Wastewater treatment system

Abstract

The utility model discloses a wastewater treatment system, which relates to the technical field of industrial wastewater treatment, and comprises a triple-effect mechanism, a triple-effect pretreatment mechanism, a triple-effect water production tank, a three-dimensional electrocatalytic oxidation mechanism, a primary biochemical mechanism, and a deep biochemical and terminal enhanced treatment mechanism, the three-dimensional electrocatalytic oxidation mechanism comprises a first-stage catalytic oxidation assembly, a second-stage catalytic oxidation assembly, an input pipeline, an output pipeline, a first conveying pipeline, a second conveying pipeline, a third conveying pipeline, a fourth conveying pipeline, a fifth conveying pipeline, a sixth conveying pipeline and a plurality of flow control valves; the first-stage catalytic oxidation assembly comprises a first-stage catalytic tank, a first-stage solution circulating pump and a plurality of first-stage oxidation tanks; the second-stage catalytic oxidation assembly comprises a second-stage catalytic tank, a second-stage solution circulating pump and a plurality of second-stage oxidation tanks. The sewage treatment device can realize maintenance without stopping production, and can perform multi-stage electro-catalysis and oxidation treatment on a large amount of sewage, so that the biodegradability is improved.

Description

Technical Field

[0001] The present application relates to the technical field of industrial wastewater treatment, and in particular to a wastewater treatment system. Background Art

[0002] Fine chemical wastewater is a typical example of difficult-to-biodegrade industrial organic wastewater. Its B / C ratio is below 0.3, and its color is dark, making it a typical example of difficult-to-biodegrade wastewater. Furthermore, the wastewater contains high levels of refractory substances such as sulfides, phenols, macromolecular organic matter, TP, and TN. These substances are highly corrosive, pose a significant environmental risk, and are difficult to treat directly biochemically. Therefore, physical and chemical methods are required to reduce the B / C ratio to ≥ 0.3, increase biodegradability, reduce toxicity, and provide better stability for biodegradation.

[0003] When a catalytic oxidation device in a wastewater treatment system in the related art fails, it needs to be shut down for maintenance, which affects the wastewater treatment efficiency. At the same time, when the amount of sewage is large, only the catalytic oxidation device is used for catalytic oxidation, and the catalytic oxidation rate of the wastewater is low, so that the biodegradability of the wastewater passing through the wastewater treatment system is still low. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a wastewater treatment system that can be repaired without stopping production and performs multi-stage electrocatalytic and oxidation treatment on large amounts of wastewater to increase its biodegradability.

[0005] The present application provides a wastewater treatment system, comprising: a three-effect mechanism, a three-effect pretreatment mechanism, a three-effect water production tank, a three-dimensional electrocatalytic oxidation mechanism, a primary biochemical mechanism, a deep biochemical and terminal enhanced treatment mechanism;

[0006] The three-dimensional electrocatalytic oxidation mechanism includes a primary catalytic oxidation component, a secondary catalytic oxidation component, an input pipeline, an output pipeline, a first delivery pipeline, a second delivery pipeline, a third delivery pipeline, a fourth delivery pipeline, a fifth delivery pipeline, a sixth delivery pipeline and a plurality of flow control valves. The primary catalytic oxidation component includes a primary catalytic tank, a primary solution circulation pump and a plurality of primary oxidation tanks. The secondary catalytic oxidation component includes a secondary catalytic tank, a secondary solution circulation pump and a plurality of secondary oxidation tanks. The input end and the output end of the primary solution circulation pump are both connected to the interior of the primary catalytic tank. The output end of the secondary solution circulation pump is connected to the interior of the primary catalytic tank. The input end and the output end are both connected to the interior of the secondary catalytic tank, the multiple primary oxidation tanks are connected in sequence, the multiple secondary oxidation tanks are connected in sequence, the input end of the first delivery pipeline is connected to the output end of the primary catalytic tank, the output end of the first delivery pipeline is connected to the input ends of the multiple primary oxidation tanks, the input end of the second delivery pipeline is connected to the output ends of the multiple primary oxidation tanks, the output end of the second delivery pipeline is connected to the third delivery pipeline, the two ends of the third delivery pipeline are respectively connected to the output pipeline and the fourth delivery pipeline, the output end of the input pipeline is connected to the The input end of the first-stage catalytic tank is connected, the input end of the fourth delivery pipeline is connected to the input pipeline, the output end of the fourth delivery pipeline is connected to the input end of the second-stage catalytic tank, the output end of the second-stage catalytic tank is connected to the input end of multiple secondary oxidation tanks, and the output ends of multiple secondary oxidation tanks are connected to the input end of the output pipeline. The first delivery pipeline, the second delivery pipeline, the fifth delivery pipeline, the input pipeline, and the output pipeline are all provided with the flow control valve. The flow control valve on the output pipeline is provided between the input end of the fourth delivery pipeline and the first-stage catalytic tank. The flow control valve on the output pipeline is provided between the secondary oxidation tank and the third delivery pipeline. Two flow control valves are provided on each of the third delivery pipeline and the fourth delivery pipeline. The two flow control valves on the third delivery pipeline are respectively provided between the output end of the second delivery pipeline and the output pipeline, and between the output end of the second delivery pipeline and the fourth delivery pipeline. The two flow control valves on the fourth delivery pipeline are respectively provided between the third delivery pipeline and the input pipeline, and between the third delivery pipeline and the secondary catalytic tank.

[0007] The first-stage catalytic tank and the second-stage catalytic tank are both provided with a composite oxygen reduction battery catalyst based on ceria, and the plurality of the first-stage oxidation tanks and the plurality of the second-stage oxidation tanks are ozone-hydrogen peroxide coordinated reaction tanks;

[0008] The output end of the three-effect mechanism is connected to the input end of the three-effect pretreatment mechanism, the output end of the three-effect pretreatment mechanism is connected to the input end of the three-effect water production pool, the output end of the three-effect water production pool is connected to the input end of the input pipeline, the output end of the output pipeline is connected to the input end of the primary biochemical mechanism, and the output end of the primary biochemical mechanism is connected to the input end of the deep biochemical and terminal enhancement treatment mechanism.

[0009] According to some embodiments of the present application, a first oxidation content detector is provided in the primary oxidation tank connected to the input end of the second delivery pipeline, and a second oxidation content detector is provided in the secondary oxidation tank connected to the input end of the output pipeline.

