Rotary Vacuum Paddle Dryer

Supply TypeManufacturer, Exporter
Preferred Buyer Location All over the world

Rotary Vacuum Paddle Dryers is utilized in varied industries to extract and obtain dry powder either from solutions or wet cake. Operational efficiency is high and the costs incurred are low with....

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RAVI INTERNATIONAL

Vikhroli, Mumbai, Maharashtra

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Member Since 16 Years
Nature of Business Manufacturer
GST No. 27AAGPP0322E1Z5

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Rotary Vacuum Paddle Dryers is utilized in varied industries to extract and obtain dry powder either from solutions or wet cake. Operational efficiency is high and the costs incurred are low with this dryer when compared to other dryers in the market. The mechanism, involves a closed system wherein hot water, steam, or hot fluid is used as a heating medium within the jacket, in the hollow paddle as well as in the hallow shaft. This paddle dryer includes vacuum pump, condenser, receiver and dust collection.
Wet feed receives good heat transfer with the constant agitation triggering heated rotating paddles and minimum clearance between scrapers and heated walls. This process gives rise to the evaporation of moisture or solvent, which makes the wet material dry to the essential level. Vacuum is used to remove the vapors that are formed already. Further, the dust problems are eradicated with the absence of large air flows, which also results in low energy consumption. These vacuum paddle dryer (RVPD) are highly appreciated in the market.

FEATURES :
Drying optimization is a process that is carried out by means of external and internal heating. The large heat transfer area available on the wide paddles and hollow shaft enable and equip maximum heat transfer efficiency to the product. External heating is generated through jacket or limpet coils, while internal heating through a hollow shaft, along with a set of hollow paddles. These hallow paddles are equipped with scrapers that have very low gap from wall in order to maximize heat transfer. Scrapers move material to all parts of the dryer and additionally help in discharging the material. There is a hollow rotating agitator shaft that imparts heat to the product and scrapes the shell wall tumbles. This facilitates for maximum heat transfer and discharge product whenever required. Mechanical seals at Shell ends/Stuffing Box. The vessel is well designed to take temperature stresses in the process of vacuum drying. Thereby, there is low power consumption with the use of helical bevel gear box. Special floating bearing design to combat temperature stresses. So as to remove the condensate formed by steam heating in the hallow shaft, special rotary joints are also designed to introduce heating media in the hollow shaft. Product Filter is very efficiently used to arrest valuable product carried away with the vapors in a filter bag. The arrested product particles are thrown back into the dryer by reverse flow of pulsating air. Generally, the product filters are heated to avoid condensations of vapors in the filter bag. User friendly discharge valve design provides vacuum tight closing when the material is processed. The quick opening facility lever facilities filling of bags when material discharge and packed. Breaker bars are incorporated in the RVPD to break the lumps when the product forms lumps at some stage in drying process. Insulation with Cladding will provide on heating jacket/Limpet coil

Rotary Vacuum Paddle Dryers (RVPD) is a cylindrical jacketed vessel with a central agitator having specially designed blades. The blades of this Rotary Vacuum Paddle Dryer (RVPD) are so designed that they sweep the entire internal surface and at the same time turn the material so that all the particles are come in contact with the heated surface. GMP construction - Cylindrical, horizontal vessel with flat welded rear cover and a hinged flat front door opening up over the entire vessel diameter. With the door open the internals of the machine are fully accessible for cleaning and inspection purposes All surfaces in contact with the product such as the vessel, rear cover, front door, agitator and vapor filter are heated, providing very efficient heat exchange. To provide for good heat exchange and discharge characteristics the cylindrical vessel, the rear cover, the front door and the agitator are machined to assure the smallest possible tolerances between agitator and vessel walls. The agitator is installed at the rear of the dryer, supported on one side of the vessel only. The agitator is designed to meet the requirements of this particular dryer type to assure good and even mixing action throughout the dryer volume, also in reverse operation. The agitator provides very good emptying characteristics, and at the same time reduces friction onto the product to a minimum to prevent local overheating as well as to prevent directional thrust or local product compression. A double mechanical seal is installed on the rear cover, well accessible for cleaning and maintenance purposes. A spacer in between the seal and the agitator drive permits removal of the seal without disassembling the drive. Dry or wet running mechanical seals may be installed. The central agitator shaft is supported on the one end bearings housed in bearing housing in such a way that the alignment remains always intact. This central agitator is driven by means of a Motor & Gear box through the bull Gear. The horizontal shell is jacketed to heat the shell with steam / hot water or any other thermal fluid. Limpet coil is provided instead of jacket if the heating media is fluid. A Dust Catcher consisting of bag filter is provided on the top to prevent the losses of material particles after the drying process. A Condenser of adequate heating surface area is provided wherein the evaporated vapors are condensed and these condensed vapors are then collected in the receiver of suitable capacity, placed beneath the condenser. A Vacuum Pump of adequate capacity is provided & fitted to the receiver of these rotary vacuum dryers to create the vacuum in the dryer shell through the Receiver, Condenser and Dust Catcher.

