Evaporator for solid oxide fuel cell
By designing a heat-conducting perforated plate and a water-addition mechanism in the solid oxide fuel cell evaporator, the problem of unstable gas supply caused by the need for additional electric heating in the external evaporator was solved, and the stability of internal gas pressure and water vapor supply was achieved, ensuring the normal operation of the fuel cell stack.
Patent Information
- Application Number
- CN202423046220.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-11
AI Technical Summary
Existing solid oxide fuel cells have externally mounted evaporators that require additional electric heating, leading to unstable gas supply and affecting the normal operation of the fuel cell stack.
An evaporator including a shell and a water supply mechanism was designed. The shell is equipped with a heat-conducting perforated plate and a water supply mechanism. Water is pumped into the evaporator by a water pump and evaporates on the heat-conducting perforated plate to form a stable supply of water vapor. The heat-conducting perforated plate is used to increase the heating area to ensure stable gas pressure.
This achieves stability of the internal gas pressure of the evaporator and the supply of steam, avoiding the impact of unstable gas pressure on the fuel cell stack and improving the reliability of the gas supply.
Smart Images
Figure CN223683039U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to solid oxide fuel cell technical field, specifically a kind of evaporator for solid oxide fuel cell. BACKGROUND
[0002] Solid oxide fuel cell is abbreviated as SOFC, SOFC system has highly integrated interior, and its interior includes stack, heat exchanger, reformer, combustor, desulfurizer, evaporator and other components, since stack anode and reformer need natural gas and water vapor to carry out reaction, with reaction, produce hydrogen, carbon monoxide and other electrochemical process required medium. Since stack has low pressure, smaller pressure fluctuation and other requirements, thus have higher requirements to evaporator, current evaporator is generally external to SOFC system, and need additional electricity to heat water, thus produce water vapor, with unstable gas supply defects, adversely affect the normal work of stack. SUMMARY
[0003] To solve the above technical problems, the utility model provides a kind of evaporator for solid oxide fuel cell.
[0004] The technical scheme of the utility model is as follows: a kind of evaporator for solid oxide fuel cell including shell and water adding mechanism, the side of shell is equipped with water adding mechanism, the inside of shell is equipped with multiple heat-conducting hole plates in height direction;Water adding mechanism includes water pump and inlet pipe, inlet pipe includes horizontal section and vertical section;The one end of horizontal section is communicated with water pump, the other end is inserted into shell and is communicated with the upper portion of vertical section, and the lower portion of vertical section is directed to the lower portion of shell and is equipped with multiple through holes in length direction.
[0005] Further, shell includes high-temperature shell and low-temperature shell;High-temperature shell is located above low-temperature shell;The top of high-temperature shell is equipped with steam outlet, and the bottom of low-temperature shell is equipped with three-way pipe.
[0006] Further, heat-conducting hole plate includes first heat-conducting hole plate and second heat-conducting hole plate;First heat-conducting hole plate is equipped in high-temperature shell, and second heat-conducting hole plate is equipped in low-temperature shell;From the direction of low-temperature shell to high-temperature shell, the spacing of heat-conducting hole plate becomes smaller.
[0007] Further, high-temperature shell and low-temperature shell are detachably connected by first flange, and high-temperature gasket is arranged between high-temperature shell and low-temperature shell.
[0008] Further, the top end of three-way pipe is communicated with the bottom of low-temperature shell, the bottom end is communicated with the outside, and one end of side face is used for nitrogen inlet.
[0009] Further, the side of shell is equipped with inlet pipe, and horizontal section enters shell through inlet pipe;The end of inlet pipe away from shell is equipped with end cover.
[0010] Further, the sealing gasket is arranged between the inlet pipe and the end cover, and is fixedly connected through the second flange.
[0011] Compared with the prior art, the water body is directly accumulated in the lower part of the shell through the water inlet pipe, so that the water body is prevented from suddenly vaporizing to form unstable air pressure after entering the shell. The vertical section is provided with a plurality of through holes, so that the air pressure in the shell is kept stable. The heat-conducting hole plate increases the heating area of the water body and ensures stable water vapor supply. BRIEF DESCRIPTION OF DRAWINGS
[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0013] Fig. 1 It is a cross-sectional schematic view of the whole of the present application;
[0014] Fig. 2 It is a schematic view of the water adding mechanism of the present application.
[0015] 1, shell; 2, water adding mechanism; 11, high-temperature shell; 12, low-temperature shell; 13, first flange; 131, high-temperature gasket; 14, inlet pipe; 111, steam outlet; 112, first heat-conducting hole plate; 121, three-way pipe; 122, second heat-conducting hole plate; 141, cover plate; 21, water pump; 22, water inlet pipe; 221, through hole. DETAILED DESCRIPTION
[0016] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described clearly and completely. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.
[0017] The specific embodiments of the present application will be described below in combination with the drawings:
[0018] As Figs. 1-2As shown, a kind of evaporator for solid oxide fuel cell includes shell 1 and water adding mechanism 2, and the side of shell 1 is provided with water adding mechanism 2, and the inside of shell 1 is provided with multiple heat-conducting hole plates in height direction.Water body is pumped into shell 1 by water adding mechanism 2, and water body is vaporized to form water vapor in shell 1.Heat-conducting hole plate increases the heating area of water body, improves the efficiency of shell 1 to heat water body, and guarantees the stability of shell 1 to supply gas.
