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A reactor is made of stainless steel to increase the term of service for 10 years. ( the service term of reactor of ordinary steel is not more than 10-12 loads ( a week), after that period the walls and bottom of the equipment are almost completely burned and the necessity to repair of reactor appears.
Pyrolysis (from Greek. pyr - fire, heat and
lysis - decomposition, decay) is a thermal decomposition of organic
compounds (wood, petroleum, coal and others), in the absence of oxygen
Raw material (waste) is loaded into a container of heat-resistant
material (retort). The retort is placed into the oven. Raw material is
heated by heat transfer through the retort walls and thermally
decomposed ( this process is named pyrolysis) forming a mixture of steam and gas and carbon residue.
Steam gas mixture goes out of the retort through the pipeline, cooled,
then comes to the storage tank and farther to the condensers to
separate the gases from the splashes of the liquid.
The liquid is collected in a storage tank; gas, partially or wholly
is used to support the pyrolysis process, is burned or used to heat
greenhouses, offices and so on. At the end of the pyrolysis process
the retort with semi coke must be unloaded from the oven and the other retort
with raw material is placed into it.
Installation FORTAN consists of: retort oven, retort, refrigeration complex, condensers, gas liquid separators. The retort oven is vertical,the oven shaft is lined with heat-resistant concrete and high-temperature thermal insulation on the basis of ceramic fiber.The fire-bars and gas jet to burn the combustible gases are installed in the bottom of the shaft. The intensification of burning and mixing of flue gases are achieved by air pressurization. The retort with raw material is placed into the shaft of the oven through its opened top. Retort is a cylindrical container of heat-resistant steel, with a lid. Special shutter around the perimeter of contact surfaces of the retort and the oven ensures sealing of the internal space of the furnace. The refrigeration complex is intended for cooling and condensation of gases of liquid pyrolysis products.Gas-steam mixture comes to the refrigeration complex from the retort through the quickly dismountable connection and sylphon. Condensed and uncondensible gases come to the separator through the pipe-line. The separator is a cylindrical container for collecting of the liquid pyrolysis products and partial catching of liquid splashes from the gas stream. The final cleaning of gas from the liquid splashes is carried out in the gas-liquid separator. Combustible gases are forwarded to the gas-jet and / or other users.
Retort with raw materials is loaded outside the oven in a horizontal or vertical position. After loading the retort lid must be closed. The retort is installed in the oven by means of quickly dismountable connection to a refrigeratiom system pipeline. Retort may be installed in a hot oven or in cold one (at startup). For the ignition of the oven solid fuel (wood, coal,semi coke)is loaded onto the fire-bars through the oven door and burned. The intensification of the burning process is provided by air pressurization under the fire-bars, the intensification of gas mixing and regulation of the temperature in the oven is provided with the air pressurization through the air nozzle of a burner. Pyrolysis gas comes to the burner and inflames. With increasing of the gas current the pressurization onto the fire-bars is to be decreased. The end of the pyrolysis process is determined by the reducing of the gas current. To obtain high-quality semicoke process must be carried out to the cessation of gas ("calcination"). At the end of the process it is necessary to stop the pressurization and the gas current for about 30 minutes to reduce the temperature of the retort and oven lining before the retort unloading. After reducing of the temperature the retort is disconnected off the refrigeration complex pipeline, and unloaded from the oven. The other retort with raw materials can be installed into the oven. Unloaded hot retort is cooled in the air. After cooling they open the retort lid and discharge the semi-coke by overturning.
Fire-resistant concrete and ceramic fibers provide high durability and longevity of the oven lining (the estimated lifetime of the oven is not less than 10 years in comparison to the ovens made on the basis of ordinary steel (the estimated lifetime of less than six months)). Concrete lining is maintainable. At the end of the service life the worn lining can be replaced. Pressurization allows to burn low-grade fuels and to minimize the time of the oven heating. The retort of the heat-resistant steel is very resistant to the service conditions and has a small mass. The removable retort allows to almost continuous oven operation, setting and removing the retorts. Semicoke cooling in the closed retorts in the air allows to avoid the semicoke extinguishing with the water and reduce the environmental load. Unloading by overturning allows to avoid the labour-intensive, slow and dangerous manual unloading. The removable retort can be repaired, the most intensively used and non massive part of the retort (bottom) can be changed. The pipelines of steam-gas and refrigeration complex are made so to facilitate the cleaning of possible deposits.
The maximum volume of the liquid fraction and gas output were adopted as the optimality criterion of the pyrolysis process. The optimal temperature area of the technological process is 350-400 ° C, the following products are obtained:
- The liquid fraction 41%;
- Pyrolysis gases to 12%;
- Semicoke (charcoal) up to 40%;
- Scrap metal 8%.
Depending on the type of raw material used the fluctuations in the volumes of products received are possible.
On the request of the customer installation can be completed with automatic sensors: a programmable controller, sensors of temperature, pressure sensors, liquid level sensors, the sensor of the flame, actuators - electromagnetic valves (cutting-off and modulated with a variable degree of opening), semiconductor relays to valves and pressurization. The cost of automatics is 45% of the cost of installation.
Links on this topic::
Process scheme. Technical characteristics of pyrolysis
Description of technological process for waste recycling plants FORTAN
Plant to recycle 60 tons of waste per day and above
Photos of FORTAN installation for processing of secondary raw materials
The most profitable business. Getting fuel out of garbage. Business Plan
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ANNOUNCEMENT BIODIESEL CRIMEA ltd constantly accepts solid waste including used car tires, construction waste, household garbage and other kinds of waste for recycling with the issuance of standard certificates for the environmental authorities. We invite fleets, airports,and other businesses having the above mentioned kinds of waste to cooperation. License No. AB 433550. Inquiries by phone: +380505551800 |
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