Mechanical Dewatering Equipment

• Metallurgy (slurries of non-ferrous metal ore concentrates, iron ore concentrates, wet-cleaning oven gases, neutralized wastewater of etching stretches, galvanic effluent)
• Food industry (first saturation sugar juice, melt liquor of raw cane sugar, sunflower oil, ?, wine, juice)
• Chemical industry (titanium dioxide slurry, zeolite slurry, catalyst production slurries, silica white slurry, liquid glass)
• Cement industry (sludge from wet method cement production)
• Kaolin, ceramics, porcelain production (clay and kaolin slurries)
• Coal industry (sludge flotation)
• Industrial wastewaters (industrial rainwater, clarifier purging water on power plants, wastewater after regenerative air heater purging, wet ash removal, flushing wastewater, graphite containing slurries)
• Municipal wastewater

Operating Principle

The operation cycle with the filter plates clamping. The inner voids of plates are joined in the combined chamber space. When reaching a certain pressure value (which ensures the chamber space seal), the external pump feeds slurry into the filter press. This slurry gradually fills the filter press and due to the feed pump pressure , the liquid phase passes through the filter cloth and flows out of the filter press via the internal canal system. The cloth collects a layer of cake, with the thickness depending on the quality of the slurry supplied. This process takes place until the void is completely filled with the cake after which the slurry feed stops.

After filtering the cake in the chamber, it can be further processed to obtain additional effects with washing and drying. During washing the washing fluid is fed into the filter press. This expels the main filtrate from the cake. Washing can be done in several stages along with separation of the wash filtrate by concentration and discharging of the weakest portions for the first stages of the next cycle. Also, washing can be performed with several fluids. Washing is achieved by supplying washing liquids into discharge line from one side of the filter press. This provides conditions for uniform washing of the whole cake area. Washing is very effective in applications that require the maximum phase separation. Multilevel washing achieves good results with the lowest cost in washing fluid.

During the drying process, compressed air passes through the cake in the press, to decrease the cake humidity. As with the washing liquid, air is supplied into the filtrate discharging line from one side of the filter press to ensure uniform drying. Drying is done to reduce the moisture content in the cake for reduction of subsequent heat treatment costs, ensuring the transportation conditions of dried cake or to achieve maximum phase separation in cases when cake washing is impossible.

After filtering and processing, washed and dried cake is discharged from the filter press – the clamping plate is moved to the end position, followed by gaps appearing between the filter plates with the width greater than the cake thickness. Pressed by their own weight, cake fall out through the openings into the receiving bunker or on the removal device.

Automation

Eurotek filter presses are equipped with a variety of control and measurement instrumentation and a control system with an industrial controller. When the press is in operation, the control system manages the mechanical movements of different components, process operations and other processes related to them.

The automation level of Eurotek filter press is selected depending on the filter press type and size, its purpose, operating frequenc. It can be changed from completely mechanical to fully automated systems.

Variants

• Plate pack – chamber type, mixed, completely membranous.
• Plate suspension – overhead, side-bar
• Plate clamping – hydraulic, electro-mechanical, mechanical
• Plate separation – by sections, one by one, manually
• Pipe material – stainless steel, molybdenum steel, polypropylene, titanium
• Regeneration – portable high-pressure wash, automatic unit, chemical
• Valves – with pneumatic drive, with electric drive, manual
• Valve system – for all operations

Belt filter press 

• It is intended for mechanical dewatering of wastewater sludge, water conditioning sludge, and industrial slimes. 
• It features a rollers system installed on the frame, between which two endless belts are stretched and connected into continuous ducts.
• Two belt flushing assemblies, sludge feeder and distributor, and filter cake removal devices are provided with the filter press.
• Belt thickener 
• It is intended for mechanical dewatering, conditioning, and purifying wastewater sludge and industrial slime. 
• It features a strained, endless sieve belt with an installed ripper system.
• After dewatering in belt thickener, the sludge moisture can be reduced from 98-99% to 90-96%
• It is optimal for wastewater with pH 6.0 – 9.0.
• Belt filter press combi units
• In this system, the belt thickener is installed onto the frame of the belt filter press. 
• It features the belt filter press PL series and belt thickener SG mounted on it.
• The dewatered sludge in the belt filter press is treated with a polymer; however, in belt filter press combi units, after polymer treatment, sludge is fed into the top of the unit, on belt thickener.
• Here, preliminary sludge dewatering is done under gravity.
• Finally, the sludge is supplied to filter press gravity dewatering zone.
• The dewatering capacity can be increased with the belt filter press combi units.

Advantages

• Compact equipment.
• Best suitable for sludge with initial moisture of more than 97.5%.
• It lengthens the gravity dewatering zone.
• Low polymer consumption.
• High corrosion resistance.
• Cost-efficient.
• It is reliable because of the high-quality components in the equipment.
• High efficiency of sludge thickening due to a special system of rippers.
• Automated control system
• Certified spare parts and accessories

Operating Principle

The thickener operates in continuous mode.

• The sludge / flocculent mixture is fed to the moving top sieve belt and distributed all over its operating length. In the movement, the sludge layer is constantly mixed by the ripper system for water outflow improvement. The water drains via gravity feed. The dewatered filter cake is then removed from the belt by polymeric scrapers into the receiving bin. The thickener is flushed by water under pressure in the flushing zone after the filter cake removal.
• After dewatering in the thickener, the sludge moisture can be reduced from 98-99% to 90-96% – i.e. decrease of sludge volume of 3-10 times occurs.

Advantages

• High efficiency of sludge thickening due to special system of rippers
• High corrosion prevention – the case of is manufactured from stainless steel AISI 304 and the load bearing shafts of carbon structural steel that is protected by polymeric covering
• Automated control system of the belt and its protection against displacement

Automation

• The filter presses are provided with drives, belt position-, speed- and tension control system sensors and an air pressure loss protection system. It allows complete automation of the dewatering units on the basis of filter presses to implement.
• All electric sensors and drives have a high level of protection against moisture and ambient air corrosive action.
• An indication system of normal operation and emergency situations is provided.
• It is possible to transfer equipment status data to a higher level automated process control system depending on the client’s requirements.

Package

• Ready-fitted product
• Spare parts and accessories
• Certificate and operation manual
• Control cabinet
• Accessory equipment certificates and operation manuals
• Control cabinet operation manual