A recirculating water washing system and method thereof

Abstract

This invention discloses a circulating water washing system and method. It includes a cleaning unit, a water storage unit, a water supply unit, a wastewater discharge unit, and a first switching component. The cleaning unit includes a first cleaning component to a third cleaning component. Wastewater generated from inner wall cleaning, outer wall cleaning, and inner wall rinsing is stored in the first to third containers, respectively. During subsequent washing processes, the wastewater discharge unit discharges substandard wastewater from the first container, while the wastewater stored in the second container is supplied to a circulating water tank. Then, the first switching component, based on process requirements, changes the water source connected to the first cleaning component, connecting it to either the first container or the circulating water tank. Wastewater from cleaning the inner wall of the packaging material (which meets water quality standards) or from cleaning the outer wall of the packaging material is used to circulate and clean the inner wall of the packaging material, improving the efficiency of water utilization and reducing water waste.

Description

Technical Field

[0001] This invention relates to the field of packaging material cleaning technology, and in particular to a circulating water washing system and method thereof. Background Technology

[0002] Electrolyte storage tanks are usually used repeatedly, so they need to be cleaned before filling with electrolyte.

[0003] Currently, the industry's cleaning process for electrolyte tanks mainly includes external wall cleaning, internal wall cleaning, and rinsing of both walls. However, before cleaning, the inner wall of the electrolyte tank often has liquid residue, and in extreme cases, even solidified electrolyte additive residue. Therefore, cleaning the inner wall of the electrolyte tank often requires a large amount of water for high-pressure rinsing. This not only consumes a significant amount of water resources but also generates a large amount of wastewater requiring treatment. Currently, mainstream cleaning processes only circulate the rinsing water to clean the inner and outer walls, while the remaining cleaning water is mostly discharged directly as wastewater.

[0004] Therefore, there is an urgent need for a technology that can improve the efficiency of cleaning water utilization. Summary of the Invention

[0005] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a circulating water washing system and method to solve the problem of low utilization efficiency of cleaning water generated during the washing of electrolyte tanks in the prior art.

[0006] In a first aspect, the present invention provides a circulating water washing system, comprising:

[0007] The water supply unit includes a pure water tank, a circulating water tank, and a municipal water tank.

[0008] A cleaning unit, comprising at least a first cleaning component to a third cleaning component, respectively used for cleaning the inner wall and outer wall of the packaging material and rinsing the inner wall of the packaging material;

[0009] The first cleaning component and the second cleaning component are respectively connected to the municipal water tank to obtain the water used for cleaning the inner and outer walls of the packaging material, and the third cleaning component is connected to the pure water tank to obtain the water used for rinsing the inner wall of the packaging material.

[0010] A water storage unit, comprising at least a first container to a third container, for storing wastewater generated from cleaning the inner and outer walls of the packaging material and rinsing the inner wall of the packaging material, respectively;

[0011] The second container is connected to the circulating water tank to introduce wastewater generated from cleaning the outer wall of the packaging material into the circulating water tank;

[0012] A sewage discharge unit, together with the first container, is used to discharge sewage in the first container that does not meet the water quality standards;

[0013] A first switching component is connected to the first cleaning component, the first container, the circulating water tank, and the municipal water tank, respectively. The first switching component is used to change the communication state between the first cleaning component and the first container, the circulating water tank, and the municipal water tank.

[0014] Furthermore, the system includes a second switching component, which is connected to the third container and to the municipal water tank and the circulating water tank, respectively. The second switching component is used to change the communication state between the third container and the municipal water tank and the circulating water tank.

[0015] Furthermore, the system also includes:

[0016] The sewage tank is connected to the first container, the municipal water tank and / or the circulating water tank respectively, and is used to contain sewage in the first container whose water quality does not meet the standards and to contain water overflowing from the municipal water tank and / or the circulating water tank.

[0017] The sewage discharge unit is connected to the first container and the sewage tank respectively, and the sewage discharge unit is used to change the connection state between the first container and the sewage tank.

[0018] Furthermore, the system includes a first overflow pipe, which is connected to the municipal water tank and the sewage tank respectively;

[0019] The municipal water tank is equipped with a first liquid level sensor for detecting the water level in the municipal water tank, and the first overflow pipe changes the connection state between the municipal water tank and the sewage tank according to the water level in the municipal water tank.

[0020] Furthermore, the first switching component includes a first auxiliary module for detecting a first preset parameter of the sewage in the first container, and the first switching component changes the connection state between the first container and the sewage tank according to the first preset parameter value detected by the first auxiliary module.

[0021] The first auxiliary module includes a first conductivity detector and a first acid-base detector, which are used to detect the conductivity and acid-base properties of the wastewater in the first container, respectively.

[0022] Furthermore, the first auxiliary module also includes a first liquid level switch and a second liquid level switch, wherein the first liquid level switch and the second liquid level switch detect different liquid levels.

