Combustion controlling device

Abstract

Two controlling devices, namely a combustion controlling device controlling the combustion of a combustion furnace, and a safety controlling device checking the operation of the devices wherein the operations are controlled by the combustion controlling device. This enables safer control of combustion because if there is a fault in either the combustion controlling device or the safety controlling device, a process can be performed by the other device to stop the combustion. Additionally, because the controlling device for controlling the structural elements that control the combustion in the boiler system and the controlling device for operational checks of the outputs from those structural elements are separate, if there is a failure in any of the structural elements or controlling devices, that failure can be detected reliably, enabling safer control of the combustion.

1 . A combustion controlling device comprising:
 a first controller outputting, to a first device controlling the combustion in a combustion furnace, a control signal controlling the operation of the first device; and   a second controller checking the operation of the first device, and controlling a second device that stops the combustion;   wherein the first controller outputs a control signal to the second control;   wherein the second controller outputs, to the first controller, an operation check result for the first device; and   wherein the first controller and the second controller perform a process to stop the combustion when it is confirmed, based on the control signal and on the operation check result, that there is a fault in the first device.   
     
     
         2 . A combustion controlling device as set forth in  claim 1 , wherein the second controller stops the combustion by controlling the second device. 
     
     
         3 . A combustion controlling device as set forth in  claim 1 , wherein the first controller stops the combustion by controlling the first device.