CN214192938U - Nitrobenzene wastewater treatment system - Google Patents
Nitrobenzene wastewater treatment system Download PDFInfo
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- CN214192938U CN214192938U CN202022894007.6U CN202022894007U CN214192938U CN 214192938 U CN214192938 U CN 214192938U CN 202022894007 U CN202022894007 U CN 202022894007U CN 214192938 U CN214192938 U CN 214192938U
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Abstract
The utility model discloses a nitrobenzene wastewater treatment system, which relates to the field of industrial wastewater treatment and comprises an adjusting tank, a pretreatment tank, a reduction tank dosing device, an anoxic activated sludge tank, an anoxic sedimentation tank, an aerobic activated sludge tank, an aerobic sedimentation tank, a contact oxidation sedimentation tank, an advanced treatment tank, a deep treatment dosing device, a sludge tank and a dosing room; the nitrobenzene wastewater treatment system adopts an electrochemical reduction, three-stage biochemistry and improved Fenton combined treatment process to design a nitrobenzene wastewater treatment project, the design process has a good treatment effect on nitrobenzene wastewater, the index mean value of main pollutants in treated effluent meets the requirements of the drainage basin water pollutant comprehensive discharge standard, the treatment cost is low, and the process has remarkable impact resistance and strong operation stability.
Description
Technical Field
The utility model relates to an industrial wastewater treatment field especially relates to a nitrobenzene effluent disposal system.
Background
The nitrobenzene wastewater is mainly wastewater generated by neutralization separation and water washing separation after the wastewater is subjected to steam stripping treatment, so that the operation stability of the steam stripping tower has a key influence on the quality of the generated wastewater, and the quality of the wastewater entering the regulating tank is often greatly fluctuated due to unstable operation of the steam stripping tower. The wastewater has high water quality fluctuation, contains a large amount of inorganic salts, and has main organic pollutants of nitrobenzene substances which are difficult to biodegrade, so that the treatment difficulty of the nitrobenzene wastewater is greatly increased.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a nitrobenzene waste water treatment system.
The technical problem of the utility model is realized through following technical scheme:
a nitrobenzene wastewater treatment system comprises a nitrobenzene wastewater treatment system, which comprises an adjusting tank, a pretreatment tank, a reduction tank dosing device, an anoxic activated sludge tank, an anoxic sedimentation tank, an aerobic activated sludge tank, an aerobic sedimentation tank, a contact oxidation sedimentation tank, an advanced treatment dosing device, a sludge tank and a dosing room; the method is characterized in that: the pretreatment tank is connected with the rear part of the adjusting tank, and the pretreatment tank is matched with a reduction tank dosing device; connect the biochemical processing system of syllogic behind the preliminary treatment pond, include: the three sections of the biochemical treatment system are respectively and independently provided with a sedimentation tank, and the three sections are sequentially as follows: an anoxic sedimentation tank, an aerobic sedimentation tank and a contact oxidation sedimentation tank; the outlet water of the biochemical treatment system is connected with an advanced treatment tank, and the advanced treatment tank is matched with an advanced treatment dosing device; the pretreatment tank, the anoxic sedimentation tank, the aerobic sedimentation tank and the contact oxidation sedimentation tank are connected with a sludge tank; the dosing and dosing room is connected with a dosing device of the reduction pool and a deep treatment dosing device.
Furthermore, the adjusting tank is connected with an accident tank, and the adjusting tank and the accident tank are matched with a perforated pipe aeration device, an air blower and a wastewater lifting pump.
Furthermore, the pretreatment tank adopts an electrochemical reduction-air flotation integrated machine which is additionally provided with a dissolved air tank and a foam scraping device.
Furthermore, the anoxic activated sludge tank is additionally provided with a water distribution and jet flow stirring and mixing device which is matched with a jet flow circulating pump.
Furthermore, the aerobic activated sludge tank is matched with a jet aerator, a circulating water pump and an air blower.
Further, the contact oxidation tank is matched with a jet aerator, a circulating water pump and a blower.
Furthermore, the advanced treatment tank is an improved Fenton reaction sedimentation tank, and a sedimentation zone of the advanced treatment tank is provided with an inclined tube filler and is matched with a stirring device.
To sum up, the utility model discloses following beneficial effect has:
the nitrobenzene wastewater treatment system adopts an electrochemical reduction, three-stage biochemistry and improved Fenton combined treatment process to design a nitrobenzene wastewater treatment project, the design process has a good treatment effect on nitrobenzene wastewater, the index mean value of main pollutants in treated effluent meets the requirements of the drainage basin water pollutant comprehensive discharge standard, the treatment cost is low, and the process has remarkable impact resistance and strong operation stability.
Drawings
FIG. 1 is a process flow diagram of the wastewater treatment system.
