Papermaking sewage recycling system

Abstract

The utility model relates to a papermaking sewage recycling system which comprises a water collecting tank, a sewage treatment mechanism, a recycling water tank and a water conveying mechanism, the water collecting tank is connected with the sewage treatment mechanism through a pipeline, the recycling water tank is connected with the sewage treatment mechanism through a pipeline, and the recycling water tank is used for recycling and storing treated sewage; the sewage treatment mechanism comprises a cooling water tank, a cooling tower and a polyacrylamide dissolving tank; the cooling water tank is connected with the recycling water tank through a pipeline and is connected with the cooling tower through a pipeline, and the cooling water tank is used for supplying water to the cooling tower; the polyacrylamide medicine dissolving tank is connected with the recycling water tank through a pipeline; the water conveying mechanism is used for conveying sewage in the recycling water tank to the cooling water tank and the polyacrylamide medicine dissolving tank. According to the papermaking sewage recycling system, sewage is effectively recycled, water resources are saved, the use of clear water is reduced, the cost is reduced, the sewage discharge amount is reduced, the pollution to the environment is reduced, and the environmental protection property is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of papermaking sewage treatment, and particularly relates to a papermaking sewage recycling system. Background Art

[0002] In papermaking production, waste paper, straw, wood pulp, etc. are mostly used as papermaking raw materials. The production of pulp and paper generally consists of processes such as pulping, washing pulp, bleaching, and papermaking. Pulping in the paper industry includes alkaline pulping, chemimechanical pulping, and mechanical pulping; sewage will be generated during papermaking production. If the sewage is directly discharged, it will pollute the environment, be unfavorable for environmental protection, and there is no recycling, wasting water resources; therefore, it is necessary to treat the sewage and discharge it after reaching the standard. Due to the lack of recycling, the sewage discharge volume is large, wasting water resources. Content of the Utility Model

[0003] Therefore, it is necessary to provide a papermaking sewage recycling system to solve the technical problems that sewage will be generated during papermaking production. If the sewage is directly discharged, it will pollute the environment, be unfavorable for environmental protection, and there is no recycling, wasting water resources; therefore, it is necessary to treat the sewage and discharge it after reaching the standard. Due to the lack of recycling, the sewage discharge volume is large, wasting water resources.

[0004] To achieve the above object, the inventor provides a papermaking sewage recycling system, including a collecting tank, a sewage treatment mechanism, a reused water tank, and a water conveying mechanism;

[0005] The collecting tank is connected to the sewage treatment mechanism through a pipeline. The collecting tank is used for collecting and storing the sewage from the production workshop; the sewage treatment mechanism is used for treating and purifying the sewage from the production workshop for up-to-standard discharge;

[0006] The reused water tank is connected to the sewage treatment mechanism through a pipeline. The reused water tank is used for recycling and storing the treated sewage;

[0007] The sewage treatment mechanism includes a cooling water tank, a cooling tower, and a polyacrylamide drug dissolving tank;

[0008] The cooling water tank is connected to the reused water tank through a pipeline. The cooling water tank is connected to the cooling tower through a pipeline. The cooling water tank is used for supplying water to the cooling tower;

[0009] The polyacrylamide drug dissolving tank is connected to the reused water tank through a pipeline;

[0010] The water conveying mechanism is used for conveying the sewage in the reused water tank to the cooling water tank and the polyacrylamide drug dissolving tank.

[0011] As a preferred structure of the present utility model, the water conveyance mechanism includes a first water pump and a second water pump;

[0012] The first water pump is arranged on the pipeline between the cooling water pool and the recycled water pool;

[0013] The second water pump is arranged on the pipeline between the polyacrylamide drug dissolving pool and the recycled water pool.

[0014] As a preferred structure of the present utility model, the water conveyance mechanism includes a first water pump, and the papermaking sewage recycling system further includes a first detection mechanism and a control mechanism;

[0015] The first water pump is arranged on the pipeline between the cooling water pool and the recycled water pool, and the first water pump is electrically connected to the control mechanism;

[0016] The first detector is arranged in the cooling water pool, the first detection mechanism is electrically connected to the control mechanism, and the first detection mechanism is used to detect the water level height of the cooling water pool;

[0017] The control mechanism is used to receive and feedback the detection signal of the first detection mechanism, and control the start or stop of the first water pump.

[0018] As a preferred structure of the present utility model, the water conveyance mechanism includes a second water pump, and the papermaking sewage recycling system further includes a second detection mechanism and a control mechanism;

[0019] The second water pump is arranged on the pipeline between the polyacrylamide drug dissolving pool and the recycled water pool, and the second water pump is electrically connected to the control mechanism;

[0020] The second detector is arranged in the polyacrylamide drug dissolving pool, the second detection mechanism is electrically connected to the control mechanism, and the second detection mechanism is used to detect the water level height of the polyacrylamide drug dissolving pool;

[0021] The control mechanism is used to receive and feedback the detection signal of the second detection mechanism, and control the start or stop of the second water pump.

