Introduction
The NJL-Type Vertical Fine Screen is a highlyreliable,stablyoperating,andhigh-performance sewage treatment andfiltration equipment. It is widely used inmunicipal sewage treatment, water supplytreatment,variousindustrialsewagetreatments, as well as other solid-liquidseparation fields.
During operation,the equipment cancontinuously and automatically remove solidsuspended solids from wastewater. It notonly cleans floating screen residues such aswood chips, branches, and plastic productsin water but also effectively removessuspended solids like hair, fibers, andflocculent soft substances from wastewater.Thus, it is an ideal and efficient pretreatmentequipment for water supply and drainagesystems, and has been widely applied infields including sewage treatment, reclaimedwater treatment, industrial wastewatertreatment, water intake of water supplyplants, and industrial water intake of powerplants.
Model Descriptoon
NXG 1000: "NJL" stands for Vertical Fine Screen, and "1000" refers to the width of the screen mesh plate (unit:mm).
Product Features
Large water-passing area of the mesh plate and high garbage interception rate.
Vertical installation, effectively saving space.
Stable operation, and no easy overload during mesh plate liftingEliminates problems such as fiber and hair entanglement.
Adopts an auxiliary discharge system composed of a rotating brush and a flushing mechanism forcleaner garbage removal.
The filter mesh plate has low friction, is wear-resistant, not easy to be blocked, and easy to clean.
Full automatic control can be realized through time and liquid level difference.
Working Principle
The vertical bar screen is installed at the water intake of various water plants to intercept floating objects,aquatic organisms, and other substances that fail to be intercepted by the coarse screen. Through thetraction chain, the rollers and screen frames fixed on the chain links roll along the track. Floating objectsin the sewage passing through the screen are retained on the inclined screen surface; as the screenrotates, the retained substances are moved to the operating platform. Then, the flushing device sprayshigh-pressure water through a set of nozzles, flushing the retained substances on the screen into thegarbage hopper, which are finally discharged through the garbage chute.
Main structure
The vertical bar screen is mainly composed of a main machine frame, filter plates, an internal screenresidue collection tank, a drive device and protective cover, a screen machine cover, a screen residueflushing device, a medium/high pressure flushing water pump, a flushing device pipeline fiter, abackwash pipeline from the pump to the screen, connecting accessories and valves, a pressure gauge,double-sided guide plates, an overload protection device, and an on-site control cabinet.
Advantage
Sewage flows into the screen from the middle,passes through the filter plates, and flows outfrom both sides. The structure is compact,occupying less floor space.
The non-metallic mesh plates are made ofnon-toxic and harmless food-grade ultra-highmolecular polymer materials, which is at theleading level in China.
With a unique material formula, it has a smallwater-swelling coefficient.
It has a large treatment capacity, can adapt tofluctuations in incoming water level, and has smallhead loss.
High efficiency in intercepting residues, fibers, and other substances.
The non-metallic hexagonal conical mesh plate adopts advanced technology.
Insensitive to the filtration of gravel and grit.
Fully enclosed design with lightweight covers that are easy to disassemble.
No phenomenon of filter residue passing through to the rear of the screen.
The orifice plate is resistant to ultraviolet radiation, non-aging, and has a long service life.
Specifications
Specifications
| Parts | Material |
| Filter Plate | Polymer Material |
| Frame and Main Material | SUS 304 |
| Screening Collection Tank | SUS 304 |
| Seal | Neoprene/Nitrile Rubber |
| Enclosure Cover Plate | SUS 304 |
| Enclosure Cover Plate | SUS 304 |
| Flushing Water and Screening Chute | SUS 304 |
| Anchor Bolts | SUS 304 |
Control System
The screen is equipped with an electrical control box,which is of outdoo rtype with an enclosure protection rating of IP55.AlI mainelectrical components are of well-known brands.The vertical fine screen cleaner and its supporting screening machine are controlled in linkage: when starting up, the fine screen and the screening machine start simultaneously; after shutd own, the screening machine stops with a 5-minute delay. The control box is placed near screen.
And the cables connecting to the equipment are provided by our company as part of the package. All equipment linkage controls are implemented through the control box. The control system features on-site manual/on-siteautomatic/remote central contro operation modes, which can be switched via the "Manual/Auto/Remote"selector switch on the panel
On-site Manual: Operators can start/stop the equipment via the corresponding buttons on the on-sitecontrol cabinet.
On-site Automatic: When the equipment is in on-site automatic mode, the screen operatesperiodically according to the set continuous running time and the interval between running andstopping
Remote Central Control: When the equipment control system is in remote mode, the start/stop of theequipment is controlled remotely by the operator of the central control system through signals sentfrom the HMI (Human-Machine Interface) of the No.1 Sewage Plant's automatic control system.
