Uhde Gmbh

Thyssenkrupp Uhde Gmbh

Thyssenkrupp Industrial Solutions Ag

Thyssen Krupp Ag

Tyssenkrupp Uhde Gmbh

Holger Thielert

Ulrich Poth

Zion Guetta

Johannes Menzel

Martin Reinke

Rainer Worberg

Michael Rieger

Klaus Schüpphaus

Diethmar Richter

Guenter Wozny

Jan Schöneberger

Dirk Scheckreiter

Jan Schoeneberger

Günter Wozny

Jan SCHÖNEBERGER

Norbert Brink

A process for preparing sulfuric acid may involve oxidizing sulfur to sulfur dioxide by way of dried air in a first oxidation stage. The sulfur dioxide may then be oxidized to sulfur trioxide in a second oxidation stage. The sulfur trioxide may be absorbed by sulfuric acid in at least one absorption stage. Further, heated sulfuric acid may be drawn off from the absorption stage and used for generating steam. Process gas from an intermediate absorption stage may be recycled to the second oxidation stage and, in some cases, a final absorption stage after the process gas flows through the second oxidation stage.

Process and device for the preparation of sulfuric acid

In a production mode a process for preparing sulfuric acid may involve oxidizing sulfur to sulfur dioxide in a first oxidation stage, and catalytically oxidizing the sulfur dioxide to sulfur trioxide in a second oxidation stage. The sulfur trioxide may be absorbed in at least one absorption stage. In the production mode, process gases from a last of the at least one absorption stage with respect to a flow direction are discharged. In a standby mode of the process, at least one heating stage for heating the process gases is connected. The process gases exiting from the at least one absorption stage are conveyed to the heating stage, and the process gases are circulated via the heating stage, the second oxidation stage, and the absorption stage.

Method and device for producing sulfuric acid

A process for preparing sulfuric acid may involve melting elemental sulfur in a melting stage to give molten sulfur. Sulfuric acid is subsequently produced from the molten sulfur. Further, sulfur-containing offgases formed in the melting stage may be subjected to oxidation in a supplementary oxidation stage in which sulfur-containing components of the offgases are oxidized to sulfur dioxide. The process may further involve processing the sulfur dioxide to give at least one reaction product. The melting stage may be operated without emissions by processing all of the offgases from the melting stage. An apparatus may be employed for carrying out such a process.

A catalytic reactor may have at least one reactor module and a shell that extends about a reactor center axis. The reactor module may include a gas distribution chamber, a gas collection chamber, and a catalyst. The gas distribution chamber may be connected to a shell-side gas feed. The gas collection chamber may be connected to a shell-side gas discharge. A catalyst bed between the distribution and collection chambers may extend transversely to the reactor center axis. The gas distribution and collection chambers are bounded by the catalyst bed and reactor walls. The gas feed either opens into the gas distribution chamber on the shell side or is connected to a pipe length that extends towards the reactor center axis and opens into the gas distribution chamber in the region of the reactor center axis. A height parallel to the reactor center axis of the gas distribution chamber reduces towards the reactor center axis starting from a mouth of the gas feed in the case of a shell-side connection.

Catalytic reactor

A process for the production of synthesis gas from coke is described herein. The process comprises the steps of: (a) subjecting hard coal to dry pyrolysis, resulting in the production of a gas mixture containing hydrogen, methane, nitrogen and carbon monoxide as major constituents and carbon sulphides as minor constituents; (b) subjecting the gas mixture to hydrogenation at a temperature in the range of 200 to 280&#xb0; C. over a sulphidic cobalt molybdenum catalyst provided on an aluminium oxide carrier material; and (c) separating the hydrogen sulphide obtained from hydrogenation from the gas mixture.

Process for the production of synthesis gas from hard coal

The invention relates to a method of reducing emissions of byproduct gas when charging oven chambers of a battery of coking ovens, on the proviso that the oven chamber () to be charged is opened on the machine side (MS) of the battery of coking ovens, and a block of compressed coal () is introduced into the opened oven chamber (). Byproduct gases released during introduction of the block of compressed coal () into the hot oven chamber (), are discharged through a byproduct-gas manifold () attached to the oven chamber () and are then preferably freed of dust and incinerated. Crude gases formed in the closed oven chambers during coking are discharged through a crude-gas manifold () attached to the oven chambers () and are passed on for treatment by at least one gas scrubber. According to the invention, conduits connecting the crude-gas manifold () and the byproduct-gas manifold () to the oven chambers () are alternately opened and closed such that the byproduct gases that form during the charging of the oven chambers () are admitted only into the byproduct-gas manifold (), and that the crude gases that form during coking in the closed oven chambers are fed only into the crude-gas manifold ().

Reduction of byproduct-gas emissions from a coking-oven chambers

The invention relates to a process for the biological purification of coking plant wastewater that is loaded with nitrogen compounds, cyanides, phenols and sulphides. The coking plant wastewater, for removal of pollutants that inhibit a nitrification, is fed together with a biomass-containing stream of matter to a detoxification reactor that has a gas-treatment zone and a reaction zone. The feed mixture supplied to the detoxification reactor is exposed in the gas-treatment zone to a gaseous oxidizing agent. A stream of matter enriched with the oxidizing agent is fed to the reaction zone in which cyanides and other pollutants inhibiting the nitrification are biodegraded. A stream of matter is withdrawn from the reaction zone and returned to the detoxification reactor. In addition, a wastewater stream from the detoxification reactor is separated by a membrane filtration into a biomass-containing retentate stream and a purified permeate stream. From the retentate stream, a substream which entrains excess sludge is discharged. The retentate stream, after separating off the substream, is recirculated to the detoxification reactor. The permeate stream is further purified by nitrification and subsequent denitrification.

