A paper machine flow system buffer tank spray device

Abstract

The utility model relates to a paper machine flow feeding system buffer tank spraying device. It solves the existing buffer tank inner wall on the accumulated pulp and other technical problems. Including the buffer tank body of inner chamber, the buffer tank body lower extreme centre is equipped with with the inner chamber intercommunication's pulp inlet pipe, the buffer tank body lower extreme outside is equipped with with the inner chamber intercommunication's pulp outlet pipe, is equipped with the first annular spraying pipe in the buffer tank body in the pulp outlet pipe upper end one side, is equipped with the second annular spraying pipe in the buffer tank body's top inside above the first annular spraying pipe, the first annular spraying pipe has the first inner wall nozzle assembly and the top nozzle assembly in the circumference, the second annular spraying pipe has the second inner wall nozzle assembly towards the buffer tank body circumference inner wall in the circumference. Advantages lie in: adopting three -dimensional layered cleaning, through the cooperation of lower first annular spraying pipe and upper second annular spraying pipe, covering the full height inner wall of buffer tank body from the bottom pulp outlet area to the top, solve the problem that traditional single spraying pipe is difficult to cover the upper part or top of tank body.

Description

Technical Field

[0001] This utility model belongs to the technical field of tank spraying equipment, specifically relating to a spraying device for a buffer tank in a paper machine flow system. Background Technology

[0002] In existing paper machine flow systems, the buffer tank spray system only has a single annular water pipe with cylindrical nozzles installed on it. This spraying method can only clean the inner wall of the annular pipe within a 20cm width above and below the corresponding horizontal plane. The inner wall above this width remains untreated. After the paper machine has been running for a period, the inner wall above the annular pipe, without spray water, easily accumulates pulp. Over time, this pulp forms clumps of putrefied pulp. These clumps fall into the headbox and, because they cannot combine with good pulp, eventually cause holes or wet spots on the wet paper exiting the headbox, leading to paper breaks. Furthermore, when the putrefied pulp accumulates severely, the paper machine must be temporarily stopped to dismantle the buffer tank and flush out the clumps, resulting in low machine efficiency and high production costs. Summary of the Invention

[0003] The purpose of this invention is to address the above-mentioned problems by providing a spray device for a buffer tank in a paper machine flow system.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a buffer tank spraying device for a paper machine flow system, comprising a buffer tank with an inner cavity, an inlet pipe connected to the inner cavity at the lower center of the buffer tank, an outlet pipe connected to the inner cavity at the lower outer side of the buffer tank, a first annular spraying pipe located on one side of the upper end of the outlet pipe inside the buffer tank, and a second annular spraying pipe located on the inner side of the top of the buffer tank above the first annular spraying pipe. The first annular spraying pipe has a first inner wall nozzle assembly facing the inner wall of the buffer tank and a top nozzle assembly facing the inner side of the top of the buffer tank. The second annular spraying pipe has a second inner wall nozzle assembly facing the inner wall of the buffer tank. By setting up two annular spraying pipes and clearly defining their positions and functional directions, comprehensive and thorough cleaning of the inner cavity of the buffer tank is achieved, laying the foundation for efficient cleaning and prevention of pulp deposition.

[0005] In the aforementioned spray device for a buffer tank in a paper machine flow system, the first and second annular spray pipes are arranged parallel to each other vertically, and both are coaxially aligned with the buffer tank body. This parallel and coaxial arrangement ensures a regular and symmetrical spray coverage area and uniform water flow distribution, avoiding problems of excessively strong or weak localized rinsing. Furthermore, the structure is stable and facilitates installation and fixation within the cylindrical tank.

[0006] In the aforementioned paper machine flow system buffer tank spray device, both the first and second annular spray pipes are circular, with the diameter of the first annular spray pipe being smaller than that of the second annular spray pipe. This top-larger, bottom-smaller annular design is a key optimization. The larger diameter of the upper second annular spray pipe allows for better coverage of the upper tank wall area that may be splashed due to pulp impact, while the smaller diameter of the lower first annular spray pipe avoids interference with lower components such as the pulp inlet pipe and focuses on rinsing its specific area. This structure makes full use of the tank space, achieving more efficient cleaning.

