8/12/2019 Bag Shredder Hazop

1/5

POLYWOVEN BAG SHREDDER FLOWSHEET

Feeding point

Shredding

Conveying

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2/5

Feeding

Item Deviation Causes Consequences Safeguards Recommendations

1.1 High feed rate Operator feeding too much broken bagsJammed shredder rotorscausing the drive to trip none

Prepare a feedingprocedure

Blocked inlet chute causingfeeding to be stopped none

Prepare a feedingprocedure

1.2 Low feed rate Operator feeding less bagsShredder discharges lessthan 200kg per hour none

Prepare a feedingprocedure

1.3 PokingBroken bags not moving freely in feedchute

Jerking of poking stick onoperator

Rotor shields are inplace

Operator to use stickwhile on level ground

HAZOP REVIEW OF SHREDDING POLYWOVEN BAGS IN ENCLOSURE

Intention: Feeding broken bags at feeding point

8/12/2019 Bag Shredder Hazop

3/5

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4/5

Conveying

Item Deviation Causes Consequences Safeguards Recommendations

3.1Packing shreds into portablesacks

No conveying means from shredderexists

Manual handling of

shredded bags into thefiring hopper none

Locate receiving

packaging onto theshreeder discharge area.

HAZOP REVIEW OF SHREDDING POLYWOVEN BAGS IN ENCLOSURE

Intention: Conveying shredded bags into hopper for firing

8/12/2019 Bag Shredder Hazop

5/5

Item Deviation Causes Consequences Safeguards Recommendations

4.1 Test ing fai lure No power supply Machine will not run noneCheck power supplycircuit for completeness

4.2 Maintenance Equipment due for maintenance

artisan injuries on openinggrinding compartmentknives or servicing, lifting upgranulator chamber

Use purposespecific limitswitches foecomponents beingworked on

Follow recommendedmaintenance procedureas per manual for specificareas being maintained

Equipment jammed while in operation

Sacks/foreign bodies insidegrinding chamber. Injuriesdue to crushing

Locking bars, limitswitches, physicalbarriers

Follow recommendedmaintenance procedureas per manual for specificareas being maintained

Equipment wearing parts worn out

4.3 Thermal fireThrowing cans inside grindingcompartments

Injuries and equipmentdamage

Follow operatinginstructions

HAZOP REVIEW OF SHREDDING POLYWOVEN BAGS IN ENCLOSURE

Intention: Startup, shutdown and maintaining shredder