A method and system for recovering and utilizing exhaust heat energy of a fully automatic deaerator

Abstract

The invention discloses a full-automatic deaerator exhausting heat energy recycling method. The method includes the following steps that firstly, a full-automatic deaerator exhausting heat energy recycling system is manufactured; secondly, steam exhausted by a deaerator enters a water-steam mixer, desalted water in a slag cooling machine enters the water-steam mixer, the desalted water entering the water-steam mixer and the steam flow oppositely in opposite directions and are sufficiently mixed in a contact manner in a mixing cavity of the water-steam mixer to form a uniform water-steam mixture, and then the water-steam mixture enters a degassing water storage tank through a connecting pipeline; thirdly, the water-steam mixture is heated, degassing and deoxidizing are conducted, non-condensable gas which is separated out is discharged into the atmosphere, first-class deoxidizing and exhausting are achieved, and the water-steam mixture obtained after first-class deoxidizing and exhausting flows into a pressure bearing buffering tank; and fourthly, the non-condensable gas overflows out of the water surface of the pressure bearing buffering tank and is then discharged out, second-class deoxidizing and exhausting are achieved, and hot water flows back into the deaerator. The invention further discloses the full-automatic deaerator exhausting heat energy recycling system.

Description

technical field [0001] The invention relates to the field of heat energy recovery of deaerator exhaust steam, in particular to a fully automatic deaerator exhaust heat energy recovery method and system thereof. Background technique [0002] Energy saving is a long-term strategic policy of my country's economic development. Energy saving is not only to alleviate the contradiction of social energy demand, but also to promote the sustainable, healthy and rapid development of the national economy and the need to protect the ecological environment. In recent years, with the country's in-depth development of energy conservation and emission reduction work, it is an inevitable trend for power plants to carry out energy conservation and emission reduction work. At present, energy saving and consumption reduction has become a major issue related to the sustainable development of social economy such as national economic security, international market competitiveness, resource protecti...

AI Technical Summary

Problems solved by technology

[0006] 1. Low pressure, containing oxygen and other non-condensable gases, relatively small flow rate, and no additional pressure is allowed, which makes the recovery and utilization of exhaust steam very difficult, and the heat recovery efficiency is low;

[0007] 2. The effect of deoxygenation and exhaust steam is poor. There are still steam with non-condensable gases such as oxygen in the hot water recovered to the deaerator. Even if the heat is recovered, additional oxygen is introduced into the deaerator;

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