US1832029A - Steam boiler - Google Patents

Description

J. KEM NAL STEAM BOILER Nov. 17, 1931.

4 Sheets-Sheet 1" 7 Filed March 20, 1925 "h ATTORNEYS.

J. KEMNAL Nov. 17, 1931.

STEAM BOILER Filed March 20, 1925 4 Sheets-Sheet 2 INVENTOR W M ATTORNEYS.

J. KEMNAL STEAM BOIILER Nov. 17, 1931.

Filed March 20, 1925' 4 Sheets-Sheet 3 00000o000c1'oo0000 INVENTOR Wm W4 A'TTOFQN 90000000000000 )OOOOOOOOOOOOOOOOOOOOOGOOOOO Nov. 17, 1931. J KEMNAL 1,832,029

STEAM BOILER Filed March 20, 1925 '4 Sheets-Sheet 4 {M ATTORNEYS Kimmie Wei ewe Lei; WEDGE, ENGLAND, TU? LBAJECGCK d2 W'ILGCJX SGM- FAQ? ,1, {33F BAYQINEIE HEW GQIELIFPUHATEON 01E LEEBBIJY filee filfiereii 20, 19% Ho 1%,8231, em? in Great Britain. July wee rig ehhese which have provision 1 i? s'iieem from between nes and the izke, and

A di'evaqngs in Li-mi eievetlon when, such seeeieveeien of v v CW5.

ueii i have adopted; for purfurnace chamber 11) 1s A" "tubes 14, the be i 1 entire setting f0 ShQW-Hi best A "ending eniy v e mg, eiso as shown. best mph s hemiheeciers l6 which sum, he dowuizeke headers 1'5 18 of the upper ioenk l i take headers 1'? are nippieei t0 the Water drum. 1.9 in the usual mare simulating tubes 20 eemieei; the T "eeieis 18 with the drum 19. A. pipe ieeim from the drum 1% to the intake 7 e-if eke superheei'ei' 13, the steam ieeviug the euiziell; heeoier 23 through the pipe 24: fie the point of use. Above the boiler e gas flue 25 extending across the b0iler, such iiue dieeceimg the horizontally iueo 'ehe zippei" end of e We flue QKi-Which leads to the lower ends of the tubes 27 of e combustion eii" heater leeeted the rear of me ieeiiei the eombuetieu e5 to iseheeieei e are connected to "iiOWBi 7101 u.

iuieipipe and leaving shrough "ciie eueiet was 37.

i Q bo 'h dampers 33 eir iowermost pesitien then M 1 1 the furnace rise 'verriiceiiy, ever the low l2 1 i-ier 13 end. then. ovmiie esition'ng the dampee 33 e 1' ii; sous time the distribution oi tween the reheeter 35 euci the u es J; be drawn to its closed pee gases will flow across the upp ee'iz efiieetiiig the reheeter. damper 33 is drawn t0 its (:10 the damper 34; "fully open s wiii pass over the reheeter 35 er pass over the upper bank li. The d M; 33 and 3 1- may be set to any ciesiredi PGSi'e'Li-Qfi to regulate the degree of i'eheetin in the reheeter fiSvdS1f6d the. remewiieg flowing over the upper Tee. M.

Regardless of the setfiiug of ihedemners 33 and 3%, all oi? the gases will pass evei- Lilia superheetei' 13 and While they be (iivercted in pert from one side of the supeirheete1" to the other, the amount of superhee; obmined. from-thev superheater 13 will not be materially varied thereby; Ali ef the) gases will alsoflow over the air heater regardless we of the setting of the dampers 33 and 34, so that any waste heat will be returned to the system through the combustion air. The por tion of the furnace chamber containing the lower bank of tubes 12 and the superheater 13 provides a single pass for the furnace gases, which termlnates in two passes disposed in parallel and which in turn communimerely illustrative and the embodiment of my invention may be widely varied.

