CN212077482U

CN212077482U - Pre-dewatering screen frame for plug screw

Info

Publication number: CN212077482U
Application number: CN202020612011.6U
Authority: CN
Inventors: 刘建涛; 刘建坡; 赵永超
Original assignee: Zhengzhou Leizhan Technology Paper Machinery Co Ltd
Current assignee: Zhengzhou Leizhan Technology Paper Machinery Co Ltd
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2020-12-04
Anticipated expiration: 2030-04-22

Abstract

The utility model discloses a material stopper spiral is with sieve frame that dewaters in advance, including a sieve section of thick bamboo, a sieve section of thick bamboo presents the cone structure that the import is big, the export is little, and sieve section of thick bamboo surface distribution has the sieve mesh, arranges at a sieve section of thick bamboo inside wall simultaneously and is equipped with the wedge groove, and the wedge groove is arranged along the warp direction of a sieve section of thick bamboo, and the straight flange in wedge groove is relative with the direction of motion of thick liquids. The utility model is suitable for a material stopper screw equipment of heat dispersion system can make the recovery paper pulp thick liquids of high concentration, before getting into the heat dispersion machine, carries out dehydration in advance.

Description

Pre-dewatering screen frame for plug screw

Technical Field

The utility model relates to an equipment that gluing thing among the recovery paper pulp fibre is miniaturized, dispersion treatment, concretely relates to material stopper spiral is with dehydration reel in advance.

Background

In the process of recycling waste paper fibers, because the sources of raw materials are various and the production process is non-closed, the pulp after being disintegrated is doped with a large amount of glue, plastics, ink and other foreign fibers entering the system, and the foreign fibers are collectively called "stickies" in the papermaking process. If the sizing agent is not screened and removed, the sizing agent can form small and large spots on the surface of finished paper in the subsequent paper forming process, and the paper forming effect is greatly influenced.

With the development of the technology, in the process of the modern papermaking technology, the adhesive can be finely peeled through a heat dispersion machine so as to meet the requirements of the subsequent screening and removing technology. The heat dispersion machine mainly pushes high-concentration slurry to a dispersion area through a conveying screw arranged on the heat dispersion machine. The shell of the dispersion area is fixed with a fixed disc, and a movable disc capable of rotating at a high speed is arranged opposite to the fixed disc. The fixed disc and the movable disc are provided with a plurality of dispersed teeth which are mutually meshed in a staggered way. The gap between the dispersing teeth is kept between 0.2 mm and 0.5 mm.

When the motor drives the movable disc to rotate at a high speed, the high-concentration slurry is subjected to uniform mechanical action under the strong action of the dispersing teeth. The stickies mixed on the fibers are rapidly refined to particles invisible to naked eyes by means of friction between the fibers, and are uniformly dispersed in the slurry.

In order to ensure that sufficient friction can be generated between the fibers in the pulp, the pulp concentration needs to be increased by the press screw, but the pulp concentration can be increased from 10% to 25-30% from the press screw, which is far from sufficient for heat dispersion, so that poor heat dispersion performance due to too low a pulp concentration frequently occurs.

Utility model patent of publication number CN208649780U discloses a heat dispersion device relates to papermaking heat dispersion technical field, and its technical scheme's main points are: the system comprises a thickener, a heat dispersion machine and a pulp storage pool, and also comprises a conveying screw, a press screw machine, a material plug screw, a crushing screw and a heating screw, wherein the input end of the conveying screw is connected with the output end of the thickener, the input end of the press screw machine is connected with the output end of the conveying screw, the input end of the material plug screw is connected with the output end of the press screw machine, the input end of the crushing screw is connected with the output end of the material plug screw, the input end of the heating screw is connected with the output end of the crushing screw, the output end of the heating screw is connected with the input end of the heat dispersion machine, and the output end of the heat; through set up again between concentrated machine and heat dispersion machine and squeeze screw and a plurality of device that act on the spiral in order to handle large granule impurity, the large granule impurity in the thick liquids that can significantly reduce is favorable to improving the paper stock quality that thick liquids were made.

