Multi-pulping-mechanism collaborative pulping system and pulping method
By designing a collaborative pulping system for multi-reinforcement mechanisms, the coordinated work of two disk mills and transition pulp pools is used to solve the problem of pulp-beating and the problem of pulp-beating is improved, and the pulping efficiency and carton strength are improved.
Patent Information
- Application Number
- CN202510043606.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2025-05-09
AI Technical Summary
The prior art is difficult to effectively control the decomposition degree during the pulp beating process, resulting in the decomposition degree of some slurries being too high or too low, affecting the overall strength of the carton, and it is difficult to meet the refining efficiency of different needs when the amount of raw pulp is different.
A collaborative slurry refining system of multi-refining mechanisms is designed, including two disk mills and a transition slurry pool. Through the opening and closing control of the valve, the two disk mills work separately, alternately or simultaneously, meet the needs of different slurry fibers and slurry amounts, and the slurry is reduced through the transition slurry pool.
It improves the slurry efficiency, can meet the needs of different slurry fibers and slurry quantity, ensures the strength and production efficiency of the carton, and avoids the problem of uneven decomposition.
Smart Images
Figure CN119956622A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of papermaking equipment, and in particular to a multi-refining mechanism cooperative refining system and a refining method. Background Art
[0002] In the production process of packaging cartons, the change in the beating degree is directly related to the strength of the paper, thus affecting the overall strength of the carton. Therefore, in the pulping process, strictly controlling the beating degree of the pulp is an important factor in determining the strength of the carton.
[0003] At present, the disc refiner is usually used for pulp beating. The specific operation process is to send the pulp into the disc refiner through the pump body, and then send the pulp into the post-grinding pulp pool for storage after the disc refiner is refined, waiting for the next process. However, due to the differences in pulp fibers, some raw pulps with low beating degrees can meet the standards after only one refining; while some raw pulps with high beating degrees need to be refined multiple times to meet the standards. Therefore, if one disc refiner is designed, the beating degree of some pulps will be too high; if multiple disc refiners are designed to be connected in series, the pulping efficiency will be low, making it difficult to improve the production efficiency of the enterprise.
[0004] On the other hand, when the amount of raw pulp is low, only one disc refiner can meet the refining demand, while when the amount of raw pulp is large, multiple disc refiners need to work in parallel to ensure production capacity. Based on this, in order to meet the requirements of different pulp fibers for the number of refining times and the requirements of different raw pulp amounts for the number of disc refiners, we proposed a multi-refining mechanism collaborative refining system and refining method to solve the above drawbacks. Summary of the invention
[0005] The object of the present invention is to provide a multi-refining mechanism cooperative refining system and a refining method, so as to solve the problems raised in the above-mentioned background technology.
[0006] The present invention is realized by the following technical scheme: a multi-refining mechanism cooperative refining system, comprising: a pulp inlet pool, the pulp inlet pool is used to accommodate pulp to be refined;
[0007] A post-grinding pulp tank, wherein the post-grinding pulp tank is used to contain the ground pulp;
[0008] A first disc refiner, wherein the feed port of the first disc refiner is connected to the discharge end of the feed pulp pool, and the discharge port of the first disc refiner is connected to the post-grinding pulp pool;
[0009] A second disc refiner, wherein the feed port of the second disc refiner is connected to the discharge end of the feed pulp pool, and the discharge port of the second disc refiner is connected to the post-grinding pulp pool;
[0010] Wherein, the discharge port of the first disc grinder is connected to the feed port of the second disc grinder.
[0011] Optionally, it also includes a first pipeline and a first pump body, wherein the two ends of the first pipeline are respectively connected to the feed port of the pulp inlet pool and the feed port of the post-grinding pulp pool, the input end of the first pump body is connected to the discharge port of the pulp inlet pool, and the output end of the first pump body is connected to the first pipeline through a second pipeline.
[0012] Optionally, a first valve, a second valve and a third valve are sequentially provided on the first pipeline extending from one end of the pulp inlet tank to one end of the post-grinding pulp tank, and the first valve is located between the feed port of the pulp inlet tank and the second pipeline.
