Machinery & Plant Sourcing · Asphalt Plants

Asphalt plant baghouse filter

Fabric bag filters that capture dryer dust before exhaust leaves the stack and return the fines to the mix as filler.

Function: Dust collection from dryer exhaust
Cleaning: Pulse jet or reverse air
Bags: Heat-resistant aramid fabric
Dust: Returned to mix as filler

Indicative figures based on manufacturer data. Capacity and specification are confirmed in each offer.

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Matched to your specification. Offers from suitable Turkish manufacturers, compared side by side.

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What is a baghouse filter?

A baghouse is the dust collector of an asphalt plant. Exhaust gas from the dryer, full of fine dust, is drawn by a fan through hundreds of fabric filter bags. Dust stays on the outside of the bags and clean gas leaves through the stack. A pre-separator ahead of the bags removes coarse particles, and the collected fines are returned by screw conveyor to the filler system so they become part of the mix.

How effective is a bag filter?

US EPA emission factors for batch plants show filterable particulate falling from about 32 lb per ton of asphalt uncontrolled to about 0.025 lb per ton with a fabric filter, a reduction of more than 99.9%. That is why bag filters are the standard choice where emission limits apply.

How are the bags cleaned?

Bags are cleaned during operation by short pulses of compressed air or by reverse air flow, which flex the fabric and drop dust into the hoppers. Aramid (Nomex-type) bags are common because they tolerate the high gas temperatures found at asphalt plants.

Key components

Main parts

Pre-separator

Drops out coarse dust before the bag chamber.

Bag chamber and filter bags

Housing with heat-resistant bags on support cages.

Cleaning system

Pulse jet valves or reverse air fan with timer or differential pressure control.

Exhaust fan and stack

Draws gas through the plant; often frequency controlled.

Dust screws and filler return

Carry recovered fines to the filler elevator or silo.

Temperature protection

Fresh-air damper and sensors that protect bags from overheating.

Technical data

Specifications

Typical values from manufacturer documentation. Final figures are confirmed in the manufacturer's offer for your project.

Cleaning	Pulse jet or reverse air
Bag fabric	Aramid (Nomex-type) or equivalent
Pre-collector	Inertial separator or cyclone
Typical PM reduction	More than 99.9% versus uncontrolled (US EPA AP-42)
Size	Matched to dryer gas volume; confirmed per offer

Local emission limits should be shared with your RFQ so the filter can be sized to meet them.

Who it's for

Built for these buyers

Plants facing emission rules

Replace wet scrubbers or old filters to meet limits.

New plant buyers

Size the filter to dryer output and local regulation.

FAQ

Questions buyers ask

What does a baghouse do in an asphalt plant?

It filters dust out of the dryer exhaust before it reaches the stack and returns the collected fines to the mix as filler.

How efficient is an asphalt plant bag filter?

US EPA data for batch plants shows particulate emissions falling from about 32 to about 0.025 lb per ton of asphalt with a fabric filter, more than 99.9% reduction.

What material are asphalt plant filter bags made of?

Usually aramid (Nomex-type) felt, which tolerates the high gas temperatures and the dust of asphalt plants.

How often should filter bags be replaced?

It depends on operating hours, temperature control and cleaning. Rising pressure drop or visible stack dust are signs that bags need inspection. Replacement bags are available through our spare parts line.

Pulse jet or reverse air: which is better?

Both work. Pulse jet systems clean bags with compressed air during operation; reverse air systems use a separate fan and need no compressed air.