Although the material plug screw is disclosed in the above-mentioned published scheme, the structure of the material plug screw is lagged behind, so that the concentration of the treated slurry is still difficult to meet the requirement, and the use of the subsequent heat dispersion machine is greatly influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the weak point among the prior art, provide a material stopper spiral is with dehydration reel in advance, can make thick liquids carry out further dehydration operation in transportation process through this reel structure.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides a material stopper spiral is with sieve frame that dewaters in advance, includes a sieve section of thick bamboo, and a sieve section of thick bamboo presents the big, little awl section of thick bamboo structure of export of import, and a sieve section of thick bamboo surface distribution has the sieve mesh, arranges at a sieve section of thick bamboo inside wall simultaneously and is equipped with the wedge groove, and the wedge groove is arranged along the warp direction of a sieve section of thick bamboo, and the straight flange of wedge groove is relative with the direction of motion of thick liquids.

The sieve mesh is of a stepped hole structure, one end of the sieve mesh, which is positioned on the inner side wall of the sieve cylinder, is a small hole, and the other end of the sieve mesh, which is positioned on the outer side wall of the sieve cylinder, is a large hole.

The inlet of the screen drum is provided with a feed end flange, and the outlet of the screen drum is provided with a discharge end flange.

The outside of a sieve section of thick bamboo is provided with the beaded finish along axial arrangement.

The material plug screw shaft of the material plug screw is arranged in the screen cylinder in an extending mode along the central axis of the screen cylinder, the material plug screw shaft is provided with material plug screw blades matched with the screen cylinder, and the material plug screw blades are also of a conical structure.

The utility model has the advantages that:

the utility model is suitable for a material stopper screw equipment of heat dispersion system can make the recovery paper pulp thick liquids of high concentration, before getting into the heat dispersion machine, carries out dehydration in advance.

The utility model discloses set up a sieve section of thick bamboo outside the material stopper screw axis of material stopper spiral, a sieve section of thick bamboo presents the big, little awl section of thick bamboo structure of export of import, and inside thick liquids entered into a sieve section of thick bamboo, when material stopper screw axis rotated, high enriched thick liquids can be promoted forward. In the pushing process, the clearance between the plug screw shaft and the screen cylinder is continuously reduced, the moisture contained in the high-concentration slurry is slowly discharged, and the concentration of the high-concentration slurry is further increased to 35-40%.

The utility model discloses arranging at 3 inside walls of a sieve section of thick bamboo and being equipped with the wedge groove, the wedge groove is certain contained angle with a sieve section of thick bamboo inner wall, and the wedge groove is arranged along the warp direction of a sieve section of thick bamboo, and the straight flange in wedge groove is relative with the direction of motion of thick liquids. When the plug screw shaft rotates, the rotating direction of the plug screw shaft is opposite to the wedge-shaped groove, so that the friction force between the pulp and the screen frame can be greatly enhanced, the dewatering capacity of the screen frame is greatly improved, and the fiber bundles are prevented from being lapped and agglomerated.

The utility model discloses well sieve mesh is the shoulder hole structure, and its one end that is located a sieve section of thick bamboo inside wall is the aperture, and the one end that is located a sieve section of thick bamboo lateral wall is the macropore, and such structure can avoid tiny fiber to block up the sieve mesh.

The utility model is provided with a feed end flange at the inlet of the screen cylinder and a discharge end flange at the outlet, which is convenient for connection; and the outside of a sieve section of thick bamboo is provided with the beaded finish along axial arrangement, improves a sieve section of thick bamboo intensity.