[0023] Furthermore, the first switching component includes a first three-way ball valve, a second three-way ball valve, and a third three-way ball valve;

[0024] The municipal water tank is connected to the first port of the third three-way ball valve, the second port of the third three-way ball valve is connected to the first port of the second three-way ball valve, and the third port of the second three-way ball valve is connected to the first cleaning component through the first pump.

[0025] The sewage discharge unit includes a first sewage pump, a second sewage pump, and a first filter. A third liquid level switch is provided in the second container, and a second liquid level sensor is provided in the circulating water tank. The circulating water tank is connected to the second container through the second sewage pump to contain the sewage in the second container. The circulating water tank is connected to the third port of the third three-way ball valve through the first filter. The second port of the second three-way ball valve is connected to the first port of the first three-way ball valve, and the second port of the first three-way ball valve is connected to the first container.

[0026] The third port of the first three-way ball valve is connected to the sewage tank through the first sewage pump.

[0027] Furthermore, the water supply unit includes a second pump, the system includes a circulation pump, the second cleaning component is connected to the municipal water tank through the second pump, the municipal water tank is connected to the third container through the circulation pump, the third container is provided with a fourth liquid level switch, and the municipal water tank changes the connection state between the municipal water tank and the third container according to the liquid level value detected by the fourth liquid level switch.

[0028] Furthermore, the water supply unit includes a third pump, the pure water tank is connected to the third cleaning component through the third pump, the second switching component includes a third ball valve and a fourth ball valve, the circulation pump is connected to the municipal water tank through the third ball valve, the third ball valve is used to change the communication state between the municipal water tank and the third container, the third ball valve is connected to the circulation water tank through the fourth ball valve, and the fourth ball valve is used to change the communication state between the circulation water tank and the third ball valve.

[0029] In a second aspect, the present invention provides a circulating water washing method, comprising:

[0030] The inner and outer walls of the packaging material are cleaned in sequence, and then the inner wall of the packaging material is rinsed. The wastewater generated from cleaning the inner and outer walls of the packaging material and rinsing the inner wall of the packaging material is stored separately.

[0031] The wastewater generated by the inner wall of the stored cleaning packaging material is detected. If the first preset parameter value of the wastewater generated by the inner wall of the stored cleaning packaging material reaches the first preset value, it is used as the water for cleaning the inner wall of the packaging material.

[0032] or,

[0033] The wastewater generated from cleaning the outer wall of the packaging material is detected. If the second preset parameter value of the wastewater generated from cleaning the outer wall of the packaging material reaches the second preset value, it is used as water for cleaning the inner wall of the packaging material.

[0034] The first preset parameter includes the wastewater volume, conductivity, and acidity / alkalinity, and the second preset parameter includes the wastewater volume.

[0035] The above-described embodiments of the present invention have at least one or more of the following beneficial effects:

[0036] Wastewater generated from inner wall cleaning, outer wall cleaning, and inner wall rinsing is stored in the first to third containers, respectively. During subsequent water washing, the sewage discharge unit discharges the substandard wastewater from the first container, while the wastewater stored in the second container is supplied to the circulating water tank. Then, the first switching component is used to change the water source connected to the first cleaning component according to process requirements, that is, to connect the first cleaning component to the first container or the circulating water tank. Wastewater generated from cleaning the inner wall of the packaging material with qualified water or wastewater generated from cleaning the outer wall of the packaging material is used to circulate and clean the inner wall of the packaging material, thereby improving the utilization efficiency of cleaning water and reducing the waste of water resources.

[0037] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0038] The disclosure of this invention will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. Furthermore, similar numbers in the drawings are used to denote similar components, wherein:

[0039] Figure 1 This is a schematic diagram of the system framework of a circulating water washing system provided in an embodiment of the present invention;

[0040] Figure 2 This is a flowchart of a circulating water washing method provided in an embodiment of the present invention.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. First container; 10. First acid / alkalinity detector; 11. First conductivity detector; 12. First level switch; 13. Second level switch; 14. First three-way ball valve; 15. First two-stage tight filter; 16. Second three-way ball valve; 17. First booster pump; 18. Second filter; 19. Second check valve;

[0043] 2. Second container; 21. Second two-stage tight filter; 22. Second sewage pump; 23. Third level switch;

[0044] 3. Third container; 30. Fourth level switch; 31. Second acid / alkalinity detector; 32. Second conductivity detector; 33. Third two-stage tight filter; 34. Circulation pump; 35. Third ball valve; 36. Fourth ball valve;

[0045] 4. First cleaning component; 5. Second cleaning component; 6. Third cleaning component;

[0046] 7. Pure water tank; 701. Third filter; 702. Fourth level sensor; 703. Pure water supply pipe; 704. Seventh ball valve; 705. Fifth ball valve;

[0047] 71. Circulating water tank; 711. Second liquid level sensor; 712. First filter; 713. Second overflow pipe; 714. Fourth check valve;

