Drum cylinder screen with multi-level pulp chest structure

Abstract

The utility model relates to the technical field of drum screens, in particular to a drum screen with a multi-level pulp chest structure, which comprises a drum screen and a pulp chest, a reaction screen drum area, a cleaning screen drum area and a spin-drying screen drum area are sequentially arranged in the drum screen along the material advancing direction, the reaction screen drum area, the cleaning screen drum area and the spin-drying screen drum area are sequentially communicated, and the pulp chest is arranged in the drum screen. The pulp tank comprises a reaction area pulp tank, a cleaning area pulp tank and a spin-drying area pulp tank, the reaction area pulp tank is arranged below the reaction screen drum area and receives liquid medicine screened out by the reaction screen drum area, and the cleaning area pulp tank is arranged below the cleaning screen drum area and receives mixed liquid screened out by the cleaning screen drum area; the spin-drying area pulp pool is arranged below the spin-drying screen drum area and receives mixed liquid screened out by the spin-drying screen drum area, and the drum screen can achieve cyclic utilization of liquid medicine and water and is beneficial to saving resources.

Description

TECHNICAL FIELD

[0001] The utility model relates to a drum cylinder screen technical field, concretely relates to a drum cylinder screen with multilayer pulp pool structure. BACKGROUND

[0002] The drum cylinder screen mainly comprises a cylinder part, a supporting and supporting wheel device, a transmission device, a shield and a water spraying system, a pulp pool and the like. The cylinder can be placed on the two supporting and supporting wheel devices with 1°-10° inclination, and the screen plate holes are arranged from large to small from the feeding end, so that the pulp can enter the pulp pool as soon as possible, and the load of the cylinder is reduced. In addition, a certain number of lifting plates, inclined support plates and partition plates are uniformly distributed in the cylinder to support and reinforce the cylinder, which greatly reduces the deformation of the cylinder during operation. The gear transmission part adopts a supporting tooth integrated structure, which reduces the equipment installation and maintenance time. The shield adopts a spraying structure with double-side water inlet and double-row staggered arrangement, which makes the cylinder easier to clean and the dilution and cleaning effect more complete. The inside of the pulp pool is provided with a flow guide wall, which moves circularly under the action of the stirring device, realizes secondary rubbing and loosening of the internal pulp, and separates the impurities again to reduce the fiber loss rate.

[0003] However, with the optimization and improvement of the drum cylinder screen cylinder, the single pulp collection pulp pool has obvious defects. Due to the effect of the cleaning area spraying water, the high-concentration liquid in the reaction area is seriously diluted, which greatly increases the difficulty of separating the liquid in the later stage, causes serious loss of the liquid, greatly wastes resources, and increases the cost. Therefore, the existing pulp pool structure cannot meet the process requirements on site. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model is to provide a drum cylinder screen with multilayer pulp pools, which can treat the liquid or cleaning liquid in different stages of the drum cylinder screen.

[0005] In order to solve the above technical problems, the utility model adopts the following technical scheme: a drum cylinder screen with multilayer pulp pool structure, comprising a cylinder screen and a pulp pool, reaction screen cylinder area, cleaning screen cylinder area and spin-dry screen cylinder area are sequentially arranged in the cylinder screen along the material running direction, the reaction screen cylinder area, the cleaning screen cylinder area and the spin-dry screen cylinder area are sequentially communicated, the pulp pool comprises a reaction area pulp pool, a cleaning area pulp pool and a spin-dry area pulp pool, the reaction area pulp pool is arranged below the reaction screen cylinder area and receives the liquid screened out by the reaction screen cylinder area, the cleaning area pulp pool is arranged below the cleaning screen cylinder area and receives the mixed liquid screened out by the cleaning screen cylinder area, and the spin-dry area pulp pool is arranged below the spin-dry screen cylinder area and receives the mixed liquid screened out by the spin-dry screen cylinder area.

[0006] The material reacts with the liquid medicine at the reaction screen drum area, the liquid medicine is discharged from the reaction screen drum area and collected in the reaction area slurry tank below, the material and part of the liquid medicine travel to the cleaning screen drum area, the liquid mixture produced by the material cleaning is discharged from the cleaning screen drum area and collected in the cleaning area slurry tank below, the material continues to travel to the spin-drying screen drum area, the cylinder screen performs spin-drying treatment on the material, the spun water and a small amount of liquid medicine are discharged from the spin-drying screen drum area and collected in the spin-drying area slurry tank below, and the liquid collected in the reaction area slurry tank, the cleaning area slurry tank and the spin-drying area slurry tank can be used according to the concentration of the liquid medicine, so that the use efficiency of the liquid medicine can be improved and resource waste can be reduced.

