CN212925588U

CN212925588U - A novel thick liquid pond structure for broke pulper

Info

Publication number: CN212925588U
Application number: CN202021068307.2U
Authority: CN
Inventors: 刘建坡; 刘建涛; 赵永超
Original assignee: Zhengzhou Leizhan Technology Paper Machinery Co Ltd
Current assignee: Zhengzhou Leizhan Technology Paper Machinery Co Ltd
Priority date: 2020-06-11
Filing date: 2020-06-11
Publication date: 2021-04-09
Anticipated expiration: 2030-06-11

Abstract

The utility model discloses a novel pulp tank structure for a broke pulper, which comprises a pulp tank, wherein a rotor is arranged in the pulp tank, and the pulp tank is of an upper open structure formed by enclosing a front side wall, a rear side wall, a left side wall, a right side wall and a tank bottom; wherein, the front side wall is in an arc structure, the top of the front side wall is connected with a feeding slide carriage, and the bottom of the front side wall is smoothly connected with the bottom of the tank; the top of the rear side wall is connected with a backflow arc in a tangent mode; the pool bottom is downwards guided and inclined from the back side wall to the front side wall; the rotor is arranged on the rear side wall, and a pulp outlet is arranged behind the rotor. The utility model discloses strengthened the dynamics of broke interact in the thick liquid pond on vertical cross-section, on the other hand improves the contact frequency between its and the rotor, reduces rotor diameter and consumption of power as far as, compromises the disintegration efficiency simultaneously to realize the purpose of efficiency maximize.

Description

A novel thick liquid pond structure for broke pulper

Technical Field

The utility model relates to a papermaking equipment technical field especially relates to an equipment that garrulous decomposition was handled is carried out to broke of paper machine part.

Background

During the papermaking process, a large amount of broke, i.e. unformed or defective paper, is produced in the machine section. The broke does not contain impurities and can be reused after being disintegrated. The broke is usually broke disintegrated by arranging a broke pulper below a paper machine, and most of the broke pulper adopts a horizontal structure due to the limitation of the field, namely, the rotor of the pulper is vertical to the horizontal plane.

The broke pulper needs a pulp tank arranged below a paper machine for pulping, and the traditional broke pulp tank is of a flat cubic structure and is convenient to manufacture. The height of the pulp tank is low, the width of the pulp tank is close to the width of the paper machine, when the rotor of the pulper works, the interaction of laminar flow and turbulent flow in pulp flow cannot be well utilized, and only the pulping action of the rotor can be relied on. Therefore, the conventional pulp chest needs to be equipped with a large rotor and power to meet the production requirement, otherwise, a long time is wasted for breaking the broke.

The invention with the publication number CN105755882B discloses a broke treatment tank of a paper machine, which comprises a broke tank, a pulper, a clear water injection pipe and a pulp flow pipeline, and is characterized in that: the utility model discloses a pulping machine, including the break pond, the bottom lateral wall in break pond is opened there is bottom export a, the pulper has at least one, the head flow pipeline is including advancing thick liquid pipe, pulp extraction pipe, back flow and play thick liquid pipe, the initiating terminal that advances thick liquid pipe communicates with each other with the bottom export a in break pond, advances to have installed the stuff pump between thick liquid pipe and the pulp extraction pipe, back flow and play thick liquid pipe link together through three-way pipe coupling, all install the fluid control valve on back flow and the play thick liquid pipe, the output b of back flow and the bottom export a edge in the break pond are 10 ~ 100cm apart, the utility model discloses install the back flow technology additional, can effectively prevent the problem that the pulp extraction pump takes place the break and block up the pulp inlet pipe at the pulp extraction in-process to reduce water consumption and power consumption, the life of extension equipment.

Notice No. CN 206858935U's utility model discloses a funnel formula wet loss pond is including decreasing the paper groove, the longitudinal section that decreases the paper groove is the toper, the wide-mouth end that decreases the paper groove is the rectangle, the narrow-mouth end is circularly, the narrow-mouth end that decreases the paper groove is installed on the bearing rack down, the pulper portion is connected down to the narrow-mouth end, the pulper portion includes the drum of diameter and narrow-mouth end diameter looks adaptation, install the agitator in the drum, the vertical setting of (mixing) shaft of agitator, and the impeller up, under the impeller through the dead knife of bearing coaxial arrangement flabellum formula, the blade and the drum fixed connection of dead knife, the lower extreme fixed connection belt pulley of (mixing) shaft, the belt pulley passes through motor drive. Compared with the prior art, the beneficial effects of the utility model are that: the broke pond used in the wet part, namely the couch roll broke pond and the press broke pond, has the advantages of only needing one stirrer, occupying small area, saving space, saving energy and saving investment.

However, the technical scheme still utilizes the disintegration action of the rotor of the pulper to work, does not well utilize the interaction of laminar flow and turbulent flow in the pulp flow, and has low disintegration efficiency of broke, long time and high energy consumption.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the problem among the prior art, provide a novel thick liquid pond structure for broke pulper.

