CN103576722B - Based on self-heating type alcohol reforming hydrogen production reactor attemperating unit and the method for LabView - Google Patents
Based on self-heating type alcohol reforming hydrogen production reactor attemperating unit and the method for LabView Download PDFInfo
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- CN103576722B CN103576722B CN201310509856.7A CN201310509856A CN103576722B CN 103576722 B CN103576722 B CN 103576722B CN 201310509856 A CN201310509856 A CN 201310509856A CN 103576722 B CN103576722 B CN 103576722B
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Abstract
The invention discloses a kind of self-heating type alcohol reforming hydrogen production reactor attemperating unit based on LabView and method.Be inserted with J type thermopair in the self-heating type alcohol reforming hydrogen production reactor of this device, J type thermopair is connected with microcomputer through temperature indicator, data collecting card; Data collecting card also has two-way respectively, one tunnel is connected with the heating handful in self-heating type alcohol reforming hydrogen production reactor through solid-state relay, and another road is connected with the reformation hydrogen production entrance in self-heating type alcohol reforming hydrogen production reactor through burning syringe pump, flow control valve.Temp. control method: the temperature comprising self-heating type alcohol reforming hydrogen production reactor warm controls, the temperature of reforming catalyst reduction process controls and the temperature of reformation hydrogen production process controls.The invention solves the climate control issues under different working condition; Compared with the temperature controller of industrial use, control program of the present invention is changeable, and control inerface is friendly, temperature control can be made more accurate by improving control program.
Description
Technical field
The present invention relates to a kind of self-heating type alcohol reforming hydrogen production reactor attemperating unit and method, especially relate to a kind of self-heating type alcohol reforming hydrogen production reactor attemperating unit based on LabView and method.
Technical background
Self-heating type alcohol reforming hydrogen production reactor is a kind of on-the-spot online hydrogen producer, and compact conformation, energy efficiency is higher, is specially adapted to automobile or mobile hydrogen fuel cell use.Generally be made up of fuel vaporization chamber, some reformation chambeies, several burning chambers and auxiliary electric heater unit.Carrying out alcohols combustion reaction in the fuel cavity that catalyst for catalytic combustion is housed, being supplied to the reformation chamber that reforming catalyst is housed after producing heat, for carrying out alcohol reforming hydrogen production reaction.By integrated themopositive reaction and thermonegative reaction, the self-heating achieving reactor is run.Because combustion catalyst burning efficiency under condition of different temperatures is different, under cryogenic conditions, efficiency is lower, affects the start-up time of reactor, therefore, is often necessary to increase auxiliary electric heater unit in autothermic reactor.
In recent years, self-heating type alcohol reforming hydrogen production reactor obtains and develops faster, Chinese invention patent (application number 200820079472.0), Chinese invention patent (application number 200910100100.0), Chinese invention patent (application number 200510033759.0) disclose the self-heating type alcohol reforming reactor of three kinds of different structure forms, and are described in detail the machinery of each autoreactor and geometry.But as a catalytic reactor, self-heating type alcohol reforming hydrogen production reactor hydrogen production process is complicated, be subject to thermokinetic parameters (temperature, flow, pressure etc.) impact larger.Wherein, the hydrogen manufacturing performance impact of temperature on reactor is particularly outstanding.According to Arrhenius equation, temperature and reaction rate exponentially relation.Changing among a small circle of temperature all will make the reaction rate of autothermic reactor reformation hydrogen production have greatly changed, thus directly affects the hydrogen manufacturing performance of autothermic reactor.Therefore, monitoring temperature need be carried out to self-heating type reforming hydrogen-preparation reactor.In autothermic reactor operational process, temperature controls mainly to comprise the steps: that the temperature of warm controls, and the temperature of reforming catalyst reduction process controls and the temperature of reformation hydrogen production process controls.Temperature conventional at present controls mainly for large-size chemical reactor, control method is mainly and adopts temperature controller to be controlled temperature of reactor by PID program, the method is simple to operate, but control performance is bad under complex working conditions, and transient effect is poor.And temperature controller control program is fixed, accurately cannot control the reactor of different working condition, affect the temperature control effect of autothermic reactor.Different reactor temperature control systems is not quite similar, and the temperature control system report for autothermic reactor is little.Chinese invention patent (application number 200780008555.9) discloses a kind of hydrogen preparation facilities and hydrogen preparation method.The temperature being referred to autothermal reforming reaction in this patent controls, but control system is simple, cannot realize accurate control.
