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Can polyurethane hydrocyclone be anticorrosive? How to extend service life?

Author: Time: September 17, 2020 46 views

Polyurethane hydrocyclone is used in petroleum industry. It is suitable for the classification process of metal ore dressing plant and non-metal concentrator. It is also used for desliming and dewatering of mud materials. The reflux height is considered. In the general selection, it is easy to ignore that in this relatively short pipeline, the inlet pressure requirement of polyurethane cyclone is relatively strict, and the height of 2-4.5min should be considered. Working principle of polyurethane hydrocyclone:

 Polyurethane cyclone

Can polyurethane hydrocyclone be antiseptic? How to extend the service life?

Understanding and calculation of pressure value of cyclone inlet pressure gauge. Understanding of the inlet pressure value of dense medium cyclone in the calculation process: this pressure value can be directly calculated by adding the clean water head and pipeline loss. Reasonable selection of pump speed. Due to the high density of the slurry transported, and if it is pressurized feeding, the particle size of raw coal is larger and the pump is seriously worn, so the pump with lower speed should be selected.

The rotating speed is between 590 and 730r / min. The following aspects should be paid attention to when selecting the outlet diameter of heavy medium cyclone. The nominal diameter of the outlet pipeline should be the same as or slightly larger than the outlet diameter of the pump, and the flow rate in the pipe should be between 2.0 ~ 3.0m3/s; if the size of the inner diameter of the pipeline is too large, the flow rate of the pipeline will be too low, resulting in solid precipitation and blocking of the pipeline; if the pipe diameter is too small, the pipeline resistance is too large, which will consume the pump head and cause the inlet pressure of the cyclone to drop.

 Polyurethane cyclone

When the two-phase (or three-phase) mixture to be separated enters the hydrocyclone tangentially from the periphery of the hydrocyclone at a certain pressure, a strong three-dimensional elliptical strong rotational shear turbulent motion is generated. Due to the size difference (or density difference) between coarse particles (or heavy phase) and fine particles (or light phase), the centrifugal force, centripetal buoyancy force and fluid drag force are different. Due to the centrifugal sedimentation, most of the coarse particles (or heavy phase) are discharged through the cyclone sediment inlet, and most of the fine particles (or lighter substances) are discharged by the overflow pipe, so as to achieve separation and classification Purpose.

Reasonable selection of impeller flow channel of pump. Because in the pressurized feed, the heavy medium contains a large number of large particles of raw coal, so the impeller flow path of the pump should be wider to facilitate the raw coal to pass through. Technical characteristics of polyurethane hydrocyclone: industrial application of polyurethane hydrocyclone: simple structure, low cost, easy installation and operation; small volume, small floor area, large processing capacity and low operating cost; simple treatment process, long-term stable operation after determination of operation parameters, wide application, good wear resistance, long service life, high separation accuracy and high efficiency.