Stainless steel filter tank

Stainless steel filter tank | Corrosion resistant and high strength · Compatible with multiple media/activated carbon/manganese sand

This stainless steel filter tank is welded from high-quality 304 or 316L stainless steel plates. The interior can be filled with various filter media such as quartz sand, activated carbon, manganese sand, anthracite, or multi-media to remove suspended solids, silt, iron, manganese, residual chlorine, color, odor, and some organic matter from water, depending on the water quality requirements. The equipment is designed for high pressure and strong corrosion resistance. It is equipped with a water distribution system, a water collection device, and a manhole for easy loading/unloading of filter media. It can be used with automatic or manual control valves to achieve efficient filtration and backwashing. It is widely used in industrial water treatment, drinking water purification, greywater reuse, swimming pool circulation, and seawater desalination pretreatment.

core components

Stainless steel tank body: Made of SUS304/SUS316L, with longitudinal and circumferential argon arc welding, pickled and passivated or mirror polished, capable of withstanding pressures of 6-10 bar.

Inlet/outlet water distribution device: Bell-mouth or pipe-type water distributor to ensure uniform water distribution and collection, preventing flow deviation.

Manhole: Quick-opening manhole on the top or side for easy filling and replacement of filter media.

Pipeline interfaces: Standard flange or clamp interfaces for connecting to the feed valve, discharge valve, backwash valve, and vent valve.

Optional accessories: Automatic multi-way valve (time/flow type), pressure gauge, sampling valve, sight glass, and differential pressure switch..

Working principle

Filtration Process: Raw water enters from the top of the tank, is evenly distributed by the water distribution device, and then flows downwards through the filter media layer. The filter media removes impurities from the water through interception, adsorption, and sedimentation. The clean water flows out through the bottom collection device.

Backwashing and Regeneration: When the filter media becomes saturated (due to increased pressure difference or timed intervals), the valve is switched to reverse the water flow upwards to flush the filter media, removing trapped impurities from the tank and restoring filtration capacity. After backwashing, the system re-enters the filtration state.

Main advantages

High corrosion resistance: Made of 304/316L stainless steel, suitable for corrosive waters such as acids, alkalis, seawater, and chloride ions, with a service life 3-5 times longer than carbon steel.

High strength and hygiene: High pressure resistance, can be configured with a mirror-finish inner wall, suitable for high hygiene requirements in food, pharmaceutical, and other industries.

Flexible application: Can be filled with functional materials such as quartz sand, activated carbon, manganese sand, anthracite, and resin, making it a multi-purpose tank.

Uniform water distribution: Professional water distribution and collection structure ensures high filter bed utilization and excellent filtration effect.

Easy maintenance: A well-designed top manhole allows for quick material replacement; flange interfaces facilitate on-site pipeline connections.

Automation capability: Can be equipped with automatic control valves (multi-way valves or pneumatic/electric butterfly valve assemblies) to achieve timed or differential pressure automatic backwashing.

Technical parameters

Tank Material: SUS304 / SUS316L

Diameter: Φ300 – Φ3000 (customizable)

Working Pressure: 0.2 – 1.0 MPa

Design Pressure: 1.0 – 1.6 MPa

Working Temperature: 5 – 60℃

Media Types: Quartz sand, activated carbon, manganese sand, KDF, resin, etc.

Connection Type: Flange DN40 – DN300, or clamp (sanitary grade)

Surface Treatment: Matte/brushed outer surface, pickled or mirror polished inner surface (sanitary grade optional)

Application areas

Pretreatment filtration for tap water plants and rural drinking water projects; side-stream filtration for industrial circulating cooling water and greywater reuse; quartz sand/activated carbon filters in pure/ultrapure water pretreatment systems; iron and manganese removal from groundwater (manganese sand filter media); swimming pool circulating water filtration; seawater desalination pretreatment (corrosion-resistant materials). We can provide tank diameter, height, and filter media configuration solutions based on treatment flow rate, water quality requirements, and installation space. Welcome to send your operating parameters for customized design.

Company Profile

AA SS AQUA HITECH CO., LTD. was established in 2005 in Shenzhen, China. It is a leading technology enterprise specialized in the design, manufacturing, installation, commissioning and maintenance of technical solutions for high-difficulty industrial wastewater treatment projects.

Since its establishment, the company has been fully committed to the research of treatment technologies for high-difficulty and refractory industrial wastewater, wastewater recycling and reuse technologies, and wastewater zero-discharge technologies. It strives to achieve low project costs, high outputs and optimization of total social resources.

The water treatment technology solutions and achievements developed by the company have been widely applied in multiple fields of high-difficulty and refractory organic wastewater treatment, including pharmaceutical wastewater, chemical wastewater, pesticide wastewater, laboratory wastewater, coal chemical wastewater, petrochemical wastewater, breeding wastewater, slaughterhouse wastewater, semiconductor wastewater, printing and dyeing wastewater, coating wastewater, landfill leachate, food processing wastewater, mechanical processing wastewater and domestic wastewater.

Adhering to the business philosophy of leading technology, first-class quality and sustainable service, the company endeavors to provide customers with strong technical support and realize the sustainable development and utilization of water resources.

The electrochemical wastewater treatment equipment independently developed and invented by our company can achieve a removal rate of over 99% for COD and ammonia nitrogen in refractory industrial organic wastewater featuring high salinity, high toxicity, high concentration and strong acidity or alkalinity. It has solved the long-standing problem of high-difficulty and complex wastewater treatment in the industrial wastewater treatment industry, representing a significant breakthrough in the treatment scope, methods and effects of high-difficulty and complex industrial wastewater.

