THE DRAINAGE PUMPING STATION.

Globe, Volume XXIV, Issue 2447, 8 February 1882, Page 3

THE DRAINAGE PUMPING STATION.

The following is a brie/ description of the engines, &3„ connected with [the Drainage Pumping Station which has now been com pleted by Mr Parsons, the contractor under the Drainage Board. There are two set* of engines, viz, high and low pressure, each 120 h.p. (indicated), compound surface condensing. Each engine drives two pumps, and together the engines are capable of pumping 500 cubic feet per minute to a height of thirty-four feet, but the machinery is made aiiffioiently strong to pump against a head of sixty feet. The boilers, three in number, are Lancashire, with Galloway tubes, the flues from which lead into a chimney seventy feet high. The pumps have double action plunjers, which suck the water out of the sewage pipes, discharging it through an iron pipe to the Sandhills. The latter is two feet in diameter, of oast iron, and is also provided with a very largo air vessel. Ibis pipe crosses the old city outfall drain, the latter passing under the pipe through a concreted syphon. At this point the pipes have V shaped branches, each provided with sluice valves, and contained in a concrete manhole. One of these branches discharges into the old city outfall drain, and the other at the Sandhills 1J miles from the pumps. There the pipes terminate in a low concrete tower, intended to lift the sewage to a height sufficient to enable it to be conveyed by moans of a flume and ditches to the different parts of the Sandhills Eeserve. The condensing water for the engines is provided by an artesian well near the pumping station, which discharges into a cooling pond 60ft long, 30ft wide and 4ft Bin in depth. The warm condensing water circulates in a long concrete channel, and falls again into the pond, where it cools sufficiently to allow of it being used over again. The cooling pond has been designed to save the waste of artesian water.