[0007] As a preferred scheme, the reaction area slurry tank is provided with an intermediate flow guide wall, the intermediate flow guide wall is provided with a stirrer hole, and the stirrer hole is provided with a stirrer. The stirring part of the stirrer is obliquely arranged in the reaction area slurry tank and drives the solution in the reaction area slurry tank to flow around the intermediate flow guide wall. The stirrer stirs in the reaction area slurry tank, can drive the liquid medicine to flow, and avoid the liquid medicine from precipitating.

[0008] As a preferred scheme, the intermediate flow guide wall is a herringbone shape.

[0009] As a preferred scheme, the bottoms of the reaction area slurry tank, the cleaning area slurry tank and the spin-drying area slurry tank are all inclined surfaces. The bottoms of all parts of the slurry tank are arranged as inclined surfaces, which is beneficial to cleaning all parts of the slurry tank and fully discharging the solution in all parts of the slurry tank.

[0010] As a preferred scheme, the bottoms of the reaction area slurry tank, the cleaning area slurry tank and the spin-drying area slurry tank are all inclined surfaces. The bottoms of all parts of the slurry tank are arranged as inclined surfaces, which is beneficial to cleaning all parts of the slurry tank and fully discharging the solution in all parts of the slurry tank.

[0011] As a preferred scheme, the bottoms of the reaction area slurry tank, the cleaning area slurry tank and the spin-drying area slurry tank are all inclined surfaces. The bottoms of all parts of the slurry tank are arranged as inclined surfaces, which is beneficial to cleaning all parts of the slurry tank and fully discharging the solution in all parts of the slurry tank.

[0012] As a preferred scheme, the slurry tank comprises a combined slurry tank, the inside of the combined slurry tank is provided with a partition plate, and the partition plate divides the combined slurry tank into the cleaning area slurry tank and the spin-drying area slurry tank. The overflow hole of the cleaning area slurry tank is not higher than the upper edge of the partition plate.

[0013] As a preferred scheme, the slurry tank comprises a combined slurry tank, the inside of the combined slurry tank is provided with a partition plate, and the partition plate divides the combined slurry tank into the cleaning area slurry tank and the spin-drying area slurry tank. The overflow hole of the cleaning area slurry tank is not higher than the upper edge of the partition plate.

[0014] Beneficial effects: the drum cylinder screen has the following beneficial effects: the liquid medicine concentration of the reaction zone slurry tank is reduced little, the liquid medicine after cleaning impurities can be used as the spraying liquid medicine of the reaction zone, recycling of the liquid medicine is realized, and the utilization rate is high; the liquid medicine in the cleaning zone slurry tank can be recycled and used after water and impurities are separated; the separated water is put into the slurry tank in the spin-drying zone for recycling; the liquid medicine content in the slurry tank in the spin-drying zone is extremely low, and most of the liquid medicine is water, after impurity treatment, the water can be directly used as the cleaning area spraying flushing water, recycling of the water is realized, and recycling of the liquid medicine and water is realized. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0016] Figure 1 It is a structural schematic diagram of the present application;

[0017] Figure 2 It is a top view schematic diagram of the slurry tank;

[0018] Figure 3 It is a sectional view schematic diagram of the reaction zone slurry tank along the direction of A-A; Figure 1

[0019] Figure 4 It is a sectional view schematic diagram of the reaction zone slurry tank along the direction of B-B; Figure 1

[0020] Figure 5 It is a sectional view schematic diagram of the spin-drying zone slurry tank along the direction of C-C; Figure 1

[0021] Figure 6 It is a sectional view schematic diagram of the cleaning zone slurry tank along the direction of D-D; Figure 1

[0022] In the drawing: 11, reaction screen cylinder area, 12, cleaning screen cylinder area, 13, spin-drying screen cylinder area, 21, reaction zone slurry tank, 22, cleaning zone slurry tank, 23, spin-drying zone slurry tank, 24, intermediate guide wall, 25, agitator hole. DETAILED DESCRIPTION

[0023] ​​​​The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the scope of the present application.

