PULVERISED COAL FURNACE Russian patent published in 2015 - IPC F23C5/08 

FIELD: heating.

SUBSTANCE: pulverised coal furnace comprises screened a rectangular vertical combustion chamber 1 and a double-slope cold funnel 2, an ash hopper 3, direct-flow pulverised coal burners 4-27 installed according to the opposite-displaced pattern on opposite walls of the combustion chamber 1 and inclined downwards, with lighting torches 28-39, placed underneath, air nozzles installed below the narrow cross section of the cold funnel 2 according to the opposite-replaced pattern and directed as inclined upwards. On large vertical walls of the ash hopper 3 there are air nozzles 40-90 installed in a dispersed manner in the quantity exceeding the number of pulverised coal burners 4-27, and axes of these nozzles are directed at a sharp angle relative to vertical walls of the ash hopper 3 with their crossing of the narrow horizontal cross section of the cold funnel 2, besides, the specified angle is below the sharp angle between slopes of the cold funnel 2 and vertical walls of the ash hopper 3. Pulverised coal burners 4-27 are installed in 2 tiers in staggered order on each wall, lighting torches 28-39 are placed under pulverised coal burners of the lower tier 4-15, above pulverised coal burners of the upper tier 16-27 there are nozzles of tertiary air installed as inclined downwards at the angle that is more than the angle of downward inclination of pulverised coal burners 4-27, and outlet parts of burners and nozzles of tertiary air 91-102 are made in the form of blocks from several pipes arranged above each other.

EFFECT: invention makes it possible to increased reliability of operation of screen pipes of a cold funnel, thermal capacity of a furnace.

2 cl, 2 dwg