Automatic Back Wash Multi-media Sand Filter

Automatic back flush industrial sand filter is usually called depth filters, water flows through a certain thickness, media layer with a certain particles size, then reached the filtering effect .The media may be quartz sand ,gravel or granular materials. filtration level depends on the particles diameter and flow speed through filter bed. INOCO provides a series of various forms of such product sand accessories,can also provide control system for using single or multiple parallel situation, INOCO is willing to offer you the products design ,perfect system and help you select filter media such as sand ,quartz sand ,activated carbon and multilayer media.

1. higher filtration flow speed. the fastest can reach 35m/h, larger drain capacity and longer work period,suit for large water capacity industrial water and low suspended solid content. 

2.Generally the turbidity is below 1 mg/L for after-treated water. At the same time, partly eliminate the organic matter, bacteria and chroma. Meet bruises requirements in water of suspended solid content.

3.Use sand for filter media, simple device structure, easily operate and maintenance.

4.After the filter layer failure, you can use the method of backwash water(water wash filter layer from the bottom to up, please see below pc),then restore the filtration ability.

5. Sand material widely distributed, easily produce and low cost.

6. We are manufacturer equipped with a strong team and profession engineers who have rich experience.   also supply best filtration solution for you.

7. We always change and wish the best service for you, we have 25000 customers all over the world. such as Thailand, Korea, Vietnam, USA and so on.

 Note:Medium filter device prizing

 YNT can provide medium filter device prizing, it is convenient for loading and unloading, also it will save installation cost and labor cost.   

I. MULTI-MEDIA SAND FILTER

Multi-media filter (filter bed), that is adopted two or more material as filter media , in industries water recycling system treatment, remove impurities in waste water, adsorb oil and so on. Let water quality meet recycling requirement. Main use for filtering is removing suspended or colloidal impurities in water. Especially effectively remove tiny particles and bacteria that precipitation technique can’t do. Also it has removal effect for BOD5 and COD to some extent.

Multi-media sand filter selection

By control type, it divided into manual and automatic. Manual type mainly control filter’s operation, wash, backwash by adjustment of valve. While Automatic type is by LCD intelligent programmable controller. According to tank’s material, it divides into glass fiber reinforced plastics tank, carbon steel tank, stainless steel tank. Tank inner wall can be coated epoxy and rubber lining anticorrosion.

Multi-media sand filter technics data:

 II.SHALLOW MEDIUM FILTER

 Automatic shallow sand filtration system consists of multiple standard high speed cylinder units, water flow through internal water distribution and water collection. Remove efficiently particulate matter and reduce turbidity. If filled with particular filter material, such as activated carbon, hard coal and so on, it also can get rid of corresponding organic adsorption, ion, etc.

Product advantages:

1. small volume, easily install, save space, can be installed outdoor, no need to build house and save construction cost.

2. good anticorrosion performance, long service life.

3. large flow capacity, good filter performance

4. automatic backwash

5. continuously supply water, when machine back wash, filter process go on while water supply as usual.

6.use special water distribution and water collection

7. low operating cost for long period, save electric, water and maintenance cost.

 Working principle:

II.wash status

While in filter status, unfiltered water flow in laminar state through packing layer (refined grain of quartz sand and garnet)by water distribution. impurities are trapped when water flow packing layer. Multiple distributions have set uniformly at the bottom of the filter. Collect and raise the filter water, smoothly filter, the filter flow in high speed and still achieve better filtering effect.

II.backwash status

While impurities accumulated continuously in the packing layer, inner head loss will continue to increase, the inlet and outlet water head loss reach the expected value and system will automatically activate the constant pressure device to the backwashing state. This filter backwashing finishes, water hydraulic valves change water direction, more easily clean build-up impurities.

PRODUCTS CHOOSING GUIDE:

 Remark: for larger filtration, multi-units can be used together.

Material: carbon steel coating polyester or PP plastic, valve material: cast steel, PVC

Pipeline interface: standard DIN interface, size based on actual requirements. 

