Advanced treatment system for papermaking wastewater

Abstract

The utility model relates to a papermaking wastewater advanced treatment system which comprises a primary treatment mechanism and a flocculation and sedimentation tank which are connected through a pipeline; the first chemical adding mechanism is connected with the flocculation and sedimentation tank through a pipeline, and the first chemical adding mechanism is used for adding a chemical into the flocculation and sedimentation tank, so that the wastewater in the flocculation and sedimentation tank is subjected to flocculation and sedimentation; the first sedimentation tank is connected with the flocculation sedimentation tank through a pipeline; the Fenton reaction tank is connected with the first sedimentation tank through a pipeline; the degassing tank is connected with the Fenton reaction tank through a pipeline; the final sedimentation tank is connected with the degassing tank through a pipeline; the first sedimentation tank is connected with the physicochemical sludge concentration tank through a pipeline, and the final sedimentation tank is connected with the physicochemical sludge concentration tank through a pipeline.

Description

Technical Field

[0001] The utility model relates to the technical field of papermaking wastewater treatment, in particular to a papermaking wastewater deep treatment system. Background Art

[0002] Papermaking often uses waste paper, straw, and wood pulp as raw materials. Pulping and papermaking generally consists of pulping, washing, bleaching, and papermaking. Industrial pulping methods include alkaline pulping, chemical-mechanical pulping, and mechanical pulping. Papermaking generates wastewater, which, if discharged directly, pollutes the environment and is detrimental to the environment.

[0003] Papermaking wastewater has high COD concentrations and low biodegradability, making deep treatment a crucial step in wastewater treatment. Traditional deep treatment methods primarily rely on the Fenton reaction, where Fenton reagents (ferrous sulfate, hydrogen peroxide) are added to the Fenton reaction tank. This treatment method has the following issues: high chromaticity and high COD concentration in the wastewater, which are not environmentally friendly. Utility Model Content

[0004] To this end, it is necessary to provide a papermaking wastewater deep treatment system to solve the technical problem that the traditional deep treatment method is mainly through the Fenton treatment method, which results in high chromaticity of the wastewater effluent and high COD concentration in the water, which is not conducive to environmental protection.

[0005] To achieve the above objectives, the inventors provide a papermaking wastewater deep treatment system, comprising:

[0006] A preliminary treatment mechanism, wherein the preliminary treatment mechanism is used to perform preliminary treatment on wastewater from the papermaking workshop;

[0007] a flocculation sedimentation tank, wherein the flocculation sedimentation tank is connected to the preliminary treatment mechanism via a pipeline;

[0008] a first dosing mechanism, the first dosing mechanism being connected to the flocculation sedimentation tank via a pipeline, and the first dosing mechanism being used to add a reagent to the flocculation sedimentation tank to cause flocculation and sedimentation of the wastewater in the flocculation sedimentation tank;

[0009] a first sedimentation tank, wherein the first sedimentation tank is connected to the flocculation sedimentation tank via a pipeline;

[0010] A Fenton reaction tank, wherein the Fenton reaction tank is connected to the first sedimentation tank via a pipeline;

[0011] A degassing tank, wherein the degassing tank is connected to the Fenton reaction tank via a pipeline;

[0012] A final settling tank, wherein the final settling tank is connected to the degassing tank via a pipeline;

[0013] The physicochemical sludge thickening tank is connected to the first sedimentation tank through a pipeline, and the final sedimentation tank is connected to the physicochemical sludge thickening tank through a pipeline.

[0014] As a preferred structure of the present utility model, the first dosing mechanism includes a first dosing box, a second dosing box and a third dosing box. The first dosing box is connected to the flocculation sedimentation tank through a pipeline, the second dosing box is connected to the flocculation sedimentation tank through a pipeline, and the third dosing box is connected to the flocculation sedimentation tank through a pipeline.

