CN104495753B - A kind of steam method for generation and device of controlling flow - Google Patents

A kind of steam method for generation and device of controlling flow Download PDF

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Publication number
CN104495753B
CN104495753B CN201410695912.5A CN201410695912A CN104495753B CN 104495753 B CN104495753 B CN 104495753B CN 201410695912 A CN201410695912 A CN 201410695912A CN 104495753 B CN104495753 B CN 104495753B
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steam
hydrogen
flow
reactor
generation
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CN104495753A (en
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陈超
姚洪
徐凯
张森
胡晓炜
肖黎
罗光前
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Huazhong University of Science and Technology
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Huazhong University of Science and Technology
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    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B5/00Water

Abstract

The invention discloses a kind of steam method for generation and device of controlling flow, the water generation reaction steam under hot conditions by hydrogen and metal oxide particle, wherein the oxidisability of the metal cation in metal oxide particle is better than hydrogen ion. Because the reaction rate of hydrogen under hot conditions and metal oxide particle is very fast, and reaction belong to irreversible reaction, hydrogen can be by complete oxidation, can produce continuously concentration and approach 100% high purity water steam; And the flow of steam is subject to the flow-control of hydrogen completely. Because the flow control accuracy of hydrogen is very high, therefore, compared with the method for generation of conventional liquid water generation steam, the present invention improves greatly to the control accuracy of steam flow; In addition, the mol ratio of the hydrogen of reaction and the steam of generation is 1:1, does not have volumetric flow of gas to change in course of reaction, can guarantee the pressure stability of steam. Therefore the present invention has advantages of that steam output pressure and stability of flow, flow control accuracy are high.

Description

A kind of steam method for generation and device of controlling flow
Technical field
The invention belongs to steam generation technique field, more specifically, relate to a kind of water of controlling flow and steamGas method for generation and device.
Background technology
Steam is unstrpped gas conventional in chemical reaction process. In laboratory, launch steamParticipate in reaction experiment (as coal tar reacts with steam gasification, ethanol and steam reforming reaction, firstAlkane and steam reforming reaction etc.), often need to realize the stable supplying of continuous micro steam, to protectPrecision and the degree of accuracy of card experimental result. Current traditional steam method for generation is and adopts water is formerMaterial, in the continuous injection heating device of peristaltic pump other constant current water pumps such as (or) syringe pumps, utilizesThe principle of water heat absorption evaporation produces minor amount of water steam.
But the problem that traditional steam method for generation mainly exists is: 1) liquid water of 0.1ml/min turnsThe steam flow becoming is about 5.556 × 10-3Mol/min is (1.013 × 105Pa, under 100 DEG C of conditions approximatelyFor 170mL/min), therefore making water is the steam method for generation of raw material, the precision of water pump is steamed waterThe impact of throughput is larger, and the control accuracy of steam flow is often not high; 2) peristaltic pump is by pressingThe continuous squeezing tube of roller forms parital vacuum and completes the continuous suction of convection cell and conveying [peristaltic pump is at chemistryApplication in course of reaction, Feng Yujing, Beijing Printing Institute's journal, 21 (6), 2013], but take outFluid flow in the of short duration process of inhaling is the discontinuous effect of Fluid Pulsation that easily causes, and causes steam defeatedThe pressure oscillation going out is large, instability of flow; 3) syringe pump is to enter by the piston of motor pushing syringeConveying [operation principle of micro-injection pump and application thereof, Chen Hao, the Chinese medicine equipment 9 of row convection cell(10), 2012], but between piston and syringe, resistance easily causes the bar at low discharge tooUnder part, form effect of Fluid Pulsation, affect pressure and the flow of steam output; 4) water enters boiling of heaterRising vaporization is violent physical conversion process, and because the density of liquid is large, the density of gas is little, occursIn process, gas volume meeting acute variation, causes the pressure oscillation amplitude of steam larger; 5) must makeDriving force with a certain amount of carrier gas as air-flow, is difficult to occur the steam of high concentration.