Summary of the invention
In order to accurately control the temperature of autothermic reactor, improving autothermic reactor efficiency, the object of the present invention is to provide a kind of self-heating type alcohol reforming hydrogen production reactor attemperating unit based on LabView and method.This attemperating unit and method can carry out effective temperature control to self-heating type alcohol reforming hydrogen production reactor, by introducing LabView virtual instrument technique, display interface is friendly, control program is various, adjustable, and the temperature be particularly suitable under self-heating type alcohol reforming hydrogen production reactor complex reaction condition controls.
The technical solution used in the present invention is:
One, a kind of self-heating type alcohol reforming hydrogen production reactor attemperating unit based on LabView:
Comprise J type thermopair, temperature indicator, data collecting card, microcomputer, flow control valve, heating rod, solid-state relay, self-heating type alcohol reforming hydrogen production reactor and burning syringe pump; Be inserted with J type thermopair in self-heating type alcohol reforming hydrogen production reactor, J type thermopair is connected with microcomputer through temperature indicator, data collecting card; Data collecting card also has two-way respectively, one tunnel is connected with the heating handful in self-heating type alcohol reforming hydrogen production reactor through solid-state relay, and another road is connected with the reformation hydrogen production entrance in self-heating type alcohol reforming hydrogen production reactor through burning syringe pump, flow control valve.
Described temperature indicator has temperature conditioning and display module, 0-5V signal output module and high-temperature alarming device.
Two, based on a self-heating type alcohol reforming hydrogen production reactor Temp. control method of LabView, the step of the method is as follows:
The temperature comprising self-heating type alcohol reforming hydrogen production reactor warm controls, the temperature of reforming catalyst reduction process controls and the temperature of reformation hydrogen production process controls, and the workflow of the method is as follows:
1) first, microcomputer controls heating rod heating self-heating type alcohol reforming hydrogen production reactor by data collecting card and solid-state relay; Self-heating type alcohol reforming hydrogen production reactor measuring tempeature Tr is obtained by J type thermopair, when self-heating type alcohol reforming hydrogen production reactor measuring tempeature Tr equals the preheat temperature T1 of self-heating type alcohol reforming hydrogen production reactor (8) fuel catalytic combustion setting, heating rod stops heat supply;
2) when measuring tempeature Tr equals the preheat temperature T1 set, burning syringe pump is opened, reducing gas admission valve is opened, enter self-heating type alcohol reforming hydrogen production reactor (8) the temperature programme stage, regulate burning syringe pump flow, make the measuring tempeature Tr of self-heating type alcohol reforming hydrogen production reactor (8) increase by the temperature programme curve required by alcohol reforming hydrogen production reduction process; When measuring tempeature Tr equals the temperature Ts of temperature programme curve setting, maintain burning syringe pump feeding flow, when measuring tempeature Tr arrives the temperature of reaction T2 of self-heating type alcohol reforming hydrogen production reactor setting, Temperature Programmed Processes terminates; Reduce burning syringe pump feeding flow, maintain self-heating type alcohol reforming hydrogen production reactor on the temperature of reaction T2 of setting, when recovery time t reaches the recovery time th of setting, reduction process terminates;
3) after reduction process terminates, self-heating type alcohol reforming hydrogen production reactor starts to confess thermal reforming hydrogen production process, microcomputer is by data acquisition card start-up reformation syringe pump, regulate burning syringe pump feeding flow, make self-heating type alcohol reforming hydrogen production reactor maintain on the temperature of reaction T2 of setting, maintain burning syringe pump feeding flow and reformation syringe pump feeding flow.
Compared with background technology, the beneficial effect that the present invention has is:
1. the present invention adopts the temperature of LabView software simulating self-heating type alcohol reforming hydrogen production reactor to control, and solves the climate control issues of autothermic reactor under different working condition.
2. compared with the temperature controller of industrial use, control program of the present invention is changeable, and control inerface is friendly, temperature control can be made more accurate by improving control program.
Accompanying drawing explanation
Fig. 1 is temperature control equipment schematic diagram of the present invention.
Fig. 2 is self-heating type alcohol reforming hydrogen production reactor warm temperature control flow figure of the present invention.
Fig. 3 is self-heating type alcohol reforming hydrogen production reactor reforming catalyst reduction process temperature control flow chart of the present invention.
Fig. 4 is self-heating type alcohol reforming hydrogen production reactor reformation hydrogen production process temperature control flow chart of the present invention.
