DE362364C - Heating pipe superheater, the superheater pipes of which have larger superheater surfaces on the parts facing the furnace - Google Patents

Description

Heating tube superheater, the superheater tubes of which face those of the furnace Parts have larger superheater surfaces. The subject of the invention is a Heating tube superheater, its superheater tubes on the parts facing the furnace have a larger superheater area.

The essence of this new superheater is that the superheater tubes a special end piece (pipe head) is connected upstream, which is the hottest, that is is the most effective part of the heating pipe, the end piece being made of a hollow body with the smoothest possible surface, in which the steam is helical and is brought here. So the characteristic is that the steam to be superheated at the hottest point in the heating pipe as long as possible on which the steam flow is at the same time well circulated for better heat absorption, through a hollow body is conducted with the thinest possible walls and the largest possible area and that this Hollow body is designed so smoothly on the outside that there is as little fly ash as possible can deposit it.

The ash accumulation that just turned towards the furnace Parts of the heating pipes is very large, namely exerts a strong insulating influence on the heating surface and particularly affects the effect of the previously known become, single and multiple in the heating pipe led back and forth -pipes strong, so that the required degree of superheating in these older superheaters is only with excessive material expenditure can be achieved.

Fig. I shows, for example, such an end piece (pipe head) in longitudinal section.

a is the steam supply line.

The end piece b (the pipe head) is, as the arrows indicate, back and forth back on screw paths c and d, the steam flows through it, which is then superheated in the States discharged through the superheater pipe e or in the next end piece (pipe head) is passed on to an even higher level of overheating.

The end piece can of course be assembled in various ways or are produced; Fig. i shows the end piece (the pipe head) only schematically.

Fig. 2 gives an example of how the superheater with pipe head necks is arranged in the heating pipes of a boiler, namely in this figure two superheater pipes with pipe head end pieces connected in series. In certain circumstances can also be three or more connected in series; also can have several End pieces (pipe heads) are connected in parallel.

The discharge pipe e can be in the area of the heating pipe up to the end piece (Pipe head) also lie within the supply pipe a, i.e. together with it Form a double tube (similar to a field tube), with the purpose in the present The case is, the Heizdampfrohr e against loss of heat by returning to the To protect hot gases that have already cooled down considerably.

The number and length of the end pieces (pipe heads) depend on the the respective boiler construction and the other conditions, as well as their parallel or cascading.

Claims (1)

PATENT CLAIM: Heating tube superheater whose superheater tubes are connected to the the parts facing the furnace have a larger superheater surface, characterized in that that the end piece of the superheater tube from a ri with back and forth helical There is a hollow body (pipe head) provided with steam paths, the outside as smooth as possible Surface has.