Screening separator

Abstract

The utility model discloses a screening separator, which belongs to the technical field of papermaking pulping equipment, and comprises a shell which is axially and horizontally arranged, a pulp inlet area, a screening area and a slag discharge area are sequentially arranged in the shell, a screen cylinder is fixedly mounted at the position of the screening area in the shell, and a transmission shaft driven by a power device is rotatably mounted in the shell. The two ends of the transmission shaft penetrate out of the shell, bearing seats are installed at the ends of the transmission shaft, a columnar rotor body is arranged on the transmission shaft, a slurry inlet is formed in the shell of the slurry inlet area, a plurality of accelerating refining pieces are fixedly arranged on the end face, located in the slurry inlet area, of the rotor body, and 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 problems of high maintenance cost, long slurry treatment period and low production efficiency of a screening separator, and is widely applied to papermaking and pulping.

Description

Technical Field

[0001] The utility model belongs to the technical field of papermaking and pulping equipment, in particular to a 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 lubrication and cooling in the shell, which is difficult to maintain. In addition, many pipelines are set from top to bottom in the shell. Once the lower parts need to be maintained, all the upper pipelines need to be removed before the shell can be disassembled, which is time-consuming and labor-intensive, and the maintenance cost is high. In addition, the existing slurry contains many impurities, and it often needs to stand for a long time for the heavy impurities to settle before it is pumped into the separator for screening. After the separation is completed, 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, 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 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 the present utility model. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to provide a screening separator to solve the technical problems of high maintenance cost, long slurry processing cycle and low production efficiency of the screening separator.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a screening separator, comprising a shell arranged axially and horizontally, wherein a pulp feeding area, a screening area and a slag discharge area are arranged in sequence in the shell, a screen drum is fixedly installed at the screening area 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 arranged between the transmission shaft and the shell, a columnar rotor body is arranged on the transmission shaft, and at least one set of rotors is arranged on the outer peripheral surface of the rotor body, and the rotors include a plurality of protruding The wing seat of the rotor body, two adjacent wing seats are staggered in the axial direction of the rotor body, the shell is provided with a water inlet and a slurry outlet corresponding to the rotor wings, the shell of the slurry inlet area is provided with a slurry inlet, the end face of the rotor body located in the slurry inlet area is fixedly provided with a plurality of accelerating material leveling pieces, the shell is provided with a heavy impurity collection port corresponding to the position of the accelerating material leveling piece, the end face of the rotor body located in the slag discharge area is fixedly provided with a plurality of slag rejection blades, the shell is provided with a coarse slag collection port corresponding to the position of the slag rejection blades, and the shell is provided with a light slag collection port 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 end of the accelerating screed extends out of the outer circumference of the rotor body and extends to the screen drum position.

[0008] As a further improvement, the cross-sectional shape of the accelerating material-leveling piece is rectangular, and an angle is formed between the extending direction of the accelerating material-leveling piece and the radial direction of the end face of the rotor body.

[0009] As a further improvement, an inclination angle is provided between the pulp facing surface of the accelerating material leveling piece and the end surface of the rotor body.

[0010] As a further improvement, a jet water pipe connected to the slurry inlet area is provided on the shell, and the jet direction of the jet water pipe is along the tangent direction of the shell.

[0011] As a further 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.

[0012] 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.

[0013] As another improvement, the shell includes an upper half and a lower half, the upper half and the lower half are connected by fasteners, and the slurry inlet, heavy impurity collection port, coarse slag collection port, light slag collection port, water inlet and slurry outlet are all arranged on the lower half.

[0014] As another improvement, the shell includes a left half, a right half and several intermediate bodies arranged along the axial direction, the intermediate body is located between the left half and the right half, the left half, the intermediate body and the right half are connected in sequence by fasteners, the slurry inlet and the heavy impurity collection port are arranged on the right half, the coarse slag collection port and the light slag collection port are arranged on the left half, and each group of the water inlet and the slurry outlet is correspondingly arranged on the corresponding intermediate body.

