Combustion Controlling Device and Combustion System

Patent metadata

Field	Value
Publication number	US-2016305658-A1
Application number	US-201615130004-A
Country	US
Kind code	A1
Filing date	Apr 15, 2016
Priority date	Apr 17, 2015
Publication date	Oct 20, 2016
Grant date	—

Abstract

Safety and stability of combustion are improved by a combustion controlling device that controls the operation of 2 or more burners and stops all the operation of the burners when combustion states of the burners satisfy a predetermined condition, and the predetermined condition includes a first shutoff condition for stopping the operation of the burners at the time of an initial startup to ignite a desired burner from a state in which none of the burners is ignited, and a second shutoff condition for stopping the operation of the burners in a normal operating state after the desired burner has been normally ignited by the initial startup.

First claim

1 . A combustion controlling device that controls the operation of N (N is an integer of 2 or more) number of burners, comprising:
a determining portion that determines combustion states of the N number of burners on the basis of a first shutoff condition for stopping the operation of the N number of burners at the time of an initial startup to ignite a desired burner from a state in which none of the burners is ignited, and a second shutoff condition for stopping the operation of the N number of burners in a normal operating state after the desired burner has been normally ignited by the initial startup; and an instruction portion that generates an instruction for stopping the operation of the N number of burners on the basis of the determination result of the determining portion.

2 . The combustion controlling device according to claim 1 , wherein
the first shutoff condition is a condition for stopping the operation of the N number of burners when even one of the N number of burners is not ignited.

3 . The combustion controlling device according to claim 1 , wherein
the second shutoff condition is a condition for stopping the N number of burners when flames of M (M is an integer of N or less) number of burners among the N number of burners are not generated.

4 . The combustion controlling device according to claim 1 , further comprising:
an operation mode setting portion that sets any one of an initial startup mode for igniting the burners after performing prepurge and a normal operation mode for controlling the operation of the N number of burners in the normal operating state as an operation mode; and a shutoff condition selection unit that selects the first shutoff condition when the initial startup mode is set by the operation mode setting portion, and selects the second shutoff condition when the normal operation mode is set by the operation mode setting portion, wherein the determining portion determines whether the combustion states of the N number of burners satisfy the condition selected by the shutoff condition selection unit, or not, and the instruction portion generates the instruction for stopping all the operation of the N number of burners when it is determined by the determining portion that the combustion states of the N number of burners satisfy the selected condition, and allows the operation of the N number of burners to be continued when it is determined by the determining portion that the combustion states of the N number of burners do not satisfy the selected condition.

5 . The combustion controlling device according to claim 4 , wherein
the operation mode setting portion switches the operation mode from the initial startup mode to the normal operation mode when the desired burner is normally ignited in the initial startup mode.

6 . A combustion system comprising:
the combustion controlling device according to any one of claims 1 to 5 ; a combustion furnace having a combustion chamber in which the N number of burners are installed; and flame detectors that are installed for the respective burners, and detect the combustion states of the respective burners.

7 . The combustion system according to claim 6 , wherein
the combustion furnace includes a plurality of the combustion chambers, a plurality of the combustion controlling devices is disposed for the respective combustion chambers, and the respective combustion controlling devices control the operation of the N number of burners installed in the respective combustion chambers.

Assignees

• Azbil Corp

Inventors

• Nakata tomoya

Classifications

• F23N2237/02

  two or more burners · CPC title

• F23N2231/06

  for flame failures · CPC title

• F23N2227/10

  Sequential burner running · CPC title

• F23N2229/00

  Flame sensors · CPC title

• F23N2227/16

  Checking components, e.g. electronic · CPC title