Summary of the invention
For above defect or the Improvement requirement of prior art, the object of the present invention is to provide a kind of controlThe steam method for generation of flow processed, wherein to the oxidation of processing step, especially steam also passes throughResearch and the design of the aspects such as former reaction mechanism and key process parameter thereof, compared with prior art canEffectively the existing steam method for generation steam flow control accuracy of solution is not high, steam generation is unstableFixed problem, can meet (for example laboratory-scale that requires to high accuracy continuous micro steamApplication etc.), and the method for generation of this steam can carry out supply to raw material easily, can reachThe technique effect that steam recurs, the steam output pressure of generation and stability of flow, precision are high,Precision can reach 4.464 × 10-6Mol/min is (1.013 × 105Pa, is about under 100 DEG C of conditions0.137mL/min), and realize simple, easy to operate.
For achieving the above object, according to one aspect of the present invention, provide a kind of water of controlling flowSteam method for generation, is characterized in that, comprises the following steps:
(1) metal oxide particle is placed in to reactor, and in described metal oxide particleThe oxidisability of metal cation is better than hydrogen ion;
(2) in described reactor, pass into hydrogen;
(3) flow to the hydrogen passing in described reactor by mass-flow gas meter adjustment, andHeat described reactor, make described hydrogen and described metal oxide particle generation redox reaction rawBecome the steam of flow rates controlled system.
As present invention further optimization, described metal oxide particle be cupric oxide, cuprous oxide,One or more in di-iron trioxide.
As present invention further optimization, in described step 1, the quality of metal oxide particle is notBe less than the metal oxide particle quality of per minute in step 3 and described hydrogen generation redox reaction500 times.
As present invention further optimization, the measurement essence of mass-flow gas meter in described step 3Degree equals or is better than 0.1mL/min under standard state.
As present invention further optimization, in described step 3, described reactor is heated to notLower than the temperature of 600 DEG C.
Another object of the present invention is to provide a kind of water vapor generation device of controlling flow, this water steamsGas generating means comprises that Hydrogen Line, mass-flow gas meter, reactor, heating furnace, steam are defeatedGo out pipeline, it is characterized in that:
Described Hydrogen Line is connected with described reactor, for inputting hydrogen in described reactor;
Described mass-flow gas meter is positioned on described Hydrogen Line, for controlling in described reactorThe flow of inputting hydrogen;
Described reactor carries metal oxide particle, the metal sun in described metal oxide particleThe oxidisability of ion is better than hydrogen ion;
Described heating furnace is positioned at outside described reactor, makes described burning for heating described reactorComposition granule and hydrogen generation redox reaction generate steam;
Described steam output channel is connected with described reactor, for exporting described steam.
As present invention further optimization, the certainty of measurement of described mass-flow gas meter is at standard shapeUnder state, be parity with or superiority over 0.1mL/min.
As present invention further optimization, described reactor is that fluidized-bed reactor or fixed bed are anti-Answer device.
As present invention further optimization, described Hydrogen Line can also preheating described in hydrogen.
As present invention further optimization, in described fluidized-bed reactor or fixed bed reactors, go backDispose air distribution plate, this air distribution plate is positioned at the exit of described Hydrogen Line; Described fluidized-bed reactorOr in fixed bed reactors, also dispose gas solid separation plate, this gas solid separation plate is positioned at described steamThe porch of output channel.
