Structural analysis of shallow sand filter The shallow sand filter mainly consists of a filtering tank, a sand filter layer, a water distribution system, a water collection system, a backwash device, and a control system. ​ Filter tank: High strength and corrosion-resistant materials such as fiberglass and carbon steel lining are usually used to create a stable and enclosed space environment for the entire filtration process, withstand fluid pressure and chemical erosion, and ensure long-term reliable operation of the equipment. ​ Sand filter layer: As the core filtration medium, high-quality quartz sand is selected, and different particle size levels are finely laid according to the filtration target, forming a gradient distribution from coarse to fine. This structure is like a precise three-dimensional filter, which can efficiently intercept coarse particles and impurities, and capture fine suspended solids through the tiny pores between sand particles, achieving a multi-level filtration effect. ​ Water distribution system: located at the top of the tank, exquisitely designed, with a special structure to evenly distribute the incoming water to the surface of the sand filter layer, ensuring that every inch of the sand filter area can fully contact the fluid to be filtered, avoiding water flow short circuits, and achieving maximum filtration efficiency. ​ Water collection system: installed at the bottom of the tank, responsible for collecting and exporting filtered clean water in an orderly manner. Its structure takes into account the smoothness and uniformity of water flow, preventing local negative pressure or turbulence from affecting the filtration quality. ​ Backwash device: composed of a backwash water pump, an air pump (partially configured), pipelines, and valves. When the filtering resistance reaches the threshold, the device is activated, and with the help of reverse water flow or a combination of air and water, the sand filter becomes laminar, strongly stripping off attached impurities and achieving self-cleaning of the filter. ​ Control system: Integrated intelligent control module, real-time monitoring of key parameters such as inlet and outlet pressure difference, flow rate, and operating time, precise regulation of backwash cycle, duration, and intensity according to preset programs, ensuring equipment automation and precise operation.

Shallow sand filter for condensate filtration from China LEFILTER factory

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1. Basic Definition Shallow sand filter is a pressure-type mechanical filtration device with quartz sand as the filtration medium, which is specially used to remove impurities such as suspended matter, colloids, particles, etc. in liquid. In condensate treatment, it is mainly used to purify the recovered steam condensate, remove pollutants such as rust, silt, microorganisms, …

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