In figure: 1, J type thermopair, 2, temperature indicator, 3, data collecting card, 4, microcomputer, 5, flow control valve, 6, heating rod, 7, solid-state relay, 8, self-heating type alcohol reforming hydrogen production reactor, 9, burning syringe pump.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, the present invention includes J type thermopair 1, temperature indicator 2, data collecting card 3, microcomputer 4, flow control valve 5, heating rod 6, solid-state relay 7, self-heating type alcohol reforming hydrogen production reactor 8 and burning syringe pump 9; Be inserted with J type thermopair 1, J type thermopair 1 in self-heating type alcohol reforming hydrogen production reactor 8 to be connected with microcomputer 4 through temperature indicator 2, data collecting card 3; Data collecting card 3 also has two-way respectively, and a road is held in both hands 6 through solid-state relay 7 and the heating in self-heating type alcohol reforming hydrogen production reactor 8 and is connected, and another road is connected with the entrance in self-heating type alcohol reforming hydrogen production reactor 8 through burning syringe pump 5, flow control valve 5.
Communication is carried out by USB, microcomputer 4 is according to the temperature signal received, pass through computing, real-time output control signal, regulate solid-state relay 7 open and-shut mode by data collecting card 3 on the one hand, control the break-make of heating rod 6, heating self-heating type alcohol reforming hydrogen production reactor 8, on the other hand by data collecting card 3 control combustion syringe pump 9, regulate self-heating type alcohol reforming hydrogen production reactor 8 burning gallery Inlet Fuel flow.
The method that microcomputer 4 controls heating rod 6 heating is the method for width modulation, run by LabView program, output pulse width modulation signal, be interrupted exporting 0V or 5V signal by data collecting card, control heating rod 6 to heat, the temperature realizing self-heating type alcohol reforming hydrogen production reactor 8 controls.
Temperature indicator 2: there is temperature conditioning and display module, 0-5V signal output module and high-temperature alarming device.Model is AI704 etc.
Burning syringe pump 9: exportable 1-5V electric signal, to data collecting card 3, has range ability wide, as LSP01 etc.
Data collecting card 3: at least have 1 signal input port, 2 signal output ports, can carry out communication with microcomputer 4.As NI data collecting card etc.
Solid-state relay 7: model is as SSR-380D06E, JGX-1 etc.
Self-heating type alcohol reforming hydrogen production reactor 8: to burn two passages for having alcohol reforming and alcohols, and need the self heated reactor of electric auxiliary heating, as invention disclosed patent electric startup and stacked plate type automatic thermal reforming device in 2005 (application number: 20051003379.0).
Self-heating type alcohol reforming hydrogen production reactor 8 has reformation hydrogen production passage, catalytic combustion passage and auxiliary heating plate, containing heating rod in auxiliary heating plate.The hydrogen manufacturing principle of self-heating type alcohol reforming hydrogen production reactor 8 is generally: be furnished with combustion catalyst in catalytic combustion passage, methyl alcohol and air mixture enter catalytic combustion passage from the combustion inlet of self-heating type alcohol reforming hydrogen production reactor 8, in the auxiliary lower burning of combustion catalyst, release heat, for reactor catalyst reduction and reformation hydrogen production provide heat; Its combustion reaction is:
Methyl alcohol burning (MC): CH
3oH+1.5O
2=CO
2+ 2H
2o.
Show according to research, if self-heating type alcohol reforming hydrogen production reactor carries out preheating, will carrying out fast of fuel reaction be conducive to, the start-up time of reactor can be reduced, therefore, self-heating type alcohol reforming hydrogen production reactor increases auxiliary heating plate, for pre-thermal reactor.
Catalyst for preparing hydrogen is furnished with in reformation hydrogen production passage, need to reduce before hydrogen manufacturing, method of reducing is: the mixed gas being passed into nitrogen and hydrogen from the reformation hydrogen production entrance of self-heating type alcohol reforming hydrogen production reactor 8 in the reformation hydrogen production passage of self-heating type alcohol reforming hydrogen production reactor 8, temperature programme self-heating type alcohol reforming hydrogen production reactor 8 is also incubated a period of time, completes reduction.Carry out after reduction, preparing hydrogen by reforming methanol, methyl alcohol and aqueous mixtures are by the reformation hydrogen production passage pumping into self-heating type alcohol reforming hydrogen production reactor 8 with syringe pump of reforming, and at the auxiliary lower reformation hydrogen production of catalyst for preparing hydrogen after heat absorption, its reforming reaction comprises:
Methanol recapitalization (SR): CH
3oH+H
2o → 3H
2+ CO
2,
Steam inverse transformation (rWGS): CO
2+ H
2→ CO+H
2o,
Methanol Decomposition (DE): CH
3oH → 2H
2+ CO.
