80T River Water Treatment Equipment

River water purificationequipmentIntroduction to the Process of River Water Treatment Equipment and Surface Water Treatment Equipment

The treatment of river water depends on the water quality of the river (lake water), whether to first precipitate and then undergo mechanical filtration and activated carbon filtration. Precision processing technology.

1、mechanical filter

Filters usually have main equipment such as water inlet devices, water distribution systems, and sometimes devices for introducing compressed air. There are various necessary pipelines and valves outside the filter. Mechanical filters are commonly made of fiberglass, stainless steel, and carbon steel lined with anti-corrosion coatings for tank bodies. Common filter media include quartz sand, marble, anthracite, manganese sand, and dolomite, with particle diameters of approximately0.5-1.5between. The filter can be filled with one type of packing, as well as two or three types of packing.

filterThe operation is periodic, and each cycle can be divided into three steps: filtering, backwashing, and backwashing.

The purpose of backwashing is to remove the accumulated dirt in the filter layer and restore its ability to intercept dirt. It is an important step in the operation of the filter. In order to achieve good backwashing effect, compressed air is usually introduced during backwashing.

The operating flow rate of a regular filter is approximately8～10m/hWhen the pressure drop of the water flow through the filter layer reaches the allowable limit, stop the filtration operation and start backwashing. At this point, discharge the water inside the filter to the upper edge of the filter layer, and then send it into the filter with a strength of18-25L/（m².S）Compressed air for blowing and washing3～5minAfterwards, while continuing to supply air, backwash water should be fed into the filter with a strength that causes the expansion rate of the filter layer to reach approximately40%～50%Finally, rinse with water until the effluent is qualified before starting the formal filtration operation.

This type of filter, in addition to determining whether it needs to be cleaned based on the pressure drop of water passing through the filter layer, can also be cleaned according to a certain operating time. The allowed operating cycle should be determined through adjustment testing. Filters should not be cleaned frequently when suspended solids are about to pass through. They should be cleaned slightly in advance, otherwise the filter layer will not be easy to clean, and over time, it will cause clumping of the filter material. Generally, the allowable pressure drop is about0.5bar.

2、Activated carbon filter

Activated carbon filters are mainly used to remove organic matter and residual chlorine from water, as well as to remove odors, color, etc. Usually, high-quality fruit shells should be used first for activated carbon to ensure good mechanical strength, fast adsorption speed, and large adsorption capacity. Activated carbon has a dual function: firstly, adsorption; The second is filtration. Activated carbon has a large number of functional groups such as hydroxyl and hydroxyl groups on its surface, which can chemically adsorb various types of organic substances, as well as electrostatic attraction. Therefore, activated carbon can remove organic substances such as humic acid, fulvic acid, and essential sulfonic acid from water; Organic pollutants (such as phenolic compounds); It can also remove residual oxidants, free residual chlorine, odors, harmful gases, etc. from water. Activated carbon is also good Remove heavy metal ions from water, such as those in waterHgTheCdandCrWait.

The operating flow rate of activated carbon filters is generally10-20m/h.

Due to the porous structure of the filter material inside the activated carbon filter and the nutrient rich organic matter adsorbed by the activated carbon, it provides a breeding environment for bacteria. Therefore, the activated carbon filter needs to be regularly sterilized or chemically treated.

Backwashing method: using a combination of air and water for backwashing, with a backwashing intensity of0.5m³/（m².s）The backwash time is10-15min(or backwash flow rate)20-30m/hBackwash time4-10min，3-6After backwashing once, the expansion rate of the filter layer is30%-50%）.

The service life of activated carbon is generally2-3In the year, saturated carbon can be regenerated or replaced. The newly loaded activated carbon must first be soaked in water24For more than an hour, fully wet it, remove the air in the carbon particles and their internal pores, so that the carbon material does not float on the water, then seal the manhole, test the pressure, and wash it in the right direction to wash away the anthracite dust in the activated carbon. After washing until the water is transparent, colorless, and free of fine particles, it can be put into use.

3、Precision filter (microfiltration)

Also commonly known as a security filter, it is often used as the last pre-treatment device before reverse osmosis (nanofiltration) systems.

Precision filters use molded filter materials such as filter cloth, filter screen, filter sheet, and filter membrane Filter element, the filter of precision filter is determined according to different filter materials and the filtration accuracy of filter materials, generally0.01-1µm；5-20µm；20-100µm；

Precision filters are often placed after pressure filters To remove turbidity0.4NTUThe following small particles are used to meet the requirements for water inflow in subsequent processes. Sometimes it is also set at the end of the entire water treatment system to prevent small particles from flowing into the finished water.

The filter material (filter element) of a precision filter is a consumable material, and when the working pressure difference reaches0.1MpaIt needs to be replaced.

More information search:http://www.water-sy.comHaiyuan Water Treatment Company welcomes your call!

Telephone consultation:/