CN212052091U - Bleaching processing mechanism of kraft liner board paper production - Google Patents

Abstract

The utility model provides a bleaching processing mechanism for producing kraft liner board paper, which solves the problems of lagging brightness adjustment in kraft liner board paper production and the like, the tailing collecting mechanism is connected with a storage box through a pulp conveying pipe, the storage box is communicated with a fine dried noodle pulp tank through the pulp conveying pipe, a pulp pump and a flowmeter are installed on the pulp conveying pipe between the storage box and the fine dried noodle pulp tank, the tailing collecting mechanism comprises a collecting barrel, a collecting opening is installed at the upper end of the collecting barrel, a cover cap is arranged at the center of the inner portion of the collecting barrel, a flow guide channel is formed between the cover cap and the inner side of the collecting barrel, an opening and closing valve is installed below the collecting barrel, a pulp collecting cavity is formed in the opening and closing valve, a rotating column is installed in the middle of the pulp collecting cavity in a rotating mode, a plurality of valve openings are formed in the side face of the rotating column, and a rotating hand wheel connected with one end of the. The utility model has the advantages of low production cost, timely brightness adjustment and the like.

Description

Bleaching processing mechanism of kraft liner board paper production

Technical Field

The utility model belongs to the technical field of papermaking equipment, concretely relates to bleaching processing agency of kraft liner board paper production.

Background

The kraft liner board is also called kraft liner board or top hanging board. The brown kraft liner board paper and the light-colored kraft liner board paper are divided. Compared with the common box paperboard, the box paperboard is tougher and stiffer, has extremely high compressive strength, puncture resistance strength and folding resistance, has the characteristics of good moisture resistance, good appearance quality and the like, and is mainly used for manufacturing foreign trade packaging cartons and domestic high-grade commodity packaging cartons. In the paper industry, the color of kraft liner board paper cannot achieve the expected effect only by raw materials because a large paper machine increases waste paper fine dried noodles along with the reduction of wood pulp in the surface pulp, the requirement of the packaging industry on the appearance color of packaging raw paper kraft liner board paper is higher and higher along with the improvement of living standard, and the color of kraft liner board paper naturally becomes an important technical index (L, A, B).

Modern large paper machines are mostly dyed in pulp, one or more pigments are added into the pulp, and the pulp is usually dyed by using red, yellow and blue trichromatic dyes, so that the trichromatic dyes can selectively absorb part of visible light and reflect required color spectrum, the pigments are continuously and stably added into the pulp by configuring a precise metering conveying system, and meanwhile, an advanced online color automatic detection monitoring system is matched to monitor the change of the kraft liner paper L, A, B value. The A, B value can meet the technical requirements by matching red, yellow and blue colors for dyeing, but the L value (brightness) is too low, and the red, yellow and blue colors cannot be used for toning, so that the L value (brightness) of the raw materials needs to be improved by adding a bleaching agent in the cracking process to achieve the technical index of the color of the kraft liner board paper and improve the production cost depending on the L value (brightness) of the raw materials. In addition, the pulping process is long, so that the reaction is delayed until the papermaking forming detection, the brightness adjustment is not timely, and the color index is influenced.

In order to solve the defects of the prior art, people have long searched for and put forward various solutions. For example, chinese patent literature discloses a high-strength kraft liner board and a method of manufacturing the same [201720964916.8], which includes a face layer, a core layer, and a bottom layer, wherein a face pulp raw material of the face layer is composed of the following raw materials in parts by weight: 20-70 parts of bleached wood pulp, 30-80 parts of natural color wood pulp and 30-70 parts of short fiber waste paper pulp; the core slurry raw material of the core layer and the bottom slurry raw material of the bottom layer are composed of the following raw materials in parts by weight: 50-100 parts of imported waste paper and 0-50 parts of domestic waste paper.

The scheme solves the problem of high production cost of the kraft board paper to a certain extent, but the scheme still has a plurality of defects, such as the problem of brightness adjustment lag and the like.

Disclosure of Invention

The utility model aims at the above problem, provide a reasonable in design, the quick bleaching processing agency of kraft liner cardboard paper production of adjustting of lighteness.