[0015] As a preferred structure of the present invention, the papermaking wastewater deep treatment system further includes a first detection mechanism, a metering pump and a control mechanism, wherein the first detection mechanism is arranged in the flocculation sedimentation tank, and the first detection mechanism is used to detect the pH value of the wastewater in the flocculation sedimentation tank;

[0016] The metering pump is arranged on the pipeline between the second dosing tank and the flocculation sedimentation tank;

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

[0018] As a preferred structure of the present invention, the papermaking wastewater deep treatment system further includes a second dosing mechanism and a third dosing mechanism;

[0019] The second dosing mechanism is connected to the Fenton reaction tank via a pipeline, and the second dosing mechanism is used to add reagents to the Fenton reaction tank;

[0020] The third dosing mechanism is connected to the degassing tank via a pipeline, and the third dosing mechanism is used to add reagents to the degassing tank.

[0021] As a preferred structure of the present invention, the preliminary treatment mechanism includes a water collection tank, a primary sedimentation tank, an acidification tank, an anaerobic tower, an oxidation ditch and a secondary sedimentation tank;

[0022] The primary sedimentation tank is connected to the water collection tank via a pipeline;

[0023] The acidification tank is connected to the primary sedimentation tank via a pipeline;

[0024] The anaerobic tower is connected to the acidification tank via a pipeline;

[0025] The oxidation ditch is connected to the anaerobic tower via a pipeline;

[0026] The secondary sedimentation tank is connected to the oxidation channel through a pipeline;

[0027] The flocculation sedimentation tank is connected to the secondary sedimentation tank through a pipeline.

[0028] As a preferred structure of the present invention, the papermaking wastewater deep treatment system further includes a first connecting pipeline and a first 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;

[0029] The first water pump is arranged on the first connecting pipeline, and the first water pump is used to directly transport the sewage in the acidification tank to the oxidation ditch.

[0030] As a preferred structure of the present invention, the papermaking wastewater deep treatment system further includes a reuse water tank, and the reuse water tank is connected to the final sedimentation tank through a pipeline.

[0031] As a preferred structure of the present invention, the papermaking wastewater deep treatment system also includes a second water pump. The reuse water tank is connected to the first dosing mechanism through a pipeline. The second water pump is arranged on the pipeline between the reuse water tank and the first dosing mechanism.

[0032] As a preferred structure of the present invention, the papermaking wastewater deep treatment system further includes a third water pump, a second detection mechanism and a control mechanism;

[0033] The recycled water pool is connected to the main pipe of the fire protection pipeline in the production workshop through a pipeline;

[0034] The third water pump is arranged on the pipeline between the reuse water tank and the main pipe of the fire protection pipeline, and the third water pump is electrically connected to the control mechanism;

[0035] The second detection mechanism is provided on the main pipe of the fire protection pipeline, the second detection mechanism is electrically connected to the control mechanism, and the second detection mechanism is used to detect the water pressure in the main pipe of the fire protection pipeline;

[0036] The control mechanism is used to receive the detection signal fed back from the second detection mechanism and control the start or stop of the third water pump.

[0037] As a preferred structure of the present invention, the papermaking wastewater deep treatment system further includes a reuse water tank, a fourth water pump and a fifth water pump, and the reuse water tank is connected to the final sedimentation tank through a pipeline;

[0038] The reuse water tank is connected to the second dosing mechanism through a pipeline, and the fourth water pump is arranged on the pipeline between the reuse water tank and the second dosing mechanism;

[0039] The reuse water tank is connected to the third dosing mechanism through a pipeline, and the fifth water pump is arranged on the pipeline between the reuse water tank and the third dosing mechanism.

