Papermaking wastewater treatment system

Abstract

The utility model relates to a papermaking wastewater treatment system. An anaerobic tower is connected with an acidification pool through a pipeline; the oxidation ditch is connected with the anaerobic tower through a pipeline; the deep treatment mechanism is connected with the oxidation channel through a pipeline; the metering channel is connected with the deep treatment mechanism through a pipeline; the detection mechanism is used for detecting the nitrogen content of wastewater in the metering channel; one end of the first connecting pipeline is connected with the acidification pool, and the other end of the first connecting pipeline is connected with the oxidation ditch; the water outlet pump is arranged on the first connecting pipeline; the water outlet pump is electrically connected with the control mechanism, and the control mechanism is used for receiving feedback signals of the detection mechanism and controlling starting or stopping of the water outlet pump. When the detection mechanism detects that the nitrogen content of the wastewater exceeds a preset value, the detection mechanism sends a feedback signal to the control mechanism, and controls to start the water outlet pump to directly convey the wastewater in the acidification pool into the oxidation ditch through the first connecting pipeline, so that the total nitrogen content in water in the oxidation ditch is reduced, the denitrification efficiency of the oxidation ditch is improved, the chemical consumption is reduced, and the cost is reduced.

Description

Technical Field

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

[0002] The oxidation ditch (i.e. aerobic pool) removes COD from the water through microbial action and removes nitrogen through nitrification and denitrification. The optimal carbon-nitrogen ratio of the oxidation ditch is 70:1. When the total nitrogen content in the oxidation ditch is high, the carbon source can be increased to improve the activity of microorganisms, thereby further removing the total nitrogen in the water.

[0003] Currently, organic matter such as glucose and starch is added to the oxidation ditch to increase the carbon source, achieve a suitable carbon-nitrogen ratio, and improve denitrification performance. This method requires the purchase of a large amount of glucose to increase the carbon source, which is costly. In addition, in order to increase the activity of sludge and increase aeration, the electricity consumption cost is high. Utility Model Content

[0004] Therefore, it is necessary to provide a papermaking wastewater treatment system to solve the existing problem of increasing carbon sources by adding organic matter such as glucose and starch to the oxidation ditch to achieve a suitable carbon-nitrogen ratio and improve denitrification performance. This method requires the purchase of a large amount of glucose to increase the carbon source, which is costly. In addition, in order to increase the activity of sludge and increase aeration, the electricity consumption cost is high.

[0005] To achieve the above object, the inventor provides a papermaking wastewater treatment system, comprising:

[0006] Acidification pond;

[0007] An anaerobic tower, wherein the anaerobic tower is connected to the acidification tank via a pipeline;

[0008] An oxidation ditch, wherein the oxidation ditch is connected to the anaerobic tower via a pipeline;

[0009] A deep treatment mechanism, the deep treatment mechanism is connected to the oxidation channel through a pipeline, and the deep treatment mechanism is used to perform deep purification treatment on the wastewater;

[0010] A metering channel, wherein the metering channel is connected to the deep processing mechanism through a pipeline;

[0011] A detection mechanism, the detection mechanism is used to detect the nitrogen content of the wastewater in the metering channel;

[0012] a first connecting pipeline, one end of which is connected to the acidification tank, and the other end of which is connected to the oxidation ditch;

[0013] A water outlet pump, the water outlet pump is arranged on the first connecting pipeline;

[0014] and a control mechanism, the water outlet pump is electrically connected to the control mechanism, and the control mechanism is used to receive the feedback signal of the detection mechanism and control the start or shut down of the water outlet pump.

[0015] As a preferred structure of the utility model, the papermaking wastewater treatment system further comprises a water collection tank, and the acidification tank is connected to the water collection tank via a pipeline.

[0016] As a preferred structure of the utility model, the deep treatment mechanism includes a coagulation reaction tank, and the coagulation reaction tank is connected to the oxidation channel through a pipeline.

[0017] As a preferred structure of the utility model, the deep treatment mechanism also includes a coagulation sedimentation tank, and the coagulation sedimentation tank is connected to the coagulation reaction tank through a pipeline.

