Introduction of the Screw Type Sludge Dehydrator

Screw Type Sludge Dehydrator is a kind of water treatment equipment widely used in municipal sewage treatment engineering, petrochemical industry, light industry, chemical fiber, papermaking, pharmaceutical, leather, and other industrial industries. How much do you know about the Screw Type Sludge Dehydrator? Do you want to know? If the answer is yes, then please continue reading. I will take you to find out.

The following is a list of contents:

1. Product Description

2. Construction principle

3. Common problems and precautions

Product Description

The Screw Type Sludge Dehydrator adopts the principle of screw extrusion. The strong squeezing force generated by the change of screw diameter and pitch, as well as the tiny gap between the moving ring and the fixed ring, can squeeze and dehydrate the sludge. It is a new type of solid-liquid separation device.

Construction principle

The main body of the Screw Type Sludge Dehydrator is composed of several fixed rings and a swimming ring, and the filtering device is composed of a spiral shaft passing through it. The front section is a concentration section, and the rear section is a dehydration section. Both sludge concentration and squeezing dehydration are completed in the drum, replacing the traditional filter cloth and centrifugal filtration with a unique and precise filtration method.

1. Concentration: When the screw push shaft rotates, the multiple solids and active layer plates arranged on the periphery of the screw sludge dehydrator push shaft move relative to each other. Under the action of gravity, the water is filtered out from the gap of the relative movement of the laminations to achieve rapid concentration.

2. Dehydration: In the Screw Type Sludge Dehydrator, the concentrated sludge moves forward with the rotation of the screw shaft; along the direction of the mud cake outlet, the pitch of the screw shaft gradually decreases, and the spiral cavity in the gap between the rings The volume keeps shrinking. Under the action of the outlet back pressure plate, the internal pressure gradually rises. Driven by the continuous operation of the screw shaft, the water in the sludge is squeezed out, and the filter cake contains solids. The amount continues to rise, and finally, the continuous dewatering of the sludge is realized.

3. Self-cleaning: the rotation of the screw shaft pushes the moving ring to continuously rotate. The Screw Type Sludge Dehydrator relies on the movement between the fixed ring and the moving ring to complete the continuous self-cleaning process, thereby cleverly avoiding the clogging problem of the traditional dewatering machine.

Common problems and precautions

Sludge from wastewater treatment is a hydrophilic material with a colloidal structure, characterized by high organic content, fine particles, low density, high water content, and not easy to settle. Therefore, it is necessary to add polyacrylamide as a flocculant to fully adjust the sludge and improve its dewatering performance, and then send it to the Screw Type Sludge Dehydrator to meet its continuous working requirements.

After the temperature drops below zero in winter, the fluidity of the sludge becomes worse. At this time, attention should be paid to the insulation of the sludge pipeline to ensure the effective flow of the sludge; when the temperature is high in summer, the sludge is easy to dry and harden, and it is easy to cause the pipeline to block. At this time, it is necessary to add circulating water to guide the sludge flow, and at the same time adjust the speed of the sludge pump, so that the sludge enters the Screw Type Sludge Dehydrator stably and efficiently.

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