[0048] 72. Municipal water tank; 721. Third three-way ball valve; 722. First liquid level sensor; 723. Fifth filter; 724. Second booster pump; 725. Fourth filter; 726. First overflow pipe; 727. Third check valve; 728. First ball valve;

[0049] 73. Sewage tank; 731. First sewage pump; 732. First check valve;

[0050] 8. First pump; 81. Second pump; 82. Third pump;

[0051] 9. Purge assembly; 91. Internal purging assembly; 92. External purging assembly; 93. Gas storage container; 94. Sixth ball valve; 95. Eighth ball valve. Detailed Implementation

[0052] Some embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0053] As described in the background section, the current mainstream electrolyte tank cleaning process in the industry only circulates the rinsing water to clean the inner and outer walls, while the other cleaning water is mostly discharged directly as wastewater, resulting in a waste of water resources.

[0054] To address one or more of the aforementioned technical problems in the prior art, this invention creatively proposes a circulating water washing system and method. The system uses a water storage unit to separately store wastewater generated from different processes such as inner and outer wall cleaning and inner wall rinsing. Then, during subsequent washing processes, a first switching component is used to switch the specific water source connected to the cleaning unit based on process requirements. This means that wastewater generated from cleaning the inner wall of the packaging material (if the water quality meets standards) or from cleaning the outer wall of the packaging material is used to circulate and clean the inner wall of the packaging material, thereby improving the efficiency of water utilization and reducing water waste.

[0055] The present invention will be specifically described below through specific embodiments.

[0056] Example 1

[0057] Reference Figure 1 As shown, this embodiment of the invention provides a circulating water washing system, which includes: a cleaning unit, a water storage unit, a water supply unit, and a first switching component. The cleaning unit includes at least a first cleaning component 4 to a third cleaning component 6, which are used to clean the inner wall and outer wall of the packaging material, and to rinse the inner wall of the packaging material, respectively.

[0058] In this embodiment, the packaging material is an electrolyte storage tank.

[0059] The water storage unit includes at least three containers: a first container 1 and a third container 3, used to store wastewater generated from cleaning the inner and outer walls of the packaging material and rinsing the inner wall of the packaging material, respectively. The water supply unit includes a pure water tank 7, a circulating water tank 71, and a municipal water tank 72 to provide cleaning water for the corresponding cleaning components. The first cleaning component 4 is connected to the first container 1, the circulating water tank 71, and the municipal water tank 72 via a first switching component, which changes the connection status between the first cleaning component 4 and the first container 1, the circulating water tank 71, and the municipal water tank 72. The first container 1 is connected to a sewage discharge unit for discharging wastewater from the first container 1 that does not meet water quality standards.

[0060] Specifically, when the wastewater quality and water level in the first container 1 are tested and meet the standards, the first switching component connects the first cleaning component 4 with the first container 1, while simultaneously disconnecting the first cleaning component 4 from the other two. The wastewater in the first container 1 can then be directly used to clean the inner wall of the packaging material, reducing water waste and improving wastewater utilization efficiency.

[0061] The second cleaning component 5 is connected to the municipal water tank 72 to obtain water for cleaning the outer wall of the packaging material. The second container 2 is connected to the circulating water tank 71 to send the wastewater generated from cleaning the outer wall of the packaging material into the circulating water tank 71 for subsequent use by the first cleaning component 4, reducing water waste and improving wastewater utilization efficiency. The third cleaning component 6 is connected to the pure water tank 7 to obtain water for rinsing the inner wall of the packaging material.

[0062] The water in the municipal water tank 72 is generally tap water, which is connected to the tap water source through the municipal water supply pipe. The municipal water supply pipe is equipped with a first ball valve 728, which is used to change the connection status between the municipal water tank 72 and the tap water source.

[0063] Specifically, at the start of the washing process, neither the first container 1 nor the circulating water tank 71 contains water. The first switching component connects the first cleaning component 4 to the municipal water tank 72, and the second cleaning component 5 uses only the water from the municipal water tank 72 during the washing process. During the washing of the packaging material, the first container 1 and the second container 2 continuously collect wastewater, and the water in the second container 2 is discharged into the circulating water tank 71. When the water quality and level in the first container 1 meet the standards, the first switching component connects the first cleaning component 4 to the first container 1. When the water quality and / or level in the first container 1 do not meet the standards, but the water level in the circulating water tank 71 meets the standards, the water in the circulating water tank 71 is used; otherwise, the water in the first container 1 is preferred, thus making full use of the wastewater generated from cleaning the inner wall of the packaging material. When only the water in the circulating water tank 71 and the municipal water tank 72 can be used, the first cleaning component 4 is connected to the circulating water tank 71, reusing the wastewater generated from cleaning the outer wall of the packaging material.

[0064] When the water quality in the first container 1 is substandard, the substandard wastewater in the first container 1 is discharged through the sewage discharge unit.

