A recycled pulp tanning equipment for grey board production

Abstract

A recycled pulp tanning device for gray board production, including a silo body composed of two horizontally opposed silos that intersect at the center, a feed chamber is arranged at the top of the center of the silo body; in the center of the silo, rotating shafts are horizontally installed at both ends through sealed bearings, the rotating shafts rotate in the same direction, and rotating drums are installed on the rotating shafts, and a plurality of rows of blades are arranged at equal angles on the surface of the rotating drum, the rotating radius of the blades is less than the radius of the inner wall of the silo by 5-8cm, and the blades of the two rotating drums are arranged in staggered positions; a plurality of tanning strips are arranged on the inner wall of the rotating drum in a transverse protrusion, and a discharge port is arranged at the bottom of the silo. The rotating shafts of the utility model rotate in the same direction, and when they rotate to the intersection of the silos, half of the pulp will rotate from top to bottom, and the other half will rotate from bottom to top, and the intersection has a smaller cross-section, and the pulp will be compressed, staggered sheared, and rubbed against each other here, so that the pulp fibers are staggered, increasing the tightness and complexity of the connection.

Description

Technical Field

[0001] The utility model relates to a tanning device, in particular to a recycled pulp tanning device used for grey paperboard production. Background Art

[0002] The basis weight of grey paperboard is generally above 120g / m2, with high thickness and low tightness. Recycled waste paper is mainly used as raw material, and the product is mainly used for packaging and other aspects. Because recycled waste paper is used, the tightness and interlacing between the pulps after pulping are not good, and tanning is required to make the internal fibers interlaced, which can improve the strength of subsequent paper. The tanning equipment currently used is similar to a mixer, which tans forward and reversely, but because the pulp rotates in the same direction when rotating, countercurrent only occurs when the direction is changed. The tanning time is long and the effect is not very ideal. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a recycled pulp tanning device for grey paperboard production, so as to solve the technical problems in the above-mentioned background technology.

[0004] The technical solution of the utility model is:

[0005] A recycled pulp tanning device for grey board production, comprising a silo body consisting of two horizontally opposed silos whose central parts intersect, a feeding chamber being arranged at the central top of the silo body; rotating shafts are horizontally installed at both ends of the center of the silo through sealed bearings, the rotating shafts rotate in the same direction, rotating drums are installed on the rotating shafts, a plurality of rows of blades are arranged at equal angles on the surface of the rotating drum, the rotating radius of the blades is 5-8 cm smaller than the radius of the inner wall of the silo, and the blades of the two rotating drums are arranged in staggered positions; a plurality of tanning strips are arranged to protrude laterally from the inner wall of the rotating drum, and a discharge port is arranged at the bottom of the silo.

[0006] Furthermore, the distance between the outer walls of the drum is 1-2 cm greater than the length of the blades.

[0007] Furthermore, the lateral overlap distance between the silos is 80%-100% of the radius difference between the inner wall of the silo and the outer wall of the drum.

[0008] Furthermore, pulleys are installed at both ends of one of the rotating shafts, and a pulley is installed at one end of the other rotating shaft, and the pulleys are connected to each other at one end of the two rotating shafts installed with the pulleys through a belt.

[0009] Furthermore, supporting feet are arranged at the four corners of the bottom of the warehouse body.

[0010] The utility model is beneficial in that:

[0011] When the rotating shafts of the utility model rotate in the same direction, the pulp will be divided into two parts inside and rotate under the drive of the blades. During the rotation, the pulp is cut and mixed by the blades and tanned with the tanning strips. When it rotates to the intersection of the silo, half of the pulp will rotate from top to bottom and the other half will rotate from bottom to top. The intersection has a smaller cross-section, and the pulp will be compressed, sheared and rubbed against each other here, so that the pulp fibers are staggered, increasing the tightness and complexity of the connection, thereby completing the rapid tanning of the pulp and improving the subsequent paper strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0013] Figure 2 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;

[0014] Figure 3 This is a cross-sectional view of the utility model;

[0015] Figure 4 This is a schematic diagram of the installation coordination between the drum and the blades.