In general, the above technical scheme of conceiving by the present invention, compared with prior art, mainComprise following technological merit:
1, the flow control accuracy of steam is high: owing to just can regulating water to steam by adjusting hydrogen flowing quantityThroughput, makes the flow-control of the steam generating realize simple, easy to operate; And on the other hand,Because the precision of mass-flow gas meter is very high, taking certainty of measurement under standard state as 0.1mL/minGas flow count example, corresponding steam flow control accuracy can reach 4.464 × 10-6mol/min(1.013 × 105Pa, is about 0.137mL/min under 100 DEG C of conditions). And taking precision as 0.1ml/minThe method for generation of the conventional liquid water generation steam of water pump control is example, the steam that the method generatesFlow control accuracy is 5.556 × 10-3Mol/L is (1.013 × 105Pa, is about under 100 DEG C of conditions170mL/min). Visible, the method for the invention improves greatly to the control accuracy of steam flow.
2, the reaction conversion ratio of hydrogen is high, and steam occurs to stablize, continuous, purity is high: reactor canTo be fluid bed or fixed bed reactors, if wherein adopt fixed bed reactors, due to hydrogen and goldBelong to oxide redox reaction generation steam occurs rapidly, the steam of generation is subject to hydrogen flowing quantity controlThe impact of system (being the certainty of measurement of corresponding mass-flow gas meter), flow control accuracy is high; If adoptWith fluidized-bed reactor, (i.e. the raw material using hydrogen as fluidizing gas, metal oxide particle is as streamChange the raw material of medium), can make heat and raw hydrogen transmit rapidly, make hydrogen and metal oxide moreGenerate steam for there is rapidly redox reaction, the required temperature of hydrogen complete reaction is lower,The better effects if of reaction, the reaction conversion ratio of hydrogen is more complete; And the steam producing is still subject to hydrogenThe impact (certainty of measurement of corresponding mass-flow gas meter) of flow-control, flow control accuracy is high.
And on the other hand, before reactor heating (in described step 1), in reactor, placeThe quality of metal oxide particle is not less than per minute in step 3 and described hydrogen generation redox is anti-500 times of the metal oxide particle quality of answering, make the equal energy of hydrogen being passed in reactor per minuteFully react with metal oxide particle, avoid the hydrogen causing due to metal oxide particle insufficient raw materialThe problem of solid/liquid/gas reactions low conversion rate, has guaranteed the purity of the steam of output. In addition, reactor can quiltBe heated to the temperature (in described step 3) that is not less than 600 DEG C, can make hydrogen and metal oxideIntergranular redox reaction is rapider, and the reaction conversion ratio of hydrogen is high, and the purity of steam alsoBetter.
3, the steam flow, the pressure stability that produce, and can produce continuously: due to the hydrogen of reactionWith the mol ratio of steam generating be 1:1, in course of reaction, do not have volumetric flow of gas to change, can be trueThe pressure stability of water conservation steam, i.e. the present invention can be by controlling output water to the Flow-rate adjustment of hydrogenThe flow of steam, has advantages of that steam output pressure and stability of flow, precision are high; In addition, bySteam method for generation in the present invention can carry out supply, energy to raw material (as hydrogen) easilyEnough reach the technique effect that steam recurs, can realize the stable generation of continuous micro steam.
4, the steam purity producing is high: owing to using hydrogen to provide hydrogen source as generating the former of steamMaterial, and use metal oxide (for example, cupric oxide) particle to provide oxygen source as generating steam, in high-temperature reactor, there is redox fast by hydrogen and metal oxide particle anti-in raw materialShould, produce steam. Due to the oxidisability of metal cation in metal oxide particle be better than hydrogen from(taking copper oxide particle as example, metal cation is wherein Cu to son2+, and Cu2+Oxidisability be eager to excelIn H+), hydrogen and metal oxide particle reaction rate are very fast, and reaction belongs to irreversible reaction, hydrogenGas can be by complete oxidation, can produce continuously concentration and approach 100% high purity water steam.
Brief description of the drawings
Fig. 1 is the structural representation that the present invention is based on fluidized-bed reactor water vapor generation device;
Fig. 2 is the structural representation that the present invention is based on fixed bed reactors water vapor generation device.