[0065] Preferably, the first container 1 to the third container 3 are arranged sequentially at intervals along a linear direction, the first cleaning component 4 is correspondingly arranged above the first container 1, the second cleaning component 5 is correspondingly arranged above the second container 2, and the third cleaning component 6 is correspondingly arranged above the third container 3. This shortens the distance between each process, reduces the space occupied by the system, and also improves the washing efficiency.

[0066] Preferably, the first container 1 to the third container 3 are integrally molded, which saves the space occupied by the system and facilitates the transport of packaging materials to different washing processes.

[0067] In this embodiment, the first container 1 to the third container 3 are all troughs with one end open. Each cleaning component is located directly above the corresponding container, and the opening of the container faces the cleaning component so as to receive and contain the wastewater generated during the washing process.

[0068] The first cleaning component 4 and the third cleaning component 6 are both spray balls, and the second cleaning component 5 is a spray hood, which includes a hood covering the outer wall of the packaging material, and the inner wall of the hood is densely covered with multiple spray heads.

[0069] Furthermore, the system also includes a second switching component, which is connected to the municipal water tank 72 and the circulating water tank 71 respectively. The second switching component is used to change the connection state between the third container 3 and the aforementioned two.

[0070] Specifically, when rinsing the outer wall of the packaging material, the third container 3 receives and contains the wastewater generated during rinsing the outer wall of the packaging material, and discharges the water to the municipal water tank 72 when the water level in the container reaches the standard, so as to replenish the water in the municipal water tank 72 in a timely manner; when the water in the municipal water tank 72 is full, the second switching component connects the third container 3 to the circulating water tank 71 to replenish the water in the circulating water tank 71.

[0071] Furthermore, the system also includes a sewage tank 73, which is connected to the first container 1, the municipal water tank 72, and / or the circulating water tank 71, respectively, for containing substandard sewage in the first container 1 and water overflowing from the municipal water tank 72 and / or the circulating water tank 71. The first container 1 is connected to the sewage tank 73 via a sewage discharge unit.

[0072] Furthermore, the municipal water tank 72 is connected to a first overflow pipe 726, which is connected to the sewage tank 73. A first liquid level sensor 722 is installed in the municipal water tank 72 to detect the water level in the municipal water tank 72. The first overflow pipe 726 changes the connection state between the municipal water tank 72 and the sewage tank 73 according to the water level in the municipal water tank 72.

[0073] Preferably, a third check valve 727 is provided between the first overflow pipe 726 and the sewage tank 73 to prevent backflow of water discharged through the first overflow pipe 726; a fourth check valve 714 is provided between the second overflow pipe 713 and the sewage tank 73 to prevent backflow of water discharged through the second overflow pipe 713.

[0074] Specifically, the water in the third container 3 is preferentially discharged into the municipal water tank 72. After the first level sensor 722 detects that the water level in the municipal water tank 72 has reached the required level, the second switching component connects the third container 3 with the circulating water tank 71. When the water level in the circulating water tank 71 reaches the required level, the second switching component connects the third container 3 with the municipal water tank 72 again. After the first level sensor 722 detects that the water level in the municipal water tank 72 has reached the overflow requirement, the water in the municipal water tank 72 overflows into the sewage tank 73 through the first overflow pipe 726 to avoid excessive water in the municipal water tank 72.

[0075] It is understandable that when the water volume in the third container 3 is large and the flow rate is fast, the overflow from the municipal water tank 72 through the first overflow pipe 726 alone cannot meet the drainage requirements. At this time, the circulating water tank 71 can be used to drain water into the sewage tank 73 through the second overflow pipe 713.

[0076] Furthermore, the first switching component includes a first auxiliary module for detecting parameters of the sewage in the first container 1. The first switching component changes the connection state between the first container 1 and the sewage tank 73 according to the values ​​detected by the first auxiliary module. The first auxiliary module includes a first conductivity detector 11 and a first acidity / alkalinity detector 10, which are used to detect the conductivity and acidity / alkalinity of the sewage in the first container 1, respectively.

[0077] Preferably, the sewage discharge unit is connected to the first switching component and determines its working status based on the value detected by the first auxiliary module, that is, whether to discharge the sewage in the first container 1 into the first container 1.

[0078] Specifically, the sewage discharge unit includes a first sewage pump 731, one end of which is connected to the first container 1 to pump out the sewage in the first container 1.

[0079] In this embodiment, the water in the first container can be used for cyclic cleaning of the inner wall of the packaging material when the pH value is within 7±2 and the conductivity is less than 3000μs / cm.

[0080] Furthermore, the first auxiliary module also includes a first liquid level switch 12 and a second liquid level switch 13, wherein the first liquid level switch 12 and the second liquid level switch 13 detect different liquid levels.

