Tail slurry residue screening separator

Abstract

The utility model discloses a tail pulp residue screening separator, which belongs to the technical field of papermaking pulping equipment and comprises an axially and horizontally arranged casing, a pulp inlet area, a screening area and a residue discharge area are sequentially arranged in the casing, a screen cylinder is fixedly mounted at the position of the screening area in the casing, and a transmission shaft driven by a power device is rotatably mounted in the casing. The two ends of the transmission shaft penetrate out of the shell, bearing seats are installed at the ends of the transmission shaft, a slurry inlet is formed in the shell of the slurry inlet area, a defibering knife is fixedly installed on the transmission shaft located in the slurry inlet area, and a heavy impurity collecting opening is formed in the position, corresponding to the defibering knife, of the shell. A plurality of slag throwing blades are fixedly arranged on the end face, located in the slag discharging area, of the rotor body. A coarse slag collecting opening is formed in the position, corresponding to the slag throwing blade, of the shell, and a light slag collecting opening is formed in the position, opposite to the rotation center of the slag throwing blade, of the shell. The utility model solves the technical problem of low pulping efficiency caused by high impurity content in the pulp, and is widely applied to papermaking pulping.

Description

Technical Field

[0001] The utility model belongs to the technical field of papermaking pulping equipment, in particular to a tailing slag screening separator. Background Art

[0002] At present, in order to meet the requirements of their own processing technology, industries such as pulping and papermaking, wood-based panel manufacturing, etc. usually need to use screening machinery to process the purchased waste paper, wood chips, bamboo chips and other raw materials into pulp, and then use suitable pulp for production. Separator is one of the most commonly used screening equipment in the pulping and papermaking industry. Now most of the pulping in paper mills is completed through the coarse screening process and the fine screening process. The commonly used equipment is the vertical separator. The two ends of the rotor shaft are installed at the upper and lower ends of the shell through the bearing seat. Since the bearing seat is located in the shell, especially the lower bearing seat, it needs to be pressure-bearing and sealed. The bearing seat also needs to be lubricated and cooled in the shell, which is difficult to maintain. In addition, the existing slurry contains many impurities, which often clog the screen drum and wear the rotor during screening, and affect the slurry discharge efficiency. Therefore, it needs to stand for a long time to allow the heavy impurities to settle before pumping it into the separator for screening. After separation, the slurry still contains coarse slag and light slag. Common coarse slag includes impurities with high specific gravity such as sand, soil, gravel, nails, buttons, brick slag, etc., and common light slag includes impurities with light specific gravity such as plastic, foam, wet-strength paper, etc. After screening, the coarse slag and light slag are discharged at the same time. The existing method for separating coarse slag from light slag usually requires standing for a long time for the coarse slag to settle, and then using a mesh screen to screen out the light slag floating on the surface, which leads to a long slurry processing cycle and seriously affects the production efficiency of the slurry.

[0003] Therefore, in the technical field of papermaking and pulping equipment, there is still a need for research and improvement of tailings slag screening separators, which is also a research hotspot and focus in the current technical field of papermaking and pulping equipment, and is also the starting point for the completion of this utility model. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to provide a tailing slurry slag screening separator to solve the technical problem of low pulping efficiency caused by high impurity content in the slurry.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a tailing slurry slag screening separator, comprising an axially horizontally arranged shell, wherein the shell is provided with a slurry inlet area, a screening area and a slag discharge area in sequence, a screen drum is fixedly installed at the screening area position in the shell, a transmission shaft driven by a power device is rotatably installed in the shell, the transmission shaft is coaxially arranged with the shell, both ends of the transmission shaft pass through the shell and bearing seats are installed at the ends, a sealing filler is provided between the transmission shaft and the shell, a columnar rotor body is provided on the transmission shaft, and the outer peripheral surface of the rotor body is provided with at least one set of rotors, and the rotors include a plurality of protruding from the rotor body The wing seats are arranged in a staggered manner in the axial direction of the rotor body, and two adjacent wing seats are arranged in a staggered manner on the axial direction of the rotor body. The shell body is provided with a water inlet and a slurry outlet corresponding to the rotor wings. The shell body in the slurry inlet area is provided with a slurry inlet, and a deflaking knife is fixedly installed on the transmission shaft located in the slurry inlet area. A heavy impurity collection port is provided on the shell body corresponding to the position of the deflaking knife. The slurry inlet and the heavy impurity collection port are located on both sides of the shell body. A plurality of slag rejection blades are fixedly provided on the end face of the rotor body located in the slag discharge area. A coarse slag collection port is provided on the shell body corresponding to the position of the slag rejection blades, and a light slag collection port is provided on the shell body at a position relative to the rotation center of the slag rejection blades.