SALIENT FEATURES OF ROTARY VACUUM DRYERS (RVD) :
Very suitable for drying materials which are heat sensitive, as low temperature for drying can be maintained by high vacuum Lowest energy consumption compared to any other batch type dryer due to higher differential temperatures. Higher Thermal Efficiency. Almost 100% recovery of solvents. Heating Temp.: From 30°C to 300°C. Evaporation Rate : 4.12 Kg/ HrlSq. Meter of Heating surface area of water at heating temperature of 100°C. Limpet coil could be provided instead of jacket if the heating media is fluid. Breaker bars of approximately same length as dryer shell can be provided if lump formation is expected during drying

MODEL	RV-RVPD500	RV- RVPD750	RV- RVPD1000	RV-RVPD1500	RV- RVPD2000	RV- RVPD3000	RV-RVPD4000	RV-RVPD5000
TOTAL VOLUME IN LTRS	500	750	1000	1500	2000	3000	4000	5000
TOTAL VOLUME IN LTRS	300	450	600	900	1200	1800	2400	3000
CAP IN KGS (MAX)	175	250	350	500	700	1000	1350	2000
SHELL DIA MM	650	725	800	900	1000	1100	1250	1350
SHELL LENGTH MM	1500	2000	2000	2350	2600	3200	3300	3500
RPM OF PADDLE	14	12	10	10	8	8	8	6
HEAT TRANSFER AREA- M2	4	5	7.5	9	10	14	17	20
DUST FILTER AREA –M2	0.25	0.35	0.5	0.75	1.0	1.25	1.5	1.75
CONDENSOR –M2	1.5	2	2.5	3	3.5	4	4	4
RECEIVER IN LTRS	75	100	150	200	250	250	250	250
CHARGING HT. IN MM	1650	1750	1900	2200	2300	2400	2600	2800
DISCHARGING HT. IN MM	650	650	750	750	750	750	750	750
CHARGING SIZE IN MM	100dia.	100dia.	125dia.	125dia.	150dia.	150dia.	200dia.	250dia.
DISCHARGING SIZE IN MM	150dia.	175dia.	200dia.	200dia.	250dia.	250dia.	300dia.	300dia.
GEAR BOX	4”	4”	5”	5”	6”	7”	8”	10”
MAIN DRIVE MOTOR	5HP	5HP	7.5HP	7.5HP	10HP	15HP	20HP	25HP
LENGTH IN MM	2900	3350	3750	4350	4750	5250	5500	5750
WIDTH IN MM	950	1050	1125	1200	1325	1500	1625	1700
HEIGHT IN MM	2200	2500	2850	3000	3250	3700	3800	4000
WEIGHT IN KG (APPROX)	800	1000	1250	1500	1900	2500	3000	3500

Design Temp: 200OC, Testing: Vacuum side Full vacuum upto 750mm of Hg & Steam/Hot water jacket side 5 Kgs/cm2 pressure test

CANTILEVER MODEL:

MODEL	RV- RVPD50	RV- RVPD100	RV-RVPD200	RV- RVPD500	RV-RVPD750	RV-RVPD1000	RV- RVPD1500	RV-RVPD2000
TOTAL VOLUME IN LTRS	50	100	200	500	750	1000	1500	2000
TOTAL VOLUME IN LTRS	30	60	120	300	450	600	900	1200
CAP IN KGS (MAX)	15	30	70	175	250	350	500	700
SHELL DIA MM	400	475	600	800	900	1000	1150	1250
SHELL LENGTH MM	450	600	750	1000	1175	1300	1600	1650
RPM OF PADDLE	16	16	14	14	12	10	10	8
HEAT TRANSFER AREA- M2	1.1	1.5	2.1	4.0	5.0	7.5	9.0	10
DUST FILTER AREA –M2	0.05	0.07	0.10	0.25	0.35	0.50	0.75	1.0
CONDENSOR –M2	0.25	0.5	1.0	1.5	2.0	2.5	3.0	3.5
RECEIVER IN LTRS	15	25	50	75	100	150	200	250
CHARGING HT. IN MM	1800	2000	2300	1750	1900	2000	2300	2550
DISCHARGING HT. IN MM	600	600	650	650	650	750	750	750
CHARGING SIZE IN MM	100dia.	100dia.	125dia.	100dia.	100dia.	125dia.	125dia.	150dia.
DISCHARGING SIZE IN MM	125dia.	150dia.	175dia.	200dia.	225dia.	250dia.	250dia.	300dia.
GEAR BOX	2”	3.5”	3”	4”	4”	5”	5”	6”
MAIN DRIVE MOTOR	1HP	2HP	3HP	5HP	5HP	7.5HP	7.5HP	10HP
LENGTH IN MM	1500	1800	2300	2800	3200	3500	4000	4500
WIDTH IN MM	600	750	900	1125	1200	1325	1600	1625
HEIGHT IN MM	1800	2200	2500	2850	3000	3250	3700	3800
WEIGHT IN KG (APPROX)	400	500	600	800	1000	1250	1500	1900