Wherein, 1 is hydrogen; 2 is mass-flow gas meter; 3 is heating furnace; 4 is reactor; 5 areGas preheating pipe; 6 is air distribution plate; 7 is copper oxide particle; 8 is reative cell; 9 is sample feeding pipe;10 is gas solid separation plate; 11 is steam output channel.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawingAnd embodiment, the present invention is further elaborated. Should be appreciated that described herein concreteEmbodiment only, in order to explain the present invention, is not intended to limit the present invention.
Embodiment 1
Figure 1 shows that the structural representation that the present invention is based on fluidized-bed reactor water vapor generation device,Described fluidized-bed reactor is miniature fluidized-bed reactor, the diameter 60mm of this fluidized-bed reactor, heightDegree 180mm, fluidized-bed reactor use quartz material, guarantee fluidized-bed reactor itself not can with hydrogenGas and/or steam react. Air distribution plate 6 in fluidized-bed reactor ensures that gas is logical from lower to upperCross, and copper oxide particle 7 can not leak to preheating pipe 5 from reative cell 8; Copper oxide particle 7 bedsHeight ensure gas be greater than hydrogen complete reaction required time in the time of staying of bed; Gas solid separationPlate 10 ensures that gas passes through from lower to upper, and copper oxide particle 7 can not escape into water steaming from reative cell 8Gas output channel 11. Heating furnace the inside is provided with temperature sensor, and above-mentioned fluidized-bed reactor is positioned over thisNear temperature sensor, by monitoring reaction zone temperature information, can pass through the heating schedule essence of heating furnaceReally control the temperature in reactor.
Adopt the method for said apparatus generation 0.001mol/min flow steam as follows: first at normal temperatureThe copper oxide particle that under condition of normal pressure by 1000g, grain diameter scope is 50-100 μ m passes through sample feeding pipe9 add in the reative cell of miniature fluid bed of diameter 60mm, height 180mm, quartz material, and willSample feeding pipe sealing. With by hydrogen, the air in this reative cell being drained in backward fluidized-bed reaction chamber.When the indoor air of fluidized-bed reaction by after draining (as the volume fraction of the hydrogen in fluidized-bed reactorBe greater than 99.9%), by heating furnace, miniature fluidized-bed reaction chamber is heated to 800 DEG C, and ensures that water steamsThe temperature at gas output channel place is higher than 110 DEG C. Afterwards by the flow of mass-flow gas meter control hydrogenFor 22.4ml/min (under standard state, is 1.013 × 10 at pressure5Pa, temperature are the state of 0 DEG CUnder). Through preheating pipe, preheating (can make reactive hydrogen gas heat up sooner, reach to hydrogen preheating to hydrogenThe temperature of reacting with cupric oxide) enter equably again the reative cell of miniature fluid bed by air distribution plate, andWith the copper oxide particle in reative cell, violent redox reaction occurs, hydrogen is generated by complete oxidationThe steam of 0.001mol/min. Last gas solid separation plate steams the water of the solid particle of fluidisation state and gaseous stateGas separates, and the pure water vapor of 0.001mol/min is exported by steam output channel.
The certainty of measurement of described mass-flow gas meter equals 0.1mL/min under standard state, passes intoThe precision of the flow of the hydrogen in above-mentioned fluidized-bed reactor under standard state is also 0.1mL/min.
Embodiment 2
Figure 2 shows that the structural representation that the present invention is based on fixed bed reactors water vapor generation device,Described fixed bed reactors are micro fixed-bed reactor, the diameter 60mm of these fixed bed reactors, heightDegree 180mm, fixed bed reactors use quartz material, guarantee fixed bed reactors itself not can with hydrogenGas and/or steam react. Air distribution plate 6 in fixed bed reactors ensures that gas is logical from top to bottomCross; It is completely anti-that the height of copper oxide particle 7 beds ensures that gas is greater than hydrogen in the time of staying of bedAnswer required time; Gas solid separation plate 10 ensures that gas passes through from top to bottom, and copper oxide particle 7 can notEscape into steam output channel 11 from reative cell 8.