[0006] As an improvement, the outer peripheral surface of the rotor body is provided with several groups of rotor blades, the corresponding water inlet is located at the upstream position of the wing seat in the group of rotor blades close to the slurry inlet, and the corresponding slurry outlet is located at the relative position of the wing seat in the group of rotor blades away from the slurry inlet.

[0007] As a further improvement, the deflaking knife includes a plurality of blades in a circular array, and the ends of the blades extend to the screen drum position.

[0008] As a further improvement, the angle between the blade edge and the blade face of the blade is 75 degrees.

[0009] As a further improvement, a screen plate is provided between the deflaking knife and the rotor body.

[0010] As a further improvement, the shell of the slurry inlet area has a diameter that gradually increases in the direction away from the screening area, the deflaking knife is close to the end of the rotor body, and a light impurity collection port is provided on the shell of the slurry inlet area, and the light impurity collection port is close to the rotation center of the deflaking knife.

[0011] As a further improvement, a manhole for cleaning impurities is provided on the shell of the slurry inlet area.

[0012] As another improvement, the end of the slag removal blade extends out of the outer circumference of the rotor body and extends to the screen drum position.

[0013] As a further improvement, the cross-sectional shape of the slag-removing blade is rectangular, and the slag-removing blade extends radially along the end surface of the rotor body and has an arc shape.

[0014] After adopting the above technical solution, the beneficial effects of the utility model are:

[0015] Both ends of the transmission shaft of the utility model embodiment pass through the housing and bearing seats are installed at the ends. The bearing seats are arranged outside the housing, which solves the technical problem that the bearings of the vertical equipment are located in the housing, which makes maintenance difficult and expensive. It is easy to lubricate and cool, reduces the number of bearing maintenance times, and extends the service life of the bearings. A sealing filler is installed between the transmission shaft and the housing. Compared with traditional vertical equipment, only sealing fillers are required to achieve the sealing between the housing and the transmission shaft, without the need to meet the stringent sealing requirements of the bearing chamber, thereby reducing the equipment manufacturing requirements and further reducing the equipment manufacturing and maintenance costs. In addition, since a debonding knife is provided, on the one hand, the slurry in the slurry inlet zone is stirred as the transmission shaft rotates, so that the slurry flow rate in the slurry inlet zone is accelerated, thereby improving the screening efficiency. On the other hand, the debonding knife stirs the slurry, so that the slurry generates vortexes, and heavy impurities are separated under the action of centrifugal force. At the position of the outer periphery close to the shell, it can be collected into the heavy impurity storage tank through the heavy impurity collection port for storage, reducing the number of heavy impurities entering the screening area, and there is no need to stand still to separate the heavy impurities, which greatly shortens the pulp pretreatment cycle and improves the pulping efficiency. The deflaking knife can also deflake a larger area of ​​wet-strength paper into fibers, so that the wet-strength fibers entering the screening area are not easy to block the screen drum and are easily discharged with the pulp; and because the slag throwing blades are provided, the slag-containing slurry in the slag discharge area is stirred as the rotor body rotates, causing the slurry to generate vortexes, and the coarse slag is separated at the outer periphery close to the shell under the action of centrifugal force, and is collected into the coarse slag storage tank through the coarse slag collection port for storage, while the light slag is at the center of the vortex, and is discharged and collected from the light slag collection port close to the drive shaft as the vortex. The utility model does not need to stand still to separate the coarse slag and the light slag, which greatly shortens the post-processing cycle of the slag-containing slurry and improves the pulping efficiency.

[0016] Since the shell is provided with a light impurity collection port, the light impurities can be separated and collected at the center of the vortex, further improving the light impurity separation effect of the slurry before entering the screening area.

[0017] Since a screen plate is provided between the debonding knife and the rotor body, it can prevent larger impurities and large wet-strength paper sheets from entering the screening area, reducing the number of impurities clogging the screen drum and thereby improving pulp production efficiency.