Drawings

FIG. 1 is a schematic diagram of a heat distribution system according to an embodiment of the present invention;

FIG. 2 is a schematic view of a pre-dewatering plug screw in an embodiment of the present invention;

FIG. 3 is a schematic view of a screen cylinder on a pre-dewatering plug screw in an embodiment of the present invention;

FIG. 4 is a schematic diagram showing the expansion of a screen drum on a pre-dewatering plug screw according to an embodiment of the present invention;

FIG. 5 is a schematic view of the screen holes and wedge-shaped grooves on the surface of the screen cylinder according to the embodiment of the present invention;

FIG. 6 is a schematic sectional view of the sieve holes and the wedge-shaped grooves on the surface of the sieve drum according to the embodiment of the present invention;

FIG. 7 is a schematic view of a pre-heated plug screw according to an embodiment of the present invention;

FIG. 8 is a cross-sectional view A-A of FIG. 7;

FIG. 9 is a schematic view of the tail structure of the refining heating screw according to an embodiment of the present invention;

FIG. 10 is a schematic view of the material stirring mechanism of the refining heating screw according to an embodiment of the present invention;

FIG. 11 is a schematic view of a stirring plate of a refining heating screw according to an embodiment of the present invention;

FIG. 12 is a schematic view of a refining mechanism of a refining heating screw according to an embodiment of the present invention;

FIG. 13 is a schematic view of a refining roller configuration of a refining heating screw according to an embodiment of the present invention;

fig. 14 is a sectional view of the composite disc heat spreader in the embodiment of the present invention;

fig. 15 is a schematic structural view of a flow guide mechanism of the composite disc heat spreader according to an embodiment of the present invention;

fig. 16 is a schematic view of a flow guide mechanism of the composite disc heat spreader in the embodiment of the present invention;

fig. 17 is a schematic view of a distributing block of the composite disc heat spreader in the embodiment of the present invention;

fig. 18 is a schematic view of a spatula of the composite disk heat spreader in an embodiment of the present invention;

fig. 19 is a schematic distribution diagram of dilution water pipes of the composite disc heat spreader in the embodiment of the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in fig. 2 to 6, the embodiment discloses a pre-dewatering screen frame for a plug screw, which includes a screen cylinder 3, a plug screw shaft 41 extending along a central axis in the screen cylinder 3, a plug screw blade arranged on the plug screw shaft 41, the screen cylinder 3 having a conical cylinder structure with a large inlet and a small outlet, and the plug screw blade matched with the screen cylinder 3 also having a conical structure. 3 surface distribution on a sieve section of thick bamboo has sieve mesh 20, and sieve mesh 20 is the step hole structure, and its one end that is located 3 inside walls of a sieve section of thick bamboo is the aperture, and the one end that is located 3 outside walls of a sieve section of thick bamboo is the macropore, and such structure can avoid tiny fiber to block up the sieve mesh.

And in order to increase the dewatering effect and avoid the lapping and agglomeration of the fiber bundles in the high-concentration slurry 12, a wedge-shaped groove 19 is arranged on the inner side wall of the screen cylinder 3, and the wedge-shaped groove 19 and the inner wall of the screen cylinder form a certain included angle X. The wedge-shaped groove 19 is arranged in the warp direction of the screen cylinder, and the straight edge of the wedge-shaped groove 19 is opposite to the moving direction of the pulp. When the plug screw shaft 41 rotates, the rotating direction 21 of the plug screw shaft is opposite to the wedge-shaped groove 19, so that the friction force between the pulp and the screen frame 3 can be greatly enhanced, the dewatering capacity of the screen frame 3 is greatly improved, and the fiber bundles are prevented from being lapped and agglomerated.

The inlet of the screen drum 3 is provided with a feed end flange 301, and the outlet of the screen drum is provided with a discharge end flange 302, so that the screen drum is convenient to connect; and the outside of a sieve section of thick bamboo 3 is provided with the beaded finish along axial arrangement, improves a sieve section of thick bamboo intensity.

When the slurry enters the inside of the pre-dewatering plug screw 15 through the feed inlet 4 and the plug screw shaft rotates, the water in the high-concentration slurry 12 is discharged along with the space compression, and the concentration of the slurry is further increased to 35-40%.