[0024] Please refer to Figures 1-6 The drum cylinder screen with the multi-level pulp pool structure provided in the embodiment can solve the technical problem of liquid resource waste mentioned in the background art. The drum cylinder screen with the multi-level pulp pool structure comprises a cylinder screen and a pulp pool. Reaction screen cylinder areas 11, cleaning screen cylinder areas 12 and spin-drying screen cylinder areas 13 are sequentially arranged in the cylinder screen along the direction of material movement. The reaction screen cylinder areas 11, the cleaning screen cylinder areas 12 and the spin-drying screen cylinder areas 13 are sequentially communicated. The pulp pool comprises reaction area pulp pools 21, cleaning area pulp pools 22 and spin-drying area pulp pools 23. The reaction area pulp pools 21 are arranged below the reaction screen cylinder areas 11 and receive the liquid medicine screened out by the reaction screen cylinder areas 11. The cleaning area pulp pools 22 are arranged below the cleaning screen cylinder areas 12 and receive the mixed liquid screened out by the cleaning screen cylinder areas 12. The spin-drying area pulp pools 23 are arranged below the spin-drying screen cylinder areas 13 and receive the mixed liquid screened out by the spin-drying screen cylinder areas 13.

[0025] Specifically, the cylinder screen is obliquely placed on the front and rear support roller devices. The reaction screen cylinder areas 11, the cleaning screen cylinder areas 12 and the spin-drying screen cylinder areas 13 are sequentially arranged in the cylinder screen along the direction of material movement. The reaction screen cylinder areas 11, the cleaning screen cylinder areas 12 and the spin-drying screen cylinder areas 13 are sequentially communicated. After the material is put into the entrance end of the cylinder screen, the material sequentially passes through the reaction screen cylinder areas 11, the cleaning screen cylinder areas 12 and the spin-drying screen cylinder areas 13 with the rotation of the cylinder screen. The reaction screen cylinder areas 11 in the cylinder screen are provided with liquid medicine spraying mechanisms. The liquid medicine spraying mechanisms are used for spraying liquid medicine on the material in the reaction screen cylinder areas 11. The cleaning screen cylinder areas 12 in the cylinder screen are provided with spraying and flushing mechanisms. The spraying and flushing mechanisms are used for spraying water or mixed liquid of medicine and water on the material in the cleaning screen cylinder areas 12, mainly playing a role of cleaning the material.

[0026] The pulp tank includes a reaction zone pulp tank 21, a cleaning zone pulp tank 22 and a spin-drying zone pulp tank 23. The reaction zone pulp tank 21 is arranged below the reaction screen drum zone 11. After the material is fully reacted with the chemical liquid sprayed by the chemical liquid spraying mechanism at the reaction screen drum zone 11, the material is loosened. With the rotation of the cylindrical screen, part of the chemical liquid is discharged from the screen hole of the reaction screen drum and falls into the reaction zone pulp tank 21. Another part of the chemical liquid travels with the material to the cleaning screen drum. The reaction zone pulp tank 21 is arranged below the reaction screen drum zone 11. When the material is at the cleaning screen drum zone 12, the spraying and flushing mechanism sprays water or a mixture of water and chemical liquid to the material. The material is loosened and separated again. At the same time, the chemical liquid carried by the material is diluted and cleaned. The residual chemical liquid and water are discharged through the screen hole of the cleaning screen drum zone 12 and fall into the cleaning zone pulp tank 22 below. A small amount of residual chemical liquid and water continues to travel with the material to the spin-drying screen drum zone 13. The spin-drying zone pulp tank 23 is arranged below the spin-drying screen drum zone 13. When the material enters the spin-drying screen drum zone 13, the material is lifted, slides and collides with the inner wall of the cylindrical screen in the spin-drying screen drum zone 13. The water and chemical liquid of the residues in the material are discharged through the screen hole of the spin-drying screen drum zone 13 and fall into the spin-drying zone pulp tank 23 below.

[0027] With the rotary drum cylindrical screen of the present embodiment, the material is subjected to different operations in the reaction screen drum zone 11, the cleaning screen drum zone 12 and the spin-drying screen drum zone 13. The concentration of the chemical liquid falling into the reaction zone pulp tank 21 from the reaction screen drum zone 11 is reduced less. After the impurities are cleaned, the chemical liquid can be collected and reused for the chemical liquid spraying mechanism. The mixture of water and chemical liquid falling into the cleaning zone pulp tank 22 from the cleaning screen drum zone 12 has a relatively high concentration of chemical liquid. After the water and impurities are separated, the mixture can also be reused for the chemical liquid spraying mechanism, which is beneficial to improve the utilization rate of the chemical liquid. The mixture of water and chemical liquid in the spin-drying zone pulp tank 23 has a relatively low content of chemical liquid. The significance of reusing the chemical liquid for the chemical liquid spraying mechanism is relatively low. However, after the impurities are removed, the mixture can be reused for the spraying and flushing mechanism, which not only saves water resources, but also reuses part of the chemical liquid to a certain extent, thereby saving the chemical liquid.