[0018] Since the pulp inlet area is equipped with a debonding knife and the slag removal area is equipped with a slag removal blade, pulp pretreatment, screening and slag discharge are realized on one device. It has a simple structure, small footprint, fewer process flows, and a short pulp treatment cycle. It completely solves the problem of the vicious cycle of light impurities in traditional screening equipment and greatly shortens and simplifies the pulping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment in size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0021] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0022] Figure 2 It is a structural schematic diagram of the debonding knife in the embodiment of the utility model;

[0023] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of AA;

[0024] Figure 4 This is a schematic diagram of the structure of the slag-removing blade in the embodiment of the utility model;

[0025] In the figure: 1. shell, 101. slurry inlet, 102. heavy impurity collection port, 103. water inlet, 104. slurry outlet, 105. coarse slag collection port, 106. light slag collection port, 107. light impurity collection port, 108. impurity cleaning manhole, 2. screen drum, 3. transmission shaft, 4. rotor body, 5. wing seat, 6. bearing seat, 7. sealing packing, 8. de-escalating knife, 801. blade, 802. blade, 803. knife surface, 9. slag removal blade, 10. screen plate. DETAILED DESCRIPTION

[0026] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The terms such as "front", "back", "left", "right", "inside", "outside", "middle", etc. cited in this specification are only for the convenience of description and are not intended to limit the scope of application of the present invention. Changes or adjustments to their relative relationships shall be regarded as within the scope of application of the present invention without substantially changing the technical content.

[0028] like Figure 1 As shown, the utility model provides a tailing slurry screening and separation machine, including a shell 1 arranged axially and horizontally, and a slurry feeding area, a screening area and a slag discharge area are arranged in sequence in the shell 1. A screen drum 2 is fixedly installed at the screening area position in the shell 1, and the screen drum 2 can choose to use a hole screen or a slot screen to achieve coarse screening or fine screening of different slurries. Those skilled in the art can choose to use it according to their needs. A transmission shaft 3 driven by a power device is rotatably installed in the shell 1, and the transmission shaft 3 is coaxially arranged with the shell 1. The power device is usually a belt transmission device driven by a motor. This device is a common technology in the field and will not be described here. Both ends of the transmission shaft 3 pass through the shell 1 and bearing seats 6 are installed at the ends. The bearing seats 6 are arranged outside the shell 1, which solves the technical problem that the bearing of the vertical equipment is located in the shell 1, which makes maintenance difficult and the maintenance cost high. It is easy to lubricate and cool, reduces the number of bearing maintenance, and extends the service life of the bearing. A sealing filler 7 is provided between the transmission shaft 3 and the shell 1. Compared with the traditional vertical equipment , only sealing filler 7 is required to achieve the sealing between the shell 1 and the transmission shaft 3, and there is no need to meet the stringent sealing requirements of the bearing chamber, which reduces the equipment manufacturing requirements, and thus reduces the equipment manufacturing and maintenance costs. A columnar rotor body 4 is provided on the transmission shaft 3, and the outer peripheral surface of the rotor body 4 is provided with at least one set of rotors, and the rotors include a plurality of wing seats 5 protruding from the rotor body 4. Two adjacent wing seats 5 are staggered in the axial direction of the rotor body 4, which avoids the long residence time of impurities and the unsmooth slag discharge, and solves the problem that the impurities block the screen of the screen drum 2 and cause serious wear of the wing seats 5, and reduces the maintenance cost. The corresponding rotors on the shell 1 are provided with a water inlet 103 and a slurry outlet 104, and the water inlet 103 and the slurry outlet 104 are respectively located on both sides of the shell 1. The setting of the water inlet 103 realizes the dilution of the slurry screened at each stage, improves the speed of the tailings, and solves the problem of the tailings staying in the screening area. After multi-stage screening, slurries of different particle sizes can be obtained, and the separate storage of coarse slurry and refined slurry is realized. The outer circumference of the rotor body 4 is provided with a plurality of rotor blades, the corresponding water inlet 103 is located at the upstream position of the wing seat 5 in the rotor blade group close to the slurry inlet 101, and the corresponding slurry outlet 104 is located at the relative position of the wing seat 5 in the rotor blade group away from the slurry inlet 101. The plurality of rotor blades is provided, that is, the slurry separation stages are more, the slurry particle size is smaller as it goes downstream, and the slurry discharged from the slurry outlet 104 is finer.