[0010] According to some embodiments of the present application, the output end of the primary oxidation tank connected to the input end of the second transmission pipeline is provided with a first COD online detector, and the output end of the secondary oxidation tank connected to the input end of the output pipeline is provided with a second COD online detector.

[0011] According to some embodiments of the present application, the wastewater treatment system also includes a control device, which is respectively connected to the first oxidation content detector, the second oxidation content detector, the first COD online detector, the second COD online detector and each of the flow control valves.

[0012] According to some embodiments of the present application, the triple-effect mechanism includes an alkaline water collection tank, an acidic water collection tank, an oil-water collection tank and a neutralization water tank. The output ends of the alkaline water collection tank and the acidic water collection tank are respectively connected to the input end of the neutralization water tank, and the output ends of the oil-water collection tank and the neutralization water tank are respectively connected to the input end of the triple-effect pretreatment mechanism.

[0013] According to some embodiments of the present application, the triple-effect pretreatment mechanism includes a dissolved air flotation machine, a flotation water production tank and a triple-effect evaporator, the output end of the neutralization water tank is connected to the input end of the dissolved air flotation machine, the material output end of the dissolved air flotation machine is connected to the input end of the flotation water production tank, the output end of the flotation water production tank is connected to the input end of the triple-effect evaporator, and the output end of the triple-effect evaporator is connected to the input end of the triple-effect water production tank.

[0014] According to some embodiments of the present application, the primary biochemical mechanism further includes a primary anaerobic tank, a primary aerobic tank, a primary nitrification liquid return tank, a secondary anaerobic tank, a secondary aerobic tank and a secondary nitrification liquid return tank, the input end of the primary anaerobic tank is connected to the output end of the output pipeline, the output end of the primary anaerobic tank is connected to the input end of the primary aerobic tank, the output end of the primary aerobic tank is connected to the input end of the primary nitrification liquid return tank, the output end of the primary nitrification liquid return tank is connected to the input end of the secondary anaerobic tank, the output end of the secondary anaerobic tank is connected to the input end of the secondary aerobic tank, the output end of the secondary aerobic tank is connected to the input end of the secondary nitrification liquid return tank, and the output end of the secondary nitrification liquid return tank is connected to the input end of the deep biochemical and terminal enhancement treatment mechanism.

[0015] According to some embodiments of the present application, the deep biochemical and terminal enhanced treatment mechanism includes a CMBR biochemical tank, a flocculation sedimentation tank and a drainage tank, the input end of the CMBR biochemical tank is connected to the output end of the secondary nitrification liquid reflux tank, the output end of the CMBR biochemical tank is connected to the input end of the flocculation sedimentation tank, and the output end of the flocculation sedimentation tank is connected to the input end of the drainage tank.

[0016] According to some embodiments of the present application, the wastewater treatment system further includes a sludge thickening tank, and the sludge output ends of the dissolved air flotation machine and the flocculation sedimentation tank are both connected to the input end of the sludge thickening tank.

[0017] According to some embodiments of the present application, the wastewater treatment system further includes a sludge dewatering machine, and the output end of the sludge thickening tank is connected to the input end of the sludge dewatering machine.

[0018] In the present application, a first-stage catalytic oxidation component and a second-stage catalytic oxidation component are connected in series and in parallel, and can be operated in series or in parallel. By controlling the opening and closing of each flow control valve, the connection mode between the first-stage catalytic oxidation component and the second-stage catalytic oxidation component is controlled, and maintenance can be achieved without stopping production. When one of the catalytic oxidation components fails and needs maintenance, the first-stage catalytic oxidation component and the second-stage catalytic oxidation component are controlled to be connected in parallel, the failed catalytic oxidation component is repaired, and the other catalytic oxidation component continues to treat sewage; when the amount of sewage transported from the input pipeline is large, the first-stage catalytic oxidation component and the second-stage catalytic oxidation component are controlled to be connected in series, and the sewage is subjected to multi-stage electrocatalytic and oxidation treatment to modify difficult-to-degrade and toxic pollutants, convert large molecules into small molecules, play a role in opening the ring and shortening the chain, and increase biodegradability, especially for COD, TP, phenols and nitrogen. The difficult-to-degrade COD is modified and TP is converted into inorganic phosphorus and biodegradable organic phosphorus at the same time, and TN is modified to reduce toxicity and make it biodegradable. Through this setting, the present application can realize maintenance without stopping production, and perform multi-stage electrocatalytic and oxidation treatment on large amounts of sewage to increase biodegradability.

[0019] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Additional aspects and advantages of the present application will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0021] Figure 1 A schematic structural diagram of a three-dimensional electrocatalytic oxidation mechanism provided in an embodiment of the present application;

[0022] Figure 2 This is a schematic diagram of the structure of the wastewater treatment system provided in an embodiment of the present application.

[0023] Reference numerals:

[0024] Three-effect mechanism 110, alkaline water collection tank 111, acidic water collection tank 112, oily water collection tank 113, neutralization water tank 114;

[0025] Three-effect pretreatment mechanism 120, dissolved air flotation machine 121, flotation water production tank 122, three-effect evaporator 123;

[0026] Three-effect water production pool 130;

[0027] Three-dimensional electrocatalytic oxidation mechanism 140, input pipeline 141, output pipeline 142, first delivery pipeline 143, second delivery pipeline 144, third delivery pipeline 145, fourth delivery pipeline 146, fifth delivery pipeline 147, sixth delivery pipeline 148, flow control valve 149;

[0028] A primary catalytic tank 151, a primary solution circulation pump 152, a primary oxidation tank 153, a secondary catalytic tank 154, a secondary solution circulation pump 155, and a secondary oxidation tank 156;

[0029] Primary biochemical unit 160, primary anaerobic tank 161, primary aerobic tank 162, primary nitrification liquid return tank 163, secondary anaerobic tank 164, secondary aerobic tank 165, secondary nitrification liquid return tank 166;

[0030] Deep biochemical and terminal enhanced treatment mechanism 170, CMBR biochemical pool 171, flocculation sedimentation pool 172, drainage pool 173;

[0031] Sludge thickening tank 180 and sludge dewatering machine 181. DETAILED DESCRIPTION

[0032] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0033] In the description of this application, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0034] In the description of this application, if there is a description of first or second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0035] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0036] Fine chemical wastewater is a typical example of difficult-to-biodegrade industrial organic wastewater. Its B / C ratio is below 0.3, and its color is dark, making it a typical example of difficult-to-biodegrade wastewater. Furthermore, the wastewater contains high levels of refractory substances such as sulfides, phenols, macromolecular organic matter, TP, and TN. These substances are highly corrosive, pose a significant environmental risk, and are difficult to treat directly biochemically. Therefore, physical and chemical methods are required to reduce the B / C ratio to ≥ 0.3, increase biodegradability, reduce toxicity, and provide better stability for biodegradation.