[0028] Please refer to Figures 2-4 In order to avoid the deposition of the chemical liquid in the reaction zone pulp tank 21 and affect the quality of the reused chemical liquid, in some embodiments, an intermediate flow guide wall 24 is arranged in the reaction zone pulp tank 21. The intermediate flow guide wall 24 is provided with a stirrer hole 25, and a stirrer is arranged in the stirrer hole 25. The stirring part of the stirrer is arranged obliquely in the reaction zone pulp tank 21 and drives the solution in the reaction zone pulp tank 21 to flow around the intermediate flow guide wall 24. Specifically, the stirrer is installed at the stirrer hole 25. The stirring part of the stirrer extends into the chemical liquid in the reaction zone pulp tank 21. The stirring of the stirrer can drive the chemical liquid to flow continuously in the reaction zone pulp tank 21. In some embodiments, the stirring part of the stirrer is inclined relative to the intermediate flow guide wall 24, which further improves the stirring and flow guiding effect of the chemical liquid in the reaction zone pulp tank 21.

[0029] As a further example, please refer to Figure 2 The intermediate guide wall 24 is herringbone-shaped.

[0030] Please refer to Figures 3-6 In some embodiments, the pool bottom of the reaction zone pulp pool 21, the cleaning zone pulp pool 22 and the spin-drying zone pulp pool 23 are all inclined surfaces. The reaction zone pulp pool 21, the cleaning zone pulp pool 22 and the spin-drying zone pulp pool 23 are all set as inclined surfaces, which is beneficial for cleaning, sewage discharge and other operations of the pulp pool, and is also beneficial for discharging the liquid medicine or water.

[0031] The water injection hole, the discharge hole and the sewage discharge hole are arranged on the pool wall of the reaction zone pulp pool 21, the pool wall of the cleaning zone pulp pool 22 and the pool wall of the spin-drying zone pulp pool 23. The manhole and the overflow hole are arranged on the pool wall of the reaction zone pulp pool 21, and the overflow hole is arranged on the pool wall of the cleaning zone pulp pool 22.

[0032] The water injection hole arranged at each part of the pulp pool is for facilitating water addition to the pulp pool for cleaning and other operations. The discharge hole and the sewage discharge hole are respectively used for discharging and sewage discharge. Generally, in order to improve the reaction effect of the material, the reaction screen cylinder area 11 of the cylindrical screen is relatively longer than the other two areas, and the reaction zone pulp pool 21 is relatively larger in specification. Therefore, the manhole is further arranged, which is convenient for the operator to enter the pulp pool for cleaning, sewage discharge and other operations. In addition, the liquid medicine content in the reaction zone pulp pool 21 and the cleaning zone pulp pool 22 is relatively high. In order to avoid waste, the reaction zone pulp pool 21 and the cleaning zone pulp pool 22 are further provided with overflow holes. When it is observed that the solution overflows at the overflow hole, the personnel need to timely transfer the solution out.

[0033] Since the cleaning zone pulp pool 22 and the spin-drying zone pulp pool 23 are relatively smaller than the reaction zone pulp pool 21, please refer to Figure 2 In some embodiments, the pulp pool comprises a combined pulp pool, the inside of the combined pulp pool is provided with a partition plate, and the partition plate divides the combined pulp pool into the cleaning zone pulp pool 22 and the spin-drying zone pulp pool 23. The overflow hole of the cleaning zone pulp pool 22 is not higher than the upper edge of the partition plate. The reaction zone pulp pool 21 is arranged between the two support roller devices of the cylindrical screen and is installed and fixed by the two support roller devices. The combined pulp pool is arranged at a position close to the reaction zone pulp pool 21 and is installed and fixed in cooperation with one support roller device.

[0034] In order to utilize the liquid medicine in the reaction zone pulp pool 21 in time, in some embodiments, the rotary drum cylindrical screen further comprises a first pumping mechanism. The first pumping mechanism is in communication with the reaction zone pulp pool 21 and pumps the liquid medicine in the reaction zone pulp pool 21 to the liquid medicine spraying mechanism of the reaction screen cylinder area 11. Specifically, the first pumping mechanism comprises a pumping pump and a pumping pipeline. The first pumping mechanism is in communication with the reaction zone pulp pool 21 and the liquid medicine spraying mechanism. The first pumping mechanism pumps the liquid medicine in the reaction zone pulp pool 21 to the liquid medicine spraying mechanism for direct utilization.

