Abstract: A clamping system for preventing detrimental tensile and shearing stresses in heating walls used for example as partitions in industrial furnaces, comprises clamping plates adjoining opposite end faces of a heating wall plate, yoke-shape beams facing each clamping plate and interconnected by cross tie rods, and pressing elements between the beams and the clamping plates. The bias of the pressing elements is adjusted so as to decrease from the center of the clamping plate towards the upper and lower edges of the heating wall plate, the material of respective clamping elements being selected such as to keep the interfering forces within the limits of 5 to 20% of the original clamping forces, the resultants of the clamping forces being directed to the marginal area of each clamping plate, and the roughness in excess of 2.5 millimeters between the clamping plate and the heating wall plate being reliably compensated.

Abstract: A device for cooling a stream of hot producer gas exiting from a gasification reactor operating at an increased pressure, includes a set of water spraying nozzles directed against the producer gas stream. Water feeding conduits connected to the nozzles pass through a sealing web provided between the pipe wall structure of the reactor and a separate pipe wall structure of a gas outlet connection piece provided above the discharge opening of the reactor. The geometric locations of respective nozzles are on a circle whose diameter is larger than that of the gas discharge opening and is smaller than the inner diameter of the pipe wall structure of the connection piece.

Abstract: An arrangement for monitoring pressure pulses in gas/particulate material media flowing through pipelines and/or containers includes an annular metallic housing which surrounds a flow passage and has in its interior an annular chamber which extends around the flow passage and is separated therefrom by a barrier layer of a wear resistant and porous material. Connecting ports for connecting the annular chamber respectively to a pulse conduit leading to a pressure measuring device and to a source of a rinsing gas open into the annular chamber.

Abstract: In regenerative coking ovens having vertical heating flues cooperating in pairs, high level and low level combustion stages and means arranged at the bottoms of respective heating flues to recirculate the flue gas, the following measures insure a substantially reduced generation of NO.sub.x contents in the flue gas: the recirculation current rate is between 20% and 50%, the combustion stage ratio is between 40% and 70% and the second combustion stage is arranged between 35% and 55% of the height of the heating flue.

Abstract: A method is disclosed for the separation of aromates from hydrocarbon mixtures employed as entry products, by means of extractive distillation, employing as selective solvent N-substituted morpholine, the substitutions of which display no more than 7 C atoms. The raffinate produced as top product of the extractive distillation is subjected to a distillation, whereby the produced sump product with a solvent content between 20-75% by weight and a temperature between 20.degree.-70.degree. C., is led into a separation container and there separated into a heavy and a light phase. The heavy phase is then recycled into the extractive distillation column, whereas the light phase is recycled into the raffinate distillation column.

Abstract: In a method for safely operating a coal gasifier which is indirectly cooled by passing a heat-carrying oil through a cooling jacket of the gasifier, the pressure of the heat-carrying oil is continually measured after having passed through the cooling jacket. If the measured pressure falls below a predetermined pressure, the supply of coal and gasifying agents to the gasifier is interrupted, the passage of heat-carrying oil is interrupted and water or steam is passed through the cooling jacket until the gasifier is safely shutdown.

Abstract: A Venturi tube which is especially suited for the differential pressure measurement of flowing gas/particulate material media with high dust loading at temperatures exceeding 100.degree. C. and at elevated pressures includes a pressure-resistant metallic jacket and an inner lining of wear-resistant porous material which is accommodated in the jacket and bounds a flow-through passage with the Venturi configuration. Respective annular chambers are situated at the inlet region and at the smallest-diameter region of the flow-through passage, there annular chambers being separated from the flow-through passage by respective layers of wear-resistant porous material and being connected by respective pulse conduit with a differential pressure measuring device.

Abstract: In a method for the regeneration of washing solution, which is used for washing nitrous oxide and sulfur dioxide out from exhaust gases, a portion of the washing solution containing a complex-forming substance, which is Iron (II)-chelate complex of ethylenediaminotetraacetic acid (EDTA), is removed from the washing solution flowing in a closed circuit, and imidodisulfonate in this portion is separated from the washing solution and is further used as a commercial product.

Abstract: In a method of treating waste water obtained in a direct washing with water of raw gas in a plant for a gasification of gas, the waste water is first settled in a settling tank and a resultant concentrated slime-containing water is subjected to a multi-stage oxidation with air or oxygen only at the temperatures of between 20.degree. C., and 80.degree. C., and the slime-containing water obtained after the oxidation is conveyed to a filtration system or a slime-depositing container.