[0022] As a preferred structure of the present utility model, the recycled water pool is connected to the main pipe of the fire protection pipeline in the production workshop through a pipeline, and the water conveyance mechanism is also used to convey the treated sewage in the recycled water pool to the fire protection pipeline.

[0023] As a preferred structure of the present utility model, the water conveyance mechanism includes a third water pump, and the papermaking sewage recycling system further includes a third detection mechanism and a control mechanism;

[0024] The third water pump is arranged on the pipeline between the reclaimed water tank and the main pipe of the fire pipeline, and the third water pump is electrically connected to the control mechanism;

[0025] The third detection mechanism is arranged on the main pipe of the fire pipeline, and the third detection mechanism is electrically connected to the control mechanism. The third detection mechanism is used to detect the water pressure in the main pipe of the fire pipeline;

[0026] The control mechanism is used to receive and feedback the detection signal of the third detection mechanism, and control the start or stop of the third water pump.

[0027] As a preferred structure of the present invention, the papermaking sewage recycling system further includes a spray pond and a multi-disc thickener. The spray pond is connected to the reclaimed water tank through a pipeline. The water conveying mechanism is further used to convey the sewage in the reclaimed water tank to the spray pond. The spray pond is connected to the multi-disc thickener through a pipeline. The spray pond is used to supply water to the disc thickener;

[0028] The collecting tank is connected to the multi-disc thickener through a pipeline.

[0029] As a preferred structure of the present invention, the water conveying mechanism includes a fourth water pump. The papermaking sewage recycling system further includes a fourth detection mechanism and a control mechanism;

[0030] The fourth water pump is arranged on the pipeline between the spray pond and the reclaimed water tank, and the fourth water pump is electrically connected to the control mechanism;

[0031] The fourth detection mechanism is arranged in the spray pond, and the fourth detection mechanism is electrically connected to the control mechanism. The fourth detection mechanism is used to detect the water level height in the spray pond;

[0032] The control mechanism is used to receive and feedback the detection signal of the fourth detection mechanism, and control the start or stop of the fourth water pump.

[0033] As a preferred structure of the present invention, the sewage treatment mechanism includes a primary sedimentation tank, an acidification tank, an anaerobic tower, an oxidation ditch, a secondary sedimentation tank and a deep treatment tank group;

[0034] The collecting tank is connected to the cooling tower through a pipeline;

[0035] The collecting tank is connected to the multi-disc thickener through a pipeline. The multi-disc thickener is connected to the primary sedimentation tank through a pipeline. The cooling tower is connected to the primary sedimentation tank through a pipeline;

[0036] The primary sedimentation tank is connected to the acidification tank through a pipeline. The anaerobic tower is connected to the acidification tank through a pipeline. The oxidation ditch is connected to the anaerobic tower through a pipeline. The secondary sedimentation tank is connected to the oxidation ditch through a pipeline. The advanced treatment tank group is connected to the secondary sedimentation tank through a pipeline. The recycled water tank is connected to the advanced treatment tank group through a pipeline;

[0037] The polyacrylamide drug dissolving tank is connected to the advanced treatment tank group through a pipeline.

[0038] As a preferred structure of the present utility model, the papermaking sewage recycling system further includes a first connecting pipeline and a fifth water pump. One end of the first connecting pipeline is connected to the acidification tank, and the other end of the first connecting pipeline is connected to the oxidation ditch;

[0039] The fifth water pump is arranged on the first connecting pipeline, and the fifth water pump is used to directly transport the sewage in the acidification tank into the oxidation ditch.

[0040] Different from the prior art, the beneficial effects of the above technical solution are as follows: In the papermaking sewage recycling system of the present utility model, the sewage generated in the papermaking production workshop is treated and purified by the sewage treatment mechanism so as to meet the discharge standards, reduce environmental pollution, and improve environmental protection. Then, all the treated sewage flows into the recycled water tank, and the recycled water tank recovers and stores the treated sewage, enabling the recycling of water resources, avoiding waste of water resources, and improving environmental protection. Moreover, the sewage in the recycled water tank is transported to the cooling water tank for use by the cooling tower through the water transportation mechanism, and the sewage in the recycled water tank is transported to the polyacrylamide drug dissolving tank to dissolve the polyacrylamide with the sewage in the recycled water tank, effectively recycling the sewage, saving water resources, reducing the use of fresh water, reducing costs, reducing sewage discharge, reducing environmental pollution, improving environmental protection, and achieving energy conservation, emission reduction, and clean production.

