| 摘要 |
<p>Disclosed is a system for drying sludge by steam extracted from a boiler set with thermal compensation, which system comprises a boiler flue (1), a boiler feed-water pipeline and a boiler set steam extraction system, with a deaerator (6) and a coal economizer (2) being provided in the boiler feed-water pipeline, the coal economizer (2) being disposed as a heat-receiving face within the boiler flue (1), a steam inlet pipe of the deaerator (6) being connected to the boiler set steam extraction system, and a water outlet pipe of the deaerator (6) being connected to a water inlet pipe of the coal economizer (2); the system further comprises a sludge-drying device (3) and a flue gas residual heat utilization device, with the sludge-drying device (3) being connected to the boiler set steam extraction system, the flue gas residual heat utilization device comprising a heat absorption section (4) and a heat discharge section (5) connected to each other via circulation pipelines, the heat absorption section (4) being arranged as the last stage heat-receiving face within the boiler flue (1), and the heat discharge section (5) being disposed on the water inlet pipe of the deaerator (6). With the system, the sludge is dried by making use of the steam from the boiler set and the thermal compensation to the boiler system is carried out by means of a flue gas residual heat recovery device, so as to improve the utilization rate of the flue gas used indirectly in drying the sludge.</p> |