[0007] In the aforementioned paper machine flow system buffer tank spraying device, the upper end of the buffer tank is provided with a vertical water supply pipe extending axially to the inner side of the buffer tank, and both the first and second annular spray pipes are connected to the vertical water supply pipe. Using a single vertical water supply pipe to simultaneously supply water to both annular pipes simplifies the piping system, reduces tank openings and external connections, lowers manufacturing costs and potential leakage points, and makes the equipment structure more compact and easier to maintain.

[0008] In the above-mentioned paper machine flow system buffer tank spraying device, the first inner wall nozzle assembly includes a plurality of first inner wall nozzles disposed on the outer side of the first annular spray pipe, and the first inner wall nozzles are evenly distributed and all face the inner wall of the buffer tank.

[0009] In the above-mentioned paper machine flow system buffer tank spraying device, the second inner wall nozzle assembly includes a plurality of second inner wall nozzles disposed on the outer side of the second annular spray pipe. The second inner wall nozzles are evenly distributed and all face the inner wall of the buffer tank.

[0010] In the aforementioned paper machine flow system buffer tank spraying device, the first inner wall nozzle and the second inner wall nozzle are staggered vertically, and both the first and second inner wall nozzles are conical or fan-shaped nozzles. Their circumferential uniform distribution ensures that the inner wall of the buffer tank is evenly rinsed without any blind spots, effectively preventing the adhesion and accumulation of pulp on the tank wall. The staggered arrangement of the upper and lower nozzles is a crucial design feature; it allows the rinsing trajectories of the two rows of nozzles to complement each other, forming an interwoven cleaning network. This further eliminates rinsing dead zones that might be caused by direct water flow, improving the overall cleaning effect. Furthermore, the use of conical or fan-shaped nozzles allows for the generation of a wide-coverage water curtain or cone, resulting in higher cleaning efficiency and relatively more economical water consumption compared to direct flow, making it ideal for large-area surface rinsing.

[0011] In the aforementioned paper machine flow system buffer tank spraying device, the top nozzle assembly includes several top nozzles circumferentially arranged on the side of the first annular spray pipe near the second annular spray pipe. These top nozzles are evenly distributed and are all conical nozzles. The dedicated nozzles facing the top of the tank solve the problem of scaling and pulp nodules forming at the top due to pulp splashing and steam condensation. Simultaneously, the evenly distributed conical nozzles effectively flush the entire top surface, preventing top deposits from falling off and contaminating the pulp or clogging the outlet.

[0012] In the above-mentioned paper machine flow system buffer tank spraying device, a first connecting pipe is provided on one side of the lower end of the vertical water supply pipe, and the first annular spraying pipe is connected to the vertical water supply pipe through the first connecting pipe.

[0013] In the aforementioned paper machine flow system buffer tank spray device, a second connecting pipe is provided horizontally on one side of the middle of the vertical water supply pipe, and the second annular spray pipe is connected to the vertical water supply pipe through the second connecting pipe. Connecting the upper and lower spray pipes to the central vertical water supply pipe via the first and second connecting pipes, this radial connection method is simple, reliable, and easy to process and assemble. Furthermore, setting the connection points at different heights of the vertical pipe achieves independent water supply and support for the two annular pipes, resulting in clear logic and low pipeline resistance.

[0014] Compared with existing technologies, the advantages of this utility model are: 1. This device adopts three-dimensional layered cleaning. Through the cooperation of the lower first annular spray pipe and the upper second annular spray pipe, it covers the entire inner wall of the buffer tank from the bottom slurry outlet area to the top, solving the problem that traditional single spray pipes are difficult to cover the upper part or top of the tank.