[0041] The above relevant description of the utility model content is only an overview of the technical solution of this application. In order to enable those of ordinary skill in the art to more clearly understand the technical solution of this application, and then can be implemented according to the content recorded in the description and the drawings, and in order to make the above objects, other objects, features, and advantages of this application more easily understood, the following is described in conjunction with the specific implementation manners and drawings of this application. Description of the Drawings

[0042] The drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of the specific implementation manners and other related contents of this application, and should not be considered as a limitation to this application.

[0043] In the drawings of the specification:

[0044] Figure 1One of the process schematic diagrams of the paper-making sewage recycling system described in the specific implementation mode;

[0045] Figure 2 One of the process schematic diagrams of the paper-making sewage recycling system described in the specific implementation mode;

[0046] Figure 3 One of the process schematic diagrams of the paper-making sewage recycling system described in the specific implementation mode;

[0047] Figure 4 Partial process schematic diagram of the paper-making sewage recycling system described in the specific implementation mode;

[0048] Figure 5 Schematic diagram of the circuit connection of the paper-making sewage recycling system described in the specific implementation mode.

[0049] The descriptions of the reference numerals involved in the above-mentioned drawings are as follows:

[0050] 1. Collection tank

[0051] 2. Multi-disc thickener

[0052] 3. Primary sedimentation tank

[0053] 4. Acidification tank

[0054] 5. Anaerobic tower

[0055] 6. Oxidation ditch

[0056] 7. Secondary sedimentation tank

[0057] 8. Advanced treatment tank group

[0058] 81. Coagulation reaction tank

[0059] 82. Coagulation sedimentation tank

[0060] 83. Fenton reaction tank

[0061] 84. Fenton sedimentation tank

[0062] 9. Reclaimed water tank

[0063] 10. Spray pond

[0064] 11. Cooling pond

[0065] 12. Cooling tower

[0066] 13. Polyacrylamide drug dissolving tank

[0067] 14. Fire protection pipeline

[0068] 15. First detection agency

[0069] 16. The second testing agency,

[0070] 17. The third testing agency,

[0071] 18. The fourth testing agency,

[0072] 19. The first water pump,

[0073] 20. The second water pump,

[0074] 21. The third water pump,

[0075] 22. The fourth water pump,

[0076] 23. The fifth water pump,

[0077] 24. The first connecting pipeline,

[0078] 25. The control mechanism. Detailed implementation manners

[0079] To describe in detail the possible application scenarios, technical principles, implementable specific solutions, achievable purposes and effects of this application, the following will be described in detail with reference to the specific examples listed and in conjunction with the accompanying drawings. The examples described in this article are only used to more clearly illustrate the technical solutions of this application, so they are only examples and cannot be used to limit the protection scope of this application.

[0080] Referring to "embodiments" in this article means that the specific features, structures or characteristics described in combination with the embodiments can be included in at least one embodiment of this application. The term "embodiment" that appears in various positions in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0081] Unless otherwise defined, the meanings of the technical terms used in this article are the same as those generally understood by those skilled in the technical field to which this application belongs; the use of relevant terms in this article is only for describing specific embodiments and is not intended to limit this application.

[0082] In the description of this application, the phrase "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: there is A, there is B, and there is both A and B at the same time. In addition, the character " / " in this article generally represents an "or" logical relationship between the associated objects before and after.

[0083] In this application, terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantitative, primary-secondary, or sequential relationship between these entities or operations.

[0084] Without further limitation, in this application, the expressions such as "including", "comprising", "having", or other similar expressions used in a statement are intended to cover non-exclusive inclusion. These expressions do not exclude that there may be additional elements in the process, method, or product including the said elements. Thus, in a process, method, or product including a series of elements, it can include not only those defined elements, but also other elements not explicitly listed, or elements inherent to such process, method, or product.

[0085] Similar to the understanding in the "Examination Guidelines", in this application, expressions such as "greater than", "less than", "exceeding", etc. are understood not to include the recited number; expressions such as "above", "below", "within", etc. are understood to include the recited number. In addition, in the description of the embodiments of this application, the meaning of "a plurality of" is two or more (including two). Similar expressions related to "multiple", such as "multiple groups", "multiple times", etc., are understood in the same way, unless otherwise specifically defined.

[0086] In the description of the embodiments of this application, the spatially related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiment or the drawing. It is only for the convenience of describing the specific embodiments of this application or for the reader's understanding, and does not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that one element is connected "to" or "under" another element, it can not only be directly connected "to" or "under" another element, but also be indirectly connected "to" or "under" another element through an intermediate element.

