WO2019179450A1

WO2019179450A1 - Rotary drum pulper and water addition method therefor

Info

Publication number: WO2019179450A1
Application number: PCT/CN2019/078793
Authority: WO
Inventors: 侯焕涛; 李天虎; 万哈拉⋅金莫
Original assignee: 安德里茨（中国）有限公司
Priority date: 2018-03-21
Filing date: 2019-03-20
Publication date: 2019-09-26
Also published as: CN108442157A; CN108442157B

Abstract

A rotary drum pulper (100), comprising a rotary drum (110), a feed hopper (120) and a water addition tube (140), the feed hopper (120) being used for inputting material to a feed end (130) of the rotary drum (110), the water addition tube (140) being designed to be suitable for directly adding water from the feed end (130) of the rotary drum (110) to the inside of the rotary drum (110). Also disclosed is a water addition method for the rotary drum pulper (100), wherein water is directly added to the inside of the rotary drum pulper (100) via the water addition tube (140) without flowing through the feed hopper (120).

Description

Drum pulper and water adding method thereof

Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a drum pulper, and more particularly to a watering device for a drum pulper for supplying disintegrated water into a drum pulper.

Background technique

The drum pulper is a pulping equipment widely used in the field of pulping. The pulverized slurry requires a certain amount of pulverized water, and the pulverized water needs to be mixed with the slurry. The disintegrated water of the drum pulper is usually added to the feed hopper of the drum pulper and then flows into the drum pulper. Figure 8 shows, in perspective view, the feed end of the drum pulper and a portion of the drum. For the sake of clarity, a water supply pipe for adding water from above the feed hopper is shown in a partially enlarged view in Fig. 8A, wherein the material and the disintegrating water are added together from the inlet of the feed hopper. Fig. 9 is a perspective view showing another arrangement of a prior art water supply pipe in which a water supply pipe is inserted from the side of the feed hopper into the feed hopper, and a plurality of water discharge holes are opened in the feed hopper.

There is a gap between the drum pulper and the feed hopper, which requires sealing between the feed hopper and the drum pulper by means of a packing or labyrinth seal. Moreover, if the seal form is worn or broken, or if the disintegration concentration fluctuates in the actual production in the drum pulper, the amount of disintegrated water fluctuates, and the disintegrated water may leak from the seal position.

The disintegration water (liquid) of the drum pulper is a broad meaning. For pulping of waste paper, it is possible to add medicine such as (deinked pulp) or no medicine (waste box pulp) at the feed hopper of the drum pulper. Currently in the paper industry, the inlet (liquid) pipe is mostly placed on the feed hopper. The setting features two separate addition points (water and drug separate) to the top of the feed hopper, or the water and the drug are mixed before being added to the feed hopper and added at a single point of addition. Even though the inlet pipe can be in the form of a pipe, in the prior art, the position of the inlet pipe usually ends above the feed hopper, and water always flows into the feed port of the drum pulper along the inner wall of the feed hopper.

For example, in the Chinese utility model CN204000425U, although the inlet pipe and the feeding pipe are mentioned, it is obvious that the position selection of the inlet pipe and the feeding pipe does not exceed the conventional technical means in the art, and FIG. 2 of the utility model can be It is understood that they are placed vertically above the feed hopper and water and corresponding chemicals are added directly from above to the feed hopper. This is also the reason why the feed hopper requirements and the feed port are connected by a sealing device.

The arrangement of the seal between the rotating drum pulper and the fixed feed hopper is first of all complicated in construction, and there is no prior art device for achieving a highly reliable seal at low cost. The seal between the rotating member and the fixed member causes suppression of the rotation of the rotating member, thereby consuming energy.

Secondly, the cost of sealing between the rotating drum pulper and the fixed feed hopper is high, so it is desirable to find a technical solution for the feed end of the feed hopper and the drum pulper. There is no longer a need for a seal, or at least a strict seal is no longer required. At the same time, it should also be able to ensure the smooth addition of the disintegrating water into the drum pulper, especially if it is possible to join in several stages.

