阅读说明：本技术 一种竹浆纤维筛分装置 (Bamboo pulp fiber screening plant ) 是由 陈丙才 吴和岭 李晓琴 丁良屏 于 2021-08-11 设计创作，主要内容包括：本发明公开了一种竹浆纤维筛分装置,包括筛分筒体,在筛分筒体内安装有筛框,所述筛分筒体与筛框均呈圆筒形,在所述筛框上均匀开设有筛孔,在所述筛框的外壁与筛分筒体的内壁之间限定出一筛分腔,在筛框中部安装有搅拌组件,筛框下部连接进浆管道,上部连接出浆管道,筛分腔下部连接细小组分排放管道。竹浆通过进浆管道泵入至筛框内,使所述搅拌组件转动,推动竹浆中的细小组分穿过所述筛孔流向所述筛分腔,并通过所述细小组分排放管道排出,良浆则通过出浆管道排出。该竹浆纤维筛分装置,能够有效筛除竹浆中的细小组分,进而提高竹浆生活用纸中纤维间的结合力,克服竹浆生活用纸粉尘较重的问题,此外,也可显著提升竹绒毛浆的品质。(The invention discloses a bamboo pulp fiber screening device which comprises a screening cylinder body, wherein a screen frame is arranged in the screening cylinder body, the screening cylinder body and the screen frame are both cylindrical, screen holes are uniformly formed in the screen frame, a screening cavity is defined between the outer wall of the screen frame and the inner wall of the screening cylinder body, a stirring assembly is arranged in the middle of the screen frame, the lower part of the screen frame is connected with a pulp inlet pipeline, the upper part of the screen frame is connected with a pulp outlet pipeline, and the lower part of the screening cavity is connected with a fine component discharge pipeline. The bamboo pulp is pumped into the screen frame through the pulp inlet pipeline, so that the stirring assembly rotates to push fine components in the bamboo pulp to pass through the screen holes to flow to the screening cavity and be discharged through the fine component discharge pipeline, and good pulp is discharged through the pulp outlet pipeline. This bamboo pulp fiber screening plant can effectively screen the tiny component in the bamboo pulp, and then improves the cohesion between the fibre in the bamboo pulp domestic paper, overcomes the heavier problem of bamboo pulp domestic paper dust, in addition, also can show the quality that promotes the bamboo fine hair thick liquid.)

1. The bamboo pulp fiber screening device is characterized by comprising a screening cylinder body, wherein a screen frame is installed in the screening cylinder body, the screening cylinder body and the screen frame are both cylindrical, screen holes are uniformly formed in the screen frame, the lower part of the screen frame is connected with a pulp inlet pipeline, and the upper part of the screen frame is connected with a pulp outlet pipeline; a screening cavity is defined between the outer wall of the screen frame and the inner wall of the screening cylinder, and the lower part of the screening cavity is connected with a fine component discharge pipeline;

the middle part of the screen frame is provided with a stirring assembly, the stirring assembly comprises a rotating shaft and a plurality of groups of blades connected to the rotating shaft, and the rotating shaft is driven by a motor to rotate;

bamboo thick liquid passes through advance thick liquid pipeline and go into to the reel along the tangential pump to be the spiral-flow type by lower supreme motion in the reel, motor drive the pivot rotates, drives the multiunit blade rotation, and tiny component passes in the promotion bamboo thick liquid the sieve mesh flow direction sieve branch chamber, and pass through tiny component discharge tube says the discharge, and the fine thick liquid that screens off tiny component passes through go out the thick liquid passageway and flow out.

2. The bamboo pulp fiber screening device of claim 1, wherein the screen holes are circular holes or square holes, and the side length of the hole diameter/square hole of the circular hole is 0.25-0.5 mm.

3. The bamboo pulp fiber screening device of claim 1, wherein a first connecting pipe and a first flange are provided at a lower portion of the screen frame, a second connecting pipe and a second flange are provided at an upper portion of the screen frame, the screen frame is connected to the pulp inlet pipe through the first connecting pipe and the first flange, and the pulp outlet pipe through the second connecting pipe and the second flange.

4. Bamboo pulp fiber screening device according to claim 3, wherein a dilution water pipe is connected to the first connection pipe, and a drain valve is provided at the bottom of the screen frame.