[0087] Unless otherwise clearly specified or defined, in the description of the embodiments of the present application, the terms "installed", "connected", "linked", "fixed", "set", etc. shall be understood in a broad sense. For example, the "connection" may be a fixed connection, a detachable connection, or an integral setting; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium; it may be the communication inside two components or the interaction relationship between two components. For those skilled in the art to which the present application pertains, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0088] Please refer to Figures 1 to 5 , this embodiment relates to a papermaking sewage recycling system, which is mainly used for recycling the sewage in the papermaking production workshop to save water resources. The papermaking sewage recycling system includes a collection pool 1, a sewage treatment mechanism, a reused water pool 9, and a water conveyance mechanism; the collection pool 1 is connected to the sewage treatment mechanism through a pipeline, and the collection pool 1 is used for collecting and storing the sewage in the production workshop; the sewage treatment mechanism is used for treating and purifying the sewage in the production workshop so as to meet the discharge standards, reduce environmental pollution, and improve environmental protection. The reused water pool 9 is connected to the sewage treatment mechanism through a pipeline, and the reused water pool 9 is used for recycling and storing the treated sewage. By recycling and storing the treated sewage in the reused water pool 9, water resources can be recycled and the waste of water resources can be avoided, thereby improving environmental protection. It should be noted that in this embodiment, the number of reused water pools 9 is not limited and may be one or more.

[0089] Specifically, in this embodiment, as Figures 1 to 5As shown, the sewage treatment mechanism includes a cooling water tank 11, a cooling tower 12, and a polyacrylamide drug dissolving tank; the cooling water tank 11 is connected to the recycled water tank 9 through a pipeline, the cooling water tank 11 is connected to the cooling tower 12 through a pipeline, and the cooling water tank 11 is used to supply water to the cooling tower 12; the polyacrylamide drug dissolving tank is connected to the recycled water tank 9 through a pipeline; the polyacrylamide drug dissolving tank is used to dissolve polyacrylamide. It should be noted that the role of polyacrylamide in sewage treatment is mainly reflected in enhancing sedimentation performance, enhancing filtration performance, reducing treatment costs, avoiding secondary pollution of sludge, and accelerating sediment-water separation. The water conveyance mechanism is used to convey the sewage in the recycled water tank 9 to the cooling water tank 11 and the polyacrylamide drug dissolving tank. By means of the water conveyance mechanism, the sewage in the recycled water tank 9 is conveyed to the cooling water tank 11 and the polyacrylamide drug dissolving tank for use by the cooling tower 12 and the polyacrylamide drug dissolving tank, so as to recycle the sewage, save water resources, reduce the use of fresh water, reduce costs, reduce sewage discharge, reduce environmental pollution, improve environmental protection, achieve energy conservation and emission reduction, and realize clean production. It should be noted that in this embodiment, the number of the cooling water tank 11 and the polyacrylamide drug dissolving tank is not limited and can be one or more.

[0090] Among them, in this embodiment, the cooling tower 12 uses water as a circulating coolant, and after the water comes into contact with air flow for heat exchange, it is a device for reducing water temperature. In sewage treatment, the cooling tower 12 is mainly used to reduce the heat generated during the sewage treatment process. For example, in the biological treatment process, microorganisms need an appropriate temperature range to effectively decompose organic matter. If the temperature is too high, the microbial activity will be inhibited, affecting the treatment effect. By using the cooling tower 12, the hot water can be cooled to an appropriate temperature, providing good environmental conditions to promote the growth and activity of microorganisms.

[0091] Specifically, in the paper-making sewage recycling system of this embodiment, the sewage generated in the paper-making production workshop is treated and purified by the sewage treatment mechanism to meet the discharge standards, reduce environmental pollution, and improve environmental protection. Then, all the treated sewage flows into the recycled water tank 9, and the treated sewage is recycled and stored through the recycled water tank 9, so that water resources can be recycled, avoiding waste of water resources and improving environmental protection. And through the water conveyance mechanism, the sewage in the recycled water tank 9 is conveyed to the cooling water tank 11 for use by the cooling tower 12, and the sewage in the recycled water tank 9 is conveyed to the polyacrylamide drug dissolving tank. The polyacrylamide is dissolved by the sewage in the recycled water tank 9, effectively recycling the sewage, saving water resources, reducing the use of fresh water, reducing costs, reducing sewage discharge, reducing environmental pollution, improving environmental protection, achieving energy conservation and emission reduction, and realizing clean production.

[0092] Optionally, in some embodiments, such as Figures 1 to 5As shown, the water conveyance mechanism includes a first water pump 19 and a second water pump 20; the first water pump 19 is arranged on the pipeline between the cooling water pool 11 and the recycled water pool 9, and the sewage in the recycled water pool 9 is conveyed into the cooling water pool 11 by the first water pump 19. The second water pump 20 is arranged on the pipeline between the polyacrylamide drug dissolving tank and the recycled water pool 9, and the sewage in the recycled water pool 9 is conveyed into the polyacrylamide drug dissolving tank by the second water pump 20 to dissolve the polyacrylamide.

