US 908882 A
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SUPERHEATEB. BOILER. APPLIUATIU K nun APB..B,1905.
908 882 v Patented Jan. 5, 1909 19% [Menace 3704 C'. Flu uc n ('0:
444, )l-U u K. 952 M CHuznug M UNITED ST.-\,TES
Specification of Letters Patent.
Patented Jan. 5, 1909.
Application filed April 8. 1905. Serial No. 254,435.
To all whom it may concern:
Be it known that 1, JOHN C. PARKER, a citizen of the United States, residing: at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain Improvements in Supe1heater-Boilers, of which the following is a specification.
This invention is a super-heater boiler designed to generate and superheit steam so as to attain the maximumellicicn y. To this end it comprises a ni'uepriniing generator in combination with a superheater cilecting; a high. rate oi flow and subject to a high temperature, the rate of flow and heating: muintaining a delinite relation and being con trolled by the distribution and regulation of the heating gases.
The presence of a very small amount of moisture in the steam delivered by the generator is sufficient to destroy the etliciency of the superheater and render it a mere supplementary cva orator performing; no function beyond comp eting the work left unfinished by the generator, and therefore the design of the generator contemplates the evaporation of practically the total moisture from the stcam prior to its delivery to the supcrhcater, which conduces to uniformity and clhciency 1n the superheating effects.
A further desideratuni is effected in the i prises the water compartment 2 and the steam )roduction of a. flow through the superhcater bearing a definite relation to the lZGlYll'Jil'fltUl'f to which the heating surface is subjected, by iroportioning the sectional area of the supcrheater so as to secure. a large difference in )rcssure on either side thereof, preferably lroni three to ten iounds difference. This results in a very high rate of flow through the supcrheater when the generator is running u to full rating, and at such times the How oi the gases on the outside of the superheating surface is correspondingly rapid in order to generate the required mnount of steam. 'lhcrefore the flow oi the gases and the steam tend to increase or decrease together, in. a. more or less deiunte proportion to each j The superhcater is located in practically the hottest zone of the heating gases, in order that there may be obtained higher power and quicker response to varying demand for steam or the maintenance of the closest practical relation between the rates of llow ol the steam and gases. The genera tor is especially designed for this purpose, l and for practically supporting the parts of the supcrheater, means being provided for distributing and regulating the llow of the heating gases to effect uniformity in the action of the supcrhcatcr.
The nature and characteristic features of the invention will more fully appear by reference to the following description and the accompanying drawings, of which z-- Figure 1 represents a vertical longitudinal sectional View of a form of the apparatus; Fig. 2 represents an end elevation thereof,
arts being broken away for the purpose of illustration; Fi 3 represents an end elevation of a modilicd constructionv arts being broken away for the purpose of ilustration; Fig. 4 represents a transverse vertical sectional view and Fi 5 represents a plan View of mechanism for distributing and regulating the llow of the gases in relation to the superheating tubes.
As shown in the drawings, the drum 1 comcompartment 3, the compartments being connected by the ports 4 and 5 controlled by the corresponding valves 6 an d 7 The watcrcompartment communicates by the tubes 8, havmg the non reverse valve J at the outlet therel'rom,with the continuous superposed teed watcr coils 10, extending transversely and downwardly, which discharge by Way of the lower coil and the uptake ll into the steam compartment, a non return valve 12 in the steam compartment preventing (low of steam from the steam compartment through the blow off 12 when the latter open. A ipe 13, connected with the upper coil bcyom t is non return valve 9, supplies the feed water, which is forced through the feed coils and delivered to the steam compartment 3 whence it passes into the water compartment 2. The water compartment communicates by down take tubes 14 with junction boxes 15 which discharge into the eve orating coils 16 having the non return va-Vc 1 17 at the head thereof, the coils being orranged in tour parallel sets, extending transvcrsely and downwardly, which discharge by transversely in parallelsets discharging by the respective up take tubes 22 into the steam compartment.
The lower and upper sets of evaporating tubes are separated by a space within which is located the headers 23 and 24 and the bent superheating tubes 25 connecting them. A down take tube 26 connects the steam compartmcnt of the drum with the header 23 which dischar 'es by the bent tubes 25 into the header 24 discharging by the uptake tube 27 into the steam main, the caliber and number of the super-heating tubes being such that the steam is throttled in its passage therethrough with a consequent increase in velocity for the purpose specified.
The tubes 20 of the lower sets of eva orating coils support the bafiie 28 having t 1erein small holes 29 disposed to distribute the gases evolved from the fuel burning upon the grates 30. The holes 29 are arranged in pairs, each pair being controlled by a brick 31 fixed to a rod 32 for shifting it and V8. in the size of the holes. By means of t e ho es, the heating gases may be uniformly distributed, while the degree of superheat may be regulated by varying the size of the o enings, thus maintaining the distribution w ile varying the volume of the gases impinging upon the su erheating tubes. The gases passing the be e 28 throu 'hthe holes .29 and opening :39 are carried along the tubes 16 and 10 by the battle disposed between them. The grates 30, separated by the bridge wall 34, are char ed from each end of the boiler through the lire doors 35.
