708 MODERN GASWORKS PRACTICE
“ Blue ” Water-Gas Plants
Of the “ blue ” water-gas plants, the Kramers and Aarts apparatus, and also the Dellwik plant, have been extensively adopted on the Continent, and both plants liave made some headway in this country.
The former plant—known as the “ K. & A.”—is unique in that the generator is composed of two vessels, and, while during the “ run ” these are used in series, during the “ blow ” they are worked in parallel. It is forind that this device permits
Fig. 438.—Sbctional Plan on Fig. 437.
the period of blowing to be about one-quarter of that required in the plants previ-ously described, and therefore the time of gasmaking is correspondingly increased. A section of the apparatus is depicted in Fig. 436, and by referring to this the system of working can. be readily followed. It will be noticed that between the two generators, a third vessel, known as a regenerator, is interposed. Düring the “ blow,” this is heated up by the hot gases from the fires. Düring the “ run,” steam is introduced to one of the generators and is converted. into carbon dioxide and mon-oxide ; it then traverses the regenerator, where the surplus steam is split up and