Publisher's Synopsis
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1884 edition. Excerpt: ... brackets, one at each end. On the shaft E a number of cast-iron collars Flf Pa, &c, are bolted, corresponding to the number of compartments in the tank. To the collars F are bolted a number of wrought-iron annular plates G, which are secured between two wrought-iron circular frame-plates Hj H2. One of these frame-plates has a circular opening I in the centre, corresponding to the opening D in the division-plates. Cocks for drawing off the tar are placed low down in each compartment, and test-cocks for the gas are placed in each compartment above their respective water levels. The action of the machine is as follows: --Clean water is run into the vessel at the opposite end to which the gas enters, and overflows (successively into all the other chambers through openings in the division-plates, the levels varying about one inch in each compartment), to the other end of the vessel, where the gas enters, and then discharges itself. In its course through the apparatus the water becomes impregnated with the impurities from the gas, and increases in strength in each compartment, any degree of intensity being obtained that circumstances may require. The gas on entering the apparatus passes in an upward direction through each of the discs, and comes into contact with the water, carried round upon the surface of the revolving plates, and the water in each revolution is constantly descending from the circumference to the centre of the revolving plates, thus continually exposing a large area of fresh wetted surface to the action of the gas, and extracting from it the ammonia and the other impurities contained in it. The following Table shows the results of the working of one of these washers, lately erected to purify 60,000 feet of gas per hour at..