In order to achieve the above purpose, the utility model adopts the following technical proposal: the bleaching processing mechanism comprises a tailing collecting mechanism arranged at the bottom of a flotation tank of a combined pulping white line, wherein the tailing collecting mechanism is connected with a storage tank through a pulp conveying pipe, the storage tank is communicated with a fine dried noodle pulp tank through the pulp conveying pipe, a pulp pump and a flowmeter are arranged on the pulp conveying pipe between the storage tank and the fine dried noodle pulp tank, the tailing collecting mechanism comprises a collecting cylinder opposite to the bottom of the flotation tank, an outward-expanding collecting opening is arranged at the upper end of the collecting cylinder, a cover cap is arranged at the center inside the collecting cylinder, a flow guide channel is arranged between the cover cap and the inner side of the collecting cylinder for bending, an opening and closing valve communicated with the flow guide channel is arranged below the collecting cylinder, a pulp collecting cavity is arranged inside the opening and closing valve, a rotating column for separating the pulp collecting cavity from the pulp collecting cavity is rotatably arranged in the middle of the pulp collecting cavity, a valve hole for communicating the pulp collecting cavity from the upper side to the lower side of the rotating column is formed in the side. The tailings in the flotation tank for collecting the combined pulping white line are stored in the storage box and then are conveyed to the fine dried noodle pulp tank, so that the bleaching process is simplified, and the pulp brightness adjusting rate in the fine dried noodle pulp tank is accelerated.

In the bleaching processing mechanism for producing the kraft liner board paper, the storage box comprises a box body and a stirring mechanism arranged at the center of the lower end of the box body, and the lower end of the box body is sequentially connected with a pulp pump and a flowmeter through a pulp conveying pipe and then is led into a fine dried noodle pulp pond. The stirring mechanism is arranged in the box body, so that tailings stored in the storage box are uniformly stirred, and the bleaching effect caused by deposition is prevented from being reduced.

In the bleaching processing agency of foretell kraft liner board paper production, rabbling mechanism is connected with the transmission shaft including setting up the driving motor in the bottom half, driving motor's output, and the transmission shaft is erect on the box center axis and from up being connected with a plurality of swivel becket through the connecting rod down, is connected with the stirring strip of a plurality of spiral settings between the swivel becket. The driving motor improves and gives the transmission shaft rotating force, and the stirring strip rotates spirally relative to the central axis of the rotating shaft.

In the bleaching processing mechanism for producing the kraft liner board, the upper end of the box body is sealed by a hemispherical cover.

In the bleaching processing mechanism for producing the kraft liner board, one side of the upper end of the box body is provided with a feed inlet communicated with the stirring cavity in the box body, the top end of the box body is provided with a grouting hole communicated with the tailing collecting mechanism, and the bottom of the box body is provided with a pulp discharging hole communicated with a pulp pump. Bleaching agent is added into the box body through the feed inlet, so that the bleaching quality is further improved.

In the bleaching processing mechanism for producing the kraft liner board, a liquid level meter is arranged in the box body. The liquid level meter detects the amount of tailings in the box body in time, and the tailings collecting mechanism is closed in time to avoid full load.

In the bleaching processing mechanism for producing the kraft liner board, a sealing mechanism is arranged at the joint of the collecting cylinder and the opening and closing valve. The sealing mechanism improves the connection sealing performance of the collecting cylinder and the opening and closing valve and avoids the opening and closing valve from separating from the lower end of the collecting cylinder.

In the bleaching processing mechanism of foretell kraft liner board paper production, sealing mechanism is including setting up the screw thread sand grip at water conservancy diversion passageway lower extreme and setting up the screw thread groove in the inboard of opening and closing valve upper end feed liquor hole, and the screw thread sand grip is the triangle-shaped and just fills with sealing silica gel between the screw thread groove. Threaded connection has better connection fastening nature, and the sealed silica gel of packing between gap wherein avoids the moisture seepage.

In the bleaching processing mechanism for producing the kraft liner board, the bending part in the flow guide channel is provided with the flow guide block, and one surface of the flow guide block, which is opposite to the flow guide channel, is an arc surface. The guide block guides the bent guide channel to convey the tailings, so that the tailings are prevented from flowing back.

