Technical Introduction
Product Introduction
Dual-Media Filter (Dual-Medium Filter)
The dual-medium filter is a type of filter that can be used for both clean water and wastewater treatment, making it highly suitable for fine filtration of oilfield and refinery wastewater. This filter uses anthracite, emery, and other filter media, employing different filter media combinations based on various water treatment requirements. During filtration, oily wastewater flows through the filter bed from top to bottom, where oil and suspended solids are intercepted and removed through backwash.
The filter media employs air-water backwash to ensure excellent regeneration effects. This product features compact structure, complete supporting facilities, stable operation, simple operation, thorough backwash, and easy maintenance. It is widely used in oily wastewater treatment in oilfields, and also suitable for deep treatment of industrial wastewater in metallurgy, chemical, textile, and other industries.
Product Parameters
Product Specifications
| Parameter | Performance Specification | Parameter | Performance Specification |
|---|---|---|---|
| Single Unit Capacity (m³/h) | 5 ~ 150 | Filtration Resistance (MPa) | ≤ 0.12 |
| Design Pressure (MPa) | 0.6 ~ 2.0 | Backwash Water Intensity (L/m²·s) | ~ 15 |
| Design Temperature (℃) | ~ 80 | Air Wash Intensity (L/m²·s) | ~ 20 |
| Influent Oil Content (mg/L) | ≤ 50 | Effluent Oil Content (mg/L) | ≤ 5 |
| Influent Suspended Solids (mg/L) | ≤ 50 | Effluent Suspended Solids (mg/L) | ≤ 5 |
| Suspended Solids Removal Efficiency | 98% | Removable Particle Size | ≥ 2 μm |
Technical Advantages
Technical Advantages
High Filtration Precision
Removes suspended solids with particle sizes ≥2 micrometers, with removal efficiency up to 98%, providing excellent effluent water quality
Dual-Medium Gradation
Dual-layer filter media of anthracite and emery forms a coarse-to-fine gradation structure, fully utilizing the pollutant-holding capacity of the entire filter bed
Combined Air-Water Backwash
Uses combined air-water backwash process with excellent filter media regeneration effect, thorough backwash, and rapid recovery of filtration performance
Flexible Series/Parallel Operation
Equipment can be connected in series or parallel based on processing capacity requirements, flexibly adapting to wastewater treatment systems of various scales
Automated Control
Supports fully automatic operation with on-site or remote control capabilities, reducing manual intervention with stable and reliable performance
Compact Structure
Compact overall structure with complete supporting facilities, small footprint, suitable for renovation and expansion projects with limited space
Simple Operation and Maintenance
Easy equipment operation, simple backwash, minimal maintenance workload, low operating costs, and excellent overall economy
Wide Applicability
Suitable for oily wastewater treatment in oilfields and refineries, also suitable for deep treatment of industrial wastewater in metallurgy, chemical, textile, and other industries
Technology Comparison
Technology Comparison
| Comparison Item | Single-Layer Media Filter | Dual-Media Filter |
|---|---|---|
| Filter Media Structure | Single medium, uniform particle size | Dual-layer gradation (anthracite + emery), coarse-fine layering |
| Filter Bed Utilization | Mainly relies on top-layer interception, low deep-layer utilization | Entire filter bed effectively intercepts pollutants, significantly increased capacity |
| Suspended Solids Removal Efficiency | 70~85% | 98%, significantly improved removal efficiency |
| Removable Particle Size | > 5 μm | ≥ 2 μm, efficient removal of finer particles |
| Backwash Method | Single water backwash | Combined air-water backwash, thorough regeneration, better effect |
| Operation Mode | Some require manual operation | Fully automatic operation, supports on-site and remote control |
| Connection Method | Usually operates as single independent unit | Supports series or parallel connection, flexible expansion |
| Application Range | Limited applicable media range | Suitable for clean water/wastewater, widely used across industries |
| Effluent Oil Content | 5~15 mg/L | ≤ 5 mg/L, superior effluent water quality |
| Maintenance Complexity | Poor backwash effect, high maintenance frequency | Simple maintenance, low operating and maintenance costs |
Application Cases
Application Cases
Oilfield Oily Wastewater Treatment Project
Typical industrial application of dual-media filter in fine filtration of oilfield produced water, with effluent suspended solids ≤5mg/L
Refinery Wastewater Deep Treatment System
Dual-media filter applied in deep treatment of refinery oily wastewater, operating in conjunction with front-end oil removal equipment, achieving excellent overall treatment results