[0037] When a catalytic oxidation device in a wastewater treatment system in the related art fails, it needs to be shut down for maintenance, which affects the wastewater treatment efficiency. At the same time, when the amount of sewage is large, only the catalytic oxidation device is used for catalytic oxidation, and the catalytic oxidation rate of the wastewater is low, so that the biodegradability of the wastewater passing through the wastewater treatment system is still low.

[0038] In order to solve the above problems, the present application proposes a wastewater treatment system. The embodiments of the present application are further described below in conjunction with the accompanying drawings.

[0039] Reference Figures 1 to 2The embodiment of the present application provides a wastewater treatment system, including a three-effect mechanism 110, a three-effect pretreatment mechanism 120, a three-effect water production pool 130, a three-dimensional electrocatalytic oxidation mechanism 140, a primary biochemical mechanism 160, and a deep biochemical and terminal enhanced treatment mechanism 170; the three-dimensional electrocatalytic oxidation mechanism 140 includes a primary catalytic oxidation component, a secondary catalytic oxidation component, an input pipeline 141, an output pipeline 142, a first delivery pipeline 143, a second delivery pipeline 144, a third delivery pipeline 145, a fourth delivery pipeline 146, a fifth delivery pipeline 147, a sixth delivery pipeline 148 and a plurality of flow control valves 149; the primary catalytic oxidation component includes a primary catalytic tank 151, a primary solution circulation pump 152 and a plurality of primary oxidation tanks 153. The secondary catalytic oxidation assembly includes a secondary catalytic tank 154, a secondary solution circulation pump 155 and a plurality of secondary oxidation tanks 156. The input end and the output end of the primary solution circulation pump 152 are both connected to the interior of the primary catalytic tank 151, the input end and the output end of the secondary solution circulation pump 155 are both connected to the interior of the secondary catalytic tank 154, the plurality of primary oxidation tanks 153 are connected in sequence, the plurality of secondary oxidation tanks 156 are connected in sequence, the input end of the first delivery pipeline 143 is connected to the output end of the primary catalytic tank 151, the output end of the first delivery pipeline 143 is connected to the input end of the plurality of primary oxidation tanks 153, the input end of the second delivery pipeline 144 is connected to the output end of the plurality of primary oxidation tanks 153, and the output end of the second delivery pipeline 144 is connected to the third delivery pipeline. The first and second delivery pipelines 143, 144, 147, 148, 150, 151 and 152 are connected to each other, the second and third delivery pipelines 143, 144, 151 and 152 are connected to each other, the output end of the input pipeline 141 is connected to the input end of the first catalytic tank 151, the input end of the fourth delivery pipeline 146 is connected to the input pipeline 141, the output end of the fourth delivery pipeline 146 is connected to the input end of the second catalytic tank 154, the output end of the second catalytic tank 154 is connected to the input end of multiple secondary oxidation tanks 156, and the output ends of multiple secondary oxidation tanks 156 are connected to the input end of the output pipeline 142. Flow control valves 149 are provided on the first delivery pipeline 143, the second delivery pipeline 144, the fifth delivery pipeline 147, the input pipeline 141 and the output pipeline 142. A flow control valve 149 is provided between the input end of the fourth delivery pipeline 146 and the primary catalytic tank 151. The flow control valve 149 on the output pipeline 142 is provided between the secondary oxidation tank 156 and the third delivery pipeline 145. Two flow control valves 149 are provided on each of the third delivery pipeline 145 and the fourth delivery pipeline 146. The two flow control valves 149 on the third delivery pipeline 145 are provided between the output end of the second delivery pipeline 144 and the output pipeline 142, and between the output end of the second delivery pipeline 144 and the fourth delivery pipeline 146, respectively. The two flow control valves 149 on the fourth delivery pipeline 146 are provided between the third delivery pipeline 145 and the input pipeline 141, and between the third delivery pipeline 145 and the secondary catalytic tank 154, respectively.Both the primary catalytic tank 151 and the secondary catalytic tank 154 are equipped with a ceria-based composite oxygen reduction cell catalyst. The multiple primary oxidation tanks 153 and the multiple secondary oxidation tanks 156 are ozone-hydrogen peroxide coordinated reaction tanks. The output of the three-effect mechanism 110 is connected to the input of the three-effect pretreatment mechanism 120, which is in turn connected to the input of the three-effect water production tank 130. The output of the three-effect water production tank 130 is connected to the input of the input pipeline 141, and the output of the output pipeline 142 is connected to the input of the primary biochemical mechanism 160. The output of the primary biochemical mechanism 160 is connected to the input of the deep biochemical and terminal enhanced treatment mechanism 170.

[0040] Specifically, the triple-effect mechanism 110 is used to collect and neutralize alkaline water, acidic water and oily water and transport the neutralized sewage to the triple-effect pretreatment mechanism 120, wherein salt-free, low-salt and high-salt wastewater are collected separately, and various salt wastewaters are divided into acidic and alkaline wastewater. After the wastewater is mixed, the pH value is about 5-8, which can partially realize the wastewater mixing, and then add acid and alkali for mixing, which will reduce the additional acid and alkali costs and reduce the problem of increased total waste salt caused by excessive addition of acid and alkali; triple-effect pretreatment The mechanism 120 is used to sequentially perform flotation treatment and evaporation desalination treatment on the sewage delivered by the triple-effect mechanism 110 and deliver the sewage after evaporation desalination treatment to the triple-effect water production tank 130. The flotation treatment removes SS, fluorine and insoluble impurities in the sewage delivered by the triple-effect mechanism 110. The triple-effect mechanism 110 removes 90% of SS, fluorine and insoluble impurities in the sewage, strengthens the modification of soluble COD, reduces the viscosity caused by large molecules, and reduces coking, so as to enable evaporation to achieve efficient desalination. The triple-effect water production tank 130 The sewage delivered from the three-effect pretreatment mechanism 120 is transported to the three-dimensional electrocatalytic oxidation mechanism 140 through the input pipeline 141. The three-dimensional electrocatalytic oxidation mechanism 140 is used to perform catalytic oxidation treatment on the sewage and then transport the catalytically oxidized sewage to the primary biochemical mechanism 160 to open the ring and chain of large molecules and toxic COD in the sewage, reduce toxicity, and increase the biodegradability of the COD. The primary biochemical mechanism 160 is used to perform A / O process treatment on the sewage delivered from the three-dimensional electrocatalytic oxidation mechanism 140 to remove organic pollutants in the wastewater and simultaneously remove nitrogen and phosphorus. For high-concentration organic wastewater and refractory wastewater, the biodegradability of the wastewater is improved. The primary biochemical mechanism 160 is also used to transport the sewage treated by the A / O process to the deep biochemical and terminal enhanced treatment mechanism 170. The deep biochemical and terminal enhanced treatment mechanism 170 is used to perform secondary biochemical treatment on the sewage delivered by the primary biochemical mechanism 160, while reducing the SS content of the biochemical effluent, preparing for chemical treatment, and terminal enhanced treatment for ammonia nitrogen, color, etc.

