SU565962A1 - Apparatus for washing and bleaching cellulose- - Google Patents

Claims (2)

(54) A DEVICE FOR WASHING AND BLEACHING OF CELLULOSE-CONTAINING MATERIALS children to clog perforation holes with a fibrous material. The supply of water through sprinkling inside the mass pipeline leads to an additional dilution of liquors. The purpose of the invention is to intensify the process of washing and bleaching of cellulose containing materials. This is achieved by the fact that the holes of the lane of the mass pipeline are made in the form of a match 1 to 70, and the mass with an opening angle from 1 to the wire is installed with the possibility of rotation around its axis. Pa figs. 1 is a schematic diagram of the proposed device; in fig. 2 shows the mass pipeline, a section. The device has a mass of wire 1, the entire surface of which are holes 2. The mass pipeline is installed on sliding bearings 3,. connected to a rotational drive 4 and enclosed in a housing 5, divided into two parts by means of a seal 6. The device is equipped with a mass pump 7, pipelines 8 and 9, respectively, for supplying mass and reagents, pipelines U and I, respectively, for pulp removal and removal of reagents , as well as valves 12 on the pipelines. The device works as follows. The original pulp mass is pumped through the pipeline 7 into the interior of the perforated mass pipeline 1, which periodically or continuously rotates. The washing and bleaching liquids through pipelines 9 enter the casing 5, from where through holes 2, made in the form of nozzles on the mass pipeline I, penetrate into the moving pulp mass, and the filtrate is continuously removed also through holes 2 on the mass pipe 1 and then enters the body 5, from where piping 11 is fed to regeneration or for subsequent washing and separation stages. The washed cellulose suspension from the washing zone enters the bleaching zone, where it is subjected to treatment with white reagents and at the exit; the pipeline 10 is supplied for further processing through the technological cycle. As a result of continuous or intermittent rotation of the perforated mass pipeline, continuous interconnection of reagent inlets and filtrate outlet openings occurs, which ensures the constant regeneration of perforations of the mass pipeline from the plugging ah. As a result of the continuous regeneration of the filtering surface of the mass piping as well as the design of the perforation holes made in the form of nozzles, opportunities are created for intensifying the washing and bleaching processes. Maintenance is simplified, specific capital expenditures are reduced, the amount of wastewater is reduced, energy costs are reduced, and opportunities are created for wide regulation by capacity. Apparatus for washing and bleaching cellulose-containing materials, including a perforated mass line, enclosed in a divided body, pipelines for supplying and discharging pulp, reagents and filtrate, characterized in that, in order to intensify the process of washing and bleaching, the holes the perforations are made in the form of nozzles with an opening angle of from 1 to 70 ° and the mass pipe is mounted for rotation around its axis. Sources of information taken into account in the examination: 1. US Patent No. 3622262, cl. D 21 C 9 / OO. 1967. / -h ChHZ / g / -M i 5 5 / / rm eight OU X   T U % 1Z XZHg -but Urt figure 1 FIG. 2