CN116960393A - Pile-up integrated device in solid oxide fuel cell power generation system - Google Patents
Pile-up integrated device in solid oxide fuel cell power generation system Download PDFInfo
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- 239000012495 reaction gas Substances 0.000 claims abstract description 40
- 239000000376 reactant Substances 0.000 claims abstract description 30
- 238000003487 electrochemical reaction Methods 0.000 claims abstract description 24
- 230000010354 integration Effects 0.000 claims description 49
- 238000005192 partition Methods 0.000 claims description 9
- 229920000742 Cotton Polymers 0.000 claims description 8
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04014—Heat exchange using gaseous fluids; Heat exchange by combustion of reactants
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The disclosure relates to a pile-up integrated device in a solid oxide fuel cell power generation system, and belongs to the field of solid oxide fuel cell power generation. The pile-up integrated device in the solid oxide fuel cell power generation system comprises a hot box, a plurality of power generation modules, a reaction gas heat exchanger and a main conductive piece, wherein the reaction gas heat exchanger is used for carrying out heat exchange on reaction gas supplied to each power generation module and high-temperature tail gas discharged from each power generation module; the power generation modules are arranged in the hot box and are respectively used for enabling the reactant gas to generate electrochemical reaction to generate electric energy, and each power generation module is electrically connected with the main conductive piece so that the generated electric energy is collected and output through the main conductive piece; wherein, the hot box is used for maintaining the temperature environment required by the electrochemical reaction of each power generation module. The pile-up device in the solid oxide fuel cell power generation system solves the problem that the pile-up device is difficult to apply to a large-scale SOFC power generation system.
Description
Technical Field
The present disclosure relates to the field of solid oxide fuel cell power generation technology, and in particular, to a stack integration device in a solid oxide fuel cell power generation system.
Background
The solid oxide fuel cell (Solid oxide fuel cell, SOFC) power generation system is a device for directly converting chemical energy into electric energy, can use hydrogen as fuel, has the outstanding advantages of high power generation efficiency, zero pollution, zero carbon emission and the like, and is a power generation mode with great commercial prospect.
SOFC power generation systems generate electricity within a stack integrated device. The single power output of the SOFC stack is small, so if the SOFC power generation system needs to output high-power electric energy to the outside, a plurality of SOFC stacks need to be integrated together to form a stack integrated device. In the working process of the SOFC power generation system, cathode gas and cathode gas firstly rise in temperature to the reaction temperature through a preheater and a regenerator, then enter a galvanic pile integration device, undergo electrochemical reaction in the integration device, output electric energy to the outside, and reaction tail gas flows out of the galvanic pile integration device. Therefore, the stack integration device of the SOFC power generation system is the most central component of the power generation system.
The design of the stack integrated device is a key task of the design of the SOFC power generation system. In US 7659022B2 and US 2012/0178003A1, the cell stack device is an annular array formed by a plurality of rows of cell stack groups circumferentially arranged; each column of electric pile group is formed by stacking a plurality of single electric piles up and down; each of the single stacks Cheng Shuzhi is disposed such that the plane formed by the air inlet and outlet holes of each of the single stacks is substantially parallel to the horizontal plane. Chinese patent CN 2013102129205 provides a novel cell stack array. The pile array comprises a support body and a pile group; the support body is in a layered structure; the electric pile array is composed of one or more than two electric pile groups; at least one galvanic pile group for each layer of support; each pile group is composed of a plurality of single piles, and each single pile is in a horizontal shape.
However, the above pile devices all adopt the annular layered integration mode of the pile. The disadvantage of this approach is: it is difficult to apply to large SOFC power generation systems.
Disclosure of Invention
The present disclosure provides a stack integration device in a solid oxide fuel cell power generation system, which solves the problem that the stack device in the related art is difficult to be applied to a large-sized SOFC power generation system.
In order to achieve the above object, the present disclosure provides a stack integration apparatus in a solid oxide fuel cell power generation system, including a hot box, a plurality of power generation modules, a reaction gas heat exchanger for heat exchanging reaction gas supplied into each of the power generation modules and high temperature exhaust gas discharged from each of the power generation modules, and a main conductive member; the power generation modules are arranged in the hot box and are respectively used for enabling the reactant gases to undergo electrochemical reaction to generate electric energy, and each power generation module is electrically connected with the main conductive piece so that the generated electric energy is collected and output through the main conductive piece; wherein the hot box is used for maintaining the temperature environment required by the electrochemical reaction of each power generation module.
Optionally, each of the power generation modules includes at least one stack inside.
Alternatively, a plurality of the stacks are connected in series or in parallel.
Optionally, a plurality of the stacks are stacked in a vertical direction to form a stack tower.
Optionally, the number of the stack towers in each of the power generation modules is equal to or less than 12, and the number of the electric stacks in each of the stack towers is equal to or less than 10.
Optionally, a plurality of the stack towers are arranged in a ring shape around the center of the power generation module.
Optionally, the hot box comprises a base plate on which a plurality of the power generation modules are arranged; alternatively, the thermal box includes a bottom plate and at least one partition plate arranged at intervals from the bottom plate in a vertical direction, and a plurality of the power generation modules are respectively arranged on the bottom plate and the partition plate.
