The function of spiral shaftless sand water separator in sedimentation tank

The function of spiral shaftless sand water separator in sedimentation tankworking principle
The spiral inclination angle of the sand water separator equipment is generally between 25~30 °. The sand water mixture enters the equipment from the inlet pipe, and the mixture passes through the aggregation box on the upper part of the separator. Under the action of water flow, the sand particles in the mixture are separated from the organic matter. The sand water enters the sand collection tank, and the particles with a higher specific gravity (such as sand particles) decrease due to their own weight and deposit at the bottom of the spiral tank. Under the push of the spiral blades, the material flows along the inclined U The bottom of the groove is lifted, and after leaving the liquid level, it continues to move up a certain distance. The water in the sand particles gradually flows back to the water tank through the gaps of the spiral groove blades. The sand particle liquid gradually dries up and falls into other conveying devices by its own weight. The supernatant continuously overflows from the drainage weir, and the organic matter also flows out of the overflow groove with the supernatant under the action of the water vortex, returning to the sewage well, thus achieving the separation of sand and water.
The function of spiral shaftless sand water separator in sedimentation tankOutline schematic diagram

How to carry out water treatment?

working principle:
The sand water separator is mainly composed of shaftless spiral, lining strip, U-shaped groove, water tank, guide plate, and outlet weir drive device. The sand water mixture is input into the water tank from the top of one end of the separator. Heavy particles such as sand particles in the mixture will settle at the bottom of the groove. Under the push of the spiral, the sand particles will lift along the inclined U-shaped groove bottom and continue to move a certain distance away from the liquid surface. After the sand particles are fully dehydrated, they will be discharged into the sand bucket through the sand discharge port. The water separated from the sand is discharged from the overflow outlet and sent to the inlet water tank in the factory.
The sand water separator equipment is usually set at an inclination angle of 20-30 degrees. The sand water mixture enters the equipment from the water supply pipe, and the mixture passes through the condenser at the upper part of the separator to separate the sand particles and organic matter in the mixture under the action of water flow. The sand and water enter the sand collection tank, and the particles with a larger proportion (such as sand particles) settle to the bottom of the spiral groove due to their own weight, and are pushed by the spiral blades. The material rises along the bottom of the inclined U-shaped groove, leaves the liquid surface, and then moves a distance. The moisture in the sand particles flows through the gap of the spiral groove and returns to the water tank. The sand particles also gradually dry and enter the discharge outlet. Due to their own weight, they fall into other conveying devices. The supernatant continuously overflows from the drainage weir through the pipeline, while the organic matter flows out from the top of the collector under the action of the water vortex and flows back to the sewage well through the pipeline, thus achieving the purpose of sand water separation.

1. The sedimentation device and sand transport device of the sand water separator are enclosed integrated structures, and have the characteristics of compact structure, light weight, high work reliability, and low maintenance workload.
2. The separation efficiency of the sand water separator can reach 96% to 98%, and particles with a particle size of ≥ 0.2mm can be separated with a recovery rate of not less than 98%; The removal rate of gravel with a diameter greater than 0.1mm shall not be less than 80%.
3. Under normal circumstances, the sand water separator matches the performance of the sand pump between the pump type sand settling machine and the sand storage room. When necessary, it can also run continuously.
4. The material of important components such as the shell, bracket, and sand feeder of the sand water separator is made of stainless steel. The conveying spiral in the U-shaped groove is a shaftless spiral, designed for material flow without blockage. The shaftless spiral has sufficient strength and stiffness, and will not deform or elongate under working loads.
5. The support bearing of the shaftless spiral is waterproof, dustproof, wear-resistant, and automatically lubricated.
6. The separation tank of the sand water separator is made of 304 stainless steel processed and welded, with a semi-circular bottom, used to support the screw conveyor. The water inlet and overflow pipe are installed at the upper part of the container, and the drainage pipe is installed at the lower part for easy maintenance. All fittings and flanges are made of stainless steel.
7. The design of the inlet and outlet pipe diameter of the sand water separator can prevent blockage by debris in the water.
8. The configuration of the sand water separator and auxiliary components is suitable for both continuous and intermittent work requirements.
9. The U-shaped spiral groove is equipped with a sufficient number of replaceable lining bodies, with a simple structure, long service life, and easy replacement.
10. There are no high-speed running parts in the equipment, so the screw wear is low and almost no maintenance is needed.
11. The driving device adopts a shaft mounted reducer, and the output shaft is directly connected to the screw. The protection level of the driving motor is IP55, and the insulation level is F.

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