Method for realizing efficient and energy-saving centrifugal dewatering by utilizing speed of fourdrinier machine

Abstract

The invention relates to a method for realizing high-efficiency and energy-saving centrifugal dewatering by utilizing the speed of a fourdrinier papermaking machine, which comprises the following steps of: forming centrifugal force through guiding and steering, throwing off white water by utilizing the characteristics of a forming net, and keeping fibers on the forming net to achieve the purpose of centrifugal dewatering, so that the consumption of vacuum is reduced, and energy conservation and emission reduction are realized; after centrifugal dewatering, vacuum dewatering is carried out on the top net and the bottom, so that the loss of fibers can be reduced, and the quality of finished paper is improved; by adjusting the centrifugal force, the magnitude of the centrifugal force can be effectively controlled, and damage to fibers is avoided; therefore, not only is the dehydration efficiency improved, but also the quality of fibers is ensured, and the quality of finished paper is further improved; a variable frequency speed regulation technology is adopted to regulate the speed of the paper machine and regulate the strength and time of centrifugal force, so that the centrifugal force is effectively controlled. The problems that in the aspect of adapting to different types of fourdrinier paper machines, certain limitation exists, dehydration cannot be effectively conducted under the high-speed or low-speed condition, and the production efficiency is affected are solved.

Description

Technical Field

[0001] The invention relates to the field of papermaking machines, and in particular to a method for realizing efficient and energy-saving centrifugal dehydration by utilizing the speed of a Fourdrinier papermaking machine. Background Art

[0002] In the prior art, the field of papermaking machinery is a technology-intensive industry, involving multiple disciplines such as mechanical engineering, fluid mechanics, and materials science. Among them, the fourdrinier papermaking machine is a widely used papermaking equipment. Its working principle is that the headbox spreads the fiber suspension evenly on the forming net, and finally forms paper through processes such as dehydration and drying. In the dehydration process, centrifugal dehydration technology is an important method, which uses centrifugal force to separate fibers from water, thereby improving the quality of paper. At the same time, the field of energy-saving technology is also constantly developing, committed to improving energy utilization efficiency and reducing energy consumption. 2) Solutions of the prior art: The existing network dehydration technology is mainly through vacuum dehydration, that is, applying vacuum on the forming net, and using the negative pressure generated by the vacuum to extract water, thereby realizing the separation of fiber and water. The main equipment of this technology includes vacuum source equipment and vacuum box. However, this technology has some problems, such as high energy consumption and serious fiber loss. 3) Problems of the prior art: The existing fourdrinier paper machine dehydration technology has some problems and limitations in practical applications. First, since vacuum dehydration requires a lot of energy, the energy consumption is high, which not only increases production costs, but also does not comply with current energy conservation and emission reduction policies. Secondly, the existing top-net dehydration technology easily leads to the loss of fine fibers, affecting the physical strength of the finished paper. In addition, the existing technology lacks an effective control method for adjusting the size of the centrifugal force, which easily causes damage to the fibers, affecting the quality of the fibers and the quality of the finished paper. Finally, the existing centrifugal dehydration technology has certain limitations in adapting to different types of long-net papermaking machines. It cannot effectively dehydrate at high or low speeds, affecting production efficiency. Summary of the invention

[0003] The embodiments of the present application provide a method for realizing efficient and energy-saving centrifugal dehydration by utilizing the speed of a long-net papermaking machine, thereby solving the problem in the prior art that vacuum dehydration requires a large amount of energy, resulting in high energy consumption, which not only increases production costs but also does not comply with current energy conservation and emission reduction policies. Secondly, the existing top-net dehydration technology easily leads to the loss of fine fibers, affecting the physical strength of the finished paper. In addition, the existing technology lacks an effective control method for adjusting the magnitude of the centrifugal force, which easily causes damage to the fibers, affecting the quality of the fibers and the quality of the finished paper. Finally, the existing centrifugal dehydration technology has certain limitations in adapting to different types of long-net papermaking machines, and cannot effectively dehydrate at high or low speeds, affecting production efficiency.

[0004] The technical solution adopted in the embodiments of the present application is as follows.

[0005] A method for realizing efficient and energy-saving centrifugal dehydration by utilizing the speed of a Fourdrinier papermaking machine, comprising S1, forming centrifugal force by guiding the steering, utilizing the characteristics of a forming net, throwing out white water, and leaving fibers on the forming net, thereby achieving the purpose of centrifugal dehydration, thereby reducing vacuum consumption and realizing energy conservation and emission reduction;

[0006] S2. After centrifugal dehydration, vacuum dehydration is performed on the top screen and the bottom, which can reduce the loss of fibers and improve the quality of paper;

[0007] S3. By adjusting the centrifugal force, the centrifugal force can be effectively controlled to avoid damage to the fiber; this not only improves the dehydration efficiency, but also ensures the quality of the fiber and further improves the quality of the finished paper;

[0008] S4. Use frequency conversion speed regulation technology to adjust the paper machine speed, to adjust the strength and time of centrifugal force, so as to achieve effective control of centrifugal force.

