Integrated combined unit for enhanced treatment of semi-coke wastewater

Abstract

This utility model discloses an integrated combined device for the enhanced treatment of semi-coke wastewater, comprising a high-volume-load aerobic device, a chemical destabilization and high-efficiency oxidation device, and an AO biological treatment device, all with identical rectangular box structures. The length-to-width ratio of the cross-section of each rectangular box structure is 2:1, and each is divided into several accommodating cavities by partitions. Each rectangular box structure includes an equipment installation space for mounting auxiliary equipment within its multiple accommodating cavities. All equipment installation spaces have identical cross-sections, are located at the same end along the length of the corresponding rectangular box structure, and occupy approximately 1 / 4 of its length. Apart from the equipment installation spaces, all remaining accommodating cavities are wastewater treatment spaces for water treatment. This utility model enables more convenient installation of the semi-coke wastewater treatment device, lowers the practical cost, and increases treatment efficiency.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to an integrated combined device for enhanced treatment of semi-coke wastewater. Background Technology

[0002] Coal can be dry-distilled at medium and low temperatures to produce semi-coke. Semi-coke wastewater is industrial wastewater generated during the semi-coke production process, including circulating water used in the process, various separation waters, wastewater generated during quenching, and wastewater generated at the bottom of the cooling dry-distillation furnace. Semi-coke wastewater contains hundreds of pollutants with a very complex composition. It contains over thirty kinds of organic pollutants, mainly phenols, tar-like substances, benzene homologues, and aromatic compounds. Inorganic pollutants mainly include ammonia nitrogen, sulfides, and cyanides. The wastewater has extremely high color, and the pollutants pose a significant threat to humans, crops, and aquatic life. Its COD can reach 30,000–40,000 mg / L, ammonia nitrogen can reach 5,000–15,000 mg / L, and even at low concentrations, phenol concentrations are above 1,800 mg / L. Therefore, the wastewater must be treated to meet relevant standards before discharge.

[0003] Currently, there is no mature treatment technology for semi-coke wastewater; most treatment processes are based on those used for coking wastewater with similar water quality. Treatment of semi-coke wastewater primarily involves pretreatment to separate and recover most of the oil and valuable substances (such as phenols and ammonia). The resulting wastewater then undergoes biological and advanced treatment. Pretreatment commonly employs separation and deoiling, stripping for deacidification and deammoniation, and extraction for phenol removal. Even after pretreatment, the wastewater still contains a large amount of recalcitrant and biotoxic substances, posing a significant challenge to subsequent biological treatment.

[0004] After pretreatment, the semi-coke wastewater undergoes further biological treatment. However, because the wastewater contains microbial inhibitory substances such as phenols, cyanides, and sulfides, these substances, when exceeding the toxicity threshold of microorganisms, have a significant inhibitory effect on their treatment capacity, especially on nitrifying bacteria. This results in low treatment efficiency and leads to unstable and inefficient system operation.

[0005] Due to the aforementioned problems with existing technologies, it is almost impossible to achieve the desired treatment effect using a single treatment process based on the basic characteristics of semi-coke wastewater. Instead, it is necessary to select different technologies for combined treatment. In addition, traditional processes suffer from excessively high operating costs and low treatment efficiency. For some small-volume or emergency projects, the construction cycle of traditional civil engineering for environmental protection buildings / structures is long and the investment is large.

[0006] Therefore, how to make the equipment for treating semi-coke wastewater more convenient to install, lower in practical cost, and more efficient in treatment has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0007] In view of the above-mentioned deficiencies of the prior art, this utility model provides an integrated combined device for the enhanced treatment of semi-coke wastewater, the purpose of which is to make the device for treating semi-coke wastewater more convenient to install, lower in practical cost, and higher in treatment efficiency.

[0008] To achieve the above objectives, this utility model discloses an integrated combined device for enhanced treatment of semi-coke wastewater, including a high-volume load aerobic device with the same cross-section and all of which are rectangular box structures, a chemical destabilization and high-efficiency oxidation device, and an AO biochemical treatment device.

[0009] The length-to-width ratio of the cross-section of all the rectangular box structures is 2:1, and each is divided into several accommodating cavities by several partitions;

[0010] All of the partitions are arranged parallel or perpendicular to the sidewalls of the corresponding rectangular box structure;

[0011] Each of the multiple accommodating cavities in each of the rectangular box structures includes an equipment installation space for setting up supporting equipment;

[0012] The cross-sections of the equipment installation spaces of the high-volume load aerobic device, the chemical destabilization high-efficiency oxidation device, and the AO biochemical treatment device are all the same, all located at the same end of the length direction of the corresponding rectangular box structure, and all occupy 1 / 4 of the length.

[0013] In each of the rectangular box structure's plurality of accommodating cavities, apart from the equipment installation space, all remaining accommodating cavities are wastewater treatment spaces used for water treatment.