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

a novel pulp tank structure for a broke pulper comprises a pulp tank, wherein a rotor is arranged in the pulp tank, and the pulp tank is of an upper open structure formed by enclosing a front side wall, a rear side wall, a left side wall, a right side wall and a tank bottom; wherein, the front side wall is in an arc structure, the top of the front side wall is connected with a feeding slide carriage, and the bottom of the front side wall is smoothly connected with the bottom of the tank; the top of the rear side wall is connected with a backflow arc in a tangent mode; the pool bottom is downwards guided and inclined from the back side wall to the front side wall; the rotor is arranged on the rear side wall, and a pulp outlet is arranged behind the rotor.

The feeding slide carriage is arranged in a forward inclining mode, and an included angle between the feeding slide carriage and the vertical direction is not more than 45 degrees.

The front side wall is divided into an upper half arc and a lower half arc by taking a horizontal plane where the corresponding circle center is located as a boundary, and the angle range of the upper half arc corresponding to the circle center angle is 30-40 degrees.

The inclination angle of the pool bottom is not more than 10 degrees.

The angle range of the backflow arc corresponding to the central angle is 190-200 degrees.

The radius of the backflow circular arc is between one fourth and one fifth of the radius of the front side wall, and the circle center of the backflow circular arc is higher than the intersection point between the feeding slide carriage and the front side wall.

The rotor is located at the middle position of the rear side wall in the width direction, and the rotor is located below the circle center corresponding to the front side wall in the height direction.

The distance between the rotor and the corresponding circle center of the front side wall in the height direction is one third of the corresponding radius of the front side wall.

The utility model has the advantages that:

the utility model discloses abandoned the cube structure in traditional thick liquid pond, adopted "two back circulation passageway" structural design in the vertical cross-section direction in thick liquid pond. The special requirements of the pulp tank of the broke pulper are fully considered, the diameter of a rotor and power consumption are reduced as far as possible, and meanwhile, the disintegrating efficiency is considered, so that the purpose of maximizing efficiency is achieved.

The utility model discloses a structural design of "two back flow passageway" has realized the optimal design of thick liquid pond structure. The interaction force of the broke in the stock chest is increased on the vertical section, and on the other hand, the contact frequency between the broke and the rotor is increased.

Drawings

Fig. 1 is a top view of the present invention;

FIG. 2 is a sectional view A-A of FIG. 1;

FIG. 3 is a schematic view of the flow of slurry in the slurry tank in cross-section;

fig. 4 is a schematic view of the vortex in the slurry tank in a top view.

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. 1 to 4, the novel pulp tank structure for broke pulper of the present embodiment includes a pulp tank, a rotor is disposed in the pulp tank, and the pulp tank is an upper open structure enclosed by a front side wall 2, a rear side wall 8, a left side wall, a right side wall and a tank bottom 4. The rotor 6 is arranged on the rear side wall 8, and a slurry outlet 7 is arranged behind the rotor 6.

As shown in fig. 2, a section of the stock chest is shown along the stock chest a-a; the structure mainly comprises:

the feeding slide carriage 1 forms a certain included angle 13 with the vertical direction, and the range of the included angle is generally not more than 45 degrees.

The front side wall 2 is of an arc-shaped structure, the top of the front side wall is connected with the feeding slide carriage 1, and the bottom of the front side wall is connected with the bottom 4 of the tank. The front side wall 2 is divided into an upper half arc and a lower half arc by taking a horizontal plane where the corresponding circle center is located as a boundary, and the angle range of the upper half arc corresponding to the circle center angle 14 is 30-40 degrees.

The tank bottom 4 is downwards guided and inclined from the rear side wall 8 to the front side wall 2, a certain included angle 5 is formed between the tank bottom and the horizontal plane, the included angle 5 is generally set to be 10 degrees, the included angle is not too large, otherwise, the pulp flow speed at the front side wall 2 is too large, and splashing is generated.

The other side of the chest is the rear side wall 8, where the outlet 7 and the rotor 6 of the broke pulper are located, the rotor 6 being located in the middle of the rear side wall in the width direction. In the height direction, a distance 20 is located below the center of the front side wall 2, which distance 20 is preferably kept generally at one third of the radius 3 of the front side wall 2. If the distance 20 is too large, the downward flow of the slurry stirred by the rotor 6 cannot flow close to the front side wall 2, and if the distance is too low, the upward flow of the slurry cannot rapidly pass through the circular migration arc 10.

At the top of the side wall 8, tangentially connected thereto is a return arc 10. The circular arc 10 is not a 180-degree circular arc, the tail end of the circular arc extends out to form an included angle 14 with the horizontal plane, and the included angle 14 is 10-20 degrees, so that the angle range of the whole circular arc 10 corresponding to the central angle is 190-200 degrees. The radius 9 of the return arc 10 is approximately between one fourth and one fifth of the radius 3 of the front side wall 2. Meanwhile, the circle center of the circular arc 10 of the backflow is higher than the intersection point between the feeding slide carriage 1 and the front side wall 2 by a certain distance 12, and the distance 12 is basically equal to the radius 9 of the circular arc 10 of the backflow.

