Abstract:
A method for torrefaction of biomass using a torrefaction reactor vessel having stacked trays including: feeding the biomass to an upper inlet of the vessel such that the biomass material is deposited on an upper tray of a vertical stack of trays in the reactor; cascading the biomass down through the trays by passing the biomass through an opening in each of the trays to deposit the biomass on a lower tray; as the biomass moves around each of the stacked trays, heating the biomass material with an oxygen deprived gas; extracting moisture containing gas having passed through the biomass on the upper trays wherein the extraction is immediately below each of the upper trays; as the biomass undergoes torrefaction in the lower trays of the stacked trays, retaining the gas with the biomass until the biomass falls from the stacked trays to a pile of biomass in the reactor vessel; exhausting gases containing organic compounds volatized by the torrefaction of the biomass through a gas outlet on the vessel at an elevation between the stacked trays and the pile of biomass, and discharging torrefied biomass from a lower outlet of the torrefaction reactor vessel.
Abstract:
The invention provides a method for the reduction of aerosol in an aerosol comprising gas by contacting the aerosol comprising gas with a liquid, wherein the aerosol comprises an aerosol compound and wherein the aerosol compound comprises an inorganic compound, wherein the liquid comprises a liquid compound and wherein the liquid compound comprises an inorganic compound and wherein the liquid comprises a liquid condensate of the aerosol, wherein the liquid has a higher temperature than the aerosol comprising gas, wherein the temperature difference is in the range of 5- 00 °C; and wherein the liquid has a temperature which is lower than the dew point of the aerosol comprising gas, wherein difference between the dew point temperature of the aerosol comprising gas and the temperature of the liquid is in the range of 5-200 °C.
Abstract:
Method and system for the production of solids from raw materials. These materials are subjected to a continuous torrefaction treatment at a temperature of between 200 and 320°C. Heating takes place by means of circulating gases that entor into direct heat exchange with the raw materials fed to the torrefaction chamber. The ga.es liberated during torrefaction are combusted while feeding in oxygen and discharged after the beat has been extracted from the flue gas thus produced. The heat from the flue gas is used to heat the gaseous medium that is fed to the torrefaction chamber. The production of effluent is prevented in that the condensate formed in the process is combusteal, optionally after specific purification steps.
Abstract:
Reactor for producing a product gas from a fuel having a housing (11, 12, 13) with a combustion part accommodating a fluidized bed (7) in operation, a riser (2) extending along a longitudinal direction of the reactor (1), and a downcomer (3) positioned coaxially around the riser (2) and extending into the fluidized bed (7). One or more feed channels (8) for providing the fuel to the riser (2) are provided. The riser (2) is attached to the housing (11, 12, 13) of the reactor (1) in a bottom part (13) of the housing (11, 12, 13), and a part of the riser (2) above the one or more feed channels (8) is moveable with respect to the downcomer (3) in the longitudinal direction of the reactor (1).
Abstract:
Method and system for gasifying biomass. Tar loaded gas from the reactor for gasifying the biomass is subjected to a saturation and absorption treatment with a first and second fluid respectively. The first fluid comprises aromatic hydrocarbons whilst the second fluid comprises linear hydrocarbons. Tars received in the aromatic fluid is entered together with such fluid in a separation column. Separation is effected based on evaporation temperature and the lighter fraction is returned to the inflow of the saturation separator. The heavier fractions are either discharged or sent back to the biomass reactor. An intermediate buffer vessel can be provided between the discharge of the saturation cleaner and the separator.
Abstract:
Reactor for producing a product gas from a fuel having a housing (11, 12, 13) with a combustion part accommodating a fluidized bed (7) in operation, a riser (2) extending along a longitudinal direction of the reactor (1), and a downcomer (3) positioned coaxially around the riser (2) and extending into the fluidized bed (7). One or more feed channels (8) for providing the fuel to the riser (2) are provided. The riser (2) is attached to the housing (11, 12, 13) of the reactor (1) in a bottom part (13) of the housing (11, 12, 13), and a part of the riser (2) above the one or more feed channels (8) is moveable with respect to the downcomer (3) in the longitudinal direction of the reactor (1).
Abstract:
Method and system for gasifying biomass. Tar loaded gas from the reactor for gasifying the biomass is subjected to a saturation and absorption treatment with a first and second fluid respectively. The first fluid comprises aromatic hydrocarbons whilst the second fluid comprises linear hydrocarbons. Tars received in the aromatic fluid is entered together with such fluid in a separation column. Separation is effected based on evaporation temperature and the lighter fraction is returned to the inflow of the saturation separator. The heavier fractions are either discharged or sent back to the biomass reactor. An intermediate buffer vessel can be provided between the discharge of the saturation cleaner and the separator.
Abstract:
Método para la gasificación de biomasa en un reactor (3) a una temperatura de entre 600 y1300°C y purificación del flujo de gas resultante del reactor para la eliminación de alquitranes de dicho flujo de gas, comprendiendo la eliminación de dichos alquitranes en dos fases, donde en la primera fase de limpieza (8) el gas del reactor (3) se satura a una temperatura de entre 250 y 900°C con un primer fluido basado en hidrocarburo que comprende hidrocarburos aromáticos y donde en una segunda fase de limpieza (18) después de la primera fase de limpieza (8) los alquitranes restantes son absorbidos del gas con un segundo fluido basado en hidrocarburo, donde una mezcla de los alquitranes y el primer fluido basado en hidrocarburo resultante de la primera fase de limpieza se lleva a una primera fase de separación (23) separada de dicho segundo fluido basado en hidrocarburo, caracterizado por el hecho de que en dicha primera fase de separación (23) la mezcla de alquitranes y el primer fluido basado en hidrocarburo se separan basándose en la temperatura de evaporación, y donde la parte ligera resultante de la primera fase de separación se añade al flujo de gas del reactor (3) en la primera fase de limpieza (8) y donde se elimina la parte pesada