As shown in Figs. 2 and 3, the transversely extendin feed water tubes may employ van ous num )ers of coils, bell] in Fig. 2 and three coils big 1 in Fig. 3. T is sets of evaporating tubes mayalso be varied, being five coils high in Fig. 2 and six coils high in Fig. 3. And the lower sets of evaporatingltubes may also be varied, being two coils gh in Fig. 2 and using a single row of tubes in Fig. 3. These variations in the ar rangement of tubes will be made to suit var ing conditions it being preferable as a rul to use a single row of evaporating tubes below.
There is thus provided, as means for effecting the desired results, steam and water compartments, feed water elements connected with the steam and water compartments and placed directly beneath them in the lower temperature zones of the furnace, evaporating elements having independent connections with the steam and water comfour coils hi h' oos,sa2
partments and located beneath the feed water elements in the intermediate temperature zones of the furnace, superheating elements having an independent connection with the steam com artment and located beneath the first set 0 evaporating elements in substantially the highest temperature zone of the furnace, and evaporating eleinents having independent connections with the steam and water compartments and 10'- cated beneath the superheating coils, in position to en port them and the means for regulating tl ie distribution of gas in contact therewith.
By these meansthe feed water is heated and delivered at a uniform temperature to the water compartment, the several sotsof coils for evaporating water into steam are disposed and proportioned asrequired for effecting the flow that has the desired relation to the temperature in the zones in which they are severally located, and the superheating surfaces are subject to a regulated distribution of approximately the highest heat of the furnace.
Having described my invention, I claim 1. A superheater boiler comprising steam and water containing a paratus, an evaporating coil beneath sai apparatus, superheating tubes beneath said evaporating coil in approximately the hottest art of the furnace, and an evaporating co beneath said superheating tubes, said evaporatin coils having independent connections wit said steam and water containing apparatus.
2. A superheater boiler comprising steam and water compartments, a feed water coil beneath said com artments, an evaporating coil beneath said eedwater coil, and superheating tubes beneath said evaporating coil in approximately the hottest part of the furnace, said coils and tubes having independent connections with said steam compartment.
3. A superheater boiler comprising a drum having separate steam and water compartments, continuous evaporating coilsnhaving connections with said steam and water compartments, superheating tubes beneath said evaporating coils, said superheating tubes being connected to said steam compartment, and mechanism for distributing gaseous products of combustion in relation to said superheating tubes and passin it upwardly thelrefrom in contact with said evaporating 320 C01 S.
4. A superheater boiler comprising a drum having separate steam and water compartments, a set of eva orating' coils connected with said steam an water com artments, a second setof eva orating coils eneath said first named set 0 evaporating coils and connected with said steam and water compartments and a superheater having headers and tubes located between said sets of evaporating coils, said superheater being connected with said steam compartnmnt andlucated in approximately the hottest part of the fur- 5. A supcrheater boiler comprising steam and water compartments, a set. of evaporating coils connected with said steam and water compartments, a second set of evaporating coils beneath said first named set of evaporating coils and connected with said sic-on and water compartnicnts, a superheater between said evaporatingcoils, and a battle supported by said lower set of evaporatine coils and having apertures therethrough for distributing and directing the gaseous products of combustion in relation to said super-- heater.
6. A superheater boiler comprising steam and water containing, ap )aratus, a set of eva orating coils beneath and connected wit 1 said ap )aratus, a set of superheating tubes beneath said set of evaporating, coils and connected with said apparatus, a second set of eva orating coils beneath said superheating tu es and connected with said apparatus, a perforated battle supported by said lower set of tubes, and dampers for regulating the How of gases through said perforations.
nace, in oombinwtion with a plurality of sets of evaporating coils, a superheater having tubes located beneath said sets of ova iorating coils, an evaporating coil beneath said super-heater, the upper evaporating coils occupying a lower temperature re ion of said furnace than the lower coils and the course through each of said sets of upper coils being longer than the course through said lower coil and separate steam and water compartments with earh of which the respective coils are ('nlllltK'lttl.
8. A superheater boiler comprising a furnace, in combination with steam and water containing apparatus, feed water coils be-- ncath said apparatus and connected thereto, a lurality' of parallel sets of evaporating coi s beneath said feed water coils and directly connected to said apparatus, and a superheater beneath said'evaporating coils and directly connected to said apparatus.
In testimony whereof I have iereunto set my hand this 4th day of April, 1905, in the 7. A superheatcr boiler comprising a iurpresence of the subscribing witnesses.
' JOHN (J. PARKER. Witnesses:
Rom-m1" Janus EARLEY, U'rnm' E. CRANE, Jr.