[0014] Preferably, the high-volume-load aerobic device, excluding the corresponding equipment installation space, is divided into four wastewater treatment spaces by a transverse partition and a longitudinal partition;

[0015] The four wastewater treatment spaces of the high-volume-load aerobic device are arranged in a rectangular row and column in cross-section. The cross-sections of the two wastewater treatment spaces closest to the corresponding equipment installation space are square, and the cross-sections of the two wastewater treatment spaces far from the equipment installation space are rectangular.

[0016] In the high-volume-load aerobic device, the two wastewater treatment spaces with square cross-sections are a sludge regeneration tank and a sedimentation tank, respectively, and the wastewater treatment space with rectangular cross-sections adjacent to the sludge regeneration tank is a high-load aerobic tank.

[0017] The equipment installation space of the high-volume-load aerobic device is equipped with an aerobic dosing device, an aerobic device power control cabinet, an aeration blower, and a first sludge return pump.

[0018] More preferably, the high volumetric load aerobic device is provided with a first inlet, a first outlet and a first vent on its outer side;

[0019] External sewage enters through the first inlet;

[0020] The first inlet is connected to the top of the high-load aerobic tank via a pipe and is equipped with a flow meter for measurement;

[0021] The sludge regeneration tank and the high-load aerobic tank are connected at the top by an opening;

[0022] The high-load aerobic tank is connected to the top of the sedimentation tank by a pipe;

[0023] Both the sludge regeneration tank and the high-load aerobic tank are equipped with aeration pipes at the bottom.

[0024] The high-load aerobic tank is equipped with domesticated aerobic microorganisms, and the attachment and growth ability and shock resistance of the aerobic microorganisms are enhanced by adding a compound biological modifier.

[0025] The composite biomodifier includes a porous adsorption matrix, a microporous biocarrier, iron-based responsive particles, an alkaline coagulant aid, and a cationic polymer.

[0026] The sedimentation tank is equipped with a sludge hopper at the bottom, which is connected to the top of the sludge regeneration tank via a pipe including a first sludge return pump.

[0027] More preferably, the aerobic dosing device includes a biological modifier dosing system and a nutrient dosing system;

[0028] The biological modifier dosing system adds the biological modifier to the high-load aerobic tank;

[0029] The nutrient dosing system adds nutrients to the sludge regeneration tank;

[0030] The aerobic device power distribution control cabinet is used for the power supply and distribution and system control of the high-volume-load aerobic device;

[0031] The aeration blower and the first sludge return pump are used for supplying air to the aerobic process and promoting sludge circulation, respectively.

[0032] Preferably, the chemical destabilizing high-efficiency oxidation device, excluding the corresponding equipment installation space, is divided into six wastewater treatment spaces by two transverse partitions and one longitudinal partition;

[0033] The six wastewater treatment spaces of the chemical destabilizing high-efficiency oxidation device are arranged in a rectangular row of two rows and three columns in cross-section, and each cross-section is square.

[0034] In the six wastewater treatment spaces of the chemical destabilizing high-efficiency oxidation device, the three wastewater treatment spaces in one row, starting from the wastewater treatment space adjacent to the corresponding equipment installation space, are sequentially a first sedimentation tank, a high-efficiency oxidation reaction tank, and a coagulation tank; the three wastewater treatment spaces in the other row, starting from the wastewater treatment space adjacent to the corresponding equipment installation space, are sequentially a clear water tank, a second sedimentation tank, and a flocculation tank.

[0035] Within the first sedimentation tank, a chemical destabilizing tank is provided at the angle between the side wall adjacent to the corresponding equipment installation space and the outer wall;

[0036] The equipment installation space of the chemical destabilizing high-efficiency oxidation device is equipped with a chemical destabilizing dosing system, a first sludge pump, a second sludge pump, a clean water lift pump, and a chemical destabilizing power distribution control cabinet.

[0037] More preferably, the chemical destabilizing tank, the first sedimentation tank, the high-efficiency oxidation reaction tank, the coagulation tank, the flocculation tank, the second sedimentation tank, and the clear water tank are connected in sequence;

[0038] The chemical destabilizing high-efficiency oxidation device is provided with a second water inlet, a second water outlet, and a second vent outlet on its outer side;

[0039] The chemical destabilizing tank is connected to the first inlet of the high-volume-load aerobic device through the second inlet, and is equipped with a mixer and a condition-controlled linkage dosing system.

[0040] The first sedimentation tank is connected to the first sludge pump and is connected to the top of the chemical destabilizing tank via a pipe, and a sludge hopper is provided at the bottom;

[0041] The high-efficiency oxidation reaction tank carries out high-efficiency oxidation reaction, is connected to the top of the first sedimentation tank, and is equipped with two kinds of composite oxidant dosing ports;

[0042] The coagulation tank is connected to the top of the high-efficiency oxidation reaction tank and is equipped with an auxiliary coagulant dosing port;

[0043] The flocculation tank is connected to the top of the coagulation tank and is equipped with a polyacrylamide dosing port;

[0044] The second sedimentation tank is connected to the top of the flocculation tank, connected to the second sludge pump, connected to the top of the clear water tank, and has a sludge hopper at the bottom;

[0045] The clear water tank stores the supernatant and is connected to the clear water lift pump and the second outlet.

