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Reference
COMPLEX RENEWAL OF PRUNÉŘOV POWER PLANT II, OB 01 – COAL HANDLING - NOEN, a.s.
General description
The OB01-COAL HANDLING Work subject involved realization of the complex renewal of conveying tracks in the coal handling system ensuring conveyance of energetic coal from a receiving point, formed by a discharging (sub-level) bin, to a space of the inter-bunker construction to the boiler bins of individual power units B21 to B25. In addition to renewal of the direct conveying track, reconstruction of the fuel conveyance to the yard and back from the yard to the main conveying track to the boiler plant was executed as well. The whole fuel conveyance track is solved as the two-line track.
The conveyor coal handling system also includes the equipment for qualitative and quantitative takeover of coal supplied (i.e., commercial belt scale, magnetic separators, certified fuel samplers, incl. fine grinding line) and the equipment for environmental technology – industrial vacuum cleaners, exhaustion devices, high-pressure misting equipment, fire protection and lifting equipment.
Individual (main) technological systems of the supply
Coal handling incl. coal yard – conveying devices – parameters:
| Pcs | Equipment | „Width B“ (mm) | Length L (m) | Difference in height H (m) | Drive power input N (kW) | Conveying capacity Q (t/h) | |
| 4 | Drawing-up car VV1 A B | – | travel 190 m | – | 18.5 | 400-800 | |
| 4 | Belt conveyor T2 A B | 1,200 | 238 | 5 | 110 | 800 | |
| 2 | Belt conveyor T3 A B | 1,600 | 158 | 10.6 | 200 | 1,600 | |
| 2 | Belt conveyor T4 A.B | 1,600 | 427 | 0 | 2×110 | 1,600 | |
| 2 | Belt conveyor T6 A B | 1,600 | 123 | 2 | 160 | 1,600 | |
| 2 | Belt conveyor T61 A B | 1,600 | 113 | 28.5 | 300 | 1,600 | |
| 2 | Belt conveyor T7 A B | 1,600 | 276 | 38 | 400 | 1,600 | |
| 2 | Belt conveyor T8 A B | 1,600 | 235 | 0 | 160 | 1,600 |
Stockyard machines – main parameters:
| SS1 | SS2 | |
| Output of stacking (t/h) | 1,600 | 1,600 |
| Output of loading (t/h) | 1,600 | 1,600 |
| Travel speed – working/conveying (m/min) | 0-15/18 | 0-15/18 |
| Number of rails (pcs) | 2 | 2 |
| Distance between axes of rails (m) | 7 | 7 |
| Machine travel length (m) | 300 | 300 |
| Conveyor belts – width (mm) | 1,600 | 1,600 |
Fire protection:
The water drencher curtains were built up for objects of external coal handling. The new fixed drenching fire fighting system is intended for protection of the bridge coaling, the coal handling central control room, transfer towers and conveyor belts in the discharging (sub-level) bin.
The new sprinkler system, which shall ensure fire-fighting action if required, was delivered for protection of a space above the boiler plant itself – it enables direct fire suppression in the centre of the fire so that heat exposure opens a respective sprinkler head.
Equipment for environmental technology:
A partial measure ensuring environmental coal conveyance by means of opened belt conveyors. This is the disposal of primary dust by exhaustion of flying dust by an exhaustion system, reducing dust by moistening of dust particles by high-pressure misting, and measures ensuring the disposal of deposited coal dust in the coal handling areas – by exhausting.
The main elements of the environmental technology – stationary industrial vacuum cleaner, mobile industrial vacuum cleaner, exhausting unit No. 1 (above the boiler plant), high-pressure misting units No. 1 to No. 4 (in selected points of conveying tracks).
Lifting equipment – listing
1x overhead crane (10 t), 4x overhead crane (8 t), 9x overhead crane (5 t), 1x overhead crane (4 t), 3x hoist (3.2 t), 1x hoist (0.5 t)