Description of reference numerals: 1 equalizing basin, 2 accident ponds, 3 preliminary treatment ponds, 301 reduction pond charge device, 4 oxygen deficiency activated sludge ponds, 5 oxygen deficiency sedimentation tanks, 6 good oxygen activated sludge ponds, 7 good oxygen sedimentation tanks, 8 contact oxidation ponds, 9 contact oxidation sedimentation tanks, 10 advanced treatment ponds, 1001 depths reason charge device, 11 sludge impoundments, 12 join in marriage between the medicine.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The utility model discloses a nitrobenzene effluent disposal system. Referring to fig. 1, the device comprises an adjusting tank 1, a pretreatment tank 3, a reduction tank dosing device 301, an anoxic activated sludge tank 4, an anoxic sedimentation tank 5, an aerobic activated sludge tank 6, an aerobic sedimentation tank 7, a contact oxidation tank 8, a contact oxidation sedimentation tank 9, an advanced treatment tank 10, an advanced treatment dosing device 1001, a sludge tank 11 and a dosing room 12; the method is characterized in that: the pretreatment tank 3 is connected behind the adjusting tank 1, and the pretreatment tank 3 is matched with a reduction tank dosing device 301; pretreatment tank 3 is followed and is connect three-section biochemical treatment system, includes: an anoxic activated sludge tank 4, an aerobic activated sludge tank 6 and a contact oxidation tank 8, wherein the three sections of the biochemical treatment system are respectively and independently provided with a sedimentation tank, and the three sections are sequentially as follows: an anoxic sedimentation tank 5, an aerobic sedimentation tank 7 and a contact oxidation sedimentation tank 9; the effluent of the biochemical treatment system is connected with an advanced treatment tank 10, and the advanced treatment tank 10 is matched with an advanced treatment dosing device 1001; the pretreatment tank 3, the anoxic sedimentation tank 5, the aerobic sedimentation tank 7 and the contact oxidation sedimentation tank 9 are connected with a sludge tank 11; the dosing room 12 is connected with a reduction pool dosing device 301 and a deep treatment dosing device 1001.
As shown in figure 1, nitrobenzene wastewater produced in the production process of an enterprise automatically flows into a regulating reservoir 1 to realize the balance regulation of water quality and water quantity, the regulating reservoir 1 is also matched with a perforated pipe aeration device, an air blower and a wastewater lifting pump, when the production of the enterprise is abnormal, the wastewater is lifted from the regulating reservoir 1 to an accident reservoir 2 for temporary storage, then lifted from the accident reservoir 2 to the regulating reservoir 1 to be gradually absorbed and treated, and the accident reservoir 2 is also matched with the perforated pipe aeration device and the wastewater lifting pump. Waste water of equalizing basin 1 is promoted to pretreatment tank 3 through the elevator pump, pretreatment tank 3 adopts "electrochemistry reduction-air supporting all-in-one", "electrochemistry reduction-air supporting all-in-one" subsidiary dissolved air jar and scrape the foam device, supporting reduction tank charge device 301 in addition, through the difficult biodegradable nitrobenzene reduction of electrochemistry reduction mode in with waste water for can be by biodegradable aniline, its theory of operation does, under the DC power supply effect of low-voltage, high current, red copper cathode plate gets the electron and generates the hydrogen free radical that reducibility is stronger, reduce nitrobenzene in the waste water for aniline, carbon steel anode plate loses electron and generates Fe2+The reduction reaction process of nitrobenzene is strengthened. Fe2+Is oxidized into Fe by oxygen in the air introduced by the dissolved air tank3+Then with OH in the wastewater-The reaction is carried out to generate the new ecological Fe (OH)3The floc has strong adsorption performance, can effectively remove soluble organic pollutants and chromaticity in the wastewater, and then separates mud from water in an air floatation mode to realize wastewater purification.
The wastewater after electrochemical pretreatment enters a three-stage biochemical treatment system, wherein the three-stage biochemical treatment system comprises: an anoxic activated sludge tank 4, an aerobic activated sludge tank 6 and a contact oxidation tank 8, wherein the anoxic activated sludge tank 4 is additionally provided with a water distribution and jet flow stirring and mixing device which is matched with a jet flow circulating pump. The aerobic activated sludge tank 6 is matched with a jet aerator, a circulating water pump and an air blower. The contact oxidation tank 8 is matched with a jet aerator, a circulating water pump and an air blower.
The three-stage biochemical treatment system adopts a sludge-string membrane three-stage biochemical combined process of anoxic activated sludge, aerobic activated sludge and contact oxidation, utilizes different ecological bacterial colony structures of the anoxic activated sludge, the aerobic activated sludge and the aerobic biomembrane, fully exerts the degradation performance of microorganisms, and reduces the content of pollutants in wastewater by utilizing a biological treatment method with ecological safety and low cost to the maximum extent. Three sections of the wastewater biochemical treatment system are respectively and independently provided with a sedimentation tank and a sludge reflux device so as to ensure the stability of bacterial colonies in the three sections.
