The Progress of Marine Engineering, From the Time of Watt Until the Present Day #261176

The closed furnace hot-blast system while equally effective is much more economical on account of utiliz ing the heat and reducing the temperature of the waste furnace gases, in order to heat the blast which supports combustion. The furnace is under complete control, and there is no injury resulting from cold air entering the furnace. Methods of feeding and shaking grates are coming into use, so that there may be a continuous coking and heating of the coal, preventing smoke, and. That the grates may be kept free from clinkers and ashes.