DE1601310A1 - Melting chamber continuous boiler - Google Patents

Description

Besctoeitmng

1101310

S clime 1 z-chamber flow ke s s el

The invention relates to a once-through boiler with melting chamber firing, "in which the pipe systems are particularly tightly welded together as wall-forming elements.

The invention is based on the object of building such a melting chamber boiler in such a way that the thermal stresses of the walls through which the flow passes one after the other at the welding points are within permissible levels
The limits remain and the radiation flow also when the system is switched off

009845/0347 _CQpyr

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§Fl3§eli | §§? fe.ilka / paeri3 tileiehmäßig heated wir4 »if z» B? §H = s mi i # ilig§ti? E drive © <i # r to start and stop fji§i | t aJL | § fe | lkamn | epn heated $ i ^ 4 «S§ % ■ §% ^ vqQq ^ Boilers 4ie§sp Ar1t iie

a concern fflit einwgilafyeiep Aichefluß oiine (Jefähpiunii der sejje-

Brenner leicijt swffeQfet get ?! lies if one or aßip Teilfeapmeyn niiphib are fired »

With the Burehlauf ^ steam generator after the invention walls made of curved pipe systems for subdivision the Schiselzlcammer is still a partition between Schinelzkammer and subsequent radiation train in itself already known way formed by pipe systems,

For a once-through steam generator of the one described above Art, the invention provides that the burner ceiling, the partition and the ash grate; each sub-chamber consists of a double System of back and forth, nested tube by tube, upward and downward flow, welded together Drilling consist of and, the upper reversal points the front edge of the burner ceiling made of pipe loops; are the upward flowing water or steam-water-GenioCh into a downwardly flown tube lying next to it divert, whereby the connection to the similarly switched Pipe system of the next subchamber through unheated pipes

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rather the number of parallel strands below the melting chamber takes place,

The pipe systems of the individual sub-chambers are therefore for the Working equipment flow connected in series. This one Piping systems is advantageous to the tubing of the partition walls upstream, these tubes being heat-movable in particular are attached to the septum or front wall of the melting chamber by means of sliding connections. It is useful to to provide two partitions or some other even number of partitions in order to this way an odd number of Teilkaiauiern to enable. The odd subdivision of the Melting chamber has an even-numbered subdivision the advantage that a symmetrical extraction of the flue gases into the radiation flue is always made possible. Already with three sub-chamber numbers it is easily possible to cover a wide load range of the boiler, always with a symmetrical flue gas flow consists. While at full load all three partial ca: nn: ern are in puncture, you can switch to partial load shut down the middle sub-chamber, while finally at low load with the shutdown of the two outer sub-chambers only the middle subchamber works.

Due to the double tube nested up and downward flow pipe system in the area of the burner ceiling, Partition wall and ash grate with transition from upward gear to downward gear through pipe loops can reduce the thermal stresses between the upward and downward gears kept within tolerable limits will. Since the welded pipe system of the

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Partition between the melting chamber and the radiation flue is applied approximately with water of boiling temperature, there is no difficulty in this wall with the outer walls the melting chamber and the radiation train, consisting of a helical winding with a slope of the tubes on the front and • Weld the rear and horizontal pipes on the side walls together. It must also be taken into account that for the tubing of the septum and partition walls proportionately large pipe diameters are required to ensure the strength of these walls and to avoid that falling large cinder blocks with the ash grate enclosed in this pipe system pipe bends cause.

The partition walls are used to increase the stability of the flow advantageously formed by heated risers and unheated downpipes, with the last 'downward gear' from a single Downpipe. To solve the problem of dividing the working medium emerging from these heating surfaces to the The pipe system winding up around the outer walls can, according to a further embodiment of the invention, be a pipe system of vertical distributors, e.g. radial distributors, are used will. Accordingly, the number of parallel strands of the after the septum from the work equipment is afterwards interspersed, writhing around the outer wall of the melting chambers The welded-together pipe system is chosen so that it is a whole multiple of the number of parallel strands dos pipe system of the septum amounts to. In this way, a largely equal "

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& ä04ge ¥ granting of the work equipment "from $ & i & e ■ Sariailelstrang to the correspondingly erfciiite Äöpahl fön Faralie! rohren dje ^ SG ^ outoiBny / iclciuag £ & r d | e cross winds and

On the basis of the drawing iöll the eifiiiduiig »ä || ei s» The figures indicate a ÄJü8füferiiiij | istoeiS | ßiei'ig for the invention .essential 'filing in strong ye seneöiatisciier' thirste llung _% the v © rnehiliöJi which are symbolized file aind in all figures *! provided with reference marks. " - "

Figure 1 shows a pass kegsei with melt chewing furnace in a section parallel to the side surface »Figure 2 a horizontal cut above the ash funnel while the figures. 3 and 4 settlement and schematic representations illustrate the individual heating surfaces »- ·

The work equipment enters into the sighting of arrow 1 Inlet distributor 2, which is located below the boiler finds. The boiler itself essentially contains a melting chamber 6 divided into three feilkainmern 3, 4, 5, to which " a "Strählungszug 7-connects * Melting chamber 6 and connect ™ ' the radiation train 7 are arranged vertically, with the Firing, as indicated by arrows 8 and 9, on the Sohinelzkainmer ceiling 10 is arranged. Between SehmelzkamBier 6 and Radiation train 7 is a partition wall 11 with an asciiefängröst 12 .provided., lter Asc.heai) flui3 13 is accordingly dea? §Ä% division

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The combustion chamber is divided into three parts 14 »15 and 16. The radiation train T is ^{provided with a constriction on the 1} Steil 17 ι the angles of which to the vertical are exactly as large as the bevel angles on the front and back of the achfiielzkammer below. The spiraling pipe system is finally led to an outlet collector 18. The position and arrangement of further boiler parts adjoining this radiation train is of subordinate importance for the essence of the invention! so that "to simplify the representation, no other gas drafts are shown any more.