[0093] Optionally, in some embodiments, as Figures 1 to 5 As shown, the water conveyance mechanism includes a first water pump 19, and the papermaking sewage recycling system further includes a first detection mechanism 15 and a control mechanism 25; the first water pump 19 is arranged on the pipeline between the cooling water pool 11 and the recycled water pool 9, and the first water pump 19 is electrically connected to the control mechanism 25; the sewage in the recycled water pool 9 is conveyed into the cooling water pool 11 by the first water pump 19. The first detection mechanism is arranged in the cooling water pool 11, the first detection mechanism 15 is electrically connected to the control mechanism 25, and the first detection mechanism 15 is used to detect the water level height of the cooling water pool 11; the control mechanism 25 is used to receive and feedback the detection signal of the first detection mechanism 15 and control the start or stop of the first water pump 19. Specifically, in this embodiment, the water level height of the cooling water pool 11 is monitored in real time by the first detection mechanism 15. When the water level height detected by the first detection mechanism 15 is lower than the preset value, the first detection mechanism 15 sends a signal to the control mechanism 25. After receiving the signal, the control mechanism 25 makes an identification and feedback, and controls the first water pump 19 to start, conveying the sewage in the recycled water pool 9 into the cooling water pool 11 to achieve automatic water replenishment. Among them, the control mechanism 25 is a DCS controller. The first detection mechanism 15 is a liquid level sensor. It should be noted that the size of the preset value in this embodiment can be determined according to the actual situation (such as: the size or height of the cooling water pool 11, etc.).

[0094] Optionally, in some embodiments, as Figures 1 to 5As shown, the water conveyance mechanism includes a second water pump 20. The papermaking sewage recycling system further includes a second detection mechanism 16 and a control mechanism 25. The second water pump 20 is disposed on the pipeline between the polyacrylamide drug dissolving tank and the recycled water tank 9. The second water pump 20 is electrically connected to the control mechanism 25. The sewage in the recycled water tank 9 is conveyed into the polyacrylamide drug dissolving tank through the second water pump 20 to dissolve polyacrylamide. The second detector is disposed in the polyacrylamide drug dissolving tank. The second detection mechanism 16 is electrically connected to the control mechanism 25. The second detection mechanism 16 is used to detect the water level height of the polyacrylamide drug dissolving tank. The control mechanism 25 is used to receive and feedback the detection signal of the second detection mechanism 16 and control the start or stop of the second water pump 20. Specifically, in this embodiment, the water level height of the polyacrylamide drug dissolving tank is monitored in real time by the second detection mechanism 16. When the water level height detected by the second detection mechanism 16 is lower than the preset value, the second detection mechanism 16 sends a signal to the control mechanism 25. After receiving the signal, the control mechanism 25 makes an identification and feedback, and controls the second water pump 20 to start, conveying the sewage in the recycled water tank 9 into the polyacrylamide drug dissolving tank to achieve automatic water replenishment. The control mechanism 25 is a DCS controller. The second detection mechanism 16 is a liquid level sensor. It should be noted that the size of the preset value in this embodiment can be determined according to the actual situation (such as: the size or height of the polyacrylamide drug dissolving tank, etc.).

[0095] Optionally, in some embodiments, such as Figures 1 to 5 As shown, the recycled water tank 9 is connected to the main pipe of the fire pipeline 14 in the production workshop through a pipeline. The water conveyance mechanism is further used to convey the treated sewage in the recycled water tank 9 to the fire pipeline 14. By using the sewage in the recycled water tank 9 for the fire pipeline 14 in the fire protection field, fire extinguishing can be carried out, effectively recycling the sewage, saving water resources, reducing the use of fresh water, reducing costs, reducing the sewage discharge volume, reducing environmental pollution, improving environmental protection, achieving energy conservation and emission reduction, and clean production.

[0096] Optionally, in some embodiments, such as Figures 1 to 5As shown, the water conveyance mechanism includes a third water pump 21. The paper-making sewage recycling system further includes a third detection mechanism 17 and a control mechanism 25. The third water pump 21 is disposed on the pipeline between the reclaimed water tank 9 and the main pipe of the fire pipeline 14. The third water pump 21 is electrically connected to the control mechanism 25. The sewage in the reclaimed water tank 9 is conveyed into the fire pipeline 14 through the third water pump 21, saving water resources. The third detection mechanism 17 is disposed on the main pipe of the fire pipeline 14. The third detection mechanism 17 is electrically connected to the control mechanism 25. The third detection mechanism 17 is used to detect the water pressure in the main pipe of the fire pipeline 14. The control mechanism 25 is used to receive and feedback the detection signal of the third detection mechanism 17 and control the start or stop of the third water pump 21. Specifically, in this embodiment, the water pressure in the main pipe of the fire pipeline 14 is monitored in real time by the third detection mechanism 17. When the water pressure detected by the third detection mechanism 17 is lower than the preset value, the third detection mechanism 17 sends a signal to the control mechanism 25. After receiving the signal, the control mechanism 25 identifies and feedbacks, and controls the third water pump 21 to start, conveying the sewage in the reclaimed water tank 9 into the fire pipeline 14 to achieve automatic water replenishment. The control mechanism 25 is a DCS controller. The third detection mechanism 17 is a pressure sensor. It should be noted that the preset value in this embodiment is 0.5 MPa.