5. The bamboo pulp fiber screening device of claim 1, wherein each set of blades comprises two blades arranged oppositely, the blades are connected to the rotating shaft through a support rod, the blades are arranged obliquely relative to the support rod, and the oblique direction of the blades is matched with the rotating direction of the rotating shaft.

6. The bamboo pulp fiber screening device of claim 5, wherein the inclination angle of the blades relative to the support rod is 0-90%⁰。

7. The bamboo pulp fiber screening device of claim 1, wherein the plurality of sets of blades are arranged on the rotating shaft at intervals from top to bottom, and are arranged in a staggered interval from top to bottom.

8. The bamboo pulp fiber screening device of claim 7, wherein four sets of blades are arranged on the rotating shaft, and in the horizontal projection of the supporting rods corresponding to the four sets of blades, the included angle between two adjacent blades is 45 degrees.

9. The bamboo pulp fiber screening device of claim 1, wherein an overflow pipe is connected to an upper portion of the screening chamber, and the fine components flowing to the upper portion of the screening chamber are discharged through the overflow pipe.

10. Bamboo pulp fibre screening device according to claim 1, characterized in that the pulp inlet pipe is connected with the pressure screen outlet by means of a pressure pump and communicates tangentially with the side wall of the screen frame.

Technical Field

The invention relates to the technical field of pulping and papermaking, in particular to a bamboo pulp fiber screening device.

Background

As is well known, the proportion of fine components such as impure cells in the bamboo pulp reaches more than 30 percent, and the fine components seriously affect the product quality in the paper making of the bamboo pulp for daily use and the production of bamboo fluff pulp. As for the current bamboo pulp household paper, the problem of heavy dust generally exists because the combination between the small components such as impure cells in the bamboo pulp and fibers is weaker, and if the small components such as impure cells in the bamboo pulp can be removed, the paper has great significance for solving the problem of dust of the household paper; in the production of the bamboo fluff pulp, the quality of the bamboo fluff pulp can be obviously improved by removing the small components such as the impure cells and the like in the bamboo fluff pulp, and the bamboo fluff pulp has obvious significance in the aspects of improving the fluffing property, the fluffiness and the dust of the bamboo fluff pulp board.

At present, the screening of fine components in bamboo pulp at home and abroad is almost only stopped in a laboratory, and a pall screening instrument is laboratory screening equipment, but the pall screening instrument is only limited to carry out gradient screening on a small amount of pulp in the laboratory, cannot be applied to large-scale industrialization, and does not have related industrial equipment for screening fine components such as impurity cells and the like from the bamboo pulp at present.

Disclosure of Invention

In view of the defects in the prior art, the invention provides the bamboo pulp fiber screening device which can effectively screen out small components such as hybrid cells in bamboo pulp and is convenient for industrial implementation.

The technical scheme adopted by the invention is as follows: the bamboo pulp fiber screening device comprises a screening cylinder body, wherein a screen frame is installed in the screening cylinder body, the screening cylinder body and the screen frame are both cylindrical, screen holes are uniformly formed in the screen frame, the lower part of the screen frame is connected with a pulp inlet pipeline, and the upper part of the screen frame is connected with a pulp outlet pipeline; a screening cavity is defined between the outer wall of the screen frame and the inner wall of the screening cylinder, and the lower part of the screening cavity is connected with a fine component discharge pipeline;

the middle part of the screen frame is provided with a stirring assembly, the stirring assembly comprises a rotating shaft and a plurality of groups of blades connected to the rotating shaft, and the rotating shaft is driven by a motor to rotate;

bamboo thick liquid passes through advance thick liquid pipeline pump income to the reel in, the bamboo thick liquid passes through advance thick liquid pipeline and go into to the reel along the tangential pump to be the spiral-flow type by supreme motion down in the reel, motor drive the pivot is rotated, and it is rotatory to drive the multiunit blade, and tiny component passes in the promotion bamboo thick liquid the sieve mesh flow direction sieve branch chamber, and pass through tiny component discharge tube says and discharges, and the fine thick liquid of screening tiny component then passes through go out the thick liquid passageway and flow.

As an improvement to the scheme, the sieve pores are circular holes or square holes, and the side length of the aperture/square hole of each circular hole is 0.25-0.5 mm.