[0040] Different from the existing technology, the beneficial effects of the above technical solution are as follows: the papermaking wastewater deep treatment system of the utility model adds the reagent to the flocculation sedimentation tank for reaction through the first dosing mechanism, and after the reaction, flocculation and sedimentation are first carried out in the first sedimentation tank. The sludge after precipitation is sent to the physicochemical sludge thickening tank for treatment, and then reacted through the Fenton reaction tank. After the reaction, precipitation is carried out again in the final sedimentation tank, and the sludge after precipitation is sent to the physicochemical sludge thickening tank for treatment, wherein the reaction and precipitation are carried out in two steps, effectively adsorbing and precipitating, removing impurities and organic matter in the wastewater, effectively reducing the COD concentration in the wastewater, improving the COD removal rate, reducing the effluent chromaticity of the wastewater, and improving environmental protection.

[0041] The above-mentioned records related to the content of the utility model are only an overview of the technical solution of this application. In order to enable ordinary technicians in this field to understand the technical solution of this application more clearly, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purposes and other purposes, features and advantages of this application easier to understand, the following is an explanation in combination with the specific implementation methods and drawings of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of this application and other related contents, and are not to be considered as limiting this application.

[0043] In the drawings of the specification:

[0044] Figure 1 This is one of the flow diagrams of the papermaking wastewater deep treatment system described in the specific implementation method;

[0045] Figure 2 This is the second flow diagram of the papermaking wastewater deep treatment system described in the specific implementation method;

[0046] Figure 3 This is the third flow diagram of the papermaking wastewater deep treatment system according to the specific embodiment;

[0047] Figure 4 This is the fourth flow diagram of the papermaking wastewater deep treatment system according to the specific embodiment;

[0048] Figure 5 The circuit connection diagram of the papermaking wastewater deep treatment system according to the specific embodiment is as follows: 100, preliminary treatment mechanism,

[0049] 1. Catchment pool,

[0050] 2. Primary sedimentation tank,

[0051] 3. Acidification pool,

[0052] 4. Anaerobic tower,

[0053] 5. Oxidation ditch,

[0054] 6. Secondary sedimentation tank,

[0055] 7. The first connecting pipeline,

[0056] 8. The first water pump,

[0057] 9. Flocculation sedimentation tank,

[0058] 10. The first dosing mechanism,

[0059] 101. First medicine box,

[0060] 102. Second medicine box,

[0061] 103. The third medicine box,

[0062] 11. The first sedimentation tank,

[0063] 12. Fenton reaction pool,

[0064] 13. Degassing tank,

[0065] 14. Final sedimentation tank,

[0066] 15. Recycling pool,

[0067] 16. The second dosing mechanism,

[0068] 17. The third dosing mechanism,

[0069] 18. The first testing agency,

[0070] 19. Metering pump,

[0071] 20. Control agency,

[0072] 21. Second water pump,

[0073] 22. The third water pump,

[0074] 23. Fire protection pipelines,

[0075] 24. Second testing agency,

[0076] 25. The fourth water pump,

[0077] 26. The fifth water pump,

[0078] 27. Physicochemical sludge thickening tank. DETAILED DESCRIPTION

[0079] In order to explain in detail the possible application scenarios, technical principles, specific solutions that can be implemented, and the purpose and effects of this application, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application and are therefore only examples and are not intended to limit the scope of protection of this application.

[0080] References to "embodiments" herein mean that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the word "embodiment" in various places 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 are no technical contradictions or conflicts, the various technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution.

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

[0082] In the description of this application, the term "and / or" is used to describe a logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and both A and B exist. In addition, the character " / " in this document generally indicates that the objects before and after are in a logical "or" relationship.

[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 quantity, priority or sequence relationship between these entities or operations.

[0084] Without further limitations, in this application, the words "include", "comprise", "have" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those defined elements, but also other elements not explicitly listed, or elements inherent to such process, method or product.

[0085] Consistent with the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceed" are understood to exclude the number itself; expressions such as "above," "below," and "within" are understood to include the number itself. Furthermore, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this manner, such as "multiple groups," "multiple times," etc., unless otherwise specifically defined.

[0086] In the description of the embodiments of the present application, the space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do 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, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "on" or "under", it can not only be directly connected to the other element "on" or "under", but also be indirectly connected to the other element "on" or "under" through an intermediate element.