[0013] Optionally, a third pipeline is provided at the feed port of the first disc mill, the third pipeline is connected to the first pipeline, a fourth valve is provided on the third pipeline, and the connection point between the third pipeline and the first pipeline is located between the first valve and the second valve.
[0014] Optionally, a fourth pipeline is provided at the discharge port of the first disc refiner, a fifth valve is provided on the fourth pipeline, the fourth pipeline is connected to the first pipeline, and the connection point between the fourth pipeline and the first pipeline is located between the third valve and the post-grinding pulp pool.
[0015] Optionally, a fifth pipeline is provided at the feed port of the second disc mill, the fifth pipeline is connected to the first pipeline, and the connection point between the fifth pipeline and the first pipeline is located between the second valve and the third valve; a sixth pipeline is provided at the discharge port of the second disc mill, the sixth pipeline is connected to the fourth pipeline, a sixth valve is provided on the sixth pipeline, and the connection point between the sixth pipeline and the fourth pipeline is located on the side of the fifth valve away from the first disc mill.
[0016] Optionally, it also includes a transition slurry pool, the feed port of the transition slurry pool is connected to the fourth pipeline through a seventh pipeline, the seventh pipeline is provided with a seventh valve, and the connection point of the seventh pipeline and the fourth pipeline is located on the side of the fifth valve close to the first disc mill; the discharge port of the transition slurry pool is provided with an eighth pipeline through the second pump body, the eighth pipeline is connected to the first pipeline, the eighth pipeline is provided with an eighth valve, and the connection point of the eighth pipeline and the first pipeline is located between the second valve and the third valve.
[0017] Optionally, a ninth pipeline is connected between the first pipeline and the fourth pipeline, a ninth valve is provided on the ninth pipeline, one end of the ninth pipeline is located between the second valve and the third valve, and the other end is located on the side of the fifth valve close to the first disc grinder.
[0018] The present invention also provides a multi-refining mechanism cooperative refining method, which is applicable to the multi-refining mechanism cooperative refining system mentioned above, and comprises the following steps:
[0019] First, open the first pump body and the first valve, and close the second valve and the fourth valve to allow the slurry to flow back;
[0020] After the flow rate is normal, if the first disc grinding machine needs to work alone, open the fourth valve and the fifth valve, and close all other valves;
[0021] If the second disc grinder needs to work alone, open the second valve and the sixth valve, and close all other valves;
[0022] If two disc grinders are required to work in series, open the fourth valve, the ninth valve and the sixth valve, and close all other valves;
[0023] If two disc grinders are required to work in parallel, open the second valve, the fourth valve, the fifth valve and the sixth valve, and close all other valves.
[0024] Optionally, when two disc grinders are required to work in series, the fourth valve, the eighth valve, the sixth valve, the seventh valve and the second pump body may be opened, and all other valves may be closed.
[0025] Compared with the prior art, the present invention provides a multi-refining mechanism cooperative refining system and a refining method, which have the following beneficial effects:
[0026] 1. The present invention has two disc refiners, and the two disc refiners can be used alone, in series or in parallel, thereby meeting the requirements of different pulp fibers and different raw pulp amounts for the number of refining times, and helping to improve the refining efficiency;
[0027] 2. The present invention also has a transition slurry pool, which can temporarily stop and reduce the pressure of the slurry after grinding before entering the next grinding, avoiding the problem of excessive pressure in the second disc mill caused by continuous grinding, resulting in too short grinding time, thereby helping to fully improve the grinding effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 It is a schematic diagram of the structure of the present invention.