III. QUARTZ SAND FILTER

Quartz sand filter is the most effective means of removal of suspended solids in water, also is important sand filter for advanced wastewater treatment, wastewater recycling and water supply treatment. quartz sand filter use quartz as filter medium, within a certain pressure, high turbidity water filter through a certain thickness of granular or the grain of the quartz sand filter, remove effectively the suspended solids, organic matter, colloid particles, microbial, chlorine, smelling and some heavy metal ions etc in the water, finally reduce water turbidity, purify water quality.  Quartz sand filter is the pre-filtration of reverse filtration and ultrafiltration equipment. Mainly used for silt, colloid, metal ions and organic matter intercepted and adsorbed. Common filter material is quartz sand, activated carbon, hard coal, manganese sand and so on. Widely applied to agricultural irrigation, chemical industry, petroleum, metallurgy, mining and other industries. 

 Quartz sand filter working principle

Efficiently continuous filter operation can be divided into raw water filter and filter media cleaning regeneration, exist independently, carry out simultaneously. They will locate in different space in filter, raw water filter’s power is high pressure difference or pump raised. The latter is finished by compressed air.

Quartz sand filter main characterests

The unique advantage of quartz sand filter is optimizing the filter material and design. The filter operates automatically, filter material has strong adaption for influent density, operating condition , pre-process technique and so on. that is while filtered, filter bed automatically forms in upper hydrophobic below dense state. Ensure water quality under various operating conditions. Filter material fully spread out in backwash state, cleaning effect is perfect. Sand filter can effectively remove the suspended solids in the water, also have obvious removal effect for colloid, iron, organic matter, pesticide, manganese, bacteria, virus and other pollutants.  

Design parameter:

IV. FIBER FILTER 

Efficient fiber filter based on adaptive filter media (comet type filter media) is a special series filter owning this core technique. Adaptive filter media is a new filter material, more cleaner for backwash particle and less water consumption, filter bed porosity formed with this filter media distributes approximately ideal filter media structure.  

 Product  Feature

1.High filter precision, removal rate for suspended solids is+ 95%, have some extent function of removal for macromolecular organic matter, virus, bacteria, colloid, iron and so on.   

2. fast filter rate, 40m/h in ordinary, max reaches 60m/h, is more 3 times than ordinary sand filter.  

3. high discharge of pollution, 15~35kg/m3 in ordinary, , is more 4 times than ordinary sand filter.  

4. low backwash water consumption rate, it is less than cycling filter consumption’s  1~2%.

5. Low dosage, low operating cost, because of the characteristic of the filter bed structure and filter media itself. flocculant dosing quantity is routine techniques’s 1/2~1/3. Improve cycle water yield, reduce ton of water operation cost.

6. small cover area, it is less than below 1/3 while making the same water.

Product usage

 Efficient fiber filter can widely used for impurities separations in water treatment, normal work in a wide filter speed. Have a good adaptation for raw water’s suspended solids concentration and change, it can remove a variety of pollutants in raw water. This filter can widely used for village and town of rural water supply, industrial water supply, water reuse, deep process pre-treatment.  

V.WALNUT SHELL FILTER 

Walnut shell filter, use walnut shell as filter media, special processing walnut shell, large surface area, strong adsorption ability, so stripping capability is more higher. As for the nature of hydrophilic but no oil, while stirred in backwash process, walnut shell grinded each other, thus it is equipped with stripping and regeneration capacity and good chemical stability, make for filter long term stability.

technical performance and character

Use walnut shell as filter media, special processing walnut shell, large surface area, strong adsorption ability, filter media can be backwashed and regenerated. Strong compressive ability(23.4kgf/cm2 ),stable chemical performance(not easily dissolve in the acid and alkali liquor), high hardness, good abrasion resistance, long time use and no need to change, strong adsorption section carrying capacity(adsorption rate 25-53%). Well hydrophilicity and oil immersion resistance. 

we export our products to more than 50 countries. We have more than 4 years experience on Alibaba. 1.American: USA, Canada, Ecuador, Peru, Chile, Agentina, Brazil, Mexico, Uruguay, Afgentina, Colombia, Costa Rica ect. 2.Europe: Germany, Holland, France, Spain, Hungary, Russian, Ukraine, Malta, UK, Portugal ect. 3.Asia: Iran, Israel, U.A.E. Saudi Arabia, Thailand, Singapore, Philippine, Vietnam, ect. 4.Africa: Libya, Egpt, Morocco, Algeria. ect.

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