A pulp tower cleaning system

Abstract

The utility model discloses a pulp tower cleaning system, which relates to the field of papermaking technology, in order to solve the problem that the pulp tower cleaning structure is complex, the cost is high, and it is only applicable to the cleaning of large pulp towers. The pulp tower cleaning system includes a pulp tower body, a visual perception device, a liquid storage device, a cleaning nozzle assembly, a cleaning liquid pipeline and a controller. The pulp tower body has a pulp storage cavity, the cleaning nozzle assembly is arranged on the inner wall of the pulp storage cavity, the liquid outlet of the liquid storage device is connected to the liquid inlet of the pulp tower body through the cleaning liquid pipeline, and the liquid inlet of the pulp tower body is connected to the liquid inlet of the cleaning nozzle assembly; the pulp tower cleaning system also includes a controllable valve, the controllable valve is arranged on the cleaning liquid pipeline, the visual perception device is arranged on the inner wall of the pulp storage cavity, and the visual perception device and the controllable valve are both electrically connected to the controller. The pulp tower cleaning system and device are used for automatically cleaning the pulp tower.

Description

Technical Field

[0001] The utility model relates to the technical field of papermaking, in particular to a pulp tower cleaning system. Background Art

[0002] Pulp is an important basic raw material for papermaking. With the advancement of papermaking technology, the pulp needs to be stored in a pulp tower to adapt to the faster papermaking speed of the paper machine. At the same time, in order to meet the different performance requirements of different types of paper, various chemical additives need to be added to the pulp during production, so a stock preparation tower is needed to temporarily store the pulp.

[0003] However, the inside of the pulp tower will become dirty after long-term use, and it is easy to generate dirt and blockage. It is very time-consuming and laborious to enter the pulp tower manually for cleaning, and there are great safety hazards. At present, a rotatable cleaning structure is often designed in the pulp tower, which has a complex structure, high cost and is only suitable for cleaning large pulp towers. Utility Model Content

[0004] The utility model aims to provide a pulp tower cleaning system, which can improve the pulp tower cleaning efficiency at a relatively low cost, reduce the probability of hidden dangers of work-related injuries caused by manual cleaning, and is suitable for cleaning operations of large pulp towers and small pulp towers.

[0005] In order to achieve the above object, the utility model provides a pulp tower cleaning system, comprising:

[0006] A slurry tower body, a visual perception device, a liquid storage device, a cleaning nozzle assembly, a cleaning liquid pipeline and a controller, wherein the slurry tower body has a slurry storage cavity, the cleaning nozzle assembly is arranged on the inner wall of the slurry storage cavity, the liquid outlet of the liquid storage device is connected to the liquid inlet of the slurry tower body through the cleaning liquid pipeline; the liquid inlet of each slurry tower body is connected to the liquid inlet of the cleaning nozzle assembly; the slurry tower cleaning system also includes a controllable valve, which is arranged on the cleaning liquid pipeline, and the visual perception device is arranged on the inner wall of the slurry storage cavity, and the visual perception device and the controllable valve are both electrically connected to the controller.

[0007] Compared with the prior art, the slurry tower cleaning system provided by the utility model includes a slurry tower body, a visual perception device, a liquid storage device, a cleaning nozzle assembly, a cleaning liquid pipeline and a controller, wherein the slurry tower body has a slurry storage cavity, the cleaning nozzle assembly is arranged in the slurry storage cavity, the liquid outlet of the liquid storage device is connected to the liquid inlet of the slurry tower body through the cleaning liquid pipeline, and the liquid inlet of the slurry tower body is connected to the liquid inlet of the cleaning nozzle assembly, therefore, the cleaning liquid stored in the liquid storage device can be passed into the liquid inlet of the cleaning liquid pipeline, so that the cleaning liquid first enters the liquid inlet of the corresponding slurry tower body along the cleaning liquid pipeline, and then passes from the liquid inlet of the slurry tower body into the liquid inlet of the cleaning nozzle assembly to perform the spray cleaning operation of the slurry tower. The slurry tower cleaning system provided by the utility model also includes a controllable valve, which is arranged on the cleaning liquid pipeline, and the controllable valves are all connected to the controller, therefore, the controller can not only clean the slurry storage cavity of the slurry tower body by controlling the opening and closing of the controllable valve, but also help to improve the cleaning efficiency of the slurry tower. In addition, the visual perception device provided by the utility model is arranged on the inner wall of the pulp storage chamber, and the visual perception device is connected to the controller. After the cleaning operation is completed, the visual perception device arranged on the pulp tower body can detect the cleanliness of the pulp storage chamber. Therefore, when the visual perception device detects that there is a part of the pulp storage chamber that has not been thoroughly cleaned, the controller connected to the visual perception device will open the valve of the cleaning liquid pipeline of the part to re-perform the cleaning operation until the part is completely cleaned, thereby reducing the probability of the subsequent paper making quality being affected by pulp residue.