[0029] A slurry inlet 101 is provided on the shell 1 of the slurry inlet. The slurry entering direction of the slurry inlet is along the tangential direction of the shell 1, so that the slurry forms a vortex. A deflaking knife 8 is fixedly installed on the transmission shaft 3 located in the slurry inlet area. The deflaking knife 8 can play a deflaking role and deflake a large number of wet-strength paper sheets into fine fibers, thereby preventing a large number of wet-strength paper sheets from entering the screening area and clogging the screen drum 2. A heavy impurity collection port 102 is provided on the shell 1 corresponding to the position of the deflaking knife 8. The slurry inlet 101 and the heavy impurity collection port 102 are located on both sides of the shell 1, such as Figure 2 and Figure 3 As shown, the debonding knife 8 includes a plurality of blades 801 in an annular array, the ends of the blades 801 extend to the screen drum 2, and the angle between the blade edge 802 and the blade surface 803 of the blade 801 is 75 degrees, and the inclination angle is usually 75±5 degrees, which not only has an accelerated stirring effect, but also has good debonding performance, and prolongs the service life of the blade 801. On the one hand, the debonding knife 8 stirs the slurry in the pulp inlet area with the rotation of the transmission shaft 3, so that the slurry flow rate in the pulp inlet area is accelerated, and the screening efficiency is improved. On the other hand, the debonding knife 8 stirs the slurry, so that the slurry generates eddy currents, and the heavy impurities are separated at the periphery near the shell 1 under the action of centrifugal force, and can be collected and stored in the heavy impurity storage tank through the heavy impurity collection port 102, reducing the number of heavy impurities entering the screening area, without having to stand and separate the heavy impurities, and the wet-strength paper sheets can be debonded into wet-strength fibers, avoiding the wet-strength paper sheets entering the knife screening area to block the screen drum 2, greatly shortening the pulp pretreatment cycle, and improving the pulping efficiency.

[0030] A sieve plate 10 is provided between the debonding knife 8 and the rotor body 4, and the transmission shaft 3 passes through the sieve plate 10. Similarly, the sieve plate 10 can also use a hole screen or a slot screen as needed, which can block impurities with larger particle sizes and wet-strength paper sheets with large areas from entering the screening area, thereby reducing the number of impurities clogging the screen drum 2, thereby improving the pulp production efficiency.

[0031] The diameter of the shell 1 in the slurry inlet area gradually increases in the direction away from the screening area, so that the vortex formed closer to the position of the defragmentation knife 8 is larger and the centrifugal force is greater, which facilitates the separation of heavy impurities. The defragmentation knife 8 is close to the end of the rotor body 4, and a light impurity collection port 107 is provided on the shell 1 in the slurry inlet area. The light impurity collection port 107 is close to the rotation center of the defragmentation knife 8. The light impurities are gathered at the vortex center of the vortex and can be discharged and collected from the light impurity collection port 107.

[0032] An impurity cleaning manhole 108 is provided on the shell 1 of the slurry inlet area. When a large amount of impurities are difficult to discharge, the machine can be stopped for maintenance, the impurity cleaning manhole 108 is opened, and the operator enters the slurry inlet area for cleaning.

[0033] A plurality of slag-removing blades 9 are fixedly arranged on the end surface of the rotor body 4 located in the slag discharge area. The ends of the slag-removing blades 9 extend out of the outer periphery of the rotor body 4 and extend to the position of the screen drum 2. A screening channel connected to the slag discharge area is provided between the rotor body 4 and the screen drum 2. The slag-containing slurry enters the slag discharge area from the screening area. As the rotor body 4 rotates, the slag-removing blades 9 extend out of the rotor body 4 to cut the screening channel. A coarse slag collecting port 105 is provided on the shell 1 corresponding to the position of the slag-removing blade 9. The slag discharge direction of the coarse slag collecting port 105 is arranged radially along the rotation direction of the slag-removing blade 9. The shell 1 is relatively located at the rotation center of the slag-removing blade 9. A light slag collecting port 106 is provided, and the slag discharge direction of the light slag collecting port 106 is axially arranged along the rotation direction of the slag rejecting blade 9. The slag rejecting blade 9 stirs the slag-containing slurry in the slag discharge area as the rotor body 4 rotates, causing the slurry to generate a vortex, and the coarse slag is separated under the action of centrifugal force, and can be collected into a coarse slag storage tank through the coarse slag collecting port 105 for storage, while the light slag is at the center of the vortex, and is discharged and collected from the light slag collecting port 106 near the transmission shaft 3 along with the vortex. The utility model does not need to be statically separated from the coarse slag and the light slag, which greatly shortens the later processing cycle of the slag-containing slurry and improves the pulping efficiency.

[0034] like Figure 4 As shown, a plurality of slag removal blades 9 are arranged in a circular array on the end face of the rotor body 4. The number of slag removal blades 9 can be set to different numbers according to the different end face diameters of the rotor body 4. The technicians in this field can set it by themselves and will not go into details here. The cross-sectional shape of the slag removal blades 9 is rectangular. The slag removal blades 9 extend radially along the rotor body 4 and are arc-shaped. Because the slag-containing slurry has poor fluidity, the arc-shaped slag removal blades 9 have a longer slurry-facing surface, which is more likely to generate vortices when rotating.

