Pulp backflow control device for hydrapulper of paperboard machine

Abstract

The utility model discloses a pulp backflow control device for a hydrapulper of a paperboard machine, and relates to the technical field of pulping. A paperboard machine hydrapulper pulp backflow control device comprises a hydrapulper body and a water tank, the bottom of the hydrapulper body is fixedly connected with a pulp discharging elbow, the pulp discharging elbow is communicated with the interior of the hydrapulper body, and the pipeline cleaning structure is located on the water tank and communicated with the interior of the hydrapulper body. The pipeline cleaning structure comprises a water suction pump, a water supply pipe and an annular pipe, and through a circulating cleaning system formed by the water suction pump, the water supply pipe, the annular pipe, a cleaning transverse pipe and a cleaning vertical pipe, when cleaning is needed, the water suction pump is started, liquid flows in the pipeline at a high speed, and the inner wall of a backflow pipe is strongly scoured; impurities such as adhered stickers, filler particles and printing ink residues are removed in time, impurity accumulation is avoided through continuous circulating cleaning, the inner diameter of the pipeline is kept stable, slurry circulation resistance is reduced, and it is guaranteed that the pipeline is unobstructed in the long-term using process.

Description

Technical Field

[0001] This utility model relates to the field of pulping technology, and in particular to a pulp return control device for a hydraulcrete machine in a paperboard machine. Background Technology

[0002] In the production process of paperboard machines, the hydraulic pulper is one of the key pieces of equipment. It undertakes the important task of breaking down and loosening waste paper or other pulp raw materials and preparing pulp suitable for subsequent processes. During the operation of the hydraulic pulper, the pulp goes through a series of complex flow processes, including breaking down, mixing, and conveying. Finally, some of the pulp will be returned to the pulper or other processing units through the return pipe to achieve the recycling of pulp and the stable control of process parameters.

[0003] In actual production, the raw materials used in paperboard production are complex, such as waste cardboard boxes and newspapers. After being processed by a hydrapulper, the pulp composition is complex, containing not only fibers but also adhesives, filler particles, ink residues, and other impurities. These impurities easily adhere to and deposit on the inner wall of the return pipe during the pulp recirculation process. Over time, the impurities accumulate, causing the inner diameter of the pipe to decrease and the pulp flow resistance to increase significantly. This not only affects the normal operation of the hydrapulper but also reduces the quality of the pulp. Therefore, we propose a pulp recirculation control device for a paperboard machine hydrapulper. Utility Model Content

[0004] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a pulp return control device for a hydraulcrete machine for paperboard production. This device can solve the problem that in the actual production process, the raw materials used in paperboard production are complex, such as waste cardboard boxes and newspapers. After being processed by the hydraulcrete machine, the pulp composition is complex. In addition to fibers, it also contains impurities such as adhesives, filler particles, and ink residues. During the pulp return process, these impurities are very easy to adhere to and deposit on the inner wall of the return pipe. Over time, the impurities accumulate, causing the inner diameter of the pipe to become smaller and the pulp flow resistance to increase significantly. This not only affects the normal operation of the hydraulcrete machine, but also reduces the quality of the pulp.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pulp return control device for a hydraulcrete machine in a paperboard machine, comprising:

[0006] The hydraulic pulper body and water tank are provided. A discharge bend is fixedly connected to the bottom of the hydraulic pulper body, and the discharge bend is connected to the interior of the hydraulic pulper body.

[0007] Pipe cleaning structure, located on the water tank;

[0008] The pipeline cleaning structure includes a water pump, a water supply pipe, and a ring pipe. The water pump is fixedly installed on the top of the water tank. The pump's suction end is connected to the inside of the water tank, and the pump's discharge end is fixedly connected to the water supply pipe. The end of the water supply pipe away from the water pump is fixedly connected to the ring pipe, and two rotary valves are fixedly installed on the ring pipe. The end of the slurry discharge bend away from the hydraulic pulper body is fixedly installed with a slurry pump. The pump's suction end is connected to the inside of the slurry discharge bend, and the pump's discharge end is fixedly connected to the slurry discharge main pipe.

[0009] Preferably, an electromagnetic control valve is fixedly installed on the outer surface of the slurry discharge main pipe. A return pipe is fixedly connected to the end of the electromagnetic control valve away from the slurry discharge main pipe. The end of the return pipe away from the electromagnetic control valve is connected to the interior of the hydraulic pulper body. A cleaning horizontal pipe and a cleaning vertical pipe are fixedly connected to the outer surface of the return pipe. Both the cleaning horizontal pipe and the cleaning vertical pipe are connected to the interior of the return pipe. The end of the annular pipe away from the water supply pipe is fixedly connected to the cleaning horizontal pipe and the cleaning vertical pipe, respectively.

