A coking wastewater treatment system

Abstract

The utility model discloses a coking wastewater treatment system, include: first component, second component and third medium drive module, first component includes at least one first reactor module, at least one first precipitator module and at least one first medium drive module that set gradually and intercommunication, second component includes at least one second reactor module, at least one second precipitator module and at least one second medium drive module that set gradually and intercommunication, and second reactor module can be linked together with first precipitator module, and third medium drive module is linked together with first reactor module, is used to supply the waste liquid of first reactor module to the processing of waiting. The utility model can effectively solve the problem that the denitrogenization and carbon removal efficiency and the limited anti-impact load capacity obtained by adopting single-stage anaerobic-aerobic process and its derivative technology lead to the problem that it is difficult to meet the processing demand.

Description

Technical Field

[0001] This utility model relates to the field of coking wastewater treatment technology, and specifically to a coking wastewater treatment system. Background Technology

[0002] Coking wastewater is a typical high-concentration, recalcitrant industrial wastewater with an extremely complex composition. In addition to high concentrations of chemical oxygen demand (COD) and ammonia nitrogen (NH3-N), it also contains bioinhibitory substances such as polyphenols, cyanides, heterocyclic compounds, and polycyclic aromatic hydrocarbons.

[0003] Currently, the anaerobic-aerobic (A / O) process and its derivative technologies have become the mainstream methods for treating coking wastewater. For example, Chinese invention patent CN1296293C, entitled "Biological Treatment Process for Coking Wastewater," describes a biofilm-based anaerobic / anoxic / two-stage aerobic treatment process for coking wastewater. The biological treatment process consists of four reactors. Pre-treated coking wastewater sequentially enters an anaerobic hydrolysis acidification reactor, an upflow anoxic reactor, a first aerobic bioreactor, and a second aerobic bioreactor. The effluent from the second aerobic bioreactor is then returned to the anoxic reactor. The hydraulic retention time in the anaerobic hydrolysis acidification reactor is 4-12 hours; in the upflow anoxic reactor, it is 9-30 hours; in the contact oxidation tank, it is 12-35 hours; and in the aerated biological filter, it is 12-35 hours. The effluent from the aerated biological filter is returned to the upflow anoxic reactor at a return ratio of 2:1 to 6:1. The effluent COD and NH3-N can be treated using a biofilm anaerobic / anoxic / two-stage aerobic process, and the treatment process can simultaneously meet the Class I standard of the National Integrated Wastewater Discharge Standard (GB9878-1996).

[0004] However, the denitrification and carbon removal efficiency and shock load resistance of single-stage anaerobic-aerobic processes and their derivative technologies are limited, making it difficult to meet the growing production and processing demands. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a coking wastewater treatment system to solve the technical problem that the existing technology, which uses a single-stage anaerobic-aerobic process and its derivative technologies, has limited denitrification and carbon removal efficiency and shock load resistance, making it difficult to meet treatment requirements.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: This utility model provides a coking wastewater treatment system, including: The primary component includes at least one first reactor module, at least one first precipitator module, and at least one first media drive module arranged sequentially and interconnected with each other; The secondary component includes at least one second reactor module, at least one second precipitator module, and at least one second media drive module, which are sequentially arranged and interconnected, and the second reactor module is capable of being connected to the first precipitator module; and The third medium driving module is connected to the first reactor module and is used to supply the waste liquid to be treated to the first reactor module.

[0007] In some embodiments, the first reactor module and the second reactor module are both anoxic / aerobic biochemical reactors, and the first precipitator module and the second precipitator module are both inclined plate precipitators.

[0008] In some embodiments, the first reactor module or the second reactor module has a first inlet end, a second inlet end, and a first outlet end. The number of first reactor modules in the primary assembly is two. The first inlet end of one first reactor module is connected to the third medium drive module, the first outlet end of the first reactor module is connected to the first inlet end of the other first reactor module, the first outlet end of the other first reactor module is connected to the first precipitator module, and the second inlet end of one first reactor module is connected to the first medium drive module.

