Cooperative advanced treatment system for multiple pollutants in industrial wastewater

Abstract

The utility model relates to the technical field of wastewater deep equipment, and mainly discloses a collaborative deep treatment system for multiple pollutants in industrial wastewater. Comprising a regulating tank, a catalytic mixing reactor, a catalytic reaction tank, a primary neutralization reaction tank, a defluorination reaction tank, a secondary neutralization reaction tank, an enhanced adsorption reaction tank, a flocculation reaction tank, a sedimentation tank, a deep oxidation reaction tank, a filter tank and a clean water tank which are sequentially connected, and each reaction tank is provided with a corresponding feeding system; the system also comprises an on-line detection system and a central control system, can synchronously realize collaborative removal of various pollutants and high integration of the system, and can timely adjust operation parameters and realize automatic operation of the system according to changes of water quality and water quantity by virtue of response coordination of the on-line detection system and the central control system. The advanced treatment requirements of wastewater with different water qualities are met while the treatment cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater deep treatment equipment, in particular to a system for coordinated deep treatment of multiple pollutants in industrial wastewater. Background Art

[0002] In order to meet higher emission standards, the upgrading and transformation of wastewater treatment plants is imminent, and the coordinated deep treatment of multiple pollutants is an inevitable requirement for the green and low-carbon operation of wastewater treatment plants and the sustainable development of industrial enterprises.

[0003] In the field of deep treatment of industrial wastewater, Fenton oxidation is widely used for its technical advantages of high removal rate, but conventional Fenton technology has problems such as large dosage of reagents and large amount of sludge production. At the same time, Fenton technology is not effective in removing nitrogen, phosphorus, fluoride and new pollutants in wastewater. In order to remove multiple pollutants at the same time, wastewater treatment plants usually set up multiple treatment processes such as flocculation sedimentation, ion exchange or membrane treatment in series, resulting in long process flow, difficult operation and high treatment costs. The development of green, economical, efficient, safe and stable treatment technology has become a widespread demand in the field of deep treatment of industrial wastewater. Utility Model Content

[0004] The purpose of the utility model is to provide a system for the coordinated deep treatment of multiple pollutants in industrial wastewater, which solves the technical problems existing in the prior art. Through the mutual coupling of Fenton oxidation and complex defluorination, combined with subsequent enhanced adsorption, ammonia nitrogen oxidation and new pollutant treatment, multiple pollutants can be removed simultaneously. The system is highly integrated and relies on the response coordination of the online detection system and the central control system. It can adjust the operating parameters in time according to the changes in water quality and water quantity, realize the automatic operation of the system, reduce the treatment cost and meet the deep treatment requirements of wastewater with different water qualities.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a system for the coordinated deep treatment of multiple pollutants in industrial wastewater, comprising a regulating tank, a catalytic mixing reactor, a catalytic reaction tank, a primary neutralization reaction tank, a defluorination reaction tank, a secondary neutralization reaction tank, an enhanced adsorption reaction tank, a flocculation reaction tank, a sedimentation tank, a deep oxidation reaction tank, a filtration tank and a clear water tank connected in sequence; the catalytic reaction tank, the primary neutralization reaction tank, the secondary neutralization reaction tank and the filtration tank are all connected to a reagent dosing system; the catalytic reaction tank, the primary neutralization reaction tank, the defluorination reaction tank, the secondary neutralization reaction tank, the enhanced adsorption reaction tank, the flocculation reaction tank, and the deep oxidation reaction tank are all provided with a stirrer; the catalytic reaction The bottoms of the tank, the primary neutralization reaction tank, and the secondary neutralization reaction tank are respectively provided with a catalytic reaction tank aeration system, a primary neutralization reaction tank aeration system, and a secondary neutralization reaction tank aeration system; the catalytic mixing reactor is also connected to a hydrochloric acid storage and dosing system, a ferrous salt preparation and dosing system, and a hydrogen peroxide storage and dosing system, respectively; the primary neutralization reaction tank and the secondary neutralization reaction tank are both connected to a calcium hydroxide preparation and dosing system, the defluorination reaction tank is also connected to a defluorination agent storage and dosing system, the enhanced adsorption reaction tank is also connected to an activated carbon powder preparation and dosing system, the flocculation reaction tank is also connected to a PAM preparation and dosing system, and the deep oxidation reaction tank is also connected to a denitrification agent storage and dosing system.