[0009] As a further improvement of the above technical solution: in the specific operation of S1, the running speed of the fourdrinier papermaking machine is controlled at 500-1500 m / min. By adjusting the running speed of the papermaking machine, the magnitude of the centrifugal force can be effectively controlled.

[0010] As a further improvement of the above technical solution: in the specific operation of S2, the vacuum dehydration pressure of the top net is controlled at 0.01-0.03MPa, and the vacuum dehydration pressure of the bottom net is controlled at 0.03-0.05MPa.

[0011] As a further improvement of the above technical solution: In the specific operation of S3, the process flow of centrifugal dehydration can be optimized by adjusting the running speed of the paper machine and changing the structure, material, surface grooves, etc. of the guide roller, so as to achieve effective control of the centrifugal force.

[0012] As a further improvement of the above technical solution: in the specific operation of S4, the frequency range of the variable frequency speed regulation technology is controlled at 30-50Hz. By adjusting the frequency, the intensity and time of the centrifugal force can be effectively controlled.

[0013] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0014] 1. Energy saving and consumption reduction: The present invention utilizes the fast running speed of the Fourdrinier papermaking machine, guides the steering to form centrifugal force, utilizes the characteristics of the forming net, throws out the white water, and leaves the fibers on the forming net, achieving the purpose of centrifugal dehydration, thereby reducing the consumption of vacuum. This not only reduces the vacuum suction kinetic energy consumption, reduces production costs, but also improves energy utilization efficiency, which is in line with the current energy conservation and emission reduction policies. The existing technology mainly relies on vacuum dehydration, which has high energy consumption, increases production costs, and does not comply with energy conservation and emission reduction policies.

[0015] 2. Reduce fiber loss: The existing top net vacuum dehydration method easily leads to the loss of fine fibers, affecting the physical strength of the finished paper. However, the present invention performs vacuum dehydration of the top net and the bottom after centrifugal dehydration, which can reduce fiber loss and improve the quality of the finished paper. At the same time, due to the centrifugal force during the centrifugal dehydration process, the fibers are more tightly bound, which is also beneficial to improve the physical strength of the finished paper. However, the existing technology easily leads to the loss of fine fibers during the centrifugal dehydration process, affecting the physical strength of the finished paper.

[0016] 3. Effective control of centrifugal force: The centrifugal dehydration technology of the present invention can effectively control the magnitude of the centrifugal force through reasonable design and adjustment of the centrifugal force to avoid damage to the fibers. This not only improves the efficiency of dehydration, but also ensures the quality of the fibers, further improving the quality of the finished paper. However, the prior art lacks an effective control method for adjusting the magnitude of the centrifugal force, which easily causes damage to the fibers, affecting the quality of the fibers and the quality of the finished paper.

[0017] 4. Strong adaptability: The centrifugal dehydration technology of the present invention can be applied to different types of Fourdrinier papermaking machines and has strong adaptability. It can effectively dehydrate under high or low speed conditions, thereby improving production efficiency. However, the prior art has certain limitations in adapting to different types of Fourdrinier papermaking machines and cannot effectively dehydrate under high or low speed conditions, thereby affecting production efficiency.

[0018] 5. Easy to operate and control: The centrifugal dehydration technology of the present invention is simple to operate and easy to control, does not require complex equipment and processes, and is easy to promote and apply. At the same time, since the vacuum suction is reduced, the difficulty of operation is also reduced, and the safety of production is improved. The existing technology is complicated to operate and difficult to control, and requires complex equipment and processes, which increases the difficulty of operation and reduces the safety of production. DETAILED DESCRIPTION

[0019] The embodiments of the present application provide a method for realizing efficient and energy-saving centrifugal dehydration by utilizing the speed of a long-net papermaking machine, thereby solving the problem in the prior art that vacuum dehydration requires a large amount of energy, resulting in high energy consumption, which not only increases production costs but also does not comply with current energy conservation and emission reduction policies. Secondly, the existing top-net dehydration technology easily leads to the loss of fine fibers, affecting the physical strength of the finished paper. In addition, the existing technology lacks an effective control method for adjusting the magnitude of the centrifugal force, which easily causes damage to the fibers, affecting the quality of the fibers and the quality of the finished paper. Finally, the existing centrifugal dehydration technology has certain limitations in adapting to different types of long-net papermaking machines, and cannot effectively dehydrate at high or low speeds, affecting production efficiency.

[0020] The technical solution in the embodiment of the present application is to solve the above problems, and the overall idea is as follows

[0021] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with specific implementation methods.

[0022] A method for realizing efficient and energy-saving centrifugal dehydration by utilizing the speed of a Fourdrinier papermaking machine, comprising S1, forming centrifugal force by guiding the steering, utilizing the characteristics of a forming net, throwing out white water, and leaving fibers on the forming net, thereby achieving the purpose of centrifugal dehydration, thereby reducing vacuum consumption and realizing energy conservation and emission reduction;

[0023] S2. After centrifugal dehydration, vacuum dehydration is performed on the top screen and the bottom, which can reduce the loss of fibers and improve the quality of paper;

[0024] S3. By adjusting the centrifugal force, the centrifugal force can be effectively controlled to avoid damage to the fiber; this not only improves the dehydration efficiency, but also ensures the quality of the fiber and further improves the quality of the finished paper;

[0025] S4. Use frequency conversion speed regulation technology to adjust the paper machine speed, to adjust the strength and time of centrifugal force, so as to achieve effective control of centrifugal force.

