Title:
【発明の名称】ボイラ制御装置
Document Type and Number:
Japanese Patent JP2677787
Kind Code:
B2
Abstract:
A boiler control system includes a first device (51) for measuring or computing a rate of change in steam temperature and a generated thermal stress in a pressure part of a boiler, and a second device (60) for controlling a steam temperature or a rate of change in the steam temperature at the pressure part of the boiler in accordance with a desired value, and a third device(71) which was functions for storing in a memory (54) combinations of the steam temperature and the thermal stress at each moment as obtained by the first means (51); for determining, from the combinations stored in the memory, a relationship between a steam temperature changing rate and a maximum thermal stress caused by the steam temperature changing rate; determining, in accordance with the relationship, a steam temperature changing rate limit value necessary for maintaining an actual thermal stress in the pressure part of the boiler below a maximum thermal stress limit value which is predetermined beforehand or which is given for each start-up of the boiler; and delivering the steam temperature changing rate limit value or desired steam temperature value obtained by integrating the steam temperature changing rate limit value to the second device as the desired value.
Inventors:
Miho Miho
Atsushi Kuramoto
Atsushi Kuramoto
Application Number:
JP26278186A
Publication Date:
November 17, 1997
Filing Date:
November 06, 1986
Export Citation:
Assignee:
Babkotsu Hitachi Co., Ltd.
International Classes:
F22B35/14; F22B35/18; F22B35/00; (IPC1-7): F22B35/00; F22B35/14
Domestic Patent References:
| JP59157402A |
Attorney, Agent or Firm:
Kenjiro Take