CN114620677A - Hydrogen production system - Google Patents
Hydrogen production system Download PDFInfo
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- CN114620677A CN114620677A CN202111484199.6A CN202111484199A CN114620677A CN 114620677 A CN114620677 A CN 114620677A CN 202111484199 A CN202111484199 A CN 202111484199A CN 114620677 A CN114620677 A CN 114620677A
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- heat exchange
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- exchange device
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- waste gas
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 98
- 239000001257 hydrogen Substances 0.000 title claims abstract description 98
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 98
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 42
- 239000002912 waste gas Substances 0.000 claims abstract description 71
- 239000007788 liquid Substances 0.000 claims description 78
- 239000007789 gas Substances 0.000 claims description 49
- 238000010438 heat treatment Methods 0.000 claims description 19
- 238000009434 installation Methods 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 2
- 230000008676 import Effects 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Abstract
The invention provides a hydrogen production system, and relates to the technical field of chemical equipment; the hydrogen production system comprises: a hydrogen reactor; a steam generator; the auxiliary heat exchange device is communicated with an external medium to be heated and is provided with a plurality of waste gas inlets; the heat exchange device is communicated with the auxiliary heat exchange device; wherein the plurality of waste gas inlets are respectively communicated with the hydrogen reactor and the steam generator. Through setting up a plurality of waste gas imports and communicate respectively hydrogen reactor with steam generator has reduced whole installation space, has reduced manufacturing cost.
Description
Technical Field
The invention relates to the technical field of chemical equipment, in particular to a hydrogen production system.
Background
With the limited nature of conventional energy and the increasing projection of environmental problems, new energy with the characteristics of environmental protection and regeneration is more and more paid attention from various countries. In the research of various new energy sources, hydrogen is the first choice of researchers in a completely clean combustion mode and with the advantage of being renewable.
In the existing hydrogen production system, a plurality of auxiliary heat exchange devices are arranged and are connected with a hydrogen reactor and a steam generator in a one-to-one manner, so that the problems of overhigh production cost and overlarge installation volume are caused.
Disclosure of Invention
The problems solved by the invention are as follows: the problems of overhigh production cost and overlarge installation volume caused by one-to-one connection of a plurality of auxiliary heat exchange devices with a hydrogen reactor and a steam generator are solved.
To solve the above problem, an embodiment of the present invention provides a hydrogen production system, including: a hydrogen reactor; a steam generator; the auxiliary heat exchange device is communicated with an external medium to be heated and is provided with a plurality of waste gas inlets; the heat exchange device is communicated with the auxiliary heat exchange device; wherein the plurality of waste gas inlets are respectively communicated with the hydrogen reactor and the steam generator.
Compared with the prior art, the embodiment of the invention has the following beneficial effects: the hydrogen reactor and the steam generator are respectively communicated through a plurality of waste gas inlets provided with the auxiliary heat exchange device and used for collecting waste gas generated by the steam generator and the hydrogen reactor, the inflow efficiency of a medium to be heated in the auxiliary heat exchange device is improved, namely the inflow efficiency of the waste gas, so that the waste gas generated by the steam generator and the hydrogen reactor is transferred to the medium to be heated flowing through the auxiliary heat exchange device, the surface temperature of the medium to be heated flowing into the steam generator is accelerated to be improved by combining the heat exchange device, the generation of steam in the steam generator is accelerated, and the overall hydrogen production efficiency is improved; meanwhile, a plurality of waste gas inlets are arranged to be respectively communicated with the hydrogen reactor and the steam generator, so that the whole installation space is reduced, and the production cost is reduced.
In an alternative embodiment, the method further comprises: and the liquid pipeline is arranged between the liquid outlet end of the auxiliary heat exchange device and the liquid inlet end of the heat exchange device.
It can be understood that the liquid pipeline is arranged and connected between the liquid outlet end of the auxiliary heat exchange device and the liquid inlet end of the heat exchange device, so that a to-be-heated medium heated by the auxiliary heat exchange device is input into the heat exchange device to be further heated, the surface temperature of the to-be-heated medium is further increased, and the generation of steam in the steam generator is accelerated.
In an alternative embodiment, the auxiliary heat exchange device further comprises: and the waste gas outlet is arranged opposite to the waste gas inlet in the auxiliary heat exchange device and communicated with the waste gas inlet.