Optionally, the plurality of power generation modules are arranged in a linear, rectangular, square or annular manner on the bottom plate and/or the partition plate.
Optionally, the reactant gas heat exchanger includes a preheater and a regenerator, and the plurality of power generation modules are configured as one or more shared preheaters and regenerators.
Optionally, the power generation module includes a plurality of pile towers that annular is arranged, and is a plurality of pile towers's top is provided with first electrically conductive piece, and the bottom is provided with the second electrically conductive piece, a plurality of pile towers are last still be provided with the reaction gas entry of reaction gas heat exchanger intercommunication for carry each with the reaction gas after heating in the pile tower, and with the reaction gas export of reaction gas heat exchanger intercommunication is used for each high temperature tail gas in the pile tower carries to in the reaction gas heat exchanger to make high temperature tail gas and the reaction gas that waits to heat carry out the heat exchange.
The reactor towers are used for enabling the reactant gases to perform electrochemical reaction to generate electric energy, and the electric energy generated by each reactor tower is collected to the main conductive piece through the first conductive piece and the second conductive piece and is output through the main conductive piece.
Optionally, the reaction gas heat exchanger includes an anode gas heat exchanger and a cathode gas heat exchanger, the anode gas heat exchanger is used for performing heat exchange between anode gas supplied to each of the power generation modules and high-temperature anode off-gas discharged from each of the power generation modules; the cathode gas heat exchanger is used for carrying out heat exchange on cathode gas supplied to each power generation module and high-temperature cathode tail gas discharged from each power generation module; the power generation module is used for enabling anode gas and cathode gas to electrochemically react to generate electric energy.
Optionally, the main conductive member includes a positive conductive member and a negative conductive member, and the electric energy generated in each of the power generation modules is collected and output through the positive conductive member and the negative conductive member.
Optionally, the power generation module comprises a negative plate, a plurality of pile towers which are arranged on the negative plate in an annular manner, a positive electrode conducting rod which is arranged at the top of the pile towers, an anode gas inlet pipe, an anode gas outlet pipe, a cathode gas inlet pipe and a cathode gas outlet pipe which are communicated with the pile towers, wherein the anode gas inlet pipe is communicated with the anode gas heat exchanger and is used for conveying heated anode gas into each pile tower; the anode gas exhaust pipe is also communicated with the anode gas heat exchanger and is used for conveying high-temperature anode tail gas in each pile tower to the anode gas heat exchanger; the cathode gas inlet pipe is communicated with the cathode gas heat exchanger and is used for conveying the heated cathode gas to each pile tower; the cathode gas exhaust pipe is also communicated with the cathode gas heat exchanger and is used for conveying the high-temperature cathode tail gas in each pile tower to the cathode gas heat exchanger.
The electric energy generated by the electrochemical reaction in each pile tower is collected to the positive electrode conductive piece through the positive electrode conductive rod, is collected to the negative electrode conductive piece through the negative electrode plate, and is output through the positive electrode conductive piece and the negative electrode conductive piece.
Optionally, the heat box is constructed as the cotton structure keeps warm, the cotton structure keeps warm including setting up at outside metal box and cladding the inside cotton that keeps warm of metal box.
Optionally, the hot box is configured as a kiln structure.
According to the high-power generation device, the plurality of power generation modules are arranged in the hot box, the reaction gas is intensively supplied through the reaction gas heat exchanger, and finally, the electric energy generated by each power generation module is collected and uniformly output, so that the high-power generation requirement is realized.
Specifically, the pile-up unit in the solid oxide fuel cell power generation system of the disclosure is composed of uniformly customized identical power generation modules, and then the power generation power is improved by assembling a plurality of power generation modules with the same specification.
In addition, other features and advantages of the present disclosure will be described in detail in the detailed description section that follows.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:
FIG. 1 is a schematic structural view of one embodiment provided by a stack integration device in a solid oxide fuel cell power generation system of the present disclosure, wherein the side walls and top of the hot box are omitted;
FIG. 2 is a schematic structural view of another embodiment provided by a stack integration in a SOFC power generation system of the present disclosure, wherein the side walls and top of the hot box, the main electrical conductors, and the various gas lines communicating with the reactant gas heat exchangers are omitted;
FIG. 3 is a schematic view of the structure of a power generation module in a stack integrated device in a solid oxide fuel cell power generation system of the present disclosure;
FIG. 4 is a schematic structural view of a power generation module in a stack integration device in a solid oxide fuel cell power generation system of the present disclosure, wherein the arrangement of a plurality of stack towers in a single power generation module is shown;
fig. 5 is a schematic structural view of a stack tower in a stack integration device in a solid oxide fuel cell power generation system of the present disclosure, in which an arrangement of a plurality of stacks within a single stack tower is shown.
Description of the reference numerals
1-a hot box; 11-a bottom plate; 12-a separator;
2-a power generation module; 21-stacking the towers; 211-galvanic pile; 22-a first conductive member; 221-positive electrode conductive rod;
23-a second conductive member; 231-negative plate;
24-reaction gas inlet; 241-anode gas inlet pipe; 242-cathode gas inlet pipe;
25-a reaction gas outlet; 251-anode gas exhaust pipe; 252-cathode gas exhaust pipe;
3-a reaction gas heat exchanger; 31-an anode gas heat exchanger; 32-a cathode gas heat exchanger;
4-main conductor; 41-positive electrode conductive member; 42-negative electrode conductive member.
