Boiler Feed Water Circulation Deoxygenation System in Steam Turbine Generating Set

Abstract

The invention discloses a boiler feed water circulating deoxidation system in a turbine generator set. The system comprises a deoxidation tower and a deaerator water tank, wherein a heat source is connected with a heat source inlet of the deoxidation tower through a heat source pipe; a drain port of a hot well at the bottom of a condenser is connected with a condensed water return port of the deoxidation tower through a water return pipe; a water supplementing source is connected with a water supplementing inlet of the deoxidation tower through a water supplementing pipe; a drain port of the deaerator water tank is connected with a water inlet of a boiler through a connecting pipe; a water feed pump and a boiler water feed adjusting valve are arranged on the connecting pipe; a condensed water pump is arranged on the water return pipe; a circulating pipe is arranged on the connecting pipe between the water feed pump and the water inlet of the boiler; a water inlet of the circulating pipe is communicated with the connecting pipe through a through hole in the side wall of the connecting pipe; and a water outlet of the circulating pipe is communicated with the water supplementing pipe through a through hole in the side wall of the water supplementing pipe. The system can circularly remove oxygen in water entering the boiler for multiple times, so that the deoxidation effect is good.

Description

technical field [0001] The invention relates to the field of boiler feedwater deaeration equipment, in particular to a boiler feedwater circulation deaeration system used in steam turbine generator sets. Background technique [0002] During the power generation operation of the steam turbine, the hot steam generated by the boiler enters the steam turbine and expands to do work, so that the blades in the steam turbine rotate to drive the generator to generate electricity. The waste steam after the work passes through the condenser to form condensed water, which is mixed with water to form Boiler feed water is sent back to the boiler for use. Because the dissolved oxygen in the boiler feed water will cause oxygen corrosion on the metal surface, thereby corroding the boiler components, the corrosive substances produced by the corrosion of the boiler components will enter the boiler, and the corrosive substances entering the boiler will precipitate and accumulate on the boiler. ...

AI Technical Summary

Problems solved by technology

At present, the most common way to deaerate boiler feed water is to use thermal deaeration, that is, to set up a deaerator. The deaerator includes a deaerator tower and a deaerator tank. Condensed water and make-up water enter the deaerator tower and then enter In the deaerator water tank, the boiler feed water output from the deaerator water tank is sent back to the boiler for use. In the actual operation process, due to the large temperature difference between make-up water and condensate water, there are thermal load fluctuations, which will cause deaeration The fluctuation of the working condition of the deaerator tower in the deaerator will lead to the deterioration of the deaeration effect of the deaerator tower and seriously affect the deaeration effect of the deaerator tower

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