[0006] A further solution of the utility model is that a lifting pump is arranged between the regulating tank and the catalytic mixing reaction tank, and the top of the upper tank and the bottom of the lower tank in the catalytic reaction tank, the primary neutralization reaction tank, the defluorination reaction tank, the secondary neutralization reaction tank, the enhanced adsorption reaction tank, the flocculation reaction tank, the sedimentation tank and the deep oxidation reaction tank are connected by a pipeline.

[0007] A further solution of the utility model is that the bottom of the sedimentation tank is connected to the sludge dewatering system, and a sludge pump is provided between the bottom of the sedimentation tank and the sludge dewatering system.

[0008] A further solution of the utility model is that a permanent magnet is arranged in the catalytic mixing reactor to form a magnetic field, and the permanent magnet includes two permanent magnets, which are respectively arranged on two corresponding side walls in the catalytic mixing reactor.

[0009] A further solution of the utility model is that a system for coordinated deep treatment of multiple pollutants in industrial wastewater also includes an online detection system and a central control system. The online detection system and the central control system are electrically connected for communication. The central control system is also electrically connected for communication with a hydrochloric acid storage and dosing system, a ferrous salt preparation and dosing system, a hydrogen peroxide storage and dosing system, a calcium hydroxide preparation and dosing system, a defluorination agent storage and dosing system, an activated carbon powder preparation and dosing system, a PAM preparation and dosing system, and a denitrification agent storage and dosing system. The online detection system is respectively arranged in the catalytic mixing reactor, the primary neutralization reaction tank, the secondary neutralization reaction tank, the sedimentation tank, and the clear water tank.

[0010] A further solution of the utility model is that the online detection system includes one or more of the COD, ammonia nitrogen, total nitrogen, total phosphorus, fluoride and pH detection systems respectively arranged in each cell body.

[0011] A further solution of the utility model is that the aeration system of the catalytic reaction tank, the aeration system of the primary neutralization reaction tank and the aeration system of the secondary neutralization reaction tank are connected to the air compression system through pipelines.

[0012] A further solution of the utility model is that the chemicals added by the chemical dosing system include but are not limited to one or more of flocculants, coagulants, defoaming agents and pH adjusters.

[0013] A further solution of the utility model is that the defluorinating agent added by the defluorinating agent storage and addition system is one or more of aluminum-containing or iron-containing agents, wherein the aluminum-containing agent can be aluminum sulfate, polyaluminum chloride, and the like.

[0014] A further solution of the utility model is that the denitrifier added by the denitrifier storage and addition system is one or more agents that are oxidizing to nitrogen-containing compounds, and the agent that is oxidizing to nitrogen-containing compounds can be sodium hypochlorite.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The magnetic field set in the catalytic mixing reactor greatly improves the efficiency of hydroxyl radical generation, while promoting the partial oxidation of bound fluorides by Fenton oxidation, further promoting the subsequent deep removal of fluorides;

[0017] 2. Through two-stage neutralization reaction, the pH is precisely controlled for complex defluorination, which can couple Fenton oxidation and defluorination, improve the adsorption and complexation of fluoride by carboxylic acid metal salts, achieve the synergistic removal of organic pollutants and fluorine-containing pollutants in wastewater, reduce reagent consumption, and improve treatment efficiency;

[0018] 3. Through the combined effect of enhanced adsorption of powdered activated carbon and subsequent deep oxidation, low-concentration residual organic matter and trace new pollutants in wastewater can be effectively removed. At the same time, the oxidative denitrifier can remove trace ammonia nitrogen that has not been effectively treated after biochemical treatment, achieving the purpose of synergistic removal of multiple pollutants;

[0019] 4. The overall system of the utility model can realize unattended and self-controlled operation through automatic detection and control, greatly improving the accuracy of collaborative processing and reducing processing costs.