Detailed Description
Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure. In this disclosure, unless otherwise indicated, terms of orientation such as "upper, lower, left, right" and "upper" are used generally to refer to orientations in the drawings, and "inner, outer" are used to refer to inner, outer relative to the contour of the component or structure itself. In addition, it should be noted that terms such as "first, second", etc. are used to distinguish one element from another element without order or importance. In addition, in the description with reference to the drawings, the same reference numerals in different drawings denote the same elements. The foregoing definitions are provided for the purpose of illustrating and explaining the present disclosure and should not be construed as limiting the present disclosure.
Referring to fig. 1 and 2, the present disclosure provides a stack integration apparatus in a solid oxide fuel cell power generation system, including a hot box 1, a plurality of power generation modules 2, a reaction gas heat exchanger 3, and a main conductive member 4, the reaction gas heat exchanger 3 being for heat exchanging reaction gas supplied into each power generation module 2 and high temperature exhaust gas discharged from each power generation module 2; the power generation modules 2 are arranged in the hot box 1 and are respectively used for enabling the reactant gas to undergo electrochemical reaction to generate electric energy, and each power generation module 2 is electrically connected with the main conductive piece 4 so that the generated electric energy is collected and output through the main conductive piece 4; wherein the hot box 1 is used to maintain a temperature environment required for the electrochemical reaction of each power generation module 2.
The power generation device disclosed by the disclosure realizes high-power generation requirements by arranging a plurality of power generation modules 2 in the hot box 1, intensively supplying reaction gas through the reaction gas heat exchanger 3 and finally collecting and uniformly outputting electric energy generated by each power generation module 2.
Specifically, the pile-up integrated device of the present disclosure is composed of identical power generation modules 2 customized uniformly, and then the power generation power is improved by assembling a plurality of power generation modules 2 with the same specification, and because each power generation module 2 in the present disclosure is relatively independent, the setting mode is flexible, and can be single-layer arrangement or multi-layer arrangement, so that the power generation power of the pile-up integrated device in the solid oxide fuel cell power generation system of the present disclosure is not limited by the structure, and the power generation modules 2 with corresponding numbers can be flexibly arranged according to the actual requirements, and the power generation power range of the pile-up integrated device in the solid oxide fuel cell power generation system covers the power generation levels of hundred kilowatts, megawatts, hundred megawatts and the like.
In addition, the reaction gases required by each power generation module 2 in the present disclosure are all communicated with the main pipeline on the reaction gas heat exchanger 3 through respective pipelines, so that the gas paths of the reaction gases leading to each power generation module 2 can be controlled independently without being influenced by the gas paths of the reaction gases in other power generation modules 2, and the power generation power of the present disclosure can be further flexibly changed according to actual requirements.
In addition, in the present disclosure, only the corresponding pipelines are required to be provided for each power generation module 2, and then the gas distribution branches capable of supplying gas to the stack towers 21 in each power generation module 2 are provided on the pipelines, and all the stacks 211 in the stack towers 21 are uniformly supplied with gas through the gas distribution branches, so that it is not necessary to separately provide the gas distribution pipeline for each stack 211 in the stack towers 21 in the structure of the present disclosure, and therefore, on the premise of simplifying the structure of the device, on one hand, the installation workload of the stacks 211 is saved, and on the other hand, the risk of accidents of the stack integration device in the solid oxide fuel cell power generation system is also reduced.
In addition, since the present disclosure adopts a modularized design, on one hand, each power generation module 2 can be controlled individually, so that the stack integrated device in the solid oxide fuel cell power generation system can flexibly adjust the output power according to the external load demand, and the response speed is very fast with little delay. On the other hand, the modular design also facilitates maintenance. During operation of the SOFC power generation system, the stack 211 may be damaged and may need to be replaced. However, when the technical scheme of the present disclosure is adopted, by finding the power generation module 2 where the damaged stack 211 is located, the damaged power generation module 2 is replaced with a new power generation module 2, and the sofc power generation system can continue to operate. At this time, the power generation module 2 including the damaged stack 211 can be maintained separately outside the stack integration device in the solid oxide fuel cell power generation system, so that the maintenance efficiency of the SOFC power generation system is greatly improved by adopting this technical scheme.
Furthermore, the present disclosure is simple and efficient in design and installation. Specifically, the present disclosure employs a three-level integrated structure of a stack-module-device, where the functions of supplying air, taking electricity, etc. of the stack 211 are assigned to the module level, and the requirements of power and voltage, etc. of the system are assigned to the device level. Therefore, it is sufficient to develop a power generation module 2 for a certain type of stack 211. The power and voltage requirements of the SOFC power generation system can be met by determining the number of power generation modules 2 and the gas circuit and circuit connection mode. It can be seen that the present disclosure not only greatly reduces the development work of the power generation module 2 and shortens the development period, but also contributes to the improvement of the safety and economy of the power generation module 2 because of focusing on the development of one kind of power generation module 2. Accordingly, in the production and installation stages, the centralized production of the power generation modules 2 can be realized, and the power generation modules 2 are assembled together at the installation site of a pile integrated device in the solid oxide fuel cell power generation system, so that the working time and the workload of an engineering site are greatly saved, the engineering investment is obviously reduced, and the method is very suitable for a large-scale SOFC power generation system.