[0041] It's important to note that AO stands for Anoxic Oxygen. The A / O process, also known as the anaerobic-aerobic process, is primarily used in water treatment. A represents the anaerobic stage, primarily responsible for nitrogen and phosphorus removal; O represents the aerobic stage, primarily for removing organic matter from the water. In addition to removing organic pollutants from wastewater, it also simultaneously removes nitrogen and phosphorus, significantly improving the biodegradability of high-concentration organic wastewater and difficult-to-degrade wastewater. The B / C ratio refers to the ratio of BOD to COD, or the ratio of biochemical oxygen demand (BOD) to chemical oxygen demand (COD). This ratio is used to indicate the biodegradability of sewage. The higher the ratio, the better the biodegradability of the sewage and the more suitable it is for biological treatment. COD stands for Chemical Oxygen Demand, which refers to the amount of oxidant consumed to oxidize the reducing substances in 1 liter of water sample under the condition of strong acid heating digestion. It is converted into milligrams of oxygen required after each liter of water sample is completely oxidized, and is expressed in mg / L. The amount of COD reflects the degree of contamination in the water by reducing substances. The reducing substances in the water include organic matter, nitrite, sulfide, ferrous salts, etc. SS stands for Suspended Solids, which refers to the solid matter in suspended state in the wastewater.

[0042] It should be noted that when the primary catalytic oxidation component and the secondary catalytic oxidation component are connected in series, the sewage treated by the triple effect in the three-effect water production pool 130 is transported from the input pipeline 141 to the primary catalytic tank 151 and the sewage is subjected to three-dimensional electrocatalysis by the composite redox battery catalyst based on cerium dioxide in the primary catalytic tank 151 and the catalyzed sewage is transported to multiple primary oxidation tanks 153 for oxidation in sequence and the oxidized sewage is transported from the third transport pipeline 145 and the fourth transport pipeline 146 to the secondary catalytic tank 154 and is subjected to oxidation in the secondary catalytic tank 154. After three-dimensional electrocatalysis, the wastewater is transported to the secondary oxidation tank 156 through the fifth transport pipeline 147 for oxidation. The wastewater oxidized by the secondary oxidation tank 156 is output from the output pipeline 142 to the primary biochemical mechanism 160. Among them, ozone and hydrogen peroxide are respectively introduced into multiple primary oxidation tanks 153 and / or secondary oxidation tanks 156 to increase the synergistic oxidation effect, and an efficient gas and water combination method is adopted to use the hydroxyl radicals generated by hydrogen peroxide and ozone to strongly oxidize the organic matter in the water, thereby achieving the purpose of improving the biodegradability B / C and reducing the concentration of organic pollution, and also having a certain decolorization effect.

[0043] In this embodiment, the following benefits are achieved by setting up such a three-dimensional electrocatalytic oxidation mechanism 140: (1) safety is improved. Conventional electro-oxidation has problems of leakage and rapid electrode aging. The ozone and hydrogen peroxide addition process and reaction process pose certain safety risks to equipment and personnel. The three-dimensional electrocatalytic oxidation mechanism 140 in this application can achieve quantitative multi-point addition when using ozone and hydrogen peroxide as oxidants to ensure that ozone does not overflow and hydrogen peroxide reacts fully and completely; (2) cost is reduced: Since the three-dimensional electrocatalytic oxidation mechanism 140 in this application belongs to combined catalytic oxidation, the reaction speed is fast, the reagent use efficiency is high, and the residence time is 1 / 8 to 1 / 10 of that of conventional oxidation, so the operating cost is greatly reduced.

[0044] It should be noted that, through multiple primary oxidation tanks 153 pairs, a multi-stage three-dimensional catalytic method is used. The catalytic carrier uses a variety of precious metal composites loaded on the dioxide as a catalyst, making the oxidation more efficient and faster. The oxidant is produced on site and used on site without manual addition. There is no need to adjust the pH when the pH is 5-11, no sludge is generated, and it operates at normal temperature and pressure. After multiple engineering verifications, it can completely replace Fenton and wet oxidation technologies in wastewater treatment. It is more efficient and stable than the existing three-dimensional electrocatalysis, electro-flocculation, ozone oxidation, photocatalytic oxidation, etc.; the three-dimensional electrocatalytic oxidation technology is an improved Electrocatalytic oxidation technology, this technology fills carbon-based catalyst particles with specific catalytic and conductive properties between the main electrode plates. After the plates are energized, bipolar particle electrodes are formed between the catalyst particles. The particle electrodes are used to form many tiny electrolytic oxidation units between the main electrodes. Redox reactions are carried out on each catalyst particle, effectively utilizing the electrolytic space to strengthen the electric field and improve the oxidation efficiency. At the same time, the three-dimensional electrocatalytic oxidation treatment technology with particle electrodes has a higher specific surface area and a shorter mass transfer distance, which solves the problems of low current efficiency and mass transfer limitations encountered in traditional two-dimensional electrolysis.

[0045] It should be noted that the primary solution circulation pump 152 and the secondary solution circulation pump 155 installed on the primary catalytic tank 151 and the secondary catalytic tank 154 circulate the sewage in the tank between the plates to prevent the electrolysis effect from being reduced, the water output effect from being unstable, and the energy from being wasted due to uneven water quality.

