TOWER-TYPE BOILER WITH PRIMARY REHEATER AND SECONDARY REHEATER

摘要

A tower-type boiler with a primary reheater and a secondary reheater is provided. A super heater of the boiler comprises a low-temperature super heater and a high-temperature super heater (31). A main steam system flow of the boiler comprises the following steps: firstly, feeding water enters into a front flue coal economizer and a rear flue coal economizer (10) which are arranged in parallel, then water came from the outlets of the coal economizers (10) enters into water-cooling walls (1, 2) from the lower part of a hearth (6), wherein the outlets of the water-cooling walls (1, 2) are connected to a separator (19), and at last, the steam came out of the separator (19) enters into the low-temperature super heater and the high-temperature super heater (31) successively. Along the steam flow direction which is from a low temperature to a high temperature at the side of the steam, the primary reheater successively comprises a primary reheating low-temperature reheater (11) and a primary reheating high-temperature reheater, and the secondary reheater successively comprises a secondary reheating low-temperature reheater (12) and a secondary reheating high-temperature reheater. Furthermore, the primary reheater and the secondary reheater are in parallel with each other in a perpendicular flue.