[0008] Compared with the prior art in which the purpose of cleaning the pulp tower is achieved by modifying the pulp tower structure, the pulp tower cleaning system provided by the utility model has a simple structure and low cost. The pulp tower cleaning operation can be completed efficiently and with high quality through the cooperation of various devices in the system, thereby reducing the probability of hidden dangers of work-related injuries caused by manual cleaning, and is suitable for cleaning operations of large and small pulp towers. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0010] Figure 1 A first schematic diagram of a pulp tower cleaning system provided in an embodiment of the utility model is shown;

[0011] Figure 2 A second schematic diagram of the pulp tower cleaning system provided in an embodiment of the utility model is shown. DETAILED DESCRIPTION

[0012] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0013] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0014] Pulp is an important basic raw material for papermaking. With the advancement of papermaking technology, pulp needs to be stored in a pulp tower to adapt to the faster papermaking speed of the paper machine. At the same time, in order to meet the different performance requirements of different types of paper, various chemical additives need to be added to the pulp during production, so a stock preparation tower is needed to temporarily store the pulp. The inside of the pulp tower will become dirty after long-term use, and it is easy to produce dirt and blockage. Manual entry into the pulp tower for cleaning is very time-consuming and labor-intensive, and there are major safety hazards.

[0015] At present, a rotatable cleaning structure is often designed in the pulp tower, which has a complex structure, high cost and is only applicable to the cleaning of large pulp towers.

[0016] In view of the above problems, the utility model provides a pulp tower cleaning system, which can improve the pulp tower cleaning efficiency at a relatively low cost, reduce the probability of hidden dangers of work-related injuries caused by manual cleaning, and is suitable for cleaning operations of large pulp towers and small pulp towers. Figure 1 A schematic diagram of a pulp tower cleaning system provided in an embodiment of the utility model is shown. Figure 2 A second schematic diagram of the pulp tower cleaning system provided in an embodiment of the utility model is shown. Figure 1 and Figure 2 As shown, the slurry tower cleaning system 100 includes: a slurry tower body 101, a visual perception device 102, a liquid storage device 103, a cleaning nozzle assembly 104, a cleaning liquid pipeline 105 and a controller 106, wherein the slurry tower body 101 has a slurry storage cavity, the cleaning nozzle assembly 104 is arranged in the slurry storage cavity, the liquid outlet of the liquid storage device 103 is connected to the liquid inlet of the slurry tower body 101 through the cleaning liquid pipeline 105, and the liquid inlet of each slurry tower body 101 is connected to the liquid inlet of the corresponding cleaning nozzle assembly 104;

[0017] The slurry tower cleaning system 100 in the embodiment of the utility model also includes a controllable valve 107, which is arranged on the corresponding cleaning liquid pipeline 105, and the visual perception device 102 is arranged on the inner wall of the slurry storage chamber. The visual perception device 102 and the controllable valve 107 are both connected to the controller 106.