[0018] As a preferred structure of the utility model, the deep treatment mechanism also includes a Fenton reaction tank, and the Fenton reaction tank is connected to the coagulation sedimentation tank through a pipeline.

[0019] As a preferred structure of the utility model, the deep treatment mechanism also includes a Fenton sedimentation tank, the Fenton sedimentation tank is connected to the Fenton reaction tank through a pipeline, and the metering channel is connected to the Fenton sedimentation tank through a pipeline.

[0020] As a preferred structure of the present invention, the papermaking wastewater treatment system also includes an alarm mechanism, which is electrically connected to the control mechanism. The alarm mechanism is used to issue an alarm, and the control mechanism is also used to receive a feedback signal from the detection mechanism and control the start or shut down of the alarm mechanism.

[0021] As a preferred structure of the utility model, the alarm mechanism is an audible and visual alarm.

[0022] As a preferred structure of the present utility model, the detection mechanism is an ammonia nitrogen detector.

[0023] As a preferred structure of the present invention, the papermaking wastewater treatment system also includes a control switch, which is arranged on the first connecting pipeline. The control switch is electrically connected to the control mechanism, and the control mechanism is also used to receive the feedback signal of the detection mechanism and control the opening or closing of the control switch.

[0024] Different from the prior art, the beneficial effects of the above technical solution are as follows: the papermaking wastewater treatment system of the utility model includes: an acidification tank; an anaerobic tower, the anaerobic tower is connected to the acidification tank through a pipeline; an oxidation ditch, the oxidation ditch is connected to the anaerobic tower through a pipeline; a deep treatment mechanism, the deep treatment mechanism is connected to the oxidation ditch through a pipeline, and the deep treatment mechanism is used to perform deep purification treatment on the wastewater; a metering channel, the metering channel is connected to the deep treatment mechanism through a pipeline; a detection mechanism, the detection mechanism is used to detect the nitrogen content of the wastewater in the metering channel; a first connecting pipeline, 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; a water outlet pump, the water outlet pump is arranged on the first connecting pipeline; and a control mechanism, the water outlet pump is electrically connected to the control mechanism, and the control mechanism is used to receive the feedback signal of the detection mechanism and control the start or shut down of the water outlet pump. The papermaking wastewater treatment system of the utility model detects the nitrogen content of the wastewater in the metering channel in real time through a detection mechanism. When the detection mechanism detects that the nitrogen content of the wastewater exceeds a preset value, the detection mechanism sends a feedback signal to the control mechanism. The control mechanism performs identification processing and controls the start of the water outlet pump. The water outlet pump starts to operate and directly transports the wastewater in the acidification tank to the oxidation ditch through the first connecting pipeline. Since the wastewater in the acidification tank is decomposed into sugar, fatty acid and amino acid by microorganisms, the sugar decomposed in the acidification tank is used to replace the carbon source to supplement and balance the carbon-nitrogen ratio of the oxidation ditch, so as to ensure that the optimal carbon-nitrogen ratio of the oxidation ditch is achieved, the denitrification efficiency of the oxidation ditch is improved, the addition of organic matter into the oxidation ditch is reduced, the drug consumption is reduced, the cost is reduced, the number of surface aerators turned on is reduced, and the energy consumption is reduced. When the detection mechanism detects that the nitrogen content of the wastewater is lower than the preset value, the detection mechanism sends a feedback signal to the control mechanism, and the control mechanism performs identification and processing, and controls the closure of the outlet pump, the outlet pump stops running, and stops directly transporting the wastewater in the acidification tank to the oxidation ditch through the first connecting pipeline, so as to ensure that the optimal carbon-nitrogen ratio of the oxidation ditch is achieved.

[0025] The above-mentioned records related to the content of the utility model are only an overview of the technical solution of the present application. In order to enable ordinary technicians in the field to more clearly understand the technical solution of the present application, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purpose and other purposes, features and advantages of the present application easier to understand, the following is an explanation in combination with the specific implementation method and drawings of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of the present application and other related contents, and shall not be considered as limitations of the present application.