As can be understood, the waste gas outlet communicated with the waste gas inlet is arranged on the auxiliary heat exchange device, so that the waste gas after heat exchange is conveniently discharged from the waste gas outlet.
In an alternative embodiment, the auxiliary heat exchange device comprises: one end of the first medium channel is communicated with the medium to be heated, and the other end of the first medium channel is communicated with the heat exchange device through the liquid pipeline; one end of the second medium channel is communicated with the hydrogen reactor and the steam generator through the plurality of waste gas inlets and is used for circulating a heating medium, and the other end of the second medium channel is communicated with the waste gas outlet; wherein the heating medium in the second medium passage is used to transfer heat to the medium to be heated in the first medium passage.
It can be understood that two medium channels are provided for circulating the medium to be heated and the heating medium respectively, so as to realize heat exchange between the medium to be heated and the heating medium.
In an alternative embodiment, the hydrogen reactor is provided with a first offgas discharge opening, the steam generator is provided with a second offgas discharge opening, and the auxiliary heat exchange device includes: the heat exchange cavity is arranged inside the auxiliary heat exchange device; at least one heat exchange pipe arranged in the heat exchange cavity and communicated with the first exhaust gas discharge port and the second exhaust gas discharge port; and the liquid circulation pipeline is communicated with the heat exchange cavity.
It is understood that at least one heat exchange pipe is arranged in the heat exchange cavity and is used for circulating the exhaust gas input by the first exhaust gas discharge port and the second exhaust gas discharge port; the liquid circulation pipeline is arranged to be communicated with the heat exchange cavity, so that an external medium to be heated can conveniently flow into the heat exchange cavity through the liquid circulation pipeline, the temperature of the medium to be heated is raised through heat transfer of the heat exchange pipeline, the heated medium to be heated flows into the steam generator from the heat exchange cavity through the liquid circulation pipeline, the steam generation efficiency is improved, and the overall hydrogen production efficiency is improved.
In an alternative embodiment, the auxiliary heat exchange device is provided with a plurality of auxiliary heat exchange devices; the liquid circulation pipelines of each auxiliary heat exchange device are communicated with each other, and each liquid circulation pipeline is provided with an electromagnetic valve.
As can be understood, the heating efficiency of the medium to be heated is improved by arranging a plurality of auxiliary heat exchange devices; meanwhile, the liquid circulation pipelines of each auxiliary heat exchange device are communicated with each other, and each liquid circulation pipeline is provided with an electromagnetic valve; each liquid circulation pipeline can be independently controlled through the electromagnetic valve, and the control flexibility of the hydrogen production system is improved so as to adapt to different requirements.
In an optional embodiment, the heat exchange pipe is provided with a plurality of heat exchange pipes, and each heat exchange pipe extends along the axial direction of the heat exchange cavity and is arranged in the heat exchange cavity at intervals.
As can be understood, a plurality of heat exchange pipelines are arranged in the heat exchange cavity, so that under the combined action of the plurality of heat exchange pipelines, the inflow amount of waste gas and the heat exchange area in the heat exchange cavity are increased, and the heat exchange efficiency is improved; meanwhile, each heat exchange pipeline extends along the axis direction of the heat exchange cavity and is arranged in the heat exchange cavity at intervals, so that the medium to be heated in the heat exchange cavity is heated more uniformly, the sufficient heat exchange between the medium to be heated flowing out of the heat exchange pipeline and waste gas in the heat exchange pipeline is promoted, and the heat exchange efficiency is further improved.
In an alternative embodiment, the heat exchange tubes are straight tubes or coiled tubes.
As can be understood, the heat exchange pipeline is arranged to be a straight pipe, so that the heat exchange pipeline can be conveniently installed in the heat exchange cavity; the heat exchange pipeline is arranged to be a coil pipe, so that the heat conduction surface between the heat exchange pipeline and an external medium to be heated can be increased, and the heat conduction effect is improved; simultaneously, set up the heat transfer pipeline and be the coil pipe, self intensity is higher, and has prolonged the flow of intraductal waste gas long for waste gas in the heat transfer pipeline can and the outside abundant heat transfer of medium of treating of pipe, makes the heat promotion of medium of treating to heat faster, promotes hydrogen manufacturing efficiency of hydrogen manufacturing system then.