[0087] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms "installed", "connected", "connected", "fixed", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art of the present application, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0088] See also Figures 1 to 5 This embodiment relates to a papermaking wastewater deep treatment system, comprising:

[0089] The preliminary treatment mechanism 100 is used to perform preliminary and purification treatment on wastewater from the papermaking workshop to improve environmental protection.

[0090] A flocculation sedimentation tank 9, wherein the flocculation sedimentation tank 9 is connected to the preliminary treatment mechanism 100 via a pipeline;

[0091] A first dosing mechanism 10 is connected to the flocculation sedimentation tank 9 via a pipeline. The first dosing mechanism 10 is used to add a reagent to the flocculation sedimentation tank 9 to cause the wastewater in the flocculation sedimentation tank 9 to flocculate and precipitate, thereby effectively adsorbing and precipitating, removing impurities and organic matter in the wastewater, effectively reducing the COD content in the wastewater, improving the COD removal rate, reducing the chromaticity of the wastewater outlet, and improving environmental protection. The reagents in this embodiment include sulfuric acid, a super-efficient water purifier, and polyacrylamide, wherein sulfuric acid, the super-efficient water purifier, and polyacrylamide are added to the flocculation sedimentation tank 9 in sequence.

[0092] A first sedimentation tank 11, which is connected to the flocculation sedimentation tank 9 via a pipeline;

[0093] The Fenton reaction tank 12 is connected to the first sedimentation tank 11 through a pipeline; wherein the supernatant of the first sedimentation tank 11 flows into the Fenton reaction tank 12.

[0094] The degassing tank 13 is connected to the Fenton reaction tank 12 through a pipeline; the main function of the degassing tank 13 is to release the gas dissolved in the wastewater and the bubbles adhering to the flocs in the wastewater.

[0095] The final sedimentation tank 14 is connected to the degassing tank 13 through a pipeline; it should be noted that the first sedimentation tank 11, the Fenton reaction tank 12, the degassing tank 13 and the final sedimentation tank 14 can also be connected through the tank body, and the sewage flows to the next process through the height difference between the tank bodies.

[0096] The physicochemical sludge thickening tank 27 is connected to the first sedimentation tank 11 and the final sedimentation tank 14 via a pipeline. The physicochemical sludge thickening tank 27 is a device that treats sludge with chemicals to cause a redox reaction, accelerating water evaporation and the aggregation of sludge particles, thereby achieving sludge concentration. The physicochemical sludge thickening tank 27 works by mixing sludge with chemicals and allowing them to react under certain conditions, thereby evaporating water from the sludge and agglomerating sludge particles, achieving concentration.

[0097] Specifically, in the papermaking wastewater deep treatment system of this embodiment, the reagent is added to the flocculation sedimentation tank 9 through the first dosing mechanism 10 for reaction. After the reaction, flocculation and sedimentation are first carried out in the first sedimentation tank 11. The sludge after precipitation is sent to the physical and chemical sludge concentration tank 27 for treatment, and then reacted by the Fenton reaction tank 12. After the reaction, precipitation is carried out again in the final sedimentation tank 14. The sludge after precipitation is sent to the physical and chemical sludge concentration tank 27 for treatment, wherein the reaction and precipitation are carried out in two steps, effectively adsorbing and precipitating, removing impurities and organic matter in the wastewater, effectively reducing the COD in the wastewater, improving the COD removal rate, reducing the effluent chromaticity of the wastewater, and improving environmental protection. In this embodiment, COD is chemical oxygen demand