[0018] In practical applications, the slurry tower body provided by the utility model has a slurry storage cavity, and a plurality of cleaning nozzle assemblies are arranged in the slurry storage cavity. The liquid outlet of the liquid storage device is connected to the liquid inlet of the corresponding slurry tower body through each cleaning liquid pipeline, and the liquid inlet of each slurry tower body is connected to the liquid inlet of the cleaning nozzle assembly. Therefore, the cleaning liquid stored in the liquid storage device can be passed into the liquid inlet of each cleaning liquid pipeline, so that the cleaning liquid first enters the liquid inlet of the corresponding slurry tower body along the cleaning liquid pipeline, and then passes from the liquid inlet of the slurry tower body into the liquid inlet of the cleaning nozzle assembly to perform the spray cleaning operation of the slurry tower. The slurry tower cleaning system provided by the utility model also includes a controllable valve, which is arranged on the cleaning liquid pipeline, and the controllable valves are all connected to the controller. Therefore, the controller can not only clean the slurry storage cavity of the slurry tower body by controlling the opening and closing of the controllable valve, but also adjust the pressure of the cleaning liquid by controlling the opening of the controllable valve, thereby reducing the probability of obvious differences in the cleaning effect of the corresponding cleaning parts due to the large difference in the cleaning liquid pressure in each cleaning liquid pipeline, which is conducive to improving the cleaning efficiency of the slurry tower. In addition, the visual perception device provided by the utility model is arranged on the pulp tower body, and the visual perception device is connected to the controller. After the cleaning operation is completed, the visual perception device arranged on the pulp tower body can detect the cleanliness of the pulp storage cavity. Therefore, when the visual perception device detects that there is a part of the pulp storage cavity that has not been thoroughly cleaned, the controller connected to the visual perception device will open the valve of the cleaning liquid pipeline corresponding to the part to re-perform the cleaning operation until the part is completely cleaned, thereby reducing the probability of the subsequent paper making quality being affected by pulp residue.

[0019] Compared with the prior art in which the purpose of cleaning the pulp tower is achieved by modifying the pulp tower structure, the pulp tower cleaning system provided by the utility model has a simple structure and low cost. The pulp tower cleaning operation can be completed efficiently and with high quality through the cooperation of various devices in the system, thereby reducing the probability of hidden dangers of work-related injuries caused by manual cleaning, and is suitable for cleaning operations of large and small pulp towers.

[0020] It should be noted that the various valve controls and detections involved in the controller of the exemplary embodiment of the present disclosure are all existing technologies and do not involve modifications to the controller software. Therefore, the controller functions of the exemplary embodiment of the present disclosure can be implemented by referring to the related functions of the existing technology.

[0021] In an optional manner, the cleaning nozzle assembly provided by the utility model includes a plurality of nozzles, the liquid outlet of each cleaning liquid pipeline is connected to each nozzle, and the plurality of nozzles are distributed along the circumferential direction of the inner wall of the slurry storage chamber. Therefore, when the cleaning liquid introduced into the liquid inlet of the nozzle body is sprayed out from each nozzle, each position of the inner wall of the slurry storage chamber can be cleaned by the cleaning liquid, thereby improving the slurry tower cleaning efficiency at a lower cost. The caliber of each nozzle is 1 cm to 10 cm, and the spacing between two adjacent nozzles is 1 to 3 times the caliber of the nozzle. The angle between the spray direction of each nozzle and the inner wall of the slurry storage chamber is greater than 0° and less than 180°, which is conducive to increasing the spray area of ​​the cleaning nozzle assembly, so that the sediment adhering to the inner wall of the slurry storage chamber can be fully contacted with the cleaning liquid so that the cleaning liquid can fully dissolve it, and at the same time shortens the cleaning time of the slurry tower, thereby further improving the cleaning efficiency of the slurry tower.