[0015] After adopting the above technical solution, the beneficial effects of the utility model are:

[0016] The two ends of the transmission shaft of the utility model embodiment pass through the housing and the ends are equipped with bearing seats. The bearing seats are arranged outside the housing, which solves the technical problem that the bearings of vertical equipment are located in the housing, resulting in great difficulty and high maintenance costs. It is easy to lubricate and cool, reduces the number of bearing maintenance times, and prolongs the service life of the bearings. A sealing filler is installed between the transmission shaft and the housing. Compared with traditional vertical equipment, only a sealing filler is required to achieve the seal between the housing and the transmission shaft, without meeting 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, due to the provision of an accelerating material leveling sheet, on the one hand, as the rotor body rotates, the slurry in the slurry inlet zone is stirred, so that the slurry flow rate in the slurry inlet zone is accelerated, thereby improving the screening efficiency. On the other hand, the accelerating material leveling sheet stirs The slurry is moved, so that the slurry generates an eddy current. Heavy impurities are separated at the periphery close to the shell under the action of centrifugal force, and can be collected into a heavy impurity storage tank through a heavy impurity collection port for storage, thereby reducing the number of heavy impurities entering the screening area. There is no need to statically separate the heavy impurities, which greatly shortens the slurry pretreatment cycle and improves the pulping efficiency. In addition, due to the provision of slag-removing blades, the slag-containing slurry in the slag discharge area is stirred as the rotor body rotates, so that the slurry generates an eddy current. Coarse slag is separated at the periphery close to the shell under the action of centrifugal force, and can be collected into a coarse slag storage tank through a coarse slag collection port for storage, while light slag is at the center of the eddy current and is discharged and collected from a light slag collection port close to the drive shaft as the eddy current flows. The utility model does not need to statically 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.

[0017] Since a jet water pipe connected to the slurry inlet area is provided on the shell, the jet water pipe provides jet water on the one hand to dilute the slurry, reduce the concentration of the slurry and improve the fluidity of the slurry. On the other hand, the jet water is injected tangentially, which causes the slurry to generate eddy flow and increase the flow rate, further improving the separation effect of heavy impurities.

[0018] Since the shell includes an upper body and a lower body, the slurry inlet, heavy impurity collection port, coarse slag collection port, light slag collection port, water inlet and slurry outlet are all arranged on the lower body, and the pipeline connections are all arranged on the lower body. During maintenance, the upper body can be easily opened to clean or replace the screen drum or wing seat, which reduces the labor intensity of the operator, saves maintenance time, and reduces maintenance costs.

[0019] Since the shell includes a left half body, a right half body and a plurality of intermediate bodies arranged along the axial direction, during maintenance, only the part that needs to be maintained is removed, and other parts do not need to be disassembled, which reduces the labor intensity of the operator, saves maintenance time and reduces maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] 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.

[0022] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model;

[0023] Figure 2 It is a schematic diagram of the arrangement of the accelerating material leveling sheet in the first embodiment of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the accelerating material leveling sheet in the first embodiment of the utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the slag-removing blade in the first embodiment of the utility model;

[0026] Figure 5 It is a structural schematic diagram of the second embodiment of the utility model;

[0027] Figure 6 It is a structural schematic diagram of the third embodiment of the utility model;

[0028] 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, lower body, 108, upper body, 109, right half, 110, left half, 111, intermediate body, 2, screen drum, 3, transmission shaft, 4, rotor body, 5, wing seat, 6, bearing seat, 7, sealing packing, 8, acceleration and leveling sheet, 9, slag removal blade, 10, jet water pipe. DETAILED DESCRIPTION

[0029] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand 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.

[0030] 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.

[0031] Embodiment 1:

[0032] like Figure 1As shown, the utility model provides a screening separator, including a shell 1 axially arranged horizontally, wherein a pulp feeding area, a screening area and a slag discharge area are sequentially arranged in the shell 1, a screen drum 2 is fixedly installed at the screening area position in the shell 1, a transmission shaft 3 driven by a power device is rotatably installed in the shell 1, the transmission shaft 3 is coaxially arranged with the shell 1, and the power device is usually a belt transmission device driven by a motor. This device is a common technology in the field and is not 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 bearings of the vertical equipment are located in the shell 1, which makes maintenance difficult and costly, is convenient for lubrication and cooling, reduces the number of bearing maintenance, and prolongs the service life of the bearings. A sealing filler 7 is provided between the transmission shaft 3 and the shell 1. Compared with the traditional vertical equipment, only the sealing filler 7 is required to achieve the sealing between the shell 1 and the transmission shaft 3 , without having to meet the stringent sealing requirements of the bearing chamber, reducing the equipment manufacturing requirements, and thus reducing the equipment manufacturing and maintenance costs. A columnar rotor body 4 is provided on the transmission shaft 3, and at least one set of rotors is provided on the outer circumferential surface of the rotor body 4. The rotors include a plurality of wing seats 5 protruding from the rotor body 4, and two adjacent wing seats 5 are staggered in the axial direction of the rotor body 4, thereby avoiding long residence time of impurities and unsmooth slag discharge, and solving the problem that impurities clog the screen of the screen drum 2 and cause serious wear of the wing seats 5, reducing maintenance costs. A water inlet 103 and a slurry outlet 104 are provided corresponding to the rotors on the shell 1, 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 advancing, 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.

