DE1426611A1 - Steam boiler - Google Patents

Description

Dipl.-Ing.F.'Weickmann, Dr. Ing.A.Weickmann, Dipl ^ IncH-Weickmann Dipl.-Phys. Dr. K. Fincke patent attorneys t MÖNCHEN 27, mohlstrasse it. phone number 413921/22 'HZODI 1

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Aktiebolaget Lindholmens Varv, Gothenburg, Sweden

Steam boiler

Me invention relates to a boiler, the so-i, for example, an internal combustion engine may be heated as associated with flue gases of the boiler furnace, usually an oil burner, probably with exhaust gases. Both heat sources can be used either simultaneously or at different times. Steam boilers of this type are generally used on ships where the heat content of the exhaust gases from the ship's propulsion engines is to be used and where a steam boiler must still be heatable when the ship's propulsion engines are out of operation or when their exhaust gases are necessary for the operation of the ship Steam boiler cannot give off the required amount of heat.

Since it is not desirable, the exhaust system of the internal combustion engine with the exhaust system of the oil-fired

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to connect directly, steam boilers of this type are usually two separate, in one common Provided pipe sets arranged in the water space of the boiler, of which one for the passage of the exhaust gases of the internal combustion engine and the second for the Flow of the flue gases from the oil furnace is set up. With previously known designs of steam boilers of this type, the kettle's water rura usually consists of a substantially cylindrical one Pressure vessel in which the exhaust gas heating pipes and the smoke gas heating pipes are arranged parallel to each other. However, this arrangement of the heating tubes has disadvantages. One of these disadvantages is due to the fact that the exhaust gas heating pipes and the flue gas heating pipes are usually different Have temperatures, which is why they tend to expand differently, vas, since the Flue gas heating pipes and the Rauehgasheizröhre in proportion are arranged at a small distance from each other, considerable V / ürmesspannungen in the parts of the Dupckbehälters caused, in which the Roursätze are housed. For this reason, especially large ones occur Heat stresses in the pipes themselves. The interior of the pressure vessel is also viewed as a result difficult, because the space between the pipe sets, if the dimensions of the boiler are not chosen larger,

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which is too small for this purpose than it is necessary with regard to the space requirements of the pipes. Around An observation of the inside of the boiler, especially at the pipe ends, where deposits and corrosion are most likely occur to enable, the pressure vessel must therefore be chosen to be considerably larger than for the Required space for the pipes.

With the steam boiler according to the invention, these disadvantages are avoided.

The invention relates to a steam boiler in which the Exhaust gas heating pipes and the flue gas heating pipes almost perpendicular to each other and partially crossing in the V. 'water room of the boiler are arranged. This arrangement of the pipes ensures that the exhaust gas heat. pipes and the flue gas heating pipes do not have to be fastened tightly to one another in the same boiler parts, which is why they can expand essentially independently of one another, so that no additional Tensions in the pipes and in the other boiler parts occur, which are due to Temperature differences between the exhaust gas heating pipes and the flue gas heating pipes can arise.

The exhaust gas heaters are available in two parallel versions, 909832/0004 _ _

preferably equally large group divided, which are arranged at a mutual distance. The flue gas heating pipes are in the by the two exhaust heating pipe groups Defined space arranged, and the space near the ends of the exhaust gas heating pipes is kept free. Consists the water space of the boiler, for example, consists of an almost cylindrical pressure vessel with a perpendicular Axis in which the two exhaust heating pipe groups are perpendicular are arranged with the pipe ends fastened in the two sitrn bottoms of the container, enable the free Spaces between the two exhaust heating pipe groups in the Near the two end bottoms of the container the inspection of these container parts. Even so, the inner one The space in the container is well used because the majority of the space between the two exhaust heating pipe groups the flue gas heating pipes running through this space perpendicular to the exhaust gas heating pipes stands.

Further details emerge from the following description of an exemplary embodiment with reference on the enclosed figures. They represent:

Fig. 1 shows an axial section through the steam boiler the line I-I of FIG. 2.

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Pig. 2 is a section along the line H-II of the figure

Pig. 3 shows a section along the line IH-III of the figure and

Fig. 4 is a plan view of the steam boiler.

The steam boiler according to the invention has a cylindrical pressure vessel 1 which is filled with water in the operating state. In the container 1 there are ä perpendicular to the container wall parallel Abgasheizrohre 2, which are attached to the ends in the lower front base 3 and the upper end floor. 4 The exhaust gases, for example the exhaust gases of an internal combustion engine, are fed to the pipes on the lower end base 3 of the container 1 through exhaust gas inlet nozzles 5 connected to this end base, after which they flow off after flowing through the exhaust gas heating pipes 2 through the exhaust gas outlet connection 6. The exhaust gas heating pipes are divided into two groups 2a and 2b of equal size, which are arranged symmetrically on a diametrical plane through the container 1 at a mutual distance so that there is a free space in the form of a "street" between the two exhaust gas heating pipe groups 2a and 2b . In this room