In an alternative embodiment, the auxiliary heat exchange device further comprises: the air inlet cavity is positioned at one end of the heat exchange cavity, which is close to the waste gas inlet, and is communicated with the heat exchange pipeline; the gas outlet cavity is positioned at one end of the heat exchange cavity close to the waste gas outlet, one end of the gas outlet cavity is communicated with the heat exchange pipeline, and the other end of the gas outlet cavity is communicated with the waste gas outlet; and the induced draft fan is communicated with the air outlet cavity through the waste gas outlet.
The exhaust gas inlet cavity is communicated with the heat exchange pipelines, so that a buffer area is formed at the position of the exhaust gas inlet cavity, when the exhaust gas enters the exhaust gas inlet cavity, the exhaust gas can be uniformly introduced into each heat exchange pipeline, each heat exchange pipeline in the heat exchange cavity can uniformly heat, the medium to be heated in the heat exchange cavity is uniformly heated, and the heating efficiency of the medium to be heated is improved; meanwhile, the other end of the heat exchange cavity is provided with an air outlet cavity and an induced draft fan arranged at one end of the air outlet cavity far away from the heat exchange cavity; on the one hand, go out the air cavity and be used for collecting the waste gas flow through when going out the air cavity, the liquid that the condensation generated, on the other hand under the draught fan effect, can accelerate outside waste gas entering air inlet cavity and carry out the heat exchange, has improved heat exchange efficiency greatly.
In an alternative embodiment, the method further comprises: and the liquid discharge pipe is communicated with the air outlet cavity.
It can be understood that the drain pipe is arranged for draining residual liquid in the air outlet cavity so as to assist the interior of the heat exchange device to be kept dry.
In an alternative embodiment, the heat exchange device comprises: and one end of the first plate type heat exchanger is communicated with the auxiliary heat exchange device, and the other end of the first plate type heat exchanger is communicated with the liquid inlet of the steam generator.
It can be understood that one end of the first plate heat exchanger is communicated with the auxiliary heat exchange device, the other end of the first plate heat exchanger is communicated with the liquid inlet of the steam generator, so that the medium to be heated flowing out of the auxiliary heat exchange device is heated for the second time through the first plate heat exchanger, and then the steam generation efficiency is improved.
In an alternative embodiment, the heat exchange device further comprises: one end of the second plate heat exchanger is communicated with the first plate heat exchanger; the gas inlet pipe is communicated between the first plate heat exchanger and a hydrogen outlet of the hydrogen reactor; and the air outlet pipe is communicated with the other end of the second plate heat exchanger.
As can be understood, one end of the second plate heat exchanger is communicated with the first plate heat exchanger, and the gas inlet pipe is communicated between the first plate heat exchanger and the hydrogen outlet of the hydrogen reactor; so that hydrogen generated by the hydrogen reactor can be cooled through the first plate heat exchanger and the second plate heat exchanger in sequence, and the cooling efficiency is improved.
An embodiment of the present invention further provides a hydrogen production method, including the hydrogen production system according to any one of the above embodiments, and the following steps are performed:
step one, heat exchange is carried out on a medium to be heated and waste gas flowing through the auxiliary heat exchange device, and the temperature of the medium to be heated is raised;
secondly, enabling the heated medium to flow through the first plate heat exchanger to perform secondary heat exchange with the hydrogen flowing through the first plate heat exchanger through the air inlet pipe, performing secondary temperature rise on the heated medium, and performing primary temperature reduction on the hydrogen;
conveying the heated medium to be heated to a steam generator to generate steam required for preparing hydrogen; and conveying the hydrogen subjected to primary temperature reduction to a second plate heat exchanger for secondary temperature reduction to obtain cooled hydrogen.
The first plate heat exchanger and the second plate heat exchanger are used for sequentially cooling the hydrogen flowing through, so that the cooling efficiency of the hydrogen is greatly improved; meanwhile, the self heat can be effectively utilized in the cooling process, and the temperature of the medium to be heated is increased, so that the hydrogen production efficiency is further increased.