[0097] Optionally, in some embodiments, such as Figures 1 to 5 As shown, the paper-making sewage recycling system further includes a spray pond 10 and a multi-disc thickener 2. The spray pond 10 is connected to the reclaimed water tank 9 through a pipeline. The water conveyance mechanism is further used to convey the sewage in the reclaimed water tank 9 to the spray pond 10. The spray pond 10 is connected to the multi-disc thickener 2 through a pipeline. The spray pond 10 is used to supply water to the disc thickener. The collecting tank 1 is connected to the multi-disc thickener 2 through a pipeline. The sewage in the reclaimed water tank 9 is conveyed to the spray pond 10 through the water conveyance mechanism for use by the multi-disc thickener 2, effectively recycling the sewage, saving water resources, reducing the use of fresh water, reducing costs, reducing the sewage discharge volume, reducing environmental pollution, improving environmental protection, achieving energy conservation and emission reduction, and clean production. The multi-disc thickener 2 in this embodiment is mainly used for dehydration treatment in sewage treatment. By increasing the number of discs, the production capacity is increased, the pulp concentration is increased, the solid loss is reduced, and it has the advantages of energy conservation and simple operation. The multi-disc thickener 2 is an efficient dehydration device, and its advantages include a large surface area, a small floor area, the production capacity can be increased by increasing the number of discs, and a high pulp concentration and less solid loss.

[0098] Optionally, in some embodiments, such as Figures 1 to 5As shown, the water conveyance mechanism includes a fourth water pump 22. The papermaking sewage recycling system further includes a fourth detection mechanism 18 and a control mechanism 25. The fourth water pump 22 is disposed on the pipeline between the spray pond 10 and the recycled water tank 9, and the fourth water pump 22 is electrically connected to the control mechanism 25. Among them, the sewage in the recycled water tank 9 is conveyed to the spray pond 10 through the fourth water pump 22 for use by the multi-disc concentrator 2. The fourth detection mechanism 18 is disposed in the spray pond 10, the fourth detection mechanism 18 is electrically connected to the control mechanism 25, and the fourth detection mechanism 18 is used to detect the water level height in the spray pond 10. The control mechanism 25 is used to receive and feedback the detection signal of the fourth detection mechanism 18 and control the start or stop of the fourth water pump 22. Specifically, in this embodiment, the water level height of the spray pond 10 is monitored in real time by the fourth detection mechanism 18. When the water level height detected by the fourth detection mechanism 18 is lower than the preset value, the fourth detection mechanism 18 sends a signal to the control mechanism 25. After receiving the signal, the control mechanism 25 makes an identification feedback and controls the fourth water pump 22 to start, conveying the sewage in the recycled water tank 9 into the spray pond 10 to achieve automatic water replenishment. Among them, the control mechanism 25 is a DCS controller. The fourth detection mechanism 18 is a liquid level sensor. It should be noted that the size of the preset value in this embodiment can be determined according to the actual situation (such as: the size or height of the spray pond 10, etc.).

[0099] Optionally, in some embodiments, such as Figures 1 to 5 As shown, the sewage treatment mechanism includes a primary sedimentation tank 3, an acidification tank 4, an anaerobic tower 5, an oxidation ditch 6, a secondary sedimentation tank 7, and a deep treatment tank group 8. The collecting tank 1 is connected to the cooling tower 12 through a pipeline, and the sewage in the collecting tank 1 can also be used by the cooling tower 12. The collecting tank 1 is connected to the multi-disc concentrator 2 through a pipeline, and the sewage in the collecting tank 1 can also be used by the multi-disc concentrator 2. The multi-disc concentrator 2 is connected to the primary sedimentation tank 3 through a pipeline, and the cooling tower 12 is connected to the primary sedimentation tank 3 through a pipeline. The primary sedimentation tank 3 is connected to the acidification tank 4 through a pipeline, the anaerobic tower 5 is connected to the acidification tank 4 through a pipeline, the oxidation ditch 6 is connected to the anaerobic tower 5 through a pipeline, the secondary sedimentation tank 7 is connected to the oxidation ditch 6 through a pipeline, the deep treatment tank group 8 is connected to the secondary sedimentation tank 7 through a pipeline, and the recycled water tank 9 is connected to the deep treatment tank group 8 through a pipeline. The polyacrylamide dissolving tank is connected to the deep treatment tank group 8 through a pipeline. After polyacrylamide is dissolved in the polyacrylamide dissolving tank, it flows into the treatment tank group for deep treatment to further treat and purify the sewage. Specifically, as Figure 4As shown in the figure, the advanced treatment pond group 8 includes a coagulation reaction pond 81, a coagulation sedimentation pond 82, a Fenton reaction pond 83, and a Fenton sedimentation pond 84. Among them, the coagulation reaction pond 81, the coagulation sedimentation pond 82, the Fenton reaction pond 83, and the Fenton sedimentation pond 84 are connected in sequence through pipelines. The polyacrylamide drug dissolving pond flows into the coagulation reaction pond 81, the coagulation sedimentation pond 82, the Fenton reaction pond 83, and the Fenton sedimentation pond 84 respectively through pipelines. It should be noted that the structure of the sewage treatment mechanism in this embodiment is not limited to this. Those skilled in the art can select other suitable sewage treatment mechanisms according to the teachings of this embodiment.

