Nature protection technologies

2.2. Contemporary water treatment technologies at power plants and their environmental impact assessment

Part 2. WATER PROTECTION FROM DISCHARGES

2.2. Contemporary water treatment technologies at power plants and their environmental impact assessment

2.2.1. Water clarification and coagulation

Shishchenko V.V., VNIPIenergoprom; Fedoseev B.S., JSC “VTI”

 A specific feature of the domestic water treatment plants is that as a rule as water from surface reservoirs is used initial. The natural water polluted by industrial admixtures, contains a large number of the mineral impurities, suspended and organic  substances.

Part 2. WATER PROTECTION FROM DISCHARGES

2.2. Contemporary water treatment technologies at power plants and their environmental impact assessment

2.2.2. Ion-exchange demineralization of boiler make-up water

Shishchenko V.V., VNIPIenergoprom; Fedoseev B.S., JSC “VTI”

Water for steam boilers and other purposes is demineralized in our country by the means of ion-exchange technologies, consisting of two-three stages of cationic and anionic filters. Operation experience of ion-exchange technology is about 60 years. Currently improvement of ion exchange technology and increase of ion-exchanger efficiency is performed is the way of counter-current ion-exchanger designing and improvement of quality of water treatment ion-exchange resins.

Part 2. WATER PROTECTION FROM DISCHARGES

2.2. Contemporary water treatment technologies at power plants and their environmental impact assessment

2.2.3. Technology of thermal treatment of make-up water for feeding power boilers

Sedlov A.S., MPEI (TU); Shishchenko V.V., VNIPIenergoprom; Fedoseev B.S., JSC “VTI”

 Thermal water treatment is based on water distilling. Water vaporizes in one apparatus- vaporizer and condenses in another-condenser. In a vaporizer minimum salt contained in the raw water get into steam. Besides, steam is cleaned from admixtures in a special device before a condenser. Quality of distilled water, produced in a condenser meets the requirement to make-up water for power steam boilers of super-high pressure.

Part 2. WATER PROTECTION FROM DISCHARGES

2.2. Contemporary water treatment technologies at power plants and their environmental impact assessment

2.2.4. Reverse osmosis demineralization of water

Shishchenko V.V., VNIPIenergoprom; Fedoseev B.S., JSC “VTI”

 An increased interest to reverse osmosis technology is observed in domestic water demineralization practice in recent years. A number of reverse osmosis units are constructed and are in a successful operation: Thermal power plant (TPP)-23 of JC “Mosenergo” (VNIIAM design, production 50 m3/h, reverse osmosis membranes –Dow Chemical); Nizhnekamskaya TPP (design and supply of Hidronoutics company, production 166 m3/h).

Part 2. WATER PROTECTION FROM DISCHARGES

2.2. Contemporary water treatment technologies at power plants and their environmental impact assessment

2.2.5. Experience of implementation of low waste water treatment systems

Shishchenko V.V., VNIPIenergoprom; Fedoseev B.S., JSC “VTI”

 More and more attention is paid worldwide to a complex solution of a waste water burning issue on a power plant scale.  The approach is based on water circulation and recycling of natural water aimed at maximum possible reduction in water consumption and waste water volume.

Part 2. WATER PROTECTION FROM DISCHARGES

2.2. Contemporary water treatment technologies at power plants and their environmental impact assessment

References to § 2.2

  1. Федосеев Б.С. Современное состояние водоподготовительных установок и водно-химических режимов ТЭС // Теплоэнергетика. 2005. № 7. С. 2—9.