The screw lattice RUM-LAT-SC is designed for efficient separation and transportation of waste in separation systems and is especially preferred in some industries (such as textile, slaughterhouses, pulp and paper mill, etc.).
The principle of fine cleaning implemented by the lattice design is a highly efficient system that protects the subsequent technological equipment and improves the operation of the enterprise/plant by removing solid waste from the process.
A stream of water enters the channel to the lower open sieve of the lattice and passes through its holes/openings. Solid particles are trapped on the inner surface of the sieve creating an additional filter layer. Later, the sieve is cleaned with brushes installed around the perimeter of the screw and the garbage is transported up where it is unloaded at a convenient level in a container, bag, conveyor or in a special washing and sealing machine. Brushes are washed with spray nozzles with a strong water impact.
In the RUMLAT-SC.WP model lattice, near the discharge neck there is a washing and squeezing zone for garbage, which provides an additional reduction in moisture and dehydration of trapped solid particles.
The integrated flushing of the waste, which serves to further optimizing of the cleaning process, improves the ratio of carbon and nitrogen in the effluent and can significantly save money on waste disposal. When washing, soluble substances are separated from solid contaminants, as a result of which faeces are almost completely washed out and the weight of garbage is significantly reduced (by almost 50%).
The program controls the lattice operation in a timer cycle when the upstream reaches a predetermined level.
The screw lattice consists of the following main parts:
Parts and components of the unit are made of aisi304 stainless steel (or aisi304L, aisi316, aisi316L on request) processed by etching in an acid solution.
The screw lattice is usually installed in a narrow channel (RUMLAT-SC model) or in a duct (“cabinet design”) on a process pipe system (RUMLAT-SC.B model).
Depending on the composition of wastewater pollution and the required quality of treatment, the screw lattice can be equipped with a perforated or slotted sieve.
Thanks to the wide range of sieves with different gap widths/perforation diameters and drum diameters, the required grating capacity can be found.
| Model | Consumption Q, m3/h * |
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Slotted sieve | Perforated sieve |
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| 0.25 mm | 0.5 mm | 1 mm | 2 mm | 3 mm | 4 mm | 5 mm | 6 mm | |
| SC300 | 29 | 58 | 86 | 108 | 76 | 97 | 115 | 130 |
| SC400 | 54 | 90 | 126 | 252 | 198 | 234 | 270 | 306 |
| SC500 | 79.2 | 144 | 216 | 252 | 198 | 234 | 270 | 306 |
| SC600 | 144 | 234 | 342 | 396 | 324 | 378 | 414 | 468 |
* The indicated approximate values are valid on an unclogged sieve and conditionally clean water.
| Model | L | h | H | B |
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| min. | max. | max. | min. | max. | min. | max. | |
| SC300 | 2500 | 8000 | 450 | 1150 | 4300 | 320 | 400 |
| SC400 | 2500 | 8000 | 500 | 1150 | 4300 | 420 | 500 |
| SC500 | 3000 | 9000 | 600 | 1450 | 4800 | 520 | 600 |
| SC600 | 3500 | 9000 | 680 | 1670 | 4850 | 620 | 700 |
Consider the indicated size values as approximate. The equipment is manufactured according to individual technical specifications agreed with the customer.