[0015] 2. The first and second inner wall nozzles of the device are staggered one to one, and the uniformly distributed layout completely eliminates the spray blind spots on the inner wall of the tank, avoiding local pulp accumulation and residue. At the same time, the top nozzle assembly specifically rinses the inner side of the top of the tank to prevent the pulp from falling and contaminating the pulp flow, ensuring the stable quality of the pulp entering the next process.

[0016] 3. The diameter of the first annular spray pipe of the device is smaller than that of the second annular spray pipe, which is suitable for the localized and precise cleaning needs near the slurry outlet at the bottom of the tank, as well as the large-area coverage needs at the top, thereby improving cleaning efficiency while reducing water waste. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a structural cross-sectional view of the present invention.

[0019] Figure 3 This is a diagram of the internal structure of this utility model.

[0020] In the figure: buffer tank 1, slurry inlet pipe 11, slurry outlet pipe 12, vertical water supply pipe 13, first connecting pipe 14, second connecting pipe 15, first annular spray pipe 2, second annular spray pipe 3, first inner wall nozzle assembly 4, first inner wall nozzle 41, top nozzle assembly 5, top nozzle 51, second inner wall nozzle assembly 6, second inner wall nozzle 61. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] like Figure 1-3 As shown, a buffer tank spraying device for a paper machine flow system includes a buffer tank 1 with an inner cavity. A pulp inlet pipe 11, communicating with the inner cavity, is located at the center of the lower end of the buffer tank 1. A pulp outlet pipe 12, also communicating with the inner cavity, is located on the outer side of the lower end of the buffer tank 1. A first annular spray pipe 2 is located on one side of the upper end of the pulp outlet pipe 12 inside the buffer tank 1. A second annular spray pipe 3 is located above the first annular spray pipe 2, on the inner side of the top of the buffer tank 1. The first annular spray pipe 2 has a first inner wall nozzle assembly 4 facing the inner wall of the buffer tank 1 and a top nozzle assembly 5 facing the inner side of the top of the buffer tank 1. The second annular spray pipe 3 has a second inner wall nozzle assembly 6 facing the inner wall of the buffer tank 1. By setting up two annular spray pipes, and clearly defining their positions and functional directions, comprehensive and thorough cleaning of the inner cavity of the buffer tank 1 is achieved, laying the foundation for efficient cleaning and prevention of pulp deposition.

[0023] Combination Figure 2 and Figure 3 As shown, the first annular spray pipe 2 and the second annular spray pipe 3 are arranged parallel to each other vertically, and both the first annular spray pipe 2 and the second annular spray pipe 3 are coaxially arranged with the buffer tank 1. The vertical parallel and coaxial arrangement makes the spray coverage area regular and symmetrical, and the water flow distribution uniform, avoiding the problem of excessive or insufficient local flushing. At the same time, the structure is stable and easy to install and fix in the cylindrical tank.

[0024] In this design, both the first annular spray pipe 2 and the second annular spray pipe 3 are circular, with the diameter of the first annular spray pipe 2 being smaller than that of the second annular spray pipe 3. This top-larger, bottom-smaller circular design is a key optimization. The larger diameter of the upper second annular spray pipe 3 allows for better coverage of the upper tank wall area that may be splashed due to slurry impact, while the smaller diameter of the lower first annular spray pipe 2 avoids interference with lower components such as the slurry inlet pipe 11 and focuses on rinsing its specific area. This structure makes full use of the tank space, achieving more efficient cleaning.

[0025] Specifically, the upper end of the buffer tank 1 is provided with a vertical water supply pipe 13 extending axially into the inner side of the buffer tank 1, and both the first annular spray pipe 2 and the second annular spray pipe 3 are connected to the vertical water supply pipe 13. Using a single vertical water supply pipe 13 to supply water to both annular pipes simultaneously simplifies the piping system, reduces tank openings and external connections, lowers manufacturing costs and potential leakage points, and makes the equipment structure more compact and easier to maintain.

