Features and Working Principle of Spiral Sand Water Separator:

The sedimentation and sand conveying units of the spiral sand-water separator are a closed, integrated structure, featuring compact design, lightweight, high operational reliability, and minimal maintenance workload.

Helical sand-water separator with a separation efficiency up to96%～98%Separable to particle size ≥0.2nnGrains, with a recovery rate not less than98%Dia. over0.1mmThe sand and gravel removal rate is not less than80%。

The spiral sand-water separator's inlet and outlet pipe diameter design prevents clogging of water impurities.

The spiral sand-water separator and auxiliary parts configuration meets the requirements for both continuous and intermittent operations.

UThe type features a spiral groove fitted with a sufficient number of replaceable linings, boasts a simple structure, long service life, and ease of replacement.

There are no high-speed moving parts in the equipment, resulting in low screw wear and almost no need for frequent repairs.

The drive unit features an axle-mounted reducer, with the output shaft directly connected to the helical gear.

Spiral sand-water separator with shaftless spiral, strips,UComposed of form slots, water tanks, flow-directing plates, and drive mechanisms, etc. When the sand-water mixture is input into the water tank from the top end of the separator, larger particles such as sand will settle.UAt the bottom of the mold, under the push of the spiral, sand particles follow the slantedUThe mold bottom is elevated, and it continues to move a distance after leaving the liquid surface, discharging the sand through the sand outlet after the sand particles are fully dehydrated.

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Duwan Environmental Three-Phase Spiral Sand and Water Separator

Slurry Pool Sand-Water Separator Introduction

The sedimentation pond's function is to remove relatively dense inorganic particles (such as mud, coal slag, etc.). Typically, sedimentation ponds are set before pump stations and siphon pipes to reduce wear on pumps and pipelines by these particles. They can also be placed before sedimentation ponds to alleviate the load on the sedimentation pond and to eliminate the impact of particles on anaerobic digestion of sludge.

The pipe carrying the slurry enters the pool, where inorganic particle settle at the bottom due to gravity, resulting in generally poor treatment effects. One significant advantage of the aeration sedimentation tank is that it allows sand particles to rub against each other under aeration, effectively removing organic pollutants adhered to the sand particles. Additionally, due to the air flotation effect of aeration, oil and grease substances in the wastewater rise to the surface to form scum and are removed. For wastewater treatment plants designed for biological phosphorus removal, aeration sedimentation tanks are generally not used to ensure phosphorus removal efficiency. In recent years, the vortex sedimentation tank, which is increasingly widely used, controls flow state and velocity with mechanical force. Its main advantages include a small footprint, minimal impact of water volume changes on sedimentation, excellent sand-water separation, low moisture content in the separated sand, low organic content, and ease of transportation. Considering that the design flow rate for this project is relatively small, flow fluctuations have a significant impact on the horizontal sedimentation tank, so it is not used. Moreover, it does not meet the shallow water depth requirements of the aeration sedimentation tank. Therefore, a vortex sedimentation tank is adopted. However, it should be noted that the spacing of the fine格栅 should be as small as possible to prevent the entry of objects like strips from affecting the impeller and other devices such as the sand lifting pump. The vortex sedimentation tank is a type of vortex sedimentation tank, consisting of an inlet, outlet, sediment separation area, sand collection area, sand lifting pipe, sand discharge pipe, electric motor, and transmission box, etc. Wastewater enters the sedimentation area along the tangential direction from the inflow, and the impeller and inclined blade rotate under the action of the electric motor and transmission device, with the centrifugal force throwing the denser sand grains towards the pool wall and into the sand hopper, while organic matter remains in the water. Adjusting the rotational speed achieves a reasonable sedimentation effect. The sediment is cleaned with compressed air through the lifting pipe and sand discharge pipe before being discharged. The cleaning water returns to the sedimentation area. 1.2 Process Design: Before entering the sedimentation tank, wastewater is first treated by a fine格栅. Two sedimentation tanks are set up, one in use and one in reserve. The sand removed from the wastewater in the sedimentation tank is conveyed to the sand-water separator by a sand pump (with two pumps in reserve) and then the dewatered sand is loaded into a sand storage box.

Characteristics and working principle of the spiral sand-water separator:

The sedimentation and sand conveying units of the spiral sand-water separator feature a sealed, integrated structure with characteristics such as compact design, light weight, high operational reliability, and minimal maintenance workload.

The spiral sand-water separator achieves a separation efficiency of up to 96% to 98%, capable of separating particles with a size of ≥0.2mm, with a recovery rate of not less than 98%; the removal rate of sand grains with a diameter greater than 0.1mm is not less than 80%.

The spiral sand-water separator's inlet and outlet pipe diameter design prevents clogging of water impurities.

The spiral sand-water separator and auxiliary parts are configured to meet the requirements for both continuous and intermittent operations.

The U-shaped spiral groove is equipped with an adequate number of replaceable linings, featuring a simple structure, long service life, and ease of replacement.

There are no high-speed moving parts in the equipment, hence the screw thread wear is low, and maintenance is almost non-existent.

The drive unit employs an axle-mounted reducer, with the output shaft directly connected to the spiral device.

The Spiral Sand-Water Separator consists of a shaftless spiral, lining strips, U-shaped channels, water tanks, guide plates, and driving units. As the sand-water mixture is introduced into the water tank from the top of one end of the separator, larger particles like sand settle at the bottom of the U-shaped channels. Under the push of the spiral, the sand particles are lifted along the inclined bottom of the U-shaped channels, continuing to move a short distance after leaving the liquid surface. Once the sand particles are fully dehydrated, they are discharged through the sand outlet.

Jiangsu Du'an Environmental Protection Sand and Water Separator Technical Parameters and Installation Dimensions Table mainly includes helix nominal diameter, helix diameter, processing capacity, installation angle, helix speed, motor power, recovery rate, water content after sand separation, and installation dimensions.