Moneypoint/Ireland
Fabric filter
Fabric filters are mainly used for dust collection purposes, but they also serve for the adsorption or the absorption of partially gaseous pollutants e.g. SO2, HCI, HF as well as heavy metals and polychlorinated hydrocarbons.
The fabric filter is virtually not affected by most of the critical ESP influence factors and is able to maintain lowest ash emissions under changing coal and ash qualities. AE&E can rely on the experience from over 250 installations worldwide.
High pressure pulse jet fabric (HPPJF) filters
The high pressure pulse jet fabric filter is typically applied for smaller gas volumes. The dust-laden gases pass from outside the filter bags through to the inside. The dust, which is deposited, is removed from the precipitator surface by suddenly inflating the bags with pulses of compressed air. The dust cake falls into the filter hopper as an agglomerate. The fabric filters are designed with multiple compartments, so that the plant sections can be separated from the gas stream for inspection and maintenance purposes or for bag replacements during the operation of the plant.
Low pressure pulse jet fabric (LPPJF) filters
The low pressure pulse jet fabric filter is mainly designed for the handling of large volume flows ranging from approx. 50,000 m³/h to several millions m³/h. The characteristic feature of the low-pressure pulse jet technology is the low scavenging air reservoir pressure, which is below 1 bar, whereas conventional systems operate at pressures ranging from 2 to 7 bar. Therefore, much less mechanical energy is required, and the quantity of primary energy required for the cleaning process is far lower.
Key features low pressure pulse jetfabric (LPPJF) filters
- Less space required compared to HPPJF-filter due to densely packed bag arrangement
- Long bag life
- Low energy consumption due to low pressure pulse jet of 0.5 –0.7 bar
- No adverse impact from JouleThomson effect
- Quick bag replacement
- Small number of diaphragm valves, pulse piping minimised
- Modular construction that can be easily maintained
- High collection efficiencies (collection efficiencies over 99.99% can be reached)
- High plant availability
- Low maintenance costs