MULTI-SECTION BOILER AND CONTROL METHOD OF SUCH BOILER, WHICH PREVENT EXIT GAS THRUST REVERSING Russian patent published in 2012 - IPC F24H9/20 

FIELD: power industry.

SUBSTANCE: invention refers to control method of multi-section boiler consisting of several sections installed in a row, which prevents exit gas thrust reversing. Each of the above sections is equipped with the following: sensor for measuring the head of the air supplied to combustion chamber, controller to control the rotation speed of the fan supplying the air to chamber according to the value measured with head sensor; at that, one of controllers is connected as primary controller and the others - as secondary ones. Primary and secondary controllers are connected to each other by means of communication line. Control method involves the following: measurement of the head of air supplied to combustion chamber by means of head sensor at controllers of operating sections; calculation by means of primary controller of average head in operating sections as per head values measured with their controllers; calculation on the basis of average head of the value of the required head on fans of sections not in operation; control of fans of sections not in operation on the basis of the calculated values.

EFFECT: possibility of creating cheaper multi-section boiler in which exit gas valves are not required, which also allows avoiding failures and reducing the maintenance costs.

12 cl, 5 dwg