[0081] Specifically, in actual use, the detection level of the first liquid level switch 12 is set higher than the detection level of the second liquid level switch 13. After the second liquid level switch 13 is triggered and opened, the first conductivity detector 11 and the first acid-base detector 10 start to detect the conductivity and acid-base properties of the water in the first container 1 in real time. When the conductivity and acid-base properties of the water in the first container 1 meet the standards, and continue to meet the standards until the first liquid level switch 12 is triggered and opened, the first switching component connects the first cleaning component 4 with the first container 1 to realize the self-circulation of wastewater for cleaning the inner wall of the packaging material.

[0082] Furthermore, the first switching component includes a first three-way ball valve 14, a second three-way ball valve 16, and a third three-way ball valve 721; the municipal water tank 72 is connected to the first interface of the third three-way ball valve 721, the second interface of the third three-way ball valve 721 is connected to the first interface of the second three-way ball valve 16, and the third interface of the second three-way ball valve 16 is connected to the first cleaning component 4 through the first pump 8.

[0083] The second container 2 is equipped with a third liquid level switch 23, and the circulating water tank 71 is equipped with a second liquid level sensor 711. The circulating water tank 71 is connected to the second container 2 through a second sewage pump 22 to contain the sewage in the second container 2. The circulating water tank 71 is connected to the third port of the third three-way ball valve 721 through a first filter 712. The second port of the second three-way ball valve 16 is connected to the first port of the first three-way ball valve 14. The second port of the first three-way ball valve 14 is connected to the first container 1.

[0084] The third port of the first three-way ball valve 14 is connected to the sewage tank 73 via the first sewage pump 731. The second cleaning component 5 is connected to the municipal water tank 72 via the second pump 81.

[0085] In this embodiment, all ball valves are pneumatic ball valves.

[0086] It should be noted that the first and second ports of a three-way ball valve refer to two ports along the same linear direction. The distinction between the first and second ports is only used in the description and there is no difference between them in actual use. The third port refers to the port that is perpendicular to the first and second ports.

[0087] Preferably, a first check valve 732 is provided between the first sewage pump 731 and the sewage tank 73 to prevent sewage flowing into the sewage tank 73 from flowing back;

[0088] Preferably, the third port of the second three-way ball valve 16 is connected in sequence to the first pump 8 via a first booster pump 17 and a second filter 18. The first booster pump 17 increases the pumping pressure of the pipeline, and the second filter 18 filters out impurities contained in the water in the municipal water tank 72.

[0089] Preferably, a first two-stage tight filter 15 is connected between the first three-way ball valve 14 and the second three-way ball valve 16 to fully filter out impurities in the water in the first container 1, thereby extending the water usage time in the first container 1. A second one-way valve 19 is connected between the first cleaning component 4 and the first pump 8 to prevent backflow of water into the first cleaning component 4.

[0090] Preferably, a second booster pump 724 is connected between the second pump 81 and the municipal water tank 72 to improve the pumping performance of the pipeline; a fifth filter 723 is provided between the municipal water tank 72 and the second booster pump 724, and a fourth filter 725 is provided between the second booster pump 724 and the second pump 81. Through dual filtration, impurities in the water entering the second cleaning component 5 are greatly reduced, while reducing wear on the pump.

[0091] Specifically, when the inner wall of the packaging material is cleaned, the first pump 8 and the first booster pump 17 draw water from the municipal water tank 72. The water used to clean the inner wall of the packaging material flows from the municipal water tank 72 to the first port and the second port of the third three-way ball valve 721, the first port of the second three-way ball valve 16, the first booster pump 17, the second filter 18, the first pump 8, the second check valve 19, and then to the first cleaning assembly 4 to clean the inner wall of the packaging material.

[0092] When cleaning the inner wall of the packaging material, the first container 1 continuously receives and contains wastewater. When the second liquid level switch 13 detects the water level, based on some of the first preset parameter values ​​detected by the first conductivity detector 11 and the first acid-base detector 10, if the detected first preset parameter value does not meet the standard, the first sewage pump 731 draws the wastewater from the first container 1, so that the wastewater in the first container 1 enters the wastewater tank 73 after passing through the second port and the third port of the first three-way ball valve 14, the first sewage pump 731 and the first one-way valve 732 in sequence. If the water quality meets the standard and is maintained until the first liquid level switch 12 detects the water level, the first cleaning component 4 is connected to the first container 1. The first booster pump 17 and the first pump 8 draw water from the first container 1, so that the water in the first container 1 passes through the second port, the first port, the first two-stage tight filter 15, the second port, the third port, the first booster pump 17, the second filter 18, the first pump 8, and the second check valve 19 in sequence before entering the second cleaning component 5 to clean the inner wall of the packaging material.

[0093] After the first conductivity detector 11 and the first acid-base detector 10 detect that some of the first preset parameter values ​​in the first container 1 meet the standards and the cleaning time of the inner wall of the packaging material is reached, the cleaning of the inner wall of the packaging material is stopped, the time requirement for cleaning the outer wall of the packaging material is set, and then the packaging material is transported to the second cleaning component 5.