Adopt the method for said apparatus generation 0.001mol/min flow steam as follows: first at normal temperatureThe copper oxide particle that under condition of normal pressure by 1000g, grain diameter scope is 50-100 μ m passes through sample feeding pipe9 add in the reative cell of miniature fixed bed of diameter 60mm, height 180mm, quartz material, and willSample feeding pipe sealing. With by hydrogen, the air in this reative cell being drained in backward fixed bed reaction chamber.When the indoor air of fixed bed reaction by after draining (as the volume fraction of the hydrogen in fixed bed reactorsBe greater than 99.9%), by heating furnace, miniature fixed bed reaction chamber is heated to 800 DEG C, and ensures that water steamsThe temperature at gas output channel place is higher than 110 DEG C. Afterwards by the flow of mass-flow gas meter control hydrogenFor 22.4ml/min (under standard state, is 1.013 × 10 at pressure5Pa, temperature are the state of 0 DEG CUnder). Through preheating pipe, preheating (can make reactive hydrogen gas heat up sooner, reach to hydrogen preheating to hydrogenThe temperature of reacting with cupric oxide) enter equably again the reative cell of miniature fixed bed by air distribution plate, andWith the copper oxide particle in reative cell, violent redox reaction occurs, hydrogen is generated by complete oxidationThe steam of 0.001mol/min. Last gas solid separation plate separates the steam of solid particle and gaseous state,The pure water vapor of 0.001mol/min is exported by steam output channel.
The certainty of measurement of described mass-flow gas meter equals 0.1mL/min under standard state, passes intoThe precision of the flow of the hydrogen in above-mentioned fixed bed reactors under standard state is also 0.1mL/min.
The steam that above-described embodiment 1 and 2 can be realized 0.001mol/min flow occurs. ReactedCheng Zhong, in order to ensure that cupric oxide is always in excessive state, makes the purity of the steam of reactor outputHigher than 99%, the copper oxide particle quality in reative cell is not less than 500 times of its consumption per minute,Its concrete quality will occur to decide according to steam desired concrete continuous time. With embodiment 1For example, under this steam occurrence condition, the cupric oxide of consumption per minute is 0.08g, guarantees cupric oxideCondition in large excessive state is that the copper oxide particle quality in reative cell is not less than 40g, once addsCarrying 1000g copper oxide particle can meet and in 200 hours, realize 0.001mol/min steam approachingContinous-stable occur.
The steam that hydrogen and metal oxide generation redox reaction generate flow rates controlled system is insteadAnswer actuator temperature to keep carrying out under constant. In embodiment 1 and 2, in reactor, cupric oxide and hydrogen are sent outThe temperature of raw redox reaction is 800 DEG C, and this is mainly for the order of accelerating redox reaction speed. Under condition of normal pressure, the temperature that cupric oxide and hydrogen reaction generate steam is about 250 DEG C, therefore,As long as the temperature of reactor is not less than 250 DEG C and just can generates steam.
About the speed of cupric oxide and oxidation of hydrogen reduction reaction, the hydrogen reducing oxidation that had literature researchThe reaction power mathematic(al) parameter of copper, the time dependent computing formula of this reaction hydrogen conversion drawing asUnder:
dα dt = 6.75 × 10 5 e 594220 RT ( 1 - α ) 1.08 min - 1
According to above-mentioned formula, hydrogen conversion reaches the impact that 99% needed reaction time was subject to temperature,Under 500 DEG C of conditions, need 5.15s, under 600 DEG C of conditions, need 1.79s, under 700 DEG C of conditions, need 0.77s,Under 800 DEG C of conditions, need 0.39s. Therefore,, in order further to improve the effect that steam occurs, ensuredFull response, reaction temperature can be that 500 DEG C above or more than 600 DEG C, the higher reaction of temperature is more thoroughThe end.
