1. Sludge flocculation

In order to improve the dewatering of sludge, improve the nature of the filter cake, and increase the permeability of the material, it is necessary to carry out chemical treatment on the sludge, this machine uses the unique device of "flocculation granulation mixer in water" in order to achieve the effect of chemical dosing flocculation, this method not only has good flocculation effect but also saves a large number of pharmaceuticals, with low operating costs and very obvious economic benefits.

2. Gravity concentration and dewatering area

The sludge is evenly fed into the mesh belt through the fabric hopper, the sludge runs forward with the filter belt, and the free water flows into the receiving tank through the sincere belt under the action of self-weight, the gravity dewatering can also be said to be the highly concentrated section, and the main function is to take off the free water in the sludge, so that the mobility of the sludge is reduced, and to make preparation for further extrusion.

3. Low-pressure/medium-pressure dewatering zone

After gravity and dewatering, the sludge mobility is almost completely lost. With the forward running of the filter belt, the sludge is brought into the porous roller by the wedge zone, the spacing between the upper and lower filter belts is gradually reduced, the filtrate starts to overflow from the two sides of the filter belt, and with the running of the filter belt, the pressure is gradually increased. As the belt runs, the pressure gradually increases. The function of the wedge zone is to prolong the gravity dewatering time, increase the extrusion stability of the flocs, and prepare for entering the pressure zone.

4. To the pressure silver (or with) high-pressure dehydration area

The sludge enters the high-pressure zone after leaving the medium-pressure zone, forming the filter cake with high solid content. Material from the wedge-shaped area into the pressure area, the material in this area by the extrusion, along the running direction of the belt pressure with the reduction of the diameter of the extrusion of the clip and increase the volume of the material by the extrusion of contraction, the sludge in this area by the 1-3 groups of pairs of pinch rollers (or belt) extrusion, after strong extrusion of the volume of the substantial contraction of the sludge within the gap of the free water is fully squeezed out to form a cake, and continue to go forward to the end of the high-pressure zone after the high-pressure After the high pressure, the water content of the filter cake can be minimized.

The belt press filter is mainly composed of a driving device, frame, press roller, upper filter belt, lower filter belt, filter belt tensioning device, filter belt cleaning device, and discharging device. gas control system. electrical control system. sludge is pumped into a dynamic (static) mixer, mixed with the anion (yang) ion flocculant solution added at the same time fully reacted, and then coagulated into a larger flocculent mass. The surface water of the material is separated into free water. The material is transported through the filter net of the first gravity pre-dewatering zone (or on the belt concentrator) and gravity is removed. Aftergravity dewatering, the fluidity of sludge becomes worse obviously, but it is still difficult to meet the requirement of sludge fluidity in the pressing dewatering section. Therefore, a wedge-shaped pre-pressing dewatering section is added between the pressing dewatering section and the gravity dewatering section of the sludge, and the sludge is dewatered by slight extrusion in this section. Removal of free water from its surface almost completely loses its fluidity, which ensures that sludge will not be extruded in the pressing dewatering section under normal conditions, creating conditions for smooth pressing dewatering.

There are many different types of sludge machines in the sludge treatment field that are used to treat and dispose of sludge (the solid waste produced during wastewater treatment processes). The mud-water mixture entering the sludge machine has a solid content of 0.5-5% and a moisture content of 99.5-95%. The solid content of the sludge is generally 22%-17% and the moisture content is 78%-83% (general sewage treatment equipment). clay machine)

Common types of sludge treatment machines

Sludge Thickener: used to reduce the moisture content in thin sludge, thereby reducing the sludge volume.

Sludge Dewatering Machine : used to further remove the water from the concentrated sludge and turn the sludge into drier solid matter, usually using mechanical pressing, centrifugal separation or other methods.

Sludge Dryer: used to further dry the dehydrated sludge, usually through heating or drying airflow.

Sludge pyrolysis equipment: used to pyrolyze sludge at high temperatures and convert it into ash, which is usually used for large-scale treatment and disposal.

Anaerobic Digester: The organic matter in the sludge is decomposed into biogas and digested sludge through the action of microorganisms, which can be used for energy production or sludge reduction treatment.

Sludge anaerobic oxidation equipment: similar to a digester, but operates under aerobic conditions, helping to decompose organic matter in the sludge.

Centrifuge: Use centrifugal force to remove water from sludge to obtain higher dry solid waste.

Belt Press: Uses belt filtration and pressing technology to dewater sludge and is suitable for large-scale treatment.

Sludge Conveyors: Equipment used to transfer sludge from one treatment stage to another, which can be screw conveyors, belt conveyors, etc.

The selection of these machines depends on the nature of the sludge, the scale of treatment and the desired final treatment results. In wastewater treatment and sludge management processes, multiple types of sludge machines are often used to complete different treatment steps. If you need it, please contact us to choose the equipment that suits you.

Regular maintenance: Regularly inspect and maintain the screw stacking machine, including cleaning the screw shaft, checking bearings and seals, to ensure the normal operation of the machine. Follow the manufacturer's maintenance recommendations.

Handle proper feed: Ensure the sludge entering the screw stacker is appropriate, including sludge concentration and properties. If the sludge concentration is too low, the dewatering effect may be affected.

Adjust operating parameters: Adjust the operating parameters of the screw stacker according to different situations, such as screw shaft speed, extrusion degree and mud discharge speed. Optimization of these parameters can improve dewatering performance.

Regular cleaning: Clean all parts of the screw stacker, especially the screw shaft and screw plate, to prevent build-up and clogging.

Monitor current and voltage: Regularly monitor the current and voltage of the screw stacker to ensure that the motor is operating properly. Abnormal current or voltage may indicate a problem with the machine.