[0035] The slurry enters the slurry inlet 101 into the slurry inlet area. At this time, the transmission shaft 3 drives the deflaking knife 8 to generate a vortex in the slurry. The heavy impurities are separated at the periphery near the shell 1 under the action of centrifugal force, and are collected in the heavy impurity storage tank through the heavy impurity collection port 102 for storage. The light impurities are gathered at the vortex center of the vortex and can be discharged and collected from the light impurity collection port 107. The wet-strength paper sheets in the slurry are deflaked into wet-strength fibers by the deflaking knife 8. The pretreated slurry passes through the screen plate 10 under pressure, and then enters the screening area through the screening channel between the rotor body 4 and the screen drum 2. The slurry is screened between the wing seat 5 and the screen drum 2. Slurries of different particle sizes are The slurry is discharged from the corresponding slurry outlet 104. The upstream slurry outlet 104 discharges coarse slurry with a particle size between 1.2 mm and 2.5 mm. The slurry is finer as it goes downstream. The tail slurry outlet 104 discharges fine slurry with a particle size between 0.12 and 0.25. Then, the slag-containing slurry enters the slag discharge area from the screening area. At this time, the rotor body 4 drives the slag-removing blades 9 to generate a vortex in the slag-containing slurry. The coarse slag is separated at the periphery near the shell 1 under the action of centrifugal force and is collected in the coarse slag storage tank through the coarse slag collection port 105. The light slag is at the center of the vortex and is discharged and collected from the light slag collection port 106 near the transmission shaft 3 along with the vortex. The utility model realizes slurry pretreatment, screening and slag discharge on one device, has a simple structure, small footprint, fewer process flows, and a short slurry treatment cycle. It completely solves the problem of the vicious cycle of light impurities in traditional screening equipment and greatly shortens and simplifies the pulping process.

[0036] Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. A tailings slag screening separator, comprising a shell arranged axially and horizontally, wherein a slurry inlet area, a screening area and a slag discharge area are sequentially arranged in the shell, and a screen drum is fixedly installed in the screening area in the shell, characterized in that: A transmission shaft driven by a power device is rotatably installed in the shell, the transmission shaft is coaxially arranged with the shell, both ends of the transmission shaft pass through the shell and bearing seats are installed at the ends, a sealing filler is arranged between the transmission shaft and the shell, a columnar rotor body is provided on the transmission shaft, and at least one group of rotors is provided on the outer peripheral surface of the rotor body, the rotor includes a plurality of wing seats protruding from the rotor body, and two adjacent wing seats are staggered in the axial direction of the rotor body, a water inlet and a slurry outlet are provided on the shell corresponding to the rotor, a slurry inlet is provided on the shell of the slurry inlet area, a deflaking knife is fixedly installed on the transmission shaft located in the slurry inlet area, a heavy impurity collection port is provided on the shell corresponding to the position of the deflaking knife, the slurry inlet and the heavy impurity collection port are located on both sides of the shell, a plurality of slag rejection blades are fixedly provided on the end surface of the rotor body located in the slag discharge area, a coarse slag collection port is provided on the shell corresponding to the position of the slag rejection blade, and a light slag collection port is provided on the shell relative to the rotation center of the slag rejection blade.

2. The tailings slag screening separator according to claim 1, characterized in that: The outer circumferential surface of the rotor body is provided with a plurality of groups of rotor blades, the corresponding water inlet is located at the upstream position of the wing seat of the group of rotor blades close to the slurry inlet, and the corresponding slurry outlet is located at the relative position of the wing seat of the group of rotor blades away from the slurry inlet.

3. The tailings slag screening separator according to claim 1, characterized in that: The deflaking knife comprises a plurality of blades in a circular array, and the ends of the blades extend to the screen drum position.

4. The tailings slag screening separator according to claim 3, characterized in that: The angle between the blade edge and the blade face of the blade is 75 degrees.

5. The tailings slag screening separator according to claim 4, characterized in that: A screen plate is provided between the deflaking knife and the rotor body.

6. The tailings slurry screening separator according to claim 1, characterized in that: The shell of the slurry inlet area has a diameter that gradually increases in the direction away from the screening area. The deflaking knife is close to the end of the rotor body. A light impurity collection port is provided on the shell of the slurry inlet area, and the light impurity collection port is close to the rotation center of the deflaking knife.

7. The tailings slurry screening separator according to claim 1, characterized in that: The shell of the slurry inlet area is provided with a manhole for cleaning impurities.

8. The tailings slag screening separator according to claim 1, characterized in that: The end of the slag removal blade extends out of the outer circumference of the rotor body and extends to the screen drum position.

9. The tailings slag screening separator according to claim 8, characterized in that: The cross-sectional shape of the slag-sweeping blade is rectangular, and the slag-sweeping blade extends radially along the end surface of the rotor body and has an arc shape.

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