[0094] It is understandable that when using the water in the first container 1 to clean the inner wall of the packaging material, if the first preset parameter of the water in the first container 1 is detected to be substandard, the water source of the first cleaning component 4 will be immediately switched to the municipal water tank 72 or the circulating water tank 71.

[0095] When cleaning the outer wall of the packaging material begins, the second pump 81 and the second booster pump 724 draw water from the municipal water tank 72. The water in the municipal water tank 72 passes sequentially through the fifth filter 723, the second booster pump 724, the fourth filter 725, and the second pump 81 before entering the second cleaning component 5 to clean the outer wall of the packaging material. The second container 2 continuously receives and holds wastewater. When the third level switch 23 detects the water level, the second drain pump 22 draws water from the second container 2. The water in the second container 2 passes sequentially through the second two-stage tight filter 21 and the second drain pump 22 before entering the circulating water tank 71 for cleaning the inner wall of the packaging material. When the first preset parameters (water level and / or water quality) in the first container 1 are not up to standard, the second level sensor 711 detects that the water level in the circulating water tank 71 is up to standard, and the first cleaning component 4 prioritizes using the water in the circulating water tank 71.

[0096] Once the required cleaning time for the outer wall of the packaging material has been reached, the second cleaning component 5 stops cleaning the outer wall of the packaging material and sets the required rinsing time for the inner wall of the packaging material, and then transports the packaging material to the third cleaning component 6.

[0097] Furthermore, the municipal water tank 72 is connected to the third container 3 via a circulation pump 34. The third container 3 is equipped with a fourth liquid level switch 30. The circulation pump 34 changes the connection state between the municipal water tank 72 and the third container 3 according to the liquid level value measured by the fourth liquid level switch 30.

[0098] Furthermore, the pure water tank 7 is connected to the third cleaning component 6 via the third pump 82. The second switching component includes a second auxiliary module, which includes a second conductivity detector 32 and a second acidity / alkalinity detector 31, respectively used to detect the conductivity and acidity / alkalinity of the sewage in the third container 3.

[0099] In this embodiment, when the second conductivity detector 32 and the second acid-base detector 31 respectively detect that the water quality in the third container 3 reaches a conductivity of less than 20 μs / cm and a pH value of 7 ± 0.05, it is determined that the inner wall cleaning is completed.

[0100] The second switching component includes a third ball valve 35 and a fourth ball valve 36. The circulating pump 34 is connected to the municipal water tank 72 through the third ball valve 35. The third ball valve 35 is used to change the connection state between the municipal water tank 72 and the third container 3. The third ball valve 35 is connected to the circulating water tank 71 through the fourth ball valve 36. The fourth ball valve 36 is used to change the connection state between the circulating water tank 71 and the third ball valve 35.

[0101] Preferably, a third filter 701 is connected between the pure water tank 7 and the third pump 82, which reduces impurities in the pure water and reduces wear on the third pump 82.

[0102] Preferably, a fifth ball valve 705 connects the third pump 82 and the third cleaning component 6 to change the connection between the pure water tank 7 and the third cleaning component 6. A fourth level sensor 702 is installed in the pure water tank 7, which is connected to a pure water source via a pure water supply pipe 703. A seventh ball valve 704 is installed in the pure water supply pipe 703 to change the connection between the pure water source and the pure water tank 7. When the fourth level sensor 702 detects insufficient water level in the pure water tank 7, the seventh ball valve 704 opens to replenish pure water in a timely manner.

[0103] Preferably, a third two-stage tight filter 33 is connected between the third container 3 and the circulation pump 34 to filter the sewage flowing from the third container 3 to the municipal water tank 72, thereby improving the cleanliness of the sewage and reducing the wear of the circulation pump 34.

[0104] Specifically, during the rinsing of the inner wall of the packaging material, the third pump 82 draws water from the pure water tank 7, causing the water in the pure water tank 7 to pass sequentially through the third filter 701, the third pump 82, and the fifth ball valve 705 before entering the third cleaning assembly 6 to rinse the inner wall of the packaging material. Rinsing of the inner wall of the packaging material stops after the detection values ​​of the second conductivity meter 32 and the second acid / alkalinity meter 31 reach the required rinsing time. The third container 3 receives and contains the wastewater generated during the rinsing of the inner wall of the packaging material. When the fourth level switch 30 detects the water level, the circulation pump 34 draws water from the third container 3, causing the water in the third container 3 to pass sequentially through the third two-stage tight filter 33, the circulation pump 34, and the third ball valve 35 before entering the municipal water tank 72 to replenish the water volume in the municipal water tank 72.

[0105] When the water level in the municipal water tank 72 reaches a certain level, the fourth ball valve 36 opens, and the water in the third container 3 flows simultaneously into the municipal water tank 72 and the circulating water tank 71. When the water levels in both the municipal water tank 72 and the circulating water tank 71 reach their maximum, the fourth ball valve 36 closes, and the water in the third container 3 continues to flow into the municipal water tank 72. Then, the water in the municipal water tank 72 overflows into the sewage tank 73 through the first overflow pipe 726.