[0009] In some embodiments, the first precipitator module or the second precipitator module has a third inlet end, a second outlet end, and a reflux end. The number of first precipitator modules in the primary assembly is two. The third inlet end of one first precipitator module is connected to the first outlet end of another first reactor module, the second outlet end of another first precipitator module is connected to the third inlet end of another first precipitator module, the second outlet end of another first precipitator module is connected to a second reactor module, and the reflux ends of the two first precipitator modules can be connected to the first medium drive module respectively.

[0010] In some embodiments, the number of first media driving modules in the primary component is two. One first media driving module is connected to the reflux end of a first precipitator module and the second liquid inlet end of a first reactor module, respectively. The other first media driving module is connected to the reflux end of another first precipitator module and the second liquid inlet end of a first reactor module, respectively.

[0011] In some embodiments, the number of the second reactor modules in the secondary component is two. The first inlet end of one second reactor module is connected to the second outlet end of the other first precipitator module, the first outlet end of the other second reactor module is connected to the first inlet end of the other second reactor module, the first outlet end of the other second reactor module is connected to the second precipitator module, and the second inlet end of one second reactor module is connected to the second medium drive module.

[0012] In some embodiments, the number of the second precipitator modules in the secondary component is two. The third inlet end of one second precipitator module is connected to the first outlet end of the other second reactor module, and the second outlet end is connected to the third inlet end of the other second precipitator module. The second outlet end of the other second precipitator module is connected to the waste liquid collection tank, and the return ends of the two second precipitator modules can be connected to the second medium drive module respectively.

[0013] In some embodiments, the number of second media driving modules in the secondary component is two. One second media driving module is connected to the reflux end of a second precipitator module and the second liquid inlet end of a second reactor module, respectively. The other second media driving module is connected to the reflux end of another second precipitator module and the second liquid inlet end of a second reactor module, respectively.

[0014] In some embodiments, the first reactor module or the second reactor module includes a first shell, a stirring assembly, and an aerator. The first shell is hollow inside and has a first liquid inlet, a second liquid inlet, and a first liquid outlet communicating with the interior. The first shell also has an overflow port, a drain valve, and a spare port. The stirring assembly is rotatably connected to the first shell for stirring the liquid inside the first shell. The aerator is built into the first shell for aeration.

[0015] In some embodiments, the first precipitator module or the second precipitator module includes a second housing, an inclined plate and a water weir. The interior of the second housing is hollow and has a third liquid inlet, a second liquid outlet and a return end that are connected to the interior. The second housing also has a drain outlet. The inclined plate is inclined downward and connected to the inner wall of the second housing. The water weir is located above the inclined plate and is connected to the second liquid outlet.

[0016] Compared with the prior art, the beneficial effects of the coking wastewater treatment system provided by this utility model include: the primary component includes at least one first reactor module, at least one first precipitator module, and at least one first media drive module, which are arranged sequentially and interconnected; the secondary component includes at least one second reactor module, at least one second precipitator module, and at least one second media drive module, which are arranged sequentially and interconnected, and the second reactor module can be connected to the first precipitator module; the third media drive module is connected to the first reactor module and is used to supply the waste liquid to be treated to the first reactor module. Compared to existing technologies, by setting up secondary components after the primary components and using a third medium-driven module to allow the wastewater to be treated to flow sequentially through at least one first reactor module, at least one first precipitator module, at least one first medium-driven module, at least one second reactor module, at least one second precipitator module, and at least one second medium-driven module, multi-stage cyclic treatment of the wastewater can be achieved. This significantly improves the efficiency of denitrification and carbon removal and enhances the resistance to shock loads, thereby increasing the treatment efficiency of coking wastewater. It can solve the technical problem that the denitrification and carbon removal efficiency and resistance to shock loads obtained by the use of single-stage anaerobic-aerobic processes and their derivative technologies in existing technologies are limited, making it difficult to meet treatment requirements. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a coking wastewater treatment system provided in one embodiment of the present invention; Figure 2 This is a schematic diagram of the second reactor module provided in one embodiment of the present invention; Figure 3 This is a schematic diagram of the second precipitator module provided in one embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: Primary component 100; First reactor module 110; First precipitator module 120; First media drive module 130; Secondary component 200; Second reactor module 210; First inlet end 211; Second inlet end 212; First outlet end 213; First shell 214; Stirring assembly 215; Aerator 216; Overflow port 217; Drain valve 218; Spare port 219; Second precipitator module 220; Third inlet end 221; Second outlet end 222; Return end 223; Second shell 224; Inclined plate 225; Weir 226; Sewage outlet 227; Second media drive module 230; Third media drive module 300. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] To address the technical problem that the denitrification and carbon removal efficiency and shock load resistance of single-stage anaerobic-aerobic processes and their derivative technologies are limited, making it difficult to meet treatment requirements, this invention provides a coking wastewater treatment system. This system enables multi-stage cyclic treatment of the wastewater by setting up a secondary component 200 after the primary component 100, and utilizing a third media drive module 300 to allow the wastewater to flow sequentially through at least one first reactor module 110, at least one first precipitator module 120, at least one first media drive module 130, at least one second reactor module 210, at least one second precipitator module 220, and at least one second media drive module 230. This significantly improves the denitrification and carbon removal efficiency and enhances the shock load resistance.

