摘要:
Method and apparatus for producing synthesis gas comprising the steps of combusting (4) a combustible gas to form hot flue gasses (7), passing the flue gasses (7) through heat storing means (1) so as to heat the heat storing means (1) to an elevated temperature, using the heat thus stored to heat biomass (2) to an elevated temperature so as to form synthesis gas, and withdrawing at least part of the synthesis gas formed, wherein following heating of the heat storing means (1) gaseous medium is circulated through the heat storing means (1), the biomass (2) and back to the heat storing means (1). Furthermore computer program product for performing the method of the invention and the use of the produced biogas are disclosed.
摘要:
A method for producing syngas from preferably vegetal biomass is described. The method provides for the use of a fixed bed gasifier, equipped with two reactors. The biomass is fed to both reactors together with a primary flow rate of air. Advantageously, the method according to the present invention is different from the known art since a secondary flow rate of air is withdrawn from the first reactor at the area where the biomass dries, and fed to the second reactor at the area where the biomass dries, and vice versa, alternately during time. Alternatively, an oscillating air flow is created in each reactor. The achievable result is a greater syngas production, but not exclusively. The syngas quality is improved too, since the biomass has a longer time for completing the gasification reactions.
摘要:
The present invention relates to a method for producing a synthesis gas from municipal solid waste (MSW) and, more particularly, from the fraction thereof called refuse-derived fuel (RDF). The method comprises a step of gasification on a bubbling fluidized bed at atmospheric pressure and temperatures in the range of 750°C a 850°C, using oxygen-enriched air as a gasifying agent, and a step of immediate cleaning and conditioning of the synthesis gas, mainly based on the use of a catalytic reforming reactor comprising a bed formed by a metal catalyst, which operates at a temperature between 750°C and 850°C, where the endothermic reforming process is carried out with water vapor from tars and other hydrocarbons.
摘要:
An apparatus, system, and method for processing hydrocarbon-containing wastes are described. The system and method include the use of a gasification apparatus comprising a rotary kiln reactor and a gas distributor. The rotary kiln reactor and gas distributor are configured to generate multiple reaction environments within the gasification apparatus. Each of the reaction environments has unique temperature reaction conditions to suit various physical and chemical properties associated with processing of the varied-source hydrocarbon-containing wastes.
摘要:
A method of generating syngas as a primary product from renewable feedstock, fossil fuels, or hazardous waste with the use of a cupola. The cupola operates selectably on inductive heat alone, chemically assisted heat, or plasma assisted heat. Additionally, the operation of the cupola is augmented by the use of direct acting carbon or graphite rods that carry electrical current for additional heat generation into the metal bath that is influenced by the inductive element. The method includes the steps of providing a cupola for containing a metal bath; and operating an inductive element to react with the metal bath. Feedstock in the form of a combination of fossil fuel, a hazardous waste, and a hazardous material is supplied to the cupola. A plasma torch operates on the metal bath selectably directly and indirectly. Steam, air, oxygen enriched air, and oxygen are supplied in selectable combinations.
摘要:
A second stage gasification unit in a staged gasification integrated process flow scheme and operating methods are disclosed to gasify a wide range of low reactivity fuels. The inclusion of second stage gasification unit operating at high temperatures closer to ash fusion temperatures in the bed provides sufficient flexibility in unit configurations, operating conditions and methods to achieve an overall carbon conversion of over 95% for low reactivity materials such as bituminous and anthracite coals, petroleum residues and coke. The second stage gasification unit includes a stationary fluidized bed gasifier operating with a sufficiently turbulent bed of predefined inert bed material with lean char carbon content. The second stage gasifier fluidized bed is operated at relatively high temperatures up to 1400° C. Steam and oxidant mixture can be injected to further increase the freeboard region operating temperature in the range of approximately from 50 to 100° C. above the bed temperature.