[0020] The utility model proposes a system for coordinated deep treatment of multiple pollutants in industrial wastewater, which can effectively remove soluble organic matter, nitrogen and phosphorus, suspended solids, chromaticity, fluoride and new pollutants in the biochemical treatment effluent of the wastewater treatment plant, and can realize unattended automatic operation through an online detection system and a central control system. It is a green, low-carbon, stable and efficient enhanced deep treatment system, and has broad application prospects in the deep treatment of wastewater treatment plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0023] In the figure: 1. regulating tank; 2. lifting pump; 3. catalytic mixing reactor; 4. catalytic reaction tank; 5. primary neutralization reaction tank; 6. defluorination reaction tank; 7. secondary neutralization reaction tank; 8. enhanced adsorption reaction tank; 9. flocculation reaction tank; 10. sedimentation tank; 11. deep oxidation reaction tank; 12. filtration tank; 13. clear water tank; 14. sludge pump; 15. sludge dewatering system; 16. hydrochloric acid storage and dosing system; 17. ferrous salt preparation and dosing system; 18. peroxide Hydrogen storage and dosing system; 19. Calcium hydroxide preparation and dosing system; 20. Defluorination agent storage and dosing system; 21. Activated carbon powder preparation and dosing system; 22. PAM preparation and dosing system; 23. Denitrification agent storage and dosing system; 24. Agent dosing system; 26. Central control system; 251 online detection system; 301. Permanent magnet; 401; Catalytic reaction tank aeration system; 501. Primary neutralization reaction tank aeration system; 701. Secondary neutralization reaction tank aeration system. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example 1

[0026] like Figure 1 As shown, a system for coordinated deep treatment of multiple pollutants in industrial wastewater includes a regulating tank 1, a catalytic mixing reactor 3, a catalytic reaction tank 4, a primary neutralization reaction tank 5, a defluorination reaction tank 6, a secondary neutralization reaction tank 7, an enhanced adsorption reaction tank 8, a flocculation reaction tank 9, a sedimentation tank 10, a deep oxidation reaction tank 11, a filtration tank 12 and a clear water tank 13, which are connected in sequence.

[0027] Agitators are provided inside the catalytic reaction tank 4, the primary neutralization reaction tank 5, the defluorination reaction tank 6, the secondary neutralization reaction tank 7, the enhanced adsorption reaction tank 8, the flocculation reaction tank 9, and the deep oxidation reaction tank 11. A catalytic reaction tank aeration system 401, a primary neutralization reaction tank aeration system 501, and a secondary neutralization reaction tank aeration system 701 are provided at the bottom of the catalytic reaction tank 4, the primary neutralization reaction tank 5, and the secondary neutralization reaction tank 7, respectively. The catalytic reaction tank aeration system 401, the primary neutralization reaction tank aeration system 501, and the secondary neutralization reaction tank aeration system 701 are connected to the air compression system through pipelines.

[0028] The catalytic reaction tank 4 , the primary neutralization reaction tank 5 , the secondary neutralization reaction tank 7 and the filtration tank 12 are all connected to the reagent dosing system 24 .

[0029] The catalytic mixing reactor 3 is also connected to the hydrochloric acid storage and dosing system 16, the ferrous salt preparation and dosing system 17, and the hydrogen peroxide storage and dosing system 18 respectively.