[0021] Please see Figures 1 to 3 , Figure 1 This is a schematic diagram of a coking wastewater treatment system according to an embodiment of the present invention. The coking wastewater treatment system includes: a primary component 100, a secondary component 200, and a third media driving module 300. The primary component 100 includes at least one first reactor module 110, at least one first precipitator module 120, and at least one first media driving module 130 arranged sequentially and interconnected. The secondary component 200 includes at least one second reactor module 210, at least one second precipitator module 220, and at least one second media driving module 230 arranged sequentially and interconnected. The second reactor module 210 can be connected to the first precipitator module 120. The third media driving module 300 is connected to the first reactor module 110 and is used to supply the waste liquid to be treated to the first reactor module 110.

[0022] In this device, compared with the prior art, by setting a secondary component 200 after the primary component 100, and using a third medium drive module 300 to provide the waste liquid to be treated to flow sequentially through at least one first reactor module 110, at least one first precipitator module 120, at least one first medium drive module 130, at least one second reactor module 210, at least one second precipitator module 220 and at least one second medium drive module 230, multi-stage cyclic treatment of the waste liquid to be treated can be achieved, thereby significantly improving the efficiency of denitrification and carbon removal and stronger resistance to shock loads, improving the treatment efficiency of coking wastewater, and solving the technical problem that the denitrification and carbon removal efficiency and resistance to shock loads obtained by the use of single-stage anaerobic-aerobic processes and their derivative technologies in the prior art are limited, making it difficult to meet the treatment requirements.

[0023] Furthermore, compared with the traditional single-stage A / O process, the two-stage A / O process significantly improves the biochemical treatment efficiency and system stability by connecting two sets of anoxic-aerobic reaction units in series. The first stage mainly completes carbon source removal and partial nitrification and denitrification, while the second stage further deepens the denitrification process and improves the effluent quality. This process not only effectively alleviates the problem of insufficient carbon-nitrogen ratio, but also adapts to the characteristics of large fluctuations in coking wastewater quality and high levels of toxic substances. However, in actual engineering operation, this process still faces challenges such as unstable treatment effect, poor sludge settling performance, and complex multi-stage reflux control.

[0024] In this embodiment, as Figures 1 to 3 As shown, both the first reactor module 110 and the second reactor module 210 are anoxic / aerobic biochemical reactors, and both the first precipitator module 120 and the second precipitator module 220 are inclined plate 225 precipitators.

[0025] By adopting modular design for both the anoxic / aerobic biochemical reactor and the inclined plate 225 precipitator, they can be flexibly combined to meet the simulation tasks of two-stage A / O biochemical processes and operating conditions.

[0026] Furthermore, this system enables coordinated operation and precise control of multiple units and is applicable to the water quality characteristics of coking wastewater. This is of great practical significance for deepening the research on the process mechanism, optimizing system operating parameters, and promoting engineering applications.

[0027] In one embodiment, please refer to Figure 1 , Figure 2The first reactor module 110 or the second reactor module 210 has a first inlet end 211, a second inlet end 212 and a first outlet end 213. The number of first reactor modules 110 in the primary component 100 is two. The first inlet end 211 of one first reactor module 110 is connected to the third medium drive module 300, the first outlet end 213 is connected to the first inlet end 211 of the other first reactor module 110, the first outlet end 213 of the other first reactor module 110 is connected to the first precipitator module 120, and the second inlet end 212 of one first reactor module 110 is connected to the first medium drive module 130.

