Boiler feed-water deoxygenation system and method
A boiler feed water and deaerator technology, applied in the field of boilers, can solve the problems of low temperature, easily damaged water nozzles, and unsatisfactory deaeration effect.
Inactive Publication Date: 2019-04-12
XINAO SHUNENG TECH CO LTD
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Problems solved by technology
[0007] At present, the oxygen removal equipment (atmospheric pressure type deaerator) of the boiler has certain defects in the process and equipment, which cause the dissolved oxygen to seriously exceed the standard. According to the survey, the qualified rate of the dissolved oxygen is only 12%.
The necessary condition for the gas to be separated from the air is that the water must be heated to the saturation temperature of the steam pressure in the deaerator, otherwise the dissolved oxygen in the accumulated water will increase, and the soft water heater of the atmospheric pressure deaerator is prone to failure. It will cause the feed water to enter the deaerator without heating, and the temperature is low, causing the dissolved oxygen content of the feed water to rise sharply; in addition, the water nozzle in the deaeration equipment is easily damaged, the seasoning is volatile, and the sieve plate screws are easy to loose, etc. All problems will lead to unsatisfactory deaeration effect; in addition, the pressure regulator of the atmospheric pressure deaerator often has the phenomenon of adjustment lag, which will also lead to unsatisfactory deaeration effect
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[0032] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0033] Such as figure 1 As shown, in the prior art, the desalted water is heated by the heater 1 and then directly sent to the deaerator 2 for deaeration, and the desalted water after deoxygenation is sent to the boiler 31 and the waste heat furnace 32 respectively. The temperature of the desalinated water entering the deaerator is completely dependent on the heater, which may easily cau...
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The invention provides a boiler feed-water deoxygenation system and method. The boiler feed-water deoxygenation system comprises a heater, a reheating unit and a deaerator, wherein the heater is usedfor heating the desalted water, a water inlet of the reheating unit is communicated with a water outlet of the heater, a water inlet of the deaerator is communicated with a water outlet of the reheating unit, and a water outlet of the deaerator is communicated with a boiler. The boiler feed-water deoxygenation system can be used to improve the deoxygenation qualification rate, so that the purposeof eliminating the hidden danger in long-period stable operation of the boiler is achieved.
Description
technical field [0001] The invention relates to the technical field of boilers, in particular to a boiler feed water deaeration system and a deaeration method. Background technique [0002] Oxygen in boiler feed water can directly react with metals at high temperature, which seriously affects the safe operation and service life of the boiler. Therefore, the oxygen content in boiler feed water must be controlled within the allowable range. Taking power plant boilers as an example, it is generally required that the oxygen content of boiler feed water is less than or equal to 7ug / L. The oxygen content of feed water refers to the amount of oxygen in water, most of which is molecular oxygen dissolved in water, called dissolved oxygen, and there are also free oxygen-containing groups and oxygen. Dissolved oxygen in water is related to water temperature, oxygen partial pressure, salinity, activity of aquatic organisms and concentration of oxygen-consuming organic matter. [0003]...
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Inventor 王小娜
Owner XINAO SHUNENG TECH CO LTD