The hydrogen production process of self-heating type alcohol reforming hydrogen production reactor needs to carry out temperature accurately and controls, according to its engineering process, temperature controlled processes mainly comprises the temperature control of self-heating type alcohol reforming hydrogen production reactor warm, the temperature of reforming catalyst reduction process controls and the temperature of reformation hydrogen production process controls, and specific works flow process is as follows:
1) as shown in Figure 2, owing to improving self-heating type alcohol reforming hydrogen production reactor 8 temperature by preheating, effectively can improve Aalcohols fuel catalytic combustion efficiency, reduce the start-up time of self-heating type alcohol reforming hydrogen production reactor 8, therefore, the temperature need carrying out self-heating type alcohol reforming hydrogen production reactor 8 warm controls: microcomputer 4 controls heating rod heating self-heating type alcohol reforming hydrogen production reactor 8 by data collecting card 3 and solid-state relay 7; While heating, J type thermopair 1 is adopted to measure and obtain self-heating type alcohol reforming hydrogen production reactor 8 measuring tempeature Tr.Along with the carrying out of heating, self-heating type alcohol reforming hydrogen production reactor 8 temperature constantly rises, when self-heating type alcohol reforming hydrogen production reactor 8 measuring tempeature Tr equals the preheat temperature T1 set by self-heating type alcohol reforming hydrogen production reactor 8 fuel catalytic combustion, heating rod stops heat supply;
2) because reforming hydrogen-production catalyst needed to reduce before hydrogen manufacturing, in order to complete reduction process, self-heating type alcohol reforming hydrogen production reactor 8 needs from preheat temperature temperature programme to reduction temperature, and held for some time, therefore need to control in this process.The temperature that the temperature of reforming catalyst reduction process controls the Temperature Programmed Processes and insulating process comprising self-heating type alcohol reforming hydrogen production reactor 8 controls.Fig. 3 is the temperature control flow figure of reforming catalyst reduction process.When measuring tempeature Tr equals preheat temperature T1, burning syringe pump 9 is opened, and reducing gas admission valve is opened, and starts the Temperature Programmed Processes of self-heating type alcohol reforming hydrogen production reactor 8.The reducing gas of reformation hydrogen production is generally the mixed gas of hydrogen and nitrogen, flows into self-heating type alcohol reforming hydrogen production reactor by flow controller by reformation hydrogen production entrance, reduction catalyst for preparing hydrogen.When measuring tempeature Tr arrives the temperature of reaction T2 of self-heating type alcohol reforming hydrogen production reactor 8 setting, Temperature Programmed Processes terminates.Reduce burning syringe pump 5 feeding flow, maintain self-heating type alcohol reforming hydrogen production reactor 8 on the temperature of reaction T2 of setting, keep this temperature a period of time to the recovery time th of setting, close reducing gas admission valve, reduction process terminates.The temperature control scheme of the temperature programme of self-heating type alcohol reforming hydrogen production reactor 8 is as follows: setting program heating curve in Labview program, incipient combustion syringe pump 9 flow is set, self heated reactor measuring tempeature Tr is measured by J type thermopair 1, temperature corresponding to temperature programme curve for self-heating type alcohol hydrogen-manufacturing reactor measuring tempeature Tr is made comparisons, syringe pump flow is regulated according to the program of Labview programming after obtaining residual quantity, control survey temperature Tr follow procedure heating curve rises, when measuring tempeature Tr reaches temperature of reaction T2, Temperature Programmed Processes terminates.
3) as shown in Figure 4, after reduction process terminates, self-heating type alcohol reforming hydrogen production reactor 8 starts to confess thermal reforming hydrogen production process.In burning with under syringe pump 9 unlocking condition, microcomputer 4 starts reformation syringe pump by data collecting card 3.Fuel reforming is generally the mixing material of first alcohol and water, pumps into self-heating type alcohol reforming hydrogen production reactor 8 by reformation syringe pump, carries out alcohol reforming hydrogen production reaction.Regulate burning syringe pump 9 feeding flow, make temperature of reaction maintain on the temperature of reaction T2 of setting, maintain burning syringe pump 9 feeding flow and reformation syringe pump feeding flow, realize hydrogen-manufacturing reactor self-heating and run, until end-of-job.
