Screw Press Sludge Dewatering

Jinhua Shenzhou Centrifuge Co., Ltd. is one of the leading manufacturers and suppliers of screw press sludge dewatering in China. Please feel free to wholesale customized screw press sludge dewatering at competitive price from our factory. For more cheap products, contact us now.

The stacked screw sludge dehydrator is a kind of equipment with compact design, small floor space, low energy consumption, low operation cost, high energy saving, high technical content, easy maintenance and replacement, smallweight and easy handling.

lt is especially suitable for small and medium-sized sewage plants, township sewage plants and sewage treatment sta-tions. The dewatering machine replaces the traditional flter cloth and centrifugal filtering mode with a unique andsubtle flter body mode, reduces the investment cost and improves the treatment efficiency.

During the operation of the equipment, after entering the filter cartridge from the feed port, the sludge moves to the discharge port due to the rotation of the screw shaft and the push of the plate. As the pitch between the screw shaftand the plate decreases gradually, the pressure on the sludge increases continuously, and begins to dehydrate under the action of the differential pressure, and the water flows out of the filtration gap between the fixed ring and the movable ring.

At the same time, the equipment relies on the automatic cleaning function between the fixed plate and the movable plate to clean the gap between the filters to prevent blockage.After the mud cake is fully dehydrated, it is discharged from the discharge port under the propulsion of the screw shaft.

The SZ series sludge dewatering press is mainly composed of metering tank, flocculation mixing tank，mixing device, dehydration main body, filtrate tank, motor, electric control cabinet and support.The water inlet and outlet on the equipment are all configured with flanges to facilitate on-site pipeline connection.

(1) Stacked spirochete

The stacked screw body is composed of fixed ring, traveling ring, spiral shaft, screw, gasket and several connecting plates. The whole stacked screw body is made of stainless steel 304. The fixed ring is connected together through six screws. Gasket and traveling ring are installed between the fixed rings. Both the fixed ring and traveling ring are made of wear-resistant materials, so that the service life of the whole machine is long. The spiral shaft passes through the middle of the fixed ring and traveling ring, And the floating ring is sleeved on the spiral shaft.

The main body is a filtering device formed by multiple fixed rings and swimming rings, through which a spiral shaft passes. The front section is the concentration section and the rear section is the dehydration section, which completes the sludge concentration and pressing dehydration in one barrel, replacing the traditional filter cloth and centrifugal filtration mode with a unique and subtle filter body mode. After gravity concentration in the concentration section, the sludge is transported to the dehydration section. In the process of moving forward, with the gradual reduction of filter joint and pitch and the blocking effect of back pressure plate, great internal pressure is generated, and the volume is continuously reduced to achieve the purpose of full dehydration.

(2) Spiral shaft

The spiral shaft is composed of taper shaft and spiral blade.

Firstly, the spiral blade is cut by laser, and the taper shaft is roughly processed after pouring and forming, and then the spiral blade and the taper shaft are welded by full welding. According to the working condition of the screw stacking sludge dehydrator, the outer circle of the spiral shaft blade is in direct contact with the traveling ring, resulting in friction, and the blade surface is always in contact with the sludge, resulting in some wear. Therefore, The treatment process adopted by our company is: hard material surfacing is applied to the outer circle of the spiral blade, then thermal spraying is applied to the surface of the whole shaft, and then grinding is applied to the outer circle of the spiral blade,. And finish turning the shafts at both ends to ensure the coaxiality and surface finish of the two shafts.

(3) Driving device

The driving device is the power source of the equipment, and the performance of the driving device will directly affect the performance of the whole machine. Therefore, our company selects domestic brands of motor and reducer with superior performance. The protection grade of the motor is IP54 and the insulation grade is f. Explosion proof motors can also be used according to customer requirements, and frequency conversion starting and speed regulation methods can be adopted to adapt to different application conditions and avoid the impact of load.

(4) Filtrate tank

The filtrate tank is welded by stainless steel 304 plates to collect the filtrate filtered by the main body of the screw stack. The periphery of the filtrate tank is connected with the frame body through screws, and a flange is set on the side of the filtrate tank to connect with external equipment.

(5) Hybrid system

It is mainly used to mix the sludge with the main body to form alum for dehydration. The mixing tank is provided with a mud inlet, an overflow port and a vent, and a liquid level regulating device, so that the feed rate of sludge can be adjusted.

(6) Frame body

The frame body is welded by high-strength channel steel, and the surface is treated with anti-corrosion treatment. The overall welding effect is good and the rigidity is good.

The sludge pump pumps the sludge into the mixing tank - the sludge enters the main body of the screw stacker for concentration and dehydration - the sludge is discharged at the pressing plate after being pressed by the screw. Sludge dewatering stage has two parts, one is sludge thickening and the other is sludge dewatering. The first section of the screw stacker body is the sludge thickening section. The pitch of the sludge thickening section is relatively large. The higher the pitch is, the smaller the pitch will be and the greater the pressure will be. Under the continuous mutual movement and extrusion of the moving ring and the fixed ring, the sludge is discharged through the obstruction of the pressing plate.

* Broad applications:

lt is widely used for sludge dewatering in municipal sewage, food, beverage, printing and dyeing, petrochemical, paper making, leather, pharmaceutical and other industries,especially oily sludge.

* Low energy cunsumtion and no noise

There is no need for large bodies such as rollers, andthe speed is low, only 2-4 revolutions per minute.Theunit power consumption is only 0.01-0.1kw H/ kg-ds.Reduce the operation cost of sludge dewatering.

* Non clogging, self-cleaning

Under the action of the rotation of the screw shaft, the moving ring and the static ring are constantly stag gered,so as to realize the continuous self-cleaning process and avoid the blockage of the traditional dehydrator.Therefore, it has strong oil resistance, easy separation,no blockage, no need for high-pressure water cleaningand no secondary pollution.

* Fully automatic, continous operation

Cooperate with PLC automatic control system for program setting to realize 24-hour continuous unmanned operation. From pumping out sludge, injecting chemicals and removing sludge, the continuous automatic operation of sludge dewatering is truly realized.

* Save cost and investment

Adopt integrated design, compact structure and savefloor space; Low spiral extrusion technology saves powerconsumption;Dynamic and static rings are designed toautomatically clean sludge and save water consumption;Save labor cost; With sludge thickening function, there isno need for thickening and storage unit,reducing floorspace and construction cost.

Users can reasonably select the working parameters of the equipment according to the physical properties of the separated material (suspension), separation requirements, treatment capacity, process requirements and other factors, so as to obtain satisfactory separation effect and economic benefits. Colors and materials can be customized.

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