摘要:
A circulating fluidized bed boiler is disclosed. The circulating fluidized bed boiler comprising: a furnace defined and enclosed by water walls, a ceiling and an air distributor, the water walls comprising front and rear walls and left and right side walls (AJ, TK) formed by water cooling tubes, and the water walls are provided with secondary air ports (Y) in the lower part thereof, and furnace flue gas outlets (AB, EF, IJ, KL, OP, ST) being provided in an upper part of the furnace; at least two cyclones connected with the furnace flue gas outlets (AB, EF, IJ, KL, OP, ST); a loop-seal is connected with solid outlets of the cyclones and the lower part of the furnace, respectively; and a flue gas duct connected with flue gas outlets of the cyclones wherein the water cooling wall tubes of the water wall form at least one vertical columnar recessed segment (BCDE, FGHI, SRQP, ONML) recessed toward the inside of the furnace, and the at least one columnar recessed segment (BCDE, FGHI, SRQP, ONML) extends at least 15% of the furnace height in a vertical direction.
摘要:
An evaporator (10) for evaporating a liquid includes a plurality of harps (20) disposed within a duct or chamber such that a heated fluid flow (22) (e.g., heated gas or flue gas) passes through each successive row of harps (20) of the evaporator (10). Each of the harps (20) includes a lower header (24), a plurality of lower tubes (26), an intermediate equalizing chamber 28, a plurality of upper tubes (30), and an upper header (32). The lower tubes (30) are in fluid communication with the lower header (24) and extend upward vertically from the lower header. The upper ends of the lower tubes (26) are in fluid communication with the equalizing chamber (28). The upper tubes (30) are in fluid communication with the equalizing chamber (28) and extend upward vertically from the equalizing chamber. The upper ends of the upper tubes (30) are in fluid communication with the upper header (32).
摘要:
A boiler system including a first manifold, a second manifold provided at an elevation above the first manifold, and a heat exchanger conduit fluidly connecting the first and second manifolds. The conduit is provided within a first fluid flow, and the heat exchanger conduit receives a second fluid. A thermocouple is provided within the second manifold to measure a temperature of the second fluid within the second manifold. A control unit is provided to maintain a level of liquid phase of the second fluid such that liquid phase of the second fluid does not enter the second manifold based on the temperature measured by the thermocouple. The boiler system can be provided with first and second conduits, where the second conduit is provided within the first fluid flow downstream of the first conduit, and where the first and second conduits are inclined with respect to a vertical axis.