Suction gas plants . Fio. 81.—Ariangement of Producer Plant in which Rotary Grate is used. The Fielding Plant.—The special features of the Fielding producer are the vaporiser, air supply, and grate. A belt E(fig. 32) is formed in the sides of the hopper casting, throughwhich the air supply is drawn. As the hot gases pass round this 104 SUCTION GAS PLANTS. belt they impart some of their heat to the incoming air, whichthus receives a preliminary heating. The air then passes downthe vertical pipe C, to the centre of a rotatable table whichsupports the grate. The latter is simply a circular plate
Suction gas plants . Fio. 81.—Ariangement of Producer Plant in which Rotary Grate is used. The Fielding Plant.—The special features of the Fielding producer are the vaporiser, air supply, and grate. A belt E(fig. 32) is formed in the sides of the hopper casting, throughwhich the air supply is drawn. As the hot gases pass round this 104 SUCTION GAS PLANTS. belt they impart some of their heat to the incoming air, whichthus receives a preliminary heating. The air then passes downthe vertical pipe C, to the centre of a rotatable table whichsupports the grate. The latter is simply a circular plate withribs on its lower side, which support it on the table, and to whichit is secured in such a fashion that the two rotate together. WaterHegulator. Fig. 32.—A Generator fitted with a Rotary Grate. The air, introduced at the centre, passes outwards between theribs to the edge of the grate, from which it passes upwards to thefuel. This method of distributing the blast seems to be on theright lines, as it ensures a regular distribution of air through thewhole area of the producer, and does not allow the whole of theblast to take a short cut through one part of the fuel. Thesteam carried with it is superheated in its passage between thegrate and the table. APPMCATIONS AND USES OF THE SUCTION PLANT. 105 The water is introduced into the air pipe C by means of adrip nozzle K, from which it falls as a series of drops. A wastepipe is provided immediately below the nozzle, and through thisthe whole of the water supply passes if the velocity of the airdoes not exceed a certain value. If the engine is working, ateach stroke the rush of air through the pipe C carries along withit some of the water from the drip nozzle, the amount thussuppli
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