An injection cooler for cooling hot steam conducted in a flow direction in a pipeline, a) having an injection device which can be connected to the pipeline and which has multiple injection nozzles, b) having a regulating element that can be connected by way of a connector to a coolant supply, c) wherein, in the regulating element, there is arranged a valve arrangement by means of which the coolant feed to the injection nozzles of the injection device can be regulated, and d) having coolant feed lines that are provided between the injection device and the regulating element, e) wherein a separate coolant feed line is provided for each injection nozzle, f) wherein those ends of the coolant feed lines that are associated with the injection device are fastened to a common first flange plate which can be fixed to a mounting surface on the injection device, g) wherein those ends of the coolant feed lines that are associated with the regulating element are fastened to a common second flange plate which can be fixed to a mounting surface of the regulating element, h) wherein the injection device has a tubular intermixing section which can be connected to the pipeline, wherein the intermixing section has a Laval-nozzle-like longitudinal section along a longitudinal axis, i) wherein the injection nozzles and/or the associated nozzle inlet line are arranged, at least in sections, in a wall of the intermixing section, and j) at least two injection nozzles are arranged, spaced apart from one another in the circumferential direction, on or in the intermixing section, k) wherein the injection nozzles are arranged lateral opposing to the longitudinal axis and have a nozzle opening that is conical or funnel-shaped, characterized in l) that a swirl or mixing insert is arranged in front of the conical or funnel-shaped nozzle opening in each of the injection nozzles. a) having an injection device which can be connected to the pipeline and which has multiple injection nozzles, b) having a regulating element that can be connected by way of a connector to a coolant supply, c) wherein, in the regulating element, there is arranged a valve arrangement by means of which the coolant feed to the injection nozzles of the injection device can be regulated, and d) having coolant feed lines that are provided between the injection device and the regulating element, e) wherein a separate coolant feed line is provided for each injection nozzle, f) wherein those ends of the coolant feed lines that are associated with the injection device are fastened to a common first flange plate which can be fixed to a mounting surface on the injection device, g) wherein those ends of the coolant feed lines that are associated with the regulating element are fastened to a common second flange plate which can be fixed to a mounting surface of the regulating element, h) wherein the injection device has a tubular intermixing section which can be connected to the pipeline, wherein the intermixing section has a Laval-nozzle-like longitudinal section along a longitudinal axis, i) wherein the injection nozzles and/or the associated nozzle inlet line are arranged, at least in sections, in a wall of the intermixing section, and j) at least two injection nozzles are arranged, spaced apart from one another in the circumferential direction, on or in the intermixing section, k) wherein the injection nozzles are arranged lateral opposing to the longitudinal axis and have a nozzle opening that is conical or funnel-shaped, l) that a swirl or mixing insert is arranged in front of the conical or funnel-shaped nozzle opening in each of the injection nozzles.