Hydrogen production system

Patent metadata

Field	Value
Publication number	US-2021262100-A1
Application number	US-201917272835-A
Country	US
Kind code	A1
Filing date	Aug 21, 2019
Priority date	Sep 7, 2018
Publication date	Aug 26, 2021
Grant date	—

Abstract

A hydrogen production system includes: a hydrogen production device connected to an electric power system and configured to produce hydrogen by electrolyzing pure water; an output control unit capable of controlling an amount of power supplied from the electric power system to the hydrogen production device according to request from the electric power system; a first pure water line for supplying pure water to the hydrogen production device; a first adjustment device capable of adjusting an amount of pure water supplied to the hydrogen production device via the first pure water line; and a first control unit configured to control the first adjustment device, based on a power amount signal indicating information on an amount of power supplied from the electric power system to the hydrogen production device.

First claim

1 . A hydrogen production system, comprising:
a hydrogen production device connected to an electric power system and configured to produce hydrogen by electrolyzing pure water; an output control unit capable of controlling an amount of power supplied from the electric power system to the hydrogen production device according to request from the electric power system; a first pure water line for supplying pure water to the hydrogen production device; a first adjustment device capable of adjusting an amount of pure water supplied to the hydrogen production device via the first pure water line; and a first control unit configured to control the first adjustment device, based on a power amount signal indicating information on an amount of power supplied from the electric power system to the hydrogen production device.

2 . The hydrogen production system according to claim 1 , further comprising a power meter for measuring an amount of power supplied from the electric power system to the hydrogen production device,
wherein the power amount signal is an output signal of the power meter, and wherein the first control unit is configured to control the first adjustment device based on the output signal of the power meter.

3 . The hydrogen production system according to claim 1 ,
wherein the power amount signal is a control signal by which the output control unit controls an amount of power supplied to the hydrogen production device, and wherein the first control unit is configured to control the first adjustment device based on the control signal of the output control unit.

4 . The hydrogen production system according to claim 1 ,
wherein the first pure water line is connected to a second pure water line for supplying pure water to a steam cycle including a boiler and a steam turbine driven by steam of the boiler at a position downstream of the steam turbine and upstream of the boiler.

5 . The hydrogen production system according to claim 4 , further comprising a hydrogen line for supplying hydrogen produced by the hydrogen production device to the boiler.

6 . The hydrogen production system according to claim 5 , further comprising a hydrogen storage device for storing hydrogen produced by the hydrogen production device,
wherein a generator driven by the steam turbine is connected to the electric power system.

7 . The hydrogen production system according to claim 4 , further comprising:
a pure water production device configured to produce pure water by removing an impurity from raw water to supply pure water to the second pure water line; and a pure water tank for storing pure water produced by the pure water production device, the pure water tank being disposed upstream of a connection position between the second pure water line and the first pure water line and downstream of the pure water production device.

8 . The hydrogen production system according to claim 4 , further comprising:
a second adjustment device capable of adjusting an amount of pure water supplied to the boiler via the second pure water line; and a second control unit configured to control the second adjustment device, based on a first signal indicating information on an amount of pure water supplied from the first pure water line to the hydrogen production device.

9 . The hydrogen production system according to claim 8 ,
wherein the second control unit is configured to be able to execute a limit mode which limits an amount of pure water supplied from the second pure water line to the boiler such that supply of pure water to the hydrogen production device is prioritized over supply of pure water to the steam cycle.

10 . The hydrogen production system according to claim 9 ,
wherein, in the limit mode, the second control unit is configured to limit a period for supplying pure water to the steam cycle to a period during which supply of pure water to the hydrogen production device is stopped or to a period during which an amount of pure water supplied to the hydrogen production device is equal to or less than a reference amount.

11 . The hydrogen production system according to claim 9 or 10 claim 9 , further comprising:
a pure water tank for storing pure water produced by a pure water production device; and
a remaining amount detection unit for detecting a remaining amount of the pure water tank,
wherein the second control unit is configured to execute the limit mode when the remaining amount detected by the remaining amount detection unit falls below a reference value.

12 . The hydrogen production system according to claim 8 , further comprising:
a blow-down water line for discharging blow-down water of the boiler; a blow-down water amount adjustment device for adjusting an amount of blow-down water discharged from the blow-down water line; and a blow-down water control unit configured to control the blow-down water amount adjustment device, based on a second signal indicating information on an amount of pure water supplied from the first pure water line to the hydrogen production device.

13 . The hydrogen production system according to claim 12 , further comprising a water meter for measuring an amount of the blow-down water discharged from the blow-down water line,
wherein the first signal is an output signal of the water meter, and wherein the second control unit is configured to control the second adjustment device based on the output signal of the water meter.

Assignees

• Mitsubishi Power Ltd

Inventors

• Marushima Shinya
• Tsutsumi Atsushi
• Ando Yoshimasa
• Fujita Kazunori
• Tanioka Tadateru

Classifications

• H02J15/50

  using stored hydrogen · CPC title

• F22B35/00

  Control systems for steam boilers (for regulating feed-water supply F22D5/00; for controlling superheat temperature F22G5/00) · CPC title

• F22B31/0007

  with combustion in a fluidized bed · CPC title

• Y02E60/36

  Hydrogen production from non-carbon containing sources, e.g. by water electrolysis · CPC title

• Y02E70/30

  Systems combining energy storage with energy generation of non-fossil origin · CPC title