This temperature control starts rear whole process without the need to manual operation, control from the temperature of self-heating type alcohol reforming hydrogen production reactor warm, control all automatically to have been controlled by Labview to the temperature control of reforming catalyst reduction process and the temperature of reformation hydrogen production process, realize the automatic control of self-heating type alcohol reforming hydrogen production reactor hydrogen production process temperature.
Claims (1)
1. the self-heating type alcohol reforming hydrogen production reactor Temp. control method based on LabView, the device of the method, comprises J type thermopair (1), temperature indicator (2), data collecting card (3), microcomputer (4), flow control valve (5), heating rod (6), solid-state relay (7), self-heating type alcohol reforming hydrogen production reactor (8) and burning syringe pump (9); Be inserted with J type thermopair (1) in self-heating type alcohol reforming hydrogen production reactor (8), J type thermopair (1) is connected with microcomputer (4) through temperature indicator (2), data collecting card (3); Data collecting card (3) also has two-way respectively, one tunnel is held in both hands (6) through solid-state relay (7) and the heating in self-heating type alcohol reforming hydrogen production reactor (8) and is connected, and another road is connected with the reformation hydrogen production entrance in self-heating type alcohol reforming hydrogen production reactor (8) through burning syringe pump (9), flow control valve (5);
Described temperature indicator (2) has temperature conditioning and display module, 0-5V signal output module and high-temperature alarming device;
It is characterized in that: the Temp. control method of this device comprises the temperature control of self-heating type alcohol reforming hydrogen production reactor warm, the temperature of reforming catalyst reduction process controls and the temperature of reformation hydrogen production process controls, and the workflow of the method is as follows:
1) first, microcomputer (4) controls heating rod heating self-heating type alcohol reforming hydrogen production reactor (8) by data collecting card (3) and solid-state relay (7); Self-heating type alcohol reforming hydrogen production reactor (8) measuring tempeature Tr is obtained by J type thermopair (1), when self-heating type alcohol reforming hydrogen production reactor (8) measuring tempeature Tr equals the preheat temperature T1 of self-heating type alcohol reforming hydrogen production reactor (8) fuel catalytic combustion setting, heating rod stops heat supply;
2) when measuring tempeature Tr equals the preheat temperature T1 set, burning syringe pump (9) is opened, reducing gas admission valve is opened, enter self-heating type alcohol reforming hydrogen production reactor (8) the temperature programme stage, regulate burning syringe pump (9) flow, make the measuring tempeature Tr of self-heating type alcohol reforming hydrogen production reactor (8) increase by the temperature programme curve required by alcohol reforming hydrogen production reduction process; As the temperature of reaction T2 that measuring tempeature Tr arrival self-heating type alcohol reforming hydrogen production reactor (8) sets, Temperature Programmed Processes terminates; Reduce burning syringe pump (9) feeding flow, maintain self-heating type alcohol reforming hydrogen production reactor (8) on the temperature of reaction T2 of setting, when recovery time t reaches the recovery time th of setting, reduction process terminates;
3) after reduction process terminates, self-heating type alcohol reforming hydrogen production reactor (8) starts to confess thermal reforming hydrogen production process, microcomputer (4) starts reformation syringe pump by data collecting card (3), regulate burning syringe pump (9) feeding flow, make self-heating type alcohol reforming hydrogen production reactor (8) maintain on the temperature of reaction T2 of setting, maintain burning syringe pump (9) feeding flow and reform with syringe pump feeding flow.
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| CN104076841B (en) * | 2014-07-25 | 2016-01-20 | 山东量子科学技术研究院有限公司 | A kind of high-accuracy attemperating unit |
| CN114265446B (en) * | 2021-12-27 | 2023-07-14 | 广东蓝玖新能源科技有限公司 | Heat supply structure for hydrogen production reactor, temperature coordination control method and system |
| CN114779863B (en) * | 2022-06-14 | 2022-09-13 | 山东智奇环境技术有限公司 | Automatic hydrogen production intelligent control system |
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| CN1695785A (en) * | 2005-03-25 | 2005-11-16 | 华南理工大学 | Electric startup and stacked plate type automatic thermal reforming device |
| CN203552097U (en) * | 2013-10-25 | 2014-04-16 | 浙江大学 | LabView-based temperature control device of self-heating alcohol reforming hydrogen-production reactor |
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