[0046] The first sludge pump is connected to the bottom of the first sedimentation tank for timed sludge discharge.

[0047] The second sludge pump is connected to the bottom of the second sedimentation tank for timed sludge discharge.

[0048] More preferably, the chemical destabilizing dosing system includes a chemical destabilizing agent dosing system, a composite oxidizing agent dosing system, an auxiliary coagulant dosing system, and a polyacrylamide dosing system;

[0049] The chemical destabilizer dosing system adds the chemical destabilizer to the chemical destabilization tank;

[0050] The composite oxidant dosing system adds the reagent to the high-efficiency oxidation reaction tank;

[0051] The auxiliary coagulant dosing system adds the auxiliary coagulant to the coagulation tank;

[0052] The polyacrylamide dosing system adds polyacrylamide to the flocculation tank.

[0053] Preferably, the AO biochemical treatment device, excluding the corresponding equipment installation space, is divided into four wastewater treatment spaces by a horizontal partition and a vertical partition;

[0054] The four wastewater treatment spaces of the AO biochemical treatment device are arranged in a rectangular row and column in cross-section. The cross-sections of the two wastewater treatment spaces closest to the corresponding equipment installation space are square, and the cross-sections of the two wastewater treatment spaces furthest from the equipment installation space are rectangular.

[0055] In the AO biochemical treatment device, the two sewage treatment spaces with square cross-sections are a primary anoxic tank and a biochemical sedimentation tank, respectively. In the two sewage treatment spaces with rectangular cross-sections, the one adjacent to the primary anoxic tank is a primary aerobic tank, and the one adjacent to the biochemical sedimentation tank is a secondary aerobic tank.

[0056] The secondary aerobic tank is separated from the primary aerobic tank by a partition at the end away from the biological sedimentation tank, forming a secondary anoxic tank adjacent to the primary aerobic tank.

[0057] The equipment installation space of the AO biochemical treatment device is equipped with a biochemical treatment dosing system, a blower, a second sludge return pump, a nitrification liquid return pump, and a biochemical treatment power distribution control cabinet.

[0058] More preferably, the primary anoxic tank, the primary aerobic tank, the secondary anoxic tank, the secondary aerobic tank, and the biochemical sedimentation tank are connected in sequence;

[0059] The AO biochemical treatment device is equipped with a third inlet, a third outlet, and a sludge discharge outlet on its outer side. The third inlet is connected to the second outlet of the chemical destabilizing and high-efficiency oxidation device, and the device contains microbial activated sludge.

[0060] The primary anoxic tank is equipped with a mixer, which is connected to the third inlet and has an inlet flow meter. It is connected to the second sludge return pump and the nitrification liquid return pump through pipelines, and each of them is equipped with a flow meter.

[0061] The bottom of the primary aerobic tank is equipped with an aeration device, which is supplied with air by the blower. It contains a fixed bed flat packing material and is connected to the primary anoxic tank.

[0062] The secondary anoxic tank is equipped with a mixer and is connected to the primary aerobic tank.

[0063] The bottom of the secondary aerobic tank is equipped with an aeration device, which is supplied with air by the blower. It contains a fixed bed flat packing material and is connected to the secondary anoxic tank in sequence.

[0064] The biochemical sedimentation tank is used for solid-liquid separation, and its bottom is connected to the second sludge return pump to the first-stage anoxic tank.

[0065] More preferably, the biochemical treatment dosing system is a compound nutrient dosing system, which is connected to the primary anoxic tank and the secondary anoxic tank.

[0066] The beneficial effects of this utility model are:

[0067] This invention's high-volume-load aerobic device maintains a high activated sludge concentration and adds a multi-component composite regulator to optimize the sludge floc structure and settling performance, enabling the system to maintain good mass transfer and biochemical reaction characteristics even under high-volume-load conditions. Simultaneously, an enhanced regeneration method is employed in the sludge regeneration tank, significantly improving the adsorption and biodegradation activity of the activated sludge. As a result, the aerobic reaction unit can achieve a pollutant removal load of 2.0~3.0 kgCOD / m³·d, a significant improvement in efficiency compared to traditional aerobic activated sludge systems, while effectively reducing the volume of treatment structures, lowering land occupation, and reducing investment costs.

[0068] This invention relates to a chemical destabilizing and high-efficiency oxidation device. By adding a chemical destabilizing agent, colloidal and emulsified organic pollutants, as well as some dissolved organic matter in wastewater, are decomposed and destabilized, causing a sharp decrease in their solubility. These pollutants then precipitate and precipitate from the aqueous phase, forming amorphous or semi-crystalline solids. Separating these high-concentration organic compounds from the wastewater facilitates wastewater treatment, creating a reaction interface that can be efficiently processed by subsequent oxidation systems. Simultaneously, the separated organic matter can be reused as a resource. Under adjusted system conditions, a composite oxidant is introduced. Based on this, highly active oxidizing substances are generated in situ through efficient oxidation, deeply breaking down, oxidizing, and mineralizing polycyclic aromatic hydrocarbons and other recalcitrant organic matter in the wastewater. During the reaction process, technical means are used to precisely control the degree of pollutant decomposition, significantly improving the biodegradability of the wastewater and creating more favorable influent conditions for the efficient and stable operation of subsequent biological systems.