[0026] Furthermore, the first inner wall nozzle assembly 4 includes a plurality of first inner wall nozzles 41 disposed on the outer side of the first annular spray pipe 2, the first inner wall nozzles 41 being evenly distributed and all facing the inner wall of the buffer tank 1.

[0027] Furthermore, the second inner wall nozzle assembly 6 includes a plurality of second inner wall nozzles 61 disposed on the outer side of the second annular spray pipe 3, the second inner wall nozzles 61 being evenly distributed and all facing the inner wall of the buffer tank 1.

[0028] Meanwhile, the first inner wall nozzle 41 and the second inner wall nozzle 61 are staggered vertically, and both the first inner wall nozzle 41 and the second inner wall nozzle 61 are conical or fan-shaped nozzles. Their circumferential uniform distribution ensures that the inner wall of the buffer tank is evenly rinsed without any blind spots, effectively preventing the adhesion and accumulation of slurry on the tank wall. The staggered arrangement of the upper and lower nozzles is a crucial design feature; the staggered arrangement allows the rinsing trajectories of the two rows of nozzles to complement each other, forming an interwoven cleaning network. This further eliminates rinsing dead zones that may be caused by direct water flow, improving the overall cleaning effect. Furthermore, the use of conical or fan-shaped nozzles can produce a wide-coverage water curtain or water cone, resulting in higher cleaning efficiency and relatively more economical water consumption compared to direct flow, making it ideal for large-area surface rinsing.

[0029] Clearly, the top nozzle assembly 5 includes several top nozzles 51 circumferentially arranged on one side of the first annular spray pipe 2 near the second annular spray pipe 3. The top nozzles 51 are evenly distributed and are all conical nozzles. The nozzles specifically designed to face the top of the tank solve the problem of scaling and nodule formation at the top of the tank due to slurry splashing and steam condensation. At the same time, the evenly distributed conical nozzles can effectively flush the entire top surface, preventing top deposits from falling off and contaminating the slurry or clogging the outlet.

[0030] like Figure 3 As shown, a first connecting pipe 14 is provided on one side of the lower end of the vertical water supply pipe 13, and the first annular spray pipe 2 is connected to the vertical water supply pipe 13 through the first connecting pipe 14.

[0031] The vertical water supply pipe 13 has a horizontally arranged second connecting pipe 15 on one side of its middle section, and the second annular spray pipe 3 is connected to the vertical water supply pipe 13 through the second connecting pipe 15. The upper and lower spray pipes are connected to the central vertical water supply pipe 13 through the first connecting pipe 14 and the second connecting pipe 15. This radial connection method is simple, reliable, easy to process and assemble, and sets the connection points at different heights of the vertical pipe, realizing independent water supply and support for the two annular pipes. The logic is clear and the pipeline resistance is small.

[0032] The principle of this embodiment is as follows: When cleaning or prevention of slurry deposition is required, the system is activated, and clean water or white water is pumped in through the vertical water supply pipe 13 located at the top of the buffer tank 1. The water flows downward along the vertical water supply pipe 13 and is distributed to the second annular spray pipe 3 and the first annular spray pipe 2 through the second connecting pipe 15 and the first connecting pipe 14. Upper side wall cleaning: Multiple second inner wall nozzles 61 on the second inner wall nozzle assembly 6 spray water evenly. Since the nozzles are conical or fan-shaped, they do not spray water columns, but rather a water curtain covering a fan-shaped angle. This water curtain directly impacts and covers the upper circumferential inner wall of the buffer tank 1. Lower side wall cleaning and top cleaning: The first inner wall nozzle 41 on the first inner wall nozzle assembly 4 also sprays a fan-shaped water curtain, covering and impacting the lower circumferential inner wall of the buffer tank 1. The top nozzle 51 on the top nozzle assembly 5 sprays a fan-shaped water curtain upward, directly rinsing the top inner surface of the buffer tank 1.