[0027] In the drawings of the specification:

[0028] Figure 1 This is one of the flow diagrams of the papermaking wastewater treatment system described in the specific implementation method;

[0029] Figure 2 The second schematic diagram of the process of the papermaking wastewater treatment system described in the specific implementation method;

[0030] Figure 3 The third flow diagram of the papermaking wastewater treatment system described in the specific implementation method;

[0031] Figure 4 The fourth flow diagram of the papermaking wastewater treatment system described in the specific implementation method;

[0032] Figure 5 It is a circuit connection diagram of the papermaking wastewater treatment system described in the specific implementation method.

[0033] The reference numerals in the above drawings are described as follows:

[0034] 1. Catchment pool,

[0035] 2. Acidification tank,

[0036] 3. Anaerobic tower,

[0037] 4. Oxidation ditch,

[0038] 5. Deep processing mechanism,

[0039] 51. Coagulation reaction tank,

[0040] 52. Coagulation sedimentation tank,

[0041] 53. Fenton reaction pool,

[0042] 54. Fenton sedimentation tank,

[0043] 6. Metering channel,

[0044] 61. Water flow sensor,

[0045] 7. The first connecting pipeline,

[0046] 71. Water outlet pump,

[0047] 72. Control switch,

[0048] 8. Testing agency,

[0049] 9. Control agency,

[0050] 10. Alarm agency. DETAILED DESCRIPTION

[0051] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, 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 the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0052] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0053] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0054] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0055] In the present 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 relationship of quantity, priority or sequence between these entities or operations.

[0056] Without further limitations, in this application, the words "include", "comprises", "has" 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 limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0057] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, 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 way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0058] 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, rather than indicating or implying 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 another element "on" or "under", but also be indirectly connected to another element "on" or "under" through an intermediate element.

[0059] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "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 it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0060] See also Figures 1 to 5 , this embodiment relates to a papermaking wastewater treatment system, comprising:

[0061] Acidification tank 2: Acidification tank 2 is a tank that produces acidic substances through fermentation by microorganisms that degrade organic matter. The wastewater in acidification tank 2 is decomposed into sugars, fatty acids and amino acids by microorganisms. In this process, microorganisms will produce some organic acids, such as acetic acid and propionic acid. These organic acids can reduce the pH value of wastewater to about 4.5-5.0, creating conditions for subsequent treatment of wastewater.

[0062] Anaerobic tower 3, the anaerobic tower 3 is connected to the acidification tank 2 through a pipeline; the main function of the anaerobic tower is to remove organic matter from wastewater and reduce the emission of harmful gases. Anaerobic tower 3 can effectively degrade and transform organic pollutants in wastewater, such as suspended matter, organic matter, grease, etc., reduce the concentration of organic matter and COD (chemical oxygen demand) content. And anaerobic tower 3 can also convert organic matter into reusable anaerobic digestion products, such as methane. Anaerobic tower 3 can achieve wastewater purification and resource utilization, which meets the requirements of environmental protection and sustainable development.

[0063] The oxidation ditch 4 is connected to the anaerobic tower 3 through a pipeline; the oxidation ditch 4 converts organic pollutants into harmless substances through a biological reaction process, while realizing energy recovery and water reuse. In this process, organic matter in the wastewater is decomposed into smaller organic molecules, which are then oxidized and degraded into carbon dioxide and water by microorganisms in turn, and converted into the energy required by the microorganisms through redox reactions, thereby achieving the effect of nitrogen removal and phosphorus removal.

[0064] A deep treatment mechanism 5 is connected to the oxidation ditch 4 through a pipeline. The deep treatment mechanism 5 is used to perform deep purification treatment on the wastewater to further treat the wastewater and improve environmental protection.