[0106] In this embodiment, the volume of the first container 1 is greater than 50L to ensure that the cleaning water stored in the first container 1 is sufficient for self-circulation; the volume of the second container 2 is greater than 30L and less than 40L, and the water inside it is not self-circulated; the volume of the third container 3 is less than 15L to ensure that the water inside it can flow out quickly, so as to ensure that the water detected by the fourth liquid level switch 30 in the third container 3 is the freshest water.

[0107] Furthermore, the system also includes a purging assembly 9 for purging the inner and outer walls of the packaging material.

[0108] Furthermore, the purging assembly 9 includes a gas storage container 93, a sixth ball valve 94, an eighth ball valve 95, an external purging assembly 92, and an internal purging assembly 91; the eighth ball valve 95 is connected to the internal purging assembly 91, the sixth ball valve 94 is connected to the external purging assembly 92, and then the sixth ball valve 94 and the eighth ball valve 95 are connected together to the gas storage container 93.

[0109] The structure of the external blowing component 92 is similar to that of the second cleaning component 5.

[0110] Preferably, the internal blowing assembly 91 is shared with the third cleaning assembly 6, saving parts and reducing manufacturing costs. Specifically, one end of the sixth ball valve 94 is connected to the pipeline between the fifth ball valve 705 and the third cleaning assembly 6, and the other end is connected to the gas storage container 93 together with the eighth ball valve 95.

[0111] For example, compressed air is stored in the air storage container 93.

[0112] Specifically, after rinsing the inner wall of the packaging material, the fifth ball valve 705 is closed, and the sixth ball valve 94 and the eighth ball valve 95 are opened. Compressed air enters the inner blowing assembly 91 and the outer blowing assembly 92 respectively to blow the inner and outer walls of the packaging material.

[0113] After rinsing the inner wall, the inner blowing component 91, also known as the third cleaning component 6, still contains pure water. When blowing the inner wall, the residual pure water can still be used to pressure rinse the inner wall of the packaging material, thereby improving the cleanliness of the inner wall of the packaging material.

[0114] Example 2

[0115] Corresponding to Embodiment 1 above, the present invention also provides a circulating water washing method. In this embodiment, the content that is the same as or similar to that in Embodiment 1 above can be referred to the above description, and will not be repeated hereafter. (See reference...) Figure 1 As shown, the circulating water washing method includes:

[0116] S100. Clean the inner wall and outer wall of the packaging material in sequence, then rinse the inner wall of the packaging material, and store the wastewater generated from cleaning the inner wall and outer wall of the packaging material and rinsing the inner wall of the packaging material respectively.

[0117] Specifically, the packaging material is transported to the cleaning unit, where the inner and outer walls of the packaging material are first cleaned using the first cleaning component 4 and the second cleaning component 5, respectively. Then, the inner wall of the packaging material is rinsed using the third cleaning component 6. During the washing process, the wastewater generated in each step flows into the corresponding container.

[0118] Understandably, during the washing process, each cleaning component can wash different packaging materials to improve washing efficiency.

[0119] S200. Detect the wastewater generated on the inner wall of the stored cleaning packaging material. If the first preset parameter value of the wastewater generated on the inner wall of the stored cleaning packaging material reaches the first preset value, then use it as water for cleaning the inner wall of the packaging material.

[0120] And / or,

[0121] The wastewater generated from cleaning the outer wall of the packaging material is detected. If the second preset parameter value of the wastewater generated from cleaning the outer wall of the packaging material reaches the second preset value, it is used as water for cleaning the inner wall of the packaging material.

[0122] The first preset parameter includes the wastewater volume, conductivity, and acidity / alkalinity, while the second preset parameter includes the wastewater volume.

[0123] Specifically, after the washing begins, wastewater is collected in all three containers. When the first level switch 12 detects the water level, the first conductivity detector 11 and the first acid-base detector 10 start to detect the conductivity and acid-base properties of the wastewater in the first container 1. If the wastewater quality in the first container 1 does not meet the water quality requirements of the first preset value, the wastewater in the first container 1 is discharged from the first container 1. When the second level switch 13 detects the water level and the conductivity and acid-base properties of the wastewater detected by the first conductivity detector 11 and the first acid-base detector 10 meet the requirements of the first preset value, the first switching component switches the water source of the first cleaning component 4 to the first container 1, thereby recycling the wastewater generated from cleaning the inner wall of the packaging material. The water quality in the first container 1 is monitored throughout the cleaning process. When the acid-base properties and conductivity do not meet the standards, the connection between the first container 1 and the first cleaning component 4 is cut off, and other water sources are used to supply water to the first cleaning component 4.

[0124] When the third liquid level switch 23 detects that the water level in the second container 2 has reached the target level, that is, the second preset parameter value of the wastewater generated from cleaning the outer wall of the packaging material has reached the second preset value, the first switching component switches the water supply source of the first cleaning component 4 to the second container 2, thereby recycling the wastewater from cleaning the outer wall of the packaging material to clean the inner wall of the packaging material. In this embodiment, it is preferable to use the wastewater in the first container that has reached the first preset value.

