SU968124A1

SU968124A1 - Grinder stone

Info

Publication number: SU968124A1
Application number: SU813237884A
Authority: SU
Inventors: Анатолий Михайлович Белоногов; Валерий Геннадьевич Пивоваров; Петр Петрович Добровольский; Долорес Павловна Ермилова; Сергей Михайлович Владимиров
Original assignee: Всесоюзное научно-производственное объединение целлюлозно-бумажной промышленности
Priority date: 1981-01-13
Filing date: 1981-01-13
Publication date: 1982-10-23

Description

(54) ДЕФИБРЕРНЫЙ КАМЕНЬ(54) DEFIBER STONE

1 Изобретение относитс к устрой- ,1 The invention relates to a device

ствам дл разделени волокнистого сырь на волокна и может быть использовано в целлюлозно-бумажной промышленности .for separating fiber raw materials into fibers and can be used in the pulp and paper industry.

Известен дефибрерный камень, на поверхности которого выполнены винтовые канавки. Дл одной половины камн канавки выполнены в виде правой нарезки, адл другого - в виде левой . Направление вращени камн выбираетс таким, чтобы перемещение воды.по канавкам происходило в сторо ну обоих торцов камн 1.Known defibrous stone, on the surface of which is made screw grooves. For one half of the stone, the grooves are made in the form of a right cut, while the other is made in the form of the left. The direction of rotation of the stone is chosen so that the movement of water along the grooves occurs in the direction of both ends of the stone 1.

Однако выполнение винтовых канавок на поверхности керамического дефибрерного камн потребовало больших затрат ручного труда и значительного расхода дорогосто щих алмазных отрезных кругов.However, the implementation of the helical grooves on the surface of the ceramic fiber stone required a large amount of manual labor and a significant consumption of expensive diamond cutting wheels.

Наиболее близким к предлагаемому вл етс дефибрерный камень, имеющий цилиндрическое тело с рабочим слоем. выполненным в виде набора керамических многогранных сегментов, образующих концентрические кольца 2.Closest to the proposed is a groundstone stone having a cylindrical body with a working layer. made in the form of a set of ceramic polyhedral segments forming concentric rings 2.

ОДнако известное устройство имеет недостаточно высокую производительность . аHowever, the known device has insufficient performance. but

Целью изобретени вл етс повышение производительности.The aim of the invention is to increase productivity.

Поставленна цель достигаетс тем, что в дефибрерном камне, имеющем ци10 линдрическое тело с рабочим слЬем, выполненным в виде набора керамических многогранных сегментов, образующих концентрические кольца, сегменты в каждом концентрическом кольце име15 ют на их боковых гран х уступы глубиной , равной толщине рабочего сло , образующие со смежными сегментами канавки , при этом рассто ние менуцу канавками в каждом концентрическом коль20 це не превышает длину дуги дефибрировани .The goal is achieved by the fact that in a ground stone having a cylindrical body with a working layer made as a set of ceramic polyhedral segments forming concentric rings, the segments in each concentric ring have on their lateral faces steps equal to the thickness of the working layer, grooves with adjacent segments, while the distance between menutz grooves in each concentric ring does not exceed the length of the defibration arc.

Claims

FIG. 1 shows a part of the sweep of the working surface of a ground stone; in fig. 2 - segment, in axonometry. The working layer of stone consists of several concentric rings 1. Rings 1 are formed by segments 2 of conventional construction and segments 3 with fittings on the lateral faces. At the same time, the segments 3 with ledges are installed during the assembly of the stone so that the ledges form grooves 4 with the faces of adjacent segments 2. The shoulders 2 are made during the formation on the lateral edges of the segment 60-b5 mm deep from the working surface and 15-20 wide mm The depth is equal to the thickness of the working layer. Ground stone works as follows. To feed the wood to the working surface of the ground stone, the feed bar is provided with a feeder made in the form of a shaft or in a press box. The distance between the front and rear (in the direction of the stone's rotation) walls of this feeder determines the length of the defibration zone. This value, referred to the surface of the ground stone, is called the length of the defibration arc. During stone operation, wood is pressed against the surface of a rotating fiber stone, partially immersed in a bath of water. Abrasive grains, protruding above the surface of the stones, promote the separation of wood fibers and tufts from wood. The separated fibers are partially removed from the defibration zone onto the surface of the rotating defibration stone. The remaining part of them goes into the grooves first, and then you are also carried out from the defibration zone. Then the fiber is washed off from the surface and washed out of the grooves k with shower water and comes in the form of a fiber suspension and a bath of a screener. Fibers trapped inside the grooves inside the grooves do not cause further grinding and crushing. This reduces the amount of fines in the pulp composition and improves its quality and physicomechanical characteristics. In addition, the clogging of the abrasive stone surface by the fiber is reduced and thereby the efficiency of its effect on the wood is increased, and, accordingly, the efficiency of the defibration is increased. However, the distance between the segments with ledges installed in one ring, which together with the segments of a conventional construction form grooves, should not be longer than the length of the defibration arc. Otherwise, the process conditions in the defibration zone vary depending on whether this zone is located or where the groove is not located. A reduction in the clogging of the working abrasive surface of the stone by the fiber makes it possible to increase the productivity of the defibration to 15 and to reduce the specific energy consumption by up to 14%. The invention is a granite stone having a cylindrical body with a working layer made as a set of ceramic polyhedral segments forming concentric rings, characterized in that, in order to increase productivity, the segments in each concentric ring have on their lateral faces x ledges with a depth equal to the thickness the working layer, forming with adjacent segments of the groove, while the distance between the grooves in each concentric ring does not exceed the length of the defibration arc. Sources of information taken into account in the examination 1. USSR author's certificate W 204118, cl. D 21 B 1/14, 1966.

2. Laskeev P. X. Production of wood pulp. M., 19b7, p. 81 (prototype).