Summary of the invention

Therefore, the technical problem to be solved by the present invention is to provide a drum pulper which simplifies the sealing between the feed hopper and the feed end of the drum pulper while ensuring the disintegration of water to the inside of the drum. Join.

This technical problem is solved by a drum pulper of the present invention, the drum pulper comprising: a drum; and a feed hopper for inputting material to the drum feed The drum pulper further includes a water supply pipe designed to directly apply water from the feed end of the drum to the inside of the drum.

According to a preferred embodiment of the drum pulper of the present invention, the water supplied from the water supply pipe enters the feeding end of the rotating drum at an axial section of the feeding end of the rotating drum. The circumference of the drum is lifted and is outside the contour enclosed by the trajectory of the material being dropped by the upper portion of the feed end of the drum. In the drum pulper, the material to be disintegrated rapidly slides from the lowest point of the feed hopper to the drum feed end, and the material is arranged in the circumferential direction after entering the drum. Cooperating with a plurality of baffles arranged in the axial direction, as the drum rotates, is lifted up from the lowest point of the drum at the cross-section of the drum at the lowest point of the cross-section, until the circumference of the inner wall of the drum Reach the high point near the 11 o'clock position on the cross section of the drum. At this time, the centrifugal force cannot overcome the gravity, and the material is no longer supported by the lifting plate, so the material is detached from the inner wall of the rotating drum and falls to the position of 5-6 o'clock in the cross section, and then repeatedly The rotation of the drum moves together to the 11 o'clock position on the cross section. In this way, the material repeatedly falls and beats, thereby achieving the purpose of disintegration. Therefore, the trajectory through which the material is thrown from the upper portion and the trajectory that the material is lifted from the lowest point along the circumference to the upper portion collectively enclose the possible range of the material on the cross section of the drum, and An area other than this in the cross section, for example, a half moon shaped area formed at a position of 1-4 o'clock is an area that is not hit by the material. Further selection in this area does not interfere with the position of the internal structure of the drum, and it is possible to find the location where the water pipe can be placed. For example, Figure 6 shows in a schematic cross-sectional view the movement of the material in the drum pulper, with no or only a few materials reaching the "upper right" shaded area of the illustration.

Further, the water supply pipe is disposed outside the feed hopper and protrudes into the inside of the drum. Here, the water supply pipe passes through the inlet hopper end flange from above the feed hopper into the interior of the drum. The water supply pipe may also be passed from the side of the feed hopper through the flange of the feed hopper end into the inside of the drum, and the position above the side of the feed hopper should be selected as described above to avoid the range in which the material may appear. However, in an alternative technical solution, it is also conceivable to extend the water supply pipe directly through the feed hopper into the interior of the rotating drum, and at this time, the feeding end of the feeding hopper and the rotating drum may not be The joint is placed at the upper end of the feed end of the drum. The difference between the two technical solutions is that since the area in which the water pipe can be inserted in the cross section of the drum is limited, if the water supply pipe is arranged to directly extend through the feed hopper into the interior of the drum, It is desirable to design the upper wall of the feed hopper at the point where it meets the feed end of the drum so that the water supply pipe does not extend to the lower portion of the drum cross section.

Further, although the water supply pipe is generally mentioned above, and the number of water pipes is not limited, it should be understood that in one embodiment, there are several water pipes that extend into the interior of the drum at different depths. As the material is spirally advanced in the drum pulper and gradually transported in the axial direction, the water added to the water pipe at different depths in different positions also functions as a water-added water in the pulper analogous to the intermittent operation mode. effect.

Further, in consideration of the technical effect of achieving the stepwise water addition, the water supply pipe may further have a nozzle having an adjustable cross-sectional area change. As the cross-sectional area of the nozzle changes, the water has a different initial velocity as it enters the drum, thereby spraying water to different depths inside the drum. In an alternative embodiment, the water supply pipe has a nozzle with an adjustable water outlet angle such that the water has a different initial angle when entering the drum, thereby spraying water to different depths of the interior of the drum. Obviously, it is also possible to design the nozzle of the water supply pipe to both change the size of the section and adjust the angle of the water to more flexibly spray water to different depths inside the drum.

