GB119663A - An Improved Bleaching Boiler Plant. - Google Patents

Abstract

119,663. T³tsch, C. Oct. 2, 1917, [Convention date]. Circulating fluids through materials.-A bleaching-kier comprises inner and outer closed vessels 1, 2, the outer vessel 2 containing a heating-coil 10 and communicating by a pipe 25 with a pump 22 having a discharge pipe 21 with a four-way cock 20, which serves to place one section of the circulation pipe 18 of the inner vessel 1 in communication with the pipe 21 and the other section in communication with a pipe 23 leading back to the outer vessel 2; with this arrangement, the inner vessel takes the pumping pressure and can be made considerably lighter than the outer vessel, which takes the higher boiling pressure. To prevent the pressure in the inner vessel from rising above a predetermined maximum, counterweighted valves 1 are provided in the sections 11 connecting the inner vessel with the circulation pipe 18. Three-way cocks 26, 26<a> enable the pipe 25 to be connected respectively to a discharge pipe 27 and to a pipe 27<a> leading to a water container. The upper part of the circulation pipe 18 is removable with the covers 5, 7 of the vessels. The pipe 23 is curved to direct the lye into the vessel 2 in a tangential direction. The inner vessel may be made in one or more parts, each provided with a straining-bottom. In use, an airescape cock 31 is opened, and lye is admitted by a cock 28 into the outer vessel 2 and pumped through the lower section of the circulation pipe 18 into the inner vessel 1 until it flows off through the cock 31 and attains a sufficient height in the outer vessel 2 as indicated by a water-gauge 41 and index 42; the cocks 2S, 31 are then closed and the lye circulated by means of the pump 22, the direction of circulation being reversed when desired by means of the four-way cock 20. In the arrangement shown in Fig. 3, the vessels are disposed horizontally, and the inner vessel 1 is rotatably supported by means of channel-bars 35 on rollers 36 carried by a carriage 37, which runs on rails 38 secured to the outer vessel 2.