[0065] The metering channel 6 is connected to the deep treatment mechanism 5 through a pipeline; the main function of the metering channel 6 is to ensure the reasonable distribution and use of the treated wastewater, and to provide accurate data support for relevant departments for the scientific management of water resources. Specifically, in this embodiment, a water flow sensor 61 is provided in the metering channel 6. Figure 5 As shown, the water flow sensor 61 is electrically connected to the control mechanism 9 , and the flow rate in the water is detected by the water flow sensor 61 , and the detection result is fed back to the control mechanism 9 and displayed on the display screen of the control mechanism 9 .

[0066] The detection mechanism 8 is used to detect the nitrogen content of the wastewater in the metering channel 6; preferably, in the present embodiment, the detection mechanism 8 is an ammonia nitrogen detector, which is selected because of its advantages such as high accuracy, simple operation and good stability.

[0067] A first connecting pipeline 7, one end of which is connected to the acidification tank 2, and the other end of which is connected to the oxidation ditch 4. When the nitrogen content in the water of the metering channel 6 exceeds the standard, the wastewater in the acidification tank 2 is directly transported to the oxidation ditch 4 through the first connecting pipeline 7. Since the wastewater in the acidification tank 2 is decomposed into sugar, fatty acid and amino acid by microorganisms, the sugar decomposed in the acidification tank 2 is used to replace the carbon source to supplement and balance the carbon-nitrogen ratio of the oxidation ditch 4, so as to ensure that the optimal carbon-nitrogen ratio of the oxidation ditch 4 is achieved, the denitrification efficiency of the oxidation ditch 4 is improved, the addition of organic matter into the oxidation ditch 4 is reduced, the drug consumption is reduced, the cost is reduced, the number of surface aerators turned on is reduced, and the energy consumption is reduced.

[0068] The outlet pump 71 is disposed on the first connecting pipeline 7 ; the wastewater in the acidification tank 2 is transported to the oxidation ditch 4 through the outlet pump 71 .

[0069] And a control mechanism 9, the water outlet pump 71 is electrically connected to the control mechanism 9, the control mechanism 9 is used to receive the feedback signal of the detection mechanism 8, and control the start or shut down of the water outlet pump 71, so as to achieve interlocking. Specifically, in this embodiment, the control mechanism 9 is a DCS control system, and the control mechanism 9 includes a DCS controller and a display screen, and the DCS controller is electrically connected to the display screen. It should be noted that the structure of the control mechanism 9 of this embodiment is not limited to this, and those skilled in the art can select other suitable control mechanisms 9 according to the teachings of this embodiment.

[0070] Specifically, in the papermaking wastewater treatment system of this embodiment, the detection mechanism 8 detects the nitrogen content of the wastewater in the metering channel 6 in real time. When the detection mechanism 8 detects that the nitrogen content of the wastewater exceeds the preset value, the detection mechanism 8 sends a feedback signal to the control mechanism 9, and the control mechanism 9 performs identification processing and controls the start of the water outlet pump 71. The water outlet pump 71 starts to operate and directly transports the wastewater in the acidification tank 2 to the oxidation ditch 4 through the first connecting pipeline 7. Since the wastewater in the acidification tank 2 is decomposed into sugar, fatty acids and amino acids by microorganisms, the sugar decomposed by the acidification tank 2 is used to replace the carbon source to supplement and balance the carbon-nitrogen ratio of the oxidation ditch 4 to ensure that the optimal carbon-nitrogen ratio of the oxidation ditch 4 is achieved, the denitrification efficiency of the oxidation ditch 4 is improved, the addition of organic matter to the oxidation ditch 4 is reduced, the drug consumption is reduced, the cost is reduced, the number of surface aeration machines turned on is reduced, and the energy consumption is reduced. According to actual feedback, the cost of adding organic matter is reduced by 0.5 yuan / ton of water; the power consumption is reduced by 0.1 yuan / ton of water. When the detection mechanism 8 detects that the nitrogen content of the wastewater is lower than the preset value, the detection mechanism 8 sends a feedback signal to the control mechanism 9, and the control mechanism 9 performs identification processing and controls the closure of the outlet pump 71, the outlet pump 71 stops running, and stops directly transporting the wastewater in the acidification tank 2 to the oxidation ditch 4 through the first connecting pipeline 7 to ensure that the optimal carbon-nitrogen ratio of the oxidation ditch 4 is achieved. It should be noted that the preset value of the nitrogen content of the wastewater can be adjusted and set according to actual conditions. 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 detection mechanism 8 detects that the nitrogen content of the wastewater exceeds the preset value, the outlet pump 71 extracts about 10% of the wastewater in the acidification tank 2 and directly transports it to the oxidation ditch 4, and the remaining 90% of the wastewater in the acidification tank 2 flows into the anaerobic tower 3. The proportion of the extracted wastewater can be adjusted according to actual conditions.

