Self-Cleaning Water Purifier

I. Overview
The self-cleaning water purifier incorporates technology from institutions such as the Southwest Municipal Engineering Design Institute of China. It integrates advanced water treatment technologies and combines the advantages of similar products, featuring optimized design and configuration for processes including mixing, reaction, sedimentation, filtration, and filter media backwashing. It is suitable for treating high, medium, and low turbidity water from rivers, lakes, and streams across the country.
Due to its compact size, small footprint, low investment, quick installation, energy efficiency, and ease of management, it can effectively treat raw water with turbidity as low as below 100 mg/L or as high as 3,000 mg/L (temporarily up to 6,000 mg/L), producing treated water with turbidity below 5 mg/L. As a result, it has become the most popular water purification equipment for rural areas, towns, small and medium-sized industrial and mining enterprises, construction sites, field work units, and military barracks.
II. Working Principle and Structure
Raw water undergoes mixing, reaction, sedimentation, and filtration to achieve a turbidity of less than 5 mg/L. Mixing is accomplished externally by adding coagulants to the suction pipe of the water pump, utilizing the pump for thorough mixing. The mixed raw water is then sent into the purifier for treatment. The purifier includes: 1. Reaction, sedimentation, and filtration zones; 2. A sludge concentration zone equipped with a forced outlet pipe, which discharges 20% of the equipment’s rated flow. This zone enhances sludge concentration, extends sludge discharge cycles, and reduces water consumption for sludge discharge to achieve energy-saving purposes; 3. A backwash water tank for automatic filter backwashing.
III. Main Technical Specifications
1. Raw water turbidity: ≤3,000 mg/L (temporarily up to 6,000 mg/L)
2. Treated water turbidity: <5 mg/L 3. Inlet pressure: >0.06 MPa

3. When the water source is close to the water plant, the intake pump house can be combined with the delivery pump house. When the water source is far from the water plant, the intake and purification facilities are built separately, with the layout tailored to local conditions.
4. Chemicals are added to the suction pipe before the pump, using polyaluminum chloride (low corrosiveness). Disinfection is performed with bleaching powder or liquid chlorine, added at the inlet of the clear water tank.
5. The purifier foundation can be constructed with plain concrete, with a solid ground treatment. The foundation should be 100 mm above ground level. The water seal trough is brick-built, with the trough top 200 mm above the weir opening. Dimensions are determined by the designer.
6. If the sludge or sand discharge pipes become clogged, they can be periodically backflushed using the water supply pipe.

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