As is clear from the above, the power generation module 2 of the present disclosure includes only the stack 21, and necessary air supply and exhaust devices and power take-off devices, and auxiliary devices such as the reaction gas heat exchanger 3 are integrated at the system level. The effect that it brings is: the structure of the power generation module 2 is simplified, the function of the power generation module as a core component in a pile integrated device in a solid oxide fuel cell power generation system is highlighted, the structure is more convenient to improve, and conditions are provided for better electrochemical reaction of the internal pile 211; the reaction gas heat exchanger, the burner and the reformer are arranged on the system level, so that the integration level of the system is improved, the complexity of the system is reduced, the working stability of the system is improved, and the working efficiency of each component and the working efficiency of the system are improved; each power generation module 2 is independently arranged, so that the modular design of the system is facilitated, the installation is convenient, the design efficiency and the installation efficiency can be improved, the design and the installation time are shortened, and the maintenance is convenient; each power generation module 2 is independently arranged, so that the manufacturing cost of each power generation module 2 can be greatly reduced, the design, installation and maintenance costs are reduced, and the economical efficiency of the system is improved.
It should be noted that, in the above description, the part of each power generation module 2 including a plurality of stack towers 21 and each stack tower 21 including a plurality of stacks 211 will be described in detail below.
In the embodiment provided in the present disclosure, at least one stack 211 is included inside each power generation module 2, and by such an arrangement, it is possible to generate electric power by an electrochemical reaction occurring inside each power generation module 2, thereby outputting the electric power to the stack integration device in the whole solid oxide fuel cell power generation system. Here, the number of the stacks 211 provided inside each power generation module 2 may be one, two, or more, etc., and the present disclosure is not limited thereto, specifically, the object of the present disclosure can be achieved.
The plurality of stacks 211 may be connected in series or in parallel, and the present disclosure is not limited thereto, and specifically, the object of the present disclosure may be achieved. Here, the electrical connection manner between the plurality of stacks 211 is not limited to the above two manners, but may be a series-parallel connection, and specifically may be flexibly selected according to actual situations.
In the embodiment provided in the present disclosure, referring to fig. 5, a plurality of electric stacks 211 are stacked in a vertical direction to form a stack tower 21. Here, the air inlet pipelines between the adjacent stacks 211 are communicated with each other, and the air outlet pipelines between the adjacent stacks 211 are also communicated with each other, so that the arrangement is convenient for uniformly supplying air in the stack integrated device in the solid oxide fuel cell power generation system to the plurality of stacks 211 therein through each power generation module 2, thereby simplifying the structure of each power generation module 2 and facilitating the installation.
In the embodiment provided in the present disclosure, the number of the stack towers 21 in each power generation module 2 is equal to or less than 12, and the number of the electric stacks 211 in each stack tower 21 is equal to or less than 10. Here, the number of stack towers 21 to be arranged in each power generation module 2 and the number of electric stacks 211 to be arranged in each stack tower 21 need to be comprehensively considered according to the generated power demand and the integration level of each power generation module 2. The number of the stack towers 21 in each power generation module 2 may be 1, 6, 8, 10, or 12, or may be any one of 1 to 12, for example, and the present embodiment is not limited thereto, and specifically, it is possible to achieve the object of the present disclosure.
Wherein, referring to fig. 4, a plurality of stack towers 21 are arranged in a ring shape around the center of the power generation module 2, such arrangement is convenient for enabling gas to enter into each stack tower more uniformly. In other embodiments, the plurality of tower stacks 21 may also be arranged in a zig-zag configuration, which is not particularly limited in this disclosure.
In the specific embodiments provided in the present disclosure, the hot box 1 may be constructed in any suitable manner. In one embodiment, referring to fig. 1, the thermal box 1 includes a bottom plate 11, and a plurality of power generation modules 2 are arranged on the bottom plate 11. In other embodiments, referring to fig. 2, the heat box 1 includes a bottom plate 11 and at least one partition plate 12 arranged to be spaced apart from the bottom plate 11 in a vertical direction, and a plurality of power generation modules 2 are respectively arranged on the bottom plate 11 and the partition plate 12. By uniformly disposing the power generation modules 2 on the bottom plate 11 or the separator 12, it is possible to dispose a large number of power generation modules 2 in a limited space in the entire stack integration device in the solid oxide fuel cell power generation system, wherein the separator 12 is provided so as to be spaced apart from the bottom plate 11 in the vertical direction also in order to enable a high integration of a plurality of power generation modules 2 in the stack integration device in the solid oxide fuel cell power generation system. Illustratively, the number of baffles 12 herein may be one, two, or more, and the present disclosure is not limited in this regard, and in particular, the present disclosure may be directed to achieving the objects of the present disclosure.
