China Suppliers Factory Galvanized Steel Frame Box Type Activated Carbon Filter with Aluminum and Stainless Steel
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Application Area
⚙️ Industrial Environmental Protection
- VOC exhaust treatment in spraying, printing, and electronics manufacturing (pre-treatment or core unit)
- Process exhaust purification and deodorization in chemical and pharmaceutical plants
- Fume hood exhaust treatment in laboratories
🏢 Commercial & Civil Use
- Oil fume odor purification in large commercial kitchens (requires integration with grease removal devices)
- Ventilation and deodorization in underground parking garages and sewage treatment stations
- Odor control in food processing plants
🌬️ HVAC Systems
- Fresh air purification in high-end office buildings, hospitals, museums, and airports
- Improving Indoor Air Quality (IAQ)
- Removing outdoor ozone, vehicle exhaust, or indoor decoration pollution
📍 Special Locations
- Airport smoking rooms
- Animal housing facilities
- Waste transfer stations
- High-intensity odor control environments
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Filter Media Materials
We have 3 types of Carbon Activated Media to meet your needs:
A
Type A
VOC And Ozone, Etc.
B
Type B
Acidic Gases
(SO₂, NO₂, H₂S, HCL, HF, Etc.)
(SO₂, NO₂, H₂S, HCL, HF, Etc.)
C
Type C
Alkaline Gases
(NH₃, Amines, Etc.)
(NH₃, Amines, Etc.)
Activated carbon is the core of the filter, and its type and quality directly determine the filtration performance.
⭐ Key Features & Advantages
- High Efficiency & Broad-Spectrum: Effectively removes various VOCs, odors, acidic/alkaline gases, and some inorganic gases.
- Simple Structure: Easy to install, maintain, and replace.
- Moderate Air Resistance: A well-designed box balances adsorption efficiency with system pressure drop.
- Flexible Customization: Box dimensions, carbon bed thickness, activated carbon type, and fill volume can be customized based on air volume, pollutant concentration, and treatment requirements.
- Cost-Effective: A relatively economical option for treating medium-to-low concentration, high-volume exhaust gases.
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Core Structure and Components
📦 Box (Casing)
Typically made of carbon steel, stainless steel, or corrosion-resistant PP plastic to ensure structural strength and sealing. Usually a rectangular prism shape with flanges for easy connection to ductwork (inlet and outlet).
💨 Airflow Distribution & Support Structure
Front Flow Distribution Screen/Plate ensures air flows evenly through the carbon bed, preventing "channeling" and maximizing the use of all carbon. Support Screen/Plate prevents fine activated carbon particles from being carried out by the air stream.
🚪 Access Door / Port
Facilitates the replacement of saturated activated carbon media.
🛡️ Pre-Filter (Upstream)
A primary or medium-efficiency filter installed upstream to first remove dust and particles. This prevents clogging of the activated carbon micropores and significantly extends its service life.
Galvanized Steel Frame Box Type Activated Carbon Filter
Box-Type Activated Carbon Filter
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Activated Carbon Media Layer
Media Types:
⚫ Granular Carbon
Most common type. Strong adsorption capacity with adjustable packing density.
🔷 Honeycomb Carbon (Block Carbon)
Low-pressure drop, suitable for high air volume applications.
🧵 Activated Carbon Fiber Felt/Cloth
Fast adsorption speed, often used in composite filter elements.
Carbon Type Selection: Chosen based on target pollutants (e.g., coconut shell carbon, coal-based carbon, impregnated carbon). For example, acid-impregnated carbon is specifically used to treat alkaline gases like ammonia and amines.
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Technical Parameters
Remarks: (1) Initial resistance tolerance of ±10% (2) Support customer size
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Frequently Asked Questions (FAQ)
Q1
What types of pollutants can a box-type activated carbon filter remove?
Box-type activated carbon filters can effectively remove a wide range of pollutants including VOCs (volatile organic compounds), odors, acidic gases (such as SO₂, NO₂, H₂S, HCl, HF), alkaline gases (such as NH₃ and amines), ozone, and some inorganic gases. The specific performance depends on the type of activated carbon media selected.
Q2
How do I choose the right carbon media type (A, B, or C) for my application?
Type A is designed for VOCs and ozone removal, making it ideal for spraying, printing, and electronics industries. Type B targets acidic gases (SO₂, NO₂, H₂S, HCl, HF) and is suited for chemical or pharmaceutical plant exhaust. Type C is formulated for alkaline gases such as ammonia and amines, commonly found in food processing or animal housing facilities. Selecting the correct type ensures maximum filtration efficiency.
Q3
How often does the activated carbon media need to be replaced?
The replacement frequency depends on the pollutant concentration, air volume, and the type of carbon used. In general, it is recommended to inspect the media every 3–6 months. When the filter no longer effectively reduces odors or pollutant levels, or when the pressure drop increases noticeably, it is time to replace the carbon. Installing a pre-filter upstream can significantly extend the carbon media's service life.
Q4
Can the box dimensions and carbon bed thickness be customized?
Yes. The box dimensions, carbon bed thickness, activated carbon type, and fill volume can all be fully customized based on your specific air volume, pollutant concentration, and treatment requirements. This flexibility makes box-type activated carbon filters suitable for a wide range of industrial and commercial applications.
Q5
What materials are available for the filter box casing?
The box casing is typically available in carbon steel, stainless steel, or corrosion-resistant PP (polypropylene) plastic. The choice of material depends on the chemical nature of the exhaust gas, operating environment, and budget. Stainless steel and PP are recommended for highly corrosive environments such as chemical or pharmaceutical plants.
Q6
Is a pre-filter necessary when using a box-type activated carbon filter?
While not always mandatory, installing a primary or medium-efficiency pre-filter upstream is strongly recommended. The pre-filter removes dust and particulate matter from the air stream before it reaches the activated carbon, preventing the micropores from clogging prematurely. This simple addition can significantly extend the service life of the carbon media and improve overall system performance.