[0022] Exemplarily, the multiple nozzles provided by the utility model include multiple groups of nozzles, and each group of nozzles includes multiple nozzles distributed along the circumferential direction of the slurry storage chamber. It is understandable that the slurry stored in the slurry tower body will produce sediment over time. Therefore, relatively speaking, there are more sediments in the parts closer to the bottom of the slurry storage chamber, and there are fewer sediments in the parts closer to the top of the slurry storage chamber, that is, there are more sediments in the parts along the direction of increasing depth of the slurry storage chamber. Based on this, the multiple groups of nozzles provided by the utility model are arranged on the inner wall of the slurry storage chamber along the direction of increasing depth of the slurry storage chamber, and the distribution density of the multiple groups of nozzles increases along the direction of increasing depth of the slurry storage chamber, so as to flush the sediments in the slurry storage chamber. The utility model can reduce costs while ensuring the cleaning effect of the slurry tower by reasonably arranging the distribution direction of the cleaning nozzle assembly.

[0023] In an alternative approach, Figure 1 and Figure 2 As shown, the pulp tower cleaning system provided by the utility model further includes a waste liquid recycling device 108, the inlet of the waste liquid recycling device 108 is connected to the waste liquid outlet provided at the bottom of the pulp tower body 101, and the outlet of the waste liquid recycling device 108 is connected to the liquid inlet of the liquid storage device 103. The pulp tower cleaning system provided by the utility model further includes a discharge valve 109, which is provided at the waste liquid outlet and is electrically connected to the controller. When the pulp tower cleaning is completed, the controller can control the discharge valve 109 to be in a closed state, and when the pulp tower cleaning starts, the controller can control the discharge valve 109 to be in a conducting state.

[0024] In practical applications, in order to improve the utilization rate of the cleaning liquid and reduce costs, the utility model uses a waste liquid recycling device to process and reuse the waste liquid, and the waste liquid recycling device includes a filter screen, an ion exchange device and a cleaning liquid preparation container distributed along the direction of the waste liquid outlet away from the slurry tower body, wherein the filter screen is arranged at the inlet of the ion exchange device, the outlet of the ion exchange device is connected to the inlet of the cleaning liquid preparation container, and the outlet of the cleaning liquid preparation container is connected to the liquid inlet of the liquid storage device. When the waste liquid enters the filter screen along the waste liquid outlet of the slurry tower body to filter out the slurry sediment contained in the waste liquid, then the filtrate from which the slurry sediment is filtered out is passed into the inlet of the ion exchange device, at this time, the waste liquid undergoes a replacement reaction with the hydrogen ions and hydroxide ions on the ion exchange device, so that the calcium ions, magnesium ions, carbonate ions, nitrate ions, sulfate ions and the like in the waste liquid are adsorbed by the resin and replace water. Finally, the replaced water is introduced into the inlet of the cleaning liquid preparation container to prepare it into a cleaning liquid of suitable concentration, and finally, the prepared cleaning liquid flows along the outlet of the cleaning liquid preparation container into the liquid inlet of the liquid storage device for standby use. It should be understood that the outlet of the cleaning liquid preparation container here is actually the outlet of the waste liquid recycling device.

[0025] In an optional manner, the pulp tower cleaning system 100 provided by the present invention further includes a cleaning timer arranged on the pulp tower body 101, and the cleaning timer is connected to the controller.

[0026] In practical applications, the area of ​​pulp dirt contained in the pulp storage chamber of the pulp tower body is different, and the cleaning time of each part in the pulp storage chamber should also be different to improve the cleaning efficiency of the pulp tower. Therefore, before the cleaning operation begins, the visual perception device provided on the pulp tower body can be used to detect the degree of dirt in the pulp storage chamber, and the cleaning time can be set by the cleaning timer in the controller according to the detection result of the visual perception device. When the cleaning time is over, the time of the cleaning timer is reset to zero, and the controller connected thereto controls the controllable valve of the corresponding cleaning liquid pipeline to be closed. After the cleaning operation is completed, the visual perception device provided on the pulp tower body can detect the cleanliness of the pulp storage chamber. Therefore, when the visual perception device detects that there is a part of the pulp storage chamber that has not been thoroughly cleaned, the controller connected to the visual perception device will open the valve of the cleaning liquid pipeline corresponding to the part to re-perform the cleaning operation until the part is completely cleaned, thereby reducing the probability of the subsequent papermaking quality being affected by pulp residue.