In the specific embodiments provided in the present disclosure, the plurality of power generation modules 2 may be arranged in any suitable manner. In one embodiment, a plurality of power generation modules 2 are arranged in a linear, rectangular, square or annular manner on the base plate 11. In another embodiment, a plurality of power generation modules 2 are arranged in a linear, rectangular, square, or annular manner on the separator 12. In still other embodiments, the plurality of power generation modules 2 are arranged in a linear, rectangular, square or annular manner on both the base plate 11 and the partition plate 12. The above arrangement is not limited thereto, and may be flexibly arranged according to actual circumstances, which is not particularly limited by the present disclosure.
In the specific embodiments provided in the present disclosure, the reactant gas heat exchanger 3 may be configured in any suitable manner. In one embodiment, the reactant gas heat exchanger 3 includes a preheater and a regenerator, and the plurality of power generation modules 2 are configured as one common preheater and regenerator. Since the SOFC fuel cell needs to have a high operating temperature, which is about 750 ℃, the reactant gas needs to be preheated in the preheater before entering each power generation module 2, and then heated in the regenerator for the second time, so as to meet the high temperature conditions required by the SOFC fuel cell. In addition, the arrangement of one common preheater and one common regenerator for the plurality of power generation modules 2 can make the integration level of the stack integration device in the solid oxide fuel cell power generation system higher, the structure simpler, the working stability higher, and the working efficiency of each component and the working efficiency of the stack integration device in the whole solid oxide fuel cell power generation system higher. In other embodiments, the reactant gas heat exchanger 3 includes a preheater and a regenerator, and the plurality of power generation modules 2 are configured as a plurality of common preheaters and regenerators, so arranged as to ensure that a sufficient amount of reactant gas can be supplied to each of the power generation modules 2 even in the case where the power generation is large.
In the specific embodiment provided in the present disclosure, referring to fig. 1 to 4, the power generation module 2 includes a plurality of stack towers 21 arranged in a ring shape, a first conductive member 22 is provided at the top of the plurality of stack towers 21, a second conductive member 23 is provided at the bottom of the plurality of stack towers 21, a reactant gas inlet 24 in communication with the reactant gas heat exchanger 3 is further provided on the plurality of stack towers 21 for delivering heated reactant gas into each stack tower 21, and a reactant gas outlet 25 in communication with the reactant gas heat exchanger 3 for delivering high temperature tail gas in each stack tower 21 into the reactant gas heat exchanger 3 so as to exchange heat between the high temperature tail gas and the reactant gas to be heated.
The stack towers 21 are used for enabling the reactant gases to perform electrochemical reaction to generate electric energy, and the electric energy generated by each stack tower 21 is collected to the main conductive piece 4 through the first conductive piece 22 and the second conductive piece 23 and is output through the main conductive piece 4.
In the above technical solution, the plurality of annularly arranged stack towers 21 in each power generation module 2 are all communicated with the reactant gas heat exchanger 3 through corresponding pipelines, which has the functions of, on one hand, conveying the reactant gas heated by the reactant gas heat exchanger 3 into each stack tower 21 so as to enable the reactant gas to undergo electrochemical reaction in each stack tower 21 to generate electric energy, and on the other hand, conveying the high-temperature tail gas in each stack tower 21 into the reactant gas heat exchanger 3 so as to enable the high-temperature tail gas of the part to be subjected to heat exchange with the reactant gas to be heated in the reactant gas heat exchanger 3. Wherein, after the electrochemical reaction of the reaction gas in each stack 21, the generated electric energy is collected to the main conductive member 4 of the stack integrated device in the whole solid oxide fuel cell power generation system through the first conductive member 22 and the second conductive member 23, and finally output to the required load through the main conductive member 4.
In the embodiment provided in the present disclosure, referring to fig. 1 and 2, the reaction gas heat exchanger 3 includes an anode gas heat exchanger 31 and a cathode gas heat exchanger 32, and the anode gas heat exchanger 31 is used to exchange heat between anode gas supplied into each power generation module 2 and high-temperature anode off-gas discharged from each power generation module 2.
The cathode gas heat exchanger 32 is used to exchange heat between the cathode gas supplied to each of the power generation modules 2 and the high-temperature cathode off-gas discharged from each of the power generation modules 2.
The power generation module 2 is for electrochemically reacting anode gas and cathode gas to generate electric power.
Among them, the main conductive member 4 includes a positive conductive member 41 and a negative conductive member 42, and electric energy generated in each of the power generation modules 2 is collected and output through the positive conductive member 41 and the negative conductive member 42.
In the above-mentioned embodiments, the reaction gas includes cathode gas and anode gas, wherein the anode gas heat exchanger 31 is used for performing heat exchange between the anode gas to be heated and the high-temperature anode tail gas, and the cathode gas heat exchanger 32 is used for performing heat exchange between the cathode gas to be heated and the high-temperature cathode tail gas. Accordingly, each of the power generation modules 2 electrochemically reacts the heated anode gas and cathode gas to generate electric power, and the electric power is collected and outputted through the positive electrode conductive member 41 and the negative electrode conductive member 42.
