Product Det

The filter/filter dryer has wide field of applications in chemical, pharmaceutical, Agro chemicals, fine chemicals, and food industries. Sterilizable pharma versions are available for aseptic requirements.

CONSTRUCTION

Agitated Filter is a Cylindrical, Vertical closed vessel made as per pressure vessel codes. The vessel is fitted with plane filter media, either metallic or synthetic at the lower end of the vessel. Specially designed slow speed, robust Agitator assembly is mounted on vessel. The Agitator design adopted is advanced and unique to this system .The “ S” Type self centering blades are made from heavy sections to handle liquid as well as solids. It has four movement; each movement, either single or in combination is designed to carry out specific operations.

The movements of agitator are

1.Clock wise rotation: For smoothing cake surface and compacting it during filtration.

2.Anticlock wise rotation: F or stirring near filter media to keep it clear of sedimentation, re-slurring while washing and atomized discharging.

3.Upward movements: Operated by hydraulic cylinders at constant speed to assist mixing.

4.Down ward movement : Operated by hydraulic cylinders with variable speed to assist squeezing and discharge.

OPERATION/PROCESS :

CHARGING: Slurry is charged into filter preferably by gravity flow from Reaction installed above the filter or by slurry pump.

FILTRATION: While charging the slurry into the filter, filtrate will start passing through filter cloth by gravity. To enhance filtration rate and to keep filter media clean from initial sedimentation, the agitator can be brought down most position and keep on rotating in forward direction. The cake height can be built up in successive steps.

CAKE WASHING: Wash liquids is sprayed into the chamber on cake through a spray ring. The stirrer blades are lowered to agitated the slurry to obtain good cake washing. The wash liquid is sprayed repeatedly though the filter cake by the same driving force as used during the first stage filtration.

SMOOTHING AND COMPRESSION: At the closing stage of the filtration process described above, the stirrer blades are lowered on the cake surface. The specially designed hydraulic system, takes over to perform a systematic, efficient and productive smoothing of the cracks which appear in the cake, leaving behind low residual moisture 10to 20% less as compared to other conventional filters. This results in energy saving in drying process at least by40%.

FILTER CAKE DRYING: After the final wash, filtration and compression, the heating medium is fed into the limpet/jacket and the chamber below filter plate as well as Hollow shaft and Hallow Blade .The stirrer blades are lowered and the cake mass is agitated during the drying stage. The vapour can be removed under vacuum applied to the filter. Drying can be enhanced by purging a hot gas through cake.

PRODUCT DISCHARGE: The stirrer blades are rotated and lowered to cut away the upper surface off the filter cake. As the blades descend into the cake mass, the discharge value is opened and a controlled discharge of the cake is achieved.

SALIENT   FEATURES:

• Designed and Manufactured to suit critical hygienic conditions of pharma and food industries.(cGMP MODEL)
• Detachable bottom is operated by hydraulic cylinders and held tightly with zero leakage.
• Offered  in various materials of constructions, like stainless steel,  carbon steel, rubber lined carbon steel and lead lined carbon steel.
• Offered in a wide  range of filtration area capacities.
• Significant squeezing of filter cake is possible, there by resulting in considerably lower residual moisture in the cake, resulting in reduction in energy requirement for drying of filter  cake by upto40% depending on cake characteristics.
• Method of operation is totally enclosed, neat and hygienic. These conditions are excellent  for solvent recovery, handling of toxic and hazardous materials without human intervention.
• Enables easy, non-manual and automatic cake/solid discharge. Scraper blade is provided to scrap the material which may stay on shell.
• The unit is designed with  minimum maintenances feature.
• Hallow shaft and Hallow Blade for thorough drying.
• Specially designed tank cleaning nozzle is provide for through cleaning of inside of filter body.

Hydraulic  power pack:

1.  Discharge valve operation for  labour – free cake removal.

2. Lowering  and lifting the Agitator.

3. Lowering the detachable bottom when provided.

4. Driving the Agitator, when hydraulic motor is used.

The above features along with precision in manufacturing give excellent process control viz. filtering, spreading, compacting,  reslurrying, washing, discharging and drying.

Filter Media: Filter media is selected as per specific process requirements.They are textile cloth from natural or synthetic fibres, metal wire clothes of multi layered sintered mesh.

Detachable Bottom :   Filter/Filter dryer when supplied with detachable bottom can be lifted/lowered by hydraulic cylinders. Unique quick descending/ ascending arrangement is also available where the bottom is held in position by hydraulic cylinders during pressure filtration. This arrangement can   assist  in quick changing of filter cloth and product change.

Discharge Valve and Sampler: Plug Type Side Discharge valve is provided near the filter plate.Designed as per customer requirements- Metal to Metal sealing, Polymer sealing, Quick openable doors Online Product sampler with Valve.

Mechanical Seal: Double/Single Mechanical Seal either dry or wet type can be fitter on filter/filter dryer. The mechanical seal has bellow extended on the shaft.

MODEL	MEANFD50G		MEANFD100G	MEANFD200G	MEANFD300G	MEANFD500G	MEANFD1000G	MEANFD1500G	MEANFD2000G	MEANFD3000G	MEANFD5000G
WORKING VOLUME	50		100	200	300	500	1000	1500	2000	3000	5000
CAKE VOLUME	25		50	100	100	200	350	600	800	1400	2200
FILTER AREA	0.20		0.40	0.50	0.60	0.75	1.10	1.5	2.0	3.0	5.0
VESSEL DIA	425		600	700	800	1000	1200	1400	1600	2000	2500
VESSEL HT	400		400	550	600	600	900	1000	1000	1000	1000
BOTTOM OPENING STROKE	300		300	300	300	300	300	300	300	300	300
DISCHARGE VALVE ID	150		150	200	200	250	300	300	400	450	450
AGITATER RPM	10		10	10	10	10	10	10	10	10	10
AGITATOR DRIVE	1		1	2	3	5	7.5	10	12.5	15	20
AGITATOR VERTICAL STROKE	200		200	200	200	250	250	300	400	450	450
AGITATOR UP/DOWUN SPEED	250		250	250	250	250	250	250	250		250
	1300x1300x2400		1500x1500x2500	1700x1700x3000	1800x1800x3000	2000x2000x3300	2200x2500x3675	2300x2300x3800	2500x2500x3800	2800x2800x4375	3500x3500x4600
DESIGN PRESSURE		Vessel -Full Vaccum , Jacket/Limpet – 4bar
DESIGN TEMP		150deg
FINISH		Internal: 240gr Mirror finish, External 180gr Mat finish