[0028] To improve the efficiency of the anoxic / aerobic reaction, there are two first reactors, and the waste liquid after one reaction in the first reactor is re-entered into the other first reactor.

[0029] Furthermore, multiple connection ends are interconnected by using connecting hoses. These connecting hoses are common and readily available equipment on the market and are a conventional setup known to those skilled in the art, so they will not be described in detail here.

[0030] In one embodiment, please refer to Figure 1 , Figure 3 The first precipitator module 120 or the second precipitator module 220 has a third inlet end 221, a second outlet end 222 and a reflux end 223. The number of first precipitator modules 120 in the primary component 100 is two. The third inlet end 221 of one first precipitator module 120 is connected to the first outlet end 213 of another first reactor module 110, and the second outlet end 222 is connected to the third inlet end 221 of another first precipitator module 120. The second outlet end 222 of the other first precipitator module 120 is connected to the second reactor module 210. The reflux ends 223 of the two first precipitator modules 120 can be connected to the first medium drive module 130 respectively.

[0031] To improve the efficiency of solid-liquid separation, two first sedimentation modules 120 are used. The two-stage solid-liquid separation can improve the wastewater treatment effect.

[0032] Furthermore, multiple connection ends are interconnected by using connecting hoses. These connecting hoses are common and readily available equipment on the market and are a conventional setup known to those skilled in the art, so they will not be described in detail here.

[0033] In one embodiment, please refer to Figure 1The primary component 100 has two first media drive modules 130. One first media drive module 130 is connected to the reflux end 223 of a first precipitator module 120 and the second liquid inlet end 212 of a first reactor module 110, respectively. The other first media drive module 130 is connected to the reflux end 223 of another first precipitator module 120 and the second liquid inlet end 212 of a first reactor module 110, respectively.

[0034] In order to achieve solid-liquid separation efficiency, the slurry after secondary solid-liquid separation will re-enter the first reactor under the action of the two first medium driving modules 130 to carry out anoxic / aerobic reaction, thereby improving the treatment efficiency of coking wastewater.

[0035] Furthermore, the media drive module here includes a lift pump, a sludge return pump, and a mixed liquor return pump. The lift pump is used in the pretreatment stage, while the sludge return pump and the mixed liquor return pump are used in the biochemical treatment stage, the filtration stage, or the sludge return stage. In actual production, the specific process needs to be rationally selected based on vibration. This is a conventional setting known to those skilled in the art, and will not be elaborated further here.

[0036] In one embodiment, please refer to Figure 1 , Figure 2 The secondary component 200 has two second reactor modules 210. The first liquid inlet 211 of one second reactor module 210 is connected to the second liquid outlet 222 of another first precipitator module 120, the first liquid outlet 213 is connected to the first liquid inlet 211 of another second reactor module 210, the first liquid outlet 213 of the other second reactor module 210 is connected to the second precipitator module 220, and the second liquid inlet 212 of one second reactor module 210 is connected to the second medium drive module 230.

[0037] To improve the efficiency of the anoxic / aerobic reaction, two second reactors are used in the secondary treatment process, and the waste liquid after one reaction in the second reactor enters the other second reactor.

[0038] Furthermore, multiple connection ends are interconnected by using connecting hoses. These connecting hoses are common and readily available equipment on the market and are a conventional setup known to those skilled in the art, so they will not be described in detail here.

[0039] In one embodiment, please refer to Figure 1 , Figure 3The secondary component 200 has two second precipitator modules 220. The third inlet 221 of one second precipitator module 220 is connected to the first outlet 213 of another second reactor module 210, and the second outlet 222 is connected to the third inlet 221 of another second precipitator module 220. The second outlet 222 of the other second precipitator module 220 is connected to the waste liquid collection tank. The return ends 223 of the two second precipitator modules 220 can be connected to the second medium drive module 230 respectively.

[0040] To improve the efficiency of solid-liquid separation, two second sedimentation modules 220 are used. The two-stage solid-liquid separation can improve the wastewater treatment effect.