As shown in fig. 3, a schematic view of the slurry flow after analysis by the fluid dynamics software is shown, where the rotor 6 is rotating clockwise (viewed in the direction of the front sidewall 2). When the rotor 6 stirs the slurry, the slurry flow 14 flows to the front side wall 2 along the tank bottom 4, and the slurry flow speed gradually becomes slow; when the highest point of the front side wall 2 is reached, the slurry flow is layered at the moment, the slurry flow 16 with high flow rate at the outer side continues to move forwards along the tangent line of the front side wall 2, and the slurry flow 15 with low flow rate at the inner side moves towards the position of the rotor 6 under the suction effect of the rotor 6.

In the process of the movement of the slurry flow 15 with the slower flow speed sucked by the rotor 6, the slurry on the outer side of the slurry flow is pushed to the side wall 8 to move towards the back flow circular arc 10 under the influence of the upward pushing of the rotor 6; the pulp on the inner side is continuously sucked by the rotor, wherein a part of qualified fibers and water are pumped by the rotor to form a pulp flow 21 and discharged through the pulp outlet 7, and another part of pulp 19 is hit by the rotor 6 and then continuously flows into the pulp flow 14 for circulation.

On the other hand, the rotation of the rotor 6 pushes a part of the slurry flow 17 upwards along the side wall 8 to form a return slurry flow 22 along the return arc 2. The reflowing pulp flow 22 is jointed with the high-speed pulp flow 16 and the pulp flow 18 in succession in the downward movement process to form a vortex passage, and strong interaction occurs in the jointing process, so that the collision and friction of paper scraps, paper fibers and the like in the pulp greatly accelerate the breaking process of the broken paper.

As shown in fig. 4, a schematic view of the flow of slurry in the slurry tank is shown in a top view. The rotor 6 is rotated in a clockwise direction 26 and the flow 31 of the rotor 6 pushed towards the left side wall of the pulp chest, through a series of guides in the pulp chest, is also sucked by the rotor 6 to the centre of the rotor and meets the flow 28 of the rotor 6 pushed towards the right side wall of the pulp chest, forming a vortex channel 32 and is sucked together to the rotor 6 for re-disintegration.

According to the Bernoulli effect, the pressure of the pulp on two sides is applied to the vortex channel, and the interaction between the paper scraps and the paper fibers is more severe.

In conclusion, it can be known that the novel pulp tank can cause pulp to form violent and effective turbulence action in the process of being stirred by the rotor 6 through reasonable design, and can generate laminar flow effect in time and increase the interaction between pulp flows in the turbulence action.

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 novel thick liquid pond structure for broke pulper, includes the thick liquid pond, is equipped with rotor, its characterized in that in the thick liquid pond: the slurry tank is of an upper open structure formed by enclosing a front side wall, a rear side wall, a left side wall, a right side wall and a tank bottom; wherein, the front side wall is in an arc structure, the top of the front side wall is connected with a feeding slide carriage, and the bottom of the front side wall is smoothly connected with the bottom of the tank; the top of the rear side wall is connected with a backflow arc in a tangent mode; the pool bottom is downwards guided and inclined from the back side wall to the front side wall; the rotor is arranged on the rear side wall, and a pulp outlet is arranged behind the rotor.

2. The new pulp chest arrangement for broke pulper according to claim 1, characterised in that: the feeding slide carriage is arranged in a forward inclining mode, and an included angle between the feeding slide carriage and the vertical direction is not more than 45 degrees.

3. The new pulp chest arrangement for broke pulper according to claim 1, characterised in that: the front side wall is divided into an upper half arc and a lower half arc by taking a horizontal plane where the corresponding circle center is located as a boundary, and the angle range of the upper half arc corresponding to the circle center angle is 30-40 degrees.

4. The new pulp chest arrangement for broke pulper according to claim 1, characterised in that: the inclination angle of the pool bottom is not more than 10 degrees.

5. The new pulp chest arrangement for broke pulper according to claim 1, characterised in that: the angle range of the backflow arc corresponding to the central angle is 190-200 degrees.

6. The new pulp chest arrangement for broke pulper according to claim 1, characterised in that: the radius of the backflow circular arc is between one fourth and one fifth of the radius of the front side wall, and the circle center of the backflow circular arc is higher than the intersection point between the feeding slide carriage and the front side wall.

7. The new pulp chest arrangement for broke pulpers according to any one of claims 1-6, characterised in that: the rotor is located at the middle position of the rear side wall in the width direction, and the rotor is located below the circle center corresponding to the front side wall in the height direction.

8. The new pulp chest arrangement for broke pulper according to claim 7, characterised in that: the distance between the rotor and the corresponding circle center of the front side wall in the height direction is one third of the corresponding radius of the front side wall.