In the bleaching processing mechanism for producing the kraft liner board, the outer side of the rotating hand wheel is coated with an anti-skid wear-resistant layer. The hand wheel is rotated to control the on-off of the on-off valve, so that the storage box is ensured to be in normal capacity.

Compared with the prior art, the utility model has the advantages of: the tailings generated by the combined pulping white line are collected in time to the storage tank and are conveyed to the fine dried noodle pulp tank through the pulp pump, so that the bleaching process is simplified, and the brightness adjusting speed is improved; tailings at the bottom of the flotation tank are recycled, so that the production cost is reduced; the stirring mechanism is arranged in the storage box, and meanwhile, the bleaching agent can be added from the feed inlet, so that the stability of bleaching quality is ensured.

Drawings

Fig. 1 is a block diagram of the present invention;

FIG. 2 is a schematic structural view of the tailings collection mechanism of the present invention;

FIG. 3 is a schematic sectional view of the opening/closing valve of the present invention;

fig. 4 is a schematic structural view of the sealing mechanism of the present invention;

fig. 5 is a schematic structural view of the rotating hand wheel of the present invention;

fig. 6 is a schematic structural diagram of the storage box of the present invention;

fig. 7 is a schematic structural diagram of the stirring mechanism of the present invention;

in the figure, a flotation tank 1, a tailings collection mechanism 2, a slurry conveying pipe 3, a slurry pump 31, a flow meter 32, a storage tank 4, a box body 41, a sealing cover 42, a stirring cavity 43, a feed inlet 44, a slurry injection hole 45, a slurry discharge hole 46, a liquid level meter 47, a fine dried noodle slurry pool 5, a collection cylinder 6, a collection port 61, a cover cap 62, a flow guide channel 63, a flow guide block 64, an opening and closing valve 7, a slurry collection cavity body 71, a rotating column 72, a valve hole 73, a rotating hand wheel 74, a liquid inlet hole 75, an anti-skid wear-resistant layer 76, a stirring mechanism 8, a driving motor 81, a transmission shaft 82, a connecting rod 83, a rotating ring 84, a stirring strip 85, a sealing mechanism 9, a threaded convex strip 91, a threaded groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-7, the bleaching processing mechanism for kraft liner board paper production comprises a tailings collecting mechanism 2 installed at the bottom of a flotation tank 1 for combined pulping white line, the tailings collecting mechanism 2 is connected with a storage tank 4 through a pulp conveying pipe 3, the storage tank 4 is communicated with a fine dried noodle pulp tank 5 through the pulp conveying pipe 3, a pulp pump 31 and a flow meter 32 are installed on the pulp conveying pipe 3 between the storage tank 4 and the fine dried noodle pulp tank 5, the tailings collecting mechanism 2 comprises a collecting cylinder 6 opposite to the bottom of the flotation tank 1, an outward-expanding collecting port 61 is installed at the upper end of the collecting cylinder 6, a cap 62 is installed at the center inside of the collecting cylinder 6, a flow guide channel 63 is arranged between the cap 62 and the inner side of the collecting cylinder 6 in a bending manner, an open-close valve 7 communicated with the flow guide channel 63 is installed below the collecting cylinder 6, a pulp collecting cavity 71 is installed inside the collecting cavity 71, a rotating column 72 for vertically separating the pulp collecting cavity 71 is rotatably installed in the middle, the side of the rotary column 72 is provided with a plurality of valve holes 73 communicating the upper and lower parts of the slurry collecting cavity 71, and the outer side of the opening and closing valve 7 is provided with a rotary hand wheel 74 connected with one end of the rotary column 72. The tailings collection mechanism 2 collects the bottom slag in the flotation tank 1 of the combined pulping white line into the storage tank 4, the bottom slag can not be reused as a white line raw material, the bottom slag is added into the fine dried noodle pulp tank 5, a bleaching product is replaced, labor and production cost are reduced, and meanwhile the brightness of the paper pulp in the fine dried noodle pulp tank 5 can be quickly adjusted.

