US683757A - Steam-superheater. - Google Patents

Description

Patented Oct. I, l90l. A. HERING.

STEAM SUPERHEATER.

(Agplication filed. Jan. 80, 1901 ZSheets-Sheet I.

(No Model.)

No.'683,757.- Patented Oct. I, 190i. A. HERING.

STEAM SUPERHEATER;

(Application filed Jan. 80, 1901.) (No Model.) 2 Shaets Sheet 2.

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UNITED STATES PATENT OFFICE.

AUGUST HERING, OF NUREMBERG, GERMAN-Y.

STEAM-SUPERHEATER.

SPECIFICATION forming part of Letters Patent No. 683,757, dated October 1, 1901.

Application filed January 30, 1901. SeriaI No. 45,309. (No model.

To all 2077,0717 it 'ntay concern.-

Be it known that I, AUGUST HERING, of Nuremberg, Empire of Germany, have invented a new and useful Improvement in Steam-Superheaters, (patented in Great Britain, No. 17,900, August 19, 1898,) of which the following is a specification.

This invention has reference to steam-superheaters, and relates more particularly to the type of super-heater comprising a series of pipes through which the steam to be superheated is passed, which pipes are adapted to be heated in any suitable manner, usually and conveniently by being exposed either directly or indirectly to the products of combustion and gases flowing from the furnace.

The invention consists in means for mixing with saturated steam introduced at one point in the pipes superheated steam from another portion of the pipes.

The invention consists also in the details of construction and combination of parts hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a longitudinal sectional elevation of a furnace and superheater embodying my invention. Fig. 2 is a horizontal sectional plan View of the same. Fig. 3 is an elevation of the same.

Referring to the drawings, my superheater comprises a series of superheater-pipes 1, arranged in a superheater-chamber 2, through which the gases and products of combustion froma furnace 3 flow to the flue leading to the smoke-stack. These pipes are preferably coiled or bent on themselves, back and forth, to give an extended flow of the steam, and they have their ends projected outward through the wall 4 of the superheater-chamber,where they are connected to and communicate with two vertical collectors 5 and 6, in the form of cylindrical chambers, sustained at the outside of the superheaterchamber, the collector 5 receiving the saturated steam to be superheated through a supply-pipe 7, and the superheated steam, after passing through the pipes, leaving collector 6 through its discharge end 8. In superheaters arranged in this manner, where the pipes are exposed directly to the hot products of combustion and gases, unless means are provided to prevent the pipes are injuriously affected and in many cases rapidly destroyed by the intense heat to which they are subjected. In order to avoid this objectionable action, I propose to introduce the steam to be superheated, which is usually saturated steam, simultaneously at different points in the pipes, so as to counteract the effect of the furnace heat and to obviate the liability of there being any portion of the pipes receiving only superheated steam passing th rough other portions. This is effected by dividing collector 5 by means of a partition 8 into an upper compartment 9 and a lower compartment 10, into which compartments the saturated steam is introduced simultaneously by branch pipes 11 and 12, leading from the supply-pipe '7 and communicating, respectively, with said compartments. Collector 6 is also divided by a partition 13 into an upper compartment 14 and lower compartment 15, which latter is connected with the upper compartment 9 of collector 5 by an oblique connecting-pipe 16. As a result of this construction and arrangement the saturated steam supplied by pipe 7 will flow simultaneously to both compartments of collector 5, that introduced in the lower compartment 10 passing through the lower group of superheaterpipes to the lower compartment 15 of collector 6, and becoming superheated it flows through the connecting-pipe 16 to the upper compartment 9 of collector 5, joining there the saturated steam introduced directly into it by pipe 11. The mingled superheated and saturated steam passes through the upper group of tubes to the upper compartment 14 of collector 6, whence it finds an exit through the discharge end of the collector. It is seen therefore that by this peculiar manner of introd ucing the steam there will be no portion of the pipes receiving superheated steam alone,

the lower group of pipes receiving saturated.

steam only while the upper group receives a mixture of superheated and saturated steam. This will effectively prevent the burning of the pipes and greatly lengthen the life of the same.

Having thus described my invention, what I claim is 1. In a steam-superhcater the combination with a series of superheating-pipes, of a collector connected with one end of said pipes, a partition dividing the collector into separate compartments, and means for introducing the steam to be superheated simu1tane-.

ously into said compartments.

2. In a steam-superheater the combination with a series of pipes, of means for introducing saturated steam therein 'and means for mixing the superheated steam from a portion of the pipes with saturated steam introduced at a different point.

3. In a steam-superheater the combination with two groups of superheater pipes, of means forintroducing steam to be superheated to both of said groups, and means for introducing the superheated steam from one group into the other; whereby the superheated steam from one group will be mingled with

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