[0033] The shell 1 of the slurry inlet area is provided with a slurry inlet 101, and the slurry entering direction of the slurry inlet is along the tangent direction of the shell 1, so that the slurry forms a vortex. The end surface of the rotor body 4 located in the slurry inlet area is fixedly provided with a plurality of accelerating material-splitting pieces 8, and the plurality of accelerating material-splitting pieces 8 are arranged in a ring array on the end surface of the rotor body 4, such as Figure 2 and Figure 3As shown, the end of the accelerating material leveling piece 8 extends out of the outer periphery of the rotor body 4 and extends to the position of the screen drum 2. The cross-sectional shape of the accelerating material leveling piece 8 is rectangular, and the extending direction of the accelerating material leveling piece 8 is provided with an angle with the radial direction of the end face of the rotor body 4, that is, the accelerating material leveling piece 8 is arranged along the chord length direction, and the line connecting the head end of the accelerating material leveling piece 8 and the center of the end face of the rotor body 4 and the line connecting the tail end of the accelerating material leveling piece 8 and the center of the end face of the rotor body 4 are acute angles. An inclination angle is provided between the slurry-facing surface of the accelerating material leveling piece 8 and the end face of the rotor body 4, and an inclination angle is provided between the slurry-facing surface of the accelerating material leveling piece 8 and the end face of the rotor body 4, and the inclination angle is generally 75±5 degrees, so that the accelerating material leveling piece 8 forms a slurry-facing surface and a back slurry surface, and the slurry-facing surface faces the screening channel, pushing the slurry to quickly enter the screening area, further improving the accelerating stirring effect of the accelerating material leveling piece 8. A heavy impurity collection port 102 is provided on the shell 1 at the position corresponding to the accelerating leveling piece 8. On the one hand, the accelerating leveling piece 8 stirs the slurry in the slurry inlet area as the rotor body 4 rotates, thereby accelerating the slurry flow rate in the slurry inlet area and improving the screening efficiency. On the other hand, the accelerating leveling piece 8 stirs the slurry, causing the slurry to produce vortexes. Heavy impurities are separated at the periphery near the shell 1 under the action of centrifugal force and can be collected through the heavy impurity collection port 102 and stored in the heavy impurity storage tank, reducing the number of heavy impurities entering the screening area without the need for static separation of heavy impurities, greatly shortening the slurry pretreatment cycle and improving the pulping efficiency.

[0034] A jet water pipe 10 connected to the slurry inlet area is provided on the shell 1. The jet direction of the jet water pipe 10 is along the tangential direction of the shell 1. On the one hand, the jet water pipe 10 provides jet water to dilute the slurry, reduce the concentration of the slurry, and improve the fluidity of the slurry. On the other hand, the jet water is injected along the tangential direction, so that the slurry generates eddy flow and the flow rate is increased, which further improves the separation effect of heavy impurities.

[0035] 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.

[0036] 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 larger slurry facing surface than the linear structure at the same rotation radius, and are more likely to generate vortices when rotating.

[0037] 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.

[0038] The slurry enters the slurry inlet 101 into the slurry inlet area, and at the same time, the jet water pipe 10 injects dilution water to reduce the slurry concentration and improve the slurry fluidity. At this time, the rotor body 4 drives the accelerating material-leveling sheet 8 to cause the slurry to generate vortex, and 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 pretreated slurry enters the screening area through the screening channel between the rotor body 4 and the screen drum 2 under the action of pressure, and the slurry is screened between the wing seat 5 and the screen drum 2. The slurry of different particle sizes is discharged from the corresponding slurry outlet 104, and the upstream The slurry outlet 104 discharges coarse slurry with a particle size between 1.2 mm and 2.5 mm. The slurry becomes finer as it goes downstream. The slurry outlet 104 at the tail end discharges refined 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 cause the slag-containing slurry to generate a vortex. 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 collecting port 105 for storage. The light slag is at the center of the vortex and is discharged and collected from the light slag collecting port 106 near the drive shaft 3 along with the vortex.

