Bayer Aktiengesellschaft

Ec Erdolchemie Gmbh

Martin Schweitzer

Uwe Listner

Kurt-Wilhelm Eichenhofer

Claus Mueller

Martin Kürten

Alfred Lippmann

Winfried Vaulont

Joachim Krupp

Klaus-Peter Grabowski

Holger Kirchmann

Josef Heger

Klaus-Peter Ochel

Günter Dräger

Karel Capek

The invention relates to a process for the continuous preparation of oleum of a concentration of 10 to 45% by weight of SOand/or sulphuric acid of a concentration of 94 to 100% by weight of HSOby combustion of sulphur with atmospheric oxygen according to the principle of superstoichiometric combustion, cooling the resultant sulphur-dioxide-containing gases to 350&#xb0; C. to 500&#xb0; C., catalytic conversion of these cooled gases to give sulphur-trioxide-containing gases in the presence of a vanadium-containing catalyst using single or double contact catalysis, absorption of the sulphur-trioxide-containing gases after cooling, if appropriate removal of liquids from the gases after absorption and energy recovery, with liquid sulphur being injected into the hot combustion gas stream perpendicular to the main direction of flow in the form of a fan using one or more bimodal fan-type nozzles.

Process for the combustion of sulphur for the preparation of oleum and sulphuric acid with reduced (NO)x content

Method and apparatus for wet-cleaning crude gas streams, the method involving a flow of the crude gas stream without a pressure drop or with a low pressure drop up to 30 mbar, preferably up to 20 mbar, flowing through one or more parallel venturi throats which is/are sprayed with a scrubbing liquid via one or more periodically pulsating hybrid nozzles.

Method and device for liquid purification of crude gas flows

The invention relates to a method and a device for the simultaneous atomisation and dispersion of at least two liquids using propellant gas, whereby the resulting gas-liquid mixture is led through an atomising chamber comprising expansion zones arranged in series and flows out in the form of a spray cone from a nozzle orifice mounted downstream of the atomising chamber.

Method and device for the simultaneous dispersion and atomisation of at

In the method, the liquid waste substance is vaporized and oxidized in a stream of hot flue gas 4. This stream of flue gas 4 contains the oxygen necessary for oxidation. The essence of the method is that the liquid waste substance is sprayed into the stream of hot flue gas 4 as a fan-shaped flat jet with a component which is perpendicular to the main direction of flow, by means of one or more dual-substance nozzles 6 which are operated in a pulsed mode at a frequency of 5 s.sup.-1 to 70 s.sup.-1, and preferably 10 s.sup.-1 to 20 s.sup.-1, a fan-shaped spray carpet 7 with relatively large droplets of large range and a fan-shaped spray carpet 7 with relatively fine droplets of small range being generated in an alternating cycle at each dual-substance nozzle 6, so that the stream of flue gas 4 is supplied alternately with finely sprayed droplets of small range and large droplets which penetrate the flue gas with a relatively large range of throw. Numerals refer to FIG. 1.

Method for thermal oxidation of liquid waste substances w/two-fluid

In the device for selective non-catalytic reduction of nitrogen oxides, a liquid nitrogen-containing reducing agent is sprayed through two-component lances into a stream of hot flue gases. Spraying occurs in pulsatory operation at a frequency of 5 to 70 per second, preferably 10 to 20 per second. As a result of this mode of operation, a spray cone of relatively coarse long-range drops and a spray cone of relatively fine short-range drops are produced alternately at each two-component nozzle. The reducing agent is ammonia dissolved in water (ammonia solution) at flue-gas temperatures of 1060.degree. C. to 1170.degree. C. The device for working the method comprises a flue-gas duct 3 incorporating a number of two-component lances 4 operated by a pressure medium. The liquid and gas feed pipes for each two-component nozzle lance 4 are connected to a first resonance chamber 15 disposed in the two-component nozzle and upstream of at least one additional resonance chamber 18 separated from the first resonance chamber 15 by a restrictor 17. The last resonance chamber 18, considered in the direction of flow, is then directly connected to the outlet opening 19 of the two-component nozzle.

Method of removing nitrogen oxides from hot flue gases

In a combustion process, liquid or gaseous residues having little or no calorific value are supplied to a flame in the main combustion chamber in addition to the fuel gas and the air for combustion. Stabilization of the flame and hence a reduction in the emission of nitrogen oxides is achieved by preheating the fuel gas and introducing it into the main combustion chamber at a temperature above its ignition temperature.

Method of stabilizing a combustion process

The invention relates to a device for feeding gases, aerosols and/or mixtures of gases and solids into the combustion of a steam boiler or other combustion chambers using heat, and a process for diminishing pollutants, which are formed when burning gases, aerosols and/or mixtures of gases and solids in steam boilers or other combustion chambers using heat.

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Leverkusen, Germany

Martin Schweitzer