$4998-28000 /Piece/Pieces
| Payment Type: | L/C,D/P,D/A,T/T,Others |
| Incoterm: | FOB,CFR,CIF,EXW,FAS,CPT,FCA,CIP,DEQ,DDP,DDU,Express Delivery,DAF,DES |
| Min. Order: | 1 Piece/Pieces |
| Transportation: | Ocean,Land,Air |
| Port: | shanghai,qingdao,shenzhen |
Model No.: FYY-DAF5-300
Brand: Feiyiya
Status: Used
Applicable Industry: Hotels, Farms, Food &Amp; Beverage Shops, Restaurant, Garment Shops, Building Material Shops, Other, Advertising Company, Retail, Food Shop, Manufacturing Plant, Printing Shops, Food &Amp; Beverage Factory, Energy &Amp; Mining, Construction Works, Machinery Repair Shops
Out-of-warranty Service: Video Technical Support
Where To Provide Local Services (in Which Countries Are There Overseas Service Outlets): Sri Lanka, Australia, Romania, Kenya, Turkey, Bangladesh, India, South Korea, Kyrgyzstan, Germany, Spain, Algeria
Showroom Location (in Which Countries Are There Sample Rooms Overseas): Saudi Arabia, Argentina, Malaysia, Morocco, Kenya, Chile, United Kingdom, Italy, Colombia, Algeria, Viet Nam, Thailand, Japan
Video Factory Inspection: Provided, Provided
Mechanical Test Report: Provided
Marketing Type: New Product 2020
Core Component Warranty Period: 3 Years
Core Components: Gearbox, Pump, Gear, Bearing, According to your order
Place Of Origin: China
Warranty Period: 1 Year
Productivity: 50000l/Hour
Status: New
Applicable Industries: Petrochemical,Biological fermentation,Food,Electronic,Chemical fiber,Breeding,Pulp and Paper,Slaughter,Municipal industry,Power plants,Kitchen waste treatment
Type Of Marketing: New Product 2020
Warranty Period For Core Components: 1Year
Product Name: Efficient air flotation
OEM: Yes!welcome
Quality: High quality
Custom Service: Logo,packing,printing custom accepted
| Selling Units | : | Piece/Pieces |
| Package Type | : | wooden box |
| Picture Example | : |
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Why should I buy a DAF
Learn the top 10 reason to buy a DAF to solve or improve your wastewater treatment.
Process described
The feed water to the DAF float tank is often(but not always)dosed with a coagulant(such as ferric chloride or aluminum sulfate)to flocculate the suspended matter.
A portion of the clarified effluent water,approximately 25%,leaving the DAF tank is pumped into a saturation tank along with either atmospheric air or compressed air.The saturation tank,then separates large air bubble from small air bubbles,enabling the just the small bubble to be recycled back and mixed with the influent wastewater.The bubbles adhere to the suspended matter,causing the suspended matter to float to the surface and form a layer of Sludge which is then removed by a skimmer.The sludge-free water exits the float tank into a clear-well compartment as the clarified effluent from the DAF unit and then out to the next process or discharged.
Systems Series DAF Design
A typical DAF unit process flow is displayed above
Specifications for the Series dissolved air flotation System
The Series Dissolved Air Flotation(DAF)system includes influent,effluent,and drain connections,floatation tank,contact chamber,float removal system,settled solids return system,lamella tubes,complete recirculation system including whitewater pump,saturation tank followed by a secondary weir for finer bubble separation of large bubbles from small bubbles and local PLC based control panel.As more specifically outlined below:
a)Influent Wastewater:Influent is induced with chemistry in order to precipitate suspended solids,fat oil&grease and other impurities from the water prior to the physical separation with dissolved Air Flotation.The DAF shall incorporate one of the following methodologies to inject and mix chemicals:
Flocculation Tubes:The DAF shall incorporate flocculation tubes with injection ports for coagulants,pH adjustment and polymers,along with static mixers.The wastewater shall enter the flocculation tubes through a flanged connector and exit into the contact tank through another flanged connector at the header.
Chemical
Reaction Tanks:For greater control over the precipitation of impurities,chemical reaction tanks are recommended.The reaction tanks shall have mounted mixers with VFDs(Variable Frequency Drives)and means to accept chemistry from various chemical feed pumps into the tanks.The reaction tanks shall be placed prior to the DAF.The influent wastewater shall first pass through the reaction tanks and then exit into the contact chamber through a flange connector at the header.
b)Contact Chamber:The influent wastewater shall enter the DAF unit through a flanged influent header into the contact chamber.Simultaneously,the recycle(whitewater)stream shall be mixed with the influent wastewater through a tangential pipe that is connected into the header,creating vortex.The vortex effect results in 100%contact between the air bubbles in the whitewater and the dirty influent water.As the water enters into the contact chamber it shall first encounter an internal weir acting as a secondary coarse bubble separator which provides even distribution and mixing of the process flow across the width of the unit,without any turbulence.The contact chamber has a drain port for removal of heavy solids that may settle in the chamber.
c)Flotation Tank: The unit consists of a rectangular flotation tank constructed of 304stainless steel plate reinforced with 304stainless steel tubular vertical wall structural supports.
The vessel shall be supported on a stainless steel base consisting of vertical and horizontal beams across the width and length of the unit.
The vessel shall be constructed to allow for easy cleaning around and under the unit.The unit shall be designed for above-ground positioning on a suitable concrete pad or steel frame and shall be constructed for indoor or outdoor conditions.
d)Lamella Tubes in Flotation Chamber: To increase efficiency and maintain smaller footprint,the Flotation Chamber shall be filled with Lamella Tubes,whose function is to increase the projected surface area and improve the separation efficiency of the solids from the clear water.The Lamella Tubes shall be made of Polypropylene material with 60°angular slant toward the co-current water flow.The lamella tubes shall have chevron shape to prevent clogging and 2”spacing between each lamella.
e)Float Removal System:The unit shall be equipped with a chain and flight skimmers to remove top floats,driven by a low speed VFD(Variable Frequency Drive),gear reducer with motor assembly.The float material shall be removed in a co-current direction.This design involves moving the float bed on the surface down the length of the unit to a separate compartment in the direction of flow and allows for longer float residence time prior to removal,resulting in drier float material.
The top skimmer system consists of non-metallic glass reinforced nylon chain with a maximum recommended working load of 1740lbs.,or average ultimate strength of 2800lbs.in a double pitch roller chain.The skimmer blades are spaced approximately every 6ft.along the chain length.The chain system operates on single duty,non-metallic UHMW sprockets mounted on stainless steel shafts turning in adjustable bearing supports.The system is driven by a gear drive with TEFC coupled to the keyed drive shaft.Drive speed shall be controlled by a VFD(in the control panel)which shall be equipped with a shaft power monitor to protect the equipment in case of overload.Adjustable timer controls or PLC controls(in optional control panel)provide for intermittent skimmer operation which allows for flexibility in the removal of float material from the unit.
On the effluent end,the skimmer pulls the collected surface material(float)up an inclined beach plate and into an internal float hopper.The beach is sloped to allow for efficient removal of float material by the skimmer wiper.The internal float hopper is sized to allow intermediate storage of the material prior to discharge through a flanged pipe for pumping to storage for dewatering or transport.
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