Abstract:
Method and system for the production of a combustible gas from a fuel, comprising the conversion of the fuel, at a temperature that is between 600 and 1000° C. and at a pressure that is lower than 10 bar, into at least a combustible gas that comprises CH4, CO, H2, CO2, H2O and higher hydrocarbons in a reactor installation (1). At least part of the higher hydrocarbons present in the combustible gas is catalytically converted into at least CH4, CO, H2, CO2 and H2O in a reactor (45) at a pressure that is lower than 10 bar. After this catalytic conversion, an amount of H2O and an amount of CO2 are removed from the combustible gas in a separator installation (50) at a pressure that is lower than 10 bar. After the removal of H2O and CO2, the pressure of the combustible gas is raised by a compressor (71).
Abstract:
The present disclosure relates to an integrated process for the production of formaldehyde-stabilized urea, starting with producing synthesis gas and including the preparation of methanol, ammonia, urea, and formaldehyde in amounts appropriate for the final product.
Abstract:
There is specified a gasification reactor (1) having a reaction chamber (4) for the autothermal gasification of carbon-containing fuel to form useful gases, wherein the reaction chamber has a plurality of control inputs (10) which are at least partially independent of one another. The gasification process is controlled by means of the recirculation of the gas within the reactor and/or by means of the addition of gasification agents via the control inputs (10).
Abstract:
Die Erfindung betrifft ein Verfahren und eine Anlage zum Erzeugen von Brenngas und elektrischer Energie mit folgenden Schritten a) Erzeugen eines Produktgases in einer Biomassevergasungseinrichtung (1) aus holzartiger Biomasse, b) Umwandeln des Produktgases in einem Methanisierungsreaktor (3) in einem exothermen Methanisierungsprozess zu einem methanhaltigen Brenngas und c) Erzeugen eines mit Erdgas austauschbaren Gases (Bio-SNG), indem aus dem methanhaltigen Brenngas CO 2 entfernt wird. Erfindungsgemäß wird c) die Abwärme des exothermen Prozesses in dem Methanisierungsreaktor (3) in einem Gas- und Dampfturbinen-Kraftwerk (2) zur Zwischenüberhitzung von Wasserdampf genutzt, der eine Dampfturbine antreibt
Abstract:
A solids circulation system receives a gas stream containing char or other reacting solids from a first reactor. The solids circulation system includes a cyclone configured to receive the gas stream from the first reactor, a dipleg from the cyclone to a second reactor, and a riser from the second reactor which merges with the gas stream received by the cyclone. The second reactor has a dense fluid bed and converts the received materials to gaseous products. A conveying fluid transports a portion of the bed media from the second reactor through the riser to mix with the gas stream prior to cyclone entry. The bed media helps manipulate the solids that is received by the cyclone to facilitate flow of solids down the dipleg into the second reactor. The second reactor provides additional residence time, mixing and gas-solid contact for efficient conversion of char or reacting solids.
Abstract:
A system includes a dip tube configured to direct a gas toward a sump. The dip tube includes an inner surface and an outer surface. The system also includes a quench ring coupled to the dip tube. The quench ring is configured to provide a quench fluid flow to the sump over both the inner surface and the outer surface of the dip tube.
Abstract:
A process for producing synthesis gas from biomass in which biomass is contacted with oxygen and steam, wherein the oxygen is present in an amount effective to oxidize the biomass partially and to heat the biomass to a temperature of at least 500°C and no greater than 750°C At least a portion of the partially oxidized biomass then is treated with oxygen and steam to heat the biomass to a temperature of at least 800°C, thereby producing a synthesis gas, which then is recovered
Abstract:
A gasifier (1) is disclosed combining a fixed bed gasification section (4, 5, 8, 11 and 13) where coarse fuel entering through inlet (2) is gasified and an entrained flow gasification section (7) where fine fuel entering through one or more tangentially fired burners (19) or from a combustion gasification cylindrical chamber (18) is gasified. The fixed bed section includes upper (4 and 5) and lower (8, 11 and 13) sections. Coarse fuel is devolatilized in the upper fixed bed section (4 and 5) and subjected to elevated temperatures sufficient to crack and destroy tars and oils in the effluent gases. The entrained flow gasification section (17) is disposed in a lower plenum adjacent the lower fixed bed section (13). A plurality of injection ports (6, 10) is configured to introduce oxygen, steam, or air into different sections of the gasifier (1) to control temperature and operating conditions. Activated carbon may be formed in the upper fixed bed section (4, 5, 8, 11 and 13) and in the entrained flow section (17). The activated carbon may be used as a sorbent to remove pollutants from the effluent gases leaving the gasifier (1) through exit pipe (15). The gasifier (1) may be used with various coarse and fine fuel feedstocks.
Abstract:
Bei einem Verfahren zur Erzeugung von Prozesswärme und/oder elektrischer Energie für die Zellstoffherstellung, für die Stoffaufbereitung und/oder für eine Maschine zur Herstellung und/oder Veredelung einer Faserstoffbahn, insbesondere Papier- oder Kartonbahn, wird aus den bei der Zellstoffherstellung, der Stoffaufbereitung und/oder der Herstellung und/oder Veredelung der Faserstoffbahn anfallenden Abfallprodukten und/oder aus den bei wenigstens einem anderen Herstellungsprozess anfallenden Abfallprodukten Gas mit möglichst hohem Wasserstoffanteil erzeugt und dieses wasserstoffreiche Gas zur Erzeugung der erforderlichen Prozesswärme und/oder erforderlichen elektrischen Energie verwendet.