[0098] Optionally, in some embodiments, Figures 1 to 5 As shown, the first dosing mechanism 10 includes a first dosing box 101, a second dosing box 102, and a third dosing box 103. The first dosing box 101 is connected to the flocculation sedimentation tank 9 via a pipeline, the second dosing box 102 is connected to the flocculation sedimentation tank 9 via a pipeline, and the third dosing box 103 is connected to the flocculation sedimentation tank 9 via a pipeline. The first dosing box 101 is used to hold sulfuric acid, the second dosing box 102 is used to hold super-efficient water purifier, wherein the main components of the super-efficient water purifier are ferric sulfate, ferrous sulfate, aluminum sulfate, potassium permanganate, sulfuric acid, etc.; wherein the super-efficient water purifier can effectively adsorb and precipitate, and remove impurities, organic matter, and other substances in the wastewater; wherein the third dosing box 103 is used to hold polyacrylamide, wherein the role of polyacrylamide in wastewater treatment is mainly reflected in enhancing precipitation performance, enhancing filtration performance, reducing treatment costs, avoiding secondary pollution of sludge, and accelerating mud-water separation. It should be noted that the structure of the first dosing mechanism 10 of this embodiment is not limited thereto, and those skilled in the art may select other appropriate first dosing mechanisms 10 according to the teachings of this embodiment.

[0099] Optionally, in some embodiments, Figures 1 to 5As shown, the papermaking wastewater deep treatment system also includes a first detection mechanism 18, a metering pump 19 and a control mechanism 20. The first detection mechanism 18 is arranged in the flocculation sedimentation tank 9, and the first detection mechanism 18 is used to detect the pH value of the wastewater in the flocculation sedimentation tank 9; the metering pump 19 is arranged on the pipeline between the second dosing tank 102 and the flocculation sedimentation tank 9; the first detection mechanism 18 is electrically connected to the control mechanism 20, and the metering pump 19 is electrically connected to the control mechanism 20. The control mechanism 20 is used to receive the detection signal of the first detection mechanism 18 and control the start or shut down of the metering pump 19. Specifically, in this embodiment, the pH value of the wastewater in the flocculation sedimentation tank 9 is detected in real time by the first detection mechanism 18. When the detection mechanism detects that the pH value of the wastewater in the flocculation sedimentation tank 9 is within a preset range, the detection mechanism sends a detection signal to the control mechanism 20. After the control mechanism 20 receives the detection signal, the control mechanism 20 controls the metering pump 19 to start, and adds the reagent in the second dosing box 102 to the flocculation sedimentation tank 9, so that the reagent in the second dosing box 102 is automatically added to the flocculation sedimentation tank 9, thereby improving the efficiency of adsorption and polymerization of organic matter. The preset range of the pH value can be set according to actual conditions. In this embodiment, the preset range of the pH value is pH 4 to 6. The first detection mechanism 18 is a pH detector, and the control mechanism is a DCS controller.

[0100] Optionally, in some embodiments, Figures 1 to 5 As shown, the papermaking wastewater deep treatment system also includes a second dosing mechanism 16 and a third dosing mechanism 17; the second dosing mechanism 16 is connected to the Fenton reaction tank 12 via a pipeline, and the second dosing mechanism 16 is used to add reagents to the Fenton reaction tank 12; the third dosing mechanism 17 is connected to the degassing tank 13 via a pipeline, and the third dosing mechanism 17 is used to add reagents to the degassing tank 13. The second dosing mechanism 16 is used to hold ferrous sulfate and hydrogen peroxide, that is, ferrous sulfate and hydrogen peroxide reagents are placed in two medicine boxes respectively, and ferrous sulfate and hydrogen peroxide are added to the Fenton reaction tank 12 in turn. The third dosing mechanism 17 is used to hold polyacrylamide reagent. The role of polyacrylamide in wastewater treatment is mainly reflected in enhancing precipitation performance, enhancing filtration performance, reducing treatment costs, avoiding secondary pollution of sludge, and accelerating mud-water separation.

