I am participating in a competition to identify viable new markets for approximately 2,000 tonnes of recycled HDPE collected annually from used oil containers. These include:
19-litre pails (injection molded) – 23% of the total
1-litre and 5-litre jugs (blow molded) – 77% of the total
The...
@IRstuff Unfortunately, there was no measurable weight change before and after cleaning the flakes.I cleaned the flakes using two different methods:
Caustic Wash – A solution of 0.5 wt % NaOH and 0.3 wt % polysorbate 80 was heated to 75°C, and HDPE flakes (1/4 of the weight of distilled water)...
Thanks @pointsman I will give it a try. I have attached a picture of the flakes, they are large enough to support a droplet of water, but their surfaces vary. I was thinking of using a hammer to flatten them slightly before applying the water droplet and capturing the contact angle with my...
I am working on cleaning a small batch of HDPE flakes obtained from motor oil containers. My goal is to remove contaminants such as residual oil, and adhesives to evaluate the cleaning efficiency of the cleaning solution.The flakes I received from the processor were supposed to be pre-washed...
(7a and 7b) and (12a and 12b) are streams that undergo a phase change. I have broken Stream 7 into two dummy streams, one representing the stream as it is cooled to its dew point and the other representing the stream as it is further cooled to its desired temperature. Same goes to stream 12...
I looked into the issue of variability a bit more and found that organizations collect tax money from customers and use it to pay processors, incentivizing them to collect and mechanically recycle plastic. The processors working with these organizations don’t just handle oil containers, they...
https://patentimages.storage.googleapis.com/7d/e5/1a/c298c20150dd4a/EP3341462B1.pdf
I found a patent that claims >90% cleaning efficiency of contaminated. It involves contacting the contaminated plastic with a physical mixture of two liquid phases: water and an organic phase comprising of...
I am participating in a competition to identify new markets for recycling around 2000 tonnes HDPE oil containers colllected annually. About 80 % of these containers are blowded molded while the remaining are injeciton molded. They previously contained gear oil, hydraulic fluid, and engine oil...
I understand that in practice, crude methanol is first fed to a topping column to remove compounds lighter than methanol. The bottoms stream of the topping column is then pumped into the main refining column, where the methanol is purified to the required grade. However, the process flow diagram...
Thank you so much for your help and insights. I couldn’t have better understood the system without your guidance.
Yes, I definitely lack experience and knowledge of HVAC systems, as this is part of a university project for a course I’m taking. I understand that the warehouse is pressurized by...
I am attempting to account for the energy flows. Air is introduced into the warehouse via the makeup air unit, and there are no dedicated vents, so the air leaks out naturally. At the same time, cold air infiltrates through cracks in the building envelope.I am attempting to account for the...
I was able to gather that the unit heaters are always set for 7C with glycol continuosuly circulating through them. The unit heaters are controlled individually by their fans (ON/OFF/Auto mode). The make up air unit are usually always on. The door heaters are only on if the doors are opened in...
Thank you all for the helpful answers. I appreciate your guidance and I will reach out to the facility to gather the specifics you have highlighted. For the calculation of heat flux through construction barriers I will use
Q=A U ΔT
Where A is the area of the barrier (wall or roof)
U- barrier...
I am currently working on an energy management project focused on an industrial warehouse (pulp). I am trying to understand how the warehouse is heated to estimate the energy used and suggest energy saving measures. From what I understand so far, glycol is heated either by a separate boiler (its...
When bitumen is received by an upgrading facility, it is often accompanied by salt and water. In the desalter, bitumen is washed with fresh water, and a de-emulsifier is added to assist in phase separation. I have read that salt removal is challenging because salts are trapped within a bitumen...
