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JP-7855807-B1 - Hydrogen generator

JP7855807B1JP 7855807 B1JP7855807 B1JP 7855807B1JP-7855807-B1

Abstract

[Problem] Improve the controllability of hydrogen generation. [Solution] The hydrogen generating device comprises a hydrogen generating material 40 containing a solid hydrogen storage material and having a predetermined amount, a strip-shaped member 41 that encloses and holds a large number of hydrogen generating materials at predetermined intervals and is permeable to liquid, a moving mechanism for moving the strip-shaped member in the longitudinal direction, a reaction liquid supply valve 16 that supplies a reaction liquid 18 that chemically reacts with the hydrogen storage material to generate hydrogen to the hydrogen generating material held in the strip-shaped member, and a control unit configured to control the amount of reaction liquid supplied per unit time from the reaction liquid supply valve. The strip-shaped member is constructed by fixing a lower strip 44 and an upper strip 45 to each other, with the hydrogen generating material sandwiched and held between the lower and upper strips, the upper strip being permeable to liquid, the reaction liquid supply valve drips the reaction liquid from above onto the upper strip covering the hydrogen generating material to which the reaction liquid is to be supplied, the lower strip is impermeable to liquid, and the dripped reaction liquid can remain on the lower strip. [Selection Diagram] Figure 6

Inventors

  • 濱中 好久

Assignees

  • 株式会社IJTT

Dates

Publication Date
20260508
Application Date
20260109

Claims (13)

  1. A hydrogen generating material containing a solid hydrogen storage material and having a predetermined amount thereof, A strip-shaped member that encloses and holds a large number of the hydrogen generating materials at predetermined intervals, and is permeable to liquid, A moving mechanism for moving the strip-shaped member in its longitudinal direction, A reaction liquid supply valve supplies a reaction liquid that chemically reacts with a hydrogen storage material to generate hydrogen to the hydrogen generating material held in the strip-shaped member, A control unit configured to control the amount of reaction liquid supplied per unit time from the reaction liquid supply valve, Equipped with, The aforementioned strip-shaped member is constructed by fixing a lower strip material and an upper strip material together, and the hydrogen generating material is sandwiched and held between the lower strip material and the upper strip material. The upper band material is permeable to liquid, and the reaction liquid supply valve drops the reaction liquid onto the upper band material covering the hydrogen generating material to which the reaction liquid is supplied, from above. The hydrogen generator is characterized in that the lower band material is impermeable to liquid, and the reaction solution dropped onto it can remain on the lower band material.
  2. A housing that accommodates the strip-shaped member, the moving mechanism, and the reaction liquid supply valve, A pressure sensor for detecting the pressure of hydrogen inside the housing, Equipped with, The hydrogen generator according to claim 1, wherein the control unit controls the reaction liquid supply valve based on the detected pressure detected by the pressure sensor.
  3. The hydrogen generating apparatus according to claim 1, wherein a plurality of reaction liquid supply valves are provided, and each reaction liquid supply valve supplies a reaction liquid to the hydrogen generating material arranged in correspondence with each reaction liquid supply valve.
  4. The hydrogen generator according to claim 3, wherein the control unit controls a plurality of reaction liquid supply valves in the same manner.
  5. The hydrogen generator according to claim 3, wherein the control unit controls a plurality of reaction liquid supply valves in different ways.
  6. The hydrogen generating device according to claim 3, wherein the hydrogen generating material is arranged to correspond to only some of the reaction liquid supply valves among the plurality of reaction liquid supply valves.
  7. The strip-shaped member is provided with movement position detection marks at predetermined intervals, A mark detector for detecting the aforementioned mark, A hydrogen generator according to claim 1, comprising:
  8. A recovery tank for recovering and storing the reaction solution after it has been used in the reaction with hydrogen storage materials, A leak prevention mechanism to prevent leakage due to backflow from the aforementioned recovery tank, A hydrogen generator according to claim 1, comprising:
  9. The hydrogen generator according to claim 8, wherein the leakage prevention mechanism includes a shut-off valve provided at the inlet of the recovery tank.
  10. The hydrogen generator according to claim 8, wherein the leak prevention mechanism includes a water-absorbing material provided around the inlet of the recovery tank.
  11. A recovery tank for recovering and storing the reaction solution after it has been used in the reaction with hydrogen storage materials, A reflux device for refluxing the reaction liquid stored in the recovery tank to the reaction liquid supply valve, A hydrogen generator according to claim 1, comprising:
  12. The hydrogen generator according to claim 2, wherein the control unit is configured to diagnose whether the hydrogen generator is functioning normally based on the detected pressure detected by the pressure sensor and the amount of reaction liquid supplied from the reaction liquid supply valve.
  13. A hydrogen generator according to claim 1, A fuel cell stack that generates electricity by receiving hydrogen supplied by the hydrogen generator, A hydrogen power generation device characterized by being equipped with the following features.