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7 a set of flue gas heating pipes 8 is housed. These tubes 8 run horizontally, i.e. perpendicular to the exhaust heating pipe groups 2a, 2b. In the described Embodiment is assumed that the boiler with Oil firing is provided and includes a combustion chamber, which consists of a lower, at the lower end floor 3 of the container 1 fixed cylindrical part 9 and from a connected to the cylindrical part, im Cross-section of almost semicircular flame tube 10 is made. The flue gas heating tubes 8 are on their flame tube sides Ends inserted into the substantially flat part of the lateral surface of the flame tube 10, while them at the other ends in the opposite part of the shell of the container 1 or one with the shell connected pipe sheet are inserted. The lower part 9 of the combustion chamber has a lateral opening 11 for an oil burner not shown. The flue gases flow from the flame tube 10 through the flue gas heating tubes 8 to a flue gas box 12 arranged outside the container and from this through a gas outlet

With the shown fastening of the exhaust gas heating pipes 2 and the flue gas heating pipes 3, the different Expand heating pipe groups independently of one another. Since the flue gas heating pipes 8 in the combustion chamber 9>

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run perpendicular to the longitudinal axis of this chamber, they are due to the thermal expansion of the combustion chamber 9 »10 essentially only exposed to bending stresses. Because the space 7 between the two exhaust gas heating pipe groups 2a and 2b is left free both on the lower front base 3 and on the upper skirt base 4, these parts of the container are easily accessible for inspection of the same. To this end is a Manhole 14 in the jacket of the pressure vessel 1 at the lower part of the free space 7 between the two exhaust heating " pipe groups available. Corresponding manholes not shown in the figures can be similar Way to be present in the upper part of the container. Despite advantageous use of the boiler room for the two Flue gas heating tube groups 2a and 2b and the flue gas heating tube group 8 the inside of the boiler is easily accessible to an observer.

In the embodiment shown in the figures, the λ

Boiler has a steam dome 15 which is located directly on the upper end floor 4 just above the combustion chamber 9f 10 can be arranged, since in this part of the upper end floor no exhaust gas heating pipes are attached are. It is thereby possible to keep the pressure vessel 1 completely filled with water during operation.

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Claims (1)

" ⁸ " K26611 Y I.) Steam boiler with two sets of in one common Heating pipes arranged in the water space, one of which is for the flow of, for example, an internal combustion engine originating exhaust gases is used and the second for flue gases of a furnace of the steam boiler, thereby characterized in that the exhaust gas heating pipes (2) and the flue gas heating pipes (8) are substantially perpendicular to one another run through the water space of the boiler (1) and at least partially in a common part of the Water space are arranged crossing each other. 2. Steam boiler according to claim 1, characterized in that the exhaust gas heating pipes (2) in two parallel to each other extending and preferably equally large groups (2a, 2b) are divided, which are at a mutual distance are arranged, and that the flue gas heating pipes (8) in the space (7) between the two exhaust gas heating pipe groups (2a, 2b) are arranged. 3. Steam boiler according to claim 2, characterized in that the flue gas heating pipes (8) fill only a central part of the space (7) between the two exhaust gas heating pipe groups (2a, 2b), and that the space (7) is in the region of the ends of the exhaust gas heating pipes is released. 909832/0004 - 9 - 4. Steam boiler according to one of claims 1 to 3, wherein the water space consists of a substantially cylindrical Pressure vessel (l) consists, characterized in that the exhaust gas heating pipes (2) parallel to the axis of the Run pressure vessel and are inserted with their ends in the end floors (3, 4) of the pressure vessel. 5. Steam boiler according to claim 4, characterized in that the combustion chamber (9 »10) within the pressure vessel (1) is located, and that the flue gas heating pipes (8) with | their ends are fixed in the wall of the furnace and in the jacket of the pressure vessel. 6) Steam boiler according to claim 5, characterized in that the furnace consists of an elongated, substantially cylindrical combustion chamber (9 »10), which is located on the lower end base (3) of the pressure vessel (l) eccentrically mounted near the shell of the pressure vessel, with the longitudinal axis of the combustion chamber parallel runs with the axis of the pressure vessel, and that the flue gas heating pipes (8) in the axis of the Container facing wall of the combustion chamber and in the opposite of the combustion chamber Part of the jacket of the pressure vessel or are fastened in a heating tube sheet connected to the jacket. 909832/0004 " ¹⁰ " -ΙΟΥ. Steam boiler according to claim 6, characterized in that that the part (10) of the combustion chamber to which the flue gas heating pipes (8) are connected, an im has a substantially semicircular cross-section and that one end of the flue gas heating tubes in the axis of the pressure vessel facing, flat wall of the combustion chamber is attached. 8. Steam boiler according to claim 6 or 7, characterized in that that the pressure vessel has a steam dome (15) on the upper end base (4) of the pressure vessel above the combustion chamber (9 »10) is attached. 909832/0004 Blank page