This application is related to my copending application Serial No. 705,211, but it is to be understood that I do not intend to claim herein any of the subject matter defined in the claims of said copending application, and the claims herein should be construed according'ly.

I claim:

L A steam boiler having horizontally inclined water tubes, said tubes being divided into a lower bank extending across the boiler for the full width thereof, a superheater in the lower bank, an upper bank at one side of the setting, a reheater above the lower bank and alongside the upper bank, a vertical dividing wall between the upper bank and the reheater and extending to the gas outlet of the boiler, a damper at the boiler gas outlet for the passage containing the reheater, and a damper at the boiler gas outlet for the passage containing the upper bank.

2. A steam boiler having horizontally inclined water tubes, said tubes being divided into a lower bank extending across the boiler for the full width thereof and an upper bank at one side of the setting, a reheater above the lower bank and alongside the upper bank, a vertical dividing wall between the upper bank and the reheater and extending to the as outlet of the boiler, a damper at the oiler gas outlet for the passage containing the reheater, a damper at the boiler gas outlet for the passage containing the upper bank, and an air heater arranged to receive the gases from both of said passages and ducts to lead heated air from the air heater to the boiler combustion chamber.

3. A steam boiler having horizontally inclined water tubes, uptake and downtake headers for the water tubes, a steam and water drum, connections between the headers and the drum, a gas exit flue having its entrance above the connections between the up take headers and the drum, said water tubes being divided into a lower bank extending 1,ssa,oae

across the boiler for the full width thereof and an upper bank at one side of the setting, a superheater in the lower bank, a reheater above the lower bank and alongside the upper bank, a vertical dividing wall between the upper bank and the reheater and extending up to and into the gas exit flue, whereby the furnace gases will flow in a continuously generally upward direction over the lower bank and then into the passages formed by the vertical wall, and a damper for each passage at the upper end of the vertical wall, whereby the quantity of gases flowing through the respective passages may be regulated.

4. A steam boiler having horizontally inclined water tubes, uptake and downtake headers for the water tubes, a steam and water drum, connections between the headers and the drum, a gas exit line having its entrance above the connections between the uptake headers and the drum, said water tubes being divided into a lower bank extending across the boiler for the full width thereof and an upper bank at one side of thesetting, a reheater above the lower bank and alon side the upper ban k, a vertical dividing wa l betwmn the upper bank and the reheater and extending up to and into the gas exit flue, whereby the furnace gases will flow in a continuously generally upward direction over the lower bankandthen into the passages formed by the vertical wall, a damper for each passage at the upper end of the vertical wall, whereby the quantity of gases flowing through the respective passages may be regulated, an air heater to receive all the gases irrespective of the positions of the damper, and ducts to lead heated air from the air heater to the boiler combustion chamber.

5. A steam boiler having horizontally inclined water tubes, said tubes being divided into a lower bank extending across the boiler for the full width thereof and an upper bank at one side of the setting, a reheater above the lower bank and alongside the upper bank,

a vertical dividing wall between the upper 7 bank and the reheater and extending to the gas outlet of the boiler, a superheater at a lower level than the bottom of said wall, a damper at the boiler gas outlet for the passage containing the reheater, and a damper at the boiler gas outlet for the passage containing the upper bank.

6. In a steam boiler, spaced banks of boiler tubes, a primary superheater interposed between said banks, a re-heater above said banks, means for passing the gases over said primary superheater and said re-heater, means for increasing or decreasin the temperature of said re-heater without affecting the temperature of said superheater, and means for causing the gases to engage all of the superheater tubes across the boiler under every condition of operation.

7. In a steam roller, spaced banks of boiler tubes, a primary superheater interposed between said banks, a re-heater above said banks, means for passing the gases over said primary superheater and said re-heater, means for increasing or decreasing the heat applied to said Ive-heater without varying the heat applied to said superheater, and means for causing the gases to engage all of the superheater tubes across the boiler under every condition of operation.

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