Rotary drum screening is a continuous and effective fine screen removing suspended solids. It is mainly applied in pre-treatment stage of sewage treatment plant or industrial screening. Under the specified screening condition, it can remove of suspended solids from screened sewage.
Working Principles
When the rotary drum screening runs, the sewage or other raw water will flow into the screening inlet tank via inlet pipe lifting by pump. Through eliminator(or water distribution pipe), the sewage will flow into the front of screw screen and pass through the screen surface and flow into the drum. Finally, the sewage will now out at the bottom of the drum. The suspended solids will be left on the drum surface. With the vibration of the drum surface, the suspended solids will be transported from one side to another side and will be discharged by the discharging mechanism.
Features
• This unit will adopt wedge-type as filtering parts, easy for fluid passing through, non-blocking.
• Use stainless steel grid which apply for high temperature and high concentration of screening.
• This unit will use drum type, large filtering space. Thus for the same treating capacity, it has advantage of compact structure, small footprint, low energy consumption.
• This unit will use backwnash nozzle to cleaning the debugging among drum screen. For the backwash start-up and stop-down, it can be controlled automatically or manual control.
• This unit can achieve continuous operation, automatic sludge discharge, high degree of automation.
• Completely closed design in case of secondary pollution.
• For the whole unit, it will be made up of stainless steel.
Technical Data Sheet
1. Flow Sheet
2. Technical Data Sheet
MECHANICAL BAR SCREENING
Introduction
Mechanical bar screening is an advanced solid-liquid separation unit. It is mainly applied for municipal, district WWTP pre-treatment stage, municipal rainwater and sewage pumping station, waterworks and cooling water from power plant. This unit has been widely applied in textile, printing and dyeing, food, aquatic product, paper-making, slaughter, tannery wastewater treatment process. It is an ideal unit for screening.
Structure & Working Principles
This unit adopts rotary type, several plow-shaped rake will be installed on the shaft, forming rake chains. According to the water flow volume, the bar screen will have different spaces or gaps installed on the front of the pump station or water treatment system. When the drive mechanism move from bottom to top with rake chains. The debris will be taken out from the rake chains, while the liquid will flow through screen gap. When the unit rotates into the top, the rake chain will revert its running direction, moving from top to bottom. The matters will fall off from the rake chains. When the rake rotates into the bottom from the opposite side. Then it will re-start for continuous running.
Features
• High degree of automation, high efficiency of separation, low energy consumption, no noise, outstanding corrosion resistance. Continuous and stable running with no one watching. Its has set up with mechanic over-load safe protection. When it occurs fault, cut off the shear pin in case of overloading working and damaging the accessories.
• We can adjust the running interval according to the clients’ requirement reaching periodic operation. We can have control the unit automatically according to the liquid level difference before and after the screen. Also, the manual control can help us for maintenance. We can select the control mode according to the client’s requirements.
• Because of its reliable design, it has strong self-cleaning ability during working and operation with no blocking phenomena. Thus there is little maintenance job during daily life.
Technical Data Sheet
Outside Drawing for Reference
STATIC SCREENING
Introduction
The main body of the static screening is made up of wedge-type stainless steel or screen face. The sewage will be
distributed on the screen face via overflow weir. Because of the smooth screen face with small gap, the static
screening can drain out water easily without blocking. Under the effect of hydraulic, the solid matters will be
pushed into the hopper (optional parts) for solid-liquid separation.
Features
• Make use of water flow gravity action, no energy consumption.
• Large treating capacity of one unit.
• NO blocking, easy for maintenance.
• The whole unit is made up of stainless steel, high mechanic strength.
Application
According to different kinds of sewage, static screen can remove suspended solids, float scum, etc. As the
primary treating process, static screen can replace of sedimentation tank reducing large numbers of job,
strengthening the biological treating process and saving running Static Screen can also be used for solid-liquid
separation and thickening.
Typical application Industry:
• Paper-making industry—recycling of fiber, removing solids.
• Tannery wastewater— removing of feather, oil and grease
• Slaughterhouse wastewater— removing of bag, fur, grease and feces.
• Municipal wastewater removing fur, debris.
• Alcohol plant, starch factory —removal of solid substances such as vegetable fibre, hulls, groceries,etc.
Justin
Justin
Justin