[0041] Furthermore, multiple connection ends are interconnected by using connecting hoses. These connecting hoses are common and readily available equipment on the market and are a conventional setup known to those skilled in the art, so they will not be described in detail here.

[0042] Furthermore, the supernatant after two biochemical reactions and two solid-liquid separations in the secondary component 200 enters the waste liquid collection tank for centralized treatment. The waste liquid collection tank is a tool specifically for collecting coking wastewater, which is a conventional setup known to those skilled in the art and will not be described in detail here.

[0043] In one embodiment, please refer to Figure 1 The secondary component 200 has two second medium driving modules 230. One second medium driving module 230 is connected to the reflux end 223 of a second precipitator module 220 and the second liquid inlet end 212 of a second reactor module 210, respectively. The other second medium driving module 230 is connected to the reflux end 223 of another second precipitator module 220 and the second liquid inlet end 212 of a second reactor module 210, respectively.

[0044] In order to achieve solid-liquid separation efficiency, the slurry after secondary solid-liquid separation by the secondary component 200 will re-enter the second reactor for anoxic / aerobic reaction under the action of the two second medium drive modules 230, thereby improving the treatment efficiency of coking wastewater.

[0045] Furthermore, the media drive module here includes a lift pump, a sludge return pump, and a mixed liquor return pump. The lift pump is used in the pretreatment stage, while the sludge return pump and the mixed liquor return pump are used in the biochemical treatment stage, the filtration stage, or the sludge return stage. In actual production, the specific process needs to be rationally selected based on vibration. This is a conventional setting known to those skilled in the art, and will not be elaborated further here.

[0046] In this embodiment, as Figure 1 , Figure 2As shown, the first reactor module 110 or the second reactor module 210 includes a first housing 214, a stirring assembly 215, and an aerator 216. The first housing 214 is hollow inside and has a first liquid inlet 211, a second liquid inlet 212, and a first liquid outlet 213 that are connected to its interior. The first housing 214 also has an overflow port 217, a drain valve 218, and a spare port 219. The stirring assembly 215 is rotatably connected to the first housing 214 and is used to stir the liquid inside the first housing 214. The aerator 216 is built into the first housing 214 and is used for aeration.

[0047] The stirring component 215 is used to stir the liquid in the first shell 214 to promote the mixing and reaction of the mixture. The aerator 216 is used to aerate the first shell 214, which can realize the aerobic-anaerobic biochemical reaction in the first shell 214.

[0048] Furthermore, the stirring component 215 and the aerator 216 here are both conventional setups for aerobic-anaerobic biochemical reactions, which are common setups known to those skilled in the art, and will not be described in detail here.

[0049] In addition, in some embodiments, valve bodies are provided on both the overflow port 217 and the spare port 219, which can realize the external discharge of the overflow port 217 and the spare port 219 to meet the function of emptying the first housing 214 or handling unexpected situations. This is a conventional setting known to those skilled in the art, and will not be described in detail here.

[0050] In one embodiment, please refer to Figure 1 , Figure 3 The first sedimentation module 120 or the second sedimentation module 220 includes a second housing 224, an inclined plate 225 and a water weir 226. The interior of the second housing 224 is hollow and has a third liquid inlet 221, a second liquid outlet 222 and a return end 223 that are connected to the interior. The second housing 224 also has a drain port 227. The inclined plate 225 is inclined downward and connected to the inner wall of the second housing 224. The water weir 226 is located above the inclined plate 225 and is connected to the second liquid outlet 222.

[0051] By using the inclined plate 225 set at an angle inside the second housing 224, solid-liquid separation can be achieved. The sludge or solid waste is discharged through the drain outlet 227, and the clarified liquid above is discharged through the water weir 226 and the second liquid outlet 222, achieving centralized collection and treatment. This will not be elaborated further here.

[0052] Furthermore, both the weir 226 and the sewage outlet 227 are equipped with valves, which can realize automated or intelligent control. This is a conventional setting known to those skilled in the art, and will not be described in detail here.

[0053] Furthermore, the bottom of the second shell 224 is provided with a slope, which can facilitate the separation of solids or precipitates from liquids, which will not be elaborated here.

