FGD belt filter cloth | Horizontal vacuum belt filter fabric for flue gas desulfurization
The flue gas desulfurization (FGD) filter cloth is specially designed for the vacuum belt filters to filter the gypsum which generated during the flue gas desulfurization in the coal-fired power plant. This kind of horizontal vacuum belt filter cloth is woven by PET monofilament in the warp and multi-strand filament in the weft, to ensure high filtration efficiency and good air permeability meanwhile in strong mechanical strength.
The lime slurry wet process is the most widely used in the flue gas desulfurization, deployed in about 90% of the coal-fired power plants all over the world, due to its advantages of fast, high efficiency of 99% SO2 removal, excellent adaptable for nearly all kinds of coal fuel, furthermore the highly purified gypsum of by-product could be recycled and resale for wallboard, cement, and other manufacturing uses.
It uses the limestone slurry neutralizes the sulfur dioxide (SO2) in the exhausted flue gas to form the gypsum. Irrespective of whether the gypsum of by-product is saleable or it is intended to be disposed off in landfills, the slurry needs to be dewatered. Filtration equipment has to be deployed at the downstream of the reaction vessel to dewater the gypsum slurry which after pre-thickened and partly classified.
Belt filter cloth for vacuum horizontal belt filter in FGD process
The horizontal belt filter and rotary drum filter are both applicable in this type of application. Although a vacuum horizontal belt filter is more efficient than a drum filter since gravity assists in the filter cake formation rather than working against it, also due to the continuous working and large throughput ability of vacuum belt filters. Our vacuum belt filter cloth plays the crucial role of the filter medium for a horizontal belt filter.
Bonfilt’s horizontal belt filter fabric made out by the high viscosity PET monofilament & multi-strand filament yarn, which makes our filter cloth robust & durable under the force of puff and suction repeatedly and mechanical tension on the vacuum belt filters, also good chemical resistant and high temperature up to 130 degrees resistant. The intersect of mono & multifilament yarns make our filter belts in high efficiency to capture the tiny gypsum particles even 2-100um, enable filter cake with low residual moisture and excellent filtration performance.
PP belt filter cloth is also available, it has better acid and alkali-resistance than Polyester, but a little low strength and temperature resistant to 90 degrees. Commonly used in the power station of high-quality gypsum, as well as the chemical industry where the horizontal vacuum belt filter equipment is needed.
Bonfilt’s FGD belts feature:
Bonfilt’s FGD vacuum belt filter cloth is woven by heavy-duty rapier looms to achieve uniform precise aperture and even surface. The pattern of stain weave makes the belt filter cloth has a smooth surface and subtle opening for good filtration property and air & water permeability, while the harsh reverse side with big apertures that help drainage and promote the belt filter cloth adhesion tightly on the bottom rubber belt or the driving rollers.
After treatment of thermal setting is necessary for all kinds of synthetic belt filter cloth, it aims to enable the filter belts in better dimension stability, more smooth surface, better cake release and easy clean during working.
Joint: the firm stainless steel 316 clipper seam with apron cover cloth to ensure good durability and keep the vacuum during the filtration process.
Overall, Bonfilt’s vacuum belt filter cloth for FGD has the features below,
- Robust and durable.
- High filtration efficiency and properties.
- High temperature resistant up to 130 degrees.
- Good chemical resistant, PET has excellent properties of acid and corrosion resistant, and alkalescent resistant.
- Smooth surface for good cake release.
- Easy clean.
- Good dimension stability.
- Precise aperture, filter fineness 2-100um.
|Flue Gas Desulfurization (FGD) Belt Filter Cloth|
|Type||Yarn Dia. (mm)||Density (yarn/cm)||Strength (N/cm)||Weight (kg/m2)||Thickness (mm)||Air permeability (m3/m2.h)||Filter fineness (um)|
|BF27508-1||Flat 0.5×0.32||600D filament+0.5||28.5||21||2200||1000||0.9||1.9||720||20-50|
|BF27508-2||Flat 0.5×0.32||Strand PET filament||28.5||23.5||2200||1000||1.1||2.1||310||2-20|
|BF24508||Flat 0.5×0.32||800D filament+0.5||26||23||2200||1000||0.94||1.22||400||30-60|