The effluent of the biochemical system enters an advanced treatment tank 10, the advanced treatment tank 10 is an improved Fenton reaction sedimentation tank, inclined tube packing is installed in a sedimentation zone of the advanced treatment tank, and a deep treatment dosing device 1001 and a stirring device are matched with the inclined tube packing. The advanced treatment of the wastewater adopts an improved Fenton process, optimizes the key parameters of the Fenton reaction, such as reaction pH, reaction ORP, catalyst ferrite and oxidant hydrogen peroxide addition proportion, greatly reduces organic pollutants and chromaticity in the wastewater through the comprehensive action of oxidation of hydroxyl free radicals and flocculation of ferric salt, further improves the effluent quality, and ensures that the wastewater is stably discharged after reaching the standard. Pretreatment tank 3, oxygen deficiency sedimentation tank 5, good oxygen sedimentation tank 7 and contact oxidation sedimentation tank 9 connect sludge impoundment 11, sludge impoundment 11 subsidiary mixer, supporting plate frame filter-press hydroextractor. Sludge generated in the whole process is temporarily stored in a sludge tank, enters a sludge dewatering device for dewatering treatment and is transported to outside for disposal.
The dosing room 12 is connected with a reduction pool dosing device 301 and a deep treatment dosing device 1001, and plays a role in metering and dosing.
Above do the preferred embodiment of the present invention, not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (7)
1. A nitrobenzene wastewater treatment system comprises an adjusting tank (1), a pretreatment tank (3), a reduction tank dosing device (301), an anoxic activated sludge tank (4), an anoxic sedimentation tank (5), an aerobic activated sludge tank (6), an aerobic sedimentation tank (7), a contact oxidation tank (8), a contact oxidation sedimentation tank (9), an advanced treatment tank (10), an advanced dosing device (1001), a sludge tank (11) and a dosing room (12); the method is characterized in that: the adjusting tank (1) is connected with the pretreatment tank (3) in back, and the pretreatment tank (3) is matched with the reduction tank dosing device (301); pretreatment tank (3) is followed and is connect three-section type biochemical treatment system, includes: oxygen deficiency activated sludge pond (4), good oxygen activated sludge pond (6) and contact oxidation pond (8), the three workshop section of biochemical treatment system all sets up the sedimentation tank alone, does in proper order: an anoxic sedimentation tank (5), an aerobic sedimentation tank (7) and a contact oxidation sedimentation tank (9); the outlet water of the biochemical treatment system is connected with an advanced treatment tank (10), and the advanced treatment tank (10) is matched with an advanced treatment dosing device 1001; the pretreatment tank (3), the anoxic sedimentation tank (5), the aerobic sedimentation tank (7) and the contact oxidation sedimentation tank (9) are connected with a sludge tank (11); the dosing and dosing room (12) is connected with a reduction pool dosing device (301) and a deep treatment dosing device (1001).
2. The nitrobenzene wastewater treatment system according to claim 1, wherein: the adjusting tank (1) is connected with the accident tank (2), and the adjusting tank (1) and the accident tank (2) are matched with a perforated pipe aeration device, an air blower and a wastewater lifting pump.
3. The nitrobenzene wastewater treatment system according to claim 1, wherein: the pretreatment tank (3) adopts an electrochemical reduction-air flotation integrated machine which is additionally provided with a dissolved air tank and a foam scraping device.
4. The nitrobenzene wastewater treatment system according to claim 1, wherein: the anoxic activated sludge tank (4) is provided with a water distribution and jet flow stirring and mixing device which is matched with a jet flow circulating pump.
5. The nitrobenzene wastewater treatment system according to claim 1, wherein: the aerobic activated sludge tank (6) is matched with a jet aerator, a circulating water pump and an air blower.
6. The nitrobenzene wastewater treatment system according to claim 1, wherein: the contact oxidation tank (8) is matched with a jet aerator, a circulating water pump and a blower.
7. The nitrobenzene wastewater treatment system according to claim 1, wherein: the advanced treatment tank (10) is an improved Fenton reaction sedimentation tank, and an inclined tube filler is arranged in a sedimentation zone of the advanced treatment tank, and is matched with a stirring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022894007.6U CN214192938U (en) | 2020-12-07 | 2020-12-07 | Nitrobenzene wastewater treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022894007.6U CN214192938U (en) | 2020-12-07 | 2020-12-07 | Nitrobenzene wastewater treatment system |
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| Publication Number | Publication Date |
|---|---|
| CN214192938U true CN214192938U (en) | 2021-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022894007.6U Active CN214192938U (en) | 2020-12-07 | 2020-12-07 | Nitrobenzene wastewater treatment system |
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|---|---|
| CN (1) | CN214192938U (en) |
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- 2020-12-07 CN CN202022894007.6U patent/CN214192938U/en active Active
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