[0029] In the figure: 1, inlet slurry pool; 2, post-grinding slurry pool; 3, first disc grinding mill; 4, second disc grinding mill; 5, first pipeline; 6, first pump body; 7, first valve; 8, second valve; 9, third valve; 10, second pipeline; 11, third pipeline; 12, fourth valve; 13, ninth valve; 14, fourth pipeline; 15, fifth valve; 16, fifth pipeline; 17, sixth pipeline; 18, transition slurry pool; 19, seventh pipeline; 20, seventh valve; 21, eighth pipeline; 22, eighth valve; 23, ninth pipeline; 24, sixth valve; 25, second pump body. DETAILED DESCRIPTION
[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0031] Example 1: Please refer to Figure 1 The embodiment of the present application proposes a multi-refining mechanism cooperative refining system, comprising: a pulp inlet pool 1, a post-grinding pulp pool 1, a first disc refiner 1 and a second disc refiner 1, wherein the pulp inlet pool 1 is used to accommodate the pulp to be refined; the post-grinding pulp pool 2 is used to accommodate the ground pulp; the feed ports of the first disc refiner 3 and the second disc refiner 4 are both connected to the discharge end of the pulp inlet pool 1, and the discharge ports of the first disc refiner 3 and the second disc refiner 4 are both connected to the post-grinding pulp pool 2; and the discharge port of the first disc refiner 3 is connected to the feed port of the second disc refiner 4.
[0032] Specifically, the present embodiment further includes a first pipeline 5 and a first pump body 6. The two ends of the first pipeline 5 are respectively connected to the feed port of the feed pool 1 and the feed port of the post-grinding pool 2. The input end of the first pump body 6 is connected to the discharge port of the feed pool 1. The output end of the first pump body 6 is connected to the first pipeline 5 through the second pipeline 10. The first pipeline 5 is sequentially provided with a first valve 7, a second valve 8 and a third valve 9 extending from one end of the feed pool 1 to one end of the post-grinding pool 2. The first valve 7 is located between the feed port of the feed pool 1 and the second pipeline 10. It should be noted that the connection point between the second pipeline 10 and the first pipeline 5 is located between the first valve 7 and the second valve 8.
[0033] Further, a third pipeline 11 is provided at the feed port of the first disc refiner 3, the third pipeline 11 is connected to the first pipeline 5, a fourth valve 12 is provided on the third pipeline 11, and the connection point between the third pipeline 11 and the first pipeline 5 is located between the first valve 7 and the second valve 8. A fourth pipeline 14 is provided at the discharge port 13 of the first disc refiner 3, a fifth valve 15 is provided on the fourth pipeline 14, the fourth pipeline 14 is connected to the first pipeline 5, and the connection point between the fourth pipeline 14 and the first pipeline 5 is located between the third valve 9 and the post-grinding pulp tank 2.
[0034] A fifth pipeline 16 is provided at the feed port of the second disc mill 4, and the fifth pipeline 16 is connected to the first pipeline 5, and the connection point between the fifth pipeline 16 and the first pipeline 5 is located between the second valve 8 and the third valve 9; a sixth pipeline 17 is provided at the discharge port of the second disc mill 4, and the sixth pipeline 17 is connected to the fourth pipeline 14, and a sixth valve 24 is provided on the sixth pipeline 17, and the connection point between the sixth pipeline 17 and the fourth pipeline 14 is located on the side of the fifth valve 15 away from the first disc mill 3.
[0035] This embodiment also includes a transition slurry tank 18, the feed port 1 of the transition slurry tank 18 is connected to the fourth pipeline 14 through the seventh pipeline 19, the seventh pipeline 19 is provided with a seventh valve 20, and the connection point between the seventh pipeline 19 and the fourth pipeline 14 is located on the side of the fifth valve 15 close to the first disc mill 3; the discharge port of the transition slurry tank 18 is provided with an eighth pipeline 21 through the second pump body 25, the eighth pipeline 21 is connected to the first pipeline 5, the eighth pipeline 21 is provided with an eighth valve 22, and the connection point between the eighth pipeline 21 and the first pipeline 5 is located between the second valve 8 and the third valve 9. The function of the transition slurry tank 18 is to collect the slurry ground by the first disc mill 3 so that the slurry can enter the second disc mill 4 after the pressure is reduced.
[0036] Furthermore, a ninth pipeline 23 is connected between the first pipeline 5 and the fourth pipeline 14, and a ninth valve 13 is provided on the ninth pipeline 23. One end of the ninth pipeline 23 is located between the second valve 8 and the third valve 9, and the other end is located on the side of the fifth valve 15 close to the first disc refiner 3. The function of the ninth valve 13 is to control the direction of the slurry after grinding in the first disc refiner 3, that is, to control the slurry to enter the post-grinding pulp tank 2 or the second disc refiner 4.
