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Tuesday, November 8, 2011

Contamination Removal from Plastics Recycling Processes to Deliver High Grade Recyclate

Plastics recycling processes continue to struggle with contaminates in materials, which degrade performance and lower value of the materials. As more companies establish sustainability goals, the need for cleaner recycled material streams will increase.

The Challenge is to find a way to remove contaminates (specifically colorant and fillers) from recycled plastics during the recycling processing. This Challenge refers
specifically to Polyethylene terephthalate (PET) and how to remove the colorants and fillers to obtain a very high quality recycled polymer.

Typical fillers are materials like silica, CaCO3 and other mineral additives. Colorants are usually concentrates (dyes) in a solid polymer or liquid matrix that is compatible with Polyethylene terephthalate (PET)

Optical, infrared, float tank sorting and the like are known technologies and should not be the sole content of a submitted solution. They may be components of a solution, but not the entire submission. There should be something unique or novel in your solution.

Successful solutions will enable recyclers to capture more high quality material and prevent it from going to landfill. This in turn drives down costs for brand owners, and therefore consumers, and enables a significant step towards establishing closed-loop systems for materials. This solution could revolutionize the recycling industry.

Any proposed solution should address the following Technical Requirements:

Saturday, November 5, 2011

Circulating fluidized bed design,Part Six, fuel feeding system



Attached as Biomass circulating fluidized bed design.docx


4. Design a fuel feeding and air inlet system

Input value

Parameter
Value
The power output

The fuel elementary analysis (C,H,N,S etc..)

The amount of fuel mass kg/s



Calculate amount of air that

Circulating fluidized bed design, Part Five, Cyclone parameters



Cyclone dimensions

The Lapple model for Ne calculation is as follows:
Cyclone diameter (mm)

Cyclone gas exit diameter (mm)

Cyclone body cylindrical height (mm)

Cyclone total height (mm)

Cyclone solids exit diameter (mm)

Pressure dropm (kPa)

The Number of Effective Turns (Ne)


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Circulating fluidized bed design,Part Six, fuel feeding system