GN Solids Control has provided many dredging systems for our clients. Almost all the GN dredging mud systems are customized in order to meet customers’ needs perfectly well. GN also manufactures standard mud systems for dredging.
For dredging, typical slurries have the following composition ranges. There are different layers in the sediment. For natural lakes, coarse debris is found near the river inlet and fine material builds up near the outlet. UAT customers also use the dredges for many man-made water bodies that can have unusual layers of materials.
Solids: 0-30%, typically 5-20%
Coarse debris (>6mm): 0-70%
Sands (0.07 – 6 mm): 10-100%
Clays/Silts/Organics (<0.07 mm): 0-100%
It is better to size the dewatering equipment for the majority of production, instead of the most difficult requirements. Design the dewatering equipment to handle only the 20% MAX solids slurry at the specified flow rates; the dredger using UAT’s small equipment can decrease the flow rate for the occasions where they are processing high-solids slurries.
1. GN Solids Control manufactures a scalper in the system before sending the sands/clays/silts to the shale shaker. Coarse debris includes rocks up to 10cm, trash, leaves, twigs, and sea shells. Screens on GN scalper are made from metal or polyurethane.
2. For the 4 stages separation, after separated by the scalper, GN Solids Control provides one shaker for second phase separation. The shaker will be a double deck shaker with different API Nos. shaker screens.
3. GN cyclones are used based on the mud they are separating. Bottom shaker will be the same as the shaker using in the front.
4. Generally speaking, GN equips one polymer adding unit before sending to GN decanter centrifuge. By adding polymer, fine solids will gather together and it will help the centrifuge to separate them out. GN Solids Control also manufactures standard dosing unit which the same size a 20 ft container.