Sludge Dehydrator Screw Press For Wastewater Treatment
As everyone knows, wastewater generated in industrial activities must be treated before being discharged into the local sewage system, returned to its natural environment, or as a prior step to its reuse. So wastewater treatment is very necessary.
IEPP Sludge Dehydrator Screw Press is the most effective dewatering method for municipal sewage treatment plants and industrial sewage sludge containing various fats, fibers, and abrasive substances. Dewatered sludge treated in the dehydrator achieves a residual moisture content of 60-82%. It produces a filter cake with excellent water quality and high dewatering content, resulting in reduced sludge volume. The actual operation shows that sludge dewatering can create considerable economic and social benefits for customers.
What is Sludge Dehydrator Screw Press？
The screw type sludge dewatering machine belongs to the screw type press dewatering machine, which does not need sedimentation tank and sludge thickening tank, and can save the construction cost of sewage station. The spiral sludge dehydrator can make good use of the automatic renewal filter cake filtration technology that can replace the original filter screen filtration. Its own renewal filter cake filtration technology makes the mud and water separation of the dehydrator stable and continuous. The extrusion force generated under the constant change of screw diameter and pitch, as well as the smaller gap between the fixed ring and the floating ring, can achieve the effect of extrusion sludge dewatering. The equipment under this technology is relatively new solid-liquid separation equipment.
How it works?
The main part of the sludge dehydrator screw press is stacked with a fixed ring and a swimming ring. The front part is the concentration part, the filtration device is formed by the spiral shaft, and the back part is the dehydration part. The filter gap formed between the fixed ring and the floating ring, and the pitch of the spiral shaft gradually decreasing from the concentration part to the dehydration part; The rotation of the spiral shaft enables the sludge to be transported from the thickening part to the dewatering part. In addition, it also continuously promotes the traveling ring to clean the filter joints to prevent clogging. After the sludge has experienced the concentration under the action of gravity, it is brought to the dewatering part, in the process of continuous progress, the filter gap and pitch will gradually become smaller, and then through the blocking effect from the back pressure plate, in order to produce a relatively large internal pressure, the volume will become smaller and smaller, which will complete the sludge dewatering.
1.Concentration: When the spiral drive shaft rotates, the multiple solid live laminates located outside the push shaft move relative to each other, and under the action of gravity, water filters out from the relative moving laminates gap to achieve rapid concentration.
2.Dehydration: the concentrated sludge moves forward continuously with the rotation of the spiral shaft; Along the exit direction of the mud cake, the pitch of the spiral shaft gradually decreases, the gap between the rings also gradually decreases, and the volume of the spiral cavity keeps shrinking. Under the action of the back pressure plate at the outlet, the internal pressure is gradually enhanced, and under the continuous operation of the screw driving shaft, the water in the sludge is extruded and discharged, and the solid content of the filter cake is continuously increased, and the continuous dehydration of the sludge is finally achieved.
3.Self-cleaning: The rotation of the spiral shaft drives the floating ring to rotate continuously, and the equipment relies on the movement between the fixed ring and the floating ring to achieve a continuous self-cleaning process, thus subtly avoiding the blockage problem common in the traditional dehydrator.
Structural Composition
Application
The equipment is widely used in municipal sewage, food, aquaculture, slaughter, paper, printing and dyeing, leather, chemical, pharmaceutical, garbage leachate, coking wastewater, spraying, petrochemical and other industries of sewage treatment, its obvious advantage is that it can treat oily sludge, processing sludge concentration range from 5000mg/L to 50000mg/L.
Technological Advantage
- No clogging, reduce flushing water consumption, save water costs, reduce the internal circulation burden caused by washing water backflow, and easily handle oily sludge.
- The operation management is simple, the automatic 24-hour operation is realized, and the labor intensity of the operator is reduced.
- It can be applied to a wide range of sludge concentrations, up to 5000-5000mg /L.
- Electric control cabinet, flocculation mixing tank and dehydration main body integration, reduce the footprint, easy to install
- The dehydrator is basically in closed operation, and the treatment is stable and timely, so that the odor of the site is reduced to the minimum, and the working environment of workers is improved.
- The running speed of the spiral shaft is low, 2-3 revolutions per minute, low power consumption, and there is basically no vibration and noise on the scene.
Q&A
- Does sludge need to be flocculated in advance?
The sludge produced in the sewage treatment is a colloidal structure of hydrophilic substances, with high organic content, fine particle glue, small density, high moisture content, not easy to dehydrate. Therefore, it is necessary to add polyacrylamide as a flocculant, fully regulate the sludge, improve its dewatering performance, and then pass into the sludge dehydrator screw press to meet the requirements of continuous work.
- Is the moisture content of dehydrated sludge high?
Generally in actual operation, because the water quality changes with the seasons or changes in the process, there are many uncontrollable factors, and the moisture content of the mud cake cannot be guaranteed by the adjustment ability of the equipment itself. Therefore, it is sometimes necessary to manually adjust the flushing water valve, turn it down when the water volume is large, and open it up when the water volume is small, so as to ensure that the dehydrated mud cake has a stable and qualified moisture content.
- Will the mud pipe clog?
In addition, mud pipe blockage is also a common problem in the operation of the equipment. The main reasons are: on the one hand, the large debris contained in the sludge is not filtered away by the large and small grilles and sand settling equipment in the previous water treatment process, but it enters the mud pipe with the sludge, causing blockage or even jamming the equipment. This often requires manual cleaning or maintenance. On the other hand, seasonal reasons, after the temperature reaches below zero in winter, the fluidity of the sludge becomes worse, at this time, it is necessary to pay attention to the insulation of the sludge pipeline to ensure the effective fluidity of the sludge; When the temperature is higher in summer, the sludge is easy to dry and harden, which is easy to lead to pipe blocking, at this time, it is necessary to add water to guide the sludge flow, and adjust the speed of the mud pump to make the sludge enter the dehydrator stably and efficiently.
If you also have wastewater treatment needs, please contact us to analyze your case and find an efficient solution for wastewater treatment, through the contact form on our website, or by writing directly to us at cniepp@gmail.com.
Related Reading:Wastewater Treatment: An Essential Step towards Environmental Protection and Improved Quality of Life