[0054] To better understand this utility model, the following is combined with... Figures 1 to 3 The technical solution of this utility model is described in detail below: The primary component 100 includes at least one first reactor module 110, at least one first precipitator module 120, and at least one first media drive module 130. The first reactor module 110, the first precipitator module 120, and the first media drive module 130 are arranged sequentially and connected to each other. The secondary component 200 includes at least one second reactor module 210, at least one second precipitator module 220, and at least one second media drive module 230. The second reactor module 210, the second precipitator module 220, and the second media drive module 230 are arranged sequentially and connected to each other. The second reactor module 210 can be connected to the first precipitator module 120. The third media drive module 300 is connected to the first reactor module 110 and is used to supply the waste liquid to be treated to the first reactor module 110. Compared to existing technologies, by setting up a secondary component 200 after the primary component 100, and using a third medium drive module 300 to provide the waste liquid to be treated to flow sequentially through at least one first reactor module 110, at least one first precipitator module 120, at least one first medium drive module 130, at least one second reactor module 210, at least one second precipitator module 220 and at least one second medium drive module 230, multi-stage cyclic treatment of the waste liquid to be treated can be achieved, thereby significantly improving the efficiency of denitrification and carbon removal and stronger resistance to shock loads, and improving the treatment efficiency of coking wastewater.

[0055] Furthermore, this application uses CFD software to simulate hydraulic characteristics and optimize the structure of the reactor module and the settler module. For the reactor module, the aeration distribution is optimized to improve aeration uniformity; for the settler module, the flow pattern in the settling tank is optimized to improve solid-liquid separation efficiency.

[0056] Furthermore, by using WEST software to simulate microbial communities, a closed-loop study can be achieved: “experimental data calibration of the model → model optimization of process parameters → experimental verification of prediction results.” Through 3-4 cycles of “experiment → calibration → prediction → verification,” the model error can usually be controlled within ±10%.

[0057] In addition, in some embodiments, this application can form a coking wastewater simulation test platform through the above structure and settings, and the specific simulation steps are as follows; (1) WEST software simulation: We used WEST software to simulate the microbial community for the biochemical treatment of coking wastewater and then integrated and exported the relevant process parameters for biochemical treatment.

[0058] (2) Based on the process parameters simulated by WEST software, a primary aerobic-anaerobic process simulation was performed: The coking wastewater with pre-prepared carbon source is introduced into the first inlet end 211 of the first reactor through the third medium drive module 300. Here, the stirring component 215 is turned on, the aerator 216 is turned off, the valve at the vent is turned off, the overflow port 217 is connected to the coking wastewater collection tank through the hose, and the valve at the spare port 219 is turned off. The coking wastewater in the previous first reactor module 110 flows by gravity into the next first reactor module 110. At this time, the stirring component 215 in the next first reactor module 110 is turned off, the aerator 216 is turned on, the valve at the vent is closed, the overflow port 217 is connected to the coking wastewater collection tank through a hose, the first liquid inlet of the next first reactor module 110 is closed, and the valve at the spare port 219 of the next first reactor module 110 is also closed. The coking wastewater in the next first reactor module 110 flows by gravity into the previous first sedimentation module 120, where solid-liquid separation is performed by inclined plate 225. The supernatant enters the next first sedimentation module 120 through the effluent weir 226. The returned sludge is returned to the next first reactor module 110 through the previous first medium drive module 130. The remaining sludge is discharged through the sludge discharge port of the remaining next first sedimentation module and connected to the coking wastewater collection tank through a hose.

[0059] The operation mode of the next first precipitator module 120 is the same as that of the previous first precipitator module 120. Through two precipitation separations, the efficiency of solid-liquid separation is improved.

[0060] (3) Based on the process parameters simulated by WEST software, a two-stage aerobic-anaerobic process simulation was conducted: The operation method of the secondary aerobic-anaerobic process is the same as that of the previous aerobic-anaerobic process, and will not be repeated here.

[0061] (4) Compare the final results of the software simulation (such as COD value and ammonia nitrogen value) with the process simulation values. If the error is within ±10%, the simulation is considered successful. The simulation results can provide a reference for process design and actual operation and maintenance.