Specifically, the storage box 4 includes a box body 41 and a stirring mechanism 8 installed at the center of the lower end of the box body 41. The box body 41 is used for storing the bottom slag collected by the tailings collecting mechanism 2, and the internal stirring mechanism 8 ensures that the bottom slag is in a flowing state, so that the blockage of the slurry conveying pipe 3 caused by the deposition of suspended substances is avoided.

Deeply, the stirring mechanism 8 comprises a driving motor 81 arranged at the bottom of the box 41, the output end of the driving motor 81 is connected with a transmission shaft 82, the transmission shaft 82 is erected on the central axis of the box 41 and is connected with a plurality of rotating rings 84 through a connecting rod 83 from bottom to top, and a plurality of spirally arranged stirring strips 85 are connected between the rotating rings 84. The transmission shaft 82 rotates to drive the stirring bar 85 fixed on the rotating ring 84 to rotate spirally relative to the transmission shaft 82, and the stirring bar 85 keeps the slurry stored in the box body 41 flowing and the suspended substances in the slurry uniformly distributed.

Further, the upper end of the case 41 is sealed by a hemispherical cover 42. The bulb-shaped cover 42 has a larger volume and holds more primer.

Furthermore, a charging opening 44 communicated with a stirring cavity 43 inside the box body 41 is formed at one side of the upper end of the box body 41, a grouting hole 45 communicated with the tailings collecting mechanism 2 is formed at the top end of the box body 41, and a slurry discharging hole 46 communicated with the slurry pump 31 is formed at the bottom of the box body 41. The box body 41 is provided with a feed inlet 44, and bleaching agent is added according to actual needs, so that the brightness of the paper pulp in the fine dried noodle pulp tank 5 is further improved.

In addition, a liquid level meter 47 is provided in the tank 41. The liquid level meter 47 monitors the liquid level in the tank 41 in time, and when the bed material in the tank 41 is excessive, the on-off valve 7 is closed to stop the feeding.

Meanwhile, a sealing mechanism 9 is provided at the junction of the collection cylinder 6 and the opening and closing valve 7. The sealing mechanism 9 connects the collection cylinder 6 with the on-off valve 7 and ensures that liquid does not leak.

The sealing mechanism 9 includes a threaded protrusion 91 disposed at the lower end of the flow guide channel 63 and a threaded groove 92 disposed inside the liquid inlet hole 75 at the upper end of the on-off valve 7, and the threaded protrusion 91 is triangular and the space between the threaded groove 92 and the threaded protrusion 91 is filled with sealing silica gel 93. The thread raised strips 91 in the sealing mechanism 9 are in threaded connection with the thread grooves 92, and the sealing silica gel 93 in the sealing mechanism fills the gaps between the thread raised strips and the thread grooves, so that the sealing performance is further improved.

Preferably, a flow guide block 64 is arranged at the inner bending part of the flow guide channel 63, and one surface of the flow guide block 64 opposite to the flow guide channel 63 is an arc surface. The guide block 64 guides the bed material to flow in the guide passage 63, and the bent structure prevents the bed material from flowing back when the bed material flows into the storage box 4 along the guide passage 63.

Obviously, the outside of the rotating hand wheel 74 is coated with an anti-skid wear layer 76. The rotating hand wheel 74 is manually adjusted by an operator to rotate the rotating column 72, so that whether the valve hole 73 is communicated with the upper part and the lower part of the slurry collecting cavity 71 or not is controlled.

In summary, the principle of the present embodiment is: the bottom material of the flotation tank 1 of the combined pulping white line is fully collected through the tailing collecting mechanism 2, is recycled into the storage tank 4, is input into the fine dried noodle pulp tank 5 under the driving of the pulp pump 31, and the input quantity is monitored by the flowmeter 32 to replace the bleaching material of the paper pulp in the fine dried noodle pulp tank 5, so that the production cost is reduced, the bleaching process is simplified, and the problem of the color technical index of the kraft liner paper caused by the hysteresis quality of a bleaching product is solved.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although terms such as the flotation tank 1, the tailings collection mechanism 2, the slurry conveying pipe 3, the slurry pump 31, the flow meter 32, the storage tank 4, the tank body 41, the cover 42, the stirring chamber 43, the feed port 44, the slurry injection hole 45, the slurry discharge hole 46, the level gauge 47, the noodle slurry tank 5, the collection cylinder 6, the collection port 61, the cap 62, the diversion channel 63, the diversion block 64, the opening and closing valve 7, the slurry collection chamber 71, the rotating column 72, the valve hole 73, the rotating hand wheel 74, the liquid inlet hole 75, the anti-slip wear layer 76, the stirring mechanism 8, the driving motor 81, the transmission shaft 82, the connecting rod 83, the rotating ring 84, the stirring bar 85, the sealing mechanism 9, the threaded convex strip 91, the threaded groove 92, and the sealing silica gel 93 are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims (10)

