Steam super heater comprising unround pipes
First Claim
1. A heat exchanger, wherein flue gasses conducted along superheater pipes supply heat for the production of heated steam in said superheater pipes, said superheater pipes having an unround cross section with a first diameter and a second, relatively larger, diameter and wherein a plurality of pipes are connected to headers, wherein said plurality of pipes have the same cross section, characterised in that the superheater pipes are preceded by shield pipes or evaporator pipes (8) that are unround.
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Abstract
The invention relates to a heat exchanger to be used in particular in a waste incineration plant, wherein flue gasses are conducted along pipes through which steam is passed for the production of heated steam. The heat exchanger is comprised of shield pipes (8) and superheater pipes (15) provided immediately behind these. The invention also relates to a heat exchanger, whereby flue gasses are conducted along pipes through which steam is passed for the production of heated steam and wherein the heat exchanger is comprised of superheater pipes, which are unround, with their largest diameter in the direction of the flue gas stream.
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Citations
13 Claims
- 1. A heat exchanger, wherein flue gasses conducted along superheater pipes supply heat for the production of heated steam in said superheater pipes, said superheater pipes having an unround cross section with a first diameter and a second, relatively larger, diameter and wherein a plurality of pipes are connected to headers, wherein said plurality of pipes have the same cross section, characterised in that the superheater pipes are preceded by shield pipes or evaporator pipes (8) that are unround.
- 8. A method of determining the fouling on a heat exchanger pipe, comprising the steps of causing the pipe to vibrate, measuring the vibration pattern generated in the pipe, and determining the degree of fouling, based on the vibration pattern measured.
Specification