[0125] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0126] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0127] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A circulating water washing system, characterized in that, The system includes: The water supply unit includes a pure water tank, a circulating water tank, and a municipal water tank. A cleaning unit, comprising at least a first cleaning component to a third cleaning component, respectively used for cleaning the inner wall and outer wall of the packaging material and rinsing the inner wall of the packaging material; The first cleaning component and the second cleaning component are respectively connected to the municipal water tank to obtain the water used for cleaning the inner and outer walls of the packaging material, and the third cleaning component is connected to the pure water tank to obtain the water used for rinsing the inner wall of the packaging material. A water storage unit includes at least a first container to a third container, which are used to store wastewater generated from cleaning the inner wall and outer wall of the packaging material and rinsing the inner wall of the packaging material, respectively. The second container is connected to the circulating water tank to introduce wastewater generated from cleaning the outer wall of the packaging material into the circulating water tank; A sewage discharge unit, which is connected to the first container, is used to discharge sewage in the first container that does not meet the water quality standards; A first switching component is connected to the first cleaning component, the first container, the circulating water tank, and the municipal water tank, respectively. The first switching component is used to change the communication state between the first cleaning component and the first container, the circulating water tank, and the municipal water tank.

2. The circulating water washing system according to claim 1, characterized in that, The system includes a second switching component, which is connected to the third container and to the municipal water tank and the circulating water tank, respectively. The second switching component is used to change the communication state between the third container and the municipal water tank and the circulating water tank.

3. The circulating water washing system according to claim 2, characterized in that, The system also includes: The sewage tank is connected to the first container, the municipal water tank and / or the circulating water tank respectively, and is used to contain sewage in the first container whose water quality does not meet the standards and to contain water overflowing from the municipal water tank and / or the circulating water tank. The sewage discharge unit is connected to the first container and the sewage tank respectively, and the sewage discharge unit is used to change the connection state between the first container and the sewage tank.

4. The circulating water washing system according to claim 3, characterized in that, The system includes a first overflow pipe, which is connected to the municipal water tank and the sewage tank respectively; The municipal water tank is equipped with a first liquid level sensor for detecting the water level in the municipal water tank, and the first overflow pipe changes the connection state between the municipal water tank and the sewage tank according to the water level in the municipal water tank.

5. The circulating water washing system according to claim 3, characterized in that, The first switching component includes a first auxiliary module for detecting a first preset parameter of the wastewater in the first container. The first switching component changes the connection state between the first container and the wastewater pool according to the value of the first preset parameter detected by the first auxiliary module. The first auxiliary module includes a first conductivity detector and a first acid-base detector, which are used to detect the conductivity and acid-base properties of the wastewater in the first container, respectively.

6. The circulating water washing system according to claim 5, characterized in that, The first auxiliary module also includes a first liquid level switch and a second liquid level switch, wherein the first liquid level switch and the second liquid level switch detect different liquid levels.

7. The circulating water washing system according to claim 6, characterized in that, The first switching component includes a first three-way ball valve, a second three-way ball valve, and a third three-way ball valve; The municipal water tank is connected to the first port of the third three-way ball valve, the second port of the third three-way ball valve is connected to the first port of the second three-way ball valve, and the third port of the second three-way ball valve is connected to the first cleaning component through the first pump. The sewage discharge unit includes a first sewage pump, a second sewage pump, and a first filter. A third liquid level switch is provided in the second container, and a second liquid level sensor is provided in the circulating water tank. The circulating water tank is connected to the second container through the second sewage pump to contain the sewage in the second container. The circulating water tank is connected to the third port of the third three-way ball valve through the first filter. The second port of the second three-way ball valve is connected to the first port of the first three-way ball valve, and the second port of the first three-way ball valve is connected to the first container. The third port of the first three-way ball valve is connected to the sewage tank through the first sewage pump.

8. The circulating water washing system according to claim 2, characterized in that, The water supply unit includes a second pump, the system includes a circulation pump, the second cleaning component is connected to the municipal water tank through the second pump, the municipal water tank is connected to the third container through the circulation pump, the third container is provided with a fourth liquid level switch, and the municipal water tank changes the connection state between the municipal water tank and the third container according to the liquid level value detected by the fourth liquid level switch.

9. The circulating water washing system according to claim 8, characterized in that, The water supply unit includes a third pump. The pure water tank is connected to the third cleaning component through the third pump. The second switching component includes a third ball valve and a fourth ball valve. The circulation pump is connected to the municipal water tank through the third ball valve. The third ball valve is used to change the communication state between the municipal water tank and the third container. The third ball valve is connected to the circulation tank through the fourth ball valve. The fourth ball valve is used to change the communication state between the circulation tank and the third ball valve.

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