In the embodiment provided in the present disclosure, referring to fig. 1 to 4, the power generation module 2 includes a negative electrode plate 231, a plurality of stack towers 21 disposed on the negative electrode plate 231 and annularly arranged, a positive electrode conductive rod 221 disposed at the top of the stack towers 21, an anode gas inlet pipe 241 communicating with the plurality of stack towers 21, an anode gas outlet pipe 251, a cathode gas inlet pipe 242, and a cathode gas outlet pipe 252, the anode gas inlet pipe 241 communicating with the anode gas heat exchanger 31 for delivering heated anode gas into each stack tower 21; the anode gas exhaust pipe 251 is also communicated with the anode gas heat exchanger 31 for conveying the high-temperature anode off-gas in each stack 21 into the anode gas heat exchanger 31; a cathode gas inlet pipe 242 communicating with the cathode gas heat exchanger 32 for delivering the heated cathode gas to each stack 21; a cathode gas exhaust pipe 252 is also in communication with the cathode gas heat exchanger 32 for delivering the high temperature cathode exhaust gas in each stack 21 to the cathode gas heat exchanger 32.
The electric energy generated by the electrochemical reaction in each stack 21 is collected to the positive electrode conductive member 41 through the positive electrode conductive rod 221, and is collected to the negative electrode conductive member 42 through the negative electrode plate 231, and is output through the positive electrode conductive member 41 and the negative electrode conductive member 42.
In the above technical solution, each power generation module 2 includes a plurality of annularly arranged towers 21, the anode gas heat exchangers 31 provide anode gas required for reaction to each tower 21 through the anode gas inlet pipe 241, the cathode gas heat exchangers 32 provide cathode gas required for reaction to each tower 21 through the cathode gas inlet pipe 242, wherein the anode gas and the cathode gas undergo electrochemical reaction in each tower 21 to generate electric energy, and the high-temperature anode tail gas and the high-temperature cathode tail gas after electrochemical reaction are directly discharged to waste heat energy due to higher temperature, so that the high-temperature anode tail gas and the high-temperature cathode tail gas are respectively conveyed to the respective corresponding anode gas heat exchangers 31 and cathode gas heat exchangers 32, and are discharged after heat exchange with the reactant gas to be heated in the corresponding gas heat exchangers. And each stack 21, after undergoing an electrochemical reaction, outputs the generated electric power through the respective positive electrode conductive rod 221 and negative electrode plate 231.
In the specific embodiments provided in the present disclosure, the hot box 1 may be constructed in any suitable manner. Here, the thermal box 1 has a sufficient insulation layer thickness to ensure that the internal power generation module 2 operates normally at high temperature. In one embodiment, the heat box 1 is constructed as a heat insulation cotton structure including a metal box body provided at the outside and heat insulation cotton coated inside the metal box body. The heat preservation cotton structure is suitable for the scene that the generating power is less, and wherein, the metal box can adopt stainless steel box. In another embodiment, the hot box 1 is constructed as a kiln structure. The kiln structure is mainly suitable for the scene of high power generation.
Two specific embodiments are presented below to facilitate an understanding of the stack integration arrangement in the solid oxide fuel cell power generation system described in this disclosure.
Embodiment one:
as shown in fig. 1, the pile-up unit in the solid oxide fuel cell power generation system has a length of 5.5 m, a width of 4 m, and a height of 2.5 m, and has a rated power generation of 96 kw and a rated output voltage of 105 v. The pile-up integrated device in the solid oxide fuel cell power generation system consists of a power generation module array, an anode gas heat exchanger 31, a cathode gas heat exchanger 32, a hot box 1, matched pipelines and conductive pieces. Wherein, the power generation module array includes 4 power generation modules 2, and the arrangement mode is: and 2 rows in the transverse direction and 2 columns in the longitudinal direction form a 2×2 matrix. All the power generation modules 2 share the anode gas heat exchanger 31 and the cathode gas heat exchanger 32. The anode gas heat exchanger 31 and the cathode gas heat exchanger 32 are placed at the tail of the stack integrated device in the solid oxide fuel cell power generation system, the anode gas heat exchanger 31 is placed below, and the cathode gas heat exchanger 32 is placed above.
In the working process, the anode gas firstly rises the temperature of the anode gas through the anode gas heat exchanger 31, then enters an anode gas inlet manifold, and then enters each power generation module 2 through an anode gas inlet pipe 241 of each power generation module 2 to participate in electrochemical reaction. After working, the high-temperature anode tail gas flows out of the anode gas exhaust pipe 251 of each power generation module 2, enters the anode gas outlet header pipe, then enters the anode gas heat exchanger 31, exchanges heat with the low-temperature anode gas just entering the anode gas heat exchanger 31, reduces the temperature of the high-temperature anode tail gas, and finally flows out of the anode gas heat exchanger 31.
The cathode gas firstly rises the temperature thereof through the cathode gas heat exchanger 32, then enters the cathode gas inlet manifold, and then enters each power generation module 2 through the cathode gas inlet pipe 242 of each power generation module 2 to participate in electrochemical reaction. After the operation, the high-temperature cathode tail gas flows out of the cathode gas exhaust pipe 252 of each power generation module 2, enters the cathode gas outlet header pipe, then enters the cathode gas heat exchanger 32, exchanges heat with the low-temperature cathode gas just entering the cathode gas heat exchanger 32, reduces the temperature of the high-temperature cathode tail gas, and finally flows out of the cathode gas heat exchanger 32.