[0069] This invention utilizes a high-volume-load aerobic device to remove a large amount of COD, a chemical destabilizing and high-efficiency oxidation device to remove recalcitrant substances, improve the biodegradability of wastewater, and reduce its biotoxicity, and an AO biological treatment device for deep treatment and degradation of remaining COD and ammonia nitrogen. All of these methods involve low reagent dosage, minimal sludge production, and low wastewater treatment costs.

[0070] This utility model is manufactured as a whole in the form of equipment modules, avoiding complex on-site civil engineering and pipeline construction. It achieves standardized design, factory processing, and pre-assembly production, significantly shortening the installation and commissioning cycle and improving project delivery speed. All functional components are centrally located, with pipelines, electrical systems, and control systems integrated within the equipment frame, facilitating daily operation and maintenance and reducing labor and time costs required for operation and maintenance. Equipment integration reduces the volume and footprint of structures, lowers civil engineering investment, and saves site resources, making it particularly suitable for space-constrained enterprises or industrial parks.

[0071] The following will further explain the concept, specific structure and technical effects of this utility model in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of this utility model. Attached Figure Description

[0072] Figure 1 This diagram shows a cross-sectional view of a high-volume-load aerobic device according to an embodiment of the present invention.

[0073] Figure 2 The diagram shows a cross-sectional view of a chemically destabilized and highly efficient oxidation device in one embodiment of the present invention.

[0074] Figure 3 This diagram shows a cross-sectional view of the AO biochemical treatment device in one embodiment of the present invention. Detailed Implementation

[0075] Example 1: As Figures 1 to 3 As shown, the integrated enhanced treatment device for semi-coke wastewater includes a high-volume load aerobic device 100 with the same cross-section and all of them being rectangular box structures, a chemical destabilizing and high-efficiency oxidation device 200, and an AO biochemical treatment device 300.

[0076] The length-to-width ratio of the cross-section of all the rectangular box structures is 2:1, and each is divided into several accommodating cavities by several partitions;

[0077] All of the partitions are arranged parallel or perpendicular to the sidewalls of the corresponding rectangular box structure;

[0078] Each of the multiple accommodating cavities in each of the rectangular box structures includes an equipment installation space for setting up supporting equipment;

[0079] The cross-sections of the equipment installation spaces of the high-volume load aerobic device 100, the chemical destabilizing high-efficiency oxidation device 200, and the AO biochemical treatment device 300 are all the same, all located at the same end of the length direction of the corresponding rectangular box structure, and all occupy 1 / 4 of the length.

[0080] In each of the rectangular box structure's plurality of accommodating cavities, apart from the equipment installation space, all remaining accommodating cavities are wastewater treatment spaces used for water treatment.

[0081] In some embodiments, the high-volume-load aerobic device 100, excluding the corresponding equipment installation space, is divided into four wastewater treatment spaces by a transverse partition and a longitudinal partition;

[0082] The four wastewater treatment spaces of the high-volume-load aerobic device 100 are arranged in a rectangular row and column in cross-section. The cross-sections of the two wastewater treatment spaces closest to the corresponding equipment installation space are square, and the cross-sections of the two wastewater treatment spaces far from the equipment installation space are rectangular.

[0083] In the high-volume-load aerobic device 100, the two sewage treatment spaces with square cross-sections are a sludge regeneration tank 110 and a sedimentation tank 130, respectively. The high-load aerobic tank 120 is adjacent to the sludge regeneration tank 110 in the two sewage treatment spaces with rectangular cross-sections.

[0084] The high-volume-load aerobic device 100 is equipped with an aerobic dosing device 140, an aerobic device power control cabinet 160, an aeration blower 151, and a first sludge return pump 152 in the equipment installation space.

[0085] In some embodiments, the high-volume-load aerobic device 100 is provided with a first inlet 101, a first outlet 102 and a first vent 103 on its outer side;

[0086] External sewage enters through the first inlet 101;

[0087] The first inlet 101 is connected to the top of the high-load aerobic tank 120 via a pipe and is equipped with a flow meter for measurement;

[0088] The top of the sludge regeneration tank 110 and the high-load aerobic tank 120 are connected by an opening;

[0089] The high-load aerobic tank 120 and the top of the sedimentation tank 130 are connected by a pipe;

[0090] Both the sludge regeneration tank 110 and the high-load aerobic tank 120 are equipped with aeration pipes at the bottom.

[0091] The high-load aerobic tank 120 is equipped with domesticated aerobic microorganisms, and the attachment and growth ability and shock resistance of the aerobic microorganisms are enhanced by adding a compound biological modifier.

[0092] The composite biomodifier includes a porous adsorption matrix, a microporous biocarrier, iron-based responsive particles, an alkaline coagulant aid, and a cationic polymer.