The invention has the following beneficial effects:
1) the auxiliary heat exchange device is arranged at one end of the auxiliary heat exchange device and is respectively communicated with the hydrogen reactor and the steam generator and used for collecting waste gas generated by the steam generator and the hydrogen reactor, so that the waste gas generated by the steam generator and the hydrogen reactor is transferred to a medium to be heated flowing through the auxiliary heat exchange device, the surface temperature of the medium to be heated flowing into the steam generator is accelerated to be improved by combining the heat exchange device, the generation of steam in the steam generator is accelerated, and the overall hydrogen production efficiency is improved; the hydrogen reactor and the steam generator are respectively communicated by arranging the plurality of waste gas inlets, so that the integral installation space is reduced, and the production cost is reduced;
2) at least one heat exchange pipeline is arranged in the heat exchange cavity and used for circulating the waste gas input by the first waste gas discharge port and the second waste gas discharge port; a liquid circulation pipeline is arranged to be communicated with the heat exchange cavity, so that an external medium to be heated can conveniently flow into the heat exchange cavity through the liquid circulation pipeline, the temperature of the medium to be heated is raised through heat transfer of the heat exchange pipeline, the heated medium to be heated flows into the steam generator from the heat exchange cavity through the liquid circulation pipeline, the steam generation efficiency is improved, and the overall hydrogen production efficiency is improved;
3) a plurality of auxiliary heat exchange devices are arranged, so that the heating efficiency of the medium to be heated is improved; meanwhile, the liquid circulation pipelines of each auxiliary heat exchange device are communicated with each other, and each liquid circulation pipeline is provided with an electromagnetic valve; each liquid circulation pipeline can be independently controlled through the electromagnetic valve, so that the control flexibility of the hydrogen production system is improved to adapt to different requirements;
4) a plurality of heat exchange pipelines are arranged in the heat exchange cavity, so that under the combined action of the heat exchange pipelines, the inflow amount of waste gas in the heat exchange cavity and the heat exchange area are increased, and the heat exchange efficiency is improved; meanwhile, each heat exchange pipeline extends along the axis direction of the heat exchange cavity and is arranged in the heat exchange cavity at intervals, so that a medium to be heated in the heat exchange cavity is heated more uniformly, the medium to be heated flowing outside the heat exchange pipeline is promoted to exchange heat with waste gas in the heat exchange pipeline fully, and the heat exchange efficiency is further improved;
5) the exhaust gas heating device comprises a heat exchange cavity, an exhaust gas inlet cavity, a heat exchange pipeline, a gas inlet cavity, a gas outlet cavity, a gas inlet cavity and a gas outlet cavity, wherein the exhaust gas inlet cavity is communicated with the heat exchange pipeline; meanwhile, the other end of the heat exchange cavity is provided with an air outlet cavity and an induced draft fan arranged at one end of the air outlet cavity far away from the heat exchange cavity; on the one hand, go out the air cavity and be used for collecting the waste gas flow through when going out the air cavity, the liquid that the condensation generated, on the other hand under the draught fan effect, can accelerate outside waste gas entering air inlet cavity and carry out the heat exchange, has improved heat exchange efficiency greatly.
Drawings
Fig. 1 is a schematic structural diagram of a hydrogen production system according to an embodiment of the present invention;
FIG. 2 is a schematic view of the structure of FIG. 1 from another perspective;
FIG. 3 is a front view of FIG. 1;
FIG. 4 is a schematic structural diagram of the auxiliary heat exchange device in FIG. 1;
FIG. 5 is a bottom view of FIG. 1;
FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5;
fig. 7 is a sectional view taken along the direction B-B in fig. 5.
Description of reference numerals:
100-a hydrogen production system; 110-a distribution box; 120-auxiliary heat exchange means; 121-a collection pipe; 122-a solenoid valve; 123-an induced draft fan; 124-liquid circulation line; 1241-liquid inlet pipe; 1242-liquid outlet pipe; 125-drain pipe; 126-heat exchange tubes; 127-an air intake chamber; 128-an outlet cavity; 129-heat exchange chamber; 130-a steam generator; 131-a second exhaust gas discharge port; 140-a hydrogen reactor; 141-a first exhaust gas discharge port; 142-a hydrogen outlet; 150-a first plate heat exchanger; 160-a second plate heat exchanger; 210-a first conduit; 220-a second conduit; 230-a third conduit; 240-fourth line; 250-an air inlet pipe; 260-an air outlet pipe; 270-a liquid conduit; 280-an exhaust gas inlet; 290-exhaust outlet.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
[ first embodiment ] A method for manufacturing a semiconductor device
Referring to fig. 1, 2, 3 and 6, an embodiment of the present invention provides a hydrogen production system 100, including: hydrogen reactor 140, steam generator 130, auxiliary heat exchange means 120 and heat exchange means.
