Sand field mud dewatering machine (professional name: horizontal spiral discharge settling centrifuge)

Zhejiang Zhengda Environmental Protection - Working Principle of Horizontal Spiral Centrifuge

The purpose of sand field mud dewatering machine separation is to separate solid substances in the mixed fluid with a specific gravity greater than that of the liquid phase fluid from the liquid phase fluid.

When the mixed liquid enters the inner cavity of the high-speed rotating drum through the feeding port, the solid substances with higher specific gravity in the mixed liquid quickly settle to the inner wall of the drum under the action of centrifugal force, and are discharged from the drum body through the solid phase outlet by the spiral pusher; At the same time, the liquid phase with a smaller specific gravity forms an inner liquid ring under the action of centrifugal force, and is discharged from the outside of the drum through the liquid overflow port. The drum and the screw pusher operate at high speed simultaneously, and due to the certain speed difference between the two, the solid substances settled on the drum wall are continuously pushed by the screw pusher to the outlet for discharge, and the entire separation process continues.

Zhejiang Zhengda Environmental Protection - Schematic Diagram of Horizontal Spiral Centrifuge Structure

Horizontal spiral centrifuge, also known as horizontal spiral discharge settling centrifuge, uses the centrifugal acceleration generated by high-speed rotation to rapidly settle solid particles in the liquid and deposit them on the inner wall of the drum. After the material is pumped into the chamber through the feed pipe, the drum and the screw conveyor rotate at high speed in the same direction with differential speed, causing the solid to settle on the inner wall of the drum, and then discharged through the screw conveyor. The clarified liquid phase is discharged from the outlet weir at the other end of the drum, thus achieving continuous feeding, separation, and unloading of the material, and ultimately achieving the effect of solid-liquid separation.

Zhejiang Zhengda Environmental Protection - Structural Characteristics of Horizontal Spiral Centrifuge

1. Large aspect ratio and high rotational speed. A drum cone structure with multiple angles;

2. The feeding spiral adopts special wear-resistant measures, which can be sprayed with hard alloy protective layer or embedded with hard alloy wear-resistant sheet;

3. Effective avoidance of resonance zone phenomenon during high-speed rotation of dual rotors: Within the design speed range, there is no obvious first-order or second-order resonance zone phenomenon during the operation of the whole machine, and the full vibration intensity of the bearing seat is controlled between 2mm/s and 4mm/s. Avoiding additional fatigue damage to various components of the equipment caused by high-frequency vibration.

4. Differential selection: Choose planetary gears or hydraulic differentials with heavy loads and large transmission ratios;

5. Host bearing selection: Select products from international top brands such as SKF from Sweden and NSK from Japan.

6. Main bearing lubrication system: A、 Thin oil lubrication B、 grease

7. Constant temperature inspection: All precision machined parts of the entire machine are inspected under constant temperature conditions to ensure that the actual machining quality meets the design accuracy requirements.

8. GSRL high-speed feeding device: By adjusting the internal design of the spiral core tube, without reducing the centrifugal acceleration of the original separation solution, the following time of the material entering the centrifuge is shortened, the vortex disturbance is reduced, the effective separation time of the material inside the centrifuge is extended, and the separation efficiency is improved. This achieves a 15% -25% increase in processing capacity while reducing the required separation speed by 10% -12%. At the same time, it can increase the working pressure inside the centrifuge and inhibit the production of liquid foam.

9. A microcomputer control system that can automatically adjust differential speed and torque with changes in material concentration and flow rate;

10. The horizontal spiral sedimentation centrifuge with BD board can concentrate, dehydrate and separate difficult to separate materials from various ratios of primary sedimentation and activated sludge.

Zhejiang Zhengda Environmental Protection - Application Fields of Horizontal Spiral Centrifuge

Zhejiang Zhengda Environmental Protection - Horizontal screw sedimentation centrifuge dual motor dual frequency series - Main technical parameters

Note:

1. The above data is based on low concentration urban sewage as a reference material, and the specific performance may vary depending on the characteristics of the material.

2. The concentrator referred to in the table is mainly used for sludge concentration (non dewatering).

3. The above data is for reference only, and no further notice will be given if there are any changes.