CQDHX SERIES EO Electrochemical Advanced Oxidation Technology

Cutting-edge Electrode Manufacturing Technology

Over a 15-year period starting from 2010, we have been dedicated exclusively to the R&D, manufacturing and application of electrodes. Having completed more than 3,000 verification tests on electrode materials and manufacturing processes, as well as over 5,000 experiments on different types of highly complex wastewater, we have tailored the compositions of electrode substrates, surface materials and the deposition conditions of electrode surfaces by integrating the characteristics of various highly complex wastewater types. This has enabled us to achieve optimal performance in treating different categories of highly complex wastewater.

The CQDHX Series Electrode Modules are capable of meeting the requirements for treating highly complex industrial wastewater under extreme conditions. They can effectively remove organic matter (COD), ammonia nitrogen, toxic substances, bacteria, chromaticity, phosphorus and various heavy metals from refractory industrial organic wastewater characterized by high salinity, high toxicity, high concentration and strong acidity or alkalinity.

Working Mechanism of CQDHX SERIES EO Electrode Modules

Electrochemical oxidation is a technology that utilizes an applied electric field to drive chemical reactions for pollutant degradation. Its core reaction occurs at the anode of the electrolytic cell, and the operating mechanisms are primarily categorized into two types: direct oxidation and indirect oxidation, which often function synergistically.

Direct Oxidation Mechanism: Pollutant molecules migrate to and adsorb onto the anode surface. Subsequently, the anode, acting as an electron acceptor, directly extracts electrons from the pollutant molecules, causing their oxidative decomposition. This process is controlled by the mass transfer rate and relies on the catalytic activity and adsorption properties of the anode material, exhibiting a certain degree of selectivity towards different pollutants.

Mechanism of Indirect Oxidation: The anode does not directly oxidize pollutants. Instead, it generates highly oxidizing agents by electrolyzing components within the solution. These agents then diffuse into the bulk solution and carry out homogeneous oxidation of the pollutants. Depending on the type of oxidants generated, the main pathways can be categorized as follows:

Electrochemical oxidation achieves pollutant degradation through two main mechanisms: electron transfer at the anode surface and the in-situ generation of highly oxidizing species. In practical applications, particularly for complex wastewater systems, direct and indirect oxidation often work synergistically. By optimizing electrode materials and process parameters, efficient and advanced treatment of organic pollutants can be achieved.

 Technical Advantages

High Salinity Tolerance: It can effectively remove COD and ammonia nitrogen from unsaturated saline wastewater with a removal rate of up to 99%.

High Toxicity Tolerance: It can effectively remove COD and ammonia nitrogen from highly biotoxic wastewater with a removal rate of up to 99%, while efficiently eliminating the biological toxicity of the wastewater.

High Concentration Tolerance: It can effectively remove COD and ammonia nitrogen from high-concentration organic industrial wastewater with a COD level of ≤ 450,000 mg/L, achieving a removal rate of up to 99%.

Strong Acid-Alkali Tolerance: It can effectively remove COD and ammonia nitrogen from strongly acidic or alkaline wastewater with a pH value ranging from 1 to 11, with a removal rate of up to 99%.

High Safety: The equipment operates at a DC voltage ranging from 3 to 15V, causing no harm to the human body.

No chemical agents are added during wastewater treatment, and no residues or solid wastes are generated.

The electrode modules operate without scaling or clogging.

The equipment achieves a removal rate of 75–100% for high ammonia nitrogen, cyanide breakdown, decolorization, and other pollutants.

No pH adjustment is required for incoming wastewater, which significantly saves on acids, alkalis, labor costs, and floor space, while avoiding secondary pollution.

No water dilution is needed to reduce the salinity of incoming wastewater, decreasing the system’s treatment load and conserving resources.

No water dilution is needed to reduce the COD concentration of incoming wastewater, decreasing the system’s treatment load and conserving resources.

The equipment features a small footprint, occupying approximately 2% of the floor space required by traditional processes of the same capacity.

The equipment has no special environmental requirements and can be installed in well-ventilated, rainproof, non-explosion-proof areas.

The equipment operates with no noise and zero discharge of secondary pollutants.

It features fully automated operation, which is simple, safe, and does not require on-site personnel monitoring.

Equipment Specifications: 0.5T–1000T/h

Electrochemical Oxidation Equipment for Treating Common Pollutants

Application Scenarios:

Treatment of Refractory and Toxic Pharmaceutical Wastewater

Treatment of Refractory and Toxic Chemical Industry Wastewater

Treatment of Refractory and Toxic Pesticide Wastewater

Treatment of Refractory and Toxic Laboratory Wastewater

Treatment of Refractory and Toxic Coal Chemical Industry Wastewater

Treatment of Refractory and Toxic Petrochemical Wastewater

Treatment of Aquaculture Wastewater

Treatment of Slaughterhouse Wastewater

Treatment of Refractory and Toxic Semiconductor Industry Wastewater

Treatment of Refractory and Toxic Dyeing Wastewater

Treatment of Refractory and Toxic Painting/Paint Coating Wastewater

Treatment of Refractory and Toxic Landfill Leachate

Treatment of Food Processing Wastewater

Treatment of Refractory Machining Wastewater

Treatment of Domestic Sewage