TAILIEUCHUNG - The Encyclop Dia Britannic 3

DESTRUCTOR (continued from volume 8 slice 2 page 108.) . in main flues, &c. (g) The chimney draught must be assisted with forced draught from fans or steam jet to a pressure of 1½ in. to 2 in. under grates by water-gauge. (h) Where a destructor is required to work without risk of nuisance to the neighbouring inhabitants, its efficiency as a refuse destructor plant must be primarily kept in view in designing the works, steam-raising being regarded as a secondary consideration. Boilers should not be placed immediately over a furnace so as to present a large cooling surface,. | THE ENCYCLOPEDIA BRITANNICA A DICTIONARY OF ARTS SCIENCES LITERATURE AND GENERAL INFORMATION ELEVENTH EDITION VOLUME VIII slice III Destructor to Diameter DESTRUCTOR continuedfrom volume 8 slice 2page 108. . in main flues c. g The chimney draught must be assisted with forced draught from fans or steam jet to a pressure of 1 in. to 2 in. under grates by water-gauge. h Where a destructor is required to work without risk of nuisance to the neighbouring inhabitants its efficiency as a refuse destructor plant must be primarily kept in view in designing the works steam-raising being regarded as a secondary consideration. Boilers should not be placed immediately over a furnace so as to present a large cooling surface whereby the temperature of the gases is reduced before the organic matter has been thoroughly burned. i Where steam-power and a high fuel efficiency are desired a large percentage of CO2 should be sought in the furnaces with as little excess of air as possible and the flue gases should be utilized in heating the air-supply to the grates and the feed-water to the boilers. j Ample boiler capacity and hot-water storage feed-tanks should be included in the design where steam-power is required. As to the initial cost of the erection of refuse destructors few trustworthy data can be given. The outlay necessarily depends Cost. amongst other things upon the difficulty of preparing the site upon the nature of the foundations required the height of the chimney-shaft the length of the inclined or approach roadway and the varying prices of labour and materials in different localities. As an example may be mentioned the case of Bristol where in 1892 the total cost of constructing a 16-cell Fryer destructor was 11 418 of which 2909 was expended on foundations and 1689 on the chimney-shaft the cost of the destructor proper buildings and approach road was therefore 6820 or about 426 per cell. The cost per ton of burning refuse in destructors depends mainly upon a The price .

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