Description

This disclosure relates to a hydrogen generator. One known method for combating global warming is the use of fuel cells. A fuel cell is a device that generates electricity through a chemical reaction between naturally occurring hydrogen and oxygen. By using fuel cells, electricity can be generated without relying on fossil fuels, thereby reducing carbon dioxide emissions, a major cause of global warming. In practice, electricity is generated by supplying hydrogen produced by a hydrogen generator to a fuel cell stack. Japanese Patent Publication No. 2024-106035 This is a schematic front view showing a hydrogen power generation device according to the first embodiment.This is a schematic front view showing the configuration of a hydrogen power generation device and its output side.This is a schematic perspective view showing a hydrogen generator.This is a schematic plan view (section IV-IV in Figure 1) showing the hydrogen generation device.This is a magnified perspective view showing the area around the reaction solution supply section.This is a cross-sectional view showing a magnified view of the area around the reaction solution supply section.This shows the joint between the housing body and the lid, and is an enlarged view of section VII in Figure 4.This is a schematic front view showing a magnified view of the pressure regulating device.This is a flowchart relating to the control of the reaction liquid supply valve.This is a flowchart for controlling actuators.This is a time chart that schematically shows the changes in the second detection pressure.This is a schematic front view showing a hydrogen generator of a first modified example of the first embodiment.This is a schematic front view showing a hydrogen power generation device of a second modified example of the first embodiment.This is a schematic perspective view showing a hydrogen generator of a second modified example of the first embodiment.This is a schematic plan view (XV-XV section in Figure 13) showing a hydrogen generator of a second modified example of the first embodiment.This is a schematic front view showing a hydrogen generator of a third modified example of the first embodiment.This graph shows the relationship between the operating time of the hydrogen generator and the pH value of the recovered liquid.This is a schematic front view showing a hydrogen power generation device according to the second embodiment.This is a schematic front view showing a hydrogen generator of the first modified example of the second embodiment.This is a schematic front view showing a hydrogen generator of a second modified example of the second embodiment.This is a schematic front view showing a hydrogen generator of a third modified example of the second embodiment.This is a schematic front view showing a hydrogen generator of a fourth modified example of the second embodiment.This is a schematic front view showing a hydrogen power generation device of a sixth modified example of the second embodiment. The embodiments of this disclosure will be described below with reference to the attached drawings. Please note that this disclosure is not limited to the embodiments described below. [First Embodiment] Figure 1 is a schematic front view showing a hydrogen power generation system to which the hydrogen generator of the first embodiment is applied. For convenience, the front, back, left, right, up, and down directions are defined as shown in the figure. The hydrogen power generation system 100 comprises, in order from the upstream side in the direction of hydrogen flow, a hydrogen generator 1, a chamber tank 2, a pressure regulator 3, and a fuel cell (hereinafter also referred to as FC) stack 4. These are connected by first to third pipes 5, 6, and 7, respectively. The hydrogen generator 1 has a housing 32 that serves as a reaction vessel or pressure vessel. A chemical reaction for hydrogen generation takes place inside this housing 32. The housing 32 is equipped with a pressure sensor, specifically a first pressure sensor 8, for detecting the internal pressure. A moisture filter 9 and a check valve 10 are provided in the second piping 6 connecting the chamber 2 and the pressure regulating device 3. Another pressure sensor, specifically a second pressure sensor 11, and a flow sensor 12 are provided in the third piping 7 connecting the pressure regulating device 3 and the FC stack 4. These components are housed within the casing 33 of the hydrogen generator 1. In this embodiment, the casing 33 is rectangular in shape, and its interior is divided into three vertical sections by two partition walls 34 and 35. The hydrogen generator 1 is housed in the lower chamber R1, and the components from the chamber tank 2 to the FC stack 4 are housed in the middle chamber R2. The upper chamber R3 houses an electronic control unit (ECU) 50, which is responsible for the electrical control of the hydrogen generator 1 and other components. Each chamber R1 to R3 is airtight a