The utility model is suitable for a material stopper screw equipment of heat dispersion system can make the recovery paper pulp thick liquids of high concentration, before getting into the heat dispersion machine, carries out dehydration in advance. The pre-dehydration screen frame is arranged in the material plug screw to form a pre-dehydration material plug screw 15, and the pre-dehydration material plug screw 15 is applied to a heat dispersion system.

As shown in fig. 1 to 19, the heat dispersion system includes a press screw 14, a pre-dewatering plug screw 15, a pre-heating shredding screw 16, a refining heating screw 17, and a composite disc heat disperser 18, which are connected in sequence, slurry enters the system from an inlet 1 of the press screw 14 and is discharged from a discharge port of the composite disc heat disperser 18, and other equipment feed and discharge ports are all connected end to form a closed pressure space.

In order to ensure that sufficient friction is generated between the fibers in the slurry, the slurry needs to be dewatered by pressing before entering the thermal dispersion machine. The press screw 14 is the prior art, and after the slurry enters from the feed inlet 1 of the screw press 14 and is dehydrated and concentrated, the concentration of the slurry is increased to 25-30%.

Due to the structural characteristics of the squeezing and dewatering machine of the squeezing screw 14, the concentration of the discharged slurry can not meet the requirement, and the use of the heat dispersion machine is greatly influenced. In this embodiment, the press screw 14 is followed by the pre-dewatering plug screw 15, and the pulp after pressing enters the pre-dewatering plug screw 15 from the discharge port 2 of the screw press 14.

The pulp, dewatered again by the pre-dewatering plug screw 15, is further increased in concentration to between 35-40% and then enters the interior of the pre-heating shredder screw 16. The preheating shredding screw 16 comprises a shredding shell and a shredding screw shaft arranged in the shredding shell along the central axis in an extending mode, wherein a shredding screw sheet 22 is arranged on the shredding screw shaft, and the screw sheet 6 has a tearing and breaking function for fiber bundles in paper pulp. A steam inlet 6 is arranged on the shredding shell, and the steam inlet 6 is communicated to the inside of the shredding shell.

In this embodiment, the double shell structure that the shredding shell of preheating shredding spiral 16 comprises interior casing 23 and shell body 24 is filled with thermal insulation material 25 between interior casing and the shell body, plays the heat preservation effect, avoids the scald to reduce steam loss. The steam inlet 6 and the feed opening 5 are directed through the interior of the inner shell 23.

In this embodiment, the feed opening 5 and the steam inlet 6 of the preheating shredding screw 16 are located at the same circumferential position of the housing, wherein the feed opening 5 of the preheating shredding screw 16 is horizontally arranged, and the steam inlet 6 of the preheating shredding screw 16 is vertically arranged at the upper portion.

In this embodiment, the pre-heating shredding screw 16 has its axis extending outward to be connected to the power source, and the axis extending section of the shredding screw axis is provided with two bearing seat supports 161 in cooperation. The bearing blocks 161 and shredder housing are supported by the support brackets 162 and the fixed legs 162.

In order to ensure that the adhesive in the slurry can be smoothly dispersed in a micro-scale manner, the slurry needs to be heated before the slurry enters thermal dispersion, and the temperature generally needs to reach 90-120 ℃ so as to enable the adhesive to be smoothly softened. However, if the slurry is heated only by means of the heating screw process, the steam is not easily heated to the slurry inside due to the extremely high concentration of the slurry (between 30 and 40%), or it takes a long time to heat the slurry to a desired temperature, which has a great influence on the working efficiency of the whole system in no way.

The slurry, which is again dewatered by the pre-dewatering plug screw 15, enters the interior of the pre-heating shredding screw 16 through the feed inlet 5. Since the pulp concentration at this time is extremely high, fibers in the pulp are lapped and agglomerated to each other, which is extremely disadvantageous for heat dispersion. The fiber bundle therein is macerated and torn by preheating the helical blades 22 of the macerating screw 16. Through the preliminary thinning and dispersion, the fiber particles are small enough while the fiber particles are still, high-temperature steam passes through the steam inlet 6 and continuously enters the equipment, and the dispersed slurry is heated until the slurry is discharged from the discharge port 7. The heating effect of the steam is amplified at this time, and the slurry is also subjected to the heating process in advance.