[0037] In summary, this embodiment can control the two disc refiners to work independently, alternately or simultaneously by opening and closing multiple valves, so as to adapt to different pulp fibers and different raw pulp amounts.
[0038] Embodiment 2: This embodiment of the present application proposes a multi-refining mechanism cooperative refining method, which is applicable to a multi-refining mechanism cooperative refining system in Embodiment 1, and includes the following steps:
[0039] First, open the first pump body 6 and the first valve 7, and close the second valve 8 and the fourth valve 12 to allow the slurry to flow back; because the flow in the pipeline has not yet fully reached the standard when the first pump body 6 is just started, if the slurry is directly sent to the disc refiner at this time, it will cause the beating degree of the slurry to vary greatly, so the second valve 8 and the fourth valve 12 are closed to allow the slurry to flow back to the slurry inlet pool 1.
[0040] After the flow rate is normal, if the first disc grinder 3 needs to work alone, the fourth valve 12 and the fifth valve 15 are opened, and all other valves are closed; then the ground slurry can all enter the post-grinding slurry pool 2.
[0041] If the second disc refiner 4 is required to work alone, the second valve 8 and the sixth valve 24 are opened, and all other valves are closed; then the ground slurry can all enter the post-grinding slurry pool 2.
[0042] Obviously, the first disc mill 3 and the second disc mill 4 working alone are suitable for the situation where the amount of raw materials is low and the slurry beating degree is low. At this time, only one disc mill working alone can meet the slurry grinding requirements.
[0043] If two disc refiners are required to work in series, open the fourth valve 12, the ninth valve 13 and the sixth valve 24, and close all other valves; at this time, the first disc refiner 3 and the second disc refiner 4 work in series, which is suitable for raw pulp with a higher pulp beating degree.
[0044] If two disc refiners need to work in parallel, open the second valve 8, the fourth valve 12, the fifth valve 15 and the sixth valve 24, and close all other valves. At this time, the first disc refiner 3 and the second disc refiner 4 work in parallel, which is suitable for the case where the amount of raw pulp is large and is used to improve the grinding efficiency.
[0045] In addition, it is worth mentioning that when the two disc refiners work in series, the slurry pressure flowing out of the first disc refiner 3 is relatively high. If it is directly passed into the second disc refiner 4, the slurry pressure in the second disc refiner 4 will be higher than the standard value, thereby shortening the grinding time and making the slurry not fully ground in the second disc refiner 4. In order to solve the above problem, the fourth valve 12, the eighth valve 22, the sixth valve 24, the seventh valve 20 and the second pump body 25 can also be opened, and all other valves can be closed. At this time, after being ground by the first disc refiner 3, the slurry enters the transition slurry pool 18 for temporary rest to reduce the pressure, and then the second pump body 25 sends the slurry to the second disc refiner 4 for secondary grinding to fully improve the grinding effect. Finally, the slurry after secondary grinding enters the post-grinding slurry pool 2.
[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A multi-refining mechanism cooperative refining system, characterized in that: include: A slurry inlet tank (1), the slurry inlet tank (1) being used to accommodate slurry to be ground; A post-grinding pulp tank (2), wherein the post-grinding pulp tank (2) is used to contain the ground pulp; a first disc refiner (3), wherein the feed port of the first disc refiner (3) is connected to the discharge end of the feed stock tank (1), and the discharge port of the first disc refiner (3) is connected to the post-grinding stock tank (2); a second disc refiner (4), wherein the feed port of the second disc refiner (4) is connected to the discharge end of the feed stock tank (1), and the discharge port of the second disc refiner (4) is connected to the post-grinding stock tank (2); Wherein, the discharge port of the first disc grinder (3) is connected to the feed port of the second disc grinder (4).
2. The multi-refining mechanism cooperative refining system according to claim 1, characterized in that: It also comprises a first pipeline (5) and a first pump body (6), wherein the two ends of the first pipeline (5) are respectively connected to the feed port of the pulp inlet pool (1) and the feed port of the post-grinding pulp pool (2), the input end of the first pump body (6) is connected to the discharge port of the pulp inlet pool (1), and the output end of the first pump body (6) is connected to the first pipeline (5) via a second pipeline (10).