[0027] In an alternative approach, Figure 1 and Figure 2As shown, the slurry tower cleaning system 100 provided by the utility model further includes a temperature sensor 110, the probe of the temperature sensor 110 is arranged in the slurry storage chamber, and the temperature sensor 110 is connected to the controller 106. When the probe of the temperature sensor 110 detects that the temperature of the slurry storage chamber is greater than a preset range, the controller 106 connected thereto will close the controllable valve 107 to end the cleaning operation.

[0028] In an alternative approach, Figure 1 and Figure 2 As shown, the pulp tower cleaning system 100 provided by the utility model further includes a voice alarm device 111 , which is disposed on the pulp tower body 101 and is connected to the controller 106 .

[0029] For example, when the temperature of the slurry storage chamber detected by the temperature sensor 110 is greater than the preset range, after the controller obtains the signal, the controller controls the alarm device to remind the staff, and controls the controllable valves 107 corresponding to the plurality of cleaning liquid pipelines 105 to be closed to end the cleaning operation. If the controllable valve 107 fails, the controller controls the alarm device to remind the staff so that the staff can repair it in a targeted manner.

[0030] In an optional manner, the pulp tower cleaning system provided by the utility model further includes a drive motor, which is arranged on the pulp tower body and connected to the controller. Therefore, the controller can adjust the speed of the drive motor according to actual conditions to meet daily use requirements. In addition, the pulp tower cleaning system provided by the utility model further includes a motor protection device, which is connected to the controller.

[0031] In practical applications, the motor protection device can be used as a thermal relay. When the current passes through the motor protection device, heat is generated, causing the bimetallic strips with different expansion coefficients to deform, thereby controlling the corresponding circuit to disconnect and protecting the motor from overload. At this time, the controller will control the voice alarm device to remind the staff so that the staff can perform targeted maintenance. It should be understood that the utility model can set the working parameters of the motor protection device according to actual conditions. When the current parameters of the motor exceed the working parameters of the motor protection device, the motor protection device can disconnect the circuit, which is conducive to ensuring the normal operation of the drive motor and extending the service life of the drive motor.

[0032] In an optional manner, the pulp tower cleaning system provided by the utility model further includes a flow meter 112 and a pressure transmitter 113, which are both arranged on the cleaning liquid pipeline and are respectively connected to the controller. When the pressure transmitter detects that the pressure of the cleaning liquid pipeline exceeds the safe range, the controller will control the opening of the controllable valve of the cleaning liquid pipeline to adjust the pressure of the cleaning liquid, thereby reducing the probability of significant differences in the cleaning effects of the corresponding cleaning parts due to large differences in the cleaning liquid pressures in each cleaning liquid pipeline, which is beneficial to improving the cleaning efficiency of the pulp tower. When the flow meter detects that the flow rate of the cleaning liquid in the cleaning liquid pipeline exceeds the safe range, the controller will control the opening of the controllable valve of the cleaning liquid pipeline to adjust the flow rate of the cleaning liquid, which is beneficial to extending the service life of the pulp tower cleaning system.

[0033] In an alternative approach, Figure 1 and Figure 2 As shown, the pulp tower cleaning system 100 provided by the utility model also includes a visual command input device 114, which is connected to the controller 106. Therefore, the controller 106 can not only control the visual command input device 114 to display alarm information, temperature and pressure values ​​during the operation of the pulp tower cleaning system 100, the state of the motor, the operating state and operating time of the controllable valve 107, etc., so as to present them to the staff intuitively, but also directly set the expected parameters on the visual command input device 114 to better control the pulp tower cleaning system. It should be understood that the controller provided by the utility model is a central controller controlled by PLC, which can realize the automation of the above process without too much manual intervention.

[0034] The pulp tower body provided by the utility model includes a chemical broadleaf pulp tower, a bleached chemical mechanical pulp tower, a dry damaged pulp tower, and a wet damaged pulp tower. In practical applications, the pulp tower can be cleaned by controlling the opening and closing of the controllable valve included in the corresponding pulp tower, thereby realizing automatic cleaning of the pulp tower and saving labor costs. It should be understood that the utility model can adjust the connection relationship between the chemical broadleaf pulp tower, the bleached chemical mechanical pulp tower, the dry damaged pulp tower, and the wet damaged pulp tower according to actual needs, and is not limited here.