As an improvement to the above scheme, a first connecting pipe and a first flange are arranged at the lower part of the screen frame, a second connecting pipe and a second flange are arranged at the upper part of the screen frame, the screen frame is connected with the slurry inlet pipeline through the first connecting pipe and the first flange, and is connected with the slurry outlet pipeline through the second connecting pipe and the second flange.

As an improvement to the scheme, a dilution water pipe is connected to the first connecting pipe, and a drain valve is arranged at the bottom of the screen frame.

As an improvement to the above scheme, each group of blades comprises two blades which are oppositely arranged, the blades are connected to the rotating shaft through a supporting rod, the blades are obliquely arranged relative to the supporting rod, and the oblique direction of the blades is matched with the rotating direction of the rotating shaft.

As an improvement to the scheme, the inclination angle of the blades relative to the supporting rod is 0-90 DEG⁰。

As an improvement to the above scheme, the plurality of groups of blades are arranged on the rotating shaft at intervals from top to bottom, and are arranged in a staggered interval manner from top to bottom.

As an improvement to the above scheme, four sets of blades are arranged on the rotating shaft, and in the horizontal projection of the support rods corresponding to the four sets of blades, the included angle between two adjacent blades is 45 °.

As an improvement to the above, an overflow pipe is connected to an upper portion of the sieving chamber, and the fine components flowing to the upper portion of the sieving chamber are discharged through the overflow pipe.

As an improvement to the above scheme, the slurry inlet pipeline is connected with the outlet of the pressure screen through a pressure pump and is tangentially communicated with the side wall of the screen frame.

Different from the prior art, in the bamboo pulp fiber screening device provided by the invention, bamboo pulp is tangentially pumped into the screen frame through the pulp inlet pipeline, so that the bamboo pulp moves from bottom to top in the screen frame in a rotational flow manner, the motor drives the rotating shaft to rotate, the plurality of groups of blades are driven to rotate, the pressure of the bamboo pulp to the outside of the screen frame is increased, fine components in the bamboo pulp are pushed to flow to the screening cavity through the screen holes and are discharged through the fine component discharge pipeline, and good pulp obtained by screening the fine components flows out through the pulp outlet channel.

This bamboo pulp fiber screening plant, the industrialization is used conveniently, can effectively screen the tiny component in the bamboo thick liquid, and then improves the cohesion between the fibre in the bamboo thick liquid household paper, overcomes the heavier problem of bamboo thick liquid household paper dust, in addition, also can show the quality that promotes the bamboo fine hair thick liquid.

Drawings

FIG. 1 is a schematic structural diagram of a bamboo pulp fiber screening device in an embodiment of the present application;

FIG. 2 is a schematic top view of a stirring assembly in an embodiment of the present application.

Detailed Description

The present invention will be described in further detail with reference to examples. It is to be noted that the following examples are only illustrative of the present invention, and do not limit the scope of the present invention. Similarly, the following examples are only some examples but not all examples of the present application, and all other examples obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "front", "rear", "horizontal", "vertical", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified. In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be connected internally or indirectly to each other. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The invention provides a bamboo pulp fiber screening device which is convenient for industrialized popularization and application, and is used for screening fine components such as impurity cells from bamboo pulp so as to improve the bonding force among fibers in bamboo pulp domestic paper and overcome the problem that the bamboo pulp domestic paper is heavy in dust.

Referring to fig. 1, fig. 1 shows a structure of a bamboo pulp fiber screening device provided in an embodiment of the present application, where the bamboo pulp fiber screening device includes a screening cylinder 10, a screen frame 20 is installed in the screening cylinder 10, both the screening cylinder 10 and the screen frame 20 are cylindrical, screen holes are uniformly formed in the screen frame 20, a lower portion of the screen frame 20 is connected to a pulp inlet pipeline, and an upper portion of the screen frame 20 is connected to a pulp outlet pipeline; a screening chamber 30 is defined between the outer wall of the screen frame 20 and the inner wall of the screening cylinder 10, and the lower part of the screening chamber 30 is connected with the first fine component discharge pipe 11.

The middle of the screen frame 20 is provided with a stirring assembly, the stirring assembly comprises a rotating shaft 401 and a plurality of groups of blades 402 connected to the rotating shaft 401, and the rotating shaft 401 is driven by a motor 41 to rotate.