[0093] The sedimentation tank 130 is equipped with a sludge hopper at the bottom and is connected to the top of the sludge regeneration tank 110 via a pipe including a first sludge return pump 152.

[0094] In practical applications, the addition of compound biological modifiers enhances the attachment and growth ability and shock resistance of microorganisms, enabling continuous and efficient degradation of organic pollutants under high volumetric load conditions.

[0095] In some embodiments, the aerobic dosing device 140 includes a biological modifier dosing system and a nutrient dosing system;

[0096] The biological modifier dosing system adds the biological modifier to the high-load aerobic tank 120;

[0097] The nutrient dosing system adds nutrients to the sludge regeneration tank 110;

[0098] The aerobic device power distribution control cabinet 160 is used for the power supply and distribution and system control of the high volumetric load aerobic device 100;

[0099] The aeration blower 151 and the first sludge return pump 152 are used for supplying air to the aerobic process and promoting sludge circulation, respectively.

[0100] In practical applications, the aerobic device power distribution control cabinet 160 centrally controls the start-up, shutdown, and operating parameters of each electrical device within the high-volume-load aerobic device 100, ensuring the stable and efficient operation of the high-volume-load aerobic device 100. By optimizing the hydraulic flow pattern and microbial metabolic environment, the high-volume-load aerobic device 100 significantly improves organic matter removal efficiency and system shock resistance.

[0101] In some embodiments, the chemical destabilizing high-efficiency oxidation device 200, excluding the corresponding equipment installation space, is divided into six wastewater treatment spaces by two transverse partitions and one longitudinal partition;

[0102] The six wastewater treatment spaces of the chemical destabilizing high-efficiency oxidation device 200 are arranged in a rectangular row of two rows and three columns in cross-section, and each cross-section is square.

[0103] Of the six wastewater treatment spaces in the chemical destabilizing high-efficiency oxidation device 200, the three wastewater treatment spaces in one row, starting from the wastewater treatment space adjacent to the corresponding equipment installation space, are sequentially a first sedimentation tank 220, a high-efficiency oxidation reaction tank 230, and a coagulation tank 240; the three wastewater treatment spaces in the other row, starting from the wastewater treatment space adjacent to the corresponding equipment installation space, are sequentially a clear water tank 270, a second sedimentation tank 260, and a flocculation tank 250.

[0104] Within the first sedimentation tank 220, a chemical destabilizing tank 210 is provided at the angle between the side wall adjacent to the corresponding equipment installation space and the outer wall.

[0105] The equipment installation space of the chemical destabilizing high-efficiency oxidation device 200 is equipped with a chemical destabilizing dosing system 280, a first sludge discharge pump 291, a second sludge discharge pump 292, a clean water lift pump 293, and a chemical destabilizing power distribution control cabinet 294.

[0106] In some embodiments, the chemical destabilizing tank 210, the first sedimentation tank 220, the high-efficiency oxidation reaction tank 230, the coagulation tank 240, the flocculation tank 250, the second sedimentation tank 260, and the clear water tank 270 are connected in sequence;

[0107] The chemical destabilizing high-efficiency oxidation device 200 is provided with a second water inlet 201, a second water outlet 202 and a second vent 203 on its outer side;

[0108] The chemical destabilizing tank 210 is connected to the first inlet 101 of the high volumetric load aerobic device 100 through the second inlet 201, and is equipped with a mixer and a condition control linkage dosing system inside.

[0109] The first sedimentation tank 220 is connected to the first sludge pump 291 and is connected to the top of the chemical destabilizing tank 210 via a pipe, and is equipped with a sludge hopper at the bottom;

[0110] The high-efficiency oxidation reaction tank 230 carries out high-efficiency oxidation reaction, is connected to the top of the first sedimentation tank 220, and is equipped with two kinds of composite oxidant dosing ports;

[0111] The coagulation tank 240 is connected to the top of the high-efficiency oxidation reaction tank 230 and is provided with an auxiliary coagulant dosing port;

[0112] The flocculation tank 250 is connected to the top of the coagulation tank 240 and is equipped with a polyacrylamide dosing port.

[0113] The second sedimentation tank 260 is connected to the top of the flocculation tank 250, connected to the second sludge pump 292, connected to the top of the clear water tank 270, and has a sludge hopper at the bottom;

[0114] The clear water tank 270 stores the supernatant and is connected to the clear water lift pump 293 and the second outlet 202.

[0115] The first sludge pump 291 is connected to the bottom of the first sedimentation tank 220 for timed sludge discharge;

[0116] The second sludge pump 292 is connected to the bottom of the second sedimentation tank 260 for timed sludge discharge.

[0117] In some embodiments, the chemical destabilizing dosing system 280 includes a chemical destabilizing agent dosing system, a composite oxidizing agent dosing system, an auxiliary coagulant dosing system, and a polyacrylamide dosing system;

[0118] The chemical destabilizer dosing system adds the chemical destabilizer to the chemical destabilizer tank 210;

[0119] In practical applications, chemical destabilizers are inorganic acidic solutions, typically sulfuric acid.

