Compressed Air Plant for Mines; The Production, Transmission and Use of Compressed Air, with Special Reference to Mine Service (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 Excerpt: ...Compressing Co., of Montreal, erected a plant embodying the system for the Dominion Cotton Mills, Magog, Province of Quebec.f This plant has long been in successful operation, and where the conditions permit its introduction the system may be advantageously employed for mining service also. For the Magog Mills a 128-ft. shaft was sunk to give the desired head and pressure (Fig. 85). In it was erected a large vertical compressing pipe, a, 3 ft. 8 in. diameter, the lower part gradually increasing to 4 ft. 8 in., and made of Tv"1-steel plate. This pipe passes through the bottom of an iron receiving chamber, b, at the surface, to which water is conducted from a dam or reservoir. The chamber, b, is 12 ft. diameter by 12 ft. high. Water flows into and fills the pipe, which extends nearly to the For a record of these tests see Proceedings 0f the Institution oj Civil Engineers, London, Vol. LXIII, p. 347. f The following description is based on an article in the Canadian Engineer, March, 1897, and information furnished to the author by the builders. See also Eng. and Mining Jour., Dec. 26th, 1896, p. 606, and Railway and Engineering Review, Sept. 17th, 1898, p. 513. bottom of the shaft. By means of an arrangement of small feed pipes described below, air is drawn with the water into the top of the main vertical pipe and is compressed while being carried down the shaft. The compressed air collects in a separating Fig. 86. chamber, c, at the bottom of the shaft, while the water is returned up the shaft to a tailrace near the top. The difference of water level between intake and tailrace is about 22 ft., which produces the requisite speed of flow of the mass of water. Into the top of the vertical pipe, a, is inserted a telescoping section of pipe, d, to the ...