Abstract: The vapor generator is constructed with an evaporator of vertical tubes about the combustion chamber and a final evaporator which is disposed between the economizer and at least one superheater within the flue of the generator. The first superheater tubes are vertically disposed and are welded to the tubes of the evaporator in a seamless manner and connect with the vapor outlet of the water separator.

Abstract: The vapor generator is provided with a vapor separator which is connected to an outlet of the partition and which has a water outlet connected to the inlet of the enclosing walls of the combustion chambers. The vapor outlet of the vapor separator connects to a superheater within the generator via platen superheaters disposed within their respective combustion chambers. The vapor separator permits the partition to always be operated with a considerable surplus of water so that no stability problems occur. A water separator is also connected to an outlet of the enclosing walls and has a vapor outlet connected with the vapor outlet from the vapor separator. Various control circuits can be used to regulate the flow of vapor from the vapor separator to the superheater. A branch conduit for the feed water is also connected in parallel with the partition to permit mixing of some of the feed water with the water separated out of the vapor separator prior to passage into the enclosing walls of the generator.

Abstract: The forced-flow steam generator is provided with a control means for controlling the amount of water fed to the evaporator. The control means includes a controller which receives a load-dependent signal and an actual value signal from a temperature measuring means. The steam generator includes an injection line which communicates at a point downstream of the temperature measuring means. The controller may be connected directly to a valve in the injection line in order to regulate the amount of water which is bypassed around the evaporator or may be connected directly to the feedwater supply to maintain a constant flow to the evaporator during injection of water.