[0120] The composite oxidant dosing system adds the reagent to the high-efficiency oxidation reaction tank 230;

[0121] The auxiliary coagulant dosing system adds the auxiliary coagulant to the coagulation tank 240;

[0122] The polyacrylamide dosing system adds polyacrylamide to the flocculation tank 250.

[0123] In some embodiments, the AO biochemical treatment device 300, excluding the corresponding equipment installation space, is divided into four wastewater treatment spaces by a transverse partition and a longitudinal partition;

[0124] The four wastewater treatment spaces of the AO biochemical treatment device 300 are arranged in a rectangular row and column in cross-section. The cross-sections of the two wastewater treatment spaces closest to the corresponding equipment installation space are square, and the cross-sections of the two wastewater treatment spaces far from the equipment installation space are rectangular.

[0125] In the AO biochemical treatment device 300, the two sewage treatment spaces with square cross-sections are a primary anoxic tank 310 and a biochemical sedimentation tank 350, respectively. In the two sewage treatment spaces with rectangular cross-sections, the one adjacent to the primary anoxic tank 310 is a primary aerobic tank 320, and the one adjacent to the biochemical sedimentation tank 350 is a secondary aerobic tank 340.

[0126] The secondary aerobic tank 340 is separated from the primary aerobic tank 320 by a partition at the end away from the biochemical sedimentation tank 350, forming a secondary anoxic tank 330.

[0127] The equipment installation space of the AO biochemical treatment device 300 is equipped with a biochemical treatment dosing system 360, a blower 371, a second sludge return pump 372, a nitrification liquid return pump 273, and a biochemical treatment power distribution control cabinet 380.

[0128] In some embodiments, the primary anoxic tank 310, the primary aerobic tank 320, the secondary anoxic tank 330, the secondary aerobic tank 340, and the biochemical sedimentation tank 350 are connected in sequence;

[0129] The AO biochemical treatment device 300 is provided with a third inlet 301, a third outlet 302 and a sludge discharge outlet 303 on the outside. The third inlet 301 is connected to the second outlet 202 of the chemical destabilizing high-efficiency oxidation device 200, and microbial activated sludge is provided inside.

[0130] The primary anoxic tank 310 is equipped with a mixer, which is connected to the third inlet 301 and has an inlet flow meter. It is connected to the second sludge return pump 372 and the nitrification liquid return pump 273 through pipelines, and both are equipped with flow meters.

[0131] The bottom of the primary aerobic tank 320 is equipped with an aeration device, which is supplied with air by the blower 371. It is equipped with a fixed bed flat packing material and is connected to the primary anoxic tank 310.

[0132] The secondary anoxic tank 330 is equipped with a mixer and is connected to the primary aerobic tank 320;

[0133] The bottom of the secondary aerobic tank 340 is equipped with an aeration device, which is supplied with air by the blower 371. It is equipped with fixed bed flat packing material and is connected to the secondary anoxic tank 330 in sequence.

[0134] The biochemical sedimentation tank 350 is used for solid-liquid separation, and its bottom is connected to the second sludge return pump 372 to the first-stage anoxic tank 310.

[0135] In some embodiments, the biochemical treatment dosing system 360 is a compound nutrient dosing system, which is connected to the primary anoxic tank 310 and the secondary anoxic tank 330.

[0136] Example 2: The device of this invention was applied to the wastewater of a semi-coke wastewater plant. The wastewater was treated using the method of this invention. After phenol and ammonia recovery, the semi-coke wastewater was treated by the device of this invention, which then passed through a high-volume load aerobic device, a chemical destabilization and high-efficiency oxidation device, and an AO biochemical treatment device.

[0137] COD of influent Cr The concentrations of COD and ammonia nitrogen in the effluent are 4000 mg / L to 5000 mg / L, NH3-N is 300 mg / L to 500 mg / L, and total phenols are 500 mg / L to 1000 mg / L. After using this device, the effluent COD is <100 mg / L and ammonia nitrogen is <5 mg / L; in the high-volume-load aerobic device, the COD removal load can reach 2.0 kgCOD / m³. 3 • up to 3.0 kg COD / m 3 •d. The equipment requires less investment, occupies approximately 30% less space than traditional processes, reduces reagent and operating costs by approximately 20%, and provides stable effluent quality.

[0138] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A combined device for integrated enhanced treatment of green liquor wastewater; characterized in that, It includes a high-volume load aerobic device (100) with the same cross-section and all of them being rectangular box structures, a chemical destabilization and high-efficiency oxidation device (200), and an AO biochemical treatment device (300). The length-to-width ratio of the cross-section of all the rectangular box structures is 2:1, and each is divided into several accommodating cavities by several partitions; All of the partitions are arranged parallel or perpendicular to the sidewalls of the corresponding rectangular box structure; Each of the multiple accommodating cavities in each of the rectangular box structures includes an equipment installation space for setting up supporting equipment; The cross-sections of the equipment installation spaces of the high-volume load aerobic device (100), the chemical destabilizing high-efficiency oxidation device (200), and the AO biochemical treatment device (300) are all the same, all located at the same end of the length direction of the corresponding rectangular box structure, and all occupy 1 / 4 of the length. In each of the rectangular box structure's plurality of accommodating cavities, apart from the equipment installation space, all remaining accommodating cavities are wastewater treatment spaces used for water treatment.