[0010] Preferably, a slurry concentration sensor is fixedly installed on the outer surface of the slurry discharge main pipe, and the detection end of the slurry concentration sensor is located inside the slurry discharge main pipe.

[0011] Preferably, a control valve is fixedly installed on the outer surface of the slurry discharge bend.

[0012] Preferably, a water injection pipe is fixedly connected to the top of the water tank, and the water injection pipe communicates with the interior of the water tank.

[0013] Preferably, the return pipe has an "L" shaped structure.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The pulp return control device of this paperboard machine hydraulic pulper consists of a circulation cleaning system composed of a water pump, water supply pipe, ring pipe, cleaning horizontal pipe and cleaning vertical pipe. When cleaning is required, the water pump is started to make the liquid flow at high speed in the pipeline, which powerfully flushes the inner wall of the return pipe, and removes the attached adhesive, filler particles, ink residue and other impurities in a timely manner. Continuous circulation cleaning avoids the accumulation of impurities, maintains the stability of the inner diameter of the pipeline, reduces the resistance to pulp flow, and ensures that the pipeline is unobstructed during long-term use. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the slurry discharge bend structure of this utility model;

[0019] Figure 3 This is a schematic cross-sectional view of the hydraulic pulper body of this utility model;

[0020] Figure 4 This is a schematic diagram of the annular tube structure of this utility model.

[0021] Reference numerals in the attached diagram: 1. Hydraulic pulper body; 2. Water tank; 3. Water pump; 4. Water supply pipe; 5. Return pipe; 6. Electromagnetic control valve; 7. Slurry concentration sensor; 8. Slurry pump; 9. Slurry discharge bend; 10. Control valve; 11. Slurry discharge main pipe; 12. Cleaning horizontal pipe; 13. Cleaning vertical pipe; 14. Circular pipe; 15. Rotary valve; 16. Water injection pipe. Detailed Implementation

[0022] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0023] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0025] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0026] Please see Figure 1-4 This utility model provides a technical solution: a pulp return control device for a hydraulcreting machine in a paperboard machine, comprising:

[0027] The hydraulic pulper body 1 and the water tank 2 are provided. The bottom of the hydraulic pulper body 1 is fixedly connected to the discharge bend 9, which is connected to the interior of the hydraulic pulper body 1.

[0028] Pipe cleaning structure, located on water tank 2;

[0029] The pipeline cleaning structure includes a water pump 3, a water supply pipe 4, and a ring pipe 14. The water pump 3 is fixedly installed on the top of the water tank 2. The pumping end of the water pump 3 is connected to the inside of the water tank 2. The pumping end of the water pump 3 is fixedly connected to the water supply pipe 4. The end of the water supply pipe 4 away from the water pump 3 is fixedly connected to the ring pipe 14. Two rotary valves 15 are fixedly installed on the ring pipe 14. The end of the slurry discharge bend 9 away from the hydraulic pulper body 1 is fixedly installed with a slurry pump 8. The pumping end of the slurry pump 8 is connected to the inside of the slurry discharge bend 9. The slurry discharge end of the slurry pump 8 is fixedly connected to the slurry discharge main pipe 11.

[0030] An electromagnetic control valve 6 is fixedly installed on the outer surface of the slurry discharge main pipe 11. A return pipe 5 is fixedly connected to the end of the electromagnetic control valve 6 away from the slurry discharge main pipe 11. The return pipe 5 has an "L" shaped structure. The end of the return pipe 5 away from the electromagnetic control valve 6 is connected to the interior of the hydraulic pulper body 1. A cleaning horizontal pipe 12 and a cleaning vertical pipe 13 are fixedly connected to the outer surface of the return pipe 5. Both the cleaning horizontal pipe 12 and the cleaning vertical pipe 13 are connected to the interior of the return pipe 5. The end of the annular pipe 14 away from the water supply pipe 4 is fixedly connected to the cleaning horizontal pipe 12 and the cleaning vertical pipe 13 respectively.

[0031] A slurry concentration sensor 7 is fixedly installed on the outer surface of the slurry discharge main pipe 11. The detection end of the slurry concentration sensor 7 is located inside the slurry discharge main pipe 11. A control valve 10 is fixedly installed on the outer surface of the slurry discharge bend 9. A water injection pipe 16 is fixedly connected to the top of the water tank 2. The water injection pipe 16 is connected to the inside of the water tank 2.