[0071] Optionally, in some embodiments, such as Figure 2 As shown, the papermaking wastewater treatment system further comprises a water collection tank 1, and the acidification tank 2 is connected to the water collection tank 1 through a pipeline. The water collection tank 1 is used to collect and store water from the papermaking production workshop to improve environmental protection.

[0072] Optionally, in some embodiments, such as Figure 4 As shown, the deep treatment mechanism 5 includes a coagulation reaction tank 51, and the coagulation reaction tank 51 is connected to the oxidation ditch 4 through a pipeline. The coagulation reaction tank 51 is a device for treating sewage, and its main function is to coagulate pollutants in the water. Coagulation refers to the process of agglomerating suspended particles in water into larger particles by physical or chemical methods, so that they are easier to separate, filter or biodegrade. The function of the coagulation reaction tank 51 is to disperse the pollutants in the water into the tank, and then add coagulants and mixing equipment to mix and stir them, so that they are agglomerated into agglomerates, which is convenient for subsequent treatment steps.

[0073] Optionally, in some embodiments, such as Figure 4 As shown, the deep treatment mechanism 5 also includes a coagulation sedimentation tank 52, which is connected to the coagulation reaction tank 51 through a pipeline. The coagulation sedimentation tank 52 is a physical purification tank, and the function of the coagulation sedimentation tank 52 is to remove suspended particles in the sewage by coagulation and sedimentation to reduce the turbidity of the sewage and the concentration of organic matter, thereby achieving a pretreatment effect.

[0074] Optionally, in some embodiments, such as Figure 4 As shown, the deep treatment mechanism 5 also includes a Fenton reaction tank 53, which is connected to the coagulation sedimentation tank 52 through a pipeline. The Fenton reaction tank 53 is an environmental engineering equipment for treating organic pollutants in water. The Fenton reaction tank 53 uses the Fenton reaction to decompose and oxidize organic compounds and convert them into relatively harmless substances, thereby reducing the degree of pollution in the water body.

[0075] Optionally, in some embodiments, such as Figure 4 As shown, the deep processing mechanism 5 also includes a Fenton sedimentation tank 54, and the Fenton sedimentation tank 54 is connected to the Fenton reaction tank 53 through a pipeline, and the metering channel 6 is connected to the Fenton sedimentation tank 54 through a pipeline. The Fenton sedimentation tank 54 is a structure that uses sedimentation to remove suspended matter in the water. The Fenton sedimentation tank 54 removes suspended matter in the water by natural sedimentation or coagulation sedimentation of water. The effluent from the Fenton reaction tank 53 flows to the Fenton sedimentation tank 54 by gravity, and after adding alkali to adjust the pH to neutral, an appropriate amount of polyacrylamide is added for flocculation and precipitation. It should be noted that the structure of the deep processing mechanism 5 of this embodiment is not limited to this, and those skilled in the art can select other suitable deep processing mechanisms 5 according to the teachings of this embodiment.

[0076] Optionally, in some embodiments, such as Figure 3 As shown, the papermaking wastewater treatment system also includes an alarm mechanism 10, which is electrically connected to the control mechanism 9. The alarm mechanism 10 is used to sound an alarm to remind the staff that the nitrogen content of the wastewater in the metering channel 6 exceeds the preset value and needs to be promptly treated. The control mechanism 9 is used to receive the feedback signal of the detection mechanism 8 and control the start or shut down of the water outlet pump 71 and the alarm mechanism 10. Preferably, in this embodiment, the alarm mechanism 10 is an audible and visual alarm. It should be noted that in this embodiment, after the alarm mechanism 10 sounds an alarm, the staff can manually shut down the alarm mechanism 10 after discovering it.