[0100] Optionally, in some embodiments, as Figure 3 shown, the paper-making sewage recycling system further includes a first connecting pipeline 24 and a fifth water pump 23. One end of the first connecting pipeline 24 is connected to the acidification pond 4, and the other end of the first connecting pipeline 24 is connected to the oxidation ditch 6. The fifth water pump 23 is arranged on the first connecting pipeline 24, and the fifth water pump 23 is used to directly transport the sewage in the acidification pond 4 into the oxidation ditch 6. Specifically, when the nitrogen content of the sewage in the recycled water pond 9 exceeds the preset value standard, the fifth water pump 23 is started, and the sewage in the acidification pond 4 is directly transported into the oxidation ditch 6 through the first connecting pipeline 24 by the fifth water pump 23. Since the wastewater in the acidification pond 4 is decomposed by microorganisms into sugars, fatty acids, and amino acids, the sugars decomposed in the acidification pond 4 are used to replace the carbon source to supplement and balance the carbon-nitrogen ratio of the oxidation ditch 6, so as to ensure the best carbon-nitrogen ratio of the oxidation ditch 6, improve the denitrification efficiency of the oxidation ditch 6, reduce the addition of organic matter into the oxidation ditch 6, reduce the drug consumption, reduce the cost, reduce the number of surface aerators turned on, and reduce the energy consumption. According to actual feedback, the organic matter addition cost is reduced by 0.5 yuan per ton of water; the power consumption is reduced by 0.1 yuan per ton of water. It should be noted that the preset value of the nitrogen content of the wastewater can be adjusted and set according to the actual situation. In this embodiment, the preset value of the nitrogen content of the wastewater is 5 mg / L. It should be noted that in this embodiment, when the nitrogen content exceeds the preset value, the fifth water pump 23 pumps about 10% of the sewage in the acidification pond 4 directly into the oxidation ditch 6, and the remaining 90% of the sewage in the acidification pond 4 flows into the anaerobic tower 5. The proportion of the extracted sewage can be adjusted according to the actual situation. The nitrogen content of the sewage in the recycled water pond 9 can be detected by an ammonia nitrogen detector.

[0101] Finally, it should be noted that although the above embodiments have been described in the text and drawings of the specification of this application, the patent protection scope of this application cannot be limited thereby. Any equivalent structure or equivalent process substitution or modification generated by using the content recorded in the text and drawings of the specification of this application based on the essential concept of this application, as well as the technical solutions of the above embodiments directly or indirectly implemented in other related technical fields, etc., are all included in the patent protection scope of this application.

Claims

1. A papermaking wastewater recycling system, characterized by: It includes water collection tanks, sewage treatment facilities, water recycling tanks and water delivery facilities; The water collection tank is connected to the sewage treatment mechanism through a pipeline. The water collection tank is used to collect and store sewage from the production workshop; the sewage treatment mechanism is used to treat and purify the sewage from the production workshop so that it can meet the discharge standards; The reuse water pool is connected to the sewage treatment mechanism through a pipeline, and the reuse water pool is used to recycle and store the treated sewage; The sewage treatment mechanism includes a cooling water pool, a cooling tower and a polyacrylamide dissolving pool; The cooling water pool is connected to the reuse water pool through a pipeline, and the cooling water pool is connected to the cooling tower through a pipeline, and the cooling water pool is used to supply water to the cooling tower; The polyacrylamide dissolving tank is connected to the recycled water tank through a pipeline; The water delivery mechanism is used to deliver the sewage in the reuse water pool to the cooling water pool and the polyacrylamide dissolving pool.

2. The papermaking wastewater recycling system according to claim 1, characterized in that: The water delivery mechanism includes a first water pump and a second water pump; The first water pump is arranged on the pipeline between the cooling water pool and the recycling water pool; The second water pump is arranged on the pipeline between the polyacrylamide dissolving tank and the recycled water tank.

