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Continuous evaporator

a technology of evaporator and evaporator chamber, which is applied in the direction of machine/engine, steam generation using hot heat carriers, lighting and heating apparatus, etc., can solve the problems of comparatively more expensive construction, and achieve the effect of simple construction, reliable operation of waste heat steam generator, and cost saving

Inactive Publication Date: 2011-12-29
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]The object underlying the invention is thus to specify a waste heat steam generator of the type identified above which has a particularly high operational reliability together with a particularly simple construction.

Problems solved by technology

For the purpose of avoiding this effect, it would be possible to provide chokes or pressure equalization lines, but these would mean a comparatively more expensive construction.

Method used

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  • Continuous evaporator
  • Continuous evaporator

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Embodiment Construction

[0019]The once-through steam generator 1 for the waste heat steam generator 2 shown in the FIGURE is connected downstream from a gas turbine, not shown here in more detail, on its exhaust gas side. The waste heat steam generator 2 has a surrounding wall which forms a heating gas duct 5 through which the exhaust gas from the gas turbine can flow in an approximately horizontal direction as heating gas, as indicated by the arrows 4. Arranged in the heating gas duct 5 is a number of evaporator heating surfaces 8, 10, designed according to a once-through principle. In the exemplary embodiment shown in FIG. 1, each of two evaporator heating surfaces 8, 10 is shown, but a larger number of evaporator heating surfaces could also be provided.

[0020]Each of the evaporator heating surfaces 8, 10 shown in the FIGURE incorporates a number of rows of tubes, 11 and 12 respectively, each in the nature of a nest of tubes, arranged behind each other in the direction of the heating gas. Each row of tube...

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Abstract

A continuous evaporator for a horizontally constructed waste heat steam generator is provided. The continuous evaporator includes a first evaporator heating surface having a plurality of essentially vertically arranged first steam generator tubes through which a flow medium can flow from bottom to top, and a second evaporator heating surface which is mounted downstream of the first evaporator heating surface on the flow medium side. The second evaporator heating surface includes a plurality of additional essentially vertically arranged second steam generator tubes through which a flow medium can flow from bottom to top. The first steam generator tubes are designed in such a manner that the average mass flow density which may be controlled in the full load operation does not fall below the predetermined minimum mass flow density in the first steam generator tubes.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is the US National Stage of International Application No. PCT / EP2010 / 051425, filed Feb. 5, 2010 and claims the benefit thereof. The International Application claims the benefits of German application No. 10 2009 012 322.9 DE filed Mar. 9, 2010. All of the applications are incorporated by reference herein in their entirety.FIELD OF INVENTION[0002]The invention relates to a once-through evaporator for a horizontally constructed waste heat steam generator with a first evaporator heating surface which incorporates a number of first steam generation tubes, the arrangement of which is essentially vertical and through which the flow is from the bottom to the top, and another second evaporator heating surface, which on the flow substance side is connected downstream from the first evaporator heating surface, which incorporates a further number of second steam generation tubes the arrangement of which is essentially vertical and t...

Claims

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Application Information

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IPC IPC(8): F22B1/18
CPCF22B1/1815Y02E20/16F22B29/062F01K23/10F22B1/18F22D7/00
Inventor BRUCKNER, JANFRANKE, JOACHIMSCHLUND, GERHARD
Owner SIEMENS AG