Fully Automatic Control Water Filter Device High Precision Wastewater Purifier

Machine filtering is to use one or several filter medium, under the pressure of certain, make through the medium, bioburden remove impurities, get filtrate, so as to achieve the purpose of filter. Inside pack packing is commonly: Quartz sand, anthracite, particle porous ceramics, manganese sand etc, user can choose according to the actual situation of use.

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Machine filtering is widely applied in water treatment process, mainly used in water treatment except turbid, reverse osmosis and ion exchange soften the desalination system preamp pretreatment, also can used for surface water and groundwater except sediment. Fill turbidity requirements less than 20 degrees, effluent turbidity up to 3 degrees Celsius.

Principle

Tap water enters the inlet filter through the distribution water tank and is filtered from top to bottom. As the filter layer continuously traps suspended solids in the incoming water, the water head loss of the filter layer gradually increases, causing the siphon to rise and the water level in the pipe flushing system to rise.

When the water level rises into the water ejector within the siphon auxiliary pipe, the hydraulic action carries away the air in the siphon tube, creating a negative pressure. When the negative pressure reaches the design value, the siphon phenomenon occurs, allowing the water in the tank to backwash from bottom to top and be "regenerated".

 As the filter layer is continuously backwashed, when the water level in the tank drops to the specified value, the siphon action is broken, the backwash ends, and the filtration device resumes operation.

Application:

The fully automatic filtration device is mainly used to remove particulate impurities, suspended solids, and filterable solids that can form adsorptive sedimentation in water, providing industrial and domestic water that meets various purposes.

1. Used for side filtration of circulating cooling water in petrochemical, chemical, metallurgical, electric power, refining, light industry, and textile industries;
2. Used for surface water purification and removal of iron and manganese from groundwater;
3. Used for the filtration treatment of municipal and township tap water plants;
4. Used as pre-treatment for softening and desalination processes;
5. Used for purification of swimming pool and fountain water features;
6. Used for the removal of suspended solids from industrial wastewater, subsequent filtration after biochemical treatment of organic wastewater and secondary sedimentation tank treatment;

Working Principle

The working principle of the multi-media filter mainly involves the selection of the filter medium, the filling method, and the physical and chemical effects in the filtration process. Here's how it works in detail:

1. Selection and filling of filter media
Multi-media filters use one or more filter media, such as quartz sand, activated carbon, manganese sand, etc. These filter media have different mechanical strength, chemical stability and adsorption capacity, can effectively remove suspended impurities in water  The filling method of the filter material is usually arranged in layers according to the specific gravity and particle size, such as the anthracite with small specific gravity is placed on the upper layer of the filter bed, the quartz sand with moderate specific gravity is placed on the middle layer, and the heavier gravel is placed on the bottom layer. This design can ensure that the filter in the backwash does not occur when the phenomenon of disorderly layer, Thus, the retention capacity of the filter material is ensured.

2. Physical effects in the filtration process
When the raw water passes through the multi-media filter, the suspended matter in the water is trapped on the surface of the filter layer due to adsorption and mechanical choke. When the water flows into the middle of the filter layer, because the sand particles in the filter material layer are arranged more closely, the particles in the water have more opportunities to collide with the sand, so that the flocculant, suspended matter and the surface of the sand stick to each other, and the impurities in the water are trapped in the filter material layer, so as to obtain the clarified water quality.

3. Chemical action in the filtration process
Although the main role of the multi-media filter is to remove suspended impurities in the water through physical retention, it can also remove some organic substances, heterochromatic substances and odorous substances in the water to a certain extent. This is mainly due to the adsorption capacity of activated carbon and other filter materials.

Features

1. This device is the earliest domestic filter device that operates automatically using the siphon principle without valves (only inlets, outlets, and drain valves) and control instruments. Compared with traditional filtration equipment, it has the advantages of no manual operation, no energy consumption, low operating costs, safety and reliability, and convenient management;

2. The device does not have an external backwash water pump or water tower. Inlet, outlet, backwash and sewage discharge do not require operating valves or corresponding electrical control facilities, thereby saving construction of the pump room and a large number of electrical control instruments and equipment, does not require dedicated operators, and has low operating costs;

3. Saves raw water, has high water production, and water utilisation rate ≥97%; 

4. No backwash facilities are set, and the working water head is low (0.06MPa);

5. Simple structure, no supporting facilities, smaller volume compared with valve-free filters, reduced footprint, no special plant requirements, thereby saving on infrastructure investment, auxiliary facilities, and installation costs;

6. Integrated equipment with water distribution tank, filter, U-shaped inlet pipe, siphon pipe, and drainage tank all built-in. The appearance is more aesthetic than valve-free filters, with a compact structure. The user only needs to prepare the equipment foundation and connect the inlet and outlet pipes as required to put it into operation;

7. The equipment is made of carbon steel (or as required by the user), strictly corrosion-resistant, with high processing accuracy, and easy installation