Pyrolytic Fuel Oils - Fourth Stage Condensation of fuel gases - Fourth Stage I explained in the third stage, that pyrolysis reaction produces gases, this gases are condensables or non-condensables. All gases go through a cooling system or multi-stages condentation system, these gases when leave the reactor are hot, but in this stage start to cool, this action permit that condensables gases become to liquids fuels. By the other hand, the condentation system has at the end of the process non-condensables gases reservoir tanks, this tanks permit us: 1)Accumulate non condensables gases, 2) To stabilize pressure in all system, 3) Cooling gases before to burned at the reactor-burner gases feedback. 4)To clean a little bit non-condensables gases. We get three fuel oils grades according its API degrees, but this grades of pyrolytic fuel oils are very close, so we send to a mix and homogenization tank, there we make; a) moisture control and b) density homogenization.

Pyrolysis Reaction - The third stage Once the reactor is to fill with five thousand of kilogram of old tires, operators start to close the reactor, (that mean close the gate). How is the reactor? Reactor is a close tank, its has a cylindrical form and its capacity is twenty cubic meters, the fabrication material of the reactor is carbon steel, the thickness of its wall is approximately twenty millimeters, this reactor is in horizontal position and it is on four wheel bearing that permit than reactor rotate. In one size of the reactor, it has a main gate its size is one meter twenty five centimeters of diameter, this gate permit us: go inside to check reactor structure, load the reactor, unload one of the final product. The reactor also has a small gate at lateral place of the tank, for this gate permit check if we can unload the pyrolytic carbon black that is obtain. Once close the reactor, we are ready to start the pyrolysis reaction, Pyrolysis reaction is literally "the heart of the process" about this reaction we can say, it has three phases, 1st Heating, In this phase, we produce heat from natural gas with this heat permit us to get the reaction temperature from environmental temperature to thermal degradation temperature, at this moment pyrolysis gases start to produce, so we change our combustible source, that mean we stop to burn natural gas and begin to burn pyrolytic gas that is produce by the same reaction. 2nd Pyrolysis Reaction, This phase is the more important and during this phase all persons around the reactor have to be warning, because is the more dangerous risk phase could be occur a explosion if pressure in the reaction system grow quickly, but there are enough security control to carry out this procedure by security, This phase end when all pyrolytic gas is burn and temperature start to down. Finally, 3rd. Cooling Phase, when Pyrolysis reaction is over, chemically occur that reaction need more energy, so if there is not more heating source the system reaction start to down its temperature quickly. However, It is necessary wait at least 8 to 10 hours to unload the reactor. Note: Picture loading old tires to reactor

Second operational stage. Cutting old tires. The second stage in the pyrolysis process is to cut tires. Why Is necessary cut tires? Because, a tire is a very voluminous object, about 70 % of its volume is air and this air is a non-desire condition inside the reactor. I try to explain better, a pyrolysis reaction is a thermal degradation reaction in oxygen absent that mean without air. To avoid that tires start to burn. One way to has the minimum quantity of air inside the reactor is fill all space with tires. Here, our first challenge, there are a lot of kind of tires, tires from bicycles, cars, buses, trucks, OTR, inclusive wheels of planes. Our cutting machine is small only can cut tires from R12 to R17, so we don´t cut the bigger tires. A tire has two principal parts a rotation band and profile. In the plant, when operator cut a profile we call this part "rings" a the rotation band we make an arrange, put each rotation band each one inside in from biggest diameter to small this arrange we call in the plant "a kit". Operators have to cut and arrange 5 metric ton per reaction. For process control, all kits and rings have to be weight and register.

Writing about my job It is necessary to practice my english, and write about themes that I feel or I do everyday I think is a good idea to do it, I´m work in a Pyrolysis plant, it is a chemical process the goal in this process is give a final disposal to old tires. First action is received old tires, when a truck arrive to the plant, the driver have to put his truck on the bascule bridge, so we can register the gross weight (that is mean, truck weight plus tires weigth), when this step is already finish, our production supervisor indicate the place where old tires are going to be storage. After, two workers begin to download all tires, and put each one over in rows of 7 tires. When the truck is empty, the driver has to put again the truck on the bascule bridge to register empty truck weight, so the different between gross weight and empty truck weight is the Net weight. And this procedure is our first operation step.

A new day Today, I waked up very early in the morning. I told me to myself, "you have to write in English". Try to write some sentences that explain which is your plan for today. First, I have to answer some emails. Second, I have to make some phone calls to our spare parts suppliers to ask them somethings that we need to make maintenance labour. In the afternoon, I am going to have a meeting with my boss by Zoom. In that meeting, the goal is review all phases that we will take to return to work according new rules to prevent COVID-19. Really all activities are very important today.

I began in Italki today Let me introduce, My name is Oscar Barrera, I am from Venezuela, but I was living in Colombia since 2018. I am Chemical Engineer. My job is in a Pyrolysis Plant. Pyrolysis is a process that by thermal treatment in oxigen absence, we can transform waste tires to oils, carbon black and steel.