Q-Rohr® DFE - Flameless Explosion Venting for exhaust ducts of Dual-Fuel Engines
New IMO regulations, new challenges
The situation
The next phase of the International Maritime Organization (IMO) emission regulations for shipping intends to reduce the permitted sulphur and nitrogen content of fuel from the current level of 3.5 % to a level of 0.5 % in 2020. Due to the IMO tier 2 and 3 regulations, the shipping industry will increasingly be required to use alternative sources of propulsion such as dual-fuel engines and LNG-powered plants.
The challenge
When an engine is running on gas, a fault in the engine can allow a flammable mixture of gas and oxygen to occur in the exhaust system. In the worst case scenario, this could ignite and cause an explosion. The result would be a failure of the drive system and electrical power supply. Essential instruments such as radios, radar and navigation equipment could be adversely affected. In addition, exploding sections of the plant would create a serious risk of injury to persons working in the engine room.
Q-Rohr® DFE
REMBE® has used its many years of experience in explosion safety to develop a system specifically for Dual-Fuel Engines. It is lightweight and has a compact design that provides outstanding levels of safety.
Q-Rohr® DFE permits flameless explosion venting in the ship’s hull and thus protects the surrounding area against the consequences of an explosion. The ship can return to normal operations very quickly after an explosion occurs.
Q-Rohr® DFE
The compact, lightweight design of Q-Rohr® DFE enables it to be installed even in confined spaces.
Your advantages
- Maritime class certification in accordance with DNV-GL, LR, BV, ABS.
- Rapid restart of operations.
- Flameless pressure venting in the ship’s hull.
- 100 % seal tightness, to eliminate danger of asphyxiation.
- Compact, lightweight design.
- 100 % venting efficiency.
- Customized opening pressure.
- 100 % stainless steel for corrosion resistance.
- Connection flange in accordance with DIN 86044.
- Minimal maintenance required, visual inspection by a technician is sufficient.
- REMBE® stainless steel mesh design ensures a high level of noise reduction during normal operation and in the event of an explosion.
Certification | |||
 |  | Patents: DE 38 22 12; US 7,905,244 |  |
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Images
Current diesel engines will soon have to be switched to alternative fuels.
| Q-Rohr® DFE Technical data in accordance with DIN 86044 Series 1/Series 2 | ||||||||||||||||
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| DN [mm] | max. H [mm] | max. C [mm] | Ø C [mm] | Ø D [mm] | k [mm] | Ø d2 [mm] | b [mm] | No. of bolts | Recommended bolts | Weight [kg] | ||||||
| Series 1 | Series 2 | Series 1 | Series 2 | Series 1 | Series 2 | Series 1 | Series 2 | Series 1 | Series 2 | Series 1 | Series 2 | |||||
| 200 | 400 | 410 | 350 | 320 | 319 | 280 | 289 | 18 | 18 | 16 | 12 | 8 | 12 | M16 | M16 | 21 |
| 300 | 600 | 500 | 450 | 440 | 424 | 395 | 394 | 22 | 18 | 16 | 15 | 12 | 20 | M20 | M16 | 37 |
| 400 | 600 | 600 | 550 | 540 | 507 | 495 | 477 | 22 | 18 | 16 | 15 | 16 | 20 | M20 | M16 | 47 |
| 500 | 600 | 700 | 650 | 645 | 609 | 600 | 579 | 22 | 18 | 16 | 15 | 20 | 28 | M20 | M16 | 60 |
| 600 | 900 | 820 | 770 | 754 | 711 | 700 | 681 | 22 | 18 | 20 | 15 | 20 | 32 | M20 | M16 | 105 |
| 700 | 900 | 920 | 870 | 856 | 813 | 800 | 783 | 22 | 18 | 20 | 15 | 24 | 36 | M20 | M16 | 115 |
| 800 | 1200 | 1020 | 970 | 958 | 915 | 900 | 885 | 22 | 18 | 20 | 15 | 24 | 44 | M20 | M16 | 150 |
| 900 | 1200 | 1120 | 1070 | 1060 | 1017 | 1010 | 987 | 22 | 18 | 20 | 15 | 28 | 48 | M20 | M16 | 175 |
| 1000 | 1400 | 1220 | 1170 | 1162 | 1119 | 1110 | 1089 | 22 | 18 | 20 | 15 | 32 | 52 | M20 | M16 | 215 |
| 1100 | 1400 | 1320 | 1270 | 1266 | 1223 | 1210 | 1193 | 22 | 18 | 20 | 15 | 32 | 60 | M20 | M16 | 245 |
| 1200 | 1600 | 1430 | 1380 | 1366 | 1323 | 1310 | 1293 | 22 | 18 | 20 | 15 | 36 | 64 | M20 | M16 | 300 |
| 1300 | 1600 | 1530 | 1480 | 1466 | 1423 | 1410 | 1393 | 22 | 18 | 20 | 15 | 40 | 68 | M20 | M16 | 335 |
| 1400 | 1600 | 1630 | 1580 | 1566 | 1523 | 1510 | 1493 | 22 | 18 | 20 | 15 | 40 | 72 | M20 | M16 | 380 |