[0077] Specifically, the nitrogen content of the wastewater in the metering channel 6 is detected in real time by the detection mechanism 8. When the detection mechanism 8 detects that the nitrogen content of the wastewater exceeds the preset value, the detection mechanism 8 sends a feedback signal to the control mechanism 9. The control mechanism 9 performs identification processing and controls the start of the water outlet pump 71 and the alarm mechanism 10. The alarm mechanism 10 sounds an alarm to remind the staff that the nitrogen content of the wastewater in the metering channel 6 exceeds the preset value and needs to be paid attention to and processed in time; the water outlet pump 71 starts to operate and directly transports the wastewater in the acidification tank 2 to the oxidation ditch 4 through the first connecting pipeline 7. Since the wastewater in the acidification tank 2 is decomposed into sugars, fatty acids and amino acids by microorganisms, the sugar decomposed in the acidification tank 2 is used to replace the carbon source to supplement and balance the carbon-nitrogen ratio of the oxidation ditch 4, so as to ensure that the optimal carbon-nitrogen ratio of the oxidation ditch 4 is achieved, the denitrification efficiency of the oxidation ditch 4 is improved, the addition of organic matter into the oxidation ditch 4 is reduced, the drug consumption is reduced, the cost is reduced, the number of surface aerators turned on is reduced, and the energy consumption is reduced. According to actual feedback, the cost of adding organic matter is reduced by 0.5 yuan / ton of water; the power consumption is reduced by 0.1 yuan / ton of water. When the detection mechanism 8 detects that the nitrogen content of the wastewater is lower than the preset value, the detection mechanism 8 sends a feedback signal to the control mechanism 9, and the control mechanism 9 performs identification processing and controls the closure of the outlet pump 71 and the alarm mechanism 10. The outlet pump 71 stops running and stops directly transporting the wastewater in the acidification tank 2 to the oxidation ditch 4 through the first connecting pipeline 7 to ensure that the optimal carbon-nitrogen ratio of the oxidation ditch 4 is achieved. It should be noted that the preset value of the nitrogen content of the wastewater can be adjusted and set according to actual conditions. In this embodiment, the preset value of the nitrogen content of the wastewater is 5 mg / L.

[0078] Optionally, in some embodiments, such as Figure 3 As shown, the papermaking wastewater treatment system further includes a control switch 72, which is disposed on the first connecting pipeline 7, and is electrically connected to the control mechanism 9, and the control mechanism 9 is also used to receive the feedback signal of the detection mechanism 8 and control the opening or closing of the control switch 72. Specifically, in this embodiment, the control switch 72 is a solenoid valve.

[0079] Specifically, the nitrogen content of the wastewater in the metering channel 6 is detected in real time by the detection mechanism 8. When the detection mechanism 8 detects that the nitrogen content of the wastewater exceeds the preset value, the detection mechanism 8 sends a feedback signal to the control mechanism 9. The control mechanism 9 performs identification processing and controls the start of the outlet pump 71 and the opening of the control switch 72. The opening of the control switch 72 allows the wastewater to flow into the oxidation ditch 4 through the first connecting pipeline 7; the outlet pump 71 starts to operate and directly transports the wastewater in the acidification tank 2 to the oxidation ditch 4 through the first connecting pipeline 7. Since the wastewater in the acidification tank 2 is decomposed into sugar, fatty acids and amino acids by microorganisms, the sugar decomposed by the acidification tank 2 is used to replace the carbon source to supplement and balance the carbon-nitrogen ratio of the oxidation ditch 4 to ensure that the optimal carbon-nitrogen ratio of the oxidation ditch 4 is achieved, the denitrification efficiency of the oxidation ditch 4 is improved, the addition of organic matter to the oxidation ditch 4 is reduced, the drug consumption is reduced, the cost is reduced, the number of surface aerators turned on is reduced, and the energy consumption is reduced. According to actual feedback, the cost of adding organic matter is reduced by 0.5 yuan / ton of water; the power consumption is reduced by 0.1 yuan / ton of water. When the detection mechanism 8 detects that the nitrogen content of the wastewater is lower than the preset value, the detection mechanism 8 sends a feedback signal to the control mechanism 9, and the control mechanism 9 performs identification processing and controls the effluent pump 71 and the control switch 72 to close, and the effluent pump 71 stops running, and stops directly transporting the wastewater in the acidification tank 2 to the oxidation ditch 4 through the first connecting pipeline 7, so as to ensure that the optimal carbon-nitrogen ratio of the oxidation ditch 4 is achieved. It should be noted that the preset value of the nitrogen content of the wastewater can be adjusted and set according to actual conditions. In this embodiment, the preset value of the nitrogen content of the wastewater is 5 mg / L.