[0019] Shell 1 includes high-temperature shell 11 and low-temperature shell 12.High-temperature shell 11 is arranged above low-temperature shell 12.High-temperature shell 11 is detachably connected with low-temperature shell 12 through first flange 13, and high-temperature gasket 131 is arranged between high-temperature shell 11 and low-temperature shell 12.Detachable high-temperature shell 11 and low-temperature shell 12 facilitate maintenance or replacement of components inside shell 1.High-temperature gasket 131 can improve the sealing property of assembly of high-temperature shell 11 and low-temperature shell 12, and simultaneously avoid the effect of heat conduction to make heat of high-temperature shell 11 transferred to low-temperature shell 12.
[0020] Heat-conducting hole plate includes first heat-conducting hole plate 112 and second heat-conducting hole plate 122.First heat-conducting hole plate 112 is arranged in high-temperature shell 11, and second heat-conducting hole plate 122 is arranged in low-temperature shell 12.The spacing of heat-conducting hole plate becomes smaller from low-temperature shell 12 to high-temperature shell 11.The closer to the position of steam outlet 111, the greater the density of heat-conducting hole plate, so that water body can be fully evaporated.
[0021] The top of high-temperature shell 11 is provided with steam outlet 111, and the bottom of low-temperature shell 12 is provided with three-way pipe 121.The outer surface of low-temperature shell 12 is provided with thermal insulation cotton.The inside of low-temperature shell 12 is kept in a lower temperature range through thermal insulation cotton, so that low-temperature shell 12 can preheat water body without causing water body to boil and vaporize.The top end of three-way pipe 121 is communicated with the bottom of low-temperature shell 12, the bottom end is communicated with the outside, and one end of the side surface is used to pass nitrogen.SOFC system stops, and if water body remains in shell 1, the accumulated water can be discharged through three-way pipe 121.Before using the steam generator, nitrogen is passed to purge the inside of shell 1, create inert environment, reduce the contact of equipment and oxygen in air, so as to slow down the corrosion speed of equipment and prolong the service life of equipment.
[0022] Water adding mechanism 2 includes water pump 21 and water inlet pipe 22, and water inlet pipe 22 includes horizontal section and vertical section.The one end of horizontal section is communicated with water pump 21, the other end extends into shell 1 and is communicated with the upper part of vertical section, the lower part of vertical section extends to the lower part of shell 1 and is provided with multiple through holes 221 in length direction.The side surface of shell 1 is provided with inlet pipe 14, and horizontal section passes through inlet pipe 14 to enter shell 1.The end of inlet pipe 14 away from shell 1 is provided with end cover.Sealing gasket is arranged between inlet pipe 14 and end cover, and is fixedly connected through second flange, and end cover can prevent the gas in shell 1 from leaking out.
[0023] The working principle of the specific embodiment of the utility model is that the water pump 21 pumps water into the water inlet pipe 22, the water enters the low-temperature shell 12 for preheating along the water inlet pipe 22, the water increases the heated area through the heat-conducting hole plate in the shell 1, the water is fully evaporated into a gaseous state, and finally is discharged from the steam outlet 111 pipe for use of the SOFC system.
[0024] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. As used herein, the terms "on", "above", "under", "below", "left", "right", "front", "rear", and the like are used for explanation purposes only.
[0025] The above description is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the present application, and any equivalent embodiments with equivalent changes are also included. Any modification, change, equivalent change and modification of the above embodiments, which does not depart from the technical solution of the present application, is still within the scope of the present application.
Claims
1. A vaporizer for solid oxide fuel cells, characterized by: The utility model provides a water adding mechanism and shell, the shell (1) one side is equipped with water adding mechanism (2), the inside of shell (1) is equipped with a plurality of heat conduction hole plates in the height direction, water adding mechanism (2) includes water pump (21) and water inlet pipe (22), the water inlet pipe (22) includes horizontal section and vertical section, one end of horizontal section communicates with water pump (21), the other end extends into shell (1) and communicates with the upper portion of vertical section, and the lower portion of vertical section extends to the lower portion of shell (1) and is equipped with a plurality of through holes (221) in the length direction.
2. The evaporator for a solid oxide fuel cell according to claim 1, characterized by: The shell (1) includes high temperature shell (11) and low temperature shell (12), the high temperature shell (11) is arranged above the low temperature shell (12), the top of high temperature shell (11) is equipped with steam outlet (111), and the bottom of low temperature shell (12) is equipped with three-way pipe (121).
3. The evaporator for a solid oxide fuel cell according to claim 2, characterized by: The heat conduction hole plate includes first heat conduction hole plate (112) and second heat conduction hole plate (122), the first heat conduction hole plate (112) is arranged in the high temperature shell (11), and the second heat conduction hole plate (122) is arranged in the low temperature shell (12), and the interval of heat conduction hole plate becomes smaller from the low temperature shell (12) to the high temperature shell (11).
4. The evaporator for a solid oxide fuel cell according to claim 2, characterized by: The high temperature shell (11) is detachably connected with the low temperature shell (12) through the first flange (13), and the high temperature gasket (131) is arranged between the high temperature shell (11) and the low temperature shell (12).
5. The evaporator for a solid oxide fuel cell according to claim 2, characterized by: The top end of the three-way pipe (121) communicates with the bottom of the low temperature shell (12), the bottom end communicates with the outside, and one end of the side surface is used for passing nitrogen.
6. The evaporator for a solid oxide fuel cell according to claim 1, characterized by: The side surface of the shell (1) is equipped with the inlet pipe (14), and the horizontal section passes through the inlet pipe (14) and enters the shell (1), and the end, away from the shell (1), of the inlet pipe (14) is equipped with an end cover.
7. The evaporator for a solid oxide fuel cell according to claim 6, characterized by: The sealing gasket is arranged between the inlet pipe (14) and the end cover and is fixedly connected through the second flange.