[0030] The primary neutralization reaction tank 5 and the secondary neutralization reaction tank 7 are both connected to the calcium hydroxide preparation and addition system 19, the defluorination reaction tank 6 is also connected to the defluorination agent storage and addition system 20, the enhanced adsorption reaction tank 8 is also connected to the activated carbon powder configuration and addition system 21, the flocculation reaction tank 9 is also connected to the PAM preparation and addition system 22, and the deep oxidation reaction tank 11 is also connected to the denitrification agent storage and addition system 23. Each addition system is connected to each reaction tank through a pipeline, and each pipeline is provided with a pump. The structure and principle of each addition system are all prior art, which does not belong to the content to be protected by this patent and will not be described in this patent.

[0031] A lifting pump 2 is arranged between the regulating tank 1 and the catalytic mixing reaction tank. In the catalytic reaction tank 4, the primary neutralization reaction tank 5, the defluorination reaction tank 6, the secondary neutralization reaction tank 7, the enhanced adsorption reaction tank 8, the flocculation reaction tank 9, the sedimentation tank 10 and the deep oxidation reaction tank 11, the top of the upper tank is connected to the bottom of the lower tank by a pipeline.

[0032] The bottom of the sedimentation tank 10 is connected to a sludge dewatering system 15 , and a sludge pump 14 is provided between the bottom of the sedimentation tank 10 and the sludge dewatering system 15 .

[0033] A permanent magnet 301 is arranged in the catalytic mixing reactor 3 to form a magnetic field. The permanent magnet 301 is a neodymium iron boron permanent magnet and includes two of them. The two permanent magnets 301 are respectively arranged on two corresponding side walls in the catalytic mixing reactor 3, and the direction of the magnetic flux lines is designed horizontally from the entrance of the dosing system to the direction away from the entrance.

[0034] The reagents added by the reagent dosing system 24 include but are not limited to one or more of flocculants, coagulants, defoamers and pH adjusters. The defluorinating agent added by the defluorinating agent storage and dosing system 20 is one or more of aluminum-containing or iron-containing agents. Preferably, the aluminum-containing agent can be aluminum sulfate, polyaluminum chloride, etc. The denitrifying agent added by the denitrifying agent storage and dosing system 23 is one or more of the agents that are oxidizing to nitrogen-containing compounds. Preferably, the agent that is oxidizing to nitrogen-containing compounds can be sodium hypochlorite.

[0035] Example 2

[0036] This embodiment is based on the embodiment 1, and the further scheme is that: a system for the coordinated deep treatment of multiple pollutants in industrial wastewater also includes an online detection system 251 and a central control system 26, and the online detection system 251 and the central control system 26 are electrically connected for communication. The central control system 26 is also electrically connected to the pumps of the hydrochloric acid storage and dosing system 16, the ferrous salt preparation and dosing system 17, the hydrogen peroxide storage and dosing system 18, the calcium hydroxide preparation and dosing system 19, the defluorination agent storage and dosing system 20, the activated carbon powder configuration and dosing system 21, the PAM preparation and dosing system 22 and the denitrification agent storage and dosing system 23. The online detection system 251 is respectively arranged in the catalytic mixing reactor 3, the primary neutralization reaction tank 5, the secondary neutralization reaction tank 7, the sedimentation tank 10 and the clear water tank 13.

[0037] The online detection system 251 includes one or more of the COD, ammonia nitrogen, total nitrogen, total phosphorus, fluoride and pH detection systems respectively arranged in each pool body. The structure and principle of each detection system are existing technologies and do not belong to the content to be protected by this patent, and will not be described in this patent.

