Search

CN-117383515-B - Reformer and fuel cell

CN117383515BCN 117383515 BCN117383515 BCN 117383515BCN-117383515-B

Abstract

The invention belongs to the technical field of fuel cells, and discloses a reformer and a fuel cell, wherein the reformer comprises a reforming unit, the reforming unit is provided with an inner cavity, a partition plate divides the inner cavity into a fuel gas cavity and a heat exchange air cavity, the heat exchange air cavity is used for heat exchange gas to enter, the partition plate is made of heat conducting materials, the reforming unit is provided with a first end and a second end along a first direction, the fuel gas cavity comprises a first transition cavity, a reforming cavity positioned at one side of the first partition strip and a fuel gas heat exchange cavity positioned at the other side of the first partition strip, the reforming cavity and the fuel gas heat exchange cavity are communicated only through the first transition cavity, the reforming cavity is provided with a fuel gas inlet, the fuel gas heat exchange cavity is provided with a fuel gas outlet, a catalyst for reforming fuel gas is arranged in the reforming cavity, the first transition cavity is positioned at the first end, and the fuel gas inlet and the fuel gas outlet are both positioned at the second end, and the same size or specification of the reformer can increase the path length of a fuel gas flow channel, so that the heat exchange effect of fuel gas is improved.

Inventors

  • WANG BIN
  • SHEN XUESONG
  • WANG XIAOYANG

Assignees

  • 山东国创燃料电池技术创新中心有限公司

Dates

Publication Date
20260505
Application Date
20231027

Claims (9)

  1. 1. A reformer for reforming a fuel gas in a fuel cell, characterized by comprising a reforming unit (1), the reforming unit (1) having an inner cavity (100) and comprising a partition plate (2) arranged in the inner cavity (100) and a first partition strip (3), the partition plate (2) dividing the inner cavity (100) into a fuel gas chamber (110) and a heat exchanging air chamber (120), the heat exchanging air chamber (120) being for exchanging heat gas entering, the partition plate (2) being made of a heat conducting material, the reforming unit (1) having a first end and a second end in a first direction; The gas chamber (110) comprises a first transition chamber (112), a reforming chamber (111) positioned at one side of the first separation strip (3) and a gas heat exchange chamber (113) positioned at the other side of the first separation strip (3), wherein the reforming chamber (111) and the gas heat exchange chamber (113) are communicated only through the first transition chamber (112), the reforming chamber (111) is provided with a gas inlet, the gas heat exchange chamber (113) is provided with a gas outlet, a catalyst for reforming gas is arranged in the reforming chamber (111), the first transition chamber (112) is positioned at the first end, and the gas inlet and the gas outlet are both positioned at the second end; the reforming unit (1) further comprises a second separation strip (4), the heat exchange air cavity (120) comprises a second transition cavity (122), a first heat exchange cavity (121) arranged on one side of the second separation strip (4) and a second heat exchange cavity (123) arranged on the other side of the second separation strip (4), the reforming cavity (111) is opposite to the first heat exchange cavity (121), the fuel gas heat exchange cavity (113) is opposite to the second heat exchange cavity (123), the first heat exchange cavity (121) and the second heat exchange cavity (123) are communicated only through the second transition cavity (122), the first heat exchange cavity (121) is provided with a heat exchange gas inlet, the second heat exchange cavity (123) is provided with a heat exchange gas outlet, the second transition cavity (122) is arranged at the second end, and the heat exchange gas inlet and the heat exchange gas outlet are both arranged at the first end.
  2. 2. The reformer of claim 1, wherein the heat exchange gas into and out of the heat exchange gas chamber (120) is air, the heat exchange gas chamber (120) being in communication with an air inlet of the stack.
  3. 3. Reformer according to claim 1 or 2, characterized in that it further comprises a first fin (5) arranged in the reforming chamber (111) and a second fin (6) arranged in the gas heat exchange chamber (113), the first fin (5) dividing the reforming chamber (111) into a plurality of reforming channels, the extending directions of the reforming channels being all parallel to the first direction, the second fin (6) dividing the gas heat exchange chamber (113) into a plurality of gas heat exchange channels, the extending directions of the gas heat exchange channels being all parallel to the first direction, the first fin (5) and the second fin (6) both being in contact with the separator (2) and being both made of a heat conducting material.
  4. 4. The reformer of claim 3, wherein the reforming flow path has a rectangular, isosceles trapezoid or Ω -shaped cross section, and the gas heat exchange flow path has a rectangular, isosceles trapezoid or Ω -shaped cross section.
  5. 5. Reformer according to claim 1 or 2, characterized in that the width of the reforming chamber (111) in the second direction is larger than the width of the gas heat exchange chamber (113) in the second direction, the second direction being parallel to the separator (2) and the second direction being perpendicular to the first direction.
  6. 6. Reformer according to claim 1 or 2, characterized in that the reforming unit (1) is provided in plurality, a plurality of the reforming units (1) being stacked in sequence.
  7. 7. Reformer according to claim 1 or 2, characterized in that the side of the first transition chamber (112) remote from the first dividing strip (3) has a first side wall, a second side wall and a third side wall connected in sequence, the first side wall being connected to the side wall of the reforming chamber (111), the third side wall being connected to the side wall of the gas heat exchange chamber (113), the second side wall being arc-shaped.
  8. 8. A fuel cell comprising a reformer as claimed in any one of claims 1 to 7, and further comprising a stack, the fuel gas outlet of the reformer being in communication with the reactant gas inlet of the stack.
  9. 9. The fuel cell according to claim 8, wherein the heat exchange gas flowing into and out of the heat exchange gas chamber (120) is air, the heat exchange gas chamber (120) being in communication with the air inlet of the stack, the fuel cell further comprising an air preheater located upstream of the reformer in the flow direction of the air and for heating the air.

