DE7812100U1 - LYING FLAME PIPE BOILER - Google Patents

Description

f Thyssen Industrie Essen, "19 * 4.1978

fs Aktiengesellschaft PSRP Fr / Hu.

ί: PK 2864

Horizontal flame tube boiler

The invention relates to a horizontal flame tube boiler with Boiler tubes welded into the flame tube.

It is known to improve water circulation in Flame tube boilers are to be installed in the flame tubes with the open ends above and below the center of the flame tube in protrude the water space. For example, DE-GM 1 975 246 provides a Boiler pipe system of ring and half-ring pipes with longer pipe sections running parallel to the longitudinal axis of the flame tube distributed over almost the entire length of the flame tube, to be arranged near the inner wall of the flame tube. This arrangement of the boiler pipes, which is useful for improving the water circulation does not bring any advantages for the heat transfer to the inner wall of the flame tube, since the boiler tubes form the inner wall of the flame tube shield against the radiation of the flame. A flue gas turbulence occurs in the area close to the inner wall of the flame tube arranged boiler pipes, so that a heat transfer by convection is not or only to a small extent is possible.

The invention has for its object to design a flame tube boiler of the type mentioned so that the Heat transfer is improved.

-β *

This object is achieved in that the Boiler pipes in the area of the rear end of the pipe as a vertical, the cross section of the flame tube covering tube bundles are arranged.

/ 3

In order to also have an over- I

To be able to install a heater is in the embodiment of the invention

tion provided that in the tube bundle from the end of the flame tube g

several boiler tubes are cut out and into the so formed, |

Pipe lanes running parallel to the longitudinal axis of the flame tube over 1 heat pipes can be inserted in one at the end of the flame tube; bolted superheater flange housing are attached. Γ

The advantage achieved by the invention is that;

large heating surfaces are housed in a small space and ζ

thus a good one due to the large temperature reduction of the smoke gases Efficiency is achieved.

An embodiment of the invention is shown in the drawing

and is described in more detail below. |

Show it

1 shows a vertical section in the longitudinal direction through a horizontal flame tube boiler,

FIG. 2 shows a view in direction A according to FIG. 1, but with the burner and dismantled

3 shows a horizontal section along the line B-C according to FIG. 1 at the level of the center of the flame tube through the rear end of the flame tube.

As shown in FIG. 1, the horizontal flame tube boiler consisting essentially of the boiler shell 3> the boiler bottom k and 5 and the flame tube 6 is fastened to a base frame 1 with support plates 2. In the area of the rear end of the flame tube 6, a boiler tube 7 is welded in that the. Cross section of the flame tube 6 covered. The smoke gases generated by the oil or gas burner 8 are thus passed through the lane between the boiler tubes of the boiler tube bundle 7 at high speed before leaving the boiler.

/ Ί

Fig. 3 shows the staggered arrangement of the boiler tubes of the boiler tube bundle 7 »those for good heat transfer through convection is cheap, being housed in aiif tight space large additional heating surfaces of the boiler tube 7 a cause large temperature reduction of the flue gas and thus

I show a good degree of efficiency. |

For applications in which superheated steam is to be generated instead of saturated steam, several boiler tubes are cut out in the boiler tube bundle 7 from the flame tube end. Superheater tubes, which are fastened in a superheater flange housing 10 screwed to the end of the flame tube 6, are inserted into the tube lanes thus formed and separated from the combustion chamber 9 by a few boiler tubes and running parallel to the longitudinal axis of the flame tube. In the exemplary embodiment according to FIG. 3, three stirring lanes are provided in which superheater tubes 11 are arranged in pairs next to one another. The superheater tubes 11 are each welded into an upper intermediate header 12a, 12b or 12c and a lower intermediate header 13a, 13b or 13c. The upper intermediate headers 12 are welded into a superheater inlet header 14 and the lower intermediate headers 13 are welded into a superheater outlet header 15.

At the free end, the intermediate collectors 12 and 13 are each connected to a superheater pipe 16 via reducers 17. the The diameter of the intermediate headers 12 and 13 are chosen so that they enter the pipe lanes of the boiler tube bundle with little play are insertable.

For applications in which the feed water is preheated is required by the flue gases, a feedwater preheater 19 can be used directly using a transition housing 18 be attached to the rear end of the flame tube 6 or to the free flange of the superheater flange housing 10.

Claims (2)

Thyssen Industrie Essen, 19-4-197B Corporation. PSRP Fri / Hu. PK 2864 ■ Sayings Lying flame tube boiler with welded into the flame tube Boiler tubes, characterized in that the boiler tubes in the region of the rear flame tube end as a vertical, the Cross section of the flame tube (6) covering boiler tube bundle (?) are arranged. 2. Horizontal flame tube boiler according to claim 1, characterized in that that in the boiler tube bundle (7) several Sie.iero? xe are cut out from the end of the flame tube and into the so formed, Pipe lanes running parallel to the longitudinal axis of the Flusim pipe Superheater tubes (ll) can be pushed in, which are in a superheater flange housing (10) screwed to the end of the flange tube. jj are attached. / 2