SEBAC FiltersSEBAC FiltersSEBAC Filters

SELFSELFSELF---BACKWASHING AUTOMATIC VALVELESS GRAVITY FILTERSBACKWASHING AUTOMATIC VALVELESS GRAVITY FILTERSBACKWASHING AUTOMATIC VALVELESS GRAVITY FILTERS

(SINGLE, DUAL & HORIZONTAL BED TYPE)(SINGLE, DUAL & HORIZONTAL BED TYPE)(SINGLE, DUAL & HORIZONTAL BED TYPE)

Filtration is a process of physical re-

moval of suspended matter in raw wa-

ter & re-circulating cooling water in

Power, Steel, fertilizers and Cement

industries.

Side stream filtration decreases water

usage and improves heat transfer effi-

ciency, thereby reducing operating

cost. Employing side stream filtration

results in:

Reduced fouling

Reducebiologically induced corro-

sion

Reduce scaling by limiting corro-

sion

Significant energy and water sav-

ings

Reduction in chemical use

Lower maintenance cost

Improved productivity and reduc-

tion in downtime

ADVANTAGES OF SEBAC FILTERS

Minimum Labour: The SEBAC filters are “Operator–free” as they “filter and backwash” without any human intervention.

///////.,

Minimum Maintenance: In the SEBAC filters have no valves, pumps, flow controllers switches or other instruments which require frequent maintenance. The system requires “no-power” as it a gravity filter. Uniform High Quality Effluent: As the filtered water is discharged above the filter bed, a negative head loss cannot develop. This eliminates the problems of conventional filters including channelling, mud balls, that upset beds. The net result is uniform high quality effluent water with high reduction of suspended solids (99%).

Complete Control: Backwash can be manually initiated at any time regardless of bed condition; this permits adjustment of plant sched-ules.

Saves Time, Money & Space: Easy for transportation in Containers for horizontal bed designs. With Space saving dual bed designs, larger capacities can be met and very high loads can be dealt by using sever-al units in parallel. Manufacturing at our works eliminates

uncertainities of site, thus enabling us

on-time delivery with high quality &

economical construction.

Fig 1. Photos of Installation of Dual Bed filters for Toyo, India

Fig 2. Photos of Single bed filter at factory test bed

IEC FABCHEM LIMITED

K-32 B, Sipcot Industrial Estate,

Gummidipoondi-601201. Tamil Nadu, INDIA

Contact no : 9840088220 & 9382617744 e-mail: marketing@iecfabchem.in website: www.iecfabchem.in

CementCementCement CoolingCoolingCooling TowerTowerTower RefineryRefineryRefinery

Schematic Diagram Of Side Stream Filtration

Self-Backwashing Gravity Filters

These filters are of "Self Back-washing gravity type". Instead of monitoring the turbidity of filtered water which is seldom practical, the head loss princi-ple is a better control option.

Head loss actuates a backwash siphon and draws wash water from its storage through the bed and out through the siphon pipe to waste. A low level in the back-wash storage section breaks the siphon, and the filter returns to service.

SEBAC offers efficient water man-agement solution. This self-backwashing filter technology is developed at IEC Fabchem in-house Product Development Cen-tre. The filter design has been duly validated for establishing capacity of filtration & auto-backwash ca-pability.

IEC has successfully designed, de-veloped & installed single bed and dual bed Self Back-washing auto-matic valve-less gravity filters.

Product Description

SEBAC consists of a tank divided into three functional compartments

Backwash storage space

Filter bed compartment

Collection chamber

The backwash storage space is designed to hold an adequate amount of backwash water.

The filter bed compartment nor-mally contains graded filter sand supported on a collection system of disc having strainers which pro-vide uniform collection of filtered water.

Graded filter sand or dual media is generally used as the filter media.

Dual bed filters is generally preferred for large capacity filtration require-ments wherein the filtration equip-ment occupies considerably smaller footprint than a single bed filter of same output capacity.

This innovative filtration technology has the advantage of being able to treat large flows of water without consuming energy for the filtering and backwashing operation.

The standard models are available in steel.

The Stages of the Filtration:

The raw water flows through the fil-ter media. The hydrostatic pressure increases as suspended particles are retained causing the water level in the relative chamber goes up.

When pressure drop through the fil-ter bed reaches the set level, the backwashing is run automatically. The backwashing is achieved in a very short duration (approximately in 5 minutes or less)

The backwashing water, containing the solid particles retained during the filtration process, is siphoned into a dedicated sump, which later can be transferred to the sludge dewatering unit.

Energy Saving & Cost Cutting

SEBAC automatic Valve-less Gravity Filter can be easily installed in a closed- circuit cooling water system.

Furthermore, due to the simple princi-ple, the management and the supervi-sion of the process has minimal costs.

GA drawing of Horizontal Bed Filter

SEBAC DIMENSIONS – HORIZONTAL BED

Capacity m3/hr

Filtration area (m 2)

Size of Filter

Dia (mm)

Length (m)

SEBAC- 130H 2400 5.5 13

SEBAC- 270H 11.5 27

SEBAC- 150H 2700 5.5 15

SEBAC- 310H 11.5 31

SEBAC- 165H 3000 5.5 16.5

SEBAC- 345H 11.5 34.5

SEBAC- 180H 3300 5.5 18

SEBAC- 380H 11.5 38

SEBAC- 210H 3800 5.5 21

SEBAC- 430H 11.5 43

SEBAC dimensions (Single Bed)

Filter Capacity (Single Bed)

Size of the filter Inlet / Outlet pipe size

m3/hr Dia (Mt) Ht (Mt)

mm

SEBAC-8 1 4-5 65

SEBAC-31 2 4-5 100

SEBAC-45 2.5 4-5 150

SEBAC-70 3 4-5 150

SEBAC-96 3.5 4-5 200

SEBAC-125 4 4-5 200

SEBAC-160 4.5 4-5 250

SEBAC-200 5 4-5 250

SEBAC-237 5.5 4-5 300

SEBAC-282 6 4-5 350

SEBAC-300 6.2 4-5 350

GA Drawing of single bed SEBAC dimensions - Dual Bed

Filter Capacity (Dual Bed)

Size of the filter Inlet / Outlet pipe size

m3/hr Dia (Mt) Ht (Mt) mm

SEBAC-100D 3 6 80

SEBAC-150D 3.5 6 100

SEBAC-200D 4 6 125

SEBAC-250D 4.5 6 150

GA Drawing of dual bed