ECOMACCHINE S.p.A.Via Vandalino 6
10095 Grugliasco (TO)
Tel.: +39.0114028611
Fax: +39.0114028627
Email: ecomacchine@ecomacchine.it
Web: www.ecomacchine.it
SLUDGE DEWATERING
WITH BELT FILTER PRESSES
Type "200"
BELT FILTER PRESSES DESCRIPTION
Belt filter presses type «200» main characteristic is their simple and linear structure aimed to guarantee the highest reliability and operation expensiveness.
Our belt filter presses can be used to dewater any type of water suspensions: municipal and industrial sludges, as well as sludges coming from production processes (e.g. chemical, food industries and so on).
Belt filter presses type «200» are available in different models, according to the characteristics and quantity of sludge to be dewatered.
The main features of the different models are:
Quantity of pressing rollers:
5 7 9 11
Filtering belts width:
1000 1500 2000 2500 3000
Accessories on board of the machine:
Predewatering Drum
Mixer for Small Flowrates
Mixer for Big Flowrates
Mixer for Heavy Sludges
-
BEARING FRAME.
It consists of carbon steel very thick rectangular shaped pipes, strenghtened and welded to form a stiffened and perfectly levelled unit. The whole structure is protected by sand-blasting type Sa 2.5, then by a zinc-aluminium alloy hot spraying and finally covered by a layer of bicomponent polyurethanic resin. Bolts and nuts are made of SST A2 AISI 304. -
ROLLERS
They are equipped with a stiff structure with hot-driven pins and flanges. They are sized for a linear tension of 8 kg/cm. The pressing, tensioning, transmission and trajectory correction rollers are coated by 8 mm. of rectified rubber layer. The pre-compression rollers are made of Rilsan covered mild steel. -
BEARINGS.
All the rollers are supported by ball bearings (hot-driven) which are suitably sized to guarantee a life of at least 75.000 hours. -
FILTERING BELTS
They are made of polyester, continuous loop woven type or, at the customer’s choice, with SST clipper seam protected by epoxy resins. -
BELTS TRACTION SYSTEM.
It consists of an epicyclic motor variator connected to the traction rollers by means of toothed crowns and chains protected by carters. -
BELTS SPEED VARIATION SYSTEM
Servocontrolled system to change the filter belts speed from the electric control panel. -
BELTS GUIDE SYSTEM
neumatic type with proportional action probes to keep the belts continuously centered and one upon the other. -
BELTS TENSIONING SYSTEM
It consists of pneumatic jacks with air springs which keep the belts tensioned. -
BELTS WASHING SYSTEM
It consists of spray header pipes equipped with nozzles which can be cleaned by a special device with brushes which can be operated from outside. The spray header pipes are protected by carters which avoid the aerosol effect and collect the belts washwater separately. The whole system is made of SST AISI 304 -
WATER COLLECTING PANS
They are completely made of carbon steel and equipped with suitable slopes and outlet pipes. -
CANTILEVERS.
The framework is equipped with suitable connections to place the “cantilevers” which are used for the continuous loop woven belts replacement. The “cantilevers” are supplied as optional. -
ELECTRIC AND PNEUMATIC PLANTS ON BOARD OF THE MACHINE
Placed in two separate waterproof casings: the electric plant is complete with terminal strisps for all the power cables and signals; the pneumatic plant is complete with reduction filters and manometers for the belts adjustment and the intervention of the trajectory correction devices. All the conduits for the electric cables and the air pipes are made of self-extinguishing PVC, according to the law. -
SAFETY AND ALARMS
The machine is equipped with push-buttons to give the alarm and the stop when the belts tend to move out of the rollers (a malfunction of the belts trajectories control system). As regards the safety, the machine is protected by grating panels and protecting structures (EEC regulations).
PROCESS AND OPERATION PRINCIPLES
Completely made of SST AISI 304, it is installed to mix the sludge and the polymer solution, as well as to remove the water from the suspension resulting from the drum cloth filtering action. On diluted sludge, the belt press throughput can increase up to 60%.
