Introduction

YUSHUN are always focusing on independent technology innovation of themselves. Under the cooperation with famous Universities, YUSHUN have successfully developed the new generation of sludge dewatering technology -Yushun® multi-plate screw press, a screw type sludge dehydrator that is much more advanced in very aspects than belt presses, centrifuges, plate-and-frame filter presses, etc. It features clogging-free, wide range of applications, low energy consumption, simple operation & maintenance.

It has solved several technical problems of other similar sludge dewatering equipment including belt presses, centrifuge machines, plate-and-frame filter press have,  which are frequent clogging, low concentration sludge / oil sludge treatment failure, high energy consumption and complicated operation etc.

Factors including concurrent water-power, thin layer dewatering, proper pressure and dewatering path extension etc. were applied by the dewatering mechanism of Yushun ®  multi-plate screw press. Lower energy / water consumption and longer service life can realized without changing the properties of the feed materials and with high efficiency.

Applications

Petro chemical processing

Light industry

Chemical fiber

Paper-making

Pharmacy and leather

Agricultural breeding

Etc

Working Principle

Thickening:

When the shaft is driven by the screw, moving rings around the shaft move up and down relatively. Most water is pressed out from the thickening zone and fall  down to the filtrate tank for gravity.

Dewatering:

The thickened sludge moves forward continuously from the thickening zone towards the dewatering zone. With the  pitch of the screw shaft thread getting narrower and narrower, the pressure in the filter chamber increases higher and higher. In addition to the pressure generated by the back-pressure plate, the sludge is greatly pressed and dryer sludge cakes produce.

Self-cleaning:

The moving rings rotates continuously up and down under the pushing of the running screw shaft while the gaps between the fixed rings and moving rings are cleaned to prevent from clogging that happens frequently for traditional dewatering equipment.  

Product Advantage

Direct Dewatering from Oxidation Ditch In the past times, sludge was commonly thickened before dewatering, but when the dewatering press was introduced to the world, it's a cutting-edge technology, it is consisted of a filtering drum with both thickening and dewatering zone, changed this notion.

Due to the unique structure, YUSHUN dewatering press can handle low concentrated sludge at 0.2% directly without any pre-thickening stage and is used in a great number of small-scale sewage treatment plants in China for dewatering sludge directly.

Advantages of Direct Dewatering from Oxidation Ditch Reduction of investment costs for thickening and storage equipment Reduction of running cost Removing odor by dewatering fresh aerobic sludge Reduction of the load of Phosphorus in the wastewater treatment

Product Feature

Due to the smart structure, advanced design and accurate manufacturing, Yushun® screw dewatering press has following features:

Special pre-concentrating device, wide feed solids concentration: 2000mg/L-50000mg/L

The dewatering part of press consists of a thickening zone and a dewatering zone. In addition, a special pre-concentrating device is mounted inner the flocculation tank. Therefore,  the wastewater with rather low solids content is not a problem to YUSHUN press. The applicable feed solids concentration can be as very wide from 2,000mg/L to 50,000mg/L.

Since press can be used directly to concentrate and dewater the low-solid sludge  from aeration tanks or secondary clarifiers, the users don't have to build a thickening tank or a storage tank any more while they have to when using other types of sludge dehydrators, especially the belt filter presses. Then significant civil engineering cost and floor area are saved. 

Furthermore, the phosphorus emission problem caused by aeration tanks or secondary clarifiers can be well prevented.

Fixed/moving rings replacing filter cloths, self-cleaning, clogging-free

As press using fixed rings and moving rings as filter media instead of filter cloths makes it especially good at treating oily sludge when compared with other types similar sludge dehydrator. The moving rings rotate up and down to the fixed rings when the gaps between them are cleaned to prevent from clogging.

Low-speed rotating, low noise, low energy consumption - only 1/10 of belt filter presses and 1/20 of centrifuges

Press doesn't need any big supporting equipment such as rollers to work with. The rotating speed is as low as only 2-4 r/min. As a result, it can realize water-saving, energy saving and low noise. The average energy consumption is only 0.01-0.1kwh/kg-DS, only 1/10 as that of belt filter presses and 1/20 as that of centrifugal machines .

Full-automatic control, simple operation and management

The structure of YUSHUN press is very compact. The flocculation part, dewatering part and the control cabinet are mounted very tight. All the processes can be operated automatically via the control cabinet.