The spiral of tearing to tear in preheating of this embodiment has the function of preheating, can be when the tow in the thick liquids is torn to refine, preheat in advance the thick liquids (because the thick liquids is by preliminary refining dispersion this moment, the heat exchange effect of steam is enlargied in the short time, the thick liquids temperature is promoted rapidly, though can not reach the heat dispersion requirement, but can reduce follow-up heating spiral's steam demand in a large number), reduce the steam quantity at the heating spiral section, can reduce the heat time greatly simultaneously, to the efficiency that improves entire system, the effect of very big optimization has been played.

By means of the preliminary refining and preheating of the preheated shredder screw 16, the pulp is fed through its outlet 7 to the inlet 8 of the refining heat screw 17. The refining heating screw 17 comprises a heating shell 25 and a refining screw shaft 26 which is arranged in the refining heating shell 25 in an extending mode along the central axis, a steam filling pipe 9 is arranged on the heating shell 25, the refining screw shaft 26 is sequentially divided into a forward-pushing screw section, a refining section, a stirring section and a reverse-pushing screw section along the conveying direction, a refining screw blade 261 is arranged on the forward-pushing screw section, the refining screw blade 261 extends to a discharge hole of the refining heating screw 17, the stirring section corresponds to the discharge hole 10 of the refining heating screw, a stirring mechanism is arranged on the stirring section, and a refining mechanism is arranged on the refining section; the reverse-thrust spiral section is provided with a cleaning spiral blade 29 with the rotation direction opposite to that of the refining spiral blade, so that excessive slurry can be effectively prevented from moving and accumulating to the tail end of the heating shell 25.

In this embodiment, the material shifting mechanism includes material shifting plates 28 circumferentially arranged on the material shifting section, and the material shifting plates are of a T-shaped structure. When the kick-out plate 1 is welded on the surface of the kick-out section of the refining screw shaft, a rib plate 281 is arranged on the non-slurry-facing surface of the kick-out plate to ensure the strength of the kick-out plate 28 in working. The number of the material shifting plates and the rib plates in the drawing is only used for expressing the working principle, and is not actual.

In this embodiment, the material homogenizing mechanism includes a hoop-type mounting seat formed by a plurality of arc plates 27 in butt joint, and the hoop-type mounting seat is fixed on the material homogenizing section. The arc plate 27 is provided with supporting legs at two ends, and the plane of the supporting leg is provided with a mounting hole 271 which is convenient to detach and mount. A plurality of refining rollers 40 are uniformly distributed on the surface of the arc plate 27. When the refining mechanism is assembled, the arc of the arc plate 27 is proportional to the number of the refining mechanisms, preferably 3, and the arc is pi/3.

Preheated slurry enters the refining device through an inlet 8 of the refining heating screw 17, a long refining screw shaft 26 is arranged inside the refining heating screw 17, and a large amount of steam enters the device through a steam filling pipe 9 in the conveying process to uniformly heat the slurry, so that the temperature of the slurry meets the requirement. However, the slurry concentration is very high, and the slurry is easy to fall into the thermal dispersion in a conglobation manner, so that the thermal dispersion feeding is not uniform, and the dispersion power fluctuates. The setting of refining mechanism can evenly distribute thick liquids and make its even forward motion, then through the kickoff mechanism behind, dial thick liquids in discharge gate 10. In the process, a small amount of slurry still reaches the tail part of the heating shell 35, if the working power is increased due to long-time accumulation, the reverse-thrust spiral section at the position is provided with a cleaning spiral blade 29 which has the opposite rotation direction to that of the refining spiral blade, and the rotation direction of the cleaning spiral blade is opposite to that of the blade on the spiral shaft 26, so that the slurry accumulated at the tail part of the heating shell 35 can be pushed out, and the slurry accumulation at the tail part of the shell to cause blockage and accumulation can be avoided when high-concentration slurry is conveyed.