Specifically, the hydrogen reactor 140 is provided with a first off-gas discharge port 141; the steam generator 130 is provided with a second offgas discharge port 131; the auxiliary heat exchange device 120 is communicated with an external medium to be heated; the heat exchange device is communicated with the auxiliary heat exchange device 120, wherein one end of the auxiliary heat exchange device 120 is provided with a collecting pipeline 121, and the collecting pipeline 121 is provided with a plurality of waste gas inlets 280; the first exhaust gas discharge port 141 communicates with the exhaust gas inlet 280 of the collecting pipe 121 through the first pipe 210, and the second exhaust gas discharge port 131 communicates with the exhaust gas inlet 280 of the collecting pipe 121 through the second pipe 220.
The plurality of waste gas inlets 280 of the auxiliary heat exchange device 120 are respectively communicated with the first waste gas discharge port 141 and the second waste gas discharge port 131, so that waste gas generated by the steam generator 130 and the hydrogen reactor 140 is transferred to a medium to be heated flowing through the auxiliary heat exchange device 120 through waste heat generated by the auxiliary heat exchange device 120, the surface temperature of the medium to be heated flowing into the steam generator 130 is increased by combining the heat exchange device, the generation of steam in the steam generator 130 is increased, and the overall hydrogen production efficiency is improved; meanwhile, the plurality of exhaust gas inlets 280 are respectively communicated with the hydrogen reactor 140 and the steam generator 130, so that the overall installation space is reduced, and the production cost is reduced.
Further, the auxiliary heat exchanging device 120 further includes: an exhaust outlet 290. The waste gas outlet 290 is provided in the auxiliary heat exchange device 120 for discharging the waste gas after heat exchange.
Further, the method also comprises the following steps: and a liquid pipe 270 disposed between the liquid outlet end of the auxiliary heat exchange device 120 and the liquid inlet end of the heat exchange device.
The liquid pipeline 270 is connected between the liquid outlet end of the auxiliary heat exchange device 120 and the liquid inlet end of the heat exchange device, so that the medium to be heated after being heated by the auxiliary heat exchange device 120 is input into the heat exchange device for further heating, the surface temperature of the medium to be heated is further increased, and the generation of steam in the steam generator 130 is accelerated.
Further, the auxiliary heat exchanging device 120 includes: one end of the first medium channel is communicated with a medium to be heated, and the other end of the first medium channel is communicated with the heat exchange device through a liquid pipeline 270; a second medium passage having one end communicating with the hydrogen reactor 140 and the steam generator 130 through a plurality of offgas inlets 280 for circulating a heating medium; the other end is communicated with the waste gas outlet 290; the heating medium in the second medium channel is used for transferring heat to the medium to be heated in the first medium channel.
The two medium channels are used for respectively circulating the medium to be heated and the heating medium so as to realize heat exchange between the medium to be heated and the heating medium; meanwhile, the first medium channel is communicated with the heat exchange device through the liquid pipeline 270, so that the medium to be heated after heat exchange enters the heat exchange device for further heat exchange, and the surface temperature of the medium to be heated is increased.
Further, referring to fig. 4, 5, 6 and 7, the auxiliary heat exchanging device 120 includes: a heat exchange chamber 129, at least one heat exchange tube 126, and a liquid circulation line 124.
Specifically, the heat exchange cavity 129 is disposed inside the auxiliary heat exchange device 120; at least one heat exchange pipe 126 is disposed in the heat exchange cavity 129, and one end of the heat exchange pipe is respectively communicated with the first exhaust gas discharge port 141 and the second exhaust gas discharge port 131 through a plurality of exhaust gas inlets 280; the other end is communicated with the waste gas outlet 290; the liquid circulation line 124 communicates with the heat exchange chamber 129, the medium to be heated and the heat exchange means through a liquid conduit 270.
Through the arrangement of at least one heat exchange pipe 126 in the heat exchange cavity 129, exhaust gas inputted from the first exhaust gas discharge port 141 and the second exhaust gas discharge port 131 flows; the liquid circulation pipeline 124 is arranged to be communicated with the heat exchange cavity 129, so that an external medium to be heated can conveniently flow into the heat exchange cavity 129 through the liquid circulation pipeline 124, the temperature of the medium to be heated is raised through heat transfer of the heat exchange pipeline 126, the heated medium to be heated flows into the heat exchange device from the heat exchange cavity 129 through the liquid circulation pipeline 124, heat exchange is further carried out, the temperature is raised, steam generation efficiency is improved, and then the overall hydrogen production efficiency is improved.