[0101] Optionally, in some embodiments, Figures 1 to 5As shown, the preliminary treatment mechanism 100 includes a water collection tank 1, a primary sedimentation tank 2, an acidification tank 3, an anaerobic tower 4, an oxidation ditch 5 and a secondary sedimentation tank 6; the primary sedimentation tank 2 is connected to the water collection tank 1 through a pipeline; the acidification tank 3 is connected to the primary sedimentation tank 2 through a pipeline; the anaerobic tower 4 is connected to the acidification tank 3 through a pipeline; the oxidation ditch 5 is connected to the anaerobic tower 4 through a pipeline; the secondary sedimentation tank 6 is connected to the oxidation ditch 5 through a pipeline; the flocculation sedimentation tank 9 is connected to the secondary sedimentation tank 6 through a pipeline.

[0102] Optionally, in some embodiments, Figures 1 to 5 As shown, the papermaking wastewater advanced treatment system further includes a first connecting pipe 7 and a first water pump 8. One end of the first connecting pipe 7 is connected to the acidification tank 3, and the other end of the first connecting pipe 7 is connected to the oxidation ditch 5. The first water pump 8 is disposed on the first connecting pipe 7 and is used to directly transport the sewage in the acidification tank 3 to the oxidation ditch 5. Specifically, when the nitrogen content of the sewage in the reuse water tank 15 exceeds a preset value, the first water pump 8 is activated to directly transport the wastewater in the acidification tank 3 to the oxidation ditch 5 through the first connecting pipe 7. Since the wastewater in the acidification tank 3 is decomposed into sugars, fatty acids, and amino acids by microorganisms, the sugars decomposed in the acidification tank 3 are used as a carbon source to supplement and balance the carbon-nitrogen ratio in the oxidation ditch 5, thereby ensuring that the optimal carbon-nitrogen ratio is achieved in the oxidation ditch 5, improving the denitrification efficiency of the oxidation ditch 5, reducing the addition of organic matter into the oxidation ditch 5, reducing drug consumption, reducing costs, reducing the number of surface aerators activated, and reducing energy consumption. According to actual feedback, the cost of adding organic matter has been reduced by 0.5 yuan per ton of water, and electricity consumption has been reduced by 0.1 yuan per ton of water. It should be noted that the preset value for the nitrogen content of the wastewater can be adjusted based on actual conditions. In this embodiment, the preset value for 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 first water pump 8 extracts approximately 10% of the wastewater from the acidification tank 3 and directly transfers it to the oxidation ditch 5. The remaining 90% of the wastewater in the acidification tank 3 flows into the anaerobic tower 4. The proportion of wastewater extracted can be adjusted based on actual conditions. An ammonia nitrogen detector can be used to detect the nitrogen content of the wastewater in the reuse water tank 15.

[0103] Optionally, in some embodiments, Figures 1 to 5 As shown, the papermaking wastewater advanced treatment system further includes a recycling water tank 15, which is connected to the final sedimentation tank 14 via a pipeline. The recycled water tank 15 recycles and stores the treated wastewater, allowing water resources to be recycled and reused, avoiding water waste and improving environmental protection.

[0104] Optionally, in some embodiments, Figures 1 to 5As shown, the papermaking wastewater advanced treatment system further includes a second water pump 21. The reuse water tank 15 is connected to the first dosing mechanism 10 via a pipeline, and the second water pump 21 is disposed on the pipeline between the reuse water tank and the first dosing mechanism 10. By reusing the water in the reuse water tank 15 to the first dosing mechanism 10, the wastewater is recycled, water resources are conserved, the use of clean water is reduced, costs are lowered, wastewater discharge is reduced, environmental pollution is reduced, environmental protection is improved, and energy conservation, emission reduction, and clean production are achieved.

