New Boiler Plant at Dalmarnock Power Station

The plant was installed at the Glasgow Corporation Electricity Department Generating Station at Dalmarnock during 1936–7, and consists of six Yarrow water-tube boilers, each capable of evaporating 200,000 lb. of steam per hour at 625 lb. per sq. in. working pressure, superheated to 850 deg. F. The boilers are the largest in Scotland and are typical of modern practice in steam generating plant for large power stations. The description of the plant includes particulars of the boiler drum scantlings, tube sizes, and spacing; the effect of bending on the drum design; the pipe connexions between water-wall headers and boiler; the preliminary heating arrangements; and the automatic interstage control of steam temperature. A table gives results of tests at three different loads, and curves of fuel consumption are included. Particulars are also given of the time taken to execute the work, and the paper concludes with some operating notes.