F - Mech Eng,Light,Heat,Weapons – 22 – B
Patent
F - Mech Eng,Light,Heat,Weapons
22
B
122/128
F22B 1/00 (2006.01) F22B 29/02 (2006.01) F22B 35/02 (2006.01) F22B 35/08 (2006.01) F22B 37/14 (2006.01) F22D 5/26 (2006.01)
Patent
CA 2035198
20365-3085 Abstract of the Disclosure: A steam generator includes a gas flue having burners for fossil fuel, a gas-tight tube wall with tubes, inlet and outlet headers connected to the tubes, the outlet header being at a higher level than the inlet header, and a down pipe outside the tube wall connecting the outlet to the inlet header. A steam line is connected to the outlet header and at least one heating surface is connected downstream of the outlet header in the steam line. A feedwater line is con- nected to the gas flue and an economizer is connected up- stream of the gas flue in the feedwater line. A regulating device for influencing feedwater flow in the feedwater line detects at least one of: the steam enthalpy in the heating surface or the steam line downstream of the heating sur- face, the steam temperature in the heating surface or m the steam line downstream of the heating surface, the thermal output transfer to the tubes, a ratio of feedwater flow in the feedwater line to steam flow in the steam line, a ratio of injection water flow into an injection cooler connected in the steam line to feedwater flow in the feedwater line, and residual moisture of steam in the steam line. The feedwater line may be connected to the outlet header or the down pipe. A topping header may be disposed at a lower level than the inlet header with the feedwater line being connected to the topping header, and the tube wall may have additional tubes each extending from the topping header and merging with a respective one of the tubes being connected to the inlet header. LAG:cdt
Franke Joachim
Vollmer Wolfgang
Wittchow Eberhard
Aktiengesellschaft Siemens
Fetherstonhaugh & Co.
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