[0062] This application, through the aforementioned structure, can solve the technical problem that the existing technology, due to the limited denitrification and carbon removal efficiency and shock load resistance obtained by using a single-stage anaerobic-aerobic process and its derivative technologies, is unable to meet the treatment requirements.

[0063] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A coking wastewater treatment system, characterized in that, include: The primary component includes at least one first reactor module, at least one first precipitator module, and at least one first media drive module arranged sequentially and interconnected with each other; The secondary component includes at least one second reactor module, at least one second precipitator module, and at least one second medium drive module arranged sequentially and interconnected with each other, wherein the second reactor module can be connected to the first precipitator module; as well as The third medium driving module is connected to the first reactor module and is used to supply the waste liquid to be treated to the first reactor module.

2. The coking wastewater treatment system according to claim 1, characterized in that, Both the first reactor module and the second reactor module are anoxic / aerobic biochemical reactors, and both the first precipitator module and the second precipitator module are inclined plate precipitators.

3. The coking wastewater treatment system according to claim 1, characterized in that, The first reactor module or the second reactor module has a first inlet end, a second inlet end and a first outlet end. The number of first reactor modules in the primary component is two. The first inlet end of one first reactor module is connected to the third medium drive module, the first outlet end is connected to the first inlet end of the other first reactor module, the first outlet end of the other first reactor module is connected to the first precipitator module, and the second inlet end of one first reactor module is connected to the first medium drive module.

4. The coking wastewater treatment system according to claim 3, characterized in that, The first precipitator module or the second precipitator module has a third inlet end, a second outlet end, and a reflux end. The number of first precipitator modules in the primary component is two. The third inlet end of one first precipitator module is connected to the first outlet end of another first reactor module, and the second outlet end is connected to the third inlet end of another first precipitator module. The second outlet end of the other first precipitator module is connected to the second reactor module. The reflux ends of the two first precipitator modules can be connected to the first medium drive module.

5. The coking wastewater treatment system according to claim 4, characterized in that, The primary component comprises two first media driving modules. One first media driving module is connected to the reflux end of one first precipitator module and the second liquid inlet end of one first reactor module, respectively. The other first media driving module is connected to the reflux end of another first precipitator module and the second liquid inlet end of another first reactor module, respectively.

6. The coking wastewater treatment system according to claim 5, characterized in that, The secondary component comprises two second reactor modules. The first inlet of one second reactor module is connected to the second outlet of the other first precipitator module, the first outlet of the other second reactor module is connected to the first inlet of the other second reactor module, the first outlet of the other second reactor module is connected to the second precipitator module, and the second inlet of one second reactor module is connected to the second medium drive module.

7. The coking wastewater treatment system according to claim 6, characterized in that, The secondary component comprises two second precipitator modules. The third inlet of one second precipitator module is connected to the first outlet of the other second reactor module, and the second outlet is connected to the third inlet of the other second precipitator module. The second outlet of the other second precipitator module is connected to the waste liquid collection tank. The return ends of the two second precipitator modules are respectively connected to the second medium drive module.

8. The coking wastewater treatment system according to claim 7, characterized in that, The secondary component comprises two second media driving modules. One second media driving module is connected to the reflux end of one second precipitator module and the second liquid inlet end of one second reactor module, respectively. The other second media driving module is connected to the reflux end of another second precipitator module and the second liquid inlet end of one second reactor module, respectively.

9. The coking wastewater treatment system according to claim 3, characterized in that, The first reactor module or the second reactor module includes a first shell, a stirring assembly, and an aerator. The first shell is hollow inside and has a first liquid inlet, a second liquid inlet, and a first liquid outlet that are connected to the interior. The first shell also has an overflow port, a drain valve, and a spare port. The stirring assembly is rotatably connected to the first shell and is used to stir the liquid inside the first shell. The aerator is built into the first shell and is used for aeration.

10. The coking wastewater treatment system according to claim 4, characterized in that, The first or second sedimentation module includes a second housing, an inclined plate, and a water weir. The interior of the second housing is hollow and has a third liquid inlet, a second liquid outlet, and a return end that are connected to the interior. The second housing also has a drain outlet. The inclined plate is inclined downward and connected to the inner wall of the second housing. The water weir is located above the inclined plate and is connected to the second liquid outlet.

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