In terms of the circuit, the upper output of the power generation module 2 is the positive electrode. The top of the power generation module 2 is provided with an annular conductive plate, and the annular conductive plate is electrically connected with 8 positive conductive rods 221 at the top of the power generation module 2 to form a positive electrode of the power generation module 2 to the outside. The annular conductive plates of each power generation module 2 are connected by a positive electrode main conductive plate in the shape of a straight plate, and are then output to the outside. The positive electrode main conductive plate forms a 'dry' shape. The lower output of the power generation module 2 is a negative electrode. The negative electrode main conductive plate is electrically connected with the negative electrode plate 231 of each power generation module 2 through a negative electrode conductive rod, and then is output to the outside. The negative electrode main conductive plate also forms a 'dry' shape.
The stack integration device in the solid oxide fuel cell power generation system further includes a heat box 1 provided outside. In operation, the temperature inside the stack integrated device in the solid oxide fuel cell power generation system is up to 750 ℃, and the heat box 1 is used for keeping the temperature inside the stack integrated device in the solid oxide fuel cell power generation system, so that heat dissipation to the outside is reduced. Here, the hot box 1 is 5.5 m long, 4 m wide, 2.5 m high and 200 mm thick. The heat box 1 comprises a shell and a heat insulation material, wherein the heat insulation material is aluminum silicate, and the thickness of the heat insulation material is 190 mm. The outer shell of the hot box 1 is made of carbon steel material and has the thickness of 10 mm. In order to clearly show the internal structure of the stack integration device in the solid oxide fuel cell power generation system, only the bottom plate 11 of the hot box 1 is shown in fig. 1, and the side walls and top of the hot box 1 are not shown.
Embodiment two:
this embodiment describes a stack integration device of a megawatt SOFC power generation system, see fig. 2. The rated output power of the pile-up unit in the solid oxide fuel cell power generation system is 1200 kilowatts and the rated output voltage is 105 volts, and the pile-up unit comprises 50 power generation modules 2, wherein the rated power of each power generation module 2 is 24 kilowatts and the rated output voltage is 105 volts. The stack 211 and the power generation module 2 used in the stack integration device in the solid oxide fuel cell power generation system are the same as the stack 211 and the power generation module 2 used in embodiment 1, and thus a description thereof will not be repeated. The following focuses on the manner in which the power generation module 2 is integrated within the stack integration device in the solid oxide fuel cell power generation system.
The stack integration device in the solid oxide fuel cell power generation system employed in this embodiment is 16 m long, 13 m wide, and 5 m high. As shown in fig. 2, the power generation module array includes 50 power generation modules 2 arranged in such a manner that: transverse 5 rows, longitudinal 5 columns, and higher 2 layers, forming a 5 x 2 three-dimensional matrix. All the power generation modules 2 share the anode gas heat exchanger 31 and the cathode gas heat exchanger 32. An anode gas heat exchanger 31 and a cathode gas heat exchanger 32 are placed at the tail of a stack integration device in the solid oxide fuel cell power generation system. Since the three-dimensional arrangement characteristics are not affected by the anode gas path pipe, the cathode gas path pipe, and the circuit structure in the stack integrated device in the solid oxide fuel cell power generation system, and this embodiment is intended to illustrate the three-dimensional arrangement of the large-scale power generation module integrated device, parts of the anode gas path pipe, the cathode gas path pipe, and the circuit structure are not described in detail in this embodiment.
The hot box 1 in this example is 16 m long, 13 m wide, 5 m high and 400 mm thick. The hot box 1 comprises a housing and a thermal insulation material. The heat insulating material is aluminum silicate with the thickness of 390 mm. The shell of the hot box 1 is made of carbon steel material and has the thickness of 10 mm. For clarity of illustration of the internal structure of the stack integration device in the solid oxide fuel cell power generation system, only the bottom plate 11 and the partition plate 12 of the heat box 1 are shown in fig. 2, and the side walls and the top of the heat box 1 are not shown.
In addition, since the operation flow of the stack integration device in the solid oxide fuel cell power generation system in this embodiment is exactly the same as that in embodiment 1, a detailed description thereof will be omitted.
The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations are not described further in this disclosure in order to avoid unnecessary repetition.
Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.
Claims (15)
1. A stack integration device in a solid oxide fuel cell power generation system, characterized by comprising a hot box, a plurality of power generation modules, a reaction gas heat exchanger and a main conductor, wherein the reaction gas heat exchanger is used for exchanging heat between reaction gas supplied to each power generation module and high-temperature tail gas discharged from each power generation module;
the power generation modules are arranged in the hot box and are respectively used for enabling the reactant gases to undergo electrochemical reaction to generate electric energy, and each power generation module is electrically connected with the main conductive piece so that the generated electric energy is collected and output through the main conductive piece;
wherein the hot box is used for maintaining the temperature environment required by the electrochemical reaction of each power generation module.
2. The stack integration device in a solid oxide fuel cell power generation system of claim 1, wherein each of the power generation modules includes at least one stack inside.
