Patent GB-191317515-A (GB)
Title: Improvements in Furnaces for Heating Steam Boilers by Means of Combustible Gases or Vapors.
Inventor: COUSIN PAUL
IPC: F23C99/00
Filed: 1913-07-30
Granted: 1914-05-28
Abstract: 17,515. Cousin, P. Aug. 3, 1912, [Convention date]. Liquid and gaseous fuel furnaces; cleaning.- In a vapour or gaseous fuel furnace for steamgenerators &c., the air is heated by being burned in a chamber with a small portion of the fuel, and is conducted to a combustion chamber for combustion with the remainder of the fuel. Fig. 1 shows a cross-section, and Figs. 2 and 6 longitudinal sections on the lines k-l and r-s respectively of one form of furnace for carrying out the invention. Gas passes from a main 6 through a valve 16 to a flue 7. and vertically through orifices 10 to one end of the air-heating chamber 1, and cold or hot air is drawn into the chamber 1 through orifices 11 in the front wall. Combustion takes place within the chamber 1 and the products with the excess of air pass by lateral flues at the back of the chamber 1 to collectors 2 at the sides and rear of the furnace. The gas supply to the combustion chamber 4 passes from the main through valves 17 to passages 3 extending along the sides and at the back of the furnace. Uptakes 13 conduct the gas to orifices 14 at the sides and back of the combustion chamber, where it is met bv the air passing through corresponding orifices 15 from the collectors 2. The flames pass from the combustion chamber under an arch 19 protecting the boilers 8 from direct contact with them. Within the chambers 1 and 4, pillars, baffles, &c. 9 are arranged to facilitate combustion. In modifications, the air ard gas inlets to the chamber 4 are arranged either at the sides alone or at the rear alone. In the modification shown in Figs. 25 and 28, the air and gas inlets to the chamber 4 are arranged along the bottom of the chamber in rows perpendicular to the front. The air collector 2 is at the back of the furnace only, and delivers to passages 20 under the chamber 4 whence the air passes to the chamber 4 by outlets 15. The gas passage 3 delivers to passages 21 alternating with the passages 20, whence the gas ascends through outlets 13 to the chamber 4. In a further modification, the inlets to the chamber 4 are arranged in rows parallel to the front of the furnace, passages corresponding to the passages 20, 21 running beneath them. As shown in Fig. 25, two air passages are provided for each gas passage. If desired. one air passage only may be provided for each gas passage, as shown in Fig. 1. The air and gas passages may be parallel or inclined to one another at any angle. Dampers may be provided to regulate the supplies to the burners. As shown in Fig. 1, dampers 18 pass through the side wall of the furnace and are pushed into the orifices 15 to regulate the air supply. In Fig. 28 the gas supply is shown regulated by sliding dampers 22 which may be operated from the furnace front. The gas passages may be cleaned by blowing air through them, or where possible by lowering a plug through them. For cleaning a row of passages, a plug 29, Fig. 40, may be suspended on a cord 28 passing over a pulley 26 carried by a trestle 27. The trestle may be passed through an observation hole at the end of the row and be graduated to indicate when it is in the correct position for lowering the plug into the various passages.