Patent GB-189827389-A (GB)
Title: Method of and Apparatus for Purifying Gases and Obtaining Constituents or By-products contained therein.
Inventor: THEISEN EDUARD
Filed: 1898-12-28
Granted: 1899-12-23
Abstract: 27,389. Theisen, E. Dec. 28. Smoke and fumes, treating; blast apparatus.- Relates to a process and apparatus for purifying gases from coke ovens &c. and obtaining constituents contained therein, applicable in connection with steam-boiler furnaces for the purpose of simultaneously producing a good draught and for separating carbonaceous and other matters from the gases. The process is carried out in two steps by the centrifugal machines shown in Figs. 1 and 3 respectively. Referring to Fig. 1, the centre piece D carries, upon a ring E, a series of drums F<1>, F<2>, F<3>, made up of alternate oblique and radial blades which revolves in chambers formed by fixed annular walls G<1>, G', G<3> and serve to propel the gas, drawn in at C by the blades b, d, through the apparatus in a zig-zag course and to force it into intimate contact with the water or other liquid which trickles down the walls. The walls are hollow and perforated, and are either formed with a number of narrow transverse ribs or are covered with wire gauze in order to distribute the liquid over an extended surface. The inner wall G' may be provided with a heating- coil, and the liquid is supplied to it, at m', in as small a quantity and as hot as possible, so that, upon coming into contact with the gas, it evaporates, and becomes intimately mixed with and serves to cool it. Any liquid that may flow off this wall escapes at g<1> into a channel k<1> on the base K. Larger quantities of water are supplied to the walls G<2>, G<3>, so that, upon contact with them, the aqueous vapour and the absorbed ammonia are condensed; the liquids escape at g', g<3>. The gas escapes at N, and is led to the second machine shown in Fig. 3. This consists of three cylindrical systems of cells Z', Z<2>. Z<3>, fixed, one within the other, upon the base of a casing x, z which may be raised and lowered and the fixed top x<1> of which is made tight by a hydraulic joint. The gas, entering at C', is propelled through the apparatus to the outlet N' by means of a series of rings of fan blades T, mounted by means of a disc y on the shaft A'. Each system of cells is composed of a number of superposed flat rings s, from which project vertical rings s', s', arranged so as to form zig-zag passages, and deflecting-rings t<1> which direct the gas into the passages. The liquid is charged into the outermost system of cells by a pipe u, and as, in consequence of the action of the fan blades, the pressure of the gas increases from the centre to the periphery of the casing, the liquid stands at a higher level on the outer sides of the rings s' than on their inner sides, and at a higher level in the cells of the outer system than in those of the inner, so that the inner systems may be fed from the outer by siphon pipes q', q<3>. It will be seen that the gas moves from the centre to the periphery of the apparatus, and that the liquid moves in the opposite direction. Reference is made to Specification No. 16,726, A.D. 1892.