[0046] The three-dimensional electrocatalytic oxidation mechanism 140 in this application is used to modify difficult-to-degrade and toxic pollutants, convert large molecules into small molecules, play a role in opening the ring and shortening the chain, and increase biodegradability, especially for COD, TP, phenols and nitrogen. The difficult-to-degrade COD is modified and TP is converted into inorganic phosphorus and biodegradable organic phosphorus. TN is modified to reduce toxicity so that it can be biodegraded, providing a guarantee for long-term and stable production of biochemical products.

[0047] In this embodiment, if Figure 1As shown, three primary oxidation tanks 153 connected in sequence and three secondary oxidation tanks 156 connected in sequence are provided; in other embodiments, other numbers of primary oxidation tanks 153 and secondary oxidation tanks 156 may be provided as needed, and are not limited to the embodiments of the present application.

[0048] In the present application, a first-stage catalytic oxidation component and a second-stage catalytic oxidation component are connected in series and in parallel, and can be operated in series or in parallel. By controlling the opening and closing of each flow control valve 149, the connection mode between the first-stage catalytic oxidation component and the second-stage catalytic oxidation component is controlled, and maintenance can be achieved without stopping production. When one of the catalytic oxidation components fails and needs maintenance, the first-stage catalytic oxidation component and the second-stage catalytic oxidation component are controlled to be connected in parallel, and the failed catalytic oxidation component is repaired, and the other catalytic oxidation component continues to treat sewage. When the amount of sewage transported from the input pipeline 141 is large, the first-stage catalytic oxidation component and the second-stage catalytic oxidation component are controlled to be connected in series. By performing multi-stage electrocatalytic and oxidation treatment on the sewage, the difficult-to-degrade and toxic pollutants are modified, and the large molecules are converted into small molecules, which plays a role in opening the ring and shortening the chain and increasing biodegradability, especially for COD, TP, phenols and nitrogen. The difficult-to-degrade COD is modified and TP is converted into inorganic phosphorus and biodegradable organic phosphorus at the same time. TN is modified to reduce toxicity and make it biodegradable. Through this setting, the present application can realize maintenance without stopping production, and perform multi-stage electrocatalytic and oxidation treatment on large amounts of sewage to increase biodegradability.

[0049] It can be understood that a first oxidation content detector is provided in the primary oxidation tank 153 connected to the input end of the second delivery pipeline 144, and a second oxidation content detector is provided in the secondary oxidation tank 156 connected to the input end of the output pipeline 142.

[0050] It can be understood that the output end of the primary oxidation tank 153 connected to the input end of the second transmission pipeline 144 is provided with a first COD online detector, and the output end of the secondary oxidation tank 156 connected to the input end of the output pipeline 142 is provided with a second COD online detector.

[0051] It is understandable that the wastewater treatment system also includes a control device, which is respectively connected to the first oxidation content detector, the second oxidation content detector, the first COD online detector, the second COD online detector and each flow control valve 149.

[0052] The current molecular micro-electrolysis, iron-carbon bed, electro-flocculation oxidation, ozone, Fenton, photocatalysis, wet oxidation, etc. are unable to truly quantify the oxidants, there are many human interference factors, and the oxidation process is difficult to control.

[0053] It should be noted that the first-stage catalytic tank 151 and the second-stage catalytic tank 154 are respectively connected to the ozone and hydrogen peroxide delivery pipelines, and the ozone and hydrogen peroxide delivery pipelines are connected to precision metering pumps, and each precision metering pump is connected to the control device.

[0054] In some embodiments, a flow monitor is provided on each delivery pipeline, and each flow monitor is connected to a control device. The control device controls the precise metering pump to pump the amount of hydrogen peroxide and ozone into the corresponding first-stage catalytic tank 151 or the second-stage catalytic tank 154 according to the flow monitoring signals sent by the flow monitors on the first delivery pipeline 143 and the fifth delivery pipeline 147.

[0055] It should be noted that conventional electro-oxidation processes are subject to leakage and rapid electrode aging, and the ozone and hydrogen peroxide dosing and reaction processes pose certain safety risks to equipment and personnel. This catalytic advanced oxidation process, using ozone and hydrogen peroxide as oxidants, enables quantitative, multi-point dosing, ensuring that ozone does not escape and that the hydrogen peroxide reacts fully and completely.

[0056] It should be noted that the first COD online detector is used to detect the COD content of the sewage at the output end of the last-stage primary oxidation tank 153 connected to the input end of the second transmission pipeline 144 and transmit the signal corresponding to the COD content to the control device; the first COD online detector is used to detect the COD of the sewage at the output end of the last-stage secondary oxidation tank 156 connected to the input end of the output pipeline 142 and transmit the signal corresponding to the oxidation content to the control device.

[0057] In some embodiments, when the primary catalytic oxidation component and the secondary catalytic oxidation component operate in parallel, the control device controls the flow control valve 149 on the corresponding second delivery pipeline 144 or output pipeline 142 to open according to the first signal or the second signal, so as to output the oxidized sewage in the primary oxidation tank 153 and the secondary oxidation tank 156 from the output pipeline 142 to the primary biochemical mechanism 160.

[0058] It should be noted that the first oxidation content detector is used to detect the oxidation content of the output end of the last-stage primary oxidation tank 153 connected to the input end of the second delivery pipeline 144 and transmit the first signal corresponding to the oxidation content to the control device. The control device determines whether the oxidation content of the output end of the first-stage oxidation tank 153 is 0 or close to 0 based on the first signal; the second oxidation content detector is used to detect the oxidation content of the output end of the last-stage secondary oxidation tank 156 connected to the input end of the output pipeline 142 and transmit the second signal corresponding to the oxidation content to the control device. The control device determines whether the oxidation content of the output end of the secondary oxidation tank 156 is 0 or close to 0 based on the second signal.

[0059] In some embodiments, the control device is a PLC control device, and the catalytic advanced oxidation adopts PLC control, which can realize automatic and manual control, and can operate in fully automatic, semi-automatic and manual modes, solving the problem of equipment instability and treatment effect fluctuations caused by human factors.

