SU1494965A1 - Apparatus for granulating fibrous materials - Google Patents

Abstract

The invention relates to construction and is used in the manufacture of building heat insulating materials. The goal is to increase productivity and reduce specific energy consumption. The device comprises a cylindrical body 1 with openings in the lower part. Inside the casing, the rows of pins 5 are rigidly fixed and a rotating rotor 3 with hinged hammers 4 is mounted. By gradually increasing the height of the pins from row to row in the direction of rotation of the rotor, starting from the loading nozzle, the specific energy consumption for the processing of the fibrous material and productivity increases. 3 ill., 1 tab.

Description

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The invention relates to the construction and can be used in the manufacture of building heat insulating materials, in particular for grinding and granulating fibrous materials with an average fiber diameter of less than 3 microns.

The purpose of the invention is to improve performance and reduce energy costs.

Figure 1 presents the proposed device, the cross-section; figure 2 is a view of And figure 1; on fig.Z - section in figure 2.

The device comprises a cylindrical body 1 with a loading nozzle 2.

In the lower half of the body, holes are formed, the total area of which is not less than 50% of the area of the lower half of the body, and the largest size is equal to the maximum permissible size of the granules. The holes may have a round, oval or polygonal shape, and the non-circular holes are preferably positioned so that their largest size is parallel to the axis of the body or makes a small angle with it.

The rotor 3 mounted in the housing is equipped with hammers 4 that are hinged in a spiral on it. The housing has three or more rows of pins 5. The housing is enclosed by a casing 6 with an inclined net 7 and frame 8 and a discharge opening 9.

The bottom wall of the nozzle 2 is made integral with the case and serves as a table 10 for feeding materials into the housing 1.

The motor 11 is connected by a V-belt transmission with the rotor 3 and the two-shaft vibration device 12, oscillating mesh grid in the grid plane. A hopper is placed under the net pan for collecting non-inclusions that have passed through the grid. At the end of the end portion of the hammer ribs are made.

The device works as follows.

The layer of fibrous material on the table 10 is fed to the inlet nozzle 2 and then to the last row of pins 5. The hammers, which break together with the rotor, alternately pass into the space between the pins 5, and the maximum size of the edges is pulled from the layer of fibrous material

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does not exceed the sloshin layer. Due to the ribs at the working end of each hammer, the torn lump is retained on the surface of the moving hammer.

When the hammer passes into the gap between the pins 5 of the first row, a section is separated from the lump, the size of which is approximately equal to the height of the pins of this row. During the subsequent passage of the hammer into the gaps between the pins from the remaining lump, the areas whose dimensions are determined by the difference in the heights of the pins of the adjacent rows are torn off. The direction of the ribs on the working end of the hammer is 45-65 with the longitudinal axes of the hammer. The angle is selected from the condition of preventing the lump from sliding under the action of a centrifugal force to the end of the hammer (slipping is observed when the ribs are tilted to the longitudinal axis of the hammer at an angle of less than 45 °) and at the same time preventing the torn lump on the front surface of the hammer (when the ribs are tilted to the longitudinal axis hammer at an angle

more than 65).

Plots torn off from the lump due to interaction with the inner surface of the body, with the surfaces of the hammers and pin are exposed

additional grinding, partial seaming in spindle-shaped granules and when they reach a size smaller than the size of the holes in the body, pour on the mesh

pallet. Due to the longitudinal oscillation of the pallet, the granulate is moved to the discharge opening and simultaneously separated from the granule by non-fibrous inclusions and

small fragments of fibers.

The use of several rows of pins with a gradual increase in their height provides greater uniformity and productivity of the process

grinding of large lumps detached from the layer of fibrous material; installation of hammers on the rotor in a spiral and increasing angular displacement of each row also contributes to this

pins relative to the previous one. Due to this mixing, the number of hammers that are at each time point between the plugs of one of the rows does not exceed the number of turns of the helix.

on which the hammers are fixed on the rotor. In this case, at any time, the rotor hammers can pass into the intervals between the pins of only one of the rows. The uniformity of the grinding process of the fibrous material prevents the dynamic impacts that are inevitable when the thick layer of the fibrous material is crushed, and reduces energy consumption (up to 0.3 kWh / m granule) at a constant performance or increases the productivity of the installation at constant energy consumption.

The table presents the experimental data on performance and energy consumption when using different amounts of stubs.

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ula invention

A device for granulating fibrous materials, comprising a cylindrical body with a load-carrying branch pipe, made in the lower part with openings for the exit of granules, installed in the case of a rotor with hammers, characterized in that, in order to increase production and reduce specific energy consumption, it additionally contains Three or more rows of pins fastened to the inner surface of the housing, the pitch of the pin being increased in the direction of rotation of the rotor, starting from the loading nozzle.

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Claims (1)

Claim A device for granulating fibrous materials, comprising a cylindrical body with loading nozzle, made in the lower part with openings for the exit of granules, a rotor with hammers installed in the housing, characterized in that, in order to increase productivity and reduce specific energy costs, it additionally contains three and more rows of pins mounted on the inner surface of the housing, and the height of the pins is made increasing in the direction of rotation of the rotor, starting from the loading pipe. Number of rows of pins The height of the pins, mm, in rows Productivity, m * / h Power consumption kW Specific energy consumption, kWh / m ’ 1 ι eleven ι ι I 1 Η 1 1 eleven G ...... 1 eleven ’Th 1 eleven eleven !---------------------------1 1 s 1 1 HI 1 1 HI 1 1 1 1 ι ι eleven eleven t>! 1 HI i 1 1 ____________________________________ ι V 0 1,2 1.33 1.12 1 10 1.8 2.08 1.15 2 10 10 2,5 2.28 0.91 2 10 5 3.2 1,54 0.48 3 10 10 10 3,5 2.66 0.76 3 10 6 3 Μ 1.34 0.32 5 10 8 6 4 2 4.3 1,52 0.35 MA I