Filtre mist folosite la ceteva proiecte, se vand si individual. 82mm

20% (1/2) Moment Cinebloom - 500 lei
1/4 - Mabo Glow - 350 lei

Preturile sunt usor negociabile

Descriere pentru ca OLX crede ca nu sunt suficiente informatii si mi-au suspendat anuntul, asa ca pentru cine se uita si nu are idee ce e acela un filtru mist (ceea ce a fost cazul acum cateva zile) ai aici o descriere:

What is a Mist Filter?
A mist filter—also commonly referred to as a mist eliminator, demister, or coalescing filter—is a specialized filtration device designed to remove fine liquid droplets (mist) from gas or air streams. These droplets may consist of water, oil, chemical solutions, or other fluids depending on the process environment. Mist filters are critical in preventing equipment damage, reducing pollution, ensuring worker safety, and improving process efficiency in a variety of industrial applications.
How It Works
At its core, a mist filter works by intercepting and capturing small droplets suspended in a gas stream, encouraging them to coalesce (combine) into larger droplets that can then drain away due to gravity or be collected.

There are several fundamental mechanisms by which mist filters operate:

Inertial Impaction: Droplets moving with the gas stream have momentum. When the gas changes direction around a fiber or baffle, the droplets can’t follow the sharp turn and impact the filter surface instead.

Interception: As gas flows through a fibrous or mesh medium, droplets that come close to a fiber are captured due to direct contact.

Diffusion: Very fine droplets (1 µm) move erratically due to Brownian motion, increasing the chance of contact with filter media.

Coalescence: Captured droplets merge with others to form larger ones.

Gravity Drainage: Larger droplets are heavy enough to fall and be collected at the bottom of the filter housing or expelled from the system.

Types of Mist Filters
There are several categories of mist filters, each designed for specific types of mist and operating conditions:

1. Mesh Pad Mist Eliminators
Made from layered metal or synthetic mesh (like stainless steel, polypropylene, etc.).

Ideal for removing larger droplets (>5 µm).

Common in gas-liquid separation applications such as in distillation columns or scrubbers.

2. Fiber Bed Coalescing Filters
High-efficiency filters made with densely packed microfibers.

Capture submicron particles and are often used in oil mist filtration.

Often cylindrical and operate with very low gas velocities to allow sufficient time for coalescence.

3. Baffle-Type (Chevron) Mist Eliminators
Use angled plates or vanes to direct gas flow, separating droplets through impaction and centrifugal force.

Suitable for applications where liquid loading is high and maintenance must be minimal.

4. Centrifugal Mist Separators
Use spinning motion to create centrifugal force, flinging droplets outward to be collected.

Effective for high-flow or variable-flow systems.

5. Electrostatic Precipitators
Use electric fields to charge and collect droplets.

More complex and expensive but effective for extremely fine mists or where conventional filters would clog too quickly.

Applications
Mist filters are used across a broad spectrum of industries. Common applications include:

Oil and Gas: Removal of oil mist from compressor discharge, protecting downstream equipment and improving air quality.

Chemical and Petrochemical Plants: Separation of process fluids to prevent contamination or equipment fouling.

Power Generation: Filtration of turbine or generator exhaust.

Food and Beverage: Removing oil mist from frying or cooking processes.

Pharmaceuticals: Protecting cleanrooms by filtering solvents or chemical mists.

HVAC Systems: Removing mist to improve indoor air quality and prevent moisture damage.

Environmental Protection: Used in scrubber systems to reduce pollutants in exhaust streams before venting to the atmosphere.

Design Considerations
When selecting or designing a mist filter, engineers must account for several factors:

Droplet Size Distribution: Smaller droplets require finer filtration (e.g., fiber bed).

Gas Velocity: High velocities reduce residence time and can re-entrain droplets.

Pressure Drop: A lower pressure drop is generally preferable but may trade off with filtration efficiency.

Chemical Compatibility: Materials must withstand corrosive or reactive chemicals in the gas stream.

Temperature and Pressure: High temperatures or pressures require robust, often metallic, materials.

Maintenance and Access: Design should allow for easy cleaning or replacement.

Performance Metrics
Key performance indicators for a mist filter include:

Separation Efficiency: Usually expressed as a percentage—e.g., 99.9% removal of droplets >1 micron.

Pressure Drop: Pressure loss across the filter, typically in inches of water column (in H₂O) or Pascals (Pa).

Capacity: The volumetric flow rate the filter can handle without compromising performance.

Hold-Up Volume: The amount of liquid the filter can store before drainage is required
Maintenance and Troubleshooting
Proper maintenance ensures long filter life and reliable performance. Maintenance tasks include:

Inspection: Checking for clogging, corrosion, or deformation.

Cleaning: Depending on the type, filters may be washed, blown with air, or replaced.

Monitoring Pressure Drop: A rise in pressure drop can signal blockage or saturation.

Drainage System Checks: Ensuring coalesced liquid is effectively removed to prevent re-entrainment.

Common issues include:

Re-entrainment: Coalesced liquid gets pulled back into the gas stream due to high velocity or poor drainage.

Bypass: If the filter is improperly sealed, mist can escape unfiltered.

Chemical Attack: Using incompatible materials can lead to filter degradation or failure.

Conclusion
A mist filter is an essential component in countless industrial systems where the removal of fine liquid droplets from a gas stream is necessary. Whether you're dealing with oil mists in a compressor discharge or acid mists in a chemical scrubber, choosing the right mist eliminator design—along with proper operation and maintenance—can dramatically improve system performance, extend equipment life, reduce emissions, and ensure compliance with environmental and safety regulations.