mixed process;
Calculate the deviate obtained between described flow measurement value and described flow setting value;
Judge whether described deviate is greater than predetermined deviation value;
When described deviate is greater than described predetermined deviation value, stop described hydrogen nitrogen mixed process.
2. the method for claim 1, is characterized in that, the flow setting value of hydrogen in described acquisition hydrogen nitrogen mixed process, specifically comprises:
Determine the volume fraction setting value of hydrogen described in described hydrogen nitrogen mixed process;
Determine the volume fraction corrected value of hydrogen described in described hydrogen nitrogen mixed process;
Determine the flow value of nitrogen in described hydrogen nitrogen mixed process;
Described flow setting value is determined by described volume fraction setting value, described volume fraction corrected value and described flow value.
3. method as claimed in claim 2, is characterized in that, determine described flow setting value by following formula:
Wherein,
represent described flow setting value;
represent described volume fraction setting value;
represent described volume fraction corrected value;
represent the flow value of described nitrogen.
4. method as claimed in claim 2, it is characterized in that, the described volume fraction corrected value determining hydrogen described in described hydrogen nitrogen mixed process, specifically comprises:
Determine the scale-up factor that described hydrogen is shared in described hydrogen-nitrogen mixture gas;
Determine correction coefficient;
Calculated by described correction coefficient and described scale-up factor and obtain described volume fraction corrected value.
5. method as claimed in claim 4, is characterized in that, obtain described volume fraction corrected value by following formulae discovery:
Wherein,
represent described volume fraction corrected value;
C
cORrepresent described correction coefficient;
Y
outrepresent described scale-up factor.
6. the method as described in as arbitrary in claim 1-5, it is characterized in that, after described stopping described hydrogen nitrogen mixed process, described method also comprises:
Produce warning message.
7. a hydrogen control system for hydrogen nitrogen hybrid station, is characterized in that, comprising:
Detection module, for detecting the flow measurement value of the hydrogen obtained in hydrogen-nitrogen mixture gas;
Acquisition module, for obtaining the flow setting value of hydrogen in hydrogen nitrogen mixed process;
Computing module, for calculating the deviate obtained between described flow measurement value and described flow setting value;
Judge module, for judging whether described deviate is greater than predetermined deviation value;
Stopping modular, for when described deviate is greater than described predetermined deviation value, stops described hydrogen nitrogen mixed process.
8. system as claimed in claim 7, it is characterized in that, described acquisition module, specifically comprises:
First determining unit, for determining the volume fraction setting value of hydrogen described in described hydrogen nitrogen mixed process;
Second determining unit, for determining the volume fraction corrected value of hydrogen described in described hydrogen nitrogen mixed process;
3rd determining unit, for determining the flow value of nitrogen in described hydrogen nitrogen mixed process;
4th determining unit, for determining described flow setting value by described volume fraction setting value, described volume fraction corrected value and described flow value.
9. system as claimed in claim 8, is characterized in that, described 4th determining unit specifically for, determine described flow setting value by following formula:
Wherein,
represent described flow setting value;
represent described volume fraction setting value;
represent described volume fraction corrected value;
represent the flow value of described nitrogen.
10. system as claimed in claim 8, it is characterized in that, described second determining unit, specifically comprises:
First determines subelement, for determining the scale-up factor that described hydrogen is shared in described hydrogen-nitrogen mixture gas;
Second determines subelement, for determining correction coefficient;
3rd determines subelement, obtains described volume fraction corrected value for being calculated by described correction coefficient and described scale-up factor.
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| CN108690904A (en) * | 2017-04-07 | 2018-10-23 | 江油立航金属材料有限公司 | Stainless steel hot processing protection gas circulation utilization method |
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