DE306593C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

_'- M 306593 CLASS 13 «. GROUP

The invention relates to a multi-pressure tube boiler with upper and lower boilers and middle grate between the lower boilers for ship operation. Opposite to similar known boiler systems differs from the multi-pressure tube boiler Invention in that the high pressure boiler and the medium pressure boiler share a lower boiler, or have common upper kettles, or common upper and lower kettles. This arrangement of common upper and lower boilers for two, different boiler pressure levels, the separation of these pressure stages in the common upper boiler or common lower boiler, if necessary the installation of a partition or by forming the upper or lower boiler is brought about from a full and a partial round boiler, the circulation in the

ao different stages of liquid to be evaporated according to the temperature differences; promoted in the separate chambers of the common boiler part, thereby approximately one uniform heating of the liquid in the chambers, a lively vapor formation, Avoiding quiet rooms and making it more difficult for boiler salts to build up achieved. A Another advantage of the merging of common upper and lower boilers there is similar known boiler systems, in a compact, lightweight design moderate space requirements in a simple heating gas guide with few reversals and lighter Accessibility and the possibility of widening the grate surface through the Gaining space through the merger. The partition in the common Oberbzw. Lower boiler can be arranged so that it can be pulled out and bent so that the overpressure in the High pressure boiler part against the pressure in the medium pressure boiler part against the partition wall presses the circumference of the round kettle.

In Fig. Ι to 4 are different embodiments of the new multi-pressure tube boiler shown in height cross-section.

The high pressure boiler 1, 2 and the medium pressure boiler 3, 4 (Fig. Ι to 4) have example, wise common lower kettle. The curved, possibly extendable partition 5 separates the lower boiler into space 6 belonging to the high pressure boiler and the, Room 7 belonging to the low pressure boiler.

According to Fig. 1, the common lower boiler with a high pressure and a medium pressure upper boiler and according to Fig. 4 with one high-pressure and two medium-pressure upper boilers connected. The heating gases flow through in the first case after leaving the high pressure water pipes a steam superheater 18, in the other case they are of, the upper boilers 2, 4 through a wall 8 laterally in the Distracted boiler tubes. The medium pressure upper boilers are in the embodiment according to 4 connected to one another by an overflow pipe 4 / in order to compensate for the development of steam bring about.

In order to keep the hot flue gases away from the high-pressure upper boiler, according to FIG. 2

Claims (3)

the high pressure boiler tubes are brought close to the medium pressure boiler tubes, thus forming a closed wall through which the bypassing of the heating gases down into the water tube rows of the next boiler compartment is made possible at the same time. The design of a common upper boiler for the high pressure boiler and the low pressure boiler is according to, Fig. 3 designed so that the part 2 belonging to the high pressure boiler is a full round boiler, while the part 4 belonging to the medium pressure boiler, as a partial round boiler, is attached to the high pressure upper boiler like a hood. The ends of the hood are connected to one another by cross stiffeners. As usual, the low-pressure boilers are arranged on both sides in the outer part of the combustion chamber. According to FIG. 4, each of these boilers consists of a lower boiler 9 with tubes 10 leading to an upper boiler 11 Low pressure boiler 14,15,16 lower part! A preheater 17 is switched on between the preheater and the low-pressure boiler. The increased circulation of the water to be evaporated in the individual boiler pressure stages is effected as follows in the multi-pressure tube boiler according to the invention. The water falling in the outer part of the high-pressure tube bundle 1 sweeps past the partition 5 in space 6 and rises again to the upper boiler 2, heating up at the furnace. The heat given off to the intermediate wall 5 migrates to the liquid of the medium-pressure boiler located in the back of the wall 6 in space 7, which is caused to rise while the cooler water lying behind it sinks. , For those downstream of the high pressure boiler. The water circulation promoted in this way means that downpipes can be dispensed with. The circulation of the water through the tube bundle is shown by the arrows drawn in. - Patents τ claims: 1. Multi-pressure tube boiler with upper and lower boilers and a middle one, between the Lower boiler grate for ship operation, characterized in that the High pressure boiler and the medium pressure boiler common sub-boiler, or common Upper boiler, or have common upper and lower boiler. 2. Multi-pressure tube boiler according to claim i, characterized in that the the high pressure boiler and the medium pressure boiler common upper boiler or ■ lower boiler on a round boiler, the is separated by a curved, possibly removable partition (5), or consists of a full and a partial round boiler. 3. Multi-pressure tube boiler according to claim ι and 2, characterized in that that the medium pressure boiler has two, arranged on both sides of the upper boiler of the high pressure boiler, has an equalizing connection with each other upper boiler (Fig. 4). 1 sheet of drawings.