An energy-saving and environment-friendly treatment system for atmospheric expansion vessel exhaust steam

Abstract

The invention discloses an atmospheric flash tank vapour-discharging energy-saving environment-friendly treating system. The system comprises a dredging and draining water input passage, a flash tank,a condensing water tank, a vapour discharging condensing device, a vapour discharging heating device, a vapour output passage, a fan, an air preheating device, a high-temperature medium input passageand a high-temperature medium output passage; the dredging and draining water input passage is communicated with the inlet formed in the side face of the middle of the flash tank, the outlet formed in the bottom of the flash tank is communicated with the inlet of the condensing water tank, the outlet formed in the top of the flash tank is communicated with the inlet formed in the heat dischargingside of the vapour discharging outlet passage, the outlet formed in the heat discharging side of the vapour discharging condensing device is communicated with the vapour discharging pipeline throughthe heat absorbing side of the vapour discharging heating device, the outlet of the fan is communicated with the inlet of the air preheating device through the heat absorbing side of the vapour discharging condensing device, the inlet formed in the heat discharging side of the vapour discharging heating device is communicated with the high-temperature medium input passage, and the outlet formed inthe heat discharging side of the vapour discharging heating device is communicated with the high-temperature medium output passage. By means of the system, the recovery of vapour discharging workingmediums and heat of the flash tank can be achieved, and the purpose of eliminating white smoke plume can be achieved.

Description

technical field

[0001] The invention belongs to the technical field of boilers, and relates to an energy-saving and environment-friendly treatment system for exhaust steam of an atmospheric expander. Background technique

[0002] Atmospheric expander is an important auxiliary equipment of the boiler system, and it is used in boilers with various parameters such as low pressure, medium pressure, high pressure, subcritical, supercritical and ultra supercritical. Its function is to accept the drainage, water release and steam of different parameters in the various stages of the boiler start-up and operation process. The high-temperature, high-pressure water and steam expand and depressurize in the expansion vessel, and the saturated water generated gathers at the bottom of the expansion vessel and flows into the condensation. The water tank is comprehensively utilized, and the saturated steam generated is directly discharged into the atmosphere through the exhaust pipe of the e...

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