Further, the liquid circulation line 124 includes: liquid inlet 1241 and liquid outlet 1242.
Specifically, one end of the liquid inlet pipe 1241 is communicated with the external liquid, and the other end is communicated with the heat exchange cavity 129; one end of liquid outlet pipe 1242 is communicated with heat exchange cavity 129.
The liquid inlet pipe 1241 and the liquid outlet pipe 1242 are respectively connected to two ends of the heat exchange cavity 129, so that the purpose that the medium to be heated inside the heat exchange cavity 129 is circularly heated is achieved, and the surface temperature of the medium to be heated is accelerated to be raised.
Further, the method also comprises the following steps: the distribution box 110 is provided with a medium to be heated, and the liquid outlet end of the distribution box 110 is communicated with the liquid inlet pipe 1241. Is used for inputting the medium to be heated in the distribution box 110 into the auxiliary heat exchange device 120 for heating through the liquid inlet pipe 1241.
Further, a plurality of auxiliary heat exchange devices 120 are provided; wherein, the liquid circulation pipes 124 of each auxiliary heat exchange device 120 are communicated with each other, and each liquid circulation pipe 124 is provided with a solenoid valve 122.
The heating efficiency of the medium to be heated is improved by arranging the plurality of auxiliary heat exchange devices 120; meanwhile, the liquid circulation pipes 124 of each auxiliary heat exchange device 120 are communicated with each other, and each liquid circulation pipe 124 is provided with an electromagnetic valve 122; enabling each of the liquid circulation lines 124 to be individually controlled by solenoid valves 122 increases the control flexibility of hydrogen production system 100 to accommodate different needs.
Further, a plurality of heat exchange pipes 126 are provided, and each heat exchange pipe 126 extends along the axial direction of the heat exchange cavity 129 and is arranged in the heat exchange cavity 129 at intervals.
By arranging the plurality of heat exchange pipes 126 in the heat exchange cavity 129, the inflow amount of waste gas and the heat exchange area in the heat exchange cavity 129 are increased under the combined action of the plurality of heat exchange pipes 126, and the heat exchange efficiency is improved; meanwhile, each heat exchange pipe 126 extends along the axial direction of the heat exchange cavity 129 and is arranged in the heat exchange cavity 129 at intervals, so that the medium to be heated in the heat exchange cavity 129 is heated more uniformly, the flowing medium to be heated outside the heat exchange pipes 126 is promoted to exchange heat with the waste gas in the heat exchange pipes 126 fully, and the heat exchange efficiency is further improved.
Further, the heat exchange pipe 126 is a straight pipe or a coil pipe.
Specifically, the heat exchanging pipes 126 are a plurality of straight pipes, and each heat exchanging pipe 126 extends along the axial direction of the heat exchanging cavity 129 and is disposed in the heat exchanging cavity 129 at intervals.
The heat exchange pipelines 126 are arranged into a plurality of straight pipes, so that the heat exchange pipelines 126 can be conveniently installed in the heat exchange cavity 129, and the heat exchange efficiency of the medium to be heated in the heat exchange cavity 129 is rapidly improved under the combined action of the plurality of heat exchange pipelines 126;
for example, the heat exchange tubes 126 in the form of straight tubes have one end with a diameter that gradually increases or decreases along the length thereof.
Preferably, the diameter of one end communicated with the external medium to be heated is larger than that of the other end of the heat exchange pipe 126.
Alternatively, the heat exchange pipe 126 is a coil pipe, and is disposed around the axis of the hydrogen reaction and coaxial with the heat exchange cavity 129.
By arranging the heat exchange pipeline 126 as a coil, the heat conduction surface between the heat exchange pipeline 126 and an external medium to be heated can be increased, and the heat conduction effect is improved; meanwhile, the heat exchange pipeline 126 is arranged to be a coil pipe, the strength of the coil pipe is higher, the flowing time of waste gas in the pipe is prolonged, the waste gas in the heat exchange pipeline 126 can fully exchange heat with the medium to be heated outside the pipe, the heat of the medium to be heated is promoted more quickly, and the hydrogen production efficiency of the hydrogen production system 100 is improved.
Further, the auxiliary heat exchanging device 120 further includes: an air inlet cavity 127, an air outlet cavity 128 and an induced draft fan 123.
