Shallow sand filter industrial high-speed shallow medium sand filter water treatment equipment

Product basic parameters and core structure

1. Shallow sand filter structure: vertical pressure tank body, equipped with water distributor, filter layer, and water collector inside; The tank is equipped with water inlet, water outlet, sanding hole, and maintenance hole to facilitate the loading of filter material and internal maintenance of the equipment.

2. Specification range: Filter unit diameter of 16 inches (400mm) to 96 inches (2400mm), multiple units can be combined in parallel, and the total processing flow can be flexibly adjusted.

3. Filter material selection: Quartz sand is selected as the standard filter material; Activated carbon, anthracite and other filter materials can be replaced as needed to achieve different treatment goals such as turbidity removal, organic matter adsorption, and ion removal.

4. Control mode: supports manual, semi-automatic, and fully automatic backwashing; Backwash can be triggered based on pressure difference or set time, and the backwash duration can be adjusted. The default factory backwash duration is 3 minutes; Optional DCS and PLC control systems, supporting remote communication and centralized management.

5. Core components: The core components are imported with original packaging; The filter element adopts a single gun design to improve backwashing effect and reduce the risk of sand running; The water collector is available in two materials: stainless steel and ABS, which are corrosion-resistant and have a longer service life.

6. Operating logic: Under filtering conditions, water flows through the filter layer from top to bottom, and suspended solids are intercepted by the filter material; Under backwashing conditions, clean water enters the filter layer in reverse from the water collector, flushes and removes impurities from the filter material, and discharges the wastewater. After backwashing is completed, the valve automatically switches back to filtering mode.

7. Material selection: The tank body can be made of carbon steel anti-corrosion or fiberglass material; Internal water collection components can be made of stainless steel ABS， Suitable for clean water, surface water, and mildly corrosive water bodies.

8. Factory inspection: Each tank undergoes pressure sealing testing, the electronic control system completes linkage debugging, and the supporting equipment drawings, operation manuals, and certificates of conformity meet the requirements of engineering bidding and on-site acceptance.

Applicable industries and equipment operating conditions of the product

1. Industrial process water filtration: Process production water purification is used for protecting and filtering nozzles and heat exchange station equipment, intercepting solid impurities in water, preventing nozzle blockage and heat exchanger scaling and wear.

2. Industrial circulating water filtration: widely used in steel, metallurgy, papermaking, power, petrochemical, food, and central air conditioning circulating water systems. As a circulating water side filtration equipment, it continuously reduces the turbidity of circulating water and reduces scaling and corrosion of pipelines and heat exchange equipment.

3. Raw water treatment system: Pre treatment of surface water, river water, river water, lake water, seawater and other water sources to remove suspended solids in the water. It is used as a pre filtration for advanced treatment processes such as reverse osmosis to reduce the load on subsequent membrane systems.

4. Irrigation filtration: Water supply filtration for farmland irrigation, municipal greening, parks, and golf courses, removing sediment and impurities from water sources, protecting drip irrigation and sprinkler irrigation pipelines and nozzles.

5. Aquaculture and leisure water bodies: Aquaculture water purification, swimming pool and water park water circulation filtration, maintain water clarity, and reduce suspended solids content.

Core competitive advantages of the product

1. Modular unit design, flexible expansion: It can operate independently as a single unit, or multiple units can be connected in parallel, and the filtering capacity can be infinitely expanded on the common pipeline, making project phased transformation more convenient.

2. Diversified backwash control: manual, semi-automatic, and fully automatic options are available, supporting differential pressure/time dual triggering, and can be connected to PLC and DCS systems to achieve remote monitoring and adapt to projects of different automation levels.

3. Excellent backwashing performance: The filter element adopts a single gun structure design, with even backwashing water distribution, sufficient flushing of filter material, low sand running rate, reduced filter material loss, and lower consumables costs in the later stage.

4. Reliable quality of core components: The core components are imported with original packaging; The water collector can be made of stainless steel or ABS, which is corrosion resistant, anti-aging and extends the service life of the whole machine.

5. One machine with interchangeable filter media: filling with quartz sand can remove suspended solids and reduce turbidity; Replacing activated carbon and anthracite filter media can adsorb organic matter and some ions, meeting various water quality treatment goals.

6. Simple and convenient operation and maintenance: The tank body is equipped with reserved maintenance holes and sanding ports, making it easy to supplement filter materials and perform internal maintenance operations; The fully automatic version does not require dedicated personnel to continuously monitor.

Frequently Asked Questions (FAQ)

Q1: What is the working principle of shallow sand filter?

A: In the filtered state, pressurized raw water enters the tank and is evenly distributed to the shallow filter layer through the water distributor. Suspended solids in the water are intercepted by the filter material, and the filtered clean water is collected by the bottom collector and flows out. As impurities accumulate in the filter layer, the pressure difference increases; When the pressure difference reaches the set value or the timer reaches the preset time, the system switches to backwash mode. The pressurized water enters the filter layer in reverse through the collector, flushes the filter material, removes and intercepts pollutants, and is discharged with the sewage outlet; After backwashing for at least 2 minutes, the valve automatically switches back to the filtering mode.

Q2: Can filter media be replaced to achieve different treatment goals?

A: Okay. Standard filled quartz sand is used for turbidity removal and suspended particle removal; Replacing activated carbon can adsorb organic matter and color; Anthracite can be used to remove large molecular impurities, and filter media can be selected according to water quality objectives.

Q3: Will the backwashing process interrupt the entire system's water supply?

A: Under the parallel operation of multiple units, when a single unit enters backwashing, the remaining filtering units remain online and the system water supply will not be interrupted; When a single unit equipment is backwashed, the unit stops filtering and is usually installed with a side filter, which does not affect the production water supply of the main pipeline.

Q4: What is the reason for sand running on the device, and can this device reduce sand running?

A: Sand running is mostly due to the water collection structure and uneven backwash water distribution. The shallow sand filter adopts a single gun filter element, with uniform backwash cloth and controllable flushing intensity, effectively reducing sand running rate and minimizing filter material loss

Q5: What categories of water filtration products does your company offer?

A: Our water filtration product system is complete, mainly divided into two categories: water treatment equipment and filter element membrane components. It can meet the full range of industrial water purification, sewage pretreatment, fine filtration, and deep purification requirements in one stop. The equipment category includes: basket filter, hand brush filter, multi-media filter (sand filter/activated carbon filter), precision security filter (bag filter, filter cartridge filter), fully automatic self-cleaning filter, straight through fully automatic sewage filter, multi column automatic backwash filter, shallow sand filter, dosing system (scale inhibition, sterilization, pH adjustment device), dissolved air flotation machine (DAF), plate and frame filter press, reverse osmosis system and other complete water treatment equipment. The filter element and membrane component category includes: 0.1-100 μ m precision PP melt blown filter element, PP folding filter element, wire wound filter element, high flow filter element, PALL, Parker, 3M, Pentair and other imported brand replacement filter elements, as well as core filter elements such as RO reverse osmosis membrane and UF ultrafiltration membrane. The category is complete and suitable for various industrial water treatment projects.