Abstract: A soot blower for the removal of deposits collected on the surfaces of walls forming a chamber, through which gases containing solid particles flow, is integrated in one of the walls which form that chamber. The feeding pipes of the blower for feeding a blowing agent into the chamber are formed in the region of the line which defines the outer face of that wall.

Abstract: Disclosed is a method of purifying by-product gypsum by making it into a sludge and washing the sludge in a single, multi-stage filtering washer. The washing liquid is recovered from the filtrate from the first stage of the washer and subject to neutralization in a two-stage neutralizing unit. The sludges separated in the neutralizing unit are dried and the excessive washing liquid from the second stage of the neutralizing unit is further processed in an evaporation stage.

Abstract: A device for gripping a specimen for applying to the same tensile or torsional strain includes two plates spaced from each other and a tubular spacer extended between the two plates and accommodating a specimen. The specimen is attached to the plates by respective nuts. One end of the specimen extended outwardly from the respective plate and nut is formed by a threaded pin, on which a pulling device for applying tensile stress onto the specimen, is set. The other end of the specimen has a square portion to which a tap wrench is applied, which, with the aid of two bolts positioned on one of the plates, applies torsional strains to the specimen.

Abstract: A process is disclosed for the separation of an aromatic hydrocarbon from a hydrocarbon mixture of varying aromatic content, by means of extractive distillation, employing as a selective solvent, an N-substituted morpholine, wherein the N-substituent contains up to 7 carbon atoms. In the entry product, the weight ratio of light non-aromatic hydrocarbons to heavy non-aromatic hydrocarbon should amount to at least 0.4 to 1. The light non-aromatic hydrocarbon necessary for adjustment of this ratio can be either introduced directly into the lower part of the extractive distillation column, or added to the entry product before introducing the latter to the extractive distillation column.

Abstract: A pin for holding and/or cooling of a ceramic coating in hot reaction chambers has a pin shaft and a pin cap connected with one another in firm and heat-conductive manner, wherein the pin shaft is composed of material corresponding to the reaction conditions in the hot reaction chamber, and the pin cap is composed of a material corresponding to the material of the wall of the hot reaction chamber.

Abstract: In a method of subsequent treatment of sulfur gas from waste pyrolysis, the sulfur gas is cooled after hot dust removal in many stages to an end temperature between 0.degree. and 5.degree. C., wherein the components [condensate] separated from the gas are subdivided into a heavy tar, an oil and a water phase. The obtained heavy tar is supplied back to the pyrolysis reactor, whereas the oil phase is again used partially or completely for gas treatment, and the separated water is discharged from the process. The end product of the method is a stable gas which can be used for heating.

Abstract: Disclosed is a method for recovering pure aromatic substances from a mixture of hydrocarbons containing both aromatic and non-aromatic fractions. The input mixture is fed through an extractive stage provided with a preliminary distillation column. In the preliminary stage the aromatics-containing product is treated at a pressure up to 20 bar and a temperature up to 300.degree. C. The pressure is adjusted to a value at which the operational temperature of the preliminary stage is higher than the pressure and temperature in the extractive stage and the heat of the vapors discharged from the preliminary stage is used for heating the extractive stage.

Abstract: A pin for holding and/or cooling ceramic coating in hot reaction chambers is composed of a pin shaft and a pin cap which are connected with one another by a diffusion welding forming therebetween a homogeneous material connection possessing a high strength and high heat conductive properties.

Abstract: In a multi-stage washing process for the removal of ammonia from coking oven gas, a portion of waste water, produced during the separation of ammonia from ammonia-containing water in an ammonia still, is supplied to an ammonia water at the final stage of washing, at which ammonia is washed out from gas with ammonia-free water.

Abstract: In a method of removing heavy tar produced in a coke oven during the cooling of a coke-oven gas from the coke-oven gas, the heavy tar pieces are crushed in a pulverizer to obtain particles of the size of less than 1 mm. The heavy tar particles are then rarefied by the addition to them of a mixture of tar and water. The resulting mixture is maintained under the temperature of 55.degree.-75.degree. C. and then transported to a charge coal which is then charged into the coke-oven.

Abstract: A door structure for coke oven is disclosed which includes at least two locking head rails and having a door body which is continuously made of a flexible and elastic material. According to this invention, the material of the door body and the sealing membrane or its compression elements are dimensioned such that ratio of the rigidity of the door body to the specific contact pressure of the sealing membrane is so small that the thermal deformation of the body is compensated mainly by the combined locking forces exerted by the head rails and by the contact forces exerted by the sealing strip.