1. The utility model provides a bleaching processing agency of kraft liner board paper production, its characterized in that, collects mechanism (2) including the tailings of installing in flotation cell (1) bottom of joint slurrying white line, tailings collect mechanism (2) and be connected with storage box (4) through defeated thick liquid pipe (3), storage box (4) through defeated thick liquid pipe (3) and vermicelli thick liquid pond (5) intercommunication, storage box (4) and vermicelli thick liquid pond (5) between defeated thick liquid pipe (3) on install thick liquid pump (31) and flowmeter (32), tailings collection mechanism (2) include with flotation cell (1) bottom relative collection tube (6), collection tube (6) upper end install outer collection mouth (61) that expands, collection tube (6) inside center be equipped with block (62), block (62) and collection tube (6) inboard between for the water conservancy diversion passageway (63) that buckle and set up, the collecting cylinder (6) below install and open and close valve (7) with water conservancy diversion passageway (63) intercommunication, open and close valve (7) inside for album thick liquid cavity (71), collection thick liquid cavity (71) middle part rotate and install rotation post (72) that cut off from top to bottom album thick liquid cavity (71), rotation post (72) side open have a plurality of with album thick liquid cavity (71) valve hole (73) that communicate from top to bottom, open and close valve (7) outside install with rotate the rotation hand wheel (74) that post (72) one end is connected.

2. The bleaching mechanism for kraft board production according to claim 1, wherein the storage tank (4) comprises a tank body (41) and a stirring mechanism (8) installed at the center of the lower end of the tank body (41).

3. The bleaching processing mechanism of kraft cardboard paper production of claim 2, characterized in that rabbling mechanism (8) including set up driving motor (81) in box (41) bottom, the output of driving motor (81) be connected with transmission shaft (82), transmission shaft (82) erect on box (41) center axis and from down up be connected with a plurality of rotating ring (84) through connecting rod (83), rotating ring (84) between be connected with a plurality of spiral arrangement's stirring strip (85).

4. The bleaching mechanism for kraft board production according to claim 2, wherein the upper end of the housing (41) is sealed by a hemispherical cover (42).

5. The bleaching mechanism for producing the kraft liner board according to claim 2, wherein a feed inlet (44) communicated with a stirring chamber (43) inside the case (41) is formed in one side of the upper end of the case (41), a grouting hole (45) communicated with the tailings collection mechanism (2) is formed in the top end of the case (41), and a slurry discharge hole (46) communicated with the slurry pump (31) is formed in the bottom of the case (41).

6. The bleaching mechanism for kraft board production according to claim 2, wherein a level gauge (47) is disposed in the tank (41).

7. The bleaching mechanism for kraft board production according to claim 1, wherein a sealing mechanism (9) is provided at a junction of the collecting cylinder (6) and the opening and closing valve (7).

8. The bleaching mechanism for kraft liner board production according to claim 7, wherein the sealing mechanism (9) comprises a thread rib (91) disposed at the lower end of the flow guide channel (63) and a thread groove (92) disposed inside the liquid inlet hole (75) at the upper end of the open/close valve (7), the thread rib (91) is triangular and a sealing silica gel (93) is filled between the thread groove (92) and the thread rib (91).

9. The bleaching mechanism for producing the kraft liner board paper according to claim 1, wherein a flow guide block (64) is arranged at the inner bending part of the flow guide channel (63), and one surface of the flow guide block (64) opposite to the flow guide channel (63) is an arc surface.

10. The bleaching mechanism for producing kraft liner board according to claim 1, wherein the outer side of the rotating handwheel (74) is coated with an anti-slip wear-resistant layer (76).

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