Completely made of carbon steel. It consists of a cylindrical tank and a stirrer capable to mix the sludge and the polymer solution completely. In this way, a suspension of flocs which can quickly release the water onto the filtering belt is obtained. It is suitable for small flowrates of sludge.
Contrary to the previous one, this model is assembled out of the machine and the stirrer is driven by a geared variator. It is suitable for big flowrates of sludge.
PROCESS AND OPERATION PRINCIPLES
The sludge, which has been previously thickened in the predewatering drum (or the motorized mixer), is conveyed in a suitable area placed between the tensioning roller of the lower belt and the beginning of the drainage by gravity zone. This area has the fuction to distribute the sludge uniformely onto the belt whole width. To this purpose, at its outlet, it is equipped with a blade which can be adjusted in height and inclination. This blade levels the sludge carried ahead by the belt, which, being pressed, is uniformely distributed and starts draining by gravity.
After the drainage by gravity, the sludge passes through a wedge zone where the pressure on the sludge layer increases slightly because of a serie of seven idler and adjustable rollers placed both above and below the belts. This is useful to drain a fair quantity of water before the sludge reaches the proper pressing zone.
The sludge is now gradually pressed while going forward and winding around rollers with decreasing diameters. The main factors to obtain a high pressing efficiency are:
- a good permeability of the belt which must be chosen according to the type of sludge to be treated;
- high and increasing pressure while the sludge goes forward and winds around the rollers.
At the end of the process, when the two filtering belts move apart and wind around the traction rollers, the sludge layer tends to detach by itself; anyway, the action is completed by two scraping doctor blades (one for each roller).
SAFETY AND ALARMS
Belt filter presses type “200”, manufactured in different models, are equipped with safety devices in accordance with the UE 89-392 regulations and following modifications 91-368, 93-44, 93-68.
CONTINUOUS LOOP WOVEN BELTS
The machine is designed to allow the assembly of continuous loop woven belts by means of the “CANTILEVERS” which can be easily assembled onto the Belt Filter Press frame. The continuous loop woven belts main feature is a longer life with respect to the clipper seam ones. This means a great save of time and costs in the machine maintenance.
MODELS
Belt Filter Presses type «200» are manufactured in 4 models:
Model with 5 pressing rollers
Model with 7 pressing rollers
Model with 7 pressing rollers
Model with 11 pressing rollers
COMBINATIONS
COMBINATIONS
COMBINATIONS
COMBINATIONS
BELT FILTER PRESSES
Type "400"
BELT FILTER PRESSES DESCRIPTION
Belt filter presses type “400” main characteristic is their inexpensiveness thanks to the project optimization aimed to use simple and reliable components. The small and medium sized sludge dewatering plants achieve the maximum satisfaction by using this type of machines. Belt filter presses type “400” are manufactured in different models to meet the sludge characteristics and quantity to be dewatered. The main characterists to distinguish the different models are:
Quantity of pressing rollers:
5 7 9 11
Filtering belts width:
800 1200 1600 2000 2500 3000
Accessories on board of the machine:
-Predewatering Drum
-Mixer for Small Flowrates
-Mixer for Big Flowrates
-
BEARING FRAME.
Made of two very thick carbon steel plates (on request, SST AISI 304), fixed to each other by means of profiles and welded to form a stiffen perfectly levelled unit. The whole structure is protected by sand-blasting type Sa 2.5, then by a zinc-aluminium alloy hot spraying and finally covered by a layer of bicomponent polyurethanic resin. Bolts and nuts are made of SST A2 AISI 304 -
ROLLERS
The pressing, tensioning, transmission and sludge discharge rollers are protected by hot metal spraying and painted with bicomponent polyurethanic emails. The motorized pressing roller and the trajectory correction one are coated by 8 mm. of rectified rubber layer (on request, all of them can be rubber covered). -
BEARINGS
All the rollers are supported by ball bearings type ‘Y’ which are suitably sized and guarantee a perfect impermeability. -
FILTERING BELTS.
The filter press is equipped with SST clipper seam belts, protected by epoxy resins. -
BELTS TRACTION SYSTEM
Models with belts width of 800÷2000 mm.:
• it consists of a worm motor variator with speed manual adjustment, directly keyed to the roller;
Models with belts width of 2500÷3000 mm.:
• it consists of an epicyclic motor variator connected to a traction roller by a toothed crown and chains protected by carters.
