Slurry feeding pretreatment device of screening machine

Abstract

The utility model discloses a pulp feeding pretreatment device of a screening machine, which belongs to the technical field of papermaking pulping equipment and comprises a shell, the shell comprises a pulp feeding area and a screening area, a screen cylinder is fixedly mounted in the shell, a rotor is coaxially mounted in the shell, a transmission shaft of the rotor penetrates through the pulp feeding area and the screening area, and the screen cylinder is fixedly mounted in the shell. A plurality of accelerating and homogenizing pieces are fixedly arranged on the end face of the rotor wing rotor, the ends of the accelerating and homogenizing pieces extend out of the periphery of the rotor wing rotor and extend to the position of the screen cylinder, and a screening channel communicated with the pulp inlet area is arranged between the rotor wing rotor and the screen cylinder; a heavy impurity collecting opening is formed in the position, corresponding to the accelerating material uniformizing piece, of the shell. The papermaking pulping device solves the technical problems of long pulp pretreatment period and low pulp production efficiency, 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 pulp pretreatment device for a screening machine. Background Art

[0002] At present, in order to meet the requirements of their own processing technology, industries such as pulp and paper making and wood-based panel manufacturing 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. The existing pulp contains many impurities and often needs to be left to stand for a long time to precipitate the heavy impurities before being pumped into the screening machine for screening. This leads to a long pulp pretreatment cycle, which seriously affects the production efficiency of the pulp.

[0003] Therefore, in the technical field of papermaking and pulping equipment, there is still a need for research and improvement on the pulp pretreatment device for the screening machine. This is also a research hotspot and focus in the current technical field of papermaking and pulping equipment, and it 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 slurry pretreatment device for a screening machine to solve the technical problems of long slurry pretreatment cycle and low slurry production efficiency.

[0005] To solve the above technical problems, the technical solution of the utility model is: a pulp pretreatment device for a screening machine, comprising a shell, the shell comprising a pulp feeding area and a screening area, a screen drum is fixedly installed at the screening area position in the shell, a rotor is coaxially installed in the shell, the transmission shaft of the rotor passes through the pulp feeding area and the screening area, a pulp inlet connected to the pulp feeding area is provided on the shell, a plurality of acceleration and leveling sheets are fixedly provided on the end face of the rotor, the ends of the acceleration and leveling sheets extend out of the outer periphery of the rotor rotor and extend to the screen drum position, a screening channel connected to the pulp feeding area is provided between the rotor rotor and the screen drum, a heavy impurity collection port is provided on the shell corresponding to the position of the acceleration and leveling sheet, and the pulp entry direction of the pulp inlet is along the tangent direction of the shell.

[0006] As an improvement, a plurality of accelerating shaving blades are arranged in a circular array on the end surface of the rotary-wing rotor.

[0007] As a further improvement, an extending direction of the accelerating material-leveling sheet forms an angle with a radial direction of the end surface of the rotor.

[0008] As a further improvement, an inclination angle is provided between the slurry-facing surface of the accelerating leveling piece and the end surface of the rotary wing rotor.

[0009] As another improvement, a jet water pipe connected to the slurry inlet area is provided on the shell.

[0010] As a further improvement, the jet direction of the jet water pipe is along the tangent direction of the shell.

[0011] After adopting the above technical solution, the beneficial effects of the utility model are:

[0012] In the embodiment of the utility model, an accelerating material leveling piece is arranged at the end of the rotary wing rotor. On the one hand, as the rotary wing rotor rotates, the slurry in the slurry inlet area is stirred, so that the slurry flow rate in the slurry inlet area is accelerated, thereby improving the screening efficiency. On the other hand, the accelerating material leveling piece stirs the slurry, causing the slurry to produce vortex, and the heavy impurities are separated at the periphery close to the shell under the action of centrifugal force, and can be collected into the heavy impurity storage tank through the heavy impurity collection port for storage, thereby reducing the amount of heavy impurities entering the screening area, and there is no need to stand and separate the heavy impurities, which greatly shortens the slurry pretreatment cycle and improves the pulping efficiency.

[0013] 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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.

[0015] 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.

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0017] Figure 2 It is a schematic diagram of the arrangement structure of the accelerating material leveling sheet in the embodiment of the utility model;

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the accelerating material leveling piece in the embodiment of the utility model;

[0019] In the figure: 1, shell, 101, slurry inlet area, 102, screening area, 2, screen drum, 3, rotor, 4, acceleration and material leveling sheet, 5, slurry inlet, 6, heavy impurity collection port, 7, jet water pipe. DETAILED DESCRIPTION

[0020] 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.

[0021] 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.