[0060] For example, when the primary catalytic oxidation assembly and the secondary catalytic oxidation assembly need to be connected in series, the control device controls the flow control valve 149 on the fourth delivery line 146 near the input line 141 to be closed, controls the flow control valve 149 on the fourth delivery line 146 near the secondary catalytic tank 154 to be opened, controls the flow control valves 149 on the input line 141, the first delivery line 143, the second delivery line 144, the fifth delivery line 147 and the output line 142 to be opened, controls the flow control valve 149 on the third delivery line 145 near one end of the fourth delivery line 146 to be opened, and controls the flow control valve 149 on the third delivery line 145 near one end of the fourth delivery line 146 to be opened. 45, the flow control valve 149 near the end of the output pipeline 142 is closed; when the primary catalytic oxidation component and the secondary catalytic oxidation component need to be connected in parallel, and when the primary catalytic oxidation component and the secondary catalytic oxidation component need to be used at the same time, the control device controls the two flow control valves 149 on the fourth delivery pipeline 146 to be opened, controls the flow control valves 149 on the input pipeline 141, the first delivery pipeline 143, the second delivery pipeline 144, the fifth delivery pipeline 147 and the output pipeline 142 to be opened, controls the flow control valve 149 on the third delivery pipeline 145 near the end of the fourth delivery pipeline 146 to be closed, and controls the flow control valve 149 on the third delivery pipeline 145 near the end of the fourth delivery pipeline 146 to be closed. The flow control valve 149 on the delivery line 145 near the end of the output line 142 is opened; when the primary catalytic oxidation component and the secondary catalytic oxidation component need to be connected in parallel and only the primary catalytic oxidation component is used, the control device controls the two flow control valves 149 on the fourth delivery line 146 to be closed, controls the flow control valves 149 on the input line 141, the first delivery line 143, and the second delivery line 144 to be opened, controls the flow control valves 149 on the fifth delivery line 147 and the output line 142 to be closed, and controls the flow control valve 149 on the third delivery line 145 near the end of the fourth delivery line 146 to be closed. 9 is closed, and the flow control valve 149 on the third delivery pipeline 145 near the output pipeline 142 is controlled to be opened; when the first-stage catalytic oxidation component and the second-stage catalytic oxidation component need to be connected in parallel and only the second-stage catalytic oxidation component is used, the control device controls the two flow control valves 149 on the fourth delivery pipeline 146 to be opened, controls the flow control valves 149 on the input pipeline 141, the first delivery pipeline 143, and the second delivery pipeline 144 to be closed, controls the flow control valves 149 on the fifth delivery pipeline 147 and the output pipeline 142 to be opened, and controls the two flow control valves 149 on the third delivery pipeline 145 to be closed.

[0061] Reference Figure 2It can be understood that the triple-effect mechanism 110 includes an alkaline water collection tank 111, an acidic water collection tank 112, an oil-water collection tank 113 and a neutralization water tank 114, and the output ends of the alkaline water collection tank 111, the acidic water collection tank 112 and the oil-water collection tank 113 are respectively connected to the input end of the neutralization water tank 114, and the output end of the neutralization water tank 114 is connected to the input end of the triple-effect pretreatment mechanism 120.

[0062] It should be noted that the alkaline water collection tank 111 is used to transport the collected alkaline wastewater to the neutralization tank 114, the acidic water collection tank 112 is used to transport the collected acidic wastewater to the neutralization tank 114, and the oily water collection tank 113 is used to transport the collected oily wastewater to the neutralization tank 114. The alkaline wastewater and the acidic wastewater are mixed in the neutralization tank 114 in a certain proportion so that the pH value of the wastewater reaches a neutral range.

[0063] Reference Figure 2 It can be understood that the triple-effect pretreatment mechanism 120 includes a dissolved air flotation machine 121, a flotation water production tank 122 and a triple-effect evaporator 123. The output end of the neutralization water tank 114 is connected to the input end of the dissolved air flotation machine 121, the material output end of the dissolved air flotation machine 121 is connected to the input end of the flotation water production tank 122, the output end of the flotation water production tank 122 is connected to the input end of the triple-effect evaporator 123, and the output end of the triple-effect evaporator 123 is connected to the input end of the triple-effect water production tank 130.

[0064] It should be noted that the dissolved air flotation machine 121 is a commonly used water treatment equipment, mainly used in sewage treatment plants to remove suspended matter and oil pollution in water; specifically, the functions of the dissolved air flotation machine 121 are: (1) flotation to remove suspended matter: the dissolved air flotation machine 121 dissolves air in water and then releases it in the flotation tank to form a large number of tiny bubbles. These tiny bubbles have a large specific surface area and can attach suspended matter particles to the bubble surface to form floats, thereby separating the suspended matter from the water; (2) flotation to remove oil pollution: the dissolved air flotation After the machine 121 dissolves the gas in the water, it releases the gas into the flotation tank, generating a large number of tiny bubbles. When these bubbles float in the water, they adhere to the oil particles, causing the oil particles to sink and float, thereby achieving the purpose of removing the oil; (3) Improving the sewage treatment effect: The dissolved air flotation machine 121 can quickly remove suspended matter and oil in the water, thereby effectively purifying the water quality. It is used in the pretreatment stage of the sewage treatment plant, and can improve the effect of subsequent treatment processes (such as biological treatment, membrane filtration, etc.), reduce the load of the equipment, and improve the treatment efficiency.

[0065] It should be noted that the principle of the triple-effect evaporator 123 is that it uses the secondary steam generated by the first evaporator as a heating source and introduces it into another evaporator. As long as the pressure and boiling point of the solution in the evaporator are controlled to appropriately lower them, the secondary steam generated by the first evaporator can be used for heating. At this time, the condensation point of the first evaporator becomes the heating point of the second evaporator, which is the principle of multiple-effect evaporation. Each evaporator is called an effect, and the evaporator that introduces the raw steam is the first effect. The evaporator with the secondary steam is the second effect, the third effect, and so on. The characteristics of the triple-effect evaporator 123 are: short material heating time, fast evaporation rate, high concentration ratio, effective maintenance of the original material effect, significant energy saving effect, saving about 70% of evaporation capacity compared to the single-effect evaporator. The material evaporates and concentrates in a closed system, creating a clean and comfortable environment. The equipment has a unique defoaming device to prevent material leakage. All parts that come into contact with the material are made of imported stainless steel and polished. The equipment has good corrosion resistance and is easier to clean, more in line with pharmaceutical and food hygiene regulations. It can be equipped with a microcomputer control system, which is easier to use and more stable.