Method and apparatus for biologically treating coking-plant wastewater

A method for removing high-boiling hydrocarbons from water-soluble solvent flows, wherein said solvent flows are produced in industrial processes which circulate a solvent as a part of the process, and the solvent must be periodically or permanently freed of high-boiling hydrocarbons which influence the quality or the desired properties of the solvent in an unwanted way, and water is added for carrying out the method in a phase separator, so that the high-boiling hydrocarbons are separated off because of their immiscibility with water, and then the water-miscible phase containing water and solvent is returned to the process. According to the invention, the proportion of high-boiling hydrocarbons in circulating solvents in an industrial process can be kept permanently low.

Method for removing high-boiling hydrocarbons from solvent flows

A methane-rich gas from synthesis gas is made in a methane reactor with a row of methanation stages and, at an upstream end of the row of methanation stages, a CO conversion stage. An incoming stream of synthesis gas containing CO and His split into a plurality of partial streams, one of which is fed to the reactor upstream of the CO conversion stage. Each of the other partial syngas streams is fed to the reactor upstream of a respective one of the methanation stages such that methanation takes place in each of the methanation stages and gas exits from the stages and mixes with the partial syngas stream being fed to the next downstream stage. A plurality of partial streams are diverted from a product-gas stream issuing from the furthest downstream stage and are each fed to the reactor upstream of a respective one of the methanation stages.

Method and apparatus for making a methane-rich gas from syngas

The invention relates to a process for producing a methane-containing gas from synthesis gas, wherein a synthesis gas containing carbon monoxide and hydrogen is fed for methanation to a reactor system () having a catalyst material, wherein the process gas stream leaving the reactor system () is divided into a product gas stream and a recycle gas stream, and wherein the recycle gas stream, for compensation of the pressure drop, is transported through an ejector () and for cooling is passed together with the synthesis gas into the reactor system (). According to the invention, the product gas stream is compressed to a pressure which is greater than the pressure of the synthesis gas that is fed to the reactor system (). Either compressed product gas or industrial gas from an industrial gas pipe system () is fed as propellant medium to the ejector (). The invention also relates to a methane production plant for carrying out the process.

Method of and plant for making a methane-containing gas from syngas

A device for condensing, separating, and storing sulfur in a Claus plant. having a Claus furnace, waste heat boiler, and Claus reactor. Plant parts are supported on a floor or comparable device, and an immersion chamber is provided below the Claus plant and optionally also below a device arranged upstream for gas scrubbing. The immersion chamber receives the sulfur in a siphoning manner, wherein the excess sulfur flows at least 4.00 meters deeper from the immersion chamber into a ground-level container in which the immersion chamber is arranged. The invention further relates to a method, by means of which liquid sulfur is conducted into an immersion chamber, wherein the immersion chamber is arranged at a height level below the waste heat boiler and the Claus reactor so that the liquid sulfur reaches the immersion chamber without further pumping and overcomes a height difference of at least 4.00 meters.

Device and method for condensing, separating, and storing liquid sulfur in a Claus plant

The invention relates to a method and an installation for producing sulfuric acid. First of all, a product gas flow () containing sulfur dioxide is produced. The product gas flow () is supplied to a reaction chamber (). A catalyst () is located in the reaction chamber (). In the presence of the catalyst sulfur dioxide reacts to form sulfur trioxide. In further parts of the installation the resulting sulfur trioxide is converted to sulfuric acid. According to the invention, an oxidizing gas flow () is supplied to the reaction chamber () alternately with the product gas flow ().

Method and system for the production of sulfuric acid

The invention relates to a method of removing aromatic hydrocarbons from coke-oven gas. The coke-oven gas is contacted with a wash liquid in a gas scrubber, and aromatic hydrocarbons are separated by absorption from the coke-oven gas. Subsequently the wash liquid enriched with aromatic hydrocarbons is heated, and the aromatic hydrocarbons are stripped from the wash liquid using water vapor. After cooling the wash liquid is finally returned to the gas scrubber. According to the invention biodiesel is used as the wash liquid.

Removal of aromatic hydrocarbons from coke-oven gas by absorption

The invention relates to a fission reactor () for a Claus plant, comprising a fireproof lined boiler (), which contains a combustion chamber () with an influx opening for a mixture of fuel gas, air and acid gas containing HS, a catalyst chamber () with a catalyst bed and a chamber on the outflow side () comprising a gas outlet for a hot process gas that contains elemental sulphur. According to the invention, the boiler is configured as a horizontal cylindrical boiler, in which the combustion chamber (), the catalyst chamber and the chamber on the outflow side () are located next to one another. The catalyst chamber is delimited on both sides in the flow direction by gas-permeable chequer bricks () and has a fill opening () on the shell side for introducing the catalyst bed.

Fission reactor for a Claus plant

The invention relates to a method for isolating hydrogen sulphide from coke-oven gas with the subsequent recovery of elemental sulphur in a Claus plant. The hydrogen sulphide is eliminated from the coke-oven gas by gas washing using an absorption liquid. During the regeneration of the loaded absorption liquid, hydrogen sulphide is accumulated in concentrated form and is fed to the Claus plant. Said Claus plant comprises a Claus boiler, a waste-heat boiler, in addition to a reactor, which forms an additional catalyst stage. According to the invention, the Claus plant is operated with a single reactor, which operates at a working temperature of below 250&#xb0; C. The process gas that exits the reactor is returned after the deposition of elemental sulphur with a non-reacted residual concentration of hydrogen sulphide to the coke-oven gas that is to be cleaned, prior to the gas washing stage.

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Dortmund, Germany

Holger Thielert