3. The multi-refining mechanism cooperative refining system according to claim 2, characterized in that: The first pipeline (5) is provided with a first valve (7), a second valve (8) and a third valve (9) in sequence, extending from one end of the pulp inlet tank (1) to one end of the post-grinding pulp tank (2); the first valve (7) is located between the feed port of the pulp inlet tank (1) and the second pipeline (10).
4. The multi-refining mechanism cooperative refining system according to claim 3, characterized in that: A third pipeline (11) is provided at the feed inlet of the first disc grinder (3), the third pipeline (11) is connected to the first pipeline (5), a fourth valve (12) is provided on the third pipeline (11), and the connection point between the third pipeline (11) and the first pipeline (5) is located between the first valve (7) and the second valve (8).
5. The multi-refining mechanism cooperative refining system according to claim 4, characterized in that: A fourth pipeline (14) is provided at the discharge port of the first disc refiner (3), a fifth valve (15) is provided on the fourth pipeline (14), the fourth pipeline (14) is connected to the first pipeline (5), and the connection point between the fourth pipeline (14) and the first pipeline (5) is located between the third valve (9) and the post-grinding pulp tank (2).
6. The multi-refining mechanism cooperative refining system according to claim 5, characterized in that: The feed port of the second disc grinder (4) is provided with a fifth pipeline (16), the fifth pipeline (16) is connected to the first pipeline (5), and the connection point between the fifth pipeline (16) and the first pipeline (5) is located between the second valve (8) and the third valve (9); the discharge port of the second disc grinder (4) is provided with a sixth pipeline (17), the sixth pipeline (17) is connected to the fourth pipeline (14), a sixth valve (24) is provided on the sixth pipeline (17), and the connection point between the sixth pipeline (17) and the fourth pipeline (14) is located on a side of the fifth valve (15) away from the first disc grinder (3).
7. The multi-refining mechanism cooperative refining system according to claim 6, characterized in that: The invention also comprises a transition pulp pool (18), wherein the feed port of the transition pulp pool (18) is connected to the fourth pipeline (14) via a seventh pipeline (19), the seventh pipeline (19) is provided with a seventh valve (20), and the connection point between the seventh pipeline (19) and the fourth pipeline (14) is located on the side of the fifth valve (15) close to the first disc mill (3); the discharge port of the transition pulp pool (18) is provided with an eighth pipeline (21) via a second pump body (25), the eighth pipeline (21) is connected to the first pipeline (5), the eighth pipeline (21) is provided with an eighth valve (22), and the connection point between the eighth pipeline (21) and the first pipeline (5) is located between the second valve (8) and the third valve (9).
8. The multi-refining mechanism cooperative refining system according to claim 7, characterized in that: A ninth pipeline (23) is connected between the first pipeline (5) and the fourth pipeline (14), a ninth valve (13) is provided on the ninth pipeline (23), one end of the ninth pipeline (23) is located between the second valve (8) and the third valve (9), and the other end of the ninth pipeline (23) is located on a side of the fifth valve (15) close to the first disc grinder (3).
9. A multi-refining mechanism cooperative refining method, applicable to a multi-refining mechanism cooperative refining system according to claim 8, characterized in that: The following steps are involved: First, the first pump body (6) and the first valve (7) are opened, and the second valve (8) and the fourth valve (12) are closed to allow the slurry to flow back; After the flow rate is normal, if the first disc grinding machine (3) needs to work alone, the fourth valve (12) and the fifth valve (15) are opened, and all other valves are closed; If the second disc grinder (4) is required to work alone, the second valve (8) and the sixth valve (24) are opened, and all other valves are closed; If two disc grinders are required to work in series, the fourth valve (12), the ninth valve (13) and the sixth valve (24) are opened, and all other valves are closed; If two disc grinders are required to work in parallel, the second valve (8), the fourth valve (12), the fifth valve (15) and the sixth valve (24) are opened, and all other valves are closed.
10. A multi-refining mechanism collaborative refining method according to claim 9, characterized in that: Also includes: When two disc grinders are required to work in series, the fourth valve (12), the eighth valve (22), the sixth valve (24), the seventh valve (20) and the second pump body (25) can be opened, and all other valves can be closed.