How to Maintenance Decanter Centrifuges?Replace polyurethane seal Normally, when the sand pump is running months, Drilling Mud Cleaner should be replaced at once polyurethane seals and seal sleeve. There must be an electrical engineer specializing in operation and maintenance. At present, only a few well-drilling operations abroad with the type of high-speed centrifuge, high performance requirements for drilling special wells, Drilling Mud Cleaner recommended speed centrifuges and centrifuge series of domestic high-speed process, the medium-speed centrifuge drilling into the post-processing of high-speed centrifuge for liquid storage, treatment by high-speed centrifuges, Drilling Fluids Desander used repeatedly into the circulatory system. Decanter centrifuge troubleshooting Fluids Desander at this time to get a better purification of positive significance to improve the follow-up tbol rebound gyno of DWM Solids Control drilling sand pump, drilling, downhole equipment, etc. Kosun solids control undertakes equipment selection, design and manufacturing according to material data and actual demands of users.
Common Troubleshooting of Solids control equipment Decanter Centrifuge
Yorkshire Water clears a backlog of 50, m 3 of sludge that resulted from the breakdown of belt presses by installing the Alfa Laval Aldec G2 decanter centrifuge. T wo Aldec G2 decanter centrifuges from Alfa Laval helped the UK company Yorkshire Water avoid a potential environmental problem at its Esholt sewage treatment works by clearing a backlog of 50, cubic metres m 3 of sludge in six months. Part of the Kelda Group, Yorkshire Water provides 1. The company supplies daily around 1.
Its complex of mineral filters handles the sewage generated by a total equivalent population of , and produces a humus sludge that is treated, dewatered and then mixed with wood waste to produce a rich conditioned compost that is used for agriculture and land remediation. Until last year, three traditional belt presses dewatered the sludge, producing a dry cake of 18 per cent Dry Solids DS on new humus and slightly less than that from old humus.
Unfortunately, the belt presses never achieved the levels of throughput for which they were originally specified and, as a consequence, a backlog of humus continuously built up. The problem became critical last year following a series of breakdowns that left Yorkshire Water with the problem of how to clear an accumulation of 50, m 3 while still continuing to cope with an average daily output from the lagoons of around 1, m 3.
Yorkshire Water officials were, naturally, anxious to clear the accumulated sludge as quickly and efficiently as possible. Officials at Yorkshire Water decided to use this situation as an opportunity to consider various options given that they had already decided that the belt presses were unlikely to provide the answer either to the immediate problem of the accumulated humus or the predicted increase in demand. Alternative solutions included the use of decanters and other types of dewatering equipment.
Alfa Laval provided a test rig consisting of a standard Aldec decanter centrifuge mounted in a trailer. After reviewing the test results and confirming that the decanter centrifuge had outperformed the belts by a considerable margin, Yorkshire Water installed two ALDEC G2 decanter centrifuges, which Alfa Laval had just recently introduced. These, in turn, are governed by the volume and composition of the solids in the sludge.
With a drive system that allows both the bowl speed and the conveyor speed to be controlled independently of each other, the Aldec G2 also has the lowest power consumption, under all conditions, of any sludge decanter centrifuge currently available. Once installed and commissioned, the pair of Aldec G2 decanters began clearing the 50, m 3 of stored humus while still handling the daily output of the lagoons.
The machines run continuously, 24 hours per day, days per year, each processing an average of 30 m 3 of humus - containing 4 per cent DS - every hour and producing a cake with 25 per cent DS. They have proved equal to the task not simply in terms of clearing the backlog, but also in the improvement in cake dryness and quality which makes it easier to handle and store.
The compost produced by mixing the dewatered sludge with wood waste is stored in windrows at a rate of two tonnes per square metre and then left to mature. Once conditioned, the sludge is spread up to a foot deep across prepared areas on the site and then seeded with grass. This removes more bacteria and also thickens the product prior to its final use, after harvest, as a valuable agricultural fertiliser.
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Did You Like this Article? Click here to enlarge image. The dewatered sludge exiting the Aldec G2 decanters before being formed into windows.