3. The stack integration device in a solid oxide fuel cell power generation system according to claim 2, wherein a plurality of the stacks are connected in series or in parallel.
4. The stack integration device in a solid oxide fuel cell power generation system according to claim 2, wherein a plurality of the stacks are arranged in a stack in a vertical direction to form a stack tower.
5. The stack integration device in a solid oxide fuel cell power generation system according to claim 4, wherein the number of the stack towers in each of the power generation modules is equal to or less than 12, and the number of the stacks in each of the stack towers is equal to or less than 10.
6. The stack integration in a solid oxide fuel cell power generation system of claim 5, wherein a plurality of the stack towers are arranged in a ring around the center of the power generation module.
7. The stack integration device in a solid oxide fuel cell power generation system according to any one of claims 1 to 6, wherein the hot box includes a bottom plate on which a plurality of the power generation modules are arranged; or alternatively, the process may be performed,
the hot box comprises a bottom plate and at least one partition plate which is arranged at intervals with the bottom plate along the vertical direction, and a plurality of power generation modules are respectively arranged on the bottom plate and the partition plate.
8. The stack integration device in a solid oxide fuel cell power generation system according to claim 7, wherein a plurality of the power generation modules are arranged in a linear, rectangular, square or annular manner on the bottom plate and/or the separator.
9. The stack integration in a solid oxide fuel cell power generation system of claim 1, wherein the reactant gas heat exchanger comprises a preheater and a regenerator, a plurality of the power generation modules configured as one or more shared preheaters and regenerators.
10. The electric pile integration device in a solid oxide fuel cell power generation system according to claim 1, wherein the power generation module comprises a plurality of pile towers which are annularly arranged, a first conductive member is arranged at the top of each pile tower, a second conductive member is arranged at the bottom of each pile tower, a reaction gas inlet which is communicated with the reaction gas heat exchanger is further arranged on each pile tower and is used for conveying heated reaction gas into each pile tower, and a reaction gas outlet which is communicated with the reaction gas heat exchanger and is used for conveying high-temperature tail gas in each pile tower into the reaction gas heat exchanger so as to enable the high-temperature tail gas to be in heat exchange with reaction gas to be heated;
the reactor towers are used for enabling the reactant gases to perform electrochemical reaction to generate electric energy, and the electric energy generated by each reactor tower is collected to the main conductive piece through the first conductive piece and the second conductive piece and is output through the main conductive piece.
11. The stack integration device in a solid oxide fuel cell power generation system according to claim 1, wherein the reaction gas heat exchanger includes an anode gas heat exchanger for heat exchanging anode gas supplied to each of the power generation modules and high-temperature anode off-gas discharged from each of the power generation modules;
the cathode gas heat exchanger is used for carrying out heat exchange on cathode gas supplied to each power generation module and high-temperature cathode tail gas discharged from each power generation module;
the power generation module is used for enabling anode gas and cathode gas to electrochemically react to generate electric energy.
12. The stack integration device in a solid oxide fuel cell power generation system according to claim 11, wherein the main conductive member includes a positive electrode conductive member and a negative electrode conductive member, and the electric power generated in each of the power generation modules is collected and outputted through the positive electrode conductive member and the negative electrode conductive member.
13. The stack integration device in a solid oxide fuel cell power generation system according to claim 12, wherein the power generation module includes a negative plate, a plurality of stack towers disposed on the negative plate and arranged in a ring shape, a positive electrode conductive rod disposed at a top of the stack towers, an anode gas intake pipe communicating with the plurality of stack towers, an anode gas exhaust pipe communicating with the anode gas heat exchanger for conveying heated anode gas into each of the stack towers, a cathode gas intake pipe, and a cathode gas exhaust pipe; the anode gas exhaust pipe is also communicated with the anode gas heat exchanger and is used for conveying high-temperature anode tail gas in each pile tower to the anode gas heat exchanger; the cathode gas inlet pipe is communicated with the cathode gas heat exchanger and is used for conveying the heated cathode gas to each pile tower; the cathode gas exhaust pipe is also communicated with the cathode gas heat exchanger and is used for conveying the high-temperature cathode tail gas in each pile tower to the cathode gas heat exchanger;
the electric energy generated by the electrochemical reaction in each pile tower is collected to the positive electrode conductive piece through the positive electrode conductive rod, is collected to the negative electrode conductive piece through the negative electrode plate, and is output through the positive electrode conductive piece and the negative electrode conductive piece.
14. The stack integration device in a solid oxide fuel cell power generation system according to claim 1, wherein the hot box is constructed as a heat insulating cotton structure including a metal box body provided at the outside and heat insulating cotton coated inside the metal box body.
15. The stack integration in a solid oxide fuel cell power generation system of claim 1, wherein the hot box is configured as a kiln structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210384003.4A CN116960393A (en) | 2022-04-12 | 2022-04-12 | Pile-up integrated device in solid oxide fuel cell power generation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210384003.4A CN116960393A (en) | 2022-04-12 | 2022-04-12 | Pile-up integrated device in solid oxide fuel cell power generation system |
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| CN202210384003.4A Pending CN116960393A (en) | 2022-04-12 | 2022-04-12 | Pile-up integrated device in solid oxide fuel cell power generation system |
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