Initial Rainwater Fiber Disc Filter

I. Product Overview

The Initial Rainwater Filtration System is a high-efficiency filtration device developed for the characteristics of initial rainwater, including high pollution load, large water volume fluctuations, and complex composition (containing sediment, oil, debris, etc.). Its core function is to rapidly remove suspended solids (SS), colloids, oils, and organic matter from initial rainwater through physical interception by customized fiber filter cloths. This reduces the load on subsequent treatment units and prevents direct discharge pollution to receiving water bodies (rivers, lakes). The system emphasizes "shock resistance, strong interception, and easy maintenance," adapting to sudden flow peaks and pollutant variations in initial rainwater without complex pretreatment. Designed for urban roads, industrial zones, and commercial areas, it is a critical equipment for sponge city construction and non-point source pollution control.

II. Working Principles

1. Impact Buffering and Pretreatment Stage

   Collected rainwater first enters a front buffer tank, where coarse floating debris (e.g., branches, plastic bottles) is intercepted by a grating (5-10mm aperture) to protect filter cloths. The buffer tank temporarily stores peak flows, stabilizing filtration.

2. High-Efficiency Filtration Stage

   Buffered rainwater flows via gravity into the filter tank. Water permeates from the outer to inner side of the filter cloth, efficiently intercepting sediment (≥10μm), oil-bound particles, and colloids. During filtration, the rotating disc remains stationary, allowing coarse particles settled by gravity to fall into the bottom sludge hopper, reducing filter cloth load.

3. Adaptive Backwashing Stage

   Raw water enters the main tank, flowing through the filter cloth via gravity. Treated water exits through the filter disc and central pipe for discharge or reuse. As suspended solids accumulate on the cloth surface, filtration rate slows, raising water levels. When levels reach a preset threshold or after a set runtime, a negative-pressure backwashing program activates. The filter disc rotates slowly, and contaminants are thoroughly removed without interrupting filtration.

4. Emergency Sludge Discharge Design

   The bottom sludge hopper has a slope ≥60°, with pneumatic valves timed (or triggered by liquid levels) to discharge coarse sediment rapidly, preventing secondary pollution from accumulation.

III. Technical Parameters

IV. Product Features

1. Strong Shock Resistance

   Withstands SS fluctuations (50-1000mg/L) during rainfall. Buffer tank + overload filtration design ensures effluent SS <30mg/L, resolving "run-through" issues in traditional filters.

2. Targeted Interception of Complex Pollutants

   Effectively removes sediment (≥10μm), road oil (emulsified/free), and tire debris, preventing black-odor water bodies or eutrophication.

3. Adaptive to Intermittent Operation

   Auto-starts with rainfall; dormant during dry periods. No manual intervention required.

4. Flexible Installation & Compact Design

   Modular units fit narrow spaces (e.g., roadside green belts, parking lots). Minimal civil work required, ideal for urban retrofits.

5. Low Maintenance Costs

   Durable filter cloths (≥2-year lifespan); simple backwash system (≤30 min/day maintenance); low energy consumption (≤2.2kW per module).

V. Applications

1. Urban Roads

   Filters sediment, oil, and dust from road runoff, preventing river pollution.

2. Industrial Parks

   Pretreats factory runoff (containing spills, wash water), reducing biochemical load on wastewater plants.

3. Commercial & Residential Areas

   Purifies parking lot/plaza runoff for irrigation or landscape reuse, enabling rainwater resourceization.

4. Sponge City Integration

   Serves as end-filtration for bio-retention facilities (e.g., sunken gardens), enhancing infiltration/reuse safety.

5. Airports/Ports

   Treats runoff from runways/docks (containing jet fuel, cargo dust), meeting strict water protection standards.

This system addresses the core challenges of initial rainwater pollution (heavy load, volatility, treatment difficulty) through scenario-optimized design, delivering efficient purification and easy O&M. It provides a cost-effective solution for urban non-point source pollution control and rainwater management.

VI. Why Choose Us?

As a professional rainwater filtration system manufacturer, we have many years of experience in primary rainwater treatment, providing customers with efficient, stable, and economical solutions. The key advantages of choosing us are as follows:

1. Industry-Leading R&D Capabilities

   We have an in-house R&D team focused on innovation in primary rainwater filtration technology. By optimizing filter cloth materials, improving backwash procedures, and adopting a modular design, our rainwater filtration system leads the industry in filtration efficiency, impact resistance, and durability.

2. Efficient and Stable Purification Performance

   The system is designed for high load, complex composition, and large flow fluctuations of primary rainwater. The filter cloth effectively removes suspended solids (SS), colloids, oils, and road pollutants, resulting in stable and reliable effluent quality, ensuring safe downstream discharge or reuse.

3. Extensive Project Experience

   As an experienced rainwater filtration system supplier, we have provided customized solutions for a variety of scenarios, including urban roads, industrial parks, commercial areas, airports, and ports. Each project undergoes rigorous testing and optimization to ensure efficient system operation in diverse environments. 

4. Comprehensive After-Sales Service

   We provide comprehensive support from model selection, design, installation, and commissioning, ensuring easy system adoption and efficient system operation. Furthermore, the system features simple maintenance, long filter cloth life, and automated backwashing, minimizing daily maintenance time and reducing operational costs.

5. Flexible Customization and Modular Design

   We offer a variety of modular units to accommodate diverse site constraints and treatment requirements. Whether it's a narrow roadside green belt or a rainwater system for a large industrial park, these units can be flexibly configured to meet specific needs, achieving efficient purification and resource reuse.

6. Environmental Protection and Energy Saving

   The system design fully incorporates energy conservation and emission reduction, featuring durable filter cloth, low energy consumption, and efficient backwashing. Choosing us not only ensures a high-performance filtration system but also reduces operating costs and achieves green and sustainable management.

   As a professional rainwater filtration system manufacturer, we provide customized primary rainwater filtration solutions for customers worldwide. For more technical details, case studies, or a quote, please contact our sales team. We will provide professional consultation and efficient service to help your rainwater treatment project succeed.