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
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
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.
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.
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
Structure of canvases made from the metal fibers and used for creation of porous permeable elements
Modification by nano-ceramic synthesis on metal surfaceMicroarc Discharge Oxidizing (MDO)
ООО «РУССКИЕ КОТЛЫ»
Fields of MDO applications
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
Surface of metal before MDO
3
2
1
Structure of MDO- proceeding surfacesMultylayered composite material:1 – transitive layer 2 – functional layer 3 – technological layer
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
MDO technological line
Formed from metal fibers porous mat (а) and the same material after ceramization by MDO (б).
Examples of MDO usage for another heat power appliances
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]