A NEW TYPE OF FILM EVAPORATORS

The author is a lead engineer in thermal physics, research Institute of atomic reactors. Experience 30 years: modernization of the cooling circuits of nuclear research reactors RBT-6 and MIR-M1, installation of deep evaporation in Busher (Iran) and Kudankulam NPP (India) development of evaporators for LNPP-2 .

Publication and feedback about the new the evaporator can be viewed at the link: drum Use of film devices in radioactive waste conditioning technology

or

http://www.journal-of-nuclear-.

The features of the units, providing low radiation doses to the personnel, besiegement and the required parameters of the evaporation give a special advantage in the market of equipment for processing liquid radioactive waste (LRW) low and medium activity at a cost of LRW processing from 500 to 8000 $/m3. Demand in the international market, these units can be estimated by the feedback to the article "Use of drum film devices in radioactive waste conditioning technology" (http://www.journal-of-nuclear-physics.com/?p=919&cpage=1#comments)

A proposed vacuum-distillation systems in other industries need to evaluate on the basis of their advantages (the absence of sediments, high degree of purification of the distillate of the flash steam and the achievable concentration level, low energy consumption)

A new type of evaporating equipment, has advantages when the evaporation of solutions, are prone to scale formation on heat exchange surfaces.

Competitive advantages:

— Vacuum distillation in film evaporators, drum type: simple principle – effective result!

Recirculation of thermal energy provides high efficiency and eliminates the need to couple the heating and cooling circuit;

— Reel film evaporator self-cleaning system provides continuous cycle operation without deterioration of the heat transfer;

— Automatic operation with simple system control and management;

— The possibility of additional cleaning system secondary steam;

— Multifunctional complex: distillation, extraction, concentration;

— Low requirements to personnel qualification;

— Nuclear energy is dramatically reduced radiation exposure of personnel due to the lack of szomolanyi heat exchange tubes;

— High maintainability;

— Relatively low cost of the devices and their installation;

— Low operating costs;

— Adaptability to continuous technological cycle.

Film evaporation:

No boil and drip-aerosol entrainment from the film surface

Smooth rotation of the vessel:

No spray and low foaming in the presence of surface-active veshestv

Stratification according to density privelage solution (concentration of heavy fractions and precipitation at the bottom)

Mechanical cleaning of heating surfaces:

A thorough cleaning under the level perivenous liquid allows to maintain the efficiency of the heat exchanger without any negative impact on the degree of purification of the condensate flash steam