Material handling systems

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1 Srikanth Asst prof in jpnes Mahabub Nagar

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2 Material handling systems: a. Liquid handling different types of pumps. b. Gas handling various types of fans, blowers and compressors. c. Solid handling - conveyors a. Liquid handling different types of pumps; Pumps is a mechanical device to increase the pressure energy of a liquid.in most of the cases,pump is used for raising fluids from alower level to a higher level.

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3 Classification of pumps; 1.Reciprocating pump; In reciprocating pumps,the pumping element moves in forward and backward directions in acylinder. Uses; 1.These are used for injection of small scale quantities of inhibitors in polymerisation units and corrosion inhibitors to high pressure systems. 2.Used for boiler feed water applicaton a.Steam resprocating pumps. b.Power resiprocating pumps.

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4 In general,resiprocating pump s are classified based on the construction of water cylinder; a.Piston pumps; Piston pumps are classified on the number of water cylinder; TABLE;

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5 Each water cylinder may have different drive mechanisims and further classified as; a.Single-acting piston pumps. b.Double-acting piston pumps. b.Plunger pumps; TABLE;

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6 Based on placement,plunger pumps are classified as; a.Inside-packed Plunger pump; b.Out-packed Plunger pump; Further outside packing can done in two ways; i]Outside-centr-packed plunger pumps. ii] Outside-end packed plunger pumps. Ex;Piston pump,Plunger pump and diaphragm pump. c.Diapharm pumps;

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7 Reciprocating pump theory; 2.Rotary pumps; Rotary pump is the one which the liquid can be transported based on the mechanisim of rotation of one or more elements within a stationary casing. In general rotary pumps are classified based on nature of force applied; 1.Positive displacement pumps; In this Liquid is mechanicallly displaced by the rotation of one or more elements within stationary housing. Ex;Gear pumps.

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8 2.Centrifugal pumps; In general,the blades of impeller rotate by which a reduction in pressure is produced at its centre. Ex;Centrifugal pumps and gear pumps. Based on type of casing of the pump; 1.Volute pumps; 2.Turbine pumps; 1.Volute pumps; a. Single stage pumps; b. Multi satge pumps; a. Single stage pumps; classified as Open- impeller pumps and Closed-impeller pumps. Further classified as a.Single suction pumps; b.Double-suction pumps;

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9 Centrifugal pump -Theory; 3. Miscellaneous pumps; Ex;Peristaltic pump.

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10 Comparison of characterstics of Reciprocating and Centrifugal pump TABLE;

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11 Gas Handling system; For the transport of gases,the devices used are ; 1.Ejectors; Ex;Exhausting gas,Vacum pump. 2.Fans; Ex;Plate type fan,Forward curved blade fan,Backward curved blade fan. 3.Blowers; Ex; Cycloidal blowers,Centrifugal blowers. 4.Compressor; Ex;Rotary positive-displacement compressors,Reciprocating positive-displacement compressor.

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12 Solid Handling ; Conveying; The term conveying is applied to the transportations of solids. Objectives and Advantages; 1. Decreased product costs and increased manufacturing capacity. 2.Decreased cost of raw material. 3.Decreased processing time and conservation of energy. 4.Rigid in process controls leading to decreased quality control and quality assurance costs. 5.High degree of uniformaity,reproducibility of the process and complience with the cGMP regulations. 6. Minimum contamination and dust formation. 7.Increased employee safty and reduced labour cost.

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13 Conveyors are classified into five major groups; 1.Belt conveyors. 2.Screw conveyors. 3.Pneumatic conveyors. 4.Chain conveyors. 5.Bucket conveyors.

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14 1.Belt conveyors; Pharmaceutical applications; 1.Used in transporating containers for filling,caping,sealing,labelling,pasting,visual inspection etc....in the production of injectables,liquid orals,ointments and jellies. 2.In strip and blistering packing of tablets and capsules. 3. Used in manufacure of lozenges.

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15 2.Screw conveyors; Applications; 1.Used for transporting finely divided solids or pasty solids. 2. Materials having properties such as light weight,medium weight,abrasive,non abrasive and different denisities can easily handled. 3. Special flights and casing available for operations such as mixing,dewatering,heating and cooling. 4.Capacity to handle the materials of about 280metercube/hour.

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16 3.Pneumatic conveyors; Applications; 1.Most imporatant in handling technique in chemical industry. 2.Used in formulation of powedered insuffations. 3.Used in unpleasant and injuroius materials,since it is closed system. 4.Poweders containing poisonous constituents can be transporated. 5.Fine powders and pellets having the size up to 6.0mm and bulk denisities from 16 to 3000kg/meter cube can be handeled.

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17 4.Chain conveyors; Applications; Widely used for loose material that is nonabrasive,such as grain,food waste,garbage,sawdust,chips and coal. 5.Bucket conveyors; Applications; Used in transporating coal,crushed stone,grains etc.... Solid sorage; 1.Bunker; 2.Hoopers,bins and silos;

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