Specifically, the air intake chamber 127 is located at one end of the heat exchange chamber 129 near the exhaust gas inlet 280, and is communicated with the heat exchange pipe 126; the gas outlet cavity 128 is located at one end of the heat exchange cavity 129 close to the waste gas outlet 290, and one end of the gas outlet cavity is communicated with the heat exchange pipe 126, and the other end of the gas outlet cavity is communicated with the waste gas outlet 290; the induced draft fan 123 is communicated with the air outlet cavity 128 through an exhaust outlet 290.
The air inlet cavity 127 communicated with the heat exchange pipes 126 is arranged at one end of the heat exchange cavity 129, so that a buffer area is formed at the air inlet cavity 127, when waste gas enters the air inlet cavity 127, the waste gas can be uniformly introduced into each heat exchange pipe 126, each heat exchange pipe 126 in the heat exchange cavity 129 can uniformly heat, a medium to be heated in the heat exchange cavity 129 is uniformly heated, and the heating efficiency of the medium to be heated is improved; meanwhile, the other end of the heat exchange cavity 129 is provided with an air outlet cavity 128 and an induced draft fan 123 arranged at one end of the air outlet cavity 128 far away from the heat exchange cavity 129; on the one hand, go out the time cavity 128 and be used for collecting the waste gas stream and go out the time cavity 128, the liquid that the condensation generated, on the other hand under the effect of draught fan 123, can accelerate outside waste gas entering air inlet cavity 127 in and carry out heat exchange, improved heat exchange efficiency greatly.
Further, the method also comprises the following steps: and a drain tube 125 communicating with the outlet chamber 128.
The drain pipe 125 is provided for draining the residual liquid in the air outlet cavity 128, so as to keep the inside of the auxiliary heat exchange device 120 dry.
Further, referring to fig. 1, 2, 3 and 4, the heat exchange device includes a first plate heat exchanger 150, one end of the first plate heat exchanger 150 is communicated with the liquid outlet pipe 1242 through a liquid pipe 270, and the other end is communicated with the liquid inlet of the steam generator 130 through a third pipeline 230.
One end of the first plate heat exchanger 150 is communicated with the liquid outlet pipe 1242, and the other end of the first plate heat exchanger is communicated with the liquid inlet of the steam generator 130 through the third pipeline 230, so that the medium to be heated is heated for the second time through the first plate heat exchanger 150, and then the steam generation efficiency is improved.
Further, heat transfer device still includes: a second plate heat exchanger 160, an inlet pipe 250 and an outlet pipe 260.
Specifically, one end of the second plate heat exchanger 160 is communicated with the first plate heat exchanger 150 through a fourth pipeline 240; the gas inlet pipe 250 is communicated between the first plate heat exchanger 150 and the hydrogen outlet 142 of the hydrogen reactor 140; and the outlet pipe 260 is communicated with the other end of the second plate heat exchanger 160.
One end of the second plate heat exchanger 160 is communicated with the first plate heat exchanger 150, and the air inlet pipe 250 is communicated between the first plate heat exchanger 150 and the hydrogen outlet 142 of the hydrogen reactor 140; the hydrogen generated by the hydrogen reactor 140 can be cooled sequentially through the first plate heat exchanger 150 and the second plate heat exchanger 160, so that the cooling efficiency is improved.
The medium to be heated is methanol, water or a mixture of the two, and the heating medium is the exhaust gas generated by the hydrogen reactor 140 and the steam generator 130.
[ second embodiment ]
The embodiment of the present invention further provides a hydrogen production method, including the hydrogen production system described in the first embodiment, which performs the following steps:
step one, heat exchange is carried out on a medium to be heated and the waste gas flowing through the auxiliary heat exchange device 120, so as to raise the temperature of the medium to be heated;
secondly, enabling the heated medium to flow through the first plate heat exchanger 150, performing secondary heat exchange with the hydrogen flowing through the first plate heat exchanger 150 through the air inlet pipe 250, performing secondary temperature rise on the heated medium, and performing primary temperature reduction on the hydrogen;
step three, conveying the heated medium to be heated to the steam generator 130 to generate steam required for preparing hydrogen; and conveying the primarily cooled hydrogen to a second plate heat exchanger 160 for secondary cooling to obtain cooled hydrogen.
