PROCEDURE FOR THE PRODUCTION A CARBON MONOXIDE AND HYDROGEN OF A CONTAINING GAS USING A PLASMA GENERATOR WITH FOLLOWING DESULPHURISATION
The invention concerns a procedure for the production a Carbon monoxide and Wasserstoff of a containing gas with application commercial standard well-known technology and use of raw material, carbon and/or hydrocarbon contains, whereby this gas is usable as reduction gas, gaseous fuel or synthesis gas directly, without energieund costly washing process.
With procedures, which use the burn, in order to supply energy, as well as in procedures, which use other basic materials than dried coke, as for example bituminous coal, pitch and such, a gas is received, soft H2 0 and hydrocarbons just like CO + to I-I2 contains.
Normally on a maximum content on CO2 + H2 0 of approximately 10% in the gas one hang-works, while the content should be at the same time because of heavy hydrocarbons as close as possible with 0%.
During conventional gasification processes, which oxygen gas (air) and steam use, with which the gas and kohlenstoffhalüges material move the against the current, are particularly good it possible, the warmth to use, but can this gas due to the low reaction temperature grolle quantities of tar contain.
In addition one receives a remainder product in the form of ashes, which are to be eliminated with difficulty, without the environment to shelled. Bewächtliche of advantages can be obtained by increase of the reaction temperature in the burn stage, so that ashes melt, and by increase of the process printing. The discharged and hardened cinder is extremely resistantly in relation to leaching out and the Produküon per unit volume of the reactor is increased. In addition the surplus of oxygen can be regarded as RedukUonsprozesse reasonable high ones, i.e. it needs to be burned less at formed Carbon monoxide zn CO2, in order to take for example Wärrneverluste off. The tar problem remains existing however, and the gas cannot be used from there directly, for example as Redaküonsgas.
It was not missing so far at attempts to lower the content of CO2 and H20 because it is often not meaningfully or not possible to select the reaction temperature or the process printing suitably highly so that the portion of CO2 and H2 is unwanted high 0.
E.G. a procedure for the production of reduction gas with little CO2und tt2 0-Anteil is well-known from the DE-OS 2,413,558. Of a Kreislaufgas with high CO2 - to obtain H2 0und Kohlenstoffoder hydrocarbon AnteUen gone out and this totally or partly by a plasma generator led around the temperature suitable for the following reaction.
A similar procedure is well-known from the DE-OS 25 24 177. There it is geoffenbart that one manufactures reducing gases thereby that one brings a fuel and an oxidizer into a Metallbad and in such a way manufactured reducing gases by an electronic torch heated up. Also in accordance with the only after the priority day published EP-/L2-157 917 a gas, which of H2, CO, hydrocarbons or carbon, H2 0 and CO2 contain, in a plasma generator is heated up, in order to receive Rednktionsgas, which consists mainly of CO and H2.
With all these procedures the gas, whose content of carbon or hydrocarbon, CO2 and H2 0 is to be reduced, is heated up in the plasma generator. In the EP-Al-153 235, additionally zuznführende component is suggested to the gas, e.g. 1-I2 is reached to heat up in a plasma generator according to highly and mix with the gas, soduß a sufficiently high reaction temperature.
The invention placed itself the task to create a procedure permitted the use of each boliebigen raw material, which carbon and/or hydrocarbon for the gas production use, and with which commercial standard well-known technology is used, whereby the gas does not have to be subjected energieund costly washing processes, before it is used as reduction gas, gaseous fuel or Synthe, egas. MaW: The procedure is to create a gas, which is poor in also without use of complex Reinigungssmfen sulfur connections, CO2 and H2 0.
This task by a procedure of the kind initially specified according to invention thereby it is drawn that the gas made of a carbon and/or a hydrocarbon as well as a Oxidaüonsmittel containing carrion course material is also introduced at the same time in a plasma generator of air heated up into a reduction chamber, in which the hydrocarbon contained in the gas is divided that the content is steered at CO2 and H2 0 in the gas leaving the additional reactor on under 5%, and that the gas is led after going through the additional reactor by a Kalksteinoder dolomite filling, in which sulfur is removed, remaining hydrocarbon is divided and a reaction with the oxidizing agent is reached.
It was determined that by supply of a hot gas, which was heated up by a plasma generator and from there an extremely high power density possesses a thermal decay of the hydrocarbon in the gas is likewise obtained like the reaction with H20, 02 and/or CO2 in the gas for the training of H2 and CO.
Due to the high power density in the supplied gas a comparatively small mass of gas is needed, whereby the process becomes possible.
The gas can be produced for containing material by pyrolysis or pardelle burn by carbon and/or hydrocarbon as for example peat, hard coal, anthracite coal or forest wastes. If RK 396,366 B coke-oven gas from pyrolysis is to be used by hard coal, further impurities as well as hydrocarbons result. large advantage of the invention consists of that also these are divided in the additional reactor.
The gas is led after going through the additional reactor by a Kalksteinoder dolomite filling, in order to remove sulfur. The limestone or dolomite used for this desulphurisation can work also as catalyst for dividing hydrocarbon and with the reaction with oxidizing agent. Thus the current consumption in the additional reactor can be lowered accordingly.