The refining heating screw 17 can heat the slurry before the slurry enters the thermal dispersion machine, and the uniformity and the stability of discharging are ensured.

The slurry treated by the material homogenizing heating screw 17 enters a feeding port 11 of a composite disc type heat dispersion machine 18 through a discharging port 10, the composite disc type heat dispersion machine comprises a conveying screw 36 and a heat dispersion machine shell 34 connected with the conveying screw, a fixed toothed disc 37 and a movable toothed disc 31 which are matched with each other are arranged in the heat dispersion machine shell 34, and a dispersion area is formed between the fixed toothed disc 37 and the movable toothed disc 31; the fixed toothed plate 37 is located on the side adjacent to the conveying screw 36, and a central portion of the fixed toothed plate 37 has a through hole as a conveying passage connected to the conveying screw 36.

Due to the structural characteristics of the heat dispersion machine, a certain gap is kept between the conveying screw 36 and the movable fluted disc 31. The slurry in the gap can not smoothly reach the dispersion area between the fixed fluted disc 37 and the movable fluted disc 31, and is easy to harden on the dispersion teeth after long-time flocculation, and if the slurry is not cleaned in time, the dispersion teeth are easy to block, and the working efficiency of the equipment is affected. In this embodiment, a diversion mechanism is disposed at the center of the movable toothed disc 31, the diversion mechanism includes a disc-shaped swivel base mounted on the movable toothed disc, a diversion blade 39 is disposed on the swivel base, and the diversion blade 39 rotates to guide the transported slurry to the dispersion area.

In this embodiment, the movable fluted disc 31 is installed on the driving shaft, and the spindle head gland 38 is arranged on the movable fluted disc 31 and is used for connecting with the driving shaft, and the spindle head gland 28 forms a swivel seat of the diversion mechanism; the spindle head gland comprises a bottom plate and a conical cover fixedly arranged at the center of the bottom plate, and guide vanes 39 are uniformly arranged in the circumferential direction of the conical cover. The guide vane 39 has a certain radian and has the same rotating direction with the movable fluted disc.

When the movable fluted disc 31 rotates at a high speed, the guide vanes 39 generate a strong centrifugal force, and the high-concentration slurry 5 is quickly guided to the dispersion area between the movable fluted disc 31 and the fixed fluted disc 37 to be dispersed under the action of the centrifugal force, and then reaches the good slurry area 42 after passing through the dispersion action of the fixed fluted disc 37 and the movable fluted disc 31.

The guide mechanism disperses high-concentration slurry through the guide effect formed by the guide vanes in the high-speed rotating process so as to disperse the dispersion effect of the teeth, greatly avoid the flocculation of the slurry at the center of the movable fluted disc, reduce the downtime caused by the flocculation and improve the production efficiency.

The consistency of the pulp entering the thermal dispersion machine is between 35-40% in order to ensure that sufficient friction between the fibres in the pulp is created, but such consistency results in the dispersed pulp being difficult to discharge and prone to flocculation and clumping, clogging the equipment. In order to solve the problem, in this embodiment, a plurality of distributing blocks 33 are uniformly distributed in the circumferential direction of the movable toothed disc 31, and a distance is kept between the distributing blocks 33 and the heat dispersion machine housing 34. The distributing block 33 is in a pyramid boss shape, and one side of the slurry facing side is a transition type circular arc 331, and the diagonal line at the position also adopts the transition type circular arc.

In this embodiment, one side of the movable toothed disc 31 opposite to the heat spreader housing 34 is a back side of the movable toothed disc, a plurality of scrapers 32 are uniformly distributed at positions on the back side of the movable toothed disc close to the circumferential edge, and the scrapers 32 are in a cubic structure. The spatula 32 forms an angle α with the block in the circumferential direction.

