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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 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, shipping will increasingly be required to use alternative sources of propulsion such as ­dual-fuel engines and LNG-powered plants.

Flameless venting Q-Rohr DFE For ship engines
The most cost-effective protection solution for Dual-Fuel Engines:
Q-Rohr® DFE.

The challenge
When it 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, bursting 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. Normal operations can ­recommence on the ship 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.
  • Individually definable opening pressure.
  • 100 % stainless steel for corrosion resistance.
  • Connection flange in accordance with DIN 86044.
  • No maintenance required, visual inspection by a technician is sufficient.
  • REMBE® stainless steel filter 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		                 


Images

Flameless venting Q-Rohr DFE onshore
The most cost-effective protection solution for Dual-Fuel Engines: Q-Rohr® DFE.
Flameless venting Q-Rohr DFE offshore on a ship engine
New emissions regulations:
Current diesel engines will soon have to be switched to alternative fuels.
Technical Information and measurements Q-Rohr
Technical Data
Technical data Q-Rohr® DFE in accordance with DIN 86044 Series 1/Series 2
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
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