US938449A - Superheater-boiler. - Google Patents

Description

E. H. WELLS;

- SUPYERHEATER BOILER. APPLICATION FILED $EPT.11, 1907.

Patented. 0011.26, 1909.

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INVENTOH I 61 Mush, a r Q W Q.

. M am E. H.3WELLS.

SUPERHEATER BOILER.

ILED $51 111. 1007.

APPLICATION I Patented Oct. 26, 1969.

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EDWARD H. WELLS, OF MONTCLAIR, NEW JERSEY, ASSIGNOR- TO THE BABCOCK WIL- COX COMPANY, OF NEW YORK, N. Y, A CORPORATION OF NEW JERSEY.

SUPER HEATER-BOILER.

7 Specification of Letters Paton Patented Get. 26, ,909.

Application filed. September 11, 1907. Serial No. 392,298.

Superheater-Boilers, of which the following is a full, clear. and exact description, refer-.

ence' being had to the accompanying drawi11gs,f0rming part of this specification, in which Figure 1 is a vertical section showing one form ofmy improved superheater boiler; and Fig. 2 is a section on the irregular line 11-11 of Fig. 1,

My invention relates to the applying of superheaters to water tube boilers of the vertical type having transverse steam and water drums connected by banks of tubes to a transverse mud drum or drums, the gases being given serial up and down passes over the tubesby means of bal iies.

The object of my invention is to provide an improved arrangement ofthe superheater, particularly one of the U-shaped type.

Heretofore in this general design of boiler where the superheaters have been composed of a series of -U-shaped loops connected to headers placed in the side wall of the fur nace. the plane of the loops has been perpendicular to the headers. As the result of this arrangement. the tubes are apt to-sag when overheated. 'lhis'is overcome by my invention. in which the tubes are arranged in a substantially vertical plane, as hereinafter more fully described. i

Referring to the accompanying drawings, the numerals 2, 2-) and 4- designate upper transverse steam and water drums, and 5 a lower transverse mud drum, which is connected with the drums "2, 3 and t by the respective banks of inclined heating tubes 6, T and S.

9 designates a water-supply connection for the rear upper drum 2, 10 a series of steam pipes connecting the drums 2 and 3, .11 a similar series of pipes connecting the steam spaces of thov drums 3 and 4, and 12 a series of water pipes connecting the water spaces of the drums 3 and 4.

13 designates a furnace having a grate 14.

15 is an arch over the front portion of the grate. The gases are directed among the tubes of the front bank by the batlle 16, thence descending among the second bank of tubes 7 around the lower end of a battle 17, and thence upwardly through the tubes of the third bank to the stack outlet 18, a horizontal bafiie Wall 19 being provided at the rear of the tubes 6 near their upper ends.

20' designates the super-heater, which is shown as arranged between the banks of tubes 7 and 8. This superheater is shown as consistin of a series of U-shaped tubes lying side by side in vertical planes and connected at their ends to the two inclined headers 21 and 22, which are secured in the side wall of the furnace. 1 H

23 designatesthe steam connection from the steam space of the middle top drum 3. to the lower end of the header 21, and 24: is a steam takeolf connection at theupper end of the header 22.

25 is a steam gage. V

In the position shown, the superheater is adapted to give a high degree of superheat, while burning out is avoided by the extraction of heatin passing through the front bank of water tubes. By arranging the superhcater tubes in a vertical plane, their tendency to sag when overheated is entirely avoided,

This form of superheater does not interferc with the standard form of boilers of this type, and can be retulily'applied to existing boilers without any material change in the design or arrangement.

This form of supcrhcatcr may be located in any desired portion of the boiler; more than one mud drum may be used; two or w more banks of water tubes may be employed with a corresponding chan v 1n the number of upper drums; and many other changes may be made without departing from my of the inclined multiple bank type, the OOH].- bination of inclined inlet and outlet headers adapted to be supported by the Wall of the boiler setting and a plurality of substantiallysimilar U-tubes having their ends connected to said headers and adapted to extend between the banks of tubes of the boiler, each I of said U-tubes having its legs in a substanmy hand. Y Y

EDWARD H. WELLS.

Witnesses EUGENE P. T RRY, M. WINTER.

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