Control Method and Application of Novel Automatic Oxygen Injection Technology

doi:10.11930/j.issn.1004-9649.201608114

Abstract

Abstract: In order to ensure the constant concentration of dissolved oxygen during unit load fluctuations, a new automatic oxygen injection technology is proposed, i. e. liquid state constant value automatic oxygen injection technique. By taking the advantage of the characteristics of incompressibility of liquids, the technique mixes pure oxygen with salt water sufficiently after they are pressurized and then the mixture is injected into the water supply system through the oxygen injection pipeline. In this way, the defect of the compressibility of oxygen can be avoided such that rigid dosing of oxygen dissolving is implemented in the desalted water. This technique has been implemented in a number of thermal power units with oxygen injection. From the results of the practices it is evident that even with random changes of feed water volume, the dissolved oxygen fluctuation will still be maintained within ±3 ug/L by using this technique. Therefore, the inherent difficulty of repetitive fluctuation of dissolved oxygen following the unit load change with gaseous oxygen-injection is solved completely. this technology can provide a strong technical support for the continuous operation, energy conservation and emission reduction of the power units.

Key words: power generating unit, feed water oxygen-adding, automatic oxygen-adding oxygen, constant value control, rigid dosing

CLC Number:

TM628.1

GUO Jinping, WANG Zhao, ZHANG Xiaohong, WANG Ningfei. Control Method and Application of Novel Automatic Oxygen Injection Technology[J]. Electric Power, 2017, 50(10): 144-147.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201608114

https://www.electricpower.com.cn/EN/Y2017/V50/I10/144

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