New Questions and Answers.
February 27, 2013
The Technokomplex company presents answers to recently asked questions of potential clients and partners. The information is available in English and Russian languages in FAQ and Вопрос-ответ sections on the website.
How the Pirotex pyrolysis plant differs from other plants and horizontal systems in particular:
1.How can sorbent and activated carbon be obtained in the Pirotex auxiliary equipment?
Activation process should begin with removal of scrap metal from carbon residue. Pre-shreddering should be done next (with fractions of 50-500 μm). Only then the required product(activated carbon or sorbent with its micro- and mezopores maximum openning)can be obtained in rotary drum-type furnace in superheated vapour environment under the temperature of 850-1030C.
2.How can the forced crucible cooling reduce the carbon residue cooling time?
In case of the Pirotex plant the forced crucible cooling is carried out by air-water stream through 8mm wall. The thickness of carbon residue is 60-75 cm and its weight is 121-160 kg. All this allows reducing of cooling time up to 4.5 hours and unloading crucible safely.
If carbon residue is not cooled down a spontaneous ignition may occur and may lead to unpredictable results. For this reason pyrolysis cycle of 1.5 tons of mechanical rubber goods may last for 1.5 days.
3.What material is preferable for the Pirotex crucibles production?
For crucible production the heat-proof ductile alloy metal (12x18N10T or 12x18N12T) is used. Such metal can stand sudden heating or cooling for a long time allowing for a possible burnout control(for 3 000 - 7 000 hours in course of time).
4.How to carry out pyrolysis process in the Pirotex plant without liquid fraction loss during condensation?
As hydrocarbon secondary decomposition takes place during condensation it may lead to up to 10% of liquid fraction loss. For this case Pirotex plant is provided with pyrolysis fan that pumps out gas and vapour. Frequency controller automatically change the rotation of impeller in accordance with collector pressure.
5.How to clean the Pirotex plant?
Pirotex plant is cleaned by wet coagulation system with pyrolysis fuel produced by the plant itself. The cleaning is carried out without interrupting of pyrolysis process which makes separation of heavy fractions from medium and light possible and allows operating of the equipment without any additional mechanical cleaning.
The only thing to be cleaned is a crucible bend (with its total size of 67 cm). A special device made by american manufacturers is used for this purpose. It helps to automatically get rid of clog
within 20 seconds.
Clean viscosity oil is repyrolized when sufficient quantity of it is collected(100-200kg).
7.What burners are used in the Pirotex plant?
Pyrolysis fuel obtained from mechanical rubber goods pyrolysis consists of dispersed carbon in the form of thin needles of 2-5 nm in size. These needles taken by gas-vapour mixture may clog passes of any complex burner devices (both foreign and domestic) in which pressure feed is used.
After analysis of a large number of Pirotex buyers complaints on clog and damages the Pirotex manufacturers developed special burners for this certain type of oil.
Such burners can work both on pyrofuel and pyrogas which means the separate usage of two types of burners (one for fuel combustion and other for gas combustion)is not required. The burner mode needed is chosen by simple changing of the valve position.
The peculiarity of such burners is a simplicity of its operation and high performance factor. The burners automatic control allows using them in safe-mode operation.
8.Is it possible that during pyrolysis process gas goes out?
Gas comes into system under constant pressure that excludes the possibility of an incident.
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