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Feasibility analysis report of Waste plastic pyrolysis oil project (part 2)

2. The characteristics of DY series:
   2.1    Component of the project

  •  Reactor
  •  Catalyst chamber
  •  Condenser system
  •  Feeding system
  •  Pressure and temperature alarm system
  •  Electronic control system
  •  Automatically slagging and safety system
  •  Environmental protection and tail gas recycling system
waste tyre pyrolysis plant
waste tyre pyrolysis plant

  2.2    Special design of several systems
  • Reactor
  In the domestic market, most of the vertical or horizontal reactors are uneven heating, easy broken, low yield, short life span and so on. The design of our reactor can overcome such drawbacks. It is 360-degree rotating which is 0.4r per minute. Besides, this kind of structure can be overall heat, larger heating area and higher speed of pyrolysis process.
  •  Slagging system
  The reactor produced from China is mainly a fixed structure. It is difficult to slag the carbon black, besides, the carbon black can not be slagged thoroughly. However, the slagging system of our special design reactor is automatically. High speed and slagging thoroughly.
  • Environmental protection system
  Smoke: Our dedusting system has a more complicated and scientific design than others in order to remove the dust and sulfur. Add Cao into the circulating water and use high-pressure hydraulic pump to press this water into high pressure nozzle(also can be called Spray Scrubber) which can first atomize the water, then reactor with SO2 while, at the same time, absorb the dust in the smoke. After the process of our dust removal system, the color of the smoke is white, which means our machine can reach the international purification standard and will not cause pollution on the environment. We have done the EPA and SGS test.
Carbon black: After the pyrolysis process of waste plastic, it will produce some waste residue which the weight is nearly 5-10% of the plastic. And the main component is carbon black which can be materials for producing industrial carbon black or mixed with coal ash to make flyash brick..
Waste water: In the whole pyrolysis processs, only condensers and cooling devices need circulating water to cool the system. The water sealing devices will produce little waste water, which can be processed in the flue heat system
  •   Exhaust system
  In the process of pyrolysis, some combustible gas can not be converted into oil liquid in normal temperature and pressure. If release this gas directly, that may cause air pollution problems. We have designed a kind of tail gas recycling burners that can solve this problems very well. The tail gas gets through the water sealing device that is a fire-prevent protection procedure, and then is leaded  into the furnace for heating the bottom of reactor again. This can protect the environment and save the energy fuel.
  •    Newest technology of pyrolysis
  Waste plastic usually takes the pyrolysis technology to do recycling usage.Pyrolysis technology is the industrial process of breaking down large molecules of plastic/tire into smaller molecules of oil,gas and carbon black.The pyrolysis technology of waste plastic not only no pollution to the environment but also recycle the energy effectively.That is to say,pyrolysis technology of plastic is the inverse process of manufacturing plastic products by crude oil materials.Our doing company add different catalyst to the different plastic materials for pyrolysis.Comparing with the domestic pyrolysis technology,we improve the oil yield and quality.

a>  Because the plastic is made of different raw material, the pyrolysis process is also a little different.PE,PP and PS are decomposed at 300-400 centigrade degrees.

But the PVC is decomposed at two stages which are  200-300 and 300-400 centigrade degrees.The PVC may release HCL and hydrocarbon,and then break down step by step.Due to the corrosivity of HCL,and it will effect the pyrolysis catalyst,life span and the oil quality.Then the pyrolysis technology requests  that the PVC should be less than 30% of the waste plastic.

b>  The molecules of different plastic is very different,so the final product and oil yield is different.Generally,there are four kinds of final pyrolysis products: hydrocarbon gas(C1-C5), oil (gasoline is C5-C11,diesel oil is C12-C20,the heavy oil is C20), paraffin and coke.
(Chart 1.).This is the oil yield of some typical  plastic.

PE 95%
PP 90%
PS 90%
ABS 40%
c>  The technical index of the pyrolysis oil (as shown in the chart 2)
(Chart 2)..

Item Unit Pyrolysis oil
Density g/cm3 0.9017
Flash point <40
Kinematic viscosity mPa.s 3.561
Gross calorific value Mj/kg 44.32

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