When the thermal dispersion works, the high-concentration slurry 6 is conveyed to a working area, the high-concentration slurry enters a gap between the shell 34 of the thermal dispersion machine and the distributing block 33 after passing through the dispersion action of the fixed disc teeth 37 and the movable toothed disc 31, and the distributing block 33 uniformly distributes the high-concentration slurry, so that the high-concentration slurry can be smoothly discharged through the discharge hole 12.

Meanwhile, a certain amount of high-concentration slurry falls between the back side of the movable toothed disc 31 and the heat dispersion machine shell 34, and the scraper 32 arranged at the back of the movable toothed disc 31 hangs the slurry, so that accumulation is avoided.

Divide setting up of shifting block and spatula at heat dispersion machine during operation, can be with the even and quick scattering of beating of thick liquids that disperse, avoided the thick liquids of too high concentration simultaneously to flocculate integrated group between driving disk back and casing, influence out thick liquid effect.

In order to ensure sufficient friction between the fibers during thermal dispersion, a feed concentration of 35-40% is required. However, the slurry concentration after dispersion remains in this range, which causes inconvenience in subsequent transportation and screening work (the concentration required for the subsequent process is between 5 and 7%). In order to solve this problem, in this embodiment, a plurality of dilution water pipes 13 are arranged in the circumferential direction of the heat spreader shell 34, and the dilution water pipes 13 inject a large amount of dilution water into the good pulp region, and the diluted pulp is discharged through the discharge port 12.

In this embodiment, the discharge port 12 of the composite disk heat dissipation is arranged along the tangential direction of the housing of the heat dissipation device, the pipe wall of the discharge port is also provided with the dilution water pipe 30, the dilution water pipe 30 at the discharge port and the discharge port 12 form an obtuse included angle β arrangement 1, and the water flow of the dilution water pipe 30 can accelerate the discharge of the slurry.

The arrangement of the dilution water pipes can realize omnibearing dilution on the slurry after the slurry is subjected to dispersion operation, so that subsequent conveying and screening are facilitated.

The system of the embodiment is designed to dehydrate the pulp after the press screw for the second time, so that the concentration of the pulp reaches 35-40%, the consumption of steam is greatly reduced, and the power output fluctuation phenomenon caused by uneven heat dispersion feeding is well solved.

The system of this embodiment can reduce the steam usage by 30% or more and improve the dispersion efficiency by 15% or more by the actions of the above-described devices.

The above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention may be modified or substituted with equivalents without departing from the spirit and scope of the invention, which should be construed as being limited only by the claims.

In the description of the present invention, it should be understood that the terms "front", "back", "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the description refers must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.

Claims

1. The utility model provides a material stopper spiral is with dehydration reel in advance which characterized in that: including a sieve section of thick bamboo, a sieve section of thick bamboo presents the big, little awl section of thick bamboo structure of export of import, and a sieve section of thick bamboo surface distribution has the sieve mesh, arranges at a sieve section of thick bamboo inside wall simultaneously and is equipped with the wedge groove, and the wedge groove is arranged along the warp direction of a sieve section of thick bamboo, and the straight flange in wedge groove is relative with the direction of motion of thick liquids.

2. The pre-dewatering screen frame for a plug screw of claim 1, wherein: the sieve mesh is of a stepped hole structure, one end of the sieve mesh, which is positioned on the inner side wall of the sieve cylinder, is a small hole, and the other end of the sieve mesh, which is positioned on the outer side wall of the sieve cylinder, is a large hole.

3. The pre-dewatering screen frame for a plug screw of claim 1, wherein: the inlet of the screen drum is provided with a feed end flange, and the outlet of the screen drum is provided with a discharge end flange.

4. The pre-dewatering screen frame for a plug screw of claim 1, wherein: the outside of a sieve section of thick bamboo is provided with the beaded finish along axial arrangement.

5. A pre-dewatering screen frame for a plug screw according to any one of claims 1 to 4, characterised in that: the material plug screw shaft of the material plug screw is arranged in the screen cylinder in an extending mode along the central axis of the screen cylinder, and material plug screw blades matched with the screen cylinder are arranged on the material plug screw shaft and are also of a conical structure.