RAR (EC - Fuel Oil Combustion)

Hurricane battery for PM emission control in a 4,000m3/h at 160ºC fuel oil boiler.  

  • This equipment is composed by 8 hurricane cyclones.
  • Emissions: < 10mg/Nm3
RAR, S.A.
Portugal
2005
Hurricane
Numerically optimized cyclones, considering particle agglomeration
Hurricane lines of cyclones are often a solution to reduce fuel oil emissions to under legal emission limits.

Emissions from the furnace can be usually reduced in 75% to 93%, depending on the requirements of the client.

A numerical optimized cyclone for fuel oil combustion is able to reduce emissions under legal emission limits and thereby avoiding the use of bag filters.
  • Very high efficiencies: down to 10-20 % of the emissions of other high efficiency cyclones;
  • Low emissions, ranging from [44-150mg]/Nm3 depending on the boiler, fuel oil quality and Hurricane line of cyclones used.
  • Custom designs (single or parallel arrangement)
  • Low pressure drop: [100 - 150] mm w. g.
  • No temperature restrictions
  • Robust construction with no moving parts
  • Near zero maintenance and downtime costs
  • Very low operating costs
  • Pre-assembled modular system with very easy and fast installation. Batteries of 2, 4, 6 or 8 cyclones are shipped pre-assembled in a supporting structure with or without thermal insulation.
  • Low investment cost
1. Air with fly ash from the boiler or from the pre-separator
2. Hurricane Cyclones. (Batteries of 2, 4, 6 or 8 units )
3. Rotary discharge valve
4. Dust receiver
5. Collected particles
6. Clean air

Note: supporting structure, insulation and ductwork are not represented

For PM emission control in high temperature exhaust streams, such as those from fuel oil boilers, common dedusters like Bag filters, have very high maintenance costs. The diesel and fuel oil fly ash can be quite sticky and clog to filter elements, which can be minimized with costly protection reagents or frequent filter elements changes. Flue gas cooling is needed in front of the filter when temperatures are higher than 200 ºC.


Regular cyclones and multicyclones, if used as final dedusting system, are frequently not able to comply with current emission limits.


Clients' needs include a very high efficient final dedusting system at a reasonable price, robust enough to operate for many years without significant maintenance or operating costs and avoiding production downtime.

Fuel Oil Combustion
Fuel Oil Combustion
Fuel Oil Combustion
Fuel Oil Combustion

Fuel Oil Combustion | General Arrangement


The general arrangement of a fuel oil combustion plant is the use of final dedusting system immediately after the fuel oil boiler.


The Median Volume Diameter (MVD) of the fly ash coming directly from the boiler is typically 7.5µm with 14% under 1µm.


The end stage deduster (either Bag Filter or a Hurricane System, is placed downstream of the pre-separator)