2. The integrated enhanced treatment device for semi-coke wastewater according to claim 1, characterized in that, The high-volume-load aerobic device (100), excluding the corresponding equipment installation space, is divided into four wastewater treatment spaces by a horizontal partition and a vertical partition; The four wastewater treatment spaces of the high volumetric load aerobic device (100) are arranged in a rectangular row and column in cross-section. The cross-sections of the two wastewater treatment spaces closest to the corresponding equipment installation space are square, and the cross-sections of the two wastewater treatment spaces far from the equipment installation space are rectangular. In the high volumetric load aerobic device (100), the two sewage treatment spaces with square cross-sections are a sludge regeneration tank (110) and a sedimentation tank (130), and the high load aerobic tank (120) is adjacent to the sludge regeneration tank (110) in the two sewage treatment spaces with rectangular cross-sections. The high volumetric load aerobic device (100) is equipped with an aerobic dosing device (140), an aerobic device power control cabinet (160), an aeration blower (151), and a first sludge return pump (152) in the equipment installation space.

3. The integrated enhanced treatment device for semi-coke wastewater according to claim 2, characterized in that, The high volumetric load aerobic device (100) is provided with a first inlet (101), a first outlet (102) and a first vent (103) on its outer side. External sewage enters through the first inlet (101); The first inlet (101) is connected to the top of the high-load aerobic tank (120) via a pipe and is equipped with a flow meter for measurement; The top of the sludge regeneration tank (110) and the high-load aerobic tank (120) are connected by an opening; The top of the high-load aerobic tank (120) and the sedimentation tank (130) are connected by a pipe; Both the sludge regeneration tank (110) and the high-load aerobic tank (120) are equipped with aeration pipes at the bottom. The high-load aerobic tank (120) is equipped with domesticated aerobic microorganisms, and the attachment and growth ability and shock resistance of the aerobic microorganisms are enhanced by adding a compound biological modifier. The composite biomodifier includes a porous adsorption matrix, a microporous biocarrier, iron-based responsive particles, an alkaline coagulant aid, and a cationic polymer. The sedimentation tank (130) is equipped with a sludge hopper at the bottom and is connected to the top of the sludge regeneration tank (110) via a pipe including a first sludge return pump (152).

4. The integrated enhanced treatment device for semi-coke wastewater according to claim 2, characterized in that, The aerobic dosing device (140) includes a biological modifier dosing system and a nutrient dosing system; The biological modifier dosing system adds the biological modifier to the high-load aerobic tank (120). The nutrient dosing system adds nutrients to the sludge regeneration tank (110). The aerobic device power distribution control cabinet (160) is used for the power supply and distribution and system control of the high volumetric load aerobic device (100); The aeration blower (151) and the first sludge return pump (152) are used for supplying air to the aerobic process and promoting sludge circulation, respectively.

5. The integrated enhanced treatment device for semi-coke wastewater according to claim 1, characterized in that, The chemical destabilizing high-efficiency oxidation device (200), excluding the corresponding equipment installation space, is divided into six wastewater treatment spaces by two transverse partitions and one longitudinal partition. The six wastewater treatment spaces of the chemical destabilizing high-efficiency oxidation device (200) are arranged in a rectangular row of two rows and three columns in cross-section, and each cross-section is square. Of the six wastewater treatment spaces in the chemical destabilizing high-efficiency oxidation device (200), the three wastewater treatment spaces in one row, starting from the wastewater treatment space adjacent to the corresponding equipment installation space, are sequentially a first sedimentation tank (220), a high-efficiency oxidation reaction tank (230), and a coagulation tank (240); the three wastewater treatment spaces in the other row, starting from the wastewater treatment space adjacent to the corresponding equipment installation space, are sequentially a clear water tank (270), a second sedimentation tank (260), and a flocculation tank (250). Within the first sedimentation tank (220), a chemical destabilizing tank (210) is provided at the angle between the side wall adjacent to the corresponding equipment installation space and the outer wall. The equipment installation space of the chemical destabilizing high-efficiency oxidation device (200) is equipped with a chemical destabilizing dosing system (280), a first sludge pump (291), a second sludge pump (292), a clean water lift pump (293), and a chemical destabilizing power distribution control cabinet (294).