In a further embodiment, it is also possible to design only a single water supply pipe which projects into the interior of the drum.

According to a preferred embodiment of the drum pulper according to the invention, the feed hopper is connected to the drum in a non-sealing manner, for example as a waste paper dispenser, even though the feed hopper and the drum It is also possible to retain the sealing device between them, and it is still possible to consider a packing seal or a labyrinth seal.

Further, in terms of a method, the present invention also provides a water adding method of a drum pulper as described above, characterized in that water is supplied to the inside of the drum pulper by a water pipe.

In this way, the disintegrated water is directly injected or added to the inside of the drum pulper without being fed through the feed hopper. The disintegrated water of the slurry is added directly to the first or second section of the drum pulper. In this way, the disintegrated water can be directly absorbed by the waste paper, and the risk of leakage at the sealing position can be solved, thereby achieving a clean production of the paper mill and at the same time reducing the energy consumption of the drum pulper.

It should be understood that the above mentions both the extension of the water pipe into the interior of the drum and the provision of water to the inside of the drum by means of spraying, so the invention aims to protect any water from being fed into the drum. It is a technical solution that comes into contact with the material after being added to the inside of the drum or even after a certain distance from the inside of the drum. The manner in which water is supplied to the inside of the drum is various, and in addition to the above-described scheme of actually extending the water pipe into the inside of the drum, it is also conceivable that the end of the water pipe does not protrude into the inside of the drum. In this case, the water supply pipe is arranged and designed to supply water from the outside of the drum to the inside of the drum. Preferably, the water supply pipe can provide different injection pressures to spray water into different depths inside the drum. Regardless of how the water supply pipe is designed and arranged, it is important that the position in which the water is introduced into the interior of the drum in the axial section of the feed end of the drum is in the contour surrounded by the trajectory of the material that is repeatedly lifted. Outside. Whether through the insertion of a water pipe or the direct injection of water, the purpose is to allow the disintegrating water to cross over rather than the area between the stationary feed hopper and the rotating drum that is currently used to seal the device. .

In contrast, the inertial thinking of one skilled in the art on the one hand is that they have been working on how to mechanically seal the seal, including different forms of seals, fillers of different materials or labyrinth seals without fillers. On the other hand, the inertial thinking is that, since water is mixed with materials such as waste paper after being added from the feed port in the prior art, those skilled in the art do not understand that water is capable of bypassing the seal. The area enters the drum within a certain distance. On the contrary, in the technical solution of the present invention, since the area where there is no material on the cross section of the drum is found, it is possible to spray the liquid material from the area through the pressure in the pipe to a certain depth in the drum pulper. In addition, the technical solution of the present invention also makes clever use of the fact that the material such as waste paper is mainly carried out after the drum is inserted into the drum, and the bulk packaging process can be carried out without water.

DRAWINGS

Figure 1 is a perspective view showing the drum pulper and its corresponding feeding hopper, the water pipe extending into the drum inside the feeding hopper;

Figure 2 shows the overall structure of the drum pulper and the feed hopper in a side view;

Figure 3 shows the feed hopper separately in a perspective view, wherein it can be seen that the end of the feed hopper has an end flange through which the water supply pipe enters the inside of the drum;

Figure 4 shows the feed hopper separately in the form of a perspective view, wherein it can be seen that the end flange of the feed hopper has a gap, and the water supply pipe is arranged at a position opposite to the notch;

Figure 5A shows, in a partially cutaway perspective view, a drum pulper in accordance with an embodiment of the present invention, wherein a water supply pipe extends through the feed hopper into the interior of the drum;

Figure 5B shows, in a partially cutaway perspective view, a drum pulper in accordance with an embodiment of the present invention, wherein a water supply pipe extends through the end flange of the feed hopper into the interior of the drum;

Figure 5C shows, in a partially cutaway perspective view, a drum pulper in accordance with an embodiment of the present invention, wherein the water supply pipe is disposed at a position opposite the notch of the end flange of the feed hopper, The water stream is injected into the interior of the drum;

Figure 6 shows in schematic form an axial section of the drum feed end of the drum pulper, wherein the extent to which the material is lifted and thrown is visible;

Fig. 7 shows the distribution of the moisture content in the direction of the drum axis after the waste paper enters the drum.