[0066] Reference Figure 2 It can be understood that the primary biochemical mechanism 160 also includes a primary anaerobic tank 161, a primary aerobic tank 162, a primary nitrification liquid return tank 163, a secondary anaerobic tank 164, a secondary aerobic tank 165 and a secondary nitrification liquid return tank 166. The input end of the primary anaerobic tank 161 is connected to the output end of the output pipeline 142, the output end of the primary anaerobic tank 161 is connected to the input end of the primary aerobic tank 162, the output end of the primary aerobic tank 162 is connected to the input end of the primary nitrification liquid return tank 163, the output end of the primary nitrification liquid return tank 163 is connected to the input end of the secondary anaerobic tank 164, the output end of the secondary anaerobic tank 164 is connected to the input end of the secondary aerobic tank 165, the output end of the secondary aerobic tank 165 is connected to the input end of the secondary nitrification liquid return tank 166, and the output end of the secondary nitrification liquid return tank 166 is connected to the input end of the deep biochemical and terminal enhanced treatment mechanism 170.

[0067] It should be noted that the first-stage anaerobic tank 161, the first-stage aerobic tank 162, the first-stage nitrification liquid return tank 163, the second-stage anaerobic tank 164, the second-stage aerobic tank 165 and the second-stage nitrification liquid return tank 166 are combined to form a multi-stage A / 0. The application of the multi-stage A / 0 in fine chemical wastewater can reflect more and more advantages. First, it makes the anaerobic, facultative aerobic and aerobic environments more complete and the bacterial community richer; second, the operation process is easy to control and does not require high management personnel. Even if there is an erroneous operation, there will be no large fluctuations; third, it is conducive to sludge reduction by biochemical methods, so that the amount of biochemical sludge is close to controllable within a certain range; fourth, it has a simple structure and is easy to maintain.

[0068] Reference Figure 2It can be understood that the deep biochemical and terminal enhanced treatment mechanism 170 includes a CMBR biochemical tank 171, a flocculation sedimentation tank 172 and a drainage tank 173. The input end of the CMBR biochemical tank 171 is connected to the output end of the secondary nitrification liquid return tank 166, the output end of the CMBR biochemical tank 171 is connected to the input end of the flocculation sedimentation tank 172, and the output end of the flocculation sedimentation tank 172 is connected to the input end of the drainage tank 173.

[0069] It should be noted that the ultrasonic vibration membrane bioreactor wastewater treatment equipment is referred to as CMBR.

[0070] In this embodiment, deep biochemical and terminal enhanced treatment technologies are added on the basis of multi-stage A / 0, so that the biochemical process is more active, the operating effect is better and more stable, and the recovery speed after suspension is faster. Improvements and enhancements are mainly made in the following links: enhanced biological denitrification and phosphorus removal. This process technology is targeted at the COD and denitrification of the factory, as well as for future dephosphorization (new phosphorus-containing products), and adopts a combination of micro-denitrification and phosphorus removal and macro-denitrification and phosphorus removal technologies; micro-denitrification and phosphorus removal refers to the ability to simultaneously enrich aerobic bacteria, facultative anaerobic bacteria and anaerobic bacteria in biological carriers, so that a large amount of nitrification and denitrification reactions can be formed, and normal digestion reactions are combined with short-range digestion to make the nitrogen removal effect better. Under the action of polyphosphate bacteria, phosphorus is biologically enriched in aerobic and facultative anaerobic environments and removed in the sedimentation tank.

[0071] Reference Figure 2 It is understandable that the wastewater treatment system further includes a sludge thickening tank 180 , and the sludge output ends of the dissolved air flotation machine 121 and the flocculation sedimentation tank 172 are both connected to the input end of the sludge thickening tank 180 .

[0072] It should be noted that the sludge thickening tank 180 is a facility for reducing the water content of sludge. During the sewage treatment process, the sewage after preliminary treatment will contain a large amount of suspended solid matter, which requires further treatment to meet the discharge standards. The sludge thickening tank 180 reduces the sludge volume through physical methods and improves the efficiency of subsequent treatment, thereby reducing the pressure on the environment; specifically, the sludge thickening tank 180 mainly relies on the principle of gravity sedimentation to achieve sludge concentration. The solid particles in the sewage gradually sink to the bottom of the tank under the action of gravity to form concentrated sludge, and the supernatant is discharged through the overflow port and continues to enter the subsequent treatment unit. This simple physical separation process effectively reduces the water content of the sludge and provides convenience for subsequent dehydration or digestion steps.

[0073] Reference Figure 2 It is understandable that the wastewater treatment system further includes a sludge dewatering machine 181 , and the output end of the sludge thickening tank 180 is connected to the input end of the sludge dewatering machine 181 .

[0074] Specifically, the sludge dewatering machine 181 is a physical treatment device. Its principle is to use centrifugal force and pressure to dehydrate the sludge. First, the sludge with high water content is transported to the inside of the dewatering machine through a conveying device, and then the sludge is sent into the filter area through a screw propeller. While the filter rotates, it uses centrifugal force to separate the water, thereby reducing the water content of the sludge, and finally discharged through the discharge port.

[0075] It should be noted that the functions of the sludge dewatering machine 181 are: (1) improving the dryness of the sludge. The moisture content of the sludge produced by sludge treatment is very high, usually reaching more than 80%, and the sludge dewatering machine 181 can reduce the moisture content of the sludge to below 60%, thereby achieving efficient and high-quality sludge dewatering effects. By improving the dryness of the sludge, the amount of wastewater generated can be reduced, reducing pollution to the environment; (2) reducing transportation costs. The moisture content of the sludge after dehydration is low, which can reduce the generation of a large amount of wastewater, thereby reducing transportation volume and transportation costs. At the same time, after the water in the sludge is separated, the weight of the sludge is also reduced, which can reduce transportation pressure and reduce transportation costs; (3) improving the sludge treatment efficiency. The sludge dewatering machine 181 has a fast dehydration speed and can process a large amount of sludge in a short time. Moreover, since the volume of the dehydrated sludge is small, the treatment efficiency can also be improved.