[0038] How it works:

[0039] When the utility model is used, the effluent from the biochemical treatment of the wastewater treatment plant enters the multi-pollutant coordinated deep treatment system of the utility model through a pipeline, and is lifted by the lifting pump 2 to enter the catalytic mixing reactor 3 after being buffered in the regulating tank 1. Under the control of the central control system 26, in the catalytic mixing reactor 3, hydrochloric acid is added by the hydrochloric acid storage and addition system 16, the ferrous salt preparation and addition system 17, and the hydrogen peroxide storage and addition system 18 to adjust the pH, and the ferrous salt and hydrogen peroxide rapidly undergo Fenton reaction under the action of the magnetic field to produce hydroxyl free radicals to partially oxidize the organic matter in the wastewater, and then enter the catalytic reaction tank 4 to produce carboxylic acid metal salt macromolecules under aeration conditions. In the primary neutralization reaction tank 5, the calcium hydroxide preparation and addition system 19 is used to add calcium hydroxide to adjust the pH of the wastewater to 6, and in the defluorination reaction tank 6, the calcium hydroxide is added by the calcium hydroxide preparation and addition system 19 to adjust the pH of the wastewater to 6. Defluorinating agent is added through the defluorinating agent storage and dosing system 20, and the coupling effect of Fenton and complex defluorination is utilized to purify and remove suspended solids, organic matter, fluoride and some phosphorus-containing pollutants in the wastewater. Subsequently, calcium hydroxide is continuously added through the secondary neutralization reaction tank 7 to adjust the pH to neutral. Powdered activated carbon is added through the activated carbon powder configuration and dosing system 21 in the enhanced adsorption reaction tank 8 to remove residual small molecular organic matter, some nitrogen-containing pollutants and new pollutants through enhanced adsorption. PAM is added through the PAM configuration and dosing system 22 in the flocculation reaction tank 9 to form large particle flocs, and mud and water separation is carried out in the sedimentation tank 10. The sludge enters the sludge dewatering system 15 through the sludge pump 14, and is transported and disposed of after dehydration; the supernatant after the separation of mud and water enters the deep oxidation reaction tank 11 through the pipeline, and the denitrification agent is added through the denitrification agent storage and addition system 23 to further remove the total nitrogen in the wastewater. After filtering in the filter tank 12, the deeply purified water is discharged into the clear water tank 13, which can be reused as reclaimed water or discharged and disposed of. The electrical automatic control systems such as the dosing system, the online detection system 251, the aeration system, and the pump in the system of the utility model are concentrated in the central control system, and can automatically adjust the dosage according to the water quality data fed back by the online detection system 251 to meet the requirements of the automatic operation of the system.

[0040] The utility model can effectively remove various types of pollutants such as suspended solids, chromaticity, soluble organic matter, nitrogen and phosphorus pollutants, fluoride and new pollutants in the biochemical treatment effluent of the wastewater treatment plant. It has high removal efficiency, good treatment effect, simple operation, high integration, and can realize unattended automatic operation through the online detection system 251 and the central control system 26. It is an efficient, stable, integrated and automated multi-pollutant coordinated deep treatment system, and has broad application prospects in wastewater deep treatment.

[0041] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A system for the coordinated deep treatment of multiple pollutants in industrial wastewater, characterized by: The invention comprises a regulating tank (1), a catalytic mixing reactor (3), a catalytic reaction tank (4), a primary neutralization reaction tank (5), a defluorination reaction tank (6), a secondary neutralization reaction tank (7), an enhanced adsorption reaction tank (8), a flocculation reaction tank (9), a sedimentation tank (10), a deep oxidation reaction tank (11), a filtration tank (12) and a clear water tank (13) which are connected in sequence; the catalytic reaction tank (4), the primary neutralization reaction tank (5), the secondary neutralization reaction tank (7) and the filtration tank (12) are all connected to a reagent dosing system (24); the catalytic reaction tank (4), the primary neutralization reaction tank (5), the defluorination reaction tank (6), the secondary neutralization reaction tank (7), the enhanced adsorption reaction tank (8), the flocculation reaction tank (9) and the deep oxidation reaction tank (11) are all provided with a stirrer; the catalytic reaction tank (4), the primary neutralization reaction tank (5), the secondary neutralization reaction tank (7) The bottom of the reaction tank (7) is respectively provided with a catalytic reaction tank aeration system (401), a primary neutralization reaction tank aeration system (501) and a secondary neutralization reaction tank aeration system (701); the catalytic mixing reactor (3) is also connected to a hydrochloric acid storage and addition system (16), a ferrous salt preparation and addition system (17) and a hydrogen peroxide storage and addition system (18); the primary neutralization reaction tank (5) and the secondary neutralization reaction tank (7) are both connected to a calcium hydroxide preparation and addition system (19); the defluorination reaction tank (6) is also connected to a defluorination agent storage and addition system (20); the enhanced adsorption reaction tank (8) is also connected to an activated carbon powder preparation and addition system (21); the flocculation reaction tank (9) is also connected to a PAM preparation and addition system (22); and the deep oxidation reaction tank (11) is also connected to a denitrification agent storage and addition system (23).

