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Table of Contents

Chapter 1: Waste to Energy

WASTE TO ENERGY

The two most common methods for moving refuge in a waste to energy facility are Electro-Hydraulic Grapples and 4 Rope Cable Grapples.   In the past cable grapples were the preferred method, but recently electro-hydraulic grapples are becoming the more popular option.  Prior to 4 rope grapples, refuge buckets were commonly used. 

Chapter 2: Waste to Energy Grapple Styles

WASTE TO ENERGY GRAPPLE STYLES

The two most common methods for moving refuge in a waste to energy facility are Electro-Hydraulic Grapples and 4 Rope Cable Grapples.   In the past cable grapples were the preferred method, but recently electro-hydraulic grapples are becoming the more popular option.  Prior to 4 rope grapples, refuge buckets were commonly used. 

Chapter 3: Four Rope Waste to Energy Grapple

FOUR ROPE WASTE TO ENERGY GRAPPLES

When looking for a four-rope waste to energy incinerator grapple, there are some designs and features which should be considered.  This section is related to cable life, the first feature which is highly recommended is cluster sheaves.  Cluster sheaves sit at the top of grapple where the cable enters the grapple from the crane.  Cluster sheave creates a round opening, as opposed to a square opening on a roller design.  This round opening greatly reduces the stresses on the cable as the bucket list and can increase the cable life by over 4 times.

Another feature which will greatly increase the life of your cable is the size of the sheave in the grapple.  The grapple to sheave ratio is ideally at a minimum of 24 to 1, i.e.: 1-inch cable should be run through at least 24-inch sheaves.  In addition, the sheave housing should be designed in such a way that it prevents the cable from jumping off the sheaves.

Chapter 4: Electro-Hydraulic Waste to Energy Grapple

ELECTRO-HYDRAULIC WASTE TO ENERGY GRAPPLES

 

Chapter 5: Clamshell Waste to Energy Buckets

WASTE TO ENERGY CLAMSHELL BUCKETS

Incinerator clamshell buckets are not as common as were in the past and are very rare today. 

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