-
BELTS GUIDE SYSTE
Pneumatic type with proportional action probes to keep the belts continuously centered and one upon the other. -
BELTS TENSION SYSTEM
It consists of pneumatic jacks with air springs which keep the belts tensioned. -
BELTS WASHING SYSTEM
It consists of spray header pipes equipped with nozzles which can be cleaned by a special device with brushes which can be operated from outside. The header pipes are protected by carters which avoid the aerosol effect and collect the belts washwater separately. The whole system is made of SST AISI 304, apart from the protection carters which are made of carbon steel (on request, they can be made of SST AISI 304). -
WATER COLLECTING PANS
They are completely made of carbon steel and equipped with suitable slopes and outlet pipes. On request, they can be made of SST AISI 304. -
ELECTRIC AND PNEUMATIC PLANTS ON BOARD OF THE MACHINE
Electric plant in waterproof casing with terminal strips for all the power cables and signals. The machine is also equipped with a pneumatic plant complete with reduction filters and manometers to adjust the belts tension and the speed of the trajectory correction devices. All the conduits of the electric cables and the air pipes are made of self-extinguishing PVC, in accordance with the law. - SAFETY AND ALARMS
The machine is equipped with push-buttons and limit switches to give alarm and stop when the belts tend to move out of the rollers (a malfunction of the belts trajectories control system). As regards the safety, the machine is protected by grating panels and protecting structures wherever the operator runs the risk to hurt himself (EEC regulations) in case of a careless operation.
PROCESS AND OPERATION PRINCIPLES
Completely made of SST AISI 304, it is installed to mix the sludge and the polymer solution, as well as to remove the water from the suspension resulting from the drum cloth filtering action. On diluted sludge, the belt press throughput can increase up to 60%.
Completely made of carbon steel. It consists of a cylindrical tank and a stirrer capable to mix the sludge and the polymer solution completely. In this way, a suspension of flocs which can quickly release the water onto the filtering belt is obtained. It is suitable for small flowrates of sludge.
Contrary to the previous one, this model is assembled out of the machine and the stirrer is driven by a geared variator. It is suitable for big flowrates of sludge.
PROCESS AND OPERATION PRINCIPLES
The sludge, which has been previously thickened in the predewatering drum (or the motorized mixer), is conveyed in a suitable area placed between the tensioning roller of the lower belt and the beginning of the drainage by gravity zone. This area has the fuction to distribute the sludge uniformely onto the belt whole width. To this purpose, at its outlet, it is equipped with a blade which can be adjusted in height and inclination. This blade levels the sludge carried ahead by the belt, which, being pressed, is uniformely distributed and starts draining by gravity.
After the drainage by gravity, the sludge passes through a wedge zone where the pressure on the sludge layer increases slightly because of a serie of seven idler and adjustable rollers placed both above and below the belts. This is useful to drain a fair quantity of water before the sludge reaches the proper pressing zone.
The sludge is now gradually pressed while going forward and winding around rollers with decreasing diameters. The main factors to obtain a high pressing efficiency are:
•a good permeability of the belt which must be chosen according to the type of sludge to be treated;
•high and increasing pressure while the sludge goes forward and winds around the rollers.
At the end of the process, when the two filtering belts move apart and wind around the traction rollers, the sludge layer tends to detach by itself; anyway, the action is completed by two scraping doctor blades (one for each roller).
Safety and alarms
Belt filter presses type “400”, manufactured in different models, are equipped with safety devices in accordance with the UE 89-392 regulations and following modifications 91-368, 93-44, 93-68.
MODELS
Belt filter presses type “400” are manufactured in 3 different models:
Model with 5 pressing rollers
Model with 7 pressing rollers
Model with 9 pressing rollers
COMBINATIONS
COMBINATIONS
COMBINATIONS
COMBINATIONS
COMBINATIONS
COMBINATIONS
POLYMER PREPARATION UNITS
Our Polymer Preparation Units are suitable to dissolve powder and liquid polyelectrolyte
The models included in the “P12B” series are semi-automatic while those included in the “P12C” series are completely automatic.
