Boiler water heating and deoxidizing system and method

Abstract

The invention discloses a boiler water heating and deoxidizing system and method. The boiler water heating and deoxidizing system comprises a soft water pool, a water feeding pump, a water segregator, a heater, a heat exchanger, a recuperator, a deaerator and a boiler; soft water for the boiler is stored in the soft water pool, and the soft water in the soft water pool is conveyed to the water segregator through a pipeline by the water feeding pump; soft water is divided into a plurality of branches by the water segregator, part of the branch soft water enters the heater for active heating, the other part of the branch soft water enters the heat exchanger for heat exchange and heating, the branch soft water finally gathers in the recuperator and is reheated, the heated soft water enters the deaerator for deaeration operation, the deaerator conveys deoxygenated soft water into the boiler for later use, high-temperature steam generated in the operation process of the boiler is conveyed to the heat exchanger, and the heat exchanger conducts heat exchange heating on the soft water through high-temperature steam; and the boiler water heating a deoxygenization system not only can remove oxygen in feed water, but also can remove other gases dissolved in the water, and no other residual substances exist.

Description

Technical field [0001] The present invention relates to the field of boiler water emissions, and in particular, to a boiler water heating and oxygenation system and method. Background technique [0002] The oxygen in the boiler can be chemically reacted directly with the metal at high temperatures. The amount of oxygen in water is referred to in which most of them are molecular oxygen dissolved in water, referred to as dissolved oxygen, and there is a free oxygen group, oxygen, water temperature, oxygen partial pressure, salinity, The activity of aquatic organism and the concentration of hydrogen-consuming organic matter; [0003] The existing industrial boiler generally adopts thermal dehydration, the principles, including Dalton's law, Henry Law, Dalton Power Pressure: The total pressure of mixed gas is equal to the sum of the components of each composition gas, Henry Law: At the temperature, when the gas dissolved in the water is in a dynamic balance, the mass of the gas in un...

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Problems solved by technology

[0004] The necessary condition for the gas to be separated from the water is to heat the water to the saturation temperature of the steam pressure in the deaerator, otherwise the dissolved oxygen in the water will increase. At present, the boiler water heating and deaeration on the market usually only has a single heating source. The heat exchange heating of high-temperature steam is greatly fluctuated by external influences, and it is easy to cause the water to enter the deaerator without heating completely, resulting in a sharp increase in the dissolved oxygen content of the water. If the active heating of the heater is used, the economic cost of deoxygenation is too high. Therefore, We propose a boiler water heating and oxygen removal system and method

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