[0033] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0034] Although this document frequently uses terms such as buffer tank 1, slurry inlet pipe 11, slurry outlet pipe 12, vertical water supply pipe 13, first connecting pipe 14, second connecting pipe 15, first annular spray pipe 2, second annular spray pipe 3, first inner wall nozzle assembly 4, first inner wall nozzle 41, top nozzle assembly 5, top nozzle 51, second inner wall nozzle assembly 6, and second inner wall nozzle 61, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A buffer tank spraying device for a paper machine flow system, comprising a buffer tank (1) with an inner cavity, wherein a pulp inlet pipe (11) communicating with the inner cavity is provided at the center of the lower end of the buffer tank (1), and a pulp outlet pipe (12) communicating with the inner cavity is provided on the outer side of the lower end of the buffer tank (1), characterized in that, The buffer tank (1) is provided with a first annular spray pipe (2) located on one side of the upper end of the slurry outlet pipe (12). Above the first annular spray pipe (2) is a second annular spray pipe (3) located on the inner side of the top of the buffer tank (1). The first annular spray pipe (2) has a first inner wall nozzle assembly (4) facing the inner wall of the buffer tank (1) and a top nozzle assembly (5) facing the inner side of the top of the buffer tank (1). The second annular spray pipe (3) has a second inner wall nozzle assembly (6) facing the inner wall of the buffer tank (1).

2. The spray device for the buffer tank of a paper machine flow system according to claim 1, characterized in that, The first annular spray pipe (2) and the second annular spray pipe (3) are arranged in parallel vertically, and both the first annular spray pipe (2) and the second annular spray pipe (3) are coaxially arranged with the buffer tank (1).

3. The spray device for the buffer tank of a paper machine flow system according to claim 1, characterized in that, The first annular spray pipe (2) and the second annular spray pipe (3) are both annular, and the diameter of the first annular spray pipe (2) is smaller than the diameter of the second annular spray pipe (3).

4. A spray device for a buffer tank in a paper machine flow system according to claim 1, 2, or 3, characterized in that, The buffer tank (1) is provided with a vertical water supply pipe (13) extending axially to the inside of the buffer tank (1) at its upper end, and the first annular spray pipe (2) and the second annular spray pipe (3) are both connected to the vertical water supply pipe (13).

5. The spray device for the buffer tank of a paper machine flow system according to claim 1, characterized in that, The first inner wall nozzle assembly (4) includes a plurality of first inner wall nozzles (41) disposed on the outer side of the first annular spray pipe (2). The first inner wall nozzles (41) are evenly distributed and all face the inner wall of the buffer tank (1).

6. The spray device for a buffer tank in a paper machine flow system according to claim 5, characterized in that, The second inner wall nozzle assembly (6) includes a plurality of second inner wall nozzles (61) disposed on the outer side of the second annular spray pipe (3). The second inner wall nozzles (61) are evenly distributed and all face the inner wall of the buffer tank (1).

7. A spray device for a buffer tank in a paper machine flow system according to claim 6, characterized in that, The first inner wall nozzle (41) and the second inner wall nozzle (61) are staggered one above the other, and both the first inner wall nozzle (41) and the second inner wall nozzle (61) are conical nozzles or fan-shaped nozzles.

8. The spray device for the buffer tank of a paper machine flow system according to claim 1, characterized in that, The top nozzle assembly (5) includes several top nozzles (51) arranged circumferentially on one side of the first annular spray pipe (2) near the second annular spray pipe (3). The top nozzles (51) are evenly distributed and are all conical nozzles.

9. A spray device for a buffer tank in a paper machine flow system according to claim 4, characterized in that, The lower end of the vertical water supply pipe (13) is provided with a first connecting pipe (14) arranged horizontally, and the first annular spray pipe (2) is connected to the vertical water supply pipe (13) through the first connecting pipe (14).

10. A spray device for a buffer tank in a paper machine flow system according to claim 9, characterized in that, The vertical water supply pipe (13) is provided with a horizontally arranged second connecting pipe (15) on one side of the middle section, and the second annular spray pipe (3) is connected to the vertical water supply pipe (13) through the second connecting pipe (15).

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