Sludge Dewatering System uses the principle of screw extrusion to concentrate and dehydrate sludge in Complete within one device.

The front section is the concentration section, and the back is the dehydration section. When the screw shaft rotates, multiple fixed and movable laminations on the periphery of the screw shaft move relative to each other. Under gravity, sewage is filtered out from the gaps between relatively moving stacks to achieve rapid concentration. 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, the gap between the rings also gradually decreases, and the volume of the spiral cavity continues to shrink; under the action of the outlet back pressure plate, the internal The pressure gradually builds.

Driven by the continuous operation of the screw transmission shaft, the water in the sludge is squeezed out. The solid content of the filter cake continues to increase, ultimately achieving continuous dehydration of sludge. At the same time, the rotation of the spiral shaft promotes the continuous rotation of the swimming ring.

The equipment relies on the movement between the fixed and moving rings to achieve a continuous self-cleaning process, cleverly avoiding the common clogging problem of traditional dehydration equipment. The snail stacking dehydrator mainly comprises a snail stacking body, a spiral shaft, a driving device, a filtrate tank, and a mixing system. It is also equipped with a set of dosing devices.

Sludge Dewatering System  working process（Video Description）

Screw press is composed of Screw body, Driving motor system, Inlet mixing system, Collection water tank, Back-washing system, etc.

When running, the sludge is lifted to the mixing tank through the sludge pump, and the dosing pump quantitatively transports chemicals to the mixing tank. The Agitator drives to mix the sludge and the chemical agent to generate alum.

When the liquid level reaches the upper position of the liquid level sensor, then it gets the signal which makes the screw press main motors work. After that, the screw press starts to press and filtrate the sludge water flowing into the screw body. Under the working of the spiral shaft, the sludge is lifted to the outlet step by step, with filtration water flowing out from the gap between fixed rings and moving rings.

Commonly used sludge dewatering equipment

Filtration and sedimentation methods are often used when dehydrating sludge and separating solid from liquid. As far as filtration is concerned, filtration refers to the effective separation of solids and liquids in a mixed liquid. This method uses media blocking to achieve solid-liquid separation in the mixed liquid.

As far as sedimentation is concerned, solid-liquid separation can also be achieved in mixed liquids. The principle is that the densities of solids and liquids are quite different. Gravity fields and other methods can cause directional movement of solids, thereby achieving solid-liquid separation.

As shown in the figure, sedimentation includes centrifugal sedimentation and gravity sedimentation, among which centrifugal sedimentation includes disc centrifuge, tube centrifuge, tilting bridge centrifuge, etc.;

Filtration includes screen type and pressure filter type. Screen type includes vibrating screen, spiral screen, etc.; pressure filter type includes belt machine, spiral filter press, etc. Plate and frame filter presses, belt filter presses, centrifugal dehydrators, and stacked screw dehydrators are currently commonly used mechanical sludge dehydration equipment at home and abroad.

Comparison of 4 types of mechanical dewatering equipment

Sludge Dewatering technology parameter table

Model	(kg-DS/h)	Spiral Diameter(mm)	Discharge Distance(mm)	Dimension(mm)			Net Weight(kg)	Operating Weight(kg)	Power(kw)
				L	W	H
DL131	4~14	￠ 130*1	340	2041	636	1006	240	330	0.4
DL132	8~28	￠ 130*2	302	2139	886	1006	330	480	0.6
DL201	8~20	￠ 200*1	432	2434	768	1307	400	650	0.57
DL202	16~40	￠ 200*2	433	2484	914	1307	560	760	0.94
DL203	24~60	￠ 200*3	433	2586	1244	1527	850	1050	1.51
DL251	12~25	￠ 250*1	474	2593	768	1569	450	700	0.57
DL253	24~75	￠ 250*3	433	2836	1244	1527	1370	1570	1.51
DL301	20~70	￠ 300*1	568	3138	969	1821	860	1250	0.95
DL301L	20~70	￠ 300*1	638	3324	710	1659	860	1250	1.5
DL302	40~140	￠ 300*2	523	3334	1162	1608	1300	1900	1.65
DL302L	40~140	￠ 300*2	555	3531	1100	1872	1400	2000	1.65
DL303	60~210	￠ 300*3	560	3477	1605	1821	1700	2600	2.2
DL304	90~280	￠ 300*4	504	3736	2030	1816	2050	2950	2.95
DL351	40~120	￠ 350*1	676	3819	1000	2179	1500	2480	1.65
DL352	80~240	￠ 350*2	657	3919	1375	2179	2950	4500	2.75
DL353	120~360	￠ 350*3	658	4120	1905	2181	4350	6750	4.05
DL401	67.5~160	￠ 400*1	676	3819	1000	2179	1950	2900	1.65
DL402	135~320	￠ 400*2	657	3919	1375	2179	3300	4900	2.75
DL402L	135~320	￠ 400*2	687	4787	1430	2456	3500	5100	3.55
DL403	135~320	￠ 400*3	658	4120	1905	2181	4350	6750	4.05
DL403L	200~480	￠ 400*3	686	5203	2040	2458	4550	6950	5.6
DL404	200~480	￠ 400*4	657	3919	2760	2179	5450	7650	5.5
DL404L	266~640	￠ 400*4	686	5806	2620	2458	4550	6950	7.5

Sludge Dewatering outline drawing

1. Moto	2. Flocculation mixer	3. Screw body	4. Electric control cabinet
5. Side cover	6. Base of flocculation mixing tank	7. Screw body base	8. Dry Sludge outlet
N-1. Sewage inlet	N-2. Filtration discharge	N-3. Feed water inlet	N-4. Chemical dosing inlet
N-5. Returning pipeline	N-6. Vent of mixing tank

Product Details

Dissolved air flotation product details

Effectiveness of equipment

Dissolved air flotation Effectiveness of equipment

Cooperation Case

Painting Process Wastewater Treatment Project

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