On the other hand, the height of cupric oxide (corresponding with the amount of cupric oxide in reactor) in reactorHigher, when reaction has just started to occur, hydrogen is easier fully reaction also. Hydrogen by copper oxide timeBetween can be by below formula estimation: t=h/ (q/S), the height that wherein h is copper oxide, q is hydrogenFlow, S is fluid bed or fixed bed reaction district cross-sectional area. The height of the cupric oxide in embodiment 1 and 2Degree is about 60mm, and under standard state, the hydrogen of 22.4ml/min is 1.013 × 105Under Pa, 800 DEG C of conditionsTime by copper oxide particle layer is about 116s, is much higher than hydrogen conversion at 800 DEG C and reaches 99%The required time, visible, the hydrogen in embodiment 1 and 2 often can fully react with cupric oxide. ForEnsure the abundant reaction of hydrogen, will guarantee that on the one hand the content of another reaction raw materials cupric oxide (do not considerIts height), the reaction time that also will make hydrogen fully react required is on the other hand less than hydrogen and cupric oxideThe time contacting in reactor. The reaction time that hydrogen fully reacts required is less, is more conducive to anti-That answers fully carries out; And reaction temperature is the reaction conversion ratio (being that can hydrogen fully react) of hydrogenationKey factor, the temperature of reaction is higher, the reaction time that hydrogen fully reacts required is fewer, hydrogenSufficient reacting just easier.
Copper oxide particle in embodiment 1 and 2 can also substitute with other metal oxide particles, thisThe oxidisability of the metal cation in a little metal oxide particles is better than hydrogen ion, as di-iron trioxide (Temperature its Fe during higher than 510 DEG C3+Oxidisability be better than H+) etc., and due to each metal oxide withHydrogen generation redox reaction generates the required temperature difference of steam, therefore, according to circumstances adjustThe temperature of whole reactor. Often the temperature of reactor is higher, and the reaction conversion ratio of hydrogen is also higher, anti-Should be more abundant. General in the time that the temperature of reactor is not less than 800 DEG C, the reaction conversion ratio of hydrogen can reachTo user demand.
In the present invention, exporting the flow of steam can control by the flow of adjusting inputting hydrogen,According to the demand of steam flow, (every by the mass flow of mass-flow gas meter control hydrogenThe hydrogen of the steam demand 1mol/min of 1mol/min). In addition, if reactor adopts fluid bed anti-Answer device, the hydrogen that enters reative cell not only can that strong redox occurs be anti-with copper oxide particleShould generate continuous steam, but also can realize the fluidisation to copper oxide particle, strengthening gas withHeat transfer, mass transfer and the chemical reaction process of solid particles surface, more easily fully send out redox reactionRaw.
Because embodiment 1 is serious offense amount (every 1g with the relative hydrogen of copper oxide particle in 2The hydrogen of the oxidable 280ml of cupric oxide), miniature fluid bed or fixed bed reactors can be realized cupric oxideTo the complete oxidation of hydrogen, within the certain limit time, realize the stable generation of continuous micro steam.The minor amount of water steam generating continuously and solid particle are realized gas-solid and are divided under the effect of gas solid separation plate 10From, steam is stable exports steam output channel to, realizes the stable generation of continuous micro steam.
By adopting the steam method for generation in the present invention, hydrogen and copper oxide particle reaction rate are veryHurry up, and reaction belong to irreversible reaction, hydrogen can, by complete oxidation, can produce concentration and approach 100% continuouslyHigh purity water steam. Before and after in the process of hydrogen and cupric oxide water generation reaction steam, state does not have pressureChange, and the whole stage of reaction do not relate to phase transition process, can ensure pressure and the stability of flow of steam.
