application of innovative developments in material sciences for heat power devices
DESCRIPTION
Application of Innovative Developments in Material Sciences for Heat Power Devices. Prof. Boris L. Krit. K.E. Tsyolkovsky «MATI» - Russian State Technological University Technologies of Materials Treatment by High Energy Flows Department www.tompve.ru - PowerPoint PPT PresentationTRANSCRIPT
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Application of Innovative Developments in Material Sciences
for Heat Power Devices
K.E. Tsyolkovsky «MATI» - Russian State Technological UniversityTechnologies of Materials Treatment by High Energy Flows Department www.tompve.ru
tel: +7-495-3538334, fax: +7-495-3538372, e-mail: [email protected]
Prof. Boris L. Krit
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At present flameless catalytic burning is the most economic method of fuels burning among all-known ones (efficiency of 99-99,8%). Catalytic oxidation proceeds at moderate temperatures 400-680 0C (in torch furnaces – 1200-1800 0C), but with very high velocity. Thermal strength – to 108 kJ/m3 per hour (for modern furnace devices at normal pressure – not higher than 106).
Most important element of the HPG is catalytic fire nozzles (panels, matrixes) on which occurs actually oxidation process. One of the reasons constraining propagation of HPG – insufficient
technical and economic efficiency of ceramic or metal fire nozzles.
Variants of the flameless heatpower generator (HPG) designs
Ceramic fabric Punching ceramics
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Scheme of the pendant drop melt extraction (PDME) method
Possibility of high-melt and composition fibers production due to non-
tigel melting
The scheme and view of installation for fibers obtaining and canvases formation by the PDME method.
1 ‑ moving (the accepting) surface; 2 ‑ forming canvas; 3 ‑ workpiece to dispersion; 4 – rotated heat receiver.
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The PDME installation is intended for obtaining fibers and porous mats from
them directly during fiber's production.
Settlement productivity is 65 kg of fiber per day.
Rods with a diameter of 12 mm and 800 mm long are used as workpieces.
At the same time it is possible to use some workpieces.
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PDME method application at a extraction of fibers (threads) from several rods provides process productivity increase and
formation of a canvas reduces a production cycle time
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Structure of canvases made from the metal fibers and used for creation of porous permeable elements
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Modification by nano-ceramic synthesis on metal surfaceMicroarc Discharge Oxidizing (MDO)
ООО «РУССКИЕ КОТЛЫ»
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Fields of MDO applications
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High temperature and pressure in discharge
channels, rapid cooling
T2000-8000 К
P106 Pa, v106 К/с
A – anodic half-period C – cathodic half-period
E l e c t r o l y t e
An- Am- OH- O2-
Men+ Mem+
M e t a l
.
E l e c t r o l y t e
H+ Men+
M e t a l
A C
Valve metals (Al, Mg, Ti, Ta, Nb, Zr, Be, Hf, W, Bi, Sb, U) exhibits the valve effect with forming AOF in metal-oxide-electrolyte system
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Surface of metal before MDO
3
2
1
Structure of MDO- proceeding surfacesMultylayered composite material:1 – transitive layer 2 – functional layer 3 – technological layer
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Scheme of the MDO equip and proceeding
1 – electrolyte bath; 2 – water cooling; 3 – bubbler; 4 – electrolyte; 5, 6, 9 – valves; 7 – filter; 8 – water pump;
10 – heat exchanger (cooler); 11 – object of proceeding; 12 – air compressor; 13 – exhaust umbrella; 14 – exhaust fan;
15 – technological power supply
Object of proceeding
Preliminary cleaning(washing to degreasing)
Rinse after treatment
Drying
Ready made products
MDO
Flow diagram under MDO
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MDO technological line
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Formed from metal fibers porous mat (а) and the same material after ceramization by MDO (б).
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Examples of MDO usage for another heat power appliances
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Many thanks for your attention!
K.E. Tsyolkovsky «MATI» - Russian State Technological UniversityTechnologies of Materials Treatment by High Energy Flows Department www.tompve.ru
tel: +7-495-3538334, fax: +7-495-3538372, e-mail: [email protected]