The bamboo pulp 100 without fine component separation is pumped into the screen frame 20 through the pulp inlet pipeline, the chamber of the bamboo pulp 100 entering the screen frame 20 is enlarged, the flow rate is reduced, the motor 41 drives the rotating shaft 401 to rotate, the plurality of groups of blades 402 are driven to rotate, reverse thrust is generated on the bamboo pulp 100 entering the screen frame 20, the speed of the bamboo pulp 100 flowing upwards to the pulp outlet pipeline is reduced, the retention time of the bamboo pulp 100 in the screen frame 20 is prolonged, the plurality of groups of rotating blades 402 simultaneously push the fine components 101 in the bamboo pulp 100 to pass through the screen holes, flow to the screening cavity 30 and be discharged through the first fine component discharge pipeline 11, and the good pulp 102 screened from the fine components 101 flows out through the pulp outlet channel under the pressure effect of the pumped bamboo pulp 100.

The rotating multiple groups of blades 402 enable the bamboo pulp 100 to generate centrifugal force towards the outer wall of the screen frame, pressure of the bamboo pulp towards the outside of the screen frame is increased, small components 101 in the bamboo pulp 100 flow out of the screen frame in an accelerated mode, and probability of discharging the small components 101 from screen holes is increased.

The bamboo pulp inlet pipeline is communicated with the outer circle of the side wall of the screen frame 20 in a tangential mode, namely the bamboo pulp 100 is pumped into the screen frame 20 along the tangential direction of the outer circle of the side wall of the screen frame 20, so that the bamboo pulp moves from bottom to top in the screen frame in a spiral-flow mode, and the plurality of groups of blades 402 rotate reversely in the pumping direction of the bamboo pulp 100.

Further, the reel 20 can be dismantled and connect and be in on the screening barrel 10, dismantle conveniently, the clearance of reel 20 of being convenient for is maintained and is changed the sieve mesh of different sieve mesh specifications to satisfy the screening requirement of different grades of bamboo pulp.

Further, the sieve pores are circular pores or square pores, the mesh number of the sieve frame is 35-60 meshes, that is, the side length of the pore diameter/square pore of the circular pore is 0.25-0.5 mm, so as to ensure that the fine component 101 in the bamboo pulp 100 with the size range of 0.25-0.5 mm and the size smaller than 0.25mm can smoothly pass through the sieve pores and enter the sieving cavity 30.

Preferably, the sieve holes are round holes with smooth inner walls.

Further, the bottom end of the rotating shaft 401 is connected with the motor 41 through a belt pulley 42 and a belt 43, and the motor is an alternating current motor.

Referring to fig. 1, in the present embodiment, a first connecting pipe 21 and a first flange are disposed at a lower portion of the screen frame 20, a second connecting pipe 22 and a second flange are disposed at an upper portion of the screen frame 20, the screen frame 20 is connected to the slurry inlet pipe through the first connecting pipe 21 and the first flange, and is connected to the slurry outlet pipe through the second connecting pipe 22 and the second flange, and the fine slurry 102 from which the fine component 101 is screened is introduced into a next process through the slurry outlet pipe.

Wherein the first connecting pipe 21 and the second connecting pipe 22 are arranged along the tangential direction of the side wall of the screen frame 20.

Furthermore, advance thick liquid pipeline and pass through pressure pump and pressure screen outlet connection, come from the bamboo thick liquid of bamboo thick liquid slurrying pressure screening miscellaneous screening workshop section, through advance thick liquid pipeline by the pressure pump goes into the bamboo thick liquid fibre screening plant that this embodiment provided and carries out the screening of tiny component, consequently, in the practical application, only need increase one set of this bamboo thick liquid fibre screening plant on current pressure screen outlet pipeline, the industrialization is implemented conveniently.

In this embodiment, a connection hole and a connection flange are formed at a lower portion of the sieving cylinder 10, the first fine component discharge pipe 11 is installed on the sieving chamber 30 through the connection hole and the connection flange, and the fine component 101 sieved from the bamboo pulp 100 is discharged from the first fine component discharge pipe 11 for recycling or treatment.

Further, in the present embodiment, a second fine component discharge pipe 12 is further connected to an upper portion of the sieving chamber 30, and the fine component flowing to the upper portion of the sieving chamber 30 is discharged through the second fine component discharge pipe 12.

Wherein, the first fine component discharge pipeline 11 and the second fine component discharge pipeline 12 are arranged along the tangential direction of the side wall of the screening cylinder 10.