The first plate heat exchanger 150 and the second plate heat exchanger 160 are used for sequentially cooling the hydrogen flowing through, so that the cooling efficiency of the hydrogen is greatly improved; meanwhile, the self heat can be effectively utilized in the cooling process, and the temperature of the medium to be heated is increased, so that the hydrogen production efficiency is further increased.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected by one skilled in the art without departing from the spirit and scope of the invention, as defined in the appended claims.
Claims (10)
1. A hydrogen production system, comprising:
a hydrogen reactor (140);
a steam generator (130);
the auxiliary heat exchange device (120) is communicated with an external medium to be heated; and provided with a plurality of waste gas inlets (280);
a heat exchange device in communication with the auxiliary heat exchange device (120);
wherein the plurality of off-gas inlets (280) communicate with the hydrogen reactor (140) and the steam generator (130), respectively.
2. The system for producing hydrogen of claim 1, wherein the auxiliary heat exchange device (120) further comprises:
and the waste gas outlet (290) is arranged on the auxiliary heat exchange device (120) opposite to the waste gas inlet (280) and is communicated with the waste gas inlet (280).
3. The hydrogen production system of claim 2, further comprising:
and the liquid pipeline (270) is arranged between the liquid outlet end of the auxiliary heat exchange device (120) and the liquid inlet end of the heat exchange device.
4. The system for producing hydrogen of claim 3, wherein the auxiliary heat exchange device (120) comprises:
one end of the first medium channel is communicated with the medium to be heated, and the other end of the first medium channel is communicated with the heat exchange device through the liquid pipeline (270);
a second medium passage having one end communicating with the hydrogen reactor (140) and the steam generator (130) through the plurality of exhaust gas inlets (280) for circulating a heating medium; the other end is communicated with the waste gas outlet (290);
wherein the heating medium in the second medium passage is used to transfer heat to the medium to be heated in the first medium passage.
5. The hydrogen production system as claimed in claim 4, wherein the hydrogen reactor (140) is provided with a first exhaust gas discharge port (141), the steam generator (130) is provided with a second exhaust gas discharge port (131), and the auxiliary heat exchange device (120) comprises:
the heat exchange cavity (129) is arranged inside the auxiliary heat exchange device (120);
at least one heat exchange pipe (126) arranged in the heat exchange cavity (129), and one end of the heat exchange pipe is communicated with the first waste gas discharge port (141) and the second waste gas discharge port (131) through the plurality of waste gas inlets (280); the other end is communicated with the waste gas outlet (290);
a liquid circulation pipeline (124) communicating the heat exchange cavity (129), the medium to be heated and the heat exchange device through the liquid pipeline (270).
6. The hydrogen production system according to claim 5, wherein the auxiliary heat exchange device (120) is provided in plurality;
the liquid circulation pipelines (124) of each auxiliary heat exchange device (120) are communicated with each other, and an electromagnetic valve (122) is arranged on each liquid circulation pipeline (124).
7. The hydrogen production system as claimed in claim 5, wherein the auxiliary heat exchange device (120) further comprises:
an air inlet chamber (127) located at one end of the heat exchange chamber (129) close to the waste gas inlet (280) and communicated with the heat exchange pipe (126);
an outlet chamber (128) located at an end of the heat exchange chamber (129) adjacent to the exhaust gas outlet (280), and having one end communicating with the heat exchange conduit (126) and the other end communicating with the exhaust gas outlet (290);
and the induced draft fan (123) is communicated with the air outlet cavity (128) through the waste gas outlet (290).
8. The hydrogen production system of claim 7, further comprising:
a drain (125) in communication with the outlet chamber (128).
9. The hydrogen generation system of claim 1, wherein the heat exchange means comprises:
and one end of the first plate type heat exchanger (150) is communicated with the auxiliary heat exchange device (120), and the other end of the first plate type heat exchanger is communicated with a liquid inlet of the steam generator (130).
10. The hydrogen generation system of claim 9, wherein the heat exchange device further comprises:
a second plate heat exchanger (160) having one end communicating with the first plate heat exchanger (150);
an inlet pipe (250) communicating between the first plate heat exchanger (150) and the hydrogen outlet (142) of the hydrogen reactor (140);
and the air outlet pipe (260) is communicated with the other end of the second plate heat exchanger (160).
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| CN116443813A (en) * | 2023-02-27 | 2023-07-18 | 福州大学 | Ammonia decomposition reaction device and system |
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