[0076] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0077] The above is a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

[0078] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A wastewater treatment system, characterized in that: include: Three-effect mechanism, three-effect pretreatment mechanism, three-effect water production pool, three-dimensional electrocatalytic oxidation mechanism, primary biochemical mechanism, deep biochemical and terminal enhanced treatment mechanism; The three-dimensional electrocatalytic oxidation mechanism includes a primary catalytic oxidation component, a secondary catalytic oxidation component, an input pipeline, an output pipeline, a first delivery pipeline, a second delivery pipeline, a third delivery pipeline, a fourth delivery pipeline, a fifth delivery pipeline, a sixth delivery pipeline and a plurality of flow control valves. The primary catalytic oxidation component includes a primary catalytic tank, a primary solution circulation pump and a plurality of primary oxidation tanks. The secondary catalytic oxidation component includes a secondary catalytic tank, a secondary solution circulation pump and a plurality of secondary oxidation tanks. The input end and the output end of the primary solution circulation pump are both connected to the interior of the primary catalytic tank. The output end of the secondary solution circulation pump is connected to the interior of the primary catalytic tank. The input end and the output end are both connected to the interior of the secondary catalytic tank, the multiple primary oxidation tanks are connected in sequence, the multiple secondary oxidation tanks are connected in sequence, the input end of the first delivery pipeline is connected to the output end of the primary catalytic tank, the output end of the first delivery pipeline is connected to the input ends of the multiple primary oxidation tanks, the input end of the second delivery pipeline is connected to the output ends of the multiple primary oxidation tanks, the output end of the second delivery pipeline is connected to the third delivery pipeline, the two ends of the third delivery pipeline are respectively connected to the output pipeline and the fourth delivery pipeline, the output end of the input pipeline is connected to the The input end of the first-stage catalytic tank is connected, the input end of the fourth delivery pipeline is connected to the input pipeline, the output end of the fourth delivery pipeline is connected to the input end of the second-stage catalytic tank, the output end of the second-stage catalytic tank is connected to the input end of multiple secondary oxidation tanks, and the output ends of multiple secondary oxidation tanks are connected to the input end of the output pipeline. The first delivery pipeline, the second delivery pipeline, the fifth delivery pipeline, the input pipeline, and the output pipeline are all provided with the flow control valve. The flow control valve on the output pipeline is provided between the input end of the fourth delivery pipeline and the first-stage catalytic tank. The flow control valve on the output pipeline is provided between the secondary oxidation tank and the third delivery pipeline. Two flow control valves are provided on each of the third delivery pipeline and the fourth delivery pipeline. The two flow control valves on the third delivery pipeline are respectively provided between the output end of the second delivery pipeline and the output pipeline, and between the output end of the second delivery pipeline and the fourth delivery pipeline. The two flow control valves on the fourth delivery pipeline are respectively provided between the third delivery pipeline and the input pipeline, and between the third delivery pipeline and the secondary catalytic tank. The first-stage catalytic tank and the second-stage catalytic tank are both provided with a composite oxygen reduction battery catalyst based on ceria, and the plurality of the first-stage oxidation tanks and the plurality of the second-stage oxidation tanks are ozone-hydrogen peroxide coordinated reaction tanks; The output end of the three-effect mechanism is connected to the input end of the three-effect pretreatment mechanism, the output end of the three-effect pretreatment mechanism is connected to the input end of the three-effect water production pool, the output end of the three-effect water production pool is connected to the input end of the input pipeline, the output end of the output pipeline is connected to the input end of the primary biochemical mechanism, and the output end of the primary biochemical mechanism is connected to the input end of the deep biochemical and terminal enhancement treatment mechanism.

2. The wastewater treatment system according to claim 1, characterized in that The first oxidation tank connected to the input end of the second delivery pipeline is provided with a first oxidation content detector, and the second oxidation tank connected to the input end of the output pipeline is provided with a second oxidation content detector.

3. The wastewater treatment system according to claim 2, characterized in that: The output end of the primary oxidation tank connected to the input end of the second delivery pipeline is provided with a first COD online detector, and the output end of the secondary oxidation tank connected to the input end of the output pipeline is provided with a second COD online detector.

4. The wastewater treatment system according to claim 3, characterized in that The wastewater treatment system also includes a control device, which is respectively connected to the first oxidation content detector, the second oxidation content detector, the first COD online detector, the second COD online detector and each of the flow control valves.

5. The wastewater treatment system according to claim 1, characterized in that: The triple-effect mechanism includes an alkaline water collection tank, an acidic water collection tank, an oil-water collection tank and a neutralization water tank. The output ends of the alkaline water collection tank and the acidic water collection tank are respectively connected to the input end of the neutralization water tank, and the output ends of the oil-water collection tank and the neutralization water tank are respectively connected to the input end of the triple-effect pretreatment mechanism.

6. The wastewater treatment system according to claim 5, characterized in that: The three-effect pretreatment mechanism includes a dissolved air flotation machine, an air flotation water production pool and a three-effect evaporator. The output end of the neutralization water pool is connected to the input end of the dissolved air flotation machine, the material output end of the dissolved air flotation machine is connected to the input end of the air flotation water production pool, the output end of the air flotation water production pool is connected to the input end of the three-effect evaporator, and the output end of the three-effect evaporator is connected to the input end of the three-effect water production pool.

7. The wastewater treatment system according to claim 6, characterized in that: The primary biochemical mechanism also includes a primary anaerobic tank, a primary aerobic tank, a primary nitrification liquid return tank, a secondary anaerobic tank, a secondary aerobic tank and a secondary nitrification liquid return tank. The input end of the primary anaerobic tank is connected to the output end of the output pipeline, the output end of the primary anaerobic tank is connected to the input end of the primary aerobic tank, the output end of the primary aerobic tank is connected to the input end of the primary nitrification liquid return tank, the output end of the primary nitrification liquid return tank is connected to the input end of the secondary anaerobic tank, the output end of the secondary anaerobic tank is connected to the input end of the secondary aerobic tank, the output end of the secondary aerobic tank is connected to the input end of the secondary nitrification liquid return tank, and the output end of the secondary nitrification liquid return tank is connected to the input end of the deep biochemical and terminal enhanced treatment mechanism.

8. The wastewater treatment system according to claim 7, characterized in that: The deep biochemical and terminal enhanced treatment mechanism includes a CMBR biochemical tank, a flocculation sedimentation tank and a drainage tank. The input end of the CMBR biochemical tank is connected to the output end of the secondary nitrification liquid reflux tank, the output end of the CMBR biochemical tank is connected to the input end of the flocculation sedimentation tank, and the output end of the flocculation sedimentation tank is connected to the input end of the drainage tank.

9. The wastewater treatment system according to claim 8, characterized in that: The wastewater treatment system further comprises a sludge thickening tank, and the sludge output ends of the dissolved air flotation machine and the flocculation sedimentation tank are both connected to the input end of the sludge thickening tank.

10. The wastewater treatment system according to claim 9, characterized in that: The wastewater treatment system further comprises a sludge dewatering machine, and the output end of the sludge concentration tank is connected to the input end of the sludge dewatering machine.

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