METHOD OF HEATING WORKING AGENT IN TUBULAR BOILER Russian patent published in 1999 - IPC

FIELD: heat-power engineering; hot-water natural-circulation boilers employed in public services. SUBSTANCE: method consists in passing working agent through twin four-way (by water) lateral convective baffle walls in downtake shafts and then through furnace radiation baffle walls with one row of ports: lateral four-way baffle wall, front two-way baffle wall, second lateral four-way baffle wall and ceiling two-way baffle wall; working agent is circulating through baffle walls of downtake and uptake tubes with swirlers at rate of flow of working agent through downtake tubes of 1.25 to 1.5 m/s. According to second version, working agent after convective lateral baffle walls of downtake shafts is passed through chain of furnace radiation baffle walls: lateral four-way baffle wall with one row of windows, ceiling two-way baffle wall with one row of windows, second lateral four-way baffle wall with one row of windows, frontal two-way baffle wall with one row of windows and central four-way baffle wall with two rows of windows; according to third version, working agent is simultaneously additionally directed in parallel by water through chain of furnace radiation baffle walls: central four-way baffle wall with two rows of windows, lateral four-way baffle wall with one row of windows, frontal two-way baffle wall with one row of windows, second lateral four-way baffle wall with one row of windows and ceiling two-way baffle wall with one row of windows. EFFECT: increased heat extraction from unit of boiler area. 3 cl, 5 dwg