Abstract:
Systems and methods are disclosed for pyrolysis of waste feed material. Some systems include a main retort and a secondary retort. Syngas is produced by pyrolysis in the main retort, and is then mixed with combustion air and ignited, in some cases to produce energy. Carbon char travels to the secondary retort and is exhausted from the system through an airlock.
Abstract:
Waste is treated by pyrolysis at a temperature of from 400-700° C. and combustion at a temperature of at least 400° C. Off-gases are catalytically oxidized to reduce emissions. The combusting waste is periodically agitated with high-pressure air bursts to disrupt waste in the chamber and promote even and complete combustion. Air is introduced during pyrolysis to promote controlled flow of off-gas to the catalyst and air and/or water is used to dislodge accumulated ash at the end of the treatment process.
Abstract:
A system and method for collecting hot coal tar gases emanating from a coal containing pyrolytic kiln are described. The hot coal tar gases, comprising a variety of different hydrocarbons as well as inorganic gases arising from the kiln thermal processing are transferred by diffusion and forced convection to a thermal duct in which the temperature is controlled to be maintained at a temperature below that of the kiln. The gaseous hydrocarbon with the highest condensation temperature is the first to liquefy. Additional useful hydrocarbons liquefy as the temperature of the gas continues to cool from the kiln temperature of ˜5000 C to one approaching the minimum duct temperature, ˜175° C. After a number of desirable hydrocarbons present in the coal tar gas have liquefied, the liquid contents are collected, either separately or as a combination of liquid hydrocarbons. The several remaining inorganic and some hydrocarbons gases with condensation temperatures below the minimum duct temperature are separately collected in gaseous form for further processing and/or safe disposal.
Abstract:
A plasma-assisted waste gasification system including a sensing mechanism and process for converting waste stream reaction residues into a clean synthesis gas (syngas) is disclosed. The gasification system includes a first sensor located between a gas quench unit and a heat recovery unit to measure a first temperature and first flow rate of the synthesis gas exiting the gas quench unit; a second sensor to measure a second temperature and a second flow rate of a low temperature synthesis gas entering the gas quench unit; wherein the first sensor and the second sensor are connected to an inferential sensing mechanism. The inferential sensing mechanism is capable of estimating the temperature of the synthesis gas in the reactor, based on the measured first temperature and first flow rate, and the measured second temperature and second flow rate, using a mass-energy balance relationship that is based on the measurements of the two sensors. Another aspect of the invention relates to a control unit to control the temperature of the reactor to a required operating temperature range.
Abstract:
A multi-step process is provided in which waste material is processed in two or more steps. Specifically, an earlier step of the process heats the waste material at a first temperature. This results in a release of vapors for materials having a boiling point that is lower than the first temperature. A subsequent step of the process heats some or all of the remaining waste material at a second temperature, which is preferably higher than the first temperature. The subsequent heating results in a release of additional vapors for those materials having a boiling point that is lower than the second temperature. A system configured to carry out the process is also disclosed.
Abstract:
A waste recycling apparatus includes a temporary storage tank, a pyrolyzing furnace, a first blower, a material storage tank, a second blower, and a rotary valve and a magnetic device. The temporary storage tank carries a waste. The pyrolyzing furnace decomposes the waste into a non-iron material and an iron material. The first blower produces winds to blow the waste into the pyrolyzing furnace. The material storage tank stores the non-iron material and the iron material and includes an outlet. The second blower produces winds to blow the non-iron material and the iron material into the material storage tank. The rotary valve controls a discharge quantity of the non-iron material and the iron material. The magnetic device is installed on a side of the outlet, and the magnetic device attracts the iron material to separate the non-iron material and the iron material. The waste recycling apparatus can recycle wastes automatically.
Abstract:
A reactor (107) for pyrolysis of carbonizable plastic and rubber materials is disclosed including at least an earlier stage reaction chamber (401) and a later stage reaction chamber (105), in which the earlier stage reaction chamber receives the materials for pyrolysis, and the later stage reaction chamber receives treated materials from the earlier stage reaction chamber for subsequent pyrolysis, and the reactor (107) includes a three-way valve (407) for directing the gaseous pyrolysis products from the later stage reaction chamber to one of three pathways, each to a different destination.
Abstract:
A method for producing electric energy from solid and liquid fuels is provided. The fuels are first subjected to a gasification process at high pressure, and the scrubbed gasification gas is fed to a gas and steam turbine process. The combustion of the scrubbed gasification gas in the gas turbine chamber does not occur with air, but with a mixture made of the three components oxygen, carbon dioxide and water vapor. As a result, the waste gas of the gas turbine is made only of carbon dioxide and water vapor. After the condensation thereof, technically pure carbon dioxide remains, which can be dissipated by storage in the deep substrate of the atmosphere.
Abstract:
A multi-step process is provided in which waste material is processed in two or more steps. Specifically, an earlier step of the process heats the waste material at a first temperature. This results in a release of vapors for materials having a boiling point that is lower than the first temperature. A subsequent step of the process heats some or all of the remaining waste material at a second temperature, which is preferably higher than the first temperature. The subsequent heating results in a release of additional vapors for those materials having a boiling point that is lower than the second temperature. A system configured to carry out the process is also disclosed.
Abstract:
The present invention relates to a process and system for gasifying biomass or other carbonaceous feedstocks in an indirectly heated gasifier and provides a method for the elimination of condensable organic materials (tars) from the resulting product gas with an integrated tar removal step. More specifically, this tar removal step utilizes the circulating heat carrier to crack the organics and produce additional product gas. As a benefit of the above process, and because the heat carrier circulates through alternating steam and oxidizing zones in the process, deactivation of the cracking reactions is eliminated.