[0022] like Figure 1 As shown, the utility model provides a slurry pretreatment device for a screening machine, comprising a shell 1, the shell 1 comprising a slurry inlet area 101 and a screening area 102, a screen drum 2 is fixedly installed at the screening area 102 in the shell 1, a rotary wing rotor 3 is coaxially installed in the shell 1, a transmission shaft of the rotary wing rotor 3 passes through the slurry inlet area 101 and the screening area 102, a slurry inlet 5 connected to the slurry inlet area 101 is provided on the shell 1, and the slurry entering direction of the slurry inlet 5 is along the tangent direction of the shell 1, so that the slurry forms a vortex, as shown in FIG. Figure 2As shown, a plurality of accelerating material-splitting pieces 4 are fixedly provided on the end surface of the rotor 3, and a plurality of accelerating material-splitting pieces 4 are arranged in a ring array on the end surface of the rotor 3. The ends of the accelerating material-splitting pieces 4 extend out of the outer periphery of the rotor 3 and extend to the position of the screen drum 2. A screening channel connected to the pulp inlet area 101 is provided between the rotor 3 and the screen drum 2. The pulp enters the pulp inlet area 101 from the pulp inlet 5, and enters the screening area 102 through the screening channel under the action of pressure. The accelerating material-splitting pieces 4 extend out of the rotor 3 to cut the screening channel. A corresponding accelerating material-splitting piece 4 is provided on the housing 1. The heavy impurity collection port 6 and the accelerating leveling sheet 4, on the one hand, stir the slurry in the slurry inlet area 101 as the rotor 3 rotates, so that the slurry flow rate in the slurry inlet area 101 is accelerated, thereby improving the screening efficiency. On the other hand, the accelerating leveling sheet 4 stirs the slurry, causing the slurry to produce vortexes, and the heavy impurities are separated at the periphery close to the shell 1 under the action of centrifugal force, and can be collected into the heavy impurity storage tank through the heavy impurity collection port 6 for storage, thereby reducing the amount of heavy impurities entering the screening area 102, and there is no need to separate the heavy impurities by standing, which greatly shortens the slurry pretreatment cycle and improves the pulping efficiency.

[0023] An included angle is formed between the extension direction of the accelerating material-leveling piece 4 and the radial direction of the end face of the rotor 3, that is, the accelerating material-leveling piece 4 is arranged along the chord length direction, and an acute angle is formed between a line connecting the head end of the accelerating material-leveling piece 4 and the center of the end face of the rotor 3 and a line connecting the tail end of the accelerating material-leveling piece 4 and the center of the end face of the rotor 3.

[0024] like Figure 3 As shown, there is an inclination angle between the slurry-facing surface of the accelerating and leveling piece 4 and the end surface of the rotor 3, and the inclination angle is usually 75±5 degrees, so that the accelerating and leveling piece 4 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 and leveling piece 4.

[0025] A jet water pipe 7 connected to the slurry inlet area 101 is provided on the shell 1. The jet direction of the jet water pipe 7 is along the tangential direction of the shell 1. On the one hand, the jet water pipe 7 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.

[0026] In the embodiment of the utility model, the slurry enters the slurry inlet area 101 from the slurry inlet 5, and at the same time, the jet water pipe 7 injects dilution water to reduce the slurry concentration and improve the slurry fluidity. At this time, the rotor 3 drives the accelerating material leveling sheet 4 to cause the slurry to generate vortex, and the heavy impurities are separated at the periphery close to the shell 1 under the action of centrifugal force, and are collected in the heavy impurity storage tank through the heavy impurity collection port 6 for storage. The pretreated slurry enters the screening area 102 through the screening channel under the action of pressure. The utility model can directly process the slurry without the need to stand for a period of time before screening, which greatly shortens the slurry pretreatment cycle and improves the pulping efficiency.

[0027] 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 slurry pretreatment device for a screening machine, comprising a shell, the shell comprising a slurry feeding area and a screening area, a screen drum is fixedly installed at the screening area in the shell, a rotor is coaxially installed in the shell, a transmission shaft of the rotor passes through the slurry feeding area and the screening area, a slurry inlet connected to the slurry feeding area is provided on the shell, and the characteristics are as follows: A plurality of accelerating material-leveling pieces are fixedly arranged on the end surface of the rotary wing rotor, and the ends of the accelerating material-leveling pieces extend out of the outer periphery of the rotary wing rotor and extend to the screen drum position. A screening channel connected to the slurry inlet area is provided between the rotary wing rotor and the screen drum, and a heavy impurity collection port is provided on the shell corresponding to the position of the accelerating material-leveling piece, and the slurry entry direction of the slurry inlet is along the tangent direction of the shell.

2. The pulp pretreatment device for a screening machine according to claim 1, characterized in that: A plurality of accelerating shaving blades are arranged in a circular array on the end surface of the rotary wing rotor.

3. The pulp pretreatment device for a screening machine according to claim 1 or 2, characterized in that: An angle is formed between the extending direction of the accelerating material-leveling piece and the radial direction of the end surface of the rotor.

4. The pulp pretreatment device for a screening machine according to claim 3, characterized in that: An inclination angle is arranged between the slurry-confronting surface of the accelerating material-leveling piece and the end surface of the rotary-wing rotor.

5. The pulp pretreatment device for screening machine according to claim 1, characterized in that: The shell is provided with a jet water pipe connected with the pulp inlet area.

6. The pulp pretreatment device for a screening machine according to claim 5, characterized in that: The jet direction of the jet water pipe is along the tangent direction of the shell.

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