Figure 8 shows, in perspective view, the feed end of the drum pulper and a portion of the drum.

Fig. 8A shows, in a partially enlarged view, a water supply pipe for adding water from above the feed hopper, wherein the material and the disintegrating water are added together from the inlet of the feed hopper.

Fig. 9 is a perspective view showing another arrangement of a prior art water supply pipe in which a water supply pipe is inserted from the side of the feed hopper into the feed hopper, and a plurality of water discharge holes are opened in the feed hopper.

detailed description

1 and 2 are respectively a perspective view and a side view showing a drum pulper according to a first embodiment of the present invention and a correspondingly provided feed hopper, the water supply pipe extending above the feed hopper Inside the drum. Figure 3 shows the situation in which the water pipe passes through the end flange of the feed hopper in a perspective view. In Fig. 3, the position of the water supply pipe into the drum cross section on the cross section of the drum can be seen particularly clearly.

In this embodiment, as shown in Fig. 6, since the material in the drum pulper is continuously lifted from the lowest point in the drum to the approximate 11 o'clock position in Fig. 6, then it is thrown to 4-5 points. The position of the clock, thus no material at the 1-3 o'clock position in Fig. 6, is roughly a kidney-shaped area surrounded by a dotted line in the figure, from which the water supply pipe extends into the inside of the drum. The additional arrows in Fig. 6 show the direction of rotation of the drum and the trajectory of the material inside the drum, respectively.

Figure 4 is a perspective view showing a second embodiment of the drum pulper of the present invention, wherein the end flange of the feed hopper has a notch, and the water supply pipe is disposed at a position opposite to the notch, but not It extends into the inside of the drum, and the water flow from the water pipe can freely enter the inside of the drum through the gap.

In a third embodiment of the drum pulper of the present invention, not shown, the water supply pipe extends through the feed hopper into the interior of the drum. The difference from the first and second embodiments is that since the water supply pipe extends inside the feed hopper, it is necessary to appropriately select a higher height so as not to collide and interfere with the material put into the feed hopper.

5A and 5B show two variants of the first embodiment of the drum pulper of the present invention in a partial cross-sectional view, respectively. In the embodiment variant shown in Fig. 5A, the two water pipes extend into different depths inside the drum, thereby effecting the addition of water at different depths inside the drum. In the embodiment variant shown in Fig. 5B, the water supply pipe basically extends only a small distance beyond the end flange, but the water flow that is emitted can also reach the difference inside the drum due to the difference in the exit speed and angle. Pre-determined location. For example, the water supply pipe is designed here to have a nozzle (not shown) with an adjustable cross-sectional area such that the water has a different initial velocity as it enters the drum. Different initial velocities allow water to enter different depths inside the drum.

Similarly, water can also be sprayed into the drum pulper without the end of the water pipe extending into the interior of the drum. Such an implementation is shown in Figure 5C. In this embodiment, the position at which the water enters the feed end of the drum is equivalent to the position in which the water supply pipe extends into the inside of the drum, and the water supply pipe extends into the feed end of the drum. Similar to the embodiment variant shown in Fig. 5B, in the embodiment shown in Fig. 5C, the jet of water is likewise capable of reaching different predetermined positions inside the drum due to differences in its exit speed and angle. For the corresponding feed hopper and water supply pipe, please refer to the description of the second embodiment above, and also refer to FIG.

In another embodiment, the water supply pipe may be passed from the side of the feed hopper through the inlet flange of the feed hopper into the interior of the drum while avoiding the possible range of the material inside the drum. Although not shown in the drawings, in conjunction with the trajectory of the inner material of the drum shown in Fig. 6, particularly the kidney-shaped region, the position at which the water supply pipe can be selectively inserted above the hopper side can be clearly understood.

