Steam extraction backheating and pressure stabilizing blowpipe system of generator set

Abstract

The invention provides a steam extraction backheating and pressure stabilizing blowpipe system of a generator set. The steam extraction backheating and pressure stabilizing blowpipe system comprises a blowpipe temporary system and further comprises a steam extraction temporary system, wherein the blowpipe temporary system receives steam produced by a boiler; in the steam extraction temporary system, a temporary pipeline is led out of a steam pipeline behind a reheater target board of the blowpipe temporary system and is connected with a high-pressure heater of a generator set; reheated steam flowing through the reheater target board is delivered to the high-pressure heater and used for heating the water supply of the boiler; and a water discharging pipeline is arranged at the steam output end of the high-pressure heater. In the invention, the water supply of the boiler is heated by adopting steam blowing, and an extra steam source is not required, so that total fuel consumption is greatly reduced, and smoke quantity is also greatly reduced. As a result, convection heat exchange quantity is reduced so as to better regulate the temperature of superheated steam and reheat steam.

Description

technical field [0001] The invention relates to the field of boiler purging, in particular to a blowing system for steam extraction, heat recovery, and pressure stabilization of a generator set. Background technique [0002] The purging of the boiler superheater, reheater and its steam pipeline system is an important process before the new unit is put into operation. Various sundries in the pipeline (such as: sand, stones, whirling chips, iron scale, etc.), prevent the unit from overheating, reheater tube burst and damage to the flow part of the steam turbine during operation, and improve the safety and economy of the unit. And improve the steam quality during operation to ensure the safe and stable operation of the unit. [0003] At present, the main blowing methods are two forms of pressure-reducing purge and constant-pressure purge. Among them, the blowpipe temporary system for constant pressure purge is as follows: figure 1 As shown by the dotted line, the direction o...

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Problems solved by technology

[0010] The invention provides a generator set steam extraction heat recovery and pressure stabilizing blowpipe system, which is used to solve the problem in the prior art that it is difficult to implement the pressure stabilizing blowpipe for a newly built unit without an external heating steam source

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