Patent GB-190222260-A (GB)
Title: Improvements in Steam Generators
Inventor: GRENTHE LOUIS
Filed: 1902-10-13
Granted: 1903-10-13
Abstract: 22,260. Grenthe, L. Oct. 13. Sectional and water-tube boilers; Cornish &c. boilers; ; locomotive-type boilers; water-circulation, promoting.-Relates to means for promoting watercirculation in boilers of various types, including sectional and water-tube, internally-flued, and locomotive boilers. The accompanying Figures show the principal forms of boilers to which the invention is applied. In Fig. 1, which shows a boiler comprising an upper steam and water drum a connected with a lower drum b by vertical tubes d, fitted with inner circulating-tubes e, and also by large circulating-pipes c, f, the upper drum is fitted with a trough-shaped partition g, open at the ends, and transverse partitions h, i, forming between them two separate compartments j, k communicating with the steam space m. A portion of the water in the lower drum circulates upwards through the front pipe c, passes along the trough g, and returns to the lower drum through the back circulating-pipe f. The remainder of the water rises through the tubes d to the space k under the trough g, and returns to the lower drum through the internal circulating-tubes e. In both cases, the steam generated escapes upwards into the upper part of the drum a. In Fig. 5, the trough g is closed at the ends and provided with open pendent tubes e, which descend through the tubes d to the drum b. Other tubes e' descend into tubes d<1> depending from the bottom of the drum a and havine closed ends. From the front of the lower drum, the water rises in the pipe c to the trough g, and descends again through the tubes e. It then rises through the tubes d to the lower part of the drum a, and finally passes into the downtake f at the back end of the boiler. The flame &c. is caused to pass in a sinuous course by arranging a horizontal brickwork partition between each side wall of the furnace and the group of tubes and placing two vertical baffles o', o<3> between the tubes. The front baffle o<2> extends upwards from the firebridge, and has the same width as the furnace except at the part above the horizontal partition. The rear baffle o<3> is of the same width as the furnace throughout its entire height. Fig. 8 shows a boiler comprising three drums b, p, a disposed one above the other, and connected by circulating-pipes, as shown. The water from the bottom drum b ascends through the pipes c into the trough g in the top drum a, and then descends through the pipes e into the middle drum p. It then rises into the lower part of drum a, and finally returns to the bottom drum through the pipes f. In the arrangements shown in Fig. 9, the water ascends through a central row of tubes c to the trough g, and descends through a pipe e into a T-shaped collector q, after which it passes through the inclined tubes d<2> to the bottom part of the drum a. Finally, it descends through a pipe f and passes through a horizontal pipe b<1> to the water drum b. The invention is equally applicable to Temple, Normand, and other boilers of a similar kind. In the arrangements shown in Fig. 12, the water from the central drum b passes through front uptake pipes c to the trough g in the upper drum a, and then enters the downtakes e leading to the side drums y. It then ascends through the generating-tubes d to the bottom of the upper drum a, and finally returns to the drum b through down takes at the back. Fig. 14 shows the application to a boiler of the Babcock & Willcox type. The inclined generating-tubes are arranged in two groups b<4>, p<3>, and connected with separate headers at the front and back. Circulating-pipes c, f connect the front and back lower headers b<2>, b<3> with the trough g and drum a, respectively, while other tubes d, e make similar connection for the headers p<1>,p<2>. In a modification of this arrangement, the headers b<2>, p<1> at the front, t, and also those at the back, are made in one and separated by an internal partition. Fig. 17 shows the application of the invention to a boiler, the upper drum of which is fitted with smoke-tubes. Two vertical partitions are placed longitudinally in the drum a, and separated from each other by vertical transverse partitions h, i of different heights, in such a manner as to form three compartments j', k<1>, j<2>. In addition, apertures s' are formed in the lower part of the longitudinal partitions between hand i. The circulation of the water is shown by the arrows. In applying the invention to a Lancashire boiler, Fig. 20, two partitions h, i, one terminating above and the other below the water level, are placed between the boiler shell a and the internal flues t, and are connected by a trough-shaped partition g open at the front and closed at the back. A number of tubes e depend from the trough g, and a tube u extends between the lower ends of the partitions h, i. The water circulates upwards in front of the partition h, passes into the trough g, and descends through the tubes e. It then rises in the space between the partitions h, i, passes over the edge of the partition i, and descends to the tube u, which leads it to the front of the boiler. When applied to a Galloway boiler, the pendent tubes l descend through the cross water-tubes in the flues. Fig. 27 shows the application to a boiler of the locomotive type. The boiler is fitted with an upper steam and water drum a containing a trough-shaped partition g closed at the ends. Into the bottom of this trough open large circulating-pipes c, e, the former of which are arranged above the firebox while the latter descend between the two groups of fire-tubes w. In addition, large circulating-pipes f connect the drum a with the water space at the sides of the firebox. The arrows show the direction in which the water circulates.