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    • 34. 发明专利
    • Improvements in Apparatus for Consuming Smoke and Promoting Combustion in the Furnaces of Steam Boilers.
    • GB190518550A
    • 1906-09-14
    • GB190518550D
    • 1905-09-14
    • SCOTT ALEXANDER ARCHIBALDWRIGHT ROBERT
    • SCOTT ALEXANDER ARCHIBALDWRIGHT ROBERT
    • 18.550. Scott, A. A., and Wright, R. Sept. 14. Smoke-consuming. -Hot air is supplied at the back of the fire-bridge of a steam-boiler furnace to promote combustion and consume smoke. The supply of air to a distributing-box at the back of the fire-bridge is controlled by a damper at the end of an air-supply pipe passing through the ash-pit. The damper is operated to admit air when the fire-door is opened and is closed automatically a short time after the fire-door is closed, the interval being determined by tumbler mechanism. The air is discharged under a grating which becomes red-hot and heats the air passing through it. The air box g preferably consists of two plates h, h , Fig. 6, with flanges h , h and air inlets and outlets arranged as shown. Air entering at an opening f in the bridge f is discharged through semicircular openings m between the ends of the grate bars m, which are shaped as shown. Air supplied through the pipe j is discharged below these grate bars. The damper k, controlling the supply of air, is closed by gravity and opened by the action of a projection y', carried by the fire-door, on a lever o connected to the damper as shown. The valve is held open by a catch lever n , Fig. 4, engaging the lever o. A short time after the furnace door is closed, this catch lever is operated to release the damper by pins y , y on a tumbler y . As the door is being closed, this tumbler is partly rotated by the action on a ratchet disk n of a pawl r, carried by a lever y passing through a circular slot l in the plate l and connected to the furnace door by a link y'. The half-rotation of the tumbler is completed after the desired interval by the weight of liquid &c. passing through one of the tubes p , Fig. 9, into the lower chamber p . According to the Provisional Specification, the damper controlling the air supply is connected by a chain &c. to a slide working in a guide-bracket at the front of the boiler behind the fire-door, to which the slide is connected by a hinged piece. An " automatic guiding " spring or other catch holds the chain when in the "up" position and can be released by the fireman or automatically by a tumbler. This tumbler is pivoted at its centre and is turned, each time the door is opened, by a chain and a chain-wheel and acts on a spring or other lever which acts on the chain catch. The tumbler has two chambers connected by a narrow passage, and contains heavy material such as mercury, iron filings, and pellets.