SU433261A1 - COOKING BOILER OF THE YAKOVLEV SYSTEM FOR CONTINUOUS COOLING OF CELLULOSE - Google Patents

Description

The invention can be used in the pulp and paper industry.

A cooking pot for continuous pulping is known, including a vertical housing, fittings for supplying chips and pulping, and a cooking liquor recycling system.

The purpose of the invention is to obtain high-quality cellulose from a brush that is heterogeneous in structure and natural properties.

This is achieved by the fact that in the boiler body along the cooking zones there are mounted devices for intermediate extraction of cellulose, each of which is made in the form of two conical bottoms with a stirrer above the upper perforated bottom, arranged tapering to each other, and in the center pipe The side wall of the vertical boiler body between the bottoms is placed the cellulose extraction fitting.

FIG. I and 2 depict the proposed boiler.

In the vertical case 1 of the digester two vertical shafts 2 are placed, which have mechanical drives 3. A charging auger 4 is mounted in the upper part of the upper shaft, the blades 5 and the lower unloading auger 6 are located in the lower part.

Above the loasti on the shaft is placed a restrictive cone 7.

On the lower vertical shaft there is a cone 7, blade 5, auger bn scraper agitators 8.

The extraction areas for the finished mass 9 have an upper bottom 10 of a perforated sheet with holes, a discharge pipe 11, a bottom blank plate 12, a ring & mesh 13 for sampling the liquor, fittings 14 and 15 for the liquor and the mass, respectively. The digester has a separate housing for diffusion flushing of the mass 16 with several isolated flushing zones and fittings 17 for discharging the mass from the cooking apparatus.

Chips soaked in cooking liquor are piped to the top of the digester where part of the excess solution is removed from the apparatus through the screen. Nris movement of chips in the apparatus from above

downward and with the intensive recirculation of the hot cooking solution, the pulping process takes place through the liquid recirculation system. At the intermediate stage of cooking, when the fine chip fractions managed to boil

the remaining pulp mass is still a solid fraction, the whole mass falls on the bottom 10. The layer of mass on the bottom 10 is subjected to mechanical action by the rotating shaft 2 of the blades 5.

The soft, welded fiber is mechanically separated from the solid chips and, under the action of the Pressure Drop, falls through the sieve holes. The solid chips under the action of the blades 5 rolls down to the center of the bottom and under the action of the screw 6 through the pipe 11 enters the second cooking zone, where the process of addition of the chips continues.

The welded s-mass passing through the openings of the sieves is removed through the shtucer 15 from the cooking apparatus into the diffusion washing chamber of the mass 16.

The mass located in the second cooking zone again passes through a similar device, where a good mass is separated from the heat sink. A good mass is removed to the diffusion washing chamber, incomplete through patrbo 11 with screw 6. It is fed into the additional cooking chamber. The welded nepovar through shtucer 17 is removed from the cooking apparatus.

Subject invention

A cooking chamber for continuous pulping, including a vertical body, chips for feeding chips and pulp outlets, and a cooking liquor recirculation system, characterized in that, in order to obtain high-quality cellulose from chips that are not uniform in structure and natural properties, in a boiler body; The cooking zones are equipped with devices for intermediate extraction of cellulose, each of which is made in the form of two conical bottoms with a stirrer above the upper perforated bottom, arranged tapering to each other, and A neutral pipe with a screw, and in the side wall of the vertical body of the boiler between the bottoms there is a pulp extraction chuck.

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