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What is a wedge wire filter?
The wedge wire filter is made of V -shaped profile wire wrapped and welded on the support wire to form a continuous wedge shaped gap. The smoothly face is the filtration face , the gap is in the form of strip.all the particles stops on the surface of the filter.
The wedge wire screen can made in different shapes: plates, tubes, baskets, and cone shapes , depends on the customer requirements.
Compared with the traditional filter mesh or sintered filters，It has the advantage of high intensity，durable and resistance to corrosion， even gap，excellent seepage performance and easy to clean and backwash and so on.It is particularly suitable for filtering high-flow, high-solid-content or high-viscosity media. And Widely be used in the industries of oil， foods， chemical， pharmaceutical and water treatment.
Wedge wire filter structure
These filters are mainly composed of the following parts:
profile wire: usually the material of it is stainless steel (304、316、316L )or other
corrosion resistance alloy，the cross section is V shape or trapezoid shape that will make sure the filtration gap is equally distributed
Support bar： usually ti is round or polygon type, provide support structure.
End seal: use welding or flange connection to make sure the sealing and the strength of the filter.
Working Principle of Wedge Wire Filter
For the wedge wire filter , it is surface filtration, which means when liquid or gas flow through the filters, the solid particles will be stopped on the surface of the filter, the clean liquid or gas will flow from the inside.Because of the wedge wire is V shaped, then the particles are less likely to get stuck in the gaps , and it is easy to clean by back wash, and then cause of that extending the service life of the filter.
Features of Wedge Wire Filter Elements
- Continuous gaps in increase the filter area,thus enabling a good contact with the fluid.
- The wedge wire filter made by V shape profile wire, thus made a Wedge shaped gap, avoid clogging, can make the filter have a smooth flow of the production. Moreover, Metal material makes it more durable than other filters.
- long working life , continuous gaps can work long time. Help to reduce the maintenance costs.
- Strong structure, high porosity. Filter gap from 20-5000micron， can meet different filtration requirements
- Easy to clean and back wash. Long working life, economically.
- Can be customized: diameter, length, slot size or shapes all of these can be customized. Commonly materials include stainless steel 304 and 316, but other special alloys such as 201, 430, Hastelloy, duplex steel, super duplex steel, 321, Monel, etc. can all be customized.
SIZE TABLE OF THE WIRES
About the filter direction ,not similar like other kinds products just simply have two filter direction from inside to outside and from outside to inside. For the wedge wire type filter we also need to confirm the winding direction of the profile wire, are they arranged vertically or horizontally? Then we can choice the right product.
Following , you will find the detial image of the filter.
Standard size of the wedge wire
diameter | length | Filer direction |
25,33,37,40,57,60,70, | FOTI/ FITO | |
100 |
| FOTI / FITO |
150 |
| FOTI / FITO |
200 |
| FOTI / FITO |
Wedge wire filter element application industry
1.Wastewater treatment:
- Used for solid-liquid separation in primary sedimentation tanks and secondary sedimentation tanks.
- Seawater desalination: As a pre-treatment equipment, it removes suspended solids and algae.
- Industrial circulating water: Filters impurities in the cooling water to protect heat exchange equipment.
2.Food and beverage industry:
- Beet Brewing： filters impurities from the malt juice
- Juice clarification： remove the pulp and fibers improve product transparency
- Syrup filtration : remove the impurities from the sugar production
3.chemical and oil industries
- Catalyst recovery: filter the catalyst particles from the reaction solutions.
- Crude oil filtration : remove the sand and impurities from crude oil
- Solvent refinement: filter the organic solvent during the chemical processing
4. pharmaceutical industry
- Pure water production: pre-filtration of the RO systems
- Filtering of active pharmaceutical ingredients: Removing insoluble particles from the medicinal liquid.
selection and maintenance
1.Selection
- Filter rating : depends on the particle size to choice the right slot width
- Material : for the corrosion media we should choice SS316L and special Alloy
- Working pressure: high pressure environment choice thicker filter
- Installation method: consider the filter direction from inside to outside or from outside to inside.
2.Maintance
- Regular Backwashing : use water or gas with a pressure of 0.2-0.3Mpa for backwashing
- Chemical cleaning: for the oil spill and organic substances the Acid-base cleaner will be better.
- Wear and tear checking: after long time working, check the wedge wire tube if there is any clogging or deformation of the wires.
二、Ending
The wedge wire filter which now is one of the importance choice of the industrial filtration for it’s unique structure, excellent filtering quality and long working life. It can provide high efficiency solid and liquid separation solution for waste water treatment, food processing and chemical production. Correct selection and maintenance can improve the filtration efficiency , reduce the processing cost,making it the ideal choice for optimizing the production technical of the company.
Get in Touch for Custom Wedge Wire Filters
Whether you need standard or custom filtration elements, contact LIANDA today to discuss your project requirements. We offer fast delivery, technical support, and competitive prices.
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