From the inlet manifold 2, the working medium passes through the partition walls 19 and 20 (heating surface I and II) between the partial burners 3> 4 and 5 of the Schraelzkamrner the partition walls are designed so that heated risers and unheated downpipes uarstellen the essential feature of this pipe system. After passing through the first partition 19 (heating surface I), the working fluid flow is brought together by the outlet sampler 21, whereby several downpipes, labeled 22, establish the connection to the inlet manifold 23 of the pipe system II for the wide partition 20. After passing through the heated riser pipe dtessr partition wall 20, the working medium flow is combined in the outlet sampler 24 and passed through a single downpipe 25 with a large cross-section to the collector 26 , which is the inlet sampler

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the following, continuously switched heating surfaces III to V are used. .

From the inlet manifold 26, the working medium flow per subchamber runs through the melting chamber floor, the air duct, the partition and the burner ceiling Upward gear to downward gear takes place through pipe loops 29, 33 and yj in FIGS. 1 and 4 at the front edge of the burner ceiling. As particularly FIG. Section 27 of the sub-area 28 of the partition 11 and to the section 10 a of the Schraelzkamaerdecke 10 in the area of the sub-chamber 3 and then slides back again erzig

Pairs of pipes, with the pipes leading up and down alternately lying next to one another.

The forty-four parallel pipes 30 now represent the. unheated transition to the corresponding hot surfaces IV the middle sub-chamber 4, the working medium flow Over the section 15 of the bottom Ii belonging to this subchamber, the ash grate 12,31, the partition 11,32,

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the ceiling 10, 10 b and back over the return loop. In a corresponding manner, the heating surfaces V in the area of the right sub-chamber 5 are also connected via the connecting pipes the sections 16, 35 and 10 c flowed through, the associated reversal loops being denoted by 37. The outlet pipes 38 open individually into one of the forty-four Manifold 39 · The heating areas III, IV, V can optionally also be exchanged for one another, whereby in particular the contact with the central combustion chamber 4 begins or ends.

As already mentioned, relatively large pipe diameters have to be dug for the partition and the partition walls in order to ensure the strength of these wall parts. It must in fact be particularly expected that the respective portions fall 27, 31 and 35 of the ash catcher grate slag lumps so that the danger for pipe bending ν is, if the tubes are dimensioned ni'cht strong enough.

Of the forty-four outlet pipes 3 & must now be Steam-water mixture distributed on the following heating surfaces VI with a helical winding along the outer walls be, this helical winding has a significantly larger number of parallel strands and tubes of smaller diameter is formed. In the illustrated embodiment, there is one for each of the forty-four outlet pipes a distributor 39 with six outlets each is provided. the

00984

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Pipes 40 and 41 illustrated in FIG. 4 accordingly each represent 132 individual pipes, which now wind around the combustion chamber and radiation flux on the front and rear with an incline and horizontally on the side walls. The winding begins with tubes 42 on the front side (Via) as well as with drilling on the back side (VIb), the connection on the side walls by tube sections 43 »45 of the heating surface parts VI c and VI d takes place «

7 claims
4 figures

009845/0347

Claims (2)

- IO - PLA 68/1221 Patent claims 1 * Continuous steam generator with wall-forming, in particular Gas-tight welded pipe systems and with dividing walls in several melting chambers divided into individual melting chambers Combustion chamber and with a partition between this and the subsequent radiation train, the partition walls and the partition wall are formed by pipe walls welded together, characterized in that the sections the burner ceiling (10a, 10b, 10c), the partition (11; 28,32,36) and the ash catcher grate (12j 17,31,25) of each sub-chamber (3,4,5) from a double system of to and fro returned again, nested one inside the other tube by tube, welded together tubes through which flow up and downward flows and the upper reversal points on the front edge of the burner ceiling (10) are formed from pipe loops (29,33 »37) are the upward flowing water or steam / water mixture redirect into a downwardly flowed pipe lying next to it, and that the connection of one Pipe system to the similarly switched pipe system of. next subchamber by unheated pipes (30,34) the same Number of parallel strands below the melting chamber (6) takes place. 2. Steam generator riach claim 1, characterized in that these pipe systems (III, IV ₁ V) the tubing (1,11) of the partition walls (19 _f 20) within the melting chamber (6) is connected upstream.
3 · Steam generator according to claim 2, characterized in that ^{Skn / B1} PM the partitions (19, 20) are heat-movable »in particular by means of sliding connections to the partition (11) and / or the front wall (42) are attached to the melting chamber (6). 4. Steam generator according to claim 1 to 3, characterized in that that two partitions (19, 20) or some other even number of partitions are provided. 5. Steam generator according to claim 1 to 4, characterized in that the partition walls (19 »20) with heated risers and unheated downpipes (22) are formed »whereby the last downward passage consists of a single downpipe (25). 6. Steam generator according to claim 1 to 5 »characterized in that that the number of parallel strands of the following after the partition (11) in the flow direction of the working medium, around the outer wall of the melting chamber (6) and the radiation train (7) are welded pipe systems (VI) a whole multiple of the number of parallel strands of the pipe system (III, IV, V) of the partition (11) is dimensioned and the distribution of the work equipment via radial distributors (39) takes place with a vertical axis. 7 «Steam generator according to claim 6, characterized in that that the angles of the drawing in '(17) to the vertical have the same inclination as the slopes on the lower one Part of the melting chamber at the front and back, around here with the welded-together diagonal winding of the tubes (VI) to get the same pipe spacing. 00984 5/0347