In addition, steam flow of the present invention can be controlled more accurately. Marking with certainty of measurementGas flow for 0.1mL/min under accurate state is counted example, and corresponding steam flow control accuracy canReach 4.464 × 10-6Mol/min is (1.013 × 105Pa, is about 0.137mL/min under 100 DEG C of conditions).And the method for generation of conventional liquid water generation steam taking precision as the control of 0.1ml/min water pump is as example,The steam flow control accuracy that the method generates is 5.556 × 10-3Mol/L is (1.013 × 105Pa,Under 100 DEG C of conditions, be about 170mL/min). Visible, steam method for generation and device in the present inventionCan greatly improve the precision of controlling steam flow.
The temperature of steam output channel otherwise lower than the saturation temperature of steam, the saturated temperature of steamDegree is gas-liquid critical-temperature, and under atmospheric pressure environment (being under normal pressure), the saturation temperature of steam is100 DEG C. In embodiment 1, the temperature of steam output channel is 110 DEG C, and this temperature can also arrangeFor being not less than 100 DEG C.
Those skilled in the art will readily understand, the foregoing is only preferred embodiment of the present invention,Not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, etc.With replacement and improvement etc., within all should being included in protection scope of the present invention.

Claims (10)

1. a steam method for generation of controlling flow, is characterized in that, comprises the following steps:
(1) metal oxide particle is placed in to reactor, and in described metal oxide particleThe oxidisability of metal cation is better than hydrogen ion;
(2) in described reactor, pass into hydrogen;
(3) in described reactor, pass into the flow of hydrogen by mass-flow gas meter adjustment, and addThe described reactor of heat, generates described hydrogen and described metal oxide particle generation redox reactionThe steam of flow rates controlled system.
2. the steam method for generation of control flow as claimed in claim 1, is characterized in that, instituteState metal oxide particle and be one or more in cupric oxide, cuprous oxide, di-iron trioxide.
3. the steam method for generation of control flow as claimed in claim 1, is characterized in that,In described step 1, the quality of metal oxide particle is not less than per minute in step 3 and described hydrogen and sends out500 times of the metal oxide particle quality of raw redox reaction.
4. the steam method for generation of control flow as claimed in claim 1, is characterized in that,In described step 3, the certainty of measurement of mass-flow gas meter equals or is better than under standard state0.1mL/min。
5. the steam method for generation of control flow as claimed in claim 1, is characterized in that,In described step 3, described reactor is heated to the temperature that is not less than 600 DEG C.
6. control a generating means for the steam of flow, comprise Hydrogen Line, gas mass flowMeter, reactor, heating furnace, steam output channel, is characterized in that:
Described Hydrogen Line is connected with described reactor, for inputting hydrogen in described reactor;
Described mass-flow gas meter is positioned on described Hydrogen Line, for controlling in described reactorThe flow of inputting hydrogen;
Described reactor carries metal oxide particle, the metal sun in described metal oxide particleThe oxidisability of ion is better than hydrogen ion;
Described heating furnace is positioned at outside described reactor, makes described burning for heating described reactorComposition granule and hydrogen generation redox reaction generate steam;
Described steam output channel is connected with described reactor, for exporting described steam.
7. the generating means of the steam of control flow as claimed in claim 6, is characterized in that,The certainty of measurement of described mass-flow gas meter is parity with or superiority over 0.1mL/min under standard state.
8. the generating means of the steam of control flow as claimed in claim 6, is characterized in that,Described reactor is fluidized-bed reactor or fixed bed reactors.
9. the generating means of the steam of the control flow as described in claim 6-8 any one,It is characterized in that, described Hydrogen Line can also preheating described in hydrogen.
10. the generating means of the steam of control flow as claimed in claim 8, is characterized in that,In described fluidized-bed reactor or fixed bed reactors, also dispose air distribution plate, this air distribution plate is positioned at instituteState the exit of Hydrogen Line; In described fluidized-bed reactor or fixed bed reactors, also dispose gasGu separating plate, this gas solid separation plate is positioned at the porch of described steam output channel.
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