Screw Press Sludge Dewatering Machine Selection

Screw Press Sludge Dewatering Machine Sludge Discharge Speed Adjustment

Screw Press Sludge Dewatering Machine

Highly automated, operates 24/7 unattended, and is not prone to clogging, takes up minimal space, has low operation costs, and a long service life. Note the following when adjusting the sludge dewatering machine's mud discharge speed: 1. Most screw presses are equipped with variable-frequency motors, which can be adjusted via a variable-frequency drive, typically running at 2-3 RPM. 2. Adjust the mud discharge speed based on the requirements, as higher RPMs will increase the moisture content and volume of the discharged mud, while lower RPMs will reduce the volume but dry the mud more. Aim for the balance point that suits your needs. 3. Do not set the back pressure plate gap too narrow, as it can hinder timely sludge discharge and lead to shaft clogging. The gap should be above 1.2 cm. 4. Consider the sludge properties when adjusting the discharge speed; for inorganic sludge with a high content, choose a faster speed to avoid shaft clogging. Inorganic sludge is prone to drying, and once dried, it's harder to be discharged from the dewatering unit.

Advantages of the Screw Conveyer

Screw Press Sludge Dewatering Machine

Advantages of the screw press:

1. Competitive Pricing: The small-scale screw press is priced at just $20,000 to $30,000, which is significantly cheaper than traditional mud presses, often costing over $100,000.

2. Continuous Operation: The machine can operate 24/7 without interruption, as long as the parameters are properly set, and the PLC system is configured to meet the manufacturer's requirements, which can significantly reduce the need for manual labor.

3. High-Quality Product: The screw press is made entirely of 304 stainless steel, significantly enhancing its wear and durability, ensuring at least three to five years of reliable use.

4. Wide Application: Can handle sludge from almost all industries, with particularly good performance in activated sludge treatment.

Screw Press Sludge Dewatering Machine Components:

1. The main body of the screw press sludge dewatering machine consists of a filter device made up of interlaid fixed rings and moving rings, with a spiral shaft running through them.

2. As the screw shaft speed is reduced, the sludge retention time within the screw-concentrating element increases, resulting in a lower moisture content in the resulting sludge cake and a decrease in the cake production. Conversely, when the screw shaft speed is increased, the sludge retention time within the element shortens, leading to a higher moisture content in the sludge cake and an increase in cake production.

3. The main screw body is equipped with a spray system. In automatic operation, the solenoid valve can be turned on or off at set intervals. The South screw mud press filter performs irregular spraying to maintain the appearance of the dewatering machine. The main body of the screw has side covers to prevent mud and water splashes. Solid-liquid separation is achieved through the main screw body, with the filtrate exiting through the filter slots formed by the fixed and floating rings. During normal operation, the treated sludge is discharged in the form of sludge cakes. For the price of the screw mud dewatering press, large-scale equipment is recommended to use screw conveyors or other direct and timely methods to transport the sludge cakes for transportation or further processing.

Principle of Dewatering by Screw Press Sludge Dewatering Machine

Sludge is transported to the dewatering section after gravity thickening in the thickening department. As it progresses, the screw press experiences a significant internal pressure due to the gradual reduction in sieve gap and screw pitch, as well as the obstruction of the back pressure plate. This results in a continuous decrease in volume, achieving the goal of thorough dewatering.

1. Concentration: As the spiral drive shaft rotates, the multiple fixed and sliding blades around the drive shaft move relative to each other. Under the force of gravity, water is filtered out through the gaps between the moving blades, achieving rapid concentration.

2. Dewatering: The concentrated sludge moves forward continuously as the screw shaft rotates; along the direction of the sludge cake outlet, the pitch of the screw shaft gradually decreases, and the gap between each ring also narrows, resulting in a continuously shrinking volume of the screw chamber in the sludge press filter; under the action of the back pressure plate at the outlet, the internal pressure gradually increases. Driven by the sequential and continuous operation of the screw drive shaft, the moisture in the sludge is compressed and expelled, leading to a continuous increase in the solid content of the filter cake, ultimately achieving the continuous dewatering of the sludge.

3. Self-cleaning: The rotation of the spiral shaft drives the floating ring to continuously rotate, enabling the equipment to achieve a continuous self-cleaning process through the movement between the fixed and floating rings, thereby ingeniously avoiding the clogging issue commonly found in traditional centrifugal dryers.

4. Screw Conveyer Operation

Start the machine first, then activate the spray device. Sludge enters from the sludge inlet. If the flow is too high, excess sludge water will return through the overflow outlet to prevent spillage.

Then, it flows into the flocculation mixing tank, where it blends with the flocculant to form vanadium flowers. It then enters the dewatering main body for concentration and dewatering. Clean water flows out through the gaps of the static and dynamic ring segments into the collection tank, while the sludge is compressed in the direction of the screw conveyor, reducing space and increasing internal pressure, making the sludge drier and eventually discharged through the sludge outlet.

Before shutting down, the spray system should be activated half an hour earlier to clean the sludge and debris from the spiral shaft and the stationary and rotating ring segments. The complete operation of the screw press is fully automated, saving costs.

Zhucheng Screw Press Sludge Dewatering Machine - Hengman Environmental Protection - The screw press sludge dewatering machine company is provided by Dezhou Hengman Environmental Protection Technology Co., Ltd. Dezhou Hengman Environmental Protection Technology Co., Ltd. is an enterprise engaged in "screw press sludge dewatering machine, microfiltration solid-liquid separator." The company adheres to the philosophy of "honest operation, dedicated service" and offers you better products and services. Welcome to call for inquiries! Contact: Manager He.