[0032] Furthermore, when using this device, the slurry in the hydraulic pulper body 1 is pumped to the slurry discharge main pipe 11 through the slurry discharge bend 9 under the action of the slurry pump 8. The slurry concentration sensor 7 on the slurry discharge main pipe 11 detects the slurry concentration in real time and feeds back the data. If the detected slurry concentration meets the production standard, the electromagnetic control valve 6 is closed and the slurry is discharged directly through the slurry discharge main pipe 11; if the concentration does not meet the standard, the next step of the recirculation operation is performed.

[0033] When the slurry concentration sensor 7 detects that the slurry concentration is not up to standard, the electromagnetic control valve 6 opens and the slurry discharge main pipe 11 closes. The slurry flows back to the hydraulic pulper body 1 through the return pipe 5 for reprocessing. When the return pipe 5 needs to be cleaned, the slurry discharge main pipe 11 closes, the electromagnetic control valve 6 opens, and the water pump 3 starts. The water pump 3 draws the liquid from the water tank 2 and delivers it to the annular pipe 14 through the water supply pipe 4. The annular pipe 14 guides the liquid into the cleaning horizontal pipe 12 and the cleaning vertical pipe 13 respectively, and sends it into the hydraulic pulper body 1 through the return pipe 5. The liquid flows and flushes in the return pipe 5, the cleaning horizontal pipe 12 and the cleaning vertical pipe 13 to clean the pipes and prevent slurry residue from clogging the pipes.

[0034] The control valve 10 on the discharge bend 9 can control the discharge flow rate of the slurry in the hydraulic pulper body 1. By adjusting the working state of the control valve 10 and the slurry pump 8, the amount of slurry entering the discharge main pipe 11 can be controlled. In conjunction with the electromagnetic control valve 6 and the slurry concentration sensor 7, the precise control of the slurry concentration and discharge volume can be achieved.

[0035] The circulating cleaning system, consisting of a water pump 3, a water supply pipe 4, a ring pipe 14, a horizontal cleaning pipe 12, and a vertical cleaning pipe 13, allows the water pump 3 to be started when cleaning is needed. This causes the liquid to flow at high speed within the pipes, forcefully flushing the inner wall of the return pipe 5 and promptly removing adhering adhesives, filler particles, ink residues, and other impurities. Continuous circulating cleaning prevents the accumulation of impurities, maintains a stable inner diameter of the pipes, reduces the resistance to slurry flow, and ensures unobstructed pipe flow during long-term use.

[0036] Structural Description: Hydraulic pulper body 1: Used for pulping raw materials for paperboard production, it is the core equipment for pulp generation; the bottom discharge bend 9 is used to discharge the pulp after internal pulping;

[0037] Water tank 2: Stores liquid for pipe cleaning; the top water inlet pipe 16 can be replenished to provide water for pipe cleaning.

[0038] Water pump 3: Fixed to the top of water tank 2, it draws out the liquid in water tank 2 to provide power for pipe cleaning and drive the liquid to flow in the cleaning pipe;

[0039] Water supply pipe 4: connects the discharge end of water pump 3 to the annular pipe 14, and is used to transport the liquid pumped out by water pump 3;

[0040] Return pipe 5: "L" shaped structure, used to return the slurry with insufficient concentration in the discharge main pipe 11 to the hydraulic pulper body 1 for reprocessing, and at the same time serves as a flow channel for pipeline cleaning liquid, with the outer surface connected to the cleaning horizontal pipe 12 and the cleaning vertical pipe 13;

[0041] Electromagnetic control valve 6: Installed on the outer surface of the slurry discharge main pipe 11, it controls whether the slurry is backflowed based on the data fed back by the slurry concentration sensor 7. When the slurry concentration is not up to standard, it opens to allow the slurry to return through the return pipe 5.

[0042] Slurry concentration sensor 7: Installed on the outer surface of the slurry discharge main pipe 11, with the detection end located inside the slurry discharge main pipe 11, it monitors the slurry concentration in real time and feeds back the data to provide a basis for the action of the electromagnetic control valve 6. The model can be found in the SEN8100 series online slurry concentration sensor.

[0043] Slurry pump 8: Installed at the end of the slurry discharge bend 9 away from the hydraulic pulper body 1, it pumps the slurry in the hydraulic pulper body 1 to the slurry discharge main pipe 11;

[0044] Slurry discharge bend 9: Fixed at the bottom of the hydraulic pulper body 1, connecting the inside of the hydraulic pulper body 1 with the slurry pump 8, used to transport slurry; the control valve 10 on the outer surface can control the slurry discharge flow rate.

