Stacked Snail Sludge Dewatering Machine

After the sludge is concentrated by gravity in the enrichment section, it is transported to the dehydration section. During the advancement process, as the filter joint and the pitch gradually become smaller, and the back pressure plate blocks, the internal pressure is generated, and the volume is continuously reduced. The purpose of dehydration.

1. The main body of the dehydrator is a filter device formed by a fixed ring and a swimming ring stacked on each other, and a screw shaft is formed therethrough. The front part is a concentrated part, and the rear part is a dewatering part.
2. The filter slit formed between the retaining ring and the swimming ring and the pitch of the screw shaft gradually become smaller from the concentrating portion to the dehydrating portion.
3. The rotation of the screw shaft drives the sludge from the enrichment section to the dewatering section, and also continuously drives the swimming ring to clean the filter joint to prevent clogging.
4. After the sludge is concentrated by gravity in the enrichment section, it is transported to the dehydration section. During the advancement process, as the filter joint and the pitch gradually become smaller, and the back pressure plate blocks, a large internal pressure is generated. Constantly shrinking to achieve the goal of adequate dehydration.

Sludge treatment process description

1. Determine the type of flocculant and the proportion of dosing by matching the flocculation experiment. If it is necessary to use two flocculants to effectively flocculate, it is recommended to select a dewatering machine with two flocculation mixing tanks. A stirring device shall be arranged in the sludge tank. The sludge shall be continuously stirred before and during the operation to ensure the sludge concentration is relatively stable.
2. Before running the dewatering machine, the flocculant solution should be brewed with the foaming device. The normal dilution factor of the polymer flocculant is 500-1000 times. The sludge passes through the sludge transfer pump, and the brewed flocculant is simultaneously fed into the flocculation mixing tank through the dosing pump according to the corresponding ratio, and is fully mixed by the mixer to form the scented flower, and the gravity is concentrated in the concentrated portion, and the filtrate is filtered. The filter is discharged from the concentrating section. The filtrate has a low solid content and is directly returned to the original pool.
3. The concentrated sludge is advanced forward along the spiral axis, and is sufficiently dehydrated in the dehydration section by various combined forces. The filtrate of the dewatering section has a high solid content and can be refluxed to the flocculation mixing tank for dehydration again.
4. The dehydrated mud cake is discharged from the mud cake discharge port and sent to the mud truck directly or through a shaftless screw conveyor for reuse.

Eight advantages

1) Widely used
It   can be widely used in sludge dewatering in municipal sewage, food, beverage, slaughter breeding, printing and dyeing, petrochemical, paper making, leather, pharmaceutical and other industries;

The unique dehydration principle makes the equipment suitable for high and low concentration sludge. Starting from 2000mg/L, it has created a precedent for direct dewatering of low concentration sludge;

Innovative structural design makes the equipment suitable for all types of sludge with high and low viscosity, especially oily sludge. It is a tool for dewatering oily sludge.

2) Not easy to block

Unique dynamic and static ring filter joint structure makes the equipment not easy to block, no need to clean the filter joints, reduce the flushing water consumption, reduce the internal circulation burden, and solve the troubles caused by the traditional dewatering equipment blockage.

3) Continuous automatic operation

The snail sludge dewatering machine adopts automatic control from pumping out sludge, injecting liquid medicine and discharging sludge cake, and through the electric control cabinet, it is linked with the bubble medicine machine, the mud pump, the dosing pump, etc., without personnel operation. Equipment, operation will not block, filter belt deviation or other phenomena that affect the safety of the process, daily maintenance and maintenance is simple, 24 hours continuous unmanned operation. For the first time, the continuous automatic operation of sludge dewatering in the true sense was realized.

4) Save operating costs
Integrated overall design, compact design, and significant savings in operating costs. The low-speed screw extrusion technology makes the power consumption greatly low; the equipment is not blocked, the flushing water is greatly reduced; the 24-hour automatic unmanned operation, the labor cost is greatly reduced. Therefore, this equipment has also truly become a new energy-saving and environmental protection equipment in line with national policies.

5) No secondary pollution
The rotation speed of the screw shaft is about 2~3 rpm, no vibration, and the noise is very small. The laminated piece has self-cleaning function, no clogging problem, only a small amount of water washing, no secondary water pollution; The mud runs under such a slow working condition, and the odor does not spread, thus creating a very good working environment!

6) The body is light and durable
Due to the direct use of mechanical extrusion dewatering, it does not require large bodies such as rollers. Therefore, the machine is designed to be quite lightweight. The body is almost entirely made of stainless steel. The replacement parts are only screw shaft and swimming ring, which has long service life and durability.

7) Save engineering investment

The snail sludge dewatering machine itself has a sludge concentration function, which directly treats the aerobic sludge in the aeration tank, does not require a concentration and storage unit, and reduces the overall land occupation and construction cost of the sewage treatment facility.

8) Improve phosphorus removal capacity

The sludge is dehydrated under aerobic conditions, and the release of sludge phosphorus in the traditional sludge concentration tank or storage tank under anoxic or anaerobic conditions does not occur, thereby improving the phosphorus removal function of the entire sewage treatment system.