[0039] Embodiment 2:

[0040] The utility model provides a screening separator, the structure of which is basically the same as that of the first embodiment, except that Figure 5 As shown, the shell 1 includes an upper body 108 and a lower body 107, and the upper body 108 and the lower body 107 are connected by fasteners. The upper body 108 can be provided with an exhaust port, and the slurry inlet 101, the heavy impurity collection port 102, the coarse slag collection port 105, the light slag collection port 106, the water inlet 103 and the slurry outlet 104 are all arranged on the lower body 107, and the pipeline connections are all arranged on the lower body 107. During maintenance, the upper body 108 can be easily opened to clean or replace the screen drum 2 or the wing seat 5, which reduces the labor intensity of the operator, saves maintenance time, and reduces maintenance costs.

[0041] Embodiment three:

[0042] The utility model provides a screening separator, the structure of which is basically the same as that of the first embodiment, except that Figure 6As shown, the shell 1 includes a left half body 110, a right half body 109 and a plurality of intermediate bodies 111 arranged along the axial direction, the intermediate body 111 is located between the left half body 110 and the right half body 109, the left half body 110, the intermediate body 111 and the right half body 109 are connected in sequence by fasteners, the slurry inlet 101 and the heavy impurity collection port 102 are arranged on the right half body 109, the coarse slag collection port 105 and the light slag collection port 106 are arranged on the left half body 110, and each group of water inlet 103 and slurry outlet 104 are correspondingly arranged on the corresponding intermediate body 111. When this structure is maintained, the part that needs to be maintained can be dismantled, and the other parts do not need to be disassembled, which reduces the labor intensity of the operator, saves maintenance time, and reduces maintenance costs.

[0043] 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 screening separator, comprising a shell arranged axially and horizontally, wherein a pulp feeding 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, and 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, and a sealing filler is arranged between the transmission shaft and the shell, and 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, and 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, and a water inlet and a slurry outlet are provided on the shell corresponding to the rotor, and a slurry inlet is provided on the shell in the slurry inlet area, and a plurality of acceleration and slurry leveling sheets are fixedly provided on the end surface of the rotor body located in the slurry inlet area, and a heavy impurity collection port is provided on the shell corresponding to the position of the acceleration and slurry leveling sheet, and a plurality of slag removal blades are fixedly provided on the end surface of the rotor body located in the slag discharge area, and a coarse slag collection port is provided on the shell corresponding to the position of the slag removal blade, and a light slag collection port is provided on the shell relative to the rotation center of the slag removal blade.

2. The screening separator according to claim 1, characterized in that: The outer peripheral 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 screening separator according to claim 1, characterized in that: The end of the accelerating screed extends out of the outer circumference of the rotor body and extends to the screen drum position.

4. The screening separator according to claim 3, characterized in that: The cross-sectional shape of the accelerating material-splitting piece is rectangular, and an angle is formed between the extending direction of the accelerating material-splitting piece and the radial direction of the end surface of the rotor body.

5. The screening separator according to claim 4, characterized in that: An inclination angle is arranged between the pulp-facing surface of the accelerating material-leveling piece and the end surface of the rotor body.

6. The screening separator according to claim 1, characterized in that: The shell is provided with a jet water pipe connected to the slurry inlet area, and the jet direction of the jet water pipe is along the tangent direction of the shell.

7. The 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.

8. The screening separator according to claim 7, 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.

9. The screening separator according to any one of claims 1 to 8, characterized in that: The shell includes an upper half and a lower half, the upper half is connected to the lower half by fasteners, and the slurry inlet, heavy impurity collection port, coarse slag collection port, light slag collection port, water inlet and slurry outlet are all arranged on the lower half.

10. The screening separator according to any one of claims 1 to 8, characterized in that: The shell includes a left half, a right half and several intermediate bodies arranged along the axial direction, the intermediate body is located between the left half and the right half, the left half, the intermediate and the right half are connected in sequence by fasteners, the slurry inlet and the heavy impurity collection port are arranged on the right half, the coarse slag collection port and the light slag collection port are arranged on the left half, and each group of the water inlet and the slurry outlet is correspondingly arranged on the corresponding intermediate body.

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