6. The integrated combined device for enhanced treatment of semi-coke wastewater according to claim 5, characterized in that, The chemical destabilization tank (210), the first sedimentation tank (220), the high-efficiency oxidation reaction tank (230), the coagulation tank (240), the flocculation tank (250), the second sedimentation tank (260), and the clear water tank (270) are connected in sequence; The chemical destabilizing high-efficiency oxidation device (200) is provided with a second water inlet (201), a second water outlet (202), and a second vent (203) on its outer side. The chemical destabilization tank (210) is connected to the first inlet (101) of the high-volume load aerobic device (100) through the second inlet (201), and is equipped with a mixer and a condition-controlled linkage dosing system inside; The first sedimentation tank (220) is connected to the first sludge pump (291) and is connected to the top of the chemical destabilization tank (210) via a pipe, and is equipped with a sludge hopper at the bottom; The high-efficiency oxidation reaction tank (230) carries out high-efficiency oxidation reaction, is connected to the top of the first sedimentation tank (220), and is equipped with two kinds of composite oxidant dosing ports; The coagulation tank (240) is connected to the top of the high-efficiency oxidation reaction tank (230) and is provided with an auxiliary coagulant dosing port; The flocculation tank (250) is connected to the top of the coagulation tank (240) and is equipped with a polyacrylamide dosing port; The second sedimentation tank (260) is connected to the top of the flocculation tank (250), connected to the second sludge pump (292), connected to the top of the clear water tank (270), and has a sludge hopper at the bottom; The clear water tank (270) stores the supernatant and is connected to the clear water booster pump (293) and the second outlet (202); The first sludge pump (291) is connected to the bottom of the first sedimentation tank (220) for timed sludge discharge; The second sludge pump (292) is connected to the bottom of the second sedimentation tank (260) for timed sludge discharge.

7. The integrated enhanced treatment device for semi-coke wastewater according to claim 5, characterized in that, The chemical destabilizing agent dosing system (280) includes a chemical destabilizing agent dosing system, a composite oxidizing agent dosing system, an auxiliary coagulant dosing system, and a polyacrylamide dosing system; The chemical destabilizer dosing system adds the chemical destabilizer to the chemical destabilization tank (210). The composite oxidant dosing system adds the reagent to the high-efficiency oxidation reaction tank (230). The auxiliary coagulant dosing system adds the auxiliary coagulant to the coagulation tank (240). The polyacrylamide dosing system adds polyacrylamide to the flocculation tank (250).

8. The integrated combined device for enhanced treatment of semi-coke wastewater according to claim 1, characterized in that, The AO biochemical treatment device (300), excluding the corresponding equipment installation space, is divided into four wastewater treatment spaces by a horizontal partition and a vertical partition. The four wastewater treatment spaces of the AO biochemical treatment device (300) are arranged in a rectangular row and column in cross-section. The cross-sections of the two wastewater treatment spaces closest to the corresponding equipment installation space are square, and the cross-sections of the two wastewater treatment spaces far from the equipment installation space are rectangular. In the AO biochemical treatment device (300), the two sewage treatment spaces with square cross-sections are a primary anoxic tank (310) and a biochemical sedimentation tank (350), respectively. In the two sewage treatment spaces with rectangular cross-sections, the one adjacent to the primary anoxic tank (310) is a primary aerobic tank (320), and the one adjacent to the biochemical sedimentation tank (350) is a secondary aerobic tank (340). The secondary aerobic tank (340) is separated from the primary aerobic tank (320) by a partition at the end away from the biological sedimentation tank (350) by a partition. The equipment installation space of the AO biochemical treatment device (300) is equipped with a biochemical treatment dosing system (360), a blower (371), a second sludge return pump (372), a nitrification liquid return pump (273), and a biochemical treatment power distribution control cabinet (380).

9. The integrated combined device for enhanced treatment of semi-coke wastewater according to claim 8, characterized in that, The primary anoxic tank (310), the primary aerobic tank (320), the secondary anoxic tank (330), the secondary aerobic tank (340), and the biochemical sedimentation tank (350) are connected in sequence; The AO biochemical treatment device (300) is provided with a third inlet (301), a third outlet (302) and a sludge discharge outlet (303) on the outside. The third inlet (301) is connected to the second outlet (202) of the chemical destabilizing high-efficiency oxidation device (200), and is equipped with microbial activated sludge. The primary anoxic tank (310) is equipped with a mixer, which is connected to the third inlet (301) and has an inlet flow meter. It is connected to the second sludge return pump (372) and the nitrification liquid return pump (273) through pipelines, and both are equipped with flow meters. The first-stage aerobic tank (320) is equipped with an aeration device at the bottom, which is supplied with air by the blower (371). It is equipped with fixed bed flat packing material and is connected to the first-stage anoxic tank (310). The secondary anoxic tank (330) is equipped with a mixer and is connected to the primary aerobic tank (320); The bottom of the secondary aerobic tank (340) is equipped with an aeration device, which is supplied with air by the blower (371). It is equipped with fixed bed flat packing material and is connected to the secondary anoxic tank (330) in sequence. The biochemical sedimentation tank (350) is used for solid-liquid separation, and its bottom is connected to the first-stage anoxic tank (310) via the second sludge return pump (372).

10. The integrated combined device for enhanced treatment of semi-coke wastewater according to claim 8, characterized in that, The biochemical treatment dosing system (360) is a compound nutrient dosing system, which is connected to the primary anoxic tank (310) and the secondary anoxic tank (330).

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