DE958297C - Tubular heat exchanger - Google Patents

Description

(WiGBl. P. 175)

ISSUED MARCH 7, 1957

GERMAN PATENT OFFICE

PATENT LETTERING

CLASS Al / GROUP INTERNAT; CLASS F 25h ■

':' ..-. K ii63ola / iff

12 ^ 2

. Wilhelm Lenz, Stuttgart-Bad Cannstatt

has been named as the inventor

Kohlenscheidungs-Gesellsctiaft m.b.H., Stuttgart

Tubular heat exchanger

Patented in the territory of the Federal Republic of Germany from October 14, 1951

Patent application published September 4, 1952

Patent issued January 24, 1957

The invention relates to a tube bundle consisting of heating gases by means of support acted upon heat exchanger, the tubes of which on support tubes extending transversely to them stored graze. :

In the previously common heat exchangers of this type, the heating surface tubes were 'with one laid a mutual distance from each other, which at least corresponded to their own diameter, as it was appropriate or necessary for structural considerations and reasons of keeping reserves, to form the supporting tubes from tubes of the same diameter. This meant that the rough- .. fixed gas velocities in the heating surface, since a reduction in cross section inevitably also occurs. an increase in the number of tubes in the direction of flow of the heating gases. On the other hand, since the resistance on the flue gas side is proportional to the number of pipe rows, a significant reduction in cross-section and speed Increase in capacity not feasible due to the expected increased train losses.

Now to an increase in the gas velocities and thus the heat transfer from the heating medium to the work equipment without increasing the number of tubes and so that the loss of tension can be carried out according to the invention, the tube of the Heat exchanger laid within the heating gas flow with a mutual distance from each other, which is smaller than the outer diameter of the tubes, and there will be the. Pipes to the Dagerang Support tubes, the diameter of which is greater than the clear distance between two adjacent tubes of the heat exchanger is closed by piping

Mixing sections combined and the mixing sections again divided into several pipes by pipe forks. ■■. '..

This makes it possible, on the one hand, to increase the heating gas velocities and thus to high them Heat transfers to come, but on the other hand to keep the tried and tested support tube suspension. The one caused by the narrowing of the cross section This increases the pressure loss in the heat exchanger according to the invention balanced that the number of rows of tubes inevitably decrease traufi. Furthermore, the heat exchange still promoted by the fact that by mixing in the pipe forks what. known per se is, the "parts of the medium to be heated up" initially flowing in the core of the pipes to the pipe wall to be driven. At the same time, as a result of the subsequent redistribution of the Mixing flow on several pipes ensures temperature compensation between the partial flows flowing through the differently heated pipes.

The mixing sections are within the heat transfer area arranged so that the mixing tubes themselves serve as a heat exchange surface.

A simple Ausfü'hrungsform the invention consists in that two or four pairs in the same row or in parallel rows Pipes are combined to form a Mi'sehstrecken. This version comes in particular at horizontally and vertically aligned arrangement of the pipes into consideration. They are useful at -horizontal arrangement of the pipes one or more mixing sections or pipe fork as known stored on a special support element, while the remaining mixing sections on each be supported under her lying mixing section. If the pipe division is staggered, the two or more four of the pipes, which are arranged in pairs at an angle to one another, are combined to form a Mdsch section.

ν The support elements for the heating pipes can themselves be designed in a known manner as pipes of the heat exchanger and the pipe forks of the heating pipes with the support pipes yer- '. tied noses. _:

In the i drawing is the subject of the invention shown in several forms of execution. It shows

Fig. Ι a vertical section through a ^: heat exchanger along the line AB in Fig. 2, Fig. 2 horizontal sections along the lines CD and EF in Fig. 1,

Fig. 3 and 4 vertical partial sections corresponding to Fig. Ι for heat exchangers of another embodiment. '■'

The heat exchanger is used as a secondary heating surface in a steam boiler. Its pipe division is less than twice the outer diameter of the heating pipes, both in the horizontal and in the vertical direction. According to Fig ι. 2 and the heating pipes 1 are offset _to-N ordered today. In each case two diagonally lower heating pipes 1 are brought together by means of a pipe fork 3. On both sides of a support pipe 2 running perpendicular to the heating pipes 1, two pipe forks 2 arranged next to one another at the same height are combined again by a pipe fork 4 with a larger cross-section, so that a total of four heating pipes open into the pipe fork 4 from one side and in the extension each pipe fork 4 is again dissolved into four heating pipes. The pipe fork 4 rests on a nose 5 of the support pipe 3.

According to Fig. 3, the heating pipes 1 are arranged in alignment. On both sides of the heating tubes running perpendicular to Tragr'ohres serving in each case two are connected in parallel in the same height and extending side by side tubes 1 by means of a pipe 3 _a fork together. ¹ The lowermost tube fork lies on a nose 5 of the support tube 2. Each tube fork 3. is firmly connected to the tube fork, which is initially above or below it, in the middle of a welding point 7.

Fig. 4 also shows the aligned heating pipes. On both sides of the support tube 2, two heating tubes running next to one another at the same height are joined together _{in a tube fork 3 ß.} Two ¹ of the first, above or underneath one another, Rohrgabelm 3 · _β are combined by means of the pipe fork 4 again, 'so that a total open out in the tube fork four heating tubes. 1 The pipe fork 4 is fastened to the support pipes 2 by means of a bracket 6. A medium flows in the pipes 1, the temperature of which is different from the temperature of the medium flowing around the pipes, for example steam or air flows through the heating pipes, while flue gases from a furnace flow around the pipes.

Claims (1)

PATENT CLAIMS: I. Consisting of a tube bundle, acted upon by hot gases through contact Heat exchangers, the tubes of which are stored on the supporting tubes running transversely to them, characterized in that the tubes of the Heat exchangers within the heating gas flow with a mutual distance from one another which is smaller than the outer diameter of the pipes, and the pipe for storage on support tubes whose diameter is greater than the clear distance between two adjacent tubes of the heat exchanger, through tube forks to mixing sections united, and the mixing sections through, 115 Rohrgalbein are again divided into several pipes. "■. 2 ¹ . Tubular heat exchanger according to Claim 1, characterized in that the mixing sections are located within the heat transfer area. 3. Röhreimwärmeaustauscher according to An ^ Proverbs 1 and 2, characterized in that two or more tubes arranged in pairs in parallel rows are combined in the bucket mixing and distributor piece, ■ ' 4 · Tubular heat exchanger according to the claims ι to 3, characterized in that> ß a horizontal arrangement of the tubes or several mixing sections are stored on special support elements and for the rest Mixing sticks serve as a support. 5. Tubular heat exchanger according to the claims ι to 3, characterized in that the M-ical sections are mounted on trailing tubes, which themselves serve as heat exchanger surfaces. 6. Röhrenwärmeau'stiauscher according to the claims ι .bis 3, characterized in that two or four pairs in parallel Rows and pipes arranged offset to one another are combined to form a mixing section. ¹ considered publications: German Patent Nos. 483 202, 557 887, ' _: 572270,743574;
U.S. Patents No. 2 033 077, 2 057 622. 1 sheet of drawings 609 832 2.57