Conduction through type steam generator

Abstract

The invention relates to a straight-through steamer, comprising straight smoke conduit formed with air-tight tube wall. The tubes of tube wall is spirally installed or screw-thread at lower part of smoke conduit where the mineral fuel burner is set and is vertically fixed at upper part of smoke conduit, the smoke conduit underpart passes through bottom of smoke conduit on lower part and upper part of smoke conduit passes through transverse wall of smoke conduit on upper part and is contracted by lateral section formed by tube wall through smoke conduit or passes through lower bound of heating surface set inside smoke conduit. The total height of smoke conduit lower part (4) is constructed according to formula of 1<=Hges / 2 .(B+T) .tanalpha<=2.0; tube wall (3) of smoke conduit comprises a lower part and at least another tube wall section, and the inside of lower tube wall section (8) is smooth and is ribbed with tube of tube wall section (9); the relationship between height of lower tube wall section and total height is constructed according to formula of 0.25<=H1 / Hges<=0.6; and relationship between the height of tube wall section (9) and total height is formed according to formula of 0.25<=H2 / Hges<=0.75; and the tube inner lateral section for tubes (10,11,12) are constructed according to formula of 1<=A1 / A0<=1.25 and 12 / A1<=1.25.

Description

technical field [0001] The invention relates to a straight-through steam generator (Durchlaufdampferzeuger) with a vertical flue formed by gas-tight tube walls, the tubes of which are threaded or helically arranged in the lower part of the flue where the fossil fuel burner is located and placed in the The upper part of the flue is arranged vertically, and its lower part passes through the bottom of the flue at the lower end and its upper part passes through the transverse wall of the flue at the upper end, through the constriction of the cross-section formed by the pipe wall of the flue or through a The lower edge of the heating surface is limited. Background technique [0002] This or the same kind of straight-through steam generator is from Springer Publishing House 1994 published in 1994 by Professor Karl Strauβ Professor of Engineering "Kraftwerkstechnik (power station technology)" second edition Chapter 4.4.2.4 "Zwangdurchlauf (forced straight-through)" (see 171 - pp. ...

AI Technical Summary

Problems solved by technology

A disadvantage manifested in the construction of this different type of evaporator tube is that, compared to internal multi-ribbed tubes (MLR), internal single-ended ribbed tubes (SLR) generate a higher pressure in terms of the working medium due to the increased flow resistance Loss, the pressure loss forms additional operating costs of equipment or makes the overall efficiency of the power station using this straight-through steam generator worse

Another disadvantage is the increased installation outlay for connecting the MLR tubes with the SLR tubes and, if required, again with the MLR tubes and increased costs by using and reserving different types of evaporator tubes

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