Discussion on Feed-Water Treatment Technology of Supercritical Unit

The oxygenated feed-water treatment technology of supercritical unit can effectively decrease the corrosion of water-steam system, and thus steam-water quality and operating efficiency are greatly promoted. In view of modes of feed-water treatment technology for supercritical unit, the characteristics of oxide film in thermal system under AVT and OT conditions are compared; and then, the principle of oxygenated feed-water treatment technology was elaborated. Besides, the oxygenated conditions, controlling of water quality, advantages, the relation between formation of oxide scale and oxygen plus are analyzed. Finally, the paper introduced weak oxiding feed-water treatment technology, with the principle of low oxygen and high pH value.

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Feed-Water Treatment Technology of Supercritical Unit

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1081.103 ◽

2014 ◽

Vol 1081 ◽

pp. 103-109

Author(s):

Guo Hua Lu ◽

Qiao Ling Peng ◽

Shun An Cao

Keyword(s):

Water Quality ◽

Water Treatment ◽

Ph Value ◽

Operating Efficiency ◽

Feed Water ◽

Low Oxygen ◽

Treatment Technology ◽

Water Steam ◽

Water Treatment Technology ◽

Steam System

The oxygenated feed-water treatment technology of supercritical unit can effectively decrease the corrosion of water-steam system, and thus the steam-water quality and the operating efficiency are greatly promoted. In view of the mode of feed-water treatment for supercritical unit, the characteristics of oxide film in thermal system under AVT and OT conditions are compared; and then, the principle of oxygenated feed-water treatment technology was elaborated. Besides, the oxygenated conditions, controlling of water quality, advantages, the relation between the formation of oxide scale and oxygen plus are analyzed and discussed. Finally, the paper introduced weak oxiding feed-water treatment technology for supercritical unit, with the principle of low oxygen and high pH value.

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Neutralization of Acid Wastewater and Magnesium Hydroxide Slurry from Seawater Electrolytic Pretreatment

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1073-1076.949 ◽

2014 ◽

Vol 1073-1076 ◽

pp. 949-954 ◽

Cited By ~ 2

Author(s):

Jing Nie ◽

Shou Zhi Yi

Keyword(s):

Water Treatment ◽

Magnesium Hydroxide ◽

Industrial Wastewater ◽

Ph Value ◽

High Adsorption ◽

Treatment Technology ◽

Secondary Pollution ◽

Scientists And Engineers ◽

High Adsorption Capacity ◽

Water Treatment Technology

Produced in industrial production processes such as electrolysis, electroplate and metal pickling, industrial wastewater, which contains acids, varieties of heavy metal and whose pH value is less than 6, can be very damaging to our daily life and environment and is an urgent issue to be solved. In recent years, with environmental protection becoming an important issue around the world, and environmental regulations becoming more and more complete, the traditional water treatment technology which can cause secondary pollution is gradually restricted, and this leads to the result that environmental scientists and engineers pay more attention on the development and application of "environmentally friendly" water treatment technology[1]. Of all acid wastewater neutralizers, magnesium hydroxide, known as "green and safe neutralizer"[2, 3], is safe, reliable, non-toxic, harmless, and has high buffer performance, high activity, high adsorption capacity, and no corrosivity compared with traditional strong alkali substances (such as CaO, Ca (OH)2and NaOH, etc.). Therefore magnesium hydroxide has been widely used in the acid wastewater neutralization[4].

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The Status and Development of Water Treatment Technology for Supercritical Unit

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.940.52 ◽

2014 ◽

Vol 940 ◽

pp. 52-58

Author(s):

Guo Hua Lu ◽

Qiao Ling Peng ◽

Yang Mei ◽

Zheng Feng Li ◽

Shun An Cao

Keyword(s):

Water Quality ◽

Water Treatment ◽

Power Plants ◽

Present Situation ◽

Field Investigation ◽

Feed Water ◽

Treatment Technology ◽

The Status ◽

Treatment Technologies ◽

Development Prospects

The paper is to study the water treatment technologies for supercritical unit to improve its steam-water quality and ensure safe and economical operation. Based on lots of domestic and foreign literature and field investigation in some typical power plants, the paper summaries present situation and development prospects of the technology and system process of water treatment for supercritical unit, and also compared the technologies, including make-up water, condensate water and feed-water treatment, from theoretical and technical prospective.

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Application of Electrosorption Desalination Technology in Coking Wastewater Treatment

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.573-574.516 ◽

2012 ◽

Vol 573-574 ◽

pp. 516-520

Author(s):

Nan Zhang ◽

Gai Feng Xue ◽

Pu Liu ◽

Li Na Wang

Keyword(s):

Water Treatment ◽

Ph Value ◽

Removal Rate ◽

Cooling Water ◽

Economic Benefits ◽

Coking Wastewater ◽

Toxic Substances ◽

Treatment Technology ◽

Circulating Cooling Water ◽

Water Treatment Technology

Coking wastewater is generated from metallurgy industry and it contains many highly toxic substances. Because the coking wastewater would bring about severe environmental pollution, it is best to reuse it as circulating cooling water. However, there are large quantities of ions in coking wastewater, which would cause serious corrosion to the pipe and the devices in the process of recycling. Therefore, desalting techniques are necessary for the reused of coking wastewater. Electrosorption technique (EST), as a new type of water treatment technology, can meet the economic benefits of water treatment technology. It also can achieve better water quality and reliability standards which have never been achieved before. In this paper, a new electrosorption device was invented and it was used for desalting of coking wastewater. The main parameters affecting the electrosorption of ions including voltage, electrosorption time, pH value, temperature and electric current have been investigated in detail. Under the optimized experimental condition, after electrosorption process, a salt removal rate of 75% was obtained. The quality of effluent could satisfy the criterion of industrial circulating cooling water (GB 50050-2007) and could be reused as the circulating cooling water in coking plant.

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EDI Technology Application and Exploration in the Power Plant Boiler Feed Water Preparation Areas

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.737.285 ◽

2015 ◽

Vol 737 ◽

pp. 285-288

Author(s):

Yu Yun Fu ◽

Jin Duo Shi

Keyword(s):

Water Treatment ◽

Power Plant ◽

Feed Water ◽

Treatment Technology ◽

Boiler Water ◽

Technology Application ◽

Power Plant Boiler ◽

Water Treatment Technology ◽

Plant Boiler ◽

Boiler Feed Water

EDI water treatment technology currently in power plant boiler feed water preparation systems more and more common. The main reason is due to the EDI water treatment technology has obvious advantages in terms of environmental protection. However, during operation to ensure that the equipment is running well and boiler water effluent quality to meet the requirements, but also the factors affecting the operation of enough attention. Through the analysis of the actual operation characteristics of EDI case of water treatment technology and application notes were simply described.

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