3. The papermaking wastewater recycling system according to claim 1 is characterized in that: The water delivery mechanism includes a first water pump, and the papermaking wastewater recycling system also includes a first detection mechanism and a control mechanism; The first water pump is arranged on the pipeline between the cooling water pool and the reuse water pool, and the first water pump is electrically connected to the control mechanism; The first detection mechanism is arranged in the cooling water pool, the first detection mechanism is electrically connected to the control mechanism, and the first detection mechanism is used to detect the water level of the cooling water pool; The control mechanism is used to receive the detection signal fed back from the first detection mechanism and control the start or stop of the first water pump.

4. The papermaking wastewater recycling system according to claim 1 or 3, characterized in that: The water delivery mechanism includes a second water pump, and the papermaking wastewater recycling system also includes a second detection mechanism and a control mechanism; The second water pump is arranged on a pipeline between the polyacrylamide dissolving tank and the recycled water tank, and the second water pump is electrically connected to the control mechanism; The second detection mechanism is arranged in the polyacrylamide dissolving tank, the second detection mechanism is electrically connected to the control mechanism, and the second detection mechanism is used to detect the water level of the polyacrylamide dissolving tank; The control mechanism is used to receive the detection signal fed back from the second detection mechanism and control the start or shut down of the second water pump.

5. The papermaking wastewater recycling system according to any one of claims 1 to 3, characterized in that: The reuse water pool is connected to the main pipe of the fire-fighting pipeline in the production workshop through a pipeline, and the water delivery mechanism is also used to deliver the treated sewage in the reuse water pool to the fire-fighting pipeline.

6. The papermaking wastewater recycling system according to claim 5, characterized in that: The water delivery mechanism includes a third water pump, and the papermaking wastewater recycling system also includes a third detection mechanism and a control mechanism; The third water pump is arranged on the pipeline between the reuse water tank and the main pipe of the fire-fighting pipeline, and the third water pump is electrically connected to the control mechanism; The third detection mechanism is arranged on the main pipe of the fire-fighting pipeline, the third detection mechanism is electrically connected to the control mechanism, and the third detection mechanism is used to detect the water pressure in the main pipe of the fire-fighting pipeline; The control mechanism is used to receive the detection signal fed back from the third detection mechanism and control the start or shut down of the third water pump.

7. The papermaking wastewater recycling system according to any one of claims 1 to 3, characterized in that: The papermaking wastewater recycling system also includes a spray water pool and a multi-disc thickener, wherein the spray water pool is connected to the reuse water pool via a pipeline, and the water delivery mechanism is also used to deliver the wastewater in the reuse water pool to the spray water pool, wherein the spray water pool is connected to the multi-disc thickener via a pipeline, and the spray water pool is used to supply water to the disc thickener; The water collection tank is connected to the multi-disc concentrator through a pipeline.

8. The papermaking wastewater recycling system according to claim 7, characterized in that: The water delivery mechanism includes a fourth water pump, and the papermaking wastewater recycling system also includes a fourth detection mechanism and a control mechanism; The fourth water pump is arranged on the pipeline between the spray water pool and the reuse water pool, and the fourth water pump is electrically connected to the control mechanism; The fourth detection mechanism is arranged in the spray water pool, the fourth detection mechanism is electrically connected to the control mechanism, and the fourth detection mechanism is used to detect the water level in the spray water pool; The control mechanism is used to receive the detection signal fed back from the fourth detection mechanism and control the start or shut down of the fourth water pump.

9. The papermaking wastewater recycling system according to claim 7, characterized in that: The sewage treatment mechanism includes a primary sedimentation tank, an acidification tank, an anaerobic tower, an oxidation ditch, a secondary sedimentation tank and a deep treatment tank group; The water collection tank is connected to the cooling tower via a pipeline; The multi-disc thickener is connected to the primary sedimentation tank via a pipeline, and the cooling tower is connected to the primary sedimentation tank via a pipeline; The primary sedimentation tank is connected to the acidification tank through a pipeline, the anaerobic tower is connected to the acidification tank through a pipeline, the oxidation ditch is connected to the anaerobic tower through a pipeline, the secondary sedimentation tank is connected to the oxidation ditch through a pipeline, the deep treatment tank group is connected to the secondary sedimentation tank through a pipeline, and the recycled water tank is connected to the deep treatment tank group through a pipeline; The polyacrylamide dissolving tank is connected with the deep treatment tank group through a pipeline.

10. The papermaking wastewater recycling system according to claim 9, characterized in that: The papermaking wastewater recycling system further comprises a first connecting pipeline and a fifth water pump, one end of the first connecting pipeline is connected to the acidification tank, and the other end of the first connecting pipeline is connected to the oxidation ditch; The fifth water pump is arranged on the first connecting pipeline, and the fifth water pump is used to directly transport the sewage in the acidification tank to the oxidation ditch.

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