Abstract: In a method of stripping ammonia from water using steam in countercurrent flow, wherein steam is supplied over a sump of a stripper and directed along with the stripped gas component from a head of the stripper, the method comprising keeping the counterpressure constant while the temperature of supplied ammoniacal water is elected and the partial pressure of the component to be stripped is correspondingly lowered by adding compressed saturated vapors which have not been cooled and correspondingly reducing the steam volume.

Abstract: Process and apparatus for wet-quenching of hot-coke unloaded from a coke producing oven use water quenching from exclusive overhead tanks in two distinct consecutive phases so as to minimize the wasteful coke-dust generated and so as to limit the final maximum-water content in the produced coke. A high rate of water flow under controlled pressure head is used for a short period of time in the initial phase wherein coke-dust particles generated and rising in the water vapor cloud are washed down and prevented from entering the quenching hood; in a second and final stage, a low rate of water flow is maintained for a longer period of time wherein owing to the hot surface of coke having been already cooled in the first phase, coke-dust is not generated as much, and, the required limits for final water content can easily be maintained.

Abstract: The invention makes possible a coking operation largely or completely eliminating waste water by converting the gas condensates obtained from the coking plant by a reverse osmosis process into a permeate which can be recycled to the coking operation, and a concentrated lye.

Abstract: A coke-oven door for use in combination with a coke-oven chamber having an upright doorjamb has a door panel whose periphery is complementary to the doorjamb and which is provided with a seal extending around that periphery between the same and the doorjamb. A plug with a heat-insulating outer wall is carried on this panel within the seal and projects through the doorjamb into the chamber. This plug is formed with a vertically extending and upwardly open passage bounded by a metallic inner wall having gaps by which gases produced during coking adjacent the plug enter the passage on their way to a flue, exchanging heat through the metallic wall with the charge in the oven and thereby aiding the coking operation.

Abstract: A coking chamber of a coke-oven battery, with heated longitudinal walls interconnected by a doorjamb at each end, is closed by a pair of doors sealingly fitting into these doorjambs. Each door has a vertical channel separated from the exterior by an outer wall with a heat-insulating layer and from the interior of the chamber by an upright metal plate facilitating thermal conduction therebetween. The channel is accessible at various levels or over its entire length to gases evolving from a charge inside the chamber which, in rising toward the roof of the chamber, retransmit some of their heat through the metal plate to the charge for enabling substantially uniform heating thereof from four sides.