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Factory direct sale wastewater lamella clarifier equipment for wastewater treatment system

Lamella clarifier

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1. Introduction

A lamella clarifier or inclined plate settler (IPS) is a type of settler designed to remove particulates from liquids.

They are often employed in primary water treatment in place of conventional settling tanks. They are used in industrial water treatment. Unlike conventional clarifiers they use a series of inclined plates. These inclined plates provide a large effective settling area for a small footprint. The inlet stream is stilled upon entry into the clarifier. Solid particles begin to settle on the plates and begin to accumulate in collection hoppers at the bottom of the clarifier unit. The sludge is drawn off at the bottom of the hoppers and the clarified liquid exits the unit at the top over a weir.

The lamella clarifier also called inclined plate sediment tank. It is a kind of high efficient combined type settling tank; set many dense inclined tube packing in sediment area, to make the suspended impurity in water sediment, water rise flow along inclined tube, the separated sludge down to the tank bottom along the inclined tube by gravity, then discharge it in concentration. Such tank can improve sediment efficiency 50~60%, it can improve treatment capacity 3~5 times in the same area. It can design different flow rate inclined plate sediment device according to raw waste water test report, it need dose flocculant usually.

Inclined plate sediment water purifier is format by install 60° dip angle inclined tube above the sludge suspended layer, to make the suspended solids or floc alum flower by dosing flocculant accumulate into thin sludge later in inclined tube downside superficial area, slide back to sludge suspended layer rely on gravity, then settling in sludge collecting hopper, discharge into sludge tank by sludge pipe for separate treatment or comprehensive utilization. The supernatant fluid gradually rise to water collecting pipe discharge or reuse.

Working Principle

1) Inclined tube material: PVC, PE, PP ,inclined plate: carbon steel lining 
2) Inclined tube cross section is regular hexagon, inclined plate cross section can be parallel-plate.
3) The cleaning water area height is 1.0-1.5m above the inclined pipe top, the water distribution zone below the bottom no less than 1.0-1.5m, mechanical discharge sludge, the water distribution zone height should more than 1.6m, convenient install and maintenance.
4) The Re number in water flow less than 500,Fr number is 10-3—10-5 in inclined pipe.
5) Inclined tube design flow rate is 1.0-4.0mm/s, inclined plate 10-20mm/s. 

Main feature

1) Simple structure, without wearing parts, wear well, decrease maintenance

2) Steady operation, easy operation

3) Small power, save energy

4) Small occupy area, low investment, high efficient

5) Short retention time, high sediment efficiency, no sludge backflow.

Product Application

Lamella clarifiers can be used in a range of industries including mining and metal finishing, as well as used to treat groundwater, industrial process water and backwash from sand filters. Lamella clarifiers are ideal for applications where the solids loading is variable and solids sizing is fine and are more common than conventional clarifiers at many industrial sites due to their smaller footprint.

One specific application is as pre-treatment stage for effluent entering membrane filters. Lamella clarifiers are considered to be one of the best options for pre-treatment ahead of membrane filters. Their all steel design means there is a low chance that part of the inclined plate will chip off and be carried over into membrane, especially when compared to tube settlers which are constructed of plastic. Further lamella clarifiers are able to maintain the required water quality to the membrane without the use of chemicals. This is a cost saving measure both in purchasing chemicals and limiting damage to the membrane, as membranes do not work well with the large particles contained in flocculants and coagulants.

Lamella clarifiers are also used in the municipal wastewater treatment processes. The most common wastewater application for lamella clarifiers is as part of the tertiary treatment stage. Lamella clarifiers can be integrated into the treatment process or stand-alone units can be used to increase the flow through existing water treatment plants. One option for integrating lamella clarifiers into existing plants is for conventional or sludge blanket clarifiers to be upgraded by attaching a bundle of inclined plates or tubes before the overflow in the so-called "clear water zone". This can increase the settling area by two-fold resulting in a decrease in the solids loading in the overflow.

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Advantage

The main advantage of lamella clarifiers over other clarifying systems is the large effective settling area caused by the use of inclined plates, which improves the operating conditions of the clarifiers in a number of ways. The unit is more compact usually requiring only 65-80% of the area of clarifiers operating without inclined plates. Therefore, where site footprint constraints are of concern a lamella clarifier system is preferred.

The reduced required area allows the possibility for the clarifiers to be located and operated inside, reducing some of the common problems of algae growth, clogging due to blowing debris accumulation and odour control, that occur when the machinery is outdoors.

Operation within an enclosed space also allows for a better control of operating temperature and pressure conditions. The inclined plates mean the clarifier can operate with overflow rates 2 to 4 times that of traditional clarifiers which allow a greater influent flow rate and thus a more time efficient clarification process.

Lamella clarifiers also offer a simple design without requiring the use of chemicals. They are therefore able to act as pre-treatment for delicate membrane processes. Where necessary flocculants may be added to promote efficiency.

Lamella clarifier performance can be improved by the addition of flocculants and coagulants. These chemicals optimize the settling process and cause a higher purity of overflow water by ensuring all smaller solids are settled into the sludge underflow.

A further advantage of the lamella clarifier is its distinct absence of mechanical, moving parts. The system therefore requires no energy input except for the influent pump and has a much lower propensity for mechanical failure than other clarifiers. This advantage extends to safety considerations when operating the plant. The absence of mechanical parts results in a safer working environment, with less possibility for injury.

Company Profile

Qingdao Yimei environment project Ltd. Found in 1988, located in maxi Chinese military affairs harbour base Jiao Nan City. Occupy about 36,000 square meters, 15,000 square meters workshop building, have each kind of processing machine about 130 pcs, as one of Shandong Province environment protection industrial association trustee member unit, now have staff about 300 person, 72 engineers and technicians, mainly engaged in the environment project, environmental protection equipment design and manufacture, water treatment technological development, engineering construction, technical service and series of products of client customized.

    We have the well experienced engineer, strong specialized production base, advanced manufacturing facilities, and can supply the first-rate product and special field consulting service.

In the long rang concentrates efforts on environment protection cause investing in construction, complete sets of equipment and project overall contracting.

Our Service

1.     Professional design for you 
According to the actual needs of professionals will be free to design targeted programs and products to ensure efficient complete solution actual demand.

2.     Strict product examination
Professional advanced processing equipment and skilled workers, to build an advanced DAF equipment.

3.     Professional after sale service
For equipment installation, specialized personnel will provide overseas equipment installation guide, commissioning, operation, maintenance instructions.

4.     Technical support
In the process of use, if you encounter any problems, we will always provide technical support for you.