Description

Reformer and fuel cell Technical Field The present invention relates to the technical field of fuel cells, and in particular, to a reformer and a fuel cell. Background In the solid oxide fuel cell system, hydrocarbon gases such as methane, biogas, methanol, ethanol and the like can be used as fuel of the fuel cell except for the conventional hydrogen, however, other hydrocarbon fuels except for the hydrogen and the carbon monoxide are subjected to catalytic reforming before being supplied to the electric pile. In a reformer in which fuel gas is heated and catalyzed, for example, a reformer provided with a gas flow passage for the fuel gas to pass therethrough and a heat supply passage for the high temperature flue gas of a solid oxide fuel cell, the fuel gas is reformed in the gas flow passage and heated by the high temperature flue gas is provided in the related art. However, there are problems in that the reformer is not excessively large in size due to the installation space of the fuel cell system, and thus the flow path of the fuel gas is generally short, which easily results in incomplete heat exchange and uneven heat exchange. Disclosure of Invention According to one aspect of the present invention, the present invention provides a reformer to solve the problems of incomplete heat exchange and uneven heat exchange caused by the generally short gas flow path of the fuel gas in the prior art. In order to achieve the above purpose, the invention adopts the following technical scheme: The fuel cell comprises a fuel cell body, a reformer, a first separator and a second separator, wherein the reformer is used for reforming fuel gas in the fuel cell, the reforming unit is provided with an inner cavity and comprises a separator arranged in the inner cavity and a first separator strip, the separator separates the inner cavity into a fuel gas cavity and a heat exchange gas cavity, the heat exchange gas cavity is used for exchanging heat gas, the separator is made of a heat conducting material, and the reforming unit is provided with a first end and a second end along a first direction; The gas chamber includes first transition chamber, is located reforming chamber and being located of first dividing strip one side first dividing strip opposite side gas heat transfer chamber, reforming chamber with gas heat transfer chamber is only passed through first transition chamber intercommunication, reforming chamber has the gas entry, gas heat transfer chamber has the gas export, be provided with the catalyst that is used for reformed gas in the reforming chamber, first transition chamber is located first end, gas entry and gas export all are located the second end. As the preferred scheme of reformer, the reforming unit still includes the second parting bead, the heat transfer air cavity includes second transition chamber, is located the first heat transfer chamber of second parting bead one side and be located the second heat transfer chamber of second parting bead opposite side, the reforming chamber just is just to first heat transfer chamber setting, the gas heat transfer chamber just is just to second heat transfer chamber setting, first heat transfer chamber and second heat transfer chamber only pass through the second transition chamber intercommunication, first heat transfer chamber has the heat transfer gas entry, the second heat transfer chamber has the heat transfer gas export, the second transition chamber is located the second end, heat transfer gas entry and the heat transfer gas export all are located first end. As the preferable scheme of the reformer, the heat exchange gas entering and exiting the heat exchange air cavity is air, and the heat exchange air cavity is communicated with an air inlet of the electric pile. As the preferred scheme of reformer, still including set up in the first fin of reforming chamber and set up in the second fin of gas heat transfer chamber, first fin will the reforming chamber is divided into a plurality of reforming runner, and a plurality of the extending direction of reforming runner all is on a parallel with first direction, the second fin will gas heat transfer chamber is divided into a plurality of gas heat transfer runner, and a plurality of the extending direction of gas heat transfer runner all is on a parallel with first direction, first fin with the second fin all with the baffle contacts, and is made by the heat conduction material. As the preferable scheme of the reformer, the section of the reforming flow channel is rectangular, isosceles trapezoid or omega-shaped, and the section of the fuel gas heat exchange flow channel is rectangular, isosceles trapezoid or omega-shaped. As a preferable mode of the reformer, the width of the reforming chamber in the second direction is larger than the width of the gas heat exchange chamber in the second direction, the second direction is parallel to the partition plate, and the second direction is perpendicular to the f