[0105] Optionally, in some embodiments, Figures 1 to 5 As shown, the papermaking wastewater advanced treatment system also includes a third water pump 22, a second detection mechanism 24, and a control mechanism 20. The reuse water tank 15 is connected to the main pipe of the fire protection pipeline 23 in the production workshop via a pipeline. The third water pump 22 is installed in the pipeline between the reuse water tank 15 and the main pipe of the fire protection pipeline 23 and is electrically connected to the control mechanism 20. The second detection mechanism 24 is installed on the main pipe of the fire protection pipeline 23 and is electrically connected to the control mechanism 20. The second detection mechanism 24 is used to detect the water pressure in the main pipe of the fire protection pipeline 23. The control mechanism 20 is used to receive and feedback the detection signal from the second detection mechanism 24 and control the activation or deactivation of the third water pump 22. By using the wastewater in the reuse water tank 15 in the fire protection pipeline 23 for fire fighting, wastewater is effectively recycled, water resources are saved, the use of clean water is reduced, costs are reduced, wastewater discharge is reduced, environmental pollution is reduced, environmental protection is improved, and energy conservation, emission reduction, and clean production are achieved.

[0106] Specifically, in this embodiment, the water pressure in the main pipe of the fire protection line 23 is monitored in real time by a second detection mechanism 24. When the water pressure detected by the second detection mechanism 24 falls below a preset value, the second detection mechanism 24 sends a signal to the control mechanism 20. Upon receiving the signal, the control mechanism 20 identifies the signal and provides feedback, activating the third water pump 22 to transfer wastewater from the reuse water tank 15 to the fire protection line 23, achieving automatic water replenishment. The control mechanism 20 is a DCS controller. The second detection mechanism 24 is a pressure sensor. It should be noted that in this embodiment, the preset value is 0.5 MPa.

[0107] Optionally, in some embodiments, Figures 1 to 5As shown, the papermaking wastewater deep treatment system further includes a reuse water tank 15, a fourth water pump 25 and a fifth water pump 26. The reuse water tank 15 is connected to the final sedimentation tank 14 through a pipeline; the reuse water tank 15 is connected to the second dosing mechanism 16 through a pipeline, and the fourth water pump 25 is arranged on the pipeline between the reuse water tank 15 and the second dosing mechanism 16; the reuse water tank 15 is connected to the third dosing mechanism 17 through a pipeline, and the fifth water pump 26 is arranged on the pipeline between the reuse water tank 15 and the third dosing mechanism 17. By recycling the water in the reuse water tank 15 to the second dosing mechanism 16 and the third dosing mechanism 17, water is provided to the second dosing mechanism 16 and the third dosing mechanism 17, and wastewater is recycled, water resources are saved, the use of clean water is reduced, costs are reduced, wastewater discharge is reduced, pollution to the environment is reduced, environmental protection is improved, and energy conservation, emission reduction, and clean production are achieved.

[0108] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concepts of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A papermaking wastewater deep treatment system, characterized in that: include: A preliminary treatment mechanism, wherein the preliminary treatment mechanism is used to perform preliminary treatment on wastewater from the papermaking workshop; a flocculation sedimentation tank, wherein the flocculation sedimentation tank is connected to the preliminary treatment mechanism via a pipeline; a first dosing mechanism, the first dosing mechanism being connected to the flocculation sedimentation tank via a pipeline, and the first dosing mechanism being used to add a reagent to the flocculation sedimentation tank to cause flocculation and sedimentation of the wastewater in the flocculation sedimentation tank; a first sedimentation tank, wherein the first sedimentation tank is connected to the flocculation sedimentation tank via a pipeline; A Fenton reaction tank, wherein the Fenton reaction tank is connected to the first sedimentation tank via a pipeline; A degassing tank, wherein the degassing tank is connected to the Fenton reaction tank via a pipeline; A final settling tank, wherein the final settling tank is connected to the degassing tank via a pipeline; The physicochemical sludge thickening tank is connected to the first sedimentation tank through a pipeline, and the final sedimentation tank is connected to the physicochemical sludge thickening tank through a pipeline.

2. The papermaking wastewater deep treatment system according to claim 1, characterized in that: The first dosing mechanism includes a first dosing box, a second dosing box and a third dosing box. The first dosing box is connected to the flocculation sedimentation tank through a pipeline. The second dosing box is connected to the flocculation sedimentation tank through a pipeline. The third dosing box is connected to the flocculation sedimentation tank through a pipeline.

