Continuous steam generator

Patent metadata

Field	Value
Publication number	US-9267678-B2
Application number	US-200913062700-A
Country	US
Kind code	B2
Filing date	Sep 9, 2009
Priority date	Sep 9, 2008
Publication date	Feb 23, 2016
Grant date	Feb 23, 2016

Abstract

A continuous steam generator including a combustion chamber with a plurality of burners for fossil fuel is provided. A vertical gas duct is connected downstream of the combustion chamber on the hot gas side, in an upper region via a horizontal gas duct. The outside wall of the combustion chamber is formed from evaporation pipes which are welded together in a gas-tight manner and mounted upstream of a water separator system on the flow medium side and from superheater pipes which are welded together in a gas-tight manner and mounted downstream of the water separator system. The water separator system includes a plurality of water separation elements, each element includes an inlet tube which is connected to the respective upstream evaporation for tubes, which extend into a water evacuation tube. A distributer element is arranged on the evaporator side between the respective water separator element and the inlet collector.

First claim

The invention claimed is:

1. A continuous steam generator, comprising:
a combustion chamber including a plurality of burners for fossil fuel;
a vertical gas duct disposed downstream of the combustion chamber and connected on a hot gas side in an upper region via a horizontal gas duct;
the horizontal gas duct;
a plurality of superheater tubes;
a plurality of evaporator tubes; and
a water separation system, comprising:
a plurality of water separating elements, each including an inflow tube section connected to the respective upstream evaporator tubes, and viewed in a longitudinal direction, transitions into a water discharge tube section,
wherein a plurality of outflow tube sections branch off in a transition zone, and are connected to an inlet collector of the respective downstream superheater tubes, and
wherein a distributor element is disposed on a steam side of the water separation element between the respective water separating element and the inlet collector,

wherein an external wall of the combustion chamber is formed from the plurality of evaporator tubes that are welded to one another in a gas-tight manner and disposed upstream of the water separation system and is formed from the plurality of superheater tubes that are welded to one another in a gas-tight manner and disposed downstream of the water separation system, and
wherein the respective distributor element comprises a baffle plate, an inlet tube disposed vertically with respect to the baffle plate, and a plurality of outlet tubes arranged in a star shape around the outside of the baffle plate in the plane thereof such that the flow medium impinges on the baffle plate and is distributed vertically in a symmetrical manner with respect to the inflow direction and conducted into the outlet tubes wherein the plurality of outlet tubes lead at equal intervals into the inlet collector,
wherein the baffle plate is circular and the plurality of outlet tubes are arranged concentrically with respect to a center of the baffle plate at equal spacings from the respective adjacent outlet tubes.

2. The continuous steam generator as claimed in claim 1 , wherein the geometric parameters of the plurality of outlet tubes of the respective distributor element are chosen such that a homogeneous flow distribution to the inlet collector of the respective downstream superheater tubes is ensured.

3. The continuous steam generator as claimed in claim 1 , wherein the respective distributor element comprises between five and twenty outlet tubes.

Assignees

• Brückner Jan
• Effert Martin
• Franke Joachim
• Siemens Ag

Inventors

• Brückner Jan
• Effert Martin
• Franke Joachim

Classifications

• F22B21/341

  Vertical radiation boilers with combustion in the lower part · CPC title

• F22B29/06 Primary

  of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes (combined low- and high-pressure boilers of forced-flow type F22B33/16) · CPC title

• F22B37/26

  Steam-separating arrangements · CPC title