[0016] In the figure: 1-silo body, 11-silo, 12-discharge port, 13-support leg, 2-feeding chamber, 3-rotating shaft, 31-sealed bearing, 4-rotating drum, 5-paddle, 6-tanning strip, 7-pulley, 71-belt. DETAILED DESCRIPTION

[0017] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0018] like Figure 1-4 As shown:

[0019] A recycled pulp tanning device for gray board production, comprising a silo body 1 consisting of two horizontally opposed silos 11 intersecting at the center, a feeding chamber 2 is arranged at the center top of the silo body 1; rotating shafts 3 are horizontally installed at both ends of the center of the silo 11 through sealed bearings 31, the rotating shafts 3 rotate in the same direction, and a rotating drum 4 is installed on the rotating shaft 3, a plurality of rows of paddles 5 are arranged at equal angles on the surface of the rotating drum 4, the rotation radius of the paddles 5 is smaller than the radius of the inner wall of the silo 11 by 5-8 cm, and the paddles 5 of the two rotating drums 4 are arranged in staggered positions; a plurality of tanning strips 6 are arranged to protrude laterally from the inner wall of the rotating drum 4, and a discharge port 12 (each equipped with a discharge butterfly valve) is arranged at the bottom of the silo 11.

[0020] The utility model mainly utilizes the volume change of recycled pulp during the rotation along the silo 11 and the stirring and mixing of the blades 5 to complete the tanning process. During operation, the material needs to be added above the highest point of the silo 11, that is, part of the feed chamber 2 will also be filled, so as to ensure that the silo 11 is filled with recycled pulp. Then the equipment is started, and the shaft 3 rotates in the same direction. Driven by the blades 5, the pulp will be divided into two parts inside and rotate. During the rotation, it will be cut and mixed by the blades 5, and tanned with the tanning strips 6. When it rotates to the intersection of the silo 11, half of the pulp will rotate from top to bottom, and the other half will rotate from bottom to top, and the intersection will have a smaller cross-section. The pulp will be compressed, sheared, and rubbed against each other here, so that the pulp fibers are staggered, and the tightness and complexity of the connection are increased, thereby completing the rapid tanning of the pulp, thereby improving the subsequent paper strength.

[0021] In order to completely intersect and shear the two pulps at the intersection, the distance between the outer walls of the drum 4 is 1-2 cm greater than the length of the blade 5, so that the blade 5 almost completely intersects at the intersection, thereby driving the pulp to completely intersect. When the silo 11 overlaps horizontally to zero, the pulp compression volume here is zero. In theory, the greater the compression, the better. However, since the pulp is in a paste state, it still has fluidity. Therefore, when the compression ratio increases to a certain extent, the pulp will be blocked at the top. Therefore, after many experiments, the lateral overlap distance between the silos 11 is 80%-100% of the radius difference from the inner wall of the silo 11 to the outer wall of the drum 4. When the intersection reaches 100%, the maximum compression volume at the intersection is half.

[0022] In order to solve the problem of the rotating shafts 3 rotating in the same direction, pulleys 7 are installed at both ends of one of the rotating shafts 3, and a pulley 7 is installed at one end of the other rotating shaft 3. The pulleys 7 are connected to one end of the two rotating shafts 3 through a belt 71, and support feet 13 are provided at the four corners of the bottom of the warehouse body 1 for easy installation.

[0023] The above is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A recycled pulp tanning equipment for grey board production, characterized in that: The invention relates to a silo body which is composed of two horizontally opposed silos whose central parts intersect, and a feeding chamber is arranged at the central top of the silo body; rotating shafts are horizontally installed at both ends of the center of the silo through sealed bearings, and the rotating shafts rotate in the same direction, and rotating drums are installed on the rotating shafts, and a plurality of rows of blades are arranged at equal angles on the surface of the rotating drum, and the rotating radius of the blades is 5-8cm smaller than the radius of the inner wall of the silo, and the blades of the two rotating drums are arranged in staggered positions; a plurality of tanning strips are arranged to protrude laterally on the inner wall of the rotating drum, and a discharge port is arranged at the bottom of the silo.

2. The recycled pulp tanning equipment for grey board production according to claim 1, characterized in that: The distance between the outer walls of the rotating drum is 1-2 cm greater than the length of the blades.

3. The recycled pulp tanning equipment for grey board production according to claim 1, characterized in that: The lateral overlapping distance between the silos is 80%-100% of the radius difference from the inner wall of the silo to the outer wall of the drum.

4. The recycled pulp tanning equipment for grey board production according to claim 1, characterized in that: Pulleys are installed at both ends of one of the rotating shafts, and a pulley is installed at one end of the other rotating shaft. The pulleys are connected to each other through belts at one end of the two rotating shafts where the pulleys are installed.

5. The recycled pulp tanning equipment for grey board production according to claim 1, characterized in that: The four corners of the bottom of the warehouse body are all provided with supporting feet.

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