Combined telescopic loading bellows are used for dust free loading of powdered and granular bulk solids both into tanker trucks and flatbed open trucks. Free flowing dry bulk solids in powder and granule form are easily transferred from silos, hoppers, containers, screw feeder to trucks. There exists flexible dust skirt and poliurethane coated discharge cone together at the same loading bellow unit. Combined loading bellows are suitable for applications where incoming truck types vary.
Operation of Combined Truck Loading Bellows
Combined truck loading bellows have two operation modes selected from control panel at the beginning of truck loading. Depending on type of truck (open truck or tanker truck) loading bellow operation scheme changes.Open Truck Loading Mode
At the beginning of open truck loading, bellow is lowered towards the flatbed of truck and stops at the bottom. Flexible dust skirt located at the bottom side of bellow keeps the dust content inside the loading region. During material discharge, it provides a closed containment for dust. Dust collection system collects any fugitive dust in the region and prevents dust emission to surrounding. Collected dust is sent back to the product stream continuously and no material is wasted during loading. Built in level sensors monitor the product level below the loading bellow dust skirt. When the material level increases, bellow is retracted upwards automatically and it maintains a space to let the material flow rapidly. After truck loading is finished, product discharge valve above the loading bellow is closed. System waits for few seconds to complete product flow and to collect remaining dust by dust collector. Loading bellow automatically retracts to the top position afterwards.
Tanker Truck Loading Mode
At the beginning of tanker loading, bellow is lowered and stopped when it reaches to the tanker inlet automatically. Poliurethane coated discharge cone fits vessel inlet to prevent any dust emission during tanker loading. Material falls freely through the inner side of the bellow. After bulk tanker filling is started, built in vacuum fan evacuates the air trapped in the vessel to increase product flow rate. This vacuumed air passes through the dust collector. Dust content in the air is trapped by filter units and sent back to the tanker with the help of automatically operated pulse jet valves. Level sensor placed at the bottom monitors the product level in the tanker truck. Level sensor sends a signal to stop loading, when the tanker is full. Product discharge valve above the loading bellow is closed. System waits for few seconds to complete product flow and to collect remaining dust by dust collector. Loading bellow retracts to the top position automatically.
Advantages
– Suitable both for open bulk truck loading and bulk tanker truck loading – Dust free loading – Dust free working region, prevention of dust pollution, ensure plant and environmental safety. – Suitable for different bulk solids conveying and storage systems – Loading is possible from different equipment like silo, hopper, screw feeder, conveyors etc. – Extensive range of models are available for wide range of needs – Built in flexible dust skirt to prevent dust emission outside of the loading region. – Poliurethane coated discharge cone that fit vessel inlet to prevent any dust emission during tanker loading – No spillage and no product waste – Materials with high temperatures up to 300 C can be loaded. – Food grade loading bellows are available – Simple operation – Easy maintenance
Handled Materials
Cement, fly ash, mining minerals, calcium carbonate, pvc, plastic pellets, plastic powders, alumina, bentonite, bauxite, coal, cement clinker, gypsium, kaolin, limestone, marble powder, soda ash, quartz, urea, sodium sulphate, wheat, flour, animal feed, seed, corn, rice, sugar, salt and similar powdered and granular dry bulk solids.