The present invention also relates to a method of adding water to a drum pulper, which employs the drum pulper described above, wherein water is directly supplied to the inside of the drum pulper through a water supply pipe without flowing through the inlet hopper. For a specific implementation, reference may be made to the specific description of the structure of the water pipe in the above device embodiment.

Fig. 7 shows the distribution of the moisture content in the direction of the drum axis after the waste paper enters the drum. Since the water is directly added to the inside of the drum pulper through the water supply pipe, the disintegrated water will diffuse into the two directions of the drum axis, respectively, and the disintegrated water which is diffused to the feed end in the opposite direction will be pushed in. The waste paper moving from the material end to the disintegration zone absorbs, from the feed end to the water addition point W inside the drum, the moisture content of the waste paper has a gradually increasing process, and the part of the free crush is diffused toward the feed end. The decontaminated water is absorbed by all incoming waste paper before reaching the feed end. As shown in the figure, the moisture content of the waste paper is 10%-30% at the feed end of the drum pulper. At this time, the moisture infiltration does not form free water in the waste paper, so there is no leakage problem, and the waste paper moisture The content of W at the point of addition of the disintegrated water usually reaches 70% to 85%.

It should be understood that the above-described embodiments are cited as examples, and the present invention is not limited to what has been particularly shown and described above. Rather, the scope of the present invention includes the combinations and sub-combinations of the various features described above, as well as variations and modifications which are apparent to those skilled in the art upon reading the foregoing description. The documents incorporated by reference in the present application are hereby incorporated by reference to the extent of the disclosure of the application of the application of the application of the application, For the term, only the definitions in this specification should be considered. It is important that the water is not in contact with the material either in the feed hopper but after it has been added to the inside of the drum or even a certain distance inside the drum.

List of reference signs

100 drum pulper

101 Disintegration Zone

102 screening area

110 drum

120 feed hopper

130 feed end of the drum;

140 water pipe

150 end flange of the feed hopper

160 end flange notch

Claims

A drum pulper, the drum pulper comprising:

Drum; and

a feed hopper for inputting material to a feed end of the drum;

It is characterized in that

The drum pulper further includes a water supply pipe that is designed to apply water directly from the feed end of the drum to the interior of the drum.
The drum pulper according to claim 1, wherein

As seen in the axial section of the feed end of the drum, the position at which the water supplied by the water supply pipe enters the feed end of the drum is lifted along the circumference of the drum and is on the drum The upper portion of the feed end is outside the contour enclosed by the trajectory of the material being dropped.
A drum pulper according to claim 2, wherein

The end of the water supply pipe does not protrude into the interior of the drum, but is arranged and designed to supply water from the outside of the drum to the inside of the drum.
A drum pulper according to claim 2, wherein

The water supply pipe is disposed outside the feed hopper and extends into the interior of the drum.
A drum pulper according to claim 2, wherein

The water supply pipe extends directly into the interior of the drum through the feed hopper.
A drum pulper according to any one of claims 2 to 5, characterized in that

The water supply pipe is a plurality of water supply pipes that protrude into the interior of the rotating drum at different depths.
A drum pulper according to any one of claims 2 to 5, characterized in that

The water supply pipe has only one.
A drum pulper according to any one of claims 2 to 5, characterized in that

The water supply pipe has a nozzle having an adjustable cross-sectional area such that the water has a different initial velocity when entering the drum.
A drum pulper according to any one of claims 2 to 5, characterized in that

The water supply pipe has a nozzle having an adjustable water outlet angle such that the water has a different initial angle when entering the drum.
A drum pulper according to any one of claims 1 to 5, characterized in that

The feed hopper is connected to the drum in a non-sealed manner.
A drum pulper according to any one of claims 1 to 5, characterized in that

The feed hopper and the drum are connected by a packing seal or a labyrinth seal.
A method of adding water to a drum pulper, using the drum pulper according to any one of claims 1 to 11, wherein water is directly supplied to the drum pulper through a water pipe The interior does not flow through the feed hopper.