[0035] In order to utilize the mixture in the dewatering zone slurry tank 23 in time, in some embodiments, the dewatering zone slurry tank 23 is provided with a filtering mechanism and a second pumping mechanism, the second pumping mechanism pumps the mixture filtered by the filtering mechanism to the spray flushing mechanism provided in the cleaning screen cylinder zone 12. Specifically, the second pumping mechanism also includes a pumping pump and a pumping pipeline, the second pumping mechanism is communicated with the dewatering zone slurry tank 23 through the filtering mechanism, and the second pumping mechanism pumps the mixture filtered by the filtering mechanism to the spray flushing mechanism.

[0036] In the description of the present specification, the description referring to the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art, according to the technical scheme and the application concept of the present application, can make equivalent replacement or change within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A rotary drum cylinder screen having a multi-level pulp chest configuration comprising a cylinder screen and a pulp chest, characterized by: The cylinder screen is sequentially provided with a reaction screen cylinder area (11), a cleaning screen cylinder area (12) and a spin-drying screen cylinder area (13) along the material running direction, the reaction screen cylinder area (11), the cleaning screen cylinder area (12) and the spin-drying screen cylinder area (13) are sequentially communicated, and the pulp tank comprises a reaction area pulp tank (21), a cleaning area pulp tank (22) and a spin-drying area pulp tank (23), the reaction area pulp tank (21) is arranged below the reaction screen cylinder area (11) and receives the liquid medicine screened out by the reaction screen cylinder area (11), the cleaning area pulp tank (22) is arranged below the cleaning screen cylinder area (12) and receives the mixed liquid screened out by the cleaning screen cylinder area (12), and the spin-drying area pulp tank (23) is arranged below the spin-drying screen cylinder area (13) and receives the mixed liquid screened out by the spin-drying screen cylinder area (13).

2. A rotary drum cylinder screen having a multi-level pulp pool arrangement according to claim 1, characterized in that: An intermediate flow guide wall (24) is arranged in the reaction area pulp tank (21), the intermediate flow guide wall (24) is provided with a stirrer hole (25), and a stirrer is arranged in the stirrer hole (25), a stirring part of the stirrer is arranged in the reaction area pulp tank (21) in a tilted manner and drives the solution in the stirring area pulp tank to flow around the intermediate flow guide wall (24).

3. A rotary drum cylinder screen having a multi-level pulp pool arrangement according to claim 2, characterized in that: The intermediate flow guide wall (24) is in a herringbone shape.

4. A rotary drum cylinder screen having a multi-level pulp pool arrangement according to claim 3, characterized in that: The bottoms of the reaction area pulp tank (21), the cleaning area pulp tank (22) and the spin-drying area pulp tank (23) are all inclined surfaces.

5. A rotary drum cylinder screen having a multi-level pulp pool arrangement according to claim 4, characterized in that: Water injection holes, discharge holes and blowdown holes are arranged on the wall of the reaction area pulp tank (21), the wall of the cleaning area pulp tank (22) and the wall of the spin-drying area pulp tank (23), a manhole and an overflow hole are further arranged on the wall of the reaction area pulp tank (21), and an overflow hole is arranged on the wall of the cleaning area pulp tank (22).

6. A rotary drum cylinder screen having a multi-level pulp pool arrangement according to claim 5, characterized in that: The pulp tank comprises a combined pulp tank, a partition is arranged in the combined pulp tank, and the partition divides the combined pulp tank into the cleaning area pulp tank (22) and the spin-drying area pulp tank (23), and the overflow hole of the cleaning area pulp tank (22) is not higher than the upper edge of the partition.

7. A rotary drum cylinder screen having a multi-level pulp pool arrangement according to claim 1, characterized in that: The first pumping mechanism is in communication with the reaction area pulp tank (21) and pumps the liquid medicine in the reaction area pulp tank (21) to the liquid medicine spraying mechanism of the reaction screen cylinder area (11).

8. A rotary drum cylinder screen having a multi-level pulp chest arrangement according to claim 7, characterised in that: The spin-drying area pulp tank (23) is provided with a filtering mechanism and a second pumping mechanism, and the second pumping mechanism pumps the mixed liquid filtered by the filtering mechanism to the spraying and flushing mechanism arranged in the cleaning screen cylinder area (12).

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