Processing of dehydrated concentrate: Process the dehydrated concentrate to ensure that it meets environmental requirements. Occasionally, concentrates may require further processing or disposal.

Train operators: Train operators to ensure they understand the normal operation and operating points of the screw stacker. Training helps reduce incorrect operations.

Regularly check the mud discharge device: Ensure that the mud discharge device of the snail stacker is operating normally and eliminate possible faults in a timely manner.

Record operating data: Record the operating data of the snail stacker, including feed volume, mud discharge volume, current and voltage, etc., in order to analyze and monitor performance.

The above matters will help ensure the normal operation of the snail stacker and improve the dehydration efficiency. According to the specific machine model and sludge characteristics , an operation and maintenance plan suitable for the machine will be further developed. If you encounter problems, please consult us or professional technicians for help in time.

Operating Procedures and Daily Operational Precautions for the Spiral Sludge Dewatering Machine

1 . Inspection before starting the equipment

The screw stacker can efficiently dewater sludge, reduce waste volume, and reduce waste disposal costs. It usually has an automated control system that can adjust operations as needed, reducing operator intervention and reducing labor costs. In order to ensure the good operation of the sludge dewatering screw press, equipment inspection is essential.

First check whether there are any debris in the mixing tank , secondly check whether the filter body has drained out sludge , and finally check whether there are large pieces of mud at the head of the spiral shaft.

2 . Equipment usage steps

PAM flocculation agent into the preparation system and turn on the stirring device at the same time:

(1) Use a nozzle to manually clean the moving and fixed ring pieces on the main body of the snail stack for about two minutes .

(2) Turn on the drive motor of the main body of the sludge dewatering screw press and check whether its rotation direction is correct. The main body of the snail stacker needs to be sprayed for 1-2 minutes.

(3) Turn on the flocculant supply pump and start working. At the same time, the mud pump and flocculation stirring motor must be turned on and run together;

(4) The above operations are all ok. Start adjusting the mud inlet volume , the rotation speed of the main spiral shaft , and the plate spacing of the mud outlet bucket to optimize the mud outlet volume and sludge moisture content.

(5) Finally, check whether there is any abnormality in the rotation of the screw shaft , whether the mud level in the mixing tank is too low or too high, and whether there is any abnormal noise from any part of the equipment during operation. If the above abnormality occurs, stop the operation immediately and conduct maintenance.

3. How to choose the model of sludge machine

Determine treatment capacity: The most important thing is to determine the amount of sludge you need to process. This is usually measured in terms of processing capacity per hour (usually expressed in cubic meters/hour or tons/hour). Make sure the sludge dewatering screw press model you choose has enough processing power to meet your needs.

Understand the properties of sludge: Different types of sludge may require different models of sludge dewatering screw press. Understand the properties of the sludge you are handling, including solids content, particle size and concentration , so you can choose the right snail stacker.

Consider dryness requirements: Determine your dryness requirements for your dewatered sludge. Different models of sludge dewatering screw press can achieve different degrees of dehydration, thus affecting the final sludge dryness.

Understand the power and energy requirements: Understand the power and energy requirements of your chosen sludge dewatering screw press to ensure your facility can meet these needs.

When choosing a sludge dewatering screw press, it is best to consult a professional engineer or wastewater treatment expert for advice on the best option. We can provide customized advice based on your specific circumstances and needs to ensure that the sludge dewatering screw press will meet your requirements .

What is a screw stacking machine?

Screw stacking machine is the abbreviation of screw stacking sludge dewatering machine . It is widely used in municipal treatment projects and water treatment systems in petrochemical, light industry, chemical fiber, papermaking, pharmaceutical, leather and other industrial industries.

This equipment integrates a fully automatic control cabinet , a flocculation conditioning tank , a sludge concentration and dehydration body and a liquid collecting tank . It has the characteristics of efficient and stable operation and can automatically complete efficient flocculation , sludge concentration , press and dehydration without any supervision. , filtrate reflux or discharge and a series of actions , making it widely used in the field of sludge treatment.

The Advantages of Sludge Dewatering Screw Press

Efficient dehydration : The screw stacker can efficiently separate water from sludge through the principle of mechanical extrusion. This results in discharged sludge with a higher solids content, reducing wastewater treatment and disposal costs.

Compact design : Screw stacking machines usually have a compact design and occupy a relatively small footprint. This is very beneficial for sludge treatment facilities with limited site space.

Automated control : Modern snail stackers are often equipped with advanced automated control systems that can monitor and adjust the dewatering process to ensure optimal performance and energy efficiency.

Stability and reliability : The mechanical structure of screw stacking machines is relatively simple, so they are usually very stable and reliable and require less maintenance.

Strong adaptability : The screw stacking machine is suitable for various types of sludge, including sewage treatment plants, industrial sludge, urban sludge, etc. They can handle sludge of different properties and concentrations.

Energy conservation : Compared with traditional sludge dewatering methods, snail stackers are generally more energy efficient because they do not require large amounts of chemicals to assist dewatering.

Reduce waste disposal costs : By increasing the solids content of the sludge, the screw stacker can reduce the costs of waste treatment and disposal, such as reducing transportation and landfill expenses.

NIHAO Sludge Dewatering Screw Press

The screw-stacked sludge dehydrator is equipped with a specially designed screw-stack body. It has an exquisite design and a variety of product models , covering ultra-small models with a processing capacity of 0.5kg-DS/h to ultra-large machines with a processing capacity of 1,320~ 1,360kg -DS/h. type , providing the most appropriate technical solution according to the customer's actual processing capacity needs to achieve the goal of efficient and energy-saving dehydration. You are welcome to consult our professional design team at any time to choose a suitable sludge dehydrator for you.