2. The system for the coordinated deep treatment of multiple pollutants in industrial wastewater according to claim 1 is characterized by: A lifting pump (2) is arranged between the regulating tank (1) and the catalytic mixing reaction tank. In the catalytic reaction tank (4), the primary neutralization reaction tank (5), the defluorination reaction tank (6), the secondary neutralization reaction tank (7), the enhanced adsorption reaction tank (8), the flocculation reaction tank (9), the sedimentation tank (10) and the deep oxidation reaction tank (11), the top of the upper tank and the bottom of the lower tank are connected by pipelines.

3. The system for the coordinated deep treatment of multiple pollutants in industrial wastewater according to claim 2 is characterized by: The bottom of the sedimentation tank (10) is connected to the sludge dewatering system (15), and a sludge pump (14) is provided between the bottom of the sedimentation tank (10) and the sludge dewatering system (15).

4. The system for the coordinated deep treatment of multiple pollutants in industrial wastewater according to claim 3 is characterized by: A permanent magnet (301) is arranged inside the catalytic mixing reactor (3) to form a magnetic field.

5. A system for the coordinated deep treatment of multiple pollutants in industrial wastewater according to any one of claims 1 to 4, characterized in that: The invention also comprises an online detection system (251) and a central control system (26). The online detection system (251) and the central control system (26) are electrically connected for communication. The central control system (26) is also electrically connected for communication with a hydrochloric acid storage and dosing system (16), a ferrous salt preparation and dosing system (17), a hydrogen peroxide storage and dosing system (18), a calcium hydroxide preparation and dosing system (19), a defluorination agent storage and dosing system (20), an activated carbon powder preparation and dosing system (21), a PAM preparation and dosing system (22) and a denitrification agent storage and dosing system (23). The online detection system (251) is respectively arranged in the catalytic mixing reactor (3), the primary neutralization reaction tank (5), the secondary neutralization reaction tank (7), the sedimentation tank (10) and the clear water tank (13).

6. The system for coordinated deep treatment of multiple pollutants in industrial wastewater according to claim 5, characterized in that: The online detection system (251) includes one or more of the COD, ammonia nitrogen, total nitrogen, total phosphorus, fluoride and pH detection systems respectively arranged in each cell body.

7. The system for the coordinated deep treatment of multiple pollutants in industrial wastewater according to claim 6 is characterized by: The catalytic reaction tank aeration system (401), the primary neutralization reaction tank aeration system (501) and the secondary neutralization reaction tank aeration system (701) are connected to the air compression system through pipelines.

8. The system for coordinated deep treatment of multiple pollutants in industrial wastewater according to claim 6, characterized in that: The reagents added by the reagent dosing system (24) are one or more of flocculants, coagulants, defoaming agents and pH adjusters; the defluorinating agents added by the defluorinating agent storage and dosing system are one or more of aluminum-containing or iron-containing agents; the denitrifying agents added by the denitrifying agent storage and dosing system (23) are one or more of agents that have oxidizing properties to nitrogen-containing compounds.

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