The models included in the “P612D” series have the polymer preparation tank completely separated from the ageing and storage tanks.
The preparation, ageing and storage tanks have a volume going from 1,000 up to 10,000 litres.
The volume of the hoppers goes from 70 up to 200 litres and they can be equipped with a heater to prevent water condensation.
The mixers are all slow-speed and 3-blade type.
All models are equipped with a flow-meter floating type.
The models included in the “P12C” series are equipped with alarm thresholds for “high” and “low” water flow.
All models are equipped with level sensors in the storage tank to protect the dosing pumps.
POLYMER PREPARATION UNIT
| Application | Polyelectrolyte dissolution in water. |
| Characteristics | The unit mainly consists of a hopper to contain the polyelectrolyte and one or more tanks for polymer preparation, ageing, storage. |
| Operation | Continuous or discontinuous. |
| Material | Stainless steel. |
| Optional |
System to dissolve the liquid polyelectrolyte. Polyelectrolyte powder pneumatic feeder. Heaters to prevent water condensation in the polyelectrolyte hopper. Ladder and platform. |
Technical data of the Automatic Polymer Preparation Units (for polyelectrolyte powder)
| Model | EM P12C3/3 | EM P17C3/3 | EM P20C3/3 | EM P25C3/3 | EM P30C/3/3 | EM P50C3/3 | EM P100C3/3 | |
| Hopper volume | :lt | 70 | 70 | 70 | 70 | 70 | 100 | 200 |
| Preparation, ageing and storage tanks volume | lt 1200 | 1700 | 2000 | 2500 | 3000 | 5000 | 10000 | |
| Dosing screw capacity | : gr/h | 500-5000 | 500-5000 | 500-5000 | 500-5000 | 750-7500 | 750-7500 | 800-12000 |
| Average continuous water flow rate | : m3/h | 0,2-1 | 0,2-1,5 | 0,2-2 | 0,2-2,5 | 0,2 - 3 | 0,5-5 | 0,5-10 |
| Preparation water pressure | : m.c.a. | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Dosing screw power | : kW | 0,22 | 0,22 | 0,22 | 0,22 | 0,22 | 0,22 | 0,22 |
| Mixers power | : kW | 3 x 0,37 | 3 x 0,37 | 3 x 0,37 | 3 x 0,37 | 3 x 0,37 | 3 x 0,75 | 3 x 0,75 |
Technical data of the Semiautomatic Polymer Preparation Units (for polyelectrolyte powder)
| Model | EM P12B1/1 | EM P20B1/1 | |
| Hopper volume | : lt | 70 | 70 |
| Preparation, ageing and storage tanks volume | : lt | 1200 | 2000 |
| Dosing screw capacity | : gr/h | 500-5000 | 500-5000 |
| Water | |||
| Average continuous water flow rate | : m3/h | 0,2-1 | 0,2-1,5 |
| Preparation water pressure | : m.c.a. | 20 | 20 |
| Dosing screw power | : kW | 0,22 | 0,22 |
| Mixers power | : kW | 1 x 0,75 | 1x 0,75 |
Technical data of the Automatic Polymer Preparation Units (for polyelectrolyte powder)
With overlapped tanks
| Model | EM P612D2 | EM P822D2 | EM 1841D2-3 | |
| Hopper volume | : lt | 70 | 70 | 2x 70 |
| Preparation tanks volume | 650 | 850 | 2 x 900 | |
| Ageing and storage tanks volume | : lt | 1250 | 2000 | 4100 |
| Dosing screw capacity | : gr/h | 500-5000 | 500-5000 | 5000-24000 |
| Average continuous water flow rate | : m3/h | 0,2-1,5 | 0,2- 2 | 0,2-3 |
| Preparation water pressure | : m.c.a. | 20 | 20 | 20 |
| Dosing screw power | : kW | 0,22 | 0,22 | 2x 0,22 |
| Mixers power | : kW | 1 x 0,37 | 1x 0,75 | 2x 0,37 1x1,1 |