[0026] In the specific operation of S1, the running speed of the fourdrinier papermaking machine is controlled at 500-1500 m / min. By adjusting the running speed of the papermaking machine, the magnitude of the centrifugal force can be effectively controlled.

[0027] In the specific operation of S2, the vacuum dehydration pressure of the top net is controlled at 0.01-0.03MPa, and the vacuum dehydration pressure of the bottom net is controlled at 0.03-0.05MPa.

[0028] In the specific operation of S3, the process flow of centrifugal dehydration can be optimized by adjusting the running speed of the paper machine and changing the structure, material, surface grooves, etc. of the guide roller, thereby achieving effective control of the centrifugal force.

[0029] In the specific operation of S4, the frequency range of variable frequency speed regulation technology is controlled at 30-50Hz. By adjusting the frequency, the intensity and time of centrifugal force can be effectively controlled.

[0030] Due to the advanced nature of the technical solution, it can be widely used in the fields of papermaking machinery, centrifugal dehydration equipment and energy-saving technology. First, in the field of papermaking machinery, the centrifugal dehydration technology of the present invention can effectively improve the quality of paper, while reducing energy consumption and improving energy utilization efficiency. For papermaking enterprises, this can not only reduce production costs, but also improve market competitiveness. In addition, since the centrifugal dehydration technology of the present invention has strong adaptability and can be applied to different types of long-net papermaking machines, it has broad application prospects in the field of papermaking machinery. Secondly, in the field of centrifugal dehydration equipment, the centrifugal dehydration technology of the present invention can effectively control the size of the centrifugal force, avoid damage to the fiber, and improve the efficiency and effect of dehydration. For centrifugal dehydration equipment manufacturers, this can improve the performance and quality of the product and meet market demand. In addition, since the centrifugal dehydration technology of the present invention is simple to operate and easy to control, it has broad application prospects in the field of centrifugal dehydration equipment. Finally, in the field of energy-saving technology, the centrifugal dehydration technology of the present invention can reduce the consumption of vacuum and achieve energy saving and emission reduction. This can play a positive role in promoting energy-saving and emission reduction policies. In addition, since the centrifugal dehydration technology of the present invention complies with the current energy conservation and emission reduction policy, it has broad application prospects in the field of energy-saving technology. In general, the centrifugal dehydration technology of the present invention has broad application prospects in the fields of papermaking machinery, centrifugal dehydration equipment and energy-saving technology, with large market demand and good commercial value.

[0031] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0032] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for realizing efficient and energy-saving centrifugal dewatering by utilizing the speed of a Fourdrinier papermaking machine, characterized in that: Including S1, by guiding the steering to form centrifugal force, using the characteristics of the forming net, the white water is thrown out, and the fibers are retained on the forming net, so as to achieve the purpose of centrifugal dehydration, thereby reducing the consumption of vacuum and realizing energy saving and emission reduction; S2. After centrifugal dehydration, vacuum dehydration is performed on the top screen and the bottom, which can reduce the loss of fibers and improve the quality of paper; S3. By adjusting the centrifugal force, the centrifugal force can be effectively controlled to avoid damage to the fiber; this not only improves the dehydration efficiency, but also ensures the quality of the fiber and further improves the quality of the finished paper; S4. Use frequency conversion speed regulation technology to adjust the paper machine speed, to adjust the strength and time of centrifugal force, so as to achieve effective control of centrifugal force.

2. The method for realizing high-efficiency and energy-saving centrifugal dehydration by utilizing the speed of a Fourdrinier papermaking machine as claimed in claim 1, characterized in that: In the specific operation of S1, the running speed of the fourdrinier papermaking machine is controlled at 500-1500 m / min. By adjusting the running speed of the papermaking machine, the magnitude of the centrifugal force can be effectively controlled.

3. The method for realizing high-efficiency and energy-saving centrifugal dehydration by utilizing the speed of a Fourdrinier papermaking machine as claimed in claim 1, characterized in that: In the specific operation of S2, the vacuum dehydration pressure of the top net is controlled at 0.01-0.03MPa, and the vacuum dehydration pressure of the bottom net is controlled at 0.03-0.05MPa.

4. The method for realizing high-efficiency and energy-saving centrifugal dehydration by utilizing the speed of a Fourdrinier papermaking machine as claimed in claim 1, characterized in that: In the specific operation of S3, the process flow of centrifugal dehydration can be optimized by adjusting the running speed of the paper machine and changing the structure, material, surface grooves, etc. of the guide roller, thereby achieving effective control of the centrifugal force.

5. The method for realizing high-efficiency and energy-saving centrifugal dehydration by utilizing the speed of a Fourdrinier papermaking machine as claimed in claim 1, characterized in that: In the specific operation of S4, the frequency range of variable frequency speed regulation technology is controlled at 30-50Hz. By adjusting the frequency, the intensity and time of centrifugal force can be effectively controlled.