Water supply and preheating system and method for turbogenerator applied to medium pressure deaerator

Abstract

The invention discloses a medium-pressure deaerator supplemented water preheating system using a steam turbine generator and a method thereof. The supplemented water preheating system comprises a pressure reducing mechanism, a surface heat exchanger and a medium-pressure deaerator, wherein the pressure reducing mechanism is provided with a steam inlet pipe and a steam discharge pipe, the steam discharge pipe is connected with the surface heat exchanger, and the surface heat exchanger is provided with a drain pipe; the medium-pressure deaerator is provided with a water supplementing pipe, the water supplementing pipe is connected with the surface heat exchanger, an atmospheric deaerator is arranged between the drain pipe and the water supplementing pipe, and the water supplementing pipe isprovided with a relay pump; and the method comprises the steps of a) heat insulation and heat preservation preparation of the surface heat exchanger; b), assembly of the system; c), installation of aheat insulation mechanism; and d), preheating medium-pressure deaerator supplemented water. According to the medium-pressure deaerator supplemented water preheating system using the steam turbine generator and the method thereof, preheating can be carried out in advance before the supplemented water enters the medium-pressure deaerator, and the heating and deoxidizing efficiency of the medium-pressure deaerator is improved; and the utilization rate of energy is improved by utilizing the pressure drop of steam, the economic benefit is improved, the installation steps of the system are simplified, the connecting effect among the components is improved, and the gas tightness among the components is improved.

Description

technical field [0001] The invention belongs to the technical field of deaerators, and in particular relates to a water supply and preheating system and a method thereof for a turbogenerator applied to a medium-pressure deaerator. Background technique [0002] The deaerator is one of the key equipment of the boiler and heating system. If the deaerator has poor deoxygenation capacity, it will cause serious losses to the corrosion of the boiler feed water pipe, economizer and other auxiliary equipment, and the economic loss will be the deaerator. Dozens or even hundreds of times the cost of the oxygen generator. The principle of the spin film deaerator is that the replenishment water passes through the film tube in a spiral shape and sprays out at a certain angle to perform heat exchange with the heating steam to remove oxygen. The feed water is heated to the saturation temperature corresponding to the working pressure of the deaerator to remove the oxygen dissolved in the fee...

AI Technical Summary

Problems solved by technology

In the medium-pressure deaerator, it is necessary to heat the make-up water to remove oxygen, so that the deaeration efficiency of the medium-pressure deaerator is low

Images