Referring to fig. 2, fig. 2 shows a top view structure of the stirring assembly in this embodiment, each group of blades 402 includes two opposite blades, the blades 402 are connected to the rotating shaft 401 through support rods 403, the two support rods 403 corresponding to each group of blades 402 are in a straight line, the blades 402 are disposed in an inclined manner with respect to the support rods 403, and the inclined direction of the blades is matched with the rotating direction of the rotating shaft 401, so as to reduce the stirring resistance of the stirring assembly and improve the stirring efficiency.

Further, the inclination angle alpha of the blade 402 relative to the support bar 403 is 0-90⁰Preferably, alpha is 30 to 60⁰。

In this embodiment, multiunit blade 402 is interval arrangement from top to bottom in pivot 401, and from last to being big blade, the crisscross interval arrangement of little blade down, and interval setting about big blade has promoted bamboo thick liquid 100 rotational flow's in the reel 20 fluency, can effectively avoid the turbulent flow, prevents the sieve mesh jam, has increased the probability of tiny component outdiffusion in the bamboo thick liquid 100 simultaneously to improve the screening efficiency of tiny fibre.

The blades are arranged into rectangular or trapezoidal pieces, and it can be understood that the larger blade is longer and wider than the smaller blade, and the supporting rod of the larger blade is also longer and thicker than the supporting rod of the smaller blade.

Further, in this embodiment, four sets of blades 402 are disposed on the rotating shaft 401, the four sets of blades 402 are arranged at intervals as a large blade, a small blade, a large blade, and a small blade from top to bottom, and in the horizontal projection of the support rods 403 corresponding to the four sets of blades 402, that is, in the overlooking structure of the stirring assembly, the included angle θ between two adjacent support rods 403 is set to 45 °, eight support rods 403 in total of the four sets of blades 402 are uniformly distributed on the rotating shaft 401 in a radial shape along the circumferential direction, so as to ensure that the bamboo pulp 100 in the screen frame 20 is fully stirred in both vertical and horizontal dimensions, further improve the smoothness of the rotational flow of the bamboo pulp 100, and improve the screening efficiency of the fine fibers.

In a preferred embodiment of this embodiment, a dilution water pipe 23 is further connected to the first connection pipe 21, and during the process that the bamboo pulp 100 is pumped into the screen frame 20 through the pulp inlet pipe, a predetermined amount of clean water can be added through the dilution water pipe 23 to adjust the concentration of the bamboo pulp 100, and further adjust the concentrations of the fine component 101 discharged from the fine component discharge pipe and the good pulp 102 flowing out from the pulp outlet pipe, so that the good pulp 102 directly enters the next treatment process and the fine component 101 is recycled.

In addition, the clean water pumped through the dilution water pipe 23 is also beneficial to fully dispersing the fibers and the fine components in the bamboo pulp 100, so that the screening efficiency of the fine components 101 is improved.

Further, a drain valve is arranged at the bottom of the screen frame 20 for discharging impurities possibly deposited at the bottom of the screen frame 20 during the screening process of the bamboo pulp during the shutdown.

When the bamboo pulp fiber screening device provided by the embodiment is used, firstly, clean water is injected into the screen frame 20 until the clean water flows out from the overflow connecting pipe 12, then, the water injection is stopped, then, the motor 41 is started to drive the stirring assembly to rotate at a high speed, the bamboo pulp 100 is pumped into the screen frame 20 through the pulp inlet pipeline, in the upward flowing process, under the stirring action of the multiple groups of blades 402 rotating at a high speed, the resistance for slowing down the flowing and the centrifugal force towards the outside of the screen frame 20 are received, the fine components in the bamboo pulp 100 rapidly enter the screening cavity 30 through the screen holes due to the short diameter or length, and the good pulp containing the long bamboo fibers is remained in the screen frame 20 due to the failure of the screen holes, and is delivered to the next process through the pulp outlet pipeline under the pulp pressure.

The bamboo pulp fiber screening plant that this embodiment provided is applicable to the industrialization and implements, can effectively screen the tiny component in the bamboo pulp, and then improves the cohesion between the fibre in the bamboo pulp household paper, overcomes the heavier problem of bamboo pulp household paper dust, in addition, also can show the quality that promotes bamboo fluff pulp.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.