Rotary kettle
The spherical rotary cooker is a metal-coated hollow sphere that the industrial production of paper from rags was used (rags) in the 19th and early 20th centuries.
history
The device was developed by the brothers Louis and Prosper Joseph Maria Piette , who are active in paper production, in 1838, who sent it to the Bryan Donkin & Co company for production , as they did not have the financial means themselves.
Technology and functionality
The hollow ball, riveted together from sheet iron, rests on two brackets with two hollow pins and is slowly set in rotation by the pulley by a screw that engages the helical gear on the pin. Inside the stove are rails that turn the rags; Manholes are used for filling and emptying and are closed by means of lids and union screws. A two-part pipe goes through the spigot, which allows the cooking steam through the lower part after the shut-off valve has been opened, while the upper part receives a pressure gauge , a blow-off and safety valve, an air tap and a pipe. A similar pipe with the water and lye line is connected to the drain. Two sieves prevent the hollow pieces from clogging by placing rags in front of them and serve to separate the lye etc. from the latter, while a tap is used to drain the last remaining liquid. The content of these cookers is on average 2000 to 3000 kg rag and is cooked for 3 to 4 hours.
Individual evidence
- ↑ paper . In: Meyers Großes Konversations-Lexikon . 6th edition. Volume 15, Bibliographisches Institut, Leipzig / Vienna 1908, p. 389 .