The Solution
The Solution
TECHNOLOGIES / Bag filters
Particulate removal is an important process step for the product recovery from gas streams as well as for air pollution control. Settling chamber and cyclone de-dedusting systems only use mass-based forces for separating dust and gas. However, if particulate removal needs to be more efficient, bag filters (fabric filters or baghouses) or electrostatic precipitators (ESPs) must be applied. Commonly, cyclones are used as pre-collectors to separate the larger dust particles before the gas enters a fabric filter or ESP.
Bag filters and ESPs can both be used in most dry gas cleaning applications, like power stations, smelting, cement plants and general plant de-dusting etc. Lower emission requirements generally improves the competitiveness of bag filters, and this has helped this equipment to gain relatively higher market shares in some regions where the specific dust from the process has unfavorable characteristics for ESPs.
If the gas temperature can be safely adjusted to less than 250 °C without risking acid dew point problems such as corrosion or sticky dust build-up, using a bag filter for particulate removal is the least costly solution. However, if the gas stream has higher temperatures, de-dusting must occur via a hot ESP designed to withstand peak temperatures. Normal operating temperatures are in the range of 350 to 400°C.
Baletec Bag Filter technology originated initially from the Carter Day technology and was futher developed by the Howden group and then the Lurgi group and subsequently Outotec before it was acquired by Baletec. Bag filters can be applied to all dry gas cleaning applications. Baletec can supply both the traditional high pressure fixed tube pulse jet technology (Baletec HP bag filter) and the high volume low pressure pulse jet with rotating cleaning mechanism (Baletec RF (HVLP) bag filter), which can be the most cost effective solution from small industrial dedusting to the largest process gas flow applications.
Baletec’s High Volume Low Pressure (RF) pulse jet bag filter technology has many technical advantages and will be the most suitable for most applications
Baletec RF (HVLP) Pulse Jet Bag Filter:
The RF (HVLP) Pulse Jet Bag Filter:
The RF Technology has some unique and distinct advantages over other technologies:
√ Easy access to bags using a rotating pulse cleaning system
The Unique Advantages
√ Minimum maintenance requirements with a single pulse valve (integral with air receiver) for up to 1600 bags.
The Circular Bag arrangement
√ Improved gas distribution using a circular bag bundle arrangement.
√ Improved surface area to cross section area using oval shaped bags
The Oval Bags
√ More efficient cleaning of long bags using high volume low pressure cleaning air
√ Low pressure blowers deliver cleaning air at close to process gas temperature
√ A Low maintenance, highly efficient, long bag life option
The Improved Energy Efficiency
The main sustainability advantage of Baletec’s RF (HVLP) bag filters is the use of high volume low pressure pulse cleaning technology instead of conventional high pressure low volume pulses, improving energy efficiency by using blowers instead of compressors (and associated equipment) for the pulse cleaning air supply.
Model Range
Canisters for small gas flows
RF (HVLP) Canister
Gas flows: < 20 m3/s
Standard Modules for Medium Gas flows
RF (HVLP) Standard Compartment Modules.
Gas flows: 15 – 30 m3/s (per compartment)
Scalable Solutions
Baletec Bag Filters are tailor made equipment, designed to fulfill the most stringent technical, environmental and economical requirements under the best technical standards and also only considering all the specifics of the applications.
Scalable Solutions
Pre-engineered bag filters for small to medium gas flow applications are available as road transportable modules for minimal site erection.
Modular Delivery Options
Standard Modular Components
All Baletec bag filters can be delivered as part or fully pre-assembled modules to suit transport and erection constraints.
Part Modules
Full Modules