The content of CO2 + H2 0 in the gas of the additional reactor is steered thereby on under 5%. The controlling of the CO2 + H2 0-Anteils by change of the air supply into the reactor is necessary, in order to achieve a good cleaning from sulfur to. Thus the available invention prescribes the use of air as orifice gas and a relationship CO2 /CO of less than 5%; the EP 153,235 prescribes however a relationship of 10 20%.
Further advantages and characteristics of the invention result from the following detailed description on the basis the enclosed design, which schematically the flow chart one erfindungsgemäl? , EN of gas ore confining process in connection with a following reduction process shows.
In a carburetor or a coke oven (1) a raw gas is produced. The produced raw gas becomes an additional reactor (2) transmitted. In connection with this additional reactor is at least a Plasmagenemtor (3) for the supply of a hot gas with high power density planned. The hydrocarbon in the raw gas is divided in the additional reactor and reacted under training of CO + H2.
Finely divided coke or H2 0 can over lances (4) into the additional reactor to be injected, in order to adjust the hydrogen/carbon relationship.
Subsequently, the gas in the pit ($) is subjected to a desulphurisation, whereby this pit a filling (6) from limestone or dolomite contains is removed, which by a gas density air-lock (7) to be supplied, during used up filling at the ground of the pit by a gas density air-lock (8).
Any hydrocarbons stayed in the gas are likewise catalytically divided into the Kalksteinoder dolomite filling. This can be used, in order the electrical current consumption in the plasma generator to lower (3), which is used for the thermal decay of the hydrocarbon content.
In this way cleaned gas, which essentially only H2 contains + CO as well as a small quantity of H2 0 + CO2, can a chamber (9) to be transmitted, in order regarding its temperature and composition to be controlled, before it into a Sehachtofen (10) for the reduction of oxidic material one introduces.
The produced gas becomes by an inlet (12) at the ground of the Schaehtofens (10) introduced and flows the against the current to the metallic oxide containing material by the Sehaehtofen (10) through. The partial used up gas, which impurities and dust contains, is abgesangt by a discharge opening (13) and cleaned in a Wäseher (14).
The cleaned, partly used gas can then for other purposes be used, as this is indicated by the arrow (15). If required can be transmitted a part of the gas over lines (16, 16a, 16b) again to the procedure and for example in the mixing chamber (9) to be used, around the temperature and composition of the gas which can be introduced into the shaft kiln to steuem. A part again of the gas in circulation brought can be used also in the plasma generator in connection with the additional Reaküonskammer.
The invention is further illustrated by the following example.
ton of forest wastes, which 30% water contained and im übrigen the following composition had C H O N S ashes of 51,6.2 42 0.2,0.5 0.5% become from the top per hour a counter current against the current brought in, while an oxidizing agent at the ground of the carburetor is introduced in the form of on 1000 °C air heated up. At air 3700 Nm3 are added. The blast furnace gas had the following composition CO CO2 H2 H2 0 N2 CH4 25.8 9.8 41.1 4.8 15.8 2.9 RKs 396,366 B simultaneous a Teerpmbe is taken, which shows that the gas contains 3.2 g at Teer/Nm3.
The temperature gas amount to 440 degrees and its volume out-currentend to about 17200 Nm3. The gas is transmitted now to an additional Reaküonskammer and heated up through in plasma generators air heated up.
The necessary amount of air amounts to only about 2100 Nm3. With the help of the plasma generator the temperature of the entering gas is increased to 1250 *C, and this with a current consumption of ann emd 8.7 MWh.
From the pyrolysis gas heated up thus Methanund of tar portions is removed and the chamber leaving gas has the following composition CO 1202 H2 H2 0 N2 28.6 4.8 29.6 13.6 23.4 the mass of gas at leaking out gas amounts to approximately 19900 Nm3. In a method of producing a gas containing carbon monoxide and hydrogen, in which method the gas does not need to be subjected to energy-consuming and costly scrubbing steps before being used as reduction gas, combustion gas or synthesis gas, the gas is produced from material containing carbon and/or hydrocarbon and oxidant and is supplied to a reaction chamber (2) simultaneously with a gas heated by plasma generator (at 3), in order to crack the hydrocarbon in the gas. The gas may be passed through a limestone or dolomite filling to the remove sulphur therefrom. <IMAGE> 1. Procedure for production Carbon monoxide and Wasserstoff containing gas under application commercial standard well-known technology and use of raw material, which carbon and/or hydrocarbon ontl t, whereby this gas directly, without energieund costly Wasehvorgänge, when reduction gas, gaseous fuel or synthesis gas are usable, by the fact characterized that the gas made of a carbon and/or a hydrocarbon as well as a Oxidatiousmittel containing basic material at the same time also in a plasma generator (3) of air heated up into a reduction chamber (2) is introduced is steered, in which the hydrocarbon contained in the gas is divided, the content at CO2 and H2 0 into the additional reactor (2) leaving gas on under 5%, and that the gas after going through the additional Reakfionskammer (2) by a Kalksteinoder Dolomiffüllung (6) one leads, in which sulfur is removed, remaining hydrocarbon is divided and a reaction with the oxidizing agent is reached. 2. Procedure according to requirement 1, by the fact characterized that into the zuslttzliche reactor (2) finely distributed coke and/or water is injected.