Specification of Francis Parry : drying precipitated sewage, &c.

  • Parry, Francis.
Date:
1872
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Francis Parry : drying precipitated sewage, &c. Source: Wellcome Collection.

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    2 A.D. 1871.—N° 2481. Provisional Specification. Parry’s Impts. in Apparatus for Prying Precipitated Sewage, 8fC. to prevent any escape of effluvium or loss of the hot air or steam employed in drying the mud. When using a receptacle of very extended area the plates or covers may he subdivided, and each be attached to a chain and counterweight so as to enable any one or more to be readily elevated and lowered 5 again. With a view to prevent loss of heat by radiation these flat plates or covers should be coated with any well known good non-conducting material. The mud to be dried is run in a thin layer over the floor of the receptacle, which may or may not he subdivided into compartments, and 10 provided with footways for the workmen along the middle and sides; and the plates or covers having been lowered into their places a rapid current of hot air or dried steam, produced either by a fan or other forcing or extracting apparatus or by the mere draught of a long flue and chimney, is caused to traverse a space or chamber underneath the 15 floor of the receptacle and thence to pass along the surface of the mud, that is to say, between the mud and the flat cover plates, and finally to pass off to the chimney. Or the hot air or steam may first pass along the surface of the mud and then traverse the space beneath the floor, or the current of hot air or steam may pass directly along the top and 20 bottom of the receptacle at the same time in lieu of passing from one to the other; or the hot air or steam may be alternately applied to the top and bottom of the receptacle. When using hot air I propose in some cases to employ a gas regenera- ® • 2i D tive furnace of any well known construction. LONDON: Printed by George Edward Eyre and William Spottiswoode, Printers to the Queen’s mo9t Excellent Majesty. 18 12.