3. The papermaking wastewater deep treatment system according to claim 2, characterized in that: The papermaking wastewater deep treatment system further includes a first detection mechanism, a metering pump and a control mechanism, wherein the first detection mechanism is arranged in the flocculation sedimentation tank, and the first detection mechanism is used to detect the pH value of the wastewater in the flocculation sedimentation tank; The metering pump is arranged on the pipeline between the second dosing tank and the flocculation sedimentation tank; The first detection mechanism is electrically connected to the control mechanism, and the metering pump is electrically connected to the control mechanism. The control mechanism is used to receive the detection signal of the first detection mechanism and control the start or stop of the metering pump.

4. The papermaking wastewater advanced treatment system according to any one of claims 1 to 3, characterized in that: The papermaking wastewater deep treatment system further includes a second dosing mechanism and a third dosing mechanism; The second dosing mechanism is connected to the Fenton reaction tank via a pipeline, and the second dosing mechanism is used to add reagents to the Fenton reaction tank; The third dosing mechanism is connected to the degassing tank via a pipeline, and the third dosing mechanism is used to add reagents to the degassing tank.

5. The papermaking wastewater advanced treatment system according to any one of claims 1 to 3, characterized in that: The preliminary treatment mechanism includes a water collection tank, a primary sedimentation tank, an acidification tank, an anaerobic tower, an oxidation ditch and a secondary sedimentation tank; The primary sedimentation tank is connected to the water collection tank via a pipeline; The acidification tank is connected to the primary sedimentation tank via a pipeline; The anaerobic tower is connected to the acidification tank via a pipeline; The oxidation ditch is connected to the anaerobic tower via a pipeline; The secondary sedimentation tank is connected to the oxidation channel through a pipeline; The flocculation sedimentation tank is connected to the secondary sedimentation tank through a pipeline.

6. The papermaking wastewater deep treatment system according to claim 5, characterized in that: The papermaking wastewater deep treatment system further includes a first connecting pipeline and a first 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 first water pump is arranged on the first connecting pipeline, and the first water pump is used to directly transport the sewage in the acidification tank to the oxidation ditch.

7. The papermaking wastewater deep treatment system according to claim 1 or 2, characterized in that: The papermaking wastewater deep treatment system further comprises a reuse water pool, which is connected to the final sedimentation tank via a pipeline.

8. The papermaking wastewater advanced treatment system according to claim 7, characterized in that: The papermaking wastewater deep treatment system further includes a second water pump. The reuse water tank is connected to the first dosing mechanism through a pipeline. The second water pump is arranged on the pipeline between the reuse water tank and the first dosing mechanism.

9. The papermaking wastewater advanced treatment system according to claim 7, characterized in that: The papermaking wastewater deep treatment system also includes a third water pump, a second detection mechanism and a control mechanism; The recycled water pool is connected to the main pipe of the fire protection pipeline in the production workshop through a pipeline; The third water pump is arranged on the pipeline between the reuse water tank and the main pipe of the fire protection pipeline, and the third water pump is electrically connected to the control mechanism; The second detection mechanism is provided on the main pipe of the fire protection pipeline, the second detection mechanism is electrically connected to the control mechanism, and the second detection mechanism is used to detect the water pressure in the main pipe of the fire protection pipeline; The control mechanism is used to receive the detection signal fed back from the second detection mechanism and control the start or stop of the third water pump.

10. The papermaking wastewater advanced treatment system according to claim 4, characterized in that: The papermaking wastewater deep treatment system further includes a reuse water pool, a fourth water pump and a fifth water pump, and the reuse water pool is connected to the final sedimentation tank through a pipeline; The reuse water tank is connected to the second dosing mechanism through a pipeline, and the fourth water pump is arranged on the pipeline between the reuse water tank and the second dosing mechanism; The reuse water tank is connected to the third dosing mechanism through a pipeline, and the fifth water pump is arranged on the pipeline between the reuse water tank and the third dosing mechanism.

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