[0035] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A pulp tower cleaning system, characterized in that: include: A slurry tower body, a visual perception device, a liquid storage device, a cleaning nozzle assembly, a cleaning liquid pipeline and a controller, wherein the slurry tower body has a slurry storage cavity, the cleaning nozzle assembly is arranged on the inner wall of the slurry storage cavity, the liquid outlet of the liquid storage device is connected to the liquid inlet of the slurry tower body through the cleaning liquid pipeline, and the liquid inlet of the slurry tower body is connected to the liquid inlet of the cleaning nozzle assembly; The slurry tower cleaning system also includes a controllable valve, which is arranged on the cleaning liquid pipeline. The visual perception device is arranged on the inner wall of the slurry storage chamber. The visual perception device and the controllable valve are both electrically connected to the controller.

2. The slurry tower cleaning system according to claim 1, characterized in that: The cleaning nozzle assembly includes a plurality of nozzles, the liquid outlet of each cleaning liquid pipeline is connected to each of the nozzles, and the plurality of nozzles are distributed along the circumferential direction of the inner wall of the slurry storage chamber.

3. The slurry tower cleaning system according to claim 2, characterized in that: The multiple nozzles include multiple groups of nozzles, each group of nozzles includes multiple nozzles distributed along the circumferential direction of the slurry storage cavity, the multiple groups of nozzles are arranged on the inner wall of the slurry storage cavity along the direction of increasing depth of the slurry storage cavity, and the distribution density of the multiple groups of nozzles increases along the direction of increasing depth of the slurry storage cavity.

4. The slurry tower cleaning system according to claim 2, characterized in that: The included angle between the spraying direction of each of the nozzles and the inner wall of the slurry storage chamber is greater than 0° and less than 180°.

5. The slurry tower cleaning system according to claim 1, characterized in that: The slurry tower cleaning system also includes a waste liquid recycling device, the inlet of the waste liquid recycling device is connected to the waste liquid outlet of the slurry tower body, and the outlet of the waste liquid recycling device is connected to the liquid inlet of the liquid storage device.

6. The slurry tower cleaning system according to claim 5, characterized in that: The waste liquid recycling device includes a filter screen, an ion exchange device and a cleaning liquid preparation container distributed along the direction of the waste liquid outlet away from the slurry tower body, the filter screen is arranged at the inlet of the ion exchange device, the outlet of the ion exchange device is connected to the inlet of the cleaning liquid preparation container, and the outlet of the cleaning liquid preparation container is connected to the liquid inlet of the liquid storage device.

7. The slurry tower cleaning system according to claim 1, characterized in that: The pulp tower cleaning system further comprises a discharge valve, which is arranged at the waste liquid outlet of the pulp tower body and is electrically connected to the controller.

8. The slurry tower cleaning system according to any one of claims 1 to 7, characterized in that: The slurry tower cleaning system also includes a temperature sensor, a pressure transmitter and a flow meter. The probe of the temperature sensor is arranged in the slurry storage chamber, and the pressure transmitter and the flow meter are respectively arranged on the cleaning liquid pipeline; the slurry tower cleaning system also includes a voice alarm device, which is arranged on the slurry tower body. The temperature sensor, the pressure transmitter, the flow meter and the voice alarm device are all electrically connected to the controller.

9. The slurry tower cleaning system according to any one of claims 1 to 7, characterized in that: The pulp tower cleaning system further comprises a visual instruction input device, and the visual instruction input device is electrically connected to the controller.

10. The slurry tower cleaning system according to any one of claims 1 to 7, characterized in that: The pulp tower body comprises at least one of a chemical broadleaf pulp tower, a bleached chemical mechanical pulp tower, a dry damaged pulp tower, and a wet damaged pulp tower.

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