[0080] 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 concept 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 treatment system, characterized in that: include: Acidification pond; An anaerobic tower, wherein the anaerobic tower is connected to the acidification tank via a pipeline; An oxidation ditch, wherein the oxidation ditch is connected to the anaerobic tower via a pipeline; A deep treatment mechanism, the deep treatment mechanism is connected to the oxidation channel through a pipeline, and the deep treatment mechanism is used to perform deep purification treatment on the wastewater; A metering channel, wherein the metering channel is connected to the deep processing mechanism through a pipeline; A detection mechanism, the detection mechanism is used to detect the nitrogen content of the wastewater in the metering channel; a first connecting pipeline, one end of which is connected to the acidification tank, and the other end of which is connected to the oxidation ditch; A water outlet pump, the water outlet pump is arranged on the first connecting pipeline; and a control mechanism, the water outlet pump is electrically connected to the control mechanism, and the control mechanism is used to receive the feedback signal of the detection mechanism and control the start or shut down of the water outlet pump.

2. The papermaking wastewater treatment system according to claim 1, characterized in that: The papermaking wastewater treatment system also includes a water collection tank, and the acidification tank is connected to the water collection tank through a pipeline.

3. The papermaking wastewater treatment system according to claim 1, characterized in that: The deep treatment mechanism comprises a coagulation reaction tank, and the coagulation reaction tank is connected to the oxidation channel through a pipeline.

4. The papermaking wastewater treatment system according to claim 3, characterized in that: The deep treatment mechanism also includes a coagulation sedimentation tank, and the coagulation sedimentation tank is connected to the coagulation reaction tank through a pipeline.

5. The papermaking wastewater treatment system according to claim 4, characterized in that: The deep treatment mechanism also includes a Fenton reaction tank, and the Fenton reaction tank is connected to the coagulation sedimentation tank through a pipeline.

6. The papermaking wastewater treatment system according to claim 5, characterized in that: The deep treatment mechanism also includes a Fenton sedimentation tank, the Fenton sedimentation tank is connected to the Fenton reaction tank through a pipeline, and the metering channel is connected to the Fenton sedimentation tank through a pipeline.

7. The papermaking wastewater treatment system according to claim 1, characterized in that: The papermaking wastewater treatment system also includes an alarm mechanism, which is electrically connected to the control mechanism and is used to issue an alarm. The control mechanism is also used to receive a feedback signal from the detection mechanism and control the start or shut down of the alarm mechanism.

8. The papermaking wastewater treatment system according to claim 7, characterized in that: The alarm mechanism is an audible and visual alarm.

9. The papermaking wastewater treatment system according to claim 1, characterized in that: The detection mechanism is an ammonia nitrogen detector.

10. The papermaking wastewater treatment system according to claim 1, characterized in that: The papermaking wastewater treatment system also includes a control switch, which is arranged on the first connecting pipeline and is electrically connected to the control mechanism. The control mechanism is also used to receive a feedback signal from the detection mechanism and control the opening or closing of the control switch.

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