[0045] Control valve 10: Installed on the outer surface of the slurry discharge bend 9, it controls the discharge flow rate of slurry inside the hydraulic pulper body 1 by adjustment;

[0046] Slurry discharge main pipe 11: used to receive slurry delivered by slurry pump 8, and to control the discharge or return of slurry by electromagnetic control valve 6; slurry concentration sensor 7 and electromagnetic control valve 6 are installed on the outer surface;

[0047] Cleaning horizontal pipe 12: It is connected to the inside of the return pipe 5, and the cleaning liquid transported by the annular pipe 14 is introduced into the return pipe 5 to perform horizontal flushing and cleaning of the return pipe 5.

[0048] Cleaning vertical pipe 13: It is connected to the inside of the return pipe 5, and the cleaning liquid transported by the ring pipe 14 is introduced into the return pipe 5 to vertically flush and clean the return pipe 5.

[0049] Ring pipe 14: Connects to water supply pipe 4, and distributes the liquid transported by water supply pipe 4 to cleaning horizontal pipe 12 and cleaning vertical pipe 13, providing liquid diversion for pipe cleaning;

[0050] Rotary valve 15: Installed on the annular pipe 14, it controls the flow rate or on / off state of the cleaning liquid in the annular pipe 14 by rotating it.

[0051] Water inlet pipe 16: Fixed to the top of water tank 2 and connected to the inside of water tank 2, used to replenish cleaning liquid into water tank 2.

[0052] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A pulp return control device for a hydraulcrete machine in a paperboard machine, characterized in that, include: The hydraulic pulper body (1) and water tank (2) are connected to the bottom of the hydraulic pulper body (1), and the slurry discharge bend (9) is connected to the interior of the hydraulic pulper body (1). Pipe cleaning structure, the pipe cleaning structure is located on the water tank (2); The pipeline cleaning structure includes a water pump (3), a water supply pipe (4) and a ring pipe (14). The water pump (3) is fixedly installed on the top of the water tank (2). The pumping end of the water pump (3) is connected to the inside of the water tank (2), and the discharge end of the water pump (3) is fixedly connected to the water supply pipe (4). Among them, the end of the water supply pipe (4) away from the water pump (3) is fixedly connected to the ring pipe (14), and two rotary valves (15) are fixedly installed on the ring pipe (14). The end of the slurry discharge bend (9) away from the hydraulic pulper body (1) is fixedly installed with a slurry pump (8). The pumping end of the slurry pump (8) is connected to the inside of the slurry discharge bend (9), and the slurry discharge end of the slurry pump (8) is fixedly connected to the slurry discharge main pipe (11).

2. The pulp return control device for a hydraulcrete machine of a paperboard machine according to claim 1, characterized in that: An electromagnetic control valve (6) is fixedly installed on the outer surface of the slurry discharge main pipe (11). A return pipe (5) is fixedly connected to one end of the electromagnetic control valve (6) away from the slurry discharge main pipe (11). The other end of the return pipe (5) away from the electromagnetic control valve (6) is connected to the interior of the hydraulic pulper body (1). Among them, a cleaning horizontal pipe (12) and a cleaning vertical pipe (13) are fixedly connected to the outer surface of the return pipe (5). The cleaning horizontal pipe (12) and the cleaning vertical pipe (13) are both connected to the interior of the return pipe (5). The end of the ring pipe (14) away from the water supply pipe (4) is fixedly connected to the cleaning horizontal pipe (12) and the cleaning vertical pipe (13) respectively.

3. The pulp return control device for a hydraulcrete machine of a paperboard machine according to claim 1, characterized in that: A slurry concentration sensor (7) is fixedly installed on the outer surface of the slurry discharge main pipe (11), and the detection end of the slurry concentration sensor (7) is located inside the slurry discharge main pipe (11).

4. The pulp return control device for a hydraulcrete machine of a paperboard machine according to claim 1, characterized in that: A control valve (10) is fixedly installed on the outer surface of the slurry discharge bend (9).

5. The pulp return control device for a hydraulcrete machine of a paperboard machine according to claim 1, characterized in that: A water injection pipe (16) is fixedly connected to the top of the water tank (2), and the water injection pipe (16) communicates with the interior of the water tank (2).

6. The pulp return control device for a hydraulcrete machine of a paperboard machine according to claim 2, characterized in that: The return pipe (5) has an "L" shaped structure.

Images